2 This file is part of GNUnet
3 Copyright (C) 2017 GNUnet e.V.
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., 51 Franklin Street, Fifth Floor,
18 Boston, MA 02110-1301, USA.
22 * @file consensus/plugin_block_consensus.c
23 * @brief consensus block, either nested block or marker
24 * @author Christian Grothoff
28 #include "consensus_protocol.h"
29 #include "gnunet_block_plugin.h"
30 #include "gnunet_block_group_lib.h"
34 * Function called to validate a reply or a request. For
35 * request evaluation, simply pass "NULL" for the reply_block.
39 * @param type block type
40 * @param group block group to use
41 * @param eo control flags
42 * @param query original query (hash)
43 * @param xquery extrended query data (can be NULL, depending on type)
44 * @param xquery_size number of bytes in xquery
45 * @param reply_block response to validate
46 * @param reply_block_size number of bytes in reply block
47 * @return characterization of result
49 static enum GNUNET_BLOCK_EvaluationResult
50 block_plugin_consensus_evaluate (void *cls,
51 struct GNUNET_BLOCK_Context *ctx,
52 enum GNUNET_BLOCK_Type type,
53 struct GNUNET_BLOCK_Group *group,
54 enum GNUNET_BLOCK_EvaluationOptions eo,
55 const struct GNUNET_HashCode *query,
58 const void *reply_block,
59 size_t reply_block_size)
61 if (reply_block_size < sizeof (struct ConsensusElement))
62 return GNUNET_BLOCK_EVALUATION_RESULT_INVALID;
64 const struct ConsensusElement *ce = reply_block;
66 if ( (0 != ce->marker) ||
67 (0 == ce->payload_type ) )
68 return GNUNET_BLOCK_EVALUATION_OK_MORE;
70 return GNUNET_BLOCK_evaluate (ctx,
78 reply_block_size - sizeof (struct ConsensusElement));
83 * Function called to obtain the key for a block.
86 * @param type block type
87 * @param block block to get the key for
88 * @param block_size number of bytes in block
89 * @param key set to the key (query) for the given block
90 * @return #GNUNET_OK on success, #GNUNET_SYSERR if type not supported
91 * (or if extracting a key from a block of this type does not work)
94 block_plugin_consensus_get_key (void *cls,
95 enum GNUNET_BLOCK_Type type,
98 struct GNUNET_HashCode *key)
100 return GNUNET_SYSERR;
105 * Entry point for the plugin.
108 libgnunet_plugin_block_consensus_init (void *cls)
110 static enum GNUNET_BLOCK_Type types[] =
112 GNUNET_BLOCK_TYPE_CONSENSUS_ELEMENT,
113 GNUNET_BLOCK_TYPE_ANY /* end of list */
115 struct GNUNET_BLOCK_PluginFunctions *api;
117 api = GNUNET_new (struct GNUNET_BLOCK_PluginFunctions);
118 api->evaluate = &block_plugin_consensus_evaluate;
119 api->get_key = &block_plugin_consensus_get_key;
126 * Exit point from the plugin.
129 libgnunet_plugin_block_consensus_done (void *cls)
131 struct GNUNET_BLOCK_PluginFunctions *api = cls;
137 /* end of plugin_block_consensus.c */