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 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 976 // otherwise continue 977 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 978 hci_send_cmd(&hci_read_local_supported_commands); 979 break; 980 default: 981 break; 982 } 983 } 984 #endif 985 986 static void hci_initializing_next_state(void){ 987 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 988 } 989 990 // assumption: hci_can_send_command_packet_now() == true 991 static void hci_initializing_run(void){ 992 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 993 switch (hci_stack->substate){ 994 case HCI_INIT_SEND_RESET: 995 hci_state_reset(); 996 997 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 998 // prepare reset if command complete not received in 100ms 999 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1000 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1001 btstack_run_loop_add_timer(&hci_stack->timeout); 1002 #endif 1003 // send command 1004 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1005 hci_send_cmd(&hci_reset); 1006 break; 1007 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1008 hci_send_cmd(&hci_read_local_version_information); 1009 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1010 break; 1011 case HCI_INIT_SEND_READ_LOCAL_NAME: 1012 hci_send_cmd(&hci_read_local_name); 1013 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1014 break; 1015 1016 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1017 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1018 hci_state_reset(); 1019 // prepare reset if command complete not received in 100ms 1020 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1021 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1022 btstack_run_loop_add_timer(&hci_stack->timeout); 1023 // send command 1024 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1025 hci_send_cmd(&hci_reset); 1026 break; 1027 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1028 hci_state_reset(); 1029 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1030 hci_send_cmd(&hci_reset); 1031 break; 1032 case HCI_INIT_SEND_BAUD_CHANGE: { 1033 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1034 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1035 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1036 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1037 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1038 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1039 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1040 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1041 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1042 btstack_run_loop_add_timer(&hci_stack->timeout); 1043 } 1044 break; 1045 } 1046 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1047 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1048 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1049 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1050 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1051 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1052 break; 1053 } 1054 case HCI_INIT_CUSTOM_INIT: 1055 // Custom initialization 1056 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1057 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1058 if (valid_cmd){ 1059 int size = 3 + hci_stack->hci_packet_buffer[2]; 1060 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1061 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1062 switch (valid_cmd) { 1063 case 1: 1064 default: 1065 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1066 break; 1067 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1068 log_info("CSR Warm Boot"); 1069 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1070 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1071 btstack_run_loop_add_timer(&hci_stack->timeout); 1072 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1073 && hci_stack->config 1074 && hci_stack->chipset 1075 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1076 && hci_stack->hci_transport->set_baudrate 1077 && hci_transport_uart_get_main_baud_rate()){ 1078 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1079 } else { 1080 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1081 } 1082 break; 1083 } 1084 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1085 break; 1086 } 1087 log_info("Init script done"); 1088 1089 // Init script download on Broadcom chipsets causes: 1090 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1091 // - baud rate to reset, restore UART baud rate if needed 1092 int need_baud_change = hci_stack->config 1093 && hci_stack->chipset 1094 && hci_stack->chipset->set_baudrate_command 1095 && hci_stack->hci_transport->set_baudrate 1096 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1097 if (need_baud_change) { 1098 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1099 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1100 hci_stack->hci_transport->set_baudrate(baud_rate); 1101 } 1102 1103 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1104 // -> Work around: wait a few milliseconds here. 1105 log_info("BCM delay after init script"); 1106 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1107 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1108 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1109 btstack_run_loop_add_timer(&hci_stack->timeout); 1110 break; 1111 } 1112 } 1113 // otherwise continue 1114 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1115 hci_send_cmd(&hci_read_local_supported_commands); 1116 break; 1117 case HCI_INIT_SET_BD_ADDR: 1118 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1119 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1120 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1121 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1122 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1123 break; 1124 #endif 1125 1126 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1127 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1128 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1129 hci_send_cmd(&hci_read_local_supported_commands); 1130 break; 1131 case HCI_INIT_READ_BD_ADDR: 1132 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1133 hci_send_cmd(&hci_read_bd_addr); 1134 break; 1135 case HCI_INIT_READ_BUFFER_SIZE: 1136 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1137 hci_send_cmd(&hci_read_buffer_size); 1138 break; 1139 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1140 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1141 hci_send_cmd(&hci_read_local_supported_features); 1142 break; 1143 case HCI_INIT_SET_EVENT_MASK: 1144 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1145 if (hci_le_supported()){ 1146 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1147 } else { 1148 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1149 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1150 } 1151 break; 1152 #ifdef ENABLE_CLASSIC 1153 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1154 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1155 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1156 break; 1157 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1158 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1159 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1160 break; 1161 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1162 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1163 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1164 break; 1165 case HCI_INIT_WRITE_LOCAL_NAME: 1166 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1167 if (hci_stack->local_name){ 1168 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1169 } else { 1170 char local_name[8+17+1]; 1171 // BTstack 11:22:33:44:55:66 1172 memcpy(local_name, "BTstack ", 8); 1173 memcpy(&local_name[8], bd_addr_to_str(hci_stack->local_bd_addr), 17); // strlen(bd_addr_to_str(...)) = 17 1174 local_name[8+17] = '\0'; 1175 log_info("---> Name %s", local_name); 1176 hci_send_cmd(&hci_write_local_name, local_name); 1177 } 1178 break; 1179 case HCI_INIT_WRITE_EIR_DATA: 1180 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1181 hci_send_cmd(&hci_write_extended_inquiry_response, 0, hci_stack->eir_data); 1182 break; 1183 case HCI_INIT_WRITE_INQUIRY_MODE: 1184 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1185 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1186 break; 1187 case HCI_INIT_WRITE_SCAN_ENABLE: 1188 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1189 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1190 break; 1191 // only sent if ENABLE_SCO_OVER_HCI is defined 1192 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1193 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1194 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1195 break; 1196 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1197 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1198 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1199 break; 1200 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1201 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1202 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1203 log_info("BCM: Route SCO data via HCI transport"); 1204 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1205 break; 1206 1207 #endif 1208 #ifdef ENABLE_BLE 1209 // LE INIT 1210 case HCI_INIT_LE_READ_BUFFER_SIZE: 1211 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1212 hci_send_cmd(&hci_le_read_buffer_size); 1213 break; 1214 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1215 // LE Supported Host = 1, Simultaneous Host = 0 1216 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1217 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1218 break; 1219 #ifdef ENABLE_LE_CENTRAL 1220 case HCI_INIT_READ_WHITE_LIST_SIZE: 1221 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1222 hci_send_cmd(&hci_le_read_white_list_size); 1223 break; 1224 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1225 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1226 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1227 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1228 break; 1229 #endif 1230 #endif 1231 default: 1232 return; 1233 } 1234 } 1235 1236 static void hci_init_done(void){ 1237 // done. tell the app 1238 log_info("hci_init_done -> HCI_STATE_WORKING"); 1239 hci_stack->state = HCI_STATE_WORKING; 1240 hci_emit_state(); 1241 hci_run(); 1242 } 1243 1244 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1245 UNUSED(size); 1246 1247 uint8_t command_completed = 0; 1248 1249 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1250 uint16_t opcode = little_endian_read_16(packet,3); 1251 if (opcode == hci_stack->last_cmd_opcode){ 1252 command_completed = 1; 1253 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1254 } else { 1255 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1256 } 1257 } 1258 1259 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1260 uint8_t status = packet[2]; 1261 uint16_t opcode = little_endian_read_16(packet,4); 1262 if (opcode == hci_stack->last_cmd_opcode){ 1263 if (status){ 1264 command_completed = 1; 1265 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1266 } else { 1267 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1268 } 1269 } else { 1270 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1271 } 1272 } 1273 1274 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1275 1276 // Vendor == CSR 1277 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1278 // TODO: track actual command 1279 command_completed = 1; 1280 } 1281 1282 // Vendor == Toshiba 1283 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1284 // TODO: track actual command 1285 command_completed = 1; 1286 } 1287 1288 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1289 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1290 // 1291 // HCI Reset 1292 // Timeout 100 ms 1293 // HCI Reset 1294 // Command Complete Reset 1295 // HCI Read Local Version Information 1296 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1297 // hang... 1298 // 1299 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1300 if (!command_completed 1301 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1302 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1303 1304 uint16_t opcode = little_endian_read_16(packet,3); 1305 if (opcode == hci_reset.opcode){ 1306 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1307 return; 1308 } 1309 } 1310 1311 // CSR & H5 1312 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1313 if (!command_completed 1314 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1315 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1316 1317 uint16_t opcode = little_endian_read_16(packet,3); 1318 if (opcode == hci_reset.opcode){ 1319 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1320 return; 1321 } 1322 } 1323 1324 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1325 // fix: Correct substate and behave as command below 1326 if (command_completed){ 1327 switch (hci_stack->substate){ 1328 case HCI_INIT_SEND_RESET: 1329 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1330 break; 1331 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1332 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1333 break; 1334 default: 1335 break; 1336 } 1337 } 1338 1339 #endif 1340 1341 if (!command_completed) return; 1342 1343 int need_baud_change = 0; 1344 int need_addr_change = 0; 1345 1346 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1347 need_baud_change = hci_stack->config 1348 && hci_stack->chipset 1349 && hci_stack->chipset->set_baudrate_command 1350 && hci_stack->hci_transport->set_baudrate 1351 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1352 1353 need_addr_change = hci_stack->custom_bd_addr_set 1354 && hci_stack->chipset 1355 && hci_stack->chipset->set_bd_addr_command; 1356 #endif 1357 1358 switch(hci_stack->substate){ 1359 1360 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1361 case HCI_INIT_SEND_RESET: 1362 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1363 // fix: just correct substate and behave as command below 1364 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1365 btstack_run_loop_remove_timer(&hci_stack->timeout); 1366 break; 1367 case HCI_INIT_W4_SEND_RESET: 1368 btstack_run_loop_remove_timer(&hci_stack->timeout); 1369 break; 1370 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1371 log_info("Received local name, need baud change %d", need_baud_change); 1372 if (need_baud_change){ 1373 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1374 return; 1375 } 1376 // skip baud change 1377 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1378 return; 1379 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1380 // for STLC2500D, baud rate change already happened. 1381 // for others, baud rate gets changed now 1382 if ((hci_stack->manufacturer != COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1383 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1384 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1385 hci_stack->hci_transport->set_baudrate(baud_rate); 1386 } 1387 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1388 return; 1389 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1390 btstack_run_loop_remove_timer(&hci_stack->timeout); 1391 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1392 return; 1393 case HCI_INIT_W4_CUSTOM_INIT: 1394 // repeat custom init 1395 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1396 return; 1397 #else 1398 case HCI_INIT_W4_SEND_RESET: 1399 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1400 return ; 1401 #endif 1402 1403 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1404 if (need_baud_change && hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1405 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1406 return; 1407 } 1408 if (need_addr_change){ 1409 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1410 return; 1411 } 1412 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1413 return; 1414 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1415 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1416 if (need_baud_change){ 1417 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1418 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1419 hci_stack->hci_transport->set_baudrate(baud_rate); 1420 } 1421 if (need_addr_change){ 1422 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1423 return; 1424 } 1425 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1426 return; 1427 case HCI_INIT_W4_SET_BD_ADDR: 1428 // for STLC2500D, bd addr change only gets active after sending reset command 1429 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1430 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1431 return; 1432 } 1433 // skipping st warm boot 1434 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1435 return; 1436 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1437 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1438 return; 1439 #endif 1440 case HCI_INIT_W4_READ_BD_ADDR: 1441 // only read buffer size if supported 1442 if (hci_stack->local_supported_commands[0] & 0x01) { 1443 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1444 return; 1445 } 1446 // skipping read buffer size 1447 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1448 return; 1449 case HCI_INIT_W4_SET_EVENT_MASK: 1450 // skip Classic init commands for LE only chipsets 1451 if (!hci_classic_supported()){ 1452 #ifdef ENABLE_BLE 1453 if (hci_le_supported()){ 1454 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1455 return; 1456 } 1457 #endif 1458 log_error("Neither BR/EDR nor LE supported"); 1459 hci_init_done(); 1460 return; 1461 } 1462 if (!gap_ssp_supported()){ 1463 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1464 return; 1465 } 1466 break; 1467 #ifdef ENABLE_BLE 1468 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1469 // skip write le host if not supported (e.g. on LE only EM9301) 1470 if (hci_stack->local_supported_commands[0] & 0x02) break; 1471 #ifdef ENABLE_LE_CENTRAL 1472 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1473 #else 1474 hci_init_done(); 1475 #endif 1476 return; 1477 #endif 1478 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1479 // skip write eir data if no eir data set 1480 if (hci_stack->eir_data) break; 1481 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1482 return; 1483 1484 #ifdef ENABLE_SCO_OVER_HCI 1485 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1486 // skip write synchronous flow control if not supported 1487 if (hci_stack->local_supported_commands[0] & 0x04) break; 1488 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1489 // explicit fall through to reduce repetitions 1490 1491 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1492 // skip write default erroneous data reporting if not supported 1493 if (hci_stack->local_supported_commands[0] & 0x08) break; 1494 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1495 // explicit fall through to reduce repetitions 1496 1497 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1498 // skip bcm set sco pcm config on non-Broadcom chipsets 1499 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION) break; 1500 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1501 // explicit fall through to reduce repetitions 1502 1503 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1504 if (!hci_le_supported()){ 1505 // SKIP LE init for Classic only configuration 1506 hci_init_done(); 1507 return; 1508 } 1509 break; 1510 1511 #else /* !ENABLE_SCO_OVER_HCI */ 1512 1513 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1514 #ifdef ENABLE_BLE 1515 if (hci_le_supported()){ 1516 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1517 return; 1518 } 1519 #endif 1520 // SKIP LE init for Classic only configuration 1521 hci_init_done(); 1522 return; 1523 #endif /* ENABLE_SCO_OVER_HCI */ 1524 1525 // Response to command before init done state -> init done 1526 case (HCI_INIT_DONE-1): 1527 hci_init_done(); 1528 return; 1529 1530 default: 1531 break; 1532 } 1533 hci_initializing_next_state(); 1534 } 1535 1536 static void event_handler(uint8_t *packet, int size){ 1537 1538 uint16_t event_length = packet[1]; 1539 1540 // assert packet is complete 1541 if (size != event_length + 2){ 1542 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1543 return; 1544 } 1545 1546 bd_addr_t addr; 1547 bd_addr_type_t addr_type; 1548 uint8_t link_type; 1549 hci_con_handle_t handle; 1550 hci_connection_t * conn; 1551 int i; 1552 1553 // warnings 1554 (void) link_type; 1555 1556 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1557 1558 switch (hci_event_packet_get_type(packet)) { 1559 1560 case HCI_EVENT_COMMAND_COMPLETE: 1561 // get num cmd packets - limit to 1 to reduce complexity 1562 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1563 1564 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1565 if (packet[5]) break; 1566 // terminate, name 248 chars 1567 packet[6+248] = 0; 1568 log_info("local name: %s", &packet[6]); 1569 } 1570 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1571 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1572 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1573 uint16_t acl_len = little_endian_read_16(packet, 6); 1574 uint16_t sco_len = packet[8]; 1575 1576 // determine usable ACL/SCO payload size 1577 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1578 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1579 1580 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1581 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1582 1583 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1584 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1585 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1586 } 1587 } 1588 #ifdef ENABLE_BLE 1589 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1590 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1591 hci_stack->le_acl_packets_total_num = packet[8]; 1592 // determine usable ACL payload size 1593 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1594 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1595 } 1596 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1597 } 1598 #ifdef ENABLE_LE_CENTRAL 1599 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1600 hci_stack->le_whitelist_capacity = packet[6]; 1601 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1602 } 1603 #endif 1604 #endif 1605 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1606 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1607 hci_stack->local_bd_addr); 1608 log_info("Local Address, Status: 0x%02x: Addr: %s", 1609 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1610 #ifdef ENABLE_CLASSIC 1611 if (hci_stack->link_key_db){ 1612 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1613 } 1614 #endif 1615 } 1616 #ifdef ENABLE_CLASSIC 1617 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1618 hci_emit_discoverable_enabled(hci_stack->discoverable); 1619 } 1620 #endif 1621 1622 // Note: HCI init checks 1623 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1624 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1625 1626 #ifdef ENABLE_CLASSIC 1627 // determine usable ACL packet types based on host buffer size and supported features 1628 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1629 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1630 #endif 1631 // Classic/LE 1632 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1633 } 1634 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1635 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1636 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1637 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1638 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1639 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1640 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1641 } 1642 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1643 hci_stack->local_supported_commands[0] = 1644 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1645 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1646 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1647 