1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #endif 63 64 #include <stdarg.h> 65 #include <string.h> 66 #include <stdio.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 #define HCI_RESET_RESEND_TIMEOUT_MS 200 98 99 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 100 #ifndef GAP_INQUIRY_MAX_NAME_LEN 101 #define GAP_INQUIRY_MAX_NAME_LEN 32 102 #endif 103 104 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 105 #define GAP_INQUIRY_DURATION_MIN 0x01 106 #define GAP_INQUIRY_DURATION_MAX 0x30 107 #define GAP_INQUIRY_STATE_ACTIVE 0x80 108 #define GAP_INQUIRY_STATE_IDLE 0 109 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 110 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 111 112 // GAP Remote Name Request 113 #define GAP_REMOTE_NAME_STATE_IDLE 0 114 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 115 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 116 117 // GAP Pairing 118 #define GAP_PAIRING_STATE_IDLE 0 119 #define GAP_PAIRING_STATE_SEND_PIN 1 120 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 121 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 122 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 123 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 124 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 125 126 127 // prototypes 128 #ifdef ENABLE_CLASSIC 129 static void hci_update_scan_enable(void); 130 static void hci_emit_discoverable_enabled(uint8_t enabled); 131 static int hci_local_ssp_activated(void); 132 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 133 static void hci_notify_if_sco_can_send_now(void); 134 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 135 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 136 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 137 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 138 static void hci_connection_timestamp(hci_connection_t *connection); 139 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 140 static void gap_inquiry_explode(uint8_t * packet); 141 #endif 142 143 static int hci_power_control_on(void); 144 static void hci_power_control_off(void); 145 static void hci_state_reset(void); 146 static void hci_emit_transport_packet_sent(void); 147 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 148 static void hci_emit_nr_connections_changed(void); 149 static void hci_emit_hci_open_failed(void); 150 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 151 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 152 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 153 static void hci_run(void); 154 static int hci_is_le_connection(hci_connection_t * connection); 155 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 156 157 #ifdef ENABLE_BLE 158 #ifdef ENABLE_LE_CENTRAL 159 // called from test/ble_client/advertising_data_parser.c 160 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 161 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 162 static hci_connection_t * gap_get_outgoing_connection(void); 163 #endif 164 #endif 165 166 // the STACK is here 167 #ifndef HAVE_MALLOC 168 static hci_stack_t hci_stack_static; 169 #endif 170 static hci_stack_t * hci_stack = NULL; 171 172 #ifdef ENABLE_CLASSIC 173 // default name 174 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 175 176 // test helper 177 static uint8_t disable_l2cap_timeouts = 0; 178 #endif 179 180 /** 181 * create connection for given address 182 * 183 * @return connection OR NULL, if no memory left 184 */ 185 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 186 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 187 hci_connection_t * conn = btstack_memory_hci_connection_get(); 188 if (!conn) return NULL; 189 bd_addr_copy(conn->address, addr); 190 conn->address_type = addr_type; 191 conn->con_handle = 0xffff; 192 conn->authentication_flags = AUTH_FLAGS_NONE; 193 conn->bonding_flags = 0; 194 conn->requested_security_level = LEVEL_0; 195 #ifdef ENABLE_CLASSIC 196 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 197 btstack_run_loop_set_timer_context(&conn->timeout, conn); 198 hci_connection_timestamp(conn); 199 conn->num_sco_bytes_sent = 0; 200 #endif 201 conn->acl_recombination_length = 0; 202 conn->acl_recombination_pos = 0; 203 conn->num_packets_sent = 0; 204 205 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 206 #ifdef ENABLE_BLE 207 conn->le_phy_update_all_phys = 0xff; 208 #endif 209 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 210 return conn; 211 } 212 213 214 /** 215 * get le connection parameter range 216 * 217 * @return le connection parameter range struct 218 */ 219 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 220 *range = hci_stack->le_connection_parameter_range; 221 } 222 223 /** 224 * set le connection parameter range 225 * 226 */ 227 228 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 229 hci_stack->le_connection_parameter_range = *range; 230 } 231 232 /** 233 * @brief Test if connection parameters are inside in existing rage 234 * @param conn_interval_min (unit: 1.25ms) 235 * @param conn_interval_max (unit: 1.25ms) 236 * @param conn_latency 237 * @param supervision_timeout (unit: 10ms) 238 * @returns 1 if included 239 */ 240 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 241 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 242 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 243 244 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 245 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 246 247 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 248 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 249 250 return 1; 251 } 252 253 /** 254 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 255 * @note: default: 1 256 * @param max_peripheral_connections 257 */ 258 #ifdef ENABLE_LE_PERIPHERAL 259 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 260 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 261 } 262 #endif 263 264 /** 265 * get hci connections iterator 266 * 267 * @return hci connections iterator 268 */ 269 270 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 271 btstack_linked_list_iterator_init(it, &hci_stack->connections); 272 } 273 274 /** 275 * get connection for a given handle 276 * 277 * @return connection OR NULL, if not found 278 */ 279 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 280 btstack_linked_list_iterator_t it; 281 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 282 while (btstack_linked_list_iterator_has_next(&it)){ 283 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 284 if ( item->con_handle == con_handle ) { 285 return item; 286 } 287 } 288 return NULL; 289 } 290 291 /** 292 * get connection for given address 293 * 294 * @return connection OR NULL, if not found 295 */ 296 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 297 btstack_linked_list_iterator_t it; 298 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 299 while (btstack_linked_list_iterator_has_next(&it)){ 300 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 301 if (connection->address_type != addr_type) continue; 302 if (memcmp(addr, connection->address, 6) != 0) continue; 303 return connection; 304 } 305 return NULL; 306 } 307 308 309 #ifdef ENABLE_CLASSIC 310 311 #ifdef ENABLE_SCO_OVER_HCI 312 static int hci_number_sco_connections(void){ 313 int connections = 0; 314 btstack_linked_list_iterator_t it; 315 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 316 while (btstack_linked_list_iterator_has_next(&it)){ 317 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 318 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 319 connections++; 320 } 321 return connections; 322 } 323 #endif 324 325 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 326 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 327 #ifdef HAVE_EMBEDDED_TICK 328 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 329 // connections might be timed out 330 hci_emit_l2cap_check_timeout(connection); 331 } 332 #else 333 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 334 // connections might be timed out 335 hci_emit_l2cap_check_timeout(connection); 336 } 337 #endif 338 } 339 340 static void hci_connection_timestamp(hci_connection_t *connection){ 341 #ifdef HAVE_EMBEDDED_TICK 342 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 343 #else 344 connection->timestamp = btstack_run_loop_get_time_ms(); 345 #endif 346 } 347 348 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 349 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 350 } 351 352 353 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 354 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 355 } 356 357 /** 358 * add authentication flags and reset timer 359 * @note: assumes classic connection 360 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 361 */ 362 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 363 bd_addr_t addr; 364 reverse_bd_addr(bd_addr, addr); 365 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 366 if (conn) { 367 connectionSetAuthenticationFlags(conn, flags); 368 hci_connection_timestamp(conn); 369 } 370 } 371 372 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 373 hci_connection_t * conn = hci_connection_for_handle(handle); 374 if (!conn) return 0; 375 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 376 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 377 return 0; 378 } 379 380 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 381 if (!hci_stack->link_key_db) return; 382 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 383 hci_stack->link_key_db->delete_link_key(addr); 384 } 385 386 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 387 if (!hci_stack->link_key_db) return; 388 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 389 hci_stack->link_key_db->put_link_key(addr, link_key, type); 390 } 391 392 void gap_delete_all_link_keys(void){ 393 bd_addr_t addr; 394 link_key_t link_key; 395 link_key_type_t type; 396 btstack_link_key_iterator_t it; 397 int ok = gap_link_key_iterator_init(&it); 398 if (!ok) { 399 log_error("could not initialize iterator"); 400 return; 401 } 402 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 403 gap_drop_link_key_for_bd_addr(addr); 404 } 405 gap_link_key_iterator_done(&it); 406 } 407 408 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 409 if (!hci_stack->link_key_db) return 0; 410 if (!hci_stack->link_key_db->iterator_init) return 0; 411 return hci_stack->link_key_db->iterator_init(it); 412 } 413 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 414 if (!hci_stack->link_key_db) return 0; 415 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 416 } 417 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 418 if (!hci_stack->link_key_db) return; 419 hci_stack->link_key_db->iterator_done(it); 420 } 421 #endif 422 423 static int hci_is_le_connection(hci_connection_t * connection){ 424 switch (connection->address_type){ 425 case BD_ADDR_TYPE_LE_PUBLIC: 426 case BD_ADDR_TYPE_LE_RANDOM: 427 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 428 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 429 return 1; 430 default: 431 return 0; 432 } 433 } 434 435 /** 436 * count connections 437 */ 438 static int nr_hci_connections(void){ 439 int count = 0; 440 btstack_linked_item_t *it; 441 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 442 return count; 443 } 444 445 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 446 447 unsigned int num_packets_sent_classic = 0; 448 unsigned int num_packets_sent_le = 0; 449 450 btstack_linked_item_t *it; 451 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 452 hci_connection_t * connection = (hci_connection_t *) it; 453 if (hci_is_le_connection(connection)){ 454 num_packets_sent_le += connection->num_packets_sent; 455 } 456 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 457 num_packets_sent_classic += connection->num_packets_sent; 458 } 459 } 460 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 461 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 462 int free_slots_le = 0; 463 464 if (free_slots_classic < 0){ 465 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 466 return 0; 467 } 468 469 if (hci_stack->le_acl_packets_total_num){ 470 // if we have LE slots, they are used 471 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 472 if (free_slots_le < 0){ 473 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 474 return 0; 475 } 476 } else { 477 // otherwise, classic slots are used for LE, too 478 free_slots_classic -= num_packets_sent_le; 479 if (free_slots_classic < 0){ 480 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 481 return 0; 482 } 483 } 484 485 switch (address_type){ 486 case BD_ADDR_TYPE_UNKNOWN: 487 log_error("hci_number_free_acl_slots: unknown address type"); 488 return 0; 489 490 case BD_ADDR_TYPE_CLASSIC: 491 return free_slots_classic; 492 493 default: 494 if (hci_stack->le_acl_packets_total_num){ 495 return free_slots_le; 496 } 497 return free_slots_classic; 498 } 499 } 500 501 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 502 // get connection type 503 hci_connection_t * connection = hci_connection_for_handle(con_handle); 504 if (!connection){ 505 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 506 return 0; 507 } 508 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 509 } 510 511 #ifdef ENABLE_CLASSIC 512 static int hci_number_free_sco_slots(void){ 513 unsigned int num_sco_packets_sent = 0; 514 btstack_linked_item_t *it; 515 if (hci_stack->synchronous_flow_control_enabled){ 516 // explicit flow control 517 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 518 hci_connection_t * connection = (hci_connection_t *) it; 519 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 520 num_sco_packets_sent += connection->num_packets_sent; 521 } 522 } else { 523 // implicit flow control 524 uint16_t num_sco_bytes_sent = 0; 525 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 526 hci_connection_t * connection = (hci_connection_t *) it; 527 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 528 num_sco_bytes_sent += connection->num_sco_bytes_sent; 529 } 530 // deduce used slots from num sco bytes (plus 2 extra to be on the safe side) 531 unsigned int sco_payload_len = hci_get_sco_packet_length() - 3; 532 num_sco_packets_sent = (num_sco_bytes_sent / sco_payload_len) + 2; 533 log_info("hci_number_free_sco_slots: bytes sent %u -> packets sent %u", num_sco_bytes_sent, num_sco_packets_sent); 534 } 535 536 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 537 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 538 return 0; 539 } 540 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 541 } 542 #endif 543 544 // only used to send HCI Host Number Completed Packets 545 static int hci_can_send_comand_packet_transport(void){ 546 if (hci_stack->hci_packet_buffer_reserved) return 0; 547 548 // check for async hci transport implementations 549 if (hci_stack->hci_transport->can_send_packet_now){ 550 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 551 return 0; 552 } 553 } 554 return 1; 555 } 556 557 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 558 int hci_can_send_command_packet_now(void){ 559 if (hci_can_send_comand_packet_transport() == 0) return 0; 560 return hci_stack->num_cmd_packets > 0; 561 } 562 563 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 564 // check for async hci transport implementations 565 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 566 return hci_stack->hci_transport->can_send_packet_now(packet_type); 567 } 568 569 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 570 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 571 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 572 } 573 574 int hci_can_send_acl_le_packet_now(void){ 575 if (hci_stack->hci_packet_buffer_reserved) return 0; 576 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 577 } 578 579 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 580 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 581 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 582 } 583 584 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 585 if (hci_stack->hci_packet_buffer_reserved) return 0; 586 return hci_can_send_prepared_acl_packet_now(con_handle); 587 } 588 589 #ifdef ENABLE_CLASSIC 590 int hci_can_send_acl_classic_packet_now(void){ 591 if (hci_stack->hci_packet_buffer_reserved) return 0; 592 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 593 } 594 595 int hci_can_send_prepared_sco_packet_now(void){ 596 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 597 return hci_number_free_sco_slots() > 0; 598 } 599 600 int hci_can_send_sco_packet_now(void){ 601 if (hci_stack->hci_packet_buffer_reserved) return 0; 602 return hci_can_send_prepared_sco_packet_now(); 603 } 604 605 void hci_request_sco_can_send_now_event(void){ 606 hci_stack->sco_waiting_for_can_send_now = 1; 607 hci_notify_if_sco_can_send_now(); 608 } 609 #endif 610 611 // used for internal checks in l2cap.c 612 int hci_is_packet_buffer_reserved(void){ 613 return hci_stack->hci_packet_buffer_reserved; 614 } 615 616 // reserves outgoing packet buffer. @returns 1 if successful 617 int hci_reserve_packet_buffer(void){ 618 if (hci_stack->hci_packet_buffer_reserved) { 619 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 620 return 0; 621 } 622 hci_stack->hci_packet_buffer_reserved = 1; 623 return 1; 624 } 625 626 void hci_release_packet_buffer(void){ 627 hci_stack->hci_packet_buffer_reserved = 0; 628 } 629 630 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 631 static int hci_transport_synchronous(void){ 632 return hci_stack->hci_transport->can_send_packet_now == NULL; 633 } 634 635 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 636 637 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 638 639 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 640 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 641 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 642 max_acl_data_packet_length = hci_stack->le_data_packets_length; 643 } 644 645 // testing: reduce buffer to minimum 646 // max_acl_data_packet_length = 52; 647 648 log_debug("hci_send_acl_packet_fragments entered"); 649 650 int err; 651 // multiple packets could be send on a synchronous HCI transport 652 while (1){ 653 654 log_debug("hci_send_acl_packet_fragments loop entered"); 655 656 // get current data 657 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 658 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 659 int more_fragments = 0; 660 661 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 662 if (current_acl_data_packet_length > max_acl_data_packet_length){ 663 more_fragments = 1; 664 current_acl_data_packet_length = max_acl_data_packet_length; 665 } 666 667 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 668 if (acl_header_pos > 0){ 669 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 670 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 671 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 672 } 673 674 // update header len 675 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 676 677 // count packet 678 connection->num_packets_sent++; 679 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 680 681 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 682 if (more_fragments){ 683 // update start of next fragment to send 684 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 685 } else { 686 // done 687 hci_stack->acl_fragmentation_pos = 0; 688 hci_stack->acl_fragmentation_total_size = 0; 689 } 690 691 // send packet 692 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 693 const int size = current_acl_data_packet_length + 4; 694 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 695 hci_stack->acl_fragmentation_tx_active = 1; 696 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 697 698 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 699 700 // done yet? 701 if (!more_fragments) break; 702 703 // can send more? 704 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 705 } 706 707 log_debug("hci_send_acl_packet_fragments loop over"); 708 709 // release buffer now for synchronous