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_transport_packet_sent(void); 147 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 148 static void hci_emit_nr_connections_changed(void); 149 static void hci_emit_hci_open_failed(void); 150 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 151 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 152 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 153 static void hci_run(void); 154 static int hci_is_le_connection(hci_connection_t * connection); 155 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 156 157 #ifdef ENABLE_BLE 158 #ifdef ENABLE_LE_CENTRAL 159 // called from test/ble_client/advertising_data_parser.c 160 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 161 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 162 static hci_connection_t * gap_get_outgoing_connection(void); 163 #endif 164 #endif 165 166 // the STACK is here 167 #ifndef HAVE_MALLOC 168 static hci_stack_t hci_stack_static; 169 #endif 170 static hci_stack_t * hci_stack = NULL; 171 172 #ifdef ENABLE_CLASSIC 173 // default name 174 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 175 176 // test helper 177 static uint8_t disable_l2cap_timeouts = 0; 178 #endif 179 180 /** 181 * create connection for given address 182 * 183 * @return connection OR NULL, if no memory left 184 */ 185 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 186 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 187 hci_connection_t * conn = btstack_memory_hci_connection_get(); 188 if (!conn) return NULL; 189 memset(conn, 0, sizeof(hci_connection_t)); 190 bd_addr_copy(conn->address, addr); 191 conn->address_type = addr_type; 192 conn->con_handle = 0xffff; 193 conn->authentication_flags = AUTH_FLAGS_NONE; 194 conn->bonding_flags = 0; 195 conn->requested_security_level = LEVEL_0; 196 #ifdef ENABLE_CLASSIC 197 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 198 btstack_run_loop_set_timer_context(&conn->timeout, conn); 199 hci_connection_timestamp(conn); 200 #endif 201 conn->acl_recombination_length = 0; 202 conn->acl_recombination_pos = 0; 203 conn->num_acl_packets_sent = 0; 204 conn->num_sco_packets_sent = 0; 205 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 206 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 207 return conn; 208 } 209 210 211 /** 212 * get le connection parameter range 213 * 214 * @return le connection parameter range struct 215 */ 216 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 217 *range = hci_stack->le_connection_parameter_range; 218 } 219 220 /** 221 * set le connection parameter range 222 * 223 */ 224 225 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 226 hci_stack->le_connection_parameter_range = *range; 227 } 228 229 /** 230 * @brief Test if connection parameters are inside in existing rage 231 * @param conn_interval_min (unit: 1.25ms) 232 * @param conn_interval_max (unit: 1.25ms) 233 * @param conn_latency 234 * @param supervision_timeout (unit: 10ms) 235 * @returns 1 if included 236 */ 237 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 238 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 239 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 240 241 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 242 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 243 244 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 245 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 246 247 return 1; 248 } 249 250 /** 251 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 252 * @note: default: 1 253 * @param max_peripheral_connections 254 */ 255 #ifdef ENABLE_LE_PERIPHERAL 256 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 257 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 258 } 259 #endif 260 261 /** 262 * get hci connections iterator 263 * 264 * @return hci connections iterator 265 */ 266 267 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 268 btstack_linked_list_iterator_init(it, &hci_stack->connections); 269 } 270 271 /** 272 * get connection for a given handle 273 * 274 * @return connection OR NULL, if not found 275 */ 276 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 277 btstack_linked_list_iterator_t it; 278 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 279 while (btstack_linked_list_iterator_has_next(&it)){ 280 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 281 if ( item->con_handle == con_handle ) { 282 return item; 283 } 284 } 285 return NULL; 286 } 287 288 /** 289 * get connection for given address 290 * 291 * @return connection OR NULL, if not found 292 */ 293 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 294 btstack_linked_list_iterator_t it; 295 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 296 while (btstack_linked_list_iterator_has_next(&it)){ 297 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 298 if (connection->address_type != addr_type) continue; 299 if (memcmp(addr, connection->address, 6) != 0) continue; 300 return connection; 301 } 302 return NULL; 303 } 304 305 306 #ifdef ENABLE_CLASSIC 307 308 #ifdef ENABLE_SCO_OVER_HCI 309 static int hci_number_sco_connections(void){ 310 int connections = 0; 311 btstack_linked_list_iterator_t it; 312 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 313 while (btstack_linked_list_iterator_has_next(&it)){ 314 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 315 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 316 connections++; 317 } 318 return connections; 319 } 320 #endif 321 322 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 323 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 324 #ifdef HAVE_EMBEDDED_TICK 325 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 326 // connections might be timed out 327 hci_emit_l2cap_check_timeout(connection); 328 } 329 #else 330 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 331 // connections might be timed out 332 hci_emit_l2cap_check_timeout(connection); 333 } 334 #endif 335 } 336 337 static void hci_connection_timestamp(hci_connection_t *connection){ 338 #ifdef HAVE_EMBEDDED_TICK 339 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 340 #else 341 connection->timestamp = btstack_run_loop_get_time_ms(); 342 #endif 343 } 344 345 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 346 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 347 } 348 349 350 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 351 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 352 } 353 354 /** 355 * add authentication flags and reset timer 356 * @note: assumes classic connection 357 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 358 */ 359 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 360 bd_addr_t addr; 361 reverse_bd_addr(bd_addr, addr); 362 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 363 if (conn) { 364 connectionSetAuthenticationFlags(conn, flags); 365 hci_connection_timestamp(conn); 366 } 367 } 368 369 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 370 hci_connection_t * conn = hci_connection_for_handle(handle); 371 if (!conn) return 0; 372 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 373 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 374 return 0; 375 } 376 377 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 378 if (!hci_stack->link_key_db) return; 379 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 380 hci_stack->link_key_db->delete_link_key(addr); 381 } 382 383 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 384 if (!hci_stack->link_key_db) return; 385 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 386 hci_stack->link_key_db->put_link_key(addr, link_key, type); 387 } 388 389 void gap_delete_all_link_keys(void){ 390 bd_addr_t addr; 391 link_key_t link_key; 392 link_key_type_t type; 393 btstack_link_key_iterator_t it; 394 int ok = gap_link_key_iterator_init(&it); 395 if (!ok) { 396 log_error("could not initialize iterator"); 397 return; 398 } 399 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 400 gap_drop_link_key_for_bd_addr(addr); 401 } 402 gap_link_key_iterator_done(&it); 403 } 404 405 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 406 if (!hci_stack->link_key_db) return 0; 407 if (!hci_stack->link_key_db->iterator_init) return 0; 408 return hci_stack->link_key_db->iterator_init(it); 409 } 410 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 411 if (!hci_stack->link_key_db) return 0; 412 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 413 } 414 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 415 if (!hci_stack->link_key_db) return; 416 hci_stack->link_key_db->iterator_done(it); 417 } 418 #endif 419 420 static int hci_is_le_connection(hci_connection_t * connection){ 421 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 422 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 423 } 424 425 /** 426 * count connections 427 */ 428 static int nr_hci_connections(void){ 429 int count = 0; 430 btstack_linked_item_t *it; 431 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 432 return count; 433 } 434 435 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 436 437 unsigned int num_packets_sent_classic = 0; 438 unsigned int num_packets_sent_le = 0; 439 440 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 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 444 num_packets_sent_classic += connection->num_acl_packets_sent; 445 } else { 446 num_packets_sent_le += connection->num_acl_packets_sent; 447 } 448 } 449 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 450 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 451 int free_slots_le = 0; 452 453 if (free_slots_classic < 0){ 454 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); 455 return 0; 456 } 457 458 if (hci_stack->le_acl_packets_total_num){ 459 // if we have LE slots, they are used 460 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 461 if (free_slots_le < 0){ 462 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); 463 return 0; 464 } 465 } else { 466 // otherwise, classic slots are used for LE, too 467 free_slots_classic -= num_packets_sent_le; 468 if (free_slots_classic < 0){ 469 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); 470 return 0; 471 } 472 } 473 474 switch (address_type){ 475 case BD_ADDR_TYPE_UNKNOWN: 476 log_error("hci_number_free_acl_slots: unknown address type"); 477 return 0; 478 479 case BD_ADDR_TYPE_CLASSIC: 480 return free_slots_classic; 481 482 default: 483 if (hci_stack->le_acl_packets_total_num){ 484 return free_slots_le; 485 } 486 return free_slots_classic; 487 } 488 } 489 490 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 491 // get connection type 492 hci_connection_t * connection = hci_connection_for_handle(con_handle); 493 if (!connection){ 494 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 495 return 0; 496 } 497 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 498 } 499 500 #ifdef ENABLE_CLASSIC 501 static int hci_number_free_sco_slots(void){ 502 unsigned int num_sco_packets_sent = 0; 503 btstack_linked_item_t *it; 504 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 505 hci_connection_t * connection = (hci_connection_t *) it; 506 num_sco_packets_sent += connection->num_sco_packets_sent; 507 } 508 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 509 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 510 return 0; 511 } 512 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 513 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 514 } 515 #endif 516 517 // only used to send HCI Host Number Completed Packets 518 static int hci_can_send_comand_packet_transport(void){ 519 if (hci_stack->hci_packet_buffer_reserved) return 0; 520 521 // check for async hci transport implementations 522 if (hci_stack->hci_transport->can_send_packet_now){ 523 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 524 return 0; 525 } 526 } 527 return 1; 528 } 529 530 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 531 int hci_can_send_command_packet_now(void){ 532 if (hci_can_send_comand_packet_transport() == 0) return 0; 533 return hci_stack->num_cmd_packets > 0; 534 } 535 536 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 537 // check for async hci transport implementations 538 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 539 return hci_stack->hci_transport->can_send_packet_now(packet_type); 540 } 541 542 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 543 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 544 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 545 } 546 547 int hci_can_send_acl_le_packet_now(void){ 548 if (hci_stack->hci_packet_buffer_reserved) return 0; 549 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 550 } 551 552 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 553 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 554 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 555 } 556 557 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 558 if (hci_stack->hci_packet_buffer_reserved) return 0; 559 return hci_can_send_prepared_acl_packet_now(con_handle); 560 } 561 562 #ifdef ENABLE_CLASSIC 563 int hci_can_send_acl_classic_packet_now(void){ 564 if (hci_stack->hci_packet_buffer_reserved) return 0; 565 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 566 } 567 568 int hci_can_send_prepared_sco_packet_now(void){ 569 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 570 if (!hci_stack->synchronous_flow_control_enabled) return 1; 571 return hci_number_free_sco_slots() > 0; 572 } 573 574 int hci_can_send_sco_packet_now(void){ 575 if (hci_stack->hci_packet_buffer_reserved) return 0; 576 return hci_can_send_prepared_sco_packet_now(); 577 } 578 579 void hci_request_sco_can_send_now_event(void){ 580 hci_stack->sco_waiting_for_can_send_now = 1; 581 hci_notify_if_sco_can_send_now(); 582 } 583 #endif 584 585 // used for internal checks in l2cap.c 586 int hci_is_packet_buffer_reserved(void){ 587 return hci_stack->hci_packet_buffer_reserved; 588 } 589 590 // reserves outgoing packet buffer. @returns 1 if successful 591 int hci_reserve_packet_buffer(void){ 592 if (hci_stack->hci_packet_buffer_reserved) { 593 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 594 return 0; 595 } 596 hci_stack->hci_packet_buffer_reserved = 1; 597 return 1; 598 } 599 600 void hci_release_packet_buffer(void){ 601 hci_stack->hci_packet_buffer_reserved = 0; 602 } 603 604 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 605 static int hci_transport_synchronous(void){ 606 return hci_stack->hci_transport->can_send_packet_now == NULL; 607 } 608 609 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 610 611 // 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); 612 613 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 614 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 615 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 616 max_acl_data_packet_length = hci_stack->le_data_packets_length; 617 } 618 619 // testing: reduce buffer to minimum 620 // max_acl_data_packet_length = 52; 621 622 log_debug("hci_send_acl_packet_fragments entered"); 623 624 int err; 625 // multiple packets could be send on a synchronous HCI transport 626 while (1){ 627 628 log_debug("hci_send_acl_packet_fragments loop entered"); 629 630 // get current data 631 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 632 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 633 int more_fragments = 0; 634 635 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 636 if (current_acl_data_packet_length > max_acl_data_packet_length){ 637 more_fragments = 1; 638 current_acl_data_packet_length = max_acl_data_packet_length; 639 } 640 641 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 642 if (acl_header_pos > 0){ 643 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 644 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 645 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 646 } 647 648 // update header len 649 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 650 651 // count packet 652 connection->num_acl_packets_sent++; 653 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 654 655 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 656 if (more_fragments){ 657 // update start of next fragment to send 658 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 659 } else { 660 // done 661 hci_stack->acl_fragmentation_pos = 0; 662 hci_stack->acl_fragmentation_total_size = 0; 663 } 664 665 // send packet 666 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 667 const int size = current_acl_data_packet_length + 4; 668 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 669 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 670 671 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 672 673 // done yet? 674 if (!more_fragments) break; 675 676 // can send more? 677 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 678 } 679 680 log_debug("hci_send_acl_packet_fragments loop over"); 681 682 // release buffer now for synchronous transport 683 if (hci_transport_synchronous()){ 684 hci_release_packet_buffer(); 685 hci_emit_transport_packet_sent(); 686 } 687 688 return err; 689 } 690 691 // pre: caller has reserved the packet buffer 692 int hci_send_acl_packet_buffer(int size){ 693 694 // log_info("hci_send_acl_packet_buffer size %u", size); 695 696 if (!hci_stack->hci_packet_buffer_reserved) { 697 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 698 return 0; 699 } 700 701 uint8_t * packet = hci_stack->hci_packet_buffer; 702 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 703 704 // check for free places on Bluetooth module 705 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 706 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 707 hci_release_packet_buffer(); 708 return BTSTACK_ACL_BUFFERS_FULL; 709 } 710 711 hci_connection_t *connection = hci_connection_for_handle( con_handle); 712 if (!connection) { 713 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 714 hci_release_packet_buffer(); 715 return 0; 716 } 717 718 #ifdef ENABLE_CLASSIC 719 hci_connection_timestamp(connection); 720 #endif 721 722 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 723 724 // setup data 725 hci_stack->acl_fragmentation_total_size = size; 726 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 727 728 return hci_send_acl_packet_fragments(connection); 729 } 730 731 #ifdef ENABLE_CLASSIC 732 // pre: caller has reserved the packet buffer 733 int hci_send_sco_packet_buffer(int size){ 734 735 // log_info("hci_send_acl_packet_buffer size %u", size); 736 737 if (!hci_stack->hci_packet_buffer_reserved) { 738 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 739 return 0; 740 } 741 742 uint8_t * packet = hci_stack->hci_packet_buffer; 743 744 // skip checks in loopback mode 745 if (!hci_stack->loopback_mode){ 746 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 747 748 // check for free places on Bluetooth module 749 if (!hci_can_send_prepared_sco_packet_now()) { 750 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 751 hci_release_packet_buffer(); 752 return BTSTACK_ACL_BUFFERS_FULL; 753 } 754 755 // track send packet in connection struct 756 hci_connection_t *connection = hci_connection_for_handle( con_handle); 757 if (!connection) { 758 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 759 hci_release_packet_buffer(); 760 return 0; 761 } 762 connection->num_sco_packets_sent++; 763 } 764 765 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 766 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 767 768 if (hci_transport_synchronous()){ 769 hci_release_packet_buffer(); 770 hci_emit_transport_packet_sent(); 771 } 772 773 return err; 774 } 775 #endif 776 777 static void acl_handler(uint8_t *packet, int size){ 778 779 // log_info("acl_handler: size %u", size); 780 781 // get info 782 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 783 hci_connection_t *conn = hci_connection_for_handle(con_handle); 784 uint8_t acl_flags = READ_ACL_FLAGS(packet); 785 uint16_t acl_length = READ_ACL_LENGTH(packet); 786 787 // ignore non-registered handle 788 if (!conn){ 789 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 790 return; 791 } 792 793 // assert packet is complete 794 if (acl_length + 4 != size){ 795 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 796 return; 797 } 798 799 #ifdef ENABLE_CLASSIC 800 // update idle timestamp 801 hci_connection_timestamp(conn); 802 #endif 803 804 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 805 hci_stack->host_completed_packets = 1; 806 conn->num_packets_completed++; 807 #endif 808 809 // handle different packet types 810 switch (acl_flags & 0x03) { 811 812 case 0x01: // continuation fragment 813 814 // sanity checks 815 if (conn->acl_recombination_pos == 0) { 816 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 817 return; 818 } 819 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 820 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 821 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 822 conn->acl_recombination_pos = 0; 823 return; 824 } 825 826 // append fragment payload (header already stored) 827 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 828 conn->acl_recombination_pos += acl_length; 829 830 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 831 // conn->acl_recombination_pos, conn->acl_recombination_length); 832 833 // forward complete L2CAP packet if complete. 