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], SENT_IO_CAPABILITIES_REPLY); 568 break; 569 570 #ifndef EMBEDDED 571 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 572 if (!hci_stack.remote_device_db) break; 573 if (packet[2]) break; // status not ok 574 bt_flip_addr(addr, &packet[3]); 575 // fix for invalid remote names - terminate on 0xff 576 for (i=0; i<248;i++){ 577 if (packet[9+i] == 0xff){ 578 packet[9+i] = 0; 579 break; 580 } 581 } 582 memset(&device_name, 0, sizeof(device_name_t)); 583 strncpy((char*) device_name, (char*) &packet[9], 248); 584 hci_stack.remote_device_db->put_name(&addr, &device_name); 585 break; 586 587 case HCI_EVENT_INQUIRY_RESULT: 588 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 589 if (!hci_stack.remote_device_db) break; 590 // first send inq result packet 591 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 592 // then send cached remote names 593 for (i=0; i<packet[2];i++){ 594 bt_flip_addr(addr, &packet[3+i*6]); 595 if (hci_stack.remote_device_db->get_name(&addr, &device_name)){ 596 hci_emit_remote_name_cached(&addr, &device_name); 597 } 598 } 599 return; 600 #endif 601 602 case HCI_EVENT_DISCONNECTION_COMPLETE: 603 if (!packet[2]){ 604 handle = READ_BT_16(packet, 3); 605 hci_connection_t * conn = connection_for_handle(handle); 606 if (conn) { 607 hci_shutdown_connection(conn); 608 } 609 } 610 break; 611 612 case HCI_EVENT_HARDWARE_ERROR: 613 if(hci_stack.control->hw_error){ 614 (*hci_stack.control->hw_error)(); 615 } 616 break; 617 618 #ifdef HAVE_BLE 619 case HCI_EVENT_LE_META: 620 switch (packet[2]) { 621 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 622 // Connection management 623 bt_flip_addr(addr, &packet[8]); 624 log_info("LE Connection_complete (status=%u) %s\n", packet[3], bd_addr_to_str(addr)); 625 // LE connections are auto-accepted, so just create a connection if there isn't one already 626 conn = connection_for_address(addr); 627 if (packet[3]){ 628 if (conn){ 629 // outgoing connection failed, remove entry 630 linked_list_remove(&hci_stack.connections, (linked_item_t *) conn); 631 btstack_memory_hci_connection_free( conn ); 632 633 } 634 // if authentication error, also delete link key 635 if (packet[3] == 0x05) { 636 hci_drop_link_key_for_bd_addr(&addr); 637 } 638 break; 639 } 640 if (!conn){ 641 conn = create_connection_for_addr(addr); 642 } 643 if (!conn){ 644 // no memory 645 break; 646 } 647 648 conn->state = OPEN; 649 conn->con_handle = READ_BT_16(packet, 4); 650 651 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 652 653 // restart timer 654 // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 655 // run_loop_add_timer(&conn->timeout); 656 657 log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address)); 658 659 hci_emit_nr_connections_changed(); 660 break; 661 662 default: 663 break; 664 } 665 break; 666 #endif 667 668 default: 669 break; 670 } 671 672 // handle BT initialization 673 if (hci_stack.state == HCI_STATE_INITIALIZING){ 674 // handle H4 synchronization loss on restart 675 // if (hci_stack.substate == 1 && packet[0] == HCI_EVENT_HARDWARE_ERROR){ 676 // hci_stack.substate = 0; 677 // } 678 // handle normal init sequence 679 if (hci_stack.substate % 2){ 680 // odd: waiting for event 681 if (packet[0] == HCI_EVENT_COMMAND_COMPLETE || packet[0] == HCI_EVENT_COMMAND_STATUS){ 682 hci_stack.substate++; 683 } 684 } 685 } 686 687 // help with BT sleep 688 if (hci_stack.state == HCI_STATE_FALLING_ASLEEP 689 && hci_stack.substate == 1 690 && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){ 691 hci_stack.substate++; 692 } 693 694 hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size); 695 696 // execute main loop 697 hci_run(); 698 } 699 700 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 701 switch (packet_type) { 702 case HCI_EVENT_PACKET: 703 event_handler(packet, size); 