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_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 * Head of linked list of all clients to this service.
66 static struct PerformanceClient *pc_head;
69 * Tail of linked list of all clients to this service.
71 static struct PerformanceClient *pc_tail;
74 * Context for sending messages to performance clients.
76 static struct GNUNET_SERVER_NotificationContext *nc;
80 * Find the performance client associated with the given handle.
82 * @param client server handle
83 * @return internal handle
85 static struct PerformanceClient *
86 find_client (struct GNUNET_SERVER_Client *client)
88 struct PerformanceClient *pc;
90 for (pc = pc_head; pc != NULL; pc = pc->next)
91 if (pc->client == client)
97 * Unregister a client (which may have been a performance client,
98 * but this is not assured).
100 * @param client handle of the (now dead) client
103 GAS_performance_remove_client (struct GNUNET_SERVER_Client *client)
105 struct PerformanceClient *pc;
106 pc = find_client (client);
109 GNUNET_CONTAINER_DLL_remove (pc_head, pc_tail, pc);
110 GNUNET_SERVER_client_drop (client);
115 * Transmit the given performance information to all performance
118 * @param pc performance client to send to
119 * @param peer peer for which this is an address suggestion
120 * @param plugin_name 0-termintated string specifying the transport plugin
121 * @param plugin_addr binary address for the plugin to use
122 * @param plugin_addr_len number of bytes in plugin_addr
123 * @param atsi performance data for the address
124 * @param atsi_count number of performance records in 'ats'
125 * @param bandwidth_out assigned outbound bandwidth
126 * @param bandwidth_in assigned inbound bandwidth
129 GAS_performance_notify_client (struct PerformanceClient *pc,
130 const struct GNUNET_PeerIdentity *peer,
131 const char *plugin_name,
132 const void *plugin_addr, size_t plugin_addr_len,
133 const struct GNUNET_ATS_Information *atsi,
135 struct GNUNET_BANDWIDTH_Value32NBO
137 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in)
140 struct PeerInformationMessage *msg;
141 size_t plugin_name_length = strlen (plugin_name) + 1;
143 sizeof (struct PeerInformationMessage) +
144 atsi_count * sizeof (struct GNUNET_ATS_Information) + plugin_addr_len +
146 char buf[msize] GNUNET_ALIGN;
147 struct GNUNET_ATS_Information *atsp;
150 GNUNET_assert (NULL != pc);
151 if (NULL == find_client (pc->client))
152 return; /* Client disconnected */
154 GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
155 GNUNET_assert (atsi_count <
156 GNUNET_SERVER_MAX_MESSAGE_SIZE /
157 sizeof (struct GNUNET_ATS_Information));
158 msg = (struct PeerInformationMessage *) buf;
159 msg->header.size = htons (msize);
160 msg->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_PEER_INFORMATION);
161 msg->ats_count = htonl (atsi_count);
163 msg->address_length = htons (plugin_addr_len);
164 msg->plugin_name_length = htons (plugin_name_length);
165 msg->bandwidth_out = bandwidth_out;
166 msg->bandwidth_in = bandwidth_in;
167 atsp = (struct GNUNET_ATS_Information *) &msg[1];
168 memcpy (atsp, atsi, sizeof (struct GNUNET_ATS_Information) * atsi_count);
169 addrp = (char *) &atsp[atsi_count];
170 memcpy (addrp, plugin_addr, plugin_addr_len);
171 strcpy (&addrp[plugin_addr_len], plugin_name);
172 GNUNET_SERVER_notification_context_unicast (nc, pc->client, &msg->header,
178 * Transmit the given performance information to all performance
181 * @param peer peer for which this is an address suggestion
182 * @param plugin_name 0-termintated string specifying the transport plugin
183 * @param plugin_addr binary address for the plugin to use
184 * @param plugin_addr_len number of bytes in plugin_addr
185 * @param atsi performance data for the address
186 * @param atsi_count number of performance records in 'ats'
187 * @param bandwidth_out assigned outbound bandwidth
188 * @param bandwidth_in assigned inbound bandwidth
191 GAS_performance_notify_all_clients (const struct GNUNET_PeerIdentity *peer,
192 const char *plugin_name,
193 const void *plugin_addr, size_t plugin_addr_len,
194 const struct GNUNET_ATS_Information *atsi,
196 struct GNUNET_BANDWIDTH_Value32NBO
198 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in)
200 struct PerformanceClient *pc;
202 for (pc = pc_head; pc != NULL; pc = pc->next)
203 if (pc->flag == START_FLAG_PERFORMANCE_WITH_PIC)
205 GAS_performance_notify_client (pc,
207 plugin_name, plugin_addr, plugin_addr_len,
209 bandwidth_out, bandwidth_in);
212 GNUNET_STATISTICS_update (GSA_stats,
213 "# performance updates given to clients", 1,
218 peerinfo_it (void *cls,
219 const struct GNUNET_PeerIdentity *id,
220 const char *plugin_name,
221 const void *plugin_addr, size_t plugin_addr_len,
222 const struct GNUNET_ATS_Information *atsi,
224 struct GNUNET_BANDWIDTH_Value32NBO
226 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in)
228 GNUNET_assert (NULL != cls);
231 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Callback for peer `%s' plugin `%s' BW out %llu, BW in %llu \n",
233 plugin_name, ntohl (bandwidth_out.value__), ntohl (bandwidth_in.value__));
234 GAS_performance_notify_client(cls,
236 plugin_name, plugin_addr, plugin_addr_len,
238 bandwidth_out, bandwidth_in);
245 const struct GNUNET_PeerIdentity *id)
249 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Callback for peer `%s'\n", GNUNET_i2s (id));
250 GAS_addresses_get_peer_info (id, &peerinfo_it, cls);
255 * Register a new performance client.
