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 static int hci_power_control_on(void); 77 static void hci_power_control_off(void); 78 79 // the STACK is here 80 #ifndef HAVE_MALLOC 81 static hci_stack_t hci_stack_static; 82 #endif 83 static hci_stack_t * hci_stack = NULL; 84 85 // test helper 86 static uint8_t disable_l2cap_timeouts = 0; 87 88 /** 89 * create connection for given address 90 * 91 * @return connection OR NULL, if no memory left 92 */ 93 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 94 95 printf("create_connection_for_addr %s\n", bd_addr_to_str(addr)); 96 hci_connection_t * conn = (hci_connection_t *) btstack_memory_hci_connection_get(); 97 if (!conn) return NULL; 98 BD_ADDR_COPY(conn->address, addr); 99 conn->address_type = addr_type; 100 conn->con_handle = 0xffff; 101 conn->authentication_flags = AUTH_FLAGS_NONE; 102 conn->bonding_flags = 0; 103 conn->requested_security_level = LEVEL_0; 104 linked_item_set_user(&conn->timeout.item, conn); 105 conn->timeout.process = hci_connection_timeout_handler; 106 hci_connection_timestamp(conn); 107 conn->acl_recombination_length = 0; 108 conn->acl_recombination_pos = 0; 109 conn->num_acl_packets_sent = 0; 110 linked_list_add(&hci_stack->connections, (linked_item_t *) conn); 111 return conn; 112 } 113 114 /** 115 * get connection for a given handle 116 * 117 * @return connection OR NULL, if not found 118 */ 119 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 120 linked_item_t *it; 121 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 122 if ( ((hci_connection_t *) it)->con_handle == con_handle){ 123 return (hci_connection_t *) it; 124 } 125 } 126 return NULL; 127 } 128 129 /** 130 * get connection for given address 131 * 132 * @return connection OR NULL, if not found 133 */ 134 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t * addr, bd_addr_type_t addr_type){ 135 linked_item_t *it; 136 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 137 hci_connection_t * connection = (hci_connection_t *) it; 138 if (connection->address_type != addr_type) continue; 139 if (memcmp(addr, connection->address, 6) != 0) continue; 140 return connection; 141 } 142 return NULL; 143 } 144 145 static void hci_connection_timeout_handler(timer_source_t *timer){ 146 hci_connection_t * connection = (hci_connection_t *) linked_item_get_user(&timer->item); 147 #ifdef HAVE_TIME 148 struct timeval tv; 149 gettimeofday(&tv, NULL); 150 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 151 // connections might be timed out 152 hci_emit_l2cap_check_timeout(connection); 153 } 154 #endif 155 #ifdef HAVE_TICK 156 if (embedded_get_ticks() > connection->timestamp + embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 157 // connections might be timed out 158 hci_emit_l2cap_check_timeout(connection); 159 } 160 #endif 161 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 162 run_loop_add_timer(timer); 163 } 164 165 static void hci_connection_timestamp(hci_connection_t *connection){ 166 #ifdef HAVE_TIME 167 gettimeofday(&connection->timestamp, NULL); 168 #endif 169 #ifdef HAVE_TICK 170 connection->timestamp = embedded_get_ticks(); 171 #endif 172 } 173 174 175 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 176 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 177 } 178 179 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 180 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 181 } 182 183 184 /** 185 * add authentication flags and reset timer 186 * @note: assumes classic connection 187 */ 188 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 189 bd_addr_t addr; 190 bt_flip_addr(addr, *(bd_addr_t *) bd_addr); 191 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 192 if (conn) { 193 connectionSetAuthenticationFlags(conn, flags); 194 hci_connection_timestamp(conn); 195 } 196 } 197 198 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 199 hci_connection_t * conn = hci_connection_for_handle(handle); 200 if (!conn) return 0; 201 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 202 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 203 return 0; 204 } 205 206 void hci_drop_link_key_for_bd_addr(bd_addr_t *addr){ 207 if (hci_stack->remote_device_db) { 208 hci_stack->remote_device_db->delete_link_key(addr); 209 } 210 } 211 212 int hci_is_le_connection(hci_connection_t * connection){ 213 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 214 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 215 } 216 217 218 /** 219 * count connections 220 */ 221 static int nr_hci_connections(void){ 222 int count = 0; 223 linked_item_t *it; 224 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 225 return count; 226 } 227 228 /** 229 * Dummy handler called by HCI 230 */ 231 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 232 } 233 234 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 235 hci_connection_t * connection = hci_connection_for_handle(handle); 236 if (!connection) { 237 log_error("hci_number_outgoing_packets connectino for handle %u does not exist!\n", handle); 238 return 0; 239 } 240 return connection->num_acl_packets_sent; 241 } 242 243 uint8_t hci_number_free_acl_slots(){ 244 uint8_t free_slots = hci_stack->total_num_acl_packets; 245 linked_item_t *it; 246 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 247 hci_connection_t * connection = (hci_connection_t *) it; 248 if (free_slots < connection->num_acl_packets_sent) { 249 log_error("hci_number_free_acl_slots: sum of outgoing packets > total acl packets!\n"); 250 return 0; 251 } 252 free_slots -= connection->num_acl_packets_sent; 253 } 254 return free_slots; 255 } 256 257 int hci_can_send_packet_now(uint8_t packet_type){ 258 259 // check for async hci transport implementations 260 if (hci_stack->hci_transport->can_send_packet_now){ 261 if (!hci_stack->hci_transport->can_send_packet_now(packet_type)){ 262 return 0; 263 } 264 } 265 266 // check regular Bluetooth flow control 267 switch (packet_type) { 268 case HCI_ACL_DATA_PACKET: 269 return hci_number_free_acl_slots(); 270 case HCI_COMMAND_DATA_PACKET: 271 return hci_stack->num_cmd_packets; 272 default: 273 return 0; 274 } 275 } 276 277 // same as hci_can_send_packet_now, but also checks if packet buffer is free for use 278 int hci_can_send_packet_now_using_packet_buffer(uint8_t packet_type){ 279 if (hci_stack->hci_packet_buffer_reserved) return 0; 280 return hci_can_send_packet_now(packet_type); 281 } 282 283 // used for internal checks in l2cap[-le].c 284 int hci_is_packet_buffer_reserved(void){ 285 return hci_stack->hci_packet_buffer_reserved; 286 } 287 288 // reserves outgoing packet buffer. @returns 1 if successful 289 int hci_reserve_packet_buffer(void){ 290 if (hci_stack->hci_packet_buffer_reserved) return 0; 291 hci_stack->hci_packet_buffer_reserved = 1; 292 return 1; 293 } 294 295 void hci_release_packet_buffer(void){ 296 hci_stack->hci_packet_buffer_reserved = 0; 297 } 298 299 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 300 int hci_transport_synchronous(void){ 301 return hci_stack->hci_transport->can_send_packet_now == NULL; 302 } 303 304 int hci_send_acl_packet(uint8_t *packet, int size){ 305 306 // check for free places on BT module 307 if (!hci_number_free_acl_slots()) { 308 hci_release_packet_buffer(); 309 return BTSTACK_ACL_BUFFERS_FULL; 310 } 311 312 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 313 hci_connection_t *connection = hci_connection_for_handle( con_handle); 314 if (!connection) { 315 hci_release_packet_buffer(); 316 return 0; 317 } 318 hci_connection_timestamp(connection); 319 320 // count packet 321 connection->num_acl_packets_sent++; 322 // log_info("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 323 324 // send packet 325 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 326 327 // free packet buffer for synchronous transport implementations 328 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 329 hci_release_packet_buffer(); 330 } 331 332 return err; 333 } 334 335 static void acl_handler(uint8_t *packet, int size){ 336 337 // log_info("acl_handler: size %u", size); 338 339 // get info 340 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 341 hci_connection_t *conn = hci_connection_for_handle(con_handle); 342 uint8_t acl_flags = READ_ACL_FLAGS(packet); 343 uint16_t acl_length = READ_ACL_LENGTH(packet); 344 345 // ignore non-registered handle 346 if (!conn){ 347 log_error( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 348 return; 349 } 350 351 // assert packet is complete 352 if (acl_length + 4 != size){ 353 log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4); 354 return; 355 } 356 357 // update idle timestamp 358 hci_connection_timestamp(conn); 359 360 // handle different packet types 361 switch (acl_flags & 0x03) { 362 363 case 0x01: // continuation fragment 364 365 // sanity check 366 if (conn->acl_recombination_pos == 0) { 367 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 368 return; 369 } 370 371 // append fragment payload (header already stored) 372 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 373 conn->acl_recombination_pos += acl_length; 374 375 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", acl_length, 376 // conn->acl_recombination_pos, conn->acl_recombination_length); 377 378 // forward complete L2CAP packet if complete. 