From a3882b58f1c5976677aa65b0af8a48e8e946b06e Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Mon, 20 Feb 2017 15:09:00 +0100
Subject: first half of new BLOCK API to generalize duplicate detection beyond
 BFs

---
 src/dht/plugin_block_dht.c | 36 +++++++++++++++++++++++++++++++++++-
 1 file changed, 35 insertions(+), 1 deletion(-)

(limited to 'src/dht/plugin_block_dht.c')

diff --git a/src/dht/plugin_block_dht.c b/src/dht/plugin_block_dht.c
index 4256a0fe6..4c5f122a4 100644
--- a/src/dht/plugin_block_dht.c
+++ b/src/dht/plugin_block_dht.c
@@ -25,14 +25,47 @@
  *        DHT (see fs block plugin)
  * @author Christian Grothoff
  */
-
 #include "platform.h"
 #include "gnunet_constants.h"
 #include "gnunet_hello_lib.h"
 #include "gnunet_block_plugin.h"
+#include "gnunet_block_group_lib.h"
 
 #define DEBUG_DHT GNUNET_EXTRA_LOGGING
 
+/**
+ * How big is the BF we use for DHT blocks?
+ */
+#define DHT_BF_SIZE 8
+
+
+/**
+ * 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
+ * @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_dht_create_group (void *cls,
+                               enum GNUNET_BLOCK_Type type,
+                               uint32_t nonce,
+                               const void *raw_data,
+                               size_t raw_data_size)
+{
+  return GNUNET_BLOCK_GROUP_bf_create (cls,
+                                       DHT_BF_SIZE,
+                                       GNUNET_CONSTANTS_BLOOMFILTER_K,
+                                       type,
+                                       nonce,
+                                       raw_data,
+                                       raw_data_size);
+}
+
 
 /**
  * Function called to validate a reply or a request.  For
@@ -182,6 +215,7 @@ libgnunet_plugin_block_dht_init (void *cls)
   api = GNUNET_new (struct GNUNET_BLOCK_PluginFunctions);
   api->evaluate = &block_plugin_dht_evaluate;
   api->get_key = &block_plugin_dht_get_key;
+  api->create_group = &block_plugin_dht_create_group;
   api->types = types;
   return api;
 }
-- 
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