BufferedReader br = null;
    ArrayList<ClientScanResultSO> result = null;

   try {
        result = new ArrayList<ClientScanResultSO>();
        br = new BufferedReader(new FileReader("/proc/net/arp"));
        String line;
        while ((line = br.readLine()) != null) {
            String[] splitted = line.split(" +");

            if ((splitted != null) && (splitted.length >= 4)) {
                // Basic sanity check
                String mac = splitted[3];
                System.out.println("mac is***************"+ mac);
                if (mac.matches("..:..:..:..:..:..")) {
                    boolean isReachable = InetAddress.getByName(splitted[0]).isReachable(reachableTimeout);
                    String name = InetAddress.getByName(splitted[0]).getHostName();
                    if (!onlyReachables || isReachable) {
                        result.add(new ClientScanResultSO(splitted[0], splitted[3], splitted[5], isReachable, name));
                    }
                }
            }
        }
    } catch (Exception e) {
        Log.e(this.getClass().toString(), e.getMessage());
    } finally {
        try {
            br.close();
        } catch (IOException e) {
            Log.e(this.getClass().toString(), e.getMessage());
        }
    }

    return result;
}