/*
* Copyright (C) 2014 BlueKitchen GmbH
*
* 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 BLUEKITCHEN GMBH 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
* contact@bluekitchen-gmbh.com
*
*/
#define BTSTACK_FILE__ "inquiry.c"
/*
* inquiry.c
*
* basic inquiry scan with remote name lookup
*/
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "btstack_client.h"
#ifdef _WIN32
#include "btstack_run_loop_windows.h"
#else
#include "btstack_run_loop_posix.h"
#endif
#define MAX_DEVICES 10
struct device {
bd_addr_t address;
uint16_t clockOffset;
uint32_t classOfDevice;
uint8_t pageScanRepetitionMode;
uint8_t rssi;
uint8_t state; // 0 empty, 1 found, 2 remote name tried, 3 remote name found
};
#define INQUIRY_INTERVAL 5
struct device devices[MAX_DEVICES];
int deviceCount = 0;
enum STATE {INIT, W4_INQUIRY_MODE_COMPLETE, ACTIVE, DEVICE_NAME, REMOTE_NAME_REQUEST, REMOTE_NAME_INQUIRED, REMOTE_NAME_FETCHED} ;
enum STATE state = INIT;
int getDeviceIndexForAddress( bd_addr_t addr){
int j;
for (j=0; j< deviceCount; j++){
if (bd_addr_cmp(addr, devices[j].address) == 0){
return j;
}
}
return -1;
}
void start_scan(void){
printf("Starting inquiry scan..\n");
bt_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, INQUIRY_INTERVAL, 0);
}
int has_more_remote_name_requests(void){
int i;
for (i=0;i<deviceCount;i++) {
if (devices[i].state == REMOTE_NAME_REQUEST) return 1;
}
return 0;
}
void do_next_remote_name_request(void){
int i;
for (i=0;i<deviceCount;i++) {
// remote name request
if (devices[i].state == REMOTE_NAME_REQUEST){
devices[i].state = REMOTE_NAME_INQUIRED;
printf("Get remote name of %s...\n", bd_addr_to_str(devices[i].address));
bt_send_cmd(&hci_remote_name_request, devices[i].address,
devices[i].pageScanRepetitionMode, 0, devices[i].clockOffset | 0x8000);
return;
}
}
}
static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
//static void packet_handler (uint8_t packet_type, uint8_t *packet, uint16_t size){
bd_addr_t addr;
int i;
int index;
int numResponses;
// printf("packet_handler: pt: 0x%02x, packet[0]: 0x%02x\n", packet_type, packet[0]);
if (packet_type != HCI_EVENT_PACKET) return;
uint8_t event = hci_event_packet_get_type(packet);
switch(state){
case INIT:
if (btstack_event_state_get_state(packet) == HCI_STATE_WORKING){
bt_send_cmd(&hci_write_inquiry_mode, 0x01); // with RSSI
state = W4_INQUIRY_MODE_COMPLETE;
}
break;
case W4_INQUIRY_MODE_COMPLETE:
switch(event){
case HCI_EVENT_COMMAND_COMPLETE:
if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_inquiry_mode)) {
start_scan();
state = ACTIVE;
}
break;
case HCI_EVENT_COMMAND_STATUS:
if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_write_inquiry_mode)) {
printf("Ignoring error (0x%x) from hci_write_inquiry_mode.\n", packet[2]);
start_scan();
state = ACTIVE;
}
break;
default:
break;
}
break;
case ACTIVE:
switch(event){
case HCI_EVENT_INQUIRY_RESULT:
case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI:{
numResponses = hci_event_inquiry_result_get_num_responses(packet);
int offset = 3;
for (i=0; i<numResponses && deviceCount < MAX_DEVICES;i++){
reverse_bd_addr(&packet[offset], addr);
offset += 6;
index = getDeviceIndexForAddress(addr);
if (index >= 0) continue; // already in our list
memcpy(devices[deviceCount].address, addr, 6);
devices[deviceCount].pageScanRepetitionMode = packet[offset];
offset += 1;
if (event == HCI_EVENT_INQUIRY_RESULT){
offset += 2; // Reserved + Reserved
devices[deviceCount].classOfDevice = little_endian_read_24(packet, offset);
offset += 3;
devices[deviceCount].clockOffset = little_endian_read_16(packet, offset) & 0x7fff;
offset += 2;
devices[deviceCount].rssi = 0;
} else {
offset += 1; // Reserved
devices[deviceCount].classOfDevice = little_endian_read_24(packet, offset);
offset += 3;
devices[deviceCount].clockOffset = little_endian_read_16(packet, offset) & 0x7fff;
offset += 2;
devices[deviceCount].rssi = packet[offset];
offset += 1;
}
devices[deviceCount].state = REMOTE_NAME_REQUEST;
printf("Device found: %s with COD: 0x%06x, pageScan %d, clock offset 0x%04x, rssi 0x%02x\n", bd_addr_to_str(addr),
devices[deviceCount].classOfDevice, devices[deviceCount].pageScanRepetitionMode,
devices[deviceCount].clockOffset, devices[deviceCount].rssi);
deviceCount++;
}
break;
}
case HCI_EVENT_INQUIRY_COMPLETE:
for (i=0;i<deviceCount;i++) {
// retry remote name request
if (devices[i].state == REMOTE_NAME_INQUIRED)
devices[i].state = REMOTE_NAME_REQUEST;
}
if (has_more_remote_name_requests()){
do_next_remote_name_request();
break;
}
start_scan();
break;
case DAEMON_EVENT_REMOTE_NAME_CACHED:
reverse_bd_addr(&packet[3], addr);
printf("Cached remote name for %s: '%s'\n", bd_addr_to_str(addr), &packet[9]);
break;
case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE:
reverse_bd_addr(&packet[3], addr);
index = getDeviceIndexForAddress(addr);
if (index >= 0) {
if (packet[2] == 0) {
printf("Name: '%s'\n", &packet[9]);
devices[index].state = REMOTE_NAME_FETCHED;
} else {
printf("Failed to get name: page timeout\n");
}
}
if (has_more_remote_name_requests()){
do_next_remote_name_request();
break;
}
start_scan();
break;
default:
break;
}
break;
default:
break;
}
}
int main (int argc, const char * argv[]){
// start stack
#ifdef _WIN32
btstack_run_loop_init(btstack_run_loop_windows_get_instance());
#else
btstack_run_loop_init(btstack_run_loop_posix_get_instance());
#endif
int err = bt_open();
if (err) {
printf("Failed to open connection to BTdaemon\n");
return err;
}
// init table
int i; for (i=0;i<MAX_DEVICES;i++) devices[i].state = 0;
bt_register_packet_handler(packet_handler);
bt_send_cmd(&btstack_set_power_mode, HCI_POWER_ON );
btstack_run_loop_execute();
bt_close();
return 0;
}