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 "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 77 // the STACK is here 78 #ifndef HAVE_MALLOC 79 static hci_stack_t hci_stack_static; 80 #endif 81 static hci_stack_t * hci_stack = NULL; 82 83 // test helper 84 static uint8_t disable_l2cap_timeouts = 0; 85 86 /** 87 * create connection for given address 88 * 89 * @return connection OR NULL, if no memory left 90 */ 91 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 92 93 printf("create_connection_for_addr %s\n", bd_addr_to_str(addr)); 94 hci_connection_t * conn = (hci_connection_t *) btstack_memory_hci_connection_get(); 95 if (!conn) return NULL; 96 BD_ADDR_COPY(conn->address, addr); 97 conn->address_type = addr_type; 98 conn->con_handle = 0xffff; 99 conn->authentication_flags = AUTH_FLAGS_NONE; 100 conn->bonding_flags = 0; 101 conn->requested_security_level = LEVEL_0; 102 linked_item_set_user(&conn->timeout.item, conn); 103 conn->timeout.process = hci_connection_timeout_handler; 104 hci_connection_timestamp(conn); 105 conn->acl_recombination_length = 0; 106 conn->acl_recombination_pos = 0; 107 conn->num_acl_packets_sent = 0; 108 linked_list_add(&hci_stack->connections, (linked_item_t *) conn); 109 return conn; 110 } 111 112 /** 113 * get connection for a given handle 114 * 115 * @return connection OR NULL, if not found 116 */ 117 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 118 linked_item_t *it; 119 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 120 if ( ((hci_connection_t *) it)->con_handle == con_handle){ 121 return (hci_connection_t *) it; 122 } 123 } 124 return NULL; 125 } 126 127 /** 128 * get connection for given address 129 * 130 * @return connection OR NULL, if not found 131 */ 132 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t * addr, bd_addr_type_t addr_type){ 133 linked_item_t *it; 134 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 135 hci_connection_t * connection = (hci_connection_t *) it; 136 if (connection->address_type != addr_type) continue; 137 if (memcmp(addr, connection->address, 6) != 0) continue; 138 return connection; 139 } 140 return NULL; 141 } 142 143 static void hci_connection_timeout_handler(timer_source_t *timer){ 144 hci_connection_t * connection = (hci_connection_t *) linked_item_get_user(&timer->item); 145 #ifdef HAVE_TIME 146 struct timeval tv; 147 gettimeofday(&tv, NULL); 148 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 149 // connections might be timed out 150 hci_emit_l2cap_check_timeout(connection); 151 } 152 #endif 153 #ifdef HAVE_TICK 154 if (embedded_get_ticks() > connection->timestamp + embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 155 // connections might be timed out 156 hci_emit_l2cap_check_timeout(connection); 157 } 158 #endif 159 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 160 run_loop_add_timer(timer); 161 } 162 163 static void hci_connection_timestamp(hci_connection_t *connection){ 164 #ifdef HAVE_TIME 165 gettimeofday(&connection->timestamp, NULL); 166 #endif 167 #ifdef HAVE_TICK 168 connection->timestamp = embedded_get_ticks(); 169 #endif 170 } 171 172 173 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 174 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 175 } 176 177 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 178 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 179 } 180 181 182 /** 183 * add authentication flags and reset timer 184 * @note: assumes classic connection 185 */ 186 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 187 bd_addr_t addr; 188 bt_flip_addr(addr, *(bd_addr_t *) bd_addr); 189 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 190 if (conn) { 191 connectionSetAuthenticationFlags(conn, flags); 192 hci_connection_timestamp(conn); 193 } 194 } 195 196 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 197 hci_connection_t * conn = hci_connection_for_handle(handle); 198 if (!conn) return 0; 199 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 200 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 201 return 0; 202 } 203 204 void hci_drop_link_key_for_bd_addr(bd_addr_t *addr){ 205 if (hci_stack->remote_device_db) { 206 hci_stack->remote_device_db->delete_link_key(addr); 207 } 208 } 209 210 int hci_is_le_connection(hci_connection_t * connection){ 211 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 212 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 213 } 214 215 216 /** 217 * count connections 218 */ 219 static int nr_hci_connections(void){ 220 int count = 0; 221 linked_item_t *it; 222 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 223 return count; 224 } 225 226 /** 227 * Dummy handler called by HCI 228 */ 229 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 230 } 231 232 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 233 hci_connection_t * connection = hci_connection_for_handle(handle); 234 if (!connection) { 235 log_error("hci_number_outgoing_packets connectino for handle %u does not exist!\n", handle); 236 return 0; 237 } 238 return connection->num_acl_packets_sent; 239 } 240 241 uint8_t hci_number_free_acl_slots(){ 242 uint8_t free_slots = hci_stack->total_num_acl_packets; 243 linked_item_t *it; 244 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 245 hci_connection_t * connection = (hci_connection_t *) it; 246 if (free_slots < connection->num_acl_packets_sent) { 247 log_error("hci_number_free_acl_slots: sum of outgoing packets > total acl packets!\n"); 248 return 0; 249 } 250 free_slots -= connection->num_acl_packets_sent; 251 } 252 return free_slots; 253 } 254 255 int hci_can_send_packet_now(uint8_t packet_type){ 256 257 // check for async hci transport implementations 258 if (hci_stack->hci_transport->can_send_packet_now){ 259 if (!hci_stack->hci_transport->can_send_packet_now(packet_type)){ 260 return 0; 261 } 262 } 263 264 // check regular Bluetooth flow control 265 switch (packet_type) { 266 case HCI_ACL_DATA_PACKET: 267 return hci_number_free_acl_slots(); 268 case HCI_COMMAND_DATA_PACKET: 269 return hci_stack->num_cmd_packets; 270 default: 271 return 0; 272 } 273 } 274 275 // same as hci_can_send_packet_now, but also checks if packet buffer is free for use 276 int hci_can_send_packet_now_using_packet_buffer(uint8_t packet_type){ 277 if (hci_stack->hci_packet_buffer_reserved) return 0; 278 return hci_can_send_packet_now(packet_type); 279 } 280 281 // used for internal checks in l2cap[-le].c 282 int hci_is_packet_buffer_reserved(void){ 283 return hci_stack->hci_packet_buffer_reserved; 284 } 285 286 // reserves outgoing packet buffer. @returns 1 if successful 287 int hci_reserve_packet_buffer(void){ 288 if (hci_stack->hci_packet_buffer_reserved) return 0; 289 hci_stack->hci_packet_buffer_reserved = 1; 290 return 1; 291 } 292 293 void hci_release_packet_buffer(void){ 294 hci_stack->hci_packet_buffer_reserved = 0; 295 } 296 297 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 298 int hci_transport_synchronous(void){ 299 return hci_stack->hci_transport->can_send_packet_now == NULL; 300 } 301 302 int hci_send_acl_packet(uint8_t *packet, int size){ 303 304 // check for free places on BT module 305 if (!hci_number_free_acl_slots()) return BTSTACK_ACL_BUFFERS_FULL; 306 307 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 308 hci_connection_t *connection = hci_connection_for_handle( con_handle); 309 if (!connection) return 0; 310 hci_connection_timestamp(connection); 311 312 // count packet 313 connection->num_acl_packets_sent++; 314 // log_info("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 315 316 // send packet 317 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 318 319 // free packet buffer for synchronous transport implementations 320 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 321 hci_stack->hci_packet_buffer_reserved = 0; 322 } 323 324 return err; 325 } 326 327 static void acl_handler(uint8_t *packet, int size){ 328 329 // log_info("acl_handler: size %u", size); 330 331 // get info 332 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 333 hci_connection_t *conn = hci_connection_for_handle(con_handle); 334 uint8_t acl_flags = READ_ACL_FLAGS(packet); 335 uint16_t acl_length = READ_ACL_LENGTH(packet); 336 337 // ignore non-registered handle 338 if (!conn){ 339 log_error( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 340 return; 341 } 342 343 // assert packet is complete 344 if (acl_length + 4 != size){ 345 log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4); 346 return; 347 } 348 349 // update idle timestamp 350 hci_connection_timestamp(conn); 351 352 // handle different packet types 353 switch (acl_flags & 0x03) { 354 355 case 0x01: // continuation fragment 356 357 // sanity check 358 if (conn->acl_recombination_pos == 0) { 359 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 360 return; 361 } 362 363 // append fragment payload (header already stored) 364 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 365 conn->acl_recombination_pos += acl_length; 366 367 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", acl_length, 368 // conn->acl_recombination_pos, conn->acl_recombination_length); 369 370 // forward complete L2CAP packet if complete. 