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 /* 39 * hci.c 40 * 41 * Created by Matthias Ringwald on 4/29/09. 42 * 43 */ 44 45 #include "btstack_config.h" 46 47 48 #ifdef ENABLE_CLASSIC 49 #ifdef HAVE_EMBEDDED_TICK 50 #include "btstack_run_loop_embedded.h" 51 #endif 52 #endif 53 54 #ifdef HAVE_PLATFORM_IPHONE_OS 55 #include "../port/ios/src/btstack_control_iphone.h" 56 #endif 57 58 #ifdef ENABLE_BLE 59 #include "gap.h" 60 #endif 61 62 #include <stdarg.h> 63 #include <string.h> 64 #include <stdio.h> 65 #include <inttypes.h> 66 67 #include "btstack_debug.h" 68 #include "btstack_event.h" 69 #include "btstack_linked_list.h" 70 #include "btstack_memory.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 76 77 #define HCI_CONNECTION_TIMEOUT_MS 10000 78 #define HCI_RESET_RESEND_TIMEOUT_MS 200 79 80 // prototypes 81 #ifdef ENABLE_CLASSIC 82 static void hci_update_scan_enable(void); 83 static void hci_emit_discoverable_enabled(uint8_t enabled); 84 static int hci_local_ssp_activated(void); 85 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 86 static void hci_notify_if_sco_can_send_now(void); 87 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 88 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 89 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 90 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 91 static void hci_connection_timestamp(hci_connection_t *connection); 92 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 93 #endif 94 static int hci_power_control_on(void); 95 static void hci_power_control_off(void); 96 static void hci_state_reset(void); 97 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 98 static void hci_emit_nr_connections_changed(void); 99 static void hci_emit_hci_open_failed(void); 100 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 101 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 102 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 103 static void hci_run(void); 104 static int hci_is_le_connection(hci_connection_t * connection); 105 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 106 107 #ifdef ENABLE_BLE 108 #ifdef ENABLE_LE_CENTRAL 109 // called from test/ble_client/advertising_data_parser.c 110 void le_handle_advertisement_report(uint8_t *packet, int size); 111 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 112 #endif 113 #endif 114 115 // the STACK is here 116 #ifndef HAVE_MALLOC 117 static hci_stack_t hci_stack_static; 118 #endif 119 static hci_stack_t * hci_stack = NULL; 120 121 #ifdef ENABLE_CLASSIC 122 // test helper 123 static uint8_t disable_l2cap_timeouts = 0; 124 #endif 125 126 /** 127 * create connection for given address 128 * 129 * @return connection OR NULL, if no memory left 130 */ 131 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 132 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 133 hci_connection_t * conn = btstack_memory_hci_connection_get(); 134 if (!conn) return NULL; 135 memset(conn, 0, sizeof(hci_connection_t)); 136 bd_addr_copy(conn->address, addr); 137 conn->address_type = addr_type; 138 conn->con_handle = 0xffff; 139 conn->authentication_flags = AUTH_FLAGS_NONE; 140 conn->bonding_flags = 0; 141 conn->requested_security_level = LEVEL_0; 142 #ifdef ENABLE_CLASSIC 143 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 144 btstack_run_loop_set_timer_context(&conn->timeout, conn); 145 hci_connection_timestamp(conn); 146 #endif 147 conn->acl_recombination_length = 0; 148 conn->acl_recombination_pos = 0; 149 conn->num_acl_packets_sent = 0; 150 conn->num_sco_packets_sent = 0; 151 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 152 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 153 return conn; 154 } 155 156 157 /** 158 * get le connection parameter range 159 * 160 * @return le connection parameter range struct 161 */ 162 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 163 *range = hci_stack->le_connection_parameter_range; 164 } 165 166 /** 167 * set le connection parameter range 168 * 169 */ 170 171 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 172 hci_stack->le_connection_parameter_range = *range; 173 } 174 175 /** 176 * get hci connections iterator 177 * 178 * @return hci connections iterator 179 */ 180 181 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 182 btstack_linked_list_iterator_init(it, &hci_stack->connections); 183 } 184 185 /** 186 * get connection for a given handle 187 * 188 * @return connection OR NULL, if not found 189 */ 190 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 191 btstack_linked_list_iterator_t it; 192 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 193 while (btstack_linked_list_iterator_has_next(&it)){ 194 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 195 if ( item->con_handle == con_handle ) { 196 return item; 197 } 198 } 199 return NULL; 200 } 201 202 /** 203 * get connection for given address 204 * 205 * @return connection OR NULL, if not found 206 */ 207 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 208 btstack_linked_list_iterator_t it; 209 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 210 while (btstack_linked_list_iterator_has_next(&it)){ 211 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 212 if (connection->address_type != addr_type) continue; 213 if (memcmp(addr, connection->address, 6) != 0) continue; 214 return connection; 215 } 216 return NULL; 217 } 218 219 220 #ifdef ENABLE_CLASSIC 221 222 #ifdef ENABLE_SCO_OVER_HCI 223 static int hci_number_sco_connections(void){ 224 int connections = 0; 225 btstack_linked_list_iterator_t it; 226 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 227 while (btstack_linked_list_iterator_has_next(&it)){ 228 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 229 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 230 connections++; 231 } 232 return connections; 233 } 234 #endif 235 236 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 237 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 238 #ifdef HAVE_EMBEDDED_TICK 239 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 240 // connections might be timed out 241 hci_emit_l2cap_check_timeout(connection); 242 } 243 #else 244 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 245 // connections might be timed out 246 hci_emit_l2cap_check_timeout(connection); 247 } 248 #endif 249 } 250 251 static void hci_connection_timestamp(hci_connection_t *connection){ 252 #ifdef HAVE_EMBEDDED_TICK 253 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 254 #else 255 connection->timestamp = btstack_run_loop_get_time_ms(); 256 #endif 257 } 258 259 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 260 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 261 } 262 263 264 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 265 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 266 } 267 268 /** 269 * add authentication flags and reset timer 270 * @note: assumes classic connection 271 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 272 */ 273 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 274 bd_addr_t addr; 275 reverse_bd_addr(bd_addr, addr); 276 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 277 if (conn) { 278 connectionSetAuthenticationFlags(conn, flags); 279 hci_connection_timestamp(conn); 280 } 281 } 282 283 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 284 hci_connection_t * conn = hci_connection_for_handle(handle); 285 if (!conn) return 0; 286 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 287 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 288 return 0; 289 } 290 291 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 292 if (!hci_stack->link_key_db) return; 293 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 294 hci_stack->link_key_db->delete_link_key(addr); 295 } 296 297 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 298 if (!hci_stack->link_key_db) return; 299 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 300 hci_stack->link_key_db->put_link_key(addr, link_key, type); 301 } 302 #endif 303 304 static int hci_is_le_connection(hci_connection_t * connection){ 305 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 306 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 307 } 308 309 /** 310 * count connections 311 */ 312 static int nr_hci_connections(void){ 313 int count = 0; 314 btstack_linked_item_t *it; 315 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 316 return count; 317 } 318 319 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 320 321 unsigned int num_packets_sent_classic = 0; 322 unsigned int num_packets_sent_le = 0; 323 324 btstack_linked_item_t *it; 325 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 326 hci_connection_t * connection = (hci_connection_t *) it; 327 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 328 num_packets_sent_classic += connection->num_acl_packets_sent; 329 } else { 330 num_packets_sent_le += connection->num_acl_packets_sent; 331 } 332 } 333 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 334 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 335 int free_slots_le = 0; 336 337 if (free_slots_classic < 0){ 338 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); 339 return 0; 340 } 341 342 if (hci_stack->le_acl_packets_total_num){ 343 // if we have LE slots, they are used 344 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 345 if (free_slots_le < 0){ 346 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); 347 return 0; 348 } 349 } else { 350 // otherwise, classic slots are used for LE, too 351 free_slots_classic -= num_packets_sent_le; 352 if (free_slots_classic < 0){ 353 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); 354 return 0; 355 } 356 } 357 358 switch (address_type){ 359 case BD_ADDR_TYPE_UNKNOWN: 360 log_error("hci_number_free_acl_slots: unknown address type"); 361 return 0; 362 363 case BD_ADDR_TYPE_CLASSIC: 364 return free_slots_classic; 365 366 default: 367 if (hci_stack->le_acl_packets_total_num){ 368 return free_slots_le; 369 } 370 return free_slots_classic; 371 } 372 } 373 374 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 375 // get connection type 376 hci_connection_t * connection = hci_connection_for_handle(con_handle); 377 if (!connection){ 378 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 379 return 0; 380 } 381 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 382 } 383 384 #ifdef ENABLE_CLASSIC 385 static int hci_number_free_sco_slots(void){ 386 unsigned int num_sco_packets_sent = 0; 387 btstack_linked_item_t *it; 388 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 389 hci_connection_t * connection = (hci_connection_t *) it; 390 num_sco_packets_sent += connection->num_sco_packets_sent; 391 } 392 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 393 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 394 return 0; 395 } 396 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 397 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 398 } 399 #endif 400 401 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 402 int hci_can_send_command_packet_now(void){ 403 if (hci_stack->hci_packet_buffer_reserved) return 0; 404 405 // check for async hci transport implementations 406 if (hci_stack->hci_transport->can_send_packet_now){ 407 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 408 return 0; 409 } 410 } 411 412 return hci_stack->num_cmd_packets > 0; 413 } 414 415 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 416 // check for async hci transport implementations 417 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 418 return hci_stack->hci_transport->can_send_packet_now(packet_type); 419 } 420 421 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 422 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 423 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 424 } 425 426 int hci_can_send_acl_le_packet_now(void){ 427 if (hci_stack->hci_packet_buffer_reserved) return 0; 428 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 429 } 430 431 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 432 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 433 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 434 } 435 436 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 437 if (hci_stack->hci_packet_buffer_reserved) return 0; 438 return hci_can_send_prepared_acl_packet_now(con_handle); 439 } 440 441 #ifdef ENABLE_CLASSIC 442 int hci_can_send_acl_classic_packet_now(void){ 443 if (hci_stack->hci_packet_buffer_reserved) return 0; 444 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 445 } 446 447 int hci_can_send_prepared_sco_packet_now(void){ 448 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 449 if (!hci_stack->synchronous_flow_control_enabled) return 1; 450 return hci_number_free_sco_slots() > 0; 451 } 452 453 int hci_can_send_sco_packet_now(void){ 454 if (hci_stack->hci_packet_buffer_reserved) return 0; 455 return hci_can_send_prepared_sco_packet_now(); 456 } 457 458 void hci_request_sco_can_send_now_event(void){ 459 hci_stack->sco_waiting_for_can_send_now = 1; 460 hci_notify_if_sco_can_send_now(); 461 } 462 #endif 463 464 // used for internal checks in l2cap.c 465 int hci_is_packet_buffer_reserved(void){ 466 return hci_stack->hci_packet_buffer_reserved; 467 } 468 469 // reserves outgoing packet buffer. @returns 1 if successful 470 int hci_reserve_packet_buffer(void){ 471 if (hci_stack->hci_packet_buffer_reserved) { 472 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 473 return 0; 474 } 475 hci_stack->hci_packet_buffer_reserved = 1; 476 return 1; 477 } 478 479 void hci_release_packet_buffer(void){ 480 hci_stack->hci_packet_buffer_reserved = 0; 481 } 482 483 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 484 static int hci_transport_synchronous(void){ 485 return hci_stack->hci_transport->can_send_packet_now == NULL; 486 } 487 488 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 489 490 // 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); 491 492 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 493 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 494 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 495 max_acl_data_packet_length = hci_stack->le_data_packets_length; 496 } 497 498 // testing: reduce buffer to minimum 499 // max_acl_data_packet_length = 52; 500 501 log_debug("hci_send_acl_packet_fragments entered"); 502 503 int err; 504 // multiple packets could be send on a synchronous HCI transport 505 while (1){ 506 507 log_debug("hci_send_acl_packet_fragments loop entered"); 508 509 // get current data 510 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 511 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 512 int more_fragments = 0; 513 514 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 515 if (current_acl_data_packet_length > max_acl_data_packet_length){ 516 more_fragments = 1; 517 current_acl_data_packet_length = max_acl_data_packet_length; 518 } 519 520 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 521 if (acl_header_pos > 0){ 522 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 523 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 524 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 525 } 526 527 // update header len 528 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 529 530 // count packet 531 connection->num_acl_packets_sent++; 532 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 533 534 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 535 if (more_fragments){ 536 // update start of next fragment to send 537 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 538 } else { 539 // done 540 hci_stack->acl_fragmentation_pos = 0; 541 hci_stack->acl_fragmentation_total_size = 0; 542 } 543 544 // send packet 545 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 546 const int size = current_acl_data_packet_length + 4; 547 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 548 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 549 550 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 551 552 // done yet? 553 if (!more_fragments) break; 554 555 // can send more? 556 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 557 } 558 559 log_debug("hci_send_acl_packet_fragments loop over"); 560 561 // release buffer now for synchronous transport 562 if (hci_transport_synchronous()){ 563 hci_release_packet_buffer(); 564 // notify upper stack that it might be possible to send again 565 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 566 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 567 } 568 569 return err; 570 } 571 572 // pre: caller has reserved the packet buffer 573 int hci_send_acl_packet_buffer(int size){ 574 575 // log_info("hci_send_acl_packet_buffer size %u", size); 576 577 if (!hci_stack->hci_packet_buffer_reserved) { 578 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 579 return 0; 580 } 581 582 uint8_t * packet = hci_stack->hci_packet_buffer; 583 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 584 585 // check for free places on Bluetooth module 586 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 587 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 588 hci_release_packet_buffer(); 589 return BTSTACK_ACL_BUFFERS_FULL; 590 } 591 592 hci_connection_t *connection = hci_connection_for_handle( con_handle); 593 if (!connection) { 594 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 595 hci_release_packet_buffer(); 596 return 0; 597 } 598 599 #ifdef ENABLE_CLASSIC 600 hci_connection_timestamp(connection); 601 #endif 602 603 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 604 605 // setup data 606 hci_stack->acl_fragmentation_total_size = size; 607 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 608 609 return hci_send_acl_packet_fragments(connection); 610 } 611 612 #ifdef ENABLE_CLASSIC 613 // pre: caller has reserved the packet buffer 614 int hci_send_sco_packet_buffer(int size){ 615 616 // log_info("hci_send_acl_packet_buffer size %u", size); 617 618 if (!hci_stack->hci_packet_buffer_reserved) { 619 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 620 return 0; 621 } 622 623 uint8_t * packet = hci_stack->hci_packet_buffer; 624 625 // skip checks in loopback mode 626 if (!hci_stack->loopback_mode){ 627 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 628 629 // check for free places on Bluetooth module 630 if (!hci_can_send_prepared_sco_packet_now()) { 631 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 632 hci_release_packet_buffer(); 633 return BTSTACK_ACL_BUFFERS_FULL; 634 } 635 636 // track send packet in connection struct 637 hci_connection_t *connection = hci_connection_for_handle( con_handle); 638 if (!connection) { 639 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 640 hci_release_packet_buffer(); 641 return 0; 642 } 643 connection->num_sco_packets_sent++; 644 } 645 646 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 647 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 648 649 if (hci_transport_synchronous()){ 650 hci_release_packet_buffer(); 651 // notify upper stack that it might be possible to send again 652 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 653 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 654 } 655 656 return err; 657 } 658 #endif 659 660 static void acl_handler(uint8_t *packet, int size){ 661 662 // log_info("acl_handler: size %u", size); 663 664 // get info 665 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 666 hci_connection_t *conn = hci_connection_for_handle(con_handle); 667 uint8_t acl_flags = READ_ACL_FLAGS(packet); 668 uint16_t acl_length = READ_ACL_LENGTH(packet); 669 670 // ignore non-registered handle 671 if (!conn){ 672 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 673 return; 674 } 675 676 // assert packet is complete 677 if (acl_length + 4 != size){ 678 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 679 return; 680 } 681 682 #ifdef ENABLE_CLASSIC 683 // update idle timestamp 684 hci_connection_timestamp(conn); 685 #endif 686 687 // handle different packet types 688 switch (acl_flags & 0x03) { 689 690 case 0x01: // continuation fragment 691 692 // sanity checks 693 if (conn->acl_recombination_pos == 0) { 694 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 695 return; 696 } 697 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 698 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 699 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 700 conn->acl_recombination_pos = 0; 701 return; 702 } 703 704 // append fragment payload (header already stored) 705 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 706 conn->acl_recombination_pos += acl_length; 707 708 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 709 // conn->acl_recombination_pos, conn->acl_recombination_length); 710 711 // forward complete L2CAP packet if complete. 712 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 713 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 714 // reset recombination buffer 715 conn->acl_recombination_length = 0; 716 conn->acl_recombination_pos = 0; 717 } 718 break; 719 720 case 0x02: { // first fragment 721 722 // sanity check 723 if (conn->acl_recombination_pos) { 724 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 725 conn->acl_recombination_pos = 0; 726 } 727 728 // peek into L2CAP packet! 729 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 730 731 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 732 733 // compare fragment size to L2CAP packet size 734 if (acl_length >= l2cap_length + 4){ 735 // forward fragment as L2CAP packet 736 hci_emit_acl_packet(packet, acl_length + 4); 737 } else { 738 739 if (acl_length > HCI_ACL_BUFFER_SIZE){ 740 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 741 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 742 return; 743 } 744 745 // store first fragment and tweak acl length for complete package 746 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 747 conn->acl_recombination_pos = acl_length + 4; 748 conn->acl_recombination_length = l2cap_length; 749 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 750 } 751 break; 752 753 } 754 default: 755 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 756 return; 757 } 758 759 // execute main loop 760 hci_run(); 761 } 762 763 static void hci_shutdown_connection(hci_connection_t *conn){ 764 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 765 766 #ifdef ENABLE_SCO_OVER_HCI 767 int addr_type = conn->address_type; 768 #endif 769 770 btstack_run_loop_remove_timer(&conn->timeout); 771 772 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 773 btstack_memory_hci_connection_free( conn ); 774 775 // now it's gone 776 hci_emit_nr_connections_changed(); 777 778 // update SCO 779 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 780 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 781 } 782 } 783 784 #ifdef ENABLE_CLASSIC 785 786 static const uint16_t packet_type_sizes[] = { 787 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 788 HCI_ACL_DH1_SIZE, 0, 0, 0, 789 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 790 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 791 }; 792 static const uint8_t packet_type_feature_requirement_bit[] = { 793 0, // 3 slot packets 794 1, // 5 slot packets 795 25, // EDR 2 mpbs 796 26, // EDR 3 mbps 797 39, // 3 slot EDR packts 798 40, // 5 slot EDR packet 799 }; 800 static const uint16_t packet_type_feature_packet_mask[] = { 801 0x0f00, // 3 slot packets 802 0xf000, // 5 slot packets 803 0x1102, // EDR 2 mpbs 804 0x2204, // EDR 3 mbps 805 0x0300, // 3 slot EDR packts 806 0x3000, // 5 slot EDR packet 807 }; 808 809 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 810 // enable packet types based on size 811 uint16_t packet_types = 0; 812 unsigned int i; 813 for (i=0;i<16;i++){ 814 if (packet_type_sizes[i] == 0) continue; 815 if (packet_type_sizes[i] <= buffer_size){ 816 packet_types |= 1 << i; 817 } 818 } 819 // disable packet types due to missing local supported features 820 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 821 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 822 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 823 if (feature_set) continue; 824 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 825 packet_types &= ~packet_type_feature_packet_mask[i]; 826 } 827 // flip bits for "may not be used" 828 packet_types ^= 0x3306; 829 return packet_types; 830 } 831 832 uint16_t hci_usable_acl_packet_types(void){ 833 return hci_stack->packet_types; 834 } 835 #endif 836 837 uint8_t* hci_get_outgoing_packet_buffer(void){ 838 // hci packet buffer is >= acl data packet length 839 return hci_stack->hci_packet_buffer; 840 } 841 842 uint16_t hci_max_acl_data_packet_length(void){ 843 return hci_stack->acl_data_packet_length; 844 } 845 846 #ifdef ENABLE_CLASSIC 847 int hci_extended_sco_link_supported(void){ 848 // No. 31, byte 3, bit 7 849 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 850 } 851 #endif 852 853 int hci_non_flushable_packet_boundary_flag_supported(void){ 854 // No. 54, byte 6, bit 6 855 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 856 } 857 858 static int gap_ssp_supported(void){ 859 // No. 51, byte 6, bit 3 860 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 861 } 862 863 static int hci_classic_supported(void){ 864 #ifdef ENABLE_CLASSIC 865 // No. 37, byte 4, bit 5, = No BR/EDR Support 866 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 867 #else 868 return 0; 869 #endif 870 } 871 872 static int hci_le_supported(void){ 873 #ifdef ENABLE_BLE 874 // No. 37, byte 4, bit 6 = LE Supported (Controller) 875 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 876 #else 877 return 0; 878 #endif 879 } 880 881 #ifdef ENABLE_BLE 882 883 /** 884 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 885 */ 886 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 887 *addr_type = hci_stack->le_own_addr_type; 888 if (hci_stack->le_own_addr_type){ 889 memcpy(addr, hci_stack->le_random_address, 6); 890 } else { 891 memcpy(addr, hci_stack->local_bd_addr, 6); 892 } 893 } 894 895 #ifdef ENABLE_LE_CENTRAL 896 void le_handle_advertisement_report(uint8_t *packet, int size){ 897 898 UNUSED(size); 899 900 int offset = 3; 901 int num_reports = packet[offset]; 902 offset += 1; 903 904 int i; 905 // log_info("HCI: handle adv report with num reports: %d", num_reports); 906 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 907 for (i=0; i<num_reports;i++){ 908 uint8_t data_length = packet[offset + 8]; 909 uint8_t event_size = 10 + data_length; 910 int pos = 0; 911 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 912 event[pos++] = event_size; 913 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 914 offset += 8; 915 pos += 8; 916 event[pos++] = packet[offset + 1 + data_length]; // rssi 917 event[pos++] = packet[offset++]; //data_length; 918 memcpy(&event[pos], &packet[offset], data_length); 919 pos += data_length; 920 offset += data_length + 1; // rssi 921 hci_emit_event(event, pos, 1); 922 } 923 } 924 #endif 925 #endif 926 927 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 928 929 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 930 if (!hci_stack->config) return 0; 931 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 932 // Limit baud rate for Broadcom chipsets to 3 mbps 933 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 934 baud_rate = 3000000; 935 } 936 return baud_rate; 937 } 938 939 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 940 UNUSED(ds); 941 942 switch (hci_stack->substate){ 943 case HCI_INIT_W4_SEND_RESET: 944 log_info("Resend HCI Reset"); 945 hci_stack->substate = HCI_INIT_SEND_RESET; 946 hci_stack->num_cmd_packets = 1; 947 hci_run(); 948 break; 949 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 950 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 951 if (hci_stack->hci_transport->reset_link){ 952 hci_stack->hci_transport->reset_link(); 953 } 954 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 955 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 956 log_info("Resend HCI Reset - CSR Warm Boot"); 957 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 958 hci_stack->num_cmd_packets = 1; 959 hci_run(); 960 break; 961 case HCI_INIT_W4_SEND_BAUD_CHANGE: 962 if (hci_stack->hci_transport->set_baudrate){ 963 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 964 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 965 hci_stack->hci_transport->set_baudrate(baud_rate); 966 } 967 // For CSR, HCI Reset is sent on new baud rate 968 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 969 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 970 hci_run(); 971 } 972 break; 973 default: 974 break; 975 } 976 } 977 #endif 978 979 static void hci_initializing_next_state(void){ 980 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 981 } 982 983 // assumption: hci_can_send_command_packet_now() == true 984 static void hci_initializing_run(void){ 985 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 986 switch (hci_stack->substate){ 987 case HCI_INIT_SEND_RESET: 988 hci_state_reset(); 989 990 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 991 // prepare reset if command complete not received in 100ms 992 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 993 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 994 btstack_run_loop_add_timer(&hci_stack->timeout); 995 #endif 996 // send command 997 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 998 hci_send_cmd(&hci_reset); 999 break; 1000 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1001 hci_send_cmd(&hci_read_local_version_information); 1002 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1003 break; 1004 case HCI_INIT_SEND_READ_LOCAL_NAME: 1005 hci_send_cmd(&hci_read_local_name); 1006 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1007 break; 1008 1009 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1010 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1011 hci_state_reset(); 1012 // prepare reset if command complete not received in 100ms 1013 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1014 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1015 btstack_run_loop_add_timer(&hci_stack->timeout); 1016 // send command 1017 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1018 hci_send_cmd(&hci_reset); 1019 break; 1020 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1021 hci_state_reset(); 1022 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1023 hci_send_cmd(&hci_reset); 1024 break; 1025 case HCI_INIT_SEND_BAUD_CHANGE: { 1026 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1027 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1028 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1029 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1030 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1031 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1032 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1033 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1034 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1035 btstack_run_loop_add_timer(&hci_stack->timeout); 1036 } 1037 break; 1038 } 1039 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1040 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1041 