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3 (C) 2011 Christian Grothoff (and other contributing authors)
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22 * @file ats/gnunet-service-ats_addresses.c
23 * @brief ats service address management
24 * @author Matthias Wachs
25 * @author Christian Grothoff
28 #include "gnunet_ats_service.h"
29 #include "gnunet-service-ats.h"
30 #include "gnunet-service-ats_addresses.h"
31 #include "gnunet-service-ats_performance.h"
32 #include "gnunet-service-ats_scheduling.h"
33 #include "gnunet-service-ats_reservations.h"
35 #include "gnunet-service-ats_addresses_mlp.h"
37 #include "gnunet-service-ats_addresses_simplistic.h"
40 * NOTE: Do not change this documentation. This documentation is based on
41 * gnunet.org:/vcs/fsnsg/ats-paper.git/tech-doku/ats-tech-guide.tex
42 * use build_txt.sh to generate plaintext output
44 * 1 ATS addresses : ATS address management
46 * This ATS addresses ("addresses") component manages the addresses known to
47 * ATS service and suggests addresses to transport service when it is
48 * interested in address suggestion for a peer. ATS addresses also
49 * instantiates the bandwidth assignment mechanism (solver), notifies it
50 * about changes to addresses and forwards changes to bandwidth assignments
51 * to transport, depending if transport is interested in this change.
57 * Addresses are added by specifying peer ID, plugin, address, address length
58 * and session, if available. ATS information can be specified if available.
62 * ATS specifies a fix set of networks an address can belong to. For each
63 * network an inbound and outbound quota will be specified. The available
64 * networks and addtional helper varaibles are defined in
65 * gnunet_ats_service.h. At the moment 5 networks are defined:
66 * * GNUNET_ATS_NET_UNSPECIFIED
67 * * GNUNET_ATS_NET_LOOPBACK
68 * * GNUNET_ATS_NET_LAN
69 * * GNUNET_ATS_NET_WAN
70 * * GNUNET_ATS_NET_WLAN
72 * The total number of networks defined is stored in
73 * GNUNET_ATS_NetworkTypeCount GNUNET_ATS_NetworkType can be used array
74 * initializer for an int array, while GNUNET_ATS_NetworkType is an
75 * initializer for a char array containing a string description of all
80 * An inbound and outbound quota for each of the networks mentioned in 1.1.2
81 * is loaded from ats configuration during initialization. This quota defines
82 * to total amount of inbound and outbound traffic allowed for a specific
83 * network. The configuration values used are in section ats:
84 * * "NETWORK"_QUOTA_IN = <value>
85 * * "NETWORK"_QUOTA_IN = <value>
87 * You can specify quotas by setting the <value> to a:
88 * * unrestricted: unlimited
89 * * number of bytes: e.g. 10240
90 * * fancy value: e.g. 64 Kib
92 * unlimited is defined as GNUNET_ATS_MaxBandwidthString and equivalent to
93 * the value GNUNET_ATS_MaxBandwidth Important predefined values for quotas
95 * * GNUNET_ATS_DefaultBandwidth: 65536
96 * * GNUNET_ATS_MaxBandwidth: UINT32_MAX
97 * * GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT: 1024
99 * Details of loading quotas and default values will be described on
101 * 1.1.4 Preference values
103 * 1.2 Data structures used
105 * Addresse uses struct ATS_Address for each address. The structs are stored
106 * in a linked list and provides a pointer void *solver_information for the
107 * solver to store address specific information. It provides the int values
108 * active which is set to GNUNET_YES if the address is select for transport
109 * use and used, representing that transport service is actively using this
110 * address. Address information are stored in peer, addr, addr_len, plugin.
114 * During initialization a hashmap to store addresses is created. The quotas
115 * for all networks defined for ATS are loaded from configuration. For each
116 * network first the logic will check if the string
117 * GNUNET_ATS_MaxBandwidthString is configured, if not it will try to convert
118 * the configured value as a fancy size and if this fails it will try to use
119 * it as a value_number. If no configuration value is found it will assign
120 * GNUNET_ATS_DefaultBandwidth. The most important step is to load the
121 * configured solver using configuration "[ats]:MODE". Current solvers are
122 * MODE_SIMPLISTIC, MODE_MLP. Interaction is done using a solver API
127 * * s_init: init the solver with required information
128 * * s_add: add a new address
129 * * s_update: update ATS values or session for an address
130 * * s_get: get prefered address for a peer
131 * * s_del: delete an address
132 * * s_pref: change preference value for a peer
133 * * s_done: shutdown solver
135 * Callbacks: addresses provides a bandwidth_changed_cb callback to the
136 * solver which is called when bandwidth assigned to peer has changed
140 * During shutdown all addresses are freed and the solver told to shutdown
142 * 1.6 Addresses and sessions
144 * Addresses consist of the address itself and a numerical session. When a
145 * new address without a session is added it has no session, so it gets
146 * session 0 assigned. When an address with a session is added and an address
147 * object with session 0 is found, this object is updated with the session
148 * otherwise a new address object with this session assigned is created.
152 * Addresses a1,a2 with session s1, s2 are "exact" if:
153 * (a1 == a2)&&(s1 == s2)
154 * Addresses a1,a2 with session s1, s2 are "equivalent" if:
155 * (a1 == a2)&&((s1 == s2)||(s1 == 0)||(s2 == 0)
157 * 1.7 Address management
159 * Transport service notifies ATS about changes to the addresses known to
162 * 1.7.1 Adding an address
164 * When transport learns a new address it tells ATS and ATS is telling
165 * addresses about it using GAS_address_add. If not known to addresses it
166 * creates a new address object and calls solver's s_add. ATS information are
167 * deserialized and solver is notified about the session and ATS information
170 * 1.7.2 Updating an address
172 * Addresses does an lookup up for the existing address with the given
173 * session. If disassembles included ATS information and notifies the solver
174 * using s_update about the update.
