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_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 147 static void hci_emit_nr_connections_changed(void); 148 static void hci_emit_hci_open_failed(void); 149 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 150 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 151 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 152 static void hci_run(void); 153 static int hci_is_le_connection(hci_connection_t * connection); 154 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 155 156 #ifdef ENABLE_BLE 157 #ifdef ENABLE_LE_CENTRAL 158 // called from test/ble_client/advertising_data_parser.c 159 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 160 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 161 static hci_connection_t * gap_get_outgoing_connection(void); 162 #endif 163 #endif 164 165 // the STACK is here 166 #ifndef HAVE_MALLOC 167 static hci_stack_t hci_stack_static; 168 #endif 169 static hci_stack_t * hci_stack = NULL; 170 171 #ifdef ENABLE_CLASSIC 172 // default name 173 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 174 175 // test helper 176 static uint8_t disable_l2cap_timeouts = 0; 177 #endif 178 179 /** 180 * create connection for given address 181 * 182 * @return connection OR NULL, if no memory left 183 */ 184 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 185 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 186 hci_connection_t * conn = btstack_memory_hci_connection_get(); 187 if (!conn) return NULL; 188 memset(conn, 0, sizeof(hci_connection_t)); 189 bd_addr_copy(conn->address, addr); 190 conn->address_type = addr_type; 191 conn->con_handle = 0xffff; 192 conn->authentication_flags = AUTH_FLAGS_NONE; 193 conn->bonding_flags = 0; 194 conn->requested_security_level = LEVEL_0; 195 #ifdef ENABLE_CLASSIC 196 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 197 btstack_run_loop_set_timer_context(&conn->timeout, conn); 198 hci_connection_timestamp(conn); 199 #endif 200 conn->acl_recombination_length = 0; 201 conn->acl_recombination_pos = 0; 202 conn->num_acl_packets_sent = 0; 203 conn->num_sco_packets_sent = 0; 204 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 205 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 206 return conn; 207 } 208 209 210 /** 211 * get le connection parameter range 212 * 213 * @return le connection parameter range struct 214 */ 215 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 216 *range = hci_stack->le_connection_parameter_range; 217 } 218 219 /** 220 * set le connection parameter range 221 * 222 */ 223 224 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 225 hci_stack->le_connection_parameter_range = *range; 226 } 227 228 /** 229 * @brief Test if connection parameters are inside in existing rage 230 * @param conn_interval_min (unit: 1.25ms) 231 * @param conn_interval_max (unit: 1.25ms) 232 * @param conn_latency 233 * @param supervision_timeout (unit: 10ms) 234 * @returns 1 if included 235 */ 236 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 237 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 238 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 239 240 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 241 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 242 243 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 244 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 245 246 return 1; 247 } 248 249 /** 250 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 251 * @note: default: 1 252 * @param max_peripheral_connections 253 */ 254 #ifdef ENABLE_LE_PERIPHERAL 255 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 256 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 257 } 258 #endif 259 260 /** 261 * get hci connections iterator 262 * 263 * @return hci connections iterator 264 */ 265 266 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 267 btstack_linked_list_iterator_init(it, &hci_stack->connections); 268 } 269 270 /** 271 * get connection for a given handle 272 * 273 * @return connection OR NULL, if not found 274 */ 275 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 276 btstack_linked_list_iterator_t it; 277 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 278 while (btstack_linked_list_iterator_has_next(&it)){ 279 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 280 if ( item->con_handle == con_handle ) { 281 return item; 282 } 283 } 284 return NULL; 285 } 286 287 /** 288 * get connection for given address 289 * 290 * @return connection OR NULL, if not found 291 */ 292 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 293 btstack_linked_list_iterator_t it; 294 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 295 while (btstack_linked_list_iterator_has_next(&it)){ 296 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 297 if (connection->address_type != addr_type) continue; 298 if (memcmp(addr, connection->address, 6) != 0) continue; 299 return connection; 300 } 301 return NULL; 302 } 303 304 305 #ifdef ENABLE_CLASSIC 306 307 #ifdef ENABLE_SCO_OVER_HCI 308 static int hci_number_sco_connections(void){ 309 int connections = 0; 310 btstack_linked_list_iterator_t it; 311 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 312 while (btstack_linked_list_iterator_has_next(&it)){ 313 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 314 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 315 connections++; 316 } 317 return connections; 318 } 319 #endif 320 321 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 322 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 323 #ifdef HAVE_EMBEDDED_TICK 324 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 325 // connections might be timed out 326 hci_emit_l2cap_check_timeout(connection); 327 } 328 #else 329 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 330 // connections might be timed out 331 hci_emit_l2cap_check_timeout(connection); 332 } 333 #endif 334 } 335 336 static void hci_connection_timestamp(hci_connection_t *connection){ 337 #ifdef HAVE_EMBEDDED_TICK 338 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 339 #else 340 connection->timestamp = btstack_run_loop_get_time_ms(); 341 #endif 342 } 343 344 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 345 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 346 } 347 348 349 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 350 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 351 } 352 353 /** 354 * add authentication flags and reset timer 355 * @note: assumes classic connection 356 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 357 */ 358 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 359 bd_addr_t addr; 360 reverse_bd_addr(bd_addr, addr); 361 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 362 if (conn) { 363 connectionSetAuthenticationFlags(conn, flags); 364 hci_connection_timestamp(conn); 365 } 366 } 367 368 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 369 hci_connection_t * conn = hci_connection_for_handle(handle); 370 if (!conn) return 0; 371 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 372 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 373 return 0; 374 } 375 376 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 377 if (!hci_stack->link_key_db) return; 378 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 379 hci_stack->link_key_db->delete_link_key(addr); 380 } 381 382 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 383 if (!hci_stack->link_key_db) return; 384 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 385 hci_stack->link_key_db->put_link_key(addr, link_key, type); 386 } 387 388 void gap_delete_all_link_keys(void){ 389 bd_addr_t addr; 390 link_key_t link_key; 391 link_key_type_t type; 392 btstack_link_key_iterator_t it; 393 int ok = gap_link_key_iterator_init(&it); 394 if (!ok) { 395 log_error("could not initialize iterator"); 396 return; 397 } 398 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 399 gap_drop_link_key_for_bd_addr(addr); 400 } 401 gap_link_key_iterator_done(&it); 402 } 403 404 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 405 if (!hci_stack->link_key_db) return 0; 406 if (!hci_stack->link_key_db->iterator_init) return 0; 407 return hci_stack->link_key_db->iterator_init(it); 408 } 409 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 410 if (!hci_stack->link_key_db) return 0; 411 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 412 } 413 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 414 if (!hci_stack->link_key_db) return; 415 hci_stack->link_key_db->iterator_done(it); 416 } 417 #endif 418 419 static int hci_is_le_connection(hci_connection_t * connection){ 420 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 421 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 422 } 423 424 /** 425 * count connections 426 */ 427 static int nr_hci_connections(void){ 428 int count = 0; 429 btstack_linked_item_t *it; 430 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 431 return count; 432 } 433 434 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 435 436 unsigned int num_packets_sent_classic = 0; 437 unsigned int num_packets_sent_le = 0; 438 439 btstack_linked_item_t *it; 440 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 441 hci_connection_t * connection = (hci_connection_t *) it; 442 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 443 num_packets_sent_classic += connection->num_acl_packets_sent; 444 } else { 445 num_packets_sent_le += connection->num_acl_packets_sent; 446 } 447 } 448 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 449 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 450 int free_slots_le = 0; 451 452 if (free_slots_classic < 0){ 453 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 454 return 0; 455 } 456 457 if (hci_stack->le_acl_packets_total_num){ 458 // if we have LE slots, they are used 459 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 460 if (free_slots_le < 0){ 461 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 462 return 0; 463 } 464 } else { 465 // otherwise, classic slots are used for LE, too 466 free_slots_classic -= num_packets_sent_le; 467 if (free_slots_classic < 0){ 468 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 469 return 0; 470 } 471 } 472 473 switch (address_type){ 474 case BD_ADDR_TYPE_UNKNOWN: 475 log_error("hci_number_free_acl_slots: unknown address type"); 476 return 0; 477 478 case BD_ADDR_TYPE_CLASSIC: 479 return free_slots_classic; 480 481 default: 482 if (hci_stack->le_acl_packets_total_num){ 483 return free_slots_le; 484 } 485 return free_slots_classic; 486 } 487 } 488 489 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 490 // get connection type 491 hci_connection_t * connection = hci_connection_for_handle(con_handle); 492 if (!connection){ 493 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 494 return 0; 495 } 496 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 497 } 498 499 #ifdef ENABLE_CLASSIC 500 static int hci_number_free_sco_slots(void){ 501 unsigned int num_sco_packets_sent = 0; 502 btstack_linked_item_t *it; 503 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 504 hci_connection_t * connection = (hci_connection_t *) it; 505 num_sco_packets_sent += connection->num_sco_packets_sent; 506 } 507 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 508 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 509 return 0; 510 } 511 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 512 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 513 } 514 #endif 515 516 // only used to send HCI Host Number Completed Packets 517 static int hci_can_send_comand_packet_transport(void){ 518 if (hci_stack->hci_packet_buffer_reserved) return 0; 519 520 // check for async hci transport implementations 521 if (hci_stack->hci_transport->can_send_packet_now){ 522 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 523 return 0; 524 } 525 } 526 return 1; 527 } 528 529 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 530 int hci_can_send_command_packet_now(void){ 531 if (hci_can_send_comand_packet_transport() == 0) return 0; 532 return hci_stack->num_cmd_packets > 0; 533 } 534 535 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 536 // check for async hci transport implementations 537 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 538 return hci_stack->hci_transport->can_send_packet_now(packet_type); 539 } 540 541 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 542 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 543 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 544 } 545 546 int hci_can_send_acl_le_packet_now(void){ 547 if (hci_stack->hci_packet_buffer_reserved) return 0; 548 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 549 } 550 551 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 552 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 553 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 554 } 555 556 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 557 if (hci_stack->hci_packet_buffer_reserved) return 0; 558 return hci_can_send_prepared_acl_packet_now(con_handle); 559 } 560 561 #ifdef ENABLE_CLASSIC 562 int hci_can_send_acl_classic_packet_now(void){ 563 if (hci_stack->hci_packet_buffer_reserved) return 0; 564 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 565 } 566 567 int hci_can_send_prepared_sco_packet_now(void){ 568 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 569 if (!hci_stack->synchronous_flow_control_enabled) return 1; 570 return hci_number_free_sco_slots() > 0; 571 } 572 573 int hci_can_send_sco_packet_now(void){ 574 if (hci_stack->hci_packet_buffer_reserved) return 0; 575 return hci_can_send_prepared_sco_packet_now(); 576 } 577 578 void hci_request_sco_can_send_now_event(void){ 579 hci_stack->sco_waiting_for_can_send_now = 1; 580 hci_notify_if_sco_can_send_now(); 581 } 582 #endif 583 584 // used for internal checks in l2cap.c 585 int hci_is_packet_buffer_reserved(void){ 586 return hci_stack->hci_packet_buffer_reserved; 587 } 588 589 // reserves outgoing packet buffer. @returns 1 if successful 590 int hci_reserve_packet_buffer(void){ 591 if (hci_stack->hci_packet_buffer_reserved) { 592 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 593 return 0; 594 } 595 hci_stack->hci_packet_buffer_reserved = 1; 596 return 1; 597 } 598 599 void hci_release_packet_buffer(void){ 600 hci_stack->hci_packet_buffer_reserved = 0; 601 } 602 603 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 604 static int hci_transport_synchronous(void){ 605 return hci_stack->hci_transport->can_send_packet_now == NULL; 606 } 607 608 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 609 610 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 611 612 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 613 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 614 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 615 max_acl_data_packet_length = hci_stack->le_data_packets_length; 616 } 617 618 // testing: reduce buffer to minimum 619 // max_acl_data_packet_length = 52; 620 621 log_debug("hci_send_acl_packet_fragments entered"); 622 623 int err; 624 // multiple packets could be send on a synchronous HCI transport 625 while (1){ 626 627 log_debug("hci_send_acl_packet_fragments loop entered"); 628 629 // get current data 630 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 631 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 632 int more_fragments = 0; 633 634 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 635 if (current_acl_data_packet_length > max_acl_data_packet_length){ 636 more_fragments = 1; 637 current_acl_data_packet_length = max_acl_data_packet_length; 638 } 639 640 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 641 if (acl_header_pos > 0){ 642 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 643 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 644 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 645 } 646 647 // update header len 648 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 649 650 // count packet 651 connection->num_acl_packets_sent++; 652 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 653 654 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 655 if (more_fragments){ 656 // update start of next fragment to send 657 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 658 } else { 659 // done 660 hci_stack->acl_fragmentation_pos = 0; 661 hci_stack->acl_fragmentation_total_size = 0; 662 } 663 664 // send packet 665 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 666 const int size = current_acl_data_packet_length + 4; 667 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 668 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 669 670 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 671 672 // done yet? 673 if (!more_fragments) break; 674 675 // can send more? 676 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 677 } 678 679 log_debug("hci_send_acl_packet_fragments loop over"); 680 681 // release buffer now for synchronous transport 682 if (hci_transport_synchronous()){ 683 hci_release_packet_buffer(); 684 // notify upper stack that it might be possible to send again 685 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 686 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 687 } 688 689 return err; 690 } 691 692 // pre: caller has reserved the packet buffer 693 int hci_send_acl_packet_buffer(int size){ 694 695 // log_info("hci_send_acl_packet_buffer size %u", size); 696 697 if (!hci_stack->hci_packet_buffer_reserved) { 698 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 699 return 0; 700 } 701 702 uint8_t * packet = hci_stack->hci_packet_buffer; 703 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 704 705 // check for free places on Bluetooth module 706 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 707 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 708 hci_release_packet_buffer(); 709 return BTSTACK_ACL_BUFFERS_FULL; 710 } 711 712 hci_connection_t *connection = hci_connection_for_handle( con_handle); 713 if (!connection) { 714 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 715 hci_release_packet_buffer(); 716 return 0; 717 } 718 719 #ifdef ENABLE_CLASSIC 720 hci_connection_timestamp(connection); 721 #endif 722 723 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 724 725 // setup data 726 hci_stack->acl_fragmentation_total_size = size; 727 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 728 729 return hci_send_acl_packet_fragments(connection); 730 } 731 732 #ifdef ENABLE_CLASSIC 733 // pre: caller has reserved the packet buffer 734 int hci_send_sco_packet_buffer(int size){ 735 736 // log_info("hci_send_acl_packet_buffer size %u", size); 737 738 if (!hci_stack->hci_packet_buffer_reserved) { 739 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 740 return 0; 741 } 742 743 uint8_t * packet = hci_stack->hci_packet_buffer; 744 745 // skip checks in loopback mode 746 if (!hci_stack->loopback_mode){ 747 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 748 749 // check for free places on Bluetooth module 750 if (!hci_can_send_prepared_sco_packet_now()) { 751 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 752 hci_release_packet_buffer(); 753 return BTSTACK_ACL_BUFFERS_FULL; 754 } 755 756 // track send packet in connection struct 757 hci_connection_t *connection = hci_connection_for_handle( con_handle); 758 if (!connection) { 759 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 760 hci_release_packet_buffer(); 761 return 0; 762 } 763 connection->num_sco_packets_sent++; 764 } 765 766 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 767 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 768 769 if (hci_transport_synchronous()){ 770 hci_release_packet_buffer(); 771 // notify upper stack that it might be possible to send again 772 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 773 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 774 } 775 776 return err; 777 } 778 #endif 779 780 static void acl_handler(uint8_t *packet, int size){ 781 782 // log_info("acl_handler: size %u", size); 783 784 // get info 785 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 786 hci_connection_t *conn = hci_connection_for_handle(con_handle); 787 uint8_t acl_flags = READ_ACL_FLAGS(packet); 788 uint16_t acl_length = READ_ACL_LENGTH(packet); 789 790 // ignore non-registered handle 791 if (!conn){ 792 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 793 return; 794 } 795 796 // assert packet is complete 797 if (acl_length + 4 != size){ 798 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 799 return; 800 } 801 802 #ifdef ENABLE_CLASSIC 803 // update idle timestamp 804 hci_connection_timestamp(conn); 805 #endif 806 807 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 808 hci_stack->host_completed_packets = 1; 809 conn->num_packets_completed++; 810 #endif 811 812 // handle different packet types 813 switch (acl_flags & 0x03) { 814 815 case 0x01: // continuation fragment 816 817 // sanity checks 818 if (conn->acl_recombination_pos == 0) { 819 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 820 return; 821 } 822 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 823 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 824 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 825 conn->acl_recombination_pos = 0; 826 return; 827 } 828 829 // append fragment payload (header already stored) 830 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 831 conn->acl_recombination_pos += acl_length; 832 833 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 834 // conn->acl_recombination_pos, conn->acl_recombination_length); 835 836 // forward complete L2CAP packet if complete. 837 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 838 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 839 // reset recombination buffer 840 conn->acl_recombination_length = 0; 841 conn->acl_recombination_pos = 0; 842 } 843 break; 844 845 case 0x02: { // first fragment 846 847 // sanity check 848 if (conn->acl_recombination_pos) { 849 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 850 conn->acl_recombination_pos = 0; 851 } 852 853 // peek into L2CAP packet! 854 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 855 856 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 857 858 // compare fragment size to L2CAP packet size 859 if (acl_length >= l2cap_length + 4){ 860 // forward fragment as L2CAP packet 861 hci_emit_acl_packet(packet, acl_length + 4); 862 } else { 863 864 if (acl_length > HCI_ACL_BUFFER_SIZE){ 865 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 866 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 867 return; 868 } 869 870 // store first fragment and tweak acl length for complete package 871 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 872 conn->acl_recombination_pos = acl_length + 4; 873 conn->acl_recombination_length = l2cap_length; 874 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 875 } 876 break; 877 878 } 879 default: 880 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 881 return; 882 } 883 884 // execute main loop 885 hci_run(); 886 } 887 888 static void hci_shutdown_connection(hci_connection_t *conn){ 889 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 890 891 #ifdef ENABLE_CLASSIC 892 #ifdef ENABLE_SCO_OVER_HCI 893 int addr_type = conn->address_type; 894 #endif 895 #endif 896 897 btstack_run_loop_remove_timer(&conn->timeout); 898 899 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 900 btstack_memory_hci_connection_free( conn ); 901 902 // now it's gone 903 hci_emit_nr_connections_changed(); 904 905 #ifdef ENABLE_CLASSIC 906 #ifdef ENABLE_SCO_OVER_HCI 907 // update SCO 908 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 909 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 910 } 911 #endif 912 #endif 913 } 914 915 #ifdef ENABLE_CLASSIC 916 917 static const uint16_t packet_type_sizes[] = { 918 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 919 HCI_ACL_DH1_SIZE, 0, 0, 0, 920 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 921 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 922 }; 923 static const uint8_t packet_type_feature_requirement_bit[] = { 924 0, // 3 slot packets 925 1, // 5 slot packets 926 25, // EDR 2 mpbs 927 26, // EDR 3 mbps 928 39, // 3 slot EDR packts 929 40, // 5 slot EDR packet 930 }; 931 static const uint16_t packet_type_feature_packet_mask[] = { 932 0x0f00, // 3 slot packets 933 0xf000, // 5 slot packets 934 0x1102, // EDR 2 mpbs 935 0x2204, // EDR 3 mbps 936 0x0300, // 3 slot EDR packts 937 0x3000, // 5 slot EDR packet 938 }; 939 940 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 941 // enable packet types based on size 942 uint16_t packet_types = 0; 943 unsigned int i; 944 for (i=0;i<16;i++){ 945 if (packet_type_sizes[i] == 0) continue; 946 if (packet_type_sizes[i] <= buffer_size){ 947 packet_types |= 1 << i; 948 } 949 } 950 // disable packet types due to missing local supported features 951 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 952 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 953 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 954 if (feature_set) continue; 955 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 956 packet_types &= ~packet_type_feature_packet_mask[i]; 957 } 958 // flip bits for "may not be used" 959 packet_types ^= 0x3306; 960 return packet_types; 961 } 962 963 uint16_t hci_usable_acl_packet_types(void){ 964 return hci_stack->packet_types; 965 } 966 #endif 967 968 uint8_t* hci_get_outgoing_packet_buffer(void){ 969 // hci packet buffer is >= acl data packet length 970 return hci_stack->hci_packet_buffer; 971 } 972 973 uint16_t hci_max_acl_data_packet_length(void){ 974 return hci_stack->acl_data_packet_length; 975 } 976 977 #ifdef ENABLE_CLASSIC 978 int hci_extended_sco_link_supported(void){ 979 // No. 31, byte 3, bit 7 980 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 981 } 982 #endif 983 984 int hci_non_flushable_packet_boundary_flag_supported(void){ 985 // No. 54, byte 6, bit 6 986 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 987 } 988 989 static int gap_ssp_supported(void){ 990 // No. 51, byte 6, bit 3 991 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 992 } 993 994 static int hci_classic_supported(void){ 995 #ifdef ENABLE_CLASSIC 996 // No. 37, byte 4, bit 5, = No BR/EDR Support 997 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 998 #else 999 return 0; 1000 #endif 1001 } 1002 1003 static int hci_le_supported(void){ 1004 #ifdef ENABLE_BLE 1005 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1006 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1007 #else 1008 return 0; 1009 #endif 1010 } 1011 1012 #ifdef ENABLE_BLE 1013 1014 /** 1015 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1016 */ 1017 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1018 *addr_type = hci_stack->le_own_addr_type; 1019 if (hci_stack->le_own_addr_type){ 1020 memcpy(addr, hci_stack->le_random_address, 6); 1021 } else { 1022 memcpy(addr, hci_stack->local_bd_addr, 6); 1023 } 1024 } 1025 1026 #ifdef ENABLE_LE_CENTRAL 1027 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1028 1029 int offset = 3; 1030 int num_reports = packet[offset]; 1031 offset += 1; 1032 1033 int i; 1034 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1035 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1036 for (i=0; i<num_reports && offset < size;i++){ 1037 uint8_t data_length = btstack_min( packet[offset + 8], LE_ADVERTISING_DATA_SIZE); 1038 uint8_t event_size = 10 + data_length; 1039 int pos = 0; 1040 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1041 event[pos++] = event_size; 1042 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 1043 offset += 8; 1044 pos += 8; 1045 event[pos++] = packet[offset + 1 + data_length]; // rssi 1046 event[pos++] = packet[offset++]; //data_length; 1047 memcpy(&event[pos], &packet[offset], data_length); 1048 pos += data_length; 1049 offset += data_length + 1; // rssi 1050 hci_emit_event(event, pos, 1); 1051 } 1052 } 1053 #endif 1054 #endif 1055 1056 #ifdef ENABLE_BLE 1057 #ifdef ENABLE_LE_PERIPHERAL 1058 static void hci_reenable_advertisements_if_needed(void){ 1059 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1060 // get number of active le slave connections 1061 int num_slave_connections = 0; 1062 btstack_linked_list_iterator_t it; 1063 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1064 while (btstack_linked_list_iterator_has_next(&it)){ 1065 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1066 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1067 if (con->state != OPEN) continue; 1068 if (con->role != HCI_ROLE_SLAVE) continue; 1069 if (!hci_is_le_connection(con)) continue; 1070 num_slave_connections++; 1071 } 1072 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1073 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1074 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1075 } 1076 } 1077 } 1078 #endif 1079 #endif 1080 1081 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1082 1083 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1084 if (!hci_stack->config) return 0; 1085 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1086 // Limit baud rate for Broadcom chipsets to 3 mbps 1087 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 1088 baud_rate = 3000000; 1089 } 1090 return baud_rate; 1091 } 1092 1093 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1094 UNUSED(ds); 1095 1096 switch (hci_stack->substate){ 1097 case HCI_INIT_W4_SEND_RESET: 1098 log_info("Resend HCI Reset"); 1099 hci_stack->substate = HCI_INIT_SEND_RESET; 1100 hci_stack->num_cmd_packets = 1; 1101 hci_run(); 1102 break; 1103 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1104 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1105 if (hci_stack->hci_transport->reset_link){ 1106 hci_stack->hci_transport->reset_link(); 1107 } 1108 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1109 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1110 log_info("Resend HCI Reset - CSR Warm Boot"); 1111 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1112 hci_stack->num_cmd_packets = 1; 1113 hci_run(); 1114 break; 1115 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1116 if (hci_stack->hci_transport->set_baudrate){ 1117 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1118 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1119 hci_stack->hci_transport->set_baudrate(baud_rate); 1120 } 1121 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1122 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1123 if (hci_stack->hci_transport->reset_link){ 1124 log_info("Link Reset"); 1125 hci_stack->hci_transport->reset_link(); 1126 } 1127 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1128 hci_run(); 1129 } 1130 break; 1131 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1132 // otherwise continue 1133 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1134 hci_send_cmd(&hci_read_local_supported_commands); 1135 break; 1136 default: 1137 break; 1138 } 1139 } 1140 #endif 1141 1142 static void hci_initializing_next_state(void){ 1143 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1144 } 1145 1146 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_PERIPHERAL) 1147 static void hci_replace_bd_addr_placeholder(uint8_t * data, uint16_t size){ 1148 const int bd_addr_string_len = 17; 1149 int i = 0; 1150 while (i < size - bd_addr_string_len){ 1151 if (memcmp(&data[i], "00:00:00:00:00:00", bd_addr_string_len)) { 1152 i++; 1153 continue; 1154 } 1155 // set real address 1156 memcpy(&data[i], bd_addr_to_str(hci_stack->local_bd_addr), bd_addr_string_len); 1157 i += bd_addr_string_len; 1158 } 1159 } 1160 #endif 1161 1162 // assumption: hci_can_send_command_packet_now() == true 1163 static void hci_initializing_run(void){ 1164 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1165 switch (hci_stack->substate){ 1166 case HCI_INIT_SEND_RESET: 1167 hci_state_reset(); 1168 1169 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1170 // prepare reset if command complete not received in 100ms 1171 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1172 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1173 btstack_run_loop_add_timer(&hci_stack->timeout); 1174 #endif 1175 // send command 1176 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1177 hci_send_cmd(&hci_reset); 1178 break; 1179 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1180 hci_send_cmd(&hci_read_local_version_information); 1181 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1182 break; 1183 case HCI_INIT_SEND_READ_LOCAL_NAME: 1184 hci_send_cmd(&hci_read_local_name); 1185 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1186 break; 1187 1188 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1189 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1190 hci_state_reset(); 1191 // prepare reset if command complete not received in 100ms 1192 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1193 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1194 btstack_run_loop_add_timer(&hci_stack->timeout); 1195 // send command 1196 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1197 hci_send_cmd(&hci_reset); 1198 break; 1199 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1200 hci_state_reset(); 1201 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1202 hci_send_cmd(&hci_reset); 1203 break; 1204 case HCI_INIT_SEND_BAUD_CHANGE: { 1205 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1206 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1207 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1208 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1209 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1210 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1211 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1212 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1213 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1214 btstack_run_loop_add_timer(&hci_stack->timeout); 1215 } 1216 break; 1217 } 1218 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1219 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1220 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1221 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1222 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1223 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1224 break; 1225 } 1226 case HCI_INIT_CUSTOM_INIT: 1227 // Custom initialization 1228 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1229 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1230 if (valid_cmd){ 1231 int size = 3 + hci_stack->hci_packet_buffer[2]; 1232 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1233 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1234 switch (valid_cmd) { 1235 case BTSTACK_CHIPSET_VALID_COMMAND: 1236 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1237 break; 1238 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1239 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1240 log_info("CSR Warm Boot"); 1241 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1242 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1243 btstack_run_loop_add_timer(&hci_stack->timeout); 1244 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1245 && hci_stack->config 1246 && hci_stack->chipset 1247 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1248 && hci_stack->hci_transport->set_baudrate 1249 && hci_transport_uart_get_main_baud_rate()){ 1250 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1251 } else { 1252 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1253 } 1254 break; 1255 default: 1256 // should not get here 1257 break; 1258 } 1259 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1260 break; 1261 } 1262 log_info("Init script done"); 1263 1264 // Init script download on Broadcom chipsets causes: 1265 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION 1266 || hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA){ 1267 1268 // - baud rate to reset, restore UART baud rate if needed 1269 int need_baud_change = hci_stack->config 1270 && hci_stack->chipset 1271 && hci_stack->chipset->set_baudrate_command 1272 && hci_stack->hci_transport->set_baudrate 1273 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1274 if (need_baud_change) { 1275 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1276 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1277 hci_stack->hci_transport->set_baudrate(baud_rate); 1278 } 1279 1280 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1281 // -> Work around: wait a few milliseconds here. 1282 log_info("BCM delay after init script"); 1283 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1284 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1285 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1286 btstack_run_loop_add_timer(&hci_stack->timeout); 1287 break; 1288 } 1289 } 1290 // otherwise continue 1291 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1292 hci_send_cmd(&hci_read_local_supported_commands); 1293 break; 1294 case HCI_INIT_SET_BD_ADDR: 1295 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1296 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1297 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1298 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1299 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1300 