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 if (hci_le_supported()){ 1436 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1437 return; 1438 } else { 1439 log_error("Neither BR/EDR nor LE supported"); 1440 hci_init_done(); 1441 return; 1442 } 1443 } 1444 if (!gap_ssp_supported()){ 1445 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1446 return; 1447 } 1448 break; 1449 #ifdef ENABLE_BLE 1450 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1451 // skip write le host if not supported (e.g. on LE only EM9301) 1452 if (hci_stack->local_supported_commands[0] & 0x02) break; 1453 #ifdef ENABLE_LE_CENTRAL 1454 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1455 #else 1456 hci_init_done(); 1457 #endif 1458 return; 1459 #endif 1460 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1461 // skip write eir data if no eir data set 1462 if (hci_stack->eir_data) break; 1463 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1464 return; 1465 1466 #ifdef ENABLE_SCO_OVER_HCI 1467 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1468 // skip write synchronous flow control if not supported 1469 if (hci_stack->local_supported_commands[0] & 0x04) break; 1470 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1471 // explicit fall through to reduce repetitions 1472 1473 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1474 // skip write default erroneous data reporting if not supported 1475 if (hci_stack->local_supported_commands[0] & 0x08) break; 1476 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1477 // explicit fall through to reduce repetitions 1478 1479 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1480 // skip bcm set sco pcm config on non-Broadcom chipsets 1481 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION) break; 1482 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1483 // explicit fall through to reduce repetitions 1484 1485 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1486 if (!hci_le_supported()){ 1487 // SKIP LE init for Classic only configuration 1488 hci_init_done(); 1489 return; 1490 } 1491 break; 1492 #else 1493 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1494 if (!hci_le_supported()){ 1495 // SKIP LE init for Classic only configuration 1496 hci_init_done(); 1497 return; 1498 } 1499 #endif 1500 break; 1501 // Response to command before init done state -> init done 1502 case (HCI_INIT_DONE-1): 1503 hci_init_done(); 1504 return; 1505 1506 default: 1507 break; 1508 } 1509 hci_initializing_next_state(); 1510 } 1511 1512 static void event_handler(uint8_t *packet, int size){ 1513 1514 uint16_t event_length = packet[1]; 1515 1516 // assert packet is complete 1517 if (size != event_length + 2){ 1518 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1519 return; 1520 } 1521 1522 bd_addr_t addr; 1523 bd_addr_type_t addr_type; 1524 uint8_t link_type; 1525 hci_con_handle_t handle; 1526 hci_connection_t * conn; 1527 int i; 1528 1529 // warnings 1530 (void) link_type; 1531 1532 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1533 1534 switch (hci_event_packet_get_type(packet)) { 1535 1536 case HCI_EVENT_COMMAND_COMPLETE: 1537 // get num cmd packets - limit to 1 to reduce complexity 1538 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1539 1540 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1541 if (packet[5]) break; 1542 // terminate, name 248 chars 1543 packet[6+248] = 0; 1544 log_info("local name: %s", &packet[6]); 1545 } 1546 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1547 // from offset 5 1548 // status 1549 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1550 hci_stack->acl_data_packet_length = little_endian_read_16(packet, 6); 1551 hci_stack->sco_data_packet_length = packet[8]; 1552 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1553 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1554 1555 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1556 // determine usable ACL payload size 1557 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1558 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1559 } 1560 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1561 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1562 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1563 } 1564 } 1565 #ifdef ENABLE_BLE 1566 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1567 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1568 hci_stack->le_acl_packets_total_num = packet[8]; 1569 // determine usable ACL payload size 1570 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1571 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1572 } 1573 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1574 } 1575 #ifdef ENABLE_LE_CENTRAL 1576 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1577 hci_stack->le_whitelist_capacity = packet[6]; 1578 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1579 } 1580 #endif 1581 #endif 1582 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1583 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1584 hci_stack->local_bd_addr); 1585 log_info("Local Address, Status: 0x%02x: Addr: %s", 1586 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1587 #ifdef ENABLE_CLASSIC 1588 if (hci_stack->link_key_db){ 1589 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1590 } 1591 #endif 1592 } 1593 #ifdef ENABLE_CLASSIC 1594 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1595 hci_emit_discoverable_enabled(hci_stack->discoverable); 1596 } 1597 #endif 1598 1599 // Note: HCI init checks 1600 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1601 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1602 1603 #ifdef ENABLE_CLASSIC 1604 // determine usable ACL packet types based on host buffer size and supported features 1605 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1606 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1607 #endif 1608 // Classic/LE 1609 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1610 } 1611 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1612 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1613 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1614 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1615 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1616 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1617 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1618 } 1619 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1620 hci_stack->local_supported_commands[0] = 1621 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1622 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1623 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1624 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08); // bit 3 = Octet 18, bit 3 1625 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1626 } 1627 #ifdef ENABLE_CLASSIC 1628 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1629 if (packet[5] == 0){ 1630 hci_stack->synchronous_flow_control_enabled = 1; 1631 } 1632 } 1633 #endif 1634 break; 1635 1636 case HCI_EVENT_COMMAND_STATUS: 1637 // get num cmd packets - limit to 1 to reduce complexity 1638 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1639 break; 1640 1641 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1642 int offset = 3; 1643 for (i=0; i<packet[2];i++){ 1644 handle = little_endian_read_16(packet, offset); 1645 offset += 2; 1646 uint16_t num_packets = little_endian_read_16(packet, offset); 1647 offset += 2; 1648 1649 conn = hci_connection_for_handle(handle); 1650 if (!conn){ 1651 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1652 continue; 1653 } 1654 1655 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1656 #ifdef ENABLE_CLASSIC 1657 if (conn->num_sco_packets_sent >= num_packets){ 1658 conn->num_sco_packets_sent -= num_packets; 1659 } else { 1660 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1661 conn->num_sco_packets_sent = 0; 1662 } 1663 hci_notify_if_sco_can_send_now(); 1664 #endif 1665 } else { 1666 if (conn->num_acl_packets_sent >= num_packets){ 1667 conn->num_acl_packets_sent -= num_packets; 1668 } else { 1669 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1670 conn->num_acl_packets_sent = 0; 1671 } 1672 } 1673 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1674 } 1675 break; 1676 } 1677 1678 #ifdef ENABLE_CLASSIC 1679 case HCI_EVENT_CONNECTION_REQUEST: 1680 reverse_bd_addr(&packet[2], addr); 1681 // TODO: eval COD 8-10 1682 link_type = packet[11]; 1683 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1684 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1685 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1686 if (!conn) { 1687 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1688 } 1689 if (!conn) { 1690 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1691 hci_stack->decline_reason = 0x0d; 1692 bd_addr_copy(hci_stack->decline_addr, addr); 1693 break; 1694 } 1695 conn->role = HCI_ROLE_SLAVE; 1696 conn->state = RECEIVED_CONNECTION_REQUEST; 1697 // store info about eSCO 1698 if (link_type == 0x02){ 1699 conn->remote_supported_feature_eSCO = 1; 1700 } 1701 hci_run(); 1702 break; 1703 1704 case HCI_EVENT_CONNECTION_COMPLETE: 1705 // Connection management 1706 reverse_bd_addr(&packet[5], addr); 1707 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1708 addr_type = BD_ADDR_TYPE_CLASSIC; 1709 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1710 if (conn) { 1711 if (!packet[2]){ 1712 conn->state = OPEN; 1713 conn->con_handle = little_endian_read_16(packet, 3); 1714 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1715 1716 // restart timer 1717 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1718 btstack_run_loop_add_timer(&conn->timeout); 1719 1720 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1721 1722 hci_emit_nr_connections_changed(); 1723 } else { 1724 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1725 uint8_t status = packet[2]; 1726 bd_addr_t bd_address; 1727 