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22 * @file dht/gnunet-service-dht_neighbours.h
23 * @brief GNUnet DHT routing code
24 * @author Christian Grothoff
25 * @author Nathan Evans
27 #ifndef GNUNET_SERVICE_DHT_NEIGHBOURS_H
28 #define GNUNET_SERVICE_DHT_NEIGHBOURS_H
30 #include "gnunet_util_lib.h"
31 #include "gnunet_block_lib.h"
32 #include "gnunet_dht_service.h"
35 * Perform a PUT operation. Forwards the given request to other
36 * peers. Does not store the data locally. Does not give the
37 * data to local clients. May do nothing if this is the only
38 * peer in the network (or if we are the closest peer in the
41 * @param type type of the block
42 * @param options routing options
43 * @param desired_replication_level desired replication level
44 * @param expiration_time when does the content expire
45 * @param hop_count how many hops has this message traversed so far
46 * @param bf Bloom filter of peers this PUT has already traversed
47 * @param key key for the content
48 * @param put_path_length number of entries in put_path
49 * @param put_path peers this request has traversed so far (if tracked)
50 * @param data payload to store
51 * @param data_size number of bytes in data
52 * @return #GNUNET_OK if the request was forwarded, #GNUNET_NO if not
55 GDS_NEIGHBOURS_handle_put (enum GNUNET_BLOCK_Type type,
56 enum GNUNET_DHT_RouteOption options,
57 uint32_t desired_replication_level,
58 struct GNUNET_TIME_Absolute expiration_time,
60 struct GNUNET_CONTAINER_BloomFilter *bf,
61 const struct GNUNET_HashCode *key,
62 unsigned int put_path_length,
63 struct GNUNET_PeerIdentity *put_path,
64 const void *data, size_t data_size);
68 * Perform a GET operation. Forwards the given request to other
69 * peers. Does not lookup the key locally. May do nothing if this is
70 * the only peer in the network (or if we are the closest peer in the
73 * @param type type of the block
74 * @param options routing options
75 * @param desired_replication_level desired replication count
76 * @param hop_count how many hops did this request traverse so far?
77 * @param key key for the content
78 * @param xquery extended query
79 * @param xquery_size number of bytes in @a xquery
80 * @param bg block group to filter replies
81 * @param peer_bf filter for peers not to select (again, updated)
82 * @return #GNUNET_OK if the request was forwarded, #GNUNET_NO if not
85 GDS_NEIGHBOURS_handle_get (enum GNUNET_BLOCK_Type type,
86 enum GNUNET_DHT_RouteOption options,
87 uint32_t desired_replication_level,
89 const struct GNUNET_HashCode *key,
92 struct GNUNET_BLOCK_Group *bg,
93 struct GNUNET_CONTAINER_BloomFilter *peer_bf);
97 * Handle a reply (route to origin). Only forwards the reply back to
98 * other peers waiting for it. Does not do local caching or
99 * forwarding to local clients.
101 * @param target neighbour that should receive the block (if still connected)
102 * @param type type of the block
103 * @param expiration_time when does the content expire
104 * @param key key for the content
105 * @param put_path_length number of entries in put_path
106 * @param put_path peers the original PUT traversed (if tracked)
107 * @param get_path_length number of entries in put_path
108 * @param get_path peers this reply has traversed so far (if tracked)
109 * @param data payload of the reply
110 * @param data_size number of bytes in data
113 GDS_NEIGHBOURS_handle_reply (const struct GNUNET_PeerIdentity *target,
114 enum GNUNET_BLOCK_Type type,
115 struct GNUNET_TIME_Absolute expiration_time,
116 const struct GNUNET_HashCode *key,
117 unsigned int put_path_length,
118 const struct GNUNET_PeerIdentity *put_path,
119 unsigned int get_path_length,
120 const struct GNUNET_PeerIdentity *get_path,
126 * Initialize neighbours subsystem.
128 * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
131 GDS_NEIGHBOURS_init (void);
135 * Shutdown neighbours subsystem.
138 GDS_NEIGHBOURS_done (void);
142 * Get the ID of the local node.
144 * @return identity of the local node
146 struct GNUNET_PeerIdentity *
147 GDS_NEIGHBOURS_get_id (void);