2 This file is part of GNUnet.
3 (C) 2011 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file ats/gnunet-service-ats_normalization.c
23 * @brief ats service address: management of ATS properties and preferences normalization
24 * @author Matthias Wachs
25 * @author Christian Grothoff
28 #include "gnunet_ats_service.h"
29 #include "gnunet-service-ats_addresses.h"
30 #include "gnunet-service-ats_normalization.h"
32 #define LOG(kind,...) GNUNET_log_from (kind, "ats-normalization",__VA_ARGS__)
37 struct PreferenceClient
42 struct PreferenceClient *prev;
48 struct PreferenceClient *next;
56 * Array of sum of absolute preferences for this client
58 double f_abs_sum[GNUNET_ATS_PreferenceCount];
61 * Array of sum of relative preferences for this client
63 double f_rel_sum[GNUNET_ATS_PreferenceCount];
66 * List of peer preferences for this client
72 struct PreferencePeer *p_head;
77 struct PreferencePeer *p_tail;
88 struct PreferencePeer *next;
93 struct PreferencePeer *prev;
98 struct PreferenceClient *client;
103 struct GNUNET_PeerIdentity id;
106 * Absolute preference values for all preference types
108 double f_abs[GNUNET_ATS_PreferenceCount];
111 * Relative preference values for all preference types
113 double f_rel[GNUNET_ATS_PreferenceCount];
116 * Absolute point of time of next aging process
118 struct GNUNET_TIME_Absolute next_aging[GNUNET_ATS_PreferenceCount];
122 * Relative preferences for a peer
127 * Relative preference values
129 double f_rel[GNUNET_ATS_PreferenceCount];
134 struct GNUNET_PeerIdentity id;
138 * Quality Normalization
148 struct Property properties[GNUNET_ATS_QualityPropertiesCount];
152 * Callback to call on changing preference values
154 static GAS_Normalization_preference_changed_cb pref_changed_cb;
157 * Closure for callback to call on changing preference values
159 static void *pref_changed_cb_cls;
162 * Callback to call on changing property values
164 GAS_Normalization_property_changed_cb prop_ch_cb;
167 * Closure for callback to call on changing property values
169 void *prop_ch_cb_cls;
172 * Hashmap to store peer information for preference normalization
174 static struct GNUNET_CONTAINER_MultiPeerMap *preference_peers;
177 * Hashmap to store peer information for property normalization
178 * FIXME: this map is not used!
180 static struct GNUNET_CONTAINER_MultiPeerMap *property_peers;
183 * Clients in DLL: head
185 static struct PreferenceClient *pc_head;
188 * Clients in DLL: tail
190 static struct PreferenceClient *pc_tail;
195 static struct PeerRelative defvalues;
197 static struct GNUNET_SCHEDULER_Task * aging_task;
200 * Application Preference Normalization
207 * @param kind the kind
208 * @param rp the relative peer struct
209 * @return the new relative preference
212 update_relative_values_for_peer (const struct GNUNET_PeerIdentity *id,
213 enum GNUNET_ATS_PreferenceKind kind, struct PeerRelative *rp)
215 struct PreferenceClient *c_cur;
216 struct PreferencePeer *p_cur;
220 unsigned int peer_count;
226 /* For all clients */
227 for (c_cur = pc_head; NULL != c_cur; c_cur = c_cur->next)
229 /* For peer entries with this id */
230 for (p_cur = c_cur->p_head; NULL != p_cur; p_cur = p_cur->next)
232 f_rel_sum += p_cur->f_rel[kind];
233 if (0 == memcmp (id, &p_cur->id, sizeof(struct GNUNET_PeerIdentity)))
236 f_rel_total += p_cur->f_rel[kind];
242 LOG (GNUNET_ERROR_TYPE_DEBUG,
243 "%u clients have a total relative preference for peer `%s' `%s' of %.3f and for %s in total %.3f\n",
244 peer_count, GNUNET_i2s (id),
245 GNUNET_ATS_print_preference_type (kind),
247 GNUNET_ATS_print_preference_type (kind),
