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
8 option) any later version.
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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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16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 * @file ats/gnunet-service-ats_scheduling.c
23 * @brief ats service, interaction with 'scheduling' 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_scheduling.h"
35 * Context for sending messages to clients.
37 static struct GNUNET_SERVER_NotificationContext *nc;
40 * Actual handle to the client.
42 static struct GNUNET_SERVER_Client *my_client;
46 * Register a new scheduling client.
48 * @param client handle of the new client
49 * @return GNUNET_OK on success, GNUNET_SYSERR on error
52 GAS_scheduling_add_client (struct GNUNET_SERVER_Client *client)
54 if (my_client != NULL)
56 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
57 "This ATS already has a scheduling client, refusing new scheduling client for now.\n");
61 GNUNET_SERVER_notification_context_add (nc, client);
67 * Unregister a client (which may have been a scheduling client,
68 * but this is not assured).
70 * @param client handle of the (now dead) client
73 GAS_scheduling_remove_client (struct GNUNET_SERVER_Client *client)
75 if (my_client != client)
77 GAS_addresses_destroy_all ();
83 * Transmit the given address suggestion and bandwidth update to all scheduling
86 * @param peer peer for which this is an address suggestion
87 * @param plugin_name 0-termintated string specifying the transport plugin
88 * @param plugin_addr binary address for the plugin to use
89 * @param plugin_addr_len number of bytes in plugin_addr
90 * @param session_id session ID to use for the given client (other clients will see 0)
91 * @param atsi performance data for the address
92 * @param atsi_count number of performance records in 'ats'
93 * @param bandwidth_out assigned outbound bandwidth
94 * @param bandwidth_in assigned inbound bandwidth
97 GAS_scheduling_transmit_address_suggestion (const struct GNUNET_PeerIdentity
98 *peer, const char *plugin_name,
99 const void *plugin_addr,
100 size_t plugin_addr_len,
102 const struct GNUNET_ATS_Information
103 *atsi, uint32_t atsi_count,
104 struct GNUNET_BANDWIDTH_Value32NBO
106 struct GNUNET_BANDWIDTH_Value32NBO
109 struct AddressSuggestionMessage *msg;
110 size_t plugin_name_length = strlen (plugin_name) + 1;
112 sizeof (struct AddressSuggestionMessage) +
113 atsi_count * sizeof (struct GNUNET_ATS_Information) + plugin_addr_len +
115 char buf[msize] GNUNET_ALIGN;
116 struct GNUNET_ATS_Information *atsp;
119 if (my_client == NULL)
121 GNUNET_STATISTICS_update (GSA_stats, "# address suggestions made", 1,
123 GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
124 GNUNET_assert (atsi_count <
125 GNUNET_SERVER_MAX_MESSAGE_SIZE /
126 sizeof (struct GNUNET_ATS_Information));
127 msg = (struct AddressSuggestionMessage *) buf;
128 msg->header.size = htons (msize);
129 msg->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_ADDRESS_SUGGESTION);
130 msg->ats_count = htonl (atsi_count);
132 msg->address_length = htons (plugin_addr_len);
133 msg->plugin_name_length = htons (plugin_name_length);
134 msg->session_id = htonl (session_id);
135 msg->bandwidth_out = bandwidth_out;
136 msg->bandwidth_in = bandwidth_in;
137 atsp = (struct GNUNET_ATS_Information *) &msg[1];
138 memcpy (atsp, atsi, sizeof (struct GNUNET_ATS_Information) * atsi_count);
139 addrp = (char *) &atsp[atsi_count];
140 memcpy (addrp, plugin_addr, plugin_addr_len);
141 strcpy (&addrp[plugin_addr_len], plugin_name);
143 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
144 "ATS sends quota for peer `%s': (in/out) %u/%u\n",
145 GNUNET_i2s (peer), ntohl (bandwidth_in.value__),
146 ntohl (bandwidth_out.value__));
148 GNUNET_SERVER_notification_context_unicast (nc, my_client, &msg->header,
154 * Handle 'request address' messages from clients.