379 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 380 381 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 382 // reset recombination buffer 383 conn->acl_recombination_length = 0; 384 conn->acl_recombination_pos = 0; 385 } 386 break; 387 388 case 0x02: { // first fragment 389 390 // sanity check 391 if (conn->acl_recombination_pos) { 392 log_error( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 393 return; 394 } 395 396 // peek into L2CAP packet! 397 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 398 399 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 400 401 // compare fragment size to L2CAP packet size 402 if (acl_length >= l2cap_length + 4){ 403 404 // forward fragment as L2CAP packet 405 hci_stack->packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 406 407 } else { 408 // store first fragment and tweak acl length for complete package 409 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 410 conn->acl_recombination_pos = acl_length + 4; 411 conn->acl_recombination_length = l2cap_length; 412 bt_store_16(conn->acl_recombination_buffer, 2, l2cap_length +4); 413 } 414 break; 415 416 } 417 default: 418 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 419 return; 420 } 421 422 // execute main loop 423 hci_run(); 424 } 425 426 static void hci_shutdown_connection(hci_connection_t *conn){ 427 log_info("Connection closed: handle 0x%x, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 428 429 run_loop_remove_timer(&conn->timeout); 430 431 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 432 btstack_memory_hci_connection_free( conn ); 433 434 // now it's gone 435 hci_emit_nr_connections_changed(); 436 } 437 438 static const uint16_t packet_type_sizes[] = { 439 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 440 HCI_ACL_DH1_SIZE, 0, 0, 0, 441 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 442 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 443 }; 444 static const uint8_t packet_type_feature_requirement_bit[] = { 445 0, // 3 slot packets 446 1, // 5 slot packets 447 25, // EDR 2 mpbs 448 26, // EDR 3 mbps 449 39, // 3 slot EDR packts 450 40, // 5 slot EDR packet 451 }; 452 static const uint16_t packet_type_feature_packet_mask[] = { 453 0x0f00, // 3 slot packets 454 0xf000, // 5 slot packets 455 0x1102, // EDR 2 mpbs 456 0x2204, // EDR 3 mbps 457 0x0300, // 3 slot EDR packts 458 0x3000, // 5 slot EDR packet 459 }; 460 461 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 462 // enable packet types based on size 463 uint16_t packet_types = 0; 464 int i; 465 for (i=0;i<16;i++){ 466 if (packet_type_sizes[i] == 0) continue; 467 if (packet_type_sizes[i] <= buffer_size){ 468 packet_types |= 1 << i; 469 } 470 } 471 // disable packet types due to missing local supported features 472 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 473 int bit_idx = packet_type_feature_requirement_bit[i]; 474 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 475 if (feature_set) continue; 476 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 477 packet_types &= ~packet_type_feature_packet_mask[i]; 478 } 479 // flip bits for "may not be used" 480 packet_types ^= 0x3306; 481 return packet_types; 482 } 483 484 uint16_t hci_usable_acl_packet_types(void){ 485 return hci_stack->packet_types; 486 } 487 488 uint8_t* hci_get_outgoing_packet_buffer(void){ 489 // hci packet buffer is >= acl data packet length 490 return hci_stack->hci_packet_buffer; 491 } 492 493 uint16_t hci_max_acl_data_packet_length(void){ 494 return hci_stack->acl_data_packet_length; 495 } 496 497 int hci_non_flushable_packet_boundary_flag_supported(void){ 498 // No. 54, byte 6, bit 6 499 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 500 } 501 502 int hci_ssp_supported(void){ 503 // No. 51, byte 6, bit 3 504 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 505 } 506 507 int hci_classic_supported(void){ 508 // No. 37, byte 4, bit 5, = No BR/EDR Support 509 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 510 } 511 512 int hci_le_supported(void){ 513 #ifdef HAVE_BLE 514 // No. 37, byte 4, bit 6 = LE Supported (Controller) 515 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 516 #else 517 return 0; 518 #endif 519 } 520 521 // get addr type and address used in advertisement packets 522 void hci_le_advertisement_address(uint8_t * addr_type, bd_addr_t * addr){ 523 *addr_type = hci_stack->adv_addr_type; 524 if (hci_stack->adv_addr_type){ 525 memcpy(addr, hci_stack->adv_address, 6); 526 } else { 527 memcpy(addr, hci_stack->local_bd_addr, 6); 528 } 529 } 530 531 #ifdef HAVE_BLE 532 void le_handle_advertisement_report(uint8_t *packet, int size){ 533 int num_reports = packet[3]; 534 int i; 535 int total_data_length = 0; 536 int data_offset = 0; 537 538 for (i=0; i<num_reports;i++){ 539 total_data_length += packet[4+num_reports*8+i]; 540 } 541 542 for (i=0; i<num_reports;i++){ 543 int pos = 0; 544 uint8_t data_length = packet[4+num_reports*8+i]; 545 uint8_t event_size = 10 + data_length; 546 uint8_t event[2 + event_size ]; 547 event[pos++] = GAP_LE_ADVERTISING_REPORT; 548 event[pos++] = event_size; 549 event[pos++] = packet[4+i]; // event_type; 550 event[pos++] = packet[4+num_reports+i]; // address_type; 551 memcpy(&event[pos], &packet[4+num_reports*2+i*6], 6); // bt address 552 pos += 6; 553 event[pos++] = packet[4+num_reports*9+total_data_length + i]; 554 event[pos++] = data_length; 555 memcpy(&event[pos], &packet[4+num_reports*9+data_offset], data_length); 556 data_offset += data_length; 557 pos += data_length; 558 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 559 } 560 } 561 #endif 562 563 // avoid huge local variables 564 #ifndef EMBEDDED 565 static device_name_t device_name; 566 #endif 567 static void event_handler(uint8_t *packet, int size){ 568 569 uint16_t event_length = packet[1]; 570 571 // assert packet is complete 572 if (size != event_length + 2){ 573 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 574 return; 575 } 576 577 bd_addr_t addr; 578 bd_addr_type_t addr_type; 579 uint8_t link_type; 580 hci_con_handle_t handle; 581 hci_connection_t * conn; 582 int i; 583 584 // printf("HCI:EVENT:%02x\n", packet[0]); 585 586 switch (packet[0]) { 587 588 case HCI_EVENT_COMMAND_COMPLETE: 589 // get num cmd packets 590 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack->num_cmd_packets, packet[2]); 591 hci_stack->num_cmd_packets = packet[2]; 592 593 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 594 // from offset 5 595 // status 596 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 597 hci_stack->acl_data_packet_length = READ_BT_16(packet, 6); 598 // ignore: SCO data packet len (8) 599 hci_stack->total_num_acl_packets = packet[9]; 600 // ignore: total num SCO packets 601 if (hci_stack->state == HCI_STATE_INITIALIZING){ 602 // determine usable ACL payload size 603 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 604 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 605 } 606 log_info("hci_read_buffer_size: used size %u, count %u\n", 607 hci_stack->acl_data_packet_length, hci_stack->total_num_acl_packets); 608 } 609 } 610 #ifdef HAVE_BLE 611 if (COMMAND_COMPLETE_EVENT(packet, hci_le_read_buffer_size)){ 612 hci_stack->le_data_packet_length = READ_BT_16(packet, 6); 613 hci_stack->total_num_le_packets = packet[8]; 614 log_info("hci_le_read_buffer_size: size %u, count %u\n", hci_stack->le_data_packet_length, hci_stack->total_num_le_packets); 615 616 // use LE buffers if no clasic buffers have been reported 617 if (hci_stack->total_num_acl_packets == 0){ 618 log_info("use le buffers instead of classic ones"); 619 hci_stack->total_num_acl_packets = hci_stack->total_num_le_packets; 620 hci_stack->acl_data_packet_length = hci_stack->le_data_packet_length; 621 // determine usable ACL payload size 622 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 623 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 624 } 625 } 626 } 627 #endif 628 // Dump local address 629 if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)) { 630 bt_flip_addr(hci_stack->local_bd_addr, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1]); 631 log_info("Local Address, Status: 0x%02x: Addr: %s\n", 632 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 633 } 634 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 635 hci_emit_discoverable_enabled(hci_stack->discoverable); 636 } 637 // Note: HCI init checks 638 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_features)){ 639 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 640 log_info("Local Supported Features: 0x%02x%02x%02x%02x%02x%02x%02x%02x", 641 