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 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_NOTIFICATION); 650 if (!hci_stack.remote_device_db) break; 651 bt_flip_addr(addr, &packet[2]); 652 hci_stack.remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8]); 653 // still forward event to allow dismiss of pairing dialog 654 break; 655 656 case HCI_EVENT_PIN_CODE_REQUEST: 657 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_PIN_CODE_REQUEST); 658 // non-bondable mode: pin code negative reply will be sent 659 if (!hci_stack.bondable){ 660 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_PIN_CODE_REQUEST); 661 hci_run(); 662 return; 663 } 664 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 665 if (!hci_stack.remote_device_db) break; 666 bt_flip_addr(addr, &packet[2]); 667 hci_stack.remote_device_db->delete_link_key(&addr); 668 break; 669 670 case HCI_EVENT_IO_CAPABILITY_REQUEST: 671 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 672 if (!hci_stack.bondable || hci_stack.ssp_io_capability == SSP_IO_CAPABILITY_UNKNOWN) break; 673 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 674 break; 675 676 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 677 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_USER_CONFIRM_REQUEST); 678 if (!hci_stack.ssp_auto_accept) break; 679 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 680 break; 681 682 case HCI_EVENT_USER_PASSKEY_REQUEST: 683 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_USER_PASSKEY_REQUEST); 684 if (!hci_stack.ssp_auto_accept) break; 685 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 686 break; 687 688 #ifndef EMBEDDED 689 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 690 if (!hci_stack.remote_device_db) break; 691 if (packet[2]) break; // status not ok 692 bt_flip_addr(addr, &packet[3]); 693 // fix for invalid remote names - terminate on 0xff 694 for (i=0; i<248;i++){ 695 if (packet[9+i] == 0xff){ 696 packet[9+i] = 0; 697 break; 698 } 699 } 700 memset(&device_name, 0, sizeof(device_name_t)); 701 strncpy((char*) device_name, (char*) &packet[9], 248); 702 hci_stack.remote_device_db->put_name(&addr, &device_name); 703 break; 704 705 case HCI_EVENT_INQUIRY_RESULT: 706 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 707 if (!hci_stack.remote_device_db) break; 708 // first send inq result packet 709 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 710 // then send cached remote names 711 for (i=0; i<packet[2];i++){ 712 bt_flip_addr(addr, &packet[3+i*6]); 713 if (hci_stack.remote_device_db->get_name(&addr, &device_name)){ 714 hci_emit_remote_name_cached(&addr, &device_name); 715 } 716 } 717 return; 718 #endif 719 720 case HCI_EVENT_DISCONNECTION_COMPLETE: 721 if (!packet[2]){ 722 handle = READ_BT_16(packet, 3); 723 hci_connection_t * conn = hci_connection_for_handle(handle); 724 if (conn) { 725 hci_shutdown_connection(conn); 726 } 727 } 728 break; 729 730 case HCI_EVENT_HARDWARE_ERROR: 731 if(hci_stack.control && hci_stack.control->hw_error){ 732 (*hci_stack.control->hw_error)(); 733 } 734 break; 735 736 #ifdef HAVE_BLE 737 case HCI_EVENT_LE_META: 738 switch (packet[2]) { 739 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 740 // Connection management 741 bt_flip_addr(addr, &packet[8]); 742 log_info("LE Connection_complete (status=%u) %s\n", packet[3], bd_addr_to_str(addr)); 743 // LE connections are auto-accepted, so just create a connection if there isn't one already 744 conn = connection_for_address(addr); 745 if (packet[3]){ 746 if (conn){ 747 // outgoing connection failed, remove entry 748 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 749 btstack_memory_hci_connection_free( conn ); 750 751 } 752 // if authentication error, also delete link key 753 if (packet[3] == 0x05) { 754 hci_drop_link_key_for_bd_addr(&addr); 755 } 756 break; 757 } 758 if (!conn){ 759 conn = create_connection_for_addr(addr); 760 } 761 if (!conn){ 762 // no memory 763 break; 764 } 765 766 conn->state = OPEN; 767 conn->con_handle = READ_BT_16(packet, 4); 768 769 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 770 771 // restart timer 772 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 773 // run_loop_add_timer(&conn->timeout); 774 775 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 776 777 hci_emit_nr_connections_changed(); 778 break; 779 780 // printf("LE buffer size: %u, count %u\n", READ_BT_16(packet,6), packet[8]); 781 782 default: 783 break; 784 } 785 break; 786 #endif 787 788 default: 789 break; 790 } 791 792 // handle BT initialization 793 if (hci_stack.state == HCI_STATE_INITIALIZING){ 794 if (hci_stack.substate % 2){ 795 // odd: waiting for event 796 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE || packet[0] == HCI_EVENT_COMMAND_STATUS){ 797 // wait for explicit COMMAND COMPLETE on RESET 798 if (hci_stack.substate > 1 || COMMAND_COMPLETE_EVENT(packet, hci_reset)) { 799 hci_stack.substate++; 800 } 801 } 802 } 803 } 804 805 // help with BT sleep 806 if (hci_stack.state == HCI_STATE_FALLING_ASLEEP 807 && hci_stack.substate == 1 808 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 809 hci_stack.substate++; 810 } 811 812 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 813 814 // execute main loop 815 hci_run(); 816 } 817 818 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 819 switch (packet_type) { 820 case HCI_EVENT_PACKET: 821 event_handler(packet, size); 822 break; 823 case HCI_ACL_DATA_PACKET: 824 acl_handler(packet, size); 825 break; 826 default: 827 break; 828 } 829 } 830 831 /** Register HCI packet handlers */ 832 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 833 hci_stack.packet_handler = handler; 834 } 835 836 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 837 838 // reference to use transport layer implementation 839 hci_stack.hci_transport = transport; 840 841 // references to used control implementation 842 hci_stack.control = control; 843 844 // reference to used config 845 hci_stack.config = config; 846 847 // no connections yet 848 hci_stack.connections = NULL; 849 hci_stack.discoverable = 0; 850 hci_stack.connectable = 0; 851 hci_stack.bondable = 1; 852 853 // no pending cmds 854 hci_stack.decline_reason = 0; 855 hci_stack.new_scan_enable_value = 0xff; 856 857 // higher level handler 858 hci_stack.packet_handler = dummy_handler; 859 860 // store and open remote device db 861 hci_stack.remote_device_db = remote_device_db; 862 if (hci_stack.remote_device_db) { 863 hci_stack.remote_device_db->open(); 864 } 865 866 // max acl payload size defined in config.h 867 hci_stack.acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 868 869 // register packet handlers with transport 870 transport->register_packet_handler(&packet_handler); 871 872 hci_stack.state = HCI_STATE_OFF; 873 874 // class of device 875 hci_stack.class_of_device = 0x007a020c; // Smartphone 876 877 // Secure Simple Pairing default: enable, no I/O capabilities, auto accept 878 hci_stack.ssp_enable = 1; 879 hci_stack.ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 880 hci_stack.ssp_authentication_requirement = 0; 881 hci_stack.ssp_auto_accept = 1; 882 883 // LE 884 hci_stack.adv_addr_type = 0; 885 memset(hci_stack.adv_address, 0, 6); 886 } 887 888 void hci_close(){ 889 // close remote device db 890 if (hci_stack.remote_device_db) { 891 hci_stack.remote_device_db->close(); 892 } 893 while (hci_stack.connections) { 894 hci_shutdown_connection((hci_connection_t *) hci_stack.connections); 895 } 896 hci_power_control(HCI_POWER_OFF); 897 } 898 899 // State-Module-Driver overview 900 // state module low-level 901 // HCI_STATE_OFF off close 902 // HCI_STATE_INITIALIZING, on open 903 // HCI_STATE_WORKING, on open 904 // HCI_STATE_HALTING, on open 905 // HCI_STATE_SLEEPING, off/sleep close 906 // HCI_STATE_FALLING_ASLEEP on open 907 908 static int hci_power_control_on(void){ 909 910 // power on 911 int err = 0; 912 if (hci_stack.control && hci_stack.control->on){ 913 err = (*hci_stack.control->on)(hci_stack.config); 914 } 915 