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3 (C) 2009, 2010 Christian Grothoff (and other contributing authors)
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22 * @file fs/gnunet-service-fs.c
23 * @brief gnunet anonymity protocol implementation
24 * @author Christian Grothoff
28 #include "gnunet_constants.h"
29 #include "gnunet_core_service.h"
30 #include "gnunet_dht_service.h"
31 #include "gnunet_datastore_service.h"
32 #include "gnunet_load_lib.h"
33 #include "gnunet_peer_lib.h"
34 #include "gnunet_protocols.h"
35 #include "gnunet_signatures.h"
36 #include "gnunet_statistics_service.h"
37 #include "gnunet_transport_service.h"
38 #include "gnunet_util_lib.h"
39 #include "gnunet-service-fs_indexing.h"
42 #define DEBUG_FS GNUNET_NO
45 * Should we introduce random latency in processing? Required for proper
46 * implementation of GAP, but can be disabled for performance evaluation of
47 * the basic routing algorithm.
49 * Note that with delays enabled, performance can be significantly lower
50 * (several orders of magnitude in 2-peer test runs); if you want to
51 * measure throughput of other components, set this to NO. Also, you
52 * might want to consider changing 'RETRY_PROBABILITY_INV' to 1 for
53 * a rather wasteful mode of operation (that might still get the highest
54 * throughput overall).
56 * Performance measurements (for 50 MB file, 2 peers):
58 * - Without delays: 3300 kb/s
59 * - With delays: 101 kb/s
61 #define SUPPORT_DELAYS GNUNET_NO
64 * Size for the hash map for DHT requests from the FS
65 * service. Should be about the number of concurrent
66 * DHT requests we plan to make.
68 #define FS_DHT_HT_SIZE 1024
71 * At what frequency should our datastore load decrease
72 * automatically (since if we don't use it, clearly the
73 * load must be going down).
75 #define DATASTORE_LOAD_AUTODECLINE GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 250)
78 * How often do we flush trust values to disk?
80 #define TRUST_FLUSH_FREQ GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 5)
83 * How quickly do we age cover traffic? At the given
84 * time interval, remaining cover traffic counters are
85 * decremented by 1/16th.
87 #define COVER_AGE_FREQUENCY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 5)
90 * How often do we at most PUT content into the DHT?
92 #define MAX_DHT_PUT_FREQ GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 5)
95 * How long must content remain valid for us to consider it for migration?
96 * If content will expire too soon, there is clearly no point in pushing
97 * it to other peers. This value gives the threshold for migration. Note
98 * that if this value is increased, the migration testcase may need to be
99 * adjusted as well (especially the CONTENT_LIFETIME in fs_test_lib.c).
101 #define MIN_MIGRATION_CONTENT_LIFETIME GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 30)
104 * Inverse of the probability that we will submit the same query
105 * to the same peer again. If the same peer already got the query
106 * repeatedly recently, the probability is multiplied by the inverse
107 * of this number each time. Note that we only try about every TTL_DECREMENT/2
108 * plus MAX_CORK_DELAY (so roughly every 3.5s).
110 * Note that this factor is a key influence to performance in small
111 * networks (especially test networks of 2 peers) because if there is
112 * only a single peer with the data, this value will determine how
113 * soon we might re-try. For example, a value of 3 can result in
114 * 1.7 MB/s transfer rates for a 10 MB file when a value of 1 would
115 * give us 5 MB/s. OTOH, obviously re-trying the same peer can be
116 * rather inefficient in larger networks, hence picking 1 is in
117 * general not the best choice.
119 * Performance measurements (for 50 MB file, 2 peers, no delays):
121 * - 1: 3300 kb/s (consistently)
122 * - 3: 2046 kb/s, 754 kb/s, 3490 kb/s
123 * - 5: 759 kb/s, 968 kb/s, 1160 kb/s
125 * Note that this does NOT mean that the value should be 1 since
126 * a 2-peer network is far from representative here (and this fails
127 * to take into consideration bandwidth wasted by repeatedly
128 * sending queries to peers that don't have the content). Also,
129 * it is expected that higher values lead to more inconsistent
130 * measurements since this only affects lost messages towards the
131 * end of the download.
133 * Finally, we should probably consider changing this and making
134 * it dependent on the number of connected peers or a related
135 * metric (bad magic constants...).
137 #define RETRY_PROBABILITY_INV 1
140 * What is the maximum delay for a P2P FS message (in our interaction
141 * with core)? FS-internal delays are another story. The value is
142 * chosen based on the 32k block size. Given that peers typcially
143 * have at least 1 kb/s bandwidth, 45s waits give us a chance to
144 * transmit one message even to the lowest-bandwidth peers.
146 #define MAX_TRANSMIT_DELAY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 45)
149 * Maximum number of requests (from other peers, overall) that we're
150 * willing to have pending at any given point in time. Can be changed
151 * via the configuration file (32k is just the default).
153 static unsigned long long max_pending_requests = (32 * 1024);
156 * Information we keep for each pending reply. The
157 * actual message follows at the end of this struct.
159 struct PendingMessage;
162 * Function called upon completion of a transmission.
165 * @param pid ID of receiving peer, 0 on transmission error
167 typedef void (*TransmissionContinuation)(void * cls,
168 GNUNET_PEER_Id tpid);
172 * Information we keep for each pending message (GET/PUT). The
173 * actual message follows at the end of this struct.
175 struct PendingMessage
178 * This is a doubly-linked list of messages to the same peer.
180 struct PendingMessage *next;
183 * This is a doubly-linked list of messages to the same peer.
185 struct PendingMessage *prev;
188 * Entry in pending message list for this pending message.
190 struct PendingMessageList *pml;
193 * Function to call immediately once we have transmitted this
196 TransmissionContinuation cont;
204 * Do not transmit this pending message until this deadline.
206 struct GNUNET_TIME_Absolute delay_until;
209 * Size of the reply; actual reply message follows
210 * at the end of this struct.
215 * How important is this message for us?
223 * Information about a peer that we are connected to.
224 * We track data that is useful for determining which
225 * peers should receive our requests. We also keep
226 * a list of messages to transmit to this peer.
232 * List of the last clients for which this peer successfully
235 struct GNUNET_SERVER_Client *last_client_replies[CS2P_SUCCESS_LIST_SIZE];
238 * List of the last PIDs for which
239 * this peer successfully answered a query;
240 * We use 0 to indicate no successful reply.
242 GNUNET_PEER_Id last_p2p_replies[P2P_SUCCESS_LIST_SIZE];
245 * Average delay between sending the peer a request and
246 * getting a reply (only calculated over the requests for
247 * which we actually got a reply). Calculated
248 * as a moving average: new_delay = ((n-1)*last_delay+curr_delay) / n
250 struct GNUNET_TIME_Relative avg_delay;
253 * Point in time until which this peer does not want us to migrate content
256 struct GNUNET_TIME_Absolute migration_blocked;
259 * Time until when we blocked this peer from migrating
262 struct GNUNET_TIME_Absolute last_migration_block;
265 * Transmission times for the last MAX_QUEUE_PER_PEER
266 * requests for this peer. Used as a ring buffer, current
267 * offset is stored in 'last_request_times_off'. If the
268 * oldest entry is more recent than the 'avg_delay', we should
269 * not send any more requests right now.
271 struct GNUNET_TIME_Absolute last_request_times[MAX_QUEUE_PER_PEER];
274 * Handle for an active request for transmission to this
277 struct GNUNET_CORE_TransmitHandle *cth;
280 * Messages (replies, queries, content migration) we would like to
281 * send to this peer in the near future. Sorted by priority, head.
283 struct PendingMessage *pending_messages_head;
286 * Messages (replies, queries, content migration) we would like to
287 * send to this peer in the near future. Sorted by priority, tail.
289 struct PendingMessage *pending_messages_tail;
292 * How long does it typically take for us to transmit a message
293 * to this peer? (delay between the request being issued and
294 * the callback being invoked).
296 struct GNUNET_LOAD_Value *transmission_delay;
299 * Context of our GNUNET_CORE_peer_change_preference call (or NULL).
301 struct GNUNET_CORE_InformationRequestContext *irc;
304 * Request for which 'irc' is currently active (or NULL).
306 struct PendingRequest *pr;
309 * Time when the last transmission request was issued.
311 struct GNUNET_TIME_Absolute last_transmission_request_start;
314 * ID of delay task for scheduling transmission.
316 GNUNET_SCHEDULER_TaskIdentifier delayed_transmission_request_task;
319 * Average priority of successful replies. Calculated
320 * as a moving average: new_avg = ((n-1)*last_avg+curr_prio) / n
325 * Increase in traffic preference still to be submitted
326 * to the core service for this peer.
328 uint64_t inc_preference;
331 * Trust rating for this peer
336 * Trust rating for this peer on disk.
341 * The peer's identity.
346 * Size of the linked list of 'pending_messages'.
348 unsigned int pending_requests;
351 * Which offset in "last_p2p_replies" will be updated next?
352 * (we go round-robin).
354 unsigned int last_p2p_replies_woff;
357 * Which offset in "last_client_replies" will be updated next?
358 * (we go round-robin).
360 unsigned int last_client_replies_woff;
363 * Current offset into 'last_request_times' ring buffer.
365 unsigned int last_request_times_off;
371 * Information we keep for each pending request. We should try to
372 * keep this struct as small as possible since its memory consumption
373 * is key to how many requests we can have pending at once.
375 struct PendingRequest;
379 * Doubly-linked list of requests we are performing
380 * on behalf of the same client.
382 struct ClientRequestList
386 * This is a doubly-linked list.
388 struct ClientRequestList *next;
391 * This is a doubly-linked list.
393 struct ClientRequestList *prev;
396 * Request this entry represents.
398 struct PendingRequest *req;
401 * Client list this request belongs to.
403 struct ClientList *client_list;
409 * Replies to be transmitted to the client. The actual
410 * response message is allocated after this struct.
412 struct ClientResponseMessage
415 * This is a doubly-linked list.
417 struct ClientResponseMessage *next;
420 * This is a doubly-linked list.
422 struct ClientResponseMessage *prev;
425 * Client list entry this response belongs to.
427 struct ClientList *client_list;
430 * Number of bytes in the response.
437 * Linked list of clients we are performing requests
443 * This is a linked list.
445 struct ClientList *next;
448 * ID of a client making a request, NULL if this entry is for a
451 struct GNUNET_SERVER_Client *client;
454 * Head of list of requests performed on behalf
455 * of this client right now.
457 struct ClientRequestList *rl_head;
460 * Tail of list of requests performed on behalf
461 * of this client right now.
463 struct ClientRequestList *rl_tail;
466 * Head of linked list of responses.
468 struct ClientResponseMessage *res_head;
471 * Tail of linked list of responses.
473 struct ClientResponseMessage *res_tail;
476 * Context for sending replies.
478 struct GNUNET_CONNECTION_TransmitHandle *th;
484 * Information about a peer that we have forwarded this
485 * request to already.
487 struct UsedTargetEntry
490 * What was the last time we have transmitted this request to this
493 struct GNUNET_TIME_Absolute last_request_time;
496 * How often have we transmitted this request to this peer?
498 unsigned int num_requests;
501 * PID of the target peer.
509 * Doubly-linked list of messages we are performing
510 * due to a pending request.
512 struct PendingMessageList
516 * This is a doubly-linked list of messages on behalf of the same request.
518 struct PendingMessageList *next;
521 * This is a doubly-linked list of messages on behalf of the same request.
523 struct PendingMessageList *prev;
526 * Message this entry represents.
528 struct PendingMessage *pm;
531 * Request this entry belongs to.
533 struct PendingRequest *req;
536 * Peer this message is targeted for.
538 struct ConnectedPeer *target;
544 * Information we keep for each pending request. We should try to
545 * keep this struct as small as possible since its memory consumption
546 * is key to how many requests we can have pending at once.
548 struct PendingRequest
552 * If this request was made by a client, this is our entry in the
553 * client request list; otherwise NULL.
555 struct ClientRequestList *client_request_list;
558 * Entry of peer responsible for this entry (if this request
559 * was made by a peer).
561 struct ConnectedPeer *cp;
564 * If this is a namespace query, pointer to the hash of the public
565 * key of the namespace; otherwise NULL. Pointer will be to the
566 * end of this struct (so no need to free it).
568 const GNUNET_HashCode *namespace;
571 * Bloomfilter we use to filter out replies that we don't care about
572 * (anymore). NULL as long as we are interested in all replies.
574 struct GNUNET_CONTAINER_BloomFilter *bf;
577 * Reference to DHT get operation for this request (or NULL).
579 struct GNUNET_DHT_GetHandle *dht_get;
582 * Context of our GNUNET_CORE_peer_change_preference call.
584 struct ConnectedPeer *pirc;
587 * Hash code of all replies that we have seen so far (only valid
588 * if client is not NULL since we only track replies like this for
591 GNUNET_HashCode *replies_seen;
594 * Node in the heap representing this entry; NULL
595 * if we have no heap node.
597 struct GNUNET_CONTAINER_HeapNode *hnode;
600 * Head of list of messages being performed on behalf of this
603 struct PendingMessageList *pending_head;
606 * Tail of list of messages being performed on behalf of this
609 struct PendingMessageList *pending_tail;
612 * When did we first see this request (form this peer), or, if our
613 * client is initiating, when did we last initiate a search?
615 struct GNUNET_TIME_Absolute start_time;
618 * The query that this request is for.
620 GNUNET_HashCode query;
623 * The task responsible for transmitting queries
626 GNUNET_SCHEDULER_TaskIdentifier task;
629 * (Interned) Peer identifier that identifies a preferred target
632 GNUNET_PEER_Id target_pid;
635 * (Interned) Peer identifiers of peers that have already
636 * received our query for this content.
638 struct UsedTargetEntry *used_targets;
641 * Our entry in the queue (non-NULL while we wait for our
642 * turn to interact with the local database).
644 struct GNUNET_DATASTORE_QueueEntry *qe;
647 * Size of the 'bf' (in bytes).
652 * Desired anonymity level; only valid for requests from a local client.
654 uint32_t anonymity_level;
657 * How many entries in "used_targets" are actually valid?
659 unsigned int used_targets_off;
662 * How long is the "used_targets" array?
664 unsigned int used_targets_size;
667 * Number of results found for this request.
669 unsigned int results_found;
672 * How many entries in "replies_seen" are actually valid?
674 unsigned int replies_seen_off;
677 * How long is the "replies_seen" array?
679 unsigned int replies_seen_size;
682 * Priority with which this request was made. If one of our clients
683 * made the request, then this is the current priority that we are
684 * using when initiating the request. This value is used when
685 * we decide to reward other peers with trust for providing a reply.
690 * Priority points left for us to spend when forwarding this request
693 uint32_t remaining_priority;
696 * Number to mingle hashes for bloom-filter tests with.
701 * TTL with which we saw this request (or, if we initiated, TTL that
702 * we used for the request).
707 * Type of the content that this request is for.
709 enum GNUNET_BLOCK_Type type;
712 * Remove this request after transmission of the current response.
717 * GNUNET_YES if we should not forward this request to other peers.
722 * GNUNET_YES if we should not forward this request to other peers.
730 * Block that is ready for migration to other peers. Actual data is at the end of the block.
732 struct MigrationReadyBlock
736 * This is a doubly-linked list.
738 struct MigrationReadyBlock *next;
741 * This is a doubly-linked list.
743 struct MigrationReadyBlock *prev;
746 * Query for the block.
748 GNUNET_HashCode query;
751 * When does this block expire?
753 struct GNUNET_TIME_Absolute expiration;
756 * Peers we would consider forwarding this
757 * block to. Zero for empty entries.
759 GNUNET_PEER_Id target_list[MIGRATION_LIST_SIZE];
767 * Number of targets already used.
769 unsigned int used_targets;
774 enum GNUNET_BLOCK_Type type;
778 * Identity of this peer.
