1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #endif 63 64 #include <stdarg.h> 65 #include <string.h> 66 #include <stdio.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 #define HCI_RESET_RESEND_TIMEOUT_MS 200 98 99 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 100 #ifndef GAP_INQUIRY_MAX_NAME_LEN 101 #define GAP_INQUIRY_MAX_NAME_LEN 32 102 #endif 103 104 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 105 #define GAP_INQUIRY_DURATION_MIN 0x01 106 #define GAP_INQUIRY_DURATION_MAX 0x30 107 #define GAP_INQUIRY_STATE_ACTIVE 0x80 108 #define GAP_INQUIRY_STATE_IDLE 0 109 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 110 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 111 112 // GAP Remote Name Request 113 #define GAP_REMOTE_NAME_STATE_IDLE 0 114 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 115 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 116 117 // GAP Pairing 118 #define GAP_PAIRING_STATE_IDLE 0 119 #define GAP_PAIRING_STATE_SEND_PIN 1 120 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 121 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 122 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 123 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 124 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 125 126 127 // prototypes 128 #ifdef ENABLE_CLASSIC 129 static void hci_update_scan_enable(void); 130 static void hci_emit_discoverable_enabled(uint8_t enabled); 131 static int hci_local_ssp_activated(void); 132 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 133 static void hci_notify_if_sco_can_send_now(void); 134 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 135 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 136 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 137 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 138 static void hci_connection_timestamp(hci_connection_t *connection); 139 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 140 static void gap_inquiry_explode(uint8_t * packet); 141 #endif 142 143 static int hci_power_control_on(void); 144 static void hci_power_control_off(void); 145 static void hci_state_reset(void); 146 static void hci_emit_transport_packet_sent(void); 147 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 148 static void hci_emit_nr_connections_changed(void); 149 static void hci_emit_hci_open_failed(void); 150 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 151 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 152 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 153 static void hci_run(void); 154 static int hci_is_le_connection(hci_connection_t * connection); 155 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 156 static int hci_have_usb_transport(void); 157 158 #ifdef ENABLE_BLE 159 #ifdef ENABLE_LE_CENTRAL 160 // called from test/ble_client/advertising_data_parser.c 161 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 162 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 163 static hci_connection_t * gap_get_outgoing_connection(void); 164 #endif 165 #endif 166 167 // the STACK is here 168 #ifndef HAVE_MALLOC 169 static hci_stack_t hci_stack_static; 170 #endif 171 static hci_stack_t * hci_stack = NULL; 172 173 #ifdef ENABLE_CLASSIC 174 // default name 175 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 176 177 // test helper 178 static uint8_t disable_l2cap_timeouts = 0; 179 #endif 180 181 /** 182 * create connection for given address 183 * 184 * @return connection OR NULL, if no memory left 185 */ 186 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 187 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 188 hci_connection_t * conn = btstack_memory_hci_connection_get(); 189 if (!conn) return NULL; 190 bd_addr_copy(conn->address, addr); 191 conn->address_type = addr_type; 192 conn->con_handle = 0xffff; 193 conn->authentication_flags = AUTH_FLAGS_NONE; 194 conn->bonding_flags = 0; 195 conn->requested_security_level = LEVEL_0; 196 #ifdef ENABLE_CLASSIC 197 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 198 btstack_run_loop_set_timer_context(&conn->timeout, conn); 199 hci_connection_timestamp(conn); 200 #endif 201 conn->acl_recombination_length = 0; 202 conn->acl_recombination_pos = 0; 203 conn->num_packets_sent = 0; 204 205 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 206 #ifdef ENABLE_BLE 207 conn->le_phy_update_all_phys = 0xff; 208 #endif 209 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 210 return conn; 211 } 212 213 214 /** 215 * get le connection parameter range 216 * 217 * @return le connection parameter range struct 218 */ 219 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 220 *range = hci_stack->le_connection_parameter_range; 221 } 222 223 /** 224 * set le connection parameter range 225 * 226 */ 227 228 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 229 hci_stack->le_connection_parameter_range = *range; 230 } 231 232 /** 233 * @brief Test if connection parameters are inside in existing rage 234 * @param conn_interval_min (unit: 1.25ms) 235 * @param conn_interval_max (unit: 1.25ms) 236 * @param conn_latency 237 * @param supervision_timeout (unit: 10ms) 238 * @returns 1 if included 239 */ 240 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 241 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 242 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 243 244 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 245 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 246 247 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 248 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 249 250 return 1; 251 } 252 253 /** 254 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 255 * @note: default: 1 256 * @param max_peripheral_connections 257 */ 258 #ifdef ENABLE_LE_PERIPHERAL 259 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 260 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 261 } 262 #endif 263 264 /** 265 * get hci connections iterator 266 * 267 * @return hci connections iterator 268 */ 269 270 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 271 btstack_linked_list_iterator_init(it, &hci_stack->connections); 272 } 273 274 /** 275 * get connection for a given handle 276 * 277 * @return connection OR NULL, if not found 278 */ 279 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 280 btstack_linked_list_iterator_t it; 281 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 282 while (btstack_linked_list_iterator_has_next(&it)){ 283 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 284 if ( item->con_handle == con_handle ) { 285 return item; 286 } 287 } 288 return NULL; 289 } 290 291 /** 292 * get connection for given address 293 * 294 * @return connection OR NULL, if not found 295 */ 296 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 297 btstack_linked_list_iterator_t it; 298 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 299 while (btstack_linked_list_iterator_has_next(&it)){ 300 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 301 if (connection->address_type != addr_type) continue; 302 if (memcmp(addr, connection->address, 6) != 0) continue; 303 return connection; 304 } 305 return NULL; 306 } 307 308 309 #ifdef ENABLE_CLASSIC 310 311 #ifdef ENABLE_SCO_OVER_HCI 312 static int hci_number_sco_connections(void){ 313 int connections = 0; 314 btstack_linked_list_iterator_t it; 315 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 316 while (btstack_linked_list_iterator_has_next(&it)){ 317 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 318 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 319 connections++; 320 } 321 return connections; 322 } 323 #endif 324 325 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 326 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 327 #ifdef HAVE_EMBEDDED_TICK 328 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 329 // connections might be timed out 330 hci_emit_l2cap_check_timeout(connection); 331 } 332 #else 333 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 334 // connections might be timed out 335 hci_emit_l2cap_check_timeout(connection); 336 } 337 #endif 338 } 339 340 static void hci_connection_timestamp(hci_connection_t *connection){ 341 #ifdef HAVE_EMBEDDED_TICK 342 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 343 #else 344 connection->timestamp = btstack_run_loop_get_time_ms(); 345 #endif 346 } 347 348 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 349 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 350 } 351 352 353 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 354 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 355 } 356 357 /** 358 * add authentication flags and reset timer 359 * @note: assumes classic connection 360 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 361 */ 362 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 363 bd_addr_t addr; 364 reverse_bd_addr(bd_addr, addr); 365 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 366 if (conn) { 367 connectionSetAuthenticationFlags(conn, flags); 368 hci_connection_timestamp(conn); 369 } 370 } 371 372 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 373 hci_connection_t * conn = hci_connection_for_handle(handle); 374 if (!conn) return 0; 375 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 376 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 377 return 0; 378 } 379 380 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 381 if (!hci_stack->link_key_db) return; 382 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 383 hci_stack->link_key_db->delete_link_key(addr); 384 } 385 386 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 387 if (!hci_stack->link_key_db) return; 388 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 389 hci_stack->link_key_db->put_link_key(addr, link_key, type); 390 } 391 392 void gap_delete_all_link_keys(void){ 393 bd_addr_t addr; 394 link_key_t link_key; 395 link_key_type_t type; 396 btstack_link_key_iterator_t it; 397 int ok = gap_link_key_iterator_init(&it); 398 if (!ok) { 399 log_error("could not initialize iterator"); 400 return; 401 } 402 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 403 gap_drop_link_key_for_bd_addr(addr); 404 } 405 gap_link_key_iterator_done(&it); 406 } 407 408 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 409 if (!hci_stack->link_key_db) return 0; 410 if (!hci_stack->link_key_db->iterator_init) return 0; 411 return hci_stack->link_key_db->iterator_init(it); 412 } 413 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 414 if (!hci_stack->link_key_db) return 0; 415 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 416 } 417 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 418 if (!hci_stack->link_key_db) return; 419 hci_stack->link_key_db->iterator_done(it); 420 } 421 #endif 422 423 static int hci_is_le_connection(hci_connection_t * connection){ 424 switch (connection->address_type){ 425 case BD_ADDR_TYPE_LE_PUBLIC: 426 case BD_ADDR_TYPE_LE_RANDOM: 427 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 428 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 429 return 1; 430 default: 431 return 0; 432 } 433 } 434 435 /** 436 * count connections 437 */ 438 static int nr_hci_connections(void){ 439 int count = 0; 440 btstack_linked_item_t *it; 441 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 442 return count; 443 } 444 445 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 446 447 unsigned int num_packets_sent_classic = 0; 448 unsigned int num_packets_sent_le = 0; 449 450 btstack_linked_item_t *it; 451 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 452 hci_connection_t * connection = (hci_connection_t *) it; 453 if (hci_is_le_connection(connection)){ 454 num_packets_sent_le += connection->num_packets_sent; 455 } 456 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 457 num_packets_sent_classic += connection->num_packets_sent; 458 } 459 } 460 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 461 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 462 int free_slots_le = 0; 463 464 if (free_slots_classic < 0){ 465 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 466 return 0; 467 } 468 469 if (hci_stack->le_acl_packets_total_num){ 470 // if we have LE slots, they are used 471 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 472 if (free_slots_le < 0){ 473 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 474 return 0; 475 } 476 } else { 477 // otherwise, classic slots are used for LE, too 478 free_slots_classic -= num_packets_sent_le; 479 if (free_slots_classic < 0){ 480 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 481 return 0; 482 } 483 } 484 485 switch (address_type){ 486 case BD_ADDR_TYPE_UNKNOWN: 487 log_error("hci_number_free_acl_slots: unknown address type"); 488 return 0; 489 490 case BD_ADDR_TYPE_CLASSIC: 491 return free_slots_classic; 492 493 default: 494 if (hci_stack->le_acl_packets_total_num){ 495 return free_slots_le; 496 } 497 return free_slots_classic; 498 } 499 } 500 501 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 502 // get connection type 503 hci_connection_t * connection = hci_connection_for_handle(con_handle); 504 if (!connection){ 505 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 506 return 0; 507 } 508 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 509 } 510 511 #ifdef ENABLE_CLASSIC 512 static int hci_number_free_sco_slots(void){ 513 unsigned int num_sco_packets_sent = 0; 514 btstack_linked_item_t *it; 515 if (hci_stack->synchronous_flow_control_enabled){ 516 // explicit flow control 517 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 518 hci_connection_t * connection = (hci_connection_t *) it; 519 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 520 num_sco_packets_sent += connection->num_packets_sent; 521 } 522 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 523 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 524 return 0; 525 } 526 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 527 } else { 528 // implicit flow control -- TODO 529 int num_ready = 0; 530 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 531 hci_connection_t * connection = (hci_connection_t *) it; 532 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 533 if (connection->sco_tx_ready == 0) continue; 534 num_ready++; 535 } 536 return num_ready; 537 } 538 } 539 #endif 540 541 // only used to send HCI Host Number Completed Packets 542 static int hci_can_send_comand_packet_transport(void){ 543 if (hci_stack->hci_packet_buffer_reserved) return 0; 544 545 // check for async hci transport implementations 546 if (hci_stack->hci_transport->can_send_packet_now){ 547 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 548 return 0; 549 } 550 } 551 return 1; 552 } 553 554 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 555 int hci_can_send_command_packet_now(void){ 556 if (hci_can_send_comand_packet_transport() == 0) return 0; 557 return hci_stack->num_cmd_packets > 0; 558 } 559 560 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 561 // check for async hci transport implementations 562 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 563 return hci_stack->hci_transport->can_send_packet_now(packet_type); 564 } 565 566 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 567 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 568 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 569 } 570 571 int hci_can_send_acl_le_packet_now(void){ 572 if (hci_stack->hci_packet_buffer_reserved) return 0; 573 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 574 } 575 576 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 577 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 578 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 579 } 580 581 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 582 if (hci_stack->hci_packet_buffer_reserved) return 0; 583 return hci_can_send_prepared_acl_packet_now(con_handle); 584 } 585 586 #ifdef ENABLE_CLASSIC 587 int hci_can_send_acl_classic_packet_now(void){ 588 if (hci_stack->hci_packet_buffer_reserved) return 0; 589 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 590 } 591 592 int hci_can_send_prepared_sco_packet_now(void){ 593 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 594 if (hci_have_usb_transport()){ 595 return hci_stack->sco_can_send_now; 596 } else { 597 return hci_number_free_sco_slots() > 0; 598 } 599 } 600 601 int hci_can_send_sco_packet_now(void){ 602 if (hci_stack->hci_packet_buffer_reserved) return 0; 603 return hci_can_send_prepared_sco_packet_now(); 604 } 605 606 void hci_request_sco_can_send_now_event(void){ 607 hci_stack->sco_waiting_for_can_send_now = 1; 608 hci_notify_if_sco_can_send_now(); 609 } 610 #endif 611 612 // used for internal checks in l2cap.c 613 int hci_is_packet_buffer_reserved(void){ 614 return hci_stack->hci_packet_buffer_reserved; 615 } 616 617 // reserves outgoing packet buffer. @returns 1 if successful 618 int hci_reserve_packet_buffer(void){ 619 if (hci_stack->hci_packet_buffer_reserved) { 620 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 621 return 0; 622 } 623 hci_stack->hci_packet_buffer_reserved = 1; 624 return 1; 625 } 626 627 void hci_release_packet_buffer(void){ 628 hci_stack->hci_packet_buffer_reserved = 0; 629 } 630 631 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 632 static int hci_transport_synchronous(void){ 633 return hci_stack->hci_transport->can_send_packet_now == NULL; 634 } 635 636 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 637 638 // 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); 639 640 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 641 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 642 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 643 max_acl_data_packet_length = hci_stack->le_data_packets_length; 644 } 645 646 // testing: reduce buffer to minimum 647 // max_acl_data_packet_length = 52; 648 649 log_debug("hci_send_acl_packet_fragments entered"); 650 651 int err; 652 // multiple packets could be send on a synchronous HCI transport 653 while (1){ 654 655 log_debug("hci_send_acl_packet_fragments loop entered"); 656 657 // get current data 658 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 659 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 660 int more_fragments = 0; 661 662 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 663 if (current_acl_data_packet_length > max_acl_data_packet_length){ 664 more_fragments = 1; 665 current_acl_data_packet_length = max_acl_data_packet_length; 666 } 667 668 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 669 if (acl_header_pos > 0){ 670 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 671 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 672 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 673 } 674 675 // update header len 676 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 677 678 // count packet 679 connection->num_packets_sent++; 680 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 681 682 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 683 if (more_fragments){ 684 // update start of next fragment to send 685 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 686 } else { 687 // done 688 hci_stack->acl_fragmentation_pos = 0; 689 hci_stack->acl_fragmentation_total_size = 0; 690 } 691 692 // send packet 693 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 694 const int size = current_acl_data_packet_length + 4; 695 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 696 hci_stack->acl_fragmentation_tx_active = 1; 697 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 698 699 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 700 701 // done yet? 702 if (!more_fragments) break; 703 704 // can send more? 705 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 706 } 707 708 log_debug("hci_send_acl_packet_fragments loop over"); 709 710 // release buffer now for synchronous transport 711 if (hci_transport_synchronous()){ 712 hci_stack->acl_fragmentation_tx_active = 0; 713 hci_release_packet_buffer(); 714 hci_emit_transport_packet_sent(); 715 } 716 717 return err; 718 } 719 720 // pre: caller has reserved the packet buffer 721 int hci_send_acl_packet_buffer(int size){ 722 723 // log_info("hci_send_acl_packet_buffer size %u", size); 724 725 if (!hci_stack->hci_packet_buffer_reserved) { 726 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 727 return 0; 728 } 729 730 uint8_t * packet = hci_stack->hci_packet_buffer; 731 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 732 733 // check for free places on Bluetooth module 734 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 