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17 * @file transport/gnunet-service-transport_neighbours.h
18 * @brief neighbour management API
19 * @author Christian Grothoff
21 #ifndef GNUNET_SERVICE_TRANSPORT_NEIGHBOURS_H
22 #define GNUNET_SERVICE_TRANSPORT_NEIGHBOURS_H
24 #include "gnunet_statistics_service.h"
25 #include "gnunet_transport_service.h"
26 #include "gnunet_transport_plugin.h"
27 #include "gnunet-service-transport.h"
28 #include "transport.h"
29 #include "gnunet_util_lib.h"
33 * Initialize the neighbours subsystem.
35 * @param max_fds maximum number of fds to use
38 GST_neighbours_start (unsigned int max_fds);
42 * Cleanup the neighbours subsystem.
45 GST_neighbours_stop (void);
49 * Test if we're connected to the given peer.
51 * @param target peer to test
52 * @return #GNUNET_YES if we are connected, #GNUNET_NO if not
55 GST_neighbours_test_connected (const struct GNUNET_PeerIdentity *target);
59 * Function called after the transmission is done.
62 * @param success #GNUNET_OK on success, #GNUNET_NO on failure, #GNUNET_SYSERR if we're not connected
63 * @param bytes_payload how much payload was transmitted
64 * @param bytes_on_wire how many bytes were used on the wire
67 (*GST_NeighbourSendContinuation) (void *cls,
70 size_t bytes_on_wire);
74 * Transmit a message to the given target using the active connection.
76 * @param target destination
77 * @param msg message to send
78 * @param msg_size number of bytes in @a msg
79 * @param timeout when to fail with timeout
80 * @param cont function to call when done
81 * @param cont_cls closure for @a cont
84 GST_neighbours_send (const struct GNUNET_PeerIdentity *target,
87 struct GNUNET_TIME_Relative timeout,
88 GST_NeighbourSendContinuation cont, void *cont_cls);
92 * We have received a message from the given sender.
93 * How long should we delay before receiving more?
94 * (Also used to keep the peer marked as live).
96 * @param sender sender of the message
97 * @param size size of the message
98 * @param do_forward set to #GNUNET_YES if the message should be forwarded to clients
99 * #GNUNET_NO if the neighbour is not connected or violates the quota
100 * @return how long to wait before reading more from this sender
102 struct GNUNET_TIME_Relative
103 GST_neighbours_calculate_receive_delay (const struct GNUNET_PeerIdentity *sender,
109 * Keep the connection to the given neighbour alive longer,
110 * we received a KEEPALIVE (or equivalent); send a response.
112 * @param neighbour neighbour to keep alive (by sending keep alive response)
113 * @param m the keep alive message containing the nonce to respond to
116 GST_neighbours_keepalive (const struct GNUNET_PeerIdentity *neighbour,
117 const struct GNUNET_MessageHeader *m);
121 * We received a KEEP_ALIVE_RESPONSE message and use this to calculate
122 * latency to this peer. Pass the updated information (existing ats
123 * plus calculated latency) to ATS.
125 * @param neighbour neighbour to keep alive
126 * @param m the message containing the keep alive response
129 GST_neighbours_keepalive_response (const struct GNUNET_PeerIdentity *neighbour,
130 const struct GNUNET_MessageHeader *m);
134 * If we have an active connection to the given target, it must be shutdown.
136 * @param target peer to disconnect from
139 GST_neighbours_force_disconnect (const struct GNUNET_PeerIdentity *target);
143 * Function called for each neighbour.
146 * @param peer identity of the neighbour
147 * @param address the address of the neighbour
148 * @param state current state the peer is in
149 * @param state_timeout timeout for this state
150 * @param bandwidth_in inbound quota in NBO
151 * @param bandwidth_out outbound quota in NBO
154 (*GST_NeighbourIterator) (void *cls,
155 const struct GNUNET_PeerIdentity *peer,
156 const struct GNUNET_HELLO_Address *address,
157 enum GNUNET_TRANSPORT_PeerState state,
158 struct GNUNET_TIME_Absolute state_timeout,
159 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
160 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out);
164 * Iterate over all connected neighbours.