if (err){ 916 log_error( "POWER_ON failed\n"); 917 hci_emit_hci_open_failed(); 918 return err; 919 } 920 921 // open low-level device 922 err = hci_stack.hci_transport->open(hci_stack.config); 923 if (err){ 924 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 925 if (hci_stack.control && hci_stack.control->off){ 926 (*hci_stack.control->off)(hci_stack.config); 927 } 928 hci_emit_hci_open_failed(); 929 return err; 930 } 931 return 0; 932 } 933 934 static void hci_power_control_off(void){ 935 936 log_info("hci_power_control_off\n"); 937 938 // close low-level device 939 hci_stack.hci_transport->close(hci_stack.config); 940 941 log_info("hci_power_control_off - hci_transport closed\n"); 942 943 // power off 944 if (hci_stack.control && hci_stack.control->off){ 945 (*hci_stack.control->off)(hci_stack.config); 946 } 947 948 log_info("hci_power_control_off - control closed\n"); 949 950 hci_stack.state = HCI_STATE_OFF; 951 } 952 953 static void hci_power_control_sleep(void){ 954 955 log_info("hci_power_control_sleep\n"); 956 957 #if 0 958 // don't close serial port during sleep 959 960 // close low-level device 961 hci_stack.hci_transport->close(hci_stack.config); 962 #endif 963 964 // sleep mode 965 if (hci_stack.control && hci_stack.control->sleep){ 966 (*hci_stack.control->sleep)(hci_stack.config); 967 } 968 969 hci_stack.state = HCI_STATE_SLEEPING; 970 } 971 972 static int hci_power_control_wake(void){ 973 974 log_info("hci_power_control_wake\n"); 975 976 // wake on 977 if (hci_stack.control && hci_stack.control->wake){ 978 (*hci_stack.control->wake)(hci_stack.config); 979 } 980 981 #if 0 982 // open low-level device 983 int err = hci_stack.hci_transport->open(hci_stack.config); 984 if (err){ 985 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 986 if (hci_stack.control && hci_stack.control->off){ 987 (*hci_stack.control->off)(hci_stack.config); 988 } 989 hci_emit_hci_open_failed(); 990 return err; 991 } 992 #endif 993 994 return 0; 995 } 996 997 998 int hci_power_control(HCI_POWER_MODE power_mode){ 999 1000 log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack.state); 1001 1002 int err = 0; 1003 switch (hci_stack.state){ 1004 1005 case HCI_STATE_OFF: 1006 switch (power_mode){ 1007 case HCI_POWER_ON: 1008 err = hci_power_control_on(); 1009 if (err) return err; 1010 // set up state machine 1011 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 1012 hci_stack.state = HCI_STATE_INITIALIZING; 1013 hci_stack.substate = 0; 1014 break; 1015 case HCI_POWER_OFF: 1016 // do nothing 1017 break; 1018 case HCI_POWER_SLEEP: 1019 // do nothing (with SLEEP == OFF) 1020 break; 1021 } 1022 break; 1023 1024 case HCI_STATE_INITIALIZING: 1025 switch (power_mode){ 1026 case HCI_POWER_ON: 1027 // do nothing 1028 break; 1029 case HCI_POWER_OFF: 1030 // no connections yet, just turn it off 1031 hci_power_control_off(); 1032 break; 1033 case HCI_POWER_SLEEP: 1034 // no connections yet, just turn it off 1035 hci_power_control_sleep(); 1036 break; 1037 } 1038 break; 1039 1040 case HCI_STATE_WORKING: 1041 switch (power_mode){ 1042 case HCI_POWER_ON: 1043 // do nothing 1044 break; 1045 case HCI_POWER_OFF: 1046 // see hci_run 1047 hci_stack.state = HCI_STATE_HALTING; 1048 break; 1049 case HCI_POWER_SLEEP: 1050 // see hci_run 1051 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 1052 hci_stack.substate = 0; 1053 break; 1054 } 1055 break; 1056 1057 case HCI_STATE_HALTING: 1058 switch (power_mode){ 1059 case HCI_POWER_ON: 1060 // set up state machine 1061 hci_stack.state = HCI_STATE_INITIALIZING; 1062 hci_stack.substate = 0; 1063 break; 1064 case HCI_POWER_OFF: 1065 // do nothing 1066 break; 1067 case HCI_POWER_SLEEP: 1068 // see hci_run 1069 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 1070 hci_stack.substate = 0; 1071 break; 1072 } 1073 break; 1074 1075 case HCI_STATE_FALLING_ASLEEP: 1076 switch (power_mode){ 1077 case HCI_POWER_ON: 1078 1079 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1080 // nothing to do, if H4 supports power