176 * 1.7.3 Deleting an address
178 * Addresses does an lookup for the exact address and session and if removes
179 * this address. If session != 0 the session is set to 0 and the address is
180 * kept. If session == 0, the addresses is removed.
182 * 1.7.4 Requesting an address suggestion
184 * The address client issues a request address message to be notified about
185 * address suggestions for a specific peer. Addresses asks the solver with
186 * s_get. If no address is available, it will not send a response, otherwise
187 * it will respond with the choosen address.
189 * 1.7.5 Address suggestions
191 * Addresses will notify the client automatically on any bandwidth_changed_cb
192 * by the solver if a address suggestion request is pending. If no address is
193 * available it will not respond at all If the client is not interested
194 * anymore, it has to cancel the address suggestion request.
196 * 1.7.6 Suggestions blocks and reset
198 * After suggesting an address it is blocked for ATS_BLOCKING_DELTA sec. to
199 * prevent the client from being thrashed. If the client requires immediately
200 * it can reset this block using GAS_addresses_handle_backoff_reset.
202 * 1.7.7 Marking address in use
204 * The client can notify addresses that it successfully uses an address and
205 * wants this address to be kept by calling GSA_address_in_use. Adresses will
206 * mark the address as used an notify the solver about the use.
208 * 1.7.8 Address lifecycle
211 * * (updated address) || (address in use)
214 * 1.8 Bandwidth assignment
216 * The addresses are used to perform resource allocation operations. ATS
217 * addresses takes care of instantiating the solver configured and notifies
218 * the respective solver about address changes and receives changes to the
219 * bandwidth assignment from the solver. The current bandwidth assignment is
220 * sent to transport. The specific solvers will be described in the specific
223 * 1.9 Changing peer preferences
225 * The bandwidth assigned to a peer can be influenced by setting a preference
226 * for a peer. The prefernce will be given to to the solver with s_pref which
227 * has to take care of the preference value
233 * Available ressource assignment modes
240 * Assign each peer an equal amount of bandwidth (bw)
242 * bw_per_peer = bw_total / #active addresses
249 * Solve ressource assignment as an optimization problem
250 * Uses an mixed integer programming solver
256 * Pending Address suggestion requests
258 struct GAS_Addresses_Suggestion_Requests
263 struct GAS_Addresses_Suggestion_Requests *next;
268 struct GAS_Addresses_Suggestion_Requests *prev;
273 struct GNUNET_PeerIdentity id;
277 * Handle for ATS address component
279 struct GAS_Addresses_Handle
284 struct GNUNET_STATISTICS_Handle *stat;
287 * A multihashmap to store all addresses
289 struct GNUNET_CONTAINER_MultiHashMap *addresses;
292 * Configure WAN quota in
294 unsigned long long wan_quota_in;
297 * Configure WAN quota out
299 unsigned long long wan_quota_out;
302 * Is ATS addresses running
307 * Configured ATS solver
317 * Address suggestion requests DLL head
319 struct GAS_Addresses_Suggestion_Requests *r_head;
322 * Address suggestion requests DLL tail
324 struct GAS_Addresses_Suggestion_Requests *r_tail;
326 /* Solver functions */
331 GAS_solver_init s_init;
334 * Add an address to the solver
336 GAS_solver_address_add s_add;
339 * Update address in solver
341 GAS_solver_address_update s_update;
344 * Get address from solver
346 GAS_solver_get_preferred_address s_get;
349 * Get address from solver
351 GAS_solver_stop_get_preferred_address s_get_stop;
354 * Delete address in solver
356 GAS_solver_address_delete s_del;
359 * Change preference for quality in solver
361 GAS_solver_address_change_preference s_pref;
366 GAS_solver_done s_done;
371 assemble_ats_information (const struct ATS_Address *aa, struct GNUNET_ATS_Information **dest)
373 unsigned int ats_count = GNUNET_ATS_PropertyCount - 1;
374 struct GNUNET_ATS_Information *ats = GNUNET_malloc (ats_count * sizeof (struct GNUNET_ATS_Information));
377 ats[0].type = ntohl(GNUNET_ATS_UTILIZATION_UP);
378 ats[0].value = aa->atsp_utilization_out.value__;
379 ats[1].type = ntohl(GNUNET_ATS_UTILIZATION_DOWN);
380 ats[1].value = aa->atsp_utilization_in.value__;
381 ats[2].type = ntohl(GNUNET_ATS_NETWORK_TYPE);
382 ats[2].value = ntohl(aa->atsp_network_type);
383 ats[3].type = ntohl(GNUNET_ATS_QUALITY_NET_DELAY);
384 ats[3].value = ntohl(aa->atsp_latency.rel_value);
385 ats[4].type = ntohl(GNUNET_ATS_QUALITY_NET_DISTANCE);
386 ats[4].value = ntohl(aa->atsp_distance);
387 ats[5].type = ntohl(GNUNET_ATS_COST_WAN);
388 ats[5].value = ntohl (aa->atsp_cost_wan);
389 ats[6].type = ntohl(GNUNET_ATS_COST_LAN);
390 ats[6].value = ntohl (aa->atsp_cost_lan);
391 ats[7].type = ntohl(GNUNET_ATS_COST_WLAN);
392 ats[7].value = ntohl (aa->atsp_cost_wlan);
397 disassemble_ats_information (const struct GNUNET_ATS_Information *src,
399 struct ATS_Address *dest)
402 int change = GNUNET_NO;
404 for (i = 0; i < ats_count; i++)
405 switch (ntohl (src[i].type))
