summaryrefslogtreecommitdiff
path: root/src/ats/gnunet-service-ats_plugins.c
blob: 4b998b982ff9f4226f0cf8439775b931e16fe27d (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
/*
 This file is part of GNUnet.
 Copyright (C) 2011-2014 GNUnet e.V.

 GNUnet is free software: you can redistribute it and/or modify it
 under the terms of the GNU Affero General Public License as published
 by the Free Software Foundation, either version 3 of the License,
 or (at your option) any later version.

 GNUnet is distributed in the hope that it will be useful, but
 WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 Affero General Public License for more details.

 You should have received a copy of the GNU Affero General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * @file ats/gnunet-service-ats_plugins.c
 * @brief ats service plugin management
 * @author Matthias Wachs
 * @author Christian Grothoff
 */
#include "platform.h"
#include "gnunet_ats_plugin.h"
#include "gnunet-service-ats_connectivity.h"
#include "gnunet-service-ats_performance.h"
#include "gnunet-service-ats_preferences.h"
#include "gnunet-service-ats_plugins.h"
#include "gnunet-service-ats_reservations.h"
#include "gnunet-service-ats_scheduling.h"
#include "gnunet-service-ats_normalization.h"


/**
 * Solver handle.
 */
static struct GNUNET_ATS_SolverFunctions *sf;

/**
 * Solver environment.
 */
static struct GNUNET_ATS_PluginEnvironment env;

/**
 * Solver plugin name as string
 */
static char *plugin;


/**
 * The preference changed for a peer, update solver.
 *
 * @param peer the peer
 * @param kind the ATS kind
 * @param pref_rel the new relative preference value
 */
void
GAS_plugin_notify_preference_changed (const struct GNUNET_PeerIdentity *peer,
                                      enum GNUNET_ATS_PreferenceKind kind,
                                      double pref_rel)
{
  sf->s_pref (sf->cls,
              peer,
              kind,
              pref_rel);
}


/**
 * The relative value for a property changed.
 *
 * @param address the peer for which a property changed
 */
void
GAS_plugin_notify_property_changed (struct ATS_Address *address)
{
  sf->s_address_update_property (sf->cls,
                                 address);
}


/**
 * Solver information callback
 *
 * @param cls the closure
 * @param op the operation
 * @param status operation status
 * @param add additional information
 */
static void
solver_info_cb (void *cls,
		enum GAS_Solver_Operation op,
		enum GAS_Solver_Status status,
		enum GAS_Solver_Additional_Information add)
{
  const char *add_info;

