1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #endif 63 64 #include <stdarg.h> 65 #include <string.h> 66 #include <stdio.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 #define HCI_RESET_RESEND_TIMEOUT_MS 200 98 99 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 100 #ifndef GAP_INQUIRY_MAX_NAME_LEN 101 #define GAP_INQUIRY_MAX_NAME_LEN 32 102 #endif 103 104 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 105 #define GAP_INQUIRY_DURATION_MIN 0x01 106 #define GAP_INQUIRY_DURATION_MAX 0x30 107 #define GAP_INQUIRY_STATE_ACTIVE 0x80 108 #define GAP_INQUIRY_STATE_IDLE 0 109 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 110 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 111 112 // GAP Remote Name Request 113 #define GAP_REMOTE_NAME_STATE_IDLE 0 114 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 115 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 116 117 // GAP Pairing 118 #define GAP_PAIRING_STATE_IDLE 0 119 #define GAP_PAIRING_STATE_SEND_PIN 1 120 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 121 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 122 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 123 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 124 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 125 126 127 // prototypes 128 #ifdef ENABLE_CLASSIC 129 static void hci_update_scan_enable(void); 130 static void hci_emit_discoverable_enabled(uint8_t enabled); 131 static int hci_local_ssp_activated(void); 132 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 133 static void hci_notify_if_sco_can_send_now(void); 134 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 135 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 136 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 137 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 138 static void hci_connection_timestamp(hci_connection_t *connection); 139 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 140 static void gap_inquiry_explode(uint8_t * packet); 141 #endif 142 143 static int hci_power_control_on(void); 144 static void hci_power_control_off(void); 145 static void hci_state_reset(void); 146 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 147 static void hci_emit_nr_connections_changed(void); 148 static void hci_emit_hci_open_failed(void); 149 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 150 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 151 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 152 static void hci_run(void); 153 static int hci_is_le_connection(hci_connection_t * connection); 154 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 155 156 #ifdef ENABLE_BLE 157 #ifdef ENABLE_LE_CENTRAL 158 // called from test/ble_client/advertising_data_parser.c 159 void le_handle_advertisement_report(uint8_t *packet, int size); 160 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 161 #endif 162 #endif 163 164 // the STACK is here 165 #ifndef HAVE_MALLOC 166 static hci_stack_t hci_stack_static; 167 #endif 168 static hci_stack_t * hci_stack = NULL; 169 170 #ifdef ENABLE_CLASSIC 171 // test helper 172 static uint8_t disable_l2cap_timeouts = 0; 173 #endif 174 175 /** 176 * create connection for given address 177 * 178 * @return connection OR NULL, if no memory left 179 */ 180 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 181 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 182 hci_connection_t * conn = btstack_memory_hci_connection_get(); 183 if (!conn) return NULL; 184 memset(conn, 0, sizeof(hci_connection_t)); 185 bd_addr_copy(conn->address, addr); 186 conn->address_type = addr_type; 187 conn->con_handle = 0xffff; 188 conn->authentication_flags = AUTH_FLAGS_NONE; 189 conn->bonding_flags = 0; 190 conn->requested_security_level = LEVEL_0; 191 #ifdef ENABLE_CLASSIC 192 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 193 btstack_run_loop_set_timer_context(&conn->timeout, conn); 194 hci_connection_timestamp(conn); 195 #endif 196 conn->acl_recombination_length = 0; 197 conn->acl_recombination_pos = 0; 198 conn->num_acl_packets_sent = 0; 199 conn->num_sco_packets_sent = 0; 200 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 201 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 202 return conn; 203 } 204 205 206 /** 207 * get le connection parameter range 208 * 209 * @return le connection parameter range struct 210 */ 211 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 212 *range = hci_stack->le_connection_parameter_range; 213 } 214 215 /** 216 * set le connection parameter range 217 * 218 */ 219 220 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 221 hci_stack->le_connection_parameter_range = *range; 222 } 223 224 /** 225 * get hci connections iterator 226 * 227 * @return hci connections iterator 228 */ 229 230 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 231 btstack_linked_list_iterator_init(it, &hci_stack->connections); 232 } 233 234 /** 235 * get connection for a given handle 236 * 237 * @return connection OR NULL, if not found 238 */ 239 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 240 btstack_linked_list_iterator_t it; 241 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 242 while (btstack_linked_list_iterator_has_next(&it)){ 243 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 244 if ( item->con_handle == con_handle ) { 245 return item; 246 } 247 } 248 return NULL; 249 } 250 251 /** 252 * get connection for given address 253 * 254 * @return connection OR NULL, if not found 255 */ 256 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 257 btstack_linked_list_iterator_t it; 258 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 259 while (btstack_linked_list_iterator_has_next(&it)){ 260 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 261 if (connection->address_type != addr_type) continue; 262 if (memcmp(addr, connection->address, 6) != 0) continue; 263 return connection; 264 } 265 return NULL; 266 } 267 268 269 #ifdef ENABLE_CLASSIC 270 271 #ifdef ENABLE_SCO_OVER_HCI 272 static int hci_number_sco_connections(void){ 273 int connections = 0; 274 btstack_linked_list_iterator_t it; 275 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 276 while (btstack_linked_list_iterator_has_next(&it)){ 277 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 278 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 279 connections++; 280 } 281 return connections; 282 } 283 #endif 284 285 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 286 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 287 #ifdef HAVE_EMBEDDED_TICK 288 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 289 // connections might be timed out 290 hci_emit_l2cap_check_timeout(connection); 291 } 292 #else 293 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 294 // connections might be timed out 295 hci_emit_l2cap_check_timeout(connection); 296 } 297 #endif 298 } 299 300 static void hci_connection_timestamp(hci_connection_t *connection){ 301 #ifdef HAVE_EMBEDDED_TICK 302 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 303 #else 304 connection->timestamp = btstack_run_loop_get_time_ms(); 305 #endif 306 } 307 308 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 309 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 310 } 311 312 313 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 314 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 315 } 316 317 /** 318 * add authentication flags and reset timer 319 * @note: assumes classic connection 320 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 321 */ 322 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 323 bd_addr_t addr; 324 reverse_bd_addr(bd_addr, addr); 325 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 326 if (conn) { 327 connectionSetAuthenticationFlags(conn, flags); 328 hci_connection_timestamp(conn); 329 } 330 } 331 332 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 333 hci_connection_t * conn = hci_connection_for_handle(handle); 334 if (!conn) return 0; 335 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 336 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 337 return 0; 338 } 339 340 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 341 if (!hci_stack->link_key_db) return; 342 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 343 hci_stack->link_key_db->delete_link_key(addr); 344 } 345 346 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 347 if (!hci_stack->link_key_db) return; 348 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 349 hci_stack->link_key_db->put_link_key(addr, link_key, type); 350 } 351 #endif 352 353 static int hci_is_le_connection(hci_connection_t * connection){ 354 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 355 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 356 } 357 358 /** 359 * count connections 360 */ 361 static int nr_hci_connections(void){ 362 int count = 0; 363 btstack_linked_item_t *it; 364 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 365 return count; 366 } 367 368 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 369 370 unsigned int num_packets_sent_classic = 0; 371 unsigned int num_packets_sent_le = 0; 372 373 btstack_linked_item_t *it; 374 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 375 hci_connection_t * connection = (hci_connection_t *) it; 376 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 377 num_packets_sent_classic += connection->num_acl_packets_sent; 378 } else { 379 num_packets_sent_le += connection->num_acl_packets_sent; 380 } 381 } 382 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 383 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 384 int free_slots_le = 0; 385 386 if (free_slots_classic < 0){ 387 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 388 return 0; 389 } 390 391 if (hci_stack->le_acl_packets_total_num){ 392 // if we have LE slots, they are used 393 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 394 if (free_slots_le < 0){ 395 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 396 return 0; 397 } 398 } else { 399 // otherwise, classic slots are used for LE, too 400 free_slots_classic -= num_packets_sent_le; 401 if (free_slots_classic < 0){ 402 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 403 return 0; 404 } 405 } 406 407 switch (address_type){ 408 case BD_ADDR_TYPE_UNKNOWN: 409 log_error("hci_number_free_acl_slots: unknown address type"); 410 return 0; 411 412 case BD_ADDR_TYPE_CLASSIC: 413 return free_slots_classic; 414 415 default: 416 if (hci_stack->le_acl_packets_total_num){ 417 return free_slots_le; 418 } 419 return free_slots_classic; 420 } 421 } 422 423 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 424 // get connection type 425 hci_connection_t * connection = hci_connection_for_handle(con_handle); 426 if (!connection){ 427 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 428 return 0; 429 } 430 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 431 } 432 433 #ifdef ENABLE_CLASSIC 434 static int hci_number_free_sco_slots(void){ 435 unsigned int num_sco_packets_sent = 0; 436 btstack_linked_item_t *it; 437 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 438 hci_connection_t * connection = (hci_connection_t *) it; 439 num_sco_packets_sent += connection->num_sco_packets_sent; 440 } 441 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 442 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 443 return 0; 444 } 445 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 446 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 447 } 448 #endif 449 450 // only used to send HCI Host Number Completed Packets 451 static int hci_can_send_comand_packet_transport(void){ 452 if (hci_stack->hci_packet_buffer_reserved) return 0; 453 454 // check for async hci transport implementations 455 if (hci_stack->hci_transport->can_send_packet_now){ 456 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 457 return 0; 458 } 459 } 460 return 1; 461 } 462 463 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 464 int hci_can_send_command_packet_now(void){ 465 if (hci_can_send_comand_packet_transport() == 0) return 0; 466 return hci_stack->num_cmd_packets > 0; 467 } 468 469 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 470 // check for async hci transport implementations 471 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 472 return hci_stack->hci_transport->can_send_packet_now(packet_type); 473 } 474 475 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 476 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 477 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 478 } 479 480 int hci_can_send_acl_le_packet_now(void){ 481 if (hci_stack->hci_packet_buffer_reserved) return 0; 482 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 483 } 484 485 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 486 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 487 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 488 } 489 490 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 491 if (hci_stack->hci_packet_buffer_reserved) return 0; 492 return hci_can_send_prepared_acl_packet_now(con_handle); 493 } 494 495 #ifdef ENABLE_CLASSIC 496 int hci_can_send_acl_classic_packet_now(void){ 497 if (hci_stack->hci_packet_buffer_reserved) return 0; 498 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 499 } 500 501 int hci_can_send_prepared_sco_packet_now(void){ 502 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 503 if (!hci_stack->synchronous_flow_control_enabled) return 1; 504 return hci_number_free_sco_slots() > 0; 505 } 506 507 int hci_can_send_sco_packet_now(void){ 508 if (hci_stack->hci_packet_buffer_reserved) return 0; 509 return hci_can_send_prepared_sco_packet_now(); 510 } 511 512 void hci_request_sco_can_send_now_event(void){ 513 hci_stack->sco_waiting_for_can_send_now = 1; 514 hci_notify_if_sco_can_send_now(); 515 } 516 #endif 517 518 // used for internal checks in l2cap.c 519 int hci_is_packet_buffer_reserved(void){ 520 return hci_stack->hci_packet_buffer_reserved; 521 } 522 523 // reserves outgoing packet buffer. @returns 1 if successful 524 int hci_reserve_packet_buffer(void){ 525 if (hci_stack->hci_packet_buffer_reserved) { 526 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 527 return 0; 528 } 529 hci_stack->hci_packet_buffer_reserved = 1; 530 return 1; 531 } 532 533 void hci_release_packet_buffer(void){ 534 hci_stack->hci_packet_buffer_reserved = 0; 535 } 536 537 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 538 static int hci_transport_synchronous(void){ 539 return hci_stack->hci_transport->can_send_packet_now == NULL; 540 } 541 542 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 543 544 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 545 546 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 547 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 548 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 549 max_acl_data_packet_length = hci_stack->le_data_packets_length; 550 } 551 552 // testing: reduce buffer to minimum 553 // max_acl_data_packet_length = 52; 554 555 log_debug("hci_send_acl_packet_fragments entered"); 556 557 int err; 558 // multiple packets could be send on a synchronous HCI transport 559 while (1){ 560 561 log_debug("hci_send_acl_packet_fragments loop entered"); 562 563 // get current data 564 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 565 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 566 int more_fragments = 0; 567 568 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 569 if (current_acl_data_packet_length > max_acl_data_packet_length){ 570 more_fragments = 1; 571 current_acl_data_packet_length = max_acl_data_packet_length; 572 } 573 574 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 575 if (acl_header_pos > 0){ 576 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 577 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 578 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 579 } 580 581 // update header len 582 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 583 584 // count packet 585 connection->num_acl_packets_sent++; 586 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 587 588 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 589 if (more_fragments){ 590 // update start of next fragment to send 591 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 592 } else { 593 // done 594 hci_stack->acl_fragmentation_pos = 0; 595 hci_stack->acl_fragmentation_total_size = 0; 596 } 597 598 // send packet 599 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 600 const int size = current_acl_data_packet_length + 4; 601 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 602 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 603 604 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 605 606 // done yet? 607 if (!more_fragments) break; 608 609 // can send more? 610 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 611 } 612 613 log_debug("hci_send_acl_packet_fragments loop over"); 614 615 // release buffer now for synchronous transport 616 if (hci_transport_synchronous()){ 617 hci_release_packet_buffer(); 618 // notify upper stack that it might be possible to send again 619 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 620 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 621 } 622 623 return err; 624 } 625 626 // pre: caller has reserved the packet buffer 627 int hci_send_acl_packet_buffer(int size){ 628 629 // log_info("hci_send_acl_packet_buffer size %u", size); 630 631 if (!hci_stack->hci_packet_buffer_reserved) { 632 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 633 return 0; 634 } 635 636 uint8_t * packet = hci_stack->hci_packet_buffer; 