704 break; 705 case HCI_ACL_DATA_PACKET: 706 acl_handler(packet, size); 707 break; 708 default: 709 break; 710 } 711 } 712 713 /** Register HCI packet handlers */ 714 void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){ 715 hci_stack.packet_handler = handler; 716 } 717 718 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){ 719 720 // reference to use transport layer implementation 721 hci_stack.hci_transport = transport; 722 723 // references to used control implementation 724 hci_stack.control = control; 725 726 // reference to used config 727 hci_stack.config = config; 728 729 // no connections yet 730 hci_stack.connections = NULL; 731 hci_stack.discoverable = 0; 732 hci_stack.connectable = 0; 733 734 // no pending cmds 735 hci_stack.decline_reason = 0; 736 hci_stack.new_scan_enable_value = 0xff; 737 738 // higher level handler 739 hci_stack.packet_handler = dummy_handler; 740 741 // store and open remote device db 742 hci_stack.remote_device_db = remote_device_db; 743 if (hci_stack.remote_device_db) { 744 hci_stack.remote_device_db->open(); 745 } 746 747 // max acl payload size defined in config.h 748 hci_stack.acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 749 750 // register packet handlers with transport 751 transport->register_packet_handler(&packet_handler); 752 753 hci_stack.state = HCI_STATE_OFF; 754 755 // class of device 756 hci_stack.class_of_device = 0x007a020c; // Smartphone 757 758 // Secure Simple Pairing 759 hci_stack.ssp_enable = 0; 760 hci_stack.ssp_io_capability = SSP_IO_CAPABILITY_UNKNOWN; 761 hci_stack.ssp_authentication_requirement = 0; 762 } 763 764 void hci_close(){ 765 // close remote device db 766 if (hci_stack.remote_device_db) { 767 hci_stack.remote_device_db->close(); 768 } 769 while (hci_stack.connections) { 770 hci_shutdown_connection((hci_connection_t *) hci_stack.connections); 771 } 772 hci_power_control(HCI_POWER_OFF); 773 } 774 775 // State-Module-Driver overview 776 // state module low-level 777 // HCI_STATE_OFF off close 778 // HCI_STATE_INITIALIZING, on open 779 // HCI_STATE_WORKING, on open 780 // HCI_STATE_HALTING, on open 781 // HCI_STATE_SLEEPING, off/sleep close 782 // HCI_STATE_FALLING_ASLEEP on open 783 784 static int hci_power_control_on(void){ 785 786 // power on 787 int err = 0; 788 if (hci_stack.control && hci_stack.control->on){ 789 err = (*hci_stack.control->on)(hci_stack.config); 790 } 791 if (err){ 792 log_error( "POWER_ON failed\n"); 793 hci_emit_hci_open_failed(); 794 return err; 795 } 796 797 // open low-level device 798 err = hci_stack.hci_transport->open(hci_stack.config); 799 if (err){ 800 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 801 if (hci_stack.control && hci_stack.control->off){ 802 (*hci_stack.control->off)(hci_stack.config); 803 } 804 hci_emit_hci_open_failed(); 805 return err; 806 } 807 return 0; 808 } 809 810 static void hci_power_control_off(void){ 811 812 log_info("hci_power_control_off\n"); 813 814 // close low-level device 815 hci_stack.hci_transport->close(hci_stack.config); 816 817 log_info("hci_power_control_off - hci_transport closed\n"); 818 819 // power off 820 if (hci_stack.control && hci_stack.control->off){ 821 (*hci_stack.control->off)(hci_stack.config); 822 } 823 824 log_info("hci_power_control_off - control closed\n"); 825 826 hci_stack.state = HCI_STATE_OFF; 827 } 828 829 static void hci_power_control_sleep(void){ 830 831 log_info("hci_power_control_sleep\n"); 832 833 #if 0 834 // don't close serial port during sleep 835 836 // close low-level device 837 hci_stack.hci_transport->close(hci_stack.config); 838 #endif 839 840 // sleep mode 841 if (hci_stack.control && hci_stack.control->sleep){ 842 (*hci_stack.control->sleep)(hci_stack.config); 843 } 844 845 hci_stack.state = HCI_STATE_SLEEPING; 846 } 847 848 static int hci_power_control_wake(void){ 849 850 log_info("hci_power_control_wake\n"); 