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1042 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1043 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1044 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1045 break; 1046 } 1047 case HCI_INIT_CUSTOM_INIT: 1048 // Custom initialization 1049 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1050 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1051 if (valid_cmd){ 1052 int size = 3 + hci_stack->hci_packet_buffer[2]; 1053 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1054 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1055 switch (valid_cmd) { 1056 case 1: 1057 default: 1058 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1059 break; 1060 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1061 log_info("CSR Warm Boot"); 1062 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1063 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1064 btstack_run_loop_add_timer(&hci_stack->timeout); 1065 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1066 && hci_stack->config 1067 && hci_stack->chipset 1068 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1069 && hci_stack->hci_transport->set_baudrate 1070 && hci_transport_uart_get_main_baud_rate()){ 1071 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1072 } else { 1073 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1074 } 1075 break; 1076 } 1077 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1078 break; 1079 } 1080 log_info("Init script done"); 1081 1082 // Init script download causes baud rate to reset on Broadcom chipsets, restore UART baud rate if needed 1083 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1084 int need_baud_change = hci_stack->config 1085 && hci_stack->chipset 1086 && hci_stack->chipset->set_baudrate_command 1087 && hci_stack->hci_transport->set_baudrate 1088 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1089 if (need_baud_change) { 1090 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1091 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1092 hci_stack->hci_transport->set_baudrate(baud_rate); 1093 } 1094 } 1095 } 1096 // otherwise continue 1097 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1098 hci_send_cmd(&hci_read_local_supported_commands); 1099 break; 1100 case HCI_INIT_SET_BD_ADDR: 1101 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1102 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1103 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1104 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1105 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1106 break; 1107 #endif 1108 1109 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1110 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1111 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1112 hci_send_cmd(&hci_read_local_supported_commands); 1113 break; 1114 case HCI_INIT_READ_BD_ADDR: 1115 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1116 hci_send_cmd(&hci_read_bd_addr); 1117 break; 1118 case HCI_INIT_READ_BUFFER_SIZE: 1119 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1120 hci_send_cmd(&hci_read_buffer_size); 1121 break; 1122 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1123 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1124 hci_send_cmd(&hci_read_local_supported_features); 1125 break; 1126 case HCI_INIT_SET_EVENT_MASK: 1127 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1128 if (hci_le_supported()){ 1129 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1130 } else { 1131 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1132 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1133 } 1134 break; 1135 #ifdef ENABLE_CLASSIC 1136 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1137 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1138 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1139 break; 1140 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1141 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1142 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1143 break; 1144 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1145 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1146 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1147 break; 1148 case HCI_INIT_WRITE_LOCAL_NAME: 1149 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1150 if (hci_stack->local_name){ 1151 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1152 } else { 1153 char local_name[8+17+1]; 1154 // BTstack 11:22:33:44:55:66 1155 memcpy(local_name, "BTstack ", 8); 1156 memcpy(&local_name[8], bd_addr_to_str(hci_stack->local_bd_addr), 17); // strlen(bd_addr_to_str(...)) = 17 1157 local_name[8+17] = '\0'; 1158 log_info("---> Name %s", local_name); 1159 hci_send_cmd(&hci_write_local_name, local_name); 1160 } 1161 break; 1162 case HCI_INIT_WRITE_EIR_DATA: 1163 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1164 hci_send_cmd(&hci_write_extended_inquiry_response, 0, hci_stack->eir_data); 1165 break; 1166 case HCI_INIT_WRITE_INQUIRY_MODE: 1167 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1168 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1169 break; 1170 case HCI_INIT_WRITE_SCAN_ENABLE: 1171 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1172 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1173 break; 1174 // only sent if ENABLE_SCO_OVER_HCI is defined 1175 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1176 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1177 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1178 break; 1179 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1180 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1181 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1182 break; 1183 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1184 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1185 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1186 log_info("BCM: Route SCO data via HCI transport"); 1187 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1188 break; 1189 1190 #endif 1191 #ifdef ENABLE_BLE 1192 // LE INIT 1193 case HCI_INIT_LE_READ_BUFFER_SIZE: 1194 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1195 hci_send_cmd(&hci_le_read_buffer_size); 1196 break; 1197 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1198 // LE Supported Host = 1, Simultaneous Host = 0 1199 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1200 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1201 break; 1202 #ifdef ENABLE_LE_CENTRAL 1203 case HCI_INIT_READ_WHITE_LIST_SIZE: 1204 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1205 hci_send_cmd(&hci_le_read_white_list_size); 1206 break; 1207 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1208 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1209 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1210 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1211 break; 1212 #endif 1213 #endif 1214 default: 1215 return; 1216 } 1217 } 1218 1219 static void hci_init_done(void){ 1220 // done. tell the app 1221 log_info("hci_init_done -> HCI_STATE_WORKING"); 1222 hci_stack->state = HCI_STATE_WORKING; 1223 hci_emit_state(); 1224 hci_run(); 1225 } 1226 1227 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1228 UNUSED(size); 1229 1230 uint8_t command_completed = 0; 1231 1232 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1233 uint16_t opcode = little_endian_read_16(packet,3); 1234 if (opcode == hci_stack->last_cmd_opcode){ 1235 command_completed = 1; 1236 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1237 } else { 1238 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1239 } 1240 } 1241 1242 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1243 uint8_t status = packet[2]; 1244 uint16_t opcode = little_endian_read_16(packet,4); 1245 if (opcode == hci_stack->last_cmd_opcode){ 1246 if (status){ 1247 command_completed = 1; 1248 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1249 } else { 1250 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1251 } 1252 } else { 1253 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1254 } 1255 } 1256 1257 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1258 1259 // Vendor == CSR 1260 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1261 // TODO: track actual command 1262 command_completed = 1; 1263 } 1264 1265 // Vendor == Toshiba 1266 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1267 // TODO: track actual command 1268 command_completed = 1; 1269 } 1270 1271 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1272 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1273 // 1274 // HCI Reset 1275 // Timeout 100 ms 1276 // HCI Reset 1277 // Command Complete Reset 1278 // HCI Read Local Version Information 1279 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1280 // hang... 1281 // 1282 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1283 if (!command_completed 1284 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1285 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1286 1287 uint16_t opcode = little_endian_read_16(packet,3); 1288 if (opcode == hci_reset.opcode){ 1289 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1290 return; 1291 } 1292 } 1293 1294 // CSR & H5 1295 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1296 if (!command_completed 1297 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1298 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1299 1300 uint16_t opcode = little_endian_read_16(packet,3); 1301 if (opcode == hci_reset.opcode){ 1302 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1303 return; 1304 } 1305 } 1306 1307 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1308 // fix: Correct substate and behave as command below 1309 if (command_completed){ 1310 switch (hci_stack->substate){ 1311 case HCI_INIT_SEND_RESET: 1312 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1313 break; 1314 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1315 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1316 break; 1317 default: 1318 break; 1319 } 1320 } 1321 1322 #endif 1323 1324 if (!command_completed) return; 1325 1326 int need_baud_change = 0; 1327 int need_addr_change = 0; 1328 1329 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1330 need_baud_change = hci_stack->config 1331 && hci_stack->chipset 1332 && hci_stack->chipset->set_baudrate_command 1333 && hci_stack->hci_transport->set_baudrate 1334 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1335 1336 need_addr_change = hci_stack->custom_bd_addr_set 1337 && hci_stack->chipset 1338 && hci_stack->chipset->set_bd_addr_command; 1339 #endif 1340 1341 switch(hci_stack->substate){ 1342 1343 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1344 case HCI_INIT_SEND_RESET: 1345 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1346 // fix: just correct substate and behave as command below 1347 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1348 btstack_run_loop_remove_timer(&hci_stack->timeout); 1349 break; 1350 case HCI_INIT_W4_SEND_RESET: 1351 btstack_run_loop_remove_timer(&hci_stack->timeout); 1352 break; 1353 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1354 log_info("Received local name, need baud change %d", need_baud_change); 1355 if (need_baud_change){ 1356 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1357 return; 1358 } 1359 // skip baud change 1360 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1361 return; 1362 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1363 // for STLC2500D, baud rate change already happened. 1364 // for others, baud rate gets changed now 1365 if ((hci_stack->manufacturer != COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1366 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1367 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1368 hci_stack->hci_transport->set_baudrate(baud_rate); 1369 } 1370 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1371 return; 1372 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1373 btstack_run_loop_remove_timer(&hci_stack->timeout); 1374 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1375 return; 1376 case HCI_INIT_W4_CUSTOM_INIT: 1377 // repeat custom init 1378 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1379 return; 1380 #else 1381 case HCI_INIT_W4_SEND_RESET: 1382 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1383 return ; 1384 #endif 1385 1386 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1387 if (need_baud_change && hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1388 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1389 return; 1390 } 1391 if (need_addr_change){ 1392 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1393 return; 1394 } 1395 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1396 return; 1397 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1398 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1399 if (need_baud_change){ 1400 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1401 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1402 hci_stack->hci_transport->set_baudrate(baud_rate); 1403 } 1404 if (need_addr_change){ 1405 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1406 return; 1407 } 1408 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1409 return; 1410 case HCI_INIT_W4_SET_BD_ADDR: 1411 // for STLC2500D, bd addr change only gets active after sending reset command 1412 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1413 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1414 return; 1415 } 1416 // skipping st warm boot 1417 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1418 return; 1419 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1420 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1421 return; 1422 #endif 1423 case HCI_INIT_W4_READ_BD_ADDR: 1424 // only read buffer size if supported 1425 if (hci_stack->local_supported_commands[0] & 0x01) { 1426 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1427 return; 1428 } 1429 // skipping read buffer size 1430 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1431 return; 1432 case HCI_INIT_W4_SET_EVENT_MASK: 1433 // skip Classic init commands for LE only chipsets 1434 if (!hci_classic_supported()){ 1435 #ifdef ENABLE_BLE 1436 if (hci_le_supported()){ 1437 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1438 return; 1439 } 1440 #endif 1441 log_error("Neither BR/EDR nor LE supported"); 1442 hci_init_done(); 1443 return; 1444 } 1445 if (!gap_ssp_supported()){ 1446 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1447 return; 1448 } 1449 break; 1450 #ifdef ENABLE_BLE 1451 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1452 // skip write le host if not supported (e.g. on LE only EM9301) 1453 if (hci_stack->local_supported_commands[0] & 0x02) break; 1454 #ifdef ENABLE_LE_CENTRAL 1455 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1456 #else 1457 hci_init_done(); 1458 #endif 1459 return; 1460 #endif 1461 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1462 // skip write eir data if no eir data set 1463 if (hci_stack->eir_data) break; 1464 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1465 return; 1466 1467 #ifdef ENABLE_SCO_OVER_HCI 1468 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1469 // skip write synchronous flow control if not supported 1470 if (hci_stack->local_supported_commands[0] & 0x04) break; 1471 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1472 // explicit fall through to reduce repetitions 1473 1474 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1475 // skip write default erroneous