/*
This file is part of GNUnet.
- (C) 2007, 2008, 2009 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2007, 2008, 2009, 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 2, or (at your
+ 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
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.
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, 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-daemon-hostlist_client.h"
#include "gnunet_core_service.h"
-#include "gnunet_getopt_lib.h"
+#include "gnunet_util_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"
+#if HAVE_MHD
+
+#include "gnunet-daemon-hostlist_server.h"
/**
* Set if we are allowed to advertise our hostlist to others.
*/
static int advertising;
+/**
+ * Set if the user wants us to run a hostlist server.
+ */
+static int provide_hostlist;
+
+/**
+ * Handle to hostlist server's connect handler
+ */
+static GNUNET_CORE_ConnecTEventHandler server_ch;
+
+#endif
+
/**
* Set if we are allowed to learn about peers by accessing
* hostlist servers.
*/
static int learning;
-/**
- * Set if the user wants us to run a hostlist server.
- */
-static int provide_hostlist;
-
/**
* Statistics handle.
*/
/**
* 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 struct GNUNET_CORE_Handle *core;
+
+/**
+ * Handle to the hostlist client's advertisement handler
+ */
+static GNUNET_HOSTLIST_UriHandler client_adv_handler;
+
+/**
+ * Handle to hostlist client's connect handler
+ */
+static GNUNET_CORE_ConnecTEventHandler client_ch;
+
+/**
+ * Handle to hostlist client's disconnect handler
+ */
+static GNUNET_CORE_DisconnecTEventHandler client_dh;
+
+GNUNET_NETWORK_STRUCT_BEGIN
+
+/**
+ * A HOSTLIST_ADV message is used to exchange information about
+ * hostlist advertisements. This struct is always
+ * followed by the actual url under which the hostlist can be obtained:
+ *
+ * 1) transport-name (0-terminated)
+ * 2) address-length (uint32_t, network byte order; possibly
+ * unaligned!)
+ * 3) address expiration (GNUNET_TIME_AbsoluteNBO); possibly
+ * unaligned!)
+ * 4) address (address-length bytes; possibly unaligned!)
+ */
+struct GNUNET_HOSTLIST_ADV_Message
+{
+ /**
+ * Type will be GNUNET_MESSAGE_TYPE_HOSTLIST_ADVERTISEMENT.
+ */
+ struct GNUNET_MessageHeader header;
+
+ /**
+ * Always zero (for alignment).
+ */
+ uint32_t reserved GNUNET_PACKED;
};
+GNUNET_NETWORK_STRUCT_END
+
+
+/**
+ * Our own peer identity.
+ */
+static struct GNUNET_PeerIdentity me;
+/**
+ * Callback invoked once our connection to CORE service is up.
+ *
+ * @param cls NULL
+ * @param my_identity our peer's identity
+ */
static void
core_init (void *cls,
- struct GNUNET_CORE_Handle * server,
- const struct GNUNET_PeerIdentity *
- my_identity,
- const struct
- GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *
- publicKey)
+ const struct GNUNET_PeerIdentity *my_identity)
{
- if (advertising && (NULL != server))
- {
- /* FIXME: provide "server" to 'hostlist' module */
- }
+ me = *my_identity;
+}
+
+
+/**
+ * Core handler for p2p hostlist advertisements
+ *
+ * @param cls closure
+ * @param message advertisement message we got
+ * @return #GNUNET_OK if message is well-formed
+ */
+static int
+check_advertisement (void *cls,
+ const struct GNUNET_MessageHeader *message)
+{
+ size_t size;
+ size_t uri_size;
+ const char *uri;
+
+ size = ntohs (message->size);
+ if (size <= sizeof (struct GNUNET_MessageHeader))
+ {
+ GNUNET_break_op (0);
+ return GNUNET_SYSERR;
+ }
+ uri = (const char *) &message[1];
+ uri_size = size - sizeof (struct GNUNET_MessageHeader);
+ if (uri[uri_size - 1] != '\0')
+ {
+ GNUNET_break_op (0);
+ return GNUNET_SYSERR;
+ }
+ return GNUNET_OK;
+}
+
+
+/**
+ * Core handler for p2p hostlist advertisements
+ *
+ * @param cls closure
+ * @param message advertisement message we got
+ * @return #GNUNET_OK on success
+ */
+static void
+handle_advertisement (void *cls,
+ const struct GNUNET_MessageHeader *message)
+{
+ const char *uri = (const char *) &message[1];
+
+ GNUNET_assert (NULL != client_adv_handler);
+ (void) (*client_adv_handler) (uri);
+}
+
+
+/**
+ * Method called whenever a given peer connects. Wrapper to call both
+ * client's and server's functions
+ *
+ * @param cls closure
+ * @param peer peer identity this notification is about
+ * @param mq queue for sending messages to @a peer
+ * @return peer
+ */
+static void *
+connect_handler (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ struct GNUNET_MQ_Handle *mq)
+{
+ if (0 == memcmp (&me,
+ peer,
+ sizeof (struct GNUNET_PeerIdentity)))
+ return NULL;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "A new peer connected, notifying client and server\n");
+ if (NULL != client_ch)
+ GNUNET_assert (NULL ==
+ (*client_ch) (cls,
+ peer,
+ mq));
+#if HAVE_MHD
+ if (NULL != server_ch)
+ GNUNET_assert (NULL ==
+ (*server_ch) (cls,
+ peer,
+ mq));
+#endif
+ return (void *) peer;
+}
+
+
+/**
+ * Method called whenever a given peer disconnects. Wrapper to call
+ * both client's and server's functions
+ *
+ * @param cls closure
+ * @param peer peer identity this notification is about
+ */
+static void
+disconnect_handler (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ void *internal_cls)
+{
+ if (0 == memcmp (&me,
+ peer,
+ sizeof (struct GNUNET_PeerIdentity)))
+ return;
+ /* call hostlist client disconnect handler */
+ if (NULL != client_dh)
+ (*client_dh) (cls,
+ peer,
+ NULL);
}
/**
* Last task run during shutdown. Disconnects us from
* the other services.