637 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 638 639 // check for free places on Bluetooth module 640 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 641 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 642 hci_release_packet_buffer(); 643 return BTSTACK_ACL_BUFFERS_FULL; 644 } 645 646 hci_connection_t *connection = hci_connection_for_handle( con_handle); 647 if (!connection) { 648 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 649 hci_release_packet_buffer(); 650 return 0; 651 } 652 653 #ifdef ENABLE_CLASSIC 654 hci_connection_timestamp(connection); 655 #endif 656 657 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 658 659 // setup data 660 hci_stack->acl_fragmentation_total_size = size; 661 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 662 663 return hci_send_acl_packet_fragments(connection); 664 } 665 666 #ifdef ENABLE_CLASSIC 667 // pre: caller has reserved the packet buffer 668 int hci_send_sco_packet_buffer(int size){ 669 670 // log_info("hci_send_acl_packet_buffer size %u", size); 671 672 if (!hci_stack->hci_packet_buffer_reserved) { 673 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 674 return 0; 675 } 676 677 uint8_t * packet = hci_stack->hci_packet_buffer; 678 679 // skip checks in loopback mode 680 if (!hci_stack->loopback_mode){ 681 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 682 683 // check for free places on Bluetooth module 684 if (!hci_can_send_prepared_sco_packet_now()) { 685 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 686 hci_release_packet_buffer(); 687 return BTSTACK_ACL_BUFFERS_FULL; 688 } 689 690 // track send packet in connection struct 691 hci_connection_t *connection = hci_connection_for_handle( con_handle); 692 if (!connection) { 693 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 694 hci_release_packet_buffer(); 695 return 0; 696 } 697 connection->num_sco_packets_sent++; 698 } 699 700 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 701 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 702 703 if (hci_transport_synchronous()){ 704 hci_release_packet_buffer(); 705 // notify upper stack that it might be possible to send again 706 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 707 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 708 } 709 710 return err; 711 } 712 #endif 713 714 static void acl_handler(uint8_t *packet, int size){ 715 716 // log_info("acl_handler: size %u", size); 717 718 // get info 719 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 720 hci_connection_t *conn = hci_connection_for_handle(con_handle); 721 uint8_t acl_flags = READ_ACL_FLAGS(packet); 722 uint16_t acl_length = READ_ACL_LENGTH(packet); 723 724 // ignore non-registered handle 725 if (!conn){ 726 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 727 return; 728 } 729 730 // assert packet is complete 731 if (acl_length + 4 != size){ 732 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 733 return; 734 } 735 736 #ifdef ENABLE_CLASSIC 737 // update idle timestamp 738 hci_connection_timestamp(conn); 739 #endif 740 741 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 742 hci_stack->host_completed_packets = 1; 743 conn->num_packets_completed++; 744 #endif 745 746 // handle different packet types 747 switch (acl_flags & 0x03) { 748 749 case 0x01: // continuation fragment 750 751 // sanity checks 752 if (conn->acl_recombination_pos == 0) { 753 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 754 return; 755 } 756 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 757 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 758 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 759 conn->acl_recombination_pos = 0; 760 return; 761 } 762 763 // append fragment payload (header already stored) 764 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 765 conn->acl_recombination_pos += acl_length; 766 767 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 768 // conn->acl_recombination_pos, conn->acl_recombination_length); 769 770 // forward complete L2CAP packet if complete. 771 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 772 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 773 // reset recombination buffer 774 conn->acl_recombination_length = 0; 775 conn->acl_recombination_pos = 0; 776 } 777 break; 778 779 case 0x02: { // first fragment 780 781 // sanity check 782 if (conn->acl_recombination_pos) { 783 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 784 conn->acl_recombination_pos = 0; 785 } 786 787 // peek into L2CAP packet! 788 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 789 790 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 791 792 // compare fragment size to L2CAP packet size 793 if (acl_length >= l2cap_length + 4){ 794 // forward fragment as L2CAP packet 795 hci_emit_acl_packet(packet, acl_length + 4); 796 } else { 797 798 if (acl_length > HCI_ACL_BUFFER_SIZE){ 799 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 800 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 801 return; 802 } 803 804 // store first fragment and tweak acl length for complete package 805 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 806 conn->acl_recombination_pos = acl_length + 4; 807 conn->acl_recombination_length = l2cap_length; 808 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 809 } 810 break; 811 812 } 813 default: 814 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 815 return; 816 } 817 818 // execute main loop 819 hci_run(); 820 } 821 822 static void hci_shutdown_connection(hci_connection_t *conn){ 823 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 824 825 #ifdef ENABLE_CLASSIC 826 #ifdef ENABLE_SCO_OVER_HCI 827 int addr_type = conn->address_type; 828 #endif 829 #endif 830 831 btstack_run_loop_remove_timer(&conn->timeout); 832 833 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 834 btstack_memory_hci_connection_free( conn ); 835 836 // now it's gone 837 hci_emit_nr_connections_changed(); 838 839 #ifdef ENABLE_CLASSIC 840 #ifdef ENABLE_SCO_OVER_HCI 841 // update SCO 842 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 843 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 844 } 845 #endif 846 #endif 847 } 848 849 #ifdef ENABLE_CLASSIC 850 851 static const uint16_t packet_type_sizes[] = { 852 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 853 HCI_ACL_DH1_SIZE, 0, 0, 0, 854 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 855 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 856 }; 857 static const uint8_t packet_type_feature_requirement_bit[] = { 858 0, // 3 slot packets 859 1, // 5 slot packets 860 25, // EDR 2 mpbs 861 26, // EDR 3 mbps 862 39, // 3 slot EDR packts 863 40, // 5 slot EDR packet 864 }; 865 static const uint16_t packet_type_feature_packet_mask[] = { 866 0x0f00, // 3 slot packets 867 0xf000, // 5 slot packets 868 0x1102, // EDR 2 mpbs 869 0x2204, // EDR 3 mbps 870 0x0300, // 3 slot EDR packts 871 0x3000, // 5 slot EDR packet 872 }; 873 874 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 875 // enable packet types based on size 876 uint16_t packet_types = 0; 877 unsigned int i; 878 for (i=0;i<16;i++){ 879 if (packet_type_sizes[i] == 0) continue; 880 if (packet_type_sizes[i] <= buffer_size){ 881 packet_types |= 1 << i; 882 } 883 } 884 // disable packet types due to missing local supported features 885 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 886 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 887 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 888 if (feature_set) continue; 889 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 890 packet_types &= ~packet_type_feature_packet_mask[i]; 891 } 892 // flip bits for "may not be used" 893 packet_types ^= 0x3306; 894 return packet_types; 895 } 896 897 uint16_t hci_usable_acl_packet_types(void){ 898 return hci_stack->packet_types; 899 } 900 #endif 901 902 uint8_t* hci_get_outgoing_packet_buffer(void){ 903 // hci packet buffer is >= acl data packet length 904 return hci_stack->hci_packet_buffer; 905 } 906 907 uint16_t hci_max_acl_data_packet_length(void){ 908 return hci_stack->acl_data_packet_length; 909 } 910 911 #ifdef ENABLE_CLASSIC 912 int hci_extended_sco_link_supported(void){ 913 // No. 31, byte 3, bit 7 914 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 915 } 916 #endif 917 918 int hci_non_flushable_packet_boundary_flag_supported(void){ 919 // No. 54, byte 6, bit 6 920 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 921 } 922 923 static int gap_ssp_supported(void){ 924 // No. 51, byte 6, bit 3 925 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 926 } 927 928 static int hci_classic_supported(void){ 929 #ifdef ENABLE_CLASSIC 930 // No. 37, byte 4, bit 5, = No BR/EDR Support 931 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 932 #else 933 return 0; 934 #endif 935 } 936 937 static int hci_le_supported(void){ 938 #ifdef ENABLE_BLE 939 // No. 37, byte 4, bit 6 = LE Supported (Controller) 940 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 941 #else 942 return 0; 943 #endif 944 } 945 946 #ifdef ENABLE_BLE 947 948 /** 949 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 950 */ 951 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 952 *addr_type = hci_stack->le_own_addr_type; 953 if (hci_stack->le_own_addr_type){ 954 memcpy(addr, hci_stack->le_random_address, 6); 955 } else { 956 memcpy(addr, hci_stack->local_bd_addr, 6); 957 } 958 } 959 960 #ifdef ENABLE_LE_CENTRAL 961 void le_handle_advertisement_report(uint8_t *packet, int size){ 962 963 UNUSED(size); 964 965 int offset = 3; 966 int num_reports = packet[offset]; 967 offset += 1; 968 969 int i; 970 // log_info("HCI: handle adv report with num reports: %d", num_reports); 971 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 972 for (i=0; i<num_reports;i++){ 973 uint8_t data_length = packet[offset + 8]; 974 uint8_t event_size = 10 + data_length; 975 int pos = 0; 976 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 977 event[pos++] = event_size; 978 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 979 offset += 8; 980 pos += 8; 981 event[pos++] = packet[offset + 1 + data_length]; // rssi 982 event[pos++] = packet[offset++]; //data_length; 983 memcpy(&event[pos], &packet[offset], data_length); 984 pos += data_length; 985 offset += data_length + 1; // rssi 986 hci_emit_event(event, pos, 1); 987 } 988 } 989 #endif 990 #endif 991 992 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 993 994 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 995 if (!hci_stack->config) return 0; 996 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 997 // Limit baud rate for Broadcom chipsets to 3 mbps 998 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 999 baud_rate = 3000000; 1000 } 1001 return baud_rate; 1002 } 1003 1004 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1005 UNUSED(ds); 1006 1007 switch (hci_stack->substate){ 1008 case HCI_INIT_W4_SEND_RESET: 1009 log_info("Resend HCI Reset"); 1010 hci_stack->substate = HCI_INIT_SEND_RESET; 1011 hci_stack->num_cmd_packets = 1; 1012 hci_run(); 1013 break; 1014 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1015 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1016 if (hci_stack->hci_transport->reset_link){ 1017 hci_stack->hci_transport->reset_link(); 1018 } 1019 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1020 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1021 log_info("Resend HCI Reset - CSR Warm Boot"); 1022 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1023 hci_stack->num_cmd_packets = 1; 1024 hci_run(); 1025 break; 1026 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1027 if (hci_stack->hci_transport->set_baudrate){ 1028 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1029 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1030 hci_stack->hci_transport->set_baudrate(baud_rate); 1031 } 1032 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1033 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1034 if (hci_stack->hci_transport->reset_link){ 1035 log_info("Link Reset"); 1036 hci_stack->hci_transport->reset_link(); 1037 } 1038 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1039 hci_run(); 1040 } 1041 break; 1042 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1043 // otherwise continue 1044 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1045 hci_send_cmd(&hci_read_local_supported_commands); 1046 break; 1047 default: 1048 break; 1049 } 1050 } 1051 #endif 1052 1053 static void hci_initializing_next_state(void){ 1054 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1055 } 1056 1057 // assumption: hci_can_send_command_packet_now() == true 1058 static void hci_initializing_run(void){ 1059 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1060 switch (hci_stack->substate){ 1061 case HCI_INIT_SEND_RESET: 1062 hci_state_reset(); 1063 1064 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1065 // prepare reset if command complete not received in 100ms 1066 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1067 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1068 btstack_run_loop_add_timer(&hci_stack->timeout); 1069 #endif 1070 // send command 1071 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1072 hci_send_cmd(&hci_reset); 1073 break; 1074 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1075 hci_send_cmd(&hci_read_local_version_information); 1076 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1077 break; 1078 case HCI_INIT_SEND_READ_LOCAL_NAME: 1079 hci_send_cmd(&hci_read_local_name); 1080 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1081 break; 1082 1083 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1084 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1085 hci_state_reset(); 1086 // prepare reset if command complete not received in 100ms 1087 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1088 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1089 btstack_run_loop_add_timer(&hci_stack->timeout); 1090 // send command 1091 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1092 hci_send_cmd(&hci_reset); 1093 break; 1094 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1095 hci_state_reset(); 1096 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1097 hci_send_cmd(&hci_reset); 1098 break; 1099 case HCI_INIT_SEND_BAUD_CHANGE: { 1100 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1101 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1102 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1103 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1104 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1105 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1106 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1107 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1108 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1109 btstack_run_loop_add_timer(&hci_stack->timeout); 1110 } 1111 break; 1112 } 1113 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1114 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1115 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1116 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1117 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1118 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1119 break; 1120 } 1121 case HCI_INIT_CUSTOM_INIT: 1122 // Custom initialization 1123 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1124 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1125 if (valid_cmd){ 1126 int size = 3 + hci_stack->hci_packet_buffer[2]; 1127 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1128 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1129 switch (valid_cmd) { 1130 case 1: 1131 default: 1132 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1133 break; 1134 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1135 log_info("CSR Warm Boot"); 1136 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1137 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1138 btstack_run_loop_add_timer(&hci_stack->timeout); 1139 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1140 && hci_stack->config 1141 && hci_stack->chipset 1142 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1143 && hci_stack->hci_transport->set_baudrate 1144 && hci_transport_uart_get_main_baud_rate()){ 1145 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1146 } else { 1147 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1148 } 1149 break; 1150 } 1151 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1152 break; 1153 } 1154 log_info("Init script done"); 1155 1156 // Init script download on Broadcom chipsets causes: 1157 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1158 // - baud rate to reset, restore UART baud rate if needed 1159 int need_baud_change = hci_stack->config 1160 && hci_stack->chipset 1161 && hci_stack->chipset->set_baudrate_command 1162 && hci_stack->hci_transport->set_baudrate 1163 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1164 if (need_baud_change) { 1165 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1166 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1167 hci_stack->hci_transport->set_baudrate(baud_rate); 1168 } 1169 1170 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1171 // -> Work around: wait a few milliseconds here. 1172 log_info("BCM delay after init script"); 1173 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1174 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1175 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1176 btstack_run_loop_add_timer(&hci_stack->timeout); 1177 break; 1178 } 1179 } 1180 // otherwise continue 1181 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1182 