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/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;
372 * When was this address activated
374 struct GNUNET_TIME_Absolute activated;
379 * Wrapper for addresses to store them in network's linked list
381 struct AddressWrapper
386 struct AddressWrapper *next;
391 struct AddressWrapper *prev;
396 struct ATS_Address *addr;
400 * Important solver functions
401 * ---------------------------
405 libgnunet_plugin_ats_proportional_init (void *cls)
407 struct GNUNET_ATS_PluginEnvironment *env = cls;
408 struct GAS_PROPORTIONAL_Handle *s;
409 struct Network * cur;
410 char * net_str[GNUNET_ATS_NetworkTypeCount] = GNUNET_ATS_NetworkTypeString;
414 GNUNET_assert (NULL != env);
415 GNUNET_assert(NULL != env->cfg);
416 GNUNET_assert(NULL != env->bandwidth_changed_cb);
417 GNUNET_assert(NULL != env->get_preferences);
418 GNUNET_assert(NULL != env->get_property);
420 s = GNUNET_new (struct GAS_PROPORTIONAL_Handle);
422 env->sf.s_add = &GAS_proportional_address_add;
423 env->sf.s_address_update_property = &GAS_proportional_address_property_changed;
424 env->sf.s_address_update_session = &GAS_proportional_address_session_changed;
425 env->sf.s_address_update_inuse = &GAS_proportional_address_inuse_changed;
426 env->sf.s_address_update_network = &GAS_proportional_address_change_network;
427 env->sf.s_get = &GAS_proportional_get_preferred_address;
428 env->sf.s_get_stop = &GAS_proportional_stop_get_preferred_address;
429 env->sf.s_pref = &GAS_proportional_address_change_preference;
430 env->sf.s_feedback = &GAS_proportional_address_preference_feedback;
431 env->sf.s_del = &GAS_proportional_address_delete;
432 env->sf.s_bulk_start = &GAS_proportional_bulk_start;
433 env->sf.s_bulk_stop = &GAS_proportional_bulk_stop;
435 s->stats = (struct GNUNET_STATISTICS_Handle *) env->stats;
436 s->bw_changed = env->bandwidth_changed_cb;
437 s->bw_changed_cls = env->bw_changed_cb_cls;
438 s->get_preferences = env->get_preferences;
439 s->get_preferences_cls = env->get_preference_cls;
440 s->get_properties = env->get_property;
441 s->get_properties_cls = env->get_property_cls;
442 s->network_count = env->network_count;
443 s->network_entries = GNUNET_malloc (env->network_count * sizeof (struct Network));
446 s->active_addresses = 0;
447 s->total_addresses = 0;
448 s->bulk_lock = GNUNET_NO;
449 s->addresses = env->addresses;
450 s->requests = GNUNET_CONTAINER_multipeermap_create (10, GNUNET_NO);
452 s->stability_factor = PROP_STABILITY_FACTOR;
453 if (GNUNET_SYSERR != GNUNET_CONFIGURATION_get_value_float (env->cfg, "ats",
454 "PROP_STABILITY_FACTOR", &f_tmp))
456 if ((f_tmp < 1.0) || (f_tmp > 2.0))
458 LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid %s configuration %f \n"),
459 "PROP_STABILITY_FACTOR", f_tmp);
463 s->stability_factor = f_tmp;
464 LOG (GNUNET_ERROR_TYPE_INFO, "Using %s of %.3f\n",
465 "PROP_STABILITY_FACTOR", f_tmp);
469 s->prop_factor = PROPORTIONALITY_FACTOR;
470 if (GNUNET_SYSERR != GNUNET_CONFIGURATION_get_value_float (env->cfg, "ats",
471 "PROP_STABILITY_FACTOR", &f_tmp))
475 LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid %s configuration %f \n"),
476 "PROP_PROPORTIONALITY_FACTOR", f_tmp);
480 s->prop_factor = f_tmp;
481 LOG (GNUNET_ERROR_TYPE_INFO, "Using %s of %.3f\n",
482 "PROP_PROPORTIONALITY_FACTOR", f_tmp);
486 for (c = 0; c < env->network_count; c++)
488 cur = &s->network_entries[c];
489 cur->total_addresses = 0;
490 cur->active_addresses = 0;
491 cur->type = env->networks[c];
492 cur->total_quota_in = env->in_quota[c];
493 cur->total_quota_out = env->out_quota[c];
494 cur->desc = net_str[c];
495 GNUNET_asprintf (&cur->stat_total,
496 "# ATS addresses %s total", cur->desc);
497 GNUNET_asprintf (&cur->stat_active,
498 "# ATS active addresses %s total", cur->desc);
499 LOG (GNUNET_ERROR_TYPE_INFO, "Added network %u `%s' (%llu/%llu)\n",
500 c, cur->desc, cur->total_quota_in, cur->total_quota_out);
506 libgnunet_plugin_ats_proportional_done (void *cls)
508 struct GAS_PROPORTIONAL_Handle *s = cls;
509 struct AddressWrapper *cur;
510 struct AddressWrapper *next;
512 GNUNET_assert(s != NULL);
513 for (c = 0; c < s->network_count; c++)
515 if (s->network_entries[c].total_addresses > 0)
517 LOG(GNUNET_ERROR_TYPE_DEBUG,
518 "Had %u addresses for network `%s' not deleted during shutdown\n",
519 s->network_entries[c].total_addresses, s->network_entries[c].desc);
523 if (s->network_entries[c].active_addresses > 0)
525 LOG(GNUNET_ERROR_TYPE_DEBUG,
526 "Had %u active addresses for network `%s' not deleted during shutdown\n",
527 s->network_entries[c].active_addresses, s->network_entries[c].desc);
531 next = s->network_entries[c].head;
532 while (NULL != (cur = next))
535 GNUNET_CONTAINER_DLL_remove(s->network_entries[c].head,
536 s->network_entries[c].tail, cur);
537 GNUNET_free_non_null (cur->addr->solver_information);
540 GNUNET_free(s->network_entries[c].stat_total);
541 GNUNET_free(s->network_entries[c].stat_active);
543 if (s->total_addresses > 0)
545 LOG(GNUNET_ERROR_TYPE_DEBUG,
546 "Had %u addresses not deleted during shutdown\n", s->total_addresses);
549 if (s->active_addresses > 0)
