2 This file is part of GNUnet.
3 (C) 2011 Christian Grothoff (and other contributing authors)
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6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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22 * @file ats/gnunet-service-ats_performance.c
23 * @brief ats service, interaction with 'performance' API
24 * @author Matthias Wachs
25 * @author Christian Grothoff
28 #include "gnunet-service-ats.h"
29 #include "gnunet-service-ats_addresses.h"
30 #include "gnunet-service-ats_performance.h"
31 #include "gnunet-service-ats_reservations.h"
36 * We keep clients that are interested in performance in a linked list.
38 struct PerformanceClient
41 * Next in doubly-linked list.
43 struct PerformanceClient *next;
46 * Previous in doubly-linked list.
48 struct PerformanceClient *prev;
51 * Actual handle to the client.
53 struct GNUNET_SERVER_Client *client;
56 * Options for the client.
64 * We keep clients that are interested in performance in a linked list.
66 struct AddressIteration
69 * Actual handle to the client.
71 struct PerformanceClient *pc;
77 unsigned int msg_type;
82 * Head of linked list of all clients to this service.
84 static struct PerformanceClient *pc_head;
87 * Tail of linked list of all clients to this service.
89 static struct PerformanceClient *pc_tail;
92 * Context for sending messages to performance clients.
94 static struct GNUNET_SERVER_NotificationContext *nc;
98 * Find the performance client associated with the given handle.
100 * @param client server handle
101 * @return internal handle
103 static struct PerformanceClient *
104 find_client (struct GNUNET_SERVER_Client *client)
106 struct PerformanceClient *pc;
108 for (pc = pc_head; pc != NULL; pc = pc->next)
109 if (pc->client == client)
115 * Unregister a client (which may have been a performance client,
116 * but this is not assured).
118 * @param client handle of the (now dead) client
121 GAS_performance_remove_client (struct GNUNET_SERVER_Client *client)
123 struct PerformanceClient *pc;
124 pc = find_client (client);
127 GNUNET_CONTAINER_DLL_remove (pc_head, pc_tail, pc);
128 GNUNET_SERVER_client_drop (client);
133 * Transmit the given performance information to all performance
136 * @param pc performance client to send to
137 * @param peer peer for which this is an address suggestion
138 * @param plugin_name 0-termintated string specifying the transport plugin
139 * @param plugin_addr binary address for the plugin to use
140 * @param plugin_addr_len number of bytes in plugin_addr
141 * @param atsi performance data for the address
142 * @param atsi_count number of performance records in 'ats'
143 * @param bandwidth_out assigned outbound bandwidth
144 * @param bandwidth_in assigned inbound bandwidth
147 GAS_performance_notify_client (struct PerformanceClient *pc,
148 const struct GNUNET_PeerIdentity *peer,
149 const char *plugin_name,
150 const void *plugin_addr, size_t plugin_addr_len,
152 const struct GNUNET_ATS_Information *atsi,
154 struct GNUNET_BANDWIDTH_Value32NBO
156 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in)
159 struct PeerInformationMessage *msg;
160 size_t plugin_name_length = strlen (plugin_name) + 1;
162 sizeof (struct PeerInformationMessage) +
163 atsi_count * sizeof (struct GNUNET_ATS_Information) + plugin_addr_len +
165 char buf[msize] GNUNET_ALIGN;
166 struct GNUNET_ATS_Information *atsp;
