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 #include "hci.h" 48 #include "gap.h" 49 50 #ifdef HAVE_BLE 51 #include "gap_le.h" 52 #endif 53 54 #include <stdarg.h> 55 #include <string.h> 56 #include <stdio.h> 57 58 #ifndef EMBEDDED 59 #ifdef _WIN32 60 #include "Winsock2.h" 61 #else 62 #include <unistd.h> // gethostbyname 63 #endif 64 #include <btstack/version.h> 65 #endif 66 67 #include "btstack_memory.h" 68 #include "debug.h" 69 #include "hci_dump.h" 70 71 #include <btstack/linked_list.h> 72 #include <btstack/hci_cmds.h> 73 74 #define HCI_CONNECTION_TIMEOUT_MS 10000 75 76 #ifdef USE_BLUETOOL 77 #include "../platforms/ios/src/bt_control_iphone.h" 78 #endif 79 80 static void hci_update_scan_enable(void); 81 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 82 static void hci_connection_timeout_handler(timer_source_t *timer); 83 static void hci_connection_timestamp(hci_connection_t *connection); 84 static int hci_power_control_on(void); 85 static void hci_power_control_off(void); 86 static void hci_state_reset(void); 87 88 // the STACK is here 89 #ifndef HAVE_MALLOC 90 static hci_stack_t hci_stack_static; 91 #endif 92 static hci_stack_t * hci_stack = NULL; 93 94 // test helper 95 static uint8_t disable_l2cap_timeouts = 0; 96 97 /** 98 * create connection for given address 99 * 100 * @return connection OR NULL, if no memory left 101 */ 102 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 103 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 104 hci_connection_t * conn = btstack_memory_hci_connection_get(); 105 if (!conn) return NULL; 106 memset(conn, 0, sizeof(hci_connection_t)); 107 BD_ADDR_COPY(conn->address, addr); 108 conn->address_type = addr_type; 109 conn->con_handle = 0xffff; 110 conn->authentication_flags = AUTH_FLAGS_NONE; 111 conn->bonding_flags = 0; 112 conn->requested_security_level = LEVEL_0; 113 linked_item_set_user(&conn->timeout.item, conn); 114 conn->timeout.process = hci_connection_timeout_handler; 115 hci_connection_timestamp(conn); 116 conn->acl_recombination_length = 0; 117 conn->acl_recombination_pos = 0; 118 conn->num_acl_packets_sent = 0; 119 conn->num_sco_packets_sent = 0; 120 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 121 linked_list_add(&hci_stack->connections, (linked_item_t *) conn); 122 return conn; 123 } 124 125 126 /** 127 * get le connection parameter range 128 * 129 * @return le connection parameter range struct 130 */ 131 le_connection_parameter_range_t gap_le_get_connection_parameter_range(void){ 132 return hci_stack->le_connection_parameter_range; 133 } 134 135 /** 136 * set le connection parameter range 137 * 138 */ 139 140 void gap_le_set_connection_parameter_range(le_connection_parameter_range_t range){ 141 hci_stack->le_connection_parameter_range.le_conn_interval_min = range.le_conn_interval_min; 142 hci_stack->le_connection_parameter_range.le_conn_interval_max = range.le_conn_interval_max; 143 hci_stack->le_connection_parameter_range.le_conn_interval_min = range.le_conn_latency_min; 144 hci_stack->le_connection_parameter_range.le_conn_interval_max = range.le_conn_latency_max; 145 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = range.le_supervision_timeout_min; 146 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = range.le_supervision_timeout_max; 147 } 148 149 /** 150 * get hci connections iterator 151 * 152 * @return hci connections iterator 153 */ 154 155 void hci_connections_get_iterator(linked_list_iterator_t *it){ 156 linked_list_iterator_init(it, &hci_stack->connections); 157 } 158 159 /** 160 * get connection for a given handle 161 * 162 * @return connection OR NULL, if not found 163 */ 164 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 165 linked_list_iterator_t it; 166 linked_list_iterator_init(&it, &hci_stack->connections); 167 while (linked_list_iterator_has_next(&it)){ 168 hci_connection_t * item = (hci_connection_t *) linked_list_iterator_next(&it); 169 if ( item->con_handle == con_handle ) { 170 return item; 171 } 172 } 173 return NULL; 174 } 175 176 /** 177 * get connection for given address 178 * 179 * @return connection OR NULL, if not found 180 */ 181 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 182 linked_list_iterator_t it; 183 linked_list_iterator_init(&it, &hci_stack->connections); 184 while (linked_list_iterator_has_next(&it)){ 185 hci_connection_t * connection = (hci_connection_t *) linked_list_iterator_next(&it); 186 if (connection->address_type != addr_type) continue; 187 if (memcmp(addr, connection->address, 6) != 0) continue; 188 return connection; 189 } 190 return NULL; 191 } 192 193 static void hci_connection_timeout_handler(timer_source_t *timer){ 194 hci_connection_t * connection = (hci_connection_t *) linked_item_get_user(&timer->item); 195 #ifdef HAVE_TIME 196 struct timeval tv; 197 gettimeofday(&tv, NULL); 198 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 199 // connections might be timed out 200 hci_emit_l2cap_check_timeout(connection); 201 } 202 #endif 203 #ifdef HAVE_TICK 204 if (embedded_get_ticks() > connection->timestamp + embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 205 // connections might be timed out 206 hci_emit_l2cap_check_timeout(connection); 207 } 208 #endif 209 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 210 run_loop_add_timer(timer); 211 } 212 213 static void hci_connection_timestamp(hci_connection_t *connection){ 214 #ifdef HAVE_TIME 215 gettimeofday(&connection->timestamp, NULL); 216 #endif 217 #ifdef HAVE_TICK 218 connection->timestamp = embedded_get_ticks(); 219 #endif 220 } 221 222 223 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 224 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 225 } 226 227 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 228 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 229 } 230 231 232 /** 233 * add authentication flags and reset timer 234 * @note: assumes classic connection 235 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 236 */ 237 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 238 bd_addr_t addr; 239 bt_flip_addr(addr, bd_addr); 240 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 241 if (conn) { 242 connectionSetAuthenticationFlags(conn, flags); 243 hci_connection_timestamp(conn); 244 } 245 } 246 247 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 248 hci_connection_t * conn = hci_connection_for_handle(handle); 249 if (!conn) return 0; 250 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 251 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 252 return 0; 253 } 254 255 void hci_drop_link_key_for_bd_addr(bd_addr_t addr){ 256 if (hci_stack->remote_device_db) { 257 hci_stack->remote_device_db->delete_link_key(addr); 258 } 259 } 260 261 int hci_is_le_connection(hci_connection_t * connection){ 262 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 263 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 264 } 265 266 267 /** 268 * count connections 269 */ 270 static int nr_hci_connections(void){ 271 int count = 0; 272 linked_item_t *it; 273 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 274 return count; 275 } 276 277 /** 278 * Dummy handler called by HCI 279 */ 280 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 281 } 282 283 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 284 hci_connection_t * connection = hci_connection_for_handle(handle); 285 if (!connection) { 286 log_error("hci_number_outgoing_packets: connection for handle %u does not exist!", handle); 287 return 0; 288 } 289 return connection->num_acl_packets_sent; 290 } 291 292 uint8_t hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 293 294 int num_packets_sent_classic = 0; 295 int num_packets_sent_le = 0; 296 297 bd_addr_type_t address_type = BD_ADDR_TYPE_UNKNOWN; 298 299 linked_item_t *it; 300 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 301 hci_connection_t * connection = (hci_connection_t *) it; 302 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 303 num_packets_sent_classic += connection->num_acl_packets_sent; 304 } else { 305 num_packets_sent_le += connection->num_acl_packets_sent; 306 } 307 // ignore connections that are not open, e.g., in state RECEIVED_DISCONNECTION_COMPLETE 308 if (connection->con_handle == con_handle && connection->state == OPEN){ 309 address_type = connection->address_type; 310 } 311 } 312 313 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 314 int free_slots_le = 0; 315 316 if (free_slots_classic < 0){ 317 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); 318 return 0; 319 } 320 321 if (hci_stack->le_acl_packets_total_num){ 322 // if we have LE slots, they are used 323 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 324 if (free_slots_le < 0){ 325 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); 326 return 0; 327 } 328 } else { 329 // otherwise, classic slots are used for LE, too 330 free_slots_classic -= num_packets_sent_le; 331 if (free_slots_classic < 0){ 332 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); 333 return 0; 334 } 335 } 336 337 switch (address_type){ 338 case BD_ADDR_TYPE_UNKNOWN: 339 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 340 return 0; 341 342 case BD_ADDR_TYPE_CLASSIC: 343 return free_slots_classic; 344 345 default: 346 if (hci_stack->le_acl_packets_total_num){ 347 return free_slots_le; 348 } 349 return free_slots_classic; 350 } 351 } 352 353 int hci_number_free_sco_slots_for_handle(hci_con_handle_t handle){ 354 int num_sco_packets_sent = 0; 355 linked_item_t *it; 356 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 357 hci_connection_t * connection = (hci_connection_t *) it; 358 num_sco_packets_sent += connection->num_sco_packets_sent; 359 } 360 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 361 log_info("hci_number_free_sco_slots_for_handle: outgoing packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 362 return 0; 363 } 364 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 365 } 366 367 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 368 int hci_can_send_command_packet_now(void){ 369 if (hci_stack->hci_packet_buffer_reserved) return 0; 370 371 // check for async hci transport implementations 372 if (hci_stack->hci_transport->can_send_packet_now){ 373 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 374 return 0; 375 } 376 } 377 378 return hci_stack->num_cmd_packets > 0; 379 } 380 381 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 382 // check for async hci transport implementations 383 if (hci_stack->hci_transport->can_send_packet_now){ 384 if (!hci_stack->hci_transport->can_send_packet_now(HCI_ACL_DATA_PACKET)){ 385 return 0; 386 } 387 } 388 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 389 } 390 391 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 392 if (hci_stack->hci_packet_buffer_reserved) return 0; 393 return hci_can_send_prepared_acl_packet_now(con_handle); 394 } 395 396 int hci_can_send_prepared_sco_packet_now(hci_con_handle_t con_handle){ 397 if (hci_stack->hci_transport->can_send_packet_now){ 398 if (!hci_stack->hci_transport->can_send_packet_now(HCI_SCO_DATA_PACKET)){ 399 return 0; 400 } 401 } 402 return hci_number_free_sco_slots_for_handle(con_handle) > 0; 403 } 404 405 int hci_can_send_sco_packet_now(hci_con_handle_t con_handle){ 406 if (hci_stack->hci_packet_buffer_reserved) return 0; 407 return hci_can_send_prepared_sco_packet_now(con_handle); 408 } 409 410 // used for internal checks in l2cap[-le].c 411 int hci_is_packet_buffer_reserved(void){ 412 return hci_stack->hci_packet_buffer_reserved; 413 } 414 415 // reserves outgoing packet buffer. @returns 1 if successful 416 int hci_reserve_packet_buffer(void){ 417 if (hci_stack->hci_packet_buffer_reserved) { 418 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 419 return 0; 420 } 421 hci_stack->hci_packet_buffer_reserved = 1; 422 return 1; 423 } 424 425 void hci_release_packet_buffer(void){ 426 hci_stack->hci_packet_buffer_reserved = 0; 427 } 428 429 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 430 int hci_transport_synchronous(void){ 431 return hci_stack->hci_transport->can_send_packet_now == NULL; 432 } 433 434 uint16_t hci_max_acl_le_data_packet_length(void){ 435 return hci_stack->le_data_packets_length > 0 ? hci_stack->le_data_packets_length : hci_stack->acl_data_packet_length; 436 } 437 438 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 439 440 // 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); 441 442 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 