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 // prototypes 105 #ifdef ENABLE_CLASSIC 106 static void hci_update_scan_enable(void); 107 static void hci_emit_discoverable_enabled(uint8_t enabled); 108 static int hci_local_ssp_activated(void); 109 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 110 static void hci_notify_if_sco_can_send_now(void); 111 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 112 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 113 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 114 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 115 static void hci_connection_timestamp(hci_connection_t *connection); 116 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 117 static void gap_inquiry_explode(uint8_t * packet); 118 #endif 119 120 static int hci_power_control_on(void); 121 static void hci_power_control_off(void); 122 static void hci_state_reset(void); 123 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 124 static void hci_emit_nr_connections_changed(void); 125 static void hci_emit_hci_open_failed(void); 126 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 127 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 128 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 129 static void hci_run(void); 130 static int hci_is_le_connection(hci_connection_t * connection); 131 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 132 133 #ifdef ENABLE_BLE 134 #ifdef ENABLE_LE_CENTRAL 135 // called from test/ble_client/advertising_data_parser.c 136 void le_handle_advertisement_report(uint8_t *packet, int size); 137 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 138 #endif 139 #endif 140 141 // the STACK is here 142 #ifndef HAVE_MALLOC 143 static hci_stack_t hci_stack_static; 144 #endif 145 static hci_stack_t * hci_stack = NULL; 146 147 #ifdef ENABLE_CLASSIC 148 // test helper 149 static uint8_t disable_l2cap_timeouts = 0; 150 #endif 151 152 /** 153 * create connection for given address 154 * 155 * @return connection OR NULL, if no memory left 156 */ 157 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 158 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 159 hci_connection_t * conn = btstack_memory_hci_connection_get(); 160 if (!conn) return NULL; 161 memset(conn, 0, sizeof(hci_connection_t)); 162 bd_addr_copy(conn->address, addr); 163 conn->address_type = addr_type; 164 conn->con_handle = 0xffff; 165 conn->authentication_flags = AUTH_FLAGS_NONE; 166 conn->bonding_flags = 0; 167 conn->requested_security_level = LEVEL_0; 168 #ifdef ENABLE_CLASSIC 169 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 170 btstack_run_loop_set_timer_context(&conn->timeout, conn); 171 hci_connection_timestamp(conn); 172 #endif 173 conn->acl_recombination_length = 0; 174 conn->acl_recombination_pos = 0; 175 conn->num_acl_packets_sent = 0; 176 conn->num_sco_packets_sent = 0; 177 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 178 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 179 return conn; 180 } 181 182 183 /** 184 * get le connection parameter range 185 * 186 * @return le connection parameter range struct 187 */ 188 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 189 *range = hci_stack->le_connection_parameter_range; 190 } 191 192 /** 193 * set le connection parameter range 194 * 195 */ 196 197 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 198 hci_stack->le_connection_parameter_range = *range; 199 } 200 201 /** 202 * get hci connections iterator 203 * 204 * @return hci connections iterator 205 */ 206 207 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 208 btstack_linked_list_iterator_init(it, &hci_stack->connections); 209 } 210 211 /** 212 * get connection for a given handle 213 * 214 * @return connection OR NULL, if not found 215 */ 216 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 217 btstack_linked_list_iterator_t it; 218 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 219 while (btstack_linked_list_iterator_has_next(&it)){ 220 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 221 if ( item->con_handle == con_handle ) { 222 return item; 223 } 224 } 225 return NULL; 226 } 227 228 /** 229 * get connection for given address 230 * 231 * @return connection OR NULL, if not found 232 */ 233 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 234 btstack_linked_list_iterator_t it; 235 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 236 while (btstack_linked_list_iterator_has_next(&it)){ 237 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 238 if (connection->address_type != addr_type) continue; 239 if (memcmp(addr, connection->address, 6) != 0) continue; 240 return connection; 241 } 242 return NULL; 243 } 244 245 246 #ifdef ENABLE_CLASSIC 247 248 #ifdef ENABLE_SCO_OVER_HCI 249 static int hci_number_sco_connections(void){ 250 int connections = 0; 251 btstack_linked_list_iterator_t it; 252 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 253 while (btstack_linked_list_iterator_has_next(&it)){ 254 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 255 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 256 connections++; 257 } 258 return connections; 259 } 260 #endif 261 262 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 263 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 264 #ifdef HAVE_EMBEDDED_TICK 265 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 266 // connections might be timed out 267 hci_emit_l2cap_check_timeout(connection); 268 } 269 #else 270 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 271 // connections might be timed out 272 hci_emit_l2cap_check_timeout(connection); 273 } 274 #endif 275 } 276 277 static void hci_connection_timestamp(hci_connection_t *connection){ 278 #ifdef HAVE_EMBEDDED_TICK 279 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 280 #else 281 connection->timestamp = btstack_run_loop_get_time_ms(); 282 #endif 283 } 284 285 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 286 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 287 } 288 289 290 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 291 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 292 } 293 294 /** 295 * add authentication flags and reset timer 296 * @note: assumes classic connection 297 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 298 */ 299 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 300 bd_addr_t addr; 301 reverse_bd_addr(bd_addr, addr); 302 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 303 if (conn) { 304 connectionSetAuthenticationFlags(conn, flags); 305 hci_connection_timestamp(conn); 306 } 307 } 308 309 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 310 hci_connection_t * conn = hci_connection_for_handle(handle); 311 if (!conn) return 0; 312 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 313 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 314 return 0; 315 } 316 317 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 318 if (!hci_stack->link_key_db) return; 319 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 320 hci_stack->link_key_db->delete_link_key(addr); 321 } 322 323 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 324 if (!hci_stack->link_key_db) return; 325 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 326 hci_stack->link_key_db->put_link_key(addr, link_key, type); 327 } 328 #endif 329 330 static int hci_is_le_connection(hci_connection_t * connection){ 331 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 332 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 333 } 334 335 /** 336 * count connections 337 */ 338 static int nr_hci_connections(void){ 339 int count = 0; 340 btstack_linked_item_t *it; 341 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 342 return count; 343 } 344 345 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 346 347 unsigned int num_packets_sent_classic = 0; 348 unsigned int num_packets_sent_le = 0; 349 350 btstack_linked_item_t *it; 351 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 352 hci_connection_t * connection = (hci_connection_t *) it; 353 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 354 num_packets_sent_classic += connection->num_acl_packets_sent; 355 } else { 356 num_packets_sent_le += connection->num_acl_packets_sent; 357 } 358 } 359 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 360 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 361 int free_slots_le = 0; 362 363 if (free_slots_classic < 0){ 364 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); 365 return 0; 366 } 367 368 if (hci_stack->le_acl_packets_total_num){ 369 // if we have LE slots, they are used 370 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 371 if (free_slots_le < 0){ 372 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); 373 return 0; 374 } 375 } else { 376 // otherwise, classic slots are used for LE, too 377 free_slots_classic -= num_packets_sent_le; 378 if (free_slots_classic < 0){ 379 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); 380 return 0; 381 } 382 } 383 384 switch (address_type){ 385 case BD_ADDR_TYPE_UNKNOWN: 386 log_error("hci_number_free_acl_slots: unknown address type"); 387 return 0; 388 389 case BD_ADDR_TYPE_CLASSIC: 390 return free_slots_classic; 391 392 default: 393 if (hci_stack->le_acl_packets_total_num){ 394 return free_slots_le; 395 } 396 return free_slots_classic; 397 } 398 } 399 400 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 401 // get connection type 402 hci_connection_t * connection = hci_connection_for_handle(con_handle); 403 if (!connection){ 404 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 405 return 0; 406 } 407 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 408 } 409 410 #ifdef ENABLE_CLASSIC 411 static int hci_number_free_sco_slots(void){ 412 unsigned int num_sco_packets_sent = 0; 413 btstack_linked_item_t *it; 414 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 415 hci_connection_t * connection = (hci_connection_t *) it; 416 num_sco_packets_sent += connection->num_sco_packets_sent; 417 } 418 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 419 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 420 return 0; 421 } 422 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 423 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 424 } 425 #endif 426 427 // only used to send HCI Host Number Completed Packets 428 static int hci_can_send_comand_packet_transport(void){ 429 if (hci_stack->hci_packet_buffer_reserved) return 0; 430 431 // check for async hci transport implementations 432 if (hci_stack->hci_transport->can_send_packet_now){ 433 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 434 return 0; 435 } 436 } 437 return 1; 438 } 439 440 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 441 int hci_can_send_command_packet_now(void){ 442 if (hci_can_send_comand_packet_transport() == 0) return 0; 443 return hci_stack->num_cmd_packets > 0; 444 } 445 446 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 447 // check for async hci transport implementations 448 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 449 return hci_stack->hci_transport->can_send_packet_now(packet_type); 450 } 451 452 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 453 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 454 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 455 } 456 457 int hci_can_send_acl_le_packet_now(void){ 458 if (hci_stack->hci_packet_buffer_reserved) return 0; 459 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 460 } 461 462 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 463 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 464 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 465 } 466 467 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 468 if (hci_stack->hci_packet_buffer_reserved) return 0; 469 return hci_can_send_prepared_acl_packet_now(con_handle); 470 } 471 472 #ifdef ENABLE_CLASSIC 473 int hci_can_send_acl_classic_packet_now(void){ 474 if (hci_stack->hci_packet_buffer_reserved) return 0; 475 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 476 } 477 478 int hci_can_send_prepared_sco_packet_now(void){ 479 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 480 if (!hci_stack->synchronous_flow_control_enabled) return 1; 481 return hci_number_free_sco_slots() > 0; 482 } 483 484 int hci_can_send_sco_packet_now(void){ 485 if (hci_stack->hci_packet_buffer_reserved) return 0; 486 return hci_can_send_prepared_sco_packet_now(); 487 } 488 489 void hci_request_sco_can_send_now_event(void){ 490 hci_stack->sco_waiting_for_can_send_now = 1; 491 hci_notify_if_sco_can_send_now(); 492 } 493 #endif 494 495 // used for internal checks in l2cap.c 496 int hci_is_packet_buffer_reserved(void){ 497 return hci_stack->hci_packet_buffer_reserved; 498 } 499 500 // reserves outgoing packet buffer. @returns 1 if successful 501 int hci_reserve_packet_buffer(void){ 502 if (hci_stack->hci_packet_buffer_reserved) { 503 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 504 return 0; 505 } 506 hci_stack->hci_packet_buffer_reserved = 1; 507 return 1; 508 } 509 510 void hci_release_packet_buffer(void){ 511 hci_stack->hci_packet_buffer_reserved = 0; 512 } 513 514 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 515 static int hci_transport_synchronous(void){ 516 return hci_stack->hci_transport->can_send_packet_now == NULL; 517 } 518 519 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 520 521 // 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); 522 523 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 524 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 525 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 526 max_acl_data_packet_length = hci_stack->le_data_packets_length; 527 } 528 529 // testing: reduce buffer to minimum 530 // max_acl_data_packet_length = 52; 531 532 log_debug("hci_send_acl_packet_fragments entered"); 533 534 int err; 535 // multiple packets could be send on a synchronous HCI transport 536 while (1){ 537 538 log_debug("hci_send_acl_packet_fragments loop entered"); 539 540 // get current data 541 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 542 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 543 int more_fragments = 0; 544 545 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 546 if (current_acl_data_packet_length > max_acl_data_packet_length){ 547 more_fragments = 1; 548 current_acl_data_packet_length = max_acl_data_packet_length; 549 } 550 551 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 552 if (acl_header_pos > 0){ 553 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 554 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 555 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 556 } 557 558 // update header len 559 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 560 561 // count packet 562 connection->num_acl_packets_sent++; 563 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 564 565 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 566 if (more_fragments){ 567 // update start of next fragment to send 568 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 569 } else { 570 // done 571 hci_stack->acl_fragmentation_pos = 0; 572 hci_stack->acl_fragmentation_total_size = 0; 573 } 574 575 // send packet 576 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 577 const int size = current_acl_data_packet_length + 4; 578 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 579 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 580 581 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 582 583 // done yet? 584 if (!more_fragments) break; 585 586 // can send more? 587 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 588 } 589 590 log_debug("hci_send_acl_packet_fragments loop over"); 591 592 // release buffer now for synchronous transport 593 if (hci_transport_synchronous()){ 594 hci_release_packet_buffer(); 595 // notify upper stack that it might be possible to send again 596 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 597 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 598 } 599 600 return err; 601 } 602 603 // pre: caller has reserved the packet buffer 604 int hci_send_acl_packet_buffer(int size){ 605 606 // log_info("hci_send_acl_packet_buffer size %u", size); 607 608 if (!hci_stack->hci_packet_buffer_reserved) { 609 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 610 return 0; 611 } 612 613 uint8_t * packet = hci_stack->hci_packet_buffer; 614 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 615 616 // check for free places on Bluetooth module 617 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 618 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 619 hci_release_packet_buffer(); 620 return BTSTACK_ACL_BUFFERS_FULL; 621 } 622 623 hci_connection_t *connection = hci_connection_for_handle( con_handle); 624 if (!connection) { 625 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 626 hci_release_packet_buffer(); 627 return 0; 628 } 629 630 #ifdef ENABLE_CLASSIC 631 hci_connection_timestamp(connection); 632 #endif 633 634 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 635 636 // setup data 637 hci_stack->acl_fragmentation_total_size = size; 638 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 639 640 return hci_send_acl_packet_fragments(connection); 641 } 642 643 #ifdef ENABLE_CLASSIC 644 // pre: caller has reserved the packet buffer 645 int hci_send_sco_packet_buffer(int size){ 646 647 // log_info("hci_send_acl_packet_buffer size %u", size); 648 649 if (!hci_stack->hci_packet_buffer_reserved) { 650 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 651 return 0; 652 } 653 654 uint8_t * packet = hci_stack->hci_packet_buffer; 655 656 // skip checks in loopback mode 657 if (!hci_stack->loopback_mode){ 658 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 659 660 // check for free places on Bluetooth module 661 if (!hci_can_send_prepared_sco_packet_now()) { 662 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 663 hci_release_packet_buffer(); 664 return BTSTACK_ACL_BUFFERS_FULL; 665 } 666 667 // track send packet in connection struct 668 hci_connection_t *connection = hci_connection_for_handle( con_handle); 669 if (!connection) { 670 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 671 hci_release_packet_buffer(); 672 return 0; 673 } 674 connection->num_sco_packets_sent++; 675 } 676 677 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 678 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 679 680 if (hci_transport_synchronous()){ 681 hci_release_packet_buffer(); 682 // notify upper stack that it might be possible to send again 683 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 684 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 685 } 686 687 return err; 688 } 689 #endif 690 691 static void acl_handler(uint8_t *packet, int size){ 692 693 // log_info("acl_handler: size %u", size); 694 695 // get info 696 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 697 hci_connection_t *conn = hci_connection_for_handle(con_handle); 698 uint8_t acl_flags = READ_ACL_FLAGS(packet); 699 uint16_t acl_length = READ_ACL_LENGTH(packet); 700 701 // ignore non-registered handle 702 if (!conn){ 703 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 704 return; 705 } 706 707 // assert packet is complete 708 if (acl_length + 4 != size){ 709 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 710 return; 711 } 712 713 #ifdef ENABLE_CLASSIC 714 // update idle timestamp 715 hci_connection_timestamp(conn); 716 #endif 717 718 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 719 hci_stack->host_completed_packets = 1; 720 conn->num_packets_completed++; 721 #endif 722 723 // handle different packet types 724 switch (acl_flags & 0x03) { 725 726 case 0x01: // continuation fragment 727 728 // sanity checks 729 if (conn->acl_recombination_pos == 0) { 730 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 731 return; 732 } 733 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 734 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 735 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 736 conn->acl_recombination_pos = 0; 737 return; 738 } 739 740 // append fragment payload (header already stored) 741 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 742 conn->acl_recombination_pos += acl_length; 743 744 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 745 // conn->acl_recombination_pos, conn->acl_recombination_length); 746 747 // forward complete L2CAP packet if complete. 748 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 749 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 750 // reset recombination buffer 751 conn->acl_recombination_length = 0; 752 conn->acl_recombination_pos = 0; 753 } 754 break; 755 756 case 0x02: { // first fragment 757 758 // sanity check 759 if (conn->acl_recombination_pos) { 760 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 761 conn->acl_recombination_pos = 0; 762 } 763 764 // peek into L2CAP packet! 765 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 766 767 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 768 769 // compare fragment size to L2CAP packet size 770 if (acl_length >= l2cap_length + 4){ 771 // forward fragment as L2CAP packet 772 hci_emit_acl_packet(packet, acl_length + 4); 773 } else { 774 775 if (acl_length > HCI_ACL_BUFFER_SIZE){ 776 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 777 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 778 return; 779 } 780 781 // store first fragment and tweak acl length for complete package 782 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 783 conn->acl_recombination_pos = acl_length + 4; 784 conn->acl_recombination_length = l2cap_length; 785 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 786 } 787 break; 788 789 } 790 default: 791 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 792 return; 793 } 794 795 // execute main loop 796 hci_run(); 797 } 798 799 static void hci_shutdown_connection(hci_connection_t *conn){ 800 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 801 802 #ifdef ENABLE_CLASSIC 803 #ifdef ENABLE_SCO_OVER_HCI 804 int addr_type = conn->address_type; 805 #endif 806 #endif 807 808 btstack_run_loop_remove_timer(&conn->timeout); 809 810 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 811 btstack_memory_hci_connection_free( conn ); 812 813 // now it's gone 814 hci_emit_nr_connections_changed(); 815 816 #ifdef ENABLE_CLASSIC 817 #ifdef ENABLE_SCO_OVER_HCI 818 // update SCO 819 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 820 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 821 } 822 #endif 823 #endif 824 } 825 826 #ifdef ENABLE_CLASSIC 827 828 static const uint16_t packet_type_sizes[] = { 829 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 830 HCI_ACL_DH1_SIZE, 0, 0, 0, 831 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 832 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 833 }; 834 static const uint8_t packet_type_feature_requirement_bit[] = { 835 0, // 3 slot packets 836 1, // 5 slot packets 837 25, // EDR 2 mpbs 838 26, // EDR 3 mbps 839 39, // 3 slot EDR packts 840 40, // 5 slot EDR packet 841 }; 842 static const uint16_t packet_type_feature_packet_mask[] = { 843 0x0f00, // 3 slot packets 844 0xf000, // 5 slot packets 845 0x1102, // EDR 2 mpbs 846 0x2204, // EDR 3 mbps 847 0x0300, // 3 slot EDR packts 848 0x3000, // 5 slot EDR packet 849 }; 850 851 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 852 // enable packet types based on size 853 uint16_t packet_types = 0; 854 unsigned int i; 855 for (i=0;i<16;i++){ 856 if (packet_type_sizes[i] == 0) continue; 857 if (packet_type_sizes[i] <= buffer_size){ 858 packet_types |= 1 << i; 859 } 860 } 861 // disable packet types due to missing local supported features 862 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 863 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 864 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 865 if (feature_set) continue; 866 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 867 packet_types &= ~packet_type_feature_packet_mask[i]; 868 } 869 // flip bits for "may not be used" 870 packet_types ^= 0x3306; 871 return packet_types; 872 } 873 874 uint16_t hci_usable_acl_packet_types(void){ 875 return hci_stack->packet_types; 876 } 877 #endif 878 879 uint8_t* hci_get_outgoing_packet_buffer(void){ 880 // hci packet buffer is >= acl data packet length 881 return hci_stack->hci_packet_buffer; 882 } 883 884 uint16_t hci_max_acl_data_packet_length(void){ 885 return hci_stack->acl_data_packet_length; 886 } 887 888 #ifdef ENABLE_CLASSIC 889 int hci_extended_sco_link_supported(void){ 890 // No. 31, byte 3, bit 7 891 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 892 } 893 #endif 894 895 int hci_non_flushable_packet_boundary_flag_supported(void){ 896 // No. 54, byte 6, bit 6 897 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 898 } 899 900 static int gap_ssp_supported(void){ 901 // No. 51, byte 6, bit 3 902 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 903 } 904 905 static int hci_classic_supported(void){ 906 #ifdef ENABLE_CLASSIC 907 // No. 37, byte 4, bit 5, = No BR/EDR Support 908 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 909 #else 910 return 0; 911 #endif 912 } 913 914 static int hci_le_supported(void){ 915 #ifdef ENABLE_BLE 916 // No. 37, byte 4, bit 6 = LE Supported (Controller) 917 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 918 #else 919 return 0; 920 #endif 921 } 922 923 #ifdef ENABLE_BLE 924 925 /** 926 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 927 */ 928 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 929 *addr_type = hci_stack->le_own_addr_type; 930 if (hci_stack->le_own_addr_type){ 931 memcpy(addr, hci_stack->le_random_address, 6); 932 } else { 933 memcpy(addr, hci_stack->local_bd_addr, 6); 934 } 935 } 936 937 #ifdef ENABLE_LE_CENTRAL 938 void le_handle_advertisement_report(uint8_t *packet, int size){ 939 940 UNUSED(size); 941 942 int offset = 3; 943 int num_reports = packet[offset]; 944 offset += 1; 945 946 int i; 947 // log_info("HCI: handle adv report with num reports: %d", num_reports); 948 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 949 for (i=0; i<num_reports;i++){ 950 uint8_t data_length = packet[offset + 8]; 951 uint8_t event_size = 10 + data_length; 952 int pos = 0; 953 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 954 event[pos++] = event_size; 955 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 956 offset += 8; 957 pos += 8; 958 event[pos++] = packet[offset + 1 + data_length]; // rssi 959 event[pos++] = packet[offset++]; //data_length; 960 memcpy(&event[pos], &packet[offset], data_length); 961 pos += data_length; 962 offset += data_length + 1; // rssi 963 hci_emit_event(event, pos, 1); 964 } 965 } 966 #endif 967 #endif 968 969 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 970 971 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 972 if (!hci_stack->config) return 0; 973 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 974 // Limit baud rate for Broadcom chipsets to 3 mbps 975 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 976 baud_rate = 3000000; 977 } 978 return baud_rate; 979 } 980 981 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 982 UNUSED(ds); 983 984 switch (hci_stack->substate){ 985 case HCI_INIT_W4_SEND_RESET: 986 log_info("Resend HCI Reset"); 987 hci_stack->substate = HCI_INIT_SEND_RESET; 988 hci_stack->num_cmd_packets = 1; 989 hci_run(); 990 break; 991 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 992 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 993 if (hci_stack->hci_transport->reset_link){ 994 hci_stack->hci_transport->reset_link(); 995 } 996 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 997 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 998 log_info("Resend HCI Reset - CSR Warm Boot"); 999 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1000 hci_stack->num_cmd_packets = 1; 1001 hci_run(); 1002 break; 1003 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1004 if (hci_stack->hci_transport->set_baudrate){ 1005 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1006 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1007 hci_stack->hci_transport->set_baudrate(baud_rate); 1008 } 1009 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1010 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1011 if (hci_stack->hci_transport->reset_link){ 1012 log_info("Link Reset"); 1013 hci_stack->hci_transport->reset_link(); 1014 } 1015 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1016 hci_run(); 1017 } 1018 break; 1019 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1020 // otherwise continue 1021 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1022 hci_send_cmd(&hci_read_local_supported_commands); 1023 break; 1024 default: 1025 break; 1026 } 1027 } 1028 #endif 1029 1030 static void hci_initializing_next_state(void){ 1031 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1032 } 1033 1034 // assumption: hci_can_send_command_packet_now() == true 1035 static void hci_initializing_run(void){ 1036 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1037 switch (hci_stack->substate){ 1038 case HCI_INIT_SEND_RESET: 1039 hci_state_reset(); 1040 1041 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1042 // prepare reset if command complete not received in 100ms 1043 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1044 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1045 btstack_run_loop_add_timer(&hci_stack->timeout); 1046 #endif 1047 // send command 1048 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1049 hci_send_cmd(&hci_reset); 1050 break; 1051 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1052 hci_send_cmd(&hci_read_local_version_information); 1053 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1054 break; 1055 case HCI_INIT_SEND_READ_LOCAL_NAME: 1056 hci_send_cmd(&hci_read_local_name); 1057 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1058 break; 1059 1060 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1061 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1062 hci_state_reset(); 1063 // prepare reset if command complete not received in 100ms 1064 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1065 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1066 btstack_run_loop_add_timer(&hci_stack->timeout); 1067 // send command 1068 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1069 hci_send_cmd(&hci_reset); 1070 break; 1071 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1072 hci_state_reset(); 1073 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1074 hci_send_cmd(&hci_reset); 1075 break; 1076 case HCI_INIT_SEND_BAUD_CHANGE: { 1077 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1078 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1079 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1080 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1081 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1082 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1083 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1084 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1085 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1086 btstack_run_loop_add_timer(&hci_stack->timeout); 1087 } 1088 break; 1089 } 1090 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1091 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1092 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1093 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1094 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1095 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1096 break; 1097 } 1098 case HCI_INIT_CUSTOM_INIT: 1099 // Custom initialization 1100 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1101 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1102 if (valid_cmd){ 1103 int size = 3 + hci_stack->hci_packet_buffer[2]; 1104 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1105 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1106 switch (valid_cmd) { 1107 case 1: 1108 default: 1109 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1110 break; 1111 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1112 log_info("CSR Warm Boot"); 1113 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1114 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1115 btstack_run_loop_add_timer(&hci_stack->timeout); 1116 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1117 && hci_stack->config 1118 && hci_stack->chipset 1119 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1120 && hci_stack->hci_transport->set_baudrate 1121 && hci_transport_uart_get_main_baud_rate()){ 1122 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1123 } else { 1124 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1125 } 1126 break; 1127 } 1128 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1129 break; 1130 } 1131 log_info("Init script done"); 1132 1133 // Init script download on Broadcom chipsets causes: 1134 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1135 // - baud rate to reset, restore UART baud rate if needed 1136 int need_baud_change = hci_stack->config 1137 && hci_stack->chipset 1138 && hci_stack->chipset->set_baudrate_command 1139 && hci_stack->hci_transport->set_baudrate 1140 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1141 if (need_baud_change) { 1142 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1143 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1144 hci_stack->hci_transport->set_baudrate(baud_rate); 1145 } 1146 1147 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1148 // -> Work around: wait a few milliseconds here. 1149 log_info("BCM delay after init script"); 1150 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1151 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1152 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1153 btstack_run_loop_add_timer(&hci_stack->timeout); 1154 break; 1155 } 1156 } 1157 // otherwise continue 1158 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1159 hci_send_cmd(&hci_read_local_supported_commands); 1160 break; 1161 case HCI_INIT_SET_BD_ADDR: 1162 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1163 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1164 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1165 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1166 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1167 break; 1168 #endif 1169 1170 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1171 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1172 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1173 hci_send_cmd(&hci_read_local_supported_commands); 1174 break; 1175 case HCI_INIT_READ_BD_ADDR: 1176 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1177 hci_send_cmd(&hci_read_bd_addr); 1178 break; 1179 case HCI_INIT_READ_BUFFER_SIZE: 1180 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1181 hci_send_cmd(&hci_read_buffer_size); 1182 break; 1183 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1184 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1185 hci_send_cmd(&hci_read_local_supported_features); 1186 break; 1187 1188 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1189 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1190 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1191 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1192 break; 1193 case HCI_INIT_HOST_BUFFER_SIZE: 1194 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1195 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1196 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1197 break; 1198 #endif 1199 1200 case HCI_INIT_SET_EVENT_MASK: 1201 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1202 if (hci_le_supported()){ 1203 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1204 } else { 1205 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1206 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1207 } 1208 break; 1209 1210 #ifdef ENABLE_CLASSIC 1211 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1212 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1213 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1214 break; 1215 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1216 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1217 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1218 break; 1219 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1220 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1221 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1222 break; 1223 case HCI_INIT_WRITE_LOCAL_NAME: 1224 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1225 if (hci_stack->local_name){ 1226 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1227 } else { 1228 char local_name[8+17+1]; 1229 // BTstack 11:22:33:44:55:66 1230 memcpy(local_name, "BTstack ", 8); 1231 memcpy(&local_name[8], bd_addr_to_str(hci_stack->local_bd_addr), 17); // strlen(bd_addr_to_str(...)) = 17 1232 local_name[8+17] = '\0'; 1233 log_info("---> Name %s", local_name); 1234 hci_send_cmd(&hci_write_local_name, local_name); 1235 } 1236 break; 1237 case HCI_INIT_WRITE_EIR_DATA: 1238 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1239 hci_send_cmd(&hci_write_extended_inquiry_response, 0, hci_stack->eir_data); 1240 break; 1241 case HCI_INIT_WRITE_INQUIRY_MODE: 1242 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1243 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1244 break; 1245 case HCI_INIT_WRITE_SCAN_ENABLE: 1246 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1247 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1248 break; 1249 // only sent if ENABLE_SCO_OVER_HCI is defined 1250 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1251 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1252 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1253 break; 1254 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1255 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1256 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1257 break; 1258 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1259 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1260 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1261 log_info("BCM: Route SCO data via HCI transport"); 1262 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1263 break; 1264 1265 #endif 1266 #ifdef ENABLE_BLE 1267 // LE INIT 1268 case HCI_INIT_LE_READ_BUFFER_SIZE: 1269 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1270 hci_send_cmd(&hci_le_read_buffer_size); 1271 break; 1272 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1273 // LE Supported Host = 1, Simultaneous Host = 0 1274 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1275 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1276 break; 1277 #ifdef ENABLE_LE_CENTRAL 1278 case HCI_INIT_READ_WHITE_LIST_SIZE: 1279 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1280 hci_send_cmd(&hci_le_read_white_list_size); 1281 break; 1282 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1283 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1284 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1285 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1286 break; 1287 #endif 1288 #endif 1289 default: 1290 return; 1291 } 1292 } 1293 1294 static void hci_init_done(void){ 1295 // done. tell the app 1296 log_info("hci_init_done -> HCI_STATE_WORKING"); 1297 hci_stack->state = HCI_STATE_WORKING; 1298 hci_emit_state(); 1299 hci_run(); 1300 } 1301 1302 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1303 UNUSED(size); 1304 1305 uint8_t command_completed = 0; 1306 1307 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1308 uint16_t opcode = little_endian_read_16(packet,3); 1309 if (opcode == hci_stack->last_cmd_opcode){ 1310 command_completed = 1; 1311 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1312 } else { 1313 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1314 } 1315 } 1316 1317 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1318 uint8_t status = packet[2]; 1319 uint16_t opcode = little_endian_read_16(packet,4); 1320 if (opcode == hci_stack->last_cmd_opcode){ 1321 if (status){ 1322 command_completed = 1; 1323 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1324 } else { 1325 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1326 } 1327 } else { 1328 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1329 } 1330 } 1331 1332 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1333 1334 // Vendor == CSR 1335 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1336 // TODO: track actual command 1337 command_completed = 1; 1338 } 1339 1340 // Vendor == Toshiba 1341 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1342 // TODO: track actual command 1343 command_completed = 1; 1344 } 1345 1346 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1347 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1348 // 1349 // HCI Reset 1350 // Timeout 100 ms 1351 // HCI Reset 1352 // Command Complete Reset 1353 // HCI Read Local Version Information 1354 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1355 // hang... 1356 // 1357 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1358 if (!command_completed 1359 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1360 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1361 1362 uint16_t opcode = little_endian_read_16(packet,3); 1363 if (opcode == hci_reset.opcode){ 1364 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1365 return; 1366 } 1367 } 1368 1369 // CSR & H5 1370 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1371 if (!command_completed 1372 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1373 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1374 1375 uint16_t opcode = little_endian_read_16(packet,3); 1376 if (opcode == hci_reset.opcode){ 1377 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1378 return; 1379 } 1380 } 1381 1382 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1383 // fix: Correct substate and behave as command below 1384 if (command_completed){ 1385 switch (hci_stack->substate){ 1386 case HCI_INIT_SEND_RESET: 1387 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1388 break; 1389 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1390 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1391 break; 1392 default: 1393 break; 1394 } 1395 } 1396 1397 #endif 1398 1399 if (!command_completed) return; 1400 1401 int need_baud_change = 0; 1402 int need_addr_change = 0; 1403 1404 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1405 need_baud_change = hci_stack->config 1406 && hci_stack->chipset 1407 && hci_stack->chipset->set_baudrate_command 1408 && hci_stack->hci_transport->set_baudrate 1409 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1410 1411 need_addr_change = hci_stack->custom_bd_addr_set 1412 && hci_stack->chipset 1413 && hci_stack->chipset->set_bd_addr_command; 1414 #endif 1415 1416 switch(hci_stack->substate){ 1417 1418 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1419 case HCI_INIT_SEND_RESET: 1420 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1421 // fix: just correct substate and behave as command below 1422 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1423 btstack_run_loop_remove_timer(&hci_stack->timeout); 1424 break; 1425 case HCI_INIT_W4_SEND_RESET: 1426 btstack_run_loop_remove_timer(&hci_stack->timeout); 1427 break; 1428 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1429 log_info("Received local name, need baud change %d", need_baud_change); 1430 if (need_baud_change){ 1431 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1432 return; 1433 } 1434 // skip baud change 1435 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1436 return; 1437 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1438 // for STLC2500D, baud rate change already happened. 1439 // for others, baud rate gets changed now 1440 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1441 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1442 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1443 hci_stack->hci_transport->set_baudrate(baud_rate); 1444 } 1445 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1446 return; 1447 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1448 btstack_run_loop_remove_timer(&hci_stack->timeout); 1449 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1450 return; 1451 case HCI_INIT_W4_CUSTOM_INIT: 1452 // repeat custom init 1453 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1454 return; 1455 #else 1456 case HCI_INIT_W4_SEND_RESET: 1457 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1458 return ; 1459 #endif 1460 1461 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1462 if (need_baud_change && hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION){ 1463 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1464 return; 1465 } 1466 if (need_addr_change){ 1467 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1468 return; 1469 } 1470 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1471 return; 1472 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1473 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1474 if (need_baud_change){ 1475 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1476 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1477 hci_stack->hci_transport->set_baudrate(baud_rate); 1478 } 1479 if (need_addr_change){ 1480 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1481 return; 1482 } 1483 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1484 return; 1485 case HCI_INIT_W4_SET_BD_ADDR: 1486 // for STLC2500D, bd addr change only gets active after sending reset command 1487 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1488 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1489 return; 1490 } 1491 // skipping st warm boot 1492 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1493 return; 1494 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1495 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1496 return; 1497 #endif 1498 case HCI_INIT_W4_READ_BD_ADDR: 1499 // only read buffer size if supported 1500 if (hci_stack->local_supported_commands[0] & 0x01) { 1501 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1502 return; 1503 } 1504 // skipping read buffer size 1505 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1506 return; 1507 case HCI_INIT_W4_SET_EVENT_MASK: 1508 // skip Classic init commands for LE only chipsets 1509 if (!hci_classic_supported()){ 1510 #ifdef ENABLE_BLE 1511 if (hci_le_supported()){ 1512 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1513 return; 1514 } 1515 #endif 1516 log_error("Neither BR/EDR nor LE supported"); 1517 hci_init_done(); 1518 return; 1519 } 1520 if (!gap_ssp_supported()){ 1521 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1522 return; 1523 } 1524 break; 1525 #ifdef ENABLE_BLE 1526 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1527 // skip write le host if not supported (e.g. on LE only EM9301) 1528 if (hci_stack->local_supported_commands[0] & 0x02) break; 1529 #ifdef ENABLE_LE_CENTRAL 1530 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1531 #else 1532 hci_init_done(); 1533 #endif 1534 return; 1535 #endif 1536 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1537 // skip write eir data if no eir data set 1538 if (hci_stack->eir_data) break; 1539 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1540 return; 1541 1542 #ifdef ENABLE_SCO_OVER_HCI 1543 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1544 // skip write synchronous flow control if not supported 1545 if (hci_stack->local_supported_commands[0] & 0x04) break; 1546 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1547 // explicit fall through to reduce repetitions 1548 1549 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1550 // skip write default erroneous data reporting if not supported 1551 if (hci_stack->local_supported_commands[0] & 0x08) break; 1552 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1553 // explicit fall through to reduce repetitions 1554 1555 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1556 // skip bcm set sco pcm config on non-Broadcom chipsets 1557 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1558 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1559 // explicit fall through to reduce repetitions 1560 1561 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1562 if (!hci_le_supported()){ 1563 // SKIP LE init for Classic only configuration 1564 hci_init_done(); 1565 return; 1566 } 1567 break; 1568 1569 #else /* !ENABLE_SCO_OVER_HCI */ 1570 1571 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1572 #ifdef ENABLE_BLE 1573 if (hci_le_supported()){ 1574 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1575 return; 1576 } 1577 #endif 1578 // SKIP LE init for Classic only configuration 1579 hci_init_done(); 1580 return; 1581 #endif /* ENABLE_SCO_OVER_HCI */ 1582 1583 // Response to command before init done state -> init done 1584 case (HCI_INIT_DONE-1): 