551 LOG(GNUNET_ERROR_TYPE_DEBUG,
552 "Had %u active addresses not deleted during shutdown\n",
553 s->active_addresses);
556 GNUNET_free (s->network_entries);
557 GNUNET_CONTAINER_multipeermap_destroy (s->requests);
564 * Test if bandwidth is available in this network to add an additional address
566 * @param net the network type to update
567 * @return GNUNET_YES or GNUNET_NO
570 is_bandwidth_available_in_network (struct Network *net)
572 GNUNET_assert(NULL != net);
573 unsigned int na = net->active_addresses + 1;
574 uint32_t min_bw = ntohl (GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT.value__);
575 if (((net->total_quota_in / na) > min_bw)
576 && ((net->total_quota_out / na) > min_bw))
578 LOG(GNUNET_ERROR_TYPE_DEBUG,
579 "Enough bandwidth available for %u active addresses in network `%s'\n",
584 LOG(GNUNET_ERROR_TYPE_DEBUG,
585 "Not enough bandwidth available for %u active addresses in network `%s'\n",
591 * Update bandwidth assigned to peers in this network
593 * @param s the solver handle
594 * @param net the network type to update
598 distribute_bandwidth (struct GAS_PROPORTIONAL_Handle *s,
601 struct AddressSolverInformation *asi;
602 struct AddressWrapper *cur_address;
604 unsigned long long remaining_quota_in = 0;
605 unsigned long long quota_out_used = 0;
606 unsigned long long remaining_quota_out = 0;
607 unsigned long long quota_in_used = 0;
609 uint32_t min_bw = ntohl (GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT.value__);
610 double relative_peer_prefence;
611 double sum_relative_peer_prefences; /* Important: has to be double not float due to precision */
612 double cur_pref; /* Important: has to be double not float due to precision */
615 const double *peer_relative_prefs = NULL; /* Important: has to be double not float due to precision */
617 unsigned long long assigned_quota_in = 0;
618 unsigned long long assigned_quota_out = 0;
621 LOG(GNUNET_ERROR_TYPE_INFO,
622 "Recalculate quota for network type `%s' for %u addresses (in/out): %llu/%llu \n",
623 net->desc, net->active_addresses, net->total_quota_in,
624 net->total_quota_in);
626 if (net->active_addresses == 0)
628 return; /* no addresses to update */
632 * Assign every peer in network minimum Bandwidth
633 * Distribute bandwidth left according to preference
636 if ((net->active_addresses * min_bw) > net->total_quota_in)
641 if ((net->active_addresses * min_bw) > net->total_quota_out)
647 remaining_quota_in = net->total_quota_in - (net->active_addresses * min_bw);
648 remaining_quota_out = net->total_quota_out - (net->active_addresses * min_bw);
649 LOG(GNUNET_ERROR_TYPE_DEBUG, "Remaining bandwidth : (in/out): %llu/%llu \n",
650 remaining_quota_in, remaining_quota_out);
651 sum_relative_peer_prefences = 0.0;
653 /* Calculate sum of relative preference for active addresses in this network */
655 for (cur_address = net->head; NULL != cur_address; cur_address = cur_address->next)
657 if (GNUNET_YES != cur_address->addr->active)
660 GNUNET_assert( NULL != (peer_relative_prefs = s->get_preferences (s->get_preferences_cls,
661 &cur_address->addr->peer)));
662 relative_peer_prefence = 0.0;
663 relative_peer_prefence += peer_relative_prefs[GNUNET_ATS_PREFERENCE_BANDWIDTH];
664 sum_relative_peer_prefences += relative_peer_prefence;
668 if (count_addresses != net->active_addresses)
671 LOG(GNUNET_ERROR_TYPE_WARNING,
672 "%s: Counted %u active addresses, but network says to have %u active addresses \n",
673 net->desc, count_addresses, net->active_addresses);
674 for (cur_address = net->head; NULL != cur_address; cur_address = cur_address->next)
676 if (GNUNET_YES != cur_address->addr->active)
679 LOG (GNUNET_ERROR_TYPE_WARNING, "Active: `%s' `%s' length %u\n",
680 GNUNET_i2s (&cur_address->addr->peer), cur_address->addr->plugin,
681 cur_address->addr->addr_len);
685 LOG (GNUNET_ERROR_TYPE_INFO,
686 "Total relative preference %.3f for %u addresses in network %s\n",
687 sum_relative_peer_prefences, net->active_addresses, net->desc);
689 for (cur_address = net->head; NULL != cur_address; cur_address = cur_address->next)
691 if (GNUNET_YES == cur_address->addr->active)
693 GNUNET_assert( NULL != (peer_relative_prefs =
694 s->get_preferences (s->get_preferences_cls, &cur_address->addr->peer)));
696 cur_pref = peer_relative_prefs[GNUNET_ATS_PREFERENCE_BANDWIDTH];
697 total_weight = net->active_addresses +
698 s->prop_factor * sum_relative_peer_prefences;
699 peer_weight = (1.0 + (s->prop_factor * cur_pref));
701 assigned_quota_in = min_bw
702 + ((peer_weight / total_weight) * remaining_quota_in);
703 assigned_quota_out = min_bw
704 + ((peer_weight / total_weight) * remaining_quota_out);
706 LOG (GNUNET_ERROR_TYPE_INFO,
707 "New quota for peer `%s' with weight (cur/total) %.3f/%.3f (in/out): %llu / %llu\n",
708 GNUNET_i2s (&cur_address->addr->peer), peer_weight, total_weight,
709 assigned_quota_in, assigned_quota_out);
713 assigned_quota_in = 0;
714 assigned_quota_out = 0;
717 quota_in_used += assigned_quota_in;
718 quota_out_used += assigned_quota_out;
719 /* Prevent overflow due to rounding errors */
720 if (assigned_quota_in > UINT32_MAX)
721 assigned_quota_in = UINT32_MAX;