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08); // bit 3 = Octet 18, bit 3 1648 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1649 } 1650 #ifdef ENABLE_CLASSIC 1651 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1652 if (packet[5] == 0){ 1653 hci_stack->synchronous_flow_control_enabled = 1; 1654 } 1655 } 1656 #endif 1657 break; 1658 1659 case HCI_EVENT_COMMAND_STATUS: 1660 // get num cmd packets - limit to 1 to reduce complexity 1661 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1662 break; 1663 1664 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1665 int offset = 3; 1666 for (i=0; i<packet[2];i++){ 1667 handle = little_endian_read_16(packet, offset); 1668 offset += 2; 1669 uint16_t num_packets = little_endian_read_16(packet, offset); 1670 offset += 2; 1671 1672 conn = hci_connection_for_handle(handle); 1673 if (!conn){ 1674 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1675 continue; 1676 } 1677 1678 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1679 #ifdef ENABLE_CLASSIC 1680 if (conn->num_sco_packets_sent >= num_packets){ 1681 conn->num_sco_packets_sent -= num_packets; 1682 } else { 1683 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1684 conn->num_sco_packets_sent = 0; 1685 } 1686 hci_notify_if_sco_can_send_now(); 1687 #endif 1688 } else { 1689 if (conn->num_acl_packets_sent >= num_packets){ 1690 conn->num_acl_packets_sent -= num_packets; 1691 } else { 1692 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1693 conn->num_acl_packets_sent = 0; 1694 } 1695 } 1696 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1697 } 1698 break; 1699 } 1700 1701 #ifdef ENABLE_CLASSIC 1702 case HCI_EVENT_CONNECTION_REQUEST: 1703 reverse_bd_addr(&packet[2], addr); 1704 // TODO: eval COD 8-10 1705 link_type = packet[11]; 1706 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1707 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1708 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1709 if (!conn) { 1710 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1711 } 1712 if (!conn) { 1713 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1714 hci_stack->decline_reason = 0x0d; 1715 bd_addr_copy(hci_stack->decline_addr, addr); 1716 break; 1717 } 1718 conn->role = HCI_ROLE_SLAVE; 1719 conn->state = RECEIVED_CONNECTION_REQUEST; 1720 // store info about eSCO 1721 if (link_type == 0x02){ 1722 conn->remote_supported_feature_eSCO = 1; 1723 } 1724 hci_run(); 1725 break; 1726 1727 case HCI_EVENT_CONNECTION_COMPLETE: 1728 // Connection management 1729 reverse_bd_addr(&packet[5], addr); 1730 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1731 addr_type = BD_ADDR_TYPE_CLASSIC; 1732 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1733 if (conn) { 1734 if (!packet[2]){ 1735 conn->state = OPEN; 1736 conn->con_handle = little_endian_read_16(packet, 3); 1737 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1738 1739 // restart timer 1740 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1741 btstack_run_loop_add_timer(&conn->timeout); 1742 1743 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1744 1745 hci_emit_nr_connections_changed(); 1746 } else { 1747 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1748 uint8_t status = packet[2]; 1749 bd_addr_t bd_address; 1750 memcpy(&bd_address, conn->address, 6); 1751 1752 // connection failed, remove entry 1753 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1754 btstack_memory_hci_connection_free( conn ); 1755 1756 // notify client if dedicated bonding 1757 if (notify_dedicated_bonding_failed){ 1758 log_info("hci notify_dedicated_bonding_failed"); 1759 hci_emit_dedicated_bonding_result(bd_address, status); 1760 } 1761 1762 // if authentication error, also delete link key 1763 if (packet[2] == 0x05) { 1764 gap_drop_link_key_for_bd_addr(addr); 1765 } 1766 } 1767 } 1768 break; 1769 1770 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1771 reverse_bd_addr(&packet[5], addr); 1772 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1773 if (packet[2]){ 1774 // connection failed 1775 break; 1776 } 1777 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1778 if (!conn) { 1779 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1780 } 1781 if (!conn) { 1782 break; 1783 } 1784 conn->state = OPEN; 1785 conn->con_handle = little_endian_read_16(packet, 3); 1786 1787 #ifdef ENABLE_SCO_OVER_HCI 1788 // update SCO 1789 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 1790 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1791 } 1792 #endif 1793 break; 1794 1795 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1796 handle = little_endian_read_16(packet, 3); 1797 conn = hci_connection_for_handle(handle); 1798 if (!conn) break; 1799 if (!packet[2]){ 1800 uint8_t * features = &packet[5]; 1801 if (features[6] & (1 << 3)){ 1802 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1803 } 1804 if (features[3] & (1<<7)){ 1805 conn->remote_supported_feature_eSCO = 1; 1806 } 1807 } 1808 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1809 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1810 if (conn->bonding_flags & BONDING_DEDICATED){ 1811 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1812 } 1813 break; 1814 1815 case HCI_EVENT_LINK_KEY_REQUEST: 1816 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1817 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1818 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1819 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1820 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1821 hci_run(); 1822 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1823 return; 1824 1825 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1826 reverse_bd_addr(&packet[2], addr); 1827 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1828 if (!conn) break; 1829 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1830 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1831 // Change Connection Encryption keeps link key type 1832 if (link_key_type != CHANGED_COMBINATION_KEY){ 1833 conn->link_key_type = link_key_type; 1834 } 1835 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1836 // still forward event to allow dismiss of pairing dialog 1837 break; 1838 } 1839 1840 case HCI_EVENT_PIN_CODE_REQUEST: 1841 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1842 // non-bondable mode: pin code negative reply will be sent 1843 if (!hci_stack->bondable){ 1844 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1845 hci_run(); 1846 return; 1847 } 1848 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1849 if (!hci_stack->link_key_db) break; 1850 hci_event_pin_code_request_get_bd_addr(packet, addr); 1851 hci_stack->link_key_db->delete_link_key(addr); 1852 break; 1853 1854 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1855 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1856 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1857 break; 1858 1859 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1860 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1861 if (!hci_stack->ssp_auto_accept) break; 1862 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1863 break; 1864 1865 case HCI_EVENT_USER_PASSKEY_REQUEST: 1866 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1867 if (!hci_stack->ssp_auto_accept) break; 1868 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1869 break; 1870 #endif 1871 1872 case HCI_EVENT_ENCRYPTION_CHANGE: 1873 handle = little_endian_read_16(packet, 3); 1874 conn = hci_connection_for_handle(handle); 1875 if (!conn) break; 1876 if (packet[2] == 0) { 1877 if (packet[5]){ 1878 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1879 } else { 1880 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1881 } 1882 } 1883 #ifdef ENABLE_CLASSIC 1884 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1885 #endif 1886 break; 1887 1888 #ifdef ENABLE_CLASSIC 1889 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1890 handle = little_endian_read_16(packet, 3); 1891 conn = hci_connection_for_handle(handle); 1892 if (!conn) break; 1893 1894 // dedicated bonding: send result and disconnect 1895 if (conn->bonding_flags & BONDING_DEDICATED){ 1896 conn->bonding_flags &= ~BONDING_DEDICATED; 1897 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1898 conn->bonding_status = packet[2]; 1899 break; 1900 } 1901 1902 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1903 // link key sufficient for requested security 1904 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1905 break; 1906 } 1907 // not enough 1908 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1909 break; 1910 #endif 1911 1912 // HCI_EVENT_DISCONNECTION_COMPLETE 1913 // has been split, to first notify stack before shutting connection down 1914 // see end of function, too. 1915 case HCI_EVENT_DISCONNECTION_COMPLETE: 1916 if (packet[2]) break; // status != 0 1917 handle = little_endian_read_16(packet, 3); 1918 // drop outgoing ACL fragments if it is for closed connection 1919 if (hci_stack->acl_fragmentation_total_size > 0) { 1920 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 1921 log_info("hci: drop fragmented ACL data for closed connection"); 1922 hci_stack->acl_fragmentation_total_size = 0; 1923 hci_stack->acl_fragmentation_pos = 0; 1924 } 1925 } 1926 1927 // re-enable advertisements for le connections if active 1928 conn = hci_connection_for_handle(handle); 1929 if (!conn) break; 1930 #ifdef ENABLE_BLE 1931 #ifdef ENABLE_LE_PERIPHERAL 1932 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1933 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1934 } 1935 #endif 1936 #endif 1937 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1938 break; 1939 1940 case HCI_EVENT_HARDWARE_ERROR: 1941 log_error("Hardware Error: 0x%02x", packet[2]); 1942 if (hci_stack->hardware_error_callback){ 1943 (*hci_stack->hardware_error_callback)(packet[2]); 1944 } else { 1945 // if no special requests, just reboot stack 1946 hci_power_control_off(); 1947 hci_power_control_on(); 1948 } 1949 break; 1950 1951 #ifdef ENABLE_CLASSIC 1952 case HCI_EVENT_ROLE_CHANGE: 1953 if (packet[2]) break; // status != 0 1954 handle = little_endian_read_16(packet, 3); 1955 conn = hci_connection_for_handle(handle); 1956 if (!conn) break; // no conn 1957 conn->role = packet[9]; 1958 break; 1959 #endif 1960 1961 case HCI_EVENT_TRANSPORT_PACKET_SENT: 1962 // release packet buffer only for asynchronous transport and if there are not further fragements 1963 if (hci_transport_synchronous()) { 1964 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 1965 return; // instead of break: to avoid re-entering hci_run() 1966 } 1967 if (hci_stack->acl_fragmentation_total_size) break; 1968 hci_release_packet_buffer(); 1969 1970 // L2CAP receives this event via the hci_emit_event below 1971 1972 #ifdef ENABLE_CLASSIC 1973 // For SCO, we do the can_send_now_check here 1974 hci_notify_if_sco_can_send_now(); 1975 #endif 1976 break; 1977 1978 #ifdef ENABLE_CLASSIC 1979 case HCI_EVENT_SCO_CAN_SEND_NOW: 1980 // For SCO, we do the can_send_now_check here 1981 hci_notify_if_sco_can_send_now(); 1982 return; 1983 #endif 1984 1985 #ifdef ENABLE_BLE 1986 case HCI_EVENT_LE_META: 1987 switch (packet[2]){ 1988 #ifdef ENABLE_LE_CENTRAL 1989 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1990 // log_info("advertising report received"); 1991 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1992 le_handle_advertisement_report(packet, size); 1993 break; 1994 #endif 1995 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1996 // Connection management 1997 reverse_bd_addr(&packet[8], addr); 1998 addr_type = (bd_addr_type_t)packet[7]; 1999 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2000 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2001 #ifdef ENABLE_LE_CENTRAL 2002 // if auto-connect, remove from whitelist in both roles 2003 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2004 hci_remove_from_whitelist(addr_type, addr); 2005 } 2006 // handle error: error is reported only to the initiator -> outgoing connection 2007 if (packet[3]){ 2008 // outgoing connection establishment is done 2009 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2010 // remove entry 2011 if (conn){ 2012 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2013 btstack_memory_hci_connection_free( conn ); 2014 } 2015 break; 2016 } 2017 #endif 2018 // on success, both hosts receive connection complete event 2019 if (packet[6] == HCI_ROLE_MASTER){ 2020 #ifdef ENABLE_LE_CENTRAL 2021 // if we're master, it was an outgoing connection and we're done with it 2022 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2023 #endif 2024 } else { 2025 #ifdef ENABLE_LE_PERIPHERAL 2026 // if we're slave, it was an incoming connection, advertisements have stopped 2027 hci_stack->le_advertisements_active = 0; 2028 // try to re-enable them 2029 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2030 #endif 2031 } 2032 // LE connections are auto-accepted, so just create a connection if there isn't one already 2033 if (!conn){ 2034 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2035 } 2036 // no memory, sorry. 