  switch (add) {
    case GAS_INFO_NONE:
      add_info = "GAS_INFO_NONE";
      break;
    case GAS_INFO_FULL:
      add_info = "GAS_INFO_MLP_FULL";
      break;
    case GAS_INFO_UPDATED:
      add_info = "GAS_INFO_MLP_UPDATED";
      break;
    case GAS_INFO_PROP_ALL:
      add_info = "GAS_INFO_PROP_ALL";
      break;
    case GAS_INFO_PROP_SINGLE:
      add_info = "GAS_INFO_PROP_SINGLE";
      break;
    default:
      add_info = "INVALID";
      break;
  }
  switch (op)
  {
  case GAS_OP_SOLVE_START:
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "Solver notifies `%s' with result `%s' `%s'\n",
                "GAS_OP_SOLVE_START",
                (GAS_STAT_SUCCESS == status) ? "SUCCESS" : "FAIL",
                add_info);
    return;
  case GAS_OP_SOLVE_STOP:
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "Solver notifies `%s' with result `%s'\n",
                "GAS_OP_SOLVE_STOP",
                (GAS_STAT_SUCCESS == status) ? "SUCCESS" : "FAIL");
    return;
  case GAS_OP_SOLVE_SETUP_START:
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "Solver notifies `%s' with result `%s'\n",
                "GAS_OP_SOLVE_SETUP_START",
                (GAS_STAT_SUCCESS == status) ? "SUCCESS" : "FAIL");
    return;
  case GAS_OP_SOLVE_SETUP_STOP:
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "Solver notifies `%s' with result `%s'\n",
                "GAS_OP_SOLVE_SETUP_STOP",
                (GAS_STAT_SUCCESS == status) ? "SUCCESS" : "FAIL");
    return;
  case GAS_OP_SOLVE_MLP_LP_START:
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "Solver notifies `%s' with result `%s'\n",
                "GAS_OP_SOLVE_LP_START",
                (GAS_STAT_SUCCESS == status) ? "SUCCESS" : "FAIL");
    return;
  case GAS_OP_SOLVE_MLP_LP_STOP:
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "Solver notifies `%s' with result `%s'\n",
                "GAS_OP_SOLVE_LP_STOP",
                (GAS_STAT_SUCCESS == status) ? "SUCCESS" : "FAIL");
    return;
  case GAS_OP_SOLVE_MLP_MLP_START:
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "Solver notifies `%s' with result `%s'\n",
                "GAS_OP_SOLVE_MLP_START",
                (GAS_STAT_SUCCESS == status) ? "SUCCESS" : "FAIL");
    return;
  case GAS_OP_SOLVE_MLP_MLP_STOP:
    GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
               "Solver notifies `%s' with result `%s'\n",
               "GAS_OP_SOLVE_MLP_STOP",
               (GAS_STAT_SUCCESS == status) ? "SUCCESS" : "FAIL");
    return;
  case GAS_OP_SOLVE_UPDATE_NOTIFICATION_START:
    GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
               "Solver notifies `%s' with result `%s'\n",
               "GAS_OP_SOLVE_UPDATE_NOTIFICATION_START",
               (GAS_STAT_SUCCESS == status) ? "SUCCESS" : "FAIL");
    return;
  case GAS_OP_SOLVE_UPDATE_NOTIFICATION_STOP:
    GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
               "Solver notifies `%s' with result `%s'\n",
               "GAS_OP_SOLVE_UPDATE_NOTIFICATION_STOP",
               (GAS_STAT_SUCCESS == status) ? "SUCCESS" : "FAIL");
    return;
  default:
    GNUNET_break (0);
    break;
  }
}


/**
 * Callback for solver to notify about assignment changes
 *
 * @param cls NULL
 * @param address the address with changes
 */
static void
bandwidth_changed_cb (void *cls,
		      struct ATS_Address *address)
{
  long long diff_out;
  long long diff_in;

  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Bandwidth assignment changed for peer %s to %u/%u\n",
              GNUNET_i2s (&address->peer),
              (unsigned int) address->assigned_bw_in,
              (unsigned int) address->assigned_bw_out);
  GAS_reservations_set_bandwidth (&address->peer,
                                  GNUNET_BANDWIDTH_value_init (address->assigned_bw_in));
  /* Notify performance clients about changes to address */
  GAS_performance_notify_all_clients (&address->peer,
				      address->plugin,
				      address->addr,
				      address->addr_len,
				      address->active,
				      &address->properties,
                                      address->local_address_info,
				      GNUNET_BANDWIDTH_value_init (address->assigned_bw_out),
				      GNUNET_BANDWIDTH_value_init (address->assigned_bw_in));

  if ( (0 == address->assigned_bw_in) &&
       (0 == address->assigned_bw_out) )
  {
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "Telling transport to disconnect peer `%s'\n",
                GNUNET_i2s (&address->peer));

    /* Notify scheduling clients about suggestion */
    GAS_scheduling_transmit_address_suggestion (&address->peer,
                                                address->session_id,
                                                GNUNET_BANDWIDTH_ZERO,
                                                GNUNET_BANDWIDTH_ZERO);
    return;
  }

  /* Do bandwidth stability check */
  diff_out = llabs ((long long) address->assigned_bw_out -
                    (long long) address->last_notified_bw_out);
  diff_in = llabs ((long long) address->assigned_bw_in -
                   (long long) address->last_notified_bw_in);
  if ( (diff_out < htonl (GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT.value__)) &&
       (diff_in < htonl (GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT.value__)) )
  {
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "Bandwidth change too small, not notifying client\n");
    return;
  }

  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Sending bandwidth update for peer `%s': %u/%u\n",
              GNUNET_i2s (&address->peer),
              address->assigned_bw_out,
              address->assigned_bw_out);