250 /* Find entry for the peer containing relative values in the hashmap */
253 backup = rp->f_rel[kind];
255 rp->f_rel[kind] = f_rel_total / f_rel_sum;
258 /* No client had any preferences for this type and any peer */
259 rp->f_rel[kind] = DEFAULT_REL_PREFERENCE;
261 if ((backup != rp->f_rel[kind]) && (NULL != pref_changed_cb))
263 pref_changed_cb (pref_changed_cb_cls, &rp->id, kind, rp->f_rel[kind]);
269 * Recalculate preference for a specific ATS property
271 * @param c the preference client
272 * @param kind the preference kind
276 recalculate_relative_preferences (struct PreferenceClient *c, enum GNUNET_ATS_PreferenceKind kind)
278 struct PreferencePeer *p_cur;
280 /* For this client: sum of absolute preference values for this preference */
281 c->f_abs_sum[kind] = 0.0;
282 /* For this client: sum of relative preference values for this preference
284 * Note: this value should also be 1.0, but:
285 * if no preferences exist due to aging, this value can be 0.0
286 * and the client can be removed */
287 c->f_rel_sum[kind] = 0.0;
289 for (p_cur = c->p_head; NULL != p_cur; p_cur = p_cur->next)
290 c->f_abs_sum[kind] += p_cur->f_abs[kind];
291 LOG (GNUNET_ERROR_TYPE_DEBUG,
292 "Client %p has sum of total preferences for %s of %.3f\n",
293 c->client, GNUNET_ATS_print_preference_type (kind), c->f_abs_sum[kind]);
295 /* For all peers: calculate relative preference */
296 for (p_cur = c->p_head; NULL != p_cur; p_cur = p_cur->next)
298 /* Calculate relative preference for specific kind */
300 /* Every application has a preference for each peer between
301 * [0 .. 1] in relative values
302 * and [0 .. inf] in absolute values */
303 p_cur->f_rel[kind] = p_cur->f_abs[kind] / c->f_abs_sum[kind];
304 c->f_rel_sum[kind] += p_cur->f_rel[kind];
306 LOG (GNUNET_ERROR_TYPE_DEBUG,
307 "Client %p has relative preference for %s for peer `%s' of %.3f\n",
309 GNUNET_ATS_print_preference_type (kind),
310 GNUNET_i2s (&p_cur->id),
317 * Update the absolute preference value for a peer
318 * @param c the client
320 * @param kind the preference kind
321 * @param score_abs the absolute value
322 * @return the new relative preference value
325 update_abs_preference (struct PreferenceClient *c, struct PreferencePeer *p,
326 enum GNUNET_ATS_PreferenceKind kind, float score_abs)
328 double score = score_abs;
330 /* Update preference value according to type */
333 case GNUNET_ATS_PREFERENCE_BANDWIDTH:
334 case GNUNET_ATS_PREFERENCE_LATENCY:
335 p->f_abs[kind] = score;
336 /* p->f_abs[kind] = (p->f_abs[kind] + score) / 2; */
337 p->next_aging[kind] = GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
338 PREF_AGING_INTERVAL);
340 case GNUNET_ATS_PREFERENCE_END:
347 static int update_iterator (void *cls,
348 const struct GNUNET_PeerIdentity *key,
351 enum GNUNET_ATS_PreferenceKind *kind = cls;
352 update_relative_values_for_peer (key, (*kind), (struct PeerRelative *) value);
357 run_preference_update (struct PreferenceClient *c_cur,
358 struct PreferencePeer *p_cur,enum GNUNET_ATS_PreferenceKind kind,
363 /* Update relative value */
364 old_value = p_cur->f_rel[kind];
365 recalculate_relative_preferences (c_cur, kind);
366 if (p_cur->f_rel[kind] == old_value)
369 /* Relative preference value changed, recalculate for all peers */
370 GNUNET_CONTAINER_multipeermap_iterate (preference_peers, &update_iterator, &kind);
374 * Reduce absolute preferences since they got old
376 * @param cls the PreferencePeer
380 preference_aging (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
382 struct PreferencePeer *p;
383 struct PreferenceClient *cur_client;
385 int values_to_update;