data reporting if not supported 1476 if (hci_stack->local_supported_commands[0] & 0x08) break; 1477 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1478 // explicit fall through to reduce repetitions 1479 1480 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1481 // skip bcm set sco pcm config on non-Broadcom chipsets 1482 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION) break; 1483 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1484 // explicit fall through to reduce repetitions 1485 1486 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1487 if (!hci_le_supported()){ 1488 // SKIP LE init for Classic only configuration 1489 hci_init_done(); 1490 return; 1491 } 1492 break; 1493 #else 1494 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1495 if (!hci_le_supported()){ 1496 // SKIP LE init for Classic only configuration 1497 hci_init_done(); 1498 return; 1499 } 1500 #endif 1501 break; 1502 // Response to command before init done state -> init done 1503 case (HCI_INIT_DONE-1): 1504 hci_init_done(); 1505 return; 1506 1507 default: 1508 break; 1509 } 1510 hci_initializing_next_state(); 1511 } 1512 1513 static void event_handler(uint8_t *packet, int size){ 1514 1515 uint16_t event_length = packet[1]; 1516 1517 // assert packet is complete 1518 if (size != event_length + 2){ 1519 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1520 return; 1521 } 1522 1523 bd_addr_t addr; 1524 bd_addr_type_t addr_type; 1525 uint8_t link_type; 1526 hci_con_handle_t handle; 1527 hci_connection_t * conn; 1528 int i; 1529 1530 // warnings 1531 (void) link_type; 1532 1533 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1534 1535 switch (hci_event_packet_get_type(packet)) { 1536 1537 case HCI_EVENT_COMMAND_COMPLETE: 1538 // get num cmd packets - limit to 1 to reduce complexity 1539 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1540 1541 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1542 if (packet[5]) break; 1543 // terminate, name 248 chars 1544 packet[6+248] = 0; 1545 log_info("local name: %s", &packet[6]); 1546 } 1547 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1548 // from offset 5 1549 // status 1550 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1551 hci_stack->acl_data_packet_length = little_endian_read_16(packet, 6); 1552 hci_stack->sco_data_packet_length = packet[8]; 1553 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1554 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1555 1556 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1557 // determine usable ACL payload size 1558 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1559 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1560 } 1561 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1562 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1563 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1564 } 1565 } 1566 #ifdef ENABLE_BLE 1567 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1568 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1569 hci_stack->le_acl_packets_total_num = packet[8]; 1570 // determine usable ACL payload size 1571 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1572 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1573 } 1574 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1575 } 1576 #ifdef ENABLE_LE_CENTRAL 1577 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1578 hci_stack->le_whitelist_capacity = packet[6]; 1579 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1580 } 1581 #endif 1582 #endif 1583 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1584 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1585 hci_stack->local_bd_addr); 1586 log_info("Local Address, Status: 0x%02x: Addr: %s", 1587 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1588 #ifdef ENABLE_CLASSIC 1589 if (hci_stack->link_key_db){ 1590 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1591 } 1592 #endif 1593 } 1594 #ifdef ENABLE_CLASSIC 1595 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1596 hci_emit_discoverable_enabled(hci_stack->discoverable); 1597 } 1598 #endif 1599 1600 // Note: HCI init checks 1601 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1602 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1603 1604 #ifdef ENABLE_CLASSIC 1605 // determine usable ACL packet types based on host buffer size and supported features 1606 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1607 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1608 #endif 1609 // Classic/LE 1610 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1611 } 1612 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1613 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1614 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1615 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1616 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1617 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1618 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1619 } 1620 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1621 hci_stack->local_supported_commands[0] = 1622 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1623 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1624 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1625 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08); // bit 3 = Octet 18, bit 3 1626 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1627 } 1628 #ifdef ENABLE_CLASSIC 1629 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1630 if (packet[5] == 0){ 1631 hci_stack->synchronous_flow_control_enabled = 1; 1632 } 1633 } 1634 #endif 1635 break; 1636 1637 case HCI_EVENT_COMMAND_STATUS: 1638 // get num cmd packets - limit to 1 to reduce complexity 1639 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1640 break; 1641 1642 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1643 int offset = 3; 1644 for (i=0; i<packet[2];i++){ 1645 handle = little_endian_read_16(packet, offset); 1646 offset += 2; 1647 uint16_t num_packets = little_endian_read_16(packet, offset); 1648 offset += 2; 1649 1650 conn = hci_connection_for_handle(handle); 1651 if (!conn){ 1652 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1653 continue; 1654 } 1655 1656 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1657 #ifdef ENABLE_CLASSIC 1658 if (conn->num_sco_packets_sent >= num_packets){ 1659 conn->num_sco_packets_sent -= num_packets; 1660 } else { 1661 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1662 conn->num_sco_packets_sent = 0; 1663 } 1664 hci_notify_if_sco_can_send_now(); 1665 #endif 1666 } else { 1667 if (conn->num_acl_packets_sent >= num_packets){ 1668 conn->num_acl_packets_sent -= num_packets; 1669 } else { 1670 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1671 conn->num_acl_packets_sent = 0; 1672 } 1673 } 1674 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1675 } 1676 break; 1677 } 1678 1679 #ifdef ENABLE_CLASSIC 1680 case HCI_EVENT_CONNECTION_REQUEST: 1681 reverse_bd_addr(&packet[2], addr); 1682 // TODO: eval COD 8-10 1683 link_type = packet[11]; 1684 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1685 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1686 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1687 if (!conn) { 1688 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1689 } 1690 if (!conn) { 1691 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1692 hci_stack->decline_reason = 0x0d; 1693 bd_addr_copy(hci_stack->decline_addr, addr); 1694 break; 1695 } 1696 conn->role = HCI_ROLE_SLAVE; 1697 conn->state = RECEIVED_CONNECTION_REQUEST; 1698 // store info about eSCO 1699 if (link_type == 0x02){ 1700 conn->remote_supported_feature_eSCO = 1; 1701 } 1702 hci_run(); 1703 break; 1704 1705 case HCI_EVENT_CONNECTION_COMPLETE: 1706 // Connection management 1707 reverse_bd_addr(&packet[5], addr); 1708 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1709 addr_type = BD_ADDR_TYPE_CLASSIC; 1710 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1711 if (conn) { 1712 if (!packet[2]){ 1713 conn->state = OPEN; 1714 conn->con_handle = little_endian_read_16(packet, 3); 1715 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1716 1717 // restart timer 1718 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1719 btstack_run_loop_add_timer(&conn->timeout); 1720 1721 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1722 1723 hci_emit_nr_connections_changed(); 1724 } else { 1725 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1726 uint8_t status = packet[2]; 1727 bd_addr_t bd_address; 1728 memcpy(&bd_address, conn->address, 6); 1729 1730 // connection failed, remove entry 1731 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1732 btstack_memory_hci_connection_free( conn ); 1733 1734 // notify client if dedicated bonding 1735 if (notify_dedicated_bonding_failed){ 1736 log_info("hci notify_dedicated_bonding_failed"); 1737 hci_emit_dedicated_bonding_result(bd_address, status); 1738 } 1739 1740 // if authentication error, also delete link key 1741 if (packet[2] == 0x05) { 1742 gap_drop_link_key_for_bd_addr(addr); 1743 } 1744 } 1745 } 1746 break; 1747 1748 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1749 reverse_bd_addr(&packet[5], addr); 1750 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1751 if (packet[2]){ 1752 // connection failed 1753 break; 1754 } 1755 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1756 if (!conn) { 1757 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1758 } 1759 if (!conn) { 1760 break; 1761 } 1762 conn->state = OPEN; 1763 conn->con_handle = little_endian_read_16(packet, 3); 1764 1765 #ifdef ENABLE_SCO_OVER_HCI 1766 // update SCO 1767 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 1768 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1769 } 1770 #endif 1771 break; 1772 1773 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1774 handle = little_endian_read_16(packet, 3); 1775 conn = hci_connection_for_handle(handle); 1776 if (!conn) break; 1777 if (!packet[2]){ 1778 uint8_t * features = &packet[5]; 1779 if (features[6] & (1 << 3)){ 1780 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1781 } 1782 if (features[3] & (1<<7)){ 1783 conn->remote_supported_feature_eSCO = 1; 1784 } 1785 } 1786 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1787 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1788 if (conn->bonding_flags & BONDING_DEDICATED){ 1789 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1790 } 1791 break; 1792 1793 case HCI_EVENT_LINK_KEY_REQUEST: 1794 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1795 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1796 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1797 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1798 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1799 hci_run(); 1800 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1801 return; 1802 1803 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1804 reverse_bd_addr(&packet[2], addr); 1805 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1806 if (!conn) break; 1807 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1808 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1809 // Change Connection Encryption keeps link key type 1810 if (link_key_type != CHANGED_COMBINATION_KEY){ 1811 conn->link_key_type = link_key_type; 1812 } 1813 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1814 // still forward event to allow dismiss of pairing dialog 1815 break; 1816 } 1817 1818 case HCI_EVENT_PIN_CODE_REQUEST: 1819 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1820 // non-bondable mode: pin code negative reply will be sent 1821 if (!hci_stack->bondable){ 1822 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1823 hci_run(); 1824 return; 1825 } 1826 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1827 if (!hci_stack->link_key_db) break; 1828 hci_event_pin_code_request_get_bd_addr(packet, addr); 1829 hci_stack->link_key_db->delete_link_key(addr); 1830 break; 1831 1832 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1833 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1834 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1835 break; 1836 1837 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1838 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1839 if (!hci_stack->ssp_auto_accept) break; 1840 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1841 break; 1842 1843 case HCI_EVENT_USER_PASSKEY_REQUEST: 1844 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1845 if (!hci_stack->ssp_auto_accept) break; 1846 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1847 break; 1848 #endif 1849 1850 case HCI_EVENT_ENCRYPTION_CHANGE: 1851 handle = little_endian_read_16(packet, 3); 1852 conn = hci_connection_for_handle(handle); 1853 if (!conn) break; 1854 if (packet[2] == 0) { 1855 if (packet[5]){ 1856 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1857 } else { 1858 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1859 } 1860 } 1861 #ifdef ENABLE_CLASSIC 1862 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1863 #endif 1864 break; 1865 1866 #ifdef ENABLE_CLASSIC 1867 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1868 handle = little_endian_read_16(packet, 3); 1869 conn = hci_connection_for_handle(handle); 1870 if (!conn) break; 1871 1872 // dedicated bonding: send result and disconnect 1873 if (conn->bonding_flags & BONDING_DEDICATED){ 1874 conn->bonding_flags &= ~BONDING_DEDICATED; 1875 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1876 conn->bonding_status = packet[2]; 1877 break; 1878 } 1879 1880 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1881 // link key sufficient for requested security 1882 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1883 break; 1884 } 1885 // not enough 1886 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1887 break; 1888 #endif 1889 1890 // HCI_EVENT_DISCONNECTION_COMPLETE 1891 // has been split, to first notify stack before shutting connection down 1892 // see end of function, too. 1893 case HCI_EVENT_DISCONNECTION_COMPLETE: 1894 if (packet[2]) break; // status != 0 1895 handle = little_endian_read_16(packet, 3); 1896 // drop outgoing ACL fragments if it is for closed connection 1897 if (hci_stack->acl_fragmentation_total_size > 0) { 1898 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 1899 log_info("hci: drop fragmented ACL data for closed connection"); 1900 hci_stack->acl_fragmentation_total_size = 0; 1901 hci_stack->acl_fragmentation_pos = 0; 1902 } 1903 } 1904 1905 // re-enable advertisements for le connections if active 1906 conn = hci_connection_for_handle(handle); 1907 if (!conn) break; 1908 #ifdef ENABLE_BLE 1909 #ifdef ENABLE_LE_PERIPHERAL 1910 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1911 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1912 } 1913 #endif 1914 #endif 1915 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1916 break; 1917 1918 case HCI_EVENT_HARDWARE_ERROR: 1919 log_error("Hardware Error: 0x%02x", packet[2]); 1920 if (hci_stack->hardware_error_callback){ 1921 (*hci_stack->hardware_error_callback)(packet[2]); 1922 } else { 1923 // if no special requests, just reboot stack 1924 hci_power_control_off(); 1925 hci_power_control_on(); 1926 } 1927 break; 1928 1929 #ifdef ENABLE_CLASSIC 1930 case HCI_EVENT_ROLE_CHANGE: 1931 if (packet[2]) break; // status != 0 1932 handle = little_endian_read_16(packet, 3); 1933 conn = hci_connection_for_handle(handle); 1934 if (!conn) break; // no conn 1935 conn->role = packet[9]; 1936 break; 1937 #endif 1938 1939 case HCI_EVENT_TRANSPORT_PACKET_SENT: 1940 // release