libdsm/bin/discover.c

//---------------------------------------------------------------------------
//  __________________    _________  _____            _____  .__         ._.
//  \______   \______ \  /   _____/ /     \          /  _  \ |__| ____   | |
//   |    |  _/|    |  \ \_____  \ /  \ /  \        /  /_\  \|  _/ __ \  | |
//   |    |   \|    `   \/        /    Y    \      /    |    |  \  ___/   \|
//   |______  /_______  /_______  \____|__  / /\   \____|__  |__|\___ |   __
//          \/        \/        \/        \/  )/           \/        \/   \/
//
// This file is part of libdsm. Copyright © 2014 VideoLabs SAS
//
// Author: Julien 'Lta' BALLET <contact@lta.io>
//
// This program is free software. It comes without any warranty, to the extent
// permitted by applicable law. You can redistribute it and/or modify it under
// the terms of the Do What The Fuck You Want To Public License, Version 2, as
// published by Sam Hocevar. See the COPYING file for more details.
//----------------------------------------------------------------------------

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>

#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#include "bdsm.h"

static void print_entry(const char *what, void *p_opaque,
                        netbios_ns_entry *entry)
{
  struct in_addr addr;

  addr.s_addr = netbios_ns_entry_ip(entry);

  printf("%s(%p): Ip: %s, name: %s/%s<%x>\n",
    what,
    p_opaque,
    inet_ntoa(addr),
    netbios_ns_entry_group(entry),
    netbios_ns_entry_name(entry),
    netbios_ns_entry_type(entry));
}

static void on_entry_added(void *p_opaque, netbios_ns_entry *entry)
{
  print_entry("added", p_opaque, entry);
}

static void on_entry_removed(void *p_opaque, netbios_ns_entry *entry)
{
  print_entry("removed", p_opaque, entry);
}

int main()
{
  netbios_ns *ns;
  netbios_ns_discover_callbacks callbacks;

  ns = netbios_ns_new();

  callbacks.p_opaque = (void*)0x42;
  callbacks.pf_on_entry_added = on_entry_added;
  callbacks.pf_on_entry_removed = on_entry_removed;

  printf("Discovering...\nPress Enter to quit\n");
  if (!netbios_ns_discover_start(ns,
                                 4, // broadcast every 4 seconds
                                 &callbacks))
  {
    fprintf(stderr, "Error while discovering local network\n");
    exit(42);
  }

  getchar();

  netbios_ns_discover_stop(ns);

  return (0);
}