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 48 #include <stdarg.h> 49 #include <string.h> 50 #include <stdio.h> 51 52 #ifndef EMBEDDED 53 #include <unistd.h> // gethostbyname 54 #include <btstack/version.h> 55 #endif 56 57 #include "btstack_memory.h" 58 #include "debug.h" 59 #include "hci_dump.h" 60 61 #include <btstack/hci_cmds.h> 62 63 #define HCI_CONNECTION_TIMEOUT_MS 10000 64 65 #define HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP 11 66 67 #ifdef USE_BLUETOOL 68 #include "bt_control_iphone.h" 69 #endif 70 71 static void hci_update_scan_enable(void); 72 73 // the STACK is here 74 static hci_stack_t hci_stack; 75 76 /** 77 * get connection for a given handle 78 * 79 * @return connection OR NULL, if not found 80 */ 81 hci_connection_t * connection_for_handle(hci_con_handle_t con_handle){ 82 linked_item_t *it; 83 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 84 if ( ((hci_connection_t *) it)->con_handle == con_handle){ 85 return (hci_connection_t *) it; 86 } 87 } 88 return NULL; 89 } 90 91 static void hci_connection_timeout_handler(timer_source_t *timer){ 92 hci_connection_t * connection = (hci_connection_t *) linked_item_get_user(&timer->item); 93 #ifdef HAVE_TIME 94 struct timeval tv; 95 gettimeofday(&tv, NULL); 96 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 97 // connections might be timed out 98 hci_emit_l2cap_check_timeout(connection); 99 } 100 #endif 101 #ifdef HAVE_TICK 102 if (embedded_get_ticks() > connection->timestamp + embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 103 // connections might be timed out 104 hci_emit_l2cap_check_timeout(connection); 105 } 106 #endif 107 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 108 run_loop_add_timer(timer); 109 } 110 111 static void hci_connection_timestamp(hci_connection_t *connection){ 112 #ifdef HAVE_TIME 113 gettimeofday(&connection->timestamp, NULL); 114 #endif 115 #ifdef HAVE_TICK 116 connection->timestamp = embedded_get_ticks(); 117 #endif 118 } 119 120 /** 121 * create connection for given address 122 * 123 * @return connection OR NULL, if no memory left 124 */ 125 static hci_connection_t * create_connection_for_addr(bd_addr_t addr){ 126 hci_connection_t * conn = (hci_connection_t *) btstack_memory_hci_connection_get(); 127 if (!conn) return NULL; 128 BD_ADDR_COPY(conn->address, addr); 129 conn->con_handle = 0xffff; 130 conn->authentication_flags = AUTH_FLAGS_NONE; 131 linked_item_set_user(&conn->timeout.item, conn); 132 conn->timeout.process = hci_connection_timeout_handler; 133 hci_connection_timestamp(conn); 134 conn->acl_recombination_length = 0; 135 conn->acl_recombination_pos = 0; 136 conn->num_acl_packets_sent = 0; 137 linked_list_add(&hci_stack.connections, (linked_item_t *) conn); 138 return conn; 139 } 140 141 /** 142 * get connection for given address 143 * 144 * @return connection OR NULL, if not found 145 */ 146 static hci_connection_t * connection_for_address(bd_addr_t address){ 147 linked_item_t *it; 148 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 149 if ( ! BD_ADDR_CMP( ((hci_connection_t *) it)->address, address) ){ 150 return (hci_connection_t *) it; 151 } 152 } 153 return NULL; 154 } 155 156 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 157 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 158 } 159 160 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 161 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 162 } 163 164 165 /** 166 * add authentication flags and reset timer 167 */ 168 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 169 bd_addr_t addr; 170 bt_flip_addr(addr, *(bd_addr_t *) bd_addr); 171 hci_connection_t * conn = connection_for_address(addr); 172 if (conn) { 173 connectionSetAuthenticationFlags(conn, flags); 174 hci_connection_timestamp(conn); 175 } 176 } 177 178 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 179 hci_connection_t * conn = connection_for_handle(handle); 180 if (!conn) return 0; 181 if (!conn->authentication_flags) return 0; 182 if (conn->authentication_flags & SENT_LINK_KEY_REPLY) return 0; 183 if (conn->authentication_flags & RECV_LINK_KEY_NOTIFICATION) return 0; 184 return 1; 185 } 186 187 void hci_drop_link_key_for_bd_addr(bd_addr_t *addr){ 188 if (hci_stack.remote_device_db) { 189 hci_stack.remote_device_db->delete_link_key(addr); 190 } 191 } 192 193 194 /** 195 * count connections 196 */ 197 static int nr_hci_connections(void){ 198 int count = 0; 199 linked_item_t *it; 200 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next, count++); 201 return count; 202 } 203 204 /** 205 * Dummy handler called by HCI 206 */ 207 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 208 } 209 210 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 211 hci_connection_t * connection = connection_for_handle(handle); 212 if (!connection) { 213 log_error("hci_number_outgoing_packets connectino for handle %u does not exist!\n", handle); 214 return 0; 215 } 216 return connection->num_acl_packets_sent; 217 } 218 219 uint8_t hci_number_free_acl_slots(){ 220 uint8_t free_slots = hci_stack.total_num_acl_packets; 221 linked_item_t *it; 222 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 223 hci_connection_t * connection = (hci_connection_t *) it; 224 if (free_slots < connection->num_acl_packets_sent) { 225 log_error("hci_number_free_acl_slots: sum of outgoing packets > total acl packets!