1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 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 BLUEKITCHEN GMBH 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 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #endif 63 64 #include <stdarg.h> 65 #include <string.h> 66 #include <stdio.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 #define HCI_RESET_RESEND_TIMEOUT_MS 200 98 99 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 100 #ifndef GAP_INQUIRY_MAX_NAME_LEN 101 #define GAP_INQUIRY_MAX_NAME_LEN 32 102 #endif 103 104 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 105 #define GAP_INQUIRY_DURATION_MIN 0x01 106 #define GAP_INQUIRY_DURATION_MAX 0x30 107 #define GAP_INQUIRY_STATE_ACTIVE 0x80 108 #define GAP_INQUIRY_STATE_IDLE 0 109 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 110 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 111 112 // GAP Remote Name Request 113 #define GAP_REMOTE_NAME_STATE_IDLE 0 114 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 115 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 116 117 // GAP Pairing 118 #define GAP_PAIRING_STATE_IDLE 0 119 #define GAP_PAIRING_STATE_SEND_PIN 1 120 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 121 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 122 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 123 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 124 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 125 126 127 // prototypes 128 #ifdef ENABLE_CLASSIC 129 static void hci_update_scan_enable(void); 130 static void hci_emit_discoverable_enabled(uint8_t enabled); 131 static int hci_local_ssp_activated(void); 132 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 133 static void hci_notify_if_sco_can_send_now(void); 134 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 135 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 136 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 137 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 138 static void hci_connection_timestamp(hci_connection_t *connection); 139 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 140 static void gap_inquiry_explode(uint8_t * packet); 141 #endif 142 143 static int hci_power_control_on(void); 144 static void hci_power_control_off(void); 145 static void hci_state_reset(void); 146 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 147 static void hci_emit_nr_connections_changed(void); 148 static void hci_emit_hci_open_failed(void); 149 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 150 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 151 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 152 static void hci_run(void); 153 static int hci_is_le_connection(hci_connection_t * connection); 154 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 155 156 #ifdef ENABLE_BLE 157 #ifdef ENABLE_LE_CENTRAL 158 // called from test/ble_client/advertising_data_parser.c 159 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 160 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 161 static hci_connection_t * gap_get_outgoing_connection(void); 162 #endif 163 #endif 164 165 // the STACK is here 166 #ifndef HAVE_MALLOC 167 static hci_stack_t hci_stack_static; 168 #endif 169 static hci_stack_t * hci_stack = NULL; 170 171 #ifdef ENABLE_CLASSIC 172 // default name 173 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 174 175 // test helper 176 static uint8_t disable_l2cap_timeouts = 0; 177 #endif 178 179 /** 180 * create connection for given address 181 * 182 * @return connection OR NULL, if no memory left 183 */ 184 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 185 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 186 hci_connection_t * conn = btstack_memory_hci_connection_get(); 187 if (!conn) return NULL; 188 memset(conn, 0, sizeof(hci_connection_t)); 189 bd_addr_copy(conn->address, addr); 190 conn->address_type = addr_type; 191 conn->con_handle = 0xffff; 192 conn->authentication_flags = AUTH_FLAGS_NONE; 193 conn->bonding_flags = 0; 194 conn->requested_security_level = LEVEL_0; 195 #ifdef ENABLE_CLASSIC 196 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 197 btstack_run_loop_set_timer_context(&conn->timeout, conn); 198 hci_connection_timestamp(conn); 199 #endif 200 conn->acl_recombination_length = 0; 201 conn->acl_recombination_pos = 0; 202 conn->num_acl_packets_sent = 0; 203 conn->num_sco_packets_sent = 0; 204 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 205 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 206 return conn; 207 } 208 209 210 /** 211 * get le connection parameter range 212 * 213 * @return le connection parameter range struct 214 */ 215 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 216 *range = hci_stack->le_connection_parameter_range; 217 } 218 219 /** 220 * set le connection parameter range 221 * 222 */ 223 224 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 225 hci_stack->le_connection_parameter_range = *range; 226 } 227 228 /** 229 * get hci connections iterator 230 * 231 * @return hci connections iterator 232 */ 233 234 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 235 btstack_linked_list_iterator_init(it, &hci_stack->connections); 236 } 237 238 /** 239 * get connection for a given handle 240 * 241 * @return connection OR NULL, if not found 242 */ 243 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 244 btstack_linked_list_iterator_t it; 245 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 246 while (btstack_linked_list_iterator_has_next(&it)){ 247 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 248 if ( item->con_handle == con_handle ) { 249 return item; 250 } 251 } 252 return NULL; 253 } 254 255 /** 256 * get connection for given address 257 * 258 * @return connection OR NULL, if not found 259 */ 260 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 261 btstack_linked_list_iterator_t it; 262 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 263 while (btstack_linked_list_iterator_has_next(&it)){ 264 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 265 if (connection->address_type != addr_type) continue; 266 if (memcmp(addr, connection->address, 6) != 0) continue; 267 return connection; 268 } 269 return NULL; 270 } 271 272 273 #ifdef ENABLE_CLASSIC 274 275 #ifdef ENABLE_SCO_OVER_HCI 276 static int hci_number_sco_connections(void){ 277 int connections = 0; 278 btstack_linked_list_iterator_t it; 279 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 280 while (btstack_linked_list_iterator_has_next(&it)){ 281 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 282 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 283 connections++; 284 } 285 return connections; 286 } 287 #endif 288 289 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 290 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 291 #ifdef HAVE_EMBEDDED_TICK 292 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 293 // connections might be timed out 294 hci_emit_l2cap_check_timeout(connection); 295 } 296 #else 297 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 298 // connections might be timed out 299 hci_emit_l2cap_check_timeout(connection); 300 } 301 #endif 302 } 303 304 static void hci_connection_timestamp(hci_connection_t *connection){ 305 #ifdef HAVE_EMBEDDED_TICK 306 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 307 #else 308 connection->timestamp = btstack_run_loop_get_time_ms(); 309 #endif 310 } 311 312 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 313 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 314 } 315 316 317 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 318 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 319 } 320 321 /** 322 * add authentication flags and reset timer 323 * @note: assumes classic connection 324 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 325 */ 326 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 327 bd_addr_t addr; 328 reverse_bd_addr(bd_addr, addr); 329 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 330 if (conn) { 331 connectionSetAuthenticationFlags(conn, flags); 332 hci_connection_timestamp(conn); 333 } 334 } 335 336 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 337 hci_connection_t * conn = hci_connection_for_handle(handle); 338 if (!conn) return 0; 339 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 340 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 341 return 0; 342 } 343 344 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 345 if (!hci_stack->link_key_db) return; 346 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 347 hci_stack->link_key_db->delete_link_key(addr); 348 } 349 350 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 351 if (!hci_stack->link_key_db) return; 352 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 353 hci_stack->link_key_db->put_link_key(addr, link_key, type); 354 } 355 #endif 356 357 static int hci_is_le_connection(hci_connection_t * connection){ 358 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 359 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 360 } 361 362 /** 363 * count connections 364 */ 365 static int nr_hci_connections(void){ 366 int count = 0; 367 btstack_linked_item_t *it; 368 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 369 return count; 370 } 371 372 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 373 374 unsigned int num_packets_sent_classic = 0; 375 unsigned int num_packets_sent_le = 0; 376 377 btstack_linked_item_t *it; 378 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 379 hci_connection_t * connection = (hci_connection_t *) it; 380 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 381 num_packets_sent_classic += connection->num_acl_packets_sent; 382 } else { 383 num_packets_sent_le += connection->num_acl_packets_sent; 384 } 385 } 386 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 387 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 388 int free_slots_le = 0; 389 390 if (free_slots_classic < 0){ 391 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 392 return 0; 393 } 394 395 if (hci_stack->le_acl_packets_total_num){ 396 // if we have LE slots, they are used 397 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 398 if (free_slots_le < 0){ 399 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 400 return 0; 401 } 402 } else { 403 // otherwise, classic slots are used for LE, too 404 free_slots_classic -= num_packets_sent_le; 405 if (free_slots_classic < 0){ 406 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 407 return 0; 408 } 409 } 410 411 switch (address_type){ 412 case BD_ADDR_TYPE_UNKNOWN: 413 log_error("hci_number_free_acl_slots: unknown address type"); 414 return 0; 415 416 case BD_ADDR_TYPE_CLASSIC: 417 return free_slots_classic; 418 419 default: 420 if (hci_stack->le_acl_packets_total_num){ 421 return free_slots_le; 422 } 423 return free_slots_classic; 424 } 425 } 426 427 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 428 // get connection type 429 hci_connection_t * connection = hci_connection_for_handle(con_handle); 430 if (!connection){ 431 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 432 return 0; 433 } 434 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 435 } 436 437 #ifdef ENABLE_CLASSIC 438 static int hci_number_free_sco_slots(void){ 439 unsigned int num_sco_packets_sent = 0; 440 btstack_linked_item_t *it; 441 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 442 hci_connection_t * connection = (hci_connection_t *) it; 443 num_sco_packets_sent += connection->num_sco_packets_sent; 444 } 445 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 446 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 447 return 0; 448 } 449 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 450 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 451 } 452 #endif 453 454 // only used to send HCI Host Number Completed Packets 455 static int hci_can_send_comand_packet_transport(void){ 456 if (hci_stack->hci_packet_buffer_reserved) return 0; 457 458 // check for async hci transport implementations 459 if (hci_stack->hci_transport->can_send_packet_now){ 460 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 461 return 0; 462 } 463 } 464 return 1; 465 } 466 467 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 468 int hci_can_send_command_packet_now(void){ 469 if (hci_can_send_comand_packet_transport() == 0) return 0; 470 return hci_stack->num_cmd_packets > 0; 471 } 472 473 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 474 // check for async hci transport implementations 475 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 476 return hci_stack->hci_transport->can_send_packet_now(packet_type); 477 } 478 479 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 480 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 481 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 482 } 483 484 int hci_can_send_acl_le_packet_now(void){ 485 if (hci_stack->hci_packet_buffer_reserved) return 0; 486 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 487 } 488 489 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 490 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 491 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 492 } 493 494 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 495 if (hci_stack->hci_packet_buffer_reserved) return 0; 496 return hci_can_send_prepared_acl_packet_now(con_handle); 497 } 498 499 #ifdef ENABLE_CLASSIC 500 int hci_can_send_acl_classic_packet_now(void){ 501 if (hci_stack->hci_packet_buffer_reserved) return 0; 502 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 503 } 504 505 int hci_can_send_prepared_sco_packet_now(void){ 506 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 507 if (!hci_stack->synchronous_flow_control_enabled) return 1; 508 return hci_number_free_sco_slots() > 0; 509 } 510 511 int hci_can_send_sco_packet_now(void){ 512 if (hci_stack->hci_packet_buffer_reserved) return 0; 513 return hci_can_send_prepared_sco_packet_now(); 514 } 515 516 void hci_request_sco_can_send_now_event(void){ 517 hci_stack->sco_waiting_for_can_send_now = 1; 518 hci_notify_if_sco_can_send_now(); 519 } 520 #endif 521 522 // used for internal checks in l2cap.c 523 int hci_is_packet_buffer_reserved(void){ 524 return hci_stack->hci_packet_buffer_reserved; 525 } 526 527 // reserves outgoing packet buffer. @returns 1 if successful 528 int hci_reserve_packet_buffer(void){ 529 if (hci_stack->hci_packet_buffer_reserved) { 530 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 531 return 0; 532 } 533 hci_stack->hci_packet_buffer_reserved = 1; 534 return 1; 535 } 536 537 void hci_release_packet_buffer(void){ 538 hci_stack->hci_packet_buffer_reserved = 0; 539 } 540 541 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 542 static int hci_transport_synchronous(void){ 543 return hci_stack->hci_transport->can_send_packet_now == NULL; 544 } 545 546 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 547 548 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 549 550 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 551 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 552 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 553 max_acl_data_packet_length = hci_stack->le_data_packets_length; 554 } 555 556 // testing: reduce buffer to minimum 557 // max_acl_data_packet_length = 52; 558 559 log_debug("hci_send_acl_packet_fragments entered"); 560 561 int err; 562 // multiple packets could be send on a synchronous HCI transport 563 while (1){ 564 565 log_debug("hci_send_acl_packet_fragments loop entered"); 566 567 // get current data 568 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 569 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 570 int more_fragments = 0; 571 572 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 573 if (current_acl_data_packet_length > max_acl_data_packet_length){ 574 more_fragments = 1; 575 current_acl_data_packet_length = max_acl_data_packet_length; 576 } 577 578 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 579 if (acl_header_pos > 0){ 580 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 581 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 582 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 583 } 584 585 // update header len 586 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 587 588 // count packet 589 connection->num_acl_packets_sent++; 590 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 591 592 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 593 if (more_fragments){ 594 // update start of next fragment to send 595 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 596 } else { 597 // done 598 hci_stack->acl_fragmentation_pos = 0; 599 hci_stack->acl_fragmentation_total_size = 0; 600 } 601 602 // send packet 603 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 604 const int size = current_acl_data_packet_length + 4; 605 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 606 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 607 608 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 609 610 // done yet? 611 if (!more_fragments) break; 612 613 // can send more? 614 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 615 } 616 617 log_debug("hci_send_acl_packet_fragments loop over"); 618 619 // release buffer now for synchronous transport 620 if (hci_transport_synchronous()){ 621 hci_release_packet_buffer(); 622 // notify upper stack that it might be possible to send again 623 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 624 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 625 } 626 627 return err; 628 } 629 630 // pre: caller has reserved the packet buffer 631 int hci_send_acl_packet_buffer(int size){ 632 633 // log_info("hci_send_acl_packet_buffer size %u", size); 634 635 if (!hci_stack->hci_packet_buffer_reserved) { 636 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 637 return 0; 638 } 639 640 uint8_t * packet = hci_stack->hci_packet_buffer; 641 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 642 643 // check for free places on Bluetooth module 644 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 645 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 646 hci_release_packet_buffer(); 647 return BTSTACK_ACL_BUFFERS_FULL; 648 } 649 650 hci_connection_t *connection = hci_connection_for_handle( con_handle); 651 if (!connection) { 652 