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