2 This file is part of GNUnet.
3 (C) 2011 Christian Grothoff (and other contributing authors)
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13 General Public License for more details.
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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"
41 * Assign each peer an equal amount of bandwidth (bw)
43 * bw_per_peer = bw_total / #active addresses
48 * Use MLP solver to assign bandwidth
53 static struct GNUNET_CONTAINER_MultiHashMap *addresses;
56 static struct GAS_MLP_Handle *mlp;
59 static unsigned long long wan_quota_in;
61 static unsigned long long wan_quota_out;
63 static unsigned int active_addr_count;
69 * Update a bandwidth assignment for a peer. This trivial method currently
70 * simply assigns the same share to all active connections.
74 * @param value the 'struct ATS_Address'
75 * @return GNUNET_OK (continue to iterate)
78 update_bw_it (void *cls, const GNUNET_HashCode * key, void *value)
80 struct ATS_Address *aa = value;
84 if (GNUNET_YES != aa->active)
86 GNUNET_assert (active_addr_count > 0);
87 aa->assigned_bw_in.value__ = htonl (wan_quota_in / active_addr_count);
88 aa->assigned_bw_out.value__ = htonl (wan_quota_out / active_addr_count);
89 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "New bandwidth for peer %s is %u/%u\n",
90 GNUNET_i2s (&aa->peer), ntohl (aa->assigned_bw_in.value__),
91 ntohl (aa->assigned_bw_out.value__));
92 GAS_scheduling_transmit_address_suggestion (&aa->peer, aa->plugin, aa->addr,
93 aa->addr_len, aa->session_id,
94 aa->ats, aa->ats_count,
97 GAS_reservations_set_bandwidth (&aa->peer, aa->assigned_bw_in);
98 GAS_performance_notify_clients (&aa->peer, aa->plugin, aa->addr, aa->addr_len,
99 aa->ats, aa->ats_count, aa->assigned_bw_out,
106 * Some (significant) input changed, recalculate bandwidth assignment
110 recalculate_assigned_bw ()
112 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
113 "Recalculating bandwidth for all active connections\n");
114 GNUNET_STATISTICS_update (GSA_stats, "# bandwidth recalculations performed",
116 GNUNET_STATISTICS_set (GSA_stats, "# active addresses", active_addr_count,
118 GNUNET_CONTAINER_multihashmap_iterate (addresses, &update_bw_it, NULL);
122 * Free the given address
123 * @param addr address to destroy
126 free_address (struct ATS_Address *addr)
128 GNUNET_free_non_null (addr->ats);
129 GNUNET_free (addr->plugin);
134 * Create a ATS_address with the given information
136 * @param plugin_name plugin
137 * @param plugin_addr address
138 * @param plugin_addr_len address length
139 * @param session_id session
140 * @return the ATS_Address
142 static struct ATS_Address *
143 create_address (const struct GNUNET_PeerIdentity *peer,
144 const char *plugin_name,
145 const void *plugin_addr, size_t plugin_addr_len,
148 struct ATS_Address *aa = NULL;
150 aa = GNUNET_malloc (sizeof (struct ATS_Address) + plugin_addr_len);
152 aa->addr_len = plugin_addr_len;
154 memcpy (&aa[1], plugin_addr, plugin_addr_len);
155 aa->plugin = GNUNET_strdup (plugin_name);
156 aa->session_id = session_id;
157 aa->mlp_information = NULL;
165 * Destroy the given address.
167 * @param addr address to destroy
168 * @return GNUNET_YES if bandwidth allocations should be recalcualted
171 destroy_address (struct ATS_Address *addr)
176 GNUNET_assert (GNUNET_YES ==
177 GNUNET_CONTAINER_multihashmap_remove (addresses,
178 &addr->peer.hashPubKey,
183 GAS_mlp_address_delete (mlp, addresses, addr);
186 if (GNUNET_YES == addr->active)
189 addr->active = GNUNET_NO;
197 struct CompareAddressContext
199 const struct ATS_Address *search;
200 struct ATS_Address *result;
205 compare_address_it (void *cls, const GNUNET_HashCode * key, void *value)
207 struct CompareAddressContext *cac = cls;
208 struct ATS_Address *aa = value;
210 if (((aa->addr_len != cac->search->addr_len) ||
211 (0 != strcmp (aa->plugin, cac->search->plugin)) ||
212 (0 != memcmp (aa->addr, cac->search->addr, aa->addr_len))) &&
213 ((aa->session_id != cac->search->session_id) ||
214 (cac->search->session_id == 0)))
222 * Find an existing equivalent address record.
223 * Compares by peer identity and network address OR by session ID
224 * (one of the two must match).
