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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_mq_lib.h"
39 #include "gnunet_bandwidth_lib.h"
40 #include "gnunet_ats_application_service.h"
41 #include "gnunet_ats_transport_service.h"
42 #include "gnunet_statistics_service.h"
46 * Preference being expressed by an application client.
48 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 {
78 * Peer the session is with.
80 struct GNUNET_PeerIdentity peer;
83 * ATS performance characteristics for a session.
85 struct GNUNET_ATS_Properties prop;
88 * Handle to the session that has the given properties.
90 struct GNUNET_ATS_Session *session;
93 * Is the session inbound only?
100 * Internal representation of a preference by the plugin.
101 * (If desired, plugin may just use NULL.)
103 struct GNUNET_ATS_PreferenceHandle;
106 * Internal representation of a session by the plugin.
107 * (If desired, plugin may just use NULL.)
109 struct GNUNET_ATS_SessionHandle;
115 * Each solver is required to set up and return an instance
116 * of this struct during initialization.
118 struct GNUNET_ATS_SolverFunctions
122 * Closure to pass to all solver functions in this struct.
127 * The plugin should begin to respect a new preference.
129 * @param cls the closure
130 * @param pref the preference to add
131 * @return plugin's internal representation, or NULL
133 struct GNUNET_ATS_PreferenceHandle *
134 (*preference_add)(void *cls,
135 const struct GNUNET_ATS_Preference *pref);
138 * The plugin should end respecting a preference.
140 * @param cls the closure
141 * @param ph whatever @e preference_add returned
142 * @param pref the preference to delete
143 * @return plugin's internal representation, or NULL
146 (*preference_del)(void *cls,
147 struct GNUNET_ATS_PreferenceHandle *ph,
148 const struct GNUNET_ATS_Preference *pref);
151 * Transport established a new session with performance
152 * characteristics given in @a data.
155 * @param data performance characteristics of @a sh
156 * @param address address information (for debugging)
157 * @return handle by which the plugin will identify this session
159 struct GNUNET_ATS_SessionHandle *
160 (*session_add)(void *cls,
161 const struct GNUNET_ATS_SessionData *data,
162 const char *address);
165 * @a data changed for a given @a sh, solver should consider
166 * the updated performance characteristics.
169 * @param sh session this is about
170 * @param data performance characteristics of @a sh
173 (*session_update)(void *cls,
174 struct GNUNET_ATS_SessionHandle *sh,
175 const struct GNUNET_ATS_SessionData *data);
178 * A session went away. Solver should update accordingly.
181 * @param sh session this is about
182 * @param data (last) performance characteristics of @a sh
185 (*session_del)(void *cls,
186 struct GNUNET_ATS_SessionHandle *sh,
187 const struct GNUNET_ATS_SessionData *data);
193 * The ATS plugin will pass a pointer to a struct
194 * of this type as to the initialization function
195 * of the ATS plugins.
197 struct GNUNET_ATS_PluginEnvironment
200 * Configuration handle to be used by the solver
202 const struct GNUNET_CONFIGURATION_Handle *cfg;
205 * Statistics handle to be used by the solver
207 struct GNUNET_STATISTICS_Handle *stats;
210 * Closure to pass to all callbacks in this struct.
215 * Suggest to the transport that it should try establishing
216 * a connection using the given address.
218 * @param cls closure, NULL
219 * @param pid peer this is about
220 * @param address address the transport should try
223 (*suggest_cb) (void *cls,
224 const struct GNUNET_PeerIdentity *pid,
225 const char *address);
228 * Tell the transport that it should allocate the given
229 * bandwidth to the specified session.
231 * @param cls closure, NULL
232 * @param session session this is about
233 * @param peer peer this is about
234 * @param bw_in suggested bandwidth for receiving
235 * @param bw_out suggested bandwidth for transmission
238 (*allocate_cb) (void *cls,
239 struct GNUNET_ATS_Session *session,
240 const struct GNUNET_PeerIdentity *peer,
241 struct GNUNET_BANDWIDTH_Value32NBO bw_in,
242 struct GNUNET_BANDWIDTH_Value32NBO bw_out);
250 /** @} */ /* end of group */