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