1 /* 2 * Copyright (C) 2009-2012 by Matthias Ringwald 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY MATTHIAS RINGWALD AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at [email protected] 34 * 35 */ 36 37 /* 38 * hci.c 39 * 40 * Created by Matthias Ringwald on 4/29/09. 41 * 42 */ 43 44 #include "config.h" 45 46 #include "hci.h" 47 48 #include <stdarg.h> 49 #include <string.h> 50 #include <stdio.h> 51 52 #ifndef EMBEDDED 53 #include <unistd.h> // gethostbyname 54 #include <btstack/version.h> 55 #endif 56 57 #include "btstack_memory.h" 58 #include "debug.h" 59 #include "hci_dump.h" 60 61 #include <btstack/hci_cmds.h> 62 63 #define HCI_CONNECTION_TIMEOUT_MS 10000 64 65 #define HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP 11 66 67 #ifdef USE_BLUETOOL 68 #include "bt_control_iphone.h" 69 #endif 70 71 static void hci_update_scan_enable(void); 72 73 // the STACK is here 74 static hci_stack_t hci_stack; 75 76 /** 77 * get connection for a given handle 78 * 79 * @return connection OR NULL, if not found 80 */ 81 hci_connection_t * connection_for_handle(hci_con_handle_t con_handle){ 82 linked_item_t *it; 83 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 84 if ( ((hci_connection_t *) it)->con_handle == con_handle){ 85 return (hci_connection_t *) it; 86 } 87 } 88 return NULL; 89 } 90 91 static void hci_connection_timeout_handler(timer_source_t *timer){ 92 hci_connection_t * connection = (hci_connection_t *) linked_item_get_user(&timer->item); 93 #ifdef HAVE_TIME 94 struct timeval tv; 95 gettimeofday(&tv, NULL); 96 if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) { 97 // connections might be timed out 98 hci_emit_l2cap_check_timeout(connection); 99 } 100 #endif 101 #ifdef HAVE_TICK 102 if (embedded_get_ticks() > connection->timestamp + embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 103 // connections might be timed out 104 hci_emit_l2cap_check_timeout(connection); 105 } 106 #endif 107 run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS); 108 run_loop_add_timer(timer); 109 } 110 111 static void hci_connection_timestamp(hci_connection_t *connection){ 112 #ifdef HAVE_TIME 113 gettimeofday(&connection->timestamp, NULL); 114 #endif 115 #ifdef HAVE_TICK 116 connection->timestamp = embedded_get_ticks(); 117 #endif 118 } 119 120 /** 121 * create connection for given address 122 * 123 * @return connection OR NULL, if no memory left 124 */ 125 static hci_connection_t * create_connection_for_addr(bd_addr_t addr){ 126 hci_connection_t * conn = (hci_connection_t *) btstack_memory_hci_connection_get(); 127 if (!conn) return NULL; 128 BD_ADDR_COPY(conn->address, addr); 129 conn->con_handle = 0xffff; 130 conn->authentication_flags = AUTH_FLAGS_NONE; 131 linked_item_set_user(&conn->timeout.item, conn); 132 conn->timeout.process = hci_connection_timeout_handler; 133 hci_connection_timestamp(conn); 134 conn->acl_recombination_length = 0; 135 conn->acl_recombination_pos = 0; 136 conn->num_acl_packets_sent = 0; 137 linked_list_add(&hci_stack.connections, (linked_item_t *) conn); 138 return conn; 139 } 140 141 /** 142 * get connection for given address 143 * 144 * @return connection OR NULL, if not found 145 */ 146 static hci_connection_t * connection_for_address(bd_addr_t address){ 147 linked_item_t *it; 148 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 149 if ( ! BD_ADDR_CMP( ((hci_connection_t *) it)->address, address) ){ 150 return (hci_connection_t *) it; 151 } 152 } 153 return NULL; 154 } 155 156 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 157 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 158 } 159 160 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 161 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 162 } 163 164 165 /** 166 * add authentication flags and reset timer 167 */ 168 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 169 bd_addr_t addr; 170 bt_flip_addr(addr, *(bd_addr_t *) bd_addr); 171 hci_connection_t * conn = connection_for_address(addr); 172 if (conn) { 173 connectionSetAuthenticationFlags(conn, flags); 174 hci_connection_timestamp(conn); 175 } 176 } 177 178 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 179 hci_connection_t * conn = connection_for_handle(handle); 180 if (!conn) return 0; 181 if (!conn->authentication_flags) return 0; 182 if (conn->authentication_flags & SENT_LINK_KEY_REPLY) return 0; 183 if (conn->authentication_flags & RECV_LINK_KEY_NOTIFICATION) return 0; 184 return 1; 185 } 186 187 void hci_drop_link_key_for_bd_addr(bd_addr_t *addr){ 188 if (hci_stack.remote_device_db) { 189 hci_stack.remote_device_db->delete_link_key(addr); 190 } 191 } 192 193 194 /** 195 * count connections 196 */ 197 static int nr_hci_connections(void){ 198 int count = 0; 199 linked_item_t *it; 200 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next, count++); 201 return count; 202 } 203 204 /** 205 * Dummy handler called by HCI 206 */ 207 static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 208 } 209 210 uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){ 211 hci_connection_t * connection = connection_for_handle(handle); 212 if (!connection) { 213 log_error("hci_number_outgoing_packets connectino for handle %u does not exist!\n", handle); 214 return 0; 215 } 216 return connection->num_acl_packets_sent; 217 } 218 219 uint8_t hci_number_free_acl_slots(){ 220 uint8_t free_slots = hci_stack.total_num_acl_packets; 221 linked_item_t *it; 222 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 223 hci_connection_t * connection = (hci_connection_t *) it; 224 if (free_slots < connection->num_acl_packets_sent) { 225 log_error("hci_number_free_acl_slots: sum of outgoing packets > total acl packets!