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 653 hci_release_packet_buffer(); 654 return 0; 655 } 656 657 #ifdef ENABLE_CLASSIC 658 hci_connection_timestamp(connection); 659 #endif 660 661 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 662 663 // setup data 664 hci_stack->acl_fragmentation_total_size = size; 665 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 666 667 return hci_send_acl_packet_fragments(connection); 668 } 669 670 #ifdef ENABLE_CLASSIC 671 // pre: caller has reserved the packet buffer 672 int hci_send_sco_packet_buffer(int size){ 673 674 // log_info("hci_send_acl_packet_buffer size %u", size); 675 676 if (!hci_stack->hci_packet_buffer_reserved) { 677 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 678 return 0; 679 } 680 681 uint8_t * packet = hci_stack->hci_packet_buffer; 682 683 // skip checks in loopback mode 684 if (!hci_stack->loopback_mode){ 685 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 686 687 // check for free places on Bluetooth module 688 if (!hci_can_send_prepared_sco_packet_now()) { 689 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 690 hci_release_packet_buffer(); 691 return BTSTACK_ACL_BUFFERS_FULL; 692 } 693 694 // track send packet in connection struct 695 hci_connection_t *connection = hci_connection_for_handle( con_handle); 696 if (!connection) { 697 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 698 hci_release_packet_buffer(); 699 return 0; 700 } 701 connection->num_sco_packets_sent++; 702 } 703 704 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 705 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 706 707 if (hci_transport_synchronous()){ 708 hci_release_packet_buffer(); 709 // notify upper stack that it might be possible to send again 710 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 711 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 712 } 713 714 return err; 715 } 716 #endif 717 718 static void acl_handler(uint8_t *packet, int size){ 719 720 // log_info("acl_handler: size %u", size); 721 722 // get info 723 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 724 hci_connection_t *conn = hci_connection_for_handle(con_handle); 725 uint8_t acl_flags = READ_ACL_FLAGS(packet); 726 uint16_t acl_length = READ_ACL_LENGTH(packet); 727 728 // ignore non-registered handle 729 if (!conn){ 730 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 731 return; 732 } 733 734 // assert packet is complete 735 if (acl_length + 4 != size){ 736 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 737 return; 738 } 739 740 #ifdef ENABLE_CLASSIC 741 // update idle timestamp 742 hci_connection_timestamp(conn); 743 #endif 744 745 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 746 hci_stack->host_completed_packets = 1; 747 conn->num_packets_completed++; 748 #endif 749 750 // handle different packet types 751 switch (acl_flags & 0x03) { 752 753 case 0x01: // continuation fragment 754 755 // sanity checks 756 if (conn->acl_recombination_pos == 0) { 757 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 758 return; 759 } 760 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 761 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 762 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 763 conn->acl_recombination_pos = 0; 764 return; 765 } 766 767 // append fragment payload (header already stored) 768 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 769 conn->acl_recombination_pos += acl_length; 770 771 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 772 // conn->acl_recombination_pos, conn->acl_recombination_length); 773 774 // forward complete L2CAP packet if complete. 775 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 776 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 777 // reset recombination buffer 778 conn->acl_recombination_length = 0; 779 conn->acl_recombination_pos = 0; 780 } 781 break; 782 783 case 0x02: { // first fragment 784 785 // sanity check 786 if (conn->acl_recombination_pos) { 787 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 788 conn->acl_recombination_pos = 0; 789 } 790 791 // peek into L2CAP packet! 792 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 793 794 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 795 796 // compare fragment size to L2CAP packet size 797 if (acl_length >= l2cap_length + 4){ 798 // forward fragment as L2CAP packet 799 hci_emit_acl_packet(packet, acl_length + 4); 800 } else { 801 802 if (acl_length > HCI_ACL_BUFFER_SIZE){ 803 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 804 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 805 return; 806 } 807 808 // store first fragment and tweak acl length for complete package 809 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 810 conn->acl_recombination_pos = acl_length + 4; 811 conn->acl_recombination_length = l2cap_length; 812 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 813 } 814 break; 815 816 } 817 default: 818 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 819 return; 820 } 821 822 // execute main loop 823 hci_run(); 824 } 825 826 static void hci_shutdown_connection(hci_connection_t *conn){ 827 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 828 829 #ifdef ENABLE_CLASSIC 830 #ifdef ENABLE_SCO_OVER_HCI 831 int addr_type = conn->address_type; 832 #endif 833 #endif 834 835 btstack_run_loop_remove_timer(&conn->timeout); 836 837 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 838 btstack_memory_hci_connection_free( conn ); 839 840 // now it's gone 841 hci_emit_nr_connections_changed(); 842 843 #ifdef ENABLE_CLASSIC 844 #ifdef ENABLE_SCO_OVER_HCI 845 // update SCO 846 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 847 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 848 } 849 #endif 850 #endif 851 } 852 853 #ifdef ENABLE_CLASSIC 854 855 static const uint16_t packet_type_sizes[] = { 856 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 857 HCI_ACL_DH1_SIZE, 0, 0, 0, 858 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 859 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 860 }; 861 static const uint8_t packet_type_feature_requirement_bit[] = { 862 0, // 3 slot packets 863 1, // 5 slot packets 864 25, // EDR 2 mpbs 865 26, // EDR 3 mbps 866 39, // 3 slot EDR packts 867 40, // 5 slot EDR packet 868 }; 869 static const uint16_t packet_type_feature_packet_mask[] = { 870 0x0f00, // 3 slot packets 871 0xf000, // 5 slot packets 872 0x1102, // EDR 2 mpbs 873 0x2204, // EDR 3 mbps 874 0x0300, // 3 slot EDR packts 875 0x3000, // 5 slot EDR packet 876 }; 877 878 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 879 // enable packet types based on size 880 uint16_t packet_types = 0; 881 unsigned int i; 882 for (i=0;i<16;i++){ 883 if (packet_type_sizes[i] == 0) continue; 884 if (packet_type_sizes[i] <= buffer_size){ 885 packet_types |= 1 << i; 886 } 887 } 888 // disable packet types due to missing local supported features 889 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 890 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 891 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 892 if (feature_set) continue; 893 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 894 packet_types &= ~packet_type_feature_packet_mask[i]; 895 } 896 // flip bits for "may not be used" 897 packet_types ^= 0x3306; 898 return packet_types; 899 } 900 901 uint16_t hci_usable_acl_packet_types(void){ 902 return hci_stack->packet_types; 903 } 904 #endif 905 906 uint8_t* hci_get_outgoing_packet_buffer(void){ 907 // hci packet buffer is >= acl data packet length 908 return hci_stack->hci_packet_buffer; 909 } 910 911 uint16_t hci_max_acl_data_packet_length(void){ 912 return hci_stack->acl_data_packet_length; 913 } 914 915 #ifdef ENABLE_CLASSIC 916 int hci_extended_sco_link_supported(void){ 917 // No. 31, byte 3, bit 7 918 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 919 } 920 #endif 921 922 int hci_non_flushable_packet_boundary_flag_supported(void){ 923 // No. 54, byte 6, bit 6 924 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 925 } 926 927 static int gap_ssp_supported(void){ 928 // No. 51, byte 6, bit 3 929 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 930 } 931 932 static int hci_classic_supported(void){ 933 #ifdef ENABLE_CLASSIC 934 // No. 37, byte 4, bit 5, = No BR/EDR Support 935 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 936 #else 937 return 0; 938 #endif 939 } 940 941 static int hci_le_supported(void){ 942 #ifdef ENABLE_BLE 943 // No. 37, byte 4, bit 6 = LE Supported (Controller) 944 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 945 #else 946 return 0; 947 #endif 948 } 949 950 #ifdef ENABLE_BLE 951 952 /** 953 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 954 */ 955 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 956 *addr_type = hci_stack->le_own_addr_type; 957 if (hci_stack->le_own_addr_type){ 958 memcpy(addr, hci_stack->le_random_address, 6); 959 } else { 960 memcpy(addr, hci_stack->local_bd_addr, 6); 961 } 962 } 963 964 #ifdef ENABLE_LE_CENTRAL 965 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 966 967 int offset = 3; 968 int num_reports = packet[offset]; 969 offset += 1; 970 971 int i; 972 // log_info("HCI: handle adv report with num reports: %d", num_reports); 973 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 974 for (i=0; i<num_reports && offset < size;i++){ 975 uint8_t data_length = btstack_min( packet[offset + 8], LE_ADVERTISING_DATA_SIZE); 976 uint8_t event_size = 10 + data_length; 977 int pos = 0; 978 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 979 event[pos++] = event_size; 980 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 981 offset += 8; 982 pos += 8; 983 event[pos++] = packet[offset + 1 + data_length]; // rssi 984 event[pos++] = packet[offset++]; //data_length; 985 memcpy(&event[pos], &packet[offset], data_length); 986 pos += data_length; 987 offset += data_length + 1; // rssi 988 hci_emit_event(event, pos, 1); 989 } 990 } 991 #endif 992 #endif 993 994 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 995 996 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 997 if (!hci_stack->config) return 0; 998 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 999 // Limit baud rate for Broadcom chipsets to 3 mbps 1000 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 1001 baud_rate = 3000000; 1002 } 1003 return baud_rate; 1004 } 1005 1006 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1007 UNUSED(ds); 1008 1009 switch (hci_stack->substate){ 1010 case HCI_INIT_W4_SEND_RESET: 1011 log_info("Resend HCI Reset"); 1012 hci_stack->substate = HCI_INIT_SEND_RESET; 1013 hci_stack->num_cmd_packets = 1; 1014 hci_run(); 1015 break; 1016 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1017 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1018 if (hci_stack->hci_transport->reset_link){ 1019 hci_stack->hci_transport->reset_link(); 1020 } 1021 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1022 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1023 log_info("Resend HCI Reset - CSR Warm Boot"); 1024 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1025 hci_stack->num_cmd_packets = 1; 1026 hci_run(); 1027 break; 1028 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1029 if (hci_stack->hci_transport->set_baudrate){ 1030 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1031 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1032 hci_stack->hci_transport->set_baudrate(baud_rate); 1033 } 1034 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1035 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1036 if (hci_stack->hci_transport->reset_link){ 1037 log_info("Link Reset"); 1038 hci_stack->hci_transport->reset_link(); 1039 } 1040 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1041 hci_run(); 1042 } 1043 break; 1044 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1045 // otherwise continue 1046 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1047 hci_send_cmd(&hci_read_local_supported_commands); 1048 break; 1049 default: 1050 break; 1051 } 1052 } 1053 #endif 1054 1055 static void hci_initializing_next_state(void){ 1056 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1057 } 1058 1059 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_PERIPHERAL) 1060 static void hci_replace_bd_addr_placeholder(uint8_t * data, uint16_t size){ 1061 const int bd_addr_string_len = 17; 1062 int i = 0; 1063 while (i < size - bd_addr_string_len){ 1064 if (memcmp(&data[i], "00:00:00:00:00:00", bd_addr_string_len)) { 1065 i++; 1066 continue; 1067 } 1068 // set real address 1069 memcpy(&data[i], bd_addr_to_str(hci_stack->local_bd_addr), bd_addr_string_len); 1070 i += bd_addr_string_len; 1071 } 1072 } 1073 #endif 1074 1075 // assumption: hci_can_send_command_packet_now() == true 1076 static void hci_initializing_run(void){ 1077 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1078 switch (hci_stack->substate){ 1079 case HCI_INIT_SEND_RESET: 1080 hci_state_reset(); 1081 1082 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1083 // prepare reset if command complete not received in 100ms 1084 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1085 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1086 btstack_run_loop_add_timer(&hci_stack->timeout); 1087 #endif 1088 // send command 1089 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1090 hci_send_cmd(&hci_reset); 1091 break; 1092 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1093 hci_send_cmd(&hci_read_local_version_information); 1094 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1095 break; 1096 case HCI_INIT_SEND_READ_LOCAL_NAME: 1097 hci_send_cmd(&hci_read_local_name); 1098 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1099 break; 1100 1101 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1102 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1103 hci_state_reset(); 1104 // prepare reset if command complete not received in 100ms 1105 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1106 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1107 btstack_run_loop_add_timer(&hci_stack->timeout); 1108 // send command 1109 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1110 hci_send_cmd(&hci_reset); 1111 break; 1112 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1113 hci_state_reset(); 1114 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1115 hci_send_cmd(&hci_reset); 1116 break; 1117 case HCI_INIT_SEND_BAUD_CHANGE: { 1118 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1119 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1120 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1121 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1122 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1123 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1124 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1125 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1126 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1127 btstack_run_loop_add_timer(&hci_stack->timeout); 1128 } 1129 break; 1130 } 1131 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1132 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1133 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1134 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1135 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1136 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1137 break; 1138 } 1139 case HCI_INIT_CUSTOM_INIT: 1140 // Custom initialization 1141 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1142 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1143 if (valid_cmd){ 1144 int size = 3 + hci_stack->hci_packet_buffer[2]; 1145 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1146 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1147 switch (valid_cmd) { 1148 case BTSTACK_CHIPSET_VALID_COMMAND: 1149 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1150 break; 1151 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1152 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1153 log_info("CSR Warm Boot"); 1154 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1155 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1156 btstack_run_loop_add_timer(&hci_stack->timeout); 1157 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1158 && hci_stack->config 1159 && hci_stack->chipset 1160 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1161 && hci_stack->hci_transport->set_baudrate 1162 && hci_transport_uart_get_main_baud_rate()){ 1163 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1164 } else { 1165 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1166 } 1167 break; 1168 default: 1169 // should not get here 1170 break; 1171 } 1172 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1173 break; 1174 } 1175 log_info("Init script done"); 1176 1177 // Init script download on Broadcom chipsets causes: 1178 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION 1179 || hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA){ 1180 1181 // - baud rate to reset, restore UART baud rate if needed 1182 int need_baud_change = hci_stack->config 1183 && hci_stack->chipset 1184 && hci_stack->chipset->set_baudrate_command 1185 && hci_stack->hci_transport->set_baudrate 1186 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1187 if (need_baud_change) { 1188 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1189 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1190 hci_stack->hci_transport->set_baudrate(baud_rate); 1191 } 1192 1193 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1194 // -> Work around: wait a few milliseconds here. 1195 log_info("BCM delay after init script"); 1196 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1197 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1198 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1199 btstack_run_loop_add_timer(&hci_stack->timeout); 1200 break; 1201 } 1202 } 1203 // otherwise continue 1204 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1205 hci_send_cmd(&hci_read_local_supported_commands); 1206 break; 1207 case HCI_INIT_SET_BD_ADDR: 1208 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1209 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1210 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1211 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1212 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1213 break; 1214 #endif 1215 1216 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1217 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1218 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1219 hci_send_cmd(&hci_read_local_supported_commands); 1220 break; 1221 case HCI_INIT_READ_BD_ADDR: 1222 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1223 hci_send_cmd(&hci_read_bd_addr); 1224 break; 1225 case HCI_INIT_READ_BUFFER_SIZE: 1226 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1227 hci_send_cmd(&hci_read_buffer_size); 1228 break; 1229 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1230 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1231 hci_send_cmd(&hci_read_local_supported_features); 1232 break; 1233 1234 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1235 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1236 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1237 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1238 break; 1239 case HCI_INIT_HOST_BUFFER_SIZE: 1240 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1241 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1242 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1243 break; 1244 #endif 1245 1246 case HCI_INIT_SET_EVENT_MASK: 1247 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1248 if (hci_le_supported()){ 1249 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1250 } else { 1251 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1252 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1253 } 1254 break; 1255 1256 #ifdef ENABLE_CLASSIC 1257 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1258 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1259 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1260 break; 1261 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1262 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1263 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1264 break; 1265 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1266 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1267 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1268 break; 1269 case HCI_INIT_WRITE_LOCAL_NAME: { 1270 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1271 hci_reserve_packet_buffer(); 1272 uint8_t * packet = hci_stack->hci_packet_buffer; 1273 // construct HCI Command and send 1274 uint16_t opcode = hci_write_local_name.opcode; 1275 hci_stack->last_cmd_opcode = opcode; 1276 packet[0] = opcode & 0xff; 1277 packet[1] = opcode >> 8; 1278 packet[2] = DEVICE_NAME_LEN; 1279 memset(&packet[3], 0, DEVICE_NAME_LEN); 1280 memcpy(&packet[3], hci_stack->local_name, strlen(hci_stack->local_name)); 1281 // expand '00:00:00:00:00:00' in name with bd_addr 1282 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1283 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1284 break; 1285 } 1286 case HCI_INIT_WRITE_EIR_DATA: { 1287 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1288 hci_reserve_packet_buffer(); 1289 uint8_t * packet = hci_stack->hci_packet_buffer; 1290 // construct HCI Command and send 1291 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1292 hci_stack->last_cmd_opcode = opcode; 1293 packet[0] = opcode & 0xff; 1294 packet[1] = opcode >> 8; 1295 packet[2] = 1 + 240; 1296 packet[3] = 0; // FEC not required 1297 if (hci_stack->eir_data){ 1298 memcpy(&packet[4], hci_stack->eir_data, 240); 1299 } else { 1300 memset(&packet[4], 0, 240); 1301 int name_len = strlen(hci_stack->local_name); 1302 packet[4] = name_len + 1; 1303 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1304 memcpy(&packet[6], hci_stack->local_name, name_len); 1305 } 1306 // expand '00:00:00:00:00:00' in name with bd_addr 1307 hci_replace_bd_addr_placeholder(&packet[4], 240); 1308 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1309 break; 1310 } 1311 case HCI_INIT_WRITE_INQUIRY_MODE: 1312 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1313 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1314 break; 1315 case HCI_INIT_WRITE_SCAN_ENABLE: 1316 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1317 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1318 break; 1319 // only sent if ENABLE_SCO_OVER_HCI is defined 1320 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1321 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1322 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1323 break; 1324 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1325 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1326 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1327 break; 1328 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1329 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1330 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1331 log_info("BCM: Route SCO data via HCI transport"); 1332 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1333 break; 1334 1335 #endif 1336 #ifdef ENABLE_BLE 1337 // LE INIT 1338 case HCI_INIT_LE_READ_BUFFER_SIZE: 1339 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1340 hci_send_cmd(&hci_le_read_buffer_size); 1341 break; 1342 case HCI_INIT_LE_SET_EVENT_MASK: 1343 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1344 hci_send_cmd(&hci_le_set_event_mask, 0x1FF, 0x0); 1345 break; 1346 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1347 // LE Supported Host = 1, Simultaneous Host = 0 1348 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1349 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1350 break; 1351 #endif 1352 1353 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1354 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1355 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1356 hci_send_cmd(&hci_le_read_maximum_data_length); 1357 break; 1358 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1359 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1360 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1361 break; 1362 #endif 1363 1364 #ifdef ENABLE_LE_CENTRAL 1365 case HCI_INIT_READ_WHITE_LIST_SIZE: 1366 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1367 hci_send_cmd(&hci_le_read_white_list_size); 1368 break; 1369 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1370 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1371 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1372 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1373 break; 1374 #endif 1375 default: 1376 return; 1377 } 1378 } 1379 1380 static void hci_init_done(void){ 1381 // done. tell the app 1382 log_info("hci_init_done -> HCI_STATE_WORKING"); 1383 hci_stack->state = HCI_STATE_WORKING; 1384 hci_emit_state(); 1385 hci_run(); 1386 } 1387 1388 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1389 1390 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1391 1392 uint8_t command_completed = 0; 1393 1394 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1395 uint16_t opcode = little_endian_read_16(packet,3); 1396 if (opcode == hci_stack->last_cmd_opcode){ 1397 command_completed = 1; 1398 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1399 } else { 1400 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1401 } 1402 } 1403 1404 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1405 uint8_t status = packet[2]; 1406 uint16_t opcode = little_endian_read_16(packet,4); 1407 if (opcode == hci_stack->last_cmd_opcode){ 1408 if (status){ 1409 command_completed = 1; 1410 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1411 } else { 1412 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1413 } 1414 } else { 1415 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1416 } 1417 } 1418 1419 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1420 1421 // Vendor == CSR 1422 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1423 // TODO: track actual command 1424 command_completed = 1; 1425 } 1426 1427 // Vendor == Toshiba 1428 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1429 // TODO: track actual command 1430 command_completed = 1; 1431 } 1432 1433 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1434 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1435 // 1436 // HCI Reset 1437 // Timeout 100 ms 1438 // HCI Reset 1439 // Command Complete Reset 1440 // HCI Read Local Version Information 1441 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1442 // hang... 1443 // 1444 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1445 if (!command_completed 1446 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1447 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1448 1449 uint16_t opcode = little_endian_read_16(packet,3); 1450 if (opcode == hci_reset.opcode){ 1451 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1452 return; 1453 } 1454 } 1455 1456 // CSR & H5 1457 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1458 if (!command_completed 1459 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1460 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1461 1462 uint16_t opcode = little_endian_read_16(packet,3); 1463 if (opcode == hci_reset.opcode){ 1464 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1465 return; 1466 } 1467 } 1468 1469 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1470 // fix: Correct substate and behave as command below 1471 if (command_completed){ 1472 switch (hci_stack->substate){ 1473 case HCI_INIT_SEND_RESET: 1474 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1475 break; 1476 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1477 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1478 break; 1479 default: 1480 break; 1481 } 1482 } 1483 1484 #endif 1485 1486 if (!command_completed) return; 1487 1488 int need_baud_change = 0; 1489 int need_addr_change = 0; 1490 1491 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1492 need_baud_change = hci_stack->config 1493 && hci_stack->chipset 1494 && hci_stack->chipset->set_baudrate_command 1495 && hci_stack->hci_transport->set_baudrate 1496 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1497 1498 need_addr_change = hci_stack->custom_bd_addr_set 1499 && hci_stack->chipset 1500 && hci_stack->chipset->set_bd_addr_command; 1501 #endif 1502 1503 switch(hci_stack->substate){ 1504 1505 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1506 case HCI_INIT_SEND_RESET: 1507 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1508 // fix: just correct substate and behave as command below 1509 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1510 btstack_run_loop_remove_timer(&hci_stack->timeout); 1511 break; 1512 case HCI_INIT_W4_SEND_RESET: 1513 btstack_run_loop_remove_timer(&hci_stack->timeout); 1514 break; 1515 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1516 log_info("Received local name, need baud change %d", need_baud_change); 1517 if (need_baud_change){ 1518 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1519 return; 1520 } 1521 // skip baud change 1522 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1523 return; 1524 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1525 // for STLC2500D, baud rate change already happened. 1526 // for others, baud rate gets changed now 1527 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1528 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1529 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1530 hci_stack->hci_transport->set_baudrate(baud_rate); 1531 } 1532 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1533 return; 1534 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1535 btstack_run_loop_remove_timer(&hci_stack->timeout); 1536 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1537 return; 1538 case HCI_INIT_W4_CUSTOM_INIT: 1539 // repeat custom init 1540 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1541 return; 1542 #else 1543 case HCI_INIT_W4_SEND_RESET: 1544 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1545 return ; 1546 #endif 1547 1548 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1549 if (need_baud_change && 1550 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1551 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1552 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1553 return; 1554 } 1555 if (need_addr_change){ 1556 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1557 return; 1558 } 1559 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1560 return; 1561 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1562 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1563 if (need_baud_change){ 1564 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1565 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1566 hci_stack->hci_transport->set_baudrate(baud_rate); 1567 } 1568 if (need_addr_change){ 1569 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1570 return; 1571 } 1572 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1573 return; 1574 case HCI_INIT_W4_SET_BD_ADDR: 1575 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1576 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1577 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1578 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1579 return; 1580 } 1581 // skipping st warm boot 1582 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1583 return; 1584 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1585 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1586 return; 1587 #endif 1588 case HCI_INIT_W4_READ_BD_ADDR: 1589 // only read buffer size if supported 1590 if (hci_stack->local_supported_commands[0] & 0x01) { 1591 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1592 return; 1593 } 1594 // skipping read buffer size 1595 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1596 return; 1597 case HCI_INIT_W4_SET_EVENT_MASK: 1598 // skip Classic init commands for LE only chipsets 1599 if (!hci_classic_supported()){ 1600 #ifdef ENABLE_BLE 1601 if (hci_le_supported()){ 1602 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1603 return; 1604 } 1605 #endif 1606 log_error("Neither BR/EDR nor LE supported"); 1607 hci_init_done(); 1608 return; 1609 } 1610 if (!gap_ssp_supported()){ 1611 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1612 return; 1613 } 1614 break; 1615 #ifdef ENABLE_BLE 1616 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1617 // skip write le host if not supported (e.g. on LE only EM9301) 1618 if (hci_stack->local_supported_commands[0] & 0x02) break; 1619 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1620 return; 1621 1622 1623 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1624 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1625 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1626 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1627 return; 1628 } 1629 // explicit fall through to reduce repetitions 1630 #endif 1631 1632 #ifdef ENABLE_LE_CENTRAL 1633 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1634 #else 1635 hci_init_done(); 1636 #endif 1637 return; 1638 #endif 1639 1640 #ifdef ENABLE_SCO_OVER_HCI 1641 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1642 // skip write synchronous flow control if not supported 1643 if (hci_stack->local_supported_commands[0] & 0x04) break; 1644 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1645 // explicit fall through to reduce repetitions 1646 1647 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1648 // skip write default erroneous data reporting if not supported 1649 if (hci_stack->local_supported_commands[0] & 0x08) break; 1650 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1651 // explicit fall through to reduce repetitions 1652 1653 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1654 // skip bcm set sco pcm config on non-Broadcom chipsets 1655 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1656 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1657 // explicit fall through to reduce repetitions 1658 1659 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1660 if (!hci_le_supported()){ 1661 // SKIP LE init for Classic only configuration 1662 hci_init_done(); 1663 return; 1664 } 1665 break; 1666 1667 #else /* !ENABLE_SCO_OVER_HCI */ 1668 1669 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1670 #ifdef ENABLE_BLE 1671 if (hci_le_supported()){ 1672 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1673 return; 1674 } 1675 #endif 1676 // SKIP LE init for Classic only configuration 1677 hci_init_done(); 1678 return; 1679 #endif /* ENABLE_SCO_OVER_HCI */ 1680 1681 // Response to command before init done state -> init done 1682 case (HCI_INIT_DONE-1): 1683 hci_init_done(); 1684 return; 1685 1686 default: 1687 break; 1688 } 1689 hci_initializing_next_state(); 1690 } 1691 1692 static void event_handler(uint8_t *packet, int size){ 1693 1694 uint16_t event_length = packet[1]; 1695 1696 // assert packet is complete 1697 if (size != event_length + 2){ 1698 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1699 return; 1700 } 1701 1702 bd_addr_t addr; 1703 bd_addr_type_t addr_type; 1704 hci_con_handle_t handle; 1705 hci_connection_t * conn; 1706 int i; 1707 #ifdef ENABLE_CLASSIC 1708 uint8_t link_type; 1709 #endif 1710 1711 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1712 1713 switch (hci_event_packet_get_type(packet)) { 1714 1715 case HCI_EVENT_COMMAND_COMPLETE: 1716 // get num cmd packets - limit to 1 to reduce complexity 1717 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1718 1719 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1720 if (packet[5]) break; 1721 // terminate, name 248 chars 1722 packet[6+248] = 0; 1723 log_info("local name: %s", &packet[6]); 1724 } 1725 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1726 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1727 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1728 uint16_t acl_len = little_endian_read_16(packet, 6); 1729 uint16_t sco_len = packet[8]; 1730 1731 // determine usable ACL/SCO payload size 1732 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1733 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1734 1735 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1736 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1737 1738 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1739 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1740 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1741 } 1742 } 1743 #ifdef ENABLE_BLE 1744 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1745 