#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/socket.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/hci.h>
#include <bluetooth/hci_lib.h>

int main(int argc, char **argv)
{
    inquiry_info *devices = NULL;
    int max_rsp, num_rsp;
    int adapter_id, sock, len, flags;
    int i;
    char addr[19] = { 0 };
    char name[248] = { 0 };

    adapter_id = hci_get_route(NULL);
    sock = hci_open_dev( adapter_id );
    if (adapter_id < 0 || sock < 0) {
        perror("opening socket");
        exit(1);
    }

    len  = 8;
    max_rsp = 255;
    flags = IREQ_CACHE_FLUSH;
    devices = (inquiry_info*)malloc(max_rsp * sizeof(inquiry_info));
    
    num_rsp = hci_inquiry(adapter_id, len, max_rsp, NULL, &devices, 
            flags);
    if( num_rsp < 0 ) perror("hci_inquiry");

    for (i = 0; i < num_rsp; i++) {
        ba2str(&(devices+i)->bdaddr, addr);
        memset(name, 0, sizeof(name));
        if (0 != hci_read_remote_name(sock, &(devices+i)->bdaddr, 
                    sizeof(name), name, 0)) {
            strcpy(name, "[unknown]");
        }
        printf("%s  %s\n", addr, name);
    }

    free( devices );
    close( sock );
    return 0;
}