169 GNUNET_assert (NULL != pc);
170 if (NULL == find_client (pc->client))
171 return; /* Client disconnected */
173 GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
174 GNUNET_assert (atsi_count <
175 GNUNET_SERVER_MAX_MESSAGE_SIZE /
176 sizeof (struct GNUNET_ATS_Information));
177 msg = (struct PeerInformationMessage *) buf;
178 msg->header.size = htons (msize);
179 msg->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_PEER_INFORMATION);
180 msg->ats_count = htonl (atsi_count);
182 msg->address_length = htons (plugin_addr_len);
183 msg->address_active = ntohl (active);
184 msg->plugin_name_length = htons (plugin_name_length);
185 msg->bandwidth_out = bandwidth_out;
186 msg->bandwidth_in = bandwidth_in;
187 atsp = (struct GNUNET_ATS_Information *) &msg[1];
188 memcpy (atsp, atsi, sizeof (struct GNUNET_ATS_Information) * atsi_count);
189 addrp = (char *) &atsp[atsi_count];
190 memcpy (addrp, plugin_addr, plugin_addr_len);
191 strcpy (&addrp[plugin_addr_len], plugin_name);
192 GNUNET_SERVER_notification_context_unicast (nc, pc->client, &msg->header,
198 * Transmit the given performance information to all performance
201 * @param peer peer for which this is an address suggestion
202 * @param plugin_name 0-termintated string specifying the transport plugin
203 * @param plugin_addr binary address for the plugin to use
204 * @param plugin_addr_len number of bytes in plugin_addr
205 * @param atsi performance data for the address
206 * @param atsi_count number of performance records in 'ats'
207 * @param bandwidth_out assigned outbound bandwidth
208 * @param bandwidth_in assigned inbound bandwidth
211 GAS_performance_notify_all_clients (const struct GNUNET_PeerIdentity *peer,
212 const char *plugin_name,
213 const void *plugin_addr, size_t plugin_addr_len,
215 const struct GNUNET_ATS_Information *atsi,
217 struct GNUNET_BANDWIDTH_Value32NBO
219 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in)
221 struct PerformanceClient *pc;
223 for (pc = pc_head; pc != NULL; pc = pc->next)
224 if (pc->flag == START_FLAG_PERFORMANCE_WITH_PIC)
226 GAS_performance_notify_client (pc,
228 plugin_name, plugin_addr, plugin_addr_len,
231 bandwidth_out, bandwidth_in);
233 GNUNET_STATISTICS_update (GSA_stats,
234 "# performance updates given to clients", 1,
240 peerinfo_it (void *cls,
241 const struct GNUNET_PeerIdentity *id,
242 const char *plugin_name,
243 const void *plugin_addr, size_t plugin_addr_len,
245 const struct GNUNET_ATS_Information *atsi,
247 struct GNUNET_BANDWIDTH_Value32NBO
249 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in)
251 struct PerformanceClient *pc = cls;
252 GNUNET_assert (NULL != pc);
256 if (GNUNET_NO == active)
259 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
260 "Callback for peer `%s' plugin `%s' BW out %llu, BW in %llu \n",
263 ntohl (bandwidth_out.value__),
264 ntohl (bandwidth_in.value__));
265 GAS_performance_notify_client(pc,
267 plugin_name, plugin_addr, plugin_addr_len,
270 bandwidth_out, bandwidth_in);
275 * Iterator for GAS_performance_add_client
277 * @param cls the client requesting information
282 const struct GNUNET_PeerIdentity *id)
284 struct PerformanceClient *pc = cls;
287 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Callback for peer `%s'\n", GNUNET_i2s (id));
288 GAS_addresses_get_peer_info (id, &peerinfo_it, pc);
293 * Register a new performance client.