hci_stack->local_supported_features[0], hci_stack->local_supported_features[1], 642 hci_stack->local_supported_features[2], hci_stack->local_supported_features[3], 643 hci_stack->local_supported_features[4], hci_stack->local_supported_features[5], 644 hci_stack->local_supported_features[6], hci_stack->local_supported_features[7]); 645 646 // determine usable ACL packet types based buffer size and supported features 647 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]); 648 log_info("packet types %04x", hci_stack->packet_types); 649 650 // Classic/LE 651 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 652 } 653 break; 654 655 case HCI_EVENT_COMMAND_STATUS: 656 // get num cmd packets 657 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack->num_cmd_packets, packet[3]); 658 hci_stack->num_cmd_packets = packet[3]; 659 break; 660 661 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 662 for (i=0; i<packet[2];i++){ 663 handle = READ_BT_16(packet, 3 + 2*i); 664 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 665 conn = hci_connection_for_handle(handle); 666 if (!conn){ 667 log_error("hci_number_completed_packet lists unused con handle %u\n", handle); 668 continue; 669 } 670 conn->num_acl_packets_sent -= num_packets; 671 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 672 } 673 break; 674 675 case HCI_EVENT_CONNECTION_REQUEST: 676 bt_flip_addr(addr, &packet[2]); 677 // TODO: eval COD 8-10 678 link_type = packet[11]; 679 log_info("Connection_incoming: %s, type %u\n", bd_addr_to_str(addr), link_type); 680 if (link_type == 1) { // ACL 681 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 682 if (!conn) { 683 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 684 } 685 if (!conn) { 686 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 687 hci_stack->decline_reason = 0x0d; 688 BD_ADDR_COPY(hci_stack->decline_addr, addr); 689 break; 690 } 691 conn->state = RECEIVED_CONNECTION_REQUEST; 692 hci_run(); 693 } else { 694 // SYNCHRONOUS CONNECTION LIMIT TO A DEVICE EXCEEDED (0X0A) 695 hci_stack->decline_reason = 0x0a; 696 BD_ADDR_COPY(hci_stack->decline_addr, addr); 697 } 698 break; 699 700 case HCI_EVENT_CONNECTION_COMPLETE: 701 // Connection management 702 bt_flip_addr(addr, &packet[5]); 703 log_info("Connection_complete (status=%u) %s\n", packet[2], bd_addr_to_str(addr)); 704 addr_type = BD_ADDR_TYPE_CLASSIC; 705 conn = hci_connection_for_bd_addr_and_type(&addr, addr_type); 706 if (conn) { 707 if (!packet[2]){ 708 conn->state = OPEN; 709 conn->con_handle = READ_BT_16(packet, 3); 710 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 711 712 // restart timer 713 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 714 run_loop_add_timer(&conn->timeout); 715 716 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 717 718 hci_emit_nr_connections_changed(); 719 } else { 720 // notify client if dedicated bonding 721 if (conn->bonding_flags & BONDING_DEDICATED){ 722 hci_emit_dedicated_bonding_result(conn, packet[2]); 723 } 724 725 // connection failed, remove entry 726 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 727 btstack_memory_hci_connection_free( conn ); 728 729 // if authentication error, also delete link key 730 if (packet[2] == 0x05) { 731 hci_drop_link_key_for_bd_addr(&addr); 732 } 733 } 734 } 735 break; 736 737 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 738 handle = READ_BT_16(packet, 3); 739 conn = hci_connection_for_handle(handle); 740 if (!conn) break; 741 if (!packet[2]){ 742 uint8_t * features = &packet[5]; 743 if (features[6] & (1 << 3)){ 744 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 745 } 746 } 747 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 748 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x", conn->bonding_flags); 749 if (conn->bonding_flags & BONDING_DEDICATED){ 750 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 751 } 752 break; 753 754 case HCI_EVENT_LINK_KEY_REQUEST: 755 log_info("HCI_EVENT_LINK_KEY_REQUEST\n"); 756 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 757 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 758 if (hci_stack->bondable && !hci_stack->remote_device_db) break; 759 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 760 hci_run(); 761 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 762 return; 763 764 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 765 bt_flip_addr(addr, &packet[2]); 766 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 767 if (!conn) break; 768 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 769 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 770 // Change Connection Encryption keeps link key type 771 if (link_key_type != CHANGED_COMBINATION_KEY){ 772 conn->link_key_type = link_key_type; 773 } 774 if (!hci_stack->remote_device_db) break; 775 hci_stack->remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8], conn->link_key_type); 776 // still forward event to allow dismiss of pairing dialog 777 break; 778 } 779 780 case HCI_EVENT_PIN_CODE_REQUEST: 781 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 782 // non-bondable mode: pin code negative reply will be sent 783 if (!hci_stack->bondable){ 784 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 785 hci_run(); 786 return; 787 } 788 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 789 if (!hci_stack->remote_device_db) break; 790 bt_flip_addr(addr, &packet[2]); 791 hci_stack->remote_device_db->delete_link_key(&addr); 792 break; 793 794 case HCI_EVENT_IO_CAPABILITY_REQUEST: 795 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 796 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 797 break; 798 799 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 800 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 801 if (!hci_stack->ssp_auto_accept) break; 802 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 803 break; 804 805 case HCI_EVENT_USER_PASSKEY_REQUEST: 806 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 807 if (!hci_stack->ssp_auto_accept) break; 808 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 809 break; 810 811 case HCI_EVENT_ENCRYPTION_CHANGE: 812 handle = READ_BT_16(packet, 3); 813 conn = hci_connection_for_handle(handle); 814 if (!conn) break; 815 if (packet[2] == 0) { 816 if (packet[5]){ 817 conn->authentication_flags |= CONNECTION_ENCRYPTED; 818 } else { 819 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 820 } 821 } 822 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 823 break; 824 825 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 826 handle = READ_BT_16(packet, 3); 827 conn = hci_connection_for_handle(handle); 828 if (!conn) break; 829 830 // dedicated bonding: send result and disconnect 831 if (conn->bonding_flags & BONDING_DEDICATED){ 832 conn->bonding_flags &= ~BONDING_DEDICATED; 833 hci_emit_dedicated_bonding_result( conn, packet[2]); 834 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 835 break; 836 } 837 838 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 839 // link key sufficient for requested security 840 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 841 break; 842 } 843 // not enough 844 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 845 break; 846 847 #ifndef EMBEDDED 848 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 849 if (!hci_stack->remote_device_db) break; 850 if (packet[2]) break; // status not ok 851 bt_flip_addr(addr, &packet[3]); 852 // fix for invalid remote names - terminate on 0xff 853 for (i=0; i<248;i++){ 854 if (packet[9+i] == 0xff){ 855 packet[9+i] = 0; 856 break; 857 } 858 } 859 memset(&device_name, 0, sizeof(device_name_t)); 860 strncpy((char*) device_name, (char*) &packet[9], 248); 861 hci_stack->remote_device_db->put_name(&addr, &device_name); 862 break; 863 864 case HCI_EVENT_INQUIRY_RESULT: 865 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 866 if (!hci_stack->remote_device_db) break; 867 // first send inq result packet 868 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 869 // then send cached remote names 870 for (i=0; i<packet[2];i++){ 871 bt_flip_addr(addr, &packet[3+i*6]); 872 if (hci_stack->remote_device_db->get_name(&addr, &device_name)){ 873 hci_emit_remote_name_cached(&addr, &device_name); 874 } 875 } 876 return; 877 #endif 878 879 case HCI_EVENT_DISCONNECTION_COMPLETE: 880 if (!packet[2]){ 881 handle = READ_BT_16(packet, 3); 882 hci_connection_t * conn = hci_connection_for_handle(handle); 883 if (conn) { 884 hci_shutdown_connection(conn); 885 } 886 } 887 break; 888 889 case HCI_EVENT_HARDWARE_ERROR: 890 if(hci_stack->control && hci_stack->control->hw_error){ 891 (*hci_stack->control->hw_error)(); 892 } else { 893 // if no special requests, just reboot stack 894 hci_power_control_off(); 895 hci_power_control_on(); 896 } 897 break; 898 899 case DAEMON_EVENT_HCI_PACKET_SENT: 900 // free packet buffer for asynchronous transport 901 if (hci_transport_synchronous()) break; 902 hci_stack->hci_packet_buffer_reserved = 0; 903 break; 904 905 #ifdef HAVE_BLE 906 case HCI_EVENT_LE_META: 907 switch (packet[2]){ 908 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 909 if (hci_stack->le_scanning_state != LE_SCANNING) break; 910 le_handle_advertisement_report(packet, size); 911 break; 912 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 913 // Connection management 914 bt_flip_addr(addr, &packet[8]); 915 addr_type = (bd_addr_type_t)packet[7]; 916 log_info("LE Connection_complete (status=%u) type %u, %s\n", packet[3], addr_type, bd_addr_to_str(addr)); 917 // LE connections are auto-accepted, so just create a connection if there isn't one already 918 conn = hci_connection_for_bd_addr_and_type(&addr, addr_type); 919 if (packet[3]){ 920 if (conn){ 921 // outgoing connection failed, remove entry 922 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 923 btstack_memory_hci_connection_free( conn ); 924 } 925 // if authentication error, also delete link key 926 if (packet[3] == 0x05) { 927 hci_drop_link_key_for_bd_addr(&addr); 928 } 929 break; 930 } 931 if (!conn){ 932 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 933 } 934 if (!conn){ 935 // no memory 936 break; 937 } 938 939 conn->state = OPEN; 940 conn->con_handle = READ_BT_16(packet, 4); 941 942 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 943 944 // restart timer 945 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 946 // run_loop_add_timer(&conn->timeout); 947 948 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 949 950 hci_emit_nr_connections_changed(); 951 break; 952 953 // printf("LE buffer size: %u, count %u\n", READ_BT_16(packet,6), packet[8]); 954 955 default: 956 break; 957 } 958 break; 959 #endif 960 default: 961 break; 962 } 963 964 // handle BT initialization 965 if (hci_stack->state == HCI_STATE_INITIALIZING){ 966 if (hci_stack->substate % 2){ 967 // odd: waiting for event 968 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE || packet[0] == HCI_EVENT_COMMAND_STATUS){ 969 // wait for explicit COMMAND COMPLETE on RESET 970 if (hci_stack->substate > 1 || COMMAND_COMPLETE_EVENT(packet, hci_reset)) { 971 hci_stack->substate++; 972 } 973 } 974 975 // HACK to deal with duplicate HCI Reset Complete events seen on cheapo CSR8510 A10 USB Dongle 976 if (COMMAND_COMPLETE_EVENT(packet, hci_reset)){ 977 if (hci_stack->state == HCI_STATE_INITIALIZING) { 978 if (hci_stack->config == 0 || ((hci_uart_config_t *)hci_stack->config)->baudrate_main == 0){ 979 hci_stack->substate = 6; // >> 1 = 3 980 } else { 981 hci_stack->substate = 2; // >> 1 = 1 982 } 983 } 984 } 985 } 986 } 987 988 // help with BT sleep 989 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 990 && hci_stack->substate == 1 991 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 992 hci_stack->substate++; 993 } 994 995 hci_stack->packet_handler(HCI_EVENT_PACKET, packet, size); 996 997 // execute main loop 998 hci_run(); 999 } 1000 1001 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 1002 switch (packet_type) { 1003 case HCI_EVENT_PACKET: 1004 event_handler(packet, size); 1005 break; 1006 case HCI_ACL_DATA_PACKET: 1007 acl_handler(packet, size); 1008 break; 1009 default: 1010 break; 1011 } 1012 } 1013 1014 /** Register HCI packet handlers */ 1015 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 1016 hci_stack->packet_handler = handler; 1017 } 1018 1019 void hci_state_reset(){ 1020 // no connections yet 1021 hci_stack->connections = NULL; 1022 1023 // keep discoverable/connectable as this has been requested by the client(s) 1024 // hci_stack->discoverable = 0; 1025 // hci_stack->connectable = 0; 1026 // hci_stack->bondable = 1; 1027 1028 // buffer is free 1029 hci_stack->hci_packet_buffer_reserved = 0; 1030 1031 // no pending cmds 1032 hci_stack->decline_reason = 0; 1033 hci_stack->new_scan_enable_value = 0xff; 1034 1035 // LE 1036 hci_stack->adv_addr_type = 0; 1037 memset(hci_stack->adv_address, 0, 6); 1038 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1039 hci_stack->le_scan_type = 0xff; 1040 } 1041 1042 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 1043 1044 #ifdef HAVE_MALLOC 1045 if (!hci_stack) { 1046 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 1047 } 1048 #else 1049 hci_stack = &hci_stack_static; 1050 #endif 1051 memset(hci_stack, 0, sizeof(hci_stack_t)); 1052 1053 // reference to use transport layer implementation 1054 hci_stack->hci_transport = transport; 1055 1056 // references to used control implementation 1057 hci_stack->control = control; 1058 1059 // reference to used config 1060 hci_stack->config = config; 1061 1062 // higher level handler 1063 hci_stack->packet_handler = dummy_handler; 1064 1065 // store and open remote device db 1066 hci_stack->remote_device_db = remote_device_db; 1067 if (hci_stack->remote_device_db) { 1068 hci_stack->remote_device_db->open(); 1069 } 1070 1071 // max acl payload size defined in config.h 1072 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1073 1074 // register packet handlers with transport 1075 transport->register_packet_handler(&packet_handler); 1076 1077 hci_stack->state = HCI_STATE_OFF; 1078 1079 // class of device 1080 hci_stack->class_of_device = 0x007a020c; // Smartphone 1081 1082 // bondable by default 1083 hci_stack->bondable = 1; 1084 1085 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 1086 hci_stack->ssp_enable = 1; 1087 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 1088 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 1089 hci_stack->ssp_auto_accept = 1; 1090 1091 hci_state_reset(); 1092 } 1093 1094 void hci_close(){ 1095 // close remote device db 1096 if (hci_stack->remote_device_db) { 1097 hci_stack->remote_device_db->close(); 1098 } 1099 while (hci_stack->connections) { 1100 // cancel all l2cap connections 1101 hci_emit_disconnection_complete(((hci_connection_t *) hci_stack->connections)->con_handle, 0x16); // terminated by local host 1102 hci_shutdown_connection((hci_connection_t *) hci_stack->connections); 1103 } 1104 hci_power_control(HCI_POWER_OFF); 1105 1106 #ifdef HAVE_MALLOC 1107 free(hci_stack); 1108 #endif 1109 hci_stack = NULL; 1110 } 1111 1112 void hci_set_class_of_device(uint32_t class_of_device){ 1113 hci_stack->class_of_device = class_of_device; 1114 } 1115 1116 void hci_disable_l2cap_timeout_check(){ 1117 disable_l2cap_timeouts = 1; 1118 } 1119 // State-Module-Driver overview 1120 // state module low-level 1121 // HCI_STATE_OFF off close 1122 // HCI_STATE_INITIALIZING, on open 1123 // HCI_STATE_WORKING, on open 1124 // HCI_STATE_HALTING, on open 1125 // HCI_STATE_SLEEPING, off/sleep close 1126 // HCI_STATE_FALLING_ASLEEP on open 1127 1128 static int hci_power_control_on(void){ 1129 1130 // power on 1131 int err = 0; 1132 if (hci_stack->control && hci_stack->control->on){ 1133 err = (*hci_stack->control->on)(hci_stack->config); 1134 } 1135 if (err){ 1136 log_error( "POWER_ON failed\n"); 1137 hci_emit_hci_open_failed(); 1138 return err; 1139 } 1140 1141 // open low-level device 1142 err = hci_stack->hci_transport->open(hci_stack->config); 1143 if (err){ 1144 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 1145 if (hci_stack->control && hci_stack->control->off){ 1146 (*hci_stack->control->off)(hci_stack->config); 1147 } 1148 hci_emit_hci_open_failed(); 1149 return err; 1150 } 1151 return 0; 1152 } 1153 1154 static void hci_power_control_off(void){ 1155 1156 log_info("hci_power_control_off\n"); 1157 1158 // close low-level device 1159 hci_stack->hci_transport->close(hci_stack->config); 1160 1161 log_info("hci_power_control_off - hci_transport closed\n"); 1162 1163 // power off 1164 if (hci_stack->control && hci_stack->control->off){ 1165 (*hci_stack->control->off)(hci_stack->config); 1166 } 1167 1168 log_info("hci_power_control_off - control closed\n"); 1169 1170 hci_stack->state = HCI_STATE_OFF; 1171 } 1172 1173 static void hci_power_control_sleep(void){ 1174 1175 log_info("hci_power_control_sleep\n"); 1176 1177 #if 0 1178 // don't close serial port during sleep 1179 1180 // close low-level device 1181 hci_stack->hci_transport->close(hci_stack->config); 1182 #endif 1183 1184 // sleep mode 1185 if (hci_stack->control && hci_stack->control->sleep){ 1186 (*hci_stack->control->sleep)(hci_stack->config); 1187 } 1188 1189 hci_stack->state = HCI_STATE_SLEEPING; 1190 } 1191 1192 static int hci_power_control_wake(void){ 1193 1194 log_info("hci_power_control_wake\n"); 1195 1196 // wake on 1197 if (hci_stack->control && hci_stack->control->wake){ 1198 (*hci_stack->control->wake)(hci_stack->config); 1199 } 1200 1201 #if 0 1202 // open low-level device 1203 int err = hci_stack->hci_transport->open(hci_stack->config); 1204 if (err){ 1205 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 1206 if (hci_stack->control && hci_stack->control->off){ 1207 (*hci_stack->control->off)(hci_stack->config); 1208 } 1209 hci_emit_hci_open_failed(); 1210 return err; 1211 } 1212 #endif 1213 1214 return 0; 1215 } 1216 1217 static void