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 * 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)
98 peerinfo_it (void *cls,
99 const struct GNUNET_PeerIdentity *id,
102 struct PerformanceClient *pc = cls;
103 GNUNET_assert (NULL != pc);
106 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Callback for peer `%s' plugin `%s'\n", GNUNET_i2s (id), plugin);
107 /* TODO: Notify client here! */
115 const struct GNUNET_PeerIdentity *id)
119 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Callback for peer `%s'\n", GNUNET_i2s (id));
120 GAS_addresses_get_peer_info (id, &peerinfo_it, cls);
125 * Register a new performance client.
127 * @param client handle of the new client
128 * @param flag flag specifying the type of the client
131 GAS_performance_add_client (struct GNUNET_SERVER_Client *client,
134 struct PerformanceClient *pc;
136 GNUNET_break (NULL == find_client (client));
137 pc = GNUNET_malloc (sizeof (struct PerformanceClient));
140 GNUNET_SERVER_notification_context_add (nc, client);
141 GNUNET_SERVER_client_keep (client);
142 GNUNET_CONTAINER_DLL_insert (pc_head, pc_tail, pc);
144 /* Send information about clients */
145 GAS_addresses_iterate_peers (&peer_it, pc);
150 * Unregister a client (which may have been a performance client,
151 * but this is not assured).
153 * @param client handle of the (now dead) client
156 GAS_performance_remove_client (struct GNUNET_SERVER_Client *client)
158 struct PerformanceClient *pc;
160 pc = find_client (client);
163 GNUNET_CONTAINER_DLL_remove (pc_head, pc_tail, pc);
164 GNUNET_SERVER_client_drop (client);
170 * Transmit the given performance information to all performance
173 * @param peer peer for which this is an address suggestion
174 * @param plugin_name 0-termintated string specifying the transport plugin
175 * @param plugin_addr binary address for the plugin to use
176 * @param plugin_addr_len number of bytes in plugin_addr
177 * @param atsi performance data for the address
178 * @param atsi_count number of performance records in 'ats'
179 * @param bandwidth_out assigned outbound bandwidth
180 * @param bandwidth_in assigned inbound bandwidth
183 GAS_performance_notify_clients (const struct GNUNET_PeerIdentity *peer,
184 const char *plugin_name,
185 const void *plugin_addr, size_t plugin_addr_len,
186 const struct GNUNET_ATS_Information *atsi,
188 struct GNUNET_BANDWIDTH_Value32NBO
190 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in)
192 struct PerformanceClient *pc;
193 struct PeerInformationMessage *msg;
194 size_t plugin_name_length = strlen (plugin_name) + 1;
196 sizeof (struct PeerInformationMessage) +
197 atsi_count * sizeof (struct GNUNET_ATS_Information) + plugin_addr_len +
199 char buf[msize] GNUNET_ALIGN;
200 struct GNUNET_ATS_Information *atsp;
203 GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
204 GNUNET_assert (atsi_count <
205 GNUNET_SERVER_MAX_MESSAGE_SIZE /
206 sizeof (struct GNUNET_ATS_Information));
207 msg = (struct PeerInformationMessage *) buf;
208 msg->header.size = htons (msize);
209 msg->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_PEER_INFORMATION);
210 msg->ats_count = htonl (atsi_count);
212 msg->address_length = htons (plugin_addr_len);
213 msg->plugin_name_length = htons (plugin_name_length);
214 msg->bandwidth_out = bandwidth_out;
215 msg->bandwidth_in = bandwidth_in;
216 atsp = (struct GNUNET_ATS_Information *) &msg[1];
217 memcpy (atsp, atsi, sizeof (struct GNUNET_ATS_Information) * atsi_count);
218 addrp = (char *) &atsp[atsi_count];
219 memcpy (addrp, plugin_addr, plugin_addr_len);
220 strcpy (&addrp[plugin_addr_len], plugin_name);
221 for (pc = pc_head; pc != NULL; pc = pc->next)
222 if (pc->flag == START_FLAG_PERFORMANCE_WITH_PIC)
224 GNUNET_SERVER_notification_context_unicast (nc, pc->client, &msg->header,
226 GNUNET_STATISTICS_update (GSA_stats,
227 "# performance updates given to clients", 1,
234 * Handle 'reservation request' messages from clients.
236 * @param cls unused, NULL
237 * @param client client that sent the request
238 * @param message the request message
241 GAS_handle_reservation_request (void *cls, struct GNUNET_SERVER_Client *client,
242 const struct GNUNET_MessageHeader *message)
244 const struct ReservationRequestMessage *msg =
245 (const struct ReservationRequestMessage *) message;
246 struct ReservationResultMessage result;
248 struct GNUNET_TIME_Relative res_delay;
250 if (NULL == find_client (client))
252 /* missing start message! */
254 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
257 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
258 "RESERVATION_REQUEST");
259 amount = (int32_t) ntohl (msg->amount);
260 res_delay = GAS_reservations_reserve (&msg->peer, amount);
261 if (res_delay.rel_value > 0)
263 result.header.size = htons (sizeof (struct ReservationResultMessage));
264 result.header.type = htons (GNUNET_MESSAGE_TYPE_ATS_RESERVATION_RESULT);
265 result.amount = htonl (amount);
266 result.peer = msg->peer;
267 result.res_delay = GNUNET_TIME_relative_hton (res_delay);
268 GNUNET_STATISTICS_update (GSA_stats, "# reservation requests processed", 1,
270 GNUNET_SERVER_notification_context_unicast (nc, client, &result.header,
272 GNUNET_SERVER_receive_done (client, GNUNET_OK);
277 * Handle 'preference change' messages from clients.
279 * @param cls unused, NULL
280 * @param client client that sent the request
281 * @param message the request message
284 GAS_handle_preference_change (void *cls, struct GNUNET_SERVER_Client *client,
285 const struct GNUNET_MessageHeader *message)
287 const struct ChangePreferenceMessage *msg;
288 const struct PreferenceInformation *pi;
293 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
294 "PREFERENCE_CHANGE");
295 msize = ntohs (message->size);
296 if (msize < sizeof (struct ChangePreferenceMessage))
299 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
302 msg = (const struct ChangePreferenceMessage *) message;
303 nump = ntohl (msg->num_preferences);
305 sizeof (struct ChangePreferenceMessage) +
306 nump * sizeof (struct PreferenceInformation))
309 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
312 GNUNET_STATISTICS_update (GSA_stats, "# preference change requests processed",
314 pi = (const struct PreferenceInformation *) &msg[1];
315 for (i = 0; i < nump; i++)
316 GAS_addresses_change_preference (&msg->peer,
317 (enum GNUNET_ATS_PreferenceKind)
318 ntohl (pi[i].preference_kind),
319 pi[i].preference_value);
320 GNUNET_SERVER_receive_done (client, GNUNET_OK);
325 * Initialize performance subsystem.
327 * @param server handle to our server
330 GAS_performance_init (struct GNUNET_SERVER_Handle *server)
332 nc = GNUNET_SERVER_notification_context_create (server, 128);
337 * Shutdown performance subsystem.
340 GAS_performance_done ()
342 GNUNET_SERVER_notification_context_destroy (nc);
346 /* end of gnunet-service-ats_performance.c */