2 This file is part of GNUnet.
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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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17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
24 * @author Julius Bünger
27 #include "gnunet_util_lib.h"
29 #include "gnunet_rps_service.h"
33 #define LOG(kind,...) GNUNET_log_from (kind, "rps-api",__VA_ARGS__)
36 * Handler to handle requests from a client.
38 struct GNUNET_RPS_Handle
41 * The handle to the client configuration.
43 const struct GNUNET_CONFIGURATION_Handle *cfg;
46 * The connection to the client.
48 struct GNUNET_CLIENT_Connection *conn;
51 * The message queue to the client.
53 struct GNUNET_MQ_Handle *mq;
58 * Handler to single requests from the client.
60 struct GNUNET_RPS_Request_Handle
63 * The client issuing the request.
65 struct GNUNET_RPS_Handle *h;
68 * The nuber of the request.
73 * The callback to be called when we receive an answer.
75 GNUNET_RPS_NotifyReadyCB ready_cb;
78 * The closure for the callback.
85 * Array of Request_Handles.
87 struct GNUNET_RPS_Request_Handle *req_handlers = NULL;
90 * Current length of req_handlers.
92 unsigned int req_handlers_size = 0;
96 * Struct used to pack the callback, its closure (provided by the caller)
97 * and the connection handler to the service to pass it to a callback function.
102 * Callback provided by the client
104 GNUNET_RPS_NotifyReadyCB cb;
107 * Closure provided by the client
112 * Handle to the service connection
114 struct GNUNET_CLIENT_Connection *service_conn;
119 * This function is called, when the service replies to our request.
120 * It calls the callback the caller gave us with the provided closure
121 * and disconnects afterwards.
123 * @param cls the closure
124 * @param message the message
127 handle_reply (void *cls,
128 const struct GNUNET_MessageHeader *message)
130 struct GNUNET_RPS_CS_ReplyMessage *msg;
131 struct GNUNET_PeerIdentity *peers;
132 struct GNUNET_RPS_Request_Handle *rh;
134 /* Give the peers back */
135 msg = (struct GNUNET_RPS_CS_ReplyMessage *) message;
136 peers = (struct GNUNET_PeerIdentity *) &msg[1];
137 rh = &req_handlers[msg->n];
138 rh->ready_cb((rh)->ready_cb_cls, msg->num_peers, peers); // FIXME? ntohl ()
141 //GNUNET_CLIENT_disconnect(pack->service_conn);
146 * Error handler for mq.
148 * This function is called whan mq encounters an error.
149 * Until now mq doesn't provide useful error messages.
151 * @param cls the closure
152 * @param error error code without specyfied meaning
155 mq_error_handler (void *cls, enum GNUNET_MQ_Error error)
158 LOG (GNUNET_ERROR_TYPE_WARNING, "Some problem with the message queue. error: %i\n\
167 * Connect to the rps service
169 * @param cfg configuration to use
170 * @return a handle to the service
172 struct GNUNET_RPS_Handle *
173 GNUNET_RPS_connect (const struct GNUNET_CONFIGURATION_Handle *cfg)
175 struct GNUNET_RPS_Handle *h;
176 //struct GNUNET_RPS_Request_Handle *rh;
177 static const struct GNUNET_MQ_MessageHandler mq_handlers[] = {
178 {&handle_reply, GNUNET_MESSAGE_TYPE_RPS_CS_REPLY, 0},
179 GNUNET_MQ_HANDLERS_END
182 h = GNUNET_new(struct GNUNET_RPS_Handle);
183 //h->cfg = GNUNET_new(struct GNUNET_CONFIGURATION_Handle);
185 h->cfg = cfg; // FIXME |^
186 h->conn = GNUNET_CLIENT_connect("rps", cfg);
187 h->mq = GNUNET_MQ_queue_for_connection_client(h->conn,
189 mq_error_handler, // TODO implement
197 * Request n random peers.
