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18 SPDX-License-Identifier: AGPL3.0-or-later
22 * @author Christian Grothoff
25 * API for the ATS solvers.
27 * @defgroup ats-plugin ATS service plugin API
28 * Plugin API for the ATS service.
30 * Specifies the struct that is given to the plugin's entry method and the other
31 * struct that must be returned. Note that the destructors of ATS plugins will
32 * be given the value returned by the constructor and is expected to return a
40 #include "gnunet_util_lib.h"
41 #include "gnunet_ats_application_service.h"
42 #include "gnunet_ats_transport_service.h"
43 #include "gnunet_statistics_service.h"
47 * Preference being expressed by an application client.
49 struct GNUNET_ATS_Preference {
51 * Peer to get address suggestions for.
53 struct GNUNET_PeerIdentity peer;
56 * How much bandwidth in bytes/second does the application expect?
58 struct GNUNET_BANDWIDTH_Value32NBO bw;
61 * What type of performance preference does the client have?
63 enum GNUNET_MQ_PreferenceKind pk;
68 * Opaque representation of a session the plugin can allocate bandwidth for.
70 struct GNUNET_ATS_Session;
73 * Plugin-relevant information about a session.
75 struct GNUNET_ATS_SessionData {
77 * Peer the session is with.
79 struct GNUNET_PeerIdentity peer;
82 * ATS performance characteristics for a session.
84 struct GNUNET_ATS_Properties prop;
87 * Handle to the session that has the given properties.
89 struct GNUNET_ATS_Session *session;
92 * Is the session inbound only?
98 * Internal representation of a preference by the plugin.
99 * (If desired, plugin may just use NULL.)
101 struct GNUNET_ATS_PreferenceHandle;
104 * Internal representation of a session by the plugin.
105 * (If desired, plugin may just use NULL.)
107 struct GNUNET_ATS_SessionHandle;
113 * Each solver is required to set up and return an instance
114 * of this struct during initialization.
116 struct GNUNET_ATS_SolverFunctions {
118 * Closure to pass to all solver functions in this struct.
123 * The plugin should begin to respect a new preference.
125 * @param cls the closure
126 * @param pref the preference to add
127 * @return plugin's internal representation, or NULL
129 struct GNUNET_ATS_PreferenceHandle *
130 (*preference_add)(void *cls,
131 const struct GNUNET_ATS_Preference *pref);
134 * The plugin should end respecting a preference.
136 * @param cls the closure
137 * @param ph whatever @e preference_add returned
138 * @param pref the preference to delete
139 * @return plugin's internal representation, or NULL
142 (*preference_del)(void *cls,
143 struct GNUNET_ATS_PreferenceHandle *ph,
144 const struct GNUNET_ATS_Preference *pref);
147 * Transport established a new session with performance
148 * characteristics given in @a data.
151 * @param data performance characteristics of @a sh
152 * @param address address information (for debugging)
153 * @return handle by which the plugin will identify this session
155 struct GNUNET_ATS_SessionHandle *
156 (*session_add)(void *cls,
157 const struct GNUNET_ATS_SessionData *data,
158 const char *address);
161 * @a data changed for a given @a sh, solver should consider
162 * the updated performance characteristics.
165 * @param sh session this is about
166 * @param data performance characteristics of @a sh
169 (*session_update)(void *cls,
170 struct GNUNET_ATS_SessionHandle *sh,
171 const struct GNUNET_ATS_SessionData *data);
174 * A session went away. Solver should update accordingly.
177 * @param sh session this is about
178 * @param data (last) performance characteristics of @a sh
181 (*session_del)(void *cls,
182 struct GNUNET_ATS_SessionHandle *sh,
183 const struct GNUNET_ATS_SessionData *data);
188 * The ATS plugin will pass a pointer to a struct
189 * of this type as to the initialization function
190 * of the ATS plugins.
192 struct GNUNET_ATS_PluginEnvironment {
194 * Configuration handle to be used by the solver
196 const struct GNUNET_CONFIGURATION_Handle *cfg;
199 * Statistics handle to be used by the solver
201 struct GNUNET_STATISTICS_Handle *stats;
204 * Closure to pass to all callbacks in this struct.
209 * Suggest to the transport that it should try establishing
210 * a connection using the given address.
212 * @param cls closure, NULL
213 * @param pid peer this is about
214 * @param address address the transport should try
217 (*suggest_cb) (void *cls,
218 const struct GNUNET_PeerIdentity *pid,
219 const char *address);
222 * Tell the transport that it should allocate the given
223 * bandwidth to the specified session.
225 * @param cls closure, NULL
226 * @param session session this is about
227 * @param peer peer this is about
228 * @param bw_in suggested bandwidth for receiving
229 * @param bw_out suggested bandwidth for transmission
232 (*allocate_cb) (void *cls,
233 struct GNUNET_ATS_Session *session,
234 const struct GNUNET_PeerIdentity *peer,
235 struct GNUNET_BANDWIDTH_Value32NBO bw_in,
236 struct GNUNET_BANDWIDTH_Value32NBO bw_out);
243 /** @} */ /* end of group */