1585 hci_init_done(); 1586 return; 1587 1588 default: 1589 break; 1590 } 1591 hci_initializing_next_state(); 1592 } 1593 1594 static void event_handler(uint8_t *packet, int size){ 1595 1596 uint16_t event_length = packet[1]; 1597 1598 // assert packet is complete 1599 if (size != event_length + 2){ 1600 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1601 return; 1602 } 1603 1604 bd_addr_t addr; 1605 bd_addr_type_t addr_type; 1606 uint8_t link_type; 1607 hci_con_handle_t handle; 1608 hci_connection_t * conn; 1609 int i; 1610 1611 // warnings 1612 (void) link_type; 1613 1614 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1615 1616 switch (hci_event_packet_get_type(packet)) { 1617 1618 case HCI_EVENT_COMMAND_COMPLETE: 1619 // get num cmd packets - limit to 1 to reduce complexity 1620 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1621 1622 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1623 if (packet[5]) break; 1624 // terminate, name 248 chars 1625 packet[6+248] = 0; 1626 log_info("local name: %s", &packet[6]); 1627 } 1628 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1629 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1630 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1631 uint16_t acl_len = little_endian_read_16(packet, 6); 1632 uint16_t sco_len = packet[8]; 1633 1634 // determine usable ACL/SCO payload size 1635 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1636 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1637 1638 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1639 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1640 1641 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1642 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1643 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1644 } 1645 } 1646 #ifdef ENABLE_BLE 1647 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1648 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1649 hci_stack->le_acl_packets_total_num = packet[8]; 1650 // determine usable ACL payload size 1651 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1652 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1653 } 1654 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1655 } 1656 #ifdef ENABLE_LE_CENTRAL 1657 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1658 hci_stack->le_whitelist_capacity = packet[6]; 1659 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1660 } 1661 #endif 1662 #endif 1663 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1664 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1665 hci_stack->local_bd_addr); 1666 log_info("Local Address, Status: 0x%02x: Addr: %s", 1667 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1668 #ifdef ENABLE_CLASSIC 1669 if (hci_stack->link_key_db){ 1670 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1671 } 1672 #endif 1673 } 1674 #ifdef ENABLE_CLASSIC 1675 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1676 hci_emit_discoverable_enabled(hci_stack->discoverable); 1677 } 1678 #endif 1679 1680 // Note: HCI init checks 1681 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1682 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1683 1684 #ifdef ENABLE_CLASSIC 1685 // determine usable ACL packet types based on host buffer size and supported features 1686 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1687 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1688 #endif 1689 // Classic/LE 1690 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1691 } 1692 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1693 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1694 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1695 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1696 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1697 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1698 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1699 } 1700 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1701 hci_stack->local_supported_commands[0] = 1702 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1703 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1704 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1705 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08); // bit 3 = Octet 18, bit 3 1706 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1707 } 1708 #ifdef ENABLE_CLASSIC 1709 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1710 if (packet[5] == 0){ 1711 hci_stack->synchronous_flow_control_enabled = 1; 1712 } 1713 } 1714 #endif 1715 break; 1716 1717 case HCI_EVENT_COMMAND_STATUS: 1718 // get num cmd packets - limit to 1 to reduce complexity 1719 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1720 break; 1721 1722 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1723 int offset = 3; 1724 for (i=0; i<packet[2];i++){ 1725 handle = little_endian_read_16(packet, offset); 1726 offset += 2; 1727 uint16_t num_packets = little_endian_read_16(packet, offset); 1728 offset += 2; 1729 1730 conn = hci_connection_for_handle(handle); 1731 if (!conn){ 1732 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1733 continue; 1734 } 1735 1736 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1737 #ifdef ENABLE_CLASSIC 1738 if (conn->num_sco_packets_sent >= num_packets){ 1739 conn->num_sco_packets_sent -= num_packets; 1740 } else { 1741 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1742 conn->num_sco_packets_sent = 0; 1743 } 1744 hci_notify_if_sco_can_send_now(); 1745 #endif 1746 } else { 1747 if (conn->num_acl_packets_sent >= num_packets){ 1748 conn->num_acl_packets_sent -= num_packets; 1749 } else { 1750 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1751 conn->num_acl_packets_sent = 0; 1752 } 1753 } 1754 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1755 } 1756 break; 1757 } 1758 1759 #ifdef ENABLE_CLASSIC 1760 case HCI_EVENT_CONNECTION_REQUEST: 1761 reverse_bd_addr(&packet[2], addr); 1762 // TODO: eval COD 8-10 1763 link_type = packet[11]; 1764 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1765 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1766 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1767 if (!conn) { 1768 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1769 } 1770 if (!conn) { 1771 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1772 hci_stack->decline_reason = 0x0d; 1773 bd_addr_copy(hci_stack->decline_addr, addr); 1774 break; 1775 } 1776 conn->role = HCI_ROLE_SLAVE; 1777 conn->state = RECEIVED_CONNECTION_REQUEST; 1778 // store info about eSCO 1779 if (link_type == 0x02){ 1780 conn->remote_supported_feature_eSCO = 1; 1781 } 1782 hci_run(); 1783 break; 1784 1785 case HCI_EVENT_CONNECTION_COMPLETE: 1786 // Connection management 1787 reverse_bd_addr(&packet[5], addr); 1788 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1789 addr_type = BD_ADDR_TYPE_CLASSIC; 1790 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1791 if (conn) { 1792 if (!packet[2]){ 1793 conn->state = OPEN; 1794 conn->con_handle = little_endian_read_16(packet, 3); 1795 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1796 1797 // restart timer 1798 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1799 btstack_run_loop_add_timer(&conn->timeout); 1800 1801 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1802 1803 hci_emit_nr_connections_changed(); 1804 } else { 1805 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1806 uint8_t status = packet[2]; 1807 bd_addr_t bd_address; 1808 memcpy(&bd_address, conn->address, 6); 1809 1810 // connection failed, remove entry 1811 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1812 btstack_memory_hci_connection_free( conn ); 1813 1814 // notify client if dedicated bonding 1815 if (notify_dedicated_bonding_failed){ 1816 log_info("hci notify_dedicated_bonding_failed"); 1817 hci_emit_dedicated_bonding_result(bd_address, status); 1818 } 1819 1820 // if authentication error, also delete link key 1821 if (packet[2] == 0x05) { 1822 gap_drop_link_key_for_bd_addr(addr); 1823 } 1824 } 1825 } 1826 break; 1827 1828 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1829 reverse_bd_addr(&packet[5], addr); 1830 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1831 if (packet[2]){ 1832 // connection failed 1833 break; 1834 } 1835 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1836 if (!conn) { 1837 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1838 } 1839 if (!conn) { 1840 break; 1841 } 1842 conn->state = OPEN; 1843 conn->con_handle = little_endian_read_16(packet, 3); 1844 1845 #ifdef ENABLE_SCO_OVER_HCI 1846 // update SCO 1847 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 1848 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1849 } 1850 #endif 1851 break; 1852 1853 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1854 handle = little_endian_read_16(packet, 3); 1855 conn = hci_connection_for_handle(handle); 1856 if (!conn) break; 1857 if (!packet[2]){ 1858 uint8_t * features = &packet[5]; 1859 if (features[6] & (1 << 3)){ 1860 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1861 } 1862 if (features[3] & (1<<7)){ 1863 conn->remote_supported_feature_eSCO = 1; 1864 } 1865 } 1866 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1867 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1868 if (conn->bonding_flags & BONDING_DEDICATED){ 1869 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1870 } 1871 break; 1872 1873 case HCI_EVENT_LINK_KEY_REQUEST: 1874 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1875 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1876 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1877 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1878 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1879 hci_run(); 1880 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1881 return; 1882 1883 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1884 reverse_bd_addr(&packet[2], addr); 1885 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1886 if (!conn) break; 1887 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1888 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1889 // Change Connection Encryption keeps link key type 1890 if (link_key_type != CHANGED_COMBINATION_KEY){ 1891 conn->link_key_type = link_key_type; 1892 } 1893 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1894 // still forward event to allow dismiss of pairing dialog 1895 break; 1896 } 1897 1898 case HCI_EVENT_PIN_CODE_REQUEST: 1899 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1900 // non-bondable mode: pin code negative reply will be sent 1901 if (!hci_stack->bondable){ 1902 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1903 hci_run(); 1904 return; 1905 } 1906 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1907 if (!hci_stack->link_key_db) break; 1908 hci_event_pin_code_request_get_bd_addr(packet, addr); 1909 hci_stack->link_key_db->delete_link_key(addr); 1910 break; 1911 1912 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1913 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1914 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1915 break; 1916 1917 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1918 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1919 if (!hci_stack->ssp_auto_accept) break; 1920 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1921 break; 1922 1923 case HCI_EVENT_USER_PASSKEY_REQUEST: 1924 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1925 if (!hci_stack->ssp_auto_accept) break; 1926 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1927 break; 1928 #endif 1929 1930 case HCI_EVENT_ENCRYPTION_CHANGE: 1931 handle = little_endian_read_16(packet, 3); 1932 conn = hci_connection_for_handle(handle); 1933 if (!conn) break; 1934 if (packet[2] == 0) { 1935 if (packet[5]){ 1936 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1937 } else { 1938 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1939 } 1940 } 1941 #ifdef ENABLE_CLASSIC 1942 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1943 #endif 1944 break; 1945 1946 #ifdef ENABLE_CLASSIC 1947 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1948 handle = little_endian_read_16(packet, 3); 1949 conn = hci_connection_for_handle(handle); 1950 if (!conn) break; 1951 1952 // dedicated bonding: send result and disconnect 1953 if (conn->bonding_flags & BONDING_DEDICATED){ 1954 conn->bonding_flags &= ~BONDING_DEDICATED; 1955 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1956 conn->bonding_status = packet[2]; 1957 break; 1958 } 1959 1960 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1961 // link key sufficient for requested security 1962 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1963 break; 1964 } 1965 // not enough 1966 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1967 break; 1968 #endif 1969 1970 // HCI_EVENT_DISCONNECTION_COMPLETE 1971 // has been split, to first notify stack before shutting connection down 1972 // see end of function, too. 1973 case HCI_EVENT_DISCONNECTION_COMPLETE: 1974 if (packet[2]) break; // status != 0 1975 handle = little_endian_read_16(packet, 3); 1976 // drop outgoing ACL fragments if it is for closed connection 1977 if (hci_stack->acl_fragmentation_total_size > 0) { 1978 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 1979 log_info("hci: drop fragmented ACL data for closed connection"); 1980 hci_stack->acl_fragmentation_total_size = 0; 1981 hci_stack->acl_fragmentation_pos = 0; 1982 } 1983 } 1984 1985 // re-enable advertisements for le connections if active 1986 conn = hci_connection_for_handle(handle); 1987 if (!conn) break; 1988 #ifdef ENABLE_BLE 1989 #ifdef ENABLE_LE_PERIPHERAL 1990 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1991 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1992 } 1993 #endif 1994 #endif 1995 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1996 break; 1997 1998 case HCI_EVENT_HARDWARE_ERROR: 1999 log_error("Hardware Error: 0x%02x", packet[2]); 2000 if (hci_stack->hardware_error_callback){ 2001 (*hci_stack->hardware_error_callback)(packet[2]); 2002 } else { 2003 // if no special requests, just reboot stack 2004 hci_power_control_off(); 2005 hci_power_control_on(); 2006 } 2007 break; 2008 2009 #ifdef ENABLE_CLASSIC 2010 case HCI_EVENT_ROLE_CHANGE: 2011 if (packet[2]) break; // status != 0 2012 handle = little_endian_read_16(packet, 3); 2013 conn = hci_connection_for_handle(handle); 2014 if (!conn) break; // no conn 2015 conn->role = packet[9]; 2016 break; 2017 #endif 2018 2019 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2020 // release packet buffer only for asynchronous transport and if there are not further fragements 2021 if (hci_transport_synchronous()) { 2022 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2023 return; // instead of break: to avoid re-entering hci_run() 2024 } 2025 if (hci_stack->acl_fragmentation_total_size) break; 2026 hci_release_packet_buffer(); 2027 2028 // L2CAP receives this event via the hci_emit_event below 2029 2030 #ifdef ENABLE_CLASSIC 2031 // For SCO, we do the can_send_now_check here 2032 hci_notify_if_sco_can_send_now(); 2033 #endif 2034 break; 2035 2036 #ifdef ENABLE_CLASSIC 2037 case HCI_EVENT_SCO_CAN_SEND_NOW: 2038 // For SCO, we do the can_send_now_check here 2039 hci_notify_if_sco_can_send_now(); 2040 return; 2041 2042 // explode inquriy results for easier consumption 2043 case HCI_EVENT_INQUIRY_RESULT: 2044 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2045 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2046 gap_inquiry_explode(packet); 2047 break; 2048 #endif 2049 2050 #ifdef ENABLE_BLE 2051 case HCI_EVENT_LE_META: 2052 switch (packet[2]){ 2053 #ifdef ENABLE_LE_CENTRAL 2054 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2055 // log_info("advertising report received"); 2056 if (hci_stack->le_scanning_state != LE_SCANNING) break; 2057 le_handle_advertisement_report(packet, size); 2058 break; 2059 #endif 2060 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2061 // Connection management 2062 reverse_bd_addr(&packet[8], addr); 2063 addr_type = (bd_addr_type_t)packet[7]; 2064 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2065 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2066 #ifdef ENABLE_LE_CENTRAL 2067 // if auto-connect, remove from whitelist in both roles 2068 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2069 hci_remove_from_whitelist(addr_type, addr); 2070 } 2071 // handle error: error is reported only to the initiator -> outgoing connection 2072 if (packet[3]){ 2073 // outgoing connection establishment is done 2074 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2075 // remove entry 2076 if (conn){ 2077 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2078 btstack_memory_hci_connection_free( conn ); 2079 } 2080 break; 2081 } 2082 #endif 2083 // on success, both hosts receive connection complete event 2084 if (packet[6] == HCI_ROLE_MASTER){ 2085 #ifdef ENABLE_LE_CENTRAL 2086 // if we're master, it was an outgoing connection and we're done with it 2087 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2088 #endif 2089 } else { 2090 #ifdef ENABLE_LE_PERIPHERAL 2091 // if we're slave, it was an incoming connection, advertisements have stopped 2092 hci_stack->le_advertisements_active = 0; 2093 // try to re-enable them 2094 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 2095 #endif 2096 } 2097 // LE connections are auto-accepted, so just create a connection if there isn't one already 2098 if (!conn){ 2099 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2100 } 2101 // no memory, sorry. 