443 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 444 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 445 max_acl_data_packet_length = hci_stack->le_data_packets_length; 446 } 447 448 // testing: reduce buffer to minimum 449 // max_acl_data_packet_length = 52; 450 451 int err; 452 // multiple packets could be send on a synchronous HCI transport 453 while (1){ 454 455 // get current data 456 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 457 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 458 int more_fragments = 0; 459 460 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 461 if (current_acl_data_packet_length > max_acl_data_packet_length){ 462 more_fragments = 1; 463 current_acl_data_packet_length = max_acl_data_packet_length; 464 } 465 466 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 467 if (acl_header_pos > 0){ 468 uint16_t handle_and_flags = READ_BT_16(hci_stack->hci_packet_buffer, 0); 469 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 470 bt_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 471 } 472 473 // update header len 474 bt_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 475 476 // count packet 477 connection->num_acl_packets_sent++; 478 479 // send packet 480 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 481 const int size = current_acl_data_packet_length + 4; 482 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 483 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 484 485 // done yet? 486 if (!more_fragments) break; 487 488 // update start of next fragment to send 489 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 490 491 // can send more? 492 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 493 } 494 495 // done 496 hci_stack->acl_fragmentation_pos = 0; 497 hci_stack->acl_fragmentation_total_size = 0; 498 499 // release buffer now for synchronous transport 500 if (hci_transport_synchronous()){ 501 hci_release_packet_buffer(); 502 // notify upper stack that iit might be possible to send again 503 uint8_t event[] = { DAEMON_EVENT_HCI_PACKET_SENT, 0}; 504 hci_stack->packet_handler(HCI_EVENT_PACKET, &event[0], sizeof(event)); 505 } 506 507 return err; 508 } 509 510 // pre: caller has reserved the packet buffer 511 int hci_send_acl_packet_buffer(int size){ 512 513 // log_info("hci_send_acl_packet_buffer size %u", size); 514 515 if (!hci_stack->hci_packet_buffer_reserved) { 516 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 517 return 0; 518 } 519 520 uint8_t * packet = hci_stack->hci_packet_buffer; 521 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 522 523 // check for free places on Bluetooth module 524 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 525 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 526 hci_release_packet_buffer(); 527 return BTSTACK_ACL_BUFFERS_FULL; 528 } 529 530 hci_connection_t *connection = hci_connection_for_handle( con_handle); 531 if (!connection) { 532 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 533 hci_release_packet_buffer(); 534 return 0; 535 } 536 hci_connection_timestamp(connection); 537 538 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 539 540 // setup data 541 hci_stack->acl_fragmentation_total_size = size; 542 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 543 544 return hci_send_acl_packet_fragments(connection); 545 } 546 547 // pre: caller has reserved the packet buffer 548 int hci_send_sco_packet_buffer(int size){ 549 550 // log_info("hci_send_acl_packet_buffer size %u", size); 551 552 if (!hci_stack->hci_packet_buffer_reserved) { 553 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 554 return 0; 555 } 556 557 uint8_t * packet = hci_stack->hci_packet_buffer; 558 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 559 560 // check for free places on Bluetooth module 561 if (!hci_can_send_prepared_sco_packet_now(con_handle)) { 562 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 563 hci_release_packet_buffer(); 564 return BTSTACK_ACL_BUFFERS_FULL; 565 } 566 567 // track send packet in connection struct 568 hci_connection_t *connection = hci_connection_for_handle( con_handle); 569 if (!connection) { 570 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 571 hci_release_packet_buffer(); 572 return 0; 573 } 574 connection->num_sco_packets_sent++; 575 576 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 577 return hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 578 } 579 580 static void acl_handler(uint8_t *packet, int size){ 581 582 // log_info("acl_handler: size %u", size); 583 584 // get info 585 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 586 hci_connection_t *conn = hci_connection_for_handle(con_handle); 587 uint8_t acl_flags = READ_ACL_FLAGS(packet); 588 uint16_t acl_length = READ_ACL_LENGTH(packet); 589 590 // ignore non-registered handle 591 if (!conn){ 592 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 593 return; 594 } 595 596 // assert packet is complete 597 if (acl_length + 4 != size){ 598 log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4); 599 return; 600 } 601 602 // update idle timestamp 603 hci_connection_timestamp(conn); 604 605 // handle different packet types 606 switch (acl_flags & 0x03) { 607 608 case 0x01: // continuation fragment 609 610 // sanity checks 611 if (conn->acl_recombination_pos == 0) { 612 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 613 return; 614 } 615 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 616 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 617 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 618 conn->acl_recombination_pos = 0; 619 return; 620 } 621 622 // append fragment payload (header already stored) 623 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 624 conn->acl_recombination_pos += acl_length; 625 626 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 627 // conn->acl_recombination_pos, conn->acl_recombination_length); 628 629 // forward complete L2CAP packet if complete. 630 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 631 632 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, &conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 633 // reset recombination buffer 634 conn->acl_recombination_length = 0; 635 conn->acl_recombination_pos = 0; 636 } 637 break; 638 639 case 0x02: { // first fragment 640 641 // sanity check 642 if (conn->acl_recombination_pos) { 643 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 644 conn->acl_recombination_pos = 0; 645 } 646 647 // peek into L2CAP packet! 648 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 649 650 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 651 652 // compare fragment size to L2CAP packet size 653 if (acl_length >= l2cap_length + 4){ 654 655 // forward fragment as L2CAP packet 656 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 657 658 } else { 659 660 if (acl_length > HCI_ACL_BUFFER_SIZE){ 661 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 662 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 663 return; 664 } 665 666 // store first fragment and tweak acl length for complete package 667 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 668 conn->acl_recombination_pos = acl_length + 4; 669 conn->acl_recombination_length = l2cap_length; 670 bt_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 671 } 672 break; 673 674 } 675 default: 676 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 677 return; 678 } 679 680 // execute main loop 681 hci_run(); 682 } 683 684 static void hci_shutdown_connection(hci_connection_t *conn){ 685 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 686 687 run_loop_remove_timer(&conn->timeout); 688 689 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 690 btstack_memory_hci_connection_free( conn ); 691 692 // now it's gone 693 hci_emit_nr_connections_changed(); 694 } 695 696 static const uint16_t packet_type_sizes[] = { 697 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 698 HCI_ACL_DH1_SIZE, 0, 0, 0, 699 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 700 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 701 }; 702 static const uint8_t packet_type_feature_requirement_bit[] = { 703 0, // 3 slot packets 704 1, // 5 slot packets 705 25, // EDR 2 mpbs 706 26, // EDR 3 mbps 707 39, // 3 slot EDR packts 708 40, // 5 slot EDR packet 709 }; 710 static const uint16_t packet_type_feature_packet_mask[] = { 711 0x0f00, // 3 slot packets 712 0xf000, // 5 slot packets 713 0x1102, // EDR 2 mpbs 714 0x2204, // EDR 3 mbps 715 0x0300, // 3 slot EDR packts 716 0x3000, // 5 slot EDR packet 717 }; 718 719 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 720 // enable packet types based on size 721 uint16_t packet_types = 0; 722 unsigned int i; 723 for (i=0;i<16;i++){ 724 if (packet_type_sizes[i] == 0) continue; 725 if (packet_type_sizes[i] <= buffer_size){ 726 packet_types |= 1 << i; 727 } 728 } 729 // disable packet types due to missing local supported features 730 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 731 int bit_idx = packet_type_feature_requirement_bit[i]; 732 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 733 if (feature_set) continue; 734 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 735 packet_types &= ~packet_type_feature_packet_mask[i]; 736 } 737 // flip bits for "may not be used" 738 packet_types ^= 0x3306; 739 return packet_types; 740 } 741 742 uint16_t hci_usable_acl_packet_types(void){ 743 return hci_stack->packet_types; 744 } 745 746 uint8_t* hci_get_outgoing_packet_buffer(void){ 747 // hci packet buffer is >= acl data packet length 748 return hci_stack->hci_packet_buffer; 749 } 750 751 uint16_t hci_max_acl_data_packet_length(void){ 752 return hci_stack->acl_data_packet_length; 753 } 754 755 int hci_non_flushable_packet_boundary_flag_supported(void){ 756 // No. 54, byte 6, bit 6 757 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 758 } 759 760 int hci_ssp_supported(void){ 761 // No. 51, byte 6, bit 3 762 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 763 } 764 765 int hci_classic_supported(void){ 766 // No. 37, byte 4, bit 5, = No BR/EDR Support 767 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 768 } 769 770 int hci_le_supported(void){ 771 #ifdef HAVE_BLE 772 // No. 37, byte 4, bit 6 = LE Supported (Controller) 773 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 774 #else 775 return 0; 776 #endif 777 } 778 779 // get addr type and address used in advertisement packets 780 void hci_le_advertisement_address(uint8_t * addr_type, bd_addr_t addr){ 781 *addr_type = hci_stack->adv_addr_type; 782 if (hci_stack->adv_addr_type){ 783 memcpy(addr, hci_stack->adv_address, 6); 784 } else { 785 memcpy(addr, hci_stack->local_bd_addr, 6); 786 } 787 } 788 789 #ifdef HAVE_BLE 790 void le_handle_advertisement_report(uint8_t *packet, int size){ 791 int offset = 3; 792 int num_reports = packet[offset]; 793 offset += 1; 794 795 int i; 796 log_info("HCI: handle adv report with num reports: %d", num_reports); 797 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 798 for (i=0; i<num_reports;i++){ 799 uint8_t data_length = packet[offset + 8]; 800 uint8_t event_size = 10 + data_length; 801 int pos = 0; 802 event[pos++] = GAP_LE_ADVERTISING_REPORT; 803 event[pos++] = event_size; 804 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 805 offset += 8; 806 pos += 8; 807 event[pos++] = packet[offset + 1 + data_length]; // rssi 808 event[pos++] = packet[offset++]; //data_length; 809 memcpy(&event[pos], &packet[offset], data_length); 810 pos += data_length; 811 offset += data_length + 1; // rssi 812 hci_dump_packet( HCI_EVENT_PACKET, 0, event, pos); 813 hci_stack->packet_handler(HCI_EVENT_PACKET, event, pos); 814 } 815 } 816 #endif 817 818 static void hci_initialization_timeout_handler(timer_source_t * ds){ 819 switch (hci_stack->substate){ 820 case HCI_INIT_W4_SEND_RESET: 821 log_info("Resend HCI Reset"); 822 hci_stack->substate = HCI_INIT_SEND_RESET; 823 hci_stack->num_cmd_packets = 1; 824 hci_run(); 825 break; 826 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 827 log_info("Resend HCI Reset - CSR Warm Boot"); 828 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 829 hci_stack->num_cmd_packets = 1; 830 hci_run(); 831 case HCI_INIT_W4_SEND_BAUD_CHANGE: 832 log_info("Local baud rate change to %u", ((hci_uart_config_t *)hci_stack->config)->baudrate_main); 833 hci_stack->hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack->config)->baudrate_main); 