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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
257 * Pending Address suggestion requests
259 struct GAS_Addresses_Suggestion_Requests
264 struct GAS_Addresses_Suggestion_Requests *next;
269 struct GAS_Addresses_Suggestion_Requests *prev;
274 struct GNUNET_PeerIdentity id;
279 * Handle for ATS address component
281 struct GAS_Addresses_Handle
286 struct GNUNET_STATISTICS_Handle *stat;
289 * A multihashmap to store all addresses
291 struct GNUNET_CONTAINER_MultiHashMap *addresses;
294 * Configure WAN quota in
296 unsigned long long wan_quota_in;
299 * Configure WAN quota out
301 unsigned long long wan_quota_out;
304 * Is ATS addresses running
309 * Configured ATS solver
319 * Address suggestion requests DLL head
321 struct GAS_Addresses_Suggestion_Requests *r_head;
324 * Address suggestion requests DLL tail
326 struct GAS_Addresses_Suggestion_Requests *r_tail;
328 /* Solver functions */
333 GAS_solver_init s_init;
336 * Add an address to the solver
338 GAS_solver_address_add s_add;
341 * Update address in solver
343 GAS_solver_address_update s_update;
346 * Get address from solver
348 GAS_solver_get_preferred_address s_get;
351 * Get address from solver
353 GAS_solver_stop_get_preferred_address s_get_stop;
356 * Delete address in solver
358 GAS_solver_address_delete s_del;
361 * Change preference for quality in solver
363 GAS_solver_address_change_preference s_pref;
368 GAS_solver_done s_done;
373 * Disassemble ATS information and update performance information in address
375 * Updates existing information and adds new information
377 * @param src source ATS information
378 * @param ats_count number of ATS information
379 * @param dest destination address
380 * @return GNUNET_YES if address was address updated, GNUNET_NO otherwise
383 disassemble_ats_information (const struct GNUNET_ATS_Information *src,
385 struct ATS_Address *dest)
393 struct GNUNET_ATS_Information add_atsi[ats_count];
394 struct GNUNET_ATS_Information *tmp_atsi;
395 uint32_t add_atsi_count;
403 if (NULL == dest->atsi)
405 /* Create performance information */
406 dest->atsi = GNUNET_malloc (ats_count * sizeof (struct GNUNET_ATS_Information));
407 dest->atsi_count = ats_count;
408 memcpy (dest->atsi, src, ats_count * sizeof (struct GNUNET_ATS_Information));
412 for (c1 = 0; c1 < ats_count; c1++)
414 /* Update existing performance information */
416 for (c2 = 0; c2 < dest->atsi_count; c2++)
418 if (src[c1].type == dest->atsi[c2].type)
420 if (src[c1].value != dest->atsi[c2].value)
422 dest->atsi[c2].value = src[c1].value;
429 if (GNUNET_NO == found)
431 add_atsi[add_atsi_count] = src[c1];
436 if (add_atsi_count > 0)
438 /* Extend ats performance information */
439 tmp_atsi = GNUNET_malloc ((dest->atsi_count + add_atsi_count) *
440 sizeof (sizeof (struct GNUNET_ATS_Information)));
441 memcpy (tmp_atsi, dest->atsi, dest->atsi_count * sizeof (struct GNUNET_ATS_Information));
442 memcpy (&tmp_atsi[dest->atsi_count], add_atsi, add_atsi_count * sizeof (struct GNUNET_ATS_Information));
443 GNUNET_free (dest->atsi);
444 dest->atsi = tmp_atsi;
445 dest->atsi_count = dest->atsi_count + add_atsi_count;
453 * Free the given address
455 * @param addr address to destroy
458 free_address (struct ATS_Address *addr)
460 GNUNET_free (addr->plugin);
461 GNUNET_free_non_null (addr->atsi);
466 * Create a ATS_address with the given information
469 * @param plugin_name plugin
470 * @param plugin_addr address
471 * @param plugin_addr_len address length
472 * @param session_id session
473 * @return the ATS_Address
475 static struct ATS_Address *
476 create_address (const struct GNUNET_PeerIdentity *peer,
477 const char *plugin_name,
478 const void *plugin_addr, size_t plugin_addr_len,
481 struct ATS_Address *aa = NULL;
483 aa = GNUNET_malloc (sizeof (struct ATS_Address) + plugin_addr_len);
485 aa->addr_len = plugin_addr_len;
487 memcpy (&aa[1], plugin_addr, plugin_addr_len);
488 aa->plugin = GNUNET_strdup (plugin_name);
489 aa->session_id = session_id;
490 aa->active = GNUNET_NO;
491 aa->used = GNUNET_NO;
492 aa->solver_information = NULL;
495 aa->assigned_bw_in = GNUNET_BANDWIDTH_value_init(0);
496 aa->assigned_bw_out = GNUNET_BANDWIDTH_value_init(0);
502 * Destroy the given address.