\n"); 226 return 0; 227 } 228 free_slots -= connection->num_acl_packets_sent; 229 } 230 return free_slots; 231 } 232 233 int hci_can_send_packet_now(uint8_t packet_type){ 234 235 // check for async hci transport implementations 236 if (hci_stack.hci_transport->can_send_packet_now){ 237 if (!hci_stack.hci_transport->can_send_packet_now(packet_type)){ 238 return 0; 239 } 240 } 241 242 // check regular Bluetooth flow control 243 switch (packet_type) { 244 case HCI_ACL_DATA_PACKET: 245 return hci_number_free_acl_slots(); 246 case HCI_COMMAND_DATA_PACKET: 247 return hci_stack.num_cmd_packets; 248 default: 249 return 0; 250 } 251 } 252 253 int hci_send_acl_packet(uint8_t *packet, int size){ 254 255 // check for free places on BT module 256 if (!hci_number_free_acl_slots()) return BTSTACK_ACL_BUFFERS_FULL; 257 258 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 259 hci_connection_t *connection = connection_for_handle( con_handle); 260 if (!connection) return 0; 261 hci_connection_timestamp(connection); 262 263 // count packet 264 connection->num_acl_packets_sent++; 265 // log_info("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 266 267 // send packet 268 int err = hci_stack.hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 269 270 return err; 271 } 272 273 static void acl_handler(uint8_t *packet, int size){ 274 275 // get info 276 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 277 hci_connection_t *conn = connection_for_handle(con_handle); 278 uint8_t acl_flags = READ_ACL_FLAGS(packet); 279 uint16_t acl_length = READ_ACL_LENGTH(packet); 280 281 // ignore non-registered handle 282 if (!conn){ 283 log_error( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 284 return; 285 } 286 287 // update idle timestamp 288 hci_connection_timestamp(conn); 289 290 // handle different packet types 291 switch (acl_flags & 0x03) { 292 293 case 0x01: // continuation fragment 294 295 // sanity check 296 if (conn->acl_recombination_pos == 0) { 297 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 298 return; 299 } 300 301 // append fragment payload (header already stored) 302 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 303 conn->acl_recombination_pos += acl_length; 304 305 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", acl_length, 306 // conn->acl_recombination_pos, conn->acl_recombination_length); 307 308 // forward complete L2CAP packet if complete. 309 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 310 311 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 312 // reset recombination buffer 313 conn->acl_recombination_length = 0; 314 conn->acl_recombination_pos = 0; 315 } 316 break; 317 318 case 0x02: { // first fragment 319 320 // sanity check 321 if (conn->acl_recombination_pos) { 322 log_error( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 323 return; 324 } 325 326 // peek into L2CAP packet! 327 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 328 329 // log_error( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 330 331 // compare fragment size to L2CAP packet size 332 if (acl_length >= l2cap_length + 4){ 333 334 // forward fragment as L2CAP packet 335 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 336 337 } else { 338 // store first fragment and tweak acl length for complete package 339 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 340 conn->acl_recombination_pos = acl_length + 4; 341 conn->acl_recombination_length = l2cap_length; 342 bt_store_16(conn->acl_recombination_buffer, 2, l2cap_length +4); 343 } 344 break; 345 346 } 347 default: 348 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 349 return; 350 } 351 352 // execute main loop 353 hci_run(); 354 } 355 356 static void hci_shutdown_connection(hci_connection_t *conn){ 357 log_info("Connection closed: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 358 359 // cancel all l2cap connections 360 hci_emit_disconnection_complete(conn->con_handle, 0x16); // terminated by local host 361 362 run_loop_remove_timer(&conn->timeout); 363 364 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 365 btstack_memory_hci_connection_free( conn ); 366 367 // now it's gone 368 hci_emit_nr_connections_changed(); 369 } 370 371 static const uint16_t packet_type_sizes[] = { 372 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 373 HCI_ACL_DH1_SIZE, 0, 0, 0, 374 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 375 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 376 }; 377 static const uint8_t packet_type_feature_requirement_bit[] = { 378 0, // 3 slot packets 379 1, // 5 slot packets 380 25, // EDR 2 mpbs 381 26, // EDR 3 mbps 382 39, // 3 slot EDR packts 383 40, // 5 slot EDR packet 384 }; 385 static const uint16_t packet_type_feature_packet_mask[] = { 386 0x0f00, // 3 slot packets 387 0xf000, // 5 slot packets 388 0x1102, // EDR 2 mpbs 389 0x2204, // EDR 3 mbps 390 0x0300, // 3 slot EDR packts 391 0x3000, // 5 slot EDR packet 392 }; 393 394 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 395 // enable packet types based on size 396 uint16_t packet_types = 0; 397 int i; 398 for (i=0;i<16;i++){ 399 if (packet_type_sizes[i] == 0) continue; 400 if (packet_type_sizes[i] <= buffer_size){ 401 packet_types |= 1 << i; 402 } 403 } 404 // disable packet types due to missing local supported features 405 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 406 int bit_idx = packet_type_feature_requirement_bit[i]; 407 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 408 if (feature_set) continue; 409 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 410 packet_types &= ~packet_type_feature_packet_mask[i]; 411 } 412 // flip bits for "may not be used" 413 packet_types ^= 0x3306; 414 return packet_types; 415 } 416 417 uint16_t hci_usable_acl_packet_types(void){ 418 return hci_stack.packet_types; 419 } 420 421 uint8_t* hci_get_outgoing_acl_packet_buffer(void){ 422 // hci packet buffer is >= acl data packet length 423 return hci_stack.hci_packet_buffer; 424 } 425 426 uint16_t hci_max_acl_data_packet_length(void){ 427 return hci_stack.acl_data_packet_length; 428 } 429 430 int hci_ssp_supported(void){ 431 // No 51, byte 6, bit 3 432 return (hci_stack.local_supported_features[6] & (1 << 3)) != 0; 433 } 434 435 int hci_classic_supported(void){ 