management 1081 if (bt_control_iphone_power_management_enabled()){ 1082 hci_stack.state = HCI_STATE_INITIALIZING; 1083 hci_stack.substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1084 break; 1085 } 1086 #endif 1087 // set up state machine 1088 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 1089 hci_stack.state = HCI_STATE_INITIALIZING; 1090 hci_stack.substate = 0; 1091 break; 1092 case HCI_POWER_OFF: 1093 // see hci_run 1094 hci_stack.state = HCI_STATE_HALTING; 1095 break; 1096 case HCI_POWER_SLEEP: 1097 // do nothing 1098 break; 1099 } 1100 break; 1101 1102 case HCI_STATE_SLEEPING: 1103 switch (power_mode){ 1104 case HCI_POWER_ON: 1105 1106 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1107 // nothing to do, if H4 supports power management 1108 if (bt_control_iphone_power_management_enabled()){ 1109 hci_stack.state = HCI_STATE_INITIALIZING; 1110 hci_stack.substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 1111 hci_update_scan_enable(); 1112 break; 1113 } 1114 #endif 1115 err = hci_power_control_wake(); 1116 if (err) return err; 1117 // set up state machine 1118 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 1119 hci_stack.state = HCI_STATE_INITIALIZING; 1120 hci_stack.substate = 0; 1121 break; 1122 case HCI_POWER_OFF: 1123 hci_stack.state = HCI_STATE_HALTING; 1124 break; 1125 case HCI_POWER_SLEEP: 1126 // do nothing 1127 break; 1128 } 1129 break; 1130 } 1131 1132 // create internal event 1133 hci_emit_state(); 1134 1135 // trigger next/first action 1136 hci_run(); 1137 1138 return 0; 1139 } 1140 1141 static void hci_update_scan_enable(void){ 1142 // 2 = page scan, 1 = inq scan 1143 hci_stack.new_scan_enable_value = hci_stack.connectable << 1 | hci_stack.discoverable; 1144 hci_run(); 1145 } 1146 1147 void hci_discoverable_control(uint8_t enable){ 1148 if (enable) enable = 1; // normalize argument 1149 1150 if (hci_stack.discoverable == enable){ 1151 hci_emit_discoverable_enabled(hci_stack.discoverable); 1152 return; 1153 } 1154 1155 hci_stack.discoverable = enable; 1156 hci_update_scan_enable(); 1157 } 1158 1159 void hci_connectable_control(uint8_t enable){ 1160 if (enable) enable = 1; // normalize argument 1161 1162 // don't emit event 1163 if (hci_stack.connectable == enable) return; 1164 1165 hci_stack.connectable = enable; 1166 hci_update_scan_enable(); 1167 } 1168 1169 bd_addr_t * hci_local_bd_addr(void){ 1170 return &hci_stack.local_bd_addr; 1171 } 1172 1173 void hci_run(){ 1174 1175 hci_connection_t * connection; 1176 linked_item_t * it; 1177 1178 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1179 1180 // global/non-connection oriented commands 1181 1182 // decline incoming connections 1183 if (hci_stack.decline_reason){ 1184 uint8_t reason = hci_stack.decline_reason; 1185 hci_stack.decline_reason = 0; 1186 hci_send_cmd(&hci_reject_connection_request, hci_stack.decline_addr, reason); 1187 return; 1188 } 1189 1190 // send scan enable 1191 if (hci_stack.state == HCI_STATE_WORKING && hci_stack.new_scan_enable_value != 0xff && hci_classic_supported()){ 1192 hci_send_cmd(&hci_write_scan_enable, hci_stack.new_scan_enable_value); 1193 hci_stack.new_scan_enable_value = 0xff; 1194 return; 1195 } 1196 1197 // send pending HCI commands 1198 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 1199 1200 connection = (hci_connection_t *) it; 1201 1202 if (connection->state == RECEIVED_CONNECTION_REQUEST){ 1203 log_info("sending hci_accept_connection_request\n"); 1204 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 1205 connection->state = ACCEPTED_CONNECTION_REQUEST; 1206 return; 1207 } 1208 1209 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 1210 link_key_t link_key; 1211 log_info("responding to link key request\n"); 1212 if ( hci_stack.bondable && hci_stack.remote_device_db && hci_stack.remote_device_db->get_link_key( &connection->address, &link_key)){ 1213 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 1214 } else { 1215 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 1216 } 