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/*
This file is part of GNUnet
Copyright (C) 2017 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License,
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
Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
SPDX-License-Identifier: AGPL3.0-or-later
*/
/**
* @file setu/plugin_block_setu_test.c
* @brief set test block, recognizes elements with non-zero first byte as invalid
* @author Christian Grothoff
*/
#include "platform.h"
#include "gnunet_block_plugin.h"
#include "gnunet_block_group_lib.h"
/**
* Function called to validate a reply or a request. For
* request evaluation, simply pass "NULL" for the reply_block.
*
* @param cls closure
* @param ctx block context
* @param type block type
* @param group block group to use
* @param eo control flags
* @param query original query (hash)
* @param xquery extrended query data (can be NULL, depending on type)
* @param xquery_size number of bytes in xquery
* @param reply_block response to validate
* @param reply_block_size number of bytes in reply block
* @return characterization of result
*/
static enum GNUNET_BLOCK_EvaluationResult
block_plugin_setu_test_evaluate (void *cls,
struct GNUNET_BLOCK_Context *ctx,
enum GNUNET_BLOCK_Type type,
struct GNUNET_BLOCK_Group *group,
enum GNUNET_BLOCK_EvaluationOptions eo,
const struct GNUNET_HashCode *query,
const void *xquery,
size_t xquery_size,
const void *reply_block,
size_t reply_block_size)
{
if ((NULL == reply_block) ||
(reply_block_size == 0) ||
(0 != ((char *) reply_block)[0]))
return GNUNET_BLOCK_EVALUATION_RESULT_INVALID;
return GNUNET_BLOCK_EVALUATION_OK_MORE;
}
/**
* Function called to validate a query.
*
* @param cls closure
* @param ctx block context
* @param type block type
* @param query original query (hash)
* @param xquery extrended query data (can be NULL, depending on type)
* @param xquery_size number of bytes in @a xquery
* @return #GNUNET_OK if the query is fine, #GNUNET_NO if not
*/
static enum GNUNET_GenericReturnValue
block_plugin_setu_test_check_query (void *cls,
enum GNUNET_BLOCK_Type type,
const struct GNUNET_HashCode *query,
const void *xquery,
size_t xquery_size)
{
return GNUNET_OK;
}
/**
* Function called to validate a block for storage.
*
* @param cls closure
* @param type block type
* @param query key for the block (hash), must match exactly
* @param block block data to validate
* @param block_size number of bytes in @a block
* @return #GNUNET_OK if the block is fine, #GNUNET_NO if not
*/
static enum GNUNET_GenericReturnValue
block_plugin_setu_test_check_block (void *cls,
enum GNUNET_BLOCK_Type type,
const struct GNUNET_HashCode *query,
const void *block,
size_t block_size)
{
if ( (NULL == block) ||
(0 == block_size) ||
(0 != ((char *) block)[0]) )
return GNUNET_SYSERR;
return GNUNET_OK;
}
/**
* Function called to validate a reply to a request. Note that it is assumed
* that the reply has already been matched to the key (and signatures checked)
* as it would be done with the GetKeyFunction and the
* BlockEvaluationFunction.
*
* @param cls closure
* @param type block type
* @param group which block group to use for evaluation
* @param query original query (hash)
* @param xquery extrended query data (can be NULL, depending on type)
* @param xquery_size number of bytes in @a xquery
* @param reply_block response to validate
* @param reply_block_size number of bytes in @a reply_block
* @return characterization of result
*/
static enum GNUNET_BLOCK_ReplyEvaluationResult
block_plugin_setu_test_check_reply (void *cls,
enum GNUNET_BLOCK_Type type,
struct GNUNET_BLOCK_Group *group,
const struct GNUNET_HashCode *query,
const void *xquery,
size_t xquery_size,
const void *reply_block,
size_t reply_block_size)
{
if ( (NULL == reply_block) ||
(0 == reply_block_size) ||
(0 != ((char *) reply_block)[0]) )
return GNUNET_BLOCK_REPLY_INVALID;
return GNUNET_BLOCK_REPLY_OK_MORE;
}
/**
* Function called to obtain the key for a block.
*
* @param cls closure
* @param type block type
* @param block block to get the key for
* @param block_size number of bytes in block
* @param key set to the key (query) for the given block
* @return #GNUNET_OK on success, #GNUNET_SYSERR if type not supported
* (or if extracting a key from a block of this type does not work)
*/
static enum GNUNET_GenericReturnValue
block_plugin_setu_test_get_key (void *cls,
enum GNUNET_BLOCK_Type type,
const void *block,
size_t block_size,
struct GNUNET_HashCode *key)
{
return GNUNET_SYSERR;
}
/**
* Entry point for the plugin.
*/
void *
libgnunet_plugin_block_setu_test_init (void *cls)
{
static enum GNUNET_BLOCK_Type types[] = {
GNUNET_BLOCK_TYPE_SETU_TEST,
GNUNET_BLOCK_TYPE_ANY /* end of list */
};
struct GNUNET_BLOCK_PluginFunctions *api;
api = GNUNET_new (struct GNUNET_BLOCK_PluginFunctions);
api->evaluate = &block_plugin_setu_test_evaluate;
api->get_key = &block_plugin_setu_test_get_key;
api->check_query = &block_plugin_setu_test_check_query;
api->check_block = &block_plugin_setu_test_check_block;
api->check_reply = &block_plugin_setu_test_check_reply;
api->types = types;
return api;
}
/**
* Exit point from the plugin.
*/
void *
libgnunet_plugin_block_setu_test_done (void *cls)
{
struct GNUNET_BLOCK_PluginFunctions *api = cls;
GNUNET_free (api);
return NULL;
}
/* end of plugin_block_setu_test.c */
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