199 * @param h handle to the rps service
200 * @param n number of peers we want to receive
201 * @param ready_cb the callback called when the peers are available
202 * @param cls closure given to the callback
203 * @return a handle to cancel this request
205 struct GNUNET_RPS_Request_Handle *
206 GNUNET_RPS_request_peers (struct GNUNET_RPS_Handle *h, uint32_t n,
207 GNUNET_RPS_NotifyReadyCB ready_cb,
210 struct GNUNET_RPS_Request_Handle *rh;
211 struct GNUNET_MQ_Envelope *ev;
212 struct GNUNET_RPS_CS_RequestMessage *msg;
214 // assert func != NULL
215 rh = GNUNET_new (struct GNUNET_RPS_Request_Handle);
217 rh->n = req_handlers_size; // TODO ntoh
218 rh->ready_cb = ready_cb;
219 rh->ready_cb_cls = cls;
221 GNUNET_array_append (req_handlers, req_handlers_size, *rh);
222 //memcpy(&req_handlers[req_handlers_size-1], rh, sizeof(struct GNUNET_RPS_Request_Handle));
224 ev = GNUNET_MQ_msg (msg, GNUNET_MESSAGE_TYPE_RPS_CS_REQUEST);
225 msg->num_peers = htonl (n);
227 GNUNET_MQ_send (h->mq, ev);
233 * Seed rps service with peerIDs.
235 * @param h handle to the rps service
236 * @param n number of peers to seed
237 * @param ids the ids of the peers seeded
240 GNUNET_RPS_seed_ids (struct GNUNET_RPS_Handle *h,
242 const struct GNUNET_PeerIdentity *ids)
244 uint32_t size_needed;
245 uint32_t num_peers_max;
246 const struct GNUNET_PeerIdentity *tmp_peer_pointer;
247 struct GNUNET_MQ_Envelope *ev;
248 struct GNUNET_RPS_CS_SeedMessage *msg;
252 LOG (GNUNET_ERROR_TYPE_DEBUG,
253 "Client wants to seed %" PRIX32 " peers:\n",
255 for (i = 0 ; i < n ; i++)
256 LOG (GNUNET_ERROR_TYPE_DEBUG,
259 GNUNET_i2s (&ids[i]));
261 /* The actual size the message occupies */
262 size_needed = sizeof (struct GNUNET_RPS_CS_SeedMessage) +
263 n * sizeof (struct GNUNET_PeerIdentity);
264 /* The number of peers that fits in one message together with
265 * the respective header */
266 num_peers_max = (GNUNET_SERVER_MAX_MESSAGE_SIZE -
267 sizeof (struct GNUNET_RPS_CS_SeedMessage)) /
268 sizeof (struct GNUNET_PeerIdentity);
269 tmp_peer_pointer = ids;
271 while (GNUNET_SERVER_MAX_MESSAGE_SIZE < size_needed)
273 ev = GNUNET_MQ_msg_extra (msg, num_peers_max * sizeof (struct GNUNET_PeerIdentity),
274 GNUNET_MESSAGE_TYPE_RPS_CS_SEED);
275 msg->num_peers = htonl (num_peers_max);
276 memcpy (&msg[1], tmp_peer_pointer, num_peers_max * sizeof (struct GNUNET_PeerIdentity));
277 GNUNET_MQ_send (h->mq, ev);
280 size_needed = sizeof (struct GNUNET_RPS_CS_SeedMessage) +
281 n * sizeof (struct GNUNET_PeerIdentity);
282 /* Set pointer to beginning of next block of num_peers_max peers */
283 tmp_peer_pointer = &ids[num_peers_max];
286 ev = GNUNET_MQ_msg_extra (msg, n * sizeof (struct GNUNET_PeerIdentity),
287 GNUNET_MESSAGE_TYPE_RPS_CS_SEED);
288 msg->num_peers = htonl (n);
289 memcpy (&msg[1], tmp_peer_pointer, n * sizeof (struct GNUNET_PeerIdentity));
291 GNUNET_MQ_send (h->mq, ev);
295 #ifdef ENABLE_MALICIOUS
297 * Turn RPS service to act malicious.
