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/*
This file is part of GNUnet
(C) 2008--2014 Christian Grothoff (and other contributing authors)
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, 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/**
* @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"
/**
* Handle to our configuration
*/
static struct GNUNET_CONFIGURATION_Handle *cfg;
/**
* The handle to the NSE service
*/
static struct GNUNET_NSE_Handle *nse;
/**
* The handle to test if NSE service is running or not
*/
static struct GNUNET_CLIENT_TestHandle *test;
/**
* Shutdown task
*/
static GNUNET_SCHEDULER_TaskIdentifier shutdown_task;
/**
* The program status; 0 for success.
*/
static int status;
/**
* Task to shutdown and clean up all state
*
* @param cls NULL
* @param tc the scheduler task context
*/
static void
do_shutdown (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
shutdown_task = GNUNET_SCHEDULER_NO_TASK;
if (NULL != test)
GNUNET_CLIENT_service_test_cancel (test);
if (NULL != nse)
GNUNET_NSE_disconnect (nse);
if (NULL != cfg)
GNUNET_CONFIGURATION_destroy (cfg);
}
/**
* 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)
{
FPRINTF (stdout, "%llu %f %f %f\n",
(unsigned long long) timestamp.abs_value_us,
GNUNET_NSE_log_estimate_to_n (estimate),
estimate,
std_dev);
}
/**
* Function called with the result on the service test for the NSE service
*
* @param cls NULL
* @param result #GNUNET_YES if the service is running,
* #GNUNET_NO if the service is not running
* #GNUNET_SYSERR if the configuration is invalid
*/
static void
nse_test_result (void *cls, int result)
{
test = NULL;
switch (result)
{
case GNUNET_YES:
nse = GNUNET_NSE_connect (cfg, &handle_estimate, NULL);
status = 0;
break;
case GNUNET_NO:
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("NSE service is not running\n"));
GNUNET_SCHEDULER_shutdown ();
return;
default:
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("Error while checking if NSE service is running or not\n"));
GNUNET_SCHEDULER_shutdown ();
return;
}
}
/**
* 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)
{
cfg = GNUNET_CONFIGURATION_dup (_cfg);
test = GNUNET_CLIENT_service_test ("nse",
cfg,
GNUNET_TIME_UNIT_SECONDS,
nse_test_result,
NULL);
shutdown_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
&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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