407 case GNUNET_ATS_UTILIZATION_UP:
408 if (dest->atsp_utilization_out.value__ != src[i].value)
410 dest->atsp_utilization_out.value__ = src[i].value;
413 case GNUNET_ATS_UTILIZATION_DOWN:
414 if (dest->atsp_utilization_in.value__ != src[i].value)
416 dest->atsp_utilization_in.value__ = src[i].value;
419 case GNUNET_ATS_QUALITY_NET_DELAY:
420 if (dest->atsp_latency.rel_value != src[i].value)
422 dest->atsp_latency.rel_value = ntohl (src[i].value);
425 case GNUNET_ATS_QUALITY_NET_DISTANCE:
426 if (dest->atsp_distance!= src[i].value)
428 dest->atsp_distance = ntohl (src[i].value);
431 case GNUNET_ATS_COST_WAN:
432 if (dest->atsp_cost_wan != src[i].value)
434 dest->atsp_cost_wan = ntohl (src[i].value);
437 case GNUNET_ATS_COST_LAN:
438 if (dest->atsp_cost_lan != src[i].value)
440 dest->atsp_cost_lan = ntohl (src[i].value);
443 case GNUNET_ATS_COST_WLAN:
444 if (dest->atsp_cost_wlan != src[i].value)
446 dest->atsp_cost_wlan = ntohl (src[i].value);
449 case GNUNET_ATS_NETWORK_TYPE:
450 if (dest->atsp_network_type != src[i].value)
452 dest->atsp_network_type = ntohl (src[i].value);
455 case GNUNET_ATS_ARRAY_TERMINATOR:
458 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
459 "Received unsupported ATS type %u\n", ntohl (src[i].type));
463 if (GNUNET_YES == change)
465 struct GNUNET_ATS_Information *destats;
467 ats_count = assemble_ats_information (dest, &destats);
468 GAS_handle_performance_update (&dest->peer, dest->plugin,
469 dest->addr, dest->addr_len, dest->active,
470 destats, ats_count, dest->assigned_bw_out, dest->assigned_bw_in);
471 GNUNET_free (destats);
477 * Free the given address
478 * @param addr address to destroy
481 free_address (struct ATS_Address *addr)
483 GNUNET_free (addr->plugin);
488 * Create a ATS_address with the given information
490 * @param plugin_name plugin
491 * @param plugin_addr address
492 * @param plugin_addr_len address length
493 * @param session_id session
494 * @return the ATS_Address
496 static struct ATS_Address *
497 create_address (const struct GNUNET_PeerIdentity *peer,
498 const char *plugin_name,
499 const void *plugin_addr, size_t plugin_addr_len,
502 struct ATS_Address *aa = NULL;
504 aa = GNUNET_malloc (sizeof (struct ATS_Address) + plugin_addr_len);
506 aa->addr_len = plugin_addr_len;
508 memcpy (&aa[1], plugin_addr, plugin_addr_len);
509 aa->plugin = GNUNET_strdup (plugin_name);
510 aa->session_id = session_id;
511 aa->active = GNUNET_NO;
512 aa->used = GNUNET_NO;
513 aa->solver_information = NULL;
514 aa->assigned_bw_in = GNUNET_BANDWIDTH_value_init(0);
515 aa->assigned_bw_out = GNUNET_BANDWIDTH_value_init(0);
521 * Destroy the given address.
523 * @param handle the address handle
524 * @param addr address to destroy
525 * @return GNUNET_YES if bandwidth allocations should be recalcualted
528 destroy_address (struct GAS_Addresses_Handle *handle, struct ATS_Address *addr)
533 GNUNET_assert (GNUNET_YES ==
534 GNUNET_CONTAINER_multihashmap_remove (handle->addresses,
535 &addr->peer.hashPubKey,
542 struct CompareAddressContext
544 const struct ATS_Address *search;
546 /* exact_address != NULL if address and session is equal */
547 struct ATS_Address *exact_address;
548 /* exact_address != NULL if address and session is 0 */
549 struct ATS_Address *base_address;
554 compare_address_it (void *cls, const struct GNUNET_HashCode * key, void *value)
556 struct CompareAddressContext *cac = cls;
557 struct ATS_Address *aa = value;
559 /* Find an matching exact address:
562 * aa->addr_len == cac->search->addr_len
563 * aa->plugin == cac->search->plugin
564 * aa->addr == cac->search->addr
565 * aa->session == cac->search->session
567 * return as exact address
569 if ((aa->addr_len == cac->search->addr_len) && (0 == strcmp (aa->plugin, cac->search->plugin)))
571 if ((0 == memcmp (aa->addr, cac->search->addr, aa->addr_len)) && (aa->session_id == cac->search->session_id))
572 cac->exact_address = aa;
575 /* Find an matching base address:
579 * aa->session_id == 0
582 * aa->addr_len == cac->search->addr_len
583 * aa->plugin == cac->search->plugin
584 * aa->addr == cac->search->addr
586 * return as base address
588 if ((aa->addr_len == cac->search->addr_len) && (0 == strcmp (aa->plugin, cac->search->plugin)))
590 if ((0 == memcmp (aa->addr, cac->search->addr, aa->addr_len)) && (aa->session_id == 0))
591 cac->base_address = aa;
594 /* Find an matching exact address based on session:
598 * cac->search->addr_len == 0
601 * aa->plugin == cac->search->plugin
602 * aa->session_id == cac->search->session_id
604 * return as exact address
606 if (0 == cac->search->addr_len)
608 if ((0 == strcmp (aa->plugin, cac->search->plugin)) && (aa->session_id == cac->search->session_id))
609 cac->exact_address = aa;
612 if (cac->exact_address == NULL)
613 return GNUNET_YES; /* Continue iteration to find exact address */
615 return GNUNET_NO; /* Stop iteration since we have an exact address */
620 * Find an existing equivalent address record.
621 * Compares by peer identity and network address OR by session ID
622 * (one of the two must match).