504 * @param handle the address handle
505 * @param addr address to destroy
506 * @return GNUNET_YES if bandwidth allocations should be recalcualted
509 destroy_address (struct GAS_Addresses_Handle *handle, struct ATS_Address *addr)
514 GNUNET_assert (GNUNET_YES ==
515 GNUNET_CONTAINER_multihashmap_remove (handle->addresses,
516 &addr->peer.hashPubKey,
523 struct CompareAddressContext
525 const struct ATS_Address *search;
527 /* exact_address != NULL if address and session is equal */
528 struct ATS_Address *exact_address;
529 /* exact_address != NULL if address and session is 0 */
530 struct ATS_Address *base_address;
536 * @param cls a CompareAddressContext containin the source address
538 * @param value the address to compare with
539 * @return GNUNET_YES to continue, GNUNET_NO if address is founce
543 compare_address_it (void *cls, const struct GNUNET_HashCode * key, void *value)
545 struct CompareAddressContext *cac = cls;
546 struct ATS_Address *aa = value;
548 /* Find an matching exact address:
551 * aa->addr_len == cac->search->addr_len
552 * aa->plugin == cac->search->plugin
553 * aa->addr == cac->search->addr
554 * aa->session == cac->search->session
556 * return as exact address
558 if ((aa->addr_len == cac->search->addr_len) && (0 == strcmp (aa->plugin, cac->search->plugin)))
560 if ((0 == memcmp (aa->addr, cac->search->addr, aa->addr_len)) && (aa->session_id == cac->search->session_id))
561 cac->exact_address = aa;
564 /* Find an matching base address:
568 * aa->session_id == 0
571 * aa->addr_len == cac->search->addr_len
572 * aa->plugin == cac->search->plugin
573 * aa->addr == cac->search->addr
575 * return as base address
577 if ((aa->addr_len == cac->search->addr_len) && (0 == strcmp (aa->plugin, cac->search->plugin)))
579 if ((0 == memcmp (aa->addr, cac->search->addr, aa->addr_len)) && (aa->session_id == 0))
580 cac->base_address = aa;
583 /* Find an matching exact address based on session:
587 * cac->search->addr_len == 0
590 * aa->plugin == cac->search->plugin
591 * aa->session_id == cac->search->session_id
593 * return as exact address
595 if (0 == cac->search->addr_len)
597 if ((0 == strcmp (aa->plugin, cac->search->plugin)) && (aa->session_id == cac->search->session_id))
598 cac->exact_address = aa;
601 if (cac->exact_address == NULL)
602 return GNUNET_YES; /* Continue iteration to find exact address */
604 return GNUNET_NO; /* Stop iteration since we have an exact address */
609 * Find an existing equivalent address record.
610 * Compares by peer identity and network address OR by session ID
611 * (one of the two must match).
613 * @param handle the address handle
614 * @param peer peer to lookup addresses for
615 * @param addr existing address record
616 * @return existing address record, NULL for none
619 find_equivalent_address (struct GAS_Addresses_Handle *handle,
620 const struct GNUNET_PeerIdentity *peer,
621 const struct ATS_Address *addr)
623 struct CompareAddressContext cac;
625 cac.exact_address = NULL;
626 cac.base_address = NULL;
628 GNUNET_CONTAINER_multihashmap_get_multiple (handle->addresses, &peer->hashPubKey,
629 &compare_address_it, &cac);
631 if (cac.exact_address == NULL)
632 return cac.base_address;
633 return cac.exact_address;
638 * Lookup an ATS address by the address properties and session or return an
639 * equivalent address with a session == 0
641 * @param handle the address handle to use
643 * @param plugin_name transport plugin name
644 * @param plugin_addr plugin address
645 * @param plugin_addr_len length of the plugin address
646 * @param session_id session id, can be 0
647 * @param atsi performance information for this address
648 * @param atsi_count number of performance information contained
649 * @return an ATS_address or NULL
652 static struct ATS_Address *
653 lookup_address (struct GAS_Addresses_Handle *handle,
654 const struct GNUNET_PeerIdentity *peer,
655 const char *plugin_name,
656 const void *plugin_addr,
657 size_t plugin_addr_len,
659 const struct GNUNET_ATS_Information *atsi,
662 struct ATS_Address *aa;
663 struct ATS_Address *ea;
665 aa = create_address (peer,
667 plugin_addr, plugin_addr_len,
670 /* Get existing address or address with session == 0 */
671 ea = find_equivalent_address (handle, peer, aa);
677 else if (ea->session_id != session_id)
685 * Extract an ATS performance info from an address
687 * @param address the address
688 * @param type the type to extract in HBO
689 * @return the value in HBO or UINT32_MAX in HBO if value does not exist
692 get_performance_info (struct ATS_Address *address, uint32_t type)
695 GNUNET_assert (NULL != address);
697 if ((NULL == address->atsi) || (0 == address->atsi_count))
700 for (c1 = 0; c1 < address->atsi_count; c1++)
702 if (ntohl(address->atsi[c1].type) == type)
703 return ntohl(address->atsi[c1].value);
710 * Add a new address for a peer.
