1 /* 2 * Copyright (C) 2009-2012 by Matthias Ringwald 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 MATTHIAS RINGWALD 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 [email protected] 34 * 35 */ 36 37 /* 38 * hci.c 39 * 40 * Created by Matthias Ringwald on 4/29/09. 41 * 42 */ 43 44 #include "btstack-config.h" 45 46 #include "hci.h" 47 #include "gap.h" 48 49 #include <stdarg.h> 50 #include <string.h> 51 #include <stdio.h> 52 53 #ifndef EMBEDDED 54 #ifdef _WIN32 55 #include "Winsock2.h" 56 #else 57 #include <unistd.h> // gethostbyname 58 #endif 59 #include <btstack/version.h> 60 #endif 61 62 #include "btstack_memory.h" 63 #include "debug.h" 64 #include "hci_dump.h" 65 66 #include <btstack/linked_list.h> 67 #include <btstack/hci_cmds.h> 68 69 #define HCI_CONNECTION_TIMEOUT_MS 10000 70 71 #define HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP 11 72 73 #ifdef USE_BLUETOOL 74 #include "../platforms/ios/src/bt_control_iphone.h" 75 #endif 76 77 static void hci_update_scan_enable(void); 78 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 79 static void hci_connection_timeout_handler(timer_source_t *timer); 80 static void hci_connection_timestamp(hci_connection_t *connection); 81 static int hci_power_control_on(void); 82 static void hci_power_control_off(void); 83 static void hci_state_reset(); 84 85 // the STACK is here 86 #ifndef HAVE_MALLOC 87 static hci_stack_t hci_stack_static; 88 #endif 89 static hci_stack_t * hci_stack = NULL; 90 91 // test helper 92 static uint8_t disable_l2cap_timeouts = 0; 93 94 /** 95 * create connection for given address 96 * 97 * @return connection OR NULL, if no memory left 98 */ 99 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 100 101 log_info("create_connection_for_addr %s", bd_addr_to_str(addr)); 102 hci_connection_t * conn = btstack_memory_hci_connection_get(); 103 if (!conn) return NULL; 104 BD_ADDR_COPY(conn->address, addr); 105 conn->address_type = addr_type; 106 conn->con_handle = 0xffff; 107 conn->authentication_flags = AUTH_FLAGS_NONE; 108 conn->bonding_flags = 0; 109 conn->requested_security_level = LEVEL_0; 110 linked_item_set_user(&conn->timeout.item, conn); 111 conn->timeout.process = hci_connection_timeout_handler; 112 hci_connection_timestamp(conn); 113 conn->acl_recombination_length = 0; 114 conn->acl_recombination_pos = 0; 115 conn->num_acl_packets_sent = 0; 116 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 117 linked_list_add(&hci_stack->connections, (linked_item_t *) conn); 118 return conn; 119 } 120 121 122 /** 123 * get le connection parameter range 124 * 125 * @return le connection parameter range struct 126 */ 127 le_connection_parameter_range_t gap_le_get_connection_parameter_range(){ 128 return hci_stack->le_connection_parameter_range; 129 } 130 131 /** 132 * set le connection parameter range 133 * 134 */ 135 136 void gap_le_set_connection_parameter_range(le_connection_parameter_range_t range){ 137 hci_stack->le_connection_parameter_range.le_conn_interval_min = range.le_conn_interval_min; 138 hci_stack->le_connection_parameter_range.le_conn_interval_max = range.le_conn_interval_max; 139 hci_stack->le_connection_parameter_range.le_conn_interval_min = range.le_conn_latency_min; 140 hci_stack->le_connection_parameter_range.le_conn_interval_max = range.le_conn_latency_max; 141 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = range.le_supervision_timeout_min; 142 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = range.le_supervision_timeout_max; 143 } 144 145 /** 146 * get hci connections iterator 147 * 148 * @return hci connections iterator 149 */ 150 151 void hci_connections_get_iterator(linked_list_iterator_t *it){ 152 linked_list_iterator_init(it, &hci_stack->connections); 153 } 154 155 /** 156 * get connection for a given handle 157 * 158 * @return connection OR NULL, if not found 159 */ 160 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 161 linked_list_iterator_t it; 162 linked_list_iterator_init(&it, &hci_stack->connections); 163 while (linked_list_iterator_has_next(&it)){ 164 hci_connection_t * item = (hci_connection_t *) linked_list_iterator_next(&it); 165 if ( item->con_handle == con_handle ) { 166 return item; 167 } 168 } 169 return NULL; 170 } 171 172 /** 173 * get connection for given address 174 * 175 * @return connection OR NULL, if not found 176 */ 177 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t * addr, bd_addr_type_t addr_type){ 178 linked_list_iterator_t it; 179 linked_list_iterator_init(&it, &hci_stack->connections); 180 while (linked_list_iterator_has_next(&it)){ 181 hci_connection_t * connection = (hci_connection_t *) linked_list_iterator_next(&it); 182 if (connection->address_type != addr_type) continue; 183 if (memcmp(addr, connection->address, 6) != 0) continue; 184 return connection; 185 } 186 return NULL; 187 } 188 189 static void hci_connection_timeout_handler(timer_source_t *timer){ 190 hci_connection_t * connection = (hci_connection_t *) linked_item_get_user(&timer->item); 191 #ifdef HAVE_TIME 192 struct timeval tv; 193 gettimeofday(&tv, NULL); 194 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 195 // connections might be timed out 196 hci_emit_l2cap_check_timeout(connection); 197 } 198 #endif 199 #ifdef HAVE_TICK 200 if (embedded_get_ticks() > connection->timestamp + embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 201 // connections might be timed out 202 hci_emit_l2cap_check_timeout(connection); 203 } 204 #endif 205 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 206 run_loop_add_timer(timer); 207 } 208 209 static void hci_connection_timestamp(hci_connection_t *connection){ 210 #ifdef HAVE_TIME 211 gettimeofday(&connection->timestamp, NULL); 212 #endif 213 #ifdef HAVE_TICK 214 connection->timestamp = embedded_get_ticks(); 215 #endif 216 } 217 218 219 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 220 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 221 } 222 223 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 224 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 225 } 226 227 228 /** 229 * add authentication flags and reset timer 230 * @note: assumes classic connection 231 */ 232 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 233 bd_addr_t addr; 234 bt_flip_addr(addr, *(bd_addr_t *) bd_addr); 235 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 236 if (conn) { 237 connectionSetAuthenticationFlags(conn, flags); 238 hci_connection_timestamp(conn); 239 } 240 } 241 242 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 243 hci_connection_t * conn = hci_connection_for_handle(handle); 244 if (!conn) return 0; 245 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 246 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 247 return 0; 248 } 249 250 void hci_drop_link_key_for_bd_addr(bd_addr_t *addr){ 251 if (hci_stack->remote_device_db) { 252 hci_stack->remote_device_db->delete_link_key(addr); 253 } 254 } 255 256 int hci_is_le_connection(hci_connection_t * connection){ 257 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 258 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 259 } 260 261 262 /** 263 * count connections 264 */ 265 static int nr_hci_connections(void){ 266 int count = 0; 267 linked_item_t *it; 268 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 269 return count; 270 } 271 272 /** 273 * Dummy handler called by HCI 274 */ 275 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 276 } 277 278 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 279 hci_connection_t * connection = hci_connection_for_handle(handle); 280 if (!connection) { 281 log_error("hci_number_outgoing_packets: connection for handle %u does not exist!", handle); 282 return 0; 283 } 284 return connection->num_acl_packets_sent; 285 } 286 287 uint8_t hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 288 289 int num_packets_sent_classic = 0; 290 int num_packets_sent_le = 0; 291 292 bd_addr_type_t address_type = BD_ADDR_TYPE_UNKNOWN; 293 294 linked_item_t *it; 295 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 296 hci_connection_t * connection = (hci_connection_t *) it; 297 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 298 num_packets_sent_classic += connection->num_acl_packets_sent; 299 } else { 300 num_packets_sent_le += connection->num_acl_packets_sent; 301 } 302 if (connection->con_handle == con_handle){ 303 address_type = connection->address_type; 304 } 305 } 306 307 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 308 int free_slots_le = 0; 309 310 if (free_slots_classic < 0){ 311 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); 312 return 0; 313 } 314 315 if (hci_stack->le_acl_packets_total_num){ 316 // if we have LE slots, they are used 317 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 318 if (free_slots_le < 0){ 319 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); 320 return 0; 321 } 322 } else { 323 // otherwise, classic slots are used for LE, too 324 free_slots_classic -= num_packets_sent_le; 325 if (free_slots_classic < 0){ 326 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); 327 return 0; 328 } 329 } 330 331 switch (address_type){ 332 case BD_ADDR_TYPE_UNKNOWN: 333 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 334 return 0; 335 336 case BD_ADDR_TYPE_CLASSIC: 337 return free_slots_classic; 338 339 default: 340 if (hci_stack->le_acl_packets_total_num){ 341 return free_slots_le; 342 } 343 return free_slots_classic; 344 } 345 } 346 347 348 // @deprecated 349 int hci_can_send_packet_now(uint8_t packet_type){ 350 switch (packet_type) { 351 case HCI_ACL_DATA_PACKET: 352 return hci_can_send_prepared_acl_packet_now(0); 353 case HCI_COMMAND_DATA_PACKET: 354 return hci_can_send_command_packet_now(); 355 default: 356 return 0; 357 } 358 } 359 360 // @deprecated 361 // same as hci_can_send_packet_now, but also checks if packet buffer is free for use 362 int hci_can_send_packet_now_using_packet_buffer(uint8_t packet_type){ 363 364 if (hci_stack->hci_packet_buffer_reserved) return 0; 365 366 switch (packet_type) { 367 case HCI_ACL_DATA_PACKET: 368 return hci_can_send_acl_packet_now(0); 369 case HCI_COMMAND_DATA_PACKET: 370 return hci_can_send_command_packet_now(); 371 default: 372 return 0; 373 } 374 } 375 376 377 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 378 int hci_can_send_command_packet_now(void){ 379 if (hci_stack->hci_packet_buffer_reserved) return 0; 380 381 // check for async hci transport implementations 382 if (hci_stack->hci_transport->can_send_packet_now){ 383 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 384 return 0; 385 } 386 } 387 388 return hci_stack->num_cmd_packets > 0; 389 } 390 391 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 392 // check for async hci transport implementations 393 if (hci_stack->hci_transport->can_send_packet_now){ 394 if (!hci_stack->hci_transport->can_send_packet_now(HCI_ACL_DATA_PACKET)){ 395 return 0; 396 } 397 } 398 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 399 } 400 401 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 402 if (hci_stack->hci_packet_buffer_reserved) return 0; 403 return hci_can_send_prepared_acl_packet_now(con_handle); 404 } 405 406 // used for internal checks in l2cap[-le].c 407 int hci_is_packet_buffer_reserved(void){ 408 return hci_stack->hci_packet_buffer_reserved; 409 } 410 411 // reserves outgoing packet buffer. @returns 1 if successful 412 int hci_reserve_packet_buffer(void){ 413 if (hci_stack->hci_packet_buffer_reserved) { 414 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 415 return 0; 416 } 417 hci_stack->hci_packet_buffer_reserved = 1; 418 return 1; 419 } 420 421 void hci_release_packet_buffer(void){ 422 hci_stack->hci_packet_buffer_reserved = 0; 423 } 424 425 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 426 int hci_transport_synchronous(void){ 427 return hci_stack->hci_transport->can_send_packet_now == NULL; 428 } 429 430 uint16_t hci_max_acl_le_data_packet_length(void){ 431 return hci_stack->le_data_packets_length > 0 ? hci_stack->le_data_packets_length : hci_stack->acl_data_packet_length; 432 } 433 434 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 435 436 // 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); 437 438 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 439 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 440 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 441 max_acl_data_packet_length = hci_stack->le_data_packets_length; 442 } 443 444 // testing: reduce buffer to minimum 445 // max_acl_data_packet_length = 52; 446 447 int err; 448 // multiple packets could be send on a synchronous HCI transport 449 while (1){ 450 451 // get current data 452 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 453 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 454 int more_fragments = 0; 455 456 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 457 if (current_acl_data_packet_length > max_acl_data_packet_length){ 458 more_fragments = 1; 459 current_acl_data_packet_length = max_acl_data_packet_length; 460 } 461 462 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 463 if (acl_header_pos > 0){ 464 uint16_t handle_and_flags = READ_BT_16(hci_stack->hci_packet_buffer, 0); 465 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 466 bt_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 467 } 468 469 // update header len 470 bt_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 471 472 // count packet 473 connection->num_acl_packets_sent++; 474 475 // send packet 476 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 477 const int size = current_acl_data_packet_length + 4; 478 // hexdump(packet, size); 479 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 480 481 // done yet? 482 if (!more_fragments) break; 483 484 // update start of next fragment to send 485 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 486 487 // can send more? 488 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 489 } 490 491 // done 492 hci_stack->acl_fragmentation_pos = 0; 493 hci_stack->acl_fragmentation_total_size = 0; 494 495 // free buffer now for synchronous transport 496 if (hci_transport_synchronous()){ 497 hci_release_packet_buffer(); 498 } 499 500 return err; 501 } 502 503 // pre: caller has reserved the packet buffer 504 int hci_send_acl_packet_buffer(int size){ 505 506 // log_info("hci_send_acl_packet_buffer size %u", size); 507 508 if (!hci_stack->hci_packet_buffer_reserved) { 509 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 510 return 0; 511 } 512 513 uint8_t * packet = hci_stack->hci_packet_buffer; 514 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 515 516 // check for free places on Bluetooth module 517 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 518 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 519 hci_release_packet_buffer(); 520 return BTSTACK_ACL_BUFFERS_FULL; 521 } 522 523 hci_connection_t *connection = hci_connection_for_handle( con_handle); 524 if (!connection) { 525 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 526 hci_release_packet_buffer(); 527 return 0; 528 } 529 hci_connection_timestamp(connection); 530 531 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 532 533 // setup data 534 hci_stack->acl_fragmentation_total_size = size; 535 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 536 537 return hci_send_acl_packet_fragments(connection); 538 } 539 540 static void acl_handler(uint8_t *packet, int size){ 541 542 // log_info("acl_handler: size %u", size); 543 544 // get info 545 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 546 hci_connection_t *conn = hci_connection_for_handle(con_handle); 547 uint8_t acl_flags = READ_ACL_FLAGS(packet); 548 uint16_t acl_length = READ_ACL_LENGTH(packet); 549 550 // ignore non-registered handle 551 if (!conn){ 552 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 553 return; 554 } 555 556 // assert packet is complete 557 if (acl_length + 4 != size){ 558 log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4); 559 return; 560 } 561 562 // update idle timestamp 563 hci_connection_timestamp(conn); 564 565 // handle different packet types 566 switch (acl_flags & 0x03) { 567 568 case 0x01: // continuation fragment 569 570 // sanity check 571 if (conn->acl_recombination_pos == 0) { 572 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 573 return; 574 } 575 576 // append fragment payload (header already stored) 577 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 578 conn->acl_recombination_pos += acl_length; 579 580 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 581 // conn->acl_recombination_pos, conn->acl_recombination_length); 582 583 // forward complete L2CAP packet if complete. 584 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 585 586 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, &conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 587 // reset recombination buffer 588 conn->acl_recombination_length = 0; 589 conn->acl_recombination_pos = 0; 590 } 591 break; 592 593 case 0x02: { // first fragment 594 595 // sanity check 596 if (conn->acl_recombination_pos) { 597 log_error( "ACL First Fragment but data in buffer for handle 0x%02x", con_handle); 598 return; 599 } 600 601 // peek into L2CAP packet! 602 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 603 604 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 605 606 // compare fragment size to L2CAP packet size 607 if (acl_length >= l2cap_length + 4){ 608 609 // forward fragment as L2CAP packet 610 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 611 612 } else { 613 // store first fragment and tweak acl length for complete package 614 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 615 conn->acl_recombination_pos = acl_length + 4; 616 conn->acl_recombination_length = l2cap_length; 617 bt_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 618 } 619 break; 620 621 } 622 default: 623 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 624 return; 625 } 626 627 // execute main loop 628 hci_run(); 629 } 630 631 static void hci_shutdown_connection(hci_connection_t *conn){ 632 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 633 634 run_loop_remove_timer(&conn->timeout); 635 636 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 637 btstack_memory_hci_connection_free( conn ); 638 639 // now it's gone 640 hci_emit_nr_connections_changed(); 641 } 642 643 static const uint16_t packet_type_sizes[] = { 644 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 645 HCI_ACL_DH1_SIZE, 0, 0, 0, 646 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 647 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 648 }; 649 static const uint8_t packet_type_feature_requirement_bit[] = { 650 0, // 3 slot packets 651 1, // 5 slot packets 652 25, // EDR 2 mpbs 653 26, // EDR 3 mbps 654 39, // 3 slot EDR packts 655 40, // 5 slot EDR packet 656 }; 657 static const uint16_t packet_type_feature_packet_mask[] = { 658 0x0f00, // 3 slot packets 659 0xf000, // 5 slot packets 660 0x1102, // EDR 2 mpbs 661 0x2204, // EDR 3 mbps 662 0x0300, // 3 slot EDR packts 663 0x3000, // 5 slot EDR packet 664 }; 665 666 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 667 // enable packet types based on size 668 uint16_t packet_types = 0; 669 int i; 670 for (i=0;i<16;i++){ 671 if (packet_type_sizes[i] == 0) continue; 672 if (packet_type_sizes[i] <= buffer_size){ 673 packet_types |= 1 << i; 674 } 675 } 676 // disable packet types due to missing local supported features 677 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 678 int bit_idx = packet_type_feature_requirement_bit[i]; 679 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 680 if (feature_set) continue; 681 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 682 packet_types &= ~packet_type_feature_packet_mask[i]; 683 } 684 // flip bits for "may not be used" 685 packet_types ^= 0x3306; 686 return packet_types; 687 } 688 689 uint16_t hci_usable_acl_packet_types(void){ 690 return hci_stack->packet_types; 691 } 692 693 uint8_t* hci_get_outgoing_packet_buffer(void){ 694 // hci packet buffer is >= acl data packet length 695 return hci_stack->hci_packet_buffer; 696 } 697 698 uint16_t hci_max_acl_data_packet_length(void){ 699 return hci_stack->acl_data_packet_length; 700 } 701 702 int hci_non_flushable_packet_boundary_flag_supported(void){ 703 // No. 54, byte 6, bit 6 704 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 705 } 706 707 int hci_ssp_supported(void){ 708 // No. 51, byte 6, bit 3 709 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 710 } 711 712 int hci_classic_supported(void){ 713 // No. 37, byte 4, bit 5, = No BR/EDR Support 714 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 