624 * @param handle the address handle
625 * @param peer peer to lookup addresses for
626 * @param addr existing address record
627 * @return existing address record, NULL for none
630 find_equivalent_address (struct GAS_Addresses_Handle *handle,
631 const struct GNUNET_PeerIdentity *peer,
632 const struct ATS_Address *addr)
634 struct CompareAddressContext cac;
636 cac.exact_address = NULL;
637 cac.base_address = NULL;
639 GNUNET_CONTAINER_multihashmap_get_multiple (handle->addresses, &peer->hashPubKey,
640 &compare_address_it, &cac);
642 if (cac.exact_address == NULL)
643 return cac.base_address;
644 return cac.exact_address;
648 static struct ATS_Address *
649 lookup_address (struct GAS_Addresses_Handle *handle,
650 const struct GNUNET_PeerIdentity *peer,
651 const char *plugin_name,
652 const void *plugin_addr,
653 size_t plugin_addr_len,
655 const struct GNUNET_ATS_Information *atsi,
658 struct ATS_Address *aa;
659 struct ATS_Address *ea;
661 aa = create_address (peer,
663 plugin_addr, plugin_addr_len,
666 /* Get existing address or address with session == 0 */
667 ea = find_equivalent_address (handle, peer, aa);
673 else if (ea->session_id != session_id)
682 GAS_addresses_add (struct GAS_Addresses_Handle *handle,
683 const struct GNUNET_PeerIdentity *peer,
684 const char *plugin_name, const void *plugin_addr,
685 size_t plugin_addr_len, uint32_t session_id,
686 const struct GNUNET_ATS_Information *atsi,
689 struct ATS_Address *aa;
690 struct ATS_Address *ea;
691 unsigned int ats_res;
693 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
694 "Received `%s' for peer `%s'\n",
698 if (GNUNET_NO == handle->running)
701 GNUNET_assert (NULL != handle->addresses);
703 aa = create_address (peer, plugin_name, plugin_addr, plugin_addr_len,
705 if (atsi_count != (ats_res = disassemble_ats_information(atsi, atsi_count, aa)))
707 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
708 "While adding address: had %u ATS elements to add, could only add %u\n",
709 atsi_count, ats_res);
712 /* Get existing address or address with session == 0 */
713 ea = find_equivalent_address (handle, peer, aa);
716 /* We have a new address */
717 GNUNET_assert (GNUNET_OK ==
718 GNUNET_CONTAINER_multihashmap_put (handle->addresses,
719 &peer->hashPubKey, aa,
720 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
721 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Added new address for peer `%s' session id %u, %p\n",
722 GNUNET_i2s (peer), session_id, aa);
723 /* Tell solver about new address */
724 handle->s_add (handle->solver, handle->addresses, aa);
727 GNUNET_free (aa->plugin);
730 if (ea->session_id != 0)
732 /* This address with the same session is already existing
733 * Should not happen */
734 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
735 "Added already existing address for peer `%s' `%s' %p with new session %u\n",
736 GNUNET_i2s (peer), plugin_name, session_id);
741 /* We have an address without an session, update this address */
743 /* Notify solver about update with atsi information and session */
744 handle->s_update (handle->solver, handle->addresses, ea, session_id, ea->used, atsi, atsi_count);
747 ea->session_id = session_id;
748 if (atsi_count != (ats_res = disassemble_ats_information(atsi, atsi_count, ea)))
750 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
751 "While updating address: had %u ATS elements to add, could only add %u\n",
752 atsi_count, ats_res);
754 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
755 "Updated existing address for peer `%s' %p with new session %u\n",
756 GNUNET_i2s (peer), ea, session_id);
761 GAS_addresses_update (struct GAS_Addresses_Handle *handle,
762 const struct GNUNET_PeerIdentity *peer,
763 const char *plugin_name, const void *plugin_addr,
764 size_t plugin_addr_len, uint32_t session_id,
765 const struct GNUNET_ATS_Information *atsi,
768 struct ATS_Address *aa;
771 if (GNUNET_NO == handle->running)
774 GNUNET_assert (NULL != handle->addresses);
776 /* Get existing address */
777 aa = lookup_address (handle, peer, plugin_name, plugin_addr, plugin_addr_len,
778 session_id, atsi, atsi_count);
781 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Tried to update unknown address for peer `%s' `%s' session id %u\n",
782 GNUNET_i2s (peer), plugin_name, session_id);
787 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
788 "Received `%s' for peer `%s' address \n",
790 GNUNET_i2s (peer), aa);
792 /* Tell solver about update */
793 handle->s_update (handle->solver, handle->addresses, aa, session_id, aa->used, atsi, atsi_count);
796 if (atsi_count != (ats_res = disassemble_ats_information (atsi, atsi_count, aa)))
798 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
799 "While adding address: had %u ATS elements to add, could only add %u\n",
800 atsi_count, ats_res);
802 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
803 "Updated %u ATS elements for address %p\n",
808 struct DestroyContext
810 struct ATS_Address *aa;
812 struct GAS_Addresses_Handle *handle;
815 * GNUNET_NO : full address
816 * GNUNET_YES : just session
825 * If session != 0, just the session is deleted, the address itself still exists
826 * If session == 0, remove full address
827 * If session == 0 and addrlen == 0, destroy inbound address
831 * @param value the 'struct ATS_Address'
832 * @return GNUNET_OK (continue to iterate)
835 destroy_by_session_id (void *cls, const struct GNUNET_HashCode * key, void *value)
837 struct DestroyContext *dc = cls;
838 struct GAS_Addresses_Handle *handle = dc->handle;