  /* *Notify scheduling clients about suggestion */
  GAS_scheduling_transmit_address_suggestion (&address->peer,
                                              address->session_id,
                                              GNUNET_BANDWIDTH_value_init (address->assigned_bw_out),
                                              GNUNET_BANDWIDTH_value_init (address->assigned_bw_in));

  address->last_notified_bw_out = address->assigned_bw_out;
  address->last_notified_bw_in = address->assigned_bw_in;
}


/**
 * Convert quota from text to numeric value.
 *
 * @param quota_str the value found in the configuration
 * @param direction direction of the quota
 * @param network network the quota applies to
 * @return numeric quota value to use
 */
static unsigned long long
parse_quota (const char *quota_str,
             const char *direction,
             enum GNUNET_ATS_Network_Type network)
{
  int res;
  unsigned long long ret;

  res = GNUNET_NO;
  if (0 == strcmp (quota_str, GNUNET_ATS_MaxBandwidthString))
  {
    ret = GNUNET_ATS_MaxBandwidth;
    res = GNUNET_YES;
  }
  if ((GNUNET_NO == res) &&
      (GNUNET_OK ==
       GNUNET_STRINGS_fancy_size_to_bytes (quota_str,
                                           &ret)))
    res = GNUNET_YES;
  if ((GNUNET_NO == res) &&
      (1 ==
       sscanf (quota_str,
               "%llu",
               &ret)))
    res = GNUNET_YES;
  if (GNUNET_NO == res)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                _("Could not load %s quota for network `%s':  `%s', assigning default bandwidth %llu\n"),
                direction,
                GNUNET_ATS_print_network_type (network),
                quota_str,
                (unsigned long long) GNUNET_ATS_DefaultBandwidth);
    ret = GNUNET_ATS_DefaultBandwidth;
  }
  else
  {
    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
                _("%s quota configured for network `%s' is %llu\n"),
                direction,
                GNUNET_ATS_print_network_type (network),
                ret);
  }
  return ret;
}


/**
 * Load quota value from the configuration @a cfg for the
 * given network @a type and @a direction.
 *
 * @param cfg configuration to parse
 * @param type network type to parse for
 * @param direction traffic direction to parse for
 * @return quota to apply
 */
static unsigned long long
load_quota (const struct GNUNET_CONFIGURATION_Handle *cfg,
            enum GNUNET_ATS_Network_Type type,
            const char *direction)
{
  char *entry;
  char *quota_str;
  unsigned long long ret;

  GNUNET_asprintf (&entry,
                   "%s_QUOTA_%s",
                   GNUNET_ATS_print_network_type (type),
                   direction);
  if (GNUNET_OK ==
      GNUNET_CONFIGURATION_get_value_string (cfg,
                                             "ats",
                                             entry,
                                             &quota_str))
  {
    ret = parse_quota (quota_str,
                       direction,
                       type);
    GNUNET_free (quota_str);
  }
  else
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                _("No %s-quota configured for network `%s', assigning default bandwidth %llu\n"),
                direction,
                GNUNET_ATS_print_network_type (type),
                (unsigned long long) GNUNET_ATS_DefaultBandwidth);
    ret = GNUNET_ATS_DefaultBandwidth;
  }
  GNUNET_free (entry);
  return ret;
}


/**
 * Load quotas for networks from configuration
 *
 * @param cfg configuration handle
 * @param out_dest where to write outbound quotas
 * @param in_dest where to write inbound quotas
 * @param dest_length length of inbound and outbound arrays
 * @return number of networks loaded
 */
static unsigned int
load_quotas (const struct GNUNET_CONFIGURATION_Handle *cfg,
             unsigned long long *out_dest,
             unsigned long long *in_dest,
             int dest_length)
{
  unsigned int c;

  for (c = 0; (c < GNUNET_ATS_NetworkTypeCount) && (c < dest_length); c++)
  {
    in_dest[c] = load_quota (cfg,
                             c,
                             "out");
    out_dest[c] = load_quota (cfg,
                              c,
                              "in");
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "Loaded quota for network `%s' (in/out): %llu %llu\n",
                GNUNET_ATS_print_network_type (c),
                in_dest[c],
                out_dest[c]);
  }
  return c;
}


