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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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 * 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 peerinfo_it (void *cls,
98 const struct GNUNET_PeerIdentity *id,
99 const char *plugin_name,
100 const void *plugin_addr, size_t plugin_addr_len,
101 const struct GNUNET_ATS_Information *atsi,
103 struct GNUNET_BANDWIDTH_Value32NBO
105 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in)
107 struct PerformanceClient *pc = cls;
108 GNUNET_assert (NULL != pc);
111 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Callback for peer `%s' plugin `%s' BW out %llu, BW in %llu \n",
113 plugin_name, ntohl (bandwidth_out.value__), ntohl (bandwidth_in.value__));
114 /* TODO: Notify client here! */
121 const struct GNUNET_PeerIdentity *id)
125 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Callback for peer `%s'\n", GNUNET_i2s (id));
126 GAS_addresses_get_peer_info (id, &peerinfo_it, cls);
131 * Register a new performance client.
133 * @param client handle of the new client
134 * @param flag flag specifying the type of the client
137 GAS_performance_add_client (struct GNUNET_SERVER_Client *client,
140 struct PerformanceClient *pc;
142 GNUNET_break (NULL == find_client (client));
143 pc = GNUNET_malloc (sizeof (struct PerformanceClient));
146 GNUNET_SERVER_notification_context_add (nc, client);
147 GNUNET_SERVER_client_keep (client);
148 GNUNET_CONTAINER_DLL_insert (pc_head, pc_tail, pc);
150 /* Send information about clients */
151 GAS_addresses_iterate_peers (&peer_it, pc);
156 * Unregister a client (which may have been a performance client,
157 * but this is not assured).
159 * @param client handle of the (now dead) client
162 GAS_performance_remove_client (struct GNUNET_SERVER_Client *client)
164 struct PerformanceClient *pc;
166 pc = find_client (client);
169 GNUNET_CONTAINER_DLL_remove (pc_head, pc_tail, pc);
170 GNUNET_SERVER_client_drop (client);
176 * Transmit the given performance information to all performance
179 * @param peer peer for which this is an address suggestion
180 * @param plugin_name 0-termintated string specifying the transport plugin
181 * @param plugin_addr binary address for the plugin to use
182 * @param plugin_addr_len number of bytes in plugin_addr
183 * @param atsi performance data for the address
184 * @param atsi_count number of performance records in 'ats'
185 * @param bandwidth_out assigned outbound bandwidth
186 * @param bandwidth_in assigned inbound bandwidth
189 GAS_performance_notify_clients (const struct GNUNET_PeerIdentity *peer,
190 const char *plugin_name,
191 const void *plugin_addr, size_t plugin_addr_len,
192 const struct GNUNET_ATS_Information *atsi,
194 struct GNUNET_BANDWIDTH_Value32NBO
196 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in)
198 struct PerformanceClient *pc;
199 struct PeerInformationMessage *msg;
200 size_t plugin_name_length = strlen (plugin_name) + 1;
202 sizeof (struct PeerInformationMessage) +
203 atsi_count * sizeof (struct GNUNET_ATS_Information) + plugin_addr_len +
205 char buf[msize] GNUNET_ALIGN;
206 struct GNUNET_ATS_Information *atsp;
209 GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
210 GNUNET_assert (atsi_count <
211 GNUNET_SERVER_MAX_MESSAGE_SIZE /
212 sizeof (struct GNUNET_ATS_Information));
213 msg = (struct PeerInformationMessage *) buf;
214 msg->header.size = htons (msize);
215 msg->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_PEER_INFORMATION);
216 msg->ats_count = htonl (atsi_count);
218 msg->address_length = htons (plugin_addr_len);
219 msg->plugin_name_length = htons (plugin_name_length);
220 msg->bandwidth_out = bandwidth_out;
221 msg->bandwidth_in = bandwidth_in;
222 atsp = (struct GNUNET_ATS_Information *) &msg[1];
223 memcpy (atsp, atsi, sizeof (struct GNUNET_ATS_Information) * atsi_count);
224 addrp = (char *) &atsp[atsi_count];
225 memcpy (addrp, plugin_addr, plugin_addr_len);
226 strcpy (&addrp[plugin_addr_len], plugin_name);
227 for (pc = pc_head; pc != NULL; pc = pc->next)
228 if (pc->flag == START_FLAG_PERFORMANCE_WITH_PIC)
230 GNUNET_SERVER_notification_context_unicast (nc, pc->client, &msg->header,
232 GNUNET_STATISTICS_update (GSA_stats,
233 "# performance updates given to clients", 1,
240 * Handle 'reservation request' messages from clients.
242 * @param cls unused, NULL
243 * @param client client that sent the request
244 * @param message the request message
247 GAS_handle_reservation_request (void *cls, struct GNUNET_SERVER_Client *client,
248 const struct GNUNET_MessageHeader *message)
250 const struct ReservationRequestMessage *msg =
251 (const struct ReservationRequestMessage *) message;
252 struct ReservationResultMessage result;
254 struct GNUNET_TIME_Relative res_delay;
256 if (NULL == find_client (client))
258 /* missing start message! */
260 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
263 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
264 "RESERVATION_REQUEST");
265 amount = (int32_t) ntohl (msg->amount);
266 res_delay = GAS_reservations_reserve (&msg->peer, amount);
267 if (res_delay.rel_value > 0)
269 result.header.size = htons (sizeof (struct ReservationResultMessage));
270 result.header.type = htons (GNUNET_MESSAGE_TYPE_ATS_RESERVATION_RESULT);
271 result.amount = htonl (amount);
272 result.peer = msg->peer;
273 result.res_delay = GNUNET_TIME_relative_hton (res_delay);
274 GNUNET_STATISTICS_update (GSA_stats, "# reservation requests processed", 1,
276 GNUNET_SERVER_notification_context_unicast (nc, client, &result.header,
278 GNUNET_SERVER_receive_done (client, GNUNET_OK);
283 * Handle 'preference change' messages from clients.
285 * @param cls unused, NULL
286 * @param client client that sent the request
287 * @param message the request message
290 GAS_handle_preference_change (void *cls, struct GNUNET_SERVER_Client *client,
291 const struct GNUNET_MessageHeader *message)
293 const struct ChangePreferenceMessage *msg;
294 const struct PreferenceInformation *pi;
299 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
300 "PREFERENCE_CHANGE");
301 msize = ntohs (message->size);
302 if (msize < sizeof (struct ChangePreferenceMessage))
305 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
308 msg = (const struct ChangePreferenceMessage *) message;
309 nump = ntohl (msg->num_preferences);
311 sizeof (struct ChangePreferenceMessage) +
312 nump * sizeof (struct PreferenceInformation))
315 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
318 GNUNET_STATISTICS_update (GSA_stats, "# preference change requests processed",
320 pi = (const struct PreferenceInformation *) &msg[1];
321 for (i = 0; i < nump; i++)
322 GAS_addresses_change_preference (&msg->peer,
323 (enum GNUNET_ATS_PreferenceKind)
324 ntohl (pi[i].preference_kind),
325 pi[i].preference_value);
326 GNUNET_SERVER_receive_done (client, GNUNET_OK);
331 * Initialize performance subsystem.
333 * @param server handle to our server
336 GAS_performance_init (struct GNUNET_SERVER_Handle *server)
338 nc = GNUNET_SERVER_notification_context_create (server, 128);
343 * Shutdown performance subsystem.
346 GAS_performance_done ()
348 GNUNET_SERVER_notification_context_destroy (nc);
352 /* end of gnunet-service-ats_performance.c */