834 break; 835 default: 836 break; 837 } 838 } 839 840 static void hci_initializing_next_state(void){ 841 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 842 } 843 844 // assumption: hci_can_send_command_packet_now() == true 845 static void hci_initializing_run(void){ 846 log_info("hci_initializing_run: substate %u", hci_stack->substate); 847 switch (hci_stack->substate){ 848 case HCI_INIT_SEND_RESET: 849 hci_state_reset(); 850 851 #ifndef USE_BLUETOOL 852 // prepare reset if command complete not received in 100ms 853 run_loop_set_timer(&hci_stack->timeout, 100); 854 run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 855 run_loop_add_timer(&hci_stack->timeout); 856 #endif 857 // send command 858 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 859 hci_send_cmd(&hci_reset); 860 break; 861 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 862 hci_send_cmd(&hci_read_local_version_information); 863 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 864 break; 865 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 866 hci_state_reset(); 867 // prepare reset if command complete not received in 100ms 868 run_loop_set_timer(&hci_stack->timeout, 100); 869 run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 870 run_loop_add_timer(&hci_stack->timeout); 871 // send command 872 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 873 hci_send_cmd(&hci_reset); 874 break; 875 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 876 hci_state_reset(); 877 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 878 hci_send_cmd(&hci_reset); 879 break; 880 case HCI_INIT_SET_BD_ADDR: 881 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 882 hci_stack->control->set_bd_addr_cmd(hci_stack->config, hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 883 hci_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0); 884 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 885 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 886 break; 887 case HCI_INIT_SEND_BAUD_CHANGE: 888 hci_stack->control->baudrate_cmd(hci_stack->config, ((hci_uart_config_t *)hci_stack->config)->baudrate_main, hci_stack->hci_packet_buffer); 889 hci_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0); 890 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 891 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 892 // STLC25000D: baudrate change happens within 0.5 s after command was send, 893 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 894 if (hci_stack->manufacturer == 0x0030){ 895 run_loop_set_timer(&hci_stack->timeout, 100); 896 run_loop_add_timer(&hci_stack->timeout); 897 } 898 break; 899 case HCI_INIT_CUSTOM_INIT: 900 log_info("Custom init"); 901 // Custom initialization 902 if (hci_stack->control && hci_stack->control->next_cmd){ 903 int valid_cmd = (*hci_stack->control->next_cmd)(hci_stack->config, hci_stack->hci_packet_buffer); 904 if (valid_cmd){ 905 int size = 3 + hci_stack->hci_packet_buffer[2]; 906 hci_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0); 907 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 908 switch (valid_cmd) { 909 case 1: 910 default: 911 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 912 break; 913 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 914 log_info("CSR Warm Boot"); 915 run_loop_set_timer(&hci_stack->timeout, 100); 916 run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 917 run_loop_add_timer(&hci_stack->timeout); 918 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 919 break; 920 } 921 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 922 break; 923 } 924 log_info("hci_run: init script done"); 925 } 926 // otherwise continue 927 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 928 hci_send_cmd(&hci_read_bd_addr); 929 break; 930 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 931 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 932 hci_send_cmd(&hci_read_local_supported_commands); 933 break; 934 case HCI_INIT_READ_BUFFER_SIZE: 935 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 936 hci_send_cmd(&hci_read_buffer_size); 937 break; 938 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATUES: 939 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATUES; 940 hci_send_cmd(&hci_read_local_supported_features); 941 break; 942 case HCI_INIT_SET_EVENT_MASK: 943 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 944 if (hci_le_supported()){ 945 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 946 } else { 947 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 948 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 949 } 950 break; 951 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 952 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 953 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 954 break; 955 case HCI_INIT_WRITE_PAGE_TIMEOUT: 956 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 957 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 958 break; 959 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 960 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 961 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 962 break; 963 case HCI_INIT_WRITE_LOCAL_NAME: 964 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 965 if (hci_stack->local_name){ 966 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 967 } else { 968 char hostname[30]; 969 #ifdef EMBEDDED 970 // BTstack-11:22:33:44:55:66 971 strcpy(hostname, "BTstack "); 972 strcat(hostname, bd_addr_to_str(hci_stack->local_bd_addr)); 973 log_info("---> Name %s", hostname); 974 #else 975 // hostname for POSIX systems 976 gethostname(hostname, 30); 977 hostname[29] = '\0'; 978 #endif 979 hci_send_cmd(&hci_write_local_name, hostname); 980 } 981 break; 982 case HCI_INIT_WRITE_SCAN_ENABLE: 983 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 984 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 985 break; 986 #ifdef HAVE_BLE 987 // LE INIT 988 case HCI_INIT_LE_READ_BUFFER_SIZE: 989 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 990 hci_send_cmd(&hci_le_read_buffer_size); 991 break; 992 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 993 // LE Supported Host = 1, Simultaneous Host = 0 994 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 995 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 996 break; 997 case HCI_INIT_READ_WHITE_LIST_SIZE: 998 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 999 hci_send_cmd(&hci_le_read_white_list_size); 1000 break; 1001 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1002 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 1003 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1004 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 1005 break; 1006 #endif 1007 // DONE 1008 case HCI_INIT_DONE: 1009 // done. 1010 hci_stack->state = HCI_STATE_WORKING; 1011 hci_emit_state(); 1012 return; 1013 default: 1014 return; 1015 } 1016 } 1017 1018 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1019 uint8_t command_completed = 0; 1020 1021 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 1022 uint16_t opcode = READ_BT_16(packet,3); 1023 if (opcode == hci_stack->last_cmd_opcode){ 1024 command_completed = 1; 1025 log_info("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1026 } else { 1027 log_info("Command complete for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1028 } 1029 } 1030 if (packet[0] == HCI_EVENT_COMMAND_STATUS){ 1031 uint8_t status = packet[2]; 1032 uint16_t opcode = READ_BT_16(packet,4); 1033 if (opcode == hci_stack->last_cmd_opcode){ 1034 if (status){ 1035 command_completed = 1; 1036 log_error("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1037 } else { 1038 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1039 } 1040 } else { 1041 log_info("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1042 } 1043 } 1044 // Vendor == CSR 1045 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && packet[0] == HCI_EVENT_VENDOR_SPECIFIC){ 1046 // TODO: track actual command 1047 command_completed = 1; 1048 } 1049 1050 if (!command_completed) return; 1051 1052 int need_baud_change = hci_stack->config 1053 && hci_stack->control 1054 && hci_stack->control->baudrate_cmd 1055 && hci_stack->hci_transport->set_baudrate 1056 && ((hci_uart_config_t *)hci_stack->config)->baudrate_main; 1057 1058 int need_addr_change = hci_stack->custom_bd_addr_set 1059 && hci_stack->control 1060 && hci_stack->control->set_bd_addr_cmd; 1061 1062 switch(hci_stack->substate){ 1063 case HCI_INIT_W4_SEND_RESET: 1064 run_loop_remove_timer(&hci_stack->timeout); 1065 break; 1066 case HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION: 1067 if (need_addr_change){ 1068 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1069 return; 1070 } 1071 // skipping addr change 1072 if (need_baud_change){ 1073 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1074 return; 1075 } 1076 // also skip baud change 1077 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1078 return; 1079 case HCI_INIT_W4_SET_BD_ADDR: 1080 // for STLC2500D, bd addr change only gets active after sending reset command 1081 if (hci_stack->manufacturer == 0x0030){ 1082 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1083 return; 1084 } 1085 // skipping warm boot on STLC2500D 1086 if (need_baud_change){ 1087 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1088 return; 1089 } 1090 // skipping baud change 1091 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1092 return; 1093 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1094 if (need_baud_change){ 1095 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1096 return; 1097 } 1098 // skipping baud change 1099 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1100 return; 1101 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1102 // for STLC2500D, baud rate change already happened. 1103 // for CC256x, baud rate gets changed now 1104 if (hci_stack->manufacturer != 0x0030){ 1105 uint32_t new_baud = ((hci_uart_config_t *)hci_stack->config)->baudrate_main; 1106 log_info("Local baud rate change to %u", new_baud); 1107 hci_stack->hci_transport->set_baudrate(new_baud); 1108 } 1109 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1110 return; 1111 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1112 run_loop_remove_timer(&hci_stack->timeout); 1113 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1114 return; 1115 case HCI_INIT_W4_CUSTOM_INIT: 1116 // repeat custom init 1117 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1118 return; 1119 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1120 // skip read buffer size if not supported 1121 if (hci_stack->local_supported_commands[0] & 0x01) break; 1122 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATUES; 1123 return; 1124 case HCI_INIT_W4_SET_EVENT_MASK: 1125 // skip Classic init commands for LE only chipsets 1126 if (!hci_classic_supported()){ 1127 if (hci_le_supported()){ 1128 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1129 return; 1130 } else { 1131 log_error("Neither BR/EDR nor LE supported"); 1132 hci_stack->substate = HCI_INIT_DONE; // skip all 1133 return; 1134 } 1135 } 1136 if (!hci_ssp_supported()){ 1137 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1138 return; 1139 } 1140 break; 1141 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1142 // skip write le host if not supported (e.g. on LE only EM9301) 1143 if (hci_stack->local_supported_commands[0] & 0x02) break; 1144 hci_stack->substate = HCI_INIT_LE_SET_SCAN_PARAMETERS; 1145 return; 1146 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1147 if (!hci_le_supported()){ 1148 // SKIP LE init for Classic only configuration 1149 hci_stack->substate = HCI_INIT_DONE; 1150 return; 1151 } 1152 default: 1153 break; 1154 } 1155 hci_initializing_next_state(); 1156 } 1157 1158 1159 // avoid huge local variables 1160 #ifndef EMBEDDED 1161 static device_name_t device_name; 1162 #endif 1163 static void event_handler(uint8_t *packet, int size){ 1164 1165 uint16_t event_length = packet[1]; 1166 1167 // assert packet is complete 1168 if (size != event_length + 2){ 1169 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 1170 return; 1171 } 1172 1173 bd_addr_t addr; 1174 bd_addr_type_t addr_type; 1175 uint8_t link_type; 1176 hci_con_handle_t handle; 1177 hci_connection_t * conn; 1178 int i; 1179 1180 // log_info("HCI:EVENT:%02x", packet[0]); 1181 1182 switch (packet[0]) { 1183 1184 case HCI_EVENT_COMMAND_COMPLETE: 1185 // get num cmd packets 1186 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u", hci_stack->num_cmd_packets, packet[2]); 1187 hci_stack->num_cmd_packets = packet[2]; 1188 1189 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 1190 // from offset 5 1191 // status 1192 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1193 hci_stack->acl_data_packet_length = READ_BT_16(packet, 6); 1194 hci_stack->sco_data_packet_length = packet[8]; 1195 hci_stack->acl_packets_total_num = READ_BT_16(packet, 9); 1196 hci_stack->sco_packets_total_num = READ_BT_16(packet, 11); 1197 1198 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1199 // determine usable ACL payload size 1200 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1201 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1202 } 1203 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1204 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1205 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1206 } 1207 } 1208 #ifdef HAVE_BLE 1209 if (COMMAND_COMPLETE_EVENT(packet, hci_le_read_buffer_size)){ 1210 hci_stack->le_data_packets_length = READ_BT_16(packet, 6); 1211 hci_stack->le_acl_packets_total_num = packet[8]; 1212 // determine usable ACL payload size 1213 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1214 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1215 } 1216 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1217 } 1218 if (COMMAND_COMPLETE_EVENT(packet, hci_le_read_white_list_size)){ 1219 hci_stack->le_white_list_capacity = READ_BT_16(packet, 6); 1220 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_white_list_capacity); 1221 } 1222 #endif 1223 // Dump local address 1224 if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)) { 1225 bt_flip_addr(hci_stack->local_bd_addr, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1]); 1226 log_info("Local Address, Status: 0x%02x: Addr: %s", 1227 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1228 } 1229 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 1230 hci_emit_discoverable_enabled(hci_stack->discoverable); 1231 } 1232 // Note: HCI init checks 1233 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_features)){ 1234 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1235 1236 // determine usable ACL packet types based on host buffer size and supported features 1237 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1238 log_info("packet types %04x", hci_stack->packet_types); 1239 1240 // Classic/LE 1241 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1242 } 1243 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_version_information)){ 1244 // hci_stack->hci_version = READ_BT_16(packet, 4); 1245 // hci_stack->hci_revision = READ_BT_16(packet, 6); 1246 // hci_stack->lmp_version = READ_BT_16(packet, 8); 1247 hci_stack->manufacturer = READ_BT_16(packet, 10); 1248 // hci_stack->lmp_subversion = READ_BT_16(packet, 12); 1249 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1250 } 1251 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_commands)){ 1252 hci_stack->local_supported_commands[0] = 1253 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0X80) >> 7 | // Octet 14, bit 7 1254 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5; // Octet 24, bit 6 1255 } 1256 break; 1257 1258 case HCI_EVENT_COMMAND_STATUS: 1259 // get num cmd packets 1260 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u", hci_stack->num_cmd_packets, packet[3]); 1261 hci_stack->num_cmd_packets = packet[3]; 1262 break; 1263 1264 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1265 int offset = 3; 1266 for (i=0; i<packet[2];i++){ 1267 handle = READ_BT_16(packet, offset); 1268 offset += 2; 1269 uint16_t num_packets = READ_BT_16(packet, offset); 1270 offset += 2; 1271 1272 conn = hci_connection_for_handle(handle); 1273 if (!conn){ 1274 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1275 continue; 1276 } 1277 1278 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1279 if (conn->num_sco_packets_sent >= num_packets){ 1280 conn->num_sco_packets_sent -= num_packets; 1281 } else { 1282 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1283 conn->num_sco_packets_sent = 0; 1284 } 1285 1286 } else { 1287 if (conn->num_acl_packets_sent >= num_packets){ 1288 conn->num_acl_packets_sent -= num_packets; 1289 } else { 1290 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1291 conn->num_acl_packets_sent = 0; 1292 } 1293 } 1294 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1295 } 1296 break; 1297 } 1298 case HCI_EVENT_CONNECTION_REQUEST: 1299 bt_flip_addr(addr, &packet[2]); 1300 // TODO: eval COD 8-10 1301 link_type = packet[11]; 1302 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1303 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1304 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1305 if (!conn) { 1306 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1307 } 1308 if (!conn) { 1309 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1310 hci_stack->decline_reason = 0x0d; 1311 BD_ADDR_COPY(hci_stack->decline_addr, addr); 1312 break; 1313 } 1314 conn->state = RECEIVED_CONNECTION_REQUEST; 1315 hci_run(); 1316 break; 1317 1318 case HCI_EVENT_CONNECTION_COMPLETE: 1319 // Connection management 1320 bt_flip_addr(addr, &packet[5]); 1321 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1322 addr_type = BD_ADDR_TYPE_CLASSIC; 1323 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1324 if (conn) { 1325 if (!packet[2]){ 1326 conn->state = OPEN; 1327 conn->con_handle = READ_BT_16(packet, 3); 1328 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1329 1330 // restart timer 1331 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1332 run_loop_add_timer(&conn->timeout); 1333 1334 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1335 1336 hci_emit_nr_connections_changed(); 1337 } else { 1338 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1339 uint8_t status = packet[2]; 1340 bd_addr_t bd_address; 1341 memcpy(&bd_address, conn->address, 6); 1342 1343 // connection failed, remove entry 1344 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 1345 btstack_memory_hci_connection_free( conn ); 1346 1347 // notify client if dedicated bonding 1348 if (notify_dedicated_bonding_failed){ 1349 log_info("hci notify_dedicated_bonding_failed"); 1350 hci_emit_dedicated_bonding_result(bd_address, status); 1351 } 1352 1353 // if authentication error, also delete link key 1354 if (packet[2] == 0x05) { 1355 hci_drop_link_key_for_bd_addr(addr); 1356 } 1357 } 1358 } 1359 break; 1360 1361 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1362 bt_flip_addr(addr, &packet[5]); 1363 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1364 if (packet[2]){ 1365 // connection failed 1366 break; 1367 } 1368 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1369 if (!conn) { 1370 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1371 } 1372 if (!conn) { 1373 break; 1374 } 1375 conn->state = OPEN; 1376 conn->con_handle = READ_BT_16(packet, 3); 1377 break; 1378 1379 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1380 handle = READ_BT_16(packet, 3); 1381 conn = hci_connection_for_handle(handle); 1382 if (!conn) break; 1383 if (!packet[2]){ 1384 uint8_t * features = &packet[5]; 1385 if (features[6] & (1 << 3)){ 1386 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1387 } 1388 } 1389 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1390 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x", conn->bonding_flags); 1391 if (conn->bonding_flags & BONDING_DEDICATED){ 1392 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1393 } 1394 break; 1395 1396 case HCI_EVENT_LINK_KEY_REQUEST: 1397 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1398 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1399 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1400 if (hci_stack->bondable && !hci_stack->remote_device_db) break; 1401 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1402 hci_run(); 1403 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1404 return; 1405 1406 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1407 bt_flip_addr(addr, &packet[2]); 1408 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1409 if (!conn) break; 1410 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1411 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1412 // Change Connection Encryption keeps link key type 1413 if (link_key_type != CHANGED_COMBINATION_KEY){ 1414 conn->link_key_type = link_key_type; 1415 } 1416 if (!hci_stack->remote_device_db) break; 1417 hci_stack->remote_device_db->put_link_key(addr, &packet[8], conn->link_key_type); 1418 // still forward event to allow dismiss of pairing dialog 1419 break; 1420 } 1421 1422 case HCI_EVENT_PIN_CODE_REQUEST: 1423 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1424 // non-bondable mode: pin code negative reply will be sent 1425 if (!hci_stack->bondable){ 1426 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1427 hci_run(); 1428 return; 1429 } 1430 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1431 if (!hci_stack->remote_device_db) break; 1432 bt_flip_addr(addr, &packet[2]); 1433 hci_stack->remote_device_db->delete_link_key(addr); 1434 break; 1435 1436 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1437 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1438 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1439 break; 1440 1441 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1442 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1443 if (!hci_stack->ssp_auto_accept) break; 1444 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1445 break; 1446 1447 case HCI_EVENT_USER_PASSKEY_REQUEST: 1448 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1449 if (!hci_stack->ssp_auto_accept) break; 1450 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1451 break; 1452 1453 case HCI_EVENT_ENCRYPTION_CHANGE: 1454 handle = READ_BT_16(packet, 3); 1455 conn = hci_connection_for_handle(handle); 1456 if (!conn) break; 1457 if (packet[2] == 0) { 1458 if (packet[5]){ 1459 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1460 } else { 1461 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1462 } 1463 } 1464 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1465 break; 1466 1467 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1468 handle = READ_BT_16(packet, 3); 1469 conn = hci_connection_for_handle(handle); 1470 if (!conn) break; 1471 1472 // dedicated bonding: send result and disconnect 1473 if (conn->bonding_flags & BONDING_DEDICATED){ 1474 conn->bonding_flags &= ~BONDING_DEDICATED; 1475 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1476 conn->bonding_status = packet[2]; 1477 break; 1478 } 1479 1480 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1481 // link key sufficient for requested security 1482 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1483 break; 1484 } 1485 // not enough 1486 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1487 break; 1488 1489 #ifndef EMBEDDED 1490 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1491 if (!hci_stack->remote_device_db) break; 1492 if (packet[2]) break; // status not ok 1493 bt_flip_addr(addr, &packet[3]); 1494 // fix for invalid remote names - terminate on 0xff 1495 for (i=0; i<248;i++){ 1496 if (packet[9+i] == 0xff){ 1497 packet[9+i] = 0; 1498 break; 1499 } 1500 } 1501 memset(&device_name, 0, sizeof(device_name_t)); 1502 strncpy((char*) device_name, (char*) &packet[9], 248); 1503 hci_stack->remote_device_db->put_name(addr, &device_name); 1504 break; 1505 1506 case HCI_EVENT_INQUIRY_RESULT: 1507 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI:{ 1508 if (!hci_stack->remote_device_db) break; 1509 // first send inq result packet 1510 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 1511 // then send cached remote names 1512 int offset = 3; 1513 for (i=0; i<packet[2];i++){ 1514 bt_flip_addr(addr, &packet[offset]); 1515 offset += 14; // 6 + 1 + 1 + 1 + 3 + 2; 1516 if (hci_stack->remote_device_db->get_name(addr, &device_name)){ 1517 hci_emit_remote_name_cached(addr, &device_name); 1518 } 1519 } 1520 return; 1521 } 1522 #endif 1523 1524 // HCI_EVENT_DISCONNECTION_COMPLETE 1525 // has been split, to first notify stack before shutting connection down 1526 // see end of function, too. 1527 case HCI_EVENT_DISCONNECTION_COMPLETE: 1528 if (packet[2]) break; // status != 0 1529 handle = READ_BT_16(packet, 3); 1530 conn = hci_connection_for_handle(handle); 