156 * @param cls unused, NULL
157 * @param client client that sent the request
158 * @param message the request message
161 GAS_handle_request_address (void *cls, struct GNUNET_SERVER_Client *client,
162 const struct GNUNET_MessageHeader *message)
164 const struct RequestAddressMessage *msg =
165 (const struct RequestAddressMessage *) message;
167 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
169 GNUNET_STATISTICS_update (GSA_stats, "# address requests received", 1,
171 GNUNET_break (0 == ntohl (msg->reserved));
172 GAS_addresses_request_address (&msg->peer);
173 GNUNET_SERVER_receive_done (client, GNUNET_OK);
178 * Handle 'request address' messages from clients.
180 * @param cls unused, NULL
181 * @param client client that sent the request
182 * @param message the request message
185 GAS_handle_request_address_cancel (void *cls,
186 struct GNUNET_SERVER_Client *client,
187 const struct GNUNET_MessageHeader *message)
189 const struct RequestAddressMessage *msg =
190 (const struct RequestAddressMessage *) message;
192 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
193 "REQUEST_ADDRESS_CANCEL");
194 GNUNET_break (0 == ntohl (msg->reserved));
198 GNUNET_SERVER_receive_done (client, GNUNET_OK);
202 * Handle 'reset backoff' messages from clients.
204 * @param cls unused, NULL
205 * @param client client that sent the request
206 * @param message the request message
209 GAS_handle_reset_backoff (void *cls,
210 struct GNUNET_SERVER_Client *client,
211 const struct GNUNET_MessageHeader *message)
213 const struct ResetBackoffMessage *msg =
214 (const struct ResetBackoffMessage *) message;
216 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
218 GNUNET_STATISTICS_update (GSA_stats, "# backoff reset requests received", 1,
220 GNUNET_break (0 == ntohl (msg->reserved));
221 GAS_addresses_handle_backoff_reset (&msg->peer);
222 GNUNET_SERVER_receive_done (client, GNUNET_OK);
227 * Handle 'address update' messages from clients.
229 * @param cls unused, NULL
230 * @param client client that sent the request
231 * @param message the request message
234 GAS_handle_address_update (void *cls, struct GNUNET_SERVER_Client *client,
235 const struct GNUNET_MessageHeader *message)
237 const struct AddressUpdateMessage *m;
238 const struct GNUNET_ATS_Information *atsi;
240 const char *plugin_name;
241 uint16_t address_length;
242 uint16_t plugin_name_length;
246 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
248 size = ntohs (message->size);
249 if (size < sizeof (struct AddressUpdateMessage))
252 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
255 m = (const struct AddressUpdateMessage *) message;
256 ats_count = ntohl (m->ats_count);
257 address_length = ntohs (m->address_length);
258 plugin_name_length = ntohs (m->plugin_name_length);
259 atsi = (const struct GNUNET_ATS_Information *) &m[1];
260 address = (const char *) &atsi[ats_count];
261 if (plugin_name_length != 0)
262 plugin_name = &address[address_length];
266 if ((address_length + plugin_name_length +
267 ats_count * sizeof (struct GNUNET_ATS_Information) +
268 sizeof (struct AddressUpdateMessage) != ntohs (message->size)) ||
270 GNUNET_SERVER_MAX_MESSAGE_SIZE / sizeof (struct GNUNET_ATS_Information)) ||
271 ((plugin_name_length > 0) && (plugin_name[plugin_name_length - 1] != '\0')))
274 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
277 GNUNET_STATISTICS_update (GSA_stats, "# address updates received", 1,
279 GAS_addresses_update (&m->peer, plugin_name, address, address_length,
280 ntohl (m->session_id), atsi, ats_count);
281 GNUNET_SERVER_receive_done (client, GNUNET_OK);
286 * Handle 'address in use' messages from clients.