735 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 736 hci_release_packet_buffer(); 737 hci_emit_transport_packet_sent(); 738 return BTSTACK_ACL_BUFFERS_FULL; 739 } 740 741 hci_connection_t *connection = hci_connection_for_handle( con_handle); 742 if (!connection) { 743 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 744 hci_release_packet_buffer(); 745 hci_emit_transport_packet_sent(); 746 return 0; 747 } 748 749 #ifdef ENABLE_CLASSIC 750 hci_connection_timestamp(connection); 751 #endif 752 753 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 754 755 // setup data 756 hci_stack->acl_fragmentation_total_size = size; 757 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 758 759 return hci_send_acl_packet_fragments(connection); 760 } 761 762 #ifdef ENABLE_CLASSIC 763 // pre: caller has reserved the packet buffer 764 int hci_send_sco_packet_buffer(int size){ 765 766 // log_info("hci_send_acl_packet_buffer size %u", size); 767 768 if (!hci_stack->hci_packet_buffer_reserved) { 769 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 770 return 0; 771 } 772 773 uint8_t * packet = hci_stack->hci_packet_buffer; 774 775 // skip checks in loopback mode 776 if (!hci_stack->loopback_mode){ 777 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 778 779 // check for free places on Bluetooth module 780 if (!hci_can_send_prepared_sco_packet_now()) { 781 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 782 hci_release_packet_buffer(); 783 hci_emit_transport_packet_sent(); 784 return BTSTACK_ACL_BUFFERS_FULL; 785 } 786 787 // track send packet in connection struct 788 hci_connection_t *connection = hci_connection_for_handle( con_handle); 789 if (!connection) { 790 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 791 hci_release_packet_buffer(); 792 hci_emit_transport_packet_sent(); 793 return 0; 794 } 795 796 if (hci_have_usb_transport()){ 797 // token used 798 hci_stack->sco_can_send_now = 0; 799 } else { 800 if (hci_stack->synchronous_flow_control_enabled){ 801 connection->num_packets_sent++; 802 } else { 803 connection->sco_tx_ready--; 804 } 805 } 806 } 807 808 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 809 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 810 811 if (hci_transport_synchronous()){ 812 hci_release_packet_buffer(); 813 hci_emit_transport_packet_sent(); 814 } 815 816 return err; 817 } 818 #endif 819 820 static void acl_handler(uint8_t *packet, int size){ 821 822 // log_info("acl_handler: size %u", size); 823 824 // get info 825 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 826 hci_connection_t *conn = hci_connection_for_handle(con_handle); 827 uint8_t acl_flags = READ_ACL_FLAGS(packet); 828 uint16_t acl_length = READ_ACL_LENGTH(packet); 829 830 // ignore non-registered handle 831 if (!conn){ 832 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 833 return; 834 } 835 836 // assert packet is complete 837 if (acl_length + 4 != size){ 838 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 839 return; 840 } 841 842 #ifdef ENABLE_CLASSIC 843 // update idle timestamp 844 hci_connection_timestamp(conn); 845 #endif 846 847 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 848 hci_stack->host_completed_packets = 1; 849 conn->num_packets_completed++; 850 #endif 851 852 // handle different packet types 853 switch (acl_flags & 0x03) { 854 855 case 0x01: // continuation fragment 856 857 // sanity checks 858 if (conn->acl_recombination_pos == 0) { 859 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 860 return; 861 } 862 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 863 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 864 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 865 conn->acl_recombination_pos = 0; 866 return; 867 } 868 869 // append fragment payload (header already stored) 870 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 871 conn->acl_recombination_pos += acl_length; 872 873 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 874 // conn->acl_recombination_pos, conn->acl_recombination_length); 875 876 // forward complete L2CAP packet if complete. 877 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 878 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 879 // reset recombination buffer 880 conn->acl_recombination_length = 0; 881 conn->acl_recombination_pos = 0; 882 } 883 break; 884 885 case 0x02: { // first fragment 886 887 // sanity check 888 if (conn->acl_recombination_pos) { 889 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 890 conn->acl_recombination_pos = 0; 891 } 892 893 // peek into L2CAP packet! 894 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 895 896 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 897 898 // compare fragment size to L2CAP packet size 899 if (acl_length >= l2cap_length + 4){ 900 // forward fragment as L2CAP packet 901 hci_emit_acl_packet(packet, acl_length + 4); 902 } else { 903 904 if (acl_length > HCI_ACL_BUFFER_SIZE){ 905 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 906 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 907 return; 908 } 909 910 // store first fragment and tweak acl length for complete package 911 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 912 conn->acl_recombination_pos = acl_length + 4; 913 conn->acl_recombination_length = l2cap_length; 914 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 915 } 916 break; 917 918 } 919 default: 920 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 921 return; 922 } 923 924 // execute main loop 925 hci_run(); 926 } 927 928 static void hci_shutdown_connection(hci_connection_t *conn){ 929 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 930 931 #ifdef ENABLE_CLASSIC 932 #ifdef ENABLE_SCO_OVER_HCI 933 int addr_type = conn->address_type; 934 #endif 935 #endif 936 937 btstack_run_loop_remove_timer(&conn->timeout); 938 939 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 940 btstack_memory_hci_connection_free( conn ); 941 942 // now it's gone 943 hci_emit_nr_connections_changed(); 944 945 #ifdef ENABLE_CLASSIC 946 #ifdef ENABLE_SCO_OVER_HCI 947 // update SCO 948 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 949 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 950 } 951 #endif 952 #endif 953 } 954 955 #ifdef ENABLE_CLASSIC 956 957 static const uint16_t packet_type_sizes[] = { 958 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 959 HCI_ACL_DH1_SIZE, 0, 0, 0, 960 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 961 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 962 }; 963 static const uint8_t packet_type_feature_requirement_bit[] = { 964 0, // 3 slot packets 965 1, // 5 slot packets 966 25, // EDR 2 mpbs 967 26, // EDR 3 mbps 968 39, // 3 slot EDR packts 969 40, // 5 slot EDR packet 970 }; 971 static const uint16_t packet_type_feature_packet_mask[] = { 972 0x0f00, // 3 slot packets 973 0xf000, // 5 slot packets 974 0x1102, // EDR 2 mpbs 975 0x2204, // EDR 3 mbps 976 0x0300, // 3 slot EDR packts 977 0x3000, // 5 slot EDR packet 978 }; 979 980 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 981 // enable packet types based on size 982 uint16_t packet_types = 0; 983 unsigned int i; 984 for (i=0;i<16;i++){ 985 if (packet_type_sizes[i] == 0) continue; 986 if (packet_type_sizes[i] <= buffer_size){ 987 packet_types |= 1 << i; 988 } 989 } 990 // disable packet types due to missing local supported features 991 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 992 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 993 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 994 if (feature_set) continue; 995 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 996 packet_types &= ~packet_type_feature_packet_mask[i]; 997 } 998 // flip bits for "may not be used" 999 packet_types ^= 0x3306; 1000 return packet_types; 1001 } 1002 1003 uint16_t hci_usable_acl_packet_types(void){ 1004 return hci_stack->packet_types; 1005 } 1006 #endif 1007 1008 uint8_t* hci_get_outgoing_packet_buffer(void){ 1009 // hci packet buffer is >= acl data packet length 1010 return hci_stack->hci_packet_buffer; 1011 } 1012 1013 uint16_t hci_max_acl_data_packet_length(void){ 1014 return hci_stack->acl_data_packet_length; 1015 } 1016 1017 #ifdef ENABLE_CLASSIC 1018 int hci_extended_sco_link_supported(void){ 1019 // No. 31, byte 3, bit 7 1020 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1021 } 1022 #endif 1023 1024 int hci_non_flushable_packet_boundary_flag_supported(void){ 1025 // No. 54, byte 6, bit 6 1026 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 1027 } 1028 1029 static int gap_ssp_supported(void){ 1030 // No. 51, byte 6, bit 3 1031 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 1032 } 1033 1034 static int hci_classic_supported(void){ 1035 #ifdef ENABLE_CLASSIC 1036 // No. 37, byte 4, bit 5, = No BR/EDR Support 1037 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1038 #else 1039 return 0; 1040 #endif 1041 } 1042 1043 static int hci_le_supported(void){ 1044 #ifdef ENABLE_BLE 1045 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1046 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1047 #else 1048 return 0; 1049 #endif 1050 } 1051 1052 #ifdef ENABLE_BLE 1053 1054 /** 1055 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1056 */ 1057 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1058 *addr_type = hci_stack->le_own_addr_type; 1059 if (hci_stack->le_own_addr_type){ 1060 memcpy(addr, hci_stack->le_random_address, 6); 1061 } else { 1062 memcpy(addr, hci_stack->local_bd_addr, 6); 1063 } 1064 } 1065 1066 #ifdef ENABLE_LE_CENTRAL 1067 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1068 1069 int offset = 3; 1070 int num_reports = packet[offset]; 1071 offset += 1; 1072 1073 int i; 1074 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1075 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1076 for (i=0; i<num_reports && offset < size;i++){ 1077 // sanity checks on data_length: 1078 uint8_t data_length = packet[offset + 8]; 1079 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1080 if (offset + 9 + data_length + 1 > size) return; 1081 // setup event 1082 uint8_t event_size = 10 + data_length; 1083 int pos = 0; 1084 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1085 event[pos++] = event_size; 1086 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 1087 offset += 8; 1088 pos += 8; 1089 event[pos++] = packet[offset + 1 + data_length]; // rssi 1090 event[pos++] = data_length; 1091 offset++; 1092 memcpy(&event[pos], &packet[offset], data_length); 1093 pos += data_length; 1094 offset += data_length + 1; // rssi 1095 hci_emit_event(event, pos, 1); 1096 } 1097 } 1098 #endif 1099 #endif 1100 1101 #ifdef ENABLE_BLE 1102 #ifdef ENABLE_LE_PERIPHERAL 1103 static void hci_reenable_advertisements_if_needed(void){ 1104 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1105 // get number of active le slave connections 1106 int num_slave_connections = 0; 1107 btstack_linked_list_iterator_t it; 1108 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1109 while (btstack_linked_list_iterator_has_next(&it)){ 1110 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1111 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1112 if (con->state != OPEN) continue; 1113 if (con->role != HCI_ROLE_SLAVE) continue; 1114 if (!hci_is_le_connection(con)) continue; 1115 num_slave_connections++; 1116 } 1117 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1118 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1119 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1120 } 1121 } 1122 } 1123 #endif 1124 #endif 1125 1126 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1127 1128 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1129 if (!hci_stack->config) return 0; 1130 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1131 // Limit baud rate for Broadcom chipsets to 3 mbps 1132 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 1133 baud_rate = 3000000; 1134 } 1135 return baud_rate; 1136 } 1137 1138 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1139 UNUSED(ds); 1140 1141 switch (hci_stack->substate){ 1142 case HCI_INIT_W4_SEND_RESET: 1143 log_info("Resend HCI Reset"); 1144 hci_stack->substate = HCI_INIT_SEND_RESET; 1145 hci_stack->num_cmd_packets = 1; 1146 hci_run(); 1147 break; 1148 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1149 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1150 if (hci_stack->hci_transport->reset_link){ 1151 hci_stack->hci_transport->reset_link(); 1152 } 1153 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1154 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1155 log_info("Resend HCI Reset - CSR Warm Boot"); 1156 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1157 hci_stack->num_cmd_packets = 1; 1158 hci_run(); 1159 break; 1160 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1161 if (hci_stack->hci_transport->set_baudrate){ 1162 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1163 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1164 hci_stack->hci_transport->set_baudrate(baud_rate); 1165 } 1166 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1167 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1168 if (hci_stack->hci_transport->reset_link){ 1169 log_info("Link Reset"); 1170 hci_stack->hci_transport->reset_link(); 1171 } 1172 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1173 hci_run(); 1174 } 1175 break; 1176 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1177 // otherwise continue 1178 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1179 hci_send_cmd(&hci_read_local_supported_commands); 1180 break; 1181 default: 1182 break; 1183 } 1184 } 1185 #endif 1186 1187 static void hci_initializing_next_state(void){ 1188 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1189 } 1190 1191 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_PERIPHERAL) 1192 static void hci_replace_bd_addr_placeholder(uint8_t * data, uint16_t size){ 1193 const int bd_addr_string_len = 17; 1194 int i = 0; 1195 while (i < size - bd_addr_string_len){ 1196 if (memcmp(&data[i], "00:00:00:00:00:00", bd_addr_string_len)) { 1197 i++; 1198 continue; 1199 } 1200 // set real address 1201 memcpy(&data[i], bd_addr_to_str(hci_stack->local_bd_addr), bd_addr_string_len); 1202 i += bd_addr_string_len; 1203 } 1204 } 1205 #endif 1206 1207 // assumption: hci_can_send_command_packet_now() == true 1208 static void hci_initializing_run(void){ 1209 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1210 switch (hci_stack->substate){ 1211 case HCI_INIT_SEND_RESET: 1212 hci_state_reset(); 1213 1214 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1215 // prepare reset if command complete not received in 100ms 1216 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1217 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1218 btstack_run_loop_add_timer(&hci_stack->timeout); 1219 #endif 1220 // send command 1221 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1222 hci_send_cmd(&hci_reset); 1223 break; 1224 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1225 hci_send_cmd(&hci_read_local_version_information); 1226 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1227 break; 1228 case HCI_INIT_SEND_READ_LOCAL_NAME: 1229 hci_send_cmd(&hci_read_local_name); 1230 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1231 break; 1232 1233 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1234 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1235 hci_state_reset(); 1236 // prepare reset if command complete not received in 100ms 1237 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1238 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1239 btstack_run_loop_add_timer(&hci_stack->timeout); 1240 // send command 1241 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1242 hci_send_cmd(&hci_reset); 1243 break; 1244 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1245 hci_state_reset(); 1246 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1247 hci_send_cmd(&hci_reset); 1248 break; 1249 case HCI_INIT_SEND_BAUD_CHANGE: { 1250 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1251 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1252 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1253 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1254 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1255 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1256 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1257 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1258 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1259 btstack_run_loop_add_timer(&hci_stack->timeout); 1260 } 1261 break; 1262 } 1263 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1264 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1265 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1266 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1267 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1268 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1269 break; 1270 } 1271 case HCI_INIT_CUSTOM_INIT: 1272 // Custom initialization 1273 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1274 btstack_chipset_result_t result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1275 int send_cmd = 0; 1276 switch (result){ 1277 case BTSTACK_CHIPSET_VALID_COMMAND: 1278 send_cmd = 1; 1279 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1280 break; 1281 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1282 send_cmd = 1; 1283 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1284 log_info("CSR Warm Boot"); 1285 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1286 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1287 btstack_run_loop_add_timer(&hci_stack->timeout); 1288 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1289 && hci_stack->config 1290 && hci_stack->chipset 1291 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1292 && hci_stack->hci_transport->set_baudrate 1293 && hci_transport_uart_get_main_baud_rate()){ 1294 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1295 } else { 1296 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1297 } 1298 break; 1299 default: 1300 break; 1301 } 1302 1303 if (send_cmd){ 1304 int size = 3 + hci_stack->hci_packet_buffer[2]; 1305 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1306 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1307 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1308 break; 1309 } 1310 log_info("Init script done"); 1311 1312 // Init script download on Broadcom chipsets causes: 1313 if ( (result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1314 ( hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION 1315 || hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA) ){ 1316 1317 // - baud rate to reset, restore UART baud rate if needed 1318 int need_baud_change = hci_stack->config 1319 && hci_stack->chipset 1320 && hci_stack->chipset->set_baudrate_command 1321 && hci_stack->hci_transport->set_baudrate 1322 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1323 if (need_baud_change) { 1324 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1325 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1326 hci_stack->hci_transport->set_baudrate(baud_rate); 1327 } 1328 1329 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1330 // -> Work around: wait a few milliseconds here. 1331 log_info("BCM delay after init script"); 1332 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1333 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1334 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1335 btstack_run_loop_add_timer(&hci_stack->timeout); 1336 break; 1337 } 1338 } 1339 // otherwise continue 1340 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1341 hci_send_cmd(&hci_read_local_supported_commands); 1342 break; 1343 case HCI_INIT_SET_BD_ADDR: 1344 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1345 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1346 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1347 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1348 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1349 break; 1350 #endif 1351 1352 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1353 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1354 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1355 hci_send_cmd(&hci_read_local_supported_commands); 1356 break; 1357 case HCI_INIT_READ_BD_ADDR: 1358 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1359 hci_send_cmd(&hci_read_bd_addr); 1360 break; 1361 case HCI_INIT_READ_BUFFER_SIZE: 1362 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1363 