gnunet-nse.c

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/*
      This file is part of GNUnet
      Copyright (C) 2008--2014, 2016 GNUnet e.V.
 
      GNUnet is free software: you can redistribute it and/or modify it
      under the terms of the GNU Affero General Public License as published
      by the Free Software Foundation, either version 3 of the License,
      or (at your option) any later version.
 
      GNUnet is distributed in the hope that it will be useful, but
      WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      Affero General Public License for more details.
 
      You should have received a copy of the GNU Affero General Public License
      along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
     SPDX-License-Identifier: AGPL3.0-or-later
 */
 
#include "platform.h"
#include "gnunet_nse_service.h"
#include <gnunet_util_lib.h>
 
static struct GNUNET_NSE_Handle *nse;
 
static int status;
 
static int monitor;
 
 
static void
do_shutdown (void *cls)
{
  (void) cls;
  if (NULL != nse)
  {
    GNUNET_NSE_disconnect (nse);
    nse = NULL;
  }
}
 
 
static void
handle_estimate (void *cls,
                 struct GNUNET_TIME_Absolute timestamp,
                 double estimate,
                 double std_dev)
{
  (void) cls;
  status = 0;
  fprintf (stdout,
           "%s: #peers=%f (ld(#peers)=%f, stddev=%f)\n",
           GNUNET_STRINGS_absolute_time_to_string (timestamp),
           GNUNET_NSE_log_estimate_to_n (estimate),
           estimate,
           std_dev);
  if (! monitor)
    GNUNET_SCHEDULER_shutdown ();
}
 
 
static void
run (void *cls,
     char *const *args,
     const char *cfgfile,
     const struct GNUNET_CONFIGURATION_Handle *cfg)
{
  (void) cls;
  (void) args;
  (void) cfgfile;
  nse = GNUNET_NSE_connect (cfg, &handle_estimate, NULL);
  GNUNET_SCHEDULER_add_shutdown (&do_shutdown, NULL);
}
 
 
int
main (int argc, char *const *argv)
{
  struct GNUNET_GETOPT_CommandLineOption options[] = {
    GNUNET_GETOPT_option_flag ('m',
                               "monitor",
                               gettext_noop (
                                 "Monitor and output current estimates"),
                               &monitor),
    GNUNET_GETOPT_OPTION_END
  };
 
  status = 1;
  if (GNUNET_OK !=
      GNUNET_PROGRAM_run (GNUNET_OS_project_data_gnunet (),
                          argc,
                          argv,
                          "gnunet-nse",
                          gettext_noop (
                            "Show network size estimates from NSE service."),
                          options,
                          &run,
                          NULL))
    return 2;
  return status;
}