780 static struct GNUNET_PeerIdentity my_id;
783 * Our connection to the datastore.
785 static struct GNUNET_DATASTORE_Handle *dsh;
790 static struct GNUNET_BLOCK_Context *block_ctx;
793 * Our block configuration.
795 static struct GNUNET_CONFIGURATION_Handle *block_cfg;
800 static const struct GNUNET_CONFIGURATION_Handle *cfg;
803 * Map of peer identifiers to "struct ConnectedPeer" (for that peer).
805 static struct GNUNET_CONTAINER_MultiHashMap *connected_peers;
808 * Map of peer identifiers to "struct PendingRequest" (for that peer).
810 static struct GNUNET_CONTAINER_MultiHashMap *peer_request_map;
813 * Map of query identifiers to "struct PendingRequest" (for that query).
815 static struct GNUNET_CONTAINER_MultiHashMap *query_request_map;
818 * Heap with the request that will expire next at the top. Contains
819 * pointers of type "struct PendingRequest*"; these will *also* be
820 * aliased from the "requests_by_peer" data structures and the
821 * "requests_by_query" table. Note that requests from our clients
822 * don't expire and are thus NOT in the "requests_by_expiration"
823 * (or the "requests_by_peer" tables).
825 static struct GNUNET_CONTAINER_Heap *requests_by_expiration_heap;
828 * Handle for reporting statistics.
830 static struct GNUNET_STATISTICS_Handle *stats;
833 * Linked list of clients we are currently processing requests for.
835 static struct ClientList *client_list;
838 * Pointer to handle to the core service (points to NULL until we've
841 static struct GNUNET_CORE_Handle *core;
844 * Head of linked list of blocks that can be migrated.
846 static struct MigrationReadyBlock *mig_head;
849 * Tail of linked list of blocks that can be migrated.
851 static struct MigrationReadyBlock *mig_tail;
854 * Request to datastore for migration (or NULL).
856 static struct GNUNET_DATASTORE_QueueEntry *mig_qe;
859 * Request to datastore for DHT PUTs (or NULL).
861 static struct GNUNET_DATASTORE_QueueEntry *dht_qe;
864 * Type we will request for the next DHT PUT round from the datastore.
866 static enum GNUNET_BLOCK_Type dht_put_type = GNUNET_BLOCK_TYPE_FS_KBLOCK;
869 * Where do we store trust information?
871 static char *trustDirectory;
874 * ID of task that collects blocks for migration.
876 static GNUNET_SCHEDULER_TaskIdentifier mig_task;
879 * ID of task that collects blocks for DHT PUTs.
881 static GNUNET_SCHEDULER_TaskIdentifier dht_task;
884 * What is the maximum frequency at which we are allowed to
885 * poll the datastore for migration content?
887 static struct GNUNET_TIME_Relative min_migration_delay;
890 * Handle for DHT operations.
892 static struct GNUNET_DHT_Handle *dht_handle;
895 * Size of the doubly-linked list of migration blocks.
897 static unsigned int mig_size;
900 * Are we allowed to migrate content to this peer.
902 static int active_to_migration;
905 * Are we allowed to push out content from this peer.
907 static int active_from_migration;
910 * How many entires with zero anonymity do we currently estimate
911 * to have in the database?
913 static unsigned int zero_anonymity_count_estimate;
916 * Typical priorities we're seeing from other peers right now. Since
917 * most priorities will be zero, this value is the weighted average of
918 * non-zero priorities seen "recently". In order to ensure that new
919 * values do not dramatically change the ratio, values are first
920 * "capped" to a reasonable range (+N of the current value) and then
921 * averaged into the existing value by a ratio of 1:N. Hence
922 * receiving the largest possible priority can still only raise our
923 * "current_priorities" by at most 1.
925 static double current_priorities;
928 * Datastore 'GET' load tracking.
930 static struct GNUNET_LOAD_Value *datastore_get_load;
933 * Datastore 'PUT' load tracking.
935 static struct GNUNET_LOAD_Value *datastore_put_load;
938 * How long do requests typically stay in the routing table?
940 static struct GNUNET_LOAD_Value *rt_entry_lifetime;
943 * How many query messages have we received 'recently' that
944 * have not yet been claimed as cover traffic?
946 static unsigned int cover_query_count;
949 * How many content messages have we received 'recently' that
950 * have not yet been claimed as cover traffic?
952 static unsigned int cover_content_count;
955 * ID of our task that we use to age the cover counters.
957 static GNUNET_SCHEDULER_TaskIdentifier cover_age_task;
960 age_cover_counters (void *cls,
961 const struct GNUNET_SCHEDULER_TaskContext *tc)
963 cover_content_count = (cover_content_count * 15) / 16;
964 cover_query_count = (cover_query_count * 15) / 16;
965 cover_age_task = GNUNET_SCHEDULER_add_delayed (COVER_AGE_FREQUENCY,
971 * We've just now completed a datastore request. Update our
972 * datastore load calculations.
974 * @param start time when the datastore request was issued
977 update_datastore_delays (struct GNUNET_TIME_Absolute start)
979 struct GNUNET_TIME_Relative delay;
981 delay = GNUNET_TIME_absolute_get_duration (start);
982 GNUNET_LOAD_update (datastore_get_load,
988 * Get the filename under which we would store the GNUNET_HELLO_Message
989 * for the given host and protocol.
990 * @return filename of the form DIRECTORY/HOSTID
993 get_trust_filename (const struct GNUNET_PeerIdentity *id)
995 struct GNUNET_CRYPTO_HashAsciiEncoded fil;
998 GNUNET_CRYPTO_hash_to_enc (&id->hashPubKey, &fil);
999 GNUNET_asprintf (&fn, "%s%s%s", trustDirectory, DIR_SEPARATOR_STR, &fil);
1006 * Transmit messages by copying it to the target buffer
1007 * "buf". "buf" will be NULL and "size" zero if the socket was closed
1008 * for writing in the meantime. In that case, do nothing
1009 * (the disconnect or shutdown handler will take care of the rest).
1010 * If we were able to transmit messages and there are still more
1011 * pending, ask core again for further calls to this function.
1013 * @param cls closure, pointer to the 'struct ConnectedPeer*'
1014 * @param size number of bytes available in buf
1015 * @param buf where the callee should write the message
1016 * @return number of bytes written to buf
1019 transmit_to_peer (void *cls,
1020 size_t size, void *buf);
1023 /* ******************* clean up functions ************************ */
1026 * Delete the given migration block.
1028 * @param mb block to delete
1031 delete_migration_block (struct MigrationReadyBlock *mb)
1033 GNUNET_CONTAINER_DLL_remove (mig_head,
1036 GNUNET_PEER_decrement_rcs (mb->target_list,
1037 MIGRATION_LIST_SIZE);
1044 * Compare the distance of two peers to a key.
1047 * @param p1 first peer
1048 * @param p2 second peer
1049 * @return GNUNET_YES if P1 is closer to key than P2
1052 is_closer (const GNUNET_HashCode *key,
1053 const struct GNUNET_PeerIdentity *p1,
1054 const struct GNUNET_PeerIdentity *p2)
1056 return GNUNET_CRYPTO_hash_xorcmp (&p1->hashPubKey,
1063 * Consider migrating content to a given peer.
1065 * @param cls 'struct MigrationReadyBlock*' to select
1066 * targets for (or NULL for none)
1067 * @param key ID of the peer
1068 * @param value 'struct ConnectedPeer' of the peer
1069 * @return GNUNET_YES (always continue iteration)
1072 consider_migration (void *cls,
1073 const GNUNET_HashCode *key,
1076 struct MigrationReadyBlock *mb = cls;
1077 struct ConnectedPeer *cp = value;
1078 struct MigrationReadyBlock *pos;
1079 struct GNUNET_PeerIdentity cppid;
1080 struct GNUNET_PeerIdentity otherpid;
1081 struct GNUNET_PeerIdentity worstpid;
1086 /* consider 'cp' as a migration target for mb */
1087 if (GNUNET_TIME_absolute_get_remaining (cp->migration_blocked).rel_value > 0)
1088 return GNUNET_YES; /* peer has requested no migration! */
1091 GNUNET_PEER_resolve (cp->pid,
1093 repl = MIGRATION_LIST_SIZE;
1094 for (i=0;i<MIGRATION_LIST_SIZE;i++)
1096 if (mb->target_list[i] == 0)
1098 mb->target_list[i] = cp->pid;
1099 GNUNET_PEER_change_rc (mb->target_list[i], 1);
1100 repl = MIGRATION_LIST_SIZE;
1103 GNUNET_PEER_resolve (mb->target_list[i],
1105 if ( (repl == MIGRATION_LIST_SIZE) &&
1106 is_closer (&mb->query,
1111 worstpid = otherpid;
1113 else if ( (repl != MIGRATION_LIST_SIZE) &&
1114 (is_closer (&mb->query,
1119 worstpid = otherpid;
1122 if (repl != MIGRATION_LIST_SIZE)
1124 GNUNET_PEER_change_rc (mb->target_list[repl], -1);
1125 mb->target_list[repl] = cp->pid;
1126 GNUNET_PEER_change_rc (mb->target_list[repl], 1);
1130 /* consider scheduling transmission to cp for content migration */
1131 if (cp->cth != NULL)
1137 for (i=0;i<MIGRATION_LIST_SIZE;i++)
1139 if (cp->pid == pos->target_list[i])
1144 msize = GNUNET_MIN (msize,
1152 return GNUNET_YES; /* no content available */
1154 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1155 "Trying to migrate at least %u bytes to peer `%s'\n",
1159 if (cp->delayed_transmission_request_task != GNUNET_SCHEDULER_NO_TASK)
1161 GNUNET_SCHEDULER_cancel (cp->delayed_transmission_request_task);
1162 cp->delayed_transmission_request_task = GNUNET_SCHEDULER_NO_TASK;
1165 = GNUNET_CORE_notify_transmit_ready (core,
1166 0, GNUNET_TIME_UNIT_FOREVER_REL,
1167 (const struct GNUNET_PeerIdentity*) key,
1168 msize + sizeof (struct PutMessage),
1176 * Task that is run periodically to obtain blocks for content
1180 * @param tc scheduler context (also unused)
1183 gather_migration_blocks (void *cls,
1184 const struct GNUNET_SCHEDULER_TaskContext *tc);
1190 * Task that is run periodically to obtain blocks for DHT PUTs.
1192 * @param cls type of blocks to gather
1193 * @param tc scheduler context (unused)
1196 gather_dht_put_blocks (void *cls,
1197 const struct GNUNET_SCHEDULER_TaskContext *tc);
1201 * If the migration task is not currently running, consider
1202 * (re)scheduling it with the appropriate delay.
1205 consider_migration_gathering ()
1207 struct GNUNET_TIME_Relative delay;
1213 if (mig_task != GNUNET_SCHEDULER_NO_TASK)
1215 delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS,
1217 delay = GNUNET_TIME_relative_divide (delay,
1218 MAX_MIGRATION_QUEUE);
1219 delay = GNUNET_TIME_relative_max (delay,
1220 min_migration_delay);
1221 mig_task = GNUNET_SCHEDULER_add_delayed (delay,
1222 &gather_migration_blocks,
1228 * If the DHT PUT gathering task is not currently running, consider
1229 * (re)scheduling it with the appropriate delay.
1232 consider_dht_put_gathering (void *cls)
1234 struct GNUNET_TIME_Relative delay;
1240 if (dht_task != GNUNET_SCHEDULER_NO_TASK)
1242 if (zero_anonymity_count_estimate > 0)
1244 delay = GNUNET_TIME_relative_divide (GNUNET_DHT_DEFAULT_REPUBLISH_FREQUENCY,
1245 zero_anonymity_count_estimate);
1246 delay = GNUNET_TIME_relative_min (delay,
1251 /* if we have NO zero-anonymity content yet, wait 5 minutes for some to
1252 (hopefully) appear */
1253 delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 5);
1255 dht_task = GNUNET_SCHEDULER_add_delayed (delay,
1256 &gather_dht_put_blocks,
1262 * Process content offered for migration.
1264 * @param cls closure
1265 * @param key key for the content
1266 * @param size number of bytes in data
1267 * @param data content stored
1268 * @param type type of the content
1269 * @param priority priority of the content
1270 * @param anonymity anonymity-level for the content
1271 * @param expiration expiration time for the content
1272 * @param uid unique identifier for the datum;
1273 * maybe 0 if no unique identifier is available
1276 process_migration_content (void *cls,
1277 const GNUNET_HashCode * key,
1280 enum GNUNET_BLOCK_Type type,
1283 struct GNUNET_TIME_Absolute
1284 expiration, uint64_t uid)
1286 struct MigrationReadyBlock *mb;
1291 if (mig_size < MAX_MIGRATION_QUEUE)
1292 consider_migration_gathering ();
1295 if (GNUNET_TIME_absolute_get_remaining (expiration).rel_value <
1296 MIN_MIGRATION_CONTENT_LIFETIME.rel_value)
1298 /* content will expire soon, don't bother */
1299 GNUNET_DATASTORE_get_next (dsh, GNUNET_YES);
1302 if (type == GNUNET_BLOCK_TYPE_FS_ONDEMAND)
1305 GNUNET_FS_handle_on_demand_block (key, size, data,
1306 type, priority, anonymity,
1308 &process_migration_content,
1311 GNUNET_DATASTORE_get_next (dsh, GNUNET_YES);
1316 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1317 "Retrieved block `%s' of type %u for migration\n",
1321 mb = GNUNET_malloc (sizeof (struct MigrationReadyBlock) + size);
1323 mb->expiration = expiration;
1326 memcpy (&mb[1], data, size);
1327 GNUNET_CONTAINER_DLL_insert_after (mig_head,
1332 GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
1333 &consider_migration,
1335 GNUNET_DATASTORE_get_next (dsh, GNUNET_YES);
1340 * Function called upon completion of the DHT PUT operation.
1343 dht_put_continuation (void *cls,
1344 const struct GNUNET_SCHEDULER_TaskContext *tc)
1346 GNUNET_DATASTORE_get_next (dsh, GNUNET_YES);
1351 * Store content in DHT.
1353 * @param cls closure
1354 * @param key key for the content
1355 * @param size number of bytes in data
1356 * @param data content stored
1357 * @param type type of the content
1358 * @param priority priority of the content
1359 * @param anonymity anonymity-level for the content
1360 * @param expiration expiration time for the content
1361 * @param uid unique identifier for the datum;
1362 * maybe 0 if no unique identifier is available
1365 process_dht_put_content (void *cls,
1366 const GNUNET_HashCode * key,
1369 enum GNUNET_BLOCK_Type type,
1372 struct GNUNET_TIME_Absolute
1373 expiration, uint64_t uid)
1375 static unsigned int counter;
1376 static GNUNET_HashCode last_vhash;
1377 static GNUNET_HashCode vhash;
1382 consider_dht_put_gathering (cls);
1385 /* slightly funky code to estimate the total number of values with zero
1386 anonymity from the maximum observed length of a monotonically increasing
1387 sequence of hashes over the contents */
1388 GNUNET_CRYPTO_hash (data, size, &vhash);
1389 if (GNUNET_CRYPTO_hash_cmp (&vhash, &last_vhash) <= 0)
1391 if (zero_anonymity_count_estimate > 0)
1392 zero_anonymity_count_estimate /= 2;
1398 if (zero_anonymity_count_estimate < (1 << counter))
1399 zero_anonymity_count_estimate = (1 << counter);
1401 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1402 "Retrieved block `%s' of type %u for DHT PUT\n",
1406 GNUNET_DHT_put (dht_handle,
1408 DEFAULT_PUT_REPLICATION,
1414 GNUNET_TIME_UNIT_FOREVER_REL,
1415 &dht_put_continuation,
1421 * Task that is run periodically to obtain blocks for content
1425 * @param tc scheduler context (also unused)
1428 gather_migration_blocks (void *cls,
1429 const struct GNUNET_SCHEDULER_TaskContext *tc)
1431 mig_task = GNUNET_SCHEDULER_NO_TASK;
1434 mig_qe = GNUNET_DATASTORE_get_random (dsh, 0, UINT_MAX,
1435 GNUNET_TIME_UNIT_FOREVER_REL,
1436 &process_migration_content, NULL);
1437 GNUNET_assert (mig_qe != NULL);
1443 * Task that is run periodically to obtain blocks for DHT PUTs.
