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