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https://mbed.org/forum/ja/topic/4890/
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BTstack
by 
Norimasa Okamoto
Diff: BTstack/hci.c
- Revision:
- 0:1ed23ab1345f
- Child:
- 2:871b41f4789e
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/BTstack/hci.c Tue Jun 26 14:27:45 2012 +0000
@@ -0,0 +1,1409 @@
+/*
+ * Copyright (C) 2009-2012 by Matthias Ringwald
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * 4. Any redistribution, use, or modification is done solely for
+ * personal benefit and not for any commercial purpose or for
+ * monetary gain.
+ *
+ * THIS SOFTWARE IS PROVIDED BY MATTHIAS RINGWALD AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
+ * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+ * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * Please inquire about commercial licensing options at btstack@ringwald.ch
+ *
+ */
+
+/*
+ * hci.c
+ *
+ * Created by Matthias Ringwald on 4/29/09.
+ *
+ */
+
+#include "config.h"
+
+#include "hci.h"
+
+#include <stdarg.h>
+#include <string.h>
+#include <stdio.h>
+
+#ifndef EMBEDDED
+#include <unistd.h> // gethostbyname
+#include <btstack/version.h>
+#endif
+
+#include "btstack_memory.h"
+#include "debug.h"
+#include "hci_dump.h"
+
+#include <btstack/hci_cmds.h>
+
+#define HCI_CONNECTION_TIMEOUT_MS 10000
+
+#ifdef USE_BLUETOOL
+#include "bt_control_iphone.h"
+#endif
+
+static void hci_update_scan_enable(void);
+
+// the STACK is here
+static hci_stack_t hci_stack;
+
+/**
+ * get connection for a given handle
+ *
+ * @return connection OR NULL, if not found
+ */
+hci_connection_t * connection_for_handle(hci_con_handle_t con_handle){
+ linked_item_t *it;
+ for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){
+ if ( ((hci_connection_t *) it)->con_handle == con_handle){
+ return (hci_connection_t *) it;
+ }
+ }
+ return NULL;
+}
+
+static void hci_connection_timeout_handler(timer_source_t *timer){
+ hci_connection_t * connection = (hci_connection_t *) linked_item_get_user(&timer->item);
+#ifdef HAVE_TIME
+ struct timeval tv;
+ gettimeofday(&tv, NULL);
+ if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) {
+ // connections might be timed out
+ hci_emit_l2cap_check_timeout(connection);
+ }
+#endif
+#ifdef HAVE_TICK
+ if (embedded_get_ticks() > connection->timestamp + embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){
+ // connections might be timed out
+ hci_emit_l2cap_check_timeout(connection);
+ }
+#endif
+ run_loop_set_timer(timer, HCI_CONNECTION_TIMEOUT_MS);
+ run_loop_add_timer(timer);
+}
+
+static void hci_connection_timestamp(hci_connection_t *connection){
+#ifdef HAVE_TIME
+ gettimeofday(&connection->timestamp, NULL);
+#endif
+#ifdef HAVE_TICK
+ connection->timestamp = embedded_get_ticks();
+#endif
+}
+
+/**
+ * create connection for given address
+ *
+ * @return connection OR NULL, if no memory left
+ */
+static hci_connection_t * create_connection_for_addr(bd_addr_t addr){
+ hci_connection_t * conn = (hci_connection_t *) btstack_memory_hci_connection_get();
+ if (!conn) return NULL;
+ BD_ADDR_COPY(conn->address, addr);
+ conn->con_handle = 0xffff;
+ conn->authentication_flags = AUTH_FLAGS_NONE;
+ linked_item_set_user(&conn->timeout.item, conn);
+ conn->timeout.process = hci_connection_timeout_handler;
+ hci_connection_timestamp(conn);
+ conn->acl_recombination_length = 0;
+ conn->acl_recombination_pos = 0;
+ conn->num_acl_packets_sent = 0;
+ linked_list_add(&hci_stack.connections, (linked_item_t *) conn);
+ return conn;
+}
+
+/**
+ * get connection for given address
+ *
+ * @return connection OR NULL, if not found
+ */
+static hci_connection_t * connection_for_address(bd_addr_t address){
+ linked_item_t *it;
+ for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){
+ if ( ! BD_ADDR_CMP( ((hci_connection_t *) it)->address, address) ){
+ return (hci_connection_t *) it;
+ }
+ }
+ return NULL;
+}
+
+inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){
+ conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags);
+}
+
+inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){
+ conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags);
+}
+
+
+/**
+ * add authentication flags and reset timer
+ */
+static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){
+ bd_addr_t addr;
+ bt_flip_addr(addr, *(bd_addr_t *) bd_addr);
+ hci_connection_t * conn = connection_for_address(addr);
+ if (conn) {
