1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 /* 39 * hci.c 40 * 41 * Created by Matthias Ringwald on 4/29/09. 42 * 43 */ 44 45 #include "btstack_config.h" 46 47 48 #ifdef ENABLE_CLASSIC 49 #ifdef HAVE_EMBEDDED_TICK 50 #include "btstack_run_loop_embedded.h" 51 #endif 52 #endif 53 54 #ifdef HAVE_PLATFORM_IPHONE_OS 55 #include "../port/ios/src/btstack_control_iphone.h" 56 #endif 57 58 #ifdef ENABLE_BLE 59 #include "gap.h" 60 #endif 61 62 #include <stdarg.h> 63 #include <string.h> 64 #include <stdio.h> 65 #include <inttypes.h> 66 67 #include "btstack_debug.h" 68 #include "btstack_event.h" 69 #include "btstack_linked_list.h" 70 #include "btstack_memory.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 76 77 #define HCI_CONNECTION_TIMEOUT_MS 10000 78 #define HCI_RESET_RESEND_TIMEOUT_MS 200 79 80 // prototypes 81 #ifdef ENABLE_CLASSIC 82 static void hci_update_scan_enable(void); 83 static void hci_emit_discoverable_enabled(uint8_t enabled); 84 static int hci_local_ssp_activated(void); 85 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 86 static void hci_notify_if_sco_can_send_now(void); 87 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 88 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 89 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 90 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 91 static void hci_connection_timestamp(hci_connection_t *connection); 92 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 93 #endif 94 static int hci_power_control_on(void); 95 static void hci_power_control_off(void); 96 static void hci_state_reset(void); 97 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 98 static void hci_emit_nr_connections_changed(void); 99 static void hci_emit_hci_open_failed(void); 100 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 101 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 102 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 103 static void hci_run(void); 104 static int hci_is_le_connection(hci_connection_t * connection); 105 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 106 107 #ifdef ENABLE_BLE 108 #ifdef ENABLE_LE_CENTRAL 109 // called from test/ble_client/advertising_data_parser.c 110 void le_handle_advertisement_report(uint8_t *packet, int size); 111 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 112 #endif 113 #endif 114 115 // the STACK is here 116 #ifndef HAVE_MALLOC 117 static hci_stack_t hci_stack_static; 118 #endif 119 static hci_stack_t * hci_stack = NULL; 120 121 #ifdef ENABLE_CLASSIC 122 // test helper 123 static uint8_t disable_l2cap_timeouts = 0; 124 #endif 125 126 /** 127 * create connection for given address 128 * 129 * @return connection OR NULL, if no memory left 130 */ 131 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 132 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 133 hci_connection_t * conn = btstack_memory_hci_connection_get(); 134 if (!conn) return NULL; 135 memset(conn, 0, sizeof(hci_connection_t)); 136 bd_addr_copy(conn->address, addr); 137 conn->address_type = addr_type; 138 conn->con_handle = 0xffff; 139 conn->authentication_flags = AUTH_FLAGS_NONE; 140 conn->bonding_flags = 0; 141 conn->requested_security_level = LEVEL_0; 142 #ifdef ENABLE_CLASSIC 143 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 144 btstack_run_loop_set_timer_context(&conn->timeout, conn); 145 hci_connection_timestamp(conn); 146 #endif 147 conn->acl_recombination_length = 0; 148 conn->acl_recombination_pos = 0; 149 conn->num_acl_packets_sent = 0; 150 conn->num_sco_packets_sent = 0; 151 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 152 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 153 return conn; 154 } 155 156 157 /** 158 * get le connection parameter range 159 * 160 * @return le connection parameter range struct 161 */ 162 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 163 *range = hci_stack->le_connection_parameter_range; 164 } 165 166 /** 167 * set le connection parameter range 168 * 169 */ 170 171 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 172 hci_stack->le_connection_parameter_range = *range; 173 } 174 175 /** 176 * get hci connections iterator 177 * 178 * @return hci connections iterator 179 */ 180 181 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 182 btstack_linked_list_iterator_init(it, &hci_stack->connections); 183 } 184 185 /** 186 * get connection for a given handle 187 * 188 * @return connection OR NULL, if not found 189 */ 190 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 191 btstack_linked_list_iterator_t it; 192 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 193 while (btstack_linked_list_iterator_has_next(&it)){ 194 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 195 if ( item->con_handle == con_handle ) { 196 return item; 197 } 198 } 199 return NULL; 200 } 201 202 /** 203 * get connection for given address 204 * 205 * @return connection OR NULL, if not found 206 */ 207 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 208 btstack_linked_list_iterator_t it; 209 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 210 while (btstack_linked_list_iterator_has_next(&it)){ 211 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 212 if (connection->address_type != addr_type) continue; 213 if (memcmp(addr, connection->address, 6) != 0) continue; 214 return connection; 215 } 216 return NULL; 217 } 218 219 220 #ifdef ENABLE_CLASSIC 221 222 #ifdef ENABLE_SCO_OVER_HCI 223 static int hci_number_sco_connections(void){ 224 int connections = 0; 225 btstack_linked_list_iterator_t it; 226 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 227 while (btstack_linked_list_iterator_has_next(&it)){ 228 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 229 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 230 connections++; 231 } 232 return connections; 233 } 234 #endif 235 236 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 237 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 238 #ifdef HAVE_EMBEDDED_TICK 239 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 240 // connections might be timed out 241 hci_emit_l2cap_check_timeout(connection); 242 } 243 #else 244 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 245 // connections might be timed out 246 hci_emit_l2cap_check_timeout(connection); 247 } 248 #endif 249 } 250 251 static void hci_connection_timestamp(hci_connection_t *connection){ 252 #ifdef HAVE_EMBEDDED_TICK 253 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 254 #else 255 connection->timestamp = btstack_run_loop_get_time_ms(); 256 #endif 257 } 258 259 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 260 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 261 } 262 263 264 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 265 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 266 } 267 268 /** 269 * add authentication flags and reset timer 270 * @note: assumes classic connection 271 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 272 */ 273 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 274 bd_addr_t addr; 275 reverse_bd_addr(bd_addr, addr); 276 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 277 if (conn) { 278 connectionSetAuthenticationFlags(conn, flags); 279 hci_connection_timestamp(conn); 280 } 281 } 282 283 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 284 hci_connection_t * conn = hci_connection_for_handle(handle); 285 if (!conn) return 0; 286 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 287 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 288 return 0; 289 } 290 291 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 292 if (!hci_stack->link_key_db) return; 293 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 294 hci_stack->link_key_db->delete_link_key(addr); 295 } 296 297 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 298 if (!hci_stack->link_key_db) return; 299 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 300 hci_stack->link_key_db->put_link_key(addr, link_key, type); 301 } 302 #endif 303 304 static int hci_is_le_connection(hci_connection_t * connection){ 305 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 306 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 307 } 308 309 /** 310 * count connections 311 */ 312 static int nr_hci_connections(void){ 313 int count = 0; 314 btstack_linked_item_t *it; 315 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 316 return count; 317 } 318 319 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 320 321 unsigned int num_packets_sent_classic = 0; 322 unsigned int num_packets_sent_le = 0; 323 324 btstack_linked_item_t *it; 325 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 326 hci_connection_t * connection = (hci_connection_t *) it; 327 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 328 num_packets_sent_classic += connection->num_acl_packets_sent; 329 } else { 330 num_packets_sent_le += connection->num_acl_packets_sent; 331 } 332 } 333 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 334 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 335 int free_slots_le = 0; 336 337 if (free_slots_classic < 0){ 338 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 339 return 0; 340 } 341 342 if (hci_stack->le_acl_packets_total_num){ 343 // if we have LE slots, they are used 344 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 345 if (free_slots_le < 0){ 346 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 347 return 0; 348 } 349 } else { 350 // otherwise, classic slots are used for LE, too 351 free_slots_classic -= num_packets_sent_le; 352 if (free_slots_classic < 0){ 353 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 354 return 0; 355 } 356 } 357 358 switch (address_type){ 359 case BD_ADDR_TYPE_UNKNOWN: 360 log_error("hci_number_free_acl_slots: unknown address type"); 361 return 0; 362 363 case BD_ADDR_TYPE_CLASSIC: 364 return free_slots_classic; 365 366 default: 367 if (hci_stack->le_acl_packets_total_num){ 368 return free_slots_le; 369 } 370 return free_slots_classic; 371 } 372 } 373 374 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 375 // get connection type 376 hci_connection_t * connection = hci_connection_for_handle(con_handle); 377 if (!connection){ 378 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 379 return 0; 380 } 381 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 382 } 383 384 #ifdef ENABLE_CLASSIC 385 static int hci_number_free_sco_slots(void){ 386 unsigned int num_sco_packets_sent = 0; 387 btstack_linked_item_t *it; 388 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 389 hci_connection_t * connection = (hci_connection_t *) it; 390 num_sco_packets_sent += connection->num_sco_packets_sent; 391 } 392 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 393 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 394 return 0; 395 } 396 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 397 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 398 } 399 #endif 400 401 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 402 int hci_can_send_command_packet_now(void){ 403 if (hci_stack->hci_packet_buffer_reserved) return 0; 404 405 // check for async hci transport implementations 406 if (hci_stack->hci_transport->can_send_packet_now){ 407 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 408 return 0; 409 } 410 } 411 412 return hci_stack->num_cmd_packets > 0; 413 } 414 415 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 416 // check for async hci transport implementations 417 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 418 return hci_stack->hci_transport->can_send_packet_now(packet_type); 419 } 420 421 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 422 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 423 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 424 } 425 426 int hci_can_send_acl_le_packet_now(void){ 427 if (hci_stack->hci_packet_buffer_reserved) return 0; 428 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 429 } 430 431 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 432 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 433 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 434 } 435 436 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 437 if (hci_stack->hci_packet_buffer_reserved) return 0; 438 return hci_can_send_prepared_acl_packet_now(con_handle); 439 } 440 441 #ifdef ENABLE_CLASSIC 442 int hci_can_send_acl_classic_packet_now(void){ 443 if (hci_stack->hci_packet_buffer_reserved) return 0; 444 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 445 } 446 447 int hci_can_send_prepared_sco_packet_now(void){ 448 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 449 if (!hci_stack->synchronous_flow_control_enabled) return 1; 450 return hci_number_free_sco_slots() > 0; 451 } 452 453 int hci_can_send_sco_packet_now(void){ 454 if (hci_stack->hci_packet_buffer_reserved) return 0; 455 return hci_can_send_prepared_sco_packet_now(); 456 } 457 458 void hci_request_sco_can_send_now_event(void){ 459 hci_stack->sco_waiting_for_can_send_now = 1; 460 hci_notify_if_sco_can_send_now(); 461 } 462 #endif 463 464 // used for internal checks in l2cap.c 465 int hci_is_packet_buffer_reserved(void){ 466 return hci_stack->hci_packet_buffer_reserved; 467 } 468 469 // reserves outgoing packet buffer. @returns 1 if successful 470 int hci_reserve_packet_buffer(void){ 471 if (hci_stack->hci_packet_buffer_reserved) { 472 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 473 return 0; 474 } 475 hci_stack->hci_packet_buffer_reserved = 1; 476 return 1; 477 } 478 479 void hci_release_packet_buffer(void){ 480 hci_stack->hci_packet_buffer_reserved = 0; 481 } 482 483 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 484 static int hci_transport_synchronous(void){ 485 return hci_stack->hci_transport->can_send_packet_now == NULL; 486 } 487 488 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 489 490 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 491 492 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 493 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 494 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 495 max_acl_data_packet_length = hci_stack->le_data_packets_length; 496 } 497 498 // testing: reduce buffer to minimum 499 // max_acl_data_packet_length = 52; 500 501 log_debug("hci_send_acl_packet_fragments entered"); 502 503 int err; 504 // multiple packets could be send on a synchronous HCI transport 505 while (1){ 506 507 log_debug("hci_send_acl_packet_fragments loop entered"); 508 509 // get current data 510 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 511 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 512 int more_fragments = 0; 513 514 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 515 if (current_acl_data_packet_length > max_acl_data_packet_length){ 516 more_fragments = 1; 517 current_acl_data_packet_length = max_acl_data_packet_length; 518 } 519 520 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 521 if (acl_header_pos > 0){ 522 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 523 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 524 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 525 } 526 527 // update header len 528 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 529 530 // count packet 531 connection->num_acl_packets_sent++; 532 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 533 534 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 535 if (more_fragments){ 536 // update start of next fragment to send 537 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 538 } else { 539 // done 540 hci_stack->acl_fragmentation_pos = 0; 