transport 710 if (hci_transport_synchronous()){ 711 hci_stack->acl_fragmentation_tx_active = 0; 712 hci_release_packet_buffer(); 713 hci_emit_transport_packet_sent(); 714 } 715 716 return err; 717 } 718 719 // pre: caller has reserved the packet buffer 720 int hci_send_acl_packet_buffer(int size){ 721 722 // log_info("hci_send_acl_packet_buffer size %u", size); 723 724 if (!hci_stack->hci_packet_buffer_reserved) { 725 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 726 return 0; 727 } 728 729 uint8_t * packet = hci_stack->hci_packet_buffer; 730 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 731 732 // check for free places on Bluetooth module 733 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 734 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 735 hci_release_packet_buffer(); 736 hci_emit_transport_packet_sent(); 737 return BTSTACK_ACL_BUFFERS_FULL; 738 } 739 740 hci_connection_t *connection = hci_connection_for_handle( con_handle); 741 if (!connection) { 742 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 743 hci_release_packet_buffer(); 744 hci_emit_transport_packet_sent(); 745 return 0; 746 } 747 748 #ifdef ENABLE_CLASSIC 749 hci_connection_timestamp(connection); 750 #endif 751 752 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 753 754 // setup data 755 hci_stack->acl_fragmentation_total_size = size; 756 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 757 758 return hci_send_acl_packet_fragments(connection); 759 } 760 761 #ifdef ENABLE_CLASSIC 762 // pre: caller has reserved the packet buffer 763 int hci_send_sco_packet_buffer(int size){ 764 765 // log_info("hci_send_acl_packet_buffer size %u", size); 766 767 if (!hci_stack->hci_packet_buffer_reserved) { 768 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 769 return 0; 770 } 771 772 uint8_t * packet = hci_stack->hci_packet_buffer; 773 774 // skip checks in loopback mode 775 if (!hci_stack->loopback_mode){ 776 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 777 778 // check for free places on Bluetooth module 779 if (!hci_can_send_prepared_sco_packet_now()) { 780 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 781 hci_release_packet_buffer(); 782 hci_emit_transport_packet_sent(); 783 return BTSTACK_ACL_BUFFERS_FULL; 784 } 785 786 // track send packet in connection struct 787 hci_connection_t *connection = hci_connection_for_handle( con_handle); 788 if (!connection) { 789 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 790 hci_release_packet_buffer(); 791 hci_emit_transport_packet_sent(); 792 return 0; 793 } 794 if (hci_stack->synchronous_flow_control_enabled){ 795 connection->num_packets_sent++; 796 } else { 797 uint16_t sco_payload_len = size - 3; 798 connection->num_sco_bytes_sent += sco_payload_len; 799 } 800 } 801 802 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 803 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 804 805 if (hci_transport_synchronous()){ 806 hci_release_packet_buffer(); 807 hci_emit_transport_packet_sent(); 808 } 809 810 return err; 811 } 812 #endif 813 814 static void acl_handler(uint8_t *packet, int size){ 815 816 // log_info("acl_handler: size %u", size); 817 818 // get info 819 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 820 hci_connection_t *conn = hci_connection_for_handle(con_handle); 821 uint8_t acl_flags = READ_ACL_FLAGS(packet); 822 uint16_t acl_length = READ_ACL_LENGTH(packet); 823 824 // ignore non-registered handle 825 if (!conn){ 826 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 827 return; 828 } 829 830 // assert packet is complete 831 if (acl_length + 4 != size){ 832 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 833 return; 834 } 835 836 #ifdef ENABLE_CLASSIC 837 // update idle timestamp 838 hci_connection_timestamp(conn); 839 #endif 840 841 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 842 hci_stack->host_completed_packets = 1; 843 conn->num_packets_completed++; 844 #endif 845 846 // handle different packet types 847 switch (acl_flags & 0x03) { 848 849 case 0x01: // continuation fragment 850 851 // sanity checks 852 if (conn->acl_recombination_pos == 0) { 853 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 854 return; 855 } 856 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 857 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 858 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 859 conn->acl_recombination_pos = 0; 860 return; 861 } 862 863 // append fragment payload (header already stored) 864 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 865 conn->acl_recombination_pos += acl_length; 866 867 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 868 // conn->acl_recombination_pos, conn->acl_recombination_length); 869 870 // forward complete L2CAP packet if complete. 871 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 872 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 873 // reset recombination buffer 874 conn->acl_recombination_length = 0; 875 conn->acl_recombination_pos = 0; 876 } 877 break; 878 879 case 0x02: { // first fragment 880 881 // sanity check 882 if (conn->acl_recombination_pos) { 883 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 884 conn->acl_recombination_pos = 0; 885 } 886 887 // peek into L2CAP packet! 888 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 889 890 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 891 892 // compare fragment size to L2CAP packet size 893 if (acl_length >= l2cap_length + 4){ 894 // forward fragment as L2CAP packet 895 hci_emit_acl_packet(packet, acl_length + 4); 896 } else { 897 898 if (acl_length > HCI_ACL_BUFFER_SIZE){ 899 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 900 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 901 return; 902 } 903 904 // store first fragment and tweak acl length for complete package 905 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 906 conn->acl_recombination_pos = acl_length + 4; 907 conn->acl_recombination_length = l2cap_length; 908 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 909 } 910 break; 911 912 } 913 default: 914 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 915 return; 916 } 917 918 // execute main loop 919 hci_run(); 920 } 921 922 static void hci_shutdown_connection(hci_connection_t *conn){ 923 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 924 925 #ifdef ENABLE_CLASSIC 926 #ifdef ENABLE_SCO_OVER_HCI 927 int addr_type = conn->address_type; 928 #endif 929 #endif 930 931 btstack_run_loop_remove_timer(&conn->timeout); 932 933 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 934 btstack_memory_hci_connection_free( conn ); 935 936 // now it's gone 937 hci_emit_nr_connections_changed(); 938 939 #ifdef ENABLE_CLASSIC 940 #ifdef ENABLE_SCO_OVER_HCI 941 // update SCO 942 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 943 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 944 } 945 #endif 946 #endif 947 } 948 949 #ifdef ENABLE_CLASSIC 950 951 static const uint16_t packet_type_sizes[] = { 952 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 953 HCI_ACL_DH1_SIZE, 0, 0, 0, 954 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 955 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 956 }; 957 static const uint8_t packet_type_feature_requirement_bit[] = { 958 0, // 3 slot packets 959 1, // 5 slot packets 960 25, // EDR 2 mpbs 961 26, // EDR 3 mbps 962 39, // 3 slot EDR packts 963 40, // 5 slot EDR packet 964 }; 965 static const uint16_t packet_type_feature_packet_mask[] = { 966 0x0f00, // 3 slot packets 967 0xf000, // 5 slot packets 968 0x1102, // EDR 2 mpbs 969 0x2204, // EDR 3 mbps 970 0x0300, // 3 slot EDR packts 971 0x3000, // 5 slot EDR packet 972 }; 973 974 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 975 // enable packet types based on size 976 uint16_t packet_types = 0; 977 unsigned int i; 978 for (i=0;i<16;i++){ 979 if (packet_type_sizes[i] == 0) continue; 980 if (packet_type_sizes[i] <= buffer_size){ 981 packet_types |= 1 << i; 982 } 983 } 984 // disable packet types due to missing local supported features 985 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 986 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 987 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 988 if (feature_set) continue; 989 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 990 packet_types &= ~packet_type_feature_packet_mask[i]; 991 } 992 // flip bits for "may not be used" 993 packet_types ^= 0x3306; 994 return packet_types; 995 } 996 997 uint16_t hci_usable_acl_packet_types(void){ 998 return hci_stack->packet_types; 999 } 1000 #endif 1001 1002 uint8_t* hci_get_outgoing_packet_buffer(void){ 1003 // hci packet buffer is >= acl data packet length 1004 return hci_stack->hci_packet_buffer; 1005 } 1006 1007 uint16_t hci_max_acl_data_packet_length(void){ 1008 return hci_stack->acl_data_packet_length; 1009 } 1010 1011 #ifdef ENABLE_CLASSIC 1012 int hci_extended_sco_link_supported(void){ 1013 // No. 31, byte 3, bit 7 1014 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1015 } 1016 #endif 1017 1018 int hci_non_flushable_packet_boundary_flag_supported(void){ 1019 // No. 54, byte 6, bit 6 1020 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 1021 } 1022 1023 static int gap_ssp_supported(void){ 1024 // No. 51, byte 6, bit 3 1025 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 1026 } 1027 1028 static int hci_classic_supported(void){ 1029 #ifdef ENABLE_CLASSIC 1030 // No. 37, byte 4, bit 5, = No BR/EDR Support 1031 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1032 #else 1033 return 0; 1034 #endif 1035 } 1036 1037 static int hci_le_supported(void){ 1038 #ifdef ENABLE_BLE 1039 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1040 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1041 #else 1042 return 0; 1043 #endif 1044 } 1045 1046 #ifdef ENABLE_BLE 1047 1048 /** 1049 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1050 */ 1051 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1052 *addr_type = hci_stack->le_own_addr_type; 1053 if (hci_stack->le_own_addr_type){ 1054 memcpy(addr, hci_stack->le_random_address, 6); 1055 } else { 1056 memcpy(addr, hci_stack->local_bd_addr, 6); 1057 } 1058 } 1059 1060 #ifdef ENABLE_LE_CENTRAL 1061 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1062 1063 int offset = 3; 1064 int num_reports = packet[offset]; 1065 offset += 1; 1066 1067 int i; 1068 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1069 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1070 for (i=0; i<num_reports && offset < size;i++){ 1071 // sanity checks on data_length: 1072 uint8_t data_length = packet[offset + 8]; 1073 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1074 if (offset + 9 + data_length + 1 > size) return; 1075 // setup event 1076 uint8_t event_size = 10 + data_length; 1077 int pos = 0; 1078 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1079 event[pos++] = event_size; 1080 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 1081 offset += 8; 1082 pos += 8; 1083 event[pos++] = packet[offset + 1 + data_length]; // rssi 1084 event[pos++] = data_length; 1085 offset++; 1086 memcpy(&event[pos], &packet[offset], data_length); 1087 pos += data_length; 1088 offset += data_length + 1; // rssi 1089 hci_emit_event(event, pos, 1); 1090 } 1091 } 1092 #endif 1093 #endif 1094 1095 #ifdef ENABLE_BLE 1096 #ifdef ENABLE_LE_PERIPHERAL 1097 static void hci_reenable_advertisements_if_needed(void){ 1098 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1099 // get number of active le slave connections 1100 int num_slave_connections = 0; 1101 btstack_linked_list_iterator_t it; 1102 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1103 while (btstack_linked_list_iterator_has_next(&it)){ 1104 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1105 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1106 if (con->state != OPEN) continue; 1107 if (con->role != HCI_ROLE_SLAVE) continue; 1108 if (!hci_is_le_connection(con)) continue; 1109 num_slave_connections++; 1110 } 1111 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1112 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1113 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1114 } 1115 } 1116 } 1117 #endif 1118 #endif 1119 1120 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1121 1122 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1123 if (!hci_stack->config) return 0; 1124 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1125 // Limit baud rate for Broadcom chipsets to 3 mbps 1126 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 1127 baud_rate = 3000000; 1128 } 1129 return baud_rate; 1130 } 1131 1132 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1133 UNUSED(ds); 1134 1135 switch (hci_stack->substate){ 1136 case HCI_INIT_W4_SEND_RESET: 1137 log_info("Resend HCI Reset"); 1138 hci_stack->substate = HCI_INIT_SEND_RESET; 1139 hci_stack->num_cmd_packets = 1; 1140 hci_run(); 1141 break; 1142 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1143 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1144 if (hci_stack->hci_transport->reset_link){ 1145 hci_stack->hci_transport->reset_link(); 1146 } 1147 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1148 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1149 log_info("Resend HCI Reset - CSR Warm Boot"); 1150 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1151 hci_stack->num_cmd_packets = 1; 1152 hci_run(); 1153 break; 1154 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1155 if (hci_stack->hci_transport->set_baudrate){ 1156 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1157 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1158 hci_stack->hci_transport->set_baudrate(baud_rate); 1159 } 1160 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1161 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1162 if (hci_stack->hci_transport->reset_link){ 1163 log_info("Link Reset"); 1164 hci_stack->hci_transport->reset_link(); 1165 } 1166 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1167 hci_run(); 1168 } 1169 break; 1170 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1171 // otherwise continue 1172 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1173 hci_send_cmd(&hci_read_local_supported_commands); 1174 break; 1175 default: 1176 break; 1177 } 1178 } 1179 #endif 1180 1181 static void hci_initializing_next_state(void){ 1182 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1183 } 1184 1185 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_PERIPHERAL) 1186 static void hci_replace_bd_addr_placeholder(uint8_t * data, uint16_t size){ 1187 const int bd_addr_string_len = 17; 1188 int i = 0; 1189 while (i < size - bd_addr_string_len){ 1190 if (memcmp(&data[i], "00:00:00:00:00:00", bd_addr_string_len)) { 1191 i++; 1192 continue; 1193 } 1194 // set real address 1195 memcpy(&data[i], bd_addr_to_str(hci_stack->local_bd_addr), bd_addr_string_len); 1196 i += bd_addr_string_len; 1197 } 1198 } 1199 #endif 1200 1201 // assumption: hci_can_send_command_packet_now() == true 1202 static void hci_initializing_run(void){ 1203 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1204 switch (hci_stack->substate){ 1205 case HCI_INIT_SEND_RESET: 1206 hci_state_reset(); 1207 1208 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1209 // prepare reset if command complete not received in 100ms 1210 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1211 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1212 btstack_run_loop_add_timer(&hci_stack->timeout); 1213 #endif 1214 // send command 1215 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1216 hci_send_cmd(&hci_reset); 1217 break; 1218 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1219 hci_send_cmd(&hci_read_local_version_information); 1220 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1221 break; 1222 case HCI_INIT_SEND_READ_LOCAL_NAME: 1223 hci_send_cmd(&hci_read_local_name); 1224 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1225 break; 1226 1227 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1228 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1229 hci_state_reset(); 1230 // prepare reset if command complete not received in 100ms 1231 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1232 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1233 btstack_run_loop_add_timer(&hci_stack->timeout); 1234 // send command 1235 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1236 hci_send_cmd(&hci_reset); 1237 break; 1238 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1239 hci_state_reset(); 1240 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1241 hci_send_cmd(&hci_reset); 1242 break; 1243 case HCI_INIT_SEND_BAUD_CHANGE: { 1244 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1245 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1246 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1247 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1248 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1249 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1250 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1251 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1252 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1253 btstack_run_loop_add_timer(&hci_stack->timeout); 1254 } 1255 break; 1256 } 1257 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1258 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1259 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1260 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1261 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1262 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1263 break; 1264 } 1265 case HCI_INIT_CUSTOM_INIT: 1266 // Custom initialization 1267 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1268 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1269 if (valid_cmd){ 1270 int size = 3 + hci_stack->hci_packet_buffer[2]; 1271 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1272 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1273 switch (valid_cmd) { 1274 case BTSTACK_CHIPSET_VALID_COMMAND: 1275 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1276 break; 1277 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1278 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1279 log_info("CSR Warm Boot"); 1280 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1281 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1282 btstack_run_loop_add_timer(&hci_stack->timeout); 1283 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1284 && hci_stack->config 1285 && hci_stack->chipset 1286 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1287 && hci_stack->hci_transport->set_baudrate 1288 && hci_transport_uart_get_main_baud_rate()){ 1289 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1290 } else { 1291 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1292 } 1293 break; 1294 default: 1295 // should not get here 1296 break; 1297 } 1298 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1299 break; 1300 } 1301 log_info("Init script done"); 1302 1303 // Init script download on Broadcom chipsets causes: 1304 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION 1305 || hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA){ 1306 1307 // - baud rate to reset, restore UART baud rate if needed 1308 int need_baud_change = hci_stack->config 1309 && hci_stack->chipset 1310 && hci_stack->chipset->set_baudrate_command 1311 && hci_stack->hci_transport->set_baudrate 1312 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1313 if (need_baud_change) { 1314 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1315 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1316 hci_stack->hci_transport->set_baudrate(baud_rate); 1317 } 1318 1319 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1320 // -> Work around: wait a few milliseconds here. 1321 log_info("BCM delay after init script"); 1322 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1323 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1324 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1325 btstack_run_loop_add_timer(&hci_stack->timeout); 