\n"); 226 return 0; 227 } 228 free_slots -= connection->num_acl_packets_sent; 229 } 230 return free_slots; 231 } 232 233 int hci_can_send_packet_now(uint8_t packet_type){ 234 235 // check for async hci transport implementations 236 if (hci_stack.hci_transport->can_send_packet_now){ 237 if (!hci_stack.hci_transport->can_send_packet_now(packet_type)){ 238 return 0; 239 } 240 } 241 242 // check regular Bluetooth flow control 243 switch (packet_type) { 244 case HCI_ACL_DATA_PACKET: 245 return hci_number_free_acl_slots(); 246 case HCI_COMMAND_DATA_PACKET: 247 return hci_stack.num_cmd_packets; 248 default: 249 return 0; 250 } 251 } 252 253 int hci_send_acl_packet(uint8_t *packet, int size){ 254 255 // check for free places on BT module 256 if (!hci_number_free_acl_slots()) return BTSTACK_ACL_BUFFERS_FULL; 257 258 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 259 hci_connection_t *connection = connection_for_handle( con_handle); 260 if (!connection) return 0; 261 hci_connection_timestamp(connection); 262 263 // count packet 264 connection->num_acl_packets_sent++; 265 // log_info("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent); 266 267 // send packet 268 int err = hci_stack.hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 269 270 return err; 271 } 272 273 static void acl_handler(uint8_t *packet, int size){ 274 275 // get info 276 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 277 hci_connection_t *conn = connection_for_handle(con_handle); 278 uint8_t acl_flags = READ_ACL_FLAGS(packet); 279 uint16_t acl_length = READ_ACL_LENGTH(packet); 280 281 // ignore non-registered handle 282 if (!conn){ 283 log_error( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle); 284 return; 285 } 286 287 // update idle timestamp 288 hci_connection_timestamp(conn); 289 290 // handle different packet types 291 switch (acl_flags & 0x03) { 292 293 case 0x01: // continuation fragment 294 295 // sanity check 296 if (conn->acl_recombination_pos == 0) { 297 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle); 298 return; 299 } 300 301 // append fragment payload (header already stored) 302 memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length ); 303 conn->acl_recombination_pos += acl_length; 304 305 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", acl_length, 306 // conn->acl_recombination_pos, conn->acl_recombination_length); 307 308 // forward complete L2CAP packet if complete. 309 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 310 311 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos); 312 // reset recombination buffer 313 conn->acl_recombination_length = 0; 314 conn->acl_recombination_pos = 0; 315 } 316 break; 317 318 case 0x02: { // first fragment 319 320 // sanity check 321 if (conn->acl_recombination_pos) { 322 log_error( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle); 323 return; 324 } 325 326 // peek into L2CAP packet! 327 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 328 329 // log_error( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length); 330 331 // compare fragment size to L2CAP packet size 332 if (acl_length >= l2cap_length + 4){ 333 334 // forward fragment as L2CAP packet 335 hci_stack.packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4); 336 337 } else { 338 // store first fragment and tweak acl length for complete package 339 memcpy(conn->acl_recombination_buffer, packet, acl_length + 4); 340 conn->acl_recombination_pos = acl_length + 4; 341 conn->acl_recombination_length = l2cap_length; 342 bt_store_16(conn->acl_recombination_buffer, 2, l2cap_length +4); 343 } 344 break; 345 346 } 347 default: 348 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03); 349 return; 350 } 351 352 // execute main loop 353 hci_run(); 354 } 355 356 static void hci_shutdown_connection(hci_connection_t *conn){ 357 log_info("Connection closed: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 358 359 // cancel all l2cap connections 360 hci_emit_disconnection_complete(conn->con_handle, 0x16); // terminated by local host 361 362 run_loop_remove_timer(&conn->timeout); 363 364 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 365 btstack_memory_hci_connection_free( conn ); 366 367 // now it's gone 368 hci_emit_nr_connections_changed(); 369 } 370 371 static const uint16_t packet_type_sizes[] = { 372 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 373 HCI_ACL_DH1_SIZE, 0, 0, 0, 374 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 375 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 376 }; 377 378 static uint16_t hci_acl_packet_types_for_buffer_size(uint16_t buffer_size){ 379 uint16_t packet_types = 0; 380 int i; 381 for (i=0;i<16;i++){ 382 if (packet_type_sizes[i] == 0) continue; 383 if (packet_type_sizes[i] <= buffer_size){ 384 packet_types |= 1 << i; 385 } 386 } 387 // flip bits for "may not be used" 388 packet_types ^= 0x3306; 389 return packet_types; 390 } 391 392 uint16_t hci_usable_acl_packet_types(void){ 393 return hci_stack.packet_types; 394 } 395 396 uint8_t* hci_get_outgoing_acl_packet_buffer(void){ 397 // hci packet buffer is >= acl data packet length 398 return hci_stack.hci_packet_buffer; 399 } 400 401 uint16_t hci_max_acl_data_packet_length(){ 402 return hci_stack.acl_data_packet_length; 403 } 404 405 // avoid huge local variables 406 #ifndef EMBEDDED 407 static device_name_t device_name; 408 #endif 409 static void event_handler(uint8_t *packet, int size){ 410 bd_addr_t addr; 411 uint8_t link_type; 412 hci_con_handle_t handle; 413 hci_connection_t * conn; 414 int i; 415 416 // printf("HCI:EVENT:%02x\n", packet[0]); 