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 "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 74 // the STACK is here 75 static hci_stack_t hci_stack; 76 77 /** 78 * get connection for a given handle 79 * 80 * @return connection OR NULL, if not found 81 */ 82 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 83 linked_item_t *it; 84 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 85 if ( ((hci_connection_t *) it)->con_handle == con_handle){ 86 return (hci_connection_t *) it; 87 } 88 } 89 return NULL; 90 } 91 92 static void hci_connection_timeout_handler(timer_source_t *timer){ 93 hci_connection_t * connection = (hci_connection_t *) linked_item_get_user(&timer->item); 94 #ifdef HAVE_TIME 95 struct timeval tv; 96 gettimeofday(&tv, NULL); 97 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 98 // connections might be timed out 99 hci_emit_l2cap_check_timeout(connection); 100 } 101 #endif 102 #ifdef HAVE_TICK 103 if (embedded_get_ticks() > connection->timestamp + embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 104 // connections might be timed out 105 hci_emit_l2cap_check_timeout(connection); 106 } 107 #endif 108 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 109 run_loop_add_timer(timer); 110 } 111 112 static void hci_connection_timestamp(hci_connection_t *connection){ 113 #ifdef HAVE_TIME 114 gettimeofday(&connection->timestamp, NULL); 115 #endif 116 #ifdef HAVE_TICK 117 connection->timestamp = embedded_get_ticks(); 118 #endif 119 } 120 121 /** 122 * create connection for given address 123 * 124 * @return connection OR NULL, if no memory left 125 */ 126 static hci_connection_t * create_connection_for_addr(bd_addr_t addr){ 127 hci_connection_t * conn = (hci_connection_t *) btstack_memory_hci_connection_get(); 128 if (!conn) return NULL; 129 BD_ADDR_COPY(conn->address, addr); 130 conn->con_handle = 0xffff; 131 conn->authentication_flags = AUTH_FLAGS_NONE; 132 conn->bonding_flags = 0; 133 linked_item_set_user(&conn->timeout.item, conn); 134 conn->timeout.process = hci_connection_timeout_handler; 135 hci_connection_timestamp(conn); 136 conn->acl_recombination_length = 0; 137 conn->acl_recombination_pos = 0; 138 conn->num_acl_packets_sent = 0; 139 linked_list_add(&hci_stack.connections, (linked_item_t *) conn); 140 return conn; 141 } 142 143 /** 144 * get connection for given address 145 * 146 * @return connection OR NULL, if not found 147 */ 148 static hci_connection_t * connection_for_address(bd_addr_t address){ 149 linked_item_t *it; 150 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 151 if ( ! BD_ADDR_CMP( ((hci_connection_t *) it)->address, address) ){ 152 return (hci_connection_t *) it; 153 } 154 } 155 return NULL; 156 } 157 158 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 159 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 160 } 161 162 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 163 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 164 } 165 166 167 /** 168 * add authentication flags and reset timer 169 */ 170 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 171 bd_addr_t addr; 172 bt_flip_addr(addr, *(bd_addr_t *) bd_addr); 173 hci_connection_t * conn = connection_for_address(addr); 174 if (conn) { 175 connectionSetAuthenticationFlags(conn, flags); 176 hci_connection_timestamp(conn); 177 } 178 } 179 180 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 181 hci_connection_t * conn = hci_connection_for_handle(handle); 182 if (!conn) return 0; 183 if (!conn->authentication_flags) return 0; 184 if (conn->authentication_flags & SENT_LINK_KEY_REPLY) return 0; 185 if (conn->authentication_flags & RECV_LINK_KEY_NOTIFICATION) return 0; 186 return 1; 187 } 188 189 void hci_drop_link_key_for_bd_addr(bd_addr_t *addr){ 190 if (hci_stack.remote_device_db) { 191 hci_stack.remote_device_db->delete_link_key(addr); 192 } 193 } 194 195 196 /** 197 * count connections 198 */ 199 static int nr_hci_connections(void){ 200 int count = 0; 201 linked_item_t *it; 202 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next, count++); 203 return count; 204 } 205 206 /** 207 * Dummy handler called by HCI 208 */ 209 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 210 } 211 212 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 213 hci_connection_t * connection = hci_connection_for_handle(handle); 214 if (!connection) { 215 log_error("hci_number_outgoing_packets connectino for handle %u does not exist!\n", handle); 216 return 0; 217 } 218 return connection->num_acl_packets_sent; 219 } 220 221 uint8_t hci_number_free_acl_slots(){ 222 uint8_t free_slots = hci_stack.total_num_acl_packets; 223 linked_item_t *it; 224 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 225 hci_connection_t * connection = (hci_connection_t *) it; 226 if (free_slots < connection->num_acl_packets_sent) { 227 log_error("hci_number_free_acl_slots: sum of outgoing packets > total acl packets!\n"); 228 return 0; 229 } 230 free_slots -= connection->num_acl_packets_sent; 231 } 232 return free_slots; 233 } 234 235 int hci_can_send_packet_now(uint8_t packet_type){ 236 237 // check for async hci transport implementations 238 if (hci_stack.hci_transport->can_send_packet_now){ 239 if (!hci_stack.hci_transport->can_send_packet_now(packet_type)){ 240 return 0; 241 } 242 } 243 244 // check regular Bluetooth flow control 245 switch (packet_type) { 246 case HCI_ACL_DATA_PACKET: 247 return hci_number_free_acl_slots(); 248 case HCI_COMMAND_DATA_PACKET: 249 return hci_stack.num_cmd_packets; 250 default: 251 return 0; 252 } 253 } 254 255 int hci_send_acl_packet(uint8_t *packet, int size){ 256 257 // check for free places on BT module 258 if (!hci_number_free_acl_slots()) return BTSTACK_ACL_BUFFERS_FULL; 259 260 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 261 hci_connection_t *connection = hci_connection_for_handle( con_handle); 262 if (!connection) return 0; 263 hci_connection_timestamp(connection); 264 265 // count packet 266 connection->num_acl_packets_sent++; 267 // log_info("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 268 269 // send packet 270 int err = hci_stack.hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 271 272 return err; 273 } 274 275 static void acl_handler(uint8_t *packet, int size){ 276 277 // log_info("acl_handler: size %u", size); 278 279 // get info 280 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 281 hci_connection_t *conn = hci_connection_for_handle(con_handle); 282 uint8_t acl_flags = READ_ACL_FLAGS(packet); 283 uint16_t acl_length = READ_ACL_LENGTH(packet); 284 285 // ignore non-registered handle 286 if (!conn){ 287 log_error( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 288 return; 289 } 290 291 // assert packet is complete 292 if (acl_length + 4 != size){ 293 log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4); 294 return; 295 } 296 297 // update idle timestamp 298 hci_connection_timestamp(conn); 299 300 // handle different packet types 301 switch (acl_flags & 0x03) { 302 303 case 0x01: // continuation fragment 304 305 // sanity check 306 if (conn->acl_recombination_pos == 0) { 307 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 308 return; 309 } 310 311 // append fragment payload (header already stored) 312 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 313 conn->acl_recombination_pos += acl_length; 314 315 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", acl_length, 316 // conn->acl_recombination_pos, conn->acl_recombination_length); 317 318 // forward complete L2CAP packet if complete. 319 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 320 321 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 322 // reset recombination buffer 323 conn->acl_recombination_length = 0; 324 conn->acl_recombination_pos = 0; 325 } 326 break; 327 328 case 0x02: { // first fragment 329 330 // sanity check 331 if (conn->acl_recombination_pos) { 332 log_error( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 333 return; 334 } 335 336 // peek into L2CAP packet! 337 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 338 339 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 340 341 // compare fragment size to L2CAP packet size 342 if (acl_length >= l2cap_length + 4){ 343 344 // forward fragment as L2CAP packet 345 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 346 347 } else { 348 // store first fragment and tweak acl length for complete package 349 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 350 conn->acl_recombination_pos = acl_length + 4; 351 conn->acl_recombination_length = l2cap_length; 352 bt_store_16(conn->acl_recombination_buffer, 2, l2cap_length +4); 353 } 354 break; 355 356 } 357 default: 358 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 359 return; 360 } 361 362 // execute main loop 363 hci_run(); 364 } 365 366 static void hci_shutdown_connection(hci_connection_t *conn){ 367 log_info("Connection closed: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 368 369 // cancel all l2cap connections 370 hci_emit_disconnection_complete(conn->con_handle, 0x16); // terminated by local host 371 372 run_loop_remove_timer(&conn->timeout); 373 374 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 375 btstack_memory_hci_connection_free( conn ); 376 377 // now it's gone 378 hci_emit_nr_connections_changed(); 379 } 380 381 static const uint16_t packet_type_sizes[] = { 382 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 383 HCI_ACL_DH1_SIZE, 0, 0, 0, 384 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 385 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 386 }; 387 static const uint8_t packet_type_feature_requirement_bit[] = { 388 0, // 3 slot packets 389 1, // 5 slot packets 390 25, // EDR 2 mpbs 391 26, // EDR 3 mbps 392 39, // 3 slot EDR packts 393 40, // 5 slot EDR packet 394 }; 395 static const uint16_t packet_type_feature_packet_mask[] = { 396 0x0f00, // 3 slot packets 397 0xf000, // 5 slot packets 398 0x1102, // EDR 2 mpbs 399 0x2204, // EDR 3 mbps 400 0x0300, // 3 slot EDR packts 401 0x3000, // 5 slot EDR packet 402 }; 403 404 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 405 // enable packet types based on size 406 uint16_t packet_types = 0; 407 int i; 408 for (i=0;i<16;i++){ 409 if (packet_type_sizes[i] == 0) continue; 410 if (packet_type_sizes[i] <= buffer_size){ 411 packet_types |= 1 << i; 412 } 413 } 414 // disable packet types due to missing local supported features 415 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 416 int bit_idx = packet_type_feature_requirement_bit[i]; 417 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 418 if (feature_set) continue; 419 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 420 packet_types &= ~packet_type_feature_packet_mask[i]; 421 } 422 // flip bits for "may not be used" 423 packet_types ^= 0x3306; 424 return packet_types; 425 } 426 427 uint16_t hci_usable_acl_packet_types(void){ 428 return hci_stack.packet_types; 429 } 430 431 uint8_t* hci_get_outgoing_acl_packet_buffer(void){ 432 // hci packet buffer is >= acl data packet length 433 return hci_stack.hci_packet_buffer; 434 } 435 436 uint16_t hci_max_acl_data_packet_length(void){ 437 return hci_stack.acl_data_packet_length; 438 } 439 440 int hci_ssp_supported(void){ 441 // No 51, byte 6, bit 3 442 return (hci_stack.local_supported_features[6] & (1 << 3)) != 0; 443 } 444 445 int hci_classic_supported(void){ 446 // No 37, byte 4, bit 5, = No BR/EDR Support 447 return (hci_stack.local_supported_features[4] & (1 << 5)) == 0; 448 } 449 450 int hci_le_supported(void){ 451 // No 37, byte 4, bit 6 = LE Supported (Controller) 452 #ifdef HAVE_BLE 453 return (hci_stack.local_supported_features[4] & (1 << 6)) != 0; 454 #else 455 return 0; 456 #endif 457 } 458 459 // get addr type and address used in advertisement packets 460 void hci_le_advertisement_address(uint8_t * addr_type, bd_addr_t * addr){ 461 *addr_type = hci_stack.adv_addr_type; 462 if (hci_stack.adv_addr_type){ 463 memcpy(addr, hci_stack.adv_address, 6); 464 } else { 465 memcpy(addr, hci_stack.local_bd_addr, 6); 466 } 467 } 468 469 // avoid huge local variables 470 #ifndef EMBEDDED 471 static device_name_t device_name; 472 #endif 473 static void event_handler(uint8_t *packet, int size){ 474 475 uint16_t event_length = packet[1]; 476 477 // assert packet is complete 478 if (size != event_length + 2){ 479 log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2); 480 return; 481 } 482 483 bd_addr_t addr; 484 uint8_t link_type; 485 hci_con_handle_t handle; 486 hci_connection_t * conn; 487 int i; 488 489 // printf("HCI:EVENT:%02x\n", packet[0]); 490 491 switch (packet[0]) { 492 493 case HCI_EVENT_COMMAND_COMPLETE: 494 // get num cmd packets 495 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack.num_cmd_packets, packet[2]); 496 hci_stack.num_cmd_packets = packet[2]; 497 498 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 