1326 break; 1327 } 1328 } 1329 // otherwise continue 1330 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1331 hci_send_cmd(&hci_read_local_supported_commands); 1332 break; 1333 case HCI_INIT_SET_BD_ADDR: 1334 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1335 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1336 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1337 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1338 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1339 break; 1340 #endif 1341 1342 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1343 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1344 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1345 hci_send_cmd(&hci_read_local_supported_commands); 1346 break; 1347 case HCI_INIT_READ_BD_ADDR: 1348 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1349 hci_send_cmd(&hci_read_bd_addr); 1350 break; 1351 case HCI_INIT_READ_BUFFER_SIZE: 1352 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1353 hci_send_cmd(&hci_read_buffer_size); 1354 break; 1355 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1356 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1357 hci_send_cmd(&hci_read_local_supported_features); 1358 break; 1359 1360 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1361 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1362 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1363 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1364 break; 1365 case HCI_INIT_HOST_BUFFER_SIZE: 1366 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1367 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1368 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1369 break; 1370 #endif 1371 1372 case HCI_INIT_SET_EVENT_MASK: 1373 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1374 if (hci_le_supported()){ 1375 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1376 } else { 1377 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1378 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1379 } 1380 break; 1381 1382 #ifdef ENABLE_CLASSIC 1383 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1384 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1385 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1386 break; 1387 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1388 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1389 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1390 break; 1391 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1392 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1393 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1394 break; 1395 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1396 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1397 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1398 break; 1399 case HCI_INIT_WRITE_LOCAL_NAME: { 1400 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1401 hci_reserve_packet_buffer(); 1402 uint8_t * packet = hci_stack->hci_packet_buffer; 1403 // construct HCI Command and send 1404 uint16_t opcode = hci_write_local_name.opcode; 1405 hci_stack->last_cmd_opcode = opcode; 1406 packet[0] = opcode & 0xff; 1407 packet[1] = opcode >> 8; 1408 packet[2] = DEVICE_NAME_LEN; 1409 memset(&packet[3], 0, DEVICE_NAME_LEN); 1410 memcpy(&packet[3], hci_stack->local_name, strlen(hci_stack->local_name)); 1411 // expand '00:00:00:00:00:00' in name with bd_addr 1412 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1413 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1414 break; 1415 } 1416 case HCI_INIT_WRITE_EIR_DATA: { 1417 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1418 hci_reserve_packet_buffer(); 1419 uint8_t * packet = hci_stack->hci_packet_buffer; 1420 // construct HCI Command and send 1421 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1422 hci_stack->last_cmd_opcode = opcode; 1423 packet[0] = opcode & 0xff; 1424 packet[1] = opcode >> 8; 1425 packet[2] = 1 + 240; 1426 packet[3] = 0; // FEC not required 1427 if (hci_stack->eir_data){ 1428 memcpy(&packet[4], hci_stack->eir_data, 240); 1429 } else { 1430 memset(&packet[4], 0, 240); 1431 int name_len = strlen(hci_stack->local_name); 1432 packet[4] = name_len + 1; 1433 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1434 memcpy(&packet[6], hci_stack->local_name, name_len); 1435 } 1436 // expand '00:00:00:00:00:00' in name with bd_addr 1437 hci_replace_bd_addr_placeholder(&packet[4], 240); 1438 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1439 break; 1440 } 1441 case HCI_INIT_WRITE_INQUIRY_MODE: 1442 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1443 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1444 break; 1445 case HCI_INIT_WRITE_SCAN_ENABLE: 1446 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1447 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1448 break; 1449 // only sent if ENABLE_SCO_OVER_HCI is defined 1450 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1451 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1452 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1453 break; 1454 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1455 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1456 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1457 break; 1458 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1459 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1460 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1461 log_info("BCM: Route SCO data via HCI transport"); 1462 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1463 break; 1464 1465 #endif 1466 #ifdef ENABLE_BLE 1467 // LE INIT 1468 case HCI_INIT_LE_READ_BUFFER_SIZE: 1469 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1470 hci_send_cmd(&hci_le_read_buffer_size); 1471 break; 1472 case HCI_INIT_LE_SET_EVENT_MASK: 1473 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1474 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1475 break; 1476 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1477 // LE Supported Host = 1, Simultaneous Host = 0 1478 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1479 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1480 break; 1481 #endif 1482 1483 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1484 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1485 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1486 hci_send_cmd(&hci_le_read_maximum_data_length); 1487 break; 1488 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1489 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1490 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1491 break; 1492 #endif 1493 1494 #ifdef ENABLE_LE_CENTRAL 1495 case HCI_INIT_READ_WHITE_LIST_SIZE: 1496 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1497 hci_send_cmd(&hci_le_read_white_list_size); 1498 break; 1499 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1500 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1501 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1502 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1503 break; 1504 #endif 1505 default: 1506 return; 1507 } 1508 } 1509 1510 static void hci_init_done(void){ 1511 // done. tell the app 1512 log_info("hci_init_done -> HCI_STATE_WORKING"); 1513 hci_stack->state = HCI_STATE_WORKING; 1514 hci_emit_state(); 1515 hci_run(); 1516 } 1517 1518 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1519 1520 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1521 1522 uint8_t command_completed = 0; 1523 1524 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1525 uint16_t opcode = little_endian_read_16(packet,3); 1526 if (opcode == hci_stack->last_cmd_opcode){ 1527 command_completed = 1; 1528 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1529 } else { 1530 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1531 } 1532 } 1533 1534 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1535 uint8_t status = packet[2]; 1536 uint16_t opcode = little_endian_read_16(packet,4); 1537 if (opcode == hci_stack->last_cmd_opcode){ 1538 if (status){ 1539 command_completed = 1; 1540 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1541 } else { 1542 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1543 } 1544 } else { 1545 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1546 } 1547 } 1548 1549 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1550 1551 // Vendor == CSR 1552 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1553 // TODO: track actual command 1554 command_completed = 1; 1555 } 1556 1557 // Vendor == Toshiba 1558 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1559 // TODO: track actual command 1560 command_completed = 1; 1561 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1562 hci_stack->num_cmd_packets = 1; 1563 } 1564 1565 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1566 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1567 // 1568 // HCI Reset 1569 // Timeout 100 ms 1570 // HCI Reset 1571 // Command Complete Reset 1572 // HCI Read Local Version Information 1573 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1574 // hang... 1575 // 1576 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1577 if (!command_completed 1578 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1579 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1580 1581 uint16_t opcode = little_endian_read_16(packet,3); 1582 if (opcode == hci_reset.opcode){ 1583 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1584 return; 1585 } 1586 } 1587 1588 // CSR & H5 1589 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1590 if (!command_completed 1591 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1592 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1593 1594 uint16_t opcode = little_endian_read_16(packet,3); 1595 if (opcode == hci_reset.opcode){ 1596 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1597 return; 1598 } 1599 } 1600 1601 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1602 // fix: Correct substate and behave as command below 1603 if (command_completed){ 1604 switch (hci_stack->substate){ 1605 case HCI_INIT_SEND_RESET: 1606 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1607 break; 1608 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1609 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1610 break; 1611 default: 1612 break; 1613 } 1614 } 1615 1616 #endif 1617 1618 if (!command_completed) return; 1619 1620 int need_baud_change = 0; 1621 int need_addr_change = 0; 1622 1623 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1624 need_baud_change = hci_stack->config 1625 && hci_stack->chipset 1626 && hci_stack->chipset->set_baudrate_command 1627 && hci_stack->hci_transport->set_baudrate 1628 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1629 1630 need_addr_change = hci_stack->custom_bd_addr_set 1631 && hci_stack->chipset 1632 && hci_stack->chipset->set_bd_addr_command; 1633 #endif 1634 1635 switch(hci_stack->substate){ 1636 1637 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1638 case HCI_INIT_SEND_RESET: 1639 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1640 // fix: just correct substate and behave as command below 1641 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1642 btstack_run_loop_remove_timer(&hci_stack->timeout); 1643 break; 1644 case HCI_INIT_W4_SEND_RESET: 1645 btstack_run_loop_remove_timer(&hci_stack->timeout); 1646 break; 1647 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1648 log_info("Received local name, need baud change %d", need_baud_change); 1649 if (need_baud_change){ 1650 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1651 return; 1652 } 1653 // skip baud change 1654 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1655 return; 1656 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1657 // for STLC2500D, baud rate change already happened. 1658 // for others, baud rate gets changed now 1659 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1660 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1661 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1662 hci_stack->hci_transport->set_baudrate(baud_rate); 1663 } 1664 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1665 return; 1666 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1667 btstack_run_loop_remove_timer(&hci_stack->timeout); 1668 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1669 return; 1670 case HCI_INIT_W4_CUSTOM_INIT: 1671 // repeat custom init 1672 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1673 return; 1674 #else 1675 case HCI_INIT_W4_SEND_RESET: 1676 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1677 return ; 1678 #endif 1679 1680 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1681 if (need_baud_change && 1682 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1683 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1684 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1685 return; 1686 } 1687 if (need_addr_change){ 1688 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1689 return; 1690 } 1691 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1692 return; 1693 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1694 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1695 if (need_baud_change){ 1696 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1697 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1698 hci_stack->hci_transport->set_baudrate(baud_rate); 1699 } 1700 if (need_addr_change){ 1701 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1702 return; 1703 } 1704 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1705 return; 1706 case HCI_INIT_W4_SET_BD_ADDR: 1707 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1708 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1709 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1710 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1711 return; 1712 } 1713 // skipping st warm boot 1714 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1715 return; 1716 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1717 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1718 return; 1719 #endif 1720 case HCI_INIT_W4_READ_BD_ADDR: 1721 // only read buffer size if supported 1722 if (hci_stack->local_supported_commands[0] & 0x01) { 1723 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1724 return; 1725 } 1726 // skipping read buffer size 1727 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1728 return; 1729 case HCI_INIT_W4_SET_EVENT_MASK: 1730 // skip Classic init commands for LE only chipsets 1731 if (!hci_classic_supported()){ 1732 #ifdef ENABLE_BLE 1733 if (hci_le_supported()){ 1734 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1735 return; 1736 } 1737 #endif 1738 log_error("Neither BR/EDR nor LE supported"); 1739 hci_init_done(); 1740 return; 1741 } 1742 if (!gap_ssp_supported()){ 1743 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1744 return; 1745 } 1746 break; 1747 #ifdef ENABLE_BLE 1748 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1749 // skip write le host if not supported (e.g. on LE only EM9301) 1750 if (hci_stack->local_supported_commands[0] & 0x02) break; 1751 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1752 return; 1753 1754 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1755 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1756 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1757 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1758 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1759 return; 1760 } 1761 // explicit fall through to reduce repetitions 1762 1763 #ifdef ENABLE_LE_CENTRAL 1764 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1765 #else 1766 hci_init_done(); 1767 #endif 1768 return; 1769 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1770 1771 #endif /* ENABLE_BLE */ 1772 1773 #ifdef ENABLE_SCO_OVER_HCI 1774 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1775 // skip write synchronous flow control if not supported 1776 if (hci_stack->local_supported_commands[0] & 0x04) break; 1777 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1778 // explicit fall through to reduce repetitions 1779 1780 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1781 // skip write default erroneous data reporting if not supported 1782 if (hci_stack->local_supported_commands[0] & 0x08) break; 1783 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1784 // explicit fall through to reduce repetitions 1785 1786 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1787 // skip bcm set sco pcm config on non-Broadcom chipsets 1788 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1789 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1790 // explicit fall through to reduce repetitions 1791 1792 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1793 if (!hci_le_supported()){ 1794 // SKIP LE init for Classic only configuration 1795 hci_init_done(); 1796 return; 1797 } 1798 break; 1799 1800 #else /* !ENABLE_SCO_OVER_HCI */ 1801 1802 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1803 #ifdef ENABLE_BLE 1804 if (hci_le_supported()){ 1805 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1806 return; 1807 } 1808 #endif 1809 // SKIP LE init for Classic only configuration 1810 hci_init_done(); 1811 return; 1812 #endif /* ENABLE_SCO_OVER_HCI */ 1813 1814 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1815 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1816 // Response to command before init done state -> init done 1817 case (HCI_INIT_DONE-1): 1818 hci_init_done(); 1819 return; 1820 #endif 1821 1822 default: 1823 break; 1824 } 1825 hci_initializing_next_state(); 1826 } 1827 1828 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1829 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1830 bd_addr_t bd_address; 1831 memcpy(&bd_address, conn->address, 6); 1832 1833 #ifdef ENABLE_CLASSIC 1834 // cache needed data 1835 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1836 #endif 1837 1838 // connection failed, remove entry 1839 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1840 btstack_memory_hci_connection_free( conn ); 1841 1842 #ifdef ENABLE_CLASSIC 1843 // notify client if dedicated bonding 1844 if (notify_dedicated_bonding_failed){ 1845 log_info("hci notify_dedicated_bonding_failed"); 1846 hci_emit_dedicated_bonding_result(bd_address, status); 1847 } 1848 1849 // if authentication error, also delete link key 1850 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1851 gap_drop_link_key_for_bd_addr(bd_address); 1852 } 1853 #endif 1854 } 1855 1856 static void event_handler(uint8_t *packet, int size){ 1857 1858 uint16_t event_length = packet[1]; 1859 1860 // assert packet is complete 1861 if (size != event_length + 2){ 1862 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1863 return; 1864 } 1865 1866 bd_addr_t addr; 1867 bd_addr_type_t addr_type; 1868 hci_con_handle_t handle; 1869 hci_connection_t * conn; 1870 int i; 1871 int create_connection_cmd; 1872 1873 #ifdef ENABLE_CLASSIC 1874 uint8_t link_type; 1875 #endif 1876 1877 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1878 1879 switch (hci_event_packet_get_type(packet)) { 1880 1881 case HCI_EVENT_COMMAND_COMPLETE: 1882 // get num cmd packets - limit to 1 to reduce complexity 1883 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1884 1885 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1886 if (packet[5]) break; 1887 // terminate, name 248 chars 1888 packet[6+248] = 0; 1889 log_info("local name: %s", &packet[6]); 1890 } 1891 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1892 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1893 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1894 uint16_t acl_len = little_endian_read_16(packet, 6); 1895 uint16_t sco_len = packet[8]; 1896 1897 // determine usable ACL/SCO payload size 1898 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1899 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1900 1901 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1902 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1903 1904 