715 } 716 717 int hci_le_supported(void){ 718 #ifdef HAVE_BLE 719 // No. 37, byte 4, bit 6 = LE Supported (Controller) 720 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 721 #else 722 return 0; 723 #endif 724 } 725 726 // get addr type and address used in advertisement packets 727 void hci_le_advertisement_address(uint8_t * addr_type, bd_addr_t * addr){ 728 *addr_type = hci_stack->adv_addr_type; 729 if (hci_stack->adv_addr_type){ 730 memcpy(addr, hci_stack->adv_address, 6); 731 } else { 732 memcpy(addr, hci_stack->local_bd_addr, 6); 733 } 734 } 735 736 #ifdef HAVE_BLE 737 void le_handle_advertisement_report(uint8_t *packet, int size){ 738 int offset = 3; 739 int num_reports = packet[offset]; 740 offset += 1; 741 742 int i; 743 log_info("HCI: handle adv report with num reports: %d", num_reports); 744 for (i=0; i<num_reports;i++){ 745 uint8_t data_length = packet[offset + 8]; 746 uint8_t event_size = 10 + data_length; 747 uint8_t event[2 + event_size ]; 748 int pos = 0; 749 event[pos++] = GAP_LE_ADVERTISING_REPORT; 750 event[pos++] = event_size; 751 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 752 offset += 8; 753 pos += 8; 754 event[pos++] = packet[offset + 1 + data_length]; // rssi 755 event[pos++] = packet[offset++]; //data_length; 756 memcpy(&event[pos], &packet[offset], data_length); 757 pos += data_length; 758 offset += data_length + 1; // rssi 759 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 760 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 761 } 762 } 763 #endif 764 765 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 766 uint8_t command_completed = 0; 767 if ((hci_stack->substate % 2) == 0) return; 768 // odd: waiting for event 769 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){ 770 uint16_t opcode = READ_BT_16(packet,3); 771 if (opcode == hci_stack->last_cmd_opcode){ 772 command_completed = 1; 773 log_info("Command complete for expected opcode %04x -> new substate %u", opcode, hci_stack->substate); 774 } else { 775 log_info("Command complete for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 776 } 777 } 778 if (packet[0] == HCI_EVENT_COMMAND_STATUS){ 779 uint8_t status = packet[2]; 780 uint16_t opcode = READ_BT_16(packet,4); 781 if (opcode == hci_stack->last_cmd_opcode){ 782 if (status){ 783 command_completed = 1; 784 log_error("Command status error 0x%02x for expected opcode %04x -> new substate %u", status, opcode, hci_stack->substate); 785 } else { 786 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 787 } 788 } else { 789 log_info("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 790 } 791 } 792 793 if (!command_completed) return; 794 795 switch(hci_stack->substate >> 1){ 796 default: 797 hci_stack->substate++; 798 break; 799 } 800 } 801 802 static void hci_initializing_state_machine(){ 803 // log_info("hci_init: substate %u", hci_stack->substate); 804 if (hci_stack->substate % 2) { 805 // odd: waiting for command completion 806 return; 807 } 808 switch (hci_stack->substate >> 1){ 809 case 0: // RESET 810 hci_state_reset(); 811 812 hci_send_cmd(&hci_reset); 813 if (hci_stack->config == NULL || ((hci_uart_config_t *)hci_stack->config)->baudrate_main == 0){ 814 // skip baud change 815 hci_stack->substate = 4; // >> 1 = 2 816 } 817 break; 818 case 1: // SEND BAUD CHANGE 819 hci_stack->control->baudrate_cmd(hci_stack->config, ((hci_uart_config_t *)hci_stack->config)->baudrate_main, hci_stack->hci_packet_buffer); 820 hci_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0); 821 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 822 break; 823 case 2: // LOCAL BAUD CHANGE 824 log_info("Local baud rate change"); 825 hci_stack->hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack->config)->baudrate_main); 826 hci_stack->substate += 2; 827 // break missing here for fall through 828 829 case 3: 830 log_info("Custom init"); 831 // Custom initialization 832 if (hci_stack->control && hci_stack->control->next_cmd){ 833 int valid_cmd = (*hci_stack->control->next_cmd)(hci_stack->config, hci_stack->hci_packet_buffer); 834 if (valid_cmd){ 835 int size = 3 + hci_stack->hci_packet_buffer[2]; 836 hci_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0); 837 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 838 hci_stack->substate = 4; // more init commands 839 break; 840 } 841 log_info("hci_run: init script done"); 842 } 843 // otherwise continue 844 hci_send_cmd(&hci_read_bd_addr); 845 break; 846 case 4: 847 hci_send_cmd(&hci_read_buffer_size); 848 break; 849 case 5: 850 hci_send_cmd(&hci_read_local_supported_features); 851 break; 852 case 6: 853 if (hci_le_supported()){ 854 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 855 } else { 856 // Kensington Bluetoot 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 857 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 858 } 859 860 // skip Classic init commands for LE only chipsets 861 if (!hci_classic_supported()){ 862 if (hci_le_supported()){ 863 hci_stack->substate = 11 << 1; // skip all classic command 864 } else { 865 log_error("Neither BR/EDR nor LE supported"); 866 hci_stack->substate = 14 << 1; // skip all 867 } 868 } 869 break; 870 case 7: 871 if (hci_ssp_supported()){ 872 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 873 break; 874 } 875 hci_stack->substate += 2; 876 // break missing here for fall through 877 878 case 8: 879 // ca. 15 sec 880 hci_send_cmd(&hci_write_page_timeout, 0x6000); 881 break; 882 case 9: 883 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 884 break; 885 case 10: 886 if (hci_stack->local_name){ 887 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 888 } else { 889 char hostname[30]; 890 #ifdef EMBEDDED 891 // BTstack-11:22:33:44:55:66 892 strcpy(hostname, "BTstack "); 893 strcat(hostname, bd_addr_to_str(hci_stack->local_bd_addr)); 894 log_info("---> Name %s", hostname); 895 #else 896 // hostname for POSIX systems 897 gethostname(hostname, 30); 898 hostname[29] = '\0'; 899 #endif 900 hci_send_cmd(&hci_write_local_name, hostname); 901 } 902 break; 903 case 11: 904 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 905 if (!hci_le_supported()){ 906 // SKIP LE init for Classic only configuration 907 hci_stack->substate = 14 << 1; 908 } 909 break; 910 911 #ifdef HAVE_BLE 912 // LE INIT 913 case 12: 914 hci_send_cmd(&hci_le_read_buffer_size); 915 break; 916 case 13: 917 // LE Supported Host = 1, Simultaneous Host = 0 918 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 919 break; 920 case 14: 921 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 922 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 923 break; 924 #endif 925 926 // DONE 927 case 15: 928 // done. 929 hci_stack->state = HCI_STATE_WORKING; 930 hci_emit_state(); 931 break; 932 default: 933 break; 934 } 935 hci_stack->substate++; 936 } 937 938 // avoid huge local variables 939 #ifndef EMBEDDED 940 static device_name_t device_name; 941 #endif 942 static void event_handler(uint8_t *packet, int size){ 943 944 uint16_t event_length = packet[1]; 945 946 // assert packet is complete 947 if (size != event_length + 2){ 948 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 949 return; 950 } 951 952 bd_addr_t addr; 953 bd_addr_type_t addr_type; 954 uint8_t link_type; 955 hci_con_handle_t handle; 956 hci_connection_t * conn; 957 int i; 958 959 // log_info("HCI:EVENT:%02x", packet[0]); 960 961 switch (packet[0]) { 962 963 case HCI_EVENT_COMMAND_COMPLETE: 964 // get num cmd packets 965 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u", hci_stack->num_cmd_packets, packet[2]); 966 hci_stack->num_cmd_packets = packet[2]; 967 968 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 969 // from offset 5 970 // status 971 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 972 hci_stack->acl_data_packet_length = READ_BT_16(packet, 6); 973 // ignore: SCO data packet len (8) 974 hci_stack->acl_packets_total_num = packet[9]; 975 // ignore: total num SCO packets 976 if (hci_stack->state == HCI_STATE_INITIALIZING){ 977 // determine usable ACL payload size 978 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 979 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 980 } 981 log_info("hci_read_buffer_size: used size %u, count %u", 982 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num); 983 } 984 } 985 #ifdef HAVE_BLE 986 if (COMMAND_COMPLETE_EVENT(packet, hci_le_read_buffer_size)){ 987 hci_stack->le_data_packets_length = READ_BT_16(packet, 6); 988 hci_stack->le_acl_packets_total_num = packet[8]; 989 // determine usable ACL payload size 990 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 991 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 992 } 993 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 994 } 995 #endif 996 // Dump local address 997 if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)) { 998 bt_flip_addr(hci_stack->local_bd_addr, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1]); 999 log_info("Local Address, Status: 0x%02x: Addr: %s", 1000 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1001 } 1002 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 1003 hci_emit_discoverable_enabled(hci_stack->discoverable); 1004 } 1005 // Note: HCI init checks 1006 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_features)){ 1007 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1008 log_info("Local Supported Features: 0x%02x%02x%02x%02x%02x%02x%02x%02x", 1009 hci_stack->local_supported_features[0], hci_stack->local_supported_features[1], 1010 hci_stack->local_supported_features[2], hci_stack->local_supported_features[3], 1011 hci_stack->local_supported_features[4], hci_stack->local_supported_features[5], 1012 hci_stack->local_supported_features[6], hci_stack->local_supported_features[7]); 1013 1014 // determine usable ACL packet types based buffer size and supported features 1015 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(hci_stack->acl_data_packet_length, &hci_stack->local_supported_features[0]); 1016 log_info("packet types %04x", hci_stack->packet_types); 1017 1018 // Classic/LE 1019 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1020 } 1021 break; 1022 1023 case HCI_EVENT_COMMAND_STATUS: 1024 // get num cmd packets 1025 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u", hci_stack->num_cmd_packets, packet[3]); 1026 hci_stack->num_cmd_packets = packet[3]; 