memcpy(&bd_address, conn->address, 6); 1728 1729 // connection failed, remove entry 1730 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1731 btstack_memory_hci_connection_free( conn ); 1732 1733 // notify client if dedicated bonding 1734 if (notify_dedicated_bonding_failed){ 1735 log_info("hci notify_dedicated_bonding_failed"); 1736 hci_emit_dedicated_bonding_result(bd_address, status); 1737 } 1738 1739 // if authentication error, also delete link key 1740 if (packet[2] == 0x05) { 1741 gap_drop_link_key_for_bd_addr(addr); 1742 } 1743 } 1744 } 1745 break; 1746 1747 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1748 reverse_bd_addr(&packet[5], addr); 1749 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1750 if (packet[2]){ 1751 // connection failed 1752 break; 1753 } 1754 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1755 if (!conn) { 1756 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1757 } 1758 if (!conn) { 1759 break; 1760 } 1761 conn->state = OPEN; 1762 conn->con_handle = little_endian_read_16(packet, 3); 1763 1764 #ifdef ENABLE_SCO_OVER_HCI 1765 // update SCO 1766 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 1767 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1768 } 1769 #endif 1770 break; 1771 1772 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1773 handle = little_endian_read_16(packet, 3); 1774 conn = hci_connection_for_handle(handle); 1775 if (!conn) break; 1776 if (!packet[2]){ 1777 uint8_t * features = &packet[5]; 1778 if (features[6] & (1 << 3)){ 1779 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1780 } 1781 if (features[3] & (1<<7)){ 1782 conn->remote_supported_feature_eSCO = 1; 1783 } 1784 } 1785 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1786 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1787 if (conn->bonding_flags & BONDING_DEDICATED){ 1788 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1789 } 1790 break; 1791 1792 case HCI_EVENT_LINK_KEY_REQUEST: 1793 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1794 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1795 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1796 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1797 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1798 hci_run(); 1799 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1800 return; 1801 1802 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1803 reverse_bd_addr(&packet[2], addr); 1804 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1805 if (!conn) break; 1806 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1807 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1808 // Change Connection Encryption keeps link key type 1809 if (link_key_type != CHANGED_COMBINATION_KEY){ 1810 conn->link_key_type = link_key_type; 1811 } 1812 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1813 // still forward event to allow dismiss of pairing dialog 1814 break; 1815 } 1816 1817 case HCI_EVENT_PIN_CODE_REQUEST: 1818 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1819 // non-bondable mode: pin code negative reply will be sent 1820 if (!hci_stack->bondable){ 1821 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1822 hci_run(); 1823 return; 1824 } 1825 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1826 if (!hci_stack->link_key_db) break; 1827 hci_event_pin_code_request_get_bd_addr(packet, addr); 1828 hci_stack->link_key_db->delete_link_key(addr); 1829 break; 1830 1831 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1832 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1833 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1834 break; 1835 1836 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1837 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1838 if (!hci_stack->ssp_auto_accept) break; 1839 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1840 break; 1841 1842 case HCI_EVENT_USER_PASSKEY_REQUEST: 1843 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1844 if (!hci_stack->ssp_auto_accept) break; 1845 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1846 break; 1847 #endif 1848 1849 case HCI_EVENT_ENCRYPTION_CHANGE: 1850 handle = little_endian_read_16(packet, 3); 1851 conn = hci_connection_for_handle(handle); 1852 if (!conn) break; 1853 if (packet[2] == 0) { 1854 if (packet[5]){ 1855 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1856 } else { 1857 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1858 } 1859 } 1860 #ifdef ENABLE_CLASSIC 1861 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1862 #endif 1863 break; 1864 1865 #ifdef ENABLE_CLASSIC 1866 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1867 handle = little_endian_read_16(packet, 3); 1868 conn = hci_connection_for_handle(handle); 1869 if (!conn) break; 1870 1871 // dedicated bonding: send result and disconnect 1872 if (conn->bonding_flags & BONDING_DEDICATED){ 1873 conn->bonding_flags &= ~BONDING_DEDICATED; 1874 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1875 conn->bonding_status = packet[2]; 1876 break; 1877 } 1878 1879 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1880 // link key sufficient for requested security 1881 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1882 break; 1883 } 1884 // not enough 1885 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1886 break; 1887 #endif 1888 1889 // HCI_EVENT_DISCONNECTION_COMPLETE 1890 // has been split, to first notify stack before shutting connection down 1891 // see end of function, too. 1892 case HCI_EVENT_DISCONNECTION_COMPLETE: 1893 if (packet[2]) break; // status != 0 1894 handle = little_endian_read_16(packet, 3); 1895 // drop outgoing ACL fragments if it is for closed connection 1896 if (hci_stack->acl_fragmentation_total_size > 0) { 1897 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 1898 log_info("hci: drop fragmented ACL data for closed connection"); 1899 hci_stack->acl_fragmentation_total_size = 0; 1900 hci_stack->acl_fragmentation_pos = 0; 1901 } 1902 } 1903 1904 // re-enable advertisements for le connections if active 1905 conn = hci_connection_for_handle(handle); 1906 if (!conn) break; 1907 #ifdef ENABLE_BLE 1908 #ifdef ENABLE_LE_PERIPHERAL 1909 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1910 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1911 } 1912 #endif 1913 #endif 1914 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1915 break; 1916 1917 case HCI_EVENT_HARDWARE_ERROR: 1918 log_error("Hardware Error: 0x%02x", packet[2]); 1919 if (hci_stack->hardware_error_callback){ 1920 (*hci_stack->hardware_error_callback)(packet[2]); 1921 } else { 1922 // if no special requests, just reboot stack 1923 hci_power_control_off(); 1924 hci_power_control_on(); 1925 } 1926 break; 1927 1928 #ifdef ENABLE_CLASSIC 1929 case HCI_EVENT_ROLE_CHANGE: 1930 if (packet[2]) break; // status != 0 1931 handle = little_endian_read_16(packet, 3); 1932 conn = hci_connection_for_handle(handle); 1933 if (!conn) break; // no conn 1934 conn->role = packet[9]; 1935 break; 1936 #endif 1937 1938 case HCI_EVENT_TRANSPORT_PACKET_SENT: 1939 // release packet buffer only for asynchronous transport and if there are not further fragements 1940 if (hci_transport_synchronous()) { 1941 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 1942 return; // instead of break: to avoid re-entering hci_run() 1943 } 1944 if (hci_stack->acl_fragmentation_total_size) break; 1945 hci_release_packet_buffer(); 1946 1947 // L2CAP receives this event via the hci_emit_event below 1948 1949 #ifdef ENABLE_CLASSIC 1950 // For SCO, we do the can_send_now_check here 1951 hci_notify_if_sco_can_send_now(); 1952 #endif 1953 break; 1954 1955 #ifdef ENABLE_CLASSIC 1956 case HCI_EVENT_SCO_CAN_SEND_NOW: 1957 // For SCO, we do the can_send_now_check here 1958 hci_notify_if_sco_can_send_now(); 1959 return; 1960 #endif 1961 1962 #ifdef ENABLE_BLE 1963 case HCI_EVENT_LE_META: 1964 switch (packet[2]){ 1965 #ifdef ENABLE_LE_CENTRAL 1966 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1967 // log_info("advertising report received"); 1968 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1969 le_handle_advertisement_report(packet, size); 1970 break; 1971 #endif 1972 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1973 // Connection management 1974 reverse_bd_addr(&packet[8], addr); 1975 addr_type = (bd_addr_type_t)packet[7]; 1976 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1977 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1978 #ifdef ENABLE_LE_CENTRAL 1979 // if auto-connect, remove from whitelist in both roles 1980 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1981 hci_remove_from_whitelist(addr_type, addr); 1982 } 1983 // handle error: error is reported only to the initiator -> outgoing connection 1984 if (packet[3]){ 1985 // outgoing connection establishment is done 1986 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1987 // remove entry 1988 if (conn){ 1989 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1990 btstack_memory_hci_connection_free( conn ); 1991 } 1992 break; 1993 } 1994 #endif 1995 // on success, both hosts receive connection complete event 1996 if (packet[6] == HCI_ROLE_MASTER){ 1997 #ifdef ENABLE_LE_CENTRAL 1998 // if we're master, it was an outgoing connection and we're done with it 1999 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2000 #endif 2001 } else { 2002 #ifdef ENABLE_LE_PERIPHERAL 2003 // if we're slave, it was an incoming connection, advertisements have stopped 2004 hci_stack->le_advertisements_active = 0; 2005 // try to re-enable them 2006 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2007 #endif 2008 } 2009 // LE connections are auto-accepted, so just create a connection if there isn't one already 2010 if (!conn){ 2011 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2012 } 2013 // no memory, sorry. 