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/*
This file is part of GNUnet.
(C) 2012 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 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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/**
* @file consensus/gnunet-consensus-ibf
* @brief tool for reconciling data with invertible bloom filters
* @author Florian Dold
*/
#include "platform.h"
#include "gnunet_common.h"
#include "gnunet_container_lib.h"
#include "gnunet_util_lib.h"
#include "ibf.h"
static unsigned int asize = 10;
static unsigned int bsize = 10;
static unsigned int csize = 10;
static unsigned int hash_num = 3;
static unsigned int ibf_size = 80;
static struct GNUNET_CONTAINER_MultiHashMap *set_a;
static struct GNUNET_CONTAINER_MultiHashMap *set_b;
/* common elements in a and b */
static struct GNUNET_CONTAINER_MultiHashMap *set_c;
static struct InvertibleBloomFilter *ibf_a;
static struct InvertibleBloomFilter *ibf_b;
static int
insert_iterator (void *cls,
const struct GNUNET_HashCode *key,
void *value)
{
struct InvertibleBloomFilter *ibf = (struct InvertibleBloomFilter *) cls;
ibf_insert (ibf, key);
return GNUNET_YES;
}
static void
run (void *cls, char *const *args, const char *cfgfile,
const struct GNUNET_CONFIGURATION_Handle *cfg)
{
struct GNUNET_HashCode id;
int i;
int side;
int res;
struct GNUNET_TIME_Absolute start_time;
struct GNUNET_TIME_Relative delta_time;
set_a = GNUNET_CONTAINER_multihashmap_create (((asize == 0) ? 1 : (asize + csize)),
GNUNET_NO);
set_b = GNUNET_CONTAINER_multihashmap_create (((bsize == 0) ? 1 : (bsize + csize)),
GNUNET_NO);
set_c = GNUNET_CONTAINER_multihashmap_create (((csize == 0) ? 1 : csize),
GNUNET_NO);
printf ("hash-num=%u, size=%u, #(A-B)=%u, #(B-A)=%u, #(A&B)=%u\n",
hash_num, ibf_size, asize, bsize, csize);
i = 0;
while (i < asize)
{
GNUNET_CRYPTO_hash_create_random (GNUNET_CRYPTO_QUALITY_WEAK, &id);
if (GNUNET_YES == GNUNET_CONTAINER_multihashmap_contains (set_a, &id))
continue;
GNUNET_CONTAINER_multihashmap_put (
set_a, &id, NULL, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
i++;
}
i = 0;
while (i < bsize)
{
GNUNET_CRYPTO_hash_create_random (GNUNET_CRYPTO_QUALITY_WEAK, &id);
if (GNUNET_YES == GNUNET_CONTAINER_multihashmap_contains (set_a, &id))
continue;
if (GNUNET_YES == GNUNET_CONTAINER_multihashmap_contains (set_b, &id))
continue;
GNUNET_CONTAINER_multihashmap_put (
set_b, &id, NULL, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
i++;
}
i = 0;
while (i < csize)
{
GNUNET_CRYPTO_hash_create_random (GNUNET_CRYPTO_QUALITY_WEAK, &id);
if (GNUNET_YES == GNUNET_CONTAINER_multihashmap_contains (set_a, &id))
continue;
if (GNUNET_YES == GNUNET_CONTAINER_multihashmap_contains (set_b, &id))
continue;
GNUNET_CONTAINER_multihashmap_put (
set_c, &id, NULL, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
i++;
}
ibf_a = ibf_create (ibf_size, hash_num, 0);
ibf_b = ibf_create (ibf_size, hash_num, 0);
start_time = GNUNET_TIME_absolute_get ();
GNUNET_CONTAINER_multihashmap_iterate (set_a, &insert_iterator, ibf_a);
GNUNET_CONTAINER_multihashmap_iterate (set_b, &insert_iterator, ibf_b);
GNUNET_CONTAINER_multihashmap_iterate (set_c, &insert_iterator, ibf_a);
GNUNET_CONTAINER_multihashmap_iterate (set_c, &insert_iterator, ibf_b);
delta_time = GNUNET_TIME_absolute_get_duration (start_time);
printf ("encoded in: %s\n", GNUNET_STRINGS_relative_time_to_string (delta_time, GNUNET_NO));
ibf_subtract (ibf_a, ibf_b);
start_time = GNUNET_TIME_absolute_get ();
for (;;)
{
res = ibf_decode (ibf_a, &side, &id);
if (GNUNET_SYSERR == res)
{
printf ("decode failed\n");
return;
}
if (GNUNET_NO == res)
{
if ((0 == GNUNET_CONTAINER_multihashmap_size (set_b)) &&
(0 == GNUNET_CONTAINER_multihashmap_size (set_a)))
{
delta_time = GNUNET_TIME_absolute_get_duration (start_time);
printf ("decoded successfully in: %s\n", GNUNET_STRINGS_relative_time_to_string (delta_time, GNUNET_NO));
}
else
printf ("decode missed elements\n");
return;
}
if (side == 1)
res = GNUNET_CONTAINER_multihashmap_remove (set_a, &id, NULL);
if (side == -1)
res = GNUNET_CONTAINER_multihashmap_remove (set_b, &id, NULL);
if (GNUNET_YES != res)
{
printf ("decoded wrong element\n");
return;
}
}
}
int
main (int argc, char **argv)
{
static const struct GNUNET_GETOPT_CommandLineOption options[] = {
{'A', "asize", NULL,
gettext_noop ("number of element in set A-B"), 1,
&GNUNET_GETOPT_set_uint, &asize},
{'B', "bsize", NULL,
gettext_noop ("number of element in set B-A"), 1,
&GNUNET_GETOPT_set_uint, &bsize},
{'C', "csize", NULL,
gettext_noop ("number of common elements in A and B"), 1,
&GNUNET_GETOPT_set_uint, &csize},
{'k', "hash-num", NULL,
gettext_noop ("hash num"), 1,
&GNUNET_GETOPT_set_uint, &hash_num},
{'s', "ibf-size", NULL,
gettext_noop ("ibf size"), 1,
&GNUNET_GETOPT_set_uint, &ibf_size},
GNUNET_GETOPT_OPTION_END
};
GNUNET_PROGRAM_run2 (argc, argv, "gnunet-consensus-ibf",
"help",
options, &run, NULL, GNUNET_YES);
return 0;
}
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