btstack/src/hci.c

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/*
* 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
*
*/
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/*
* hci.c
*
* Created by Matthias Ringwald on 4/29/09.
*
*/
#include "btstack-config.h"
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#include "hci.h"
#include "gap.h"
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#include <stdarg.h>
#include <string.h>
#include <stdio.h>
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#ifndef EMBEDDED
#include <unistd.h> // gethostbyname
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#include <btstack/version.h>
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#endif
#include "btstack_memory.h"
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#include "debug.h"
#include "hci_dump.h"
#include <btstack/hci_cmds.h>
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#define HCI_CONNECTION_TIMEOUT_MS 10000
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#define HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP 11
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#ifdef USE_BLUETOOL
#include "bt_control_iphone.h"
#endif
static void hci_update_scan_enable(void);
static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection);
static void hci_connection_timeout_handler(timer_source_t *timer);
static void hci_connection_timestamp(hci_connection_t *connection);
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static int hci_power_control_on(void);
static void hci_power_control_off(void);
static void hci_state_reset();
// the STACK is here
#ifndef HAVE_MALLOC
static hci_stack_t hci_stack_static;
#endif
static hci_stack_t * hci_stack = NULL;
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// test helper
static uint8_t disable_l2cap_timeouts = 0;
/**
* create connection for given address
*
* @return connection OR NULL, if no memory left
*/
static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){
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log_info("create_connection_for_addr %s", bd_addr_to_str(addr));
hci_connection_t * conn = (hci_connection_t *) btstack_memory_hci_connection_get();
if (!conn) return NULL;
BD_ADDR_COPY(conn->address, addr);
conn->address_type = addr_type;
conn->con_handle = 0xffff;
conn->authentication_flags = AUTH_FLAGS_NONE;
conn->bonding_flags = 0;
conn->requested_security_level = LEVEL_0;
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;
}
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/**
* get connection for a given handle
*
* @return connection OR NULL, if not found
*/
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hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){
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linked_item_t *it;
for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){
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if ( ((hci_connection_t *) it)->con_handle == con_handle){
return (hci_connection_t *) it;
}
}
return NULL;
}
/**
* get connection for given address
*
* @return connection OR NULL, if not found
*/
hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t * addr, bd_addr_type_t addr_type){
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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 (connection->address_type != addr_type) continue;
if (memcmp(addr, connection->address, 6) != 0) continue;
return connection;
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}
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);
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#ifdef HAVE_TIME
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struct timeval tv;
gettimeofday(&tv, NULL);
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if (tv.tv_sec >= connection->timestamp.tv_sec + HCI_CONNECTION_TIMEOUT_MS/1000) {
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// connections might be timed out
hci_emit_l2cap_check_timeout(connection);
}
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#endif
#ifdef HAVE_TICK
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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);
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run_loop_add_timer(timer);
}
static void hci_connection_timestamp(hci_connection_t *connection){
#ifdef HAVE_TIME
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gettimeofday(&connection->timestamp, NULL);
#endif
#ifdef HAVE_TICK
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connection->timestamp = embedded_get_ticks();
#endif
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}
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
* @note: assumes classic connection
*/
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 = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC);
if (conn) {
connectionSetAuthenticationFlags(conn, flags);
hci_connection_timestamp(conn);
}
}
int hci_authentication_active_for_handle(hci_con_handle_t handle){
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hci_connection_t * conn = hci_connection_for_handle(handle);
if (!conn) return 0;
if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1;
if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1;
return 0;
}
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);
}
}
int hci_is_le_connection(hci_connection_t * connection){
return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC ||
connection->address_type == BD_ADDR_TYPE_LE_RANDOM;
}
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/**
* count connections
*/
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static int nr_hci_connections(void){
int count = 0;
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linked_item_t *it;
for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next, count++);
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return count;
}
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/**
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* Dummy handler called by HCI
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*/
static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){
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}
uint8_t hci_number_outgoing_packets(hci_con_handle_t handle){
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hci_connection_t * connection = hci_connection_for_handle(handle);
if (!connection) {
log_error("hci_number_outgoing_packets: connection for handle %u does not exist!\n", handle);
return 0;
}
return connection->num_acl_packets_sent;
}
uint8_t hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){
int num_packets_sent_classic = 0;
int num_packets_sent_le = 0;
bd_addr_type_t address_type = BD_ADDR_TYPE_UNKNOWN;
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 (connection->address_type == BD_ADDR_TYPE_CLASSIC){
num_packets_sent_classic += connection->num_acl_packets_sent;
} else {
num_packets_sent_le += connection->num_acl_packets_sent;
}
if (connection->con_handle == con_handle){
address_type = connection->address_type;
}
}
int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic;
int free_slots_le = 0;
if (free_slots_classic < 0){
log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)\n", num_packets_sent_classic, hci_stack->acl_packets_total_num);
return 0;
}
if (hci_stack->le_acl_packets_total_num){
// if we have LE slots, they are used
free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le;
if (free_slots_le < 0){
log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)\n", num_packets_sent_le, hci_stack->le_acl_packets_total_num);
return 0;
}
} else {
// otherwise, classic slots are used for LE, too
free_slots_classic -= num_packets_sent_le;
if (free_slots_classic < 0){
log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)\n", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num);
return 0;
}
}
switch (address_type){
case BD_ADDR_TYPE_UNKNOWN:
log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list\n", con_handle);
return 0;
case BD_ADDR_TYPE_CLASSIC:
return free_slots_classic;
default:
return free_slots_le;
}
}
// @deprecated
int hci_can_send_packet_now(uint8_t packet_type){
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switch (packet_type) {
case HCI_ACL_DATA_PACKET:
return hci_can_send_prepared_acl_packet_now(0);
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case HCI_COMMAND_DATA_PACKET:
return hci_can_send_command_packet_now();
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default:
return 0;
}
}
// @deprecated
// same as hci_can_send_packet_now, but also checks if packet buffer is free for use
int hci_can_send_packet_now_using_packet_buffer(uint8_t packet_type){
if (hci_stack->hci_packet_buffer_reserved) return 0;
switch (packet_type) {
case HCI_ACL_DATA_PACKET:
return hci_can_send_acl_packet_now(0);
case HCI_COMMAND_DATA_PACKET:
return hci_can_send_command_packet_now();
default:
return 0;
}
}
// new functions replacing hci_can_send_packet_now[_using_packet_buffer]
int hci_can_send_command_packet_now(void){
if (hci_stack->hci_packet_buffer_reserved) return 0;
// check for async hci transport implementations
if (hci_stack->hci_transport->can_send_packet_now){
if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){
return 0;
}
}
return hci_stack->num_cmd_packets > 0;
}
int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) {
// check for async hci transport implementations
if (hci_stack->hci_transport->can_send_packet_now){
if (!hci_stack->hci_transport->can_send_packet_now(HCI_ACL_DATA_PACKET)){
return 0;
}
}
return hci_number_free_acl_slots_for_handle(con_handle) > 0;
}