417 418 switch (packet[0]) { 419 420 case HCI_EVENT_COMMAND_COMPLETE: 421 // get num cmd packets 422 // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack.num_cmd_packets, packet[2]); 423 hci_stack.num_cmd_packets = packet[2]; 424 425 if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){ 426 // from offset 5 427 // status 428 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 429 hci_stack.acl_data_packet_length = READ_BT_16(packet, 6); 430 // ignore: SCO data packet len (8) 431 hci_stack.total_num_acl_packets = packet[9]; 432 // ignore: total num SCO packets 433 if (hci_stack.state == HCI_STATE_INITIALIZING){ 434 // determine usable ACL payload size 435 if (HCI_ACL_PAYLOAD_SIZE < hci_stack.acl_data_packet_length){ 436 hci_stack.acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 437 } 438 // determine usable ACL packet types 439 hci_stack.packet_types = hci_acl_packet_types_for_buffer_size(hci_stack.acl_data_packet_length); 440 441 log_info("hci_read_buffer_size: used size %u, count %u, packet types %04x\n", 442 hci_stack.acl_data_packet_length, hci_stack.total_num_acl_packets, hci_stack.packet_types); 443 } 444 } 445 // Dump local address 446 if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)) { 447 bt_flip_addr(hci_stack.local_bd_addr, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1]); 448 log_info("Local Address, Status: 0x%02x: Addr: %s\n", 449 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack.local_bd_addr)); 450 } 451 if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 452 hci_emit_discoverable_enabled(hci_stack.discoverable); 453 } 454 if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_features)){ 455 memcpy(hci_stack.local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], 8); 456 log_info("Local Supported Features: 0x%02x%02x%02x%02x%02x%02x%02x%02x", 457 hci_stack.local_supported_features[0], hci_stack.local_supported_features[1], 458 hci_stack.local_supported_features[2], hci_stack.local_supported_features[3], 459 hci_stack.local_supported_features[4], hci_stack.local_supported_features[5], 460 hci_stack.local_supported_features[6], hci_stack.local_supported_features[7]); 461 } 462 break; 463 464 case HCI_EVENT_COMMAND_STATUS: 465 // get num cmd packets 466 // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack.num_cmd_packets, packet[3]); 467 hci_stack.num_cmd_packets = packet[3]; 468 break; 469 470 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS: 471 for (i=0; i<packet[2];i++){ 472 handle = READ_BT_16(packet, 3 + 2*i); 473 uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i); 474 conn = connection_for_handle(handle); 475 if (!conn){ 476 log_error("hci_number_completed_packet lists unused con handle %u\n", handle); 477 continue; 478 } 479 conn->num_acl_packets_sent -= num_packets; 480 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent); 481 } 482 break; 483 484 case HCI_EVENT_CONNECTION_REQUEST: 485 bt_flip_addr(addr, &packet[2]); 486 // TODO: eval COD 8-10 487 link_type = packet[11]; 488 log_info("Connection_incoming: %s, type %u\n", bd_addr_to_str(addr), link_type); 489 if (link_type == 1) { // ACL 490 conn = connection_for_address(addr); 491 if (!conn) { 492 conn = create_connection_for_addr(addr); 493 } 494 if (!conn) { 495 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 496 hci_stack.decline_reason = 0x0d; 497 BD_ADDR_COPY(hci_stack.decline_addr, addr); 498 break; 499 } 500 conn->state = RECEIVED_CONNECTION_REQUEST; 501 hci_run(); 502 } else { 503 // SYNCHRONOUS CONNECTION LIMIT TO A DEVICE EXCEEDED (0X0A) 504 hci_stack.decline_reason = 0x0a; 505 BD_ADDR_COPY(hci_stack.decline_addr, addr); 506 } 507 break; 508 509 case HCI_EVENT_CONNECTION_COMPLETE: 510 // Connection management 511 bt_flip_addr(addr, &packet[5]); 512 log_info("Connection_complete (status=%u) %s\n", packet[2], bd_addr_to_str(addr)); 513 conn = connection_for_address(addr); 514 if (conn) { 515 if (!packet[2]){ 516 conn->state = OPEN; 517 conn->con_handle = READ_BT_16(packet, 3); 518 519 // restart timer 520 run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 521 run_loop_add_timer(&conn->timeout); 522 523 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 524 525 hci_emit_nr_connections_changed(); 526 } else { 527 // connection failed, remove entry 528 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 529 btstack_memory_hci_connection_free( conn ); 530 531 // if authentication error, also delete link key 532 if (packet[2] == 0x05) { 533 hci_drop_link_key_for_bd_addr(&addr); 534 } 535 } 536 } 537 break; 538 539 case HCI_EVENT_LINK_KEY_REQUEST: 540 log_info("HCI_EVENT_LINK_KEY_REQUEST\n"); 541 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 542 if (!hci_stack.remote_device_db) break; 543 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 544 hci_run(); 545 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 546 return; 547 548 case HCI_EVENT_LINK_KEY_NOTIFICATION: 549 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_NOTIFICATION); 550 if (!hci_stack.remote_device_db) break; 551 bt_flip_addr(addr, &packet[2]); 552 hci_stack.remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8]); 553 // still forward event to allow dismiss of pairing dialog 554 break; 555 556 case HCI_EVENT_PIN_CODE_REQUEST: 557 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_PIN_CODE_REQUEST); 558 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 559 if (!hci_stack.remote_device_db) break; 560 bt_flip_addr(addr, &packet[2]); 561 hci_stack.remote_device_db->delete_link_key(&addr); 562 break; 563 564 case HCI_EVENT_IO_CAPABILITY_REQUEST: 565 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 