1445 * @param cls type of blocks to gather
1446 * @param tc scheduler context (unused)
1449 gather_dht_put_blocks (void *cls,
1450 const struct GNUNET_SCHEDULER_TaskContext *tc)
1452 dht_task = GNUNET_SCHEDULER_NO_TASK;
1455 if (dht_put_type == GNUNET_BLOCK_TYPE_FS_ONDEMAND)
1456 dht_put_type = GNUNET_BLOCK_TYPE_FS_KBLOCK;
1457 dht_qe = GNUNET_DATASTORE_get_zero_anonymity (dsh, 0, UINT_MAX,
1458 GNUNET_TIME_UNIT_FOREVER_REL,
1460 &process_dht_put_content, NULL);
1461 GNUNET_assert (dht_qe != NULL);
1467 * We're done with a particular message list entry.
1468 * Free all associated resources.
1470 * @param pml entry to destroy
1473 destroy_pending_message_list_entry (struct PendingMessageList *pml)
1475 GNUNET_CONTAINER_DLL_remove (pml->req->pending_head,
1476 pml->req->pending_tail,
1478 GNUNET_CONTAINER_DLL_remove (pml->target->pending_messages_head,
1479 pml->target->pending_messages_tail,
1481 pml->target->pending_requests--;
1482 GNUNET_free (pml->pm);
1488 * Destroy the given pending message (and call the respective
1491 * @param pm message to destroy
1492 * @param tpid id of peer that the message was delivered to, or 0 for none
1495 destroy_pending_message (struct PendingMessage *pm,
1496 GNUNET_PEER_Id tpid)
1498 struct PendingMessageList *pml = pm->pml;
1499 TransmissionContinuation cont;
1503 cont_cls = pm->cont_cls;
1506 GNUNET_assert (pml->pm == pm);
1507 GNUNET_assert ( (tpid == 0) || (tpid == pml->target->pid) );
1508 destroy_pending_message_list_entry (pml);
1515 cont (cont_cls, tpid);
1520 * We're done processing a particular request.
1521 * Free all associated resources.
1523 * @param pr request to destroy
1526 destroy_pending_request (struct PendingRequest *pr)
1528 struct GNUNET_PeerIdentity pid;
1531 if (pr->hnode != NULL)
1533 GNUNET_CONTAINER_heap_remove_node (requests_by_expiration_heap,
1537 if (NULL == pr->client_request_list)
1539 GNUNET_STATISTICS_update (stats,
1540 gettext_noop ("# P2P searches active"),
1546 GNUNET_STATISTICS_update (stats,
1547 gettext_noop ("# client searches active"),
1552 GNUNET_CONTAINER_multihashmap_remove (query_request_map,
1556 GNUNET_LOAD_update (rt_entry_lifetime,
1557 GNUNET_TIME_absolute_get_duration (pr->start_time).rel_value);
1561 GNUNET_DATASTORE_cancel (pr->qe);
1564 if (pr->dht_get != NULL)
1566 GNUNET_DHT_get_stop (pr->dht_get);
1569 if (pr->client_request_list != NULL)
1571 GNUNET_CONTAINER_DLL_remove (pr->client_request_list->client_list->rl_head,
1572 pr->client_request_list->client_list->rl_tail,
1573 pr->client_request_list);
1574 GNUNET_free (pr->client_request_list);
1575 pr->client_request_list = NULL;
1579 GNUNET_PEER_resolve (pr->cp->pid,
1581 (void) GNUNET_CONTAINER_multihashmap_remove (peer_request_map,
1588 GNUNET_CONTAINER_bloomfilter_free (pr->bf);
1591 if (pr->pirc != NULL)
1593 GNUNET_CORE_peer_change_preference_cancel (pr->pirc->irc);
1594 pr->pirc->irc = NULL;
1597 if (pr->replies_seen != NULL)
1599 GNUNET_free (pr->replies_seen);
1600 pr->replies_seen = NULL;
1602 if (pr->task != GNUNET_SCHEDULER_NO_TASK)
1604 GNUNET_SCHEDULER_cancel (pr->task);
1605 pr->task = GNUNET_SCHEDULER_NO_TASK;
1607 while (NULL != pr->pending_head)
1608 destroy_pending_message_list_entry (pr->pending_head);
1609 GNUNET_PEER_change_rc (pr->target_pid, -1);
1610 if (pr->used_targets != NULL)
1612 for (i=0;i<pr->used_targets_off;i++)
1613 GNUNET_PEER_change_rc (pr->used_targets[i].pid, -1);
1614 GNUNET_free (pr->used_targets);
1615 pr->used_targets_off = 0;
1616 pr->used_targets_size = 0;
1617 pr->used_targets = NULL;
1624 * Find latency information in 'atsi'.
1626 * @param atsi performance data
1627 * @return connection latency
1629 static struct GNUNET_TIME_Relative
1630 get_latency (const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1633 return GNUNET_TIME_UNIT_SECONDS;
1634 while ( (ntohl (atsi->type) != GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR) &&
1635 (ntohl (atsi->type) != GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY) )
1637 if (ntohl (atsi->type) == GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR)
1640 /* how can we not have latency data? */
1641 return GNUNET_TIME_UNIT_SECONDS;
1643 return GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
1644 ntohl (atsi->value));
1649 * Method called whenever a given peer connects.
1651 * @param cls closure, not used
1652 * @param peer peer identity this notification is about
1653 * @param atsi performance information
1656 peer_connect_handler (void *cls,
1658 GNUNET_PeerIdentity * peer,
1659 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1661 struct ConnectedPeer *cp;
1662 struct MigrationReadyBlock *pos;
1665 struct GNUNET_TIME_Relative latency;
1667 if (0 == memcmp (&my_id, peer, sizeof (struct GNUNET_PeerIdentity)))
1669 latency = get_latency (atsi);
1670 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
1677 cp = GNUNET_malloc (sizeof (struct ConnectedPeer));
1678 cp->transmission_delay = GNUNET_LOAD_value_init (latency);
1679 cp->pid = GNUNET_PEER_intern (peer);
1681 fn = get_trust_filename (peer);
1682 if ((GNUNET_DISK_file_test (fn) == GNUNET_YES) &&
1683 (sizeof (trust) == GNUNET_DISK_fn_read (fn, &trust, sizeof (trust))))
1684 cp->disk_trust = cp->trust = ntohl (trust);
1687 GNUNET_break (GNUNET_OK ==
1688 GNUNET_CONTAINER_multihashmap_put (connected_peers,
1691 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
1696 (void) consider_migration (pos, &peer->hashPubKey, cp);
1703 * Method called whenever a given peer has a status change.
1705 * @param cls closure
1706 * @param peer peer identity this notification is about
1707 * @param bandwidth_in available amount of inbound bandwidth
1708 * @param bandwidth_out available amount of outbound bandwidth
1709 * @param timeout absolute time when this peer will time out
1710 * unless we see some further activity from it
1711 * @param atsi status information
1714 peer_status_handler (void *cls,
1716 GNUNET_PeerIdentity * peer,
1717 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
1718 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
1719 struct GNUNET_TIME_Absolute timeout,
1720 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1722 struct ConnectedPeer *cp;
1723 struct GNUNET_TIME_Relative latency;
1725 latency = get_latency (atsi);
1726 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
1733 GNUNET_LOAD_value_set_decline (cp->transmission_delay,
1740 * Increase the host credit by a value.
1742 * @param host which peer to change the trust value on
1743 * @param value is the int value by which the
1744 * host credit is to be increased or decreased
1745 * @returns the actual change in trust (positive or negative)
1748 change_host_trust (struct ConnectedPeer *host, int value)
1752 GNUNET_assert (host != NULL);
1755 if (host->trust + value < host->trust)
1757 value = UINT32_MAX - host->trust;
1758 host->trust = UINT32_MAX;
1761 host->trust += value;
1765 if (host->trust < -value)
1767 value = -host->trust;
1771 host->trust += value;
1778 * Write host-trust information to a file - flush the buffer entry!
1781 flush_trust (void *cls,
1782 const GNUNET_HashCode *key,
1785 struct ConnectedPeer *host = value;
1788 struct GNUNET_PeerIdentity pid;
1790 if (host->trust == host->disk_trust)
1791 return GNUNET_OK; /* unchanged */
1792 GNUNET_PEER_resolve (host->pid,
1794 fn = get_trust_filename (&pid);
1795 if (host->trust == 0)
1797 if ((0 != UNLINK (fn)) && (errno != ENOENT))
1798 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING |
1799 GNUNET_ERROR_TYPE_BULK, "unlink", fn);
1803 trust = htonl (host->trust);
1804 if (sizeof(uint32_t) == GNUNET_DISK_fn_write (fn, &trust,
1806 GNUNET_DISK_PERM_USER_READ | GNUNET_DISK_PERM_USER_WRITE
1807 | GNUNET_DISK_PERM_GROUP_READ | GNUNET_DISK_PERM_OTHER_READ))
1808 host->disk_trust = host->trust;
1815 * Call this method periodically to scan data/hosts for new hosts.
1818 cron_flush_trust (void *cls,
1819 const struct GNUNET_SCHEDULER_TaskContext *tc)
1822 if (NULL == connected_peers)
1824 GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
1829 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1831 GNUNET_SCHEDULER_add_delayed (TRUST_FLUSH_FREQ, &cron_flush_trust, NULL);
1836 * Free (each) request made by the peer.
1838 * @param cls closure, points to peer that the request belongs to
1839 * @param key current key code
1840 * @param value value in the hash map
1841 * @return GNUNET_YES (we should continue to iterate)
1844 destroy_request (void *cls,
1845 const GNUNET_HashCode * key,
1848 const struct GNUNET_PeerIdentity * peer = cls;
1849 struct PendingRequest *pr = value;
1851 GNUNET_break (GNUNET_YES ==
1852 GNUNET_CONTAINER_multihashmap_remove (peer_request_map,
1855 destroy_pending_request (pr);
1861 * Method called whenever a peer disconnects.
1863 * @param cls closure, not used
1864 * @param peer peer identity this notification is about
1867 peer_disconnect_handler (void *cls,
1869 GNUNET_PeerIdentity * peer)
1871 struct ConnectedPeer *cp;
1872 struct PendingMessage *pm;
1874 struct MigrationReadyBlock *pos;
1875 struct MigrationReadyBlock *next;
1877 if (0 == memcmp (&my_id, peer, sizeof (struct GNUNET_PeerIdentity)))
1879 GNUNET_CONTAINER_multihashmap_get_multiple (peer_request_map,
1883 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
1887 for (i=0;i<CS2P_SUCCESS_LIST_SIZE;i++)
1889 if (NULL != cp->last_client_replies[i])
1891 GNUNET_SERVER_client_drop (cp->last_client_replies[i]);
1892 cp->last_client_replies[i] = NULL;
1895 GNUNET_break (GNUNET_YES ==
1896 GNUNET_CONTAINER_multihashmap_remove (connected_peers,
1899 if (cp->irc != NULL)
1901 GNUNET_CORE_peer_change_preference_cancel (cp->irc);
1903 cp->pr->pirc = NULL;
1907 /* remove this peer from migration considerations; schedule
1910 while (NULL != (pos = next))
1913 for (i=0;i<MIGRATION_LIST_SIZE;i++)
1915 if (pos->target_list[i] == cp->pid)
1917 GNUNET_PEER_change_rc (pos->target_list[i], -1);
1918 pos->target_list[i] = 0;
1921 if (pos->used_targets >= GNUNET_CONTAINER_multihashmap_size (connected_peers))
1923 delete_migration_block (pos);
1924 consider_migration_gathering ();
1927 GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
1928 &consider_migration,
1931 GNUNET_PEER_change_rc (cp->pid, -1);
1932 GNUNET_PEER_decrement_rcs (cp->last_p2p_replies, P2P_SUCCESS_LIST_SIZE);
1933 if (NULL != cp->cth)
1935 GNUNET_CORE_notify_transmit_ready_cancel (cp->cth);
1938 if (cp->delayed_transmission_request_task != GNUNET_SCHEDULER_NO_TASK)
1940 GNUNET_SCHEDULER_cancel (cp->delayed_transmission_request_task);
1941 cp->delayed_transmission_request_task = GNUNET_SCHEDULER_NO_TASK;
1943 while (NULL != (pm = cp->pending_messages_head))
1944 destroy_pending_message (pm, 0 /* delivery failed */);
1945 GNUNET_LOAD_value_free (cp->transmission_delay);
1946 GNUNET_break (0 == cp->pending_requests);
1952 * Iterator over hash map entries that removes all occurences
1953 * of the given 'client' from the 'last_client_replies' of the
1954 * given connected peer.
1956 * @param cls closure, the 'struct GNUNET_SERVER_Client*' to remove
1957 * @param key current key code (unused)
1958 * @param value value in the hash map (the 'struct ConnectedPeer*' to change)
1959 * @return GNUNET_YES (we should continue to iterate)
1962 remove_client_from_last_client_replies (void *cls,
1963 const GNUNET_HashCode * key,
1966 struct GNUNET_SERVER_Client *client = cls;
1967 struct ConnectedPeer *cp = value;
1970 for (i=0;i<CS2P_SUCCESS_LIST_SIZE;i++)
1972 if (cp->last_client_replies[i] == client)
1974 GNUNET_SERVER_client_drop (cp->last_client_replies[i]);
1975 cp->last_client_replies[i] = NULL;
1983 * A client disconnected. Remove all of its pending queries.
1985 * @param cls closure, NULL
1986 * @param client identification of the client
1989 handle_client_disconnect (void *cls,
1990 struct GNUNET_SERVER_Client
1993 struct ClientList *pos;
1994 struct ClientList *prev;
1995 struct ClientRequestList *rcl;
1996 struct ClientResponseMessage *creply;
2002 while ( (NULL != pos) &&
2003 (pos->client != client) )
2009 return; /* no requests pending for this client */
2010 while (NULL != (rcl = pos->rl_head))
2012 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2013 "Destroying pending request `%s' on disconnect\n",
2014 GNUNET_h2s (&rcl->req->query));
2015 destroy_pending_request (rcl->req);
2018 client_list = pos->next;
2020 prev->next = pos->next;
2021 if (pos->th != NULL)
2023 GNUNET_CONNECTION_notify_transmit_ready_cancel (pos->th);
2026 while (NULL != (creply = pos->res_head))
2028 GNUNET_CONTAINER_DLL_remove (pos->res_head,
2031 GNUNET_free (creply);
2033 GNUNET_SERVER_client_drop (pos->client);
2035 GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
2036 &remove_client_from_last_client_replies,
2042 * Iterator to free peer entries.
2044 * @param cls closure, unused
2045 * @param key current key code
2046 * @param value value in the hash map (peer entry)
2047 * @return GNUNET_YES (we should continue to iterate)
2050 clean_peer (void *cls,
2051 const GNUNET_HashCode * key,
2054 peer_disconnect_handler (NULL, (const struct GNUNET_PeerIdentity*) key);
2060 * Task run during shutdown.
