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
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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;
75 unsigned int msg_type;
80 * Head of linked list of all clients to this service.
82 static struct PerformanceClient *pc_head;
85 * Tail of linked list of all clients to this service.
87 static struct PerformanceClient *pc_tail;
90 * Context for sending messages to performance clients.
92 static struct GNUNET_SERVER_NotificationContext *nc;
96 * Find the performance client associated with the given handle.
98 * @param client server handle
99 * @return internal handle
101 static struct PerformanceClient *
102 find_client (struct GNUNET_SERVER_Client *client)
104 struct PerformanceClient *pc;
106 for (pc = pc_head; pc != NULL; pc = pc->next)
107 if (pc->client == client)
113 * Unregister a client (which may have been a performance client,
114 * but this is not assured).
116 * @param client handle of the (now dead) client
119 GAS_performance_remove_client (struct GNUNET_SERVER_Client *client)
121 struct PerformanceClient *pc;
122 pc = find_client (client);
125 GNUNET_CONTAINER_DLL_remove (pc_head, pc_tail, pc);
126 GNUNET_SERVER_client_drop (client);
131 * Transmit the given performance information to all performance
134 * @param pc performance client to send to
135 * @param peer peer for which this is an address suggestion
136 * @param plugin_name 0-termintated string specifying the transport plugin
137 * @param plugin_addr binary address for the plugin to use
138 * @param plugin_addr_len number of bytes in plugin_addr
139 * @param atsi performance data for the address
140 * @param atsi_count number of performance records in 'ats'
141 * @param bandwidth_out assigned outbound bandwidth
142 * @param bandwidth_in assigned inbound bandwidth
145 GAS_performance_notify_client (struct PerformanceClient *pc,
146 const struct GNUNET_PeerIdentity *peer,
147 const char *plugin_name,
148 const void *plugin_addr, size_t plugin_addr_len,
150 const struct GNUNET_ATS_Information *atsi,
152 struct GNUNET_BANDWIDTH_Value32NBO
154 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in)
157 struct PeerInformationMessage *msg;
158 size_t plugin_name_length = strlen (plugin_name) + 1;
160 sizeof (struct PeerInformationMessage) +
161 atsi_count * sizeof (struct GNUNET_ATS_Information) + plugin_addr_len +
163 char buf[msize] GNUNET_ALIGN;
164 struct GNUNET_ATS_Information *atsp;
167 GNUNET_assert (NULL != pc);
168 if (NULL == find_client (pc->client))
169 return; /* Client disconnected */
171 GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
172 GNUNET_assert (atsi_count <
173 GNUNET_SERVER_MAX_MESSAGE_SIZE /
174 sizeof (struct GNUNET_ATS_Information));
175 msg = (struct PeerInformationMessage *) buf;
176 msg->header.size = htons (msize);
177 msg->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_PEER_INFORMATION);
178 msg->ats_count = htonl (atsi_count);
180 msg->address_length = htons (plugin_addr_len);
181 msg->address_active = ntohl (active);
182 msg->plugin_name_length = htons (plugin_name_length);
183 msg->bandwidth_out = bandwidth_out;
184 msg->bandwidth_in = bandwidth_in;
185 atsp = (struct GNUNET_ATS_Information *) &msg[1];
186 memcpy (atsp, atsi, sizeof (struct GNUNET_ATS_Information) * atsi_count);
187 addrp = (char *) &atsp[atsi_count];
188 memcpy (addrp, plugin_addr, plugin_addr_len);
189 strcpy (&addrp[plugin_addr_len], plugin_name);
190 GNUNET_SERVER_notification_context_unicast (nc, pc->client, &msg->header,
196 * Transmit the given performance information to all performance
199 * @param peer peer for which this is an address suggestion
200 * @param plugin_name 0-termintated string specifying the transport plugin
201 * @param plugin_addr binary address for the plugin to use
202 * @param plugin_addr_len number of bytes in plugin_addr
203 * @param atsi performance data for the address
204 * @param atsi_count number of performance records in 'ats'
205 * @param bandwidth_out assigned outbound bandwidth
206 * @param bandwidth_in assigned inbound bandwidth
209 GAS_performance_notify_all_clients (const struct GNUNET_PeerIdentity *peer,
210 const char *plugin_name,
211 const void *plugin_addr, size_t plugin_addr_len,
213 const struct GNUNET_ATS_Information *atsi,
215 struct GNUNET_BANDWIDTH_Value32NBO
217 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in)
219 struct PerformanceClient *pc;
221 for (pc = pc_head; pc != NULL; pc = pc->next)
222 if (pc->flag == START_FLAG_PERFORMANCE_WITH_PIC)
224 GAS_performance_notify_client (pc,