499 // from offset 5 500 // status 501 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 502 hci_stack.acl_data_packet_length = READ_BT_16(packet, 6); 503 // ignore: SCO data packet len (8) 504 hci_stack.total_num_acl_packets = packet[9]; 505 // ignore: total num SCO packets 506 if (hci_stack.state == HCI_STATE_INITIALIZING){ 507 // determine usable ACL payload size 508 if (HCI_ACL_PAYLOAD_SIZE < hci_stack.acl_data_packet_length){ 509 hci_stack.acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 510 } 511 log_info("hci_read_buffer_size: used size %u, count %u\n", 512 hci_stack.acl_data_packet_length, hci_stack.total_num_acl_packets); 513 } 514 } 515 #ifdef HAVE_BLE 516 if (COMMAND_COMPLETE_EVENT(packet, hci_le_read_buffer_size)){ 517 hci_stack.le_data_packet_length = READ_BT_16(packet, 6); 518 hci_stack.total_num_le_packets = packet[8]; 519 log_info("hci_le_read_buffer_size: size %u, count %u\n", hci_stack.le_data_packet_length, hci_stack.total_num_le_packets); 520 } 521 #endif 522 // Dump local address 523 if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)) { 524 bt_flip_addr(hci_stack.local_bd_addr, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1]); 525 log_info("Local Address, Status: 0x%02x: Addr: %s\n", 526 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack.local_bd_addr)); 527 } 528 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 529 hci_emit_discoverable_enabled(hci_stack.discoverable); 530 } 531 // Note: HCI init checks 532 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_features)){ 533 memcpy(hci_stack.local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 534 log_info("Local Supported Features: 0x%02x%02x%02x%02x%02x%02x%02x%02x", 535 hci_stack.local_supported_features[0], hci_stack.local_supported_features[1], 536 hci_stack.local_supported_features[2], hci_stack.local_supported_features[3], 537 hci_stack.local_supported_features[4], hci_stack.local_supported_features[5], 538 hci_stack.local_supported_features[6], hci_stack.local_supported_features[7]); 539 540 // determine usable ACL packet types based buffer size and supported features 541 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]); 542 log_info("packet types %04x", hci_stack.packet_types); 543 544 // Classic/LE 545 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 546 } 547 break; 548 549 case HCI_EVENT_COMMAND_STATUS: 550 // get num cmd packets 551 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack.num_cmd_packets, packet[3]); 552 hci_stack.num_cmd_packets = packet[3]; 553 break; 554 555 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 556 for (i=0; i<packet[2];i++){ 557 handle = READ_BT_16(packet, 3 + 2*i); 558 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 559 conn = hci_connection_for_handle(handle); 560 if (!conn){ 561 log_error("hci_number_completed_packet lists unused con handle %u\n", handle); 562 continue; 563 } 564 conn->num_acl_packets_sent -= num_packets; 565 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 566 } 567 break; 568 569 case HCI_EVENT_CONNECTION_REQUEST: 570 bt_flip_addr(addr, &packet[2]); 571 // TODO: eval COD 8-10 572 link_type = packet[11]; 573 log_info("Connection_incoming: %s, type %u\n", bd_addr_to_str(addr), link_type); 574 if (link_type == 1) { // ACL 575 conn = connection_for_address(addr); 576 if (!conn) { 577 conn = create_connection_for_addr(addr); 578 } 579 if (!conn) { 580 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 581 hci_stack.decline_reason = 0x0d; 582 BD_ADDR_COPY(hci_stack.decline_addr, addr); 583 break; 584 } 585 conn->state = RECEIVED_CONNECTION_REQUEST; 586 hci_run(); 587 } else { 588 // SYNCHRONOUS CONNECTION LIMIT TO A DEVICE EXCEEDED (0X0A) 589 hci_stack.decline_reason = 0x0a; 590 BD_ADDR_COPY(hci_stack.decline_addr, addr); 591 } 592 break; 593 594 case HCI_EVENT_CONNECTION_COMPLETE: 595 // Connection management 596 bt_flip_addr(addr, &packet[5]); 597 log_info("Connection_complete (status=%u) %s\n", packet[2], bd_addr_to_str(addr)); 598 conn = connection_for_address(addr); 599 if (conn) { 600 if (!packet[2]){ 601 conn->state = OPEN; 602 conn->con_handle = READ_BT_16(packet, 3); 603 conn->bonding_flags = BONDING_REQUEST_REMOTE_FEATURES; 604 605 // restart timer 606 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 607 run_loop_add_timer(&conn->timeout); 608 609 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 610 611 hci_emit_nr_connections_changed(); 612 } else { 613 // connection failed, remove entry 614 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 615 btstack_memory_hci_connection_free( conn ); 616 617 // if authentication error, also delete link key 618 if (packet[2] == 0x05) { 619 hci_drop_link_key_for_bd_addr(&addr); 620 } 621 } 622 } 623 break; 624 625 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 626 handle = READ_BT_16(packet, 3); 627 conn = hci_connection_for_handle(handle); 628 if (!conn) break; 629 if (!packet[2]){ 630 uint8_t * features = &packet[5]; 631 if (features[6] & (1 << 3)){ 632 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 633 } 634 } 635 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 636 break; 637 638 case HCI_EVENT_LINK_KEY_REQUEST: 639 log_info("HCI_EVENT_LINK_KEY_REQUEST\n"); 640 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 641 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 642 if (hci_stack.bondable && !hci_stack.remote_device_db) break; 643 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 644 hci_run(); 645 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 646 return; 647 648 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 649 bt_flip_addr(addr, &packet[2]); 650 conn = connection_for_address(addr); 651 if (!conn) break; 652 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 653 link_key_type_t link_key_type = packet[24]; 654 // Change Connection Encryption keeps link key type 655 if (link_key_type != CHANGED_COMBINATION_KEY){ 656 conn->link_key_type = link_key_type; 657 } 658 if (!hci_stack.remote_device_db) break; 659 hci_stack.remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8], conn->link_key_type); 660 // still forward event to allow dismiss of pairing dialog 661 break; 662 } 663 664 case HCI_EVENT_PIN_CODE_REQUEST: 665 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_PIN_CODE_REQUEST); 666 // non-bondable mode: pin code negative reply will be sent 667 if (!hci_stack.bondable){ 