int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){
if (hci_stack->hci_packet_buffer_reserved) return 0;
return hci_can_send_prepared_acl_packet_now(con_handle);
}
// used for internal checks in l2cap[-le].c
int hci_is_packet_buffer_reserved(void){
return hci_stack->hci_packet_buffer_reserved;
}
// reserves outgoing packet buffer. @returns 1 if successful
int hci_reserve_packet_buffer(void){
if (hci_stack->hci_packet_buffer_reserved) {
log_error("hci_reserve_packet_buffer called but buffer already reserved");
return 0;
}
hci_stack->hci_packet_buffer_reserved = 1;
return 1;
}
void hci_release_packet_buffer(void){
hci_stack->hci_packet_buffer_reserved = 0;
}
// assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call
int hci_transport_synchronous(void){
return hci_stack->hci_transport->can_send_packet_now == NULL;
}
// pre: caller has reserved the packet buffer
int hci_send_acl_packet_buffer(int size){
if (!hci_stack->hci_packet_buffer_reserved) {
log_error("hci_send_acl_packet_buffer called without reserving packet buffer");
return 0;
}
uint8_t * packet = hci_stack->hci_packet_buffer;
hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet);
// check for free places on Bluetooth module
if (!hci_can_send_prepared_acl_packet_now(con_handle)) {
log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller");
hci_release_packet_buffer();
return BTSTACK_ACL_BUFFERS_FULL;
}
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hci_connection_t *connection = hci_connection_for_handle( con_handle);
if (!connection) {
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log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle);
hci_release_packet_buffer();
return 0;
}
hci_connection_timestamp(connection);
// count packet
connection->num_acl_packets_sent++;
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// log_info("hci_send_acl_packet - handle %u, sent %u\n", connection->con_handle, connection->num_acl_packets_sent);
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// send packet
int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size);
// free packet buffer for synchronous transport implementations
if (hci_transport_synchronous()){
hci_release_packet_buffer();
}
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return err;
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}
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static void acl_handler(uint8_t *packet, int size){
// log_info("acl_handler: size %u", size);
// get info
hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet);
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hci_connection_t *conn = hci_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){
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log_error( "hci.c: acl_handler called with non-registered handle %u!\n" , con_handle);
return;
}
// assert packet is complete
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if (acl_length + 4 != size){
log_error("hci.c: acl_handler called with ACL packet of wrong size %u, expected %u => dropping packet", size, acl_length + 4);
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) {
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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;
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// 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) {
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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_info( "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:
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log_error( "hci.c: acl_handler called with invalid packet boundary flags %u\n", acl_flags & 0x03);
return;
}
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// execute main loop
hci_run();
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}
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static void hci_shutdown_connection(hci_connection_t *conn){
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log_info("Connection closed: handle 0x%x, %s\n", conn->con_handle, bd_addr_to_str(conn->address));
run_loop_remove_timer(&conn->timeout);
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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 const uint8_t packet_type_feature_requirement_bit[] = {
0, // 3 slot packets
1, // 5 slot packets
25, // EDR 2 mpbs
26, // EDR 3 mbps
39, // 3 slot EDR packts
40, // 5 slot EDR packet
};
static const uint16_t packet_type_feature_packet_mask[] = {
0x0f00, // 3 slot packets
0xf000, // 5 slot packets
0x1102, // EDR 2 mpbs
0x2204, // EDR 3 mbps
0x0300, // 3 slot EDR packts
0x3000, // 5 slot EDR packet
};
static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){
// enable packet types based on 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;
}
}
// disable packet types due to missing local supported features
for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){
int bit_idx = packet_type_feature_requirement_bit[i];
int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0;
if (feature_set) continue;
log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]);
packet_types &= ~packet_type_feature_packet_mask[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_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(void){
return hci_stack->acl_data_packet_length;
}
int hci_non_flushable_packet_boundary_flag_supported(void){
// No. 54, byte 6, bit 6
return (hci_stack->local_supported_features[6] & (1 << 6)) != 0;
}
int hci_ssp_supported(void){
// No. 51, byte 6, bit 3
return (hci_stack->local_supported_features[6] & (1 << 3)) != 0;
}
int hci_classic_supported(void){
// No. 37, byte 4, bit 5, = No BR/EDR Support
return (hci_stack->local_supported_features[4] & (1 << 5)) == 0;
}
int hci_le_supported(void){
#ifdef HAVE_BLE
// No. 37, byte 4, bit 6 = LE Supported (Controller)
return (hci_stack->local_supported_features[4] & (1 << 6)) != 0;
#else
return 0;
#endif
}
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// get addr type and address used in advertisement packets
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void hci_le_advertisement_address(uint8_t * addr_type, bd_addr_t * addr){
*addr_type = hci_stack->adv_addr_type;
if (hci_stack->adv_addr_type){
memcpy(addr, hci_stack->adv_address, 6);
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} else {
memcpy(addr, hci_stack->local_bd_addr, 6);
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}
}
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#ifdef HAVE_BLE
void le_handle_advertisement_report(uint8_t *packet, int size){
int num_reports = packet[3];
int i;
int total_data_length = 0;
int data_offset = 0;
for (i=0; i<num_reports;i++){
total_data_length += packet[4+num_reports*8+i];
}
log_info("num reports: %d, ", num_reports);
for (i=0; i<num_reports;i++){
int pos = 0;
uint8_t data_length = packet[4+num_reports*8+i];
uint8_t event_size = 10 + data_length;
uint8_t event[2 + event_size ];
event[pos++] = GAP_LE_ADVERTISING_REPORT;
event[pos++] = event_size;
event[pos++] = packet[4+i]; // event_type;
event[pos++] = packet[4+num_reports+i]; // address_type;
memcpy(&event[pos], &packet[4+num_reports*2+i*6], 6); // bt address
pos += 6;
event[pos++] = packet[4+num_reports*9+total_data_length + i];
log_info("rssi: %d, ", event[pos-1]);
event[pos++] = data_length;
2014-05-16 22:35:59 +00:00
memcpy(&event[pos], &packet[4+num_reports*9+data_offset], data_length);
data_offset += data_length;
pos += data_length;
hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event));
}
}
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#endif
static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){
uint8_t command_completed = 0;
if ((hci_stack->substate % 2) == 0) return;
// odd: waiting for event
if (packet[0] == HCI_EVENT_COMMAND_COMPLETE){
uint16_t opcode = READ_BT_16(packet,3);
if (opcode == hci_stack->last_cmd_opcode){
command_completed = 1;
log_info("Command complete for expected opcode %04x -> new substate %u", opcode, hci_stack->substate);
} else {
log_info("Command complete for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode);
}
}
if (packet[0] == HCI_EVENT_COMMAND_STATUS){
uint8_t status = packet[2];
uint16_t opcode = READ_BT_16(packet,4);
if (opcode == hci_stack->last_cmd_opcode){
if (status){
command_completed = 1;
log_error("Command status error 0x%02x for expected opcode %04x -> new substate %u", status, opcode, hci_stack->substate);
} else {
log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode);
}
} else {
log_info("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode);
}
}
if (!command_completed) return;
switch(hci_stack->substate >> 1){
default:
hci_stack->substate++;
break;
}
}
static void hci_initializing_state_machine(){
// 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_state_reset();
hci_send_cmd(&hci_reset);
if (hci_stack->config == NULL || ((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_stack->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0);
hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]);
break;
case 2: // LOCAL BAUD CHANGE
log_info("Local baud rate 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:
log_info("Custom init");
// 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->last_cmd_opcode = READ_BT_16(hci_stack->hci_packet_buffer, 0);
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:
hci_send_cmd(&hci_read_local_supported_features);
break;
case 6:
if (hci_le_supported()){
hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF);
} else {
// Kensington Bluetoot 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff...
hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF);
}
// skip Classic init commands for LE only chipsets
if (!hci_classic_supported()){
if (hci_le_supported()){
hci_stack->substate = 11 << 1; // skip all classic command
} else {
log_error("Neither BR/EDR nor LE supported");
hci_stack->substate = 14 << 1; // skip all
}
}
break;
case 7:
if (hci_ssp_supported()){
hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable);
break;
}
hci_stack->substate += 2;
// break missing here for fall through
case 8:
// ca. 15 sec
hci_send_cmd(&hci_write_page_timeout, 0x6000);
break;
case 9:
hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device);
break;
case 10:
if (hci_stack->local_name){
hci_send_cmd(&hci_write_local_name, hci_stack->local_name);
} else {
char hostname[30];
#ifdef EMBEDDED
// BTstack-11:22:33:44:55:66
strcpy(hostname, "BTstack ");
strcat(hostname, bd_addr_to_str(hci_stack->local_bd_addr));
log_info("---> Name %s", hostname);
#else
// hostname for POSIX systems
gethostname(hostname, 30);
hostname[29] = '\0';
#endif
hci_send_cmd(&hci_write_local_name, hostname);
}
break;
case 11:
hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan
if (!hci_le_supported()){
// SKIP LE init for Classic only configuration
hci_stack->substate = 14 << 1;
}
break;
#ifdef HAVE_BLE
// LE INIT
case 12:
hci_send_cmd(&hci_le_read_buffer_size);
break;
case 13:
// LE Supported Host = 1, Simultaneous Host = 0
hci_send_cmd(&hci_write_le_host_supported, 1, 0);
break;
case 14:
// LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs
hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0);
break;
#endif
// DONE
case 15:
// done.
hci_stack->state = HCI_STATE_WORKING;
hci_emit_state();
break;
default:
break;
}
hci_stack->substate++;
}
// avoid huge local variables
#ifndef EMBEDDED
static device_name_t device_name;
#endif
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static void event_handler(uint8_t *packet, int size){
uint16_t event_length = packet[1];
// assert packet is complete
if (size != event_length + 2){
log_error("hci.c: event_handler called with event packet of wrong size %u, expected %u => dropping packet", size, event_length + 2);
return;
}
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bd_addr_t addr;
bd_addr_type_t addr_type;
uint8_t link_type;
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hci_con_handle_t handle;
2010-01-25 20:25:20 +00:00
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];
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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->acl_packets_total_num = 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;
}
log_info("hci_read_buffer_size: used size %u, count %u\n",
hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num);
}
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}
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#ifdef HAVE_BLE
if (COMMAND_COMPLETE_EVENT(packet, hci_le_read_buffer_size)){
hci_stack->le_data_packet_length = READ_BT_16(packet, 6);
hci_stack->le_acl_packets_total_num = packet[8];
log_info("hci_le_read_buffer_size: size %u, count %u\n", hci_stack->le_data_packet_length, hci_stack->le_acl_packets_total_num);
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}
#endif
2011-11-26 19:43:08 +00:00
// Dump local address
if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)) {
bt_flip_addr(hci_stack->local_bd_addr, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1]);
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log_info("Local Address, Status: 0x%02x: Addr: %s\n",
packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr));
2011-11-26 19:43:08 +00:00
}
if (COMMAND_COMPLETE_EVENT(packet, hci_write_scan_enable)){
hci_emit_discoverable_enabled(hci_stack->discoverable);
}
// Note: HCI init checks
if (COMMAND_COMPLETE_EVENT(packet, hci_read_local_supported_features)){
memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8);
log_info("Local Supported Features: 0x%02x%02x%02x%02x%02x%02x%02x%02x",
hci_stack->local_supported_features[0], hci_stack->local_supported_features[1],
hci_stack->local_supported_features[2], hci_stack->local_supported_features[3],
hci_stack->local_supported_features[4], hci_stack->local_supported_features[5],
hci_stack->local_supported_features[6], hci_stack->local_supported_features[7]);
// determine usable ACL packet types based buffer size and supported features
hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(hci_stack->acl_data_packet_length, &hci_stack->local_supported_features[0]);
log_info("packet types %04x", hci_stack->packet_types);
// Classic/LE
log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported());
}
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:{
int offset = 3;
for (i=0; i<packet[2];i++){
handle = READ_BT_16(packet, offset);
offset += 2;
uint16_t num_packets = READ_BT_16(packet, offset);
offset += 2;
2013-11-01 21:50:25 +00:00
conn = hci_connection_for_handle(handle);
if (!conn){
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log_error("hci_number_completed_packet lists unused con handle %u\n", handle);
continue;
}
conn->num_acl_packets_sent -= num_packets;
2011-07-22 18:31:02 +00:00
// log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u\n", num_packets, handle, conn->num_acl_packets_sent);
}
break;
}
2010-01-25 20:25:20 +00:00
case HCI_EVENT_CONNECTION_REQUEST:
2010-01-25 20:53:43 +00:00
bt_flip_addr(addr, &packet[2]);
// TODO: eval COD 8-10
link_type = packet[11];
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log_info("Connection_incoming: %s, type %u\n", bd_addr_to_str(addr), link_type);
2010-01-25 20:53:43 +00:00
if (link_type == 1) { // ACL
conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC);
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if (!conn) {
conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC);
2010-01-25 20:53:43 +00:00
}
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();
2010-01-25 20:53:43 +00:00
} else {
// SYNCHRONOUS CONNECTION LIMIT TO A DEVICE EXCEEDED (0X0A)
hci_stack->decline_reason = 0x0a;
BD_ADDR_COPY(hci_stack->decline_addr, addr);
2010-01-25 20:25:20 +00:00
}
break;
case HCI_EVENT_CONNECTION_COMPLETE:
// Connection management
bt_flip_addr(addr, &packet[5]);
2011-07-27 22:03:34 +00:00
log_info("Connection_complete (status=%u) %s\n", packet[2], bd_addr_to_str(addr));
addr_type = BD_ADDR_TYPE_CLASSIC;
conn = hci_connection_for_bd_addr_and_type(&addr, addr_type);
if (conn) {
if (!packet[2]){
conn->state = OPEN;
conn->con_handle = READ_BT_16(packet, 3);
conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES;
2011-07-25 21:12:09 +00:00
// restart timer
run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS);
run_loop_add_timer(&conn->timeout);
2011-07-25 21:12:09 +00:00
2011-07-27 22:03:34 +00:00
log_info("New connection: handle %u, %s\n", conn->con_handle, bd_addr_to_str(conn->address));
hci_emit_nr_connections_changed();
} else {
// notify client if dedicated bonding
if (conn->bonding_flags & BONDING_DEDICATED){
hci_emit_dedicated_bonding_result(conn, packet[2]);
}
// 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_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE:
handle = READ_BT_16(packet, 3);
conn = hci_connection_for_handle(handle);
if (!conn) break;
if (!packet[2]){
uint8_t * features = &packet[5];
if (features[6] & (1 << 3)){
conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP;
}
}
conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES;
log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x", conn->bonding_flags);
if (conn->bonding_flags & BONDING_DEDICATED){
conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST;
}
break;
case HCI_EVENT_LINK_KEY_REQUEST:
2011-07-22 18:31:02 +00:00
log_info("HCI_EVENT_LINK_KEY_REQUEST\n");
hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST);
// non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST
if (hci_stack->bondable && !hci_stack->remote_device_db) break;
hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST);
2011-06-21 20:28:09 +00:00
hci_run();
// request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set
return;
case HCI_EVENT_LINK_KEY_NOTIFICATION: {
bt_flip_addr(addr, &packet[2]);
conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC);
if (!conn) break;
conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION;
link_key_type_t link_key_type = (link_key_type_t)packet[24];
// Change Connection Encryption keeps link key type
if (link_key_type != CHANGED_COMBINATION_KEY){
conn->link_key_type = link_key_type;
}
if (!hci_stack->remote_device_db) break;
hci_stack->remote_device_db->put_link_key(&addr, (link_key_t *) &packet[8], conn->link_key_type);
// 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], LEGACY_PAIRING_ACTIVE);
// non-bondable mode: pin code negative reply will be sent
if (!hci_stack->bondable){
hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST);
hci_run();
return;
}
// 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;
case HCI_EVENT_IO_CAPABILITY_REQUEST:
hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST);
hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY);
break;
case HCI_EVENT_USER_CONFIRMATION_REQUEST:
hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE);
if (!hci_stack->ssp_auto_accept) break;
hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY);
break;
case HCI_EVENT_USER_PASSKEY_REQUEST:
hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE);
if (!hci_stack->ssp_auto_accept) break;
hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY);
break;
2014-01-16 16:16:28 +00:00
case HCI_EVENT_ENCRYPTION_CHANGE:
handle = READ_BT_16(packet, 3);
conn = hci_connection_for_handle(handle);
if (!conn) break;
if (packet[2] == 0) {
if (packet[5]){
conn->authentication_flags |= CONNECTION_ENCRYPTED;
} else {
conn->authentication_flags &= ~CONNECTION_ENCRYPTED;
}
2014-01-16 16:16:28 +00:00
}
hci_emit_security_level(handle, gap_security_level_for_connection(conn));
2014-01-16 16:16:28 +00:00
break;
case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT:
handle = READ_BT_16(packet, 3);
conn = hci_connection_for_handle(handle);
if (!conn) break;
// dedicated bonding: send result and disconnect
if (conn->bonding_flags & BONDING_DEDICATED){
conn->bonding_flags &= ~BONDING_DEDICATED;
hci_emit_dedicated_bonding_result( conn, packet[2]);
conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE;
break;
}
if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){
// link key sufficient for requested security
conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST;
break;
}
// not enough
hci_emit_security_level(handle, gap_security_level_for_connection(conn));
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;
2011-06-17 20:44:46 +00:00
}
}
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
int offset = 3;
for (i=0; i<packet[2];i++){
bt_flip_addr(addr, &packet[offset]);
offset += 14; // 6 + 1 + 1 + 1 + 3 + 2;
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);
2013-11-01 21:50:25 +00:00
hci_connection_t * conn = hci_connection_for_handle(handle);
if (conn) {
hci_shutdown_connection(conn);
}
2009-07-24 21:13:53 +00:00
}
break;
case HCI_EVENT_HARDWARE_ERROR:
if(hci_stack->control && hci_stack->control->hw_error){
(*hci_stack->control->hw_error)();
2014-06-26 15:20:09 +00:00
} else {
// if no special requests, just reboot stack
hci_power_control_off();
hci_power_control_on();
}
break;
case DAEMON_EVENT_HCI_PACKET_SENT:
// free packet buffer for asynchronous transport
if (hci_transport_synchronous()) break;
hci_stack->hci_packet_buffer_reserved = 0;
break;
#ifdef HAVE_BLE
case HCI_EVENT_LE_META:
switch (packet[2]){
case HCI_SUBEVENT_LE_ADVERTISING_REPORT:
log_info("advertising report received\n");
if (hci_stack->le_scanning_state != LE_SCANNING) break;
le_handle_advertisement_report(packet, size);
break;
case HCI_SUBEVENT_LE_CONNECTION_COMPLETE:
// Connection management
bt_flip_addr(addr, &packet[8]);
addr_type = (bd_addr_type_t)packet[7];
log_info("LE Connection_complete (status=%u) type %u, %s\n", packet[3], addr_type, bd_addr_to_str(addr));
// LE connections are auto-accepted, so just create a connection if there isn't one already
conn = hci_connection_for_bd_addr_and_type(&addr, addr_type);
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_bd_addr_and_type(addr, addr_type);
}
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;
2013-10-17 15:03:02 +00:00
// printf("LE buffer size: %u, count %u\n", READ_BT_16(packet,6), packet[8]);
default:
break;
}
break;
#endif
default:
break;
2009-07-24 21:13:53 +00:00
}
// handle BT initialization
if (hci_stack->state == HCI_STATE_INITIALIZING){
hci_initializing_event_handler(packet, size);
2009-05-17 20:51:48 +00:00
}
// 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);
2009-06-06 19:00:32 +00:00
// execute main loop
hci_run();
2009-05-17 20:32:14 +00:00
}
static 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;
2009-05-17 20:32:14 +00:00
}
static void hci_state_reset(){
// no connections yet
hci_stack->connections = NULL;
// keep discoverable/connectable as this has been requested by the client(s)
// hci_stack->discoverable = 0;
// hci_stack->connectable = 0;
// hci_stack->bondable = 1;
// buffer is free
hci_stack->hci_packet_buffer_reserved = 0;
// no pending cmds
hci_stack->decline_reason = 0;
hci_stack->new_scan_enable_value = 0xff;
// LE
hci_stack->adv_addr_type = 0;
memset(hci_stack->adv_address, 0, 6);
hci_stack->le_scanning_state = LE_SCAN_IDLE;
2014-06-07 07:54:27 +00:00
hci_stack->le_scan_type = 0xff;
}
void hci_init(hci_transport_t *transport, void *config, bt_control_t *control, remote_device_db_t const* remote_device_db){
2009-05-03 21:28:40 +00:00
#ifdef HAVE_MALLOC
if (!hci_stack) {
hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t));
}
#else
hci_stack = &hci_stack_static;
#endif
memset(hci_stack, 0, sizeof(hci_stack_t));
2009-05-03 21:28:40 +00:00
// reference to use transport layer implementation
hci_stack->hci_transport = transport;
2009-05-03 21:28:40 +00:00
2009-05-20 20:46:35 +00:00
// references to used control implementation
hci_stack->control = control;
2009-05-20 20:46:35 +00:00
// reference to used config
hci_stack->config = config;
2009-05-20 20:46:35 +00:00
2009-05-17 20:32:14 +00:00
// 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;
2009-05-17 20:32:14 +00:00
// register packet handlers with transport
transport->register_packet_handler(&packet_handler);
hci_stack->state = HCI_STATE_OFF;
// class of device
hci_stack->class_of_device = 0x007a020c; // Smartphone
// bondable by default
hci_stack->bondable = 1;
// Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept
hci_stack->ssp_enable = 1;
hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT;
hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING;
hci_stack->ssp_auto_accept = 1;
2014-01-02 21:38:03 +00:00
hci_state_reset();
2009-05-03 21:28:40 +00:00
}
void hci_close(){
// close remote device db
if (hci_stack->remote_device_db) {
hci_stack->remote_device_db->close();
}
while (hci_stack->connections) {
// cancel all l2cap connections
hci_emit_disconnection_complete(((hci_connection_t *) hci_stack->connections)->con_handle, 0x16); // terminated by local host