295 * @param client handle of the new client
296 * @param flag flag specifying the type of the client
299 GAS_performance_add_client (struct GNUNET_SERVER_Client *client,
302 struct PerformanceClient *pc;
303 GNUNET_break (NULL == find_client (client));
305 pc = GNUNET_malloc (sizeof (struct PerformanceClient));
308 GNUNET_SERVER_notification_context_add (nc, client);
309 GNUNET_SERVER_client_keep (client);
310 GNUNET_CONTAINER_DLL_insert (pc_head, pc_tail, pc);
312 /* Send information about clients */
313 GAS_addresses_iterate_peers (&peer_it, pc);
316 static void transmit_req_addr (struct AddressIteration *ai,
317 const struct GNUNET_PeerIdentity *id,
318 const char *plugin_name,
319 const void *plugin_addr, size_t plugin_addr_len,
321 const struct GNUNET_ATS_Information *atsi,
323 struct GNUNET_BANDWIDTH_Value32NBO
325 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in)
329 struct GNUNET_ATS_Information *atsp;
330 struct PeerInformationMessage *msg;
332 size_t plugin_name_length;
335 if (NULL != plugin_name)
336 plugin_name_length = strlen (plugin_name) + 1;
338 plugin_name_length = 0;
339 msize = sizeof (struct PeerInformationMessage) +
340 atsi_count * sizeof (struct GNUNET_ATS_Information) +
341 plugin_addr_len + plugin_name_length;
342 char buf[msize] GNUNET_ALIGN;
344 GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
345 GNUNET_assert (atsi_count <
346 GNUNET_SERVER_MAX_MESSAGE_SIZE /
347 sizeof (struct GNUNET_ATS_Information));
348 msg = (struct PeerInformationMessage *) buf;
349 msg->header.size = htons (msize);
350 msg->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_ADDRESSLIST_RESPONSE);
351 msg->ats_count = htonl (atsi_count);
352 msg->id = htonl (ai->id);
356 memset (&msg->peer, '\0', sizeof (struct GNUNET_PeerIdentity));
357 msg->address_length = htons (plugin_addr_len);
358 msg->address_active = ntohl (active);
359 msg->plugin_name_length = htons (plugin_name_length);
360 msg->bandwidth_out = bandwidth_out;
361 msg->bandwidth_in = bandwidth_in;
362 atsp = (struct GNUNET_ATS_Information *) &msg[1];
363 memcpy (atsp, atsi, sizeof (struct GNUNET_ATS_Information) * atsi_count);
364 addrp = (char *) &atsp[atsi_count];
365 if (NULL != plugin_addr)
366 memcpy (addrp, plugin_addr, plugin_addr_len);
367 if (NULL != plugin_name)
368 strcpy (&addrp[plugin_addr_len], plugin_name);
369 GNUNET_SERVER_notification_context_unicast (nc, ai->pc->client, &msg->header,
374 req_addr_peerinfo_it (void *cls,
375 const struct GNUNET_PeerIdentity *id,
376 const char *plugin_name,
377 const void *plugin_addr, size_t plugin_addr_len,
379 const struct GNUNET_ATS_Information *atsi,
381 struct GNUNET_BANDWIDTH_Value32NBO
383 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in)
385 struct AddressIteration *ai = cls;
387 GNUNET_assert (NULL != ai);
388 GNUNET_assert (NULL != ai->pc);
389 if (NULL == find_client (ai->pc->client))
390 return; /* Client disconnected */
392 if ((NULL == id) && (NULL == id) && (NULL == id))
394 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
395 "Address iteration done\n");
398 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
399 "Callback for %s peer `%s' plugin `%s' BW out %llu, BW in %llu \n",
400 (active == GNUNET_YES) ? "ACTIVE" : "INACTIVE",
403 ntohl (bandwidth_out.value__),
404 ntohl (bandwidth_in.value__));
406 /* Transmit result */
407 if ((GNUNET_YES == ai->all) || (GNUNET_YES == active))
409 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
410 "Sending result for %s peer `%s' plugin `%s' BW out %llu, BW in %llu \n",
411 (active == GNUNET_YES) ? "ACTIVE" : "INACTIVE",
414 ntohl (bandwidth_out.value__),
415 ntohl (bandwidth_in.value__));
416 transmit_req_addr (cls,
419 plugin_addr, plugin_addr_len,
423 bandwidth_out, bandwidth_in);
429 * Iterator for GAS_handle_request_address_list
431 * @param cls the client requesting information
435 req_addr_peer_it (void *cls,
436 const struct GNUNET_PeerIdentity *id)
438 struct AddressIteration *ai = cls;
441 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Callback for peer `%s'\n", GNUNET_i2s (id));
442 GAS_addresses_get_peer_info (id, &req_addr_peerinfo_it, ai);
446 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Peer iteration done\n");
451 * Handle 'address list request' messages from clients.