2014 if (!conn){ 2015 break; 2016 } 2017 2018 conn->state = OPEN; 2019 conn->role = packet[6]; 2020 conn->con_handle = little_endian_read_16(packet, 4); 2021 2022 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2023 2024 // restart timer 2025 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2026 // btstack_run_loop_add_timer(&conn->timeout); 2027 2028 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2029 2030 hci_emit_nr_connections_changed(); 2031 break; 2032 2033 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2034 2035 default: 2036 break; 2037 } 2038 break; 2039 #endif 2040 default: 2041 break; 2042 } 2043 2044 // handle BT initialization 2045 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2046 hci_initializing_event_handler(packet, size); 2047 } 2048 2049 // help with BT sleep 2050 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2051 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2052 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2053 hci_initializing_next_state(); 2054 } 2055 2056 // notify upper stack 2057 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2058 2059 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2060 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2061 if (!packet[2]){ 2062 handle = little_endian_read_16(packet, 3); 2063 hci_connection_t * aConn = hci_connection_for_handle(handle); 2064 if (aConn) { 2065 uint8_t status = aConn->bonding_status; 2066 uint16_t flags = aConn->bonding_flags; 2067 bd_addr_t bd_address; 2068 memcpy(&bd_address, aConn->address, 6); 2069 hci_shutdown_connection(aConn); 2070 // connection struct is gone, don't access anymore 2071 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2072 hci_emit_dedicated_bonding_result(bd_address, status); 2073 } 2074 } 2075 } 2076 } 2077 2078 // execute main loop 2079 hci_run(); 2080 } 2081 2082 #ifdef ENABLE_CLASSIC 2083 static void sco_handler(uint8_t * packet, uint16_t size){ 2084 if (!hci_stack->sco_packet_handler) return; 2085 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2086 } 2087 #endif 2088 2089 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2090 hci_dump_packet(packet_type, 1, packet, size); 2091 switch (packet_type) { 2092 case HCI_EVENT_PACKET: 2093 event_handler(packet, size); 2094 break; 2095 case HCI_ACL_DATA_PACKET: 2096 acl_handler(packet, size); 2097 break; 2098 #ifdef ENABLE_CLASSIC 2099 case HCI_SCO_DATA_PACKET: 2100 sco_handler(packet, size); 2101 break; 2102 #endif 2103 default: 2104 break; 2105 } 2106 } 2107 2108 /** 2109 * @brief Add event packet handler. 2110 */ 2111 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2112 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2113 } 2114 2115 2116 /** Register HCI packet handlers */ 2117 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2118 hci_stack->acl_packet_handler = handler; 2119 } 2120 2121 #ifdef ENABLE_CLASSIC 2122 /** 2123 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2124 */ 2125 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2126 hci_stack->sco_packet_handler = handler; 2127 } 2128 #endif 2129 2130 static void hci_state_reset(void){ 2131 // no connections yet 2132 hci_stack->connections = NULL; 2133 2134 // keep discoverable/connectable as this has been requested by the client(s) 2135 // hci_stack->discoverable = 0; 2136 // hci_stack->connectable = 0; 2137 // hci_stack->bondable = 1; 2138 // hci_stack->own_addr_type = 0; 2139 2140 // buffer is free 2141 hci_stack->hci_packet_buffer_reserved = 0; 2142 2143 // no pending cmds 2144 hci_stack->decline_reason = 0; 2145 hci_stack->new_scan_enable_value = 0xff; 2146 2147 // LE 2148 #ifdef ENABLE_BLE 2149 memset(hci_stack->le_random_address, 0, 6); 2150 hci_stack->le_random_address_set = 0; 2151 #endif 2152 #ifdef ENABLE_LE_CENTRAL 2153 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2154 hci_stack->le_scan_type = 0xff; 2155 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2156 hci_stack->le_whitelist = 0; 2157 hci_stack->le_whitelist_capacity = 0; 2158 #endif 2159 2160 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2161 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2162 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2163 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2164 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2165 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2166 } 2167 2168 #ifdef ENABLE_CLASSIC 2169 /** 2170 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2171 */ 2172 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2173 // store and open remote device db 2174 hci_stack->link_key_db = link_key_db; 2175 if (hci_stack->link_key_db) { 2176 hci_stack->link_key_db->open(); 2177 } 2178 } 2179 #endif 2180 2181 void hci_init(const hci_transport_t *transport, const void *config){ 2182 2183 #ifdef HAVE_MALLOC 2184 if (!hci_stack) { 2185 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2186 } 2187 #else 2188 hci_stack = &hci_stack_static; 2189 #endif 2190 memset(hci_stack, 0, sizeof(hci_stack_t)); 2191 2192 // reference to use transport layer implementation 2193 hci_stack->hci_transport = transport; 2194 2195 // reference to used config 2196 hci_stack->config = config; 2197 2198 // setup pointer for outgoing packet buffer 2199 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2200 2201 // max acl payload size defined in config.h 2202 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2203 2204 // register packet handlers with transport 2205 transport->register_packet_handler(&packet_handler); 2206 2207 hci_stack->state = HCI_STATE_OFF; 2208 2209 // class of device 2210 hci_stack->class_of_device = 0x007a020c; // Smartphone 2211 2212 // bondable by default 2213 hci_stack->bondable = 1; 2214 2215 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2216 hci_stack->ssp_enable = 1; 2217 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2218 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2219 hci_stack->ssp_auto_accept = 1; 2220 2221 // voice setting - signed 8 bit pcm data with CVSD over the air 2222 hci_stack->sco_voice_setting = 0x40; 2223 2224 hci_state_reset(); 2225 } 2226 2227 /** 2228 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2229 */ 2230 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2231 hci_stack->chipset = chipset_driver; 2232 2233 // reset chipset driver - init is also called on power_up 2234 if (hci_stack->chipset && hci_stack->chipset->init){ 2235 hci_stack->chipset->init(hci_stack->config); 2236 } 2237 } 2238 2239 /** 2240 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2241 */ 2242 void hci_set_control(const btstack_control_t *hardware_control){ 2243 // references to used control implementation 2244 hci_stack->control = hardware_control; 2245 // init with transport config 2246 hardware_control->init(hci_stack->config); 2247 } 2248 2249 void hci_close(void){ 2250 // close remote device db 2251 if (hci_stack->link_key_db) { 2252 hci_stack->link_key_db->close(); 2253 } 2254 2255 btstack_linked_list_iterator_t lit; 2256 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2257 while (btstack_linked_list_iterator_has_next(&lit)){ 2258 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2259 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2260 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2261 hci_shutdown_connection(connection); 2262 } 2263 2264 hci_power_control(HCI_POWER_OFF); 2265 2266 #ifdef HAVE_MALLOC 2267 free(hci_stack); 2268 #endif 2269 hci_stack = NULL; 2270 } 2271 2272 #ifdef ENABLE_CLASSIC 2273 void gap_set_class_of_device(uint32_t class_of_device){ 2274 hci_stack->class_of_device = class_of_device; 2275 } 2276 2277 void hci_disable_l2cap_timeout_check(void){ 2278 disable_l2cap_timeouts = 1; 2279 } 2280 #endif 2281 2282 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2283 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2284 void hci_set_bd_addr(bd_addr_t addr){ 2285 memcpy(hci_stack->custom_bd_addr, addr, 6); 2286 hci_stack->custom_bd_addr_set = 1; 2287 } 2288 #endif 2289 2290 // State-Module-Driver overview 2291 // state module low-level 2292 // HCI_STATE_OFF off close 2293 // HCI_STATE_INITIALIZING, on open 2294 // HCI_STATE_WORKING, on open 2295 // HCI_STATE_HALTING, on open 2296 // HCI_STATE_SLEEPING, off/sleep close 2297 // HCI_STATE_FALLING_ASLEEP on open 2298 2299 static int hci_power_control_on(void){ 2300 2301 // power on 2302 int err = 0; 2303 if (hci_stack->control && hci_stack->control->on){ 2304 err = (*hci_stack->control->on)(); 2305 } 2306 if (err){ 2307 log_error( "POWER_ON failed"); 2308 hci_emit_hci_open_failed(); 2309 return err; 2310 } 2311 2312 // int chipset driver 2313 if (hci_stack->chipset && hci_stack->chipset->init){ 2314 hci_stack->chipset->init(hci_stack->config); 2315 } 2316 2317 // init transport 2318 if (hci_stack->hci_transport->init){ 2319 hci_stack->hci_transport->init(hci_stack->config); 2320 } 2321 2322 // open transport 2323 err = hci_stack->hci_transport->open(); 2324 if (err){ 2325 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2326 if (hci_stack->control && hci_stack->control->off){ 2327 (*hci_stack->control->off)(); 2328 } 2329 hci_emit_hci_open_failed(); 2330 return err; 2331 } 2332 return 0; 2333 } 2334 2335 static void hci_power_control_off(void){ 2336 2337 log_info("hci_power_control_off"); 2338 2339 // close low-level device 2340 hci_stack->hci_transport->close(); 2341 2342 log_info("hci_power_control_off - hci_transport closed"); 2343 2344 // power off 2345 if (hci_stack->control && hci_stack->control->off){ 2346 (*hci_stack->control->off)(); 2347 } 2348 2349 log_info("hci_power_control_off - control closed"); 2350 2351 hci_stack->state = HCI_STATE_OFF; 2352 } 2353 2354 static void hci_power_control_sleep(void){ 2355 2356 log_info("hci_power_control_sleep"); 2357 2358 #if 0 2359 // don't close serial port during sleep 2360 2361 // close low-level device 2362 hci_stack->hci_transport->close(hci_stack->config); 2363 #endif 2364 2365 // sleep mode 2366 if (hci_stack->control && hci_stack->control->sleep){ 2367 (*hci_stack->control->sleep)(); 