541 hci_stack->acl_fragmentation_total_size = 0; 542 } 543 544 // send packet 545 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 546 const int size = current_acl_data_packet_length + 4; 547 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 548 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 549 550 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 551 552 // done yet? 553 if (!more_fragments) break; 554 555 // can send more? 556 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 557 } 558 559 log_debug("hci_send_acl_packet_fragments loop over"); 560 561 // release buffer now for synchronous transport 562 if (hci_transport_synchronous()){ 563 hci_release_packet_buffer(); 564 // notify upper stack that it might be possible to send again 565 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 566 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 567 } 568 569 return err; 570 } 571 572 // pre: caller has reserved the packet buffer 573 int hci_send_acl_packet_buffer(int size){ 574 575 // log_info("hci_send_acl_packet_buffer size %u", size); 576 577 if (!hci_stack->hci_packet_buffer_reserved) { 578 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 579 return 0; 580 } 581 582 uint8_t * packet = hci_stack->hci_packet_buffer; 583 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 584 585 // check for free places on Bluetooth module 586 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 587 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 588 hci_release_packet_buffer(); 589 return BTSTACK_ACL_BUFFERS_FULL; 590 } 591 592 hci_connection_t *connection = hci_connection_for_handle( con_handle); 593 if (!connection) { 594 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 595 hci_release_packet_buffer(); 596 return 0; 597 } 598 599 #ifdef ENABLE_CLASSIC 600 hci_connection_timestamp(connection); 601 #endif 602 603 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 604 605 // setup data 606 hci_stack->acl_fragmentation_total_size = size; 607 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 608 609 return hci_send_acl_packet_fragments(connection); 610 } 611 612 #ifdef ENABLE_CLASSIC 613 // pre: caller has reserved the packet buffer 614 int hci_send_sco_packet_buffer(int size){ 615 616 // log_info("hci_send_acl_packet_buffer size %u", size); 617 618 if (!hci_stack->hci_packet_buffer_reserved) { 619 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 620 return 0; 621 } 622 623 uint8_t * packet = hci_stack->hci_packet_buffer; 624 625 // skip checks in loopback mode 626 if (!hci_stack->loopback_mode){ 627 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 628 629 // check for free places on Bluetooth module 630 if (!hci_can_send_prepared_sco_packet_now()) { 631 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 632 hci_release_packet_buffer(); 633 return BTSTACK_ACL_BUFFERS_FULL; 634 } 635 636 // track send packet in connection struct 637 hci_connection_t *connection = hci_connection_for_handle( con_handle); 638 if (!connection) { 639 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 640 hci_release_packet_buffer(); 641 return 0; 642 } 643 connection->num_sco_packets_sent++; 644 } 645 646 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 647 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 648 649 if (hci_transport_synchronous()){ 650 hci_release_packet_buffer(); 651 // notify upper stack that it might be possible to send again 652 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 653 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 654 } 655 656 return err; 657 } 658 #endif 659 660 static void acl_handler(uint8_t *packet, int size){ 661 662 // log_info("acl_handler: size %u", size); 663 664 // get info 665 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 666 hci_connection_t *conn = hci_connection_for_handle(con_handle); 667 uint8_t acl_flags = READ_ACL_FLAGS(packet); 668 uint16_t acl_length = READ_ACL_LENGTH(packet); 669 670 // ignore non-registered handle 671 if (!conn){ 672 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 673 return; 674 } 675 676 // assert packet is complete 677 if (acl_length + 4 != size){ 678 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 679 return; 680 } 681 682 #ifdef ENABLE_CLASSIC 683 // update idle timestamp 684 hci_connection_timestamp(conn); 685 #endif 686 687 // handle different packet types 688 switch (acl_flags & 0x03) { 689 690 case 0x01: // continuation fragment 691 692 // sanity checks 693 if (conn->acl_recombination_pos == 0) { 694 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 695 return; 696 } 697 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 698 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 699 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 700 conn->acl_recombination_pos = 0; 701 return; 702 } 703 704 // append fragment payload (header already stored) 705 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 706 conn->acl_recombination_pos += acl_length; 707 708 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 709 // conn->acl_recombination_pos, conn->acl_recombination_length); 710 711 // forward complete L2CAP packet if complete. 712 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 713 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 714 // reset recombination buffer 715 conn->acl_recombination_length = 0; 716 conn->acl_recombination_pos = 0; 717 } 718 break; 719 720 case 0x02: { // first fragment 721 722 // sanity check 723 if (conn->acl_recombination_pos) { 724 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 725 conn->acl_recombination_pos = 0; 726 } 727 728 // peek into L2CAP packet! 729 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 730 731 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 732 733 // compare fragment size to L2CAP packet size 734 if (acl_length >= l2cap_length + 4){ 735 // forward fragment as L2CAP packet 736 hci_emit_acl_packet(packet, acl_length + 4); 737 } else { 738 739 if (acl_length > HCI_ACL_BUFFER_SIZE){ 740 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 741 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 742 return; 743 } 744 745 // store first fragment and tweak acl length for complete package 746 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 747 conn->acl_recombination_pos = acl_length + 4; 748 conn->acl_recombination_length = l2cap_length; 749 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 750 } 751 break; 752 753 } 754 default: 755 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 756 return; 757 } 758 759 // execute main loop 760 hci_run(); 761 } 762 763 static void hci_shutdown_connection(hci_connection_t *conn){ 764 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 765 766 #ifdef ENABLE_SCO_OVER_HCI 767 int addr_type = conn->address_type; 768 #endif 769 770 btstack_run_loop_remove_timer(&conn->timeout); 771 772 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 773 btstack_memory_hci_connection_free( conn ); 774 775 // now it's gone 776 hci_emit_nr_connections_changed(); 777 778 #ifdef ENABLE_SCO_OVER_HCI 779 // update SCO 780 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 781 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 782 } 783 #endif 784 } 785 786 #ifdef ENABLE_CLASSIC 787 788 static const uint16_t packet_type_sizes[] = { 789 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 790 HCI_ACL_DH1_SIZE, 0, 0, 0, 791 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 792 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 793 }; 794 static const uint8_t packet_type_feature_requirement_bit[] = { 795 0, // 3 slot packets 796 1, // 5 slot packets 797 25, // EDR 2 mpbs 798 26, // EDR 3 mbps 799 39, // 3 slot EDR packts 800 40, // 5 slot EDR packet 801 }; 802 static const uint16_t packet_type_feature_packet_mask[] = { 803 0x0f00, // 3 slot packets 804 0xf000, // 5 slot packets 805 0x1102, // EDR 2 mpbs 806 0x2204, // EDR 3 mbps 807 0x0300, // 3 slot EDR packts 808 0x3000, // 5 slot EDR packet 809 }; 810 811 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 812 // enable packet types based on size 813 uint16_t packet_types = 0; 814 unsigned int i; 815 for (i=0;i<16;i++){ 816 if (packet_type_sizes[i] == 0) continue; 817 if (packet_type_sizes[i] <= buffer_size){ 818 packet_types |= 1 << i; 819 } 820 } 821 // disable packet types due to missing local supported features 822 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 823 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 824 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 825 if (feature_set) continue; 826 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 827 packet_types &= ~packet_type_feature_packet_mask[i]; 828 } 829 // flip bits for "may not be used" 830 packet_types ^= 0x3306; 831 return packet_types; 832 } 833 834 uint16_t hci_usable_acl_packet_types(void){ 835 return hci_stack->packet_types; 836 } 837 #endif 838 839 uint8_t* hci_get_outgoing_packet_buffer(void){ 840 // hci packet buffer is >= acl data packet length 841 return hci_stack->hci_packet_buffer; 842 } 843 844 uint16_t hci_max_acl_data_packet_length(void){ 845 return hci_stack->acl_data_packet_length; 846 } 847 848 #ifdef ENABLE_CLASSIC 849 int hci_extended_sco_link_supported(void){ 850 // No. 31, byte 3, bit 7 851 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 852 } 853 #endif 854 855 int hci_non_flushable_packet_boundary_flag_supported(void){ 856 // No. 54, byte 6, bit 6 857 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 858 } 859 860 static int gap_ssp_supported(void){ 861 // No. 51, byte 6, bit 3 862 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 863 } 864 865 static int hci_classic_supported(void){ 866 #ifdef ENABLE_CLASSIC 867 // No. 37, byte 4, bit 5, = No BR/EDR Support 868 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 869 #else 870 return 0; 871 #endif 872 } 873 874 static int hci_le_supported(void){ 875 #ifdef ENABLE_BLE 876 // No. 37, byte 4, bit 6 = LE Supported (Controller) 877 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 878 #else 879 return 0; 880 #endif 881 } 882 883 #ifdef ENABLE_BLE 884 885 /** 886 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 887 */ 888 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 889 *addr_type = hci_stack->le_own_addr_type; 890 if (hci_stack->le_own_addr_type){ 891 memcpy(addr, hci_stack->le_random_address, 6); 892 } else { 893 memcpy(addr, hci_stack->local_bd_addr, 6); 894 } 895 } 896 897 #ifdef ENABLE_LE_CENTRAL 898 void le_handle_advertisement_report(uint8_t *packet, int size){ 899 900 UNUSED(size); 901 902 int offset = 3; 903 int num_reports = packet[offset]; 904 offset += 1; 905 906 int i; 907 // log_info("HCI: handle adv report with num reports: %d", num_reports); 908 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 909 for (i=0; i<num_reports;i++){ 910 uint8_t data_length = packet[offset + 8]; 911 uint8_t event_size = 10 + data_length; 912 int pos = 0; 913 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 914 event[pos++] = event_size; 915 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 916 offset += 8; 917 pos += 8; 918 event[pos++] = packet[offset + 1 + data_length]; // rssi 919 event[pos++] = packet[offset++]; //data_length; 920 memcpy(&event[pos], &packet[offset], data_length); 921 pos += data_length; 922 offset += data_length + 1; // rssi 923 hci_emit_event(event, pos, 1); 924 } 925 } 926 #endif 927 #endif 928 929 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 930 931 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 932 if (!hci_stack->config) return 0; 933 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 934 // Limit baud rate for Broadcom chipsets to 3 mbps 935 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 936 baud_rate = 3000000; 937 } 938 return baud_rate; 939 } 940 941 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 942 UNUSED(ds); 943 944 switch (hci_stack->substate){ 945 case HCI_INIT_W4_SEND_RESET: 946 log_info("Resend HCI Reset"); 947 hci_stack->substate = HCI_INIT_SEND_RESET; 948 hci_stack->num_cmd_packets = 1; 949 hci_run(); 950 break; 951 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 952 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 953 if (hci_stack->hci_transport->reset_link){ 954 hci_stack->hci_transport->reset_link(); 955 } 956 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 957 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 958 log_info("Resend HCI Reset - CSR Warm Boot"); 959 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 960 hci_stack->num_cmd_packets = 1; 961 hci_run(); 962 break; 963 case HCI_INIT_W4_SEND_BAUD_CHANGE: 964 if (hci_stack->hci_transport->set_baudrate){ 965 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 966 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 967 hci_stack->hci_transport->set_baudrate(baud_rate); 968 } 969 // For CSR, HCI Reset is sent on new baud rate 970 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 971 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 972 hci_run(); 973 } 974 break; 975 default: 976 break; 977 } 978 } 979 #endif 980 981 static void hci_initializing_next_state(void){ 982 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 983 } 984 985 // assumption: hci_can_send_command_packet_now() == true 986 static void hci_initializing_run(void){ 987 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 988 switch (hci_stack->substate){ 989 case HCI_INIT_SEND_RESET: 990 hci_state_reset(); 991 992 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 993 // prepare reset if command complete not received in 100ms 994 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 995 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 996 btstack_run_loop_add_timer(&hci_stack->timeout); 997 #endif 998 // send command 999 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1000 hci_send_cmd(&hci_reset); 1001 break; 1002 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1003 hci_send_cmd(&hci_read_local_version_information); 1004 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1005 break; 1006 case HCI_INIT_SEND_READ_LOCAL_NAME: 1007 hci_send_cmd(&hci_read_local_name); 1008 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1009 break; 1010 1011 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1012 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1013 hci_state_reset(); 1014 // prepare reset if command complete not received in 100ms 1015 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1016 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1017 btstack_run_loop_add_timer(&hci_stack->timeout); 1018 // send command 1019 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1020 hci_send_cmd(&hci_reset); 1021 break; 1022 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1023 hci_state_reset(); 1024 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1025 hci_send_cmd(&hci_reset); 1026 break; 1027 case HCI_INIT_SEND_BAUD_CHANGE: { 1028 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1029 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1030 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1031 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1032 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1033 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1034 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1035 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1036 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1037 btstack_run_loop_add_timer(&hci_stack->timeout); 1038 } 1039 break; 1040 } 1041 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1042 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1043 