2037 if (!conn){ 2038 break; 2039 } 2040 2041 conn->state = OPEN; 2042 conn->role = packet[6]; 2043 conn->con_handle = little_endian_read_16(packet, 4); 2044 2045 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2046 2047 // restart timer 2048 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2049 // btstack_run_loop_add_timer(&conn->timeout); 2050 2051 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2052 2053 hci_emit_nr_connections_changed(); 2054 break; 2055 2056 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2057 2058 default: 2059 break; 2060 } 2061 break; 2062 #endif 2063 default: 2064 break; 2065 } 2066 2067 // handle BT initialization 2068 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2069 hci_initializing_event_handler(packet, size); 2070 } 2071 2072 // help with BT sleep 2073 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2074 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2075 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2076 hci_initializing_next_state(); 2077 } 2078 2079 // notify upper stack 2080 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2081 2082 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2083 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2084 if (!packet[2]){ 2085 handle = little_endian_read_16(packet, 3); 2086 hci_connection_t * aConn = hci_connection_for_handle(handle); 2087 if (aConn) { 2088 uint8_t status = aConn->bonding_status; 2089 uint16_t flags = aConn->bonding_flags; 2090 bd_addr_t bd_address; 2091 memcpy(&bd_address, aConn->address, 6); 2092 hci_shutdown_connection(aConn); 2093 // connection struct is gone, don't access anymore 2094 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2095 hci_emit_dedicated_bonding_result(bd_address, status); 2096 } 2097 } 2098 } 2099 } 2100 2101 // execute main loop 2102 hci_run(); 2103 } 2104 2105 #ifdef ENABLE_CLASSIC 2106 static void sco_handler(uint8_t * packet, uint16_t size){ 2107 if (!hci_stack->sco_packet_handler) return; 2108 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2109 } 2110 #endif 2111 2112 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2113 hci_dump_packet(packet_type, 1, packet, size); 2114 switch (packet_type) { 2115 case HCI_EVENT_PACKET: 2116 event_handler(packet, size); 2117 break; 2118 case HCI_ACL_DATA_PACKET: 2119 acl_handler(packet, size); 2120 break; 2121 #ifdef ENABLE_CLASSIC 2122 case HCI_SCO_DATA_PACKET: 2123 sco_handler(packet, size); 2124 break; 2125 #endif 2126 default: 2127 break; 2128 } 2129 } 2130 2131 /** 2132 * @brief Add event packet handler. 2133 */ 2134 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2135 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2136 } 2137 2138 2139 /** Register HCI packet handlers */ 2140 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2141 hci_stack->acl_packet_handler = handler; 2142 } 2143 2144 #ifdef ENABLE_CLASSIC 2145 /** 2146 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2147 */ 2148 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2149 hci_stack->sco_packet_handler = handler; 2150 } 2151 #endif 2152 2153 static void hci_state_reset(void){ 2154 // no connections yet 2155 hci_stack->connections = NULL; 2156 2157 // keep discoverable/connectable as this has been requested by the client(s) 2158 // hci_stack->discoverable = 0; 2159 // hci_stack->connectable = 0; 2160 // hci_stack->bondable = 1; 2161 // hci_stack->own_addr_type = 0; 2162 2163 // buffer is free 2164 hci_stack->hci_packet_buffer_reserved = 0; 2165 2166 // no pending cmds 2167 hci_stack->decline_reason = 0; 2168 hci_stack->new_scan_enable_value = 0xff; 2169 2170 // LE 2171 #ifdef ENABLE_BLE 2172 memset(hci_stack->le_random_address, 0, 6); 2173 hci_stack->le_random_address_set = 0; 2174 #endif 2175 #ifdef ENABLE_LE_CENTRAL 2176 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2177 hci_stack->le_scan_type = 0xff; 2178 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2179 hci_stack->le_whitelist = 0; 2180 hci_stack->le_whitelist_capacity = 0; 2181 #endif 2182 2183 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2184 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2185 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2186 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2187 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2188 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2189 } 2190 2191 #ifdef ENABLE_CLASSIC 2192 /** 2193 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2194 */ 2195 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2196 // store and open remote device db 2197 hci_stack->link_key_db = link_key_db; 2198 if (hci_stack->link_key_db) { 2199 hci_stack->link_key_db->open(); 2200 } 2201 } 2202 #endif 2203 2204 void hci_init(const hci_transport_t *transport, const void *config){ 2205 2206 #ifdef HAVE_MALLOC 2207 if (!hci_stack) { 2208 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2209 } 2210 #else 2211 hci_stack = &hci_stack_static; 2212 #endif 2213 memset(hci_stack, 0, sizeof(hci_stack_t)); 2214 2215 // reference to use transport layer implementation 2216 hci_stack->hci_transport = transport; 2217 2218 // reference to used config 2219 hci_stack->config = config; 2220 2221 // setup pointer for outgoing packet buffer 2222 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2223 2224 // max acl payload size defined in config.h 2225 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2226 2227 // register packet handlers with transport 2228 transport->register_packet_handler(&packet_handler); 2229 2230 hci_stack->state = HCI_STATE_OFF; 2231 2232 // class of device 2233 hci_stack->class_of_device = 0x007a020c; // Smartphone 2234 2235 // bondable by default 2236 hci_stack->bondable = 1; 2237 2238 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2239 hci_stack->ssp_enable = 1; 2240 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2241 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2242 hci_stack->ssp_auto_accept = 1; 2243 2244 // voice setting - signed 16 bit pcm data with CVSD over the air 2245 hci_stack->sco_voice_setting = 0x60; 2246 2247 hci_state_reset(); 2248 } 2249 2250 /** 2251 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2252 */ 2253 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2254 hci_stack->chipset = chipset_driver; 2255 2256 // reset chipset driver - init is also called on power_up 2257 if (hci_stack->chipset && hci_stack->chipset->init){ 2258 hci_stack->chipset->init(hci_stack->config); 2259 } 2260 } 2261 2262 /** 2263 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2264 */ 2265 void hci_set_control(const btstack_control_t *hardware_control){ 2266 // references to used control implementation 2267 hci_stack->control = hardware_control; 2268 // init with transport config 2269 hardware_control->init(hci_stack->config); 2270 } 2271 2272 void hci_close(void){ 2273 // close remote device db 2274 if (hci_stack->link_key_db) { 2275 hci_stack->link_key_db->close(); 2276 } 2277 2278 btstack_linked_list_iterator_t lit; 2279 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2280 while (btstack_linked_list_iterator_has_next(&lit)){ 2281 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2282 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2283 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2284 hci_shutdown_connection(connection); 2285 } 2286 2287 hci_power_control(HCI_POWER_OFF); 2288 2289 #ifdef HAVE_MALLOC 2290 free(hci_stack); 2291 #endif 2292 hci_stack = NULL; 2293 } 2294 2295 #ifdef ENABLE_CLASSIC 2296 void gap_set_class_of_device(uint32_t class_of_device){ 2297 hci_stack->class_of_device = class_of_device; 2298 } 2299 2300 void hci_disable_l2cap_timeout_check(void){ 2301 disable_l2cap_timeouts = 1; 2302 } 2303 #endif 2304 2305 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2306 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2307 void hci_set_bd_addr(bd_addr_t addr){ 2308 memcpy(hci_stack->custom_bd_addr, addr, 6); 2309 hci_stack->custom_bd_addr_set = 1; 2310 } 2311 #endif 2312 2313 // State-Module-Driver overview 2314 // state module low-level 2315 // HCI_STATE_OFF off close 2316 // HCI_STATE_INITIALIZING, on open 2317 // HCI_STATE_WORKING, on open 2318 // HCI_STATE_HALTING, on open 2319 // HCI_STATE_SLEEPING, off/sleep close 2320 // HCI_STATE_FALLING_ASLEEP on open 2321 2322 static int hci_power_control_on(void){ 2323 2324 // power on 2325 int err = 0; 2326 if (hci_stack->control && hci_stack->control->on){ 2327 err = (*hci_stack->control->on)(); 2328 } 2329 if (err){ 2330 log_error( "POWER_ON failed"); 2331 hci_emit_hci_open_failed(); 2332 return err; 2333 } 2334 2335 // int chipset driver 2336 if (hci_stack->chipset && hci_stack->chipset->init){ 2337 hci_stack->chipset->init(hci_stack->config); 2338 } 2339 2340 // init transport 2341 if (hci_stack->hci_transport->init){ 2342 hci_stack->hci_transport->init(hci_stack->config); 2343 } 2344 2345 // open transport 2346 err = hci_stack->hci_transport->open(); 2347 if (err){ 2348 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2349 if (hci_stack->control && hci_stack->control->off){ 2350 (*hci_stack->control->off)(); 2351 } 2352 hci_emit_hci_open_failed(); 2353 return err; 2354 } 2355 return 0; 2356 } 2357 2358 static void hci_power_control_off(void){ 2359 2360 log_info("hci_power_control_off"); 2361 2362 // close low-level device 2363 hci_stack->hci_transport->close(); 2364 2365 log_info("hci_power_control_off - hci_transport closed"); 2366 2367 // power off 2368 if (hci_stack->control && hci_stack->control->off){ 2369 (*hci_stack->control->off)(); 2370 } 2371 2372 log_info("hci_power_control_off - control closed"); 2373 2374 hci_stack->state = HCI_STATE_OFF; 2375 } 2376 2377 static void hci_power_control_sleep(void){ 2378 2379 log_info("hci_power_control_sleep"); 2380 2381 #if 0 2382 // don't close serial port during sleep 2383 2384 // close low-level device 2385 hci_stack->hci_transport->close(hci_stack->config); 2386 #endif 2387 2388 // sleep mode 2389 if (hci_stack->control && hci_stack->control->sleep){ 2390 (*hci_stack->control->sleep)(); 2391 } 2392 2393 hci_stack->state = HCI_STATE_SLEEPING; 2394 } 2395 2396 static int hci_power_control_wake(void){ 2397 2398 log_info("hci_power_control_wake"); 2399 2400 // wake on 2401 if (hci_stack->control && hci_stack->control->wake){ 2402 (*hci_stack->control->wake)(); 2403 } 2404 2405 #if 0 2406 // open low-level device 2407 int err = hci_stack->hci_transport->open(hci_stack->config); 2408 if (err){ 2409 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2410 if (hci_stack->control && hci_stack->control->off){ 2411 (*hci_stack->control->off)(); 2412 } 2413 hci_emit_hci_open_failed(); 2414 return err; 2415 } 2416 #endif 2417 2418 return 0; 2419 } 2420 2421 static void hci_power_transition_to_initializing(void){ 2422 // set up state machine 2423 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2424 hci_stack->hci_packet_buffer_reserved = 0; 2425 hci_stack->state = HCI_STATE_INITIALIZING; 2426 hci_stack->substate = HCI_INIT_SEND_RESET; 2427 } 2428 2429 int hci_power_control(HCI_POWER_MODE power_mode){ 2430 2431 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2432 2433 int err = 0; 2434 