389 values_to_update = 0;
392 for (cur_client = pc_head; NULL != cur_client; cur_client = cur_client->next)
394 for (p = cur_client->p_head; NULL != p; p = p->next)
396 /* Aging absolute values: */
397 for (i = 0; i < GNUNET_ATS_PreferenceCount; i++)
400 == GNUNET_TIME_absolute_get_remaining (p->next_aging[i]).rel_value_us)
402 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
403 "Aging preference for peer `%s'\n", GNUNET_i2s (&p->id));
404 backup = p->f_abs[i];
405 if (p->f_abs[i] > DEFAULT_ABS_PREFERENCE)
406 p->f_abs[i] *= PREF_AGING_FACTOR;
408 if (p->f_abs[i] <= DEFAULT_ABS_PREFERENCE + PREF_EPSILON)
409 p->f_abs[i] = DEFAULT_ABS_PREFERENCE;
411 if ( (p->f_abs[i] != DEFAULT_ABS_PREFERENCE) &&
412 (backup != p->f_abs[i]) )
414 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
415 "Aged preference for peer `%s' from %.3f to %.3f\n",
416 GNUNET_i2s (&p->id), backup, p->f_abs[i]);
418 run_preference_update(cur_client, p, i, p->f_abs[i]);
420 p->next_aging[i] = GNUNET_TIME_absolute_add (
421 GNUNET_TIME_absolute_get (), PREF_AGING_INTERVAL);
429 if (values_to_update > 0)
431 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
432 "Rescheduling aging task due to %u elements to age\n",
434 aging_task = GNUNET_SCHEDULER_add_delayed (PREF_AGING_INTERVAL,
435 &preference_aging, NULL );
438 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
439 "No values to age left, not rescheduling aging task\n");
444 * Normalize an updated preference value
446 * @param client the client with this preference
447 * @param peer the peer to change the preference for
448 * @param kind the kind to change the preference
449 * @param score_abs the normalized score
452 GAS_normalization_normalize_preference (void *client,
453 const struct GNUNET_PeerIdentity *peer,
454 enum GNUNET_ATS_PreferenceKind kind,
457 struct PreferenceClient *c_cur;
458 struct PreferencePeer *p_cur;
459 struct PeerRelative *r_cur;
463 GNUNET_assert(NULL != client);
464 GNUNET_assert(NULL != peer);
466 LOG (GNUNET_ERROR_TYPE_DEBUG,
467 "Client %p changes preference for peer `%s' for `%s' to %.2f\n",
470 GNUNET_ATS_print_preference_type (kind),
473 if (kind >= GNUNET_ATS_PreferenceCount)
479 /* Find preference client */
480 for (c_cur = pc_head; NULL != c_cur; c_cur = c_cur->next)
482 if (client == c_cur->client)
485 /* Not found: create new preference client */
488 c_cur = GNUNET_new (struct PreferenceClient);
489 c_cur->client = client;
490 for (i = 0; i < GNUNET_ATS_PreferenceCount; i++)
492 c_cur->f_abs_sum[i] = DEFAULT_ABS_PREFERENCE;
493 c_cur->f_rel_sum[i] = DEFAULT_REL_PREFERENCE;
496 GNUNET_CONTAINER_DLL_insert(pc_head, pc_tail, c_cur);
497 LOG (GNUNET_ERROR_TYPE_DEBUG, "Adding new client %p \n", c_cur);
500 /* Find entry for peer */
501 for (p_cur = c_cur->p_head; NULL != p_cur; p_cur = p_cur->next)
502 if (0 == memcmp (&p_cur->id, peer, sizeof(p_cur->id)))
505 /* Not found: create new peer entry */
508 p_cur = GNUNET_new (struct PreferencePeer);
509 p_cur->client = c_cur;
511 for (i = 0; i < GNUNET_ATS_PreferenceCount; i++)
513 /* Default value per peer absolute preference for a preference: 0 */
514 p_cur->f_abs[i] = DEFAULT_ABS_PREFERENCE;
515 /* Default value per peer relative preference for a quality: 1.0 */
516 p_cur->f_rel[i] = DEFAULT_REL_PREFERENCE;
517 p_cur->next_aging[i] = GNUNET_TIME_UNIT_FOREVER_ABS;
519 LOG (GNUNET_ERROR_TYPE_DEBUG, "Adding new peer %p for client %p \n",
521 GNUNET_CONTAINER_DLL_insert(c_cur->p_head, c_cur->p_tail, p_cur);
524 /* Create struct for peer */
525 if (NULL == GNUNET_CONTAINER_multipeermap_get (preference_peers, peer))