hci_shutdown_connection((hci_connection_t *) hci_stack->connections);
}
hci_power_control(HCI_POWER_OFF);
#ifdef HAVE_MALLOC
free(hci_stack);
#endif
hci_stack = NULL;
}
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void hci_set_class_of_device(uint32_t class_of_device){
hci_stack->class_of_device = class_of_device;
}
void hci_disable_l2cap_timeout_check(){
disable_l2cap_timeouts = 1;
}
// 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
2011-01-07 22:20:37 +00:00
// HCI_STATE_SLEEPING, off/sleep close
// HCI_STATE_FALLING_ASLEEP on open
2011-06-06 14:12:38 +00:00
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){
2011-07-22 18:34:18 +00:00
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){
2011-07-22 18:34:18 +00:00
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;
}
2011-06-06 14:12:38 +00:00
static void hci_power_control_off(void){
2011-07-22 18:31:02 +00:00
log_info("hci_power_control_off\n");
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// close low-level device
hci_stack->hci_transport->close(hci_stack->config);
2011-06-03 22:00:20 +00:00
2011-07-22 18:31:02 +00:00
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);
}
2011-06-03 22:00:20 +00:00
2011-07-22 18:31:02 +00:00
log_info("hci_power_control_off - control closed\n");
2011-06-03 22:00:20 +00:00
hci_stack->state = HCI_STATE_OFF;
2011-01-08 23:03:00 +00:00
}
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static void hci_power_control_sleep(void){
2011-07-22 18:31:02 +00:00
log_info("hci_power_control_sleep\n");
#if 0
// don't close serial port during sleep
2011-01-08 23:03:00 +00:00
// close low-level device
hci_stack->hci_transport->close(hci_stack->config);
#endif
2011-01-08 23:03:00 +00:00
// sleep mode
if (hci_stack->control && hci_stack->control->sleep){
(*hci_stack->control->sleep)(hci_stack->config);
2011-01-08 23:03:00 +00:00
}
hci_stack->state = HCI_STATE_SLEEPING;
}
2011-06-06 14:12:38 +00:00
static int hci_power_control_wake(void){
2011-07-22 18:31:02 +00:00
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){
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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;
}
static void hci_power_transition_to_initializing(void){
// set up state machine
hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent
hci_stack->hci_packet_buffer_reserved = 0;
hci_stack->state = HCI_STATE_INITIALIZING;
hci_stack->substate = 0;
}
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int hci_power_control(HCI_POWER_MODE power_mode){
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log_info("hci_power_control: %u, current mode %u\n", power_mode, hci_stack->state);
2011-01-07 22:20:37 +00:00
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) {
log_error("hci_power_control_on() error %u", err);
return err;
}
hci_power_transition_to_initializing();
break;
case HCI_POWER_OFF:
// do nothing
break;
case HCI_POWER_SLEEP:
// do nothing (with SLEEP == OFF)
break;
2010-08-05 20:23:06 +00:00
}
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
2011-01-08 23:03:00 +00:00
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:
hci_power_transition_to_initializing();
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 = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP;
break;
}
#endif
hci_power_transition_to_initializing();
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 = HCI_INTIALIZING_SUBSTATE_AFTER_SLEEP;
hci_update_scan_enable();
break;
}
#endif
2011-01-09 16:19:42 +00:00
err = hci_power_control_wake();
if (err) return err;
hci_power_transition_to_initializing();
break;
case HCI_POWER_OFF:
hci_stack->state = HCI_STATE_HALTING;
break;
case HCI_POWER_SLEEP:
// do nothing
break;
}
break;
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}
// create internal event
hci_emit_state();
// trigger next/first action
hci_run();
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return 0;
2009-04-29 22:00:24 +00:00
}
2009-05-03 21:28:40 +00:00
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();
}
2013-11-01 21:50:25 +00:00
bd_addr_t * hci_local_bd_addr(void){
return &hci_stack->local_bd_addr;
2013-11-01 21:50:25 +00:00
}
void hci_run(){
hci_connection_t * connection;
linked_item_t * it;
if (!hci_can_send_command_packet_now()) 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);
return;
}
// send scan enable
if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){
hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value);
hci_stack->new_scan_enable_value = 0xff;
return;
}
2014-05-06 21:21:34 +00:00
#ifdef HAVE_BLE
// handle le scan
if (hci_stack->state == HCI_STATE_WORKING){
switch(hci_stack->le_scanning_state){
case LE_START_SCAN:
hci_stack->le_scanning_state = LE_SCANNING;
hci_send_cmd(&hci_le_set_scan_enable, 1, 0);
return;
case LE_STOP_SCAN:
hci_stack->le_scanning_state = LE_SCAN_IDLE;
hci_send_cmd(&hci_le_set_scan_enable, 0, 0);
return;
default:
break;
}
2014-06-07 07:54:27 +00:00
if (hci_stack->le_scan_type != 0xff){
// defaults: active scanning, accept all advertisement packets
int scan_type = hci_stack->le_scan_type;
hci_stack->le_scan_type = 0xff;
hci_send_cmd(&hci_le_set_scan_parameters, scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->adv_addr_type, 0);
return;
}
}
2014-05-06 21:21:34 +00:00
#endif
// send pending HCI commands
for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){
connection = (hci_connection_t *) it;
switch(connection->state){
case SEND_CREATE_CONNECTION:
switch(connection->address_type){
case BD_ADDR_TYPE_CLASSIC:
log_info("sending hci_create_connection\n");
hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1);
break;
default:
2014-05-06 21:21:34 +00:00
#ifdef HAVE_BLE
log_info("sending hci_le_create_connection\n");
hci_send_cmd(&hci_le_create_connection,
0x0060, // scan interval: 60 ms
0x0030, // scan interval: 30 ms
0, // don't use whitelist
connection->address_type, // peer address type
connection->address, // peer bd addr
hci_stack->adv_addr_type, // our addr type:
0x0008, // conn interval min
0x0018, // conn interval max
0, // conn latency
0x0048, // supervision timeout
0x0001, // min ce length
0x0001 // max ce length
);
connection->state = SENT_CREATE_CONNECTION;
2014-05-06 21:21:34 +00:00
#endif
break;
}
return;
case RECEIVED_CONNECTION_REQUEST:
log_info("sending hci_accept_connection_request\n");
connection->state = ACCEPTED_CONNECTION_REQUEST;
hci_send_cmd(&hci_accept_connection_request, connection->address, 1);
return;
#ifdef HAVE_BLE
case SEND_CANCEL_CONNECTION:
connection->state = SENT_CANCEL_CONNECTION;
hci_send_cmd(&hci_le_create_connection_cancel);
return;
#endif
case SEND_DISCONNECT:
connection->state = SENT_DISCONNECT;
hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection
return;
default:
break;
}
if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){
log_info("responding to link key request\n");
connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST);
link_key_t link_key;
link_key_type_t link_key_type;
if ( hci_stack->remote_device_db
&& hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type)
&& gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){
connection->link_key_type = link_key_type;
hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key);
} else {
hci_send_cmd(&hci_link_key_request_negative_reply, connection->address);
}
return;
}
if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){
log_info("denying to pin request\n");
connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST);
hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address);