1027 break; 1028 1029 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1030 int offset = 3; 1031 for (i=0; i<packet[2];i++){ 1032 handle = READ_BT_16(packet, offset); 1033 offset += 2; 1034 uint16_t num_packets = READ_BT_16(packet, offset); 1035 offset += 2; 1036 1037 conn = hci_connection_for_handle(handle); 1038 if (!conn){ 1039 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1040 continue; 1041 } 1042 1043 if (conn->num_acl_packets_sent >= num_packets){ 1044 conn->num_acl_packets_sent -= num_packets; 1045 } else { 1046 log_error("hci_number_completed_packets, more slots freed then sent."); 1047 conn->num_acl_packets_sent = 0; 1048 } 1049 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1050 } 1051 break; 1052 } 1053 case HCI_EVENT_CONNECTION_REQUEST: 1054 bt_flip_addr(addr, &packet[2]); 1055 // TODO: eval COD 8-10 1056 link_type = packet[11]; 1057 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1058 if (link_type == 1) { // ACL 1059 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1060 if (!conn) { 1061 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1062 } 1063 if (!conn) { 1064 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1065 hci_stack->decline_reason = 0x0d; 1066 BD_ADDR_COPY(hci_stack->decline_addr, addr); 1067 break; 1068 } 1069 conn->state = RECEIVED_CONNECTION_REQUEST; 1070 hci_run(); 1071 } else { 1072 // SYNCHRONOUS CONNECTION LIMIT TO A DEVICE EXCEEDED (0X0A) 1073 hci_stack->decline_reason = 0x0a; 1074 BD_ADDR_COPY(hci_stack->decline_addr, addr); 1075 } 1076 break; 1077 1078 case HCI_EVENT_CONNECTION_COMPLETE: 1079 // Connection management 1080 bt_flip_addr(addr, &packet[5]); 1081 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1082 addr_type = BD_ADDR_TYPE_CLASSIC; 1083 conn = hci_connection_for_bd_addr_and_type(&addr, addr_type); 1084 if (conn) { 1085 if (!packet[2]){ 1086 conn->state = OPEN; 1087 conn->con_handle = READ_BT_16(packet, 3); 1088 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1089 1090 // restart timer 1091 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1092 run_loop_add_timer(&conn->timeout); 1093 1094 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1095 1096 hci_emit_nr_connections_changed(); 1097 } else { 1098 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1099 uint8_t status = packet[2]; 1100 bd_addr_t bd_address; 1101 memcpy(&bd_address, conn->address, 6); 1102 1103 // connection failed, remove entry 1104 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 1105 btstack_memory_hci_connection_free( conn ); 1106 1107 // notify client if dedicated bonding 1108 if (notify_dedicated_bonding_failed){ 1109 log_info("hci notify_dedicated_bonding_failed"); 1110 hci_emit_dedicated_bonding_result(bd_address, status); 1111 } 1112 1113 // if authentication error, also delete link key 1114 if (packet[2] == 0x05) { 1115 hci_drop_link_key_for_bd_addr(&addr); 1116 } 1117 } 1118 } 1119 break; 1120 1121 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1122 handle = READ_BT_16(packet, 3); 1123 conn = hci_connection_for_handle(handle); 1124 if (!conn) break; 1125 if (!packet[2]){ 1126 uint8_t * features = &packet[5]; 1127 if (features[6] & (1 << 3)){ 1128 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1129 } 1130 } 1131 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1132 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x", conn->bonding_flags); 1133 if (conn->bonding_flags & BONDING_DEDICATED){ 1134 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1135 } 1136 break; 1137 1138 case HCI_EVENT_LINK_KEY_REQUEST: 1139 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1140 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1141 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1142 if (hci_stack->bondable && !hci_stack->remote_device_db) break; 1143 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1144 hci_run(); 1145 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1146 return; 1147 1148 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1149 bt_flip_addr(addr, &packet[2]); 1150 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1151 if (!conn) break; 1152 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1153 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1154 // Change Connection Encryption keeps link key type 1155 if (link_key_type != CHANGED_COMBINATION_KEY){ 1156 conn->link_key_type = link_key_type; 1157 } 1158 if (!hci_stack->remote_device_db) break; 1159 hci_stack->remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8], conn->link_key_type); 1160 // still forward event to allow dismiss of pairing dialog 1161 break; 1162 } 1163 1164 case HCI_EVENT_PIN_CODE_REQUEST: 1165 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1166 // non-bondable mode: pin code negative reply will be sent 1167 if (!hci_stack->bondable){ 1168 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1169 hci_run(); 1170 return; 1171 } 1172 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1173 if (!hci_stack->remote_device_db) break; 1174 bt_flip_addr(addr, &packet[2]); 1175 hci_stack->remote_device_db->delete_link_key(&addr); 1176 break; 1177 1178 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1179 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1180 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1181 break; 1182 1183 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1184 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1185 if (!hci_stack->ssp_auto_accept) break; 1186 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1187 break; 1188 1189 case HCI_EVENT_USER_PASSKEY_REQUEST: 1190 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1191 if (!hci_stack->ssp_auto_accept) break; 1192 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1193 break; 1194 1195 case HCI_EVENT_ENCRYPTION_CHANGE: 1196 handle = READ_BT_16(packet, 3); 1197 conn = hci_connection_for_handle(handle); 1198 if (!conn) break; 1199 if (packet[2] == 0) { 1200 if (packet[5]){ 1201 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1202 } else { 1203 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1204 } 1205 } 1206 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1207 break; 1208 1209 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1210 handle = READ_BT_16(packet, 3); 1211 conn = hci_connection_for_handle(handle); 1212 if (!conn) break; 1213 1214 // dedicated bonding: send result and disconnect 1215 if (conn->bonding_flags & BONDING_DEDICATED){ 1216 conn->bonding_flags &= ~BONDING_DEDICATED; 1217 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1218 conn->bonding_status = packet[2]; 1219 break; 1220 } 1221 1222 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1223 // link key sufficient for requested security 1224 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1225 break; 1226 } 1227 // not enough 1228 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1229 break; 1230 1231 #ifndef EMBEDDED 1232 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1233 if (!hci_stack->remote_device_db) break; 1234 if (packet[2]) break; // status not ok 1235 bt_flip_addr(addr, &packet[3]); 1236 // fix for invalid remote names - terminate on 0xff 1237 for (i=0; i<248;i++){ 1238 if (packet[9+i] == 0xff){ 1239 packet[9+i] = 0; 1240 break; 1241 } 1242 } 1243 memset(&device_name, 0, sizeof(device_name_t)); 1244 strncpy((char*) device_name, (char*) &packet[9], 248); 1245 hci_stack->remote_device_db->put_name(&addr, &device_name); 1246 break; 1247 1248 case HCI_EVENT_INQUIRY_RESULT: 1249 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI:{ 1250 if (!hci_stack->remote_device_db) break; 1251 // first send inq result packet 1252 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 1253 // then send cached remote names 1254 int offset = 3; 1255 for (i=0; i<packet[2];i++){ 1256 bt_flip_addr(addr, &packet[offset]); 1257 offset += 14; // 6 + 1 + 1 + 1 + 3 + 2; 1258 if (hci_stack->remote_device_db->get_name(&addr, &device_name)){ 1259 hci_emit_remote_name_cached(&addr, &device_name); 1260 } 1261 } 1262 return; 1263 } 1264 #endif 1265 1266 // HCI_EVENT_DISCONNECTION_COMPLETE 1267 // has been moved down, to first notify stack before shutting connection down 1268 1269 case HCI_EVENT_HARDWARE_ERROR: 1270 if(hci_stack->control && hci_stack->control->hw_error){ 1271 (*hci_stack->control->hw_error)(); 1272 } else { 1273 // if no special requests, just reboot stack 1274 hci_power_control_off(); 1275 hci_power_control_on(); 1276 } 1277 break; 1278 1279 case DAEMON_EVENT_HCI_PACKET_SENT: 1280 // free packet buffer for asynchronous transport 1281 if (hci_transport_synchronous()) break; 1282 hci_stack->hci_packet_buffer_reserved = 0; 1283 break; 1284 1285 #ifdef HAVE_BLE 1286 case HCI_EVENT_LE_META: 1287 switch (packet[2]){ 1288 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1289 log_info("advertising report received"); 1290 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1291 le_handle_advertisement_report(packet, size); 1292 break; 1293 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1294 // Connection management 1295 bt_flip_addr(addr, &packet[8]); 1296 addr_type = (bd_addr_type_t)packet[7]; 1297 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1298 // LE connections are auto-accepted, so just create a connection if there isn't one already 1299 conn = hci_connection_for_bd_addr_and_type(&addr, addr_type); 1300 if (packet[3]){ 1301 if (conn){ 1302 // outgoing connection failed, remove entry 1303 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 1304 btstack_memory_hci_connection_free( conn ); 1305 } 1306 // if authentication error, also delete link key 1307 if (packet[3] == 0x05) { 1308 hci_drop_link_key_for_bd_addr(&addr); 1309 } 1310 break; 1311 } 1312 if (!conn){ 1313 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1314 } 1315 if (!conn){ 1316 // no memory 1317 break; 1318 } 1319 1320 conn->state = OPEN; 1321 conn->con_handle = READ_BT_16(packet, 4); 1322 1323 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1324 1325 // restart timer 1326 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1327 // run_loop_add_timer(&conn->timeout); 1328 1329 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1330 1331 hci_emit_nr_connections_changed(); 1332 break; 1333 1334 // log_info("LE buffer size: %u, count %u", READ_BT_16(packet,6), packet[8]); 1335 