/*
This file is part of GNUnet
- (C) 2012 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2012, 2013, 2017 GNUnet e.V.
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 2, or (at your
+ by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
*/
-
/**
* @file consensus/gnunet-service-consensus.c
- * @brief
+ * @brief multi-peer set reconciliation
* @author Florian Dold
*/
#include "platform.h"
-#include "gnunet_common.h"
+#include "gnunet_util_lib.h"
+#include "gnunet_block_lib.h"
#include "gnunet_protocols.h"
#include "gnunet_applications.h"
-#include "gnunet_util_lib.h"
+#include "gnunet_set_service.h"
+#include "gnunet_statistics_service.h"
#include "gnunet_consensus_service.h"
-#include "gnunet_core_service.h"
-#include "gnunet_stream_lib.h"
#include "consensus_protocol.h"
-#include "ibf.h"
#include "consensus.h"
-/**
- * Number of IBFs in a strata estimator.
- */
-#define STRATA_COUNT 32
-/**
- * Number of buckets per IBF.
- */
-#define STRATA_IBF_BUCKETS 80
-/**
- * hash num parameter of the IBF
- */
-#define STRATA_HASH_NUM 3
-/**
- * Number of strata that can be transmitted in one message.
- */
-#define STRATA_PER_MESSAGE ((1<<15) / (IBF_BUCKET_SIZE * STRATA_IBF_BUCKETS))
-
-
-
-/* forward declarations */
-
-struct ConsensusSession;
-struct IncomingSocket;
-
-static void
-send_next (struct ConsensusSession *session);
-
-static void
-write_strata (void *cls, enum GNUNET_STREAM_Status status, size_t size);
-
-static int
-get_peer_idx (const struct GNUNET_PeerIdentity *peer, const struct ConsensusSession *session);
-
-
-/**
- * An element that is waiting to be transmitted to a client.
- */
-struct PendingElement
+enum ReferendumVote
{
/**
- * Pending elements are kept in a DLL.
+ * Vote that nothing should change.
+ * This option is never voted explicitly.
*/
- struct PendingElement *next;
-
+ VOTE_STAY = 0,
/**
- * Pending elements are kept in a DLL.
+ * Vote that an element should be added.
*/
- struct PendingElement *prev;
-
+ VOTE_ADD = 1,
/**
- * The actual element
+ * Vote that an element should be removed.
*/
- struct GNUNET_CONSENSUS_Element *element;
+ VOTE_REMOVE = 2,
};
-struct ConsensusPeerInformation
+
+enum EarlyStoppingPhase
{
- struct GNUNET_STREAM_Socket *socket;
+ EARLY_STOPPING_NONE = 0,
+ EARLY_STOPPING_ONE_MORE = 1,
+ EARLY_STOPPING_DONE = 2,
+};
- /**
- * Is socket's connection established, i.e. can we write to it?
- * Only relevent on outgoing cpi.
- */
- int is_connected;
+GNUNET_NETWORK_STRUCT_BEGIN
+
+/**
+ * Tuple of integers that together
+ * identify a task uniquely.
+ */
+struct TaskKey {
/**
- * Type of the peer in the all-to-all rounds,
- * GNUNET_YES if we initiate reconciliation.
+ * A value from 'enum PhaseKind'.
*/
- int is_outgoing;
+ uint16_t kind GNUNET_PACKED;
/**
- * Did we receive/send a consensus hello?
+ * Number of the first peer
+ * in canonical order.
*/
- int hello;
+ int16_t peer1 GNUNET_PACKED;
/**
- * Handle for currently active read
+ * Number of the second peer in canonical order.
*/
- struct GNUNET_STREAM_ReadHandle *rh;
+ int16_t peer2 GNUNET_PACKED;
/**
- * Handle for currently active read
+ * Repetition of the gradecast phase.
*/
- struct GNUNET_STREAM_WriteHandle *wh;
+ int16_t repetition GNUNET_PACKED;
/**
- * How many of the strate in the ibf were
- * sent or received in this round?
+ * Leader in the gradecast phase.
+ *
+ * Can be different from both peer1 and peer2.
*/
- int strata_counter;
+ int16_t leader GNUNET_PACKED;
+};
- struct InvertibleBloomFilter *my_ibf;
- int my_ibf_bucket_counter;
- struct InvertibleBloomFilter *peer_ibf;
+struct SetKey
+{
+ int set_kind GNUNET_PACKED;
+ int k1 GNUNET_PACKED;
+ int k2 GNUNET_PACKED;
+};
- int peer_ibf_bucket_counter;
+struct SetEntry
+{
+ struct SetKey key;
+ struct GNUNET_SET_Handle *h;
/**
- * Strata estimator of the peer, NULL if our peer
- * initiated the reconciliation.
+ * GNUNET_YES if the set resulted
+ * from applying a referendum with contested
+ * elements.
*/
- struct InvertibleBloomFilter **strata;
+ int is_contested;
+};
- struct GNUNET_SERVER_MessageStreamTokenizer *mst;
- struct ConsensusSession *session;
+struct DiffKey
+{
+ int diff_kind GNUNET_PACKED;
+ int k1 GNUNET_PACKED;
+ int k2 GNUNET_PACKED;
};
-struct QueuedMessage
+struct RfnKey
{
- struct GNUNET_MessageHeader *msg;
+ int rfn_kind GNUNET_PACKED;
+ int k1 GNUNET_PACKED;
+ int k2 GNUNET_PACKED;
+};
+
+GNUNET_NETWORK_STRUCT_END
+
+enum PhaseKind
+{
+ PHASE_KIND_ALL_TO_ALL,
+ PHASE_KIND_ALL_TO_ALL_2,
+ PHASE_KIND_GRADECAST_LEADER,
+ PHASE_KIND_GRADECAST_ECHO,
+ PHASE_KIND_GRADECAST_ECHO_GRADE,
+ PHASE_KIND_GRADECAST_CONFIRM,
+ PHASE_KIND_GRADECAST_CONFIRM_GRADE,
/**
- * Queued messages are stored in a doubly linked list.
+ * Apply a repetition of the all-to-all
+ * gradecast to the current set.
*/
- struct QueuedMessage *next;
+ PHASE_KIND_APPLY_REP,
+ PHASE_KIND_FINISH,
+};
+
+enum SetKind
+{
+ SET_KIND_NONE = 0,
+ SET_KIND_CURRENT,
/**
- * Queued messages are stored in a doubly linked list.