834 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 835 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 836 // reset recombination buffer 837 conn->acl_recombination_length = 0; 838 conn->acl_recombination_pos = 0; 839 } 840 break; 841 842 case 0x02: { // first fragment 843 844 // sanity check 845 if (conn->acl_recombination_pos) { 846 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 847 conn->acl_recombination_pos = 0; 848 } 849 850 // peek into L2CAP packet! 851 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 852 853 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 854 855 // compare fragment size to L2CAP packet size 856 if (acl_length >= l2cap_length + 4){ 857 // forward fragment as L2CAP packet 858 hci_emit_acl_packet(packet, acl_length + 4); 859 } else { 860 861 if (acl_length > HCI_ACL_BUFFER_SIZE){ 862 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 863 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 864 return; 865 } 866 867 // store first fragment and tweak acl length for complete package 868 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 869 conn->acl_recombination_pos = acl_length + 4; 870 conn->acl_recombination_length = l2cap_length; 871 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 872 } 873 break; 874 875 } 876 default: 877 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 878 return; 879 } 880 881 // execute main loop 882 hci_run(); 883 } 884 885 static void hci_shutdown_connection(hci_connection_t *conn){ 886 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 887 888 #ifdef ENABLE_CLASSIC 889 #ifdef ENABLE_SCO_OVER_HCI 890 int addr_type = conn->address_type; 891 #endif 892 #endif 893 894 btstack_run_loop_remove_timer(&conn->timeout); 895 896 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 897 btstack_memory_hci_connection_free( conn ); 898 899 // now it's gone 900 hci_emit_nr_connections_changed(); 901 902 #ifdef ENABLE_CLASSIC 903 #ifdef ENABLE_SCO_OVER_HCI 904 // update SCO 905 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 906 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 907 } 908 #endif 909 #endif 910 } 911 912 #ifdef ENABLE_CLASSIC 913 914 static const uint16_t packet_type_sizes[] = { 915 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 916 HCI_ACL_DH1_SIZE, 0, 0, 0, 917 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 918 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 919 }; 920 static const uint8_t packet_type_feature_requirement_bit[] = { 921 0, // 3 slot packets 922 1, // 5 slot packets 923 25, // EDR 2 mpbs 924 26, // EDR 3 mbps 925 39, // 3 slot EDR packts 926 40, // 5 slot EDR packet 927 }; 928 static const uint16_t packet_type_feature_packet_mask[] = { 929 0x0f00, // 3 slot packets 930 0xf000, // 5 slot packets 931 0x1102, // EDR 2 mpbs 932 0x2204, // EDR 3 mbps 933 0x0300, // 3 slot EDR packts 934 0x3000, // 5 slot EDR packet 935 }; 936 937 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 938 // enable packet types based on size 939 uint16_t packet_types = 0; 940 unsigned int i; 941 for (i=0;i<16;i++){ 942 if (packet_type_sizes[i] == 0) continue; 943 if (packet_type_sizes[i] <= buffer_size){ 944 packet_types |= 1 << i; 945 } 946 } 947 // disable packet types due to missing local supported features 948 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 949 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 950 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 951 if (feature_set) continue; 952 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 953 packet_types &= ~packet_type_feature_packet_mask[i]; 954 } 955 // flip bits for "may not be used" 956 packet_types ^= 0x3306; 957 return packet_types; 958 } 959 960 uint16_t hci_usable_acl_packet_types(void){ 961 return hci_stack->packet_types; 962 } 963 #endif 964 965 uint8_t* hci_get_outgoing_packet_buffer(void){ 966 // hci packet buffer is >= acl data packet length 967 return hci_stack->hci_packet_buffer; 968 } 969 970 uint16_t hci_max_acl_data_packet_length(void){ 971 return hci_stack->acl_data_packet_length; 972 } 973 974 #ifdef ENABLE_CLASSIC 975 int hci_extended_sco_link_supported(void){ 976 // No. 31, byte 3, bit 7 977 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 978 } 979 #endif 980 981 int hci_non_flushable_packet_boundary_flag_supported(void){ 982 // No. 54, byte 6, bit 6 983 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 984 } 985 986 static int gap_ssp_supported(void){ 987 // No. 51, byte 6, bit 3 988 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 989 } 990 991 static int hci_classic_supported(void){ 992 #ifdef ENABLE_CLASSIC 993 // No. 37, byte 4, bit 5, = No BR/EDR Support 994 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 995 #else 996 return 0; 997 #endif 998 } 999 1000 static int hci_le_supported(void){ 1001 #ifdef ENABLE_BLE 1002 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1003 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1004 #else 1005 return 0; 1006 #endif 1007 } 1008 1009 #ifdef ENABLE_BLE 1010 1011 /** 1012 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1013 */ 1014 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1015 *addr_type = hci_stack->le_own_addr_type; 1016 if (hci_stack->le_own_addr_type){ 1017 memcpy(addr, hci_stack->le_random_address, 6); 1018 } else { 1019 memcpy(addr, hci_stack->local_bd_addr, 6); 1020 } 1021 } 1022 1023 #ifdef ENABLE_LE_CENTRAL 1024 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1025 1026 int offset = 3; 1027 int num_reports = packet[offset]; 1028 offset += 1; 1029 1030 int i; 1031 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1032 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1033 for (i=0; i<num_reports && offset < size;i++){ 1034 uint8_t data_length = btstack_min( packet[offset + 8], LE_ADVERTISING_DATA_SIZE); 1035 uint8_t event_size = 10 + data_length; 1036 int pos = 0; 1037 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1038 event[pos++] = event_size; 1039 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 1040 offset += 8; 1041 pos += 8; 1042 event[pos++] = packet[offset + 1 + data_length]; // rssi 1043 event[pos++] = packet[offset++]; //data_length; 1044 memcpy(&event[pos], &packet[offset], data_length); 1045 pos += data_length; 1046 offset += data_length + 1; // rssi 1047 hci_emit_event(event, pos, 1); 1048 } 1049 } 1050 #endif 1051 #endif 1052 1053 #ifdef ENABLE_BLE 1054 #ifdef ENABLE_LE_PERIPHERAL 1055 static void hci_reenable_advertisements_if_needed(void){ 1056 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1057 // get number of active le slave connections 1058 int num_slave_connections = 0; 1059 btstack_linked_list_iterator_t it; 1060 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1061 while (btstack_linked_list_iterator_has_next(&it)){ 1062 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1063 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1064 if (con->state != OPEN) continue; 1065 if (con->role != HCI_ROLE_SLAVE) continue; 1066 if (!hci_is_le_connection(con)) continue; 1067 num_slave_connections++; 1068 } 1069 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1070 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1071 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1072 } 1073 } 1074 } 1075 #endif 1076 #endif 1077 1078 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1079 1080 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1081 if (!hci_stack->config) return 0; 1082 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1083 // Limit baud rate for Broadcom chipsets to 3 mbps 1084 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 1085 baud_rate = 3000000; 1086 } 1087 return baud_rate; 1088 } 1089 1090 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1091 UNUSED(ds); 1092 1093 switch (hci_stack->substate){ 1094 case HCI_INIT_W4_SEND_RESET: 1095 log_info("Resend HCI Reset"); 1096 hci_stack->substate = HCI_INIT_SEND_RESET; 1097 hci_stack->num_cmd_packets = 1; 1098 hci_run(); 1099 break; 1100 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1101 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1102 if (hci_stack->hci_transport->reset_link){ 1103 hci_stack->hci_transport->reset_link(); 1104 } 1105 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1106 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1107 log_info("Resend HCI Reset - CSR Warm Boot"); 1108 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1109 hci_stack->num_cmd_packets = 1; 1110 hci_run(); 1111 break; 1112 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1113 if (hci_stack->hci_transport->set_baudrate){ 1114 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1115 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1116 hci_stack->hci_transport->set_baudrate(baud_rate); 1117 } 1118 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1119 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1120 if (hci_stack->hci_transport->reset_link){ 1121 log_info("Link Reset"); 1122 hci_stack->hci_transport->reset_link(); 1123 } 1124 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1125 hci_run(); 1126 } 1127 break; 1128 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1129 // otherwise continue 1130 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1131 hci_send_cmd(&hci_read_local_supported_commands); 1132 break; 1133 default: 1134 break; 1135 } 1136 } 1137 #endif 1138 1139 static void hci_initializing_next_state(void){ 1140 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1141 } 1142 1143 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_PERIPHERAL) 1144 static void hci_replace_bd_addr_placeholder(uint8_t * data, uint16_t size){ 1145 const int bd_addr_string_len = 17; 1146 int i = 0; 1147 while (i < size - bd_addr_string_len){ 1148 if (memcmp(&data[i], "00:00:00:00:00:00", bd_addr_string_len)) { 1149 i++; 1150 continue; 1151 } 1152 // set real address 1153 memcpy(&data[i], bd_addr_to_str(hci_stack->local_bd_addr), bd_addr_string_len); 1154 i += bd_addr_string_len; 1155 } 1156 } 1157 #endif 1158 1159 // assumption: hci_can_send_command_packet_now() == true 1160 static void hci_initializing_run(void){ 1161 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1162 switch (hci_stack->substate){ 1163 case HCI_INIT_SEND_RESET: 1164 hci_state_reset(); 1165 1166 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1167 // prepare reset if command complete not received in 100ms 1168 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1169 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1170 btstack_run_loop_add_timer(&hci_stack->timeout); 1171 #endif 1172 // send command 1173 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1174 hci_send_cmd(&hci_reset); 1175 break; 1176 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1177 hci_send_cmd(&hci_read_local_version_information); 1178 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1179 break; 1180 case HCI_INIT_SEND_READ_LOCAL_NAME: 1181 hci_send_cmd(&hci_read_local_name); 1182 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1183 break; 1184 1185 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1186 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1187 hci_state_reset(); 1188 // prepare reset if command complete not received in 100ms 1189 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1190 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1191 btstack_run_loop_add_timer(&hci_stack->timeout); 1192 // send command 1193 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1194 hci_send_cmd(&hci_reset); 1195 break; 1196 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1197 hci_state_reset(); 1198 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1199 hci_send_cmd(&hci_reset); 1200 break; 1201 case HCI_INIT_SEND_BAUD_CHANGE: { 1202 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1203 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1204 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1205 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1206 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1207 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1208 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1209 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1210 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1211 btstack_run_loop_add_timer(&hci_stack->timeout); 1212 } 1213 break; 1214 } 1215 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1216 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1217 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1218 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1219 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1220 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1221 break; 1222 } 1223 case HCI_INIT_CUSTOM_INIT: 1224 // Custom initialization 1225 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1226 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1227 if (valid_cmd){ 1228 int size = 3 + hci_stack->hci_packet_buffer[2]; 1229 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1230 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1231 switch (valid_cmd) { 1232 case BTSTACK_CHIPSET_VALID_COMMAND: 1233 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1234 break; 1235 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1236 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1237 log_info("CSR Warm Boot"); 1238 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1239 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1240 btstack_run_loop_add_timer(&hci_stack->timeout); 1241 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1242 && hci_stack->config 1243 && hci_stack->chipset 1244 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1245 && hci_stack->hci_transport->set_baudrate 1246 && hci_transport_uart_get_main_baud_rate()){ 1247 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1248 } else { 1249 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1250 } 1251 break; 1252 default: 1253 // should not get here 1254 break; 1255 } 1256 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1257 break; 1258 } 1259 log_info("Init script done"); 1260 1261 // Init script download on Broadcom chipsets causes: 1262 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION 1263 || hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA){ 1264 1265 // - baud rate to reset, restore UART baud rate if needed 1266 int need_baud_change = hci_stack->config 1267 && hci_stack->chipset 1268 && hci_stack->chipset->set_baudrate_command 1269 && hci_stack->hci_transport->set_baudrate 1270 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1271 if (need_baud_change) { 1272 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1273 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1274 hci_stack->hci_transport->set_baudrate(baud_rate); 1275 } 1276 1277 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1278 // -> Work around: wait a few milliseconds here. 1279 log_info("BCM delay after init script"); 1280 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1281 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1282 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1283 btstack_run_loop_add_timer(&hci_stack->timeout); 1284 break; 1285 } 1286 } 1287 // otherwise continue 1288 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1289 hci_send_cmd(&hci_read_local_supported_commands); 1290 break; 1291 case HCI_INIT_SET_BD_ADDR: 1292 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1293 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1294 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1295 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1296 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1297 break; 1298 #endif 1299 1300 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1301 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1302 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1303 hci_send_cmd(&hci_read_local_supported_commands); 1304 break; 1305 case HCI_INIT_READ_BD_ADDR: 1306 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1307 hci_send_cmd(&hci_read_bd_addr); 1308 break; 1309 case HCI_INIT_READ_BUFFER_SIZE: 1310 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1311 hci_send_cmd(&hci_read_buffer_size); 1312 break; 1313 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1314 