2 This file is part of GNUnet.
3 Copyright (C) 2010-2015 Christian Grothoff (and other contributing authors)
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22 * @file transport/gnunet-service-transport_neighbours.h
23 * @brief neighbour management API
24 * @author Christian Grothoff
26 #ifndef GNUNET_SERVICE_TRANSPORT_NEIGHBOURS_H
27 #define GNUNET_SERVICE_TRANSPORT_NEIGHBOURS_H
29 #include "gnunet_statistics_service.h"
30 #include "gnunet_transport_service.h"
31 #include "gnunet_transport_plugin.h"
32 #include "gnunet-service-transport.h"
33 #include "transport.h"
34 #include "gnunet_util_lib.h"
38 * Initialize the neighbours subsystem.
40 * @param max_fds maximum number of fds to use
43 GST_neighbours_start (unsigned int max_fds);
47 * Cleanup the neighbours subsystem.
50 GST_neighbours_stop (void);
54 * Try to create a connection to the given target (eventually).
56 * @param target peer to try to connect to
59 GST_neighbours_try_connect (const struct GNUNET_PeerIdentity *target);
63 * Test if we're connected to the given peer.
65 * @param target peer to test
66 * @return #GNUNET_YES if we are connected, #GNUNET_NO if not
69 GST_neighbours_test_connected (const struct GNUNET_PeerIdentity *target);
73 * Function called after the transmission is done.
76 * @param success #GNUNET_OK on success, #GNUNET_NO on failure, #GNUNET_SYSERR if we're not connected
77 * @param bytes_payload how much payload was transmitted
78 * @param bytes_on_wire how many bytes were used on the wire
81 (*GST_NeighbourSendContinuation) (void *cls,
84 size_t bytes_on_wire);
88 * Transmit a message to the given target using the active connection.
90 * @param target destination
91 * @param msg message to send
92 * @param msg_size number of bytes in @a msg
93 * @param timeout when to fail with timeout
94 * @param cont function to call when done
95 * @param cont_cls closure for @a cont
98 GST_neighbours_send (const struct GNUNET_PeerIdentity *target,
101 struct GNUNET_TIME_Relative timeout,
102 GST_NeighbourSendContinuation cont, void *cont_cls);
106 * We have received a message from the given sender.
107 * How long should we delay before receiving more?
108 * (Also used to keep the peer marked as live).
110 * @param sender sender of the message
111 * @param size size of the message
112 * @param do_forward set to #GNUNET_YES if the message should be forwarded to clients
113 * #GNUNET_NO if the neighbour is not connected or violates the quota
114 * @return how long to wait before reading more from this sender
116 struct GNUNET_TIME_Relative
117 GST_neighbours_calculate_receive_delay (const struct GNUNET_PeerIdentity *sender,
123 * Keep the connection to the given neighbour alive longer,
124 * we received a KEEPALIVE (or equivalent); send a response.
126 * @param neighbour neighbour to keep alive (by sending keep alive response)
127 * @param m the keep alive message containing the nonce to respond to
130 GST_neighbours_keepalive (const struct GNUNET_PeerIdentity *neighbour,
131 const struct GNUNET_MessageHeader *m);
135 * We received a KEEP_ALIVE_RESPONSE message and use this to calculate
136 * latency to this peer. Pass the updated information (existing ats
137 * plus calculated latency) to ATS.
139 * @param neighbour neighbour to keep alive
140 * @param m the message containing the keep alive response
143 GST_neighbours_keepalive_response (const struct GNUNET_PeerIdentity *neighbour,
144 const struct GNUNET_MessageHeader *m);
148 * If we have an active connection to the given target, it must be shutdown.
150 * @param target peer to disconnect from
153 GST_neighbours_force_disconnect (const struct GNUNET_PeerIdentity *target);
157 * Function called for each neighbour.
160 * @param peer identity of the neighbour
161 * @param address the address of the neighbour
162 * @param state current state the peer is in
163 * @param state_timeout timeout for this state
164 * @param bandwidth_in inbound quota in NBO
165 * @param bandwidth_out outbound quota in NBO
168 (*GST_NeighbourIterator) (void *cls,
169 const struct GNUNET_PeerIdentity *peer,
170 const struct GNUNET_HELLO_Address *address,
171 enum GNUNET_TRANSPORT_PeerState state,
172 struct GNUNET_TIME_Absolute state_timeout,
173 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
174 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out);
178 * Iterate over all connected neighbours.
