GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 2, or (at your
+ by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
* @brief gnunet anonymity protocol implementation
* @author Christian Grothoff
*
- * FIXME:
- * - TTL/priority calculations are absent!
* TODO:
- * - have non-zero preference / priority for requests we initiate!
- * - implement hot-path routing decision procedure
- * - implement: bound_priority, test_load_too_high
- * - statistics
+ * - collect traffic data for anonymity levels > 1
+ * - implement transmission restrictions for anonymity level > 1
+ * - more statistics
*/
#include "platform.h"
#include <float.h>
#include "gnunet_constants.h"
#include "gnunet_core_service.h"
+#include "gnunet_dht_service.h"
#include "gnunet_datastore_service.h"
+#include "gnunet_load_lib.h"
#include "gnunet_peer_lib.h"
#include "gnunet_protocols.h"
#include "gnunet_signatures.h"
#include "gnunet_statistics_service.h"
+#include "gnunet_transport_service.h"
#include "gnunet_util_lib.h"
#include "gnunet-service-fs_indexing.h"
#include "fs.h"
#define DEBUG_FS GNUNET_NO
/**
- * Maximum number of outgoing messages we queue per peer.
- * FIXME: make configurable?
+ * Should we introduce random latency in processing? Required for proper
+ * implementation of GAP, but can be disabled for performance evaluation of
+ * the basic routing algorithm.
+ *
+ * Note that with delays enabled, performance can be significantly lower
+ * (several orders of magnitude in 2-peer test runs); if you want to
+ * measure throughput of other components, set this to NO. Also, you
+ * might want to consider changing 'RETRY_PROBABILITY_INV' to 1 for
+ * a rather wasteful mode of operation (that might still get the highest
+ * throughput overall).
+ *
+ * Performance measurements (for 50 MB file, 2 peers):
+ *
+ * - Without delays: 3300 kb/s
+ * - With delays: 101 kb/s
+ */
+#define SUPPORT_DELAYS GNUNET_NO
+
+/**
+ * Size for the hash map for DHT requests from the FS
+ * service. Should be about the number of concurrent
+ * DHT requests we plan to make.
+ */
+#define FS_DHT_HT_SIZE 1024
+
+/**
+ * At what frequency should our datastore load decrease
+ * automatically (since if we don't use it, clearly the
+ * load must be going down).
+ */
+#define DATASTORE_LOAD_AUTODECLINE GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 250)
+
+/**
+ * How often do we flush trust values to disk?
+ */
+#define TRUST_FLUSH_FREQ GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 5)
+
+/**
+ * How quickly do we age cover traffic? At the given
+ * time interval, remaining cover traffic counters are
+ * decremented by 1/16th.
+ */
+#define COVER_AGE_FREQUENCY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 5)
+
+/**
+ * How often do we at most PUT content into the DHT?
*/
-#define MAX_QUEUE_PER_PEER 16
+#define MAX_DHT_PUT_FREQ GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 5)
/**
* Inverse of the probability that we will submit the same query
* repeatedly recently, the probability is multiplied by the inverse
* of this number each time. Note that we only try about every TTL_DECREMENT/2
* plus MAX_CORK_DELAY (so roughly every 3.5s).
+ *
+ * Note that this factor is a key influence to performance in small
+ * networks (especially test networks of 2 peers) because if there is
+ * only a single peer with the data, this value will determine how
+ * soon we might re-try. For example, a value of 3 can result in
+ * 1.7 MB/s transfer rates for a 10 MB file when a value of 1 would
+ * give us 5 MB/s. OTOH, obviously re-trying the same peer can be
+ * rather inefficient in larger networks, hence picking 1 is in
+ * general not the best choice.
+ *
+ * Performance measurements (for 50 MB file, 2 peers, no delays):
+ *
+ * - 1: 3300 kb/s (consistently)
+ * - 3: 2046 kb/s, 754 kb/s, 3490 kb/s
+ * - 5: 759 kb/s, 968 kb/s, 1160 kb/s
+ *
+ * Note that this does NOT mean that the value should be 1 since
+ * a 2-peer network is far from representative here (and this fails
+ * to take into consideration bandwidth wasted by repeatedly
+ * sending queries to peers that don't have the content). Also,
+ * it is expected that higher values lead to more inconsistent
+ * measurements since this only affects lost messages towards the
+ * end of the download.
+ *
+ * Finally, we should probably consider changing this and making
+ * it dependent on the number of connected peers or a related
+ * metric (bad magic constants...).
*/
-#define RETRY_PROBABILITY_INV 3
+#define RETRY_PROBABILITY_INV 1
/**
* What is the maximum delay for a P2P FS message (in our interaction
*/
#define MAX_TRANSMIT_DELAY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 45)
-
-
/**
- * Maximum number of requests (from other peers) that we're
- * willing to have pending at any given point in time.
- * FIXME: set from configuration.
+ * Maximum number of requests (from other peers, overall) that we're
+ * willing to have pending at any given point in time. Can be changed
+ * via the configuration file (32k is just the default).
*/
-static uint64_t max_pending_requests = (32 * 1024);
+static unsigned long long max_pending_requests = (32 * 1024);
/**
*/
struct PendingMessage;
-/**
- * Our connection to the datastore.
- */
-static struct GNUNET_DATASTORE_Handle *dsh;
-
-
/**
* Function called upon completion of a transmission.
*
*/
void *cont_cls;
+ /**
+ * Do not transmit this pending message until this deadline.
+ */
+ struct GNUNET_TIME_Absolute delay_until;
+
/**
* Size of the reply; actual reply message follows
* at the end of this struct.
*/
struct GNUNET_TIME_Relative avg_delay;
+ /**
+ * Point in time until which this peer does not want us to migrate content
+ * to it.
+ */
+ struct GNUNET_TIME_Absolute migration_blocked;
+
+ /**
+ * Time until when we blocked this peer from migrating
+ * data to us.
+ */
+ struct GNUNET_TIME_Absolute last_migration_block;
+
+ /**
+ * Transmission times for the last MAX_QUEUE_PER_PEER
+ * requests for this peer. Used as a ring buffer, current
+ * offset is stored in 'last_request_times_off'. If the
+ * oldest entry is more recent than the 'avg_delay', we should
+ * not send any more requests right now.
+ */
+ struct GNUNET_TIME_Absolute last_request_times[MAX_QUEUE_PER_PEER];
+
/**
* Handle for an active request for transmission to this
* peer, or NULL.
*/
struct PendingMessage *pending_messages_tail;
+ /**
+ * How long does it typically take for us to transmit a message
+ * to this peer? (delay between the request being issued and
+ * the callback being invoked).
+ */
+ struct GNUNET_LOAD_Value *transmission_delay;
+
+ /**
+ * Context of our GNUNET_CORE_peer_change_preference call (or NULL).
+ */
+ struct GNUNET_CORE_InformationRequestContext *irc;
+
+ /**
+ * Request for which 'irc' is currently active (or NULL).
+ */
+ struct PendingRequest *pr;
+
+ /**
+ * Time when the last transmission request was issued.
+ */
+ struct GNUNET_TIME_Absolute last_transmission_request_start;
+
+ /**
+ * ID of delay task for scheduling transmission.
+ */
+ GNUNET_SCHEDULER_TaskIdentifier delayed_transmission_request_task;
+
/**
* Average priority of successful replies. Calculated
* as a moving average: new_avg = ((n-1)*last_avg+curr_prio) / n
/**
* Increase in traffic preference still to be submitted
- * to the core service for this peer. FIXME: double or 'uint64_t'?
+ * to the core service for this peer.
+ */
+ uint64_t inc_preference;
+
+ /**
+ * Trust rating for this peer
+ */
+ uint32_t trust;
+
+ /**
+ * Trust rating for this peer on disk.
*/
- double inc_preference;
+ uint32_t disk_trust;
/**
* The peer's identity.
*/
unsigned int last_client_replies_woff;
+ /**
+ * Current offset into 'last_request_times' ring buffer.
+ */
+ unsigned int last_request_times_off;
+
};
};
+/**
+ * Information about a peer that we have forwarded this
+ * request to already.
+ */
+struct UsedTargetEntry
+{
+ /**
+ * What was the last time we have transmitted this request to this
+ * peer?
+ */
+ struct GNUNET_TIME_Absolute last_request_time;
+
+ /**
+ * How often have we transmitted this request to this peer?
+ */
+ unsigned int num_requests;
+
+ /**
+ * PID of the target peer.
+ */
+ GNUNET_PEER_Id pid;
+
+};
+
+
/**
* Doubly-linked list of messages we are performing
* due to a pending request.
*/
struct GNUNET_CONTAINER_BloomFilter *bf;
+ /**
+ * Reference to DHT get operation for this request (or NULL).
+ */
+ struct GNUNET_DHT_GetHandle *dht_get;
+
/**
* Context of our GNUNET_CORE_peer_change_preference call.
*/
- struct GNUNET_CORE_InformationRequestContext *irc;
+ struct ConnectedPeer *pirc;
/**
* Hash code of all replies that we have seen so far (only valid
* (Interned) Peer identifiers of peers that have already
* received our query for this content.
*/
- GNUNET_PEER_Id *used_pids;
+ struct UsedTargetEntry *used_targets;
/**
* Our entry in the queue (non-NULL while we wait for our
struct GNUNET_DATASTORE_QueueEntry *qe;
/**
-
* Size of the 'bf' (in bytes).
*/
size_t bf_size;
uint32_t anonymity_level;
/**
- * How many entries in "used_pids" are actually valid?
+ * How many entries in "used_targets" are actually valid?
*/
- unsigned int used_pids_off;
+ unsigned int used_targets_off;
/**
- * How long is the "used_pids" array?
+ * How long is the "used_targets" array?
*/
- unsigned int used_pids_size;
+ unsigned int used_targets_size;
/**
* Number of results found for this request.
/**
* Remove this request after transmission of the current response.
*/
- int16_t do_remove;
+ int8_t do_remove;
+
+ /**
+ * GNUNET_YES if we should not forward this request to other peers.
+ */
+ int8_t local_only;
/**
* GNUNET_YES if we should not forward this request to other peers.
*/
- int16_t local_only;
+ int8_t forward_only;
};
/**
- * Our scheduler.
+ * Our connection to the datastore.
+ */
+static struct GNUNET_DATASTORE_Handle *dsh;
+
+/**
+ * Our block context.
+ */
+static struct GNUNET_BLOCK_Context *block_ctx;
+
+/**
+ * Our block configuration.
*/
-static struct GNUNET_SCHEDULER_Handle *sched;
+static struct GNUNET_CONFIGURATION_Handle *block_cfg;
/**
* Our configuration.
*/
static struct GNUNET_DATASTORE_QueueEntry *mig_qe;
+/**
+ * Request to datastore for DHT PUTs (or NULL).
+ */
+static struct GNUNET_DATASTORE_QueueEntry *dht_qe;
+
+/**
+ * Type we will request for the next DHT PUT round from the datastore.
+ */
+static enum GNUNET_BLOCK_Type dht_put_type = GNUNET_BLOCK_TYPE_FS_KBLOCK;
+
+/**
+ * Where do we store trust information?
+ */
+static char *trustDirectory;
+
/**
* ID of task that collects blocks for migration.
*/
static GNUNET_SCHEDULER_TaskIdentifier mig_task;
+/**
+ * ID of task that collects blocks for DHT PUTs.
+ */
+static GNUNET_SCHEDULER_TaskIdentifier dht_task;
+
/**
* What is the maximum frequency at which we are allowed to
* poll the datastore for migration content?
*/
static struct GNUNET_TIME_Relative min_migration_delay;
+/**
+ * Handle for DHT operations.
+ */
+static struct GNUNET_DHT_Handle *dht_handle;
+
/**
* Size of the doubly-linked list of migration blocks.
*/
/**
* Are we allowed to migrate content to this peer.
*/
-static int active_migration;
+static int active_to_migration;
+
+/**
+ * Are we allowed to push out content from this peer.
+ */
+static int active_from_migration;
+
+/**
+ * How many entires with zero anonymity do we currently estimate
+ * to have in the database?
+ */
+static unsigned int zero_anonymity_count_estimate;
+
+/**
+ * Typical priorities we're seeing from other peers right now. Since
+ * most priorities will be zero, this value is the weighted average of
+ * non-zero priorities seen "recently". In order to ensure that new
+ * values do not dramatically change the ratio, values are first
+ * "capped" to a reasonable range (+N of the current value) and then
+ * averaged into the existing value by a ratio of 1:N. Hence
+ * receiving the largest possible priority can still only raise our
+ * "current_priorities" by at most 1.
+ */
+static double current_priorities;
+
+/**
+ * Datastore 'GET' load tracking.
+ */
+static struct GNUNET_LOAD_Value *datastore_get_load;
+
+/**
+ * Datastore 'PUT' load tracking.
+ */
+static struct GNUNET_LOAD_Value *datastore_put_load;
+
+/**
+ * How long do requests typically stay in the routing table?
+ */
+static struct GNUNET_LOAD_Value *rt_entry_lifetime;
+
+/**
+ * How many query messages have we received 'recently' that
+ * have not yet been claimed as cover traffic?
+ */
+static unsigned int cover_query_count;
+
+/**
+ * How many content messages have we received 'recently' that
+ * have not yet been claimed as cover traffic?
+ */
+static unsigned int cover_content_count;
+
+/**
+ * ID of our task that we use to age the cover counters.
+ */
+static GNUNET_SCHEDULER_TaskIdentifier cover_age_task;
+
+static void
+age_cover_counters (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ cover_content_count = (cover_content_count * 15) / 16;
+ cover_query_count = (cover_query_count * 15) / 16;
+ cover_age_task = GNUNET_SCHEDULER_add_delayed (COVER_AGE_FREQUENCY,
+ &age_cover_counters,
+ NULL);
+}
+
+/**
+ * We've just now completed a datastore request. Update our
+ * datastore load calculations.
+ *
+ * @param start time when the datastore request was issued
+ */
+static void
+update_datastore_delays (struct GNUNET_TIME_Absolute start)
+{
+ struct GNUNET_TIME_Relative delay;
+
+ delay = GNUNET_TIME_absolute_get_duration (start);
+ GNUNET_LOAD_update (datastore_get_load,
+ delay.rel_value);
+}
+
+
+/**
+ * Get the filename under which we would store the GNUNET_HELLO_Message
+ * for the given host and protocol.