packet buffer only for asynchronous transport and if there are not further fragements 1941 if (hci_transport_synchronous()) { 1942 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 1943 return; // instead of break: to avoid re-entering hci_run() 1944 } 1945 if (hci_stack->acl_fragmentation_total_size) break; 1946 hci_release_packet_buffer(); 1947 1948 // L2CAP receives this event via the hci_emit_event below 1949 1950 #ifdef ENABLE_CLASSIC 1951 // For SCO, we do the can_send_now_check here 1952 hci_notify_if_sco_can_send_now(); 1953 #endif 1954 break; 1955 1956 #ifdef ENABLE_CLASSIC 1957 case HCI_EVENT_SCO_CAN_SEND_NOW: 1958 // For SCO, we do the can_send_now_check here 1959 hci_notify_if_sco_can_send_now(); 1960 return; 1961 #endif 1962 1963 #ifdef ENABLE_BLE 1964 case HCI_EVENT_LE_META: 1965 switch (packet[2]){ 1966 #ifdef ENABLE_LE_CENTRAL 1967 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1968 // log_info("advertising report received"); 1969 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1970 le_handle_advertisement_report(packet, size); 1971 break; 1972 #endif 1973 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1974 // Connection management 1975 reverse_bd_addr(&packet[8], addr); 1976 addr_type = (bd_addr_type_t)packet[7]; 1977 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1978 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1979 #ifdef ENABLE_LE_CENTRAL 1980 // if auto-connect, remove from whitelist in both roles 1981 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1982 hci_remove_from_whitelist(addr_type, addr); 1983 } 1984 // handle error: error is reported only to the initiator -> outgoing connection 1985 if (packet[3]){ 1986 // outgoing connection establishment is done 1987 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1988 // remove entry 1989 if (conn){ 1990 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1991 btstack_memory_hci_connection_free( conn ); 1992 } 1993 break; 1994 } 1995 #endif 1996 // on success, both hosts receive connection complete event 1997 if (packet[6] == HCI_ROLE_MASTER){ 1998 #ifdef ENABLE_LE_CENTRAL 1999 // if we're master, it was an outgoing connection and we're done with it 2000 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2001 #endif 2002 } else { 2003 #ifdef ENABLE_LE_PERIPHERAL 2004 // if we're slave, it was an incoming connection, advertisements have stopped 2005 hci_stack->le_advertisements_active = 0; 2006 // try to re-enable them 2007 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2008 #endif 2009 } 2010 // LE connections are auto-accepted, so just create a connection if there isn't one already 2011 if (!conn){ 2012 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2013 } 2014 // no memory, sorry. 2015 if (!conn){ 2016 break; 2017 } 2018 2019 conn->state = OPEN; 2020 conn->role = packet[6]; 2021 conn->con_handle = little_endian_read_16(packet, 4); 2022 2023 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2024 2025 // restart timer 2026 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2027 // btstack_run_loop_add_timer(&conn->timeout); 2028 2029 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2030 2031 hci_emit_nr_connections_changed(); 2032 break; 2033 2034 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2035 2036 default: 2037 break; 2038 } 2039 break; 2040 #endif 2041 default: 2042 break; 2043 } 2044 2045 // handle BT initialization 2046 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2047 hci_initializing_event_handler(packet, size); 2048 } 2049 2050 // help with BT sleep 2051 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2052 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2053 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2054 hci_initializing_next_state(); 2055 } 2056 2057 // notify upper stack 2058 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2059 2060 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2061 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2062 if (!packet[2]){ 2063 handle = little_endian_read_16(packet, 3); 2064 hci_connection_t * aConn = hci_connection_for_handle(handle); 2065 if (aConn) { 2066 uint8_t status = aConn->bonding_status; 2067 uint16_t flags = aConn->bonding_flags; 2068 bd_addr_t bd_address; 2069 memcpy(&bd_address, aConn->address, 6); 2070 hci_shutdown_connection(aConn); 2071 // connection struct is gone, don't access anymore 2072 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2073 hci_emit_dedicated_bonding_result(bd_address, status); 2074 } 2075 } 2076 } 2077 } 2078 2079 // execute main loop 2080 hci_run(); 2081 } 2082 2083 #ifdef ENABLE_CLASSIC 2084 static void sco_handler(uint8_t * packet, uint16_t size){ 2085 if (!hci_stack->sco_packet_handler) return; 2086 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2087 } 2088 #endif 2089 2090 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2091 hci_dump_packet(packet_type, 1, packet, size); 2092 switch (packet_type) { 2093 case HCI_EVENT_PACKET: 2094 event_handler(packet, size); 2095 break; 2096 case HCI_ACL_DATA_PACKET: 2097 acl_handler(packet, size); 2098 break; 2099 #ifdef ENABLE_CLASSIC 2100 case HCI_SCO_DATA_PACKET: 2101 sco_handler(packet, size); 2102 break; 2103 #endif 2104 default: 2105 break; 2106 } 2107 } 2108 2109 /** 2110 * @brief Add event packet handler. 2111 */ 2112 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2113 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2114 } 2115 2116 2117 /** Register HCI packet handlers */ 2118 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2119 hci_stack->acl_packet_handler = handler; 2120 } 2121 2122 #ifdef ENABLE_CLASSIC 2123 /** 2124 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2125 */ 2126 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2127 hci_stack->sco_packet_handler = handler; 2128 } 2129 #endif 2130 2131 static void hci_state_reset(void){ 2132 // no connections yet 2133 hci_stack->connections = NULL; 2134 2135 // keep discoverable/connectable as this has been requested by the client(s) 2136 // hci_stack->discoverable = 0; 2137 // hci_stack->connectable = 0; 2138 // hci_stack->bondable = 1; 2139 // hci_stack->own_addr_type = 0; 2140 2141 // buffer is free 2142 hci_stack->hci_packet_buffer_reserved = 0; 2143 2144 // no pending cmds 2145 hci_stack->decline_reason = 0; 2146 hci_stack->new_scan_enable_value = 0xff; 2147 2148 // LE 2149 #ifdef ENABLE_BLE 2150 memset(hci_stack->le_random_address, 0, 6); 2151 hci_stack->le_random_address_set = 0; 2152 #endif 2153 #ifdef ENABLE_LE_CENTRAL 2154 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2155 hci_stack->le_scan_type = 0xff; 2156 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2157 hci_stack->le_whitelist = 0; 2158 hci_stack->le_whitelist_capacity = 0; 2159 #endif 2160 2161 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2162 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2163 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2164 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2165 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2166 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2167 } 2168 2169 #ifdef ENABLE_CLASSIC 2170 /** 2171 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2172 */ 2173 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2174 // store and open remote device db 2175 hci_stack->link_key_db = link_key_db; 2176 if (hci_stack->link_key_db) { 2177 hci_stack->link_key_db->open(); 2178 } 2179 } 2180 #endif 2181 2182 void hci_init(const hci_transport_t *transport, const void *config){ 2183 2184 #ifdef HAVE_MALLOC 2185 if (!hci_stack) { 2186 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2187 } 2188 #else 2189 hci_stack = &hci_stack_static; 2190 #endif 2191 memset(hci_stack, 0, sizeof(hci_stack_t)); 2192 2193 // reference to use transport layer implementation 2194 hci_stack->hci_transport = transport; 2195 2196 // reference to used config 2197 hci_stack->config = config; 2198 2199 // setup pointer for outgoing packet buffer 2200 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2201 2202 // max acl payload size defined in config.h 2203 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2204 2205 // register packet handlers with transport 2206 transport->register_packet_handler(&packet_handler); 2207 2208 hci_stack->state = HCI_STATE_OFF; 2209 2210 // class of device 2211 hci_stack->class_of_device = 0x007a020c; // Smartphone 2212 2213 // bondable by default 2214 hci_stack->bondable = 1; 2215 2216 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2217 hci_stack->ssp_enable = 1; 2218 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2219 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2220 hci_stack->ssp_auto_accept = 1; 2221 2222 // voice setting - signed 16 bit pcm data with CVSD over the air 2223 hci_stack->sco_voice_setting = 0x60; 2224 2225 hci_state_reset(); 2226 } 2227 2228 /** 2229 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2230 */ 2231 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2232 hci_stack->chipset = chipset_driver; 2233 2234 // reset chipset driver - init is also called on power_up 2235 if (hci_stack->chipset && hci_stack->chipset->init){ 2236 hci_stack->chipset->init(hci_stack->config); 2237 } 2238 } 2239 2240 /** 2241 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2242 */ 2243 void hci_set_control(const btstack_control_t *hardware_control){ 2244 // references to used control implementation 2245 hci_stack->control = hardware_control; 2246 // init with transport config 2247 hardware_control->init(hci_stack->config); 2248 } 2249 2250 void hci_close(void){ 2251 // close remote device db 2252 if (hci_stack->link_key_db) { 2253 hci_stack->link_key_db->close(); 2254 } 2255 2256 btstack_linked_list_iterator_t lit; 2257 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2258 while (btstack_linked_list_iterator_has_next(&lit)){ 2259 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2260 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2261 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2262 hci_shutdown_connection(connection); 2263 } 2264 2265 hci_power_control(HCI_POWER_OFF); 2266 2267 #ifdef HAVE_MALLOC 2268 free(hci_stack); 2269 #endif 2270 hci_stack = NULL; 2271 } 2272 2273 #ifdef ENABLE_CLASSIC 2274 void gap_set_class_of_device(uint32_t class_of_device){ 2275 hci_stack->class_of_device = class_of_device; 2276 } 2277 2278 void hci_disable_l2cap_timeout_check(void){ 2279 disable_l2cap_timeouts = 1; 2280 } 2281 #endif 2282 2283 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2284 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2285 void hci_set_bd_addr(bd_addr_t addr){ 2286 memcpy(hci_stack->custom_bd_addr, addr, 6); 2287 hci_stack->custom_bd_addr_set = 1; 2288 } 2289 #endif 2290 2291 // State-Module-Driver overview 2292 // state module low-level 2293 // HCI_STATE_OFF off close 2294 // HCI_STATE_INITIALIZING, on open 2295 // HCI_STATE_WORKING, on open 2296 // HCI_STATE_HALTING, on open 2297 // HCI_STATE_SLEEPING, off/sleep close 2298 // HCI_STATE_FALLING_ASLEEP on open 2299 2300 static int hci_power_control_on(void){ 2301 2302 // power on 2303 int err = 0; 2304 if (hci_stack->control && hci_stack->control->on){ 2305 err = (*hci_stack->control->on)(); 2306 } 2307 if (err){ 2308 log_error( "POWER_ON failed"); 2309 hci_emit_hci_open_failed(); 2310 return err; 2311 } 2312 2313 // int chipset driver 2314 if (hci_stack->chipset && hci_stack->chipset->init){ 2315 hci_stack->chipset->init(hci_stack->config); 2316 } 2317 2318 // init transport 2319 if (hci_stack->hci_transport->init){ 2320 hci_stack->hci_transport->init(hci_stack->config); 2321 } 2322 2323 // open transport 2324 err = hci_stack->hci_transport->open(); 2325 if (err){ 2326 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2327 if (hci_stack->control && hci_stack->control->off){ 2328 (*hci_stack->control->off)(); 2329 } 2330 hci_emit_hci_open_failed(); 2331 return err; 2332 } 2333 return 0; 2334 } 2335 2336 static void hci_power_control_off(void){ 2337 2338 log_info("hci_power_control_off"); 2339 2340 // close low-level device 2341 hci_stack->hci_transport->close(); 2342 2343 log_info("hci_power_control_off - hci_transport closed"); 2344 2345 // power off 2346 if (hci_stack->control && hci_stack->control->off){ 2347 (*hci_stack->control->off)(); 2348 } 2349 2350 log_info("hci_power_control_off - control closed"); 2351 2352 hci_stack->state = HCI_STATE_OFF; 2353 } 2354 2355 static void hci_power_control_sleep(void){ 2356 2357 log_info("hci_power_control_sleep"); 2358 2359 #if 0 2360 // don't close serial port during sleep 2361 2362 // close low-level device 2363 hci_stack->hci_transport->close(hci_stack->config); 2364 #endif 2365 2366 // sleep mode 2367 if (hci_stack->control && hci_stack->control->sleep){ 2368 (*hci_stack->control->sleep)(); 2369 } 2370 2371 hci_stack->state = HCI_STATE_SLEEPING; 2372 } 2373 2374 static int hci_power_control_wake(void){ 2375 2376 log_info("hci_power_control_wake"); 2377 2378 // wake on 2379 if (hci_stack->control && hci_stack->control->wake){ 2380 (*hci_stack->control->wake)(); 2381 } 2382 2383 #if 0 2384 // open low-level device 2385 int err = hci_stack->hci_transport->open(hci_stack->config); 2386 if (err){ 2387 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2388 if (hci_stack->control && hci_stack->control->off){ 2389 (*hci_stack->control->off)(); 2390 } 2391 hci_emit_hci_open_failed(); 2392 return err; 2393 } 2394 #endif 2395 2396 return 0; 2397 } 2398 2399 static void hci_power_transition_to_initializing(void){ 2400 // set up state machine 2401 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2402 hci_stack->hci_packet_buffer_reserved = 0; 2403 hci_stack->state = HCI_STATE_INITIALIZING; 2404 hci_stack->substate = HCI_INIT_SEND_RESET; 2405 } 2406 2407 int hci_power_control(HCI_POWER_MODE power_mode){ 2408 2409 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2410 2411 int err = 0; 2412 switch (hci_stack->state){ 2413 2414 case HCI_STATE_OFF: 2415 switch (power_mode){ 2416 case HCI_POWER_ON: 2417 err = hci_power_control_on(); 2418 if (err) { 2419 log_error("hci_power_control_on() error %d", err); 2420 return err; 2421 } 2422 hci_power_transition_to_initializing(); 2423 break; 2424 case HCI_POWER_OFF: 2425 // do nothing 2426 break; 2427 case HCI_POWER_SLEEP: 2428 // do nothing (with SLEEP == OFF) 2429 break; 2430 } 2431 break; 2432 2433 case HCI_STATE_INITIALIZING: 2434 switch (power_mode){ 2435 case HCI_POWER_ON: 2436 // do nothing 2437 break; 2438 case HCI_POWER_OFF: 2439 // no connections yet, just turn it off 2440 hci_power_control_off(); 2441 break; 2442 case HCI_POWER_SLEEP: 2443 // no connections yet, just turn it off 2444 hci_power_control_sleep(); 2445 break; 2446 } 2447 break; 2448 2449 case HCI_STATE_WORKING: 2450 switch (power_mode){ 2451 case HCI_POWER_ON: 2452 // do nothing 2453 break; 2454 case HCI_POWER_OFF: 2455 // see hci_run 2456 hci_stack->state = HCI_STATE_HALTING; 2457 break; 2458 case HCI_POWER_SLEEP: 2459 // see hci_run 2460 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2461 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2462 break; 2463 } 2464 break; 2465 2466 case HCI_STATE_HALTING: 2467 switch (power_mode){ 2468 case HCI_POWER_ON: 2469 hci_power_transition_to_initializing(); 2470 break; 2471 case HCI_POWER_OFF: 2472 // do nothing 2473 break; 2474 case HCI_POWER_SLEEP: 2475 // see hci_run 2476 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2477 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2478 break; 2479 } 2480 break; 2481 2482 case HCI_STATE_FALLING_ASLEEP: 2483 switch (power_mode){ 2484 case HCI_POWER_ON: 