hci_power_transition_to_initializing(void){ 1218 // set up state machine 1219 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 1220 hci_stack->hci_packet_buffer_reserved = 0; 1221 hci_stack->state = HCI_STATE_INITIALIZING; 1222 hci_stack->substate = 0; 1223 } 1224 1225 int hci_power_control(HCI_POWER_MODE power_mode){ 1226 1227 log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack->state); 1228 1229 int err = 0; 1230 switch (hci_stack->state){ 1231 1232 case HCI_STATE_OFF: 1233 switch (power_mode){ 1234 case HCI_POWER_ON: 1235 err = hci_power_control_on(); 1236 if (err) { 1237 log_error("hci_power_control_on() error %u", err); 1238 return err; 1239 } 1240 hci_power_transition_to_initializing(); 1241 break; 1242 case HCI_POWER_OFF: 1243 // do nothing 1244 break; 1245 case HCI_POWER_SLEEP: 1246 // do nothing (with SLEEP == OFF) 1247 break; 1248 } 1249 break; 1250 1251 case HCI_STATE_INITIALIZING: 1252 switch (power_mode){ 1253 case HCI_POWER_ON: 1254 // do nothing 1255 break; 1256 case HCI_POWER_OFF: 1257 // no connections yet, just turn it off 1258 hci_power_control_off(); 1259 break; 1260 case HCI_POWER_SLEEP: 1261 // no connections yet, just turn it off 1262 hci_power_control_sleep(); 1263 break; 1264 } 1265 break; 1266 1267 case HCI_STATE_WORKING: 1268 switch (power_mode){ 1269 case HCI_POWER_ON: 1270 // do nothing 1271 break; 1272 case HCI_POWER_OFF: 1273 // see hci_run 1274 hci_stack->state = HCI_STATE_HALTING; 1275 break; 1276 case HCI_POWER_SLEEP: 1277 // see hci_run 1278 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 1279 hci_stack->substate = 0; 1280 break; 1281 } 1282 break; 1283 1284 case HCI_STATE_HALTING: 1285 switch (power_mode){ 1286 case HCI_POWER_ON: 1287 hci_power_transition_to_initializing(); 1288 break; 1289 case HCI_POWER_OFF: 1290 // do nothing 1291 break; 1292 case HCI_POWER_SLEEP: 1293 // see hci_run 1294 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 1295 hci_stack->substate = 0; 1296 break; 1297 } 1298 break; 1299 1300 case HCI_STATE_FALLING_ASLEEP: 1301 switch (power_mode){ 1302 case HCI_POWER_ON: 1303 1304 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1305 // nothing to do, if H4 supports power management 1306 if (bt_control_iphone_power_management_enabled()){ 1307 hci_stack->state = HCI_STATE_INITIALIZING; 1308 hci_stack->substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1309 break; 1310 } 1311 #endif 1312 hci_power_transition_to_initializing(); 1313 break; 1314 case HCI_POWER_OFF: 1315 // see hci_run 1316 hci_stack->state = HCI_STATE_HALTING; 1317 break; 1318 case HCI_POWER_SLEEP: 1319 // do nothing 1320 break; 1321 } 1322 break; 1323 1324 case HCI_STATE_SLEEPING: 1325 switch (power_mode){ 1326 case HCI_POWER_ON: 1327 1328 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1329 // nothing to do, if H4 supports power management 1330 if (bt_control_iphone_power_management_enabled()){ 1331 hci_stack->state = HCI_STATE_INITIALIZING; 1332 hci_stack->substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1333 hci_update_scan_enable(); 1334 break; 1335 } 1336 #endif 1337 err = hci_power_control_wake(); 1338 if (err) return err; 1339 hci_power_transition_to_initializing(); 1340 break; 1341 case HCI_POWER_OFF: 1342 hci_stack->state = HCI_STATE_HALTING; 1343 break; 1344 case HCI_POWER_SLEEP: 1345 // do nothing 1346 break; 1347 } 1348 break; 1349 } 1350 1351 // create internal event 1352 hci_emit_state(); 1353 1354 // trigger next/first action 1355 hci_run(); 1356 1357 return 0; 1358 } 1359 1360 static void hci_update_scan_enable(void){ 1361 // 2 = page scan, 1 = inq scan 1362 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 1363 hci_run(); 1364 } 1365 1366 void hci_discoverable_control(uint8_t enable){ 1367 if (enable) enable = 1; // normalize argument 1368 1369 if (hci_stack->discoverable == enable){ 1370 hci_emit_discoverable_enabled(hci_stack->discoverable); 1371 return; 1372 } 1373 1374 hci_stack->discoverable = enable; 1375 hci_update_scan_enable(); 1376 } 1377 1378 void hci_connectable_control(uint8_t enable){ 1379 if (enable) enable = 1; // normalize argument 1380 1381 // don't emit event 1382 if (hci_stack->connectable == enable) return; 1383 1384 hci_stack->connectable = enable; 1385 hci_update_scan_enable(); 1386 } 1387 1388 bd_addr_t * hci_local_bd_addr(void){ 1389 return &hci_stack->local_bd_addr; 1390 } 1391 1392 void hci_run(){ 1393 1394 hci_connection_t * connection; 1395 linked_item_t * it; 1396 1397 if (!hci_can_send_packet_now_using_packet_buffer(HCI_COMMAND_DATA_PACKET)) return; 1398 1399 // global/non-connection oriented commands 1400 1401 // decline incoming connections 1402 if (hci_stack->decline_reason){ 1403 uint8_t reason = hci_stack->decline_reason; 1404 hci_stack->decline_reason = 0; 1405 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 1406 return; 1407 } 1408 1409 // send scan enable 1410 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 1411 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1412 hci_stack->new_scan_enable_value = 0xff; 1413 return; 1414 } 1415 1416 #ifdef HAVE_BLE 1417 // handle le scan 1418 if (hci_stack->state == HCI_STATE_WORKING){ 1419 switch(hci_stack->le_scanning_state){ 1420 case LE_START_SCAN: 1421 hci_stack->le_scanning_state = LE_SCANNING; 1422 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 1423 return; 1424 1425 case LE_STOP_SCAN: 1426 hci_stack->le_scanning_state = LE_SCAN_IDLE; 1427 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 1428 return; 1429 default: 1430 break; 1431 } 1432 if (hci_stack->le_scan_type != 0xff){ 1433 // defaults: active scanning, accept all advertisement packets 1434 int scan_type = hci_stack->le_scan_type; 1435 hci_stack->le_scan_type = 0xff; 1436 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); 1437 return; 1438 } 1439 } 1440 #endif 1441 1442 // send pending HCI commands 1443 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 1444 connection = (hci_connection_t *) it; 1445 1446 switch(connection->state){ 1447 case SEND_CREATE_CONNECTION: 1448 switch(connection->address_type){ 1449 case BD_ADDR_TYPE_CLASSIC: 1450 log_info("sending hci_create_connection\n"); 1451 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 1452 break; 1453 default: 1454 #ifdef HAVE_BLE 1455 log_info("sending hci_le_create_connection\n"); 1456 hci_send_cmd(&hci_le_create_connection, 1457 0x0060, // scan interval: 60 ms 1458 0x0030, // scan interval: 30 ms 1459 0, // don't use whitelist 1460 connection->address_type, // peer address type 1461 connection->address, // peer bd addr 1462 hci_stack->adv_addr_type, // our addr type: 1463 0x0008, // conn interval min 1464 0x0018, // conn interval max 1465 0, // conn latency 1466 0x0048, // supervision timeout 1467 0x0001, // min ce length 1468 0x0001 // max ce length 1469 ); 1470 1471 connection->state = SENT_CREATE_CONNECTION; 1472 #endif 1473 break; 1474 } 1475 return; 1476 1477 case RECEIVED_CONNECTION_REQUEST: 1478 log_info("sending hci_accept_connection_request\n"); 1479 connection->state = ACCEPTED_CONNECTION_REQUEST; 1480 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 1481 return; 1482 1483 #ifdef HAVE_BLE 1484 case SEND_CANCEL_CONNECTION: 1485 connection->state = SENT_CANCEL_CONNECTION; 1486 hci_send_cmd(&hci_le_create_connection_cancel); 1487 return; 1488 #endif 1489 case SEND_DISCONNECT: 1490 connection->state = SENT_DISCONNECT; 1491 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1492 return; 1493 1494 default: 1495 break; 1496 } 1497 1498 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 1499 log_info("responding to link key request\n"); 1500 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 1501 link_key_t link_key; 1502 link_key_type_t link_key_type; 1503 if ( hci_stack->remote_device_db 1504 && hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type) 1505 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 1506 connection->link_key_type = link_key_type; 1507 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 1508 } else { 1509 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 1510 } 1511 return; 1512 } 1513 1514 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 1515 log_info("denying to pin request\n"); 1516 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 1517 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 1518 return; 1519 } 1520 1521 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 1522 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 1523 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 1524 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 1525 // tweak authentication requirements 1526 uint8_t authreq = hci_stack->ssp_authentication_requirement; 1527 if (connection->bonding_flags & BONDING_DEDICATED){ 1528 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 1529 } 1530 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 1531 authreq |= 1; 1532 } 1533 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 1534 } else { 1535 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 1536 } 1537 return; 1538 } 1539 1540 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 1541 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 1542 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 1543 return; 1544 } 1545 1546 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 1547 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 1548 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 1549 return; 1550 } 1551 1552 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 1553 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 1554 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 1555 return; 1556 } 1557 1558 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 1559 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 1560 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 1561 return; 1562 } 1563 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 1564 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 1565 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 1566 return; 1567 } 1568 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 1569 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 1570 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 1571 return; 1572 } 1573 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 1574 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 1575 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 1576 return; 1577 } 1578 } 1579 1580 switch (hci_stack->state){ 1581 case HCI_STATE_INITIALIZING: 1582 // log_info("hci_init: substate %u\n", hci_stack->substate); 1583 if (hci_stack->substate % 2) { 1584 // odd: waiting for command completion 1585 return; 1586 } 1587 switch (hci_stack->substate >> 1){ 1588 case 0: // RESET 1589 hci_state_reset(); 1590 1591 hci_send_cmd(&hci_reset); 1592 if (hci_stack->config == 0 || ((hci_uart_config_t *)hci_stack->config)->baudrate_main == 0){ 1593 // skip baud change 1594 hci_stack->substate = 4; // >> 1 = 2 1595 } 1596 break; 1597 case 1: // SEND BAUD CHANGE 1598 hci_stack->control->baudrate_cmd(hci_stack->config, ((hci_uart_config_t *)hci_stack->config)->baudrate_main, hci_stack->hci_packet_buffer); 1599 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1600 break; 1601 case 2: // LOCAL BAUD CHANGE 1602 log_info("Local baud rate change"); 1603 hci_stack->hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack->config)->baudrate_main); 1604 hci_stack->substate += 2; 1605 // break missing here for fall through 1606 1607 case 3: 1608 log_info("Custom init"); 1609 // Custom initialization 1610 if (hci_stack->control && hci_stack->control->next_cmd){ 1611 int valid_cmd = (*hci_stack->control->next_cmd)(hci_stack->config, hci_stack->hci_packet_buffer); 1612 if (valid_cmd){ 1613 int size = 3 + hci_stack->hci_packet_buffer[2]; 1614 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1615 hci_stack->substate = 4; // more init commands 1616 break; 1617 } 1618 log_info("hci_run: init script done\n\r"); 1619 } 1620 // otherwise continue 1621 hci_send_cmd(&hci_read_bd_addr); 1622 break; 1623 case 4: 1624 hci_send_cmd(&hci_read_buffer_size); 1625 break; 1626 case 5: 1627 hci_send_cmd(&hci_read_local_supported_features); 1628 break; 1629 case 6: 1630 if (hci_le_supported()){ 1631 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1632 } else { 1633 // Kensington Bluetoot 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1634 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1635 } 1636 1637 // skip Classic init commands for LE only chipsets 1638 if (!hci_classic_supported()){ 1639 if (hci_le_supported()){ 1640 hci_stack->substate = 11 << 1; // skip all classic command 1641 } else { 1642 log_error("Neither BR/EDR nor LE supported"); 1643 hci_stack->substate = 14 << 1; // skip all 1644 } 1645 } 1646 break; 1647 case 7: 1648 if (hci_ssp_supported()){ 1649 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1650 break; 1651 } 1652 hci_stack->substate += 2; 1653 // break missing here for fall through 1654 1655 case 8: 1656 // ca. 15 sec 1657 hci_send_cmd(&hci_write_page_timeout, 0x6000); 1658 break; 1659 case 9: 1660 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1661 break; 1662 case 10: 1663 if (hci_stack->local_name){ 1664 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1665 } else { 1666 char hostname[30]; 1667 #ifdef EMBEDDED 1668 // BTstack-11:22:33:44:55:66 1669 strcpy(hostname, "BTstack "); 1670 strcat(hostname, bd_addr_to_str(hci_stack->local_bd_addr)); 1671 printf("---> Name %s\n", hostname); 1672 #else 1673 // hostname for POSIX systems 1674 gethostname(hostname, 30); 1675 hostname[29] = '\0'; 1676 #endif 1677 hci_send_cmd(&hci_write_local_name, hostname); 1678 } 1679 break; 1680 case 11: 1681 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1682 if (!hci_le_supported()){ 1683 // SKIP LE init for Classic only configuration 1684 hci_stack->substate = 14 << 1; 1685 } 1686 break; 1687 1688 #ifdef HAVE_BLE 1689 // LE INIT 1690 case 12: 1691 hci_send_cmd(&hci_le_read_buffer_size); 1692 break; 1693 case 13: 1694 // LE Supported Host = 1, Simultaneous Host = 0 1695 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1696 break; 1697 case 14: 1698 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 1699 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 1700 break; 1701 #endif 1702 1703 // DONE 1704 case 15: 1705 // done. 1706 hci_stack->state = HCI_STATE_WORKING; 1707 hci_emit_state(); 1708 break; 1709 default: 1710 break; 1711 } 1712 hci_stack->substate++; 1713 break; 1714 1715 case HCI_STATE_HALTING: 1716 1717 log_info("HCI_STATE_HALTING\n"); 1718 // close all open connections 1719 connection = (hci_connection_t *) hci_stack->connections; 1720 if (connection){ 1721 1722 // send disconnect 1723 if (!hci_can_send_packet_now_using_packet_buffer(HCI_COMMAND_DATA_PACKET)) return; 1724 1725 log_info("HCI_STATE_HALTING, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1726 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1727 1728 // send disconnected event right away - causes higher layer connections to get closed, too. 1729 hci_shutdown_connection(connection); 1730 return; 1731 } 1732 log_info("HCI_STATE_HALTING, calling off\n"); 1733 1734 // switch mode 1735 hci_power_control_off(); 1736 1737 log_info("HCI_STATE_HALTING, emitting state\n"); 1738 hci_emit_state(); 1739 log_info("HCI_STATE_HALTING, done\n"); 1740 break; 1741 1742 case HCI_STATE_FALLING_ASLEEP: 1743 switch(hci_stack->substate) { 1744 case 0: 1745 log_info("HCI_STATE_FALLING_ASLEEP\n"); 1746 // close all open connections 1747 connection = (hci_connection_t *) hci_stack->connections; 1748 1749 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1750 // don't close connections, if H4 supports power management 1751 if (bt_control_iphone_power_management_enabled()){ 1752 connection = NULL; 1753 } 1754 #endif 1755 if (connection){ 1756 1757 // send disconnect 1758 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1759 1760 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1761 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1762 1763 // send disconnected event right away - causes higher layer connections to get closed, too. 1764 hci_shutdown_connection(connection); 1765 return; 1766 } 1767 1768 if (hci_classic_supported()){ 1769 // disable page and inquiry scan 1770 if (!hci_can_send_packet_now_using_packet_buffer(HCI_COMMAND_DATA_PACKET)) return; 1771 1772 log_info("HCI_STATE_HALTING, disabling inq scans\n"); 1773 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 1774 1775 // continue in next sub state 1776 hci_stack->substate++; 1777 break; 1778 } 1779 // fall through for ble-only chips 1780 1781 case 2: 1782 log_info("HCI_STATE_HALTING, calling sleep\n"); 1783 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1784 // don't actually go to sleep, if H4 supports power management 1785 if (bt_control_iphone_power_management_enabled()){ 1786 // SLEEP MODE reached 1787 hci_stack->state = HCI_STATE_SLEEPING; 1788 hci_emit_state(); 1789 break; 1790 } 1791 #endif 1792 // switch mode 1793 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 1794 hci_emit_state(); 1795 break; 1796 1797 default: 1798 break; 1799 } 1800 break; 1801 1802 default: 1803 break; 1804 } 1805 } 1806 1807 int hci_send_cmd_packet(uint8_t *packet, int size){ 1808 bd_addr_t addr; 1809 hci_connection_t * conn; 1810 // house-keeping 1811 1812 // create_connection? 