switch (hci_stack->state){ 2435 2436 case HCI_STATE_OFF: 2437 switch (power_mode){ 2438 case HCI_POWER_ON: 2439 err = hci_power_control_on(); 2440 if (err) { 2441 log_error("hci_power_control_on() error %d", err); 2442 return err; 2443 } 2444 hci_power_transition_to_initializing(); 2445 break; 2446 case HCI_POWER_OFF: 2447 // do nothing 2448 break; 2449 case HCI_POWER_SLEEP: 2450 // do nothing (with SLEEP == OFF) 2451 break; 2452 } 2453 break; 2454 2455 case HCI_STATE_INITIALIZING: 2456 switch (power_mode){ 2457 case HCI_POWER_ON: 2458 // do nothing 2459 break; 2460 case HCI_POWER_OFF: 2461 // no connections yet, just turn it off 2462 hci_power_control_off(); 2463 break; 2464 case HCI_POWER_SLEEP: 2465 // no connections yet, just turn it off 2466 hci_power_control_sleep(); 2467 break; 2468 } 2469 break; 2470 2471 case HCI_STATE_WORKING: 2472 switch (power_mode){ 2473 case HCI_POWER_ON: 2474 // do nothing 2475 break; 2476 case HCI_POWER_OFF: 2477 // see hci_run 2478 hci_stack->state = HCI_STATE_HALTING; 2479 break; 2480 case HCI_POWER_SLEEP: 2481 // see hci_run 2482 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2483 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2484 break; 2485 } 2486 break; 2487 2488 case HCI_STATE_HALTING: 2489 switch (power_mode){ 2490 case HCI_POWER_ON: 2491 hci_power_transition_to_initializing(); 2492 break; 2493 case HCI_POWER_OFF: 2494 // do nothing 2495 break; 2496 case HCI_POWER_SLEEP: 2497 // see hci_run 2498 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2499 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2500 break; 2501 } 2502 break; 2503 2504 case HCI_STATE_FALLING_ASLEEP: 2505 switch (power_mode){ 2506 case HCI_POWER_ON: 2507 2508 #ifdef HAVE_PLATFORM_IPHONE_OS 2509 // nothing to do, if H4 supports power management 2510 if (btstack_control_iphone_power_management_enabled()){ 2511 hci_stack->state = HCI_STATE_INITIALIZING; 2512 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2513 break; 2514 } 2515 #endif 2516 hci_power_transition_to_initializing(); 2517 break; 2518 case HCI_POWER_OFF: 2519 // see hci_run 2520 hci_stack->state = HCI_STATE_HALTING; 2521 break; 2522 case HCI_POWER_SLEEP: 2523 // do nothing 2524 break; 2525 } 2526 break; 2527 2528 case HCI_STATE_SLEEPING: 2529 switch (power_mode){ 2530 case HCI_POWER_ON: 2531 2532 #ifdef HAVE_PLATFORM_IPHONE_OS 2533 // nothing to do, if H4 supports power management 2534 if (btstack_control_iphone_power_management_enabled()){ 2535 hci_stack->state = HCI_STATE_INITIALIZING; 2536 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2537 hci_update_scan_enable(); 2538 break; 2539 } 2540 #endif 2541 err = hci_power_control_wake(); 2542 if (err) return err; 2543 hci_power_transition_to_initializing(); 2544 break; 2545 case HCI_POWER_OFF: 2546 hci_stack->state = HCI_STATE_HALTING; 2547 break; 2548 case HCI_POWER_SLEEP: 2549 // do nothing 2550 break; 2551 } 2552 break; 2553 } 2554 2555 // create internal event 2556 hci_emit_state(); 2557 2558 // trigger next/first action 2559 hci_run(); 2560 2561 return 0; 2562 } 2563 2564 2565 #ifdef ENABLE_CLASSIC 2566 2567 static void hci_update_scan_enable(void){ 2568 // 2 = page scan, 1 = inq scan 2569 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2570 hci_run(); 2571 } 2572 2573 void gap_discoverable_control(uint8_t enable){ 2574 if (enable) enable = 1; // normalize argument 2575 2576 if (hci_stack->discoverable == enable){ 2577 hci_emit_discoverable_enabled(hci_stack->discoverable); 2578 return; 2579 } 2580 2581 hci_stack->discoverable = enable; 2582 hci_update_scan_enable(); 2583 } 2584 2585 void gap_connectable_control(uint8_t enable){ 2586 if (enable) enable = 1; // normalize argument 2587 2588 // don't emit event 2589 if (hci_stack->connectable == enable) return; 2590 2591 hci_stack->connectable = enable; 2592 hci_update_scan_enable(); 2593 } 2594 #endif 2595 2596 void gap_local_bd_addr(bd_addr_t address_buffer){ 2597 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2598 } 2599 2600 static void hci_run(void){ 2601 2602 // log_info("hci_run: entered"); 2603 btstack_linked_item_t * it; 2604 2605 // send continuation fragments first, as they block the prepared packet buffer 2606 if (hci_stack->acl_fragmentation_total_size > 0) { 2607 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2608 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2609 if (connection) { 2610 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2611 hci_send_acl_packet_fragments(connection); 2612 return; 2613 } 2614 } else { 2615 // connection gone -> discard further fragments 2616 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2617 hci_stack->acl_fragmentation_total_size = 0; 2618 hci_stack->acl_fragmentation_pos = 0; 2619 } 2620 } 2621 2622 if (!hci_can_send_command_packet_now()) return; 2623 2624 // global/non-connection oriented commands 2625 2626 #ifdef ENABLE_CLASSIC 2627 // decline incoming connections 2628 if (hci_stack->decline_reason){ 2629 uint8_t reason = hci_stack->decline_reason; 2630 hci_stack->decline_reason = 0; 2631 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2632 return; 2633 } 2634 2635 // send scan enable 2636 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2637 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2638 hci_stack->new_scan_enable_value = 0xff; 2639 return; 2640 } 2641 #endif 2642 2643 #ifdef ENABLE_BLE 2644 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 2645 if ((hci_stack->state == HCI_STATE_WORKING) 2646 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 2647 2648 #ifdef ENABLE_LE_CENTRAL 2649 // handle le scan 2650 switch(hci_stack->le_scanning_state){ 2651 case LE_START_SCAN: 2652 hci_stack->le_scanning_state = LE_SCANNING; 2653 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2654 return; 2655 2656 case LE_STOP_SCAN: 2657 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2658 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2659 return; 2660 default: 2661 break; 2662 } 2663 if (hci_stack->le_scan_type != 0xff){ 2664 // defaults: active scanning, accept all advertisement packets 2665 int scan_type = hci_stack->le_scan_type; 2666 hci_stack->le_scan_type = 0xff; 2667 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); 2668 return; 2669 } 2670 #endif 2671 #ifdef ENABLE_LE_PERIPHERAL 2672 // le advertisement control 2673 if (hci_stack->le_advertisements_todo){ 2674 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2675 } 2676 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2677 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2678 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2679 return; 2680 } 2681 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2682 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2683 hci_send_cmd(&hci_le_set_advertising_parameters, 2684 hci_stack->le_advertisements_interval_min, 2685 hci_stack->le_advertisements_interval_max, 2686 hci_stack->le_advertisements_type, 2687 hci_stack->le_own_addr_type, 2688 hci_stack->le_advertisements_direct_address_type, 2689 hci_stack->le_advertisements_direct_address, 2690 hci_stack->le_advertisements_channel_map, 2691 hci_stack->le_advertisements_filter_policy); 2692 return; 2693 } 2694 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2695 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2696 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, hci_stack->le_advertisements_data); 2697 return; 2698 } 2699 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2700 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2701 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2702 hci_stack->le_scan_response_data); 2703 return; 2704 } 2705 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2706 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2707 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2708 return; 2709 } 2710 #endif 2711 2712 #ifdef ENABLE_LE_CENTRAL 2713 // 2714 // LE Whitelist Management 2715 // 2716 2717 // check if whitelist needs modification 2718 btstack_linked_list_iterator_t lit; 2719 int modification_pending = 0; 2720 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2721 while (btstack_linked_list_iterator_has_next(&lit)){ 2722 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2723 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2724 modification_pending = 1; 2725 break; 2726 } 2727 } 2728 2729 if (modification_pending){ 2730 // stop connnecting if modification pending 2731 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2732 hci_send_cmd(&hci_le_create_connection_cancel); 2733 return; 2734 } 2735 2736 // add/remove entries 2737 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2738 while (btstack_linked_list_iterator_has_next(&lit)){ 2739 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2740 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2741 entry->state = LE_WHITELIST_ON_CONTROLLER; 2742 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2743 return; 2744 2745 } 2746 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2747 bd_addr_t address; 2748 bd_addr_type_t address_type = entry->address_type; 2749 memcpy(address, entry->address, 6); 2750 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2751 btstack_memory_whitelist_entry_free(entry); 2752 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2753 return; 2754 } 2755 } 2756 } 2757 2758 // start connecting 2759 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2760 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2761 bd_addr_t null_addr; 2762 memset(null_addr, 0, 6); 2763 hci_send_cmd(&hci_le_create_connection, 2764 0x0060, // scan interval: 60 ms 2765 0x0030, // scan interval: 30 ms 2766 1, // use whitelist 2767 0, // peer address type 2768 null_addr, // peer bd addr 2769 hci_stack->le_own_addr_type, // our addr type: 2770 0x0008, // conn interval min 2771 0x0018, // conn interval max 2772 0, // conn latency 2773 0x0048, // supervision timeout 2774 0x0001, // min ce length 2775 0x0001 // max ce length 2776 ); 2777 return; 2778 } 2779 #endif 2780 } 2781 #endif 2782 2783 // send pending HCI commands 2784 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2785 hci_connection_t * connection = (hci_connection_t *) it; 2786 2787 switch(connection->state){ 2788 case SEND_CREATE_CONNECTION: 2789 switch(connection->address_type){ 2790 #ifdef ENABLE_CLASSIC 2791 case BD_ADDR_TYPE_CLASSIC: 2792 log_info("sending hci_create_connection"); 2793 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2794 break; 2795 #endif 2796 default: 2797 #ifdef ENABLE_BLE 2798 #ifdef ENABLE_LE_CENTRAL 2799 log_info("sending hci_le_create_connection"); 2800 hci_send_cmd(&hci_le_create_connection, 2801 0x0060, // scan interval: 60 ms 2802 0x0030, // scan interval: 30 ms 2803 0, // don't use whitelist 2804 connection->address_type, // peer address type 2805 connection->address, // peer bd addr 2806 hci_stack->le_own_addr_type, // our addr type: 2807 0x0008, // conn interval min 2808 0x0018, // conn interval max 2809 0, // conn latency 2810 0x0048, // supervision timeout 2811 0x0001, // min ce length 2812 0x0001 // max ce length 2813 ); 2814 2815 connection->state = SENT_CREATE_CONNECTION; 2816 #endif 2817 #endif 2818 break; 2819 } 2820 return; 2821 2822 #ifdef ENABLE_CLASSIC 2823 case RECEIVED_CONNECTION_REQUEST: 2824 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2825 connection->state = ACCEPTED_CONNECTION_REQUEST; 2826 connection->role = HCI_ROLE_SLAVE; 2827 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2828 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2829 } 2830 return; 2831 #endif 2832 2833 #ifdef ENABLE_BLE 2834 #ifdef ENABLE_LE_CENTRAL 2835 case SEND_CANCEL_CONNECTION: 2836 connection->state = SENT_CANCEL_CONNECTION; 2837 hci_send_cmd(&hci_le_create_connection_cancel); 2838 return; 2839 #endif 2840 #endif 2841 case SEND_DISCONNECT: 2842 connection->state = SENT_DISCONNECT; 2843 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2844 return; 2845 2846 default: 2847 break; 2848 } 2849 2850 #ifdef ENABLE_CLASSIC 2851 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2852 log_info("responding to link key request"); 2853 