+ * Last result set from a gradecast
*/
- struct QueuedMessage *prev;
+ SET_KIND_LAST_GRADECAST,
+ SET_KIND_LEADER_PROPOSAL,
+ SET_KIND_ECHO_RESULT,
+};
+
+enum DiffKind
+{
+ DIFF_KIND_NONE = 0,
+ DIFF_KIND_LEADER_PROPOSAL,
+ DIFF_KIND_LEADER_CONSENSUS,
+ DIFF_KIND_GRADECAST_RESULT,
+};
+
+enum RfnKind
+{
+ RFN_KIND_NONE = 0,
+ RFN_KIND_ECHO,
+ RFN_KIND_CONFIRM,
+ RFN_KIND_GRADECAST_RESULT
+};
+
+
+struct SetOpCls
+{
+ struct SetKey input_set;
+
+ struct SetKey output_set;
+ struct RfnKey output_rfn;
+ struct DiffKey output_diff;
+
+ int do_not_remove;
+
+ int transceive_contested;
+
+ struct GNUNET_SET_OperationHandle *op;
};
+struct FinishCls
+{
+ struct SetKey input_set;
+};
+
/**
- * A consensus session consists of one local client and the remote authorities.
+ * Closure for both @a start_task
+ * and @a cancel_task.
*/
-struct ConsensusSession
+union TaskFuncCls
+{
+ struct SetOpCls setop;
+ struct FinishCls finish;
+};
+
+struct TaskEntry;
+
+typedef void (*TaskFunc) (struct TaskEntry *task);
+
+/*
+ * Node in the consensus task graph.
+ */
+struct TaskEntry
+{
+ struct TaskKey key;
+
+ struct Step *step;
+
+ int is_started;
+
+ int is_finished;
+
+ TaskFunc start;
+ TaskFunc cancel;
+
+ union TaskFuncCls cls;
+};
+
+
+struct Step
{
/**
- * Consensus sessions are kept in a DLL.
+ * All steps of one session are in a
+ * linked list for easier deallocation.
*/
- struct ConsensusSession *next;
+ struct Step *prev;
/**
- * Consensus sessions are kept in a DLL.
+ * All steps of one session are in a
+ * linked list for easier deallocation.
*/
- struct ConsensusSession *prev;
+ struct Step *next;
+
+ struct ConsensusSession *session;
/**
- * Join message. Used to initialize the session later,
- * if the identity of the local peer is not yet known.
- * NULL if the session has been fully initialized.
+ * Tasks that this step is composed of.
*/
- struct GNUNET_CONSENSUS_JoinMessage *join_msg;
+ struct TaskEntry **tasks;
+ unsigned int tasks_len;
+ unsigned int tasks_cap;
+
+ unsigned int finished_tasks;
+
+ /*
+ * Tasks that have this task as dependency.
+ *
+ * We store pointers to subordinates rather
+ * than to prerequisites since it makes
+ * tracking the readiness of a task easier.
+ */
+ struct Step **subordinates;
+ unsigned int subordinates_len;
+ unsigned int subordinates_cap;
/**
- * Global consensus identification, computed
- * from the local id and participating authorities.
- */
- struct GNUNET_HashCode global_id;
+ * Counter for the prerequisites of
+ * this step.
+ */
+ size_t pending_prereq;
- /**
- * Local client in this consensus session.
- * There is only one client per consensus session.
+ /*
+ * Task that will run this step despite
+ * any pending prerequisites.
*/
- struct GNUNET_SERVER_Client *client;
+ struct GNUNET_SCHEDULER_Task *timeout_task;
- /**
- * Values in the consensus set of this session,
- * all of them either have been sent by or approved by the client.
+ unsigned int is_running;
+
+ unsigned int is_finished;
+
+ /*
+ * Synchrony round of the task.
+ * Determines the deadline for the task.
*/
- struct GNUNET_CONTAINER_MultiHashMap *values;
+ unsigned int round;
/**
- * Elements that have not been sent to the client yet.
+ * Human-readable name for
+ * the task, used for debugging.
*/
- struct PendingElement *transmit_pending_head;
+ char *debug_name;
/**
- * Elements that have not been sent to the client yet.
+ * When we're doing an early finish, how should this step be
+ * treated?
+ * If GNUNET_YES, the step will be marked as finished
+ * without actually running its tasks.
+ * Otherwise, the step will still be run even after
+ * an early finish.
+ *
+ * Note that a task may never be finished early if
+ * it is already running.
*/
- struct PendingElement *transmit_pending_tail;
+ int early_finishable;
+};
- /**
- * Elements that have not been approved (or rejected) by the client yet.
+
+struct RfnElementInfo
+{
+ const struct GNUNET_SET_Element *element;
+
+ /*
+ * GNUNET_YES if the peer votes for the proposal.
*/
- struct PendingElement *approval_pending_head;
+ int *votes;
/**
- * Elements that have not been approved (or rejected) by the client yet.
+ * Proposal for this element,
+ * can only be VOTE_ADD or VOTE_REMOVE.
*/
- struct PendingElement *approval_pending_tail;
+ enum ReferendumVote proposal;
+};
- struct QueuedMessage *client_messages_head;
- struct QueuedMessage *client_messages_tail;
+struct ReferendumEntry
+{
+ struct RfnKey key;
- /**
- * Currently active transmit handle for sending to the client
+ /*
+ * Elements where there is at least one proposed change.
+ *
+ * Maps the hash of the GNUNET_SET_Element
+ * to 'struct RfnElementInfo'.
*/
- struct GNUNET_SERVER_TransmitHandle *th;
+ struct GNUNET_CONTAINER_MultiHashMap *rfn_elements;
+
+ unsigned int num_peers;
/**
- * Once conclude_requested is GNUNET_YES, the client may not
- * insert any more values.
+ * Stores, for every peer in the session,
+ * whether the peer finished the whole referendum.
+ *
+ * Votes from peers are only counted if they're
+ * marked as commited (#GNUNET_YES) in the referendum.
+ *
+ * Otherwise (#GNUNET_NO), the requested changes are
+ * not counted for majority votes or thresholds.
*/
- int conclude_requested;
+ int *peer_commited;
+
/**
- * Minimum number of peers to form a consensus group
+ * Contestation state of the peer. If a peer is contested, the values it
+ * contributed are still counted for applying changes, but the grading is
+ * affected.
*/
- int conclude_group_min;
+ int *peer_contested;
+};
+
+
+struct DiffElementInfo
+{
+ const struct GNUNET_SET_Element *element;
/**
- * Current round of the conclusion
+ * Positive weight for 'add', negative
+ * weights for 'remove'.
*/
- int current_round;
+ int weight;
+};
+
+
+/**
+ * Weighted diff.
+ */
+struct DiffEntry
+{
+ struct DiffKey key;
+ struct GNUNET_CONTAINER_MultiHashMap *changes;
+};
+
+
+/**
+ * A consensus session consists of one local client and the remote authorities.
+ */
+struct ConsensusSession
+{
/**
- * Soft deadline for conclude.
- * Speed up the speed of the consensus at the cost of consensus quality, as
- * the time approached or crosses the deadline.
+ * Consensus sessions are kept in a DLL.