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1044 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1045 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1046 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1047 break; 1048 } 1049 case HCI_INIT_CUSTOM_INIT: 1050 // Custom initialization 1051 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1052 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1053 if (valid_cmd){ 1054 int size = 3 + hci_stack->hci_packet_buffer[2]; 1055 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1056 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1057 switch (valid_cmd) { 1058 case 1: 1059 default: 1060 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1061 break; 1062 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1063 log_info("CSR Warm Boot"); 1064 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1065 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1066 btstack_run_loop_add_timer(&hci_stack->timeout); 1067 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1068 && hci_stack->config 1069 && hci_stack->chipset 1070 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1071 && hci_stack->hci_transport->set_baudrate 1072 && hci_transport_uart_get_main_baud_rate()){ 1073 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1074 } else { 1075 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1076 } 1077 break; 1078 } 1079 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1080 break; 1081 } 1082 log_info("Init script done"); 1083 1084 // Init script download causes baud rate to reset on Broadcom chipsets, restore UART baud rate if needed 1085 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1086 int need_baud_change = hci_stack->config 1087 && hci_stack->chipset 1088 && hci_stack->chipset->set_baudrate_command 1089 && hci_stack->hci_transport->set_baudrate 1090 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1091 if (need_baud_change) { 1092 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1093 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1094 hci_stack->hci_transport->set_baudrate(baud_rate); 1095 } 1096 } 1097 } 1098 // otherwise continue 1099 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1100 hci_send_cmd(&hci_read_local_supported_commands); 1101 break; 1102 case HCI_INIT_SET_BD_ADDR: 1103 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1104 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1105 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1106 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1107 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1108 break; 1109 #endif 1110 1111 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1112 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1113 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1114 hci_send_cmd(&hci_read_local_supported_commands); 1115 break; 1116 case HCI_INIT_READ_BD_ADDR: 1117 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1118 hci_send_cmd(&hci_read_bd_addr); 1119 break; 1120 case HCI_INIT_READ_BUFFER_SIZE: 1121 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1122 hci_send_cmd(&hci_read_buffer_size); 1123 break; 1124 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1125 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1126 hci_send_cmd(&hci_read_local_supported_features); 1127 break; 1128 case HCI_INIT_SET_EVENT_MASK: 1129 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1130 if (hci_le_supported()){ 1131 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1132 } else { 1133 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1134 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1135 } 1136 break; 1137 #ifdef ENABLE_CLASSIC 1138 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1139 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1140 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1141 break; 1142 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1143 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1144 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1145 break; 1146 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1147 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1148 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1149 break; 1150 case HCI_INIT_WRITE_LOCAL_NAME: 1151 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1152 if (hci_stack->local_name){ 1153 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1154 } else { 1155 char local_name[8+17+1]; 1156 // BTstack 11:22:33:44:55:66 1157 memcpy(local_name, "BTstack ", 8); 1158 memcpy(&local_name[8], bd_addr_to_str(hci_stack->local_bd_addr), 17); // strlen(bd_addr_to_str(...)) = 17 1159 local_name[8+17] = '\0'; 1160 log_info("---> Name %s", local_name); 1161 hci_send_cmd(&hci_write_local_name, local_name); 1162 } 1163 break; 1164 case HCI_INIT_WRITE_EIR_DATA: 1165 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1166 hci_send_cmd(&hci_write_extended_inquiry_response, 0, hci_stack->eir_data); 1167 break; 1168 case HCI_INIT_WRITE_INQUIRY_MODE: 1169 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1170 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1171 break; 1172 case HCI_INIT_WRITE_SCAN_ENABLE: 1173 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1174 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1175 break; 1176 // only sent if ENABLE_SCO_OVER_HCI is defined 1177 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1178 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1179 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1180 break; 1181 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1182 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1183 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1184 break; 1185 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1186 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1187 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1188 log_info("BCM: Route SCO data via HCI transport"); 1189 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1190 break; 1191 1192 #endif 1193 #ifdef ENABLE_BLE 1194 // LE INIT 1195 case HCI_INIT_LE_READ_BUFFER_SIZE: 1196 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1197 hci_send_cmd(&hci_le_read_buffer_size); 1198 break; 1199 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1200 // LE Supported Host = 1, Simultaneous Host = 0 1201 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1202 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1203 break; 1204 #ifdef ENABLE_LE_CENTRAL 1205 case HCI_INIT_READ_WHITE_LIST_SIZE: 1206 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1207 hci_send_cmd(&hci_le_read_white_list_size); 1208 break; 1209 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1210 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1211 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1212 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1213 break; 1214 #endif 1215 #endif 1216 default: 1217 return; 1218 } 1219 } 1220 1221 static void hci_init_done(void){ 1222 // done. tell the app 1223 log_info("hci_init_done -> HCI_STATE_WORKING"); 1224 hci_stack->state = HCI_STATE_WORKING; 1225 hci_emit_state(); 1226 hci_run(); 1227 } 1228 1229 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1230 UNUSED(size); 1231 1232 uint8_t command_completed = 0; 1233 1234 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1235 uint16_t opcode = little_endian_read_16(packet,3); 1236 if (opcode == hci_stack->last_cmd_opcode){ 1237 command_completed = 1; 1238 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1239 } else { 1240 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1241 } 1242 } 1243 1244 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1245 uint8_t status = packet[2]; 1246 uint16_t opcode = little_endian_read_16(packet,4); 1247 if (opcode == hci_stack->last_cmd_opcode){ 1248 if (status){ 1249 command_completed = 1; 1250 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1251 } else { 1252 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1253 } 1254 } else { 1255 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1256 } 1257 } 1258 1259 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1260 1261 // Vendor == CSR 1262 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1263 // TODO: track actual command 1264 command_completed = 1; 1265 } 1266 1267 // Vendor == Toshiba 1268 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1269 // TODO: track actual command 1270 command_completed = 1; 1271 } 1272 1273 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1274 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1275 // 1276 // HCI Reset 1277 // Timeout 100 ms 1278 // HCI Reset 1279 // Command Complete Reset 1280 // HCI Read Local Version Information 1281 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1282 // hang... 1283 // 1284 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1285 if (!command_completed 1286 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1287 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1288 1289 uint16_t opcode = little_endian_read_16(packet,3); 1290 if (opcode == hci_reset.opcode){ 1291 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1292 return; 1293 } 1294 } 1295 1296 // CSR & H5 1297 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1298 if (!command_completed 1299 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1300 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1301 1302 uint16_t opcode = little_endian_read_16(packet,3); 1303 if (opcode == hci_reset.opcode){ 1304 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1305 return; 1306 } 1307 } 1308 1309 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1310 // fix: Correct substate and behave as command below 1311 if (command_completed){ 1312 switch (hci_stack->substate){ 1313 case HCI_INIT_SEND_RESET: 1314 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1315 break; 1316 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1317 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1318 break; 1319 default: 1320 break; 1321 } 1322 } 1323 1324 #endif 1325 1326 if (!command_completed) return; 1327 1328 int need_baud_change = 0; 1329 int need_addr_change = 0; 1330 1331 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1332 need_baud_change = hci_stack->config 1333 && hci_stack->chipset 1334 && hci_stack->chipset->set_baudrate_command 1335 && hci_stack->hci_transport->set_baudrate 1336 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1337 1338 need_addr_change = hci_stack->custom_bd_addr_set 1339 && hci_stack->chipset 1340 && hci_stack->chipset->set_bd_addr_command; 1341 #endif 1342 1343 switch(hci_stack->substate){ 1344 1345 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1346 case HCI_INIT_SEND_RESET: 1347 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1348 // fix: just correct substate and behave as command below 1349 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1350 btstack_run_loop_remove_timer(&hci_stack->timeout); 1351 break; 1352 case HCI_INIT_W4_SEND_RESET: 1353 btstack_run_loop_remove_timer(&hci_stack->timeout); 1354 break; 1355 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1356 log_info("Received local name, need baud change %d", need_baud_change); 1357 if (need_baud_change){ 1358 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1359 return; 1360 } 1361 // skip baud change 1362 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1363 return; 1364 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1365 // for STLC2500D, baud rate change already happened. 1366 // for others, baud rate gets changed now 1367 if ((hci_stack->manufacturer != COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1368 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1369 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1370 hci_stack->hci_transport->set_baudrate(baud_rate); 1371 } 1372 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1373 return; 1374 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1375 btstack_run_loop_remove_timer(&hci_stack->timeout); 1376 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1377 return; 1378 case HCI_INIT_W4_CUSTOM_INIT: 1379 // repeat custom init 1380 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1381 return; 1382 #else 1383 case HCI_INIT_W4_SEND_RESET: 1384 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1385 return ; 1386 #endif 1387 1388 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1389 if (need_baud_change && hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1390 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1391 return; 1392 } 1393 if (need_addr_change){ 1394 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1395 return; 1396 } 1397 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1398 return; 1399 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1400 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1401 if (need_baud_change){ 1402 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1403 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1404 hci_stack->hci_transport->set_baudrate(baud_rate); 1405 } 1406 if (need_addr_change){ 1407 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1408 return; 1409 } 1410 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1411 return; 1412 case HCI_INIT_W4_SET_BD_ADDR: 1413 // for STLC2500D, bd addr change only gets active after sending reset command 1414 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1415 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1416 return; 1417 } 1418 // skipping st warm boot 1419 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1420 return; 1421 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1422 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1423 return; 1424 #endif 1425 case HCI_INIT_W4_READ_BD_ADDR: 1426 // only read buffer size if supported 1427 if (hci_stack->local_supported_commands[0] & 0x01) { 1428 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1429 return; 1430 } 1431 // skipping read buffer size 1432 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1433 return; 1434 case HCI_INIT_W4_SET_EVENT_MASK: 1435 // skip Classic init commands for LE only chipsets 1436 if (!hci_classic_supported()){ 1437 #ifdef ENABLE_BLE 1438 if (hci_le_supported()){ 1439 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1440 return; 1441 } 1442 #endif 1443 log_error("Neither BR/EDR nor LE supported"); 1444 hci_init_done(); 1445 return; 1446 } 1447 if (!gap_ssp_supported()){ 1448 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1449 return; 1450 } 1451 break; 1452 #ifdef ENABLE_BLE 1453 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1454 // skip write le host if not supported (e.g. on LE only EM9301) 1455 if (hci_stack->local_supported_commands[0] & 0x02) break; 1456 #ifdef ENABLE_LE_CENTRAL 1457 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1458 #else 1459 hci_init_done(); 1460 #endif 1461 return; 1462 #endif 1463 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1464 // skip write eir data if no eir data set 1465 if (hci_stack->eir_data) break; 1466 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1467 return; 1468 1469 #ifdef ENABLE_SCO_OVER_HCI 1470 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1471 // skip write synchronous flow control if not supported 1472 if (hci_stack->local_supported_commands[0] & 0x04) break; 1473 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1474 // explicit fall through to reduce repetitions 1475 1476 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1477 // skip