1813 if (IS_COMMAND(packet, hci_create_connection)){ 1814 bt_flip_addr(addr, &packet[3]); 1815 log_info("Create_connection to %s\n", bd_addr_to_str(addr)); 1816 1817 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1818 if (!conn){ 1819 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1820 if (!conn){ 1821 // notify client that alloc failed 1822 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 1823 return 0; // don't sent packet to controller 1824 } 1825 conn->state = SEND_CREATE_CONNECTION; 1826 } 1827 log_info("conn state %u", conn->state); 1828 switch (conn->state){ 1829 // if connection active exists 1830 case OPEN: 1831 // and OPEN, emit connection complete command, don't send to controller 1832 hci_emit_connection_complete(conn, 0); 1833 return 0; 1834 case SEND_CREATE_CONNECTION: 1835 // connection created by hci, e.g. dedicated bonding 1836 break; 1837 default: 1838 // otherwise, just ignore as it is already in the open process 1839 return 0; 1840 } 1841 conn->state = SENT_CREATE_CONNECTION; 1842 } 1843 1844 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1845 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1846 } 1847 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1848 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1849 } 1850 1851 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1852 if (hci_stack->remote_device_db){ 1853 bt_flip_addr(addr, &packet[3]); 1854 hci_stack->remote_device_db->delete_link_key(&addr); 1855 } 1856 } 1857 1858 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 1859 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 1860 bt_flip_addr(addr, &packet[3]); 1861 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1862 if (conn){ 1863 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 1864 } 1865 } 1866 1867 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 1868 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 1869 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 1870 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 1871 bt_flip_addr(addr, &packet[3]); 1872 conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC); 1873 if (conn){ 1874 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 1875 } 1876 } 1877 1878 #ifdef HAVE_BLE 1879 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 1880 hci_stack->adv_addr_type = packet[8]; 1881 } 1882 if (IS_COMMAND(packet, hci_le_set_random_address)){ 1883 bt_flip_addr(hci_stack->adv_address, &packet[3]); 1884 } 1885 #endif 1886 1887 hci_stack->num_cmd_packets--; 1888 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1889 1890 // free packet buffer for synchronous transport implementations 1891 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 1892 hci_stack->hci_packet_buffer_reserved = 0; 1893 } 1894 1895 return err; 1896 } 1897 1898 // disconnect because of security block 1899 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 1900 hci_connection_t * connection = hci_connection_for_handle(con_handle); 1901 if (!connection) return; 1902 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 1903 } 1904 1905 1906 // Configure Secure Simple Pairing 1907 1908 // enable will enable SSP during init 1909 void hci_ssp_set_enable(int enable){ 1910 hci_stack->ssp_enable = enable; 1911 } 1912 1913 int hci_local_ssp_activated(){ 1914 return hci_ssp_supported() && hci_stack->ssp_enable; 1915 } 1916 1917 // if set, BTstack will respond to io capability request using authentication requirement 1918 void hci_ssp_set_io_capability(int io_capability){ 1919 hci_stack->ssp_io_capability = io_capability; 1920 } 1921 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 1922 hci_stack->ssp_authentication_requirement = authentication_requirement; 1923 } 1924 1925 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 1926 void hci_ssp_set_auto_accept(int auto_accept){ 1927 hci_stack->ssp_auto_accept = auto_accept; 1928 } 1929 1930 /** 1931 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1932 */ 1933 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1934 va_list argptr; 1935 va_start(argptr, cmd); 1936 uint16_t size = hci_create_cmd_internal(hci_stack->hci_packet_buffer, cmd, argptr); 1937 va_end(argptr); 1938 return hci_send_cmd_packet(hci_stack->hci_packet_buffer, size); 1939 } 1940 1941 // Create various non-HCI events. 1942 // TODO: generalize, use table similar to hci_create_command 1943 1944 void hci_emit_state(){ 1945 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 1946 uint8_t event[3]; 1947 event[0] = BTSTACK_EVENT_STATE; 1948 event[1] = sizeof(event) - 2; 1949 event[2] = hci_stack->state; 1950 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1951 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1952 } 1953 1954 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 1955 uint8_t event[13]; 1956 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1957 event[1] = sizeof(event) - 2; 1958 event[2] = status; 1959 bt_store_16(event, 3, conn->con_handle); 1960 bt_flip_addr(&event[5], conn->address); 1961 event[11] = 1; // ACL connection 1962 event[12] = 0; // encryption disabled 1963 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1964 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1965 } 1966 1967 void hci_emit_le_connection_complete(hci_connection_t *conn, uint8_t status){ 1968 uint8_t event[21]; 1969 event[0] = HCI_EVENT_LE_META; 1970 event[1] = sizeof(event) - 2; 1971 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 1972 event[3] = status; 1973 bt_store_16(event, 4, conn->con_handle); 1974 event[6] = 0; // TODO: role 1975 event[7] = conn->address_type; 1976 bt_flip_addr(&event[8], conn->address); 1977 bt_store_16(event, 14, 0); // interval 1978 bt_store_16(event, 16, 0); // latency 1979 bt_store_16(event, 18, 0); // supervision timeout 1980 event[20] = 0; // master clock accuracy 1981 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1982 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1983 } 1984 1985 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 1986 uint8_t event[6]; 1987 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1988 event[1] = sizeof(event) - 2; 1989 event[2] = 0; // status = OK 1990 bt_store_16(event, 3, handle); 1991 event[5] = reason; 1992 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1993 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1994 } 1995 1996 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1997 if (disable_l2cap_timeouts) return; 1998 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 1999 uint8_t event[4]; 2000 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 2001 event[1] = sizeof(event) - 2; 2002 bt_store_16(event, 2, conn->con_handle); 2003 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)); 2004 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2005 } 2006 2007 void hci_emit_nr_connections_changed(){ 2008 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 2009 uint8_t event[3]; 2010 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 2011 event[1] = sizeof(event) - 2; 2012 event[2] = nr_hci_connections(); 2013 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2014 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2015 } 2016 2017 void hci_emit_hci_open_failed(){ 2018 log_info("BTSTACK_EVENT_POWERON_FAILED"); 2019 uint8_t event[2]; 2020 event[0] = BTSTACK_EVENT_POWERON_FAILED; 2021 event[1] = sizeof(event) - 2; 2022 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2023 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2024 } 2025 2026 #ifndef EMBEDDED 2027 void hci_emit_btstack_version() { 2028 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 2029 uint8_t event[6]; 2030 event[0] = BTSTACK_EVENT_VERSION; 2031 event[1] = sizeof(event) - 2; 2032 event[2] = BTSTACK_MAJOR; 2033 event[3] = BTSTACK_MINOR; 2034 bt_store_16(event, 4, BTSTACK_REVISION); 2035 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2036 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2037 } 2038 #endif 2039 2040 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 2041 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 2042 uint8_t event[3]; 2043 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 2044 event[1] = sizeof(event) - 2; 2045 event[2] = enabled; 2046 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2047 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2048 } 2049 2050 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 2051 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 2052 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 2053 event[1] = sizeof(event) - 2 - 1; 2054 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 2055 bt_flip_addr(&event[3], *addr); 2056 memcpy(&event[9], name, 248); 2057 2058 event[9+248] = 0; // assert \0 for log_info 2059 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(*addr), &event[9]); 2060 2061 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 2062 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 2063 } 2064 2065 void hci_emit_discoverable_enabled(uint8_t enabled){ 2066 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 2067 uint8_t event[3]; 2068 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 2069 event[1] = sizeof(event) - 2; 2070 event[2] = enabled; 2071 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2072 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2073 } 2074 2075 void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 2076 