return;
}
if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){
connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY);
log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability);
if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){
// tweak authentication requirements
uint8_t authreq = hci_stack->ssp_authentication_requirement;
if (connection->bonding_flags & BONDING_DEDICATED){
authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING;
}
if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){
authreq |= 1;
}
hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq);
} else {
hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED);
}
return;
}
if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){
connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY);
hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address);
return;
}
if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){
connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY);
hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000);
return;
}
if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){
connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES;
hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle);
return;
}
if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){
connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK;
hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure
return;
}
if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){
connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE;
hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done
return;
}
if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){
connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST;
hci_send_cmd(&hci_authentication_requested, connection->con_handle);
return;
}
if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){
connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST;
hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1);
return;
}
}
switch (hci_stack->state){
case HCI_STATE_INITIALIZING:
hci_initializing_state_machine();
break;
case HCI_STATE_HALTING:
2011-07-22 18:31:02 +00:00
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_command_packet_now()) return;
2011-10-19 17:19:16 +00:00
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
2011-01-08 23:03:00 +00:00
// send disconnected event right away - causes higher layer connections to get closed, too.
hci_shutdown_connection(connection);
return;
}
2011-07-22 18:31:02 +00:00
log_info("HCI_STATE_HALTING, calling off\n");
2011-01-08 23:03:00 +00:00
// switch mode
hci_power_control_off();
2011-06-03 22:00:20 +00:00
2011-07-22 18:31:02 +00:00
log_info("HCI_STATE_HALTING, emitting state\n");
2011-01-08 23:03:00 +00:00
hci_emit_state();
2011-07-22 18:31:02 +00:00
log_info("HCI_STATE_HALTING, done\n");
2011-01-08 23:03:00 +00:00
break;
case HCI_STATE_FALLING_ASLEEP:
switch(hci_stack->substate) {
case 0:
2011-07-22 18:31:02 +00:00
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_command_packet_now()) return;
2011-10-19 17:19:16 +00:00
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;
}
if (hci_classic_supported()){
// disable page and inquiry scan
if (!hci_can_send_command_packet_now()) return;
log_info("HCI_STATE_HALTING, disabling inq scans\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;
}
// fall through for ble-only chips
case 2:
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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;
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}
break;
default:
break;
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}
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}
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]);
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log_info("Create_connection to %s\n", bd_addr_to_str(addr));
conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC);
if (!conn){
conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC);
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 = SEND_CREATE_CONNECTION;
}
log_info("conn state %u", conn->state);
switch (conn->state){
// if connection active exists
case OPEN:
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// and OPEN, emit connection complete command, don't send to controller
hci_emit_connection_complete(conn, 0);
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return 0;
case SEND_CREATE_CONNECTION:
// connection created by hci, e.g. dedicated bonding
break;
default:
// otherwise, just ignore as it is already in the open process
return 0;
}
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_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);
}
}
if (IS_COMMAND(packet, hci_pin_code_request_negative_reply)
|| IS_COMMAND(packet, hci_pin_code_request_reply)){
bt_flip_addr(addr, &packet[3]);
conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC);
if (conn){
connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE);
}
}
if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply)
|| IS_COMMAND(packet, hci_user_confirmation_request_reply)
|| IS_COMMAND(packet, hci_user_passkey_request_negative_reply)
|| IS_COMMAND(packet, hci_user_passkey_request_reply)) {
bt_flip_addr(addr, &packet[3]);
conn = hci_connection_for_bd_addr_and_type(&addr, BD_ADDR_TYPE_CLASSIC);
if (conn){
connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE);
}
}
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#ifdef HAVE_BLE
if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){
hci_stack->adv_addr_type = packet[8];
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}
if (IS_COMMAND(packet, hci_le_set_random_address)){
bt_flip_addr(hci_stack->adv_address, &packet[3]);
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}
#endif
hci_stack->num_cmd_packets--;
int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size);
// free packet buffer for synchronous transport implementations
if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){
hci_stack->hci_packet_buffer_reserved = 0;
}
return err;
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}
// disconnect because of security block
void hci_disconnect_security_block(hci_con_handle_t con_handle){
hci_connection_t * connection = hci_connection_for_handle(con_handle);
if (!connection) return;
connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK;
}
// Configure Secure Simple Pairing
// enable will enable SSP during init
void hci_ssp_set_enable(int enable){
hci_stack->ssp_enable = enable;
}
int hci_local_ssp_activated(){
return hci_ssp_supported() && hci_stack->ssp_enable;
}
// if set, BTstack will respond to io capability request using authentication requirement
void hci_ssp_set_io_capability(int io_capability){
hci_stack->ssp_io_capability = io_capability;
}
void hci_ssp_set_authentication_requirement(int authentication_requirement){
hci_stack->ssp_authentication_requirement = authentication_requirement;
}
// if set, BTstack will confirm a numberic comparion and enter '000000' if requested
void hci_ssp_set_auto_accept(int auto_accept){
hci_stack->ssp_auto_accept = auto_accept;
}
/**
* pre: numcmds >= 0 - it's allowed to send a command to the controller
*/
int hci_send_cmd(const hci_cmd_t *cmd, ...){
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if (!hci_can_send_command_packet_now()){
log_error("hci_send_cmd called but cannot send packet now");
return 0;
}
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// for HCI INITIALIZATION
// printf("hci_send_cmd: opcode %04x\n", cmd->opcode);
hci_stack->last_cmd_opcode = cmd->opcode;
