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+/*
+ This file is part of GNUnet.
+ (C) 2009, 2010, 2011 Christian Grothoff (and other contributing authors)
+
+ GNUnet is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3, 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file dht/gnunet-service-dht_neighbours.h
+ * @brief GNUnet DHT routing code
+ * @author Christian Grothoff
+ * @author Nathan Evans
+ */
+#ifndef GNUNET_SERVICE_DHT_NEIGHBOURS_H
+#define GNUNET_SERVICE_DHT_NEIGHBOURS_H
+
+#include "gnunet_util_lib.h"
+#include "gnunet_block_lib.h"
+#include "gnunet_dht_service.h"
+
+/**
+ * Perform a PUT operation. Forwards the given request to other
+ * peers. Does not store the data locally. Does not give the
+ * data to local clients. May do nothing if this is the only
+ * peer in the network (or if we are the closest peer in the
+ * network).
+ *
+ * @param type type of the block
+ * @param options routing options
+ * @param desired_replication_level desired replication level
+ * @param expiration_time when does the content expire
+ * @param hop_count how many hops has this message traversed so far
+ * @param bf Bloom filter of peers this PUT has already traversed
+ * @param key key for the content
+ * @param put_path_length number of entries in put_path
+ * @param put_path peers this request has traversed so far (if tracked)
+ * @param data payload to store
+ * @param data_size number of bytes in data
+ */
+void
+GDS_NEIGHBOURS_handle_put (enum GNUNET_BLOCK_Type type,
+ enum GNUNET_DHT_RouteOption options,
+ uint32_t desired_replication_level,
+ struct GNUNET_TIME_Absolute expiration_time,
+ uint32_t hop_count,
+ struct GNUNET_CONTAINER_BloomFilter *bf,
+ const GNUNET_HashCode * key,
+ unsigned int put_path_length,
+ struct GNUNET_PeerIdentity *put_path,
+ const void *data, size_t data_size);
+
+
+/**
+ * Perform a GET operation. Forwards the given request to other
+ * peers. Does not lookup the key locally. May do nothing if this is
+ * the only peer in the network (or if we are the closest peer in the
+ * network).
+ *
+ * @param type type of the block
+ * @param options routing options
+ * @param desired_replication_level desired replication count
+ * @param hop_count how many hops did this request traverse so far?
+ * @param key key for the content
+ * @param xquery extended query
+ * @param xquery_size number of bytes in xquery
+ * @param reply_bf bloomfilter to filter duplicates
+ * @param reply_bf_mutator mutator for reply_bf
+ * @param peer_bf filter for peers not to select (again, updated)
+ */
+void
+GDS_NEIGHBOURS_handle_get (enum GNUNET_BLOCK_Type type,
+ enum GNUNET_DHT_RouteOption options,
+ uint32_t desired_replication_level,
+ uint32_t hop_count, const GNUNET_HashCode * key,
+ const void *xquery, size_t xquery_size,
+ const struct GNUNET_CONTAINER_BloomFilter *reply_bf,
+ uint32_t reply_bf_mutator,
+ struct GNUNET_CONTAINER_BloomFilter *peer_bf);
+
+
+/**
+ * Handle a reply (route to origin). Only forwards the reply back to
+ * other peers waiting for it. Does not do local caching or
+ * forwarding to local clients.
+ *
+ * @param target neighbour that should receive the block (if still connected)
+ * @param type type of the block
+ * @param expiration_time when does the content expire
+ * @param key key for the content
+ * @param put_path_length number of entries in put_path
+ * @param put_path peers the original PUT traversed (if tracked)
+ * @param get_path_length number of entries in put_path
+ * @param get_path peers this reply has traversed so far (if tracked)
+ * @param data payload of the reply
+ * @param data_size number of bytes in data
+ */
+void
+GDS_NEIGHBOURS_handle_reply (const struct GNUNET_PeerIdentity *target,
+ enum GNUNET_BLOCK_Type type,
+ struct GNUNET_TIME_Absolute expiration_time,
+ const GNUNET_HashCode * key,
+ unsigned int put_path_length,
+ const struct GNUNET_PeerIdentity *put_path,
+ unsigned int get_path_length,
+ const struct GNUNET_PeerIdentity *get_path,
+ const void *data, size_t data_size);
+
+
+/**
+ * Initialize neighbours subsystem.
+ *
+ * @return GNUNET_OK on success, GNUNET_SYSERR on error
+ */
+int
+GDS_NEIGHBOURS_init (void);
+
+
+/**
+ * Shutdown neighbours subsystem.
+ */
+void
+GDS_NEIGHBOURS_done (void);
+
+
+#endif