1531 if (!conn) break; // no conn struct anymore 1532 // re-enable advertisements for le connections if active 1533 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1534 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1535 } 1536 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1537 break; 1538 1539 case HCI_EVENT_HARDWARE_ERROR: 1540 if (hci_stack->hardware_error_callback){ 1541 (*hci_stack->hardware_error_callback)(); 1542 } else if(hci_stack->control && hci_stack->control->hw_error){ 1543 (*hci_stack->control->hw_error)(); 1544 } else { 1545 // if no special requests, just reboot stack 1546 hci_power_control_off(); 1547 hci_power_control_on(); 1548 } 1549 break; 1550 1551 case DAEMON_EVENT_HCI_PACKET_SENT: 1552 // release packet buffer only for asynchronous transport and if there are not further fragements 1553 if (hci_transport_synchronous()) { 1554 log_error("Synchronous HCI Transport shouldn't send DAEMON_EVENT_HCI_PACKET_SENT"); 1555 return; // instead of break: to avoid re-entering hci_run() 1556 } 1557 if (hci_stack->acl_fragmentation_total_size) break; 1558 hci_release_packet_buffer(); 1559 break; 1560 1561 #ifdef HAVE_BLE 1562 case HCI_EVENT_LE_META: 1563 switch (packet[2]){ 1564 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1565 log_info("advertising report received"); 1566 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1567 le_handle_advertisement_report(packet, size); 1568 break; 1569 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1570 // Connection management 1571 bt_flip_addr(addr, &packet[8]); 1572 addr_type = (bd_addr_type_t)packet[7]; 1573 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1574 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1575 // handle error first 1576 if (packet[3]){ 1577 if (conn){ 1578 // outgoing connection failed, remove entry 1579 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 1580 btstack_memory_hci_connection_free( conn ); 1581 } 1582 // if authentication error, also delete link key 1583 if (packet[3] == 0x05) { 1584 hci_drop_link_key_for_bd_addr(addr); 1585 } 1586 break; 1587 } 1588 if (!conn){ 1589 // advertisemts are stopped on incoming connection 1590 hci_stack->le_advertisements_active = 0; 1591 // LE connections are auto-accepted, so just create a connection if there isn't one already 1592 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1593 } 1594 if (!conn){ 1595 // no memory 1596 break; 1597 } 1598 1599 conn->state = OPEN; 1600 conn->con_handle = READ_BT_16(packet, 4); 1601 1602 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1603 1604 // restart timer 1605 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1606 // run_loop_add_timer(&conn->timeout); 1607 1608 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1609 1610 hci_emit_nr_connections_changed(); 1611 break; 1612 1613 // log_info("LE buffer size: %u, count %u", READ_BT_16(packet,6), packet[8]); 1614 1615 default: 1616 break; 1617 } 1618 break; 1619 #endif 1620 default: 1621 break; 1622 } 1623 1624 // handle BT initialization 1625 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1626 hci_initializing_event_handler(packet, size); 1627 } 1628 1629 // help with BT sleep 1630 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1631 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 1632 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 1633 hci_initializing_next_state(); 1634 } 1635 1636 // notify upper stack 1637 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 1638 1639 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 1640 if (packet[0] == HCI_EVENT_DISCONNECTION_COMPLETE){ 1641 if (!packet[2]){ 1642 handle = READ_BT_16(packet, 3); 1643 hci_connection_t * conn = hci_connection_for_handle(handle); 1644 if (conn) { 1645 uint8_t status = conn->bonding_status; 1646 uint16_t flags = conn->bonding_flags; 1647 bd_addr_t bd_address; 1648 memcpy(&bd_address, conn->address, 6); 1649 hci_shutdown_connection(conn); 1650 // connection struct is gone, don't access anymore 1651 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 1652 hci_emit_dedicated_bonding_result(bd_address, status); 1653 } 1654 } 1655 } 1656 } 1657 1658 // execute main loop 1659 hci_run(); 1660 } 1661 1662 static void sco_handler(uint8_t * packet, uint16_t size){ 1663 // not handled yet 1664 } 1665 1666 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1667 hci_dump_packet(packet_type, 1, packet, size); 1668 switch (packet_type) { 1669 case HCI_EVENT_PACKET: 1670 event_handler(packet, size); 1671 break; 1672 case HCI_ACL_DATA_PACKET: 1673 acl_handler(packet, size); 1674 break; 1675 case HCI_SCO_DATA_PACKET: 1676 sco_handler(packet, size); 1677 default: 1678 break; 1679 } 1680 } 1681 1682 /** Register HCI packet handlers */ 1683 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 1684 hci_stack->packet_handler = handler; 1685 } 1686 1687 static void hci_state_reset(void){ 1688 // no connections yet 1689 hci_stack->connections = NULL; 1690 1691 // keep discoverable/connectable as this has been requested by the client(s) 1692 // hci_stack->discoverable = 0; 1693 // hci_stack->connectable = 0; 1694 // hci_stack->bondable = 1; 1695 1696 // buffer is free 1697 hci_stack->hci_packet_buffer_reserved = 0; 1698 1699 // no pending cmds 1700 hci_stack->decline_reason = 0; 1701 hci_stack->new_scan_enable_value = 0xff; 1702 1703 // LE 1704 hci_stack->adv_addr_type = 0; 1705 memset(hci_stack->adv_address, 0, 6); 1706 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1707 hci_stack->le_scan_type = 0xff; 1708 hci_stack->le_connection_parameter_range.le_conn_interval_min = 0x0006; 1709 hci_stack->le_connection_parameter_range.le_conn_interval_max = 0x0C80; 1710 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0x0000; 1711 hci_stack->le_connection_parameter_range.le_conn_latency_max = 0x03E8; 1712 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 0x000A; 1713 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 0x0C80; 1714 } 1715 1716 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 1717 1718 #ifdef HAVE_MALLOC 1719 if (!hci_stack) { 1720 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 1721 } 1722 #else 1723 hci_stack = &hci_stack_static; 1724 #endif 1725 memset(hci_stack, 0, sizeof(hci_stack_t)); 1726 1727 // reference to use transport layer implementation 1728 hci_stack->hci_transport = transport; 1729 1730 // references to used control implementation 1731 hci_stack->control = control; 1732 1733 // reference to used config 1734 hci_stack->config = config; 1735 1736 // higher level handler 1737 hci_stack->packet_handler = dummy_handler; 1738 1739 // store and open remote device db 1740 hci_stack->remote_device_db = remote_device_db; 1741 if (hci_stack->remote_device_db) { 1742 hci_stack->remote_device_db->open(); 1743 } 1744 1745 // max acl payload size defined in config.h 1746 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1747 1748 // register packet handlers with transport 1749 transport->register_packet_handler(&packet_handler); 1750 1751 hci_stack->state = HCI_STATE_OFF; 1752 1753 // class of device 1754 hci_stack->class_of_device = 0x007a020c; // Smartphone 1755 1756 // bondable by default 1757 hci_stack->bondable = 1; 1758 1759 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 1760 hci_stack->ssp_enable = 1; 1761 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 1762 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 1763 hci_stack->ssp_auto_accept = 1; 1764 1765 hci_state_reset(); 1766 } 1767 1768 void hci_close(void){ 1769 // close remote device db 1770 if (hci_stack->remote_device_db) { 1771 hci_stack->remote_device_db->close(); 1772 } 1773 while (hci_stack->connections) { 1774 // cancel all l2cap connections 1775 hci_emit_disconnection_complete(((hci_connection_t *) hci_stack->connections)->con_handle, 0x16); // terminated by local host 1776 hci_shutdown_connection((hci_connection_t *) hci_stack->connections); 1777 } 1778 hci_power_control(HCI_POWER_OFF); 1779 1780 #ifdef HAVE_MALLOC 1781 free(hci_stack); 1782 #endif 1783 hci_stack = NULL; 1784 } 1785 1786 void hci_set_class_of_device(uint32_t class_of_device){ 1787 hci_stack->class_of_device = class_of_device; 1788 } 1789 1790 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 1791 void hci_set_bd_addr(bd_addr_t addr){ 1792 memcpy(hci_stack->custom_bd_addr, addr, 6); 1793 hci_stack->custom_bd_addr_set = 1; 1794 } 1795 1796 void hci_disable_l2cap_timeout_check(void){ 1797 disable_l2cap_timeouts = 1; 1798 } 1799 // State-Module-Driver overview 1800 // state module low-level 1801 // HCI_STATE_OFF off close 1802 // HCI_STATE_INITIALIZING, on open 1803 // HCI_STATE_WORKING, on open 1804 // HCI_STATE_HALTING, on open 1805 // HCI_STATE_SLEEPING, off/sleep close 1806 // HCI_STATE_FALLING_ASLEEP on open 1807 1808 static int hci_power_control_on(void){ 1809 1810 // power on 1811 int err = 0; 1812 if (hci_stack->control && hci_stack->control->on){ 1813 err = (*hci_stack->control->on)(hci_stack->config); 1814 } 1815 if (err){ 1816 log_error( "POWER_ON failed"); 1817 hci_emit_hci_open_failed(); 1818 return err; 1819 } 1820 1821 // open low-level device 1822 err = hci_stack->hci_transport->open(hci_stack->config); 1823 if (err){ 1824 log_error( "HCI_INIT failed, turning Bluetooth off again"); 1825 if (hci_stack->control && hci_stack->control->off){ 1826 (*hci_stack->control->off)(hci_stack->config); 1827 } 1828 hci_emit_hci_open_failed(); 1829 return err; 1830 } 1831 return 0; 1832 } 1833 1834 static void hci_power_control_off(void){ 1835 1836 log_info("hci_power_control_off"); 1837 1838 // close low-level device 1839 hci_stack->hci_transport->close(hci_stack->config); 1840 1841 log_info("hci_power_control_off - hci_transport closed"); 1842 1843 // power off 1844 if (hci_stack->control && hci_stack->control->off){ 1845 (*hci_stack->control->off)(hci_stack->config); 1846 } 1847 1848 log_info("hci_power_control_off - control closed"); 1849 1850 hci_stack->state = HCI_STATE_OFF; 1851 } 1852 1853 static void hci_power_control_sleep(void){ 1854 1855 log_info("hci_power_control_sleep"); 1856 1857 #if 0 1858 // don't close serial port during sleep 1859 1860 // close low-level device 1861 hci_stack->hci_transport->close(hci_stack->config); 1862 #endif 1863 1864 // sleep mode 1865 if (hci_stack->control && hci_stack->control->sleep){ 1866 (*hci_stack->control->sleep)(hci_stack->config); 1867 } 1868 1869 hci_stack->state = HCI_STATE_SLEEPING; 1870 } 1871 1872 static int hci_power_control_wake(void){ 1873 1874 log_info("hci_power_control_wake"); 1875 1876 // wake on 1877 if (hci_stack->control && hci_stack->control->wake){ 1878 (*hci_stack->control->wake)(hci_stack->config); 1879 } 1880 1881 #if 0 1882 // open low-level device 1883 int err = hci_stack->hci_transport->open(hci_stack->config); 1884 if (err){ 1885 log_error( "HCI_INIT failed, turning Bluetooth off again"); 1886 if (hci_stack->control && hci_stack->control->off){ 1887 (*hci_stack->control->off)(hci_stack->config); 1888 } 1889 hci_emit_hci_open_failed(); 1890 return err; 1891 } 1892 #endif 1893 1894 return 0; 1895 } 1896 1897 static void hci_power_transition_to_initializing(void){ 1898 // set up state machine 1899 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 1900 hci_stack->hci_packet_buffer_reserved = 0; 1901 hci_stack->state = HCI_STATE_INITIALIZING; 1902 hci_stack->substate = HCI_INIT_SEND_RESET; 1903 } 1904 1905 int hci_power_control(HCI_POWER_MODE power_mode){ 1906 1907 log_info("hci_power_control: %u, current mode %u", power_mode, hci_stack->state); 1908 1909 int err = 0; 1910 switch (hci_stack->state){ 1911 1912 case HCI_STATE_OFF: 1913 switch (power_mode){ 1914 case HCI_POWER_ON: 1915 err = hci_power_control_on(); 1916 if (err) { 1917 log_error("hci_power_control_on() error %u", err); 1918 return err; 1919 } 1920 hci_power_transition_to_initializing(); 1921 break; 1922 case HCI_POWER_OFF: 1923 // do nothing 1924 break; 1925 case HCI_POWER_SLEEP: 1926 // do nothing (with SLEEP == OFF) 1927 break; 1928 } 1929 break; 1930 1931 case HCI_STATE_INITIALIZING: 1932 switch (power_mode){ 1933 case HCI_POWER_ON: 1934 // do nothing 1935 break; 1936 case HCI_POWER_OFF: 1937 // no connections yet, just turn it off 1938 hci_power_control_off(); 1939 break; 1940 case HCI_POWER_SLEEP: 1941 // no connections yet, just turn it off 1942 hci_power_control_sleep(); 1943 break; 1944 } 1945 break; 1946 1947 case HCI_STATE_WORKING: 1948 switch (power_mode){ 1949 case HCI_POWER_ON: 