2368 } 2369 2370 hci_stack->state = HCI_STATE_SLEEPING; 2371 } 2372 2373 static int hci_power_control_wake(void){ 2374 2375 log_info("hci_power_control_wake"); 2376 2377 // wake on 2378 if (hci_stack->control && hci_stack->control->wake){ 2379 (*hci_stack->control->wake)(); 2380 } 2381 2382 #if 0 2383 // open low-level device 2384 int err = hci_stack->hci_transport->open(hci_stack->config); 2385 if (err){ 2386 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2387 if (hci_stack->control && hci_stack->control->off){ 2388 (*hci_stack->control->off)(); 2389 } 2390 hci_emit_hci_open_failed(); 2391 return err; 2392 } 2393 #endif 2394 2395 return 0; 2396 } 2397 2398 static void hci_power_transition_to_initializing(void){ 2399 // set up state machine 2400 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2401 hci_stack->hci_packet_buffer_reserved = 0; 2402 hci_stack->state = HCI_STATE_INITIALIZING; 2403 hci_stack->substate = HCI_INIT_SEND_RESET; 2404 } 2405 2406 int hci_power_control(HCI_POWER_MODE power_mode){ 2407 2408 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2409 2410 int err = 0; 2411 switch (hci_stack->state){ 2412 2413 case HCI_STATE_OFF: 2414 switch (power_mode){ 2415 case HCI_POWER_ON: 2416 err = hci_power_control_on(); 2417 if (err) { 2418 log_error("hci_power_control_on() error %d", err); 2419 return err; 2420 } 2421 hci_power_transition_to_initializing(); 2422 break; 2423 case HCI_POWER_OFF: 2424 // do nothing 2425 break; 2426 case HCI_POWER_SLEEP: 2427 // do nothing (with SLEEP == OFF) 2428 break; 2429 } 2430 break; 2431 2432 case HCI_STATE_INITIALIZING: 2433 switch (power_mode){ 2434 case HCI_POWER_ON: 2435 // do nothing 2436 break; 2437 case HCI_POWER_OFF: 2438 // no connections yet, just turn it off 2439 hci_power_control_off(); 2440 break; 2441 case HCI_POWER_SLEEP: 2442 // no connections yet, just turn it off 2443 hci_power_control_sleep(); 2444 break; 2445 } 2446 break; 2447 2448 case HCI_STATE_WORKING: 2449 switch (power_mode){ 2450 case HCI_POWER_ON: 2451 // do nothing 2452 break; 2453 case HCI_POWER_OFF: 2454 // see hci_run 2455 hci_stack->state = HCI_STATE_HALTING; 2456 break; 2457 case HCI_POWER_SLEEP: 2458 // see hci_run 2459 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2460 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2461 break; 2462 } 2463 break; 2464 2465 case HCI_STATE_HALTING: 2466 switch (power_mode){ 2467 case HCI_POWER_ON: 2468 hci_power_transition_to_initializing(); 2469 break; 2470 case HCI_POWER_OFF: 2471 // do nothing 2472 break; 2473 case HCI_POWER_SLEEP: 2474 // see hci_run 2475 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2476 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2477 break; 2478 } 2479 break; 2480 2481 case HCI_STATE_FALLING_ASLEEP: 2482 switch (power_mode){ 2483 case HCI_POWER_ON: 2484 2485 #ifdef HAVE_PLATFORM_IPHONE_OS 2486 // nothing to do, if H4 supports power management 2487 if (btstack_control_iphone_power_management_enabled()){ 2488 hci_stack->state = HCI_STATE_INITIALIZING; 2489 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2490 break; 2491 } 2492 #endif 2493 hci_power_transition_to_initializing(); 2494 break; 2495 case HCI_POWER_OFF: 2496 // see hci_run 2497 hci_stack->state = HCI_STATE_HALTING; 2498 break; 2499 case HCI_POWER_SLEEP: 2500 // do nothing 2501 break; 2502 } 2503 break; 2504 2505 case HCI_STATE_SLEEPING: 2506 switch (power_mode){ 2507 case HCI_POWER_ON: 2508 2509 #ifdef HAVE_PLATFORM_IPHONE_OS 2510 // nothing to do, if H4 supports power management 2511 if (btstack_control_iphone_power_management_enabled()){ 2512 hci_stack->state = HCI_STATE_INITIALIZING; 2513 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2514 hci_update_scan_enable(); 2515 break; 2516 } 2517 #endif 2518 err = hci_power_control_wake(); 2519 if (err) return err; 2520 hci_power_transition_to_initializing(); 2521 break; 2522 case HCI_POWER_OFF: 2523 hci_stack->state = HCI_STATE_HALTING; 2524 break; 2525 case HCI_POWER_SLEEP: 2526 // do nothing 2527 break; 2528 } 2529 break; 2530 } 2531 2532 // create internal event 2533 hci_emit_state(); 2534 2535 // trigger next/first action 2536 hci_run(); 2537 2538 return 0; 2539 } 2540 2541 2542 #ifdef ENABLE_CLASSIC 2543 2544 static void hci_update_scan_enable(void){ 2545 // 2 = page scan, 1 = inq scan 2546 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2547 hci_run(); 2548 } 2549 2550 void gap_discoverable_control(uint8_t enable){ 2551 if (enable) enable = 1; // normalize argument 2552 2553 if (hci_stack->discoverable == enable){ 2554 hci_emit_discoverable_enabled(hci_stack->discoverable); 2555 return; 2556 } 2557 2558 hci_stack->discoverable = enable; 2559 hci_update_scan_enable(); 2560 } 2561 2562 void gap_connectable_control(uint8_t enable){ 2563 if (enable) enable = 1; // normalize argument 2564 2565 // don't emit event 2566 if (hci_stack->connectable == enable) return; 2567 2568 hci_stack->connectable = enable; 2569 hci_update_scan_enable(); 2570 } 2571 #endif 2572 2573 void gap_local_bd_addr(bd_addr_t address_buffer){ 2574 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2575 } 2576 2577 static void hci_run(void){ 2578 2579 // log_info("hci_run: entered"); 2580 btstack_linked_item_t * it; 2581 2582 // send continuation fragments first, as they block the prepared packet buffer 2583 if (hci_stack->acl_fragmentation_total_size > 0) { 2584 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2585 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2586 if (connection) { 2587 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2588 hci_send_acl_packet_fragments(connection); 2589 return; 2590 } 2591 } else { 2592 // connection gone -> discard further fragments 2593 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2594 hci_stack->acl_fragmentation_total_size = 0; 2595 hci_stack->acl_fragmentation_pos = 0; 2596 } 2597 } 2598 2599 if (!hci_can_send_command_packet_now()) return; 2600 2601 // global/non-connection oriented commands 2602 2603 #ifdef ENABLE_CLASSIC 2604 // decline incoming connections 2605 if (hci_stack->decline_reason){ 2606 uint8_t reason = hci_stack->decline_reason; 2607 hci_stack->decline_reason = 0; 2608 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2609 return; 2610 } 2611 2612 // send scan enable 2613 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2614 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2615 hci_stack->new_scan_enable_value = 0xff; 2616 return; 2617 } 2618 #endif 2619 2620 #ifdef ENABLE_BLE 2621 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 2622 if ((hci_stack->state == HCI_STATE_WORKING) 2623 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 2624 2625 #ifdef ENABLE_LE_CENTRAL 2626 // handle le scan 2627 switch(hci_stack->le_scanning_state){ 2628 case LE_START_SCAN: 2629 hci_stack->le_scanning_state = LE_SCANNING; 2630 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2631 return; 2632 2633 case LE_STOP_SCAN: 2634 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2635 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2636 return; 2637 default: 2638 break; 2639 } 2640 if (hci_stack->le_scan_type != 0xff){ 2641 // defaults: active scanning, accept all advertisement packets 2642 int scan_type = hci_stack->le_scan_type; 2643 hci_stack->le_scan_type = 0xff; 2644 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); 2645 return; 2646 } 2647 #endif 2648 #ifdef ENABLE_LE_PERIPHERAL 2649 // le advertisement control 2650 if (hci_stack->le_advertisements_todo){ 2651 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2652 } 2653 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2654 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2655 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2656 return; 2657 } 2658 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2659 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2660 hci_send_cmd(&hci_le_set_advertising_parameters, 2661 hci_stack->le_advertisements_interval_min, 2662 hci_stack->le_advertisements_interval_max, 2663 hci_stack->le_advertisements_type, 2664 hci_stack->le_own_addr_type, 2665 hci_stack->le_advertisements_direct_address_type, 2666 hci_stack->le_advertisements_direct_address, 2667 hci_stack->le_advertisements_channel_map, 2668 hci_stack->le_advertisements_filter_policy); 2669 return; 2670 } 2671 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2672 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2673 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, hci_stack->le_advertisements_data); 2674 return; 2675 } 2676 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2677 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2678 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2679 hci_stack->le_scan_response_data); 2680 return; 2681 } 2682 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2683 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2684 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2685 return; 2686 } 2687 #endif 2688 2689 #ifdef ENABLE_LE_CENTRAL 2690 // 2691 // LE Whitelist Management 2692 // 2693 2694 // check if whitelist needs modification 2695 btstack_linked_list_iterator_t lit; 2696 int modification_pending = 0; 2697 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2698 while (btstack_linked_list_iterator_has_next(&lit)){ 2699 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2700 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2701 modification_pending = 1; 2702 break; 2703 } 2704 } 2705 2706 if (modification_pending){ 2707 // stop connnecting if modification pending 2708 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2709 hci_send_cmd(&hci_le_create_connection_cancel); 2710 return; 2711 } 2712 2713 // add/remove entries 2714 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2715 while (btstack_linked_list_iterator_has_next(&lit)){ 2716 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2717 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2718 