371 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 372 373 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 374 // reset recombination buffer 375 conn->acl_recombination_length = 0; 376 conn->acl_recombination_pos = 0; 377 } 378 break; 379 380 case 0x02: { // first fragment 381 382 // sanity check 383 if (conn->acl_recombination_pos) { 384 log_error( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 385 return; 386 } 387 388 // peek into L2CAP packet! 389 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 390 391 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 392 393 // compare fragment size to L2CAP packet size 394 if (acl_length >= l2cap_length + 4){ 395 396 // forward fragment as L2CAP packet 397 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 398 399 } else { 400 // store first fragment and tweak acl length for complete package 401 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 402 conn->acl_recombination_pos = acl_length + 4; 403 conn->acl_recombination_length = l2cap_length; 404 bt_store_16(conn->acl_recombination_buffer, 2, l2cap_length +4); 405 } 406 break; 407 408 } 409 default: 410 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 411 return; 412 } 413 414 // execute main loop 415 hci_run(); 416 } 417 418 static void hci_shutdown_connection(hci_connection_t *conn){ 419 log_info("Connection closed: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 420 421 run_loop_remove_timer(&conn->timeout); 422 423 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 424 btstack_memory_hci_connection_free( conn ); 425 426 // now it's gone 427 hci_emit_nr_connections_changed(); 428 } 429 430 static const uint16_t packet_type_sizes[] = { 431 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 432 HCI_ACL_DH1_SIZE, 0, 0, 0, 433 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 434 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 435 }; 436 static const uint8_t packet_type_feature_requirement_bit[] = { 437 0, // 3 slot packets 438 1, // 5 slot packets 439 25, // EDR 2 mpbs 440 26, // EDR 3 mbps 441 39, // 3 slot EDR packts 442 40, // 5 slot EDR packet 443 }; 444 static const uint16_t packet_type_feature_packet_mask[] = { 445 0x0f00, // 3 slot packets 446 0xf000, // 5 slot packets 447 0x1102, // EDR 2 mpbs 448 0x2204, // EDR 3 mbps 449 0x0300, // 3 slot EDR packts 450 0x3000, // 5 slot EDR packet 451 }; 452 453 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 454 // enable packet types based on size 455 uint16_t packet_types = 0; 456 int i; 457 for (i=0;i<16;i++){ 458 if (packet_type_sizes[i] == 0) continue; 459 if (packet_type_sizes[i] <= buffer_size){ 460 packet_types |= 1 << i; 461 } 462 } 463 // disable packet types due to missing local supported features 464 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 465 int bit_idx = packet_type_feature_requirement_bit[i]; 466 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 467 if (feature_set) continue; 468 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 469 packet_types &= ~packet_type_feature_packet_mask[i]; 470 } 471 // flip bits for "may not be used" 472 packet_types ^= 0x3306; 473 return packet_types; 474 } 475 476 uint16_t hci_usable_acl_packet_types(void){ 477 return hci_stack->packet_types; 478 } 479 480 uint8_t* hci_get_outgoing_packet_buffer(void){ 481 // hci packet buffer is >= acl data packet length 482 return hci_stack->hci_packet_buffer; 483 } 484 485 uint16_t hci_max_acl_data_packet_length(void){ 486 return hci_stack->acl_data_packet_length; 487 } 488 489 int hci_non_flushable_packet_boundary_flag_supported(void){ 490 // No. 54, byte 6, bit 6 491 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 492 } 493 494 int hci_ssp_supported(void){ 495 // No. 51, byte 6, bit 3 496 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 497 } 498 499 int hci_classic_supported(void){ 500 // No. 37, byte 4, bit 5, = No BR/EDR Support 501 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 502 } 503 504 int hci_le_supported(void){ 505 #ifdef HAVE_BLE 506 // No. 37, byte 4, bit 6 = LE Supported (Controller) 507 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 508 #else 509 return 0; 510 #endif 511 } 512 513 // get addr type and address used in advertisement packets 514 void hci_le_advertisement_address(uint8_t * addr_type, bd_addr_t * addr){ 515 *addr_type = hci_stack->adv_addr_type; 516 if (hci_stack->adv_addr_type){ 517 memcpy(addr, hci_stack->adv_address, 6); 518 } else { 519 memcpy(addr, hci_stack->local_bd_addr, 6); 520 } 521 } 522 523 #ifdef HAVE_BLE 524 static void le_handle_advertisement_report(uint8_t *packet, int size){ 525 int num_reports = packet[3]; 526 int i; 527 int total_data_length = 0; 528 int data_offset = 0; 529 530 for (i=0; i<num_reports;i++){ 531 total_data_length += packet[4+num_reports*8+i]; 532 } 533 534 for (i=0; i<num_reports;i++){ 535 int pos = 0; 536 uint8_t data_length = packet[4+num_reports*8+i]; 537 uint8_t event_size = 10 + data_length; 538 uint8_t event[2 + event_size ]; 539 event[pos++] = GAP_LE_ADVERTISING_REPORT; 540 event[pos++] = event_size; 541 event[pos++] = packet[4+i]; // event_type; 542 event[pos++] = packet[4+num_reports+i]; // address_type; 543 memcpy(&event[pos], &packet[4+num_reports*2+i*6], 6); // bt address 544 pos += 6; 545 event[pos++] = packet[4+num_reports*9+total_data_length + i]; 546 event[pos++] = data_length; 547 memcpy(&event[pos], &packet[4+num_reports*9+data_offset], data_length); 548 data_offset += data_length; 549 pos += data_length; 550 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 551 } 552 } 553 #endif 554 555 // avoid huge local variables 556 #ifndef EMBEDDED 557 static device_name_t device_name; 558 #endif 559 static void event_handler(uint8_t *packet, int size){ 560 561 uint16_t event_length = packet[1]; 562 563 // assert packet is complete 564 if (size != event_length + 2){ 565 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 566 return; 567 } 568 569 bd_addr_t addr; 570 bd_addr_type_t addr_type; 571 uint8_t link_type; 572 hci_con_handle_t handle; 573 hci_connection_t * conn; 574 int i; 575 576 // printf("HCI:EVENT:%02x\n", packet[0]); 577 578 switch (packet[0]) { 579 580 case HCI_EVENT_COMMAND_COMPLETE: 581 // get num cmd packets 582 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack->num_cmd_packets, packet[2]); 583 hci_stack->num_cmd_packets = packet[2]; 584 585 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 586 // from offset 5 587 // status 588 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 589 hci_stack->acl_data_packet_length = READ_BT_16(packet, 6); 590 // ignore: SCO data packet len (8) 591 hci_stack->total_num_acl_packets = packet[9]; 592 // ignore: total num SCO packets 593 if (hci_stack->state == HCI_STATE_INITIALIZING){ 594 // determine usable ACL payload size 595 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 596 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 597 } 598 log_info("hci_read_buffer_size: used size %u, count %u\n", 599 hci_stack->acl_data_packet_length, hci_stack->total_num_acl_packets); 600 } 601 } 602 #ifdef HAVE_BLE 603 if (COMMAND_COMPLETE_EVENT(packet, hci_le_read_buffer_size)){ 604 hci_stack->le_data_packet_length = READ_BT_16(packet, 6); 605 hci_stack->total_num_le_packets = packet[8]; 606 log_info("hci_le_read_buffer_size: size %u, count %u\n", hci_stack->le_data_packet_length, hci_stack->total_num_le_packets); 607 608 // use LE buffers if no clasic buffers have been reported 609 if (hci_stack->total_num_acl_packets == 0){ 610 log_info("use le buffers instead of classic ones"); 611 hci_stack->total_num_acl_packets = hci_stack->total_num_le_packets; 612 hci_stack->acl_data_packet_length = hci_stack->le_data_packet_length; 613 // determine usable ACL payload size 614 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 615 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 616 } 617 } 618 } 619 #endif 620 // Dump local address 621 if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)) { 622 bt_flip_addr(hci_stack->local_bd_addr, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1]); 623 log_info("Local Address, Status: 0x%02x: Addr: %s\n", 624 