851 852 // wake on 853 if (hci_stack.control && hci_stack.control->wake){ 854 (*hci_stack.control->wake)(hci_stack.config); 855 } 856 857 #if 0 858 // open low-level device 859 int err = hci_stack.hci_transport->open(hci_stack.config); 860 if (err){ 861 log_error( "HCI_INIT failed, turning Bluetooth off again\n"); 862 if (hci_stack.control && hci_stack.control->off){ 863 (*hci_stack.control->off)(hci_stack.config); 864 } 865 hci_emit_hci_open_failed(); 866 return err; 867 } 868 #endif 869 870 return 0; 871 } 872 873 874 int hci_power_control(HCI_POWER_MODE power_mode){ 875 876 log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack.state); 877 878 int err = 0; 879 switch (hci_stack.state){ 880 881 case HCI_STATE_OFF: 882 switch (power_mode){ 883 case HCI_POWER_ON: 884 err = hci_power_control_on(); 885 if (err) return err; 886 // set up state machine 887 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 888 hci_stack.state = HCI_STATE_INITIALIZING; 889 hci_stack.substate = 0; 890 break; 891 case HCI_POWER_OFF: 892 // do nothing 893 break; 894 case HCI_POWER_SLEEP: 895 // do nothing (with SLEEP == OFF) 896 break; 897 } 898 break; 899 900 case HCI_STATE_INITIALIZING: 901 switch (power_mode){ 902 case HCI_POWER_ON: 903 // do nothing 904 break; 905 case HCI_POWER_OFF: 906 // no connections yet, just turn it off 907 hci_power_control_off(); 908 break; 909 case HCI_POWER_SLEEP: 910 // no connections yet, just turn it off 911 hci_power_control_sleep(); 912 break; 913 } 914 break; 915 916 case HCI_STATE_WORKING: 917 switch (power_mode){ 918 case HCI_POWER_ON: 919 // do nothing 920 break; 921 case HCI_POWER_OFF: 922 // see hci_run 923 hci_stack.state = HCI_STATE_HALTING; 924 break; 925 case HCI_POWER_SLEEP: 926 // see hci_run 927 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 928 hci_stack.substate = 0; 929 break; 930 } 931 break; 932 933 case HCI_STATE_HALTING: 934 switch (power_mode){ 935 case HCI_POWER_ON: 936 // set up state machine 937 hci_stack.state = HCI_STATE_INITIALIZING; 938 hci_stack.substate = 0; 939 break; 940 case HCI_POWER_OFF: 941 // do nothing 942 break; 943 case HCI_POWER_SLEEP: 944 // see hci_run 945 hci_stack.state = HCI_STATE_FALLING_ASLEEP; 946 hci_stack.substate = 0; 947 break; 948 } 949 break; 950 951 case HCI_STATE_FALLING_ASLEEP: 952 switch (power_mode){ 953 case HCI_POWER_ON: 954 955 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 956 // nothing to do, if H4 supports power management 957 if (bt_control_iphone_power_management_enabled()){ 958 hci_stack.state = HCI_STATE_INITIALIZING; 959 hci_stack.substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 960 break; 961 } 962 #endif 963 // set up state machine 964 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 965 hci_stack.state = HCI_STATE_INITIALIZING; 966 hci_stack.substate = 0; 967 break; 968 case HCI_POWER_OFF: 969 // see hci_run 970 hci_stack.state = HCI_STATE_HALTING; 971 break; 972 case HCI_POWER_SLEEP: 973 // do nothing 974 break; 975 } 976 break; 977 978 case HCI_STATE_SLEEPING: 979 switch (power_mode){ 980 case HCI_POWER_ON: 981 982 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 983 // nothing to do, if H4 supports power management 984 if (bt_control_iphone_power_management_enabled()){ 985 hci_stack.state = HCI_STATE_INITIALIZING; 986 hci_stack.substate = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP; 987 hci_update_scan_enable(); 988 break; 989 } 990 #endif 991 err = hci_power_control_wake(); 992 if (err) return err; 993 // set up state machine 994 hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent 995 hci_stack.state = HCI_STATE_INITIALIZING; 996 hci_stack.substate = 0; 997 break; 998 case HCI_POWER_OFF: 999 hci_stack.state = HCI_STATE_HALTING; 1000 break; 1001 case HCI_POWER_SLEEP: 1002 // do nothing 1003 break; 1004 } 1005 break; 1006 } 1007 1008 // create internal event 1009 hci_emit_state(); 1010 1011 // trigger next/first action 1012 hci_run(); 1013 1014 return 0; 1015 } 1016 1017 static void hci_update_scan_enable(void){ 1018 // 2 = page scan, 1 = inq scan 1019 hci_stack.new_scan_enable_value = hci_stack.connectable << 1 | hci_stack.discoverable; 1020 hci_run(); 1021 } 1022 1023 void hci_discoverable_control(uint8_t enable){ 1024 if (enable) enable = 1; // normalize argument 1025 1026 if (hci_stack.discoverable == enable){ 1027 hci_emit_discoverable_enabled(hci_stack.discoverable); 1028 return; 1029 } 1030 1031 hci_stack.discoverable = enable; 1032 hci_update_scan_enable(); 1033 } 1034 1035 void hci_connectable_control(uint8_t enable){ 1036 if (enable) enable = 1; // normalize argument 1037 1038 // don't emit event 1039 if (hci_stack.connectable == enable) return; 1040 1041 hci_stack.connectable = enable; 1042 hci_update_scan_enable(); 1043 } 1044 1045 void hci_run(){ 1046 1047 hci_connection_t * connection; 1048 linked_item_t * it; 1049 1050 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1051 1052 // global/non-connection oriented commands 1053 1054 // decline incoming connections 1055 if (hci_stack.decline_reason){ 1056 uint8_t reason = hci_stack.decline_reason; 1057 hci_stack.decline_reason = 0; 1058 hci_send_cmd(&hci_reject_connection_request, hci_stack.decline_addr, reason); 1059 } 1060 1061 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1062 1063 // send scan enable 1064 if (hci_stack.state == HCI_STATE_WORKING && hci_stack.new_scan_enable_value != 0xff){ 1065 hci_send_cmd(&hci_write_scan_enable, hci_stack.new_scan_enable_value); 1066 hci_stack.new_scan_enable_value = 0xff; 1067 } 1068 1069 // send pending HCI commands 1070 for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){ 1071 1072 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1073 1074 connection = (hci_connection_t *) it; 1075 1076 if (connection->state == RECEIVED_CONNECTION_REQUEST){ 1077 log_info("sending hci_accept_connection_request\n"); 1078 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 1079 connection->state = ACCEPTED_CONNECTION_REQUEST; 1080 } 1081 1082 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1083 1084 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 1085 link_key_t link_key; 1086 log_info("responding to link key request\n"); 1087 if ( hci_stack.remote_device_db->get_link_key( &connection->address, &link_key)){ 1088 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 1089 } else { 1090 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 1091 } 1092 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 1093 } 1094 1095 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1096 1097 if (connection->authentication_flags & SENT_IO_CAPABILITIES_REPLY){ 1098 hci_send_cmd(&hci_io_capability_request_reply, hci_stack.ssp_io_capability, NULL, hci_stack.ssp_authentication_requirement); 1099 connectionClearAuthenticationFlags(connection, SENT_IO_CAPABILITIES_REPLY); 1100 } 1101 } 1102 1103 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1104 1105 switch (hci_stack.state){ 1106 case HCI_STATE_INITIALIZING: 1107 // log_info("hci_init: substate %u\n", hci_stack.substate); 1108 if (hci_stack.substate % 2) { 1109 // odd: waiting for command completion 1110 return; 1111 } 1112 switch (hci_stack.substate >> 1){ 1113 case 0: // RESET 1114 hci_send_cmd(&hci_reset); 1115 if (hci_stack.config == 0 || ((hci_uart_config_t *)hci_stack.config)->baudrate_main == 0){ 1116 // skip baud change 1117 hci_stack.substate = 4; // >> 1 = 2 1118 } 1119 break; 1120 case 1: // SEND BAUD CHANGE 1121 hci_stack.control->baudrate_cmd(hci_stack.config, ((hci_uart_config_t *)hci_stack.config)->baudrate_main, hci_stack.hci_packet_buffer); 1122 hci_send_cmd_packet(hci_stack.hci_packet_buffer, 3 + hci_stack.hci_packet_buffer[2]); 1123 break; 1124 case 2: // LOCAL BAUD CHANGE 1125 hci_stack.hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack.config)->baudrate_main); 1126 hci_stack.substate += 2; 1127 // break missing here for fall through 1128 1129 case 3: 1130 // custom initialization 1131 if (hci_stack.control && hci_stack.control->next_cmd){ 1132 int valid_cmd = (*hci_stack.control->next_cmd)(hci_stack.config, hci_stack.hci_packet_buffer); 1133 if (valid_cmd){ 1134 int size = 3 + hci_stack.hci_packet_buffer[2]; 1135 hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack.hci_packet_buffer, size); 1136 hci_stack.substate = 4; // more init commands 1137 break; 1138 } 1139 log_info("hci_run: init script done\n\r"); 1140 } 1141 // otherwise continue 1142 hci_send_cmd(&hci_read_bd_addr); 1143 break; 1144 case 4: 1145 hci_send_cmd(&hci_read_buffer_size); 1146 break; 1147 case 5: 1148 // ca. 15 sec 1149 hci_send_cmd(&hci_write_page_timeout, 0x6000); 1150 break; 1151 case 6: 1152 hci_send_cmd(&hci_read_local_supported_features); 1153 break; 1154 case 7: 1155 hci_send_cmd(&hci_write_class_of_device, hci_stack.class_of_device); 1156 break; 1157 case 8: 1158 if (hci_stack.local_name){ 1159 hci_send_cmd(&hci_write_local_name, hci_stack.local_name); 1160 } else { 1161 char hostname[30]; 1162 #ifdef EMBEDDED 1163 // BTstack-11:22:33:44:55:66 1164 strcpy(hostname, "BTstack "); 1165 strcat(hostname, bd_addr_to_str(hci_stack.local_bd_addr)); 1166 printf("---> Name %s\n", hostname); 1167 #else 1168 // hostname for POSIX systems 1169 gethostname(hostname, 30); 1170 hostname[29] = '\0'; 1171 #endif 1172 hci_send_cmd(&hci_write_local_name, hostname); 1173 } 1174 break; 1175 case 9: 1176 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0xFFFFFFFF); ///0x1DFFFFFF 1177 break; 1178 case 10: 1179 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack.ssp_enable); 1180 break; 1181 case 11: 1182 hci_send_cmd(&hci_write_scan_enable, (hci_stack.connectable << 1) | hci_stack.discoverable); // page scan 1183 break; 1184 case 12: 1185 // done. 1186 hci_stack.state = HCI_STATE_WORKING; 1187 hci_emit_state(); 1188 break; 1189 default: 1190 break; 1191 } 1192 hci_stack.substate++; 1193 break; 1194 1195 case HCI_STATE_HALTING: 1196 1197 log_info("HCI_STATE_HALTING\n"); 1198 // close all open connections 1199 connection = (hci_connection_t *) hci_stack.connections; 1200 if (connection){ 1201 1202 // send disconnect 1203 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1204 1205 log_info("HCI_STATE_HALTING, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1206 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1207 1208 // send disconnected event right away - causes higher layer connections to get closed, too. 1209 hci_shutdown_connection(connection); 1210 return; 1211 } 1212 log_info("HCI_STATE_HALTING, calling off\n"); 1213 1214 // switch mode 1215 hci_power_control_off(); 1216 1217 log_info("HCI_STATE_HALTING, emitting state\n"); 1218 hci_emit_state(); 1219 log_info("HCI_STATE_HALTING, done\n"); 1220 break; 1221 1222 case HCI_STATE_FALLING_ASLEEP: 1223 switch(hci_stack.substate) { 1224 case 0: 1225 log_info("HCI_STATE_FALLING_ASLEEP\n"); 1226 // close all open connections 1227 connection = (hci_connection_t *) hci_stack.connections; 1228 1229 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1230 // don't close connections, if H4 supports power management 1231 if (bt_control_iphone_power_management_enabled()){ 1232 connection = NULL; 1233 } 1234 #endif 1235 if (connection){ 1236 1237 // send disconnect 1238 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1239 1240 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle); 1241 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 1242 1243 // send disconnected event right away - causes higher layer connections to get closed, too. 1244 hci_shutdown_connection(connection); 1245 return; 1246 } 1247 