write default erroneous data reporting if not supported 1478 if (hci_stack->local_supported_commands[0] & 0x08) break; 1479 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1480 // explicit fall through to reduce repetitions 1481 1482 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1483 // skip bcm set sco pcm config on non-Broadcom chipsets 1484 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION) break; 1485 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1486 // explicit fall through to reduce repetitions 1487 1488 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1489 if (!hci_le_supported()){ 1490 // SKIP LE init for Classic only configuration 1491 hci_init_done(); 1492 return; 1493 } 1494 break; 1495 #else 1496 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1497 if (!hci_le_supported()){ 1498 // SKIP LE init for Classic only configuration 1499 hci_init_done(); 1500 return; 1501 } 1502 #endif 1503 break; 1504 // Response to command before init done state -> init done 1505 case (HCI_INIT_DONE-1): 1506 hci_init_done(); 1507 return; 1508 1509 default: 1510 break; 1511 } 1512 hci_initializing_next_state(); 1513 } 1514 1515 static void event_handler(uint8_t *packet, int size){ 1516 1517 uint16_t event_length = packet[1]; 1518 1519 // assert packet is complete 1520 if (size != event_length + 2){ 1521 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1522 return; 1523 } 1524 1525 bd_addr_t addr; 1526 bd_addr_type_t addr_type; 1527 uint8_t link_type; 1528 hci_con_handle_t handle; 1529 hci_connection_t * conn; 1530 int i; 1531 1532 // warnings 1533 (void) link_type; 1534 1535 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1536 1537 switch (hci_event_packet_get_type(packet)) { 1538 1539 case HCI_EVENT_COMMAND_COMPLETE: 1540 // get num cmd packets - limit to 1 to reduce complexity 1541 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1542 1543 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1544 if (packet[5]) break; 1545 // terminate, name 248 chars 1546 packet[6+248] = 0; 1547 log_info("local name: %s", &packet[6]); 1548 } 1549 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1550 // from offset 5 1551 // status 1552 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1553 hci_stack->acl_data_packet_length = little_endian_read_16(packet, 6); 1554 hci_stack->sco_data_packet_length = packet[8]; 1555 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1556 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1557 1558 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1559 // determine usable ACL payload size 1560 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1561 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1562 } 1563 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1564 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1565 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1566 } 1567 } 1568 #ifdef ENABLE_BLE 1569 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1570 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1571 hci_stack->le_acl_packets_total_num = packet[8]; 1572 // determine usable ACL payload size 1573 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1574 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1575 } 1576 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1577 } 1578 #ifdef ENABLE_LE_CENTRAL 1579 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1580 hci_stack->le_whitelist_capacity = packet[6]; 1581 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1582 } 1583 #endif 1584 #endif 1585 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1586 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1587 hci_stack->local_bd_addr); 1588 log_info("Local Address, Status: 0x%02x: Addr: %s", 1589 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1590 #ifdef ENABLE_CLASSIC 1591 if (hci_stack->link_key_db){ 1592 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1593 } 1594 #endif 1595 } 1596 #ifdef ENABLE_CLASSIC 1597 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1598 hci_emit_discoverable_enabled(hci_stack->discoverable); 1599 } 1600 #endif 1601 1602 // Note: HCI init checks 1603 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1604 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1605 1606 #ifdef ENABLE_CLASSIC 1607 // determine usable ACL packet types based on host buffer size and supported features 1608 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1609 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1610 #endif 1611 // Classic/LE 1612 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1613 } 1614 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1615 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1616 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1617 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1618 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1619 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1620 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1621 } 1622 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1623 hci_stack->local_supported_commands[0] = 1624 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1625 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1626 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1627 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08); // bit 3 = Octet 18, bit 3 1628 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1629 } 1630 #ifdef ENABLE_CLASSIC 1631 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1632 if (packet[5] == 0){ 1633 hci_stack->synchronous_flow_control_enabled = 1; 1634 } 1635 } 1636 #endif 1637 break; 1638 1639 case HCI_EVENT_COMMAND_STATUS: 1640 // get num cmd packets - limit to 1 to reduce complexity 1641 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1642 break; 1643 1644 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1645 int offset = 3; 1646 for (i=0; i<packet[2];i++){ 1647 handle = little_endian_read_16(packet, offset); 1648 offset += 2; 1649 uint16_t num_packets = little_endian_read_16(packet, offset); 1650 offset += 2; 1651 1652 conn = hci_connection_for_handle(handle); 1653 if (!conn){ 1654 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1655 continue; 1656 } 1657 1658 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1659 #ifdef ENABLE_CLASSIC 1660 if (conn->num_sco_packets_sent >= num_packets){ 1661 conn->num_sco_packets_sent -= num_packets; 1662 } else { 1663 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1664 conn->num_sco_packets_sent = 0; 1665 } 1666 hci_notify_if_sco_can_send_now(); 1667 #endif 1668 } else { 1669 if (conn->num_acl_packets_sent >= num_packets){ 1670 conn->num_acl_packets_sent -= num_packets; 1671 } else { 1672 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1673 conn->num_acl_packets_sent = 0; 1674 } 1675 } 1676 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1677 } 1678 break; 1679 } 1680 1681 #ifdef ENABLE_CLASSIC 1682 case HCI_EVENT_CONNECTION_REQUEST: 1683 reverse_bd_addr(&packet[2], addr); 1684 // TODO: eval COD 8-10 1685 link_type = packet[11]; 1686 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1687 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1688 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1689 if (!conn) { 1690 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1691 } 1692 if (!conn) { 1693 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1694 hci_stack->decline_reason = 0x0d; 1695 bd_addr_copy(hci_stack->decline_addr, addr); 1696 break; 1697 } 1698 conn->role = HCI_ROLE_SLAVE; 1699 conn->state = RECEIVED_CONNECTION_REQUEST; 1700 // store info about eSCO 1701 if (link_type == 0x02){ 1702 conn->remote_supported_feature_eSCO = 1; 1703 } 1704 hci_run(); 1705 break; 1706 1707 case HCI_EVENT_CONNECTION_COMPLETE: 1708 // Connection management 1709 reverse_bd_addr(&packet[5], addr); 1710 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1711 addr_type = BD_ADDR_TYPE_CLASSIC; 1712 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1713 if (conn) { 1714 if (!packet[2]){ 1715 conn->state = OPEN; 1716 conn->con_handle = little_endian_read_16(packet, 3); 1717 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1718 1719 // restart timer 1720 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1721 btstack_run_loop_add_timer(&conn->timeout); 1722 1723 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1724 1725 hci_emit_nr_connections_changed(); 1726 } else { 1727 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1728 uint8_t status = packet[2]; 1729 bd_addr_t bd_address; 1730 memcpy(&bd_address, conn->address, 6); 1731 1732 // connection failed, remove entry 1733 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1734 btstack_memory_hci_connection_free( conn ); 1735 1736 // notify client if dedicated bonding 1737 if (notify_dedicated_bonding_failed){ 1738 log_info("hci notify_dedicated_bonding_failed"); 1739 hci_emit_dedicated_bonding_result(bd_address, status); 1740 } 1741 1742 // if authentication error, also delete link key 1743 if (packet[2] == 0x05) { 1744 gap_drop_link_key_for_bd_addr(addr); 1745 } 1746 } 1747 } 1748 break; 1749 1750 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1751 reverse_bd_addr(&packet[5], addr); 1752 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1753 if (packet[2]){ 1754 // connection failed 1755 break; 1756 } 1757 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1758 if (!conn) { 1759 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1760 } 1761 if (!conn) { 1762 break; 1763 } 1764 conn->state = OPEN; 1765 conn->con_handle = little_endian_read_16(packet, 3); 1766 1767 #ifdef ENABLE_SCO_OVER_HCI 1768 // update SCO 1769 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 1770 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1771 } 1772 #endif 1773 break; 1774 1775 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1776 handle = little_endian_read_16(packet, 3); 1777 conn = hci_connection_for_handle(handle); 1778 if (!conn) break; 1779 if (!packet[2]){ 1780 uint8_t * features = &packet[5]; 1781 if (features[6] & (1 << 3)){ 1782 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1783 } 1784 if (features[3] & (1<<7)){ 1785 conn->remote_supported_feature_eSCO = 1; 1786 } 1787 } 1788 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1789 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1790 if (conn->bonding_flags & BONDING_DEDICATED){ 1791 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1792 } 1793 break; 1794 1795 case HCI_EVENT_LINK_KEY_REQUEST: 1796 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1797 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1798 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1799 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1800 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1801 hci_run(); 1802 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1803 return; 1804 1805 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1806 reverse_bd_addr(&packet[2], addr); 1807 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1808 if (!conn) break; 1809 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1810 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1811 // Change Connection Encryption keeps link key type 1812 if (link_key_type != CHANGED_COMBINATION_KEY){ 1813 conn->link_key_type = link_key_type; 1814 } 1815 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1816 // still forward event to allow dismiss of pairing dialog 1817 break; 1818 } 1819 1820 case HCI_EVENT_PIN_CODE_REQUEST: 1821 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1822 // non-bondable mode: pin code negative reply will be sent 1823 if (!hci_stack->bondable){ 1824 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1825 hci_run(); 1826 return; 1827 } 1828 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1829 if (!hci_stack->link_key_db) break; 1830 hci_event_pin_code_request_get_bd_addr(packet, addr); 1831 hci_stack->link_key_db->delete_link_key(addr); 1832 break; 1833 1834 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1835 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1836 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1837 break; 1838 1839 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1840 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1841 if (!hci_stack->ssp_auto_accept) break; 1842 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1843 break; 1844 1845 case HCI_EVENT_USER_PASSKEY_REQUEST: 1846 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1847 if (!hci_stack->ssp_auto_accept) break; 1848 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1849 break; 1850 #endif 1851 1852 case HCI_EVENT_ENCRYPTION_CHANGE: 1853 handle = little_endian_read_16(packet, 3); 1854 conn = hci_connection_for_handle(handle); 1855 if (!conn) break; 1856 if (packet[2] == 0) { 1857 if (packet[5]){ 1858 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1859 } else { 1860 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1861 } 1862 } 1863 #ifdef ENABLE_CLASSIC 1864 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1865 #endif 1866 break; 1867 1868 #ifdef ENABLE_CLASSIC 1869 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1870 handle = little_endian_read_16(packet, 3); 1871 conn = hci_connection_for_handle(handle); 1872 if (!conn) break; 1873 1874 // dedicated bonding: send result and disconnect 1875 if (conn->bonding_flags & BONDING_DEDICATED){ 1876 conn->bonding_flags &= ~BONDING_DEDICATED; 1877 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1878 conn->bonding_status = packet[2]; 1879 break; 1880 } 1881 1882 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1883 // link key sufficient for requested security 1884 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1885 break; 1886 } 1887 // not enough 1888 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1889 break; 1890 #endif 1891 1892 // HCI_EVENT_DISCONNECTION_COMPLETE 1893 // has been split, to first notify stack before shutting connection down 1894 // see end of function, too. 1895 case HCI_EVENT_DISCONNECTION_COMPLETE: 1896 if (packet[2]) break; // status != 0 1897 handle = little_endian_read_16(packet, 3); 1898 // drop outgoing ACL fragments if it is for closed connection 1899 if (hci_stack->acl_fragmentation_total_size > 0) { 1900 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 1901 log_info("hci: drop fragmented ACL data for closed connection"); 1902 hci_stack->acl_fragmentation_total_size = 0; 1903 hci_stack->acl_fragmentation_pos = 0; 1904 } 1905 } 1906 1907 // re-enable advertisements for le connections if active 1908 conn = hci_connection_for_handle(handle); 1909 if (!conn) break; 1910 #ifdef ENABLE_BLE 1911 #ifdef ENABLE_LE_PERIPHERAL 1912 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1913 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1914 } 1915 #endif 1916 #endif 1917 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1918 break; 1919 1920 case HCI_EVENT_HARDWARE_ERROR: 1921 log_error("Hardware Error: 0x%02x", packet[2]); 1922 if (hci_stack->hardware_error_callback){ 1923 (*hci_stack->hardware_error_callback)(packet[2]); 1924 } else { 1925 // if no special requests, just reboot stack 1926 hci_power_control_off(); 1927 hci_power_control_on(); 1928 } 1929 break; 1930 1931 #ifdef ENABLE_CLASSIC 1932 case HCI_EVENT_ROLE_CHANGE: 1933 if (packet[2]) break; // status != 0 1934 handle = little_endian_read_16(packet, 3); 1935 conn = hci_connection_for_handle(handle); 1936 if (!conn) break; // no conn 1937 conn->role = packet[9]; 1938 break; 1939 #endif 1940 1941 case HCI_EVENT_TRANSPORT_PACKET_SENT: 