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 625 } 626 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 627 hci_emit_discoverable_enabled(hci_stack->discoverable); 628 } 629 // Note: HCI init checks 630 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_features)){ 631 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 632 log_info("Local Supported Features: 0x%02x%02x%02x%02x%02x%02x%02x%02x", 633 hci_stack->local_supported_features[0], hci_stack->local_supported_features[1], 634 hci_stack->local_supported_features[2], hci_stack->local_supported_features[3], 635 hci_stack->local_supported_features[4], hci_stack->local_supported_features[5], 636 hci_stack->local_supported_features[6], hci_stack->local_supported_features[7]); 637 638 // determine usable ACL packet types based buffer size and supported features 639 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]); 640 log_info("packet types %04x", hci_stack->packet_types); 641 642 // Classic/LE 643 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 644 } 645 break; 646 647 case HCI_EVENT_COMMAND_STATUS: 648 // get num cmd packets 649 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack->num_cmd_packets, packet[3]); 650 hci_stack->num_cmd_packets = packet[3]; 651 break; 652 653 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 654 for (i=0; i<packet[2];i++){ 655 handle = READ_BT_16(packet, 3 + 2*i); 656 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 657 conn = hci_connection_for_handle(handle); 658 if (!conn){ 659 log_error("hci_number_completed_packet lists unused con handle %u\n", handle); 660 continue; 661 } 662 conn->num_acl_packets_sent -= num_packets; 663 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 664 } 665 break; 666 667 case HCI_EVENT_CONNECTION_REQUEST: 668 bt_flip_addr(addr, &packet[2]); 669 // TODO: eval COD 8-10 670 link_type = packet[11]; 671 log_info("Connection_incoming: %s, type %u\n", bd_addr_to_str(addr), link_type); 672 if (link_type == 1) { // ACL 673 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 674 if (!conn) { 675 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 676 } 677 if (!conn) { 678 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 679 hci_stack->decline_reason = 0x0d; 680 BD_ADDR_COPY(hci_stack->decline_addr, addr); 681 break; 682 } 683 conn->state = RECEIVED_CONNECTION_REQUEST; 684 hci_run(); 685 } else { 686 // SYNCHRONOUS CONNECTION LIMIT TO A DEVICE EXCEEDED (0X0A) 687 hci_stack->decline_reason = 0x0a; 688 BD_ADDR_COPY(hci_stack->decline_addr, addr); 689 } 690 break; 691 692 case HCI_EVENT_CONNECTION_COMPLETE: 693 // Connection management 694 bt_flip_addr(addr, &packet[5]); 695 log_info("Connection_complete (status=%u) %s\n", packet[2], bd_addr_to_str(addr)); 696 addr_type = BD_ADDR_TYPE_CLASSIC; 697 conn = hci_connection_for_bd_addr_and_type(&addr, addr_type); 698 if (conn) { 699 if (!packet[2]){ 700 conn->state = OPEN; 701 conn->con_handle = READ_BT_16(packet, 3); 702 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 703 704 // restart timer 705 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 706 run_loop_add_timer(&conn->timeout); 707 708 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 709 710 hci_emit_nr_connections_changed(); 711 } else { 712 // notify client if dedicated bonding 713 if (conn->bonding_flags & BONDING_DEDICATED){ 714 hci_emit_dedicated_bonding_result(conn, packet[2]); 715 } 716 717 // connection failed, remove entry 718 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 719 btstack_memory_hci_connection_free( conn ); 720 721 // if authentication error, also delete link key 722 if (packet[2] == 0x05) { 723 hci_drop_link_key_for_bd_addr(&addr); 724 } 725 } 726 } 727 break; 728 729 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 730 handle = READ_BT_16(packet, 3); 731 conn = hci_connection_for_handle(handle); 732 if (!conn) break; 733 if (!packet[2]){ 734 uint8_t * features = &packet[5]; 735 if (features[6] & (1 << 3)){ 736 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 737 } 738 } 739 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 740 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x", conn->bonding_flags); 741 if (conn->bonding_flags & BONDING_DEDICATED){ 742 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 743 } 744 break; 745 746 case HCI_EVENT_LINK_KEY_REQUEST: 747 log_info("HCI_EVENT_LINK_KEY_REQUEST\n"); 748 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 749 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 750 if (hci_stack->bondable && !hci_stack->remote_device_db) break; 751 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 752 hci_run(); 753 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 754 return; 755 756 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 757 bt_flip_addr(addr, &packet[2]); 758 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 759 if (!conn) break; 760 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 761 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 762 // Change Connection Encryption keeps link key type 763 if (link_key_type != CHANGED_COMBINATION_KEY){ 764 conn->link_key_type = link_key_type; 765 } 766 if (!hci_stack->remote_device_db) break; 767 hci_stack->remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8], conn->link_key_type); 768 // still forward event to allow dismiss of pairing dialog 769 break; 770 } 771 772 case HCI_EVENT_PIN_CODE_REQUEST: 773 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 774 // non-bondable mode: pin code negative reply will be sent 775 if (!hci_stack->bondable){ 776 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 777 hci_run(); 778 return; 779 } 780 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 781 if (!hci_stack->remote_device_db) break; 782 bt_flip_addr(addr, &packet[2]); 783 hci_stack->remote_device_db->delete_link_key(&addr); 784 break; 785 786 case HCI_EVENT_IO_CAPABILITY_REQUEST: 787 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 788 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 789 break; 790 791 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 792 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 793 if (!hci_stack->ssp_auto_accept) break; 794 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 795 break; 796 797 case HCI_EVENT_USER_PASSKEY_REQUEST: 798 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 799 if (!hci_stack->ssp_auto_accept) break; 800 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 801 break; 802 803 case HCI_EVENT_ENCRYPTION_CHANGE: 804 handle = READ_BT_16(packet, 3); 805 conn = hci_connection_for_handle(handle); 806 if (!conn) break; 807 if (packet[2] == 0) { 808 if (packet[5]){ 809 conn->authentication_flags |= CONNECTION_ENCRYPTED; 810 } else { 811 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 812 } 813 } 814 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 815 break; 816 817 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 818 handle = READ_BT_16(packet, 3); 819 conn = hci_connection_for_handle(handle); 820 if (!conn) break; 821 822 // dedicated bonding: send result and disconnect 823 if (conn->bonding_flags & BONDING_DEDICATED){ 824 conn->bonding_flags &= ~BONDING_DEDICATED; 825 hci_emit_dedicated_bonding_result( conn, packet[2]); 826 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 827 break; 828 } 829 830 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 831 // link key sufficient for requested security 832 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 833 break; 834 } 835 // not enough 836 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 837 break; 838 839 #ifndef EMBEDDED 840 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 841 if (!hci_stack->remote_device_db) break; 842 if (packet[2]) break; // status not ok 843 bt_flip_addr(addr, &packet[3]); 844 // fix for invalid remote names - terminate on 0xff 845 for (i=0; i<248;i++){ 846 if (packet[9+i] == 0xff){ 847 packet[9+i] = 0; 848 break; 849 } 850 } 851 memset(&device_name, 0, sizeof(device_name_t)); 852 strncpy((char*) device_name, (char*) &packet[9], 248); 853 hci_stack->remote_device_db->put_name(&addr, &device_name); 854 break; 855 856 case HCI_EVENT_INQUIRY_RESULT: 857 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 858 if (!hci_stack->remote_device_db) break; 859 // first send inq result packet 860 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 861 // then send cached remote names 862 for (i=0; i<packet[2];i++){ 863 bt_flip_addr(addr, &packet[3+i*6]); 864 if (hci_stack->remote_device_db->get_name(&addr, &device_name)){ 865 hci_emit_remote_name_cached(&addr, &device_name); 866 } 867 } 868 return; 869 #endif 870 871 case HCI_EVENT_DISCONNECTION_COMPLETE: 