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- /*
- This file is part of GNUnet.
- Copyright (C) 2012, 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.
- You should have received a copy of the GNU Affero General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- SPDX-License-Identifier: AGPL3.0-or-later
- */
- /**
- * @file gnunet-namecache.c
- * @brief command line tool to inspect the name cache
- * @author Christian Grothoff
- *
- * TODO:
- * - test
- */
- #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_namecache_service.h"
- /**
- * Handle to the namecache.
- */
- static struct GNUNET_NAMECACHE_Handle *ns;
- /**
- * Queue entry for the 'query' operation.
- */
- static struct GNUNET_NAMECACHE_QueueEntry *qe;
- /**
- * Name (label) of the records to list.
- */
- static char *name;
- /**
- * Public key of the zone to look in.
- */
- static struct GNUNET_CRYPTO_EcdsaPublicKey pubkey;
- /**
- * Public key of the zone to look in, in ASCII.
- */
- static char *pkey;
- /**
- * Global return value
- */
- static int ret;
- /**
- * Task run on shutdown. Cleans up everything.
- *
- * @param cls unused
- */
- static void
- do_shutdown (void *cls)
- {
- if (NULL != qe)
- {
- GNUNET_NAMECACHE_cancel (qe);
- qe = NULL;
- }
- if (NULL != ns)
- {
- GNUNET_NAMECACHE_disconnect (ns);
- ns = NULL;
- }
- }
- /**
- * Process a record that was stored in the namecache in a block.
- *
- * @param cls closure, NULL
- * @param rd_len number of entries in @a rd array
- * @param rd array of records with data to store
- */
- static void
- display_records_from_block (void *cls,
- unsigned int rd_len,
- const struct GNUNET_GNSRECORD_Data *rd)
- {
- const char *typestring;
- char *s;
- unsigned int i;
- if (0 == rd_len)
- {
- FPRINTF (stdout,
- _("No records found for `%s'"),
- name);
- return;
- }
- FPRINTF (stdout,
- "%s:\n",
- name);
- for (i=0;i<rd_len;i++)
- {
- typestring = GNUNET_GNSRECORD_number_to_typename (rd[i].record_type);
- s = GNUNET_GNSRECORD_value_to_string (rd[i].record_type,
- rd[i].data,
- rd[i].data_size);
- if (NULL == s)
- {
- FPRINTF (stdout, _("\tCorrupt or unsupported record of type %u\n"),
- (unsigned int) rd[i].record_type);
- continue;
- }
- FPRINTF (stdout,
- "\t%s: %s\n",
- typestring,
- s);
- GNUNET_free (s);
- }
- FPRINTF (stdout, "%s", "\n");
- }
- /**
- * Display block obtained from listing (by name).
- *
- * @param cls NULL
- * @param block NULL if not found
- */
- static void
- handle_block (void *cls,
- const struct GNUNET_GNSRECORD_Block *block)
- {
- qe = NULL;
- if (NULL == block)
- {
- fprintf (stderr,
- "No matching block found\n");
- }
- else if (GNUNET_OK !=
- GNUNET_GNSRECORD_block_decrypt (block,
- &pubkey,
- name,
- &display_records_from_block,
- NULL))
- {
- fprintf (stderr,
- "Failed to decrypt block!\n");
- }
- GNUNET_SCHEDULER_shutdown ();
- }
- /**
- * 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 cfg configuration
- */
- static void
- run (void *cls, char *const *args, const char *cfgfile,
- const struct GNUNET_CONFIGURATION_Handle *cfg)
- {
- struct GNUNET_HashCode dhash;
- if (NULL == pkey)
- {
- fprintf (stderr,
- _("You must specify which zone should be accessed\n"));
- return;
- }
- if (GNUNET_OK !=
- GNUNET_CRYPTO_ecdsa_public_key_from_string (pkey,
- strlen (pkey),
- &pubkey))
- {
- fprintf (stderr,
- _("Invalid public key for zone `%s'\n"),
- pkey);
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
- if (NULL == name)
- {
- fprintf (stderr,
- _("You must specify a name\n"));
- return;
- }
- GNUNET_SCHEDULER_add_shutdown (&do_shutdown,
- NULL);
- ns = GNUNET_NAMECACHE_connect (cfg);
- GNUNET_GNSRECORD_query_from_public_key (&pubkey,
- name,
- &dhash);
- qe = GNUNET_NAMECACHE_lookup_block (ns,
- &dhash,
- &handle_block,
- NULL);
- }
- /**
- * The main function for gnunet-namecache.
- *
- * @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 ('n',
- "name",
- "NAME",
- gettext_noop ("name of the record to add/delete/display"),
- &name),
- GNUNET_GETOPT_option_string ('z',
- "zone",
- "PKEY",
- gettext_noop ("specifies the public key of the zone to look in"),
- &pkey),
- GNUNET_GETOPT_OPTION_END
- };
- if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
- return 2;
- GNUNET_log_setup ("gnunet-namecache", "WARNING", NULL);
- if (GNUNET_OK !=
- GNUNET_PROGRAM_run (argc, argv, "gnunet-namecache",
- _("GNUnet zone manipulation tool"),
- options,
- &run, NULL))
- {
- GNUNET_free ((void*) argv);
- return 1;
- }
- GNUNET_free ((void*) argv);
- return ret;
- }
- /* end of gnunet-namecache.c */
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