1942 // release packet buffer only for asynchronous transport and if there are not further fragements 1943 if (hci_transport_synchronous()) { 1944 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 1945 return; // instead of break: to avoid re-entering hci_run() 1946 } 1947 if (hci_stack->acl_fragmentation_total_size) break; 1948 hci_release_packet_buffer(); 1949 1950 // L2CAP receives this event via the hci_emit_event below 1951 1952 #ifdef ENABLE_CLASSIC 1953 // For SCO, we do the can_send_now_check here 1954 hci_notify_if_sco_can_send_now(); 1955 #endif 1956 break; 1957 1958 #ifdef ENABLE_CLASSIC 1959 case HCI_EVENT_SCO_CAN_SEND_NOW: 1960 // For SCO, we do the can_send_now_check here 1961 hci_notify_if_sco_can_send_now(); 1962 return; 1963 #endif 1964 1965 #ifdef ENABLE_BLE 1966 case HCI_EVENT_LE_META: 1967 switch (packet[2]){ 1968 #ifdef ENABLE_LE_CENTRAL 1969 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1970 // log_info("advertising report received"); 1971 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1972 le_handle_advertisement_report(packet, size); 1973 break; 1974 #endif 1975 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1976 // Connection management 1977 reverse_bd_addr(&packet[8], addr); 1978 addr_type = (bd_addr_type_t)packet[7]; 1979 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1980 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1981 #ifdef ENABLE_LE_CENTRAL 1982 // if auto-connect, remove from whitelist in both roles 1983 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1984 hci_remove_from_whitelist(addr_type, addr); 1985 } 1986 // handle error: error is reported only to the initiator -> outgoing connection 1987 if (packet[3]){ 1988 // outgoing connection establishment is done 1989 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1990 // remove entry 1991 if (conn){ 1992 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1993 btstack_memory_hci_connection_free( conn ); 1994 } 1995 break; 1996 } 1997 #endif 1998 // on success, both hosts receive connection complete event 1999 if (packet[6] == HCI_ROLE_MASTER){ 2000 #ifdef ENABLE_LE_CENTRAL 2001 // if we're master, it was an outgoing connection and we're done with it 2002 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2003 #endif 2004 } else { 2005 #ifdef ENABLE_LE_PERIPHERAL 2006 // if we're slave, it was an incoming connection, advertisements have stopped 2007 hci_stack->le_advertisements_active = 0; 2008 // try to re-enable them 2009 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2010 #endif 2011 } 2012 // LE connections are auto-accepted, so just create a connection if there isn't one already 2013 if (!conn){ 2014 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2015 } 2016 // no memory, sorry. 2017 if (!conn){ 2018 break; 2019 } 2020 2021 conn->state = OPEN; 2022 conn->role = packet[6]; 2023 conn->con_handle = little_endian_read_16(packet, 4); 2024 2025 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2026 2027 // restart timer 2028 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2029 // btstack_run_loop_add_timer(&conn->timeout); 2030 2031 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2032 2033 hci_emit_nr_connections_changed(); 2034 break; 2035 2036 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2037 2038 default: 2039 break; 2040 } 2041 break; 2042 #endif 2043 default: 2044 break; 2045 } 2046 2047 // handle BT initialization 2048 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2049 hci_initializing_event_handler(packet, size); 2050 } 2051 2052 // help with BT sleep 2053 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2054 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2055 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2056 hci_initializing_next_state(); 2057 } 2058 2059 // notify upper stack 2060 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2061 2062 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2063 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2064 if (!packet[2]){ 2065 handle = little_endian_read_16(packet, 3); 2066 hci_connection_t * aConn = hci_connection_for_handle(handle); 2067 if (aConn) { 2068 uint8_t status = aConn->bonding_status; 2069 uint16_t flags = aConn->bonding_flags; 2070 bd_addr_t bd_address; 2071 memcpy(&bd_address, aConn->address, 6); 2072 hci_shutdown_connection(aConn); 2073 // connection struct is gone, don't access anymore 2074 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2075 hci_emit_dedicated_bonding_result(bd_address, status); 2076 } 2077 } 2078 } 2079 } 2080 2081 // execute main loop 2082 hci_run(); 2083 } 2084 2085 #ifdef ENABLE_CLASSIC 2086 static void sco_handler(uint8_t * packet, uint16_t size){ 2087 if (!hci_stack->sco_packet_handler) return; 2088 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2089 } 2090 #endif 2091 2092 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2093 hci_dump_packet(packet_type, 1, packet, size); 2094 switch (packet_type) { 2095 case HCI_EVENT_PACKET: 2096 event_handler(packet, size); 2097 break; 2098 case HCI_ACL_DATA_PACKET: 2099 acl_handler(packet, size); 2100 break; 2101 #ifdef ENABLE_CLASSIC 2102 case HCI_SCO_DATA_PACKET: 2103 sco_handler(packet, size); 2104 break; 2105 #endif 2106 default: 2107 break; 2108 } 2109 } 2110 2111 /** 2112 * @brief Add event packet handler. 2113 */ 2114 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2115 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2116 } 2117 2118 2119 /** Register HCI packet handlers */ 2120 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2121 hci_stack->acl_packet_handler = handler; 2122 } 2123 2124 #ifdef ENABLE_CLASSIC 2125 /** 2126 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2127 */ 2128 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2129 hci_stack->sco_packet_handler = handler; 2130 } 2131 #endif 2132 2133 static void hci_state_reset(void){ 2134 // no connections yet 2135 hci_stack->connections = NULL; 2136 2137 // keep discoverable/connectable as this has been requested by the client(s) 2138 // hci_stack->discoverable = 0; 2139 // hci_stack->connectable = 0; 2140 // hci_stack->bondable = 1; 2141 // hci_stack->own_addr_type = 0; 2142 2143 // buffer is free 2144 hci_stack->hci_packet_buffer_reserved = 0; 2145 2146 // no pending cmds 2147 hci_stack->decline_reason = 0; 2148 hci_stack->new_scan_enable_value = 0xff; 2149 2150 // LE 2151 #ifdef ENABLE_BLE 2152 memset(hci_stack->le_random_address, 0, 6); 2153 hci_stack->le_random_address_set = 0; 2154 #endif 2155 #ifdef ENABLE_LE_CENTRAL 2156 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2157 hci_stack->le_scan_type = 0xff; 2158 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2159 hci_stack->le_whitelist = 0; 2160 hci_stack->le_whitelist_capacity = 0; 2161 #endif 2162 2163 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2164 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2165 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2166 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2167 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2168 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2169 } 2170 2171 #ifdef ENABLE_CLASSIC 2172 /** 2173 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2174 */ 2175 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2176 // store and open remote device db 2177 hci_stack->link_key_db = link_key_db; 2178 if (hci_stack->link_key_db) { 2179 hci_stack->link_key_db->open(); 2180 } 2181 } 2182 #endif 2183 2184 void hci_init(const hci_transport_t *transport, const void *config){ 2185 2186 #ifdef HAVE_MALLOC 2187 if (!hci_stack) { 2188 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2189 } 2190 #else 2191 hci_stack = &hci_stack_static; 2192 #endif 2193 memset(hci_stack, 0, sizeof(hci_stack_t)); 2194 2195 // reference to use transport layer implementation 2196 hci_stack->hci_transport = transport; 2197 2198 // reference to used config 2199 hci_stack->config = config; 2200 2201 // setup pointer for outgoing packet buffer 2202 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2203 2204 // max acl payload size defined in config.h 2205 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2206 2207 // register packet handlers with transport 2208 transport->register_packet_handler(&packet_handler); 2209 2210 hci_stack->state = HCI_STATE_OFF; 2211 2212 // class of device 2213 hci_stack->class_of_device = 0x007a020c; // Smartphone 2214 2215 // bondable by default 2216 hci_stack->bondable = 1; 2217 2218 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2219 hci_stack->ssp_enable = 1; 2220 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2221 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2222 hci_stack->ssp_auto_accept = 1; 2223 2224 // voice setting - signed 16 bit pcm data with CVSD over the air 2225 hci_stack->sco_voice_setting = 0x60; 2226 2227 hci_state_reset(); 2228 } 2229 2230 /** 2231 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2232 */ 2233 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2234 hci_stack->chipset = chipset_driver; 2235 2236 // reset chipset driver - init is also called on power_up 2237 if (hci_stack->chipset && hci_stack->chipset->init){ 2238 hci_stack->chipset->init(hci_stack->config); 2239 } 2240 } 2241 2242 /** 2243 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2244 */ 2245 void hci_set_control(const btstack_control_t *hardware_control){ 2246 // references to used control implementation 2247 hci_stack->control = hardware_control; 2248 // init with transport config 2249 hardware_control->init(hci_stack->config); 2250 } 2251 2252 void hci_close(void){ 2253 // close remote device db 2254 if (hci_stack->link_key_db) { 2255 hci_stack->link_key_db->close(); 2256 } 2257 2258 btstack_linked_list_iterator_t lit; 2259 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2260 while (btstack_linked_list_iterator_has_next(&lit)){ 2261 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2262 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2263 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2264 hci_shutdown_connection(connection); 2265 } 2266 2267 hci_power_control(HCI_POWER_OFF); 2268 2269 #ifdef HAVE_MALLOC 2270 free(hci_stack); 2271 #endif 2272 hci_stack = NULL; 2273 } 2274 2275 #ifdef ENABLE_CLASSIC 2276 void gap_set_class_of_device(uint32_t class_of_device){ 2277 hci_stack->class_of_device = class_of_device; 2278 } 2279 2280 void hci_disable_l2cap_timeout_check(void){ 2281 disable_l2cap_timeouts = 1; 2282 } 2283 #endif 2284 2285 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2286 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2287 void hci_set_bd_addr(bd_addr_t addr){ 2288 memcpy(hci_stack->custom_bd_addr, addr, 6); 2289 hci_stack->custom_bd_addr_set = 1; 2290 } 2291 #endif 2292 2293 // State-Module-Driver overview 2294 // state module low-level 2295 // HCI_STATE_OFF off close 2296 // HCI_STATE_INITIALIZING, on open 2297 // HCI_STATE_WORKING, on open 2298 // HCI_STATE_HALTING, on open 2299 // HCI_STATE_SLEEPING, off/sleep close 2300 // HCI_STATE_FALLING_ASLEEP on open 2301 2302 static int hci_power_control_on(void){ 2303 2304 // power on 2305 int err = 0; 2306 if (hci_stack->control && hci_stack->control->on){ 2307 err = (*hci_stack->control->on)(); 2308 } 2309 if (err){ 2310 log_error( "POWER_ON failed"); 2311 hci_emit_hci_open_failed(); 2312 return err; 2313 } 2314 2315 // int chipset driver 2316 if (hci_stack->chipset && hci_stack->chipset->init){ 2317 hci_stack->chipset->init(hci_stack->config); 2318 } 2319 2320 // init transport 2321 if (hci_stack->hci_transport->init){ 2322 hci_stack->hci_transport->init(hci_stack->config); 2323 } 2324 2325 // open transport 2326 err = hci_stack->hci_transport->open(); 2327 if (err){ 2328 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2329 if (hci_stack->control && hci_stack->control->off){ 2330 (*hci_stack->control->off)(); 2331 } 2332 hci_emit_hci_open_failed(); 2333 return err; 2334 } 2335 return 0; 2336 } 2337 2338 static void hci_power_control_off(void){ 2339 2340 log_info("hci_power_control_off"); 2341 2342 // close low-level device 2343 hci_stack->hci_transport->close(); 2344 2345 log_info("hci_power_control_off - hci_transport closed"); 2346 2347 // power off 2348 if (hci_stack->control && hci_stack->control->off){ 2349 (*hci_stack->control->off)(); 2350 } 2351 2352 log_info("hci_power_control_off - control closed"); 2353 2354 hci_stack->state = HCI_STATE_OFF; 2355 } 2356 2357 static void hci_power_control_sleep(void){ 2358 2359 log_info("hci_power_control_sleep"); 2360 2361 #if 0 2362 // don't close serial port during sleep 2363 2364 // close low-level device 2365 hci_stack->hci_transport->close(hci_stack->config); 2366 #endif 2367 2368 // sleep mode 2369 if (hci_stack->control && hci_stack->control->sleep){ 2370 (*hci_stack->control->sleep)(); 2371 } 2372 2373 hci_stack->state = HCI_STATE_SLEEPING; 2374 } 2375 2376 static int hci_power_control_wake(void){ 2377 2378 log_info("hci_power_control_wake"); 2379 2380 // wake on 2381 if (hci_stack->control && hci_stack->control->wake){ 2382 (*hci_stack->control->wake)(); 2383 } 2384 2385 #if 0 2386 // open low-level device 2387 int err = hci_stack->hci_transport->open(hci_stack->config); 2388 if (err){ 2389 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2390 if (hci_stack->control && hci_stack->control->off){ 2391 (*hci_stack->control->off)(); 2392 } 2393 hci_emit_hci_open_failed(); 2394 return err; 2395 } 2396 #endif 2397 2398 return 0; 2399 } 2400 2401 static void hci_power_transition_to_initializing(void){ 2402 // set up state machine 2403 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2404 hci_stack->hci_packet_buffer_reserved = 0; 2405 hci_stack->state = HCI_STATE_INITIALIZING; 2406 hci_stack->substate = HCI_INIT_SEND_RESET; 2407 } 2408 2409 int hci_power_control(HCI_POWER_MODE power_mode){ 2410 2411 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2412 2413 int err = 0; 2414 switch (hci_stack->state){ 2415 2416 case HCI_STATE_OFF: 2417 switch (power_mode){ 2418 case HCI_POWER_ON: 2419 err = hci_power_control_on(); 2420 if (err) { 2421 log_error("hci_power_control_on() error %d", err); 2422 return err; 2423 } 2424 hci_power_transition_to_initializing(); 2425 break; 2426 case HCI_POWER_OFF: 2427 // do nothing 2428 break; 2429 case HCI_POWER_SLEEP: 2430 // do nothing (with SLEEP == OFF) 2431 break; 2432 } 2433 break; 2434 2435 case HCI_STATE_INITIALIZING: 2436 switch (power_mode){ 2437 case HCI_POWER_ON: 2438 // do nothing 2439 break; 2440 case HCI_POWER_OFF: 2441 // no connections yet, just turn it off 2442 hci_power_control_off(); 2443 break; 2444 case HCI_POWER_SLEEP: 2445 // no connections yet, just turn it off 2446 hci_power_control_sleep(); 2447 break; 2448 } 2449 break; 2450 2451 case HCI_STATE_WORKING: 2452 switch (power_mode){ 2453 case HCI_POWER_ON: 2454 // do nothing 2455 break; 2456 case HCI_POWER_OFF: 2457 // see hci_run 2458 hci_stack->state = HCI_STATE_HALTING; 2459 break; 2460 case HCI_POWER_SLEEP: 2461 // see hci_run 2462 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2463 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2464 break; 2465 } 2466 break; 2467 2468 case HCI_STATE_HALTING: 2469 switch (power_mode){ 2470 case HCI_POWER_ON: 2471 hci_power_transition_to_initializing(); 2472 break; 2473 case HCI_POWER_OFF: 2474 // do nothing 2475 break; 2476 case HCI_POWER_SLEEP: 2477 // see hci_run 2478 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2479 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2480 break; 2481 } 2482 break; 2483 2484 case HCI_STATE_FALLING_ASLEEP: 2485 switch (power_mode){ 2486 