712 * @param handle the address handle to use
714 * @param plugin_name transport plugin name
715 * @param plugin_addr plugin address
716 * @param plugin_addr_len length of the plugin address
717 * @param session_id session id, can be 0
718 * @param atsi performance information for this address
719 * @param atsi_count number of performance information contained
722 GAS_addresses_add (struct GAS_Addresses_Handle *handle,
723 const struct GNUNET_PeerIdentity *peer,
724 const char *plugin_name, const void *plugin_addr,
725 size_t plugin_addr_len, uint32_t session_id,
726 const struct GNUNET_ATS_Information *atsi,
729 struct ATS_Address *aa;
730 struct ATS_Address *ea;
733 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
734 "Received `%s' for peer `%s'\n",
738 if (GNUNET_NO == handle->running)
741 GNUNET_assert (NULL != handle->addresses);
743 aa = create_address (peer, plugin_name, plugin_addr, plugin_addr_len,
745 disassemble_ats_information (atsi, atsi_count, aa);
747 /* Get existing address or address with session == 0 */
748 ea = find_equivalent_address (handle, peer, aa);
751 /* We have a new address */
752 GNUNET_assert (GNUNET_OK ==
753 GNUNET_CONTAINER_multihashmap_put (handle->addresses,
754 &peer->hashPubKey, aa,
755 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
756 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Added new address for peer `%s' session id %u, %p\n",
757 GNUNET_i2s (peer), session_id, aa);
758 addr_net = get_performance_info (aa, GNUNET_ATS_NETWORK_TYPE);
759 if (UINT32_MAX == addr_net)
760 addr_net = GNUNET_ATS_NET_UNSPECIFIED;
761 /* Tell solver about new address */
762 handle->s_add (handle->solver, handle->addresses, aa, addr_net);
763 /* Notify performance clients about new address */
764 GAS_performance_notify_all_clients (&aa->peer,
766 aa->addr, aa->addr_len,
768 aa->atsi, aa->atsi_count,
774 GNUNET_free (aa->plugin);
775 GNUNET_free_non_null (aa->atsi);
778 if (ea->session_id != 0)
780 /* This address with the same session is already existing
781 * Should not happen */
782 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
783 "Added already existing address for peer `%s' `%s' %p with new session %u\n",
784 GNUNET_i2s (peer), plugin_name, session_id);
789 /* We have an address without an session, update this address */
791 /* Notify solver about update with atsi information and session */
792 handle->s_update (handle->solver, handle->addresses, ea, session_id, ea->used, atsi, atsi_count);
795 ea->session_id = session_id;
796 if (GNUNET_YES == disassemble_ats_information (atsi, atsi_count, ea))
798 GAS_performance_notify_all_clients (&aa->peer,
800 aa->addr, aa->addr_len,
802 aa->atsi, aa->atsi_count,
806 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
807 "Updated existing address for peer `%s' %p with new session %u\n",
808 GNUNET_i2s (peer), ea, session_id);
813 * Update an address with a session or performance information for a peer.
815 * If an address was added without a session it will be updated with the
818 * @param handle the address handle to use
820 * @param plugin_name transport plugin name
821 * @param plugin_addr plugin address
822 * @param plugin_addr_len length of the plugin address
823 * @param session_id session id, can be 0
824 * @param atsi performance information for this address
825 * @param atsi_count number of performance information contained
828 GAS_addresses_update (struct GAS_Addresses_Handle *handle,
829 const struct GNUNET_PeerIdentity *peer,
830 const char *plugin_name, const void *plugin_addr,
831 size_t plugin_addr_len, uint32_t session_id,
832 const struct GNUNET_ATS_Information *atsi,
835 struct ATS_Address *aa;
837 if (GNUNET_NO == handle->running)
840 GNUNET_assert (NULL != handle->addresses);
842 /* Get existing address */
843 aa = lookup_address (handle, peer, plugin_name, plugin_addr, plugin_addr_len,
844 session_id, atsi, atsi_count);
847 /* GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Tried to update unknown address for peer `%s' `%s' session id %u\n", */
848 /* GNUNET_i2s (peer), plugin_name, session_id); */
849 /* GNUNET_break (0); */
853 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
854 "Received `%s' for peer `%s' address \n",
856 GNUNET_i2s (peer), aa);
858 /* Tell solver about update */
859 handle->s_update (handle->solver, handle->addresses, aa, session_id, aa->used, atsi, atsi_count);
862 if (GNUNET_YES == disassemble_ats_information (atsi, atsi_count, aa))
864 /* Notify performance clients about updated address */
865 GAS_performance_notify_all_clients (&aa->peer,
867 aa->addr, aa->addr_len,
