2 This file is part of GNUnet
3 (C) 2010 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file block/plugin_block_test.c
23 * @brief block plugin to test the DHT as a simple key-value store;
24 * this plugin simply accepts any (new) response for any key
25 * @author Christian Grothoff
29 #include "gnunet_block_plugin.h"
33 * Number of bits we set per entry in the bloomfilter.
36 #define BLOOMFILTER_K 16
39 * Function called to validate a reply or a request. For
40 * request evaluation, simply pass "NULL" for the reply_block.
43 * @param type block type
44 * @param query original query (hash)
45 * @param bf pointer to bloom filter associated with query; possibly updated (!)
46 * @param bf_mutator mutation value for bf
47 * @param xquery extrended query data (can be NULL, depending on type)
48 * @param xquery_size number of bytes in xquery
49 * @param reply_block response to validate
50 * @param reply_block_size number of bytes in reply block
51 * @return characterization of result
53 static enum GNUNET_BLOCK_EvaluationResult
54 block_plugin_test_evaluate (void *cls, enum GNUNET_BLOCK_Type type,
55 const struct GNUNET_HashCode * query,
56 struct GNUNET_CONTAINER_BloomFilter **bf,
57 int32_t bf_mutator, const void *xquery,
58 size_t xquery_size, const void *reply_block,
59 size_t reply_block_size)
61 struct GNUNET_HashCode chash;
62 struct GNUNET_HashCode mhash;
64 if ( GNUNET_BLOCK_TYPE_TEST != type)
65 return GNUNET_BLOCK_EVALUATION_TYPE_NOT_SUPPORTED;
69 return GNUNET_BLOCK_EVALUATION_REQUEST_INVALID;
71 if (NULL == reply_block)
72 return GNUNET_BLOCK_EVALUATION_REQUEST_VALID;
76 GNUNET_CRYPTO_hash (reply_block, reply_block_size, &chash);
77 GNUNET_BLOCK_mingle_hash (&chash, bf_mutator, &mhash);
80 if (GNUNET_YES == GNUNET_CONTAINER_bloomfilter_test (*bf, &mhash))
81 return GNUNET_BLOCK_EVALUATION_OK_DUPLICATE;
85 *bf = GNUNET_CONTAINER_bloomfilter_init (NULL, 8, BLOOMFILTER_K);
87 GNUNET_CONTAINER_bloomfilter_add (*bf, &mhash);
89 return GNUNET_BLOCK_EVALUATION_OK_MORE;
94 * Function called to obtain the key for a block.
97 * @param type block type
98 * @param block block to get the key for
99 * @param block_size number of bytes in block
100 * @param key set to the key (query) for the given block
101 * @return GNUNET_OK on success, GNUNET_SYSERR if type not supported
102 * (or if extracting a key from a block of this type does not work)
105 block_plugin_test_get_key (void *cls, enum GNUNET_BLOCK_Type type,
106 const void *block, size_t block_size,
107 struct GNUNET_HashCode * key)
109 /* always fails since there is no fixed relationship between
110 * keys and values for test values */
111 return GNUNET_SYSERR;
116 * Entry point for the plugin.
119 libgnunet_plugin_block_test_init (void *cls)
121 static enum GNUNET_BLOCK_Type types[] =
123 GNUNET_BLOCK_TYPE_TEST,
124 GNUNET_BLOCK_TYPE_ANY /* end of list */
126 struct GNUNET_BLOCK_PluginFunctions *api;
128 api = GNUNET_malloc (sizeof (struct GNUNET_BLOCK_PluginFunctions));
129 api->evaluate = &block_plugin_test_evaluate;
130 api->get_key = &block_plugin_test_get_key;
137 * Exit point from the plugin.
140 libgnunet_plugin_block_test_done (void *cls)
142 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
148 /* end of plugin_block_test.c */