839 const struct ATS_Address *des = dc->aa;
840 struct ATS_Address *aa = value;
842 GNUNET_assert (0 == memcmp (&aa->peer, &des->peer,
843 sizeof (struct GNUNET_PeerIdentity)));
846 if (des->session_id == 0)
848 /* Session == 0, remove full address */
849 if ((0 == strcmp (des->plugin, aa->plugin)) &&
850 (aa->addr_len == des->addr_len) &&
851 (0 == memcmp (des->addr, aa->addr, aa->addr_len)))
854 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
855 "Deleting full address for peer `%s' session %u %p\n",
856 GNUNET_i2s (&aa->peer), aa->session_id, aa);
858 /* Notify solver about deletion */
859 handle->s_del (handle->solver, handle->addresses, aa, GNUNET_NO);
860 destroy_address (handle, aa);
861 dc->result = GNUNET_NO;
862 return GNUNET_OK; /* Continue iteration */
867 /* Session != 0, just remove session */
868 if (aa->session_id != des->session_id)
869 return GNUNET_OK; /* irrelevant */
871 if ((aa->session_id != 0) &&
872 (0 != strcmp (des->plugin, aa->plugin)))
874 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
875 "Different plugins during removal: `%s' vs `%s' \n",
876 des->plugin, aa->plugin);
881 if (aa->addr_len == 0)
883 /* Inbound connection died, delete full address */
884 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
885 "Deleting inbound address for peer `%s': `%s' session %u\n",
886 GNUNET_i2s (&aa->peer), aa->plugin, aa->session_id);
888 /* Notify solver about deletion */
889 handle->s_del (handle->solver, handle->addresses, aa, GNUNET_NO);
890 destroy_address (handle, aa);
891 dc->result = GNUNET_NO;
892 return GNUNET_OK; /* Continue iteration */
897 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
898 "Deleting session for peer `%s': `%s' %u\n",
899 GNUNET_i2s (&aa->peer), aa->plugin, aa->session_id);
900 /* Notify solver to delete session */
901 handle->s_del (handle->solver, handle->addresses, aa, GNUNET_YES);
910 GAS_addresses_destroy (struct GAS_Addresses_Handle *handle,
911 const struct GNUNET_PeerIdentity *peer,
912 const char *plugin_name, const void *plugin_addr,
913 size_t plugin_addr_len, uint32_t session_id)
915 struct ATS_Address *ea;
916 struct DestroyContext dc;
918 if (GNUNET_NO == handle->running)
921 /* Get existing address */
922 ea = lookup_address (handle, peer, plugin_name, plugin_addr, plugin_addr_len,
923 session_id, NULL, 0);
925 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
926 "Received `%s' for peer `%s' address %p session %u\n",
928 GNUNET_i2s (peer), ea, session_id);
932 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tried to destroy unknown address for peer `%s' `%s' session id %u\n",
933 GNUNET_i2s (peer), plugin_name, session_id);
937 GNUNET_break (0 < strlen (plugin_name));
939 dc.aa = create_address (peer, plugin_name, plugin_addr, plugin_addr_len, session_id);
941 GNUNET_CONTAINER_multihashmap_get_multiple (handle->addresses, &peer->hashPubKey,
942 &destroy_by_session_id, &dc);
943 free_address (dc.aa);
948 GAS_addresses_in_use (struct GAS_Addresses_Handle *handle,
949 const struct GNUNET_PeerIdentity *peer,
950 const char *plugin_name, const void *plugin_addr,
951 size_t plugin_addr_len, uint32_t session_id, int in_use)
953 struct ATS_Address *ea;
955 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
956 "Received `%s' for peer `%s'\n",
960 if (GNUNET_NO == handle->running)
961 return GNUNET_SYSERR;
963 ea = lookup_address (handle, peer, plugin_name,
964 plugin_addr, plugin_addr_len,
965 session_id, NULL, 0);
968 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
969 "Trying to set unknown address `%s', %s %u %s \n",
971 plugin_name, session_id,
972 (GNUNET_NO == in_use) ? "NO" : "YES");
974 return GNUNET_SYSERR;
976 if (ea->used == in_use)
979 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
980 "Address in use called multiple times for peer `%s': %s -> %s \n",
982 (GNUNET_NO == ea->used) ? "NO" : "YES",
983 (GNUNET_NO == in_use) ? "NO" : "YES");
984 return GNUNET_SYSERR;
987 /* Tell solver about update */
988 handle->s_update (handle->solver, handle->addresses, ea, session_id, in_use, NULL, 0);
996 * Cancel address suggestions for a peer
998 * @param handle the address handle
999 * @param peer the respective peer
1002 GAS_addresses_request_address_cancel (struct GAS_Addresses_Handle *handle,
1003 const struct GNUNET_PeerIdentity *peer)
1005 struct GAS_Addresses_Suggestion_Requests *cur = handle->r_head;
1007 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1008 "Received request: `%s' for peer %s\n", "request_address_cancel", GNUNET_i2s (peer));
1012 if (0 == memcmp (peer, &cur->id, sizeof (cur->id)))
1019 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1020 "No address requests pending for peer `%s', cannot remove!\n", GNUNET_i2s (peer));
1023 handle->s_get_stop (handle->solver, handle->addresses, peer);
1024 GAS_addresses_handle_backoff_reset (handle, peer);
1025 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1026 "Removed request pending for peer `%s\n", GNUNET_i2s (peer));
1027 GNUNET_CONTAINER_DLL_remove (handle->r_head, handle->r_tail, cur);
1033 * Add an address suggestions for a peer
1035 * @param handle the address handle
1036 * @param peer the respective peer
1039 GAS_addresses_request_address (struct GAS_Addresses_Handle *handle,
1040 const struct GNUNET_PeerIdentity *peer)
1042 struct GAS_Addresses_Suggestion_Requests *cur = handle->r_head;
1043 struct ATS_Address *aa;
1044 struct GNUNET_ATS_Information *ats;
1045 unsigned int ats_count;
1047 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1048 "Received `%s' for peer `%s'\n",
