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_template.c
23 * @brief template for a block plugin
24 * @author Christian Grothoff
28 #include "gnunet_block_plugin.h"
30 #define DEBUG_TEMPLATE GNUNET_EXTRA_LOGGING
34 * Function called to validate a reply or a request. For
35 * request evaluation, simply pass "NULL" for the reply_block.
38 * @param type block type
39 * @param query original query (hash)
40 * @param bf pointer to bloom filter associated with query; possibly updated (!)
41 * @param bf_mutator mutation value for bf
42 * @param xquery extrended query data (can be NULL, depending on type)
43 * @param xquery_size number of bytes in xquery
44 * @param reply_block response to validate
45 * @param reply_block_size number of bytes in reply block
46 * @return characterization of result
48 static enum GNUNET_BLOCK_EvaluationResult
49 block_plugin_template_evaluate (void *cls, enum GNUNET_BLOCK_Type type,
50 const struct GNUNET_HashCode * query,
51 struct GNUNET_CONTAINER_BloomFilter **bf,
52 int32_t bf_mutator, const void *xquery,
53 size_t xquery_size, const void *reply_block,
54 size_t reply_block_size)
56 struct GNUNET_HashCode chash;
57 struct GNUNET_HashCode mhash;
58 /* FIXME: check validity first... */
60 /* mandatory duplicate-detection code... */
63 GNUNET_CRYPTO_hash (reply_block, reply_block_size, &chash);
64 GNUNET_BLOCK_mingle_hash (&chash, bf_mutator, &mhash);
67 if (GNUNET_YES == GNUNET_CONTAINER_bloomfilter_test (*bf, &mhash))
68 return GNUNET_BLOCK_EVALUATION_OK_DUPLICATE;
72 *bf = GNUNET_CONTAINER_bloomfilter_init (NULL, 8, 64 /* BLOOMFILTER_K */);
74 GNUNET_CONTAINER_bloomfilter_add (*bf, &mhash);
76 /* FIXME: other stuff here... */
77 return GNUNET_BLOCK_EVALUATION_TYPE_NOT_SUPPORTED;
82 * Function called to obtain the key for a block.
85 * @param type block type
86 * @param block block to get the key for
87 * @param block_size number of bytes in block
88 * @param key set to the key (query) for the given block
89 * @return GNUNET_OK on success, GNUNET_SYSERR if type not supported
90 * (or if extracting a key from a block of this type does not work)
93 block_plugin_template_get_key (void *cls, enum GNUNET_BLOCK_Type type,
94 const void *block, size_t block_size,
95 struct GNUNET_HashCode * key)
102 * Entry point for the plugin.
105 libgnunet_plugin_block_template_init (void *cls)
107 static enum GNUNET_BLOCK_Type types[] =
109 /* FIXME: insert supported block types here */
110 GNUNET_BLOCK_TYPE_ANY /* end of list */
112 struct GNUNET_BLOCK_PluginFunctions *api;
114 api = GNUNET_malloc (sizeof (struct GNUNET_BLOCK_PluginFunctions));
115 api->evaluate = &block_plugin_template_evaluate;
116 api->get_key = &block_plugin_template_get_key;
123 * Exit point from the plugin.
126 libgnunet_plugin_block_template_done (void *cls)
128 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
134 /* end of plugin_block_template.c */