2485 2486 #ifdef HAVE_PLATFORM_IPHONE_OS 2487 // nothing to do, if H4 supports power management 2488 if (btstack_control_iphone_power_management_enabled()){ 2489 hci_stack->state = HCI_STATE_INITIALIZING; 2490 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2491 break; 2492 } 2493 #endif 2494 hci_power_transition_to_initializing(); 2495 break; 2496 case HCI_POWER_OFF: 2497 // see hci_run 2498 hci_stack->state = HCI_STATE_HALTING; 2499 break; 2500 case HCI_POWER_SLEEP: 2501 // do nothing 2502 break; 2503 } 2504 break; 2505 2506 case HCI_STATE_SLEEPING: 2507 switch (power_mode){ 2508 case HCI_POWER_ON: 2509 2510 #ifdef HAVE_PLATFORM_IPHONE_OS 2511 // nothing to do, if H4 supports power management 2512 if (btstack_control_iphone_power_management_enabled()){ 2513 hci_stack->state = HCI_STATE_INITIALIZING; 2514 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2515 hci_update_scan_enable(); 2516 break; 2517 } 2518 #endif 2519 err = hci_power_control_wake(); 2520 if (err) return err; 2521 hci_power_transition_to_initializing(); 2522 break; 2523 case HCI_POWER_OFF: 2524 hci_stack->state = HCI_STATE_HALTING; 2525 break; 2526 case HCI_POWER_SLEEP: 2527 // do nothing 2528 break; 2529 } 2530 break; 2531 } 2532 2533 // create internal event 2534 hci_emit_state(); 2535 2536 // trigger next/first action 2537 hci_run(); 2538 2539 return 0; 2540 } 2541 2542 2543 #ifdef ENABLE_CLASSIC 2544 2545 static void hci_update_scan_enable(void){ 2546 // 2 = page scan, 1 = inq scan 2547 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2548 hci_run(); 2549 } 2550 2551 void gap_discoverable_control(uint8_t enable){ 2552 if (enable) enable = 1; // normalize argument 2553 2554 if (hci_stack->discoverable == enable){ 2555 hci_emit_discoverable_enabled(hci_stack->discoverable); 2556 return; 2557 } 2558 2559 hci_stack->discoverable = enable; 2560 hci_update_scan_enable(); 2561 } 2562 2563 void gap_connectable_control(uint8_t enable){ 2564 if (enable) enable = 1; // normalize argument 2565 2566 // don't emit event 2567 if (hci_stack->connectable == enable) return; 2568 2569 hci_stack->connectable = enable; 2570 hci_update_scan_enable(); 2571 } 2572 #endif 2573 2574 void gap_local_bd_addr(bd_addr_t address_buffer){ 2575 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2576 } 2577 2578 static void hci_run(void){ 2579 2580 // log_info("hci_run: entered"); 2581 btstack_linked_item_t * it; 2582 2583 // send continuation fragments first, as they block the prepared packet buffer 2584 if (hci_stack->acl_fragmentation_total_size > 0) { 2585 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2586 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2587 if (connection) { 2588 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2589 hci_send_acl_packet_fragments(connection); 2590 return; 2591 } 2592 } else { 2593 // connection gone -> discard further fragments 2594 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2595 hci_stack->acl_fragmentation_total_size = 0; 2596 hci_stack->acl_fragmentation_pos = 0; 2597 } 2598 } 2599 2600 if (!hci_can_send_command_packet_now()) return; 2601 2602 // global/non-connection oriented commands 2603 2604 #ifdef ENABLE_CLASSIC 2605 // decline incoming connections 2606 if (hci_stack->decline_reason){ 2607 uint8_t reason = hci_stack->decline_reason; 2608 hci_stack->decline_reason = 0; 2609 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2610 return; 2611 } 2612 2613 // send scan enable 2614 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2615 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2616 hci_stack->new_scan_enable_value = 0xff; 2617 return; 2618 } 2619 #endif 2620 2621 #ifdef ENABLE_BLE 2622 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 2623 if ((hci_stack->state == HCI_STATE_WORKING) 2624 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 2625 2626 #ifdef ENABLE_LE_CENTRAL 2627 // handle le scan 2628 switch(hci_stack->le_scanning_state){ 2629 case LE_START_SCAN: 2630 hci_stack->le_scanning_state = LE_SCANNING; 2631 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2632 return; 2633 2634 case LE_STOP_SCAN: 2635 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2636 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2637 return; 2638 default: 2639 break; 2640 } 2641 if (hci_stack->le_scan_type != 0xff){ 2642 // defaults: active scanning, accept all advertisement packets 2643 int scan_type = hci_stack->le_scan_type; 2644 hci_stack->le_scan_type = 0xff; 2645 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); 2646 return; 2647 } 2648 #endif 2649 #ifdef ENABLE_LE_PERIPHERAL 2650 // le advertisement control 2651 if (hci_stack->le_advertisements_todo){ 2652 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2653 } 2654 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2655 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2656 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2657 return; 2658 } 2659 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2660 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2661 hci_send_cmd(&hci_le_set_advertising_parameters, 2662 hci_stack->le_advertisements_interval_min, 2663 hci_stack->le_advertisements_interval_max, 2664 hci_stack->le_advertisements_type, 2665 hci_stack->le_own_addr_type, 2666 hci_stack->le_advertisements_direct_address_type, 2667 hci_stack->le_advertisements_direct_address, 2668 hci_stack->le_advertisements_channel_map, 2669 hci_stack->le_advertisements_filter_policy); 2670 return; 2671 } 2672 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2673 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2674 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, hci_stack->le_advertisements_data); 2675 return; 2676 } 2677 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2678 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2679 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2680 hci_stack->le_scan_response_data); 2681 return; 2682 } 2683 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2684 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2685 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2686 return; 2687 } 2688 #endif 2689 2690 #ifdef ENABLE_LE_CENTRAL 2691 // 2692 // LE Whitelist Management 2693 // 2694 2695 // check if whitelist needs modification 2696 btstack_linked_list_iterator_t lit; 2697 int modification_pending = 0; 2698 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2699 while (btstack_linked_list_iterator_has_next(&lit)){ 2700 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2701 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2702 modification_pending = 1; 2703 break; 2704 } 2705 } 2706 2707 if (modification_pending){ 2708 // stop connnecting if modification pending 2709 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2710 hci_send_cmd(&hci_le_create_connection_cancel); 2711 return; 2712 } 2713 2714 // add/remove entries 2715 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2716 while (btstack_linked_list_iterator_has_next(&lit)){ 2717 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2718 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2719 entry->state = LE_WHITELIST_ON_CONTROLLER; 2720 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2721 return; 2722 2723 } 2724 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2725 bd_addr_t address; 2726 bd_addr_type_t address_type = entry->address_type; 2727 memcpy(address, entry->address, 6); 2728 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2729 btstack_memory_whitelist_entry_free(entry); 2730 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2731 return; 2732 } 2733 } 2734 } 2735 2736 // start connecting 2737 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2738 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2739 bd_addr_t null_addr; 2740 memset(null_addr, 0, 6); 2741 hci_send_cmd(&hci_le_create_connection, 2742 0x0060, // scan interval: 60 ms 2743 0x0030, // scan interval: 30 ms 2744 1, // use whitelist 2745 0, // peer address type 2746 null_addr, // peer bd addr 2747 hci_stack->le_own_addr_type, // our addr type: 2748 0x0008, // conn interval min 2749 0x0018, // conn interval max 2750 0, // conn latency 2751 0x0048, // supervision timeout 2752 0x0001, // min ce length 2753 0x0001 // max ce length 2754 ); 2755 return; 2756 } 2757 #endif 2758 } 2759 #endif 2760 2761 // send pending HCI commands 2762 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2763 hci_connection_t * connection = (hci_connection_t *) it; 2764 2765 switch(connection->state){ 2766 case SEND_CREATE_CONNECTION: 2767 switch(connection->address_type){ 2768 #ifdef ENABLE_CLASSIC 2769 case BD_ADDR_TYPE_CLASSIC: 2770 log_info("sending hci_create_connection"); 2771 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2772 break; 2773 #endif 2774 default: 2775 #ifdef ENABLE_BLE 2776 #ifdef ENABLE_LE_CENTRAL 2777 log_info("sending hci_le_create_connection"); 2778 hci_send_cmd(&hci_le_create_connection, 2779 0x0060, // scan interval: 60 ms 2780 0x0030, // scan interval: 30 ms 2781 0, // don't use whitelist 2782 connection->address_type, // peer address type 2783 connection->address, // peer bd addr 2784 hci_stack->le_own_addr_type, // our addr type: 2785 0x0008, // conn interval min 2786 0x0018, // conn interval max 2787 0, // conn latency 2788 0x0048, // supervision timeout 2789 0x0001, // min ce length 2790 0x0001 // max ce length 2791 ); 2792 2793 connection->state = SENT_CREATE_CONNECTION; 2794 #endif 2795 #endif 2796 break; 2797 } 2798 return; 2799 2800 #ifdef ENABLE_CLASSIC 2801 case RECEIVED_CONNECTION_REQUEST: 2802 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2803 connection->state = ACCEPTED_CONNECTION_REQUEST; 2804 connection->role = HCI_ROLE_SLAVE; 2805 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2806 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2807 } 2808 return; 2809 #endif 2810 2811 #ifdef ENABLE_BLE 2812 #ifdef ENABLE_LE_CENTRAL 2813 case SEND_CANCEL_CONNECTION: 2814 connection->state = SENT_CANCEL_CONNECTION; 2815 hci_send_cmd(&hci_le_create_connection_cancel); 2816 return; 2817 #endif 2818 #endif 2819 case SEND_DISCONNECT: 2820 connection->state = SENT_DISCONNECT; 2821 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2822 return; 2823 2824 default: 2825 break; 2826 } 2827 2828 #ifdef ENABLE_CLASSIC 2829 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2830 log_info("responding to link key request"); 2831 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2832 link_key_t link_key; 2833 link_key_type_t link_key_type; 2834 if ( hci_stack->link_key_db 2835 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 2836 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2837 connection->link_key_type = link_key_type; 2838 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2839 } else { 2840 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2841 } 2842 return; 2843 } 2844 2845 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2846 log_info("denying to pin request"); 2847 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2848 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2849 return; 2850 } 2851 2852 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2853 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2854 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2855 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2856 // tweak authentication requirements 2857 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2858 if (connection->bonding_flags & BONDING_DEDICATED){ 2859 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2860 } 2861 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2862 authreq |= 1; 2863 } 2864 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2865 } else { 2866 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2867 } 2868 return; 2869 } 2870 2871 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2872 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2873 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2874 return; 2875 } 2876 2877 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2878 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2879 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2880 return; 2881 } 2882 2883 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2884 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2885 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2886 return; 2887 } 2888 2889 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2890 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2891 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2892 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2893 return; 2894 } 2895 2896 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2897 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2898 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2899 return; 2900 } 2901 2902 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2903 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2904 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2905 return; 2906 } 2907 #endif 2908 2909 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2910 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2911 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2912 return; 2913 } 2914 2915 #ifdef ENABLE_BLE 2916 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2917 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2918 2919 uint16_t connection_interval_min = connection->le_conn_interval_min; 2920 connection->le_conn_interval_min = 0; 2921 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2922 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2923 0x0000, 0xffff); 2924 } 2925 #endif 2926 } 2927 2928 hci_connection_t * connection; 2929 switch (hci_stack->state){ 2930 case HCI_STATE_INITIALIZING: 2931 hci_initializing_run(); 2932 break; 2933 2934 case HCI_STATE_HALTING: 2935 2936 log_info("HCI_STATE_HALTING"); 2937 2938 // free whitelist entries 2939 #ifdef ENABLE_BLE 2940 #ifdef ENABLE_LE_CENTRAL 2941 { 2942 btstack_linked_list_iterator_t lit; 2943 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2944 while (btstack_linked_list_iterator_has_next(&lit)){ 2945 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2946 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2947 btstack_memory_whitelist_entry_free(entry); 2948 } 2949 } 2950 #endif 2951 #endif 2952 // close all open connections 2953 connection = (hci_connection_t *) hci_stack->connections; 2954 if (connection){ 2955 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 2956 if (!hci_can_send_command_packet_now()) return; 2957 2958 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2959 2960 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2961 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2962 2963 // ... which would be ignored anyway as we shutdown (free) the connection now 2964 hci_shutdown_connection(connection); 2965 2966 // finally, send the disconnect command 2967 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2968 return; 2969 } 2970 log_info("HCI_STATE_HALTING, calling off"); 2971 2972 // switch mode 2973 hci_power_control_off(); 2974 2975 log_info("HCI_STATE_HALTING, emitting state"); 2976 hci_emit_state(); 2977 log_info("HCI_STATE_HALTING, done"); 2978 break; 2979 2980 case HCI_STATE_FALLING_ASLEEP: 2981 switch(hci_stack->substate) { 2982 case HCI_FALLING_ASLEEP_DISCONNECT: 2983 log_info("HCI_STATE_FALLING_ASLEEP"); 2984 // close all open connections 2985 connection = (hci_connection_t *) hci_stack->connections; 2986 2987 #ifdef HAVE_PLATFORM_IPHONE_OS 2988 // don't close connections, if H4 supports power management 2989 if (btstack_control_iphone_power_management_enabled()){ 2990 connection = NULL; 2991 } 2992 #endif 2993 if (connection){ 2994 2995 // send disconnect 2996 if (!hci_can_send_command_packet_now()) return; 2997 2998 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2999 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3000 3001 // send disconnected event right away - causes higher layer connections to get closed, too. 3002 hci_shutdown_connection(connection); 3003 return; 3004 } 3005 3006 if (hci_classic_supported()){ 3007 // disable page and inquiry scan 3008 if (!hci_can_send_command_packet_now()) return; 3009 3010 log_info("HCI_STATE_HALTING, disabling inq scans"); 3011 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3012 3013 // continue in next sub state 3014 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3015 break; 3016 } 3017 // no break - fall through for ble-only chips 3018 3019 case HCI_FALLING_ASLEEP_COMPLETE: 3020 log_info("HCI_STATE_HALTING, calling sleep"); 3021 #ifdef HAVE_PLATFORM_IPHONE_OS 3022 // don't actually go to sleep, if H4 supports power management 3023 if (btstack_control_iphone_power_management_enabled()){ 3024 // SLEEP MODE reached 3025 hci_stack->state = HCI_STATE_SLEEPING; 3026 hci_emit_state(); 3027 break; 3028 } 3029 #endif 3030 // switch mode 3031 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3032 hci_emit_state(); 3033 break; 3034 3035 default: 3036 break; 3037 } 3038 break; 3039 3040 default: 3041 break; 3042 } 3043 } 3044 3045 int hci_send_cmd_packet(uint8_t *packet, int size){ 3046 // house-keeping 3047 3048 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3049 hci_stack->loopback_mode = packet[3]; 3050 } 3051 3052 #ifdef ENABLE_CLASSIC 3053 bd_addr_t addr; 3054 hci_connection_t * conn; 3055 3056 // create_connection? 