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/*
This file is part of GNUnet.
(C) 2007, 2008, 2009 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 2, 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 hostlist/gnunet-daemon-hostlist.c
* @brief code for bootstrapping via hostlist servers
* @author Christian Grothoff
*
* TODO:
* - implement -a and -e switches (send P2P messages about our hostlist URL,
* receive such messages and automatically update our hostlist URL config
* value).
*/
#include <stdlib.h>
#include "platform.h"
#include "hostlist-client.h"
#include "hostlist-server.h"
#include "gnunet_core_service.h"
#include "gnunet_getopt_lib.h"
#include "gnunet_protocols.h"
#include "gnunet_program_lib.h"
#include "gnunet_statistics_service.h"
#include "gnunet_strings_lib.h"
#include "gnunet_time_lib.h"
#include "gnunet_util_lib.h"
/**
* Set if we are allowed to advertise our hostlist to others.
*/
static int advertising;
/**
* Set if we are allowed to learn about peers by accessing
* hostlist servers.
*/
static int bootstrapping;
/**
* Set if the user allows us to learn about new hostlists
* from the network.
*/
static int learning;
/**
* Set if the user wants us to run a hostlist server.
*/
static int provide_hostlist;
/**
* Statistics handle.
*/
static struct GNUNET_STATISTICS_Handle *stats;
/**
* Handle to the core service (NULL until we've connected to it).
*/
struct GNUNET_CORE_Handle *core;
/**
* gnunet-daemon-hostlist command line options.
*/
static struct GNUNET_GETOPT_CommandLineOption options[] = {
{ 'a', "advertise", NULL,
gettext_noop ("advertise our hostlist to other peers"),
GNUNET_NO, &GNUNET_GETOPT_set_one, &advertising },
{ 'b', "bootstrap", NULL,
gettext_noop ("bootstrap using hostlists (it is highly recommended that you always use this option)"),
GNUNET_NO, &GNUNET_GETOPT_set_one, &bootstrapping },
{ 'e', "enable-learning", NULL,
gettext_noop ("enable learning about hostlist servers from other peers"),
GNUNET_NO, &GNUNET_GETOPT_set_one, &learning},
{ 'p', "provide-hostlist", NULL,
gettext_noop ("provide a hostlist server"),
GNUNET_NO, &GNUNET_GETOPT_set_one, &provide_hostlist},
GNUNET_GETOPT_OPTION_END
};
static void
core_init (void *cls,
struct GNUNET_CORE_Handle * server,
const struct GNUNET_PeerIdentity *
my_identity,
const struct
GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *
publicKey)
{
if (advertising && (NULL != server))
{
/* FIXME: provide "server" to 'hostlist' module */
}
}
/**
* Last task run during shutdown. Disconnects us from
* the other services.
*/
static void
cleaning_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Hostlist daemon is shutting down.\n");
if (bootstrapping)
{
GNUNET_HOSTLIST_client_stop ();
}
if (provide_hostlist)
{
GNUNET_HOSTLIST_server_stop ();
}
if (core != NULL)
{
GNUNET_CORE_disconnect (core);
core = NULL;
}
if (stats != NULL)
{
GNUNET_STATISTICS_destroy (stats,
GNUNET_NO);
stats = NULL;
}
}
/**
* Main function that will be run.
*
* @param cls closure
* @param sched the scheduler to use
* @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,
struct GNUNET_SCHEDULER_Handle * sched,
char *const *args,
const char *cfgfile,
const struct GNUNET_CONFIGURATION_Handle * cfg)
{
GNUNET_CORE_ConnectEventHandler ch = NULL;
GNUNET_CORE_DisconnectEventHandler dh = NULL;
struct GNUNET_CORE_MessageHandler handlers[] =
{
{ NULL, 0, 0 }
};
if ( (! bootstrapping) &&
(! learning) &&
(! provide_hostlist) )
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_("None of the functions for the hostlist daemon were enabled. I have no reason to run!\n"));
return;
}
stats = GNUNET_STATISTICS_create (sched, "hostlist", cfg);
if (bootstrapping)
{
GNUNET_HOSTLIST_client_start (cfg, sched, stats,
&ch, &dh);
}
if (provide_hostlist)
{
GNUNET_HOSTLIST_server_start (cfg, sched, stats);
}
if (learning)
{
/* FIXME (register handler with core for hostlist ads) */
}
core = GNUNET_CORE_connect (sched, cfg,
GNUNET_TIME_UNIT_FOREVER_REL,
NULL,
&core_init,
NULL, ch, dh,
NULL, GNUNET_NO,
NULL, GNUNET_NO,
handlers);
GNUNET_SCHEDULER_add_delayed (sched,
GNUNET_TIME_UNIT_FOREVER_REL,
&cleaning_task, NULL);
if (NULL == core)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("Failed to connect to `%s' service.\n"),
"core");
GNUNET_SCHEDULER_shutdown (sched);
return;
}
}
/**
* The main function for the hostlist daemon.
*
* @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 ret;
ret = (GNUNET_OK ==
GNUNET_PROGRAM_run (argc,
argv,
"hostlist",
_("GNUnet hostlist server and client"),
options,
&run, NULL)) ? 0 : 1;
return ret;
}
/* end of gnunet-daemon-hostlist.c */
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