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1315 hci_send_cmd(&hci_read_local_supported_features); 1316 break; 1317 1318 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1319 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1320 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1321 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1322 break; 1323 case HCI_INIT_HOST_BUFFER_SIZE: 1324 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1325 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1326 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1327 break; 1328 #endif 1329 1330 case HCI_INIT_SET_EVENT_MASK: 1331 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1332 if (hci_le_supported()){ 1333 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1334 } else { 1335 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1336 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1337 } 1338 break; 1339 1340 #ifdef ENABLE_CLASSIC 1341 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1342 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1343 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1344 break; 1345 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1346 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1347 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1348 break; 1349 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1350 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1351 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1352 break; 1353 case HCI_INIT_WRITE_LOCAL_NAME: { 1354 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1355 hci_reserve_packet_buffer(); 1356 uint8_t * packet = hci_stack->hci_packet_buffer; 1357 // construct HCI Command and send 1358 uint16_t opcode = hci_write_local_name.opcode; 1359 hci_stack->last_cmd_opcode = opcode; 1360 packet[0] = opcode & 0xff; 1361 packet[1] = opcode >> 8; 1362 packet[2] = DEVICE_NAME_LEN; 1363 memset(&packet[3], 0, DEVICE_NAME_LEN); 1364 memcpy(&packet[3], hci_stack->local_name, strlen(hci_stack->local_name)); 1365 // expand '00:00:00:00:00:00' in name with bd_addr 1366 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1367 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1368 break; 1369 } 1370 case HCI_INIT_WRITE_EIR_DATA: { 1371 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1372 hci_reserve_packet_buffer(); 1373 uint8_t * packet = hci_stack->hci_packet_buffer; 1374 // construct HCI Command and send 1375 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1376 hci_stack->last_cmd_opcode = opcode; 1377 packet[0] = opcode & 0xff; 1378 packet[1] = opcode >> 8; 1379 packet[2] = 1 + 240; 1380 packet[3] = 0; // FEC not required 1381 if (hci_stack->eir_data){ 1382 memcpy(&packet[4], hci_stack->eir_data, 240); 1383 } else { 1384 memset(&packet[4], 0, 240); 1385 int name_len = strlen(hci_stack->local_name); 1386 packet[4] = name_len + 1; 1387 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1388 memcpy(&packet[6], hci_stack->local_name, name_len); 1389 } 1390 // expand '00:00:00:00:00:00' in name with bd_addr 1391 hci_replace_bd_addr_placeholder(&packet[4], 240); 1392 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1393 break; 1394 } 1395 case HCI_INIT_WRITE_INQUIRY_MODE: 1396 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1397 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1398 break; 1399 case HCI_INIT_WRITE_SCAN_ENABLE: 1400 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1401 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1402 break; 1403 // only sent if ENABLE_SCO_OVER_HCI is defined 1404 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1405 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1406 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1407 break; 1408 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1409 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1410 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1411 break; 1412 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1413 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1414 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1415 log_info("BCM: Route SCO data via HCI transport"); 1416 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1417 break; 1418 1419 #endif 1420 #ifdef ENABLE_BLE 1421 // LE INIT 1422 case HCI_INIT_LE_READ_BUFFER_SIZE: 1423 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1424 hci_send_cmd(&hci_le_read_buffer_size); 1425 break; 1426 case HCI_INIT_LE_SET_EVENT_MASK: 1427 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1428 hci_send_cmd(&hci_le_set_event_mask, 0x1FF, 0x0); 1429 break; 1430 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1431 // LE Supported Host = 1, Simultaneous Host = 0 1432 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1433 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1434 break; 1435 #endif 1436 1437 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1438 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1439 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1440 hci_send_cmd(&hci_le_read_maximum_data_length); 1441 break; 1442 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1443 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1444 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1445 break; 1446 #endif 1447 1448 #ifdef ENABLE_LE_CENTRAL 1449 case HCI_INIT_READ_WHITE_LIST_SIZE: 1450 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1451 hci_send_cmd(&hci_le_read_white_list_size); 1452 break; 1453 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1454 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1455 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1456 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1457 break; 1458 #endif 1459 default: 1460 return; 1461 } 1462 } 1463 1464 static void hci_init_done(void){ 1465 // done. tell the app 1466 log_info("hci_init_done -> HCI_STATE_WORKING"); 1467 hci_stack->state = HCI_STATE_WORKING; 1468 hci_emit_state(); 1469 hci_run(); 1470 } 1471 1472 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1473 1474 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1475 1476 uint8_t command_completed = 0; 1477 1478 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1479 uint16_t opcode = little_endian_read_16(packet,3); 1480 if (opcode == hci_stack->last_cmd_opcode){ 1481 command_completed = 1; 1482 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1483 } else { 1484 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1485 } 1486 } 1487 1488 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1489 uint8_t status = packet[2]; 1490 uint16_t opcode = little_endian_read_16(packet,4); 1491 if (opcode == hci_stack->last_cmd_opcode){ 1492 if (status){ 1493 command_completed = 1; 1494 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1495 } else { 1496 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1497 } 1498 } else { 1499 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1500 } 1501 } 1502 1503 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1504 1505 // Vendor == CSR 1506 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1507 // TODO: track actual command 1508 command_completed = 1; 1509 } 1510 1511 // Vendor == Toshiba 1512 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1513 // TODO: track actual command 1514 command_completed = 1; 1515 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1516 hci_stack->num_cmd_packets = 1; 1517 } 1518 1519 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1520 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1521 // 1522 // HCI Reset 1523 // Timeout 100 ms 1524 // HCI Reset 1525 // Command Complete Reset 1526 // HCI Read Local Version Information 1527 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1528 // hang... 1529 // 1530 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1531 if (!command_completed 1532 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1533 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1534 1535 uint16_t opcode = little_endian_read_16(packet,3); 1536 if (opcode == hci_reset.opcode){ 1537 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1538 return; 1539 } 1540 } 1541 1542 // CSR & H5 1543 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1544 if (!command_completed 1545 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1546 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1547 1548 uint16_t opcode = little_endian_read_16(packet,3); 1549 if (opcode == hci_reset.opcode){ 1550 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1551 return; 1552 } 1553 } 1554 1555 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1556 // fix: Correct substate and behave as command below 1557 if (command_completed){ 1558 switch (hci_stack->substate){ 1559 case HCI_INIT_SEND_RESET: 1560 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1561 break; 1562 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1563 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1564 break; 1565 default: 1566 break; 1567 } 1568 } 1569 1570 #endif 1571 1572 if (!command_completed) return; 1573 1574 int need_baud_change = 0; 1575 int need_addr_change = 0; 1576 1577 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1578 need_baud_change = hci_stack->config 1579 && hci_stack->chipset 1580 && hci_stack->chipset->set_baudrate_command 1581 && hci_stack->hci_transport->set_baudrate 1582 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1583 1584 need_addr_change = hci_stack->custom_bd_addr_set 1585 && hci_stack->chipset 1586 && hci_stack->chipset->set_bd_addr_command; 1587 #endif 1588 1589 switch(hci_stack->substate){ 1590 1591 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1592 case HCI_INIT_SEND_RESET: 1593 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1594 // fix: just correct substate and behave as command below 1595 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1596 btstack_run_loop_remove_timer(&hci_stack->timeout); 1597 break; 1598 case HCI_INIT_W4_SEND_RESET: 1599 btstack_run_loop_remove_timer(&hci_stack->timeout); 1600 break; 1601 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1602 log_info("Received local name, need baud change %d", need_baud_change); 1603 if (need_baud_change){ 1604 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1605 return; 1606 } 1607 // skip baud change 1608 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1609 return; 1610 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1611 // for STLC2500D, baud rate change already happened. 1612 // for others, baud rate gets changed now 1613 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1614 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1615 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1616 hci_stack->hci_transport->set_baudrate(baud_rate); 1617 } 1618 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1619 return; 1620 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1621 btstack_run_loop_remove_timer(&hci_stack->timeout); 1622 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1623 return; 1624 case HCI_INIT_W4_CUSTOM_INIT: 1625 // repeat custom init 1626 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1627 return; 1628 #else 1629 case HCI_INIT_W4_SEND_RESET: 1630 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1631 return ; 1632 #endif 1633 1634 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1635 if (need_baud_change && 1636 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1637 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1638 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1639 return; 1640 } 1641 if (need_addr_change){ 1642 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1643 return; 1644 } 1645 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1646 return; 1647 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1648 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1649 if (need_baud_change){ 1650 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1651 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1652 hci_stack->hci_transport->set_baudrate(baud_rate); 1653 } 1654 if (need_addr_change){ 1655 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1656 return; 1657 } 1658 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1659 return; 1660 case HCI_INIT_W4_SET_BD_ADDR: 1661 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1662 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1663 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1664 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1665 return; 1666 } 1667 // skipping st warm boot 1668 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1669 return; 1670 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1671 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1672 return; 1673 #endif 1674 case HCI_INIT_W4_READ_BD_ADDR: 1675 // only read buffer size if supported 1676 if (hci_stack->local_supported_commands[0] & 0x01) { 1677 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1678 return; 1679 } 1680 // skipping read buffer size 1681 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1682 return; 1683 case HCI_INIT_W4_SET_EVENT_MASK: 1684 // skip Classic init commands for LE only chipsets 1685 if (!hci_classic_supported()){ 1686 #ifdef ENABLE_BLE 1687 if (hci_le_supported()){ 1688 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1689 return; 1690 } 1691 #endif 1692 log_error("Neither BR/EDR nor LE supported"); 1693 hci_init_done(); 1694 return; 1695 } 1696 if (!gap_ssp_supported()){ 1697 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1698 return; 1699 } 1700 break; 1701 #ifdef ENABLE_BLE 1702 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1703 // skip write le host if not supported (e.g. on LE only EM9301) 1704 if (hci_stack->local_supported_commands[0] & 0x02) break; 1705 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1706 return; 1707 1708 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1709 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1710 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1711 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1712 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1713 return; 1714 } 1715 // explicit fall through to reduce repetitions 1716 1717 #ifdef ENABLE_LE_CENTRAL 1718 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1719 #else 1720 hci_init_done(); 1721 #endif 1722 return; 1723 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1724 1725 #endif /* ENABLE_BLE */ 1726 1727 #ifdef ENABLE_SCO_OVER_HCI 1728 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1729 // skip write synchronous flow control if not supported 1730 if (hci_stack->local_supported_commands[0] & 0x04) break; 1731 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1732 // explicit fall through to reduce repetitions 1733 1734 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1735 // skip write default erroneous data reporting if not supported 1736 if (hci_stack->local_supported_commands[0] & 0x08) break; 1737 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1738 // explicit fall through to reduce repetitions 1739 1740 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1741 // skip bcm set sco pcm config on non-Broadcom chipsets 1742 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1743 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1744 // explicit fall through to reduce repetitions 1745 1746 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1747 if (!hci_le_supported()){ 1748 // SKIP LE init for Classic only configuration 1749 hci_init_done(); 1750 return; 1751 } 1752 break; 1753 1754 #else /* !ENABLE_SCO_OVER_HCI */ 1755 1756 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1757 #ifdef ENABLE_BLE 1758 if (hci_le_supported()){ 1759 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1760 return; 1761 } 1762 #endif 1763 // SKIP LE init for Classic only configuration 1764 hci_init_done(); 1765 return; 1766 #endif /* ENABLE_SCO_OVER_HCI */ 1767 1768 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1769 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1770 // Response to command before init done state -> init done 1771 case (HCI_INIT_DONE-1): 1772 hci_init_done(); 1773 return; 1774 #endif 1775 1776 default: 1777 break; 1778 } 1779 hci_initializing_next_state(); 1780 } 1781 1782 static void event_handler(uint8_t *packet, int size){ 1783 1784 uint16_t event_length = packet[1]; 1785 1786 // assert packet is complete 1787 if (size != event_length + 2){ 1788 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1789 return; 1790 } 1791 1792 bd_addr_t addr; 1793 bd_addr_type_t addr_type; 1794 hci_con_handle_t handle; 1795 hci_connection_t * conn; 1796 int i; 1797 #ifdef ENABLE_CLASSIC 1798 uint8_t link_type; 1799 #endif 1800 1801 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1802 1803 switch (hci_event_packet_get_type(packet)) { 1804 1805 case HCI_EVENT_COMMAND_COMPLETE: 1806 // get num cmd packets - limit to 1 to reduce complexity 1807 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1808 1809 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1810 if (packet[5]) break; 1811 // terminate, name 248 chars 1812 packet[6+248] = 0; 1813 log_info("local name: %s", &packet[6]); 1814 } 1815 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1816 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1817 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1818 uint16_t acl_len = little_endian_read_16(packet, 6); 1819 uint16_t sco_len = packet[8]; 1820 1821 // determine usable ACL/SCO payload size 1822 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1823 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1824 1825 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1826 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1827 1828 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1829 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1830 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1831 } 1832 } 1833 #ifdef ENABLE_BLE 1834 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1835 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1836 hci_stack->le_acl_packets_total_num = packet[8]; 1837 // determine usable ACL payload size 1838 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1839 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1840 } 1841 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1842 } 1843 #endif 1844 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1845 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1846 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1847 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1848 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); 1849 } 1850 #endif 1851 #ifdef ENABLE_LE_CENTRAL 1852 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1853 