2066 shutdown_task (void *cls,
2067 const struct GNUNET_SCHEDULER_TaskContext *tc)
2071 GNUNET_DATASTORE_cancel (mig_qe);
2076 GNUNET_DATASTORE_cancel (dht_qe);
2079 if (GNUNET_SCHEDULER_NO_TASK != mig_task)
2081 GNUNET_SCHEDULER_cancel (mig_task);
2082 mig_task = GNUNET_SCHEDULER_NO_TASK;
2084 if (GNUNET_SCHEDULER_NO_TASK != dht_task)
2086 GNUNET_SCHEDULER_cancel (dht_task);
2087 dht_task = GNUNET_SCHEDULER_NO_TASK;
2089 while (client_list != NULL)
2090 handle_client_disconnect (NULL,
2091 client_list->client);
2092 cron_flush_trust (NULL, NULL);
2093 GNUNET_assert (NULL != core);
2094 GNUNET_CORE_disconnect (core);
2096 GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
2099 GNUNET_break (0 == GNUNET_CONTAINER_heap_get_size (requests_by_expiration_heap));
2100 GNUNET_CONTAINER_heap_destroy (requests_by_expiration_heap);
2101 requests_by_expiration_heap = 0;
2102 GNUNET_CONTAINER_multihashmap_destroy (connected_peers);
2103 connected_peers = NULL;
2104 GNUNET_break (0 == GNUNET_CONTAINER_multihashmap_size (query_request_map));
2105 GNUNET_CONTAINER_multihashmap_destroy (query_request_map);
2106 query_request_map = NULL;
2107 GNUNET_LOAD_value_free (rt_entry_lifetime);
2108 rt_entry_lifetime = NULL;
2109 GNUNET_break (0 == GNUNET_CONTAINER_multihashmap_size (peer_request_map));
2110 GNUNET_CONTAINER_multihashmap_destroy (peer_request_map);
2111 peer_request_map = NULL;
2114 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
2119 GNUNET_DATASTORE_disconnect (dsh,
2123 while (mig_head != NULL)
2124 delete_migration_block (mig_head);
2125 GNUNET_assert (0 == mig_size);
2126 GNUNET_DHT_disconnect (dht_handle);
2128 GNUNET_LOAD_value_free (datastore_get_load);
2129 datastore_get_load = NULL;
2130 GNUNET_LOAD_value_free (datastore_put_load);
2131 datastore_put_load = NULL;
2132 GNUNET_BLOCK_context_destroy (block_ctx);
2134 GNUNET_CONFIGURATION_destroy (block_cfg);
2137 GNUNET_free_non_null (trustDirectory);
2138 trustDirectory = NULL;
2139 GNUNET_SCHEDULER_cancel (cover_age_task);
2140 cover_age_task = GNUNET_SCHEDULER_NO_TASK;
2144 /* ******************* Utility functions ******************** */
2148 * We've had to delay a request for transmission to core, but now
2149 * we should be ready. Run it.
2151 * @param cls the 'struct ConnectedPeer' for which a request was delayed
2152 * @param tc task context (unused)
2155 delayed_transmission_request (void *cls,
2156 const struct GNUNET_SCHEDULER_TaskContext *tc)
2158 struct ConnectedPeer *cp = cls;
2159 struct GNUNET_PeerIdentity pid;
2160 struct PendingMessage *pm;
2162 pm = cp->pending_messages_head;
2163 cp->delayed_transmission_request_task = GNUNET_SCHEDULER_NO_TASK;
2164 GNUNET_assert (cp->cth == NULL);
2167 GNUNET_PEER_resolve (cp->pid,
2169 cp->last_transmission_request_start = GNUNET_TIME_absolute_get ();
2170 cp->cth = GNUNET_CORE_notify_transmit_ready (core,
2172 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
2181 * Transmit messages by copying it to the target buffer
2182 * "buf". "buf" will be NULL and "size" zero if the socket was closed
2183 * for writing in the meantime. In that case, do nothing
2184 * (the disconnect or shutdown handler will take care of the rest).
2185 * If we were able to transmit messages and there are still more
2186 * pending, ask core again for further calls to this function.
2188 * @param cls closure, pointer to the 'struct ConnectedPeer*'
2189 * @param size number of bytes available in buf
2190 * @param buf where the callee should write the message
2191 * @return number of bytes written to buf
2194 transmit_to_peer (void *cls,
2195 size_t size, void *buf)
2197 struct ConnectedPeer *cp = cls;
2199 struct PendingMessage *pm;
2200 struct PendingMessage *next_pm;
2201 struct GNUNET_TIME_Absolute now;
2202 struct GNUNET_TIME_Relative min_delay;
2203 struct MigrationReadyBlock *mb;
2204 struct MigrationReadyBlock *next;
2205 struct PutMessage migm;
2208 struct GNUNET_PeerIdentity pid;
2214 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2215 "Dropping message, core too busy.\n");
2217 GNUNET_LOAD_update (cp->transmission_delay,
2220 if (NULL != (pm = cp->pending_messages_head))
2222 GNUNET_CONTAINER_DLL_remove (cp->pending_messages_head,
2223 cp->pending_messages_tail,
2225 cp->pending_requests--;
2226 destroy_pending_message (pm, 0);
2228 if (NULL != (pm = cp->pending_messages_head))
2230 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == cp->delayed_transmission_request_task);
2231 min_delay = GNUNET_TIME_absolute_get_remaining (pm->delay_until);
2232 cp->delayed_transmission_request_task
2233 = GNUNET_SCHEDULER_add_delayed (min_delay,
2234 &delayed_transmission_request,
2239 GNUNET_LOAD_update (cp->transmission_delay,
2240 GNUNET_TIME_absolute_get_duration (cp->last_transmission_request_start).rel_value);
2241 now = GNUNET_TIME_absolute_get ();
2243 min_delay = GNUNET_TIME_UNIT_FOREVER_REL;
2244 next_pm = cp->pending_messages_head;
2245 while ( (NULL != (pm = next_pm) ) &&
2246 (pm->msize <= size) )
2249 if (pm->delay_until.abs_value > now.abs_value)
2251 min_delay = GNUNET_TIME_relative_min (min_delay,
2252 GNUNET_TIME_absolute_get_remaining (pm->delay_until));
2255 memcpy (&cbuf[msize], &pm[1], pm->msize);
2258 if (NULL == pm->pml)
2260 GNUNET_CONTAINER_DLL_remove (cp->pending_messages_head,
2261 cp->pending_messages_tail,
2263 cp->pending_requests--;
2265 destroy_pending_message (pm, cp->pid);
2268 min_delay = GNUNET_TIME_UNIT_ZERO;
2269 if (NULL != cp->pending_messages_head)
2271 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == cp->delayed_transmission_request_task);
2272 cp->delayed_transmission_request_task
2273 = GNUNET_SCHEDULER_add_delayed (min_delay,
2274 &delayed_transmission_request,
2279 GNUNET_PEER_resolve (cp->pid,
2282 while (NULL != (mb = next))
2285 for (i=0;i<MIGRATION_LIST_SIZE;i++)
2287 if ( (cp->pid == mb->target_list[i]) &&
2288 (mb->size + sizeof (migm) <= size) )
2290 GNUNET_PEER_change_rc (mb->target_list[i], -1);
2291 mb->target_list[i] = 0;
2293 memset (&migm, 0, sizeof (migm));
2294 migm.header.size = htons (sizeof (migm) + mb->size);
2295 migm.header.type = htons (GNUNET_MESSAGE_TYPE_FS_PUT);
2296 migm.type = htonl (mb->type);
2297 migm.expiration = GNUNET_TIME_absolute_hton (mb->expiration);
2298 memcpy (&cbuf[msize], &migm, sizeof (migm));
2299 msize += sizeof (migm);
2300 size -= sizeof (migm);
2301 memcpy (&cbuf[msize], &mb[1], mb->size);
2305 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2306 "Pushing migration block `%s' (%u bytes) to `%s'\n",
2307 GNUNET_h2s (&mb->query),
2308 (unsigned int) mb->size,
2316 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2317 "Migration block `%s' (%u bytes) is not on migration list for peer `%s'\n",
2318 GNUNET_h2s (&mb->query),
2319 (unsigned int) mb->size,
2324 if ( (mb->used_targets >= MIGRATION_TARGET_COUNT) ||
2325 (mb->used_targets >= GNUNET_CONTAINER_multihashmap_size (connected_peers)) )
2327 delete_migration_block (mb);
2328 consider_migration_gathering ();
2331 consider_migration (NULL,
2336 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2337 "Transmitting %u bytes to peer with PID %u\n",
2338 (unsigned int) msize,
2339 (unsigned int) cp->pid);
2346 * Add a message to the set of pending messages for the given peer.
2348 * @param cp peer to send message to
2349 * @param pm message to queue
2350 * @param pr request on which behalf this message is being queued
2353 add_to_pending_messages_for_peer (struct ConnectedPeer *cp,
2354 struct PendingMessage *pm,
2355 struct PendingRequest *pr)
2357 struct PendingMessage *pos;
2358 struct PendingMessageList *pml;
2359 struct GNUNET_PeerIdentity pid;
2361 GNUNET_assert (pm->next == NULL);
2362 GNUNET_assert (pm->pml == NULL);
2365 pml = GNUNET_malloc (sizeof (struct PendingMessageList));
2370 GNUNET_CONTAINER_DLL_insert (pr->pending_head,
2374 pos = cp->pending_messages_head;
2375 while ( (pos != NULL) &&
2376 (pm->priority < pos->priority) )
2378 GNUNET_CONTAINER_DLL_insert_after (cp->pending_messages_head,
2379 cp->pending_messages_tail,
2382 cp->pending_requests++;
2383 if (cp->pending_requests > MAX_QUEUE_PER_PEER)
2385 GNUNET_STATISTICS_update (stats,
2386 gettext_noop ("# P2P searches discarded (queue length bound)"),
2389 destroy_pending_message (cp->pending_messages_tail, 0);
2391 GNUNET_PEER_resolve (cp->pid, &pid);
2392 if (NULL != cp->cth)
2394 GNUNET_CORE_notify_transmit_ready_cancel (cp->cth);
2397 if (cp->delayed_transmission_request_task != GNUNET_SCHEDULER_NO_TASK)
2399 GNUNET_SCHEDULER_cancel (cp->delayed_transmission_request_task);
2400 cp->delayed_transmission_request_task = GNUNET_SCHEDULER_NO_TASK;
2402 /* need to schedule transmission */
2403 cp->last_transmission_request_start = GNUNET_TIME_absolute_get ();
2404 cp->cth = GNUNET_CORE_notify_transmit_ready (core,
2405 cp->pending_messages_head->priority,
2408 cp->pending_messages_head->msize,
2411 if (cp->cth == NULL)
2414 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2415 "Failed to schedule transmission with core!\n");
2417 GNUNET_STATISTICS_update (stats,
2418 gettext_noop ("# CORE transmission failures"),
2426 * Test if the DATABASE (GET) load on this peer is too high
2427 * to even consider processing the query at
2430 * @return GNUNET_YES if the load is too high to do anything (load high)
2431 * GNUNET_NO to process normally (load normal)
2432 * GNUNET_SYSERR to process for free (load low)
2435 test_get_load_too_high (uint32_t priority)
2439 ld = GNUNET_LOAD_get_load (datastore_get_load);
2441 return GNUNET_SYSERR;
2451 * Test if the DATABASE (PUT) load on this peer is too high
2452 * to even consider processing the query at
2455 * @return GNUNET_YES if the load is too high to do anything (load high)
2456 * GNUNET_NO to process normally (load normal or low)
2459 test_put_load_too_high (uint32_t priority)
2463 if (GNUNET_LOAD_get_average (datastore_put_load) < 50)
2464 return GNUNET_NO; /* very fast */
2465 ld = GNUNET_LOAD_get_load (datastore_put_load);
2466 if (ld < 2.0 * (1 + priority))
2468 GNUNET_STATISTICS_update (stats,
2469 gettext_noop ("# storage requests dropped due to high load"),
2476 /* ******************* Pending Request Refresh Task ******************** */
2481 * We use a random delay to make the timing of requests less
2482 * predictable. This function returns such a random delay. We add a base
2483 * delay of MAX_CORK_DELAY (1s).
2485 * FIXME: make schedule dependent on the specifics of the request?
2486 * Or bandwidth and number of connected peers and load?
2488 * @return random delay to use for some request, between 1s and 1000+TTL_DECREMENT ms
2490 static struct GNUNET_TIME_Relative
2491 get_processing_delay ()
2494 GNUNET_TIME_relative_add (GNUNET_CONSTANTS_MAX_CORK_DELAY,
2495 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
2496 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
2502 * We're processing a GET request from another peer and have decided
2503 * to forward it to other peers. This function is called periodically
2504 * and should forward the request to other peers until we have all
2505 * possible replies. If we have transmitted the *only* reply to
2506 * the initiator we should destroy the pending request. If we have
2507 * many replies in the queue to the initiator, we should delay sending
2508 * out more queries until the reply queue has shrunk some.
2510 * @param cls our "struct ProcessGetContext *"
2514 forward_request_task (void *cls,
2515 const struct GNUNET_SCHEDULER_TaskContext *tc);
2519 * Function called after we either failed or succeeded
2520 * at transmitting a query to a peer.
2522 * @param cls the requests "struct PendingRequest*"
2523 * @param tpid ID of receiving peer, 0 on transmission error
2526 transmit_query_continuation (void *cls,
2527 GNUNET_PEER_Id tpid)
2529 struct PendingRequest *pr = cls;
2532 GNUNET_STATISTICS_update (stats,
2533 gettext_noop ("# queries scheduled for forwarding"),
2539 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2540 "Transmission of request failed, will try again later.\n");
2542 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
2543 pr->task = GNUNET_SCHEDULER_add_delayed (get_processing_delay (),
2544 &forward_request_task,
2549 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2550 "Transmitted query `%s'\n",
2551 GNUNET_h2s (&pr->query));
2553 GNUNET_STATISTICS_update (stats,
2554 gettext_noop ("# queries forwarded"),
2557 for (i=0;i<pr->used_targets_off;i++)
2558 if (pr->used_targets[i].pid == tpid)
2559 break; /* found match! */
2560 if (i == pr->used_targets_off)
2562 /* need to create new entry */
2563 if (pr->used_targets_off == pr->used_targets_size)
2564 GNUNET_array_grow (pr->used_targets,
2565 pr->used_targets_size,
2566 pr->used_targets_size * 2 + 2);
2567 GNUNET_PEER_change_rc (tpid, 1);
2568 pr->used_targets[pr->used_targets_off].pid = tpid;
2569 pr->used_targets[pr->used_targets_off].num_requests = 0;
2570 i = pr->used_targets_off++;
2572 pr->used_targets[i].last_request_time = GNUNET_TIME_absolute_get ();
2573 pr->used_targets[i].num_requests++;
2574 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
2575 pr->task = GNUNET_SCHEDULER_add_delayed (get_processing_delay (),
2576 &forward_request_task,
2582 * How many bytes should a bloomfilter be if we have already seen
2583 * entry_count responses? Note that BLOOMFILTER_K gives us the number
2584 * of bits set per entry. Furthermore, we should not re-size the
2585 * filter too often (to keep it cheap).
2587 * Since other peers will also add entries but not resize the filter,
2588 * we should generally pick a slightly larger size than what the
2589 * strict math would suggest.
2591 * @return must be a power of two and smaller or equal to 2^15.
2594 compute_bloomfilter_size (unsigned int entry_count)
2597 unsigned int ideal = (entry_count * BLOOMFILTER_K) / 4;
2598 uint16_t max = 1 << 15;
2600 if (entry_count > max)
2603 while ((size < max) && (size < ideal))
2612 * Recalculate our bloom filter for filtering replies. This function
2613 * will create a new bloom filter from scratch, so it should only be
2614 * called if we have no bloomfilter at all (and hence can create a
2615 * fresh one of minimal size without problems) OR if our peer is the
2616 * initiator (in which case we may resize to larger than mimimum size).