case HCI_POWER_ON: 2487 2488 #ifdef HAVE_PLATFORM_IPHONE_OS 2489 // nothing to do, if H4 supports power management 2490 if (btstack_control_iphone_power_management_enabled()){ 2491 hci_stack->state = HCI_STATE_INITIALIZING; 2492 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2493 break; 2494 } 2495 #endif 2496 hci_power_transition_to_initializing(); 2497 break; 2498 case HCI_POWER_OFF: 2499 // see hci_run 2500 hci_stack->state = HCI_STATE_HALTING; 2501 break; 2502 case HCI_POWER_SLEEP: 2503 // do nothing 2504 break; 2505 } 2506 break; 2507 2508 case HCI_STATE_SLEEPING: 2509 switch (power_mode){ 2510 case HCI_POWER_ON: 2511 2512 #ifdef HAVE_PLATFORM_IPHONE_OS 2513 // nothing to do, if H4 supports power management 2514 if (btstack_control_iphone_power_management_enabled()){ 2515 hci_stack->state = HCI_STATE_INITIALIZING; 2516 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2517 hci_update_scan_enable(); 2518 break; 2519 } 2520 #endif 2521 err = hci_power_control_wake(); 2522 if (err) return err; 2523 hci_power_transition_to_initializing(); 2524 break; 2525 case HCI_POWER_OFF: 2526 hci_stack->state = HCI_STATE_HALTING; 2527 break; 2528 case HCI_POWER_SLEEP: 2529 // do nothing 2530 break; 2531 } 2532 break; 2533 } 2534 2535 // create internal event 2536 hci_emit_state(); 2537 2538 // trigger next/first action 2539 hci_run(); 2540 2541 return 0; 2542 } 2543 2544 2545 #ifdef ENABLE_CLASSIC 2546 2547 static void hci_update_scan_enable(void){ 2548 // 2 = page scan, 1 = inq scan 2549 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2550 hci_run(); 2551 } 2552 2553 void gap_discoverable_control(uint8_t enable){ 2554 if (enable) enable = 1; // normalize argument 2555 2556 if (hci_stack->discoverable == enable){ 2557 hci_emit_discoverable_enabled(hci_stack->discoverable); 2558 return; 2559 } 2560 2561 hci_stack->discoverable = enable; 2562 hci_update_scan_enable(); 2563 } 2564 2565 void gap_connectable_control(uint8_t enable){ 2566 if (enable) enable = 1; // normalize argument 2567 2568 // don't emit event 2569 if (hci_stack->connectable == enable) return; 2570 2571 hci_stack->connectable = enable; 2572 hci_update_scan_enable(); 2573 } 2574 #endif 2575 2576 void gap_local_bd_addr(bd_addr_t address_buffer){ 2577 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2578 } 2579 2580 static void hci_run(void){ 2581 2582 // log_info("hci_run: entered"); 2583 btstack_linked_item_t * it; 2584 2585 // send continuation fragments first, as they block the prepared packet buffer 2586 if (hci_stack->acl_fragmentation_total_size > 0) { 2587 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2588 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2589 if (connection) { 2590 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2591 hci_send_acl_packet_fragments(connection); 2592 return; 2593 } 2594 } else { 2595 // connection gone -> discard further fragments 2596 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2597 hci_stack->acl_fragmentation_total_size = 0; 2598 hci_stack->acl_fragmentation_pos = 0; 2599 } 2600 } 2601 2602 if (!hci_can_send_command_packet_now()) return; 2603 2604 // global/non-connection oriented commands 2605 2606 #ifdef ENABLE_CLASSIC 2607 // decline incoming connections 2608 if (hci_stack->decline_reason){ 2609 uint8_t reason = hci_stack->decline_reason; 2610 hci_stack->decline_reason = 0; 2611 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2612 return; 2613 } 2614 2615 // send scan enable 2616 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2617 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2618 hci_stack->new_scan_enable_value = 0xff; 2619 return; 2620 } 2621 #endif 2622 2623 #ifdef ENABLE_BLE 2624 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 2625 if ((hci_stack->state == HCI_STATE_WORKING) 2626 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 2627 2628 #ifdef ENABLE_LE_CENTRAL 2629 // handle le scan 2630 switch(hci_stack->le_scanning_state){ 2631 case LE_START_SCAN: 2632 hci_stack->le_scanning_state = LE_SCANNING; 2633 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2634 return; 2635 2636 case LE_STOP_SCAN: 2637 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2638 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2639 return; 2640 default: 2641 break; 2642 } 2643 if (hci_stack->le_scan_type != 0xff){ 2644 // defaults: active scanning, accept all advertisement packets 2645 int scan_type = hci_stack->le_scan_type; 2646 hci_stack->le_scan_type = 0xff; 2647 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); 2648 return; 2649 } 2650 #endif 2651 #ifdef ENABLE_LE_PERIPHERAL 2652 // le advertisement control 2653 if (hci_stack->le_advertisements_todo){ 2654 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2655 } 2656 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2657 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2658 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2659 return; 2660 } 2661 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2662 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2663 hci_send_cmd(&hci_le_set_advertising_parameters, 2664 hci_stack->le_advertisements_interval_min, 2665 hci_stack->le_advertisements_interval_max, 2666 hci_stack->le_advertisements_type, 2667 hci_stack->le_own_addr_type, 2668 hci_stack->le_advertisements_direct_address_type, 2669 hci_stack->le_advertisements_direct_address, 2670 hci_stack->le_advertisements_channel_map, 2671 hci_stack->le_advertisements_filter_policy); 2672 return; 2673 } 2674 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2675 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2676 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, hci_stack->le_advertisements_data); 2677 return; 2678 } 2679 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2680 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2681 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2682 hci_stack->le_scan_response_data); 2683 return; 2684 } 2685 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2686 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2687 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2688 return; 2689 } 2690 #endif 2691 2692 #ifdef ENABLE_LE_CENTRAL 2693 // 2694 // LE Whitelist Management 2695 // 2696 2697 // check if whitelist needs modification 2698 btstack_linked_list_iterator_t lit; 2699 int modification_pending = 0; 2700 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2701 while (btstack_linked_list_iterator_has_next(&lit)){ 2702 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2703 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2704 modification_pending = 1; 2705 break; 2706 } 2707 } 2708 2709 if (modification_pending){ 2710 // stop connnecting if modification pending 2711 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2712 hci_send_cmd(&hci_le_create_connection_cancel); 2713 return; 2714 } 2715 2716 // add/remove entries 2717 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2718 while (btstack_linked_list_iterator_has_next(&lit)){ 2719 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2720 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2721 entry->state = LE_WHITELIST_ON_CONTROLLER; 2722 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2723 return; 2724 2725 } 2726 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2727 bd_addr_t address; 2728 bd_addr_type_t address_type = entry->address_type; 2729 memcpy(address, entry->address, 6); 2730 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2731 btstack_memory_whitelist_entry_free(entry); 2732 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2733 return; 2734 } 2735 } 2736 } 2737 2738 // start connecting 2739 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2740 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2741 bd_addr_t null_addr; 2742 memset(null_addr, 0, 6); 2743 hci_send_cmd(&hci_le_create_connection, 2744 0x0060, // scan interval: 60 ms 2745 0x0030, // scan interval: 30 ms 2746 1, // use whitelist 2747 0, // peer address type 2748 null_addr, // peer bd addr 2749 hci_stack->le_own_addr_type, // our addr type: 2750 0x0008, // conn interval min 2751 0x0018, // conn interval max 2752 0, // conn latency 2753 0x0048, // supervision timeout 2754 0x0001, // min ce length 2755 0x0001 // max ce length 2756 ); 2757 return; 2758 } 2759 #endif 2760 } 2761 #endif 2762 2763 // send pending HCI commands 2764 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2765 hci_connection_t * connection = (hci_connection_t *) it; 2766 2767 switch(connection->state){ 2768 case SEND_CREATE_CONNECTION: 2769 switch(connection->address_type){ 2770 #ifdef ENABLE_CLASSIC 2771 case BD_ADDR_TYPE_CLASSIC: 2772 log_info("sending hci_create_connection"); 2773 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2774 break; 2775 #endif 2776 default: 2777 #ifdef ENABLE_BLE 2778 #ifdef ENABLE_LE_CENTRAL 2779 log_info("sending hci_le_create_connection"); 2780 hci_send_cmd(&hci_le_create_connection, 2781 0x0060, // scan interval: 60 ms 2782 0x0030, // scan interval: 30 ms 2783 0, // don't use whitelist 2784 connection->address_type, // peer address type 2785 connection->address, // peer bd addr 2786 hci_stack->le_own_addr_type, // our addr type: 2787 0x0008, // conn interval min 2788 0x0018, // conn interval max 2789 0, // conn latency 2790 0x0048, // supervision timeout 2791 0x0001, // min ce length 2792 0x0001 // max ce length 2793 ); 2794 2795 connection->state = SENT_CREATE_CONNECTION; 2796 #endif 2797 #endif 2798 break; 2799 } 2800 return; 2801 2802 #ifdef ENABLE_CLASSIC 2803 case RECEIVED_CONNECTION_REQUEST: 2804 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2805 connection->state = ACCEPTED_CONNECTION_REQUEST; 2806 connection->role = HCI_ROLE_SLAVE; 2807 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2808 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2809 } 2810 return; 2811 #endif 2812 2813 #ifdef ENABLE_BLE 2814 #ifdef ENABLE_LE_CENTRAL 2815 case SEND_CANCEL_CONNECTION: 2816 connection->state = SENT_CANCEL_CONNECTION; 2817 hci_send_cmd(&hci_le_create_connection_cancel); 2818 return; 2819 #endif 2820 #endif 2821 case SEND_DISCONNECT: 2822 connection->state = SENT_DISCONNECT; 2823 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2824 return; 2825 2826 default: 2827 break; 2828 } 2829 2830 #ifdef ENABLE_CLASSIC 2831 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2832 log_info("responding to link key request"); 2833 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2834 link_key_t link_key; 2835 link_key_type_t link_key_type; 2836 if ( hci_stack->link_key_db 2837 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 2838 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2839 connection->link_key_type = link_key_type; 2840 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2841 } else { 2842 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2843 } 2844 return; 2845 } 2846 2847 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2848 log_info("denying to pin request"); 2849 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2850 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2851 return; 2852 } 2853 2854 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2855 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2856 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2857 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2858 // tweak authentication requirements 2859 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2860 if (connection->bonding_flags & BONDING_DEDICATED){ 2861 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2862 } 2863 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2864 authreq |= 1; 2865 } 2866 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2867 } else { 2868 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2869 } 2870 return; 2871 } 2872 2873 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2874 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2875 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2876 return; 2877 } 2878 2879 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2880 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2881 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2882 return; 2883 } 2884 2885 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2886 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2887 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2888 return; 2889 } 2890 2891 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2892 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2893 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2894 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2895 return; 2896 } 2897 2898 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2899 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2900 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2901 return; 2902 } 2903 2904 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2905 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2906 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2907 return; 2908 } 2909 #endif 2910 2911 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2912 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2913 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2914 return; 2915 } 2916 2917 #ifdef ENABLE_BLE 2918 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2919 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2920 2921 uint16_t connection_interval_min = connection->le_conn_interval_min; 2922 connection->le_conn_interval_min = 0; 2923 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2924 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2925 0x0000, 0xffff); 2926 } 2927 #endif 2928 } 2929 2930 hci_connection_t * connection; 2931 switch (hci_stack->state){ 2932 case HCI_STATE_INITIALIZING: 2933 hci_initializing_run(); 2934 break; 2935 2936 case HCI_STATE_HALTING: 2937 2938 log_info("HCI_STATE_HALTING"); 2939 2940 // free whitelist entries 2941 #ifdef ENABLE_BLE 2942 #ifdef ENABLE_LE_CENTRAL 2943 { 2944 btstack_linked_list_iterator_t lit; 2945 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2946 while (btstack_linked_list_iterator_has_next(&lit)){ 2947 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2948 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2949 btstack_memory_whitelist_entry_free(entry); 2950 } 2951 } 2952 #endif 2953 #endif 2954 // close all open connections 2955 connection = (hci_connection_t *) hci_stack->connections; 2956 if (connection){ 2957 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 2958 if (!hci_can_send_command_packet_now()) return; 2959 2960 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2961 2962 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2963 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2964 2965 // ... which would be ignored anyway as we shutdown (free) the connection now 2966 hci_shutdown_connection(connection); 2967 2968 // finally, send the disconnect command 2969 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2970 return; 2971 } 2972 log_info("HCI_STATE_HALTING, calling off"); 2973 2974 // switch mode 2975 hci_power_control_off(); 2976 2977 log_info("HCI_STATE_HALTING, emitting state"); 2978 hci_emit_state(); 2979 log_info("HCI_STATE_HALTING, done"); 2980 break; 2981 2982 case HCI_STATE_FALLING_ASLEEP: 2983 switch(hci_stack->substate) { 2984 case HCI_FALLING_ASLEEP_DISCONNECT: 2985 log_info("HCI_STATE_FALLING_ASLEEP"); 2986 // close all open connections 2987 connection = (hci_connection_t *) hci_stack->connections; 2988 2989 #ifdef HAVE_PLATFORM_IPHONE_OS 2990 // don't close connections, if H4 supports power management 2991 if (btstack_control_iphone_power_management_enabled()){ 2992 connection = NULL; 2993 } 2994 #endif 2995 if (connection){ 2996 2997 // send disconnect 2998 if (!hci_can_send_command_packet_now()) return; 2999 3000 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3001 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3002 3003 // send disconnected event right away - causes higher layer connections to get closed, too. 3004 hci_shutdown_connection(connection); 3005 return; 3006 } 3007 3008 if (hci_classic_supported()){ 3009 // disable page and inquiry scan 3010 if (!hci_can_send_command_packet_now()) return; 3011 3012 log_info("HCI_STATE_HALTING, disabling inq scans"); 3013 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3014 3015 // continue in next sub state 3016 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3017 break; 3018 } 3019 // no break - fall through for ble-only chips 3020 3021 case HCI_FALLING_ASLEEP_COMPLETE: 3022 log_info("HCI_STATE_HALTING, calling sleep"); 3023 #ifdef HAVE_PLATFORM_IPHONE_OS 3024 // don't actually go to sleep, if H4 supports power management 3025 if (btstack_control_iphone_power_management_enabled()){ 3026 // SLEEP MODE reached 3027 hci_stack->state = HCI_STATE_SLEEPING; 3028 hci_emit_state(); 3029 break; 3030 } 3031 #endif 3032 // switch mode 3033 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3034 hci_emit_state(); 3035 break; 3036 3037 default: 3038 break; 3039 } 3040 break; 3041 3042 default: 3043 break; 3044 } 3045 } 3046 3047 int hci_send_cmd_packet(uint8_t *packet, int size){ 3048 // house-keeping 3049 3050 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3051 hci_stack->loopback_mode = packet[3]; 3052 } 3053 3054 #ifdef ENABLE_CLASSIC 3055 bd_addr_t addr; 3056 hci_connection_t * conn; 3057 3058 // create_connection? 