1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #endif 63 64 #include <stdarg.h> 65 #include <string.h> 66 #include <stdio.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 #define HCI_RESET_RESEND_TIMEOUT_MS 200 98 99 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 100 #ifndef GAP_INQUIRY_MAX_NAME_LEN 101 #define GAP_INQUIRY_MAX_NAME_LEN 32 102 #endif 103 104 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 105 #define GAP_INQUIRY_DURATION_MIN 0x01 106 #define GAP_INQUIRY_DURATION_MAX 0x30 107 #define GAP_INQUIRY_STATE_ACTIVE 0x80 108 #define GAP_INQUIRY_STATE_IDLE 0 109 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 110 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 111 112 // GAP Remote Name Request 113 #define GAP_REMOTE_NAME_STATE_IDLE 0 114 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 115 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 116 117 // GAP Pairing 118 #define GAP_PAIRING_STATE_IDLE 0 119 #define GAP_PAIRING_STATE_SEND_PIN 1 120 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 121 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 122 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 123 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 124 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 125 126 127 // prototypes 128 #ifdef ENABLE_CLASSIC 129 static void hci_update_scan_enable(void); 130 static void hci_emit_discoverable_enabled(uint8_t enabled); 131 static int hci_local_ssp_activated(void); 132 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 133 static void hci_notify_if_sco_can_send_now(void); 134 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 135 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 136 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 137 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 138 static void hci_connection_timestamp(hci_connection_t *connection); 139 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 140 static void gap_inquiry_explode(uint8_t * packet); 141 #endif 142 143 static int hci_power_control_on(void); 144 static void hci_power_control_off(void); 145 static void hci_state_reset(void); 146 static void hci_emit_transport_packet_sent(void); 147 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 148 static void hci_emit_nr_connections_changed(void); 149 static void hci_emit_hci_open_failed(void); 150 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 151 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 152 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 153 static void hci_run(void); 154 static int hci_is_le_connection(hci_connection_t * connection); 155 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 156 157 #ifdef ENABLE_BLE 158 #ifdef ENABLE_LE_CENTRAL 159 // called from test/ble_client/advertising_data_parser.c 160 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 161 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 162 static hci_connection_t * gap_get_outgoing_connection(void); 163 #endif 164 #endif 165 166 // the STACK is here 167 #ifndef HAVE_MALLOC 168 static hci_stack_t hci_stack_static; 169 #endif 170 static hci_stack_t * hci_stack = NULL; 171 172 #ifdef ENABLE_CLASSIC 173 // default name 174 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 175 176 // test helper 177 static uint8_t disable_l2cap_timeouts = 0; 178 #endif 179 180 /** 181 * create connection for given address 182 * 183 * @return connection OR NULL, if no memory left 184 */ 185 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 186 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 187 hci_connection_t * conn = btstack_memory_hci_connection_get(); 188 if (!conn) return NULL; 189 bd_addr_copy(conn->address, addr); 190 conn->address_type = addr_type; 191 conn->con_handle = 0xffff; 192 conn->authentication_flags = AUTH_FLAGS_NONE; 193 conn->bonding_flags = 0; 194 conn->requested_security_level = LEVEL_0; 195 #ifdef ENABLE_CLASSIC 196 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 197 btstack_run_loop_set_timer_context(&conn->timeout, conn); 198 hci_connection_timestamp(conn); 199 #endif 200 conn->acl_recombination_length = 0; 201 conn->acl_recombination_pos = 0; 202 conn->num_acl_packets_sent = 0; 203 conn->num_sco_packets_sent = 0; 204 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 205 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 206 return conn; 207 } 208 209 210 /** 211 * get le connection parameter range 212 * 213 * @return le connection parameter range struct 214 */ 215 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 216 *range = hci_stack->le_connection_parameter_range; 217 } 218 219 /** 220 * set le connection parameter range 221 * 222 */ 223 224 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 225 hci_stack->le_connection_parameter_range = *range; 226 } 227 228 /** 229 * @brief Test if connection parameters are inside in existing rage 230 * @param conn_interval_min (unit: 1.25ms) 231 * @param conn_interval_max (unit: 1.25ms) 232 * @param conn_latency 233 * @param supervision_timeout (unit: 10ms) 234 * @returns 1 if included 235 */ 236 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){ 237 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 238 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 239 240 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 241 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 242 243 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 244 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 245 246 return 1; 247 } 248 249 /** 250 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 251 * @note: default: 1 252 * @param max_peripheral_connections 253 */ 254 #ifdef ENABLE_LE_PERIPHERAL 255 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 256 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 257 } 258 #endif 259 260 /** 261 * get hci connections iterator 262 * 263 * @return hci connections iterator 264 */ 265 266 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 267 btstack_linked_list_iterator_init(it, &hci_stack->connections); 268 } 269 270 /** 271 * get connection for a given handle 272 * 273 * @return connection OR NULL, if not found 274 */ 275 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 276 btstack_linked_list_iterator_t it; 277 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 278 while (btstack_linked_list_iterator_has_next(&it)){ 279 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 280 if ( item->con_handle == con_handle ) { 281 return item; 282 } 283 } 284 return NULL; 285 } 286 287 /** 288 * get connection for given address 289 * 290 * @return connection OR NULL, if not found 291 */ 292 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 293 btstack_linked_list_iterator_t it; 294 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 295 while (btstack_linked_list_iterator_has_next(&it)){ 296 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 297 if (connection->address_type != addr_type) continue; 298 if (memcmp(addr, connection->address, 6) != 0) continue; 299 return connection; 300 } 301 return NULL; 302 } 303 304 305 #ifdef ENABLE_CLASSIC 306 307 #ifdef ENABLE_SCO_OVER_HCI 308 static int hci_number_sco_connections(void){ 309 int connections = 0; 310 btstack_linked_list_iterator_t it; 311 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 312 while (btstack_linked_list_iterator_has_next(&it)){ 313 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 314 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 315 connections++; 316 } 317 return connections; 318 } 319 #endif 320 321 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 322 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 323 #ifdef HAVE_EMBEDDED_TICK 324 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 325 // connections might be timed out 326 hci_emit_l2cap_check_timeout(connection); 327 } 328 #else 329 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 330 // connections might be timed out 331 hci_emit_l2cap_check_timeout(connection); 332 } 333 #endif 334 } 335 336 static void hci_connection_timestamp(hci_connection_t *connection){ 337 #ifdef HAVE_EMBEDDED_TICK 338 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 339 #else 340 connection->timestamp = btstack_run_loop_get_time_ms(); 341 #endif 342 } 343 344 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 345 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 346 } 347 348 349 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 350 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 351 } 352 353 /** 354 * add authentication flags and reset timer 355 * @note: assumes classic connection 356 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 357 */ 358 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 359 bd_addr_t addr; 360 reverse_bd_addr(bd_addr, addr); 361 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 362 if (conn) { 363 connectionSetAuthenticationFlags(conn, flags); 364 hci_connection_timestamp(conn); 365 } 366 } 367 368 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 369 hci_connection_t * conn = hci_connection_for_handle(handle); 370 if (!conn) return 0; 371 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 372 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 373 return 0; 374 } 375 376 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 377 if (!hci_stack->link_key_db) return; 378 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 379 hci_stack->link_key_db->delete_link_key(addr); 380 } 381 382 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 383 if (!hci_stack->link_key_db) return; 384 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 385 hci_stack->link_key_db->put_link_key(addr, link_key, type); 386 } 387 388 void gap_delete_all_link_keys(void){ 389 bd_addr_t addr; 390 link_key_t link_key; 391 link_key_type_t type; 392 btstack_link_key_iterator_t it; 393 int ok = gap_link_key_iterator_init(&it); 394 if (!ok) { 395 log_error("could not initialize iterator"); 396 return; 397 } 398 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 399 gap_drop_link_key_for_bd_addr(addr); 400 } 401 gap_link_key_iterator_done(&it); 402 } 403 404 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 405 if (!hci_stack->link_key_db) return 0; 406 if (!hci_stack->link_key_db->iterator_init) return 0; 407 return hci_stack->link_key_db->iterator_init(it); 408 } 409 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){ 410 if (!hci_stack->link_key_db) return 0; 411 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 412 } 413 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 414 if (!hci_stack->link_key_db) return; 415 hci_stack->link_key_db->iterator_done(it); 416 } 417 #endif 418 419 static int hci_is_le_connection(hci_connection_t * connection){ 420 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 421 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 422 } 423 424 /** 425 * count connections 426 */ 427 static int nr_hci_connections(void){ 428 int count = 0; 429 btstack_linked_item_t *it; 430 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 431 return count; 432 } 433 434 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 435 436 unsigned int num_packets_sent_classic = 0; 437 unsigned int num_packets_sent_le = 0; 438 439 btstack_linked_item_t *it; 440 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 441 hci_connection_t * connection = (hci_connection_t *) it; 442 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 443 num_packets_sent_classic += connection->num_acl_packets_sent; 444 } else { 445 num_packets_sent_le += connection->num_acl_packets_sent; 446 } 447 } 448 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 449 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 450 int free_slots_le = 0; 451 452 if (free_slots_classic < 0){ 453 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); 454 return 0; 455 } 456 457 if (hci_stack->le_acl_packets_total_num){ 458 // if we have LE slots, they are used 459 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 460 if (free_slots_le < 0){ 461 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); 462 return 0; 463 } 464 } else { 465 // otherwise, classic slots are used for LE, too 466 free_slots_classic -= num_packets_sent_le; 467 if (free_slots_classic < 0){ 468 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); 469 return 0; 470 } 471 } 472 473 switch (address_type){ 474 case BD_ADDR_TYPE_UNKNOWN: 475 log_error("hci_number_free_acl_slots: unknown address type"); 476 return 0; 477 478 case BD_ADDR_TYPE_CLASSIC: 479 return free_slots_classic; 480 481 default: 482 if (hci_stack->le_acl_packets_total_num){ 483 return free_slots_le; 484 } 485 return free_slots_classic; 486 } 487 } 488 489 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 490 // get connection type 491 hci_connection_t * connection = hci_connection_for_handle(con_handle); 492 if (!connection){ 493 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 494 return 0; 495 } 496 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 497 } 498 499 #ifdef ENABLE_CLASSIC 500 static int hci_number_free_sco_slots(void){ 501 unsigned int num_sco_packets_sent = 0; 502 btstack_linked_item_t *it; 503 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 504 hci_connection_t * connection = (hci_connection_t *) it; 505 num_sco_packets_sent += connection->num_sco_packets_sent; 506 } 507 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 508 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 509 return 0; 510 } 511 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 512 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 513 } 514 #endif 515 516 // only used to send HCI Host Number Completed Packets 517 static int hci_can_send_comand_packet_transport(void){ 518 if (hci_stack->hci_packet_buffer_reserved) return 0; 519 520 // check for async hci transport implementations 521 if (hci_stack->hci_transport->can_send_packet_now){ 522 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 523 return 0; 524 } 525 } 526 return 1; 527 } 528 529 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 530 int hci_can_send_command_packet_now(void){ 531 if (hci_can_send_comand_packet_transport() == 0) return 0; 532 return hci_stack->num_cmd_packets > 0; 533 } 534 535 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 536 // check for async hci transport implementations 537 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 538 return hci_stack->hci_transport->can_send_packet_now(packet_type); 539 } 540 541 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 542 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 543 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 544 } 545 546 int hci_can_send_acl_le_packet_now(void){ 547 if (hci_stack->hci_packet_buffer_reserved) return 0; 548 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 549 } 550 551 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 552 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 553 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 554 } 555 556 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 557 if (hci_stack->hci_packet_buffer_reserved) return 0; 558 return hci_can_send_prepared_acl_packet_now(con_handle); 559 } 560 561 #ifdef ENABLE_CLASSIC 562 int hci_can_send_acl_classic_packet_now(void){ 563 if (hci_stack->hci_packet_buffer_reserved) return 0; 564 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 565 } 566 567 int hci_can_send_prepared_sco_packet_now(void){ 568 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 569 if (!hci_stack->synchronous_flow_control_enabled) return 1; 570 return hci_number_free_sco_slots() > 0; 571 } 572 573 int hci_can_send_sco_packet_now(void){ 574 if (hci_stack->hci_packet_buffer_reserved) return 0; 575 return hci_can_send_prepared_sco_packet_now(); 576 } 577 578 void hci_request_sco_can_send_now_event(void){ 579 hci_stack->sco_waiting_for_can_send_now = 1; 580 hci_notify_if_sco_can_send_now(); 581 } 582 #endif 583 584 // used for internal checks in l2cap.c 585 int hci_is_packet_buffer_reserved(void){ 586 return hci_stack->hci_packet_buffer_reserved; 587 } 588 589 // reserves outgoing packet buffer. @returns 1 if successful 590 int hci_reserve_packet_buffer(void){ 591 if (hci_stack->hci_packet_buffer_reserved) { 592 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 593 return 0; 594 } 595 hci_stack->hci_packet_buffer_reserved = 1; 596 return 1; 597 } 598 599 void hci_release_packet_buffer(void){ 600 hci_stack->hci_packet_buffer_reserved = 0; 601 } 602 603 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 604 static int hci_transport_synchronous(void){ 605 return hci_stack->hci_transport->can_send_packet_now == NULL; 606 } 607 608 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 609 610 // 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); 611 612 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 613 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 614 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 615 max_acl_data_packet_length = hci_stack->le_data_packets_length; 616 } 617 618 // testing: reduce buffer to minimum 619 // max_acl_data_packet_length = 52; 620 621 log_debug("hci_send_acl_packet_fragments entered"); 622 623 int err; 624 // multiple packets could be send on a synchronous HCI transport 625 while (1){ 626 627 log_debug("hci_send_acl_packet_fragments loop entered"); 628 629 // get current data 630 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 631 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 632 int more_fragments = 0; 633 634 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 635 if (current_acl_data_packet_length > max_acl_data_packet_length){ 636 more_fragments = 1; 637 current_acl_data_packet_length = max_acl_data_packet_length; 638 } 639 640 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 641 if (acl_header_pos > 0){ 642 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 643 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 644 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 645 } 646 647 // update header len 648 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 649 650 // count packet 651 connection->num_acl_packets_sent++; 652 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 653 654 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 655 if (more_fragments){ 656 // update start of next fragment to send 657 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 658 } else { 659 // done 660 hci_stack->acl_fragmentation_pos = 0; 661 hci_stack->acl_fragmentation_total_size = 0; 662 } 663 664 // send packet 665 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 666 const int size = current_acl_data_packet_length + 4; 667 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 668 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 669 670 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 671 672 // done yet? 673 if (!more_fragments) break; 674 675 // can send more? 676 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 677 } 678 679 log_debug("hci_send_acl_packet_fragments loop over"); 680 681 // release buffer now for synchronous transport 682 if (hci_transport_synchronous()){ 683 hci_release_packet_buffer(); 684 hci_emit_transport_packet_sent(); 685 } 686 687 return err; 688 } 689 690 // pre: caller has reserved the packet buffer 691 int hci_send_acl_packet_buffer(int size){ 692 693 // log_info("hci_send_acl_packet_buffer size %u", size); 694 695 if (!hci_stack->hci_packet_buffer_reserved) { 696 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 697 return 0; 698 } 699 700 uint8_t * packet = hci_stack->hci_packet_buffer; 