hci_send_cmd(&hci_read_local_supported_commands); 1183 break; 1184 case HCI_INIT_SET_BD_ADDR: 1185 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1186 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1187 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1188 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1189 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1190 break; 1191 #endif 1192 1193 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1194 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1195 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1196 hci_send_cmd(&hci_read_local_supported_commands); 1197 break; 1198 case HCI_INIT_READ_BD_ADDR: 1199 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1200 hci_send_cmd(&hci_read_bd_addr); 1201 break; 1202 case HCI_INIT_READ_BUFFER_SIZE: 1203 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1204 hci_send_cmd(&hci_read_buffer_size); 1205 break; 1206 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1207 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1208 hci_send_cmd(&hci_read_local_supported_features); 1209 break; 1210 1211 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1212 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1213 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1214 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1215 break; 1216 case HCI_INIT_HOST_BUFFER_SIZE: 1217 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1218 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1219 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1220 break; 1221 #endif 1222 1223 case HCI_INIT_SET_EVENT_MASK: 1224 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1225 if (hci_le_supported()){ 1226 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1227 } else { 1228 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1229 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1230 } 1231 break; 1232 1233 #ifdef ENABLE_CLASSIC 1234 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1235 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1236 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1237 break; 1238 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1239 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1240 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1241 break; 1242 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1243 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1244 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1245 break; 1246 case HCI_INIT_WRITE_LOCAL_NAME: 1247 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1248 if (hci_stack->local_name){ 1249 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1250 } else { 1251 char local_name[8+17+1]; 1252 // BTstack 11:22:33:44:55:66 1253 memcpy(local_name, "BTstack ", 8); 1254 memcpy(&local_name[8], bd_addr_to_str(hci_stack->local_bd_addr), 17); // strlen(bd_addr_to_str(...)) = 17 1255 local_name[8+17] = '\0'; 1256 log_info("---> Name %s", local_name); 1257 hci_send_cmd(&hci_write_local_name, local_name); 1258 } 1259 break; 1260 case HCI_INIT_WRITE_EIR_DATA: 1261 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1262 hci_send_cmd(&hci_write_extended_inquiry_response, 0, hci_stack->eir_data); 1263 break; 1264 case HCI_INIT_WRITE_INQUIRY_MODE: 1265 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1266 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1267 break; 1268 case HCI_INIT_WRITE_SCAN_ENABLE: 1269 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1270 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1271 break; 1272 // only sent if ENABLE_SCO_OVER_HCI is defined 1273 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1274 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1275 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1276 break; 1277 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1278 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1279 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1280 break; 1281 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1282 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1283 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1284 log_info("BCM: Route SCO data via HCI transport"); 1285 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1286 break; 1287 1288 #endif 1289 #ifdef ENABLE_BLE 1290 // LE INIT 1291 case HCI_INIT_LE_READ_BUFFER_SIZE: 1292 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1293 hci_send_cmd(&hci_le_read_buffer_size); 1294 break; 1295 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1296 // LE Supported Host = 1, Simultaneous Host = 0 1297 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1298 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1299 break; 1300 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1301 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1302 hci_send_cmd(&hci_le_read_maximum_data_length); 1303 break; 1304 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1305 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1306 // TODO: use values from read max data length 1307 hci_send_cmd(&hci_le_write_suggested_default_data_length, 251, 2120); 1308 break; 1309 #ifdef ENABLE_LE_CENTRAL 1310 case HCI_INIT_READ_WHITE_LIST_SIZE: 1311 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1312 hci_send_cmd(&hci_le_read_white_list_size); 1313 break; 1314 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1315 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1316 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1317 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1318 break; 1319 #endif 1320 #endif 1321 default: 1322 return; 1323 } 1324 } 1325 1326 static void hci_init_done(void){ 1327 // done. tell the app 1328 log_info("hci_init_done -> HCI_STATE_WORKING"); 1329 hci_stack->state = HCI_STATE_WORKING; 1330 hci_emit_state(); 1331 hci_run(); 1332 } 1333 1334 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1335 UNUSED(size); 1336 1337 uint8_t command_completed = 0; 1338 1339 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1340 uint16_t opcode = little_endian_read_16(packet,3); 1341 if (opcode == hci_stack->last_cmd_opcode){ 1342 command_completed = 1; 1343 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1344 } else { 1345 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1346 } 1347 } 1348 1349 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1350 uint8_t status = packet[2]; 1351 uint16_t opcode = little_endian_read_16(packet,4); 1352 if (opcode == hci_stack->last_cmd_opcode){ 1353 if (status){ 1354 command_completed = 1; 1355 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1356 } else { 1357 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1358 } 1359 } else { 1360 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1361 } 1362 } 1363 1364 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1365 1366 // Vendor == CSR 1367 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1368 // TODO: track actual command 1369 command_completed = 1; 1370 } 1371 1372 // Vendor == Toshiba 1373 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1374 // TODO: track actual command 1375 command_completed = 1; 1376 } 1377 1378 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1379 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1380 // 1381 // HCI Reset 1382 // Timeout 100 ms 1383 // HCI Reset 1384 // Command Complete Reset 1385 // HCI Read Local Version Information 1386 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1387 // hang... 1388 // 1389 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1390 if (!command_completed 1391 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1392 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1393 1394 uint16_t opcode = little_endian_read_16(packet,3); 1395 if (opcode == hci_reset.opcode){ 1396 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1397 return; 1398 } 1399 } 1400 1401 // CSR & H5 1402 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1403 if (!command_completed 1404 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1405 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1406 1407 uint16_t opcode = little_endian_read_16(packet,3); 1408 if (opcode == hci_reset.opcode){ 1409 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1410 return; 1411 } 1412 } 1413 1414 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1415 // fix: Correct substate and behave as command below 1416 if (command_completed){ 1417 switch (hci_stack->substate){ 1418 case HCI_INIT_SEND_RESET: 1419 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1420 break; 1421 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1422 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1423 break; 1424 default: 1425 break; 1426 } 1427 } 1428 1429 #endif 1430 1431 if (!command_completed) return; 1432 1433 int need_baud_change = 0; 1434 int need_addr_change = 0; 1435 1436 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1437 need_baud_change = hci_stack->config 1438 && hci_stack->chipset 1439 && hci_stack->chipset->set_baudrate_command 1440 && hci_stack->hci_transport->set_baudrate 1441 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1442 1443 need_addr_change = hci_stack->custom_bd_addr_set 1444 && hci_stack->chipset 1445 && hci_stack->chipset->set_bd_addr_command; 1446 #endif 1447 1448 switch(hci_stack->substate){ 1449 1450 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1451 case HCI_INIT_SEND_RESET: 1452 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1453 // fix: just correct substate and behave as command below 1454 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1455 btstack_run_loop_remove_timer(&hci_stack->timeout); 1456 break; 1457 case HCI_INIT_W4_SEND_RESET: 1458 btstack_run_loop_remove_timer(&hci_stack->timeout); 1459 break; 1460 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1461 log_info("Received local name, need baud change %d", need_baud_change); 1462 if (need_baud_change){ 1463 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1464 return; 1465 } 1466 // skip baud change 1467 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1468 return; 1469 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1470 // for STLC2500D, baud rate change already happened. 1471 // for others, baud rate gets changed now 1472 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1473 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1474 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1475 hci_stack->hci_transport->set_baudrate(baud_rate); 1476 } 1477 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1478 return; 1479 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1480 btstack_run_loop_remove_timer(&hci_stack->timeout); 1481 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1482 return; 1483 case HCI_INIT_W4_CUSTOM_INIT: 1484 // repeat custom init 1485 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1486 return; 1487 #else 1488 case HCI_INIT_W4_SEND_RESET: 1489 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1490 return ; 1491 #endif 1492 1493 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1494 if (need_baud_change && hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1495 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1496 return; 1497 } 1498 if (need_addr_change){ 1499 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1500 return; 1501 } 1502 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1503 return; 1504 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1505 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1506 if (need_baud_change){ 1507 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1508 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1509 hci_stack->hci_transport->set_baudrate(baud_rate); 1510 } 1511 if (need_addr_change){ 1512 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1513 return; 1514 } 1515 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1516 return; 1517 case HCI_INIT_W4_SET_BD_ADDR: 1518 // for STLC2500D, bd addr change only gets active after sending reset command 1519 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1520 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1521 return; 1522 } 1523 // skipping st warm boot 1524 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1525 return; 1526 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1527 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1528 return; 1529 #endif 1530 case HCI_INIT_W4_READ_BD_ADDR: 1531 // only read buffer size if supported 1532 if (hci_stack->local_supported_commands[0] & 0x01) { 1533 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1534 return; 1535 } 1536 // skipping read buffer size 1537 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1538 return; 1539 case HCI_INIT_W4_SET_EVENT_MASK: 1540 // skip Classic init commands for LE only chipsets 1541 if (!hci_classic_supported()){ 1542 #ifdef ENABLE_BLE 1543 if (hci_le_supported()){ 1544 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1545 return; 1546 } 1547 #endif 1548 log_error("Neither BR/EDR nor LE supported"); 1549 hci_init_done(); 1550 return; 1551 } 1552 if (!gap_ssp_supported()){ 1553 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1554 return; 1555 } 1556 break; 1557 #ifdef ENABLE_BLE 1558 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1559 // skip write le host if not supported (e.g. on LE only EM9301) 1560 if (hci_stack->local_supported_commands[0] & 0x02) break; 1561 #ifdef ENABLE_LE_CENTRAL 1562 hci_stack->substate = HCI_INIT_LE_READ_MAX_DATA_LENGTH; 1563 #else 1564 hci_init_done(); 1565 #endif 1566 return; 1567 #endif 1568 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1569 // skip write eir data if no eir data set 1570 if (hci_stack->eir_data) break; 1571 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1572 return; 1573 1574 #ifdef ENABLE_SCO_OVER_HCI 1575 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1576 // skip write synchronous flow control if not supported 1577 if (hci_stack->local_supported_commands[0] & 0x04) break; 1578 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1579 // explicit fall through to reduce repetitions 1580 1581 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1582 // skip write default erroneous data reporting if not supported 1583 if (hci_stack->local_supported_commands[0] & 0x08) break; 1584 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1585 // explicit fall through to reduce repetitions 1586 1587 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1588 // skip bcm set sco pcm config on non-Broadcom chipsets 1589 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1590 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1591 // explicit fall through to reduce repetitions 1592 1593 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1594 if (!hci_le_supported()){ 1595 // SKIP LE init for Classic only configuration 1596 hci_init_done(); 1597 return; 1598 } 1599 break; 1600 1601 #else /* !ENABLE_SCO_OVER_HCI */ 1602 1603 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1604 #ifdef ENABLE_BLE 1605 if (hci_le_supported()){ 1606 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1607 return; 1608 } 1609 #endif 1610 // SKIP LE init for Classic only configuration 1611 hci_init_done(); 1612 return; 1613 #endif /* ENABLE_SCO_OVER_HCI */ 1614 1615 // Response to command before init done state -> init done 1616 case (HCI_INIT_DONE-1): 1617 hci_init_done(); 1618 return; 1619 1620 default: 1621 break; 1622 } 1623 hci_initializing_next_state(); 1624 } 1625 1626 static void event_handler(uint8_t *packet, int size){ 1627 1628 uint16_t event_length = packet[1]; 1629 1630 // assert packet is complete 1631 if (size != event_length + 2){ 1632 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1633 return; 1634 } 1635 1636 bd_addr_t addr; 1637 bd_addr_type_t addr_type; 1638 hci_con_handle_t handle; 1639 hci_connection_t * conn; 1640 int i; 1641 #ifdef ENABLE_CLASSIC 1642 uint8_t link_type; 1643 #endif 1644 1645 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1646 1647 switch (hci_event_packet_get_type(packet)) { 1648 1649 case HCI_EVENT_COMMAND_COMPLETE: 1650 // get num cmd packets - limit to 1 to reduce complexity 1651 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1652 1653 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1654 if (packet[5]) break; 1655 // terminate, name 248 chars 1656 packet[6+248] = 0; 1657 log_info("local name: %s", &packet[6]); 1658 } 1659 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1660 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1661 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1662 uint16_t acl_len = little_endian_read_16(packet, 6); 1663 uint16_t sco_len = packet[8]; 1664 1665 // determine usable ACL/SCO payload size 1666 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1667 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1668 1669 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1670 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1671 1672 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1673 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1674 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1675 } 1676 } 1677 #ifdef ENABLE_BLE 1678 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1679 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1680 hci_stack->le_acl_packets_total_num = packet[8]; 1681 // determine usable ACL payload size 1682 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1683 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1684 } 1685 