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18 SPDX-License-Identifier: AGPL3.0-or-later
22 * @author Julius Bünger
25 * API to the rps service
27 * @defgroup rps RPS service
28 * Random Peer Sampling
31 #ifndef GNUNET_RPS_SERVICE_H
32 #define GNUNET_RPS_SERVICE_H
37 #if 0 /* keep Emacsens' auto-indent happy */
43 * Version of the rps API.
45 #define GNUNET_RPS_VERSION 0x00000000
48 * Handle for the random peer sampling service
50 struct GNUNET_RPS_Handle;
53 * Handle for one request to the rps service
55 struct GNUNET_RPS_Request_Handle;
58 * Callback called when requested random peers are available.
60 * @param cls the closure given with the request
61 * @param num_peers the number of peers returned
62 * @param peers array with num_peers PeerIDs
64 typedef void (*GNUNET_RPS_NotifyReadyCB) (void *cls,
67 GNUNET_PeerIdentity *peers);
71 * Callback called when requested random peer with additional information is
74 * @param cls the closure given with the request
75 * @param peer The Peer ID
76 * @param probability The probability with which all elements have been observed
77 * @param num_observed Number of IDs this sampler has observed
79 typedef void (*GNUNET_RPS_NotifyReadySingleInfoCB) (void *cls,
81 GNUNET_PeerIdentity *peer,
83 uint32_t num_observed);
87 * Connect to the rps service
89 * @param cfg configuration to use
90 * @return handle to the rps service
92 struct GNUNET_RPS_Handle *
93 GNUNET_RPS_connect (const struct GNUNET_CONFIGURATION_Handle *cfg);
97 * @brief Start a sub with the given shared value
99 * @param h Handle to rps
100 * @param shared_value The shared value that defines the members of the sub (-group)
103 GNUNET_RPS_sub_start (struct GNUNET_RPS_Handle *h,
104 const char *shared_value);
108 * @brief Stop a sub with the given shared value
110 * @param h Handle to rps
111 * @param shared_value The shared value that defines the members of the sub (-group)
114 GNUNET_RPS_sub_stop (struct GNUNET_RPS_Handle *h,
115 const char *shared_value);
119 * Request n random peers.
121 * This does exacly the same as GNUNET_RPS_request_peers_single_call
122 * but needs a GNUNET_RPS_Handle.
123 * This exists only for other parts of GNUnet that expect having to
124 * (dis)connect from/to a service.
126 * @param h handle to the rps service
127 * @param n number of random peers to return
128 * @param ready_cb the callback to be called when the peers are available
129 * @param cls a closure that will be given to the callback
130 * @return handle to this request
132 struct GNUNET_RPS_Request_Handle *
133 GNUNET_RPS_request_peers (struct GNUNET_RPS_Handle *h, uint32_t n,
134 GNUNET_RPS_NotifyReadyCB ready_cb,
139 * Request one random peer, getting additional information.
141 * @param rps_handle handle to the rps service
142 * @param ready_cb the callback called when the peers are available
143 * @param cls closure given to the callback
144 * @return a handle to cancel this request
146 struct GNUNET_RPS_Request_Handle_Single_Info *
147 GNUNET_RPS_request_peer_info (struct GNUNET_RPS_Handle *rps_handle,
148 GNUNET_RPS_NotifyReadySingleInfoCB ready_cb,
153 * Seed rps service with peerIDs.
155 * @param h handle to the rps service
156 * @param n number of peers to seed
157 * @param ids the ids of the peers seeded
160 GNUNET_RPS_seed_ids (struct GNUNET_RPS_Handle *h, uint32_t n,
161 const struct GNUNET_PeerIdentity *ids);
164 * Cancle an issued request.
166 * @param rh handle of the pending request to be canceled
169 GNUNET_RPS_request_cancel (struct GNUNET_RPS_Request_Handle *rh);
173 * Cancle an issued single info request.
175 * @param rhs request handle of request to cancle
178 GNUNET_RPS_request_single_info_cancel (
179 struct GNUNET_RPS_Request_Handle_Single_Info *rhs);
184 * Turn RPS service to act malicious.
186 * @param h handle to the rps service
187 * @param type which type of malicious peer to turn to.
188 * 0 Don't act malicious at all
189 * 1 Try to maximise representation
190 * 2 Try to partition the network
191 * (isolate one peer from the rest)
192 * @param n number of @a ids
193 * @param ids the ids of the malicious peers
194 * if @type is 2 the last id is the id of the
195 * peer to be isolated from the rest
198 GNUNET_RPS_act_malicious (struct GNUNET_RPS_Handle *h,
201 const struct GNUNET_PeerIdentity *ids,
202 const struct GNUNET_PeerIdentity *target_peer);
204 #endif /* ENABLE_MALICIOUS */
206 /* Get internals for debugging/profiling purposes */
209 * Request updates of view
211 * @param rps_handle handle to the rps service
212 * @param num_req_peers number of peers we want to receive
213 * (0 for infinite updates)
214 * @param cls a closure that will be given to the callback
215 * @param ready_cb the callback called when the peers are available
218 GNUNET_RPS_view_request (struct GNUNET_RPS_Handle *rps_handle,
219 uint32_t num_updates,
220 GNUNET_RPS_NotifyReadyCB view_update_cb,
225 * Request biased stream of peers that are being put into the sampler
227 * @param rps_handle handle to the rps service
228 * @param cls a closure that will be given to the callback
229 * @param ready_cb the callback called when the peers are available
231 struct GNUNET_RPS_StreamRequestHandle *
232 GNUNET_RPS_stream_request (struct GNUNET_RPS_Handle *rps_handle,
233 GNUNET_RPS_NotifyReadyCB stream_input_cb,
238 * @brief Cancel a specific request for updates from the biased peer stream
240 * @param srh The request handle to cancel
243 GNUNET_RPS_stream_cancel (struct GNUNET_RPS_StreamRequestHandle *srh);
247 * Disconnect from the rps service
249 * @param h the handle to the rps service
252 GNUNET_RPS_disconnect (struct GNUNET_RPS_Handle *h);
255 #if 0 /* keep Emacsens' auto-indent happy */
264 /** @} */ /* end of group */