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22 * @file ats/plugin_ats_proportional.c
23 * @brief ATS proportional solver
24 * @author Matthias Wachs
25 * @author Christian Grothoff
27 #include "plugin_ats_proportional.h"
29 #define LOG(kind,...) GNUNET_log_from (kind, "ats-proportional",__VA_ARGS__)
34 * NOTE: Do not change this documentation. This documentation is based
35 * on gnunet.org:/vcs/fsnsg/ats-paper.git/tech-doku/ats-tech-guide.tex
36 * use build_txt.sh to generate plaintext output
38 * ATS addresses : proportional solver
40 * The proportional solver ("proportional") distributes the available
41 * bandwidth fair over all the addresses influenced by the
42 * preference values. For each available network type an in- and
43 * outbound quota is configured and the bandwidth available in
44 * these networks is distributed over the addresses. The solver
45 * first assigns every addresses the minimum amount of bandwidth
46 * GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT and then distributes the
47 * remaining bandwidth available according to the preference
48 * values. For each peer only a single address gets bandwidth
49 * assigned and only one address marked as active. The most
50 * important functionality for the solver is implemented in: *
51 * find_address_it is an hashmap iterator returning the prefered
52 * address for an peer * update_quota_per_network distributes
53 * available bandwidth for a network over active addresses
55 * Changes to addresses automatically have an impact on the the
56 * bandwidth assigned to other addresses in the same network since
57 * the solver distributes the remaining bandwidth over the
58 * addresses in the network. When changes to the addresses occur,
59 * the solver first performs the changes, like adding or deleting
60 * addresses, and then updates bandwidth assignment for the
61 * affected network. Bandwidth assignment is only recalculated on
62 * demand when an address is requested by a client for a peer or
63 * when the addresses available have changed or an address changed
64 * the network it is located in. When the bandwidth assignment has
65 * changed the callback is called with the new bandwidth
66 * assignments. The bandwidth distribution for a network is
67 * recalculated due to: * address suggestion requests * address
68 * deletions * address switching networks during address update *
71 * 3.1 Data structures used
73 * For each ATS network (e.g. WAN, LAN, loopback) a struct Network
74 * is used to specify network related information as total adresses
75 * and active addresses in this network and the configured in- and
76 * outbound quota. Each network also contains a list of addresses
77 * added to the solver located in this network. The proportional
78 * solver uses the addresses' solver_information field to store the
79 * proportional network it belongs to for each address.
83 * When the proportional solver is initialized the solver creates a
84 * new solver handle and initializes the network structures with
85 * the quotas passed from addresses and returns the handle solver.
87 * 3.3 Adding an address
89 * When a new address is added to the solver using s_add, a lookup
90 * for the network for this address is done and the address is
91 * enqueued in in the linked list of the network.
93 * 3.4 Updating an address
95 * The main purpose of address updates is to update the ATS
96 * information for addresse selection. Important for the proportional
97 * solver is when an address switches network it is located
98 * in. This is common because addresses added by transport's
99 * validation mechanism are commonly located in
100 * GNUNET_ATS_NET_UNSPECIFIED. Addresses in validation are located
101 * in this network type and only if a connection is successful on
102 * return of payload data transport switches to the real network
103 * the address is located in. When an address changes networks it
104 * is first of all removed from the old network using the solver
105 * API function GAS_proportional_address_delete and the network in
106 * the address struct is updated. A lookup for the respective new
107 * proportional network is done and stored in the addresse's
108 * solver_information field. Next the address is re-added to the
109 * solver using the solver API function
110 * GAS_proportional_address_add. If the address was marked as in
111 * active, the solver checks if bandwidth is available in the
112 * network and if yes sets the address to active and updates the
113 * bandwidth distribution in this network. If no bandwidth is
114 * available it sets the bandwidth for this address to 0 and tries
115 * to suggest an alternative address. If an alternative address was
116 * found, addresses' callback is called for this address.
118 * 3.5 Deleting an address
120 * When an address is removed from the solver, it removes the
121 * respective address from the network and if the address was
122 * marked as active, it updates the bandwidth distribution for this
125 * 3.6 Requesting addresses
127 * When an address is requested for a peer the solver performs a
128 * lookup for the peer entry in addresses address hashmap and
129 * selects the best address. The selection of the most suitable
130 * address is done in the find_address_it hashmap iterator
131 * described in detail in section 3.7. If no address is returned,
132 * no address can be suggested at the moment. If the address
133 * returned is marked as active, the solver can return this
134 * address. If the address is not marked as active, the solver
135 * checks if another address belongign to this peer is marked as
136 * active and marks the address as inactive, updates the bandwidth
137 * for this address to 0, call the bandwidth changed callback for
138 * this address due to the change and updates quota assignment for
139 * the addresse's network. the now in-active address is belonging
140 * to. The solver marks the new address as active and updates the
141 * bandwidth assignment for this network.
143 * 3.7 Choosing addresses
145 * Choosing the best possible address for suggestion is done by
146 * iterating over all addresses of a peer stored in addresses'
147 * hashmap and using the hashmap iterator find_address_it to select
148 * the best available address. Several checks are done when an
149 * address is selected. First if this address is currently blocked
150 * by addresses from being suggested. An address is blocked for the
151 * duration of ATS_BLOCKING_DELTA when it is suggested to
152 * transport. Next it is checked if at least
153 * GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT bytes bandwidth is available
154 * in the addresse's network, because suggesting an address without
155 * bandwidth does not make sense. This also ensures that all active
156 * addresses in this network get at least the minimum amount of
157 * bandwidth assigned. In the next step the solver ensures that for
158 * tcp connections inbound connections are prefered over outbound
159 * connections. In the next stet the solver ensures that
160 * connections are prefered in the following order: * connections
161 * are already established and have bandwidth assigned *
162 * connections with a shorter distance * connectes have a shorter
165 * 3.8 Changing preferences
169 * During shutdown all network entries and aging processes are
170 * destroyed and freed.
175 * This solver assigns in and outbound bandwidth equally for all
176 * addresses in specific network type (WAN, LAN) based on configured
177 * in and outbound quota for this network.
