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/*
This file is part of GNUnet.
(C) 2012 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 mesh/gnunet-mesh.c
* @brief Print information about mesh tunnels and peers.
* @author Bartlomiej Polot
*/
#include "platform.h"
#include "gnunet_configuration_lib.h"
#include "gnunet_getopt_lib.h"
#include "gnunet_mesh_service.h"
#include "gnunet_program_lib.h"
/**
* Option -m.
*/
static int monitor_connections;
/**
* Option -t
*/
static char *tunnel_id;
/**
* Mesh handle.
*/
static struct GNUNET_MESH_Handle *mh;
/**
* Shutdown task handle.
*/
GNUNET_SCHEDULER_TaskIdentifier sd;
/**
* Task run in monitor mode when the user presses CTRL-C to abort.
* Stops monitoring activity.
*
* @param cls Closure (unused).
* @param tc scheduler context
*/
static void
shutdown_task (void *cls,
const struct GNUNET_SCHEDULER_TaskContext *tc)
{
if (NULL != mh)
{
GNUNET_MESH_disconnect (mh);
mh = NULL;
}
}
/**
* Method called to retrieve information about each tunnel the mesh peer
* is aware of.
*
* @param cls Closure (unused).
* @param initiator Peer that started the tunnel (owner).
* @param tunnel_number Tunnel number.
* @param peers Array of peer identities that participate in the tunnel.
* @param npeers Number of peers in peers.
*/
static void
tunnels_callback (void *cls,
const struct GNUNET_PeerIdentity *initiator,
unsigned int tunnel_number,
const struct GNUNET_PeerIdentity *peers,
unsigned int npeers)
{
unsigned int i;
fprintf (stdout, "Tunnel %s [%u]: %u peers\n",
GNUNET_i2s_full (initiator), tunnel_number, npeers);
for (i = 0; i < npeers; i++)
fprintf (stdout, " * %s\n", GNUNET_i2s_full (&peers[i]));
fprintf (stdout, "\n");
}
/**
* Method called to retrieve information about each tunnel the mesh peer
* is aware of.
*
* @param cls Closure.
* @param peer Peer in the tunnel's tree.
* @param parent Parent of the current peer. All 0 when peer is root.
*
*/
static void
tunnel_callback (void *cls,
const struct GNUNET_PeerIdentity *peer,
const struct GNUNET_PeerIdentity *parent)
{
}
/**
* Call MESH's monitor API, get all tunnels known to peer.
*
* @param cls Closure (unused).
* @param tc TaskContext
*/
static void
get_tunnels (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
{
return;
}
GNUNET_MESH_get_tunnels (mh, &tunnels_callback, NULL);
if (GNUNET_YES != monitor_connections)
{
GNUNET_SCHEDULER_shutdown();
}
}
/**
* Call MESH's monitor API, get info of one tunnel.
*
* @param cls Closure (unused).
* @param tc TaskContext
*/
static void
show_tunnel (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct GNUNET_PeerIdentity pid;
if (GNUNET_OK !=
GNUNET_CRYPTO_hash_from_string (tunnel_id, &pid.hashPubKey))
{
GNUNET_SCHEDULER_shutdown();
return;
}
GNUNET_MESH_show_tunnel (mh, &pid, 0, tunnel_callback, NULL);
}
/**
* 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)
{
static const struct GNUNET_MESH_MessageHandler handlers[] = {
{NULL, 0, 0} /* FIXME add option to monitor msg types */
};
GNUNET_MESH_ApplicationType apps = 0; /* FIXME add option to monitor apps */
if (args[0] != NULL)
{
FPRINTF (stderr, _("Invalid command line argument `%s'\n"), args[0]);
return;
}
mh = GNUNET_MESH_connect (cfg,
NULL, /* cls */
NULL, /* nt */
NULL, /* cleaner */
handlers,
&apps);
if (NULL == mh)
GNUNET_SCHEDULER_add_now (shutdown_task, NULL);
else
sd = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
shutdown_task, NULL);
if (NULL != tunnel_id)
GNUNET_SCHEDULER_add_now (&show_tunnel, NULL);
else
GNUNET_SCHEDULER_add_now (&get_tunnels, NULL);
}
/**
* The main function to obtain peer information.
*
* @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;
static const struct GNUNET_GETOPT_CommandLineOption options[] = {
{'m', "monitor", NULL,
gettext_noop ("provide information about all tunnels (continuously) NOT IMPLEMENTED"), /* FIXME */
GNUNET_NO, &GNUNET_GETOPT_set_one, &monitor_connections},
{'t', "tunnel", "OWNER_ID:TUNNEL_ID",
gettext_noop ("provide information about a particular tunnel"),
GNUNET_YES, &GNUNET_GETOPT_set_string, &tunnel_id},
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-mesh",
gettext_noop
("Print information about mesh tunnels and peers."),
options, &run, NULL);
GNUNET_free ((void *) argv);
if (GNUNET_OK == res)
return 0;
else
return 1;
}
/* end of gnunet-mesh.c */
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