1052 if (GNUNET_NO == handle->running)
1056 if (0 == memcmp (peer, &cur->id, sizeof (cur->id)))
1057 break; /* already suggesting */
1062 cur = GNUNET_malloc (sizeof (struct GAS_Addresses_Suggestion_Requests));
1064 GNUNET_CONTAINER_DLL_insert (handle->r_head, handle->r_tail, cur);
1067 /* Get prefered address from solver */
1068 aa = (struct ATS_Address *) handle->s_get (handle->solver, handle->addresses, peer);
1071 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1072 "Cannot suggest address for peer `%s'\n", GNUNET_i2s (peer));
1076 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1077 "Suggesting address %p for peer `%s'\n", aa, GNUNET_i2s (peer));
1079 ats_count = assemble_ats_information (aa, &ats);
1080 GAS_scheduling_transmit_address_suggestion (peer,
1082 aa->addr, aa->addr_len,
1085 aa->assigned_bw_out,
1086 aa->assigned_bw_in);
1088 aa->block_interval = GNUNET_TIME_relative_add (aa->block_interval, ATS_BLOCKING_DELTA);
1089 aa->blocked_until = GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get(), aa->block_interval);
1091 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1092 "Address %p ready for suggestion, block interval now %llu \n",
1093 aa, aa->block_interval);
1100 reset_address_it (void *cls, const struct GNUNET_HashCode * key, void *value)
1102 struct ATS_Address *aa = value;
1104 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1105 "Resetting interval for peer `%s' address %p from %llu to 0\n",
1106 GNUNET_i2s (&aa->peer), aa, aa->block_interval);
1108 aa->blocked_until = GNUNET_TIME_UNIT_ZERO_ABS;
1109 aa->block_interval = GNUNET_TIME_UNIT_ZERO;
1115 GAS_addresses_handle_backoff_reset (struct GAS_Addresses_Handle *handle,
1116 const struct GNUNET_PeerIdentity *peer)
1118 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1119 "Received `%s' for peer `%s'\n",
1123 GNUNET_break (GNUNET_SYSERR != GNUNET_CONTAINER_multihashmap_get_multiple (handle->addresses,
1131 GAS_addresses_change_preference (struct GAS_Addresses_Handle *handle,
1133 const struct GNUNET_PeerIdentity *peer,
1134 enum GNUNET_ATS_PreferenceKind kind,
1137 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1138 "Received `%s' for peer `%s' for client %p\n",
1139 "CHANGE PREFERENCE",
1140 GNUNET_i2s (peer), client);
1142 if (GNUNET_NO == handle->running)
1145 if (GNUNET_NO == GNUNET_CONTAINER_multihashmap_contains (handle->addresses,
1148 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1149 "Received `%s' for unknown peer `%s' from client %p\n",
1150 "CHANGE PREFERENCE",
1151 GNUNET_i2s (peer), client);
1155 /* Tell solver about update */
1156 handle->s_pref (handle->solver, client, peer, kind, score);
1161 * Load quotas for networks from configuration
1163 * @param cfg configuration handle
1164 * @param out_dest where to write outbound quotas
1165 * @param in_dest where to write inbound quotas
1166 * @param dest_length length of inbound and outbound arrays
1167 * @return number of networks loaded
1170 load_quotas (const struct GNUNET_CONFIGURATION_Handle *cfg, unsigned long long *out_dest, unsigned long long *in_dest, int dest_length)
1172 char *network_str[GNUNET_ATS_NetworkTypeCount] = GNUNET_ATS_NetworkTypeString;
1173 char * entry_in = NULL;
1174 char * entry_out = NULL;
1175 char * quota_out_str;
1176 char * quota_in_str;
1180 for (c = 0; (c < GNUNET_ATS_NetworkTypeCount) && (c < dest_length); c++)
1184 GNUNET_asprintf (&entry_out, "%s_QUOTA_OUT", network_str[c]);
1185 GNUNET_asprintf (&entry_in, "%s_QUOTA_IN", network_str[c]);
1188 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string(cfg, "ats", entry_out, "a_out_str))
1191 if (0 == strcmp(quota_out_str, GNUNET_ATS_MaxBandwidthString))
1193 out_dest[c] = GNUNET_ATS_MaxBandwidth;
1196 if ((GNUNET_NO == res) && (GNUNET_OK == GNUNET_STRINGS_fancy_size_to_bytes (quota_out_str, &out_dest[c])))
1198 if ((GNUNET_NO == res) && (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number (cfg, "ats", entry_out, &out_dest[c])))
1201 if (GNUNET_NO == res)
1203 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Could not load quota for network `%s': `%s', assigning default bandwidth %llu\n"),
1204 network_str[c], quota_out_str, GNUNET_ATS_DefaultBandwidth);
1205 out_dest[c] = GNUNET_ATS_DefaultBandwidth;
1209 GNUNET_log (GNUNET_ERROR_TYPE_INFO, _("Outbound quota configure for network `%s' is %llu\n"),
1210 network_str[c], out_dest[c]);
1212 GNUNET_free (quota_out_str);
1216 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, _("No outbound quota configured for network `%s', assigning default bandwidth %llu\n"),
1217 network_str[c], GNUNET_ATS_DefaultBandwidth);
1218 out_dest[c] = GNUNET_ATS_DefaultBandwidth;
1222 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string(cfg, "ats", entry_in, "a_in_str))
1225 if (0 == strcmp(quota_in_str, GNUNET_ATS_MaxBandwidthString))
1227 in_dest[c] = GNUNET_ATS_MaxBandwidth;
1230 if ((GNUNET_NO == res) && (GNUNET_OK == GNUNET_STRINGS_fancy_size_to_bytes (quota_in_str, &in_dest[c])))
1232 if ((GNUNET_NO == res) && (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number (cfg, "ats", entry_in, &in_dest[c])))
1235 if (GNUNET_NO == res)
1237 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Could not load quota for network `%s': `%s', assigning default bandwidth %llu\n"),
1238 network_str[c], quota_in_str, GNUNET_ATS_DefaultBandwidth);
1239 in_dest[c] = GNUNET_ATS_DefaultBandwidth;
1243 GNUNET_log (GNUNET_ERROR_TYPE_INFO, _("Inbound quota configured for network `%s' is %llu\n"),