436 // No 37, byte 4, bit 5, = No BR/EDR Support 437 return (hci_stack.local_supported_features[4] & (1 << 5)) == 0; 438 } 439 440 int hci_le_supported(void){ 441 // No 37, byte 4, bit 6 = LE Supported (Controller) 442 #ifdef HAVE_BLE 443 return (hci_stack.local_supported_features[4] & (1 << 6)) != 0; 444 #else 445 return 0; 446 #endif 447 } 448 449 // avoid huge local variables 450 #ifndef EMBEDDED 451 static device_name_t device_name; 452 #endif 453 static void event_handler(uint8_t *packet, int size){ 454 bd_addr_t addr; 455 uint8_t link_type; 456 hci_con_handle_t handle; 457 hci_connection_t * conn; 458 int i; 459 460 // printf("HCI:EVENT:%02x\n", packet[0]); 461 462 switch (packet[0]) { 463 464 case HCI_EVENT_COMMAND_COMPLETE: 465 // get num cmd packets 466 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack.num_cmd_packets, packet[2]); 467 hci_stack.num_cmd_packets = packet[2]; 468 469 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 470 // from offset 5 471 // status 472 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 473 hci_stack.acl_data_packet_length = READ_BT_16(packet, 6); 474 // ignore: SCO data packet len (8) 475 hci_stack.total_num_acl_packets = packet[9]; 476 // ignore: total num SCO packets 477 if (hci_stack.state == HCI_STATE_INITIALIZING){ 478 // determine usable ACL payload size 479 if (HCI_ACL_PAYLOAD_SIZE < hci_stack.acl_data_packet_length){ 480 hci_stack.acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 481 } 482 log_info("hci_read_buffer_size: used size %u, count %u\n", 483 hci_stack.acl_data_packet_length, hci_stack.total_num_acl_packets); 484 } 485 } 486 // Dump local address 487 if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)) { 488 bt_flip_addr(hci_stack.local_bd_addr, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1]); 489 log_info("Local Address, Status: 0x%02x: Addr: %s\n", 490 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack.local_bd_addr)); 491 } 492 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 493 hci_emit_discoverable_enabled(hci_stack.discoverable); 494 } 495 // Note: HCI init checks 496 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_features)){ 497 memcpy(hci_stack.local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 498 log_info("Local Supported Features: 0x%02x%02x%02x%02x%02x%02x%02x%02x", 499 hci_stack.local_supported_features[0], hci_stack.local_supported_features[1], 500 hci_stack.local_supported_features[2], hci_stack.local_supported_features[3], 501 hci_stack.local_supported_features[4], hci_stack.local_supported_features[5], 502 hci_stack.local_supported_features[6], hci_stack.local_supported_features[7]); 503 504 // determine usable ACL packet types based buffer size and supported features 505 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]); 506 log_info("packet types %04x", hci_stack.packet_types); 507 508 // Classic/LE 509 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 510 } 511 break; 512 513 case HCI_EVENT_COMMAND_STATUS: 514 // get num cmd packets 515 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack.num_cmd_packets, packet[3]); 516 hci_stack.num_cmd_packets = packet[3]; 517 break; 518 519 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 520 for (i=0; i<packet[2];i++){ 521 handle = READ_BT_16(packet, 3 + 2*i); 522 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 523 conn = connection_for_handle(handle); 524 if (!conn){ 525 log_error("hci_number_completed_packet lists unused con handle %u\n", handle); 526 continue; 527 } 528 conn->num_acl_packets_sent -= num_packets; 529 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 530 } 531 break; 532 533 case HCI_EVENT_CONNECTION_REQUEST: 534 bt_flip_addr(addr, &packet[2]); 535 // TODO: eval COD 8-10 536 link_type = packet[11]; 537 log_info("Connection_incoming: %s, type %u\n", bd_addr_to_str(addr), link_type); 538 if (link_type == 1) { // ACL 539 conn = connection_for_address(addr); 540 if (!conn) { 541 conn = create_connection_for_addr(addr); 542 } 543 if (!conn) { 544 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 545 hci_stack.decline_reason = 0x0d; 546 BD_ADDR_COPY(hci_stack.decline_addr, addr); 547 break; 548 } 549 conn->state = RECEIVED_CONNECTION_REQUEST; 550 hci_run(); 551 } else { 552 // SYNCHRONOUS CONNECTION LIMIT TO A DEVICE EXCEEDED (0X0A) 553 hci_stack.decline_reason = 0x0a; 554 BD_ADDR_COPY(hci_stack.decline_addr, addr); 555 } 556 break; 557 558 case HCI_EVENT_CONNECTION_COMPLETE: 559 // Connection management 560 bt_flip_addr(addr, &packet[5]); 561 log_info("Connection_complete (status=%u) %s\n", packet[2], bd_addr_to_str(addr)); 562 conn = connection_for_address(addr); 563 if (conn) { 564 if (!packet[2]){ 565 conn->state = OPEN; 566 conn->con_handle = READ_BT_16(packet, 3); 567 568 // restart timer 569 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 570 run_loop_add_timer(&conn->timeout); 571 572 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 573 574 hci_emit_nr_connections_changed(); 575 } else { 576 // connection failed, remove entry 577 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 578 btstack_memory_hci_connection_free( conn ); 579 580 // if authentication error, also delete link key 581 if (packet[2] == 0x05) { 582 hci_drop_link_key_for_bd_addr(&addr); 583 } 584 } 585 } 586 break; 587 588 case HCI_EVENT_LINK_KEY_REQUEST: 589 log_info("HCI_EVENT_LINK_KEY_REQUEST\n"); 590 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 591 if (!hci_stack.remote_device_db) break; 592 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 593 hci_run(); 594 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 595 return; 596 597 case HCI_EVENT_LINK_KEY_NOTIFICATION: 598 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_NOTIFICATION); 599 if (!hci_stack.remote_device_db) break; 600 