break; 1301 #endif 1302 1303 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1304 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1305 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1306 hci_send_cmd(&hci_read_local_supported_commands); 1307 break; 1308 case HCI_INIT_READ_BD_ADDR: 1309 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1310 hci_send_cmd(&hci_read_bd_addr); 1311 break; 1312 case HCI_INIT_READ_BUFFER_SIZE: 1313 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1314 hci_send_cmd(&hci_read_buffer_size); 1315 break; 1316 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1317 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1318 hci_send_cmd(&hci_read_local_supported_features); 1319 break; 1320 1321 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1322 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1323 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1324 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1325 break; 1326 case HCI_INIT_HOST_BUFFER_SIZE: 1327 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1328 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1329 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1330 break; 1331 #endif 1332 1333 case HCI_INIT_SET_EVENT_MASK: 1334 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1335 if (hci_le_supported()){ 1336 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1337 } else { 1338 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1339 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1340 } 1341 break; 1342 1343 #ifdef ENABLE_CLASSIC 1344 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1345 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1346 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1347 break; 1348 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1349 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1350 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1351 break; 1352 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1353 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1354 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1355 break; 1356 case HCI_INIT_WRITE_LOCAL_NAME: { 1357 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1358 hci_reserve_packet_buffer(); 1359 uint8_t * packet = hci_stack->hci_packet_buffer; 1360 // construct HCI Command and send 1361 uint16_t opcode = hci_write_local_name.opcode; 1362 hci_stack->last_cmd_opcode = opcode; 1363 packet[0] = opcode & 0xff; 1364 packet[1] = opcode >> 8; 1365 packet[2] = DEVICE_NAME_LEN; 1366 memset(&packet[3], 0, DEVICE_NAME_LEN); 1367 memcpy(&packet[3], hci_stack->local_name, strlen(hci_stack->local_name)); 1368 // expand '00:00:00:00:00:00' in name with bd_addr 1369 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1370 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1371 break; 1372 } 1373 case HCI_INIT_WRITE_EIR_DATA: { 1374 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1375 hci_reserve_packet_buffer(); 1376 uint8_t * packet = hci_stack->hci_packet_buffer; 1377 // construct HCI Command and send 1378 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1379 hci_stack->last_cmd_opcode = opcode; 1380 packet[0] = opcode & 0xff; 1381 packet[1] = opcode >> 8; 1382 packet[2] = 1 + 240; 1383 packet[3] = 0; // FEC not required 1384 if (hci_stack->eir_data){ 1385 memcpy(&packet[4], hci_stack->eir_data, 240); 1386 } else { 1387 memset(&packet[4], 0, 240); 1388 int name_len = strlen(hci_stack->local_name); 1389 packet[4] = name_len + 1; 1390 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1391 memcpy(&packet[6], hci_stack->local_name, name_len); 1392 } 1393 // expand '00:00:00:00:00:00' in name with bd_addr 1394 hci_replace_bd_addr_placeholder(&packet[4], 240); 1395 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1396 break; 1397 } 1398 case HCI_INIT_WRITE_INQUIRY_MODE: 1399 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1400 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1401 break; 1402 case HCI_INIT_WRITE_SCAN_ENABLE: 1403 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1404 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1405 break; 1406 // only sent if ENABLE_SCO_OVER_HCI is defined 1407 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1408 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1409 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1410 break; 1411 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1412 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1413 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1414 break; 1415 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1416 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1417 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1418 log_info("BCM: Route SCO data via HCI transport"); 1419 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1420 break; 1421 1422 #endif 1423 #ifdef ENABLE_BLE 1424 // LE INIT 1425 case HCI_INIT_LE_READ_BUFFER_SIZE: 1426 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1427 hci_send_cmd(&hci_le_read_buffer_size); 1428 break; 1429 case HCI_INIT_LE_SET_EVENT_MASK: 1430 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1431 hci_send_cmd(&hci_le_set_event_mask, 0x1FF, 0x0); 1432 break; 1433 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1434 // LE Supported Host = 1, Simultaneous Host = 0 1435 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1436 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1437 break; 1438 #endif 1439 1440 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1441 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1442 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1443 hci_send_cmd(&hci_le_read_maximum_data_length); 1444 break; 1445 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1446 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1447 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1448 break; 1449 #endif 1450 1451 #ifdef ENABLE_LE_CENTRAL 1452 case HCI_INIT_READ_WHITE_LIST_SIZE: 1453 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1454 hci_send_cmd(&hci_le_read_white_list_size); 1455 break; 1456 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1457 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1458 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1459 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1460 break; 1461 #endif 1462 default: 1463 return; 1464 } 1465 } 1466 1467 static void hci_init_done(void){ 1468 // done. tell the app 1469 log_info("hci_init_done -> HCI_STATE_WORKING"); 1470 hci_stack->state = HCI_STATE_WORKING; 1471 hci_emit_state(); 1472 hci_run(); 1473 } 1474 1475 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1476 1477 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1478 1479 uint8_t command_completed = 0; 1480 1481 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1482 uint16_t opcode = little_endian_read_16(packet,3); 1483 if (opcode == hci_stack->last_cmd_opcode){ 1484 command_completed = 1; 1485 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1486 } else { 1487 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1488 } 1489 } 1490 1491 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1492 uint8_t status = packet[2]; 1493 uint16_t opcode = little_endian_read_16(packet,4); 1494 if (opcode == hci_stack->last_cmd_opcode){ 1495 if (status){ 1496 command_completed = 1; 1497 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1498 } else { 1499 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1500 } 1501 } else { 1502 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1503 } 1504 } 1505 1506 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1507 1508 // Vendor == CSR 1509 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1510 // TODO: track actual command 1511 command_completed = 1; 1512 } 1513 1514 // Vendor == Toshiba 1515 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1516 // TODO: track actual command 1517 command_completed = 1; 1518 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1519 hci_stack->num_cmd_packets = 1; 1520 } 1521 1522 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1523 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1524 // 1525 // HCI Reset 1526 // Timeout 100 ms 1527 // HCI Reset 1528 // Command Complete Reset 1529 // HCI Read Local Version Information 1530 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1531 // hang... 1532 // 1533 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1534 if (!command_completed 1535 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1536 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1537 1538 uint16_t opcode = little_endian_read_16(packet,3); 1539 if (opcode == hci_reset.opcode){ 1540 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1541 return; 1542 } 1543 } 1544 1545 // CSR & H5 1546 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1547 if (!command_completed 1548 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1549 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1550 1551 uint16_t opcode = little_endian_read_16(packet,3); 1552 if (opcode == hci_reset.opcode){ 1553 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1554 return; 1555 } 1556 } 1557 1558 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1559 // fix: Correct substate and behave as command below 1560 if (command_completed){ 1561 switch (hci_stack->substate){ 1562 case HCI_INIT_SEND_RESET: 1563 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1564 break; 1565 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1566 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1567 break; 1568 default: 1569 break; 1570 } 1571 } 1572 1573 #endif 1574 1575 if (!command_completed) return; 1576 1577 int need_baud_change = 0; 1578 int need_addr_change = 0; 1579 1580 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1581 need_baud_change = hci_stack->config 1582 && hci_stack->chipset 1583 && hci_stack->chipset->set_baudrate_command 1584 && hci_stack->hci_transport->set_baudrate 1585 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1586 1587 need_addr_change = hci_stack->custom_bd_addr_set 1588 && hci_stack->chipset 1589 && hci_stack->chipset->set_bd_addr_command; 1590 #endif 1591 1592 switch(hci_stack->substate){ 1593 1594 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1595 case HCI_INIT_SEND_RESET: 1596 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1597 // fix: just correct substate and behave as command below 1598 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1599 btstack_run_loop_remove_timer(&hci_stack->timeout); 1600 break; 1601 case HCI_INIT_W4_SEND_RESET: 1602 btstack_run_loop_remove_timer(&hci_stack->timeout); 1603 break; 1604 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1605 log_info("Received local name, need baud change %d", need_baud_change); 1606 if (need_baud_change){ 1607 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1608 return; 1609 } 1610 // skip baud change 1611 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1612 return; 1613 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1614 // for STLC2500D, baud rate change already happened. 1615 // for others, baud rate gets changed now 1616 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1617 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1618 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1619 hci_stack->hci_transport->set_baudrate(baud_rate); 1620 } 1621 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1622 return; 1623 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1624 btstack_run_loop_remove_timer(&hci_stack->timeout); 1625 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1626 return; 1627 case HCI_INIT_W4_CUSTOM_INIT: 1628 // repeat custom init 1629 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1630 return; 1631 #else 1632 case HCI_INIT_W4_SEND_RESET: 1633 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1634 return ; 1635 #endif 1636 1637 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1638 if (need_baud_change && 1639 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1640 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1641 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1642 return; 1643 } 1644 if (need_addr_change){ 1645 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1646 return; 1647 } 1648 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1649 return; 1650 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1651 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1652 if (need_baud_change){ 1653 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1654 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1655 hci_stack->hci_transport->set_baudrate(baud_rate); 1656 } 1657 if (need_addr_change){ 1658 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1659 return; 1660 } 1661 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1662 return; 1663 case HCI_INIT_W4_SET_BD_ADDR: 1664 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1665 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1666 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1667 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1668 return; 1669 } 1670 // skipping st warm boot 1671 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1672 return; 1673 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1674 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1675 return; 1676 #endif 1677 case HCI_INIT_W4_READ_BD_ADDR: 1678 // only read buffer size if supported 1679 if (hci_stack->local_supported_commands[0] & 0x01) { 1680 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1681 return; 1682 } 1683 // skipping read buffer size 1684 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1685 return; 1686 case HCI_INIT_W4_SET_EVENT_MASK: 1687 // skip Classic init commands for LE only chipsets 1688 if (!hci_classic_supported()){ 1689 #ifdef ENABLE_BLE 1690 if (hci_le_supported()){ 1691 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1692 return; 1693 } 1694 #endif 1695 log_error("Neither BR/EDR nor LE supported"); 1696 hci_init_done(); 1697 return; 1698 } 1699 if (!gap_ssp_supported()){ 1700 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1701 return; 1702 } 1703 break; 1704 #ifdef ENABLE_BLE 1705 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1706 // skip write le host if not supported (e.g. on LE only EM9301) 1707 if (hci_stack->local_supported_commands[0] & 0x02) break; 1708 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1709 return; 1710 1711 1712 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1713 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1714 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1715 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1716 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1717 return; 1718 } 1719 // explicit fall through to reduce repetitions 1720 #endif 1721 1722 #ifdef ENABLE_LE_CENTRAL 1723 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1724 #else 1725 hci_init_done(); 1726 #endif 1727 return; 1728 #endif 1729 1730 #ifdef ENABLE_SCO_OVER_HCI 1731 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1732 // skip write synchronous flow control if not supported 1733 if (hci_stack->local_supported_commands[0] & 0x04) break; 1734 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1735 // explicit fall through to reduce repetitions 1736 1737 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1738 // skip write default erroneous data reporting if not supported 1739 if (hci_stack->local_supported_commands[0] & 0x08) break; 1740 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1741 // explicit fall through to reduce repetitions 1742 1743 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1744 // skip bcm set sco pcm config on non-Broadcom chipsets 1745 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1746 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1747 // explicit fall through to reduce repetitions 1748 1749 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1750 if (!hci_le_supported()){ 1751 // SKIP LE init for Classic only configuration 1752 hci_init_done(); 1753 return; 1754 } 1755 break; 1756 1757 #else /* !ENABLE_SCO_OVER_HCI */ 1758 1759 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1760 #ifdef ENABLE_BLE 1761 if (hci_le_supported()){ 1762 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1763 return; 1764 } 1765 #endif 1766 // SKIP LE init for Classic only configuration 1767 hci_init_done(); 1768 return; 1769 #endif /* ENABLE_SCO_OVER_HCI */ 1770 1771 // Response to command before init done state -> init done 1772 case (HCI_INIT_DONE-1): 1773 hci_init_done(); 1774 return; 1775 1776 default: 1777 break; 1778 } 1779 hci_initializing_next_state(); 1780 } 1781 1782 static void event_handler(uint8_t *packet, int size){ 1783 1784 uint16_t event_length = packet[1]; 1785 1786 // assert packet is complete 1787 if (size != event_length + 2){ 1788 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1789 return; 1790 } 1791 1792 bd_addr_t addr; 1793 bd_addr_type_t addr_type; 1794 hci_con_handle_t handle; 1795 hci_connection_t * conn; 1796 int i; 1797 #ifdef ENABLE_CLASSIC 1798 uint8_t link_type; 1799 #endif 1800 1801 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1802 1803 switch (hci_event_packet_get_type(packet)) { 1804 1805 case HCI_EVENT_COMMAND_COMPLETE: 1806 // get num cmd packets - limit to 1 to reduce complexity 1807 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1808 1809 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1810 if (packet[5]) break; 1811 // terminate, name 248 chars 1812 packet[6+248] = 0; 1813 log_info("local name: %s", &packet[6]); 1814 } 1815 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1816 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1817 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1818 uint16_t acl_len = little_endian_read_16(packet, 6); 1819 uint16_t sco_len = packet[8]; 1820 1821 // determine usable ACL/SCO payload size 1822 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1823 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1824 1825 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1826 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1827 1828 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1829 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1830 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1831 } 1832 } 1833 #ifdef ENABLE_BLE 1834 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1835 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1836 hci_stack->le_acl_packets_total_num = packet[8]; 1837 // determine usable ACL