3059 if (IS_COMMAND(packet, hci_create_connection)){ 3060 reverse_bd_addr(&packet[3], addr); 3061 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3062 3063 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3064 if (!conn){ 3065 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3066 if (!conn){ 3067 // notify client that alloc failed 3068 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3069 return 0; // don't sent packet to controller 3070 } 3071 conn->state = SEND_CREATE_CONNECTION; 3072 } 3073 log_info("conn state %u", conn->state); 3074 switch (conn->state){ 3075 // if connection active exists 3076 case OPEN: 3077 // and OPEN, emit connection complete command, don't send to controller 3078 hci_emit_connection_complete(addr, conn->con_handle, 0); 3079 return 0; 3080 case SEND_CREATE_CONNECTION: 3081 // connection created by hci, e.g. dedicated bonding 3082 break; 3083 default: 3084 // otherwise, just ignore as it is already in the open process 3085 return 0; 3086 } 3087 conn->state = SENT_CREATE_CONNECTION; 3088 } 3089 3090 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3091 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3092 } 3093 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3094 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3095 } 3096 3097 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3098 if (hci_stack->link_key_db){ 3099 reverse_bd_addr(&packet[3], addr); 3100 hci_stack->link_key_db->delete_link_key(addr); 3101 } 3102 } 3103 3104 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3105 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3106 reverse_bd_addr(&packet[3], addr); 3107 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3108 if (conn){ 3109 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3110 } 3111 } 3112 3113 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3114 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3115 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3116 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3117 reverse_bd_addr(&packet[3], addr); 3118 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3119 if (conn){ 3120 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3121 } 3122 } 3123 3124 #ifdef ENABLE_SCO_OVER_HCI 3125 // setup_synchronous_connection? Voice setting at offset 22 3126 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3127 // TODO: compare to current setting if sco connection already active 3128 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3129 } 3130 // accept_synchronus_connection? Voice setting at offset 18 3131 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3132 // TODO: compare to current setting if sco connection already active 3133 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3134 } 3135 #endif 3136 #endif 3137 3138 #ifdef ENABLE_BLE 3139 #ifdef ENABLE_LE_PERIPHERAL 3140 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3141 hci_stack->le_random_address_set = 1; 3142 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3143 } 3144 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3145 hci_stack->le_advertisements_active = packet[3]; 3146 } 3147 #endif 3148 #ifdef ENABLE_LE_CENTRAL 3149 if (IS_COMMAND(packet, hci_le_create_connection)){ 3150 // white list used? 3151 uint8_t initiator_filter_policy = packet[7]; 3152 switch (initiator_filter_policy){ 3153 case 0: 3154 // whitelist not used 3155 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3156 break; 3157 case 1: 3158 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3159 break; 3160 default: 3161 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3162 break; 3163 } 3164 } 3165 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3166 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3167 } 3168 #endif 3169 #endif 3170 3171 hci_stack->num_cmd_packets--; 3172 3173 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3174 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3175 3176 // release packet buffer for synchronous transport implementations 3177 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3178 hci_stack->hci_packet_buffer_reserved = 0; 3179 } 3180 3181 return err; 3182 } 3183 3184 // disconnect because of security block 3185 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3186 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3187 if (!connection) return; 3188 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3189 } 3190 3191 3192 // Configure Secure Simple Pairing 3193 3194 #ifdef ENABLE_CLASSIC 3195 3196 // enable will enable SSP during init 3197 void gap_ssp_set_enable(int enable){ 3198 hci_stack->ssp_enable = enable; 3199 } 3200 3201 static int hci_local_ssp_activated(void){ 3202 return gap_ssp_supported() && hci_stack->ssp_enable; 3203 } 3204 3205 // if set, BTstack will respond to io capability request using authentication requirement 3206 void gap_ssp_set_io_capability(int io_capability){ 3207 hci_stack->ssp_io_capability = io_capability; 3208 } 3209 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3210 hci_stack->ssp_authentication_requirement = authentication_requirement; 3211 } 3212 3213 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3214 void gap_ssp_set_auto_accept(int auto_accept){ 3215 hci_stack->ssp_auto_accept = auto_accept; 3216 } 3217 #endif 3218 3219 // va_list part of hci_send_cmd 3220 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3221 if (!hci_can_send_command_packet_now()){ 3222 log_error("hci_send_cmd called but cannot send packet now"); 3223 return 0; 3224 } 3225 3226 // for HCI INITIALIZATION 3227 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3228 hci_stack->last_cmd_opcode = cmd->opcode; 3229 3230 hci_reserve_packet_buffer(); 3231 uint8_t * packet = hci_stack->hci_packet_buffer; 3232 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3233 return hci_send_cmd_packet(packet, size); 3234 } 3235 3236 /** 3237 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3238 */ 3239 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3240 va_list argptr; 3241 va_start(argptr, cmd); 3242 int res = hci_send_cmd_va_arg(cmd, argptr); 3243 va_end(argptr); 3244 return res; 3245 } 3246 3247 // Create various non-HCI events. 3248 // TODO: generalize, use table similar to hci_create_command 3249 3250 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3251 // dump packet 3252 if (dump) { 3253 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3254 } 3255 3256 // dispatch to all event handlers 3257 btstack_linked_list_iterator_t it; 3258 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3259 while (btstack_linked_list_iterator_has_next(&it)){ 3260 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3261 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3262 } 3263 } 3264 3265 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3266 if (!hci_stack->acl_packet_handler) return; 3267 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3268 } 3269 3270 #ifdef ENABLE_CLASSIC 3271 static void hci_notify_if_sco_can_send_now(void){ 3272 // notify SCO sender if waiting 3273 if (!hci_stack->sco_waiting_for_can_send_now) return; 3274 if (hci_can_send_sco_packet_now()){ 3275 hci_stack->sco_waiting_for_can_send_now = 0; 3276 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3277 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3278 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3279 } 3280 } 3281 #endif 3282 3283 void hci_emit_state(void){ 3284 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3285 uint8_t event[3]; 3286 event[0] = BTSTACK_EVENT_STATE; 3287 event[1] = sizeof(event) - 2; 3288 event[2] = hci_stack->state; 3289 hci_emit_event(event, sizeof(event), 1); 3290 } 3291 3292 #ifdef ENABLE_CLASSIC 3293 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3294 uint8_t event[13]; 3295 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3296 event[1] = sizeof(event) - 2; 3297 event[2] = status; 3298 little_endian_store_16(event, 3, con_handle); 3299 reverse_bd_addr(address, &event[5]); 3300 event[11] = 1; // ACL connection 3301 event[12] = 0; // encryption disabled 3302 hci_emit_event(event, sizeof(event), 1); 3303 } 3304 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3305 if (disable_l2cap_timeouts) return; 3306 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3307 uint8_t event[4]; 3308 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3309 event[1] = sizeof(event) - 2; 3310 little_endian_store_16(event, 2, conn->con_handle); 3311 hci_emit_event(event, sizeof(event), 1); 3312 } 3313 #endif 3314 3315 #ifdef ENABLE_BLE 3316 #ifdef ENABLE_LE_CENTRAL 3317 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3318 uint8_t event[21]; 3319 event[0] = HCI_EVENT_LE_META; 3320 event[1] = sizeof(event) - 2; 3321 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3322 event[3] = status; 3323 little_endian_store_16(event, 4, con_handle); 3324 event[6] = 0; // TODO: role 3325 event[7] = address_type; 3326 reverse_bd_addr(address, &event[8]); 3327 little_endian_store_16(event, 14, 0); // interval 3328 little_endian_store_16(event, 16, 0); // latency 3329 little_endian_store_16(event, 18, 0); // supervision timeout 3330 event[20] = 0; // master clock accuracy 3331 hci_emit_event(event, sizeof(event), 1); 3332 } 3333 #endif 3334 #endif 3335 3336 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3337 uint8_t event[6]; 3338 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3339 event[1] = sizeof(event) - 2; 3340 event[2] = 0; // status = OK 3341 little_endian_store_16(event, 3, con_handle); 3342 event[5] = reason; 3343 hci_emit_event(event, sizeof(event), 1); 3344 } 3345 3346 static void hci_emit_nr_connections_changed(void){ 3347 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3348 uint8_t event[3]; 3349 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3350 event[1] = sizeof(event) - 2; 3351 event[2] = nr_hci_connections(); 3352 hci_emit_event(event, sizeof(event), 1); 3353 } 3354 3355 static void hci_emit_hci_open_failed(void){ 3356 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3357 uint8_t event[2]; 3358 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3359 event[1] = sizeof(event) - 2; 3360 hci_emit_event(event, sizeof(event), 1); 3361 } 3362 3363 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3364 log_info("hci_emit_dedicated_bonding_result %u ", status); 3365 uint8_t event[9]; 3366 int pos = 0; 3367 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3368 event[pos++] = sizeof(event) - 2; 3369 event[pos++] = status; 3370 reverse_bd_addr(address, &event[pos]); 3371 hci_emit_event(event, sizeof(event), 1); 3372 } 3373 3374 3375 #ifdef ENABLE_CLASSIC 3376 3377 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3378 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3379 uint8_t event[5]; 3380 int pos = 0; 3381 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3382 event[pos++] = sizeof(event) - 2; 3383 little_endian_store_16(event, 2, con_handle); 3384 pos += 2; 3385 event[pos++] = level; 3386 hci_emit_event(event, sizeof(event), 1); 3387 } 3388 3389 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3390 if (!connection) return LEVEL_0; 3391 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3392 return gap_security_level_for_link_key_type(connection->link_key_type); 3393 } 3394 3395 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3396 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3397 uint8_t event[3]; 3398 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3399 event[1] = sizeof(event) - 2; 3400 event[2] = enabled; 3401 hci_emit_event(event, sizeof(event), 1); 3402 } 3403 3404 #ifdef ENABLE_CLASSIC 3405 // query if remote side supports eSCO 3406 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3407 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3408 if (!connection) return 0; 3409 return connection->remote_supported_feature_eSCO; 3410 } 3411 3412 // query if remote side supports SSP 3413 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3414 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3415 if (!connection) return 0; 3416 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3417 } 3418 3419 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3420 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3421 } 3422 #endif 3423 3424 // GAP API 3425 /** 3426 * @bbrief enable/disable bonding. default is enabled 3427 * @praram enabled 3428 */ 3429 void gap_set_bondable_mode(int enable){ 3430 hci_stack->bondable = enable ? 1 : 0; 3431 } 3432 /** 3433 * @brief Get bondable mode. 3434 * @return 1 if bondable 3435 */ 3436 int gap_get_bondable_mode(void){ 3437 return hci_stack->bondable; 3438 } 3439 3440 /** 3441 * @brief map link keys to security levels 3442 */ 3443 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3444 switch (link_key_type){ 3445 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3446 return LEVEL_4; 3447 case COMBINATION_KEY: 3448 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3449 return LEVEL_3; 3450 default: 3451 return LEVEL_2; 3452 } 3453 } 3454 3455 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3456 log_info("gap_mitm_protection_required_for_security_level %u", level); 3457 return level > LEVEL_2; 3458 } 3459 3460 /** 3461 * @brief get current security level 3462 */ 3463 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3464 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3465 if (!connection) return LEVEL_0; 3466 return gap_security_level_for_connection(connection); 3467 } 3468 3469 /** 3470 * @brief request connection to device to 3471 * @result GAP_AUTHENTICATION_RESULT 3472 */ 3473 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3474 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3475 if (!connection){ 3476 hci_emit_security_level(con_handle, LEVEL_0); 3477 return; 3478 } 3479 gap_security_level_t current_level = gap_security_level(con_handle); 3480 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3481 if (current_level >= requested_level){ 3482 hci_emit_security_level(con_handle, current_level); 3483 return; 3484 } 3485 3486 connection->requested_security_level = requested_level; 3487 3488 #if 0 3489 // sending encryption request without a link key results in an error. 