1217 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 1218 return; 1219 } 1220 1221 if (connection->authentication_flags & HANDLE_PIN_CODE_REQUEST){ 1222 log_info("denying to pin request\n"); 1223 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 1224 connectionClearAuthenticationFlags(connection, HANDLE_PIN_CODE_REQUEST); 1225 return; 1226 } 1227 1228 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 1229 if (hci_stack.bondable){ 1230 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack.ssp_io_capability, NULL, hci_stack.ssp_authentication_requirement); 1231 } else { 1232 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 1233 } 1234 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 1235 return; 1236 } 1237 1238 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 1239 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 1240 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 1241 return; 1242 } 1243 1244 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 1245 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 1246 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 1247 return; 1248 } 1249 1250 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 1251 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 1252 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 1253 } 1254 } 1255 1256 switch (hci_stack.state){ 1257 case HCI_STATE_INITIALIZING: 1258 // log_info("hci_init: substate %u\n", hci_stack.substate); 1259 if (hci_stack.substate % 2) { 1260 // odd: waiting for command completion 1261 return; 1262 } 1263 switch (hci_stack.substate >> 1){ 1264 case 0: // RESET 1265 hci_send_cmd(&hci_reset); 1266 1267 if (hci_stack.config == 0 || ((hci_uart_config_t *)hci_stack.config)->baudrate_main == 0){ 1268 // skip baud change 1269 hci_stack.substate = 4; // >> 1 = 2 1270 } 1271 break; 1272 case 1: // SEND BAUD CHANGE 1273 hci_stack.control->baudrate_cmd(hci_stack.config, ((hci_uart_config_t *)hci_stack.config)->baudrate_main, hci_stack.hci_packet_buffer); 1274 hci_send_cmd_packet(hci_stack.hci_packet_buffer, 3 + hci_stack.hci_packet_buffer[2]); 1275 break; 1276 case 2: // LOCAL BAUD CHANGE 1277 hci_stack.hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack.config)->baudrate_main); 1278 hci_stack.substate += 2; 1279 // break missing here for fall through 1280 1281 case 3: 1282 // Custom initialization 1283 if (hci_stack.control && hci_stack.control->next_cmd){ 1284 int valid_cmd = (*hci_stack.control->next_cmd)(hci_stack.config, hci_stack.hci_packet_buffer); 1285 if (valid_cmd){ 1286 int size = 3 + hci_stack.hci_packet_buffer[2]; 1287 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack.hci_packet_buffer, size); 1288 hci_stack.substate = 4; // more init commands 1289 break; 1290 } 1291 log_info("hci_run: init script done\n\r"); 1292 } 1293 // otherwise continue 1294 hci_send_cmd(&hci_read_bd_addr); 1295 break; 1296 case 4: 1297 hci_send_cmd(&hci_read_buffer_size); 1298 break; 1299 case 5: 1300 hci_send_cmd(&hci_read_local_supported_features); 1301 break; 1302 case 6: 1303 if (hci_le_supported()){ 1304 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1305 } else { 1306 // Kensington Bluetoot 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1307 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1308 } 1309 1310 // skip Classic init commands for LE only chipsets 1311 if (!hci_classic_supported()){ 1312 if (hci_le_supported()){ 1313 hci_stack.substate = 11 << 1; // skip all classic command 1314 } else { 1315 log_error("Neither BR/EDR nor LE supported"); 1316 hci_stack.substate = 13 << 1; // skip all 1317 } 1318 } 1319 break; 1320 case 7: 1321 if (hci_ssp_supported()){ 1322 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack.ssp_enable); 1323 break; 1324 } 1325 hci_stack.substate += 2; 1326 // break missing here for fall through 1327 1328 case 8: 1329 // ca. 15 sec 1330 hci_send_cmd(&hci_write_page_timeout, 0x6000); 1331 break; 1332 case 9: 1333 hci_send_cmd(&hci_write_class_of_device, hci_stack.class_of_device); 