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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_ats_service.h"
41 #include "gnunet_statistics_service.h"
44 * Representation of an address the plugin can choose from.
49 * Change the preference for a peer
51 * @param handle the solver handle
52 * @param client the client sending this request
53 * @param peer the peer id
54 * @param kind the preference kind to change
55 * @param score the new preference score
56 * @param pref_rel the normalized preference value for this kind over all clients
59 (*GAS_solver_address_change_preference) (void *solver,
60 const struct GNUNET_PeerIdentity *peer,
61 enum GNUNET_ATS_PreferenceKind kind,
66 * Give feedback about the current assignment
68 * @param handle the solver handle
69 * @param application the application sending this request
70 * @param peer the peer id
71 * @param scope the time interval for this feedback: [now - scope .. now]
72 * @param kind the preference kind for this feedback
73 * @param score the feedback score
76 (*GAS_solver_address_feedback_preference) (void *solver,
77 struct GNUNET_SERVICE_Client *application,
78 const struct GNUNET_PeerIdentity *peer,
79 const struct GNUNET_TIME_Relative scope,
80 enum GNUNET_ATS_PreferenceKind kind,
84 * Notify the solver about a bulk operation changing possibly a lot of values
85 * Solver will not resolve until all bulk operations are marked as done
87 * @param solver the solver
90 (*GAS_solver_bulk_start) (void *solver);
94 * Mark a bulk operation as done
95 * Solver will resolve if values have changed
97 * @param solver the solver
100 (*GAS_solver_bulk_stop) (void *solver);
104 * Add a single address within a network to the solver
106 * @param solver the solver Handle
107 * @param address the address to add
108 * @param network network type of this address
111 (*GAS_solver_address_add) (void *solver,
112 struct ATS_Address *address,
117 * Delete an address or just the session from the solver
119 * @param solver the solver Handle
120 * @param address the address to delete
123 (*GAS_solver_address_delete) (void *solver,
124 struct ATS_Address *address);
128 * Transport properties for this address have changed
130 * @param solver solver handle
131 * @param address the address
134 (*GAS_solver_address_property_changed) (void *solver,
135 struct ATS_Address *address);
139 * Get the prefered address for a peer from solver
141 * @param solver the solver to use
142 * @param peer the peer
145 (*GAS_solver_get_preferred_address) (void *solver,
146 const struct GNUNET_PeerIdentity *peer);
150 * Stop getting the prefered address for a peer from solver
152 * @param solver the solver to use
153 * @param peer the peer
156 (*GAS_solver_stop_get_preferred_address) (void *solver,
157 const struct GNUNET_PeerIdentity *peer);
163 * Each solver is required to set up and return an instance
164 * of this struct during initialization.
166 struct GNUNET_ATS_SolverFunctions {
168 * Closure to pass to all solver functions in this struct.
173 * Add a new address for a peer to the solver
175 * The address is already contained in the addresses hashmap!
177 GAS_solver_address_add s_add;
180 * Update the properties of an address in the solver
182 GAS_solver_address_property_changed s_address_update_property;
185 * Tell solver to notify ATS if the address to use changes for a specific
186 * peer using the bandwidth changed callback
188 * The solver must only notify about changes for peers with pending address
191 GAS_solver_get_preferred_address s_get;
194 * Tell solver stop notifying ATS about changes for this peers
196 * The solver must only notify about changes for peers with pending address
199 GAS_solver_stop_get_preferred_address s_get_stop;
202 * Delete an address in the solver
204 * The address is not contained in the address hashmap anymore!
206 GAS_solver_address_delete s_del;
209 * Change relative preference for quality in solver
211 GAS_solver_address_change_preference s_pref;
214 * Give feedback about the current assignment
216 GAS_solver_address_feedback_preference s_feedback;
219 * Start a bulk operation
221 * Used if many values have to be updated at the same time.
222 * When a bulk operation is pending the solver does not have to resolve
223 * the problem since more updates will follow anyway
225 * For each call to bulk_start, a call to bulk_stop is required!