872 if (!packet[2]){ 873 handle = READ_BT_16(packet, 3); 874 hci_connection_t * conn = hci_connection_for_handle(handle); 875 if (conn) { 876 hci_shutdown_connection(conn); 877 } 878 } 879 break; 880 881 case HCI_EVENT_HARDWARE_ERROR: 882 if(hci_stack->control && hci_stack->control->hw_error){ 883 (*hci_stack->control->hw_error)(); 884 } 885 break; 886 887 case DAEMON_EVENT_HCI_PACKET_SENT: 888 // free packet buffer for asynchronous transport 889 if (hci_transport_synchronous()) break; 890 hci_stack->hci_packet_buffer_reserved = 0; 891 break; 892 893 #ifdef HAVE_BLE 894 case HCI_EVENT_LE_META: 895 switch (packet[2]){ 896 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 897 if (hci_stack->le_scanning_state != LE_SCANNING) break; 898 le_handle_advertisement_report(packet, size); 899 break; 900 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 901 // Connection management 902 bt_flip_addr(addr, &packet[8]); 903 addr_type = (bd_addr_type_t)packet[7]; 904 log_info("LE Connection_complete (status=%u) type %u, %s\n", packet[3], addr_type, bd_addr_to_str(addr)); 905 // LE connections are auto-accepted, so just create a connection if there isn't one already 906 conn = hci_connection_for_bd_addr_and_type(&addr, addr_type); 907 if (packet[3]){ 908 if (conn){ 909 // outgoing connection failed, remove entry 910 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 911 btstack_memory_hci_connection_free( conn ); 912 } 913 // if authentication error, also delete link key 914 if (packet[3] == 0x05) { 915 hci_drop_link_key_for_bd_addr(&addr); 916 } 917 break; 918 } 919 if (!conn){ 920 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 921 } 922 if (!conn){ 923 // no memory 924 break; 925 } 926 927 conn->state = OPEN; 928 conn->con_handle = READ_BT_16(packet, 4); 929 930 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 931 932 // restart timer 933 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 934 // run_loop_add_timer(&conn->timeout); 935 936 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 937 938 hci_emit_nr_connections_changed(); 939 break; 940 941 // printf("LE buffer size: %u, count %u\n", READ_BT_16(packet,6), packet[8]); 942 943 default: 944 break; 945 } 946 break; 947 #endif 948 949 default: 950 break; 951 } 952 953 // handle BT initialization 954 if (hci_stack->state == HCI_STATE_INITIALIZING){ 955 if (hci_stack->substate % 2){ 956 // odd: waiting for event 957 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE || packet[0] == HCI_EVENT_COMMAND_STATUS){ 958 // wait for explicit COMMAND COMPLETE on RESET 959 if (hci_stack->substate > 1 || COMMAND_COMPLETE_EVENT(packet, hci_reset)) { 960 hci_stack->substate++; 961 } 962 } 963 } 964 } 965 966 // help with BT sleep 967 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 968 && hci_stack->substate == 1 969 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 970 hci_stack->substate++; 971 } 972 973 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 974 975 // execute main loop 976 hci_run(); 977 } 978 979 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 980 switch (packet_type) { 981 case HCI_EVENT_PACKET: 982 event_handler(packet, size); 983 break; 984 case HCI_ACL_DATA_PACKET: 985 acl_handler(packet, size); 986 break; 987 default: 988 break; 989 } 990 } 991 992 /** Register HCI packet handlers */ 993 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 994 hci_stack->packet_handler = handler; 995 } 996 997 void hci_state_reset(){ 998 // no connections yet 999 hci_stack->connections = NULL; 1000 hci_stack->discoverable = 0; 1001 hci_stack->connectable = 0; 1002 hci_stack->bondable = 1; 1003 1004 // no pending cmds 1005 hci_stack->decline_reason = 0; 1006 hci_stack->new_scan_enable_value = 0xff; 1007 1008 // LE 1009 hci_stack->adv_addr_type = 0; 1010 memset(hci_stack->adv_address, 0, 6); 1011 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1012 } 1013 1014 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 1015 1016 #ifdef HAVE_MALLOC 1017 if (!hci_stack) { 1018 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 1019 } 1020 #else 1021 hci_stack = &hci_stack_static; 1022 #endif 1023 memset(hci_stack, 0, sizeof(hci_stack_t)); 1024 1025 // reference to use transport layer implementation 1026 hci_stack->hci_transport = transport; 1027 1028 // references to used control implementation 1029 hci_stack->control = control; 1030 1031 // reference to used config 1032 hci_stack->config = config; 1033 1034 // higher level handler 1035 hci_stack->packet_handler = dummy_handler; 1036 1037 // store and open remote device db 1038 hci_stack->remote_device_db = remote_device_db; 1039 if (hci_stack->remote_device_db) { 1040 hci_stack->remote_device_db->open(); 1041 } 1042 1043 // max acl payload size defined in config.h 1044 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1045 1046 // register packet handlers with transport 1047 transport->register_packet_handler(&packet_handler); 1048 1049 hci_stack->state = HCI_STATE_OFF; 1050 1051 // class of device 1052 hci_stack->class_of_device = 0x007a020c; // Smartphone 1053 1054 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 1055 hci_stack->ssp_enable = 1; 1056 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 1057 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 1058 hci_stack->ssp_auto_accept = 1; 1059 1060 hci_state_reset(); 1061 } 1062 1063 void hci_close(){ 1064 // close remote device db 1065 if (hci_stack->remote_device_db) { 1066 hci_stack->remote_device_db->close(); 1067 } 1068 while (hci_stack->connections) { 1069 // cancel all l2cap connections 1070 hci_emit_disconnection_complete(((hci_connection_t *) hci_stack->connections)->con_handle, 0x16); // terminated by local host 1071 hci_shutdown_connection((hci_connection_t *) hci_stack->connections); 1072 } 1073 hci_power_control(HCI_POWER_OFF); 1074 1075 #ifdef HAVE_MALLOC 1076 free(hci_stack); 1077 #endif 1078 hci_stack = NULL; 1079 } 1080 1081 void hci_set_class_of_device(uint32_t class_of_device){ 1082 hci_stack->class_of_device = class_of_device; 1083 } 1084 1085 void hci_disable_l2cap_timeout_check(){ 1086 disable_l2cap_timeouts = 1; 1087 } 1088 // State-Module-Driver overview 1089 // state module low-level 1090 // HCI_STATE_OFF off close 1091 // HCI_STATE_INITIALIZING, on open 1092 // HCI_STATE_WORKING, on open 1093 // HCI_STATE_HALTING, on open 1094 // HCI_STATE_SLEEPING, off/sleep close 1095 // HCI_STATE_FALLING_ASLEEP on open 1096 1097 static int hci_power_control_on(void){ 1098 1099 // power on 1100 int err = 0; 1101 if (hci_stack->control && hci_stack->control->on){ 1102 err = (*hci_stack->control->on)(hci_stack->config); 1103 } 1104 if (err){ 1105 log_error( "POWER_ON failed\n"); 1106 hci_emit_hci_open_failed(); 1107 return err; 1108 } 1109 1110 // open low-level device 1111 err = hci_stack->hci_transport->open(hci_stack->config); 1112 if (err){ 1113 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 1114 if (hci_stack->control && hci_stack->control->off){ 1115 (*hci_stack->control->off)(hci_stack->config); 1116 } 1117 hci_emit_hci_open_failed(); 1118 return err; 1119 } 1120 return 0; 1121 } 1122 1123 static void hci_power_control_off(void){ 1124 1125 log_info("hci_power_control_off\n"); 1126 1127 // close low-level device 1128 hci_stack->hci_transport->close(hci_stack->config); 1129 1130 log_info("hci_power_control_off - hci_transport closed\n"); 1131 1132 // power off 1133 if (hci_stack->control && hci_stack->control->off){ 1134 (*hci_stack->control->off)(hci_stack->config); 1135 } 1136 1137 log_info("hci_power_control_off - control closed\n"); 1138 1139 hci_stack->state = HCI_STATE_OFF; 1140 } 1141 1142 static void hci_power_control_sleep(void){ 1143 1144 log_info("hci_power_control_sleep\n"); 1145 1146 #if 0 1147 // don't close serial port during sleep 1148 1149 // close low-level device 1150 hci_stack->hci_transport->close(hci_stack->config); 1151 #endif 1152 1153 // sleep mode 1154 if (hci_stack->control && hci_stack->control->sleep){ 1155 (*hci_stack->control->sleep)(hci_stack->config); 1156 } 1157 1158 hci_stack->state = HCI_STATE_SLEEPING; 1159 } 1160 1161 static int hci_power_control_wake(void){ 1162 1163 log_info("hci_power_control_wake\n"); 1164 1165 // wake on 1166 if (hci_stack->control && hci_stack->control->wake){ 1167 (*hci_stack->control->wake)(hci_stack->config); 1168 } 1169 1170 #if 0 1171 // open low-level device 1172 int err = hci_stack->hci_transport->open(hci_stack->config); 1173 if (err){ 1174 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 1175 if (hci_stack->control && hci_stack->control->off){ 1176 (*hci_stack->control->off)(hci_stack->config); 1177 } 1178 hci_emit_hci_open_failed(); 