1248 // disable page and inquiry scan 1249 if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return; 1250 1251 log_info("HCI_STATE_HALTING, disabling inq cans\n"); 1252 hci_send_cmd(&hci_write_scan_enable, hci_stack.connectable << 1); // drop inquiry scan but keep page scan 1253 1254 // continue in next sub state 1255 hci_stack.substate++; 1256 break; 1257 case 1: 1258 // wait for command complete "hci_write_scan_enable" in event_handler(); 1259 break; 1260 case 2: 1261 log_info("HCI_STATE_HALTING, calling sleep\n"); 1262 #if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL) 1263 // don't actually go to sleep, if H4 supports power management 1264 if (bt_control_iphone_power_management_enabled()){ 1265 // SLEEP MODE reached 1266 hci_stack.state = HCI_STATE_SLEEPING; 1267 hci_emit_state(); 1268 break; 1269 } 1270 #endif 1271 // switch mode 1272 hci_power_control_sleep(); // changes hci_stack.state to SLEEP 1273 hci_emit_state(); 1274 break; 1275 1276 default: 1277 break; 1278 } 1279 break; 1280 1281 default: 1282 break; 1283 } 1284 } 1285 1286 int hci_send_cmd_packet(uint8_t *packet, int size){ 1287 bd_addr_t addr; 1288 hci_connection_t * conn; 1289 // house-keeping 1290 1291 // create_connection? 1292 if (IS_COMMAND(packet, hci_create_connection)){ 1293 bt_flip_addr(addr, &packet[3]); 1294 log_info("Create_connection to %s\n", bd_addr_to_str(addr)); 1295 conn = connection_for_address(addr); 1296 if (conn) { 1297 // if connection exists 1298 if (conn->state == OPEN) { 1299 // and OPEN, emit connection complete command 1300 hci_emit_connection_complete(conn, 0); 1301 } 1302 // otherwise, just ignore as it is already in the open process 1303 return 0; // don't sent packet to controller 1304 1305 } 1306 // create connection struct and register, state = SENT_CREATE_CONNECTION 1307 conn = create_connection_for_addr(addr); 1308 if (!conn){ 1309 // notify client that alloc failed 1310 hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED); 1311 return 0; // don't sent packet to controller 1312 } 1313 conn->state = SENT_CREATE_CONNECTION; 1314 } 1315 1316 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 1317 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 1318 } 1319 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 1320 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 1321 } 1322 if (IS_COMMAND(packet, hci_pin_code_request_reply)){ 1323 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY); 1324 } 1325 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){ 1326 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY); 1327 } 1328 1329 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 1330 if (hci_stack.remote_device_db){ 1331 bt_flip_addr(addr, &packet[3]); 1332 hci_stack.remote_device_db->delete_link_key(&addr); 1333 } 1334 } 1335 1336 hci_stack.num_cmd_packets--; 1337 return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 1338 } 1339 1340 /** 1341 * pre: numcmds >= 0 - it's allowed to send a command to the controller 1342 */ 1343 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 1344 va_list argptr; 1345 va_start(argptr, cmd); 1346 uint16_t size = hci_create_cmd_internal(hci_stack.hci_packet_buffer, cmd, argptr); 1347 va_end(argptr); 1348 return hci_send_cmd_packet(hci_stack.hci_packet_buffer, size); 1349 } 1350 1351 // Create various non-HCI events. 