722 if (assigned_quota_out > UINT32_MAX)
723 assigned_quota_out = UINT32_MAX;
725 /* Compare to current bandwidth assigned */
726 asi = cur_address->addr->solver_information;
727 asi->calculated_quota_in_NBO = htonl (assigned_quota_in);
728 asi->calculated_quota_out_NBO = htonl (assigned_quota_out);
730 LOG(GNUNET_ERROR_TYPE_DEBUG,
731 "Total bandwidth assigned is (in/out): %llu /%llu\n", quota_in_used,
733 if (quota_out_used > net->total_quota_out + 1) /* +1 is required due to rounding errors */
735 LOG(GNUNET_ERROR_TYPE_ERROR,
736 "Total outbound bandwidth assigned is larger than allowed (used/allowed) for %u active addresses: %llu / %llu\n",
737 net->active_addresses, quota_out_used, net->total_quota_out);
739 if (quota_in_used > net->total_quota_in + 1) /* +1 is required due to rounding errors */
741 LOG(GNUNET_ERROR_TYPE_ERROR,
742 "Total inbound bandwidth assigned is larger than allowed (used/allowed) for %u active addresses: %llu / %llu\n",
743 net->active_addresses, quota_in_used, net->total_quota_in);
747 struct FindBestAddressCtx
749 struct GAS_PROPORTIONAL_Handle *s;
750 struct ATS_Address *best;
755 find_property_index (uint32_t type)
757 int existing_types[] = GNUNET_ATS_QualityProperties;
760 for (c = 0; c < GNUNET_ATS_QualityPropertiesCount; c++)
761 if (existing_types[c] == type)
763 return GNUNET_SYSERR;
768 * Find a "good" address to use for a peer by iterating over the addresses for this peer.
769 * If we already have an existing address, we stick to it.
770 * Otherwise, we pick by lowest distance and then by lowest latency.
772 * @param cls the `struct FindBestAddressCtx *' where we store the result
774 * @param value another `struct ATS_Address*` to consider using
775 * @return #GNUNET_OK (continue to iterate)
778 find_best_address_it (void *cls,
779 const struct GNUNET_PeerIdentity *key,
782 struct FindBestAddressCtx *ctx = cls;
783 struct ATS_Address *current = value;
784 struct ATS_Address *current_best = current;
785 struct GNUNET_TIME_Absolute now;
786 struct AddressSolverInformation *asi;
787 struct GNUNET_TIME_Relative active_time;
788 struct GNUNET_TIME_Relative min_active_time;
789 const double *norm_prop_cur;
790 const double *norm_prop_best;
792 double best_distance;
798 asi = current->solver_information;
799 now = GNUNET_TIME_absolute_get ();
801 if ((current->active == GNUNET_NO)
802 && (current->blocked_until.abs_value_us
803 == GNUNET_TIME_absolute_max (now, current->blocked_until).abs_value_us))
805 /* This address is blocked for suggestion */
806 LOG (GNUNET_ERROR_TYPE_DEBUG,
807 "Address %p blocked for suggestion for %s \n",
809 GNUNET_STRINGS_relative_time_to_string (GNUNET_TIME_absolute_get_difference (now, current->blocked_until),
819 if (GNUNET_NO == is_bandwidth_available_in_network (asi->network))
821 return GNUNET_OK; /* There's no bandwidth available in this network */
824 if (NULL != ctx->best)
826 /* Compare current addresses with denominated 'best' address */
827 current_best = ctx->best;
831 /* We do not have a 'best' address so take this address */
832 LOG (GNUNET_ERROR_TYPE_DEBUG,
833 "Setting initial address %p\n",
835 current_best = current;
839 if (GNUNET_YES == current->active)
841 GNUNET_assert (asi->activated.abs_value_us != GNUNET_TIME_UNIT_ZERO_ABS.abs_value_us);
842 active_time = GNUNET_TIME_absolute_get_duration (asi->activated);
843 min_active_time.rel_value_us = ((double) GNUNET_TIME_UNIT_SECONDS.rel_value_us) *
844 PROP_STABILITY_FACTOR;
845 if (active_time.rel_value_us <= min_active_time.rel_value_us)
847 /* Keep active address for stability reasons */
853 /* Now compare ATS information */
854 norm_prop_cur = ctx->s->get_properties (ctx->s->get_properties_cls,
855 (const struct ATS_Address *) current);
856 index = find_property_index (GNUNET_ATS_QUALITY_NET_DISTANCE);
857 cur_distance = norm_prop_cur[index];
858 index = find_property_index (GNUNET_ATS_QUALITY_NET_DELAY);
859 cur_delay = norm_prop_cur[index];
861 norm_prop_best = ctx->s->get_properties (ctx->s->get_properties_cls,
862 (const struct ATS_Address *) ctx->best);
863 index = find_property_index (GNUNET_ATS_QUALITY_NET_DISTANCE);
864 best_distance = norm_prop_best[index];
865 index = find_property_index (GNUNET_ATS_QUALITY_NET_DELAY);
866 best_delay = norm_prop_best[index];
868 /* user shorter distance */
869 if (cur_distance < best_distance)
872 if (GNUNET_NO == ctx->best->active)
874 current_best = current; /* Use current */
876 else if ((best_distance / cur_distance) > ctx->s->stability_factor)
878 /* Best and active address performs worse */
879 current_best = current;
884 /* Use current best */
885 current_best = ctx->best;
888 /* User connection with less delay */
889 if (cur_delay < best_delay)
892 if (GNUNET_NO == ctx->best->active)
894 current_best = current; /* Use current */
896 else if ((best_delay / cur_delay) > ctx->s->stability_factor)
898 /* Best and active address performs worse */
899 current_best = current;
904 /* Use current best */
905 current_best = ctx->best;
909 ctx->best = current_best;
914 get_best_address (struct GAS_PROPORTIONAL_Handle *s,
915 struct GNUNET_CONTAINER_MultiPeerMap *addresses,