payload size 1838 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1839 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1840 } 1841 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1842 } 1843 #endif 1844 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1845 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1846 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1847 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1848 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); 1849 } 1850 #endif 1851 #ifdef ENABLE_LE_CENTRAL 1852 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1853 hci_stack->le_whitelist_capacity = packet[6]; 1854 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1855 } 1856 #endif 1857 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1858 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1859 hci_stack->local_bd_addr); 1860 log_info("Local Address, Status: 0x%02x: Addr: %s", 1861 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1862 #ifdef ENABLE_CLASSIC 1863 if (hci_stack->link_key_db){ 1864 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1865 } 1866 #endif 1867 } 1868 #ifdef ENABLE_CLASSIC 1869 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1870 hci_emit_discoverable_enabled(hci_stack->discoverable); 1871 } 1872 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1873 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1874 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1875 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1876 hci_emit_event(event, sizeof(event), 1); 1877 } 1878 } 1879 #endif 1880 1881 // Note: HCI init checks 1882 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1883 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1884 1885 #ifdef ENABLE_CLASSIC 1886 // determine usable ACL packet types based on host buffer size and supported features 1887 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1888 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1889 #endif 1890 // Classic/LE 1891 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1892 } 1893 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1894 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1895 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1896 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1897 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1898 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1899 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1900 } 1901 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1902 hci_stack->local_supported_commands[0] = 1903 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1904 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1905 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1906 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 1907 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 1908 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2; // bit 5 = Octet 35, bit 3 1909 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1910 } 1911 #ifdef ENABLE_CLASSIC 1912 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1913 if (packet[5] == 0){ 1914 hci_stack->synchronous_flow_control_enabled = 1; 1915 } 1916 } 1917 #endif 1918 break; 1919 1920 case HCI_EVENT_COMMAND_STATUS: 1921 // get num cmd packets - limit to 1 to reduce complexity 1922 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1923 break; 1924 1925 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1926 int offset = 3; 1927 for (i=0; i<packet[2];i++){ 1928 handle = little_endian_read_16(packet, offset); 1929 offset += 2; 1930 uint16_t num_packets = little_endian_read_16(packet, offset); 1931 offset += 2; 1932 1933 conn = hci_connection_for_handle(handle); 1934 if (!conn){ 1935 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1936 continue; 1937 } 1938 1939 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1940 #ifdef ENABLE_CLASSIC 1941 if (conn->num_sco_packets_sent >= num_packets){ 1942 conn->num_sco_packets_sent -= num_packets; 1943 } else { 1944 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1945 conn->num_sco_packets_sent = 0; 1946 } 1947 hci_notify_if_sco_can_send_now(); 1948 #endif 1949 } else { 1950 if (conn->num_acl_packets_sent >= num_packets){ 1951 conn->num_acl_packets_sent -= num_packets; 1952 } else { 1953 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1954 conn->num_acl_packets_sent = 0; 1955 } 1956 } 1957 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1958 } 1959 break; 1960 } 1961 1962 #ifdef ENABLE_CLASSIC 1963 case HCI_EVENT_INQUIRY_COMPLETE: 1964 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 1965 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1966 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1967 hci_emit_event(event, sizeof(event), 1); 1968 } 1969 break; 1970 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1971 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 1972 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 1973 } 1974 break; 1975 case HCI_EVENT_CONNECTION_REQUEST: 1976 reverse_bd_addr(&packet[2], addr); 1977 // TODO: eval COD 8-10 1978 link_type = packet[11]; 1979 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1980 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1981 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1982 if (!conn) { 1983 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1984 } 1985 if (!conn) { 1986 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1987 hci_stack->decline_reason = 0x0d; 1988 bd_addr_copy(hci_stack->decline_addr, addr); 1989 break; 1990 } 1991 conn->role = HCI_ROLE_SLAVE; 1992 conn->state = RECEIVED_CONNECTION_REQUEST; 1993 // store info about eSCO 1994 if (link_type == 0x02){ 1995 conn->remote_supported_feature_eSCO = 1; 1996 } 1997 hci_run(); 1998 break; 1999 2000 case HCI_EVENT_CONNECTION_COMPLETE: 2001 // Connection management 2002 reverse_bd_addr(&packet[5], addr); 2003 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2004 addr_type = BD_ADDR_TYPE_CLASSIC; 2005 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2006 if (conn) { 2007 if (!packet[2]){ 2008 conn->state = OPEN; 2009 conn->con_handle = little_endian_read_16(packet, 3); 2010 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2011 2012 // restart timer 2013 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2014 btstack_run_loop_add_timer(&conn->timeout); 2015 2016 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2017 2018 hci_emit_nr_connections_changed(); 2019 } else { 2020 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2021 uint8_t status = packet[2]; 2022 bd_addr_t bd_address; 2023 memcpy(&bd_address, conn->address, 6); 2024 2025 // connection failed, remove entry 2026 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2027 btstack_memory_hci_connection_free( conn ); 2028 2029 // notify client if dedicated bonding 2030 if (notify_dedicated_bonding_failed){ 2031 log_info("hci notify_dedicated_bonding_failed"); 2032 hci_emit_dedicated_bonding_result(bd_address, status); 2033 } 2034 2035 // if authentication error, also delete link key 2036 if (packet[2] == 0x05) { 2037 gap_drop_link_key_for_bd_addr(addr); 2038 } 2039 } 2040 } 2041 break; 2042 2043 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2044 reverse_bd_addr(&packet[5], addr); 2045 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2046 if (packet[2]){ 2047 // connection failed 2048 break; 2049 } 2050 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2051 if (!conn) { 2052 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2053 } 2054 if (!conn) { 2055 break; 2056 } 2057 conn->state = OPEN; 2058 conn->con_handle = little_endian_read_16(packet, 3); 2059 2060 #ifdef ENABLE_SCO_OVER_HCI 2061 // update SCO 2062 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2063 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2064 } 2065 #endif 2066 break; 2067 2068 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2069 handle = little_endian_read_16(packet, 3); 2070 conn = hci_connection_for_handle(handle); 2071 if (!conn) break; 2072 if (!packet[2]){ 2073 uint8_t * features = &packet[5]; 2074 if (features[6] & (1 << 3)){ 2075 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2076 } 2077 if (features[3] & (1<<7)){ 2078 conn->remote_supported_feature_eSCO = 1; 2079 } 2080 } 2081 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2082 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2083 if (conn->bonding_flags & BONDING_DEDICATED){ 2084 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2085 } 2086 break; 2087 2088 case HCI_EVENT_LINK_KEY_REQUEST: 2089 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2090 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2091 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2092 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2093 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2094 hci_run(); 2095 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2096 return; 2097 2098 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2099 reverse_bd_addr(&packet[2], addr); 2100 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2101 if (!conn) break; 2102 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2103 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2104 // Change Connection Encryption keeps link key type 2105 if (link_key_type != CHANGED_COMBINATION_KEY){ 2106 conn->link_key_type = link_key_type; 2107 } 2108 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2109 // still forward event to allow dismiss of pairing dialog 2110 break; 2111 } 2112 2113 case HCI_EVENT_PIN_CODE_REQUEST: 2114 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2115 // non-bondable mode: pin code negative reply will be sent 2116 if (!hci_stack->bondable){ 2117 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2118 hci_run(); 2119 return; 2120 } 2121 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2122 if (!hci_stack->link_key_db) break; 2123 hci_event_pin_code_request_get_bd_addr(packet, addr); 2124 hci_stack->link_key_db->delete_link_key(addr); 2125 break; 2126 2127 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2128 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2129 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2130 break; 2131 2132 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2133 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2134 if (!hci_stack->ssp_auto_accept) break; 2135 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2136 break; 2137 2138 case HCI_EVENT_USER_PASSKEY_REQUEST: 2139 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2140 if (!hci_stack->ssp_auto_accept) break; 2141 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2142 break; 2143 #endif 2144 2145 case HCI_EVENT_ENCRYPTION_CHANGE: 2146 handle = little_endian_read_16(packet, 3); 2147 conn = hci_connection_for_handle(handle); 2148 if (!conn) break; 2149 if (packet[2] == 0) { 2150 if (packet[5]){ 2151 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2152 } else { 2153 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2154 } 2155 } 2156 #ifdef ENABLE_CLASSIC 2157 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2158 #endif 2159 break; 2160 2161 #ifdef ENABLE_CLASSIC 2162 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2163 handle = little_endian_read_16(packet, 3); 2164 conn = hci_connection_for_handle(handle); 2165 if (!conn) break; 2166 2167 // dedicated bonding: send result and disconnect 2168 if (conn->bonding_flags & BONDING_DEDICATED){ 2169 conn->bonding_flags &= ~BONDING_DEDICATED; 2170 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2171 conn->bonding_status = packet[2]; 2172 break; 2173 } 2174 2175 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2176 // link key sufficient for requested security 2177 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2178 break; 2179 } 2180 // not enough 2181 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2182 break; 2183 #endif 2184 2185 // HCI_EVENT_DISCONNECTION_COMPLETE 2186 // has been split, to first notify stack before shutting connection down 2187 // see end of function, too. 2188 case HCI_EVENT_DISCONNECTION_COMPLETE: 2189 if (packet[2]) break; // status != 0 2190 handle = little_endian_read_16(packet, 3); 2191 // drop outgoing ACL fragments if it is for closed connection 2192 if (hci_stack->acl_fragmentation_total_size > 0) { 2193 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2194 log_info("hci: drop fragmented ACL data for closed connection"); 2195 hci_stack->acl_fragmentation_total_size = 0; 2196 hci_stack->acl_fragmentation_pos = 0; 2197 } 2198 } 2199 2200 // re-enable advertisements for le connections if active 2201 conn = hci_connection_for_handle(handle); 2202 if (!conn) break; 2203 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2204 #ifdef ENABLE_BLE 2205 #ifdef ENABLE_LE_PERIPHERAL 2206 if (hci_is_le_connection(conn)){ 2207 hci_reenable_advertisements_if_needed(); 2208 } 2209 #endif 2210 #endif 2211 break; 2212 2213 case HCI_EVENT_HARDWARE_ERROR: 2214 log_error("Hardware Error: 0x%02x", packet[2]); 2215 if (hci_stack->hardware_error_callback){ 2216 (*hci_stack->hardware_error_callback)(packet[2]); 2217 } else { 2218 // if no special requests, just reboot stack 2219 hci_power_control_off(); 2220 hci_power_control_on(); 2221 } 2222 break; 2223 2224 #ifdef ENABLE_CLASSIC 2225 case HCI_EVENT_ROLE_CHANGE: 2226 if (packet[2]) break; // status != 0 2227 reverse_bd_addr(&packet[3], addr); 2228 addr_type = BD_ADDR_TYPE_CLASSIC; 2229 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2230 if (!conn) break; 2231 conn->role = packet[9]; 2232 break; 2233 #endif 2234 2235 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2236 // release packet buffer only for asynchronous transport and if there are not further fragements 2237 if (hci_transport_synchronous()) { 2238 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2239 return; // instead of break: to avoid re-entering hci_run() 2240 } 2241 if (hci_stack->acl_fragmentation_total_size) break; 2242 hci_release_packet_buffer(); 2243 2244 // L2CAP receives this event via the hci_emit_event below 2245 2246 #ifdef ENABLE_CLASSIC 2247 // For SCO, we do the can_send_now_check here 2248 hci_notify_if_sco_can_send_now(); 2249 #endif 2250 break; 2251 2252 #ifdef ENABLE_CLASSIC 2253 case HCI_EVENT_SCO_CAN_SEND_NOW: 2254 // For SCO, we do the can_send_now_check here 2255 hci_notify_if_sco_can_send_now(); 2256 return; 2257 2258 // explode inquriy results for easier consumption 2259 case HCI_EVENT_INQUIRY_RESULT: 2260 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2261 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2262 gap_inquiry_explode(packet); 2263 break; 2264 #endif 2265 2266 #ifdef ENABLE_BLE 2267 case HCI_EVENT_LE_META: 2268 switch (packet[2]){ 2269 #ifdef ENABLE_LE_CENTRAL 2270 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2271 // log_info("advertising report received"); 2272 if (!hci_stack->le_scanning_enabled) break; 2273 le_handle_advertisement_report(packet, size); 2274 break; 2275 #endif 2276 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2277 // Connection management 2278 reverse_bd_addr(&packet[8], addr); 2279 addr_type = (bd_addr_type_t)packet[7]; 2280 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2281 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2282 2283 #ifdef ENABLE_LE_CENTRAL 2284 // if auto-connect, remove from whitelist in both roles 2285 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2286 hci_remove_from_whitelist(addr_type, addr); 2287 } 2288 // handle error: error is reported only to the initiator -> outgoing connection 2289 if (packet[3]){ 2290 2291 // handle cancelled outgoing connection 2292 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2293 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2294 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2295 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2296 conn = gap_get_outgoing_connection(); 2297 } 2298 2299 // outgoing connection establishment is done 2300 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2301 // remove entry 2302 if (conn){ 2303 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2304 btstack_memory_hci_connection_free( conn ); 2305 } 2306 break; 2307 } 2308 #endif 2309 // on success, both hosts receive connection complete event 2310 if (packet[6] == HCI_ROLE_MASTER){ 2311 #ifdef ENABLE_LE_CENTRAL 2312 // if we're master, it was an outgoing connection and we're done with it 2313 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2314 #endif 2315 } else { 2316 #ifdef ENABLE_LE_PERIPHERAL 2317 // if we're slave, it was an incoming connection, advertisements have stopped 2318 hci_stack->le_advertisements_active = 0; 2319 #endif 2320 } 2321 // LE connections are auto-accepted, so just create a connection if there isn't one already 2322 if (!conn){ 2323 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2324 } 2325 // no memory, sorry. 