2 This file is part of GNUnet.
3 (C) 2011 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
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.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
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);
62 GNUNET_SERVER_client_keep (client);
68 * Unregister a client (which may have been a scheduling client,
69 * but this is not assured).
71 * @param client handle of the (now dead) client
74 GAS_scheduling_remove_client (struct GNUNET_SERVER_Client *client)
76 if (my_client != client)
78 GAS_addresses_destroy_all ();
79 GNUNET_SERVER_client_drop (client);
85 * Transmit the given address suggestion and bandwidth update to all scheduling
88 * @param peer peer for which this is an address suggestion
89 * @param plugin_name 0-termintated string specifying the transport plugin
90 * @param plugin_addr binary address for the plugin to use
91 * @param plugin_addr_len number of bytes in plugin_addr
92 * @param session_id session ID to use for the given client (other clients will see 0)
93 * @param atsi performance data for the address
94 * @param atsi_count number of performance records in 'ats'
95 * @param bandwidth_out assigned outbound bandwidth
96 * @param bandwidth_in assigned inbound bandwidth
99 GAS_scheduling_transmit_address_suggestion (const struct GNUNET_PeerIdentity
100 *peer, const char *plugin_name,
101 const void *plugin_addr,
102 size_t plugin_addr_len,
104 const struct GNUNET_ATS_Information
105 *atsi, uint32_t atsi_count,
106 struct GNUNET_BANDWIDTH_Value32NBO
108 struct GNUNET_BANDWIDTH_Value32NBO
111 struct AddressSuggestionMessage *msg;
112 size_t plugin_name_length = strlen (plugin_name) + 1;
114 sizeof (struct AddressSuggestionMessage) +
115 atsi_count * sizeof (struct GNUNET_ATS_Information) + plugin_addr_len +
118 struct GNUNET_ATS_Information *atsp;
121 if (my_client == NULL)
123 GNUNET_STATISTICS_update (GSA_stats, "# address suggestions made", 1,
125 GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
126 GNUNET_assert (atsi_count <
127 GNUNET_SERVER_MAX_MESSAGE_SIZE /
128 sizeof (struct GNUNET_ATS_Information));
129 msg = (struct AddressSuggestionMessage *) buf;
130 msg->header.size = htons (msize);
131 msg->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_ADDRESS_SUGGESTION);
132 msg->ats_count = htonl (atsi_count);
134 msg->address_length = htons (plugin_addr_len);
135 msg->plugin_name_length = htons (plugin_name_length);
136 msg->session_id = htonl (session_id);
137 msg->bandwidth_out = bandwidth_out;
138 msg->bandwidth_in = bandwidth_in;
139 atsp = (struct GNUNET_ATS_Information *) &msg[1];
140 memcpy (atsp, atsi, sizeof (struct GNUNET_ATS_Information) * atsi_count);
141 addrp = (char *) &atsp[atsi_count];
142 memcpy (addrp, plugin_addr, plugin_addr_len);
143 strcpy (&addrp[plugin_addr_len], plugin_name);
144 GNUNET_SERVER_notification_context_unicast (nc, my_client, &msg->header,
150 * Handle 'request address' messages from clients.
152 * @param cls unused, NULL
153 * @param client client that sent the request
154 * @param message the request message
157 GAS_handle_request_address (void *cls, struct GNUNET_SERVER_Client *client,
158 const struct GNUNET_MessageHeader *message)
160 const struct RequestAddressMessage *msg =
161 (const struct RequestAddressMessage *) message;
163 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
165 GNUNET_STATISTICS_update (GSA_stats, "# address requests received", 1,
167 GNUNET_break (0 == ntohl (msg->reserved));
168 GAS_addresses_request_address (&msg->peer);
169 GNUNET_SERVER_receive_done (client, GNUNET_OK);
174 * Handle 'address update' messages from clients.