hci_stack->le_whitelist_capacity = packet[6]; 1854 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1855 } 1856 #endif 1857 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1858 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1859 hci_stack->local_bd_addr); 1860 log_info("Local Address, Status: 0x%02x: Addr: %s", 1861 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1862 #ifdef ENABLE_CLASSIC 1863 if (hci_stack->link_key_db){ 1864 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1865 } 1866 #endif 1867 } 1868 #ifdef ENABLE_CLASSIC 1869 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1870 hci_emit_discoverable_enabled(hci_stack->discoverable); 1871 } 1872 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1873 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1874 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1875 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1876 hci_emit_event(event, sizeof(event), 1); 1877 } 1878 } 1879 #endif 1880 1881 // Note: HCI init checks 1882 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1883 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1884 1885 #ifdef ENABLE_CLASSIC 1886 // determine usable ACL packet types based on host buffer size and supported features 1887 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1888 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1889 #endif 1890 // Classic/LE 1891 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1892 } 1893 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1894 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1895 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1896 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1897 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1898 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1899 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1900 } 1901 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1902 hci_stack->local_supported_commands[0] = 1903 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1904 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1905 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1906 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 1907 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 1908 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2; // bit 5 = Octet 35, bit 3 1909 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1910 } 1911 #ifdef ENABLE_CLASSIC 1912 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1913 if (packet[5] == 0){ 1914 hci_stack->synchronous_flow_control_enabled = 1; 1915 } 1916 } 1917 #endif 1918 break; 1919 1920 case HCI_EVENT_COMMAND_STATUS: 1921 // get num cmd packets - limit to 1 to reduce complexity 1922 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1923 break; 1924 1925 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1926 int offset = 3; 1927 for (i=0; i<packet[2];i++){ 1928 handle = little_endian_read_16(packet, offset) & 0x0fff; 1929 offset += 2; 1930 uint16_t num_packets = little_endian_read_16(packet, offset); 1931 offset += 2; 1932 1933 conn = hci_connection_for_handle(handle); 1934 if (!conn){ 1935 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1936 continue; 1937 } 1938 1939 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1940 #ifdef ENABLE_CLASSIC 1941 if (conn->num_sco_packets_sent >= num_packets){ 1942 conn->num_sco_packets_sent -= num_packets; 1943 } else { 1944 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1945 conn->num_sco_packets_sent = 0; 1946 } 1947 hci_notify_if_sco_can_send_now(); 1948 #endif 1949 } else { 1950 if (conn->num_acl_packets_sent >= num_packets){ 1951 conn->num_acl_packets_sent -= num_packets; 1952 } else { 1953 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1954 conn->num_acl_packets_sent = 0; 1955 } 1956 } 1957 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1958 } 1959 break; 1960 } 1961 1962 #ifdef ENABLE_CLASSIC 1963 case HCI_EVENT_INQUIRY_COMPLETE: 1964 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 1965 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1966 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1967 hci_emit_event(event, sizeof(event), 1); 1968 } 1969 break; 1970 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1971 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 1972 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 1973 } 1974 break; 1975 case HCI_EVENT_CONNECTION_REQUEST: 1976 reverse_bd_addr(&packet[2], addr); 1977 // TODO: eval COD 8-10 1978 link_type = packet[11]; 1979 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1980 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1981 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1982 if (!conn) { 1983 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1984 } 1985 if (!conn) { 1986 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1987 hci_stack->decline_reason = 0x0d; 1988 bd_addr_copy(hci_stack->decline_addr, addr); 1989 break; 1990 } 1991 conn->role = HCI_ROLE_SLAVE; 1992 conn->state = RECEIVED_CONNECTION_REQUEST; 1993 // store info about eSCO 1994 if (link_type == 0x02){ 1995 conn->remote_supported_feature_eSCO = 1; 1996 } 1997 hci_run(); 1998 break; 1999 2000 case HCI_EVENT_CONNECTION_COMPLETE: 2001 // Connection management 2002 reverse_bd_addr(&packet[5], addr); 2003 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2004 addr_type = BD_ADDR_TYPE_CLASSIC; 2005 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2006 if (conn) { 2007 if (!packet[2]){ 2008 conn->state = OPEN; 2009 conn->con_handle = little_endian_read_16(packet, 3); 2010 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2011 2012 // restart timer 2013 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2014 btstack_run_loop_add_timer(&conn->timeout); 2015 2016 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2017 2018 hci_emit_nr_connections_changed(); 2019 } else { 2020 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2021 uint8_t status = packet[2]; 2022 bd_addr_t bd_address; 2023 memcpy(&bd_address, conn->address, 6); 2024 2025 // connection failed, remove entry 2026 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2027 btstack_memory_hci_connection_free( conn ); 2028 2029 // notify client if dedicated bonding 2030 if (notify_dedicated_bonding_failed){ 2031 log_info("hci notify_dedicated_bonding_failed"); 2032 hci_emit_dedicated_bonding_result(bd_address, status); 2033 } 2034 2035 // if authentication error, also delete link key 2036 if (packet[2] == 0x05) { 2037 gap_drop_link_key_for_bd_addr(addr); 2038 } 2039 } 2040 } 2041 break; 2042 2043 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2044 reverse_bd_addr(&packet[5], addr); 2045 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2046 if (packet[2]){ 2047 // connection failed 2048 break; 2049 } 2050 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2051 if (!conn) { 2052 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2053 } 2054 if (!conn) { 2055 break; 2056 } 2057 conn->state = OPEN; 2058 conn->con_handle = little_endian_read_16(packet, 3); 2059 2060 #ifdef ENABLE_SCO_OVER_HCI 2061 // update SCO 2062 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2063 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2064 } 2065 #endif 2066 break; 2067 2068 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2069 handle = little_endian_read_16(packet, 3); 2070 conn = hci_connection_for_handle(handle); 2071 if (!conn) break; 2072 if (!packet[2]){ 2073 uint8_t * features = &packet[5]; 2074 if (features[6] & (1 << 3)){ 2075 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2076 } 2077 if (features[3] & (1<<7)){ 2078 conn->remote_supported_feature_eSCO = 1; 2079 } 2080 } 2081 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2082 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2083 if (conn->bonding_flags & BONDING_DEDICATED){ 2084 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2085 } 2086 break; 2087 2088 case HCI_EVENT_LINK_KEY_REQUEST: 2089 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2090 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2091 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2092 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2093 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2094 hci_run(); 2095 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2096 return; 2097 2098 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2099 reverse_bd_addr(&packet[2], addr); 2100 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2101 if (!conn) break; 2102 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2103 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2104 // Change Connection Encryption keeps link key type 2105 if (link_key_type != CHANGED_COMBINATION_KEY){ 2106 conn->link_key_type = link_key_type; 2107 } 2108 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2109 // still forward event to allow dismiss of pairing dialog 2110 break; 2111 } 2112 2113 case HCI_EVENT_PIN_CODE_REQUEST: 2114 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2115 // non-bondable mode: pin code negative reply will be sent 2116 if (!hci_stack->bondable){ 2117 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2118 hci_run(); 2119 return; 2120 } 2121 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2122 if (!hci_stack->link_key_db) break; 2123 hci_event_pin_code_request_get_bd_addr(packet, addr); 2124 hci_stack->link_key_db->delete_link_key(addr); 2125 break; 2126 2127 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2128 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2129 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2130 break; 2131 2132 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2133 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2134 if (!hci_stack->ssp_auto_accept) break; 2135 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2136 break; 2137 2138 case HCI_EVENT_USER_PASSKEY_REQUEST: 2139 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2140 if (!hci_stack->ssp_auto_accept) break; 2141 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2142 break; 2143 #endif 2144 2145 case HCI_EVENT_ENCRYPTION_CHANGE: 2146 handle = little_endian_read_16(packet, 3); 2147 conn = hci_connection_for_handle(handle); 2148 if (!conn) break; 2149 if (packet[2] == 0) { 2150 if (packet[5]){ 2151 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2152 } else { 2153 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2154 } 2155 } 2156 #ifdef ENABLE_CLASSIC 2157 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2158 #endif 2159 break; 2160 2161 #ifdef ENABLE_CLASSIC 2162 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2163 handle = little_endian_read_16(packet, 3); 2164 conn = hci_connection_for_handle(handle); 2165 if (!conn) break; 2166 2167 // dedicated bonding: send result and disconnect 2168 if (conn->bonding_flags & BONDING_DEDICATED){ 2169 conn->bonding_flags &= ~BONDING_DEDICATED; 2170 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2171 conn->bonding_status = packet[2]; 2172 break; 2173 } 2174 2175 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2176 // link key sufficient for requested security 2177 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2178 break; 2179 } 2180 // not enough 2181 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2182 break; 2183 #endif 2184 2185 // HCI_EVENT_DISCONNECTION_COMPLETE 2186 // has been split, to first notify stack before shutting connection down 2187 // see end of function, too. 2188 case HCI_EVENT_DISCONNECTION_COMPLETE: 2189 if (packet[2]) break; // status != 0 2190 handle = little_endian_read_16(packet, 3); 2191 // drop outgoing ACL fragments if it is for closed connection 2192 if (hci_stack->acl_fragmentation_total_size > 0) { 2193 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2194 log_info("hci: drop fragmented ACL data for closed connection"); 2195 hci_stack->acl_fragmentation_total_size = 0; 2196 hci_stack->acl_fragmentation_pos = 0; 2197 } 2198 } 2199 2200 // re-enable advertisements for le connections if active 2201 conn = hci_connection_for_handle(handle); 2202 if (!conn) break; 2203 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2204 #ifdef ENABLE_BLE 2205 #ifdef ENABLE_LE_PERIPHERAL 2206 if (hci_is_le_connection(conn)){ 2207 hci_reenable_advertisements_if_needed(); 2208 } 2209 #endif 2210 #endif 2211 break; 2212 2213 case HCI_EVENT_HARDWARE_ERROR: 2214 log_error("Hardware Error: 0x%02x", packet[2]); 2215 if (hci_stack->hardware_error_callback){ 2216 (*hci_stack->hardware_error_callback)(packet[2]); 2217 } else { 2218 // if no special requests, just reboot stack 2219 hci_power_control_off(); 2220 hci_power_control_on(); 2221 } 2222 break; 2223 2224 #ifdef ENABLE_CLASSIC 2225 case HCI_EVENT_ROLE_CHANGE: 2226 if (packet[2]) break; // status != 0 2227 reverse_bd_addr(&packet[3], addr); 2228 addr_type = BD_ADDR_TYPE_CLASSIC; 2229 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2230 if (!conn) break; 2231 conn->role = packet[9]; 2232 break; 2233 #endif 2234 2235 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2236 // release packet buffer only for asynchronous transport and if there are not further fragements 2237 if (hci_transport_synchronous()) { 2238 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2239 return; // instead of break: to avoid re-entering hci_run() 2240 } 2241 if (hci_stack->acl_fragmentation_total_size) break; 2242 hci_release_packet_buffer(); 2243 2244 // L2CAP receives this event via the hci_emit_event below 2245 2246 #ifdef ENABLE_CLASSIC 2247 // For SCO, we do the can_send_now_check here 2248 hci_notify_if_sco_can_send_now(); 2249 #endif 2250 break; 2251 2252 #ifdef ENABLE_CLASSIC 2253 case HCI_EVENT_SCO_CAN_SEND_NOW: 2254 // For SCO, we do the can_send_now_check here 2255 hci_notify_if_sco_can_send_now(); 2256 return; 2257 2258 // explode inquriy results for easier consumption 2259 case HCI_EVENT_INQUIRY_RESULT: 2260 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2261 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2262 gap_inquiry_explode(packet); 2263 break; 2264 #endif 2265 2266 #ifdef ENABLE_BLE 2267 case HCI_EVENT_LE_META: 2268 switch (packet[2]){ 2269 #ifdef ENABLE_LE_CENTRAL 2270 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2271 // log_info("advertising report received"); 2272 if (!hci_stack->le_scanning_enabled) break; 2273 le_handle_advertisement_report(packet, size); 2274 break; 2275 #endif 2276 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2277 // Connection management 2278 reverse_bd_addr(&packet[8], addr); 2279 addr_type = (bd_addr_type_t)packet[7]; 2280 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2281 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2282 2283 #ifdef ENABLE_LE_CENTRAL 2284 // if auto-connect, remove from whitelist in both roles 2285 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2286 hci_remove_from_whitelist(addr_type, addr); 2287 } 2288 // handle error: error is reported only to the initiator -> outgoing connection 2289 if (packet[3]){ 2290 2291 // handle cancelled outgoing connection 2292 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2293 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2294 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2295 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2296 conn = gap_get_outgoing_connection(); 2297 } 2298 2299 // outgoing connection establishment is done 2300 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2301 // remove entry 2302 if (conn){ 2303 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2304 btstack_memory_hci_connection_free( conn ); 2305 } 2306 break; 2307 } 2308 #endif 2309 // on success, both hosts receive connection complete event 2310 if (packet[6] == HCI_ROLE_MASTER){ 2311 #ifdef ENABLE_LE_CENTRAL 2312 // if we're master, it was an outgoing connection and we're done with it 2313 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2314 #endif 2315 } else { 2316 #ifdef ENABLE_LE_PERIPHERAL 2317 // if we're slave, it was an incoming connection, advertisements have stopped 2318 hci_stack->le_advertisements_active = 0; 2319 #endif 2320 } 2321 // LE connections are auto-accepted, so just create a connection if there isn't one already 2322 if (!conn){ 2323 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2324 } 2325 // no memory, sorry. 2326 if (!conn){ 2327 break; 2328 } 2329 2330 conn->state = OPEN; 2331 conn->role = packet[6]; 2332 conn->con_handle = little_endian_read_16(packet, 4); 2333 2334 #ifdef ENABLE_LE_PERIPHERAL 2335 if (packet[6] == HCI_ROLE_SLAVE){ 2336 hci_reenable_advertisements_if_needed(); 2337 } 2338 #endif 2339 2340 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2341 2342 // restart timer 2343 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2344 // btstack_run_loop_add_timer(&conn->timeout); 2345 2346 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2347 2348 hci_emit_nr_connections_changed(); 2349 break; 2350 2351 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2352 2353 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2354 // connection 2355 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2356 conn = hci_connection_for_handle(handle); 2357 if (conn) { 2358 // read arguments 2359 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2360 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2361 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2362 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2363 2364 // validate against current connection parameter range 2365 le_connection_parameter_range_t existing_range; 2366 gap_get_connection_parameter_range(&existing_range); 2367 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2368 if (update_parameter){ 2369 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2370 conn->le_conn_interval_min = le_conn_interval_min; 2371 conn->le_conn_interval_max = le_conn_interval_max; 2372 conn->le_conn_latency = le_conn_latency; 2373 conn->le_supervision_timeout = le_supervision_timeout; 2374 } else { 2375 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2376 } 2377 } 2378 break; 2379 default: 2380 break; 2381 } 2382 break; 2383 #endif 2384 case HCI_EVENT_VENDOR_SPECIFIC: 2385 // Vendor specific commands often create vendor specific event instead of num completed packets 2386 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2387 switch (hci_stack->manufacturer){ 2388 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2389 hci_stack->num_cmd_packets = 1; 2390 break; 2391 default: 2392 break; 2393 } 2394 break; 2395 default: 2396 break; 2397 } 2398 2399 // handle BT initialization 2400 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2401 hci_initializing_event_handler(packet, size); 2402 } 2403 2404 // help with BT sleep 2405 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2406 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2407 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2408 hci_initializing_next_state(); 2409 } 2410 2411 // notify upper stack 2412 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2413 2414 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2415 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2416 if (!packet[2]){ 2417 handle = little_endian_read_16(packet, 3); 2418 hci_connection_t * aConn = hci_connection_for_handle(handle); 2419 if (aConn) { 2420 uint8_t status = aConn->bonding_status; 2421 uint16_t flags = aConn->bonding_flags; 2422 bd_addr_t bd_address; 2423 memcpy(&bd_address, aConn->address, 6); 2424 hci_shutdown_connection(aConn); 2425 // connection struct is gone, don't access anymore 2426 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2427 hci_emit_dedicated_bonding_result(bd_address, status); 2428 } 2429 } 2430 } 2431 } 2432 2433 // execute main loop 2434 hci_run(); 2435 } 2436 2437 #ifdef ENABLE_CLASSIC 2438 static void sco_handler(uint8_t * packet, uint16_t size){ 2439 if (!hci_stack->sco_packet_handler) return; 2440 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2441 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2442 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2443 hci_connection_t *conn = hci_connection_for_handle(con_handle); 2444 if (conn){ 2445 conn->num_packets_completed++; 2446 hci_stack->host_completed_packets = 1; 2447 hci_run(); 2448 } 2449 #endif 2450 } 2451 #endif 2452 2453 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2454 hci_dump_packet(packet_type, 1, packet, size); 2455 switch (packet_type) { 2456 case HCI_EVENT_PACKET: 2457 event_handler(packet, size); 2458 break; 2459 case HCI_ACL_DATA_PACKET: 2460 acl_handler(packet, size); 2461 break; 2462 #ifdef ENABLE_CLASSIC 2463 case HCI_SCO_DATA_PACKET: 2464 sco_handler(packet, size); 2465 break; 2466 #endif 2467 default: 2468 break; 2469 } 2470 } 2471 2472 /** 2473 * @brief Add event packet handler. 