527 r_cur = GNUNET_new (struct PeerRelative);
529 for (i = 0; i < GNUNET_ATS_PreferenceCount; i++)
530 r_cur->f_rel[i] = DEFAULT_REL_PREFERENCE;
532 GNUNET_OK == GNUNET_CONTAINER_multipeermap_put (preference_peers,
533 &r_cur->id, r_cur, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
536 /* Update absolute value */
537 old_value = p_cur->f_abs[kind];
538 update_abs_preference (c_cur, p_cur, kind, score_abs);
539 if (p_cur->f_abs[kind] == old_value)
542 run_preference_update (c_cur, p_cur, kind, score_abs);
544 /* Start aging task */
545 if (NULL == aging_task)
546 aging_task = GNUNET_SCHEDULER_add_delayed (PREF_AGING_INTERVAL,
547 &preference_aging, NULL );
552 * Get the normalized preference values for a specific peer or
553 * the default values if
556 * @return pointer to the values, can be indexed with GNUNET_ATS_PreferenceKind,
557 * default preferences if peer does not exist
560 GAS_normalization_get_preferences_by_peer (const struct GNUNET_PeerIdentity *id)
562 GNUNET_assert(NULL != preference_peers);
563 GNUNET_assert(NULL != id);
565 struct PeerRelative *rp;
566 if (NULL == (rp = GNUNET_CONTAINER_multipeermap_get (preference_peers, id)))
568 return defvalues.f_rel;
574 * Get the normalized preference values for a specific client and peer
576 * @param client client
577 * @param peer the peer
578 * @param pref the preference type
582 GAS_normalization_get_preferences_by_client (const void *client,
583 const struct GNUNET_PeerIdentity *peer,
584 enum GNUNET_ATS_PreferenceKind pref)
586 struct PreferenceClient *c_cur;
587 struct PreferencePeer *p_cur;
589 /* Find preference client */
590 for (c_cur = pc_head; NULL != c_cur; c_cur = c_cur->next)
592 if (client == c_cur->client)
598 for (p_cur = c_cur->p_head; NULL != p_cur; p_cur = p_cur->next)
600 if (0 == memcmp (peer, &p_cur->id, sizeof (struct GNUNET_PeerIdentity)))
604 return DEFAULT_REL_PREFERENCE; /* Not found, return default */
606 return p_cur->f_rel[pref];
610 * Get the normalized properties values for a specific peer or
611 * the default values if
613 * @param address the address
614 * @return pointer to the values, can be indexed with GNUNET_ATS_PreferenceKind,
615 * default preferences if peer does not exist
618 GAS_normalization_get_properties (struct ATS_Address *address)
620 static double norm_values[GNUNET_ATS_QualityPropertiesCount];
623 GNUNET_assert(NULL != address);
625 for (i = 0; i < GNUNET_ATS_QualityPropertiesCount; i++)
627 if ((address->atsin[i].norm >= 1.0) && (address->atsin[i].norm <= 2.0))
628 norm_values[i] = address->atsin[i].norm;
630 norm_values[i] = DEFAULT_REL_QUALITY;
636 * Normalize a specific ATS type with the values in queue
637 * @param address the address
638 * @param atsi the ats information
639 * @return the new average or GNUNET_ATS_VALUE_UNDEFINED
643 property_average (struct ATS_Address *address,
644 const struct GNUNET_ATS_Information *atsi)
646 struct GAS_NormalizationInfo *ni;
647 uint32_t current_type;
648 uint32_t current_val;
654 unsigned int props[] = GNUNET_ATS_QualityProperties;
656 /* Average the values of this property */
657 current_type = ntohl (atsi->type);
658 current_val = ntohl (atsi->value);
660 for (c1 = 0; c1 < GNUNET_ATS_QualityPropertiesCount; c1++)
662 if (current_type == props[c1])
665 if (c1 == GNUNET_ATS_QualityPropertiesCount)
668 return GNUNET_ATS_VALUE_UNDEFINED;
672 ni = &address->atsin[index];
673 ni->atsi_abs[ni->avg_queue_index] = current_val;
674 ni->avg_queue_index++;
675 if (GAS_normalization_queue_length == ni->avg_queue_index)
676 ni->avg_queue_index = 0;
680 for (c1 = 0; c1 < GAS_normalization_queue_length; c1++)
