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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 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-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 ("spezifies 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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