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1686 } 1687 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1688 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1689 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1690 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); 1691 } 1692 #ifdef ENABLE_LE_CENTRAL 1693 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1694 hci_stack->le_whitelist_capacity = packet[6]; 1695 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1696 } 1697 #endif 1698 #endif 1699 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1700 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1701 hci_stack->local_bd_addr); 1702 log_info("Local Address, Status: 0x%02x: Addr: %s", 1703 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1704 #ifdef ENABLE_CLASSIC 1705 if (hci_stack->link_key_db){ 1706 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1707 } 1708 #endif 1709 } 1710 #ifdef ENABLE_CLASSIC 1711 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1712 hci_emit_discoverable_enabled(hci_stack->discoverable); 1713 } 1714 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1715 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1716 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1717 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1718 hci_emit_event(event, sizeof(event), 1); 1719 } 1720 } 1721 #endif 1722 1723 // Note: HCI init checks 1724 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1725 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1726 1727 #ifdef ENABLE_CLASSIC 1728 // determine usable ACL packet types based on host buffer size and supported features 1729 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1730 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1731 #endif 1732 // Classic/LE 1733 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1734 } 1735 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1736 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1737 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1738 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1739 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1740 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1741 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1742 } 1743 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1744 hci_stack->local_supported_commands[0] = 1745 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1746 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1747 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1748 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 1749 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 1750 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2; // bit 5 = Octet 35, bit 3 1751 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1752 } 1753 #ifdef ENABLE_CLASSIC 1754 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1755 if (packet[5] == 0){ 1756 hci_stack->synchronous_flow_control_enabled = 1; 1757 } 1758 } 1759 #endif 1760 break; 1761 1762 case HCI_EVENT_COMMAND_STATUS: 1763 // get num cmd packets - limit to 1 to reduce complexity 1764 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1765 break; 1766 1767 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1768 int offset = 3; 1769 for (i=0; i<packet[2];i++){ 1770 handle = little_endian_read_16(packet, offset); 1771 offset += 2; 1772 uint16_t num_packets = little_endian_read_16(packet, offset); 1773 offset += 2; 1774 1775 conn = hci_connection_for_handle(handle); 1776 if (!conn){ 1777 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1778 continue; 1779 } 1780 1781 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1782 #ifdef ENABLE_CLASSIC 1783 if (conn->num_sco_packets_sent >= num_packets){ 1784 conn->num_sco_packets_sent -= num_packets; 1785 } else { 1786 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1787 conn->num_sco_packets_sent = 0; 1788 } 1789 hci_notify_if_sco_can_send_now(); 1790 #endif 1791 } else { 1792 if (conn->num_acl_packets_sent >= num_packets){ 1793 conn->num_acl_packets_sent -= num_packets; 1794 } else { 1795 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1796 conn->num_acl_packets_sent = 0; 1797 } 1798 } 1799 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1800 } 1801 break; 1802 } 1803 1804 #ifdef ENABLE_CLASSIC 1805 case HCI_EVENT_INQUIRY_COMPLETE: 1806 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 1807 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1808 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1809 hci_emit_event(event, sizeof(event), 1); 1810 } 1811 break; 1812 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1813 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 1814 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 1815 } 1816 break; 1817 case HCI_EVENT_CONNECTION_REQUEST: 1818 reverse_bd_addr(&packet[2], addr); 1819 // TODO: eval COD 8-10 1820 link_type = packet[11]; 1821 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1822 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1823 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1824 if (!conn) { 1825 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1826 } 1827 if (!conn) { 1828 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1829 hci_stack->decline_reason = 0x0d; 1830 bd_addr_copy(hci_stack->decline_addr, addr); 1831 break; 1832 } 1833 conn->role = HCI_ROLE_SLAVE; 1834 conn->state = RECEIVED_CONNECTION_REQUEST; 1835 // store info about eSCO 1836 if (link_type == 0x02){ 1837 conn->remote_supported_feature_eSCO = 1; 1838 } 1839 hci_run(); 1840 break; 1841 1842 case HCI_EVENT_CONNECTION_COMPLETE: 1843 // Connection management 1844 reverse_bd_addr(&packet[5], addr); 1845 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1846 addr_type = BD_ADDR_TYPE_CLASSIC; 1847 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1848 if (conn) { 1849 if (!packet[2]){ 1850 conn->state = OPEN; 1851 conn->con_handle = little_endian_read_16(packet, 3); 1852 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1853 1854 // restart timer 1855 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1856 btstack_run_loop_add_timer(&conn->timeout); 1857 1858 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1859 1860 hci_emit_nr_connections_changed(); 1861 } else { 1862 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1863 uint8_t status = packet[2]; 1864 bd_addr_t bd_address; 1865 memcpy(&bd_address, conn->address, 6); 1866 1867 // connection failed, remove entry 1868 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1869 btstack_memory_hci_connection_free( conn ); 1870 1871 // notify client if dedicated bonding 1872 if (notify_dedicated_bonding_failed){ 1873 log_info("hci notify_dedicated_bonding_failed"); 1874 hci_emit_dedicated_bonding_result(bd_address, status); 1875 } 1876 1877 // if authentication error, also delete link key 1878 if (packet[2] == 0x05) { 1879 gap_drop_link_key_for_bd_addr(addr); 1880 } 1881 } 1882 } 1883 break; 1884 1885 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1886 reverse_bd_addr(&packet[5], addr); 1887 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1888 if (packet[2]){ 1889 // connection failed 1890 break; 1891 } 1892 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1893 if (!conn) { 1894 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1895 } 1896 if (!conn) { 1897 break; 1898 } 1899 conn->state = OPEN; 1900 conn->con_handle = little_endian_read_16(packet, 3); 1901 1902 #ifdef ENABLE_SCO_OVER_HCI 1903 // update SCO 1904 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 1905 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1906 } 1907 #endif 1908 break; 1909 1910 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1911 handle = little_endian_read_16(packet, 3); 1912 conn = hci_connection_for_handle(handle); 1913 if (!conn) break; 1914 if (!packet[2]){ 1915 uint8_t * features = &packet[5]; 1916 if (features[6] & (1 << 3)){ 1917 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1918 } 1919 if (features[3] & (1<<7)){ 1920 conn->remote_supported_feature_eSCO = 1; 1921 } 1922 } 1923 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1924 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1925 if (conn->bonding_flags & BONDING_DEDICATED){ 1926 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1927 } 1928 break; 1929 1930 case HCI_EVENT_LINK_KEY_REQUEST: 1931 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1932 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1933 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1934 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1935 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1936 hci_run(); 1937 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1938 return; 1939 1940 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1941 reverse_bd_addr(&packet[2], addr); 1942 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1943 if (!conn) break; 1944 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1945 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1946 // Change Connection Encryption keeps link key type 1947 if (link_key_type != CHANGED_COMBINATION_KEY){ 1948 conn->link_key_type = link_key_type; 1949 } 1950 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1951 // still forward event to allow dismiss of pairing dialog 1952 break; 1953 } 1954 1955 case HCI_EVENT_PIN_CODE_REQUEST: 1956 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1957 // non-bondable mode: pin code negative reply will be sent 1958 if (!hci_stack->bondable){ 1959 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1960 hci_run(); 1961 return; 1962 } 1963 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1964 if (!hci_stack->link_key_db) break; 1965 hci_event_pin_code_request_get_bd_addr(packet, addr); 1966 hci_stack->link_key_db->delete_link_key(addr); 1967 break; 1968 1969 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1970 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1971 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1972 break; 1973 1974 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1975 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1976 if (!hci_stack->ssp_auto_accept) break; 1977 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1978 break; 1979 1980 case HCI_EVENT_USER_PASSKEY_REQUEST: 1981 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1982 if (!hci_stack->ssp_auto_accept) break; 1983 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1984 break; 1985 #endif 1986 1987 case HCI_EVENT_ENCRYPTION_CHANGE: 1988 handle = little_endian_read_16(packet, 3); 1989 conn = hci_connection_for_handle(handle); 1990 if (!conn) break; 1991 if (packet[2] == 0) { 1992 if (packet[5]){ 1993 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1994 } else { 1995 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1996 } 1997 } 1998 #ifdef ENABLE_CLASSIC 1999 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2000 #endif 2001 break; 2002 2003 #ifdef ENABLE_CLASSIC 2004 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2005 handle = little_endian_read_16(packet, 3); 2006 conn = hci_connection_for_handle(handle); 2007 if (!conn) break; 2008 2009 // dedicated bonding: send result and disconnect 2010 if (conn->bonding_flags & BONDING_DEDICATED){ 2011 conn->bonding_flags &= ~BONDING_DEDICATED; 2012 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2013 conn->bonding_status = packet[2]; 2014 break; 2015 } 2016 2017 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2018 // link key sufficient for requested security 2019 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2020 break; 2021 } 2022 // not enough 2023 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2024 break; 2025 #endif 2026 2027 // HCI_EVENT_DISCONNECTION_COMPLETE 2028 // has been split, to first notify stack before shutting connection down 2029 // see end of function, too. 2030 case HCI_EVENT_DISCONNECTION_COMPLETE: 2031 if (packet[2]) break; // status != 0 2032 handle = little_endian_read_16(packet, 3); 2033 // drop outgoing ACL fragments if it is for closed connection 2034 if (hci_stack->acl_fragmentation_total_size > 0) { 2035 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2036 log_info("hci: drop fragmented ACL data for closed connection"); 2037 hci_stack->acl_fragmentation_total_size = 0; 2038 hci_stack->acl_fragmentation_pos = 0; 2039 } 2040 } 2041 2042 // re-enable advertisements for le connections if active 2043 conn = hci_connection_for_handle(handle); 2044 if (!conn) break; 2045 #ifdef ENABLE_BLE 2046 #ifdef ENABLE_LE_PERIPHERAL 2047 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 2048 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2049 } 2050 #endif 2051 #endif 2052 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2053 break; 2054 2055 case HCI_EVENT_HARDWARE_ERROR: 2056 log_error("Hardware Error: 0x%02x", packet[2]); 2057 if (hci_stack->hardware_error_callback){ 2058 (*hci_stack->hardware_error_callback)(packet[2]); 2059 } else { 2060 // if no special requests, just reboot stack 2061 hci_power_control_off(); 2062 hci_power_control_on(); 2063 } 2064 break; 2065 2066 #ifdef ENABLE_CLASSIC 2067 case HCI_EVENT_ROLE_CHANGE: 2068 if (packet[2]) break; // status != 0 2069 handle = little_endian_read_16(packet, 3); 2070 conn = hci_connection_for_handle(handle); 2071 if (!conn) break; // no conn 2072 conn->role = packet[9]; 2073 break; 2074 #endif 2075 2076 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2077 // release packet buffer only for asynchronous transport and if there are not further fragements 2078 if (hci_transport_synchronous()) { 2079 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2080 return; // instead of break: to avoid re-entering hci_run() 2081 } 2082 if (hci_stack->acl_fragmentation_total_size) break; 2083 hci_release_packet_buffer(); 2084 2085 // L2CAP receives this event via the hci_emit_event below 2086 2087 #ifdef ENABLE_CLASSIC 2088 // For SCO, we do the can_send_now_check here 2089 hci_notify_if_sco_can_send_now(); 2090 #endif 2091 break; 2092 2093 #ifdef ENABLE_CLASSIC 2094 case HCI_EVENT_SCO_CAN_SEND_NOW: 2095 // For SCO, we do the can_send_now_check here 2096 hci_notify_if_sco_can_send_now(); 2097 return; 2098 2099 // explode inquriy results for easier consumption 2100 case HCI_EVENT_INQUIRY_RESULT: 2101 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2102 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2103 gap_inquiry_explode(packet); 2104 break; 2105 #endif 2106 2107 #ifdef ENABLE_BLE 2108 case HCI_EVENT_LE_META: 2109 switch (packet[2]){ 2110 #ifdef ENABLE_LE_CENTRAL 2111 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2112 // log_info("advertising report received"); 2113 if (hci_stack->le_scanning_state != LE_SCANNING) break; 2114 le_handle_advertisement_report(packet, size); 2115 break; 2116 #endif 2117 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2118 // Connection management 2119 reverse_bd_addr(&packet[8], addr); 2120 addr_type = (bd_addr_type_t)packet[7]; 2121 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2122 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2123 #ifdef ENABLE_LE_CENTRAL 2124 // if auto-connect, remove from whitelist in both roles 2125 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2126 hci_remove_from_whitelist(addr_type, addr); 2127 } 2128 // handle error: error is reported only to the initiator -> outgoing connection 2129 if (packet[3]){ 2130 // outgoing connection establishment is done 2131 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2132 // remove entry 2133 if (conn){ 2134 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2135 btstack_memory_hci_connection_free( conn ); 2136 } 2137 break; 2138 } 2139 #endif 2140 // on success, both hosts receive connection complete event 2141 if (packet[6] == HCI_ROLE_MASTER){ 2142 #ifdef ENABLE_LE_CENTRAL 2143 // if we're master, it was an outgoing connection and we're done with it 2144 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2145 #endif 2146 } else { 2147 #ifdef ENABLE_LE_PERIPHERAL 2148 // if we're slave, it was an incoming connection, advertisements have stopped 2149 hci_stack->le_advertisements_active = 0; 2150 // try to re-enable them 2151 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2152 #endif 2153 } 2154 // LE connections are auto-accepted, so just create a connection if there isn't one already 2155 if (!conn){ 2156 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2157 } 2158 // no memory, sorry. 