869 aa->atsi, aa->atsi_count,
876 struct DestroyContext
878 struct ATS_Address *aa;
880 struct GAS_Addresses_Handle *handle;
883 * GNUNET_NO : full address
884 * GNUNET_YES : just session
893 * If session != 0, just the session is deleted, the address itself still exists
894 * If session == 0, remove full address
895 * If session == 0 and addrlen == 0, destroy inbound address
899 * @param value the 'struct ATS_Address'
900 * @return GNUNET_OK (continue to iterate)
903 destroy_by_session_id (void *cls, const struct GNUNET_HashCode * key, void *value)
905 struct DestroyContext *dc = cls;
906 struct GAS_Addresses_Handle *handle = dc->handle;
907 const struct ATS_Address *des = dc->aa;
908 struct ATS_Address *aa = value;
910 GNUNET_assert (0 == memcmp (&aa->peer, &des->peer,
911 sizeof (struct GNUNET_PeerIdentity)));
914 if (des->session_id == 0)
916 /* Session == 0, remove full address */
917 if ((0 == strcmp (des->plugin, aa->plugin)) &&
918 (aa->addr_len == des->addr_len) &&
919 (0 == memcmp (des->addr, aa->addr, aa->addr_len)))
922 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
923 "Deleting full address for peer `%s' session %u %p\n",
924 GNUNET_i2s (&aa->peer), aa->session_id, aa);
926 /* Notify solver about deletion */
927 handle->s_del (handle->solver, handle->addresses, aa, GNUNET_NO);
928 destroy_address (handle, aa);
929 dc->result = GNUNET_NO;
930 return GNUNET_OK; /* Continue iteration */
935 /* Session != 0, just remove session */
936 if (aa->session_id != des->session_id)
937 return GNUNET_OK; /* irrelevant */
939 if ((aa->session_id != 0) &&
940 (0 != strcmp (des->plugin, aa->plugin)))
942 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
943 "Different plugins during removal: `%s' vs `%s' \n",
944 des->plugin, aa->plugin);
949 if (aa->addr_len == 0)
951 /* Inbound connection died, delete full address */
952 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
953 "Deleting inbound address for peer `%s': `%s' session %u\n",
954 GNUNET_i2s (&aa->peer), aa->plugin, aa->session_id);
956 /* Notify solver about deletion */
957 handle->s_del (handle->solver, handle->addresses, aa, GNUNET_NO);
958 destroy_address (handle, aa);
959 dc->result = GNUNET_NO;
960 return GNUNET_OK; /* Continue iteration */
965 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
966 "Deleting session for peer `%s': `%s' %u\n",
967 GNUNET_i2s (&aa->peer), aa->plugin, aa->session_id);
968 /* Notify solver to delete session */
969 handle->s_del (handle->solver, handle->addresses, aa, GNUNET_YES);
979 * Remove an address or just a session for a peer.
981 * @param handle the address handle to use
983 * @param plugin_name transport plugin name
984 * @param plugin_addr plugin address
985 * @param plugin_addr_len length of the plugin address
986 * @param session_id session id, can be 0
989 GAS_addresses_destroy (struct GAS_Addresses_Handle *handle,
990 const struct GNUNET_PeerIdentity *peer,
991 const char *plugin_name,
992 const void *plugin_addr,
993 size_t plugin_addr_len,
996 struct ATS_Address *ea;
997 struct DestroyContext dc;
999 if (GNUNET_NO == handle->running)
1002 /* Get existing address */
1003 ea = lookup_address (handle, peer, plugin_name, plugin_addr, plugin_addr_len,
1004 session_id, NULL, 0);
1006 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1007 "Received `%s' for peer `%s' address %p session %u\n",
1009 GNUNET_i2s (peer), ea, session_id);
1013 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tried to destroy unknown address for peer `%s' `%s' session id %u\n",
1014 GNUNET_i2s (peer), plugin_name, session_id);
1018 GNUNET_break (0 < strlen (plugin_name));
1020 dc.aa = create_address (peer, plugin_name, plugin_addr, plugin_addr_len, session_id);
1022 GNUNET_CONTAINER_multihashmap_get_multiple (handle->addresses, &peer->hashPubKey,
1023 &destroy_by_session_id, &dc);
1024 free_address (dc.aa);
1029 * Notification about active use of an address.
1030 * in_use == GNUNET_YES:
1031 * This address is used to maintain an active connection with a peer.
1032 * in_use == GNUNET_NO:
1033 * This address is no longer used to maintain an active connection with a peer.
1035 * Note: can only be called with in_use == GNUNET_NO if called with GNUNET_YES
1038 * @param handle the address handle to use
1040 * @param plugin_name transport plugin name
1041 * @param plugin_addr plugin address
1042 * @param plugin_addr_len length of the plugin address
1043 * @param session_id session id, can be 0
1044 * @param in_use GNUNET_YES if GNUNET_NO
1045 * @return GNUNET_SYSERR on failure (address unknown ...)