+ connectionSetAuthenticationFlags(conn, flags);
+ hci_connection_timestamp(conn);
+ }
+}
+
+int hci_authentication_active_for_handle(hci_con_handle_t handle){
+ hci_connection_t * conn = connection_for_handle(handle);
+ if (!conn) return 0;
+ if (!conn->authentication_flags) return 0;
+ if (conn->authentication_flags & SENT_LINK_KEY_REPLY) return 0;
+ if (conn->authentication_flags & RECV_LINK_KEY_NOTIFICATION) return 0;
+ return 1;
+}
+
+void hci_drop_link_key_for_bd_addr(bd_addr_t *addr){
+ if (hci_stack.remote_device_db) {
+ hci_stack.remote_device_db->delete_link_key(addr);
+ }
+}
+
+
+/**
+ * count connections
+ */
+static int nr_hci_connections(void){
+ int count = 0;
+ linked_item_t *it;
+ for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next, count++);
+ return count;
+}
+
+/**
+ * Dummy handler called by HCI
+ */
+static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){
+}
+
+uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){
+ hci_connection_t * connection = connection_for_handle(handle);
+ if (!connection) {
+ log_error("hci_number_outgoing_packets connectino for handle %u does not exist!\n", handle);
+ return 0;
+ }
+ return connection->num_acl_packets_sent;
+}
+
+uint8_t hci_number_free_acl_slots(){
+ uint8_t free_slots = hci_stack.total_num_acl_packets;
+ linked_item_t *it;
+ for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){
+ hci_connection_t * connection = (hci_connection_t *) it;
+ if (free_slots < connection->num_acl_packets_sent) {
+ log_error("hci_number_free_acl_slots: sum of outgoing packets > total acl packets!\n");
+ return 0;
+ }
+ free_slots -= connection->num_acl_packets_sent;
+ }
+ return free_slots;
+}
+
+int hci_can_send_packet_now(uint8_t packet_type){
+
+ // check for async hci transport implementations
+ if (hci_stack.hci_transport->can_send_packet_now){
+ if (!hci_stack.hci_transport->can_send_packet_now(packet_type)){
+ return 0;
+ }
+ }
+
+ // check regular Bluetooth flow control
+ switch (packet_type) {
+ case HCI_ACL_DATA_PACKET:
+ return hci_number_free_acl_slots();
+ case HCI_COMMAND_DATA_PACKET:
+ return hci_stack.num_cmd_packets;
+ default:
+ return 0;
+ }
+}
+
+int hci_send_acl_packet(uint8_t *packet, int size){
+
+ // check for free places on BT module
+ if (!hci_number_free_acl_slots()) return BTSTACK_ACL_BUFFERS_FULL;
+
+ hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet);
+ hci_connection_t *connection = connection_for_handle( con_handle);
+ if (!connection) return 0;
+ hci_connection_timestamp(connection);
+
+ // count packet
+ connection->num_acl_packets_sent++;
+ // log_info("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent);
+
+ // send packet
+ int err = hci_stack.hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size);
+
+ return err;
+}
+
+static void acl_handler(uint8_t *packet, int size){
+
+ // get info
+ hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet);
+ hci_connection_t *conn = connection_for_handle(con_handle);
+ uint8_t acl_flags = READ_ACL_FLAGS(packet);
+ uint16_t acl_length = READ_ACL_LENGTH(packet);
+
+ // ignore non-registered handle
+ if (!conn){
+ log_error( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle);
+ return;
+ }
+
+ // update idle timestamp
+ hci_connection_timestamp(conn);
+
+ // handle different packet types
+ switch (acl_flags & 0x03) {
+
+ case 0x01: // continuation fragment
+
+ // sanity check
+ if (conn->acl_recombination_pos == 0) {
+ log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x\n", con_handle);
+ return;
+ }
+
+ // append fragment payload (header already stored)
+ memcpy(&conn->acl_recombination_buffer[conn->acl_recombination_pos], &packet[4], acl_length );
+ conn->acl_recombination_pos += acl_length;
+
+ // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u\n", acl_length,
+ // conn->acl_recombination_pos, conn->acl_recombination_length);
+
+ // forward complete L2CAP packet if complete.
+ if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header
+
+ hci_stack.packet_handler(HCI_ACL_DATA_PACKET, conn->acl_recombination_buffer, conn->acl_recombination_pos);
+ // reset recombination buffer
+ conn->acl_recombination_length = 0;
+ conn->acl_recombination_pos = 0;
+ }
+ break;
+
+ case 0x02: { // first fragment
+
+ // sanity check
+ if (conn->acl_recombination_pos) {
+ log_error( "ACL First Fragment but data in buffer for handle 0x%02x\n", con_handle);
+ return;
+ }
+
+ // peek into L2CAP packet!