179 * The solver is notified by addresses about changes to the addresses
180 * and recalculates the bandwith assigned if required. The solver
181 * notifies addresses by calling the GAS_bandwidth_changed_cb
189 * For each peer only a single is selected and marked as "active" in the address
194 * You have the networks WAN and LAN and quotas
195 * WAN_TOTAL_IN, WAN_TOTAL_OUT
196 * LAN_TOTAL_IN, LAN_TOTAL_OUT
198 * If you have x addresses in the network segment LAN, the quotas are
199 * QUOTA_PER_ADDRESS = LAN_TOTAL_OUT / x
201 * Quotas are automatically recalculated and reported back when addresses are
206 #define PROPORTIONALITY_FACTOR 2.0
209 * A handle for the proportional solver
211 struct GAS_PROPORTIONAL_Handle
213 struct GNUNET_ATS_PluginEnvironment *env;
218 struct GNUNET_STATISTICS_Handle *stats;
221 * Hashmap containing all valid addresses
223 struct GNUNET_CONTAINER_MultiPeerMap *addresses;
226 * Pending address requests
228 struct GNUNET_CONTAINER_MultiPeerMap *requests;
231 * Bandwidth changed callback
233 GAS_bandwidth_changed_cb bw_changed;
236 * Bandwidth changed callback cls
238 void *bw_changed_cls;
241 * ATS function to get preferences
243 GAS_get_preferences get_preferences;
246 * Closure for ATS function to get preferences
248 void *get_preferences_cls;
251 * ATS function to get properties
253 GAS_get_properties get_properties;
256 * Closure for ATS function to get properties
258 void *get_properties_cls;
266 * Number of changes while solver was locked
271 * Total number of addresses for solver
273 unsigned int total_addresses;
276 * Number of active addresses for solver
278 unsigned int active_addresses;
283 struct Network *network_entries;
288 unsigned int network_count;
291 * Proportionality factor
298 double stability_factor;
302 * Representation of a network
312 * Network description
317 * Total inbound quota
320 unsigned long long total_quota_in;
323 * Total outbound quota
326 unsigned long long total_quota_out;
329 * Number of active addresses for this network
331 unsigned int active_addresses;
334 * Number of total addresses for this network
336 unsigned int total_addresses;
339 * String for statistics total addresses
344 * String for statistics active addresses
348 struct AddressWrapper *head;
349 struct AddressWrapper *tail;
353 * Address information stored in the solver
355 struct AddressSolverInformation
357 struct Network *network;
363 unsigned long long calculated_quota_in_NBO;
369 unsigned long long calculated_quota_out_NBO;
375 * Wrapper for addresses to store them in network's linked list
377 struct AddressWrapper
382 struct AddressWrapper *next;
387 struct AddressWrapper *prev;
392 struct ATS_Address *addr;
396 * Important solver functions
397 * ---------------------------
401 libgnunet_plugin_ats_proportional_init (void *cls)
403 struct GNUNET_ATS_PluginEnvironment *env = cls;
404 struct GAS_PROPORTIONAL_Handle *s;
405 struct Network * cur;
406 char * net_str[GNUNET_ATS_NetworkTypeCount] = GNUNET_ATS_NetworkTypeString;
407 unsigned long long prop_factor;
408 unsigned long long stability_factor;
411 GNUNET_assert (NULL != env);
412 GNUNET_assert(NULL != env->cfg);
413 GNUNET_assert(NULL != env->bandwidth_changed_cb);
414 GNUNET_assert(NULL != env->get_preferences);
415 GNUNET_assert(NULL != env->get_property);
417 s = GNUNET_new (struct GAS_PROPORTIONAL_Handle);
419 env->sf.s_add = &GAS_proportional_address_add;
420 env->sf.s_address_update_property = &GAS_proportional_address_property_changed;
421 env->sf.s_address_update_session = &GAS_proportional_address_session_changed;
422 env->sf.s_address_update_inuse = &GAS_proportional_address_inuse_changed;
423 env->sf.s_address_update_network = &GAS_proportional_address_change_network;
424 env->sf.s_get = &GAS_proportional_get_preferred_address;
425 env->sf.s_get_stop = &GAS_proportional_stop_get_preferred_address;
426 env->sf.s_pref = &GAS_proportional_address_change_preference;
427 env->sf.s_feedback = &GAS_proportional_address_preference_feedback;
428 env->sf.s_del = &GAS_proportional_address_delete;
429 env->sf.s_bulk_start = &GAS_proportional_bulk_start;
430 env->sf.s_bulk_stop = &GAS_proportional_bulk_stop;
432 s->stats = (struct GNUNET_STATISTICS_Handle *) env->stats;
433 s->bw_changed = env->bandwidth_changed_cb;
434 s->bw_changed_cls = env->bw_changed_cb_cls;
435 s->get_preferences = env->get_preferences;
436 s->get_preferences_cls = env->get_preference_cls;
437 s->get_properties = env->get_property;
438 s->get_properties_cls = env->get_property_cls;
439 s->network_count = env->network_count;
440 s->network_entries = GNUNET_malloc (env->network_count * sizeof (struct Network));
443 s->active_addresses = 0;
444 s->total_addresses = 0;
445 s->bulk_lock = GNUNET_NO;
446 s->addresses = env->addresses;
447 s->requests = GNUNET_CONTAINER_multipeermap_create (10, GNUNET_NO);
449 if (GNUNET_SYSERR != GNUNET_CONFIGURATION_get_value_number(s->env->cfg, "ats",
450 "PROP_STABILITY_FACTOR", &stability_factor))
452 if ((stability_factor >= 100) && (stability_factor <= 200))
454 s->stability_factor = ((double) stability_factor) / 100;
459 s->stability_factor = PROP_STABILITY_FACTOR;
465 s->stability_factor = PROP_STABILITY_FACTOR;
467 LOG (GNUNET_ERROR_TYPE_INFO, "Using stability factor %.3f\n",
468 s->stability_factor);
470 if (GNUNET_SYSERR != GNUNET_CONFIGURATION_get_value_number(s->env->cfg, "ats",
471 "PROP_PROPORTIONALITY_FACTOR", &prop_factor))
473 if (prop_factor >= 100)
474 s->prop_factor = ((double) prop_factor) / 100;
478 s->prop_factor = PROPORTIONALITY_FACTOR;
482 s->prop_factor = PROPORTIONALITY_FACTOR;
483 LOG (GNUNET_ERROR_TYPE_INFO, "Using proportionality factor %.3f\n",
487 for (c = 0; c < env->network_count; c++)
489 cur = &s->network_entries[c];
490 cur->total_addresses = 0;
491 cur->active_addresses = 0;
492 cur->type = env->networks[c];
493 cur->total_quota_in = env->in_quota[c];
494 cur->total_quota_out = env->out_quota[c];
495 cur->desc = net_str[c];
496 GNUNET_asprintf (&cur->stat_total,
497 "# ATS addresses %s total", cur->desc);
498 GNUNET_asprintf (&cur->stat_active,
499 "# ATS active addresses %s total", cur->desc);
500 LOG (GNUNET_ERROR_TYPE_INFO, "Added network %u `%s' (%llu/%llu)\n",
501 c, cur->desc, cur->total_quota_in, cur->total_quota_out);
507 libgnunet_plugin_ats_proportional_done (void *cls)
509 struct GAS_PROPORTIONAL_Handle *s = cls;
510 struct AddressWrapper *cur;
511 struct AddressWrapper *next;
513 GNUNET_assert(s != NULL);
514 for (c = 0; c < s->network_count; c++)
516 if (s->network_entries[c].total_addresses > 0)
518 LOG(GNUNET_ERROR_TYPE_DEBUG,
519 "Had %u addresses for network `%s' not deleted during shutdown\n",
520 s->network_entries[c].total_addresses, s->network_entries[c].desc);
524 if (s->network_entries[c].active_addresses > 0)
526 LOG(GNUNET_ERROR_TYPE_DEBUG,
527 "Had %u active addresses for network `%s' not deleted during shutdown\n",