2159 if (!conn){ 2160 break; 2161 } 2162 2163 conn->state = OPEN; 2164 conn->role = packet[6]; 2165 conn->con_handle = little_endian_read_16(packet, 4); 2166 2167 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2168 2169 // restart timer 2170 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2171 // btstack_run_loop_add_timer(&conn->timeout); 2172 2173 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2174 2175 hci_emit_nr_connections_changed(); 2176 break; 2177 2178 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2179 2180 default: 2181 break; 2182 } 2183 break; 2184 #endif 2185 default: 2186 break; 2187 } 2188 2189 // handle BT initialization 2190 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2191 hci_initializing_event_handler(packet, size); 2192 } 2193 2194 // help with BT sleep 2195 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2196 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2197 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2198 hci_initializing_next_state(); 2199 } 2200 2201 // notify upper stack 2202 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2203 2204 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2205 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2206 if (!packet[2]){ 2207 handle = little_endian_read_16(packet, 3); 2208 hci_connection_t * aConn = hci_connection_for_handle(handle); 2209 if (aConn) { 2210 uint8_t status = aConn->bonding_status; 2211 uint16_t flags = aConn->bonding_flags; 2212 bd_addr_t bd_address; 2213 memcpy(&bd_address, aConn->address, 6); 2214 hci_shutdown_connection(aConn); 2215 // connection struct is gone, don't access anymore 2216 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2217 hci_emit_dedicated_bonding_result(bd_address, status); 2218 } 2219 } 2220 } 2221 } 2222 2223 // execute main loop 2224 hci_run(); 2225 } 2226 2227 #ifdef ENABLE_CLASSIC 2228 static void sco_handler(uint8_t * packet, uint16_t size){ 2229 if (!hci_stack->sco_packet_handler) return; 2230 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2231 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2232 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2233 hci_connection_t *conn = hci_connection_for_handle(con_handle); 2234 if (conn){ 2235 conn->num_packets_completed++; 2236 hci_stack->host_completed_packets = 1; 2237 hci_run(); 2238 } 2239 #endif 2240 } 2241 #endif 2242 2243 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2244 hci_dump_packet(packet_type, 1, packet, size); 2245 switch (packet_type) { 2246 case HCI_EVENT_PACKET: 2247 event_handler(packet, size); 2248 break; 2249 case HCI_ACL_DATA_PACKET: 2250 acl_handler(packet, size); 2251 break; 2252 #ifdef ENABLE_CLASSIC 2253 case HCI_SCO_DATA_PACKET: 2254 sco_handler(packet, size); 2255 break; 2256 #endif 2257 default: 2258 break; 2259 } 2260 } 2261 2262 /** 2263 * @brief Add event packet handler. 2264 */ 2265 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2266 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2267 } 2268 2269 2270 /** Register HCI packet handlers */ 2271 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2272 hci_stack->acl_packet_handler = handler; 2273 } 2274 2275 #ifdef ENABLE_CLASSIC 2276 /** 2277 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2278 */ 2279 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2280 hci_stack->sco_packet_handler = handler; 2281 } 2282 #endif 2283 2284 static void hci_state_reset(void){ 2285 // no connections yet 2286 hci_stack->connections = NULL; 2287 2288 // keep discoverable/connectable as this has been requested by the client(s) 2289 // hci_stack->discoverable = 0; 2290 // hci_stack->connectable = 0; 2291 // hci_stack->bondable = 1; 2292 // hci_stack->own_addr_type = 0; 2293 2294 // buffer is free 2295 hci_stack->hci_packet_buffer_reserved = 0; 2296 2297 // no pending cmds 2298 hci_stack->decline_reason = 0; 2299 hci_stack->new_scan_enable_value = 0xff; 2300 2301 // LE 2302 #ifdef ENABLE_BLE 2303 memset(hci_stack->le_random_address, 0, 6); 2304 hci_stack->le_random_address_set = 0; 2305 #endif 2306 #ifdef ENABLE_LE_CENTRAL 2307 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2308 hci_stack->le_scan_type = 0xff; 2309 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2310 hci_stack->le_whitelist = 0; 2311 hci_stack->le_whitelist_capacity = 0; 2312 2313 // connection parameter to use for outgoing connections 2314 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2315 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2316 hci_stack->le_connection_latency = 4; // 4 2317 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2318 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2319 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2320 #endif 2321 2322 // connection parameter range used to answer connection parameter update requests in l2cap 2323 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2324 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2325 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2326 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2327 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2328 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2329 } 2330 2331 #ifdef ENABLE_CLASSIC 2332 /** 2333 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2334 */ 2335 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2336 // store and open remote device db 2337 hci_stack->link_key_db = link_key_db; 2338 if (hci_stack->link_key_db) { 2339 hci_stack->link_key_db->open(); 2340 } 2341 } 2342 #endif 2343 2344 void hci_init(const hci_transport_t *transport, const void *config){ 2345 2346 #ifdef HAVE_MALLOC 2347 if (!hci_stack) { 2348 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2349 } 2350 #else 2351 hci_stack = &hci_stack_static; 2352 #endif 2353 memset(hci_stack, 0, sizeof(hci_stack_t)); 2354 2355 // reference to use transport layer implementation 2356 hci_stack->hci_transport = transport; 2357 2358 // reference to used config 2359 hci_stack->config = config; 2360 2361 // setup pointer for outgoing packet buffer 2362 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2363 2364 // max acl payload size defined in config.h 2365 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2366 2367 // register packet handlers with transport 2368 transport->register_packet_handler(&packet_handler); 2369 2370 hci_stack->state = HCI_STATE_OFF; 2371 2372 // class of device 2373 hci_stack->class_of_device = 0x007a020c; // Smartphone 2374 2375 // bondable by default 2376 hci_stack->bondable = 1; 2377 2378 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2379 hci_stack->ssp_enable = 1; 2380 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2381 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2382 hci_stack->ssp_auto_accept = 1; 2383 2384 // voice setting - signed 16 bit pcm data with CVSD over the air 2385 hci_stack->sco_voice_setting = 0x60; 2386 2387 hci_state_reset(); 2388 } 2389 2390 /** 2391 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2392 */ 2393 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2394 hci_stack->chipset = chipset_driver; 2395 2396 // reset chipset driver - init is also called on power_up 2397 if (hci_stack->chipset && hci_stack->chipset->init){ 2398 hci_stack->chipset->init(hci_stack->config); 2399 } 2400 } 2401 2402 /** 2403 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2404 */ 2405 void hci_set_control(const btstack_control_t *hardware_control){ 2406 // references to used control implementation 2407 hci_stack->control = hardware_control; 2408 // init with transport config 2409 hardware_control->init(hci_stack->config); 2410 } 2411 2412 void hci_close(void){ 2413 // close remote device db 2414 if (hci_stack->link_key_db) { 2415 hci_stack->link_key_db->close(); 2416 } 2417 2418 btstack_linked_list_iterator_t lit; 2419 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2420 while (btstack_linked_list_iterator_has_next(&lit)){ 2421 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2422 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2423 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2424 hci_shutdown_connection(connection); 2425 } 2426 2427 hci_power_control(HCI_POWER_OFF); 2428 2429 #ifdef HAVE_MALLOC 2430 free(hci_stack); 2431 #endif 2432 hci_stack = NULL; 2433 } 2434 2435 #ifdef ENABLE_CLASSIC 2436 void gap_set_class_of_device(uint32_t class_of_device){ 2437 hci_stack->class_of_device = class_of_device; 2438 } 2439 2440 void hci_disable_l2cap_timeout_check(void){ 2441 disable_l2cap_timeouts = 1; 2442 } 2443 #endif 2444 2445 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2446 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2447 void hci_set_bd_addr(bd_addr_t addr){ 2448 memcpy(hci_stack->custom_bd_addr, addr, 6); 2449 hci_stack->custom_bd_addr_set = 1; 2450 } 2451 #endif 2452 2453 // State-Module-Driver overview 2454 // state module low-level 2455 // HCI_STATE_OFF off close 2456 // HCI_STATE_INITIALIZING, on open 2457 // HCI_STATE_WORKING, on open 2458 // HCI_STATE_HALTING, on open 2459 // HCI_STATE_SLEEPING, off/sleep close 2460 // HCI_STATE_FALLING_ASLEEP on open 2461 2462 static int hci_power_control_on(void){ 2463 2464 // power on 2465 int err = 0; 2466 if (hci_stack->control && hci_stack->control->on){ 2467 err = (*hci_stack->control->on)(); 2468 } 2469 if (err){ 2470 log_error( "POWER_ON failed"); 2471 hci_emit_hci_open_failed(); 2472 return err; 2473 } 2474 2475 // int chipset driver 2476 if (hci_stack->chipset && hci_stack->chipset->init){ 2477 hci_stack->chipset->init(hci_stack->config); 2478 } 2479 2480 // init transport 2481 if (hci_stack->hci_transport->init){ 2482 hci_stack->hci_transport->init(hci_stack->config); 2483 } 2484 2485 // open transport 2486 err = hci_stack->hci_transport->open(); 2487 if (err){ 2488 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2489 if (hci_stack->control && hci_stack->control->off){ 2490 (*hci_stack->control->off)(); 2491 } 2492 hci_emit_hci_open_failed(); 2493 return err; 2494 } 2495 return 0; 2496 } 2497 2498 static void hci_power_control_off(void){ 2499 2500 log_info("hci_power_control_off"); 2501 2502 // close low-level device 2503 hci_stack->hci_transport->close(); 2504 2505 log_info("hci_power_control_off - hci_transport closed"); 2506 2507 // power off 2508 if (hci_stack->control && hci_stack->control->off){ 2509 (*hci_stack->control->off)(); 2510 } 2511 2512 log_info("hci_power_control_off - control closed"); 2513 2514 hci_stack->state = HCI_STATE_OFF; 2515 } 2516 2517 static void hci_power_control_sleep(void){ 2518 2519 log_info("hci_power_control_sleep"); 2520 2521 #if 0 2522 // don't close serial port during sleep 2523 2524 // close low-level device 2525 hci_stack->hci_transport->close(hci_stack->config); 2526 #endif 2527 2528 // sleep mode 2529 if (hci_stack->control && hci_stack->control->sleep){ 2530 (*hci_stack->control->sleep)(); 2531 } 2532 2533 hci_stack->state = HCI_STATE_SLEEPING; 2534 } 2535 2536 static int hci_power_control_wake(void){ 2537 2538 log_info("hci_power_control_wake"); 2539 2540 // wake on 2541 if (hci_stack->control && hci_stack->control->wake){ 2542 (*hci_stack->control->wake)(); 2543 } 2544 2545 #if 0 2546 // open low-level device 2547 int err = hci_stack->hci_transport->open(hci_stack->config); 2548 if (err){ 2549 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2550 if (hci_stack->control && hci_stack->control->off){ 2551 (*hci_stack->control->off)(); 2552 } 2553 hci_emit_hci_open_failed(); 2554 return err; 2555 } 2556 #endif 2557 2558 return 0; 2559 } 2560 2561 static void hci_power_transition_to_initializing(void){ 2562 // set up state machine 2563 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2564 hci_stack->hci_packet_buffer_reserved = 0; 2565 hci_stack->state = HCI_STATE_INITIALIZING; 2566 hci_stack->substate = HCI_INIT_SEND_RESET; 2567 } 2568 2569 int hci_power_control(HCI_POWER_MODE power_mode){ 2570 2571 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2572 2573 int err = 0; 2574 switch (hci_stack->state){ 2575 2576 case HCI_STATE_OFF: 2577 switch (power_mode){ 2578 case HCI_POWER_ON: 2579 err = hci_power_control_on(); 2580 if (err) { 2581 log_error("hci_power_control_on() error %d", err); 2582 return err; 2583 } 2584 hci_power_transition_to_initializing(); 2585 break; 2586 case HCI_POWER_OFF: 2587 // do nothing 2588 break; 2589 case HCI_POWER_SLEEP: 2590 // do nothing (with SLEEP == OFF) 2591 break; 2592 } 2593 break; 2594 2595 case HCI_STATE_INITIALIZING: 2596 switch (power_mode){ 2597 case HCI_POWER_ON: 2598 // do nothing 2599 break; 2600 case HCI_POWER_OFF: 2601 // no connections yet, just turn it off 2602 hci_power_control_off(); 2603 break; 2604 case HCI_POWER_SLEEP: 2605 // no connections yet, just turn it off 2606 hci_power_control_sleep(); 2607 break; 2608 } 2609 break; 2610 2611 case HCI_STATE_WORKING: 2612 switch (power_mode){ 2613 case HCI_POWER_ON: 2614 // do nothing 2615 break; 2616 case HCI_POWER_OFF: 2617 // see hci_run 2618 hci_stack->state = HCI_STATE_HALTING; 2619 break; 2620 case HCI_POWER_SLEEP: 2621 // see hci_run 2622 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2623 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2624 break; 2625 } 2626 break; 2627 2628 case HCI_STATE_HALTING: 2629 switch (power_mode){ 2630 case HCI_POWER_ON: 2631 hci_power_transition_to_initializing(); 2632 break; 2633 case HCI_POWER_OFF: 2634 // do nothing 2635 break; 2636 case HCI_POWER_SLEEP: 2637 // see hci_run 2638 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2639 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2640 break; 2641 } 2642 break; 2643 2644 case HCI_STATE_FALLING_ASLEEP: 2645 switch (power_mode){ 2646 case HCI_POWER_ON: 2647 2648 #ifdef HAVE_PLATFORM_IPHONE_OS 2649 // nothing to do, if H4 supports power management 2650 if (btstack_control_iphone_power_management_enabled()){ 2651 hci_stack->state = HCI_STATE_INITIALIZING; 2652 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2653 break; 2654 } 2655 #endif 2656 hci_power_transition_to_initializing(); 2657 break; 2658 case HCI_POWER_OFF: 2659 // see hci_run 2660 hci_stack->state = HCI_STATE_HALTING; 2661 break; 2662 case HCI_POWER_SLEEP: 2663 // do nothing 2664 break; 2665 } 2666 break; 2667 2668 case HCI_STATE_SLEEPING: 2669 switch (power_mode){ 2670 case HCI_POWER_ON: 2671 2672 #ifdef HAVE_PLATFORM_IPHONE_OS 2673 // nothing to do, if H4 supports power management 2674 if (btstack_control_iphone_power_management_enabled()){ 2675 hci_stack->state = HCI_STATE_INITIALIZING; 2676 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2677 hci_update_scan_enable(); 2678 break; 2679 } 2680 #endif 2681 err = hci_power_control_wake(); 2682 if (err) return err; 2683 hci_power_transition_to_initializing(); 2684 break; 2685 case HCI_POWER_OFF: 2686 hci_stack->state = HCI_STATE_HALTING; 2687 break; 2688 case HCI_POWER_SLEEP: 2689 // do nothing 2690 break; 2691 } 2692 break; 2693 } 2694 2695 // create internal event 2696 hci_emit_state(); 2697 2698 // trigger next/first action 2699 hci_run(); 2700 2701 return 0; 2702 } 2703 2704 2705 #ifdef ENABLE_CLASSIC 2706 2707 static void hci_update_scan_enable(void){ 2708 // 2 = page scan, 1 = inq scan 2709 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2710 hci_run(); 2711 } 2712 2713 void gap_discoverable_control(uint8_t enable){ 2714 if (enable) enable = 1; // normalize argument 2715 2716 if (hci_stack->discoverable == enable){ 2717 hci_emit_discoverable_enabled(hci_stack->discoverable); 2718 return; 2719 } 2720 2721 hci_stack->discoverable = enable; 2722 hci_update_scan_enable(); 2723 } 2724 2725 void gap_connectable_control(uint8_t enable){ 2726 if (enable) enable = 1; // normalize argument 2727 2728 // don't emit event 2729 if (hci_stack->connectable == enable) return; 2730 2731 hci_stack->connectable = enable; 2732 hci_update_scan_enable(); 2733 } 2734 #endif 2735 2736 void gap_local_bd_addr(bd_addr_t address_buffer){ 2737 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2738 } 2739 2740 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2741 static void hci_host_num_completed_packets(void){ 2742 2743 // create packet manually as arrays are not supported and num_commands should not get reduced 2744 hci_reserve_packet_buffer(); 2745 uint8_t * packet = hci_get_outgoing_packet_buffer(); 2746 2747 uint16_t size = 0; 2748 uint16_t num_handles = 0; 2749 packet[size++] = 0x35; 2750 packet[size++] = 0x0c; 2751 size++; // skip param len 2752 size++; // skip num handles 2753 2754 // add { handle, packets } entries 2755 btstack_linked_item_t * it; 2756 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2757 hci_connection_t * connection = (hci_connection_t *) it; 2758 if (connection->num_packets_completed){ 2759 little_endian_store_16(packet, size, connection->con_handle); 2760 size += 2; 2761 little_endian_store_16(packet, size, connection->num_packets_completed); 2762 size += 2; 2763 // 2764 num_handles++; 2765 connection->num_packets_completed = 0; 2766 } 2767 } 2768 2769 packet[2] = size - 3; 2770 packet[3] = num_handles; 2771 2772 hci_stack->host_completed_packets = 0; 2773 2774 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2775 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2776 2777 // release packet buffer for synchronous transport implementations 2778 if (hci_transport_synchronous()){ 2779 hci_stack->hci_packet_buffer_reserved = 0; 2780 } 2781 } 2782 #endif 2783 2784 static void hci_run(void){ 2785 2786 // log_info("hci_run: entered"); 2787 btstack_linked_item_t * it; 2788 2789 // send continuation fragments first, as they block the prepared packet buffer 2790 if (hci_stack->acl_fragmentation_total_size > 0) { 2791 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2792 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2793 if (connection) { 2794 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2795 hci_send_acl_packet_fragments(connection); 2796 return; 2797 } 2798 } else { 2799 // connection gone -> discard further fragments 2800 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2801 hci_stack->acl_fragmentation_total_size = 0; 2802 hci_stack->acl_fragmentation_pos = 0; 2803 } 2804 } 2805 2806 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2807 // send host num completed packets next as they don't require num_cmd_packets > 0 2808 if (!hci_can_send_comand_packet_transport()) return; 2809 if (hci_stack->host_completed_packets){ 2810 hci_host_num_completed_packets(); 2811 return; 2812 } 2813 #endif 2814 2815 if (!hci_can_send_command_packet_now()) return; 2816 2817 // global/non-connection oriented commands 2818 2819 #ifdef ENABLE_CLASSIC 2820 // decline incoming connections 2821 if (hci_stack->decline_reason){ 2822 uint8_t reason = hci_stack->decline_reason; 2823 hci_stack->decline_reason = 0; 2824 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2825 