hci_reserve_packet_buffer();
uint8_t * packet = hci_stack->hci_packet_buffer;
va_list argptr;
va_start(argptr, cmd);
uint16_t size = hci_create_cmd_internal(packet, cmd, argptr);
va_end(argptr);
return hci_send_cmd_packet(packet, size);
}
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// Create various non-HCI events.
// TODO: generalize, use table similar to hci_create_command
void hci_emit_state(){
log_info("BTSTACK_EVENT_STATE %u", hci_stack->state);
uint8_t event[3];
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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_le_connection_complete(hci_connection_t *conn, uint8_t status){
uint8_t event[21];
event[0] = HCI_EVENT_LE_META;
event[1] = sizeof(event) - 2;
event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE;
event[3] = status;
bt_store_16(event, 4, conn->con_handle);
event[6] = 0; // TODO: role
event[7] = conn->address_type;
bt_flip_addr(&event[8], conn->address);
bt_store_16(event, 14, 0); // interval
bt_store_16(event, 16, 0); // latency
bt_store_16(event, 18, 0); // supervision timeout
event[20] = 0; // master clock accuracy
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));
}
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void hci_emit_l2cap_check_timeout(hci_connection_t *conn){
if (disable_l2cap_timeouts) return;
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log_info("L2CAP_EVENT_TIMEOUT_CHECK");
uint8_t event[4];
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event[0] = L2CAP_EVENT_TIMEOUT_CHECK;
event[1] = sizeof(event) - 2;
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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));
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}
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void hci_emit_nr_connections_changed(){
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log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections());
uint8_t event[3];
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event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED;
event[1] = sizeof(event) - 2;
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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));
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}
void hci_emit_hci_open_failed(){
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log_info("BTSTACK_EVENT_POWERON_FAILED");
uint8_t event[2];
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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));
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}
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#ifndef EMBEDDED
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void hci_emit_btstack_version() {
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log_info("BTSTACK_EVENT_VERSION %u.%u", BTSTACK_MAJOR, BTSTACK_MINOR);
uint8_t event[6];
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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));
}
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#endif
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void hci_emit_system_bluetooth_enabled(uint8_t enabled){
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log_info("BTSTACK_EVENT_SYSTEM_BLUETOOTH_ENABLED %u", 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){
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uint8_t event[2+1+6+248+1]; // +1 for \0 in log_info
event[0] = BTSTACK_EVENT_REMOTE_NAME_CACHED;
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event[1] = sizeof(event) - 2 - 1;
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);
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event[9+248] = 0; // assert \0 for log_info
log_info("BTSTACK_EVENT_REMOTE_NAME_CACHED %s = '%s'", bd_addr_to_str(*addr), &event[9]);
hci_dump_packet(HCI_EVENT_PACKET, 0, event, sizeof(event)-1);
hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event)-1);
}
void hci_emit_discoverable_enabled(uint8_t enabled){
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log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", 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));
}
void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){
log_info("hci_emit_security_level %u for handle %x", level, con_handle);
uint8_t event[5];
int pos = 0;
event[pos++] = GAP_SECURITY_LEVEL;
event[pos++] = sizeof(event) - 2;
bt_store_16(event, 2, con_handle);
pos += 2;
event[pos++] = level;
hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event));
hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event));
}
void hci_emit_dedicated_bonding_result(hci_connection_t * connection, uint8_t status){
log_info("hci_emit_dedicated_bonding_result %u ", status);
uint8_t event[9];
int pos = 0;
event[pos++] = GAP_DEDICATED_BONDING_COMPLETED;
event[pos++] = sizeof(event) - 2;
event[pos++] = status;
bt_flip_addr( * (bd_addr_t *) &event[pos], connection->address);
pos += 6;
hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event));
hci_stack->packet_handler(HCI_EVENT_PACKET, event, sizeof(event));
}
// query if remote side supports SSP
int hci_remote_ssp_supported(hci_con_handle_t con_handle){
hci_connection_t * connection = hci_connection_for_handle(con_handle);
if (!connection) return 0;
return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0;
}
int hci_ssp_supported_on_both_sides(hci_con_handle_t handle){
return hci_local_ssp_activated() && hci_remote_ssp_supported(handle);
}
// GAP API
/**
* @bbrief enable/disable bonding. default is enabled
* @praram enabled
*/
void gap_set_bondable_mode(int enable){
hci_stack->bondable = enable ? 1 : 0;
}
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/**
* @brief map link keys to security levels
2014-01-16 15:53:36 +00:00
*/
gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){
switch (link_key_type){
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case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256:
return LEVEL_4;
case COMBINATION_KEY:
case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192:
return LEVEL_3;
default:
return LEVEL_2;
}
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}
static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){
if (!connection) return LEVEL_0;
if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0;
return gap_security_level_for_link_key_type(connection->link_key_type);
}
int gap_mitm_protection_required_for_security_level(gap_security_level_t level){
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log_info("gap_mitm_protection_required_for_security_level %u", level);
return level > LEVEL_2;
}
/**
* @brief get current security level
*/
gap_security_level_t gap_security_level(hci_con_handle_t con_handle){
hci_connection_t * connection = hci_connection_for_handle(con_handle);
if (!connection) return LEVEL_0;
return gap_security_level_for_connection(connection);
}
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/**
* @brief request connection to device to
* @result GAP_AUTHENTICATION_RESULT
*/
void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){
hci_connection_t * connection = hci_connection_for_handle(con_handle);
if (!connection){
hci_emit_security_level(con_handle, LEVEL_0);
return;
}
gap_security_level_t current_level = gap_security_level(con_handle);
log_info("gap_request_security_level %u, current level %u", requested_level, current_level);
if (current_level >= requested_level){
hci_emit_security_level(con_handle, current_level);
return;
}
connection->requested_security_level = requested_level;
// would enabling ecnryption suffice (>= LEVEL_2)?