566 if (hci_stack.ssp_io_capability == SSP_IO_CAPABILITY_UNKNOWN) break; 567 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 568 break; 569 570 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 571 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_USER_CONFIRM_REQUEST); 572 if (!hci_stack.ssp_auto_accept) break; 573 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 574 break; 575 576 case HCI_EVENT_USER_PASSKEY_REQUEST: 577 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_USER_PASSKEY_REQUEST); 578 if (!hci_stack.ssp_auto_accept) break; 579 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 580 break; 581 582 #ifndef EMBEDDED 583 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 584 if (!hci_stack.remote_device_db) break; 585 if (packet[2]) break; // status not ok 586 bt_flip_addr(addr, &packet[3]); 587 // fix for invalid remote names - terminate on 0xff 588 for (i=0; i<248;i++){ 589 if (packet[9+i] == 0xff){ 590 packet[9+i] = 0; 591 break; 592 } 593 } 594 memset(&device_name, 0, sizeof(device_name_t)); 595 strncpy((char*) device_name, (char*) &packet[9], 248); 596 hci_stack.remote_device_db->put_name(&addr, &device_name); 597 break; 598 599 case HCI_EVENT_INQUIRY_RESULT: 600 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 601 if (!hci_stack.remote_device_db) break; 602 // first send inq result packet 603 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 604 // then send cached remote names 605 for (i=0; i<packet[2];i++){ 606 bt_flip_addr(addr, &packet[3+i*6]); 607 if (hci_stack.remote_device_db->get_name(&addr, &device_name)){ 608 hci_emit_remote_name_cached(&addr, &device_name); 609 } 610 } 611 return; 612 #endif 613 614 case HCI_EVENT_DISCONNECTION_COMPLETE: 615 if (!packet[2]){ 616 handle = READ_BT_16(packet, 3); 617 hci_connection_t * conn = connection_for_handle(handle); 618 if (conn) { 619 hci_shutdown_connection(conn); 620 } 621 } 622 break; 623 624 case HCI_EVENT_HARDWARE_ERROR: 625 if(hci_stack.control->hw_error){ 626 (*hci_stack.control->hw_error)(); 627 } 628 break; 629 630 #ifdef HAVE_BLE 631 case HCI_EVENT_LE_META: 632 switch (packet[2]) { 633 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 634 // Connection management 635 bt_flip_addr(addr, &packet[8]); 636 log_info("LE Connection_complete (status=%u) %s\n", packet[3], bd_addr_to_str(addr)); 637 // LE connections are auto-accepted, so just create a connection if there isn't one already 638 conn = connection_for_address(addr); 639 if (packet[3]){ 640 if (conn){ 641 // outgoing connection failed, remove entry 642 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 643 btstack_memory_hci_connection_free( conn ); 644 645 } 646 // if authentication error, also delete link key 647 if (packet[3] == 0x05) { 648 hci_drop_link_key_for_bd_addr(&addr); 649 } 650 break; 651 } 652 if (!conn){ 653 conn = create_connection_for_addr(addr); 654 } 655 if (!conn){ 656 // no memory 657 break; 658 } 659 660 conn->state = OPEN; 661 conn->con_handle = READ_BT_16(packet, 4); 662 663 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 664 665 // restart timer 666 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 667 // run_loop_add_timer(&conn->timeout); 668 669 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 670 671 hci_emit_nr_connections_changed(); 672 break; 673 674 default: 675 break; 676 } 677 break; 678 #endif 679 680 default: 681 break; 682 } 683 684 // handle BT initialization 685 if (hci_stack.state == HCI_STATE_INITIALIZING){ 686 // handle H4 synchronization loss on restart 687 // if (hci_stack.substate == 1 && packet[0] == HCI_EVENT_HARDWARE_ERROR){ 688 // hci_stack.substate = 0; 689 // } 690 // handle normal init sequence 691 if (hci_stack.substate % 2){ 692 // odd: waiting for event 693 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE || packet[0] == HCI_EVENT_COMMAND_STATUS){ 694 hci_stack.substate++; 695 } 696 } 697 } 698 699 // help with BT sleep 700 if (hci_stack.state == HCI_STATE_FALLING_ASLEEP 701 && hci_stack.substate == 1 702 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 703 hci_stack.substate++; 704 } 705 706 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 707 708 // execute main loop 709 hci_run(); 710 } 711 712 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 713 switch (packet_type) { 714 case HCI_EVENT_PACKET: 715 event_handler(packet, size); 716 break; 717 case HCI_ACL_DATA_PACKET: 718 acl_handler(packet, size); 719 break; 720 default: 721 break; 722 } 723 } 724 725 /** Register HCI packet handlers */ 726 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 727 hci_stack.packet_handler = handler; 728 } 729 730 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 731 732 // reference to use transport layer implementation 733 hci_stack.hci_transport = transport; 734 735 // references to used control implementation 736 hci_stack.control = control; 737 738 // reference to used config 739 hci_stack.config = config; 740 741 // no connections yet 742 hci_stack.connections = NULL; 743 hci_stack.discoverable = 0; 744 hci_stack.connectable = 0; 745 746 // no pending cmds 747 hci_stack.decline_reason = 0; 748 hci_stack.new_scan_enable_value = 0xff; 749 750 // higher level handler 751 hci_stack.packet_handler = dummy_handler; 752 753 // store and open remote device db 754 hci_stack.remote_device_db = remote_device_db; 755 if (hci_stack.remote_device_db) { 756 hci_stack.remote_device_db->open(); 757 } 758 759 // max acl payload size defined in config.h 760 hci_stack.acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 761 762 // register packet handlers with transport 763 