166 * @param cb function to call
167 * @param cb_cls closure for @a cb
170 GST_neighbours_iterate (GST_NeighbourIterator cb, void *cb_cls);
174 * A session was terminated. Take note.
176 * @param peer identity of the peer where the session died
177 * @param session session that is gone
178 * @return #GNUNET_YES if this was a session used, #GNUNET_NO if
179 * this session was not in use
182 GST_neighbours_session_terminated (const struct GNUNET_PeerIdentity *peer,
183 struct GNUNET_ATS_Session *session);
187 * Track information about data we received from the
188 * given address (used to notify ATS about our utilization
189 * of allocated resources).
191 * @param address the address we got data from
192 * @param message the message we received (really only the size is used)
195 GST_neighbours_notify_data_recv (const struct GNUNET_HELLO_Address *address,
196 const struct GNUNET_MessageHeader *message);
200 * Track information about data we transmitted using the given @a
201 * address and @a session (used to notify ATS about our utilization of
202 * allocated resources).
204 * @param address the address we transmitted data to
205 * @param session session we used to transmit data
206 * @param message the message we sent (really only the size is used)
209 GST_neighbours_notify_data_sent (const struct GNUNET_HELLO_Address *address,
210 struct GNUNET_ATS_Session *session,
215 * For an existing neighbour record, set the active connection to
216 * use the given address.
218 * @param address address of the other peer to start using
219 * @param session session to use (or NULL)
220 * @param bandwidth_in inbound quota to be used when connection is up
221 * @param bandwidth_out outbound quota to be used when connection is up
224 GST_neighbours_switch_to_address (const struct GNUNET_HELLO_Address *address,
225 struct GNUNET_ATS_Session *session,
226 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
227 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out);
231 * We received a 'SESSION_CONNECT' message from the other peer.
232 * Consider switching to it.
234 * @param message possibly a 'struct GNUNET_ATS_SessionConnectMessage' (check format)
235 * @param peer identity of the peer to switch the address for
236 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
239 GST_neighbours_handle_session_syn (const struct GNUNET_MessageHeader *message,
240 const struct GNUNET_PeerIdentity *peer);
244 * We received a 'SESSION_CONNECT_ACK' message from the other peer.
245 * Consider switching to it.
247 * @param message possibly a `struct GNUNET_ATS_SessionConnectMessage` (check format)
248 * @param address address of the other peer
249 * @param session session to use (or NULL)
250 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
253 GST_neighbours_handle_session_syn_ack (const struct GNUNET_MessageHeader *message,
254 const struct GNUNET_HELLO_Address *address,
255 struct GNUNET_ATS_Session *session);
259 * We received a 'SESSION_ACK' message from the other peer.
260 * If we sent a 'CONNECT_ACK' last, this means we are now
261 * connected. Otherwise, do nothing.
263 * @param message possibly a 'struct GNUNET_ATS_SessionConnectMessage' (check format)
264 * @param address address of the other peer
265 * @param session session to use (or NULL)
266 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
269 GST_neighbours_handle_session_ack (const struct GNUNET_MessageHeader *message,
270 const struct GNUNET_HELLO_Address *address,
271 struct GNUNET_ATS_Session *session);
275 * Obtain current address information for the given neighbour.
278 * @return address currently used
280 const struct GNUNET_HELLO_Address *
281 GST_neighbour_get_current_address (const struct GNUNET_PeerIdentity *peer);
285 * We received a quoat message from the given peer,
286 * validate and process.
288 * @param peer sender of the message
289 * @param msg the quota message
292 GST_neighbours_handle_quota_message (const struct GNUNET_PeerIdentity *peer,
293 const struct GNUNET_MessageHeader *msg);
297 * We received a disconnect message from the given peer,
298 * validate and process.
300 * @param peer sender of the message
301 * @param msg the disconnect message
304 GST_neighbours_handle_disconnect_message (const struct GNUNET_PeerIdentity *peer,
305 const struct GNUNET_MessageHeader *msg);
309 /* end of file gnunet-service-transport_neighbours.h */