1179 return err; 1180 } 1181 #endif 1182 1183 return 0; 1184 } 1185 1186 1187 int hci_power_control(HCI_POWER_MODE power_mode){ 1188 1189 log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack->state); 1190 1191 int err = 0; 1192 switch (hci_stack->state){ 1193 1194 case HCI_STATE_OFF: 1195 switch (power_mode){ 1196 case HCI_POWER_ON: 1197 err = hci_power_control_on(); 1198 if (err) return err; 1199 // set up state machine 1200 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 1201 hci_stack->state = HCI_STATE_INITIALIZING; 1202 hci_stack->substate = 0; 1203 break; 1204 case HCI_POWER_OFF: 1205 // do nothing 1206 break; 1207 case HCI_POWER_SLEEP: 1208 // do nothing (with SLEEP == OFF) 1209 break; 1210 } 1211 break; 1212 1213 case HCI_STATE_INITIALIZING: 1214 switch (power_mode){ 1215 case HCI_POWER_ON: 1216 // do nothing 1217 break; 1218 case HCI_POWER_OFF: 1219 // no connections yet, just turn it off 1220 hci_power_control_off(); 1221 break; 1222 case HCI_POWER_SLEEP: 1223 // no connections yet, just turn it off 1224 hci_power_control_sleep(); 1225 break; 1226 } 1227 break; 1228 1229 case HCI_STATE_WORKING: 1230 switch (power_mode){ 1231 case HCI_POWER_ON: 1232 // do nothing 1233 break; 1234 case HCI_POWER_OFF: 1235 // see hci_run 1236 hci_stack->state = HCI_STATE_HALTING; 1237 break; 1238 case HCI_POWER_SLEEP: 1239 // see hci_run 1240 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 1241 hci_stack->substate = 0; 1242 break; 1243 } 1244 break; 1245 1246 case HCI_STATE_HALTING: 1247 switch (power_mode){ 1248 case HCI_POWER_ON: 1249 // set up state machine 1250 hci_stack->state = HCI_STATE_INITIALIZING; 1251 hci_stack->substate = 0; 1252 break; 1253 case HCI_POWER_OFF: 1254 // do nothing 1255 break; 1256 case HCI_POWER_SLEEP: 1257 // see hci_run 1258 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 1259 hci_stack->substate = 0; 1260 break; 1261 } 1262 break; 1263 1264 case HCI_STATE_FALLING_ASLEEP: 1265 switch (power_mode){ 1266 case HCI_POWER_ON: 1267 1268 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1269 // nothing to do, if H4 supports power management 1270 if (bt_control_iphone_power_management_enabled()){ 1271 hci_stack->state = HCI_STATE_INITIALIZING; 1272 hci_stack->substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1273 break; 1274 } 1275 #endif 1276 // set up state machine 1277 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 1278 hci_stack->state = HCI_STATE_INITIALIZING; 1279 hci_stack->substate = 0; 1280 break; 1281 case HCI_POWER_OFF: 1282 // see hci_run 1283 hci_stack->state = HCI_STATE_HALTING; 1284 break; 1285 case HCI_POWER_SLEEP: 1286 // do nothing 1287 break; 1288 } 1289 break; 1290 1291 case HCI_STATE_SLEEPING: 1292 switch (power_mode){ 1293 case HCI_POWER_ON: 1294 1295 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1296 // nothing to do, if H4 supports power management 1297 if (bt_control_iphone_power_management_enabled()){ 1298 hci_stack->state = HCI_STATE_INITIALIZING; 1299 hci_stack->substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1300 hci_update_scan_enable(); 1301 break; 1302 } 1303 #endif 1304 err = hci_power_control_wake(); 1305 if (err) return err; 1306 // set up state machine 1307 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 1308 hci_stack->state = HCI_STATE_INITIALIZING; 1309 hci_stack->substate = 0; 1310 break; 1311 case HCI_POWER_OFF: 1312 hci_stack->state = HCI_STATE_HALTING; 1313 break; 1314 case HCI_POWER_SLEEP: 1315 // do nothing 1316 break; 1317 } 1318 break; 1319 } 1320 1321 // create internal event 1322 hci_emit_state(); 1323 1324 // trigger next/first action 1325 hci_run(); 1326 1327 return 0; 1328 } 1329 1330 static void hci_update_scan_enable(void){ 1331 // 2 = page scan, 1 = inq scan 1332 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 1333 hci_run(); 1334 } 1335 1336 void hci_discoverable_control(uint8_t enable){ 1337 if (enable) enable = 1; // normalize argument 1338 1339 if (hci_stack->discoverable == enable){ 1340 hci_emit_discoverable_enabled(hci_stack->discoverable); 1341 return; 1342 } 1343 1344 hci_stack->discoverable = enable; 1345 hci_update_scan_enable(); 1346 } 1347 1348 void hci_connectable_control(uint8_t enable){ 1349 if (enable) enable = 1; // normalize argument 1350 1351 // don't emit event 1352 if (hci_stack->connectable == enable) return; 1353 1354 hci_stack->connectable = enable; 1355 hci_update_scan_enable(); 1356 } 1357 1358 bd_addr_t * hci_local_bd_addr(void){ 1359 return &hci_stack->local_bd_addr; 1360 } 1361 1362 void hci_run(){ 1363 1364 hci_connection_t * connection; 1365 linked_item_t * it; 1366 1367 if (!hci_can_send_packet_now_using_packet_buffer(HCI_COMMAND_DATA_PACKET)) return; 1368 1369 // global/non-connection oriented commands 1370 1371 // decline incoming connections 1372 if (hci_stack->decline_reason){ 1373 uint8_t reason = hci_stack->decline_reason; 1374 hci_stack->decline_reason = 0; 1375 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 1376 return; 1377 } 1378 1379 // send scan enable 1380 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 1381 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1382 hci_stack->new_scan_enable_value = 0xff; 1383 return; 1384 } 1385 1386 #ifdef HAVE_BLE 1387 // handle le scan 1388 if (hci_stack->state == HCI_STATE_WORKING){ 1389 switch(hci_stack->le_scanning_state){ 1390 case LE_START_SCAN: 1391 hci_stack->le_scanning_state = LE_SCANNING; 1392 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 1393 return; 1394 1395 case LE_STOP_SCAN: 1396 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1397 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 1398 return; 1399 default: 1400 break; 1401 } 1402 } 1403 #endif 1404 1405 // send pending HCI commands 1406 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 1407 connection = (hci_connection_t *) it; 1408 1409 switch(connection->state){ 1410 case SEND_CREATE_CONNECTION: 1411 switch(connection->address_type){ 1412 case BD_ADDR_TYPE_CLASSIC: 1413 log_info("sending hci_create_connection\n"); 1414 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 1415 break; 1416 default: 1417 #ifdef HAVE_BLE 1418 log_info("sending hci_le_create_connection\n"); 1419 hci_send_cmd(&hci_le_create_connection, 1420 1000, // scan interval: 625 ms 1421 1000, // scan interval: 625 ms 1422 0, // don't use whitelist 1423 connection->address_type, // peer address type 1424 connection->address, // peer bd addr 1425 0, // our addr type: public 1426 80, // conn interval min 1427 80, // conn interval max (3200 * 0.625) 1428 0, // conn latency 1429 2000, // supervision timeout 1430 0, // min ce length 1431 1000 // max ce length 1432 ); 1433 1434 connection->state = SENT_CREATE_CONNECTION; 1435 #endif 1436 break; 1437 } 1438 return; 1439 1440 case RECEIVED_CONNECTION_REQUEST: 1441 log_info("sending hci_accept_connection_request\n"); 1442 connection->state = ACCEPTED_CONNECTION_REQUEST; 1443 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 1444 return; 1445 1446 #ifdef HAVE_BLE 1447 case SEND_CANCEL_CONNECTION: 1448 connection->state = SENT_CANCEL_CONNECTION; 1449 hci_send_cmd(&hci_le_create_connection_cancel); 1450 return; 1451 #endif 1452 case SEND_DISCONNECT: 1453 connection->state = SENT_DISCONNECT; 1454 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1455 return; 1456 1457 default: 1458 break; 1459 } 1460 1461 1462 1463 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 1464 log_info("responding to link key request\n"); 1465 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 1466 link_key_t link_key; 1467 link_key_type_t link_key_type; 1468 if ( hci_stack->remote_device_db 1469 && hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type) 1470 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 1471 connection->link_key_type = link_key_type; 1472 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 1473 } else { 1474 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 1475 } 1476 return; 1477 } 1478 1479 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 1480 log_info("denying to pin request\n"); 1481 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 1482 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 1483 return; 1484 } 1485 1486 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 1487 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 1488 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 1489 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 1490 // tweak authentication requirements 1491 uint8_t authreq = hci_stack->ssp_authentication_requirement; 1492 if (connection->bonding_flags & BONDING_DEDICATED){ 1493 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 1494 } 1495 