+ * @return filename of the form DIRECTORY/HOSTID
+ */
+static char *
+get_trust_filename (const struct GNUNET_PeerIdentity *id)
+{
+ struct GNUNET_CRYPTO_HashAsciiEncoded fil;
+ char *fn;
+
+ GNUNET_CRYPTO_hash_to_enc (&id->hashPubKey, &fil);
+ GNUNET_asprintf (&fn, "%s%s%s", trustDirectory, DIR_SEPARATOR_STR, &fil);
+ return fn;
+}
+
/**
/* ******************* clean up functions ************************ */
-
/**
* Delete the given migration block.
*
* targets for (or NULL for none)
* @param key ID of the peer
* @param value 'struct ConnectedPeer' of the peer
- * @return GNUNET_YES (always continue iteration)2
+ * @return GNUNET_YES (always continue iteration)
*/
static int
consider_migration (void *cls,
unsigned int repl;
/* consider 'cp' as a migration target for mb */
+ if (GNUNET_TIME_absolute_get_remaining (cp->migration_blocked).rel_value > 0)
+ return GNUNET_YES; /* peer has requested no migration! */
if (mb != NULL)
{
GNUNET_PEER_resolve (cp->pid,
}
/* consider scheduling transmission to cp for content migration */
- if (cp->cth != NULL)
+ if (cp->cth != NULL)
return GNUNET_YES;
msize = 0;
pos = mig_head;
}
if (msize == 0)
return GNUNET_YES; /* no content available */
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Trying to migrate at least %u bytes to peer `%s'\n",
+ msize,
+ GNUNET_h2s (key));
+#endif
+ if (cp->delayed_transmission_request_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel (cp->delayed_transmission_request_task);
+ cp->delayed_transmission_request_task = GNUNET_SCHEDULER_NO_TASK;
+ }
cp->cth
= GNUNET_CORE_notify_transmit_ready (core,
0, GNUNET_TIME_UNIT_FOREVER_REL,
const struct GNUNET_SCHEDULER_TaskContext *tc);
+
+
+/**
+ * Task that is run periodically to obtain blocks for DHT PUTs.
+ *
+ * @param cls type of blocks to gather
+ * @param tc scheduler context (unused)
+ */
+static void
+gather_dht_put_blocks (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc);
+
+
/**
* If the migration task is not currently running, consider
* (re)scheduling it with the appropriate delay.
{
struct GNUNET_TIME_Relative delay;
+ if (dsh == NULL)
+ return;
if (mig_qe != NULL)
return;
if (mig_task != GNUNET_SCHEDULER_NO_TASK)
return;
delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS,
mig_size);
- delay = GNUNET_TIME_relative_divide (GNUNET_TIME_UNIT_SECONDS,
+ delay = GNUNET_TIME_relative_divide (delay,
MAX_MIGRATION_QUEUE);
delay = GNUNET_TIME_relative_max (delay,
min_migration_delay);
- mig_task = GNUNET_SCHEDULER_add_delayed (sched,
- delay,
+ mig_task = GNUNET_SCHEDULER_add_delayed (delay,
&gather_migration_blocks,
NULL);
}
+/**
+ * If the DHT PUT gathering task is not currently running, consider
+ * (re)scheduling it with the appropriate delay.
+ */
+static void
+consider_dht_put_gathering (void *cls)
+{
+ struct GNUNET_TIME_Relative delay;
+
+ if (dsh == NULL)
+ return;
+ if (dht_qe != NULL)
+ return;
+ if (dht_task != GNUNET_SCHEDULER_NO_TASK)
+ return;
+ if (zero_anonymity_count_estimate > 0)
+ {
+ delay = GNUNET_TIME_relative_divide (GNUNET_DHT_DEFAULT_REPUBLISH_FREQUENCY,
+ zero_anonymity_count_estimate);
+ delay = GNUNET_TIME_relative_min (delay,
+ MAX_DHT_PUT_FREQ);
+ }
+ else
+ {
+ /* if we have NO zero-anonymity content yet, wait 5 minutes for some to
+ (hopefully) appear */
+ delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 5);
+ }
+ dht_task = GNUNET_SCHEDULER_add_delayed (delay,
+ &gather_dht_put_blocks,
+ cls);
+}
+
+
/**
* Process content offered for migration.
*
static void
process_migration_content (void *cls,
const GNUNET_HashCode * key,
- uint32_t size,
+ size_t size,
const void *data,
enum GNUNET_BLOCK_Type type,
uint32_t priority,
consider_migration_gathering ();
return;
}
- if (type == GNUNET_BLOCK_TYPE_ONDEMAND)
+ if (type == GNUNET_BLOCK_TYPE_FS_ONDEMAND)
{
if (GNUNET_OK !=
GNUNET_FS_handle_on_demand_block (key, size, data,
expiration, uid,
&process_migration_content,
NULL))
- GNUNET_DATASTORE_get_next (dsh, GNUNET_YES);
+ {
+ GNUNET_DATASTORE_get_next (dsh, GNUNET_YES);
+ }
return;
}
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Retrieved block `%s' of type %u for migration\n",
+ GNUNET_h2s (key),
+ type);
+#endif
mb = GNUNET_malloc (sizeof (struct MigrationReadyBlock) + size);
mb->query = *key;
mb->expiration = expiration;
}
+/**
+ * Function called upon completion of the DHT PUT operation.
+ */
+static void
+dht_put_continuation (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ GNUNET_DATASTORE_get_next (dsh, GNUNET_YES);
+}
+
+
+/**
+ * Store content in DHT.
+ *
+ * @param cls closure
+ * @param key key for the content
+ * @param size number of bytes in data
+ * @param data content stored
+ * @param type type of the content
+ * @param priority priority of the content
+ * @param anonymity anonymity-level for the content
+ * @param expiration expiration time for the content
+ * @param uid unique identifier for the datum;
+ * maybe 0 if no unique identifier is available
+ */
+static void
+process_dht_put_content (void *cls,
+ const GNUNET_HashCode * key,
+ size_t size,
+ const void *data,
+ enum GNUNET_BLOCK_Type type,
+ uint32_t priority,
+ uint32_t anonymity,
+ struct GNUNET_TIME_Absolute
+ expiration, uint64_t uid)
+{
+ static unsigned int counter;
+ static GNUNET_HashCode last_vhash;
+ static GNUNET_HashCode vhash;
+
+ if (key == NULL)
+ {
+ dht_qe = NULL;
+ consider_dht_put_gathering (cls);
+ return;
+ }
+ /* slightly funky code to estimate the total number of values with zero
+ anonymity from the maximum observed length of a monotonically increasing
+ sequence of hashes over the contents */
+ GNUNET_CRYPTO_hash (data, size, &vhash);
+ if (GNUNET_CRYPTO_hash_cmp (&vhash, &last_vhash) <= 0)
+ {
+ if (zero_anonymity_count_estimate > 0)
+ zero_anonymity_count_estimate /= 2;
+ counter = 0;
+ }
+ last_vhash = vhash;
+ if (counter < 31)
+ counter++;
+ if (zero_anonymity_count_estimate < (1 << counter))
+ zero_anonymity_count_estimate = (1 << counter);
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Retrieved block `%s' of type %u for DHT PUT\n",
+ GNUNET_h2s (key),
+ type);
+#endif
+ GNUNET_DHT_put (dht_handle,
+ key,
+ DEFAULT_PUT_REPLICATION,
+ GNUNET_DHT_RO_NONE,
+ type,
+ size,
+ data,
+ expiration,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ &dht_put_continuation,
+ cls);
+}
+
+
/**
* Task that is run periodically to obtain blocks for content
* migration
const struct GNUNET_SCHEDULER_TaskContext *tc)
{
mig_task = GNUNET_SCHEDULER_NO_TASK;
- mig_qe = GNUNET_DATASTORE_get_random (dsh, 0, -1,
- GNUNET_TIME_UNIT_FOREVER_REL,
- &process_migration_content, NULL);
+ if (dsh != NULL)
+ {
+ mig_qe = GNUNET_DATASTORE_get_random (dsh, 0, UINT_MAX,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ &process_migration_content, NULL);
+ GNUNET_assert (mig_qe != NULL);
+ }
}
/**
- * We're done with a particular message list entry.
- * Free all associated resources.
+ * Task that is run periodically to obtain blocks for DHT PUTs.
*
- * @param pml entry to destroy
+ * @param cls type of blocks to gather
+ * @param tc scheduler context (unused)
*/
static void
-destroy_pending_message_list_entry (struct PendingMessageList *pml)
+gather_dht_put_blocks (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- GNUNET_CONTAINER_DLL_remove (pml->req->pending_head,
- pml->req->pending_tail,
- pml);
- GNUNET_CONTAINER_DLL_remove (pml->target->pending_messages_head,
- pml->target->pending_messages_tail,
+ dht_task = GNUNET_SCHEDULER_NO_TASK;
+ if (dsh != NULL)
+ {
+ if (dht_put_type == GNUNET_BLOCK_TYPE_FS_ONDEMAND)
+ dht_put_type = GNUNET_BLOCK_TYPE_FS_KBLOCK;
+ dht_qe = GNUNET_DATASTORE_get_zero_anonymity (dsh, 0, UINT_MAX,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ dht_put_type++,
+ &process_dht_put_content, NULL);
+ GNUNET_assert (dht_qe != NULL);
+ }
+}
+
+
+/**
+ * We're done with a particular message list entry.
+ * Free all associated resources.
+ *
+ * @param pml entry to destroy
+ */
+static void
+destroy_pending_message_list_entry (struct PendingMessageList *pml)
+{
+ GNUNET_CONTAINER_DLL_remove (pml->req->pending_head,
+ pml->req->pending_tail,
+ pml);
+ GNUNET_CONTAINER_DLL_remove (pml->target->pending_messages_head,
+ pml->target->pending_messages_tail,
pml->pm);
pml->target->pending_requests--;
GNUNET_free (pml->pm);
TransmissionContinuation cont;
void *cont_cls;
- GNUNET_assert (pml->pm == pm);
- GNUNET_assert ( (tpid == 0) || (tpid == pml->target->pid) );
cont = pm->cont;
cont_cls = pm->cont_cls;
- destroy_pending_message_list_entry (pml);
- cont (cont_cls, tpid);
+ if (pml != NULL)
+ {
+ GNUNET_assert (pml->pm == pm);
+ GNUNET_assert ( (tpid == 0) || (tpid == pml->target->pid) );
+ destroy_pending_message_list_entry (pml);
+ }
+ else
+ {
+ GNUNET_free (pm);
+ }
+ if (cont != NULL)
+ cont (cont_cls, tpid);
}
destroy_pending_request (struct PendingRequest *pr)
{
struct GNUNET_PeerIdentity pid;
+ unsigned int i;
if (pr->hnode != NULL)
{
-1,
GNUNET_NO);
}
- /* might have already been removed from map in 'process_reply' (if
- there was a unique reply) or never inserted if it was a
- duplicate; hence ignore the return value here */
- (void) GNUNET_CONTAINER_multihashmap_remove (query_request_map,
- &pr->query,
- pr);
+ if (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap_remove (query_request_map,
+ &pr->query,
+ pr))
+ {
+ GNUNET_LOAD_update (rt_entry_lifetime,
+ GNUNET_TIME_absolute_get_duration (pr->start_time).rel_value);
+ }
if (pr->qe != NULL)
{
GNUNET_DATASTORE_cancel (pr->qe);
pr->qe = NULL;
}
+ if (pr->dht_get != NULL)
+ {
+ GNUNET_DHT_get_stop (pr->dht_get);
+ pr->dht_get = NULL;
+ }
if (pr->client_request_list != NULL)
{
GNUNET_CONTAINER_DLL_remove (pr->client_request_list->client_list->rl_head,
GNUNET_CONTAINER_bloomfilter_free (pr->bf);
pr->bf = NULL;
}
- if (pr->irc != NULL)
+ if (pr->pirc != NULL)
{
- GNUNET_CORE_peer_change_preference_cancel (pr->irc);
- pr->irc = NULL;
+ GNUNET_CORE_peer_change_preference_cancel (pr->pirc->irc);
+ pr->pirc->irc = NULL;
+ pr->pirc = NULL;
}
if (pr->replies_seen != NULL)
{
}
if (pr->task != GNUNET_SCHEDULER_NO_TASK)
{
- GNUNET_SCHEDULER_cancel (sched,
- pr->task);
+ GNUNET_SCHEDULER_cancel (pr->task);
pr->task = GNUNET_SCHEDULER_NO_TASK;
}
while (NULL != pr->pending_head)
destroy_pending_message_list_entry (pr->pending_head);
GNUNET_PEER_change_rc (pr->target_pid, -1);
- if (pr->used_pids != NULL)
+ if (pr->used_targets != NULL)
{
- GNUNET_PEER_decrement_rcs (pr->used_pids, pr->used_pids_off);
- GNUNET_free (pr->used_pids);
- pr->used_pids_off = 0;
- pr->used_pids_size = 0;
- pr->used_pids = NULL;
+ for (i=0;i<pr->used_targets_off;i++)
+ GNUNET_PEER_change_rc (pr->used_targets[i].pid, -1);
+ GNUNET_free (pr->used_targets);
+ pr->used_targets_off = 0;
+ pr->used_targets_size = 0;
+ pr->used_targets = NULL;
}
GNUNET_free (pr);
}
+/**
+ * Find latency information in 'atsi'.
+ *
+ * @param atsi performance data
+ * @return connection latency
+ */
+static struct GNUNET_TIME_Relative
+get_latency (const struct GNUNET_TRANSPORT_ATS_Information *atsi)
+{
+ while ( (ntohl (atsi->type) != GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR) &&
+ (ntohl (atsi->type) != GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY) )
+ atsi++;
+ if (ntohl (atsi->type) == GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR)
+ {
+ GNUNET_break (0);
+ /* how can we not have latency data? */
+ return GNUNET_TIME_UNIT_SECONDS;
+ }
+ return GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
+ ntohl (atsi->value));
+}
+
+
/**
* Method called whenever a given peer connects.