701 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 702 703 // check for free places on Bluetooth module 704 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 705 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 706 hci_release_packet_buffer(); 707 hci_emit_transport_packet_sent(); 708 return BTSTACK_ACL_BUFFERS_FULL; 709 } 710 711 hci_connection_t *connection = hci_connection_for_handle( con_handle); 712 if (!connection) { 713 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 714 hci_release_packet_buffer(); 715 hci_emit_transport_packet_sent(); 716 return 0; 717 } 718 719 #ifdef ENABLE_CLASSIC 720 hci_connection_timestamp(connection); 721 #endif 722 723 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 724 725 // setup data 726 hci_stack->acl_fragmentation_total_size = size; 727 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 728 729 return hci_send_acl_packet_fragments(connection); 730 } 731 732 #ifdef ENABLE_CLASSIC 733 // pre: caller has reserved the packet buffer 734 int hci_send_sco_packet_buffer(int size){ 735 736 // log_info("hci_send_acl_packet_buffer size %u", size); 737 738 if (!hci_stack->hci_packet_buffer_reserved) { 739 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 740 return 0; 741 } 742 743 uint8_t * packet = hci_stack->hci_packet_buffer; 744 745 // skip checks in loopback mode 746 if (!hci_stack->loopback_mode){ 747 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 748 749 // check for free places on Bluetooth module 750 if (!hci_can_send_prepared_sco_packet_now()) { 751 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 752 hci_release_packet_buffer(); 753 hci_emit_transport_packet_sent(); 754 return BTSTACK_ACL_BUFFERS_FULL; 755 } 756 757 // track send packet in connection struct 758 hci_connection_t *connection = hci_connection_for_handle( con_handle); 759 if (!connection) { 760 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 761 hci_release_packet_buffer(); 762 hci_emit_transport_packet_sent(); 763 return 0; 764 } 765 connection->num_sco_packets_sent++; 766 } 767 768 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 769 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 770 771 if (hci_transport_synchronous()){ 772 hci_release_packet_buffer(); 773 hci_emit_transport_packet_sent(); 774 } 775 776 return err; 777 } 778 #endif 779 780 static void acl_handler(uint8_t *packet, int size){ 781 782 // log_info("acl_handler: size %u", size); 783 784 // get info 785 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 786 hci_connection_t *conn = hci_connection_for_handle(con_handle); 787 uint8_t acl_flags = READ_ACL_FLAGS(packet); 788 uint16_t acl_length = READ_ACL_LENGTH(packet); 789 790 // ignore non-registered handle 791 if (!conn){ 792 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 793 return; 794 } 795 796 // assert packet is complete 797 if (acl_length + 4 != size){ 798 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 799 return; 800 } 801 802 #ifdef ENABLE_CLASSIC 803 // update idle timestamp 804 hci_connection_timestamp(conn); 805 #endif 806 807 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 808 hci_stack->host_completed_packets = 1; 809 conn->num_packets_completed++; 810 #endif 811 812 // handle different packet types 813 switch (acl_flags & 0x03) { 814 815 case 0x01: // continuation fragment 816 817 // sanity checks 818 if (conn->acl_recombination_pos == 0) { 819 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 820 return; 821 } 822 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 823 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 824 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 825 conn->acl_recombination_pos = 0; 826 return; 827 } 828 829 // append fragment payload (header already stored) 830 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 831 conn->acl_recombination_pos += acl_length; 832 833 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 834 // conn->acl_recombination_pos, conn->acl_recombination_length); 835 836 // forward complete L2CAP packet if complete. 837 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 838 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 839 // reset recombination buffer 840 conn->acl_recombination_length = 0; 841 conn->acl_recombination_pos = 0; 842 } 843 break; 844 845 case 0x02: { // first fragment 846 847 // sanity check 848 if (conn->acl_recombination_pos) { 849 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 850 conn->acl_recombination_pos = 0; 851 } 852 853 // peek into L2CAP packet! 854 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 855 856 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 857 858 // compare fragment size to L2CAP packet size 859 if (acl_length >= l2cap_length + 4){ 860 // forward fragment as L2CAP packet 861 hci_emit_acl_packet(packet, acl_length + 4); 862 } else { 863 864 if (acl_length > HCI_ACL_BUFFER_SIZE){ 865 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 866 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 867 return; 868 } 869 870 // store first fragment and tweak acl length for complete package 871 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 872 conn->acl_recombination_pos = acl_length + 4; 873 conn->acl_recombination_length = l2cap_length; 874 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 875 } 876 break; 877 878 } 879 default: 880 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 881 return; 882 } 883 884 // execute main loop 885 hci_run(); 886 } 887 888 static void hci_shutdown_connection(hci_connection_t *conn){ 889 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 890 891 #ifdef ENABLE_CLASSIC 892 #ifdef ENABLE_SCO_OVER_HCI 893 int addr_type = conn->address_type; 894 #endif 895 #endif 896 897 btstack_run_loop_remove_timer(&conn->timeout); 898 899 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 900 btstack_memory_hci_connection_free( conn ); 901 902 // now it's gone 903 hci_emit_nr_connections_changed(); 904 905 #ifdef ENABLE_CLASSIC 906 #ifdef ENABLE_SCO_OVER_HCI 907 // update SCO 908 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 909 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 910 } 911 #endif 912 #endif 913 } 914 915 #ifdef ENABLE_CLASSIC 916 917 static const uint16_t packet_type_sizes[] = { 918 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 919 HCI_ACL_DH1_SIZE, 0, 0, 0, 920 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 921 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 922 }; 923 static const uint8_t packet_type_feature_requirement_bit[] = { 924 0, // 3 slot packets 925 1, // 5 slot packets 926 25, // EDR 2 mpbs 927 26, // EDR 3 mbps 928 39, // 3 slot EDR packts 929 40, // 5 slot EDR packet 930 }; 931 static const uint16_t packet_type_feature_packet_mask[] = { 932 0x0f00, // 3 slot packets 933 0xf000, // 5 slot packets 934 0x1102, // EDR 2 mpbs 935 0x2204, // EDR 3 mbps 936 0x0300, // 3 slot EDR packts 937 0x3000, // 5 slot EDR packet 938 }; 939 940 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 941 // enable packet types based on size 942 uint16_t packet_types = 0; 943 unsigned int i; 944 for (i=0;i<16;i++){ 945 if (packet_type_sizes[i] == 0) continue; 946 if (packet_type_sizes[i] <= buffer_size){ 947 packet_types |= 1 << i; 948 } 949 } 950 // disable packet types due to missing local supported features 951 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 952 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 953 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 954 if (feature_set) continue; 955 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 956 packet_types &= ~packet_type_feature_packet_mask[i]; 957 } 958 // flip bits for "may not be used" 959 packet_types ^= 0x3306; 960 return packet_types; 961 } 962 963 uint16_t hci_usable_acl_packet_types(void){ 964 return hci_stack->packet_types; 965 } 966 #endif 967 968 uint8_t* hci_get_outgoing_packet_buffer(void){ 969 // hci packet buffer is >= acl data packet length 970 return hci_stack->hci_packet_buffer; 971 } 972 973 uint16_t hci_max_acl_data_packet_length(void){ 974 return hci_stack->acl_data_packet_length; 975 } 976 977 #ifdef ENABLE_CLASSIC 978 int hci_extended_sco_link_supported(void){ 979 // No. 31, byte 3, bit 7 980 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 981 } 982 #endif 983 984 int hci_non_flushable_packet_boundary_flag_supported(void){ 985 // No. 54, byte 6, bit 6 986 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 987 } 988 989 static int gap_ssp_supported(void){ 990 // No. 51, byte 6, bit 3 991 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 992 } 993 994 static int hci_classic_supported(void){ 995 #ifdef ENABLE_CLASSIC 996 // No. 37, byte 4, bit 5, = No BR/EDR Support 997 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 998 #else 999 return 0; 1000 #endif 1001 } 1002 1003 static int hci_le_supported(void){ 1004 #ifdef ENABLE_BLE 1005 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1006 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1007 #else 1008 return 0; 1009 #endif 1010 } 1011 1012 #ifdef ENABLE_BLE 1013 1014 /** 1015 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1016 */ 1017 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1018 *addr_type = hci_stack->le_own_addr_type; 1019 if (hci_stack->le_own_addr_type){ 1020 memcpy(addr, hci_stack->le_random_address, 6); 1021 } else { 1022 memcpy(addr, hci_stack->local_bd_addr, 6); 1023 } 1024 } 1025 1026 #ifdef ENABLE_LE_CENTRAL 1027 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1028 1029 int offset = 3; 1030 int num_reports = packet[offset]; 1031 offset += 1; 1032 1033 int i; 1034 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1035 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1036 for (i=0; i<num_reports && offset < size;i++){ 1037 uint8_t data_length = btstack_min( packet[offset + 8], LE_ADVERTISING_DATA_SIZE); 1038 uint8_t event_size = 10 + data_length; 1039 int pos = 0; 1040 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1041 event[pos++] = event_size; 1042 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 1043 offset += 8; 1044 pos += 8; 1045 event[pos++] = packet[offset + 1 + data_length]; // rssi 1046 event[pos++] = packet[offset++]; //data_length; 1047 memcpy(&event[pos], &packet[offset], data_length); 1048 pos += data_length; 1049 offset += data_length + 1; // rssi 1050 hci_emit_event(event, pos, 1); 1051 } 1052 } 1053 #endif 1054 #endif 1055 1056 #ifdef ENABLE_BLE 1057 #ifdef ENABLE_LE_PERIPHERAL 1058 static void hci_reenable_advertisements_if_needed(void){ 1059 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1060 // get number of active le slave connections 1061 int num_slave_connections = 0; 1062 btstack_linked_list_iterator_t it; 1063 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1064 while (btstack_linked_list_iterator_has_next(&it)){ 1065 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1066 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1067 if (con->state != OPEN) continue; 1068 if (con->role != HCI_ROLE_SLAVE) continue; 1069 if (!hci_is_le_connection(con)) continue; 1070 num_slave_connections++; 1071 } 1072 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1073 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1074 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1075 } 1076 } 1077 } 1078 #endif 1079 #endif 1080 1081 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1082 1083 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1084 if (!hci_stack->config) return 0; 1085 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1086 // Limit baud rate for Broadcom chipsets to 3 mbps 1087 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 1088 baud_rate = 3000000; 1089 } 1090 return baud_rate; 1091 } 1092 1093 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1094 UNUSED(ds); 1095 1096 switch (hci_stack->substate){ 1097 case HCI_INIT_W4_SEND_RESET: 1098 log_info("Resend HCI Reset"); 1099 hci_stack->substate = HCI_INIT_SEND_RESET; 1100 hci_stack->num_cmd_packets = 1; 1101 hci_run(); 1102 break; 1103 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1104 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1105 if (hci_stack->hci_transport->reset_link){ 1106 hci_stack->hci_transport->reset_link(); 1107 } 1108 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1109 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1110 log_info("Resend HCI Reset - CSR Warm Boot"); 1111 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1112 hci_stack->num_cmd_packets = 1; 1113 hci_run(); 1114 break; 1115 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1116 if (hci_stack->hci_transport->set_baudrate){ 1117 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1118 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1119 hci_stack->hci_transport->set_baudrate(baud_rate); 1120 } 1121 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1122 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1123 if (hci_stack->hci_transport->reset_link){ 1124 log_info("Link Reset"); 1125 hci_stack->hci_transport->reset_link(); 1126 } 1127 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1128 hci_run(); 1129 } 1130 break; 1131 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1132 // otherwise continue 1133 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1134 hci_send_cmd(&hci_read_local_supported_commands); 1135 break; 1136 default: 1137 break; 1138 } 1139 } 1140 #endif 1141 1142 static void hci_initializing_next_state(void){ 1143 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1144 } 1145 1146 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_PERIPHERAL) 1147 static void hci_replace_bd_addr_placeholder(uint8_t * data, uint16_t size){ 1148 const int bd_addr_string_len = 17; 1149 int i = 0; 1150 while (i < size - bd_addr_string_len){ 1151 if (memcmp(&data[i], "00:00:00:00:00:00", bd_addr_string_len)) { 1152 i++; 1153 continue; 1154 } 1155 // set real address 1156 memcpy(&data[i], bd_addr_to_str(hci_stack->local_bd_addr), bd_addr_string_len); 1157 i += bd_addr_string_len; 1158 } 1159 } 1160 #endif 1161 1162 // assumption: hci_can_send_command_packet_now() == true 1163 static void hci_initializing_run(void){ 1164 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1165 switch (hci_stack->substate){ 1166 case HCI_INIT_SEND_RESET: 1167 hci_state_reset(); 1168 1169 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1170 // prepare reset if command complete not received in 100ms 1171 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1172 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1173 btstack_run_loop_add_timer(&hci_stack->timeout); 1174 #endif 1175 // send command 1176 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1177 hci_send_cmd(&hci_reset); 1178 break; 1179 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1180 hci_send_cmd(&hci_read_local_version_information); 1181 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1182 break; 1183 case HCI_INIT_SEND_READ_LOCAL_NAME: 1184 hci_send_cmd(&hci_read_local_name); 1185 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1186 break; 1187 1188 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1189 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1190 hci_state_reset(); 1191 // prepare reset if command complete not received in 100ms 1192 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1193 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1194 btstack_run_loop_add_timer(&hci_stack->timeout); 1195 // send command 1196 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1197 hci_send_cmd(&hci_reset); 1198 break; 1199 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1200 hci_state_reset(); 1201 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1202 hci_send_cmd(&hci_reset); 1203 break; 1204 case HCI_INIT_SEND_BAUD_CHANGE: { 1205 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1206 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1207 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1208 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1209 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1210 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1211 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1212 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1213 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1214 btstack_run_loop_add_timer(&hci_stack->timeout); 1215 } 1216 break; 1217 } 1218 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1219 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1220 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1221 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1222 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1223 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1224 break; 1225 } 1226 case HCI_INIT_CUSTOM_INIT: 1227 // Custom initialization 1228 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1229 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1230 if (valid_cmd){ 1231 int size = 3 + hci_stack->hci_packet_buffer[2]; 1232 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1233 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1234 switch (valid_cmd) { 1235 case BTSTACK_CHIPSET_VALID_COMMAND: 1236 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1237 break; 1238 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1239 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1240 log_info("CSR Warm Boot"); 1241 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1242 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1243 btstack_run_loop_add_timer(&hci_stack->timeout); 1244 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1245 && hci_stack->config 1246 && hci_stack->chipset 1247 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1248 && hci_stack->hci_transport->set_baudrate 1249 && hci_transport_uart_get_main_baud_rate()){ 1250 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1251 } else { 1252 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1253 } 1254 break; 1255 default: 1256 // should not get here 1257 break; 1258 } 1259 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1260 break; 1261 } 1262 log_info("Init script done"); 1263 1264 // Init script download on Broadcom chipsets causes: 1265 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION 1266 || hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA){ 1267 1268 // - baud rate to reset, restore UART baud rate if needed 1269 int need_baud_change = hci_stack->config 1270 && hci_stack->chipset 1271 && hci_stack->chipset->set_baudrate_command 1272 && hci_stack->hci_transport->set_baudrate 1273 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1274 if (need_baud_change) { 1275 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1276 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1277 hci_stack->hci_transport->set_baudrate(baud_rate); 1278 } 1279 1280 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1281 // -> Work around: wait a few milliseconds here. 1282 log_info("BCM delay after init script"); 1283 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1284 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1285 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1286 btstack_run_loop_add_timer(&hci_stack->timeout); 1287 break; 1288 } 1289 } 1290 // otherwise continue 1291 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1292 hci_send_cmd(&hci_read_local_supported_commands); 1293 break; 1294 case HCI_INIT_SET_BD_ADDR: 1295 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1296 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1297 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1298 