226 * @param peer peer to lookup addresses for
227 * @param addr existing address record
228 * @return existing address record, NULL for none
231 find_address (const struct GNUNET_PeerIdentity *peer,
232 const struct ATS_Address *addr)
234 struct CompareAddressContext cac;
238 GNUNET_CONTAINER_multihashmap_get_multiple (addresses, &peer->hashPubKey,
239 &compare_address_it, &cac);
245 GAS_addresses_update (const struct GNUNET_PeerIdentity *peer,
246 const char *plugin_name, const void *plugin_addr,
247 size_t plugin_addr_len, uint32_t session_id,
248 const struct GNUNET_ATS_Information *atsi,
251 struct ATS_Address *aa;
252 struct ATS_Address *old;
255 aa = create_address (peer,
257 plugin_addr, plugin_addr_len,
260 aa->mlp_information = NULL;
261 aa->ats = GNUNET_malloc (atsi_count * sizeof (struct GNUNET_ATS_Information));
262 aa->ats_count = atsi_count;
263 memcpy (aa->ats, atsi, atsi_count * sizeof (struct GNUNET_ATS_Information));
265 old = find_address (peer, aa);
268 GNUNET_assert (GNUNET_OK ==
269 GNUNET_CONTAINER_multihashmap_put (addresses,
270 &peer->hashPubKey, aa,
271 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
272 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Added new address for peer `%s' %X\n",
273 GNUNET_i2s (peer), aa);
278 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
279 "Updated existing address for peer `%s' %X \n",
280 GNUNET_i2s (peer), old);
281 GNUNET_free_non_null (old->ats);
282 old->session_id = session_id;
286 old->ats_count = aa->ats_count;
287 GNUNET_free (aa->plugin);
290 for (i = 0; i < atsi_count; i++)
291 switch (ntohl (atsi[i].type))
293 case GNUNET_ATS_UTILIZATION_UP:
294 old->atsp_utilization_out.value__ = atsi[i].value;
296 case GNUNET_ATS_UTILIZATION_DOWN:
297 old->atsp_utilization_in.value__ = atsi[i].value;
299 case GNUNET_ATS_QUALITY_NET_DELAY:
300 old->atsp_latency.rel_value = ntohl (atsi[i].value);
302 case GNUNET_ATS_QUALITY_NET_DISTANCE:
303 old->atsp_distance = ntohl (atsi[i].value);
305 case GNUNET_ATS_COST_WAN:
306 old->atsp_cost_wan = ntohl (atsi[i].value);
308 case GNUNET_ATS_COST_LAN:
309 old->atsp_cost_lan = ntohl (atsi[i].value);
311 case GNUNET_ATS_COST_WLAN:
312 old->atsp_cost_wlan = ntohl (atsi[i].value);
314 case GNUNET_ATS_NETWORK_TYPE:
315 old->atsp_network_type = ntohl (atsi[i].value);
319 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
320 "Received unsupported ATS type %u\n", ntohl (atsi[i].type));
326 GAS_mlp_address_update (mlp, addresses, old);
334 * If session != 0, just the session is deleted, the address itself still exists
335 * If session == 0, remove full address
336 * If session == 0 and addrlen == 0, destroy inbound address
340 * @param value the 'struct ATS_Address'
341 * @return GNUNET_OK (continue to iterate)
344 destroy_by_session_id (void *cls, const GNUNET_HashCode * key, void *value)
346 const struct ATS_Address *info = cls;
347 struct ATS_Address *aa = value;
350 memcmp (&aa->peer, &info->peer,
351 sizeof (struct GNUNET_PeerIdentity)));
352 /* session == 0, remove full address */
353 if ((info->session_id == 0) && (0 == strcmp (info->plugin, aa->plugin)) &&
354 (aa->addr_len == info->addr_len) &&
355 (0 == memcmp (info->addr, aa->addr, aa->addr_len)))
357 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
358 "Deleting address for peer `%s': `%s'\n",
359 GNUNET_i2s (&aa->peer), aa->plugin);
360 if (GNUNET_YES == destroy_address (aa))
361 recalculate_assigned_bw ();
364 /* session != 0, just remove session */
365 if (aa->session_id != info->session_id)
366 return GNUNET_OK; /* irrelevant */
367 if (aa->session_id != 0)
368 GNUNET_break (0 == strcmp (info->plugin, aa->plugin));
372 if (GNUNET_YES == aa->active)
374 aa->active = GNUNET_NO;
376 recalculate_assigned_bw ();
379 /* session == 0 and addrlen == 0 : destroy address */
380 if (aa->addr_len == 0)
382 (void) destroy_address (aa);
386 /* session was set to 0, update address */
389 GAS_mlp_address_update (mlp, addresses, aa);
397 GAS_addresses_destroy (const struct GNUNET_PeerIdentity *peer,
398 const char *plugin_name, const void *plugin_addr,
399 size_t plugin_addr_len, uint32_t session_id)
