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.
10 GNUnet is distributed in the hope that it will be useful, but
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 *peer,
100 const char *plugin_name,
101 const void *plugin_addr, size_t plugin_addr_len,
103 const struct GNUNET_ATS_Information *atsi,
105 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
106 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in)
108 struct AddressSuggestionMessage *msg;
109 size_t plugin_name_length = strlen (plugin_name) + 1;
110 size_t msize = sizeof (struct AddressSuggestionMessage) + atsi_count * sizeof (struct GNUNET_ATS_Information)
111 + plugin_addr_len + plugin_name_length;
113 struct GNUNET_ATS_Information *atsp;
116 if (my_client == NULL)
118 GNUNET_STATISTICS_update (GSA_stats,
119 "# address suggestions made",
122 GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
123 GNUNET_assert (atsi_count < GNUNET_SERVER_MAX_MESSAGE_SIZE / sizeof (struct GNUNET_ATS_Information));
124 msg = (struct AddressSuggestionMessage*) buf;
125 msg->header.size = htons (msize);
126 msg->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_ADDRESS_SUGGESTION);
127 msg->ats_count = htonl (atsi_count);
129 msg->address_length = htons (plugin_addr_len);
130 msg->plugin_name_length = htons (plugin_name_length);
131 msg->session_id = htonl (session_id);
132 msg->bandwidth_out = bandwidth_out;
133 msg->bandwidth_in = bandwidth_in;
134 atsp = (struct GNUNET_ATS_Information* ) &msg[1];
135 memcpy (atsp, atsi, sizeof (struct GNUNET_ATS_Information) * atsi_count);
136 addrp = (char*) &atsp[atsi_count];
137 memcpy (addrp, plugin_addr, plugin_addr_len);
138 strcpy (&addrp[plugin_addr_len], plugin_name);
139 GNUNET_SERVER_notification_context_unicast (nc,
147 * Handle 'request address' messages from clients.
149 * @param cls unused, NULL
150 * @param client client that sent the request
151 * @param message the request message
154 GAS_handle_request_address (void *cls, struct GNUNET_SERVER_Client *client,
155 const struct GNUNET_MessageHeader *message)
158 const struct RequestAddressMessage * msg = (const struct RequestAddressMessage *) message;
160 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "REQUEST_ADDRESS");
161 GNUNET_STATISTICS_update (GSA_stats,
162 "# address requests received",
165 GNUNET_break (0 == ntohl (msg->reserved));
166 GAS_addresses_request_address (&msg->peer);
167 GNUNET_SERVER_receive_done (client, GNUNET_OK);
172 * Handle 'address update' messages from clients.
174 * @param cls unused, NULL
175 * @param client client that sent the request
176 * @param message the request message
179 GAS_handle_address_update (void *cls, struct GNUNET_SERVER_Client *client,
180 const struct GNUNET_MessageHeader *message)
182 const struct AddressUpdateMessage * m;
183 const struct GNUNET_ATS_Information *atsi;
185 const char *plugin_name;
186 uint16_t address_length;
187 uint16_t plugin_name_length;
191 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
192 "Received `%s' message\n",
194 size = ntohs (message->size);
195 if (size < sizeof (struct AddressUpdateMessage))
198 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
201 m = (const struct AddressUpdateMessage*) message;
202 ats_count = ntohl (m->ats_count);
203 address_length = ntohs (m->address_length);
204 plugin_name_length = ntohs (m->plugin_name_length);
205 atsi = (const struct GNUNET_ATS_Information*) &m[1];
206 address = (const char*) &atsi[ats_count];
207 if (plugin_name_length != 0)
208 plugin_name = &address[address_length];
211 if ( (address_length +
213 ats_count * sizeof (struct GNUNET_ATS_Information) +
214 sizeof (struct AddressUpdateMessage) != ntohs (message->size)) ||
215 (ats_count > GNUNET_SERVER_MAX_MESSAGE_SIZE / sizeof (struct GNUNET_ATS_Information)) ||
216 (plugin_name[plugin_name_length - 1] != '\0') )
219 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
222 GNUNET_STATISTICS_update (GSA_stats,
223 "# address updates received",
226 GAS_addresses_update (&m->peer,
230 ntohl (m->session_id),
233 GNUNET_SERVER_receive_done (client, GNUNET_OK);
238 * Handle 'address destroyed' messages from clients.
240 * @param cls unused, NULL
241 * @param client client that sent the request
242 * @param message the request message
245 GAS_handle_address_destroyed (void *cls, struct GNUNET_SERVER_Client *client,
246 const struct GNUNET_MessageHeader *message)
249 const struct AddressDestroyedMessage * m;
250 struct SessionReleaseMessage srm;
252 const char *plugin_name;
253 uint16_t address_length;
254 uint16_t plugin_name_length;
257 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
258 "Received `%s' message of size %u %u\n",
259 "ADDRESS_DESTROYED", ntohs (message->size), sizeof (struct AddressDestroyedMessage));
260 size = ntohs (message->size);
261 if ( (size < sizeof (struct AddressDestroyedMessage)) ||
262 (client != my_client) )
265 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
268 m = (const struct AddressDestroyedMessage*) message;
269 GNUNET_break (0 == ntohl (m->reserved));
270 address_length = ntohs (m->address_length);
271 plugin_name_length = ntohs (m->plugin_name_length);
272 address = (const char*) &m[1];
273 if (plugin_name_length != 0)
274 plugin_name = &address[address_length];
277 if ( (address_length +
279 sizeof (struct AddressDestroyedMessage) != ntohs (message->size)))
282 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
285 if ( (plugin_name_length != 0) &&
286 (plugin_name[plugin_name_length - 1] != '\0') )
289 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
292 GNUNET_STATISTICS_update (GSA_stats,
293 "# addresses destroyed",
296 GAS_addresses_destroy (&m->peer,
300 ntohl (m->session_id));
301 if (0 != ntohl (m->session_id))
303 srm.header.type = ntohs (GNUNET_MESSAGE_TYPE_ATS_SESSION_RELEASE);
304 srm.header.size = ntohs (sizeof (struct SessionReleaseMessage));
305 srm.session_id = m->session_id;
307 GNUNET_SERVER_notification_context_unicast (nc,
312 GNUNET_SERVER_receive_done (client, GNUNET_OK);
317 * Initialize scheduling subsystem.
319 * @param server handle to our server
322 GAS_scheduling_init (struct GNUNET_SERVER_Handle *server)
324 nc = GNUNET_SERVER_notification_context_create (server, 128);
329 * Shutdown scheduling subsystem.
332 GAS_scheduling_done ()
334 GNUNET_SERVER_notification_context_destroy (nc);
339 /* end of gnunet-service-ats_scheduling.c */