2 This file is part of GNUnet.
3 (C) 2013 Christian Grothoff (and other contributing authors)
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13 General Public License for more details.
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22 * @file mesh/gnunet-service-mesh_connection.h
23 * @brief mesh service; dealing with connections
24 * @author Bartlomiej Polot
26 * All functions in this file should use the prefix GMC (Gnunet Mesh Connection)
29 #ifndef GNUNET_SERVICE_MESH_CONNECTION_H
30 #define GNUNET_SERVICE_MESH_CONNECTION_H
35 #if 0 /* keep Emacsens' auto-indent happy */
40 #include "gnunet_util_lib.h"
43 struct MeshConnection;
46 * Initialize the connections subsystem
48 * @param c Configuration handle.
51 GMC_init (struct GNUNET_CONFIGURATION_Handle *c);
54 * Create a connection.
56 * @param cid Connection ID.
58 struct MeshConnection *
59 GMC_new (const struct GNUNET_HashCode *cid);
62 * Connection is no longer needed: destroy it and remove from tunnel.
64 * @param c Connection to destroy.
67 GMC_destroy (struct MeshConnection *c);
70 * Count connections in a DLL.
73 GMC_count (const struct MeshConnection *head);
76 * Send FWD keepalive packets for a connection.
78 * @param cls Closure (connection for which to send the keepalive).
79 * @param tc Notification context.
82 GMC_fwd_keepalive (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
85 * Send BCK keepalive packets for a connection.
87 * @param cls Closure (connection for which to send the keepalive).
88 * @param tc Notification context.
91 GMC_bck_keepalive (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
95 * Change the tunnel state.
97 * @param c Connection whose state to change.
98 * @param state New state.
101 GMC_change_state (struct MeshConnection* c, enum MeshConnectionState state);
104 * Iterator to notify all connections of a broken link. Mark connections
105 * to destroy after all traffic has been sent.
107 * @param cls Closure (peer disconnected).
108 * @param key Current key code (tid).
109 * @param value Value in the hash map (connection).
111 * @return GNUNET_YES if we should continue to iterate,
115 GMC_notify_broken (void *cls,
116 const struct GNUNET_HashCode *key,
120 * @brief Queue and pass message to core when possible.
122 * @param cls Closure (@c type dependant). It will be used by queue_send to
123 * build the message to be sent if not already prebuilt.
124 * @param type Type of the message, 0 for a raw message.
125 * @param size Size of the message.
126 * @param c Connection this message belongs to (cannot be NULL).
127 * @param ch Channel this message belongs to, if applicable (otherwise NULL).
128 * @param fwd Is this a message going root->dest? (FWD ACK are NOT FWD!)
131 GMC_queue_add (void* cls,
134 struct MeshConnection* c,
135 struct MeshChannel* ch,
140 * Free a transmission that was already queued with all resources
141 * associated to the request.
143 * @param queue Queue handler to cancel.
144 * @param clear_cls Is it necessary to free associated cls?
147 GMC_queue_destroy (struct MeshPeerQueue *queue, int clear_cls);
151 * Core callback to write a queued packet to core buffer
153 * @param cls Closure (peer info).
154 * @param size Number of bytes available in buf.
155 * @param buf Where the to write the message.
157 * @return number of bytes written to buf
160 GMC_queue_send (void *cls, size_t size, void *buf);
165 * Is this peer the first one on the connection?
167 * @param c Connection.
168 * @param fwd Is this about fwd traffic?
170 * @return GNUNET_YES if origin, GNUNET_NO if relay/terminal.
173 GMC_is_origin (struct MeshConnection *c, int fwd);
176 * Is this peer the last one on the connection?
178 * @param c Connection.
179 * @param fwd Is this about fwd traffic?
180 * Note that the ROOT is the terminal for BCK traffic!
182 * @return GNUNET_YES if terminal, GNUNET_NO if relay/origin.
185 GMC_is_terminal (struct MeshConnection *c, int fwd);
188 #if 0 /* keep Emacsens' auto-indent happy */
195 /* ifndef GNUNET_SERVICE_MESH_CONNECTION_H */
197 /* end of gnunet-service-mesh_connection.h */