528 s->network_entries[c].active_addresses, s->network_entries[c].desc);
532 next = s->network_entries[c].head;
533 while (NULL != (cur = next))
536 GNUNET_CONTAINER_DLL_remove(s->network_entries[c].head,
537 s->network_entries[c].tail, cur);
538 GNUNET_free_non_null (cur->addr->solver_information);
541 GNUNET_free(s->network_entries[c].stat_total);
542 GNUNET_free(s->network_entries[c].stat_active);
544 if (s->total_addresses > 0)
546 LOG(GNUNET_ERROR_TYPE_DEBUG,
547 "Had %u addresses not deleted during shutdown\n", s->total_addresses);
550 if (s->active_addresses > 0)
552 LOG(GNUNET_ERROR_TYPE_DEBUG,
553 "Had %u active addresses not deleted during shutdown\n",
554 s->active_addresses);
557 GNUNET_free (s->network_entries);
558 GNUNET_CONTAINER_multipeermap_destroy (s->requests);
565 * Test if bandwidth is available in this network to add an additional address
567 * @param net the network type to update
568 * @return GNUNET_YES or GNUNET_NO
571 is_bandwidth_available_in_network (struct Network *net)
573 GNUNET_assert(NULL != net);
574 unsigned int na = net->active_addresses + 1;
575 uint32_t min_bw = ntohl (GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT.value__);
576 if (((net->total_quota_in / na) > min_bw)
577 && ((net->total_quota_out / na) > min_bw))
579 LOG(GNUNET_ERROR_TYPE_DEBUG,
580 "Enough bandwidth available for %u active addresses in network `%s'\n",
585 LOG(GNUNET_ERROR_TYPE_DEBUG,
586 "Not enough bandwidth available for %u active addresses in network `%s'\n",
592 bandwidth_changed (struct GAS_PROPORTIONAL_Handle *s)
594 if (GNUNET_YES == s->bulk_lock)
604 * Update bandwidth assigned to peers in this network
606 * @param s the solver handle
607 * @param net the network type to update
608 * @param address_except address excluded from notification, since we suggest
612 distribute_bandwidth (struct GAS_PROPORTIONAL_Handle *s,
613 struct Network *net, struct ATS_Address *address_except)
615 struct AddressSolverInformation *asi;
616 struct AddressWrapper *cur_address;
618 unsigned long long remaining_quota_in = 0;
619 unsigned long long quota_out_used = 0;
620 unsigned long long remaining_quota_out = 0;
621 unsigned long long quota_in_used = 0;
623 uint32_t min_bw = ntohl (GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT.value__);
624 double relative_peer_prefence;
625 double sum_relative_peer_prefences; /* Important: has to be double not float due to precision */
626 double cur_pref; /* Important: has to be double not float due to precision */
629 const double *peer_relative_prefs = NULL; /* Important: has to be double not float due to precision */
631 unsigned long long assigned_quota_in = 0;
632 unsigned long long assigned_quota_out = 0;
635 LOG(GNUNET_ERROR_TYPE_INFO,
636 "Recalculate quota for network type `%s' for %u addresses (in/out): %llu/%llu \n",
637 net->desc, net->active_addresses, net->total_quota_in,
638 net->total_quota_in);
640 if (net->active_addresses == 0)
642 return; /* no addresses to update */
646 * Assign every peer in network minimum Bandwidth
647 * Distribute bandwidth left according to preference
650 if ((net->active_addresses * min_bw) > net->total_quota_in)
655 if ((net->active_addresses * min_bw) > net->total_quota_out)
661 remaining_quota_in = net->total_quota_in - (net->active_addresses * min_bw);
662 remaining_quota_out = net->total_quota_out - (net->active_addresses * min_bw);
663 LOG(GNUNET_ERROR_TYPE_DEBUG, "Remaining bandwidth : (in/out): %llu/%llu \n",
664 remaining_quota_in, remaining_quota_out);
665 sum_relative_peer_prefences = 0.0;
667 /* Calculate sum of relative preference for active addresses in this network */
669 for (cur_address = net->head; NULL != cur_address; cur_address = cur_address->next)
671 if (GNUNET_YES != cur_address->addr->active)
674 GNUNET_assert( NULL != (peer_relative_prefs = s->get_preferences (s->get_preferences_cls,
675 &cur_address->addr->peer)));
676 relative_peer_prefence = 0.0;
677 relative_peer_prefence += peer_relative_prefs[GNUNET_ATS_PREFERENCE_BANDWIDTH];
678 sum_relative_peer_prefences += relative_peer_prefence;
682 GNUNET_assert (count_addresses == net->active_addresses);
684 LOG (GNUNET_ERROR_TYPE_INFO,
685 "Total relative preference %.3f for %u addresses in network %s\n",
686 sum_relative_peer_prefences, net->active_addresses, net->desc);
688 for (cur_address = net->head; NULL != cur_address; cur_address = cur_address->next)
690 if (GNUNET_YES == cur_address->addr->active)
692 GNUNET_assert( NULL != (peer_relative_prefs =
693 s->get_preferences (s->get_preferences_cls, &cur_address->addr->peer)));
695 cur_pref = peer_relative_prefs[GNUNET_ATS_PREFERENCE_BANDWIDTH];
696 total_weight = net->active_addresses +
697 s->prop_factor * sum_relative_peer_prefences;
698 peer_weight = (1.0 + (s->prop_factor * cur_pref));
700 assigned_quota_in = min_bw
701 + ((peer_weight / total_weight) * remaining_quota_in);
702 assigned_quota_out = min_bw
703 + ((peer_weight / total_weight) * remaining_quota_out);
705 LOG (GNUNET_ERROR_TYPE_INFO,
706 "New quota for peer `%s' with weight (cur/total) %.3f/%.3f (in/out): %llu / %llu\n",
707 GNUNET_i2s (&cur_address->addr->peer), peer_weight, total_weight,
708 assigned_quota_in, assigned_quota_out);
712 assigned_quota_in = 0;
713 assigned_quota_out = 0;
716 quota_in_used += assigned_quota_in;
717 quota_out_used += assigned_quota_out;
718 /* Prevent overflow due to rounding errors */
719 if (assigned_quota_in > UINT32_MAX)
720 assigned_quota_in = UINT32_MAX;
721 if (assigned_quota_out > UINT32_MAX)
722 assigned_quota_out = UINT32_MAX;
724 /* Compare to current bandwidth assigned */
725 asi = cur_address->addr->solver_information;
726 asi->calculated_quota_in_NBO = htonl (assigned_quota_in);
727 asi->calculated_quota_out_NBO = htonl (assigned_quota_out);
729 LOG(GNUNET_ERROR_TYPE_DEBUG,
730 "Total bandwidth assigned is (in/out): %llu /%llu\n", quota_in_used,
732 if (quota_out_used > net->total_quota_out + 1) /* +1 is required due to rounding errors */
734 LOG(GNUNET_ERROR_TYPE_ERROR,
735 "Total outbound bandwidth assigned is larger than allowed (used/allowed) for %u active addresses: %llu / %llu\n",
736 net->active_addresses, quota_out_used, net->total_quota_out);
738 if (quota_in_used > net->total_quota_in + 1) /* +1 is required due to rounding errors */
740 LOG(GNUNET_ERROR_TYPE_ERROR,
741 "Total inbound bandwidth assigned is larger than allowed (used/allowed) for %u active addresses: %llu / %llu\n",
742 net->active_addresses, quota_in_used, net->total_quota_in);
746 struct FindBestAddressCtx
748 struct GAS_PROPORTIONAL_Handle *s;
749 struct ATS_Address *best;
753 find_property_index (uint32_t type)
755 int existing_types[] = GNUNET_ATS_QualityProperties;
757 for (c = 0; c < GNUNET_ATS_QualityPropertiesCount; c++)
758 if (existing_types[c] == type)
760 return GNUNET_SYSERR;
764 * Find a "good" address to use for a peer by iterating over the addresses for this peer.