1352 // TODO: generalize, use table similar to hci_create_command 1353 1354 void hci_emit_state(){ 1355 log_info("BTSTACK_EVENT_STATE %u", hci_stack.state); 1356 uint8_t event[3]; 1357 event[0] = BTSTACK_EVENT_STATE; 1358 event[1] = sizeof(event) - 2; 1359 event[2] = hci_stack.state; 1360 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1361 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1362 } 1363 1364 void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){ 1365 uint8_t event[13]; 1366 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 1367 event[1] = sizeof(event) - 2; 1368 event[2] = status; 1369 bt_store_16(event, 3, conn->con_handle); 1370 bt_flip_addr(&event[5], conn->address); 1371 event[11] = 1; // ACL connection 1372 event[12] = 0; // encryption disabled 1373 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1374 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1375 } 1376 1377 void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){ 1378 uint8_t event[6]; 1379 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 1380 event[1] = sizeof(event) - 2; 1381 event[2] = 0; // status = OK 1382 bt_store_16(event, 3, handle); 1383 event[5] = reason; 1384 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1385 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1386 } 1387 1388 void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 1389 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 1390 uint8_t event[4]; 1391 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 1392 event[1] = sizeof(event) - 2; 1393 bt_store_16(event, 2, conn->con_handle); 1394 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1395 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1396 } 1397 1398 void hci_emit_nr_connections_changed(){ 1399 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 1400 uint8_t event[3]; 1401 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 1402 event[1] = sizeof(event) - 2; 1403 event[2] = nr_hci_connections(); 1404 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1405 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1406 } 1407 1408 void hci_emit_hci_open_failed(){ 1409 log_info("BTSTACK_EVENT_POWERON_FAILED"); 1410 uint8_t event[2]; 1411 event[0] = BTSTACK_EVENT_POWERON_FAILED; 1412 event[1] = sizeof(event) - 2; 1413 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1414 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1415 } 1416 1417 #ifndef EMBEDDED 1418 void hci_emit_btstack_version() { 1419 log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR); 1420 uint8_t event[6]; 1421 event[0] = BTSTACK_EVENT_VERSION; 1422 event[1] = sizeof(event) - 2; 1423 event[2] = BTSTACK_MAJOR; 1424 event[3] = BTSTACK_MINOR; 1425 bt_store_16(event, 4, BTSTACK_REVISION); 1426 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1427 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1428 } 1429 #endif 1430 1431 void hci_emit_system_bluetooth_enabled(uint8_t enabled){ 1432 log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", enabled); 1433 uint8_t event[3]; 1434 event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED; 1435 event[1] = sizeof(event) - 2; 1436 event[2] = enabled; 1437 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1438 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1439 } 1440 1441 void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){ 1442 uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info 1443 event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED; 1444 event[1] = sizeof(event) - 2 - 1; 1445 event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 1446 bt_flip_addr(&event[3], *addr); 1447 memcpy(&event[9], name, 248); 1448 1449 event[9+248] = 0; // assert \0 for log_info 1450 log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(*addr), &event[9]); 1451 1452 hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1); 1453 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1); 1454 } 1455 1456 void hci_emit_discoverable_enabled(uint8_t enabled){ 1457 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 1458 uint8_t event[3]; 1459 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 1460 event[1] = sizeof(event) - 2; 1461 event[2] = enabled; 1462 hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event)); 1463 hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event)); 1464 } 1465