2 This file is part of GNUnet.
3 (C) 2010,2011 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 "transport.h"
33 #include "gnunet_util_lib.h"
36 // - ATS and similar info is a bit lacking in the API right now...
41 * Initialize the neighbours subsystem.
43 * @param cls closure for callbacks
44 * @param connect_cb function to call if we connect to a peer
45 * @param disconnect_cb function to call if we disconnect from a peer
46 * @param peer_address_cb function to call if a neighbour's active address changes
47 * @param max_fds maximum number of fds to use
50 GST_neighbours_start (void *cls,
51 NotifyConnect connect_cb,
52 GNUNET_TRANSPORT_NotifyDisconnect disconnect_cb,
53 GNUNET_TRANSPORT_PeerIterateCallback peer_address_cb,
54 unsigned int max_fds);
58 * Cleanup the neighbours subsystem.
61 GST_neighbours_stop (void);
65 * Try to create a connection to the given target (eventually).
67 * @param target peer to try to connect to
70 GST_neighbours_try_connect (const struct GNUNET_PeerIdentity *target);
74 * Test if we're connected to the given peer.
76 * @param target peer to test
77 * @return GNUNET_YES if we are connected, GNUNET_NO if not
80 GST_neighbours_test_connected (const struct GNUNET_PeerIdentity *target);
84 * Function called after the transmission is done.
87 * @param success GNUNET_OK on success, GNUNET_NO on failure, GNUNET_SYSERR if we're not connected
89 typedef void (*GST_NeighbourSendContinuation) (void *cls, int success,
91 size_t bytes_on_wire);
95 * Transmit a message to the given target using the active connection.
97 * @param target destination
98 * @param msg message to send
99 * @param msg_size number of bytes in msg
100 * @param timeout when to fail with timeout
101 * @param cont function to call when done
102 * @param cont_cls closure for 'cont'
105 GST_neighbours_send (const struct GNUNET_PeerIdentity *target, const void *msg,
106 size_t msg_size, struct GNUNET_TIME_Relative timeout,
107 GST_NeighbourSendContinuation cont, void *cont_cls);
111 * We have received a message from the given sender.
112 * How long should we delay before receiving more?
113 * (Also used to keep the peer marked as live).
115 * @param sender sender of the message
116 * @param size size of the message
117 * @param do_forward set to GNUNET_YES if the message should be forwarded to clients
118 * GNUNET_NO if the neighbour is not connected or violates the quota
119 * @return how long to wait before reading more from this sender
121 struct GNUNET_TIME_Relative
122 GST_neighbours_calculate_receive_delay (const struct GNUNET_PeerIdentity
123 *sender, ssize_t size, int *do_forward);
127 * Keep the connection to the given neighbour alive longer,
128 * we received a KEEPALIVE (or equivalent).
130 * @param neighbour neighbour to keep alive
133 GST_neighbours_keepalive (const struct GNUNET_PeerIdentity *neighbour);
137 * We received a KEEP_ALIVE_RESPONSE message and use this to calculate latency
140 * @param neighbour neighbour to keep alive
143 GST_neighbours_keepalive_response (const struct GNUNET_PeerIdentity *neighbour);
147 * Change the incoming quota for the given peer.
149 * @param neighbour identity of peer to change qutoa for
150 * @param quota new quota
153 GST_neighbours_set_incoming_quota (const struct GNUNET_PeerIdentity *neighbour,
154 struct GNUNET_BANDWIDTH_Value32NBO quota);
158 * If we have an active connection to the given target, it must be shutdown.
160 * @param target peer to disconnect from
163 GST_neighbours_force_disconnect (const struct GNUNET_PeerIdentity *target);
167 * Function called for each connected neighbour.
170 * @param neighbour identity of the neighbour
171 * @param address the address (or NULL)
172 * @param bandwidth_in inbound quota in NBO
173 * @param bandwidth_out outbound quota in NBO
175 typedef void (*GST_NeighbourIterator) (void *cls,
176 const struct GNUNET_PeerIdentity *
178 const struct GNUNET_HELLO_Address *
180 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
181 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out);
185 * Iterate over all connected neighbours.
187 * @param cb function to call
188 * @param cb_cls closure for cb
191 GST_neighbours_iterate (GST_NeighbourIterator cb, void *cb_cls);
195 * A session was terminated. Take note.
197 * @param peer identity of the peer where the session died
198 * @param session session that is gone
199 * @return GNUNET_YES if this was a session used, GNUNET_NO if
200 * this session was not in use
203 GST_neighbours_session_terminated (const struct GNUNET_PeerIdentity *peer,
204 struct Session *session);
208 * For an existing neighbour record, set the active connection to
209 * use the given address.
211 * @param peer identity of the peer to switch the address for
212 * @param address address of the other peer, NULL if other peer
214 * @param session session to use (or NULL)
215 * @param ats performance data
216 * @param ats_count number of entries in ats
217 * @param bandwidth_in inbound quota to be used when connection is up
218 * @param bandwidth_out outbound quota to be used when connection is up
221 GST_neighbours_switch_to_address (const struct GNUNET_PeerIdentity *peer,
222 const struct GNUNET_HELLO_Address
223 *address, struct Session *session,
224 const struct GNUNET_ATS_Information *ats,
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 SessionConnectMessage' (check format)
235 * @param peer identity of the peer to switch the address for
236 * @param address address of the other peer, NULL if other peer
238 * @param session session to use (or NULL)
241 GST_neighbours_handle_connect (const struct GNUNET_MessageHeader *message,
242 const struct GNUNET_PeerIdentity *peer,
243 const struct GNUNET_HELLO_Address *address,
244 struct Session *session);
248 * We received a 'SESSION_CONNECT_ACK' message from the other peer.
249 * Consider switching to it.
251 * @param message possibly a 'struct SessionConnectMessage' (check format)
252 * @param peer identity of the peer to switch the address for
253 * @param address address of the other peer, NULL if other peer
255 * @param session session to use (or NULL)
258 GST_neighbours_handle_connect_ack (const struct GNUNET_MessageHeader *message,
259 const struct GNUNET_PeerIdentity *peer,
260 const struct GNUNET_HELLO_Address *address,
261 struct Session *session);
265 * We received a 'SESSION_ACK' message from the other peer.
266 * FIXME: describe what this means!
268 * @param message possibly a 'struct SessionConnectMessage' (check format)
269 * @param peer identity of the peer to switch the address for
270 * @param address address of the other peer, NULL if other peer
272 * @param session session to use (or NULL)
275 GST_neighbours_handle_session_ack (const struct GNUNET_MessageHeader *message,
276 const struct GNUNET_PeerIdentity *peer,
277 const struct GNUNET_HELLO_Address *address,
278 struct Session *session);
282 * Obtain current latency information for the given neighbour.
285 * @return observed latency of the address, FOREVER if the address was
286 * never successfully validated
288 struct GNUNET_TIME_Relative
289 GST_neighbour_get_latency (const struct GNUNET_PeerIdentity *peer);
293 * Obtain current address information for the given neighbour.
296 * @return address currently used
298 struct GNUNET_HELLO_Address *
299 GST_neighbour_get_current_address (const struct GNUNET_PeerIdentity *peer);
303 * We received a disconnect message from the given peer,
304 * validate and process.
306 * @param peer sender of the message
307 * @param msg the disconnect message
310 GST_neighbours_handle_disconnect_message (const struct GNUNET_PeerIdentity
312 const struct GNUNET_MessageHeader
317 /* end of file gnunet-service-transport_neighbours.h */