transport->register_packet_handler(&packet_handler); 764 765 hci_stack.state = HCI_STATE_OFF; 766 767 // class of device 768 hci_stack.class_of_device = 0x007a020c; // Smartphone 769 770 // Secure Simple Pairing 771 hci_stack.ssp_enable = 0; 772 hci_stack.ssp_io_capability = SSP_IO_CAPABILITY_UNKNOWN; 773 hci_stack.ssp_authentication_requirement = 0; 774 } 775 776 void hci_close(){ 777 // close remote device db 778 if (hci_stack.remote_device_db) { 779 hci_stack.remote_device_db->close(); 780 } 781 while (hci_stack.connections) { 782 hci_shutdown_connection((hci_connection_t *) hci_stack.connections); 783 } 784 hci_power_control(HCI_POWER_OFF); 785 } 786 787 // State-Module-Driver overview 788 // state module low-level 789 // HCI_STATE_OFF off close 790 // HCI_STATE_INITIALIZING, on open 791 // HCI_STATE_WORKING, on open 792 // HCI_STATE_HALTING, on open 793 // HCI_STATE_SLEEPING, off/sleep close 794 // HCI_STATE_FALLING_ASLEEP on open 795 796 static int hci_power_control_on(void){ 797 798 // power on 799 int err = 0; 800 if (hci_stack.control && hci_stack.control->on){ 801 err = (*hci_stack.control->on)(hci_stack.config); 802 } 803 if (err){ 804 log_error( "POWER_ON failed\n"); 805 hci_emit_hci_open_failed(); 806 return err; 807 } 808 809 // open low-level device 810 err = hci_stack.hci_transport->open(hci_stack.config); 811 if (err){ 812 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 813 if (hci_stack.control && hci_stack.control->off){ 814 (*hci_stack.control->off)(hci_stack.config); 815 } 816 hci_emit_hci_open_failed(); 817 return err; 818 } 819 return 0; 820 } 821 822 static void hci_power_control_off(void){ 823 824 log_info("hci_power_control_off\n"); 825 826 // close low-level device 827 hci_stack.hci_transport->close(hci_stack.config); 828 829 log_info("hci_power_control_off - hci_transport closed\n"); 830 831 // power off 832 if (hci_stack.control && hci_stack.control->off){ 833 (*hci_stack.control->off)(hci_stack.config); 834 } 835 836 log_info("hci_power_control_off - control closed\n"); 837 838 hci_stack.state = HCI_STATE_OFF; 839 } 840 841 static void hci_power_control_sleep(void){ 842 843 log_info("hci_power_control_sleep\n"); 844 845 #if 0 846 // don't close serial port during sleep 847 848 // close low-level device 849 hci_stack.hci_transport->close(hci_stack.config); 850 #endif 851 852 // sleep mode 853 if (hci_stack.control && hci_stack.control->sleep){ 854 (*hci_stack.control->sleep)(hci_stack.config); 855 } 856 857 hci_stack.state = HCI_STATE_SLEEPING; 858 } 859 860 static int hci_power_control_wake(void){ 861 862 log_info("hci_power_control_wake\n"); 863 864 // wake on 865 if (hci_stack.control && hci_stack.control->wake){ 866 (*hci_stack.control->wake)(hci_stack.config); 867 } 868 869 #if 0 870 // open low-level device 871 int err = hci_stack.hci_transport->open(hci_stack.config); 872 if (err){ 873 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 874 if (hci_stack.control && hci_stack.control->off){ 875 (*hci_stack.control->off)(hci_stack.config); 876 } 877 hci_emit_hci_open_failed(); 878 return err; 879 } 880 #endif 881 882 return 0; 883 } 884 885 886 int hci_power_control(HCI_POWER_MODE power_mode){ 887 888 log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack.state); 889 890 int err = 0; 891 switch (hci_stack.state){ 892 893 case HCI_STATE_OFF: 894 switch (power_mode){ 895 case HCI_POWER_ON: 896 err = hci_power_control_on(); 897 if (err) return err; 898 // set up state machine 899 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 900 hci_stack.state = HCI_STATE_INITIALIZING; 901 hci_stack.substate = 0; 902 break; 903 case HCI_POWER_OFF: 904 // do nothing 905 break; 906 case HCI_POWER_SLEEP: 907 // do nothing (with SLEEP == OFF) 908 break; 909 } 910 break; 911 912 case HCI_STATE_INITIALIZING: 913 switch (power_mode){ 914 case HCI_POWER_ON: 915 // do nothing 916 break; 917 case HCI_POWER_OFF: 918 // no connections yet, just turn it off 919 hci_power_control_off(); 920 break; 921 case HCI_POWER_SLEEP: 922 // no connections yet, just turn it off 923 hci_power_control_sleep(); 924 break; 925 } 926 break; 927 928 case HCI_STATE_WORKING: 929 switch (power_mode){ 930 case HCI_POWER_ON: 931 // do nothing 932 break; 933 case HCI_POWER_OFF: 934 // see hci_run 935 hci_stack.state = HCI_STATE_HALTING; 936 break; 937 case HCI_POWER_SLEEP: 938 // see hci_run 939 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 940 hci_stack.substate = 0; 941 break; 942 } 943 break; 944 945 case HCI_STATE_HALTING: 946 switch (power_mode){ 947 case HCI_POWER_ON: 948 // set up state machine 949 hci_stack.state = HCI_STATE_INITIALIZING; 950 hci_stack.substate = 0; 951 break; 952 case HCI_POWER_OFF: 953 // do nothing 954 break; 955 case HCI_POWER_SLEEP: 956 // see hci_run 957 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 958 hci_stack.substate = 0; 959 break; 960 } 961 break; 962 963 case HCI_STATE_FALLING_ASLEEP: 964 switch (power_mode){ 965 case HCI_POWER_ON: 966 967 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 968 // nothing to do, if H4 supports power management 969 if (bt_control_iphone_power_management_enabled()){ 970 hci_stack.state = HCI_STATE_INITIALIZING; 971 hci_stack.substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 972 break; 973 } 974 #endif 975 // set up state machine 976 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 977 hci_stack.state = HCI_STATE_INITIALIZING; 978 hci_stack.substate = 0; 979 break; 980 case HCI_POWER_OFF: 981 // see hci_run 982 hci_stack.state = HCI_STATE_HALTING; 983 break; 984 case HCI_POWER_SLEEP: 985 // do nothing 986 break; 987 } 988 break; 989 990 case HCI_STATE_SLEEPING: 