1336 default: 1337 break; 1338 } 1339 break; 1340 #endif 1341 default: 1342 break; 1343 } 1344 1345 // handle BT initialization 1346 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1347 hci_initializing_event_handler(packet, size); 1348 } 1349 1350 // help with BT sleep 1351 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1352 && hci_stack->substate == 1 1353 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 1354 hci_stack->substate++; 1355 } 1356 1357 // notify upper stack 1358 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 1359 1360 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 1361 if (packet[0] == HCI_EVENT_DISCONNECTION_COMPLETE){ 1362 if (!packet[2]){ 1363 handle = READ_BT_16(packet, 3); 1364 hci_connection_t * conn = hci_connection_for_handle(handle); 1365 if (conn) { 1366 uint8_t status = conn->bonding_status; 1367 bd_addr_t bd_address; 1368 memcpy(&bd_address, conn->address, 6); 1369 hci_shutdown_connection(conn); 1370 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 1371 hci_emit_dedicated_bonding_result(bd_address, status); 1372 } 1373 } 1374 } 1375 } 1376 1377 // execute main loop 1378 hci_run(); 1379 } 1380 1381 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1382 switch (packet_type) { 1383 case HCI_EVENT_PACKET: 1384 event_handler(packet, size); 1385 break; 1386 case HCI_ACL_DATA_PACKET: 1387 acl_handler(packet, size); 1388 break; 1389 default: 1390 break; 1391 } 1392 } 1393 1394 /** Register HCI packet handlers */ 1395 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 1396 hci_stack->packet_handler = handler; 1397 } 1398 1399 static void hci_state_reset(){ 1400 // no connections yet 1401 hci_stack->connections = NULL; 1402 1403 // keep discoverable/connectable as this has been requested by the client(s) 1404 // hci_stack->discoverable = 0; 1405 // hci_stack->connectable = 0; 1406 // hci_stack->bondable = 1; 1407 1408 // buffer is free 1409 hci_stack->hci_packet_buffer_reserved = 0; 1410 1411 // no pending cmds 1412 hci_stack->decline_reason = 0; 1413 hci_stack->new_scan_enable_value = 0xff; 1414 1415 // LE 1416 hci_stack->adv_addr_type = 0; 1417 memset(hci_stack->adv_address, 0, 6); 1418 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1419 hci_stack->le_scan_type = 0xff; 1420 hci_stack->le_connection_parameter_range.le_conn_interval_min = 0x0006; 1421 hci_stack->le_connection_parameter_range.le_conn_interval_max = 0x0C80; 1422 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0x0000; 1423 hci_stack->le_connection_parameter_range.le_conn_latency_max = 0x03E8; 1424 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 0x000A; 1425 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 0x0C80; 1426 } 1427 1428 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 1429 1430 #ifdef HAVE_MALLOC 1431 if (!hci_stack) { 1432 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 1433 } 1434 #else 1435 hci_stack = &hci_stack_static; 1436 #endif 1437 memset(hci_stack, 0, sizeof(hci_stack_t)); 1438 1439 // reference to use transport layer implementation 1440 hci_stack->hci_transport = transport; 1441 1442 // references to used control implementation 1443 hci_stack->control = control; 1444 1445 // reference to used config 1446 hci_stack->config = config; 1447 1448 // higher level handler 1449 hci_stack->packet_handler = dummy_handler; 1450 1451 // store and open remote device db 1452 hci_stack->remote_device_db = remote_device_db; 1453 if (hci_stack->remote_device_db) { 1454 hci_stack->remote_device_db->open(); 1455 } 1456 1457 // max acl payload size defined in config.h 1458 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1459 1460 // register packet handlers with transport 1461 transport->register_packet_handler(&packet_handler); 1462 1463 hci_stack->state = HCI_STATE_OFF; 1464 1465 // class of device 1466 hci_stack->class_of_device = 0x007a020c; // Smartphone 1467 1468 // bondable by default 1469 hci_stack->bondable = 1; 1470 1471 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 1472 hci_stack->ssp_enable = 1; 1473 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 1474 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 1475 hci_stack->ssp_auto_accept = 1; 1476 1477 hci_state_reset(); 1478 } 1479 1480 void hci_close(){ 1481 // close remote device db 1482 if (hci_stack->remote_device_db) { 1483 hci_stack->remote_device_db->close(); 1484 } 1485 while (hci_stack->connections) { 1486 // cancel all l2cap connections 1487 hci_emit_disconnection_complete(((hci_connection_t *) hci_stack->connections)->con_handle, 0x16); // terminated by local host 1488 hci_shutdown_connection((hci_connection_t *) hci_stack->connections); 1489 } 1490 hci_power_control(HCI_POWER_OFF); 1491 1492 #ifdef HAVE_MALLOC 1493 free(hci_stack); 1494 #endif 1495 hci_stack = NULL; 1496 } 1497 1498 void hci_set_class_of_device(uint32_t class_of_device){ 1499 hci_stack->class_of_device = class_of_device; 1500 } 1501 1502 void hci_disable_l2cap_timeout_check(){ 1503 disable_l2cap_timeouts = 1; 1504 } 1505 // State-Module-Driver overview 1506 // state module low-level 1507 // HCI_STATE_OFF off close 1508 // HCI_STATE_INITIALIZING, on open 1509 // HCI_STATE_WORKING, on open 1510 // HCI_STATE_HALTING, on open 1511 // HCI_STATE_SLEEPING, off/sleep close 1512 // HCI_STATE_FALLING_ASLEEP on open 1513 1514 static int hci_power_control_on(void){ 1515 1516 // power on 1517 int err = 0; 1518 if (hci_stack->control && hci_stack->control->on){ 1519 err = (*hci_stack->control->on)(hci_stack->config); 1520 } 1521 if (err){ 1522 log_error( "POWER_ON failed"); 1523 hci_emit_hci_open_failed(); 1524 return err; 1525 } 1526 1527 // open low-level device 1528 err = hci_stack->hci_transport->open(hci_stack->config); 1529 if (err){ 1530 log_error( "HCI_INIT failed, turning Bluetooth off again"); 1531 if (hci_stack->control && hci_stack->control->off){ 1532 (*hci_stack->control->off)(hci_stack->config); 1533 } 1534 hci_emit_hci_open_failed(); 1535 return err; 1536 } 1537 return 0; 1538 } 1539 1540 static void hci_power_control_off(void){ 1541 1542 log_info("hci_power_control_off"); 1543 1544 // close low-level device 1545 hci_stack->hci_transport->close(hci_stack->config); 1546 1547 log_info("hci_power_control_off - hci_transport closed"); 1548 1549 // power off 1550 if (hci_stack->control && hci_stack->control->off){ 1551 (*hci_stack->control->off)(hci_stack->config); 1552 } 1553 1554 log_info("hci_power_control_off - control closed"); 1555 1556 hci_stack->state = HCI_STATE_OFF; 1557 } 1558 1559 static void hci_power_control_sleep(void){ 1560 1561 log_info("hci_power_control_sleep"); 1562 1563 #if 0 1564 // don't close serial port during sleep 1565 1566 // close low-level device 1567 hci_stack->hci_transport->close(hci_stack->config); 1568 #endif 1569 1570 // sleep mode 1571 if (hci_stack->control && hci_stack->control->sleep){ 1572 (*hci_stack->control->sleep)(hci_stack->config); 1573 } 1574 1575 hci_stack->state = HCI_STATE_SLEEPING; 1576 } 1577 1578 static int hci_power_control_wake(void){ 1579 1580 log_info("hci_power_control_wake"); 1581 1582 // wake on 1583 if (hci_stack->control && hci_stack->control->wake){ 1584 (*hci_stack->control->wake)(hci_stack->config); 1585 } 1586 1587 #if 0 1588 // open low-level device 1589 int err = hci_stack->hci_transport->open(hci_stack->config); 1590 if (err){ 1591 log_error( "HCI_INIT failed, turning Bluetooth off again"); 1592 if (hci_stack->control && hci_stack->control->off){ 1593 (*hci_stack->control->off)(hci_stack->config); 1594 } 1595 hci_emit_hci_open_failed(); 1596 return err; 1597 } 1598 #endif 1599 1600 return 0; 1601 } 1602 1603 static void hci_power_transition_to_initializing(void){ 1604 // set up state machine 1605 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 1606 hci_stack->hci_packet_buffer_reserved = 0; 1607 hci_stack->state = HCI_STATE_INITIALIZING; 1608 hci_stack->substate = 0; 1609 } 1610 1611 int hci_power_control(HCI_POWER_MODE power_mode){ 1612 1613 log_info("hci_power_control: %u, current mode %u", power_mode, hci_stack->state); 1614 1615 int err = 0; 1616 switch (hci_stack->state){ 1617 1618 case HCI_STATE_OFF: 1619 switch (power_mode){ 1620 case HCI_POWER_ON: 1621 err = hci_power_control_on(); 1622 if (err) { 1623 log_error("hci_power_control_on() error %u", err); 1624 return err; 1625 } 1626 hci_power_transition_to_initializing(); 1627 break; 1628 case HCI_POWER_OFF: 1629 // do nothing 1630 break; 1631 case HCI_POWER_SLEEP: 1632 // do nothing (with SLEEP == OFF) 1633 break; 1634 } 1635 break; 1636 1637 case HCI_STATE_INITIALIZING: 1638 switch (power_mode){ 1639 case HCI_POWER_ON: 1640 // do nothing 1641 break; 1642 case HCI_POWER_OFF: 1643 // no connections yet, just turn it off 1644 hci_power_control_off(); 1645 break; 1646 case HCI_POWER_SLEEP: 1647 // no connections yet, just turn it off 1648 hci_power_control_sleep(); 1649 break; 1650 } 1651 break; 1652 1653 case HCI_STATE_WORKING: 1654 switch (power_mode){ 1655 case HCI_POWER_ON: 1656 // do nothing 1657 break; 1658 case HCI_POWER_OFF: 1659 // see hci_run 1660 hci_stack->state = HCI_STATE_HALTING; 1661 break; 1662 case HCI_POWER_SLEEP: 1663 // see hci_run 1664 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 1665 hci_stack->substate = 0; 1666 break; 1667 } 1668 break; 1669 1670 case HCI_STATE_HALTING: 1671 switch (power_mode){ 1672 case HCI_POWER_ON: 1673 hci_power_transition_to_initializing(); 1674 break; 1675 case HCI_POWER_OFF: 1676 // do nothing 1677 break; 1678 case HCI_POWER_SLEEP: 1679 // see hci_run 1680 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 1681 hci_stack->substate = 0; 1682 break; 1683 } 1684 break; 1685 1686 case HCI_STATE_FALLING_ASLEEP: 1687 switch (power_mode){ 1688 case HCI_POWER_ON: 1689 1690 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1691 // nothing to do, if H4 supports power management 1692 if (bt_control_iphone_power_management_enabled()){ 1693 hci_stack->state = HCI_STATE_INITIALIZING; 1694 hci_stack->substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1695 break; 1696 } 1697 #endif 1698 hci_power_transition_to_initializing(); 1699 break; 1700 case HCI_POWER_OFF: 1701 // see hci_run 1702 hci_stack->state = HCI_STATE_HALTING; 1703 break; 1704 case HCI_POWER_SLEEP: 1705 // do nothing 1706 break; 1707 } 1708 break; 1709 1710 case HCI_STATE_SLEEPING: 1711 switch (power_mode){ 1712 case