mirror of
https://github.com/bluekitchen/btstack.git
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265 lines
8.4 KiB
C
265 lines
8.4 KiB
C
/*
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* Copyright (C) 2014 BlueKitchen GmbH
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holders nor the names of
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* 4. Any redistribution, use, or modification is done solely for
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* personal benefit and not for any commercial purpose or for
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* monetary gain.
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*
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* THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
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* RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Please inquire about commercial licensing options at
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* contact@bluekitchen-gmbh.com
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*
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*/
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#define __BTSTACK_FILE__ "inquiry.c"
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/*
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* inquiry.c
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*
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* basic inquiry scan with remote name lookup
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*/
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "btstack_client.h"
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#ifdef _WIN32
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#include "btstack_run_loop_windows.h"
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#else
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#include "btstack_run_loop_posix.h"
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#endif
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#define MAX_DEVICES 10
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struct device {
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bd_addr_t address;
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uint16_t clockOffset;
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uint32_t classOfDevice;
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uint8_t pageScanRepetitionMode;
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uint8_t rssi;
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uint8_t state; // 0 empty, 1 found, 2 remote name tried, 3 remote name found
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};
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#define INQUIRY_INTERVAL 5
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struct device devices[MAX_DEVICES];
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int deviceCount = 0;
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enum STATE {INIT, W4_INQUIRY_MODE_COMPLETE, ACTIVE, DEVICE_NAME, REMOTE_NAME_REQUEST, REMOTE_NAME_INQUIRED, REMOTE_NAME_FETCHED} ;
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enum STATE state = INIT;
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int getDeviceIndexForAddress( bd_addr_t addr){
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int j;
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for (j=0; j< deviceCount; j++){
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if (bd_addr_cmp(addr, devices[j].address) == 0){
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return j;
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}
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}
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return -1;
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}
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void start_scan(void){
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printf("Starting inquiry scan..\n");
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bt_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, INQUIRY_INTERVAL, 0);
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}
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int has_more_remote_name_requests(void){
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int i;
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for (i=0;i<deviceCount;i++) {
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if (devices[i].state == REMOTE_NAME_REQUEST) return 1;
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}
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return 0;
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}
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void do_next_remote_name_request(void){
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int i;
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for (i=0;i<deviceCount;i++) {
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// remote name request
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if (devices[i].state == REMOTE_NAME_REQUEST){
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devices[i].state = REMOTE_NAME_INQUIRED;
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printf("Get remote name of %s...\n", bd_addr_to_str(devices[i].address));
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bt_send_cmd(&hci_remote_name_request, devices[i].address,
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devices[i].pageScanRepetitionMode, 0, devices[i].clockOffset | 0x8000);
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return;
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}
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}
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}
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static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
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//static void packet_handler (uint8_t packet_type, uint8_t *packet, uint16_t size){
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bd_addr_t addr;
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int i;
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int index;
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int numResponses;
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// printf("packet_handler: pt: 0x%02x, packet[0]: 0x%02x\n", packet_type, packet[0]);
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if (packet_type != HCI_EVENT_PACKET) return;
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uint8_t event = hci_event_packet_get_type(packet);
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switch(state){
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case INIT:
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if (btstack_event_state_get_state(packet) == HCI_STATE_WORKING){
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bt_send_cmd(&hci_write_inquiry_mode, 0x01); // with RSSI
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state = W4_INQUIRY_MODE_COMPLETE;
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}
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break;
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case W4_INQUIRY_MODE_COMPLETE:
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switch(event){
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case HCI_EVENT_COMMAND_COMPLETE:
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if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_inquiry_mode)) {
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start_scan();
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state = ACTIVE;
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}
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break;
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case HCI_EVENT_COMMAND_STATUS:
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if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_write_inquiry_mode)) {
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printf("Ignoring error (0x%x) from hci_write_inquiry_mode.\n", packet[2]);
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start_scan();
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state = ACTIVE;
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}
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break;
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default:
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break;
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}
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break;
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case ACTIVE:
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switch(event){
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case HCI_EVENT_INQUIRY_RESULT:
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case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI:{
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numResponses = hci_event_inquiry_result_get_num_responses(packet);
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int offset = 3;
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for (i=0; i<numResponses && deviceCount < MAX_DEVICES;i++){
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reverse_bd_addr(&packet[offset], addr);
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offset += 6;
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index = getDeviceIndexForAddress(addr);
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if (index >= 0) continue; // already in our list
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memcpy(devices[deviceCount].address, addr, 6);
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devices[deviceCount].pageScanRepetitionMode = packet[offset];
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offset += 1;
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if (event == HCI_EVENT_INQUIRY_RESULT){
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offset += 2; // Reserved + Reserved
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devices[deviceCount].classOfDevice = little_endian_read_24(packet, offset);
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offset += 3;
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devices[deviceCount].clockOffset = little_endian_read_16(packet, offset) & 0x7fff;
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offset += 2;
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devices[deviceCount].rssi = 0;
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} else {
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offset += 1; // Reserved
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devices[deviceCount].classOfDevice = little_endian_read_24(packet, offset);
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offset += 3;
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devices[deviceCount].clockOffset = little_endian_read_16(packet, offset) & 0x7fff;
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offset += 2;
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devices[deviceCount].rssi = packet[offset];
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offset += 1;
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}
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devices[deviceCount].state = REMOTE_NAME_REQUEST;
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printf("Device found: %s with COD: 0x%06x, pageScan %d, clock offset 0x%04x, rssi 0x%02x\n", bd_addr_to_str(addr),
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devices[deviceCount].classOfDevice, devices[deviceCount].pageScanRepetitionMode,
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devices[deviceCount].clockOffset, devices[deviceCount].rssi);
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deviceCount++;
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}
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break;
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}
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case HCI_EVENT_INQUIRY_COMPLETE:
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for (i=0;i<deviceCount;i++) {
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// retry remote name request
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if (devices[i].state == REMOTE_NAME_INQUIRED)
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devices[i].state = REMOTE_NAME_REQUEST;
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}
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if (has_more_remote_name_requests()){
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do_next_remote_name_request();
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break;
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}
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start_scan();
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break;
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case DAEMON_EVENT_REMOTE_NAME_CACHED:
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reverse_bd_addr(&packet[3], addr);
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printf("Cached remote name for %s: '%s'\n", bd_addr_to_str(addr), &packet[9]);
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break;
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case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE:
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reverse_bd_addr(&packet[3], addr);
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index = getDeviceIndexForAddress(addr);
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if (index >= 0) {
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if (packet[2] == 0) {
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printf("Name: '%s'\n", &packet[9]);
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devices[index].state = REMOTE_NAME_FETCHED;
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} else {
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printf("Failed to get name: page timeout\n");
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}
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}
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if (has_more_remote_name_requests()){
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do_next_remote_name_request();
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break;
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}
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start_scan();
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break;
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default:
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break;
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}
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break;
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default:
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break;
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}
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}
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int main (int argc, const char * argv[]){
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// start stack
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#ifdef _WIN32
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btstack_run_loop_init(btstack_run_loop_windows_get_instance());
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#else
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btstack_run_loop_init(btstack_run_loop_posix_get_instance());
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#endif
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int err = bt_open();
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if (err) {
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printf("Failed to open connection to BTdaemon\n");
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return err;
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}
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// init table
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int i; for (i=0;i<MAX_DEVICES;i++) devices[i].state = 0;
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bt_register_packet_handler(packet_handler);
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bt_send_cmd(&btstack_set_power_mode, HCI_POWER_ON );
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btstack_run_loop_execute();
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bt_close();
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return 0;
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}
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