180 * @param cb function to call
181 * @param cb_cls closure for @a cb
184 GST_neighbours_iterate (GST_NeighbourIterator cb, void *cb_cls);
188 * A session was terminated. Take note.
190 * @param peer identity of the peer where the session died
191 * @param session session that is gone
192 * @return #GNUNET_YES if this was a session used, #GNUNET_NO if
193 * this session was not in use
196 GST_neighbours_session_terminated (const struct GNUNET_PeerIdentity *peer,
197 struct GNUNET_ATS_Session *session);
201 * Track information about data we received from the
202 * given address (used to notify ATS about our utilization
203 * of allocated resources).
205 * @param address the address we got data from
206 * @param message the message we received (really only the size is used)
209 GST_neighbours_notify_data_recv (const struct GNUNET_HELLO_Address *address,
210 const struct GNUNET_MessageHeader *message);
214 * Track information about data we transmitted using the given @a
215 * address and @a session (used to notify ATS about our utilization of
216 * allocated resources).
218 * @param address the address we transmitted data to
219 * @param session session we used to transmit data
220 * @param message the message we sent (really only the size is used)
223 GST_neighbours_notify_data_sent (const struct GNUNET_HELLO_Address *address,
224 struct GNUNET_ATS_Session *session,
229 * For an existing neighbour record, set the active connection to
230 * use the given address.
232 * @param address address of the other peer to start using
233 * @param session session to use (or NULL)
234 * @param bandwidth_in inbound quota to be used when connection is up
235 * @param bandwidth_out outbound quota to be used when connection is up
238 GST_neighbours_switch_to_address (const struct GNUNET_HELLO_Address *address,
239 struct GNUNET_ATS_Session *session,
240 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
241 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out);
245 * We received a 'SESSION_CONNECT' message from the other peer.
246 * Consider switching to it.
248 * @param message possibly a 'struct GNUNET_ATS_SessionConnectMessage' (check format)
249 * @param peer identity of the peer to switch the address for
250 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
253 GST_neighbours_handle_session_syn (const struct GNUNET_MessageHeader *message,
254 const struct GNUNET_PeerIdentity *peer);
258 * We received a 'SESSION_CONNECT_ACK' message from the other peer.
259 * Consider switching to it.
261 * @param message possibly a `struct GNUNET_ATS_SessionConnectMessage` (check format)
262 * @param address address of the other peer
263 * @param session session to use (or NULL)
264 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
267 GST_neighbours_handle_session_syn_ack (const struct GNUNET_MessageHeader *message,
268 const struct GNUNET_HELLO_Address *address,
269 struct GNUNET_ATS_Session *session);
273 * We received a 'SESSION_ACK' message from the other peer.
274 * If we sent a 'CONNECT_ACK' last, this means we are now
275 * connected. Otherwise, do nothing.
277 * @param message possibly a 'struct GNUNET_ATS_SessionConnectMessage' (check format)
278 * @param address address of the other peer
279 * @param session session to use (or NULL)
280 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
283 GST_neighbours_handle_session_ack (const struct GNUNET_MessageHeader *message,
284 const struct GNUNET_HELLO_Address *address,
285 struct GNUNET_ATS_Session *session);
289 * Obtain current address information for the given neighbour.
292 * @return address currently used
294 const struct GNUNET_HELLO_Address *
295 GST_neighbour_get_current_address (const struct GNUNET_PeerIdentity *peer);
299 * We received a quoat message from the given peer,
300 * validate and process.
302 * @param peer sender of the message
303 * @param msg the quota message
306 GST_neighbours_handle_quota_message (const struct GNUNET_PeerIdentity *peer,
307 const struct GNUNET_MessageHeader *msg);
311 * We received a disconnect message from the given peer,
312 * validate and process.
314 * @param peer sender of the message
315 * @param msg the disconnect message
318 GST_neighbours_handle_disconnect_message (const struct GNUNET_PeerIdentity *peer,
319 const struct GNUNET_MessageHeader *msg);
323 /* end of file gnunet-service-transport_neighbours.h */