*
* @param cls closure, not used
* @param peer peer identity this notification is about
- * @param latency reported latency of the connection with 'other'
- * @param distance reported distance (DV) to 'other'
+ * @param atsi performance information
*/
static void
peer_connect_handler (void *cls,
const struct
GNUNET_PeerIdentity * peer,
- struct GNUNET_TIME_Relative latency,
- uint32_t distance)
+ const struct GNUNET_TRANSPORT_ATS_Information *atsi)
{
struct ConnectedPeer *cp;
struct MigrationReadyBlock *pos;
-
+ char *fn;
+ uint32_t trust;
+ struct GNUNET_TIME_Relative latency;
+
+ latency = get_latency (atsi);
+ cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
+ &peer->hashPubKey);
+ if (NULL != cp)
+ {
+ GNUNET_break (0);
+ return;
+ }
cp = GNUNET_malloc (sizeof (struct ConnectedPeer));
+ cp->transmission_delay = GNUNET_LOAD_value_init (latency);
cp->pid = GNUNET_PEER_intern (peer);
+
+ fn = get_trust_filename (peer);
+ if ((GNUNET_DISK_file_test (fn) == GNUNET_YES) &&
+ (sizeof (trust) == GNUNET_DISK_fn_read (fn, &trust, sizeof (trust))))
+ cp->disk_trust = cp->trust = ntohl (trust);
+ GNUNET_free (fn);
+
GNUNET_break (GNUNET_OK ==
GNUNET_CONTAINER_multihashmap_put (connected_peers,
&peer->hashPubKey,
}
+/**
+ * Method called whenever a given peer has a status change.
+ *
+ * @param cls closure
+ * @param peer peer identity this notification is about
+ * @param bandwidth_in available amount of inbound bandwidth
+ * @param bandwidth_out available amount of outbound bandwidth
+ * @param timeout absolute time when this peer will time out
+ * unless we see some further activity from it
+ * @param atsi status information
+ */
+static void
+peer_status_handler (void *cls,
+ const struct
+ GNUNET_PeerIdentity * peer,
+ struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
+ struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
+ struct GNUNET_TIME_Absolute timeout,
+ const struct GNUNET_TRANSPORT_ATS_Information *atsi)
+{
+ struct ConnectedPeer *cp;
+ struct GNUNET_TIME_Relative latency;
+
+ latency = get_latency (atsi);
+ cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
+ &peer->hashPubKey);
+ if (cp == NULL)
+ {
+ GNUNET_break (0);
+ return;
+ }
+ GNUNET_LOAD_value_set_decline (cp->transmission_delay,
+ latency);
+}
+
+
+
+/**
+ * Increase the host credit by a value.
+ *
+ * @param host which peer to change the trust value on
+ * @param value is the int value by which the
+ * host credit is to be increased or decreased
+ * @returns the actual change in trust (positive or negative)
+ */
+static int
+change_host_trust (struct ConnectedPeer *host, int value)
+{
+ if (value == 0)
+ return 0;
+ GNUNET_assert (host != NULL);
+ if (value > 0)
+ {
+ if (host->trust + value < host->trust)
+ {
+ value = UINT32_MAX - host->trust;
+ host->trust = UINT32_MAX;
+ }
+ else
+ host->trust += value;
+ }
+ else
+ {
+ if (host->trust < -value)
+ {
+ value = -host->trust;
+ host->trust = 0;
+ }
+ else
+ host->trust += value;
+ }
+ return value;
+}
+
+
+/**
+ * Write host-trust information to a file - flush the buffer entry!
+ */
+static int
+flush_trust (void *cls,
+ const GNUNET_HashCode *key,
+ void *value)
+{
+ struct ConnectedPeer *host = value;
+ char *fn;
+ uint32_t trust;
+ struct GNUNET_PeerIdentity pid;
+
+ if (host->trust == host->disk_trust)
+ return GNUNET_OK; /* unchanged */
+ GNUNET_PEER_resolve (host->pid,
+ &pid);
+ fn = get_trust_filename (&pid);
+ if (host->trust == 0)
+ {
+ if ((0 != UNLINK (fn)) && (errno != ENOENT))
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING |
+ GNUNET_ERROR_TYPE_BULK, "unlink", fn);
+ }
+ else
+ {
+ trust = htonl (host->trust);
+ if (sizeof(uint32_t) == GNUNET_DISK_fn_write (fn, &trust,
+ sizeof(uint32_t),
+ GNUNET_DISK_PERM_USER_READ | GNUNET_DISK_PERM_USER_WRITE
+ | GNUNET_DISK_PERM_GROUP_READ | GNUNET_DISK_PERM_OTHER_READ))
+ host->disk_trust = host->trust;
+ }
+ GNUNET_free (fn);
+ return GNUNET_OK;
+}
+
+/**
+ * Call this method periodically to scan data/hosts for new hosts.
+ */
+static void
+cron_flush_trust (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+
+ if (NULL == connected_peers)
+ return;
+ GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
+ &flush_trust,
+ NULL);
+ if (NULL == tc)
+ return;
+ if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
+ return;
+ GNUNET_SCHEDULER_add_delayed (TRUST_FLUSH_FREQ, &cron_flush_trust, NULL);
+}
+
/**
* Free (each) request made by the peer.
GNUNET_CONTAINER_multihashmap_remove (connected_peers,
&peer->hashPubKey,
cp));
+ if (cp->irc != NULL)
+ {
+ GNUNET_CORE_peer_change_preference_cancel (cp->irc);
+ cp->irc = NULL;
+ cp->pr->pirc = NULL;
+ cp->pr = NULL;
+ }
+
/* remove this peer from migration considerations; schedule
alternatives */
next = mig_head;
{
GNUNET_PEER_change_rc (pos->target_list[i], -1);
pos->target_list[i] = 0;
- if (pos->used_targets >= GNUNET_CONTAINER_multihashmap_size (connected_peers))
- {
- delete_migration_block (pos);
- consider_migration_gathering ();
- }
- GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
- &consider_migration,
- pos);
- break;
- }
+ }
+ }
+ if (pos->used_targets >= GNUNET_CONTAINER_multihashmap_size (connected_peers))
+ {
+ delete_migration_block (pos);
+ consider_migration_gathering ();
+ continue;
}
+ GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
+ &consider_migration,
+ pos);
}
-
GNUNET_PEER_change_rc (cp->pid, -1);
GNUNET_PEER_decrement_rcs (cp->last_p2p_replies, P2P_SUCCESS_LIST_SIZE);
if (NULL != cp->cth)
- GNUNET_CORE_notify_transmit_ready_cancel (cp->cth);
+ {
+ GNUNET_CORE_notify_transmit_ready_cancel (cp->cth);
+ cp->cth = NULL;
+ }
+ if (cp->delayed_transmission_request_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel (cp->delayed_transmission_request_task);
+ cp->delayed_transmission_request_task = GNUNET_SCHEDULER_NO_TASK;
+ }
while (NULL != (pm = cp->pending_messages_head))
destroy_pending_message (pm, 0 /* delivery failed */);
+ GNUNET_LOAD_value_free (cp->transmission_delay);
GNUNET_break (0 == cp->pending_requests);
GNUNET_free (cp);
}
GNUNET_DATASTORE_cancel (mig_qe);
mig_qe = NULL;
}
+ if (dht_qe != NULL)
+ {
+ GNUNET_DATASTORE_cancel (dht_qe);
+ dht_qe = NULL;
+ }
if (GNUNET_SCHEDULER_NO_TASK != mig_task)
{
- GNUNET_SCHEDULER_cancel (sched, mig_task);
+ GNUNET_SCHEDULER_cancel (mig_task);
mig_task = GNUNET_SCHEDULER_NO_TASK;
}
+ if (GNUNET_SCHEDULER_NO_TASK != dht_task)
+ {
+ GNUNET_SCHEDULER_cancel (dht_task);
+ dht_task = GNUNET_SCHEDULER_NO_TASK;
+ }
while (client_list != NULL)
handle_client_disconnect (NULL,
client_list->client);
+ cron_flush_trust (NULL, NULL);
GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
&clean_peer,
NULL);
GNUNET_break (0 == GNUNET_CONTAINER_multihashmap_size (query_request_map));
GNUNET_CONTAINER_multihashmap_destroy (query_request_map);
query_request_map = NULL;
+ GNUNET_LOAD_value_free (rt_entry_lifetime);
+ rt_entry_lifetime = NULL;
GNUNET_break (0 == GNUNET_CONTAINER_multihashmap_size (peer_request_map));
GNUNET_CONTAINER_multihashmap_destroy (peer_request_map);
peer_request_map = NULL;
GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
stats = NULL;
}
- GNUNET_DATASTORE_disconnect (dsh,
- GNUNET_NO);
+ if (dsh != NULL)
+ {
+ GNUNET_DATASTORE_disconnect (dsh,
+ GNUNET_NO);
+ dsh = NULL;
+ }
while (mig_head != NULL)
delete_migration_block (mig_head);
GNUNET_assert (0 == mig_size);
- dsh = NULL;
- sched = NULL;
+ GNUNET_DHT_disconnect (dht_handle);
+ dht_handle = NULL;
+ GNUNET_LOAD_value_free (datastore_get_load);
+ datastore_get_load = NULL;
+ GNUNET_LOAD_value_free (datastore_put_load);
+ datastore_put_load = NULL;
+ GNUNET_BLOCK_context_destroy (block_ctx);
+ block_ctx = NULL;
+ GNUNET_CONFIGURATION_destroy (block_cfg);
+ block_cfg = NULL;
cfg = NULL;
+ GNUNET_free_non_null (trustDirectory);
+ trustDirectory = NULL;
+ GNUNET_SCHEDULER_cancel (cover_age_task);
+ cover_age_task = GNUNET_SCHEDULER_NO_TASK;
}
/* ******************* Utility functions ******************** */
+/**
+ * We've had to delay a request for transmission to core, but now
+ * we should be ready. Run it.
+ *
+ * @param cls the 'struct ConnectedPeer' for which a request was delayed
+ * @param tc task context (unused)
+ */
+static void
+delayed_transmission_request (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct ConnectedPeer *cp = cls;
+ struct GNUNET_PeerIdentity pid;
+ struct PendingMessage *pm;
+
+ pm = cp->pending_messages_head;
+ cp->delayed_transmission_request_task = GNUNET_SCHEDULER_NO_TASK;
+ GNUNET_assert (cp->cth == NULL);
+ if (pm == NULL)
+ return;
+ GNUNET_PEER_resolve (cp->pid,
+ &pid);
+ cp->last_transmission_request_start = GNUNET_TIME_absolute_get ();
+ cp->cth = GNUNET_CORE_notify_transmit_ready (core,
+ pm->priority,
+ GNUNET_CONSTANTS_SERVICE_TIMEOUT,
+ &pid,
+ pm->msize,
+ &transmit_to_peer,
+ cp);
+}
+
+
/**
* Transmit messages by copying it to the target buffer
* "buf". "buf" will be NULL and "size" zero if the socket was closed
{
struct ConnectedPeer *cp = cls;
char *cbuf = buf;
- struct GNUNET_PeerIdentity pid;
struct PendingMessage *pm;
+ struct PendingMessage *next_pm;
+ struct GNUNET_TIME_Absolute now;
+ struct GNUNET_TIME_Relative min_delay;
struct MigrationReadyBlock *mb;
struct MigrationReadyBlock *next;
struct PutMessage migm;
size_t msize;
unsigned int i;
+ struct GNUNET_PeerIdentity pid;
cp->cth = NULL;
if (NULL == buf)
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Dropping message, core too busy.\n");
#endif
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Dropping message, core too busy.\n");
+ GNUNET_LOAD_update (cp->transmission_delay,
+ UINT64_MAX);
+
+ if (NULL != (pm = cp->pending_messages_head))
+ {
+ GNUNET_CONTAINER_DLL_remove (cp->pending_messages_head,
+ cp->pending_messages_tail,
+ pm);
+ cp->pending_requests--;
+ destroy_pending_message (pm, 0);
+ }
+ if (NULL != (pm = cp->pending_messages_head))
+ {
+ GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == cp->delayed_transmission_request_task);
+ min_delay = GNUNET_TIME_absolute_get_remaining (pm->delay_until);
+ cp->delayed_transmission_request_task
+ = GNUNET_SCHEDULER_add_delayed (min_delay,
+ &delayed_transmission_request,
+ cp);
+ }
return 0;
- }
+ }
+ GNUNET_LOAD_update (cp->transmission_delay,
+ GNUNET_TIME_absolute_get_duration (cp->last_transmission_request_start).rel_value);
+ now = GNUNET_TIME_absolute_get ();
msize = 0;
- while ( (NULL != (pm = cp->pending_messages_head) ) &&
+ min_delay = GNUNET_TIME_UNIT_FOREVER_REL;
+ next_pm = cp->pending_messages_head;
+ while ( (NULL != (pm = next_pm) ) &&
(pm->msize <= size) )
{
+ next_pm = pm->next;
+ if (pm->delay_until.abs_value > now.abs_value)
+ {
+ min_delay = GNUNET_TIME_relative_min (min_delay,
+ GNUNET_TIME_absolute_get_remaining (pm->delay_until));
+ continue;
+ }
memcpy (&cbuf[msize], &pm[1], pm->msize);
msize += pm->msize;
size -= pm->msize;
+ if (NULL == pm->pml)
+ {
+ GNUNET_CONTAINER_DLL_remove (cp->pending_messages_head,
+ cp->pending_messages_tail,
+ pm);
+ cp->pending_requests--;
+ }
destroy_pending_message (pm, cp->pid);
}
- if (NULL != pm)
- {
- GNUNET_PEER_resolve (cp->pid,
- &pid);
- cp->cth = GNUNET_CORE_notify_transmit_ready (core,
- pm->priority,
- GNUNET_CONSTANTS_SERVICE_TIMEOUT,
- &pid,
- pm->msize,
- &transmit_to_peer,
- cp);
+ if (pm != NULL)
+ min_delay = GNUNET_TIME_UNIT_ZERO;
+ if (NULL != cp->pending_messages_head)
+ {
+ GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == cp->delayed_transmission_request_task);
+ cp->delayed_transmission_request_task
+ = GNUNET_SCHEDULER_add_delayed (min_delay,
+ &delayed_transmission_request,
+ cp);
}
- else
+ if (pm == NULL)
{
+ GNUNET_PEER_resolve (cp->pid,
+ &pid);
next = mig_head;
while (NULL != (mb = next))
{
GNUNET_PEER_change_rc (mb->target_list[i], -1);
mb->target_list[i] = 0;
mb->used_targets++;
+ memset (&migm, 0, sizeof (migm));
migm.header.size = htons (sizeof (migm) + mb->size);
migm.header.type = htons (GNUNET_MESSAGE_TYPE_FS_PUT);
migm.type = htonl (mb->type);
size -= sizeof (migm);
memcpy (&cbuf[msize], &mb[1], mb->size);
msize += mb->size;
- size -= mb->size;
+ size -= mb->size;
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Pushing migration block `%s' (%u bytes) to `%s'\n",
+ GNUNET_h2s (&mb->query),
+ (unsigned int) mb->size,
+ GNUNET_i2s (&pid));
+#endif
break;
}
+ else
+ {
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Migration block `%s' (%u bytes) is not on migration list for peer `%s'\n",
+ GNUNET_h2s (&mb->query),
+ (unsigned int) mb->size,
+ GNUNET_i2s (&pid));
+#endif
+ }
}
if ( (mb->used_targets >= MIGRATION_TARGET_COUNT) ||
(mb->used_targets >= GNUNET_CONTAINER_multihashmap_size (connected_peers)) )
}
#if DEBUG_FS
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Transmitting %u bytes to peer %u\n",
- msize,
- cp->pid);
+ "Transmitting %u bytes to peer with PID %u\n",
+ (unsigned int) msize,
+ (unsigned int) cp->pid);
#endif
return msize;
}
GNUNET_assert (pm->next == NULL);
GNUNET_assert (pm->pml == NULL);
- pml = GNUNET_malloc (sizeof (struct PendingMessageList));
- pml->req = pr;
- pml->target = cp;
- pml->pm = pm;
- pm->pml = pml;
- GNUNET_CONTAINER_DLL_insert (pr->pending_head,
- pr->pending_tail,
- pml);
+ if (pr != NULL)
+ {
+ pml = GNUNET_malloc (sizeof (struct PendingMessageList));
+ pml->req = pr;
+ pml->target = cp;
+ pml->pm = pm;
+ pm->pml = pml;
+ GNUNET_CONTAINER_DLL_insert (pr->pending_head,
+ pr->pending_tail,
+ pml);
+ }
pos = cp->pending_messages_head;
while ( (pos != NULL) &&
(pm->priority < pos->priority) )
pm);
cp->pending_requests++;
if (cp->pending_requests > MAX_QUEUE_PER_PEER)
- destroy_pending_message (cp->pending_messages_tail, 0);
+ {
+ GNUNET_STATISTICS_update (stats,
+ gettext_noop ("# P2P searches discarded (queue length bound)"),
+ 1,
+ GNUNET_NO);
+ destroy_pending_message (cp->pending_messages_tail, 0);
+ }
GNUNET_PEER_resolve (cp->pid, &pid);
if (NULL != cp->cth)
- GNUNET_CORE_notify_transmit_ready_cancel (cp->cth);
+ {
+ GNUNET_CORE_notify_transmit_ready_cancel (cp->cth);
+ cp->cth = NULL;
+ }
+ if (cp->delayed_transmission_request_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel (cp->delayed_transmission_request_task);
+ cp->delayed_transmission_request_task = GNUNET_SCHEDULER_NO_TASK;
+ }
/* need to schedule transmission */
+ cp->last_transmission_request_start = GNUNET_TIME_absolute_get ();
cp->cth = GNUNET_CORE_notify_transmit_ready (core,
cp->pending_messages_head->priority,
MAX_TRANSMIT_DELAY,
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Failed to schedule transmission with core!\n");
#endif
- /* FIXME: call stats (rare, bad case) */
+ GNUNET_STATISTICS_update (stats,
+ gettext_noop ("# CORE transmission failures"),
+ 1,
+ GNUNET_NO);
}
}
/**
- * Mingle hash with the mingle_number to produce different bits.
