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23 * @file cadet/gnunet-service-cadet-new_connection.h
25 * @author Bartlomiej Polot
26 * @author Christian Grothoff
28 #ifndef GNUNET_SERVICE_CADET_CONNECTION_H
29 #define GNUNET_SERVICE_CADET_CONNECTION_H
31 #include "gnunet_util_lib.h"
32 #include "gnunet-service-cadet-new.h"
33 #include "gnunet-service-cadet-new_peer.h"
34 #include "cadet_protocol.h"
37 * Is the given connection currently ready for transmission?
39 * @param cc connection to transmit on
40 * @return #GNUNET_YES if we could transmit
43 GCC_is_ready (struct CadetConnection *cc);
47 * Destroy a connection.
49 * @param cc connection to destroy
52 GCC_destroy (struct CadetConnection *cc);
56 * Create a connection to @a destination via @a path and
57 * notify @a cb whenever we are ready for more data.
59 * @param destination where to go
60 * @param path which path to take (may not be the full path)
61 * @param ct which tunnel uses this connection
62 * @param ready_cb function to call when ready to transmit
63 * @param ready_cb_cls closure for @a cb
64 * @return handle to the connection
66 struct CadetConnection *
67 GCC_create (struct CadetPeer *destination,
68 struct CadetPeerPath *path,
69 struct CadetTConnection *ct,
70 GNUNET_SCHEDULER_TaskCallback ready_cb,
75 * Create a connection to @a destination via @a path and
76 * notify @a cb whenever we are ready for more data. This
77 * is an inbound tunnel, so we must use the existing @a cid
79 * @param destination where to go
80 * @param path which path to take (may not be the full path)
81 * @param ct which tunnel uses this connection
82 * @param ready_cb function to call when ready to transmit
83 * @param ready_cb_cls closure for @a cb
84 * @return handle to the connection
86 struct CadetConnection *
87 GCC_create_inbound (struct CadetPeer *destination,
88 struct CadetPeerPath *path,
89 struct CadetTConnection *ct,
90 const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid,
91 GNUNET_SCHEDULER_TaskCallback ready_cb,
96 * Transmit message @a msg via connection @a cc. Must only be called
97 * (once) after the connection has signalled that it is ready via the
98 * `ready_cb`. Clients can also use #GCC_is_ready() to check if the
99 * connection is right now ready for transmission.
101 * @param cc connection identification
102 * @param env envelope with message to transmit;
103 * the #GNUNET_MQ_notify_send() must not have yet been used
104 * for the envelope. Also, the message better match the
105 * connection identifier of this connection...
108 GCC_transmit (struct CadetConnection *cc,
109 struct GNUNET_MQ_Envelope *env);
113 * An ACK was received for this connection, process it.
115 * @param cc the connection that got the ACK.
118 GCC_handle_connection_ack (struct CadetConnection *cc);
124 * @param cc connection that received encrypted message
125 * @param msg the key exchange message
128 GCC_handle_kx (struct CadetConnection *cc,
129 const struct GNUNET_CADET_TunnelKeyExchangeMessage *msg);
133 * Handle encrypted message.
135 * @param cc connection that received encrypted message
136 * @param msg the encrypted message to decrypt
139 GCC_handle_encrypted (struct CadetConnection *cc,
140 const struct GNUNET_CADET_TunnelEncryptedMessage *msg);
144 * Return the tunnel associated with this connection.
146 * @param cc connection to query
147 * @return corresponding entry in the tunnel's connection list
149 struct CadetTConnection *
150 GCC_get_ct (struct CadetConnection *cc);
154 * Obtain the path used by this connection.
156 * @param cc connection
157 * @return path to @a cc
159 struct CadetPeerPath *
160 GCC_get_path (struct CadetConnection *cc);
164 * Obtain unique ID for the connection.
166 * @param cc connection.
167 * @return unique number of the connection
169 const struct GNUNET_CADET_ConnectionTunnelIdentifier *
170 GCC_get_id (struct CadetConnection *cc);
174 * Log connection info.
176 * @param cc connection
177 * @param level Debug level to use.
180 GCC_debug (struct CadetConnection *cc,
181 enum GNUNET_ErrorType level);