991 switch (power_mode){ 992 case HCI_POWER_ON: 993 994 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 995 // nothing to do, if H4 supports power management 996 if (bt_control_iphone_power_management_enabled()){ 997 hci_stack.state = HCI_STATE_INITIALIZING; 998 hci_stack.substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 999 hci_update_scan_enable(); 1000 break; 1001 } 1002 #endif 1003 err = hci_power_control_wake(); 1004 if (err) return err; 1005 // set up state machine 1006 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 1007 hci_stack.state = HCI_STATE_INITIALIZING; 1008 hci_stack.substate = 0; 1009 break; 1010 case HCI_POWER_OFF: 1011 hci_stack.state = HCI_STATE_HALTING; 1012 break; 1013 case HCI_POWER_SLEEP: 1014 // do nothing 1015 break; 1016 } 1017 break; 1018 } 1019 1020 // create internal event 1021 hci_emit_state(); 1022 1023 // trigger next/first action 1024 hci_run(); 1025 1026 return 0; 1027 } 1028 1029 static void hci_update_scan_enable(void){ 1030 // 2 = page scan, 1 = inq scan 1031 hci_stack.new_scan_enable_value = hci_stack.connectable << 1 | hci_stack.discoverable; 1032 hci_run(); 1033 } 1034 1035 void hci_discoverable_control(uint8_t enable){ 1036 if (enable) enable = 1; // normalize argument 1037 1038 if (hci_stack.discoverable == enable){ 1039 hci_emit_discoverable_enabled(hci_stack.discoverable); 1040 return; 1041 } 1042 1043 hci_stack.discoverable = enable; 1044 hci_update_scan_enable(); 1045 } 1046 1047 void hci_connectable_control(uint8_t enable){ 1048 if (enable) enable = 1; // normalize argument 1049 1050 // don't emit event 1051 if (hci_stack.connectable == enable) return; 1052 1053 hci_stack.connectable = enable; 1054 hci_update_scan_enable(); 1055 } 1056 1057 void hci_run(){ 1058 1059 hci_connection_t * connection; 1060 linked_item_t * it; 1061 1062 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1063 1064 // global/non-connection oriented commands 1065 1066 // decline incoming connections 1067 if (hci_stack.decline_reason){ 1068 uint8_t reason = hci_stack.decline_reason; 1069 hci_stack.decline_reason = 0; 1070 hci_send_cmd(&hci_reject_connection_request, hci_stack.decline_addr, reason); 1071 return; 1072 } 1073 1074 // send scan enable 1075 if (hci_stack.state == HCI_STATE_WORKING && hci_stack.new_scan_enable_value != 0xff){ 1076 hci_send_cmd(&hci_write_scan_enable, hci_stack.new_scan_enable_value); 1077 hci_stack.new_scan_enable_value = 0xff; 1078 return; 1079 } 1080 1081 // send pending HCI commands 1082 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 1083 1084 connection = (hci_connection_t *) it; 1085 1086 if (connection->state == RECEIVED_CONNECTION_REQUEST){ 1087 log_info("sending hci_accept_connection_request\n"); 1088 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 1089 connection->state = ACCEPTED_CONNECTION_REQUEST; 1090 return; 1091 } 1092 1093 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 1094 link_key_t link_key; 1095 log_info("responding to link key request\n"); 1096 if ( hci_stack.remote_device_db->get_link_key( &connection->address, &link_key)){ 1097 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 1098 } else { 1099 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 1100 } 1101 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 1102 return; 1103 } 1104 1105 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 1106 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack.ssp_io_capability, NULL, hci_stack.ssp_authentication_requirement); 1107 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 1108 return; 1109 } 1110 1111 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 1112 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 1113 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 1114 return; 1115 } 1116 1117 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 1118 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 1119 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 1120 return; 1121 } 1122 } 1123 1124 switch (hci_stack.state){ 1125 case HCI_STATE_INITIALIZING: 1126 // log_info("hci_init: substate %u\n", hci_stack.substate); 1127 if (hci_stack.substate % 2) { 1128 // odd: waiting for command completion 1129 return; 1130 } 1131 switch (hci_stack.substate >> 1){ 1132 case 0: // RESET 1133 hci_send_cmd(&hci_reset); 1134 if (hci_stack.config == 0 || ((hci_uart_config_t *)hci_stack.config)->baudrate_main == 0){ 1135 // skip baud change 1136 hci_stack.substate = 4; // >> 1 = 2 1137 } 1138 break; 1139 case 1: // SEND BAUD CHANGE 1140 hci_stack.control->baudrate_cmd(hci_stack.config, ((hci_uart_config_t *)hci_stack.config)->baudrate_main, hci_stack.hci_packet_buffer); 1141 hci_send_cmd_packet(hci_stack.hci_packet_buffer, 3 + hci_stack.hci_packet_buffer[2]); 1142 break; 1143 case 2: // LOCAL BAUD CHANGE 1144 hci_stack.hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack.config)->baudrate_main); 1145 hci_stack.substate += 2; 1146 // break missing here for fall through 1147 1148 case 3: 1149 // custom initialization 1150 if (hci_stack.control && hci_stack.control->next_cmd){ 1151 int valid_cmd = (*hci_stack.control->next_cmd)(hci_stack.config, hci_stack.hci_packet_buffer); 1152 if (valid_cmd){ 1153 int size = 3 + hci_stack.hci_packet_buffer[2]; 1154 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack.hci_packet_buffer, size); 1155 hci_stack.substate = 4; // more init commands 1156 break; 1157 } 1158 log_info("hci_run: init script done\n\r"); 1159 } 1160 // otherwise continue 1161 hci_send_cmd(&hci_read_bd_addr); 1162 break; 1163 case 4: 1164 hci_send_cmd(&hci_read_buffer_size); 1165 break; 1166 case 5: 1167 // ca. 