2326 if (!conn){ 2327 break; 2328 } 2329 2330 conn->state = OPEN; 2331 conn->role = packet[6]; 2332 conn->con_handle = little_endian_read_16(packet, 4); 2333 2334 #ifdef ENABLE_LE_PERIPHERAL 2335 if (packet[6] == HCI_ROLE_SLAVE){ 2336 hci_reenable_advertisements_if_needed(); 2337 } 2338 #endif 2339 2340 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2341 2342 // restart timer 2343 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2344 // btstack_run_loop_add_timer(&conn->timeout); 2345 2346 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2347 2348 hci_emit_nr_connections_changed(); 2349 break; 2350 2351 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2352 2353 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2354 // connection 2355 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2356 conn = hci_connection_for_handle(handle); 2357 if (conn) { 2358 // read arguments 2359 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2360 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2361 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2362 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2363 2364 // validate against current connection parameter range 2365 le_connection_parameter_range_t existing_range; 2366 gap_get_connection_parameter_range(&existing_range); 2367 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2368 if (update_parameter){ 2369 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2370 conn->le_conn_interval_min = le_conn_interval_min; 2371 conn->le_conn_interval_max = le_conn_interval_max; 2372 conn->le_conn_latency = le_conn_latency; 2373 conn->le_supervision_timeout = le_supervision_timeout; 2374 } else { 2375 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2376 } 2377 } 2378 break; 2379 default: 2380 break; 2381 } 2382 break; 2383 #endif 2384 case HCI_EVENT_VENDOR_SPECIFIC: 2385 // Vendor specific commands often create vendor specific event instead of num completed packets 2386 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2387 switch (hci_stack->manufacturer){ 2388 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2389 hci_stack->num_cmd_packets = 1; 2390 break; 2391 default: 2392 break; 2393 } 2394 break; 2395 default: 2396 break; 2397 } 2398 2399 // handle BT initialization 2400 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2401 hci_initializing_event_handler(packet, size); 2402 } 2403 2404 // help with BT sleep 2405 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2406 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2407 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2408 hci_initializing_next_state(); 2409 } 2410 2411 // notify upper stack 2412 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2413 2414 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2415 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2416 if (!packet[2]){ 2417 handle = little_endian_read_16(packet, 3); 2418 hci_connection_t * aConn = hci_connection_for_handle(handle); 2419 if (aConn) { 2420 uint8_t status = aConn->bonding_status; 2421 uint16_t flags = aConn->bonding_flags; 2422 bd_addr_t bd_address; 2423 memcpy(&bd_address, aConn->address, 6); 2424 hci_shutdown_connection(aConn); 2425 // connection struct is gone, don't access anymore 2426 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2427 hci_emit_dedicated_bonding_result(bd_address, status); 2428 } 2429 } 2430 } 2431 } 2432 2433 // execute main loop 2434 hci_run(); 2435 } 2436 2437 #ifdef ENABLE_CLASSIC 2438 static void sco_handler(uint8_t * packet, uint16_t size){ 2439 if (!hci_stack->sco_packet_handler) return; 2440 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2441 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2442 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2443 hci_connection_t *conn = hci_connection_for_handle(con_handle); 2444 if (conn){ 2445 conn->num_packets_completed++; 2446 hci_stack->host_completed_packets = 1; 2447 hci_run(); 2448 } 2449 #endif 2450 } 2451 #endif 2452 2453 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2454 hci_dump_packet(packet_type, 1, packet, size); 2455 switch (packet_type) { 2456 case HCI_EVENT_PACKET: 2457 event_handler(packet, size); 2458 break; 2459 case HCI_ACL_DATA_PACKET: 2460 acl_handler(packet, size); 2461 break; 2462 #ifdef ENABLE_CLASSIC 2463 case HCI_SCO_DATA_PACKET: 2464 sco_handler(packet, size); 2465 break; 2466 #endif 2467 default: 2468 break; 2469 } 2470 } 2471 2472 /** 2473 * @brief Add event packet handler. 2474 */ 2475 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2476 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2477 } 2478 2479 2480 /** Register HCI packet handlers */ 2481 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2482 hci_stack->acl_packet_handler = handler; 2483 } 2484 2485 #ifdef ENABLE_CLASSIC 2486 /** 2487 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2488 */ 2489 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2490 hci_stack->sco_packet_handler = handler; 2491 } 2492 #endif 2493 2494 static void hci_state_reset(void){ 2495 // no connections yet 2496 hci_stack->connections = NULL; 2497 2498 // keep discoverable/connectable as this has been requested by the client(s) 2499 // hci_stack->discoverable = 0; 2500 // hci_stack->connectable = 0; 2501 // hci_stack->bondable = 1; 2502 // hci_stack->own_addr_type = 0; 2503 2504 // buffer is free 2505 hci_stack->hci_packet_buffer_reserved = 0; 2506 2507 // no pending cmds 2508 hci_stack->decline_reason = 0; 2509 hci_stack->new_scan_enable_value = 0xff; 2510 2511 // LE 2512 #ifdef ENABLE_BLE 2513 memset(hci_stack->le_random_address, 0, 6); 2514 hci_stack->le_random_address_set = 0; 2515 #endif 2516 #ifdef ENABLE_LE_CENTRAL 2517 hci_stack->le_scanning_active = 0; 2518 hci_stack->le_scan_type = 0xff; 2519 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2520 hci_stack->le_whitelist = 0; 2521 hci_stack->le_whitelist_capacity = 0; 2522 #endif 2523 } 2524 2525 #ifdef ENABLE_CLASSIC 2526 /** 2527 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2528 */ 2529 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2530 // store and open remote device db 2531 hci_stack->link_key_db = link_key_db; 2532 if (hci_stack->link_key_db) { 2533 hci_stack->link_key_db->open(); 2534 } 2535 } 2536 #endif 2537 2538 void hci_init(const hci_transport_t *transport, const void *config){ 2539 2540 #ifdef HAVE_MALLOC 2541 if (!hci_stack) { 2542 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2543 } 2544 #else 2545 hci_stack = &hci_stack_static; 2546 #endif 2547 memset(hci_stack, 0, sizeof(hci_stack_t)); 2548 2549 // reference to use transport layer implementation 2550 hci_stack->hci_transport = transport; 2551 2552 // reference to used config 2553 hci_stack->config = config; 2554 2555 // setup pointer for outgoing packet buffer 2556 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2557 2558 // max acl payload size defined in config.h 2559 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2560 2561 // register packet handlers with transport 2562 transport->register_packet_handler(&packet_handler); 2563 2564 hci_stack->state = HCI_STATE_OFF; 2565 2566 // class of device 2567 hci_stack->class_of_device = 0x007a020c; // Smartphone 2568 2569 // bondable by default 2570 hci_stack->bondable = 1; 2571 2572 #ifdef ENABLE_CLASSIC 2573 // classic name 2574 hci_stack->local_name = default_classic_name; 2575 2576 // Master slave policy 2577 hci_stack->master_slave_policy = 1; 2578 #endif 2579 2580 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2581 hci_stack->ssp_enable = 1; 2582 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2583 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2584 hci_stack->ssp_auto_accept = 1; 2585 2586 // voice setting - signed 16 bit pcm data with CVSD over the air 2587 hci_stack->sco_voice_setting = 0x60; 2588 2589 #ifdef ENABLE_LE_CENTRAL 2590 // connection parameter to use for outgoing connections 2591 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2592 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2593 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2594 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2595 hci_stack->le_connection_latency = 4; // 4 2596 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2597 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2598 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2599 #endif 2600 2601 #ifdef ENABLE_LE_PERIPHERAL 2602 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2603 #endif 2604 2605 // connection parameter range used to answer connection parameter update requests in l2cap 2606 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2607 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2608 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2609 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2610 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2611 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2612 2613 hci_state_reset(); 2614 } 2615 2616 /** 2617 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2618 */ 2619 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2620 hci_stack->chipset = chipset_driver; 2621 2622 // reset chipset driver - init is also called on power_up 2623 if (hci_stack->chipset && hci_stack->chipset->init){ 2624 hci_stack->chipset->init(hci_stack->config); 2625 } 2626 } 2627 2628 /** 2629 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2630 */ 2631 void hci_set_control(const btstack_control_t *hardware_control){ 2632 // references to used control implementation 2633 hci_stack->control = hardware_control; 2634 // init with transport config 2635 hardware_control->init(hci_stack->config); 2636 } 2637 2638 void hci_close(void){ 2639 // close remote device db 2640 if (hci_stack->link_key_db) { 2641 hci_stack->link_key_db->close(); 2642 } 2643 2644 btstack_linked_list_iterator_t lit; 2645 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2646 while (btstack_linked_list_iterator_has_next(&lit)){ 2647 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2648 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2649 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2650 hci_shutdown_connection(connection); 2651 } 2652 2653 hci_power_control(HCI_POWER_OFF); 2654 2655 #ifdef HAVE_MALLOC 2656 free(hci_stack); 2657 #endif 2658 hci_stack = NULL; 2659 } 2660 2661 #ifdef ENABLE_CLASSIC 2662 void gap_set_class_of_device(uint32_t class_of_device){ 2663 hci_stack->class_of_device = class_of_device; 2664 } 2665 2666 void hci_disable_l2cap_timeout_check(void){ 2667 disable_l2cap_timeouts = 1; 2668 } 2669 #endif 2670 2671 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2672 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2673 void hci_set_bd_addr(bd_addr_t addr){ 2674 memcpy(hci_stack->custom_bd_addr, addr, 6); 2675 hci_stack->custom_bd_addr_set = 1; 2676 } 2677 #endif 2678 2679 // State-Module-Driver overview 2680 // state module low-level 2681 // HCI_STATE_OFF off close 2682 // HCI_STATE_INITIALIZING, on open 2683 // HCI_STATE_WORKING, on open 2684 // HCI_STATE_HALTING, on open 2685 // HCI_STATE_SLEEPING, off/sleep close 2686 // HCI_STATE_FALLING_ASLEEP on open 2687 2688 static int hci_power_control_on(void){ 2689 2690 // power on 2691 int err = 0; 2692 if (hci_stack->control && hci_stack->control->on){ 2693 err = (*hci_stack->control->on)(); 2694 } 2695 if (err){ 2696 log_error( "POWER_ON failed"); 2697 hci_emit_hci_open_failed(); 2698 return err; 2699 } 2700 2701 // int chipset driver 2702 if (hci_stack->chipset && hci_stack->chipset->init){ 2703 hci_stack->chipset->init(hci_stack->config); 2704 } 2705 2706 // init transport 2707 if (hci_stack->hci_transport->init){ 2708 hci_stack->hci_transport->init(hci_stack->config); 2709 } 2710 2711 // open transport 2712 err = hci_stack->hci_transport->open(); 2713 if (err){ 2714 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2715 if (hci_stack->control && hci_stack->control->off){ 2716 (*hci_stack->control->off)(); 2717 } 2718 hci_emit_hci_open_failed(); 2719 return err; 2720 } 2721 return 0; 2722 } 2723 2724 static void hci_power_control_off(void){ 2725 2726 log_info("hci_power_control_off"); 2727 2728 // close low-level device 2729 hci_stack->hci_transport->close(); 2730 2731 log_info("hci_power_control_off - hci_transport closed"); 2732 2733 // power off 2734 if (hci_stack->control && hci_stack->control->off){ 2735 (*hci_stack->control->off)(); 2736 } 2737 2738 log_info("hci_power_control_off - control closed"); 2739 2740 hci_stack->state = HCI_STATE_OFF; 2741 } 2742 2743 static void hci_power_control_sleep(void){ 2744 2745 log_info("hci_power_control_sleep"); 2746 2747 #if 0 2748 // don't close serial port during sleep 2749 2750 // close low-level device 2751 hci_stack->hci_transport->close(hci_stack->config); 2752 #endif 2753 2754 // sleep mode 2755 if (hci_stack->control && hci_stack->control->sleep){ 2756 (*hci_stack->control->sleep)(); 2757 } 2758 2759 hci_stack->state = HCI_STATE_SLEEPING; 2760 } 2761 2762 static int hci_power_control_wake(void){ 2763 2764 log_info("hci_power_control_wake"); 2765 2766 // wake on 2767 if (hci_stack->control && hci_stack->control->wake){ 2768 (*hci_stack->control->wake)(); 2769 } 2770 2771 #if 0 2772 // open low-level device 2773 int err = hci_stack->hci_transport->open(hci_stack->config); 2774 if (err){ 2775 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2776 if (hci_stack->control && hci_stack->control->off){ 2777 (*hci_stack->control->off)(); 2778 } 2779 hci_emit_hci_open_failed(); 2780 return err; 2781 } 2782 #endif 2783 2784 return 0; 2785 } 2786 2787 static void hci_power_transition_to_initializing(void){ 2788 // set up state machine 2789 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2790 hci_stack->hci_packet_buffer_reserved = 0; 2791 hci_stack->state = HCI_STATE_INITIALIZING; 2792 hci_stack->substate = HCI_INIT_SEND_RESET; 2793 } 2794 2795 int hci_power_control(HCI_POWER_MODE power_mode){ 2796 2797 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2798 2799 int err = 0; 2800 switch (hci_stack->state){ 2801 2802 case HCI_STATE_OFF: 2803 switch (power_mode){ 2804 case HCI_POWER_ON: 2805 err = hci_power_control_on(); 2806 if (err) { 2807 log_error("hci_power_control_on() error %d", err); 2808 return err; 2809 } 2810 hci_power_transition_to_initializing(); 2811 break; 2812 case HCI_POWER_OFF: 2813 // do nothing 2814 break; 2815 case HCI_POWER_SLEEP: 2816 // do nothing (with SLEEP == OFF) 2817 break; 2818 } 2819 break; 2820 2821 case HCI_STATE_INITIALIZING: 2822 switch (power_mode){ 2823 case HCI_POWER_ON: 2824 // do nothing 2825 break; 2826 case HCI_POWER_OFF: 2827 // no connections yet, just turn it off 2828 hci_power_control_off(); 2829 break; 2830 case HCI_POWER_SLEEP: 2831 // no connections yet, just turn it off 2832 hci_power_control_sleep(); 2833 break; 2834 } 2835 break; 2836 2837 case HCI_STATE_WORKING: 2838 switch (power_mode){ 2839 case HCI_POWER_ON: 2840 // do nothing 2841 break; 2842 case HCI_POWER_OFF: 2843 // see hci_run 2844 hci_stack->state = HCI_STATE_HALTING; 2845 break; 2846 case HCI_POWER_SLEEP: 2847 // see hci_run 2848 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2849 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2850 break; 2851 } 2852 break; 2853 2854 case HCI_STATE_HALTING: 2855 switch (power_mode){ 2856 case HCI_POWER_ON: 2857 hci_power_transition_to_initializing(); 2858 break; 2859 case HCI_POWER_OFF: 2860 // do nothing 2861 break; 2862 case HCI_POWER_SLEEP: 2863 // see hci_run 2864 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2865 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2866 break; 2867 } 2868 break; 2869 2870 case HCI_STATE_FALLING_ASLEEP: 2871 switch (power_mode){ 2872 case HCI_POWER_ON: 2873 2874 #ifdef HAVE_PLATFORM_IPHONE_OS 2875 // nothing to do, if H4 supports power management 2876 if (btstack_control_iphone_power_management_enabled()){ 2877 hci_stack->state = HCI_STATE_INITIALIZING; 2878 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2879 break; 2880 } 2881 #endif 2882 hci_power_transition_to_initializing(); 2883 break; 2884 case HCI_POWER_OFF: 2885 // see hci_run 2886 hci_stack->state = HCI_STATE_HALTING; 2887 break; 2888 case HCI_POWER_SLEEP: 2889 // do nothing 2890 break; 2891 } 2892 break; 2893 2894 case HCI_STATE_SLEEPING: 2895 switch (power_mode){ 2896 case HCI_POWER_ON: 2897 2898 #ifdef HAVE_PLATFORM_IPHONE_OS 2899 // nothing to do, if H4 supports power management 2900 if (btstack_control_iphone_power_management_enabled()){ 2901 hci_stack->state = HCI_STATE_INITIALIZING; 2902 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2903 hci_update_scan_enable(); 2904 break; 2905 } 2906 #endif 2907 err = hci_power_control_wake(); 2908 if (err) return err; 2909 hci_power_transition_to_initializing(); 2910 break; 2911 case HCI_POWER_OFF: 2912 hci_stack->state = HCI_STATE_HALTING; 2913 break; 2914 case HCI_POWER_SLEEP: 2915 // do nothing 2916 break; 2917 } 2918 break; 2919 } 2920 2921 // create internal event 2922 hci_emit_state(); 2923 2924 // trigger next/first action 2925 hci_run(); 2926 2927 return 0; 2928 } 2929 2930 2931 #ifdef ENABLE_CLASSIC 2932 2933 static void hci_update_scan_enable(void){ 2934 // 2 = page scan, 1 = inq scan 2935 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2936 hci_run(); 2937 } 2938 2939 void gap_discoverable_control(uint8_t enable){ 2940 if (enable) enable = 1; // normalize argument 2941 2942 if (hci_stack->discoverable == enable){ 2943 hci_emit_discoverable_enabled(hci_stack->discoverable); 2944 return; 2945 } 2946 2947 hci_stack->discoverable = enable; 2948 hci_update_scan_enable(); 2949 } 2950 2951 void gap_connectable_control(uint8_t enable){ 2952 if (enable) enable = 1; // normalize argument 2953 2954 // don't emit event 2955 if (hci_stack->connectable == enable) return; 2956 2957 hci_stack->connectable = enable; 2958 hci_update_scan_enable(); 2959 } 2960 #endif 2961 2962 void gap_local_bd_addr(bd_addr_t address_buffer){ 2963 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2964 } 2965 2966 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2967 static void hci_host_num_completed_packets(void){ 2968 2969 // create packet manually as arrays are not supported and num_commands should not get reduced 2970 hci_reserve_packet_buffer(); 2971 uint8_t * packet = hci_get_outgoing_packet_buffer(); 2972 2973 uint16_t size = 0; 2974 uint16_t num_handles = 0; 2975 packet[size++] = 0x35; 2976 packet[size++] = 0x0c; 2977 size++; // skip param len 2978 size++; // skip num handles 2979 2980 // add { handle, packets } entries 2981 btstack_linked_item_t * it; 2982 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2983 hci_connection_t * connection = (hci_connection_t *) it; 2984 if (connection->num_packets_completed){ 2985 little_endian_store_16(packet, size, connection->con_handle); 2986 size += 2; 2987 little_endian_store_16(packet, size, connection->num_packets_completed); 2988 size += 2; 2989 // 2990 num_handles++; 2991 connection->num_packets_completed = 0; 2992 } 2993 } 2994 2995 packet[2] = size - 3; 2996 packet[3] = num_handles; 2997 2998 hci_stack->host_completed_packets = 0; 2999 3000 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3001 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3002 3003 // release packet buffer for synchronous transport implementations 3004 if (hci_transport_synchronous()){ 3005 hci_stack->hci_packet_buffer_reserved = 0; 3006 } 3007 } 3008 #endif 3009 3010 static void hci_run(void){ 3011 3012 // log_info("hci_run: entered"); 3013 btstack_linked_item_t * it; 3014 3015 // send continuation fragments first, as they block the prepared packet buffer 3016 if (hci_stack->acl_fragmentation_total_size > 0) { 3017 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3018 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3019 if (connection) { 3020 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3021 hci_send_acl_packet_fragments(connection); 3022 return; 3023 } 3024 } else { 3025 // connection gone -> discard further fragments 3026 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3027 hci_stack->acl_fragmentation_total_size = 0; 3028 hci_stack->acl_fragmentation_pos = 0; 3029 } 3030 } 3031 3032 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3033 // send host num completed packets next as they don't require num_cmd_packets > 0 3034 if (!hci_can_send_comand_packet_transport()) return; 3035 if (hci_stack->host_completed_packets){ 