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_addresses.h"
29 #include "gnunet-service-ats_scheduling.h"
34 * Context for sending messages to clients.
36 static struct GNUNET_SERVER_NotificationContext *nc;
39 * Actual handle to the client.
41 static struct GNUNET_SERVER_Client *my_client;
45 * Register a new scheduling client.
47 * @param client handle of the new client
48 * @return GNUNET_OK on success, GNUNET_SYSERR on error
51 GAS_scheduling_add_client (struct GNUNET_SERVER_Client *client)
53 if (my_client != NULL)
55 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
56 "This ATS already has a scheduling client, refusing new scheduling client for now.\n");
60 GNUNET_SERVER_notification_context_add (nc, client);
61 GNUNET_SERVER_client_keep (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 ();
78 GNUNET_SERVER_client_drop (client);
84 * Transmit the given address suggestion and bandwidth update to all scheduling
87 * @param peer peer for which this is an address suggestion
88 * @param plugin_name 0-termintated string specifying the transport plugin
89 * @param plugin_addr binary address for the plugin to use
90 * @param plugin_addr_len number of bytes in plugin_addr
91 * @param session_id session ID to use for the given client (other clients will see 0)
92 * @param atsi performance data for the address
93 * @param atsi_count number of performance records in 'ats'
94 * @param bandwidth_out assigned outbound bandwidth
95 * @param bandwidth_in assigned inbound bandwidth
98 GAS_scheduling_transmit_address_suggestion (const struct GNUNET_PeerIdentity *peer,
99 const char *plugin_name,
100 const void *plugin_addr, size_t plugin_addr_len,
102 const struct GNUNET_ATS_Information *atsi,
104 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
105 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in)
107 struct AddressSuggestionMessage *msg;
108 size_t plugin_name_length = strlen (plugin_name) + 1;
109 size_t msize = sizeof (struct AddressSuggestionMessage) + atsi_count * sizeof (struct GNUNET_ATS_Information)
110 + plugin_addr_len + plugin_name_length;
112 struct GNUNET_ATS_Information *atsp;
115 if (my_client == NULL)
117 GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
118 GNUNET_assert (atsi_count < GNUNET_SERVER_MAX_MESSAGE_SIZE / sizeof (struct GNUNET_ATS_Information));
119 msg = (struct AddressSuggestionMessage*) buf;
120 msg->header.size = htons (msize);
121 msg->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_ADDRESS_SUGGESTION);
122 msg->ats_count = htonl (atsi_count);
124 msg->address_length = htons (plugin_addr_len);
125 msg->plugin_name_length = htons (plugin_name_length);
126 msg->session_id = htonl (session_id);
127 msg->bandwidth_out = bandwidth_out;
128 msg->bandwidth_in = bandwidth_in;
129 atsp = (struct GNUNET_ATS_Information* ) &msg[1];
130 memcpy (atsp, atsi, sizeof (struct GNUNET_ATS_Information) * atsi_count);
131 addrp = (char*) &atsp[atsi_count];
132 memcpy (addrp, plugin_addr, plugin_addr_len);
133 strcpy (&addrp[plugin_addr_len], plugin_name);
134 GNUNET_SERVER_notification_context_unicast (nc,
142 * Handle 'request address' messages from clients.
144 * @param cls unused, NULL
145 * @param client client that sent the request
146 * @param message the request message
149 GAS_handle_request_address (void *cls, struct GNUNET_SERVER_Client *client,
150 const struct GNUNET_MessageHeader *message)
153 const struct RequestAddressMessage * msg = (const struct RequestAddressMessage *) message;
155 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "REQUEST_ADDRESS");
156 GNUNET_break (0 == ntohl (msg->reserved));
157 GAS_addresses_request_address (&msg->peer);
158 GNUNET_SERVER_receive_done (client, GNUNET_OK);
163 * Handle 'address update' messages from clients.
165 * @param cls unused, NULL
166 * @param client client that sent the request
167 * @param message the request message
170 GAS_handle_address_update (void *cls, struct GNUNET_SERVER_Client *client,
171 const struct GNUNET_MessageHeader *message)
173 const struct AddressUpdateMessage * m;
174 const struct GNUNET_ATS_Information *atsi;
176 const char *plugin_name;
177 uint16_t address_length;
178 uint16_t plugin_name_length;
182 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
183 "Received `%s' message\n",
185 size = ntohs (message->size);
186 if (size <= sizeof (struct AddressUpdateMessage))
189 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
192 m = (const struct AddressUpdateMessage*) message;
193 ats_count = ntohl (m->ats_count);
194 address_length = ntohs (m->address_length);
195 plugin_name_length = ntohs (m->plugin_name_length);
196 atsi = (const struct GNUNET_ATS_Information*) &m[1];
197 address = (const char*) &atsi[ats_count];
198 if (plugin_name_length != 0)
199 plugin_name = &address[address_length];
202 if ( (address_length +
204 ats_count * sizeof (struct GNUNET_ATS_Information) +
205 sizeof (struct AddressUpdateMessage) != ntohs (message->size)) ||
206 (ats_count > GNUNET_SERVER_MAX_MESSAGE_SIZE / sizeof (struct GNUNET_ATS_Information)) ||
207 (plugin_name[plugin_name_length - 1] != '\0') )
210 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
213 GAS_addresses_update (&m->peer,
217 ntohl (m->session_id),
220 GNUNET_SERVER_receive_done (client, GNUNET_OK);
225 * Handle 'address destroyed' messages from clients.
227 * @param cls unused, NULL
228 * @param client client that sent the request
229 * @param message the request message
232 GAS_handle_address_destroyed (void *cls, struct GNUNET_SERVER_Client *client,
233 const struct GNUNET_MessageHeader *message)
236 const struct AddressDestroyedMessage * m;
238 const char *plugin_name;
239 uint16_t address_length;
240 uint16_t plugin_name_length;
243 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
244 "Received `%s' message of size %u %u\n",
245 "ADDRESS_DESTROYED", ntohs (message->size), sizeof (struct AddressDestroyedMessage));
246 size = ntohs (message->size);
247 if ( (size < sizeof (struct AddressDestroyedMessage)) ||
248 (client != my_client) )
251 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
254 m = (const struct AddressDestroyedMessage*) message;
255 GNUNET_break (0 == ntohl (m->reserved));
256 address_length = ntohs (m->address_length);
257 plugin_name_length = ntohs (m->plugin_name_length);
258 address = (const char*) &m[1];
259 if (plugin_name_length != 0)
260 plugin_name = &address[address_length];
263 if ( (address_length +
265 sizeof (struct AddressDestroyedMessage) != ntohs (message->size)))
268 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
271 if ( (plugin_name_length != 0) &&
272 (plugin_name[plugin_name_length - 1] != '\0') )
275 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
278 GAS_addresses_destroy (&m->peer,
282 ntohl (m->session_id));
283 GNUNET_SERVER_receive_done (client, GNUNET_OK);
288 * Initialize scheduling subsystem.
290 * @param server handle to our server
293 GAS_scheduling_init (struct GNUNET_SERVER_Handle *server)
295 nc = GNUNET_SERVER_notification_context_create (server, 128);
300 * Shutdown scheduling subsystem.
303 GAS_scheduling_done ()
305 GNUNET_SERVER_notification_context_destroy (nc);
310 /* end of gnunet-service-ats_scheduling.c */