+ * Test if the DATABASE (GET) load on this peer is too high
+ * to even consider processing the query at
+ * all.
+ *
+ * @return GNUNET_YES if the load is too high to do anything (load high)
+ * GNUNET_NO to process normally (load normal)
+ * GNUNET_SYSERR to process for free (load low)
*/
-static void
-mingle_hash (const GNUNET_HashCode * in,
- int32_t mingle_number,
- GNUNET_HashCode * hc)
+static int
+test_get_load_too_high (uint32_t priority)
{
- GNUNET_HashCode m;
+ double ld;
- GNUNET_CRYPTO_hash (&mingle_number,
- sizeof (int32_t),
- &m);
- GNUNET_CRYPTO_hash_xor (&m, in, hc);
+ ld = GNUNET_LOAD_get_load (datastore_get_load);
+ if (ld < 1)
+ return GNUNET_SYSERR;
+ if (ld <= priority)
+ return GNUNET_NO;
+ return GNUNET_YES;
}
+
+
/**
- * Test if the load on this peer is too high
+ * Test if the DATABASE (PUT) load on this peer is too high
* to even consider processing the query at
- * all.
+ * all.
*
- * @return GNUNET_YES if the load is too high, GNUNET_NO otherwise
+ * @return GNUNET_YES if the load is too high to do anything (load high)
+ * GNUNET_NO to process normally (load normal or low)
*/
static int
-test_load_too_high ()
+test_put_load_too_high (uint32_t priority)
{
- return GNUNET_NO; // FIXME
+ double ld;
+
+ if (GNUNET_LOAD_get_average (datastore_put_load) < 50)
+ return GNUNET_NO; /* very fast */
+ ld = GNUNET_LOAD_get_load (datastore_put_load);
+ if (ld < 2.0 * (1 + priority))
+ return GNUNET_NO;
+ GNUNET_STATISTICS_update (stats,
+ gettext_noop ("# storage requests dropped due to high load"),
+ 1,
+ GNUNET_NO);
+ return GNUNET_YES;
}
GNUNET_PEER_Id tpid)
{
struct PendingRequest *pr = cls;
+ unsigned int i;
GNUNET_STATISTICS_update (stats,
gettext_noop ("# queries scheduled for forwarding"),
"Transmission of request failed, will try again later.\n");
#endif
if (pr->task == GNUNET_SCHEDULER_NO_TASK)
- pr->task = GNUNET_SCHEDULER_add_delayed (sched,
- get_processing_delay (),
+ pr->task = GNUNET_SCHEDULER_add_delayed (get_processing_delay (),
&forward_request_task,
pr);
return;
}
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Transmitted query `%s'\n",
+ GNUNET_h2s (&pr->query));
+#endif
GNUNET_STATISTICS_update (stats,
gettext_noop ("# queries forwarded"),
1,
GNUNET_NO);
- GNUNET_PEER_change_rc (tpid, 1);
- if (pr->used_pids_off == pr->used_pids_size)
- GNUNET_array_grow (pr->used_pids,
- pr->used_pids_size,
- pr->used_pids_size * 2 + 2);
- pr->used_pids[pr->used_pids_off++] = tpid;
+ for (i=0;i<pr->used_targets_off;i++)
+ if (pr->used_targets[i].pid == tpid)
+ break; /* found match! */
+ if (i == pr->used_targets_off)
+ {
+ /* need to create new entry */
+ if (pr->used_targets_off == pr->used_targets_size)
+ GNUNET_array_grow (pr->used_targets,
+ pr->used_targets_size,
+ pr->used_targets_size * 2 + 2);
+ GNUNET_PEER_change_rc (tpid, 1);
+ pr->used_targets[pr->used_targets_off].pid = tpid;
+ pr->used_targets[pr->used_targets_off].num_requests = 0;
+ i = pr->used_targets_off++;
+ }
+ pr->used_targets[i].last_request_time = GNUNET_TIME_absolute_get ();
+ pr->used_targets[i].num_requests++;
if (pr->task == GNUNET_SCHEDULER_NO_TASK)
- pr->task = GNUNET_SCHEDULER_add_delayed (sched,
- get_processing_delay (),
+ pr->task = GNUNET_SCHEDULER_add_delayed (get_processing_delay (),
&forward_request_task,
pr);
}
BLOOMFILTER_K);
for (i=0;i<pr->replies_seen_off;i++)
{
- mingle_hash (&pr->replies_seen[i], pr->mingle, &mhash);
+ GNUNET_BLOCK_mingle_hash (&pr->replies_seen[i],
+ pr->mingle,
+ &mhash);
GNUNET_CONTAINER_bloomfilter_add (pr->bf, &mhash);
}
}
*
* @param cls the requests "struct PendingRequest*"
* @param peer identifies the peer
- * @param bpm_in set to the current bandwidth limit (receiving) for this peer
* @param bpm_out set to the current bandwidth limit (sending) for this peer
* @param amount set to the amount that was actually reserved or unreserved
* @param preference current traffic preference for the given peer
target_reservation_cb (void *cls,
const struct
GNUNET_PeerIdentity * peer,
- struct GNUNET_BANDWIDTH_Value32NBO bpm_in,
struct GNUNET_BANDWIDTH_Value32NBO bpm_out,
int amount,
uint64_t preference)
unsigned int k;
int no_route;
uint32_t bm;
+ unsigned int i;
- pr->irc = NULL;
- if (peer == NULL)
- {
- /* error in communication with core, try again later */
- if (pr->task == GNUNET_SCHEDULER_NO_TASK)
- pr->task = GNUNET_SCHEDULER_add_delayed (sched,
- get_processing_delay (),
- &forward_request_task,
- pr);
- return;
- }
- // (3) transmit, update ttl/priority
+ /* (3) transmit, update ttl/priority */
cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
&peer->hashPubKey);
if (cp == NULL)
"Selected peer disconnected!\n");
#endif
if (pr->task == GNUNET_SCHEDULER_NO_TASK)
- pr->task = GNUNET_SCHEDULER_add_delayed (sched,
- get_processing_delay (),
+ pr->task = GNUNET_SCHEDULER_add_delayed (get_processing_delay (),
+ &forward_request_task,
+ pr);
+ return;
+ }
+ cp->irc = NULL;
+ pr->pirc = NULL;
+ if (peer == NULL)
+ {
+ /* error in communication with core, try again later */
+ if (pr->task == GNUNET_SCHEDULER_NO_TASK)
+ pr->task = GNUNET_SCHEDULER_add_delayed (get_processing_delay (),
&forward_request_task,
pr);
return;
}
no_route = GNUNET_NO;
- /* FIXME: check against DBLOCK_SIZE and possibly return
- amount to reserve; however, this also needs to work
- with testcases which currently start out with a far
- too low per-peer bw limit, so they would never send
- anything. Big issue. */
if (amount == 0)
{
if (pr->cp == NULL)
1,
GNUNET_NO);
if (pr->task == GNUNET_SCHEDULER_NO_TASK)
- pr->task = GNUNET_SCHEDULER_add_delayed (sched,
- get_processing_delay (),
+ pr->task = GNUNET_SCHEDULER_add_delayed (get_processing_delay (),
&forward_request_task,
pr);
return; /* this target round failed */
}
- /* FIXME: if we are "quite" busy, we may still want to skip
- this round; need more load detection code! */
no_route = GNUNET_YES;
}
gettext_noop ("# queries scheduled for forwarding"),
1,
GNUNET_NO);
+ for (i=0;i<pr->used_targets_off;i++)
+ if (pr->used_targets[i].pid == cp->pid)
+ {
+ GNUNET_STATISTICS_update (stats,
+ gettext_noop ("# queries retransmitted to same target"),
+ 1,
+ GNUNET_NO);
+ break;
+ }
+
/* build message and insert message into priority queue */
#if DEBUG_FS
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
pr->bf_size);
pm->cont = &transmit_query_continuation;
pm->cont_cls = pr;
+ cp->last_request_times[(cp->last_request_times_off++) % MAX_QUEUE_PER_PEER] = GNUNET_TIME_absolute_get ();
add_to_pending_messages_for_peer (cp, pm, pr);
}
*/
double target_score;
+ /**
+ * Does it make sense to we re-try quickly again?
+ */
+ int fast_retry;
+
};
struct PeerSelectionContext *psc = cls;
struct ConnectedPeer *cp = value;
struct PendingRequest *pr = psc->pr;
+ struct GNUNET_TIME_Relative delay;
double score;
unsigned int i;
unsigned int pc;
/* 1) check that this peer is not the initiator */
- if (cp == pr->cp)
- return GNUNET_YES; /* skip */
+ if (cp == pr->cp)
+ {
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Skipping initiator in forwarding selection\n");
+#endif
+ return GNUNET_YES; /* skip */
+ }
+ if (cp->irc != NULL)
+ {
+ psc->fast_retry = GNUNET_YES;
+ return GNUNET_YES; /* skip: already querying core about this peer for other reasons */
+ }
/* 2) check if we have already (recently) forwarded to this peer */
+ /* 2a) this particular request */
pc = 0;
- for (i=0;i<pr->used_pids_off;i++)
- if (pr->used_pids[i] == cp->pid)
+ for (i=0;i<pr->used_targets_off;i++)
+ if (pr->used_targets[i].pid == cp->pid)
{
- pc++;
+ pc = pr->used_targets[i].num_requests;
+ GNUNET_assert (pc > 0);
+ /* FIXME: make re-enabling a peer independent of how often
+ this function is called??? */
if (0 != GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
- RETRY_PROBABILITY_INV))
+ RETRY_PROBABILITY_INV * pc))
{
#if DEBUG_FS
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"NOT re-trying query that was previously transmitted %u times\n",
- (unsigned int) pr->used_pids_off);
+ (unsigned int) pc);
#endif
return GNUNET_YES; /* skip */
}
+ break;
}
#if DEBUG_FS
if (0 < pc)
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "Re-trying query that was previously transmitted %u times to this peer\n",
- (unsigned int) pc);
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "Re-trying query that was previously transmitted %u times to this peer\n",
+ (unsigned int) pc);
+ }
#endif
- // 3) calculate how much we'd like to forward to this peer
- score = 42; // FIXME!
- // FIXME: also need API to gather data on responsiveness
- // of this peer (we have fields for that in 'cp', but
- // they are never set!)