226 plugin_name, plugin_addr, plugin_addr_len,
229 bandwidth_out, bandwidth_in);
231 GNUNET_STATISTICS_update (GSA_stats,
232 "# performance updates given to clients", 1,
238 peerinfo_it (void *cls,
239 const struct GNUNET_PeerIdentity *id,
240 const char *plugin_name,
241 const void *plugin_addr, size_t plugin_addr_len,
243 const struct GNUNET_ATS_Information *atsi,
245 struct GNUNET_BANDWIDTH_Value32NBO
247 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in)
249 struct PerformanceClient *pc = cls;
250 GNUNET_assert (NULL != pc);
254 if (GNUNET_NO == active)
257 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
258 "Callback for peer `%s' plugin `%s' BW out %llu, BW in %llu \n",
261 ntohl (bandwidth_out.value__),
262 ntohl (bandwidth_in.value__));
263 GAS_performance_notify_client(pc,
265 plugin_name, plugin_addr, plugin_addr_len,
268 bandwidth_out, bandwidth_in);
273 * Iterator for GAS_performance_add_client
275 * @param cls the client requesting information
280 const struct GNUNET_PeerIdentity *id)
282 struct PerformanceClient *pc = cls;
285 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Callback for peer `%s'\n", GNUNET_i2s (id));
286 GAS_addresses_get_peer_info (id, &peerinfo_it, pc);
291 * Register a new performance client.
293 * @param client handle of the new client
294 * @param flag flag specifying the type of the client
297 GAS_performance_add_client (struct GNUNET_SERVER_Client *client,
300 struct PerformanceClient *pc;
301 GNUNET_break (NULL == find_client (client));
303 pc = GNUNET_malloc (sizeof (struct PerformanceClient));
306 GNUNET_SERVER_notification_context_add (nc, client);
307 GNUNET_SERVER_client_keep (client);
308 GNUNET_CONTAINER_DLL_insert (pc_head, pc_tail, pc);
310 /* Send information about clients */
311 GAS_addresses_iterate_peers (&peer_it, pc);
317 req_addr_peerinfo_it (void *cls,
318 const struct GNUNET_PeerIdentity *id,
319 const char *plugin_name,
320 const void *plugin_addr, size_t plugin_addr_len,
322 const struct GNUNET_ATS_Information *atsi,
324 struct GNUNET_BANDWIDTH_Value32NBO
326 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in)
328 struct AddressIteration *ai = cls;
329 struct PeerInformationMessage *msg;
330 size_t plugin_name_length;
332 struct GNUNET_ATS_Information *atsp;
336 GNUNET_assert (NULL != ai);
337 GNUNET_assert (NULL != ai->pc);
338 if (NULL == find_client (ai->pc->client))
339 return; /* Client disconnected */
341 if ((NULL == id) && (NULL == id) && (NULL == id))
343 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
344 "Address iteration done\n");
347 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
348 "Callback for peer `%s' plugin `%s' BW out %llu, BW in %llu \n",
351 ntohl (bandwidth_out.value__),
352 ntohl (bandwidth_in.value__));
354 /* Transmit result */
356 plugin_name_length = strlen (plugin_name) + 1;
357 msize = sizeof (struct PeerInformationMessage) +
358 atsi_count * sizeof (struct GNUNET_ATS_Information) +
359 plugin_addr_len + plugin_name_length;
360 char buf[msize] GNUNET_ALIGN;
362 GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
363 GNUNET_assert (atsi_count <
364 GNUNET_SERVER_MAX_MESSAGE_SIZE /
365 sizeof (struct GNUNET_ATS_Information));
366 msg = (struct PeerInformationMessage *) buf;
367 msg->header.size = htons (msize);
368 msg->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_ADDRESSLIST_RESPONSE);
369 msg->ats_count = htonl (atsi_count);
371 msg->address_length = htons (plugin_addr_len);
372 msg->address_active = ntohl (active);
373 msg->plugin_name_length = htons (plugin_name_length);
374 msg->bandwidth_out = bandwidth_out;
375 msg->bandwidth_in = bandwidth_in;
376 atsp = (struct GNUNET_ATS_Information *) &msg[1];
377 memcpy (atsp, atsi, sizeof (struct GNUNET_ATS_Information) * atsi_count);
378 addrp = (char *) &atsp[atsi_count];
379 memcpy (addrp, plugin_addr, plugin_addr_len);
380 strcpy (&addrp[plugin_addr_len], plugin_name);
381 GNUNET_SERVER_notification_context_unicast (nc, ai->pc->client, &msg->header,
387 * Iterator for GAS_handle_request_address_list
389 * @param cls the client requesting information
393 req_addr_peer_it (void *cls,
394 const struct GNUNET_PeerIdentity *id)
396 struct AddressIteration *ai = cls;
399 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Callback for peer `%s'\n", GNUNET_i2s (id));
400 GAS_addresses_get_peer_info (id, &req_addr_peerinfo_it, ai);
404 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Peer iteration done\n");
409 * Handle 'address list request' messages from clients.