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 1496 authreq |= 1; 1497 } 1498 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 1499 } else { 1500 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 1501 } 1502 return; 1503 } 1504 1505 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 1506 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 1507 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 1508 return; 1509 } 1510 1511 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 1512 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 1513 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 1514 return; 1515 } 1516 1517 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 1518 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 1519 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 1520 return; 1521 } 1522 1523 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 1524 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 1525 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 1526 return; 1527 } 1528 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 1529 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 1530 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 1531 return; 1532 } 1533 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 1534 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 1535 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 1536 return; 1537 } 1538 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 1539 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 1540 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 1541 return; 1542 } 1543 } 1544 1545 switch (hci_stack->state){ 1546 case HCI_STATE_INITIALIZING: 1547 // log_info("hci_init: substate %u\n", hci_stack->substate); 1548 if (hci_stack->substate % 2) { 1549 // odd: waiting for command completion 1550 return; 1551 } 1552 switch (hci_stack->substate >> 1){ 1553 case 0: // RESET 1554 hci_state_reset(); 1555 1556 hci_send_cmd(&hci_reset); 1557 if (hci_stack->config == 0 || ((hci_uart_config_t *)hci_stack->config)->baudrate_main == 0){ 1558 // skip baud change 1559 hci_stack->substate = 4; // >> 1 = 2 1560 } 1561 break; 1562 case 1: // SEND BAUD CHANGE 1563 hci_stack->control->baudrate_cmd(hci_stack->config, ((hci_uart_config_t *)hci_stack->config)->baudrate_main, hci_stack->hci_packet_buffer); 1564 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1565 break; 1566 case 2: // LOCAL BAUD CHANGE 1567 hci_stack->hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack->config)->baudrate_main); 1568 hci_stack->substate += 2; 1569 // break missing here for fall through 1570 1571 case 3: 1572 // Custom initialization 1573 if (hci_stack->control && hci_stack->control->next_cmd){ 1574 int valid_cmd = (*hci_stack->control->next_cmd)(hci_stack->config, hci_stack->hci_packet_buffer); 1575 if (valid_cmd){ 1576 int size = 3 + hci_stack->hci_packet_buffer[2]; 1577 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1578 hci_stack->substate = 4; // more init commands 1579 break; 1580 } 1581 log_info("hci_run: init script done\n\r"); 1582 } 1583 // otherwise continue 1584 hci_send_cmd(&hci_read_bd_addr); 1585 break; 1586 case 4: 1587 hci_send_cmd(&hci_read_buffer_size); 1588 break; 1589 case 5: 1590 hci_send_cmd(&hci_read_local_supported_features); 1591 break; 1592 case 6: 1593 if (hci_le_supported()){ 1594 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1595 } else { 1596 // Kensington Bluetoot 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1597 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1598 } 1599 1600 // skip Classic init commands for LE only chipsets 1601 if (!hci_classic_supported()){ 1602 if (hci_le_supported()){ 1603 hci_stack->substate = 11 << 1; // skip all classic command 1604 } else { 1605 log_error("Neither BR/EDR nor LE supported"); 1606 hci_stack->substate = 14 << 1; // skip all 1607 } 1608 } 1609 break; 1610 case 7: 1611 if (hci_ssp_supported()){ 1612 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1613 break; 1614 } 1615 hci_stack->substate += 2; 1616 // break missing here for fall through 1617 1618 case 8: 1619 // ca. 15 sec 1620 hci_send_cmd(&hci_write_page_timeout, 0x6000); 1621 break; 1622 case 9: 1623 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1624 break; 1625 case 10: 1626 if (hci_stack->local_name){ 1627 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1628 } else { 1629 char hostname[30]; 1630 #ifdef EMBEDDED 1631 // BTstack-11:22:33:44:55:66 1632 strcpy(hostname, "BTstack "); 1633 strcat(hostname, bd_addr_to_str(hci_stack->local_bd_addr)); 1634 printf("---> Name %s\n", hostname); 1635 #else 1636 // hostname for POSIX systems 1637 gethostname(hostname, 30); 1638 hostname[29] = '\0'; 1639 #endif 1640 hci_send_cmd(&hci_write_local_name, hostname); 1641 } 1642 break; 1643 case 11: 1644 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1645 if (!hci_le_supported()){ 1646 // SKIP LE init for Classic only configuration 1647 hci_stack->substate = 14 << 1; 1648 } 1649 break; 1650 1651 #ifdef HAVE_BLE 1652 // LE INIT 1653 case 12: 1654 hci_send_cmd(&hci_le_read_buffer_size); 1655 break; 1656 case 13: 1657 // LE Supported Host = 1, Simultaneous Host = 0 1658 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1659 break; 1660 case 14: 1661 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 1662 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 1663 break; 1664 #endif 1665 1666 // DONE 1667 case 15: 1668 // done. 1669 hci_stack->state = HCI_STATE_WORKING; 1670 hci_emit_state(); 1671 break; 1672 default: 1673 break; 1674 } 1675 hci_stack->substate++; 1676 break; 1677 1678 case HCI_STATE_HALTING: 1679 1680 log_info("HCI_STATE_HALTING\n"); 1681 // close all open connections 1682 connection = (hci_connection_t *) hci_stack->connections; 1683 if (connection){ 1684 1685 // send disconnect 1686 if (!hci_can_send_packet_now_using_packet_buffer(HCI_COMMAND_DATA_PACKET)) return; 1687 1688 log_info("HCI_STATE_HALTING, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1689 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1690 1691 // send disconnected event right away - causes higher layer connections to get closed, too. 1692 hci_shutdown_connection(connection); 1693 return; 1694 } 1695 log_info("HCI_STATE_HALTING, calling off\n"); 1696 1697 // switch mode 1698 hci_power_control_off(); 1699 1700 log_info("HCI_STATE_HALTING, emitting state\n"); 1701 hci_emit_state(); 1702 log_info("HCI_STATE_HALTING, done\n"); 1703 break; 1704 1705 case HCI_STATE_FALLING_ASLEEP: 1706 switch(hci_stack->substate) { 1707 case 0: 1708 log_info("HCI_STATE_FALLING_ASLEEP\n"); 1709 // close all open connections 1710 connection = (hci_connection_t *) hci_stack->connections; 1711 1712 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1713 // don't close connections, if H4 supports power management 1714 if (bt_control_iphone_power_management_enabled()){ 1715 connection = NULL; 1716 } 1717 #endif 1718 if (connection){ 1719 1720 // send disconnect 1721 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1722 1723 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1724 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1725 1726 // send disconnected event right away - causes higher layer connections to get closed, too. 1727 hci_shutdown_connection(connection); 1728 return; 1729 } 1730 1731 if (hci_classic_supported()){ 1732 // disable page and inquiry scan 1733 if (!hci_can_send_packet_now_using_packet_buffer(HCI_COMMAND_DATA_PACKET)) return; 1734 1735 log_info("HCI_STATE_HALTING, disabling inq scans\n"); 1736 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 1737 1738 // continue in next sub state 1739 hci_stack->substate++; 1740 break; 1741 } 1742 // fall through for ble-only chips 1743 1744 case 2: 1745 log_info("HCI_STATE_HALTING, calling sleep\n"); 1746 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1747 // don't actually go to sleep, if H4 supports power management 1748 if (bt_control_iphone_power_management_enabled()){ 1749 // SLEEP MODE reached 1750 hci_stack->state = HCI_STATE_SLEEPING; 1751 hci_emit_state(); 1752 break; 1753 } 1754 #endif 1755 // switch mode 1756 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 1757 hci_emit_state(); 1758 break; 1759 1760 default: 1761 break; 1762 } 1763 break; 1764 1765 default: 1766 break; 1767 } 1768 } 1769 1770 int hci_send_cmd_packet(uint8_t *packet, int size){ 1771 bd_addr_t addr; 1772 hci_connection_t * conn; 1773 // house-keeping 1774 1775 // create_connection? 