2618 * @param pr request for which the BF is to be recomputed
2621 refresh_bloomfilter (struct PendingRequest *pr)
2625 GNUNET_HashCode mhash;
2627 nsize = compute_bloomfilter_size (pr->replies_seen_off);
2628 if (nsize == pr->bf_size)
2629 return; /* size not changed */
2631 GNUNET_CONTAINER_bloomfilter_free (pr->bf);
2632 pr->bf_size = nsize;
2633 pr->mingle = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, -1);
2634 pr->bf = GNUNET_CONTAINER_bloomfilter_init (NULL,
2637 for (i=0;i<pr->replies_seen_off;i++)
2639 GNUNET_BLOCK_mingle_hash (&pr->replies_seen[i],
2642 GNUNET_CONTAINER_bloomfilter_add (pr->bf, &mhash);
2648 * Function called after we've tried to reserve a certain amount of
2649 * bandwidth for a reply. Check if we succeeded and if so send our
2652 * @param cls the requests "struct PendingRequest*"
2653 * @param peer identifies the peer
2654 * @param bpm_out set to the current bandwidth limit (sending) for this peer
2655 * @param amount set to the amount that was actually reserved or unreserved
2656 * @param preference current traffic preference for the given peer
2659 target_reservation_cb (void *cls,
2661 GNUNET_PeerIdentity * peer,
2662 struct GNUNET_BANDWIDTH_Value32NBO bpm_out,
2664 uint64_t preference)
2666 struct PendingRequest *pr = cls;
2667 struct ConnectedPeer *cp;
2668 struct PendingMessage *pm;
2669 struct GetMessage *gm;
2670 GNUNET_HashCode *ext;
2678 /* (3) transmit, update ttl/priority */
2679 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
2683 /* Peer must have just left */
2685 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2686 "Selected peer disconnected!\n");
2688 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
2689 pr->task = GNUNET_SCHEDULER_add_delayed (get_processing_delay (),
2690 &forward_request_task,
2698 /* error in communication with core, try again later */
2699 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
2700 pr->task = GNUNET_SCHEDULER_add_delayed (get_processing_delay (),
2701 &forward_request_task,
2705 no_route = GNUNET_NO;
2711 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2712 "Failed to reserve bandwidth for reply (got %d/%u bytes only)!\n",
2716 GNUNET_STATISTICS_update (stats,
2717 gettext_noop ("# reply bandwidth reservation requests failed"),
2720 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
2721 pr->task = GNUNET_SCHEDULER_add_delayed (get_processing_delay (),
2722 &forward_request_task,
2724 return; /* this target round failed */
2726 no_route = GNUNET_YES;
2729 GNUNET_STATISTICS_update (stats,
2730 gettext_noop ("# queries scheduled for forwarding"),
2733 for (i=0;i<pr->used_targets_off;i++)
2734 if (pr->used_targets[i].pid == cp->pid)
2736 GNUNET_STATISTICS_update (stats,
2737 gettext_noop ("# queries retransmitted to same target"),
2743 /* build message and insert message into priority queue */
2745 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2746 "Forwarding request `%s' to `%4s'!\n",
2747 GNUNET_h2s (&pr->query),
2752 if (GNUNET_YES == no_route)
2754 bm |= GET_MESSAGE_BIT_RETURN_TO;
2757 if (pr->namespace != NULL)
2759 bm |= GET_MESSAGE_BIT_SKS_NAMESPACE;
2762 if (pr->target_pid != 0)
2764 bm |= GET_MESSAGE_BIT_TRANSMIT_TO;
2767 msize = sizeof (struct GetMessage) + pr->bf_size + k * sizeof(GNUNET_HashCode);
2768 GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
2769 pm = GNUNET_malloc (sizeof (struct PendingMessage) + msize);
2771 gm = (struct GetMessage*) &pm[1];
2772 gm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_GET);
2773 gm->header.size = htons (msize);
2774 gm->type = htonl (pr->type);
2775 pr->remaining_priority /= 2;
2776 gm->priority = htonl (pr->remaining_priority);
2777 gm->ttl = htonl (pr->ttl);
2778 gm->filter_mutator = htonl(pr->mingle);
2779 gm->hash_bitmap = htonl (bm);
2780 gm->query = pr->query;
2781 ext = (GNUNET_HashCode*) &gm[1];
2783 if (GNUNET_YES == no_route)
2784 GNUNET_PEER_resolve (pr->cp->pid, (struct GNUNET_PeerIdentity*) &ext[k++]);
2785 if (pr->namespace != NULL)
2786 memcpy (&ext[k++], pr->namespace, sizeof (GNUNET_HashCode));
2787 if (pr->target_pid != 0)
2788 GNUNET_PEER_resolve (pr->target_pid, (struct GNUNET_PeerIdentity*) &ext[k++]);
2789 bfdata = (char *) &ext[k];
2791 GNUNET_CONTAINER_bloomfilter_get_raw_data (pr->bf,
2794 pm->cont = &transmit_query_continuation;
2796 cp->last_request_times[(cp->last_request_times_off++) % MAX_QUEUE_PER_PEER] = GNUNET_TIME_absolute_get ();
2797 add_to_pending_messages_for_peer (cp, pm, pr);
2802 * Closure used for "target_peer_select_cb".
2804 struct PeerSelectionContext
2807 * The request for which we are selecting
2810 struct PendingRequest *pr;
2813 * Current "prime" target.
2815 struct GNUNET_PeerIdentity target;
2818 * How much do we like this target?
2820 double target_score;
2823 * Does it make sense to we re-try quickly again?
2831 * Function called for each connected peer to determine
2832 * which one(s) would make good targets for forwarding.
2834 * @param cls closure (struct PeerSelectionContext)
2835 * @param key current key code (peer identity)
2836 * @param value value in the hash map (struct ConnectedPeer)
2837 * @return GNUNET_YES if we should continue to
2842 target_peer_select_cb (void *cls,
2843 const GNUNET_HashCode * key,
2846 struct PeerSelectionContext *psc = cls;
2847 struct ConnectedPeer *cp = value;
2848 struct PendingRequest *pr = psc->pr;
2849 struct GNUNET_TIME_Relative delay;
2854 /* 1) check that this peer is not the initiator */
2858 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2859 "Skipping initiator in forwarding selection\n");
2861 return GNUNET_YES; /* skip */
2863 if (cp->irc != NULL)
2865 psc->fast_retry = GNUNET_YES;
2866 return GNUNET_YES; /* skip: already querying core about this peer for other reasons */
2869 /* 2) check if we have already (recently) forwarded to this peer */
2870 /* 2a) this particular request */
2872 for (i=0;i<pr->used_targets_off;i++)
2873 if (pr->used_targets[i].pid == cp->pid)
2875 pc = pr->used_targets[i].num_requests;
2876 GNUNET_assert (pc > 0);
2877 /* FIXME: make re-enabling a peer independent of how often
2878 this function is called??? */
2879 if (0 != GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
2880 RETRY_PROBABILITY_INV * pc))
2883 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2884 "NOT re-trying query that was previously transmitted %u times\n",
2887 return GNUNET_YES; /* skip */
2894 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2895 "Re-trying query that was previously transmitted %u times to this peer\n",
2899 /* 2b) many other requests to this peer */
2900 delay = GNUNET_TIME_absolute_get_duration (cp->last_request_times[cp->last_request_times_off % MAX_QUEUE_PER_PEER]);
2901 if (delay.rel_value <= cp->avg_delay.rel_value)
2904 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2905 "NOT sending query since we send %u others to this peer in the last %llums\n",
2907 cp->avg_delay.rel_value);
2909 return GNUNET_YES; /* skip */
2912 /* 3) calculate how much we'd like to forward to this peer,
2913 starting with a random value that is strong enough
2914 to at least give any peer a chance sometimes
2915 (compared to the other factors that come later) */
2916 /* 3a) count successful (recent) routes from cp for same source */
2919 score = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
2920 P2P_SUCCESS_LIST_SIZE);
2921 for (i=0;i<P2P_SUCCESS_LIST_SIZE;i++)
2922 if (cp->last_p2p_replies[i] == pr->cp->pid)
2923 score += 1.0; /* likely successful based on hot path */
2927 score = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
2928 CS2P_SUCCESS_LIST_SIZE);
2929 for (i=0;i<CS2P_SUCCESS_LIST_SIZE;i++)
2930 if (cp->last_client_replies[i] == pr->client_request_list->client_list->client)
2931 score += 1.0; /* likely successful based on hot path */
2933 /* 3b) include latency */
2934 if (cp->avg_delay.rel_value < 4 * TTL_DECREMENT)
2935 score += 1.0; /* likely fast based on latency */
2936 /* 3c) include priorities */
2937 if (cp->avg_priority <= pr->remaining_priority / 2.0)
2938 score += 1.0; /* likely successful based on priorities */
2939 /* 3d) penalize for queue size */
2940 score -= (2.0 * cp->pending_requests / (double) MAX_QUEUE_PER_PEER);
2941 /* 3e) include peer proximity */
2942 score -= (2.0 * (GNUNET_CRYPTO_hash_distance_u32 (key,
2943 &pr->query)) / (double) UINT32_MAX);
2944 /* 4) super-bonus for being the known target */
2945 if (pr->target_pid == cp->pid)
2947 /* store best-fit in closure */
2948 score++; /* avoid zero */
2949 if (score > psc->target_score)
2951 psc->target_score = score;
2952 psc->target.hashPubKey = *key;
2955 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2956 "Peer `%s' gets score %f for forwarding query, max is %8f\n",
2966 * The priority level imposes a bound on the maximum
2967 * value for the ttl that can be requested.
2969 * @param ttl_in requested ttl
2970 * @param prio given priority
2971 * @return ttl_in if ttl_in is below the limit,
2972 * otherwise the ttl-limit for the given priority
2975 bound_ttl (int32_t ttl_in, uint32_t prio)
2977 unsigned long long allowed;
2981 allowed = ((unsigned long long) prio) * TTL_DECREMENT / 1000;
2982 if (ttl_in > allowed)
2984 if (allowed >= (1 << 30))
2993 * Iterator called on each result obtained for a DHT
2994 * operation that expects a reply
2996 * @param cls closure
2997 * @param exp when will this value expire
2998 * @param key key of the result
2999 * @param get_path NULL-terminated array of pointers
3000 * to the peers on reverse GET path (or NULL if not recorded)
3001 * @param put_path NULL-terminated array of pointers
3002 * to the peers on the PUT path (or NULL if not recorded)
3003 * @param type type of the result
3004 * @param size number of bytes in data
3005 * @param data pointer to the result data
3008 process_dht_reply (void *cls,
3009 struct GNUNET_TIME_Absolute exp,
3010 const GNUNET_HashCode * key,
3011 const struct GNUNET_PeerIdentity * const *get_path,
3012 const struct GNUNET_PeerIdentity * const *put_path,
3013 enum GNUNET_BLOCK_Type type,
3019 * We're processing a GET request and have decided
3020 * to forward it to other peers. This function is called periodically
3021 * and should forward the request to other peers until we have all
3022 * possible replies. If we have transmitted the *only* reply to
3023 * the initiator we should destroy the pending request. If we have
3024 * many replies in the queue to the initiator, we should delay sending
3025 * out more queries until the reply queue has shrunk some.
3027 * @param cls our "struct ProcessGetContext *"
3031 forward_request_task (void *cls,
3032 const struct GNUNET_SCHEDULER_TaskContext *tc)
3034 struct PendingRequest *pr = cls;
3035 struct PeerSelectionContext psc;
3036 struct ConnectedPeer *cp;
3037 struct GNUNET_TIME_Relative delay;
3039 pr->task = GNUNET_SCHEDULER_NO_TASK;
3040 if (pr->pirc != NULL)
3043 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3044 "Forwarding of query `%s' not attempted due to pending local lookup!\n",
3045 GNUNET_h2s (&pr->query));
3047 return; /* already pending */
3049 if (GNUNET_YES == pr->local_only)
3050 return; /* configured to not do P2P search */
3052 if ( (0 == pr->anonymity_level) &&
3053 (GNUNET_YES != pr->forward_only) &&
3054 (pr->type != GNUNET_BLOCK_TYPE_FS_DBLOCK) &&
3055 (pr->type != GNUNET_BLOCK_TYPE_FS_IBLOCK) )
3057 pr->dht_get = GNUNET_DHT_get_start (dht_handle,
3058 GNUNET_TIME_UNIT_FOREVER_REL,
3061 DEFAULT_GET_REPLICATION,
3066 (pr->namespace != NULL) ? sizeof (GNUNET_HashCode) : 0,
3071 if ( (pr->anonymity_level > 1) &&
3072 (cover_query_count < pr->anonymity_level - 1) )
3074 delay = get_processing_delay ();
3076 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3077 "Not enough cover traffic to forward query `%s', will try again in %llu ms!\n",
3078 GNUNET_h2s (&pr->query),
3081 pr->task = GNUNET_SCHEDULER_add_delayed (delay,
3082 &forward_request_task,
3086 /* consume cover traffic */
3087 if (pr->anonymity_level > 1)
3088 cover_query_count -= pr->anonymity_level - 1;
3090 /* (1) select target */
3092 psc.target_score = -DBL_MAX;
3093 psc.fast_retry = GNUNET_NO;
3094 GNUNET_CONTAINER_multihashmap_iterate (connected_peers,
3095 &target_peer_select_cb,
3097 if (psc.target_score == -DBL_MAX)
3099 if (psc.fast_retry == GNUNET_YES)
3100 delay = GNUNET_TIME_UNIT_MILLISECONDS; /* FIXME: store adaptive fast-retry value in 'pr' */
3102 delay = get_processing_delay ();
3104 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3105 "No peer selected for forwarding of query `%s', will try again in %llu ms!\n",
3106 GNUNET_h2s (&pr->query),
3109 pr->task = GNUNET_SCHEDULER_add_delayed (delay,
3110 &forward_request_task,
3112 return; /* nobody selected */
3114 /* (3) update TTL/priority */
3115 if (pr->client_request_list != NULL)
3117 /* FIXME: use better algorithm!? */
3118 if (0 == GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
3121 /* bound priority we use by priorities we see from other peers
3122 rounded up (must round up so that we can see non-zero
3123 priorities, but round up as little as possible to make it
3124 plausible that we forwarded another peers request) */
3125 if (pr->priority > current_priorities + 1.0)
3126 pr->priority = (uint32_t) current_priorities + 1.0;
3127 pr->ttl = bound_ttl (pr->ttl + TTL_DECREMENT * 2,
3130 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3131 "Trying query `%s' with priority %u and TTL %d.\n",
3132 GNUNET_h2s (&pr->query),
3138 /* (3) reserve reply bandwidth */
3139 if (GNUNET_NO == pr->forward_only)
3141 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
3142 &psc.target.hashPubKey);
3143 GNUNET_assert (NULL != cp);
3144 GNUNET_assert (cp->irc == NULL);
3147 cp->irc = GNUNET_CORE_peer_change_preference (core,
3149 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
3150 GNUNET_BANDWIDTH_value_init (UINT32_MAX),
3153 &target_reservation_cb,
3155 GNUNET_assert (cp->irc != NULL);
3156 cp->inc_preference = 0;
3160 /* force forwarding */
3161 static struct GNUNET_BANDWIDTH_Value32NBO zerobw;
3162 target_reservation_cb (pr, &psc.target,
3168 /* **************************** P2P PUT Handling ************************ */
3172 * Function called after we either failed or succeeded
3173 * at transmitting a reply to a peer.
3175 * @param cls the requests "struct PendingRequest*"
3176 * @param tpid ID of receiving peer, 0 on transmission error
3179 transmit_reply_continuation (void *cls,
3180 GNUNET_PEER_Id tpid)
3182 struct PendingRequest *pr = cls;
3186 case GNUNET_BLOCK_TYPE_FS_DBLOCK:
3187 case GNUNET_BLOCK_TYPE_FS_IBLOCK:
3188 /* only one reply expected, done with the request! */
3189 destroy_pending_request (pr);
3191 case GNUNET_BLOCK_TYPE_ANY:
3192 case GNUNET_BLOCK_TYPE_FS_KBLOCK:
3193 case GNUNET_BLOCK_TYPE_FS_SBLOCK:
3203 * Transmit the given message by copying it to the target buffer
3204 * "buf". "buf" will be NULL and "size" zero if the socket was closed
3205 * for writing in the meantime. In that case, do nothing
3206 * (the disconnect or shutdown handler will take care of the rest).