if (hci_stack->remote_device_db){
link_key_type_t link_key_type;
link_key_t link_key;
if (hci_stack->remote_device_db->get_link_key( &connection->address, &link_key, &link_key_type)){
if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){
connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST;
return;
}
}
}
// try to authenticate connection
connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST;
hci_run();
}
/**
* @brief start dedicated bonding with device. disconnect after bonding
* @param device
* @param request MITM protection
* @result GAP_DEDICATED_BONDING_COMPLETE
*/
int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){
// create connection state machine
hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC);
if (!connection){
return BTSTACK_MEMORY_ALLOC_FAILED;
}
// delete linkn key
hci_drop_link_key_for_bd_addr( (bd_addr_t *) &device);
// configure LEVEL_2/3, dedicated bonding
connection->state = SEND_CREATE_CONNECTION;
connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2;
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log_info("gap_dedicated_bonding, mitm %u -> level %u", mitm_protection_required, connection->requested_security_level);
connection->bonding_flags = BONDING_DEDICATED;
// wait for GAP Security Result and send GAP Dedicated Bonding complete
// handle: connnection failure (connection complete != ok)
// handle: authentication failure
// handle: disconnect on done
hci_run();
return 0;
}
void gap_set_local_name(const char * local_name){
hci_stack->local_name = local_name;
}
le_command_status_t le_central_start_scan(){
if (hci_stack->le_scanning_state == LE_SCANNING) return BLE_PERIPHERAL_OK;
hci_stack->le_scanning_state = LE_START_SCAN;
hci_run();
return BLE_PERIPHERAL_OK;
}
le_command_status_t le_central_stop_scan(){
if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return BLE_PERIPHERAL_OK;
hci_stack->le_scanning_state = LE_STOP_SCAN;
hci_run();
return BLE_PERIPHERAL_OK;
}
2014-06-07 07:58:21 +00:00
void le_central_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){
hci_stack->le_scan_type = scan_type;
hci_stack->le_scan_interval = scan_interval;
hci_stack->le_scan_window = scan_window;
hci_run();
}
le_command_status_t le_central_connect(bd_addr_t * addr, bd_addr_type_t addr_type){
hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type);
if (!conn){
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log_info("le_central_connect: no connection exists yet, creating context");
conn = create_connection_for_bd_addr_and_type(*addr, addr_type);
if (!conn){
// notify client that alloc failed
hci_emit_le_connection_complete(conn, BTSTACK_MEMORY_ALLOC_FAILED);
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log_info("le_central_connect: failed to alloc context");
return BLE_PERIPHERAL_NOT_CONNECTED; // don't sent packet to controller
}
conn->state = SEND_CREATE_CONNECTION;
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log_info("le_central_connect: send create connection next");
hci_run();
return BLE_PERIPHERAL_OK;
}
if (!hci_is_le_connection(conn) ||
conn->state == SEND_CREATE_CONNECTION ||
conn->state == SENT_CREATE_CONNECTION) {
hci_emit_le_connection_complete(conn, ERROR_CODE_COMMAND_DISALLOWED);
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log_error("le_central_connect: classic connection or connect is already being created");
return BLE_PERIPHERAL_IN_WRONG_STATE;
}
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log_info("le_central_connect: context exists with state %u", conn->state);
hci_emit_le_connection_complete(conn, 0);
hci_run();
return BLE_PERIPHERAL_OK;
}
// @assumption: only a single outgoing LE Connection exists
static hci_connection_t * le_central_get_outgoing_connection(){
linked_item_t *it;
for (it = (linked_item_t *) hci_stack->connections; it ; it = it->next){
hci_connection_t * conn = (hci_connection_t *) it;
if (!hci_is_le_connection(conn)) continue;
switch (conn->state){
case SEND_CREATE_CONNECTION:
case SENT_CREATE_CONNECTION:
return conn;
default:
break;
};
}
return NULL;
}
le_command_status_t le_central_connect_cancel(){
hci_connection_t * conn = le_central_get_outgoing_connection();
switch (conn->state){
case SEND_CREATE_CONNECTION:
// skip sending create connection and emit event instead
hci_emit_le_connection_complete(conn, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER);
linked_list_remove(&hci_stack->connections, (linked_item_t *) conn);
btstack_memory_hci_connection_free( conn );
break;
case SENT_CREATE_CONNECTION:
// request to send cancel connection
conn->state = SEND_CANCEL_CONNECTION;
hci_run();
break;
default:
break;
}
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return BLE_PERIPHERAL_OK;
}
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le_command_status_t gap_disconnect(hci_con_handle_t handle){
hci_connection_t * conn = hci_connection_for_handle(handle);
if (!conn){
hci_emit_disconnection_complete(handle, 0);
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return BLE_PERIPHERAL_OK;
}
conn->state = SEND_DISCONNECT;
hci_run();
return BLE_PERIPHERAL_OK;
}
void hci_disconnect_all(){
linked_list_iterator_t it;
linked_list_iterator_init(&it, &hci_stack->connections);
while (linked_list_iterator_has_next(&it)){
hci_connection_t * con = (hci_connection_t*) linked_list_iterator_next(&it);
if (con->state == SENT_DISCONNECT) continue;
con->state = SEND_DISCONNECT;
}
hci_run();
}