1776 if (IS_COMMAND(packet, hci_create_connection)){ 1777 bt_flip_addr(addr, &packet[3]); 1778 log_info("Create_connection to %s\n", bd_addr_to_str(addr)); 1779 1780 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1781 if (!conn){ 1782 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1783 if (!conn){ 1784 // notify client that alloc failed 1785 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 1786 return 0; // don't sent packet to controller 1787 } 1788 conn->state = SEND_CREATE_CONNECTION; 1789 } 1790 log_info("conn state %u", conn->state); 1791 switch (conn->state){ 1792 // if connection active exists 1793 case OPEN: 1794 // and OPEN, emit connection complete command, don't send to controller 1795 hci_emit_connection_complete(conn, 0); 1796 return 0; 1797 case SEND_CREATE_CONNECTION: 1798 // connection created by hci, e.g. dedicated bonding 1799 break; 1800 default: 1801 // otherwise, just ignore as it is already in the open process 1802 return 0; 1803 } 1804 conn->state = SENT_CREATE_CONNECTION; 1805 } 1806 1807 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1808 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1809 } 1810 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1811 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1812 } 1813 1814 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1815 if (hci_stack->remote_device_db){ 1816 bt_flip_addr(addr, &packet[3]); 1817 hci_stack->remote_device_db->delete_link_key(&addr); 1818 } 1819 } 1820 1821 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 1822 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 1823 bt_flip_addr(addr, &packet[3]); 1824 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1825 if (conn){ 1826 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 1827 } 1828 } 1829 1830 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 1831 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 1832 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 1833 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 1834 bt_flip_addr(addr, &packet[3]); 1835 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1836 if (conn){ 1837 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 1838 } 1839 } 1840 1841 #ifdef HAVE_BLE 1842 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 1843 hci_stack->adv_addr_type = packet[8]; 1844 } 1845 if (IS_COMMAND(packet, hci_le_set_random_address)){ 1846 bt_flip_addr(hci_stack->adv_address, &packet[3]); 1847 } 1848 #endif 1849 1850 hci_stack->num_cmd_packets--; 1851 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1852 1853 // free packet buffer for synchronous transport implementations 1854 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 1855 hci_stack->hci_packet_buffer_reserved = 0; 1856 } 1857 1858 return err; 1859 } 1860 1861 // disconnect because of security block 1862 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 1863 hci_connection_t * connection = hci_connection_for_handle(con_handle); 1864 if (!connection) return; 1865 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 1866 } 1867 1868 1869 // Configure Secure Simple Pairing 1870 1871 // enable will enable SSP during init 1872 void hci_ssp_set_enable(int enable){ 1873 hci_stack->ssp_enable = enable; 1874 } 1875 1876 int hci_local_ssp_activated(){ 1877 return hci_ssp_supported() && hci_stack->ssp_enable; 1878 } 1879 1880 // if set, BTstack will respond to io capability request using authentication requirement 1881 void hci_ssp_set_io_capability(int io_capability){ 1882 hci_stack->ssp_io_capability = io_capability; 1883 } 1884 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 1885 hci_stack->ssp_authentication_requirement = authentication_requirement; 1886 } 1887 1888 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 1889 void hci_ssp_set_auto_accept(int auto_accept){ 1890 hci_stack->ssp_auto_accept = auto_accept; 1891 } 1892 1893 /** 1894 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1895 */ 1896 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1897 va_list argptr; 1898 va_start(argptr, cmd); 1899 uint16_t size = hci_create_cmd_internal(hci_stack->hci_packet_buffer, cmd, argptr); 1900 va_end(argptr); 1901 return hci_send_cmd_packet(hci_stack->hci_packet_buffer, size); 1902 } 1903 1904 // Create various non-HCI events. 1905 // TODO: generalize, use table similar to hci_create_command 1906 1907 void hci_emit_state(){ 1908 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 1909 uint8_t event[3]; 1910 event[0] = BTSTACK_EVENT_STATE; 1911 event[1] = sizeof(event) - 2; 1912 event[2] = hci_stack->state; 1913 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1914 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1915 } 1916 1917 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 1918 uint8_t event[13]; 1919 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1920 event[1] = sizeof(event) - 2; 1921 event[2] = status; 1922 bt_store_16(event, 3, conn->con_handle); 1923 bt_flip_addr(&event[5], conn->address); 1924 event[11] = 1; // ACL connection 1925 event[12] = 0; // encryption disabled 1926 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1927 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1928 } 1929 1930 void hci_emit_le_connection_complete(hci_connection_t *conn, uint8_t status){ 1931 uint8_t event[21]; 1932 event[0] = HCI_EVENT_LE_META; 1933 event[1] = sizeof(event) - 2; 1934 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 1935 event[3] = status; 1936 bt_store_16(event, 4, conn->con_handle); 1937 event[6] = 0; // TODO: role 1938 event[7] = conn->address_type; 1939 bt_flip_addr(&event[8], conn->address); 1940 bt_store_16(event, 14, 0); // interval 1941 bt_store_16(event, 16, 0); // latency 1942 bt_store_16(event, 18, 0); // supervision timeout 1943 event[20] = 0; // master clock accuracy 1944 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1945 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1946 } 1947 1948 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 1949 uint8_t event[6]; 1950 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1951 event[1] = sizeof(event) - 2; 1952 event[2] = 0; // status = OK 1953 bt_store_16(event, 3, handle); 1954 event[5] = reason; 1955 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1956 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1957 } 1958 1959 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1960 if (disable_l2cap_timeouts) return; 1961 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 1962 uint8_t event[4]; 1963 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 1964 event[1] = sizeof(event) - 2; 1965 bt_store_16(event, 2, conn->con_handle); 1966 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1967 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1968 } 1969 1970 void hci_emit_nr_connections_changed(){ 1971 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 1972 uint8_t event[3]; 1973 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 1974 event[1] = sizeof(event) - 2; 1975 event[2] = nr_hci_connections(); 1976 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1977 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1978 } 1979 1980 void hci_emit_hci_open_failed(){ 1981 log_info("BTSTACK_EVENT_POWERON_FAILED"); 1982 uint8_t event[2]; 1983 event[0] = BTSTACK_EVENT_POWERON_FAILED; 1984 event[1] = sizeof(event) - 2; 1985 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1986 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1987 } 1988 1989 #ifndef EMBEDDED 1990 void hci_emit_btstack_version() { 1991 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 1992 uint8_t event[6]; 1993 event[0] = BTSTACK_EVENT_VERSION; 1994 event[1] = sizeof(event) - 2; 1995 event[2] = BTSTACK_MAJOR; 1996 event[3] = BTSTACK_MINOR; 1997 bt_store_16(event, 4, BTSTACK_REVISION); 1998 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1999 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2000 } 2001 #endif 2002 2003 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 2004 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 2005 uint8_t event[3]; 2006 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 2007 event[1] = sizeof(event) - 2; 2008 event[2] = enabled; 2009 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2010 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2011 } 2012 2013 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 2014 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 2015 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 2016 event[1] = sizeof(event) - 2 - 1; 2017 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 2018 bt_flip_addr(&event[3], *addr); 2019 memcpy(&event[9], name, 248); 2020 2021 event[9+248] = 0; // assert \0 for log_info 2022 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(*addr), &event[9]); 2023 2024 