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- /*
- This file is part of GNUnet.
- Copyright (C) 2011, 2012, 2014 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, 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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA.
- */
- /**
- * @file core/gnunet-core.c
- * @brief Print information about other peers known to CORE.
- * @author Nathan Evans
- */
- #include "platform.h"
- #include "gnunet_util_lib.h"
- #include "gnunet_core_service.h"
- /**
- * Option -m.
- */
- static int monitor_connections;
- /**
- * Handle to the CORE monitor.
- */
- static struct GNUNET_CORE_MonitorHandle *mh;
- /**
- * Task run in monitor mode when the user presses CTRL-C to abort.
- * Stops monitoring activity.
- *
- * @param cls NULL
- */
- static void
- shutdown_task (void *cls)
- {
- if (NULL != mh)
- {
- GNUNET_CORE_monitor_stop (mh);
- mh = NULL;
- }
- }
- /**
- * Function called to notify core users that another
- * peer changed its state with us.
- *
- * @param cls closure
- * @param peer the peer that changed state
- * @param state new state of the peer
- * @param timeout timeout for the new state
- */
- static void
- monitor_cb (void *cls,
- const struct GNUNET_PeerIdentity *peer,
- enum GNUNET_CORE_KxState state,
- struct GNUNET_TIME_Absolute timeout)
- {
- struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get();
- const char *now_str;
- const char *state_str;
- if ( ( (NULL == peer) ||
- (GNUNET_CORE_KX_ITERATION_FINISHED == state) ) &&
- (GNUNET_NO == monitor_connections) )
- {
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
- switch (state)
- {
- case GNUNET_CORE_KX_STATE_DOWN:
- /* should never happen, as we immediately send the key */
- state_str = _("fresh connection");
- break;
- case GNUNET_CORE_KX_STATE_KEY_SENT:
- state_str = _("key sent");
- break;
- case GNUNET_CORE_KX_STATE_KEY_RECEIVED:
- state_str = _("key received");
- break;
- case GNUNET_CORE_KX_STATE_UP:
- state_str = _("connection established");
- break;
- case GNUNET_CORE_KX_STATE_REKEY_SENT:
- state_str = _("rekeying");
- break;
- case GNUNET_CORE_KX_PEER_DISCONNECT:
- state_str = _("disconnected");
- break;
- case GNUNET_CORE_KX_ITERATION_FINISHED:
- return;
- case GNUNET_CORE_KX_CORE_DISCONNECT:
- FPRINTF (stderr,
- "%s\n",
- _("Connection to CORE service lost (reconnecting)"));
- return;
- default:
- state_str = _("unknown state");
- break;
- }
- now_str = GNUNET_STRINGS_absolute_time_to_string (now);
- FPRINTF (stdout,
- _("%24s: %-30s %4s (timeout in %6s)\n"),
- now_str,
- state_str,
- GNUNET_i2s (peer),
- GNUNET_STRINGS_relative_time_to_string (GNUNET_TIME_absolute_get_remaining (timeout),
- GNUNET_YES));
- }
- /**
- * Main function that will be run by the scheduler.
- *
- * @param cls closure
- * @param args remaining command-line arguments
- * @param cfgfile name of the configuration file used (for saving, can be NULL!)
- * @param cfg configuration
- */
- static void
- run (void *cls, char *const *args, const char *cfgfile,
- const struct GNUNET_CONFIGURATION_Handle *cfg)
- {
- if (NULL != args[0])
- {
- FPRINTF (stderr,
- _("Invalid command line argument `%s'\n"),
- args[0]);
- return;
- }
- mh = GNUNET_CORE_monitor_start (cfg,
- &monitor_cb,
- NULL);
- if (NULL == mh)
- {
- FPRINTF (stderr,
- "%s",
- _("Failed to connect to CORE service!\n"));
- return;
- }
- GNUNET_SCHEDULER_add_shutdown (&shutdown_task, NULL);
- }
- /**
- * The main function to obtain peer information from CORE.
- *
- * @param argc number of arguments from the command line
- * @param argv command line arguments
- * @return 0 ok, 1 on error
- */
- int
- main (int argc,
- char *const *argv)
- {
- int res;
- struct GNUNET_GETOPT_CommandLineOption options[] = {
- GNUNET_GETOPT_option_flag ('m',
- "monitor",
- gettext_noop ("provide information about all current connections (continuously)"),
- &monitor_connections),
- GNUNET_GETOPT_OPTION_END
- };
- if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
- return 2;
- res = GNUNET_PROGRAM_run (argc, argv, "gnunet-core",
- gettext_noop
- ("Print information about connected peers."),
- options, &run, NULL);
- GNUNET_free ((void *) argv);
- if (GNUNET_OK == res)
- return 0;
- return 1;
- }
- /* end of gnunet-core.c */
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