+ uint16_t l2cap_length = READ_L2CAP_LENGTH( packet );
+
+ // log_error( "ACL First Fragment: acl_len %u, l2cap_len %u\n", acl_length, l2cap_length);
+
+ // compare fragment size to L2CAP packet size
+ if (acl_length >= l2cap_length + 4){
+
+ // forward fragment as L2CAP packet
+ hci_stack.packet_handler(HCI_ACL_DATA_PACKET, packet, acl_length + 4);
+
+ } else {
+ // store first fragment and tweak acl length for complete package
+ memcpy(conn->acl_recombination_buffer, packet, acl_length + 4);
+ conn->acl_recombination_pos = acl_length + 4;
+ conn->acl_recombination_length = l2cap_length;
+ bt_store_16(conn->acl_recombination_buffer, 2, l2cap_length +4);
+ }
+ break;
+
+ }
+ default:
+ log_error( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03);
+ return;
+ }
+
+ // execute main loop
+ hci_run();
+}
+
+static void hci_shutdown_connection(hci_connection_t *conn){
+ log_info("Connection closed: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address));
+
+ // cancel all l2cap connections
+ hci_emit_disconnection_complete(conn->con_handle, 0x16); // terminated by local host
+
+ run_loop_remove_timer(&conn->timeout);
+
+ linked_list_remove(&hci_stack.connections, (linked_item_t *) conn);
+ btstack_memory_hci_connection_free( conn );
+
+ // now it's gone
+ hci_emit_nr_connections_changed();
+}
+
+static const uint16_t packet_type_sizes[] = {
+ 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE,
+ HCI_ACL_DH1_SIZE, 0, 0, 0,
+ HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE,
+ HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE
+};
+
+static uint16_t hci_acl_packet_types_for_buffer_size(uint16_t buffer_size){
+ uint16_t packet_types = 0;
+ int i;
+ for (i=0;i<16;i++){
+ if (packet_type_sizes[i] == 0) continue;
+ if (packet_type_sizes[i] <= buffer_size){
+ packet_types |= 1 << i;
+ }
+ }
+ // flip bits for "may not be used"
+ packet_types ^= 0x3306;
+ return packet_types;
+}
+
+uint16_t hci_usable_acl_packet_types(void){
+ return hci_stack.packet_types;
+}
+
+uint8_t* hci_get_outgoing_acl_packet_buffer(void){
+ // hci packet buffer is >= acl data packet length
+ return hci_stack.hci_packet_buffer;
+}
+
+uint16_t hci_max_acl_data_packet_length(){
+ return hci_stack.acl_data_packet_length;
+}
+
+// avoid huge local variables
+#ifndef EMBEDDED
+static device_name_t device_name;
+#endif
+static void event_handler(uint8_t *packet, int size){
+ bd_addr_t addr;
+ uint8_t link_type;
+ hci_con_handle_t handle;
+ hci_connection_t * conn;
+ int i;
+
+ // printf("HCI:EVENT:%02x\n", packet[0]);
+
+ switch (packet[0]) {
+
+ case HCI_EVENT_COMMAND_COMPLETE:
+ // get num cmd packets
+ // log_info("HCI_EVENT_COMMAND_COMPLETE cmds old %u - new %u\n", hci_stack.num_cmd_packets, packet[2]);
+ hci_stack.num_cmd_packets = packet[2];
+
+ if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){
+ // from offset 5
+ // status
+ // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets"
+ hci_stack.acl_data_packet_length = READ_BT_16(packet, 6);
+ // ignore: SCO data packet len (8)
+ hci_stack.total_num_acl_packets = packet[9];
+ // ignore: total num SCO packets
+ if (hci_stack.state == HCI_STATE_INITIALIZING){
+ // determine usable ACL payload size
+ if (HCI_ACL_PAYLOAD_SIZE < hci_stack.acl_data_packet_length){
+ hci_stack.acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE;
+ }
+ // determine usable ACL packet types
+ hci_stack.packet_types = hci_acl_packet_types_for_buffer_size(hci_stack.acl_data_packet_length);
+
+ log_error("hci_read_buffer_size: used size %u, count %u, packet types %04x\n",
+ hci_stack.acl_data_packet_length, hci_stack.total_num_acl_packets, hci_stack.packet_types);
+ }
+ }
+ // Dump local address
+ if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)) {
+ bd_addr_t addr;
+ bt_flip_addr(addr, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1]);
+ log_info("Local Address, Status: 0x%02x: Addr: %s\n",
+ packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(addr));
+ }
+ if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){
+ hci_emit_discoverable_enabled(hci_stack.discoverable);
+ }
+ break;
+
+ case HCI_EVENT_COMMAND_STATUS:
+ // get num cmd packets
+ // log_info("HCI_EVENT_COMMAND_STATUS cmds - old %u - new %u\n", hci_stack.num_cmd_packets, packet[3]);
+ hci_stack.num_cmd_packets = packet[3];
+ break;
+
+ case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:
+ for (i=0; i<packet[2];i++){
+ handle = READ_BT_16(packet, 3 + 2*i);
+ uint16_t num_packets = READ_BT_16(packet, 3 + packet[2]*2 + 2*i);
+ conn = connection_for_handle(handle);
+ if (!conn){
+ log_error("hci_number_completed_packet lists unused con handle %u\n", handle);
+ continue;
+ }
+ conn->num_acl_packets_sent -= num_packets;
+ // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent);
+ }
+ break;
+
+ case HCI_EVENT_CONNECTION_REQUEST:
+ bt_flip_addr(addr, &packet[2]);
+ // TODO: eval COD 8-10
+ link_type = packet[11];
+ log_info("Connection_incoming: %s, type %u\n", bd_addr_to_str(addr), link_type);
