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- /*
- This file is part of GNUnet.
- Copyright (C) 2012-2013, 2017 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 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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA.
- */
- /**
- * @file gnunet-gns.c
- * @brief command line tool to access distributed GNS
- * @author Christian Grothoff
- */
- #include "platform.h"
- #include <gnunet_util_lib.h>
- #include <gnunet_dnsparser_lib.h>
- #include <gnunet_identity_service.h>
- #include <gnunet_gnsrecord_lib.h>
- #include <gnunet_namestore_service.h>
- #include <gnunet_gns_service.h>
- /**
- * Configuration we are using.
- */
- static const struct GNUNET_CONFIGURATION_Handle *cfg;
- /**
- * Handle to GNS service.
- */
- static struct GNUNET_GNS_Handle *gns;
- /**
- * Desired timeout for the lookup (default is no timeout).
- */
- static struct GNUNET_TIME_Relative timeout;
- /**
- * GNS name to lookup. (-u option)
- */
- static char *lookup_name;
- /**
- * record type to look up (-t option)
- */
- static char *lookup_type;
- /**
- * Identity of the zone to use for the lookup (-z option)
- */
- static char *zone_ego_name;
- /**
- * Public key of the zone to use for the lookup (-p option)
- */
- static char *public_key;
- /**
- * Set to GNUNET_GNS_LO_LOCAL_MASTER if we are looking up in the master zone.
- */
- static enum GNUNET_GNS_LocalOptions local_options;
- /**
- * raw output
- */
- static int raw;
- /**
- * Requested record type.
- */
- static int rtype;
- /**
- * Handle to lookup request
- */
- static struct GNUNET_GNS_LookupRequest *lookup_request;
- /**
- * Lookup an ego with the identity service.
- */
- static struct GNUNET_IDENTITY_EgoLookup *el;
- /**
- * Handle for identity service.
- */
- static struct GNUNET_IDENTITY_Handle *identity;
- /**
- * Active operation on identity service.
- */
- static struct GNUNET_IDENTITY_Operation *id_op;
- /**
- * Task scheduled to handle timeout.
- */
- static struct GNUNET_SCHEDULER_Task *tt;
- /**
- * Task run on shutdown. Cleans up everything.
- *
- * @param cls unused
- */
- static void
- do_shutdown (void *cls)
- {
- if (NULL != el)
- {
- GNUNET_IDENTITY_ego_lookup_cancel (el);
- el = NULL;
- }
- if (NULL != id_op)
- {
- GNUNET_IDENTITY_cancel (id_op);
- id_op = NULL;
- }
- if (NULL != lookup_request)
- {
- GNUNET_GNS_lookup_cancel (lookup_request);
- lookup_request = NULL;
- }
- if (NULL != identity)
- {
- GNUNET_IDENTITY_disconnect (identity);
- identity = NULL;
- }
- if (NULL != gns)
- {
- GNUNET_GNS_disconnect (gns);
- gns = NULL;
- }
- if (NULL != tt)
- {
- GNUNET_SCHEDULER_cancel (tt);
- tt = NULL;
- }
- }
- /**
- * Task run on timeout. Triggers shutdown.
- *
- * @param cls unused
- */
- static void
- do_timeout (void *cls)
- {
- tt = NULL;
- GNUNET_SCHEDULER_shutdown ();
- }
- /**
- * Function called with the result of a GNS lookup.
