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1 files changed, 261 insertions, 0 deletions

diff --git a/src/include/gnunet_dht_service_new.h b/src/include/gnunet_dht_service_new.h
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+++ b/src/include/gnunet_dht_service_new.h
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+/*
+      This file is part of GNUnet
+      (C) 2004, 2005, 2006, 2008, 2009, 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 include/gnunet_dht_service.h
+ * @brief API to the DHT service
+ * @author Christian Grothoff
+ */
+
+#ifndef GNUNET_DHT_SERVICE_H
+#define GNUNET_DHT_SERVICE_H
+
+#include "gnunet_util_lib.h"
+#include "gnunet_block_lib.h"
+#include "gnunet_hello_lib.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#if 0                           /* keep Emacsens' auto-indent happy */
+}
+#endif
+#endif
+
+
+/**
+ * Connection to the DHT service.
+ */
+struct GNUNET_DHT_Handle;
+
+/**
+ * Handle to control a get operation.
+ */
+struct GNUNET_DHT_GetHandle;
+
+/**
+ * Handle to control a find peer operation.
+ */
+struct GNUNET_DHT_FindPeerHandle;
+
+
+/**
+ * Options for routing.
+ */
+enum GNUNET_DHT_RouteOption
+{
+    /**
+     * Default.  Do nothing special.
+     */
+  GNUNET_DHT_RO_NONE = 0,
+
+    /**
+     * Each peer along the way should look at 'enc' (otherwise
+     * only the k-peers closest to the key should look at it).
+     */
+  GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE = 1,
+
+    /**
+     * We should keep track of the route that the message
+     * took in the P2P network.
+     */
+  GNUNET_DHT_RO_RECORD_ROUTE = 2,
+
+    /**
+     * Possible message option for query key randomization.
+     */
+  GNUNET_DHT_RO_BART = 4
+};
+
+
+/**
+ * Initialize the connection with the DHT service.
+ *
+ * @param cfg configuration to use
+ * @param ht_len size of the internal hash table to use for
+ *               processing multiple GET/FIND requests in parallel
+ * @return NULL on error
+ */
+struct GNUNET_DHT_Handle *
+GNUNET_DHT_connect (const struct GNUNET_CONFIGURATION_Handle *cfg,
+                    unsigned int ht_len);
+
+
+/**
+ * Shutdown connection with the DHT service.
+ *
+ * @param handle connection to shut down
+ */
+void
+GNUNET_DHT_disconnect (struct GNUNET_DHT_Handle *handle);
+
+
+/* *************** Standard API: get and put ******************* */
+
+/**
+ * Perform a PUT operation storing data in the DHT.
+ *
+ * @param handle handle to DHT service
+ * @param key the key to store under
+ * @param desired_replication_level estimate of how many
+ *                nearest peers this request should reach
+ * @param options routing options for this message
+ * @param type type of the value
+ * @param size number of bytes in data; must be less than 64k
+ * @param data the data to store
+ * @param exp desired expiration time for the value
+ * @param timeout how long to wait for transmission of this request
+ * @param cont continuation to call when done (transmitting request to service)
+ * @param cont_cls closure for cont
+ */
+void
+GNUNET_DHT_put (struct GNUNET_DHT_Handle *handle, const GNUNET_HashCode * key,
+                uint32_t desired_replication_level,
+                enum GNUNET_DHT_RouteOption options,
+                enum GNUNET_BLOCK_Type type, size_t size, const char *data,
+                struct GNUNET_TIME_Absolute exp,
+                struct GNUNET_TIME_Relative timeout, GNUNET_SCHEDULER_Task cont,
+                void *cont_cls);
+
+
+/**
+ * Iterator called on each result obtained for a DHT
+ * operation that expects a reply
+ *
+ * @param cls closure
+ * @param exp when will this value expire
+ * @param key key of the result
+ * @param get_path NULL-terminated array of pointers
+ *                 to the peers on reverse GET path (or NULL if not recorded)
+ * @param put_path NULL-terminated array of pointers
+ *                 to the peers on the PUT path (or NULL if not recorded)
+ * @param type type of the result
+ * @param size number of bytes in data
+ * @param data pointer to the result data
+ */
+typedef void (*GNUNET_DHT_GetIterator) (void *cls,
+                                        struct GNUNET_TIME_Absolute exp,
+                                        const GNUNET_HashCode * key,
+                                        const struct GNUNET_PeerIdentity *
+                                        const *get_path,
+                                        const struct GNUNET_PeerIdentity *
+                                        const *put_path,
+                                        enum GNUNET_BLOCK_Type type,
+                                        size_t size, const void *data);
+
+
+
+/**
+ * Perform an asynchronous GET operation on the DHT identified. See
+ * also "GNUNET_BLOCK_evaluate".