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 2077 uint8_t event[5]; 2078 int pos = 0; 2079 event[pos++] = GAP_SECURITY_LEVEL; 2080 event[pos++] = sizeof(event) - 2; 2081 bt_store_16(event, 2, con_handle); 2082 pos += 2; 2083 event[pos++] = level; 2084 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2085 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2086 } 2087 2088 void hci_emit_dedicated_bonding_result(hci_connection_t * connection, uint8_t status){ 2089 log_info("hci_emit_dedicated_bonding_result %u ", status); 2090 uint8_t event[9]; 2091 int pos = 0; 2092 event[pos++] = GAP_DEDICATED_BONDING_COMPLETED; 2093 event[pos++] = sizeof(event) - 2; 2094 event[pos++] = status; 2095 bt_flip_addr( * (bd_addr_t *) &event[pos], connection->address); 2096 pos += 6; 2097 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 2098 hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 2099 } 2100 2101 // query if remote side supports SSP 2102 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 2103 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2104 if (!connection) return 0; 2105 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 2106 } 2107 2108 int hci_ssp_supported_on_both_sides(hci_con_handle_t handle){ 2109 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 2110 } 2111 2112 // GAP API 2113 /** 2114 * @bbrief enable/disable bonding. default is enabled 2115 * @praram enabled 2116 */ 2117 void gap_set_bondable_mode(int enable){ 2118 hci_stack->bondable = enable ? 1 : 0; 2119 } 2120 2121 /** 2122 * @brief map link keys to security levels 2123 */ 2124 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 2125 switch (link_key_type){ 2126 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 2127 return LEVEL_4; 2128 case COMBINATION_KEY: 2129 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 2130 return LEVEL_3; 2131 default: 2132 return LEVEL_2; 2133 } 2134 } 2135 2136 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 2137 if (!connection) return LEVEL_0; 2138 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 2139 return gap_security_level_for_link_key_type(connection->link_key_type); 2140 } 2141 2142 2143 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 2144 printf("gap_mitm_protection_required_for_security_level %u\n", level); 2145 return level > LEVEL_2; 2146 } 2147 2148 /** 2149 * @brief get current security level 2150 */ 2151 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 2152 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2153 if (!connection) return LEVEL_0; 2154 return gap_security_level_for_connection(connection); 2155 } 2156 2157 /** 2158 * @brief request connection to device to 2159 * @result GAP_AUTHENTICATION_RESULT 2160 */ 2161 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 2162 hci_connection_t * connection = hci_connection_for_handle(con_handle); 2163 if (!connection){ 2164 hci_emit_security_level(con_handle, LEVEL_0); 2165 return; 2166 } 2167 gap_security_level_t current_level = gap_security_level(con_handle); 2168 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 2169 if (current_level >= requested_level){ 2170 hci_emit_security_level(con_handle, current_level); 2171 return; 2172 } 2173 2174 connection->requested_security_level = requested_level; 2175 2176 // would enabling ecnryption suffice (>= LEVEL_2)? 2177 if (hci_stack->remote_device_db){ 2178 link_key_type_t link_key_type; 2179 link_key_t link_key; 2180 if (hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 2181 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 2182 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2183 return; 2184 } 2185 } 2186 } 2187 2188 // try to authenticate connection 2189 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2190 hci_run(); 2191 } 2192 2193 /** 2194 * @brief start dedicated bonding with device. disconnect after bonding 2195 * @param device 2196 * @param request MITM protection 2197 * @result GAP_DEDICATED_BONDING_COMPLETE 2198 */ 2199 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 2200 2201 // create connection state machine 2202 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 2203 2204 if (!connection){ 2205 return BTSTACK_MEMORY_ALLOC_FAILED; 2206 } 2207 2208 // delete linkn key 2209 hci_drop_link_key_for_bd_addr( (bd_addr_t *) &device); 2210 2211 // configure LEVEL_2/3, dedicated bonding 2212 connection->state = SEND_CREATE_CONNECTION; 2213 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 2214 printf("gap_dedicated_bonding, mitm %u -> level %u\n", mitm_protection_required, connection->requested_security_level); 2215 connection->bonding_flags = BONDING_DEDICATED; 2216 2217 // wait for GAP Security Result and send GAP Dedicated Bonding complete 2218 2219 // handle: connnection failure (connection complete != ok) 2220 // handle: authentication failure 2221 // handle: disconnect on done 2222 2223 hci_run(); 2224 2225 return 0; 2226 } 2227 2228 void gap_set_local_name(const char * local_name){ 2229 hci_stack->local_name = local_name; 2230 } 2231 2232 le_command_status_t le_central_start_scan(){ 2233 if (hci_stack->le_scanning_state == LE_SCANNING) return BLE_PERIPHERAL_OK; 2234 hci_stack->le_scanning_state = LE_START_SCAN; 2235 hci_run(); 2236 return BLE_PERIPHERAL_OK; 2237 } 2238 2239 le_command_status_t le_central_stop_scan(){ 2240 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return BLE_PERIPHERAL_OK; 2241 hci_stack->le_scanning_state = LE_STOP_SCAN; 2242 hci_run(); 2243 return BLE_PERIPHERAL_OK; 2244 } 2245 2246 void le_central_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 2247 hci_stack->le_scan_type = scan_type; 2248 hci_stack->le_scan_interval = scan_interval; 2249 hci_stack->le_scan_window = scan_window; 2250 hci_run(); 2251 } 2252 2253 le_command_status_t le_central_connect(bd_addr_t * addr, bd_addr_type_t addr_type){ 2254 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2255 if (!conn){ 2256 log_info("le_central_connect: no connection exists yet, creating context"); 2257 conn = create_connection_for_bd_addr_and_type(*addr, addr_type); 2258 if (!conn){ 2259 // notify client that alloc failed 2260 hci_emit_le_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 2261 log_info("le_central_connect: failed to alloc context"); 2262 return BLE_PERIPHERAL_NOT_CONNECTED; // don't sent packet to controller 2263 } 2264 conn->state = SEND_CREATE_CONNECTION; 2265 log_info("le_central_connect: send create connection next"); 2266 hci_run(); 2267 return BLE_PERIPHERAL_OK; 2268 } 2269 2270 if (!hci_is_le_connection(conn) || 2271 conn->state == SEND_CREATE_CONNECTION || 2272 conn->state == SENT_CREATE_CONNECTION) { 2273 hci_emit_le_connection_complete(conn, ERROR_CODE_COMMAND_DISALLOWED); 2274 log_error("le_central_connect: classic connection or connect is already being created"); 2275 return BLE_PERIPHERAL_IN_WRONG_STATE; 2276 } 2277 2278 log_info("le_central_connect: context exists with state %u", conn->state); 2279 hci_emit_le_connection_complete(conn, 0); 2280 hci_run(); 2281 return BLE_PERIPHERAL_OK; 2282 } 2283 2284 // @assumption: only a single outgoing LE Connection exists 2285 static hci_connection_t * le_central_get_outgoing_connection(){ 2286 linked_item_t *it; 2287 for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){ 2288 hci_connection_t * conn = (hci_connection_t *) it; 2289 if (!hci_is_le_connection(conn)) continue; 2290 switch (conn->state){ 2291 case SEND_CREATE_CONNECTION: 2292 case SENT_CREATE_CONNECTION: 2293 return conn; 2294 default: 2295 break; 2296 }; 2297 } 2298 return NULL; 2299 } 2300 2301 le_command_status_t le_central_connect_cancel(){ 2302 hci_connection_t * conn = le_central_get_outgoing_connection(); 2303 switch (conn->state){ 2304 case SEND_CREATE_CONNECTION: 2305 // skip sending create connection and emit event instead 2306 hci_emit_le_connection_complete(conn, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 2307 linked_list_remove(&hci_stack->connections, (linked_item_t *) conn); 2308 btstack_memory_hci_connection_free( conn ); 2309 break; 2310 case SENT_CREATE_CONNECTION: 2311 // request to send cancel connection 2312 conn->state = SEND_CANCEL_CONNECTION; 2313 hci_run(); 2314 break; 2315 default: 2316 break; 2317 } 2318 return BLE_PERIPHERAL_OK; 2319 } 2320 2321 le_command_status_t gap_disconnect(hci_con_handle_t handle){ 2322 hci_connection_t * conn = hci_connection_for_handle(handle); 2323 if (!conn){ 2324 hci_emit_disconnection_complete(handle, 0); 2325 return BLE_PERIPHERAL_OK; 2326 } 2327 conn->state = SEND_DISCONNECT; 2328 hci_run(); 2329 return BLE_PERIPHERAL_OK; 2330 } 2331 2332 void hci_disconnect_all(){ 2333 linked_list_iterator_t it; 2334 linked_list_iterator_init(&it, &hci_stack->connections); 2335 while (linked_list_iterator_has_next(&it)){ 2336 hci_connection_t * con = (hci_connection_t*) linked_list_iterator_next(&it); 2337 if (con->state == SENT_DISCONNECT) continue; 2338 con->state = SEND_DISCONNECT; 2339 } 2340 hci_run(); 2341 } 2342