1334 break; 1335 case 10: 1336 if (hci_stack.local_name){ 1337 hci_send_cmd(&hci_write_local_name, hci_stack.local_name); 1338 } else { 1339 char hostname[30]; 1340 #ifdef EMBEDDED 1341 // BTstack-11:22:33:44:55:66 1342 strcpy(hostname, "BTstack "); 1343 strcat(hostname, bd_addr_to_str(hci_stack.local_bd_addr)); 1344 printf("---> Name %s\n", hostname); 1345 #else 1346 // hostname for POSIX systems 1347 gethostname(hostname, 30); 1348 hostname[29] = '\0'; 1349 #endif 1350 hci_send_cmd(&hci_write_local_name, hostname); 1351 } 1352 break; 1353 case 11: 1354 hci_send_cmd(&hci_write_scan_enable, (hci_stack.connectable << 1) | hci_stack.discoverable); // page scan 1355 if (!hci_le_supported()){ 1356 // SKIP LE init for Classic only configuration 1357 hci_stack.substate = 13 << 1; 1358 } 1359 break; 1360 1361 #ifdef HAVE_BLE 1362 // LE INIT 1363 case 12: 1364 hci_send_cmd(&hci_le_read_buffer_size); 1365 break; 1366 case 13: 1367 // LE Supported Host = 1, Simultaneous Host = 0 1368 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1369 break; 1370 #endif 1371 1372 // DONE 1373 case 14: 1374 // done. 1375 hci_stack.state = HCI_STATE_WORKING; 1376 hci_emit_state(); 1377 break; 1378 default: 1379 break; 1380 } 1381 hci_stack.substate++; 1382 break; 1383 1384 case HCI_STATE_HALTING: 1385 1386 log_info("HCI_STATE_HALTING\n"); 1387 // close all open connections 1388 connection = (hci_connection_t *) hci_stack.connections; 1389 if (connection){ 1390 1391 // send disconnect 1392 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1393 1394 log_info("HCI_STATE_HALTING, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1395 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1396 1397 // send disconnected event right away - causes higher layer connections to get closed, too. 1398 hci_shutdown_connection(connection); 1399 return; 1400 } 1401 log_info("HCI_STATE_HALTING, calling off\n"); 1402 1403 // switch mode 1404 hci_power_control_off(); 1405 1406 log_info("HCI_STATE_HALTING, emitting state\n"); 1407 hci_emit_state(); 1408 log_info("HCI_STATE_HALTING, done\n"); 1409 break; 1410 1411 case HCI_STATE_FALLING_ASLEEP: 1412 switch(hci_stack.substate) { 1413 case 0: 1414 log_info("HCI_STATE_FALLING_ASLEEP\n"); 1415 // close all open connections 1416 connection = (hci_connection_t *) hci_stack.connections; 1417 1418 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1419 // don't close connections, if H4 supports power management 1420 if (bt_control_iphone_power_management_enabled()){ 1421 connection = NULL; 1422 } 1423 #endif 1424 if (connection){ 1425 1426 // send disconnect 1427 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1428 1429 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1430 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1431 1432 // send disconnected event right away - causes higher layer connections to get closed, too. 1433 hci_shutdown_connection(connection); 1434 return; 1435 } 1436 1437 if (hci_classic_supported()){ 1438 // disable page and inquiry scan 1439 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1440 1441 log_info("HCI_STATE_HALTING, disabling inq scans\n"); 1442 hci_send_cmd(&hci_write_scan_enable, hci_stack.connectable << 1); // drop inquiry scan but keep page scan 1443 1444 // continue in next sub state 1445 hci_stack.substate++; 1446 break; 1447 } 1448 // fall through for ble-only chips 1449 1450 case 2: 1451 log_info("HCI_STATE_HALTING, calling sleep\n"); 1452 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1453 // don't actually go to sleep, if H4 supports power management 1454 if (bt_control_iphone_power_management_enabled()){ 1455 // SLEEP MODE reached 1456 hci_stack.state = HCI_STATE_SLEEPING; 1457 hci_emit_state(); 1458 break; 1459 } 1460 #endif 1461 // switch mode 1462 hci_power_control_sleep(); // changes hci_stack.state to SLEEP 1463 hci_emit_state(); 1464 break; 1465 1466 default: 1467 break; 1468 } 1469 break; 1470 1471 default: 1472 break; 1473 } 1474 } 1475 1476 int hci_send_cmd_packet(uint8_t *packet, int size){ 1477 bd_addr_t addr; 1478 hci_connection_t * conn; 1479 // house-keeping 1480 1481 // create_connection? 