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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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 * Handle to address subsystem
48 static struct GAS_Addresses_Handle *address_handle;
51 * Register a new scheduling client.
53 * @param client handle of the new client
54 * @return GNUNET_OK on success, GNUNET_SYSERR on error
57 GAS_scheduling_add_client (struct GNUNET_SERVER_Client *client)
59 if (my_client != NULL)
61 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
62 "This ATS already has a scheduling client, refusing new scheduling client for now.\n");
66 GNUNET_SERVER_notification_context_add (nc, client);
72 * Unregister a client (which may have been a scheduling client,
73 * but this is not assured).
75 * @param client handle of the (now dead) client
78 GAS_scheduling_remove_client (struct GNUNET_SERVER_Client *client)
80 if (my_client != client)
82 GAS_addresses_destroy_all (address_handle);
88 * Transmit the given address suggestion and bandwidth update to all scheduling
91 * @param peer peer for which this is an address suggestion
92 * @param plugin_name 0-termintated string specifying the transport plugin
93 * @param plugin_addr binary address for the plugin to use
94 * @param plugin_addr_len number of bytes in plugin_addr
95 * @param session_id session ID to use for the given client (other clients will see 0)
96 * @param atsi performance data for the address
97 * @param atsi_count number of performance records in 'ats'
98 * @param bandwidth_out assigned outbound bandwidth
99 * @param bandwidth_in assigned inbound bandwidth
102 GAS_scheduling_transmit_address_suggestion (const struct GNUNET_PeerIdentity
104 const char *plugin_name,
105 const void *plugin_addr,
106 size_t plugin_addr_len,
107 uint32_t local_address_info,
109 const struct GNUNET_ATS_Information *atsi,
111 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
112 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in)
114 struct AddressSuggestionMessage *msg;
115 size_t plugin_name_length = strlen (plugin_name) + 1;
117 sizeof (struct AddressSuggestionMessage) +
118 atsi_count * sizeof (struct GNUNET_ATS_Information) + plugin_addr_len +
120 char buf[msize] GNUNET_ALIGN;
121 struct GNUNET_ATS_Information *atsp;
124 if (my_client == NULL)
126 GNUNET_STATISTICS_update (GSA_stats, "# address suggestions made", 1,
128 GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
129 GNUNET_assert (atsi_count <
130 GNUNET_SERVER_MAX_MESSAGE_SIZE /
131 sizeof (struct GNUNET_ATS_Information));
132 msg = (struct AddressSuggestionMessage *) buf;
133 msg->header.size = htons (msize);
134 msg->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_ADDRESS_SUGGESTION);
135 msg->ats_count = htonl (atsi_count);
137 msg->address_length = htons (plugin_addr_len);
138 msg->plugin_name_length = htons (plugin_name_length);
139 msg->address_local_info = htonl (local_address_info);
140 msg->session_id = htonl (session_id);
141 msg->bandwidth_out = bandwidth_out;
142 msg->bandwidth_in = bandwidth_in;
143 atsp = (struct GNUNET_ATS_Information *) &msg[1];
144 memcpy (atsp, atsi, sizeof (struct GNUNET_ATS_Information) * atsi_count);
145 addrp = (char *) &atsp[atsi_count];
146 memcpy (addrp, plugin_addr, plugin_addr_len);
147 strcpy (&addrp[plugin_addr_len], plugin_name);
149 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
150 "ATS sends quota for peer `%s': (in/out) %u/%u\n",
152 (unsigned int) ntohl (bandwidth_in.value__),
153 (unsigned int) ntohl (bandwidth_out.value__));
155 GNUNET_SERVER_notification_context_unicast (nc, my_client, &msg->header,
161 * Handle 'request address' messages from clients.
163 * @param cls unused, NULL
164 * @param client client that sent the request
165 * @param message the request message
168 GAS_handle_request_address (void *cls, struct GNUNET_SERVER_Client *client,
169 const struct GNUNET_MessageHeader *message)
171 const struct RequestAddressMessage *msg =
172 (const struct RequestAddressMessage *) message;
174 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
176 GNUNET_break (0 == ntohl (msg->reserved));
177 GAS_addresses_request_address (address_handle, &msg->peer);
178 GNUNET_SERVER_receive_done (client, GNUNET_OK);
183 * Handle 'request address' messages from clients.
