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22 * @file include/gnunet_gns_service.h
23 * @brief API to the GNS service
24 * @author Martin Schanzenbach
27 #ifndef GNUNET_GNS_SERVICE_H
28 #define GNUNET_GNS_SERVICE_H
30 #include "gnunet_util_lib.h"
35 #if 0 /* keep Emacsens' auto-indent happy */
42 * Connection to the GNS service.
44 struct GNUNET_GNS_Handle;
47 * Handle to control a get operation.
49 struct GNUNET_GNS_LookupHandle;
52 * Initialize the connection with the GNS service.
54 * @param cfg configuration to use
55 * @return NULL on error
57 struct GNUNET_GNS_Handle *
58 GNUNET_GNS_connect (const struct GNUNET_CONFIGURATION_Handle *cfg);
62 * Shutdown connection with the GNS service.
64 * @param handle connection to shut down
67 GNUNET_GNS_disconnect (struct GNUNET_GNS_Handle *handle);
70 /* *************** Standard API: add and lookup ******************* */
73 * Perform an add operation storing records in the GNS.
75 * @param handle handle to GNS service
76 * @param key the key to store under
77 * @param desired_replication_level estimate of how many
78 * nearest peers this request should reach
79 * @param options routing options for this message
80 * @param type type of the value
81 * @param size number of bytes in data; must be less than 64k
82 * @param data the data to store
83 * @param exp desired expiration time for the value
84 * @param timeout how long to wait for transmission of this request
85 * @param cont continuation to call when done (transmitting request to service)
86 * @param cont_cls closure for cont
89 GNUNET_GNS_add (struct GNUNET_GNS_Handle *handle, const GNUNET_HashCode * key,
90 uint32_t desired_replication_level,
91 enum GNUNET_DHT_RouteOption options,
92 enum GNUNET_BLOCK_Type type, size_t size, const char *data,
93 struct GNUNET_TIME_Absolute exp,
94 struct GNUNET_TIME_Relative timeout, GNUNET_SCHEDULER_Task cont,
99 * Iterator called on each result obtained for a GNS
100 * operation that expects a reply TODO: eh?
103 * @param exp when will this value expire
104 * @param key key of the result
105 * @param get_path peers on reply path (or NULL if not recorded)
106 * @param get_path_length number of entries in get_path
107 * @param put_path peers on the PUT path (or NULL if not recorded)
108 * @param put_path_length number of entries in get_path
109 * @param type type of the result
110 * @param size number of bytes in data
111 * @param data pointer to the result data
113 typedef void (*GNUNET_GNS_LookupIterator) (void *cls,
114 struct GNUNET_TIME_Absolute exp,
115 const GNUNET_HashCode * key,
116 const struct GNUNET_PeerIdentity *
117 get_path, unsigned int get_path_length,
118 const struct GNUNET_PeerIdentity *
119 put_path, unsigned int put_path_length,
120 enum GNUNET_BLOCK_Type type,
121 size_t size, const void *data);
126 * Perform an asynchronous lookup operation on the GNS.
128 * @param handle handle to the GNS service
129 * @param timeout how long to wait for transmission of this request to the service
130 * @param type expected type of the response object
131 * @param key the key to look up
132 * @param desired_replication_level estimate of how many
133 nearest peers this request should reach
134 * @param options routing options for this message
135 * @param xquery extended query data (can be NULL, depending on type)
136 * @param xquery_size number of bytes in xquery
137 * @param iter function to call on each result
138 * @param iter_cls closure for iter
140 * @return handle to stop the async get
142 struct GNUNET_GNS_LookupHandle *
143 GNUNET_GNS_lookup_start (struct GNUNET_GNS_Handle *handle,
144 struct GNUNET_TIME_Relative timeout,
145 enum GNUNET_BLOCK_Type type, const GNUNET_HashCode * key,
146 uint32_t desired_replication_level,
147 enum GNUNET_DHT_RouteOption options, const void *xquery,
148 size_t xquery_size, GNUNET_GNS_LookupIterator iter,
153 * Stop async GNS lookup. Frees associated resources.
155 * @param lookup_handle lookup operation to stop.
157 * On return lookup_handle will no longer be valid, caller
158 * must not use again!!!
161 GNUNET_GNS_lookup_stop (struct GNUNET_GNS_LookupHandle *lookup_handle);
164 #if 0 /* keep Emacsens' auto-indent happy */
173 /* gnunet_gns_service.h */