2102 if (!conn){ 2103 break; 2104 } 2105 2106 conn->state = OPEN; 2107 conn->role = packet[6]; 2108 conn->con_handle = little_endian_read_16(packet, 4); 2109 2110 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2111 2112 // restart timer 2113 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2114 // btstack_run_loop_add_timer(&conn->timeout); 2115 2116 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2117 2118 hci_emit_nr_connections_changed(); 2119 break; 2120 2121 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2122 2123 default: 2124 break; 2125 } 2126 break; 2127 #endif 2128 default: 2129 break; 2130 } 2131 2132 // handle BT initialization 2133 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2134 hci_initializing_event_handler(packet, size); 2135 } 2136 2137 // help with BT sleep 2138 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2139 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2140 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2141 hci_initializing_next_state(); 2142 } 2143 2144 // notify upper stack 2145 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2146 2147 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2148 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2149 if (!packet[2]){ 2150 handle = little_endian_read_16(packet, 3); 2151 hci_connection_t * aConn = hci_connection_for_handle(handle); 2152 if (aConn) { 2153 uint8_t status = aConn->bonding_status; 2154 uint16_t flags = aConn->bonding_flags; 2155 bd_addr_t bd_address; 2156 memcpy(&bd_address, aConn->address, 6); 2157 hci_shutdown_connection(aConn); 2158 // connection struct is gone, don't access anymore 2159 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2160 hci_emit_dedicated_bonding_result(bd_address, status); 2161 } 2162 } 2163 } 2164 } 2165 2166 // execute main loop 2167 hci_run(); 2168 } 2169 2170 #ifdef ENABLE_CLASSIC 2171 static void sco_handler(uint8_t * packet, uint16_t size){ 2172 if (!hci_stack->sco_packet_handler) return; 2173 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2174 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2175 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2176 hci_connection_t *conn = hci_connection_for_handle(con_handle); 2177 if (conn){ 2178 conn->num_packets_completed++; 2179 hci_stack->host_completed_packets = 1; 2180 hci_run(); 2181 } 2182 #endif 2183 } 2184 #endif 2185 2186 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2187 hci_dump_packet(packet_type, 1, packet, size); 2188 switch (packet_type) { 2189 case HCI_EVENT_PACKET: 2190 event_handler(packet, size); 2191 break; 2192 case HCI_ACL_DATA_PACKET: 2193 acl_handler(packet, size); 2194 break; 2195 #ifdef ENABLE_CLASSIC 2196 case HCI_SCO_DATA_PACKET: 2197 sco_handler(packet, size); 2198 break; 2199 #endif 2200 default: 2201 break; 2202 } 2203 } 2204 2205 /** 2206 * @brief Add event packet handler. 2207 */ 2208 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2209 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2210 } 2211 2212 2213 /** Register HCI packet handlers */ 2214 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2215 hci_stack->acl_packet_handler = handler; 2216 } 2217 2218 #ifdef ENABLE_CLASSIC 2219 /** 2220 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2221 */ 2222 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2223 hci_stack->sco_packet_handler = handler; 2224 } 2225 #endif 2226 2227 static void hci_state_reset(void){ 2228 // no connections yet 2229 hci_stack->connections = NULL; 2230 2231 // keep discoverable/connectable as this has been requested by the client(s) 2232 // hci_stack->discoverable = 0; 2233 // hci_stack->connectable = 0; 2234 // hci_stack->bondable = 1; 2235 // hci_stack->own_addr_type = 0; 2236 2237 // buffer is free 2238 hci_stack->hci_packet_buffer_reserved = 0; 2239 2240 // no pending cmds 2241 hci_stack->decline_reason = 0; 2242 hci_stack->new_scan_enable_value = 0xff; 2243 2244 // LE 2245 #ifdef ENABLE_BLE 2246 memset(hci_stack->le_random_address, 0, 6); 2247 hci_stack->le_random_address_set = 0; 2248 #endif 2249 #ifdef ENABLE_LE_CENTRAL 2250 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2251 hci_stack->le_scan_type = 0xff; 2252 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2253 hci_stack->le_whitelist = 0; 2254 hci_stack->le_whitelist_capacity = 0; 2255 #endif 2256 2257 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2258 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2259 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2260 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2261 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2262 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2263 } 2264 2265 #ifdef ENABLE_CLASSIC 2266 /** 2267 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2268 */ 2269 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2270 // store and open remote device db 2271 hci_stack->link_key_db = link_key_db; 2272 if (hci_stack->link_key_db) { 2273 hci_stack->link_key_db->open(); 2274 } 2275 } 2276 #endif 2277 2278 void hci_init(const hci_transport_t *transport, const void *config){ 2279 2280 #ifdef HAVE_MALLOC 2281 if (!hci_stack) { 2282 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2283 } 2284 #else 2285 hci_stack = &hci_stack_static; 2286 #endif 2287 memset(hci_stack, 0, sizeof(hci_stack_t)); 2288 2289 // reference to use transport layer implementation 2290 hci_stack->hci_transport = transport; 2291 2292 // reference to used config 2293 hci_stack->config = config; 2294 2295 // setup pointer for outgoing packet buffer 2296 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2297 2298 // max acl payload size defined in config.h 2299 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2300 2301 // register packet handlers with transport 2302 transport->register_packet_handler(&packet_handler); 2303 2304 hci_stack->state = HCI_STATE_OFF; 2305 2306 // class of device 2307 hci_stack->class_of_device = 0x007a020c; // Smartphone 2308 2309 // bondable by default 2310 hci_stack->bondable = 1; 2311 2312 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2313 hci_stack->ssp_enable = 1; 2314 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2315 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2316 hci_stack->ssp_auto_accept = 1; 2317 2318 // voice setting - signed 16 bit pcm data with CVSD over the air 2319 hci_stack->sco_voice_setting = 0x60; 2320 2321 hci_state_reset(); 2322 } 2323 2324 /** 2325 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2326 */ 2327 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2328 hci_stack->chipset = chipset_driver; 2329 2330 // reset chipset driver - init is also called on power_up 2331 if (hci_stack->chipset && hci_stack->chipset->init){ 2332 hci_stack->chipset->init(hci_stack->config); 2333 } 2334 } 2335 2336 /** 2337 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2338 */ 2339 void hci_set_control(const btstack_control_t *hardware_control){ 2340 // references to used control implementation 2341 hci_stack->control = hardware_control; 2342 // init with transport config 2343 hardware_control->init(hci_stack->config); 2344 } 2345 2346 void hci_close(void){ 2347 // close remote device db 2348 if (hci_stack->link_key_db) { 2349 hci_stack->link_key_db->close(); 2350 } 2351 2352 btstack_linked_list_iterator_t lit; 2353 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2354 while (btstack_linked_list_iterator_has_next(&lit)){ 2355 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2356 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2357 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2358 hci_shutdown_connection(connection); 2359 } 2360 2361 hci_power_control(HCI_POWER_OFF); 2362 2363 #ifdef HAVE_MALLOC 2364 free(hci_stack); 2365 #endif 2366 hci_stack = NULL; 2367 } 2368 2369 #ifdef ENABLE_CLASSIC 2370 void gap_set_class_of_device(uint32_t class_of_device){ 2371 hci_stack->class_of_device = class_of_device; 2372 } 2373 2374 void hci_disable_l2cap_timeout_check(void){ 2375 disable_l2cap_timeouts = 1; 2376 } 2377 #endif 2378 2379 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2380 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2381 void hci_set_bd_addr(bd_addr_t addr){ 2382 memcpy(hci_stack->custom_bd_addr, addr, 6); 2383 hci_stack->custom_bd_addr_set = 1; 2384 } 2385 #endif 2386 2387 // State-Module-Driver overview 2388 // state module low-level 2389 // HCI_STATE_OFF off close 2390 // HCI_STATE_INITIALIZING, on open 2391 // HCI_STATE_WORKING, on open 2392 // HCI_STATE_HALTING, on open 2393 // HCI_STATE_SLEEPING, off/sleep close 2394 // HCI_STATE_FALLING_ASLEEP on open 2395 2396 static int hci_power_control_on(void){ 2397 2398 // power on 2399 int err = 0; 2400 if (hci_stack->control && hci_stack->control->on){ 2401 err = (*hci_stack->control->on)(); 2402 } 2403 if (err){ 2404 log_error( "POWER_ON failed"); 2405 hci_emit_hci_open_failed(); 2406 return err; 2407 } 2408 2409 // int chipset driver 2410 if (hci_stack->chipset && hci_stack->chipset->init){ 2411 hci_stack->chipset->init(hci_stack->config); 2412 } 2413 2414 // init transport 2415 if (hci_stack->hci_transport->init){ 2416 hci_stack->hci_transport->init(hci_stack->config); 2417 } 2418 2419 // open transport 2420 err = hci_stack->hci_transport->open(); 2421 if (err){ 2422 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2423 if (hci_stack->control && hci_stack->control->off){ 2424 (*hci_stack->control->off)(); 2425 } 2426 hci_emit_hci_open_failed(); 2427 return err; 2428 } 2429 return 0; 2430 } 2431 2432 static void hci_power_control_off(void){ 2433 2434 log_info("hci_power_control_off"); 2435 2436 // close low-level device 2437 hci_stack->hci_transport->close(); 2438 2439 log_info("hci_power_control_off - hci_transport closed"); 2440 2441 // power off 2442 if (hci_stack->control && hci_stack->control->off){ 2443 (*hci_stack->control->off)(); 2444 } 2445 2446 log_info("hci_power_control_off - control closed"); 2447 2448 hci_stack->state = HCI_STATE_OFF; 2449 } 2450 2451 static void hci_power_control_sleep(void){ 2452 2453 log_info("hci_power_control_sleep"); 2454 2455 #if 0 2456 // don't close serial port during sleep 2457 2458 // close low-level device 2459 hci_stack->hci_transport->close(hci_stack->config); 2460 #endif 2461 2462 // sleep mode 2463 if (hci_stack->control && hci_stack->control->sleep){ 2464 (*hci_stack->control->sleep)(); 2465 } 2466 2467 hci_stack->state = HCI_STATE_SLEEPING; 2468 } 2469 2470 static int hci_power_control_wake(void){ 2471 2472 log_info("hci_power_control_wake"); 2473 2474 // wake on 2475 if (hci_stack->control && hci_stack->control->wake){ 2476 (*hci_stack->control->wake)(); 2477 } 2478 2479 #if 0 2480 // open low-level device 2481 int err = hci_stack->hci_transport->open(hci_stack->config); 2482 if (err){ 2483 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2484 if (hci_stack->control && hci_stack->control->off){ 2485 (*hci_stack->control->off)(); 2486 } 2487 hci_emit_hci_open_failed(); 2488 return err; 2489 } 2490 #endif 2491 2492 return 0; 2493 } 2494 2495 static void hci_power_transition_to_initializing(void){ 2496 // set up state machine 2497 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2498 hci_stack->hci_packet_buffer_reserved = 0; 2499 hci_stack->state = HCI_STATE_INITIALIZING; 2500 hci_stack->substate = HCI_INIT_SEND_RESET; 2501 } 2502 2503 int hci_power_control(HCI_POWER_MODE power_mode){ 2504 2505 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2506 2507 int err = 0; 2508 switch (hci_stack->state){ 2509 2510 case HCI_STATE_OFF: 2511 switch (power_mode){ 2512 case HCI_POWER_ON: 2513 err = hci_power_control_on(); 2514 if (err) { 2515 log_error("hci_power_control_on() error %d", err); 2516 return err; 2517 } 2518 hci_power_transition_to_initializing(); 2519 break; 2520 case HCI_POWER_OFF: 2521 // do nothing 2522 break; 2523 case HCI_POWER_SLEEP: 2524 // do nothing (with SLEEP == OFF) 2525 break; 2526 } 2527 break; 2528 2529 case HCI_STATE_INITIALIZING: 2530 switch (power_mode){ 2531 case HCI_POWER_ON: 2532 // do nothing 2533 break; 2534 case HCI_POWER_OFF: 2535 // no connections yet, just turn it off 2536 hci_power_control_off(); 2537 break; 2538 case HCI_POWER_SLEEP: 2539 // no connections yet, just turn it off 2540 hci_power_control_sleep(); 2541 break; 2542 } 2543 break; 2544 2545 case HCI_STATE_WORKING: 2546 switch (power_mode){ 2547 case HCI_POWER_ON: 2548 // do nothing 2549 break; 2550 case HCI_POWER_OFF: 2551 // see hci_run 2552 hci_stack->state = HCI_STATE_HALTING; 2553 break; 2554 case HCI_POWER_SLEEP: 2555 // see hci_run 2556 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2557 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2558 break; 2559 } 2560 break; 2561 2562 case HCI_STATE_HALTING: 2563 switch (power_mode){ 2564 case HCI_POWER_ON: 2565 hci_power_transition_to_initializing(); 2566 break; 2567 case HCI_POWER_OFF: 2568 // do nothing 2569 break; 2570 case HCI_POWER_SLEEP: 2571 // see hci_run 2572 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2573 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2574 break; 2575 } 2576 break; 2577 2578 case HCI_STATE_FALLING_ASLEEP: 2579 switch (power_mode){ 2580 case HCI_POWER_ON: 2581 2582 #ifdef HAVE_PLATFORM_IPHONE_OS 2583 // nothing to do, if H4 supports power management 2584 if (btstack_control_iphone_power_management_enabled()){ 2585 hci_stack->state = HCI_STATE_INITIALIZING; 2586 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2587 break; 2588 } 2589 #endif 2590 hci_power_transition_to_initializing(); 2591 break; 2592 case HCI_POWER_OFF: 2593 // see hci_run 2594 hci_stack->state = HCI_STATE_HALTING; 2595 break; 2596 case HCI_POWER_SLEEP: 2597 // do nothing 2598 break; 2599 } 2600 break; 2601 2602 case HCI_STATE_SLEEPING: 2603 switch (power_mode){ 2604 case HCI_POWER_ON: 2605 2606 #ifdef HAVE_PLATFORM_IPHONE_OS 2607 // nothing to do, if H4 supports power management 2608 if (btstack_control_iphone_power_management_enabled()){ 2609 hci_stack->state = HCI_STATE_INITIALIZING; 2610 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2611 hci_update_scan_enable(); 2612 break; 2613 } 2614 #endif 2615 err = hci_power_control_wake(); 2616 if (err) return err; 2617 hci_power_transition_to_initializing(); 2618 break; 2619 case HCI_POWER_OFF: 2620 hci_stack->state = HCI_STATE_HALTING; 2621 break; 2622 case HCI_POWER_SLEEP: 2623 // do nothing 2624 break; 2625 } 2626 break; 2627 } 2628 2629 // create internal event 2630 hci_emit_state(); 2631 2632 // trigger next/first action 2633 hci_run(); 2634 2635 return 0; 2636 } 2637 2638 2639 #ifdef ENABLE_CLASSIC 2640 2641 static void hci_update_scan_enable(void){ 2642 // 2 = page scan, 1 = inq scan 2643 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2644 hci_run(); 2645 } 2646 2647 void gap_discoverable_control(uint8_t enable){ 2648 if (enable) enable = 1; // normalize argument 2649 2650 if (hci_stack->discoverable == enable){ 2651 hci_emit_discoverable_enabled(hci_stack->discoverable); 2652 return; 2653 } 2654 2655 hci_stack->discoverable = enable; 2656 hci_update_scan_enable(); 2657 } 2658 2659 void gap_connectable_control(uint8_t enable){ 2660 if (enable) enable = 