227 GAS_solver_bulk_start s_bulk_start;
230 * Bulk operation done
232 * If no more bulk operations are pending, the solver can solve the problem
233 * with the updated values
235 GAS_solver_bulk_stop s_bulk_stop;
240 * Operation codes for solver information callback
242 * Order of calls is expected to be:
243 * #GAS_OP_SOLVE_START
245 * #GAS_OP_SOLVE_UPDATE_NOTIFICATION_START
246 * #GAS_OP_SOLVE_UPDATE_NOTIFICATION_STOP
249 enum GAS_Solver_Operation {
251 * A solution iteration has been started
256 * A solution iteration has been finished
261 * The setup of the problem as a preparation to solve it was started
263 GAS_OP_SOLVE_SETUP_START,
266 * The setup of the problem as a preparation to solve is finished
268 GAS_OP_SOLVE_SETUP_STOP,
271 * Solving of the LP problem was started
274 GAS_OP_SOLVE_MLP_LP_START,
277 * Solving of the LP problem is done
280 GAS_OP_SOLVE_MLP_LP_STOP,
283 * Solving of the MLP problem was started
286 GAS_OP_SOLVE_MLP_MLP_START,
289 * Solving of the MLP problem is done
292 GAS_OP_SOLVE_MLP_MLP_STOP,
295 * After the problem was finished, start notifications about changes
298 GAS_OP_SOLVE_UPDATE_NOTIFICATION_START,
301 * After the problem was finished, notifications about changes to addresses
304 GAS_OP_SOLVE_UPDATE_NOTIFICATION_STOP
309 * Status of a GAS_Solver_Operation operation
311 enum GAS_Solver_Status {
325 * Status of the operation
327 enum GAS_Solver_Additional_Information {
329 * No more specific information
334 * A full solution process is performed
335 * Quite specific to the MLP solver
340 * An existing solution was reused
341 * Quite specific to the MLP solver
346 * The proportional solver had to recalculate for a single network
348 GAS_INFO_PROP_SINGLE,
351 * The proportional solver had to recalculate for all networks
358 * Callback to call with additional information
359 * Used for measurement
361 * @param cls the closure
362 * @param op the operation
365 (*GAS_solver_information_callback) (void *cls,
366 enum GAS_Solver_Operation op,
367 enum GAS_Solver_Status stat,
368 enum GAS_Solver_Additional_Information);
372 * Callback to call from solver when bandwidth for address has changed
374 * @param address the with changed bandwidth assigned
377 (*GAS_bandwidth_changed_cb) (void *cls,
378 struct ATS_Address *address);
382 * Callback to call from solver to obtain application preference
386 * @param id the peer id
387 * @return carry of double values containing the preferences with
388 * GNUNET_ATS_PreferenceCount elements
390 typedef const double *
391 (*GAS_get_preferences) (void *cls,
392 const struct GNUNET_PeerIdentity *id);
396 * Callback to call from solver to obtain application connectivity
397 * preferences for a peer.
400 * @param id the peer id
401 * @return 0 if connectivity is not desired, non-null if address
402 * suggestions are requested
405 (*GAS_get_connectivity) (void *cls,
406 const struct GNUNET_PeerIdentity *id);
410 * The ATS plugin will pass a pointer to a struct
411 * of this type as to the initialization function
412 * of the ATS plugins.
414 struct GNUNET_ATS_PluginEnvironment {
416 * Configuration handle to be used by the solver
418 const struct GNUNET_CONFIGURATION_Handle *cfg;
421 * Statistics handle to be used by the solver
423 struct GNUNET_STATISTICS_Handle *stats;
426 * Closure to pass to all callbacks in this struct.
431 * Hashmap containing all addresses available
433 struct GNUNET_CONTAINER_MultiPeerMap *addresses;
436 * ATS addresses callback to be notified about bandwidth assignment changes
438 GAS_bandwidth_changed_cb bandwidth_changed_cb;
441 * ATS addresses function to obtain preference values
443 GAS_get_preferences get_preferences;
446 * ATS addresses function to obtain preference values
448 GAS_get_connectivity get_connectivity;
451 * Callback for solver to call with status information,
454 GAS_solver_information_callback info_cb;
457 * Number of networks available, size of the @e out_quota
458 * and @e in_quota arrays.
460 unsigned int network_count;
463 * Array of configured outbound quotas
464 * Order according to networks in network array
466 unsigned long long out_quota[GNUNET_NT_COUNT];
469 * Array of configured inbound quotas
470 * Order according to networks in network array
472 unsigned long long in_quota[GNUNET_NT_COUNT];
477 /** @} */ /* end of group */