401 struct ATS_Address *aa;
403 GNUNET_break (0 < strlen (plugin_name));
404 aa = create_address (peer, plugin_name, plugin_addr, plugin_addr_len, session_id);
406 GNUNET_CONTAINER_multihashmap_get_multiple (addresses, &peer->hashPubKey,
407 &destroy_by_session_id, aa);
414 * Find a "good" address to use for a peer. If we already have an existing
415 * address, we stick to it. Otherwise, we pick by lowest distance and then
418 * @param cls the 'struct ATS_Address**' where we store the result
420 * @param value another 'struct ATS_Address*' to consider using
421 * @return GNUNET_OK (continue to iterate)
424 find_address_it (void *cls, const GNUNET_HashCode * key, void *value)
426 struct ATS_Address **ap = cls;
427 struct ATS_Address *aa = (struct ATS_Address *) value;
428 struct ATS_Address *ab = *ap;
435 if ((ntohl (ab->assigned_bw_in.value__) == 0) &&
436 (ntohl (aa->assigned_bw_in.value__) > 0))
438 /* stick to existing connection */
442 if (ab->atsp_distance > aa->atsp_distance)
444 /* user shorter distance */
448 if (ab->atsp_latency.rel_value > aa->atsp_latency.rel_value)
450 /* user lower latency */
460 GAS_addresses_in_use (const struct GNUNET_PeerIdentity *peer,
461 const char *plugin_name, const void *plugin_addr,
462 size_t plugin_addr_len, uint32_t session_id, int in_use)
465 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
466 "Received `%s' message for peer `%s': %i\n", "ADDRESS_IN_USE",
467 GNUNET_i2s (peer), in_use);
470 struct ATS_Address *aa;
471 struct ATS_Address *old;
473 aa = create_address(peer, plugin_name, plugin_addr, plugin_addr_len, session_id);
474 old = find_address (peer, aa);
477 GNUNET_assert (old != NULL);
478 GNUNET_assert (in_use != old->used);
483 GAS_mlp_address_update (mlp, addresses, old);
488 GAS_addresses_request_address (const struct GNUNET_PeerIdentity *peer)
490 struct ATS_Address *aa;
493 GNUNET_CONTAINER_multihashmap_get_multiple (addresses, &peer->hashPubKey,
494 &find_address_it, &aa);
497 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
498 "Cannot suggest address for peer `%s'\n", GNUNET_i2s (peer));
501 if (aa->active == GNUNET_NO)
503 aa->active = GNUNET_YES;
505 recalculate_assigned_bw ();
509 /* just to be sure... */
510 GAS_scheduling_transmit_address_suggestion (peer, aa->plugin, aa->addr,
511 aa->addr_len, aa->session_id,
512 aa->ats, aa->ats_count,
519 // FIXME: this function should likely end up in the LP-subsystem and
520 // not with 'addresses' in the future...
522 GAS_addresses_change_preference (const struct GNUNET_PeerIdentity *peer,
523 enum GNUNET_ATS_PreferenceKind kind,
526 // do nothing for now...
532 * Initialize address subsystem.
534 * @param cfg configuration to use
535 * @param stats the statistics handle to use
538 GAS_addresses_init (const struct GNUNET_CONFIGURATION_Handle *cfg,
539 const struct GNUNET_STATISTICS_Handle *stats)
541 GNUNET_assert (GNUNET_OK ==
542 GNUNET_CONFIGURATION_get_value_size (cfg, "ats",
545 GNUNET_assert (GNUNET_OK ==
546 GNUNET_CONFIGURATION_get_value_size (cfg, "ats",
550 switch (GNUNET_CONFIGURATION_get_value_yesno (cfg, "ats", "MLP"))
556 /* Init the MLP solver with default values */
557 mlp = GAS_mlp_init (cfg, stats, MLP_MAX_EXEC_DURATION, MLP_MAX_ITERATIONS);
561 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "MLP mode was configured, but libglpk is not installed, switching to simple mode");
569 /* No configuration value */
577 addresses = GNUNET_CONTAINER_multihashmap_create (128);
582 * Free memory of address.
585 * @param key peer identity (unused)
586 * @param value the 'struct ATS_Address' to free
587 * @return GNUNET_OK (continue to iterate)
590 free_address_it (void *cls, const GNUNET_HashCode * key, void *value)
592 struct ATS_Address *aa = value;
594 destroy_address (aa);
600 GAS_addresses_destroy_all ()
602 if (addresses != NULL)
603 GNUNET_CONTAINER_multihashmap_iterate (addresses, &free_address_it, NULL);
604 GNUNET_assert (active_addr_count == 0);
609 * Shutdown address subsystem.
612 GAS_addresses_done ()
614 GAS_addresses_destroy_all ();
615 GNUNET_CONTAINER_multihashmap_destroy (addresses);
627 /* end of gnunet-service-ats_addresses.c */