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1905 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1906 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1907 } 1908 } 1909 #ifdef ENABLE_BLE 1910 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1911 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1912 hci_stack->le_acl_packets_total_num = packet[8]; 1913 // determine usable ACL payload size 1914 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1915 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1916 } 1917 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1918 } 1919 #endif 1920 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1921 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1922 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1923 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1924 log_info("hci_le_read_maximum_data_length: tx octets %u, tx time %u us", hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1925 } 1926 #endif 1927 #ifdef ENABLE_LE_CENTRAL 1928 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1929 hci_stack->le_whitelist_capacity = packet[6]; 1930 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1931 } 1932 #endif 1933 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1934 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1935 hci_stack->local_bd_addr); 1936 log_info("Local Address, Status: 0x%02x: Addr: %s", 1937 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1938 #ifdef ENABLE_CLASSIC 1939 if (hci_stack->link_key_db){ 1940 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1941 } 1942 #endif 1943 } 1944 #ifdef ENABLE_CLASSIC 1945 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1946 hci_emit_discoverable_enabled(hci_stack->discoverable); 1947 } 1948 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1949 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1950 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1951 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1952 hci_emit_event(event, sizeof(event), 1); 1953 } 1954 } 1955 #endif 1956 1957 // Note: HCI init checks 1958 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1959 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1960 1961 #ifdef ENABLE_CLASSIC 1962 // determine usable ACL packet types based on host buffer size and supported features 1963 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1964 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1965 #endif 1966 // Classic/LE 1967 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1968 } 1969 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1970 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1971 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1972 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1973 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1974 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1975 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1976 } 1977 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1978 hci_stack->local_supported_commands[0] = 1979 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 / Read Buffer Size 1980 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 1981 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 1982 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 1983 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 1984 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2 | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 1985 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1; // bit 6 = Octet 35, bit 5 / LE Set Default PHY 1986 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1987 } 1988 #ifdef ENABLE_CLASSIC 1989 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1990 if (packet[5] == 0){ 1991 hci_stack->synchronous_flow_control_enabled = 1; 1992 } 1993 } 1994 #endif 1995 break; 1996 1997 case HCI_EVENT_COMMAND_STATUS: 1998 // get num cmd packets - limit to 1 to reduce complexity 1999 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2000 2001 // check command status to detected failed outgoing connections 2002 create_connection_cmd = 0; 2003 #ifdef ENABLE_CLASSIC 2004 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2005 create_connection_cmd = 1; 2006 } 2007 #endif 2008 #ifdef ENABLE_LE_CENTRAL 2009 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2010 create_connection_cmd = 1; 2011 } 2012 #endif 2013 if (create_connection_cmd) { 2014 uint8_t status = hci_event_command_status_get_status(packet); 2015 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2016 log_info("command status (create connection), status %x, connection %p, addr %s, type %x", status, conn, bd_addr_to_str(hci_stack->outgoing_addr), hci_stack->outgoing_addr_type); 2017 2018 // reset outgoing address info 2019 memset(hci_stack->outgoing_addr, 0, 6); 2020 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2021 2022 // error => outgoing connection failed 2023 if ((conn != NULL) && (status != 0)){ 2024 hci_handle_connection_failed(conn, status); 2025 } 2026 } 2027 break; 2028 2029 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2030 int offset = 3; 2031 for (i=0; i<packet[2];i++){ 2032 handle = little_endian_read_16(packet, offset) & 0x0fff; 2033 offset += 2; 2034 uint16_t num_packets = little_endian_read_16(packet, offset); 2035 offset += 2; 2036 2037 conn = hci_connection_for_handle(handle); 2038 if (!conn){ 2039 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2040 continue; 2041 } 2042 2043 if (conn->num_packets_sent >= num_packets){ 2044 conn->num_packets_sent -= num_packets; 2045 } else { 2046 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2047 conn->num_packets_sent = 0; 2048 } 2049 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2050 2051 #ifdef ENABLE_CLASSIC 2052 // For SCO, we do the can_send_now_check here 2053 hci_notify_if_sco_can_send_now(); 2054 #endif 2055 } 2056 break; 2057 } 2058 2059 #ifdef ENABLE_CLASSIC 2060 case HCI_EVENT_INQUIRY_COMPLETE: 2061 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2062 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2063 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2064 hci_emit_event(event, sizeof(event), 1); 2065 } 2066 break; 2067 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2068 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2069 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2070 } 2071 break; 2072 case HCI_EVENT_CONNECTION_REQUEST: 2073 reverse_bd_addr(&packet[2], addr); 2074 // TODO: eval COD 8-10 2075 link_type = packet[11]; 2076 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2077 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 2078 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2079 if (!conn) { 2080 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2081 } 2082 if (!conn) { 2083 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2084 hci_stack->decline_reason = 0x0d; 2085 bd_addr_copy(hci_stack->decline_addr, addr); 2086 break; 2087 } 2088 conn->role = HCI_ROLE_SLAVE; 2089 conn->state = RECEIVED_CONNECTION_REQUEST; 2090 // store info about eSCO 2091 if (link_type == 0x02){ 2092 conn->remote_supported_feature_eSCO = 1; 2093 } 2094 hci_run(); 2095 break; 2096 2097 case HCI_EVENT_CONNECTION_COMPLETE: 2098 // Connection management 2099 reverse_bd_addr(&packet[5], addr); 2100 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2101 addr_type = BD_ADDR_TYPE_CLASSIC; 2102 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2103 if (conn) { 2104 if (!packet[2]){ 2105 conn->state = OPEN; 2106 conn->con_handle = little_endian_read_16(packet, 3); 2107 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2108 2109 // restart timer 2110 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2111 btstack_run_loop_add_timer(&conn->timeout); 2112 2113 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2114 2115 hci_emit_nr_connections_changed(); 2116 } else { 2117 // connection failed 2118 hci_handle_connection_failed(conn, packet[2]); 2119 } 2120 } 2121 break; 2122 2123 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2124 reverse_bd_addr(&packet[5], addr); 2125 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2126 if (packet[2]){ 2127 // connection failed 2128 break; 2129 } 2130 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2131 if (!conn) { 2132 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2133 } 2134 if (!conn) { 2135 break; 2136 } 2137 conn->state = OPEN; 2138 conn->con_handle = little_endian_read_16(packet, 3); 2139 2140 #ifdef ENABLE_SCO_OVER_HCI 2141 // update SCO 2142 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2143 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2144 } 2145 #endif 2146 break; 2147 2148 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2149 handle = little_endian_read_16(packet, 3); 2150 conn = hci_connection_for_handle(handle); 2151 if (!conn) break; 2152 if (!packet[2]){ 2153 uint8_t * features = &packet[5]; 2154 if (features[6] & (1 << 3)){ 2155 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2156 } 2157 if (features[3] & (1<<7)){ 2158 conn->remote_supported_feature_eSCO = 1; 2159 } 2160 } 2161 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2162 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2163 if (conn->bonding_flags & BONDING_DEDICATED){ 2164 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2165 } 2166 break; 2167 2168 case HCI_EVENT_LINK_KEY_REQUEST: 2169 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2170 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2171 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2172 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2173 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2174 hci_run(); 2175 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2176 return; 2177 2178 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2179 reverse_bd_addr(&packet[2], addr); 2180 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2181 if (!conn) break; 2182 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2183 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2184 // Change Connection Encryption keeps link key type 2185 if (link_key_type != CHANGED_COMBINATION_KEY){ 2186 conn->link_key_type = link_key_type; 2187 } 2188 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2189 // still forward event to allow dismiss of pairing dialog 2190 break; 2191 } 2192 2193 case HCI_EVENT_PIN_CODE_REQUEST: 2194 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2195 // non-bondable mode: pin code negative reply will be sent 2196 if (!hci_stack->bondable){ 2197 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2198 hci_run(); 2199 return; 2200 } 2201 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2202 if (!hci_stack->link_key_db) break; 2203 hci_event_pin_code_request_get_bd_addr(packet, addr); 2204 hci_stack->link_key_db->delete_link_key(addr); 2205 break; 2206 2207 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2208 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2209 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2210 break; 2211 2212 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2213 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2214 if (!hci_stack->ssp_auto_accept) break; 2215 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2216 break; 2217 2218 case HCI_EVENT_USER_PASSKEY_REQUEST: 2219 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2220 if (!hci_stack->ssp_auto_accept) break; 2221 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2222 break; 2223 case HCI_EVENT_MODE_CHANGE: 2224 handle = hci_event_mode_change_get_handle(packet); 2225 conn = hci_connection_for_handle(handle); 2226 if (!conn) break; 2227 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2228 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2229 break; 2230 #endif 2231 2232 case HCI_EVENT_ENCRYPTION_CHANGE: 2233 handle = little_endian_read_16(packet, 3); 2234 conn = hci_connection_for_handle(handle); 2235 if (!conn) break; 2236 if (packet[2] == 0) { 2237 if (packet[5]){ 2238 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2239 } else { 2240 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2241 } 2242 } 2243 #ifdef ENABLE_CLASSIC 2244 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2245 #endif 2246 break; 2247 2248 #ifdef ENABLE_CLASSIC 2249 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2250 handle = little_endian_read_16(packet, 3); 2251 conn = hci_connection_for_handle(handle); 2252 if (!conn) break; 2253 2254 // dedicated bonding: send result and disconnect 2255 if (conn->bonding_flags & BONDING_DEDICATED){ 2256 conn->bonding_flags &= ~BONDING_DEDICATED; 2257 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2258 conn->bonding_status = packet[2]; 2259 break; 2260 } 2261 2262 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2263 // link key sufficient for requested security 2264 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2265 break; 2266 } 2267 // not enough 2268 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2269 break; 2270 #endif 2271 2272 // HCI_EVENT_DISCONNECTION_COMPLETE 2273 // has been split, to first notify stack before shutting connection down 2274 // see end of function, too. 2275 case HCI_EVENT_DISCONNECTION_COMPLETE: 2276 if (packet[2]) break; // status != 0 2277 handle = little_endian_read_16(packet, 3); 2278 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2279 if (hci_stack->acl_fragmentation_total_size > 0) { 2280 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2281 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2282 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2283 hci_stack->acl_fragmentation_total_size = 0; 2284 hci_stack->acl_fragmentation_pos = 0; 2285 if (release_buffer){ 2286 hci_release_packet_buffer(); 2287 } 2288 } 2289 } 2290 2291 // re-enable advertisements for le connections if active 2292 conn = hci_connection_for_handle(handle); 2293 if (!conn) break; 2294 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2295 #ifdef ENABLE_BLE 2296 #ifdef ENABLE_LE_PERIPHERAL 2297 if (hci_is_le_connection(conn)){ 2298 hci_reenable_advertisements_if_needed(); 2299 } 2300 #endif 2301 #endif 2302 break; 2303 2304 case HCI_EVENT_HARDWARE_ERROR: 2305 log_error("Hardware Error: 0x%02x", packet[2]); 2306 if (hci_stack->hardware_error_callback){ 2307 (*hci_stack->hardware_error_callback)(packet[2]); 2308 } else { 2309 // if no special requests, just reboot stack 2310 hci_power_control_off(); 2311 hci_power_control_on(); 2312 } 2313 break; 2314 2315 #ifdef ENABLE_CLASSIC 2316 case HCI_EVENT_ROLE_CHANGE: 2317 if (packet[2]) break; // status != 0 2318 reverse_bd_addr(&packet[3], addr); 2319 addr_type = BD_ADDR_TYPE_CLASSIC; 2320 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2321 if (!conn) break; 2322 conn->role = packet[9]; 2323 break; 2324 #endif 2325 2326 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2327 // release packet buffer only for asynchronous transport and if there are not further fragements 2328 if (hci_transport_synchronous()) { 2329 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2330 return; // instead of break: to avoid re-entering hci_run() 2331 } 2332 hci_stack->acl_fragmentation_tx_active = 0; 2333 if (hci_stack->acl_fragmentation_total_size) break; 2334 hci_release_packet_buffer(); 2335 2336 // L2CAP receives this event via the hci_emit_event below 2337 2338 #ifdef ENABLE_CLASSIC 2339 // For SCO, we do the can_send_now_check here 2340 hci_notify_if_sco_can_send_now(); 2341 #endif 2342 break; 2343 2344 #ifdef ENABLE_CLASSIC 2345 case HCI_EVENT_SCO_CAN_SEND_NOW: 2346 // For SCO, we do the can_send_now_check here 2347 hci_notify_if_sco_can_send_now(); 2348 return; 2349 2350 // explode inquriy results for easier consumption 2351 case HCI_EVENT_INQUIRY_RESULT: 2352 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2353 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2354 gap_inquiry_explode(packet); 2355 break; 2356 #endif 2357 2358 #ifdef ENABLE_BLE 2359 case HCI_EVENT_LE_META: 2360 switch (packet[2]){ 2361 #ifdef ENABLE_LE_CENTRAL 2362 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2363 // log_info("advertising report received"); 2364 if (!hci_stack->le_scanning_enabled) break; 2365 le_handle_advertisement_report(packet, size); 2366 break; 2367 #endif 2368 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2369 // Connection management 2370 reverse_bd_addr(&packet[8], addr); 2371 addr_type = (bd_addr_type_t)packet[7]; 2372 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2373 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2374 2375 #ifdef ENABLE_LE_CENTRAL 2376 // if auto-connect, remove from whitelist in both roles 2377 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2378 hci_remove_from_whitelist(addr_type, addr); 2379 } 2380 // handle error: error is reported only to the initiator -> outgoing connection 2381 if (packet[3]){ 2382 2383 // handle cancelled outgoing connection 2384 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2385 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2386 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2387 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2388 conn = gap_get_outgoing_connection(); 2389 } 2390 2391 // outgoing connection establishment is done 2392 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2393 // remove entry 2394 if (conn){ 2395 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2396 btstack_memory_hci_connection_free( conn ); 2397 } 2398 break; 2399 } 2400 #endif 2401 // on success, both hosts receive connection complete event 2402 if (packet[6] == HCI_ROLE_MASTER){ 2403 #ifdef ENABLE_LE_CENTRAL 2404 // if we're master, it was an outgoing connection and we're done with it 2405 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2406 #endif 2407 } else { 2408 #ifdef ENABLE_LE_PERIPHERAL 2409 // if we're slave, it was an incoming connection, advertisements have stopped 2410 hci_stack->le_advertisements_active = 0; 2411 #endif 2412 } 2413 // LE connections are auto-accepted, so just create a connection if there isn't one already 2414 if (!conn){ 2415 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2416 } 2417 // no memory, sorry. 