- *
- * @param cls the 'const char *' name that was resolved
- * @param rd_count number of records returned
- * @param rd array of @a rd_count records with the results
- */
- static void
- process_lookup_result (void *cls,
- uint32_t rd_count,
- const struct GNUNET_GNSRECORD_Data *rd)
- {
- const char *name = cls;
- uint32_t i;
- const char *typename;
- char* string_val;
- lookup_request = NULL;
- if (!raw)
- {
- if (0 == rd_count)
- printf ("No results.\n");
- else
- printf ("%s:\n",
- name);
- }
- for (i=0; i<rd_count; i++)
- {
- if ( (rd[i].record_type != rtype) &&
- (GNUNET_GNSRECORD_TYPE_ANY != rtype) )
- continue;
- typename = GNUNET_GNSRECORD_number_to_typename (rd[i].record_type);
- string_val = GNUNET_GNSRECORD_value_to_string (rd[i].record_type,
- rd[i].data,
- rd[i].data_size);
- if (NULL == string_val)
- {
- fprintf (stderr,
- "Record %u of type %d malformed, skipping\n",
- (unsigned int) i,
- (int) rd[i].record_type);
- continue;
- }
- if (raw)
- printf ("%s\n",
- string_val);
- else
- printf ("Got `%s' record: %s\n",
- typename,
- string_val);
- GNUNET_free (string_val);
- }
- GNUNET_SCHEDULER_shutdown ();
- }
- /**
- * Perform the actual resolution, starting with the zone
- * identified by the given public key and the shorten zone.
- *
- * @param pkey public key to use for the zone, can be NULL
- */
- static void
- lookup_with_public_key (const struct GNUNET_CRYPTO_EcdsaPublicKey *pkey)
- {
- if (NULL != lookup_type)
- rtype = GNUNET_GNSRECORD_typename_to_number (lookup_type);
- else
- rtype = GNUNET_DNSPARSER_TYPE_A;
- if (UINT32_MAX == rtype)
- {
- fprintf (stderr,
- _("Invalid typename specified, assuming `ANY'\n"));
- rtype = GNUNET_GNSRECORD_TYPE_ANY;
- }
- if (NULL != lookup_name)
- {
- lookup_request = GNUNET_GNS_lookup (gns,
- lookup_name,
- pkey,
- rtype,
- local_options,
- &process_lookup_result,
- lookup_name);
- }
- else
- {
- fprintf (stderr,
- _("Please specify name to lookup!\n"));
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
- }
- /**
- * Method called to with the ego we are to use for the lookup,
- * when the ego is determined by a name.
- *
- * @param cls closure (NULL, unused)
- * @param ego ego handle, NULL if not found
- */
- static void
- identity_zone_cb (void *cls,
- const struct GNUNET_IDENTITY_Ego *ego)
- {
- struct GNUNET_CRYPTO_EcdsaPublicKey pkey;
- el = NULL;
- if (NULL == ego)
- {
- fprintf (stderr,
- _("Ego for `%s' not found, cannot perform lookup.\n"),
- zone_ego_name);
- GNUNET_SCHEDULER_shutdown ();
- }
- else
- {
- GNUNET_IDENTITY_ego_get_public_key (ego, &pkey);
- lookup_with_public_key (&pkey);
- }
- GNUNET_free_non_null (zone_ego_name);
- zone_ego_name = NULL;
- }
- /**
- * Method called to with the ego we are to use for the lookup,
- * when the ego is the one for the default master zone.
- *
- * @param cls closure (NULL, unused)
- * @param ego ego handle, NULL if not found
- * @param ctx context for application to store data for this ego
- * (during the lifetime of this process, initially NULL)
- * @param name name assigned by the user for this ego,
- * NULL if the user just deleted the ego and it
- * must thus no longer be used
- */
- static void
- identity_master_cb (void *cls,
- struct GNUNET_IDENTITY_Ego *ego,
- void **ctx,
- const char *name)
- {
- struct GNUNET_CRYPTO_EcdsaPublicKey pkey;
- const char *dot;
- id_op = NULL;
- if (NULL == ego)
- {
- fprintf (stderr,
- _("Ego for `gns-master' not found, cannot perform lookup. Did you run gnunet-gns-import.sh?\n"));
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
- GNUNET_IDENTITY_ego_get_public_key (ego, &pkey);
- /* main name is our own master zone, do no look for that in the DHT */
- local_options = GNUNET_GNS_LO_LOCAL_MASTER;
- /* if the name is of the form 'label.gnu', never go to the DHT */
- dot = NULL;
- if (NULL != lookup_name)
- dot = strchr (lookup_name, '.');
- if ( (NULL != dot) &&
- (0 == strcasecmp (dot, ".gnu")) )
- local_options = GNUNET_GNS_LO_NO_DHT;
- lookup_with_public_key (&pkey);
- }
- /**
- * Main function that will be run.