185 * @param cls unused, NULL
186 * @param client client that sent the request
187 * @param message the request message
190 GAS_handle_request_address_cancel (void *cls,
191 struct GNUNET_SERVER_Client *client,
192 const struct GNUNET_MessageHeader *message)
194 const struct RequestAddressMessage *msg =
195 (const struct RequestAddressMessage *) message;
197 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
198 "REQUEST_ADDRESS_CANCEL");
199 GNUNET_break (0 == ntohl (msg->reserved));
201 GAS_addresses_request_address_cancel (address_handle, &msg->peer);
203 GNUNET_SERVER_receive_done (client, GNUNET_OK);
207 * Handle 'reset backoff' messages from clients.
209 * @param cls unused, NULL
210 * @param client client that sent the request
211 * @param message the request message
214 GAS_handle_reset_backoff (void *cls,
215 struct GNUNET_SERVER_Client *client,
216 const struct GNUNET_MessageHeader *message)
218 const struct ResetBackoffMessage *msg =
219 (const struct ResetBackoffMessage *) message;
221 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
223 GNUNET_break (0 == ntohl (msg->reserved));
224 GAS_addresses_handle_backoff_reset (address_handle, &msg->peer);
225 GNUNET_SERVER_receive_done (client, GNUNET_OK);
229 * Handle 'address add' messages from clients.
231 * @param cls unused, NULL
232 * @param client client that sent the request
233 * @param message the request message
236 GAS_handle_address_add (void *cls, struct GNUNET_SERVER_Client *client,
237 const struct GNUNET_MessageHeader *message)
239 const struct AddressUpdateMessage *m;
240 const struct GNUNET_ATS_Information *atsi;
242 const char *plugin_name;
243 uint16_t address_length;
244 uint16_t plugin_name_length;
248 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
250 size = ntohs (message->size);
251 if (size < sizeof (struct AddressUpdateMessage))
254 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
257 m = (const struct AddressUpdateMessage *) message;
258 ats_count = ntohl (m->ats_count);
259 address_length = ntohs (m->address_length);
260 plugin_name_length = ntohs (m->plugin_name_length);
261 atsi = (const struct GNUNET_ATS_Information *) &m[1];
262 address = (const char *) &atsi[ats_count];
263 if (plugin_name_length != 0)
264 plugin_name = &address[address_length];
268 if ((address_length + plugin_name_length +
269 ats_count * sizeof (struct GNUNET_ATS_Information) +
270 sizeof (struct AddressUpdateMessage) != ntohs (message->size)) ||
272 GNUNET_SERVER_MAX_MESSAGE_SIZE / sizeof (struct GNUNET_ATS_Information)) ||
273 ((plugin_name_length > 0) && (plugin_name[plugin_name_length - 1] != '\0')))
276 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
279 GNUNET_STATISTICS_update (GSA_stats, "# address updates received", 1,
281 GAS_addresses_add (address_handle, &m->peer, plugin_name, address, address_length,
282 ntohl(m->address_local_info), ntohl (m->session_id), atsi, ats_count);
283 GNUNET_SERVER_receive_done (client, GNUNET_OK);
288 * Handle 'address update' messages from clients.
290 * @param cls unused, NULL
291 * @param client client that sent the request
292 * @param message the request message
295 GAS_handle_address_update (void *cls, struct GNUNET_SERVER_Client *client,
296 const struct GNUNET_MessageHeader *message)
298 const struct AddressUpdateMessage *m;
299 const struct GNUNET_ATS_Information *atsi;
301 const char *plugin_name;
302 uint16_t address_length;
303 uint16_t plugin_name_length;
307 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
309 size = ntohs (message->size);
310 if (size < sizeof (struct AddressUpdateMessage))
313 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
316 m = (const struct AddressUpdateMessage *) message;
317 ats_count = ntohl (m->ats_count);
318 address_length = ntohs (m->address_length);
319 plugin_name_length = ntohs (m->plugin_name_length);
320 atsi = (const struct GNUNET_ATS_Information *) &m[1];
321 address = (const char *) &atsi[ats_count];
322 if (plugin_name_length != 0)
323 plugin_name = &address[address_length];
327 if ((address_length + plugin_name_length +
328 ats_count * sizeof (struct GNUNET_ATS_Information) +
329 sizeof (struct AddressUpdateMessage) != ntohs (message->size)) ||
331 GNUNET_SERVER_MAX_MESSAGE_SIZE / sizeof (struct GNUNET_ATS_Information)) ||
332 ((plugin_name_length > 0) && (plugin_name[plugin_name_length - 1] != '\0')))
335 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
338 GNUNET_STATISTICS_update (GSA_stats, "# address updates received", 1,
340 GAS_addresses_update (address_handle, &m->peer, plugin_name, address, address_length,
341 ntohl (m->address_local_info),
342 ntohl (m->session_id), atsi, ats_count);
343 GNUNET_SERVER_receive_done (client, GNUNET_OK);
348 * Handle 'address in use' messages from clients.
