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