HCI_POWER_ON: 1713 1714 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1715 // nothing to do, if H4 supports power management 1716 if (bt_control_iphone_power_management_enabled()){ 1717 hci_stack->state = HCI_STATE_INITIALIZING; 1718 hci_stack->substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1719 hci_update_scan_enable(); 1720 break; 1721 } 1722 #endif 1723 err = hci_power_control_wake(); 1724 if (err) return err; 1725 hci_power_transition_to_initializing(); 1726 break; 1727 case HCI_POWER_OFF: 1728 hci_stack->state = HCI_STATE_HALTING; 1729 break; 1730 case HCI_POWER_SLEEP: 1731 // do nothing 1732 break; 1733 } 1734 break; 1735 } 1736 1737 // create internal event 1738 hci_emit_state(); 1739 1740 // trigger next/first action 1741 hci_run(); 1742 1743 return 0; 1744 } 1745 1746 static void hci_update_scan_enable(void){ 1747 // 2 = page scan, 1 = inq scan 1748 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 1749 hci_run(); 1750 } 1751 1752 void hci_discoverable_control(uint8_t enable){ 1753 if (enable) enable = 1; // normalize argument 1754 1755 if (hci_stack->discoverable == enable){ 1756 hci_emit_discoverable_enabled(hci_stack->discoverable); 1757 return; 1758 } 1759 1760 hci_stack->discoverable = enable; 1761 hci_update_scan_enable(); 1762 } 1763 1764 void hci_connectable_control(uint8_t enable){ 1765 if (enable) enable = 1; // normalize argument 1766 1767 // don't emit event 1768 if (hci_stack->connectable == enable) return; 1769 1770 hci_stack->connectable = enable; 1771 hci_update_scan_enable(); 1772 } 1773 1774 bd_addr_t * hci_local_bd_addr(void){ 1775 return &hci_stack->local_bd_addr; 1776 } 1777 1778 void hci_run(){ 1779 1780 hci_connection_t * connection; 1781 linked_item_t * it; 1782 1783 if (!hci_can_send_command_packet_now()) return; 1784 1785 // global/non-connection oriented commands 1786 1787 // decline incoming connections 1788 if (hci_stack->decline_reason){ 1789 uint8_t reason = hci_stack->decline_reason; 1790 hci_stack->decline_reason = 0; 1791 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 1792 return; 1793 } 1794 1795 // send scan enable 1796 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 1797 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1798 hci_stack->new_scan_enable_value = 0xff; 1799 return; 1800 } 1801 1802 #ifdef HAVE_BLE 1803 // handle le scan 1804 if (hci_stack->state == HCI_STATE_WORKING){ 1805 switch(hci_stack->le_scanning_state){ 1806 case LE_START_SCAN: 1807 hci_stack->le_scanning_state = LE_SCANNING; 1808 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 1809 return; 1810 1811 case LE_STOP_SCAN: 1812 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1813 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 1814 return; 1815 default: 1816 break; 1817 } 1818 if (hci_stack->le_scan_type != 0xff){ 1819 // defaults: active scanning, accept all advertisement packets 1820 int scan_type = hci_stack->le_scan_type; 1821 hci_stack->le_scan_type = 0xff; 1822 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); 1823 return; 1824 } 1825 } 1826 #endif 1827 1828 // send pending HCI commands 1829 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 1830 connection = (hci_connection_t *) it; 1831 1832 switch(connection->state){ 1833 case SEND_CREATE_CONNECTION: 1834 switch(connection->address_type){ 1835 case BD_ADDR_TYPE_CLASSIC: 1836 log_info("sending hci_create_connection"); 1837 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 1838 break; 1839 default: 1840 #ifdef HAVE_BLE 1841 log_info("sending hci_le_create_connection"); 1842 hci_send_cmd(&hci_le_create_connection, 1843 0x0060, // scan interval: 60 ms 1844 0x0030, // scan interval: 30 ms 1845 0, // don't use whitelist 1846 connection->address_type, // peer address type 1847 connection->address, // peer bd addr 1848 hci_stack->adv_addr_type, // our addr type: 1849 0x0008, // conn interval min 1850 0x0018, // conn interval max 1851 0, // conn latency 1852 0x0048, // supervision timeout 1853 0x0001, // min ce length 1854 0x0001 // max ce length 1855 ); 1856 1857 connection->state = SENT_CREATE_CONNECTION; 1858 #endif 1859 break; 1860 } 1861 return; 1862 1863 case RECEIVED_CONNECTION_REQUEST: 1864 log_info("sending hci_accept_connection_request"); 1865 connection->state = ACCEPTED_CONNECTION_REQUEST; 1866 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 1867 return; 1868 1869 #ifdef HAVE_BLE 1870 case SEND_CANCEL_CONNECTION: 1871 connection->state = SENT_CANCEL_CONNECTION; 1872 hci_send_cmd(&hci_le_create_connection_cancel); 1873 return; 1874 #endif 1875 case SEND_DISCONNECT: 1876 connection->state = SENT_DISCONNECT; 1877 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1878 return; 1879 1880 default: 1881 break; 1882 } 1883 1884 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 1885 log_info("responding to link key request"); 1886 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 1887 link_key_t link_key; 1888 link_key_type_t link_key_type; 1889 if ( hci_stack->remote_device_db 1890 && hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type) 1891 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 1892 connection->link_key_type = link_key_type; 1893 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 1894 } else { 1895 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 1896 } 1897 return; 1898 } 1899 1900 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 1901 log_info("denying to pin request"); 1902 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 1903 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 1904 return; 1905 } 1906 1907 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 1908 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 1909 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 1910 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 1911 // tweak authentication requirements 1912 uint8_t authreq = hci_stack->ssp_authentication_requirement; 1913 if (connection->bonding_flags & BONDING_DEDICATED){ 1914 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 1915 } 1916 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 1917 authreq |= 1; 1918 } 1919 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 1920 } else { 1921 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 1922 } 1923 return; 1924 } 1925 1926 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 1927 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 1928 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 1929 return; 1930 } 1931 1932 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 1933 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 1934 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 1935 return; 1936 } 1937 1938 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 1939 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 1940 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 1941 return; 1942 } 1943 1944 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 1945 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 1946 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 1947 return; 1948 } 1949 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 1950 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 1951 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 1952 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 1953 return; 1954 } 1955 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 1956 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 1957 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 1958 return; 1959 } 1960 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 1961 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 1962 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 1963 return; 1964 } 1965 1966 #ifdef HAVE_BLE 1967 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 1968 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 1969 1970 uint16_t connection_interval_min = connection->le_conn_interval_min; 1971 connection->le_conn_interval_min = 0; 1972 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 1973 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 1974 0x0000, 0xffff); 1975 } 1976 #endif 1977 } 1978 1979 // send continuation fragments 1980 if (hci_stack->acl_fragmentation_total_size > 0) { 1981 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 1982 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 1983 hci_connection_t *connection = hci_connection_for_handle(con_handle); 1984 if (connection) { 1985 hci_send_acl_packet_fragments(connection); 1986 return; 1987 } 1988 // connection gone -> discard further fragments 1989 hci_stack->acl_fragmentation_total_size = 0; 1990 hci_stack->acl_fragmentation_pos = 0; 1991 } 1992 } 1993 1994 switch (hci_stack->state){ 1995 case HCI_STATE_INITIALIZING: 1996 hci_initializing_state_machine(); 1997 break; 1998 1999 case HCI_STATE_HALTING: 2000 2001 log_info("HCI_STATE_HALTING"); 2002 // close all open connections 2003 connection = (hci_connection_t *) hci_stack->connections; 2004 if (connection){ 2005 2006 // send disconnect 2007 if (!hci_can_send_command_packet_now()) return; 2008 2009 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2010 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2011 2012 // send disconnected event right away - causes higher layer connections to get closed, too. 2013 hci_shutdown_connection(connection); 2014 return; 2015 } 2016 log_info("HCI_STATE_HALTING, calling off"); 2017 2018 // switch mode 2019 hci_power_control_off(); 2020 2021 log_info("HCI_STATE_HALTING, emitting state"); 2022 hci_emit_state(); 2023 log_info("HCI_STATE_HALTING, done"); 2024 break; 2025 2026 case HCI_STATE_FALLING_ASLEEP: 2027 switch(hci_stack->substate) { 2028 case 0: 2029 log_info("HCI_STATE_FALLING_ASLEEP"); 2030 // close all open connections 2031 connection = (hci_connection_t *) hci_stack->connections; 2032 2033 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 2034 // don't close connections, if H4 supports power management 2035 if (bt_control_iphone_power_management_enabled()){ 2036 connection = NULL; 2037 } 2038 #endif 2039 if (connection){ 2040 2041 // send disconnect 2042 if (!hci_can_send_command_packet_now()) return; 2043 2044 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2045 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2046 2047 // send disconnected event right away - causes higher layer connections to get closed, too. 2048 hci_shutdown_connection(connection); 2049 return; 2050 } 2051 2052 if (hci_classic_supported()){ 2053 // disable page and inquiry scan 2054 if (!hci_can_send_command_packet_now()) return; 2055 2056 log_info("HCI_STATE_HALTING, disabling inq scans"); 2057 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 2058 2059 // continue in next sub state 2060 hci_stack->substate++; 2061 break; 2062 } 2063 // fall through for ble-only chips 2064 2065 case 2: 2066 log_info("HCI_STATE_HALTING, calling sleep"); 2067 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 2068 // don't actually go to sleep, if H4 supports power management 2069 if (bt_control_iphone_power_management_enabled()){ 2070 // SLEEP MODE reached 2071 hci_stack->state = HCI_STATE_SLEEPING; 2072 hci_emit_state(); 2073 break; 2074 } 2075 #endif 2076 // switch mode 2077 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 2078 hci_emit_state(); 2079 break; 2080 2081 default: 2082 break; 2083 } 2084 break; 2085 2086 default: 2087 break; 2088 } 2089 } 2090 2091 int hci_send_cmd_packet(uint8_t *packet, int size){ 2092 bd_addr_t addr; 2093 hci_connection_t * conn; 2094 // house-keeping 2095 2096 // create_connection? 