2418 if (!conn){ 2419 break; 2420 } 2421 2422 conn->state = OPEN; 2423 conn->role = packet[6]; 2424 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2425 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2426 2427 #ifdef ENABLE_LE_PERIPHERAL 2428 if (packet[6] == HCI_ROLE_SLAVE){ 2429 hci_reenable_advertisements_if_needed(); 2430 } 2431 #endif 2432 2433 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2434 2435 // restart timer 2436 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2437 // btstack_run_loop_add_timer(&conn->timeout); 2438 2439 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2440 2441 hci_emit_nr_connections_changed(); 2442 break; 2443 2444 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2445 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2446 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2447 conn = hci_connection_for_handle(handle); 2448 if (!conn) break; 2449 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2450 break; 2451 2452 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2453 // connection 2454 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2455 conn = hci_connection_for_handle(handle); 2456 if (conn) { 2457 // read arguments 2458 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2459 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2460 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2461 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2462 2463 // validate against current connection parameter range 2464 le_connection_parameter_range_t existing_range; 2465 gap_get_connection_parameter_range(&existing_range); 2466 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2467 if (update_parameter){ 2468 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2469 conn->le_conn_interval_min = le_conn_interval_min; 2470 conn->le_conn_interval_max = le_conn_interval_max; 2471 conn->le_conn_latency = le_conn_latency; 2472 conn->le_supervision_timeout = le_supervision_timeout; 2473 } else { 2474 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2475 } 2476 } 2477 break; 2478 default: 2479 break; 2480 } 2481 break; 2482 #endif 2483 case HCI_EVENT_VENDOR_SPECIFIC: 2484 // Vendor specific commands often create vendor specific event instead of num completed packets 2485 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2486 switch (hci_stack->manufacturer){ 2487 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2488 hci_stack->num_cmd_packets = 1; 2489 break; 2490 default: 2491 break; 2492 } 2493 break; 2494 default: 2495 break; 2496 } 2497 2498 // handle BT initialization 2499 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2500 hci_initializing_event_handler(packet, size); 2501 } 2502 2503 // help with BT sleep 2504 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2505 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2506 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2507 hci_initializing_next_state(); 2508 } 2509 2510 // notify upper stack 2511 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2512 2513 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2514 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2515 if (!packet[2]){ 2516 handle = little_endian_read_16(packet, 3); 2517 hci_connection_t * aConn = hci_connection_for_handle(handle); 2518 if (aConn) { 2519 uint8_t status = aConn->bonding_status; 2520 uint16_t flags = aConn->bonding_flags; 2521 bd_addr_t bd_address; 2522 memcpy(&bd_address, aConn->address, 6); 2523 hci_shutdown_connection(aConn); 2524 // connection struct is gone, don't access anymore 2525 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2526 hci_emit_dedicated_bonding_result(bd_address, status); 2527 } 2528 } 2529 } 2530 } 2531 2532 // execute main loop 2533 hci_run(); 2534 } 2535 2536 #ifdef ENABLE_CLASSIC 2537 static void sco_handler(uint8_t * packet, uint16_t size){ 2538 // lookup connection struct 2539 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2540 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2541 if (!conn) return; 2542 2543 int notify_sco = 0; 2544 2545 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2546 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2547 if (size == 83 && ((hci_stack->sco_voice_setting & 0x03) == 0x03)){ 2548 packet[2] = 0x3c; 2549 memmove(&packet[3], &packet[23], 63); 2550 size = 63; 2551 } 2552 } 2553 2554 // treat received SCO packets as indicator of successfully sent packet, if flow control is not explicite 2555 log_info("sco flow %u, handle 0x%04x, packets sent %u, bytes send %u", hci_stack->synchronous_flow_control_enabled, (int) con_handle, conn->num_packets_sent, conn->num_sco_bytes_sent); 2556 if (hci_stack->synchronous_flow_control_enabled == 0){ 2557 uint16_t sco_payload_len = size - 3; 2558 if (conn->num_sco_bytes_sent >= sco_payload_len){ 2559 conn->num_sco_bytes_sent -= sco_payload_len; 2560 } else { 2561 conn->num_sco_bytes_sent = 0; 2562 } 2563 notify_sco = 1; 2564 } 2565 // deliver to app 2566 if (hci_stack->sco_packet_handler) { 2567 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2568 } 2569 2570 // notify app if it can send again 2571 if (notify_sco){ 2572 hci_notify_if_sco_can_send_now(); 2573 } 2574 2575 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2576 conn->num_packets_completed++; 2577 hci_stack->host_completed_packets = 1; 2578 hci_run(); 2579 #endif 2580 } 2581 #endif 2582 2583 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2584 hci_dump_packet(packet_type, 1, packet, size); 2585 switch (packet_type) { 2586 case HCI_EVENT_PACKET: 2587 event_handler(packet, size); 2588 break; 2589 case HCI_ACL_DATA_PACKET: 2590 acl_handler(packet, size); 2591 break; 2592 #ifdef ENABLE_CLASSIC 2593 case HCI_SCO_DATA_PACKET: 2594 sco_handler(packet, size); 2595 break; 2596 #endif 2597 default: 2598 break; 2599 } 2600 } 2601 2602 /** 2603 * @brief Add event packet handler. 2604 */ 2605 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2606 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2607 } 2608 2609 2610 /** Register HCI packet handlers */ 2611 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2612 hci_stack->acl_packet_handler = handler; 2613 } 2614 2615 #ifdef ENABLE_CLASSIC 2616 /** 2617 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2618 */ 2619 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2620 hci_stack->sco_packet_handler = handler; 2621 } 2622 #endif 2623 2624 static void hci_state_reset(void){ 2625 // no connections yet 2626 hci_stack->connections = NULL; 2627 2628 // keep discoverable/connectable as this has been requested by the client(s) 2629 // hci_stack->discoverable = 0; 2630 // hci_stack->connectable = 0; 2631 // hci_stack->bondable = 1; 2632 // hci_stack->own_addr_type = 0; 2633 2634 // buffer is free 2635 hci_stack->hci_packet_buffer_reserved = 0; 2636 2637 // no pending cmds 2638 hci_stack->decline_reason = 0; 2639 hci_stack->new_scan_enable_value = 0xff; 2640 2641 // LE 2642 #ifdef ENABLE_BLE 2643 memset(hci_stack->le_random_address, 0, 6); 2644 hci_stack->le_random_address_set = 0; 2645 #endif 2646 #ifdef ENABLE_LE_CENTRAL 2647 hci_stack->le_scanning_active = 0; 2648 hci_stack->le_scan_type = 0xff; 2649 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2650 hci_stack->le_whitelist = 0; 2651 hci_stack->le_whitelist_capacity = 0; 2652 #endif 2653 } 2654 2655 #ifdef ENABLE_CLASSIC 2656 /** 2657 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2658 */ 2659 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2660 // store and open remote device db 2661 hci_stack->link_key_db = link_key_db; 2662 if (hci_stack->link_key_db) { 2663 hci_stack->link_key_db->open(); 2664 } 2665 } 2666 #endif 2667 2668 void hci_init(const hci_transport_t *transport, const void *config){ 2669 2670 #ifdef HAVE_MALLOC 2671 if (!hci_stack) { 2672 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2673 } 2674 #else 2675 hci_stack = &hci_stack_static; 2676 #endif 2677 memset(hci_stack, 0, sizeof(hci_stack_t)); 2678 2679 // reference to use transport layer implementation 2680 hci_stack->hci_transport = transport; 2681 2682 // reference to used config 2683 hci_stack->config = config; 2684 2685 // setup pointer for outgoing packet buffer 2686 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2687 2688 // max acl payload size defined in config.h 2689 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2690 2691 // register packet handlers with transport 2692 transport->register_packet_handler(&packet_handler); 2693 2694 hci_stack->state = HCI_STATE_OFF; 2695 2696 // class of device 2697 hci_stack->class_of_device = 0x007a020c; // Smartphone 2698 2699 // bondable by default 2700 hci_stack->bondable = 1; 2701 2702 #ifdef ENABLE_CLASSIC 2703 // classic name 2704 hci_stack->local_name = default_classic_name; 2705 2706 // Master slave policy 2707 hci_stack->master_slave_policy = 1; 2708 #endif 2709 2710 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2711 hci_stack->ssp_enable = 1; 2712 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2713 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2714 hci_stack->ssp_auto_accept = 1; 2715 2716 // voice setting - signed 16 bit pcm data with CVSD over the air 2717 hci_stack->sco_voice_setting = 0x60; 2718 2719 #ifdef ENABLE_LE_CENTRAL 2720 // connection parameter to use for outgoing connections 2721 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2722 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2723 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2724 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2725 hci_stack->le_connection_latency = 4; // 4 2726 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2727 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2728 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2729 #endif 2730 2731 #ifdef ENABLE_LE_PERIPHERAL 2732 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2733 #endif 2734 2735 // connection parameter range used to answer connection parameter update requests in l2cap 2736 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2737 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2738 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2739 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2740 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2741 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2742 2743 hci_state_reset(); 2744 } 2745 2746 /** 2747 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2748 */ 2749 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2750 hci_stack->chipset = chipset_driver; 2751 2752 // reset chipset driver - init is also called on power_up 2753 if (hci_stack->chipset && hci_stack->chipset->init){ 2754 hci_stack->chipset->init(hci_stack->config); 2755 } 2756 } 2757 2758 /** 2759 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2760 */ 2761 void hci_set_control(const btstack_control_t *hardware_control){ 2762 // references to used control implementation 2763 hci_stack->control = hardware_control; 2764 // init with transport config 2765 hardware_control->init(hci_stack->config); 2766 } 2767 2768 void hci_close(void){ 2769 // close remote device db 2770 if (hci_stack->link_key_db) { 2771 hci_stack->link_key_db->close(); 2772 } 2773 2774 btstack_linked_list_iterator_t lit; 2775 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2776 while (btstack_linked_list_iterator_has_next(&lit)){ 2777 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2778 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2779 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2780 hci_shutdown_connection(connection); 2781 } 2782 2783 hci_power_control(HCI_POWER_OFF); 2784 2785 #ifdef HAVE_MALLOC 2786 free(hci_stack); 2787 #endif 2788 hci_stack = NULL; 2789 } 2790 2791 #ifdef ENABLE_CLASSIC 2792 void gap_set_class_of_device(uint32_t class_of_device){ 2793 hci_stack->class_of_device = class_of_device; 2794 } 2795 2796 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 2797 hci_stack->default_link_policy_settings = default_link_policy_settings; 2798 } 2799 2800 void hci_disable_l2cap_timeout_check(void){ 2801 disable_l2cap_timeouts = 1; 2802 } 2803 #endif 2804 2805 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2806 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2807 void hci_set_bd_addr(bd_addr_t addr){ 2808 memcpy(hci_stack->custom_bd_addr, addr, 6); 2809 hci_stack->custom_bd_addr_set = 1; 2810 } 2811 #endif 2812 2813 // State-Module-Driver overview 2814 // state module low-level 2815 // HCI_STATE_OFF off close 2816 // HCI_STATE_INITIALIZING, on open 2817 // HCI_STATE_WORKING, on open 2818 // HCI_STATE_HALTING, on open 2819 // HCI_STATE_SLEEPING, off/sleep close 2820 // HCI_STATE_FALLING_ASLEEP on open 2821 2822 static int hci_power_control_on(void){ 2823 2824 // power on 2825 int err = 0; 2826 if (hci_stack->control && hci_stack->control->on){ 2827 err = (*hci_stack->control->on)(); 2828 } 2829 if (err){ 2830 log_error( "POWER_ON failed"); 2831 hci_emit_hci_open_failed(); 2832 return err; 2833 } 2834 2835 // int chipset driver 2836 if (hci_stack->chipset && hci_stack->chipset->init){ 2837 hci_stack->chipset->init(hci_stack->config); 2838 } 2839 2840 // init transport 2841 if (hci_stack->hci_transport->init){ 2842 hci_stack->hci_transport->init(hci_stack->config); 2843 } 2844 2845 // open transport 2846 err = hci_stack->hci_transport->open(); 2847 if (err){ 2848 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2849 if (hci_stack->control && hci_stack->control->off){ 2850 (*hci_stack->control->off)(); 2851 } 2852 hci_emit_hci_open_failed(); 2853 return err; 2854 } 2855 return 0; 2856 } 2857 2858 static void hci_power_control_off(void){ 2859 2860 log_info("hci_power_control_off"); 2861 2862 // close low-level device 2863 hci_stack->hci_transport->close(); 2864 2865 log_info("hci_power_control_off - hci_transport closed"); 2866 2867 // power off 2868 if (hci_stack->control && hci_stack->control->off){ 2869 (*hci_stack->control->off)(); 2870 } 2871 2872 log_info("hci_power_control_off - control closed"); 2873 2874 hci_stack->state = HCI_STATE_OFF; 2875 } 2876 2877 static void hci_power_control_sleep(void){ 2878 2879 log_info("hci_power_control_sleep"); 2880 2881 #if 0 2882 // don't close serial port during sleep 2883 2884 // close low-level device 2885 hci_stack->hci_transport->close(hci_stack->config); 2886 #endif 2887 2888 // sleep mode 2889 if (hci_stack->control && hci_stack->control->sleep){ 2890 (*hci_stack->control->sleep)(); 2891 } 2892 2893 hci_stack->state = HCI_STATE_SLEEPING; 2894 } 2895 2896 static int hci_power_control_wake(void){ 2897 2898 log_info("hci_power_control_wake"); 2899 2900 // wake on 2901 if (hci_stack->control && hci_stack->control->wake){ 2902 (*hci_stack->control->wake)(); 2903 } 2904 2905 #if 0 2906 // open low-level device 2907 int err = hci_stack->hci_transport->open(hci_stack->config); 2908 if (err){ 2909 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2910 if (hci_stack->control && hci_stack->control->off){ 2911 (*hci_stack->control->off)(); 2912 } 2913 hci_emit_hci_open_failed(); 2914 return err; 2915 } 2916 #endif 2917 2918 return 0; 2919 } 2920 2921 static void hci_power_transition_to_initializing(void){ 2922 // set up state machine 2923 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2924 hci_stack->hci_packet_buffer_reserved = 0; 2925 hci_stack->state = HCI_STATE_INITIALIZING; 2926 hci_stack->substate = HCI_INIT_SEND_RESET; 2927 } 2928 2929 int hci_power_control(HCI_POWER_MODE power_mode){ 2930 2931 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2932 2933 int err = 0; 2934 switch (hci_stack->state){ 2935 2936 case HCI_STATE_OFF: 2937 switch (power_mode){ 2938 case HCI_POWER_ON: 2939 err = hci_power_control_on(); 2940 if (err) { 2941 log_error("hci_power_control_on() error %d", err); 2942 return err; 2943 } 2944 hci_power_transition_to_initializing(); 2945 break; 2946 case HCI_POWER_OFF: 2947 // do nothing 2948 break; 2949 case HCI_POWER_SLEEP: 2950 // do nothing (with SLEEP == OFF) 2951 break; 2952 } 2953 break; 2954 2955 case HCI_STATE_INITIALIZING: 2956 switch (power_mode){ 2957 case HCI_POWER_ON: 2958 // do nothing 2959 break; 2960 case HCI_POWER_OFF: 2961 // no connections yet, just turn it off 2962 hci_power_control_off(); 2963 break; 2964 case HCI_POWER_SLEEP: 2965 // no connections yet, just turn it off 2966 hci_power_control_sleep(); 2967 break; 2968 } 2969 break; 2970 2971 case HCI_STATE_WORKING: 2972 switch (power_mode){ 2973 case HCI_POWER_ON: 2974 // do nothing 2975 break; 2976 case HCI_POWER_OFF: 2977 // see hci_run 2978 hci_stack->state = HCI_STATE_HALTING; 2979 break; 2980 case HCI_POWER_SLEEP: 2981 // see hci_run 2982 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2983 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2984 break; 2985 } 2986 break; 2987 2988 case HCI_STATE_HALTING: 2989 switch (power_mode){ 2990 case HCI_POWER_ON: 2991 hci_power_transition_to_initializing(); 2992 break; 2993 case HCI_POWER_OFF: 2994 // do nothing 2995 break; 2996 case HCI_POWER_SLEEP: 2997 // see hci_run 2998 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2999 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3000 break; 3001 } 3002 break; 3003 3004 case HCI_STATE_FALLING_ASLEEP: 3005 switch (power_mode){ 3006 case HCI_POWER_ON: 3007 3008 #ifdef HAVE_PLATFORM_IPHONE_OS 3009 // nothing to do, if H4 supports power management 3010 if (btstack_control_iphone_power_management_enabled()){ 3011 hci_stack->state = HCI_STATE_INITIALIZING; 3012 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3013 break; 3014 } 3015 #endif 3016 hci_power_transition_to_initializing(); 3017 break; 3018 case HCI_POWER_OFF: 3019 // see hci_run 3020 hci_stack->state = HCI_STATE_HALTING; 3021 break; 3022 case HCI_POWER_SLEEP: 3023 // do nothing 3024 break; 3025 } 3026 break; 3027 3028 case HCI_STATE_SLEEPING: 3029 switch (power_mode){ 3030 case HCI_POWER_ON: 3031 3032 #ifdef HAVE_PLATFORM_IPHONE_OS 3033 // nothing to do, if H4 supports power management 3034 if (btstack_control_iphone_power_management_enabled()){ 3035 hci_stack->state = HCI_STATE_INITIALIZING; 3036 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3037 hci_update_scan_enable(); 3038 break; 3039 } 3040 #endif 3041 err = hci_power_control_wake(); 3042 if (err) return err; 3043 hci_power_transition_to_initializing(); 3044 break; 3045 case HCI_POWER_OFF: 3046 hci_stack->state = HCI_STATE_HALTING; 3047 break; 3048 case HCI_POWER_SLEEP: 3049 // do nothing 3050 break; 3051 } 3052 break; 3053 } 3054 3055 // create internal event 3056 hci_emit_state(); 3057 3058 // trigger next/first action 3059 hci_run(); 3060 3061 return 0; 3062 } 3063 3064 3065 #ifdef ENABLE_CLASSIC 3066 3067 static void hci_update_scan_enable(void){ 3068 // 2 = page scan, 1 = inq scan 3069 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 3070 hci_run(); 3071 } 3072 3073 void gap_discoverable_control(uint8_t enable){ 3074 if (enable) enable = 1; // normalize argument 3075 3076 if (hci_stack->discoverable == enable){ 3077 hci_emit_discoverable_enabled(hci_stack->discoverable); 3078 return; 3079 } 3080 3081 hci_stack->discoverable = enable; 3082 hci_update_scan_enable(); 3083 } 3084 3085 void gap_connectable_control(uint8_t enable){ 3086 if (enable) enable = 1; // normalize argument 3087 3088 // don't emit event 3089 if (hci_stack->connectable == enable) return; 3090 3091 hci_stack->connectable = enable; 3092 hci_update_scan_enable(); 3093 } 3094 #endif 3095 3096 void gap_local_bd_addr(bd_addr_t address_buffer){ 3097 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3098 } 3099 3100 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3101 static void hci_host_num_completed_packets(void){ 3102 3103 // create packet manually as arrays are not supported and num_commands should not get reduced 3104 hci_reserve_packet_buffer(); 3105 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3106 3107 uint16_t size = 0; 3108 uint16_t num_handles = 0; 3109 packet[size++] = 0x35; 3110 packet[size++] = 0x0c; 3111 size++; // skip param len 3112 size++; // skip num handles 3113 3114 // add { handle, packets } entries 3115 btstack_linked_item_t * it; 3116 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3117 hci_connection_t * connection = (hci_connection_t *) it; 3118 if (connection->num_packets_completed){ 3119 little_endian_store_16(packet, size, connection->con_handle); 3120 size += 2; 3121 little_endian_store_16(packet, size, connection->num_packets_completed); 3122 size += 2; 3123 // 3124 num_handles++; 3125 connection->num_packets_completed = 0; 3126 } 3127 } 3128 3129 packet[2] = size - 3; 3130 packet[3] = num_handles; 3131 3132 hci_stack->host_completed_packets = 0; 3133 3134 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3135 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3136 3137 // release packet buffer for synchronous transport implementations 3138 if (hci_transport_synchronous()){ 3139 hci_release_packet_buffer(); 3140 hci_emit_transport_packet_sent(); 3141 } 3142 } 3143 #endif 3144 3145 static void hci_run(void){ 3146 3147 // log_info("hci_run: entered"); 3148 btstack_linked_item_t * it; 3149 3150 // send continuation fragments first, as they block the prepared packet buffer 3151 if (hci_stack->acl_fragmentation_total_size > 0) { 3152 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3153 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3154 if (connection) { 3155 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3156 hci_send_acl_packet_fragments(connection); 3157 return; 3158 } 3159 } else { 3160 // connection gone -> discard further fragments 3161 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3162 hci_stack->acl_fragmentation_total_size = 0; 3163 hci_stack->acl_fragmentation_pos = 0; 3164 } 3165 } 3166 3167 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3168 // send host num completed packets next as they don't require num_cmd_packets > 0 3169 if (!hci_can_send_comand_packet_transport()) return; 3170 if (hci_stack->host_completed_packets){ 3171 hci_host_num_completed_packets(); 