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2854 link_key_t link_key; 2855 link_key_type_t link_key_type; 2856 if ( hci_stack->link_key_db 2857 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 2858 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2859 connection->link_key_type = link_key_type; 2860 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2861 } else { 2862 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2863 } 2864 return; 2865 } 2866 2867 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2868 log_info("denying to pin request"); 2869 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2870 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2871 return; 2872 } 2873 2874 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2875 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2876 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2877 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2878 // tweak authentication requirements 2879 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2880 if (connection->bonding_flags & BONDING_DEDICATED){ 2881 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2882 } 2883 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2884 authreq |= 1; 2885 } 2886 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2887 } else { 2888 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2889 } 2890 return; 2891 } 2892 2893 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2894 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2895 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2896 return; 2897 } 2898 2899 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2900 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2901 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2902 return; 2903 } 2904 2905 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2906 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2907 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2908 return; 2909 } 2910 2911 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2912 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2913 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2914 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2915 return; 2916 } 2917 2918 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2919 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2920 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2921 return; 2922 } 2923 2924 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2925 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2926 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2927 return; 2928 } 2929 #endif 2930 2931 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2932 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2933 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2934 return; 2935 } 2936 2937 #ifdef ENABLE_BLE 2938 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2939 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2940 2941 uint16_t connection_interval_min = connection->le_conn_interval_min; 2942 connection->le_conn_interval_min = 0; 2943 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2944 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2945 0x0000, 0xffff); 2946 } 2947 #endif 2948 } 2949 2950 hci_connection_t * connection; 2951 switch (hci_stack->state){ 2952 case HCI_STATE_INITIALIZING: 2953 hci_initializing_run(); 2954 break; 2955 2956 case HCI_STATE_HALTING: 2957 2958 log_info("HCI_STATE_HALTING"); 2959 2960 // free whitelist entries 2961 #ifdef ENABLE_BLE 2962 #ifdef ENABLE_LE_CENTRAL 2963 { 2964 btstack_linked_list_iterator_t lit; 2965 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2966 while (btstack_linked_list_iterator_has_next(&lit)){ 2967 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2968 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2969 btstack_memory_whitelist_entry_free(entry); 2970 } 2971 } 2972 #endif 2973 #endif 2974 // close all open connections 2975 connection = (hci_connection_t *) hci_stack->connections; 2976 if (connection){ 2977 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 2978 if (!hci_can_send_command_packet_now()) return; 2979 2980 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2981 2982 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2983 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2984 2985 // ... which would be ignored anyway as we shutdown (free) the connection now 2986 hci_shutdown_connection(connection); 2987 2988 // finally, send the disconnect command 2989 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2990 return; 2991 } 2992 log_info("HCI_STATE_HALTING, calling off"); 2993 2994 // switch mode 2995 hci_power_control_off(); 2996 2997 log_info("HCI_STATE_HALTING, emitting state"); 2998 hci_emit_state(); 2999 log_info("HCI_STATE_HALTING, done"); 3000 break; 3001 3002 case HCI_STATE_FALLING_ASLEEP: 3003 switch(hci_stack->substate) { 3004 case HCI_FALLING_ASLEEP_DISCONNECT: 3005 log_info("HCI_STATE_FALLING_ASLEEP"); 3006 // close all open connections 3007 connection = (hci_connection_t *) hci_stack->connections; 3008 3009 #ifdef HAVE_PLATFORM_IPHONE_OS 3010 // don't close connections, if H4 supports power management 3011 if (btstack_control_iphone_power_management_enabled()){ 3012 connection = NULL; 3013 } 3014 #endif 3015 if (connection){ 3016 3017 // send disconnect 3018 if (!hci_can_send_command_packet_now()) return; 3019 3020 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3021 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3022 3023 // send disconnected event right away - causes higher layer connections to get closed, too. 3024 hci_shutdown_connection(connection); 3025 return; 3026 } 3027 3028 if (hci_classic_supported()){ 3029 // disable page and inquiry scan 3030 if (!hci_can_send_command_packet_now()) return; 3031 3032 log_info("HCI_STATE_HALTING, disabling inq scans"); 3033 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3034 3035 // continue in next sub state 3036 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3037 break; 3038 } 3039 // no break - fall through for ble-only chips 3040 3041 case HCI_FALLING_ASLEEP_COMPLETE: 3042 log_info("HCI_STATE_HALTING, calling sleep"); 3043 #ifdef HAVE_PLATFORM_IPHONE_OS 3044 // don't actually go to sleep, if H4 supports power management 3045 if (btstack_control_iphone_power_management_enabled()){ 3046 // SLEEP MODE reached 3047 hci_stack->state = HCI_STATE_SLEEPING; 3048 hci_emit_state(); 3049 break; 3050 } 3051 #endif 3052 // switch mode 3053 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3054 hci_emit_state(); 3055 break; 3056 3057 default: 3058 break; 3059 } 3060 break; 3061 3062 default: 3063 break; 3064 } 3065 } 3066 3067 int hci_send_cmd_packet(uint8_t *packet, int size){ 3068 // house-keeping 3069 3070 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3071 hci_stack->loopback_mode = packet[3]; 3072 } 3073 3074 #ifdef ENABLE_CLASSIC 3075 bd_addr_t addr; 3076 hci_connection_t * conn; 3077 3078 // create_connection? 3079 if (IS_COMMAND(packet, hci_create_connection)){ 3080 reverse_bd_addr(&packet[3], addr); 3081 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3082 3083 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3084 if (!conn){ 3085 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3086 if (!conn){ 3087 // notify client that alloc failed 3088 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3089 return 0; // don't sent packet to controller 3090 } 3091 conn->state = SEND_CREATE_CONNECTION; 3092 } 3093 log_info("conn state %u", conn->state); 3094 switch (conn->state){ 3095 // if connection active exists 3096 case OPEN: 3097 // and OPEN, emit connection complete command, don't send to controller 3098 hci_emit_connection_complete(addr, conn->con_handle, 0); 3099 return 0; 3100 case SEND_CREATE_CONNECTION: 3101 // connection created by hci, e.g. dedicated bonding 3102 break; 3103 default: 3104 // otherwise, just ignore as it is already in the open process 3105 return 0; 3106 } 3107 conn->state = SENT_CREATE_CONNECTION; 3108 } 3109 3110 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3111 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3112 } 3113 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3114 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3115 } 3116 3117 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3118 if (hci_stack->link_key_db){ 3119 reverse_bd_addr(&packet[3], addr); 3120 hci_stack->link_key_db->delete_link_key(addr); 3121 } 3122 } 3123 3124 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3125 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3126 reverse_bd_addr(&packet[3], addr); 3127 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3128 if (conn){ 3129 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3130 } 3131 } 3132 3133 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3134 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3135 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3136 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3137 reverse_bd_addr(&packet[3], addr); 3138 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3139 if (conn){ 3140 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3141 } 3142 } 3143 3144 #ifdef ENABLE_SCO_OVER_HCI 3145 // setup_synchronous_connection? Voice setting at offset 22 3146 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3147 // TODO: compare to current setting if sco connection already active 3148 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3149 } 3150 // accept_synchronus_connection? Voice setting at offset 18 3151 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3152 // TODO: compare to current setting if sco connection already active 3153 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3154 } 3155 #endif 3156 #endif 3157 3158 #ifdef ENABLE_BLE 3159 #ifdef ENABLE_LE_PERIPHERAL 3160 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3161 hci_stack->le_random_address_set = 1; 3162 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3163 } 3164 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3165 hci_stack->le_advertisements_active = packet[3]; 3166 } 3167 #endif 3168 #ifdef ENABLE_LE_CENTRAL 3169 if (IS_COMMAND(packet, hci_le_create_connection)){ 3170 // white list used? 3171 uint8_t initiator_filter_policy = packet[7]; 3172 switch (initiator_filter_policy){ 3173 case 0: 3174 // whitelist not used 3175 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3176 break; 3177 case 1: 3178 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3179 break; 3180 default: 3181 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3182 break; 3183 } 3184 } 3185 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3186 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3187 } 3188 #endif 3189 #endif 3190 3191 hci_stack->num_cmd_packets--; 3192 3193 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3194 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3195 3196 // release packet buffer for synchronous transport implementations 3197 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3198 hci_stack->hci_packet_buffer_reserved = 0; 3199 } 3200 3201 return err; 3202 } 3203 3204 // disconnect because of security block 3205 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3206 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3207 if (!connection) return; 3208 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3209 } 3210 3211 3212 // Configure Secure Simple Pairing 3213 3214 #ifdef ENABLE_CLASSIC 3215 3216 // enable will enable SSP during init 3217 void gap_ssp_set_enable(int enable){ 3218 hci_stack->ssp_enable = enable; 3219 } 3220 3221 static int hci_local_ssp_activated(void){ 3222 return gap_ssp_supported() && hci_stack->ssp_enable; 3223 } 3224 3225 // if set, BTstack will respond to io capability request using authentication requirement 3226 void gap_ssp_set_io_capability(int io_capability){ 3227 hci_stack->ssp_io_capability = io_capability; 3228 } 3229 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3230 hci_stack->ssp_authentication_requirement = authentication_requirement; 3231 } 3232 3233 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3234 void gap_ssp_set_auto_accept(int auto_accept){ 3235 hci_stack->ssp_auto_accept = auto_accept; 3236 } 3237 #endif 3238 3239 // va_list part of hci_send_cmd 3240 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3241 if (!hci_can_send_command_packet_now()){ 3242 log_error("hci_send_cmd called but cannot send packet now"); 3243 return 0; 3244 } 3245 3246 // for HCI INITIALIZATION 3247 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3248 hci_stack->last_cmd_opcode = cmd->opcode; 3249 3250 hci_reserve_packet_buffer(); 3251 uint8_t * packet = hci_stack->hci_packet_buffer; 3252 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3253 return hci_send_cmd_packet(packet, size); 3254 } 3255 3256 /** 3257 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3258 */ 3259 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3260 va_list argptr; 3261 va_start(argptr, cmd); 3262 int res = hci_send_cmd_va_arg(cmd, argptr); 3263 va_end(argptr); 3264 return res; 3265 } 3266 3267 // Create various non-HCI events. 