1; // normalize argument 2661 2662 // don't emit event 2663 if (hci_stack->connectable == enable) return; 2664 2665 hci_stack->connectable = enable; 2666 hci_update_scan_enable(); 2667 } 2668 #endif 2669 2670 void gap_local_bd_addr(bd_addr_t address_buffer){ 2671 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2672 } 2673 2674 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2675 static void hci_host_num_completed_packets(void){ 2676 2677 // create packet manually as arrays are not supported and num_commands should not get reduced 2678 hci_reserve_packet_buffer(); 2679 uint8_t * packet = hci_get_outgoing_packet_buffer(); 2680 2681 uint16_t size = 0; 2682 uint16_t num_handles = 0; 2683 packet[size++] = 0x35; 2684 packet[size++] = 0x0c; 2685 size++; // skip param len 2686 size++; // skip num handles 2687 2688 // add { handle, packets } entries 2689 btstack_linked_item_t * it; 2690 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2691 hci_connection_t * connection = (hci_connection_t *) it; 2692 if (connection->num_packets_completed){ 2693 little_endian_store_16(packet, size, connection->con_handle); 2694 size += 2; 2695 little_endian_store_16(packet, size, connection->num_packets_completed); 2696 size += 2; 2697 // 2698 num_handles++; 2699 connection->num_packets_completed = 0; 2700 } 2701 } 2702 2703 packet[2] = size - 3; 2704 packet[3] = num_handles; 2705 2706 hci_stack->host_completed_packets = 0; 2707 2708 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 2709 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 2710 2711 // release packet buffer for synchronous transport implementations 2712 if (hci_transport_synchronous()){ 2713 hci_stack->hci_packet_buffer_reserved = 0; 2714 } 2715 } 2716 #endif 2717 2718 static void hci_run(void){ 2719 2720 // log_info("hci_run: entered"); 2721 btstack_linked_item_t * it; 2722 2723 // send continuation fragments first, as they block the prepared packet buffer 2724 if (hci_stack->acl_fragmentation_total_size > 0) { 2725 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2726 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2727 if (connection) { 2728 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2729 hci_send_acl_packet_fragments(connection); 2730 return; 2731 } 2732 } else { 2733 // connection gone -> discard further fragments 2734 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2735 hci_stack->acl_fragmentation_total_size = 0; 2736 hci_stack->acl_fragmentation_pos = 0; 2737 } 2738 } 2739 2740 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2741 // send host num completed packets next as they don't require num_cmd_packets > 0 2742 if (!hci_can_send_comand_packet_transport()) return; 2743 if (hci_stack->host_completed_packets){ 2744 hci_host_num_completed_packets(); 2745 return; 2746 } 2747 #endif 2748 2749 if (!hci_can_send_command_packet_now()) return; 2750 2751 // global/non-connection oriented commands 2752 2753 #ifdef ENABLE_CLASSIC 2754 // decline incoming connections 2755 if (hci_stack->decline_reason){ 2756 uint8_t reason = hci_stack->decline_reason; 2757 hci_stack->decline_reason = 0; 2758 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2759 return; 2760 } 2761 2762 // send scan enable 2763 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2764 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2765 hci_stack->new_scan_enable_value = 0xff; 2766 return; 2767 } 2768 #endif 2769 2770 #ifdef ENABLE_BLE 2771 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 2772 if ((hci_stack->state == HCI_STATE_WORKING) 2773 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 2774 2775 #ifdef ENABLE_LE_CENTRAL 2776 // handle le scan 2777 switch(hci_stack->le_scanning_state){ 2778 case LE_START_SCAN: 2779 hci_stack->le_scanning_state = LE_SCANNING; 2780 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2781 return; 2782 2783 case LE_STOP_SCAN: 2784 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2785 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2786 return; 2787 default: 2788 break; 2789 } 2790 if (hci_stack->le_scan_type != 0xff){ 2791 // defaults: active scanning, accept all advertisement packets 2792 int scan_type = hci_stack->le_scan_type; 2793 hci_stack->le_scan_type = 0xff; 2794 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); 2795 return; 2796 } 2797 #endif 2798 #ifdef ENABLE_LE_PERIPHERAL 2799 // le advertisement control 2800 if (hci_stack->le_advertisements_todo){ 2801 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2802 } 2803 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2804 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2805 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2806 return; 2807 } 2808 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2809 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2810 hci_send_cmd(&hci_le_set_advertising_parameters, 2811 hci_stack->le_advertisements_interval_min, 2812 hci_stack->le_advertisements_interval_max, 2813 hci_stack->le_advertisements_type, 2814 hci_stack->le_own_addr_type, 2815 hci_stack->le_advertisements_direct_address_type, 2816 hci_stack->le_advertisements_direct_address, 2817 hci_stack->le_advertisements_channel_map, 2818 hci_stack->le_advertisements_filter_policy); 2819 return; 2820 } 2821 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2822 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2823 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, hci_stack->le_advertisements_data); 2824 return; 2825 } 2826 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2827 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2828 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2829 hci_stack->le_scan_response_data); 2830 return; 2831 } 2832 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 2833 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2834 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2835 return; 2836 } 2837 #endif 2838 2839 #ifdef ENABLE_LE_CENTRAL 2840 // 2841 // LE Whitelist Management 2842 // 2843 2844 // check if whitelist needs modification 2845 btstack_linked_list_iterator_t lit; 2846 int modification_pending = 0; 2847 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2848 while (btstack_linked_list_iterator_has_next(&lit)){ 2849 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2850 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2851 modification_pending = 1; 2852 break; 2853 } 2854 } 2855 2856 if (modification_pending){ 2857 // stop connnecting if modification pending 2858 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2859 hci_send_cmd(&hci_le_create_connection_cancel); 2860 return; 2861 } 2862 2863 // add/remove entries 2864 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2865 while (btstack_linked_list_iterator_has_next(&lit)){ 2866 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2867 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2868 entry->state = LE_WHITELIST_ON_CONTROLLER; 2869 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2870 return; 2871 2872 } 2873 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2874 bd_addr_t address; 2875 bd_addr_type_t address_type = entry->address_type; 2876 memcpy(address, entry->address, 6); 2877 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2878 btstack_memory_whitelist_entry_free(entry); 2879 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2880 return; 2881 } 2882 } 2883 } 2884 2885 // start connecting 2886 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2887 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2888 bd_addr_t null_addr; 2889 memset(null_addr, 0, 6); 2890 hci_send_cmd(&hci_le_create_connection, 2891 0x0060, // scan interval: 60 ms 2892 0x0030, // scan interval: 30 ms 2893 1, // use whitelist 2894 0, // peer address type 2895 null_addr, // peer bd addr 2896 hci_stack->le_own_addr_type, // our addr type: 2897 0x0008, // conn interval min 2898 0x0018, // conn interval max 2899 0, // conn latency 2900 0x0048, // supervision timeout 2901 0x0001, // min ce length 2902 0x0001 // max ce length 2903 ); 2904 return; 2905 } 2906 #endif 2907 } 2908 #endif 2909 2910 // send pending HCI commands 2911 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2912 hci_connection_t * connection = (hci_connection_t *) it; 2913 2914 switch(connection->state){ 2915 case SEND_CREATE_CONNECTION: 2916 switch(connection->address_type){ 2917 #ifdef ENABLE_CLASSIC 2918 case BD_ADDR_TYPE_CLASSIC: 2919 log_info("sending hci_create_connection"); 2920 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2921 break; 2922 #endif 2923 default: 2924 #ifdef ENABLE_BLE 2925 #ifdef ENABLE_LE_CENTRAL 2926 log_info("sending hci_le_create_connection"); 2927 hci_send_cmd(&hci_le_create_connection, 2928 0x0060, // scan interval: 60 ms 2929 0x0030, // scan interval: 30 ms 2930 0, // don't use whitelist 2931 connection->address_type, // peer address type 2932 connection->address, // peer bd addr 2933 hci_stack->le_own_addr_type, // our addr type: 2934 0x0008, // conn interval min 2935 0x0018, // conn interval max 2936 0, // conn latency 2937 0x0048, // supervision timeout 2938 0x0001, // min ce length 2939 0x0001 // max ce length 2940 ); 2941 2942 connection->state = SENT_CREATE_CONNECTION; 2943 #endif 2944 #endif 2945 break; 2946 } 2947 return; 2948 2949 #ifdef ENABLE_CLASSIC 2950 case RECEIVED_CONNECTION_REQUEST: 2951 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2952 connection->state = ACCEPTED_CONNECTION_REQUEST; 2953 connection->role = HCI_ROLE_SLAVE; 2954 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2955 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2956 } 2957 return; 2958 #endif 2959 2960 #ifdef ENABLE_BLE 2961 #ifdef ENABLE_LE_CENTRAL 2962 case SEND_CANCEL_CONNECTION: 2963 connection->state = SENT_CANCEL_CONNECTION; 2964 hci_send_cmd(&hci_le_create_connection_cancel); 2965 return; 2966 #endif 2967 #endif 2968 case SEND_DISCONNECT: 2969 connection->state = SENT_DISCONNECT; 2970 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2971 return; 2972 2973 default: 2974 break; 2975 } 2976 2977 #ifdef ENABLE_CLASSIC 2978 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2979 log_info("responding to link key request"); 2980 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2981 link_key_t link_key; 2982 link_key_type_t link_key_type; 2983 if ( hci_stack->link_key_db 2984 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 2985 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2986 connection->link_key_type = link_key_type; 2987 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2988 } else { 2989 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2990 } 2991 return; 2992 } 2993 2994 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2995 log_info("denying to pin request"); 2996 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2997 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2998 return; 2999 } 3000 3001 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3002 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3003 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3004 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3005 // tweak authentication requirements 3006 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3007 if (connection->bonding_flags & BONDING_DEDICATED){ 3008 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3009 } 3010 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3011 authreq |= 1; 3012 } 3013 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3014 } else { 3015 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3016 } 3017 return; 3018 } 3019 3020 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3021 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3022 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3023 return; 3024 } 3025 3026 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3027 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3028 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3029 return; 3030 } 3031 3032 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3033 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3034 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3035 return; 3036 } 3037 3038 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3039 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3040 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3041 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3042 return; 3043 } 3044 3045 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3046 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3047 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3048 return; 3049 } 3050 3051 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3052 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3053 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3054 return; 3055 } 3056 #endif 3057 3058 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3059 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3060 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3061 return; 3062 } 3063 3064 #ifdef ENABLE_BLE 3065 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 3066 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3067 3068 uint16_t connection_interval_min = connection->le_conn_interval_min; 3069 connection->le_conn_interval_min = 0; 3070 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 3071 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3072 0x0000, 0xffff); 3073 } 3074 #endif 3075 } 3076 3077 hci_connection_t * connection; 3078 switch (hci_stack->state){ 3079 case HCI_STATE_INITIALIZING: 3080 hci_initializing_run(); 3081 break; 3082 3083 case HCI_STATE_HALTING: 3084 3085 log_info("HCI_STATE_HALTING"); 3086 3087 // free whitelist entries 3088 #ifdef ENABLE_BLE 3089 #ifdef ENABLE_LE_CENTRAL 3090 { 3091 btstack_linked_list_iterator_t lit; 3092 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3093 while (btstack_linked_list_iterator_has_next(&lit)){ 3094 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3095 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3096 btstack_memory_whitelist_entry_free(entry); 3097 } 3098 } 3099 #endif 3100 #endif 3101 // close all open connections 3102 connection = (hci_connection_t *) hci_stack->connections; 3103 if (connection){ 3104 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3105 if (!hci_can_send_command_packet_now()) return; 3106 3107 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3108 3109 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3110 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3111 3112 // ... which would be ignored anyway as we shutdown (free) the connection now 3113 hci_shutdown_connection(connection); 3114 3115 // finally, send the disconnect command 3116 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3117 return; 3118 } 3119 log_info("HCI_STATE_HALTING, calling off"); 3120 3121 // switch mode 3122 hci_power_control_off(); 3123 3124 log_info("HCI_STATE_HALTING, emitting state"); 3125 hci_emit_state(); 3126 log_info("HCI_STATE_HALTING, done"); 3127 break; 3128 3129 case HCI_STATE_FALLING_ASLEEP: 3130 switch(hci_stack->substate) { 3131 case HCI_FALLING_ASLEEP_DISCONNECT: 3132 log_info("HCI_STATE_FALLING_ASLEEP"); 3133 // close all open connections 3134 connection = (hci_connection_t *) hci_stack->connections; 3135 3136 #ifdef HAVE_PLATFORM_IPHONE_OS 3137 // don't close connections, if H4 supports power management 3138 if (btstack_control_iphone_power_management_enabled()){ 3139 connection = NULL; 3140 } 3141 #endif 3142 if (connection){ 3143 3144 // send disconnect 3145 if (!hci_can_send_command_packet_now()) return; 3146 3147 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3148 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3149 3150 // send disconnected event right away - causes higher layer connections to get closed, too. 3151 hci_shutdown_connection(connection); 3152 return; 3153 } 3154 3155 if (hci_classic_supported()){ 3156 // disable page and inquiry scan 3157 if (!hci_can_send_command_packet_now()) return; 3158 3159 log_info("HCI_STATE_HALTING, disabling inq scans"); 3160 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3161 3162 // continue in next sub state 3163 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3164 break; 3165 } 3166 // no break - fall through for ble-only chips 3167 3168 case HCI_FALLING_ASLEEP_COMPLETE: 3169 log_info("HCI_STATE_HALTING, calling sleep"); 3170 #ifdef HAVE_PLATFORM_IPHONE_OS 3171 // don't actually go to sleep, if H4 supports power management 3172 if (btstack_control_iphone_power_management_enabled()){ 3173 // SLEEP MODE reached 3174 hci_stack->state = HCI_STATE_SLEEPING; 3175 hci_emit_state(); 3176 break; 3177 } 3178 #endif 3179 // switch mode 3180 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3181 hci_emit_state(); 3182 break; 3183 3184 default: 3185 break; 3186 } 3187 break; 3188 3189 default: 3190 break; 3191 } 3192 } 3193 3194 int hci_send_cmd_packet(uint8_t *packet, int size){ 3195 // house-keeping 3196 3197 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3198 hci_stack->loopback_mode = packet[3]; 3199 } 3200 3201 #ifdef ENABLE_CLASSIC 3202 bd_addr_t addr; 3203 hci_connection_t * conn; 3204 3205 // create_connection? 