2474 */ 2475 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2476 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2477 } 2478 2479 2480 /** Register HCI packet handlers */ 2481 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2482 hci_stack->acl_packet_handler = handler; 2483 } 2484 2485 #ifdef ENABLE_CLASSIC 2486 /** 2487 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2488 */ 2489 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2490 hci_stack->sco_packet_handler = handler; 2491 } 2492 #endif 2493 2494 static void hci_state_reset(void){ 2495 // no connections yet 2496 hci_stack->connections = NULL; 2497 2498 // keep discoverable/connectable as this has been requested by the client(s) 2499 // hci_stack->discoverable = 0; 2500 // hci_stack->connectable = 0; 2501 // hci_stack->bondable = 1; 2502 // hci_stack->own_addr_type = 0; 2503 2504 // buffer is free 2505 hci_stack->hci_packet_buffer_reserved = 0; 2506 2507 // no pending cmds 2508 hci_stack->decline_reason = 0; 2509 hci_stack->new_scan_enable_value = 0xff; 2510 2511 // LE 2512 #ifdef ENABLE_BLE 2513 memset(hci_stack->le_random_address, 0, 6); 2514 hci_stack->le_random_address_set = 0; 2515 #endif 2516 #ifdef ENABLE_LE_CENTRAL 2517 hci_stack->le_scanning_active = 0; 2518 hci_stack->le_scan_type = 0xff; 2519 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2520 hci_stack->le_whitelist = 0; 2521 hci_stack->le_whitelist_capacity = 0; 2522 #endif 2523 } 2524 2525 #ifdef ENABLE_CLASSIC 2526 /** 2527 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2528 */ 2529 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2530 // store and open remote device db 2531 hci_stack->link_key_db = link_key_db; 2532 if (hci_stack->link_key_db) { 2533 hci_stack->link_key_db->open(); 2534 } 2535 } 2536 #endif 2537 2538 void hci_init(const hci_transport_t *transport, const void *config){ 2539 2540 #ifdef HAVE_MALLOC 2541 if (!hci_stack) { 2542 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2543 } 2544 #else 2545 hci_stack = &hci_stack_static; 2546 #endif 2547 memset(hci_stack, 0, sizeof(hci_stack_t)); 2548 2549 // reference to use transport layer implementation 2550 hci_stack->hci_transport = transport; 2551 2552 // reference to used config 2553 hci_stack->config = config; 2554 2555 // setup pointer for outgoing packet buffer 2556 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2557 2558 // max acl payload size defined in config.h 2559 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2560 2561 // register packet handlers with transport 2562 transport->register_packet_handler(&packet_handler); 2563 2564 hci_stack->state = HCI_STATE_OFF; 2565 2566 // class of device 2567 hci_stack->class_of_device = 0x007a020c; // Smartphone 2568 2569 // bondable by default 2570 hci_stack->bondable = 1; 2571 2572 #ifdef ENABLE_CLASSIC 2573 // classic name 2574 hci_stack->local_name = default_classic_name; 2575 2576 // Master slave policy 2577 hci_stack->master_slave_policy = 1; 2578 #endif 2579 2580 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2581 hci_stack->ssp_enable = 1; 2582 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2583 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2584 hci_stack->ssp_auto_accept = 1; 2585 2586 // voice setting - signed 16 bit pcm data with CVSD over the air 2587 hci_stack->sco_voice_setting = 0x60; 2588 2589 #ifdef ENABLE_LE_CENTRAL 2590 // connection parameter to use for outgoing connections 2591 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2592 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2593 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2594 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2595 hci_stack->le_connection_latency = 4; // 4 2596 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2597 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2598 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2599 #endif 2600 2601 #ifdef ENABLE_LE_PERIPHERAL 2602 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2603 #endif 2604 2605 // connection parameter range used to answer connection parameter update requests in l2cap 2606 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2607 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2608 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2609 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2610 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2611 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2612 2613 hci_state_reset(); 2614 } 2615 2616 /** 2617 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2618 */ 2619 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2620 hci_stack->chipset = chipset_driver; 2621 2622 // reset chipset driver - init is also called on power_up 2623 if (hci_stack->chipset && hci_stack->chipset->init){ 2624 hci_stack->chipset->init(hci_stack->config); 2625 } 2626 } 2627 2628 /** 2629 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2630 */ 2631 void hci_set_control(const btstack_control_t *hardware_control){ 2632 // references to used control implementation 2633 hci_stack->control = hardware_control; 2634 // init with transport config 2635 hardware_control->init(hci_stack->config); 2636 } 2637 2638 void hci_close(void){ 2639 // close remote device db 2640 if (hci_stack->link_key_db) { 2641 hci_stack->link_key_db->close(); 2642 } 2643 2644 btstack_linked_list_iterator_t lit; 2645 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2646 while (btstack_linked_list_iterator_has_next(&lit)){ 2647 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2648 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2649 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2650 hci_shutdown_connection(connection); 2651 } 2652 2653 hci_power_control(HCI_POWER_OFF); 2654 2655 #ifdef HAVE_MALLOC 2656 free(hci_stack); 2657 #endif 2658 hci_stack = NULL; 2659 } 2660 2661 #ifdef ENABLE_CLASSIC 2662 void gap_set_class_of_device(uint32_t class_of_device){ 2663 hci_stack->class_of_device = class_of_device; 2664 } 2665 2666 void hci_disable_l2cap_timeout_check(void){ 2667 disable_l2cap_timeouts = 1; 2668 } 2669 #endif 2670 2671 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2672 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2673 void hci_set_bd_addr(bd_addr_t addr){ 2674 memcpy(hci_stack->custom_bd_addr, addr, 6); 2675 hci_stack->custom_bd_addr_set = 1; 2676 } 2677 #endif 2678 2679 // State-Module-Driver overview 2680 // state module low-level 2681 // HCI_STATE_OFF off close 2682 // HCI_STATE_INITIALIZING, on open 2683 // HCI_STATE_WORKING, on open 2684 // HCI_STATE_HALTING, on open 2685 // HCI_STATE_SLEEPING, off/sleep close 2686 // HCI_STATE_FALLING_ASLEEP on open 2687 2688 static int hci_power_control_on(void){ 2689 2690 // power on 2691 int err = 0; 2692 if (hci_stack->control && hci_stack->control->on){ 2693 err = (*hci_stack->control->on)(); 2694 } 2695 if (err){ 2696 log_error( "POWER_ON failed"); 2697 hci_emit_hci_open_failed(); 2698 return err; 2699 } 2700 2701 // int chipset driver 2702 if (hci_stack->chipset && hci_stack->chipset->init){ 2703 hci_stack->chipset->init(hci_stack->config); 2704 } 2705 2706 // init transport 2707 if (hci_stack->hci_transport->init){ 2708 hci_stack->hci_transport->init(hci_stack->config); 2709 } 2710 2711 // open transport 2712 err = hci_stack->hci_transport->open(); 2713 if (err){ 2714 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2715 if (hci_stack->control && hci_stack->control->off){ 2716 (*hci_stack->control->off)(); 2717 } 2718 hci_emit_hci_open_failed(); 2719 return err; 2720 } 2721 return 0; 2722 } 2723 2724 static void hci_power_control_off(void){ 2725 2726 log_info("hci_power_control_off"); 2727 2728 // close low-level device 2729 hci_stack->hci_transport->close(); 2730 2731 log_info("hci_power_control_off - hci_transport closed"); 2732 2733 // power off 2734 if (hci_stack->control && hci_stack->control->off){ 2735 (*hci_stack->control->off)(); 2736 } 2737 2738 log_info("hci_power_control_off - control closed"); 2739 2740 hci_stack->state = HCI_STATE_OFF; 2741 } 2742 2743 static void hci_power_control_sleep(void){ 2744 2745 log_info("hci_power_control_sleep"); 2746 2747 #if 0 2748 // don't close serial port during sleep 2749 2750 // close low-level device 2751 hci_stack->hci_transport->close(hci_stack->config); 2752 #endif 2753 2754 // sleep mode 2755 if (hci_stack->control && hci_stack->control->sleep){ 2756 (*hci_stack->control->sleep)(); 2757 } 2758 2759 hci_stack->state = HCI_STATE_SLEEPING; 2760 } 2761 2762 static int hci_power_control_wake(void){ 2763 2764 log_info("hci_power_control_wake"); 2765 2766 // wake on 2767 if (hci_stack->control && hci_stack->control->wake){ 2768 (*hci_stack->control->wake)(); 2769 } 2770 2771 #if 0 2772 // open low-level device 2773 int err = hci_stack->hci_transport->open(hci_stack->config); 2774 if (err){ 2775 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2776 if (hci_stack->control && hci_stack->control->off){ 2777 (*hci_stack->control->off)(); 2778 } 2779 hci_emit_hci_open_failed(); 2780 return err; 2781 } 2782 #endif 2783 2784 return 0; 2785 } 2786 2787 static void hci_power_transition_to_initializing(void){ 2788 // set up state machine 2789 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2790 hci_stack->hci_packet_buffer_reserved = 0; 2791 hci_stack->state = HCI_STATE_INITIALIZING; 2792 hci_stack->substate = HCI_INIT_SEND_RESET; 2793 } 2794 2795 int hci_power_control(HCI_POWER_MODE power_mode){ 2796 2797 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2798 2799 int err = 0; 2800 switch (hci_stack->state){ 2801 2802 case HCI_STATE_OFF: 2803 switch (power_mode){ 2804 case HCI_POWER_ON: 2805 err = hci_power_control_on(); 2806 if (err) { 2807 log_error("hci_power_control_on() error %d", err); 2808 return err; 2809 } 2810 hci_power_transition_to_initializing(); 2811 break; 2812 case HCI_POWER_OFF: 2813 // do nothing 2814 break; 2815 case HCI_POWER_SLEEP: 2816 // do nothing (with SLEEP == OFF) 2817 break; 2818 } 2819 break; 2820 2821 case HCI_STATE_INITIALIZING: 2822 switch (power_mode){ 2823 case HCI_POWER_ON: 2824 // do nothing 2825 break; 2826 case HCI_POWER_OFF: 2827 // no connections yet, just turn it off 2828 hci_power_control_off(); 2829 break; 2830 case HCI_POWER_SLEEP: 2831 // no connections yet, just turn it off 2832 hci_power_control_sleep(); 2833 break; 2834 } 2835 break; 2836 2837 case HCI_STATE_WORKING: 2838 switch (power_mode){ 2839 case HCI_POWER_ON: 2840 // do nothing 2841 break; 2842 case HCI_POWER_OFF: 2843 // see hci_run 2844 hci_stack->state = HCI_STATE_HALTING; 2845 break; 2846 case HCI_POWER_SLEEP: 2847 // see hci_run 2848 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2849 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2850 break; 2851 } 2852 break; 2853 2854 case HCI_STATE_HALTING: 2855 switch (power_mode){ 2856 case HCI_POWER_ON: 2857 hci_power_transition_to_initializing(); 2858 break; 2859 case HCI_POWER_OFF: 2860 // do nothing 2861 break; 2862 case HCI_POWER_SLEEP: 2863 // see hci_run 2864 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2865 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2866 break; 2867 } 2868 break; 2869 2870 case HCI_STATE_FALLING_ASLEEP: 2871 switch (power_mode){ 2872 case HCI_POWER_ON: 2873 2874 #ifdef HAVE_PLATFORM_IPHONE_OS 2875 // nothing to do, if H4 supports power management 2876 if (btstack_control_iphone_power_management_enabled()){ 2877 hci_stack->state = HCI_STATE_INITIALIZING; 2878 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2879 break; 2880 } 2881 #endif 2882 hci_power_transition_to_initializing(); 2883 break; 2884 case HCI_POWER_OFF: 2885 // see hci_run 2886 hci_stack->state = HCI_STATE_HALTING; 2887 break; 2888 case HCI_POWER_SLEEP: 2889 // do nothing 2890 break; 2891 } 2892 break; 2893 2894 case HCI_STATE_SLEEPING: 2895 switch (power_mode){ 2896 case HCI_POWER_ON: 2897 2898 #ifdef HAVE_PLATFORM_IPHONE_OS 2899 // nothing to do, if H4 supports power management 2900 if (btstack_control_iphone_power_management_enabled()){ 2901 hci_stack->state = HCI_STATE_INITIALIZING; 2902 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2903 hci_update_scan_enable(); 2904 break; 2905 } 2906 #endif 2907 err = hci_power_control_wake(); 2908 if (err) return err; 2909 hci_power_transition_to_initializing(); 2910 break; 2911 case HCI_POWER_OFF: 2912 hci_stack->state = HCI_STATE_HALTING; 2913 break; 2914 case HCI_POWER_SLEEP: 2915 // do nothing 2916 break; 2917 } 2918 break; 2919 } 2920 2921 // create internal event 2922 hci_emit_state(); 2923 2924 // trigger next/first action 2925 hci_run(); 2926 2927 return 0; 2928 } 2929 2930 2931 #ifdef ENABLE_CLASSIC 2932 2933 static void hci_update_scan_enable(void){ 2934 // 2 = page scan, 1 = inq scan 2935 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2936 hci_run(); 2937 } 2938 2939 void gap_discoverable_control(uint8_t enable){ 2940 if (enable) enable = 1; // normalize argument 2941 2942 if (hci_stack->discoverable == enable){ 2943 hci_emit_discoverable_enabled(hci_stack->discoverable); 2944 return; 2945 } 2946 2947 hci_stack->discoverable = enable; 2948 hci_update_scan_enable(); 2949 } 2950 2951 void gap_connectable_control(uint8_t enable){ 2952 if (enable) enable = 1; // normalize argument 2953 2954 // don't emit event 2955 if (hci_stack->connectable == enable) return; 2956 2957 hci_stack->connectable = enable; 2958 hci_update_scan_enable(); 2959 } 2960 #endif 2961 2962 void gap_local_bd_addr(bd_addr_t address_buffer){ 2963 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2964 } 2965 2966 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2967 static void hci_host_num_completed_packets(void){ 2968 2969 // create packet manually as arrays are not supported and num_commands should not get reduced 2970 hci_reserve_packet_buffer(); 2971 uint8_t * packet = hci_get_outgoing_packet_buffer(); 2972 2973 uint16_t size = 0; 2974 uint16_t num_handles = 0; 2975 packet[size++] = 0x35; 2976 packet[size++] = 0x0c; 2977 size++; // skip param len 2978 size++; // skip num handles 2979 2980 // add { handle, packets } entries 2981 btstack_linked_item_t * it; 2982 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2983 hci_connection_t * connection = (hci_connection_t *) it; 2984 if (connection->num_packets_completed){ 2985 little_endian_store_16(packet, size, connection->con_handle); 2986 size += 2; 2987 little_endian_store_16(packet, size, connection->num_packets_completed); 2988 size += 2; 2989 // 2990 num_handles++; 2991 connection->num_packets_completed = 0; 2992 } 2993 } 2994 2995 packet[2] = size - 3; 2996 packet[3] = num_handles; 2997 2998 hci_stack->host_completed_packets = 0; 2999 3000 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3001 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3002 3003 // release packet buffer for synchronous transport implementations 3004 if (hci_transport_synchronous()){ 3005 hci_stack->hci_packet_buffer_reserved = 0; 3006 } 3007 } 3008 #endif 3009 3010 static void hci_run(void){ 3011 3012 // log_info("hci_run: entered"); 3013 btstack_linked_item_t * it; 3014 3015 // send continuation fragments first, as they block the prepared packet buffer 3016 if (hci_stack->acl_fragmentation_total_size > 0) { 3017 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3018 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3019 if (connection) { 3020 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3021 hci_send_acl_packet_fragments(connection); 3022 return; 3023 } 3024 } else { 3025 // connection gone -> discard further fragments 3026 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3027 hci_stack->acl_fragmentation_total_size = 0; 3028 hci_stack->acl_fragmentation_pos = 0; 3029 } 3030 } 3031 3032 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3033 // send host num completed packets next as they don't require num_cmd_packets > 0 3034 if (!hci_can_send_comand_packet_transport()) return; 3035 if (hci_stack->host_completed_packets){ 3036 hci_host_num_completed_packets(); 3037 return; 3038 } 3039 #endif 3040 3041 if (!hci_can_send_command_packet_now()) return; 3042 3043 // global/non-connection oriented commands 3044 3045 #ifdef ENABLE_CLASSIC 3046 // decline incoming connections 3047 if (hci_stack->decline_reason){ 3048 uint8_t reason = hci_stack->decline_reason; 3049 hci_stack->decline_reason = 0; 3050 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3051 return; 3052 } 3053 // send scan enable 3054 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 3055 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3056 hci_stack->new_scan_enable_value = 0xff; 3057 return; 3058 } 3059 // start/stop inquiry 3060 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 3061 uint8_t duration = hci_stack->inquiry_state; 3062 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3063 