350 * @param cls unused, NULL
351 * @param client client that sent the request
352 * @param message the request message
355 GAS_handle_address_in_use (void *cls, struct GNUNET_SERVER_Client *client,
356 const struct GNUNET_MessageHeader *message)
358 const struct AddressUseMessage *m;
360 const char *plugin_name;
362 uint16_t address_length;
363 uint16_t plugin_name_length;
368 size = ntohs (message->size);
369 if (size < sizeof (struct AddressUseMessage))
372 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
375 m = (const struct AddressUseMessage *) message;
377 address_length = ntohs (m->address_length);
378 plugin_name_length = ntohs (m->plugin_name_length);
380 address = (const char *) &m[1];
381 if (plugin_name_length != 0)
382 plugin_name = &address[address_length];
386 if ((address_length + plugin_name_length +
387 sizeof (struct AddressUseMessage) != ntohs (message->size)) ||
388 ((plugin_name_length > 0) &&
389 (plugin_name[plugin_name_length - 1] != '\0')))
392 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
396 in_use = ntohs (m->in_use);
397 res = GAS_addresses_in_use (address_handle,
402 ntohl (m->address_local_info),
403 ntohl (m->session_id),
406 if (res == GNUNET_OK)
407 GNUNET_SERVER_receive_done (client, GNUNET_OK);
411 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
417 * Handle 'address destroyed' messages from clients.
419 * @param cls unused, NULL
420 * @param client client that sent the request
421 * @param message the request message
424 GAS_handle_address_destroyed (void *cls, struct GNUNET_SERVER_Client *client,
425 const struct GNUNET_MessageHeader *message)
427 const struct AddressDestroyedMessage *m;
428 struct SessionReleaseMessage srm;
430 const char *plugin_name;
431 uint16_t address_length;
432 uint16_t plugin_name_length;
435 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message of size %u %u\n",
436 "ADDRESS_DESTROYED", ntohs (message->size),
437 sizeof (struct AddressDestroyedMessage));
438 size = ntohs (message->size);
439 if ((size < sizeof (struct AddressDestroyedMessage)) || (client != my_client))
442 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
445 m = (const struct AddressDestroyedMessage *) message;
446 GNUNET_break (0 == ntohl (m->reserved));
447 address_length = ntohs (m->address_length);
448 plugin_name_length = ntohs (m->plugin_name_length);
449 address = (const char *) &m[1];
450 if (plugin_name_length != 0)
451 plugin_name = &address[address_length];
454 if ((address_length + plugin_name_length +
455 sizeof (struct AddressDestroyedMessage) != ntohs (message->size)))
458 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
461 if ((plugin_name_length == 0) ||
462 (plugin_name[plugin_name_length - 1] != '\0'))
465 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
468 GNUNET_STATISTICS_update (GSA_stats, "# addresses destroyed", 1, GNUNET_NO);
469 GAS_addresses_destroy (address_handle, &m->peer, plugin_name,
470 address, address_length,
471 ntohl (m->address_local_info),
472 ntohl (m->session_id));
473 if (0 != ntohl (m->session_id))
475 srm.header.type = ntohs (GNUNET_MESSAGE_TYPE_ATS_SESSION_RELEASE);
476 srm.header.size = ntohs (sizeof (struct SessionReleaseMessage));
477 srm.session_id = m->session_id;
479 GNUNET_SERVER_notification_context_unicast (nc, client, &srm.header,
482 GNUNET_SERVER_receive_done (client, GNUNET_OK);
487 * Initialize scheduling subsystem.
489 * @param server handle to our server
490 * @param ah the address handle to use
493 GAS_scheduling_init (struct GNUNET_SERVER_Handle *server, struct GAS_Addresses_Handle *ah)
495 GNUNET_assert (NULL != ah);
497 nc = GNUNET_SERVER_notification_context_create (server, 128);
502 * Shutdown scheduling subsystem.
505 GAS_scheduling_done ()
507 if (NULL != my_client)
511 GNUNET_SERVER_notification_context_destroy (nc);
517 /* end of gnunet-service-ats_scheduling.c */