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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 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.
*/
/**
* @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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