entry->state = LE_WHITELIST_ON_CONTROLLER; 2719 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2720 return; 2721 2722 } 2723 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2724 bd_addr_t address; 2725 bd_addr_type_t address_type = entry->address_type; 2726 memcpy(address, entry->address, 6); 2727 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2728 btstack_memory_whitelist_entry_free(entry); 2729 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2730 return; 2731 } 2732 } 2733 } 2734 2735 // start connecting 2736 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2737 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2738 bd_addr_t null_addr; 2739 memset(null_addr, 0, 6); 2740 hci_send_cmd(&hci_le_create_connection, 2741 0x0060, // scan interval: 60 ms 2742 0x0030, // scan interval: 30 ms 2743 1, // use whitelist 2744 0, // peer address type 2745 null_addr, // peer bd addr 2746 hci_stack->le_own_addr_type, // our addr type: 2747 0x0008, // conn interval min 2748 0x0018, // conn interval max 2749 0, // conn latency 2750 0x0048, // supervision timeout 2751 0x0001, // min ce length 2752 0x0001 // max ce length 2753 ); 2754 return; 2755 } 2756 #endif 2757 } 2758 #endif 2759 2760 // send pending HCI commands 2761 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2762 hci_connection_t * connection = (hci_connection_t *) it; 2763 2764 switch(connection->state){ 2765 case SEND_CREATE_CONNECTION: 2766 switch(connection->address_type){ 2767 #ifdef ENABLE_CLASSIC 2768 case BD_ADDR_TYPE_CLASSIC: 2769 log_info("sending hci_create_connection"); 2770 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2771 break; 2772 #endif 2773 default: 2774 #ifdef ENABLE_BLE 2775 #ifdef ENABLE_LE_CENTRAL 2776 log_info("sending hci_le_create_connection"); 2777 hci_send_cmd(&hci_le_create_connection, 2778 0x0060, // scan interval: 60 ms 2779 0x0030, // scan interval: 30 ms 2780 0, // don't use whitelist 2781 connection->address_type, // peer address type 2782 connection->address, // peer bd addr 2783 hci_stack->le_own_addr_type, // our addr type: 2784 0x0008, // conn interval min 2785 0x0018, // conn interval max 2786 0, // conn latency 2787 0x0048, // supervision timeout 2788 0x0001, // min ce length 2789 0x0001 // max ce length 2790 ); 2791 2792 connection->state = SENT_CREATE_CONNECTION; 2793 #endif 2794 #endif 2795 break; 2796 } 2797 return; 2798 2799 #ifdef ENABLE_CLASSIC 2800 case RECEIVED_CONNECTION_REQUEST: 2801 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2802 connection->state = ACCEPTED_CONNECTION_REQUEST; 2803 connection->role = HCI_ROLE_SLAVE; 2804 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2805 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2806 } 2807 return; 2808 #endif 2809 2810 #ifdef ENABLE_BLE 2811 #ifdef ENABLE_LE_CENTRAL 2812 case SEND_CANCEL_CONNECTION: 2813 connection->state = SENT_CANCEL_CONNECTION; 2814 hci_send_cmd(&hci_le_create_connection_cancel); 2815 return; 2816 #endif 2817 #endif 2818 case SEND_DISCONNECT: 2819 connection->state = SENT_DISCONNECT; 2820 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2821 return; 2822 2823 default: 2824 break; 2825 } 2826 2827 #ifdef ENABLE_CLASSIC 2828 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2829 log_info("responding to link key request"); 2830 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2831 link_key_t link_key; 2832 link_key_type_t link_key_type; 2833 if ( hci_stack->link_key_db 2834 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 2835 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2836 connection->link_key_type = link_key_type; 2837 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2838 } else { 2839 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2840 } 2841 return; 2842 } 2843 2844 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2845 log_info("denying to pin request"); 2846 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2847 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2848 return; 2849 } 2850 2851 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2852 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2853 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2854 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2855 // tweak authentication requirements 2856 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2857 if (connection->bonding_flags & BONDING_DEDICATED){ 2858 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2859 } 2860 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2861 authreq |= 1; 2862 } 2863 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2864 } else { 2865 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2866 } 2867 return; 2868 } 2869 2870 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2871 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2872 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2873 return; 2874 } 2875 2876 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2877 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2878 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2879 return; 2880 } 2881 2882 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2883 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2884 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2885 return; 2886 } 2887 2888 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2889 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2890 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2891 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2892 return; 2893 } 2894 2895 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2896 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2897 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2898 return; 2899 } 2900 2901 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2902 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2903 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2904 return; 2905 } 2906 #endif 2907 2908 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2909 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2910 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2911 return; 2912 } 2913 2914 #ifdef ENABLE_BLE 2915 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2916 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2917 2918 uint16_t connection_interval_min = connection->le_conn_interval_min; 2919 connection->le_conn_interval_min = 0; 2920 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2921 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2922 0x0000, 0xffff); 2923 } 2924 #endif 2925 } 2926 2927 hci_connection_t * connection; 2928 switch (hci_stack->state){ 2929 case HCI_STATE_INITIALIZING: 2930 hci_initializing_run(); 2931 break; 2932 2933 case HCI_STATE_HALTING: 2934 2935 log_info("HCI_STATE_HALTING"); 2936 2937 // free whitelist entries 2938 #ifdef ENABLE_BLE 2939 #ifdef ENABLE_LE_CENTRAL 2940 { 2941 btstack_linked_list_iterator_t lit; 2942 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2943 while (btstack_linked_list_iterator_has_next(&lit)){ 2944 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2945 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2946 btstack_memory_whitelist_entry_free(entry); 2947 } 2948 } 2949 #endif 2950 #endif 2951 // close all open connections 2952 connection = (hci_connection_t *) hci_stack->connections; 2953 if (connection){ 2954 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 2955 if (!hci_can_send_command_packet_now()) return; 2956 2957 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2958 2959 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2960 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2961 2962 // ... which would be ignored anyway as we shutdown (free) the connection now 2963 hci_shutdown_connection(connection); 2964 2965 // finally, send the disconnect command 2966 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2967 return; 2968 } 2969 log_info("HCI_STATE_HALTING, calling off"); 2970 2971 // switch mode 2972 hci_power_control_off(); 2973 2974 log_info("HCI_STATE_HALTING, emitting state"); 2975 hci_emit_state(); 2976 log_info("HCI_STATE_HALTING, done"); 2977 break; 2978 2979 case HCI_STATE_FALLING_ASLEEP: 2980 switch(hci_stack->substate) { 2981 case HCI_FALLING_ASLEEP_DISCONNECT: 2982 log_info("HCI_STATE_FALLING_ASLEEP"); 2983 // close all open connections 2984 connection = (hci_connection_t *) hci_stack->connections; 2985 2986 #ifdef HAVE_PLATFORM_IPHONE_OS 2987 // don't close connections, if H4 supports power management 2988 if (btstack_control_iphone_power_management_enabled()){ 2989 connection = NULL; 2990 } 2991 #endif 2992 if (connection){ 2993 2994 // send disconnect 2995 if (!hci_can_send_command_packet_now()) return; 2996 2997 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2998 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2999 3000 // send disconnected event right away - causes higher layer connections to get closed, too. 3001 hci_shutdown_connection(connection); 3002 return; 3003 } 3004 3005 if (hci_classic_supported()){ 3006 // disable page and inquiry scan 3007 if (!hci_can_send_command_packet_now()) return; 3008 3009 log_info("HCI_STATE_HALTING, disabling inq scans"); 3010 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3011 3012 // continue in next sub state 3013 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3014 break; 3015 } 3016 // no break - fall through for ble-only chips 3017 3018 case HCI_FALLING_ASLEEP_COMPLETE: 3019 log_info("HCI_STATE_HALTING, calling sleep"); 3020 #ifdef HAVE_PLATFORM_IPHONE_OS 3021 // don't actually go to sleep, if H4 supports power management 3022 if (btstack_control_iphone_power_management_enabled()){ 3023 // SLEEP MODE reached 3024 hci_stack->state = HCI_STATE_SLEEPING; 3025 hci_emit_state(); 3026 break; 3027 } 3028 #endif 3029 // switch mode 3030 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3031 hci_emit_state(); 3032 break; 3033 3034 default: 3035 break; 3036 } 3037 break; 3038 3039 default: 3040 break; 3041 } 3042 } 3043 3044 int hci_send_cmd_packet(uint8_t *packet, int size){ 3045 // house-keeping 3046 3047 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3048 hci_stack->loopback_mode = packet[3]; 3049 } 3050 3051 #ifdef ENABLE_CLASSIC 3052 bd_addr_t addr; 3053 hci_connection_t * conn; 3054 3055 // create_connection? 