+ if (link_type == 1) { // ACL
+ conn = connection_for_address(addr);
+ if (!conn) {
+ conn = create_connection_for_addr(addr);
+ }
+ if (!conn) {
+ // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D)
+ hci_stack.decline_reason = 0x0d;
+ BD_ADDR_COPY(hci_stack.decline_addr, addr);
+ break;
+ }
+ conn->state = RECEIVED_CONNECTION_REQUEST;
+ hci_run();
+ } else {
+ // SYNCHRONOUS CONNECTION LIMIT TO A DEVICE EXCEEDED (0X0A)
+ hci_stack.decline_reason = 0x0a;
+ BD_ADDR_COPY(hci_stack.decline_addr, addr);
+ }
+ break;
+
+ case HCI_EVENT_CONNECTION_COMPLETE:
+ // Connection management
+ bt_flip_addr(addr, &packet[5]);
+ log_info("Connection_complete (status=%u) %s\n", packet[2], bd_addr_to_str(addr));
+ conn = connection_for_address(addr);
+ if (conn) {
+ if (!packet[2]){
+ conn->state = OPEN;
+ conn->con_handle = READ_BT_16(packet, 3);
+
+ // restart timer
+ run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS);
+ run_loop_add_timer(&conn->timeout);
+
+ log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address));
+
+ hci_emit_nr_connections_changed();
+ } else {
+ // connection failed, remove entry
+ linked_list_remove(&hci_stack.connections, (linked_item_t *) conn);
+ btstack_memory_hci_connection_free( conn );
+
+ // if authentication error, also delete link key
+ if (packet[2] == 0x05) {
+ hci_drop_link_key_for_bd_addr(&addr);
+ }
+ }
+ }
+ break;
+
+ case HCI_EVENT_LINK_KEY_REQUEST:
+ log_info("HCI_EVENT_LINK_KEY_REQUEST\n");
+ hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST);
+ if (!hci_stack.remote_device_db) break;
+ hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST);
+ hci_run();
+ // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set
+ return;
+
+ case HCI_EVENT_LINK_KEY_NOTIFICATION:
+ hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_NOTIFICATION);
+ if (!hci_stack.remote_device_db) break;
+ bt_flip_addr(addr, &packet[2]);
+ hci_stack.remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8]);
+ // still forward event to allow dismiss of pairing dialog
+ break;
+
+ case HCI_EVENT_PIN_CODE_REQUEST:
+ hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_PIN_CODE_REQUEST);
+ // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key
+ if (!hci_stack.remote_device_db) break;
+ bt_flip_addr(addr, &packet[2]);
+ hci_stack.remote_device_db->delete_link_key(&addr);
+ break;
+
+#ifndef EMBEDDED
+ case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE:
+ if (!hci_stack.remote_device_db) break;
+ if (packet[2]) break; // status not ok
+ bt_flip_addr(addr, &packet[3]);
+ // fix for invalid remote names - terminate on 0xff
+ for (i=0; i<248;i++){
+ if (packet[9+i] == 0xff){
+ packet[9+i] = 0;
+ break;
+ }
+ }
+ memset(&device_name, 0, sizeof(device_name_t));
+ strncpy((char*) device_name, (char*) &packet[9], 248);
+ hci_stack.remote_device_db->put_name(&addr, &device_name);
+ break;
+
+ case HCI_EVENT_INQUIRY_RESULT:
+ case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI:
+ if (!hci_stack.remote_device_db) break;
+ // first send inq result packet
+ hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size);
+ // then send cached remote names
+ for (i=0; i<packet[2];i++){
+ bt_flip_addr(addr, &packet[3+i*6]);
+ if (hci_stack.remote_device_db->get_name(&addr, &device_name)){
+ hci_emit_remote_name_cached(&addr, &device_name);
+ }
+ }
+ return;
+#endif
+
+ case HCI_EVENT_DISCONNECTION_COMPLETE:
+ if (!packet[2]){
+ handle = READ_BT_16(packet, 3);
+ hci_connection_t * conn = connection_for_handle(handle);
+ if (conn) {
+ hci_shutdown_connection(conn);
+ }
+ }
+ break;
+
+ case HCI_EVENT_HARDWARE_ERROR:
+ if(hci_stack.control->hw_error){
+ (*hci_stack.control->hw_error)();
+ }
+ break;
+
+#ifdef HAVE_BLE
+ case HCI_EVENT_LE_META:
+ switch (packet[2]) {
+ case HCI_SUBEVENT_LE_CONNECTION_COMPLETE:
+ // Connection management
+ bt_flip_addr(addr, &packet[8]);
+ log_info("LE Connection_complete (status=%u) %s\n", packet[3], bd_addr_to_str(addr));
+ // LE connections are auto-accepted, so just create a connection if there isn't one already
+ conn = connection_for_address(addr);
+ if (packet[3]){
+ if (conn){
+ // outgoing connection failed, remove entry
+ linked_list_remove(&hci_stack.connections, (linked_item_t *) conn);
+ btstack_memory_hci_connection_free( conn );
+
+ }
+ // if authentication error, also delete link key
+ if (packet[3] == 0x05) {
+ hci_drop_link_key_for_bd_addr(&addr);
+ }
+ break;
+ }
+ if (!conn){
+ conn = create_connection_for_addr(addr);
+ }
+ if (!conn){
+ // no memory
+ break;
+ }
+
+ conn->state = OPEN;
+ conn->con_handle = READ_BT_16(packet, 4);
+
+ // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock
+
+ // restart timer
+ // run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS);
+ // run_loop_add_timer(&conn->timeout);
+
+ log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address));
+
+ hci_emit_nr_connections_changed();
+ break;
+
+ default:
+ break;
+ }
+ break;
+#endif
+
+ default:
+ break;
+ }
+
+ // handle BT initialization