hci_send_cmd(&hci_read_buffer_size); 1364 break; 1365 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1366 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1367 hci_send_cmd(&hci_read_local_supported_features); 1368 break; 1369 1370 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1371 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1372 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1373 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1374 break; 1375 case HCI_INIT_HOST_BUFFER_SIZE: 1376 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1377 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1378 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1379 break; 1380 #endif 1381 1382 case HCI_INIT_SET_EVENT_MASK: 1383 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1384 if (hci_le_supported()){ 1385 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1386 } else { 1387 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1388 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1389 } 1390 break; 1391 1392 #ifdef ENABLE_CLASSIC 1393 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1394 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1395 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1396 break; 1397 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1398 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1399 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1400 break; 1401 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1402 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1403 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1404 break; 1405 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1406 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1407 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1408 break; 1409 case HCI_INIT_WRITE_LOCAL_NAME: { 1410 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1411 hci_reserve_packet_buffer(); 1412 uint8_t * packet = hci_stack->hci_packet_buffer; 1413 // construct HCI Command and send 1414 uint16_t opcode = hci_write_local_name.opcode; 1415 hci_stack->last_cmd_opcode = opcode; 1416 packet[0] = opcode & 0xff; 1417 packet[1] = opcode >> 8; 1418 packet[2] = DEVICE_NAME_LEN; 1419 memset(&packet[3], 0, DEVICE_NAME_LEN); 1420 memcpy(&packet[3], hci_stack->local_name, strlen(hci_stack->local_name)); 1421 // expand '00:00:00:00:00:00' in name with bd_addr 1422 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1423 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1424 break; 1425 } 1426 case HCI_INIT_WRITE_EIR_DATA: { 1427 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1428 hci_reserve_packet_buffer(); 1429 uint8_t * packet = hci_stack->hci_packet_buffer; 1430 // construct HCI Command and send 1431 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1432 hci_stack->last_cmd_opcode = opcode; 1433 packet[0] = opcode & 0xff; 1434 packet[1] = opcode >> 8; 1435 packet[2] = 1 + 240; 1436 packet[3] = 0; // FEC not required 1437 if (hci_stack->eir_data){ 1438 memcpy(&packet[4], hci_stack->eir_data, 240); 1439 } else { 1440 memset(&packet[4], 0, 240); 1441 int name_len = strlen(hci_stack->local_name); 1442 packet[4] = name_len + 1; 1443 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1444 memcpy(&packet[6], hci_stack->local_name, name_len); 1445 } 1446 // expand '00:00:00:00:00:00' in name with bd_addr 1447 hci_replace_bd_addr_placeholder(&packet[4], 240); 1448 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1449 break; 1450 } 1451 case HCI_INIT_WRITE_INQUIRY_MODE: 1452 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1453 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1454 break; 1455 case HCI_INIT_WRITE_SCAN_ENABLE: 1456 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1457 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1458 break; 1459 // only sent if ENABLE_SCO_OVER_HCI is defined 1460 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1461 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1462 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1463 break; 1464 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1465 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1466 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1467 break; 1468 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1469 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1470 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1471 log_info("BCM: Route SCO data via HCI transport"); 1472 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1473 break; 1474 1475 #endif 1476 #ifdef ENABLE_BLE 1477 // LE INIT 1478 case HCI_INIT_LE_READ_BUFFER_SIZE: 1479 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1480 hci_send_cmd(&hci_le_read_buffer_size); 1481 break; 1482 case HCI_INIT_LE_SET_EVENT_MASK: 1483 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1484 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1485 break; 1486 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1487 // LE Supported Host = 1, Simultaneous Host = 0 1488 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1489 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1490 break; 1491 #endif 1492 1493 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1494 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1495 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1496 hci_send_cmd(&hci_le_read_maximum_data_length); 1497 break; 1498 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1499 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1500 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1501 break; 1502 #endif 1503 1504 #ifdef ENABLE_LE_CENTRAL 1505 case HCI_INIT_READ_WHITE_LIST_SIZE: 1506 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1507 hci_send_cmd(&hci_le_read_white_list_size); 1508 break; 1509 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1510 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1511 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1512 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1513 break; 1514 #endif 1515 default: 1516 return; 1517 } 1518 } 1519 1520 static void hci_init_done(void){ 1521 // done. tell the app 1522 log_info("hci_init_done -> HCI_STATE_WORKING"); 1523 hci_stack->state = HCI_STATE_WORKING; 1524 hci_emit_state(); 1525 hci_run(); 1526 } 1527 1528 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1529 1530 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1531 1532 uint8_t command_completed = 0; 1533 1534 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1535 uint16_t opcode = little_endian_read_16(packet,3); 1536 if (opcode == hci_stack->last_cmd_opcode){ 1537 command_completed = 1; 1538 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1539 } else { 1540 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1541 } 1542 } 1543 1544 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1545 uint8_t status = packet[2]; 1546 uint16_t opcode = little_endian_read_16(packet,4); 1547 if (opcode == hci_stack->last_cmd_opcode){ 1548 if (status){ 1549 command_completed = 1; 1550 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1551 } else { 1552 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1553 } 1554 } else { 1555 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1556 } 1557 } 1558 1559 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1560 1561 // Vendor == CSR 1562 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1563 // TODO: track actual command 1564 command_completed = 1; 1565 } 1566 1567 // Vendor == Toshiba 1568 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1569 // TODO: track actual command 1570 command_completed = 1; 1571 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1572 hci_stack->num_cmd_packets = 1; 1573 } 1574 1575 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1576 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1577 // 1578 // HCI Reset 1579 // Timeout 100 ms 1580 // HCI Reset 1581 // Command Complete Reset 1582 // HCI Read Local Version Information 1583 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1584 // hang... 1585 // 1586 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1587 if (!command_completed 1588 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1589 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1590 1591 uint16_t opcode = little_endian_read_16(packet,3); 1592 if (opcode == hci_reset.opcode){ 1593 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1594 return; 1595 } 1596 } 1597 1598 // CSR & H5 1599 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1600 if (!command_completed 1601 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1602 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1603 1604 uint16_t opcode = little_endian_read_16(packet,3); 1605 if (opcode == hci_reset.opcode){ 1606 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1607 return; 1608 } 1609 } 1610 1611 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1612 // fix: Correct substate and behave as command below 1613 if (command_completed){ 1614 switch (hci_stack->substate){ 1615 case HCI_INIT_SEND_RESET: 1616 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1617 break; 1618 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1619 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1620 break; 1621 default: 1622 break; 1623 } 1624 } 1625 1626 #endif 1627 1628 if (!command_completed) return; 1629 1630 int need_baud_change = 0; 1631 int need_addr_change = 0; 1632 1633 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1634 need_baud_change = hci_stack->config 1635 && hci_stack->chipset 1636 && hci_stack->chipset->set_baudrate_command 1637 && hci_stack->hci_transport->set_baudrate 1638 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1639 1640 need_addr_change = hci_stack->custom_bd_addr_set 1641 && hci_stack->chipset 1642 && hci_stack->chipset->set_bd_addr_command; 1643 #endif 1644 1645 switch(hci_stack->substate){ 1646 1647 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1648 case HCI_INIT_SEND_RESET: 1649 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1650 // fix: just correct substate and behave as command below 1651 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1652 btstack_run_loop_remove_timer(&hci_stack->timeout); 1653 break; 1654 case HCI_INIT_W4_SEND_RESET: 1655 btstack_run_loop_remove_timer(&hci_stack->timeout); 1656 break; 1657 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1658 log_info("Received local name, need baud change %d", need_baud_change); 1659 if (need_baud_change){ 1660 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1661 return; 1662 } 1663 // skip baud change 1664 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1665 return; 1666 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1667 // for STLC2500D, baud rate change already happened. 1668 // for others, baud rate gets changed now 1669 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1670 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1671 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1672 hci_stack->hci_transport->set_baudrate(baud_rate); 1673 } 1674 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1675 return; 1676 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1677 btstack_run_loop_remove_timer(&hci_stack->timeout); 1678 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1679 return; 1680 case HCI_INIT_W4_CUSTOM_INIT: 1681 // repeat custom init 1682 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1683 return; 1684 #else 1685 case HCI_INIT_W4_SEND_RESET: 1686 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1687 return ; 1688 #endif 1689 1690 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1691 if (need_baud_change && 1692 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1693 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1694 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1695 return; 1696 } 1697 if (need_addr_change){ 1698 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1699 return; 1700 } 1701 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1702 return; 1703 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1704 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1705 if (need_baud_change){ 1706 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1707 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1708 hci_stack->hci_transport->set_baudrate(baud_rate); 1709 } 1710 if (need_addr_change){ 1711 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1712 return; 1713 } 1714 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1715 return; 1716 case HCI_INIT_W4_SET_BD_ADDR: 1717 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1718 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1719 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1720 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1721 return; 1722 } 1723 // skipping st warm boot 1724 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1725 return; 1726 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1727 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1728 return; 1729 #endif 1730 case HCI_INIT_W4_READ_BD_ADDR: 1731 // only read buffer size if supported 1732 if (hci_stack->local_supported_commands[0] & 0x01) { 1733 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1734 return; 1735 } 1736 // skipping read buffer size 1737 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1738 return; 1739 case HCI_INIT_W4_SET_EVENT_MASK: 1740 // skip Classic init commands for LE only chipsets 1741 if (!hci_classic_supported()){ 1742 #ifdef ENABLE_BLE 1743 if (hci_le_supported()){ 1744 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1745 return; 1746 } 1747 #endif 1748 log_error("Neither BR/EDR nor LE supported"); 1749 hci_init_done(); 1750 return; 1751 } 1752 if (!gap_ssp_supported()){ 1753 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1754 return; 1755 } 1756 break; 1757 #ifdef ENABLE_BLE 1758 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1759 // skip write le host if not supported (e.g. on LE only EM9301) 1760 if (hci_stack->local_supported_commands[0] & 0x02) break; 1761 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1762 return; 1763 1764 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1765 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1766 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1767 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1768 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1769 return; 1770 } 1771 // explicit fall through to reduce repetitions 1772 1773 #ifdef ENABLE_LE_CENTRAL 1774 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1775 #else 1776 hci_init_done(); 1777 #endif 1778 return; 1779 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1780 1781 #endif /* ENABLE_BLE */ 1782 1783 #ifdef ENABLE_SCO_OVER_HCI 1784 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1785 // skip write synchronous flow control if not supported 1786 if (hci_stack->local_supported_commands[0] & 0x04) break; 1787 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1788 // explicit fall through to reduce repetitions 1789 1790 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1791 // skip write default erroneous data reporting if not supported 1792 if (hci_stack->local_supported_commands[0] & 0x08) break; 1793 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1794 // explicit fall through to reduce repetitions 1795 1796 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1797 // skip bcm set sco pcm config on non-Broadcom chipsets 1798 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1799 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1800 // explicit fall through to reduce repetitions 1801 1802 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1803 if (!hci_le_supported()){ 1804 // SKIP LE init for Classic only configuration 1805 hci_init_done(); 1806 return; 1807 } 1808 break; 1809 1810 #else /* !ENABLE_SCO_OVER_HCI */ 1811 1812 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1813 #ifdef ENABLE_BLE 1814 if (hci_le_supported()){ 1815 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1816 return; 1817 } 1818 #endif 1819 // SKIP LE init for Classic only configuration 1820 hci_init_done(); 1821 return; 1822 #endif /* ENABLE_SCO_OVER_HCI */ 1823 1824 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1825 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1826 // Response to command before init done state -> init done 1827 case (HCI_INIT_DONE-1): 1828 hci_init_done(); 1829 return; 1830 #endif 1831 1832 default: 1833 break; 1834 } 1835 hci_initializing_next_state(); 1836 } 1837 1838 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1839 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1840 bd_addr_t bd_address; 1841 memcpy(&bd_address, conn->address, 6); 1842 1843 #ifdef ENABLE_CLASSIC 1844 // cache needed data 1845 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1846 #endif 1847 1848 // connection failed, remove entry 1849 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1850 btstack_memory_hci_connection_free( conn ); 1851 1852 #ifdef ENABLE_CLASSIC 1853 // notify client if dedicated bonding 1854 if (notify_dedicated_bonding_failed){ 1855 log_info("hci notify_dedicated_bonding_failed"); 1856 hci_emit_dedicated_bonding_result(bd_address, status); 1857 } 1858 1859 // if authentication error, also delete link key 1860 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1861 gap_drop_link_key_for_bd_addr(bd_address); 1862 } 1863 #endif 1864 } 1865 1866 static void event_handler(uint8_t *packet, int size){ 1867 1868 uint16_t event_length = packet[1]; 1869 1870 // assert packet is complete 1871 if (size != event_length + 2){ 1872 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1873 return; 1874 } 1875 1876 bd_addr_t addr; 1877 bd_addr_type_t addr_type; 1878 hci_con_handle_t handle; 1879 hci_connection_t * conn; 1880 int i; 1881 int create_connection_cmd; 1882 1883 #ifdef ENABLE_CLASSIC 1884 uint8_t link_type; 1885 #endif 1886 1887 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1888 1889 switch (hci_event_packet_get_type(packet)) { 1890 1891 case HCI_EVENT_COMMAND_COMPLETE: 1892 // get num cmd packets - limit to 1 to reduce complexity 1893 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1894 1895 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1896 if (packet[5]) break; 1897 // terminate, name 248 chars 1898 packet[6+248] = 0; 1899 log_info("local name: %s", &packet[6]); 1900 } 1901 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1902 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1903 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1904 uint16_t acl_len = little_endian_read_16(packet, 6); 1905 uint16_t sco_len = packet[8]; 1906 1907 // determine usable ACL/SCO payload size 1908 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1909 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1910 1911 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1912 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1913 1914 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1915 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1916 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1917 } 1918 } 1919 #ifdef ENABLE_BLE 1920 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1921 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1922 hci_stack->le_acl_packets_total_num = packet[8]; 1923 // determine usable ACL payload size 1924 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1925 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1926 } 1927 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1928 } 1929 #endif 1930 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1931 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1932 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1933 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1934 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); 1935 } 1936 #endif 1937 #ifdef ENABLE_LE_CENTRAL 1938 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1939 hci_stack->le_whitelist_capacity = packet[6]; 1940 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1941 } 1942 #endif 1943 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1944 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1945 hci_stack->local_bd_addr); 1946 log_info("Local Address, Status: 0x%02x: Addr: %s", 1947 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1948 #ifdef ENABLE_CLASSIC 1949 if (hci_stack->link_key_db){ 1950 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1951 } 1952 #endif 1953 } 1954 #ifdef ENABLE_CLASSIC 1955 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1956 hci_emit_discoverable_enabled(hci_stack->discoverable); 1957 } 1958 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1959 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1960 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1961 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1962 hci_emit_event(event, sizeof(event), 1); 1963 } 1964 } 1965 #endif 1966 1967 // Note: HCI init checks 1968 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1969 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1970 1971 #ifdef ENABLE_CLASSIC 1972 // determine usable ACL packet types based on host buffer size and supported features 1973 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1974 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1975 #endif 1976 // Classic/LE 1977 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1978 } 1979 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1980 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1981 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1982 uint16_t manufacturer = little_endian_read_16(packet, 10); 1983 // map Cypress to Broadcom 1984 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 1985 log_info("Treat Cypress as Broadcom"); 1986 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 1987 little_endian_store_16(packet, 10, manufacturer); 1988 } 1989 hci_stack->manufacturer = manufacturer; 1990 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1991 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1992 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1993 } 1994 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1995 hci_stack->local_supported_commands[0] = 1996 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 / Read Buffer Size 1997 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 1998 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 1999 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2000 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2001 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2 | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2002 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1; // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2003 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 2004 } 2005 #ifdef ENABLE_CLASSIC 2006 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 2007 if (packet[5] == 0){ 2008 hci_stack->synchronous_flow_control_enabled = 1; 2009 } 2010 } 2011 #endif 2012 break; 2013 2014 case HCI_EVENT_COMMAND_STATUS: 2015 // get num cmd packets - limit to 1 to reduce complexity 2016 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2017 2018 // check command status to detected failed outgoing connections 2019 create_connection_cmd = 0; 2020 #ifdef ENABLE_CLASSIC 2021 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2022 create_connection_cmd = 1; 2023 } 2024 #endif 2025 #ifdef ENABLE_LE_CENTRAL 2026 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2027 create_connection_cmd = 1; 2028 } 2029 #endif 2030 if (create_connection_cmd) { 2031 uint8_t status = hci_event_command_status_get_status(packet); 2032 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2033 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); 2034 2035 // reset outgoing address info 2036 memset(hci_stack->outgoing_addr, 0, 6); 2037 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2038 2039 // error => outgoing connection failed 2040 if ((conn != NULL) && (status != 0)){ 2041 hci_handle_connection_failed(conn, status); 2042 } 2043 } 2044 break; 2045 2046 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2047 int offset = 3; 2048 for (i=0; i<packet[2];i++){ 2049 handle = little_endian_read_16(packet, offset) & 0x0fff; 2050 offset += 2; 2051 uint16_t num_packets = little_endian_read_16(packet, offset); 2052 offset += 2; 2053 2054 conn = hci_connection_for_handle(handle); 2055 if (!conn){ 2056 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2057 continue; 2058 } 2059 2060 if (conn->num_packets_sent >= num_packets){ 2061 conn->num_packets_sent -= num_packets; 2062 } else { 2063 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2064 conn->num_packets_sent = 0; 2065 } 2066 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2067 2068 #ifdef ENABLE_CLASSIC 2069 // For SCO, we do the can_send_now_check here 2070 hci_notify_if_sco_can_send_now(); 2071 #endif 2072 } 2073 break; 2074 } 2075 2076 #ifdef ENABLE_CLASSIC 2077 case HCI_EVENT_INQUIRY_COMPLETE: 2078 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2079 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2080 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2081 hci_emit_event(event, sizeof(event), 1); 2082 } 2083 break; 2084 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2085 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2086 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2087 } 2088 break; 2089 case HCI_EVENT_CONNECTION_REQUEST: 2090 reverse_bd_addr(&packet[2], addr); 2091 // TODO: eval COD 8-10 2092 link_type = packet[11]; 2093 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2094 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 2095 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2096 if (!conn) { 2097 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2098 } 2099 if (!conn) { 2100 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2101 hci_stack->decline_reason = 0x0d; 2102 bd_addr_copy(hci_stack->decline_addr, addr); 2103 break; 2104 } 2105 conn->role = HCI_ROLE_SLAVE; 2106 conn->state = RECEIVED_CONNECTION_REQUEST; 2107 // store info about eSCO 2108 if (link_type == 0x02){ 2109 conn->remote_supported_feature_eSCO = 1; 2110 } 2111 hci_run(); 2112 break; 2113 2114 case HCI_EVENT_CONNECTION_COMPLETE: 2115 // Connection management 2116 reverse_bd_addr(&packet[5], addr); 2117 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2118 addr_type = BD_ADDR_TYPE_CLASSIC; 2119 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2120 if (conn) { 2121 if (!packet[2]){ 2122 conn->state = OPEN; 2123 conn->con_handle = little_endian_read_16(packet, 3); 2124 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2125 2126 // restart timer 2127 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2128 btstack_run_loop_add_timer(&conn->timeout); 2129 2130 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2131 2132 hci_emit_nr_connections_changed(); 2133 } else { 2134 // connection failed 2135 hci_handle_connection_failed(conn, packet[2]); 2136 } 2137 } 2138 break; 2139 2140 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2141 reverse_bd_addr(&packet[5], addr); 2142 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2143 if (packet[2]){ 2144 // connection failed 2145 break; 2146 } 2147 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2148 if (!conn) { 2149 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2150 } 2151 if (!conn) { 2152 break; 2153 } 2154 conn->state = OPEN; 2155 conn->con_handle = little_endian_read_16(packet, 3); 2156 2157 #ifdef ENABLE_SCO_OVER_HCI 2158 // update SCO 2159 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2160 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2161 } 2162 // trigger can send now 2163 if (hci_have_usb_transport()){ 2164 hci_stack->sco_can_send_now = 1; 2165 } 2166 #endif 2167 break; 2168 2169 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2170 handle = little_endian_read_16(packet, 3); 2171 conn = hci_connection_for_handle(handle); 2172 if (!conn) break; 2173 if (!packet[2]){ 2174 uint8_t * features = &packet[5]; 2175 if (features[6] & (1 << 3)){ 2176 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2177 } 2178 if (features[3] & (1<<7)){ 2179 conn->remote_supported_feature_eSCO = 1; 2180 } 2181 } 2182 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2183 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2184 if (conn->bonding_flags & BONDING_DEDICATED){ 2185 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2186 } 2187 break; 2188 2189 case HCI_EVENT_LINK_KEY_REQUEST: 2190 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2191 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2192 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2193 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2194 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2195 hci_run(); 2196 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2197 return; 2198 2199 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2200 reverse_bd_addr(&packet[2], addr); 2201 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2202 if (!conn) break; 2203 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2204 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2205 // Change Connection Encryption keeps link key type 2206 if (link_key_type != CHANGED_COMBINATION_KEY){ 2207 conn->link_key_type = link_key_type; 2208 } 2209 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2210 // still forward event to allow dismiss of pairing dialog 2211 break; 2212 } 2213 2214 case HCI_EVENT_PIN_CODE_REQUEST: 2215 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2216 // non-bondable mode: pin code negative reply will be sent 2217 if (!hci_stack->bondable){ 2218 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2219 hci_run(); 2220 return; 2221 } 2222 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2223 if (!hci_stack->link_key_db) break; 2224 hci_event_pin_code_request_get_bd_addr(packet, addr); 2225 hci_stack->link_key_db->delete_link_key(addr); 2226 break; 2227 2228 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2229 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2230 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2231 break; 2232 2233 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2234 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2235 if (!hci_stack->ssp_auto_accept) break; 2236 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2237 break; 2238 2239 case HCI_EVENT_USER_PASSKEY_REQUEST: 2240 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2241 if (!hci_stack->ssp_auto_accept) break; 2242 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2243 break; 2244 case HCI_EVENT_MODE_CHANGE: 2245 handle = hci_event_mode_change_get_handle(packet); 2246 conn = hci_connection_for_handle(handle); 2247 if (!conn) break; 2248 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2249 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2250 break; 2251 #endif 2252 2253 case HCI_EVENT_ENCRYPTION_CHANGE: 2254 handle = little_endian_read_16(packet, 3); 2255 conn = hci_connection_for_handle(handle); 2256 if (!conn) break; 2257 if (packet[2] == 0) { 2258 if (packet[5]){ 2259 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2260 } else { 2261 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2262 } 2263 } 2264 #ifdef ENABLE_CLASSIC 2265 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2266 #endif 2267 break; 2268 2269 #ifdef ENABLE_CLASSIC 2270 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2271 handle = little_endian_read_16(packet, 3); 2272 conn = hci_connection_for_handle(handle); 2273 if (!conn) break; 2274 2275 // dedicated bonding: send result and disconnect 2276 if (conn->bonding_flags & BONDING_DEDICATED){ 2277 conn->bonding_flags &= ~BONDING_DEDICATED; 2278 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2279 conn->bonding_status = packet[2]; 2280 break; 2281 } 2282 2283 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2284 // link key sufficient for requested security 2285 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2286 break; 2287 } 2288 // not enough 2289 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2290 break; 2291 #endif 2292 2293 // HCI_EVENT_DISCONNECTION_COMPLETE 2294 // has been split, to first notify stack before shutting connection down 2295 // see end of function, too. 2296 case HCI_EVENT_DISCONNECTION_COMPLETE: 2297 if (packet[2]) break; // status != 0 2298 handle = little_endian_read_16(packet, 3); 2299 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2300 if (hci_stack->acl_fragmentation_total_size > 0) { 2301 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2302 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2303 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2304 hci_stack->acl_fragmentation_total_size = 0; 2305 hci_stack->acl_fragmentation_pos = 0; 2306 if (release_buffer){ 2307 hci_release_packet_buffer(); 2308 } 2309 } 2310 } 2311 2312 // re-enable advertisements for le connections if active 2313 conn = hci_connection_for_handle(handle); 2314 if (!conn) break; 2315 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2316 #ifdef ENABLE_BLE 2317 #ifdef ENABLE_LE_PERIPHERAL 2318 if (hci_is_le_connection(conn)){ 2319 hci_reenable_advertisements_if_needed(); 2320 } 2321 #endif 2322 #endif 2323 break; 2324 2325 case HCI_EVENT_HARDWARE_ERROR: 2326 log_error("Hardware Error: 0x%02x", packet[2]); 2327 if (hci_stack->hardware_error_callback){ 2328 (*hci_stack->hardware_error_callback)(packet[2]); 2329 } else { 2330 // if no special requests, just reboot stack 2331 hci_power_control_off(); 2332 hci_power_control_on(); 2333 } 2334 break; 2335 2336 #ifdef ENABLE_CLASSIC 2337 case HCI_EVENT_ROLE_CHANGE: 2338 if (packet[2]) break; // status != 0 2339 reverse_bd_addr(&packet[3], addr); 2340 addr_type = BD_ADDR_TYPE_CLASSIC; 2341 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2342 if (!conn) break; 2343 conn->role = packet[9]; 2344 break; 2345 #endif 2346 2347 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2348 // release packet buffer only for asynchronous transport and if there are not further fragements 2349 if (hci_transport_synchronous()) { 2350 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2351 return; // instead of break: to avoid re-entering hci_run() 2352 } 2353 hci_stack->acl_fragmentation_tx_active = 0; 2354 if (hci_stack->acl_fragmentation_total_size) break; 2355 hci_release_packet_buffer(); 2356 2357 // L2CAP receives this event via the hci_emit_event below 2358 2359 #ifdef ENABLE_CLASSIC 2360 // For SCO, we do the can_send_now_check here 2361 hci_notify_if_sco_can_send_now(); 2362 #endif 2363 break; 2364 2365 #ifdef ENABLE_CLASSIC 2366 case HCI_EVENT_SCO_CAN_SEND_NOW: 2367 // For SCO, we do the can_send_now_check here 2368 hci_stack->sco_can_send_now = 1; 2369 hci_notify_if_sco_can_send_now(); 2370 return; 2371 2372 // explode inquriy results for easier consumption 2373 case HCI_EVENT_INQUIRY_RESULT: 2374 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2375 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2376 gap_inquiry_explode(packet); 2377 break; 2378 #endif 2379 2380 #ifdef ENABLE_BLE 2381 case HCI_EVENT_LE_META: 2382 switch (packet[2]){ 2383 #ifdef ENABLE_LE_CENTRAL 2384 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2385 // log_info("advertising report received"); 2386 if (!hci_stack->le_scanning_enabled) break; 2387 le_handle_advertisement_report(packet, size); 2388 break; 2389 #endif 2390 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2391 // Connection management 2392 reverse_bd_addr(&packet[8], addr); 2393 addr_type = (bd_addr_type_t)packet[7]; 2394 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2395 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2396 2397 #ifdef ENABLE_LE_CENTRAL 2398 // if auto-connect, remove from whitelist in both roles 2399 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2400 hci_remove_from_whitelist(addr_type, addr); 2401 } 2402 // handle error: error is reported only to the initiator -> outgoing connection 2403 if (packet[3]){ 2404 2405 // handle cancelled outgoing connection 2406 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2407 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2408 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2409 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2410 conn = gap_get_outgoing_connection(); 2411 } 2412 2413 // outgoing connection establishment is done 2414 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2415 // remove entry 2416 if (conn){ 2417 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2418 btstack_memory_hci_connection_free( conn ); 2419 } 2420 break; 2421 } 2422 #endif 2423 // on success, both hosts receive connection complete event 2424 if (packet[6] == HCI_ROLE_MASTER){ 2425 #ifdef ENABLE_LE_CENTRAL 2426 // if we're master, it was an outgoing connection and we're done with it 2427 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2428 #endif 2429 } else { 2430 #ifdef ENABLE_LE_PERIPHERAL 2431 // if we're slave, it was an incoming connection, advertisements have stopped 2432 hci_stack->le_advertisements_active = 0; 2433 #endif 2434 } 2435 // LE connections are auto-accepted, so just create a connection if there isn't one already 2436 if (!conn){ 2437 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2438 } 2439 // no memory, sorry. 2440 if (!conn){ 2441 break; 2442 } 2443 2444 conn->state = OPEN; 2445 conn->role = packet[6]; 2446 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2447 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2448 2449 #ifdef ENABLE_LE_PERIPHERAL 2450 if (packet[6] == HCI_ROLE_SLAVE){ 2451 hci_reenable_advertisements_if_needed(); 2452 } 2453 #endif 2454 2455 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2456 2457 // restart timer 2458 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2459 // btstack_run_loop_add_timer(&conn->timeout); 2460 2461 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2462 2463 hci_emit_nr_connections_changed(); 2464 break; 2465 2466 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2467 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2468 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2469 conn = hci_connection_for_handle(handle); 2470 if (!conn) break; 2471 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2472 break; 2473 2474 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2475 // connection 2476 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2477 conn = hci_connection_for_handle(handle); 2478 if (conn) { 2479 // read arguments 2480 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2481 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2482 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2483 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2484 2485 // validate against current connection parameter range 2486 le_connection_parameter_range_t existing_range; 2487 gap_get_connection_parameter_range(&existing_range); 2488 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2489 if (update_parameter){ 2490 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2491 conn->le_conn_interval_min = le_conn_interval_min; 2492 conn->le_conn_interval_max = le_conn_interval_max; 2493 conn->le_conn_latency = le_conn_latency; 2494 conn->le_supervision_timeout = le_supervision_timeout; 2495 } else { 2496 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2497 } 2498 } 2499 break; 2500 default: 2501 break; 2502 } 2503 break; 2504 #endif 2505 case HCI_EVENT_VENDOR_SPECIFIC: 2506 // Vendor specific commands often create vendor specific event instead of num completed packets 2507 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2508 switch (hci_stack->manufacturer){ 2509 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2510 hci_stack->num_cmd_packets = 1; 2511 break; 2512 default: 2513 break; 2514 } 2515 break; 2516 default: 2517 break; 2518 } 2519 2520 // handle BT initialization 2521 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2522 hci_initializing_event_handler(packet, size); 2523 } 2524 2525 // help with BT sleep 2526 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2527 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2528 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2529 hci_initializing_next_state(); 2530 } 2531 2532 // notify upper stack 2533 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2534 2535 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2536 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2537 if (!packet[2]){ 2538 handle = little_endian_read_16(packet, 3); 2539 hci_connection_t * aConn = hci_connection_for_handle(handle); 2540 if (aConn) { 2541 uint8_t status = aConn->bonding_status; 2542 uint16_t flags = aConn->bonding_flags; 2543 bd_addr_t bd_address; 2544 memcpy(&bd_address, aConn->address, 6); 2545 hci_shutdown_connection(aConn); 2546 // connection struct is gone, don't access anymore 2547 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2548 