+ *
+ * @param handle handle to the DHT service
+ * @param timeout how long to wait for transmission of this request to the service
+ * @param type expected type of the response object
+ * @param key the key to look up
+ * @param desired_replication_level estimate of how many
+                  nearest peers this request should reach
+ * @param options routing options for this message
+ * @param bf bloom filter associated with query (can be NULL)
+ * @param bf_mutator mutation value for bf
+ * @param xquery extended query data (can be NULL, depending on type)
+ * @param xquery_size number of bytes in xquery
+ * @param iter function to call on each result
+ * @param iter_cls closure for iter
+ *
+ * @return handle to stop the async get
+ */
+struct GNUNET_DHT_GetHandle *
+GNUNET_DHT_get_start (struct GNUNET_DHT_Handle *handle,
+                      struct GNUNET_TIME_Relative timeout,
+                      enum GNUNET_BLOCK_Type type, const GNUNET_HashCode * key,
+                      uint32_t desired_replication_level,
+                      enum GNUNET_DHT_RouteOption options,
+                      const struct GNUNET_CONTAINER_BloomFilter *bf,
+                      int32_t bf_mutator, const void *xquery,
+                      size_t xquery_size, GNUNET_DHT_GetIterator iter,
+                      void *iter_cls);
+
+
+/**
+ * Stop async DHT-get.  Frees associated resources.
+ *
+ * @param get_handle GET operation to stop.
+ *
+ * On return get_handle will no longer be valid, caller
+ * must not use again!!!
+ */
+void
+GNUNET_DHT_get_stop (struct GNUNET_DHT_GetHandle *get_handle);
+
+
+/* ******** Special high-level API for finding peers *********** */
+
+/**
+ * Iterator called on each result obtained from a find peer
+ * operation
+ *
+ * @param cls closure
+ * @param peer hello of a target (peer near key)
+ */
+typedef void (*GNUNET_DHT_FindPeerProcessor) (void *cls,
+                                              const struct GNUNET_HELLO_Message
+                                              * peer);
+
+
+/**
+ * Perform an asynchronous FIND PEER operation on the DHT.
+ *
+ * @param handle handle to the DHT service
+ * @param timeout timeout for this request to be sent to the
+ *        service
+ * @param key the key to look up
+ * @param options routing options for this message
+ * @param proc function to call on each result
+ * @param proc_cls closure for proc
+ * @return handle to stop the async get, NULL on error
+ */
+struct GNUNET_DHT_FindPeerHandle *
+GNUNET_DHT_find_peer_start (struct GNUNET_DHT_Handle *handle,
+                            struct GNUNET_TIME_Relative timeout,
+                            const GNUNET_HashCode * key,
+                            enum GNUNET_DHT_RouteOption options,
+                            GNUNET_DHT_FindPeerProcessor proc, void *proc_cls);
+
+
+/**
+ * Stop async find peer.  Frees associated resources.
+ *
+ * @param find_peer_handle GET operation to stop.
+ */
+void
+GNUNET_DHT_find_peer_stop (struct GNUNET_DHT_FindPeerHandle *find_peer_handle);
+
+
+#if 0                           /* keep Emacsens' auto-indent happy */
+{
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif
+/* gnunet_dht_service.h */