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1746 hci_stack->le_acl_packets_total_num = packet[8]; 1747 // determine usable ACL payload size 1748 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1749 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1750 } 1751 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1752 } 1753 #endif 1754 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1755 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1756 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1757 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1758 log_info("hci_le_read_maximum_data_length: tx octets %u, tx time %u us", hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1759 } 1760 #endif 1761 #ifdef ENABLE_LE_CENTRAL 1762 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1763 hci_stack->le_whitelist_capacity = packet[6]; 1764 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1765 } 1766 #endif 1767 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1768 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1769 hci_stack->local_bd_addr); 1770 log_info("Local Address, Status: 0x%02x: Addr: %s", 1771 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1772 #ifdef ENABLE_CLASSIC 1773 if (hci_stack->link_key_db){ 1774 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1775 } 1776 #endif 1777 } 1778 #ifdef ENABLE_CLASSIC 1779 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1780 hci_emit_discoverable_enabled(hci_stack->discoverable); 1781 } 1782 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1783 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1784 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1785 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1786 hci_emit_event(event, sizeof(event), 1); 1787 } 1788 } 1789 #endif 1790 1791 // Note: HCI init checks 1792 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1793 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1794 1795 #ifdef ENABLE_CLASSIC 1796 // determine usable ACL packet types based on host buffer size and supported features 1797 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1798 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1799 #endif 1800 // Classic/LE 1801 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1802 } 1803 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1804 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1805 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1806 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1807 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1808 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1809 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1810 } 1811 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1812 hci_stack->local_supported_commands[0] = 1813 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1814 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1815 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1816 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 1817 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 1818 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2; // bit 5 = Octet 35, bit 3 1819 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1820 } 1821 #ifdef ENABLE_CLASSIC 1822 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1823 if (packet[5] == 0){ 1824 hci_stack->synchronous_flow_control_enabled = 1; 1825 } 1826 } 1827 #endif 1828 break; 1829 1830 case HCI_EVENT_COMMAND_STATUS: 1831 // get num cmd packets - limit to 1 to reduce complexity 1832 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1833 break; 1834 1835 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1836 int offset = 3; 1837 for (i=0; i<packet[2];i++){ 1838 handle = little_endian_read_16(packet, offset); 1839 offset += 2; 1840 uint16_t num_packets = little_endian_read_16(packet, offset); 1841 offset += 2; 1842 1843 conn = hci_connection_for_handle(handle); 1844 if (!conn){ 1845 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1846 continue; 1847 } 1848 1849 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1850 #ifdef ENABLE_CLASSIC 1851 if (conn->num_sco_packets_sent >= num_packets){ 1852 conn->num_sco_packets_sent -= num_packets; 1853 } else { 1854 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1855 conn->num_sco_packets_sent = 0; 1856 } 1857 hci_notify_if_sco_can_send_now(); 1858 #endif 1859 } else { 1860 if (conn->num_acl_packets_sent >= num_packets){ 1861 conn->num_acl_packets_sent -= num_packets; 1862 } else { 1863 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1864 conn->num_acl_packets_sent = 0; 1865 } 1866 } 1867 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1868 } 1869 break; 1870 } 1871 1872 #ifdef ENABLE_CLASSIC 1873 case HCI_EVENT_INQUIRY_COMPLETE: 1874 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 1875 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1876 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1877 hci_emit_event(event, sizeof(event), 1); 1878 } 1879 break; 1880 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1881 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 1882 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 1883 } 1884 break; 1885 case HCI_EVENT_CONNECTION_REQUEST: 1886 reverse_bd_addr(&packet[2], addr); 1887 // TODO: eval COD 8-10 1888 link_type = packet[11]; 1889 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1890 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1891 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1892 if (!conn) { 1893 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1894 } 1895 if (!conn) { 1896 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1897 hci_stack->decline_reason = 0x0d; 1898 bd_addr_copy(hci_stack->decline_addr, addr); 1899 break; 1900 } 1901 conn->role = HCI_ROLE_SLAVE; 1902 conn->state = RECEIVED_CONNECTION_REQUEST; 1903 // store info about eSCO 1904 if (link_type == 0x02){ 1905 conn->remote_supported_feature_eSCO = 1; 1906 } 1907 hci_run(); 1908 break; 1909 1910 case HCI_EVENT_CONNECTION_COMPLETE: 1911 // Connection management 1912 reverse_bd_addr(&packet[5], addr); 1913 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1914 addr_type = BD_ADDR_TYPE_CLASSIC; 1915 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1916 if (conn) { 1917 if (!packet[2]){ 1918 conn->state = OPEN; 1919 conn->con_handle = little_endian_read_16(packet, 3); 1920 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1921 1922 // restart timer 1923 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1924 btstack_run_loop_add_timer(&conn->timeout); 1925 1926 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1927 1928 hci_emit_nr_connections_changed(); 1929 } else { 1930 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1931 uint8_t status = packet[2]; 1932 bd_addr_t bd_address; 1933 memcpy(&bd_address, conn->address, 6); 1934 1935 // connection failed, remove entry 1936 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1937 btstack_memory_hci_connection_free( conn ); 1938 1939 // notify client if dedicated bonding 1940 if (notify_dedicated_bonding_failed){ 1941 log_info("hci notify_dedicated_bonding_failed"); 1942 hci_emit_dedicated_bonding_result(bd_address, status); 1943 } 1944 1945 // if authentication error, also delete link key 1946 if (packet[2] == 0x05) { 1947 gap_drop_link_key_for_bd_addr(addr); 1948 } 1949 } 1950 } 1951 break; 1952 1953 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1954 reverse_bd_addr(&packet[5], addr); 1955 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1956 if (packet[2]){ 1957 // connection failed 1958 break; 1959 } 1960 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1961 if (!conn) { 1962 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1963 } 1964 if (!conn) { 1965 break; 1966 } 1967 conn->state = OPEN; 1968 conn->con_handle = little_endian_read_16(packet, 3); 1969 1970 #ifdef ENABLE_SCO_OVER_HCI 1971 // update SCO 1972 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 1973 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1974 } 1975 #endif 1976 break; 1977 1978 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1979 handle = little_endian_read_16(packet, 3); 1980 conn = hci_connection_for_handle(handle); 1981 if (!conn) break; 1982 if (!packet[2]){ 1983 uint8_t * features = &packet[5]; 1984 if (features[6] & (1 << 3)){ 1985 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1986 } 1987 if (features[3] & (1<<7)){ 1988 conn->remote_supported_feature_eSCO = 1; 1989 } 1990 } 1991 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1992 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1993 if (conn->bonding_flags & BONDING_DEDICATED){ 1994 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1995 } 1996 break; 1997 1998 case HCI_EVENT_LINK_KEY_REQUEST: 1999 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2000 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2001 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2002 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2003 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2004 hci_run(); 2005 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2006 return; 2007 2008 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2009 reverse_bd_addr(&packet[2], addr); 2010 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2011 if (!conn) break; 2012 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2013 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2014 // Change Connection Encryption keeps link key type 2015 if (link_key_type != CHANGED_COMBINATION_KEY){ 2016 conn->link_key_type = link_key_type; 2017 } 2018 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2019 // still forward event to allow dismiss of pairing dialog 2020 break; 2021 } 2022 2023 case HCI_EVENT_PIN_CODE_REQUEST: 2024 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2025 // non-bondable mode: pin code negative reply will be sent 2026 if (!hci_stack->bondable){ 2027 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2028 hci_run(); 2029 return; 2030 } 2031 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2032 if (!hci_stack->link_key_db) break; 2033 hci_event_pin_code_request_get_bd_addr(packet, addr); 2034 hci_stack->link_key_db->delete_link_key(addr); 2035 break; 2036 2037 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2038 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2039 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2040 break; 2041 2042 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2043 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2044 if (!hci_stack->ssp_auto_accept) break; 2045 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2046 break; 2047 2048 case HCI_EVENT_USER_PASSKEY_REQUEST: 2049 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2050 if (!hci_stack->ssp_auto_accept) break; 2051 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2052 break; 2053 #endif 2054 2055 case HCI_EVENT_ENCRYPTION_CHANGE: 2056 handle = little_endian_read_16(packet, 3); 2057 conn = hci_connection_for_handle(handle); 2058 if (!conn) break; 2059 if (packet[2] == 0) { 2060 if (packet[5]){ 2061 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2062 } else { 2063 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2064 } 2065 } 2066 #ifdef ENABLE_CLASSIC 2067 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2068 #endif 2069 break; 2070 2071 #ifdef ENABLE_CLASSIC 2072 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2073 handle = little_endian_read_16(packet, 3); 2074 conn = hci_connection_for_handle(handle); 2075 if (!conn) break; 2076 2077 // dedicated bonding: send result and disconnect 2078 if (conn->bonding_flags & BONDING_DEDICATED){ 2079 conn->bonding_flags &= ~BONDING_DEDICATED; 2080 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2081 conn->bonding_status = packet[2]; 2082 break; 2083 } 2084 2085 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2086 // link key sufficient for requested security 2087 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2088 break; 2089 } 2090 // not enough 2091 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2092 break; 2093 #endif 2094 2095 // HCI_EVENT_DISCONNECTION_COMPLETE 2096 // has been split, to first notify stack before shutting connection down 2097 // see end of function, too. 2098 case HCI_EVENT_DISCONNECTION_COMPLETE: 2099 if (packet[2]) break; // status != 0 2100 handle = little_endian_read_16(packet, 3); 2101 // drop outgoing ACL fragments if it is for closed connection 2102 if (hci_stack->acl_fragmentation_total_size > 0) { 2103 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2104 log_info("hci: drop fragmented ACL data for closed connection"); 2105 hci_stack->acl_fragmentation_total_size = 0; 2106 hci_stack->acl_fragmentation_pos = 0; 2107 } 2108 } 2109 2110 // re-enable advertisements for le connections if active 2111 conn = hci_connection_for_handle(handle); 2112 if (!conn) break; 2113 #ifdef ENABLE_BLE 2114 #ifdef ENABLE_LE_PERIPHERAL 2115 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 2116 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2117 } 2118 #endif 2119 #endif 2120 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2121 break; 2122 2123 case HCI_EVENT_HARDWARE_ERROR: 2124 log_error("Hardware Error: 0x%02x", packet[2]); 2125 if (hci_stack->hardware_error_callback){ 2126 (*hci_stack->hardware_error_callback)(packet[2]); 2127 } else { 2128 // if no special requests, just reboot stack 2129 hci_power_control_off(); 2130 hci_power_control_on(); 2131 } 2132 break; 2133 2134 #ifdef ENABLE_CLASSIC 2135 case HCI_EVENT_ROLE_CHANGE: 2136 if (packet[2]) break; // status != 0 2137 reverse_bd_addr(&packet[3], addr); 2138 addr_type = BD_ADDR_TYPE_CLASSIC; 2139 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2140 if (!conn) break; 2141 conn->role = packet[9]; 2142 break; 2143 #endif 2144 2145 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2146 // release packet buffer only for asynchronous transport and if there are not further fragements 2147 if (hci_transport_synchronous()) { 2148 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2149 return; // instead of break: to avoid re-entering hci_run() 2150 } 2151 if (hci_stack->acl_fragmentation_total_size) break; 2152 hci_release_packet_buffer(); 2153 2154 // L2CAP receives this event via the hci_emit_event below 2155 2156 #ifdef ENABLE_CLASSIC 2157 // For SCO, we do the can_send_now_check here 2158 hci_notify_if_sco_can_send_now(); 2159 #endif 2160 break; 2161 2162 #ifdef ENABLE_CLASSIC 2163 case HCI_EVENT_SCO_CAN_SEND_NOW: 2164 // For SCO, we do the can_send_now_check here 2165 hci_notify_if_sco_can_send_now(); 2166 return; 2167 2168 // explode inquriy results for easier consumption 2169 case HCI_EVENT_INQUIRY_RESULT: 2170 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2171 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2172 gap_inquiry_explode(packet); 2173 break; 2174 #endif 2175 2176 #ifdef ENABLE_BLE 2177 case HCI_EVENT_LE_META: 2178 switch (packet[2]){ 2179 #ifdef ENABLE_LE_CENTRAL 2180 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2181 // log_info("advertising report received"); 2182 if (hci_stack->le_scanning_state != LE_SCANNING) break; 2183 le_handle_advertisement_report(packet, size); 2184 break; 2185 #endif 2186 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2187 // Connection management 2188 reverse_bd_addr(&packet[8], addr); 2189 addr_type = (bd_addr_type_t)packet[7]; 2190 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2191 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2192 2193 #ifdef ENABLE_LE_CENTRAL 2194 // if auto-connect, remove from whitelist in both roles 2195 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2196 hci_remove_from_whitelist(addr_type, addr); 2197 } 2198 // handle error: error is reported only to the initiator -> outgoing connection 2199 if (packet[3]){ 2200 2201 // handle cancelled outgoing connection 2202 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2203 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2204 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2205 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2206 conn = gap_get_outgoing_connection(); 2207 } 2208 2209 // outgoing connection establishment is done 2210 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2211 // remove entry 2212 if (conn){ 2213 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2214 btstack_memory_hci_connection_free( conn ); 2215 } 2216 break; 2217 } 2218 #endif 2219 // on success, both hosts receive connection complete event 2220 if (packet[6] == HCI_ROLE_MASTER){ 2221 #ifdef ENABLE_LE_CENTRAL 2222 // if we're master, it was an outgoing connection and we're done with it 2223 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2224 #endif 2225 } else { 2226 #ifdef ENABLE_LE_PERIPHERAL 2227 // if we're slave, it was an incoming connection, advertisements have stopped 2228 hci_stack->le_advertisements_active = 0; 2229 // try to re-enable them 2230 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2231 #endif 2232 } 2233 // LE connections are auto-accepted, so just create a connection if there isn't one already 2234 if (!conn){ 2235 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2236 } 2237 // no memory, sorry. 