3490 // TODO: figure out how to use it properly 3491 3492 // would enabling ecnryption suffice (>= LEVEL_2)? 3493 if (hci_stack->link_key_db){ 3494 link_key_type_t link_key_type; 3495 link_key_t link_key; 3496 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3497 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3498 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3499 return; 3500 } 3501 } 3502 } 3503 #endif 3504 3505 // try to authenticate connection 3506 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3507 hci_run(); 3508 } 3509 3510 /** 3511 * @brief start dedicated bonding with device. disconnect after bonding 3512 * @param device 3513 * @param request MITM protection 3514 * @result GAP_DEDICATED_BONDING_COMPLETE 3515 */ 3516 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3517 3518 // create connection state machine 3519 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3520 3521 if (!connection){ 3522 return BTSTACK_MEMORY_ALLOC_FAILED; 3523 } 3524 3525 // delete linkn key 3526 gap_drop_link_key_for_bd_addr(device); 3527 3528 // configure LEVEL_2/3, dedicated bonding 3529 connection->state = SEND_CREATE_CONNECTION; 3530 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3531 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3532 connection->bonding_flags = BONDING_DEDICATED; 3533 3534 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3535 3536 // handle: connnection failure (connection complete != ok) 3537 // handle: authentication failure 3538 // handle: disconnect on done 3539 3540 hci_run(); 3541 3542 return 0; 3543 } 3544 #endif 3545 3546 void gap_set_local_name(const char * local_name){ 3547 hci_stack->local_name = local_name; 3548 } 3549 3550 3551 #ifdef ENABLE_BLE 3552 3553 #ifdef ENABLE_LE_CENTRAL 3554 void gap_start_scan(void){ 3555 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3556 hci_stack->le_scanning_state = LE_START_SCAN; 3557 hci_run(); 3558 } 3559 3560 void gap_stop_scan(void){ 3561 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3562 hci_stack->le_scanning_state = LE_STOP_SCAN; 3563 hci_run(); 3564 } 3565 3566 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3567 hci_stack->le_scan_type = scan_type; 3568 hci_stack->le_scan_interval = scan_interval; 3569 hci_stack->le_scan_window = scan_window; 3570 hci_run(); 3571 } 3572 3573 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3574 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3575 if (!conn){ 3576 log_info("gap_connect: no connection exists yet, creating context"); 3577 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3578 if (!conn){ 3579 // notify client that alloc failed 3580 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3581 log_info("gap_connect: failed to alloc hci_connection_t"); 3582 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3583 } 3584 conn->state = SEND_CREATE_CONNECTION; 3585 log_info("gap_connect: send create connection next"); 3586 hci_run(); 3587 return 0; 3588 } 3589 3590 if (!hci_is_le_connection(conn) || 3591 conn->state == SEND_CREATE_CONNECTION || 3592 conn->state == SENT_CREATE_CONNECTION) { 3593 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3594 log_error("gap_connect: classic connection or connect is already being created"); 3595 return GATT_CLIENT_IN_WRONG_STATE; 3596 } 3597 3598 log_info("gap_connect: context exists with state %u", conn->state); 3599 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3600 hci_run(); 3601 return 0; 3602 } 3603 3604 // @assumption: only a single outgoing LE Connection exists 3605 static hci_connection_t * gap_get_outgoing_connection(void){ 3606 btstack_linked_item_t *it; 3607 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3608 hci_connection_t * conn = (hci_connection_t *) it; 3609 if (!hci_is_le_connection(conn)) continue; 3610 switch (conn->state){ 3611 case SEND_CREATE_CONNECTION: 3612 case SENT_CREATE_CONNECTION: 3613 return conn; 3614 default: 3615 break; 3616 }; 3617 } 3618 return NULL; 3619 } 3620 3621 uint8_t gap_connect_cancel(void){ 3622 hci_connection_t * conn = gap_get_outgoing_connection(); 3623 if (!conn) return 0; 3624 switch (conn->state){ 3625 case SEND_CREATE_CONNECTION: 3626 // skip sending create connection and emit event instead 3627 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3628 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3629 btstack_memory_hci_connection_free( conn ); 3630 break; 3631 case SENT_CREATE_CONNECTION: 3632 // request to send cancel connection 3633 conn->state = SEND_CANCEL_CONNECTION; 3634 hci_run(); 3635 break; 3636 default: 3637 break; 3638 } 3639 return 0; 3640 } 3641 #endif 3642 3643 /** 3644 * @brief Updates the connection parameters for a given LE connection 3645 * @param handle 3646 * @param conn_interval_min (unit: 1.25ms) 3647 * @param conn_interval_max (unit: 1.25ms) 3648 * @param conn_latency 3649 * @param supervision_timeout (unit: 10ms) 3650 * @returns 0 if ok 3651 */ 3652 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3653 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3654 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3655 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3656 connection->le_conn_interval_min = conn_interval_min; 3657 connection->le_conn_interval_max = conn_interval_max; 3658 connection->le_conn_latency = conn_latency; 3659 connection->le_supervision_timeout = supervision_timeout; 3660 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3661 hci_run(); 3662 return 0; 3663 } 3664 3665 /** 3666 * @brief Request an update of the connection parameter for a given LE connection 3667 * @param handle 3668 * @param conn_interval_min (unit: 1.25ms) 3669 * @param conn_interval_max (unit: 1.25ms) 3670 * @param conn_latency 3671 * @param supervision_timeout (unit: 10ms) 3672 * @returns 0 if ok 3673 */ 3674 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3675 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3676 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3677 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3678 connection->le_conn_interval_min = conn_interval_min; 3679 connection->le_conn_interval_max = conn_interval_max; 3680 connection->le_conn_latency = conn_latency; 3681 connection->le_supervision_timeout = supervision_timeout; 3682 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3683 hci_run(); 3684 return 0; 3685 } 3686 3687 #ifdef ENABLE_LE_PERIPHERAL 3688 3689 static void gap_advertisments_changed(void){ 3690 // disable advertisements before updating adv, scan data, or adv params 3691 if (hci_stack->le_advertisements_active){ 3692 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3693 } 3694 hci_run(); 3695 } 3696 3697 /** 3698 * @brief Set Advertisement Data 3699 * @param advertising_data_length 3700 * @param advertising_data (max 31 octets) 3701 * @note data is not copied, pointer has to stay valid 3702 */ 3703 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3704 hci_stack->le_advertisements_data_len = advertising_data_length; 3705 hci_stack->le_advertisements_data = advertising_data; 3706 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3707 gap_advertisments_changed(); 3708 } 3709 3710 /** 3711 * @brief Set Scan Response Data 3712 * @param advertising_data_length 3713 * @param advertising_data (max 31 octets) 3714 * @note data is not copied, pointer has to stay valid 3715 */ 3716 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3717 hci_stack->le_scan_response_data_len = scan_response_data_length; 3718 hci_stack->le_scan_response_data = scan_response_data; 3719 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3720 gap_advertisments_changed(); 3721 } 3722 3723 /** 3724 * @brief Set Advertisement Parameters 3725 * @param adv_int_min 3726 * @param adv_int_max 3727 * @param adv_type 3728 * @param direct_address_type 3729 * @param direct_address 3730 * @param channel_map 3731 * @param filter_policy 3732 * 3733 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3734 */ 3735 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3736 uint8_t direct_address_typ, bd_addr_t direct_address, 3737 uint8_t channel_map, uint8_t filter_policy) { 3738 3739 hci_stack->le_advertisements_interval_min = adv_int_min; 3740 hci_stack->le_advertisements_interval_max = adv_int_max; 3741 hci_stack->le_advertisements_type = adv_type; 3742 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3743 hci_stack->le_advertisements_channel_map = channel_map; 3744 hci_stack->le_advertisements_filter_policy = filter_policy; 3745 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3746 3747 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3748 gap_advertisments_changed(); 3749 } 3750 3751 /** 3752 * @brief Enable/Disable Advertisements 3753 * @param enabled 3754 */ 3755 void gap_advertisements_enable(int enabled){ 3756 hci_stack->le_advertisements_enabled = enabled; 3757 if (enabled && !hci_stack->le_advertisements_active){ 3758 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3759 } 3760 if (!enabled && hci_stack->le_advertisements_active){ 3761 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3762 } 3763 hci_run(); 3764 } 3765 3766 #endif 3767 3768 void hci_le_set_own_address_type(uint8_t own_address_type){ 3769 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 3770 if (own_address_type == hci_stack->le_own_addr_type) return; 3771 hci_stack->le_own_addr_type = own_address_type; 3772 3773 #ifdef ENABLE_LE_PERIPHERAL 3774 // update advertisement parameters, too 3775 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3776 gap_advertisments_changed(); 3777 #endif 3778 #ifdef ENABLE_LE_CENTRAL 3779 // note: we don't update scan parameters or modify ongoing connection attempts 3780 #endif 3781 } 3782 3783 #endif 3784 3785 uint8_t gap_disconnect(hci_con_handle_t handle){ 3786 hci_connection_t * conn = hci_connection_for_handle(handle); 3787 if (!conn){ 3788 hci_emit_disconnection_complete(handle, 0); 3789 return 0; 3790 } 3791 conn->state = SEND_DISCONNECT; 3792 hci_run(); 3793 return 0; 3794 } 3795 3796 /** 3797 * @brief Get connection type 3798 * @param con_handle 3799 * @result connection_type 3800 */ 3801 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3802 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3803 if (!conn) return GAP_CONNECTION_INVALID; 3804 switch (conn->address_type){ 3805 case BD_ADDR_TYPE_LE_PUBLIC: 3806 case BD_ADDR_TYPE_LE_RANDOM: 3807 return GAP_CONNECTION_LE; 3808 case BD_ADDR_TYPE_SCO: 3809 return GAP_CONNECTION_SCO; 3810 case BD_ADDR_TYPE_CLASSIC: 3811 return GAP_CONNECTION_ACL; 3812 default: 3813 return GAP_CONNECTION_INVALID; 3814 } 3815 } 3816 3817 #ifdef ENABLE_BLE 3818 3819 #ifdef ENABLE_LE_CENTRAL 3820 /** 3821 * @brief Auto Connection Establishment - Start Connecting to device 3822 * @param address_typ 3823 * @param address 3824 * @returns 0 if ok 3825 */ 3826 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3827 // check capacity 3828 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 3829 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3830 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3831 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3832 entry->address_type = address_type; 3833 memcpy(entry->address, address, 6); 3834 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3835 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 3836 hci_run(); 3837 return 0; 3838 } 3839 3840 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3841 btstack_linked_list_iterator_t it; 3842 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3843 while (btstack_linked_list_iterator_has_next(&it)){ 3844 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3845 if (entry->address_type != address_type) continue; 3846 if (memcmp(entry->address, address, 6) != 0) continue; 3847 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3848 // remove from controller if already present 3849 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3850 continue; 3851 } 3852 // direclty remove entry from whitelist 3853 btstack_linked_list_iterator_remove(&it); 3854 btstack_memory_whitelist_entry_free(entry); 3855 } 3856 } 3857 3858 /** 3859 * @brief Auto Connection Establishment - Stop Connecting to device 3860 * @param address_typ 3861 * @param address 3862 * @returns 0 if ok 3863 */ 3864 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3865 hci_remove_from_whitelist(address_type, address); 3866 hci_run(); 3867 return 0; 3868 } 3869 3870 /** 3871 * @brief Auto Connection Establishment - Stop everything 3872 * @note Convenience function to stop all active auto connection attempts 3873 */ 3874 void gap_auto_connection_stop_all(void){ 3875 btstack_linked_list_iterator_t it; 3876 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3877 while (btstack_linked_list_iterator_has_next(&it)){ 3878 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3879 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3880 // remove from controller if already present 3881 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3882 continue; 3883 } 3884 // directly remove entry from whitelist 3885 btstack_linked_list_iterator_remove(&it); 3886 btstack_memory_whitelist_entry_free(entry); 3887 } 3888 hci_run(); 3889 } 3890 #endif 3891 #endif 3892 3893 #ifdef ENABLE_CLASSIC 3894 /** 3895 * @brief Set Extended Inquiry Response data 3896 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 3897 * @note has to be done before stack starts up 3898 */ 3899 void gap_set_extended_inquiry_response(const uint8_t * data){ 3900 hci_stack->eir_data = data; 3901 } 3902 3903 /** 3904 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 3905 * @param inquriy_mode see bluetooth_defines.h 3906 */ 3907 void hci_set_inquiry_mode(inquiry_mode_t mode){ 3908 hci_stack->inquiry_mode = mode; 3909 } 3910 3911 /** 3912 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3913 */ 3914 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3915 hci_stack->sco_voice_setting = voice_setting; 3916 } 3917 3918 /** 3919 * @brief Get SCO Voice Setting 3920 * @return current voice setting 3921 */ 3922 uint16_t hci_get_sco_voice_setting(void){ 3923 return hci_stack->sco_voice_setting; 3924 } 3925 3926 /** @brief Get SCO packet length for current SCO Voice setting 3927 * @note Using SCO packets of the exact length is required for USB transfer 3928 * @return Length of SCO packets in bytes (not audio frames) 3929 */ 3930 int hci_get_sco_packet_length(void){ 3931 // see Core Spec for H2 USB Transfer. 3932 if (hci_stack->sco_voice_setting & 0x0020) return 51; 3933 return 27; 3934 } 3935 #endif 3936 3937 /** 3938 * @brief Set callback for Bluetooth Hardware Error 3939 */ 3940 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 3941 hci_stack->hardware_error_callback = fn; 3942 } 3943 3944 void hci_disconnect_all(void){ 3945 btstack_linked_list_iterator_t it; 3946 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 3947 while (btstack_linked_list_iterator_has_next(&it)){ 3948 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 3949 if (con->state == SENT_DISCONNECT) continue; 3950 con->state = SEND_DISCONNECT; 3951 } 3952 hci_run(); 3953 } 3954 3955 uint16_t hci_get_manufacturer(void){ 3956 return hci_stack->manufacturer; 3957 } 3958