916 const struct GNUNET_PeerIdentity *id)
918 struct FindBestAddressCtx fba_ctx;
922 GNUNET_CONTAINER_multipeermap_get_multiple (addresses, id,
923 &find_best_address_it, &fba_ctx);
929 * Hashmap Iterator to find current active address for peer
931 * @param cls last active address
932 * @param key peer's key
933 * @param value address to check
934 * @return #GNUNET_NO on double active address else #GNUNET_YES;
937 get_active_address_it (void *cls,
938 const struct GNUNET_PeerIdentity *key,
941 struct ATS_Address **dest = cls;
942 struct ATS_Address *aa = (struct ATS_Address *) value;
944 if (GNUNET_YES == aa->active)
949 /* should never happen */
950 LOG(GNUNET_ERROR_TYPE_ERROR, "Multiple active addresses for peer `%s'\n",
951 GNUNET_i2s (&aa->peer));
961 * Find current active address for peer
963 * @param solver the solver handle
964 * @param addresses the address set
965 * @param peer the peer
966 * @return active address or NULL
968 static struct ATS_Address *
969 get_active_address (void *solver,
970 const struct GNUNET_CONTAINER_MultiPeerMap * addresses,
971 const struct GNUNET_PeerIdentity *peer)
973 struct ATS_Address * dest = NULL;
975 GNUNET_CONTAINER_multipeermap_get_multiple (addresses, peer,
976 &get_active_address_it, &dest);
982 * Lookup network struct by type
984 * @param s the solver handle
985 * @param type the network type
986 * @return the network struct
988 static struct Network *
989 get_network (struct GAS_PROPORTIONAL_Handle *s, uint32_t type)
992 for (c = 0; c < s->network_count; c++)
994 if (s->network_entries[c].type == type)
995 return &s->network_entries[c];
1002 addresse_increment (struct GAS_PROPORTIONAL_Handle *s, struct Network *net,
1003 int total, int active)
1005 if (GNUNET_YES == total)
1007 s->total_addresses++;
1008 net->total_addresses++;
1009 GNUNET_STATISTICS_update (s->stats, "# ATS addresses total", 1, GNUNET_NO);
1010 GNUNET_STATISTICS_update (s->stats, net->stat_total, 1, GNUNET_NO);
1012 if (GNUNET_YES == active)
1014 net->active_addresses++;
1015 s->active_addresses++;
1016 GNUNET_STATISTICS_update (s->stats, "# ATS active addresses total", 1,
1018 GNUNET_STATISTICS_update (s->stats, net->stat_active, 1, GNUNET_NO);
1025 addresse_decrement (struct GAS_PROPORTIONAL_Handle *s, struct Network *net,
1026 int total, int active)
1028 int res = GNUNET_OK;
1029 if (GNUNET_YES == total)
1031 if (s->total_addresses < 1)
1034 res = GNUNET_SYSERR;
1038 s->total_addresses--;
1039 GNUNET_STATISTICS_update (s->stats, "# ATS addresses total", -1,
1042 if (net->total_addresses < 1)
1045 res = GNUNET_SYSERR;
1049 net->total_addresses--;
1050 GNUNET_STATISTICS_update (s->stats, net->stat_total, -1, GNUNET_NO);
1054 if (GNUNET_YES == active)
1056 if (net->active_addresses < 1)
1059 res = GNUNET_SYSERR;
1063 net->active_addresses--;
1064 GNUNET_STATISTICS_update (s->stats, net->stat_active, -1, GNUNET_NO);
1066 if (s->active_addresses < 1)
1069 res = GNUNET_SYSERR;
1073 s->active_addresses--;
1074 GNUNET_STATISTICS_update (s->stats, "# ATS addresses total", -1,
1082 address_eq (struct ATS_Address *a, struct ATS_Address *b)
1084 GNUNET_assert (NULL != a);
1085 GNUNET_assert (NULL != b);
1086 if (0 != strcmp(a->plugin, b->plugin))
1088 if (a->addr_len != b->addr_len)
1090 if (0 != memcmp (a->addr, b->addr, b->addr_len))
1092 if (a->session_id != b->session_id)
1099 * ---------------------------
1102 propagate_bandwidth (struct GAS_PROPORTIONAL_Handle *s,
1103 struct Network *net)
1105 struct AddressWrapper *cur;
1106 struct AddressSolverInformation *asi;
1107 for (cur = net->head; NULL != cur; cur = cur->next)
1109 asi = cur->addr->solver_information;
1110 if ( (cur->addr->assigned_bw_in.value__ != asi->calculated_quota_in_NBO) ||
1111 (cur->addr->assigned_bw_out.value__ != asi->calculated_quota_out_NBO) )
1113 cur->addr->assigned_bw_in.value__ = asi->calculated_quota_in_NBO;
1114 cur->addr->assigned_bw_out.value__ = asi->calculated_quota_out_NBO;
1116 /* Reset for next iteration */
1117 asi->calculated_quota_in_NBO = htonl (0);
1118 asi->calculated_quota_out_NBO = htonl (0);
1120 LOG (GNUNET_ERROR_TYPE_DEBUG,
1121 "Bandwidth for %s address %p for peer `%s' changed to %u/%u\n",
1122 (GNUNET_NO == cur->addr->active) ? "inactive" : "active",
1124 GNUNET_i2s (&cur->addr->peer),
1125 ntohl (cur->addr->assigned_bw_in.value__),
1126 ntohl (cur->addr->assigned_bw_out.value__ ));
1128 /* Notify on change */
1129 if ((GNUNET_YES == cur->addr->active))
1131 s->bw_changed (s->bw_changed_cls, cur->addr);
1138 * Distribibute bandwidth
1140 * @param s the solver handle
1141 * @param n the network, can be NULL for all network
1142 * @param address_except do not notify for this address
1145 distribute_bandwidth_in_network (struct GAS_PROPORTIONAL_Handle *s,
1148 if (GNUNET_YES == s->bulk_lock)
1156 LOG (GNUNET_ERROR_TYPE_INFO,
1157 "Redistributing bandwidth in network %s with %u active and %u total addresses\n",
1158 GNUNET_ATS_print_network_type(n->type),
1159 n->active_addresses, n->total_addresses);
1161 if (NULL != s->env->info_cb)
1162 s->env->info_cb(s->env->info_cb_cls, GAS_OP_SOLVE_START,
1163 GAS_STAT_SUCCESS, GAS_INFO_PROP_SINGLE);