1244 network_str[c], in_dest[c]);
1246 GNUNET_free (quota_in_str);
1250 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, _("No outbound quota configure for network `%s', assigning default bandwidth %llu\n"),
1251 network_str[c], GNUNET_ATS_DefaultBandwidth);
1252 out_dest[c] = GNUNET_ATS_DefaultBandwidth;
1254 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Loaded quota for network `%s' (in/out): %llu %llu\n", network_str[c], in_dest[c], out_dest[c]);
1255 GNUNET_free (entry_out);
1256 GNUNET_free (entry_in);
1258 return GNUNET_ATS_NetworkTypeCount;
1263 bandwidth_changed_cb (void *cls, struct ATS_Address *address)
1265 struct GAS_Addresses_Handle *handle = cls;
1266 struct GAS_Addresses_Suggestion_Requests *cur;
1267 struct GNUNET_ATS_Information *ats;
1268 unsigned int ats_count;
1270 GNUNET_assert (handle != NULL);
1271 GNUNET_assert (address != NULL);
1273 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Bandwidth assignment changed for peer %s \n", GNUNET_i2s(&address->peer));
1276 ats_count = assemble_ats_information (address, &ats);
1277 GAS_performance_notify_all_clients (&address->peer,
1279 address->addr, address->addr_len,
1280 address->session_id,
1282 address->assigned_bw_out,
1283 address->assigned_bw_in);
1285 cur = handle->r_head;
1288 if (0 == memcmp (&address->peer, &cur->id, sizeof (cur->id)))
1289 break; /* we have an address request pending*/
1294 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1295 "Nobody is interested in peer `%s' :(\n",GNUNET_i2s (&address->peer));
1300 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1301 "Sending bandwidth update for peer `%s'\n",GNUNET_i2s (&address->peer));
1304 GAS_scheduling_transmit_address_suggestion (&address->peer,
1306 address->addr, address->addr_len,
1307 address->session_id,
1309 address->assigned_bw_out,
1310 address->assigned_bw_in);
1316 * Initialize address subsystem.
1318 * @param cfg configuration to use
1319 * @param stats the statistics handle to use
1321 struct GAS_Addresses_Handle *
1322 GAS_addresses_init (const struct GNUNET_CONFIGURATION_Handle *cfg,
1323 const struct GNUNET_STATISTICS_Handle *stats)
1325 struct GAS_Addresses_Handle *ah;
1326 int quotas[GNUNET_ATS_NetworkTypeCount] = GNUNET_ATS_NetworkType;
1327 unsigned long long quotas_in[GNUNET_ATS_NetworkTypeCount];
1328 unsigned long long quotas_out[GNUNET_ATS_NetworkTypeCount];
1333 ah = GNUNET_malloc (sizeof (struct GAS_Addresses_Handle));
1334 ah->running = GNUNET_NO;
1336 ah->stat = (struct GNUNET_STATISTICS_Handle *) stats;
1337 /* Initialize the addresses database */
1338 ah->addresses = GNUNET_CONTAINER_multihashmap_create (128, GNUNET_NO);
1339 GNUNET_assert (NULL != ah->addresses);
1341 /* Figure out configured solution method */
1342 if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string (cfg, "ats", "MODE", &mode_str))
1344 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "No ressource assignment method configured, using simplistic approch\n");
1345 ah->ats_mode = MODE_SIMPLISTIC;
1349 for (c = 0; c < strlen (mode_str); c++)
1350 mode_str[c] = toupper (mode_str[c]);
1351 if (0 == strcmp (mode_str, "SIMPLISTIC"))
1353 ah->ats_mode = MODE_SIMPLISTIC;
1355 else if (0 == strcmp (mode_str, "MLP"))
1357 ah->ats_mode = MODE_MLP;
1359 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Assignment method `%s' configured, but GLPK is not availabe, please install \n", mode_str);
1360 ah->ats_mode = MODE_SIMPLISTIC;
1365 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Invalid ressource assignment method `%s' configured, using simplistic approch\n", mode_str);
1366 ah->ats_mode = MODE_SIMPLISTIC;
1368 GNUNET_free (mode_str);
1370 /* Start configured solution method */
1371 switch (ah->ats_mode)
1374 /* Init the MLP solver with default values */
1376 ah->ats_mode = MODE_MLP;
1377 ah->s_init = &GAS_mlp_init;
1378 ah->s_add = &GAS_mlp_address_add;
1379 ah->s_update = &GAS_mlp_address_update;
1380 ah->s_get = &GAS_mlp_get_preferred_address;
1381 ah->s_get_stop = &GAS_mlp_stop_get_preferred_address;
1382 ah->s_pref = &GAS_mlp_address_change_preference;
1383 ah->s_del = &GAS_mlp_address_delete;
1384 ah->s_done = &GAS_mlp_done;
1390 case MODE_SIMPLISTIC:
1391 /* Init the simplistic solver with default values */
1392 ah->ats_mode = MODE_SIMPLISTIC;
1393 ah->s_init = &GAS_simplistic_init;
1394 ah->s_add = &GAS_simplistic_address_add;
1395 ah->s_update = &GAS_simplistic_address_update;
1396 ah->s_get = &GAS_simplistic_get_preferred_address;
1397 ah->s_get_stop = &GAS_simplistic_stop_get_preferred_address;
1398 ah->s_pref = &GAS_simplistic_address_change_preference;
1399 ah->s_del = &GAS_simplistic_address_delete;
1400 ah->s_done = &GAS_simplistic_done;
1401 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "ATS started in %s mode\n", "SIMPLISTIC");
1408 GNUNET_assert (NULL != ah->s_init);
1409 GNUNET_assert (NULL != ah->s_add);
1410 GNUNET_assert (NULL != ah->s_update);
1411 GNUNET_assert (NULL != ah->s_get);
1412 GNUNET_assert (NULL != ah->s_get_stop);
1413 GNUNET_assert (NULL != ah->s_pref);
1414 GNUNET_assert (NULL != ah->s_del);
1415 GNUNET_assert (NULL != ah->s_done);
1417 quota_count = load_quotas(cfg, quotas_in, quotas_out, GNUNET_ATS_NetworkTypeCount);
1419 ah->solver = ah->s_init (cfg, stats, quotas, quotas_in, quotas_out, quota_count, &bandwidth_changed_cb, ah);
1420 if (NULL == ah->solver)
1422 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Failed to initialize solver!\n");
1427 /* up and running */
1428 ah->running = GNUNET_YES;
1434 * Free memory of address.