-
+ /* 2b) many other requests to this peer */
+ delay = GNUNET_TIME_absolute_get_duration (cp->last_request_times[cp->last_request_times_off % MAX_QUEUE_PER_PEER]);
+ if (delay.rel_value <= cp->avg_delay.rel_value)
+ {
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "NOT sending query since we send %u others to this peer in the last %llums\n",
+ MAX_QUEUE_PER_PEER,
+ cp->avg_delay.rel_value);
+#endif
+ return GNUNET_YES; /* skip */
+ }
+
+ /* 3) calculate how much we'd like to forward to this peer,
+ starting with a random value that is strong enough
+ to at least give any peer a chance sometimes
+ (compared to the other factors that come later) */
+ /* 3a) count successful (recent) routes from cp for same source */
+ if (pr->cp != NULL)
+ {
+ score = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
+ P2P_SUCCESS_LIST_SIZE);
+ for (i=0;i<P2P_SUCCESS_LIST_SIZE;i++)
+ if (cp->last_p2p_replies[i] == pr->cp->pid)
+ score += 1.0; /* likely successful based on hot path */
+ }
+ else
+ {
+ score = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
+ CS2P_SUCCESS_LIST_SIZE);
+ for (i=0;i<CS2P_SUCCESS_LIST_SIZE;i++)
+ if (cp->last_client_replies[i] == pr->client_request_list->client_list->client)
+ score += 1.0; /* likely successful based on hot path */
+ }
+ /* 3b) include latency */
+ if (cp->avg_delay.rel_value < 4 * TTL_DECREMENT)
+ score += 1.0; /* likely fast based on latency */
+ /* 3c) include priorities */
+ if (cp->avg_priority <= pr->remaining_priority / 2.0)
+ score += 1.0; /* likely successful based on priorities */
+ /* 3d) penalize for queue size */
+ score -= (2.0 * cp->pending_requests / (double) MAX_QUEUE_PER_PEER);
+ /* 3e) include peer proximity */
+ score -= (2.0 * (GNUNET_CRYPTO_hash_distance_u32 (key,
+ &pr->query)) / (double) UINT32_MAX);
+ /* 4) super-bonus for being the known target */
+ if (pr->target_pid == cp->pid)
+ score += 100.0;
/* store best-fit in closure */
+ score++; /* avoid zero */
if (score > psc->target_score)
{
psc->target_score = score;
psc->target.hashPubKey = *key;
}
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Peer `%s' gets score %f for forwarding query, max is %8f\n",
+ GNUNET_h2s (key),
+ score,
+ psc->target_score);
+#endif
return GNUNET_YES;
}
/**
- * We're processing a GET request from another peer and have decided
+ * Iterator called on each result obtained for a DHT
+ * operation that expects a reply
+ *
+ * @param cls closure
+ * @param exp when will this value expire
+ * @param key key of the result
+ * @param get_path NULL-terminated array of pointers
+ * to the peers on reverse GET path (or NULL if not recorded)
+ * @param put_path NULL-terminated array of pointers
+ * to the peers on the PUT path (or NULL if not recorded)
+ * @param type type of the result
+ * @param size number of bytes in data
+ * @param data pointer to the result data
+ */
+static void
+process_dht_reply (void *cls,
+ struct GNUNET_TIME_Absolute exp,
+ const GNUNET_HashCode * key,
+ const struct GNUNET_PeerIdentity * const *get_path,
+ const struct GNUNET_PeerIdentity * const *put_path,
+ enum GNUNET_BLOCK_Type type,
+ size_t size,
+ const void *data);
+
+
+/**
+ * We're processing a GET request and have decided
* to forward it to other peers. This function is called periodically
* and should forward the request to other peers until we have all
* possible replies. If we have transmitted the *only* reply to
struct GNUNET_TIME_Relative delay;
pr->task = GNUNET_SCHEDULER_NO_TASK;
- if (pr->irc != NULL)
+ if (pr->pirc != NULL)
{
#if DEBUG_FS
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
}
if (GNUNET_YES == pr->local_only)
return; /* configured to not do P2P search */
+ /* (0) try DHT */
+ if ( (0 == pr->anonymity_level) &&
+ (GNUNET_YES != pr->forward_only) &&
+ (pr->type != GNUNET_BLOCK_TYPE_FS_DBLOCK) &&
+ (pr->type != GNUNET_BLOCK_TYPE_FS_IBLOCK) )
+ {
+ pr->dht_get = GNUNET_DHT_get_start (dht_handle,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ pr->type,
+ &pr->query,
+ DEFAULT_GET_REPLICATION,
+ GNUNET_DHT_RO_NONE,
+ pr->bf,
+ pr->mingle,
+ pr->namespace,
+ (pr->namespace != NULL) ? sizeof (GNUNET_HashCode) : 0,
+ &process_dht_reply,
+ pr);
+ }
+
+ if ( (pr->anonymity_level > 1) &&
+ (cover_query_count < pr->anonymity_level - 1) )
+ {
+ delay = get_processing_delay ();
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Not enough cover traffic to forward query `%s', will try again in %llu ms!\n",
+ GNUNET_h2s (&pr->query),
+ delay.rel_value);
+#endif
+ pr->task = GNUNET_SCHEDULER_add_delayed (delay,
+ &forward_request_task,
+ pr);
+ return;
+ }
+ /* consume cover traffic */
+ if (pr->anonymity_level > 1)
+ cover_query_count -= pr->anonymity_level - 1;
+
/* (1) select target */
psc.pr = pr;
- psc.target_score = DBL_MIN;
+ psc.target_score = -DBL_MAX;
+ psc.fast_retry = GNUNET_NO;
GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
&target_peer_select_cb,
&psc);
- if (psc.target_score == DBL_MIN)
+ if (psc.target_score == -DBL_MAX)
{
- delay = get_processing_delay ();
+ if (psc.fast_retry == GNUNET_YES)
+ delay = GNUNET_TIME_UNIT_MILLISECONDS; /* FIXME: store adaptive fast-retry value in 'pr' */
+ else
+ delay = get_processing_delay ();
#if DEBUG_FS
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"No peer selected for forwarding of query `%s', will try again in %llu ms!\n",
GNUNET_h2s (&pr->query),
- delay.value);
+ delay.rel_value);
#endif
- pr->task = GNUNET_SCHEDULER_add_delayed (sched,
- delay,
+ pr->task = GNUNET_SCHEDULER_add_delayed (delay,
&forward_request_task,
pr);
return; /* nobody selected */
}
/* (3) update TTL/priority */
-
if (pr->client_request_list != NULL)
{
/* FIXME: use better algorithm!? */
if (0 == GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
4))
pr->priority++;
- /* FIXME: bound priority by "customary" priority used by other peers
- at this time! */
+ /* bound priority we use by priorities we see from other peers
+ rounded up (must round up so that we can see non-zero
+ priorities, but round up as little as possible to make it
+ plausible that we forwarded another peers request) */
+ if (pr->priority > current_priorities + 1.0)
+ pr->priority = (uint32_t) current_priorities + 1.0;
pr->ttl = bound_ttl (pr->ttl + TTL_DECREMENT * 2,
pr->priority);
#if DEBUG_FS
pr->ttl);
#endif
}
+
+ /* (3) reserve reply bandwidth */
+ if (GNUNET_NO == pr->forward_only)
+ {
+ cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
+ &psc.target.hashPubKey);
+ GNUNET_assert (NULL != cp);
+ GNUNET_assert (cp->irc == NULL);
+ pr->pirc = cp;
+ cp->pr = pr;
+ cp->irc = GNUNET_CORE_peer_change_preference (core,
+ &psc.target,
+ GNUNET_CONSTANTS_SERVICE_TIMEOUT,
+ GNUNET_BANDWIDTH_value_init (UINT32_MAX),
+ DBLOCK_SIZE * 2,
+ cp->inc_preference,
+ &target_reservation_cb,
+ pr);
+ GNUNET_assert (cp->irc != NULL);
+ cp->inc_preference = 0;
+ }
else
{
- /* FIXME: should we do something here as well!? */
+ /* force forwarding */
+ static struct GNUNET_BANDWIDTH_Value32NBO zerobw;
+ target_reservation_cb (pr, &psc.target,
+ zerobw, 0, 0.0);
}
-
- /* (3) reserve reply bandwidth */
- cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
- &psc.target.hashPubKey);
- GNUNET_assert (NULL != cp);
- pr->irc = GNUNET_CORE_peer_change_preference (sched, cfg,
- &psc.target,
- GNUNET_CONSTANTS_SERVICE_TIMEOUT,
- GNUNET_BANDWIDTH_value_init ((uint32_t) -1 /* no limit */),
- DBLOCK_SIZE * 2,
- (uint64_t) cp->inc_preference,
- &target_reservation_cb,
- pr);
- cp->inc_preference = 0.0;
}
switch (pr->type)
{
- case GNUNET_BLOCK_TYPE_DBLOCK:
- case GNUNET_BLOCK_TYPE_IBLOCK:
+ case GNUNET_BLOCK_TYPE_FS_DBLOCK:
+ case GNUNET_BLOCK_TYPE_FS_IBLOCK:
/* only one reply expected, done with the request! */
destroy_pending_request (pr);
break;
case GNUNET_BLOCK_TYPE_ANY:
- case GNUNET_BLOCK_TYPE_KBLOCK:
- case GNUNET_BLOCK_TYPE_SBLOCK:
+ case GNUNET_BLOCK_TYPE_FS_KBLOCK:
+ case GNUNET_BLOCK_TYPE_FS_SBLOCK:
break;
default:
GNUNET_break (0);
const void *data;
/**
- * Who gave us this reply? NULL for local host.
+ * Who gave us this reply? NULL for local host (or DHT)
*/
struct ConnectedPeer *sender;
*/
size_t size;
- /**
- * Namespace that this reply belongs to
- * (if it is of type SBLOCK).
- */
- GNUNET_HashCode namespace;
-
/**
* Type of the block.
*/
* How much was this reply worth to us?
*/
uint32_t priority;
+
+ /**
+ * Anonymity requirements for this reply.
+ */
+ uint32_t anonymity_level;
+
+ /**
+ * Evaluation result (returned).
+ */
+ enum GNUNET_BLOCK_EvaluationResult eval;
+
+ /**
+ * Did we finish processing the associated request?
+ */
+ int finished;
+
+ /**
+ * Did we find a matching request?