1950 // do nothing 1951 break; 1952 case HCI_POWER_OFF: 1953 // see hci_run 1954 hci_stack->state = HCI_STATE_HALTING; 1955 break; 1956 case HCI_POWER_SLEEP: 1957 // see hci_run 1958 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 1959 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 1960 break; 1961 } 1962 break; 1963 1964 case HCI_STATE_HALTING: 1965 switch (power_mode){ 1966 case HCI_POWER_ON: 1967 hci_power_transition_to_initializing(); 1968 break; 1969 case HCI_POWER_OFF: 1970 // do nothing 1971 break; 1972 case HCI_POWER_SLEEP: 1973 // see hci_run 1974 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 1975 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 1976 break; 1977 } 1978 break; 1979 1980 case HCI_STATE_FALLING_ASLEEP: 1981 switch (power_mode){ 1982 case HCI_POWER_ON: 1983 1984 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1985 // nothing to do, if H4 supports power management 1986 if (bt_control_iphone_power_management_enabled()){ 1987 hci_stack->state = HCI_STATE_INITIALIZING; 1988 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 1989 break; 1990 } 1991 #endif 1992 hci_power_transition_to_initializing(); 1993 break; 1994 case HCI_POWER_OFF: 1995 // see hci_run 1996 hci_stack->state = HCI_STATE_HALTING; 1997 break; 1998 case HCI_POWER_SLEEP: 1999 // do nothing 2000 break; 2001 } 2002 break; 2003 2004 case HCI_STATE_SLEEPING: 2005 switch (power_mode){ 2006 case HCI_POWER_ON: 2007 2008 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 2009 // nothing to do, if H4 supports power management 2010 if (bt_control_iphone_power_management_enabled()){ 2011 hci_stack->state = HCI_STATE_INITIALIZING; 2012 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2013 hci_update_scan_enable(); 2014 break; 2015 } 2016 #endif 2017 err = hci_power_control_wake(); 2018 if (err) return err; 2019 hci_power_transition_to_initializing(); 2020 break; 2021 case HCI_POWER_OFF: 2022 hci_stack->state = HCI_STATE_HALTING; 2023 break; 2024 case HCI_POWER_SLEEP: 2025 // do nothing 2026 break; 2027 } 2028 break; 2029 } 2030 2031 // create internal event 2032 hci_emit_state(); 2033 2034 // trigger next/first action 2035 hci_run(); 2036 2037 return 0; 2038 } 2039 2040 static void hci_update_scan_enable(void){ 2041 // 2 = page scan, 1 = inq scan 2042 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2043 hci_run(); 2044 } 2045 2046 void hci_discoverable_control(uint8_t enable){ 2047 if (enable) enable = 1; // normalize argument 2048 2049 if (hci_stack->discoverable == enable){ 2050 hci_emit_discoverable_enabled(hci_stack->discoverable); 2051 return; 2052 } 2053 2054 hci_stack->discoverable = enable; 2055 hci_update_scan_enable(); 2056 } 2057 2058 void hci_connectable_control(uint8_t enable){ 2059 if (enable) enable = 1; // normalize argument 2060 2061 // don't emit event 2062 if (hci_stack->connectable == enable) return; 2063 2064 hci_stack->connectable = enable; 2065 hci_update_scan_enable(); 2066 } 2067 2068 void hci_local_bd_addr(bd_addr_t address_buffer){ 2069 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2070 } 2071 2072 void hci_run(void){ 2073 2074 // log_info("hci_run: entered"); 2075 hci_connection_t * connection; 2076 linked_item_t * it; 2077 2078 // send continuation fragments first, as they block the prepared packet buffer 2079 if (hci_stack->acl_fragmentation_total_size > 0) { 2080 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2081 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2082 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2083 if (connection) { 2084 hci_send_acl_packet_fragments(connection); 2085 return; 2086 } 2087 // connection gone -> discard further fragments 2088 hci_stack->acl_fragmentation_total_size = 0; 2089 hci_stack->acl_fragmentation_pos = 0; 2090 } 2091 } 2092 2093 if (!hci_can_send_command_packet_now()) return; 2094 2095 // global/non-connection oriented commands 2096 2097 // decline incoming connections 2098 if (hci_stack->decline_reason){ 2099 uint8_t reason = hci_stack->decline_reason; 2100 hci_stack->decline_reason = 0; 2101 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2102 return; 2103 } 2104 2105 // send scan enable 2106 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2107 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2108 hci_stack->new_scan_enable_value = 0xff; 2109 return; 2110 } 2111 2112 #ifdef HAVE_BLE 2113 if (hci_stack->state == HCI_STATE_WORKING){ 2114 // handle le scan 2115 switch(hci_stack->le_scanning_state){ 2116 case LE_START_SCAN: 2117 hci_stack->le_scanning_state = LE_SCANNING; 2118 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2119 return; 2120 2121 case LE_STOP_SCAN: 2122 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2123 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2124 return; 2125 default: 2126 break; 2127 } 2128 if (hci_stack->le_scan_type != 0xff){ 2129 // defaults: active scanning, accept all advertisement packets 2130 int scan_type = hci_stack->le_scan_type; 2131 hci_stack->le_scan_type = 0xff; 2132 hci_send_cmd(&hci_le_set_scan_parameters, scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->adv_addr_type, 0); 2133 return; 2134 } 2135 // le advertisement control 2136 if (hci_stack->le_advertisements_todo){ 2137 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2138 } 2139 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2140 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2141 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2142 return; 2143 } 2144 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2145 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2146 hci_send_cmd(&hci_le_set_advertising_parameters, 2147 hci_stack->le_advertisements_interval_min, 2148 hci_stack->le_advertisements_interval_max, 2149 hci_stack->le_advertisements_type, 2150 hci_stack->le_advertisements_own_address_type, 2151 hci_stack->le_advertisements_direct_address_type, 2152 hci_stack->le_advertisements_direct_address, 2153 hci_stack->le_advertisements_channel_map, 2154 hci_stack->le_advertisements_filter_policy); 2155 return; 2156 } 2157 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_DATA){ 2158 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_DATA; 2159 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, 2160 hci_stack->le_advertisements_data); 2161 return; 2162 } 2163 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2164 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2165 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2166 return; 2167 } 2168 } 2169 #endif 2170 2171 // send pending HCI commands 2172 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 2173 connection = (hci_connection_t *) it; 2174 2175 switch(connection->state){ 2176 case SEND_CREATE_CONNECTION: 2177 switch(connection->address_type){ 2178 case BD_ADDR_TYPE_CLASSIC: 2179 log_info("sending hci_create_connection"); 2180 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2181 break; 2182 default: 2183 #ifdef HAVE_BLE 2184 log_info("sending hci_le_create_connection"); 2185 hci_send_cmd(&hci_le_create_connection, 2186 0x0060, // scan interval: 60 ms 2187 0x0030, // scan interval: 30 ms 2188 0, // don't use whitelist 2189 connection->address_type, // peer address type 2190 connection->address, // peer bd addr 2191 hci_stack->adv_addr_type, // our addr type: 2192 0x0008, // conn interval min 2193 0x0018, // conn interval max 2194 0, // conn latency 2195 0x0048, // supervision timeout 2196 0x0001, // min ce length 2197 0x0001 // max ce length 2198 ); 2199 2200 connection->state = SENT_CREATE_CONNECTION; 2201 #endif 2202 break; 2203 } 2204 return; 2205 2206 case RECEIVED_CONNECTION_REQUEST: 2207 log_info("sending hci_accept_connection_request"); 2208 connection->state = ACCEPTED_CONNECTION_REQUEST; 2209 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2210 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2211 } else { 2212 // TODO: allows to customize synchronous connection parameters 2213 hci_send_cmd(&hci_accept_synchronous_connection, connection->address, 8000, 8000, 0xFFFF, 0x0060, 0xFF, 0x003F); 2214 } 2215 return; 2216 2217 #ifdef HAVE_BLE 2218 case SEND_CANCEL_CONNECTION: 2219 connection->state = SENT_CANCEL_CONNECTION; 2220 hci_send_cmd(&hci_le_create_connection_cancel); 2221 return; 2222 #endif 2223 case SEND_DISCONNECT: 2224 connection->state = SENT_DISCONNECT; 2225 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2226 return; 2227 2228 default: 2229 break; 2230 } 2231 2232 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2233 log_info("responding to link key request"); 2234 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2235 link_key_t link_key; 2236 link_key_type_t link_key_type; 2237 if ( hci_stack->remote_device_db 2238 && hci_stack->remote_device_db->get_link_key(connection->address, link_key, &link_key_type) 2239 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2240 connection->link_key_type = link_key_type; 2241 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2242 } else { 2243 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2244 } 2245 return; 2246 } 2247 2248 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2249 log_info("denying to pin request"); 2250 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2251 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2252 return; 2253 } 2254 2255 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2256 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2257 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2258 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2259 // tweak authentication requirements 2260 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2261 if (connection->bonding_flags & BONDING_DEDICATED){ 2262 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2263 } 2264 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2265 authreq |= 1; 2266 } 2267 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2268 } else { 2269 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2270 } 2271 return; 2272 } 2273 2274 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2275 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2276 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2277 return; 2278 } 2279 2280 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2281 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2282 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2283 return; 2284 } 2285 2286 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2287 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2288 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2289 return; 2290 } 2291 2292 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2293 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2294 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2295 return; 2296 } 2297 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2298 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2299 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2300 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2301 return; 2302 } 2303 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2304 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2305 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2306 return; 2307 } 2308 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2309 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2310 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2311 return; 2312 } 2313 2314 #ifdef HAVE_BLE 2315 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2316 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2317 2318 uint16_t connection_interval_min = connection->le_conn_interval_min; 2319 connection->le_conn_interval_min = 0; 2320 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2321 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2322 0x0000, 0xffff); 2323 } 2324 #endif 2325 } 2326 2327 switch (hci_stack->state){ 2328 case HCI_STATE_INITIALIZING: 2329 hci_initializing_run(); 2330 break; 2331 2332 case HCI_STATE_HALTING: 2333 2334 log_info("HCI_STATE_HALTING"); 2335 // close all open connections 2336 connection = (hci_connection_t *) hci_stack->connections; 2337 if (connection){ 2338 uint16_t con_handle = (uint16_t) connection->con_handle; 2339 if (!hci_can_send_command_packet_now()) return; 2340 2341 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2342 2343 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2344 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2345 