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/*
This file is part of GNUnet.
Copyright (C) 2013 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 dv/gnunet-dv.c
* @brief DV monitoring command line tool
* @author Christian Grothoff
*/
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_dv_service.h"
/**
* Handle to DV service.
*/
static struct GNUNET_DV_ServiceHandle *sh;
/**
* Was verbose specified?
*/
static unsigned int verbose;
/**
* Function called if DV starts to be able to talk to a peer.
*
* @param cls closure
* @param peer newly connected peer
* @param distance distance to the peer
* @param network the network the next hop is located in
*/
static void
connect_cb (void *cls,
const struct GNUNET_PeerIdentity *peer,
uint32_t distance,
enum GNUNET_ATS_Network_Type network)
{
fprintf (stderr, "Connect: %s at %u\n",
GNUNET_i2s (peer),
(unsigned int) distance);
}
/**
* Function called if DV distance to a peer is changed.
*
* @param cls closure
* @param peer connected peer
* @param distance new distance to the peer
* @param network network used on first hop to peer
*/
static void
change_cb (void *cls,
const struct GNUNET_PeerIdentity *peer,
uint32_t distance,
enum GNUNET_ATS_Network_Type network)
{
fprintf (stderr, "Change: %s at %u\n",
GNUNET_i2s (peer),
(unsigned int) distance);
}
/**
* Function called if DV is no longer able to talk to a peer.
*
* @param cls closure
* @param peer peer that disconnected
*/
static void
disconnect_cb (void *cls,
const struct GNUNET_PeerIdentity *peer)
{
fprintf (stderr, "Disconnect: %s\n",
GNUNET_i2s (peer));
}
/**
* Function called if DV receives a message for this peer.
*
* @param cls closure
* @param sender sender of the message
* @param distance how far did the message travel
* @param msg actual message payload
*/
static void
message_cb (void *cls,
const struct GNUNET_PeerIdentity *sender,
uint32_t distance,
const struct GNUNET_MessageHeader *msg)
{
if (verbose)
fprintf (stderr, "Message: %s at %u sends %u bytes of type %u\n",
GNUNET_i2s (sender),
(unsigned int) distance,
(unsigned int) ntohs (msg->size),
(unsigned int) ntohs (msg->type));
}
/**
* Task run on shutdown.
*
* @param cls NULL
*/
static void
shutdown_task (void *cls)
{
GNUNET_DV_service_disconnect (sh);
sh = 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)
{
sh = GNUNET_DV_service_connect (cfg, NULL,
&connect_cb,
&change_cb,
&disconnect_cb,
&message_cb);
GNUNET_SCHEDULER_add_shutdown (&shutdown_task, NULL);
}
/**
* The main function.
*
* @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_verbose (&verbose),
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-dv",
gettext_noop ("Print information about DV state"),
options, &run,
NULL);
GNUNET_free ((void *) argv);
if (GNUNET_OK != res)
return 1;
return 0;
}
/* end of gnunet-dv.c */
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