3036 hci_host_num_completed_packets(); 3037 return; 3038 } 3039 #endif 3040 3041 if (!hci_can_send_command_packet_now()) return; 3042 3043 // global/non-connection oriented commands 3044 3045 #ifdef ENABLE_CLASSIC 3046 // decline incoming connections 3047 if (hci_stack->decline_reason){ 3048 uint8_t reason = hci_stack->decline_reason; 3049 hci_stack->decline_reason = 0; 3050 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3051 return; 3052 } 3053 // send scan enable 3054 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 3055 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3056 hci_stack->new_scan_enable_value = 0xff; 3057 return; 3058 } 3059 // start/stop inquiry 3060 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 3061 uint8_t duration = hci_stack->inquiry_state; 3062 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3063 hci_send_cmd(&hci_inquiry, HCI_INQUIRY_LAP, duration, 0); 3064 return; 3065 } 3066 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3067 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3068 hci_send_cmd(&hci_inquiry_cancel); 3069 return; 3070 } 3071 // remote name request 3072 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3073 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3074 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3075 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3076 return; 3077 } 3078 // pairing 3079 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3080 uint8_t state = hci_stack->gap_pairing_state; 3081 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3082 switch (state){ 3083 case GAP_PAIRING_STATE_SEND_PIN: 3084 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, strlen(hci_stack->gap_pairing_pin), hci_stack->gap_pairing_pin); 3085 break; 3086 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3087 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3088 break; 3089 case GAP_PAIRING_STATE_SEND_PASSKEY: 3090 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_passkey); 3091 break; 3092 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3093 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3094 break; 3095 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3096 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3097 break; 3098 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3099 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3100 break; 3101 default: 3102 break; 3103 } 3104 return; 3105 } 3106 #endif 3107 3108 #ifdef ENABLE_BLE 3109 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 3110 if ((hci_stack->state == HCI_STATE_WORKING) 3111 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 3112 3113 #ifdef ENABLE_LE_CENTRAL 3114 // handle le scan 3115 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3116 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3117 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3118 return; 3119 } 3120 if (hci_stack->le_scan_type != 0xff){ 3121 // defaults: active scanning, accept all advertisement packets 3122 int scan_type = hci_stack->le_scan_type; 3123 hci_stack->le_scan_type = 0xff; 3124 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); 3125 return; 3126 } 3127 #endif 3128 #ifdef ENABLE_LE_PERIPHERAL 3129 // le advertisement control 3130 if (hci_stack->le_advertisements_todo){ 3131 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3132 } 3133 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3134 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3135 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3136 return; 3137 } 3138 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3139 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3140 hci_send_cmd(&hci_le_set_advertising_parameters, 3141 hci_stack->le_advertisements_interval_min, 3142 hci_stack->le_advertisements_interval_max, 3143 hci_stack->le_advertisements_type, 3144 hci_stack->le_own_addr_type, 3145 hci_stack->le_advertisements_direct_address_type, 3146 hci_stack->le_advertisements_direct_address, 3147 hci_stack->le_advertisements_channel_map, 3148 hci_stack->le_advertisements_filter_policy); 3149 return; 3150 } 3151 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3152 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3153 uint8_t adv_data_clean[31]; 3154 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3155 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 3156 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3157 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3158 return; 3159 } 3160 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3161 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3162 uint8_t scan_data_clean[31]; 3163 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3164 memcpy(scan_data_clean, hci_stack->le_scan_response_data, hci_stack->le_scan_response_data_len); 3165 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3166 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, hci_stack->le_scan_response_data); 3167 return; 3168 } 3169 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3170 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3171 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3172 return; 3173 } 3174 #endif 3175 3176 #ifdef ENABLE_LE_CENTRAL 3177 // 3178 // LE Whitelist Management 3179 // 3180 3181 // check if whitelist needs modification 3182 btstack_linked_list_iterator_t lit; 3183 int modification_pending = 0; 3184 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3185 while (btstack_linked_list_iterator_has_next(&lit)){ 3186 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3187 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3188 modification_pending = 1; 3189 break; 3190 } 3191 } 3192 3193 if (modification_pending){ 3194 // stop connnecting if modification pending 3195 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3196 hci_send_cmd(&hci_le_create_connection_cancel); 3197 return; 3198 } 3199 3200 // add/remove entries 3201 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3202 while (btstack_linked_list_iterator_has_next(&lit)){ 3203 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3204 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3205 entry->state = LE_WHITELIST_ON_CONTROLLER; 3206 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3207 return; 3208 3209 } 3210 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3211 bd_addr_t address; 3212 bd_addr_type_t address_type = entry->address_type; 3213 memcpy(address, entry->address, 6); 3214 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3215 btstack_memory_whitelist_entry_free(entry); 3216 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3217 return; 3218 } 3219 } 3220 } 3221 3222 // start connecting 3223 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3224 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3225 bd_addr_t null_addr; 3226 memset(null_addr, 0, 6); 3227 hci_send_cmd(&hci_le_create_connection, 3228 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3229 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3230 1, // use whitelist 3231 0, // peer address type 3232 null_addr, // peer bd addr 3233 hci_stack->le_own_addr_type, // our addr type: 3234 hci_stack->le_connection_interval_min, // conn interval min 3235 hci_stack->le_connection_interval_max, // conn interval max 3236 hci_stack->le_connection_latency, // conn latency 3237 hci_stack->le_supervision_timeout, // conn latency 3238 hci_stack->le_minimum_ce_length, // min ce length 3239 hci_stack->le_maximum_ce_length // max ce length 3240 ); 3241 return; 3242 } 3243 #endif 3244 } 3245 #endif 3246 3247 // send pending HCI commands 3248 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3249 hci_connection_t * connection = (hci_connection_t *) it; 3250 3251 switch(connection->state){ 3252 case SEND_CREATE_CONNECTION: 3253 switch(connection->address_type){ 3254 #ifdef ENABLE_CLASSIC 3255 case BD_ADDR_TYPE_CLASSIC: 3256 log_info("sending hci_create_connection"); 3257 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3258 break; 3259 #endif 3260 default: 3261 #ifdef ENABLE_BLE 3262 #ifdef ENABLE_LE_CENTRAL 3263 log_info("sending hci_le_create_connection"); 3264 hci_send_cmd(&hci_le_create_connection, 3265 hci_stack->le_connection_scan_interval, // conn scan interval 3266 hci_stack->le_connection_scan_window, // conn scan windows 3267 0, // don't use whitelist 3268 connection->address_type, // peer address type 3269 connection->address, // peer bd addr 3270 hci_stack->le_own_addr_type, // our addr type: 3271 hci_stack->le_connection_interval_min, // conn interval min 3272 hci_stack->le_connection_interval_max, // conn interval max 3273 hci_stack->le_connection_latency, // conn latency 3274 hci_stack->le_supervision_timeout, // conn latency 3275 hci_stack->le_minimum_ce_length, // min ce length 3276 hci_stack->le_maximum_ce_length // max ce length 3277 ); 3278 connection->state = SENT_CREATE_CONNECTION; 3279 #endif 3280 #endif 3281 break; 3282 } 3283 return; 3284 3285 #ifdef ENABLE_CLASSIC 3286 case RECEIVED_CONNECTION_REQUEST: 3287 connection->role = HCI_ROLE_SLAVE; 3288 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3289 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3290 connection->state = ACCEPTED_CONNECTION_REQUEST; 3291 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3292 } 3293 return; 3294 #endif 3295 3296 #ifdef ENABLE_BLE 3297 #ifdef ENABLE_LE_CENTRAL 3298 case SEND_CANCEL_CONNECTION: 3299 connection->state = SENT_CANCEL_CONNECTION; 3300 hci_send_cmd(&hci_le_create_connection_cancel); 3301 return; 3302 #endif 3303 #endif 3304 case SEND_DISCONNECT: 3305 connection->state = SENT_DISCONNECT; 3306 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3307 return; 3308 3309 default: 3310 break; 3311 } 3312 3313 #ifdef ENABLE_CLASSIC 3314 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3315 log_info("responding to link key request"); 3316 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3317 link_key_t link_key; 3318 link_key_type_t link_key_type; 3319 if ( hci_stack->link_key_db 3320 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3321 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3322 connection->link_key_type = link_key_type; 3323 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3324 } else { 3325 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3326 } 3327 return; 3328 } 3329 3330 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3331 log_info("denying to pin request"); 3332 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3333 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3334 return; 3335 } 3336 3337 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3338 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3339 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3340 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3341 // tweak authentication requirements 3342 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3343 if (connection->bonding_flags & BONDING_DEDICATED){ 3344 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3345 } 3346 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3347 authreq |= 1; 3348 } 3349 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3350 } else { 3351 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3352 } 3353 return; 3354 } 3355 3356 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3357 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3358 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3359 return; 3360 } 3361 3362 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3363 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3364 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3365 return; 3366 } 3367 3368 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3369 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3370 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3371 return; 3372 } 3373 3374 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3375 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3376 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3377 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3378 return; 3379 } 3380 3381 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3382 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3383 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3384 return; 3385 } 3386 3387 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3388 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3389 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3390 return; 3391 } 3392 #endif 3393 3394 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3395 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3396 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3397 return; 3398 } 3399 3400 #ifdef ENABLE_BLE 3401 switch (connection->le_con_parameter_update_state){ 3402 // response to L2CAP CON PARAMETER UPDATE REQUEST 3403 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3404 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3405 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3406 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3407 0x0000, 0xffff); 3408 break; 3409 case CON_PARAMETER_UPDATE_REPLY: 3410 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3411 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3412 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3413 0x0000, 0xffff); 3414 break; 3415 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3416 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3417 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3418 break; 3419 default: 3420 break; 3421 } 3422 #endif 3423 } 3424 3425 hci_connection_t * connection; 3426 switch (hci_stack->state){ 3427 case HCI_STATE_INITIALIZING: 3428 hci_initializing_run(); 3429 break; 3430 3431 case HCI_STATE_HALTING: 3432 3433 log_info("HCI_STATE_HALTING"); 3434 3435 // free whitelist entries 3436 #ifdef ENABLE_BLE 3437 #ifdef ENABLE_LE_CENTRAL 3438 { 3439 btstack_linked_list_iterator_t lit; 3440 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3441 while (btstack_linked_list_iterator_has_next(&lit)){ 3442 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3443 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3444 btstack_memory_whitelist_entry_free(entry); 3445 } 3446 } 3447 #endif 3448 #endif 3449 // close all open connections 3450 connection = (hci_connection_t *) hci_stack->connections; 3451 if (connection){ 3452 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3453 if (!hci_can_send_command_packet_now()) return; 3454 3455 // check state 3456 if (connection->state == SENT_DISCONNECT) return; 3457 connection->state = SENT_DISCONNECT; 3458 3459 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3460 3461 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3462 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3463 3464 // ... which would be ignored anyway as we shutdown (free) the connection now 3465 hci_shutdown_connection(connection); 3466 3467 // finally, send the disconnect command 3468 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3469 return; 3470 } 3471 log_info("HCI_STATE_HALTING, calling off"); 3472 3473 // switch mode 3474 hci_power_control_off(); 3475 3476 log_info("HCI_STATE_HALTING, emitting state"); 3477 hci_emit_state(); 3478 log_info("HCI_STATE_HALTING, done"); 3479 break; 3480 3481 case HCI_STATE_FALLING_ASLEEP: 3482 switch(hci_stack->substate) { 3483 case HCI_FALLING_ASLEEP_DISCONNECT: 3484 log_info("HCI_STATE_FALLING_ASLEEP"); 3485 // close all open connections 3486 connection = (hci_connection_t *) hci_stack->connections; 3487 3488 #ifdef HAVE_PLATFORM_IPHONE_OS 3489 // don't close connections, if H4 supports power management 3490 if (btstack_control_iphone_power_management_enabled()){ 3491 connection = NULL; 3492 } 3493 #endif 3494 if (connection){ 3495 3496 // send disconnect 3497 if (!hci_can_send_command_packet_now()) return; 3498 3499 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3500 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3501 3502 // send disconnected event right away - causes higher layer connections to get closed, too. 3503 hci_shutdown_connection(connection); 3504 return; 3505 } 3506 3507 if (hci_classic_supported()){ 3508 // disable page and inquiry scan 3509 if (!hci_can_send_command_packet_now()) return; 3510 3511 log_info("HCI_STATE_HALTING, disabling inq scans"); 3512 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3513 3514 // continue in next sub state 3515 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3516 break; 3517 } 3518 // no break - fall through for ble-only chips 3519 3520 case HCI_FALLING_ASLEEP_COMPLETE: 3521 log_info("HCI_STATE_HALTING, calling sleep"); 3522 #ifdef HAVE_PLATFORM_IPHONE_OS 3523 // don't actually go to sleep, if H4 supports power management 3524 if (btstack_control_iphone_power_management_enabled()){ 3525 // SLEEP MODE reached 3526 hci_stack->state = HCI_STATE_SLEEPING; 3527 hci_emit_state(); 3528 break; 3529 } 3530 #endif 3531 // switch mode 3532 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3533 hci_emit_state(); 3534 break; 3535 3536 default: 3537 break; 3538 } 3539 break; 3540 3541 default: 3542 break; 3543 } 3544 } 3545 3546 int hci_send_cmd_packet(uint8_t *packet, int size){ 3547 // house-keeping 3548 3549 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3550 hci_stack->loopback_mode = packet[3]; 3551 } 3552 3553 #ifdef ENABLE_CLASSIC 3554 bd_addr_t addr; 3555 hci_connection_t * conn; 3556 3557 // create_connection? 