1048 GAS_addresses_in_use (struct GAS_Addresses_Handle *handle,
1049 const struct GNUNET_PeerIdentity *peer,
1050 const char *plugin_name,
1051 const void *plugin_addr,
1052 size_t plugin_addr_len,
1053 uint32_t session_id,
1056 struct ATS_Address *ea;
1058 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1059 "Received `%s' for peer `%s'\n",
1063 if (GNUNET_NO == handle->running)
1064 return GNUNET_SYSERR;
1066 ea = lookup_address (handle, peer, plugin_name,
1067 plugin_addr, plugin_addr_len,
1068 session_id, NULL, 0);
1071 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1072 "Trying to set unknown address `%s', %s %u %s \n",
1074 plugin_name, session_id,
1075 (GNUNET_NO == in_use) ? "NO" : "YES");
1077 return GNUNET_SYSERR;
1079 if (ea->used == in_use)
1082 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1083 "Address in use called multiple times for peer `%s': %s -> %s \n",
1085 (GNUNET_NO == ea->used) ? "NO" : "YES",
1086 (GNUNET_NO == in_use) ? "NO" : "YES");
1087 return GNUNET_SYSERR;
1090 /* Tell solver about update */
1091 handle->s_update (handle->solver, handle->addresses, ea, session_id, in_use, NULL, 0);
1099 * Cancel address suggestions for a peer
1101 * @param handle the address handle
1102 * @param peer the peer id
1105 GAS_addresses_request_address_cancel (struct GAS_Addresses_Handle *handle,
1106 const struct GNUNET_PeerIdentity *peer)
1108 struct GAS_Addresses_Suggestion_Requests *cur = handle->r_head;
1110 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1111 "Received request: `%s' for peer %s\n", "request_address_cancel", GNUNET_i2s (peer));
1115 if (0 == memcmp (peer, &cur->id, sizeof (cur->id)))
1122 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1123 "No address requests pending for peer `%s', cannot remove!\n", GNUNET_i2s (peer));
1126 handle->s_get_stop (handle->solver, handle->addresses, peer);
1127 GAS_addresses_handle_backoff_reset (handle, peer);
1128 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1129 "Removed request pending for peer `%s\n", GNUNET_i2s (peer));
1130 GNUNET_CONTAINER_DLL_remove (handle->r_head, handle->r_tail, cur);
1136 * Request address suggestions for a peer
1138 * @param handle the address handle
1139 * @param peer the peer id
1142 GAS_addresses_request_address (struct GAS_Addresses_Handle *handle,
1143 const struct GNUNET_PeerIdentity *peer)
1145 struct GAS_Addresses_Suggestion_Requests *cur = handle->r_head;
1146 struct ATS_Address *aa;
1148 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1149 "Received `%s' for peer `%s'\n",
1153 if (GNUNET_NO == handle->running)
1157 if (0 == memcmp (peer, &cur->id, sizeof (cur->id)))
1158 break; /* already suggesting */
1163 cur = GNUNET_malloc (sizeof (struct GAS_Addresses_Suggestion_Requests));
1165 GNUNET_CONTAINER_DLL_insert (handle->r_head, handle->r_tail, cur);
1168 /* Get prefered address from solver */
1169 aa = (struct ATS_Address *) handle->s_get (handle->solver, handle->addresses, peer);
1172 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1173 "Cannot suggest address for peer `%s'\n", GNUNET_i2s (peer));
1177 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1178 "Suggesting address %p for peer `%s'\n", aa, GNUNET_i2s (peer));
1180 GAS_scheduling_transmit_address_suggestion (peer,
1182 aa->addr, aa->addr_len,
1184 aa->atsi, aa->atsi_count,
1185 aa->assigned_bw_out,
1186 aa->assigned_bw_in);
1188 aa->block_interval = GNUNET_TIME_relative_add (aa->block_interval, ATS_BLOCKING_DELTA);
1189 aa->blocked_until = GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get(), aa->block_interval);
1191 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1192 "Address %p ready for suggestion, block interval now %llu \n",
1193 aa, aa->block_interval);
1198 * Iterator to reset address blocking
1200 * @param cls not used
1201 * @param key the peer
1202 * @param value the address to reset
1203 * @return GNUNET_OK to continue
1206 reset_address_it (void *cls, const struct GNUNET_HashCode *key, void *value)
1208 struct ATS_Address *aa = value;
1210 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1211 "Resetting interval for peer `%s' address %p from %llu to 0\n",
1212 GNUNET_i2s (&aa->peer), aa, aa->block_interval);
1214 aa->blocked_until = GNUNET_TIME_UNIT_ZERO_ABS;
1215 aa->block_interval = GNUNET_TIME_UNIT_ZERO;
1221 * Reset suggestion backoff for a peer
1223 * Suggesting addresses is blocked for ATS_BLOCKING_DELTA. Blocking can be
1224 * reset using this function
1226 * @param handle the address handle
1227 * @param peer the peer id
1230 GAS_addresses_handle_backoff_reset (struct GAS_Addresses_Handle *handle,
1231 const struct GNUNET_PeerIdentity *peer)
1233 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1234 "Received `%s' for peer `%s'\n",
1238 GNUNET_break (GNUNET_SYSERR != GNUNET_CONTAINER_multihashmap_get_multiple (handle->addresses,
1246 * Change the preference for a peer
1248 * @param handle the address handle
1249 * @param client the client sending this request
1250 * @param peer the peer id
1251 * @param kind the preference kind to change
1252 * @param score the new preference score
1255 GAS_addresses_change_preference (struct GAS_Addresses_Handle *handle,
1257 const struct GNUNET_PeerIdentity *peer,
1258 enum GNUNET_ATS_PreferenceKind kind,
1261 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1262 "Received `%s' for peer `%s' for client %p\n",
1263 "CHANGE PREFERENCE",
1264 GNUNET_i2s (peer), client);
1266 if (GNUNET_NO == handle->running)