3207 * If we were able to transmit messages and there are still more
3208 * pending, ask core again for further calls to this function.
3210 * @param cls closure, pointer to the 'struct ClientList*'
3211 * @param size number of bytes available in buf
3212 * @param buf where the callee should write the message
3213 * @return number of bytes written to buf
3216 transmit_to_client (void *cls,
3217 size_t size, void *buf)
3219 struct ClientList *cl = cls;
3221 struct ClientResponseMessage *creply;
3228 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3229 "Not sending reply, client communication problem.\n");
3234 while ( (NULL != (creply = cl->res_head) ) &&
3235 (creply->msize <= size) )
3237 memcpy (&cbuf[msize], &creply[1], creply->msize);
3238 msize += creply->msize;
3239 size -= creply->msize;
3240 GNUNET_CONTAINER_DLL_remove (cl->res_head,
3243 GNUNET_free (creply);
3246 cl->th = GNUNET_SERVER_notify_transmit_ready (cl->client,
3248 GNUNET_TIME_UNIT_FOREVER_REL,
3249 &transmit_to_client,
3252 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3253 "Transmitted %u bytes to client\n",
3254 (unsigned int) msize);
3261 * Closure for "process_reply" function.
3263 struct ProcessReplyClosure
3266 * The data for the reply.
3271 * Who gave us this reply? NULL for local host (or DHT)
3273 struct ConnectedPeer *sender;
3276 * When the reply expires.
3278 struct GNUNET_TIME_Absolute expiration;
3286 * Type of the block.
3288 enum GNUNET_BLOCK_Type type;
3291 * How much was this reply worth to us?
3296 * Anonymity requirements for this reply.
3298 uint32_t anonymity_level;
3301 * Evaluation result (returned).
3303 enum GNUNET_BLOCK_EvaluationResult eval;
3306 * Did we finish processing the associated request?
3311 * Did we find a matching request?
3318 * We have received a reply; handle it!
3320 * @param cls response (struct ProcessReplyClosure)
3321 * @param key our query
3322 * @param value value in the hash map (info about the query)
3323 * @return GNUNET_YES (we should continue to iterate)
3326 process_reply (void *cls,
3327 const GNUNET_HashCode * key,
3330 struct ProcessReplyClosure *prq = cls;
3331 struct PendingRequest *pr = value;
3332 struct PendingMessage *reply;
3333 struct ClientResponseMessage *creply;
3334 struct ClientList *cl;
3335 struct PutMessage *pm;
3336 struct ConnectedPeer *cp;
3337 struct GNUNET_TIME_Relative cur_delay;
3339 struct GNUNET_TIME_Relative art_delay;
3344 if (NULL == pr->client_request_list)
3346 /* reply will go over the network, check for cover traffic */
3347 if ( (prq->anonymity_level > 1) &&
3348 (cover_content_count < prq->anonymity_level - 1) )
3350 /* insufficient cover traffic, skip */
3351 GNUNET_STATISTICS_update (stats,
3352 gettext_noop ("# replies suppressed due to lack of cover traffic"),
3357 if (prq->anonymity_level > 1)
3358 cover_content_count -= prq->anonymity_level - 1;
3361 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3362 "Matched result (type %u) for query `%s' with pending request\n",
3363 (unsigned int) prq->type,
3366 GNUNET_STATISTICS_update (stats,
3367 gettext_noop ("# replies received and matched"),
3370 if (prq->sender != NULL)
3372 for (i=0;i<pr->used_targets_off;i++)
3373 if (pr->used_targets[i].pid == prq->sender->pid)
3375 if (i < pr->used_targets_off)
3377 cur_delay = GNUNET_TIME_absolute_get_duration (pr->used_targets[i].last_request_time);
3378 prq->sender->avg_delay.rel_value
3379 = (prq->sender->avg_delay.rel_value *
3380 (RUNAVG_DELAY_N - 1) + cur_delay.rel_value) / RUNAVG_DELAY_N;
3381 prq->sender->avg_priority
3382 = (prq->sender->avg_priority *
3383 (RUNAVG_DELAY_N - 1) + pr->priority) / (double) RUNAVG_DELAY_N;
3387 GNUNET_PEER_change_rc (prq->sender->last_p2p_replies
3388 [prq->sender->last_p2p_replies_woff % P2P_SUCCESS_LIST_SIZE],
3390 GNUNET_PEER_change_rc (pr->cp->pid, 1);
3391 prq->sender->last_p2p_replies
3392 [(prq->sender->last_p2p_replies_woff++) % P2P_SUCCESS_LIST_SIZE]
3397 if (NULL != prq->sender->last_client_replies
3398 [(prq->sender->last_client_replies_woff) % CS2P_SUCCESS_LIST_SIZE])
3399 GNUNET_SERVER_client_drop (prq->sender->last_client_replies
3400 [(prq->sender->last_client_replies_woff) % CS2P_SUCCESS_LIST_SIZE]);
3401 prq->sender->last_client_replies
3402 [(prq->sender->last_client_replies_woff++) % CS2P_SUCCESS_LIST_SIZE]
3403 = pr->client_request_list->client_list->client;
3404 GNUNET_SERVER_client_keep (pr->client_request_list->client_list->client);
3407 prq->eval = GNUNET_BLOCK_evaluate (block_ctx,
3412 pr->namespace, (pr->namespace != NULL) ? sizeof (GNUNET_HashCode) : 0,
3417 case GNUNET_BLOCK_EVALUATION_OK_MORE:
3419 case GNUNET_BLOCK_EVALUATION_OK_LAST:
3420 while (NULL != pr->pending_head)
3421 destroy_pending_message_list_entry (pr->pending_head);
3424 if (pr->client_request_list != NULL)
3425 GNUNET_SERVER_receive_done (pr->client_request_list->client_list->client,
3427 GNUNET_DATASTORE_cancel (pr->qe);
3430 pr->do_remove = GNUNET_YES;
3431 if (pr->task != GNUNET_SCHEDULER_NO_TASK)
3433 GNUNET_SCHEDULER_cancel (pr->task);
3434 pr->task = GNUNET_SCHEDULER_NO_TASK;
3436 GNUNET_break (GNUNET_YES ==
3437 GNUNET_CONTAINER_multihashmap_remove (query_request_map,
3440 GNUNET_LOAD_update (rt_entry_lifetime,
3441 GNUNET_TIME_absolute_get_duration (pr->start_time).rel_value);
3443 case GNUNET_BLOCK_EVALUATION_OK_DUPLICATE:
3444 GNUNET_STATISTICS_update (stats,
3445 gettext_noop ("# duplicate replies discarded (bloomfilter)"),
3449 /* GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3450 "Duplicate response `%s', discarding.\n",
3451 GNUNET_h2s (&mhash));*/
3453 return GNUNET_YES; /* duplicate */
3454 case GNUNET_BLOCK_EVALUATION_RESULT_INVALID:
3455 return GNUNET_YES; /* wrong namespace */
3456 case GNUNET_BLOCK_EVALUATION_REQUEST_VALID:
3459 case GNUNET_BLOCK_EVALUATION_REQUEST_INVALID:
3462 case GNUNET_BLOCK_EVALUATION_TYPE_NOT_SUPPORTED:
3463 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3464 _("Unsupported block type %u\n"),
3468 if (pr->client_request_list != NULL)
3470 if (pr->replies_seen_size == pr->replies_seen_off)
3471 GNUNET_array_grow (pr->replies_seen,
3472 pr->replies_seen_size,
3473 pr->replies_seen_size * 2 + 4);
3474 GNUNET_CRYPTO_hash (prq->data,
3476 &pr->replies_seen[pr->replies_seen_off++]);
3477 refresh_bloomfilter (pr);
3479 if (NULL == prq->sender)
3482 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3483 "Found result for query `%s' in local datastore\n",
3486 GNUNET_STATISTICS_update (stats,
3487 gettext_noop ("# results found locally"),
3491 prq->priority += pr->remaining_priority;
3492 pr->remaining_priority = 0;
3493 pr->results_found++;
3494 prq->request_found = GNUNET_YES;
3495 if (NULL != pr->client_request_list)
3497 GNUNET_STATISTICS_update (stats,
3498 gettext_noop ("# replies received for local clients"),
3501 cl = pr->client_request_list->client_list;
3502 msize = sizeof (struct PutMessage) + prq->size;
3503 creply = GNUNET_malloc (msize + sizeof (struct ClientResponseMessage));
3504 creply->msize = msize;
3505 creply->client_list = cl;
3506 GNUNET_CONTAINER_DLL_insert_after (cl->res_head,
3510 pm = (struct PutMessage*) &creply[1];
3511 pm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_PUT);
3512 pm->header.size = htons (msize);
3513 pm->type = htonl (prq->type);
3514 pm->expiration = GNUNET_TIME_absolute_hton (prq->expiration);
3515 memcpy (&pm[1], prq->data, prq->size);
3519 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3520 "Transmitting result for query `%s' to client\n",
3523 cl->th = GNUNET_SERVER_notify_transmit_ready (cl->client,
3525 GNUNET_TIME_UNIT_FOREVER_REL,
3526 &transmit_to_client,
3529 GNUNET_break (cl->th != NULL);
3532 prq->finished = GNUNET_YES;
3533 destroy_pending_request (pr);
3540 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3541 "Transmitting result for query `%s' to other peer (PID=%u)\n",
3543 (unsigned int) cp->pid);
3545 GNUNET_STATISTICS_update (stats,
3546 gettext_noop ("# replies received for other peers"),
3549 msize = sizeof (struct PutMessage) + prq->size;
3550 reply = GNUNET_malloc (msize + sizeof (struct PendingMessage));
3551 reply->cont = &transmit_reply_continuation;
3552 reply->cont_cls = pr;
3554 art_delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
3555 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
3558 = GNUNET_TIME_relative_to_absolute (art_delay);
3559 GNUNET_STATISTICS_update (stats,
3560 gettext_noop ("cummulative artificial delay introduced (ms)"),
3561 art_delay.abs_value,
3564 reply->msize = msize;
3565 reply->priority = UINT32_MAX; /* send replies first! */
3566 pm = (struct PutMessage*) &reply[1];
3567 pm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_PUT);
3568 pm->header.size = htons (msize);
3569 pm->type = htonl (prq->type);
3570 pm->expiration = GNUNET_TIME_absolute_hton (prq->expiration);
3571 memcpy (&pm[1], prq->data, prq->size);
3572 add_to_pending_messages_for_peer (cp, reply, pr);
3579 * Iterator called on each result obtained for a DHT
3580 * operation that expects a reply
3582 * @param cls closure
3583 * @param exp when will this value expire
3584 * @param key key of the result
3585 * @param get_path NULL-terminated array of pointers
3586 * to the peers on reverse GET path (or NULL if not recorded)
3587 * @param put_path NULL-terminated array of pointers
3588 * to the peers on the PUT path (or NULL if not recorded)
3589 * @param type type of the result
3590 * @param size number of bytes in data
3591 * @param data pointer to the result data
3594 process_dht_reply (void *cls,
3595 struct GNUNET_TIME_Absolute exp,
3596 const GNUNET_HashCode * key,
3597 const struct GNUNET_PeerIdentity * const *get_path,
3598 const struct GNUNET_PeerIdentity * const *put_path,
3599 enum GNUNET_BLOCK_Type type,
3603 struct PendingRequest *pr = cls;
3604 struct ProcessReplyClosure prq;
3606 memset (&prq, 0, sizeof (prq));
3608 prq.expiration = exp;
3611 process_reply (&prq, key, pr);
3617 * Continuation called to notify client about result of the
3620 * @param cls closure
3621 * @param success GNUNET_SYSERR on failure
3622 * @param msg NULL on success, otherwise an error message
3625 put_migration_continuation (void *cls,
3629 struct GNUNET_TIME_Absolute *start = cls;
3630 struct GNUNET_TIME_Relative delay;
3632 delay = GNUNET_TIME_absolute_get_duration (*start);
3633 GNUNET_free (start);
3634 GNUNET_LOAD_update (datastore_put_load,
3636 if (GNUNET_OK == success)
3638 GNUNET_STATISTICS_update (stats,
3639 gettext_noop ("# datastore 'put' failures"),
3646 * Handle P2P "PUT" message.
3648 * @param cls closure, always NULL
3649 * @param other the other peer involved (sender or receiver, NULL
3650 * for loopback messages where we are both sender and receiver)
3651 * @param message the actual message
3652 * @param atsi performance information
3653 * @return GNUNET_OK to keep the connection open,
3654 * GNUNET_SYSERR to close it (signal serious error)
3657 handle_p2p_put (void *cls,
3658 const struct GNUNET_PeerIdentity *other,
3659 const struct GNUNET_MessageHeader *message,
3660 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
3662 const struct PutMessage *put;
3665 enum GNUNET_BLOCK_Type type;
3666 struct GNUNET_TIME_Absolute expiration;
3667 GNUNET_HashCode query;
3668 struct ProcessReplyClosure prq;
3669 struct GNUNET_TIME_Absolute *start;
3670 struct GNUNET_TIME_Relative block_time;
3672 struct ConnectedPeer *cp;
3673 struct PendingMessage *pm;
3674 struct MigrationStopMessage *msm;
3676 msize = ntohs (message->size);
3677 if (msize < sizeof (struct PutMessage))
3680 return GNUNET_SYSERR;
3682 put = (const struct PutMessage*) message;
3683 dsize = msize - sizeof (struct PutMessage);
3684 type = ntohl (put->type);
3685 expiration = GNUNET_TIME_absolute_ntoh (put->expiration);
3687 if (type == GNUNET_BLOCK_TYPE_FS_ONDEMAND)
3688 return GNUNET_SYSERR;
3690 GNUNET_BLOCK_get_key (block_ctx,
3696 GNUNET_break_op (0);
3697 return GNUNET_SYSERR;
3699 cover_content_count++;
3701 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3702 "Received result for query `%s' from peer `%4s'\n",
3703 GNUNET_h2s (&query),
3704 GNUNET_i2s (other));
3706 GNUNET_STATISTICS_update (stats,
3707 gettext_noop ("# replies received (overall)"),
3710 /* now, lookup 'query' */
3711 prq.data = (const void*) &put[1];
3713 prq.sender = GNUNET_CONTAINER_multihashmap_get (connected_peers,
3714 &other->hashPubKey);
3719 prq.expiration = expiration;
3721 prq.anonymity_level = 1;
3722 prq.finished = GNUNET_NO;
3723 prq.request_found = GNUNET_NO;
3724 GNUNET_CONTAINER_multihashmap_get_multiple (query_request_map,
3728 if (prq.sender != NULL)
3730 prq.sender->inc_preference += CONTENT_BANDWIDTH_VALUE + 1000 * prq.priority;
3731 change_host_trust (prq.sender, prq.priority);
3733 if ( (GNUNET_YES == active_to_migration) &&
3734 (GNUNET_NO == test_put_load_too_high (prq.priority)) )
3737 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3738 "Replicating result for query `%s' with priority %u\n",
3739 GNUNET_h2s (&query),
3742 start = GNUNET_malloc (sizeof (struct GNUNET_TIME_Absolute));
3743 *start = GNUNET_TIME_absolute_get ();
3744 GNUNET_DATASTORE_put (dsh,
3745 0, &query, dsize, &put[1],
3746 type, prq.priority, 1 /* anonymity */,
3748 1 + prq.priority, MAX_DATASTORE_QUEUE,
3749 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
3750 &put_migration_continuation,
3753 putl = GNUNET_LOAD_get_load (datastore_put_load);
3754 if ( (NULL != (cp = prq.sender)) &&
3755 (GNUNET_NO == prq.request_found) &&
3756 ( (GNUNET_YES != active_to_migration) ||
3757 (putl > 2.5 * (1 + prq.priority)) ) )
3759 if (GNUNET_TIME_absolute_get_duration (cp->last_migration_block).rel_value < 5000)
3760 return GNUNET_OK; /* already blocked */
3761 /* We're too busy; send MigrationStop message! */
3762 if (GNUNET_YES != active_to_migration)
3763 putl = 1.0 + GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 5);
3764 block_time = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
3765 5000 + GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
3766 (unsigned int) (60000 * putl * putl)));
3768 cp->last_migration_block = GNUNET_TIME_relative_to_absolute (block_time);
3769 pm = GNUNET_malloc (sizeof (struct PendingMessage) +
3770 sizeof (struct MigrationStopMessage));
3771 pm->msize = sizeof (struct MigrationStopMessage);
3772 pm->priority = UINT32_MAX;
3773 msm = (struct MigrationStopMessage*) &pm[1];
3774 msm->header.size = htons (sizeof (struct MigrationStopMessage));
3775 msm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_MIGRATION_STOP);
3776 msm->duration = GNUNET_TIME_relative_hton (block_time);
3777 add_to_pending_messages_for_peer (cp,
3786 * Handle P2P "MIGRATION_STOP" message.