668 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_PIN_CODE_REQUEST); 669 hci_run(); 670 return; 671 } 672 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 673 if (!hci_stack.remote_device_db) break; 674 bt_flip_addr(addr, &packet[2]); 675 hci_stack.remote_device_db->delete_link_key(&addr); 676 break; 677 678 case HCI_EVENT_IO_CAPABILITY_REQUEST: 679 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 680 if (!hci_stack.bondable || hci_stack.ssp_io_capability == SSP_IO_CAPABILITY_UNKNOWN) break; 681 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 682 break; 683 684 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 685 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_USER_CONFIRM_REQUEST); 686 if (!hci_stack.ssp_auto_accept) break; 687 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 688 break; 689 690 case HCI_EVENT_USER_PASSKEY_REQUEST: 691 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_USER_PASSKEY_REQUEST); 692 if (!hci_stack.ssp_auto_accept) break; 693 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 694 break; 695 696 case HCI_EVENT_ENCRYPTION_CHANGE: 697 if (packet[2]) break; // error status 698 handle = READ_BT_16(packet, 3); 699 conn = hci_connection_for_handle(handle); 700 if (!conn) break; 701 if (packet[5]){ 702 conn->authentication_flags |= CONNECTION_ENCRYPTED; 703 } else { 704 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 705 } 706 break; 707 708 #ifndef EMBEDDED 709 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 710 if (!hci_stack.remote_device_db) break; 711 if (packet[2]) break; // status not ok 712 bt_flip_addr(addr, &packet[3]); 713 // fix for invalid remote names - terminate on 0xff 714 for (i=0; i<248;i++){ 715 if (packet[9+i] == 0xff){ 716 packet[9+i] = 0; 717 break; 718 } 719 } 720 memset(&device_name, 0, sizeof(device_name_t)); 721 strncpy((char*) device_name, (char*) &packet[9], 248); 722 hci_stack.remote_device_db->put_name(&addr, &device_name); 723 break; 724 725 case HCI_EVENT_INQUIRY_RESULT: 726 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 727 if (!hci_stack.remote_device_db) break; 728 // first send inq result packet 729 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 730 // then send cached remote names 731 for (i=0; i<packet[2];i++){ 732 bt_flip_addr(addr, &packet[3+i*6]); 733 if (hci_stack.remote_device_db->get_name(&addr, &device_name)){ 734 hci_emit_remote_name_cached(&addr, &device_name); 735 } 736 } 737 return; 738 #endif 739 740 case HCI_EVENT_DISCONNECTION_COMPLETE: 741 if (!packet[2]){ 742 handle = READ_BT_16(packet, 3); 743 hci_connection_t * conn = hci_connection_for_handle(handle); 744 if (conn) { 745 hci_shutdown_connection(conn); 746 } 747 } 748 break; 749 750 case HCI_EVENT_HARDWARE_ERROR: 751 if(hci_stack.control && hci_stack.control->hw_error){ 752 (*hci_stack.control->hw_error)(); 753 } 754 break; 755 756 #ifdef HAVE_BLE 757 case HCI_EVENT_LE_META: 758 switch (packet[2]) { 759 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 760 // Connection management 761 bt_flip_addr(addr, &packet[8]); 762 log_info("LE Connection_complete (status=%u) %s\n", packet[3], bd_addr_to_str(addr)); 763 // LE connections are auto-accepted, so just create a connection if there isn't one already 764 conn = connection_for_address(addr); 765 if (packet[3]){ 766 if (conn){ 767 // outgoing connection failed, remove entry 768 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 769 btstack_memory_hci_connection_free( conn ); 770 771 } 772 // if authentication error, also delete link key 773 if (packet[3] == 0x05) { 774 hci_drop_link_key_for_bd_addr(&addr); 775 } 776 break; 777 } 778 if (!conn){ 779 conn = create_connection_for_addr(addr); 780 } 781 if (!conn){ 782 // no memory 783 break; 784 } 785 786 conn->state = OPEN; 787 conn->con_handle = READ_BT_16(packet, 4); 788 789 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 790 791 // restart timer 792 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 793 // run_loop_add_timer(&conn->timeout); 794 795 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 796 797 hci_emit_nr_connections_changed(); 798 break; 799 800 // printf("LE buffer size: %u, count %u\n", READ_BT_16(packet,6), packet[8]); 801 802 default: 803 break; 804 } 805 break; 806 #endif 807 808 default: 809 break; 810 } 811 812 // handle BT initialization 813 if (hci_stack.state == HCI_STATE_INITIALIZING){ 814 if (hci_stack.substate % 2){ 815 // odd: waiting for event 816 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE || packet[0] == HCI_EVENT_COMMAND_STATUS){ 817 // wait for explicit COMMAND COMPLETE on RESET 818 if (hci_stack.substate > 1 || COMMAND_COMPLETE_EVENT(packet, hci_reset)) { 819 hci_stack.substate++; 820 } 821 } 822 } 823 } 824 825 // help with BT sleep 826 if (hci_stack.state == HCI_STATE_FALLING_ASLEEP 827 && hci_stack.substate == 1 828 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 829 hci_stack.substate++; 830 } 831 832 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 833 834 // execute main loop 835 hci_run(); 836 } 837 838 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 839 switch (packet_type) { 840 case HCI_EVENT_PACKET: 841 event_handler(packet, size); 842 break; 843 case HCI_ACL_DATA_PACKET: 844 acl_handler(packet, size); 845 break; 846 default: 847 break; 848 } 849 } 850 851 /** Register HCI packet handlers */ 852 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 853 hci_stack.packet_handler = handler; 854 } 855 856 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 857 858 // reference to use transport layer implementation 859 hci_stack.hci_transport = transport; 860 861 // references to used control implementation 862 hci_stack.control = control; 863 864 // reference to used config 865 hci_stack.config = config; 866 867 // no connections yet 868 hci_stack.connections = NULL; 869 hci_stack.discoverable = 0; 870 hci_stack.connectable = 0; 871 hci_stack.bondable = 1; 872 873 // no pending cmds 874 hci_stack.decline_reason = 0; 875 hci_stack.new_scan_enable_value = 0xff; 876 877 // higher level handler 878 hci_stack.packet_handler = dummy_handler; 879 880 // store and open remote device db 881 hci_stack.remote_device_db = remote_device_db; 882 if (hci_stack.remote_device_db) { 883 hci_stack.remote_device_db->open(); 884 } 885 886 // max acl payload size defined in config.h 887 hci_stack.acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 888 889 // register packet handlers with transport 890 transport->register_packet_handler(&packet_handler); 891 892 hci_stack.state = HCI_STATE_OFF; 893 894 // class of device 895 hci_stack.class_of_device = 0x007a020c; // Smartphone 896 897 // Secure Simple Pairing default: enable, no I/O capabilities, auto accept 898 hci_stack.ssp_enable = 1; 899 hci_stack.ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 900 hci_stack.ssp_authentication_requirement = 0; 901 hci_stack.ssp_auto_accept = 1; 902 903 // LE 904 hci_stack.adv_addr_type = 0; 905 memset(hci_stack.adv_address, 0, 6); 906 } 907 908 void hci_close(){ 909 // close remote device db 910 if (hci_stack.remote_device_db) { 911 hci_stack.remote_device_db->close(); 912 } 913 while (hci_stack.connections) { 914 hci_shutdown_connection((hci_connection_t *) hci_stack.connections); 915 } 916 hci_power_control(HCI_POWER_OFF); 917 } 918 919 // State-Module-Driver overview 920 // state module low-level 921 // HCI_STATE_OFF off close 922 // HCI_STATE_INITIALIZING, on open 923 // HCI_STATE_WORKING, on open 924 // HCI_STATE_HALTING, on open 925 // HCI_STATE_SLEEPING, off/sleep close 926 // HCI_STATE_FALLING_ASLEEP on open 927 928 static int hci_power_control_on(void){ 929 930 // power on 931 int err = 0; 932 if (hci_stack.control && hci_stack.control->on){ 933 err = (*hci_stack.control->on)(hci_stack.config); 934 } 935 if (err){ 936 log_error( "POWER_ON failed\n"); 937 hci_emit_hci_open_failed(); 938 return err; 939 } 940 941 // open low-level device 942 err = hci_stack.hci_transport->open(hci_stack.config); 943 if (err){ 944 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 945 if (hci_stack.control && hci_stack.control->off){ 946 (*hci_stack.control->off)(hci_stack.config); 947 } 948 hci_emit_hci_open_failed(); 949 return err; 950 } 951 return 0; 952 } 953 954 static void hci_power_control_off(void){ 955 956 log_info("hci_power_control_off\n"); 957 958 // close low-level device 959 hci_stack.hci_transport->close(hci_stack.config); 960 961 log_info("hci_power_control_off - hci_transport closed\n"); 962 963 // power off 964 if (hci_stack.control && hci_stack.control->off){ 965 (*hci_stack.control->off)(hci_stack.config); 966 } 967 968 log_info("hci_power_control_off - control closed\n"); 969 970 hci_stack.state = HCI_STATE_OFF; 971 } 972 973 static void hci_power_control_sleep(void){ 974 975 log_info("hci_power_control_sleep\n"); 976 977 #if 0 978 // don't close serial port during sleep 979 980 // close low-level device 981 hci_stack.hci_transport->close(hci_stack.config); 982 #endif 983 984 // sleep mode 985 if (hci_stack.control && hci_stack.control->sleep){ 986 (*hci_stack.control->sleep)(hci_stack.config); 987 } 988 989 hci_stack.state = HCI_STATE_SLEEPING; 990 } 991 992 static int hci_power_control_wake(void){ 993 994 log_info("hci_power_control_wake\n"); 995 996 // wake on 997 if (hci_stack.control && hci_stack.control->wake){ 998 (*hci_stack.control->wake)(hci_stack.config); 999 } 1000 1001 #if 0 1002 // open low-level device 1003 int err = hci_stack.hci_transport->open(hci_stack.config); 1004 if (err){ 1005 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 1006 if (hci_stack.control && hci_stack.control->off){ 1007 (*hci_stack.control->off)(hci_stack.config); 1008 } 1009 hci_emit_hci_open_failed(); 1010 return err; 1011 } 1012 #endif 1013 1014 return 0; 1015 } 1016 1017 1018 int hci_power_control(HCI_POWER_MODE power_mode){ 1019 1020 log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack.state); 1021 1022 int err = 0; 1023 switch (hci_stack.state){ 1024 1025 case HCI_STATE_OFF: 1026 switch (power_mode){ 1027 case HCI_POWER_ON: 1028 err = hci_power_control_on(); 1029 if (err) return err; 1030 // set up state machine 1031 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 1032 hci_stack.state = HCI_STATE_INITIALIZING; 1033 hci_stack.substate = 0; 1034 break; 1035 case HCI_POWER_OFF: 1036 // do nothing 1037 break; 1038 case HCI_POWER_SLEEP: 1039 // do nothing (with SLEEP == OFF) 1040 break; 1041 } 1042 break; 1043 1044 case HCI_STATE_INITIALIZING: 1045 switch (power_mode){ 1046 case HCI_POWER_ON: 1047 // do nothing 1048 break; 1049 case HCI_POWER_OFF: 1050 // no connections yet, just turn it off 1051 hci_power_control_off(); 1052 break; 1053 case HCI_POWER_SLEEP: 1054 // no connections yet, just turn it off 1055 hci_power_control_sleep(); 1056 break; 1057 } 1058 break; 1059 1060 case HCI_STATE_WORKING: 1061 switch (power_mode){ 1062 case HCI_POWER_ON: 1063 // do nothing 1064 break; 1065 case HCI_POWER_OFF: 1066 // see hci_run 1067 hci_stack.state = HCI_STATE_HALTING; 1068 break; 1069 case HCI_POWER_SLEEP: 1070 // see hci_run 1071 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 1072 hci_stack.substate = 0; 1073 break; 1074 } 1075 break; 1076 1077 case HCI_STATE_HALTING: 1078 switch (power_mode){ 1079 case HCI_POWER_ON: 1080 // set up state machine 1081 hci_stack.state = HCI_STATE_INITIALIZING; 1082 hci_stack.substate = 0; 1083 break; 1084 case HCI_POWER_OFF: 1085 // do nothing 1086 break; 1087 case HCI_POWER_SLEEP: 1088 // see hci_run 1089 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 1090 hci_stack.substate = 0; 1091 break; 1092 } 1093 break; 1094 1095 case HCI_STATE_FALLING_ASLEEP: 1096 switch (power_mode){ 1097 case HCI_POWER_ON: 1098 1099 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1100 // nothing to do, if H4 supports power management 1101 if (bt_control_iphone_power_management_enabled()){ 1102 hci_stack.state = HCI_STATE_INITIALIZING; 1103 hci_stack.substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1104 break; 1105 } 1106 #endif 1107 // set up state machine 1108 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 1109 hci_stack.state = HCI_STATE_INITIALIZING; 1110 hci_stack.substate = 0; 1111 break; 1112 case HCI_POWER_OFF: 1113 // see hci_run 1114 hci_stack.state = HCI_STATE_HALTING; 1115 break; 1116 case HCI_POWER_SLEEP: 1117 // do nothing 1118 break; 1119 } 1120 break; 1121 1122 case HCI_STATE_SLEEPING: 1123 switch (power_mode){ 1124 case HCI_POWER_ON: 1125 1126 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1127 // nothing to do, if H4 supports power management 1128 if (bt_control_iphone_power_management_enabled()){ 1129 hci_stack.state = HCI_STATE_INITIALIZING; 1130 hci_stack.substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1131 hci_update_scan_enable(); 1132 break; 1133 } 1134 #endif 1135 err = hci_power_control_wake(); 1136 if (err) return err; 1137 // set up state machine 1138 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 1139 hci_stack.state = HCI_STATE_INITIALIZING; 1140 hci_stack.substate = 0; 1141 break; 1142 case HCI_POWER_OFF: 1143 hci_stack.state = HCI_STATE_HALTING; 1144 break; 1145 case HCI_POWER_SLEEP: 1146 // do nothing 1147 break; 1148 } 1149 break; 1150 } 1151 1152 // create internal event 1153 hci_emit_state(); 1154 1155 // trigger next/first action 1156 hci_run(); 1157 1158 return 0; 1159 } 1160 1161 static void hci_update_scan_enable(void){ 1162 // 2 = page scan, 1 = inq scan 1163 hci_stack.new_scan_enable_value = hci_stack.connectable << 1 | hci_stack.discoverable; 1164 hci_run(); 1165 } 1166 1167 void hci_discoverable_control(uint8_t enable){ 1168 if (enable) enable = 1; // normalize argument 1169 1170 if (hci_stack.discoverable == enable){ 1171 hci_emit_discoverable_enabled(hci_stack.discoverable); 1172 return; 1173 } 1174 1175 hci_stack.discoverable = enable; 1176 hci_update_scan_enable(); 1177 } 1178 1179 void hci_connectable_control(uint8_t enable){ 1180 if (enable) enable = 1; // normalize argument 1181 1182 // don't emit event 1183 if (hci_stack.connectable == enable) return; 1184 1185 hci_stack.connectable = enable; 1186 hci_update_scan_enable(); 1187 } 1188 1189 bd_addr_t * hci_local_bd_addr(void){ 1190 return &hci_stack.local_bd_addr; 1191 } 1192 1193 void hci_run(){ 1194 1195 hci_connection_t * connection; 1196 linked_item_t * it; 1197 1198 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1199 1200 // global/non-connection oriented commands 1201 1202 // decline incoming connections 1203 if (hci_stack.decline_reason){ 1204 uint8_t reason = hci_stack.decline_reason; 1205 hci_stack.decline_reason = 0; 1206 hci_send_cmd(&hci_reject_connection_request, hci_stack.decline_addr, reason); 1207 return; 1208 } 1209 1210 // send scan enable 1211 if (hci_stack.state == HCI_STATE_WORKING && hci_stack.new_scan_enable_value != 0xff && hci_classic_supported()){ 1212 hci_send_cmd(&hci_write_scan_enable, hci_stack.new_scan_enable_value); 1213 hci_stack.new_scan_enable_value = 0xff; 1214 return; 1215 } 1216 1217 // send pending HCI commands 1218 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 1219 1220 connection = (hci_connection_t *) it; 1221 1222 if (connection->state == RECEIVED_CONNECTION_REQUEST){ 1223 log_info("sending hci_accept_connection_request\n"); 1224 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 1225 connection->state = ACCEPTED_CONNECTION_REQUEST; 1226 return; 1227 } 1228 1229 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 1230 link_key_t link_key; 1231 link_key_type_t link_key_type; 1232 log_info("responding to link key request\n"); 1233 if ( hci_stack.bondable && hci_stack.remote_device_db && hci_stack.remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 1234 connection->link_key_type = link_key_type; 1235 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 1236 } else { 1237 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 1238 } 1239 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 1240 return; 1241 } 1242 1243 if (connection->authentication_flags & HANDLE_PIN_CODE_REQUEST){ 1244 log_info("denying to pin request\n"); 1245 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 1246 connectionClearAuthenticationFlags(connection, HANDLE_PIN_CODE_REQUEST); 1247 return; 1248 } 1249 1250 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 1251 if (hci_stack.bondable){ 1252 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack.ssp_io_capability, NULL, hci_stack.ssp_authentication_requirement); 1253 } else { 1254 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 1255 } 1256 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 1257 return; 1258 } 1259 1260 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 1261 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 1262 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 1263 return; 1264 } 1265 1266 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 1267 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 1268 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 1269 return; 1270 } 1271 1272 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 1273 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 1274 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 1275 } 1276 } 1277 1278 switch (hci_stack.state){ 1279 case HCI_STATE_INITIALIZING: 1280 // log_info("hci_init: substate %u\n", hci_stack.substate); 1281 if (hci_stack.substate % 2) { 1282 // odd: waiting for command completion 1283 return; 1284 } 1285 switch (hci_stack.substate >> 1){ 1286 case 0: // RESET 1287 hci_send_cmd(&hci_reset); 1288 1289 if (hci_stack.config == 0 || ((hci_uart_config_t *)hci_stack.config)->baudrate_main == 0){ 1290 // skip baud change 1291 hci_stack.substate = 4; // >> 1 = 2 1292 } 1293 break; 1294 case 1: // SEND BAUD CHANGE 1295 hci_stack.control->baudrate_cmd(hci_stack.config, ((hci_uart_config_t *)hci_stack.config)->baudrate_main, hci_stack.hci_packet_buffer); 1296 hci_send_cmd_packet(hci_stack.hci_packet_buffer, 3 + hci_stack.hci_packet_buffer[2]); 1297 break; 1298 case 2: // LOCAL BAUD CHANGE 1299 hci_stack.hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack.config)->baudrate_main); 1300 hci_stack.substate += 2; 1301 // break missing here for fall through 1302 1303 case 3: 1304 // Custom initialization 1305 if (hci_stack.control && hci_stack.control->next_cmd){ 1306 int valid_cmd = (*hci_stack.control->next_cmd)(hci_stack.config, hci_stack.hci_packet_buffer); 1307 if (valid_cmd){ 1308 int size = 3 + hci_stack.hci_packet_buffer[2]; 1309 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack.hci_packet_buffer, size); 1310 hci_stack.substate = 4; // more init commands 1311 break; 1312 } 1313 log_info("hci_run: init script done\n\r"); 1314 } 1315 // otherwise continue 1316 hci_send_cmd(&hci_read_bd_addr); 1317 break; 1318 case 4: 1319 hci_send_cmd(&hci_read_buffer_size); 1320 break; 1321 case 5: 1322 hci_send_cmd(&hci_read_local_supported_features); 1323 break; 1324 case 6: 1325 if (hci_le_supported()){ 1326 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1327 } else { 1328 // Kensington Bluetoot 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1329 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1330 } 1331 1332 // skip Classic init commands for LE only chipsets 1333 if (!hci_classic_supported()){ 1334 if (hci_le_supported()){ 1335 hci_stack.substate = 11 << 1; // skip all classic command 1336 } else { 1337 log_error("Neither BR/EDR nor LE supported"); 1338 hci_stack.substate = 13 << 1; // skip all 1339 } 1340 } 1341 break; 1342 case 7: 1343 if (hci_ssp_supported()){ 1344 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack.ssp_enable); 1345 break; 1346 } 1347 hci_stack.substate += 2; 1348 // break missing here for fall through 1349 1350 case 8: 1351 // ca. 15 sec 1352 hci_send_cmd(&hci_write_page_timeout, 0x6000); 1353 break; 1354 case 9: 1355 hci_send_cmd(&hci_write_class_of_device, hci_stack.class_of_device); 1356 break; 1357 case 10: 1358 if (hci_stack.local_name){ 1359 hci_send_cmd(&hci_write_local_name, hci_stack.local_name); 1360 } else { 1361 char hostname[30]; 1362 #ifdef EMBEDDED 1363 // BTstack-11:22:33:44:55:66 1364 strcpy(hostname, "BTstack "); 1365 strcat(hostname, bd_addr_to_str(hci_stack.local_bd_addr)); 1366 printf("---> Name %s\n", hostname); 1367 #else 1368 // hostname for POSIX systems 1369 gethostname(hostname, 30); 1370 hostname[29] = '\0'; 1371 #endif 1372 hci_send_cmd(&hci_write_local_name, hostname); 1373 } 1374 break; 1375 case 11: 1376 hci_send_cmd(&hci_write_scan_enable, (hci_stack.connectable << 1) | hci_stack.discoverable); // page scan 1377 if (!hci_le_supported()){ 1378 // SKIP LE init for Classic only configuration 1379 hci_stack.substate = 13 << 1; 1380 } 1381 break; 1382 1383 #ifdef HAVE_BLE 1384 // LE INIT 1385 case 12: 1386 hci_send_cmd(&hci_le_read_buffer_size); 1387 break; 1388 case 13: 1389 // LE Supported Host = 1, Simultaneous Host = 0 1390 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1391 break; 1392 #endif 1393 1394 // DONE 1395 case 14: 1396 // done. 1397 hci_stack.state = HCI_STATE_WORKING; 1398 hci_emit_state(); 1399 break; 1400 default: 1401 break; 1402 } 1403 hci_stack.substate++; 1404 break; 1405 1406 case HCI_STATE_HALTING: 1407 1408 log_info("HCI_STATE_HALTING\n"); 1409 // close all open connections 1410 connection = (hci_connection_t *) hci_stack.connections; 1411 if (connection){ 1412 1413 // send disconnect 1414 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1415 1416 log_info("HCI_STATE_HALTING, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1417 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1418 1419 // send disconnected event right away - causes higher layer connections to get closed, too. 1420 hci_shutdown_connection(connection); 1421 return; 1422 } 1423 log_info("HCI_STATE_HALTING, calling off\n"); 1424 1425 // switch mode 1426 hci_power_control_off(); 1427 1428 log_info("HCI_STATE_HALTING, emitting state\n"); 1429 hci_emit_state(); 1430 log_info("HCI_STATE_HALTING, done\n"); 1431 break; 1432 1433 case HCI_STATE_FALLING_ASLEEP: 1434 switch(hci_stack.substate) { 1435 case 0: 1436 log_info("HCI_STATE_FALLING_ASLEEP\n"); 1437 // close all open connections 1438 connection = (hci_connection_t *) hci_stack.connections; 1439 1440 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1441 // don't close connections, if H4 supports power management 1442 if (bt_control_iphone_power_management_enabled()){ 1443 connection = NULL; 1444 } 1445 #endif 1446 if (connection){ 1447 1448 // send disconnect 1449 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1450 1451 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1452 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1453 1454 // send disconnected event right away - causes higher layer connections to get closed, too. 1455 hci_shutdown_connection(connection); 1456 return; 1457 } 1458 1459 if (hci_classic_supported()){ 1460 // disable page and inquiry scan 1461 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1462 1463 log_info("HCI_STATE_HALTING, disabling inq scans\n"); 1464 hci_send_cmd(&hci_write_scan_enable, hci_stack.connectable << 1); // drop inquiry scan but keep page scan 1465 1466 // continue in next sub state 1467 hci_stack.substate++; 1468 break; 1469 } 1470 // fall through for ble-only chips 1471 1472 case 2: 1473 log_info("HCI_STATE_HALTING, calling sleep\n"); 1474 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1475 // don't actually go to sleep, if H4 supports power management 1476 if (bt_control_iphone_power_management_enabled()){ 1477 // SLEEP MODE reached 1478 hci_stack.state = HCI_STATE_SLEEPING; 1479 hci_emit_state(); 1480 break; 1481 } 1482 #endif 1483 // switch mode 1484 hci_power_control_sleep(); // changes hci_stack.state to SLEEP 1485 hci_emit_state(); 1486 break; 1487 1488 default: 1489 break; 1490 } 1491 break; 1492 1493 default: 1494 break; 1495 } 1496 } 1497 1498 int hci_send_cmd_packet(uint8_t *packet, int size){ 1499 bd_addr_t addr; 1500 hci_connection_t * conn; 1501 // house-keeping 1502 1503 // create_connection? 1504 if (IS_COMMAND(packet, hci_create_connection)){ 1505 bt_flip_addr(addr, &packet[3]); 1506 log_info("Create_connection to %s\n", bd_addr_to_str(addr)); 1507 conn = connection_for_address(addr); 1508 if (conn) { 1509 // if connection exists 1510 if (conn->state == OPEN) { 1511 // and OPEN, emit connection complete command 1512 hci_emit_connection_complete(conn, 0); 1513 } 1514 // otherwise, just ignore as it is already in the open process 1515 return 0; // don't sent packet to controller 1516 1517 } 1518 // create connection struct and register, state = SENT_CREATE_CONNECTION 1519 conn = create_connection_for_addr(addr); 1520 if (!conn){ 1521 // notify client that alloc failed 1522 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 1523 return 0; // don't sent packet to controller 1524 } 1525 conn->state = SENT_CREATE_CONNECTION; 1526 } 1527 1528 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1529 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1530 } 1531 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1532 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1533 } 1534 1535 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1536 if (hci_stack.remote_device_db){ 1537 bt_flip_addr(addr, &packet[3]); 1538 hci_stack.remote_device_db->delete_link_key(&addr); 1539 } 1540 } 1541 1542 #ifdef HAVE_BLE 1543 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 1544 hci_stack.adv_addr_type = packet[8]; 1545 } 1546 if (IS_COMMAND(packet, hci_le_set_random_address)){ 1547 bt_flip_addr(hci_stack.adv_address, &packet[3]); 1548 } 1549 #endif 1550 1551 1552 hci_stack.num_cmd_packets--; 1553 