*/
- struct GNUNET_TIME_Absolute conclude_deadline;
+ struct ConsensusSession *next;
/**
- * Number of other peers in the consensus
+ * Consensus sessions are kept in a DLL.
*/
- unsigned int num_peers;
+ struct ConsensusSession *prev;
- struct ConsensusPeerInformation *info;
+ unsigned int num_client_insert_pending;
+
+ struct GNUNET_CONTAINER_MultiHashMap *setmap;
+ struct GNUNET_CONTAINER_MultiHashMap *rfnmap;
+ struct GNUNET_CONTAINER_MultiHashMap *diffmap;
/**
- * Sorted array of peer identities in this consensus session,
- * includes the local peer.
+ * Array of peers with length 'num_peers'.
*/
- struct GNUNET_PeerIdentity *peers;
+ int *peers_blacklisted;
+
+ /*
+ * Mapping from (hashed) TaskKey to TaskEntry.
+ *
+ * We map the application_id for a round to the task that should be
+ * executed, so we don't have to go through all task whenever we get
+ * an incoming set op request.
+ */
+ struct GNUNET_CONTAINER_MultiHashMap *taskmap;
+
+ struct Step *steps_head;
+ struct Step *steps_tail;
+
+ int conclude_started;
+
+ int conclude_done;
/**
- * Index of the local peer in the peers array
- */
- int local_peer_idx;
+ * Global consensus identification, computed
+ * from the session id and participating authorities.
+ */
+ struct GNUNET_HashCode global_id;
/**
- * Task identifier for the round timeout task
+ * Client that inhabits the session
*/
- GNUNET_SCHEDULER_TaskIdentifier round_timeout_tid;
+ struct GNUNET_SERVICE_Client *client;
- struct InvertibleBloomFilter **strata;
-};
+ /**
+ * Queued messages to the client.
+ */
+ struct GNUNET_MQ_Handle *client_mq;
+ /**
+ * Time when the conclusion of the consensus should begin.
+ */
+ struct GNUNET_TIME_Absolute conclude_start;
-/**
- * Sockets from other peers who want to communicate with us.
- * It may not be known yet which consensus session they belong to.
- */
-struct IncomingSocket
-{
/**
- * Incoming sockets are kept in a double linked list.
+ * Timeout for all rounds together, single rounds will schedule a timeout task
+ * with a fraction of the conclude timeout.
+ * Only valid once the current round is not CONSENSUS_ROUND_BEGIN.
*/
- struct IncomingSocket *next;
+ struct GNUNET_TIME_Absolute conclude_deadline;
+
+ struct GNUNET_PeerIdentity *peers;
/**
- * Incoming sockets are kept in a double linked list.
+ * Number of other peers in the consensus.
*/
- struct IncomingSocket *prev;
+ unsigned int num_peers;
/**
- * The actual socket.
+ * Index of the local peer in the peers array
*/
- struct GNUNET_STREAM_Socket *socket;
+ unsigned int local_peer_idx;
/**
- * Handle for currently active read
+ * Listener for requests from other peers.
+ * Uses the session's global id as app id.
*/
- struct GNUNET_STREAM_ReadHandle *rh;
+ struct GNUNET_SET_ListenHandle *set_listener;
/**
- * Peer that connected to us with the socket.
+ * State of our early stopping scheme.
*/
- struct GNUNET_PeerIdentity *peer;
+ int early_stopping;
/**
- * Message stream tokenizer for this socket.
+ * Our set size from the first round.
*/
- struct GNUNET_SERVER_MessageStreamTokenizer *mst;
+ uint64_t first_size;
+
+ uint64_t *first_sizes_received;
/**
- * Peer-in-session this socket belongs to, once known, otherwise NULL.
+ * Bounded Eppstein lower bound.
*/
- struct ConsensusPeerInformation *cpi;
+ uint64_t lower_bound;
};
-static struct IncomingSocket *incoming_sockets_head;
-static struct IncomingSocket *incoming_sockets_tail;
-
/**
- * Linked list of sesstions this peer participates in.
+ * Linked list of sessions this peer participates in.
*/
static struct ConsensusSession *sessions_head;
/**
- * Linked list of sesstions this peer participates in.
+ * Linked list of sessions this peer participates in.
*/
static struct ConsensusSession *sessions_tail;
*/
static const struct GNUNET_CONFIGURATION_Handle *cfg;
-/**
- * Handle to the server for this service.
- */
-static struct GNUNET_SERVER_Handle *srv;
-
/**
* Peer that runs this service.
*/
-static struct GNUNET_PeerIdentity *my_peer;
+static struct GNUNET_PeerIdentity my_peer;
/**
- * Handle to the core service. Only used during service startup, will be NULL after that.
+ * Statistics handle.
*/
-static struct GNUNET_CORE_Handle *core;
+struct GNUNET_STATISTICS_Handle *statistics;
-/**
- * Listener for sockets from peers that want to reconcile with us.
- */
-static struct GNUNET_STREAM_ListenSocket *listener;
+
+static void
+finish_task (struct TaskEntry *task);
-static int
-estimate_difference (struct InvertibleBloomFilter** strata1,
- struct InvertibleBloomFilter** strata2)
+static void
+run_ready_steps (struct ConsensusSession *session);
+
+
+static const char *
+phasename (uint16_t phase)
{
- int i;
- int count;
- count = 0;
- for (i = STRATA_COUNT - 1; i >= 0; i--)
- {
- struct InvertibleBloomFilter *diff;
- int ibf_count;
- int more;
- ibf_count = 0;
- diff = ibf_dup (strata1[i]);
- ibf_subtract (diff, strata2[i]);
- for (;;)
- {
- more = ibf_decode (diff, NULL, NULL);
- if (GNUNET_NO == more)
- {
- count += ibf_count;
- break;
- }
- if (GNUNET_SYSERR == more)
- {
- return count * (1 << (i + 1));
- }
- ibf_count++;
- }
- ibf_destroy (diff);
+ switch (phase)
+ {
+ case PHASE_KIND_ALL_TO_ALL: return "ALL_TO_ALL";
+ case PHASE_KIND_ALL_TO_ALL_2: return "ALL_TO_ALL_2";
+ case PHASE_KIND_FINISH: return "FINISH";
+ case PHASE_KIND_GRADECAST_LEADER: return "GRADECAST_LEADER";
+ case PHASE_KIND_GRADECAST_ECHO: return "GRADECAST_ECHO";
+ case PHASE_KIND_GRADECAST_ECHO_GRADE: return "GRADECAST_ECHO_GRADE";
+ case PHASE_KIND_GRADECAST_CONFIRM: return "GRADECAST_CONFIRM";
+ case PHASE_KIND_GRADECAST_CONFIRM_GRADE: return "GRADECAST_CONFIRM_GRADE";
+ case PHASE_KIND_APPLY_REP: return "APPLY_REP";
+ default: return "(unknown)";
}
- return count;
}
-/**
- * Functions of this signature are called whenever data is available from the
- * stream.