15 sec 1168 hci_send_cmd(&hci_write_page_timeout, 0x6000); 1169 break; 1170 case 6: 1171 hci_send_cmd(&hci_read_local_supported_features); 1172 break; 1173 case 7: 1174 hci_send_cmd(&hci_write_class_of_device, hci_stack.class_of_device); 1175 break; 1176 case 8: 1177 if (hci_stack.local_name){ 1178 hci_send_cmd(&hci_write_local_name, hci_stack.local_name); 1179 } else { 1180 char hostname[30]; 1181 #ifdef EMBEDDED 1182 // BTstack-11:22:33:44:55:66 1183 strcpy(hostname, "BTstack "); 1184 strcat(hostname, bd_addr_to_str(hci_stack.local_bd_addr)); 1185 printf("---> Name %s\n", hostname); 1186 #else 1187 // hostname for POSIX systems 1188 gethostname(hostname, 30); 1189 hostname[29] = '\0'; 1190 #endif 1191 hci_send_cmd(&hci_write_local_name, hostname); 1192 } 1193 break; 1194 case 9: 1195 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0xFFFFFFFF); ///0x1DFFFFFF 1196 break; 1197 case 10: 1198 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack.ssp_enable); 1199 break; 1200 case 11: 1201 hci_send_cmd(&hci_write_scan_enable, (hci_stack.connectable << 1) | hci_stack.discoverable); // page scan 1202 break; 1203 case 12: 1204 // done. 1205 hci_stack.state = HCI_STATE_WORKING; 1206 hci_emit_state(); 1207 break; 1208 default: 1209 break; 1210 } 1211 hci_stack.substate++; 1212 break; 1213 1214 case HCI_STATE_HALTING: 1215 1216 log_info("HCI_STATE_HALTING\n"); 1217 // close all open connections 1218 connection = (hci_connection_t *) hci_stack.connections; 1219 if (connection){ 1220 1221 // send disconnect 1222 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1223 1224 log_info("HCI_STATE_HALTING, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1225 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1226 1227 // send disconnected event right away - causes higher layer connections to get closed, too. 1228 hci_shutdown_connection(connection); 1229 return; 1230 } 1231 log_info("HCI_STATE_HALTING, calling off\n"); 1232 1233 // switch mode 1234 hci_power_control_off(); 1235 1236 log_info("HCI_STATE_HALTING, emitting state\n"); 1237 hci_emit_state(); 1238 log_info("HCI_STATE_HALTING, done\n"); 1239 break; 1240 1241 case HCI_STATE_FALLING_ASLEEP: 1242 switch(hci_stack.substate) { 1243 case 0: 1244 log_info("HCI_STATE_FALLING_ASLEEP\n"); 1245 // close all open connections 1246 connection = (hci_connection_t *) hci_stack.connections; 1247 1248 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1249 // don't close connections, if H4 supports power management 1250 if (bt_control_iphone_power_management_enabled()){ 1251 connection = NULL; 1252 } 1253 #endif 1254 if (connection){ 1255 1256 // send disconnect 1257 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1258 1259 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1260 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1261 1262 // send disconnected event right away - causes higher layer connections to get closed, too. 1263 hci_shutdown_connection(connection); 1264 return; 1265 } 1266 1267 // disable page and inquiry scan 1268 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1269 1270 log_info("HCI_STATE_HALTING, disabling inq cans\n"); 1271 hci_send_cmd(&hci_write_scan_enable, hci_stack.connectable << 1); // drop inquiry scan but keep page scan 1272 1273 // continue in next sub state 1274 hci_stack.substate++; 1275 break; 1276 case 1: 1277 // wait for command complete "hci_write_scan_enable" in event_handler(); 1278 break; 1279 case 2: 1280 log_info("HCI_STATE_HALTING, calling sleep\n"); 1281 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1282 // don't actually go to sleep, if H4 supports power management 1283 if (bt_control_iphone_power_management_enabled()){ 1284 // SLEEP MODE reached 1285 hci_stack.state = HCI_STATE_SLEEPING; 1286 hci_emit_state(); 1287 break; 1288 } 1289 #endif 1290 // switch mode 1291 hci_power_control_sleep(); // changes hci_stack.state to SLEEP 1292 hci_emit_state(); 1293 break; 1294 1295 default: 1296 break; 1297 } 1298 break; 1299 1300 default: 1301 break; 1302 } 1303 } 1304 1305 int hci_send_cmd_packet(uint8_t *packet, int size){ 1306 bd_addr_t addr; 1307 hci_connection_t * conn; 1308 // house-keeping 1309 1310 // create_connection? 1311 if (IS_COMMAND(packet, hci_create_connection)){ 1312 bt_flip_addr(addr, &packet[3]); 1313 log_info("Create_connection to %s\n", bd_addr_to_str(addr)); 1314 conn = connection_for_address(addr); 1315 if (conn) { 1316 // if connection exists 1317 if (conn->state == OPEN) { 1318 // and OPEN, emit connection complete command 1319 hci_emit_connection_complete(conn, 0); 1320 } 1321 // otherwise, just ignore as it is already in the open process 1322 return 0; // don't sent packet to controller 1323 1324 } 1325 // create connection struct and register, state = SENT_CREATE_CONNECTION 1326 conn = create_connection_for_addr(addr); 1327 if (!conn){ 1328 // notify client that alloc failed 1329 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 1330 return 0; // don't sent packet to controller 1331 } 1332 conn->state = SENT_CREATE_CONNECTION; 1333 } 1334 1335 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1336 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1337 } 1338 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1339 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1340 } 1341 if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 1342 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 1343 } 1344 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 1345 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 1346 } 1347 1348 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1349 if (hci_stack.remote_device_db){ 1350 bt_flip_addr(addr, &packet[3]); 1351 hci_stack.remote_device_db->delete_link_key(&addr); 1352 } 1353 } 1354 1355 hci_stack.num_cmd_packets--; 1356 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1357 } 1358 1359 // Configure Secure Simple Pairing 1360 1361 // enable will enable SSP during init 1362 void hci_ssp_set_enable(int enable){ 1363 hci_stack.ssp_enable = enable; 1364 } 1365 1366 // if set, BTstack will respond to io capability request using authentication requirement 1367 void hci_ssp_set_io_capability(int io_capability){ 1368 hci_stack.ssp_io_capability = io_capability; 1369 } 1370 void hci_ssp_set_authentication_requirement(int authentication_requirement){ 1371 hci_stack.ssp_authentication_requirement = authentication_requirement; 1372 } 1373 1374 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 1375 void hci_ssp_set_auto_accept(int auto_accept){ 1376 hci_stack.ssp_auto_accept = auto_accept; 1377 } 1378 1379 /** 1380 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1381 */ 1382 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1383 va_list argptr; 1384 va_start(argptr, cmd); 1385 uint16_t size = hci_create_cmd_internal(hci_stack.hci_packet_buffer, cmd, argptr); 1386 va_end(argptr); 1387 return hci_send_cmd_packet(hci_stack.hci_packet_buffer, size); 1388 } 1389 1390 // Create various non-HCI events. 1391 // TODO: generalize, use table similar to hci_create_command 1392 1393 void hci_emit_state(){ 1394 log_info("BTSTACK_EVENT_STATE %u", hci_stack.state); 1395 uint8_t event[3]; 1396 event[0] = BTSTACK_EVENT_STATE; 1397 event[1] = sizeof(event) - 2; 1398 event[2] = hci_stack.state; 1399 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1400 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1401 } 1402 1403 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 1404 uint8_t event[13]; 1405 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1406 event[1] = sizeof(event) - 2; 1407 event[2] = status; 1408 bt_store_16(event, 3, conn->con_handle); 1409 bt_flip_addr(&event[5], conn->address); 1410 event[11] = 1; // ACL connection 1411 event[12] = 0; // encryption disabled 1412 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1413 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1414 } 1415 1416 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 1417 uint8_t event[6]; 1418 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1419 event[1] = sizeof(event) - 2; 1420 event[2] = 0; // status = OK 1421 bt_store_16(event, 3, handle); 1422 event[5] = reason; 1423 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1424 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1425 } 1426 1427 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1428 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 1429 uint8_t event[4]; 1430 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 1431 event[1] = sizeof(event) - 2; 1432 bt_store_16(event, 2, conn->con_handle); 1433 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1434 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1435 } 1436 1437 void hci_emit_nr_connections_changed(){ 1438 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 1439 uint8_t event[3]; 1440 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 1441 event[1] = sizeof(event) - 2; 1442 event[2] = nr_hci_connections(); 1443 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1444 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1445 } 1446 1447 void hci_emit_hci_open_failed(){ 1448 log_info("BTSTACK_EVENT_POWERON_FAILED"); 1449 uint8_t event[2]; 1450 event[0] = BTSTACK_EVENT_POWERON_FAILED; 1451 event[1] = sizeof(event) - 2; 1452 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1453 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1454 } 1455 1456 #ifndef EMBEDDED 1457 void hci_emit_btstack_version() { 1458 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 1459 uint8_t event[6]; 1460 event[0] = BTSTACK_EVENT_VERSION; 1461 event[1] = sizeof(event) - 2; 1462 event[2] = BTSTACK_MAJOR; 1463 event[3] = BTSTACK_MINOR; 1464 bt_store_16(event, 4, BTSTACK_REVISION); 1465 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1466 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1467 } 1468 #endif 1469 1470 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 1471 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 1472 uint8_t event[3]; 1473 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 1474 event[1] = sizeof(event) - 2; 1475 event[2] = enabled; 1476 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1477 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1478 } 1479 1480 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 1481 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 1482 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 1483 event[1] = sizeof(event) - 2 - 1; 1484 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 1485 bt_flip_addr(&event[3], *addr); 1486 memcpy(&event[9], name, 248); 1487 1488 event[9+248] = 0; // assert \0 for log_info 1489 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(*addr), &event[9]); 1490 1491 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 1492 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 1493 } 1494 1495 void hci_emit_discoverable_enabled(uint8_t enabled){ 1496 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 1497 uint8_t event[3]; 1498 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 1499 event[1] = sizeof(event) - 2; 1500 event[2] = enabled; 1501 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1502 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1503 } 1504