return; 2826 } 2827 // send scan enable 2828 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2829 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2830 hci_stack->new_scan_enable_value = 0xff; 2831 return; 2832 } 2833 // start/stop inquiry 2834 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 2835 uint8_t duration = hci_stack->inquiry_state; 2836 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2837 hci_send_cmd(&hci_inquiry, HCI_INQUIRY_LAP, duration, 0); 2838 return; 2839 } 2840 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 2841 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 2842 hci_send_cmd(&hci_inquiry_cancel); 2843 return; 2844 } 2845 // remote name request 2846 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 2847 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 2848 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 2849 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 2850 return; 2851 } 2852 // pairing 2853 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 2854 uint8_t state = hci_stack->gap_pairing_state; 2855 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2856 switch (state){ 2857 case GAP_PAIRING_STATE_SEND_PIN: 2858 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, strlen(hci_stack->gap_pairing_pin), hci_stack->gap_pairing_pin); 2859 break; 2860 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 2861 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 2862 break; 2863 case GAP_PAIRING_STATE_SEND_PASSKEY: 2864 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_passkey); 2865 break; 2866 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 2867 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 2868 break; 2869 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 2870 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 2871 break; 2872 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 2873 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 2874 break; 2875 default: 2876 break; 2877 } 2878 return; 2879 } 2880 #endif 2881 2882 #ifdef ENABLE_BLE 2883 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 2884 if ((hci_stack->state == HCI_STATE_WORKING) 2885 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 2886 2887 #ifdef ENABLE_LE_CENTRAL 2888 // handle le scan 2889 switch(hci_stack->le_scanning_state){ 2890 case LE_START_SCAN: 2891 hci_stack->le_scanning_state = LE_SCANNING; 2892 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2893 return; 2894 2895 case LE_STOP_SCAN: 2896 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2897 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2898 return; 2899 default: 2900 break; 2901 } 2902 if (hci_stack->le_scan_type != 0xff){ 2903 // defaults: active scanning, accept all advertisement packets 2904 int scan_type = hci_stack->le_scan_type; 2905 hci_stack->le_scan_type = 0xff; 2906 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); 2907 return; 2908 } 2909 #endif 2910 #ifdef ENABLE_LE_PERIPHERAL 2911 // le advertisement control 2912 if (hci_stack->le_advertisements_todo){ 2913 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2914 } 2915 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2916 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2917 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2918 return; 2919 } 2920 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2921 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2922 hci_send_cmd(&hci_le_set_advertising_parameters, 2923 hci_stack->le_advertisements_interval_min, 2924 hci_stack->le_advertisements_interval_max, 2925 hci_stack->le_advertisements_type, 2926 hci_stack->le_own_addr_type, 2927 hci_stack->le_advertisements_direct_address_type, 2928 hci_stack->le_advertisements_direct_address, 2929 hci_stack->le_advertisements_channel_map, 2930 hci_stack->le_advertisements_filter_policy); 2931 return; 2932 } 2933 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2934 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2935 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, hci_stack->le_advertisements_data); 2936 return; 2937 } 2938 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2939 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2940 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2941 hci_stack->le_scan_response_data); 2942 return; 2943 } 2944 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2945 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2946 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2947 return; 2948 } 2949 #endif 2950 2951 #ifdef ENABLE_LE_CENTRAL 2952 // 2953 // LE Whitelist Management 2954 // 2955 2956 // check if whitelist needs modification 2957 btstack_linked_list_iterator_t lit; 2958 int modification_pending = 0; 2959 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2960 while (btstack_linked_list_iterator_has_next(&lit)){ 2961 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2962 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2963 modification_pending = 1; 2964 break; 2965 } 2966 } 2967 2968 if (modification_pending){ 2969 // stop connnecting if modification pending 2970 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2971 hci_send_cmd(&hci_le_create_connection_cancel); 2972 return; 2973 } 2974 2975 // add/remove entries 2976 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2977 while (btstack_linked_list_iterator_has_next(&lit)){ 2978 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2979 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2980 entry->state = LE_WHITELIST_ON_CONTROLLER; 2981 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2982 return; 2983 2984 } 2985 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2986 bd_addr_t address; 2987 bd_addr_type_t address_type = entry->address_type; 2988 memcpy(address, entry->address, 6); 2989 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2990 btstack_memory_whitelist_entry_free(entry); 2991 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2992 return; 2993 } 2994 } 2995 } 2996 2997 // start connecting 2998 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2999 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3000 bd_addr_t null_addr; 3001 memset(null_addr, 0, 6); 3002 hci_send_cmd(&hci_le_create_connection, 3003 0x0060, // scan interval: 60 ms 3004 0x0030, // scan interval: 30 ms 3005 1, // use whitelist 3006 0, // peer address type 3007 null_addr, // peer bd addr 3008 hci_stack->le_own_addr_type, // our addr type: 3009 hci_stack->le_connection_interval_min, // conn interval min 3010 hci_stack->le_connection_interval_max, // conn interval max 3011 hci_stack->le_connection_latency, // conn latency 3012 hci_stack->le_supervision_timeout, // conn latency 3013 hci_stack->le_minimum_ce_length, // min ce length 3014 hci_stack->le_maximum_ce_length // max ce length 3015 ); 3016 return; 3017 } 3018 #endif 3019 } 3020 #endif 3021 3022 // send pending HCI commands 3023 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3024 hci_connection_t * connection = (hci_connection_t *) it; 3025 3026 switch(connection->state){ 3027 case SEND_CREATE_CONNECTION: 3028 switch(connection->address_type){ 3029 #ifdef ENABLE_CLASSIC 3030 case BD_ADDR_TYPE_CLASSIC: 3031 log_info("sending hci_create_connection"); 3032 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3033 break; 3034 #endif 3035 default: 3036 #ifdef ENABLE_BLE 3037 #ifdef ENABLE_LE_CENTRAL 3038 log_info("sending hci_le_create_connection"); 3039 hci_send_cmd(&hci_le_create_connection, 3040 0x0060, // scan interval: 60 ms 3041 0x0030, // scan interval: 30 ms 3042 0, // don't use whitelist 3043 connection->address_type, // peer address type 3044 connection->address, // peer bd addr 3045 hci_stack->le_own_addr_type, // our addr type: 3046 hci_stack->le_connection_interval_min, // conn interval min 3047 hci_stack->le_connection_interval_max, // conn interval max 3048 hci_stack->le_connection_latency, // conn latency 3049 hci_stack->le_supervision_timeout, // conn latency 3050 hci_stack->le_minimum_ce_length, // min ce length 3051 hci_stack->le_maximum_ce_length // max ce length 3052 ); 3053 connection->state = SENT_CREATE_CONNECTION; 3054 #endif 3055 #endif 3056 break; 3057 } 3058 return; 3059 3060 #ifdef ENABLE_CLASSIC 3061 case RECEIVED_CONNECTION_REQUEST: 3062 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3063 connection->state = ACCEPTED_CONNECTION_REQUEST; 3064 connection->role = HCI_ROLE_SLAVE; 3065 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3066 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 3067 } 3068 return; 3069 #endif 3070 3071 #ifdef ENABLE_BLE 3072 #ifdef ENABLE_LE_CENTRAL 3073 case SEND_CANCEL_CONNECTION: 3074 connection->state = SENT_CANCEL_CONNECTION; 3075 hci_send_cmd(&hci_le_create_connection_cancel); 3076 return; 3077 #endif 3078 #endif 3079 case SEND_DISCONNECT: 3080 connection->state = SENT_DISCONNECT; 3081 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3082 return; 3083 3084 default: 3085 break; 3086 } 3087 3088 #ifdef ENABLE_CLASSIC 3089 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3090 log_info("responding to link key request"); 3091 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3092 link_key_t link_key; 3093 link_key_type_t link_key_type; 3094 if ( hci_stack->link_key_db 3095 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3096 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3097 connection->link_key_type = link_key_type; 3098 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3099 } else { 3100 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3101 } 3102 return; 3103 } 3104 3105 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3106 log_info("denying to pin request"); 3107 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3108 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3109 return; 3110 } 3111 3112 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3113 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3114 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3115 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3116 // tweak authentication requirements 3117 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3118 if (connection->bonding_flags & BONDING_DEDICATED){ 3119 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3120 } 3121 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3122 authreq |= 1; 3123 } 3124 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3125 } else { 3126 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3127 } 3128 return; 3129 } 3130 3131 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3132 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3133 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3134 return; 3135 } 3136 3137 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3138 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3139 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3140 return; 3141 } 3142 3143 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3144 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3145 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3146 return; 3147 } 3148 3149 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3150 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3151 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3152 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3153 return; 3154 } 3155 3156 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3157 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3158 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3159 return; 3160 } 3161 3162 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3163 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3164 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3165 return; 3166 } 3167 #endif 3168 3169 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3170 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3171 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3172 return; 3173 } 3174 3175 #ifdef ENABLE_BLE 3176 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 3177 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3178 3179 uint16_t connection_interval_min = connection->le_conn_interval_min; 3180 connection->le_conn_interval_min = 0; 3181 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 3182 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3183 0x0000, 0xffff); 3184 } 3185 #endif 3186 } 3187 3188 hci_connection_t * connection; 3189 switch (hci_stack->state){ 3190 case HCI_STATE_INITIALIZING: 3191 hci_initializing_run(); 3192 break; 3193 3194 case HCI_STATE_HALTING: 3195 3196 log_info("HCI_STATE_HALTING"); 3197 3198 // free whitelist entries 3199 #ifdef ENABLE_BLE 3200 #ifdef ENABLE_LE_CENTRAL 3201 { 3202 btstack_linked_list_iterator_t lit; 3203 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3204 while (btstack_linked_list_iterator_has_next(&lit)){ 3205 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3206 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3207 btstack_memory_whitelist_entry_free(entry); 3208 } 3209 } 3210 #endif 3211 #endif 3212 // close all open connections 3213 connection = (hci_connection_t *) hci_stack->connections; 3214 if (connection){ 3215 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3216 if (!hci_can_send_command_packet_now()) return; 3217 3218 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3219 3220 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3221 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3222 3223 // ... which would be ignored anyway as we shutdown (free) the connection now 3224 hci_shutdown_connection(connection); 3225 3226 // finally, send the disconnect command 3227 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3228 return; 3229 } 3230 log_info("HCI_STATE_HALTING, calling off"); 3231 3232 // switch mode 3233 hci_power_control_off(); 3234 3235 log_info("HCI_STATE_HALTING, emitting state"); 3236 hci_emit_state(); 3237 log_info("HCI_STATE_HALTING, done"); 3238 break; 3239 3240 case HCI_STATE_FALLING_ASLEEP: 3241 switch(hci_stack->substate) { 3242 case HCI_FALLING_ASLEEP_DISCONNECT: 3243 log_info("HCI_STATE_FALLING_ASLEEP"); 3244 // close all open connections 3245 connection = (hci_connection_t *) hci_stack->connections; 3246 3247 #ifdef HAVE_PLATFORM_IPHONE_OS 3248 // don't close connections, if H4 supports power management 3249 if (btstack_control_iphone_power_management_enabled()){ 3250 connection = NULL; 3251 } 3252 #endif 3253 if (connection){ 3254 3255 // send disconnect 3256 if (!hci_can_send_command_packet_now()) return; 3257 3258 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3259 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3260 3261 // send disconnected event right away - causes higher layer connections to get closed, too. 3262 hci_shutdown_connection(connection); 3263 return; 3264 } 3265 3266 if (hci_classic_supported()){ 3267 // disable page and inquiry scan 3268 if (!hci_can_send_command_packet_now()) return; 3269 3270 log_info("HCI_STATE_HALTING, disabling inq scans"); 3271 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3272 3273 // continue in next sub state 3274 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3275 break; 3276 } 3277 // no break - fall through for ble-only chips 3278 3279 case HCI_FALLING_ASLEEP_COMPLETE: 3280 log_info("HCI_STATE_HALTING, calling sleep"); 3281 #ifdef HAVE_PLATFORM_IPHONE_OS 3282 // don't actually go to sleep, if H4 supports power management 3283 if (btstack_control_iphone_power_management_enabled()){ 3284 // SLEEP MODE reached 3285 hci_stack->state = HCI_STATE_SLEEPING; 3286 hci_emit_state(); 3287 break; 3288 } 3289 #endif 3290 // switch mode 3291 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3292 hci_emit_state(); 3293 break; 3294 3295 default: 3296 break; 3297 } 3298 break; 3299 3300 default: 3301 break; 3302 } 3303 } 3304 3305 int hci_send_cmd_packet(uint8_t *packet, int size){ 3306 // house-keeping 3307 3308 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3309 hci_stack->loopback_mode = packet[3]; 3310 } 3311 3312 #ifdef ENABLE_CLASSIC 3313 bd_addr_t addr; 3314 hci_connection_t * conn; 3315 3316 // create_connection? 