765 * If we already have an existing address, we stick to it.
766 * Otherwise, we pick by lowest distance and then by lowest latency.
768 * @param cls the 'struct ATS_Address**' where we store the result
770 * @param value another 'struct ATS_Address*' to consider using
771 * @return GNUNET_OK (continue to iterate)
774 find_best_address_it (void *cls,
775 const struct GNUNET_PeerIdentity *key,
778 struct FindBestAddressCtx *ctx = (struct FindBestAddressCtx *) cls;
779 struct ATS_Address *current = (struct ATS_Address *) value;
780 struct ATS_Address *current_best = (struct ATS_Address *) value;
781 struct GNUNET_TIME_Absolute now;
782 struct AddressSolverInformation *asi;
783 const double *norm_prop_cur;
784 const double *norm_prop_best;
786 double best_distance;
792 asi = current->solver_information;
793 now = GNUNET_TIME_absolute_get ();
795 if (current->blocked_until.abs_value_us
796 == GNUNET_TIME_absolute_max (now, current->blocked_until).abs_value_us)
798 /* This address is blocked for suggestion */
799 LOG(GNUNET_ERROR_TYPE_DEBUG, "Address %p blocked for suggestion for %s \n",
801 GNUNET_STRINGS_relative_time_to_string (GNUNET_TIME_absolute_get_difference (now, current->blocked_until), GNUNET_YES));
810 if (GNUNET_NO == is_bandwidth_available_in_network (asi->network))
811 return GNUNET_OK; /* There's no bandwidth available in this network */
813 if (NULL != ctx->best)
815 /* Compare current addresses with denominated 'best' address */
817 current_best = ctx->best;
818 if ((0 != ctx->best->addr_len) && (0 == current->addr_len))
820 /* saved address was an outbound address, but we have an inbound address */
821 current_best = current;
824 if (ctx->best->t_last_activity.abs_value_us < current->t_last_activity.abs_value_us)
826 /* Current address is newer */
827 current_best = current;
829 if (ctx->best->t_added.abs_value_us < current->t_added.abs_value_us)
831 /* Current address is newer */
832 current_best = current;
838 /* We do not have a 'best' address so take this address */
839 LOG (GNUNET_ERROR_TYPE_DEBUG, "Setting initial address %p\n", current);
840 current_best = current;
844 /* Now compare ATS information */
845 norm_prop_cur = ctx->s->get_properties (ctx->s->get_properties_cls,
846 (const struct ATS_Address *) current);
847 index = find_property_index (GNUNET_ATS_QUALITY_NET_DISTANCE);
848 cur_distance = norm_prop_cur[index];
849 index = find_property_index (GNUNET_ATS_QUALITY_NET_DELAY);
850 cur_delay = norm_prop_cur[index];
852 norm_prop_best = ctx->s->get_properties (ctx->s->get_properties_cls,
853 (const struct ATS_Address *) ctx->best);
854 index = find_property_index (GNUNET_ATS_QUALITY_NET_DISTANCE);
855 best_distance = norm_prop_best[index];
856 index = find_property_index (GNUNET_ATS_QUALITY_NET_DELAY);
857 best_delay = norm_prop_best[index];
859 /* user shorter distance */
862 if (cur_distance < best_distance)
865 if (GNUNET_NO == ctx->best->active)
867 current_best = current; /* Use current */
869 else if ((best_distance / cur_distance) > ctx->s->stability_factor)
871 /* Best and active address performs worse */
872 current_best = current;
877 /* Use current best */
878 current_best = ctx->best;
881 /* User connection with less delay */
882 if (cur_delay < best_delay)
885 if (GNUNET_NO == ctx->best->active)
887 current_best = current; /* Use current */
889 else if ((best_delay / cur_delay) > ctx->s->stability_factor)
891 /* Best and active address performs worse */
892 current_best = current;
901 /* Use current best */
902 current_best = ctx->best;
906 ctx->best = current_best;
911 get_best_address (struct GAS_PROPORTIONAL_Handle *s,
912 struct GNUNET_CONTAINER_MultiPeerMap *addresses,
913 const struct GNUNET_PeerIdentity *id)
915 struct FindBestAddressCtx fba_ctx;
919 GNUNET_CONTAINER_multipeermap_get_multiple (addresses, id,
920 &find_best_address_it, &fba_ctx);
927 * ---------------------------
930 propagate_bandwidth (struct GAS_PROPORTIONAL_Handle *s,
931 struct Network *net, struct ATS_Address *address_except)
933 struct AddressWrapper *cur;
934 struct AddressSolverInformation *asi;
935 for (cur = net->head; NULL != cur; cur = cur->next)
937 asi = cur->addr->solver_information;
938 if ( (cur->addr->assigned_bw_in.value__ != asi->calculated_quota_in_NBO) ||
939 (cur->addr->assigned_bw_out.value__ != asi->calculated_quota_out_NBO) )
941 cur->addr->assigned_bw_in.value__ = asi->calculated_quota_in_NBO;
942 cur->addr->assigned_bw_out.value__ = asi->calculated_quota_out_NBO;
944 /* Reset for next iteration */
945 asi->calculated_quota_in_NBO = htonl (0);
946 asi->calculated_quota_out_NBO = htonl (0);
948 LOG (GNUNET_ERROR_TYPE_DEBUG,
949 "Bandwidth for %s address %p for peer `%s' changed to %u/%u\n",
950 (GNUNET_NO == cur->addr->active) ? "inactive" : "active",
952 GNUNET_i2s (&cur->addr->peer),
953 ntohl (cur->addr->assigned_bw_in.value__),
954 ntohl (cur->addr->assigned_bw_out.value__ ));
956 /* Notify on change */
957 if ((GNUNET_YES == cur->addr->active) && (cur->addr != address_except))
958 s->bw_changed (s->bw_changed_cls, cur->addr);
964 * Distribibute bandwidth
966 * @param s the solver handle
967 * @param n the network, can be NULL for all network
968 * @param address_except do not notify for this address
971 distribute_bandwidth_in_network (struct GAS_PROPORTIONAL_Handle *s,
972 struct Network *n, struct ATS_Address *address_except)
974 if (GNUNET_YES == s->bulk_lock)
982 LOG (GNUNET_ERROR_TYPE_INFO,
983 "Redistributing bandwidth in network %s with %u active and %u total addresses\n",
984 GNUNET_ATS_print_network_type(n->type),
985 n->active_addresses, n->total_addresses);
987 if (NULL != s->env->info_cb)
988 s->env->info_cb(s->env->info_cb_cls, GAS_OP_SOLVE_START,
989 GAS_STAT_SUCCESS, GAS_INFO_PROP_SINGLE);
992 distribute_bandwidth(s, n, address_except);