+ */
+ int request_found;
};
struct PutMessage *pm;
struct ConnectedPeer *cp;
struct GNUNET_TIME_Relative cur_delay;
- GNUNET_HashCode chash;
- GNUNET_HashCode mhash;
+#if SUPPORT_DELAYS
+struct GNUNET_TIME_Relative art_delay;
+#endif
size_t msize;
+ unsigned int i;
+ if (NULL == pr->client_request_list)
+ {
+ /* reply will go over the network, check for cover traffic */
+ if ( (prq->anonymity_level > 1) &&
+ (cover_content_count < prq->anonymity_level - 1) )
+ {
+ /* insufficient cover traffic, skip */
+ GNUNET_STATISTICS_update (stats,
+ gettext_noop ("# replies suppressed due to lack of cover traffic"),
+ 1,
+ GNUNET_NO);
+ return GNUNET_YES;
+ }
+ if (prq->anonymity_level > 1)
+ cover_content_count -= prq->anonymity_level - 1;
+ }
#if DEBUG_FS
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Matched result (type %u) for query `%s' with pending request\n",
GNUNET_NO);
if (prq->sender != NULL)
{
- /* FIXME: should we be more precise here and not use
- "start_time" but a peer-specific time stamp? */
- cur_delay = GNUNET_TIME_absolute_get_duration (pr->start_time);
- prq->sender->avg_delay.value
- = (prq->sender->avg_delay.value *
- (RUNAVG_DELAY_N - 1) + cur_delay.value) / RUNAVG_DELAY_N;
- prq->sender->avg_priority
- = (prq->sender->avg_priority *
- (RUNAVG_DELAY_N - 1) + pr->priority) / (double) RUNAVG_DELAY_N;
+ for (i=0;i<pr->used_targets_off;i++)
+ if (pr->used_targets[i].pid == prq->sender->pid)
+ break;
+ if (i < pr->used_targets_off)
+ {
+ cur_delay = GNUNET_TIME_absolute_get_duration (pr->used_targets[i].last_request_time);
+ prq->sender->avg_delay.rel_value
+ = (prq->sender->avg_delay.rel_value *
+ (RUNAVG_DELAY_N - 1) + cur_delay.rel_value) / RUNAVG_DELAY_N;
+ prq->sender->avg_priority
+ = (prq->sender->avg_priority *
+ (RUNAVG_DELAY_N - 1) + pr->priority) / (double) RUNAVG_DELAY_N;
+ }
if (pr->cp != NULL)
{
GNUNET_PEER_change_rc (prq->sender->last_p2p_replies
- [prq->sender->last_p2p_replies_woff % P2P_SUCCESS_LIST_SIZE], -1);
+ [prq->sender->last_p2p_replies_woff % P2P_SUCCESS_LIST_SIZE],
+ -1);
GNUNET_PEER_change_rc (pr->cp->pid, 1);
prq->sender->last_p2p_replies
[(prq->sender->last_p2p_replies_woff++) % P2P_SUCCESS_LIST_SIZE]
GNUNET_SERVER_client_keep (pr->client_request_list->client_list->client);
}
}
- GNUNET_CRYPTO_hash (prq->data,
- prq->size,
- &chash);
- switch (prq->type)
+ prq->eval = GNUNET_BLOCK_evaluate (block_ctx,
+ prq->type,
+ key,
+ &pr->bf,
+ pr->mingle,
+ pr->namespace, (pr->namespace != NULL) ? sizeof (GNUNET_HashCode) : 0,
+ prq->data,
+ prq->size);
+ switch (prq->eval)
{
- case GNUNET_BLOCK_TYPE_DBLOCK:
- case GNUNET_BLOCK_TYPE_IBLOCK:
- /* only possible reply, stop requesting! */
+ case GNUNET_BLOCK_EVALUATION_OK_MORE:
+ break;
+ case GNUNET_BLOCK_EVALUATION_OK_LAST:
while (NULL != pr->pending_head)
destroy_pending_message_list_entry (pr->pending_head);
if (pr->qe != NULL)
if (pr->client_request_list != NULL)
GNUNET_SERVER_receive_done (pr->client_request_list->client_list->client,
GNUNET_YES);
- GNUNET_DATASTORE_cancel (pr->qe);
+ GNUNET_DATASTORE_cancel (pr->qe);
pr->qe = NULL;
}
pr->do_remove = GNUNET_YES;
if (pr->task != GNUNET_SCHEDULER_NO_TASK)
{
- GNUNET_SCHEDULER_cancel (sched,
- pr->task);
+ GNUNET_SCHEDULER_cancel (pr->task);
pr->task = GNUNET_SCHEDULER_NO_TASK;
}
GNUNET_break (GNUNET_YES ==
GNUNET_CONTAINER_multihashmap_remove (query_request_map,
key,
pr));
+ GNUNET_LOAD_update (rt_entry_lifetime,
+ GNUNET_TIME_absolute_get_duration (pr->start_time).rel_value);
break;
- case GNUNET_BLOCK_TYPE_SBLOCK:
- if (pr->namespace == NULL)
- {
- GNUNET_break (0);
- return GNUNET_YES;
- }
- if (0 != memcmp (pr->namespace,
- &prq->namespace,
- sizeof (GNUNET_HashCode)))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Reply mismatched in terms of namespace. Discarded.\n"));
- return GNUNET_YES; /* wrong namespace */
- }
- /* then: fall-through! */
- case GNUNET_BLOCK_TYPE_KBLOCK:
- case GNUNET_BLOCK_TYPE_NBLOCK:
- if (pr->bf != NULL)
- {
- mingle_hash (&chash, pr->mingle, &mhash);
- if (GNUNET_YES == GNUNET_CONTAINER_bloomfilter_test (pr->bf,
- &mhash))
- {
- GNUNET_STATISTICS_update (stats,
- gettext_noop ("# duplicate replies discarded (bloomfilter)"),
- 1,
- GNUNET_NO);
-#if DEBUG_FS
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Duplicate response `%s', discarding.\n",
- GNUNET_h2s (&mhash));
-#endif
- return GNUNET_YES; /* duplicate */
- }
+ case GNUNET_BLOCK_EVALUATION_OK_DUPLICATE:
+ GNUNET_STATISTICS_update (stats,
+ gettext_noop ("# duplicate replies discarded (bloomfilter)"),
+ 1,
+ GNUNET_NO);
#if DEBUG_FS
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "New response `%s', adding to filter.\n",
- GNUNET_h2s (&mhash));
+/* GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Duplicate response `%s', discarding.\n",
+ GNUNET_h2s (&mhash));*/
#endif
- }
- if (pr->client_request_list != NULL)
- {
- if (pr->replies_seen_size == pr->replies_seen_off)
- GNUNET_array_grow (pr->replies_seen,
- pr->replies_seen_size,
- pr->replies_seen_size * 2 + 4);
- pr->replies_seen[pr->replies_seen_off++] = chash;
- }
- if ( (pr->bf == NULL) ||
- (pr->client_request_list != NULL) )
- refresh_bloomfilter (pr);
- GNUNET_CONTAINER_bloomfilter_add (pr->bf,
- &mhash);
- break;
- default:
+ return GNUNET_YES; /* duplicate */
+ case GNUNET_BLOCK_EVALUATION_RESULT_INVALID:
+ return GNUNET_YES; /* wrong namespace */
+ case GNUNET_BLOCK_EVALUATION_REQUEST_VALID:
+ GNUNET_break (0);
+ return GNUNET_YES;
+ case GNUNET_BLOCK_EVALUATION_REQUEST_INVALID:
GNUNET_break (0);
return GNUNET_YES;
+ case GNUNET_BLOCK_EVALUATION_TYPE_NOT_SUPPORTED:
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Unsupported block type %u\n"),
+ prq->type);
+ return GNUNET_NO;
+ }
+ if (pr->client_request_list != NULL)
+ {
+ if (pr->replies_seen_size == pr->replies_seen_off)
+ GNUNET_array_grow (pr->replies_seen,
+ pr->replies_seen_size,
+ pr->replies_seen_size * 2 + 4);
+ GNUNET_CRYPTO_hash (prq->data,
+ prq->size,
+ &pr->replies_seen[pr->replies_seen_off++]);
+ refresh_bloomfilter (pr);
+ }
+ if (NULL == prq->sender)
+ {
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Found result for query `%s' in local datastore\n",
+ GNUNET_h2s (key));
+#endif
+ GNUNET_STATISTICS_update (stats,
+ gettext_noop ("# results found locally"),
+ 1,
+ GNUNET_NO);
}
prq->priority += pr->remaining_priority;
pr->remaining_priority = 0;
- if (pr->client_request_list != NULL)
+ pr->results_found++;
+ prq->request_found = GNUNET_YES;
+ if (NULL != pr->client_request_list)
{
GNUNET_STATISTICS_update (stats,
gettext_noop ("# replies received for local clients"),
}
GNUNET_break (cl->th != NULL);
if (pr->do_remove)
- destroy_pending_request (pr);
+ {
+ prq->finished = GNUNET_YES;
+ destroy_pending_request (pr);
+ }
}
else
{
reply = GNUNET_malloc (msize + sizeof (struct PendingMessage));
reply->cont = &transmit_reply_continuation;
reply->cont_cls = pr;
+#if SUPPORT_DELAYS
+ art_delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
+ GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
+ TTL_DECREMENT));
+ reply->delay_until
+ = GNUNET_TIME_relative_to_absolute (art_delay);
+ GNUNET_STATISTICS_update (stats,
+ gettext_noop ("cummulative artificial delay introduced (ms)"),
+ art_delay.abs_value,
+ GNUNET_NO);
+#endif
reply->msize = msize;
- reply->priority = (uint32_t) -1; /* send replies first! */
+ reply->priority = UINT32_MAX; /* send replies first! */
pm = (struct PutMessage*) &reply[1];
pm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_PUT);
pm->header.size = htons (msize);
}
+/**
+ * Iterator called on each result obtained for a DHT
+ * operation that expects a reply
+ *
+ * @param cls closure
+ * @param exp when will this value expire
+ * @param key key of the result
+ * @param get_path NULL-terminated array of pointers
+ * to the peers on reverse GET path (or NULL if not recorded)
+ * @param put_path NULL-terminated array of pointers
+ * to the peers on the PUT path (or NULL if not recorded)
+ * @param type type of the result
+ * @param size number of bytes in data
+ * @param data pointer to the result data
+ */
+static void
+process_dht_reply (void *cls,
+ struct GNUNET_TIME_Absolute exp,
+ const GNUNET_HashCode * key,
+ const struct GNUNET_PeerIdentity * const *get_path,
+ const struct GNUNET_PeerIdentity * const *put_path,
+ enum GNUNET_BLOCK_Type type,
+ size_t size,
+ const void *data)
+{
+ struct PendingRequest *pr = cls;
+ struct ProcessReplyClosure prq;
+
+ memset (&prq, 0, sizeof (prq));
+ prq.data = data;
+ prq.expiration = exp;
+ prq.size = size;
+ prq.type = type;
+ process_reply (&prq, key, pr);
+}
+
+
+
/**
* Continuation called to notify client about result of the
* operation.
int success,
const char *msg)
{
- /* FIXME */
+ struct GNUNET_TIME_Absolute *start = cls;
+ struct GNUNET_TIME_Relative delay;
+
+ delay = GNUNET_TIME_absolute_get_duration (*start);
+ GNUNET_free (start);
+ GNUNET_LOAD_update (datastore_put_load,
+ delay.rel_value);
+ if (GNUNET_OK == success)
+ return;
+ GNUNET_STATISTICS_update (stats,
+ gettext_noop ("# datastore 'put' failures"),
+ 1,
+ GNUNET_NO);
}
* @param other the other peer involved (sender or receiver, NULL
* for loopback messages where we are both sender and receiver)
* @param message the actual message
- * @param latency reported latency of the connection with 'other'
- * @param distance reported distance (DV) to 'other'
+ * @param atsi performance information
* @return GNUNET_OK to keep the connection open,
* GNUNET_SYSERR to close it (signal serious error)
*/
handle_p2p_put (void *cls,
const struct GNUNET_PeerIdentity *other,
const struct GNUNET_MessageHeader *message,
- struct GNUNET_TIME_Relative latency,
- uint32_t distance)
+ const struct GNUNET_TRANSPORT_ATS_Information *atsi)
{
const struct PutMessage *put;
uint16_t msize;
struct GNUNET_TIME_Absolute expiration;
GNUNET_HashCode query;
struct ProcessReplyClosure prq;
- const struct SBlock *sb;
+ struct GNUNET_TIME_Absolute *start;
+ struct GNUNET_TIME_Relative block_time;
+ double putl;
+ struct ConnectedPeer *cp;
+ struct PendingMessage *pm;
+ struct MigrationStopMessage *msm;
msize = ntohs (message->size);
if (msize < sizeof (struct PutMessage))
type = ntohl (put->type);
expiration = GNUNET_TIME_absolute_ntoh (put->expiration);
+ if (type == GNUNET_BLOCK_TYPE_FS_ONDEMAND)
+ return GNUNET_SYSERR;
if (GNUNET_OK !=
- GNUNET_BLOCK_check_block (type,
- &put[1],
- dsize,
- &query))
+ GNUNET_BLOCK_get_key (block_ctx,
+ type,
+ &put[1],
+ dsize,
+ &query))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
- if (type == GNUNET_BLOCK_TYPE_ONDEMAND)
- return GNUNET_SYSERR;
- if (GNUNET_BLOCK_TYPE_SBLOCK == type)
- {
- sb = (const struct SBlock*) &put[1];
- GNUNET_CRYPTO_hash (&sb->subspace,
- sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
- &prq.namespace);
- }
-
+ cover_content_count++;
#if DEBUG_FS
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Received result for query `%s' from peer `%4s'\n",
if (other != NULL)
prq.sender = GNUNET_CONTAINER_multihashmap_get (connected_peers,
&other->hashPubKey);
+ else
+ prq.sender = NULL;
prq.size = dsize;
prq.type = type;
prq.expiration = expiration;
prq.priority = 0;
+ prq.anonymity_level = 1;
+ prq.finished = GNUNET_NO;
+ prq.request_found = GNUNET_NO;
GNUNET_CONTAINER_multihashmap_get_multiple (query_request_map,
&query,
&process_reply,
&prq);
- if (GNUNET_YES == active_migration)
+ if (prq.sender != NULL)
{
+ prq.sender->inc_preference += CONTENT_BANDWIDTH_VALUE + 1000 * prq.priority;
+ change_host_trust (prq.sender, prq.priority);
+ }
+ if ( (GNUNET_YES == active_to_migration) &&
+ (GNUNET_NO == test_put_load_too_high (prq.priority)) )
+ {
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Replicating result for query `%s' with priority %u\n",
+ GNUNET_h2s (&query),
+ prq.priority);
+#endif
+ start = GNUNET_malloc (sizeof (struct GNUNET_TIME_Absolute));
+ *start = GNUNET_TIME_absolute_get ();
GNUNET_DATASTORE_put (dsh,
0, &query, dsize, &put[1],
type, prq.priority, 1 /* anonymity */,
1 + prq.priority, MAX_DATASTORE_QUEUE,
GNUNET_CONSTANTS_SERVICE_TIMEOUT,
&put_migration_continuation,
- NULL);
+ start);
+ }
+ putl = GNUNET_LOAD_get_load (datastore_put_load);
+ if ( (GNUNET_NO == prq.request_found) &&
+ ( (GNUNET_YES != active_to_migration) ||
+ (putl > 2.5 * (1 + prq.priority)) ) )
+ {
+ cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
+ &other->hashPubKey);
+ if (GNUNET_TIME_absolute_get_duration (cp->last_migration_block).rel_value < 5000)
+ return GNUNET_OK; /* already blocked */
+ /* We're too busy; send MigrationStop message! */
+ if (GNUNET_YES != active_to_migration)
+ putl = 1.0 + GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 5);
+ block_time = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
+ 5000 + GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
+ (unsigned int) (60000 * putl * putl)));
+
+ cp->last_migration_block = GNUNET_TIME_relative_to_absolute (block_time);
+ pm = GNUNET_malloc (sizeof (struct PendingMessage) +
+ sizeof (struct MigrationStopMessage));
+ pm->msize = sizeof (struct MigrationStopMessage);
+ pm->priority = UINT32_MAX;
+ msm = (struct MigrationStopMessage*) &pm[1];
+ msm->header.size = htons (sizeof (struct MigrationStopMessage));
+ msm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_MIGRATION_STOP);
+ msm->duration = GNUNET_TIME_relative_hton (block_time);
+ add_to_pending_messages_for_peer (cp,
+ pm,
+ NULL);
+ }
+ return GNUNET_OK;
+}
+
+
+/**
+ * Handle P2P "MIGRATION_STOP" message.