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1299 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1300 break; 1301 #endif 1302 1303 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1304 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1305 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1306 hci_send_cmd(&hci_read_local_supported_commands); 1307 break; 1308 case HCI_INIT_READ_BD_ADDR: 1309 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1310 hci_send_cmd(&hci_read_bd_addr); 1311 break; 1312 case HCI_INIT_READ_BUFFER_SIZE: 1313 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1314 hci_send_cmd(&hci_read_buffer_size); 1315 break; 1316 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1317 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1318 hci_send_cmd(&hci_read_local_supported_features); 1319 break; 1320 1321 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1322 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1323 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1324 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1325 break; 1326 case HCI_INIT_HOST_BUFFER_SIZE: 1327 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1328 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1329 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1330 break; 1331 #endif 1332 1333 case HCI_INIT_SET_EVENT_MASK: 1334 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1335 if (hci_le_supported()){ 1336 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1337 } else { 1338 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1339 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1340 } 1341 break; 1342 1343 #ifdef ENABLE_CLASSIC 1344 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1345 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1346 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1347 break; 1348 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1349 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1350 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1351 break; 1352 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1353 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1354 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1355 break; 1356 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1357 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1358 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1359 break; 1360 case HCI_INIT_WRITE_LOCAL_NAME: { 1361 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1362 hci_reserve_packet_buffer(); 1363 uint8_t * packet = hci_stack->hci_packet_buffer; 1364 // construct HCI Command and send 1365 uint16_t opcode = hci_write_local_name.opcode; 1366 hci_stack->last_cmd_opcode = opcode; 1367 packet[0] = opcode & 0xff; 1368 packet[1] = opcode >> 8; 1369 packet[2] = DEVICE_NAME_LEN; 1370 memset(&packet[3], 0, DEVICE_NAME_LEN); 1371 memcpy(&packet[3], hci_stack->local_name, strlen(hci_stack->local_name)); 1372 // expand '00:00:00:00:00:00' in name with bd_addr 1373 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1374 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1375 break; 1376 } 1377 case HCI_INIT_WRITE_EIR_DATA: { 1378 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1379 hci_reserve_packet_buffer(); 1380 uint8_t * packet = hci_stack->hci_packet_buffer; 1381 // construct HCI Command and send 1382 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1383 hci_stack->last_cmd_opcode = opcode; 1384 packet[0] = opcode & 0xff; 1385 packet[1] = opcode >> 8; 1386 packet[2] = 1 + 240; 1387 packet[3] = 0; // FEC not required 1388 if (hci_stack->eir_data){ 1389 memcpy(&packet[4], hci_stack->eir_data, 240); 1390 } else { 1391 memset(&packet[4], 0, 240); 1392 int name_len = strlen(hci_stack->local_name); 1393 packet[4] = name_len + 1; 1394 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1395 memcpy(&packet[6], hci_stack->local_name, name_len); 1396 } 1397 // expand '00:00:00:00:00:00' in name with bd_addr 1398 hci_replace_bd_addr_placeholder(&packet[4], 240); 1399 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1400 break; 1401 } 1402 case HCI_INIT_WRITE_INQUIRY_MODE: 1403 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1404 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1405 break; 1406 case HCI_INIT_WRITE_SCAN_ENABLE: 1407 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1408 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1409 break; 1410 // only sent if ENABLE_SCO_OVER_HCI is defined 1411 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1412 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1413 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1414 break; 1415 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1416 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1417 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1418 break; 1419 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1420 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1421 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1422 log_info("BCM: Route SCO data via HCI transport"); 1423 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1424 break; 1425 1426 #endif 1427 #ifdef ENABLE_BLE 1428 // LE INIT 1429 case HCI_INIT_LE_READ_BUFFER_SIZE: 1430 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1431 hci_send_cmd(&hci_le_read_buffer_size); 1432 break; 1433 case HCI_INIT_LE_SET_EVENT_MASK: 1434 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1435 hci_send_cmd(&hci_le_set_event_mask, 0x1FF, 0x0); 1436 break; 1437 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1438 // LE Supported Host = 1, Simultaneous Host = 0 1439 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1440 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1441 break; 1442 #endif 1443 1444 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1445 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1446 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1447 hci_send_cmd(&hci_le_read_maximum_data_length); 1448 break; 1449 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1450 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1451 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1452 break; 1453 #endif 1454 1455 #ifdef ENABLE_LE_CENTRAL 1456 case HCI_INIT_READ_WHITE_LIST_SIZE: 1457 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1458 hci_send_cmd(&hci_le_read_white_list_size); 1459 break; 1460 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1461 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1462 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1463 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1464 break; 1465 #endif 1466 default: 1467 return; 1468 } 1469 } 1470 1471 static void hci_init_done(void){ 1472 // done. tell the app 1473 log_info("hci_init_done -> HCI_STATE_WORKING"); 1474 hci_stack->state = HCI_STATE_WORKING; 1475 hci_emit_state(); 1476 hci_run(); 1477 } 1478 1479 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1480 1481 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1482 1483 uint8_t command_completed = 0; 1484 1485 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1486 uint16_t opcode = little_endian_read_16(packet,3); 1487 if (opcode == hci_stack->last_cmd_opcode){ 1488 command_completed = 1; 1489 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1490 } else { 1491 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1492 } 1493 } 1494 1495 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1496 uint8_t status = packet[2]; 1497 uint16_t opcode = little_endian_read_16(packet,4); 1498 if (opcode == hci_stack->last_cmd_opcode){ 1499 if (status){ 1500 command_completed = 1; 1501 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1502 } else { 1503 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1504 } 1505 } else { 1506 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1507 } 1508 } 1509 1510 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1511 1512 // Vendor == CSR 1513 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1514 // TODO: track actual command 1515 command_completed = 1; 1516 } 1517 1518 // Vendor == Toshiba 1519 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1520 // TODO: track actual command 1521 command_completed = 1; 1522 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1523 hci_stack->num_cmd_packets = 1; 1524 } 1525 1526 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1527 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1528 // 1529 // HCI Reset 1530 // Timeout 100 ms 1531 // HCI Reset 1532 // Command Complete Reset 1533 // HCI Read Local Version Information 1534 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1535 // hang... 1536 // 1537 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1538 if (!command_completed 1539 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1540 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1541 1542 uint16_t opcode = little_endian_read_16(packet,3); 1543 if (opcode == hci_reset.opcode){ 1544 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1545 return; 1546 } 1547 } 1548 1549 // CSR & H5 1550 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1551 if (!command_completed 1552 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1553 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1554 1555 uint16_t opcode = little_endian_read_16(packet,3); 1556 if (opcode == hci_reset.opcode){ 1557 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1558 return; 1559 } 1560 } 1561 1562 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1563 // fix: Correct substate and behave as command below 1564 if (command_completed){ 1565 switch (hci_stack->substate){ 1566 case HCI_INIT_SEND_RESET: 1567 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1568 break; 1569 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1570 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1571 break; 1572 default: 1573 break; 1574 } 1575 } 1576 1577 #endif 1578 1579 if (!command_completed) return; 1580 1581 int need_baud_change = 0; 1582 int need_addr_change = 0; 1583 1584 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1585 need_baud_change = hci_stack->config 1586 && hci_stack->chipset 1587 && hci_stack->chipset->set_baudrate_command 1588 && hci_stack->hci_transport->set_baudrate 1589 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1590 1591 need_addr_change = hci_stack->custom_bd_addr_set 1592 && hci_stack->chipset 1593 && hci_stack->chipset->set_bd_addr_command; 1594 #endif 1595 1596 switch(hci_stack->substate){ 1597 1598 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1599 case HCI_INIT_SEND_RESET: 1600 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1601 // fix: just correct substate and behave as command below 1602 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1603 btstack_run_loop_remove_timer(&hci_stack->timeout); 1604 break; 1605 case HCI_INIT_W4_SEND_RESET: 1606 btstack_run_loop_remove_timer(&hci_stack->timeout); 1607 break; 1608 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1609 log_info("Received local name, need baud change %d", need_baud_change); 1610 if (need_baud_change){ 1611 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1612 return; 1613 } 1614 // skip baud change 1615 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1616 return; 1617 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1618 // for STLC2500D, baud rate change already happened. 1619 // for others, baud rate gets changed now 1620 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1621 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1622 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1623 hci_stack->hci_transport->set_baudrate(baud_rate); 1624 } 1625 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1626 return; 1627 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1628 btstack_run_loop_remove_timer(&hci_stack->timeout); 1629 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1630 return; 1631 case HCI_INIT_W4_CUSTOM_INIT: 1632 // repeat custom init 1633 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1634 return; 1635 #else 1636 case HCI_INIT_W4_SEND_RESET: 1637 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1638 return ; 1639 #endif 1640 1641 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1642 if (need_baud_change && 1643 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1644 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1645 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1646 return; 1647 } 1648 if (need_addr_change){ 1649 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1650 return; 1651 } 1652 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1653 return; 1654 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1655 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1656 if (need_baud_change){ 1657 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1658 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1659 hci_stack->hci_transport->set_baudrate(baud_rate); 1660 } 1661 if (need_addr_change){ 1662 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1663 return; 1664 } 1665 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1666 return; 1667 case HCI_INIT_W4_SET_BD_ADDR: 1668 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1669 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1670 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1671 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1672 return; 1673 } 1674 // skipping st warm boot 1675 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1676 return; 1677 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1678 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1679 return; 1680 #endif 1681 case HCI_INIT_W4_READ_BD_ADDR: 1682 // only read buffer size if supported 1683 if (hci_stack->local_supported_commands[0] & 0x01) { 1684 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1685 return; 1686 } 1687 // skipping read buffer size 1688 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1689 return; 1690 case HCI_INIT_W4_SET_EVENT_MASK: 1691 // skip Classic init commands for LE only chipsets 1692 if (!hci_classic_supported()){ 1693 #ifdef ENABLE_BLE 1694 if (hci_le_supported()){ 1695 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1696 return; 1697 } 1698 #endif 1699 log_error("Neither BR/EDR nor LE supported"); 1700 hci_init_done(); 1701 return; 1702 } 1703 if (!gap_ssp_supported()){ 1704 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1705 return; 1706 } 1707 break; 1708 #ifdef ENABLE_BLE 1709 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1710 // skip write le host if not supported (e.g. on LE only EM9301) 1711 if (hci_stack->local_supported_commands[0] & 0x02) break; 1712 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1713 return; 1714 1715 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1716 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1717 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1718 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1719 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1720 return; 1721 } 1722 // explicit fall through to reduce repetitions 1723 1724 #ifdef ENABLE_LE_CENTRAL 1725 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1726 #else 1727 hci_init_done(); 1728 #endif 1729 return; 1730 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1731 1732 #endif /* ENABLE_BLE */ 1733 1734 #ifdef ENABLE_SCO_OVER_HCI 1735 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1736 // skip write synchronous flow control if not supported 1737 if (hci_stack->local_supported_commands[0] & 0x04) break; 1738 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1739 // explicit fall through to reduce repetitions 1740 1741 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1742 // skip write default erroneous data reporting if not supported 1743 if (hci_stack->local_supported_commands[0] & 0x08) break; 1744 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1745 // explicit fall through to reduce repetitions 1746 1747 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1748 // skip bcm set sco pcm config on non-Broadcom chipsets 1749 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1750 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1751 // explicit fall through to reduce repetitions 1752 1753 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1754 if (!hci_le_supported()){ 1755 // SKIP LE init for Classic only configuration 1756 hci_init_done(); 1757 return; 1758 } 1759 break; 1760 1761 #else /* !ENABLE_SCO_OVER_HCI */ 1762 1763 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1764 #ifdef ENABLE_BLE 1765 if (hci_le_supported()){ 1766 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1767 return; 1768 } 1769 #endif 1770 // SKIP LE init for Classic only configuration 1771 hci_init_done(); 1772 return; 1773 #endif /* ENABLE_SCO_OVER_HCI */ 1774 1775 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1776 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1777 // Response to command before init done state -> init done 1778 case (HCI_INIT_DONE-1): 1779 hci_init_done(); 1780 return; 1781 #endif 1782 1783 default: 1784 break; 1785 } 1786 hci_initializing_next_state(); 1787 } 1788 1789 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1790 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1791 bd_addr_t bd_address; 1792 memcpy(&bd_address, conn->address, 6); 1793 1794 #ifdef ENABLE_CLASSIC 1795 // cache needed data 1796 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1797 #endif 1798 1799 // connection failed, remove entry 1800 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1801 btstack_memory_hci_connection_free( conn ); 1802 1803 #ifdef ENABLE_CLASSIC 1804 // notify client if dedicated bonding 1805 if (notify_dedicated_bonding_failed){ 1806 log_info("hci notify_dedicated_bonding_failed"); 1807 hci_emit_dedicated_bonding_result(bd_address, status); 1808 } 1809 1810 // if authentication error, also delete link key 1811 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1812 gap_drop_link_key_for_bd_addr(bd_address); 1813 } 1814 #endif 1815 } 1816 1817 static void event_handler(uint8_t *packet, int size){ 1818 1819 uint16_t event_length = packet[1]; 1820 1821 // assert packet is complete 1822 if (size != event_length + 2){ 1823 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1824 return; 1825 } 1826 1827 bd_addr_t addr; 1828 bd_addr_type_t addr_type; 1829 hci_con_handle_t handle; 1830 hci_connection_t * conn; 1831 int i; 1832 int create_connection_cmd; 1833 1834 #ifdef ENABLE_CLASSIC 1835 uint8_t link_type; 1836 #endif 1837 1838 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1839 1840 switch (hci_event_packet_get_type(packet)) { 1841 1842 case HCI_EVENT_COMMAND_COMPLETE: 1843 // get num cmd packets - limit to 1 to reduce complexity 1844 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1845 1846 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1847 if (packet[5]) break; 1848 // terminate, name 248 chars 1849 packet[6+248] = 0; 1850 log_info("local name: %s", &packet[6]); 1851 } 1852 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1853 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1854 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1855 uint16_t acl_len = little_endian_read_16(packet, 6); 1856 uint16_t sco_len = packet[8]; 1857 1858 // determine usable ACL/SCO payload size 1859 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1860 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1861 1862 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1863 