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20 * @author Christian Grothoff
23 * API for the ATS solvers.
25 * @defgroup ats-plugin ATS service plugin API
26 * Plugin API for the ATS service.
28 * Specifies the struct that is given to the plugin's entry method and the other
29 * struct that must be returned. Note that the destructors of ATS plugins will
30 * be given the value returned by the constructor and is expected to return a
38 #include "gnunet_util_lib.h"
39 #include "gnunet_ats_application_service.h"
40 #include "gnunet_ats_transport_service.h"
41 #include "gnunet_statistics_service.h"
45 * Preference being expressed by an application client.
47 struct GNUNET_ATS_Preference {
50 * Peer to get address suggestions for.
52 struct GNUNET_PeerIdentity peer;
55 * How much bandwidth in bytes/second does the application expect?
57 struct GNUNET_BANDWIDTH_Value32NBO bw;
60 * What type of performance preference does the client have?
62 enum GNUNET_MQ_PreferenceKind pk;
67 * Opaque representation of a session the plugin can allocate bandwidth for.
69 struct GNUNET_ATS_Session;
72 * Plugin-relevant information about a session.
74 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?
99 * Internal representation of a preference by the plugin.
100 * (If desired, plugin may just use NULL.)
102 struct GNUNET_ATS_PreferenceHandle;
105 * Internal representation of a session by the plugin.
106 * (If desired, plugin may just use NULL.)
108 struct GNUNET_ATS_SessionHandle;
114 * Each solver is required to set up and return an instance
115 * of this struct during initialization.
117 struct GNUNET_ATS_SolverFunctions
121 * Closure to pass to all solver functions in this struct.
126 * The plugin should begin to respect a new preference.
128 * @param cls the closure
129 * @param pref the preference to add
130 * @return plugin's internal representation, or NULL
132 struct GNUNET_ATS_PreferenceHandle *
133 (*preference_add)(void *cls,
134 const struct GNUNET_ATS_Preference *pref);
137 * The plugin should end respecting a preference.
139 * @param cls the closure
140 * @param ph whatever @e preference_add returned
141 * @param pref the preference to delete
142 * @return plugin's internal representation, or NULL
145 (*preference_del)(void *cls,
146 struct GNUNET_ATS_PreferenceHandle *ph,
147 const struct GNUNET_ATS_Preference *pref);
150 * Transport established a new session with performance
151 * characteristics given in @a data.
154 * @param data performance characteristics of @a sh
155 * @param address address information (for debugging)
156 * @return handle by which the plugin will identify this session
158 struct GNUNET_ATS_SessionHandle *
159 (*session_add)(void *cls,
160 const struct GNUNET_ATS_SessionData *data,
161 const char *address);
164 * @a data changed for a given @a sh, solver should consider
165 * the updated performance characteristics.
168 * @param sh session this is about
169 * @param data performance characteristics of @a sh
172 (*session_update)(void *cls,
173 struct GNUNET_ATS_SessionHandle *sh,
174 const struct GNUNET_ATS_SessionData *data);
177 * A session went away. Solver should update accordingly.
180 * @param sh session this is about
181 * @param data (last) performance characteristics of @a sh
184 (*session_del)(void *cls,
185 struct GNUNET_ATS_SessionHandle *sh,
186 const struct GNUNET_ATS_SessionData *data);
192 * The ATS plugin will pass a pointer to a struct
193 * of this type as to the initialization function
194 * of the ATS plugins.
196 struct GNUNET_ATS_PluginEnvironment
199 * Configuration handle to be used by the solver
201 const struct GNUNET_CONFIGURATION_Handle *cfg;
204 * Statistics handle to be used by the solver
206 struct GNUNET_STATISTICS_Handle *stats;
209 * Closure to pass to all callbacks in this struct.
214 * Suggest to the transport that it should try establishing
215 * a connection using the given address.
217 * @param cls closure, NULL
218 * @param pid peer this is about
219 * @param address address the transport should try
222 (*suggest_cb) (void *cls,
223 const struct GNUNET_PeerIdentity *pid,
224 const char *address);
227 * Tell the transport that it should allocate the given
228 * bandwidth to the specified session.
230 * @param cls closure, NULL
231 * @param session session this is about
232 * @param peer peer this is about
233 * @param bw_in suggested bandwidth for receiving
234 * @param bw_out suggested bandwidth for transmission
237 (*allocate_cb) (void *cls,
238 struct GNUNET_ATS_Session *session,
239 const struct GNUNET_PeerIdentity *peer,
240 struct GNUNET_BANDWIDTH_Value32NBO bw_in,
241 struct GNUNET_BANDWIDTH_Value32NBO bw_out);
249 /** @} */ /* end of group */