hci_emit_dedicated_bonding_result(bd_address, status); 2549 } 2550 } 2551 } 2552 } 2553 2554 // execute main loop 2555 hci_run(); 2556 } 2557 2558 #ifdef ENABLE_CLASSIC 2559 2560 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2561 static void sco_schedule_tx(hci_connection_t * conn); 2562 2563 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2564 log_debug("SCO TX Timeout"); 2565 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2566 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2567 if (!conn) return; 2568 2569 // trigger send 2570 conn->sco_tx_ready = 1; 2571 // extra packet if CVSD but SCO buffer is too short 2572 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && hci_stack->sco_data_packet_length < 123){ 2573 conn->sco_tx_ready++; 2574 } 2575 hci_notify_if_sco_can_send_now(); 2576 } 2577 2578 2579 #define SCO_TX_AFTER_RX_MS (6) 2580 2581 static void sco_schedule_tx(hci_connection_t * conn){ 2582 2583 uint32_t now = btstack_run_loop_get_time_ms(); 2584 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2585 int time_delta_ms = sco_tx_ms - now; 2586 2587 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2588 2589 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2590 btstack_run_loop_set_timer(timer, time_delta_ms); 2591 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2592 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2593 btstack_run_loop_add_timer(timer); 2594 } 2595 2596 static void sco_handler(uint8_t * packet, uint16_t size){ 2597 // lookup connection struct 2598 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2599 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2600 if (!conn) return; 2601 2602 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2603 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2604 if (size == 83 && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2605 packet[2] = 0x3c; 2606 memmove(&packet[3], &packet[23], 63); 2607 size = 63; 2608 } 2609 } 2610 2611 if (hci_have_usb_transport()){ 2612 // Nothing to do 2613 } else { 2614 // log_debug("sco flow %u, handle 0x%04x, packets sent %u, bytes send %u", hci_stack->synchronous_flow_control_enabled, (int) con_handle, conn->num_packets_sent, conn->num_sco_bytes_sent); 2615 if (hci_stack->synchronous_flow_control_enabled == 0){ 2616 uint32_t now = btstack_run_loop_get_time_ms(); 2617 2618 if (!conn->sco_rx_valid){ 2619 // ignore first 10 packets 2620 conn->sco_rx_count++; 2621 // log_debug("sco rx count %u", conn->sco_rx_count); 2622 if (conn->sco_rx_count == 10) { 2623 // use first timestamp as is and pretent it just started 2624 conn->sco_rx_ms = now; 2625 conn->sco_rx_valid = 1; 2626 conn->sco_rx_count = 0; 2627 sco_schedule_tx(conn); 2628 } 2629 } else { 2630 // track expected arrival timme 2631 conn->sco_rx_count++; 2632 conn->sco_rx_ms += 7; 2633 int delta = (int32_t) (now - conn->sco_rx_ms); 2634 if (delta > 0){ 2635 conn->sco_rx_ms++; 2636 } 2637 // log_debug("sco rx %u", conn->sco_rx_ms); 2638 sco_schedule_tx(conn); 2639 } 2640 } 2641 } 2642 // deliver to app 2643 if (hci_stack->sco_packet_handler) { 2644 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2645 } 2646 2647 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2648 conn->num_packets_completed++; 2649 hci_stack->host_completed_packets = 1; 2650 hci_run(); 2651 #endif 2652 } 2653 #endif 2654 2655 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2656 hci_dump_packet(packet_type, 1, packet, size); 2657 switch (packet_type) { 2658 case HCI_EVENT_PACKET: 2659 event_handler(packet, size); 2660 break; 2661 case HCI_ACL_DATA_PACKET: 2662 acl_handler(packet, size); 2663 break; 2664 #ifdef ENABLE_CLASSIC 2665 case HCI_SCO_DATA_PACKET: 2666 sco_handler(packet, size); 2667 break; 2668 #endif 2669 default: 2670 break; 2671 } 2672 } 2673 2674 /** 2675 * @brief Add event packet handler. 2676 */ 2677 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2678 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2679 } 2680 2681 2682 /** Register HCI packet handlers */ 2683 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2684 hci_stack->acl_packet_handler = handler; 2685 } 2686 2687 #ifdef ENABLE_CLASSIC 2688 /** 2689 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2690 */ 2691 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2692 hci_stack->sco_packet_handler = handler; 2693 } 2694 #endif 2695 2696 static void hci_state_reset(void){ 2697 // no connections yet 2698 hci_stack->connections = NULL; 2699 2700 // keep discoverable/connectable as this has been requested by the client(s) 2701 // hci_stack->discoverable = 0; 2702 // hci_stack->connectable = 0; 2703 // hci_stack->bondable = 1; 2704 // hci_stack->own_addr_type = 0; 2705 2706 // buffer is free 2707 hci_stack->hci_packet_buffer_reserved = 0; 2708 2709 // no pending cmds 2710 hci_stack->decline_reason = 0; 2711 hci_stack->new_scan_enable_value = 0xff; 2712 2713 // LE 2714 #ifdef ENABLE_BLE 2715 memset(hci_stack->le_random_address, 0, 6); 2716 hci_stack->le_random_address_set = 0; 2717 #endif 2718 #ifdef ENABLE_LE_CENTRAL 2719 hci_stack->le_scanning_active = 0; 2720 hci_stack->le_scan_type = 0xff; 2721 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2722 hci_stack->le_whitelist = 0; 2723 hci_stack->le_whitelist_capacity = 0; 2724 #endif 2725 } 2726 2727 #ifdef ENABLE_CLASSIC 2728 /** 2729 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2730 */ 2731 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2732 // store and open remote device db 2733 hci_stack->link_key_db = link_key_db; 2734 if (hci_stack->link_key_db) { 2735 hci_stack->link_key_db->open(); 2736 } 2737 } 2738 #endif 2739 2740 void hci_init(const hci_transport_t *transport, const void *config){ 2741 2742 #ifdef HAVE_MALLOC 2743 if (!hci_stack) { 2744 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2745 } 2746 #else 2747 hci_stack = &hci_stack_static; 2748 #endif 2749 memset(hci_stack, 0, sizeof(hci_stack_t)); 2750 2751 // reference to use transport layer implementation 2752 hci_stack->hci_transport = transport; 2753 2754 // reference to used config 2755 hci_stack->config = config; 2756 2757 // setup pointer for outgoing packet buffer 2758 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2759 2760 // max acl payload size defined in config.h 2761 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2762 2763 // register packet handlers with transport 2764 transport->register_packet_handler(&packet_handler); 2765 2766 hci_stack->state = HCI_STATE_OFF; 2767 2768 // class of device 2769 hci_stack->class_of_device = 0x007a020c; // Smartphone 2770 2771 // bondable by default 2772 hci_stack->bondable = 1; 2773 2774 #ifdef ENABLE_CLASSIC 2775 // classic name 2776 hci_stack->local_name = default_classic_name; 2777 2778 // Master slave policy 2779 hci_stack->master_slave_policy = 1; 2780 #endif 2781 2782 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2783 hci_stack->ssp_enable = 1; 2784 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2785 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2786 hci_stack->ssp_auto_accept = 1; 2787 2788 // voice setting - signed 16 bit pcm data with CVSD over the air 2789 hci_stack->sco_voice_setting = 0x60; 2790 2791 #ifdef ENABLE_LE_CENTRAL 2792 // connection parameter to use for outgoing connections 2793 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2794 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2795 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2796 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2797 hci_stack->le_connection_latency = 4; // 4 2798 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2799 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2800 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2801 #endif 2802 2803 #ifdef ENABLE_LE_PERIPHERAL 2804 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2805 #endif 2806 2807 // connection parameter range used to answer connection parameter update requests in l2cap 2808 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2809 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2810 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2811 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2812 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2813 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2814 2815 hci_state_reset(); 2816 } 2817 2818 /** 2819 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2820 */ 2821 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2822 hci_stack->chipset = chipset_driver; 2823 2824 // reset chipset driver - init is also called on power_up 2825 if (hci_stack->chipset && hci_stack->chipset->init){ 2826 hci_stack->chipset->init(hci_stack->config); 2827 } 2828 } 2829 2830 /** 2831 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2832 */ 2833 void hci_set_control(const btstack_control_t *hardware_control){ 2834 // references to used control implementation 2835 hci_stack->control = hardware_control; 2836 // init with transport config 2837 hardware_control->init(hci_stack->config); 2838 } 2839 2840 void hci_close(void){ 2841 // close remote device db 2842 if (hci_stack->link_key_db) { 2843 hci_stack->link_key_db->close(); 2844 } 2845 2846 btstack_linked_list_iterator_t lit; 2847 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2848 while (btstack_linked_list_iterator_has_next(&lit)){ 2849 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2850 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2851 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2852 hci_shutdown_connection(connection); 2853 } 2854 2855 hci_power_control(HCI_POWER_OFF); 2856 2857 #ifdef HAVE_MALLOC 2858 free(hci_stack); 2859 #endif 2860 hci_stack = NULL; 2861 } 2862 2863 #ifdef ENABLE_CLASSIC 2864 void gap_set_class_of_device(uint32_t class_of_device){ 2865 hci_stack->class_of_device = class_of_device; 2866 } 2867 2868 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 2869 hci_stack->default_link_policy_settings = default_link_policy_settings; 2870 } 2871 2872 void hci_disable_l2cap_timeout_check(void){ 2873 disable_l2cap_timeouts = 1; 2874 } 2875 #endif 2876 2877 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2878 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2879 void hci_set_bd_addr(bd_addr_t addr){ 2880 memcpy(hci_stack->custom_bd_addr, addr, 6); 2881 hci_stack->custom_bd_addr_set = 1; 2882 } 2883 #endif 2884 2885 // State-Module-Driver overview 2886 // state module low-level 2887 // HCI_STATE_OFF off close 2888 // HCI_STATE_INITIALIZING, on open 2889 // HCI_STATE_WORKING, on open 2890 // HCI_STATE_HALTING, on open 2891 // HCI_STATE_SLEEPING, off/sleep close 2892 // HCI_STATE_FALLING_ASLEEP on open 2893 2894 static int hci_power_control_on(void){ 2895 2896 // power on 2897 int err = 0; 2898 if (hci_stack->control && hci_stack->control->on){ 2899 err = (*hci_stack->control->on)(); 2900 } 2901 if (err){ 2902 log_error( "POWER_ON failed"); 2903 hci_emit_hci_open_failed(); 2904 return err; 2905 } 2906 2907 // int chipset driver 2908 if (hci_stack->chipset && hci_stack->chipset->init){ 2909 hci_stack->chipset->init(hci_stack->config); 2910 } 2911 2912 // init transport 2913 if (hci_stack->hci_transport->init){ 2914 hci_stack->hci_transport->init(hci_stack->config); 2915 } 2916 2917 // open transport 2918 err = hci_stack->hci_transport->open(); 2919 if (err){ 2920 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2921 if (hci_stack->control && hci_stack->control->off){ 2922 (*hci_stack->control->off)(); 2923 } 2924 hci_emit_hci_open_failed(); 2925 return err; 2926 } 2927 return 0; 2928 } 2929 2930 static void hci_power_control_off(void){ 2931 2932 log_info("hci_power_control_off"); 2933 2934 // close low-level device 2935 hci_stack->hci_transport->close(); 2936 2937 log_info("hci_power_control_off - hci_transport closed"); 2938 2939 // power off 2940 if (hci_stack->control && hci_stack->control->off){ 2941 (*hci_stack->control->off)(); 2942 } 2943 2944 log_info("hci_power_control_off - control closed"); 2945 2946 hci_stack->state = HCI_STATE_OFF; 2947 } 2948 2949 static void hci_power_control_sleep(void){ 2950 2951 log_info("hci_power_control_sleep"); 2952 2953 #if 0 2954 // don't close serial port during sleep 2955 2956 // close low-level device 2957 hci_stack->hci_transport->close(hci_stack->config); 2958 #endif 2959 2960 // sleep mode 2961 if (hci_stack->control && hci_stack->control->sleep){ 2962 (*hci_stack->control->sleep)(); 2963 } 2964 2965 hci_stack->state = HCI_STATE_SLEEPING; 2966 } 2967 2968 static int hci_power_control_wake(void){ 2969 2970 log_info("hci_power_control_wake"); 2971 2972 // wake on 2973 if (hci_stack->control && hci_stack->control->wake){ 2974 (*hci_stack->control->wake)(); 2975 } 2976 2977 #if 0 2978 // open low-level device 2979 int err = hci_stack->hci_transport->open(hci_stack->config); 2980 if (err){ 2981 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2982 if (hci_stack->control && hci_stack->control->off){ 2983 (*hci_stack->control->off)(); 2984 } 2985 hci_emit_hci_open_failed(); 2986 return err; 2987 } 2988 #endif 2989 2990 return 0; 2991 } 2992 2993 static void hci_power_transition_to_initializing(void){ 2994 // set up state machine 2995 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2996 hci_stack->hci_packet_buffer_reserved = 0; 2997 hci_stack->state = HCI_STATE_INITIALIZING; 2998 hci_stack->substate = HCI_INIT_SEND_RESET; 2999 } 3000 3001 int hci_power_control(HCI_POWER_MODE power_mode){ 3002 3003 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3004 3005 int err = 0; 3006 switch (hci_stack->state){ 3007 3008 case HCI_STATE_OFF: 3009 switch (power_mode){ 3010 case HCI_POWER_ON: 3011 err = hci_power_control_on(); 3012 if (err) { 3013 log_error("hci_power_control_on() error %d", err); 3014 return err; 3015 } 3016 hci_power_transition_to_initializing(); 3017 break; 3018 case HCI_POWER_OFF: 3019 // do nothing 3020 break; 3021 case HCI_POWER_SLEEP: 3022 // do nothing (with SLEEP == OFF) 3023 break; 3024 } 3025 break; 3026 3027 case HCI_STATE_INITIALIZING: 3028 switch (power_mode){ 3029 case HCI_POWER_ON: 3030 // do nothing 3031 break; 3032 case HCI_POWER_OFF: 3033 // no connections yet, just turn it off 3034 hci_power_control_off(); 3035 break; 3036 case HCI_POWER_SLEEP: 3037 // no connections yet, just turn it off 3038 hci_power_control_sleep(); 3039 break; 3040 } 3041 break; 3042 3043 case HCI_STATE_WORKING: 3044 switch (power_mode){ 3045 case HCI_POWER_ON: 3046 // do nothing 3047 break; 3048 case HCI_POWER_OFF: 3049 // see hci_run 3050 hci_stack->state = HCI_STATE_HALTING; 3051 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3052 break; 3053 case HCI_POWER_SLEEP: 3054 // see hci_run 3055 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3056 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3057 break; 3058 } 3059 break; 3060 3061 case HCI_STATE_HALTING: 3062 switch (power_mode){ 3063 case HCI_POWER_ON: 3064 hci_power_transition_to_initializing(); 3065 break; 3066 case HCI_POWER_OFF: 3067 // do nothing 3068 break; 3069 case HCI_POWER_SLEEP: 3070 // see hci_run 3071 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3072 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3073 break; 3074 } 3075 break; 3076 3077 case HCI_STATE_FALLING_ASLEEP: 3078 switch (power_mode){ 3079 case HCI_POWER_ON: 3080 3081 #ifdef HAVE_PLATFORM_IPHONE_OS 3082 // nothing to do, if H4 supports power management 3083 if (btstack_control_iphone_power_management_enabled()){ 3084 hci_stack->state = HCI_STATE_INITIALIZING; 3085 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3086 break; 3087 } 3088 #endif 3089 hci_power_transition_to_initializing(); 3090 break; 3091 case HCI_POWER_OFF: 3092 // see hci_run 3093 hci_stack->state = HCI_STATE_HALTING; 3094 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3095 break; 3096 case HCI_POWER_SLEEP: 3097 // do nothing 3098 break; 3099 } 3100 break; 3101 3102 case HCI_STATE_SLEEPING: 3103 switch (power_mode){ 3104 case HCI_POWER_ON: 3105 3106 #ifdef HAVE_PLATFORM_IPHONE_OS 3107 // nothing to do, if H4 supports power management 3108 if (btstack_control_iphone_power_management_enabled()){ 3109 hci_stack->state = HCI_STATE_INITIALIZING; 3110 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3111 hci_update_scan_enable(); 3112 break; 3113 } 3114 #endif 3115 err = hci_power_control_wake(); 3116 if (err) return err; 3117 hci_power_transition_to_initializing(); 3118 break; 3119 case HCI_POWER_OFF: 3120 hci_stack->state = HCI_STATE_HALTING; 3121 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3122 break; 3123 case HCI_POWER_SLEEP: 3124 // do nothing 3125 break; 3126 } 3127 break; 3128 } 3129 3130 // create internal event 3131 hci_emit_state(); 3132 3133 // trigger next/first action 3134 hci_run(); 3135 3136 return 0; 3137 } 3138 3139 3140 #ifdef ENABLE_CLASSIC 3141 3142 static void hci_update_scan_enable(void){ 3143 // 2 = page scan, 1 = inq scan 3144 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 3145 hci_run(); 3146 } 3147 3148 void gap_discoverable_control(uint8_t enable){ 3149 if (enable) enable = 1; // normalize argument 3150 3151 if (hci_stack->discoverable == enable){ 3152 hci_emit_discoverable_enabled(hci_stack->discoverable); 3153 return; 3154 } 3155 3156 hci_stack->discoverable = enable; 3157 hci_update_scan_enable(); 3158 } 3159 3160 void gap_connectable_control(uint8_t enable){ 3161 if (enable) enable = 1; // normalize argument 3162 3163 // don't emit event 3164 if (hci_stack->connectable == enable) return; 3165 3166 hci_stack->connectable = enable; 3167 hci_update_scan_enable(); 3168 } 3169 #endif 3170 3171 void gap_local_bd_addr(bd_addr_t address_buffer){ 3172 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3173 } 3174 3175 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3176 static void hci_host_num_completed_packets(void){ 3177 3178 // create packet manually as arrays are not supported and num_commands should not get reduced 3179 hci_reserve_packet_buffer(); 3180 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3181 3182 uint16_t size = 0; 3183 uint16_t num_handles = 0; 3184 packet[size++] = 0x35; 3185 packet[size++] = 0x0c; 3186 size++; // skip param len 3187 size++; // skip num handles 3188 3189 // add { handle, packets } entries 3190 btstack_linked_item_t * it; 3191 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3192 hci_connection_t * connection = (hci_connection_t *) it; 3193 if (connection->num_packets_completed){ 3194 little_endian_store_16(packet, size, connection->con_handle); 3195 size += 2; 3196 little_endian_store_16(packet, size, connection->num_packets_completed); 3197 size += 2; 3198 // 3199 num_handles++; 3200 connection->num_packets_completed = 0; 3201 } 3202 } 3203 3204 packet[2] = size - 3; 3205 packet[3] = num_handles; 3206 3207 hci_stack->host_completed_packets = 0; 3208 3209 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3210 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3211 3212 // release packet buffer for synchronous transport implementations 3213 if (hci_transport_synchronous()){ 3214 hci_release_packet_buffer(); 3215 hci_emit_transport_packet_sent(); 3216 } 3217 } 3218 #endif 3219 3220 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3221 UNUSED(ds); 3222 hci_stack->substate = HCI_HALTING_CLOSE; 3223 // allow packet handlers to defer final shutdown 3224 hci_emit_state(); 3225 hci_run(); 3226 } 3227 3228 static void hci_run(void){ 3229 3230 // log_info("hci_run: entered"); 3231 btstack_linked_item_t * it; 3232 3233 // send continuation fragments first, as they block the prepared packet buffer 3234 if (hci_stack->acl_fragmentation_total_size > 0) { 3235 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3236 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3237 if (connection) { 3238 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3239 hci_send_acl_packet_fragments(connection); 3240 return; 3241 } 3242 } else { 3243 // connection gone -> discard further fragments 3244 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3245 hci_stack->acl_fragmentation_total_size = 0; 3246 hci_stack->acl_fragmentation_pos = 0; 3247 } 3248 } 3249 3250 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3251 // send host num completed packets next as they don't require num_cmd_packets > 0 3252 if (!hci_can_send_comand_packet_transport()) return; 3253 if (hci_stack->host_completed_packets){ 3254 hci_host_num_completed_packets(); 3255 return; 3256 } 3257 #endif 3258 3259 if (!hci_can_send_command_packet_now()) return; 3260 3261 // global/non-connection oriented commands 3262 3263 #ifdef ENABLE_CLASSIC 3264 // decline incoming