bt_flip_addr(addr, &packet[2]); 601 hci_stack.remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8]); 602 // still forward event to allow dismiss of pairing dialog 603 break; 604 605 case HCI_EVENT_PIN_CODE_REQUEST: 606 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_PIN_CODE_REQUEST); 607 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 608 if (!hci_stack.remote_device_db) break; 609 bt_flip_addr(addr, &packet[2]); 610 hci_stack.remote_device_db->delete_link_key(&addr); 611 break; 612 613 case HCI_EVENT_IO_CAPABILITY_REQUEST: 614 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 615 if (hci_stack.ssp_io_capability == SSP_IO_CAPABILITY_UNKNOWN) break; 616 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 617 break; 618 619 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 620 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_USER_CONFIRM_REQUEST); 621 if (!hci_stack.ssp_auto_accept) break; 622 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 623 break; 624 625 case HCI_EVENT_USER_PASSKEY_REQUEST: 626 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_USER_PASSKEY_REQUEST); 627 if (!hci_stack.ssp_auto_accept) break; 628 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 629 break; 630 631 #ifndef EMBEDDED 632 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 633 if (!hci_stack.remote_device_db) break; 634 if (packet[2]) break; // status not ok 635 bt_flip_addr(addr, &packet[3]); 636 // fix for invalid remote names - terminate on 0xff 637 for (i=0; i<248;i++){ 638 if (packet[9+i] == 0xff){ 639 packet[9+i] = 0; 640 break; 641 } 642 } 643 memset(&device_name, 0, sizeof(device_name_t)); 644 strncpy((char*) device_name, (char*) &packet[9], 248); 645 hci_stack.remote_device_db->put_name(&addr, &device_name); 646 break; 647 648 case HCI_EVENT_INQUIRY_RESULT: 649 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 650 if (!hci_stack.remote_device_db) break; 651 // first send inq result packet 652 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 653 // then send cached remote names 654 for (i=0; i<packet[2];i++){ 655 bt_flip_addr(addr, &packet[3+i*6]); 656 if (hci_stack.remote_device_db->get_name(&addr, &device_name)){ 657 hci_emit_remote_name_cached(&addr, &device_name); 658 } 659 } 660 return; 661 #endif 662 663 case HCI_EVENT_DISCONNECTION_COMPLETE: 664 if (!packet[2]){ 665 handle = READ_BT_16(packet, 3); 666 hci_connection_t * conn = connection_for_handle(handle); 667 if (conn) { 668 hci_shutdown_connection(conn); 669 } 670 } 671 break; 672 673 case HCI_EVENT_HARDWARE_ERROR: 674 if(hci_stack.control->hw_error){ 675 (*hci_stack.control->hw_error)(); 676 } 677 break; 678 679 #ifdef HAVE_BLE 680 case HCI_EVENT_LE_META: 681 switch (packet[2]) { 682 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 683 // Connection management 684 bt_flip_addr(addr, &packet[8]); 685 log_info("LE Connection_complete (status=%u) %s\n", packet[3], bd_addr_to_str(addr)); 686 // LE connections are auto-accepted, so just create a connection if there isn't one already 687 conn = connection_for_address(addr); 688 if (packet[3]){ 689 if (conn){ 690 // outgoing connection failed, remove entry 691 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 692 btstack_memory_hci_connection_free( conn ); 693 694 } 695 // if authentication error, also delete link key 696 if (packet[3] == 0x05) { 697 hci_drop_link_key_for_bd_addr(&addr); 698 } 699 break; 700 } 701 if (!conn){ 702 conn = create_connection_for_addr(addr); 703 } 704 if (!conn){ 705 // no memory 706 break; 707 } 708 709 conn->state = OPEN; 710 conn->con_handle = READ_BT_16(packet, 4); 711 712 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 713 714 // restart timer 715 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 716 // run_loop_add_timer(&conn->timeout); 717 718 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 719 720 hci_emit_nr_connections_changed(); 721 break; 722 723 default: 724 break; 725 } 726 break; 727 #endif 728 729 default: 730 break; 731 } 732 733 // handle BT initialization 734 if (hci_stack.state == HCI_STATE_INITIALIZING){ 735 // handle H4 synchronization loss on restart 736 // if (hci_stack.substate == 1 && packet[0] == HCI_EVENT_HARDWARE_ERROR){ 737 // hci_stack.substate = 0; 738 // } 739 // handle normal init sequence 740 if (hci_stack.substate % 2){ 741 // odd: waiting for event 742 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE || packet[0] == HCI_EVENT_COMMAND_STATUS){ 743 hci_stack.substate++; 744 } 745 } 746 } 747 748 // help with BT sleep 749 if (hci_stack.state == HCI_STATE_FALLING_ASLEEP 750 && hci_stack.substate == 1 751 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 752 hci_stack.substate++; 753 } 754 755 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 756 757 // execute main loop 758 hci_run(); 759 } 760 761 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 762 switch (packet_type) { 763 case HCI_EVENT_PACKET: 764 event_handler(packet, size); 765 break; 766 case HCI_ACL_DATA_PACKET: 767 acl_handler(packet, size); 768 break; 769 default: 770 break; 771 } 772 } 773 774 /** Register HCI packet handlers */ 775 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 776 hci_stack.packet_handler = handler; 777 } 778 779 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 780 781 // reference to use transport layer implementation 782 hci_stack.hci_transport = transport; 783 784 // references to used control implementation 785 hci_stack.control = control; 786 787 // reference to used config 788 hci_stack.config = config; 789 790 // no connections yet 791 hci_stack.connections = NULL; 792 hci_stack.discoverable = 0; 793 hci_stack.connectable = 0; 794 795 // no pending cmds 796 hci_stack.decline_reason = 0; 797 hci_stack.new_scan_enable_value = 0xff; 798 799 // higher level handler 800 