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1864 1865 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1866 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1867 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1868 } 1869 } 1870 #ifdef ENABLE_BLE 1871 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1872 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1873 hci_stack->le_acl_packets_total_num = packet[8]; 1874 // determine usable ACL payload size 1875 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1876 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1877 } 1878 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1879 } 1880 #endif 1881 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1882 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1883 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1884 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1885 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); 1886 } 1887 #endif 1888 #ifdef ENABLE_LE_CENTRAL 1889 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1890 hci_stack->le_whitelist_capacity = packet[6]; 1891 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1892 } 1893 #endif 1894 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1895 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1896 hci_stack->local_bd_addr); 1897 log_info("Local Address, Status: 0x%02x: Addr: %s", 1898 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1899 #ifdef ENABLE_CLASSIC 1900 if (hci_stack->link_key_db){ 1901 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1902 } 1903 #endif 1904 } 1905 #ifdef ENABLE_CLASSIC 1906 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1907 hci_emit_discoverable_enabled(hci_stack->discoverable); 1908 } 1909 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1910 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1911 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1912 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1913 hci_emit_event(event, sizeof(event), 1); 1914 } 1915 } 1916 #endif 1917 1918 // Note: HCI init checks 1919 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1920 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1921 1922 #ifdef ENABLE_CLASSIC 1923 // determine usable ACL packet types based on host buffer size and supported features 1924 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1925 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1926 #endif 1927 // Classic/LE 1928 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1929 } 1930 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1931 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1932 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1933 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1934 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1935 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1936 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1937 } 1938 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1939 hci_stack->local_supported_commands[0] = 1940 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1941 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1942 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1943 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 1944 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 1945 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2; // bit 5 = Octet 35, bit 3 1946 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1947 } 1948 #ifdef ENABLE_CLASSIC 1949 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1950 if (packet[5] == 0){ 1951 hci_stack->synchronous_flow_control_enabled = 1; 1952 } 1953 } 1954 #endif 1955 break; 1956 1957 case HCI_EVENT_COMMAND_STATUS: 1958 // get num cmd packets - limit to 1 to reduce complexity 1959 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1960 1961 // check command status to detected failed outgoing connections 1962 create_connection_cmd = 0; 1963 #ifdef ENABLE_CLASSIC 1964 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 1965 create_connection_cmd = 1; 1966 } 1967 #endif 1968 #ifdef ENABLE_LE_CENTRAL 1969 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 1970 create_connection_cmd = 1; 1971 } 1972 #endif 1973 if (create_connection_cmd) { 1974 uint8_t status = hci_event_command_status_get_status(packet); 1975 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 1976 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); 1977 1978 // reset outgoing address info 1979 memset(hci_stack->outgoing_addr, 0, 6); 1980 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 1981 1982 // error => outgoing connection failed 1983 if ((conn != NULL) && (status != 0)){ 1984 hci_handle_connection_failed(conn, status); 1985 } 1986 } 1987 break; 1988 1989 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1990 int offset = 3; 1991 for (i=0; i<packet[2];i++){ 1992 handle = little_endian_read_16(packet, offset) & 0x0fff; 1993 offset += 2; 1994 uint16_t num_packets = little_endian_read_16(packet, offset); 1995 offset += 2; 1996 1997 conn = hci_connection_for_handle(handle); 1998 if (!conn){ 1999 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2000 continue; 2001 } 2002 2003 if (conn->address_type == BD_ADDR_TYPE_SCO){ 2004 #ifdef ENABLE_CLASSIC 2005 if (conn->num_sco_packets_sent >= num_packets){ 2006 conn->num_sco_packets_sent -= num_packets; 2007 } else { 2008 log_error("hci_number_completed_packets, more sco slots freed then sent."); 2009 conn->num_sco_packets_sent = 0; 2010 } 2011 hci_notify_if_sco_can_send_now(); 2012 #endif 2013 } else { 2014 if (conn->num_acl_packets_sent >= num_packets){ 2015 conn->num_acl_packets_sent -= num_packets; 2016 } else { 2017 log_error("hci_number_completed_packets, more acl slots freed then sent."); 2018 conn->num_acl_packets_sent = 0; 2019 } 2020 } 2021 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 2022 } 2023 break; 2024 } 2025 2026 #ifdef ENABLE_CLASSIC 2027 case HCI_EVENT_INQUIRY_COMPLETE: 2028 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2029 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2030 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2031 hci_emit_event(event, sizeof(event), 1); 2032 } 2033 break; 2034 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2035 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2036 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2037 } 2038 break; 2039 case HCI_EVENT_CONNECTION_REQUEST: 2040 reverse_bd_addr(&packet[2], addr); 2041 // TODO: eval COD 8-10 2042 link_type = packet[11]; 2043 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2044 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 2045 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2046 if (!conn) { 2047 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2048 } 2049 if (!conn) { 2050 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2051 hci_stack->decline_reason = 0x0d; 2052 bd_addr_copy(hci_stack->decline_addr, addr); 2053 break; 2054 } 2055 conn->role = HCI_ROLE_SLAVE; 2056 conn->state = RECEIVED_CONNECTION_REQUEST; 2057 // store info about eSCO 2058 if (link_type == 0x02){ 2059 conn->remote_supported_feature_eSCO = 1; 2060 } 2061 hci_run(); 2062 break; 2063 2064 case HCI_EVENT_CONNECTION_COMPLETE: 2065 // Connection management 2066 reverse_bd_addr(&packet[5], addr); 2067 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2068 addr_type = BD_ADDR_TYPE_CLASSIC; 2069 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2070 if (conn) { 2071 if (!packet[2]){ 2072 conn->state = OPEN; 2073 conn->con_handle = little_endian_read_16(packet, 3); 2074 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2075 2076 // restart timer 2077 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2078 btstack_run_loop_add_timer(&conn->timeout); 2079 2080 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2081 2082 hci_emit_nr_connections_changed(); 2083 } else { 2084 // connection failed 2085 hci_handle_connection_failed(conn, packet[2]); 2086 } 2087 } 2088 break; 2089 2090 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2091 reverse_bd_addr(&packet[5], addr); 2092 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2093 if (packet[2]){ 2094 // connection failed 2095 break; 2096 } 2097 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2098 if (!conn) { 2099 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2100 } 2101 if (!conn) { 2102 break; 2103 } 2104 conn->state = OPEN; 2105 conn->con_handle = little_endian_read_16(packet, 3); 2106 2107 #ifdef ENABLE_SCO_OVER_HCI 2108 // update SCO 2109 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2110 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2111 } 2112 #endif 2113 break; 2114 2115 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2116 handle = little_endian_read_16(packet, 3); 2117 conn = hci_connection_for_handle(handle); 2118 if (!conn) break; 2119 if (!packet[2]){ 2120 uint8_t * features = &packet[5]; 2121 if (features[6] & (1 << 3)){ 2122 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2123 } 2124 if (features[3] & (1<<7)){ 2125 conn->remote_supported_feature_eSCO = 1; 2126 } 2127 } 2128 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2129 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2130 if (conn->bonding_flags & BONDING_DEDICATED){ 2131 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2132 } 2133 break; 2134 2135 case HCI_EVENT_LINK_KEY_REQUEST: 2136 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2137 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2138 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2139 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2140 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2141 hci_run(); 2142 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2143 return; 2144 2145 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2146 reverse_bd_addr(&packet[2], addr); 2147 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2148 if (!conn) break; 2149 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2150 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2151 // Change Connection Encryption keeps link key type 2152 if (link_key_type != CHANGED_COMBINATION_KEY){ 2153 conn->link_key_type = link_key_type; 2154 } 2155 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2156 // still forward event to allow dismiss of pairing dialog 2157 break; 2158 } 2159 2160 case HCI_EVENT_PIN_CODE_REQUEST: 2161 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2162 // non-bondable mode: pin code negative reply will be sent 2163 if (!hci_stack->bondable){ 2164 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2165 hci_run(); 2166 return; 2167 } 2168 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2169 if (!hci_stack->link_key_db) break; 2170 hci_event_pin_code_request_get_bd_addr(packet, addr); 2171 hci_stack->link_key_db->delete_link_key(addr); 2172 break; 2173 2174 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2175 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2176 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2177 break; 2178 2179 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2180 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2181 if (!hci_stack->ssp_auto_accept) break; 2182 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2183 break; 2184 2185 case HCI_EVENT_USER_PASSKEY_REQUEST: 2186 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2187 if (!hci_stack->ssp_auto_accept) break; 2188 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2189 break; 2190 case HCI_EVENT_MODE_CHANGE: 2191 handle = hci_event_mode_change_get_handle(packet); 2192 conn = hci_connection_for_handle(handle); 2193 if (!conn) break; 2194 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2195 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2196 break; 2197 #endif 2198 2199 case HCI_EVENT_ENCRYPTION_CHANGE: 2200 handle = little_endian_read_16(packet, 3); 2201 conn = hci_connection_for_handle(handle); 2202 if (!conn) break; 2203 if (packet[2] == 0) { 2204 if (packet[5]){ 2205 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2206 } else { 2207 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2208 } 2209 } 2210 #ifdef ENABLE_CLASSIC 2211 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2212 #endif 2213 break; 2214 2215 #ifdef ENABLE_CLASSIC 2216 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2217 handle = little_endian_read_16(packet, 3); 2218 conn = hci_connection_for_handle(handle); 2219 if (!conn) break; 2220 2221 // dedicated bonding: send result and disconnect 2222 if (conn->bonding_flags & BONDING_DEDICATED){ 2223 conn->bonding_flags &= ~BONDING_DEDICATED; 2224 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2225 conn->bonding_status = packet[2]; 2226 break; 2227 } 2228 2229 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2230 // link key sufficient for requested security 2231 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2232 break; 2233 } 2234 // not enough 2235 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2236 break; 2237 #endif 2238 2239 // HCI_EVENT_DISCONNECTION_COMPLETE 2240 // has been split, to first notify stack before shutting connection down 2241 // see end of function, too. 2242 case HCI_EVENT_DISCONNECTION_COMPLETE: 2243 if (packet[2]) break; // status != 0 2244 handle = little_endian_read_16(packet, 3); 2245 // drop outgoing ACL fragments if it is for closed connection 2246 if (hci_stack->acl_fragmentation_total_size > 0) { 2247 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2248 log_info("hci: drop fragmented ACL data for closed connection"); 2249 hci_stack->acl_fragmentation_total_size = 0; 2250 hci_stack->acl_fragmentation_pos = 0; 2251 } 2252 } 2253 2254 // re-enable advertisements for le connections if active 2255 conn = hci_connection_for_handle(handle); 2256 if (!conn) break; 2257 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2258 #ifdef ENABLE_BLE 2259 #ifdef ENABLE_LE_PERIPHERAL 2260 if (hci_is_le_connection(conn)){ 2261 hci_reenable_advertisements_if_needed(); 2262 } 2263 #endif 2264 #endif 2265 break; 2266 2267 case HCI_EVENT_HARDWARE_ERROR: 2268 log_error("Hardware Error: 0x%02x", packet[2]); 2269 if (hci_stack->hardware_error_callback){ 2270 (*hci_stack->hardware_error_callback)(packet[2]); 2271 } else { 2272 // if no special requests, just reboot stack 2273 hci_power_control_off(); 2274 hci_power_control_on(); 2275 } 2276 break; 2277 2278 #ifdef ENABLE_CLASSIC 2279 case HCI_EVENT_ROLE_CHANGE: 2280 if (packet[2]) break; // status != 0 2281 reverse_bd_addr(&packet[3], addr); 2282 addr_type = BD_ADDR_TYPE_CLASSIC; 2283 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2284 if (!conn) break; 2285 conn->role = packet[9]; 2286 break; 2287 #endif 2288 2289 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2290 // release packet buffer only for asynchronous transport and if there are not further fragements 2291 if (hci_transport_synchronous()) { 2292 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2293 return; // instead of break: to avoid re-entering hci_run() 2294 } 2295 if (hci_stack->acl_fragmentation_total_size) break; 2296 hci_release_packet_buffer(); 2297 2298 // L2CAP receives this event via the hci_emit_event below 2299 2300 #ifdef ENABLE_CLASSIC 2301 // For SCO, we do the can_send_now_check here 2302 hci_notify_if_sco_can_send_now(); 2303 #endif 2304 break; 2305 2306 #ifdef ENABLE_CLASSIC 2307 case HCI_EVENT_SCO_CAN_SEND_NOW: 2308 // For SCO, we do the can_send_now_check here 2309 hci_notify_if_sco_can_send_now(); 2310 return; 2311 2312 // explode inquriy results for easier consumption 2313 case HCI_EVENT_INQUIRY_RESULT: 2314 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2315 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2316 gap_inquiry_explode(packet); 2317 break; 2318 #endif 2319 2320 #ifdef ENABLE_BLE 2321 case HCI_EVENT_LE_META: 2322 switch (packet[2]){ 2323 #ifdef ENABLE_LE_CENTRAL 2324 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2325 // log_info("advertising report received"); 2326 if (!hci_stack->le_scanning_enabled) break; 2327 le_handle_advertisement_report(packet, size); 2328 break; 2329 #endif 2330 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2331 // Connection management 2332 reverse_bd_addr(&packet[8], addr); 2333 addr_type = (bd_addr_type_t)packet[7]; 2334 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2335 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2336 2337 #ifdef ENABLE_LE_CENTRAL 2338 // if auto-connect, remove from whitelist in both roles 2339 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2340 hci_remove_from_whitelist(addr_type, addr); 2341 } 2342 // handle error: error is reported only to the initiator -> outgoing connection 2343 if (packet[3]){ 2344 2345 // handle cancelled outgoing connection 2346 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2347 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2348 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2349 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2350 conn = gap_get_outgoing_connection(); 2351 } 2352 2353 // outgoing connection establishment is done 2354 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2355 // remove entry 2356 if (conn){ 2357 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2358 btstack_memory_hci_connection_free( conn ); 2359 } 2360 break; 2361 } 2362 #endif 2363 // on success, both hosts receive connection complete event 2364 if (packet[6] == HCI_ROLE_MASTER){ 2365 #ifdef ENABLE_LE_CENTRAL 2366 // if we're master, it was an outgoing connection and we're done with it 2367 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2368 #endif 2369 } else { 2370 #ifdef ENABLE_LE_PERIPHERAL 2371 // if we're slave, it was an incoming connection, advertisements have stopped 2372 hci_stack->le_advertisements_active = 0; 2373 #endif 2374 } 2375 // LE connections are auto-accepted, so just create a connection if there isn't one already 2376 if (!conn){ 2377 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2378 } 2379 // no memory, sorry. 