682 if (GNUNET_ATS_VALUE_UNDEFINED != ni->atsi_abs[c1])
685 if (GNUNET_ATS_VALUE_UNDEFINED > (sum + ni->atsi_abs[c1]))
686 sum += ni->atsi_abs[c1];
689 sum = GNUNET_ATS_VALUE_UNDEFINED - 1;
694 GNUNET_assert(0 != count);
696 LOG(GNUNET_ERROR_TYPE_DEBUG,
697 "New average of `%s' created by adding %u from %u elements: %u\n",
698 GNUNET_ATS_print_property_type (current_type), current_val, count, res,
712 find_min_max_it (void *cls, const struct GNUNET_PeerIdentity *h, void *k)
714 struct FindMinMaxCtx *find_res = cls;
715 struct ATS_Address *a = k;
717 if (a->atsin[find_res->p->prop_type].avg > find_res->max)
718 find_res->max = a->atsin[find_res->p->prop_type].avg;
720 if (a->atsin[find_res->p->prop_type].avg < find_res->min)
721 find_res->min = a->atsin[find_res->p->prop_type].avg;
727 normalize_address (void *cls, const struct GNUNET_PeerIdentity *h, void *k)
729 struct Property *p = cls;
730 struct ATS_Address *address = k;
735 backup = address->atsin[p->prop_type].norm;
736 avg_value = address->atsin[p->prop_type].avg;
737 delta = p->max - p->min;
738 /* max - 2 * min + avg_value / max - min */
740 address->atsin[p->prop_type].norm = (delta + (avg_value - p->min)) / (delta);
742 address->atsin[p->prop_type].norm = DEFAULT_REL_QUALITY;
744 if (backup == address->atsin[p->prop_type].norm)
747 LOG(GNUNET_ERROR_TYPE_DEBUG,
748 "Normalize `%s' address %p's '%s' with value %u to range [%u..%u] = %.3f\n",
749 GNUNET_i2s (&address->peer), address,
750 GNUNET_ATS_print_property_type (p->atsi_type),
751 address->atsin[p->prop_type].avg, p->min, p->max,
752 address->atsin[p->prop_type].norm);
754 if (NULL != prop_ch_cb)
755 prop_ch_cb (prop_ch_cb_cls, address, p->atsi_type,
756 address->atsin[p->prop_type].norm);
762 * Normalize avg_value to a range of values between [1.0, 2.0]
763 * based on min max values currently known.
765 * @param addresses the address hashmap
766 * @param p the property
767 * @param address the address
768 * @param avg_value the value to normalize
771 property_normalize (struct GNUNET_CONTAINER_MultiPeerMap *addresses,
772 struct Property *p, struct ATS_Address *address, uint32_t avg_value)
774 struct FindMinMaxCtx find_ctx;
780 find_ctx.min = UINT32_MAX;
781 addr_count = GNUNET_CONTAINER_multipeermap_iterate (addresses,
782 &find_min_max_it, &find_ctx);
789 limits_changed = GNUNET_NO;
790 if (find_ctx.max != p->max)
792 LOG(GNUNET_ERROR_TYPE_DEBUG,
793 "Normalizing %s: new maximum %u -> recalculate all values\n",
794 GNUNET_ATS_print_property_type (p->atsi_type), find_ctx.max);
795 p->max = find_ctx.max;
796 limits_changed = GNUNET_YES;
799 if ((find_ctx.min != p->min) && (find_ctx.min < p->max))
801 LOG(GNUNET_ERROR_TYPE_DEBUG,
802 "Normalizing %s: new minimum %u -> recalculate all values\n",
803 GNUNET_ATS_print_property_type (p->atsi_type), find_ctx.min,
805 p->min = find_ctx.min;
806 limits_changed = GNUNET_YES;
808 else if (find_ctx.min == p->max)
810 /* Only one value, so minimum has to be 0 */
814 /* Normalize the values of this property */
815 if (GNUNET_NO == limits_changed)
817 /* normalize just this address */
818 normalize_address (p, &address->peer, address);
823 /* limits changed, normalize all addresses */
824 GNUNET_CONTAINER_multipeermap_iterate (addresses, &normalize_address, p);
830 * Update and normalize atsi performance information
832 * @param addresses hashmap containing all addresses
833 * @param address the address to update
834 * @param atsi the array of performance information
835 * @param atsi_count the number of atsi information in the array
838 GAS_normalization_normalize_property (