- *
- * @param cls closure
- * @param args remaining command-line arguments
- * @param cfgfile name of the configuration file used (for saving, can be NULL!)
- * @param c configuration
- */
- static void
- run (void *cls,
- char *const *args,
- const char *cfgfile,
- const struct GNUNET_CONFIGURATION_Handle *c)
- {
- struct GNUNET_CRYPTO_EcdsaPublicKey pkey;
- cfg = c;
- gns = GNUNET_GNS_connect (cfg);
- if (NULL == gns)
- {
- fprintf (stderr,
- _("Failed to connect to GNS\n"));
- return;
- }
- tt = GNUNET_SCHEDULER_add_delayed (timeout,
- &do_timeout,
- NULL);
- GNUNET_SCHEDULER_add_shutdown (&do_shutdown,
- NULL);
- identity = GNUNET_IDENTITY_connect (cfg,
- NULL,
- NULL);
- if (NULL != public_key)
- {
- if (GNUNET_OK !=
- GNUNET_CRYPTO_ecdsa_public_key_from_string (public_key,
- strlen (public_key),
- &pkey))
- {
- fprintf (stderr,
- _("Public key `%s' is not well-formed\n"),
- public_key);
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
- lookup_with_public_key (&pkey);
- return;
- }
- if (NULL != zone_ego_name)
- {
- el = GNUNET_IDENTITY_ego_lookup (cfg,
- zone_ego_name,
- &identity_zone_cb,
- NULL);
- return;
- }
- if ( (NULL != lookup_name) &&
- (strlen (lookup_name) > 4) &&
- (0 == strcmp (".zkey",
- &lookup_name[strlen (lookup_name) - 4])) )
- {
- /* no zone required, use 'anonymous' zone */
- GNUNET_CRYPTO_ecdsa_key_get_public (GNUNET_CRYPTO_ecdsa_key_get_anonymous (),
- &pkey);
- lookup_with_public_key (&pkey);
- }
- else
- {
- GNUNET_break (NULL == id_op);
- id_op = GNUNET_IDENTITY_get (identity,
- "gns-master",
- &identity_master_cb,
- NULL);
- GNUNET_assert (NULL != id_op);
- }
- }
- /**
- * The main function for gnunet-gns.
- *
- * @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)
- {
- struct GNUNET_GETOPT_CommandLineOption options[] = {
- GNUNET_GETOPT_option_string ('u',
- "lookup",
- "NAME",
- gettext_noop ("Lookup a record for the given name"),
- &lookup_name),
- GNUNET_GETOPT_option_string ('t',
- "type",
- "TYPE",
- gettext_noop ("Specify the type of the record to lookup"),
- &lookup_type),
- GNUNET_GETOPT_option_relative_time ('T',
- "timeout",
- "DELAY",
- gettext_noop ("Specify timeout for the lookup"),
- &timeout),
- GNUNET_GETOPT_option_flag ('r',
- "raw",
- gettext_noop ("No unneeded output"),
- &raw),
- GNUNET_GETOPT_option_string ('p',
- "public-key",
- "PKEY",
- gettext_noop ("Specify the public key of the zone to lookup the record in"),
- &public_key),
-
- GNUNET_GETOPT_option_string ('z',
- "zone",
- "NAME",
- gettext_noop ("Specify the name of the ego of the zone to lookup the record in"),
- &zone_ego_name),
- GNUNET_GETOPT_OPTION_END
- };
- int ret;
- timeout = GNUNET_TIME_UNIT_FOREVER_REL;
- if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv,
- &argc, &argv))
- return 2;
- GNUNET_log_setup ("gnunet-gns",
- "WARNING",
- NULL);
- ret =
- (GNUNET_OK ==
- GNUNET_PROGRAM_run (argc, argv,
- "gnunet-gns",
- _("GNUnet GNS resolver tool"),
- options,
- &run, NULL)) ? 0 : 1;
- GNUNET_free ((void*) argv);
- return ret;
- }
- /* end of gnunet-gns.c */
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