2380 if (!conn){ 2381 break; 2382 } 2383 2384 conn->state = OPEN; 2385 conn->role = packet[6]; 2386 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2387 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2388 2389 #ifdef ENABLE_LE_PERIPHERAL 2390 if (packet[6] == HCI_ROLE_SLAVE){ 2391 hci_reenable_advertisements_if_needed(); 2392 } 2393 #endif 2394 2395 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2396 2397 // restart timer 2398 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2399 // btstack_run_loop_add_timer(&conn->timeout); 2400 2401 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2402 2403 hci_emit_nr_connections_changed(); 2404 break; 2405 2406 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2407 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2408 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2409 conn = hci_connection_for_handle(handle); 2410 if (!conn) break; 2411 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2412 break; 2413 2414 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2415 // connection 2416 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2417 conn = hci_connection_for_handle(handle); 2418 if (conn) { 2419 // read arguments 2420 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2421 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2422 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2423 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2424 2425 // validate against current connection parameter range 2426 le_connection_parameter_range_t existing_range; 2427 gap_get_connection_parameter_range(&existing_range); 2428 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2429 if (update_parameter){ 2430 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2431 conn->le_conn_interval_min = le_conn_interval_min; 2432 conn->le_conn_interval_max = le_conn_interval_max; 2433 conn->le_conn_latency = le_conn_latency; 2434 conn->le_supervision_timeout = le_supervision_timeout; 2435 } else { 2436 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2437 } 2438 } 2439 break; 2440 default: 2441 break; 2442 } 2443 break; 2444 #endif 2445 case HCI_EVENT_VENDOR_SPECIFIC: 2446 // Vendor specific commands often create vendor specific event instead of num completed packets 2447 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2448 switch (hci_stack->manufacturer){ 2449 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2450 hci_stack->num_cmd_packets = 1; 2451 break; 2452 default: 2453 break; 2454 } 2455 break; 2456 default: 2457 break; 2458 } 2459 2460 // handle BT initialization 2461 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2462 hci_initializing_event_handler(packet, size); 2463 } 2464 2465 // help with BT sleep 2466 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2467 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2468 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2469 hci_initializing_next_state(); 2470 } 2471 2472 // notify upper stack 2473 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2474 2475 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2476 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2477 if (!packet[2]){ 2478 handle = little_endian_read_16(packet, 3); 2479 hci_connection_t * aConn = hci_connection_for_handle(handle); 2480 if (aConn) { 2481 uint8_t status = aConn->bonding_status; 2482 uint16_t flags = aConn->bonding_flags; 2483 bd_addr_t bd_address; 2484 memcpy(&bd_address, aConn->address, 6); 2485 hci_shutdown_connection(aConn); 2486 // connection struct is gone, don't access anymore 2487 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2488 hci_emit_dedicated_bonding_result(bd_address, status); 2489 } 2490 } 2491 } 2492 } 2493 2494 // execute main loop 2495 hci_run(); 2496 } 2497 2498 #ifdef ENABLE_CLASSIC 2499 static void sco_handler(uint8_t * packet, uint16_t size){ 2500 if (!hci_stack->sco_packet_handler) return; 2501 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2502 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2503 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2504 hci_connection_t *conn = hci_connection_for_handle(con_handle); 2505 if (conn){ 2506 conn->num_packets_completed++; 2507 hci_stack->host_completed_packets = 1; 2508 hci_run(); 2509 } 2510 #endif 2511 } 2512 #endif 2513 2514 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2515 hci_dump_packet(packet_type, 1, packet, size); 2516 switch (packet_type) { 2517 case HCI_EVENT_PACKET: 2518 event_handler(packet, size); 2519 break; 2520 case HCI_ACL_DATA_PACKET: 2521 acl_handler(packet, size); 2522 break; 2523 #ifdef ENABLE_CLASSIC 2524 case HCI_SCO_DATA_PACKET: 2525 sco_handler(packet, size); 2526 break; 2527 #endif 2528 default: 2529 break; 2530 } 2531 } 2532 2533 /** 2534 * @brief Add event packet handler. 2535 */ 2536 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2537 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2538 } 2539 2540 2541 /** Register HCI packet handlers */ 2542 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2543 hci_stack->acl_packet_handler = handler; 2544 } 2545 2546 #ifdef ENABLE_CLASSIC 2547 /** 2548 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2549 */ 2550 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2551 hci_stack->sco_packet_handler = handler; 2552 } 2553 #endif 2554 2555 static void hci_state_reset(void){ 2556 // no connections yet 2557 hci_stack->connections = NULL; 2558 2559 // keep discoverable/connectable as this has been requested by the client(s) 2560 // hci_stack->discoverable = 0; 2561 // hci_stack->connectable = 0; 2562 // hci_stack->bondable = 1; 2563 // hci_stack->own_addr_type = 0; 2564 2565 // buffer is free 2566 hci_stack->hci_packet_buffer_reserved = 0; 2567 2568 // no pending cmds 2569 hci_stack->decline_reason = 0; 2570 hci_stack->new_scan_enable_value = 0xff; 2571 2572 // LE 2573 #ifdef ENABLE_BLE 2574 memset(hci_stack->le_random_address, 0, 6); 2575 hci_stack->le_random_address_set = 0; 2576 #endif 2577 #ifdef ENABLE_LE_CENTRAL 2578 hci_stack->le_scanning_active = 0; 2579 hci_stack->le_scan_type = 0xff; 2580 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2581 hci_stack->le_whitelist = 0; 2582 hci_stack->le_whitelist_capacity = 0; 2583 #endif 2584 } 2585 2586 #ifdef ENABLE_CLASSIC 2587 /** 2588 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2589 */ 2590 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2591 // store and open remote device db 2592 hci_stack->link_key_db = link_key_db; 2593 if (hci_stack->link_key_db) { 2594 hci_stack->link_key_db->open(); 2595 } 2596 } 2597 #endif 2598 2599 void hci_init(const hci_transport_t *transport, const void *config){ 2600 2601 #ifdef HAVE_MALLOC 2602 if (!hci_stack) { 2603 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2604 } 2605 #else 2606 hci_stack = &hci_stack_static; 2607 #endif 2608 memset(hci_stack, 0, sizeof(hci_stack_t)); 2609 2610 // reference to use transport layer implementation 2611 hci_stack->hci_transport = transport; 2612 2613 // reference to used config 2614 hci_stack->config = config; 2615 2616 // setup pointer for outgoing packet buffer 2617 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2618 2619 // max acl payload size defined in config.h 2620 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2621 2622 // register packet handlers with transport 2623 transport->register_packet_handler(&packet_handler); 2624 2625 hci_stack->state = HCI_STATE_OFF; 2626 2627 // class of device 2628 hci_stack->class_of_device = 0x007a020c; // Smartphone 2629 2630 // bondable by default 2631 hci_stack->bondable = 1; 2632 2633 #ifdef ENABLE_CLASSIC 2634 // classic name 2635 hci_stack->local_name = default_classic_name; 2636 2637 // Master slave policy 2638 hci_stack->master_slave_policy = 1; 2639 #endif 2640 2641 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2642 hci_stack->ssp_enable = 1; 2643 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2644 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2645 hci_stack->ssp_auto_accept = 1; 2646 2647 // voice setting - signed 16 bit pcm data with CVSD over the air 2648 hci_stack->sco_voice_setting = 0x60; 2649 2650 #ifdef ENABLE_LE_CENTRAL 2651 // connection parameter to use for outgoing connections 2652 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2653 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2654 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2655 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2656 hci_stack->le_connection_latency = 4; // 4 2657 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2658 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2659 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2660 #endif 2661 2662 #ifdef ENABLE_LE_PERIPHERAL 2663 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2664 #endif 2665 2666 // connection parameter range used to answer connection parameter update requests in l2cap 2667 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2668 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2669 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2670 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2671 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2672 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2673 2674 hci_state_reset(); 2675 } 2676 2677 /** 2678 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2679 */ 2680 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2681 hci_stack->chipset = chipset_driver; 2682 2683 // reset chipset driver - init is also called on power_up 2684 if (hci_stack->chipset && hci_stack->chipset->init){ 2685 hci_stack->chipset->init(hci_stack->config); 2686 } 2687 } 2688 2689 /** 2690 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2691 */ 2692 void hci_set_control(const btstack_control_t *hardware_control){ 2693 // references to used control implementation 2694 hci_stack->control = hardware_control; 2695 // init with transport config 2696 hardware_control->init(hci_stack->config); 2697 } 2698 2699 void hci_close(void){ 2700 // close remote device db 2701 if (hci_stack->link_key_db) { 2702 hci_stack->link_key_db->close(); 2703 } 2704 2705 btstack_linked_list_iterator_t lit; 2706 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2707 while (btstack_linked_list_iterator_has_next(&lit)){ 2708 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2709 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2710 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2711 hci_shutdown_connection(connection); 2712 } 2713 2714 hci_power_control(HCI_POWER_OFF); 2715 2716 #ifdef HAVE_MALLOC 2717 free(hci_stack); 2718 #endif 2719 hci_stack = NULL; 2720 } 2721 2722 #ifdef ENABLE_CLASSIC 2723 void gap_set_class_of_device(uint32_t class_of_device){ 2724 hci_stack->class_of_device = class_of_device; 2725 } 2726 2727 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 2728 hci_stack->default_link_policy_settings = default_link_policy_settings; 2729 } 2730 2731 void hci_disable_l2cap_timeout_check(void){ 2732 disable_l2cap_timeouts = 1; 2733 } 2734 #endif 2735 2736 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2737 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2738 void hci_set_bd_addr(bd_addr_t addr){ 2739 memcpy(hci_stack->custom_bd_addr, addr, 6); 2740 hci_stack->custom_bd_addr_set = 1; 2741 } 2742 #endif 2743 2744 // State-Module-Driver overview 2745 // state module low-level 2746 // HCI_STATE_OFF off close 2747 // HCI_STATE_INITIALIZING, on open 2748 // HCI_STATE_WORKING, on open 2749 // HCI_STATE_HALTING, on open 2750 // HCI_STATE_SLEEPING, off/sleep close 2751 // HCI_STATE_FALLING_ASLEEP on open 2752 2753 static int hci_power_control_on(void){ 2754 2755 // power on 2756 int err = 0; 2757 if (hci_stack->control && hci_stack->control->on){ 2758 err = (*hci_stack->control->on)(); 2759 } 2760 if (err){ 2761 log_error( "POWER_ON failed"); 2762 hci_emit_hci_open_failed(); 2763 return err; 2764 } 2765 2766 // int chipset driver 2767 if (hci_stack->chipset && hci_stack->chipset->init){ 2768 hci_stack->chipset->init(hci_stack->config); 2769 } 2770 2771 // init transport 2772 if (hci_stack->hci_transport->init){ 2773 hci_stack->hci_transport->init(hci_stack->config); 2774 } 2775 2776 // open transport 2777 err = hci_stack->hci_transport->open(); 2778 if (err){ 2779 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2780 if (hci_stack->control && hci_stack->control->off){ 2781 (*hci_stack->control->off)(); 2782 } 2783 hci_emit_hci_open_failed(); 2784 return err; 2785 } 2786 return 0; 2787 } 2788 2789 static void hci_power_control_off(void){ 2790 2791 log_info("hci_power_control_off"); 2792 2793 // close low-level device 2794 hci_stack->hci_transport->close(); 2795 2796 log_info("hci_power_control_off - hci_transport closed"); 2797 2798 // power off 2799 if (hci_stack->control && hci_stack->control->off){ 2800 (*hci_stack->control->off)(); 2801 } 2802 2803 log_info("hci_power_control_off - control closed"); 2804 2805 hci_stack->state = HCI_STATE_OFF; 2806 } 2807 2808 static void hci_power_control_sleep(void){ 2809 2810 log_info("hci_power_control_sleep"); 2811 2812 #if 0 2813 // don't close serial port during sleep 2814 2815 // close low-level device 2816 hci_stack->hci_transport->close(hci_stack->config); 2817 #endif 2818 2819 // sleep mode 2820 if (hci_stack->control && hci_stack->control->sleep){ 2821 (*hci_stack->control->sleep)(); 2822 } 2823 2824 hci_stack->state = HCI_STATE_SLEEPING; 2825 } 2826 2827 static int hci_power_control_wake(void){ 2828 2829 log_info("hci_power_control_wake"); 2830 2831 // wake on 2832 if (hci_stack->control && hci_stack->control->wake){ 2833 (*hci_stack->control->wake)(); 2834 } 2835 2836 #if 0 2837 // open low-level device 2838 int err = hci_stack->hci_transport->open(hci_stack->config); 2839 if (err){ 2840 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2841 if (hci_stack->control && hci_stack->control->off){ 2842 (*hci_stack->control->off)(); 2843 } 2844 hci_emit_hci_open_failed(); 2845 return err; 2846 } 2847 #endif 2848 2849 return 0; 2850 } 2851 2852 static void hci_power_transition_to_initializing(void){ 2853 // set up state machine 2854 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2855 hci_stack->hci_packet_buffer_reserved = 0; 2856 hci_stack->state = HCI_STATE_INITIALIZING; 2857 hci_stack->substate = HCI_INIT_SEND_RESET; 2858 } 2859 2860 int hci_power_control(HCI_POWER_MODE power_mode){ 2861 2862 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2863 2864 int err = 0; 2865 switch (hci_stack->state){ 2866 2867 case HCI_STATE_OFF: 2868 switch (power_mode){ 2869 case HCI_POWER_ON: 2870 err = hci_power_control_on(); 2871 if (err) { 2872 log_error("hci_power_control_on() error %d", err); 2873 return err; 2874 } 2875 hci_power_transition_to_initializing(); 2876 break; 2877 case HCI_POWER_OFF: 2878 // do nothing 2879 break; 2880 case HCI_POWER_SLEEP: 2881 // do nothing (with SLEEP == OFF) 2882 break; 2883 } 2884 break; 2885 2886 case HCI_STATE_INITIALIZING: 2887 switch (power_mode){ 2888 case HCI_POWER_ON: 2889 // do nothing 2890 break; 2891 case HCI_POWER_OFF: 2892 // no connections yet, just turn it off 2893 hci_power_control_off(); 2894 break; 2895 case HCI_POWER_SLEEP: 2896 // no connections yet, just turn it off 2897 hci_power_control_sleep(); 2898 break; 2899 } 2900 break; 2901 2902 case HCI_STATE_WORKING: 2903 switch (power_mode){ 2904 case HCI_POWER_ON: 2905 // do nothing 2906 break; 2907 case HCI_POWER_OFF: 2908 // see hci_run 2909 hci_stack->state = HCI_STATE_HALTING; 2910 break; 2911 case HCI_POWER_SLEEP: 2912 // see hci_run 2913 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2914 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2915 break; 2916 } 2917 break; 2918 2919 case HCI_STATE_HALTING: 2920 switch (power_mode){ 2921 case HCI_POWER_ON: 2922 hci_power_transition_to_initializing(); 2923 break; 2924 case HCI_POWER_OFF: 2925 // do nothing 2926 break; 2927 case HCI_POWER_SLEEP: 2928 // see hci_run 2929 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2930 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2931 break; 2932 } 2933 break; 2934 2935 case HCI_STATE_FALLING_ASLEEP: 2936 switch (power_mode){ 2937 case HCI_POWER_ON: 2938 2939 #ifdef HAVE_PLATFORM_IPHONE_OS 2940 // nothing to do, if H4 supports power management 2941 if (btstack_control_iphone_power_management_enabled()){ 2942 hci_stack->state = HCI_STATE_INITIALIZING; 2943 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2944 break; 2945 } 2946 #endif 2947 hci_power_transition_to_initializing(); 2948 break; 2949 case HCI_POWER_OFF: 2950 // see hci_run 2951 hci_stack->state = HCI_STATE_HALTING; 2952 break; 2953 case HCI_POWER_SLEEP: 2954 // do nothing 2955 break; 2956 } 2957 break; 2958 2959 case HCI_STATE_SLEEPING: 2960 switch (power_mode){ 2961 case HCI_POWER_ON: 2962 2963 #ifdef HAVE_PLATFORM_IPHONE_OS 2964 // nothing to do, if H4 supports power management 2965 if (btstack_control_iphone_power_management_enabled()){ 2966 hci_stack->state = HCI_STATE_INITIALIZING; 2967 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2968 hci_update_scan_enable(); 2969 break; 2970 } 2971 #endif 2972 err = hci_power_control_wake(); 2973 if (err) return err; 2974 hci_power_transition_to_initializing(); 2975 break; 2976 case HCI_POWER_OFF: 2977 hci_stack->state = HCI_STATE_HALTING; 2978 break; 2979 case HCI_POWER_SLEEP: 2980 // do nothing 2981 break; 2982 } 2983 break; 2984 } 2985 2986 // create internal event 2987 hci_emit_state(); 2988 2989 // trigger next/first action 2990 hci_run(); 2991 2992 return 0; 2993 } 2994 2995 2996 #ifdef ENABLE_CLASSIC 2997 2998 static void hci_update_scan_enable(void){ 2999 // 2 = page scan, 1 = inq scan 3000 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 3001 hci_run(); 3002 } 3003 3004 void gap_discoverable_control(uint8_t enable){ 3005 if (enable) enable = 1; // normalize argument 3006 3007 if (hci_stack->discoverable == enable){ 3008 hci_emit_discoverable_enabled(hci_stack->discoverable); 3009 return; 3010 } 3011 3012 hci_stack->discoverable = enable; 3013 hci_update_scan_enable(); 3014 } 3015 3016 void gap_connectable_control(uint8_t enable){ 3017 if (enable) enable = 1; // normalize argument 3018 3019 // don't emit event 3020 if (hci_stack->connectable == enable) return; 3021 3022 hci_stack->connectable = enable; 3023 hci_update_scan_enable(); 3024 } 3025 #endif 3026 3027 void gap_local_bd_addr(bd_addr_t address_buffer){ 3028 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3029 } 3030 3031 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3032 static void hci_host_num_completed_packets(void){ 3033 3034 // create packet manually as arrays are not supported and num_commands should not get reduced 3035 hci_reserve_packet_buffer(); 3036 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3037 3038 uint16_t size = 0; 3039 uint16_t num_handles = 0; 3040 packet[size++] = 0x35; 3041 packet[size++] = 0x0c; 3042 size++; // skip param len 3043 size++; // skip num handles 3044 3045 // add { handle, packets } entries 3046 btstack_linked_item_t * it; 3047 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3048 hci_connection_t * connection = (hci_connection_t *) it; 3049 if (connection->num_packets_completed){ 3050 little_endian_store_16(packet, size, connection->con_handle); 3051 size += 2; 3052 little_endian_store_16(packet, size, connection->num_packets_completed); 3053 size += 2; 3054 // 3055 num_handles++; 3056 connection->num_packets_completed = 0; 3057 } 3058 } 3059 3060 packet[2] = size - 3; 3061 packet[3] = num_handles; 3062 3063 hci_stack->host_completed_packets = 0; 3064 3065 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3066 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3067 3068 // release packet buffer for synchronous transport implementations 3069 if (hci_transport_synchronous()){ 3070 hci_release_packet_buffer(); 3071 hci_emit_transport_packet_sent(); 3072 } 3073 } 3074 #endif 3075 3076 static void hci_run(void){ 3077 3078 // log_info("hci_run: entered"); 3079 btstack_linked_item_t * it; 3080 3081 // send continuation fragments first, as they block the prepared packet buffer 3082 if (hci_stack->acl_fragmentation_total_size > 0) { 3083 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3084 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3085 if (connection) { 3086 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3087 hci_send_acl_packet_fragments(connection); 3088 return; 3089 } 3090 } else { 3091 // connection gone -> discard further fragments 3092 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3093 hci_stack->acl_fragmentation_total_size = 0; 3094 hci_stack->acl_fragmentation_pos = 0; 3095 } 3096 } 3097 3098 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3099 // send host num completed packets next as they don't require num_cmd_packets > 0 3100 if (!hci_can_send_comand_packet_transport()) return; 3101 if (hci_stack->host_completed_packets){ 3102 hci_host_num_completed_packets(); 3103 return; 3104 } 3105 #endif 3106 3107 if (!hci_can_send_command_packet_now()) return; 3108 3109 // global/non-connection oriented commands 3110 3111 #ifdef ENABLE_CLASSIC 3112 // decline incoming connections 3113 if (hci_stack->decline_reason){ 