994 if (NULL != s->env->info_cb)
995 s->env->info_cb(s->env->info_cb_cls, GAS_OP_SOLVE_STOP,
996 GAS_STAT_SUCCESS, GAS_INFO_PROP_SINGLE);
997 if (NULL != s->env->info_cb)
998 s->env->info_cb(s->env->info_cb_cls, GAS_OP_SOLVE_UPDATE_NOTIFICATION_START,
999 GAS_STAT_SUCCESS, GAS_INFO_PROP_SINGLE);
1001 /* Do propagation */
1002 propagate_bandwidth (s, n, address_except);
1004 if (NULL != s->env->info_cb)
1005 s->env->info_cb(s->env->info_cb_cls, GAS_OP_SOLVE_UPDATE_NOTIFICATION_STOP,
1006 GAS_STAT_SUCCESS, GAS_INFO_PROP_SINGLE);
1011 if (NULL != s->env->info_cb)
1012 s->env->info_cb(s->env->info_cb_cls, GAS_OP_SOLVE_START,
1013 GAS_STAT_SUCCESS, GAS_INFO_PROP_ALL);
1014 for (i = 0; i < s->network_count; i++)
1017 distribute_bandwidth(s, &s->network_entries[i], NULL);
1020 if (NULL != s->env->info_cb)
1021 s->env->info_cb(s->env->info_cb_cls, GAS_OP_SOLVE_STOP,
1022 GAS_STAT_SUCCESS, GAS_INFO_PROP_ALL);
1023 if (NULL != s->env->info_cb)
1024 s->env->info_cb(s->env->info_cb_cls, GAS_OP_SOLVE_UPDATE_NOTIFICATION_START,
1025 GAS_STAT_SUCCESS, GAS_INFO_PROP_ALL);
1026 for (i = 0; i < s->network_count; i++)
1028 /* Do propagation */
1029 propagate_bandwidth(s, &s->network_entries[i], address_except);
1031 if (NULL != s->env->info_cb)
1032 s->env->info_cb(s->env->info_cb_cls, GAS_OP_SOLVE_UPDATE_NOTIFICATION_STOP,
1033 GAS_STAT_SUCCESS, GAS_INFO_PROP_ALL);
1038 * Lookup network struct by type
1040 * @param s the solver handle
1041 * @param type the network type
1042 * @return the network struct
1044 static struct Network *
1045 get_network (struct GAS_PROPORTIONAL_Handle *s, uint32_t type)
1048 for (c = 0; c < s->network_count; c++)
1050 if (s->network_entries[c].type == type)
1051 return &s->network_entries[c];
1057 * Hashmap Iterator to find current active address for peer
1059 * @param cls last active address
1060 * @param key peer's key
1061 * @param value address to check
1062 * @return #GNUNET_NO on double active address else #GNUNET_YES;
1065 get_active_address_it (void *cls,
1066 const struct GNUNET_PeerIdentity *key,
1069 struct ATS_Address **dest = cls;
1070 struct ATS_Address *aa = (struct ATS_Address *) value;
1072 if (GNUNET_YES == aa->active)
1075 if (NULL != (*dest))
1077 /* should never happen */
1078 LOG(GNUNET_ERROR_TYPE_ERROR, "Multiple active addresses for peer `%s'\n",
1079 GNUNET_i2s (&aa->peer));
1089 * Find current active address for peer
1091 * @param solver the solver handle
1092 * @param addresses the address set
1093 * @param peer the peer
1094 * @return active address or NULL
1096 static struct ATS_Address *
1097 get_active_address (void *solver,
1098 const struct GNUNET_CONTAINER_MultiPeerMap * addresses,
1099 const struct GNUNET_PeerIdentity *peer)
1101 struct ATS_Address * dest = NULL;
1103 GNUNET_CONTAINER_multipeermap_get_multiple (addresses, peer,
1104 &get_active_address_it, &dest);
1110 addresse_increment (struct GAS_PROPORTIONAL_Handle *s, struct Network *net,
1111 int total, int active)
1113 if (GNUNET_YES == total)
1115 s->total_addresses++;
1116 net->total_addresses++;
1117 GNUNET_STATISTICS_update (s->stats, "# ATS addresses total", 1, GNUNET_NO);
1118 GNUNET_STATISTICS_update (s->stats, net->stat_total, 1, GNUNET_NO);
1120 if (GNUNET_YES == active)
1122 net->active_addresses++;
1123 s->active_addresses++;
1124 GNUNET_STATISTICS_update (s->stats, "# ATS active addresses total", 1,
1126 GNUNET_STATISTICS_update (s->stats, net->stat_active, 1, GNUNET_NO);
1133 addresse_decrement (struct GAS_PROPORTIONAL_Handle *s, struct Network *net,
1134 int total, int active)
1136 int res = GNUNET_OK;
1137 if (GNUNET_YES == total)
1139 if (s->total_addresses < 1)
1142 res = GNUNET_SYSERR;
1146 s->total_addresses--;
1147 GNUNET_STATISTICS_update (s->stats, "# ATS addresses total", -1,
1150 if (net->total_addresses < 1)
1153 res = GNUNET_SYSERR;
1157 net->total_addresses--;
1158 GNUNET_STATISTICS_update (s->stats, net->stat_total, -1, GNUNET_NO);
1162 if (GNUNET_YES == active)
1164 if (net->active_addresses < 1)
1167 res = GNUNET_SYSERR;
1171 net->active_addresses--;
1172 GNUNET_STATISTICS_update (s->stats, net->stat_active, -1, GNUNET_NO);
1174 if (s->active_addresses < 1)
1177 res = GNUNET_SYSERR;
1181 s->active_addresses--;
1182 GNUNET_STATISTICS_update (s->stats, "# ATS addresses total", -1,
1190 address_eq (struct ATS_Address *a, struct ATS_Address *b)
1192 GNUNET_assert (NULL != a);
1193 GNUNET_assert (NULL != b);
1194 if (0 != strcmp(a->plugin, b->plugin))
1196 if (a->addr_len != b->addr_len)
1198 if (0 != memcmp (a->addr, b->addr, b->addr_len))
1200 if (a->session_id != b->session_id)
1206 * Solver API functions
1207 * ---------------------------
1211 * Changes the preferences for a peer in the problem
1213 * @param solver the solver handle
1214 * @param peer the peer to change the preference for
1215 * @param kind the kind to change the preference
1216 * @param pref_rel the normalized preference value for this kind over all clients
1219 GAS_proportional_address_change_preference (void *solver,
1220 const struct GNUNET_PeerIdentity *peer,
1221 enum GNUNET_ATS_PreferenceKind kind,
1224 struct GAS_PROPORTIONAL_Handle *s = solver;
1225 struct ATS_Address *best_address;
1226 struct ATS_Address *active_address;
1228 GNUNET_assert(NULL != solver);
1229 GNUNET_assert(NULL != peer);
1231 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (s->requests, peer))
1232 return; /* Peer is not requested */
1234 /* This peer is requested, find best address */
1235 active_address = get_active_address(s, s->addresses, peer);
1236 best_address = (struct ATS_Address *) GAS_proportional_get_preferred_address (s, peer);
1238 if (NULL == best_address)
1239 return; /* No address to suggest */
1241 if ((NULL == active_address) || ((NULL != active_address) &&
1242 (GNUNET_NO == address_eq (active_address, best_address))))