411 * @param cls unused, NULL
412 * @param client client that sent the request
413 * @param message the request message
416 GAS_handle_request_address_list (void *cls, struct GNUNET_SERVER_Client *client,
417 const struct GNUNET_MessageHeader *message)
419 struct PerformanceClient *pc;
420 struct AddressIteration ai;
421 struct AddressListRequestMessage * alrm = (struct AddressListRequestMessage *) message;
422 struct GNUNET_PeerIdentity allzeros;
424 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
425 "ADDRESSLIST_REQUEST");
427 if (NULL == (pc = find_client(client)))
433 ai.all = ntohl (alrm->all);
436 memset (&allzeros, '\0', sizeof (struct GNUNET_PeerIdentity));
437 if (0 == memcmp (&alrm->peer, &allzeros, sizeof (struct GNUNET_PeerIdentity)))
439 /* Return addresses for all peers */
440 GAS_addresses_iterate_peers (&req_addr_peer_it, &ai);
444 /* Return addresses for a specific peer */
445 GAS_addresses_get_peer_info (&alrm->peer, &req_addr_peerinfo_it, &ai);
452 * Handle 'reservation request' messages from clients.
454 * @param cls unused, NULL
455 * @param client client that sent the request
456 * @param message the request message
459 GAS_handle_reservation_request (void *cls, struct GNUNET_SERVER_Client *client,
460 const struct GNUNET_MessageHeader *message)
462 const struct ReservationRequestMessage *msg =
463 (const struct ReservationRequestMessage *) message;
464 struct ReservationResultMessage result;
466 struct GNUNET_TIME_Relative res_delay;
468 if (NULL == find_client (client))
470 /* missing start message! */
472 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
475 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
476 "RESERVATION_REQUEST");
477 amount = (int32_t) ntohl (msg->amount);
478 res_delay = GAS_reservations_reserve (&msg->peer, amount);
479 if (res_delay.rel_value > 0)
481 result.header.size = htons (sizeof (struct ReservationResultMessage));
482 result.header.type = htons (GNUNET_MESSAGE_TYPE_ATS_RESERVATION_RESULT);
483 result.amount = htonl (amount);
484 result.peer = msg->peer;
485 result.res_delay = GNUNET_TIME_relative_hton (res_delay);
486 GNUNET_STATISTICS_update (GSA_stats, "# reservation requests processed", 1,
488 GNUNET_SERVER_notification_context_unicast (nc, client, &result.header,
490 GNUNET_SERVER_receive_done (client, GNUNET_OK);
495 * Handle 'preference change' messages from clients.
497 * @param cls unused, NULL
498 * @param client client that sent the request
499 * @param message the request message
502 GAS_handle_preference_change (void *cls, struct GNUNET_SERVER_Client *client,
503 const struct GNUNET_MessageHeader *message)
505 const struct ChangePreferenceMessage *msg;
506 const struct PreferenceInformation *pi;
511 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
512 "PREFERENCE_CHANGE");
513 msize = ntohs (message->size);
514 if (msize < sizeof (struct ChangePreferenceMessage))
517 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
520 msg = (const struct ChangePreferenceMessage *) message;
521 nump = ntohl (msg->num_preferences);
523 sizeof (struct ChangePreferenceMessage) +
524 nump * sizeof (struct PreferenceInformation))
527 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
530 GNUNET_STATISTICS_update (GSA_stats, "# preference change requests processed",
532 pi = (const struct PreferenceInformation *) &msg[1];
533 for (i = 0; i < nump; i++)
534 GAS_addresses_change_preference (&msg->peer,
535 (enum GNUNET_ATS_PreferenceKind)
536 ntohl (pi[i].preference_kind),
537 pi[i].preference_value);
538 GNUNET_SERVER_receive_done (client, GNUNET_OK);
543 * Initialize performance subsystem.
545 * @param server handle to our server
548 GAS_performance_init (struct GNUNET_SERVER_Handle *server)
550 nc = GNUNET_SERVER_notification_context_create (server, 128);
555 * Shutdown performance subsystem.
558 GAS_performance_done ()
560 GNUNET_SERVER_notification_context_destroy (nc);
564 /* end of gnunet-service-ats_performance.c */