3114 uint8_t reason = hci_stack->decline_reason; 3115 hci_stack->decline_reason = 0; 3116 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3117 return; 3118 } 3119 // send scan enable 3120 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 3121 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3122 hci_stack->new_scan_enable_value = 0xff; 3123 return; 3124 } 3125 // start/stop inquiry 3126 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 3127 uint8_t duration = hci_stack->inquiry_state; 3128 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3129 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3130 return; 3131 } 3132 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3133 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3134 hci_send_cmd(&hci_inquiry_cancel); 3135 return; 3136 } 3137 // remote name request 3138 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3139 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3140 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3141 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3142 return; 3143 } 3144 // pairing 3145 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3146 uint8_t state = hci_stack->gap_pairing_state; 3147 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3148 switch (state){ 3149 case GAP_PAIRING_STATE_SEND_PIN: 3150 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); 3151 break; 3152 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3153 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3154 break; 3155 case GAP_PAIRING_STATE_SEND_PASSKEY: 3156 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3157 break; 3158 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3159 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3160 break; 3161 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3162 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3163 break; 3164 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3165 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3166 break; 3167 default: 3168 break; 3169 } 3170 return; 3171 } 3172 #endif 3173 3174 #ifdef ENABLE_BLE 3175 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 3176 if ((hci_stack->state == HCI_STATE_WORKING) 3177 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 3178 3179 #ifdef ENABLE_LE_CENTRAL 3180 // handle le scan 3181 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3182 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3183 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3184 return; 3185 } 3186 if (hci_stack->le_scan_type != 0xff){ 3187 // defaults: active scanning, accept all advertisement packets 3188 int scan_type = hci_stack->le_scan_type; 3189 hci_stack->le_scan_type = 0xff; 3190 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); 3191 return; 3192 } 3193 #endif 3194 #ifdef ENABLE_LE_PERIPHERAL 3195 // le advertisement control 3196 if (hci_stack->le_advertisements_todo){ 3197 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3198 } 3199 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3200 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3201 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3202 return; 3203 } 3204 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3205 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3206 hci_send_cmd(&hci_le_set_advertising_parameters, 3207 hci_stack->le_advertisements_interval_min, 3208 hci_stack->le_advertisements_interval_max, 3209 hci_stack->le_advertisements_type, 3210 hci_stack->le_own_addr_type, 3211 hci_stack->le_advertisements_direct_address_type, 3212 hci_stack->le_advertisements_direct_address, 3213 hci_stack->le_advertisements_channel_map, 3214 hci_stack->le_advertisements_filter_policy); 3215 return; 3216 } 3217 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3218 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3219 uint8_t adv_data_clean[31]; 3220 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3221 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 3222 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3223 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3224 return; 3225 } 3226 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3227 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3228 uint8_t scan_data_clean[31]; 3229 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3230 memcpy(scan_data_clean, hci_stack->le_scan_response_data, hci_stack->le_scan_response_data_len); 3231 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3232 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, hci_stack->le_scan_response_data); 3233 return; 3234 } 3235 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3236 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3237 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3238 return; 3239 } 3240 #endif 3241 3242 #ifdef ENABLE_LE_CENTRAL 3243 // 3244 // LE Whitelist Management 3245 // 3246 3247 // check if whitelist needs modification 3248 btstack_linked_list_iterator_t lit; 3249 int modification_pending = 0; 3250 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3251 while (btstack_linked_list_iterator_has_next(&lit)){ 3252 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3253 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3254 modification_pending = 1; 3255 break; 3256 } 3257 } 3258 3259 if (modification_pending){ 3260 // stop connnecting if modification pending 3261 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3262 hci_send_cmd(&hci_le_create_connection_cancel); 3263 return; 3264 } 3265 3266 // add/remove entries 3267 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3268 while (btstack_linked_list_iterator_has_next(&lit)){ 3269 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3270 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3271 entry->state = LE_WHITELIST_ON_CONTROLLER; 3272 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3273 return; 3274 3275 } 3276 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3277 bd_addr_t address; 3278 bd_addr_type_t address_type = entry->address_type; 3279 memcpy(address, entry->address, 6); 3280 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3281 btstack_memory_whitelist_entry_free(entry); 3282 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3283 return; 3284 } 3285 } 3286 } 3287 3288 // start connecting 3289 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3290 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3291 bd_addr_t null_addr; 3292 memset(null_addr, 0, 6); 3293 hci_send_cmd(&hci_le_create_connection, 3294 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3295 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3296 1, // use whitelist 3297 0, // peer address type 3298 null_addr, // peer bd addr 3299 hci_stack->le_own_addr_type, // our addr type: 3300 hci_stack->le_connection_interval_min, // conn interval min 3301 hci_stack->le_connection_interval_max, // conn interval max 3302 hci_stack->le_connection_latency, // conn latency 3303 hci_stack->le_supervision_timeout, // conn latency 3304 hci_stack->le_minimum_ce_length, // min ce length 3305 hci_stack->le_maximum_ce_length // max ce length 3306 ); 3307 return; 3308 } 3309 #endif 3310 } 3311 #endif 3312 3313 // send pending HCI commands 3314 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3315 hci_connection_t * connection = (hci_connection_t *) it; 3316 3317 switch(connection->state){ 3318 case SEND_CREATE_CONNECTION: 3319 switch(connection->address_type){ 3320 #ifdef ENABLE_CLASSIC 3321 case BD_ADDR_TYPE_CLASSIC: 3322 log_info("sending hci_create_connection"); 3323 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3324 break; 3325 #endif 3326 default: 3327 #ifdef ENABLE_BLE 3328 #ifdef ENABLE_LE_CENTRAL 3329 // track outgoing connection 3330 hci_stack->outgoing_addr_type = connection->address_type; 3331 memcpy(hci_stack->outgoing_addr, connection->address, 6); 3332 log_info("sending hci_le_create_connection"); 3333 hci_send_cmd(&hci_le_create_connection, 3334 hci_stack->le_connection_scan_interval, // conn scan interval 3335 hci_stack->le_connection_scan_window, // conn scan windows 3336 0, // don't use whitelist 3337 connection->address_type, // peer address type 3338 connection->address, // peer bd addr 3339 hci_stack->le_own_addr_type, // our addr type: 3340 hci_stack->le_connection_interval_min, // conn interval min 3341 hci_stack->le_connection_interval_max, // conn interval max 3342 hci_stack->le_connection_latency, // conn latency 3343 hci_stack->le_supervision_timeout, // conn latency 3344 hci_stack->le_minimum_ce_length, // min ce length 3345 hci_stack->le_maximum_ce_length // max ce length 3346 ); 3347 connection->state = SENT_CREATE_CONNECTION; 3348 #endif 3349 #endif 3350 break; 3351 } 3352 return; 3353 3354 #ifdef ENABLE_CLASSIC 3355 case RECEIVED_CONNECTION_REQUEST: 3356 connection->role = HCI_ROLE_SLAVE; 3357 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3358 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3359 connection->state = ACCEPTED_CONNECTION_REQUEST; 3360 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3361 } 3362 return; 3363 #endif 3364 3365 #ifdef ENABLE_BLE 3366 #ifdef ENABLE_LE_CENTRAL 3367 case SEND_CANCEL_CONNECTION: 3368 connection->state = SENT_CANCEL_CONNECTION; 3369 hci_send_cmd(&hci_le_create_connection_cancel); 3370 return; 3371 #endif 3372 #endif 3373 case SEND_DISCONNECT: 3374 connection->state = SENT_DISCONNECT; 3375 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3376 return; 3377 3378 default: 3379 break; 3380 } 3381 3382 // no further commands if connection is about to get shut down 3383 if (connection->state == SENT_DISCONNECT) continue; 3384 3385 #ifdef ENABLE_CLASSIC 3386 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3387 log_info("responding to link key request"); 3388 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3389 link_key_t link_key; 3390 link_key_type_t link_key_type; 3391 if ( hci_stack->link_key_db 3392 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3393 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3394 connection->link_key_type = link_key_type; 3395 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3396 } else { 3397 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3398 } 3399 return; 3400 } 3401 3402 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3403 log_info("denying to pin request"); 3404 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3405 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3406 return; 3407 } 3408 3409 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3410 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3411 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3412 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3413 // tweak authentication requirements 3414 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3415 if (connection->bonding_flags & BONDING_DEDICATED){ 3416 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3417 } 3418 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3419 authreq |= 1; 3420 } 3421 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3422 } else { 3423 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3424 } 3425 return; 3426 } 3427 3428 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3429 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3430 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3431 return; 3432 } 3433 3434 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3435 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3436 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3437 return; 3438 } 3439 3440 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3441 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3442 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3443 return; 3444 } 3445 3446 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3447 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3448 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3449 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3450 return; 3451 } 3452 3453 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3454 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3455 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3456 return; 3457 } 3458 3459 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3460 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3461 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3462 return; 3463 } 3464 #endif 3465 3466 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3467 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3468 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3469 return; 3470 } 3471 3472 #ifdef ENABLE_CLASSIC 3473 uint16_t sniff_min_interval; 3474 switch (connection->sniff_min_interval){ 3475 case 0: 3476 break; 3477 case 0xffff: 3478 connection->sniff_min_interval = 0; 3479 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3480 return; 3481 default: 3482 sniff_min_interval = connection->sniff_min_interval; 3483 connection->sniff_min_interval = 0; 3484 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3485 break; 3486 } 3487 #endif 3488 3489 #ifdef ENABLE_BLE 3490 switch (connection->le_con_parameter_update_state){ 3491 // response to L2CAP CON PARAMETER UPDATE REQUEST 3492 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3493 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3494 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3495 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3496 0x0000, 0xffff); 3497 break; 3498 case CON_PARAMETER_UPDATE_REPLY: 3499 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3500 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3501 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3502 0x0000, 0xffff); 3503 break; 3504 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3505 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3506 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3507 break; 3508 default: 3509 break; 3510 } 3511 #endif 3512 } 3513 3514 hci_connection_t * connection; 3515 switch (hci_stack->state){ 3516 case HCI_STATE_INITIALIZING: 3517 hci_initializing_run(); 3518 break; 3519 3520 case HCI_STATE_HALTING: 3521 3522 log_info("HCI_STATE_HALTING"); 3523 3524 // free whitelist entries 3525 #ifdef ENABLE_BLE 3526 #ifdef ENABLE_LE_CENTRAL 3527 { 3528 btstack_linked_list_iterator_t lit; 3529 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3530 while (btstack_linked_list_iterator_has_next(&lit)){ 3531 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3532 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3533 btstack_memory_whitelist_entry_free(entry); 3534 } 3535 } 3536 #endif 3537 #endif 3538 // close all open connections 3539 connection = (hci_connection_t *) hci_stack->connections; 3540 if (connection){ 3541 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3542 if (!hci_can_send_command_packet_now()) return; 3543 3544 // check state 3545 if (connection->state == SENT_DISCONNECT) return; 3546 connection->state = SENT_DISCONNECT; 3547 3548 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3549 3550 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3551 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3552 3553 // ... which would be ignored anyway as we shutdown (free) the connection now 3554 hci_shutdown_connection(connection); 3555 3556 // finally, send the disconnect command 3557 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3558 return; 3559 } 3560 log_info("HCI_STATE_HALTING, calling off"); 3561 3562 // switch mode 3563 hci_power_control_off(); 3564 3565 log_info("HCI_STATE_HALTING, emitting state"); 3566 hci_emit_state(); 3567 log_info("HCI_STATE_HALTING, done"); 3568 break; 3569 3570 case HCI_STATE_FALLING_ASLEEP: 3571 switch(hci_stack->substate) { 3572 case HCI_FALLING_ASLEEP_DISCONNECT: 3573 log_info("HCI_STATE_FALLING_ASLEEP"); 3574 // close all open connections 3575 connection = (hci_connection_t *) hci_stack->connections; 3576 3577 #ifdef HAVE_PLATFORM_IPHONE_OS 3578 // don't close connections, if H4 supports power management 3579 if (btstack_control_iphone_power_management_enabled()){ 3580 connection = NULL; 3581 } 3582 #endif 3583 if (connection){ 3584 3585 // send disconnect 3586 if (!hci_can_send_command_packet_now()) return; 3587 3588 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3589 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3590 3591 // send disconnected event right away - causes higher layer connections to get closed, too. 3592 hci_shutdown_connection(connection); 3593 return; 3594 } 3595 3596 if (hci_classic_supported()){ 3597 // disable page and inquiry scan 3598 if (!hci_can_send_command_packet_now()) return; 3599 3600 log_info("HCI_STATE_HALTING, disabling inq scans"); 3601 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3602 3603 // continue in next sub state 3604 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3605 break; 3606 } 3607 // no break - fall through for ble-only chips 3608 3609 case HCI_FALLING_ASLEEP_COMPLETE: 3610 log_info("HCI_STATE_HALTING, calling sleep"); 3611 #ifdef HAVE_PLATFORM_IPHONE_OS 3612 // don't actually go to sleep, if H4 supports power management 3613 if (btstack_control_iphone_power_management_enabled()){ 3614 // SLEEP MODE reached 3615 hci_stack->state = HCI_STATE_SLEEPING; 3616 hci_emit_state(); 3617 break; 3618 } 3619 #endif 3620 // switch mode 3621 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3622 hci_emit_state(); 3623 break; 3624 3625 default: 3626 break; 3627 } 3628 break; 3629 3630 default: 3631 break; 3632 } 3633 } 3634 3635 int hci_send_cmd_packet(uint8_t *packet, int size){ 3636 // house-keeping 3637 3638 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3639 hci_stack->loopback_mode = packet[3]; 3640 } 3641 3642 #ifdef ENABLE_CLASSIC 3643 bd_addr_t addr; 3644 hci_connection_t * conn; 3645 3646 // create_connection? 