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3 (C) 2013 Christian Grothoff (and other contributing authors)
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22 * @file mesh/gnunet-service-mesh_peer.h
23 * @brief mesh service; dealing with remote peers
24 * @author Bartlomiej Polot
26 * All functions in this file should use the prefix GMP (Gnunet Mesh Peer)
29 #ifndef GNUNET_SERVICE_MESH_PEER_H
30 #define GNUNET_SERVICE_MESH_PEER_H
35 #if 0 /* keep Emacsens' auto-indent happy */
41 #include "gnunet_util_lib.h"
44 * Struct containing all information regarding a given peer
48 #include "gnunet-service-mesh_connection.h"
51 * Callback called when a queued message is sent.
54 * @param c Connection this message was on.
55 * @param type Type of message sent.
56 * @param fwd Was this a FWD going message?
57 * @param size Size of the message.
58 * @param wait Time spent waiting for core (only the time for THIS message)
60 typedef void (*GMP_sent) (void *cls,
61 struct MeshConnection *c, uint16_t type,
63 struct GNUNET_TIME_Relative wait);
65 /******************************************************************************/
66 /******************************** API ***********************************/
67 /******************************************************************************/
70 * Initialize peer subsystem.
72 * @param c Configuration.
75 GMP_init (const struct GNUNET_CONFIGURATION_Handle *c);
78 * Shut down the peer subsystem.
85 * Retrieve the MeshPeer stucture associated with the peer, create one
86 * and insert it in the appropriate structures if the peer is not known yet.
88 * @param peer_id Full identity of the peer.
90 * @return Existing or newly created peer structure.
93 GMP_get (const struct GNUNET_PeerIdentity *peer_id);
97 * Retrieve the MeshPeer stucture associated with the peer, create one
98 * and insert it in the appropriate structures if the peer is not known yet.
100 * @param peer Short identity of the peer.
102 * @return Existing or newly created peer structure.
105 GMP_get_short (const GNUNET_PEER_Id peer);
108 * Try to establish a new connection to this peer (in its tunnel).
109 * If the peer doesn't have any path to it yet, try to get one.
110 * If the peer already has some path, send a CREATE CONNECTION towards it.
112 * @param peer Peer to connect to.
115 GMP_connect (struct MeshPeer *peer);
118 * @brief Queue and pass message to core when possible.
120 * @param peer Peer towards which to queue the message.
121 * @param cls Closure (@c type dependant). It will be used by queue_send to
122 * build the message to be sent if not already prebuilt.
123 * @param type Type of the message, 0 for a raw message.
124 * @param size Size of the message.
125 * @param c Connection this message belongs to (cannot be NULL).
126 * @param fwd Is this a message going root->dest? (FWD ACK are NOT FWD!)
127 * @param cont Continuation to be called once CORE has taken the message.
128 * @param cont_cls Closure for @c cont.
131 GMP_queue_add (struct MeshPeer *peer, void *cls, uint16_t type, size_t size,
132 struct MeshConnection *c, int fwd,
133 GMP_sent cont, void *cont_cls);
136 * Cancel all queued messages to a peer that belong to a certain connection.
138 * @param peer Peer towards whom to cancel.
139 * @param c Connection whose queued messages to cancel. Might be destroyed by
140 * the sent continuation call.
143 GMP_queue_cancel (struct MeshPeer *peer, struct MeshConnection *c);
146 GMP_queue_unlock (struct MeshPeer *peer, struct MeshConnection *c);
155 GMP_set_tunnel (struct MeshPeer *peer, struct MeshTunnel3 *t);
158 * Check whether there is a direct (core level) connection to peer.
160 * @param peer Peer to check.
162 * @return GNUNET_YES if there is a direct connection.
165 GMP_is_neighbor (const struct MeshPeer *peer);
168 * Create and initialize a new tunnel towards a peer, in case it has none.
170 * Does not generate any traffic, just creates the local data structures.
172 * @param peer Peer towards which to create the tunnel.
175 GMP_add_tunnel (struct MeshPeer *peer);
178 * Add a connection to a neighboring peer.
180 * Store that the peer is the first hop of the connection in one
181 * direction and that on peer disconnect the connection must be
182 * notified and destroyed, for it will no longer be valid.
184 * @param peer Peer to add connection to.
185 * @param c Connection to add.
187 * @return GNUNET_OK on success.
190 GMP_add_connection (struct MeshPeer *peer, struct MeshConnection *c);
193 * Add the path to the peer and update the path used to reach it in case this
196 * @param peer Destination peer to add the path to.
197 * @param path New path to add. Last peer must be the peer in arg 1.
198 * Path will be either used of freed if already known.
199 * @param trusted Do we trust that this path is real?
201 * @return path if path was taken, pointer to existing duplicate if exists
204 struct MeshPeerPath *
205 GMP_add_path (struct MeshPeer *peer, struct MeshPeerPath *p, int trusted);
208 * Add the path to the origin peer and update the path used to reach it in case
209 * this is the shortest.
210 * The path is given in peer_info -> destination, therefore we turn the path
213 * @param peer Peer to add the path to, being the origin of the path.
214 * @param path New path to add after being inversed.
215 * Path will be either used or freed.
216 * @param trusted Do we trust that this path is real?
218 * @return path if path was taken, pointer to existing duplicate if exists
221 struct MeshPeerPath *
222 GMP_add_path_to_origin (struct MeshPeer *peer,
223 struct MeshPeerPath *path,
227 * Adds a path to the info of all the peers in the path
229 * @param p Path to process.
230 * @param confirmed Whether we know if the path works or not.
233 GMP_add_path_to_all (const struct MeshPeerPath *p, int confirmed);
236 * Remove a connection from a neighboring peer.
238 * @param peer Peer to remove connection from.
239 * @param c Connection to remove.
241 * @return GNUNET_OK on success.
244 GMP_remove_connection (struct MeshPeer *peer, const struct MeshConnection *c);
247 * Start the DHT search for new paths towards the peer: we don't have
248 * enough good connections.
250 * @param peer Destination peer.
253 GMP_start_search (struct MeshPeer *peer);
256 * Stop the DHT search for new paths towards the peer: we already have
257 * enough good connections.
259 * @param peer Destination peer.
262 GMP_stop_search (struct MeshPeer *peer);
265 * Get the Full ID of a peer.
267 * @param peer Peer to get from.
269 * @return Full ID of peer.
271 const struct GNUNET_PeerIdentity *
272 GMP_get_id (const struct MeshPeer *peer);
275 * Get the Short ID of a peer.
277 * @param peer Peer to get from.
279 * @return Short ID of peer.
282 GMP_get_short_id (const struct MeshPeer *peer);
285 * Get the tunnel towards a peer.
287 * @param peer Peer to get from.
289 * @return Tunnel towards peer.
292 GMP_get_tunnel (const struct MeshPeer *peer);
295 * Get the static string for a peer ID.
299 * @return Static string for it's ID.
302 GMP_2s (const struct MeshPeer *peer);
305 #if 0 /* keep Emacsens' auto-indent happy */
312 /* ifndef GNUNET_MESH_SERVICE_PEER_H */
314 /* end of gnunet-mesh-service_peer.h */