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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
49 * Struct containing info about a queued transmission to this peer
53 #include "gnunet-service-mesh_connection.h"
56 * Callback called when a queued message is sent.
59 * @param c Connection this message was on.
60 * @param type Type of message sent.
61 * @param fwd Was this a FWD going message?
62 * @param size Size of the message.
63 * @param wait Time spent waiting for core (only the time for THIS message)
65 typedef void (*GMP_sent) (void *cls,
66 struct MeshConnection *c, uint16_t type,
68 struct GNUNET_TIME_Relative wait);
70 /******************************************************************************/
71 /******************************** API ***********************************/
72 /******************************************************************************/
75 * Initialize peer subsystem.
77 * @param c Configuration.
80 GMP_init (const struct GNUNET_CONFIGURATION_Handle *c);
83 * Shut down the peer subsystem.
90 * Retrieve the MeshPeer stucture associated with the peer, create one
91 * and insert it in the appropriate structures if the peer is not known yet.
93 * @param peer_id Full identity of the peer.
95 * @return Existing or newly created peer structure.
98 GMP_get (const struct GNUNET_PeerIdentity *peer_id);
102 * Retrieve the MeshPeer stucture associated with the peer, create one
103 * and insert it in the appropriate structures if the peer is not known yet.
105 * @param peer Short identity of the peer.
107 * @return Existing or newly created peer structure.
110 GMP_get_short (const GNUNET_PEER_Id peer);
113 * Try to establish a new connection to this peer (in its tunnel).
114 * If the peer doesn't have any path to it yet, try to get one.
115 * If the peer already has some path, send a CREATE CONNECTION towards it.
117 * @param peer Peer to connect to.
120 GMP_connect (struct MeshPeer *peer);
123 * Free a transmission that was already queued with all resources
124 * associated to the request.
126 * @param queue Queue handler to cancel.
127 * @param clear_cls Is it necessary to free associated cls?
130 GMP_queue_destroy (struct MeshPeerQueue *queue, int clear_cls);
133 * @brief Queue and pass message to core when possible.
135 * @param peer Peer towards which to queue the message.
136 * @param cls Closure (@c type dependant). It will be used by queue_send to
137 * build the message to be sent if not already prebuilt.
138 * @param type Type of the message, 0 for a raw message.
139 * @param size Size of the message.
140 * @param c Connection this message belongs to (cannot be NULL).
141 * @param fwd Is this a message going root->dest? (FWD ACK are NOT FWD!)
142 * @param cont Continuation to be called once CORE has taken the message.
143 * @param cont_cls Closure for @c cont.
145 * @return Handle to cancel the message before it is sent. Once cont is called
146 * message has been sent and therefore the handle is no longer valid.
148 struct MeshPeerQueue *
149 GMP_queue_add (struct MeshPeer *peer, void *cls, uint16_t type, size_t size,
150 struct MeshConnection *c, int fwd,
151 GMP_sent cont, void *cont_cls);
154 * Cancel all queued messages to a peer that belong to a certain connection.
156 * @param peer Peer towards whom to cancel.
157 * @param c Connection whose queued messages to cancel. Might be destroyed by
158 * the sent continuation call.
161 GMP_queue_cancel (struct MeshPeer *peer, struct MeshConnection *c);
164 GMP_queue_unlock (struct MeshPeer *peer, struct MeshConnection *c);
173 GMP_set_tunnel (struct MeshPeer *peer, struct MeshTunnel3 *t);
176 * Check whether there is a direct (core level) connection to peer.
178 * @param peer Peer to check.
180 * @return #GNUNET_YES if there is a direct connection.
183 GMP_is_neighbor (const struct MeshPeer *peer);
186 * Create and initialize a new tunnel towards a peer, in case it has none.
188 * Does not generate any traffic, just creates the local data structures.
190 * @param peer Peer towards which to create the tunnel.
193 GMP_add_tunnel (struct MeshPeer *peer);
196 * Add a connection to a neighboring peer.
198 * Store that the peer is the first hop of the connection in one
199 * direction and that on peer disconnect the connection must be
200 * notified and destroyed, for it will no longer be valid.
202 * @param peer Peer to add connection to.
203 * @param c Connection to add.