1166 distribute_bandwidth(s, n);
1168 if (NULL != s->env->info_cb)
1169 s->env->info_cb(s->env->info_cb_cls, GAS_OP_SOLVE_STOP,
1170 GAS_STAT_SUCCESS, GAS_INFO_PROP_SINGLE);
1171 if (NULL != s->env->info_cb)
1172 s->env->info_cb(s->env->info_cb_cls, GAS_OP_SOLVE_UPDATE_NOTIFICATION_START,
1173 GAS_STAT_SUCCESS, GAS_INFO_PROP_SINGLE);
1175 /* Do propagation */
1176 propagate_bandwidth (s, n);
1178 if (NULL != s->env->info_cb)
1179 s->env->info_cb(s->env->info_cb_cls, GAS_OP_SOLVE_UPDATE_NOTIFICATION_STOP,
1180 GAS_STAT_SUCCESS, GAS_INFO_PROP_SINGLE);
1185 if (NULL != s->env->info_cb)
1186 s->env->info_cb(s->env->info_cb_cls, GAS_OP_SOLVE_START,
1187 GAS_STAT_SUCCESS, GAS_INFO_PROP_ALL);
1188 for (i = 0; i < s->network_count; i++)
1191 distribute_bandwidth(s, &s->network_entries[i]);
1194 if (NULL != s->env->info_cb)
1195 s->env->info_cb(s->env->info_cb_cls, GAS_OP_SOLVE_STOP,
1196 GAS_STAT_SUCCESS, GAS_INFO_PROP_ALL);
1197 if (NULL != s->env->info_cb)
1198 s->env->info_cb(s->env->info_cb_cls, GAS_OP_SOLVE_UPDATE_NOTIFICATION_START,
1199 GAS_STAT_SUCCESS, GAS_INFO_PROP_ALL);
1200 for (i = 0; i < s->network_count; i++)
1202 /* Do propagation */
1203 propagate_bandwidth(s, &s->network_entries[i]);
1205 if (NULL != s->env->info_cb)
1206 s->env->info_cb(s->env->info_cb_cls, GAS_OP_SOLVE_UPDATE_NOTIFICATION_STOP,
1207 GAS_STAT_SUCCESS, GAS_INFO_PROP_ALL);
1211 static const struct ATS_Address *
1212 update_active_address (struct GAS_PROPORTIONAL_Handle *s,
1213 const struct GNUNET_PeerIdentity *peer)
1215 struct ATS_Address *best_address;
1216 struct ATS_Address *current_address;
1217 struct AddressSolverInformation *asi;
1218 struct Network *net;
1220 LOG (GNUNET_ERROR_TYPE_INFO, "Updating active address for peer `%s'\n",
1223 /* Find active address */
1224 current_address = get_active_address (s, s->addresses, peer);
1225 /* Find best address */
1226 best_address = get_best_address (s,s->addresses, peer);
1228 if (NULL != current_address)
1230 if ((NULL == best_address) || ((NULL != best_address) &&
1231 (GNUNET_NO == address_eq (current_address, best_address))))
1233 /* We switch to a new address, mark old address as inactive */
1234 LOG (GNUNET_ERROR_TYPE_INFO,
1235 "Disabling previous %s address %p for peer `%s'\n",
1236 (GNUNET_NO == current_address->active) ? "inactive" : "active",
1240 asi = current_address->solver_information;
1241 GNUNET_assert (NULL != asi);
1244 asi->activated = GNUNET_TIME_UNIT_ZERO_ABS;
1245 current_address->active = GNUNET_NO; /* No active any longer */
1246 current_address->assigned_bw_in = BANDWIDTH_ZERO; /* no bandwidth assigned */
1247 current_address->assigned_bw_out = BANDWIDTH_ZERO; /* no bandwidth assigned */
1249 if (GNUNET_SYSERR == addresse_decrement (s, net, GNUNET_NO, GNUNET_YES))
1252 /* Update network of previous address */
1253 distribute_bandwidth_in_network (s, net);
1255 if (NULL == best_address)
1257 /* We previously had an active address, but now we cannot suggest one
1258 * Therefore we have to disconnect the peer */
1260 LOG (GNUNET_ERROR_TYPE_INFO,
1261 "Disconnecting peer `%s' with previous %s address %p\n",
1263 (GNUNET_NO == current_address->active) ? "inactive" : "active",
1265 s->bw_changed (s->bw_changed_cls, current_address);
1269 if (NULL == best_address)
1271 LOG (GNUNET_ERROR_TYPE_INFO, "Cannot suggest address for peer `%s'\n",
1276 LOG (GNUNET_ERROR_TYPE_INFO, "Suggesting %s address %p for peer `%s'\n",
1277 (GNUNET_NO == best_address->active) ? "inactive" : "active", best_address,
1280 if ((NULL != current_address) &&
1281 (GNUNET_YES == address_eq (best_address, current_address)))
1283 if (current_address->active == GNUNET_NO)
1284 GNUNET_break (0); /* Should never happen */
1285 return best_address; /* Same same */
1288 asi = best_address->solver_information;
1289 GNUNET_assert (NULL != asi);
1292 /* Mark address as active */
1293 asi->activated = GNUNET_TIME_absolute_get();
1294 best_address->active = GNUNET_YES;
1295 addresse_increment (s, net, GNUNET_NO, GNUNET_YES);
1297 /* Distribute bandwidth */
1298 distribute_bandwidth_in_network (s, net);
1299 return best_address;
1303 * Solver API functions
1304 * ---------------------------
1308 * Changes the preferences for a peer in the problem
1310 * @param solver the solver handle
1311 * @param peer the peer to change the preference for
1312 * @param kind the kind to change the preference
1313 * @param pref_rel the normalized preference value for this kind over all clients
1316 GAS_proportional_address_change_preference (void *solver,
1317 const struct GNUNET_PeerIdentity *peer,
1318 enum GNUNET_ATS_PreferenceKind kind,
1321 struct GAS_PROPORTIONAL_Handle *s = solver;
1322 struct ATS_Address *best_address;
1323 struct ATS_Address *active_address;
1324 struct AddressSolverInformation *asi;
1326 GNUNET_assert(NULL != solver);
1327 GNUNET_assert(NULL != peer);
1329 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (s->requests, peer))
1330 return; /* Peer is not requested */
1332 /* This peer is requested, find best address */
1333 active_address = get_active_address(s, s->addresses, peer);
1334 best_address = (struct ATS_Address *) update_active_address (s, peer);