hci_send_cmd(&hci_inquiry, HCI_INQUIRY_LAP, duration, 0); 3064 return; 3065 } 3066 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3067 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3068 hci_send_cmd(&hci_inquiry_cancel); 3069 return; 3070 } 3071 // remote name request 3072 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3073 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3074 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3075 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3076 return; 3077 } 3078 // pairing 3079 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3080 uint8_t state = hci_stack->gap_pairing_state; 3081 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3082 switch (state){ 3083 case GAP_PAIRING_STATE_SEND_PIN: 3084 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, strlen(hci_stack->gap_pairing_input.gap_pairing_pin), hci_stack->gap_pairing_input.gap_pairing_pin); 3085 break; 3086 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3087 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3088 break; 3089 case GAP_PAIRING_STATE_SEND_PASSKEY: 3090 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3091 break; 3092 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3093 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3094 break; 3095 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3096 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3097 break; 3098 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3099 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3100 break; 3101 default: 3102 break; 3103 } 3104 return; 3105 } 3106 #endif 3107 3108 #ifdef ENABLE_BLE 3109 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 3110 if ((hci_stack->state == HCI_STATE_WORKING) 3111 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 3112 3113 #ifdef ENABLE_LE_CENTRAL 3114 // handle le scan 3115 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3116 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3117 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3118 return; 3119 } 3120 if (hci_stack->le_scan_type != 0xff){ 3121 // defaults: active scanning, accept all advertisement packets 3122 int scan_type = hci_stack->le_scan_type; 3123 hci_stack->le_scan_type = 0xff; 3124 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); 3125 return; 3126 } 3127 #endif 3128 #ifdef ENABLE_LE_PERIPHERAL 3129 // le advertisement control 3130 if (hci_stack->le_advertisements_todo){ 3131 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3132 } 3133 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3134 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3135 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3136 return; 3137 } 3138 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3139 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3140 hci_send_cmd(&hci_le_set_advertising_parameters, 3141 hci_stack->le_advertisements_interval_min, 3142 hci_stack->le_advertisements_interval_max, 3143 hci_stack->le_advertisements_type, 3144 hci_stack->le_own_addr_type, 3145 hci_stack->le_advertisements_direct_address_type, 3146 hci_stack->le_advertisements_direct_address, 3147 hci_stack->le_advertisements_channel_map, 3148 hci_stack->le_advertisements_filter_policy); 3149 return; 3150 } 3151 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3152 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3153 uint8_t adv_data_clean[31]; 3154 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3155 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 3156 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3157 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3158 return; 3159 } 3160 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3161 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3162 uint8_t scan_data_clean[31]; 3163 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3164 memcpy(scan_data_clean, hci_stack->le_scan_response_data, hci_stack->le_scan_response_data_len); 3165 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3166 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, hci_stack->le_scan_response_data); 3167 return; 3168 } 3169 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3170 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3171 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3172 return; 3173 } 3174 #endif 3175 3176 #ifdef ENABLE_LE_CENTRAL 3177 // 3178 // LE Whitelist Management 3179 // 3180 3181 // check if whitelist needs modification 3182 btstack_linked_list_iterator_t lit; 3183 int modification_pending = 0; 3184 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3185 while (btstack_linked_list_iterator_has_next(&lit)){ 3186 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3187 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3188 modification_pending = 1; 3189 break; 3190 } 3191 } 3192 3193 if (modification_pending){ 3194 // stop connnecting if modification pending 3195 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3196 hci_send_cmd(&hci_le_create_connection_cancel); 3197 return; 3198 } 3199 3200 // add/remove entries 3201 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3202 while (btstack_linked_list_iterator_has_next(&lit)){ 3203 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3204 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3205 entry->state = LE_WHITELIST_ON_CONTROLLER; 3206 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3207 return; 3208 3209 } 3210 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3211 bd_addr_t address; 3212 bd_addr_type_t address_type = entry->address_type; 3213 memcpy(address, entry->address, 6); 3214 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3215 btstack_memory_whitelist_entry_free(entry); 3216 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3217 return; 3218 } 3219 } 3220 } 3221 3222 // start connecting 3223 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3224 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3225 bd_addr_t null_addr; 3226 memset(null_addr, 0, 6); 3227 hci_send_cmd(&hci_le_create_connection, 3228 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3229 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3230 1, // use whitelist 3231 0, // peer address type 3232 null_addr, // peer bd addr 3233 hci_stack->le_own_addr_type, // our addr type: 3234 hci_stack->le_connection_interval_min, // conn interval min 3235 hci_stack->le_connection_interval_max, // conn interval max 3236 hci_stack->le_connection_latency, // conn latency 3237 hci_stack->le_supervision_timeout, // conn latency 3238 hci_stack->le_minimum_ce_length, // min ce length 3239 hci_stack->le_maximum_ce_length // max ce length 3240 ); 3241 return; 3242 } 3243 #endif 3244 } 3245 #endif 3246 3247 // send pending HCI commands 3248 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3249 hci_connection_t * connection = (hci_connection_t *) it; 3250 3251 switch(connection->state){ 3252 case SEND_CREATE_CONNECTION: 3253 switch(connection->address_type){ 3254 #ifdef ENABLE_CLASSIC 3255 case BD_ADDR_TYPE_CLASSIC: 3256 log_info("sending hci_create_connection"); 3257 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3258 break; 3259 #endif 3260 default: 3261 #ifdef ENABLE_BLE 3262 #ifdef ENABLE_LE_CENTRAL 3263 log_info("sending hci_le_create_connection"); 3264 hci_send_cmd(&hci_le_create_connection, 3265 hci_stack->le_connection_scan_interval, // conn scan interval 3266 hci_stack->le_connection_scan_window, // conn scan windows 3267 0, // don't use whitelist 3268 connection->address_type, // peer address type 3269 connection->address, // peer bd addr 3270 hci_stack->le_own_addr_type, // our addr type: 3271 hci_stack->le_connection_interval_min, // conn interval min 3272 hci_stack->le_connection_interval_max, // conn interval max 3273 hci_stack->le_connection_latency, // conn latency 3274 hci_stack->le_supervision_timeout, // conn latency 3275 hci_stack->le_minimum_ce_length, // min ce length 3276 hci_stack->le_maximum_ce_length // max ce length 3277 ); 3278 connection->state = SENT_CREATE_CONNECTION; 3279 #endif 3280 #endif 3281 break; 3282 } 3283 return; 3284 3285 #ifdef ENABLE_CLASSIC 3286 case RECEIVED_CONNECTION_REQUEST: 3287 connection->role = HCI_ROLE_SLAVE; 3288 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3289 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3290 connection->state = ACCEPTED_CONNECTION_REQUEST; 3291 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3292 } 3293 return; 3294 #endif 3295 3296 #ifdef ENABLE_BLE 3297 #ifdef ENABLE_LE_CENTRAL 3298 case SEND_CANCEL_CONNECTION: 3299 connection->state = SENT_CANCEL_CONNECTION; 3300 hci_send_cmd(&hci_le_create_connection_cancel); 3301 return; 3302 #endif 3303 #endif 3304 case SEND_DISCONNECT: 3305 connection->state = SENT_DISCONNECT; 3306 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3307 return; 3308 3309 default: 3310 break; 3311 } 3312 3313 #ifdef ENABLE_CLASSIC 3314 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3315 log_info("responding to link key request"); 3316 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3317 link_key_t link_key; 3318 link_key_type_t link_key_type; 3319 if ( hci_stack->link_key_db 3320 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3321 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3322 connection->link_key_type = link_key_type; 3323 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3324 } else { 3325 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3326 } 3327 return; 3328 } 3329 3330 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3331 log_info("denying to pin request"); 3332 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3333 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3334 return; 3335 } 3336 3337 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3338 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3339 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3340 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3341 // tweak authentication requirements 3342 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3343 if (connection->bonding_flags & BONDING_DEDICATED){ 3344 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3345 } 3346 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3347 authreq |= 1; 3348 } 3349 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3350 } else { 3351 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3352 } 3353 return; 3354 } 3355 3356 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3357 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3358 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3359 return; 3360 } 3361 3362 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3363 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3364 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3365 return; 3366 } 3367 3368 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3369 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3370 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3371 return; 3372 } 3373 3374 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3375 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3376 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3377 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3378 return; 3379 } 3380 3381 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3382 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3383 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3384 return; 3385 } 3386 3387 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3388 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3389 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3390 return; 3391 } 3392 #endif 3393 3394 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3395 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3396 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3397 return; 3398 } 3399 3400 #ifdef ENABLE_BLE 3401 switch (connection->le_con_parameter_update_state){ 3402 // response to L2CAP CON PARAMETER UPDATE REQUEST 3403 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3404 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3405 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3406 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3407 0x0000, 0xffff); 3408 break; 3409 case CON_PARAMETER_UPDATE_REPLY: 3410 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3411 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3412 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3413 0x0000, 0xffff); 3414 break; 3415 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3416 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3417 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3418 break; 3419 default: 3420 break; 3421 } 3422 #endif 3423 } 3424 3425 hci_connection_t * connection; 3426 switch (hci_stack->state){ 3427 case HCI_STATE_INITIALIZING: 3428 hci_initializing_run(); 3429 break; 3430 3431 case HCI_STATE_HALTING: 3432 3433 log_info("HCI_STATE_HALTING"); 3434 3435 // free whitelist entries 3436 #ifdef ENABLE_BLE 3437 #ifdef ENABLE_LE_CENTRAL 3438 { 3439 btstack_linked_list_iterator_t lit; 3440 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3441 while (btstack_linked_list_iterator_has_next(&lit)){ 3442 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3443 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3444 btstack_memory_whitelist_entry_free(entry); 3445 } 3446 } 3447 #endif 3448 #endif 3449 // close all open connections 3450 connection = (hci_connection_t *) hci_stack->connections; 3451 if (connection){ 3452 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3453 if (!hci_can_send_command_packet_now()) return; 3454 3455 // check state 3456 if (connection->state == SENT_DISCONNECT) return; 3457 connection->state = SENT_DISCONNECT; 3458 3459 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3460 3461 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3462 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3463 3464 // ... which would be ignored anyway as we shutdown (free) the connection now 3465 hci_shutdown_connection(connection); 3466 3467 // finally, send the disconnect command 3468 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3469 return; 3470 } 3471 log_info("HCI_STATE_HALTING, calling off"); 3472 3473 // switch mode 3474 hci_power_control_off(); 3475 3476 log_info("HCI_STATE_HALTING, emitting state"); 3477 hci_emit_state(); 3478 log_info("HCI_STATE_HALTING, done"); 3479 break; 3480 3481 case HCI_STATE_FALLING_ASLEEP: 3482 switch(hci_stack->substate) { 3483 case HCI_FALLING_ASLEEP_DISCONNECT: 3484 log_info("HCI_STATE_FALLING_ASLEEP"); 3485 // close all open connections 3486 connection = (hci_connection_t *) hci_stack->connections; 3487 3488 #ifdef HAVE_PLATFORM_IPHONE_OS 3489 // don't close connections, if H4 supports power management 3490 if (btstack_control_iphone_power_management_enabled()){ 3491 connection = NULL; 3492 } 3493 #endif 3494 if (connection){ 3495 3496 // send disconnect 3497 if (!hci_can_send_command_packet_now()) return; 3498 3499 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3500 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3501 3502 // send disconnected event right away - causes higher layer connections to get closed, too. 3503 hci_shutdown_connection(connection); 3504 return; 3505 } 3506 3507 if (hci_classic_supported()){ 3508 // disable page and inquiry scan 3509 if (!hci_can_send_command_packet_now()) return; 3510 3511 log_info("HCI_STATE_HALTING, disabling inq scans"); 3512 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3513 3514 // continue in next sub state 3515 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3516 break; 3517 } 3518 // no break - fall through for ble-only chips 3519 3520 case HCI_FALLING_ASLEEP_COMPLETE: 3521 log_info("HCI_STATE_HALTING, calling sleep"); 3522 #ifdef HAVE_PLATFORM_IPHONE_OS 3523 // don't actually go to sleep, if H4 supports power management 3524 if (btstack_control_iphone_power_management_enabled()){ 3525 // SLEEP MODE reached 3526 hci_stack->state = HCI_STATE_SLEEPING; 3527 hci_emit_state(); 3528 break; 3529 } 3530 #endif 3531 // switch mode 3532 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3533 hci_emit_state(); 3534 break; 3535 3536 default: 3537 break; 3538 } 3539 break; 3540 3541 default: 3542 break; 3543 } 3544 } 3545 3546 int hci_send_cmd_packet(uint8_t *packet, int size){ 3547 // house-keeping 3548 3549 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3550 hci_stack->loopback_mode = packet[3]; 3551 } 3552 3553 #ifdef ENABLE_CLASSIC 3554 bd_addr_t addr; 3555 hci_connection_t * conn; 3556 3557 // create_connection? 