- *
- * @param cls the closure from GNUNET_STREAM_read
- * @param status the status of the stream at the time this function is called
- * @param data traffic from the other side
- * @param size the number of bytes available in data read; will be 0 on timeout
- * @return number of bytes of processed from 'data' (any data remaining should be
- * given to the next time the read processor is called).
- */
-static size_t
-stream_data_processor (void *cls,
- enum GNUNET_STREAM_Status status,
- const void *data,
- size_t size)
+static const char *
+setname (uint16_t kind)
{
- struct IncomingSocket *incoming;
- int ret;
-
- GNUNET_assert (GNUNET_STREAM_OK == status);
-
- incoming = (struct IncomingSocket *) cls;
-
- ret = GNUNET_SERVER_mst_receive (incoming->mst, incoming, data, size, GNUNET_NO, GNUNET_NO);
- if (GNUNET_SYSERR == ret)
+ switch (kind)
{
- /* FIXME: handle this correctly */
- GNUNET_assert (0);
+ case SET_KIND_CURRENT: return "CURRENT";
+ case SET_KIND_LEADER_PROPOSAL: return "LEADER_PROPOSAL";
+ case SET_KIND_NONE: return "NONE";
+ default: return "(unknown)";
}
-
- /* read again */
- incoming->rh = GNUNET_STREAM_read (incoming->socket, GNUNET_TIME_UNIT_FOREVER_REL,
- &stream_data_processor, incoming);
-
- /* we always read all data */
- return size;
}
-static int
-handle_p2p_strata (struct ConsensusPeerInformation *cpi, const struct StrataMessage *strata_msg)
+static const char *
+rfnname (uint16_t kind)
{
- int i;
- int num_strata;
- struct GNUNET_HashCode *hash_src;
- uint8_t *count_src;
-
- GNUNET_assert (GNUNET_NO == cpi->is_outgoing);
-
- if (NULL == cpi->strata)
+ switch (kind)
{
- cpi->strata = GNUNET_malloc (STRATA_COUNT * sizeof (struct InvertibleBloomFilter *));
- for (i = 0; i < STRATA_COUNT; i++)
- cpi->strata[i] = ibf_create (STRATA_IBF_BUCKETS, STRATA_HASH_NUM, 0);
+ case RFN_KIND_NONE: return "NONE";
+ case RFN_KIND_ECHO: return "ECHO";
+ case RFN_KIND_CONFIRM: return "CONFIRM";
+ default: return "(unknown)";
}
+}
- num_strata = ntohs (strata_msg->num_strata);
-
- /* for correct message alignment, copy bucket types seperately */
- hash_src = (struct GNUNET_HashCode *) &strata_msg[1];
-
- for (i = 0; i < num_strata; i++)
+static const char *
+diffname (uint16_t kind)
+{
+ switch (kind)
{
- memcpy (cpi->strata[cpi->strata_counter+i]->hash_sum, hash_src, STRATA_IBF_BUCKETS * sizeof *hash_src);
- hash_src += STRATA_IBF_BUCKETS;
+ case DIFF_KIND_NONE: return "NONE";
+ case DIFF_KIND_LEADER_CONSENSUS: return "LEADER_CONSENSUS";
+ case DIFF_KIND_GRADECAST_RESULT: return "GRADECAST_RESULT";
+ case DIFF_KIND_LEADER_PROPOSAL: return "LEADER_PROPOSAL";
+ default: return "(unknown)";
}
+}
- for (i = 0; i < num_strata; i++)
- {
- memcpy (cpi->strata[cpi->strata_counter+i]->id_sum, hash_src, STRATA_IBF_BUCKETS * sizeof *hash_src);
- hash_src += STRATA_IBF_BUCKETS;
- }
+#ifdef GNUNET_EXTRA_LOGGING
- count_src = (uint8_t *) hash_src;
- for (i = 0; i < num_strata; i++)
- {
- uint8_t zero[STRATA_IBF_BUCKETS];
- memset (zero, 0, STRATA_IBF_BUCKETS);
- memcpy (cpi->strata[cpi->strata_counter+i]->count, count_src, STRATA_IBF_BUCKETS);
- count_src += STRATA_IBF_BUCKETS;
- }
+static const char *
+debug_str_element (const struct GNUNET_SET_Element *el)
+{
+ struct GNUNET_HashCode hash;
- GNUNET_assert (count_src == (((uint8_t *) &strata_msg[1]) + STRATA_IBF_BUCKETS * num_strata * IBF_BUCKET_SIZE));
+ GNUNET_SET_element_hash (el, &hash);
- cpi->strata_counter += num_strata;
+ return GNUNET_h2s (&hash);
+}
- if (STRATA_COUNT == cpi->strata_counter)
- {
- int diff;
- diff = estimate_difference (cpi->session->strata, cpi->strata);
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "diff=%d\n", diff);
- }
+static const char *
+debug_str_task_key (struct TaskKey *tk)
+{
+ static char buf[256];
- return GNUNET_YES;
-}
+ snprintf (buf, sizeof (buf),
+ "TaskKey kind=%s, p1=%d, p2=%d, l=%d, rep=%d",
+ phasename (tk->kind), tk->peer1, tk->peer2,
+ tk->leader, tk->repetition);
+ return buf;
+}
-static int
-handle_p2p_ibf (struct ConsensusPeerInformation *cpi, const struct DifferenceDigest *strata)
+static const char *
+debug_str_diff_key (struct DiffKey *dk)
{
- return GNUNET_YES;
-}
+ static char buf[256];
+ snprintf (buf, sizeof (buf),
+ "DiffKey kind=%s, k1=%d, k2=%d",
+ diffname (dk->diff_kind), dk->k1, dk->k2);
-static int
-handle_p2p_element (struct ConsensusPeerInformation *cpi, const struct Element *strata)
-{
- return GNUNET_YES;
+ return buf;
}
-
-static int
-handle_p2p_hello (struct IncomingSocket *inc, const struct ConsensusHello *hello)
+static const char *
+debug_str_set_key (const struct SetKey *sk)
{
- struct ConsensusSession *session;
- session = sessions_head;
- while (NULL != session)
- {
- if (0 == GNUNET_CRYPTO_hash_cmp (&session->global_id, &hello->global_id))
- {
- int idx;
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "peer helloed session\n");
- idx = get_peer_idx (inc->peer, session);
- GNUNET_assert (-1 != idx);
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "idx is %d\n", idx);
- inc->cpi = &session->info[idx];
- GNUNET_assert (GNUNET_NO == inc->cpi->is_outgoing);
- inc->cpi->mst = inc->mst;
- inc->cpi->hello = GNUNET_YES;
- inc->cpi->socket = inc->socket;
- return GNUNET_YES;
- }
- session = session->next;
- }
- GNUNET_assert (0);
- return GNUNET_NO;
-}
+ static char buf[256];
+ snprintf (buf, sizeof (buf),
+ "SetKey kind=%s, k1=%d, k2=%d",
+ setname (sk->set_kind), sk->k1, sk->k2);
-/**
- * Functions with this signature are called whenever a
- * complete message is received by the tokenizer.