connections 3265 if (hci_stack->decline_reason){ 3266 uint8_t reason = hci_stack->decline_reason; 3267 hci_stack->decline_reason = 0; 3268 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3269 return; 3270 } 3271 // send scan enable 3272 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 3273 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3274 hci_stack->new_scan_enable_value = 0xff; 3275 return; 3276 } 3277 // start/stop inquiry 3278 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 3279 uint8_t duration = hci_stack->inquiry_state; 3280 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3281 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3282 return; 3283 } 3284 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3285 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3286 hci_send_cmd(&hci_inquiry_cancel); 3287 return; 3288 } 3289 // remote name request 3290 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3291 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3292 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3293 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3294 return; 3295 } 3296 // pairing 3297 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3298 uint8_t state = hci_stack->gap_pairing_state; 3299 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3300 switch (state){ 3301 case GAP_PAIRING_STATE_SEND_PIN: 3302 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); 3303 break; 3304 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3305 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3306 break; 3307 case GAP_PAIRING_STATE_SEND_PASSKEY: 3308 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3309 break; 3310 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3311 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3312 break; 3313 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3314 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3315 break; 3316 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3317 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3318 break; 3319 default: 3320 break; 3321 } 3322 return; 3323 } 3324 #endif 3325 3326 #ifdef ENABLE_BLE 3327 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 3328 if ((hci_stack->state == HCI_STATE_WORKING) 3329 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 3330 3331 #ifdef ENABLE_LE_CENTRAL 3332 // handle le scan 3333 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3334 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3335 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3336 return; 3337 } 3338 if (hci_stack->le_scan_type != 0xff){ 3339 // defaults: active scanning, accept all advertisement packets 3340 int scan_type = hci_stack->le_scan_type; 3341 hci_stack->le_scan_type = 0xff; 3342 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); 3343 return; 3344 } 3345 #endif 3346 #ifdef ENABLE_LE_PERIPHERAL 3347 // le advertisement control 3348 if (hci_stack->le_advertisements_todo){ 3349 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3350 } 3351 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3352 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3353 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3354 return; 3355 } 3356 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3357 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3358 hci_send_cmd(&hci_le_set_advertising_parameters, 3359 hci_stack->le_advertisements_interval_min, 3360 hci_stack->le_advertisements_interval_max, 3361 hci_stack->le_advertisements_type, 3362 hci_stack->le_own_addr_type, 3363 hci_stack->le_advertisements_direct_address_type, 3364 hci_stack->le_advertisements_direct_address, 3365 hci_stack->le_advertisements_channel_map, 3366 hci_stack->le_advertisements_filter_policy); 3367 return; 3368 } 3369 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3370 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3371 uint8_t adv_data_clean[31]; 3372 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3373 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 3374 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3375 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3376 return; 3377 } 3378 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3379 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3380 uint8_t scan_data_clean[31]; 3381 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3382 memcpy(scan_data_clean, hci_stack->le_scan_response_data, hci_stack->le_scan_response_data_len); 3383 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3384 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3385 return; 3386 } 3387 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3388 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3389 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3390 return; 3391 } 3392 #endif 3393 3394 #ifdef ENABLE_LE_CENTRAL 3395 // 3396 // LE Whitelist Management 3397 // 3398 3399 // check if whitelist needs modification 3400 btstack_linked_list_iterator_t lit; 3401 int modification_pending = 0; 3402 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3403 while (btstack_linked_list_iterator_has_next(&lit)){ 3404 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3405 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3406 modification_pending = 1; 3407 break; 3408 } 3409 } 3410 3411 if (modification_pending){ 3412 // stop connnecting if modification pending 3413 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3414 hci_send_cmd(&hci_le_create_connection_cancel); 3415 return; 3416 } 3417 3418 // add/remove entries 3419 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3420 while (btstack_linked_list_iterator_has_next(&lit)){ 3421 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3422 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3423 entry->state = LE_WHITELIST_ON_CONTROLLER; 3424 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3425 return; 3426 3427 } 3428 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3429 bd_addr_t address; 3430 bd_addr_type_t address_type = entry->address_type; 3431 memcpy(address, entry->address, 6); 3432 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3433 btstack_memory_whitelist_entry_free(entry); 3434 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3435 return; 3436 } 3437 } 3438 } 3439 3440 // start connecting 3441 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3442 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3443 bd_addr_t null_addr; 3444 memset(null_addr, 0, 6); 3445 hci_send_cmd(&hci_le_create_connection, 3446 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3447 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3448 1, // use whitelist 3449 0, // peer address type 3450 null_addr, // peer bd addr 3451 hci_stack->le_own_addr_type, // our addr type: 3452 hci_stack->le_connection_interval_min, // conn interval min 3453 hci_stack->le_connection_interval_max, // conn interval max 3454 hci_stack->le_connection_latency, // conn latency 3455 hci_stack->le_supervision_timeout, // conn latency 3456 hci_stack->le_minimum_ce_length, // min ce length 3457 hci_stack->le_maximum_ce_length // max ce length 3458 ); 3459 return; 3460 } 3461 #endif 3462 } 3463 #endif 3464 3465 // send pending HCI commands 3466 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3467 hci_connection_t * connection = (hci_connection_t *) it; 3468 3469 switch(connection->state){ 3470 case SEND_CREATE_CONNECTION: 3471 switch(connection->address_type){ 3472 #ifdef ENABLE_CLASSIC 3473 case BD_ADDR_TYPE_CLASSIC: 3474 log_info("sending hci_create_connection"); 3475 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3476 break; 3477 #endif 3478 default: 3479 #ifdef ENABLE_BLE 3480 #ifdef ENABLE_LE_CENTRAL 3481 // track outgoing connection 3482 hci_stack->outgoing_addr_type = connection->address_type; 3483 memcpy(hci_stack->outgoing_addr, connection->address, 6); 3484 log_info("sending hci_le_create_connection"); 3485 hci_send_cmd(&hci_le_create_connection, 3486 hci_stack->le_connection_scan_interval, // conn scan interval 3487 hci_stack->le_connection_scan_window, // conn scan windows 3488 0, // don't use whitelist 3489 connection->address_type, // peer address type 3490 connection->address, // peer bd addr 3491 hci_stack->le_own_addr_type, // our addr type: 3492 hci_stack->le_connection_interval_min, // conn interval min 3493 hci_stack->le_connection_interval_max, // conn interval max 3494 hci_stack->le_connection_latency, // conn latency 3495 hci_stack->le_supervision_timeout, // conn latency 3496 hci_stack->le_minimum_ce_length, // min ce length 3497 hci_stack->le_maximum_ce_length // max ce length 3498 ); 3499 connection->state = SENT_CREATE_CONNECTION; 3500 #endif 3501 #endif 3502 break; 3503 } 3504 return; 3505 3506 #ifdef ENABLE_CLASSIC 3507 case RECEIVED_CONNECTION_REQUEST: 3508 connection->role = HCI_ROLE_SLAVE; 3509 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3510 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3511 connection->state = ACCEPTED_CONNECTION_REQUEST; 3512 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3513 } 3514 return; 3515 #endif 3516 3517 #ifdef ENABLE_BLE 3518 #ifdef ENABLE_LE_CENTRAL 3519 case SEND_CANCEL_CONNECTION: 3520 connection->state = SENT_CANCEL_CONNECTION; 3521 hci_send_cmd(&hci_le_create_connection_cancel); 3522 return; 3523 #endif 3524 #endif 3525 case SEND_DISCONNECT: 3526 connection->state = SENT_DISCONNECT; 3527 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3528 return; 3529 3530 default: 3531 break; 3532 } 3533 3534 // no further commands if connection is about to get shut down 3535 if (connection->state == SENT_DISCONNECT) continue; 3536 3537 #ifdef ENABLE_CLASSIC 3538 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3539 log_info("responding to link key request"); 3540 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3541 link_key_t link_key; 3542 link_key_type_t link_key_type; 3543 if ( hci_stack->link_key_db 3544 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3545 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3546 connection->link_key_type = link_key_type; 3547 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3548 } else { 3549 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3550 } 3551 return; 3552 } 3553 3554 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3555 log_info("denying to pin request"); 3556 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3557 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3558 return; 3559 } 3560 3561 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3562 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3563 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3564 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3565 // tweak authentication requirements 3566 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3567 if (connection->bonding_flags & BONDING_DEDICATED){ 3568 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3569 } 3570 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3571 authreq |= 1; 3572 } 3573 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3574 } else { 3575 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3576 } 3577 return; 3578 } 3579 3580 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3581 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3582 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3583 return; 3584 } 3585 3586 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3587 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3588 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3589 return; 3590 } 3591 3592 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3593 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3594 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3595 return; 3596 } 3597 3598 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3599 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3600 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3601 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3602 return; 3603 } 3604 3605 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3606 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3607 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3608 return; 3609 } 3610 3611 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3612 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3613 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3614 return; 3615 } 3616 #endif 3617 3618 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3619 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3620 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3621 return; 3622 } 3623 3624 #ifdef ENABLE_CLASSIC 3625 uint16_t sniff_min_interval; 3626 switch (connection->sniff_min_interval){ 3627 case 0: 3628 break; 3629 case 0xffff: 3630 connection->sniff_min_interval = 0; 3631 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3632 return; 3633 default: 3634 sniff_min_interval = connection->sniff_min_interval; 3635 connection->sniff_min_interval = 0; 3636 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3637 return; 3638 } 3639 #endif 3640 3641 #ifdef ENABLE_BLE 3642 switch (connection->le_con_parameter_update_state){ 3643 // response to L2CAP CON PARAMETER UPDATE REQUEST 3644 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3645 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3646 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3647 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3648 0x0000, 0xffff); 3649 return; 3650 case CON_PARAMETER_UPDATE_REPLY: 3651 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3652 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3653 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3654 0x0000, 0xffff); 3655 return; 3656 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3657 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3658 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3659 return; 3660 default: 3661 break; 3662 } 3663 if (connection->le_phy_update_all_phys != 0xff){ 3664 uint8_t all_phys = connection->le_phy_update_all_phys; 3665 connection->le_phy_update_all_phys = 0xff; 3666 hci_send_cmd(&hci_le_set_phy, connection->con_handle, all_phys, connection->le_phy_update_tx_phys, connection->le_phy_update_rx_phys, connection->le_phy_update_phy_options); 3667 return; 3668 } 3669 #endif 3670 } 3671 3672 hci_connection_t * connection; 3673 switch (hci_stack->state){ 3674 case HCI_STATE_INITIALIZING: 3675 hci_initializing_run(); 3676 break; 3677 3678 case HCI_STATE_HALTING: 3679 3680 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 3681 switch (hci_stack->substate){ 3682 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 3683 case HCI_HALTING_DISCONNECT_ALL_TIMER: 3684 3685 #ifdef ENABLE_BLE 3686 #ifdef ENABLE_LE_CENTRAL 3687 // free whitelist entries 3688 { 3689 btstack_linked_list_iterator_t lit; 3690 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3691 while (btstack_linked_list_iterator_has_next(&lit)){ 3692 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3693 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3694 btstack_memory_whitelist_entry_free(entry); 3695 } 3696 } 3697 #endif 3698 #endif 3699 // close all open connections 3700 connection = (hci_connection_t *) hci_stack->connections; 3701 if (connection){ 3702 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3703 if (!hci_can_send_command_packet_now()) return; 3704 3705 // check state 3706 if (connection->state == SENT_DISCONNECT) return; 3707 connection->state = SENT_DISCONNECT; 3708 3709 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3710 3711 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3712 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3713 3714 // ... which would be ignored anyway as we shutdown (free) the connection now 3715 hci_shutdown_connection(connection); 3716 3717 // finally, send the disconnect command 3718 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3719 return; 3720 } 3721 3722 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 3723 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 3724 log_info("HCI_STATE_HALTING: wait 50 ms"); 3725 hci_stack->substate = HCI_HALTING_W4_TIMER; 3726 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 3727 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3728 btstack_run_loop_add_timer(&hci_stack->timeout); 3729 break; 3730 } 3731 3732 /* explicit fall-through */ 3733 3734 case HCI_HALTING_CLOSE: 3735 log_info("HCI_STATE_HALTING, calling off"); 3736 3737 // switch mode 3738 hci_power_control_off(); 3739 3740 log_info("HCI_STATE_HALTING, emitting state"); 3741 hci_emit_state(); 3742 log_info("HCI_STATE_HALTING, done"); 3743 break; 3744 3745 case HCI_HALTING_W4_TIMER: 3746 // keep waiting 3747 3748 break; 3749 default: 3750 break; 3751 } 3752 3753 break; 3754 3755 case HCI_STATE_FALLING_ASLEEP: 3756 switch(hci_stack->substate) { 3757 case HCI_FALLING_ASLEEP_DISCONNECT: 3758 log_info("HCI_STATE_FALLING_ASLEEP"); 3759 // close all open connections 3760 connection = (hci_connection_t *) hci_stack->connections; 3761 3762 #ifdef HAVE_PLATFORM_IPHONE_OS 3763 // don't close connections, if H4 supports power management 3764 if (btstack_control_iphone_power_management_enabled()){ 3765 connection = NULL; 3766 } 3767 #endif 3768 if (connection){ 3769 3770 // send disconnect 3771 if (!hci_can_send_command_packet_now()) return; 3772 3773 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3774 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3775 3776 // send disconnected event right away - causes higher layer connections to get closed, too. 3777 hci_shutdown_connection(connection); 3778 return; 3779 } 3780 3781 if (hci_classic_supported()){ 3782 // disable page and inquiry scan 3783 if (!hci_can_send_command_packet_now()) return; 3784 3785 log_info("HCI_STATE_HALTING, disabling inq scans"); 3786 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3787 3788 // continue in next sub state 3789 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3790 break; 3791 } 3792 // no break - fall through for ble-only chips 3793 3794 case HCI_FALLING_ASLEEP_COMPLETE: 3795 log_info("HCI_STATE_HALTING, calling sleep"); 3796 #ifdef HAVE_PLATFORM_IPHONE_OS 3797 // don't actually go to sleep, if H4 supports power management 3798 if (btstack_control_iphone_power_management_enabled()){ 3799 // SLEEP MODE reached 3800 hci_stack->state = HCI_STATE_SLEEPING; 3801 hci_emit_state(); 3802 break; 3803 } 3804 #endif 3805 // switch mode 3806 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3807 hci_emit_state(); 3808 break; 3809 3810 default: 3811 break; 3812 } 3813 break; 3814 3815 default: 3816 break; 3817 } 3818 } 3819 3820 int hci_send_cmd_packet(uint8_t *packet, int size){ 3821 // house-keeping 3822 3823 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3824 hci_stack->loopback_mode = packet[3]; 3825 } 3826 3827 #ifdef ENABLE_CLASSIC 3828 bd_addr_t addr; 3829 hci_connection_t * conn; 3830 3831 // create_connection? 