+ *
+ * @param cls NULL
*/
static void
-cleaning_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+cleaning_task (void *cls)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Hostlist daemon is shutting down.\n");
+ "Hostlist daemon is shutting down\n");
+ if (NULL != core)
+ {
+ GNUNET_CORE_disconnecT (core);
+ core = NULL;
+ }
if (bootstrapping)
- {
- GNUNET_HOSTLIST_client_stop ();
- }
+ {
+ GNUNET_HOSTLIST_client_stop ();
+ }
+#if HAVE_MHD
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;
- }
+ {
+ GNUNET_HOSTLIST_server_stop ();
+ }
+#endif
+ if (NULL != stats)
+ {
+ 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
+static void
run (void *cls,
- struct GNUNET_SCHEDULER_Handle * sched,
char *const *args,
const char *cfgfile,
- const struct GNUNET_CONFIGURATION_Handle * cfg)
+ const struct GNUNET_CONFIGURATION_Handle *cfg)
{
- GNUNET_CORE_ClientEventHandler ch = NULL;
- GNUNET_CORE_ClientEventHandler 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 (learning)
- {
- /* FIXME (register handler with core for hostlist ads) */
- }
+ struct GNUNET_MQ_MessageHandler learn_handlers[] = {
+ GNUNET_MQ_hd_var_size (advertisement,
+ GNUNET_MESSAGE_TYPE_HOSTLIST_ADVERTISEMENT,
+ struct GNUNET_MessageHeader,
+ NULL),
+ GNUNET_MQ_handler_end ()
+ };
+ struct GNUNET_MQ_MessageHandler no_learn_handlers[] = {
+ GNUNET_MQ_handler_end ()
+ };
+ if ((! bootstrapping) && (! learning)
+#if HAVE_MHD
+ && (! provide_hostlist)
+#endif
+ )
+ {
+ 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 ("hostlist", cfg);
+ if (NULL == stats)
+ {
+ GNUNET_break (0);
+ return;
+ }
if (bootstrapping)
- {
- GNUNET_HOSTLIST_client_start (cfg, sched, stats,
- &ch, &dh);
- }
+ GNUNET_HOSTLIST_client_start (cfg,
+ stats,
+ &client_ch,
+ &client_dh,
+ &client_adv_handler,
+ learning);
+ core =
+ GNUNET_CORE_connecT (cfg,
+ NULL,
+ &core_init,
+ &connect_handler,
+ &disconnect_handler,
+ learning ? learn_handlers : no_learn_handlers);
+
+
+#if HAVE_MHD
if (provide_hostlist)
- {
- GNUNET_HOSTLIST_server_start (cfg, sched, stats);
- }
- core = GNUNET_CORE_connect (sched, cfg,
- GNUNET_TIME_UNIT_FOREVER_REL,
- NULL,
- &core_init,
- ch, dh,
- NULL, GNUNET_NO,
- NULL, GNUNET_NO,
- handlers);
- GNUNET_SCHEDULER_add_delayed (sched,
- GNUNET_TIME_UNIT_FOREVER_REL,
- &cleaning_task, NULL);
+ GNUNET_HOSTLIST_server_start (cfg,
+ stats,
+ core,
+ &server_ch,
+ advertising);
+#endif
+ GNUNET_SCHEDULER_add_shutdown (&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;
- }
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to connect to `%s' service.\n"), "core");
+ GNUNET_SCHEDULER_shutdown ();
+ return;
+ }
}
int
main (int argc, char *const *argv)
{
+ static const struct GNUNET_GETOPT_CommandLineOption options[] = {
+#if HAVE_MHD
+ {'a', "advertise", NULL,
+ gettext_noop ("advertise our hostlist to other peers"),
+ GNUNET_NO, &GNUNET_GETOPT_set_one, &advertising},
+#endif
+ {'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},
+#if HAVE_MHD
+ {'p', "provide-hostlist", NULL,
+ gettext_noop ("provide a hostlist server"),
+ GNUNET_NO, &GNUNET_GETOPT_set_one, &provide_hostlist},
+#endif
+ GNUNET_GETOPT_OPTION_END
+ };
+
int ret;
- ret = (GNUNET_OK ==
- GNUNET_PROGRAM_run (argc,
- argv,
- "hostlist",
- _("GNUnet hostlist server and client"),
- options,
- &run, NULL)) ? 0 : 1;
+ if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
+ return 2;
+
+ GNUNET_log_setup ("hostlist", "WARNING", NULL);
+ ret =
+ (GNUNET_OK ==
+ GNUNET_PROGRAM_run (argc, argv,
+ "hostlist",
+ _("GNUnet hostlist server and client"),
+ options,
+ &run, NULL)) ? 0 : 1;
+ GNUNET_free ((void*) argv);
return ret;
}
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