299 * @param h handle to the rps service
300 * @param type which type of malicious peer to turn to.
301 * 0 Don't act malicious at all
302 * 1 Try to maximise representation
303 * 2 Try to partition the network
304 * (isolate one peer from the rest)
305 * @param n number of @a ids
306 * @param ids the ids of the malicious peers
307 * if @type is 2 the last id is the id of the
308 * peer to be isolated from the rest
311 GNUNET_RPS_act_malicious (struct GNUNET_RPS_Handle *h,
314 const struct GNUNET_PeerIdentity *ids)
316 uint32_t size_needed;
317 uint32_t num_peers_max;
318 const struct GNUNET_PeerIdentity *tmp_peer_pointer;
319 struct GNUNET_MQ_Envelope *ev;
320 struct GNUNET_RPS_CS_ActMaliciousMessage *msg;
324 LOG (GNUNET_ERROR_TYPE_DEBUG,
325 "Client turns malicious with %" PRIX32 " other peers:\n",
327 for (i = 0 ; i < num_peers ; i++)
328 LOG (GNUNET_ERROR_TYPE_DEBUG,
331 GNUNET_i2s (&ids[i]));
333 /* The actual size the message occupies */
334 size_needed = sizeof (struct GNUNET_RPS_CS_SeedMessage) +
335 num_peers * sizeof (struct GNUNET_PeerIdentity);
336 /* The number of peers that fit in one message together with
337 * the respective header */
338 num_peers_max = (GNUNET_SERVER_MAX_MESSAGE_SIZE -
339 sizeof (struct GNUNET_RPS_CS_SeedMessage)) /
340 sizeof (struct GNUNET_PeerIdentity);
341 tmp_peer_pointer = ids;
343 while (GNUNET_SERVER_MAX_MESSAGE_SIZE < size_needed)
345 ev = GNUNET_MQ_msg_extra (msg,
346 num_peers_max * sizeof (struct GNUNET_PeerIdentity),
347 GNUNET_MESSAGE_TYPE_RPS_ACT_MALICIOUS);
348 msg->type = htonl (type);
349 msg->num_peers = htonl (num_peers_max);
350 memcpy (&msg[1], tmp_peer_pointer, num_peers_max * sizeof (struct GNUNET_PeerIdentity));
351 GNUNET_MQ_send (h->mq, ev);
353 num_peers -= num_peers_max;
354 size_needed = sizeof (struct GNUNET_RPS_CS_SeedMessage) +
355 num_peers * sizeof (struct GNUNET_PeerIdentity);
356 /* Set pointer to beginning of next block of num_peers_max peers */
357 tmp_peer_pointer = &ids[num_peers_max];
360 ev = GNUNET_MQ_msg_extra (msg,
361 num_peers * sizeof (struct GNUNET_PeerIdentity),
362 GNUNET_MESSAGE_TYPE_RPS_ACT_MALICIOUS);
363 msg->type = htonl (type);
364 msg->num_peers = htonl (num_peers);
365 memcpy (&msg[1], tmp_peer_pointer, num_peers * sizeof (struct GNUNET_PeerIdentity));
367 GNUNET_MQ_send (h->mq, ev);
369 #endif /* ENABLE_MALICIOUS */
373 * Cancle an issued request.
375 * @param rh request handle of request to cancle
378 GNUNET_RPS_request_cancel (struct GNUNET_RPS_Request_Handle *rh)
385 * Disconnect from the rps service
387 * @param h the handle to the rps service
390 GNUNET_RPS_disconnect (struct GNUNET_RPS_Handle *h)
393 GNUNET_CLIENT_disconnect (h->conn);
397 /* end of rps_api.c */