2238 if (!conn){ 2239 break; 2240 } 2241 2242 conn->state = OPEN; 2243 conn->role = packet[6]; 2244 conn->con_handle = little_endian_read_16(packet, 4); 2245 2246 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2247 2248 // restart timer 2249 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2250 // btstack_run_loop_add_timer(&conn->timeout); 2251 2252 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2253 2254 hci_emit_nr_connections_changed(); 2255 break; 2256 2257 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2258 2259 default: 2260 break; 2261 } 2262 break; 2263 #endif 2264 default: 2265 break; 2266 } 2267 2268 // handle BT initialization 2269 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2270 hci_initializing_event_handler(packet, size); 2271 } 2272 2273 // help with BT sleep 2274 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2275 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2276 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2277 hci_initializing_next_state(); 2278 } 2279 2280 // notify upper stack 2281 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2282 2283 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2284 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2285 if (!packet[2]){ 2286 handle = little_endian_read_16(packet, 3); 2287 hci_connection_t * aConn = hci_connection_for_handle(handle); 2288 if (aConn) { 2289 uint8_t status = aConn->bonding_status; 2290 uint16_t flags = aConn->bonding_flags; 2291 bd_addr_t bd_address; 2292 memcpy(&bd_address, aConn->address, 6); 2293 hci_shutdown_connection(aConn); 2294 // connection struct is gone, don't access anymore 2295 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2296 hci_emit_dedicated_bonding_result(bd_address, status); 2297 } 2298 } 2299 } 2300 } 2301 2302 // execute main loop 2303 hci_run(); 2304 } 2305 2306 #ifdef ENABLE_CLASSIC 2307 static void sco_handler(uint8_t * packet, uint16_t size){ 2308 if (!hci_stack->sco_packet_handler) return; 2309 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2310 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2311 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2312 hci_connection_t *conn = hci_connection_for_handle(con_handle); 2313 if (conn){ 2314 conn->num_packets_completed++; 2315 hci_stack->host_completed_packets = 1; 2316 hci_run(); 2317 } 2318 #endif 2319 } 2320 #endif 2321 2322 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2323 hci_dump_packet(packet_type, 1, packet, size); 2324 switch (packet_type) { 2325 case HCI_EVENT_PACKET: 2326 event_handler(packet, size); 2327 break; 2328 case HCI_ACL_DATA_PACKET: 2329 acl_handler(packet, size); 2330 break; 2331 #ifdef ENABLE_CLASSIC 2332 case HCI_SCO_DATA_PACKET: 2333 sco_handler(packet, size); 2334 break; 2335 #endif 2336 default: 2337 break; 2338 } 2339 } 2340 2341 /** 2342 * @brief Add event packet handler. 2343 */ 2344 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2345 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2346 } 2347 2348 2349 /** Register HCI packet handlers */ 2350 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2351 hci_stack->acl_packet_handler = handler; 2352 } 2353 2354 #ifdef ENABLE_CLASSIC 2355 /** 2356 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2357 */ 2358 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2359 hci_stack->sco_packet_handler = handler; 2360 } 2361 #endif 2362 2363 static void hci_state_reset(void){ 2364 // no connections yet 2365 hci_stack->connections = NULL; 2366 2367 // keep discoverable/connectable as this has been requested by the client(s) 2368 // hci_stack->discoverable = 0; 2369 // hci_stack->connectable = 0; 2370 // hci_stack->bondable = 1; 2371 // hci_stack->own_addr_type = 0; 2372 2373 // buffer is free 2374 hci_stack->hci_packet_buffer_reserved = 0; 2375 2376 // no pending cmds 2377 hci_stack->decline_reason = 0; 2378 hci_stack->new_scan_enable_value = 0xff; 2379 2380 // LE 2381 #ifdef ENABLE_BLE 2382 memset(hci_stack->le_random_address, 0, 6); 2383 hci_stack->le_random_address_set = 0; 2384 #endif 2385 #ifdef ENABLE_LE_CENTRAL 2386 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2387 hci_stack->le_scan_type = 0xff; 2388 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2389 hci_stack->le_whitelist = 0; 2390 hci_stack->le_whitelist_capacity = 0; 2391 #endif 2392 } 2393 2394 #ifdef ENABLE_CLASSIC 2395 /** 2396 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2397 */ 2398 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2399 // store and open remote device db 2400 hci_stack->link_key_db = link_key_db; 2401 if (hci_stack->link_key_db) { 2402 hci_stack->link_key_db->open(); 2403 } 2404 } 2405 #endif 2406 2407 void hci_init(const hci_transport_t *transport, const void *config){ 2408 2409 #ifdef HAVE_MALLOC 2410 if (!hci_stack) { 2411 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2412 } 2413 #else 2414 hci_stack = &hci_stack_static; 2415 #endif 2416 memset(hci_stack, 0, sizeof(hci_stack_t)); 2417 2418 // reference to use transport layer implementation 2419 hci_stack->hci_transport = transport; 2420 2421 // reference to used config 2422 hci_stack->config = config; 2423 2424 // setup pointer for outgoing packet buffer 2425 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2426 2427 // max acl payload size defined in config.h 2428 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2429 2430 // register packet handlers with transport 2431 transport->register_packet_handler(&packet_handler); 2432 2433 hci_stack->state = HCI_STATE_OFF; 2434 2435 // class of device 2436 hci_stack->class_of_device = 0x007a020c; // Smartphone 2437 2438 // bondable by default 2439 hci_stack->bondable = 1; 2440 2441 #ifdef ENABLE_CLASSIC 2442 // classic name 2443 hci_stack->local_name = default_classic_name; 2444 2445 // Master slave policy 2446 hci_stack->master_slave_policy = 1; 2447 #endif 2448 2449 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2450 hci_stack->ssp_enable = 1; 2451 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2452 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2453 hci_stack->ssp_auto_accept = 1; 2454 2455 // voice setting - signed 16 bit pcm data with CVSD over the air 2456 hci_stack->sco_voice_setting = 0x60; 2457 2458 #ifdef ENABLE_LE_CENTRAL 2459 // connection parameter to use for outgoing connections 2460 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2461 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2462 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2463 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2464 hci_stack->le_connection_latency = 4; // 4 2465 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2466 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2467 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2468 #endif 2469 2470 // connection parameter range used to answer connection parameter update requests in l2cap 2471 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2472 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2473 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2474 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2475 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2476 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2477 2478 hci_state_reset(); 2479 } 2480 2481 /** 2482 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2483 */ 2484 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2485 hci_stack->chipset = chipset_driver; 2486 2487 // reset chipset driver - init is also called on power_up 2488 if (hci_stack->chipset && hci_stack->chipset->init){ 2489 hci_stack->chipset->init(hci_stack->config); 2490 } 2491 } 2492 2493 /** 2494 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2495 */ 2496 void hci_set_control(const btstack_control_t *hardware_control){ 2497 // references to used control implementation 2498 hci_stack->control = hardware_control; 2499 // init with transport config 2500 hardware_control->init(hci_stack->config); 2501 } 2502 2503 void hci_close(void){ 2504 // close remote device db 2505 if (hci_stack->link_key_db) { 2506 hci_stack->link_key_db->close(); 2507 } 2508 2509 btstack_linked_list_iterator_t lit; 2510 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2511 while (btstack_linked_list_iterator_has_next(&lit)){ 2512 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2513 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2514 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2515 hci_shutdown_connection(connection); 2516 } 2517 2518 hci_power_control(HCI_POWER_OFF); 2519 2520 #ifdef HAVE_MALLOC 2521 free(hci_stack); 2522 #endif 2523 hci_stack = NULL; 2524 } 2525 2526 #ifdef ENABLE_CLASSIC 2527 void gap_set_class_of_device(uint32_t class_of_device){ 2528 hci_stack->class_of_device = class_of_device; 2529 } 2530 2531 void hci_disable_l2cap_timeout_check(void){ 2532 disable_l2cap_timeouts = 1; 2533 } 2534 #endif 2535 2536 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2537 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2538 void hci_set_bd_addr(bd_addr_t addr){ 2539 memcpy(hci_stack->custom_bd_addr, addr, 6); 2540 hci_stack->custom_bd_addr_set = 1; 2541 } 2542 #endif 2543 2544 // State-Module-Driver overview 2545 // state module low-level 2546 // HCI_STATE_OFF off close 2547 // HCI_STATE_INITIALIZING, on open 2548 // HCI_STATE_WORKING, on open 2549 // HCI_STATE_HALTING, on open 2550 // HCI_STATE_SLEEPING, off/sleep close 2551 // HCI_STATE_FALLING_ASLEEP on open 2552 2553 static int hci_power_control_on(void){ 2554 2555 // power on 2556 int err = 0; 2557 if (hci_stack->control && hci_stack->control->on){ 2558 err = (*hci_stack->control->on)(); 2559 } 2560 if (err){ 2561 log_error( "POWER_ON failed"); 2562 hci_emit_hci_open_failed(); 2563 return err; 2564 } 2565 2566 // int chipset driver 2567 if (hci_stack->chipset && hci_stack->chipset->init){ 2568 hci_stack->chipset->init(hci_stack->config); 2569 } 2570 2571 // init transport 2572 if (hci_stack->hci_transport->init){ 2573 hci_stack->hci_transport->init(hci_stack->config); 2574 } 2575 2576 // open transport 2577 err = hci_stack->hci_transport->open(); 2578 if (err){ 2579 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2580 if (hci_stack->control && hci_stack->control->off){ 2581 (*hci_stack->control->off)(); 2582 } 2583 hci_emit_hci_open_failed(); 2584 return err; 2585 } 2586 return 0; 2587 } 2588 2589 static void hci_power_control_off(void){ 2590 2591 log_info("hci_power_control_off"); 2592 2593 // close low-level device 2594 hci_stack->hci_transport->close(); 2595 2596 log_info("hci_power_control_off - hci_transport closed"); 2597 2598 // power off 2599 if (hci_stack->control && hci_stack->control->off){ 2600 (*hci_stack->control->off)(); 2601 } 2602 2603 log_info("hci_power_control_off - control closed"); 2604 2605 hci_stack->state = HCI_STATE_OFF; 2606 } 2607 2608 static void hci_power_control_sleep(void){ 2609 2610 log_info("hci_power_control_sleep"); 2611 2612 #if 0 2613 // don't close serial port during sleep 2614 2615 // close low-level device 2616 hci_stack->hci_transport->close(hci_stack->config); 2617 #endif 2618 2619 // sleep mode 2620 if (hci_stack->control && hci_stack->control->sleep){ 2621 (*hci_stack->control->sleep)(); 2622 } 2623 2624 hci_stack->state = HCI_STATE_SLEEPING; 2625 } 2626 2627 static int hci_power_control_wake(void){ 2628 2629 log_info("hci_power_control_wake"); 2630 2631 // wake on 2632 if (hci_stack->control && hci_stack->control->wake){ 2633 (*hci_stack->control->wake)(); 2634 } 2635 2636 #if 0 2637 // open low-level device 2638 int err = hci_stack->hci_transport->open(hci_stack->config); 2639 if (err){ 2640 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2641 if (hci_stack->control && hci_stack->control->off){ 2642 (*hci_stack->control->off)(); 2643 } 2644 hci_emit_hci_open_failed(); 2645 return err; 2646 } 2647 #endif 2648 2649 return 0; 2650 } 2651 2652 static void hci_power_transition_to_initializing(void){ 2653 // set up state machine 2654 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2655 hci_stack->hci_packet_buffer_reserved = 0; 2656 hci_stack->state = HCI_STATE_INITIALIZING; 2657 hci_stack->substate = HCI_INIT_SEND_RESET; 2658 } 2659 2660 int hci_power_control(HCI_POWER_MODE power_mode){ 2661 2662 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2663 2664 int err = 0; 2665 switch (hci_stack->state){ 2666 2667 case HCI_STATE_OFF: 2668 switch (power_mode){ 2669 case HCI_POWER_ON: 2670 err = hci_power_control_on(); 2671 if (err) { 2672 log_error("hci_power_control_on() error %d", err); 2673 return err; 2674 } 2675 hci_power_transition_to_initializing(); 2676 break; 2677 case HCI_POWER_OFF: 2678 // do nothing 2679 break; 2680 case HCI_POWER_SLEEP: 2681 // do nothing (with SLEEP == OFF) 2682 break; 2683 } 2684 break; 2685 2686 case HCI_STATE_INITIALIZING: 2687 switch (power_mode){ 2688 case HCI_POWER_ON: 2689 // do nothing 2690 break; 2691 case HCI_POWER_OFF: 2692 // no connections yet, just turn it off 2693 hci_power_control_off(); 2694 break; 2695 case HCI_POWER_SLEEP: 2696 // no connections yet, just turn it off 2697 hci_power_control_sleep(); 2698 break; 2699 } 2700 break; 2701 2702 case HCI_STATE_WORKING: 2703 switch (power_mode){ 2704 case HCI_POWER_ON: 2705 // do nothing 2706 break; 2707 case HCI_POWER_OFF: 2708 // see hci_run 2709 hci_stack->state = HCI_STATE_HALTING; 2710 break; 2711 case HCI_POWER_SLEEP: 2712 // see hci_run 2713 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2714 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2715 break; 2716 } 2717 break; 2718 2719 case HCI_STATE_HALTING: 2720 switch (power_mode){ 2721 case HCI_POWER_ON: 2722 hci_power_transition_to_initializing(); 2723 break; 2724 case HCI_POWER_OFF: 2725 // do nothing 2726 break; 2727 case HCI_POWER_SLEEP: 2728 // see hci_run 2729 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2730 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2731 break; 2732 } 2733 break; 2734 2735 case HCI_STATE_FALLING_ASLEEP: 2736 switch (power_mode){ 2737 case HCI_POWER_ON: 2738 2739 #ifdef HAVE_PLATFORM_IPHONE_OS 2740 // nothing to do, if H4 supports power management 2741 if (btstack_control_iphone_power_management_enabled()){ 2742 hci_stack->state = HCI_STATE_INITIALIZING; 2743 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2744 break; 2745 } 2746 #endif 2747 hci_power_transition_to_initializing(); 2748 break; 2749 case HCI_POWER_OFF: 2750 // see hci_run 2751 hci_stack->state = HCI_STATE_HALTING; 2752 break; 2753 case HCI_POWER_SLEEP: 2754 // do nothing 2755 break; 2756 } 2757 break; 2758 2759 case HCI_STATE_SLEEPING: 2760 switch (power_mode){ 2761 case HCI_POWER_ON: 2762 2763 #ifdef HAVE_PLATFORM_IPHONE_OS 2764 // nothing to do, if H4 supports power management 2765 if (btstack_control_iphone_power_management_enabled()){ 2766 hci_stack->state = HCI_STATE_INITIALIZING; 2767 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2768 hci_update_scan_enable(); 2769 break; 2770 } 2771 #endif 2772 err = hci_power_control_wake(); 2773 if (err) return err; 2774 hci_power_transition_to_initializing(); 2775 break; 2776 case HCI_POWER_OFF: 2777 hci_stack->state = HCI_STATE_HALTING; 2778 break; 2779 case HCI_POWER_SLEEP: 2780 // do nothing 2781 break; 2782 } 2783 break; 2784 } 2785 2786 // create internal event 2787 hci_emit_state(); 2788 2789 // trigger next/first action 2790 hci_run(); 2791 2792 return 0; 2793 } 2794 2795 2796 #ifdef ENABLE_CLASSIC 2797 2798 static void hci_update_scan_enable(void){ 2799 // 2 = page scan, 1 = inq scan 2800 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2801 hci_run(); 2802 } 2803 2804 void gap_discoverable_control(uint8_t enable){ 2805 if (enable) enable = 1; // normalize argument 2806 2807 if (hci_stack->discoverable == enable){ 2808 hci_emit_discoverable_enabled(hci_stack->discoverable); 2809 return; 2810 } 2811 2812 hci_stack->discoverable = enable; 2813 hci_update_scan_enable(); 2814 } 2815 2816 void gap_connectable_control(uint8_t enable){ 2817 if (enable) enable = 1; // normalize argument 2818 2819 // don't emit event 2820 if (hci_stack->connectable == enable) return; 2821 2822 hci_stack->connectable = enable; 2823 hci_update_scan_enable(); 2824 } 2825 #endif 2826 2827 void gap_local_bd_addr(bd_addr_t address_buffer){ 2828 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2829 } 2830 2831 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2832 static void hci_host_num_completed_packets(void){ 2833 2834 // create packet manually as arrays are not supported and num_commands should not get reduced 2835 hci_reserve_packet_buffer(); 2836 uint8_t * packet = hci_get_outgoing_packet_buffer(); 2837 2838 uint16_t size = 0; 2839 uint16_t num_handles = 0; 2840 packet[size++] = 0x35; 2841 packet[size++] = 0x0c; 2842 size++; // skip param len 2843 size++; // skip num handles 2844 2845 // add { handle, packets } entries 2846 btstack_linked_item_t * it; 2847 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2848 hci_connection_t * connection = (hci_connection_t *) it; 2849 if (connection->num_packets_completed){ 2850 little_endian_store_16(packet, size, connection->con_handle); 2851 size += 2; 2852 little_endian_store_16(packet, size, connection->num_packets_completed); 2853 size += 2; 2854 // 2855 num_handles++; 2856 connection->num_packets_completed = 0; 2857 } 2858 } 2859 2860 packet[2] = size - 3; 2861 packet[3] = num_handles; 2862 2863 hci_stack->host_completed_packets = 0; 2864 2865 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2866 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2867 2868 // release packet buffer for synchronous transport implementations 2869 if (hci_transport_synchronous()){ 2870 hci_stack->hci_packet_buffer_reserved = 0; 2871 } 2872 } 2873 #endif 2874 2875 static void hci_run(void){ 2876 2877 // log_info("hci_run: entered"); 2878 btstack_linked_item_t * it; 2879 2880 // send continuation fragments first, as they block the prepared packet buffer 2881 if (hci_stack->acl_fragmentation_total_size > 0) { 2882 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2883 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2884 if (connection) { 2885 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2886 hci_send_acl_packet_fragments(connection); 2887 return; 2888 } 2889 } else { 2890 // connection gone -> discard further fragments 2891 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2892 hci_stack->acl_fragmentation_total_size = 0; 2893 hci_stack->acl_fragmentation_pos = 0; 2894 } 2895 } 2896 2897 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2898 // send host num completed packets next as they don't require num_cmd_packets > 0 2899 if (!hci_can_send_comand_packet_transport()) return; 2900 if (hci_stack->host_completed_packets){ 2901 hci_host_num_completed_packets(); 2902 return; 2903 } 2904 #endif 2905 2906 if (!hci_can_send_command_packet_now()) return; 2907 2908 // global/non-connection oriented commands 2909 2910 #ifdef ENABLE_CLASSIC 2911 // decline incoming connections 2912 if (hci_stack->decline_reason){ 2913 uint8_t reason = hci_stack->decline_reason; 2914 hci_stack->decline_reason = 0; 2915 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2916 return; 2917 } 2918 // send scan enable 2919 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2920 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2921 hci_stack->new_scan_enable_value = 0xff; 2922 return; 2923 } 2924 // start/stop inquiry 2925 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 2926 uint8_t duration = hci_stack->inquiry_state; 2927 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2928 hci_send_cmd(&hci_inquiry, HCI_INQUIRY_LAP, duration, 0); 2929 return; 2930 } 2931 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 2932 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 2933 hci_send_cmd(&hci_inquiry_cancel); 2934 return; 2935 } 2936 // remote name request 2937 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 2938 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 2939 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 2940 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 2941 return; 2942 } 2943 // pairing 2944 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 2945 uint8_t state = hci_stack->gap_pairing_state; 2946 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2947 switch (state){ 2948 case GAP_PAIRING_STATE_SEND_PIN: 2949 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, strlen(hci_stack->gap_pairing_pin), hci_stack->gap_pairing_pin); 2950 break; 2951 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 2952 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 2953 break; 2954 case GAP_PAIRING_STATE_SEND_PASSKEY: 2955 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_passkey); 2956 break; 2957 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 2958 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 2959 break; 2960 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 2961 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 2962 break; 2963 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 2964 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 2965 break; 2966 default: 2967 break; 2968 } 2969 return; 2970 } 2971 #endif 2972 2973 #ifdef ENABLE_BLE 2974 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 2975 if ((hci_stack->state == HCI_STATE_WORKING) 2976 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 2977 2978 #ifdef ENABLE_LE_CENTRAL 2979 // handle le scan 2980 switch(hci_stack->le_scanning_state){ 2981 case LE_START_SCAN: 2982 hci_stack->le_scanning_state = LE_SCANNING; 2983 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2984 return; 2985 2986 case LE_STOP_SCAN: 2987 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2988 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2989 return; 2990 default: 2991 break; 2992 } 2993 if (hci_stack->le_scan_type != 0xff){ 2994 // defaults: active scanning, accept all advertisement packets 2995 int scan_type = hci_stack->le_scan_type; 2996 hci_stack->le_scan_type = 0xff; 2997 hci_send_cmd(&hci_le_set_scan_parameters, scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->le_own_addr_type, 0); 2998 return; 2999 } 3000 #endif 3001 #ifdef ENABLE_LE_PERIPHERAL 3002 // le advertisement control 3003 if (hci_stack->le_advertisements_todo){ 3004 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3005 } 3006 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3007 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3008 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3009 return; 3010 } 3011 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3012 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3013 hci_send_cmd(&hci_le_set_advertising_parameters, 3014 hci_stack->le_advertisements_interval_min, 3015 hci_stack->le_advertisements_interval_max, 3016 hci_stack->le_advertisements_type, 3017 hci_stack->le_own_addr_type, 3018 hci_stack->le_advertisements_direct_address_type, 3019 hci_stack->le_advertisements_direct_address, 3020 hci_stack->le_advertisements_channel_map, 3021 hci_stack->le_advertisements_filter_policy); 3022 return; 3023 } 3024 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3025 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3026 uint8_t adv_data_clean[31]; 3027 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3028 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 3029 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3030 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3031 return; 3032 } 3033 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3034 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3035 uint8_t scan_data_clean[31]; 3036 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3037 memcpy(scan_data_clean, hci_stack->le_scan_response_data, hci_stack->le_scan_response_data_len); 3038 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3039 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, hci_stack->le_scan_response_data); 3040 return; 3041 } 3042 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3043 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3044 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3045 return; 3046 } 3047 #endif 3048 3049 #ifdef ENABLE_LE_CENTRAL 3050 // 3051 // LE Whitelist Management 3052 // 3053 3054 // check if whitelist needs modification 3055 btstack_linked_list_iterator_t lit; 3056 int modification_pending = 0; 3057 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3058 while (btstack_linked_list_iterator_has_next(&lit)){ 3059 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3060 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3061 modification_pending = 1; 3062 break; 3063 } 3064 } 3065 3066 if (modification_pending){ 3067 // stop connnecting if modification pending 3068 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3069 hci_send_cmd(&hci_le_create_connection_cancel); 3070 return; 3071 } 3072 3073 // add/remove entries 3074 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3075 while (btstack_linked_list_iterator_has_next(&lit)){ 3076 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3077 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3078 entry->state = LE_WHITELIST_ON_CONTROLLER; 3079 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3080 return; 3081 3082 } 3083 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3084 bd_addr_t address; 3085 bd_addr_type_t address_type = entry->address_type; 3086 memcpy(address, entry->address, 6); 3087 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3088 btstack_memory_whitelist_entry_free(entry); 3089 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3090 return; 3091 } 3092 } 3093 } 3094 3095 // start connecting 3096 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3097 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3098 bd_addr_t null_addr; 3099 memset(null_addr, 0, 6); 3100 hci_send_cmd(&hci_le_create_connection, 3101 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3102 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3103 1, // use whitelist 3104 0, // peer address type 3105 null_addr, // peer bd addr 3106 hci_stack->le_own_addr_type, // our addr type: 3107 hci_stack->le_connection_interval_min, // conn interval min 3108 hci_stack->le_connection_interval_max, // conn interval max 3109 hci_stack->le_connection_latency, // conn latency 3110 hci_stack->le_supervision_timeout, // conn latency 3111 hci_stack->le_minimum_ce_length, // min ce length 3112 hci_stack->le_maximum_ce_length // max ce length 3113 ); 3114 return; 3115 } 3116 #endif 3117 } 3118 #endif 3119 3120 // send pending HCI commands 3121 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3122 hci_connection_t * connection = (hci_connection_t *) it; 3123 3124 switch(connection->state){ 3125 case SEND_CREATE_CONNECTION: 3126 switch(connection->address_type){ 3127 #ifdef ENABLE_CLASSIC 3128 case BD_ADDR_TYPE_CLASSIC: 3129 log_info("sending hci_create_connection"); 3130 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3131 break; 3132 #endif 3133 default: 3134 #ifdef ENABLE_BLE 3135 #ifdef ENABLE_LE_CENTRAL 3136 log_info("sending hci_le_create_connection"); 3137 hci_send_cmd(&hci_le_create_connection, 3138 hci_stack->le_connection_scan_interval, // conn scan interval 3139 hci_stack->le_connection_scan_window, // conn scan windows 3140 0, // don't use whitelist 3141 connection->address_type, // peer address type 3142 connection->address, // peer bd addr 3143 hci_stack->le_own_addr_type, // our addr type: 3144 hci_stack->le_connection_interval_min, // conn interval min 3145 hci_stack->le_connection_interval_max, // conn interval max 3146 hci_stack->le_connection_latency, // conn latency 3147 hci_stack->le_supervision_timeout, // conn latency 3148 hci_stack->le_minimum_ce_length, // min ce length 3149 hci_stack->le_maximum_ce_length // max ce length 3150 ); 3151 connection->state = SENT_CREATE_CONNECTION; 3152 #endif 3153 #endif 3154 break; 3155 } 3156 return; 3157 3158 #ifdef ENABLE_CLASSIC 3159 case RECEIVED_CONNECTION_REQUEST: 3160 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3161 connection->state = ACCEPTED_CONNECTION_REQUEST; 3162 connection->role = HCI_ROLE_SLAVE; 3163 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3164 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3165 } 3166 return; 3167 #endif 3168 3169 #ifdef ENABLE_BLE 3170 #ifdef ENABLE_LE_CENTRAL 3171 case SEND_CANCEL_CONNECTION: 3172 connection->state = SENT_CANCEL_CONNECTION; 3173 hci_send_cmd(&hci_le_create_connection_cancel); 3174 return; 3175 #endif 3176 #endif 3177 case SEND_DISCONNECT: 3178 connection->state = SENT_DISCONNECT; 3179 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3180 return; 3181 3182 default: 3183 break; 3184 } 3185 3186 #ifdef ENABLE_CLASSIC 3187 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3188 log_info("responding to link key request"); 3189 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3190 link_key_t link_key; 3191 link_key_type_t link_key_type; 3192 if ( hci_stack->link_key_db 3193 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3194 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3195 connection->link_key_type = link_key_type; 3196 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3197 } else { 3198 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3199 } 3200 return; 3201 } 3202 3203 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3204 log_info("denying to pin request"); 3205 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3206 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3207 return; 3208 } 3209 3210 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3211 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3212 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3213 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3214 // tweak authentication requirements 3215 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3216 if (connection->bonding_flags & BONDING_DEDICATED){ 3217 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3218 } 3219 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3220 authreq |= 1; 3221 } 3222 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3223 } else { 3224 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3225 } 3226 return; 3227 } 3228 3229 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3230 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3231 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3232 return; 3233 } 3234 3235 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3236 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3237 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3238 return; 3239 } 3240 3241 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3242 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3243 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3244 return; 3245 } 3246 3247 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3248 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3249 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3250 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3251 return; 3252 } 3253 3254 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3255 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3256 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3257 return; 3258 } 3259 3260 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3261 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3262 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3263 return; 3264 } 3265 #endif 3266 3267 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3268 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3269 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3270 return; 3271 } 3272 3273 #ifdef ENABLE_BLE 3274 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 3275 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3276 3277 uint16_t connection_interval_min = connection->le_conn_interval_min; 3278 connection->le_conn_interval_min = 0; 3279 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 3280 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3281 0x0000, 0xffff); 3282 } 3283 #endif 3284 } 3285 3286 hci_connection_t * connection; 3287 switch (hci_stack->state){ 3288 case HCI_STATE_INITIALIZING: 3289 hci_initializing_run(); 3290 break; 3291 3292 case HCI_STATE_HALTING: 3293 3294 log_info("HCI_STATE_HALTING"); 3295 3296 // free whitelist entries 3297 #ifdef ENABLE_BLE 3298 #ifdef ENABLE_LE_CENTRAL 3299 { 3300 btstack_linked_list_iterator_t lit; 3301 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3302 while (btstack_linked_list_iterator_has_next(&lit)){ 3303 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3304 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3305 btstack_memory_whitelist_entry_free(entry); 3306 } 3307 } 3308 #endif 3309 #endif 3310 // close all open connections 3311 connection = (hci_connection_t *) hci_stack->connections; 3312 if (connection){ 3313 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3314 if (!hci_can_send_command_packet_now()) return; 3315 3316 // check state 3317 if (connection->state == SENT_DISCONNECT) return; 3318 connection->state = SENT_DISCONNECT; 3319 3320 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3321 3322 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3323 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3324 3325 // ... which would be ignored anyway as we shutdown (free) the connection now 3326 hci_shutdown_connection(connection); 3327 3328 // finally, send the disconnect command 3329 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3330 return; 3331 } 3332 log_info("HCI_STATE_HALTING, calling off"); 3333 3334 // switch mode 3335 hci_power_control_off(); 3336 3337 log_info("HCI_STATE_HALTING, emitting state"); 3338 hci_emit_state(); 3339 log_info("HCI_STATE_HALTING, done"); 3340 break; 3341 3342 case HCI_STATE_FALLING_ASLEEP: 3343 switch(hci_stack->substate) { 3344 case HCI_FALLING_ASLEEP_DISCONNECT: 3345 log_info("HCI_STATE_FALLING_ASLEEP"); 3346 // close all open connections 3347 connection = (hci_connection_t *) hci_stack->connections; 3348 3349 #ifdef HAVE_PLATFORM_IPHONE_OS 3350 // don't close connections, if H4 supports power management 3351 if (btstack_control_iphone_power_management_enabled()){ 3352 connection = NULL; 3353 } 3354 #endif 3355 if (connection){ 3356 3357 // send disconnect 3358 if (!hci_can_send_command_packet_now()) return; 3359 3360 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3361 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3362 3363 // send disconnected event right away - causes higher layer connections to get closed, too. 3364 hci_shutdown_connection(connection); 3365 return; 3366 } 3367 3368 if (hci_classic_supported()){ 3369 // disable page and inquiry scan 3370 if (!hci_can_send_command_packet_now()) return; 3371 3372 log_info("HCI_STATE_HALTING, disabling inq scans"); 3373 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3374 3375 // continue in next sub state 3376 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3377 break; 3378 } 3379 // no break - fall through for ble-only chips 3380 3381 case HCI_FALLING_ASLEEP_COMPLETE: 3382 log_info("HCI_STATE_HALTING, calling sleep"); 3383 #ifdef HAVE_PLATFORM_IPHONE_OS 3384 // don't actually go to sleep, if H4 supports power management 3385 if (btstack_control_iphone_power_management_enabled()){ 3386 // SLEEP MODE reached 3387 hci_stack->state = HCI_STATE_SLEEPING; 3388 hci_emit_state(); 3389 break; 3390 } 3391 #endif 3392 // switch mode 3393 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3394 hci_emit_state(); 3395 break; 3396 3397 default: 3398 break; 3399 } 3400 break; 3401 3402 default: 3403 break; 3404 } 3405 } 3406 3407 int hci_send_cmd_packet(uint8_t *packet, int size){ 3408 // house-keeping 3409 3410 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3411 hci_stack->loopback_mode = packet[3]; 3412 } 3413 3414 #ifdef ENABLE_CLASSIC 3415 bd_addr_t addr; 3416 hci_connection_t * conn; 3417 3418 // create_connection? 