1437 * @param key peer identity (unused)
1438 * @param value the 'struct ATS_Address' to free
1439 * @return GNUNET_OK (continue to iterate)
1442 free_address_it (void *cls, const struct GNUNET_HashCode * key, void *value)
1444 struct GAS_Addresses_Handle *handle = cls;
1445 struct ATS_Address *aa = value;
1446 handle->s_del (handle->solver, handle->addresses, aa, GNUNET_NO);
1447 destroy_address (handle, aa);
1453 GAS_addresses_destroy_all (struct GAS_Addresses_Handle *handle)
1455 if (GNUNET_NO == handle->running)
1458 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1462 if (handle->addresses != NULL)
1463 GNUNET_CONTAINER_multihashmap_iterate (handle->addresses, &free_address_it, handle);
1468 * Shutdown address subsystem.
1471 GAS_addresses_done (struct GAS_Addresses_Handle *handle)
1473 struct GAS_Addresses_Suggestion_Requests *cur;
1475 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1476 "Shutting down addresses\n");
1477 GNUNET_assert (NULL != handle);
1478 GAS_addresses_destroy_all (handle);
1479 handle->running = GNUNET_NO;
1480 GNUNET_CONTAINER_multihashmap_destroy (handle->addresses);
1481 handle->addresses = NULL;
1482 while (NULL != (cur = handle->r_head))
1484 GNUNET_CONTAINER_DLL_remove (handle->r_head, handle->r_tail, cur);
1487 handle->s_done (handle->solver);
1488 GNUNET_free (handle);
1489 /* Stop configured solution method */
1493 struct PeerIteratorContext
1495 GNUNET_ATS_Peer_Iterator it;
1497 struct GNUNET_CONTAINER_MultiHashMap *peers_returned;
1502 const struct GNUNET_HashCode * key,
1505 struct PeerIteratorContext *ip_ctx = cls;
1506 struct GNUNET_PeerIdentity tmp;
1508 if (GNUNET_NO == GNUNET_CONTAINER_multihashmap_contains(ip_ctx->peers_returned, key))
1510 GNUNET_CONTAINER_multihashmap_put(ip_ctx->peers_returned, key, NULL, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1511 tmp.hashPubKey = (*key);
1512 ip_ctx->it (ip_ctx->it_cls, &tmp);
1519 * Return all peers currently known to ATS
1521 * @param handle the address handle
1522 * @param p_it the iterator to call for every peer, callbach with id == NULL
1524 * @param p_it_cls the closure for the iterator
1527 GAS_addresses_iterate_peers (struct GAS_Addresses_Handle *handle, GNUNET_ATS_Peer_Iterator p_it, void *p_it_cls)
1529 struct PeerIteratorContext ip_ctx;
1534 GNUNET_assert (NULL != handle->addresses);
1536 size = GNUNET_CONTAINER_multihashmap_size(handle->addresses);
1540 ip_ctx.it_cls = p_it_cls;
1541 ip_ctx.peers_returned = GNUNET_CONTAINER_multihashmap_create (size, GNUNET_NO);
1542 GNUNET_CONTAINER_multihashmap_iterate (handle->addresses, &peer_it, &ip_ctx);
1543 GNUNET_CONTAINER_multihashmap_destroy (ip_ctx.peers_returned);
1545 p_it (p_it_cls, NULL);
1548 struct PeerInfoIteratorContext
1550 GNUNET_ATS_PeerInfo_Iterator it;
1556 peerinfo_it (void *cls,
1557 const struct GNUNET_HashCode * key,
1560 struct PeerInfoIteratorContext *pi_ctx = cls;
1561 struct ATS_Address *addr = (struct ATS_Address *) value;
1562 struct GNUNET_ATS_Information *ats;
1565 if (NULL != pi_ctx->it)
1567 ats_count = assemble_ats_information (addr, &ats);
1569 pi_ctx->it (pi_ctx->it_cls,
1572 addr->addr, addr->addr_len,
1575 addr->assigned_bw_out,
1576 addr->assigned_bw_in);
1584 * Return all peers currently known to ATS
1586 * @param handle the address handle
1587 * @param peer the respective peer
1588 * @param pi_it the iterator to call for every peer
1589 * @param pi_it_cls the closure for the iterator
1592 GAS_addresses_get_peer_info (struct GAS_Addresses_Handle *handle,
1593 const struct GNUNET_PeerIdentity *peer,
1594 GNUNET_ATS_PeerInfo_Iterator pi_it,
1597 struct PeerInfoIteratorContext pi_ctx;
1598 struct GNUNET_BANDWIDTH_Value32NBO zero_bw;
1599 GNUNET_assert (NULL != peer);
1600 GNUNET_assert (NULL != handle->addresses);
1602 return; /* does not make sense without callback */
1604 zero_bw = GNUNET_BANDWIDTH_value_init (0);
1606 pi_ctx.it_cls = pi_it_cls;
1608 GNUNET_CONTAINER_multihashmap_get_multiple (handle->addresses, &peer->hashPubKey, &peerinfo_it, &pi_ctx);
1611 pi_it (pi_it_cls, NULL, NULL, NULL, 0, GNUNET_NO, NULL, 0, zero_bw, zero_bw);
1616 /* end of gnunet-service-ats_addresses.c */