257 * @param client handle of the new client
258 * @param flag flag specifying the type of the client
261 GAS_performance_add_client (struct GNUNET_SERVER_Client *client,
264 struct PerformanceClient *pc;
266 GNUNET_break (NULL == find_client (client));
267 pc = GNUNET_malloc (sizeof (struct PerformanceClient));
270 GNUNET_SERVER_notification_context_add (nc, client);
271 GNUNET_SERVER_client_keep (client);
272 GNUNET_CONTAINER_DLL_insert (pc_head, pc_tail, pc);
274 /* Send information about clients */
275 GAS_addresses_iterate_peers (&peer_it, pc);
281 * Handle 'reservation request' messages from clients.
283 * @param cls unused, NULL
284 * @param client client that sent the request
285 * @param message the request message
288 GAS_handle_reservation_request (void *cls, struct GNUNET_SERVER_Client *client,
289 const struct GNUNET_MessageHeader *message)
291 const struct ReservationRequestMessage *msg =
292 (const struct ReservationRequestMessage *) message;
293 struct ReservationResultMessage result;
295 struct GNUNET_TIME_Relative res_delay;
297 if (NULL == find_client (client))
299 /* missing start message! */
301 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
304 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
305 "RESERVATION_REQUEST");
306 amount = (int32_t) ntohl (msg->amount);
307 res_delay = GAS_reservations_reserve (&msg->peer, amount);
308 if (res_delay.rel_value > 0)
310 result.header.size = htons (sizeof (struct ReservationResultMessage));
311 result.header.type = htons (GNUNET_MESSAGE_TYPE_ATS_RESERVATION_RESULT);
312 result.amount = htonl (amount);
313 result.peer = msg->peer;
314 result.res_delay = GNUNET_TIME_relative_hton (res_delay);
315 GNUNET_STATISTICS_update (GSA_stats, "# reservation requests processed", 1,
317 GNUNET_SERVER_notification_context_unicast (nc, client, &result.header,
319 GNUNET_SERVER_receive_done (client, GNUNET_OK);
324 * Handle 'preference change' messages from clients.
326 * @param cls unused, NULL
327 * @param client client that sent the request
328 * @param message the request message
331 GAS_handle_preference_change (void *cls, struct GNUNET_SERVER_Client *client,
332 const struct GNUNET_MessageHeader *message)
334 const struct ChangePreferenceMessage *msg;
335 const struct PreferenceInformation *pi;
340 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
341 "PREFERENCE_CHANGE");
342 msize = ntohs (message->size);
343 if (msize < sizeof (struct ChangePreferenceMessage))
346 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
349 msg = (const struct ChangePreferenceMessage *) message;
350 nump = ntohl (msg->num_preferences);
352 sizeof (struct ChangePreferenceMessage) +
353 nump * sizeof (struct PreferenceInformation))
356 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
359 GNUNET_STATISTICS_update (GSA_stats, "# preference change requests processed",
361 pi = (const struct PreferenceInformation *) &msg[1];
362 for (i = 0; i < nump; i++)
363 GAS_addresses_change_preference (&msg->peer,
364 (enum GNUNET_ATS_PreferenceKind)
365 ntohl (pi[i].preference_kind),
366 pi[i].preference_value);
367 GNUNET_SERVER_receive_done (client, GNUNET_OK);
372 * Initialize performance subsystem.
374 * @param server handle to our server
377 GAS_performance_init (struct GNUNET_SERVER_Handle *server)
379 nc = GNUNET_SERVER_notification_context_create (server, 128);
384 * Shutdown performance subsystem.
387 GAS_performance_done ()
389 GNUNET_SERVER_notification_context_destroy (nc);
393 /* end of gnunet-service-ats_performance.c */