3419 if (IS_COMMAND(packet, hci_create_connection)){ 3420 reverse_bd_addr(&packet[3], addr); 3421 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3422 3423 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3424 if (!conn){ 3425 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3426 if (!conn){ 3427 // notify client that alloc failed 3428 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3429 return 0; // don't sent packet to controller 3430 } 3431 conn->state = SEND_CREATE_CONNECTION; 3432 } 3433 log_info("conn state %u", conn->state); 3434 switch (conn->state){ 3435 // if connection active exists 3436 case OPEN: 3437 // and OPEN, emit connection complete command, don't send to controller 3438 hci_emit_connection_complete(addr, conn->con_handle, 0); 3439 return 0; 3440 case SEND_CREATE_CONNECTION: 3441 // connection created by hci, e.g. dedicated bonding 3442 break; 3443 default: 3444 // otherwise, just ignore as it is already in the open process 3445 return 0; 3446 } 3447 conn->state = SENT_CREATE_CONNECTION; 3448 } 3449 3450 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3451 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3452 } 3453 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3454 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3455 } 3456 3457 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3458 if (hci_stack->link_key_db){ 3459 reverse_bd_addr(&packet[3], addr); 3460 hci_stack->link_key_db->delete_link_key(addr); 3461 } 3462 } 3463 3464 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3465 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3466 reverse_bd_addr(&packet[3], addr); 3467 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3468 if (conn){ 3469 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3470 } 3471 } 3472 3473 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3474 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3475 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3476 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3477 reverse_bd_addr(&packet[3], addr); 3478 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3479 if (conn){ 3480 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3481 } 3482 } 3483 3484 #ifdef ENABLE_SCO_OVER_HCI 3485 // setup_synchronous_connection? Voice setting at offset 22 3486 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3487 // TODO: compare to current setting if sco connection already active 3488 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3489 } 3490 // accept_synchronus_connection? Voice setting at offset 18 3491 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3492 // TODO: compare to current setting if sco connection already active 3493 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3494 } 3495 #endif 3496 #endif 3497 3498 #ifdef ENABLE_BLE 3499 #ifdef ENABLE_LE_PERIPHERAL 3500 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3501 hci_stack->le_random_address_set = 1; 3502 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3503 } 3504 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3505 hci_stack->le_advertisements_active = packet[3]; 3506 } 3507 #endif 3508 #ifdef ENABLE_LE_CENTRAL 3509 if (IS_COMMAND(packet, hci_le_create_connection)){ 3510 // white list used? 3511 uint8_t initiator_filter_policy = packet[7]; 3512 switch (initiator_filter_policy){ 3513 case 0: 3514 // whitelist not used 3515 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3516 break; 3517 case 1: 3518 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3519 break; 3520 default: 3521 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3522 break; 3523 } 3524 } 3525 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3526 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3527 } 3528 #endif 3529 #endif 3530 3531 hci_stack->num_cmd_packets--; 3532 3533 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3534 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3535 3536 // release packet buffer for synchronous transport implementations 3537 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3538 hci_stack->hci_packet_buffer_reserved = 0; 3539 } 3540 3541 return err; 3542 } 3543 3544 // disconnect because of security block 3545 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3546 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3547 if (!connection) return; 3548 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3549 } 3550 3551 3552 // Configure Secure Simple Pairing 3553 3554 #ifdef ENABLE_CLASSIC 3555 3556 // enable will enable SSP during init 3557 void gap_ssp_set_enable(int enable){ 3558 hci_stack->ssp_enable = enable; 3559 } 3560 3561 static int hci_local_ssp_activated(void){ 3562 return gap_ssp_supported() && hci_stack->ssp_enable; 3563 } 3564 3565 // if set, BTstack will respond to io capability request using authentication requirement 3566 void gap_ssp_set_io_capability(int io_capability){ 3567 hci_stack->ssp_io_capability = io_capability; 3568 } 3569 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3570 hci_stack->ssp_authentication_requirement = authentication_requirement; 3571 } 3572 3573 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3574 void gap_ssp_set_auto_accept(int auto_accept){ 3575 hci_stack->ssp_auto_accept = auto_accept; 3576 } 3577 #endif 3578 3579 // va_list part of hci_send_cmd 3580 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3581 if (!hci_can_send_command_packet_now()){ 3582 log_error("hci_send_cmd called but cannot send packet now"); 3583 return 0; 3584 } 3585 3586 // for HCI INITIALIZATION 3587 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3588 hci_stack->last_cmd_opcode = cmd->opcode; 3589 3590 hci_reserve_packet_buffer(); 3591 uint8_t * packet = hci_stack->hci_packet_buffer; 3592 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3593 return hci_send_cmd_packet(packet, size); 3594 } 3595 3596 /** 3597 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3598 */ 3599 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3600 va_list argptr; 3601 va_start(argptr, cmd); 3602 int res = hci_send_cmd_va_arg(cmd, argptr); 3603 va_end(argptr); 3604 return res; 3605 } 3606 3607 // Create various non-HCI events. 3608 // TODO: generalize, use table similar to hci_create_command 3609 3610 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3611 // dump packet 3612 if (dump) { 3613 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3614 } 3615 3616 // dispatch to all event handlers 3617 btstack_linked_list_iterator_t it; 3618 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3619 while (btstack_linked_list_iterator_has_next(&it)){ 3620 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3621 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3622 } 3623 } 3624 3625 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3626 if (!hci_stack->acl_packet_handler) return; 3627 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3628 } 3629 3630 #ifdef ENABLE_CLASSIC 3631 static void hci_notify_if_sco_can_send_now(void){ 3632 // notify SCO sender if waiting 3633 if (!hci_stack->sco_waiting_for_can_send_now) return; 3634 if (hci_can_send_sco_packet_now()){ 3635 hci_stack->sco_waiting_for_can_send_now = 0; 3636 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3637 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3638 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3639 } 3640 } 3641 3642 // parsing end emitting has been merged to reduce code size 3643 static void gap_inquiry_explode(uint8_t * packet){ 3644 uint8_t event[15+GAP_INQUIRY_MAX_NAME_LEN]; 3645 3646 uint8_t * eir_data; 3647 ad_context_t context; 3648 const uint8_t * name; 3649 uint8_t name_len; 3650 3651 int event_type = hci_event_packet_get_type(packet); 3652 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 3653 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 3654 3655 // event[1] is set at the end 3656 int i; 3657 for (i=0; i<num_responses;i++){ 3658 memset(event, 0, sizeof(event)); 3659 event[0] = GAP_EVENT_INQUIRY_RESULT; 3660 uint8_t event_size = 18; // if name is not set by EIR 3661 3662 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 3663 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 3664 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 3665 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 3666 3667 switch (event_type){ 3668 case HCI_EVENT_INQUIRY_RESULT: 3669 // 14,15,16,17 = 0, size 18 3670 break; 3671 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3672 event[14] = 1; 3673 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3674 // 16,17 = 0, size 18 3675 break; 3676 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3677 event[14] = 1; 3678 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3679 // for EIR packets, there is only one reponse in it 3680 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 3681 name = NULL; 3682 // EIR data is 240 bytes in EIR event 3683 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 3684 uint8_t data_type = ad_iterator_get_data_type(&context); 3685 uint8_t data_size = ad_iterator_get_data_len(&context); 3686 const uint8_t * data = ad_iterator_get_data(&context); 3687 // Prefer Complete Local Name over Shortend Local Name 3688 switch (data_type){ 3689 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 3690 if (name) continue; 3691 /* explicit fall-through */ 3692 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 3693 name = data; 3694 name_len = data_size; 3695 break; 3696 default: 3697 break; 3698 } 3699 } 3700 if (name){ 3701 event[16] = 1; 3702 // truncate name if needed 3703 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 3704 event[17] = len; 3705 memcpy(&event[18], name, len); 3706 event_size += len; 3707 } 3708 break; 3709 } 3710 event[1] = event_size - 2; 3711 hci_emit_event(event, event_size, 1); 3712 } 3713 } 3714 #endif 3715 3716 void hci_emit_state(void){ 3717 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3718 uint8_t event[3]; 3719 event[0] = BTSTACK_EVENT_STATE; 3720 event[1] = sizeof(event) - 2; 3721 event[2] = hci_stack->state; 3722 hci_emit_event(event, sizeof(event), 1); 3723 } 3724 3725 #ifdef ENABLE_CLASSIC 3726 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3727 uint8_t event[13]; 3728 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3729 event[1] = sizeof(event) - 2; 3730 event[2] = status; 3731 little_endian_store_16(event, 3, con_handle); 3732 reverse_bd_addr(address, &event[5]); 3733 event[11] = 1; // ACL connection 3734 event[12] = 0; // encryption disabled 3735 hci_emit_event(event, sizeof(event), 1); 3736 } 3737 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3738 if (disable_l2cap_timeouts) return; 3739 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3740 uint8_t event[4]; 3741 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3742 event[1] = sizeof(event) - 2; 3743 little_endian_store_16(event, 2, conn->con_handle); 3744 hci_emit_event(event, sizeof(event), 1); 3745 } 3746 #endif 3747 3748 #ifdef ENABLE_BLE 3749 #ifdef ENABLE_LE_CENTRAL 3750 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3751 uint8_t event[21]; 3752 event[0] = HCI_EVENT_LE_META; 3753 event[1] = sizeof(event) - 2; 3754 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3755 event[3] = status; 3756 little_endian_store_16(event, 4, con_handle); 3757 event[6] = 0; // TODO: role 3758 event[7] = address_type; 3759 reverse_bd_addr(address, &event[8]); 3760 little_endian_store_16(event, 14, 0); // interval 3761 little_endian_store_16(event, 16, 0); // latency 3762 little_endian_store_16(event, 18, 0); // supervision timeout 3763 event[20] = 0; // master clock accuracy 3764 hci_emit_event(event, sizeof(event), 1); 3765 } 3766 #endif 3767 #endif 3768 3769 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3770 uint8_t event[6]; 3771 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3772 event[1] = sizeof(event) - 2; 3773 event[2] = 0; // status = OK 3774 little_endian_store_16(event, 3, con_handle); 3775 event[5] = reason; 3776 hci_emit_event(event, sizeof(event), 1); 3777 } 3778 3779 static void hci_emit_nr_connections_changed(void){ 3780 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3781 uint8_t event[3]; 3782 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3783 event[1] = sizeof(event) - 2; 3784 event[2] = nr_hci_connections(); 3785 hci_emit_event(event, sizeof(event), 1); 3786 } 3787 3788 static void hci_emit_hci_open_failed(void){ 3789 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3790 uint8_t event[2]; 3791 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3792 event[1] = sizeof(event) - 2; 3793 hci_emit_event(event, sizeof(event), 1); 3794 } 3795 3796 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3797 log_info("hci_emit_dedicated_bonding_result %u ", status); 3798 uint8_t event[9]; 3799 int pos = 0; 3800 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3801 event[pos++] = sizeof(event) - 2; 3802 event[pos++] = status; 3803 reverse_bd_addr(address, &event[pos]); 3804 hci_emit_event(event, sizeof(event), 1); 3805 } 3806 3807 3808 #ifdef ENABLE_CLASSIC 3809 3810 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3811 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3812 uint8_t event[5]; 3813 int pos = 0; 3814 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3815 event[pos++] = sizeof(event) - 2; 3816 little_endian_store_16(event, 2, con_handle); 3817 pos += 2; 3818 event[pos++] = level; 3819 hci_emit_event(event, sizeof(event), 1); 3820 } 3821 3822 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3823 if (!connection) return LEVEL_0; 3824 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3825 return gap_security_level_for_link_key_type(connection->link_key_type); 3826 } 3827 3828 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3829 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3830 uint8_t event[3]; 3831 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3832 event[1] = sizeof(event) - 2; 3833 event[2] = enabled; 3834 hci_emit_event(event, sizeof(event), 1); 3835 } 3836 3837 #ifdef ENABLE_CLASSIC 3838 // query if remote side supports eSCO 3839 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3840 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3841 if (!connection) return 0; 3842 return connection->remote_supported_feature_eSCO; 3843 } 3844 3845 // query if remote side supports SSP 3846 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3847 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3848 if (!connection) return 0; 3849 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3850 } 3851 3852 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3853 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3854 } 3855 #endif 3856 3857 // GAP API 3858 /** 3859 * @bbrief enable/disable bonding. default is enabled 3860 * @praram enabled 3861 */ 3862 void gap_set_bondable_mode(int enable){ 3863 hci_stack->bondable = enable ? 1 : 0; 3864 } 3865 /** 3866 * @brief Get bondable mode. 3867 * @return 1 if bondable 3868 */ 3869 int gap_get_bondable_mode(void){ 3870 return hci_stack->bondable; 3871 } 3872 3873 /** 3874 * @brief map link keys to security levels 3875 */ 3876 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3877 switch (link_key_type){ 3878 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3879 return LEVEL_4; 3880 case COMBINATION_KEY: 3881 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3882 return LEVEL_3; 3883 default: 3884 return LEVEL_2; 3885 } 3886 } 3887 3888 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3889 log_info("gap_mitm_protection_required_for_security_level %u", level); 3890 return level > LEVEL_2; 3891 } 3892 3893 /** 3894 * @brief get current security level 3895 */ 3896 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3897 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3898 if (!connection) return LEVEL_0; 3899 return gap_security_level_for_connection(connection); 3900 } 3901 3902 /** 3903 * @brief request connection to device to 3904 * @result GAP_AUTHENTICATION_RESULT 3905 */ 3906 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3907 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3908 if (!connection){ 3909 hci_emit_security_level(con_handle, LEVEL_0); 3910 return; 3911 } 3912 gap_security_level_t current_level = gap_security_level(con_handle); 3913 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3914 if (current_level >= requested_level){ 3915 hci_emit_security_level(con_handle, current_level); 3916 return; 3917 } 3918 3919 connection->requested_security_level = requested_level; 3920 3921 #if 0 3922 // sending encryption request without a link key results in an error. 3923 // TODO: figure out how to use it properly 3924 3925 // would enabling ecnryption suffice (>= LEVEL_2)? 3926 if (hci_stack->link_key_db){ 3927 link_key_type_t link_key_type; 3928 link_key_t link_key; 3929 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3930 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3931 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3932 return; 3933 } 3934 } 3935 } 3936 #endif 3937 3938 // try to authenticate connection 3939 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3940 hci_run(); 3941 } 3942 3943 /** 3944 * @brief start dedicated bonding with device. disconnect after bonding 3945 * @param device 3946 * @param request MITM protection 3947 * @result GAP_DEDICATED_BONDING_COMPLETE 3948 */ 3949 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3950 3951 // create connection state machine 3952 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3953 3954 if (!connection){ 3955 return BTSTACK_MEMORY_ALLOC_FAILED; 3956 } 3957 3958 // delete linkn key 3959 gap_drop_link_key_for_bd_addr(device); 3960 3961 // configure LEVEL_2/3, dedicated bonding 3962 connection->state = SEND_CREATE_CONNECTION; 3963 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3964 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3965 connection->bonding_flags = BONDING_DEDICATED; 3966 3967 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3968 3969 // handle: connnection failure (connection complete != ok) 3970 // handle: authentication failure 3971 // handle: disconnect on done 3972 3973 hci_run(); 3974 3975 return 0; 3976 } 3977 #endif 3978 3979 void gap_set_local_name(const char * local_name){ 3980 hci_stack->local_name = local_name; 3981 } 3982 3983 3984 #ifdef ENABLE_BLE 3985 3986 #ifdef ENABLE_LE_CENTRAL 3987 void gap_start_scan(void){ 3988 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3989 hci_stack->le_scanning_state = LE_START_SCAN; 3990 hci_run(); 3991 } 3992 3993 void gap_stop_scan(void){ 3994 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3995 hci_stack->le_scanning_state = LE_STOP_SCAN; 3996 hci_run(); 3997 } 3998 3999 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4000 hci_stack->le_scan_type = scan_type; 4001 hci_stack->le_scan_interval = scan_interval; 4002 hci_stack->le_scan_window = scan_window; 4003 hci_run(); 4004 } 4005 4006 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4007 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4008 if (!conn){ 4009 log_info("gap_connect: no connection exists yet, creating context"); 4010 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4011 if (!conn){ 4012 // notify client that alloc failed 4013 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4014 log_info("gap_connect: failed to alloc hci_connection_t"); 4015 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4016 } 4017 conn->state = SEND_CREATE_CONNECTION; 4018 log_info("gap_connect: send create connection next"); 4019 hci_run(); 4020 return 0; 4021 } 4022 4023 if (!hci_is_le_connection(conn) || 4024 conn->state == SEND_CREATE_CONNECTION || 4025 conn->state == SENT_CREATE_CONNECTION) { 4026 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4027 log_error("gap_connect: classic connection or connect is already being created"); 4028 return GATT_CLIENT_IN_WRONG_STATE; 4029 } 4030 4031 log_info("gap_connect: context exists with state %u", conn->state); 4032 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4033 hci_run(); 4034 return 0; 4035 } 4036 4037 // @assumption: only a single outgoing LE Connection exists 4038 static hci_connection_t * gap_get_outgoing_connection(void){ 4039 btstack_linked_item_t *it; 4040 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4041 hci_connection_t * conn = (hci_connection_t *) it; 4042 if (!hci_is_le_connection(conn)) continue; 4043 switch (conn->state){ 4044 case SEND_CREATE_CONNECTION: 4045 case SENT_CREATE_CONNECTION: 4046 case SENT_CANCEL_CONNECTION: 4047 return conn; 4048 default: 4049 break; 4050 }; 4051 } 4052 return NULL; 4053 } 4054 4055 uint8_t gap_connect_cancel(void){ 4056 hci_connection_t * conn = gap_get_outgoing_connection(); 4057 if (!conn) return 0; 4058 switch (conn->state){ 4059 case SEND_CREATE_CONNECTION: 4060 // skip sending create connection and emit event instead 4061 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4062 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4063 btstack_memory_hci_connection_free( conn ); 4064 break; 4065 case SENT_CREATE_CONNECTION: 4066 // request to send cancel connection 4067 conn->state = SEND_CANCEL_CONNECTION; 4068 hci_run(); 4069 break; 4070 default: 4071 break; 4072 } 4073 return 0; 4074 } 4075 #endif 4076 4077 #ifdef ENABLE_LE_CENTRAL 4078 /** 4079 * @brief Set connection parameters for outgoing connections 4080 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4081 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4082 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4083 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4084 * @param conn_latency, default: 4 4085 * @param supervision_timeout (unit: 10ms), default: 720 ms 4086 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4087 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4088 */ 4089 4090 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4091 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4092 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4093 hci_stack->le_connection_scan_interval = conn_scan_interval; 4094 hci_stack->le_connection_scan_window = conn_scan_window; 4095 hci_stack->le_connection_interval_min = conn_interval_min; 4096 hci_stack->le_connection_interval_max = conn_interval_max; 4097 hci_stack->le_connection_latency = conn_latency; 4098 hci_stack->le_supervision_timeout = supervision_timeout; 4099 hci_stack->le_minimum_ce_length = min_ce_length; 4100 hci_stack->le_maximum_ce_length = max_ce_length; 4101 } 4102 #endif 4103 4104 /** 4105 * @brief Updates the connection parameters for a given LE connection 4106 * @param handle 4107 * @param conn_interval_min (unit: 1.25ms) 4108 * @param conn_interval_max (unit: 1.25ms) 4109 * @param conn_latency 4110 * @param supervision_timeout (unit: 10ms) 4111 * @returns 0 if ok 4112 */ 4113 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4114 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4115 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4116 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4117 connection->le_conn_interval_min = conn_interval_min; 4118 connection->le_conn_interval_max = conn_interval_max; 4119 connection->le_conn_latency = conn_latency; 4120 connection->le_supervision_timeout = supervision_timeout; 4121 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4122 hci_run(); 4123 return 0; 4124 } 4125 4126 /** 4127 * @brief Request an update of the connection parameter for a given LE connection 4128 * @param handle 4129 * @param conn_interval_min (unit: 1.25ms) 4130 * @param conn_interval_max (unit: 1.25ms) 4131 * @param conn_latency 4132 * @param supervision_timeout (unit: 10ms) 4133 * @returns 0 if ok 4134 */ 4135 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4136 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4137 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4138 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4139 connection->le_conn_interval_min = conn_interval_min; 4140 connection->le_conn_interval_max = conn_interval_max; 4141 connection->le_conn_latency = conn_latency; 4142 connection->le_supervision_timeout = supervision_timeout; 4143 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4144 hci_run(); 4145 return 0; 4146 } 4147 4148 #ifdef ENABLE_LE_PERIPHERAL 4149 4150 static void gap_advertisments_changed(void){ 4151 // disable advertisements before updating adv, scan data, or adv params 4152 if (hci_stack->le_advertisements_active){ 4153 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4154 } 4155 hci_run(); 4156 } 4157 4158 /** 4159 * @brief Set Advertisement Data 4160 * @param advertising_data_length 4161 * @param advertising_data (max 31 octets) 4162 * @note data is not copied, pointer has to stay valid 4163 */ 4164 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4165 hci_stack->le_advertisements_data_len = advertising_data_length; 4166 hci_stack->le_advertisements_data = advertising_data; 4167 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4168 gap_advertisments_changed(); 4169 } 4170 4171 /** 4172 * @brief Set Scan Response Data 4173 * @param advertising_data_length 4174 * @param advertising_data (max 31 octets) 4175 * @note data is not copied, pointer has to stay valid 4176 */ 4177 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4178 hci_stack->le_scan_response_data_len = scan_response_data_length; 4179 hci_stack->le_scan_response_data = scan_response_data; 4180 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4181 gap_advertisments_changed(); 4182 } 4183 4184 /** 4185 * @brief Set Advertisement Parameters 4186 * @param adv_int_min 4187 * @param adv_int_max 4188 * @param adv_type 4189 * @param direct_address_type 4190 * @param direct_address 4191 * @param channel_map 4192 * @param filter_policy 4193 * 4194 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4195 */ 4196 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4197 uint8_t direct_address_typ, bd_addr_t direct_address, 4198 uint8_t channel_map, uint8_t filter_policy) { 4199 4200 hci_stack->le_advertisements_interval_min = adv_int_min; 4201 hci_stack->le_advertisements_interval_max = adv_int_max; 4202 hci_stack->le_advertisements_type = adv_type; 4203 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4204 hci_stack->le_advertisements_channel_map = channel_map; 4205 hci_stack->le_advertisements_filter_policy = filter_policy; 4206 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4207 4208 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4209 gap_advertisments_changed(); 4210 } 4211 4212 /** 4213 * @brief Enable/Disable Advertisements 4214 * @param enabled 4215 */ 4216 void gap_advertisements_enable(int enabled){ 4217 hci_stack->le_advertisements_enabled = enabled; 4218 if (enabled && !hci_stack->le_advertisements_active){ 4219 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4220 } 4221 if (!enabled && hci_stack->le_advertisements_active){ 4222 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4223 } 4224 hci_run(); 4225 } 4226 4227 #endif 4228 4229 void hci_le_set_own_address_type(uint8_t own_address_type){ 4230 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4231 if (own_address_type == hci_stack->le_own_addr_type) return; 4232 hci_stack->le_own_addr_type = own_address_type; 4233 4234 #ifdef ENABLE_LE_PERIPHERAL 4235 // update advertisement parameters, too 4236 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4237 gap_advertisments_changed(); 4238 #endif 4239 #ifdef ENABLE_LE_CENTRAL 4240 // note: we don't update scan parameters or modify ongoing connection attempts 4241 #endif 4242 } 4243 4244 #endif 4245 4246 uint8_t gap_disconnect(hci_con_handle_t handle){ 4247 hci_connection_t * conn = hci_connection_for_handle(handle); 4248 if (!conn){ 4249 hci_emit_disconnection_complete(handle, 0); 4250 return 0; 4251 } 4252 conn->state = SEND_DISCONNECT; 4253 hci_run(); 4254 return 0; 4255 } 4256 4257 /** 4258 * @brief Get connection type 4259 * @param con_handle 4260 * @result connection_type 4261 */ 4262 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4263 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4264 if (!conn) return GAP_CONNECTION_INVALID; 4265 switch (conn->address_type){ 4266 case BD_ADDR_TYPE_LE_PUBLIC: 4267 case BD_ADDR_TYPE_LE_RANDOM: 4268 return GAP_CONNECTION_LE; 4269 case BD_ADDR_TYPE_SCO: 4270 return GAP_CONNECTION_SCO; 4271 case BD_ADDR_TYPE_CLASSIC: 4272 return GAP_CONNECTION_ACL; 4273 default: 4274 return GAP_CONNECTION_INVALID; 4275 } 4276 } 4277 4278 #ifdef ENABLE_BLE 4279 4280 #ifdef ENABLE_LE_CENTRAL 4281 /** 4282 * @brief Auto Connection Establishment - Start Connecting to device 4283 * @param address_typ 4284 * @param address 4285 * @returns 0 if ok 4286 */ 4287 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4288 // check capacity 4289 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4290 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4291 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4292 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4293 entry->address_type = address_type; 4294 memcpy(entry->address, address, 6); 4295 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4296 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4297 hci_run(); 4298 return 0; 4299 } 4300 4301 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4302 btstack_linked_list_iterator_t it; 4303 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4304 while (btstack_linked_list_iterator_has_next(&it)){ 4305 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4306 if (entry->address_type != address_type) continue; 4307 if (memcmp(entry->address, address, 6) != 0) continue; 4308 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4309 // remove from controller if already present 4310 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4311 continue; 4312 } 4313 // direclty remove entry from whitelist 4314 btstack_linked_list_iterator_remove(&it); 4315 btstack_memory_whitelist_entry_free(entry); 4316 } 4317 } 4318 4319 /** 4320 * @brief Auto Connection Establishment - Stop Connecting to device 4321 * @param address_typ 4322 * @param address 4323 * @returns 0 if ok 4324 */ 4325 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4326 hci_remove_from_whitelist(address_type, address); 4327 hci_run(); 4328 return 0; 4329 } 4330 4331 /** 4332 * @brief Auto Connection Establishment - Stop everything 4333 * @note Convenience function to stop all active auto connection attempts 4334 */ 4335 void gap_auto_connection_stop_all(void){ 4336 btstack_linked_list_iterator_t it; 4337 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4338 while (btstack_linked_list_iterator_has_next(&it)){ 4339 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4340 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4341 // remove from controller if already present 4342 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4343 continue; 4344 } 4345 // directly remove entry from whitelist 4346 btstack_linked_list_iterator_remove(&it); 4347 btstack_memory_whitelist_entry_free(entry); 4348 } 4349 hci_run(); 4350 } 4351 #endif 4352 #endif 4353 4354 #ifdef ENABLE_CLASSIC 4355 /** 4356 * @brief Set Extended Inquiry Response data 4357 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4358 * @note has to be done before stack starts up 4359 */ 4360 void gap_set_extended_inquiry_response(const uint8_t * data){ 4361 hci_stack->eir_data = data; 4362 } 4363 4364 /** 4365 * @brief Start GAP Classic Inquiry 4366 * @param duration in 1.28s units 4367 * @return 0 if ok 4368 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4369 */ 4370 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4371 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4372 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4373 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4374 } 4375 hci_stack->inquiry_state = duration_in_1280ms_units; 4376 hci_run(); 4377 return 0; 4378 } 4379 4380 /** 4381 * @brief Stop GAP Classic Inquiry 4382 * @returns 0 if ok 4383 */ 4384 int gap_inquiry_stop(void){ 4385 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN || hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4386 // emit inquiry complete event, before it even started 4387 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4388 hci_emit_event(event, sizeof(event), 1); 4389 return 0; 4390 } 4391 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4392 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4393 hci_run(); 4394 return 0; 4395 } 4396 4397 4398 /** 4399 * @brief Remote Name Request 4400 * @param addr 4401 * @param page_scan_repetition_mode 4402 * @param clock_offset only used when bit 15 is set 4403 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4404 */ 4405 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4406 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4407 memcpy(hci_stack->remote_name_addr, addr, 6); 4408 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4409 hci_stack->remote_name_clock_offset = clock_offset; 4410 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4411 hci_run(); 4412 return 0; 4413 } 4414 4415 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4416 hci_stack->gap_pairing_state = state; 4417 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4418 hci_run(); 4419 return 0; 4420 } 4421 4422 /** 4423 * @brief Legacy Pairing Pin Code Response 4424 * @param addr 4425 * @param pin 4426 * @return 0 if ok 4427 */ 4428 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4429 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4430 hci_stack->gap_pairing_pin = pin; 4431 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4432 } 4433 4434 /** 4435 * @brief Abort Legacy Pairing 4436 * @param addr 4437 * @param pin 4438 * @return 0 if ok 4439 */ 4440 int gap_pin_code_negative(bd_addr_t addr){ 4441 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4442 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4443 } 4444 4445 /** 4446 * @brief SSP Passkey Response 4447 * @param addr 4448 * @param passkey 4449 * @return 0 if ok 4450 */ 4451 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4452 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4453 hci_stack->gap_pairing_passkey = passkey; 4454 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4455 } 4456 4457 /** 4458 * @brief Abort SSP Passkey Entry/Pairing 4459 * @param addr 4460 * @param pin 4461 * @return 0 if ok 4462 */ 4463 int gap_ssp_passkey_negative(bd_addr_t addr){ 4464 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4465 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 4466 } 4467 4468 /** 4469 * @brief Accept SSP Numeric Comparison 4470 * @param addr 4471 * @param passkey 4472 * @return 0 if ok 4473 */ 4474 int gap_ssp_confirmation_response(bd_addr_t addr){ 4475 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4476 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 4477 } 4478 4479 /** 4480 * @brief Abort SSP Numeric Comparison/Pairing 4481 * @param addr 4482 * @param pin 4483 * @return 0 if ok 4484 */ 4485 int gap_ssp_confirmation_negative(bd_addr_t addr){ 4486 if (hci_stack->gap_pairing_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4487 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 4488 } 4489 4490 /** 4491 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4492 * @param inquiry_mode see bluetooth_defines.h 4493 */ 4494 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4495 hci_stack->inquiry_mode = mode; 4496 } 4497 4498 /** 4499 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4500 */ 4501 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4502 hci_stack->sco_voice_setting = voice_setting; 4503 } 4504 4505 /** 4506 * @brief Get SCO Voice Setting 4507 * @return current voice setting 4508 */ 4509 uint16_t hci_get_sco_voice_setting(void){ 4510 return hci_stack->sco_voice_setting; 4511 } 4512 4513 /** @brief Get SCO packet length for current SCO Voice setting 4514 * @note Using SCO packets of the exact length is required for USB transfer 4515 * @return Length of SCO packets in bytes (not audio frames) 4516 */ 4517 int hci_get_sco_packet_length(void){ 4518 // see Core Spec for H2 USB Transfer. 4519 if (hci_stack->sco_voice_setting & 0x0020) return 51; 4520 return 27; 4521 } 4522 4523 /** 4524 * @brief Sets the master/slave policy 4525 * @param policy (0: attempt to become master, 1: let connecting device decide) 4526 */ 4527 void hci_set_master_slave_policy(uint8_t policy){ 4528 hci_stack->master_slave_policy = policy; 4529 } 4530 4531 #endif 4532 4533 HCI_STATE hci_get_state(void){ 4534 return hci_stack->state; 4535 } 4536 4537 4538 /** 4539 * @brief Set callback for Bluetooth Hardware Error 4540 */ 4541 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 4542 hci_stack->hardware_error_callback = fn; 4543 } 4544 4545 void hci_disconnect_all(void){ 4546 btstack_linked_list_iterator_t it; 4547 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4548 while (btstack_linked_list_iterator_has_next(&it)){ 4549 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4550 if (con->state == SENT_DISCONNECT) continue; 4551 con->state = SEND_DISCONNECT; 4552 } 4553 hci_run(); 4554 } 4555 4556 uint16_t hci_get_manufacturer(void){ 4557 return hci_stack->manufacturer; 4558 } 4559 4560 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 4561 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 4562 if (!hci_con) return NULL; 4563 return &hci_con->sm_connection; 4564 } 4565 4566 #ifdef ENABLE_BLE 4567 4568 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 4569 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 4570 4571 int gap_encryption_key_size(hci_con_handle_t con_handle){ 4572 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4573 if (!sm_conn) return 0; // wrong connection 4574 if (!sm_conn->sm_connection_encrypted) return 0; 4575 return sm_conn->sm_actual_encryption_key_size; 4576 } 4577 4578 int gap_authenticated(hci_con_handle_t con_handle){ 4579 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4580 if (!sm_conn) return 0; // wrong connection 4581 if (!sm_conn->sm_connection_encrypted) return 0; // unencrypted connection cannot be authenticated 4582 return sm_conn->sm_connection_authenticated; 4583 } 4584 4585 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 4586 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4587 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 4588 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 4589 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 4590 return sm_conn->sm_connection_authorization_state; 4591 } 4592 #endif 4593