linux Bluetooth programming in c

Question

I am trying to run a basic code of c in linux[ubuntu] to search bluetooth device, but i am facing some problem.

By using command sudo apt-get install bluez,

Answer 1

You need to install the linux-headers package. On Ubuntu or Debian this is done by doing this:

sudo apt install linux-headers

Answer 2

As for i know there no packages for these headers. You have to download the following header files from internet.

1. bluetooth.h
2. hci.h
3. hci_lib.h

and create a directory called "bluetooth" under /usr/lib/ in your host machine and copy the above headers to /usr/lib/bluetooth/. Then compile your program, it should work.

Note: while compiling link with -lbluetooth

Answer 3

This solved my problem:

apt-get install libbluetooth-dev 

Answer 4

Maybe you didn't include the essential header.

here's an example of code to scan for bluetooth devices

#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 *ii = NULL;
    int max_rsp, num_rsp;
    int dev_id, sock, len, flags;
    int i;
    char addr[19] = { 0 };
    char name[248] = { 0 };

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

    len  = 8;
    max_rsp = 255;
    flags = IREQ_CACHE_FLUSH;
    ii = (inquiry_info*)malloc(max_rsp * sizeof(inquiry_info));

    num_rsp = hci_inquiry(dev_id, len, max_rsp, NULL, &ii, flags);
    if( num_rsp < 0 ) perror("hci_inquiry");

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

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

to compile it on linux, just do

gcc -o simplescan simplescan.c -lbluetooth

EDIT:

Original code can be found in here