hci_stack.packet_handler = dummy_handler; 801 802 // store and open remote device db 803 hci_stack.remote_device_db = remote_device_db; 804 if (hci_stack.remote_device_db) { 805 hci_stack.remote_device_db->open(); 806 } 807 808 // max acl payload size defined in config.h 809 hci_stack.acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 810 811 // register packet handlers with transport 812 transport->register_packet_handler(&packet_handler); 813 814 hci_stack.state = HCI_STATE_OFF; 815 816 // class of device 817 hci_stack.class_of_device = 0x007a020c; // Smartphone 818 819 // Secure Simple Pairing 820 hci_stack.ssp_enable = 0; 821 hci_stack.ssp_io_capability = SSP_IO_CAPABILITY_UNKNOWN; 822 hci_stack.ssp_authentication_requirement = 0; 823 } 824 825 void hci_close(){ 826 // close remote device db 827 if (hci_stack.remote_device_db) { 828 hci_stack.remote_device_db->close(); 829 } 830 while (hci_stack.connections) { 831 hci_shutdown_connection((hci_connection_t *) hci_stack.connections); 832 } 833 hci_power_control(HCI_POWER_OFF); 834 } 835 836 // State-Module-Driver overview 837 // state module low-level 838 // HCI_STATE_OFF off close 839 // HCI_STATE_INITIALIZING, on open 840 // HCI_STATE_WORKING, on open 841 // HCI_STATE_HALTING, on open 842 // HCI_STATE_SLEEPING, off/sleep close 843 // HCI_STATE_FALLING_ASLEEP on open 844 845 static int hci_power_control_on(void){ 846 847 // power on 848 int err = 0; 849 if (hci_stack.control && hci_stack.control->on){ 850 err = (*hci_stack.control->on)(hci_stack.config); 851 } 852 if (err){ 853 log_error( "POWER_ON failed\n"); 854 hci_emit_hci_open_failed(); 855 return err; 856 } 857 858 // open low-level device 859 err = hci_stack.hci_transport->open(hci_stack.config); 860 if (err){ 861 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 862 if (hci_stack.control && hci_stack.control->off){ 863 (*hci_stack.control->off)(hci_stack.config); 864 } 865 hci_emit_hci_open_failed(); 866 return err; 867 } 868 return 0; 869 } 870 871 static void hci_power_control_off(void){ 872 873 log_info("hci_power_control_off\n"); 874 875 // close low-level device 876 hci_stack.hci_transport->close(hci_stack.config); 877 878 log_info("hci_power_control_off - hci_transport closed\n"); 879 880 // power off 881 if (hci_stack.control && hci_stack.control->off){ 882 (*hci_stack.control->off)(hci_stack.config); 883 } 884 885 log_info("hci_power_control_off - control closed\n"); 886 887 hci_stack.state = HCI_STATE_OFF; 888 } 889 890 static void hci_power_control_sleep(void){ 891 892 log_info("hci_power_control_sleep\n"); 893 894 #if 0 895 // don't close serial port during sleep 896 897 // close low-level device 898 hci_stack.hci_transport->close(hci_stack.config); 899 #endif 900 901 // sleep mode 902 if (hci_stack.control && hci_stack.control->sleep){ 903 (*hci_stack.control->sleep)(hci_stack.config); 904 } 905 906 hci_stack.state = HCI_STATE_SLEEPING; 907 } 908 909 static int hci_power_control_wake(void){ 910 911 log_info("hci_power_control_wake\n"); 912 913 // wake on 914 if (hci_stack.control && hci_stack.control->wake){ 915 (*hci_stack.control->wake)(hci_stack.config); 916 } 917 918 #if 0 919 // open low-level device 920 int err = hci_stack.hci_transport->open(hci_stack.config); 921 if (err){ 922 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 923 if (hci_stack.control && hci_stack.control->off){ 924 (*hci_stack.control->off)(hci_stack.config); 925 } 926 hci_emit_hci_open_failed(); 927 return err; 928 } 929 #endif 930 931 return 0; 932 } 933 934 935 int hci_power_control(HCI_POWER_MODE power_mode){ 936 937 log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack.state); 938 939 int err = 0; 940 switch (hci_stack.state){ 941 942 case HCI_STATE_OFF: 943 switch (power_mode){ 944 case HCI_POWER_ON: 945 err = hci_power_control_on(); 946 if (err) return err; 947 // set up state machine 948 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 949 hci_stack.state = HCI_STATE_INITIALIZING; 950 hci_stack.substate = 0; 951 break; 952 case HCI_POWER_OFF: 953 // do nothing 954 break; 955 case HCI_POWER_SLEEP: 956 // do nothing (with SLEEP == OFF) 957 break; 958 } 959 break; 960 961 case HCI_STATE_INITIALIZING: 962 switch (power_mode){ 963 case HCI_POWER_ON: 964 // do nothing 965 break; 966 case HCI_POWER_OFF: 967 // no connections yet, just turn it off 968 hci_power_control_off(); 969 break; 970 case HCI_POWER_SLEEP: 971 // no connections yet, just turn it off 972 hci_power_control_sleep(); 973 break; 974 } 975 break; 976 977 case HCI_STATE_WORKING: 978 switch (power_mode){ 979 case HCI_POWER_ON: 980 // do nothing 981 break; 982 case HCI_POWER_OFF: 983 // see hci_run 984 hci_stack.state = HCI_STATE_HALTING; 985 break; 986 case HCI_POWER_SLEEP: 987 // see hci_run 988 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 989 hci_stack.substate = 0; 990 break; 991 } 992 break; 993 994 case HCI_STATE_HALTING: 995 switch (power_mode){ 996 case HCI_POWER_ON: 997 // set up state machine 998 hci_stack.state = HCI_STATE_INITIALIZING; 999 hci_stack.substate = 0; 1000 break; 1001 case HCI_POWER_OFF: 1002 // do nothing 1003 break; 1004 case HCI_POWER_SLEEP: 1005 // see hci_run 1006 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 1007 hci_stack.substate = 0; 1008 break; 1009 } 1010 break; 1011 1012 case HCI_STATE_FALLING_ASLEEP: 1013 switch (power_mode){ 1014 case HCI_POWER_ON: 1015 1016 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1017 // nothing to do, if H4 supports power management 1018 if (bt_control_iphone_power_management_enabled()){ 1019 hci_stack.state = HCI_STATE_INITIALIZING; 1020 hci_stack.substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1021 break; 1022 } 1023 #endif 1024 // set up state machine 1025 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 1026 hci_stack.state = HCI_STATE_INITIALIZING; 1027 hci_stack.substate = 0; 1028 break; 1029 case HCI_POWER_OFF: 1030 // see hci_run 1031 hci_stack.state = HCI_STATE_HALTING; 1032 break; 1033 case HCI_POWER_SLEEP: 1034 // do nothing 1035 break; 1036 } 1037 break; 1038 1039 case HCI_STATE_SLEEPING: 1040 switch (power_mode){ 1041 case HCI_POWER_ON: 1042 1043 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1044 // nothing to do, if H4 supports power management 1045 if (bt_control_iphone_power_management_enabled()){ 1046 hci_stack.state = HCI_STATE_INITIALIZING; 1047 hci_stack.substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1048 hci_update_scan_enable(); 1049 break; 1050 } 1051 #endif 1052 err = hci_power_control_wake(); 1053 if (err) return err; 1054 // set up state machine 1055 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 1056 hci_stack.state = HCI_STATE_INITIALIZING; 1057 hci_stack.substate = 0; 1058 break; 1059 case HCI_POWER_OFF: 1060 hci_stack.state = HCI_STATE_HALTING; 1061 break; 1062 case HCI_POWER_SLEEP: 1063 // do nothing 1064 break; 1065 } 1066 break; 1067 } 1068 1069 // create internal event 1070 hci_emit_state(); 1071 1072 // trigger next/first action 1073 hci_run(); 1074 1075 return 0; 1076 } 1077 1078 static void hci_update_scan_enable(void){ 1079 // 2 = page scan, 1 = inq scan 1080 hci_stack.new_scan_enable_value = hci_stack.connectable << 1 | hci_stack.discoverable; 1081 hci_run(); 1082 } 1083 1084 void hci_discoverable_control(uint8_t enable){ 1085 if (enable) enable = 1; // normalize argument 1086 1087 if (hci_stack.discoverable == enable){ 1088 hci_emit_discoverable_enabled(hci_stack.discoverable); 1089 return; 1090 } 1091 1092 hci_stack.discoverable = enable; 1093 hci_update_scan_enable(); 1094 } 1095 1096 void hci_connectable_control(uint8_t enable){ 1097 if (enable) enable = 1; // normalize argument 1098 1099 // don't emit event 1100 if (hci_stack.connectable == enable) return; 1101 1102 hci_stack.connectable = enable; 1103 hci_update_scan_enable(); 1104 } 1105 1106 void hci_run(){ 1107 1108 hci_connection_t * connection; 1109 linked_item_t * it; 1110 1111 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1112 1113 // global/non-connection oriented commands 1114 1115 // decline incoming connections 1116 if (hci_stack.decline_reason){ 1117 uint8_t reason = hci_stack.decline_reason; 1118 hci_stack.decline_reason = 0; 1119 hci_send_cmd(&hci_reject_connection_request, hci_stack.decline_addr, reason); 1120 return; 1121 } 1122 1123 // send scan enable 1124 if (hci_stack.state == HCI_STATE_WORKING && hci_stack.new_scan_enable_value != 0xff){ 1125 hci_send_cmd(&hci_write_scan_enable, hci_stack.new_scan_enable_value); 1126 hci_stack.new_scan_enable_value = 0xff; 1127 return; 1128 } 1129 1130 // send pending HCI commands 1131 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 1132 1133 connection = (hci_connection_t *) it; 1134 1135 if (connection->state == RECEIVED_CONNECTION_REQUEST){ 1136 log_info("sending hci_accept_connection_request\n"); 1137 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 1138 connection->state = ACCEPTED_CONNECTION_REQUEST; 1139 return; 1140 } 1141 1142 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 1143 link_key_t link_key; 1144 log_info("responding to link key request\n"); 1145 if ( hci_stack.remote_device_db->get_link_key( &connection->address, &link_key)){ 1146 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 1147 } else { 1148 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 1149 } 1150 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 1151 return; 1152 } 1153 1154 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 1155 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack.ssp_io_capability, NULL, hci_stack.ssp_authentication_requirement); 1156 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 1157 return; 1158 } 1159 1160 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 1161 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 1162 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 1163 return; 1164 } 1165 1166 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 1167 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 1168 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 1169 return; 1170 } 1171 } 1172 1173 switch (hci_stack.state){ 1174 case HCI_STATE_INITIALIZING: 1175 // log_info("hci_init: substate %u\n", hci_stack.substate); 1176 if (hci_stack.substate % 2) { 1177 // odd: waiting for command completion 1178 return; 1179 } 1180 switch (hci_stack.substate >> 1){ 1181 case 0: // RESET 1182 hci_send_cmd(&hci_reset); 1183 if (hci_stack.config == 0 || ((hci_uart_config_t *)hci_stack.config)->baudrate_main == 0){ 1184 // skip baud change 1185 hci_stack.substate = 4; // >> 1 = 2 1186 } 1187 break; 1188 case 1: // SEND BAUD CHANGE 1189 hci_stack.control->baudrate_cmd(hci_stack.config, ((hci_uart_config_t *)hci_stack.config)->baudrate_main, hci_stack.hci_packet_buffer); 1190 hci_send_cmd_packet(hci_stack.hci_packet_buffer, 3 + hci_stack.hci_packet_buffer[2]); 1191 break; 1192 case 2: // LOCAL BAUD CHANGE 1193 hci_stack.hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack.config)->baudrate_main); 1194 hci_stack.substate += 2; 1195 // break missing here for fall through 1196 1197 case 3: 1198 // custom initialization 1199 if (hci_stack.control && hci_stack.control->next_cmd){ 1200 int valid_cmd = (*hci_stack.control->next_cmd)(hci_stack.config, hci_stack.hci_packet_buffer); 1201 if (valid_cmd){ 1202 int size = 3 + hci_stack.hci_packet_buffer[2]; 1203 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack.hci_packet_buffer, size); 1204 hci_stack.substate = 4; // more init commands 1205 break; 1206 } 1207 log_info("hci_run: init script done\n\r"); 1208 } 1209 // otherwise continue 1210 hci_send_cmd(&hci_read_bd_addr); 1211 break; 