3647 if (IS_COMMAND(packet, hci_create_connection)){ 3648 reverse_bd_addr(&packet[3], addr); 3649 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3650 3651 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3652 if (!conn){ 3653 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3654 if (!conn){ 3655 // notify client that alloc failed 3656 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3657 return -1; // packet not sent to controller 3658 } 3659 conn->state = SEND_CREATE_CONNECTION; 3660 } 3661 log_info("conn state %u", conn->state); 3662 switch (conn->state){ 3663 // if connection active exists 3664 case OPEN: 3665 // and OPEN, emit connection complete command 3666 hci_emit_connection_complete(addr, conn->con_handle, 0); 3667 return -1; // packet not sent to controller 3668 case SEND_CREATE_CONNECTION: 3669 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 3670 break; 3671 default: 3672 // otherwise, just ignore as it is already in the open process 3673 return -1; // packet not sent to controller 3674 } 3675 conn->state = SENT_CREATE_CONNECTION; 3676 3677 // track outgoing connection 3678 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_CLASSIC; 3679 memcpy(hci_stack->outgoing_addr, addr, 6); 3680 } 3681 3682 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3683 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3684 } 3685 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3686 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3687 } 3688 3689 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3690 if (hci_stack->link_key_db){ 3691 reverse_bd_addr(&packet[3], addr); 3692 hci_stack->link_key_db->delete_link_key(addr); 3693 } 3694 } 3695 3696 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3697 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3698 reverse_bd_addr(&packet[3], addr); 3699 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3700 if (conn){ 3701 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3702 } 3703 } 3704 3705 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3706 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3707 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3708 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3709 reverse_bd_addr(&packet[3], addr); 3710 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3711 if (conn){ 3712 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3713 } 3714 } 3715 3716 #ifdef ENABLE_SCO_OVER_HCI 3717 // setup_synchronous_connection? Voice setting at offset 22 3718 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3719 // TODO: compare to current setting if sco connection already active 3720 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3721 } 3722 // accept_synchronus_connection? Voice setting at offset 18 3723 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3724 // TODO: compare to current setting if sco connection already active 3725 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3726 } 3727 #endif 3728 #endif 3729 3730 #ifdef ENABLE_BLE 3731 #ifdef ENABLE_LE_PERIPHERAL 3732 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3733 hci_stack->le_random_address_set = 1; 3734 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3735 } 3736 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3737 hci_stack->le_advertisements_active = packet[3]; 3738 } 3739 #endif 3740 #ifdef ENABLE_LE_CENTRAL 3741 if (IS_COMMAND(packet, hci_le_create_connection)){ 3742 // white list used? 3743 uint8_t initiator_filter_policy = packet[7]; 3744 switch (initiator_filter_policy){ 3745 case 0: 3746 // whitelist not used 3747 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3748 break; 3749 case 1: 3750 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3751 break; 3752 default: 3753 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3754 break; 3755 } 3756 } 3757 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3758 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3759 } 3760 #endif 3761 #endif 3762 3763 hci_stack->num_cmd_packets--; 3764 3765 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3766 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3767 } 3768 3769 // disconnect because of security block 3770 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3771 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3772 if (!connection) return; 3773 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3774 } 3775 3776 3777 // Configure Secure Simple Pairing 3778 3779 #ifdef ENABLE_CLASSIC 3780 3781 // enable will enable SSP during init 3782 void gap_ssp_set_enable(int enable){ 3783 hci_stack->ssp_enable = enable; 3784 } 3785 3786 static int hci_local_ssp_activated(void){ 3787 return gap_ssp_supported() && hci_stack->ssp_enable; 3788 } 3789 3790 // if set, BTstack will respond to io capability request using authentication requirement 3791 void gap_ssp_set_io_capability(int io_capability){ 3792 hci_stack->ssp_io_capability = io_capability; 3793 } 3794 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3795 hci_stack->ssp_authentication_requirement = authentication_requirement; 3796 } 3797 3798 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3799 void gap_ssp_set_auto_accept(int auto_accept){ 3800 hci_stack->ssp_auto_accept = auto_accept; 3801 } 3802 #endif 3803 3804 // va_list part of hci_send_cmd 3805 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3806 if (!hci_can_send_command_packet_now()){ 3807 log_error("hci_send_cmd called but cannot send packet now"); 3808 return 0; 3809 } 3810 3811 // for HCI INITIALIZATION 3812 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3813 hci_stack->last_cmd_opcode = cmd->opcode; 3814 3815 hci_reserve_packet_buffer(); 3816 uint8_t * packet = hci_stack->hci_packet_buffer; 3817 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3818 int err = hci_send_cmd_packet(packet, size); 3819 3820 // release packet buffer for synchronous transport implementations 3821 if (hci_transport_synchronous()){ 3822 hci_release_packet_buffer(); 3823 hci_emit_transport_packet_sent(); 3824 } 3825 3826 return err; 3827 } 3828 3829 /** 3830 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3831 */ 3832 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3833 va_list argptr; 3834 va_start(argptr, cmd); 3835 int res = hci_send_cmd_va_arg(cmd, argptr); 3836 va_end(argptr); 3837 return res; 3838 } 3839 3840 // Create various non-HCI events. 3841 // TODO: generalize, use table similar to hci_create_command 3842 3843 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3844 // dump packet 3845 if (dump) { 3846 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3847 } 3848 3849 // dispatch to all event handlers 3850 btstack_linked_list_iterator_t it; 3851 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3852 while (btstack_linked_list_iterator_has_next(&it)){ 3853 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3854 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3855 } 3856 } 3857 3858 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3859 if (!hci_stack->acl_packet_handler) return; 3860 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3861 } 3862 3863 #ifdef ENABLE_CLASSIC 3864 static void hci_notify_if_sco_can_send_now(void){ 3865 // notify SCO sender if waiting 3866 if (!hci_stack->sco_waiting_for_can_send_now) return; 3867 if (hci_can_send_sco_packet_now()){ 3868 hci_stack->sco_waiting_for_can_send_now = 0; 3869 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3870 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3871 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3872 } 3873 } 3874 3875 // parsing end emitting has been merged to reduce code size 3876 static void gap_inquiry_explode(uint8_t * packet){ 3877 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 3878 3879 uint8_t * eir_data; 3880 ad_context_t context; 3881 const uint8_t * name; 3882 uint8_t name_len; 3883 3884 int event_type = hci_event_packet_get_type(packet); 3885 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 3886 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 3887 3888 // event[1] is set at the end 3889 int i; 3890 for (i=0; i<num_responses;i++){ 3891 memset(event, 0, sizeof(event)); 3892 event[0] = GAP_EVENT_INQUIRY_RESULT; 3893 uint8_t event_size = 18; // if name is not set by EIR 3894 3895 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 3896 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 3897 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 3898 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 3899 3900 switch (event_type){ 3901 case HCI_EVENT_INQUIRY_RESULT: 3902 // 14,15,16,17 = 0, size 18 3903 break; 3904 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3905 event[14] = 1; 3906 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3907 // 16,17 = 0, size 18 3908 break; 3909 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3910 event[14] = 1; 3911 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3912 // for EIR packets, there is only one reponse in it 3913 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 3914 name = NULL; 3915 // EIR data is 240 bytes in EIR event 3916 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 3917 uint8_t data_type = ad_iterator_get_data_type(&context); 3918 uint8_t data_size = ad_iterator_get_data_len(&context); 3919 const uint8_t * data = ad_iterator_get_data(&context); 3920 // Prefer Complete Local Name over Shortend Local Name 3921 switch (data_type){ 3922 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 3923 if (name) continue; 3924 /* explicit fall-through */ 3925 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 3926 name = data; 3927 name_len = data_size; 3928 break; 3929 default: 3930 break; 3931 } 3932 } 3933 if (name){ 3934 event[16] = 1; 3935 // truncate name if needed 3936 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 3937 event[17] = len; 3938 memcpy(&event[18], name, len); 3939 event_size += len; 3940 } 3941 break; 3942 } 3943 event[1] = event_size - 2; 3944 hci_emit_event(event, event_size, 1); 3945 } 3946 } 3947 #endif 3948 3949 void hci_emit_state(void){ 3950 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3951 uint8_t event[3]; 3952 event[0] = BTSTACK_EVENT_STATE; 3953 event[1] = sizeof(event) - 2; 3954 event[2] = hci_stack->state; 3955 hci_emit_event(event, sizeof(event), 1); 3956 } 3957 3958 #ifdef ENABLE_CLASSIC 3959 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3960 uint8_t event[13]; 3961 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3962 event[1] = sizeof(event) - 2; 3963 event[2] = status; 3964 little_endian_store_16(event, 3, con_handle); 3965 reverse_bd_addr(address, &event[5]); 3966 event[11] = 1; // ACL connection 3967 event[12] = 0; // encryption disabled 3968 hci_emit_event(event, sizeof(event), 1); 3969 } 3970 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3971 if (disable_l2cap_timeouts) return; 3972 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3973 uint8_t event[4]; 3974 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3975 event[1] = sizeof(event) - 2; 3976 little_endian_store_16(event, 2, conn->con_handle); 3977 hci_emit_event(event, sizeof(event), 1); 3978 } 3979 #endif 3980 3981 #ifdef ENABLE_BLE 3982 #ifdef ENABLE_LE_CENTRAL 3983 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3984 uint8_t event[21]; 3985 event[0] = HCI_EVENT_LE_META; 3986 event[1] = sizeof(event) - 2; 3987 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3988 event[3] = status; 3989 little_endian_store_16(event, 4, con_handle); 3990 event[6] = 0; // TODO: role 3991 event[7] = address_type; 3992 reverse_bd_addr(address, &event[8]); 3993 little_endian_store_16(event, 14, 0); // interval 3994 little_endian_store_16(event, 16, 0); // latency 3995 little_endian_store_16(event, 18, 0); // supervision timeout 3996 event[20] = 0; // master clock accuracy 3997 hci_emit_event(event, sizeof(event), 1); 3998 } 3999 #endif 4000 #endif 4001 4002 static void hci_emit_transport_packet_sent(void){ 4003 // notify upper stack that it might be possible to send again 4004 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4005 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4006 } 4007 4008 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4009 uint8_t event[6]; 4010 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4011 event[1] = sizeof(event) - 2; 4012 event[2] = 0; // status = OK 4013 little_endian_store_16(event, 3, con_handle); 4014 event[5] = reason; 4015 hci_emit_event(event, sizeof(event), 1); 4016 } 4017 4018 static void hci_emit_nr_connections_changed(void){ 4019 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4020 uint8_t event[3]; 4021 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4022 event[1] = sizeof(event) - 2; 4023 event[2] = nr_hci_connections(); 4024 hci_emit_event(event, sizeof(event), 1); 4025 } 4026 4027 static void hci_emit_hci_open_failed(void){ 4028 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4029 uint8_t event[2]; 4030 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4031 event[1] = sizeof(event) - 2; 4032 hci_emit_event(event, sizeof(event), 1); 4033 } 4034 4035 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4036 log_info("hci_emit_dedicated_bonding_result %u ", status); 4037 uint8_t event[9]; 4038 int pos = 0; 4039 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4040 event[pos++] = sizeof(event) - 2; 4041 event[pos++] = status; 4042 reverse_bd_addr(address, &event[pos]); 4043 hci_emit_event(event, sizeof(event), 1); 4044 } 4045 4046 4047 #ifdef ENABLE_CLASSIC 4048 4049 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4050 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4051 uint8_t event[5]; 4052 int pos = 0; 4053 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4054 event[pos++] = sizeof(event) - 2; 4055 little_endian_store_16(event, 2, con_handle); 4056 pos += 2; 4057 event[pos++] = level; 4058 hci_emit_event(event, sizeof(event), 1); 4059 } 4060 4061 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4062 if (!connection) return LEVEL_0; 4063 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4064 return gap_security_level_for_link_key_type(connection->link_key_type); 4065 } 4066 4067 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4068 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4069 uint8_t event[3]; 4070 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4071 event[1] = sizeof(event) - 2; 4072 event[2] = enabled; 4073 hci_emit_event(event, sizeof(event), 1); 4074 } 4075 4076 #ifdef ENABLE_CLASSIC 4077 // query if remote side supports eSCO 4078 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4079 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4080 if (!connection) return 0; 4081 return connection->remote_supported_feature_eSCO; 4082 } 4083 4084 // query if remote side supports SSP 4085 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4086 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4087 if (!connection) return 0; 4088 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 4089 } 4090 4091 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4092 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4093 } 4094 #endif 4095 4096 // GAP API 4097 /** 4098 * @bbrief enable/disable bonding. default is enabled 4099 * @praram enabled 4100 */ 4101 void gap_set_bondable_mode(int enable){ 4102 hci_stack->bondable = enable ? 1 : 0; 4103 } 4104 /** 4105 * @brief Get bondable mode. 4106 * @return 1 if bondable 4107 */ 4108 int gap_get_bondable_mode(void){ 4109 return hci_stack->bondable; 4110 } 4111 4112 /** 4113 * @brief map link keys to security levels 4114 */ 4115 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4116 switch (link_key_type){ 4117 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4118 return LEVEL_4; 4119 case COMBINATION_KEY: 4120 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4121 return LEVEL_3; 4122 default: 4123 return LEVEL_2; 4124 } 4125 } 4126 4127 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4128 log_info("gap_mitm_protection_required_for_security_level %u", level); 4129 return level > LEVEL_2; 4130 } 4131 4132 /** 4133 * @brief get current security level 4134 */ 4135 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4136 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4137 if (!connection) return LEVEL_0; 4138 return gap_security_level_for_connection(connection); 4139 } 4140 4141 /** 4142 * @brief request connection to device to 4143 * @result GAP_AUTHENTICATION_RESULT 4144 */ 4145 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4146 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4147 if (!connection){ 4148 hci_emit_security_level(con_handle, LEVEL_0); 4149 return; 4150 } 4151 gap_security_level_t current_level = gap_security_level(con_handle); 4152 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4153 requested_level, connection->requested_security_level, current_level); 4154 4155 // assumption: earlier requested security higher than current level => security request is active 4156 if (current_level < connection->requested_security_level){ 4157 if (connection->requested_security_level < requested_level){ 4158 // increase requested level as new level is higher 4159 4160 // TODO: handle re-authentication when done 4161 4162 connection->requested_security_level = requested_level; 4163 } 4164 return; 4165 } 4166 4167 // no request active, notify if security sufficient 4168 if (requested_level <= current_level){ 4169 hci_emit_security_level(con_handle, current_level); 4170 return; 4171 } 4172 4173 // start pairing to increase security level 4174 connection->requested_security_level = requested_level; 4175 4176 #if 0 4177 // sending encryption request without a link key results in an error. 4178 // TODO: figure out how to use it properly 4179 4180 // would enabling ecnryption suffice (>= LEVEL_2)? 4181 if (hci_stack->link_key_db){ 4182 link_key_type_t link_key_type; 4183 link_key_t link_key; 4184 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4185 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4186 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4187 return; 4188 } 4189 } 4190 } 4191 #endif 4192 4193 // start to authenticate connection 4194 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4195 hci_run(); 4196 } 4197 4198 /** 4199 * @brief start dedicated bonding with device. disconnect after bonding 4200 * @param device 4201 * @param request MITM protection 4202 * @result GAP_DEDICATED_BONDING_COMPLETE 4203 */ 4204 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4205 4206 // create connection state machine 4207 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 4208 4209 if (!connection){ 4210 return BTSTACK_MEMORY_ALLOC_FAILED; 4211 } 4212 4213 // delete linkn key 4214 gap_drop_link_key_for_bd_addr(device); 4215 4216 // configure LEVEL_2/3, dedicated bonding 4217 connection->state = SEND_CREATE_CONNECTION; 4218 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4219 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4220 connection->bonding_flags = BONDING_DEDICATED; 4221 4222 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4223 4224 // handle: connnection failure (connection complete != ok) 4225 // handle: authentication failure 4226 // handle: disconnect on done 4227 4228 hci_run(); 4229 4230 return 0; 4231 } 4232 #endif 4233 4234 void gap_set_local_name(const char * local_name){ 4235 hci_stack->local_name = local_name; 4236 } 4237 4238 4239 #ifdef ENABLE_BLE 4240 4241 #ifdef ENABLE_LE_CENTRAL 4242 void gap_start_scan(void){ 4243 hci_stack->le_scanning_enabled = 1; 4244 hci_run(); 4245 } 4246 4247 void gap_stop_scan(void){ 4248 hci_stack->le_scanning_enabled = 0; 4249 hci_run(); 4250 } 4251 4252 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4253 hci_stack->le_scan_type = scan_type; 4254 hci_stack->le_scan_interval = scan_interval; 4255 hci_stack->le_scan_window = scan_window; 4256 hci_run(); 4257 } 4258 4259 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4260 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4261 if (!conn){ 4262 log_info("gap_connect: no connection exists yet, creating context"); 4263 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4264 if (!conn){ 4265 // notify client that alloc failed 4266 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4267 log_info("gap_connect: failed to alloc hci_connection_t"); 4268 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4269 } 4270 conn->state = SEND_CREATE_CONNECTION; 4271 log_info("gap_connect: send create connection next"); 4272 hci_run(); 4273 return 0; 4274 } 4275 4276 if (!hci_is_le_connection(conn) || 4277 conn->state == SEND_CREATE_CONNECTION || 4278 conn->state == SENT_CREATE_CONNECTION) { 4279 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4280 log_error("gap_connect: classic connection or connect is already being created"); 4281 return GATT_CLIENT_IN_WRONG_STATE; 4282 } 4283 4284 log_info("gap_connect: context exists with state %u", conn->state); 4285 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4286 hci_run(); 4287 return 0; 4288 } 4289 4290 // @assumption: only a single outgoing LE Connection exists 4291 static hci_connection_t * gap_get_outgoing_connection(void){ 4292 btstack_linked_item_t *it; 4293 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4294 hci_connection_t * conn = (hci_connection_t *) it; 4295 if (!hci_is_le_connection(conn)) continue; 4296 switch (conn->state){ 4297 case SEND_CREATE_CONNECTION: 4298 case SENT_CREATE_CONNECTION: 4299 case SENT_CANCEL_CONNECTION: 4300 return conn; 4301 default: 4302 break; 4303 }; 4304 } 4305 return NULL; 4306 } 4307 4308 uint8_t gap_connect_cancel(void){ 4309 hci_connection_t * conn = gap_get_outgoing_connection(); 4310 if (!conn) return 0; 4311 switch (conn->state){ 4312 case SEND_CREATE_CONNECTION: 4313 // skip sending create connection and emit event instead 4314 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4315 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4316 btstack_memory_hci_connection_free( conn ); 4317 break; 4318 case SENT_CREATE_CONNECTION: 4319 // request to send cancel connection 4320 conn->state = SEND_CANCEL_CONNECTION; 4321 hci_run(); 4322 break; 4323 default: 4324 break; 4325 } 4326 return 0; 4327 } 4328 #endif 4329 4330 #ifdef ENABLE_LE_CENTRAL 4331 /** 4332 * @brief Set connection parameters for outgoing connections 4333 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4334 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4335 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4336 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4337 * @param conn_latency, default: 4 4338 * @param supervision_timeout (unit: 10ms), default: 720 ms 4339 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4340 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4341 */ 4342 4343 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4344 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4345 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4346 hci_stack->le_connection_scan_interval = conn_scan_interval; 4347 hci_stack->le_connection_scan_window = conn_scan_window; 4348 hci_stack->le_connection_interval_min = conn_interval_min; 4349 hci_stack->le_connection_interval_max = conn_interval_max; 4350 hci_stack->le_connection_latency = conn_latency; 4351 hci_stack->le_supervision_timeout = supervision_timeout; 4352 hci_stack->le_minimum_ce_length = min_ce_length; 4353 hci_stack->le_maximum_ce_length = max_ce_length; 4354 } 4355 #endif 4356 4357 /** 4358 * @brief Updates the connection parameters for a given LE connection 4359 * @param handle 4360 * @param conn_interval_min (unit: 1.25ms) 4361 * @param conn_interval_max (unit: 1.25ms) 4362 * @param conn_latency 4363 * @param supervision_timeout (unit: 10ms) 4364 * @returns 0 if ok 4365 */ 4366 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4367 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4368 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4369 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4370 connection->le_conn_interval_min = conn_interval_min; 4371 connection->le_conn_interval_max = conn_interval_max; 4372 connection->le_conn_latency = conn_latency; 4373 connection->le_supervision_timeout = supervision_timeout; 4374 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4375 hci_run(); 4376 return 0; 4377 } 4378 4379 /** 4380 * @brief Request an update of the connection parameter for a given LE connection 4381 * @param handle 4382 * @param conn_interval_min (unit: 1.25ms) 4383 * @param conn_interval_max (unit: 1.25ms) 4384 * @param conn_latency 4385 * @param supervision_timeout (unit: 10ms) 4386 * @returns 0 if ok 4387 */ 4388 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4389 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4390 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4391 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4392 connection->le_conn_interval_min = conn_interval_min; 4393 connection->le_conn_interval_max = conn_interval_max; 4394 connection->le_conn_latency = conn_latency; 4395 connection->le_supervision_timeout = supervision_timeout; 4396 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4397 hci_run(); 4398 return 0; 4399 } 4400 4401 #ifdef ENABLE_LE_PERIPHERAL 4402 4403 static void gap_advertisments_changed(void){ 4404 // disable advertisements before updating adv, scan data, or adv params 4405 if (hci_stack->le_advertisements_active){ 4406 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4407 } 4408 hci_run(); 4409 } 4410 4411 /** 4412 * @brief Set Advertisement Data 4413 * @param advertising_data_length 4414 * @param advertising_data (max 31 octets) 4415 * @note data is not copied, pointer has to stay valid 4416 */ 4417 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4418 hci_stack->le_advertisements_data_len = advertising_data_length; 4419 hci_stack->le_advertisements_data = advertising_data; 4420 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4421 gap_advertisments_changed(); 4422 } 4423 4424 /** 4425 * @brief Set Scan Response Data 4426 * @param advertising_data_length 4427 * @param advertising_data (max 31 octets) 4428 * @note data is not copied, pointer has to stay valid 4429 */ 4430 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4431 hci_stack->le_scan_response_data_len = scan_response_data_length; 4432 hci_stack->le_scan_response_data = scan_response_data; 4433 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4434 gap_advertisments_changed(); 4435 } 4436 4437 /** 4438 * @brief Set Advertisement Parameters 4439 * @param adv_int_min 4440 * @param adv_int_max 4441 * @param adv_type 4442 * @param direct_address_type 4443 * @param direct_address 4444 * @param channel_map 4445 * @param filter_policy 4446 * 4447 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4448 */ 4449 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4450 uint8_t direct_address_typ, bd_addr_t direct_address, 4451 uint8_t channel_map, uint8_t filter_policy) { 4452 4453 hci_stack->le_advertisements_interval_min = adv_int_min; 4454 hci_stack->le_advertisements_interval_max = adv_int_max; 4455 hci_stack->le_advertisements_type = adv_type; 4456 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4457 hci_stack->le_advertisements_channel_map = channel_map; 4458 hci_stack->le_advertisements_filter_policy = filter_policy; 4459 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4460 4461 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4462 gap_advertisments_changed(); 4463 } 4464 4465 /** 4466 * @brief Enable/Disable Advertisements 4467 * @param enabled 4468 */ 4469 void gap_advertisements_enable(int enabled){ 4470 hci_stack->le_advertisements_enabled = enabled; 4471 if (enabled && !hci_stack->le_advertisements_active){ 4472 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4473 } 4474 if (!enabled && hci_stack->le_advertisements_active){ 4475 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4476 } 4477 hci_run(); 4478 } 4479 4480 #endif 4481 4482 void hci_le_set_own_address_type(uint8_t own_address_type){ 4483 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4484 if (own_address_type == hci_stack->le_own_addr_type) return; 4485 hci_stack->le_own_addr_type = own_address_type; 4486 4487 #ifdef ENABLE_LE_PERIPHERAL 4488 // update advertisement parameters, too 4489 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4490 gap_advertisments_changed(); 4491 #endif 4492 #ifdef ENABLE_LE_CENTRAL 4493 // note: we don't update scan parameters or modify ongoing connection attempts 4494 #endif 4495 } 4496 4497 #endif 4498 4499 uint8_t gap_disconnect(hci_con_handle_t handle){ 4500 hci_connection_t * conn = hci_connection_for_handle(handle); 4501 if (!conn){ 4502 hci_emit_disconnection_complete(handle, 0); 4503 return 0; 4504 } 4505 // ignore if already disconnected 4506 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4507 return 0; 4508 } 4509 conn->state = SEND_DISCONNECT; 4510 hci_run(); 4511 return 0; 4512 } 4513 4514 /** 4515 * @brief Get connection type 4516 * @param con_handle 4517 * @result connection_type 4518 */ 4519 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4520 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4521 if (!conn) return GAP_CONNECTION_INVALID; 4522 switch (conn->address_type){ 4523 case BD_ADDR_TYPE_LE_PUBLIC: 4524 case BD_ADDR_TYPE_LE_RANDOM: 4525 return GAP_CONNECTION_LE; 4526 case BD_ADDR_TYPE_SCO: 4527 return GAP_CONNECTION_SCO; 4528 case BD_ADDR_TYPE_CLASSIC: 4529 return GAP_CONNECTION_ACL; 4530 default: 4531 return GAP_CONNECTION_INVALID; 4532 } 4533 } 4534 4535 #ifdef ENABLE_BLE 4536 4537 #ifdef ENABLE_LE_CENTRAL 4538 /** 4539 * @brief Auto Connection Establishment - Start Connecting to device 4540 * @param address_typ 4541 * @param address 4542 * @returns 0 if ok 4543 */ 4544 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4545 // check capacity 4546 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4547 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4548 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4549 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4550 entry->address_type = address_type; 4551 memcpy(entry->address, address, 6); 4552 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4553 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4554 hci_run(); 4555 return 0; 4556 } 4557 4558 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4559 btstack_linked_list_iterator_t it; 4560 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4561 while (btstack_linked_list_iterator_has_next(&it)){ 4562 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4563 if (entry->address_type != address_type) continue; 4564 if (memcmp(entry->address, address, 6) != 0) continue; 4565 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4566 // remove from controller if already present 4567 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4568 continue; 4569 } 4570 // direclty remove entry from whitelist 4571 btstack_linked_list_iterator_remove(&it); 4572 btstack_memory_whitelist_entry_free(entry); 4573 } 4574 } 4575 4576 /** 4577 * @brief Auto Connection Establishment - Stop Connecting to device 4578 * @param address_typ 4579 * @param address 4580 * @returns 0 if ok 4581 */ 4582 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4583 hci_remove_from_whitelist(address_type, address); 4584 hci_run(); 4585 return 0; 4586 } 4587 4588 /** 4589 * @brief Auto Connection Establishment - Stop everything 4590 * @note Convenience function to stop all active auto connection attempts 4591 */ 4592 void gap_auto_connection_stop_all(void){ 4593 btstack_linked_list_iterator_t it; 4594 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4595 while (btstack_linked_list_iterator_has_next(&it)){ 4596 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4597 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4598 // remove from controller if already present 4599 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4600 continue; 4601 } 4602 // directly remove entry from whitelist 4603 btstack_linked_list_iterator_remove(&it); 4604 btstack_memory_whitelist_entry_free(entry); 4605 } 4606 hci_run(); 4607 } 4608 4609 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 4610 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4611 if (!conn) return 0; 4612 return conn->le_connection_interval; 4613 } 4614 #endif 4615 #endif 4616 4617 #ifdef ENABLE_CLASSIC 4618 /** 4619 * @brief Set Extended Inquiry Response data 4620 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4621 * @note has to be done before stack starts up 4622 */ 4623 void gap_set_extended_inquiry_response(const uint8_t * data){ 4624 hci_stack->eir_data = data; 4625 } 4626 4627 /** 4628 * @brief Start GAP Classic Inquiry 4629 * @param duration in 1.28s units 4630 * @return 0 if ok 4631 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4632 */ 4633 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4634 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 4635 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4636 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4637 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4638 } 4639 hci_stack->inquiry_state = duration_in_1280ms_units; 4640 hci_run(); 4641 return 0; 4642 } 4643 4644 /** 4645 * @brief Stop GAP Classic Inquiry 4646 * @returns 0 if ok 4647 */ 4648 int gap_inquiry_stop(void){ 4649 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4650 // emit inquiry complete event, before it even started 4651 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4652 hci_emit_event(event, sizeof(event), 1); 4653 return 0; 4654 } 4655 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4656 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4657 hci_run(); 4658 return 0; 4659 } 4660 4661 4662 /** 4663 * @brief Remote Name Request 4664 * @param addr 4665 * @param page_scan_repetition_mode 4666 * @param clock_offset only used when bit 15 is set 4667 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4668 */ 4669 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4670 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4671 memcpy(hci_stack->remote_name_addr, addr, 6); 4672 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4673 hci_stack->remote_name_clock_offset = clock_offset; 4674 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4675 hci_run(); 4676 return 0; 4677 } 4678 4679 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4680 hci_stack->gap_pairing_state = state; 4681 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4682 hci_run(); 4683 return 0; 4684 } 4685 4686 /** 4687 * @brief Legacy Pairing Pin Code Response 4688 * @param addr 4689 * @param pin 4690 * @return 0 if ok 4691 */ 4692 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4693 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4694 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 4695 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4696 } 4697 4698 /** 4699 * @brief Abort Legacy Pairing 4700 * @param addr 4701 * @param pin 4702 * @return 0 if ok 4703 */ 4704 int gap_pin_code_negative(bd_addr_t addr){ 4705 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4706 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4707 } 4708 4709 /** 4710 * @brief SSP Passkey Response 4711 * @param addr 4712 * @param passkey 4713 * @return 0 if ok 4714 */ 4715 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4716 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4717 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 4718 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4719 } 4720 4721 /** 4722 * @brief Abort SSP Passkey Entry/Pairing 4723 * @param addr 4724 * @param pin 4725 * @return 0 if ok 4726 */ 4727 int gap_ssp_passkey_negative(bd_addr_t addr){ 4728 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4729 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 4730 } 4731 4732 /** 4733 * @brief Accept SSP Numeric Comparison 4734 * @param addr 4735 * @param passkey 4736 * @return 0 if ok 4737 */ 4738 int gap_ssp_confirmation_response(bd_addr_t addr){ 4739 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4740 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 4741 } 4742 4743 /** 4744 * @brief Abort SSP Numeric Comparison/Pairing 4745 * @param addr 4746 * @param pin 4747 * @return 0 if ok 4748 */ 4749 int gap_ssp_confirmation_negative(bd_addr_t addr){ 4750 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4751 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 4752 } 4753 4754 /** 4755 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4756 * @param inquiry_mode see bluetooth_defines.h 4757 */ 4758 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4759 hci_stack->inquiry_mode = mode; 4760 } 4761 4762 /** 4763 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4764 */ 4765 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4766 hci_stack->sco_voice_setting = voice_setting; 4767 } 4768 4769 /** 4770 * @brief Get SCO Voice Setting 4771 * @return current voice setting 4772 */ 4773 uint16_t hci_get_sco_voice_setting(void){ 4774 return hci_stack->sco_voice_setting; 4775 } 4776 4777 /** @brief Get SCO packet length for current SCO Voice setting 4778 * @note Using SCO packets of the exact length is required for USB transfer 4779 * @return Length of SCO packets in bytes (not audio frames) 4780 */ 4781 int hci_get_sco_packet_length(void){ 4782 int sco_packet_length = 0; 4783 4784 #ifdef ENABLE_CLASSIC 4785 #ifdef ENABLE_SCO_OVER_HCI 4786 // see Core Spec for H2 USB Transfer. 4787 4788 // CVSD requires twice as much bytes 4789 int multiplier = hci_stack->sco_voice_setting & 0x0020 ? 2 : 1; 4790 4791 // 3 byte SCO header + 24 bytes per connection 4792 sco_packet_length = 3 + 24 * hci_number_sco_connections() * multiplier; 4793 #endif 4794 #endif 4795 return sco_packet_length; 4796 } 4797 4798 /** 4799 * @brief Sets the master/slave policy 4800 * @param policy (0: attempt to become master, 1: let connecting device decide) 4801 */ 4802 void hci_set_master_slave_policy(uint8_t policy){ 4803 hci_stack->master_slave_policy = policy; 4804 } 4805 4806 #endif 4807 4808 HCI_STATE hci_get_state(void){ 4809 return hci_stack->state; 4810 } 4811 4812 4813 /** 4814 * @brief Set callback for Bluetooth Hardware Error 4815 */ 4816 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 4817 hci_stack->hardware_error_callback = fn; 4818 } 4819 4820 void hci_disconnect_all(void){ 4821 btstack_linked_list_iterator_t it; 4822 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4823 while (btstack_linked_list_iterator_has_next(&it)){ 4824 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4825 if (con->state == SENT_DISCONNECT) continue; 4826 con->state = SEND_DISCONNECT; 4827 } 4828 hci_run(); 4829 } 4830 4831 uint16_t hci_get_manufacturer(void){ 4832 return hci_stack->manufacturer; 4833 } 4834 4835 #ifdef ENABLE_BLE 4836 4837 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 4838 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 4839 if (!hci_con) return NULL; 4840 return &hci_con->sm_connection; 4841 } 4842 4843 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 4844 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 4845 4846 int gap_encryption_key_size(hci_con_handle_t con_handle){ 4847 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4848 if (!sm_conn) return 0; // wrong connection 4849 if (!sm_conn->sm_connection_encrypted) return 0; 4850 return sm_conn->sm_actual_encryption_key_size; 4851 } 4852 4853 int gap_authenticated(hci_con_handle_t con_handle){ 4854 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4855 if (!sm_conn) return 0; // wrong connection 4856 if (!sm_conn->sm_connection_encrypted) return 0; // unencrypted connection cannot be authenticated 4857 return sm_conn->sm_connection_authenticated; 4858 } 4859 4860 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 4861 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4862 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 4863 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 4864 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 4865 return sm_conn->sm_connection_authorization_state; 4866 } 4867 #endif 4868 4869 #ifdef ENABLE_CLASSIC 4870 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){ 4871 hci_connection_t * conn = hci_connection_for_handle(con_handle); 4872 if (!conn) return GAP_CONNECTION_INVALID; 4873 conn->sniff_min_interval = sniff_min_interval; 4874 conn->sniff_max_interval = sniff_max_interval; 4875 conn->sniff_attempt = sniff_attempt; 4876 conn->sniff_timeout = sniff_timeout; 4877 hci_run(); 4878 return 0; 4879 } 4880 4881 /** 4882 * @brief Exit Sniff mode 4883 * @param con_handle 4884 @ @return 0 if ok 4885 */ 4886 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 4887 hci_connection_t * conn = hci_connection_for_handle(con_handle); 4888 if (!conn) return GAP_CONNECTION_INVALID; 4889 conn->sniff_min_interval = 0xffff; 4890 hci_run(); 4891 return 0; 4892 } 4893 #endif 4894