2 This file is part of GNUnet.
3 (C) 2010,2011 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
21 * @file include/gnunet_ats_service.h
22 * @brief automatic transport selection and outbound bandwidth determination
23 * @author Christian Grothoff
24 * @author Matthias Wachs
27 * - move GNUNET_TRANSPORT_ATS* in here and rename...
28 * - extend API to express communication preferences to ATS
29 * (to be called DIRECTLY from apps, not from transport/core!)
31 #ifndef GNUNET_ATS_SERVICE_H
32 #define GNUNET_ATS_SERVICE_H
34 #include "gnunet_constants.h"
35 #include "gnunet_util_lib.h"
36 #include "gnunet_transport_service.h"
37 #include "gnunet_transport_plugin.h"
41 * Handle to the ATS subsystem.
43 struct GNUNET_ATS_Handle;
47 * Signature of a function called by ATS to notify the callee that the
48 * assigned bandwidth or address for a given peer was changed. If the
49 * callback is called with address/bandwidth assignments of zero, the
50 * ATS disconnect function will still be called once the disconnect
54 * @param peer identity of the peer
55 * @param plugin_name name of the transport plugin, NULL to disconnect
56 * @param session session to use (if available)
57 * @param plugin_addr address to use (if available)
58 * @param plugin_addr_len number of bytes in addr
59 * @param bandwidth assigned outbound bandwidth for the connection
61 typedef void (*GNUNET_TRANSPORT_ATS_AllocationNotification)(void *cls,
62 const struct GNUNET_PeerIdentity *peer,
63 const char *plugin_name,
64 struct Session *session,
65 const void *plugin_addr,
66 size_t plugin_addr_len,
67 struct GNUNET_BANDWIDTH_Value32NBO bandwidth);
71 * Initialize the ATS subsystem.
73 * @param cfg configuration to use
74 * @param alloc_cb notification to call whenever the allocation changed
75 * @param alloc_cb_cls closure for 'alloc_cb'
78 struct GNUNET_ATS_Handle *
79 GNUNET_ATS_init (const struct GNUNET_CONFIGURATION_Handle *cfg,
80 GNUNET_TRANSPORT_ATS_AllocationNotification alloc_cb,
85 * Shutdown the ATS subsystem.
90 GNUNET_ATS_shutdown (struct GNUNET_ATS_Handle *atc);
94 * Signature of a function that takes an address suggestion
97 * @param peer identity of the new peer
98 * @param plugin_name name of the plugin, NULL if we have no suggestion
99 * @param plugin_addr suggested address, NULL if we have no suggestion
100 * @param plugin_addr_len number of bytes in plugin_addr
101 * @param bandwidth assigned outbound bandwidth for the connection
102 * @param ats performance data for the address (as far as known)
103 * @param ats_count number of performance records in 'ats'
105 typedef void (*GNUNET_ATS_AddressSuggestionCallback)(void *cls,
106 const struct GNUNET_PeerIdentity *peer,
107 const char *plugin_name,
108 const void *plugin_addr,
109 size_t plugin_addr_len,
110 struct GNUNET_BANDWIDTH_Value32NBO bandwidth,
111 const struct GNUNET_TRANSPORT_ATS_Information *ats,
116 * Handle to cancel suggestion request.
118 struct GNUNET_ATS_SuggestionContext;
122 * We would like to establish a new connection with a peer.
123 * ATS should suggest a good address to begin with.
126 * @param peer identity of the new peer
127 * @param cb function to call with the address
128 * @param cb_cls closure for cb
130 struct GNUNET_ATS_SuggestionContext *
131 GNUNET_ATS_suggest_address (struct GNUNET_ATS_Handle *atc,
132 const struct GNUNET_PeerIdentity *peer,
133 GNUNET_ATS_AddressSuggestionCallback cb,
138 * Cancel suggestion request.
140 * @param asc handle of the request to cancel
143 GNUNET_ATS_suggest_address_cancel (struct GNUNET_ATS_SuggestionContext *asc);
147 * We established a new connection with a peer (for example, because
148 * core asked for it or because the other peer connected to us).
149 * Calculate bandwidth assignments including the new peer.
152 * @param peer identity of the new peer
153 * @param plugin_name name of the currently used transport plugin
154 * @param session session in use (if available)
155 * @param plugin_addr address in use (if available)
156 * @param plugin_addr_len number of bytes in plugin_addr
157 * @param ats performance data for the connection
158 * @param ats_count number of performance records in 'ats'
161 GNUNET_ATS_peer_connect (struct GNUNET_ATS_Handle *atc,
162 const struct GNUNET_PeerIdentity *peer,
163 const char *plugin_name,
164 struct Session *session,
165 const void *plugin_addr,
166 size_t plugin_addr_len,
167 const struct GNUNET_TRANSPORT_ATS_Information *ats,
172 * We disconnected from the given peer (for example, because ats, core
173 * or blacklist asked for it or because the other peer disconnected).
174 * Calculate bandwidth assignments without the peer.
177 * @param peer identity of the peer
180 GNUNET_ATS_peer_disconnect (struct GNUNET_ATS_Handle *atc,
181 const struct GNUNET_PeerIdentity *peer);
185 * A session got destroyed, stop including it as a valid address.
188 * @param peer identity of the peer
189 * @param session session handle that is no longer valid
192 GNUNET_ATS_session_destroyed (struct GNUNET_ATS_Handle *atc,
193 const struct GNUNET_PeerIdentity *peer,
194 const struct Session *session);
198 * We have updated performance statistics for a given address. Note
199 * that this function can be called for addresses that are currently
200 * in use as well as addresses that are valid but not actively in use.
201 * Furthermore, the peer may not even be connected to us right now (in
202 * which case the call may be ignored or the information may be stored
203 * for later use). Update bandwidth assignments.
206 * @param peer identity of the new peer
207 * @param valid_until how long is the address valid?
208 * @param plugin_name name of the transport plugin
209 * @param session session handle (if available)
210 * @param plugin_addr address (if available)
211 * @param plugin_addr_len number of bytes in plugin_addr
212 * @param ats performance data for the address
213 * @param ats_count number of performance records in 'ats'
216 GNUNET_ATS_address_update (struct GNUNET_ATS_Handle *atc,
217 const struct GNUNET_PeerIdentity *peer,
218 struct GNUNET_TIME_Absolute valid_until,
219 const char *plugin_name,
220 struct Session *session,
221 const void *plugin_addr,
222 size_t plugin_addr_len,
223 const struct GNUNET_TRANSPORT_ATS_Information *ats,
228 /* end of file gnunet-service-transport_ats.h */