1212 case 4: 1213 hci_send_cmd(&hci_read_buffer_size); 1214 break; 1215 case 5: 1216 hci_send_cmd(&hci_read_local_supported_features); 1217 break; 1218 case 6: 1219 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0xFFFFFFFF); ///0x1DFFFFFF 1220 1221 // skip Classic init commands for LE only chipsets 1222 if (hci_classic_supported()){ 1223 if (!hci_ssp_supported()){ 1224 hci_stack.substate = 7 << 1; // skip hci_write_simple_pairing_mode 1225 } 1226 } else { 1227 hci_stack.substate = 11 << 1; // skip all classic command 1228 } 1229 break; 1230 case 7: 1231 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack.ssp_enable); 1232 break; 1233 case 8: 1234 // ca. 15 sec 1235 hci_send_cmd(&hci_write_page_timeout, 0x6000); 1236 break; 1237 case 9: 1238 hci_send_cmd(&hci_write_class_of_device, hci_stack.class_of_device); 1239 break; 1240 case 10: 1241 if (hci_stack.local_name){ 1242 hci_send_cmd(&hci_write_local_name, hci_stack.local_name); 1243 } else { 1244 char hostname[30]; 1245 #ifdef EMBEDDED 1246 // BTstack-11:22:33:44:55:66 1247 strcpy(hostname, "BTstack "); 1248 strcat(hostname, bd_addr_to_str(hci_stack.local_bd_addr)); 1249 printf("---> Name %s\n", hostname); 1250 #else 1251 // hostname for POSIX systems 1252 gethostname(hostname, 30); 1253 hostname[29] = '\0'; 1254 #endif 1255 hci_send_cmd(&hci_write_local_name, hostname); 1256 } 1257 break; 1258 case 11: 1259 hci_send_cmd(&hci_write_scan_enable, (hci_stack.connectable << 1) | hci_stack.discoverable); // page scan 1260 break; 1261 case 12: 1262 // done. 1263 hci_stack.state = HCI_STATE_WORKING; 1264 hci_emit_state(); 1265 break; 1266 default: 1267 break; 1268 } 1269 hci_stack.substate++; 1270 break; 1271 1272 case HCI_STATE_HALTING: 1273 1274 log_info("HCI_STATE_HALTING\n"); 1275 // close all open connections 1276 connection = (hci_connection_t *) hci_stack.connections; 1277 if (connection){ 1278 1279 // send disconnect 1280 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1281 1282 log_info("HCI_STATE_HALTING, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1283 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1284 1285 // send disconnected event right away - causes higher layer connections to get closed, too. 1286 hci_shutdown_connection(connection); 1287 return; 1288 } 1289 log_info("HCI_STATE_HALTING, calling off\n"); 1290 1291 // switch mode 1292 hci_power_control_off(); 1293 1294 log_info("HCI_STATE_HALTING, emitting state\n"); 1295 hci_emit_state(); 1296 log_info("HCI_STATE_HALTING, done\n"); 1297 break; 1298 1299 case HCI_STATE_FALLING_ASLEEP: 1300 switch(hci_stack.substate) { 1301 case 0: 1302 log_info("HCI_STATE_FALLING_ASLEEP\n"); 1303 // close all open connections 1304 connection = (hci_connection_t *) hci_stack.connections; 1305 1306 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1307 // don't close connections, if H4 supports power management 1308 if (bt_control_iphone_power_management_enabled()){ 1309 connection = NULL; 1310 } 1311 #endif 1312 if (connection){ 1313 1314 // send disconnect 1315 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1316 1317 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1318 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1319 1320 // send disconnected event right away - causes higher layer connections to get closed, too. 1321 hci_shutdown_connection(connection); 1322 return; 1323 } 1324 1325 // disable page and inquiry scan 1326 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1327 1328 log_info("HCI_STATE_HALTING, disabling inq cans\n"); 1329 hci_send_cmd(&hci_write_scan_enable, hci_stack.connectable << 1); // drop inquiry scan but keep page scan 1330 1331 // continue in next sub state 1332 hci_stack.substate++; 1333 break; 1334 case 1: 1335 // wait for command complete "hci_write_scan_enable" in event_handler(); 1336 break; 1337 case 2: 1338 log_info("HCI_STATE_HALTING, calling sleep\n"); 1339 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1340 // don't actually go to sleep, if H4 supports power management 1341 if (bt_control_iphone_power_management_enabled()){ 1342 // SLEEP MODE reached 1343 hci_stack.state = HCI_STATE_SLEEPING; 1344 hci_emit_state(); 1345 break; 1346 } 1347 #endif 1348 // switch mode 1349 hci_power_control_sleep(); // changes hci_stack.state to SLEEP 1350 hci_emit_state(); 1351 break; 1352 1353 default: 1354 break; 1355 } 1356 break; 1357 1358 default: 1359 break; 1360 } 1361 } 1362 1363 int hci_send_cmd_packet(uint8_t *packet, int size){ 1364 bd_addr_t addr; 1365 hci_connection_t * conn; 1366 // house-keeping 1367 1368 // create_connection? 1369 if (IS_COMMAND(packet, hci_create_connection)){ 1370 bt_flip_addr(addr, &packet[3]); 1371 log_info("Create_connection to %s\n", bd_addr_to_str(addr)); 1372 conn = connection_for_address(addr); 1373 if (conn) { 1374 // if connection exists 1375 if (conn->state == OPEN) { 1376 // and OPEN, emit connection complete command 1377 hci_emit_connection_complete(conn, 0); 1378 } 1379 // otherwise, just ignore as it is already in the open process 1380 return 0; // don't sent packet to controller 1381 1382 } 1383 // create connection struct and register, state = SENT_CREATE_CONNECTION 1384 conn = create_connection_for_addr(addr); 1385 if (!conn){ 1386 // notify client that alloc failed 1387 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 1388 return 0; // don't sent packet to controller 1389 } 1390 conn->state = SENT_CREATE_CONNECTION; 1391 } 1392 1393 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1394 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1395 } 1396 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1397 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1398 } 1399 if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 1400 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 1401 } 