839 struct GNUNET_CONTAINER_MultiPeerMap *addresses,
840 struct ATS_Address *address, const struct GNUNET_ATS_Information *atsi,
843 struct Property *cur_prop;
846 uint32_t current_type;
847 uint32_t current_val;
848 unsigned int existing_properties[] = GNUNET_ATS_QualityProperties;
850 GNUNET_assert(NULL != address);
851 GNUNET_assert(NULL != atsi);
853 LOG(GNUNET_ERROR_TYPE_DEBUG, "Updating %u elements for peer `%s'\n",
854 atsi_count, GNUNET_i2s (&address->peer));
856 for (c1 = 0; c1 < atsi_count; c1++)
858 current_type = ntohl (atsi[c1].type);
860 for (c2 = 0; c2 < GNUNET_ATS_QualityPropertiesCount; c2++)
862 /* Check if type is valid */
863 if (current_type == existing_properties[c2])
866 if (GNUNET_ATS_QualityPropertiesCount == c2)
868 /* Invalid property, continue with next element */
872 current_val = property_average (address, &atsi[c1]);
873 if (GNUNET_ATS_VALUE_UNDEFINED == current_val)
881 cur_prop = &properties[c2];
882 property_normalize (addresses, cur_prop, address, current_val);
887 free_client (struct PreferenceClient *pc)
889 struct PreferencePeer *next_p;
890 struct PreferencePeer *p;
892 while (NULL != (p = next_p))
895 GNUNET_CONTAINER_DLL_remove(pc->p_head, pc->p_tail, p);
902 * A performance client disconnected
904 * @param client the client
908 GAS_normalization_preference_client_disconnect (void *client)
910 struct PreferenceClient *c_cur;
911 /* Find preference client */
913 for (c_cur = pc_head; NULL != c_cur; c_cur = c_cur->next)
915 if (client == c_cur->client)
921 GNUNET_CONTAINER_DLL_remove(pc_head, pc_tail, c_cur);
926 * Start the normalization component
928 * @param pref_ch_cb callback to call on relative preference changing
929 * @param pref_ch_cb_cls cls for the preference callback
930 * @param property_ch_cb callback to call on relative property changing
931 * @param property_ch_cb_cls cls for the property callback
934 GAS_normalization_start (GAS_Normalization_preference_changed_cb pref_ch_cb,
935 void *pref_ch_cb_cls, GAS_Normalization_property_changed_cb property_ch_cb,
936 void *property_ch_cb_cls)
940 preference_peers = GNUNET_CONTAINER_multipeermap_create (10, GNUNET_NO);
941 property_peers = GNUNET_CONTAINER_multipeermap_create (10, GNUNET_NO);
942 unsigned int existing_properties[] = GNUNET_ATS_QualityProperties;
944 for (c1 = 0; c1 < GNUNET_ATS_QualityPropertiesCount; c1++)
946 properties[c1].prop_type = c1;
947 properties[c1].atsi_type = existing_properties[c1];
948 properties[c1].min = 0;
949 properties[c1].max = 0;
952 pref_changed_cb = pref_ch_cb;
953 pref_changed_cb_cls = pref_ch_cb_cls;
954 prop_ch_cb = property_ch_cb;
955 prop_ch_cb_cls = pref_ch_cb_cls;
960 for (i = 0; i < GNUNET_ATS_PreferenceCount; i++)
961 defvalues.f_rel[i] = DEFAULT_REL_PREFERENCE;
971 * @param value RelativePeer
972 * @return #GNUNET_OK to continue
975 free_peer (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
977 struct PeerRelative *rp = value;
979 == GNUNET_CONTAINER_multipeermap_remove (preference_peers, key, value))
987 * Stop the normalization component and free all items
990 GAS_normalization_stop ()
992 struct PreferenceClient *pc;
993 struct PreferenceClient *next_pc;
995 if (NULL != aging_task)
997 GNUNET_SCHEDULER_cancel (aging_task);
1002 while (NULL != (pc = next_pc))
1005 GNUNET_CONTAINER_DLL_remove(pc_head, pc_tail, pc);
1009 GNUNET_CONTAINER_multipeermap_iterate (preference_peers, &free_peer, NULL );
1010 GNUNET_CONTAINER_multipeermap_destroy (preference_peers);
1011 GNUNET_CONTAINER_multipeermap_destroy (property_peers);
1015 /* end of gnunet-service-ats_normalization.c */