3558 if (IS_COMMAND(packet, hci_create_connection)){ 3559 reverse_bd_addr(&packet[3], addr); 3560 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3561 3562 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3563 if (!conn){ 3564 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3565 if (!conn){ 3566 // notify client that alloc failed 3567 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3568 return -1; // packet not sent to controller 3569 } 3570 conn->state = SEND_CREATE_CONNECTION; 3571 } 3572 log_info("conn state %u", conn->state); 3573 switch (conn->state){ 3574 // if connection active exists 3575 case OPEN: 3576 // and OPEN, emit connection complete command 3577 hci_emit_connection_complete(addr, conn->con_handle, 0); 3578 return -1; // packet not sent to controller 3579 case SEND_CREATE_CONNECTION: 3580 // connection created by hci, e.g. dedicated bonding 3581 return -1; // packet not sent to controller 3582 default: 3583 // otherwise, just ignore as it is already in the open process 3584 return -1; // packet not sent to controller 3585 } 3586 conn->state = SENT_CREATE_CONNECTION; 3587 } 3588 3589 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3590 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3591 } 3592 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3593 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3594 } 3595 3596 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3597 if (hci_stack->link_key_db){ 3598 reverse_bd_addr(&packet[3], addr); 3599 hci_stack->link_key_db->delete_link_key(addr); 3600 } 3601 } 3602 3603 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3604 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3605 reverse_bd_addr(&packet[3], addr); 3606 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3607 if (conn){ 3608 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3609 } 3610 } 3611 3612 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3613 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3614 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3615 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3616 reverse_bd_addr(&packet[3], addr); 3617 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3618 if (conn){ 3619 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3620 } 3621 } 3622 3623 #ifdef ENABLE_SCO_OVER_HCI 3624 // setup_synchronous_connection? Voice setting at offset 22 3625 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3626 // TODO: compare to current setting if sco connection already active 3627 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3628 } 3629 // accept_synchronus_connection? Voice setting at offset 18 3630 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3631 // TODO: compare to current setting if sco connection already active 3632 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3633 } 3634 #endif 3635 #endif 3636 3637 #ifdef ENABLE_BLE 3638 #ifdef ENABLE_LE_PERIPHERAL 3639 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3640 hci_stack->le_random_address_set = 1; 3641 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3642 } 3643 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3644 hci_stack->le_advertisements_active = packet[3]; 3645 } 3646 #endif 3647 #ifdef ENABLE_LE_CENTRAL 3648 if (IS_COMMAND(packet, hci_le_create_connection)){ 3649 // white list used? 3650 uint8_t initiator_filter_policy = packet[7]; 3651 switch (initiator_filter_policy){ 3652 case 0: 3653 // whitelist not used 3654 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3655 break; 3656 case 1: 3657 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3658 break; 3659 default: 3660 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3661 break; 3662 } 3663 } 3664 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3665 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3666 } 3667 #endif 3668 #endif 3669 3670 hci_stack->num_cmd_packets--; 3671 3672 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3673 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3674 } 3675 3676 // disconnect because of security block 3677 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3678 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3679 if (!connection) return; 3680 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3681 } 3682 3683 3684 // Configure Secure Simple Pairing 3685 3686 #ifdef ENABLE_CLASSIC 3687 3688 // enable will enable SSP during init 3689 void gap_ssp_set_enable(int enable){ 3690 hci_stack->ssp_enable = enable; 3691 } 3692 3693 static int hci_local_ssp_activated(void){ 3694 return gap_ssp_supported() && hci_stack->ssp_enable; 3695 } 3696 3697 // if set, BTstack will respond to io capability request using authentication requirement 3698 void gap_ssp_set_io_capability(int io_capability){ 3699 hci_stack->ssp_io_capability = io_capability; 3700 } 3701 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3702 hci_stack->ssp_authentication_requirement = authentication_requirement; 3703 } 3704 3705 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3706 void gap_ssp_set_auto_accept(int auto_accept){ 3707 hci_stack->ssp_auto_accept = auto_accept; 3708 } 3709 #endif 3710 3711 // va_list part of hci_send_cmd 3712 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3713 if (!hci_can_send_command_packet_now()){ 3714 log_error("hci_send_cmd called but cannot send packet now"); 3715 return 0; 3716 } 3717 3718 // for HCI INITIALIZATION 3719 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3720 hci_stack->last_cmd_opcode = cmd->opcode; 3721 3722 hci_reserve_packet_buffer(); 3723 uint8_t * packet = hci_stack->hci_packet_buffer; 3724 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3725 int err = hci_send_cmd_packet(packet, size); 3726 3727 // release packet buffer for synchronous transport implementations 3728 if (hci_transport_synchronous()){ 3729 hci_stack->hci_packet_buffer_reserved = 0; 3730 } 3731 3732 return err; 3733 } 3734 3735 /** 3736 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3737 */ 3738 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3739 va_list argptr; 3740 va_start(argptr, cmd); 3741 int res = hci_send_cmd_va_arg(cmd, argptr); 3742 va_end(argptr); 3743 return res; 3744 } 3745 3746 // Create various non-HCI events. 3747 // TODO: generalize, use table similar to hci_create_command 3748 3749 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3750 // dump packet 3751 if (dump) { 3752 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3753 } 3754 3755 // dispatch to all event handlers 3756 btstack_linked_list_iterator_t it; 3757 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3758 while (btstack_linked_list_iterator_has_next(&it)){ 3759 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3760 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3761 } 3762 } 3763 3764 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3765 if (!hci_stack->acl_packet_handler) return; 3766 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3767 } 3768 3769 #ifdef ENABLE_CLASSIC 3770 static void hci_notify_if_sco_can_send_now(void){ 3771 // notify SCO sender if waiting 3772 if (!hci_stack->sco_waiting_for_can_send_now) return; 3773 if (hci_can_send_sco_packet_now()){ 3774 hci_stack->sco_waiting_for_can_send_now = 0; 3775 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3776 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3777 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3778 } 3779 } 3780 3781 // parsing end emitting has been merged to reduce code size 3782 static void gap_inquiry_explode(uint8_t * packet){ 3783 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 3784 3785 uint8_t * eir_data; 3786 ad_context_t context; 3787 const uint8_t * name; 3788 uint8_t name_len; 3789 3790 int event_type = hci_event_packet_get_type(packet); 3791 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 3792 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 3793 3794 // event[1] is set at the end 3795 int i; 3796 for (i=0; i<num_responses;i++){ 3797 memset(event, 0, sizeof(event)); 3798 event[0] = GAP_EVENT_INQUIRY_RESULT; 3799 uint8_t event_size = 18; // if name is not set by EIR 3800 3801 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 3802 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 3803 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 3804 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 3805 3806 switch (event_type){ 3807 case HCI_EVENT_INQUIRY_RESULT: 3808 // 14,15,16,17 = 0, size 18 3809 break; 3810 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3811 event[14] = 1; 3812 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3813 // 16,17 = 0, size 18 3814 break; 3815 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3816 event[14] = 1; 3817 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3818 // for EIR packets, there is only one reponse in it 3819 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 3820 name = NULL; 3821 // EIR data is 240 bytes in EIR event 3822 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 3823 uint8_t data_type = ad_iterator_get_data_type(&context); 3824 uint8_t data_size = ad_iterator_get_data_len(&context); 3825 const uint8_t * data = ad_iterator_get_data(&context); 3826 // Prefer Complete Local Name over Shortend Local Name 3827 switch (data_type){ 3828 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 3829 if (name) continue; 3830 /* explicit fall-through */ 3831 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 3832 name = data; 3833 name_len = data_size; 3834 break; 3835 default: 3836 break; 3837 } 3838 } 3839 if (name){ 3840 event[16] = 1; 3841 // truncate name if needed 3842 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 3843 event[17] = len; 3844 memcpy(&event[18], name, len); 3845 event_size += len; 3846 } 3847 break; 3848 } 3849 event[1] = event_size - 2; 3850 hci_emit_event(event, event_size, 1); 3851 } 3852 } 3853 #endif 3854 3855 void hci_emit_state(void){ 3856 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3857 uint8_t event[3]; 3858 event[0] = BTSTACK_EVENT_STATE; 3859 event[1] = sizeof(event) - 2; 3860 event[2] = hci_stack->state; 3861 hci_emit_event(event, sizeof(event), 1); 3862 } 3863 3864 #ifdef ENABLE_CLASSIC 3865 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3866 uint8_t event[13]; 3867 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3868 event[1] = sizeof(event) - 2; 3869 event[2] = status; 3870 little_endian_store_16(event, 3, con_handle); 3871 reverse_bd_addr(address, &event[5]); 3872 event[11] = 1; // ACL connection 3873 event[12] = 0; // encryption disabled 3874 hci_emit_event(event, sizeof(event), 1); 3875 } 3876 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3877 if (disable_l2cap_timeouts) return; 3878 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3879 uint8_t event[4]; 3880 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3881 event[1] = sizeof(event) - 2; 3882 little_endian_store_16(event, 2, conn->con_handle); 3883 hci_emit_event(event, sizeof(event), 1); 3884 } 3885 #endif 3886 3887 #ifdef ENABLE_BLE 3888 #ifdef ENABLE_LE_CENTRAL 3889 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3890 uint8_t event[21]; 3891 event[0] = HCI_EVENT_LE_META; 3892 event[1] = sizeof(event) - 2; 3893 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3894 event[3] = status; 3895 little_endian_store_16(event, 4, con_handle); 3896 event[6] = 0; // TODO: role 3897 event[7] = address_type; 3898 reverse_bd_addr(address, &event[8]); 3899 little_endian_store_16(event, 14, 0); // interval 3900 little_endian_store_16(event, 16, 0); // latency 3901 little_endian_store_16(event, 18, 0); // supervision timeout 3902 event[20] = 0; // master clock accuracy 3903 hci_emit_event(event, sizeof(event), 1); 3904 } 3905 #endif 3906 #endif 3907 3908 static void hci_emit_transport_packet_sent(void){ 3909 // notify upper stack that it might be possible to send again 3910 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 3911 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 3912 } 3913 3914 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3915 uint8_t event[6]; 3916 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3917 event[1] = sizeof(event) - 2; 3918 event[2] = 0; // status = OK 3919 little_endian_store_16(event, 3, con_handle); 3920 event[5] = reason; 3921 hci_emit_event(event, sizeof(event), 1); 3922 } 3923 3924 static void hci_emit_nr_connections_changed(void){ 3925 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3926 uint8_t event[3]; 3927 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3928 event[1] = sizeof(event) - 2; 3929 event[2] = nr_hci_connections(); 3930 hci_emit_event(event, sizeof(event), 1); 3931 } 3932 3933 static void hci_emit_hci_open_failed(void){ 3934 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3935 uint8_t event[2]; 3936 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3937 event[1] = sizeof(event) - 2; 3938 hci_emit_event(event, sizeof(event), 1); 3939 } 3940 3941 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3942 log_info("hci_emit_dedicated_bonding_result %u ", status); 3943 uint8_t event[9]; 3944 int pos = 0; 3945 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3946 event[pos++] = sizeof(event) - 2; 3947 event[pos++] = status; 3948 reverse_bd_addr(address, &event[pos]); 3949 hci_emit_event(event, sizeof(event), 1); 3950 } 3951 3952 3953 #ifdef ENABLE_CLASSIC 3954 3955 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3956 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3957 uint8_t event[5]; 3958 int pos = 0; 3959 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3960 event[pos++] = sizeof(event) - 2; 3961 little_endian_store_16(event, 2, con_handle); 3962 pos += 2; 3963 event[pos++] = level; 3964 hci_emit_event(event, sizeof(event), 1); 3965 } 3966 3967 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3968 if (!connection) return LEVEL_0; 3969 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3970 return gap_security_level_for_link_key_type(connection->link_key_type); 3971 } 3972 3973 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3974 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3975 uint8_t event[3]; 3976 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3977 event[1] = sizeof(event) - 2; 3978 event[2] = enabled; 3979 hci_emit_event(event, sizeof(event), 1); 3980 } 3981 3982 #ifdef ENABLE_CLASSIC 3983 // query if remote side supports eSCO 3984 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3985 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3986 if (!connection) return 0; 3987 return connection->remote_supported_feature_eSCO; 3988 } 3989 3990 // query if remote side supports SSP 3991 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3992 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3993 if (!connection) return 0; 3994 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3995 } 3996 3997 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3998 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3999 } 4000 #endif 4001 4002 // GAP API 4003 /** 4004 * @bbrief enable/disable bonding. default is enabled 4005 * @praram enabled 4006 */ 4007 void gap_set_bondable_mode(int enable){ 4008 hci_stack->bondable = enable ? 1 : 0; 4009 } 4010 /** 4011 * @brief Get bondable mode. 4012 * @return 1 if bondable 4013 */ 4014 int gap_get_bondable_mode(void){ 4015 return hci_stack->bondable; 4016 } 4017 4018 /** 4019 * @brief map link keys to security levels 4020 */ 4021 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4022 switch (link_key_type){ 4023 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4024 return LEVEL_4; 4025 case COMBINATION_KEY: 4026 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4027 return LEVEL_3; 4028 default: 4029 return LEVEL_2; 4030 } 4031 } 4032 4033 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4034 log_info("gap_mitm_protection_required_for_security_level %u", level); 4035 return level > LEVEL_2; 4036 } 4037 4038 /** 4039 * @brief get current security level 4040 */ 4041 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4042 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4043 if (!connection) return LEVEL_0; 4044 return gap_security_level_for_connection(connection); 4045 } 4046 4047 /** 4048 * @brief request connection to device to 4049 * @result GAP_AUTHENTICATION_RESULT 4050 */ 4051 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4052 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4053 if (!connection){ 4054 hci_emit_security_level(con_handle, LEVEL_0); 4055 return; 4056 } 4057 gap_security_level_t current_level = gap_security_level(con_handle); 4058 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4059 requested_level, connection->requested_security_level, current_level); 4060 4061 // assumption: earlier requested security higher than current level => security request is active 4062 if (current_level < connection->requested_security_level){ 4063 if (connection->requested_security_level < requested_level){ 4064 // increase requested level as new level is higher 4065 4066 // TODO: handle re-authentication when done 4067 4068 connection->requested_security_level = requested_level; 4069 } 4070 return; 4071 } 4072 4073 // no request active, notify if security sufficient 4074 if (requested_level <= current_level){ 4075 hci_emit_security_level(con_handle, current_level); 4076 return; 4077 } 4078 4079 // start pairing to increase security level 4080 connection->requested_security_level = requested_level; 4081 4082 #if 0 4083 // sending encryption request without a link key results in an error. 4084 // TODO: figure out how to use it properly 4085 4086 // would enabling ecnryption suffice (>= LEVEL_2)? 4087 if (hci_stack->link_key_db){ 4088 link_key_type_t link_key_type; 4089 link_key_t link_key; 4090 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4091 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4092 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4093 return; 4094 } 4095 } 4096 } 4097 #endif 4098 4099 // start to authenticate connection 4100 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4101 hci_run(); 4102 } 4103 4104 /** 4105 * @brief start dedicated bonding with device. disconnect after bonding 4106 * @param device 4107 * @param request MITM protection 4108 * @result GAP_DEDICATED_BONDING_COMPLETE 4109 */ 4110 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4111 4112 // create connection state machine 4113 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 4114 4115 if (!connection){ 4116 return BTSTACK_MEMORY_ALLOC_FAILED; 4117 } 4118 4119 // delete linkn key 4120 gap_drop_link_key_for_bd_addr(device); 4121 4122 // configure LEVEL_2/3, dedicated bonding 4123 connection->state = SEND_CREATE_CONNECTION; 4124 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4125 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4126 connection->bonding_flags = BONDING_DEDICATED; 4127 4128 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4129 4130 // handle: connnection failure (connection complete != ok) 4131 // handle: authentication failure 4132 // handle: disconnect on done 4133 4134 hci_run(); 4135 4136 return 0; 4137 } 4138 #endif 4139 4140 void gap_set_local_name(const char * local_name){ 4141 hci_stack->local_name = local_name; 4142 } 4143 4144 4145 #ifdef ENABLE_BLE 4146 4147 #ifdef ENABLE_LE_CENTRAL 4148 void gap_start_scan(void){ 4149 hci_stack->le_scanning_enabled = 1; 4150 hci_run(); 4151 } 4152 4153 void gap_stop_scan(void){ 4154 hci_stack->le_scanning_enabled = 0; 4155 hci_run(); 4156 } 4157 4158 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4159 hci_stack->le_scan_type = scan_type; 4160 hci_stack->le_scan_interval = scan_interval; 4161 hci_stack->le_scan_window = scan_window; 4162 hci_run(); 4163 } 4164 4165 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4166 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4167 if (!conn){ 4168 log_info("gap_connect: no connection exists yet, creating context"); 4169 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4170 if (!conn){ 4171 // notify client that alloc failed 4172 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4173 log_info("gap_connect: failed to alloc hci_connection_t"); 4174 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4175 } 4176 conn->state = SEND_CREATE_CONNECTION; 4177 log_info("gap_connect: send create connection next"); 4178 hci_run(); 4179 return 0; 4180 } 4181 4182 if (!hci_is_le_connection(conn) || 4183 conn->state == SEND_CREATE_CONNECTION || 4184 conn->state == SENT_CREATE_CONNECTION) { 4185 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4186 log_error("gap_connect: classic connection or connect is already being created"); 4187 return GATT_CLIENT_IN_WRONG_STATE; 4188 } 4189 4190 log_info("gap_connect: context exists with state %u", conn->state); 4191 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4192 hci_run(); 4193 return 0; 4194 } 4195 4196 // @assumption: only a single outgoing LE Connection exists 4197 static hci_connection_t * gap_get_outgoing_connection(void){ 4198 btstack_linked_item_t *it; 4199 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4200 hci_connection_t * conn = (hci_connection_t *) it; 4201 if (!hci_is_le_connection(conn)) continue; 4202 switch (conn->state){ 4203 case SEND_CREATE_CONNECTION: 4204 case SENT_CREATE_CONNECTION: 4205 case SENT_CANCEL_CONNECTION: 4206 return conn; 4207 default: 4208 break; 4209 }; 4210 } 4211 return NULL; 4212 } 4213 4214 uint8_t gap_connect_cancel(void){ 4215 hci_connection_t * conn = gap_get_outgoing_connection(); 4216 if (!conn) return 0; 4217 switch (conn->state){ 4218 case SEND_CREATE_CONNECTION: 4219 // skip sending create connection and emit event instead 4220 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4221 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4222 btstack_memory_hci_connection_free( conn ); 4223 break; 4224 case SENT_CREATE_CONNECTION: 4225 // request to send cancel connection 4226 conn->state = SEND_CANCEL_CONNECTION; 4227 hci_run(); 4228 break; 4229 default: 4230 break; 4231 } 4232 return 0; 4233 } 4234 #endif 4235 4236 #ifdef ENABLE_LE_CENTRAL 4237 /** 4238 * @brief Set connection parameters for outgoing connections 4239 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4240 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4241 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4242 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4243 * @param conn_latency, default: 4 4244 * @param supervision_timeout (unit: 10ms), default: 720 ms 4245 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4246 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4247 */ 4248 4249 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4250 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4251 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4252 hci_stack->le_connection_scan_interval = conn_scan_interval; 4253 hci_stack->le_connection_scan_window = conn_scan_window; 4254 hci_stack->le_connection_interval_min = conn_interval_min; 4255 hci_stack->le_connection_interval_max = conn_interval_max; 4256 hci_stack->le_connection_latency = conn_latency; 4257 hci_stack->le_supervision_timeout = supervision_timeout; 4258 hci_stack->le_minimum_ce_length = min_ce_length; 4259 hci_stack->le_maximum_ce_length = max_ce_length; 4260 } 4261 #endif 4262 4263 /** 4264 * @brief Updates the connection parameters for a given LE connection 4265 * @param handle 4266 * @param conn_interval_min (unit: 1.25ms) 4267 * @param conn_interval_max (unit: 1.25ms) 4268 * @param conn_latency 4269 * @param supervision_timeout (unit: 10ms) 4270 * @returns 0 if ok 4271 */ 4272 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4273 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4274 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4275 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4276 connection->le_conn_interval_min = conn_interval_min; 4277 connection->le_conn_interval_max = conn_interval_max; 4278 connection->le_conn_latency = conn_latency; 4279 connection->le_supervision_timeout = supervision_timeout; 4280 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4281 hci_run(); 4282 return 0; 4283 } 4284 4285 /** 4286 * @brief Request an update of the connection parameter for a given LE connection 4287 * @param handle 4288 * @param conn_interval_min (unit: 1.25ms) 4289 * @param conn_interval_max (unit: 1.25ms) 4290 * @param conn_latency 4291 * @param supervision_timeout (unit: 10ms) 4292 * @returns 0 if ok 4293 */ 4294 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4295 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4296 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4297 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4298 connection->le_conn_interval_min = conn_interval_min; 4299 connection->le_conn_interval_max = conn_interval_max; 4300 connection->le_conn_latency = conn_latency; 4301 connection->le_supervision_timeout = supervision_timeout; 4302 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4303 hci_run(); 4304 return 0; 4305 } 4306 4307 #ifdef ENABLE_LE_PERIPHERAL 4308 4309 static void gap_advertisments_changed(void){ 4310 // disable advertisements before updating adv, scan data, or adv params 4311 if (hci_stack->le_advertisements_active){ 4312 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4313 } 4314 hci_run(); 4315 } 4316 4317 /** 4318 * @brief Set Advertisement Data 4319 * @param advertising_data_length 4320 * @param advertising_data (max 31 octets) 4321 * @note data is not copied, pointer has to stay valid 4322 */ 4323 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4324 hci_stack->le_advertisements_data_len = advertising_data_length; 4325 hci_stack->le_advertisements_data = advertising_data; 4326 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4327 gap_advertisments_changed(); 4328 } 4329 4330 /** 4331 * @brief Set Scan Response Data 4332 * @param advertising_data_length 4333 * @param advertising_data (max 31 octets) 4334 * @note data is not copied, pointer has to stay valid 4335 */ 4336 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4337 hci_stack->le_scan_response_data_len = scan_response_data_length; 4338 hci_stack->le_scan_response_data = scan_response_data; 4339 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4340 gap_advertisments_changed(); 4341 } 4342 4343 /** 4344 * @brief Set Advertisement Parameters 4345 * @param adv_int_min 4346 * @param adv_int_max 4347 * @param adv_type 4348 * @param direct_address_type 4349 * @param direct_address 4350 * @param channel_map 4351 * @param filter_policy 4352 * 4353 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4354 */ 4355 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4356 uint8_t direct_address_typ, bd_addr_t direct_address, 4357 uint8_t channel_map, uint8_t filter_policy) { 4358 4359 hci_stack->le_advertisements_interval_min = adv_int_min; 4360 hci_stack->le_advertisements_interval_max = adv_int_max; 4361 hci_stack->le_advertisements_type = adv_type; 4362 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4363 hci_stack->le_advertisements_channel_map = channel_map; 4364 hci_stack->le_advertisements_filter_policy = filter_policy; 4365 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4366 4367 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4368 gap_advertisments_changed(); 4369 } 4370 4371 /** 4372 * @brief Enable/Disable Advertisements 4373 * @param enabled 4374 */ 4375 void gap_advertisements_enable(int enabled){ 4376 hci_stack->le_advertisements_enabled = enabled; 4377 if (enabled && !hci_stack->le_advertisements_active){ 4378 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4379 } 4380 if (!enabled && hci_stack->le_advertisements_active){ 4381 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4382 } 4383 hci_run(); 4384 } 4385 4386 #endif 4387 4388 void hci_le_set_own_address_type(uint8_t own_address_type){ 4389 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4390 if (own_address_type == hci_stack->le_own_addr_type) return; 4391 hci_stack->le_own_addr_type = own_address_type; 4392 4393 #ifdef ENABLE_LE_PERIPHERAL 4394 // update advertisement parameters, too 4395 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4396 gap_advertisments_changed(); 4397 #endif 4398 #ifdef ENABLE_LE_CENTRAL 4399 // note: we don't update scan parameters or modify ongoing connection attempts 4400 #endif 4401 } 4402 4403 #endif 4404 4405 uint8_t gap_disconnect(hci_con_handle_t handle){ 4406 hci_connection_t * conn = hci_connection_for_handle(handle); 4407 if (!conn){ 4408 hci_emit_disconnection_complete(handle, 0); 4409 return 0; 4410 } 4411 // ignore if already disconnected 4412 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4413 return 0; 4414 } 4415 conn->state = SEND_DISCONNECT; 4416 hci_run(); 4417 return 0; 4418 } 4419 4420 /** 4421 * @brief Get connection type 4422 * @param con_handle 4423 * @result connection_type 4424 */ 4425 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4426 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4427 if (!conn) return GAP_CONNECTION_INVALID; 4428 switch (conn->address_type){ 4429 case BD_ADDR_TYPE_LE_PUBLIC: 4430 case BD_ADDR_TYPE_LE_RANDOM: 4431 return GAP_CONNECTION_LE; 4432 case BD_ADDR_TYPE_SCO: 4433 return GAP_CONNECTION_SCO; 4434 case BD_ADDR_TYPE_CLASSIC: 4435 return GAP_CONNECTION_ACL; 4436 default: 4437 return GAP_CONNECTION_INVALID; 4438 } 4439 } 4440 4441 #ifdef ENABLE_BLE 4442 4443 #ifdef ENABLE_LE_CENTRAL 4444 /** 4445 * @brief Auto Connection Establishment - Start Connecting to device 4446 * @param address_typ 4447 * @param address 4448 * @returns 0 if ok 4449 */ 4450 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4451 // check capacity 4452 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4453 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4454 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4455 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4456 entry->address_type = address_type; 4457 memcpy(entry->address, address, 6); 4458 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4459 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4460 hci_run(); 4461 return 0; 4462 } 4463 4464 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4465 btstack_linked_list_iterator_t it; 4466 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4467 while (btstack_linked_list_iterator_has_next(&it)){ 4468 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4469 if (entry->address_type != address_type) continue; 4470 if (memcmp(entry->address, address, 6) != 0) continue; 4471 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4472 // remove from controller if already present 4473 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4474 continue; 4475 } 4476 // direclty remove entry from whitelist 4477 btstack_linked_list_iterator_remove(&it); 4478 btstack_memory_whitelist_entry_free(entry); 4479 } 4480 } 4481 4482 /** 4483 * @brief Auto Connection Establishment - Stop Connecting to device 4484 * @param address_typ 4485 * @param address 4486 * @returns 0 if ok 4487 */ 4488 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4489 hci_remove_from_whitelist(address_type, address); 4490 hci_run(); 4491 return 0; 4492 } 4493 4494 /** 4495 * @brief Auto Connection Establishment - Stop everything 4496 * @note Convenience function to stop all active auto connection attempts 4497 */ 4498 void gap_auto_connection_stop_all(void){ 4499 btstack_linked_list_iterator_t it; 4500 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4501 while (btstack_linked_list_iterator_has_next(&it)){ 4502 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4503 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4504 // remove from controller if already present 4505 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4506 continue; 4507 } 4508 // directly remove entry from whitelist 4509 btstack_linked_list_iterator_remove(&it); 4510 btstack_memory_whitelist_entry_free(entry); 4511 } 4512 hci_run(); 4513 } 4514 #endif 4515 #endif 4516 4517 #ifdef ENABLE_CLASSIC 4518 /** 4519 * @brief Set Extended Inquiry Response data 4520 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4521 * @note has to be done before stack starts up 4522 */ 4523 void gap_set_extended_inquiry_response(const uint8_t * data){ 4524 hci_stack->eir_data = data; 4525 } 4526 4527 /** 4528 * @brief Start GAP Classic Inquiry 4529 * @param duration in 1.28s units 4530 * @return 0 if ok 4531 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4532 */ 4533 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4534 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4535 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4536 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4537 } 4538 hci_stack->inquiry_state = duration_in_1280ms_units; 4539 hci_run(); 4540 return 0; 4541 } 4542 4543 /** 4544 * @brief Stop GAP Classic Inquiry 4545 * @returns 0 if ok 4546 */ 4547 int gap_inquiry_stop(void){ 4548 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN || hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4549 // emit inquiry complete event, before it even started 4550 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4551 hci_emit_event(event, sizeof(event), 1); 4552 return 0; 4553 } 4554 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4555 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4556 hci_run(); 4557 return 0; 4558 } 4559 4560 4561 /** 4562 * @brief Remote Name Request 4563 * @param addr 4564 * @param page_scan_repetition_mode 4565 * @param clock_offset only used when bit 15 is set 4566 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4567 */ 4568 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4569 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4570 memcpy(hci_stack->remote_name_addr, addr, 6); 4571 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4572 hci_stack->remote_name_clock_offset = clock_offset; 4573 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4574 hci_run(); 4575 return 0; 4576 } 4577 4578 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4579 hci_stack->gap_pairing_state = state; 4580 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4581 hci_run(); 4582 return 0; 4583 } 4584 4585 /** 4586 * @brief Legacy Pairing Pin Code Response 4587 * @param addr 4588 * @param pin 4589 * @return 0 if ok 4590 */ 4591 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4592 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4593 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 4594 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4595 } 4596 4597 /** 4598 * @brief Abort Legacy Pairing 4599 * @param addr 4600 * @param pin 4601 * @return 0 if ok 4602 */ 4603 int gap_pin_code_negative(bd_addr_t addr){ 4604 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4605 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4606 } 4607 4608 /** 4609 * @brief SSP Passkey Response 4610 * @param addr 4611 * @param passkey 4612 * @return 0 if ok 4613 */ 4614 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4615 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4616 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 4617 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4618 } 4619 4620 /** 4621 * @brief Abort SSP Passkey Entry/Pairing 4622 * @param addr 4623 * @param pin 4624 * @return 0 if ok 4625 */ 4626 int gap_ssp_passkey_negative(bd_addr_t addr){ 4627 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4628 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 4629 } 4630 4631 /** 4632 * @brief Accept SSP Numeric Comparison 4633 * @param addr 4634 * @param passkey 4635 * @return 0 if ok 4636 */ 4637 int gap_ssp_confirmation_response(bd_addr_t addr){ 4638 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4639 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 4640 } 4641 4642 /** 4643 * @brief Abort SSP Numeric Comparison/Pairing 4644 * @param addr 4645 * @param pin 4646 * @return 0 if ok 4647 */ 4648 int gap_ssp_confirmation_negative(bd_addr_t addr){ 4649 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4650 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 4651 } 4652 4653 /** 4654 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4655 * @param inquiry_mode see bluetooth_defines.h 4656 */ 4657 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4658 hci_stack->inquiry_mode = mode; 4659 } 4660 4661 /** 4662 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4663 */ 4664 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4665 hci_stack->sco_voice_setting = voice_setting; 4666 } 4667 4668 /** 4669 * @brief Get SCO Voice Setting 4670 * @return current voice setting 4671 */ 4672 uint16_t hci_get_sco_voice_setting(void){ 4673 return hci_stack->sco_voice_setting; 4674 } 4675 4676 /** @brief Get SCO packet length for current SCO Voice setting 4677 * @note Using SCO packets of the exact length is required for USB transfer 4678 * @return Length of SCO packets in bytes (not audio frames) 4679 */ 4680 int hci_get_sco_packet_length(void){ 4681 int sco_packet_length = 0; 4682 4683 #ifdef ENABLE_CLASSIC 4684 #ifdef ENABLE_SCO_OVER_HCI 4685 // see Core Spec for H2 USB Transfer. 4686 4687 // CVSD requires twice as much bytes 4688 int multiplier = hci_stack->sco_voice_setting & 0x0020 ? 2 : 1; 4689 4690 // 3 byte SCO header + 24 bytes per connection 4691 sco_packet_length = 3 + 24 * hci_number_sco_connections() * multiplier; 4692 #endif 4693 #endif 4694 return sco_packet_length; 4695 } 4696 4697 /** 4698 * @brief Sets the master/slave policy 4699 * @param policy (0: attempt to become master, 1: let connecting device decide) 4700 */ 4701 void hci_set_master_slave_policy(uint8_t policy){ 4702 hci_stack->master_slave_policy = policy; 4703 } 4704 4705 #endif 4706 4707 HCI_STATE hci_get_state(void){ 4708 return hci_stack->state; 4709 } 4710 4711 4712 /** 4713 * @brief Set callback for Bluetooth Hardware Error 4714 */ 4715 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 4716 hci_stack->hardware_error_callback = fn; 4717 } 4718 4719 void hci_disconnect_all(void){ 4720 btstack_linked_list_iterator_t it; 4721 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4722 while (btstack_linked_list_iterator_has_next(&it)){ 4723 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4724 if (con->state == SENT_DISCONNECT) continue; 4725 con->state = SEND_DISCONNECT; 4726 } 4727 hci_run(); 4728 } 4729 4730 uint16_t hci_get_manufacturer(void){ 4731 return hci_stack->manufacturer; 4732 } 4733 4734 #ifdef ENABLE_BLE 4735 4736 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 4737 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 4738 if (!hci_con) return NULL; 4739 return &hci_con->sm_connection; 4740 } 4741 4742 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 4743 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 4744 4745 int gap_encryption_key_size(hci_con_handle_t con_handle){ 4746 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4747 if (!sm_conn) return 0; // wrong connection 4748 if (!sm_conn->sm_connection_encrypted) return 0; 4749 return sm_conn->sm_actual_encryption_key_size; 4750 } 4751 4752 int gap_authenticated(hci_con_handle_t con_handle){ 4753 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4754 if (!sm_conn) return 0; // wrong connection 4755 if (!sm_conn->sm_connection_encrypted) return 0; // unencrypted connection cannot be authenticated 4756 return sm_conn->sm_connection_authenticated; 4757 } 4758 4759 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 4760 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4761 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 4762 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 4763 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 4764 return sm_conn->sm_connection_authorization_state; 4765 } 4766 #endif 4767