3832 if (IS_COMMAND(packet, hci_create_connection)){ 3833 reverse_bd_addr(&packet[3], addr); 3834 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3835 3836 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3837 if (!conn){ 3838 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3839 if (!conn){ 3840 // notify client that alloc failed 3841 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3842 return -1; // packet not sent to controller 3843 } 3844 conn->state = SEND_CREATE_CONNECTION; 3845 } 3846 log_info("conn state %u", conn->state); 3847 switch (conn->state){ 3848 // if connection active exists 3849 case OPEN: 3850 // and OPEN, emit connection complete command 3851 hci_emit_connection_complete(addr, conn->con_handle, 0); 3852 return -1; // packet not sent to controller 3853 case SEND_CREATE_CONNECTION: 3854 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 3855 break; 3856 default: 3857 // otherwise, just ignore as it is already in the open process 3858 return -1; // packet not sent to controller 3859 } 3860 conn->state = SENT_CREATE_CONNECTION; 3861 3862 // track outgoing connection 3863 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_CLASSIC; 3864 memcpy(hci_stack->outgoing_addr, addr, 6); 3865 } 3866 3867 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3868 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3869 } 3870 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3871 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3872 } 3873 3874 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3875 if (hci_stack->link_key_db){ 3876 reverse_bd_addr(&packet[3], addr); 3877 hci_stack->link_key_db->delete_link_key(addr); 3878 } 3879 } 3880 3881 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3882 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3883 reverse_bd_addr(&packet[3], addr); 3884 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3885 if (conn){ 3886 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3887 } 3888 } 3889 3890 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3891 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3892 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3893 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3894 reverse_bd_addr(&packet[3], addr); 3895 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3896 if (conn){ 3897 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3898 } 3899 } 3900 3901 #ifdef ENABLE_SCO_OVER_HCI 3902 // setup_synchronous_connection? Voice setting at offset 22 3903 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3904 // TODO: compare to current setting if sco connection already active 3905 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3906 } 3907 // accept_synchronus_connection? Voice setting at offset 18 3908 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3909 // TODO: compare to current setting if sco connection already active 3910 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3911 } 3912 #endif 3913 #endif 3914 3915 #ifdef ENABLE_BLE 3916 #ifdef ENABLE_LE_PERIPHERAL 3917 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3918 hci_stack->le_random_address_set = 1; 3919 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3920 } 3921 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3922 hci_stack->le_advertisements_active = packet[3]; 3923 } 3924 #endif 3925 #ifdef ENABLE_LE_CENTRAL 3926 if (IS_COMMAND(packet, hci_le_create_connection)){ 3927 // white list used? 3928 uint8_t initiator_filter_policy = packet[7]; 3929 switch (initiator_filter_policy){ 3930 case 0: 3931 // whitelist not used 3932 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3933 break; 3934 case 1: 3935 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3936 break; 3937 default: 3938 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3939 break; 3940 } 3941 } 3942 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3943 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3944 } 3945 #endif 3946 #endif 3947 3948 hci_stack->num_cmd_packets--; 3949 3950 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3951 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3952 } 3953 3954 // disconnect because of security block 3955 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3956 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3957 if (!connection) return; 3958 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3959 } 3960 3961 3962 // Configure Secure Simple Pairing 3963 3964 #ifdef ENABLE_CLASSIC 3965 3966 // enable will enable SSP during init 3967 void gap_ssp_set_enable(int enable){ 3968 hci_stack->ssp_enable = enable; 3969 } 3970 3971 static int hci_local_ssp_activated(void){ 3972 return gap_ssp_supported() && hci_stack->ssp_enable; 3973 } 3974 3975 // if set, BTstack will respond to io capability request using authentication requirement 3976 void gap_ssp_set_io_capability(int io_capability){ 3977 hci_stack->ssp_io_capability = io_capability; 3978 } 3979 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3980 hci_stack->ssp_authentication_requirement = authentication_requirement; 3981 } 3982 3983 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3984 void gap_ssp_set_auto_accept(int auto_accept){ 3985 hci_stack->ssp_auto_accept = auto_accept; 3986 } 3987 #endif 3988 3989 // va_list part of hci_send_cmd 3990 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3991 if (!hci_can_send_command_packet_now()){ 3992 log_error("hci_send_cmd called but cannot send packet now"); 3993 return 0; 3994 } 3995 3996 // for HCI INITIALIZATION 3997 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3998 hci_stack->last_cmd_opcode = cmd->opcode; 3999 4000 hci_reserve_packet_buffer(); 4001 uint8_t * packet = hci_stack->hci_packet_buffer; 4002 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4003 int err = hci_send_cmd_packet(packet, size); 4004 4005 // release packet buffer for synchronous transport implementations 4006 if (hci_transport_synchronous()){ 4007 hci_release_packet_buffer(); 4008 hci_emit_transport_packet_sent(); 4009 } 4010 4011 return err; 4012 } 4013 4014 /** 4015 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4016 */ 4017 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4018 va_list argptr; 4019 va_start(argptr, cmd); 4020 int res = hci_send_cmd_va_arg(cmd, argptr); 4021 va_end(argptr); 4022 return res; 4023 } 4024 4025 // Create various non-HCI events. 4026 // TODO: generalize, use table similar to hci_create_command 4027 4028 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4029 // dump packet 4030 if (dump) { 4031 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4032 } 4033 4034 // dispatch to all event handlers 4035 btstack_linked_list_iterator_t it; 4036 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4037 while (btstack_linked_list_iterator_has_next(&it)){ 4038 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4039 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4040 } 4041 } 4042 4043 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4044 if (!hci_stack->acl_packet_handler) return; 4045 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4046 } 4047 4048 #ifdef ENABLE_CLASSIC 4049 static void hci_notify_if_sco_can_send_now(void){ 4050 // notify SCO sender if waiting 4051 if (!hci_stack->sco_waiting_for_can_send_now) return; 4052 if (hci_can_send_sco_packet_now()){ 4053 hci_stack->sco_waiting_for_can_send_now = 0; 4054 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4055 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4056 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4057 } 4058 } 4059 4060 // parsing end emitting has been merged to reduce code size 4061 static void gap_inquiry_explode(uint8_t * packet){ 4062 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4063 4064 uint8_t * eir_data; 4065 ad_context_t context; 4066 const uint8_t * name; 4067 uint8_t name_len; 4068 4069 int event_type = hci_event_packet_get_type(packet); 4070 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 4071 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4072 4073 // event[1] is set at the end 4074 int i; 4075 for (i=0; i<num_responses;i++){ 4076 memset(event, 0, sizeof(event)); 4077 event[0] = GAP_EVENT_INQUIRY_RESULT; 4078 uint8_t event_size = 18; // if name is not set by EIR 4079 4080 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 4081 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 4082 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 4083 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 4084 4085 switch (event_type){ 4086 case HCI_EVENT_INQUIRY_RESULT: 4087 // 14,15,16,17 = 0, size 18 4088 break; 4089 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4090 event[14] = 1; 4091 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 4092 // 16,17 = 0, size 18 4093 break; 4094 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4095 event[14] = 1; 4096 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 4097 // for EIR packets, there is only one reponse in it 4098 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4099 name = NULL; 4100 // EIR data is 240 bytes in EIR event 4101 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4102 uint8_t data_type = ad_iterator_get_data_type(&context); 4103 uint8_t data_size = ad_iterator_get_data_len(&context); 4104 const uint8_t * data = ad_iterator_get_data(&context); 4105 // Prefer Complete Local Name over Shortend Local Name 4106 switch (data_type){ 4107 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4108 if (name) continue; 4109 /* explicit fall-through */ 4110 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4111 name = data; 4112 name_len = data_size; 4113 break; 4114 default: 4115 break; 4116 } 4117 } 4118 if (name){ 4119 event[16] = 1; 4120 // truncate name if needed 4121 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4122 event[17] = len; 4123 memcpy(&event[18], name, len); 4124 event_size += len; 4125 } 4126 break; 4127 } 4128 event[1] = event_size - 2; 4129 hci_emit_event(event, event_size, 1); 4130 } 4131 } 4132 #endif 4133 4134 void hci_emit_state(void){ 4135 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4136 uint8_t event[3]; 4137 event[0] = BTSTACK_EVENT_STATE; 4138 event[1] = sizeof(event) - 2; 4139 event[2] = hci_stack->state; 4140 hci_emit_event(event, sizeof(event), 1); 4141 } 4142 4143 #ifdef ENABLE_CLASSIC 4144 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4145 uint8_t event[13]; 4146 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4147 event[1] = sizeof(event) - 2; 4148 event[2] = status; 4149 little_endian_store_16(event, 3, con_handle); 4150 reverse_bd_addr(address, &event[5]); 4151 event[11] = 1; // ACL connection 4152 event[12] = 0; // encryption disabled 4153 hci_emit_event(event, sizeof(event), 1); 4154 } 4155 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4156 if (disable_l2cap_timeouts) return; 4157 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4158 uint8_t event[4]; 4159 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4160 event[1] = sizeof(event) - 2; 4161 little_endian_store_16(event, 2, conn->con_handle); 4162 hci_emit_event(event, sizeof(event), 1); 4163 } 4164 #endif 4165 4166 #ifdef ENABLE_BLE 4167 #ifdef ENABLE_LE_CENTRAL 4168 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4169 uint8_t event[21]; 4170 event[0] = HCI_EVENT_LE_META; 4171 event[1] = sizeof(event) - 2; 4172 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4173 event[3] = status; 4174 little_endian_store_16(event, 4, con_handle); 4175 event[6] = 0; // TODO: role 4176 event[7] = address_type; 4177 reverse_bd_addr(address, &event[8]); 4178 little_endian_store_16(event, 14, 0); // interval 4179 little_endian_store_16(event, 16, 0); // latency 4180 little_endian_store_16(event, 18, 0); // supervision timeout 4181 event[20] = 0; // master clock accuracy 4182 hci_emit_event(event, sizeof(event), 1); 4183 } 4184 #endif 4185 #endif 4186 4187 static void hci_emit_transport_packet_sent(void){ 4188 // notify upper stack that it might be possible to send again 4189 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4190 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4191 } 4192 4193 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4194 uint8_t event[6]; 4195 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4196 event[1] = sizeof(event) - 2; 4197 event[2] = 0; // status = OK 4198 little_endian_store_16(event, 3, con_handle); 4199 event[5] = reason; 4200 hci_emit_event(event, sizeof(event), 1); 4201 } 4202 4203 static void hci_emit_nr_connections_changed(void){ 4204 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4205 uint8_t event[3]; 4206 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4207 event[1] = sizeof(event) - 2; 4208 event[2] = nr_hci_connections(); 4209 hci_emit_event(event, sizeof(event), 1); 4210 } 4211 4212 static void hci_emit_hci_open_failed(void){ 4213 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4214 uint8_t event[2]; 4215 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4216 event[1] = sizeof(event) - 2; 4217 hci_emit_event(event, sizeof(event), 1); 4218 } 4219 4220 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4221 log_info("hci_emit_dedicated_bonding_result %u ", status); 4222 uint8_t event[9]; 4223 int pos = 0; 4224 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4225 event[pos++] = sizeof(event) - 2; 4226 event[pos++] = status; 4227 reverse_bd_addr(address, &event[pos]); 4228 hci_emit_event(event, sizeof(event), 1); 4229 } 4230 4231 4232 #ifdef ENABLE_CLASSIC 4233 4234 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4235 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4236 uint8_t event[5]; 4237 int pos = 0; 4238 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4239 event[pos++] = sizeof(event) - 2; 4240 little_endian_store_16(event, 2, con_handle); 4241 pos += 2; 4242 event[pos++] = level; 4243 hci_emit_event(event, sizeof(event), 1); 4244 } 4245 4246 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4247 if (!connection) return LEVEL_0; 4248 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4249 return gap_security_level_for_link_key_type(connection->link_key_type); 4250 } 4251 4252 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4253 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4254 uint8_t event[3]; 4255 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4256 event[1] = sizeof(event) - 2; 4257 event[2] = enabled; 4258 hci_emit_event(event, sizeof(event), 1); 4259 } 4260 4261 #ifdef ENABLE_CLASSIC 4262 // query if remote side supports eSCO 4263 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4264 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4265 if (!connection) return 0; 4266 return connection->remote_supported_feature_eSCO; 4267 } 4268 4269 // query if remote side supports SSP 4270 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4271 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4272 if (!connection) return 0; 4273 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 4274 } 4275 4276 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4277 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4278 } 4279 #endif 4280 4281 // GAP API 4282 /** 4283 * @bbrief enable/disable bonding. default is enabled 4284 * @praram enabled 4285 */ 4286 void gap_set_bondable_mode(int enable){ 4287 hci_stack->bondable = enable ? 1 : 0; 4288 } 4289 /** 4290 * @brief Get bondable mode. 4291 * @return 1 if bondable 4292 */ 4293 int gap_get_bondable_mode(void){ 4294 return hci_stack->bondable; 4295 } 4296 4297 /** 4298 * @brief map link keys to security levels 4299 */ 4300 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4301 switch (link_key_type){ 4302 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4303 return LEVEL_4; 4304 case COMBINATION_KEY: 4305 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4306 return LEVEL_3; 4307 default: 4308 return LEVEL_2; 4309 } 4310 } 4311 4312 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4313 log_info("gap_mitm_protection_required_for_security_level %u", level); 4314 return level > LEVEL_2; 4315 } 4316 4317 /** 4318 * @brief get current security level 4319 */ 4320 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4321 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4322 if (!connection) return LEVEL_0; 4323 return gap_security_level_for_connection(connection); 4324 } 4325 4326 /** 4327 * @brief request connection to device to 4328 * @result GAP_AUTHENTICATION_RESULT 4329 */ 4330 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4331 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4332 if (!connection){ 4333 hci_emit_security_level(con_handle, LEVEL_0); 4334 return; 4335 } 4336 gap_security_level_t current_level = gap_security_level(con_handle); 4337 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4338 requested_level, connection->requested_security_level, current_level); 4339 4340 // assumption: earlier requested security higher than current level => security request is active 4341 if (current_level < connection->requested_security_level){ 4342 if (connection->requested_security_level < requested_level){ 4343 // increase requested level as new level is higher 4344 4345 // TODO: handle re-authentication when done 4346 4347 connection->requested_security_level = requested_level; 4348 } 4349 return; 4350 } 4351 4352 // no request active, notify if security sufficient 4353 if (requested_level <= current_level){ 4354 hci_emit_security_level(con_handle, current_level); 4355 return; 4356 } 4357 4358 // start pairing to increase security level 4359 connection->requested_security_level = requested_level; 4360 4361 #if 0 4362 // sending encryption request without a link key results in an error. 4363 // TODO: figure out how to use it properly 4364 4365 // would enabling ecnryption suffice (>= LEVEL_2)? 4366 if (hci_stack->link_key_db){ 4367 link_key_type_t link_key_type; 4368 link_key_t link_key; 4369 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4370 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4371 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4372 return; 4373 } 4374 } 4375 } 4376 #endif 4377 4378 // start to authenticate connection 4379 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4380 hci_run(); 4381 } 4382 4383 /** 4384 * @brief start dedicated bonding with device. disconnect after bonding 4385 * @param device 4386 * @param request MITM protection 4387 * @result GAP_DEDICATED_BONDING_COMPLETE 4388 */ 4389 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4390 4391 // create connection state machine 4392 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 4393 4394 if (!connection){ 4395 return BTSTACK_MEMORY_ALLOC_FAILED; 4396 } 4397 4398 // delete linkn key 4399 gap_drop_link_key_for_bd_addr(device); 4400 4401 // configure LEVEL_2/3, dedicated bonding 4402 connection->state = SEND_CREATE_CONNECTION; 4403 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4404 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4405 connection->bonding_flags = BONDING_DEDICATED; 4406 4407 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4408 4409 // handle: connnection failure (connection complete != ok) 4410 // handle: authentication failure 4411 // handle: disconnect on done 4412 4413 hci_run(); 4414 4415 return 0; 4416 } 4417 #endif 4418 4419 void gap_set_local_name(const char * local_name){ 4420 hci_stack->local_name = local_name; 4421 } 4422 4423 4424 #ifdef ENABLE_BLE 4425 4426 #ifdef ENABLE_LE_CENTRAL 4427 void gap_start_scan(void){ 4428 hci_stack->le_scanning_enabled = 1; 4429 hci_run(); 4430 } 4431 4432 void gap_stop_scan(void){ 4433 hci_stack->le_scanning_enabled = 0; 4434 hci_run(); 4435 } 4436 4437 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4438 hci_stack->le_scan_type = scan_type; 4439 hci_stack->le_scan_interval = scan_interval; 4440 hci_stack->le_scan_window = scan_window; 4441 hci_run(); 4442 } 4443 4444 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4445 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4446 if (!conn){ 4447 log_info("gap_connect: no connection exists yet, creating context"); 4448 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4449 if (!conn){ 4450 // notify client that alloc failed 4451 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4452 log_info("gap_connect: failed to alloc hci_connection_t"); 4453 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4454 } 4455 conn->state = SEND_CREATE_CONNECTION; 4456 log_info("gap_connect: send create connection next"); 4457 hci_run(); 4458 return 0; 4459 } 4460 4461 if (!hci_is_le_connection(conn) || 4462 conn->state == SEND_CREATE_CONNECTION || 4463 conn->state == SENT_CREATE_CONNECTION) { 4464 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4465 log_error("gap_connect: classic connection or connect is already being created"); 4466 return GATT_CLIENT_IN_WRONG_STATE; 4467 } 4468 4469 log_info("gap_connect: context exists with state %u", conn->state); 4470 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4471 hci_run(); 4472 return 0; 4473 } 4474 4475 // @assumption: only a single outgoing LE Connection exists 4476 static hci_connection_t * gap_get_outgoing_connection(void){ 4477 btstack_linked_item_t *it; 4478 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4479 hci_connection_t * conn = (hci_connection_t *) it; 4480 if (!hci_is_le_connection(conn)) continue; 4481 switch (conn->state){ 4482 case SEND_CREATE_CONNECTION: 4483 case SENT_CREATE_CONNECTION: 4484 case SENT_CANCEL_CONNECTION: 4485 return conn; 4486 default: 4487 break; 4488 }; 4489 } 4490 return NULL; 4491 } 4492 4493 uint8_t gap_connect_cancel(void){ 4494 hci_connection_t * conn = gap_get_outgoing_connection(); 4495 if (!conn) return 0; 4496 switch (conn->state){ 4497 case SEND_CREATE_CONNECTION: 4498 // skip sending create connection and emit event instead 4499 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4500 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4501 btstack_memory_hci_connection_free( conn ); 4502 break; 4503 case SENT_CREATE_CONNECTION: 4504 // request to send cancel connection 4505 conn->state = SEND_CANCEL_CONNECTION; 4506 