205 * @return GNUNET_OK on success.
208 GMP_add_connection (struct MeshPeer *peer, struct MeshConnection *c);
211 * Add the path to the peer and update the path used to reach it in case this
214 * @param peer Destination peer to add the path to.
215 * @param path New path to add. Last peer must be the peer in arg 1.
216 * Path will be either used of freed if already known.
217 * @param trusted Do we trust that this path is real?
219 * @return path if path was taken, pointer to existing duplicate if exists
222 struct MeshPeerPath *
223 GMP_add_path (struct MeshPeer *peer, struct MeshPeerPath *p, int trusted);
226 * Add the path to the origin peer and update the path used to reach it in case
227 * this is the shortest.
228 * The path is given in peer_info -> destination, therefore we turn the path
231 * @param peer Peer to add the path to, being the origin of the path.
232 * @param path New path to add after being inversed.
233 * Path will be either used or freed.
234 * @param trusted Do we trust that this path is real?
236 * @return path if path was taken, pointer to existing duplicate if exists
239 struct MeshPeerPath *
240 GMP_add_path_to_origin (struct MeshPeer *peer,
241 struct MeshPeerPath *path,
245 * Adds a path to the info of all the peers in the path
247 * @param p Path to process.
248 * @param confirmed Whether we know if the path works or not.
251 GMP_add_path_to_all (const struct MeshPeerPath *p, int confirmed);
254 * Remove any path to the peer that has the extact same peers as the one given.
256 * @param peer Peer to remove the path from.
257 * @param path Path to remove. Is always destroyed .
260 GMP_remove_path (struct MeshPeer *peer, struct MeshPeerPath *path);
263 * Remove a connection from a neighboring peer.
265 * @param peer Peer to remove connection from.
266 * @param c Connection to remove.
268 * @return GNUNET_OK on success.
271 GMP_remove_connection (struct MeshPeer *peer, const struct MeshConnection *c);
274 * Start the DHT search for new paths towards the peer: we don't have
275 * enough good connections.
277 * @param peer Destination peer.
280 GMP_start_search (struct MeshPeer *peer);
283 * Stop the DHT search for new paths towards the peer: we already have
284 * enough good connections.
286 * @param peer Destination peer.
289 GMP_stop_search (struct MeshPeer *peer);
292 * Get the Full ID of a peer.
294 * @param peer Peer to get from.
296 * @return Full ID of peer.
298 const struct GNUNET_PeerIdentity *
299 GMP_get_id (const struct MeshPeer *peer);
302 * Get the Short ID of a peer.
304 * @param peer Peer to get from.
306 * @return Short ID of peer.
309 GMP_get_short_id (const struct MeshPeer *peer);
312 * Get the tunnel towards a peer.
314 * @param peer Peer to get from.
316 * @return Tunnel towards peer.
319 GMP_get_tunnel (const struct MeshPeer *peer);
322 * Set the hello message.
324 * @param peer Peer whose message to set.
325 * @param hello Hello message.
328 GMP_set_hello (struct MeshPeer *peer, const struct GNUNET_HELLO_Message *hello);
331 * Get the hello message.
333 * @param peer Peer whose message to get.
335 * @return Hello message.
337 struct GNUNET_HELLO_Message *
338 GMP_get_hello (struct MeshPeer *peer);
342 * Try to connect to a peer on TRANSPORT level.
344 * @param peer Peer to whom to connect.
347 GMP_try_connect (struct MeshPeer *peer);
350 * Count the number of known paths toward the peer.
352 * @param peer Peer to get path info.
354 * @return Number of known paths.
357 GMP_count_paths (const struct MeshPeer *peer);
360 * Iterate all known peers.
362 * @param iter Iterator.
363 * @param cls Closure for @c iter.
366 GMP_iterate_all (GNUNET_CONTAINER_PeerMapIterator iter, void *cls);
369 * Get the static string for a peer ID.
373 * @return Static string for it's ID.
376 GMP_2s (const struct MeshPeer *peer);
379 #if 0 /* keep Emacsens' auto-indent happy */
386 /* ifndef GNUNET_MESH_SERVICE_PEER_H */
388 /* end of gnunet-mesh-service_peer.h */