3056 if (IS_COMMAND(packet, hci_create_connection)){ 3057 reverse_bd_addr(&packet[3], addr); 3058 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3059 3060 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3061 if (!conn){ 3062 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3063 if (!conn){ 3064 // notify client that alloc failed 3065 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3066 return 0; // don't sent packet to controller 3067 } 3068 conn->state = SEND_CREATE_CONNECTION; 3069 } 3070 log_info("conn state %u", conn->state); 3071 switch (conn->state){ 3072 // if connection active exists 3073 case OPEN: 3074 // and OPEN, emit connection complete command, don't send to controller 3075 hci_emit_connection_complete(addr, conn->con_handle, 0); 3076 return 0; 3077 case SEND_CREATE_CONNECTION: 3078 // connection created by hci, e.g. dedicated bonding 3079 break; 3080 default: 3081 // otherwise, just ignore as it is already in the open process 3082 return 0; 3083 } 3084 conn->state = SENT_CREATE_CONNECTION; 3085 } 3086 3087 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3088 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3089 } 3090 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3091 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3092 } 3093 3094 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3095 if (hci_stack->link_key_db){ 3096 reverse_bd_addr(&packet[3], addr); 3097 hci_stack->link_key_db->delete_link_key(addr); 3098 } 3099 } 3100 3101 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3102 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3103 reverse_bd_addr(&packet[3], addr); 3104 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3105 if (conn){ 3106 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3107 } 3108 } 3109 3110 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3111 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3112 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3113 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3114 reverse_bd_addr(&packet[3], addr); 3115 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3116 if (conn){ 3117 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3118 } 3119 } 3120 3121 #ifdef ENABLE_SCO_OVER_HCI 3122 // setup_synchronous_connection? Voice setting at offset 22 3123 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3124 // TODO: compare to current setting if sco connection already active 3125 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3126 } 3127 // accept_synchronus_connection? Voice setting at offset 18 3128 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3129 // TODO: compare to current setting if sco connection already active 3130 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3131 } 3132 #endif 3133 #endif 3134 3135 #ifdef ENABLE_BLE 3136 #ifdef ENABLE_LE_PERIPHERAL 3137 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3138 hci_stack->le_random_address_set = 1; 3139 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3140 } 3141 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3142 hci_stack->le_advertisements_active = packet[3]; 3143 } 3144 #endif 3145 #ifdef ENABLE_LE_CENTRAL 3146 if (IS_COMMAND(packet, hci_le_create_connection)){ 3147 // white list used? 3148 uint8_t initiator_filter_policy = packet[7]; 3149 switch (initiator_filter_policy){ 3150 case 0: 3151 // whitelist not used 3152 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3153 break; 3154 case 1: 3155 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3156 break; 3157 default: 3158 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3159 break; 3160 } 3161 } 3162 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3163 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3164 } 3165 #endif 3166 #endif 3167 3168 hci_stack->num_cmd_packets--; 3169 3170 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3171 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3172 3173 // release packet buffer for synchronous transport implementations 3174 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3175 hci_stack->hci_packet_buffer_reserved = 0; 3176 } 3177 3178 return err; 3179 } 3180 3181 // disconnect because of security block 3182 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3183 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3184 if (!connection) return; 3185 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3186 } 3187 3188 3189 // Configure Secure Simple Pairing 3190 3191 #ifdef ENABLE_CLASSIC 3192 3193 // enable will enable SSP during init 3194 void gap_ssp_set_enable(int enable){ 3195 hci_stack->ssp_enable = enable; 3196 } 3197 3198 static int hci_local_ssp_activated(void){ 3199 return gap_ssp_supported() && hci_stack->ssp_enable; 3200 } 3201 3202 // if set, BTstack will respond to io capability request using authentication requirement 3203 void gap_ssp_set_io_capability(int io_capability){ 3204 hci_stack->ssp_io_capability = io_capability; 3205 } 3206 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3207 hci_stack->ssp_authentication_requirement = authentication_requirement; 3208 } 3209 3210 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3211 void gap_ssp_set_auto_accept(int auto_accept){ 3212 hci_stack->ssp_auto_accept = auto_accept; 3213 } 3214 #endif 3215 3216 // va_list part of hci_send_cmd 3217 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3218 if (!hci_can_send_command_packet_now()){ 3219 log_error("hci_send_cmd called but cannot send packet now"); 3220 return 0; 3221 } 3222 3223 // for HCI INITIALIZATION 3224 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3225 hci_stack->last_cmd_opcode = cmd->opcode; 3226 3227 hci_reserve_packet_buffer(); 3228 uint8_t * packet = hci_stack->hci_packet_buffer; 3229 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3230 return hci_send_cmd_packet(packet, size); 3231 } 3232 3233 /** 3234 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3235 */ 3236 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3237 va_list argptr; 3238 va_start(argptr, cmd); 3239 int res = hci_send_cmd_va_arg(cmd, argptr); 3240 va_end(argptr); 3241 return res; 3242 } 3243 3244 // Create various non-HCI events. 3245 // TODO: generalize, use table similar to hci_create_command 3246 3247 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3248 // dump packet 3249 if (dump) { 3250 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3251 } 3252 3253 // dispatch to all event handlers 3254 btstack_linked_list_iterator_t it; 3255 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3256 while (btstack_linked_list_iterator_has_next(&it)){ 3257 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3258 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3259 } 3260 } 3261 3262 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3263 if (!hci_stack->acl_packet_handler) return; 3264 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3265 } 3266 3267 #ifdef ENABLE_CLASSIC 3268 static void hci_notify_if_sco_can_send_now(void){ 3269 // notify SCO sender if waiting 3270 if (!hci_stack->sco_waiting_for_can_send_now) return; 3271 if (hci_can_send_sco_packet_now()){ 3272 hci_stack->sco_waiting_for_can_send_now = 0; 3273 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3274 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3275 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3276 } 3277 } 3278 #endif 3279 3280 void hci_emit_state(void){ 3281 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3282 uint8_t event[3]; 3283 event[0] = BTSTACK_EVENT_STATE; 3284 event[1] = sizeof(event) - 2; 3285 event[2] = hci_stack->state; 3286 hci_emit_event(event, sizeof(event), 1); 3287 } 3288 3289 #ifdef ENABLE_CLASSIC 3290 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3291 uint8_t event[13]; 3292 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3293 event[1] = sizeof(event) - 2; 3294 event[2] = status; 3295 little_endian_store_16(event, 3, con_handle); 3296 reverse_bd_addr(address, &event[5]); 3297 event[11] = 1; // ACL connection 3298 event[12] = 0; // encryption disabled 3299 hci_emit_event(event, sizeof(event), 1); 3300 } 3301 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3302 if (disable_l2cap_timeouts) return; 3303 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3304 uint8_t event[4]; 3305 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3306 event[1] = sizeof(event) - 2; 3307 little_endian_store_16(event, 2, conn->con_handle); 3308 hci_emit_event(event, sizeof(event), 1); 3309 } 3310 #endif 3311 3312 #ifdef ENABLE_BLE 3313 #ifdef ENABLE_LE_CENTRAL 3314 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3315 uint8_t event[21]; 3316 event[0] = HCI_EVENT_LE_META; 3317 event[1] = sizeof(event) - 2; 3318 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3319 event[3] = status; 3320 little_endian_store_16(event, 4, con_handle); 3321 event[6] = 0; // TODO: role 3322 event[7] = address_type; 3323 reverse_bd_addr(address, &event[8]); 3324 little_endian_store_16(event, 14, 0); // interval 3325 little_endian_store_16(event, 16, 0); // latency 3326 little_endian_store_16(event, 18, 0); // supervision timeout 3327 event[20] = 0; // master clock accuracy 3328 hci_emit_event(event, sizeof(event), 1); 3329 } 3330 #endif 3331 #endif 3332 3333 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3334 uint8_t event[6]; 3335 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3336 event[1] = sizeof(event) - 2; 3337 event[2] = 0; // status = OK 3338 little_endian_store_16(event, 3, con_handle); 