- *
- * Do not call GNUNET_SERVER_mst_destroy in callback
- *
- * @param cls closure
- * @param client identification of the client
- * @param message the actual message
- *
- * @return GNUNET_OK on success, GNUNET_SYSERR to stop further processing
- */
-static int
-mst_session_callback (void *cls, void *client, const struct GNUNET_MessageHeader *message)
-{
- struct ConsensusPeerInformation *cpi;
- cpi = (struct ConsensusPeerInformation *) cls;
- switch (ntohs( message->type))
- {
- case GNUNET_MESSAGE_TYPE_CONSENSUS_P2P_DELTA_ESTIMATE:
- return handle_p2p_strata (cpi, (struct StrataMessage *) message);
- case GNUNET_MESSAGE_TYPE_CONSENSUS_P2P_DIFFERENCE_DIGEST:
- return handle_p2p_ibf (cpi, (struct DifferenceDigest *) message);
- case GNUNET_MESSAGE_TYPE_CONSENSUS_P2P_ELEMENTS:
- return handle_p2p_element (cpi, (struct Element *) message);
- default:
- /* FIXME: handle correctly */
- GNUNET_assert (0);
- }
- return GNUNET_OK;
+ return buf;
}
-/**
- * Handle tokenized messages from stream sockets.
- * Delegate them if the socket belongs to a session,
- * handle hello messages otherwise.
- *
- * Do not call GNUNET_SERVER_mst_destroy in callback
- *
- * @param cls closure, unused
- * @param client incoming socket this message comes from
- * @param message the actual message
- *
- * @return GNUNET_OK on success, GNUNET_SYSERR to stop further processing
- */
-static int
-mst_incoming_callback (void *cls, void *client, const struct GNUNET_MessageHeader *message)
+static const char *
+debug_str_rfn_key (const struct RfnKey *rk)
{
- struct IncomingSocket *inc;
- inc = (struct IncomingSocket *) client;
- switch (ntohs( message->type))
- {
- case GNUNET_MESSAGE_TYPE_CONSENSUS_P2P_HELLO:
- return handle_p2p_hello (inc, (struct ConsensusHello *) message);
- default:
- if (NULL != inc->cpi)
- return mst_session_callback (inc->cpi, client, message);
- /* FIXME: disconnect peer properly */
- GNUNET_assert (0);
- }
- return GNUNET_OK;
+ static char buf[256];
+
+ snprintf (buf, sizeof (buf),
+ "RfnKey kind=%s, k1=%d, k2=%d",
+ rfnname (rk->rfn_kind), rk->k1, rk->k2);
+
+ return buf;
}
+#endif /* GNUNET_EXTRA_LOGGING */
+
/**
- * Functions of this type are called upon new stream connection from other peers
- * or upon binding error which happen when the app_port given in
- * GNUNET_STREAM_listen() is already taken.
+ * Send the final result set of the consensus to the client, element by
+ * element.
*
- * @param cls the closure from GNUNET_STREAM_listen
- * @param socket the socket representing the stream; NULL on binding error
- * @param initiator the identity of the peer who wants to establish a stream
- * with us; NULL on binding error
- * @return GNUNET_OK to keep the socket open, GNUNET_SYSERR to close the
- * stream (the socket will be invalid after the call)
+ * @param cls closure
+ * @param element the current element, NULL if all elements have been
+ * iterated over
+ * @return #GNUNET_YES to continue iterating, #GNUNET_NO to stop.
*/
static int
-listen_cb (void *cls,
- struct GNUNET_STREAM_Socket *socket,
- const struct GNUNET_PeerIdentity *initiator)
+send_to_client_iter (void *cls,
+ const struct GNUNET_SET_Element *element)
{
- struct IncomingSocket *incoming;
-
- GNUNET_assert (NULL != socket);
-
- incoming = GNUNET_malloc (sizeof *incoming);
+ struct TaskEntry *task = (struct TaskEntry *) cls;
+ struct ConsensusSession *session = task->step->session;
+ struct GNUNET_MQ_Envelope *ev;
- incoming->socket = socket;
- incoming->peer = GNUNET_memdup (initiator, sizeof *initiator);
+ if (NULL != element)
+ {
+ struct GNUNET_CONSENSUS_ElementMessage *m;
+ const struct ConsensusElement *ce;
- incoming->rh = GNUNET_STREAM_read (socket, GNUNET_TIME_UNIT_FOREVER_REL,
- &stream_data_processor, incoming);
+ GNUNET_assert (GNUNET_BLOCK_TYPE_CONSENSUS_ELEMENT == element->element_type);
+ ce = element->data;
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO, "marker is %u\n", (unsigned) ce->marker);
- incoming->mst = GNUNET_SERVER_mst_create (mst_incoming_callback, incoming);
+ if (0 != ce->marker)
+ return GNUNET_YES;
- GNUNET_CONTAINER_DLL_insert_tail (incoming_sockets_head, incoming_sockets_tail, incoming);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "P%d: sending element %s to client\n",
+ session->local_peer_idx,
+ debug_str_element (element));
- return GNUNET_OK;
-}
+ ev = GNUNET_MQ_msg_extra (m, element->size - sizeof (struct ConsensusElement),
+ GNUNET_MESSAGE_TYPE_CONSENSUS_CLIENT_RECEIVED_ELEMENT);
+ m->element_type = ce->payload_type;
+ GNUNET_memcpy (&m[1], &ce[1], element->size - sizeof (struct ConsensusElement));
+ GNUNET_MQ_send (session->client_mq, ev);
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "P%d: finished iterating elements for client\n",
+ session->local_peer_idx);
+ ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_CONSENSUS_CLIENT_CONCLUDE_DONE);
+ GNUNET_MQ_send (session->client_mq, ev);
+ }
+ return GNUNET_YES;
+}
+
+
+static struct SetEntry *
+lookup_set (struct ConsensusSession *session, struct SetKey *key)
+{
+ struct GNUNET_HashCode hash;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "P%u: looking up set {%s}\n",
+ session->local_peer_idx,
+ debug_str_set_key (key));
+
+ GNUNET_assert (SET_KIND_NONE != key->set_kind);
+ GNUNET_CRYPTO_hash (key, sizeof (struct SetKey), &hash);
+ return GNUNET_CONTAINER_multihashmap_get (session->setmap, &hash);
+}
+
+
+static struct DiffEntry *
+lookup_diff (struct ConsensusSession *session, struct DiffKey *key)
+{
+ struct GNUNET_HashCode hash;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "P%u: looking up diff {%s}\n",
+ session->local_peer_idx,
+ debug_str_diff_key (key));
+
+ GNUNET_assert (DIFF_KIND_NONE != key->diff_kind);
+ GNUNET_CRYPTO_hash (key, sizeof (struct DiffKey), &hash);
+ return GNUNET_CONTAINER_multihashmap_get (session->diffmap, &hash);
+}
+
+
+static struct ReferendumEntry *
+lookup_rfn (struct ConsensusSession *session, struct RfnKey *key)
+{
+ struct GNUNET_HashCode hash;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "P%u: looking up rfn {%s}\n",
+ session->local_peer_idx,
+ debug_str_rfn_key (key));
+
+ GNUNET_assert (RFN_KIND_NONE != key->rfn_kind);
+ GNUNET_CRYPTO_hash (key, sizeof (struct RfnKey), &hash);
+ return GNUNET_CONTAINER_multihashmap_get (session->rfnmap, &hash);
+}
static void
-destroy_session (struct ConsensusSession *session)
+diff_insert (struct DiffEntry *diff,
+ int weight,
+ const struct GNUNET_SET_Element *element)
{
- /* FIXME: more stuff to free! */
- GNUNET_CONTAINER_DLL_remove (sessions_head, sessions_tail, session);
- GNUNET_SERVER_client_drop (session->client);
- GNUNET_free (session);
+ struct DiffElementInfo *di;
+ struct GNUNET_HashCode hash;
+
+ GNUNET_assert ( (1 == weight) || (-1 == weight));
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "diff_insert with element size %u\n",
+ element->size);
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "hashing element\n");
+
+ GNUNET_SET_element_hash (element, &hash);
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "hashed element\n");
+
+ di = GNUNET_CONTAINER_multihashmap_get (diff->changes, &hash);
+
+ if (NULL == di)
+ {
+ di = GNUNET_new (struct DiffElementInfo);
+ di->element = GNUNET_SET_element_dup (element);
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_CONTAINER_multihashmap_put (diff->changes,
+ &hash, di,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
+ }
+
+ di->weight = weight;
+}
+
+
+static void
+rfn_commit (struct ReferendumEntry *rfn,
+ uint16_t commit_peer)
+{
+ GNUNET_assert (commit_peer < rfn->num_peers);
+
+ rfn->peer_commited[commit_peer] = GNUNET_YES;
+}
+
+
+static void
+rfn_contest (struct ReferendumEntry *rfn,
+ uint16_t contested_peer)
+{
+ GNUNET_assert (contested_peer < rfn->num_peers);
+
+ rfn->peer_contested[contested_peer] = GNUNET_YES;
+}
+
+
+static uint16_t
+rfn_noncontested (struct ReferendumEntry *rfn)
+{
+ uint16_t i;
+ uint16_t ret;
+
+ ret = 0;
+ for (i = 0; i < rfn->num_peers; i++)
+ if ( (GNUNET_YES == rfn->peer_commited[i]) && (GNUNET_NO == rfn->peer_contested[i]) )
+ ret++;
+
+ return ret;
+}
+
+
+static void
+rfn_vote (struct ReferendumEntry *rfn,
+ uint16_t voting_peer,
+ enum ReferendumVote vote,
+ const struct GNUNET_SET_Element *element)
+{
+ struct RfnElementInfo *ri;
+ struct GNUNET_HashCode hash;
+
+ GNUNET_assert (voting_peer < rfn->num_peers);
+
+ /* Explicit voting only makes sense with VOTE_ADD or VOTE_REMOTE,
+ since VOTE_KEEP is implicit in not voting. */
+ GNUNET_assert ( (VOTE_ADD == vote) || (VOTE_REMOVE == vote) );
+
+ GNUNET_SET_element_hash (element, &hash);
+ ri = GNUNET_CONTAINER_multihashmap_get (rfn->rfn_elements, &hash);
+
+ if (NULL == ri)
+ {
+ ri = GNUNET_new (struct RfnElementInfo);
+ ri->element = GNUNET_SET_element_dup (element);
+ ri->votes = GNUNET_new_array (rfn->num_peers, int);
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_CONTAINER_multihashmap_put (rfn->rfn_elements,
+ &hash, ri,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
+ }
+
+ ri->votes[voting_peer] = GNUNET_YES;
+ ri->proposal = vote;
+}
+
+
+static uint16_t
+task_other_peer (struct TaskEntry *task)
+{
+ uint16_t me = task->step->session->local_peer_idx;
+ if (task->key.peer1 == me)
+ return task->key.peer2;
+ return task->key.peer1;
+}
+
+
+static int
+cmp_uint64_t (const void *pa, const void *pb)
+{
+ uint64_t a = *(uint64_t *) pa;
+ uint64_t b = *(uint64_t *) pb;
+
+ if (a == b)
+ return 0;
+ if (a < b)
+ return -1;
+ return 1;
}
/**
- * Disconnect a client, and destroy all sessions associated with it.
+ * Callback for set operation results. Called for each element
+ * in the result set.