176 * @param cls unused, NULL
177 * @param client client that sent the request
178 * @param message the request message
181 GAS_handle_address_update (void *cls, struct GNUNET_SERVER_Client *client,
182 const struct GNUNET_MessageHeader *message)
184 const struct AddressUpdateMessage *m;
185 const struct GNUNET_ATS_Information *atsi;
187 const char *plugin_name;
188 uint16_t address_length;
189 uint16_t plugin_name_length;
193 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
195 size = ntohs (message->size);
196 if (size < sizeof (struct AddressUpdateMessage))
199 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
202 m = (const struct AddressUpdateMessage *) message;
203 ats_count = ntohl (m->ats_count);
204 address_length = ntohs (m->address_length);
205 plugin_name_length = ntohs (m->plugin_name_length);
206 atsi = (const struct GNUNET_ATS_Information *) &m[1];
207 address = (const char *) &atsi[ats_count];
208 if (plugin_name_length != 0)
209 plugin_name = &address[address_length];
212 if ((address_length + plugin_name_length +
213 ats_count * sizeof (struct GNUNET_ATS_Information) +
214 sizeof (struct AddressUpdateMessage) != ntohs (message->size)) ||
216 GNUNET_SERVER_MAX_MESSAGE_SIZE / sizeof (struct GNUNET_ATS_Information))
217 || (plugin_name[plugin_name_length - 1] != '\0'))
220 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
223 GNUNET_STATISTICS_update (GSA_stats, "# address updates received", 1,
225 GAS_addresses_update (&m->peer, plugin_name, address, address_length,
226 ntohl (m->session_id), atsi, ats_count);
227 GNUNET_SERVER_receive_done (client, GNUNET_OK);
232 * Handle 'address in use' messages from clients.
234 * @param cls unused, NULL
235 * @param client client that sent the request
236 * @param message the request message
239 GAS_handle_address_in_use (void *cls, struct GNUNET_SERVER_Client *client,
240 const struct GNUNET_MessageHeader *message)
242 const struct AddressUseMessage *m;
244 const char *plugin_name;
245 uint16_t address_length;
246 uint16_t plugin_name_length;
250 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
252 size = ntohs (message->size);
253 if (size < sizeof (struct AddressUseMessage))
256 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
259 m = (const struct AddressUseMessage *) message;
261 address_length = ntohs (m->address_length);
262 plugin_name_length = ntohs (m->plugin_name_length);
264 address = (const char *) &m[1];
265 if (plugin_name_length != 0)
266 plugin_name = &address[address_length];
270 if ((address_length + plugin_name_length +
271 sizeof (struct AddressUseMessage) != ntohs (message->size)) ||
272 (plugin_name[plugin_name_length - 1] != '\0'))
275 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
281 GAS_addresses_update (&m->peer,
285 ntohl (m->session_id),
289 GNUNET_SERVER_receive_done (client, GNUNET_OK);
293 * Handle 'address destroyed' messages from clients.
295 * @param cls unused, NULL
296 * @param client client that sent the request
297 * @param message the request message
300 GAS_handle_address_destroyed (void *cls, struct GNUNET_SERVER_Client *client,
301 const struct GNUNET_MessageHeader *message)
303 const struct AddressDestroyedMessage *m;
304 struct SessionReleaseMessage srm;
306 const char *plugin_name;
307 uint16_t address_length;
308 uint16_t plugin_name_length;
311 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message of size %u %u\n",
312 "ADDRESS_DESTROYED", ntohs (message->size),
313 sizeof (struct AddressDestroyedMessage));
314 size = ntohs (message->size);
315 if ((size < sizeof (struct AddressDestroyedMessage)) || (client != my_client))
318 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
321 m = (const struct AddressDestroyedMessage *) message;
322 GNUNET_break (0 == ntohl (m->reserved));
323 address_length = ntohs (m->address_length);
324 plugin_name_length = ntohs (m->plugin_name_length);
325 address = (const char *) &m[1];
326 if (plugin_name_length != 0)
327 plugin_name = &address[address_length];
330 if ((address_length + plugin_name_length +
331 sizeof (struct AddressDestroyedMessage) != ntohs (message->size)))
334 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
337 if ((plugin_name_length != 0) &&
338 (plugin_name[plugin_name_length - 1] != '\0'))
341 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
344 GNUNET_STATISTICS_update (GSA_stats, "# addresses destroyed", 1, GNUNET_NO);
345 GAS_addresses_destroy (&m->peer, plugin_name, address, address_length,
346 ntohl (m->session_id));
347 if (0 != ntohl (m->session_id))
349 srm.header.type = ntohs (GNUNET_MESSAGE_TYPE_ATS_SESSION_RELEASE);
350 srm.header.size = ntohs (sizeof (struct SessionReleaseMessage));
351 srm.session_id = m->session_id;
353 GNUNET_SERVER_notification_context_unicast (nc, client, &srm.header,
356 GNUNET_SERVER_receive_done (client, GNUNET_OK);
361 * Initialize scheduling subsystem.
363 * @param server handle to our server
366 GAS_scheduling_init (struct GNUNET_SERVER_Handle *server)
368 nc = GNUNET_SERVER_notification_context_create (server, 128);
373 * Shutdown scheduling subsystem.
376 GAS_scheduling_done ()
378 GNUNET_SERVER_notification_context_destroy (nc);
383 /* end of gnunet-service-ats_scheduling.c */