3788 * @param cls closure, always NULL
3789 * @param other the other peer involved (sender or receiver, NULL
3790 * for loopback messages where we are both sender and receiver)
3791 * @param message the actual message
3792 * @param atsi performance information
3793 * @return GNUNET_OK to keep the connection open,
3794 * GNUNET_SYSERR to close it (signal serious error)
3797 handle_p2p_migration_stop (void *cls,
3798 const struct GNUNET_PeerIdentity *other,
3799 const struct GNUNET_MessageHeader *message,
3800 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
3802 struct ConnectedPeer *cp;
3803 const struct MigrationStopMessage *msm;
3805 msm = (const struct MigrationStopMessage*) message;
3806 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
3807 &other->hashPubKey);
3813 cp->migration_blocked = GNUNET_TIME_relative_to_absolute (GNUNET_TIME_relative_ntoh (msm->duration));
3819 /* **************************** P2P GET Handling ************************ */
3823 * Closure for 'check_duplicate_request_{peer,client}'.
3825 struct CheckDuplicateRequestClosure
3828 * The new request we should check if it already exists.
3830 const struct PendingRequest *pr;
3833 * Existing request found by the checker, NULL if none.
3835 struct PendingRequest *have;
3840 * Iterator over entries in the 'query_request_map' that
3841 * tries to see if we have the same request pending from
3842 * the same client already.
3844 * @param cls closure (our 'struct CheckDuplicateRequestClosure')
3845 * @param key current key code (query, ignored, must match)
3846 * @param value value in the hash map (a 'struct PendingRequest'
3847 * that already exists)
3848 * @return GNUNET_YES if we should continue to
3849 * iterate (no match yet)
3850 * GNUNET_NO if not (match found).
3853 check_duplicate_request_client (void *cls,
3854 const GNUNET_HashCode * key,
3857 struct CheckDuplicateRequestClosure *cdc = cls;
3858 struct PendingRequest *have = value;
3860 if (have->client_request_list == NULL)
3862 if ( (cdc->pr->client_request_list->client_list->client == have->client_request_list->client_list->client) &&
3873 * We're processing (local) results for a search request
3874 * from another peer. Pass applicable results to the
3875 * peer and if we are done either clean up (operation
3876 * complete) or forward to other peers (more results possible).
3878 * @param cls our closure (struct LocalGetContext)
3879 * @param key key for the content
3880 * @param size number of bytes in data
3881 * @param data content stored
3882 * @param type type of the content
3883 * @param priority priority of the content
3884 * @param anonymity anonymity-level for the content
3885 * @param expiration expiration time for the content
3886 * @param uid unique identifier for the datum;
3887 * maybe 0 if no unique identifier is available
3890 process_local_reply (void *cls,
3891 const GNUNET_HashCode * key,
3894 enum GNUNET_BLOCK_Type type,
3897 struct GNUNET_TIME_Absolute
3901 struct PendingRequest *pr = cls;
3902 struct ProcessReplyClosure prq;
3903 struct CheckDuplicateRequestClosure cdrc;
3904 GNUNET_HashCode query;
3905 unsigned int old_rf;
3910 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3911 "Done processing local replies, forwarding request to other peers.\n");
3914 if (pr->client_request_list != NULL)
3916 GNUNET_SERVER_receive_done (pr->client_request_list->client_list->client,
3918 /* Figure out if this is a duplicate request and possibly
3919 merge 'struct PendingRequest' entries */
3922 GNUNET_CONTAINER_multihashmap_get_multiple (query_request_map,
3924 &check_duplicate_request_client,
3926 if (cdrc.have != NULL)
3929 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3930 "Received request for block `%s' twice from client, will only request once.\n",
3931 GNUNET_h2s (&pr->query));
3934 destroy_pending_request (pr);
3938 if (pr->local_only == GNUNET_YES)
3940 destroy_pending_request (pr);
3943 /* no more results */
3944 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
3945 pr->task = GNUNET_SCHEDULER_add_now (&forward_request_task,
3950 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3951 "New local response to `%s' of type %u.\n",
3955 if (type == GNUNET_BLOCK_TYPE_FS_ONDEMAND)
3958 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3959 "Found ONDEMAND block, performing on-demand encoding\n");
3961 GNUNET_STATISTICS_update (stats,
3962 gettext_noop ("# on-demand blocks matched requests"),
3966 GNUNET_FS_handle_on_demand_block (key, size, data, type, priority,
3967 anonymity, expiration, uid,
3968 &process_local_reply,
3972 GNUNET_DATASTORE_get_next (dsh, GNUNET_YES);
3976 old_rf = pr->results_found;
3977 memset (&prq, 0, sizeof (prq));
3979 prq.expiration = expiration;
3982 GNUNET_BLOCK_get_key (block_ctx,
3989 GNUNET_DATASTORE_remove (dsh,
3993 GNUNET_TIME_UNIT_FOREVER_REL,
3995 GNUNET_DATASTORE_get_next (dsh, GNUNET_YES);
3999 prq.priority = priority;
4000 prq.finished = GNUNET_NO;
4001 prq.request_found = GNUNET_NO;
4002 prq.anonymity_level = anonymity;
4003 if ( (old_rf == 0) &&
4004 (pr->results_found == 0) )
4005 update_datastore_delays (pr->start_time);
4006 process_reply (&prq, key, pr);
4007 if (prq.finished == GNUNET_YES)
4010 return; /* done here */
4011 if (prq.eval == GNUNET_BLOCK_EVALUATION_OK_LAST)
4013 pr->local_only = GNUNET_YES; /* do not forward */
4014 GNUNET_DATASTORE_get_next (dsh, GNUNET_NO);
4017 if ( (pr->client_request_list == NULL) &&
4018 ( (GNUNET_YES == test_get_load_too_high (0)) ||
4019 (pr->results_found > 5 + 2 * pr->priority) ) )
4022 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4023 "Load too high, done with request\n");
4025 GNUNET_STATISTICS_update (stats,
4026 gettext_noop ("# processing result set cut short due to load"),
4029 GNUNET_DATASTORE_get_next (dsh, GNUNET_NO);
4032 GNUNET_DATASTORE_get_next (dsh, GNUNET_YES);
4037 * We've received a request with the specified priority. Bound it
4038 * according to how much we trust the given peer.
4040 * @param prio_in requested priority
4041 * @param cp the peer making the request
4042 * @return effective priority
4045 bound_priority (uint32_t prio_in,
4046 struct ConnectedPeer *cp)
4048 #define N ((double)128.0)
4053 ld = test_get_load_too_high (0);
4054 if (ld == GNUNET_SYSERR)
4056 GNUNET_STATISTICS_update (stats,
4057 gettext_noop ("# requests done for free (low load)"),
4060 return 0; /* excess resources */
4062 if (prio_in > INT32_MAX)
4063 prio_in = INT32_MAX;
4064 ret = - change_host_trust (cp, - (int) prio_in);
4067 if (ret > current_priorities + N)
4068 rret = current_priorities + N;
4072 = (current_priorities * (N-1) + rret)/N;
4074 if ( (ld == GNUNET_YES) && (ret > 0) )
4076 /* try with charging */
4077 ld = test_get_load_too_high (ret);
4079 if (ld == GNUNET_YES)
4081 GNUNET_STATISTICS_update (stats,
4082 gettext_noop ("# request dropped, priority insufficient"),
4086 change_host_trust (cp, (int) ret);
4087 return -1; /* not enough resources */
4091 GNUNET_STATISTICS_update (stats,
4092 gettext_noop ("# requests done for a price (normal load)"),
4102 * Iterator over entries in the 'query_request_map' that
4103 * tries to see if we have the same request pending from
4104 * the same peer already.
4106 * @param cls closure (our 'struct CheckDuplicateRequestClosure')
4107 * @param key current key code (query, ignored, must match)
4108 * @param value value in the hash map (a 'struct PendingRequest'
4109 * that already exists)
4110 * @return GNUNET_YES if we should continue to
4111 * iterate (no match yet)
4112 * GNUNET_NO if not (match found).
4115 check_duplicate_request_peer (void *cls,
4116 const GNUNET_HashCode * key,
4119 struct CheckDuplicateRequestClosure *cdc = cls;
4120 struct PendingRequest *have = value;
4122 if (cdc->pr->target_pid == have->target_pid)
4132 * Handle P2P "GET" request.
4134 * @param cls closure, always NULL
4135 * @param other the other peer involved (sender or receiver, NULL
4136 * for loopback messages where we are both sender and receiver)
4137 * @param message the actual message
4138 * @param atsi performance information
4139 * @return GNUNET_OK to keep the connection open,
4140 * GNUNET_SYSERR to close it (signal serious error)
4143 handle_p2p_get (void *cls,
4144 const struct GNUNET_PeerIdentity *other,
4145 const struct GNUNET_MessageHeader *message,
4146 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
4148 struct PendingRequest *pr;
4149 struct ConnectedPeer *cp;
4150 struct ConnectedPeer *cps;
4151 struct CheckDuplicateRequestClosure cdc;
4152 struct GNUNET_TIME_Relative timeout;
4154 const struct GetMessage *gm;
4156 const GNUNET_HashCode *opt;
4159 uint32_t ttl_decrement;
4161 enum GNUNET_BLOCK_Type type;
4164 msize = ntohs(message->size);
4165 if (msize < sizeof (struct GetMessage))
4167 GNUNET_break_op (0);
4168 return GNUNET_SYSERR;
4170 gm = (const struct GetMessage*) message;
4172 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4173 "Received request for `%s'\n",
4174 GNUNET_h2s (&gm->query));
4176 type = ntohl (gm->type);
4177 bm = ntohl (gm->hash_bitmap);
4185 if (msize < sizeof (struct GetMessage) + bits * sizeof (GNUNET_HashCode))
4187 GNUNET_break_op (0);
4188 return GNUNET_SYSERR;
4190 opt = (const GNUNET_HashCode*) &gm[1];
4191 bfsize = msize - sizeof (struct GetMessage) - bits * sizeof (GNUNET_HashCode);
4192 /* bfsize must be power of 2, check! */
4193 if (0 != ( (bfsize - 1) & bfsize))
4195 GNUNET_break_op (0);
4196 return GNUNET_SYSERR;
4198 cover_query_count++;
4199 bm = ntohl (gm->hash_bitmap);
4201 cps = GNUNET_CONTAINER_multihashmap_get (connected_peers,
4202 &other->hashPubKey);
4205 /* peer must have just disconnected */
4206 GNUNET_STATISTICS_update (stats,
4207 gettext_noop ("# requests dropped due to initiator not being connected"),
4210 return GNUNET_SYSERR;
4212 if (0 != (bm & GET_MESSAGE_BIT_RETURN_TO))
4213 cp = GNUNET_CONTAINER_multihashmap_get (connected_peers,
4220 if (0 != (bm & GET_MESSAGE_BIT_RETURN_TO))
4221 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4222 "Failed to find RETURN-TO peer `%4s' in connection set. Dropping query.\n",
4223 GNUNET_i2s ((const struct GNUNET_PeerIdentity*) &opt[bits-1]));
4226 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4227 "Failed to find peer `%4s' in connection set. Dropping query.\n",
4228 GNUNET_i2s (other));
4230 GNUNET_STATISTICS_update (stats,
4231 gettext_noop ("# requests dropped due to missing reverse route"),
4234 /* FIXME: try connect? */
4237 /* note that we can really only check load here since otherwise
4238 peers could find out that we are overloaded by not being
4239 disconnected after sending us a malformed query... */
4240 priority = bound_priority (ntohl (gm->priority), cps);
4244 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4245 "Dropping query from `%s', this peer is too busy.\n",
4246 GNUNET_i2s (other));
4251 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4252 "Received request for `%s' of type %u from peer `%4s' with flags %u\n",
4253 GNUNET_h2s (&gm->query),
4254 (unsigned int) type,
4258 have_ns = (0 != (bm & GET_MESSAGE_BIT_SKS_NAMESPACE));
4259 pr = GNUNET_malloc (sizeof (struct PendingRequest) +
4260 (have_ns ? sizeof(GNUNET_HashCode) : 0));
4263 pr->namespace = (GNUNET_HashCode*) &pr[1];
4264 memcpy (&pr[1], &opt[bits++], sizeof (GNUNET_HashCode));
4266 if ( (GNUNET_LOAD_get_load (cp->transmission_delay) > 3 * (1 + priority)) ||
4267 (GNUNET_LOAD_get_average (cp->transmission_delay) >
4268 GNUNET_CONSTANTS_MAX_CORK_DELAY.rel_value * 2 + GNUNET_LOAD_get_average (rt_entry_lifetime)) )
4270 /* don't have BW to send to peer, or would likely take longer than we have for it,
4271 so at best indirect the query */
4273 pr->forward_only = GNUNET_YES;
4276 pr->mingle = ntohl (gm->filter_mutator);
4277 if (0 != (bm & GET_MESSAGE_BIT_TRANSMIT_TO))
4278 pr->target_pid = GNUNET_PEER_intern ((const struct GNUNET_PeerIdentity*) &opt[bits++]);
4279 pr->anonymity_level = 1;
4280 pr->priority = (uint32_t) priority;
4281 pr->ttl = bound_ttl (ntohl (gm->ttl), pr->priority);
4282 pr->query = gm->query;
4283 /* decrement ttl (always) */
4284 ttl_decrement = 2 * TTL_DECREMENT +
4285 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
4287 if ( (pr->ttl < 0) &&
4288 (((int32_t)(pr->ttl - ttl_decrement)) > 0) )
4291 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4292 "Dropping query from `%s' due to TTL underflow (%d - %u).\n",
4297 GNUNET_STATISTICS_update (stats,
4298 gettext_noop ("# requests dropped due TTL underflow"),
4301 /* integer underflow => drop (should be very rare)! */
4305 pr->ttl -= ttl_decrement;
4306 pr->start_time = GNUNET_TIME_absolute_get ();
4308 /* get bloom filter */
4311 pr->bf = GNUNET_CONTAINER_bloomfilter_init ((const char*) &opt[bits],
4314 pr->bf_size = bfsize;
4318 GNUNET_CONTAINER_multihashmap_get_multiple (query_request_map,
4320 &check_duplicate_request_peer,
4322 if (cdc.have != NULL)
4324 if (cdc.have->start_time.abs_value + cdc.have->ttl >=
4325 pr->start_time.abs_value + pr->ttl)
4327 /* existing request has higher TTL, drop new one! */
4328 cdc.have->priority += pr->priority;
4329 destroy_pending_request (pr);
4331 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4332 "Have existing request with higher TTL, dropping new request.\n",
4333 GNUNET_i2s (other));
4335 GNUNET_STATISTICS_update (stats,
4336 gettext_noop ("# requests dropped due to higher-TTL request"),
4343 /* existing request has lower TTL, drop old one! */
4344 pr->priority += cdc.have->priority;
4345 /* Possible optimization: if we have applicable pending
4346 replies in 'cdc.have', we might want to move those over
4347 (this is a really rare special-case, so it is not clear
4348 that this would be worth it) */
4349 destroy_pending_request (cdc.have);
4350 /* keep processing 'pr'! */
4355 GNUNET_break (GNUNET_OK ==
4356 GNUNET_CONTAINER_multihashmap_put (query_request_map,
4359 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
4360 GNUNET_break (GNUNET_OK ==
4361 GNUNET_CONTAINER_multihashmap_put (peer_request_map,
4364 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
4366 pr->hnode = GNUNET_CONTAINER_heap_insert (requests_by_expiration_heap,
4368 pr->start_time.abs_value + pr->ttl);
4370 GNUNET_STATISTICS_update (stats,
4371 gettext_noop ("# P2P searches received"),
4374 GNUNET_STATISTICS_update (stats,
4375 gettext_noop ("# P2P searches active"),
4379 /* calculate change in traffic preference */
4380 cps->inc_preference += pr->priority * 1000 + QUERY_BANDWIDTH_VALUE;
4381 /* process locally */
4382 if (type == GNUNET_BLOCK_TYPE_FS_DBLOCK)
4383 type = GNUNET_BLOCK_TYPE_ANY; /* to get on-demand as well */
4384 timeout = GNUNET_TIME_relative_multiply (BASIC_DATASTORE_REQUEST_DELAY,
4385 (pr->priority + 1));
4386 if (GNUNET_YES != pr->forward_only)
4389 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4390 "Handing request for `%s' to datastore\n",
4391 GNUNET_h2s (&gm->query));
4393 pr->qe = GNUNET_DATASTORE_get (dsh,
4397 MAX_DATASTORE_QUEUE,
4399 &process_local_reply,
4403 GNUNET_STATISTICS_update (stats,
4404 gettext_noop ("# requests dropped by datastore (queue length limit)"),
4411 GNUNET_STATISTICS_update (stats,
4412 gettext_noop ("# requests forwarded due to high load"),
4417 /* Are multiple results possible (and did we look locally)? If so, start processing remotely now! */
4420 case GNUNET_BLOCK_TYPE_FS_DBLOCK:
4421 case GNUNET_BLOCK_TYPE_FS_IBLOCK:
4422 /* only one result, wait for datastore */
4423 if (GNUNET_YES != pr->forward_only)
4425 GNUNET_STATISTICS_update (stats,
4426 gettext_noop ("# requests not instantly forwarded (waiting for datastore)"),
4432 if (pr->task == GNUNET_SCHEDULER_NO_TASK)
4433 pr->task = GNUNET_SCHEDULER_add_now (&forward_request_task,
4437 /* make sure we don't track too many requests */
4438 if (GNUNET_CONTAINER_heap_get_size (requests_by_expiration_heap) > max_pending_requests)
4440 pr = GNUNET_CONTAINER_heap_peek (requests_by_expiration_heap);
4441 GNUNET_assert (pr != NULL);
4442 destroy_pending_request (pr);
4448 /* **************************** CS GET Handling ************************ */
4452 * Handle START_SEARCH-message (search request from client).