2097 if (IS_COMMAND(packet, hci_create_connection)){ 2098 bt_flip_addr(addr, &packet[3]); 2099 log_info("Create_connection to %s", bd_addr_to_str(addr)); 2100 2101 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 2102 if (!conn){ 2103 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2104 if (!conn){ 2105 // notify client that alloc failed 2106 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 2107 return 0; // don't sent packet to controller 2108 } 2109 conn->state = SEND_CREATE_CONNECTION; 2110 } 2111 log_info("conn state %u", conn->state); 2112 switch (conn->state){ 2113 // if connection active exists 2114 case OPEN: 2115 // and OPEN, emit connection complete command, don't send to controller 2116 hci_emit_connection_complete(conn, 0); 2117 return 0; 2118 case SEND_CREATE_CONNECTION: 2119 // connection created by hci, e.g. dedicated bonding 2120 break; 2121 default: 2122 // otherwise, just ignore as it is already in the open process 2123 return 0; 2124 } 2125 conn->state = SENT_CREATE_CONNECTION; 2126 } 2127 2128 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 2129 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 2130 } 2131 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 2132 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 2133 } 2134 2135 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 2136 if (hci_stack->remote_device_db){ 2137 bt_flip_addr(addr, &packet[3]); 2138 hci_stack->remote_device_db->delete_link_key(&addr); 2139 } 2140 } 2141 2142 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 2143 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 2144 bt_flip_addr(addr, &packet[3]); 2145 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 2146 if (conn){ 2147 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 2148 } 2149 } 2150 2151 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 2152 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 2153 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 2154 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 2155 bt_flip_addr(addr, &packet[3]); 2156 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 2157 if (conn){ 2158 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 2159 } 2160 } 2161 2162 #ifdef HAVE_BLE 2163 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 2164 hci_stack->adv_addr_type = packet[8]; 2165 } 2166 if (IS_COMMAND(packet, hci_le_set_random_address)){ 2167 bt_flip_addr(hci_stack->adv_address, &packet[3]); 2168 } 2169 #endif 2170 2171 hci_stack->num_cmd_packets--; 2172 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2173 2174 // free packet buffer for synchronous transport implementations 2175 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 2176 hci_stack->hci_packet_buffer_reserved = 0; 2177 } 2178 2179 return err; 2180 } 2181 2182 // disconnect because of security block 2183 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 2184 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2185 if (!connection) return; 2186 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2187 } 2188 2189 2190 // Configure Secure Simple Pairing 2191 2192 // enable will enable SSP during init 2193 void hci_ssp_set_enable(int enable){ 2194 hci_stack->ssp_enable = enable; 2195 } 2196 2197 int hci_local_ssp_activated(){ 2198 return hci_ssp_supported() && hci_stack->ssp_enable; 2199 } 2200 2201 // if set, BTstack will respond to io capability request using authentication requirement 2202 void hci_ssp_set_io_capability(int io_capability){ 2203 hci_stack->ssp_io_capability = io_capability; 2204 } 2205 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 2206 hci_stack->ssp_authentication_requirement = authentication_requirement; 2207 } 2208 2209 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 2210 void hci_ssp_set_auto_accept(int auto_accept){ 2211 hci_stack->ssp_auto_accept = auto_accept; 2212 } 2213 2214 /** 2215 * pre: numcmds >= 0 - it's allowed to send a command to the controller 2216 */ 2217 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 2218 2219 if (!hci_can_send_command_packet_now()){ 2220 log_error("hci_send_cmd called but cannot send packet now"); 2221 return 0; 2222 } 2223 2224 // for HCI INITIALIZATION 2225 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 2226 hci_stack->last_cmd_opcode = cmd->opcode; 2227 2228 hci_reserve_packet_buffer(); 2229 uint8_t * packet = hci_stack->hci_packet_buffer; 2230 2231 va_list argptr; 2232 va_start(argptr, cmd); 2233 uint16_t size = hci_create_cmd_internal(packet, cmd, argptr); 2234 va_end(argptr); 2235 2236 return hci_send_cmd_packet(packet, size); 2237 } 2238 2239 // Create various non-HCI events. 2240 // TODO: generalize, use table similar to hci_create_command 2241 2242 void hci_emit_state(){ 2243 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 2244 uint8_t event[3]; 2245 event[0] = BTSTACK_EVENT_STATE; 2246 event[1] = sizeof(event) - 2; 2247 event[2] = hci_stack->state; 2248 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2249 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2250 } 2251 2252 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 2253 uint8_t event[13]; 2254 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 2255 event[1] = sizeof(event) - 2; 2256 event[2] = status; 2257 bt_store_16(event, 3, conn->con_handle); 2258 bt_flip_addr(&event[5], conn->address); 2259 event[11] = 1; // ACL connection 2260 event[12] = 0; // encryption disabled 2261 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2262 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2263 } 2264 2265 void hci_emit_le_connection_complete(hci_connection_t *conn, uint8_t status){ 2266 uint8_t event[21]; 2267 event[0] = HCI_EVENT_LE_META; 2268 event[1] = sizeof(event) - 2; 2269 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 2270 event[3] = status; 2271 bt_store_16(event, 4, conn->con_handle); 2272 event[6] = 0; // TODO: role 2273 event[7] = conn->address_type; 2274 bt_flip_addr(&event[8], conn->address); 2275 bt_store_16(event, 14, 0); // interval 2276 bt_store_16(event, 16, 0); // latency 2277 bt_store_16(event, 18, 0); // supervision timeout 2278 event[20] = 0; // master clock accuracy 2279 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2280 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2281 } 2282 2283 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 2284 uint8_t event[6]; 2285 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 2286 event[1] = sizeof(event) - 2; 2287 event[2] = 0; // status = OK 2288 bt_store_16(event, 3, handle); 2289 event[5] = reason; 2290 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2291 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2292 } 2293 2294 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 2295 if (disable_l2cap_timeouts) return; 2296 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 2297 uint8_t event[4]; 2298 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 2299 event[1] = sizeof(event) - 2; 2300 bt_store_16(event, 2, conn->con_handle); 2301 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2302 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2303 } 2304 2305 void hci_emit_nr_connections_changed(){ 2306 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 2307 uint8_t event[3]; 2308 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 2309 event[1] = sizeof(event) - 2; 2310 event[2] = nr_hci_connections(); 2311 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2312 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2313 } 2314 2315 void hci_emit_hci_open_failed(){ 2316 log_info("BTSTACK_EVENT_POWERON_FAILED"); 2317 uint8_t event[2]; 2318 event[0] = BTSTACK_EVENT_POWERON_FAILED; 2319 event[1] = sizeof(event) - 2; 2320 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2321 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2322 } 2323 2324 #ifndef EMBEDDED 2325 void hci_emit_btstack_version() { 2326 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 2327 uint8_t event[6]; 2328 event[0] = BTSTACK_EVENT_VERSION; 2329 event[1] = sizeof(event) - 2; 2330 event[2] = BTSTACK_MAJOR; 2331 event[3] = BTSTACK_MINOR; 2332 bt_store_16(event, 4, BTSTACK_REVISION); 2333 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2334 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2335 } 2336 #endif 2337 2338 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 2339 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 2340 uint8_t event[3]; 2341 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 2342 event[1] = sizeof(event) - 2; 2343 event[2] = enabled; 2344 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2345 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2346 } 2347 2348 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 2349 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 2350 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 2351 event[1] = sizeof(event) - 2 - 1; 2352 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 2353 bt_flip_addr(&event[3], *addr); 2354 memcpy(&event[9], name, 248); 2355 2356 event[9+248] = 0; // assert \0 