/*
This file is part of GNUnet.
- Copyright (C) 2009-2015 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2009-2015 GNUnet e.V.
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
*/
/**
* @file dht/gnunet-service-wdht_neighbours.c
* @brief GNUnet DHT service's finger and friend table management code
* @author Supriti Singh
+ * @author Christian Grothoff
+ * @author Arthur Dewarumez
+ *
+ * TODO:
+ * - initiate finding of successors
*/
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet-service-wdht_datacache.h"
#include "gnunet-service-wdht_neighbours.h"
#include "gnunet-service-wdht_nse.h"
-#include <fenv.h>
-#include <stdlib.h>
-#include <string.h>
#include "dht.h"
#define DEBUG(...) \
*/
uint32_t reserved GNUNET_PACKED;
- /**
- * Unique (random) identifier this peer will use to
- * identify the finger (in future messages).
- */
- struct GNUNET_HashCode trail_id;
-
/**
* Key for which we would like close values returned.
* identify the finger (in future messages).
* possibly initiate cleanup.
*
* @param cls NULL
- * @param tc unused
*/
static void
-trail_timeout_callback (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+trail_timeout_callback (void *cls)
{
struct Trail *trail;
struct GNUNET_TIME_Relative left;
* Initiate a random walk.
*
* @param cls NULL
- * @param tc unused
*/
static void
-do_random_walk (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+do_random_walk (void *cls)
{
static unsigned int walk_layer;
struct FriendInfo *friend;
/**
- * Handle a `struct RandomWalkResponseMessage` from a GNUNET_MESSAGE_TYPE_WDHT_RANDOM_WALK_RESPONSE
- * message.
+ * Handle a `struct RandomWalkResponseMessage`.
*
* @param cls closure (NULL)
* @param peer sender identity
const struct GNUNET_MessageHeader *message)
{
const struct RandomWalkResponseMessage *rwrm;
+ struct Trail *trail;
+ struct FriendInfo *pred;
+ struct FingerTable *ft;
+ struct Finger *finger;
rwrm = (const struct RandomWalkResponseMessage *) message;
+ trail = GNUNET_CONTAINER_multihashmap_get (trail_map,
+ &rwrm->trail_id);
+ if (NULL == trail)
+ {
+ /* TODO: log/statistics: we didn't find the trail (can happen) */
+ return GNUNET_OK;
+ }
+ if (NULL != (pred = trail->pred))
+ {
+ /* We are not the first hop, keep forwarding */
+ struct GNUNET_MQ_Envelope *env;
+ struct RandomWalkResponseMessage *rwrm2;
+
+ env = GNUNET_MQ_msg (rwrm2,
+ GNUNET_MESSAGE_TYPE_WDHT_RANDOM_WALK_RESPONSE);
+ rwrm2->reserved = htonl (0);
+ rwrm2->location = rwrm->location;
+ rwrm2->trail_id = trail->pred_id;
+ GNUNET_MQ_send (pred->mq,
+ env);
+ return GNUNET_OK;
+ }
+ /* We are the first hop, complete finger */
+ if (NULL == (ft = trail->ft))
+ {
+ /* Eh, why did we create the trail if we have no FT? */
+ GNUNET_break (0);
+ delete_trail (trail,
+ GNUNET_NO,
+ GNUNET_YES);
+ return GNUNET_OK;
+ }
+ if (NULL == (finger = ft->fingers[trail->finger_off]))
+ {
+ /* Eh, finger got deleted, but why not the trail as well? */
+ GNUNET_break (0);
+ delete_trail (trail,
+ GNUNET_NO,
+ GNUNET_YES);
+ return GNUNET_OK;
+ }
+
+
// 1) lookup trail => find Finger entry => fill in 'destination' and mark valid, move to end of sorted array,
//mark unsorted, update links from 'trails'
/*
{
const struct FindSuccessorMessage *fsm;
+ /* We do not expect to track trails for the forward-direction
+ of successor finding... */
+ GNUNET_break_op (0 == trail_path_length);
fsm = (const struct FindSuccessorMessage *) message;
- // locate trail (for sending reply), if not exists, fail nicely.
- // otherwise, go to datacache and return 'top k' elements closest to 'key'
- // as "PUT" messages via the trail (need to extend DB API!)
-#if 0
GDS_DATACACHE_get_successors (trail_id,
- key);
-#endif
+ &fsm->key);
return GNUNET_OK;
}
#if 0
GDS_DATACACHE_handle_put (expiration_time,
key,
- path_length, path,
+ combined_path_length, combined_path,
block_type,
data_size,
data);
GDS_CLIENTS_process_put (options,
block_type,
0, 0,
- path_length, path,
+ combined_path_length, combined_path,
expiration_time,
key,
data,
}
-
-
/**
* Handler for a message we received along some trail.
*
sizeof (struct FindSuccessorMessage) },
{ &handle_dht_p2p_peer_get, NULL,
GNUNET_MESSAGE_TYPE_WDHT_GET,
- sizeof (struct FindSuccessorMessage) },
+ 0 },
{ &handle_dht_p2p_peer_get_result, NULL,
GNUNET_MESSAGE_TYPE_WDHT_GET_RESULT,
0 },
/**
* Initialize neighbours subsystem.
+ *
* @return #GNUNET_OK on success, #GNUNET_SYSERR on error
*/
int
projects / oweals / gnunet.git / blobdiff