+ if (hci_stack.state == HCI_STATE_INITIALIZING){
+ // handle H4 synchronization loss on restart
+ // if (hci_stack.substate == 1 && packet[0] == HCI_EVENT_HARDWARE_ERROR){
+ // hci_stack.substate = 0;
+ // }
+ // handle normal init sequence
+ if (hci_stack.substate % 2){
+ // odd: waiting for event
+ if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){
+ hci_stack.substate++;
+ }
+ }
+ }
+
+ // help with BT sleep
+ if (hci_stack.state == HCI_STATE_FALLING_ASLEEP
+ && hci_stack.substate == 1
+ && COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){
+ hci_stack.substate++;
+ }
+
+ hci_stack.packet_handler(HCI_EVENT_PACKET, packet, size);
+
+ // execute main loop
+ hci_run();
+}
+
+void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){
+ switch (packet_type) {
+ case HCI_EVENT_PACKET:
+ event_handler(packet, size);
+ break;
+ case HCI_ACL_DATA_PACKET:
+ acl_handler(packet, size);
+ break;
+ default:
+ break;
+ }
+}
+
+/** Register HCI packet handlers */
+void hci_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){
+ hci_stack.packet_handler = handler;
+}
+
+void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){
+
+ // reference to use transport layer implementation
+ hci_stack.hci_transport = transport;
+
+ // references to used control implementation
+ hci_stack.control = control;
+
+ // reference to used config
+ hci_stack.config = config;
+
+ // no connections yet
+ hci_stack.connections = NULL;
+ hci_stack.discoverable = 0;
+ hci_stack.connectable = 0;
+
+ // no pending cmds
+ hci_stack.decline_reason = 0;
+ hci_stack.new_scan_enable_value = 0xff;
+
+ // higher level handler
+ hci_stack.packet_handler = dummy_handler;
+
+ // store and open remote device db
+ hci_stack.remote_device_db = remote_device_db;
+ if (hci_stack.remote_device_db) {
+ hci_stack.remote_device_db->open();
+ }
+
+ // max acl payload size defined in config.h
+ hci_stack.acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE;
+
+ // register packet handlers with transport
+ transport->register_packet_handler(&packet_handler);
+
+ hci_stack.state = HCI_STATE_OFF;
+}
+
+void hci_close(){
+ // close remote device db
+ if (hci_stack.remote_device_db) {
+ hci_stack.remote_device_db->close();
+ }
+ while (hci_stack.connections) {
+ hci_shutdown_connection((hci_connection_t *) hci_stack.connections);
+}
+ hci_power_control(HCI_POWER_OFF);
+}
+
+// State-Module-Driver overview
+// state module low-level
+// HCI_STATE_OFF off close
+// HCI_STATE_INITIALIZING, on open
+// HCI_STATE_WORKING, on open
+// HCI_STATE_HALTING, on open
+// HCI_STATE_SLEEPING, off/sleep close
+// HCI_STATE_FALLING_ASLEEP on open
+
+static int hci_power_control_on(void){
+
+ // power on
+ int err = 0;
+ if (hci_stack.control && hci_stack.control->on){
+ err = (*hci_stack.control->on)(hci_stack.config);
+ }
+ if (err){
+ log_error( "POWER_ON failed\n");
+ hci_emit_hci_open_failed();
+ return err;
+ }
+
+ // open low-level device
+ err = hci_stack.hci_transport->open(hci_stack.config);
+ if (err){
+ log_error( "HCI_INIT failed, turning Bluetooth off again\n");
+ if (hci_stack.control && hci_stack.control->off){
+ (*hci_stack.control->off)(hci_stack.config);
+ }
+ hci_emit_hci_open_failed();
+ return err;
+ }
+ return 0;
+}
+
+static void hci_power_control_off(void){
+
+ log_info("hci_power_control_off\n");
+
+ // close low-level device
+ hci_stack.hci_transport->close(hci_stack.config);
+
+ log_info("hci_power_control_off - hci_transport closed\n");
+
+ // power off
+ if (hci_stack.control && hci_stack.control->off){
+ (*hci_stack.control->off)(hci_stack.config);
+ }
+
+ log_info("hci_power_control_off - control closed\n");
+
+ hci_stack.state = HCI_STATE_OFF;
+}
+
+static void hci_power_control_sleep(void){
+
+ log_info("hci_power_control_sleep\n");
+
+#if 0
+ // don't close serial port during sleep
+
+ // close low-level device
+ hci_stack.hci_transport->close(hci_stack.config);
+#endif
+
+ // sleep mode
+ if (hci_stack.control && hci_stack.control->sleep){
+ (*hci_stack.control->sleep)(hci_stack.config);
+ }
+
+ hci_stack.state = HCI_STATE_SLEEPING;
+}
+
+static int hci_power_control_wake(void){
+
+ log_info("hci_power_control_wake\n");
+
+ // wake on
+ if (hci_stack.control && hci_stack.control->wake){
+ (*hci_stack.control->wake)(hci_stack.config);
+ }
+
+#if 0
+ // open low-level device
+ int err = hci_stack.hci_transport->open(hci_stack.config);
+ if (err){
+ log_error( "HCI_INIT failed, turning Bluetooth off again\n");
+ if (hci_stack.control && hci_stack.control->off){
+ (*hci_stack.control->off)(hci_stack.config);
+ }
+ hci_emit_hci_open_failed();
+ return err;
+ }
+#endif
+
+ return 0;
+}
+
+
+int hci_power_control(HCI_POWER_MODE power_mode){
+
+ log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack.state);
+
+ int err = 0;
+ switch (hci_stack.state){
+
+ case HCI_STATE_OFF:
+ switch (power_mode){
+ case HCI_POWER_ON:
+ err = hci_power_control_on();
+ if (err) return err;
+ // set up state machine
+ hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent
+ hci_stack.state = HCI_STATE_INITIALIZING;
+ hci_stack.substate = 0;
+ break;
+ case HCI_POWER_OFF:
+ // do nothing
+ break;
+ case HCI_POWER_SLEEP:
+ // do nothing (with SLEEP == OFF)
+ break;
+ }
+ break;
+
+ case HCI_STATE_INITIALIZING:
+ switch (power_mode){
+ case HCI_POWER_ON:
+ // do nothing
+ break;
+ case HCI_POWER_OFF:
+ // no connections yet, just turn it off
+ hci_power_control_off();
+ break;
+ case HCI_POWER_SLEEP:
+ // no connections yet, just turn it off
+ hci_power_control_sleep();
+ break;
+ }
+ break;
+
+ case HCI_STATE_WORKING:
+ switch (power_mode){
+ case HCI_POWER_ON:
+ // do nothing
+ break;
+ case HCI_POWER_OFF:
+ // see hci_run
+ hci_stack.state = HCI_STATE_HALTING;
+ break;
+ case HCI_POWER_SLEEP:
+ // see hci_run
+ hci_stack.state = HCI_STATE_FALLING_ASLEEP;
+ hci_stack.substate = 0;
+ break;
+ }
+ break;
+
+ case HCI_STATE_HALTING:
+ switch (power_mode){
+ case HCI_POWER_ON:
+ // set up state machine
+ hci_stack.state = HCI_STATE_INITIALIZING;
+ hci_stack.substate = 0;
+ break;
+ case HCI_POWER_OFF:
+ // do nothing
+ break;
+ case HCI_POWER_SLEEP:
+ // see hci_run
+ hci_stack.state = HCI_STATE_FALLING_ASLEEP;
+ hci_stack.substate = 0;
+ break;
+ }
+ break;
+
+ case HCI_STATE_FALLING_ASLEEP:
+ switch (power_mode){
+ case HCI_POWER_ON:
+
+#if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL)
+ // nothing to do, if H4 supports power management
+ if (bt_control_iphone_power_management_enabled()){
+ hci_stack.state = HCI_STATE_INITIALIZING;
+ hci_stack.substate = 6;
+ break;
+ }
+#endif
+ // set up state machine
+ hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent
+ hci_stack.state = HCI_STATE_INITIALIZING;
+ hci_stack.substate = 0;
+ break;
+ case HCI_POWER_OFF:
+ // see hci_run
+ hci_stack.state = HCI_STATE_HALTING;
+ break;
+ case HCI_POWER_SLEEP:
+ // do nothing
+ break;
+ }
+ break;
+
+ case HCI_STATE_SLEEPING:
+ switch (power_mode){
+ case HCI_POWER_ON:
+
+#if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL)
+ // nothing to do, if H4 supports power management
+ if (bt_control_iphone_power_management_enabled()){
+ hci_stack.state = HCI_STATE_INITIALIZING;
+ hci_stack.substate = 6;
+ hci_update_scan_enable();
+ break;
+ }
+#endif
+ err = hci_power_control_wake();
+ if (err) return err;
+ // set up state machine
+ hci_stack.num_cmd_packets = 1; // assume that one cmd can be sent
+ hci_stack.state = HCI_STATE_INITIALIZING;
+ hci_stack.substate = 0;
+ break;
+ case HCI_POWER_OFF:
+ hci_stack.state = HCI_STATE_HALTING;
+ break;
+ case HCI_POWER_SLEEP:
+ // do nothing
+ break;
+ }
+ break;
+ }
+
+ // create internal event
+ hci_emit_state();
+
+ // trigger next/first action
+ hci_run();
+
+ return 0;
+}
+
+static void hci_update_scan_enable(void){
+ // 2 = page scan, 1 = inq scan
+ hci_stack.new_scan_enable_value = hci_stack.connectable << 1 | hci_stack.discoverable;
+ hci_run();
+}
+
+void hci_discoverable_control(uint8_t enable){
+ if (enable) enable = 1; // normalize argument
+
+ if (hci_stack.discoverable == enable){
+ hci_emit_discoverable_enabled(hci_stack.discoverable);
+ return;
+ }
+
+ hci_stack.discoverable = enable;
+ hci_update_scan_enable();
+}
+
+void hci_connectable_control(uint8_t enable){
+ if (enable) enable = 1; // normalize argument
+
+ // don't emit event
+ if (hci_stack.connectable == enable) return;
+
+ hci_stack.connectable = enable;
+ hci_update_scan_enable();
+}
+
+void hci_run(){
+
+ hci_connection_t * connection;
+ linked_item_t * it;
+
+ if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return;
+
+ // global/non-connection oriented commands
+
+ // decline incoming connections
+ if (hci_stack.decline_reason){
+ uint8_t reason = hci_stack.decline_reason;
+ hci_stack.decline_reason = 0;
+ hci_send_cmd(&hci_reject_connection_request, hci_stack.decline_addr, reason);
+ }
+
+ if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return;
+
+ // send scan enable
+ if (hci_stack.new_scan_enable_value != 0xff){
+ hci_send_cmd(&hci_write_scan_enable, hci_stack.new_scan_enable_value);
+ hci_stack.new_scan_enable_value = 0xff;
+ }
+
+ // send pending HCI commands
+ for (it = (linked_item_t *) hci_stack.connections; it ; it = it->next){
+
+ if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return;
+
+ connection = (hci_connection_t *) it;
+
+ if (connection->state == RECEIVED_CONNECTION_REQUEST){
+ log_info("sending hci_accept_connection_request\n");
+ hci_send_cmd(&hci_accept_connection_request, connection->address, 1);
+ connection->state = ACCEPTED_CONNECTION_REQUEST;
+ }
+
+ if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return;
+
+ if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){
+ link_key_t link_key;
+ log_info("responding to link key request\n");
+ if ( hci_stack.remote_device_db->get_link_key( &connection->address, &link_key)){
+ hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key);
+ } else {
+ hci_send_cmd(&hci_link_key_request_negative_reply, connection->address);
+ }
+ connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST);
+ }
+ }
+
+ if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return;
+
+ switch (hci_stack.state){
+ case HCI_STATE_INITIALIZING:
+ // log_info("hci_init: substate %u\n", hci_stack.substate);
+ if (hci_stack.substate % 2) {
+ // odd: waiting for command completion
+ return;
+ }
+ switch (hci_stack.substate >> 1){
+ case 0: // RESET
+ hci_send_cmd(&hci_reset);
+ if (hci_stack.config == 0 || ((hci_uart_config_t *)hci_stack.config)->baudrate_main == 0){
+ // skip baud change
+ hci_stack.substate = 4; // >> 1 = 2
+ }
+ break;
+ case 1: // SEND BAUD CHANGE
+ hci_stack.control->baudrate_cmd(hci_stack.config, ((hci_uart_config_t *)hci_stack.config)->baudrate_main, hci_stack.hci_packet_buffer);
+ hci_send_cmd_packet(hci_stack.hci_packet_buffer, 3 + hci_stack.hci_packet_buffer[2]);
+ break;
+ case 2: // LOCAL BAUD CHANGE
+ hci_stack.hci_transport->set_baudrate(((hci_uart_config_t *)hci_stack.config)->baudrate_main);
+ hci_stack.substate += 2;
+ // break missing here for fall through
+
+ case 3:
+ // custom initialization
+ if (hci_stack.control && hci_stack.control->next_cmd){
+ int valid_cmd = (*hci_stack.control->next_cmd)(hci_stack.config, hci_stack.hci_packet_buffer);
+ if (valid_cmd){
+ int size = 3 + hci_stack.hci_packet_buffer[2];
+ hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack.hci_packet_buffer, size);
+ hci_stack.substate = 4; // more init commands
+ break;
+ }
+ log_info("hci_run: init script done\n\r");
+ }
+ // otherwise continue
+ hci_send_cmd(&hci_read_bd_addr);
+ break;
+ case 4:
+ hci_send_cmd(&hci_read_buffer_size);
+ break;
+ case 5:
+ // ca. 15 sec
+ hci_send_cmd(&hci_write_page_timeout, 0x6000);
+ break;
+ case 6:
+ hci_send_cmd(&hci_write_scan_enable, (hci_stack.connectable << 1) | hci_stack.discoverable); // page scan
+ break;
+ case 7:
+#ifndef EMBEDDED
+ {
+ char hostname[30];
+ gethostname(hostname, 30);
+ hostname[29] = '\0';
+ hci_send_cmd(&hci_write_local_name, hostname);
+ break;
+ }
+ case 8:
+#ifdef USE_BLUETOOL
+ hci_send_cmd(&hci_write_class_of_device, 0x007a020c); // Smartphone
+ break;
+
+ case 9:
+#endif
+#endif
+ // done.
+ hci_stack.state = HCI_STATE_WORKING;
+ hci_emit_state();
+ break;
+ default:
+ break;
+ }
+ hci_stack.substate++;
+ break;
+
+ case HCI_STATE_HALTING:
+
+ log_info("HCI_STATE_HALTING\n");
+ // close all open connections
+ connection = (hci_connection_t *) hci_stack.connections;
+ if (connection){
+
+ // send disconnect
+ if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return;
+
+ log_info("HCI_STATE_HALTING, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle);
+ hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection
+
+ // send disconnected event right away - causes higher layer connections to get closed, too.
+ hci_shutdown_connection(connection);
+ return;
+ }
+ log_info("HCI_STATE_HALTING, calling off\n");
+
+ // switch mode
+ hci_power_control_off();
+
+ log_info("HCI_STATE_HALTING, emitting state\n");
+ hci_emit_state();
+ log_info("HCI_STATE_HALTING, done\n");
+ break;
+
+ case HCI_STATE_FALLING_ASLEEP:
+ switch(hci_stack.substate) {
+ case 0:
+ log_info("HCI_STATE_FALLING_ASLEEP\n");
+ // close all open connections
+ connection = (hci_connection_t *) hci_stack.connections;
+
+#if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL)
+ // don't close connections, if H4 supports power management
+ if (bt_control_iphone_power_management_enabled()){
+ connection = NULL;
+ }
+#endif
+ if (connection){
+
+ // send disconnect
+ if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return;
+
+ log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u\n", connection, (uint16_t)connection->con_handle);
+ hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection
+
+ // send disconnected event right away - causes higher layer connections to get closed, too.
+ hci_shutdown_connection(connection);
+ return;
+ }
+
+ // disable page and inquiry scan
+ if (!hci_can_send_packet_now(HCI_COMMAND_DATA_PACKET)) return;
+
+ log_info("HCI_STATE_HALTING, disabling inq cans\n");
+ hci_send_cmd(&hci_write_scan_enable, hci_stack.connectable << 1); // drop inquiry scan but keep page scan
+
+ // continue in next sub state
+ hci_stack.substate++;
+ break;
+ case 1:
+ // wait for command complete "hci_write_scan_enable" in event_handler();
+ break;
+ case 2:
+ log_info("HCI_STATE_HALTING, calling sleep\n");
+#if defined(USE_POWERMANAGEMENT) && defined(USE_BLUETOOL)
+ // don't actually go to sleep, if H4 supports power management
+ if (bt_control_iphone_power_management_enabled()){
+ // SLEEP MODE reached
+ hci_stack.state = HCI_STATE_SLEEPING;
+ hci_emit_state();
+ break;
+ }
+#endif
+ // switch mode
+ hci_power_control_sleep(); // changes hci_stack.state to SLEEP
+ hci_emit_state();
+ break;
+
+ default:
+ break;
+ }
+ break;
+
+ default:
+ break;
+ }
+}
+
+int hci_send_cmd_packet(uint8_t *packet, int size){
+ bd_addr_t addr;
+ hci_connection_t * conn;
+ // house-keeping
+
+ // create_connection?
