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