3339 event[5] = reason; 3340 hci_emit_event(event, sizeof(event), 1); 3341 } 3342 3343 static void hci_emit_nr_connections_changed(void){ 3344 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3345 uint8_t event[3]; 3346 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3347 event[1] = sizeof(event) - 2; 3348 event[2] = nr_hci_connections(); 3349 hci_emit_event(event, sizeof(event), 1); 3350 } 3351 3352 static void hci_emit_hci_open_failed(void){ 3353 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3354 uint8_t event[2]; 3355 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3356 event[1] = sizeof(event) - 2; 3357 hci_emit_event(event, sizeof(event), 1); 3358 } 3359 3360 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3361 log_info("hci_emit_dedicated_bonding_result %u ", status); 3362 uint8_t event[9]; 3363 int pos = 0; 3364 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3365 event[pos++] = sizeof(event) - 2; 3366 event[pos++] = status; 3367 reverse_bd_addr(address, &event[pos]); 3368 hci_emit_event(event, sizeof(event), 1); 3369 } 3370 3371 3372 #ifdef ENABLE_CLASSIC 3373 3374 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3375 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3376 uint8_t event[5]; 3377 int pos = 0; 3378 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3379 event[pos++] = sizeof(event) - 2; 3380 little_endian_store_16(event, 2, con_handle); 3381 pos += 2; 3382 event[pos++] = level; 3383 hci_emit_event(event, sizeof(event), 1); 3384 } 3385 3386 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3387 if (!connection) return LEVEL_0; 3388 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3389 return gap_security_level_for_link_key_type(connection->link_key_type); 3390 } 3391 3392 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3393 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3394 uint8_t event[3]; 3395 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3396 event[1] = sizeof(event) - 2; 3397 event[2] = enabled; 3398 hci_emit_event(event, sizeof(event), 1); 3399 } 3400 3401 #ifdef ENABLE_CLASSIC 3402 // query if remote side supports eSCO 3403 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3404 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3405 if (!connection) return 0; 3406 return connection->remote_supported_feature_eSCO; 3407 } 3408 3409 // query if remote side supports SSP 3410 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3411 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3412 if (!connection) return 0; 3413 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3414 } 3415 3416 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3417 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3418 } 3419 #endif 3420 3421 // GAP API 3422 /** 3423 * @bbrief enable/disable bonding. default is enabled 3424 * @praram enabled 3425 */ 3426 void gap_set_bondable_mode(int enable){ 3427 hci_stack->bondable = enable ? 1 : 0; 3428 } 3429 /** 3430 * @brief Get bondable mode. 3431 * @return 1 if bondable 3432 */ 3433 int gap_get_bondable_mode(void){ 3434 return hci_stack->bondable; 3435 } 3436 3437 /** 3438 * @brief map link keys to security levels 3439 */ 3440 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3441 switch (link_key_type){ 3442 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3443 return LEVEL_4; 3444 case COMBINATION_KEY: 3445 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3446 return LEVEL_3; 3447 default: 3448 return LEVEL_2; 3449 } 3450 } 3451 3452 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3453 log_info("gap_mitm_protection_required_for_security_level %u", level); 3454 return level > LEVEL_2; 3455 } 3456 3457 /** 3458 * @brief get current security level 3459 */ 3460 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3461 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3462 if (!connection) return LEVEL_0; 3463 return gap_security_level_for_connection(connection); 3464 } 3465 3466 /** 3467 * @brief request connection to device to 3468 * @result GAP_AUTHENTICATION_RESULT 3469 */ 3470 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3471 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3472 if (!connection){ 3473 hci_emit_security_level(con_handle, LEVEL_0); 3474 return; 3475 } 3476 gap_security_level_t current_level = gap_security_level(con_handle); 3477 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3478 if (current_level >= requested_level){ 3479 hci_emit_security_level(con_handle, current_level); 3480 return; 3481 } 3482 3483 connection->requested_security_level = requested_level; 3484 3485 #if 0 3486 // sending encryption request without a link key results in an error. 3487 // TODO: figure out how to use it properly 3488 3489 // would enabling ecnryption suffice (>= LEVEL_2)? 3490 if (hci_stack->link_key_db){ 3491 link_key_type_t link_key_type; 3492 link_key_t link_key; 3493 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3494 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3495 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3496 return; 3497 } 3498 } 3499 } 3500 #endif 3501 3502 // try to authenticate connection 3503 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3504 hci_run(); 3505 } 3506 3507 /** 3508 * @brief start dedicated bonding with device. disconnect after bonding 3509 * @param device 3510 * @param request MITM protection 3511 * @result GAP_DEDICATED_BONDING_COMPLETE 3512 */ 3513 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3514 3515 // create connection state machine 3516 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3517 3518 if (!connection){ 3519 return BTSTACK_MEMORY_ALLOC_FAILED; 3520 } 3521 3522 // delete linkn key 3523 gap_drop_link_key_for_bd_addr(device); 3524 3525 // configure LEVEL_2/3, dedicated bonding 3526 connection->state = SEND_CREATE_CONNECTION; 3527 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3528 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3529 connection->bonding_flags = BONDING_DEDICATED; 3530 3531 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3532 3533 // handle: connnection failure (connection complete != ok) 3534 // handle: authentication failure 3535 // handle: disconnect on done 3536 3537 hci_run(); 3538 3539 return 0; 3540 } 3541 #endif 3542 3543 void gap_set_local_name(const char * local_name){ 3544 hci_stack->local_name = local_name; 3545 } 3546 3547 3548 #ifdef ENABLE_BLE 3549 3550 #ifdef ENABLE_LE_CENTRAL 3551 void gap_start_scan(void){ 3552 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3553 hci_stack->le_scanning_state = LE_START_SCAN; 3554 hci_run(); 3555 } 3556 3557 void gap_stop_scan(void){ 3558 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3559 hci_stack->le_scanning_state = LE_STOP_SCAN; 3560 hci_run(); 3561 } 3562 3563 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3564 hci_stack->le_scan_type = scan_type; 3565 hci_stack->le_scan_interval = scan_interval; 3566 hci_stack->le_scan_window = scan_window; 3567 hci_run(); 3568 } 3569 3570 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3571 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3572 if (!conn){ 3573 log_info("gap_connect: no connection exists yet, creating context"); 3574 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3575 if (!conn){ 3576 // notify client that alloc failed 3577 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3578 log_info("gap_connect: failed to alloc hci_connection_t"); 3579 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3580 } 3581 conn->state = SEND_CREATE_CONNECTION; 3582 log_info("gap_connect: send create connection next"); 3583 hci_run(); 3584 return 0; 3585 } 3586 3587 if (!hci_is_le_connection(conn) || 3588 conn->state == SEND_CREATE_CONNECTION || 3589 conn->state == SENT_CREATE_CONNECTION) { 3590 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3591 log_error("gap_connect: classic connection or connect is already being created"); 3592 return GATT_CLIENT_IN_WRONG_STATE; 3593 } 3594 3595 log_info("gap_connect: context exists with state %u", conn->state); 3596 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3597 hci_run(); 3598 return 0; 3599 } 3600 3601 // @assumption: only a single outgoing LE Connection exists 3602 static hci_connection_t * gap_get_outgoing_connection(void){ 3603 btstack_linked_item_t *it; 3604 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3605 hci_connection_t * conn = (hci_connection_t *) it; 3606 if (!hci_is_le_connection(conn)) continue; 3607 switch (conn->state){ 3608 case SEND_CREATE_CONNECTION: 3609 case SENT_CREATE_CONNECTION: 3610 return conn; 3611 default: 3612 break; 3613 }; 3614 } 3615 return NULL; 3616 } 3617 3618 uint8_t gap_connect_cancel(void){ 3619 hci_connection_t * conn = gap_get_outgoing_connection(); 3620 if (!conn) return 0; 3621 switch (conn->state){ 3622 case SEND_CREATE_CONNECTION: 3623 // skip sending create connection and emit event instead 3624 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3625 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3626 btstack_memory_hci_connection_free( conn ); 3627 break; 3628 case SENT_CREATE_CONNECTION: 3629 // request to send cancel connection 3630 conn->state = SEND_CANCEL_CONNECTION; 3631 hci_run(); 3632 break; 3633 default: 3634 break; 3635 } 3636 return 0; 3637 } 3638 #endif 3639 3640 /** 3641 * @brief Updates the connection parameters for a given LE connection 3642 * @param handle 3643 * @param conn_interval_min (unit: 1.25ms) 3644 * @param conn_interval_max (unit: 1.25ms) 3645 * @param conn_latency 3646 * @param supervision_timeout (unit: 10ms) 3647 * @returns 0 if ok 3648 */ 3649 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3650 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3651 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3652 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3653 connection->le_conn_interval_min = conn_interval_min; 3654 connection->le_conn_interval_max = conn_interval_max; 3655 connection->le_conn_latency = conn_latency; 3656 connection->le_supervision_timeout = supervision_timeout; 3657 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3658 hci_run(); 3659 return 0; 3660 } 3661 3662 /** 3663 * @brief Request an update of the connection parameter for a given LE connection 3664 * @param handle 3665 * @param conn_interval_min (unit: 1.25ms) 3666 * @param conn_interval_max (unit: 1.25ms) 3667 * @param conn_latency 3668 * @param supervision_timeout (unit: 10ms) 3669 * @returns 0 if ok 3670 */ 3671 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3672 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3673 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3674 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3675 connection->le_conn_interval_min = conn_interval_min; 3676 connection->le_conn_interval_max = conn_interval_max; 3677 connection->le_conn_latency = conn_latency; 3678 connection->le_supervision_timeout = supervision_timeout; 3679 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3680 hci_run(); 3681 return 0; 3682 } 3683 3684 #ifdef ENABLE_LE_PERIPHERAL 3685 3686 static void gap_advertisments_changed(void){ 3687 // disable advertisements before updating adv, scan data, or adv params 3688 if (hci_stack->le_advertisements_active){ 3689 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3690 } 3691 hci_run(); 3692 } 3693 3694 /** 3695 * @brief Set Advertisement Data 3696 * @param advertising_data_length 3697 * @param advertising_data (max 31 octets) 3698 * @note data is not copied, pointer has to stay valid 3699 */ 3700 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3701 hci_stack->le_advertisements_data_len = advertising_data_length; 3702 hci_stack->le_advertisements_data = advertising_data; 3703 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3704 gap_advertisments_changed(); 3705 } 3706 3707 /** 3708 * @brief Set Scan Response Data 3709 * @param advertising_data_length 3710 * @param advertising_data (max 31 octets) 3711 * @note data is not copied, pointer has to stay valid 3712 */ 3713 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3714 hci_stack->le_scan_response_data_len = scan_response_data_length; 3715 hci_stack->le_scan_response_data = scan_response_data; 3716 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3717 gap_advertisments_changed(); 3718 } 3719 3720 /** 3721 * @brief Set Advertisement Parameters 3722 * @param adv_int_min 3723 * @param adv_int_max 3724 * @param adv_type 3725 * @param direct_address_type 3726 * @param direct_address 3727 * @param channel_map 3728 * @param filter_policy 3729 * 3730 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3731 */ 3732 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3733 uint8_t direct_address_typ, bd_addr_t direct_address, 3734 uint8_t channel_map, uint8_t filter_policy) { 3735 3736 hci_stack->le_advertisements_interval_min = adv_int_min; 3737 hci_stack->le_advertisements_interval_max = adv_int_max; 3738 hci_stack->le_advertisements_type = adv_type; 3739 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3740 hci_stack->le_advertisements_channel_map = channel_map; 3741 hci_stack->le_advertisements_filter_policy = filter_policy; 3742 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3743 3744 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3745 gap_advertisments_changed(); 3746 } 3747 3748 /** 3749 * @brief Enable/Disable Advertisements 3750 * @param enabled 3751 */ 3752 void gap_advertisements_enable(int enabled){ 3753 hci_stack->le_advertisements_enabled = enabled; 3754 if (enabled && !hci_stack->le_advertisements_active){ 3755 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3756 } 3757 if (!enabled && hci_stack->le_advertisements_active){ 3758 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3759 } 3760 hci_run(); 3761 } 3762 3763 #endif 3764 3765 void hci_le_set_own_address_type(uint8_t own_address_type){ 3766 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 3767 if (own_address_type == hci_stack->le_own_addr_type) return; 3768 hci_stack->le_own_addr_type = own_address_type; 3769 3770 #ifdef ENABLE_LE_PERIPHERAL 3771 // update advertisement parameters, too 3772 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3773 gap_advertisments_changed(); 3774 #endif 3775 #ifdef ENABLE_LE_CENTRAL 3776 // note: we don't update scan parameters or modify ongoing connection attempts 3777 #endif 3778 } 3779 3780 #endif 3781 3782 uint8_t gap_disconnect(hci_con_handle_t handle){ 3783 hci_connection_t * conn = hci_connection_for_handle(handle); 3784 if (!conn){ 3785 hci_emit_disconnection_complete(handle, 0); 3786 return 0; 3787 } 3788 conn->state = SEND_DISCONNECT; 3789 hci_run(); 3790 return 0; 3791 } 3792 3793 /** 3794 * @brief Get connection type 3795 * @param con_handle 3796 * @result connection_type 3797 */ 3798 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3799 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3800 if (!conn) return GAP_CONNECTION_INVALID; 3801 switch (conn->address_type){ 3802 case BD_ADDR_TYPE_LE_PUBLIC: 3803 case BD_ADDR_TYPE_LE_RANDOM: 3804 return GAP_CONNECTION_LE; 3805 case BD_ADDR_TYPE_SCO: 3806 return GAP_CONNECTION_SCO; 3807 case BD_ADDR_TYPE_CLASSIC: 3808 return GAP_CONNECTION_ACL; 3809 default: 3810 return GAP_CONNECTION_INVALID; 3811 } 3812 } 3813 3814 #ifdef ENABLE_BLE 3815 3816 #ifdef ENABLE_LE_CENTRAL 3817 /** 3818 * @brief Auto Connection Establishment - Start Connecting to device 3819 * @param address_typ 3820 * @param address 3821 * @returns 0 if ok 3822 */ 3823 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3824 // check capacity 3825 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 3826 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3827 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3828 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3829 entry->address_type = address_type; 3830 memcpy(entry->address, address, 6); 3831 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3832 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 3833 hci_run(); 3834 return 0; 3835 } 3836 3837 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3838 btstack_linked_list_iterator_t it; 3839 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3840 while (btstack_linked_list_iterator_has_next(&it)){ 3841 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3842 if (entry->address_type != address_type) continue; 3843 if (memcmp(entry->address, address, 6) != 0) continue; 3844 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3845 // remove from controller if already present 3846 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3847 continue; 3848 } 3849 // direclty remove entry from whitelist 3850 btstack_linked_list_iterator_remove(&it); 3851 btstack_memory_whitelist_entry_free(entry); 3852 } 3853 } 3854 3855 /** 3856 * @brief Auto Connection Establishment - Stop Connecting to device 3857 * @param address_typ 3858 * @param address 3859 * @returns 0 if ok 3860 */ 3861 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3862 hci_remove_from_whitelist(address_type, address); 3863 hci_run(); 3864 return 0; 3865 } 3866 3867 /** 3868 * @brief Auto Connection Establishment - Stop everything 3869 * @note Convenience function to stop all active auto connection attempts 3870 */ 3871 void gap_auto_connection_stop_all(void){ 3872 btstack_linked_list_iterator_t it; 3873 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3874 while (btstack_linked_list_iterator_has_next(&it)){ 3875 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3876 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3877 // remove from controller if already present 3878 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3879 continue; 3880 } 3881 // directly remove entry from whitelist 3882 btstack_linked_list_iterator_remove(&it); 3883 btstack_memory_whitelist_entry_free(entry); 3884 } 3885 hci_run(); 3886 } 3887 #endif 3888 #endif 3889 3890 #ifdef ENABLE_CLASSIC 3891 /** 3892 * @brief Set Extended Inquiry Response data 3893 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 3894 * @note has to be done before stack starts up 3895 */ 3896 void gap_set_extended_inquiry_response(const uint8_t * data){ 3897 hci_stack->eir_data = data; 3898 } 3899 3900 /** 3901 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 3902 * @param inquriy_mode see bluetooth_defines.h 3903 */ 3904 void hci_set_inquiry_mode(inquiry_mode_t mode){ 3905 hci_stack->inquiry_mode = mode; 3906 } 3907 3908 /** 3909 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3910 */ 3911 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3912 hci_stack->sco_voice_setting = voice_setting; 3913 } 3914 3915 /** 3916 * @brief Get SCO Voice Setting 3917 * @return current voice setting 3918 */ 3919 uint16_t hci_get_sco_voice_setting(void){ 3920 return hci_stack->sco_voice_setting; 3921 } 3922 3923 /** @brief Get SCO packet length for current SCO Voice setting 3924 * @note Using SCO packets of the exact length is required for USB transfer 3925 * @return Length of SCO packets in bytes (not audio frames) 3926 */ 3927 int hci_get_sco_packet_length(void){ 3928 // see Core Spec for H2 USB Transfer. 3929 if (hci_stack->sco_voice_setting & 0x0020) return 51; 3930 return 27; 3931 } 3932 #endif 3933 3934 /** 3935 * @brief Set callback for Bluetooth Hardware Error 3936 */ 3937 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 3938 hci_stack->hardware_error_callback = fn; 3939 } 3940 3941 void hci_disconnect_all(void){ 3942 btstack_linked_list_iterator_t it; 3943 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 3944 while (btstack_linked_list_iterator_has_next(&it)){ 3945 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 3946 if (con->state == SENT_DISCONNECT) continue; 3947 con->state = SEND_DISCONNECT; 3948 } 3949 hci_run(); 3950 } 3951 3952 uint16_t hci_get_manufacturer(void){ 3953 return hci_stack->manufacturer; 3954 } 3955