3558 if (IS_COMMAND(packet, hci_create_connection)){ 3559 reverse_bd_addr(&packet[3], addr); 3560 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3561 3562 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3563 if (!conn){ 3564 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3565 if (!conn){ 3566 // notify client that alloc failed 3567 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3568 return 0; // don't sent packet to controller 3569 } 3570 conn->state = SEND_CREATE_CONNECTION; 3571 } 3572 log_info("conn state %u", conn->state); 3573 switch (conn->state){ 3574 // if connection active exists 3575 case OPEN: 3576 // and OPEN, emit connection complete command, don't send to controller 3577 hci_emit_connection_complete(addr, conn->con_handle, 0); 3578 return 0; 3579 case SEND_CREATE_CONNECTION: 3580 // connection created by hci, e.g. dedicated bonding 3581 break; 3582 default: 3583 // otherwise, just ignore as it is already in the open process 3584 return 0; 3585 } 3586 conn->state = SENT_CREATE_CONNECTION; 3587 } 3588 3589 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3590 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3591 } 3592 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3593 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3594 } 3595 3596 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3597 if (hci_stack->link_key_db){ 3598 reverse_bd_addr(&packet[3], addr); 3599 hci_stack->link_key_db->delete_link_key(addr); 3600 } 3601 } 3602 3603 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3604 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3605 reverse_bd_addr(&packet[3], addr); 3606 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3607 if (conn){ 3608 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3609 } 3610 } 3611 3612 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3613 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3614 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3615 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3616 reverse_bd_addr(&packet[3], addr); 3617 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3618 if (conn){ 3619 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3620 } 3621 } 3622 3623 #ifdef ENABLE_SCO_OVER_HCI 3624 // setup_synchronous_connection? Voice setting at offset 22 3625 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3626 // TODO: compare to current setting if sco connection already active 3627 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3628 } 3629 // accept_synchronus_connection? Voice setting at offset 18 3630 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3631 // TODO: compare to current setting if sco connection already active 3632 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3633 } 3634 #endif 3635 #endif 3636 3637 #ifdef ENABLE_BLE 3638 #ifdef ENABLE_LE_PERIPHERAL 3639 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3640 hci_stack->le_random_address_set = 1; 3641 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3642 } 3643 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3644 hci_stack->le_advertisements_active = packet[3]; 3645 } 3646 #endif 3647 #ifdef ENABLE_LE_CENTRAL 3648 if (IS_COMMAND(packet, hci_le_create_connection)){ 3649 // white list used? 3650 uint8_t initiator_filter_policy = packet[7]; 3651 switch (initiator_filter_policy){ 3652 case 0: 3653 // whitelist not used 3654 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3655 break; 3656 case 1: 3657 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3658 break; 3659 default: 3660 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3661 break; 3662 } 3663 } 3664 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3665 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3666 } 3667 #endif 3668 #endif 3669 3670 hci_stack->num_cmd_packets--; 3671 3672 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3673 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3674 3675 // release packet buffer for synchronous transport implementations 3676 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3677 hci_stack->hci_packet_buffer_reserved = 0; 3678 } 3679 3680 return err; 3681 } 3682 3683 // disconnect because of security block 3684 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3685 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3686 if (!connection) return; 3687 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3688 } 3689 3690 3691 // Configure Secure Simple Pairing 3692 3693 #ifdef ENABLE_CLASSIC 3694 3695 // enable will enable SSP during init 3696 void gap_ssp_set_enable(int enable){ 3697 hci_stack->ssp_enable = enable; 3698 } 3699 3700 static int hci_local_ssp_activated(void){ 3701 return gap_ssp_supported() && hci_stack->ssp_enable; 3702 } 3703 3704 // if set, BTstack will respond to io capability request using authentication requirement 3705 void gap_ssp_set_io_capability(int io_capability){ 3706 hci_stack->ssp_io_capability = io_capability; 3707 } 3708 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3709 hci_stack->ssp_authentication_requirement = authentication_requirement; 3710 } 3711 3712 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3713 void gap_ssp_set_auto_accept(int auto_accept){ 3714 hci_stack->ssp_auto_accept = auto_accept; 3715 } 3716 #endif 3717 3718 // va_list part of hci_send_cmd 3719 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3720 if (!hci_can_send_command_packet_now()){ 3721 log_error("hci_send_cmd called but cannot send packet now"); 3722 return 0; 3723 } 3724 3725 // for HCI INITIALIZATION 3726 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3727 hci_stack->last_cmd_opcode = cmd->opcode; 3728 3729 hci_reserve_packet_buffer(); 3730 uint8_t * packet = hci_stack->hci_packet_buffer; 3731 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3732 return hci_send_cmd_packet(packet, size); 3733 } 3734 3735 /** 3736 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3737 */ 3738 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3739 va_list argptr; 3740 va_start(argptr, cmd); 3741 int res = hci_send_cmd_va_arg(cmd, argptr); 3742 va_end(argptr); 3743 return res; 3744 } 3745 3746 // Create various non-HCI events. 3747 // TODO: generalize, use table similar to hci_create_command 3748 3749 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3750 // dump packet 3751 if (dump) { 3752 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3753 } 3754 3755 // dispatch to all event handlers 3756 btstack_linked_list_iterator_t it; 3757 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3758 while (btstack_linked_list_iterator_has_next(&it)){ 3759 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3760 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3761 } 3762 } 3763 3764 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3765 if (!hci_stack->acl_packet_handler) return; 3766 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3767 } 3768 3769 #ifdef ENABLE_CLASSIC 3770 static void hci_notify_if_sco_can_send_now(void){ 3771 // notify SCO sender if waiting 3772 if (!hci_stack->sco_waiting_for_can_send_now) return; 3773 if (hci_can_send_sco_packet_now()){ 3774 hci_stack->sco_waiting_for_can_send_now = 0; 3775 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3776 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3777 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3778 } 3779 } 3780 3781 // parsing end emitting has been merged to reduce code size 3782 static void gap_inquiry_explode(uint8_t * packet){ 3783 uint8_t event[15+GAP_INQUIRY_MAX_NAME_LEN]; 3784 3785 uint8_t * eir_data; 3786 ad_context_t context; 3787 const uint8_t * name; 3788 uint8_t name_len; 3789 3790 int event_type = hci_event_packet_get_type(packet); 3791 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 3792 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 3793 3794 // event[1] is set at the end 3795 int i; 3796 for (i=0; i<num_responses;i++){ 3797 memset(event, 0, sizeof(event)); 3798 event[0] = GAP_EVENT_INQUIRY_RESULT; 3799 uint8_t event_size = 18; // if name is not set by EIR 3800 3801 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 3802 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 3803 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 3804 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 3805 3806 switch (event_type){ 3807 case HCI_EVENT_INQUIRY_RESULT: 3808 // 14,15,16,17 = 0, size 18 3809 break; 3810 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3811 event[14] = 1; 3812 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3813 // 16,17 = 0, size 18 3814 break; 3815 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3816 event[14] = 1; 3817 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3818 // for EIR packets, there is only one reponse in it 3819 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 3820 name = NULL; 3821 // EIR data is 240 bytes in EIR event 3822 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 3823 uint8_t data_type = ad_iterator_get_data_type(&context); 3824 uint8_t data_size = ad_iterator_get_data_len(&context); 3825 const uint8_t * data = ad_iterator_get_data(&context); 3826 // Prefer Complete Local Name over Shortend Local Name 3827 switch (data_type){ 3828 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 3829 if (name) continue; 3830 /* explicit fall-through */ 3831 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 3832 name = data; 3833 name_len = data_size; 3834 break; 3835 default: 3836 break; 3837 } 3838 } 3839 if (name){ 3840 event[16] = 1; 3841 // truncate name if needed 3842 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 3843 event[17] = len; 3844 memcpy(&event[18], name, len); 3845 event_size += len; 3846 } 3847 break; 3848 } 3849 event[1] = event_size - 2; 3850 hci_emit_event(event, event_size, 1); 3851 } 3852 } 3853 #endif 3854 3855 void hci_emit_state(void){ 3856 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3857 uint8_t event[3]; 3858 event[0] = BTSTACK_EVENT_STATE; 3859 event[1] = sizeof(event) - 2; 3860 event[2] = hci_stack->state; 3861 hci_emit_event(event, sizeof(event), 1); 3862 } 3863 3864 #ifdef ENABLE_CLASSIC 3865 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3866 uint8_t event[13]; 3867 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3868 event[1] = sizeof(event) - 2; 3869 event[2] = status; 3870 little_endian_store_16(event, 3, con_handle); 3871 reverse_bd_addr(address, &event[5]); 3872 event[11] = 1; // ACL connection 3873 event[12] = 0; // encryption disabled 3874 hci_emit_event(event, sizeof(event), 1); 3875 } 3876 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3877 if (disable_l2cap_timeouts) return; 3878 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3879 uint8_t event[4]; 3880 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3881 event[1] = sizeof(event) - 2; 3882 little_endian_store_16(event, 2, conn->con_handle); 3883 hci_emit_event(event, sizeof(event), 1); 3884 } 3885 #endif 3886 3887 #ifdef ENABLE_BLE 3888 #ifdef ENABLE_LE_CENTRAL 3889 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3890 uint8_t event[21]; 3891 event[0] = HCI_EVENT_LE_META; 3892 event[1] = sizeof(event) - 2; 3893 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3894 event[3] = status; 3895 little_endian_store_16(event, 4, con_handle); 3896 event[6] = 0; // TODO: role 3897 event[7] = address_type; 3898 reverse_bd_addr(address, &event[8]); 3899 little_endian_store_16(event, 14, 0); // interval 3900 little_endian_store_16(event, 16, 0); // latency 3901 little_endian_store_16(event, 18, 0); // supervision timeout 3902 event[20] = 0; // master clock accuracy 3903 hci_emit_event(event, sizeof(event), 1); 3904 } 3905 #endif 3906 #endif 3907 3908 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3909 uint8_t event[6]; 3910 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3911 event[1] = sizeof(event) - 2; 3912 event[2] = 0; // status = OK 3913 little_endian_store_16(event, 3, con_handle); 3914 event[5] = reason; 3915 hci_emit_event(event, sizeof(event), 1); 3916 } 3917 3918 static void hci_emit_nr_connections_changed(void){ 3919 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3920 uint8_t event[3]; 3921 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3922 event[1] = sizeof(event) - 2; 3923 event[2] = nr_hci_connections(); 3924 hci_emit_event(event, sizeof(event), 1); 3925 } 3926 3927 static void hci_emit_hci_open_failed(void){ 3928 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3929 uint8_t event[2]; 3930 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3931 event[1] = sizeof(event) - 2; 3932 hci_emit_event(event, sizeof(event), 1); 3933 } 3934 3935 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3936 log_info("hci_emit_dedicated_bonding_result %u ", status); 3937 uint8_t event[9]; 3938 int pos = 0; 3939 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3940 event[pos++] = sizeof(event) - 2; 3941 event[pos++] = status; 3942 reverse_bd_addr(address, &event[pos]); 3943 hci_emit_event(event, sizeof(event), 1); 3944 } 3945 3946 3947 #ifdef ENABLE_CLASSIC 3948 3949 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3950 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3951 uint8_t event[5]; 3952 int pos = 0; 3953 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3954 event[pos++] = sizeof(event) - 2; 3955 little_endian_store_16(event, 2, con_handle); 3956 pos += 2; 3957 event[pos++] = level; 3958 hci_emit_event(event, sizeof(event), 1); 3959 } 3960 3961 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3962 if (!connection) return LEVEL_0; 3963 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3964 return gap_security_level_for_link_key_type(connection->link_key_type); 3965 } 3966 3967 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3968 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3969 uint8_t event[3]; 3970 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3971 event[1] = sizeof(event) - 2; 3972 event[2] = enabled; 3973 hci_emit_event(event, sizeof(event), 1); 3974 } 3975 3976 #ifdef ENABLE_CLASSIC 3977 // query if remote side supports eSCO 3978 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3979 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3980 if (!connection) return 0; 3981 return connection->remote_supported_feature_eSCO; 3982 } 3983 3984 // query if remote side supports SSP 3985 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3986 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3987 if (!connection) return 0; 3988 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3989 } 3990 3991 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3992 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3993 } 3994 #endif 3995 3996 // GAP API 3997 /** 3998 * @bbrief enable/disable bonding. default is enabled 3999 * @praram enabled 4000 */ 4001 void gap_set_bondable_mode(int enable){ 4002 hci_stack->bondable = enable ? 1 : 0; 4003 } 4004 /** 4005 * @brief Get bondable mode. 4006 * @return 1 if bondable 4007 */ 4008 int gap_get_bondable_mode(void){ 4009 return hci_stack->bondable; 4010 } 4011 4012 /** 4013 * @brief map link keys to security levels 4014 */ 4015 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4016 switch (link_key_type){ 4017 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4018 return LEVEL_4; 4019 case COMBINATION_KEY: 4020 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4021 return LEVEL_3; 4022 default: 4023 return LEVEL_2; 4024 } 4025 } 4026 4027 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4028 log_info("gap_mitm_protection_required_for_security_level %u", level); 4029 return level > LEVEL_2; 4030 } 4031 4032 /** 4033 * @brief get current security level 4034 */ 4035 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4036 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4037 if (!connection) return LEVEL_0; 4038 return gap_security_level_for_connection(connection); 4039 } 4040 4041 /** 4042 * @brief request connection to device to 4043 * @result GAP_AUTHENTICATION_RESULT 4044 */ 4045 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4046 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4047 if (!connection){ 4048 hci_emit_security_level(con_handle, LEVEL_0); 4049 return; 4050 } 4051 gap_security_level_t current_level = gap_security_level(con_handle); 4052 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 4053 if (current_level >= requested_level){ 4054 hci_emit_security_level(con_handle, current_level); 4055 return; 4056 } 4057 4058 connection->requested_security_level = requested_level; 4059 4060 #if 0 4061 // sending encryption request without a link key results in an error. 4062 // TODO: figure out how to use it properly 4063 4064 // would enabling ecnryption suffice (>= LEVEL_2)? 4065 if (hci_stack->link_key_db){ 4066 link_key_type_t link_key_type; 4067 link_key_t link_key; 4068 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4069 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4070 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4071 return; 4072 } 4073 } 4074 } 4075 #endif 4076 4077 // try to authenticate connection 4078 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4079 hci_run(); 4080 } 4081 4082 /** 4083 * @brief start dedicated bonding with device. disconnect after bonding 4084 * @param device 4085 * @param request MITM protection 4086 * @result GAP_DEDICATED_BONDING_COMPLETE 4087 */ 4088 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4089 4090 // create connection state machine 4091 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 4092 4093 if (!connection){ 4094 return BTSTACK_MEMORY_ALLOC_FAILED; 4095 } 4096 4097 // delete linkn key 4098 gap_drop_link_key_for_bd_addr(device); 4099 4100 // configure LEVEL_2/3, dedicated bonding 4101 connection->state = SEND_CREATE_CONNECTION; 4102 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4103 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4104 connection->bonding_flags = BONDING_DEDICATED; 4105 4106 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4107 4108 // handle: connnection failure (connection complete != ok) 4109 // handle: authentication failure 4110 // handle: disconnect on done 4111 4112 hci_run(); 4113 4114 return 0; 4115 } 4116 #endif 4117 4118 void gap_set_local_name(const char * local_name){ 4119 hci_stack->local_name = local_name; 4120 } 4121 4122 4123 #ifdef ENABLE_BLE 4124 4125 #ifdef ENABLE_LE_CENTRAL 4126 void gap_start_scan(void){ 4127 hci_stack->le_scanning_enabled = 1; 4128 hci_run(); 4129 } 4130 4131 void gap_stop_scan(void){ 4132 hci_stack->le_scanning_enabled = 0; 4133 hci_run(); 4134 } 4135 4136 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4137 hci_stack->le_scan_type = scan_type; 4138 hci_stack->le_scan_interval = scan_interval; 4139 hci_stack->le_scan_window = scan_window; 4140 hci_run(); 4141 } 4142 4143 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4144 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4145 if (!conn){ 4146 log_info("gap_connect: no connection exists yet, creating context"); 4147 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4148 if (!conn){ 4149 // notify client that alloc failed 4150 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4151 log_info("gap_connect: failed to alloc hci_connection_t"); 4152 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4153 } 4154 conn->state = SEND_CREATE_CONNECTION; 4155 log_info("gap_connect: send create connection next"); 4156 hci_run(); 4157 return 0; 4158 } 4159 4160 if (!hci_is_le_connection(conn) || 4161 conn->state == SEND_CREATE_CONNECTION || 4162 conn->state == SENT_CREATE_CONNECTION) { 4163 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4164 log_error("gap_connect: classic connection or connect is already being created"); 4165 return GATT_CLIENT_IN_WRONG_STATE; 4166 } 4167 4168 log_info("gap_connect: context exists with state %u", conn->state); 4169 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4170 hci_run(); 4171 return 0; 4172 } 4173 4174 // @assumption: only a single outgoing LE Connection exists 4175 static hci_connection_t * gap_get_outgoing_connection(void){ 4176 btstack_linked_item_t *it; 4177 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4178 hci_connection_t * conn = (hci_connection_t *) it; 4179 if (!hci_is_le_connection(conn)) continue; 4180 switch (conn->state){ 4181 case SEND_CREATE_CONNECTION: 4182 case SENT_CREATE_CONNECTION: 4183 case SENT_CANCEL_CONNECTION: 4184 return conn; 4185 default: 4186 break; 4187 }; 4188 } 4189 return NULL; 4190 } 4191 4192 uint8_t gap_connect_cancel(void){ 4193 hci_connection_t * conn = gap_get_outgoing_connection(); 4194 if (!conn) return 0; 4195 switch (conn->state){ 4196 case SEND_CREATE_CONNECTION: 4197 // skip sending create connection and emit event instead 4198 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4199 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4200 btstack_memory_hci_connection_free( conn ); 4201 break; 4202 case SENT_CREATE_CONNECTION: 4203 // request to send cancel connection 4204 conn->state = SEND_CANCEL_CONNECTION; 4205 hci_run(); 4206 break; 4207 default: 4208 break; 4209 } 4210 return 0; 4211 } 4212 #endif 4213 4214 #ifdef ENABLE_LE_CENTRAL 4215 /** 4216 * @brief Set connection parameters for outgoing connections 4217 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4218 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4219 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4220 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4221 * @param conn_latency, default: 4 4222 * @param supervision_timeout (unit: 10ms), default: 720 ms 4223 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4224 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4225 */ 4226 4227 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4228 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4229 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4230 hci_stack->le_connection_scan_interval = conn_scan_interval; 4231 hci_stack->le_connection_scan_window = conn_scan_window; 4232 hci_stack->le_connection_interval_min = conn_interval_min; 4233 hci_stack->le_connection_interval_max = conn_interval_max; 4234 hci_stack->le_connection_latency = conn_latency; 4235 hci_stack->le_supervision_timeout = supervision_timeout; 4236 hci_stack->le_minimum_ce_length = min_ce_length; 4237 hci_stack->le_maximum_ce_length = max_ce_length; 4238 } 4239 #endif 4240 4241 /** 4242 * @brief Updates the connection parameters for a given LE connection 4243 * @param handle 4244 * @param conn_interval_min (unit: 1.25ms) 4245 * @param conn_interval_max (unit: 1.25ms) 4246 * @param conn_latency 4247 * @param supervision_timeout (unit: 10ms) 4248 * @returns 0 if ok 4249 */ 4250 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4251 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4252 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4253 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4254 connection->le_conn_interval_min = conn_interval_min; 4255 connection->le_conn_interval_max = conn_interval_max; 4256 connection->le_conn_latency = conn_latency; 4257 connection->le_supervision_timeout = supervision_timeout; 4258 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4259 hci_run(); 4260 return 0; 4261 } 4262 4263 /** 4264 * @brief Request an update of the connection parameter for a given LE connection 4265 * @param handle 4266 * @param conn_interval_min (unit: 1.25ms) 4267 * @param conn_interval_max (unit: 1.25ms) 4268 * @param conn_latency 4269 * @param supervision_timeout (unit: 10ms) 4270 * @returns 0 if ok 4271 */ 4272 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4273 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4274 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4275 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4276 connection->le_conn_interval_min = conn_interval_min; 4277 connection->le_conn_interval_max = conn_interval_max; 4278 connection->le_conn_latency = conn_latency; 4279 connection->le_supervision_timeout = supervision_timeout; 4280 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4281 hci_run(); 4282 return 0; 4283 } 4284 4285 #ifdef ENABLE_LE_PERIPHERAL 4286 4287 static void gap_advertisments_changed(void){ 4288 // disable advertisements before updating adv, scan data, or adv params 4289 if (hci_stack->le_advertisements_active){ 4290 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4291 } 4292 hci_run(); 4293 } 4294 4295 /** 4296 * @brief Set Advertisement Data 4297 * @param advertising_data_length 4298 * @param advertising_data (max 31 octets) 4299 * @note data is not copied, pointer has to stay valid 4300 */ 4301 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4302 hci_stack->le_advertisements_data_len = advertising_data_length; 4303 hci_stack->le_advertisements_data = advertising_data; 4304 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4305 gap_advertisments_changed(); 4306 } 4307 4308 /** 4309 * @brief Set Scan Response Data 4310 * @param advertising_data_length 4311 * @param advertising_data (max 31 octets) 4312 * @note data is not copied, pointer has to stay valid 4313 */ 4314 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4315 hci_stack->le_scan_response_data_len = scan_response_data_length; 4316 hci_stack->le_scan_response_data = scan_response_data; 4317 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4318 gap_advertisments_changed(); 4319 } 4320 4321 /** 4322 * @brief Set Advertisement Parameters 4323 * @param adv_int_min 4324 * @param adv_int_max 4325 * @param adv_type 4326 * @param direct_address_type 4327 * @param direct_address 4328 * @param channel_map 4329 * @param filter_policy 4330 * 4331 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4332 */ 4333 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4334 uint8_t direct_address_typ, bd_addr_t direct_address, 4335 uint8_t channel_map, uint8_t filter_policy) { 4336 4337 hci_stack->le_advertisements_interval_min = adv_int_min; 4338 hci_stack->le_advertisements_interval_max = adv_int_max; 4339 hci_stack->le_advertisements_type = adv_type; 4340 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4341 hci_stack->le_advertisements_channel_map = channel_map; 4342 hci_stack->le_advertisements_filter_policy = filter_policy; 4343 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4344 4345 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4346 gap_advertisments_changed(); 4347 } 4348 4349 /** 4350 * @brief Enable/Disable Advertisements 4351 * @param enabled 4352 */ 4353 void gap_advertisements_enable(int enabled){ 4354 hci_stack->le_advertisements_enabled = enabled; 4355 if (enabled && !hci_stack->le_advertisements_active){ 4356 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4357 } 4358 if (!enabled && hci_stack->le_advertisements_active){ 4359 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4360 } 4361 hci_run(); 4362 } 4363 4364 #endif 4365 4366 void hci_le_set_own_address_type(uint8_t own_address_type){ 4367 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4368 if (own_address_type == hci_stack->le_own_addr_type) return; 4369 hci_stack->le_own_addr_type = own_address_type; 4370 4371 #ifdef ENABLE_LE_PERIPHERAL 4372 // update advertisement parameters, too 4373 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4374 gap_advertisments_changed(); 4375 #endif 4376 #ifdef ENABLE_LE_CENTRAL 4377 // note: we don't update scan parameters or modify ongoing connection attempts 4378 #endif 4379 } 4380 4381 #endif 4382 4383 uint8_t gap_disconnect(hci_con_handle_t handle){ 4384 hci_connection_t * conn = hci_connection_for_handle(handle); 4385 if (!conn){ 4386 hci_emit_disconnection_complete(handle, 0); 4387 return 0; 4388 } 4389 // ignore if already disconnected 4390 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4391 return 0; 4392 } 4393 conn->state = SEND_DISCONNECT; 4394 hci_run(); 4395 return 0; 4396 } 4397 4398 /** 4399 * @brief Get connection type 4400 * @param con_handle 4401 * @result connection_type 4402 */ 4403 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4404 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4405 if (!conn) return GAP_CONNECTION_INVALID; 4406 switch (conn->address_type){ 4407 case BD_ADDR_TYPE_LE_PUBLIC: 4408 case BD_ADDR_TYPE_LE_RANDOM: 4409 return GAP_CONNECTION_LE; 4410 case BD_ADDR_TYPE_SCO: 4411 return GAP_CONNECTION_SCO; 4412 case BD_ADDR_TYPE_CLASSIC: 4413 return GAP_CONNECTION_ACL; 4414 default: 4415 return GAP_CONNECTION_INVALID; 4416 } 4417 } 4418 4419 #ifdef ENABLE_BLE 4420 4421 #ifdef ENABLE_LE_CENTRAL 4422 /** 4423 * @brief Auto Connection Establishment - Start Connecting to device 4424 * @param address_typ 4425 * @param address 4426 * @returns 0 if ok 4427 */ 4428 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4429 // check capacity 4430 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4431 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4432 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4433 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4434 entry->address_type = address_type; 4435 memcpy(entry->address, address, 6); 4436 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4437 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4438 hci_run(); 4439 return 0; 4440 } 4441 4442 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4443 btstack_linked_list_iterator_t it; 4444 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4445 while (btstack_linked_list_iterator_has_next(&it)){ 4446 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4447 if (entry->address_type != address_type) continue; 4448 if (memcmp(entry->address, address, 6) != 0) continue; 4449 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4450 // remove from controller if already present 4451 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4452 continue; 4453 } 4454 // direclty remove entry from whitelist 4455 btstack_linked_list_iterator_remove(&it); 4456 btstack_memory_whitelist_entry_free(entry); 4457 } 4458 } 4459 4460 /** 4461 * @brief Auto Connection Establishment - Stop Connecting to device 4462 * @param address_typ 4463 * @param address 4464 * @returns 0 if ok 4465 */ 4466 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4467 hci_remove_from_whitelist(address_type, address); 4468 hci_run(); 4469 return 0; 4470 } 4471 4472 /** 4473 * @brief Auto Connection Establishment - Stop everything 4474 * @note Convenience function to stop all active auto connection attempts 4475 */ 4476 void gap_auto_connection_stop_all(void){ 4477 btstack_linked_list_iterator_t it; 4478 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4479 while (btstack_linked_list_iterator_has_next(&it)){ 4480 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4481 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4482 // remove from controller if already present 4483 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4484 continue; 4485 } 4486 // directly remove entry from whitelist 4487 btstack_linked_list_iterator_remove(&it); 4488 btstack_memory_whitelist_entry_free(entry); 4489 } 4490 hci_run(); 4491 } 4492 #endif 4493 #endif 4494 4495 #ifdef ENABLE_CLASSIC 4496 /** 4497 * @brief Set Extended Inquiry Response data 4498 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4499 * @note has to be done before stack starts up 4500 */ 4501 void gap_set_extended_inquiry_response(const uint8_t * data){ 4502 hci_stack->eir_data = data; 4503 } 4504 4505 /** 4506 * @brief Start GAP Classic Inquiry 4507 * @param duration in 1.28s units 4508 * @return 0 if ok 4509 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4510 */ 4511 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4512 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4513 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4514 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4515 } 4516 hci_stack->inquiry_state = duration_in_1280ms_units; 4517 hci_run(); 4518 return 0; 4519 } 4520 4521 /** 4522 * @brief Stop GAP Classic Inquiry 4523 * @returns 0 if ok 4524 */ 4525 int gap_inquiry_stop(void){ 4526 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN || hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4527 // emit inquiry complete event, before it even started 4528 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4529 hci_emit_event(event, sizeof(event), 1); 4530 return 0; 4531 } 4532 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4533 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4534 hci_run(); 4535 return 0; 4536 } 4537 4538 4539 /** 4540 * @brief Remote Name Request 4541 * @param addr 4542 * @param page_scan_repetition_mode 4543 * @param clock_offset only used when bit 15 is set 4544 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4545 */ 4546 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4547 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4548 memcpy(hci_stack->remote_name_addr, addr, 6); 4549 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4550 hci_stack->remote_name_clock_offset = clock_offset; 4551 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4552 hci_run(); 4553 return 0; 4554 } 4555 4556 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4557 hci_stack->gap_pairing_state = state; 4558 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4559 hci_run(); 4560 return 0; 4561 } 4562 4563 /** 4564 * @brief Legacy Pairing Pin Code Response 4565 * @param addr 4566 * @param pin 4567 * @return 0 if ok 4568 */ 4569 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4570 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4571 hci_stack->gap_pairing_pin = pin; 4572 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4573 } 4574 4575 /** 4576 * @brief Abort Legacy Pairing 4577 * @param addr 4578 * @param pin 4579 * @return 0 if ok 4580 */ 4581 int gap_pin_code_negative(bd_addr_t addr){ 4582 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4583 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4584 } 4585 4586 /** 4587 * @brief SSP Passkey Response 4588 * @param addr 4589 * @param passkey 4590 * @return 0 if ok 4591 */ 4592 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4593 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4594 hci_stack->gap_pairing_passkey = passkey; 4595 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4596 } 4597 4598 /** 4599 * @brief Abort SSP Passkey Entry/Pairing 4600 * @param addr 4601 * @param pin 4602 * @return 0 if ok 4603 */ 4604 int gap_ssp_passkey_negative(bd_addr_t addr){ 4605 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4606 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 4607 } 4608 4609 /** 4610 * @brief Accept SSP Numeric Comparison 4611 * @param addr 4612 * @param passkey 4613 * @return 0 if ok 4614 */ 4615 int gap_ssp_confirmation_response(bd_addr_t addr){ 4616 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4617 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 4618 } 4619 4620 /** 4621 * @brief Abort SSP Numeric Comparison/Pairing 4622 * @param addr 4623 * @param pin 4624 * @return 0 if ok 4625 */ 4626 int gap_ssp_confirmation_negative(bd_addr_t addr){ 4627 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4628 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 4629 } 4630 4631 /** 4632 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4633 * @param inquiry_mode see bluetooth_defines.h 4634 */ 4635 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4636 hci_stack->inquiry_mode = mode; 4637 } 4638 4639 /** 4640 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4641 */ 4642 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4643 hci_stack->sco_voice_setting = voice_setting; 4644 } 4645 4646 /** 4647 * @brief Get SCO Voice Setting 4648 * @return current voice setting 4649 */ 4650 uint16_t hci_get_sco_voice_setting(void){ 4651 return hci_stack->sco_voice_setting; 4652 } 4653 4654 /** @brief Get SCO packet length for current SCO Voice setting 4655 * @note Using SCO packets of the exact length is required for USB transfer 4656 * @return Length of SCO packets in bytes (not audio frames) 4657 */ 4658 int hci_get_sco_packet_length(void){ 4659 // see Core Spec for H2 USB Transfer. 4660 if (hci_stack->sco_voice_setting & 0x0020) return 51; 4661 return 27; 4662 } 4663 4664 /** 4665 * @brief Sets the master/slave policy 4666 * @param policy (0: attempt to become master, 1: let connecting device decide) 4667 */ 4668 void hci_set_master_slave_policy(uint8_t policy){ 4669 hci_stack->master_slave_policy = policy; 4670 } 4671 4672 #endif 4673 4674 HCI_STATE hci_get_state(void){ 4675 return hci_stack->state; 4676 } 4677 4678 4679 /** 4680 * @brief Set callback for Bluetooth Hardware Error 4681 */ 4682 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 4683 hci_stack->hardware_error_callback = fn; 4684 } 4685 4686 void hci_disconnect_all(void){ 4687 btstack_linked_list_iterator_t it; 4688 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4689 while (btstack_linked_list_iterator_has_next(&it)){ 4690 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4691 if (con->state == SENT_DISCONNECT) continue; 4692 con->state = SEND_DISCONNECT; 4693 } 4694 hci_run(); 4695 } 4696 4697 uint16_t hci_get_manufacturer(void){ 4698 return hci_stack->manufacturer; 4699 } 4700 4701 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 4702 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 4703 if (!hci_con) return NULL; 4704 return &hci_con->sm_connection; 4705 } 4706 4707 #ifdef ENABLE_BLE 4708 4709 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 4710 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 4711 4712 int gap_encryption_key_size(hci_con_handle_t con_handle){ 4713 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4714 if (!sm_conn) return 0; // wrong connection 4715 if (!sm_conn->sm_connection_encrypted) return 0; 4716 return sm_conn->sm_actual_encryption_key_size; 4717 } 4718 4719 int gap_authenticated(hci_con_handle_t con_handle){ 4720 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4721 if (!sm_conn) return 0; // wrong connection 4722 if (!sm_conn->sm_connection_encrypted) return 0; // unencrypted connection cannot be authenticated 4723 return sm_conn->sm_connection_authenticated; 4724 } 4725 4726 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 4727 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4728 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 4729 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 4730 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 4731 return sm_conn->sm_connection_authorization_state; 4732 } 4733 #endif 4734