+ *
+ * @param cls closure, always NULL
+ * @param other the other peer involved (sender or receiver, NULL
+ * for loopback messages where we are both sender and receiver)
+ * @param message the actual message
+ * @param atsi performance information
+ * @return GNUNET_OK to keep the connection open,
+ * GNUNET_SYSERR to close it (signal serious error)
+ */
+static int
+handle_p2p_migration_stop (void *cls,
+ const struct GNUNET_PeerIdentity *other,
+ const struct GNUNET_MessageHeader *message,
+ const struct GNUNET_TRANSPORT_ATS_Information *atsi)
+{
+ struct ConnectedPeer *cp;
+ const struct MigrationStopMessage *msm;
+
+ msm = (const struct MigrationStopMessage*) message;
+ cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
+ &other->hashPubKey);
+ if (cp == NULL)
+ {
+ GNUNET_break (0);
+ return GNUNET_OK;
}
+ cp->migration_blocked = GNUNET_TIME_relative_to_absolute (GNUNET_TIME_relative_ntoh (msm->duration));
return GNUNET_OK;
}
+
/* **************************** P2P GET Handling ************************ */
static void
process_local_reply (void *cls,
const GNUNET_HashCode * key,
- uint32_t size,
+ size_t size,
const void *data,
enum GNUNET_BLOCK_Type type,
uint32_t priority,
struct PendingRequest *pr = cls;
struct ProcessReplyClosure prq;
struct CheckDuplicateRequestClosure cdrc;
- const struct SBlock *sb;
- GNUNET_HashCode dhash;
- GNUNET_HashCode mhash;
GNUNET_HashCode query;
+ unsigned int old_rf;
if (NULL == key)
{
return;
}
}
-
+ if (pr->local_only == GNUNET_YES)
+ {
+ destroy_pending_request (pr);
+ return;
+ }
/* no more results */
if (pr->task == GNUNET_SCHEDULER_NO_TASK)
- pr->task = GNUNET_SCHEDULER_add_now (sched,
- &forward_request_task,
+ pr->task = GNUNET_SCHEDULER_add_now (&forward_request_task,
pr);
return;
}
GNUNET_h2s (key),
type);
#endif
- if (type == GNUNET_BLOCK_TYPE_ONDEMAND)
+ if (type == GNUNET_BLOCK_TYPE_FS_ONDEMAND)
{
#if DEBUG_FS
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
&process_local_reply,
pr))
if (pr->qe != NULL)
- GNUNET_DATASTORE_get_next (dsh, GNUNET_YES);
- return;
- }
- /* check for duplicates */
- GNUNET_CRYPTO_hash (data, size, &dhash);
- mingle_hash (&dhash,
- pr->mingle,
- &mhash);
- if ( (pr->bf != NULL) &&
- (GNUNET_YES ==
- GNUNET_CONTAINER_bloomfilter_test (pr->bf,
- &mhash)) )
- {
-#if DEBUG_FS
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Result from datastore filtered by bloomfilter (duplicate).\n");
-#endif
- GNUNET_STATISTICS_update (stats,
- gettext_noop ("# results filtered by query bloomfilter"),
- 1,
- GNUNET_NO);
- if (pr->qe != NULL)
- GNUNET_DATASTORE_get_next (dsh, GNUNET_YES);
+ {
+ GNUNET_DATASTORE_get_next (dsh, GNUNET_YES);
+ }
return;
}
-#if DEBUG_FS
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Found result for query `%s' in local datastore\n",
- GNUNET_h2s (key));
-#endif
- GNUNET_STATISTICS_update (stats,
- gettext_noop ("# results found locally"),
- 1,
- GNUNET_NO);
- pr->results_found++;
+ old_rf = pr->results_found;
memset (&prq, 0, sizeof (prq));
prq.data = data;
prq.expiration = expiration;
prq.size = size;
- if (GNUNET_BLOCK_TYPE_SBLOCK == type)
- {
- sb = (const struct SBlock*) data;
- GNUNET_CRYPTO_hash (&sb->subspace,
- sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
- &prq.namespace);
- }
- if (GNUNET_OK != GNUNET_BLOCK_check_block (type,
- data,
- size,
- &query))
+ if (GNUNET_OK !=
+ GNUNET_BLOCK_get_key (block_ctx,
+ type,
+ data,
+ size,
+ &query))
{
GNUNET_break (0);
GNUNET_DATASTORE_remove (dsh,
GNUNET_DATASTORE_get_next (dsh, GNUNET_YES);
return;
}
- if ( (type == GNUNET_BLOCK_TYPE_DBLOCK) ||
- (type == GNUNET_BLOCK_TYPE_IBLOCK) )
+ prq.type = type;
+ prq.priority = priority;
+ prq.finished = GNUNET_NO;
+ prq.request_found = GNUNET_NO;
+ prq.anonymity_level = anonymity;
+ if ( (old_rf == 0) &&
+ (pr->results_found == 0) )
+ update_datastore_delays (pr->start_time);
+ process_reply (&prq, key, pr);
+ if (prq.finished == GNUNET_YES)
+ return;
+ if (pr->qe == NULL)
+ return; /* done here */
+ if (prq.eval == GNUNET_BLOCK_EVALUATION_OK_LAST)
{
- if (pr->qe != NULL)
- GNUNET_DATASTORE_get_next (dsh, GNUNET_NO);
+ pr->local_only = GNUNET_YES; /* do not forward */
+ GNUNET_DATASTORE_get_next (dsh, GNUNET_NO);
+ return;
}
- else if ( (pr->client_request_list == NULL) &&
- ( (GNUNET_YES == test_load_too_high()) ||
+ if ( (pr->client_request_list == NULL) &&
+ ( (GNUNET_YES == test_get_load_too_high (0)) ||
(pr->results_found > 5 + 2 * pr->priority) ) )
{
#if DEBUG_FS > 2
gettext_noop ("# processing result set cut short due to load"),
1,
GNUNET_NO);
- if (pr->qe != NULL)
- GNUNET_DATASTORE_get_next (dsh, GNUNET_NO);
+ GNUNET_DATASTORE_get_next (dsh, GNUNET_NO);
+ return;
}
- else if (pr->qe != NULL)
- GNUNET_DATASTORE_get_next (dsh, GNUNET_YES);
- prq.type = type;
- prq.priority = priority;
- process_reply (&prq, key, pr);
+ GNUNET_DATASTORE_get_next (dsh, GNUNET_YES);
}
* @param cp the peer making the request
* @return effective priority
*/
-static uint32_t
+static int32_t
bound_priority (uint32_t prio_in,
struct ConnectedPeer *cp)
{
- return 0; // FIXME!
+#define N ((double)128.0)
+ uint32_t ret;
+ double rret;
+ int ld;
+
+ ld = test_get_load_too_high (0);
+ if (ld == GNUNET_SYSERR)
+ {
+ GNUNET_STATISTICS_update (stats,
+ gettext_noop ("# requests done for free (low load)"),
+ 1,
+ GNUNET_NO);
+ return 0; /* excess resources */
+ }
+ if (prio_in > INT32_MAX)
+ prio_in = INT32_MAX;
+ ret = - change_host_trust (cp, - (int) prio_in);
+ if (ret > 0)
+ {
+ if (ret > current_priorities + N)
+ rret = current_priorities + N;
+ else
+ rret = ret;
+ current_priorities
+ = (current_priorities * (N-1) + rret)/N;
+ }
+ if ( (ld == GNUNET_YES) && (ret > 0) )
+ {
+ /* try with charging */
+ ld = test_get_load_too_high (ret);
+ }
+ if (ld == GNUNET_YES)
+ {
+ GNUNET_STATISTICS_update (stats,
+ gettext_noop ("# request dropped, priority insufficient"),
+ 1,
+ GNUNET_NO);
+ /* undo charge */
+ change_host_trust (cp, (int) ret);
+ return -1; /* not enough resources */
+ }
+ else
+ {
+ GNUNET_STATISTICS_update (stats,
+ gettext_noop ("# requests done for a price (normal load)"),
+ 1,
+ GNUNET_NO);
+ }
+#undef N
+ return ret;
}
* @param other the other peer involved (sender or receiver, NULL
* for loopback messages where we are both sender and receiver)
* @param message the actual message
- * @param latency reported latency of the connection with 'other'
- * @param distance reported distance (DV) to 'other'
+ * @param atsi performance information
* @return GNUNET_OK to keep the connection open,
* GNUNET_SYSERR to close it (signal serious error)
*/
handle_p2p_get (void *cls,
const struct GNUNET_PeerIdentity *other,
const struct GNUNET_MessageHeader *message,
- struct GNUNET_TIME_Relative latency,
- uint32_t distance)
+ const struct GNUNET_TRANSPORT_ATS_Information *atsi)
{
struct PendingRequest *pr;
struct ConnectedPeer *cp;
uint32_t bm;
size_t bfsize;
uint32_t ttl_decrement;
+ int32_t priority;
enum GNUNET_BLOCK_Type type;
- double preference;
int have_ns;
msize = ntohs(message->size);
return GNUNET_SYSERR;
}
gm = (const struct GetMessage*) message;
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received request for `%s'\n",
+ GNUNET_h2s (&gm->query));
+#endif
type = ntohl (gm->type);
- switch (type)
- {
- case GNUNET_BLOCK_TYPE_ANY:
- case GNUNET_BLOCK_TYPE_DBLOCK:
- case GNUNET_BLOCK_TYPE_IBLOCK:
- case GNUNET_BLOCK_TYPE_KBLOCK:
- case GNUNET_BLOCK_TYPE_SBLOCK:
- break;
- default:
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
bm = ntohl (gm->hash_bitmap);
bits = 0;
while (bm > 0)
return GNUNET_SYSERR;
}
opt = (const GNUNET_HashCode*) &gm[1];
- bfsize = msize - sizeof (struct GetMessage) + bits * sizeof (GNUNET_HashCode);
- bm = ntohl (gm->hash_bitmap);
- if ( (0 != (bm & GET_MESSAGE_BIT_SKS_NAMESPACE)) &&
- (type != GNUNET_BLOCK_TYPE_SBLOCK) )
+ bfsize = msize - sizeof (struct GetMessage) - bits * sizeof (GNUNET_HashCode);
+ /* bfsize must be power of 2, check! */
+ if (0 != ( (bfsize - 1) & bfsize))
{
GNUNET_break_op (0);
- return GNUNET_SYSERR;
+ return GNUNET_SYSERR;
}
+ cover_query_count++;
+ bm = ntohl (gm->hash_bitmap);
bits = 0;
cps = GNUNET_CONTAINER_multihashmap_get (connected_peers,
&other->hashPubKey);
/* note that we can really only check load here since otherwise
peers could find out that we are overloaded by not being
disconnected after sending us a malformed query... */
- if (GNUNET_YES == test_load_too_high ())
+ priority = bound_priority (ntohl (gm->priority), cps);
+ if (priority < 0)
{
#if DEBUG_FS
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Dropping query from `%s', this peer is too busy.\n",
GNUNET_i2s (other));
#endif
- GNUNET_STATISTICS_update (stats,
- gettext_noop ("# requests dropped due to high load"),
- 1,
- GNUNET_NO);
return GNUNET_OK;
}
-
#if DEBUG_FS
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Received request for `%s' of type %u from peer `%4s' with flags %u\n",
pr = GNUNET_malloc (sizeof (struct PendingRequest) +
(have_ns ? sizeof(GNUNET_HashCode) : 0));
if (have_ns)
- pr->namespace = (GNUNET_HashCode*) &pr[1];
+ {
+ pr->namespace = (GNUNET_HashCode*) &pr[1];
+ memcpy (&pr[1], &opt[bits++], sizeof (GNUNET_HashCode));
+ }
+ if ( (GNUNET_LOAD_get_load (cp->transmission_delay) > 3 * (1 + priority)) ||
+ (GNUNET_LOAD_get_average (cp->transmission_delay) >
+ GNUNET_CONSTANTS_MAX_CORK_DELAY.rel_value * 2 + GNUNET_LOAD_get_average (rt_entry_lifetime)) )
+ {
+ /* don't have BW to send to peer, or would likely take longer than we have for it,
+ so at best indirect the query */
+ priority = 0;
+ pr->forward_only = GNUNET_YES;
+ }
pr->type = type;
pr->mingle = ntohl (gm->filter_mutator);
- if (0 != (bm & GET_MESSAGE_BIT_SKS_NAMESPACE))
- memcpy (&pr[1], &opt[bits++], sizeof (GNUNET_HashCode));
if (0 != (bm & GET_MESSAGE_BIT_TRANSMIT_TO))
pr->target_pid = GNUNET_PEER_intern ((const struct GNUNET_PeerIdentity*) &opt[bits++]);
-
pr->anonymity_level = 1;
- pr->priority = bound_priority (ntohl (gm->priority), cps);
+ pr->priority = (uint32_t) priority;
pr->ttl = bound_ttl (ntohl (gm->ttl), pr->priority);
pr->query = gm->query;
/* decrement ttl (always) */
gettext_noop ("# requests dropped due TTL underflow"),
1,
GNUNET_NO);
- /* integer underflow => drop (should be very rare)! */
+ /* integer underflow => drop (should be very rare)! */
GNUNET_free (pr);
return GNUNET_OK;
}
BLOOMFILTER_K);
pr->bf_size = bfsize;
}
-
cdc.have = NULL;
cdc.pr = pr;
GNUNET_CONTAINER_multihashmap_get_multiple (query_request_map,
&cdc);
if (cdc.have != NULL)
{
- if (cdc.have->start_time.value + cdc.have->ttl >=
- pr->start_time.value + pr->ttl)
+ if (cdc.have->start_time.abs_value + cdc.have->ttl >=
+ pr->start_time.abs_value + pr->ttl)
{
/* existing request has higher TTL, drop new one! */
cdc.have->priority += pr->priority;
pr->hnode = GNUNET_CONTAINER_heap_insert (requests_by_expiration_heap,
pr,
- pr->start_time.value + pr->ttl);
+ pr->start_time.abs_value + pr->ttl);
GNUNET_STATISTICS_update (stats,
gettext_noop ("# P2P searches received"),
GNUNET_NO);
/* calculate change in traffic preference */
- preference = (double) pr->priority;
- if (preference < QUERY_BANDWIDTH_VALUE)
- preference = QUERY_BANDWIDTH_VALUE;
- cps->inc_preference += preference;
-
+ cps->inc_preference += pr->priority * 1000 + QUERY_BANDWIDTH_VALUE;
