/*
This file is part of GNUnet
- Copyright (C) 2013 GNUnet e.V.
+ Copyright (C) 2013, 2017 GNUnet e.V.
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
#include "gnunet_block_plugin.h"
#include "block_dns.h"
#include "gnunet_signatures.h"
+#include "gnunet_block_group_lib.h"
+
+
+/**
+ * Number of bits we set per entry in the bloomfilter.
+ * Do not change!
+ */
+#define BLOOMFILTER_K 16
+
+
+/**
+ * Create a new block group.
+ *
+ * @param ctx block context in which the block group is created
+ * @param type type of the block for which we are creating the group
+ * @param nonce random value used to seed the group creation
+ * @param raw_data optional serialized prior state of the group, NULL if unavailable/fresh
+ * @param raw_data_size number of bytes in @a raw_data, 0 if unavailable/fresh
+ * @param va variable arguments specific to @a type
+ * @return block group handle, NULL if block groups are not supported
+ * by this @a type of block (this is not an error)
+ */
+static struct GNUNET_BLOCK_Group *
+block_plugin_dns_create_group (void *cls,
+ enum GNUNET_BLOCK_Type type,
+ uint32_t nonce,
+ const void *raw_data,
+ size_t raw_data_size,
+ va_list va)
+{
+ unsigned int bf_size;
+ const char *guard;
+
+ guard = va_arg (va, const char *);
+ if (0 == strcmp (guard,
+ "seen-set-size"))
+ bf_size = GNUNET_BLOCK_GROUP_compute_bloomfilter_size (va_arg (va, unsigned int),
+ BLOOMFILTER_K);
+ else if (0 == strcmp (guard,
+ "filter-size"))
+ bf_size = va_arg (va, unsigned int);
+ else
+ {
+ GNUNET_break (0);
+ bf_size = 8;
+ }
+ GNUNET_break (NULL == va_arg (va, const char *));
+ return GNUNET_BLOCK_GROUP_bf_create (cls,
+ bf_size,
+ BLOOMFILTER_K,
+ type,
+ nonce,
+ raw_data,
+ raw_data_size);
+}
/**
* request evaluation, simply pass "NULL" for the reply_block.
*
* @param cls closure
+ * @param ctx block context
* @param type block type
* @param bg group to evaluate against
* @param eo control flags
*/
static enum GNUNET_BLOCK_EvaluationResult
block_plugin_dns_evaluate (void *cls,
+ struct GNUNET_BLOCK_Context *ctx,
enum GNUNET_BLOCK_Type type,
struct GNUNET_BLOCK_Group *bg,
enum GNUNET_BLOCK_EvaluationOptions eo,
size_t reply_block_size)
{
const struct GNUNET_DNS_Advertisement *ad;
+ struct GNUNET_HashCode phash;
switch (type)
{
GNUNET_break_op (0);
return GNUNET_BLOCK_EVALUATION_RESULT_INVALID;
}
+ GNUNET_CRYPTO_hash (reply_block,
+ reply_block_size,
+ &phash);
+ if (GNUNET_YES ==
+ GNUNET_BLOCK_GROUP_bf_test_and_set (bg,
+ &phash))
+ return GNUNET_BLOCK_EVALUATION_OK_DUPLICATE;
return GNUNET_BLOCK_EVALUATION_OK_MORE;
default:
return GNUNET_BLOCK_EVALUATION_TYPE_NOT_SUPPORTED;
api = GNUNET_new (struct GNUNET_BLOCK_PluginFunctions);
api->evaluate = &block_plugin_dns_evaluate;
api->get_key = &block_plugin_dns_get_key;
+ api->create_group = &block_plugin_dns_create_group;
api->types = types;
return api;
}