453 * @param cls unused, NULL
454 * @param client client that sent the request
455 * @param message the request message
458 GAS_handle_request_address_list (void *cls, struct GNUNET_SERVER_Client *client,
459 const struct GNUNET_MessageHeader *message)
461 struct PerformanceClient *pc;
462 struct AddressIteration ai;
463 struct AddressListRequestMessage * alrm = (struct AddressListRequestMessage *) message;
464 struct GNUNET_PeerIdentity allzeros;
465 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_zero;
467 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
468 "ADDRESSLIST_REQUEST");
470 if (NULL == (pc = find_client(client)))
476 ai.all = ntohl (alrm->all);
477 ai.id = ntohl (alrm->id);
480 memset (&allzeros, '\0', sizeof (struct GNUNET_PeerIdentity));
481 bandwidth_zero.value__ = htonl (0);
482 if (0 == memcmp (&alrm->peer, &allzeros, sizeof (struct GNUNET_PeerIdentity)))
484 /* Return addresses for all peers */
485 GAS_addresses_iterate_peers (&req_addr_peer_it, &ai);
486 transmit_req_addr (&ai, NULL, NULL, NULL, 0, GNUNET_NO, NULL, 0, bandwidth_zero, bandwidth_zero);
490 /* Return addresses for a specific peer */
491 GAS_addresses_get_peer_info (&alrm->peer, &req_addr_peerinfo_it, &ai);
492 transmit_req_addr (&ai, NULL, NULL, NULL, 0, GNUNET_NO, NULL, 0, bandwidth_zero, bandwidth_zero);
499 * Handle 'reservation request' messages from clients.
501 * @param cls unused, NULL
502 * @param client client that sent the request
503 * @param message the request message
506 GAS_handle_reservation_request (void *cls, struct GNUNET_SERVER_Client *client,
507 const struct GNUNET_MessageHeader *message)
509 const struct ReservationRequestMessage *msg =
510 (const struct ReservationRequestMessage *) message;
511 struct ReservationResultMessage result;
513 struct GNUNET_TIME_Relative res_delay;
515 if (NULL == find_client (client))
517 /* missing start message! */
519 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
522 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
523 "RESERVATION_REQUEST");
524 amount = (int32_t) ntohl (msg->amount);
525 res_delay = GAS_reservations_reserve (&msg->peer, amount);
526 if (res_delay.rel_value > 0)
528 result.header.size = htons (sizeof (struct ReservationResultMessage));
529 result.header.type = htons (GNUNET_MESSAGE_TYPE_ATS_RESERVATION_RESULT);
530 result.amount = htonl (amount);
531 result.peer = msg->peer;
532 result.res_delay = GNUNET_TIME_relative_hton (res_delay);
533 GNUNET_STATISTICS_update (GSA_stats, "# reservation requests processed", 1,
535 GNUNET_SERVER_notification_context_unicast (nc, client, &result.header,
537 GNUNET_SERVER_receive_done (client, GNUNET_OK);
542 * Handle 'preference change' messages from clients.
544 * @param cls unused, NULL
545 * @param client client that sent the request
546 * @param message the request message
549 GAS_handle_preference_change (void *cls, struct GNUNET_SERVER_Client *client,
550 const struct GNUNET_MessageHeader *message)
552 const struct ChangePreferenceMessage *msg;
553 const struct PreferenceInformation *pi;
558 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
559 "PREFERENCE_CHANGE");
560 msize = ntohs (message->size);
561 if (msize < sizeof (struct ChangePreferenceMessage))
564 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
567 msg = (const struct ChangePreferenceMessage *) message;
568 nump = ntohl (msg->num_preferences);
570 sizeof (struct ChangePreferenceMessage) +
571 nump * sizeof (struct PreferenceInformation))
574 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
577 GNUNET_STATISTICS_update (GSA_stats, "# preference change requests processed",
579 pi = (const struct PreferenceInformation *) &msg[1];
580 for (i = 0; i < nump; i++)
581 GAS_addresses_change_preference (&msg->peer,
582 (enum GNUNET_ATS_PreferenceKind)
583 ntohl (pi[i].preference_kind),
584 pi[i].preference_value);
585 GNUNET_SERVER_receive_done (client, GNUNET_OK);
590 * Initialize performance subsystem.
592 * @param server handle to our server
595 GAS_performance_init (struct GNUNET_SERVER_Handle *server)
597 nc = GNUNET_SERVER_notification_context_create (server, 128);
602 * Shutdown performance subsystem.
605 GAS_performance_done ()
607 GNUNET_SERVER_notification_context_destroy (nc);
611 /* end of gnunet-service-ats_performance.c */