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 2025 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 2026 } 2027 2028 void hci_emit_discoverable_enabled(uint8_t enabled){ 2029 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 2030 uint8_t event[3]; 2031 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 2032 event[1] = sizeof(event) - 2; 2033 event[2] = enabled; 2034 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2035 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2036 } 2037 2038 void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 2039 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 2040 uint8_t event[5]; 2041 int pos = 0; 2042 event[pos++] = GAP_SECURITY_LEVEL; 2043 event[pos++] = sizeof(event) - 2; 2044 bt_store_16(event, 2, con_handle); 2045 pos += 2; 2046 event[pos++] = level; 2047 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2048 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2049 } 2050 2051 void hci_emit_dedicated_bonding_result(hci_connection_t * connection, uint8_t status){ 2052 log_info("hci_emit_dedicated_bonding_result %u ", status); 2053 uint8_t event[9]; 2054 int pos = 0; 2055 event[pos++] = GAP_DEDICATED_BONDING_COMPLETED; 2056 event[pos++] = sizeof(event) - 2; 2057 event[pos++] = status; 2058 bt_flip_addr( * (bd_addr_t *) &event[pos], connection->address); 2059 pos += 6; 2060 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2061 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2062 } 2063 2064 // query if remote side supports SSP 2065 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 2066 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2067 if (!connection) return 0; 2068 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 2069 } 2070 2071 int hci_ssp_supported_on_both_sides(hci_con_handle_t handle){ 2072 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 2073 } 2074 2075 // GAP API 2076 /** 2077 * @bbrief enable/disable bonding. default is enabled 2078 * @praram enabled 2079 */ 2080 void gap_set_bondable_mode(int enable){ 2081 hci_stack->bondable = enable ? 1 : 0; 2082 } 2083 2084 /** 2085 * @brief map link keys to security levels 2086 */ 2087 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 2088 switch (link_key_type){ 2089 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 2090 return LEVEL_4; 2091 case COMBINATION_KEY: 2092 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 2093 return LEVEL_3; 2094 default: 2095 return LEVEL_2; 2096 } 2097 } 2098 2099 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 2100 if (!connection) return LEVEL_0; 2101 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 2102 return gap_security_level_for_link_key_type(connection->link_key_type); 2103 } 2104 2105 2106 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 2107 printf("gap_mitm_protection_required_for_security_level %u\n", level); 2108 return level > LEVEL_2; 2109 } 2110 2111 /** 2112 * @brief get current security level 2113 */ 2114 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 2115 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2116 if (!connection) return LEVEL_0; 2117 return gap_security_level_for_connection(connection); 2118 } 2119 2120 /** 2121 * @brief request connection to device to 2122 * @result GAP_AUTHENTICATION_RESULT 2123 */ 2124 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 2125 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2126 if (!connection){ 2127 hci_emit_security_level(con_handle, LEVEL_0); 2128 return; 2129 } 2130 gap_security_level_t current_level = gap_security_level(con_handle); 2131 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 2132 if (current_level >= requested_level){ 2133 hci_emit_security_level(con_handle, current_level); 2134 return; 2135 } 2136 2137 connection->requested_security_level = requested_level; 2138 2139 // would enabling ecnryption suffice (>= LEVEL_2)? 2140 if (hci_stack->remote_device_db){ 2141 link_key_type_t link_key_type; 2142 link_key_t link_key; 2143 if (hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 2144 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 2145 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2146 return; 2147 } 2148 } 2149 } 2150 2151 // try to authenticate connection 2152 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2153 hci_run(); 2154 } 2155 2156 /** 2157 * @brief start dedicated bonding with device. disconnect after bonding 2158 * @param device 2159 * @param request MITM protection 2160 * @result GAP_DEDICATED_BONDING_COMPLETE 2161 */ 2162 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 2163 2164 // create connection state machine 2165 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 2166 2167 if (!connection){ 2168 return BTSTACK_MEMORY_ALLOC_FAILED; 2169 } 2170 2171 // delete linkn key 2172 hci_drop_link_key_for_bd_addr( (bd_addr_t *) &device); 2173 2174 // configure LEVEL_2/3, dedicated bonding 2175 connection->state = SEND_CREATE_CONNECTION; 2176 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 2177 printf("gap_dedicated_bonding, mitm %u -> level %u\n", mitm_protection_required, connection->requested_security_level); 2178 connection->bonding_flags = BONDING_DEDICATED; 2179 2180 // wait for GAP Security Result and send GAP Dedicated Bonding complete 2181 2182 // handle: connnection failure (connection complete != ok) 2183 // handle: authentication failure 2184 // handle: disconnect on done 2185 2186 hci_run(); 2187 2188 return 0; 2189 } 2190 2191 void gap_set_local_name(const char * local_name){ 2192 hci_stack->local_name = local_name; 2193 } 2194 2195 le_command_status_t le_central_start_scan(){ 2196 if (hci_stack->le_scanning_state == LE_SCANNING) return BLE_PERIPHERAL_OK; 2197 hci_stack->le_scanning_state = LE_START_SCAN; 2198 hci_run(); 2199 return BLE_PERIPHERAL_OK; 2200 } 2201 2202 le_command_status_t le_central_stop_scan(){ 2203 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return BLE_PERIPHERAL_OK; 2204 hci_stack->le_scanning_state = LE_STOP_SCAN; 2205 hci_run(); 2206 return BLE_PERIPHERAL_OK; 2207 } 2208 2209 2210 le_command_status_t le_central_connect(bd_addr_t * addr, bd_addr_type_t addr_type){ 2211 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2212 log_info("le_central_connect, conn struct %p", conn); 2213 if (!conn){ 2214 conn = create_connection_for_bd_addr_and_type(*addr, addr_type); 2215 if (!conn){ 2216 // notify client that alloc failed 2217 hci_emit_le_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 2218 return BLE_PERIPHERAL_NOT_CONNECTED; // don't sent packet to controller 2219 } 2220 conn->state = SEND_CREATE_CONNECTION; 2221 log_info("le_central_connect, state %u", conn->state); 2222 hci_run(); 2223 return BLE_PERIPHERAL_OK; 2224 } 2225 2226 if (!hci_is_le_connection(conn) || 2227 conn->state == SEND_CREATE_CONNECTION || 2228 conn->state == SENT_CREATE_CONNECTION) { 2229 hci_emit_le_connection_complete(conn, ERROR_CODE_COMMAND_DISALLOWED); 2230 return BLE_PERIPHERAL_IN_WRONG_STATE; 2231 } 2232 2233 log_info("le_central_connect, state %u", conn->state); 2234 hci_emit_le_connection_complete(conn, 0); 2235 hci_run(); 2236 return BLE_PERIPHERAL_OK; 2237 } 2238 2239 // @assumption: only a single outgoing LE Connection exists 2240 static hci_connection_t * le_central_get_outgoing_connection(){ 2241 linked_item_t *it; 2242 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 2243 hci_connection_t * conn = (hci_connection_t *) it; 2244 if (!hci_is_le_connection(conn)) continue; 2245 switch (conn->state){ 2246 case SEND_CREATE_CONNECTION: 2247 case SENT_CREATE_CONNECTION: 2248 return conn; 2249 default: 2250 break; 2251 }; 2252 } 2253 return NULL; 2254 } 2255 2256 le_command_status_t le_central_connect_cancel(){ 2257 hci_connection_t * conn = le_central_get_outgoing_connection(); 2258 switch (conn->state){ 2259 case SEND_CREATE_CONNECTION: 2260 // skip sending create connection and emit event instead 2261 hci_emit_le_connection_complete(conn, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 2262 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 2263 btstack_memory_hci_connection_free( conn ); 2264 break; 2265 case SENT_CREATE_CONNECTION: 2266 // request to send cancel connection 2267 conn->state = SEND_CANCEL_CONNECTION; 2268 hci_run(); 2269 break; 2270 default: 2271 break; 2272 } 2273 return BLE_PERIPHERAL_OK; 2274 } 2275 2276 le_command_status_t gap_disconnect(hci_con_handle_t handle){ 2277 hci_connection_t * conn = hci_connection_for_handle(handle); 2278 if (!conn){ 2279 hci_emit_disconnection_complete(handle, 0); 2280 return BLE_PERIPHERAL_OK; 2281 } 2282 conn->state = SEND_DISCONNECT; 2283 hci_run(); 2284 return BLE_PERIPHERAL_OK; 2285 } 2286