1482 if (IS_COMMAND(packet, hci_create_connection)){ 1483 bt_flip_addr(addr, &packet[3]); 1484 log_info("Create_connection to %s\n", bd_addr_to_str(addr)); 1485 conn = connection_for_address(addr); 1486 if (conn) { 1487 // if connection exists 1488 if (conn->state == OPEN) { 1489 // and OPEN, emit connection complete command 1490 hci_emit_connection_complete(conn, 0); 1491 } 1492 // otherwise, just ignore as it is already in the open process 1493 return 0; // don't sent packet to controller 1494 1495 } 1496 // create connection struct and register, state = SENT_CREATE_CONNECTION 1497 conn = create_connection_for_addr(addr); 1498 if (!conn){ 1499 // notify client that alloc failed 1500 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 1501 return 0; // don't sent packet to controller 1502 } 1503 conn->state = SENT_CREATE_CONNECTION; 1504 } 1505 1506 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1507 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1508 } 1509 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1510 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1511 } 1512 if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 1513 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 1514 } 1515 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 1516 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 1517 } 1518 1519 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1520 if (hci_stack.remote_device_db){ 1521 bt_flip_addr(addr, &packet[3]); 1522 hci_stack.remote_device_db->delete_link_key(&addr); 1523 } 1524 } 1525 1526 #ifdef HAVE_BLE 1527 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 1528 hci_stack.adv_addr_type = packet[8]; 1529 } 1530 if (IS_COMMAND(packet, hci_le_set_random_address)){ 1531 bt_flip_addr(hci_stack.adv_address, &packet[3]); 1532 } 1533 #endif 1534 1535 1536 hci_stack.num_cmd_packets--; 1537 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1538 } 1539 1540 // Configure Secure Simple Pairing 1541 1542 // enable will enable SSP during init 1543 void hci_ssp_set_enable(int enable){ 1544 hci_stack.ssp_enable = enable; 1545 } 1546 1547 // if set, BTstack will respond to io capability request using authentication requirement 1548 void hci_ssp_set_io_capability(int io_capability){ 1549 hci_stack.ssp_io_capability = io_capability; 1550 } 1551 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 1552 hci_stack.ssp_authentication_requirement = authentication_requirement; 1553 } 1554 1555 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 1556 void hci_ssp_set_auto_accept(int auto_accept){ 1557 hci_stack.ssp_auto_accept = auto_accept; 1558 } 1559 1560 /** 1561 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1562 */ 1563 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1564 va_list argptr; 1565 va_start(argptr, cmd); 1566 uint16_t size = hci_create_cmd_internal(hci_stack.hci_packet_buffer, cmd, argptr); 1567 va_end(argptr); 1568 return hci_send_cmd_packet(hci_stack.hci_packet_buffer, size); 1569 } 1570 1571 // Create various non-HCI events. 1572 // TODO: generalize, use table similar to hci_create_command 1573 1574 void hci_emit_state(){ 1575 log_info("BTSTACK_EVENT_STATE %u", hci_stack.state); 1576 uint8_t event[3]; 1577 event[0] = BTSTACK_EVENT_STATE; 1578 event[1] = sizeof(event) - 2; 1579 event[2] = hci_stack.state; 1580 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1581 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1582 } 1583 1584 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 1585 uint8_t event[13]; 1586 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1587 event[1] = sizeof(event) - 2; 1588 event[2] = status; 1589 bt_store_16(event, 3, conn->con_handle); 1590 bt_flip_addr(&event[5], conn->address); 1591 event[11] = 1; // ACL connection 1592 event[12] = 0; // encryption disabled 1593 