3317 if (IS_COMMAND(packet, hci_create_connection)){ 3318 reverse_bd_addr(&packet[3], addr); 3319 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3320 3321 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3322 if (!conn){ 3323 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3324 if (!conn){ 3325 // notify client that alloc failed 3326 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3327 return 0; // don't sent packet to controller 3328 } 3329 conn->state = SEND_CREATE_CONNECTION; 3330 } 3331 log_info("conn state %u", conn->state); 3332 switch (conn->state){ 3333 // if connection active exists 3334 case OPEN: 3335 // and OPEN, emit connection complete command, don't send to controller 3336 hci_emit_connection_complete(addr, conn->con_handle, 0); 3337 return 0; 3338 case SEND_CREATE_CONNECTION: 3339 // connection created by hci, e.g. dedicated bonding 3340 break; 3341 default: 3342 // otherwise, just ignore as it is already in the open process 3343 return 0; 3344 } 3345 conn->state = SENT_CREATE_CONNECTION; 3346 } 3347 3348 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3349 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3350 } 3351 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3352 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3353 } 3354 3355 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3356 if (hci_stack->link_key_db){ 3357 reverse_bd_addr(&packet[3], addr); 3358 hci_stack->link_key_db->delete_link_key(addr); 3359 } 3360 } 3361 3362 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3363 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3364 reverse_bd_addr(&packet[3], addr); 3365 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3366 if (conn){ 3367 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3368 } 3369 } 3370 3371 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3372 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3373 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3374 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3375 reverse_bd_addr(&packet[3], addr); 3376 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3377 if (conn){ 3378 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3379 } 3380 } 3381 3382 #ifdef ENABLE_SCO_OVER_HCI 3383 // setup_synchronous_connection? Voice setting at offset 22 3384 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3385 // TODO: compare to current setting if sco connection already active 3386 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3387 } 3388 // accept_synchronus_connection? Voice setting at offset 18 3389 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3390 // TODO: compare to current setting if sco connection already active 3391 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3392 } 3393 #endif 3394 #endif 3395 3396 #ifdef ENABLE_BLE 3397 #ifdef ENABLE_LE_PERIPHERAL 3398 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3399 hci_stack->le_random_address_set = 1; 3400 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3401 } 3402 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3403 hci_stack->le_advertisements_active = packet[3]; 3404 } 3405 #endif 3406 #ifdef ENABLE_LE_CENTRAL 3407 if (IS_COMMAND(packet, hci_le_create_connection)){ 3408 // white list used? 3409 uint8_t initiator_filter_policy = packet[7]; 3410 switch (initiator_filter_policy){ 3411 case 0: 3412 // whitelist not used 3413 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3414 break; 3415 case 1: 3416 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3417 break; 3418 default: 3419 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3420 break; 3421 } 3422 } 3423 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3424 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3425 } 3426 #endif 3427 #endif 3428 3429 hci_stack->num_cmd_packets--; 3430 3431 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3432 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3433 3434 // release packet buffer for synchronous transport implementations 3435 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3436 hci_stack->hci_packet_buffer_reserved = 0; 3437 } 3438 3439 return err; 3440 } 3441 3442 // disconnect because of security block 3443 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3444 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3445 if (!connection) return; 3446 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3447 } 3448 3449 3450 // Configure Secure Simple Pairing 3451 3452 #ifdef ENABLE_CLASSIC 3453 3454 // enable will enable SSP during init 3455 void gap_ssp_set_enable(int enable){ 3456 hci_stack->ssp_enable = enable; 3457 } 3458 3459 static int hci_local_ssp_activated(void){ 3460 return gap_ssp_supported() && hci_stack->ssp_enable; 3461 } 3462 3463 // if set, BTstack will respond to io capability request using authentication requirement 3464 void gap_ssp_set_io_capability(int io_capability){ 3465 hci_stack->ssp_io_capability = io_capability; 3466 } 3467 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3468 hci_stack->ssp_authentication_requirement = authentication_requirement; 3469 } 3470 3471 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3472 void gap_ssp_set_auto_accept(int auto_accept){ 3473 hci_stack->ssp_auto_accept = auto_accept; 3474 } 3475 #endif 3476 3477 // va_list part of hci_send_cmd 3478 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3479 if (!hci_can_send_command_packet_now()){ 3480 log_error("hci_send_cmd called but cannot send packet now"); 3481 return 0; 3482 } 3483 3484 // for HCI INITIALIZATION 3485 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3486 hci_stack->last_cmd_opcode = cmd->opcode; 3487 3488 hci_reserve_packet_buffer(); 3489 uint8_t * packet = hci_stack->hci_packet_buffer; 3490 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3491 return hci_send_cmd_packet(packet, size); 3492 } 3493 3494 /** 3495 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3496 */ 3497 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3498 va_list argptr; 3499 va_start(argptr, cmd); 3500 int res = hci_send_cmd_va_arg(cmd, argptr); 3501 va_end(argptr); 3502 return res; 3503 } 3504 3505 // Create various non-HCI events. 3506 // TODO: generalize, use table similar to hci_create_command 3507 3508 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3509 // dump packet 3510 if (dump) { 3511 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3512 } 3513 3514 // dispatch to all event handlers 3515 btstack_linked_list_iterator_t it; 3516 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3517 while (btstack_linked_list_iterator_has_next(&it)){ 3518 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3519 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3520 } 3521 } 3522 3523 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3524 if (!hci_stack->acl_packet_handler) return; 3525 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3526 } 3527 3528 #ifdef ENABLE_CLASSIC 3529 static void hci_notify_if_sco_can_send_now(void){ 3530 // notify SCO sender if waiting 3531 if (!hci_stack->sco_waiting_for_can_send_now) return; 3532 if (hci_can_send_sco_packet_now()){ 3533 hci_stack->sco_waiting_for_can_send_now = 0; 3534 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3535 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3536 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3537 } 3538 } 3539 3540 // parsing end emitting has been merged to reduce code size 3541 static void gap_inquiry_explode(uint8_t * packet){ 3542 uint8_t event[15+GAP_INQUIRY_MAX_NAME_LEN]; 3543 3544 uint8_t * eir_data; 3545 ad_context_t context; 3546 const uint8_t * name; 3547 uint8_t name_len; 3548 3549 int event_type = hci_event_packet_get_type(packet); 3550 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 3551 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 3552 3553 // event[1] is set at the end 3554 int i; 3555 for (i=0; i<num_responses;i++){ 3556 memset(event, 0, sizeof(event)); 3557 event[0] = GAP_EVENT_INQUIRY_RESULT; 3558 uint8_t event_size = 18; // if name is not set by EIR 3559 3560 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 3561 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 3562 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 3563 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 3564 3565 switch (event_type){ 3566 case HCI_EVENT_INQUIRY_RESULT: 3567 // 14,15,16,17 = 0, size 18 3568 break; 3569 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3570 event[14] = 1; 3571 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3572 // 16,17 = 0, size 18 3573 break; 3574 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3575 event[14] = 1; 3576 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3577 // for EIR packets, there is only one reponse in it 3578 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 3579 name = NULL; 3580 // EIR data is 240 bytes in EIR event 3581 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 3582 uint8_t data_type = ad_iterator_get_data_type(&context); 3583 uint8_t data_size = ad_iterator_get_data_len(&context); 3584 const uint8_t * data = ad_iterator_get_data(&context); 3585 // Prefer Complete Local Name over Shortend Local Name 3586 switch (data_type){ 3587 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 3588 if (name) continue; 3589 /* explicit fall-through */ 3590 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 3591 name = data; 3592 name_len = data_size; 3593 break; 3594 default: 3595 break; 3596 } 3597 } 3598 if (name){ 3599 event[16] = 1; 3600 // truncate name if needed 3601 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 3602 event[17] = len; 3603 memcpy(&event[18], name, len); 3604 event_size += len; 3605 } 3606 break; 3607 } 3608 event[1] = event_size - 2; 3609 hci_emit_event(event, event_size, 1); 3610 } 3611 } 3612 #endif 3613 3614 void hci_emit_state(void){ 3615 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3616 uint8_t event[3]; 3617 event[0] = BTSTACK_EVENT_STATE; 3618 event[1] = sizeof(event) - 2; 3619 event[2] = hci_stack->state; 3620 hci_emit_event(event, sizeof(event), 1); 3621 } 3622 3623 #ifdef ENABLE_CLASSIC 3624 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3625 uint8_t event[13]; 3626 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3627 event[1] = sizeof(event) - 2; 3628 event[2] = status; 3629 little_endian_store_16(event, 3, con_handle); 3630 reverse_bd_addr(address, &event[5]); 3631 event[11] = 1; // ACL connection 3632 event[12] = 0; // encryption disabled 3633 hci_emit_event(event, sizeof(event), 1); 3634 } 3635 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3636 if (disable_l2cap_timeouts) return; 3637 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3638 uint8_t event[4]; 3639 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3640 event[1] = sizeof(event) - 2; 3641 little_endian_store_16(event, 2, conn->con_handle); 3642 hci_emit_event(event, sizeof(event), 1); 3643 } 3644 #endif 3645 3646 #ifdef ENABLE_BLE 3647 #ifdef ENABLE_LE_CENTRAL 3648 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3649 uint8_t event[21]; 3650 event[0] = HCI_EVENT_LE_META; 3651 event[1] = sizeof(event) - 2; 3652 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3653 event[3] = status; 3654 little_endian_store_16(event, 4, con_handle); 3655 event[6] = 0; // TODO: role 3656 event[7] = address_type; 3657 reverse_bd_addr(address, &event[8]); 3658 little_endian_store_16(event, 14, 0); // interval 3659 little_endian_store_16(event, 16, 0); // latency 3660 little_endian_store_16(event, 18, 0); // supervision timeout 3661 event[20] = 0; // master clock accuracy 3662 hci_emit_event(event, sizeof(event), 1); 3663 } 3664 #endif 3665 #endif 3666 3667 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3668 uint8_t event[6]; 3669 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3670 event[1] = sizeof(event) - 2; 3671 event[2] = 0; // status = OK 3672 little_endian_store_16(event, 3, con_handle); 3673 event[5] = reason; 3674 hci_emit_event(event, sizeof(event), 1); 3675 } 3676 3677 static void hci_emit_nr_connections_changed(void){ 3678 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3679 uint8_t event[3]; 3680 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3681 event[1] = sizeof(event) - 2; 3682 event[2] = nr_hci_connections(); 3683 hci_emit_event(event, sizeof(event), 1); 3684 } 3685 3686 static void hci_emit_hci_open_failed(void){ 3687 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3688 uint8_t event[2]; 3689 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3690 event[1] = sizeof(event) - 2; 3691 hci_emit_event(event, sizeof(event), 1); 3692 } 3693 3694 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3695 log_info("hci_emit_dedicated_bonding_result %u ", status); 3696 uint8_t event[9]; 3697 int pos = 0; 3698 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3699 event[pos++] = sizeof(event) - 2; 3700 event[pos++] = status; 3701 reverse_bd_addr(address, &event[pos]); 3702 hci_emit_event(event, sizeof(event), 1); 3703 } 3704 3705 3706 #ifdef ENABLE_CLASSIC 3707 3708 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3709 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3710 uint8_t event[5]; 3711 int pos = 0; 3712 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3713 event[pos++] = sizeof(event) - 2; 3714 little_endian_store_16(event, 2, con_handle); 3715 pos += 2; 3716 event[pos++] = level; 3717 hci_emit_event(event, sizeof(event), 1); 3718 } 3719 3720 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3721 if (!connection) return LEVEL_0; 3722 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3723 return gap_security_level_for_link_key_type(connection->link_key_type); 3724 } 3725 3726 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3727 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3728 uint8_t event[3]; 3729 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3730 event[1] = sizeof(event) - 2; 3731 event[2] = enabled; 3732 hci_emit_event(event, sizeof(event), 1); 3733 } 3734 3735 #ifdef ENABLE_CLASSIC 3736 // query if remote side supports eSCO 3737 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3738 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3739 if (!connection) return 0; 3740 return connection->remote_supported_feature_eSCO; 3741 } 3742 3743 // query if remote side supports SSP 3744 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3745 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3746 if (!connection) return 0; 3747 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3748 } 3749 3750 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3751 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3752 } 3753 #endif 3754 3755 // GAP API 3756 /** 3757 * @bbrief enable/disable bonding. default is enabled 3758 * @praram enabled 3759 */ 3760 void gap_set_bondable_mode(int enable){ 3761 hci_stack->bondable = enable ? 1 : 0; 3762 } 3763 /** 3764 * @brief Get bondable mode. 3765 * @return 1 if bondable 3766 */ 3767 int gap_get_bondable_mode(void){ 3768 return hci_stack->bondable; 3769 } 3770 3771 /** 3772 * @brief map link keys to security levels 3773 */ 3774 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3775 switch (link_key_type){ 3776 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3777 return LEVEL_4; 3778 case COMBINATION_KEY: 3779 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3780 return LEVEL_3; 3781 default: 3782 return LEVEL_2; 3783 } 3784 } 3785 3786 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3787 log_info("gap_mitm_protection_required_for_security_level %u", level); 3788 return level > LEVEL_2; 3789 } 3790 3791 /** 3792 * @brief get current security level 3793 */ 3794 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3795 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3796 if (!connection) return LEVEL_0; 3797 return gap_security_level_for_connection(connection); 3798 } 3799 3800 /** 3801 * @brief request connection to device to 3802 * @result GAP_AUTHENTICATION_RESULT 3803 */ 3804 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3805 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3806 if (!connection){ 3807 hci_emit_security_level(con_handle, LEVEL_0); 3808 return; 3809 } 3810 gap_security_level_t current_level = gap_security_level(con_handle); 3811 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3812 if (current_level >= requested_level){ 3813 hci_emit_security_level(con_handle, current_level); 3814 return; 3815 } 3816 3817 connection->requested_security_level = requested_level; 3818 3819 #if 0 3820 // sending encryption request without a link key results in an error. 3821 // TODO: figure out how to use it properly 3822 3823 // would enabling ecnryption suffice (>= LEVEL_2)? 