*
- * @param client the client to disconnect
+ * @param cls closure
+ * @param element a result element, only valid if status is GNUNET_SET_STATUS_OK
+ * @param current_size current set size
+ * @param status see enum GNUNET_SET_Status
*/
static void
-disconnect_client (struct GNUNET_SERVER_Client *client)
+set_result_cb (void *cls,
+ const struct GNUNET_SET_Element *element,
+ uint64_t current_size,
+ enum GNUNET_SET_Status status)
{
- struct ConsensusSession *session;
- GNUNET_SERVER_client_disconnect (client);
-
- /* if the client owns a session, remove it */
- session = sessions_head;
- while (NULL != session)
+ struct TaskEntry *task = cls;
+ struct ConsensusSession *session = task->step->session;
+ struct SetEntry *output_set = NULL;
+ struct DiffEntry *output_diff = NULL;
+ struct ReferendumEntry *output_rfn = NULL;
+ unsigned int other_idx;
+ struct SetOpCls *setop;
+ const struct ConsensusElement *consensus_element = NULL;
+
+ if (NULL != element)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "P%u: got element of type %u, status %u\n",
+ session->local_peer_idx,
+ (unsigned) element->element_type,
+ (unsigned) status);
+ GNUNET_assert (GNUNET_BLOCK_TYPE_CONSENSUS_ELEMENT == element->element_type);
+ consensus_element = element->data;
+ }
+
+ setop = &task->cls.setop;
+
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "P%u: got set result for {%s}, status %u\n",
+ session->local_peer_idx,
+ debug_str_task_key (&task->key),
+ status);
+
+ if (GNUNET_NO == task->is_started)
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+
+ if (GNUNET_YES == task->is_finished)
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+
+ other_idx = task_other_peer (task);
+
+ if (SET_KIND_NONE != setop->output_set.set_kind)
+ {
+ output_set = lookup_set (session, &setop->output_set);
+ GNUNET_assert (NULL != output_set);
+ }
+
+ if (DIFF_KIND_NONE != setop->output_diff.diff_kind)
+ {
+ output_diff = lookup_diff (session, &setop->output_diff);
+ GNUNET_assert (NULL != output_diff);
+ }
+
+ if (RFN_KIND_NONE != setop->output_rfn.rfn_kind)
+ {
+ output_rfn = lookup_rfn (session, &setop->output_rfn);
+ GNUNET_assert (NULL != output_rfn);
+ }
+
+ if (GNUNET_YES == session->peers_blacklisted[other_idx])
+ {
+ /* Peer might have been blacklisted
+ by a gradecast running in parallel, ignore elements from now */
+ if (GNUNET_SET_STATUS_ADD_LOCAL == status)
+ return;
+ if (GNUNET_SET_STATUS_ADD_REMOTE == status)
+ return;
+ }
+
+ if ( (NULL != consensus_element) && (0 != consensus_element->marker) )
{
- if (client == session->client)
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "P%u: got some marker\n",
+ session->local_peer_idx);
+ if ( (GNUNET_YES == setop->transceive_contested) &&
+ (CONSENSUS_MARKER_CONTESTED == consensus_element->marker) )
{
- destroy_session (session);
- break;
+ GNUNET_assert (NULL != output_rfn);
+ rfn_contest (output_rfn, task_other_peer (task));
+ return;
+ }
+
+ if (CONSENSUS_MARKER_SIZE == consensus_element->marker)
+ {
+
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "P%u: got size marker\n",
+ session->local_peer_idx);
+
+
+ struct ConsensusSizeElement *cse = (void *) consensus_element;
+
+ if (cse->sender_index == other_idx)
+ {
+ if (NULL == session->first_sizes_received)
+ session->first_sizes_received = GNUNET_new_array (session->num_peers, uint64_t);
+ session->first_sizes_received[other_idx] = GNUNET_ntohll (cse->size);
+
+ uint64_t *copy = GNUNET_memdup (session->first_sizes_received, sizeof (uint64_t) * session->num_peers);
+ qsort (copy, session->num_peers, sizeof (uint64_t), cmp_uint64_t);
+ session->lower_bound = copy[session->num_peers / 3 + 1];
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "P%u: lower bound %llu\n",
+ session->local_peer_idx,
+ (long long) session->lower_bound);
+ }
+ return;
}
- session = session->next;
+
+ return;
+ }
+
+ switch (status)
+ {
+ case GNUNET_SET_STATUS_ADD_LOCAL:
+ GNUNET_assert (NULL != consensus_element);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Adding element in Task {%s}\n",
+ debug_str_task_key (&task->key));
+ if (NULL != output_set)
+ {
+ // FIXME: record pending adds, use callback
+ GNUNET_SET_add_element (output_set->h,
+ element,
+ NULL,
+ NULL);
+#ifdef GNUNET_EXTRA_LOGGING
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "P%u: adding element %s into set {%s} of task {%s}\n",
+ session->local_peer_idx,
+ debug_str_element (element),
+ debug_str_set_key (&setop->output_set),
+ debug_str_task_key (&task->key));
+#endif
+ }
+ if (NULL != output_diff)
+ {
+ diff_insert (output_diff, 1, element);
+#ifdef GNUNET_EXTRA_LOGGING
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "P%u: adding element %s into diff {%s} of task {%s}\n",
+ session->local_peer_idx,
+ debug_str_element (element),
+ debug_str_diff_key (&setop->output_diff),
+ debug_str_task_key (&task->key));
+#endif
+ }
+ if (NULL != output_rfn)
+ {
+ rfn_vote (output_rfn, task_other_peer (task), VOTE_ADD, element);
+#ifdef GNUNET_EXTRA_LOGGING
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "P%u: adding element %s into rfn {%s} of task {%s}\n",
+ session->local_peer_idx,
+ debug_str_element (element),
+ debug_str_rfn_key (&setop->output_rfn),
+ debug_str_task_key (&task->key));
+#endif
+ }
+ // XXX: add result to structures in task
+ break;
+ case GNUNET_SET_STATUS_ADD_REMOTE:
+ GNUNET_assert (NULL != consensus_element);
+ if (GNUNET_YES == setop->do_not_remove)
+ break;
+ if (CONSENSUS_MARKER_CONTESTED == consensus_element->marker)
+ break;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Removing element in Task {%s}\n",
+ debug_str_task_key (&task->key));
+ if (NULL != output_set)
+ {
+ // FIXME: record pending adds, use callback
+ GNUNET_SET_remove_element (output_set->h,
+ element,
+ NULL,
+ NULL);
+#ifdef GNUNET_EXTRA_LOGGING
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "P%u: removing element %s from set {%s} of task {%s}\n",
+ session->local_peer_idx,
+ debug_str_element (element),
+ debug_str_set_key (&setop->output_set),
+ debug_str_task_key (&task->key));
+#endif
+ }
+ if (NULL != output_diff)
+ {
+ diff_insert (output_diff, -1, element);
+#ifdef GNUNET_EXTRA_LOGGING
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "P%u: removing element %s from diff {%s} of task {%s}\n",
+ session->local_peer_idx,
+ debug_str_element (element),
+ debug_str_diff_key (&setop->output_diff),
+ debug_str_task_key (&task->key));
+#endif
+ }
+ if (NULL != output_rfn)
+ {
+ rfn_vote (output_rfn, task_other_peer (task), VOTE_REMOVE, element);
+#ifdef GNUNET_EXTRA_LOGGING
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "P%u: removing element %s from rfn {%s} of task {%s}\n",
+ session->local_peer_idx,
+ debug_str_element (element),
+ debug_str_rfn_key (&setop->output_rfn),
+ debug_str_task_key (&task->key));
+#endif
+ }
+ break;
+ case GNUNET_SET_STATUS_DONE:
+ // XXX: check first if any changes to the underlying
+ // set are still pending
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Finishing setop in Task {%s}\n",
+ debug_str_task_key (&task->key));
+ if (NULL != output_rfn)
+ {
+ rfn_commit (output_rfn, task_other_peer (task));
+ }
+ if (PHASE_KIND_ALL_TO_ALL == task->key.kind)
+ {
+ session->first_size = current_size;
+ }
+ finish_task (task);
+ break;
+ case GNUNET_SET_STATUS_FAILURE:
+ // XXX: cleanup
+ GNUNET_break_op (0);
+ finish_task (task);
+ return;
+ default:
+ /* not reached */
+ GNUNET_assert (0);
}
}
+#ifdef EVIL
+
+enum EvilnessType
+{
+ EVILNESS_NONE,
+ EVILNESS_CRAM_ALL,
+ EVILNESS_CRAM_LEAD,
+ EVILNESS_CRAM_ECHO,
+ EVILNESS_SLACK,
+ EVILNESS_SLACK_A2A,
+};
+
+enum EvilnessSubType
+{
+ EVILNESS_SUB_NONE,
+ EVILNESS_SUB_REPLACEMENT,
+ EVILNESS_SUB_NO_REPLACEMENT,
+};
+
+struct Evilness
+{
+ enum EvilnessType type;
+ enum EvilnessSubType subtype;
+ unsigned int num;
+};
+
+
+static int
+parse_evilness_cram_subtype (const char *evil_subtype_str, struct Evilness *evil)
+{
+ if (0 == strcmp ("replace", evil_subtype_str))
+ {
+ evil->subtype = EVILNESS_SUB_REPLACEMENT;
+ }
+ else if (0 == strcmp ("noreplace", evil_subtype_str))
+ {
+ evil->subtype = EVILNESS_SUB_NO_REPLACEMENT;
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Malformed field '%s' in EVIL_SPEC (unknown subtype), behaving like a good peer.\n",
+ evil_subtype_str);
+ return GNUNET_SYSERR;
+ }
+ return GNUNET_OK;
+}
+
-/**
- * Compute a global, (hopefully) unique consensus session id,
- * from the local id of the consensus session, and the identities of all participants.
