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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 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.
*/
/**
* @file nse/gnunet-nse.c
* @brief Program to display network size estimates from the NSE service
* @author Sree Harsha Totakura <sreeharsha@totakura.in>
*/
#include "platform.h"
#include "gnunet_nse_service.h"
/**
* The handle to the NSE service
*/
static struct GNUNET_NSE_Handle *nse;
/**
* The program status; 0 for success.
*/
static int status;
/**
* Task to shutdown and clean up all state
*
* @param cls NULL
*/
static void
do_shutdown (void *cls)
{
if (NULL != nse)
{
GNUNET_NSE_disconnect (nse);
nse = NULL;
}
}
/**
* Callback to call when network size estimate is updated.
*
* @param cls NULL
* @param timestamp server timestamp
* @param estimate the value of the current network size estimate
* @param std_dev standard deviation (rounded down to nearest integer)
* of the size estimation values seen
*/
static void
handle_estimate (void *cls,
struct GNUNET_TIME_Absolute timestamp,
double estimate,
double std_dev)
{
status = 0;
FPRINTF (stdout, "%llu %f %f %f\n",
(unsigned long long) timestamp.abs_value_us,
GNUNET_NSE_log_estimate_to_n (estimate),
estimate,
std_dev);
}
/**
* Actual main function that runs the emulation.
*
* @param cls unused
* @param args remaining args, unused
* @param cfgfile name of the configuration
* @param cfg configuration handle
*/
static void
run (void *cls,
char *const *args,
const char *cfgfile,
const struct GNUNET_CONFIGURATION_Handle *cfg)
{
nse = GNUNET_NSE_connect (cfg,
&handle_estimate,
NULL);
GNUNET_SCHEDULER_add_shutdown (&do_shutdown,
NULL);
}
/**
* Main function.
*
* @return 0 on success
*/
int
main (int argc,
char *const *argv)
{
static struct GNUNET_GETOPT_CommandLineOption options[] = {
GNUNET_GETOPT_OPTION_END
};
status = 1;
if (GNUNET_OK !=
GNUNET_PROGRAM_run (argc,
argv,
"gnunet-nse",
gettext_noop
("Show network size estimates from NSE service."),
options,
&run, NULL))
return 2;
return status;
}
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