1269 if (GNUNET_NO == GNUNET_CONTAINER_multihashmap_contains (handle->addresses,
1272 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1273 "Received `%s' for unknown peer `%s' from client %p\n",
1274 "CHANGE PREFERENCE",
1275 GNUNET_i2s (peer), client);
1279 /* Tell solver about update */
1280 handle->s_pref (handle->solver, client, peer, kind, score);
1285 * Load quotas for networks from configuration
1287 * @param cfg configuration handle
1288 * @param out_dest where to write outbound quotas
1289 * @param in_dest where to write inbound quotas
1290 * @param dest_length length of inbound and outbound arrays
1291 * @return number of networks loaded
1294 load_quotas (const struct GNUNET_CONFIGURATION_Handle *cfg, unsigned long long *out_dest, unsigned long long *in_dest, int dest_length)
1296 char *network_str[GNUNET_ATS_NetworkTypeCount] = GNUNET_ATS_NetworkTypeString;
1297 char * entry_in = NULL;
1298 char * entry_out = NULL;
1299 char * quota_out_str;
1300 char * quota_in_str;
1304 for (c = 0; (c < GNUNET_ATS_NetworkTypeCount) && (c < dest_length); c++)
1308 GNUNET_asprintf (&entry_out, "%s_QUOTA_OUT", network_str[c]);
1309 GNUNET_asprintf (&entry_in, "%s_QUOTA_IN", network_str[c]);
1312 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string(cfg, "ats", entry_out, "a_out_str))
1315 if (0 == strcmp(quota_out_str, GNUNET_ATS_MaxBandwidthString))
1317 out_dest[c] = GNUNET_ATS_MaxBandwidth;
1320 if ((GNUNET_NO == res) && (GNUNET_OK == GNUNET_STRINGS_fancy_size_to_bytes (quota_out_str, &out_dest[c])))
1322 if ((GNUNET_NO == res) && (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number (cfg, "ats", entry_out, &out_dest[c])))
1325 if (GNUNET_NO == res)
1327 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Could not load quota for network `%s': `%s', assigning default bandwidth %llu\n"),
1328 network_str[c], quota_out_str, GNUNET_ATS_DefaultBandwidth);
1329 out_dest[c] = GNUNET_ATS_DefaultBandwidth;
1333 GNUNET_log (GNUNET_ERROR_TYPE_INFO, _("Outbound quota configure for network `%s' is %llu\n"),
1334 network_str[c], out_dest[c]);
1336 GNUNET_free (quota_out_str);
1340 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, _("No outbound quota configured for network `%s', assigning default bandwidth %llu\n"),
1341 network_str[c], GNUNET_ATS_DefaultBandwidth);
1342 out_dest[c] = GNUNET_ATS_DefaultBandwidth;
1346 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string(cfg, "ats", entry_in, "a_in_str))
1349 if (0 == strcmp(quota_in_str, GNUNET_ATS_MaxBandwidthString))
1351 in_dest[c] = GNUNET_ATS_MaxBandwidth;
1354 if ((GNUNET_NO == res) && (GNUNET_OK == GNUNET_STRINGS_fancy_size_to_bytes (quota_in_str, &in_dest[c])))
1356 if ((GNUNET_NO == res) && (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number (cfg, "ats", entry_in, &in_dest[c])))
1359 if (GNUNET_NO == res)
1361 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Could not load quota for network `%s': `%s', assigning default bandwidth %llu\n"),
1362 network_str[c], quota_in_str, GNUNET_ATS_DefaultBandwidth);
1363 in_dest[c] = GNUNET_ATS_DefaultBandwidth;
1367 GNUNET_log (GNUNET_ERROR_TYPE_INFO, _("Inbound quota configured for network `%s' is %llu\n"),
1368 network_str[c], in_dest[c]);
1370 GNUNET_free (quota_in_str);
1374 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, _("No outbound quota configure for network `%s', assigning default bandwidth %llu\n"),
1375 network_str[c], GNUNET_ATS_DefaultBandwidth);
1376 out_dest[c] = GNUNET_ATS_DefaultBandwidth;
1378 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]);
1379 GNUNET_free (entry_out);
1380 GNUNET_free (entry_in);
1382 return GNUNET_ATS_NetworkTypeCount;
1387 * Callback for solver to notify about assignment changes
1389 * @param cls the GAS_Addresses_Handle
1390 * @param address the address with changes
1393 bandwidth_changed_cb (void *cls, struct ATS_Address *address)
1395 struct GAS_Addresses_Handle *handle = cls;
1396 struct GAS_Addresses_Suggestion_Requests *cur;
1398 GNUNET_assert (handle != NULL);
1399 GNUNET_assert (address != NULL);
1401 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Bandwidth assignment changed for peer %s \n", GNUNET_i2s(&address->peer));
1403 /* Notify performance clients about changes to address */
1404 GAS_performance_notify_all_clients (&address->peer,
1406 address->addr, address->addr_len,
1407 address->session_id,
1408 address->atsi, address->atsi_count,
1409 address->assigned_bw_out,
1410 address->assigned_bw_in);
1411 cur = handle->r_head;
1414 if (0 == memcmp (&address->peer, &cur->id, sizeof (cur->id)))
1415 break; /* we have an address request pending*/
1420 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1421 "Nobody is interested in peer `%s' :(\n",GNUNET_i2s (&address->peer));
1425 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1426 "Sending bandwidth update for peer `%s'\n",GNUNET_i2s (&address->peer));
1428 /* *Notify scheduling clients about suggestion */
1429 GAS_scheduling_transmit_address_suggestion (&address->peer,
1431 address->addr, address->addr_len,
1432 address->session_id,
1433 address->atsi, address->atsi_count,
1434 address->assigned_bw_out,
1435 address->assigned_bw_in);
1440 * Initialize address subsystem. The addresses subsystem manages the addresses
1441 * known and current performance information. It has a solver component
1442 * responsible for the resource allocation. It tells the solver about changes
1443 * and receives updates when the solver changes the ressource allocation.