4454 * @param cls closure
4455 * @param client identification of the client
4456 * @param message the actual message
4459 handle_start_search (void *cls,
4460 struct GNUNET_SERVER_Client *client,
4461 const struct GNUNET_MessageHeader *message)
4463 static GNUNET_HashCode all_zeros;
4464 const struct SearchMessage *sm;
4465 struct ClientList *cl;
4466 struct ClientRequestList *crl;
4467 struct PendingRequest *pr;
4470 enum GNUNET_BLOCK_Type type;
4472 msize = ntohs (message->size);
4473 if ( (msize < sizeof (struct SearchMessage)) ||
4474 (0 != (msize - sizeof (struct SearchMessage)) % sizeof (GNUNET_HashCode)) )
4477 GNUNET_SERVER_receive_done (client,
4481 GNUNET_STATISTICS_update (stats,
4482 gettext_noop ("# client searches received"),
4485 sc = (msize - sizeof (struct SearchMessage)) / sizeof (GNUNET_HashCode);
4486 sm = (const struct SearchMessage*) message;
4487 type = ntohl (sm->type);
4489 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4490 "Received request for `%s' of type %u from local client\n",
4491 GNUNET_h2s (&sm->query),
4492 (unsigned int) type);
4495 while ( (cl != NULL) &&
4496 (cl->client != client) )
4500 cl = GNUNET_malloc (sizeof (struct ClientList));
4501 cl->client = client;
4502 GNUNET_SERVER_client_keep (client);
4503 cl->next = client_list;
4506 /* detect duplicate KBLOCK requests */
4507 if ( (type == GNUNET_BLOCK_TYPE_FS_KBLOCK) ||
4508 (type == GNUNET_BLOCK_TYPE_FS_NBLOCK) ||
4509 (type == GNUNET_BLOCK_TYPE_ANY) )
4512 while ( (crl != NULL) &&
4513 ( (0 != memcmp (&crl->req->query,
4515 sizeof (GNUNET_HashCode))) ||
4516 (crl->req->type != type) ) )
4521 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4522 "Have existing request, merging content-seen lists.\n");
4525 /* Duplicate request (used to send long list of
4526 known/blocked results); merge 'pr->replies_seen'
4527 and update bloom filter */
4528 GNUNET_array_grow (pr->replies_seen,
4529 pr->replies_seen_size,
4530 pr->replies_seen_off + sc);
4531 memcpy (&pr->replies_seen[pr->replies_seen_off],
4533 sc * sizeof (GNUNET_HashCode));
4534 pr->replies_seen_off += sc;
4535 refresh_bloomfilter (pr);
4536 GNUNET_STATISTICS_update (stats,
4537 gettext_noop ("# client searches updated (merged content seen list)"),
4540 GNUNET_SERVER_receive_done (client,
4545 GNUNET_STATISTICS_update (stats,
4546 gettext_noop ("# client searches active"),
4549 pr = GNUNET_malloc (sizeof (struct PendingRequest) +
4550 ((type == GNUNET_BLOCK_TYPE_FS_SBLOCK) ? sizeof(GNUNET_HashCode) : 0));
4551 crl = GNUNET_malloc (sizeof (struct ClientRequestList));
4552 memset (crl, 0, sizeof (struct ClientRequestList));
4553 crl->client_list = cl;
4554 GNUNET_CONTAINER_DLL_insert (cl->rl_head,
4559 pr->client_request_list = crl;
4560 GNUNET_array_grow (pr->replies_seen,
4561 pr->replies_seen_size,
4563 memcpy (pr->replies_seen,
4565 sc * sizeof (GNUNET_HashCode));
4566 pr->replies_seen_off = sc;
4567 pr->anonymity_level = ntohl (sm->anonymity_level);
4568 pr->start_time = GNUNET_TIME_absolute_get ();
4569 refresh_bloomfilter (pr);
4570 pr->query = sm->query;
4571 if (0 == (1 & ntohl (sm->options)))
4572 pr->local_only = GNUNET_NO;
4574 pr->local_only = GNUNET_YES;
4577 case GNUNET_BLOCK_TYPE_FS_DBLOCK:
4578 case GNUNET_BLOCK_TYPE_FS_IBLOCK:
4579 if (0 != memcmp (&sm->target,
4581 sizeof (GNUNET_HashCode)))
4582 pr->target_pid = GNUNET_PEER_intern ((const struct GNUNET_PeerIdentity*) &sm->target);
4584 case GNUNET_BLOCK_TYPE_FS_SBLOCK:
4585 pr->namespace = (GNUNET_HashCode*) &pr[1];
4586 memcpy (&pr[1], &sm->target, sizeof (GNUNET_HashCode));
4591 GNUNET_break (GNUNET_OK ==
4592 GNUNET_CONTAINER_multihashmap_put (query_request_map,
4595 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
4596 if (type == GNUNET_BLOCK_TYPE_FS_DBLOCK)
4597 type = GNUNET_BLOCK_TYPE_ANY; /* get on-demand blocks too! */
4598 pr->qe = GNUNET_DATASTORE_get (dsh,
4602 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
4603 &process_local_reply,
4608 /* **************************** Startup ************************ */
4613 * Function called after GNUNET_CORE_connect has succeeded
4614 * (or failed for good). Note that the private key of the
4615 * peer is intentionally not exposed here; if you need it,
4616 * your process should try to read the private key file
4617 * directly (which should work if you are authorized...).
4619 * @param cls closure
4620 * @param server handle to the server, NULL if we failed
4621 * @param my_identity ID of this peer, NULL if we failed
4622 * @param publicKey public key of this peer, NULL if we failed
4625 peer_init_handler (void *cls,
4626 struct GNUNET_CORE_Handle * server,
4627 const struct GNUNET_PeerIdentity *
4630 GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *
4633 my_id = *my_identity;
4640 * Process fs requests.
4642 * @param server the initialized server
4643 * @param c configuration to use
4646 main_init (struct GNUNET_SERVER_Handle *server,
4647 const struct GNUNET_CONFIGURATION_Handle *c)
4649 static const struct GNUNET_CORE_MessageHandler p2p_handlers[] =
4652 GNUNET_MESSAGE_TYPE_FS_GET, 0 },
4654 GNUNET_MESSAGE_TYPE_FS_PUT, 0 },
4655 { &handle_p2p_migration_stop,
4656 GNUNET_MESSAGE_TYPE_FS_MIGRATION_STOP,
4657 sizeof (struct MigrationStopMessage) },
4660 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
4661 {&GNUNET_FS_handle_index_start, NULL,
4662 GNUNET_MESSAGE_TYPE_FS_INDEX_START, 0},
4663 {&GNUNET_FS_handle_index_list_get, NULL,
4664 GNUNET_MESSAGE_TYPE_FS_INDEX_LIST_GET, sizeof(struct GNUNET_MessageHeader) },
4665 {&GNUNET_FS_handle_unindex, NULL, GNUNET_MESSAGE_TYPE_FS_UNINDEX,
4666 sizeof (struct UnindexMessage) },
4667 {&handle_start_search, NULL, GNUNET_MESSAGE_TYPE_FS_START_SEARCH,
4671 unsigned long long enc = 128;
4674 stats = GNUNET_STATISTICS_create ("fs", cfg);
4675 min_migration_delay = GNUNET_TIME_UNIT_SECONDS;
4677 GNUNET_CONFIGURATION_get_value_number (cfg,
4679 "MAX_PENDING_REQUESTS",
4680 &max_pending_requests)) ||
4682 GNUNET_CONFIGURATION_get_value_number (cfg,
4684 "EXPECTED_NEIGHBOUR_COUNT",
4687 GNUNET_CONFIGURATION_get_value_time (cfg,
4689 "MIN_MIGRATION_DELAY",
4690 &min_migration_delay)) )
4692 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4693 _("Configuration fails to specify certain parameters, assuming default values."));
4695 connected_peers = GNUNET_CONTAINER_multihashmap_create (enc);
4696 query_request_map = GNUNET_CONTAINER_multihashmap_create (max_pending_requests);
4697 rt_entry_lifetime = GNUNET_LOAD_value_init (GNUNET_TIME_UNIT_FOREVER_REL);
4698 peer_request_map = GNUNET_CONTAINER_multihashmap_create (enc);
4699 requests_by_expiration_heap = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
4700 core = GNUNET_CORE_connect (cfg,
4704 &peer_connect_handler,
4705 &peer_disconnect_handler,
4706 &peer_status_handler,
4712 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4713 _("Failed to connect to `%s' service.\n"),
4715 GNUNET_CONTAINER_multihashmap_destroy (connected_peers);
4716 connected_peers = NULL;
4717 GNUNET_CONTAINER_multihashmap_destroy (query_request_map);
4718 query_request_map = NULL;
4719 GNUNET_LOAD_value_free (rt_entry_lifetime);
4720 rt_entry_lifetime = NULL;
4721 GNUNET_CONTAINER_heap_destroy (requests_by_expiration_heap);
4722 requests_by_expiration_heap = NULL;
4723 GNUNET_CONTAINER_multihashmap_destroy (peer_request_map);
4724 peer_request_map = NULL;
4727 GNUNET_DATASTORE_disconnect (dsh, GNUNET_NO);
4730 return GNUNET_SYSERR;
4732 if (active_from_migration)
4734 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4735 _("Content migration is enabled, will start to gather data\n"));
4736 consider_migration_gathering ();
4738 consider_dht_put_gathering (NULL);
4739 GNUNET_SERVER_disconnect_notify (server,
4740 &handle_client_disconnect,
4742 GNUNET_assert (GNUNET_OK ==
4743 GNUNET_CONFIGURATION_get_value_filename (cfg,
4747 GNUNET_DISK_directory_create (trustDirectory);
4748 GNUNET_SCHEDULER_add_with_priority (GNUNET_SCHEDULER_PRIORITY_HIGH,
4749 &cron_flush_trust, NULL);
4752 GNUNET_SERVER_add_handlers (server, handlers);
4753 cover_age_task = GNUNET_SCHEDULER_add_delayed (COVER_AGE_FREQUENCY,
4754 &age_cover_counters,
4756 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
4764 * Process fs requests.
4766 * @param cls closure
4767 * @param server the initialized server
4768 * @param cfg configuration to use
4772 struct GNUNET_SERVER_Handle *server,
4773 const struct GNUNET_CONFIGURATION_Handle *cfg)
4775 active_to_migration = GNUNET_CONFIGURATION_get_value_yesno (cfg,
4778 active_from_migration = GNUNET_CONFIGURATION_get_value_yesno (cfg,
4781 dsh = GNUNET_DATASTORE_connect (cfg);
4784 GNUNET_SCHEDULER_shutdown ();
4787 datastore_get_load = GNUNET_LOAD_value_init (DATASTORE_LOAD_AUTODECLINE);
4788 datastore_put_load = GNUNET_LOAD_value_init (DATASTORE_LOAD_AUTODECLINE);
4789 block_cfg = GNUNET_CONFIGURATION_create ();
4790 GNUNET_CONFIGURATION_set_value_string (block_cfg,
4794 block_ctx = GNUNET_BLOCK_context_create (block_cfg);
4795 GNUNET_assert (NULL != block_ctx);
4796 dht_handle = GNUNET_DHT_connect (cfg,
4798 if ( (GNUNET_OK != GNUNET_FS_indexing_init (cfg, dsh)) ||
4799 (GNUNET_OK != main_init (server, cfg)) )
4801 GNUNET_SCHEDULER_shutdown ();
4802 GNUNET_DATASTORE_disconnect (dsh, GNUNET_NO);
4804 GNUNET_DHT_disconnect (dht_handle);
4806 GNUNET_BLOCK_context_destroy (block_ctx);
4808 GNUNET_CONFIGURATION_destroy (block_cfg);
4810 GNUNET_LOAD_value_free (datastore_get_load);
4811 datastore_get_load = NULL;
4812 GNUNET_LOAD_value_free (datastore_put_load);
4813 datastore_put_load = NULL;
4820 * The main function for the fs service.
4822 * @param argc number of arguments from the command line
4823 * @param argv command line arguments
4824 * @return 0 ok, 1 on error
4827 main (int argc, char *const *argv)
4829 return (GNUNET_OK ==
4830 GNUNET_SERVICE_run (argc,
4833 GNUNET_SERVICE_OPTION_NONE,
4834 &run, NULL)) ? 0 : 1;
4837 /* end of gnunet-service-fs.c */