/* process locally */
- if (type == GNUNET_BLOCK_TYPE_DBLOCK)
+ if (type == GNUNET_BLOCK_TYPE_FS_DBLOCK)
type = GNUNET_BLOCK_TYPE_ANY; /* to get on-demand as well */
timeout = GNUNET_TIME_relative_multiply (BASIC_DATASTORE_REQUEST_DELAY,
(pr->priority + 1));
- pr->qe = GNUNET_DATASTORE_get (dsh,
- &gm->query,
- type,
- pr->priority + 1,
- MAX_DATASTORE_QUEUE,
- timeout,
- &process_local_reply,
- pr);
+ if (GNUNET_YES != pr->forward_only)
+ {
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Handing request for `%s' to datastore\n",
+ GNUNET_h2s (&gm->query));
+#endif
+ pr->qe = GNUNET_DATASTORE_get (dsh,
+ &gm->query,
+ type,
+ pr->priority + 1,
+ MAX_DATASTORE_QUEUE,
+ timeout,
+ &process_local_reply,
+ pr);
+ if (NULL == pr->qe)
+ {
+ GNUNET_STATISTICS_update (stats,
+ gettext_noop ("# requests dropped by datastore (queue length limit)"),
+ 1,
+ GNUNET_NO);
+ }
+ }
+ else
+ {
+ GNUNET_STATISTICS_update (stats,
+ gettext_noop ("# requests forwarded due to high load"),
+ 1,
+ GNUNET_NO);
+ }
- /* Are multiple results possible? If so, start processing remotely now! */
+ /* Are multiple results possible (and did we look locally)? If so, start processing remotely now! */
switch (pr->type)
{
- case GNUNET_BLOCK_TYPE_DBLOCK:
- case GNUNET_BLOCK_TYPE_IBLOCK:
+ case GNUNET_BLOCK_TYPE_FS_DBLOCK:
+ case GNUNET_BLOCK_TYPE_FS_IBLOCK:
/* only one result, wait for datastore */
- break;
+ if (GNUNET_YES != pr->forward_only)
+ {
+ GNUNET_STATISTICS_update (stats,
+ gettext_noop ("# requests not instantly forwarded (waiting for datastore)"),
+ 1,
+ GNUNET_NO);
+ break;
+ }
default:
if (pr->task == GNUNET_SCHEDULER_NO_TASK)
- pr->task = GNUNET_SCHEDULER_add_now (sched,
- &forward_request_task,
+ pr->task = GNUNET_SCHEDULER_add_now (&forward_request_task,
pr);
}
if (GNUNET_CONTAINER_heap_get_size (requests_by_expiration_heap) > max_pending_requests)
{
pr = GNUNET_CONTAINER_heap_peek (requests_by_expiration_heap);
+ GNUNET_assert (pr != NULL);
destroy_pending_request (pr);
}
return GNUNET_OK;
GNUNET_h2s (&sm->query),
(unsigned int) type);
#endif
- switch (type)
- {
- case GNUNET_BLOCK_TYPE_ANY:
- case GNUNET_BLOCK_TYPE_DBLOCK:
- case GNUNET_BLOCK_TYPE_IBLOCK:
- case GNUNET_BLOCK_TYPE_KBLOCK:
- case GNUNET_BLOCK_TYPE_SBLOCK:
- case GNUNET_BLOCK_TYPE_NBLOCK:
- break;
- default:
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client,
- GNUNET_SYSERR);
- return;
- }
-
cl = client_list;
while ( (cl != NULL) &&
(cl->client != client) )
client_list = cl;
}
/* detect duplicate KBLOCK requests */
- if ( (type == GNUNET_BLOCK_TYPE_KBLOCK) ||
- (type == GNUNET_BLOCK_TYPE_NBLOCK) ||
+ if ( (type == GNUNET_BLOCK_TYPE_FS_KBLOCK) ||
+ (type == GNUNET_BLOCK_TYPE_FS_NBLOCK) ||
(type == GNUNET_BLOCK_TYPE_ANY) )
{
crl = cl->rl_head;
1,
GNUNET_NO);
pr = GNUNET_malloc (sizeof (struct PendingRequest) +
- ((type == GNUNET_BLOCK_TYPE_SBLOCK) ? sizeof(GNUNET_HashCode) : 0));
+ ((type == GNUNET_BLOCK_TYPE_FS_SBLOCK) ? sizeof(GNUNET_HashCode) : 0));
crl = GNUNET_malloc (sizeof (struct ClientRequestList));
memset (crl, 0, sizeof (struct ClientRequestList));
crl->client_list = cl;
sc * sizeof (GNUNET_HashCode));
pr->replies_seen_off = sc;
pr->anonymity_level = ntohl (sm->anonymity_level);
+ pr->start_time = GNUNET_TIME_absolute_get ();
refresh_bloomfilter (pr);
pr->query = sm->query;
if (0 == (1 & ntohl (sm->options)))
pr->local_only = GNUNET_YES;
switch (type)
{
- case GNUNET_BLOCK_TYPE_DBLOCK:
- case GNUNET_BLOCK_TYPE_IBLOCK:
+ case GNUNET_BLOCK_TYPE_FS_DBLOCK:
+ case GNUNET_BLOCK_TYPE_FS_IBLOCK:
if (0 != memcmp (&sm->target,
&all_zeros,
sizeof (GNUNET_HashCode)))
pr->target_pid = GNUNET_PEER_intern ((const struct GNUNET_PeerIdentity*) &sm->target);
break;
- case GNUNET_BLOCK_TYPE_SBLOCK:
+ case GNUNET_BLOCK_TYPE_FS_SBLOCK:
pr->namespace = (GNUNET_HashCode*) &pr[1];
memcpy (&pr[1], &sm->target, sizeof (GNUNET_HashCode));
break;
&sm->query,
pr,
GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
- if (type == GNUNET_BLOCK_TYPE_DBLOCK)
+ if (type == GNUNET_BLOCK_TYPE_FS_DBLOCK)
type = GNUNET_BLOCK_TYPE_ANY; /* get on-demand blocks too! */
pr->qe = GNUNET_DATASTORE_get (dsh,
&sm->query,
/* **************************** Startup ************************ */
-
-/**
- * List of handlers for P2P messages
- * that we care about.
- */
-static struct GNUNET_CORE_MessageHandler p2p_handlers[] =
- {
- { &handle_p2p_get,
- GNUNET_MESSAGE_TYPE_FS_GET, 0 },
- { &handle_p2p_put,
- GNUNET_MESSAGE_TYPE_FS_PUT, 0 },
- { NULL, 0, 0 }
- };
-
-
-/**
- * List of handlers for the messages understood by this
- * service.
- */
-static struct GNUNET_SERVER_MessageHandler handlers[] = {
- {&GNUNET_FS_handle_index_start, NULL,
- GNUNET_MESSAGE_TYPE_FS_INDEX_START, 0},
- {&GNUNET_FS_handle_index_list_get, NULL,
- GNUNET_MESSAGE_TYPE_FS_INDEX_LIST_GET, sizeof(struct GNUNET_MessageHeader) },
- {&GNUNET_FS_handle_unindex, NULL, GNUNET_MESSAGE_TYPE_FS_UNINDEX,
- sizeof (struct UnindexMessage) },
- {&handle_start_search, NULL, GNUNET_MESSAGE_TYPE_FS_START_SEARCH,
- 0 },
- {NULL, NULL, 0, 0}
-};
-
-
/**
* Process fs requests.
*
- * @param s scheduler to use
* @param server the initialized server
* @param c configuration to use
*/
static int
-main_init (struct GNUNET_SCHEDULER_Handle *s,
- struct GNUNET_SERVER_Handle *server,
+main_init (struct GNUNET_SERVER_Handle *server,
const struct GNUNET_CONFIGURATION_Handle *c)
{
- sched = s;
+ static const struct GNUNET_CORE_MessageHandler p2p_handlers[] =
+ {
+ { &handle_p2p_get,
+ GNUNET_MESSAGE_TYPE_FS_GET, 0 },
+ { &handle_p2p_put,
+ GNUNET_MESSAGE_TYPE_FS_PUT, 0 },
+ { &handle_p2p_migration_stop,
+ GNUNET_MESSAGE_TYPE_FS_MIGRATION_STOP,
+ sizeof (struct MigrationStopMessage) },
+ { NULL, 0, 0 }
+ };
+ static const struct GNUNET_SERVER_MessageHandler handlers[] = {
+ {&GNUNET_FS_handle_index_start, NULL,
+ GNUNET_MESSAGE_TYPE_FS_INDEX_START, 0},
+ {&GNUNET_FS_handle_index_list_get, NULL,
+ GNUNET_MESSAGE_TYPE_FS_INDEX_LIST_GET, sizeof(struct GNUNET_MessageHeader) },
+ {&GNUNET_FS_handle_unindex, NULL, GNUNET_MESSAGE_TYPE_FS_UNINDEX,
+ sizeof (struct UnindexMessage) },
+ {&handle_start_search, NULL, GNUNET_MESSAGE_TYPE_FS_START_SEARCH,
+ 0 },
+ {NULL, NULL, 0, 0}
+ };
+ unsigned long long enc = 128;
+
cfg = c;
- stats = GNUNET_STATISTICS_create (sched, "fs", cfg);
- min_migration_delay = GNUNET_TIME_UNIT_SECONDS; // FIXME: get from config
- connected_peers = GNUNET_CONTAINER_multihashmap_create (128); // FIXME: get size from config
- query_request_map = GNUNET_CONTAINER_multihashmap_create (128); // FIXME: get size from config
- peer_request_map = GNUNET_CONTAINER_multihashmap_create (128); // FIXME: get size from config
+ stats = GNUNET_STATISTICS_create ("fs", cfg);
+ min_migration_delay = GNUNET_TIME_UNIT_SECONDS;
+ if ( (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_number (cfg,
+ "fs",
+ "MAX_PENDING_REQUESTS",
+ &max_pending_requests)) ||
+ (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_number (cfg,
+ "fs",
+ "EXPECTED_NEIGHBOUR_COUNT",
+ &enc)) ||
+ (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_time (cfg,
+ "fs",
+ "MIN_MIGRATION_DELAY",
+ &min_migration_delay)) )
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ _("Configuration fails to specify certain parameters, assuming default values."));
+ }
+ connected_peers = GNUNET_CONTAINER_multihashmap_create (enc);
+ query_request_map = GNUNET_CONTAINER_multihashmap_create (max_pending_requests);
+ rt_entry_lifetime = GNUNET_LOAD_value_init (GNUNET_TIME_UNIT_FOREVER_REL);
+ peer_request_map = GNUNET_CONTAINER_multihashmap_create (enc);
requests_by_expiration_heap = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
- core = GNUNET_CORE_connect (sched,
- cfg,
- GNUNET_TIME_UNIT_FOREVER_REL,
+ core = GNUNET_CORE_connect (cfg,
+ 1, /* larger? */
NULL,
NULL,
&peer_connect_handler,
&peer_disconnect_handler,
+ &peer_status_handler,
NULL, GNUNET_NO,
NULL, GNUNET_NO,
p2p_handlers);
connected_peers = NULL;
GNUNET_CONTAINER_multihashmap_destroy (query_request_map);
query_request_map = NULL;
+ GNUNET_LOAD_value_free (rt_entry_lifetime);
+ rt_entry_lifetime = NULL;
GNUNET_CONTAINER_heap_destroy (requests_by_expiration_heap);
requests_by_expiration_heap = NULL;
GNUNET_CONTAINER_multihashmap_destroy (peer_request_map);
}
return GNUNET_SYSERR;
}
- /* FIXME: distinguish between sending and storing in options? */
- if (active_migration)
- consider_migration_gathering ();
+ if (active_from_migration)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ _("Content migration is enabled, will start to gather data\n"));
+ consider_migration_gathering ();
+ }
+ consider_dht_put_gathering (NULL);
GNUNET_SERVER_disconnect_notify (server,
&handle_client_disconnect,
NULL);
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_CONFIGURATION_get_value_filename (cfg,
+ "fs",
+ "TRUST",
+ &trustDirectory));
+ GNUNET_DISK_directory_create (trustDirectory);
+ GNUNET_SCHEDULER_add_with_priority (GNUNET_SCHEDULER_PRIORITY_HIGH,
+ &cron_flush_trust, NULL);
+
+
GNUNET_SERVER_add_handlers (server, handlers);
- GNUNET_SCHEDULER_add_delayed (sched,
- GNUNET_TIME_UNIT_FOREVER_REL,
+ cover_age_task = GNUNET_SCHEDULER_add_delayed (COVER_AGE_FREQUENCY,
+ &age_cover_counters,
+ NULL);
+ GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
&shutdown_task,
NULL);
return GNUNET_OK;
* Process fs requests.
*
* @param cls closure
- * @param sched scheduler to use
* @param server the initialized server
* @param cfg configuration to use
*/
static void
run (void *cls,
- struct GNUNET_SCHEDULER_Handle *sched,
struct GNUNET_SERVER_Handle *server,
const struct GNUNET_CONFIGURATION_Handle *cfg)
{
- active_migration = GNUNET_CONFIGURATION_get_value_yesno (cfg,
- "FS",
- "ACTIVEMIGRATION");
- dsh = GNUNET_DATASTORE_connect (cfg,
- sched);
+ active_to_migration = GNUNET_CONFIGURATION_get_value_yesno (cfg,
+ "FS",
+ "CONTENT_CACHING");
+ active_from_migration = GNUNET_CONFIGURATION_get_value_yesno (cfg,
+ "FS",
+ "CONTENT_PUSHING");
+ dsh = GNUNET_DATASTORE_connect (cfg);
if (dsh == NULL)
{
- GNUNET_SCHEDULER_shutdown (sched);
+ GNUNET_SCHEDULER_shutdown ();
return;
}
- if ( (GNUNET_OK != GNUNET_FS_indexing_init (sched, cfg, dsh)) ||
- (GNUNET_OK != main_init (sched, server, cfg)) )
+ datastore_get_load = GNUNET_LOAD_value_init (DATASTORE_LOAD_AUTODECLINE);
+ datastore_put_load = GNUNET_LOAD_value_init (DATASTORE_LOAD_AUTODECLINE);
+ block_cfg = GNUNET_CONFIGURATION_create ();
+ GNUNET_CONFIGURATION_set_value_string (block_cfg,
+ "block",
+ "PLUGINS",
+ "fs");
+ block_ctx = GNUNET_BLOCK_context_create (block_cfg);
+ GNUNET_assert (NULL != block_ctx);
+ dht_handle = GNUNET_DHT_connect (cfg,
+ FS_DHT_HT_SIZE);
+ if ( (GNUNET_OK != GNUNET_FS_indexing_init (cfg, dsh)) ||
+ (GNUNET_OK != main_init (server, cfg)) )
{
- GNUNET_SCHEDULER_shutdown (sched);
+ GNUNET_SCHEDULER_shutdown ();
GNUNET_DATASTORE_disconnect (dsh, GNUNET_NO);
dsh = NULL;
+ GNUNET_DHT_disconnect (dht_handle);
+ dht_handle = NULL;
+ GNUNET_BLOCK_context_destroy (block_ctx);
+ block_ctx = NULL;
+ GNUNET_CONFIGURATION_destroy (block_cfg);
+ block_cfg = NULL;
+ GNUNET_LOAD_value_free (datastore_get_load);
+ datastore_get_load = NULL;
+ GNUNET_LOAD_value_free (datastore_put_load);
+ datastore_put_load = NULL;
return;
}
}
projects / oweals / gnunet.git / blobdiff