1244 /* We now have an active address */
1245 s->bw_changed (s->bw_changed_cls, best_address);
1249 /* Preferences changed, we have to recalculate bandwidth distribution */
1250 distribute_bandwidth_in_network (s, NULL, NULL);
1255 * Get application feedback for a peer
1257 * @param solver the solver handle
1258 * @param application the application
1259 * @param peer the peer to change the preference for
1260 * @param scope the time interval for this feedback: [now - scope .. now]
1261 * @param kind the kind to change the preference
1262 * @param score the score
1265 GAS_proportional_address_preference_feedback (void *solver, void *application,
1266 const struct GNUNET_PeerIdentity *peer,
1267 const struct GNUNET_TIME_Relative scope,
1268 enum GNUNET_ATS_PreferenceKind kind, double score)
1270 struct GAS_PROPORTIONAL_Handle *s = solver;
1271 GNUNET_assert(NULL != solver);
1272 GNUNET_assert(NULL != peer);
1274 GNUNET_assert(NULL != s);
1279 * Get the preferred address for a specific peer
1283 * @param solver the solver handle
1284 * @param peer the identity of the peer
1286 const struct ATS_Address *
1287 GAS_proportional_get_preferred_address (void *solver,
1288 const struct GNUNET_PeerIdentity *peer)
1290 struct GAS_PROPORTIONAL_Handle *s = solver;
1291 struct Network *net_prev;
1292 struct Network *net_cur;
1293 struct ATS_Address *prev;
1294 struct ATS_Address *best_address;
1295 struct AddressSolverInformation *asi;
1296 struct AddressSolverInformation *asi_prev;
1298 GNUNET_assert(s != NULL);
1299 GNUNET_assert(peer != NULL);
1301 /* Add to list of pending requests */
1302 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (s->requests, peer))
1305 GNUNET_OK == GNUNET_CONTAINER_multipeermap_put (s->requests, peer, NULL,
1306 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
1309 /* Find best address */
1310 best_address = get_best_address (s,s->addresses, peer);
1311 if (NULL == best_address)
1313 LOG (GNUNET_ERROR_TYPE_INFO, "Cannot suggest address for peer `%s'\n",
1318 LOG (GNUNET_ERROR_TYPE_INFO, "Suggesting %s address %p for peer `%s'\n",
1319 (GNUNET_NO == best_address->active) ? "inactive" : "active", best_address,
1322 asi = best_address->solver_information;
1323 net_cur = asi->network ;
1324 if (GNUNET_YES == best_address->active)
1326 /* This address was selected previously, so no need to update quotas */
1327 return best_address;
1330 /* This address was not active, so we have to:
1332 * - mark previous active address as not active
1333 * - update quota for previous address network
1334 * - update quota for this address network
1336 prev = get_active_address (s, s->addresses, peer);
1339 asi_prev = prev->solver_information;
1340 net_prev = asi_prev->network;
1341 prev->active = GNUNET_NO; /* No active any longer */
1342 prev->assigned_bw_in = BANDWIDTH_ZERO; /* no bandwidth assigned */
1343 prev->assigned_bw_out = BANDWIDTH_ZERO; /* no bandwidth assigned */
1345 if (GNUNET_SYSERR == addresse_decrement (s, net_prev, GNUNET_NO, GNUNET_YES))
1348 /* Update network of previous address */
1349 distribute_bandwidth_in_network (s, net_prev, NULL);
1352 if (GNUNET_NO == (is_bandwidth_available_in_network (net_cur)))
1354 /* This should never happen, because we checked when finding best address */
1359 /* Mark address as active */
1360 best_address->active = GNUNET_YES;
1361 addresse_increment (s, net_cur, GNUNET_NO, GNUNET_YES);
1363 /* Distribute bandwidth */
1364 distribute_bandwidth_in_network (s, net_cur, best_address);
1365 return best_address;
1369 * Stop notifying about address and bandwidth changes for this peer
1371 * @param solver the solver handle
1372 * @param peer the peer
1375 GAS_proportional_stop_get_preferred_address (void *solver,
1376 const struct GNUNET_PeerIdentity *peer)
1378 struct GAS_PROPORTIONAL_Handle *s = solver;
1379 struct ATS_Address *cur;
1380 struct AddressSolverInformation *asi;
1381 struct Network *cur_net;
1383 if (GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (s->requests, peer))
1384 GNUNET_assert (GNUNET_OK == GNUNET_CONTAINER_multipeermap_remove (s->requests,
1387 cur = get_active_address (s, s->addresses, peer);
1390 LOG(GNUNET_ERROR_TYPE_INFO,
1391 "Disabling %s address %p for peer `%s'\n",
1392 (GNUNET_NO == cur->active) ? "inactive" : "active", cur,
1393 GNUNET_i2s (&cur->peer));
1395 /* Disabling current address */
1396 asi = cur->solver_information;
1397 cur_net = asi->network ;
1398 cur->active = GNUNET_NO; /* No active any longer */
1399 cur->assigned_bw_in = BANDWIDTH_ZERO; /* no bandwidth assigned */
1400 cur->assigned_bw_out = BANDWIDTH_ZERO; /* no bandwidth assigned */
1402 if (GNUNET_SYSERR == addresse_decrement (s, cur_net, GNUNET_NO, GNUNET_YES))
1405 distribute_bandwidth_in_network (s, cur_net, NULL );
1411 * Remove an address from the solver
1413 * @param solver the solver handle
1414 * @param address the address to remove
1415 * @param session_only delete only session not whole address
1418 GAS_proportional_address_delete (void *solver, struct ATS_Address *address,
1421 struct GAS_PROPORTIONAL_Handle *s = solver;
1422 struct Network *net;
1423 struct AddressWrapper *aw;
1424 struct AddressSolverInformation *asi;
1425 const struct ATS_Address *new_address;
1428 /* Remove an adress completely, we have to:
1429 * - Remove from specific network
1430 * - Decrease number of total addresses
1432 * - decrease number of active addreses
1435 asi = address->solver_information;
1444 if (GNUNET_NO == session_only)
1446 LOG(GNUNET_ERROR_TYPE_INFO,
1447 "Deleting %s address %p for peer `%s' from network `%s' (total: %u/ active: %u)\n",
1448 (GNUNET_NO == address->active) ? "inactive" : "active", address,
1449 GNUNET_i2s (&address->peer), net->desc, net->total_addresses,
1450 net->active_addresses);
1452 /* Remove address */