1445 * @param cfg configuration to use
1446 * @param stats the statistics handle to use
1447 * @return an address handle
1449 struct GAS_Addresses_Handle *
1450 GAS_addresses_init (const struct GNUNET_CONFIGURATION_Handle *cfg,
1451 const struct GNUNET_STATISTICS_Handle *stats)
1453 struct GAS_Addresses_Handle *ah;
1454 int quotas[GNUNET_ATS_NetworkTypeCount] = GNUNET_ATS_NetworkType;
1455 unsigned long long quotas_in[GNUNET_ATS_NetworkTypeCount];
1456 unsigned long long quotas_out[GNUNET_ATS_NetworkTypeCount];
1461 ah = GNUNET_malloc (sizeof (struct GAS_Addresses_Handle));
1462 ah->running = GNUNET_NO;
1464 ah->stat = (struct GNUNET_STATISTICS_Handle *) stats;
1465 /* Initialize the addresses database */
1466 ah->addresses = GNUNET_CONTAINER_multihashmap_create (128, GNUNET_NO);
1467 GNUNET_assert (NULL != ah->addresses);
1469 /* Figure out configured solution method */
1470 if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string (cfg, "ats", "MODE", &mode_str))
1472 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "No ressource assignment method configured, using simplistic approch\n");
1473 ah->ats_mode = MODE_SIMPLISTIC;
1477 for (c = 0; c < strlen (mode_str); c++)
1478 mode_str[c] = toupper (mode_str[c]);
1479 if (0 == strcmp (mode_str, "SIMPLISTIC"))
1481 ah->ats_mode = MODE_SIMPLISTIC;
1483 else if (0 == strcmp (mode_str, "MLP"))
1485 ah->ats_mode = MODE_MLP;
1487 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Assignment method `%s' configured, but GLPK is not availabe, please install \n", mode_str);
1488 ah->ats_mode = MODE_SIMPLISTIC;
1493 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Invalid ressource assignment method `%s' configured, using simplistic approch\n", mode_str);
1494 ah->ats_mode = MODE_SIMPLISTIC;
1496 GNUNET_free (mode_str);
1498 /* Start configured solution method */
1499 switch (ah->ats_mode)
1502 /* Init the MLP solver with default values */
1504 ah->ats_mode = MODE_MLP;
1505 ah->s_init = &GAS_mlp_init;
1506 ah->s_add = &GAS_mlp_address_add;
1507 ah->s_update = &GAS_mlp_address_update;
1508 ah->s_get = &GAS_mlp_get_preferred_address;
1509 ah->s_get_stop = &GAS_mlp_stop_get_preferred_address;
1510 ah->s_pref = &GAS_mlp_address_change_preference;
1511 ah->s_del = &GAS_mlp_address_delete;
1512 ah->s_done = &GAS_mlp_done;
1518 case MODE_SIMPLISTIC:
1519 /* Init the simplistic solver with default values */
1520 ah->ats_mode = MODE_SIMPLISTIC;
1521 ah->s_init = &GAS_simplistic_init;
1522 ah->s_add = &GAS_simplistic_address_add;
1523 ah->s_update = &GAS_simplistic_address_update;
1524 ah->s_get = &GAS_simplistic_get_preferred_address;
1525 ah->s_get_stop = &GAS_simplistic_stop_get_preferred_address;
1526 ah->s_pref = &GAS_simplistic_address_change_preference;
1527 ah->s_del = &GAS_simplistic_address_delete;
1528 ah->s_done = &GAS_simplistic_done;
1529 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "ATS started in %s mode\n", "SIMPLISTIC");
1536 GNUNET_assert (NULL != ah->s_init);
1537 GNUNET_assert (NULL != ah->s_add);
1538 GNUNET_assert (NULL != ah->s_update);
1539 GNUNET_assert (NULL != ah->s_get);
1540 GNUNET_assert (NULL != ah->s_get_stop);
1541 GNUNET_assert (NULL != ah->s_pref);
1542 GNUNET_assert (NULL != ah->s_del);
1543 GNUNET_assert (NULL != ah->s_done);
1545 quota_count = load_quotas(cfg, quotas_in, quotas_out, GNUNET_ATS_NetworkTypeCount);
1547 ah->solver = ah->s_init (cfg, stats, quotas, quotas_in, quotas_out, quota_count, &bandwidth_changed_cb, ah);
1548 if (NULL == ah->solver)
1550 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Failed to initialize solver!\n");
1555 /* up and running */
1556 ah->running = GNUNET_YES;
1562 * Free memory of address.
1565 * @param key peer identity (unused)
1566 * @param value the 'struct ATS_Address' to free
1567 * @return GNUNET_OK (continue to iterate)
1570 free_address_it (void *cls, const struct GNUNET_HashCode * key, void *value)
1572 struct GAS_Addresses_Handle *handle = cls;
1573 struct ATS_Address *aa = value;
1574 handle->s_del (handle->solver, handle->addresses, aa, GNUNET_NO);
1575 destroy_address (handle, aa);
1581 * Remove all addresses
1583 * @param handle the address handle to use
1586 GAS_addresses_destroy_all (struct GAS_Addresses_Handle *handle)
1588 if (GNUNET_NO == handle->running)
1591 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1595 if (handle->addresses != NULL)
1596 GNUNET_CONTAINER_multihashmap_iterate (handle->addresses, &free_address_it, handle);
1601 * Shutdown address subsystem.