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1554 } 1555 1556 // Configure Secure Simple Pairing 1557 1558 // enable will enable SSP during init 1559 void hci_ssp_set_enable(int enable){ 1560 hci_stack.ssp_enable = enable; 1561 } 1562 1563 // if set, BTstack will respond to io capability request using authentication requirement 1564 void hci_ssp_set_io_capability(int io_capability){ 1565 hci_stack.ssp_io_capability = io_capability; 1566 } 1567 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 1568 hci_stack.ssp_authentication_requirement = authentication_requirement; 1569 } 1570 1571 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 1572 void hci_ssp_set_auto_accept(int auto_accept){ 1573 hci_stack.ssp_auto_accept = auto_accept; 1574 } 1575 1576 /** 1577 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1578 */ 1579 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1580 va_list argptr; 1581 va_start(argptr, cmd); 1582 uint16_t size = hci_create_cmd_internal(hci_stack.hci_packet_buffer, cmd, argptr); 1583 va_end(argptr); 1584 return hci_send_cmd_packet(hci_stack.hci_packet_buffer, size); 1585 } 1586 1587 // Create various non-HCI events. 1588 // TODO: generalize, use table similar to hci_create_command 1589 1590 void hci_emit_state(){ 1591 log_info("BTSTACK_EVENT_STATE %u", hci_stack.state); 1592 uint8_t event[3]; 1593 event[0] = BTSTACK_EVENT_STATE; 1594 event[1] = sizeof(event) - 2; 1595 event[2] = hci_stack.state; 1596 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1597 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1598 } 1599 1600 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 1601 uint8_t event[13]; 1602 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1603 event[1] = sizeof(event) - 2; 1604 event[2] = status; 1605 bt_store_16(event, 3, conn->con_handle); 1606 bt_flip_addr(&event[5], conn->address); 1607 event[11] = 1; // ACL connection 1608 event[12] = 0; // encryption disabled 1609 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1610 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1611 } 1612 1613 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 1614 uint8_t event[6]; 1615 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1616 event[1] = sizeof(event) - 2; 1617 event[2] = 0; // status = OK 1618 bt_store_16(event, 3, handle); 1619 event[5] = reason; 1620 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1621 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1622 } 1623 1624 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1625 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 1626 uint8_t event[4]; 1627 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 1628 event[1] = sizeof(event) - 2; 1629 bt_store_16(event, 2, conn->con_handle); 1630 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1631 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1632 } 1633 1634 void hci_emit_nr_connections_changed(){ 1635 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 1636 uint8_t event[3]; 1637 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 1638 event[1] = sizeof(event) - 2; 1639 event[2] = nr_hci_connections(); 1640 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1641 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1642 } 1643 1644 void hci_emit_hci_open_failed(){ 1645 log_info("BTSTACK_EVENT_POWERON_FAILED"); 1646 uint8_t event[2]; 1647 event[0] = BTSTACK_EVENT_POWERON_FAILED; 1648 event[1] = sizeof(event) - 2; 1649 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1650 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1651 } 1652 1653 #ifndef EMBEDDED 1654 void hci_emit_btstack_version() { 1655 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 1656 uint8_t event[6]; 1657 event[0] = BTSTACK_EVENT_VERSION; 1658 event[1] = sizeof(event) - 2; 1659 event[2] = BTSTACK_MAJOR; 1660 event[3] = BTSTACK_MINOR; 1661 bt_store_16(event, 4, BTSTACK_REVISION); 1662 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1663 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1664 } 1665 #endif 1666 1667 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 1668 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 1669 uint8_t event[3]; 1670 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 1671 event[1] = sizeof(event) - 2; 1672 event[2] = enabled; 1673 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1674 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1675 } 1676 1677 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 1678 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 1679 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 1680 event[1] = sizeof(event) - 2 - 1; 1681 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 1682 bt_flip_addr(&event[3], *addr); 1683 memcpy(&event[9], name, 248); 1684 1685 event[9+248] = 0; // assert \0 for log_info 1686 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(*addr), &event[9]); 1687 1688 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 1689 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 1690 } 1691 1692 void hci_emit_discoverable_enabled(uint8_t enabled){ 1693 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 1694 uint8_t event[3]; 1695 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 1696 event[1] = sizeof(event) - 2; 1697 event[2] = enabled; 1698 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1699 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1700 } 1701 1702 // GAP API 1703 /** 1704 * @bbrief enable/disable bonding. default is enabled 1705 * @praram enabled 1706 */ 1707 void gap_set_bondable_mode(int enable){ 1708 hci_stack.bondable = enable ? 1 : 0; 1709 } 1710 1711 /** 1712 * @brief get current security level 1713 */ 1714 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 1715 hci_connection_t * connection = hci_connection_for_handle(con_handle); 1716 if (!connection) return LEVEL_0; 1717 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 1718 switch (connection->link_key_type){ 1719 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 1720 return LEVEL_4; 1721 case COMBINATION_KEY: 1722 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 1723 return LEVEL_3; 1724 case DEBUG_COMBINATION_KEY: 1725 default: 1726 return LEVEL_2; 1727 } 1728 } 1729 1730 /** 1731 * @brief request connection to device to 1732 * @result GAP_AUTHENTICATION_RESULT 1733 */ 1734 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 1735 } 1736 1737