1336 if ((NULL != best_address) && ((NULL != active_address) &&
1337 (GNUNET_YES == address_eq (active_address, best_address))))
1339 asi = best_address->solver_information;
1340 GNUNET_assert (NULL != asi);
1342 /* We sticked to the same address, therefore redistribute */
1343 distribute_bandwidth_in_network (s, asi->network);
1349 * Get application feedback for a peer
1351 * @param solver the solver handle
1352 * @param application the application
1353 * @param peer the peer to change the preference for
1354 * @param scope the time interval for this feedback: [now - scope .. now]
1355 * @param kind the kind to change the preference
1356 * @param score the score
1359 GAS_proportional_address_preference_feedback (void *solver, void *application,
1360 const struct GNUNET_PeerIdentity *peer,
1361 const struct GNUNET_TIME_Relative scope,
1362 enum GNUNET_ATS_PreferenceKind kind, double score)
1364 struct GAS_PROPORTIONAL_Handle *s = solver;
1365 GNUNET_assert(NULL != solver);
1366 GNUNET_assert(NULL != peer);
1368 GNUNET_assert(NULL != s);
1373 * Get the preferred address for a specific peer
1377 * @param solver the solver handle
1378 * @param peer the identity of the peer
1380 const struct ATS_Address *
1381 GAS_proportional_get_preferred_address (void *solver,
1382 const struct GNUNET_PeerIdentity *peer)
1384 struct GAS_PROPORTIONAL_Handle *s = solver;
1385 const struct ATS_Address *best_address;
1388 GNUNET_assert(s != NULL);
1389 GNUNET_assert(peer != NULL);
1391 /* Add to list of pending requests */
1392 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (s->requests, peer))
1395 GNUNET_OK == GNUNET_CONTAINER_multipeermap_put (s->requests, peer, NULL,
1396 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
1397 LOG (GNUNET_ERROR_TYPE_INFO, "Start suggesting addresses for peer `%s'\n",
1401 best_address = update_active_address (s, peer);
1402 if (s->bulk_lock > 0)
1403 return NULL; /* Do not suggest since bulk lock is pending */
1405 return best_address;
1409 * Stop notifying about address and bandwidth changes for this peer
1411 * @param solver the solver handle
1412 * @param peer the peer
1415 GAS_proportional_stop_get_preferred_address (void *solver,
1416 const struct GNUNET_PeerIdentity *peer)
1418 struct GAS_PROPORTIONAL_Handle *s = solver;
1419 struct ATS_Address *cur;
1420 struct AddressSolverInformation *asi;
1421 struct Network *cur_net;
1423 if (GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (s->requests, peer))
1424 GNUNET_assert (GNUNET_OK == GNUNET_CONTAINER_multipeermap_remove (s->requests,
1427 cur = get_active_address (s, s->addresses, peer);
1430 LOG(GNUNET_ERROR_TYPE_INFO,
1431 "Disabling %s address %p for peer `%s'\n",
1432 (GNUNET_NO == cur->active) ? "inactive" : "active", cur,
1433 GNUNET_i2s (&cur->peer));
1435 /* Disabling current address */
1436 asi = cur->solver_information;
1437 cur_net = asi->network ;
1438 asi->activated = GNUNET_TIME_UNIT_ZERO_ABS;
1439 cur->active = GNUNET_NO; /* No active any longer */
1440 cur->assigned_bw_in = BANDWIDTH_ZERO; /* no bandwidth assigned */
1441 cur->assigned_bw_out = BANDWIDTH_ZERO; /* no bandwidth assigned */
1443 if (GNUNET_SYSERR == addresse_decrement (s, cur_net, GNUNET_NO, GNUNET_YES))
1446 distribute_bandwidth_in_network (s, cur_net );
1452 * Remove an address from the solver
1454 * @param solver the solver handle
1455 * @param address the address to remove
1456 * @param session_only delete only session not whole address
1459 GAS_proportional_address_delete (void *solver, struct ATS_Address *address,
1462 struct GAS_PROPORTIONAL_Handle *s = solver;
1463 struct Network *net;
1464 struct AddressWrapper *aw;
1465 struct AddressSolverInformation *asi;
1467 /* Remove an adress completely, we have to:
1468 * - Remove from specific network
1469 * - Decrease number of total addresses
1471 * - decrease number of active addreses
1474 asi = address->solver_information;
1483 if (GNUNET_NO == session_only)
1485 LOG(GNUNET_ERROR_TYPE_INFO,
1486 "Deleting %s address %p for peer `%s' from network `%s' (total: %u/ active: %u)\n",
1487 (GNUNET_NO == address->active) ? "inactive" : "active", address,
1488 GNUNET_i2s (&address->peer), net->desc, net->total_addresses,
1489 net->active_addresses);
1491 /* Remove address */
1492 addresse_decrement (s, net, GNUNET_YES, GNUNET_NO);
1493 for (aw = net->head; NULL != aw; aw = aw->next)
1495 if (aw->addr == address)
1503 GNUNET_CONTAINER_DLL_remove(net->head, net->tail, aw);
1508 /* Remove session only: remove if active and update */
1509 LOG(GNUNET_ERROR_TYPE_INFO,
1510 "Deleting %s session %p for peer `%s' from network `%s' (total: %u/ active: %u)\n",
1511 (GNUNET_NO == address->active) ? "inactive" : "active", address,
1512 GNUNET_i2s (&address->peer), net->desc, net->total_addresses,
1513 net->active_addresses);
1516 if (GNUNET_YES == address->active)
1518 /* Address was active, remove from network and update quotas*/
1519 address->active = GNUNET_NO;
1520 address->assigned_bw_in = BANDWIDTH_ZERO;
1521 address->assigned_bw_out = BANDWIDTH_ZERO;
1522 asi->calculated_quota_in_NBO = htonl (0);
1523 asi->calculated_quota_out_NBO = htonl (0);