3206 if (IS_COMMAND(packet, hci_create_connection)){ 3207 reverse_bd_addr(&packet[3], addr); 3208 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3209 3210 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3211 if (!conn){ 3212 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3213 if (!conn){ 3214 // notify client that alloc failed 3215 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3216 return 0; // don't sent packet to controller 3217 } 3218 conn->state = SEND_CREATE_CONNECTION; 3219 } 3220 log_info("conn state %u", conn->state); 3221 switch (conn->state){ 3222 // if connection active exists 3223 case OPEN: 3224 // and OPEN, emit connection complete command, don't send to controller 3225 hci_emit_connection_complete(addr, conn->con_handle, 0); 3226 return 0; 3227 case SEND_CREATE_CONNECTION: 3228 // connection created by hci, e.g. dedicated bonding 3229 break; 3230 default: 3231 // otherwise, just ignore as it is already in the open process 3232 return 0; 3233 } 3234 conn->state = SENT_CREATE_CONNECTION; 3235 } 3236 3237 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3238 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3239 } 3240 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3241 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3242 } 3243 3244 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3245 if (hci_stack->link_key_db){ 3246 reverse_bd_addr(&packet[3], addr); 3247 hci_stack->link_key_db->delete_link_key(addr); 3248 } 3249 } 3250 3251 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3252 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3253 reverse_bd_addr(&packet[3], addr); 3254 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3255 if (conn){ 3256 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3257 } 3258 } 3259 3260 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3261 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3262 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3263 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3264 reverse_bd_addr(&packet[3], addr); 3265 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3266 if (conn){ 3267 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3268 } 3269 } 3270 3271 #ifdef ENABLE_SCO_OVER_HCI 3272 // setup_synchronous_connection? Voice setting at offset 22 3273 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3274 // TODO: compare to current setting if sco connection already active 3275 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3276 } 3277 // accept_synchronus_connection? Voice setting at offset 18 3278 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3279 // TODO: compare to current setting if sco connection already active 3280 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3281 } 3282 #endif 3283 #endif 3284 3285 #ifdef ENABLE_BLE 3286 #ifdef ENABLE_LE_PERIPHERAL 3287 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3288 hci_stack->le_random_address_set = 1; 3289 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3290 } 3291 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3292 hci_stack->le_advertisements_active = packet[3]; 3293 } 3294 #endif 3295 #ifdef ENABLE_LE_CENTRAL 3296 if (IS_COMMAND(packet, hci_le_create_connection)){ 3297 // white list used? 3298 uint8_t initiator_filter_policy = packet[7]; 3299 switch (initiator_filter_policy){ 3300 case 0: 3301 // whitelist not used 3302 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3303 break; 3304 case 1: 3305 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3306 break; 3307 default: 3308 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3309 break; 3310 } 3311 } 3312 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3313 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3314 } 3315 #endif 3316 #endif 3317 3318 hci_stack->num_cmd_packets--; 3319 3320 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3321 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3322 3323 // release packet buffer for synchronous transport implementations 3324 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3325 hci_stack->hci_packet_buffer_reserved = 0; 3326 } 3327 3328 return err; 3329 } 3330 3331 // disconnect because of security block 3332 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3333 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3334 if (!connection) return; 3335 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3336 } 3337 3338 3339 // Configure Secure Simple Pairing 3340 3341 #ifdef ENABLE_CLASSIC 3342 3343 // enable will enable SSP during init 3344 void gap_ssp_set_enable(int enable){ 3345 hci_stack->ssp_enable = enable; 3346 } 3347 3348 static int hci_local_ssp_activated(void){ 3349 return gap_ssp_supported() && hci_stack->ssp_enable; 3350 } 3351 3352 // if set, BTstack will respond to io capability request using authentication requirement 3353 void gap_ssp_set_io_capability(int io_capability){ 3354 hci_stack->ssp_io_capability = io_capability; 3355 } 3356 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3357 hci_stack->ssp_authentication_requirement = authentication_requirement; 3358 } 3359 3360 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3361 void gap_ssp_set_auto_accept(int auto_accept){ 3362 hci_stack->ssp_auto_accept = auto_accept; 3363 } 3364 #endif 3365 3366 // va_list part of hci_send_cmd 3367 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3368 if (!hci_can_send_command_packet_now()){ 3369 log_error("hci_send_cmd called but cannot send packet now"); 3370 return 0; 3371 } 3372 3373 // for HCI INITIALIZATION 3374 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3375 hci_stack->last_cmd_opcode = cmd->opcode; 3376 3377 hci_reserve_packet_buffer(); 3378 uint8_t * packet = hci_stack->hci_packet_buffer; 3379 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3380 return hci_send_cmd_packet(packet, size); 3381 } 3382 3383 /** 3384 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3385 */ 3386 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3387 va_list argptr; 3388 va_start(argptr, cmd); 3389 int res = hci_send_cmd_va_arg(cmd, argptr); 3390 va_end(argptr); 3391 return res; 3392 } 3393 3394 // Create various non-HCI events. 3395 // TODO: generalize, use table similar to hci_create_command 3396 3397 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3398 // dump packet 3399 if (dump) { 3400 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3401 } 3402 3403 // dispatch to all event handlers 3404 btstack_linked_list_iterator_t it; 3405 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3406 while (btstack_linked_list_iterator_has_next(&it)){ 3407 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3408 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3409 } 3410 } 3411 3412 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3413 if (!hci_stack->acl_packet_handler) return; 3414 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3415 } 3416 3417 #ifdef ENABLE_CLASSIC 3418 static void hci_notify_if_sco_can_send_now(void){ 3419 // notify SCO sender if waiting 3420 if (!hci_stack->sco_waiting_for_can_send_now) return; 3421 if (hci_can_send_sco_packet_now()){ 3422 hci_stack->sco_waiting_for_can_send_now = 0; 3423 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3424 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3425 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3426 } 3427 } 3428 3429 // parsing end emitting has been merged to reduce code size 3430 static void gap_inquiry_explode(uint8_t * packet){ 3431 uint8_t event[15+GAP_INQUIRY_MAX_NAME_LEN]; 3432 3433 uint8_t * eir_data; 3434 ad_context_t context; 3435 const uint8_t * name; 3436 uint8_t name_len; 3437 3438 int event_type = hci_event_packet_get_type(packet); 3439 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 3440 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 3441 3442 // event[1] is set at the end 3443 int i; 3444 for (i=0; i<num_responses;i++){ 3445 memset(event, 0, sizeof(event)); 3446 event[0] = GAP_EVENT_INQUIRY_RESULT; 3447 uint8_t event_size = 18; // if name is not set by EIR 3448 3449 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 3450 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 3451 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 3452 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 3453 3454 switch (event_type){ 3455 case HCI_EVENT_INQUIRY_RESULT: 3456 // 14,15,16,17 = 0, size 18 3457 break; 3458 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3459 event[14] = 1; 3460 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3461 // 16,17 = 0, size 18 3462 break; 3463 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3464 event[14] = 1; 3465 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3466 // for EIR packets, there is only one reponse in it 3467 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 3468 name = NULL; 3469 // EIR data is 240 bytes in EIR event 3470 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 3471 uint8_t data_type = ad_iterator_get_data_type(&context); 3472 uint8_t data_size = ad_iterator_get_data_len(&context); 3473 const uint8_t * data = ad_iterator_get_data(&context); 3474 // Prefer Complete Local Name over Shortend Local Name 3475 switch (data_type){ 3476 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 3477 if (name) continue; 3478 /* explicit fall-through */ 3479 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 3480 name = data; 3481 name_len = data_size; 3482 break; 3483 default: 3484 break; 3485 } 3486 } 3487 if (name){ 3488 event[16] = 1; 3489 // truncate name if needed 3490 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 3491 event[17] = len; 3492 memcpy(&event[18], name, len); 3493 event_size += len; 3494 } 3495 break; 3496 } 3497 event[1] = event_size - 2; 3498 hci_emit_event(event, event_size, 1); 3499 } 3500 } 3501 #endif 3502 3503 void hci_emit_state(void){ 3504 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3505 uint8_t event[3]; 3506 event[0] = BTSTACK_EVENT_STATE; 3507 event[1] = sizeof(event) - 2; 3508 event[2] = hci_stack->state; 3509 hci_emit_event(event, sizeof(event), 1); 3510 } 3511 3512 #ifdef ENABLE_CLASSIC 3513 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3514 uint8_t event[13]; 3515 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3516 event[1] = sizeof(event) - 2; 3517 event[2] = status; 3518 little_endian_store_16(event, 3, con_handle); 3519 reverse_bd_addr(address, &event[5]); 3520 event[11] = 1; // ACL connection 3521 event[12] = 0; // encryption disabled 3522 hci_emit_event(event, sizeof(event), 1); 3523 } 3524 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3525 if (disable_l2cap_timeouts) return; 3526 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3527 uint8_t event[4]; 3528 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3529 event[1] = sizeof(event) - 2; 3530 little_endian_store_16(event, 2, conn->con_handle); 3531 hci_emit_event(event, sizeof(event), 1); 3532 } 3533 #endif 3534 3535 #ifdef ENABLE_BLE 3536 #ifdef ENABLE_LE_CENTRAL 3537 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3538 uint8_t event[21]; 3539 event[0] = HCI_EVENT_LE_META; 3540 event[1] = sizeof(event) - 2; 3541 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3542 event[3] = status; 3543 little_endian_store_16(event, 4, con_handle); 3544 event[6] = 0; // TODO: role 3545 event[7] = address_type; 3546 reverse_bd_addr(address, &event[8]); 3547 little_endian_store_16(event, 14, 0); // interval 3548 little_endian_store_16(event, 16, 0); // latency 3549 little_endian_store_16(event, 18, 0); // supervision timeout 3550 event[20] = 0; // master clock accuracy 3551 hci_emit_event(event, sizeof(event), 1); 3552 } 3553 #endif 3554 #endif 3555 3556 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3557 uint8_t event[6]; 3558 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3559 event[1] = sizeof(event) - 2; 3560 event[2] = 0; // status = OK 3561 little_endian_store_16(event, 3, con_handle); 3562 event[5] = reason; 3563 hci_emit_event(event, sizeof(event), 1); 3564 } 3565 3566 static void hci_emit_nr_connections_changed(void){ 3567 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3568 uint8_t event[3]; 3569 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3570 event[1] = sizeof(event) - 2; 3571 event[2] = nr_hci_connections(); 3572 hci_emit_event(event, sizeof(event), 1); 3573 } 3574 3575 static void hci_emit_hci_open_failed(void){ 3576 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3577 uint8_t event[2]; 3578 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3579 event[1] = sizeof(event) - 2; 3580 hci_emit_event(event, sizeof(event), 1); 3581 } 3582 3583 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3584 log_info("hci_emit_dedicated_bonding_result %u ", status); 3585 uint8_t event[9]; 3586 int pos = 0; 3587 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3588 event[pos++] = sizeof(event) - 2; 3589 event[pos++] = status; 3590 reverse_bd_addr(address, &event[pos]); 3591 hci_emit_event(event, sizeof(event), 1); 3592 } 3593 3594 3595 #ifdef ENABLE_CLASSIC 3596 3597 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3598 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3599 uint8_t event[5]; 3600 int pos = 0; 3601 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3602 event[pos++] = sizeof(event) - 2; 3603 little_endian_store_16(event, 2, con_handle); 3604 pos += 2; 3605 event[pos++] = level; 3606 hci_emit_event(event, sizeof(event), 1); 3607 } 3608 3609 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3610 if (!connection) return LEVEL_0; 3611 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3612 return gap_security_level_for_link_key_type(connection->link_key_type); 3613 } 3614 3615 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3616 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3617 uint8_t event[3]; 3618 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3619 event[1] = sizeof(event) - 2; 3620 event[2] = enabled; 3621 hci_emit_event(event, sizeof(event), 1); 3622 } 3623 3624 #ifdef ENABLE_CLASSIC 3625 // query if remote side supports eSCO 3626 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3627 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3628 if (!connection) return 0; 3629 return connection->remote_supported_feature_eSCO; 3630 } 3631 3632 // query if remote side supports SSP 3633 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3634 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3635 if (!connection) return 0; 3636 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3637 } 3638 3639 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3640 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3641 } 3642 #endif 3643 3644 // GAP API 3645 /** 3646 * @bbrief enable/disable bonding. default is enabled 3647 * @praram enabled 3648 */ 3649 void gap_set_bondable_mode(int enable){ 3650 hci_stack->bondable = enable ? 