2346 // ... which would be ignored anyway as we shutdown (free) the connection now 2347 hci_shutdown_connection(connection); 2348 2349 // finally, send the disconnect command 2350 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2351 return; 2352 } 2353 log_info("HCI_STATE_HALTING, calling off"); 2354 2355 // switch mode 2356 hci_power_control_off(); 2357 2358 log_info("HCI_STATE_HALTING, emitting state"); 2359 hci_emit_state(); 2360 log_info("HCI_STATE_HALTING, done"); 2361 break; 2362 2363 case HCI_STATE_FALLING_ASLEEP: 2364 switch(hci_stack->substate) { 2365 case HCI_FALLING_ASLEEP_DISCONNECT: 2366 log_info("HCI_STATE_FALLING_ASLEEP"); 2367 // close all open connections 2368 connection = (hci_connection_t *) hci_stack->connections; 2369 2370 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 2371 // don't close connections, if H4 supports power management 2372 if (bt_control_iphone_power_management_enabled()){ 2373 connection = NULL; 2374 } 2375 #endif 2376 if (connection){ 2377 2378 // send disconnect 2379 if (!hci_can_send_command_packet_now()) return; 2380 2381 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2382 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2383 2384 // send disconnected event right away - causes higher layer connections to get closed, too. 2385 hci_shutdown_connection(connection); 2386 return; 2387 } 2388 2389 if (hci_classic_supported()){ 2390 // disable page and inquiry scan 2391 if (!hci_can_send_command_packet_now()) return; 2392 2393 log_info("HCI_STATE_HALTING, disabling inq scans"); 2394 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 2395 2396 // continue in next sub state 2397 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 2398 break; 2399 } 2400 // fall through for ble-only chips 2401 2402 case HCI_FALLING_ASLEEP_COMPLETE: 2403 log_info("HCI_STATE_HALTING, calling sleep"); 2404 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 2405 // don't actually go to sleep, if H4 supports power management 2406 if (bt_control_iphone_power_management_enabled()){ 2407 // SLEEP MODE reached 2408 hci_stack->state = HCI_STATE_SLEEPING; 2409 hci_emit_state(); 2410 break; 2411 } 2412 #endif 2413 // switch mode 2414 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 2415 hci_emit_state(); 2416 break; 2417 2418 default: 2419 break; 2420 } 2421 break; 2422 2423 default: 2424 break; 2425 } 2426 } 2427 2428 int hci_send_cmd_packet(uint8_t *packet, int size){ 2429 bd_addr_t addr; 2430 hci_connection_t * conn; 2431 // house-keeping 2432 2433 // create_connection? 2434 if (IS_COMMAND(packet, hci_create_connection)){ 2435 bt_flip_addr(addr, &packet[3]); 2436 log_info("Create_connection to %s", bd_addr_to_str(addr)); 2437 2438 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2439 if (!conn){ 2440 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2441 if (!conn){ 2442 // notify client that alloc failed 2443 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 2444 return 0; // don't sent packet to controller 2445 } 2446 conn->state = SEND_CREATE_CONNECTION; 2447 } 2448 log_info("conn state %u", conn->state); 2449 switch (conn->state){ 2450 // if connection active exists 2451 case OPEN: 2452 // and OPEN, emit connection complete command, don't send to controller 2453 hci_emit_connection_complete(conn, 0); 2454 return 0; 2455 case SEND_CREATE_CONNECTION: 2456 // connection created by hci, e.g. dedicated bonding 2457 break; 2458 default: 2459 // otherwise, just ignore as it is already in the open process 2460 return 0; 2461 } 2462 conn->state = SENT_CREATE_CONNECTION; 2463 } 2464 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 2465 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 2466 } 2467 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 2468 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 2469 } 2470 2471 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 2472 if (hci_stack->remote_device_db){ 2473 bt_flip_addr(addr, &packet[3]); 2474 hci_stack->remote_device_db->delete_link_key(addr); 2475 } 2476 } 2477 2478 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 2479 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 2480 bt_flip_addr(addr, &packet[3]); 2481 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2482 if (conn){ 2483 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 2484 } 2485 } 2486 2487 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 2488 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 2489 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 2490 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 2491 bt_flip_addr(addr, &packet[3]); 2492 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2493 if (conn){ 2494 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 2495 } 2496 } 2497 2498 #ifdef HAVE_BLE 2499 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 2500 hci_stack->adv_addr_type = packet[8]; 2501 } 2502 if (IS_COMMAND(packet, hci_le_set_random_address)){ 2503 bt_flip_addr(hci_stack->adv_address, &packet[3]); 2504 } 2505 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 2506 hci_stack->le_advertisements_active = packet[3]; 2507 } 2508 #endif 2509 2510 hci_stack->num_cmd_packets--; 2511 2512 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2513 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2514 2515 // release packet buffer for synchronous transport implementations 2516 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 2517 hci_stack->hci_packet_buffer_reserved = 0; 2518 } 2519 2520 return err; 2521 } 2522 2523 // disconnect because of security block 2524 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 2525 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2526 if (!connection) return; 2527 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2528 } 2529 2530 2531 // Configure Secure Simple Pairing 2532 2533 // enable will enable SSP during init 2534 void hci_ssp_set_enable(int enable){ 2535 hci_stack->ssp_enable = enable; 2536 } 2537 2538 int hci_local_ssp_activated(void){ 2539 return hci_ssp_supported() && hci_stack->ssp_enable; 2540 } 2541 2542 // if set, BTstack will respond to io capability request using authentication requirement 2543 void hci_ssp_set_io_capability(int io_capability){ 2544 hci_stack->ssp_io_capability = io_capability; 2545 } 2546 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 2547 hci_stack->ssp_authentication_requirement = authentication_requirement; 2548 } 2549 2550 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 2551 void hci_ssp_set_auto_accept(int auto_accept){ 2552 hci_stack->ssp_auto_accept = auto_accept; 2553 } 2554 2555 /** 2556 * pre: numcmds >= 0 - it's allowed to send a command to the controller 2557 */ 2558 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 2559 2560 if (!hci_can_send_command_packet_now()){ 2561 log_error("hci_send_cmd called but cannot send packet now"); 2562 return 0; 2563 } 2564 2565 // for HCI INITIALIZATION 2566 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 2567 hci_stack->last_cmd_opcode = cmd->opcode; 2568 2569 hci_reserve_packet_buffer(); 2570 uint8_t * packet = hci_stack->hci_packet_buffer; 2571 2572 va_list argptr; 2573 va_start(argptr, cmd); 2574 uint16_t size = hci_create_cmd_internal(packet, cmd, argptr); 2575 va_end(argptr); 2576 2577 return hci_send_cmd_packet(packet, size); 2578 } 2579 2580 // Create various non-HCI events. 2581 // TODO: generalize, use table similar to hci_create_command 2582 2583 void hci_emit_state(void){ 2584 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 2585 uint8_t event[3]; 2586 event[0] = BTSTACK_EVENT_STATE; 2587 event[1] = sizeof(event) - 2; 2588 event[2] = hci_stack->state; 2589 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2590 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2591 } 2592 2593 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 2594 uint8_t event[13]; 2595 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 2596 event[1] = sizeof(event) - 2; 2597 event[2] = status; 2598 bt_store_16(event, 3, conn->con_handle); 2599 bt_flip_addr(&event[5], conn->address); 2600 event[11] = 1; // ACL connection 2601 event[12] = 0; // encryption disabled 2602 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2603 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2604 } 2605 2606 void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, uint16_t conn_handle, uint8_t status){ 2607 uint8_t event[21]; 2608 event[0] = HCI_EVENT_LE_META; 2609 event[1] = sizeof(event) - 2; 2610 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 2611 event[3] = status; 2612 bt_store_16(event, 4, conn_handle); 2613 event[6] = 0; // TODO: role 2614 event[7] = address_type; 2615 bt_flip_addr(&event[8], address); 2616 bt_store_16(event, 14, 0); // interval 2617 bt_store_16(event, 16, 0); // latency 2618 bt_store_16(event, 18, 0); // supervision timeout 2619 event[20] = 0; // master clock accuracy 2620 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2621 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2622 } 2623 2624 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 2625 uint8_t event[6]; 2626 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 2627 event[1] = sizeof(event) - 2; 2628 event[2] = 0; // status = OK 2629 bt_store_16(event, 3, handle); 2630 event[5] = reason; 2631 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2632 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2633 } 2634 2635 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 2636 if (disable_l2cap_timeouts) return; 2637 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 2638 uint8_t event[4]; 2639 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 2640 event[1] = sizeof(event) - 2; 2641 bt_store_16(event, 2, conn->con_handle); 2642 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2643 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2644 } 2645 2646 void hci_emit_nr_connections_changed(void){ 2647 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 2648 uint8_t event[3]; 2649 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 2650 event[1] = sizeof(event) - 2; 2651 event[2] = nr_hci_connections(); 2652 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2653 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2654 } 2655 2656 void hci_emit_hci_open_failed(void){ 2657 log_info("BTSTACK_EVENT_POWERON_FAILED"); 2658 uint8_t event[2]; 2659 event[0] = BTSTACK_EVENT_POWERON_FAILED; 2660 event[1] = sizeof(event) - 2; 2661 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2662 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2663 } 2664 2665 #ifndef EMBEDDED 2666 void hci_emit_btstack_version(void){ 2667 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 2668 uint8_t event[6]; 2669 event[0] = BTSTACK_EVENT_VERSION; 2670 event[1] = sizeof(event) - 2; 2671 event[2] = BTSTACK_MAJOR; 2672 event[3] = BTSTACK_MINOR; 2673 bt_store_16(event, 4, 3257); // last SVN commit on Google Code + 1 2674 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2675 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2676 } 2677 #endif 2678 2679 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 2680 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 2681 uint8_t event[3]; 2682 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 2683 event[1] = sizeof(event) - 2; 2684 event[2] = enabled; 2685 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2686 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2687 } 2688 2689 void hci_emit_remote_name_cached(bd_addr_t addr, device_name_t *name){ 2690 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 2691 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 2692 event[1] = sizeof(event) - 2 - 1; 2693 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 2694 bt_flip_addr(&event[3], addr); 2695 memcpy(&event[9], name, 248); 2696 2697 event[9+248] = 0; // assert \0 for log_info 2698 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(addr), &event[9]); 2699 2700 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 2701 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 2702 } 2703 2704 void hci_emit_discoverable_enabled(uint8_t enabled){ 2705 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 2706 uint8_t event[3]; 2707 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 2708 event[1] = sizeof(event) - 2; 2709 event[2] = enabled; 2710 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2711 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2712 } 2713 2714 void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 2715 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 2716 uint8_t event[5]; 2717 int pos = 0; 2718 event[pos++] = GAP_SECURITY_LEVEL; 2719 event[pos++] = sizeof(event) - 2; 2720 bt_store_16(event, 2, con_handle); 2721 pos += 2; 2722 event[pos++] = level; 2723 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2724 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2725 } 2726 2727 void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 2728 log_info("hci_emit_dedicated_bonding_result %u ", status); 2729 uint8_t event[9]; 2730 int pos = 0; 2731 event[pos++] = GAP_DEDICATED_BONDING_COMPLETED; 2732 event[pos++] = sizeof(event) - 2; 2733 event[pos++] = status; 2734 bt_flip_addr( &event[pos], address); 2735 pos += 6; 2736 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2737 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2738 } 2739 2740 // query if remote side supports SSP 2741 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 2742 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2743 if (!connection) return 0; 2744 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 2745 } 2746 2747 int hci_ssp_supported_on_both_sides(hci_con_handle_t handle){ 2748 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 2749 } 2750 2751 // GAP API 2752 /** 2753 * @bbrief enable/disable bonding. default is enabled 2754 * @praram enabled 2755 */ 2756 void gap_set_bondable_mode(int enable){ 2757 hci_stack->bondable = enable ? 