1525 if (GNUNET_SYSERR == addresse_decrement (s, net, GNUNET_NO, GNUNET_YES))
1527 distribute_bandwidth_in_network (s, net);
1529 if (NULL == update_active_address (s, &address->peer))
1531 /* No alternative address found, disconnect peer */
1532 LOG (GNUNET_ERROR_TYPE_INFO,
1533 "Disconnecting peer `%s' after deleting previous %s address %p\n",
1534 GNUNET_i2s (&address->peer),
1535 (GNUNET_NO == address->active) ? "inactive" : "active",
1537 s->bw_changed (s->bw_changed_cls, address);
1540 if (GNUNET_NO == session_only)
1542 GNUNET_free_non_null (address->solver_information);
1543 address->solver_information = NULL;
1546 LOG(GNUNET_ERROR_TYPE_INFO,
1547 "After deleting address now total %u and active %u addresses in network `%s'\n",
1548 net->total_addresses, net->active_addresses, net->desc);
1553 * Start a bulk operation
1555 * @param solver the solver
1558 GAS_proportional_bulk_start (void *solver)
1560 LOG(GNUNET_ERROR_TYPE_DEBUG, "Locking solver for bulk operation ...\n");
1561 struct GAS_PROPORTIONAL_Handle *s = (struct GAS_PROPORTIONAL_Handle *) solver;
1563 GNUNET_assert(NULL != solver);
1569 * Bulk operation done
1572 GAS_proportional_bulk_stop (void *solver)
1574 LOG(GNUNET_ERROR_TYPE_DEBUG, "Unlocking solver from bulk operation ...\n");
1576 struct GAS_PROPORTIONAL_Handle *s = (struct GAS_PROPORTIONAL_Handle *) solver;
1577 GNUNET_assert(NULL != solver);
1579 if (s->bulk_lock < 1)
1585 if ((0 == s->bulk_lock) && (0 < s->bulk_requests))
1587 LOG(GNUNET_ERROR_TYPE_INFO, "No lock pending, recalculating\n");
1588 distribute_bandwidth_in_network (s, NULL);
1589 s->bulk_requests = 0;
1595 * Add a new single address to a network
1597 * @param solver the solver Handle
1598 * @param address the address to add
1599 * @param network network type of this address
1602 GAS_proportional_address_add (void *solver, struct ATS_Address *address,
1606 * Transport properties for this address have changed
1608 * @param solver solver handle
1609 * @param address the address
1610 * @param type the ATSI type in HBO
1611 * @param abs_value the absolute value of the property
1612 * @param rel_value the normalized value
1615 GAS_proportional_address_property_changed (void *solver,
1616 struct ATS_Address *address, uint32_t type, uint32_t abs_value,
1619 struct GAS_PROPORTIONAL_Handle *s;
1621 struct AddressSolverInformation *asi;
1622 struct ATS_Address *best_address;
1623 struct ATS_Address *active_address;
1625 GNUNET_assert(NULL != solver);
1626 GNUNET_assert(NULL != address);
1628 s = (struct GAS_PROPORTIONAL_Handle *) solver;
1629 asi = address->solver_information;
1643 LOG(GNUNET_ERROR_TYPE_INFO,
1644 "Property `%s' for peer `%s' address %p changed to %.2f \n",
1645 GNUNET_ATS_print_property_type (type), GNUNET_i2s (&address->peer),
1646 address, rel_value);
1648 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (s->requests, &address->peer))
1649 return; /* Peer is not requested */
1651 /* This peer is requested, find active and best address */
1652 active_address = get_active_address(s, s->addresses, &address->peer);
1653 best_address = (struct ATS_Address *) update_active_address (s, &address->peer);
1655 if ((NULL != best_address) && ((NULL != active_address) &&
1656 (GNUNET_YES == address_eq (active_address, best_address))))
1658 asi = best_address->solver_information;
1659 GNUNET_assert (NULL != asi);
1661 /* We sticked to the same address, therefore redistribute */
1662 distribute_bandwidth_in_network (s, asi->network);
1667 * Transport session for this address has changed
1669 * NOTE: values in addresses are already updated
1671 * @param solver solver handle
1672 * @param address the address
1673 * @param cur_session the current session
1674 * @param new_session the new session
1677 GAS_proportional_address_session_changed (void *solver,
1678 struct ATS_Address *address, uint32_t cur_session, uint32_t new_session)
1680 struct GAS_PROPORTIONAL_Handle *s = solver;
1681 struct ATS_Address *best_address;
1682 struct ATS_Address *active_address;
1683 struct AddressSolverInformation *asi;
1685 s = (struct GAS_PROPORTIONAL_Handle *) solver;
1686 if (cur_session != new_session)
1688 LOG(GNUNET_ERROR_TYPE_DEBUG, "Session changed from %u to %u\n", cur_session,
1692 if (NULL == address->solver_information)
1698 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (s->requests, &address->peer))
1699 return; /* Peer is not requested */
1701 /* This peer is requested, find active and best address */
1702 active_address = get_active_address(s, s->addresses, &address->peer);
1703 best_address = (struct ATS_Address *) update_active_address (s, &address->peer);
1705 if ((NULL != best_address) && ((NULL != active_address) &&
1706 (GNUNET_YES == address_eq (active_address, best_address))))
1708 asi = best_address->solver_information;
1709 GNUNET_assert (NULL != asi);
1711 /* We sticked to the same address, therefore redistribute */
1712 distribute_bandwidth_in_network (s, asi->network);
1717 * Usage for this address has changed
1719 * NOTE: values in addresses are already updated
1721 * @param solver solver handle
1722 * @param address the address