3172 return; 3173 } 3174 #endif 3175 3176 if (!hci_can_send_command_packet_now()) return; 3177 3178 // global/non-connection oriented commands 3179 3180 #ifdef ENABLE_CLASSIC 3181 // decline incoming connections 3182 if (hci_stack->decline_reason){ 3183 uint8_t reason = hci_stack->decline_reason; 3184 hci_stack->decline_reason = 0; 3185 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3186 return; 3187 } 3188 // send scan enable 3189 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 3190 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3191 hci_stack->new_scan_enable_value = 0xff; 3192 return; 3193 } 3194 // start/stop inquiry 3195 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 3196 uint8_t duration = hci_stack->inquiry_state; 3197 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3198 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3199 return; 3200 } 3201 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3202 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3203 hci_send_cmd(&hci_inquiry_cancel); 3204 return; 3205 } 3206 // remote name request 3207 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3208 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3209 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3210 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3211 return; 3212 } 3213 // pairing 3214 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3215 uint8_t state = hci_stack->gap_pairing_state; 3216 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3217 switch (state){ 3218 case GAP_PAIRING_STATE_SEND_PIN: 3219 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); 3220 break; 3221 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3222 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3223 break; 3224 case GAP_PAIRING_STATE_SEND_PASSKEY: 3225 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3226 break; 3227 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3228 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3229 break; 3230 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3231 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3232 break; 3233 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3234 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3235 break; 3236 default: 3237 break; 3238 } 3239 return; 3240 } 3241 #endif 3242 3243 #ifdef ENABLE_BLE 3244 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 3245 if ((hci_stack->state == HCI_STATE_WORKING) 3246 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 3247 3248 #ifdef ENABLE_LE_CENTRAL 3249 // handle le scan 3250 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3251 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3252 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3253 return; 3254 } 3255 if (hci_stack->le_scan_type != 0xff){ 3256 // defaults: active scanning, accept all advertisement packets 3257 int scan_type = hci_stack->le_scan_type; 3258 hci_stack->le_scan_type = 0xff; 3259 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); 3260 return; 3261 } 3262 #endif 3263 #ifdef ENABLE_LE_PERIPHERAL 3264 // le advertisement control 3265 if (hci_stack->le_advertisements_todo){ 3266 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3267 } 3268 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3269 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3270 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3271 return; 3272 } 3273 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3274 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3275 hci_send_cmd(&hci_le_set_advertising_parameters, 3276 hci_stack->le_advertisements_interval_min, 3277 hci_stack->le_advertisements_interval_max, 3278 hci_stack->le_advertisements_type, 3279 hci_stack->le_own_addr_type, 3280 hci_stack->le_advertisements_direct_address_type, 3281 hci_stack->le_advertisements_direct_address, 3282 hci_stack->le_advertisements_channel_map, 3283 hci_stack->le_advertisements_filter_policy); 3284 return; 3285 } 3286 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3287 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3288 uint8_t adv_data_clean[31]; 3289 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3290 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 3291 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3292 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3293 return; 3294 } 3295 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3296 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3297 uint8_t scan_data_clean[31]; 3298 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3299 memcpy(scan_data_clean, hci_stack->le_scan_response_data, hci_stack->le_scan_response_data_len); 3300 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3301 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, hci_stack->le_scan_response_data); 3302 return; 3303 } 3304 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3305 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3306 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3307 return; 3308 } 3309 #endif 3310 3311 #ifdef ENABLE_LE_CENTRAL 3312 // 3313 // LE Whitelist Management 3314 // 3315 3316 // check if whitelist needs modification 3317 btstack_linked_list_iterator_t lit; 3318 int modification_pending = 0; 3319 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3320 while (btstack_linked_list_iterator_has_next(&lit)){ 3321 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3322 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3323 modification_pending = 1; 3324 break; 3325 } 3326 } 3327 3328 if (modification_pending){ 3329 // stop connnecting if modification pending 3330 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3331 hci_send_cmd(&hci_le_create_connection_cancel); 3332 return; 3333 } 3334 3335 // add/remove entries 3336 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3337 while (btstack_linked_list_iterator_has_next(&lit)){ 3338 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3339 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3340 entry->state = LE_WHITELIST_ON_CONTROLLER; 3341 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3342 return; 3343 3344 } 3345 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3346 bd_addr_t address; 3347 bd_addr_type_t address_type = entry->address_type; 3348 memcpy(address, entry->address, 6); 3349 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3350 btstack_memory_whitelist_entry_free(entry); 3351 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3352 return; 3353 } 3354 } 3355 } 3356 3357 // start connecting 3358 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3359 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3360 bd_addr_t null_addr; 3361 memset(null_addr, 0, 6); 3362 hci_send_cmd(&hci_le_create_connection, 3363 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3364 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3365 1, // use whitelist 3366 0, // peer address type 3367 null_addr, // peer bd addr 3368 hci_stack->le_own_addr_type, // our addr type: 3369 hci_stack->le_connection_interval_min, // conn interval min 3370 hci_stack->le_connection_interval_max, // conn interval max 3371 hci_stack->le_connection_latency, // conn latency 3372 hci_stack->le_supervision_timeout, // conn latency 3373 hci_stack->le_minimum_ce_length, // min ce length 3374 hci_stack->le_maximum_ce_length // max ce length 3375 ); 3376 return; 3377 } 3378 #endif 3379 } 3380 #endif 3381 3382 // send pending HCI commands 3383 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3384 hci_connection_t * connection = (hci_connection_t *) it; 3385 3386 switch(connection->state){ 3387 case SEND_CREATE_CONNECTION: 3388 switch(connection->address_type){ 3389 #ifdef ENABLE_CLASSIC 3390 case BD_ADDR_TYPE_CLASSIC: 3391 log_info("sending hci_create_connection"); 3392 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3393 break; 3394 #endif 3395 default: 3396 #ifdef ENABLE_BLE 3397 #ifdef ENABLE_LE_CENTRAL 3398 // track outgoing connection 3399 hci_stack->outgoing_addr_type = connection->address_type; 3400 memcpy(hci_stack->outgoing_addr, connection->address, 6); 3401 log_info("sending hci_le_create_connection"); 3402 hci_send_cmd(&hci_le_create_connection, 3403 hci_stack->le_connection_scan_interval, // conn scan interval 3404 hci_stack->le_connection_scan_window, // conn scan windows 3405 0, // don't use whitelist 3406 connection->address_type, // peer address type 3407 connection->address, // peer bd addr 3408 hci_stack->le_own_addr_type, // our addr type: 3409 hci_stack->le_connection_interval_min, // conn interval min 3410 hci_stack->le_connection_interval_max, // conn interval max 3411 hci_stack->le_connection_latency, // conn latency 3412 hci_stack->le_supervision_timeout, // conn latency 3413 hci_stack->le_minimum_ce_length, // min ce length 3414 hci_stack->le_maximum_ce_length // max ce length 3415 ); 3416 connection->state = SENT_CREATE_CONNECTION; 3417 #endif 3418 #endif 3419 break; 3420 } 3421 return; 3422 3423 #ifdef ENABLE_CLASSIC 3424 case RECEIVED_CONNECTION_REQUEST: 3425 connection->role = HCI_ROLE_SLAVE; 3426 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3427 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3428 connection->state = ACCEPTED_CONNECTION_REQUEST; 3429 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3430 } 3431 return; 3432 #endif 3433 3434 #ifdef ENABLE_BLE 3435 #ifdef ENABLE_LE_CENTRAL 3436 case SEND_CANCEL_CONNECTION: 3437 connection->state = SENT_CANCEL_CONNECTION; 3438 hci_send_cmd(&hci_le_create_connection_cancel); 3439 return; 3440 #endif 3441 #endif 3442 case SEND_DISCONNECT: 3443 connection->state = SENT_DISCONNECT; 3444 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3445 return; 3446 3447 default: 3448 break; 3449 } 3450 3451 // no further commands if connection is about to get shut down 3452 if (connection->state == SENT_DISCONNECT) continue; 3453 3454 #ifdef ENABLE_CLASSIC 3455 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3456 log_info("responding to link key request"); 3457 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3458 link_key_t link_key; 3459 link_key_type_t link_key_type; 3460 if ( hci_stack->link_key_db 3461 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3462 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3463 connection->link_key_type = link_key_type; 3464 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3465 } else { 3466 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3467 } 3468 return; 3469 } 3470 3471 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3472 log_info("denying to pin request"); 3473 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3474 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3475 return; 3476 } 3477 3478 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3479 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3480 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3481 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3482 // tweak authentication requirements 3483 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3484 if (connection->bonding_flags & BONDING_DEDICATED){ 3485 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3486 } 3487 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3488 authreq |= 1; 3489 } 3490 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3491 } else { 3492 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3493 } 3494 return; 3495 } 3496 3497 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3498 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3499 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3500 return; 3501 } 3502 3503 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3504 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3505 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3506 return; 3507 } 3508 3509 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3510 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3511 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3512 return; 3513 } 3514 3515 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3516 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3517 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3518 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3519 return; 3520 } 3521 3522 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3523 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3524 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3525 return; 3526 } 3527 3528 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3529 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3530 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3531 return; 3532 } 3533 #endif 3534 3535 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3536 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3537 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3538 return; 3539 } 3540 3541 #ifdef ENABLE_CLASSIC 3542 uint16_t sniff_min_interval; 3543 switch (connection->sniff_min_interval){ 3544 case 0: 3545 break; 3546 case 0xffff: 3547 connection->sniff_min_interval = 0; 3548 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3549 return; 3550 default: 3551 sniff_min_interval = connection->sniff_min_interval; 3552 connection->sniff_min_interval = 0; 3553 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3554 return; 3555 } 3556 #endif 3557 3558 #ifdef ENABLE_BLE 3559 switch (connection->le_con_parameter_update_state){ 3560 // response to L2CAP CON PARAMETER UPDATE REQUEST 3561 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3562 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3563 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3564 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3565 0x0000, 0xffff); 3566 return; 3567 case CON_PARAMETER_UPDATE_REPLY: 3568 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3569 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3570 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3571 0x0000, 0xffff); 3572 return; 3573 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3574 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3575 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3576 return; 3577 default: 3578 break; 3579 } 3580 if (connection->le_phy_update_all_phys != 0xff){ 3581 uint8_t all_phys = connection->le_phy_update_all_phys; 3582 connection->le_phy_update_all_phys = 0xff; 3583 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); 3584 return; 3585 } 3586 #endif 3587 } 3588 3589 hci_connection_t * connection; 3590 switch (hci_stack->state){ 3591 case HCI_STATE_INITIALIZING: 3592 hci_initializing_run(); 3593 break; 3594 3595 case HCI_STATE_HALTING: 3596 3597 log_info("HCI_STATE_HALTING"); 3598 3599 // free whitelist entries 3600 #ifdef ENABLE_BLE 3601 #ifdef ENABLE_LE_CENTRAL 3602 { 3603 btstack_linked_list_iterator_t lit; 3604 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3605 while (btstack_linked_list_iterator_has_next(&lit)){ 3606 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3607 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3608 btstack_memory_whitelist_entry_free(entry); 3609 } 3610 } 3611 #endif 3612 #endif 3613 // close all open connections 3614 connection = (hci_connection_t *) hci_stack->connections; 3615 if (connection){ 3616 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3617 if (!hci_can_send_command_packet_now()) return; 3618 3619 // check state 3620 if (connection->state == SENT_DISCONNECT) return; 3621 connection->state = SENT_DISCONNECT; 3622 3623 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3624 3625 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3626 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3627 3628 // ... which would be ignored anyway as we shutdown (free) the connection now 3629 hci_shutdown_connection(connection); 3630 3631 // finally, send the disconnect command 3632 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3633 return; 3634 } 3635 log_info("HCI_STATE_HALTING, calling off"); 3636 3637 // switch mode 3638 hci_power_control_off(); 3639 3640 log_info("HCI_STATE_HALTING, emitting state"); 3641 hci_emit_state(); 3642 log_info("HCI_STATE_HALTING, done"); 3643 break; 3644 3645 case HCI_STATE_FALLING_ASLEEP: 3646 switch(hci_stack->substate) { 3647 case HCI_FALLING_ASLEEP_DISCONNECT: 3648 log_info("HCI_STATE_FALLING_ASLEEP"); 3649 // close all open connections 3650 connection = (hci_connection_t *) hci_stack->connections; 3651 3652 #ifdef HAVE_PLATFORM_IPHONE_OS 3653 // don't close connections, if H4 supports power management 3654 if (btstack_control_iphone_power_management_enabled()){ 3655 connection = NULL; 3656 } 3657 #endif 3658 if (connection){ 3659 3660 // send disconnect 3661 if (!hci_can_send_command_packet_now()) return; 3662 3663 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3664 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3665 3666 // send disconnected event right away - causes higher layer connections to get closed, too. 3667 hci_shutdown_connection(connection); 3668 return; 3669 } 3670 3671 if (hci_classic_supported()){ 3672 // disable page and inquiry scan 3673 if (!hci_can_send_command_packet_now()) return; 3674 3675 log_info("HCI_STATE_HALTING, disabling inq scans"); 3676 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3677 3678 // continue in next sub state 3679 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3680 break; 3681 } 3682 // no break - fall through for ble-only chips 3683 3684 case HCI_FALLING_ASLEEP_COMPLETE: 3685 log_info("HCI_STATE_HALTING, calling sleep"); 3686 #ifdef HAVE_PLATFORM_IPHONE_OS 3687 // don't actually go to sleep, if H4 supports power management 3688 if (btstack_control_iphone_power_management_enabled()){ 3689 // SLEEP MODE reached 3690 hci_stack->state = HCI_STATE_SLEEPING; 3691 hci_emit_state(); 3692 break; 3693 } 3694 #endif 3695 // switch mode 3696 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3697 hci_emit_state(); 3698 break; 3699 3700 default: 3701 break; 3702 } 3703 break; 3704 3705 default: 3706 break; 3707 } 3708 } 3709 3710 int hci_send_cmd_packet(uint8_t *packet, int size){ 3711 // house-keeping 3712 3713 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3714 hci_stack->loopback_mode = packet[3]; 3715 } 3716 3717 #ifdef ENABLE_CLASSIC 3718 bd_addr_t addr; 3719 hci_connection_t * conn; 3720 3721 // create_connection? 