hci_run(); 4507 break; 4508 default: 4509 break; 4510 } 4511 return 0; 4512 } 4513 #endif 4514 4515 #ifdef ENABLE_LE_CENTRAL 4516 /** 4517 * @brief Set connection parameters for outgoing connections 4518 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4519 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4520 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4521 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4522 * @param conn_latency, default: 4 4523 * @param supervision_timeout (unit: 10ms), default: 720 ms 4524 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4525 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4526 */ 4527 4528 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4529 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4530 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4531 hci_stack->le_connection_scan_interval = conn_scan_interval; 4532 hci_stack->le_connection_scan_window = conn_scan_window; 4533 hci_stack->le_connection_interval_min = conn_interval_min; 4534 hci_stack->le_connection_interval_max = conn_interval_max; 4535 hci_stack->le_connection_latency = conn_latency; 4536 hci_stack->le_supervision_timeout = supervision_timeout; 4537 hci_stack->le_minimum_ce_length = min_ce_length; 4538 hci_stack->le_maximum_ce_length = max_ce_length; 4539 } 4540 #endif 4541 4542 /** 4543 * @brief Updates the connection parameters for a given LE connection 4544 * @param handle 4545 * @param conn_interval_min (unit: 1.25ms) 4546 * @param conn_interval_max (unit: 1.25ms) 4547 * @param conn_latency 4548 * @param supervision_timeout (unit: 10ms) 4549 * @returns 0 if ok 4550 */ 4551 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4552 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4553 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4554 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4555 connection->le_conn_interval_min = conn_interval_min; 4556 connection->le_conn_interval_max = conn_interval_max; 4557 connection->le_conn_latency = conn_latency; 4558 connection->le_supervision_timeout = supervision_timeout; 4559 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4560 hci_run(); 4561 return 0; 4562 } 4563 4564 /** 4565 * @brief Request an update of the connection parameter for a given LE connection 4566 * @param handle 4567 * @param conn_interval_min (unit: 1.25ms) 4568 * @param conn_interval_max (unit: 1.25ms) 4569 * @param conn_latency 4570 * @param supervision_timeout (unit: 10ms) 4571 * @returns 0 if ok 4572 */ 4573 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4574 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4575 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4576 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4577 connection->le_conn_interval_min = conn_interval_min; 4578 connection->le_conn_interval_max = conn_interval_max; 4579 connection->le_conn_latency = conn_latency; 4580 connection->le_supervision_timeout = supervision_timeout; 4581 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4582 hci_run(); 4583 return 0; 4584 } 4585 4586 #ifdef ENABLE_LE_PERIPHERAL 4587 4588 static void gap_advertisments_changed(void){ 4589 // disable advertisements before updating adv, scan data, or adv params 4590 if (hci_stack->le_advertisements_active){ 4591 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4592 } 4593 hci_run(); 4594 } 4595 4596 /** 4597 * @brief Set Advertisement Data 4598 * @param advertising_data_length 4599 * @param advertising_data (max 31 octets) 4600 * @note data is not copied, pointer has to stay valid 4601 */ 4602 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4603 hci_stack->le_advertisements_data_len = advertising_data_length; 4604 hci_stack->le_advertisements_data = advertising_data; 4605 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4606 gap_advertisments_changed(); 4607 } 4608 4609 /** 4610 * @brief Set Scan Response Data 4611 * @param advertising_data_length 4612 * @param advertising_data (max 31 octets) 4613 * @note data is not copied, pointer has to stay valid 4614 */ 4615 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4616 hci_stack->le_scan_response_data_len = scan_response_data_length; 4617 hci_stack->le_scan_response_data = scan_response_data; 4618 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4619 gap_advertisments_changed(); 4620 } 4621 4622 /** 4623 * @brief Set Advertisement Parameters 4624 * @param adv_int_min 4625 * @param adv_int_max 4626 * @param adv_type 4627 * @param direct_address_type 4628 * @param direct_address 4629 * @param channel_map 4630 * @param filter_policy 4631 * 4632 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4633 */ 4634 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4635 uint8_t direct_address_typ, bd_addr_t direct_address, 4636 uint8_t channel_map, uint8_t filter_policy) { 4637 4638 hci_stack->le_advertisements_interval_min = adv_int_min; 4639 hci_stack->le_advertisements_interval_max = adv_int_max; 4640 hci_stack->le_advertisements_type = adv_type; 4641 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4642 hci_stack->le_advertisements_channel_map = channel_map; 4643 hci_stack->le_advertisements_filter_policy = filter_policy; 4644 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4645 4646 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4647 gap_advertisments_changed(); 4648 } 4649 4650 /** 4651 * @brief Enable/Disable Advertisements 4652 * @param enabled 4653 */ 4654 void gap_advertisements_enable(int enabled){ 4655 hci_stack->le_advertisements_enabled = enabled; 4656 if (enabled && !hci_stack->le_advertisements_active){ 4657 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4658 } 4659 if (!enabled && hci_stack->le_advertisements_active){ 4660 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4661 } 4662 hci_run(); 4663 } 4664 4665 #endif 4666 4667 void hci_le_set_own_address_type(uint8_t own_address_type){ 4668 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4669 if (own_address_type == hci_stack->le_own_addr_type) return; 4670 hci_stack->le_own_addr_type = own_address_type; 4671 4672 #ifdef ENABLE_LE_PERIPHERAL 4673 // update advertisement parameters, too 4674 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4675 gap_advertisments_changed(); 4676 #endif 4677 #ifdef ENABLE_LE_CENTRAL 4678 // note: we don't update scan parameters or modify ongoing connection attempts 4679 #endif 4680 } 4681 4682 #endif 4683 4684 uint8_t gap_disconnect(hci_con_handle_t handle){ 4685 hci_connection_t * conn = hci_connection_for_handle(handle); 4686 if (!conn){ 4687 hci_emit_disconnection_complete(handle, 0); 4688 return 0; 4689 } 4690 // ignore if already disconnected 4691 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4692 return 0; 4693 } 4694 conn->state = SEND_DISCONNECT; 4695 hci_run(); 4696 return 0; 4697 } 4698 4699 /** 4700 * @brief Get connection type 4701 * @param con_handle 4702 * @result connection_type 4703 */ 4704 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4705 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4706 if (!conn) return GAP_CONNECTION_INVALID; 4707 switch (conn->address_type){ 4708 case BD_ADDR_TYPE_LE_PUBLIC: 4709 case BD_ADDR_TYPE_LE_RANDOM: 4710 return GAP_CONNECTION_LE; 4711 case BD_ADDR_TYPE_SCO: 4712 return GAP_CONNECTION_SCO; 4713 case BD_ADDR_TYPE_CLASSIC: 4714 return GAP_CONNECTION_ACL; 4715 default: 4716 return GAP_CONNECTION_INVALID; 4717 } 4718 } 4719 4720 #ifdef ENABLE_BLE 4721 4722 uint8_t gap_le_set_phy(hci_con_handle_t connection_handle, uint8_t all_phys, uint8_t tx_phys, uint8_t rx_phys, uint8_t phy_options){ 4723 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4724 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4725 4726 conn->le_phy_update_all_phys = all_phys; 4727 conn->le_phy_update_tx_phys = tx_phys; 4728 conn->le_phy_update_rx_phys = rx_phys; 4729 conn->le_phy_update_phy_options = phy_options; 4730 4731 hci_run(); 4732 4733 return 0; 4734 } 4735 4736 #ifdef ENABLE_LE_CENTRAL 4737 /** 4738 * @brief Auto Connection Establishment - Start Connecting to device 4739 * @param address_typ 4740 * @param address 4741 * @returns 0 if ok 4742 */ 4743 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4744 // check capacity 4745 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4746 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4747 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4748 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4749 entry->address_type = address_type; 4750 memcpy(entry->address, address, 6); 4751 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4752 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4753 hci_run(); 4754 return 0; 4755 } 4756 4757 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4758 btstack_linked_list_iterator_t it; 4759 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4760 while (btstack_linked_list_iterator_has_next(&it)){ 4761 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4762 if (entry->address_type != address_type) continue; 4763 if (memcmp(entry->address, address, 6) != 0) continue; 4764 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4765 // remove from controller if already present 4766 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4767 continue; 4768 } 4769 // direclty remove entry from whitelist 4770 btstack_linked_list_iterator_remove(&it); 4771 btstack_memory_whitelist_entry_free(entry); 4772 } 4773 } 4774 4775 /** 4776 * @brief Auto Connection Establishment - Stop Connecting to device 4777 * @param address_typ 4778 * @param address 4779 * @returns 0 if ok 4780 */ 4781 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4782 hci_remove_from_whitelist(address_type, address); 4783 hci_run(); 4784 return 0; 4785 } 4786 4787 /** 4788 * @brief Auto Connection Establishment - Stop everything 4789 * @note Convenience function to stop all active auto connection attempts 4790 */ 4791 void gap_auto_connection_stop_all(void){ 4792 btstack_linked_list_iterator_t it; 4793 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4794 while (btstack_linked_list_iterator_has_next(&it)){ 4795 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4796 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4797 // remove from controller if already present 4798 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4799 continue; 4800 } 4801 // directly remove entry from whitelist 4802 btstack_linked_list_iterator_remove(&it); 4803 btstack_memory_whitelist_entry_free(entry); 4804 } 4805 hci_run(); 4806 } 4807 4808 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 4809 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4810 if (!conn) return 0; 4811 return conn->le_connection_interval; 4812 } 4813 #endif 4814 #endif 4815 4816 #ifdef ENABLE_CLASSIC 4817 /** 4818 * @brief Set Extended Inquiry Response data 4819 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4820 * @note has to be done before stack starts up 4821 */ 4822 void gap_set_extended_inquiry_response(const uint8_t * data){ 4823 hci_stack->eir_data = data; 4824 } 4825 4826 /** 4827 * @brief Start GAP Classic Inquiry 4828 * @param duration in 1.28s units 4829 * @return 0 if ok 4830 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4831 */ 4832 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4833 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 4834 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4835 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4836 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4837 } 4838 hci_stack->inquiry_state = duration_in_1280ms_units; 4839 hci_run(); 4840 return 0; 4841 } 4842 4843 /** 4844 * @brief Stop GAP Classic Inquiry 4845 * @returns 0 if ok 4846 */ 4847 int gap_inquiry_stop(void){ 4848 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4849 // emit inquiry complete event, before it even started 4850 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4851 hci_emit_event(event, sizeof(event), 1); 4852 return 0; 4853 } 4854 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4855 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4856 hci_run(); 4857 return 0; 4858 } 4859 4860 4861 /** 4862 * @brief Remote Name Request 4863 * @param addr 4864 * @param page_scan_repetition_mode 4865 * @param clock_offset only used when bit 15 is set 4866 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4867 */ 4868 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4869 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4870 memcpy(hci_stack->remote_name_addr, addr, 6); 4871 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4872 hci_stack->remote_name_clock_offset = clock_offset; 4873 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4874 hci_run(); 4875 return 0; 4876 } 4877 4878 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4879 hci_stack->gap_pairing_state = state; 4880 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4881 hci_run(); 4882 return 0; 4883 } 4884 4885 /** 4886 * @brief Legacy Pairing Pin Code Response 4887 * @param addr 4888 * @param pin 4889 * @return 0 if ok 4890 */ 4891 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4892 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4893 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 4894 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4895 } 4896 4897 /** 4898 * @brief Abort Legacy Pairing 4899 * @param addr 4900 * @param pin 4901 * @return 0 if ok 4902 */ 4903 int gap_pin_code_negative(bd_addr_t addr){ 4904 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4905 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4906 } 4907 4908 /** 4909 * @brief SSP Passkey Response 4910 * @param addr 4911 * @param passkey 4912 * @return 0 if ok 4913 */ 4914 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4915 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4916 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 4917 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4918 } 4919 4920 /** 4921 * @brief Abort SSP Passkey Entry/Pairing 4922 * @param addr 4923 * @param pin 4924 * @return 0 if ok 4925 */ 4926 int gap_ssp_passkey_negative(bd_addr_t addr){ 4927 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4928 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 4929 } 4930 4931 /** 4932 * @brief Accept SSP Numeric Comparison 4933 * @param addr 4934 * @param passkey 4935 * @return 0 if ok 4936 */ 4937 int gap_ssp_confirmation_response(bd_addr_t addr){ 4938 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4939 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 4940 } 4941 4942 /** 4943 * @brief Abort SSP Numeric Comparison/Pairing 4944 * @param addr 4945 * @param pin 4946 * @return 0 if ok 4947 */ 4948 int gap_ssp_confirmation_negative(bd_addr_t addr){ 4949 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4950 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 4951 } 4952 4953 /** 4954 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4955 * @param inquiry_mode see bluetooth_defines.h 4956 */ 4957 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4958 hci_stack->inquiry_mode = mode; 4959 } 4960 4961 /** 4962 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4963 */ 4964 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4965 hci_stack->sco_voice_setting = voice_setting; 4966 } 4967 4968 /** 4969 * @brief Get SCO Voice Setting 4970 * @return current voice setting 4971 */ 4972 uint16_t hci_get_sco_voice_setting(void){ 4973 return hci_stack->sco_voice_setting; 4974 } 4975 4976 #ifdef ENABLE_CLASSIC 4977 static int hci_have_usb_transport(void){ 4978 if (!hci_stack->hci_transport) return 0; 4979 const char * transport_name = hci_stack->hci_transport->name; 4980 if (!transport_name) return 0; 4981 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 4982 } 4983 #endif 4984 4985 /** @brief Get SCO packet length for current SCO Voice setting 4986 * @note Using SCO packets of the exact length is required for USB transfer 4987 * @return Length of SCO packets in bytes (not audio frames) 4988 */ 4989 int hci_get_sco_packet_length(void){ 4990 int sco_packet_length = 0; 4991 4992 #ifdef ENABLE_CLASSIC 4993 #ifdef ENABLE_SCO_OVER_HCI 4994 4995 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 4996 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 4997 4998 if (hci_have_usb_transport()){ 4999 // see Core Spec for H2 USB Transfer. 5000 // 3 byte SCO header + 24 bytes per connection 5001 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5002 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5003 } else { 5004 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5005 sco_packet_length = 3 + 60 * multiplier; 5006 // assert that it still fits inside an SCO buffer 5007 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5008 sco_packet_length = 3 + 60; 5009 } 5010 } 5011 #endif 5012 #endif 5013 return sco_packet_length; 5014 } 5015 5016 /** 5017 * @brief Sets the master/slave policy 5018 * @param policy (0: attempt to become master, 1: let connecting device decide) 5019 */ 5020 void hci_set_master_slave_policy(uint8_t policy){ 5021 hci_stack->master_slave_policy = policy; 5022 } 5023 5024 #endif 5025 5026 HCI_STATE hci_get_state(void){ 5027 return hci_stack->state; 5028 } 5029 5030 5031 /** 5032 * @brief Set callback for Bluetooth Hardware Error 5033 */ 5034 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5035 hci_stack->hardware_error_callback = fn; 5036 } 5037 5038 void hci_disconnect_all(void){ 5039 btstack_linked_list_iterator_t it; 5040 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5041 while (btstack_linked_list_iterator_has_next(&it)){ 5042 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5043 if (con->state == SENT_DISCONNECT) continue; 5044 con->state = SEND_DISCONNECT; 5045 } 5046 hci_run(); 5047 } 5048 5049 uint16_t hci_get_manufacturer(void){ 5050 return hci_stack->manufacturer; 5051 } 5052 5053 #ifdef ENABLE_BLE 5054 5055 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5056 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5057 if (!hci_con) return NULL; 5058 return &hci_con->sm_connection; 5059 } 5060 5061 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5062 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5063 5064 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5065 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5066 if (!sm_conn) return 0; // wrong connection 5067 if (!sm_conn->sm_connection_encrypted) return 0; 5068 return sm_conn->sm_actual_encryption_key_size; 5069 } 5070 5071 int gap_authenticated(hci_con_handle_t con_handle){ 5072 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5073 if (!sm_conn) return 0; // wrong connection 5074 if (!sm_conn->sm_connection_encrypted) return 0; // unencrypted connection cannot be authenticated 5075 return sm_conn->sm_connection_authenticated; 5076 } 5077 5078 int gap_secure_connection(hci_con_handle_t con_handle){ 5079 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5080 if (!sm_conn) return 0; // wrong connection 5081 if (!sm_conn->sm_connection_encrypted) return 0; // unencrypted connection cannot be authenticated 5082 return sm_conn->sm_connection_sc; 5083 } 5084 5085 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5086 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5087 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5088 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5089 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5090 return sm_conn->sm_connection_authorization_state; 5091 } 5092 #endif 5093 5094 #ifdef ENABLE_CLASSIC 5095 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){ 5096 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5097 if (!conn) return GAP_CONNECTION_INVALID; 5098 conn->sniff_min_interval = sniff_min_interval; 5099 conn->sniff_max_interval = sniff_max_interval; 5100 conn->sniff_attempt = sniff_attempt; 5101 conn->sniff_timeout = sniff_timeout; 5102 hci_run(); 5103 return 0; 5104 } 5105 5106 /** 5107 * @brief Exit Sniff mode 5108 * @param con_handle 5109 @ @return 0 if ok 5110 */ 5111 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5112 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5113 if (!conn) return GAP_CONNECTION_INVALID; 5114 conn->sniff_min_interval = 0xffff; 5115 hci_run(); 5116 return 0; 5117 } 5118 #endif 5119 5120 void hci_halting_defer(void){ 5121 if (hci_stack->state != HCI_STATE_HALTING) return; 5122 switch (hci_stack->substate){ 5123 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5124 case HCI_HALTING_CLOSE: 5125 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5126 break; 5127 default: 5128 break; 5129 } 5130 } 5131