3057 if (IS_COMMAND(packet, hci_create_connection)){ 3058 reverse_bd_addr(&packet[3], addr); 3059 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3060 3061 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3062 if (!conn){ 3063 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3064 if (!conn){ 3065 // notify client that alloc failed 3066 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3067 return 0; // don't sent packet to controller 3068 } 3069 conn->state = SEND_CREATE_CONNECTION; 3070 } 3071 log_info("conn state %u", conn->state); 3072 switch (conn->state){ 3073 // if connection active exists 3074 case OPEN: 3075 // and OPEN, emit connection complete command, don't send to controller 3076 hci_emit_connection_complete(addr, conn->con_handle, 0); 3077 return 0; 3078 case SEND_CREATE_CONNECTION: 3079 // connection created by hci, e.g. dedicated bonding 3080 break; 3081 default: 3082 // otherwise, just ignore as it is already in the open process 3083 return 0; 3084 } 3085 conn->state = SENT_CREATE_CONNECTION; 3086 } 3087 3088 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3089 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3090 } 3091 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3092 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3093 } 3094 3095 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3096 if (hci_stack->link_key_db){ 3097 reverse_bd_addr(&packet[3], addr); 3098 hci_stack->link_key_db->delete_link_key(addr); 3099 } 3100 } 3101 3102 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3103 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3104 reverse_bd_addr(&packet[3], addr); 3105 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3106 if (conn){ 3107 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3108 } 3109 } 3110 3111 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3112 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3113 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3114 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3115 reverse_bd_addr(&packet[3], addr); 3116 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3117 if (conn){ 3118 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3119 } 3120 } 3121 3122 #ifdef ENABLE_SCO_OVER_HCI 3123 // setup_synchronous_connection? Voice setting at offset 22 3124 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3125 // TODO: compare to current setting if sco connection already active 3126 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3127 } 3128 // accept_synchronus_connection? Voice setting at offset 18 3129 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3130 // TODO: compare to current setting if sco connection already active 3131 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3132 } 3133 #endif 3134 #endif 3135 3136 #ifdef ENABLE_BLE 3137 #ifdef ENABLE_LE_PERIPHERAL 3138 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3139 hci_stack->le_random_address_set = 1; 3140 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3141 } 3142 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3143 hci_stack->le_advertisements_active = packet[3]; 3144 } 3145 #endif 3146 #ifdef ENABLE_LE_CENTRAL 3147 if (IS_COMMAND(packet, hci_le_create_connection)){ 3148 // white list used? 3149 uint8_t initiator_filter_policy = packet[7]; 3150 switch (initiator_filter_policy){ 3151 case 0: 3152 // whitelist not used 3153 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3154 break; 3155 case 1: 3156 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3157 break; 3158 default: 3159 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3160 break; 3161 } 3162 } 3163 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3164 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3165 } 3166 #endif 3167 #endif 3168 3169 hci_stack->num_cmd_packets--; 3170 3171 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3172 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3173 3174 // release packet buffer for synchronous transport implementations 3175 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3176 hci_stack->hci_packet_buffer_reserved = 0; 3177 } 3178 3179 return err; 3180 } 3181 3182 // disconnect because of security block 3183 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3184 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3185 if (!connection) return; 3186 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3187 } 3188 3189 3190 // Configure Secure Simple Pairing 3191 3192 #ifdef ENABLE_CLASSIC 3193 3194 // enable will enable SSP during init 3195 void gap_ssp_set_enable(int enable){ 3196 hci_stack->ssp_enable = enable; 3197 } 3198 3199 static int hci_local_ssp_activated(void){ 3200 return gap_ssp_supported() && hci_stack->ssp_enable; 3201 } 3202 3203 // if set, BTstack will respond to io capability request using authentication requirement 3204 void gap_ssp_set_io_capability(int io_capability){ 3205 hci_stack->ssp_io_capability = io_capability; 3206 } 3207 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3208 hci_stack->ssp_authentication_requirement = authentication_requirement; 3209 } 3210 3211 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3212 void gap_ssp_set_auto_accept(int auto_accept){ 3213 hci_stack->ssp_auto_accept = auto_accept; 3214 } 3215 #endif 3216 3217 // va_list part of hci_send_cmd 3218 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3219 if (!hci_can_send_command_packet_now()){ 3220 log_error("hci_send_cmd called but cannot send packet now"); 3221 return 0; 3222 } 3223 3224 // for HCI INITIALIZATION 3225 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3226 hci_stack->last_cmd_opcode = cmd->opcode; 3227 3228 hci_reserve_packet_buffer(); 3229 uint8_t * packet = hci_stack->hci_packet_buffer; 3230 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3231 return hci_send_cmd_packet(packet, size); 3232 } 3233 3234 /** 3235 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3236 */ 3237 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3238 va_list argptr; 3239 va_start(argptr, cmd); 3240 int res = hci_send_cmd_va_arg(cmd, argptr); 3241 va_end(argptr); 3242 return res; 3243 } 3244 3245 // Create various non-HCI events. 3246 // TODO: generalize, use table similar to hci_create_command 3247 3248 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3249 // dump packet 3250 if (dump) { 3251 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3252 } 3253 3254 // dispatch to all event handlers 3255 btstack_linked_list_iterator_t it; 3256 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3257 while (btstack_linked_list_iterator_has_next(&it)){ 3258 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3259 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3260 } 3261 } 3262 3263 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3264 if (!hci_stack->acl_packet_handler) return; 3265 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3266 } 3267 3268 #ifdef ENABLE_CLASSIC 3269 static void hci_notify_if_sco_can_send_now(void){ 3270 // notify SCO sender if waiting 3271 if (!hci_stack->sco_waiting_for_can_send_now) return; 3272 if (hci_can_send_sco_packet_now()){ 3273 hci_stack->sco_waiting_for_can_send_now = 0; 3274 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3275 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3276 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3277 } 3278 } 3279 #endif 3280 3281 void hci_emit_state(void){ 3282 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3283 uint8_t event[3]; 3284 event[0] = BTSTACK_EVENT_STATE; 3285 event[1] = sizeof(event) - 2; 3286 event[2] = hci_stack->state; 3287 hci_emit_event(event, sizeof(event), 1); 3288 } 3289 3290 #ifdef ENABLE_CLASSIC 3291 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3292 uint8_t event[13]; 3293 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3294 event[1] = sizeof(event) - 2; 3295 event[2] = status; 3296 little_endian_store_16(event, 3, con_handle); 3297 reverse_bd_addr(address, &event[5]); 3298 event[11] = 1; // ACL connection 3299 event[12] = 0; // encryption disabled 3300 hci_emit_event(event, sizeof(event), 1); 3301 } 3302 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3303 if (disable_l2cap_timeouts) return; 3304 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3305 uint8_t event[4]; 3306 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3307 event[1] = sizeof(event) - 2; 3308 little_endian_store_16(event, 2, conn->con_handle); 3309 hci_emit_event(event, sizeof(event), 1); 3310 } 3311 #endif 3312 3313 #ifdef ENABLE_BLE 3314 #ifdef ENABLE_LE_CENTRAL 3315 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3316 uint8_t event[21]; 3317 event[0] = HCI_EVENT_LE_META; 3318 event[1] = sizeof(event) - 2; 3319 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3320 event[3] = status; 3321 little_endian_store_16(event, 4, con_handle); 3322 event[6] = 0; // TODO: role 3323 event[7] = address_type; 3324 reverse_bd_addr(address, &event[8]); 3325 little_endian_store_16(event, 14, 0); // interval 3326 little_endian_store_16(event, 16, 0); // latency 3327 little_endian_store_16(event, 18, 0); // supervision timeout 3328 event[20] = 0; // master clock accuracy 3329 hci_emit_event(event, sizeof(event), 1); 3330 } 3331 #endif 3332 #endif 3333 3334 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3335 uint8_t event[6]; 3336 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3337 event[1] = sizeof(event) - 2; 3338 event[2] = 0; // status = OK 3339 little_endian_store_16(event, 3, con_handle); 3340 event[5] = reason; 3341 hci_emit_event(event, sizeof(event), 1); 3342 } 3343 3344 static void hci_emit_nr_connections_changed(void){ 3345 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3346 uint8_t event[3]; 3347 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3348 event[1] = sizeof(event) - 2; 3349 event[2] = nr_hci_connections(); 3350 hci_emit_event(event, sizeof(event), 1); 3351 } 3352 3353 static void hci_emit_hci_open_failed(void){ 3354 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3355 uint8_t event[2]; 3356 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3357 event[1] = sizeof(event) - 2; 3358 hci_emit_event(event, sizeof(event), 1); 3359 } 3360 3361 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3362 log_info("hci_emit_dedicated_bonding_result %u ", status); 3363 uint8_t event[9]; 3364 int pos = 0; 3365 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3366 event[pos++] = sizeof(event) - 2; 3367 event[pos++] = status; 3368 reverse_bd_addr(address, &event[pos]); 3369 hci_emit_event(event, sizeof(event), 1); 3370 } 3371 3372 3373 #ifdef ENABLE_CLASSIC 3374 3375 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3376 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3377 uint8_t event[5]; 3378 int pos = 0; 3379 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3380 event[pos++] = sizeof(event) - 2; 3381 little_endian_store_16(event, 2, con_handle); 3382 pos += 2; 3383 event[pos++] = level; 3384 hci_emit_event(event, sizeof(event), 1); 3385 } 3386 3387 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3388 if (!connection) return LEVEL_0; 3389 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3390 return gap_security_level_for_link_key_type(connection->link_key_type); 3391 } 3392 3393 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3394 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3395 uint8_t event[3]; 3396 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3397 event[1] = sizeof(event) - 2; 3398 event[2] = enabled; 3399 hci_emit_event(event, sizeof(event), 1); 3400 } 3401 3402 #ifdef ENABLE_CLASSIC 3403 // query if remote side supports eSCO 3404 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3405 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3406 if (!connection) return 0; 3407 return connection->remote_supported_feature_eSCO; 3408 } 3409 3410 // query if remote side supports SSP 3411 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3412 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3413 if (!connection) return 0; 3414 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3415 } 3416 3417 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3418 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3419 } 3420 #endif 3421 3422 // GAP API 3423 /** 3424 * @bbrief enable/disable bonding. default is enabled 3425 * @praram enabled 3426 */ 3427 void gap_set_bondable_mode(int enable){ 3428 hci_stack->bondable = enable ? 1 : 0; 3429 } 3430 /** 3431 * @brief Get bondable mode. 3432 * @return 1 if bondable 3433 */ 3434 int gap_get_bondable_mode(void){ 3435 return hci_stack->bondable; 3436 } 3437 3438 /** 3439 * @brief map link keys to security levels 3440 */ 3441 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3442 switch (link_key_type){ 3443 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3444 return LEVEL_4; 3445 case COMBINATION_KEY: 3446 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3447 return LEVEL_3; 3448 default: 3449 return LEVEL_2; 3450 } 3451 } 3452 3453 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3454 log_info("gap_mitm_protection_required_for_security_level %u", level); 3455 return level > LEVEL_2; 3456 } 3457 3458 /** 3459 * @brief get current security level 3460 */ 3461 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3462 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3463 if (!connection) return LEVEL_0; 3464 return gap_security_level_for_connection(connection); 3465 } 3466 3467 /** 3468 * @brief request connection to device to 3469 * @result GAP_AUTHENTICATION_RESULT 3470 */ 3471 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3472 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3473 if (!connection){ 3474 hci_emit_security_level(con_handle, LEVEL_0); 3475 return; 3476 } 3477 gap_security_level_t current_level = gap_security_level(con_handle); 3478 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3479 if (current_level >= requested_level){ 3480 hci_emit_security_level(con_handle, current_level); 3481 return; 3482 } 3483 3484 connection->requested_security_level = requested_level; 3485 3486 #if 0 3487 // sending encryption request without a link key results in an error. 