1603 * @param handle the address handle to shutdown
1606 GAS_addresses_done (struct GAS_Addresses_Handle *handle)
1608 struct GAS_Addresses_Suggestion_Requests *cur;
1610 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1611 "Shutting down addresses\n");
1612 GNUNET_assert (NULL != handle);
1613 GAS_addresses_destroy_all (handle);
1614 handle->running = GNUNET_NO;
1615 GNUNET_CONTAINER_multihashmap_destroy (handle->addresses);
1616 handle->addresses = NULL;
1617 while (NULL != (cur = handle->r_head))
1619 GNUNET_CONTAINER_DLL_remove (handle->r_head, handle->r_tail, cur);
1622 handle->s_done (handle->solver);
1623 GNUNET_free (handle);
1624 /* Stop configured solution method */
1629 struct PeerIteratorContext
1631 GNUNET_ATS_Peer_Iterator it;
1633 struct GNUNET_CONTAINER_MultiHashMap *peers_returned;
1638 * Iterator to iterate over all peers
1640 * @param cls a PeerIteratorContext
1641 * @param key the peer id
1642 * @param value the ATS_address
1643 * @return GNUNET_OK to continue
1647 const struct GNUNET_HashCode * key,
1650 struct PeerIteratorContext *ip_ctx = cls;
1651 struct GNUNET_PeerIdentity tmp;
1653 if (GNUNET_NO == GNUNET_CONTAINER_multihashmap_contains(ip_ctx->peers_returned, key))
1655 GNUNET_CONTAINER_multihashmap_put(ip_ctx->peers_returned, key, NULL, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1656 tmp.hashPubKey = (*key);
1657 ip_ctx->it (ip_ctx->it_cls, &tmp);
1665 * Return information all peers currently known to ATS
1667 * @param handle the address handle to use
1668 * @param p_it the iterator to call for every peer
1669 * @param p_it_cls the closure for the iterator
1672 GAS_addresses_iterate_peers (struct GAS_Addresses_Handle *handle,
1673 GNUNET_ATS_Peer_Iterator p_it,
1676 struct PeerIteratorContext ip_ctx;
1681 GNUNET_assert (NULL != handle->addresses);
1683 size = GNUNET_CONTAINER_multihashmap_size(handle->addresses);
1687 ip_ctx.it_cls = p_it_cls;
1688 ip_ctx.peers_returned = GNUNET_CONTAINER_multihashmap_create (size, GNUNET_NO);
1689 GNUNET_CONTAINER_multihashmap_iterate (handle->addresses, &peer_it, &ip_ctx);
1690 GNUNET_CONTAINER_multihashmap_destroy (ip_ctx.peers_returned);
1692 p_it (p_it_cls, NULL);
1696 struct PeerInfoIteratorContext
1698 GNUNET_ATS_PeerInfo_Iterator it;
1704 * Iterator to iterate over a peer's addresses
1706 * @param cls a PeerInfoIteratorContext
1707 * @param key the peer id
1708 * @param value the ATS_address
1709 * @return GNUNET_OK to continue
1712 peerinfo_it (void *cls,
1713 const struct GNUNET_HashCode * key,
1716 struct PeerInfoIteratorContext *pi_ctx = cls;
1717 struct ATS_Address *addr = (struct ATS_Address *) value;
1719 if (NULL != pi_ctx->it)
1721 pi_ctx->it (pi_ctx->it_cls,
1724 addr->addr, addr->addr_len,
1726 addr->atsi, addr->atsi_count,
1727 addr->assigned_bw_out,
1728 addr->assigned_bw_in);
1735 * Return information all peers currently known to ATS
1737 * @param handle the address handle to use
1738 * @param peer the respective peer
1739 * @param pi_it the iterator to call for every peer
1740 * @param pi_it_cls the closure for the iterator
1743 GAS_addresses_get_peer_info (struct GAS_Addresses_Handle *handle,
1744 const struct GNUNET_PeerIdentity *peer,
1745 GNUNET_ATS_PeerInfo_Iterator pi_it,
1748 struct PeerInfoIteratorContext pi_ctx;
1749 struct GNUNET_BANDWIDTH_Value32NBO zero_bw;
1750 GNUNET_assert (NULL != peer);
1751 GNUNET_assert (NULL != handle->addresses);
1753 return; /* does not make sense without callback */
1755 zero_bw = GNUNET_BANDWIDTH_value_init (0);
1757 pi_ctx.it_cls = pi_it_cls;
1759 GNUNET_CONTAINER_multihashmap_get_multiple (handle->addresses, &peer->hashPubKey, &peerinfo_it, &pi_ctx);
1762 pi_it (pi_it_cls, NULL, NULL, NULL, 0, GNUNET_NO, NULL, 0, zero_bw, zero_bw);
1767 /* end of gnunet-service-ats_addresses.c */