for log_info 2357 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(*addr), &event[9]); 2358 2359 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 2360 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 2361 } 2362 2363 void hci_emit_discoverable_enabled(uint8_t enabled){ 2364 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 2365 uint8_t event[3]; 2366 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 2367 event[1] = sizeof(event) - 2; 2368 event[2] = enabled; 2369 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2370 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2371 } 2372 2373 void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 2374 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 2375 uint8_t event[5]; 2376 int pos = 0; 2377 event[pos++] = GAP_SECURITY_LEVEL; 2378 event[pos++] = sizeof(event) - 2; 2379 bt_store_16(event, 2, con_handle); 2380 pos += 2; 2381 event[pos++] = level; 2382 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2383 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2384 } 2385 2386 void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 2387 log_info("hci_emit_dedicated_bonding_result %u ", status); 2388 uint8_t event[9]; 2389 int pos = 0; 2390 event[pos++] = GAP_DEDICATED_BONDING_COMPLETED; 2391 event[pos++] = sizeof(event) - 2; 2392 event[pos++] = status; 2393 bt_flip_addr( * (bd_addr_t *) &event[pos], address); 2394 pos += 6; 2395 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2396 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2397 } 2398 2399 // query if remote side supports SSP 2400 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 2401 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2402 if (!connection) return 0; 2403 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 2404 } 2405 2406 int hci_ssp_supported_on_both_sides(hci_con_handle_t handle){ 2407 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 2408 } 2409 2410 // GAP API 2411 /** 2412 * @bbrief enable/disable bonding. default is enabled 2413 * @praram enabled 2414 */ 2415 void gap_set_bondable_mode(int enable){ 2416 hci_stack->bondable = enable ? 1 : 0; 2417 } 2418 2419 /** 2420 * @brief map link keys to security levels 2421 */ 2422 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 2423 switch (link_key_type){ 2424 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 2425 return LEVEL_4; 2426 case COMBINATION_KEY: 2427 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 2428 return LEVEL_3; 2429 default: 2430 return LEVEL_2; 2431 } 2432 } 2433 2434 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 2435 if (!connection) return LEVEL_0; 2436 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 2437 return gap_security_level_for_link_key_type(connection->link_key_type); 2438 } 2439 2440 2441 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 2442 log_info("gap_mitm_protection_required_for_security_level %u", level); 2443 return level > LEVEL_2; 2444 } 2445 2446 /** 2447 * @brief get current security level 2448 */ 2449 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 2450 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2451 if (!connection) return LEVEL_0; 2452 return gap_security_level_for_connection(connection); 2453 } 2454 2455 /** 2456 * @brief request connection to device to 2457 * @result GAP_AUTHENTICATION_RESULT 2458 */ 2459 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 2460 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2461 if (!connection){ 2462 hci_emit_security_level(con_handle, LEVEL_0); 2463 return; 2464 } 2465 gap_security_level_t current_level = gap_security_level(con_handle); 2466 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 2467 if (current_level >= requested_level){ 2468 hci_emit_security_level(con_handle, current_level); 2469 return; 2470 } 2471 2472 connection->requested_security_level = requested_level; 2473 2474 // would enabling ecnryption suffice (>= LEVEL_2)? 2475 if (hci_stack->remote_device_db){ 2476 link_key_type_t link_key_type; 2477 link_key_t link_key; 2478 if (hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 2479 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 2480 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2481 return; 2482 } 2483 } 2484 } 2485 2486 // try to authenticate connection 2487 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2488 hci_run(); 2489 } 2490 2491 /** 2492 * @brief start dedicated bonding with device. disconnect after bonding 2493 * @param device 2494 * @param request MITM protection 2495 * @result GAP_DEDICATED_BONDING_COMPLETE 2496 */ 2497 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 2498 2499 // create connection state machine 2500 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 2501 2502 if (!connection){ 2503 return BTSTACK_MEMORY_ALLOC_FAILED; 2504 } 2505 2506 // delete linkn key 2507 hci_drop_link_key_for_bd_addr( (bd_addr_t *) &device); 2508 2509 // configure LEVEL_2/3, dedicated bonding 2510 connection->state = SEND_CREATE_CONNECTION; 2511 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 2512 log_info("gap_dedicated_bonding, mitm %u -> level %u", mitm_protection_required, connection->requested_security_level); 2513 connection->bonding_flags = BONDING_DEDICATED; 2514 2515 // wait for GAP Security Result and send GAP Dedicated Bonding complete 2516 2517 // handle: connnection failure (connection complete != ok) 2518 // handle: authentication failure 2519 // handle: disconnect on done 2520 2521 hci_run(); 2522 2523 return 0; 2524 } 2525 2526 void gap_set_local_name(const char * local_name){ 2527 hci_stack->local_name = local_name; 2528 } 2529 2530 le_command_status_t le_central_start_scan(){ 2531 if (hci_stack->le_scanning_state == LE_SCANNING) return BLE_PERIPHERAL_OK; 2532 hci_stack->le_scanning_state = LE_START_SCAN; 2533 hci_run(); 2534 return BLE_PERIPHERAL_OK; 2535 } 2536 2537 le_command_status_t le_central_stop_scan(){ 2538 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return BLE_PERIPHERAL_OK; 2539 hci_stack->le_scanning_state = LE_STOP_SCAN; 2540 hci_run(); 2541 return BLE_PERIPHERAL_OK; 2542 } 2543 2544 void le_central_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 2545 hci_stack->le_scan_type = scan_type; 2546 hci_stack->le_scan_interval = scan_interval; 2547 hci_stack->le_scan_window = scan_window; 2548 hci_run(); 2549 } 2550 2551 le_command_status_t le_central_connect(bd_addr_t * addr, bd_addr_type_t addr_type){ 2552 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2553 if (!conn){ 2554 log_info("le_central_connect: no connection exists yet, creating context"); 2555 conn = create_connection_for_bd_addr_and_type(*addr, addr_type); 2556 if (!conn){ 2557 // notify client that alloc failed 2558 hci_emit_le_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 2559 log_info("le_central_connect: failed to alloc context"); 2560 return BLE_PERIPHERAL_NOT_CONNECTED; // don't sent packet to controller 2561 } 2562 conn->state = SEND_CREATE_CONNECTION; 2563 log_info("le_central_connect: send create connection next"); 2564 hci_run(); 2565 return BLE_PERIPHERAL_OK; 2566 } 2567 2568 if (!hci_is_le_connection(conn) || 2569 conn->state == SEND_CREATE_CONNECTION || 2570 conn->state == SENT_CREATE_CONNECTION) { 2571 hci_emit_le_connection_complete(conn, ERROR_CODE_COMMAND_DISALLOWED); 2572 log_error("le_central_connect: classic connection or connect is already being created"); 2573 return BLE_PERIPHERAL_IN_WRONG_STATE; 2574 } 2575 2576 log_info("le_central_connect: context exists with state %u", conn->state); 2577 hci_emit_le_connection_complete(conn, 0); 2578 hci_run(); 2579 return BLE_PERIPHERAL_OK; 2580 } 2581 2582 // @assumption: only a single outgoing LE Connection exists 2583 static hci_connection_t * le_central_get_outgoing_connection(){ 2584 linked_item_t *it; 2585 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 2586 hci_connection_t * conn = (hci_connection_t *) it; 2587 if (!hci_is_le_connection(conn)) continue; 2588 switch (conn->state){ 2589 case SEND_CREATE_CONNECTION: 2590 case SENT_CREATE_CONNECTION: 2591 return conn; 2592 default: 2593 break; 2594 }; 2595 } 2596 return NULL; 2597 } 2598 2599 le_command_status_t le_central_connect_cancel(){ 2600 hci_connection_t * conn = le_central_get_outgoing_connection(); 2601 switch (conn->state){ 2602 case SEND_CREATE_CONNECTION: 2603 // skip sending create connection and emit event instead 2604 hci_emit_le_connection_complete(conn, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 2605 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 2606 btstack_memory_hci_connection_free( conn ); 2607 break; 2608 case SENT_CREATE_CONNECTION: 2609 // request to send cancel connection 2610 conn->state = SEND_CANCEL_CONNECTION; 2611 hci_run(); 2612 break; 2613 default: 2614 break; 2615 } 2616 return BLE_PERIPHERAL_OK; 2617 } 2618 2619 /** 2620 * @brief Updates the connection parameters for a given LE connection 2621 * @param handle 2622 * @param conn_interval_min (unit: 1.25ms) 2623 * @param conn_interval_max (unit: 1.25ms) 2624 * @param conn_latency 2625 * @param supervision_timeout (unit: 10ms) 2626 * @returns 0 if ok 2627 */ 2628 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 2629 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 2630 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2631 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2632 connection->le_conn_interval_min = conn_interval_min; 2633 connection->le_conn_interval_max = conn_interval_max; 2634 connection->le_conn_latency = conn_latency; 2635 connection->le_supervision_timeout = supervision_timeout; 2636 return 0; 2637 } 2638 2639 le_command_status_t gap_disconnect(hci_con_handle_t handle){ 2640 hci_connection_t * conn = hci_connection_for_handle(handle); 2641 if (!conn){ 2642 hci_emit_disconnection_complete(handle, 0); 2643 return BLE_PERIPHERAL_OK; 2644 } 2645 conn->state = SEND_DISCONNECT; 2646 hci_run(); 2647 return BLE_PERIPHERAL_OK; 2648 } 2649 2650 void hci_disconnect_all(){ 2651 linked_list_iterator_t it; 2652 linked_list_iterator_init(&it, &hci_stack->connections); 2653 while (linked_list_iterator_has_next(&it)){ 2654 hci_connection_t * con = (hci_connection_t*) linked_list_iterator_next(&it); 2655 if (con->state == SENT_DISCONNECT) continue; 2656 con->state = SEND_DISCONNECT; 2657 } 2658 hci_run(); 2659 } 2660