1 : 0; 3651 } 3652 /** 3653 * @brief Get bondable mode. 3654 * @return 1 if bondable 3655 */ 3656 int gap_get_bondable_mode(void){ 3657 return hci_stack->bondable; 3658 } 3659 3660 /** 3661 * @brief map link keys to security levels 3662 */ 3663 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3664 switch (link_key_type){ 3665 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3666 return LEVEL_4; 3667 case COMBINATION_KEY: 3668 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3669 return LEVEL_3; 3670 default: 3671 return LEVEL_2; 3672 } 3673 } 3674 3675 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3676 log_info("gap_mitm_protection_required_for_security_level %u", level); 3677 return level > LEVEL_2; 3678 } 3679 3680 /** 3681 * @brief get current security level 3682 */ 3683 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3684 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3685 if (!connection) return LEVEL_0; 3686 return gap_security_level_for_connection(connection); 3687 } 3688 3689 /** 3690 * @brief request connection to device to 3691 * @result GAP_AUTHENTICATION_RESULT 3692 */ 3693 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3694 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3695 if (!connection){ 3696 hci_emit_security_level(con_handle, LEVEL_0); 3697 return; 3698 } 3699 gap_security_level_t current_level = gap_security_level(con_handle); 3700 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3701 if (current_level >= requested_level){ 3702 hci_emit_security_level(con_handle, current_level); 3703 return; 3704 } 3705 3706 connection->requested_security_level = requested_level; 3707 3708 #if 0 3709 // sending encryption request without a link key results in an error. 3710 // TODO: figure out how to use it properly 3711 3712 // would enabling ecnryption suffice (>= LEVEL_2)? 3713 if (hci_stack->link_key_db){ 3714 link_key_type_t link_key_type; 3715 link_key_t link_key; 3716 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3717 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3718 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3719 return; 3720 } 3721 } 3722 } 3723 #endif 3724 3725 // try to authenticate connection 3726 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3727 hci_run(); 3728 } 3729 3730 /** 3731 * @brief start dedicated bonding with device. disconnect after bonding 3732 * @param device 3733 * @param request MITM protection 3734 * @result GAP_DEDICATED_BONDING_COMPLETE 3735 */ 3736 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3737 3738 // create connection state machine 3739 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3740 3741 if (!connection){ 3742 return BTSTACK_MEMORY_ALLOC_FAILED; 3743 } 3744 3745 // delete linkn key 3746 gap_drop_link_key_for_bd_addr(device); 3747 3748 // configure LEVEL_2/3, dedicated bonding 3749 connection->state = SEND_CREATE_CONNECTION; 3750 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3751 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3752 connection->bonding_flags = BONDING_DEDICATED; 3753 3754 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3755 3756 // handle: connnection failure (connection complete != ok) 3757 // handle: authentication failure 3758 // handle: disconnect on done 3759 3760 hci_run(); 3761 3762 return 0; 3763 } 3764 #endif 3765 3766 void gap_set_local_name(const char * local_name){ 3767 hci_stack->local_name = local_name; 3768 } 3769 3770 3771 #ifdef ENABLE_BLE 3772 3773 #ifdef ENABLE_LE_CENTRAL 3774 void gap_start_scan(void){ 3775 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3776 hci_stack->le_scanning_state = LE_START_SCAN; 3777 hci_run(); 3778 } 3779 3780 void gap_stop_scan(void){ 3781 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3782 hci_stack->le_scanning_state = LE_STOP_SCAN; 3783 hci_run(); 3784 } 3785 3786 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3787 hci_stack->le_scan_type = scan_type; 3788 hci_stack->le_scan_interval = scan_interval; 3789 hci_stack->le_scan_window = scan_window; 3790 hci_run(); 3791 } 3792 3793 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3794 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3795 if (!conn){ 3796 log_info("gap_connect: no connection exists yet, creating context"); 3797 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3798 if (!conn){ 3799 // notify client that alloc failed 3800 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3801 log_info("gap_connect: failed to alloc hci_connection_t"); 3802 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3803 } 3804 conn->state = SEND_CREATE_CONNECTION; 3805 log_info("gap_connect: send create connection next"); 3806 hci_run(); 3807 return 0; 3808 } 3809 3810 if (!hci_is_le_connection(conn) || 3811 conn->state == SEND_CREATE_CONNECTION || 3812 conn->state == SENT_CREATE_CONNECTION) { 3813 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3814 log_error("gap_connect: classic connection or connect is already being created"); 3815 return GATT_CLIENT_IN_WRONG_STATE; 3816 } 3817 3818 log_info("gap_connect: context exists with state %u", conn->state); 3819 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3820 hci_run(); 3821 return 0; 3822 } 3823 3824 // @assumption: only a single outgoing LE Connection exists 3825 static hci_connection_t * gap_get_outgoing_connection(void){ 3826 btstack_linked_item_t *it; 3827 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3828 hci_connection_t * conn = (hci_connection_t *) it; 3829 if (!hci_is_le_connection(conn)) continue; 3830 switch (conn->state){ 3831 case SEND_CREATE_CONNECTION: 3832 case SENT_CREATE_CONNECTION: 3833 return conn; 3834 default: 3835 break; 3836 }; 3837 } 3838 return NULL; 3839 } 3840 3841 uint8_t gap_connect_cancel(void){ 3842 hci_connection_t * conn = gap_get_outgoing_connection(); 3843 if (!conn) return 0; 3844 switch (conn->state){ 3845 case SEND_CREATE_CONNECTION: 3846 // skip sending create connection and emit event instead 3847 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3848 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3849 btstack_memory_hci_connection_free( conn ); 3850 break; 3851 case SENT_CREATE_CONNECTION: 3852 // request to send cancel connection 3853 conn->state = SEND_CANCEL_CONNECTION; 3854 hci_run(); 3855 break; 3856 default: 3857 break; 3858 } 3859 return 0; 3860 } 3861 #endif 3862 3863 /** 3864 * @brief Updates the connection parameters for a given LE connection 3865 * @param handle 3866 * @param conn_interval_min (unit: 1.25ms) 3867 * @param conn_interval_max (unit: 1.25ms) 3868 * @param conn_latency 3869 * @param supervision_timeout (unit: 10ms) 3870 * @returns 0 if ok 3871 */ 3872 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3873 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3874 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3875 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3876 connection->le_conn_interval_min = conn_interval_min; 3877 connection->le_conn_interval_max = conn_interval_max; 3878 connection->le_conn_latency = conn_latency; 3879 connection->le_supervision_timeout = supervision_timeout; 3880 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3881 hci_run(); 3882 return 0; 3883 } 3884 3885 /** 3886 * @brief Request an update of the connection parameter for a given LE connection 3887 * @param handle 3888 * @param conn_interval_min (unit: 1.25ms) 3889 * @param conn_interval_max (unit: 1.25ms) 3890 * @param conn_latency 3891 * @param supervision_timeout (unit: 10ms) 3892 * @returns 0 if ok 3893 */ 3894 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3895 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3896 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3897 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3898 connection->le_conn_interval_min = conn_interval_min; 3899 connection->le_conn_interval_max = conn_interval_max; 3900 connection->le_conn_latency = conn_latency; 3901 connection->le_supervision_timeout = supervision_timeout; 3902 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3903 hci_run(); 3904 return 0; 3905 } 3906 3907 #ifdef ENABLE_LE_PERIPHERAL 3908 3909 static void gap_advertisments_changed(void){ 3910 // disable advertisements before updating adv, scan data, or adv params 3911 if (hci_stack->le_advertisements_active){ 3912 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3913 } 3914 hci_run(); 3915 } 3916 3917 /** 3918 * @brief Set Advertisement Data 3919 * @param advertising_data_length 3920 * @param advertising_data (max 31 octets) 3921 * @note data is not copied, pointer has to stay valid 3922 */ 3923 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3924 hci_stack->le_advertisements_data_len = advertising_data_length; 3925 hci_stack->le_advertisements_data = advertising_data; 3926 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3927 gap_advertisments_changed(); 3928 } 3929 3930 /** 3931 * @brief Set Scan Response Data 3932 * @param advertising_data_length 3933 * @param advertising_data (max 31 octets) 3934 * @note data is not copied, pointer has to stay valid 3935 */ 3936 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3937 hci_stack->le_scan_response_data_len = scan_response_data_length; 3938 hci_stack->le_scan_response_data = scan_response_data; 3939 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3940 gap_advertisments_changed(); 3941 } 3942 3943 /** 3944 * @brief Set Advertisement Parameters 3945 * @param adv_int_min 3946 * @param adv_int_max 3947 * @param adv_type 3948 * @param direct_address_type 3949 * @param direct_address 3950 * @param channel_map 3951 * @param filter_policy 3952 * 3953 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3954 */ 3955 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3956 uint8_t direct_address_typ, bd_addr_t direct_address, 3957 uint8_t channel_map, uint8_t filter_policy) { 3958 3959 hci_stack->le_advertisements_interval_min = adv_int_min; 3960 hci_stack->le_advertisements_interval_max = adv_int_max; 3961 hci_stack->le_advertisements_type = adv_type; 3962 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3963 hci_stack->le_advertisements_channel_map = channel_map; 3964 hci_stack->le_advertisements_filter_policy = filter_policy; 3965 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3966 3967 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3968 gap_advertisments_changed(); 3969 } 3970 3971 /** 3972 * @brief Enable/Disable Advertisements 3973 * @param enabled 3974 */ 3975 void gap_advertisements_enable(int enabled){ 3976 hci_stack->le_advertisements_enabled = enabled; 3977 if (enabled && !hci_stack->le_advertisements_active){ 3978 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3979 } 3980 if (!enabled && hci_stack->le_advertisements_active){ 3981 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3982 } 3983 hci_run(); 3984 } 3985 3986 #endif 3987 3988 void hci_le_set_own_address_type(uint8_t own_address_type){ 3989 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 3990 if (own_address_type == hci_stack->le_own_addr_type) return; 3991 hci_stack->le_own_addr_type = own_address_type; 3992 3993 #ifdef ENABLE_LE_PERIPHERAL 3994 // update advertisement parameters, too 3995 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3996 gap_advertisments_changed(); 3997 #endif 3998 #ifdef ENABLE_LE_CENTRAL 3999 // note: we don't update scan parameters or modify ongoing connection attempts 4000 #endif 4001 } 4002 4003 #endif 4004 4005 uint8_t gap_disconnect(hci_con_handle_t handle){ 4006 hci_connection_t * conn = hci_connection_for_handle(handle); 4007 if (!conn){ 4008 hci_emit_disconnection_complete(handle, 0); 4009 return 0; 4010 } 4011 conn->state = SEND_DISCONNECT; 4012 hci_run(); 4013 return 0; 4014 } 4015 4016 /** 4017 * @brief Get connection type 4018 * @param con_handle 4019 * @result connection_type 4020 */ 4021 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4022 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4023 if (!conn) return GAP_CONNECTION_INVALID; 4024 switch (conn->address_type){ 4025 case BD_ADDR_TYPE_LE_PUBLIC: 4026 case BD_ADDR_TYPE_LE_RANDOM: 4027 return GAP_CONNECTION_LE; 4028 case BD_ADDR_TYPE_SCO: 4029 return GAP_CONNECTION_SCO; 4030 case BD_ADDR_TYPE_CLASSIC: 4031 return GAP_CONNECTION_ACL; 4032 default: 4033 return GAP_CONNECTION_INVALID; 4034 } 4035 } 4036 4037 #ifdef ENABLE_BLE 4038 4039 #ifdef ENABLE_LE_CENTRAL 4040 /** 4041 * @brief Auto Connection Establishment - Start Connecting to device 4042 * @param address_typ 4043 * @param address 4044 * @returns 0 if ok 4045 */ 4046 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4047 // check capacity 4048 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4049 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4050 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4051 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4052 entry->address_type = address_type; 4053 memcpy(entry->address, address, 6); 4054 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4055 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4056 hci_run(); 4057 return 0; 4058 } 4059 4060 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4061 btstack_linked_list_iterator_t it; 4062 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4063 while (btstack_linked_list_iterator_has_next(&it)){ 4064 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4065 if (entry->address_type != address_type) continue; 4066 if (memcmp(entry->address, address, 6) != 0) continue; 4067 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4068 // remove from controller if already present 4069 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4070 continue; 4071 } 4072 // direclty remove entry from whitelist 4073 btstack_linked_list_iterator_remove(&it); 4074 btstack_memory_whitelist_entry_free(entry); 4075 } 4076 } 4077 4078 /** 4079 * @brief Auto Connection Establishment - Stop Connecting to device 4080 * @param address_typ 4081 * @param address 4082 * @returns 0 if ok 4083 */ 4084 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4085 hci_remove_from_whitelist(address_type, address); 4086 hci_run(); 4087 return 0; 4088 } 4089 4090 /** 4091 * @brief Auto Connection Establishment - Stop everything 4092 * @note Convenience function to stop all active auto connection attempts 4093 */ 4094 void gap_auto_connection_stop_all(void){ 4095 btstack_linked_list_iterator_t it; 4096 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4097 while (btstack_linked_list_iterator_has_next(&it)){ 4098 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4099 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4100 // remove from controller if already present 4101 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4102 continue; 4103 } 4104 // directly remove entry from whitelist 4105 btstack_linked_list_iterator_remove(&it); 4106 btstack_memory_whitelist_entry_free(entry); 4107 } 4108 hci_run(); 4109 } 4110 #endif 4111 #endif 4112 4113 #ifdef ENABLE_CLASSIC 4114 /** 4115 * @brief Set Extended Inquiry Response data 4116 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4117 * @note has to be done before stack starts up 4118 */ 4119 void gap_set_extended_inquiry_response(const uint8_t * data){ 4120 hci_stack->eir_data = data; 4121 } 4122 4123 /** 4124 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4125 * @param inquriy_mode see bluetooth_defines.h 4126 */ 4127 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4128 hci_stack->inquiry_mode = mode; 4129 } 4130 4131 /** 4132 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4133 */ 4134 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4135 hci_stack->sco_voice_setting = voice_setting; 4136 } 4137 4138 /** 4139 * @brief Get SCO Voice Setting 4140 * @return current voice setting 4141 */ 4142 uint16_t hci_get_sco_voice_setting(void){ 4143 return hci_stack->sco_voice_setting; 4144 } 4145 4146 /** @brief Get SCO packet length for current SCO Voice setting 4147 * @note Using SCO packets of the exact length is required for USB transfer 4148 * @return Length of SCO packets in bytes (not audio frames) 4149 */ 4150 int hci_get_sco_packet_length(void){ 4151 // see Core Spec for H2 USB Transfer. 4152 if (hci_stack->sco_voice_setting & 0x0020) return 51; 4153 return 27; 4154 } 4155 #endif 4156 4157 /** 4158 * @brief Set callback for Bluetooth Hardware Error 4159 */ 4160 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 4161 hci_stack->hardware_error_callback = fn; 4162 } 4163 4164 void hci_disconnect_all(void){ 4165 btstack_linked_list_iterator_t it; 4166 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4167 while (btstack_linked_list_iterator_has_next(&it)){ 4168 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4169 if (con->state == SENT_DISCONNECT) continue; 4170 con->state = SEND_DISCONNECT; 4171 } 4172 hci_run(); 4173 } 4174 4175 uint16_t hci_get_manufacturer(void){ 4176 return hci_stack->manufacturer; 4177 } 4178