3722 if (IS_COMMAND(packet, hci_create_connection)){ 3723 reverse_bd_addr(&packet[3], addr); 3724 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3725 3726 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3727 if (!conn){ 3728 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3729 if (!conn){ 3730 // notify client that alloc failed 3731 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3732 return -1; // packet not sent to controller 3733 } 3734 conn->state = SEND_CREATE_CONNECTION; 3735 } 3736 log_info("conn state %u", conn->state); 3737 switch (conn->state){ 3738 // if connection active exists 3739 case OPEN: 3740 // and OPEN, emit connection complete command 3741 hci_emit_connection_complete(addr, conn->con_handle, 0); 3742 return -1; // packet not sent to controller 3743 case SEND_CREATE_CONNECTION: 3744 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 3745 break; 3746 default: 3747 // otherwise, just ignore as it is already in the open process 3748 return -1; // packet not sent to controller 3749 } 3750 conn->state = SENT_CREATE_CONNECTION; 3751 3752 // track outgoing connection 3753 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_CLASSIC; 3754 memcpy(hci_stack->outgoing_addr, addr, 6); 3755 } 3756 3757 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3758 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3759 } 3760 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3761 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3762 } 3763 3764 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3765 if (hci_stack->link_key_db){ 3766 reverse_bd_addr(&packet[3], addr); 3767 hci_stack->link_key_db->delete_link_key(addr); 3768 } 3769 } 3770 3771 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3772 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3773 reverse_bd_addr(&packet[3], addr); 3774 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3775 if (conn){ 3776 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3777 } 3778 } 3779 3780 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3781 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3782 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3783 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3784 reverse_bd_addr(&packet[3], addr); 3785 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3786 if (conn){ 3787 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3788 } 3789 } 3790 3791 #ifdef ENABLE_SCO_OVER_HCI 3792 // setup_synchronous_connection? Voice setting at offset 22 3793 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3794 // TODO: compare to current setting if sco connection already active 3795 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3796 } 3797 // accept_synchronus_connection? Voice setting at offset 18 3798 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3799 // TODO: compare to current setting if sco connection already active 3800 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3801 } 3802 #endif 3803 #endif 3804 3805 #ifdef ENABLE_BLE 3806 #ifdef ENABLE_LE_PERIPHERAL 3807 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3808 hci_stack->le_random_address_set = 1; 3809 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3810 } 3811 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3812 hci_stack->le_advertisements_active = packet[3]; 3813 } 3814 #endif 3815 #ifdef ENABLE_LE_CENTRAL 3816 if (IS_COMMAND(packet, hci_le_create_connection)){ 3817 // white list used? 3818 uint8_t initiator_filter_policy = packet[7]; 3819 switch (initiator_filter_policy){ 3820 case 0: 3821 // whitelist not used 3822 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3823 break; 3824 case 1: 3825 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3826 break; 3827 default: 3828 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3829 break; 3830 } 3831 } 3832 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3833 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3834 } 3835 #endif 3836 #endif 3837 3838 hci_stack->num_cmd_packets--; 3839 3840 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3841 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3842 } 3843 3844 // disconnect because of security block 3845 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3846 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3847 if (!connection) return; 3848 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3849 } 3850 3851 3852 // Configure Secure Simple Pairing 3853 3854 #ifdef ENABLE_CLASSIC 3855 3856 // enable will enable SSP during init 3857 void gap_ssp_set_enable(int enable){ 3858 hci_stack->ssp_enable = enable; 3859 } 3860 3861 static int hci_local_ssp_activated(void){ 3862 return gap_ssp_supported() && hci_stack->ssp_enable; 3863 } 3864 3865 // if set, BTstack will respond to io capability request using authentication requirement 3866 void gap_ssp_set_io_capability(int io_capability){ 3867 hci_stack->ssp_io_capability = io_capability; 3868 } 3869 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3870 hci_stack->ssp_authentication_requirement = authentication_requirement; 3871 } 3872 3873 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3874 void gap_ssp_set_auto_accept(int auto_accept){ 3875 hci_stack->ssp_auto_accept = auto_accept; 3876 } 3877 #endif 3878 3879 // va_list part of hci_send_cmd 3880 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3881 if (!hci_can_send_command_packet_now()){ 3882 log_error("hci_send_cmd called but cannot send packet now"); 3883 return 0; 3884 } 3885 3886 // for HCI INITIALIZATION 3887 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3888 hci_stack->last_cmd_opcode = cmd->opcode; 3889 3890 hci_reserve_packet_buffer(); 3891 uint8_t * packet = hci_stack->hci_packet_buffer; 3892 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3893 int err = hci_send_cmd_packet(packet, size); 3894 3895 // release packet buffer for synchronous transport implementations 3896 if (hci_transport_synchronous()){ 3897 hci_release_packet_buffer(); 3898 hci_emit_transport_packet_sent(); 3899 } 3900 3901 return err; 3902 } 3903 3904 /** 3905 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3906 */ 3907 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3908 va_list argptr; 3909 va_start(argptr, cmd); 3910 int res = hci_send_cmd_va_arg(cmd, argptr); 3911 va_end(argptr); 3912 return res; 3913 } 3914 3915 // Create various non-HCI events. 3916 // TODO: generalize, use table similar to hci_create_command 3917 3918 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3919 // dump packet 3920 if (dump) { 3921 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3922 } 3923 3924 // dispatch to all event handlers 3925 btstack_linked_list_iterator_t it; 3926 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3927 while (btstack_linked_list_iterator_has_next(&it)){ 3928 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3929 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3930 } 3931 } 3932 3933 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3934 if (!hci_stack->acl_packet_handler) return; 3935 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3936 } 3937 3938 #ifdef ENABLE_CLASSIC 3939 static void hci_notify_if_sco_can_send_now(void){ 3940 // notify SCO sender if waiting 3941 if (!hci_stack->sco_waiting_for_can_send_now) return; 3942 if (hci_can_send_sco_packet_now()){ 3943 hci_stack->sco_waiting_for_can_send_now = 0; 3944 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3945 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3946 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3947 } 3948 } 3949 3950 // parsing end emitting has been merged to reduce code size 3951 static void gap_inquiry_explode(uint8_t * packet){ 3952 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 3953 3954 uint8_t * eir_data; 3955 ad_context_t context; 3956 const uint8_t * name; 3957 uint8_t name_len; 3958 3959 int event_type = hci_event_packet_get_type(packet); 3960 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 3961 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 3962 3963 // event[1] is set at the end 3964 int i; 3965 for (i=0; i<num_responses;i++){ 3966 memset(event, 0, sizeof(event)); 3967 event[0] = GAP_EVENT_INQUIRY_RESULT; 3968 uint8_t event_size = 18; // if name is not set by EIR 3969 3970 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 3971 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 3972 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 3973 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 3974 3975 switch (event_type){ 3976 case HCI_EVENT_INQUIRY_RESULT: 3977 // 14,15,16,17 = 0, size 18 3978 break; 3979 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3980 event[14] = 1; 3981 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3982 // 16,17 = 0, size 18 3983 break; 3984 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3985 event[14] = 1; 3986 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3987 // for EIR packets, there is only one reponse in it 3988 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 3989 name = NULL; 3990 // EIR data is 240 bytes in EIR event 3991 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 3992 uint8_t data_type = ad_iterator_get_data_type(&context); 3993 uint8_t data_size = ad_iterator_get_data_len(&context); 3994 const uint8_t * data = ad_iterator_get_data(&context); 3995 // Prefer Complete Local Name over Shortend Local Name 3996 switch (data_type){ 3997 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 3998 if (name) continue; 3999 /* explicit fall-through */ 4000 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4001 name = data; 4002 name_len = data_size; 4003 break; 4004 default: 4005 break; 4006 } 4007 } 4008 if (name){ 4009 event[16] = 1; 4010 // truncate name if needed 4011 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4012 event[17] = len; 4013 memcpy(&event[18], name, len); 4014 event_size += len; 4015 } 4016 break; 4017 } 4018 event[1] = event_size - 2; 4019 hci_emit_event(event, event_size, 1); 4020 } 4021 } 4022 #endif 4023 4024 void hci_emit_state(void){ 4025 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4026 uint8_t event[3]; 4027 event[0] = BTSTACK_EVENT_STATE; 4028 event[1] = sizeof(event) - 2; 4029 event[2] = hci_stack->state; 4030 hci_emit_event(event, sizeof(event), 1); 4031 } 4032 4033 #ifdef ENABLE_CLASSIC 4034 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4035 uint8_t event[13]; 4036 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4037 event[1] = sizeof(event) - 2; 4038 event[2] = status; 4039 little_endian_store_16(event, 3, con_handle); 4040 reverse_bd_addr(address, &event[5]); 4041 event[11] = 1; // ACL connection 4042 event[12] = 0; // encryption disabled 4043 hci_emit_event(event, sizeof(event), 1); 4044 } 4045 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4046 if (disable_l2cap_timeouts) return; 4047 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4048 uint8_t event[4]; 4049 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4050 event[1] = sizeof(event) - 2; 4051 little_endian_store_16(event, 2, conn->con_handle); 4052 hci_emit_event(event, sizeof(event), 1); 4053 } 4054 #endif 4055 4056 #ifdef ENABLE_BLE 4057 #ifdef ENABLE_LE_CENTRAL 4058 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4059 uint8_t event[21]; 4060 event[0] = HCI_EVENT_LE_META; 4061 event[1] = sizeof(event) - 2; 4062 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4063 event[3] = status; 4064 little_endian_store_16(event, 4, con_handle); 4065 event[6] = 0; // TODO: role 4066 event[7] = address_type; 4067 reverse_bd_addr(address, &event[8]); 4068 little_endian_store_16(event, 14, 0); // interval 4069 little_endian_store_16(event, 16, 0); // latency 4070 little_endian_store_16(event, 18, 0); // supervision timeout 4071 event[20] = 0; // master clock accuracy 4072 hci_emit_event(event, sizeof(event), 1); 4073 } 4074 #endif 4075 #endif 4076 4077 static void hci_emit_transport_packet_sent(void){ 4078 // notify upper stack that it might be possible to send again 4079 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4080 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4081 } 4082 4083 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4084 uint8_t event[6]; 4085 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4086 event[1] = sizeof(event) - 2; 4087 event[2] = 0; // status = OK 4088 little_endian_store_16(event, 3, con_handle); 4089 event[5] = reason; 4090 hci_emit_event(event, sizeof(event), 1); 4091 } 4092 4093 static void hci_emit_nr_connections_changed(void){ 4094 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4095 uint8_t event[3]; 4096 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4097 event[1] = sizeof(event) - 2; 4098 event[2] = nr_hci_connections(); 4099 hci_emit_event(event, sizeof(event), 1); 4100 } 4101 4102 static void hci_emit_hci_open_failed(void){ 4103 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4104 uint8_t event[2]; 4105 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4106 event[1] = sizeof(event) - 2; 4107 hci_emit_event(event, sizeof(event), 1); 4108 } 4109 4110 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4111 log_info("hci_emit_dedicated_bonding_result %u ", status); 4112 uint8_t event[9]; 4113 int pos = 0; 4114 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4115 event[pos++] = sizeof(event) - 2; 4116 event[pos++] = status; 4117 reverse_bd_addr(address, &event[pos]); 4118 hci_emit_event(event, sizeof(event), 1); 4119 } 4120 4121 4122 #ifdef ENABLE_CLASSIC 4123 4124 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4125 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4126 uint8_t event[5]; 4127 int pos = 0; 4128 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4129 event[pos++] = sizeof(event) - 2; 4130 little_endian_store_16(event, 2, con_handle); 4131 pos += 2; 4132 event[pos++] = level; 4133 hci_emit_event(event, sizeof(event), 1); 4134 } 4135 4136 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4137 if (!connection) return LEVEL_0; 4138 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4139 return gap_security_level_for_link_key_type(connection->link_key_type); 4140 } 4141 4142 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4143 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4144 uint8_t event[3]; 4145 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4146 event[1] = sizeof(event) - 2; 4147 event[2] = enabled; 4148 hci_emit_event(event, sizeof(event), 1); 4149 } 4150 4151 #ifdef ENABLE_CLASSIC 4152 // query if remote side supports eSCO 4153 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4154 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4155 if (!connection) return 0; 4156 return connection->remote_supported_feature_eSCO; 4157 } 4158 4159 // query if remote side supports SSP 4160 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4161 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4162 if (!connection) return 0; 4163 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 4164 } 4165 4166 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4167 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4168 } 4169 #endif 4170 4171 // GAP API 4172 /** 4173 * @bbrief enable/disable bonding. default is enabled 4174 * @praram enabled 4175 */ 4176 void gap_set_bondable_mode(int enable){ 4177 hci_stack->bondable = enable ? 1 : 0; 4178 } 4179 /** 4180 * @brief Get bondable mode. 4181 * @return 1 if bondable 4182 */ 4183 int gap_get_bondable_mode(void){ 4184 return hci_stack->bondable; 4185 } 4186 4187 /** 4188 * @brief map link keys to security levels 4189 */ 4190 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4191 switch (link_key_type){ 4192 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4193 return LEVEL_4; 4194 case COMBINATION_KEY: 4195 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4196 return LEVEL_3; 4197 default: 4198 return LEVEL_2; 4199 } 4200 } 4201 4202 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4203 log_info("gap_mitm_protection_required_for_security_level %u", level); 4204 return level > LEVEL_2; 4205 } 4206 4207 /** 4208 * @brief get current security level 4209 */ 4210 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4211 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4212 if (!connection) return LEVEL_0; 4213 return gap_security_level_for_connection(connection); 4214 } 4215 4216 /** 4217 * @brief request connection to device to 4218 * @result GAP_AUTHENTICATION_RESULT 4219 */ 4220 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4221 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4222 if (!connection){ 4223 hci_emit_security_level(con_handle, LEVEL_0); 4224 return; 4225 } 4226 gap_security_level_t current_level = gap_security_level(con_handle); 4227 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4228 requested_level, connection->requested_security_level, current_level); 4229 4230 // assumption: earlier requested security higher than current level => security request is active 4231 if (current_level < connection->requested_security_level){ 4232 if (connection->requested_security_level < requested_level){ 4233 // increase requested level as new level is higher 4234 4235 // TODO: handle re-authentication when done 4236 4237 connection->requested_security_level = requested_level; 4238 } 4239 return; 4240 } 4241 4242 // no request active, notify if security sufficient 4243 if (requested_level <= current_level){ 4244 hci_emit_security_level(con_handle, current_level); 4245 return; 4246 } 4247 4248 // start pairing to increase security level 4249 connection->requested_security_level = requested_level; 4250 4251 #if 0 4252 // sending encryption request without a link key results in an error. 4253 // TODO: figure out how to use it properly 4254 4255 // would enabling ecnryption suffice (>= LEVEL_2)? 4256 if (hci_stack->link_key_db){ 4257 link_key_type_t link_key_type; 4258 link_key_t link_key; 4259 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4260 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4261 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4262 return; 4263 } 4264 } 4265 } 4266 #endif 4267 4268 // start to authenticate connection 4269 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4270 hci_run(); 4271 } 4272 4273 /** 4274 * @brief start dedicated bonding with device. disconnect after bonding 4275 * @param device 4276 * @param request MITM protection 4277 * @result GAP_DEDICATED_BONDING_COMPLETE 4278 */ 4279 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4280 4281 // create connection state machine 4282 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 4283 4284 if (!connection){ 4285 return BTSTACK_MEMORY_ALLOC_FAILED; 4286 } 4287 4288 // delete linkn key 4289 gap_drop_link_key_for_bd_addr(device); 4290 4291 // configure LEVEL_2/3, dedicated bonding 4292 connection->state = SEND_CREATE_CONNECTION; 4293 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4294 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4295 connection->bonding_flags = BONDING_DEDICATED; 4296 4297 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4298 4299 // handle: connnection failure (connection complete != ok) 4300 // handle: authentication failure 4301 // handle: disconnect on done 4302 4303 hci_run(); 4304 4305 return 0; 4306 } 4307 #endif 4308 4309 void gap_set_local_name(const char * local_name){ 4310 hci_stack->local_name = local_name; 4311 } 4312 4313 4314 #ifdef ENABLE_BLE 4315 4316 #ifdef ENABLE_LE_CENTRAL 4317 void gap_start_scan(void){ 4318 hci_stack->le_scanning_enabled = 1; 4319 hci_run(); 4320 } 4321 4322 void gap_stop_scan(void){ 4323 hci_stack->le_scanning_enabled = 0; 4324 hci_run(); 4325 } 4326 4327 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4328 hci_stack->le_scan_type = scan_type; 4329 hci_stack->le_scan_interval = scan_interval; 4330 hci_stack->le_scan_window = scan_window; 4331 hci_run(); 4332 } 4333 4334 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4335 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4336 if (!conn){ 4337 log_info("gap_connect: no connection exists yet, creating context"); 4338 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4339 if (!conn){ 4340 // notify client that alloc failed 4341 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4342 log_info("gap_connect: failed to alloc hci_connection_t"); 4343 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4344 } 4345 conn->state = SEND_CREATE_CONNECTION; 4346 log_info("gap_connect: send create connection next"); 4347 hci_run(); 4348 return 0; 4349 } 4350 4351 if (!hci_is_le_connection(conn) || 4352 conn->state == SEND_CREATE_CONNECTION || 4353 conn->state == SENT_CREATE_CONNECTION) { 4354 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4355 log_error("gap_connect: classic connection or connect is already being created"); 4356 return GATT_CLIENT_IN_WRONG_STATE; 4357 } 4358 4359 log_info("gap_connect: context exists with state %u", conn->state); 4360 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4361 hci_run(); 4362 return 0; 4363 } 4364 4365 // @assumption: only a single outgoing LE Connection exists 4366 static hci_connection_t * gap_get_outgoing_connection(void){ 4367 btstack_linked_item_t *it; 4368 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4369 hci_connection_t * conn = (hci_connection_t *) it; 4370 if (!hci_is_le_connection(conn)) continue; 4371 switch (conn->state){ 4372 case SEND_CREATE_CONNECTION: 4373 case SENT_CREATE_CONNECTION: 4374 case SENT_CANCEL_CONNECTION: 4375 return conn; 4376 default: 4377 break; 4378 }; 4379 } 4380 return NULL; 4381 } 4382 4383 uint8_t gap_connect_cancel(void){ 4384 hci_connection_t * conn = gap_get_outgoing_connection(); 4385 if (!conn) return 0; 4386 switch (conn->state){ 4387 case SEND_CREATE_CONNECTION: 4388 // skip sending