1723 * @param in_use usage state
1726 GAS_proportional_address_inuse_changed (void *solver,
1727 struct ATS_Address *address, int in_use)
1729 struct GAS_PROPORTIONAL_Handle *s;
1731 struct AddressSolverInformation *asi;
1732 struct ATS_Address *best_address;
1733 struct ATS_Address *active_address;
1735 GNUNET_assert(NULL != solver);
1736 GNUNET_assert(NULL != address);
1738 s = (struct GAS_PROPORTIONAL_Handle *) solver;
1739 asi = address->solver_information;
1753 LOG(GNUNET_ERROR_TYPE_INFO,
1754 "Usage of peer `%s' address %p changed to %s \n",
1755 GNUNET_i2s (&address->peer), address,
1756 (GNUNET_YES == in_use) ? "YES" : "NO");
1758 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (s->requests, &address->peer))
1759 return; /* Peer is not requested */
1761 /* This peer is requested, find active and best address */
1762 active_address = get_active_address(s, s->addresses, &address->peer);
1763 best_address = (struct ATS_Address *) update_active_address (s, &address->peer);
1765 if ((NULL != best_address) && ((NULL != active_address) &&
1766 (GNUNET_YES == address_eq (active_address, best_address))))
1768 asi = best_address->solver_information;
1769 GNUNET_assert (NULL != asi);
1771 /* We sticked to the same address, therefore redistribute */
1772 distribute_bandwidth_in_network (s, asi->network);
1777 * Network scope for this address has changed
1779 * NOTE: values in addresses are already updated
1781 * @param solver solver handle
1782 * @param address the address
1783 * @param current_network the current network
1784 * @param new_network the new network
1787 GAS_proportional_address_change_network (void *solver,
1788 struct ATS_Address *address, uint32_t current_network, uint32_t new_network)
1790 struct GAS_PROPORTIONAL_Handle *s = (struct GAS_PROPORTIONAL_Handle *) solver;
1791 struct AddressSolverInformation *asi;
1792 int save_active = GNUNET_NO;
1794 struct Network *new_net = NULL;
1796 if (current_network == new_network)
1802 asi = address->solver_information;
1809 /* Network changed */
1810 LOG(GNUNET_ERROR_TYPE_DEBUG,
1811 "Network type changed, moving %s address from `%s' to `%s'\n",
1812 (GNUNET_YES == address->active) ? "active" : "inactive",
1813 GNUNET_ATS_print_network_type (current_network),
1814 GNUNET_ATS_print_network_type (new_network));
1817 /* Start bulk to prevent disconnect */
1818 GAS_proportional_bulk_start(s);
1820 save_active = address->active;
1822 /* Disable and assign no bandwidth */
1823 address->active = GNUNET_NO;
1824 address->assigned_bw_in = BANDWIDTH_ZERO; /* no bandwidth assigned */
1825 address->assigned_bw_out = BANDWIDTH_ZERO; /* no bandwidth assigned */
1827 /* Remove from old network */
1828 GAS_proportional_address_delete (solver, address, GNUNET_NO);
1830 /* Set new network type */
1831 if (NULL == (new_net = get_network (solver, new_network)))
1833 /* Address changed to invalid network... */
1834 LOG(GNUNET_ERROR_TYPE_ERROR,
1835 _("Invalid network type `%u' `%s': Disconnect!\n"), new_network,
1836 GNUNET_ATS_print_network_type (new_network));
1837 s->bw_changed (s->bw_changed_cls, address);
1841 /* Add to new network and update*/
1842 GAS_proportional_address_add (solver, address, new_network);
1844 GAS_proportional_bulk_stop (s);
1846 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (s->requests, &address->peer))
1847 return; /* Peer is not requested */
1849 /* Find new address to suggest */
1850 if (GNUNET_YES == save_active)
1852 /* No address available, therefore disconnect */
1853 if (NULL == update_active_address (s, &address->peer))
1854 s->bw_changed (s->bw_changed_cls, address);
1860 * Add a new single address to a network
1862 * @param solver the solver Handle
1863 * @param address the address to add
1864 * @param network network type of this address
1867 GAS_proportional_address_add (void *solver, struct ATS_Address *address,
1870 struct GAS_PROPORTIONAL_Handle *s = solver;
1871 struct Network *net = NULL;
1872 struct AddressWrapper *aw = NULL;
1873 struct AddressSolverInformation *asi;
1875 GNUNET_assert(NULL != s);
1876 net = get_network (s, network);
1881 LOG(GNUNET_ERROR_TYPE_ERROR,
1882 "Unknown network %u `%s' for new address %p for peer `%s'\n",
1883 network, GNUNET_ATS_print_network_type(network),
1884 address, GNUNET_i2s(&address->peer));
1889 aw = GNUNET_new (struct AddressWrapper);
1891 GNUNET_CONTAINER_DLL_insert(net->head, net->tail, aw);
1892 addresse_increment (s, net, GNUNET_YES, GNUNET_NO);
1894 asi = GNUNET_new (struct AddressSolverInformation);
1896 asi->calculated_quota_in_NBO = htonl (0);
1897 asi->calculated_quota_out_NBO = htonl (0);
1898 aw->addr->solver_information = asi;
1900 LOG(GNUNET_ERROR_TYPE_INFO,
1901 "Adding new address %p for peer `%s', now total %u and active %u addresses in network `%s'\n",
1902 address, GNUNET_i2s(&address->peer), net->total_addresses, net->active_addresses, net->desc);
1904 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (s->requests, &address->peer))
1905 return; /* Peer is not requested */
1907 /* This peer is requested, find best address */
1908 update_active_address (s, &address->peer);
1912 /* end of plugin_ats_proportional.c */