288 * @param cls unused, NULL
289 * @param client client that sent the request
290 * @param message the request message
293 GAS_handle_address_in_use (void *cls, struct GNUNET_SERVER_Client *client,
294 const struct GNUNET_MessageHeader *message)
296 const struct AddressUseMessage *m;
298 const char *plugin_name;
300 uint16_t address_length;
301 uint16_t plugin_name_length;
306 size = ntohs (message->size);
307 if (size < sizeof (struct AddressUseMessage))
310 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
313 m = (const struct AddressUseMessage *) message;
315 address_length = ntohs (m->address_length);
316 plugin_name_length = ntohs (m->plugin_name_length);
318 address = (const char *) &m[1];
319 if (plugin_name_length != 0)
320 plugin_name = &address[address_length];
324 if ((address_length + plugin_name_length +
325 sizeof (struct AddressUseMessage) != ntohs (message->size)) ||
326 ((plugin_name_length > 0) &&
327 (plugin_name[plugin_name_length - 1] != '\0')))
330 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
334 in_use = ntohs (m->in_use);
335 res = GAS_addresses_in_use (&m->peer,
339 ntohl (m->session_id),
342 if (res == GNUNET_OK)
343 GNUNET_SERVER_receive_done (client, GNUNET_OK);
347 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
353 * Handle 'address destroyed' messages from clients.
355 * @param cls unused, NULL
356 * @param client client that sent the request
357 * @param message the request message
360 GAS_handle_address_destroyed (void *cls, struct GNUNET_SERVER_Client *client,
361 const struct GNUNET_MessageHeader *message)
363 const struct AddressDestroyedMessage *m;
364 struct SessionReleaseMessage srm;
366 const char *plugin_name;
367 uint16_t address_length;
368 uint16_t plugin_name_length;
371 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message of size %u %u\n",
372 "ADDRESS_DESTROYED", ntohs (message->size),
373 sizeof (struct AddressDestroyedMessage));
374 size = ntohs (message->size);
375 if ((size < sizeof (struct AddressDestroyedMessage)) || (client != my_client))
378 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
381 m = (const struct AddressDestroyedMessage *) message;
382 GNUNET_break (0 == ntohl (m->reserved));
383 address_length = ntohs (m->address_length);
384 plugin_name_length = ntohs (m->plugin_name_length);
385 address = (const char *) &m[1];
386 if (plugin_name_length != 0)
387 plugin_name = &address[address_length];
390 if ((address_length + plugin_name_length +
391 sizeof (struct AddressDestroyedMessage) != ntohs (message->size)))
394 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
397 if ((plugin_name_length == 0) ||
398 (plugin_name[plugin_name_length - 1] != '\0'))
401 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
404 GNUNET_STATISTICS_update (GSA_stats, "# addresses destroyed", 1, GNUNET_NO);
405 GAS_addresses_destroy (&m->peer, plugin_name, address, address_length,
406 ntohl (m->session_id));
407 if (0 != ntohl (m->session_id))
409 srm.header.type = ntohs (GNUNET_MESSAGE_TYPE_ATS_SESSION_RELEASE);
410 srm.header.size = ntohs (sizeof (struct SessionReleaseMessage));
411 srm.session_id = m->session_id;
413 GNUNET_SERVER_notification_context_unicast (nc, client, &srm.header,
416 GNUNET_SERVER_receive_done (client, GNUNET_OK);
421 * Initialize scheduling subsystem.
423 * @param server handle to our server
426 GAS_scheduling_init (struct GNUNET_SERVER_Handle *server)
428 nc = GNUNET_SERVER_notification_context_create (server, 128);
433 * Shutdown scheduling subsystem.
436 GAS_scheduling_done ()
438 if (NULL != my_client)
442 GNUNET_SERVER_notification_context_destroy (nc);
448 /* end of gnunet-service-ats_scheduling.c */