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