3824 if (hci_stack->link_key_db){ 3825 link_key_type_t link_key_type; 3826 link_key_t link_key; 3827 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3828 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3829 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3830 return; 3831 } 3832 } 3833 } 3834 #endif 3835 3836 // try to authenticate connection 3837 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3838 hci_run(); 3839 } 3840 3841 /** 3842 * @brief start dedicated bonding with device. disconnect after bonding 3843 * @param device 3844 * @param request MITM protection 3845 * @result GAP_DEDICATED_BONDING_COMPLETE 3846 */ 3847 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3848 3849 // create connection state machine 3850 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3851 3852 if (!connection){ 3853 return BTSTACK_MEMORY_ALLOC_FAILED; 3854 } 3855 3856 // delete linkn key 3857 gap_drop_link_key_for_bd_addr(device); 3858 3859 // configure LEVEL_2/3, dedicated bonding 3860 connection->state = SEND_CREATE_CONNECTION; 3861 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3862 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3863 connection->bonding_flags = BONDING_DEDICATED; 3864 3865 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3866 3867 // handle: connnection failure (connection complete != ok) 3868 // handle: authentication failure 3869 // handle: disconnect on done 3870 3871 hci_run(); 3872 3873 return 0; 3874 } 3875 #endif 3876 3877 void gap_set_local_name(const char * local_name){ 3878 hci_stack->local_name = local_name; 3879 } 3880 3881 3882 #ifdef ENABLE_BLE 3883 3884 #ifdef ENABLE_LE_CENTRAL 3885 void gap_start_scan(void){ 3886 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3887 hci_stack->le_scanning_state = LE_START_SCAN; 3888 hci_run(); 3889 } 3890 3891 void gap_stop_scan(void){ 3892 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3893 hci_stack->le_scanning_state = LE_STOP_SCAN; 3894 hci_run(); 3895 } 3896 3897 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3898 hci_stack->le_scan_type = scan_type; 3899 hci_stack->le_scan_interval = scan_interval; 3900 hci_stack->le_scan_window = scan_window; 3901 hci_run(); 3902 } 3903 3904 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3905 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3906 if (!conn){ 3907 log_info("gap_connect: no connection exists yet, creating context"); 3908 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3909 if (!conn){ 3910 // notify client that alloc failed 3911 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3912 log_info("gap_connect: failed to alloc hci_connection_t"); 3913 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3914 } 3915 conn->state = SEND_CREATE_CONNECTION; 3916 log_info("gap_connect: send create connection next"); 3917 hci_run(); 3918 return 0; 3919 } 3920 3921 if (!hci_is_le_connection(conn) || 3922 conn->state == SEND_CREATE_CONNECTION || 3923 conn->state == SENT_CREATE_CONNECTION) { 3924 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3925 log_error("gap_connect: classic connection or connect is already being created"); 3926 return GATT_CLIENT_IN_WRONG_STATE; 3927 } 3928 3929 log_info("gap_connect: context exists with state %u", conn->state); 3930 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3931 hci_run(); 3932 return 0; 3933 } 3934 3935 // @assumption: only a single outgoing LE Connection exists 3936 static hci_connection_t * gap_get_outgoing_connection(void){ 3937 btstack_linked_item_t *it; 3938 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3939 hci_connection_t * conn = (hci_connection_t *) it; 3940 if (!hci_is_le_connection(conn)) continue; 3941 switch (conn->state){ 3942 case SEND_CREATE_CONNECTION: 3943 case SENT_CREATE_CONNECTION: 3944 return conn; 3945 default: 3946 break; 3947 }; 3948 } 3949 return NULL; 3950 } 3951 3952 uint8_t gap_connect_cancel(void){ 3953 hci_connection_t * conn = gap_get_outgoing_connection(); 3954 if (!conn) return 0; 3955 switch (conn->state){ 3956 case SEND_CREATE_CONNECTION: 3957 // skip sending create connection and emit event instead 3958 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3959 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3960 btstack_memory_hci_connection_free( conn ); 3961 break; 3962 case SENT_CREATE_CONNECTION: 3963 // request to send cancel connection 3964 conn->state = SEND_CANCEL_CONNECTION; 3965 hci_run(); 3966 break; 3967 default: 3968 break; 3969 } 3970 return 0; 3971 } 3972 #endif 3973 3974 #ifdef ENABLE_LE_CENTRAL 3975 /** 3976 * @brief Set connection parameters for outgoing connections 3977 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 3978 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 3979 * @param conn_latency, default: 4 3980 * @param supervision_timeout (unit: 10ms), default: 720 ms 3981 * @param min_ce_length (unit: 0.625ms), default: 10 ms 3982 * @param max_ce_length (unit: 0.625ms), default: 30 ms 3983 */ 3984 3985 void gap_set_connection_parameters(uint16_t conn_interval_min, uint16_t conn_interval_max, 3986 uint16_t conn_latency, uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 3987 hci_stack->le_connection_interval_min = conn_interval_min; 3988 hci_stack->le_connection_interval_max = conn_interval_max; 3989 hci_stack->le_connection_latency = conn_latency; 3990 hci_stack->le_supervision_timeout = supervision_timeout; 3991 hci_stack->le_minimum_ce_length = min_ce_length; 3992 hci_stack->le_maximum_ce_length = max_ce_length; 3993 } 3994 #endif 3995 3996 /** 3997 * @brief Updates the connection parameters for a given LE connection 3998 * @param handle 3999 * @param conn_interval_min (unit: 1.25ms) 4000 * @param conn_interval_max (unit: 1.25ms) 4001 * @param conn_latency 4002 * @param supervision_timeout (unit: 10ms) 4003 * @returns 0 if ok 4004 */ 4005 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4006 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4007 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4008 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4009 connection->le_conn_interval_min = conn_interval_min; 4010 connection->le_conn_interval_max = conn_interval_max; 4011 connection->le_conn_latency = conn_latency; 4012 connection->le_supervision_timeout = supervision_timeout; 4013 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4014 hci_run(); 4015 return 0; 4016 } 4017 4018 /** 4019 * @brief Request an update of the connection parameter for a given LE connection 4020 * @param handle 4021 * @param conn_interval_min (unit: 1.25ms) 4022 * @param conn_interval_max (unit: 1.25ms) 4023 * @param conn_latency 4024 * @param supervision_timeout (unit: 10ms) 4025 * @returns 0 if ok 4026 */ 4027 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4028 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4029 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4030 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4031 connection->le_conn_interval_min = conn_interval_min; 4032 connection->le_conn_interval_max = conn_interval_max; 4033 connection->le_conn_latency = conn_latency; 4034 connection->le_supervision_timeout = supervision_timeout; 4035 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4036 hci_run(); 4037 return 0; 4038 } 4039 4040 #ifdef ENABLE_LE_PERIPHERAL 4041 4042 static void gap_advertisments_changed(void){ 4043 // disable advertisements before updating adv, scan data, or adv params 4044 if (hci_stack->le_advertisements_active){ 4045 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4046 } 4047 hci_run(); 4048 } 4049 4050 /** 4051 * @brief Set Advertisement Data 4052 * @param advertising_data_length 4053 * @param advertising_data (max 31 octets) 4054 * @note data is not copied, pointer has to stay valid 4055 */ 4056 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4057 hci_stack->le_advertisements_data_len = advertising_data_length; 4058 hci_stack->le_advertisements_data = advertising_data; 4059 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4060 gap_advertisments_changed(); 4061 } 4062 4063 /** 4064 * @brief Set Scan Response Data 4065 * @param advertising_data_length 4066 * @param advertising_data (max 31 octets) 4067 * @note data is not copied, pointer has to stay valid 4068 */ 4069 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4070 hci_stack->le_scan_response_data_len = scan_response_data_length; 4071 hci_stack->le_scan_response_data = scan_response_data; 4072 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4073 gap_advertisments_changed(); 4074 } 4075 4076 /** 4077 * @brief Set Advertisement Parameters 4078 * @param adv_int_min 4079 * @param adv_int_max 4080 * @param adv_type 4081 * @param direct_address_type 4082 * @param direct_address 4083 * @param channel_map 4084 * @param filter_policy 4085 * 4086 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4087 */ 4088 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4089 uint8_t direct_address_typ, bd_addr_t direct_address, 4090 uint8_t channel_map, uint8_t filter_policy) { 4091 4092 hci_stack->le_advertisements_interval_min = adv_int_min; 4093 hci_stack->le_advertisements_interval_max = adv_int_max; 4094 hci_stack->le_advertisements_type = adv_type; 4095 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4096 hci_stack->le_advertisements_channel_map = channel_map; 4097 hci_stack->le_advertisements_filter_policy = filter_policy; 4098 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4099 4100 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4101 gap_advertisments_changed(); 4102 } 4103 4104 /** 4105 * @brief Enable/Disable Advertisements 4106 * @param enabled 4107 */ 4108 void gap_advertisements_enable(int enabled){ 4109 hci_stack->le_advertisements_enabled = enabled; 4110 if (enabled && !hci_stack->le_advertisements_active){ 4111 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4112 } 4113 if (!enabled && hci_stack->le_advertisements_active){ 4114 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4115 } 4116 hci_run(); 4117 } 4118 4119 #endif 4120 4121 void hci_le_set_own_address_type(uint8_t own_address_type){ 4122 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4123 if (own_address_type == hci_stack->le_own_addr_type) return; 4124 hci_stack->le_own_addr_type = own_address_type; 4125 4126 #ifdef ENABLE_LE_PERIPHERAL 4127 // update advertisement parameters, too 4128 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4129 gap_advertisments_changed(); 4130 #endif 4131 #ifdef ENABLE_LE_CENTRAL 4132 // note: we don't update scan parameters or modify ongoing connection attempts 4133 #endif 4134 } 4135 4136 #endif 4137 4138 uint8_t gap_disconnect(hci_con_handle_t handle){ 4139 hci_connection_t * conn = hci_connection_for_handle(handle); 4140 if (!conn){ 4141 hci_emit_disconnection_complete(handle, 0); 4142 return 0; 4143 } 4144 conn->state = SEND_DISCONNECT; 4145 hci_run(); 4146 return 0; 4147 } 4148 4149 /** 4150 * @brief Get connection type 4151 * @param con_handle 4152 * @result connection_type 4153 */ 4154 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4155 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4156 if (!conn) return GAP_CONNECTION_INVALID; 4157 switch (conn->address_type){ 4158 case BD_ADDR_TYPE_LE_PUBLIC: 4159 case BD_ADDR_TYPE_LE_RANDOM: 4160 return GAP_CONNECTION_LE; 4161 case BD_ADDR_TYPE_SCO: 4162 return GAP_CONNECTION_SCO; 4163 case BD_ADDR_TYPE_CLASSIC: 4164 return GAP_CONNECTION_ACL; 4165 default: 4166 return GAP_CONNECTION_INVALID; 4167 } 4168 } 4169 4170 #ifdef ENABLE_BLE 4171 4172 #ifdef ENABLE_LE_CENTRAL 4173 /** 4174 * @brief Auto Connection Establishment - Start Connecting to device 4175 * @param address_typ 4176 * @param address 4177 * @returns 0 if ok 4178 */ 4179 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4180 // check capacity 4181 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4182 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4183 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4184 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4185 entry->address_type = address_type; 4186 memcpy(entry->address, address, 6); 4187 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4188 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4189 hci_run(); 4190 return 0; 4191 } 4192 4193 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4194 btstack_linked_list_iterator_t it; 4195 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4196 while (btstack_linked_list_iterator_has_next(&it)){ 4197 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4198 if (entry->address_type != address_type) continue; 4199 if (memcmp(entry->address, address, 6) != 0) continue; 4200 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4201 // remove from controller if already present 4202 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4203 continue; 4204 } 4205 // direclty remove entry from whitelist 4206 btstack_linked_list_iterator_remove(&it); 4207 btstack_memory_whitelist_entry_free(entry); 4208 } 4209 } 4210 4211 /** 4212 * @brief Auto Connection Establishment - Stop Connecting to device 4213 * @param address_typ 4214 * @param address 4215 * @returns 0 if ok 4216 */ 4217 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4218 hci_remove_from_whitelist(address_type, address); 4219 hci_run(); 4220 return 0; 4221 } 4222 4223 /** 4224 * @brief Auto Connection Establishment - Stop everything 4225 * @note Convenience function to stop all active auto connection attempts 4226 */ 4227 void gap_auto_connection_stop_all(void){ 4228 btstack_linked_list_iterator_t it; 4229 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4230 while (btstack_linked_list_iterator_has_next(&it)){ 4231 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4232 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4233 // remove from controller if already present 4234 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4235 continue; 4236 } 4237 // directly remove entry from whitelist 4238 btstack_linked_list_iterator_remove(&it); 4239 btstack_memory_whitelist_entry_free(entry); 4240 } 4241 hci_run(); 4242 } 4243 #endif 4244 #endif 4245 4246 #ifdef ENABLE_CLASSIC 4247 /** 4248 * @brief Set Extended Inquiry Response data 4249 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4250 * @note has to be done before stack starts up 4251 */ 4252 void gap_set_extended_inquiry_response(const uint8_t * data){ 4253 hci_stack->eir_data = data; 4254 } 4255 4256 /** 4257 * @brief Start GAP Classic Inquiry 4258 * @param duration in 1.28s units 4259 * @return 0 if ok 4260 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4261 */ 4262 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4263 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4264 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4265 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4266 } 4267 hci_stack->inquiry_state = duration_in_1280ms_units; 4268 hci_run(); 4269 return 0; 4270 } 4271 4272 /** 4273 * @brief Stop GAP Classic Inquiry 4274 * @returns 0 if ok 4275 */ 4276 int gap_inquiry_stop(void){ 4277 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN || hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4278 // emit inquiry complete event, before it even started 4279 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4280 hci_emit_event(event, sizeof(event), 1); 4281 return 0; 4282 } 4283 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4284 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4285 hci_run(); 4286 return 0; 4287 } 4288 4289 4290 /** 4291 * @brief Remote Name Request 4292 * @param addr 4293 * @param page_scan_repetition_mode 4294 * @param clock_offset only used when bit 15 is set 4295 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4296 */ 4297 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4298 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4299 memcpy(hci_stack->remote_name_addr, addr, 6); 4300 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4301 hci_stack->remote_name_clock_offset = clock_offset; 4302 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4303 hci_run(); 4304 return 0; 4305 } 4306 4307 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4308 hci_stack->gap_pairing_state = state; 4309 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4310 hci_run(); 4311 return 0; 4312 } 4313 4314 /** 4315 * @brief Legacy Pairing Pin Code Response 4316 * @param addr 4317 * @param pin 4318 * @return 0 if ok 4319 */ 4320 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4321 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4322 hci_stack->gap_pairing_pin = pin; 4323 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4324 } 4325 4326 /** 4327 * @brief Abort Legacy Pairing 4328 * @param addr 4329 * @param pin 4330 * @return 0 if ok 4331 */ 4332 int gap_pin_code_negative(bd_addr_t addr){ 4333 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4334 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4335 } 4336 4337 /** 4338 * @brief SSP Passkey Response 4339 * @param addr 4340 * @param passkey 4341 * @return 0 if ok 4342 */ 4343 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4344 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4345 hci_stack->gap_pairing_passkey = passkey; 4346 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4347 } 4348 4349 /** 4350 * @brief Abort SSP Passkey Entry/Pairing 4351 * @param addr 4352 * @param pin 4353 * @return 0 if ok 4354 */ 4355 int gap_ssp_passkey_negative(bd_addr_t addr){ 4356 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4357 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 4358 } 4359 4360 /** 4361 * @brief Accept SSP Numeric Comparison 4362 * @param addr 4363 * @param passkey 4364 * @return 0 if ok 4365 */ 4366 int gap_ssp_confirmation_response(bd_addr_t addr){ 4367 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4368 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 4369 } 4370 4371 /** 4372 * @brief Abort SSP Numeric Comparison/Pairing 4373 * @param addr 4374 * @param pin 4375 * @return 0 if ok 4376 */ 4377 int gap_ssp_confirmation_negative(bd_addr_t addr){ 4378 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4379 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 4380 } 4381 4382 /** 4383 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4384 * @param inquiry_mode see bluetooth_defines.h 4385 */ 4386 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4387 hci_stack->inquiry_mode = mode; 4388 } 4389 4390 /** 4391 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4392 */ 4393 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4394 hci_stack->sco_voice_setting = voice_setting; 4395 } 4396 4397 /** 4398 * @brief Get SCO Voice Setting 4399 * @return current voice setting 4400 */ 4401 uint16_t hci_get_sco_voice_setting(void){ 4402 return hci_stack->sco_voice_setting; 4403 } 4404 4405 /** @brief Get SCO packet length for current SCO Voice setting 4406 * @note Using SCO packets of the exact length is required for USB transfer 4407 * @return Length of SCO packets in bytes (not audio frames) 4408 */ 4409 int hci_get_sco_packet_length(void){ 4410 // see Core Spec for H2 USB Transfer. 4411 if (hci_stack->sco_voice_setting & 0x0020) return 51; 4412 return 27; 4413 } 4414 #endif 4415 4416 4417 HCI_STATE hci_get_state(void){ 4418 return hci_stack->state; 4419 } 4420 4421 4422 /** 4423 * @brief Set callback for Bluetooth Hardware Error 4424 */ 4425 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 4426 hci_stack->hardware_error_callback = fn; 4427 } 4428 4429 void hci_disconnect_all(void){ 4430 btstack_linked_list_iterator_t it; 4431 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4432 while (btstack_linked_list_iterator_has_next(&it)){ 4433 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4434 if (con->state == SENT_DISCONNECT) continue; 4435 con->state = SEND_DISCONNECT; 4436 } 4437 hci_run(); 4438 } 4439 4440 uint16_t hci_get_manufacturer(void){ 4441 return hci_stack->manufacturer; 4442 } 4443