create connection and emit event instead 4389 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4390 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4391 btstack_memory_hci_connection_free( conn ); 4392 break; 4393 case SENT_CREATE_CONNECTION: 4394 // request to send cancel connection 4395 conn->state = SEND_CANCEL_CONNECTION; 4396 hci_run(); 4397 break; 4398 default: 4399 break; 4400 } 4401 return 0; 4402 } 4403 #endif 4404 4405 #ifdef ENABLE_LE_CENTRAL 4406 /** 4407 * @brief Set connection parameters for outgoing connections 4408 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4409 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4410 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4411 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4412 * @param conn_latency, default: 4 4413 * @param supervision_timeout (unit: 10ms), default: 720 ms 4414 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4415 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4416 */ 4417 4418 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4419 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4420 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4421 hci_stack->le_connection_scan_interval = conn_scan_interval; 4422 hci_stack->le_connection_scan_window = conn_scan_window; 4423 hci_stack->le_connection_interval_min = conn_interval_min; 4424 hci_stack->le_connection_interval_max = conn_interval_max; 4425 hci_stack->le_connection_latency = conn_latency; 4426 hci_stack->le_supervision_timeout = supervision_timeout; 4427 hci_stack->le_minimum_ce_length = min_ce_length; 4428 hci_stack->le_maximum_ce_length = max_ce_length; 4429 } 4430 #endif 4431 4432 /** 4433 * @brief Updates the connection parameters for a given LE connection 4434 * @param handle 4435 * @param conn_interval_min (unit: 1.25ms) 4436 * @param conn_interval_max (unit: 1.25ms) 4437 * @param conn_latency 4438 * @param supervision_timeout (unit: 10ms) 4439 * @returns 0 if ok 4440 */ 4441 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4442 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4443 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4444 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4445 connection->le_conn_interval_min = conn_interval_min; 4446 connection->le_conn_interval_max = conn_interval_max; 4447 connection->le_conn_latency = conn_latency; 4448 connection->le_supervision_timeout = supervision_timeout; 4449 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4450 hci_run(); 4451 return 0; 4452 } 4453 4454 /** 4455 * @brief Request an update of the connection parameter for a given LE connection 4456 * @param handle 4457 * @param conn_interval_min (unit: 1.25ms) 4458 * @param conn_interval_max (unit: 1.25ms) 4459 * @param conn_latency 4460 * @param supervision_timeout (unit: 10ms) 4461 * @returns 0 if ok 4462 */ 4463 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4464 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4465 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4466 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4467 connection->le_conn_interval_min = conn_interval_min; 4468 connection->le_conn_interval_max = conn_interval_max; 4469 connection->le_conn_latency = conn_latency; 4470 connection->le_supervision_timeout = supervision_timeout; 4471 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4472 hci_run(); 4473 return 0; 4474 } 4475 4476 #ifdef ENABLE_LE_PERIPHERAL 4477 4478 static void gap_advertisments_changed(void){ 4479 // disable advertisements before updating adv, scan data, or adv params 4480 if (hci_stack->le_advertisements_active){ 4481 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4482 } 4483 hci_run(); 4484 } 4485 4486 /** 4487 * @brief Set Advertisement Data 4488 * @param advertising_data_length 4489 * @param advertising_data (max 31 octets) 4490 * @note data is not copied, pointer has to stay valid 4491 */ 4492 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4493 hci_stack->le_advertisements_data_len = advertising_data_length; 4494 hci_stack->le_advertisements_data = advertising_data; 4495 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4496 gap_advertisments_changed(); 4497 } 4498 4499 /** 4500 * @brief Set Scan Response Data 4501 * @param advertising_data_length 4502 * @param advertising_data (max 31 octets) 4503 * @note data is not copied, pointer has to stay valid 4504 */ 4505 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4506 hci_stack->le_scan_response_data_len = scan_response_data_length; 4507 hci_stack->le_scan_response_data = scan_response_data; 4508 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4509 gap_advertisments_changed(); 4510 } 4511 4512 /** 4513 * @brief Set Advertisement Parameters 4514 * @param adv_int_min 4515 * @param adv_int_max 4516 * @param adv_type 4517 * @param direct_address_type 4518 * @param direct_address 4519 * @param channel_map 4520 * @param filter_policy 4521 * 4522 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4523 */ 4524 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4525 uint8_t direct_address_typ, bd_addr_t direct_address, 4526 uint8_t channel_map, uint8_t filter_policy) { 4527 4528 hci_stack->le_advertisements_interval_min = adv_int_min; 4529 hci_stack->le_advertisements_interval_max = adv_int_max; 4530 hci_stack->le_advertisements_type = adv_type; 4531 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4532 hci_stack->le_advertisements_channel_map = channel_map; 4533 hci_stack->le_advertisements_filter_policy = filter_policy; 4534 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4535 4536 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4537 gap_advertisments_changed(); 4538 } 4539 4540 /** 4541 * @brief Enable/Disable Advertisements 4542 * @param enabled 4543 */ 4544 void gap_advertisements_enable(int enabled){ 4545 hci_stack->le_advertisements_enabled = enabled; 4546 if (enabled && !hci_stack->le_advertisements_active){ 4547 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4548 } 4549 if (!enabled && hci_stack->le_advertisements_active){ 4550 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4551 } 4552 hci_run(); 4553 } 4554 4555 #endif 4556 4557 void hci_le_set_own_address_type(uint8_t own_address_type){ 4558 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4559 if (own_address_type == hci_stack->le_own_addr_type) return; 4560 hci_stack->le_own_addr_type = own_address_type; 4561 4562 #ifdef ENABLE_LE_PERIPHERAL 4563 // update advertisement parameters, too 4564 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4565 gap_advertisments_changed(); 4566 #endif 4567 #ifdef ENABLE_LE_CENTRAL 4568 // note: we don't update scan parameters or modify ongoing connection attempts 4569 #endif 4570 } 4571 4572 #endif 4573 4574 uint8_t gap_disconnect(hci_con_handle_t handle){ 4575 hci_connection_t * conn = hci_connection_for_handle(handle); 4576 if (!conn){ 4577 hci_emit_disconnection_complete(handle, 0); 4578 return 0; 4579 } 4580 // ignore if already disconnected 4581 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4582 return 0; 4583 } 4584 conn->state = SEND_DISCONNECT; 4585 hci_run(); 4586 return 0; 4587 } 4588 4589 /** 4590 * @brief Get connection type 4591 * @param con_handle 4592 * @result connection_type 4593 */ 4594 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4595 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4596 if (!conn) return GAP_CONNECTION_INVALID; 4597 switch (conn->address_type){ 4598 case BD_ADDR_TYPE_LE_PUBLIC: 4599 case BD_ADDR_TYPE_LE_RANDOM: 4600 return GAP_CONNECTION_LE; 4601 case BD_ADDR_TYPE_SCO: 4602 return GAP_CONNECTION_SCO; 4603 case BD_ADDR_TYPE_CLASSIC: 4604 return GAP_CONNECTION_ACL; 4605 default: 4606 return GAP_CONNECTION_INVALID; 4607 } 4608 } 4609 4610 #ifdef ENABLE_BLE 4611 4612 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){ 4613 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4614 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4615 4616 conn->le_phy_update_all_phys = all_phys; 4617 conn->le_phy_update_tx_phys = tx_phys; 4618 conn->le_phy_update_rx_phys = rx_phys; 4619 conn->le_phy_update_phy_options = phy_options; 4620 4621 hci_run(); 4622 4623 return 0; 4624 } 4625 4626 #ifdef ENABLE_LE_CENTRAL 4627 /** 4628 * @brief Auto Connection Establishment - Start Connecting to device 4629 * @param address_typ 4630 * @param address 4631 * @returns 0 if ok 4632 */ 4633 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4634 // check capacity 4635 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4636 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4637 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4638 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4639 entry->address_type = address_type; 4640 memcpy(entry->address, address, 6); 4641 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4642 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4643 hci_run(); 4644 return 0; 4645 } 4646 4647 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4648 btstack_linked_list_iterator_t it; 4649 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4650 while (btstack_linked_list_iterator_has_next(&it)){ 4651 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4652 if (entry->address_type != address_type) continue; 4653 if (memcmp(entry->address, address, 6) != 0) continue; 4654 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4655 // remove from controller if already present 4656 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4657 continue; 4658 } 4659 // direclty remove entry from whitelist 4660 btstack_linked_list_iterator_remove(&it); 4661 btstack_memory_whitelist_entry_free(entry); 4662 } 4663 } 4664 4665 /** 4666 * @brief Auto Connection Establishment - Stop Connecting to device 4667 * @param address_typ 4668 * @param address 4669 * @returns 0 if ok 4670 */ 4671 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4672 hci_remove_from_whitelist(address_type, address); 4673 hci_run(); 4674 return 0; 4675 } 4676 4677 /** 4678 * @brief Auto Connection Establishment - Stop everything 4679 * @note Convenience function to stop all active auto connection attempts 4680 */ 4681 void gap_auto_connection_stop_all(void){ 4682 btstack_linked_list_iterator_t it; 4683 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4684 while (btstack_linked_list_iterator_has_next(&it)){ 4685 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4686 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4687 // remove from controller if already present 4688 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4689 continue; 4690 } 4691 // directly remove entry from whitelist 4692 btstack_linked_list_iterator_remove(&it); 4693 btstack_memory_whitelist_entry_free(entry); 4694 } 4695 hci_run(); 4696 } 4697 4698 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 4699 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4700 if (!conn) return 0; 4701 return conn->le_connection_interval; 4702 } 4703 #endif 4704 #endif 4705 4706 #ifdef ENABLE_CLASSIC 4707 /** 4708 * @brief Set Extended Inquiry Response data 4709 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4710 * @note has to be done before stack starts up 4711 */ 4712 void gap_set_extended_inquiry_response(const uint8_t * data){ 4713 hci_stack->eir_data = data; 4714 } 4715 4716 /** 4717 * @brief Start GAP Classic Inquiry 4718 * @param duration in 1.28s units 4719 * @return 0 if ok 4720 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4721 */ 4722 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4723 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 4724 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4725 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4726 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4727 } 4728 hci_stack->inquiry_state = duration_in_1280ms_units; 4729 hci_run(); 4730 return 0; 4731 } 4732 4733 /** 4734 * @brief Stop GAP Classic Inquiry 4735 * @returns 0 if ok 4736 */ 4737 int gap_inquiry_stop(void){ 4738 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4739 // emit inquiry complete event, before it even started 4740 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4741 hci_emit_event(event, sizeof(event), 1); 4742 return 0; 4743 } 4744 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4745 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4746 hci_run(); 4747 return 0; 4748 } 4749 4750 4751 /** 4752 * @brief Remote Name Request 4753 * @param addr 4754 * @param page_scan_repetition_mode 4755 * @param clock_offset only used when bit 15 is set 4756 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4757 */ 4758 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4759 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4760 memcpy(hci_stack->remote_name_addr, addr, 6); 4761 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4762 hci_stack->remote_name_clock_offset = clock_offset; 4763 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4764 hci_run(); 4765 return 0; 4766 } 4767 4768 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4769 hci_stack->gap_pairing_state = state; 4770 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4771 hci_run(); 4772 return 0; 4773 } 4774 4775 /** 4776 * @brief Legacy Pairing Pin Code Response 4777 * @param addr 4778 * @param pin 4779 * @return 0 if ok 4780 */ 4781 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4782 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4783 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 4784 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4785 } 4786 4787 /** 4788 * @brief Abort Legacy Pairing 4789 * @param addr 4790 * @param pin 4791 * @return 0 if ok 4792 */ 4793 int gap_pin_code_negative(bd_addr_t addr){ 4794 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4795 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4796 } 4797 4798 /** 4799 * @brief SSP Passkey Response 4800 * @param addr 4801 * @param passkey 4802 * @return 0 if ok 4803 */ 4804 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4805 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4806 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 4807 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4808 } 4809 4810 /** 4811 * @brief Abort SSP Passkey Entry/Pairing 4812 * @param addr 4813 * @param pin 4814 * @return 0 if ok 4815 */ 4816 int gap_ssp_passkey_negative(bd_addr_t addr){ 4817 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4818 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 4819 } 4820 4821 /** 4822 * @brief Accept SSP Numeric Comparison 4823 * @param addr 4824 * @param passkey 4825 * @return 0 if ok 4826 */ 4827 int gap_ssp_confirmation_response(bd_addr_t addr){ 4828 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4829 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 4830 } 4831 4832 /** 4833 * @brief Abort SSP Numeric Comparison/Pairing 4834 * @param addr 4835 * @param pin 4836 * @return 0 if ok 4837 */ 4838 int gap_ssp_confirmation_negative(bd_addr_t addr){ 4839 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4840 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 4841 } 4842 4843 /** 4844 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4845 * @param inquiry_mode see bluetooth_defines.h 4846 */ 4847 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4848 hci_stack->inquiry_mode = mode; 4849 } 4850 4851 /** 4852 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4853 */ 4854 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4855 hci_stack->sco_voice_setting = voice_setting; 4856 } 4857 4858 /** 4859 * @brief Get SCO Voice Setting 4860 * @return current voice setting 4861 */ 4862 uint16_t hci_get_sco_voice_setting(void){ 4863 return hci_stack->sco_voice_setting; 4864 } 4865 4866 #ifdef ENABLE_CLASSIC 4867 #ifdef ENABLE_SCO_OVER_HCI 4868 static int hci_have_usb_transport(void){ 4869 if (!hci_stack->hci_transport) return 0; 4870 const char * transport_name = hci_stack->hci_transport->name; 4871 if (!transport_name) return 0; 4872 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 4873 } 4874 #endif 4875 #endif 4876 4877 /** @brief Get SCO packet length for current SCO Voice setting 4878 * @note Using SCO packets of the exact length is required for USB transfer 4879 * @return Length of SCO packets in bytes (not audio frames) 4880 */ 4881 int hci_get_sco_packet_length(void){ 4882 int sco_packet_length = 0; 4883 4884 #ifdef ENABLE_CLASSIC 4885 #ifdef ENABLE_SCO_OVER_HCI 4886 4887 // CVSD requires twice as much bytes 4888 int multiplier = hci_stack->sco_voice_setting & 0x0020 ? 2 : 1; 4889 4890 if (hci_have_usb_transport()){ 4891 // see Core Spec for H2 USB Transfer. 4892 // 3 byte SCO header + 24 bytes per connection 4893 sco_packet_length = 3 + 24 * hci_number_sco_connections() * multiplier; 4894 } else { 4895 // 3 byte SCO header + SCO packet size over the air (60 bytes) 4896 sco_packet_length = 3 + 60 * multiplier; 4897 } 4898 #endif 4899 #endif 4900 return sco_packet_length; 4901 } 4902 4903 /** 4904 * @brief Sets the master/slave policy 4905 * @param policy (0: attempt to become master, 1: let connecting device decide) 4906 */ 4907 void hci_set_master_slave_policy(uint8_t policy){ 4908 hci_stack->master_slave_policy = policy; 4909 } 4910 4911 #endif 4912 4913 HCI_STATE hci_get_state(void){ 4914 return hci_stack->state; 4915 } 4916 4917 4918 /** 4919 * @brief Set callback for Bluetooth Hardware Error 4920 */ 4921 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 4922 hci_stack->hardware_error_callback = fn; 4923 } 4924 4925 void hci_disconnect_all(void){ 4926 btstack_linked_list_iterator_t it; 4927 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4928 while (btstack_linked_list_iterator_has_next(&it)){ 4929 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4930 if (con->state == SENT_DISCONNECT) continue; 4931 con->state = SEND_DISCONNECT; 4932 } 4933 hci_run(); 4934 } 4935 4936 uint16_t hci_get_manufacturer(void){ 4937 return hci_stack->manufacturer; 4938 } 4939 4940 #ifdef ENABLE_BLE 4941 4942 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 4943 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 4944 if (!hci_con) return NULL; 4945 return &hci_con->sm_connection; 4946 } 4947 4948 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 4949 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 4950 4951 int gap_encryption_key_size(hci_con_handle_t con_handle){ 4952 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4953 if (!sm_conn) return 0; // wrong connection 4954 if (!sm_conn->sm_connection_encrypted) return 0; 4955 return sm_conn->sm_actual_encryption_key_size; 4956 } 4957 4958 int gap_authenticated(hci_con_handle_t con_handle){ 4959 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4960 if (!sm_conn) return 0; // wrong connection 4961 if (!sm_conn->sm_connection_encrypted) return 0; // unencrypted connection cannot be authenticated 4962 return sm_conn->sm_connection_authenticated; 4963 } 4964 4965 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 4966 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4967 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 4968 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 4969 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 4970 return sm_conn->sm_connection_authorization_state; 4971 } 4972 #endif 4973 4974 #ifdef ENABLE_CLASSIC 4975 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){ 4976 hci_connection_t * conn = hci_connection_for_handle(con_handle); 4977 if (!conn) return GAP_CONNECTION_INVALID; 4978 conn->sniff_min_interval = sniff_min_interval; 4979 conn->sniff_max_interval = sniff_max_interval; 4980 conn->sniff_attempt = sniff_attempt; 4981 conn->sniff_timeout = sniff_timeout; 4982 hci_run(); 4983 return 0; 4984 } 4985 4986 /** 4987 * @brief Exit Sniff mode 4988 * @param con_handle 4989 @ @return 0 if ok 4990 */ 4991 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 4992 hci_connection_t * conn = hci_connection_for_handle(con_handle); 4993 if (!conn) return GAP_CONNECTION_INVALID; 4994 conn->sniff_min_interval = 0xffff; 4995 hci_run(); 4996 return 0; 4997 } 4998 #endif 4999