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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
- */
- /**
- * @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)
- {
- (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)
- {
- (void) cls;
- 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)
- {
- (void) cls;
- (void) args;
- (void) cfgfile;
- 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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