/**
 * Initialize plugins subsystem.
 *
 * @param cfg configuration to use
 * @return #GNUNET_OK on success, #GNUNET_SYSERR on error (failed to load
 *         solver plugin)
 */
int
GAS_plugin_init (const struct GNUNET_CONFIGURATION_Handle *cfg)
{
  char *mode_str;

  /* Figure out configured solution method */
  if (GNUNET_SYSERR ==
      GNUNET_CONFIGURATION_get_value_string (cfg,
                                             "ats",
                                             "MODE",
                                             &mode_str))
  {
    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                "No resource assignment method configured, using proportional approach\n");
    mode_str = GNUNET_strdup ("proportional");
  }
  env.cls = NULL;
  env.info_cb = &solver_info_cb;
  env.bandwidth_changed_cb = &bandwidth_changed_cb;
  env.get_preferences = &GAS_preference_get_by_peer;
  env.get_connectivity = &GAS_connectivity_has_peer;
  env.cfg = cfg;
  env.stats = GSA_stats;
  env.addresses = GSA_addresses;
  env.network_count = GNUNET_ATS_NetworkTypeCount;
  load_quotas (cfg,
               env.out_quota,
               env.in_quota,
               GNUNET_ATS_NetworkTypeCount);
  GNUNET_asprintf (&plugin,
                   "libgnunet_plugin_ats_%s",
                   mode_str);
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Initializing solver `%s'\n",
              mode_str);
  GNUNET_free (mode_str);
  if (NULL == (sf = GNUNET_PLUGIN_load (plugin, &env)))
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                _("Failed to initialize solver `%s'!\n"),
                plugin);
    return GNUNET_SYSERR;
  }
  return GNUNET_OK;
}


/**
 * Shutdown address subsystem.
 */
void
GAS_plugin_done ()
{
  GNUNET_PLUGIN_unload (plugin,
                        sf);
  sf = NULL;
  GNUNET_free (plugin);
  plugin = NULL;
}


/**
 * Tell the solver that the given address can now be used
 * for talking to the respective peer.
 *
 * @param new_address the new address
 */
void
GAS_plugin_new_address (struct ATS_Address *new_address)
{
  sf->s_add (sf->cls,
             new_address,
             new_address->properties.scope); /* FIXME: remove 3rd arg here! */
}


/**
 * Tell the solver that the given address is no longer valid
 * can cannot be used any longer.
 *
 * @param address address that was deleted
 */
void
GAS_plugin_delete_address (struct ATS_Address *address)
{
  sf->s_del (sf->cls,
             address);
}


/**
 * Tell the solver that the given client has expressed its
 * appreciation for the past performance of a given connection.
 *
 * @param application client providing the feedback
 * @param peer peer the feedback is about
 * @param scope timeframe the feedback applies to
 * @param kind performance property the feedback relates to
 * @param score_abs degree of the appreciation
 */
void
GAS_plugin_notify_feedback (struct GNUNET_SERVICE_Client *application,
                            const struct GNUNET_PeerIdentity *peer,
                            const struct GNUNET_TIME_Relative scope,
                            enum GNUNET_ATS_PreferenceKind kind,
                            float score_abs)
{
  sf->s_feedback (sf->cls,
                  application,
                  peer,
                  scope,
                  kind,
                  score_abs);
}


/**
 * Stop instant solving, there are many state updates
 * happening in bulk right now.
 */
void
GAS_plugin_solver_lock ()
{
  sf->s_bulk_start (sf->cls);
}


/**
 * Resume instant solving, we are done with the bulk state updates.
 */
void
GAS_plugin_solver_unlock ()
{
  sf->s_bulk_stop (sf->cls);
}


/**
 * Notify the plugin that a request to connect to
 * a particular peer was given to us.
 *
 * @param pid identity of peer we now care about
 */
void
GAS_plugin_request_connect_start (const struct GNUNET_PeerIdentity *pid)
{
  sf->s_get (sf->cls,
             pid);
}


/**
 * Notify the plugin that a request to connect to
 * a particular peer was dropped.
 *
 * @param pid identity of peer we care now less about
 */
void
GAS_plugin_request_connect_stop (const struct GNUNET_PeerIdentity *pid)
{
  sf->s_get_stop (sf->cls,
                  pid);
}


/* end of gnunet-service-ats_plugins.c */