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1594 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1595 } 1596 1597 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 1598 uint8_t event[6]; 1599 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1600 event[1] = sizeof(event) - 2; 1601 event[2] = 0; // status = OK 1602 bt_store_16(event, 3, handle); 1603 event[5] = reason; 1604 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1605 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1606 } 1607 1608 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1609 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 1610 uint8_t event[4]; 1611 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 1612 event[1] = sizeof(event) - 2; 1613 bt_store_16(event, 2, conn->con_handle); 1614 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1615 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1616 } 1617 1618 void hci_emit_nr_connections_changed(){ 1619 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 1620 uint8_t event[3]; 1621 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 1622 event[1] = sizeof(event) - 2; 1623 event[2] = nr_hci_connections(); 1624 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1625 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1626 } 1627 1628 void hci_emit_hci_open_failed(){ 1629 log_info("BTSTACK_EVENT_POWERON_FAILED"); 1630 uint8_t event[2]; 1631 event[0] = BTSTACK_EVENT_POWERON_FAILED; 1632 event[1] = sizeof(event) - 2; 1633 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1634 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1635 } 1636 1637 #ifndef EMBEDDED 1638 void hci_emit_btstack_version() { 1639 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 1640 uint8_t event[6]; 1641 event[0] = BTSTACK_EVENT_VERSION; 1642 event[1] = sizeof(event) - 2; 1643 event[2] = BTSTACK_MAJOR; 1644 event[3] = BTSTACK_MINOR; 1645 bt_store_16(event, 4, BTSTACK_REVISION); 1646 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1647 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1648 } 1649 #endif 1650 1651 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 1652 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 1653 uint8_t event[3]; 1654 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 1655 event[1] = sizeof(event) - 2; 1656 event[2] = enabled; 1657 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1658 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1659 } 1660 1661 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 1662 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 1663 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 1664 event[1] = sizeof(event) - 2 - 1; 1665 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 1666 bt_flip_addr(&event[3], *addr); 1667 memcpy(&event[9], name, 248); 1668 1669 event[9+248] = 0; // assert \0 for log_info 1670 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(*addr), &event[9]); 1671 1672 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 1673 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 1674 } 1675 1676 void hci_emit_discoverable_enabled(uint8_t enabled){ 1677 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 1678 uint8_t event[3]; 1679 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 1680 event[1] = sizeof(event) - 2; 1681 event[2] = enabled; 1682 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1683 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1684 } 1685 1686 // GAP API 1687 /** 1688 * @bbrief enable/disable bonding. default is enabled 1689 * @praram enabled 1690 */ 1691 void gap_set_bondable_mode(int enable){ 1692 hci_stack.bondable = enable ? 1 : 0; 1693 } 1694 1695 /** 1696 * @brief get current security level 1697 */ 1698 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 1699 return LEVEL_0; 1700 } 1701 1702 /** 1703 * @brief request connection to device to 1704 * @result GAP_AUTHENTICATION_RESULT 1705 */ 1706 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 1707 } 1708