1 : 0; 2758 } 2759 2760 /** 2761 * @brief map link keys to security levels 2762 */ 2763 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 2764 switch (link_key_type){ 2765 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 2766 return LEVEL_4; 2767 case COMBINATION_KEY: 2768 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 2769 return LEVEL_3; 2770 default: 2771 return LEVEL_2; 2772 } 2773 } 2774 2775 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 2776 if (!connection) return LEVEL_0; 2777 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 2778 return gap_security_level_for_link_key_type(connection->link_key_type); 2779 } 2780 2781 2782 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 2783 log_info("gap_mitm_protection_required_for_security_level %u", level); 2784 return level > LEVEL_2; 2785 } 2786 2787 /** 2788 * @brief get current security level 2789 */ 2790 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 2791 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2792 if (!connection) return LEVEL_0; 2793 return gap_security_level_for_connection(connection); 2794 } 2795 2796 /** 2797 * @brief request connection to device to 2798 * @result GAP_AUTHENTICATION_RESULT 2799 */ 2800 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 2801 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2802 if (!connection){ 2803 hci_emit_security_level(con_handle, LEVEL_0); 2804 return; 2805 } 2806 gap_security_level_t current_level = gap_security_level(con_handle); 2807 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 2808 if (current_level >= requested_level){ 2809 hci_emit_security_level(con_handle, current_level); 2810 return; 2811 } 2812 2813 connection->requested_security_level = requested_level; 2814 2815 #if 0 2816 // sending encryption request without a link key results in an error. 2817 // TODO: figure out how to use it properly 2818 2819 // would enabling ecnryption suffice (>= LEVEL_2)? 2820 if (hci_stack->remote_device_db){ 2821 link_key_type_t link_key_type; 2822 link_key_t link_key; 2823 if (hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 2824 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 2825 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2826 return; 2827 } 2828 } 2829 } 2830 #endif 2831 2832 // try to authenticate connection 2833 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2834 hci_run(); 2835 } 2836 2837 /** 2838 * @brief start dedicated bonding with device. disconnect after bonding 2839 * @param device 2840 * @param request MITM protection 2841 * @result GAP_DEDICATED_BONDING_COMPLETE 2842 */ 2843 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 2844 2845 // create connection state machine 2846 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 2847 2848 if (!connection){ 2849 return BTSTACK_MEMORY_ALLOC_FAILED; 2850 } 2851 2852 // delete linkn key 2853 hci_drop_link_key_for_bd_addr(device); 2854 2855 // configure LEVEL_2/3, dedicated bonding 2856 connection->state = SEND_CREATE_CONNECTION; 2857 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 2858 log_info("gap_dedicated_bonding, mitm %u -> level %u", mitm_protection_required, connection->requested_security_level); 2859 connection->bonding_flags = BONDING_DEDICATED; 2860 2861 // wait for GAP Security Result and send GAP Dedicated Bonding complete 2862 2863 // handle: connnection failure (connection complete != ok) 2864 // handle: authentication failure 2865 // handle: disconnect on done 2866 2867 hci_run(); 2868 2869 return 0; 2870 } 2871 2872 void gap_set_local_name(const char * local_name){ 2873 hci_stack->local_name = local_name; 2874 } 2875 2876 le_command_status_t le_central_start_scan(void){ 2877 if (hci_stack->le_scanning_state == LE_SCANNING) return BLE_PERIPHERAL_OK; 2878 hci_stack->le_scanning_state = LE_START_SCAN; 2879 hci_run(); 2880 return BLE_PERIPHERAL_OK; 2881 } 2882 2883 le_command_status_t le_central_stop_scan(void){ 2884 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return BLE_PERIPHERAL_OK; 2885 hci_stack->le_scanning_state = LE_STOP_SCAN; 2886 hci_run(); 2887 return BLE_PERIPHERAL_OK; 2888 } 2889 2890 void le_central_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 2891 hci_stack->le_scan_type = scan_type; 2892 hci_stack->le_scan_interval = scan_interval; 2893 hci_stack->le_scan_window = scan_window; 2894 hci_run(); 2895 } 2896 2897 le_command_status_t le_central_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 2898 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2899 if (!conn){ 2900 log_info("le_central_connect: no connection exists yet, creating context"); 2901 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2902 if (!conn){ 2903 // notify client that alloc failed 2904 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 2905 log_info("le_central_connect: failed to alloc hci_connection_t"); 2906 return BLE_PERIPHERAL_NOT_CONNECTED; // don't sent packet to controller 2907 } 2908 conn->state = SEND_CREATE_CONNECTION; 2909 log_info("le_central_connect: send create connection next"); 2910 hci_run(); 2911 return BLE_PERIPHERAL_OK; 2912 } 2913 2914 if (!hci_is_le_connection(conn) || 2915 conn->state == SEND_CREATE_CONNECTION || 2916 conn->state == SENT_CREATE_CONNECTION) { 2917 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 2918 log_error("le_central_connect: classic connection or connect is already being created"); 2919 return BLE_PERIPHERAL_IN_WRONG_STATE; 2920 } 2921 2922 log_info("le_central_connect: context exists with state %u", conn->state); 2923 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 2924 hci_run(); 2925 return BLE_PERIPHERAL_OK; 2926 } 2927 2928 // @assumption: only a single outgoing LE Connection exists 2929 static hci_connection_t * le_central_get_outgoing_connection(void){ 2930 linked_item_t *it; 2931 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 2932 hci_connection_t * conn = (hci_connection_t *) it; 2933 if (!hci_is_le_connection(conn)) continue; 2934 switch (conn->state){ 2935 case SEND_CREATE_CONNECTION: 2936 case SENT_CREATE_CONNECTION: 2937 return conn; 2938 default: 2939 break; 2940 }; 2941 } 2942 return NULL; 2943 } 2944 2945 le_command_status_t le_central_connect_cancel(void){ 2946 hci_connection_t * conn = le_central_get_outgoing_connection(); 2947 switch (conn->state){ 2948 case SEND_CREATE_CONNECTION: 2949 // skip sending create connection and emit event instead 2950 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 2951 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 2952 btstack_memory_hci_connection_free( conn ); 2953 break; 2954 case SENT_CREATE_CONNECTION: 2955 // request to send cancel connection 2956 conn->state = SEND_CANCEL_CONNECTION; 2957 hci_run(); 2958 break; 2959 default: 2960 break; 2961 } 2962 return BLE_PERIPHERAL_OK; 2963 } 2964 2965 /** 2966 * @brief Updates the connection parameters for a given LE connection 2967 * @param handle 2968 * @param conn_interval_min (unit: 1.25ms) 2969 * @param conn_interval_max (unit: 1.25ms) 2970 * @param conn_latency 2971 * @param supervision_timeout (unit: 10ms) 2972 * @returns 0 if ok 2973 */ 2974 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 2975 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 2976 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2977 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2978 connection->le_conn_interval_min = conn_interval_min; 2979 connection->le_conn_interval_max = conn_interval_max; 2980 connection->le_conn_latency = conn_latency; 2981 connection->le_supervision_timeout = supervision_timeout; 2982 hci_run(); 2983 return 0; 2984 } 2985 2986 /** 2987 * @brief Set Advertisement Data 2988 * @param advertising_data_length 2989 * @param advertising_data (max 31 octets) 2990 * @note data is not copied, pointer has to stay valid 2991 */ 2992 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 2993 hci_stack->le_advertisements_data_len = advertising_data_length; 2994 hci_stack->le_advertisements_data = advertising_data; 2995 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_DATA; 2996 // disable advertisements before setting data 2997 if (hci_stack->le_advertisements_enabled){ 2998 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 2999 } 3000 hci_run(); 3001 } 3002 3003 /** 3004 * @brief Set Advertisement Parameters 3005 * @param adv_int_min 3006 * @param adv_int_max 3007 * @param adv_type 3008 * @param own_address_type 3009 * @param direct_address_type 3010 * @param direct_address 3011 * @param channel_map 3012 * @param filter_policy 3013 * 3014 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3015 */ 3016 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3017 uint8_t own_address_type, uint8_t direct_address_typ, bd_addr_t direct_address, 3018 uint8_t channel_map, uint8_t filter_policy) { 3019 3020 hci_stack->le_advertisements_interval_min = adv_int_min; 3021 hci_stack->le_advertisements_interval_max = adv_int_max; 3022 hci_stack->le_advertisements_type = adv_type; 3023 hci_stack->le_advertisements_own_address_type = own_address_type; 3024 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3025 hci_stack->le_advertisements_channel_map = channel_map; 3026 hci_stack->le_advertisements_filter_policy = filter_policy; 3027 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3028 3029 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3030 // disable advertisements before changing params 3031 if (hci_stack->le_advertisements_enabled){ 3032 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3033 } 3034 hci_run(); 3035 } 3036 3037 /** 3038 * @brief Enable/Disable Advertisements 3039 * @param enabled 3040 */ 3041 void gap_advertisements_enable(int enabled){ 3042 hci_stack->le_advertisements_enabled = enabled; 3043 if (enabled && !hci_stack->le_advertisements_active){ 3044 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3045 } 3046 if (!enabled && hci_stack->le_advertisements_active){ 3047 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3048 } 3049 hci_run(); 3050 } 3051 3052 3053 le_command_status_t gap_disconnect(hci_con_handle_t handle){ 3054 hci_connection_t * conn = hci_connection_for_handle(handle); 3055 if (!conn){ 3056 hci_emit_disconnection_complete(handle, 0); 3057 return BLE_PERIPHERAL_OK; 3058 } 3059 conn->state = SEND_DISCONNECT; 3060 hci_run(); 3061 return BLE_PERIPHERAL_OK; 3062 } 3063 3064 /** 3065 * @brief Set callback for Bluetooth Hardware Error 3066 */ 3067 void hci_set_hardware_error_callback(void (*fn)(void)){ 3068 hci_stack->hardware_error_callback = fn; 3069 } 3070 3071 3072 void hci_disconnect_all(void){ 3073 linked_list_iterator_t it; 3074 linked_list_iterator_init(&it, &hci_stack->connections); 3075 while (linked_list_iterator_has_next(&it)){ 3076 hci_connection_t * con = (hci_connection_t*) linked_list_iterator_next(&it); 3077 if (con->state == SENT_DISCONNECT) continue; 3078 con->state = SEND_DISCONNECT; 3079 } 3080 hci_run(); 3081 } 3082