1402 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 1403 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 1404 } 1405 1406 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1407 if (hci_stack.remote_device_db){ 1408 bt_flip_addr(addr, &packet[3]); 1409 hci_stack.remote_device_db->delete_link_key(&addr); 1410 } 1411 } 1412 1413 hci_stack.num_cmd_packets--; 1414 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1415 } 1416 1417 // Configure Secure Simple Pairing 1418 1419 // enable will enable SSP during init 1420 void hci_ssp_set_enable(int enable){ 1421 hci_stack.ssp_enable = enable; 1422 } 1423 1424 // if set, BTstack will respond to io capability request using authentication requirement 1425 void hci_ssp_set_io_capability(int io_capability){ 1426 hci_stack.ssp_io_capability = io_capability; 1427 } 1428 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 1429 hci_stack.ssp_authentication_requirement = authentication_requirement; 1430 } 1431 1432 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 1433 void hci_ssp_set_auto_accept(int auto_accept){ 1434 hci_stack.ssp_auto_accept = auto_accept; 1435 } 1436 1437 /** 1438 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1439 */ 1440 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1441 va_list argptr; 1442 va_start(argptr, cmd); 1443 uint16_t size = hci_create_cmd_internal(hci_stack.hci_packet_buffer, cmd, argptr); 1444 va_end(argptr); 1445 return hci_send_cmd_packet(hci_stack.hci_packet_buffer, size); 1446 } 1447 1448 // Create various non-HCI events. 1449 // TODO: generalize, use table similar to hci_create_command 1450 1451 void hci_emit_state(){ 1452 log_info("BTSTACK_EVENT_STATE %u", hci_stack.state); 1453 uint8_t event[3]; 1454 event[0] = BTSTACK_EVENT_STATE; 1455 event[1] = sizeof(event) - 2; 1456 event[2] = hci_stack.state; 1457 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1458 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1459 } 1460 1461 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 1462 uint8_t event[13]; 1463 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1464 event[1] = sizeof(event) - 2; 1465 event[2] = status; 1466 bt_store_16(event, 3, conn->con_handle); 1467 bt_flip_addr(&event[5], conn->address); 1468 event[11] = 1; // ACL connection 1469 event[12] = 0; // encryption disabled 1470 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1471 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1472 } 1473 1474 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 1475 uint8_t event[6]; 1476 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1477 event[1] = sizeof(event) - 2; 1478 event[2] = 0; // status = OK 1479 bt_store_16(event, 3, handle); 1480 event[5] = reason; 1481 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1482 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1483 } 1484 1485 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1486 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 1487 uint8_t event[4]; 1488 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 1489 event[1] = sizeof(event) - 2; 1490 bt_store_16(event, 2, conn->con_handle); 1491 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1492 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1493 } 1494 1495 void hci_emit_nr_connections_changed(){ 1496 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 1497 uint8_t event[3]; 1498 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 1499 event[1] = sizeof(event) - 2; 1500 event[2] = nr_hci_connections(); 1501 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1502 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1503 } 1504 1505 void hci_emit_hci_open_failed(){ 1506 log_info("BTSTACK_EVENT_POWERON_FAILED"); 1507 uint8_t event[2]; 1508 event[0] = BTSTACK_EVENT_POWERON_FAILED; 1509 event[1] = sizeof(event) - 2; 1510 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1511 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1512 } 1513 1514 #ifndef EMBEDDED 1515 void hci_emit_btstack_version() { 1516 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 1517 uint8_t event[6]; 1518 event[0] = BTSTACK_EVENT_VERSION; 1519 event[1] = sizeof(event) - 2; 1520 event[2] = BTSTACK_MAJOR; 1521 event[3] = BTSTACK_MINOR; 1522 bt_store_16(event, 4, BTSTACK_REVISION); 1523 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1524 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1525 } 1526 #endif 1527 1528 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 1529 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 1530 uint8_t event[3]; 1531 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 1532 event[1] = sizeof(event) - 2; 1533 event[2] = enabled; 1534 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1535 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1536 } 1537 1538 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 1539 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 1540 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 1541 event[1] = sizeof(event) - 2 - 1; 1542 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 1543 bt_flip_addr(&event[3], *addr); 1544 memcpy(&event[9], name, 248); 1545 1546 event[9+248] = 0; // assert \0 for log_info 1547 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(*addr), &event[9]); 1548 1549 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 1550 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 1551 } 1552 1553 void hci_emit_discoverable_enabled(uint8_t enabled){ 1554 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 1555 uint8_t event[3]; 1556 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 1557 event[1] = sizeof(event) - 2; 1558 event[2] = enabled; 1559 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1560 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1561 } 1562