1453 addresse_decrement (s, net, GNUNET_YES, GNUNET_NO);
1454 for (aw = net->head; NULL != aw; aw = aw->next)
1456 if (aw->addr == address)
1464 GNUNET_CONTAINER_DLL_remove(net->head, net->tail, aw);
1469 /* Remove session only: remove if active and update */
1470 LOG(GNUNET_ERROR_TYPE_INFO,
1471 "Deleting %s session %p for peer `%s' from network `%s' (total: %u/ active: %u)\n",
1472 (GNUNET_NO == address->active) ? "inactive" : "active", address,
1473 GNUNET_i2s (&address->peer), net->desc, net->total_addresses,
1474 net->active_addresses);
1477 if (GNUNET_YES == address->active)
1479 /* Address was active, remove from network and update quotas*/
1480 address->active = GNUNET_NO;
1481 address->assigned_bw_in = BANDWIDTH_ZERO;
1482 address->assigned_bw_out = BANDWIDTH_ZERO;
1483 asi->calculated_quota_in_NBO = htonl (0);
1484 asi->calculated_quota_out_NBO = htonl (0);
1486 if (GNUNET_SYSERR == addresse_decrement (s, net, GNUNET_NO, GNUNET_YES))
1488 distribute_bandwidth_in_network (s, net, NULL);
1490 if (NULL == (new_address = GAS_proportional_get_preferred_address (s, &address->peer)))
1492 /* No alternative address found, disconnect peer */
1493 s->bw_changed (s->bw_changed_cls, address);
1497 /* We found an alternative, notify about it */
1498 s->bw_changed (s->bw_changed_cls, (struct ATS_Address *) new_address);
1501 if (GNUNET_NO == session_only)
1503 GNUNET_free_non_null (address->solver_information);
1504 address->solver_information = NULL;
1507 LOG(GNUNET_ERROR_TYPE_INFO,
1508 "After deleting address now total %u and active %u addresses in network `%s'\n",
1509 net->total_addresses, net->active_addresses, net->desc);
1514 * Start a bulk operation
1516 * @param solver the solver
1519 GAS_proportional_bulk_start (void *solver)
1521 LOG(GNUNET_ERROR_TYPE_DEBUG, "Locking solver for bulk operation ...\n");
1522 struct GAS_PROPORTIONAL_Handle *s = (struct GAS_PROPORTIONAL_Handle *) solver;
1524 GNUNET_assert(NULL != solver);
1530 * Bulk operation done
1533 GAS_proportional_bulk_stop (void *solver)
1535 LOG(GNUNET_ERROR_TYPE_DEBUG, "Unlocking solver from bulk operation ...\n");
1537 struct GAS_PROPORTIONAL_Handle *s = (struct GAS_PROPORTIONAL_Handle *) solver;
1538 GNUNET_assert(NULL != solver);
1540 if (s->bulk_lock < 1)
1546 if ((0 == s->bulk_lock) && (0 < s->bulk_requests))
1548 LOG(GNUNET_ERROR_TYPE_DEBUG, "No lock pending, recalculating\n");
1549 distribute_bandwidth_in_network (s, NULL, NULL);
1550 s->bulk_requests = 0;
1556 * Add a new single address to a network
1558 * @param solver the solver Handle
1559 * @param address the address to add
1560 * @param network network type of this address
1563 GAS_proportional_address_add (void *solver, struct ATS_Address *address,
1567 * Transport properties for this address have changed
1569 * @param solver solver handle
1570 * @param address the address
1571 * @param type the ATSI type in HBO
1572 * @param abs_value the absolute value of the property
1573 * @param rel_value the normalized value
1576 GAS_proportional_address_property_changed (void *solver,
1577 struct ATS_Address *address, uint32_t type, uint32_t abs_value,
1580 struct GAS_PROPORTIONAL_Handle *s;
1582 struct AddressSolverInformation *asi;
1583 struct ATS_Address *best_address;
1584 struct ATS_Address *active_address;
1586 GNUNET_assert(NULL != solver);
1587 GNUNET_assert(NULL != address);
1589 s = (struct GAS_PROPORTIONAL_Handle *) solver;
1590 asi = address->solver_information;
1604 LOG(GNUNET_ERROR_TYPE_INFO,
1605 "Property `%s' for peer `%s' address %p changed to %.2f \n",
1606 GNUNET_ATS_print_property_type (type), GNUNET_i2s (&address->peer),
1607 address, rel_value);
1609 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (s->requests, &address->peer))
1610 return; /* Peer is not requested */
1612 /* This peer is requested, find active and best address */
1613 active_address = get_active_address(s, s->addresses, &address->peer);
1614 best_address = (struct ATS_Address *) GAS_proportional_get_preferred_address (s, &address->peer);
1616 if (NULL == best_address)
1617 return; /* No address to suggest */
1619 if ((NULL != active_address) && GNUNET_YES == address_eq (active_address, best_address))
1621 /* We kept the active address, just redistribute */
1622 distribute_bandwidth_in_network (s, n, NULL);
1626 if ((NULL == active_address) || ((NULL != active_address) &&
1627 (GNUNET_NO == address_eq (active_address, best_address))))
1629 /* We switched active addresses */
1630 s->bw_changed (s->bw_changed_cls, (struct ATS_Address *) best_address);
1635 * Transport session for this address has changed
1637 * NOTE: values in addresses are already updated
1639 * @param solver solver handle
1640 * @param address the address
1641 * @param cur_session the current session
1642 * @param new_session the new session
1645 GAS_proportional_address_session_changed (void *solver,
1646 struct ATS_Address *address, uint32_t cur_session, uint32_t new_session)
1648 struct GAS_PROPORTIONAL_Handle *s = solver;
1649 struct ATS_Address *best_address;
1650 struct ATS_Address *active_address;
1651 struct AddressSolverInformation *asi;
1652 struct Network *net_cur;
1654 s = (struct GAS_PROPORTIONAL_Handle *) solver;
1655 if (cur_session != new_session)
1657 LOG(GNUNET_ERROR_TYPE_DEBUG, "Session changed from %u to %u\n", cur_session,
1661 if (NULL == address->solver_information)
1667 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (s->requests, &address->peer))
1668 return; /* Peer is not requested */
1670 /* This peer is requested, find active and best address */
1671 active_address = get_active_address(s, s->addresses, &address->peer);
1672 best_address = (struct ATS_Address *) GAS_proportional_get_preferred_address (s, &address->peer);
1674 asi = active_address->solver_information;
1681 net_cur = asi->network ;