+ if (IS_COMMAND(packet, hci_create_connection)){
+ bt_flip_addr(addr, &packet[3]);
+ log_info("Create_connection to %s\n", bd_addr_to_str(addr));
+ conn = connection_for_address(addr);
+ if (conn) {
+ // if connection exists
+ if (conn->state == OPEN) {
+ // and OPEN, emit connection complete command
+ hci_emit_connection_complete(conn, 0);
+ }
+ // otherwise, just ignore as it is already in the open process
+ return 0; // don't sent packet to controller
+
+ }
+ // create connection struct and register, state = SENT_CREATE_CONNECTION
+ conn = create_connection_for_addr(addr);
+ if (!conn){
+ // notify client that alloc failed
+ hci_emit_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED);
+ return 0; // don't sent packet to controller
+ }
+ conn->state = SENT_CREATE_CONNECTION;
+ }
+
+ if (IS_COMMAND(packet, hci_link_key_request_reply)){
+ hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY);
+ }
+ if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){
+ hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST);
+ }
+ if (IS_COMMAND(packet, hci_pin_code_request_reply)){
+ hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_REPLY);
+ }
+ if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)){
+ hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_PIN_CODE_NEGATIVE_REPLY);
+ }
+
+ if (IS_COMMAND(packet, hci_delete_stored_link_key)){
+ if (hci_stack.remote_device_db){
+ bt_flip_addr(addr, &packet[3]);
+ hci_stack.remote_device_db->delete_link_key(&addr);
+ }
+ }
+
+ hci_stack.num_cmd_packets--;
+ return hci_stack.hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size);
+}
+
+/**
+ * pre: numcmds >= 0 - it's allowed to send a command to the controller
+ */
+int hci_send_cmd(const hci_cmd_t *cmd, ...){
+ va_list argptr;
+ va_start(argptr, cmd);
+ uint16_t size = hci_create_cmd_internal(hci_stack.hci_packet_buffer, cmd, argptr);
+ va_end(argptr);
+ return hci_send_cmd_packet(hci_stack.hci_packet_buffer, size);
+}
+
+// Create various non-HCI events.
+// TODO: generalize, use table similar to hci_create_command
+
+void hci_emit_state(){
+ uint8_t event[3];
+ event[0] = BTSTACK_EVENT_STATE;
+ event[1] = sizeof(event) - 2;
+ event[2] = hci_stack.state;
+ hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event));
+ hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event));
+}
+
+void hci_emit_connection_complete(hci_connection_t *conn, uint8_t status){
+ uint8_t event[13];
+ event[0] = HCI_EVENT_CONNECTION_COMPLETE;
+ event[1] = sizeof(event) - 2;
+ event[2] = status;
+ bt_store_16(event, 3, conn->con_handle);
+ bt_flip_addr(&event[5], conn->address);
+ event[11] = 1; // ACL connection
+ event[12] = 0; // encryption disabled
+ hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event));
+ hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event));
+}
+
+void hci_emit_disconnection_complete(uint16_t handle, uint8_t reason){
+ uint8_t event[6];
+ event[0] = HCI_EVENT_DISCONNECTION_COMPLETE;
+ event[1] = sizeof(event) - 2;
+ event[2] = 0; // status = OK
+ bt_store_16(event, 3, handle);
+ event[5] = reason;
+ hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event));
+ hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event));
+}
+
+void hci_emit_l2cap_check_timeout(hci_connection_t *conn){
+ uint8_t event[4];
+ event[0] = L2CAP_EVENT_TIMEOUT_CHECK;
+ event[1] = sizeof(event) - 2;
+ bt_store_16(event, 2, conn->con_handle);
+ hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event));
+ hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event));
+}
+
+void hci_emit_nr_connections_changed(){
+ uint8_t event[3];
+ event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED;
+ event[1] = sizeof(event) - 2;
+ event[2] = nr_hci_connections();
+ hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event));
+ hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event));
+}
+
+void hci_emit_hci_open_failed(){
+ uint8_t event[2];
+ event[0] = BTSTACK_EVENT_POWERON_FAILED;
+ event[1] = sizeof(event) - 2;
+ hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event));
+ hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event));
+}
+
+#ifndef EMBEDDED
+void hci_emit_btstack_version() {
+ uint8_t event[6];
+ event[0] = BTSTACK_EVENT_VERSION;
+ event[1] = sizeof(event) - 2;
+ event[2] = BTSTACK_MAJOR;
+ event[3] = BTSTACK_MINOR;
+ bt_store_16(event, 4, BTSTACK_REVISION);
+ hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event));
+ hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event));
+}
+#endif
+
+void hci_emit_system_bluetooth_enabled(uint8_t enabled){
+ uint8_t event[3];
+ event[0] = BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED;
+ event[1] = sizeof(event) - 2;
+ event[2] = enabled;
+ hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event));
+ hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event));
+}
+
+void hci_emit_remote_name_cached(bd_addr_t *addr, device_name_t *name){
+ uint8_t event[2+1+6+248];
+ event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED;
+ event[1] = sizeof(event) - 2;
+ event[2] = 0; // just to be compatible with HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE
+ bt_flip_addr(&event[3], *addr);
+ memcpy(&event[9], name, 248);
+ hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event));
+ hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event));
+}
+
+void hci_emit_discoverable_enabled(uint8_t enabled){
+ uint8_t event[3];
+ event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED;
+ event[1] = sizeof(event) - 2;
+ event[2] = enabled;
+ hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event));
+ hci_stack.packet_handler(HCI_EVENT_PACKET, event, sizeof(event));
+}