3268 // TODO: generalize, use table similar to hci_create_command 3269 3270 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3271 // dump packet 3272 if (dump) { 3273 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3274 } 3275 3276 // dispatch to all event handlers 3277 btstack_linked_list_iterator_t it; 3278 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3279 while (btstack_linked_list_iterator_has_next(&it)){ 3280 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3281 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3282 } 3283 } 3284 3285 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3286 if (!hci_stack->acl_packet_handler) return; 3287 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3288 } 3289 3290 #ifdef ENABLE_CLASSIC 3291 static void hci_notify_if_sco_can_send_now(void){ 3292 // notify SCO sender if waiting 3293 if (!hci_stack->sco_waiting_for_can_send_now) return; 3294 if (hci_can_send_sco_packet_now()){ 3295 hci_stack->sco_waiting_for_can_send_now = 0; 3296 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3297 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3298 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3299 } 3300 } 3301 #endif 3302 3303 void hci_emit_state(void){ 3304 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3305 uint8_t event[3]; 3306 event[0] = BTSTACK_EVENT_STATE; 3307 event[1] = sizeof(event) - 2; 3308 event[2] = hci_stack->state; 3309 hci_emit_event(event, sizeof(event), 1); 3310 } 3311 3312 #ifdef ENABLE_CLASSIC 3313 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3314 uint8_t event[13]; 3315 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3316 event[1] = sizeof(event) - 2; 3317 event[2] = status; 3318 little_endian_store_16(event, 3, con_handle); 3319 reverse_bd_addr(address, &event[5]); 3320 event[11] = 1; // ACL connection 3321 event[12] = 0; // encryption disabled 3322 hci_emit_event(event, sizeof(event), 1); 3323 } 3324 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3325 if (disable_l2cap_timeouts) return; 3326 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3327 uint8_t event[4]; 3328 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3329 event[1] = sizeof(event) - 2; 3330 little_endian_store_16(event, 2, conn->con_handle); 3331 hci_emit_event(event, sizeof(event), 1); 3332 } 3333 #endif 3334 3335 #ifdef ENABLE_BLE 3336 #ifdef ENABLE_LE_CENTRAL 3337 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3338 uint8_t event[21]; 3339 event[0] = HCI_EVENT_LE_META; 3340 event[1] = sizeof(event) - 2; 3341 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3342 event[3] = status; 3343 little_endian_store_16(event, 4, con_handle); 3344 event[6] = 0; // TODO: role 3345 event[7] = address_type; 3346 reverse_bd_addr(address, &event[8]); 3347 little_endian_store_16(event, 14, 0); // interval 3348 little_endian_store_16(event, 16, 0); // latency 3349 little_endian_store_16(event, 18, 0); // supervision timeout 3350 event[20] = 0; // master clock accuracy 3351 hci_emit_event(event, sizeof(event), 1); 3352 } 3353 #endif 3354 #endif 3355 3356 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3357 uint8_t event[6]; 3358 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3359 event[1] = sizeof(event) - 2; 3360 event[2] = 0; // status = OK 3361 little_endian_store_16(event, 3, con_handle); 3362 event[5] = reason; 3363 hci_emit_event(event, sizeof(event), 1); 3364 } 3365 3366 static void hci_emit_nr_connections_changed(void){ 3367 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3368 uint8_t event[3]; 3369 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3370 event[1] = sizeof(event) - 2; 3371 event[2] = nr_hci_connections(); 3372 hci_emit_event(event, sizeof(event), 1); 3373 } 3374 3375 static void hci_emit_hci_open_failed(void){ 3376 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3377 uint8_t event[2]; 3378 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3379 event[1] = sizeof(event) - 2; 3380 hci_emit_event(event, sizeof(event), 1); 3381 } 3382 3383 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3384 log_info("hci_emit_dedicated_bonding_result %u ", status); 3385 uint8_t event[9]; 3386 int pos = 0; 3387 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3388 event[pos++] = sizeof(event) - 2; 3389 event[pos++] = status; 3390 reverse_bd_addr(address, &event[pos]); 3391 hci_emit_event(event, sizeof(event), 1); 3392 } 3393 3394 3395 #ifdef ENABLE_CLASSIC 3396 3397 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3398 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3399 uint8_t event[5]; 3400 int pos = 0; 3401 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3402 event[pos++] = sizeof(event) - 2; 3403 little_endian_store_16(event, 2, con_handle); 3404 pos += 2; 3405 event[pos++] = level; 3406 hci_emit_event(event, sizeof(event), 1); 3407 } 3408 3409 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3410 if (!connection) return LEVEL_0; 3411 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3412 return gap_security_level_for_link_key_type(connection->link_key_type); 3413 } 3414 3415 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3416 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3417 uint8_t event[3]; 3418 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3419 event[1] = sizeof(event) - 2; 3420 event[2] = enabled; 3421 hci_emit_event(event, sizeof(event), 1); 3422 } 3423 3424 #ifdef ENABLE_CLASSIC 3425 // query if remote side supports eSCO 3426 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3427 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3428 if (!connection) return 0; 3429 return connection->remote_supported_feature_eSCO; 3430 } 3431 3432 // query if remote side supports SSP 3433 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3434 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3435 if (!connection) return 0; 3436 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3437 } 3438 3439 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3440 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3441 } 3442 #endif 3443 3444 // GAP API 3445 /** 3446 * @bbrief enable/disable bonding. default is enabled 3447 * @praram enabled 3448 */ 3449 void gap_set_bondable_mode(int enable){ 3450 hci_stack->bondable = enable ? 1 : 0; 3451 } 3452 /** 3453 * @brief Get bondable mode. 3454 * @return 1 if bondable 3455 */ 3456 int gap_get_bondable_mode(void){ 3457 return hci_stack->bondable; 3458 } 3459 3460 /** 3461 * @brief map link keys to security levels 3462 */ 3463 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3464 switch (link_key_type){ 3465 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3466 return LEVEL_4; 3467 case COMBINATION_KEY: 3468 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3469 return LEVEL_3; 3470 default: 3471 return LEVEL_2; 3472 } 3473 } 3474 3475 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3476 log_info("gap_mitm_protection_required_for_security_level %u", level); 3477 return level > LEVEL_2; 3478 } 3479 3480 /** 3481 * @brief get current security level 3482 */ 3483 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3484 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3485 if (!connection) return LEVEL_0; 3486 return gap_security_level_for_connection(connection); 3487 } 3488 3489 /** 3490 * @brief request connection to device to 3491 * @result GAP_AUTHENTICATION_RESULT 3492 */ 3493 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3494 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3495 if (!connection){ 3496 hci_emit_security_level(con_handle, LEVEL_0); 3497 return; 3498 } 3499 gap_security_level_t current_level = gap_security_level(con_handle); 3500 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3501 if (current_level >= requested_level){ 3502 hci_emit_security_level(con_handle, current_level); 3503 return; 3504 } 3505 3506 connection->requested_security_level = requested_level; 3507 3508 #if 0 3509 // sending encryption request without a link key results in an error. 3510 // TODO: figure out how to use it properly 3511 3512 // would enabling ecnryption suffice (>= LEVEL_2)? 3513 if (hci_stack->link_key_db){ 3514 link_key_type_t link_key_type; 3515 link_key_t link_key; 3516 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3517 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3518 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3519 return; 3520 } 3521 } 3522 } 3523 #endif 3524 3525 // try to authenticate connection 3526 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3527 hci_run(); 3528 } 3529 3530 /** 3531 * @brief start dedicated bonding with device. disconnect after bonding 3532 * @param device 3533 * @param request MITM protection 3534 * @result GAP_DEDICATED_BONDING_COMPLETE 3535 */ 3536 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3537 3538 // create connection state machine 3539 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3540 3541 if (!connection){ 3542 return BTSTACK_MEMORY_ALLOC_FAILED; 3543 } 3544 3545 // delete linkn key 3546 gap_drop_link_key_for_bd_addr(device); 3547 3548 // configure LEVEL_2/3, dedicated bonding 3549 connection->state = SEND_CREATE_CONNECTION; 3550 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3551 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3552 connection->bonding_flags = BONDING_DEDICATED; 3553 3554 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3555 3556 // handle: connnection failure (connection complete != ok) 3557 // handle: authentication failure 3558 // handle: disconnect on done 3559 3560 hci_run(); 3561 3562 return 0; 3563 } 3564 #endif 3565 3566 void gap_set_local_name(const char * local_name){ 3567 hci_stack->local_name = local_name; 3568 } 3569 3570 3571 #ifdef ENABLE_BLE 3572 3573 #ifdef ENABLE_LE_CENTRAL 3574 void gap_start_scan(void){ 3575 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3576 hci_stack->le_scanning_state = LE_START_SCAN; 3577 hci_run(); 3578 } 3579 3580 void gap_stop_scan(void){ 3581 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3582 hci_stack->le_scanning_state = LE_STOP_SCAN; 3583 hci_run(); 3584 } 3585 3586 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3587 hci_stack->le_scan_type = scan_type; 3588 hci_stack->le_scan_interval = scan_interval; 3589 hci_stack->le_scan_window = scan_window; 3590 hci_run(); 3591 } 3592 3593 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3594 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3595 if (!conn){ 3596 log_info("gap_connect: no connection exists yet, creating context"); 3597 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3598 if (!conn){ 3599 // notify client that alloc failed 3600 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3601 log_info("gap_connect: failed to alloc hci_connection_t"); 3602 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3603 } 3604 conn->state = SEND_CREATE_CONNECTION; 3605 log_info("gap_connect: send create connection next"); 3606 hci_run(); 3607 return 0; 3608 } 3609 3610 if (!hci_is_le_connection(conn) || 3611 conn->state == SEND_CREATE_CONNECTION || 3612 conn->state == SENT_CREATE_CONNECTION) { 3613 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3614 log_error("gap_connect: classic connection or connect is already being created"); 3615 return GATT_CLIENT_IN_WRONG_STATE; 3616 } 3617 3618 log_info("gap_connect: context exists with state %u", conn->state); 3619 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3620 hci_run(); 3621 return 0; 3622 } 3623 3624 // @assumption: only a single outgoing LE Connection exists 3625 static hci_connection_t * gap_get_outgoing_connection(void){ 3626 btstack_linked_item_t *it; 3627 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3628 hci_connection_t * conn = (hci_connection_t *) it; 3629 if (!hci_is_le_connection(conn)) continue; 3630 switch (conn->state){ 3631 case SEND_CREATE_CONNECTION: 3632 case SENT_CREATE_CONNECTION: 3633 return conn; 3634 default: 3635 break; 3636 }; 3637 } 3638 return NULL; 3639 } 3640 3641 uint8_t gap_connect_cancel(void){ 3642 hci_connection_t * conn = gap_get_outgoing_connection(); 3643 if (!conn) return 0; 3644 switch (conn->state){ 3645 case SEND_CREATE_CONNECTION: 3646 // skip sending create connection and emit event instead 3647 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3648 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3649 btstack_memory_hci_connection_free( conn ); 3650 break; 3651 case SENT_CREATE_CONNECTION: 3652 // request to send cancel connection 3653 conn->state = SEND_CANCEL_CONNECTION; 3654 hci_run(); 3655 break; 3656 default: 3657 break; 3658 } 3659 return 0; 3660 } 3661 #endif 3662 3663 /** 3664 * @brief Updates the connection parameters for a given LE connection 3665 * @param handle 3666 * @param conn_interval_min (unit: 1.25ms) 3667 * @param conn_interval_max (unit: 1.25ms) 3668 * @param conn_latency 3669 * @param supervision_timeout (unit: 10ms) 3670 * @returns 0 if ok 3671 */ 3672 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3673 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3674 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3675 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3676 connection->le_conn_interval_min = conn_interval_min; 3677 connection->le_conn_interval_max = conn_interval_max; 3678 connection->le_conn_latency = conn_latency; 3679 connection->le_supervision_timeout = supervision_timeout; 3680 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3681 hci_run(); 3682 return 0; 3683 } 3684 3685 /** 3686 * @brief Request an update of the connection parameter for a given LE connection 3687 * @param handle 3688 * @param conn_interval_min (unit: 1.25ms) 3689 * @param conn_interval_max (unit: 1.25ms) 3690 * @param conn_latency 3691 * @param supervision_timeout (unit: 10ms) 3692 * @returns 0 if ok 3693 */ 3694 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3695 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3696 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3697 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3698 connection->le_conn_interval_min = conn_interval_min; 3699 connection->le_conn_interval_max = conn_interval_max; 3700 connection->le_conn_latency = conn_latency; 3701 connection->le_supervision_timeout = supervision_timeout; 3702 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3703 hci_run(); 3704 return 0; 3705 } 3706 3707 #ifdef ENABLE_LE_PERIPHERAL 3708 3709 static void gap_advertisments_changed(void){ 3710 // disable advertisements before updating adv, scan data, or adv params 3711 if (hci_stack->le_advertisements_active){ 3712 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3713 } 3714 hci_run(); 3715 } 3716 3717 /** 3718 * @brief Set Advertisement Data 3719 * @param advertising_data_length 3720 * @param advertising_data (max 31 octets) 3721 * @note data is not copied, pointer has to stay valid 3722 */ 3723 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3724 hci_stack->le_advertisements_data_len = advertising_data_length; 3725 hci_stack->le_advertisements_data = advertising_data; 3726 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3727 gap_advertisments_changed(); 3728 } 3729 3730 /** 3731 * @brief Set Scan Response Data 3732 * @param advertising_data_length 3733 * @param advertising_data (max 31 octets) 3734 * @note data is not copied, pointer has to stay valid 3735 */ 3736 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3737 hci_stack->le_scan_response_data_len = scan_response_data_length; 3738 hci_stack->le_scan_response_data = scan_response_data; 3739 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3740 gap_advertisments_changed(); 3741 } 3742 3743 /** 3744 * @brief Set Advertisement Parameters 3745 * @param adv_int_min 3746 * @param adv_int_max 3747 * @param adv_type 3748 * @param direct_address_type 3749 * @param direct_address 3750 * @param channel_map 3751 * @param filter_policy 3752 * 3753 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3754 */ 3755 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3756 uint8_t direct_address_typ, bd_addr_t direct_address, 3757 uint8_t channel_map, uint8_t filter_policy) { 3758 3759 hci_stack->le_advertisements_interval_min = adv_int_min; 3760 hci_stack->le_advertisements_interval_max = adv_int_max; 3761 hci_stack->le_advertisements_type = adv_type; 3762 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3763 hci_stack->le_advertisements_channel_map = channel_map; 3764 hci_stack->le_advertisements_filter_policy = filter_policy; 3765 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3766 3767 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3768 gap_advertisments_changed(); 3769 } 3770 3771 /** 3772 * @brief Enable/Disable Advertisements 3773 * @param enabled 3774 */ 3775 void gap_advertisements_enable(int enabled){ 3776 hci_stack->le_advertisements_enabled = enabled; 3777 if (enabled && !hci_stack->le_advertisements_active){ 3778 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3779 } 3780 if (!enabled && hci_stack->le_advertisements_active){ 3781 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3782 } 3783 hci_run(); 3784 } 3785 3786 #endif 3787 3788 void hci_le_set_own_address_type(uint8_t own_address_type){ 3789 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 3790 if (own_address_type == hci_stack->le_own_addr_type) return; 3791 hci_stack->le_own_addr_type = own_address_type; 3792 3793 #ifdef ENABLE_LE_PERIPHERAL 3794 // update advertisement parameters, too 3795 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3796 gap_advertisments_changed(); 3797 #endif 3798 #ifdef ENABLE_LE_CENTRAL 3799 // note: we don't update scan parameters or modify ongoing connection attempts 3800 #endif 3801 } 3802 3803 #endif 3804 3805 uint8_t gap_disconnect(hci_con_handle_t handle){ 3806 hci_connection_t * conn = hci_connection_for_handle(handle); 3807 if (!conn){ 3808 hci_emit_disconnection_complete(handle, 0); 3809 return 0; 3810 } 3811 conn->state = SEND_DISCONNECT; 3812 hci_run(); 3813 return 0; 3814 } 3815 3816 /** 3817 * @brief Get connection type 3818 * @param con_handle 3819 * @result connection_type 3820 */ 3821 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3822 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3823 if (!conn) return GAP_CONNECTION_INVALID; 3824 switch (conn->address_type){ 3825 case BD_ADDR_TYPE_LE_PUBLIC: 3826 case BD_ADDR_TYPE_LE_RANDOM: 3827 return GAP_CONNECTION_LE; 3828 case BD_ADDR_TYPE_SCO: 3829 return GAP_CONNECTION_SCO; 3830 case BD_ADDR_TYPE_CLASSIC: 3831 return GAP_CONNECTION_ACL; 3832 default: 3833 return GAP_CONNECTION_INVALID; 3834 } 3835 } 3836 3837 #ifdef ENABLE_BLE 3838 3839 #ifdef ENABLE_LE_CENTRAL 3840 /** 3841 * @brief Auto Connection Establishment - Start Connecting to device 3842 * @param address_typ 3843 * @param address 3844 * @returns 0 if ok 3845 */ 3846 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3847 // check capacity 3848 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 3849 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3850 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3851 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3852 entry->address_type = address_type; 3853 memcpy(entry->address, address, 6); 3854 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3855 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 3856 hci_run(); 3857 return 0; 3858 } 3859 3860 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3861 btstack_linked_list_iterator_t it; 3862 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3863 while (btstack_linked_list_iterator_has_next(&it)){ 3864 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3865 if (entry->address_type != address_type) continue; 3866 if (memcmp(entry->address, address, 6) != 0) continue; 3867 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3868 // remove from controller if already present 3869 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3870 continue; 3871 } 3872 // direclty remove entry from whitelist 3873 btstack_linked_list_iterator_remove(&it); 3874 btstack_memory_whitelist_entry_free(entry); 3875 } 3876 } 3877 3878 /** 3879 * @brief Auto Connection Establishment - Stop Connecting to device 3880 * @param address_typ 3881 * @param address 3882 * @returns 0 if ok 3883 */ 3884 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3885 hci_remove_from_whitelist(address_type, address); 3886 hci_run(); 3887 return 0; 3888 } 3889 3890 /** 3891 * @brief Auto Connection Establishment - Stop everything 3892 * @note Convenience function to stop all active auto connection attempts 3893 */ 3894 void gap_auto_connection_stop_all(void){ 3895 btstack_linked_list_iterator_t it; 3896 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3897 while (btstack_linked_list_iterator_has_next(&it)){ 3898 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3899 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3900 // remove from controller if already present 3901 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3902 continue; 3903 } 3904 // directly remove entry from whitelist 3905 btstack_linked_list_iterator_remove(&it); 3906 btstack_memory_whitelist_entry_free(entry); 3907 } 3908 hci_run(); 3909 } 3910 #endif 3911 #endif 3912 3913 #ifdef ENABLE_CLASSIC 3914 /** 3915 * @brief Set Extended Inquiry Response data 3916 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 3917 * @note has to be done before stack starts up 3918 */ 3919 void gap_set_extended_inquiry_response(const uint8_t * data){ 3920 hci_stack->eir_data = data; 3921 } 3922 3923 /** 3924 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 3925 * @param inquriy_mode see bluetooth_defines.h 3926 */ 3927 void hci_set_inquiry_mode(inquiry_mode_t mode){ 3928 hci_stack->inquiry_mode = mode; 3929 } 3930 3931 /** 3932 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3933 */ 3934 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3935 hci_stack->sco_voice_setting = voice_setting; 3936 } 3937 3938 /** 3939 * @brief Get SCO Voice Setting 3940 * @return current voice setting 3941 */ 3942 uint16_t hci_get_sco_voice_setting(void){ 3943 return hci_stack->sco_voice_setting; 3944 } 3945 3946 /** @brief Get SCO packet length for current SCO Voice setting 3947 * @note Using SCO packets of the exact length is required for USB transfer 3948 * @return Length of SCO packets in bytes (not audio frames) 3949 */ 3950 int hci_get_sco_packet_length(void){ 3951 // see Core Spec for H2 USB Transfer. 3952 if (hci_stack->sco_voice_setting & 0x0020) return 51; 3953 return 27; 3954 } 3955 #endif 3956 3957 /** 3958 * @brief Set callback for Bluetooth Hardware Error 3959 */ 3960 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 3961 hci_stack->hardware_error_callback = fn; 3962 } 3963 3964 void hci_disconnect_all(void){ 3965 btstack_linked_list_iterator_t it; 3966 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 3967 while (btstack_linked_list_iterator_has_next(&it)){ 3968 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 3969 if (con->state == SENT_DISCONNECT) continue; 3970 con->state = SEND_DISCONNECT; 3971 } 3972 hci_run(); 3973 } 3974 3975 uint16_t hci_get_manufacturer(void){ 3976 return hci_stack->manufacturer; 3977 } 3978