1683 if (NULL == best_address)
1684 return; /* No address to suggest */
1686 if ((NULL != active_address) && GNUNET_YES == address_eq (active_address, best_address))
1688 /* We kept the active address, just redistribute */
1689 distribute_bandwidth_in_network (s, net_cur, NULL);
1693 if ((NULL == active_address) || ((NULL != active_address) &&
1694 (GNUNET_NO == address_eq (active_address, best_address))))
1696 /* We switched active addresses */
1697 s->bw_changed (s->bw_changed_cls, (struct ATS_Address *) best_address);
1702 * Usage for this address has changed
1704 * NOTE: values in addresses are already updated
1706 * @param solver solver handle
1707 * @param address the address
1708 * @param in_use usage state
1711 GAS_proportional_address_inuse_changed (void *solver,
1712 struct ATS_Address *address, int in_use)
1714 LOG(GNUNET_ERROR_TYPE_DEBUG, "Usage changed to %s\n",
1715 (GNUNET_YES == in_use) ? "USED" : "UNUSED");
1719 * Network scope for this address has changed
1721 * NOTE: values in addresses are already updated
1723 * @param solver solver handle
1724 * @param address the address
1725 * @param current_network the current network
1726 * @param new_network the new network
1729 GAS_proportional_address_change_network (void *solver,
1730 struct ATS_Address *address, uint32_t current_network, uint32_t new_network)
1732 struct GAS_PROPORTIONAL_Handle *s = (struct GAS_PROPORTIONAL_Handle *) solver;
1733 struct AddressSolverInformation *asi;
1734 int save_active = GNUNET_NO;
1736 struct Network *new_net = NULL;
1738 if (current_network == new_network)
1744 asi = address->solver_information;
1751 /* Network changed */
1752 LOG(GNUNET_ERROR_TYPE_DEBUG,
1753 "Network type changed, moving %s address from `%s' to `%s'\n",
1754 (GNUNET_YES == address->active) ? "active" : "inactive",
1755 GNUNET_ATS_print_network_type (current_network),
1756 GNUNET_ATS_print_network_type (new_network));
1758 save_active = address->active;
1760 /* Disable and assign no bandwidth */
1761 address->active = GNUNET_NO;
1762 address->assigned_bw_in = BANDWIDTH_ZERO; /* no bandwidth assigned */
1763 address->assigned_bw_out = BANDWIDTH_ZERO; /* no bandwidth assigned */
1765 /* Remove from old network */
1766 GAS_proportional_address_delete (solver, address, GNUNET_NO);
1768 /* Set new network type */
1769 if (NULL == (new_net = get_network (solver, new_network)))
1771 /* Address changed to invalid network... */
1772 LOG(GNUNET_ERROR_TYPE_ERROR,
1773 _("Invalid network type `%u' `%s': Disconnect!\n"), new_network,
1774 GNUNET_ATS_print_network_type (new_network));
1776 /* Find new address to suggest since no bandwidth in network*/
1777 if (NULL == GAS_proportional_get_preferred_address (s, &address->peer))
1779 /* No alternative address found, disconnect peer */
1780 s->bw_changed (s->bw_changed_cls, address);
1785 /* Add to new network and update*/
1786 asi->network = new_net;
1787 GAS_proportional_address_add (solver, address, new_network);
1788 if (GNUNET_YES == save_active)
1790 /* check if bandwidth available in new network */
1791 if (GNUNET_YES == (is_bandwidth_available_in_network (new_net)))
1793 /* Assign bandwidth to updated address */
1794 address->active = GNUNET_YES;
1795 addresse_increment (s, new_net, GNUNET_NO, GNUNET_YES);
1796 distribute_bandwidth_in_network (solver, new_net, NULL);
1800 LOG(GNUNET_ERROR_TYPE_DEBUG,
1801 "Not enough bandwidth in new network, suggesting alternative address ..\n");
1802 /* Find new address to suggest since no bandwidth in network*/
1803 if (NULL == GAS_proportional_get_preferred_address (s, &address->peer))
1805 /* No alternative address found, disconnect peer */
1806 s->bw_changed (s->bw_changed_cls, address);
1813 * Add a new single address to a network
1815 * @param solver the solver Handle
1816 * @param address the address to add
1817 * @param network network type of this address
1820 GAS_proportional_address_add (void *solver, struct ATS_Address *address,
1823 struct GAS_PROPORTIONAL_Handle *s = solver;
1824 struct Network *net = NULL;
1825 struct AddressWrapper *aw = NULL;
1826 struct AddressSolverInformation *asi;
1827 struct ATS_Address *best_address;
1828 struct ATS_Address *active_address;
1830 GNUNET_assert(NULL != s);
1831 net = get_network (s, network);
1836 LOG(GNUNET_ERROR_TYPE_ERROR,
1837 "Unknown network %u `%s' for new address %p for peer `%s'\n",
1838 network, GNUNET_ATS_print_network_type(network),
1839 address, GNUNET_i2s(&address->peer));
1844 aw = GNUNET_new (struct AddressWrapper);
1846 GNUNET_CONTAINER_DLL_insert(net->head, net->tail, aw);
1847 addresse_increment (s, net, GNUNET_YES, GNUNET_NO);
1849 asi = GNUNET_new (struct AddressSolverInformation);
1851 asi->calculated_quota_in_NBO = htonl (0);
1852 asi->calculated_quota_out_NBO = htonl (0);
1853 aw->addr->solver_information = asi;
1855 LOG(GNUNET_ERROR_TYPE_INFO,
1856 "Adding new address %p for peer `%s', now total %u and active %u addresses in network `%s'\n",
1857 address, GNUNET_i2s(&address->peer), net->total_addresses, net->active_addresses, net->desc);
1859 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (s->requests, &address->peer))
1860 return; /* Peer is not requested */
1862 /* This peer is requested, find best address */
1863 active_address = get_active_address(s, s->addresses, &address->peer);
1864 best_address = (struct ATS_Address *) GAS_proportional_get_preferred_address (s, &address->peer);
1866 if (NULL == best_address)
1867 return; /* No address to suggest */
1869 if ((NULL == active_address)
1870 || ((NULL != active_address)
1871 && (GNUNET_NO == address_eq (active_address, best_address))))
1873 /* We now have an active address or the active address changed */
1874 s->bw_changed (s->bw_changed_cls, (struct ATS_Address *) best_address);
1879 /* end of plugin_ats_proportional.c */