3488 // TODO: figure out how to use it properly 3489 3490 // would enabling ecnryption suffice (>= LEVEL_2)? 3491 if (hci_stack->link_key_db){ 3492 link_key_type_t link_key_type; 3493 link_key_t link_key; 3494 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3495 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3496 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3497 return; 3498 } 3499 } 3500 } 3501 #endif 3502 3503 // try to authenticate connection 3504 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3505 hci_run(); 3506 } 3507 3508 /** 3509 * @brief start dedicated bonding with device. disconnect after bonding 3510 * @param device 3511 * @param request MITM protection 3512 * @result GAP_DEDICATED_BONDING_COMPLETE 3513 */ 3514 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3515 3516 // create connection state machine 3517 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3518 3519 if (!connection){ 3520 return BTSTACK_MEMORY_ALLOC_FAILED; 3521 } 3522 3523 // delete linkn key 3524 gap_drop_link_key_for_bd_addr(device); 3525 3526 // configure LEVEL_2/3, dedicated bonding 3527 connection->state = SEND_CREATE_CONNECTION; 3528 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3529 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3530 connection->bonding_flags = BONDING_DEDICATED; 3531 3532 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3533 3534 // handle: connnection failure (connection complete != ok) 3535 // handle: authentication failure 3536 // handle: disconnect on done 3537 3538 hci_run(); 3539 3540 return 0; 3541 } 3542 #endif 3543 3544 void gap_set_local_name(const char * local_name){ 3545 hci_stack->local_name = local_name; 3546 } 3547 3548 3549 #ifdef ENABLE_BLE 3550 3551 #ifdef ENABLE_LE_CENTRAL 3552 void gap_start_scan(void){ 3553 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3554 hci_stack->le_scanning_state = LE_START_SCAN; 3555 hci_run(); 3556 } 3557 3558 void gap_stop_scan(void){ 3559 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3560 hci_stack->le_scanning_state = LE_STOP_SCAN; 3561 hci_run(); 3562 } 3563 3564 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3565 hci_stack->le_scan_type = scan_type; 3566 hci_stack->le_scan_interval = scan_interval; 3567 hci_stack->le_scan_window = scan_window; 3568 hci_run(); 3569 } 3570 3571 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3572 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3573 if (!conn){ 3574 log_info("gap_connect: no connection exists yet, creating context"); 3575 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3576 if (!conn){ 3577 // notify client that alloc failed 3578 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3579 log_info("gap_connect: failed to alloc hci_connection_t"); 3580 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3581 } 3582 conn->state = SEND_CREATE_CONNECTION; 3583 log_info("gap_connect: send create connection next"); 3584 hci_run(); 3585 return 0; 3586 } 3587 3588 if (!hci_is_le_connection(conn) || 3589 conn->state == SEND_CREATE_CONNECTION || 3590 conn->state == SENT_CREATE_CONNECTION) { 3591 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3592 log_error("gap_connect: classic connection or connect is already being created"); 3593 return GATT_CLIENT_IN_WRONG_STATE; 3594 } 3595 3596 log_info("gap_connect: context exists with state %u", conn->state); 3597 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3598 hci_run(); 3599 return 0; 3600 } 3601 3602 // @assumption: only a single outgoing LE Connection exists 3603 static hci_connection_t * gap_get_outgoing_connection(void){ 3604 btstack_linked_item_t *it; 3605 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3606 hci_connection_t * conn = (hci_connection_t *) it; 3607 if (!hci_is_le_connection(conn)) continue; 3608 switch (conn->state){ 3609 case SEND_CREATE_CONNECTION: 3610 case SENT_CREATE_CONNECTION: 3611 return conn; 3612 default: 3613 break; 3614 }; 3615 } 3616 return NULL; 3617 } 3618 3619 uint8_t gap_connect_cancel(void){ 3620 hci_connection_t * conn = gap_get_outgoing_connection(); 3621 if (!conn) return 0; 3622 switch (conn->state){ 3623 case SEND_CREATE_CONNECTION: 3624 // skip sending create connection and emit event instead 3625 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3626 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3627 btstack_memory_hci_connection_free( conn ); 3628 break; 3629 case SENT_CREATE_CONNECTION: 3630 // request to send cancel connection 3631 conn->state = SEND_CANCEL_CONNECTION; 3632 hci_run(); 3633 break; 3634 default: 3635 break; 3636 } 3637 return 0; 3638 } 3639 #endif 3640 3641 /** 3642 * @brief Updates the connection parameters for a given LE connection 3643 * @param handle 3644 * @param conn_interval_min (unit: 1.25ms) 3645 * @param conn_interval_max (unit: 1.25ms) 3646 * @param conn_latency 3647 * @param supervision_timeout (unit: 10ms) 3648 * @returns 0 if ok 3649 */ 3650 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3651 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3652 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3653 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3654 connection->le_conn_interval_min = conn_interval_min; 3655 connection->le_conn_interval_max = conn_interval_max; 3656 connection->le_conn_latency = conn_latency; 3657 connection->le_supervision_timeout = supervision_timeout; 3658 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3659 hci_run(); 3660 return 0; 3661 } 3662 3663 /** 3664 * @brief Request an update of the connection parameter for a given LE connection 3665 * @param handle 3666 * @param conn_interval_min (unit: 1.25ms) 3667 * @param conn_interval_max (unit: 1.25ms) 3668 * @param conn_latency 3669 * @param supervision_timeout (unit: 10ms) 3670 * @returns 0 if ok 3671 */ 3672 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3673 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3674 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3675 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3676 connection->le_conn_interval_min = conn_interval_min; 3677 connection->le_conn_interval_max = conn_interval_max; 3678 connection->le_conn_latency = conn_latency; 3679 connection->le_supervision_timeout = supervision_timeout; 3680 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3681 hci_run(); 3682 return 0; 3683 } 3684 3685 #ifdef ENABLE_LE_PERIPHERAL 3686 3687 static void gap_advertisments_changed(void){ 3688 // disable advertisements before updating adv, scan data, or adv params 3689 if (hci_stack->le_advertisements_active){ 3690 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3691 } 3692 hci_run(); 3693 } 3694 3695 /** 3696 * @brief Set Advertisement Data 3697 * @param advertising_data_length 3698 * @param advertising_data (max 31 octets) 3699 * @note data is not copied, pointer has to stay valid 3700 */ 3701 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3702 hci_stack->le_advertisements_data_len = advertising_data_length; 3703 hci_stack->le_advertisements_data = advertising_data; 3704 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3705 gap_advertisments_changed(); 3706 } 3707 3708 /** 3709 * @brief Set Scan Response Data 3710 * @param advertising_data_length 3711 * @param advertising_data (max 31 octets) 3712 * @note data is not copied, pointer has to stay valid 3713 */ 3714 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3715 hci_stack->le_scan_response_data_len = scan_response_data_length; 3716 hci_stack->le_scan_response_data = scan_response_data; 3717 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3718 gap_advertisments_changed(); 3719 } 3720 3721 /** 3722 * @brief Set Advertisement Parameters 3723 * @param adv_int_min 3724 * @param adv_int_max 3725 * @param adv_type 3726 * @param direct_address_type 3727 * @param direct_address 3728 * @param channel_map 3729 * @param filter_policy 3730 * 3731 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3732 */ 3733 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3734 uint8_t direct_address_typ, bd_addr_t direct_address, 3735 uint8_t channel_map, uint8_t filter_policy) { 3736 3737 hci_stack->le_advertisements_interval_min = adv_int_min; 3738 hci_stack->le_advertisements_interval_max = adv_int_max; 3739 hci_stack->le_advertisements_type = adv_type; 3740 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3741 hci_stack->le_advertisements_channel_map = channel_map; 3742 hci_stack->le_advertisements_filter_policy = filter_policy; 3743 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3744 3745 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3746 gap_advertisments_changed(); 3747 } 3748 3749 /** 3750 * @brief Enable/Disable Advertisements 3751 * @param enabled 3752 */ 3753 void gap_advertisements_enable(int enabled){ 3754 hci_stack->le_advertisements_enabled = enabled; 3755 if (enabled && !hci_stack->le_advertisements_active){ 3756 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3757 } 3758 if (!enabled && hci_stack->le_advertisements_active){ 3759 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3760 } 3761 hci_run(); 3762 } 3763 3764 #endif 3765 3766 void hci_le_set_own_address_type(uint8_t own_address_type){ 3767 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 3768 if (own_address_type == hci_stack->le_own_addr_type) return; 3769 hci_stack->le_own_addr_type = own_address_type; 3770 3771 #ifdef ENABLE_LE_PERIPHERAL 3772 // update advertisement parameters, too 3773 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3774 gap_advertisments_changed(); 3775 #endif 3776 #ifdef ENABLE_LE_CENTRAL 3777 // note: we don't update scan parameters or modify ongoing connection attempts 3778 #endif 3779 } 3780 3781 #endif 3782 3783 uint8_t gap_disconnect(hci_con_handle_t handle){ 3784 hci_connection_t * conn = hci_connection_for_handle(handle); 3785 if (!conn){ 3786 hci_emit_disconnection_complete(handle, 0); 3787 return 0; 3788 } 3789 conn->state = SEND_DISCONNECT; 3790 hci_run(); 3791 return 0; 3792 } 3793 3794 /** 3795 * @brief Get connection type 3796 * @param con_handle 3797 * @result connection_type 3798 */ 3799 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3800 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3801 if (!conn) return GAP_CONNECTION_INVALID; 3802 switch (conn->address_type){ 3803 case BD_ADDR_TYPE_LE_PUBLIC: 3804 case BD_ADDR_TYPE_LE_RANDOM: 3805 return GAP_CONNECTION_LE; 3806 case BD_ADDR_TYPE_SCO: 3807 return GAP_CONNECTION_SCO; 3808 case BD_ADDR_TYPE_CLASSIC: 3809 return GAP_CONNECTION_ACL; 3810 default: 3811 return GAP_CONNECTION_INVALID; 3812 } 3813 } 3814 3815 #ifdef ENABLE_BLE 3816 3817 #ifdef ENABLE_LE_CENTRAL 3818 /** 3819 * @brief Auto Connection Establishment - Start Connecting to device 3820 * @param address_typ 3821 * @param address 3822 * @returns 0 if ok 3823 */ 3824 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3825 // check capacity 3826 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 3827 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3828 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3829 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3830 entry->address_type = address_type; 3831 memcpy(entry->address, address, 6); 3832 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3833 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 3834 hci_run(); 3835 return 0; 3836 } 3837 3838 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3839 btstack_linked_list_iterator_t it; 3840 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3841 while (btstack_linked_list_iterator_has_next(&it)){ 3842 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3843 if (entry->address_type != address_type) continue; 3844 if (memcmp(entry->address, address, 6) != 0) continue; 3845 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3846 // remove from controller if already present 3847 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3848 continue; 3849 } 3850 // direclty remove entry from whitelist 3851 btstack_linked_list_iterator_remove(&it); 3852 btstack_memory_whitelist_entry_free(entry); 3853 } 3854 } 3855 3856 /** 3857 * @brief Auto Connection Establishment - Stop Connecting to device 3858 * @param address_typ 3859 * @param address 3860 * @returns 0 if ok 3861 */ 3862 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3863 hci_remove_from_whitelist(address_type, address); 3864 hci_run(); 3865 return 0; 3866 } 3867 3868 /** 3869 * @brief Auto Connection Establishment - Stop everything 3870 * @note Convenience function to stop all active auto connection attempts 3871 */ 3872 void gap_auto_connection_stop_all(void){ 3873 btstack_linked_list_iterator_t it; 3874 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3875 while (btstack_linked_list_iterator_has_next(&it)){ 3876 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3877 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3878 // remove from controller if already present 3879 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3880 continue; 3881 } 3882 // directly remove entry from whitelist 3883 btstack_linked_list_iterator_remove(&it); 3884 btstack_memory_whitelist_entry_free(entry); 3885 } 3886 hci_run(); 3887 } 3888 #endif 3889 #endif 3890 3891 #ifdef ENABLE_CLASSIC 3892 /** 3893 * @brief Set Extended Inquiry Response data 3894 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 3895 * @note has to be done before stack starts up 3896 */ 3897 void gap_set_extended_inquiry_response(const uint8_t * data){ 3898 hci_stack->eir_data = data; 3899 } 3900 3901 /** 3902 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 3903 * @param inquriy_mode see bluetooth_defines.h 3904 */ 3905 void hci_set_inquiry_mode(inquiry_mode_t mode){ 3906 hci_stack->inquiry_mode = mode; 3907 } 3908 3909 /** 3910 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3911 */ 3912 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3913 hci_stack->sco_voice_setting = voice_setting; 3914 } 3915 3916 /** 3917 * @brief Get SCO Voice Setting 3918 * @return current voice setting 3919 */ 3920 uint16_t hci_get_sco_voice_setting(void){ 3921 return hci_stack->sco_voice_setting; 3922 } 3923 3924 /** @brief Get SCO packet length for current SCO Voice setting 3925 * @note Using SCO packets of the exact length is required for USB transfer 3926 * @return Length of SCO packets in bytes (not audio frames) 3927 */ 3928 int hci_get_sco_packet_length(void){ 3929 // see Core Spec for H2 USB Transfer. 3930 if (hci_stack->sco_voice_setting & 0x0020) return 51; 3931 return 27; 3932 } 3933 #endif 3934 3935 /** 3936 * @brief Set callback for Bluetooth Hardware Error 3937 */ 3938 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 3939 hci_stack->hardware_error_callback = fn; 3940 } 3941 3942 void hci_disconnect_all(void){ 3943 btstack_linked_list_iterator_t it; 3944 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 3945 while (btstack_linked_list_iterator_has_next(&it)){ 3946 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 3947 if (con->state == SENT_DISCONNECT) continue; 3948 con->state = SEND_DISCONNECT; 3949 } 3950 hci_run(); 3951 } 3952 3953 uint16_t hci_get_manufacturer(void){ 3954 return hci_stack->manufacturer; 3955 } 3956