- * Thus, if the local id of two consensus sessions coincide, but are not comprised of
- * exactly the same peers, the global id will be different.
- *
- * @param local_id local id of the consensus session
- * @param peers array of all peers participating in the consensus session
- * @param num_peers number of elements in the peers array
- * @param dst where the result is stored, may not be NULL
- */
static void
-compute_global_id (const struct GNUNET_HashCode *local_id,
- const struct GNUNET_PeerIdentity *peers, int num_peers,
- struct GNUNET_HashCode *dst)
+get_evilness (struct ConsensusSession *session, struct Evilness *evil)
{
- int i;
- struct GNUNET_HashCode tmp;
+ char *evil_spec;
+ char *field;
+ char *evil_type_str = NULL;
+ char *evil_subtype_str = NULL;
+
+ GNUNET_assert (NULL != evil);
+
+ if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (cfg, "consensus", "EVIL_SPEC", &evil_spec))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "P%u: no evilness\n",
+ session->local_peer_idx);
+ evil->type = EVILNESS_NONE;
+ return;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "P%u: got evilness spec\n",
+ session->local_peer_idx);
- *dst = *local_id;
- for (i = 0; i < num_peers; ++i)
+ for (field = strtok (evil_spec, "/");
+ NULL != field;
+ field = strtok (NULL, "/"))
{
- GNUNET_CRYPTO_hash_xor (dst, &peers[0].hashPubKey, &tmp);
- *dst = tmp;
- GNUNET_CRYPTO_hash (dst, sizeof (struct GNUNET_PeerIdentity), &tmp);
- *dst = tmp;
+ unsigned int peer_num;
+ unsigned int evil_num;
+ int ret;
+
+ evil_type_str = NULL;
+ evil_subtype_str = NULL;
+
+ ret = sscanf (field, "%u;%m[a-z-];%m[a-z-];%u", &peer_num, &evil_type_str, &evil_subtype_str, &evil_num);
+
+ if (ret != 4)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Malformed field '%s' in EVIL_SPEC (expected 4 components got %d), behaving like a good peer.\n",
+ field,
+ ret);
+ goto not_evil;
+ }
+
+ GNUNET_assert (NULL != evil_type_str);
+ GNUNET_assert (NULL != evil_subtype_str);
+
+ if (peer_num == session->local_peer_idx)
+ {
+ if (0 == strcmp ("slack", evil_type_str))
+ {
+ evil->type = EVILNESS_SLACK;
+ }
+ if (0 == strcmp ("slack-a2a", evil_type_str))
+ {
+ evil->type = EVILNESS_SLACK_A2A;
+ }
+ else if (0 == strcmp ("cram-all", evil_type_str))
+ {
+ evil->type = EVILNESS_CRAM_ALL;
+ evil->num = evil_num;
+ if (GNUNET_OK != parse_evilness_cram_subtype (evil_subtype_str, evil))
+ goto not_evil;
+ }
+ else if (0 == strcmp ("cram-lead", evil_type_str))
+ {
+ evil->type = EVILNESS_CRAM_LEAD;
+ evil->num = evil_num;
+ if (GNUNET_OK != parse_evilness_cram_subtype (evil_subtype_str, evil))
+ goto not_evil;
+ }
+ else if (0 == strcmp ("cram-echo", evil_type_str))
+ {
+ evil->type = EVILNESS_CRAM_ECHO;
+ evil->num = evil_num;
+ if (GNUNET_OK != parse_evilness_cram_subtype (evil_subtype_str, evil))
+ goto not_evil;
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Malformed field '%s' in EVIL_SPEC (unknown type), behaving like a good peer.\n",
+ evil_type_str);
+ goto not_evil;
+ }
+ goto cleanup;
+ }
+ /* No GNUNET_free since memory was allocated by libc */
+ free (evil_type_str);
+ evil_type_str = NULL;
+ evil_subtype_str = NULL;
}
+not_evil:
+ evil->type = EVILNESS_NONE;
+cleanup:
+ GNUNET_free (evil_spec);
+ /* no GNUNET_free_non_null since it wasn't
+ * allocated with GNUNET_malloc */
+ if (NULL != evil_type_str)
+ free (evil_type_str);
+ if (NULL != evil_subtype_str)
+ free (evil_subtype_str);
}
+#endif
+
/**
- * Function called to notify a client about the connection
- * begin ready to queue more data. "buf" will be
- * NULL and "size" zero if the connection was closed for
- * writing in the meantime.
- *
- * @param cls consensus session
- * @param size number of bytes available in buf
- * @param buf where the callee should write the message
- * @return number of bytes written to buf
+ * Commit the appropriate set for a
+ * task.
*/
-static size_t
-transmit_queued (void *cls, size_t size,
- void *buf)
+static void
+commit_set (struct ConsensusSession *session,
+ struct TaskEntry *task)
{
- struct ConsensusSession *session;
- struct QueuedMessage *qmsg;
- size_t msg_size;
+ struct SetEntry *set;
+ struct SetOpCls *setop = &task->cls.setop;
- session = (struct ConsensusSession *) cls;
- session->th = NULL;
+ GNUNET_assert (NULL != setop->op);
+ set = lookup_set (session, &setop->input_set);
+ GNUNET_assert (NULL != set);
+ if ( (GNUNET_YES == setop->transceive_contested) && (GNUNET_YES == set->is_contested) )
+ {
+ struct GNUNET_SET_Element element;
+ struct ConsensusElement ce = { 0 };
+ ce.marker = CONSENSUS_MARKER_CONTESTED;
+ element.data = &ce;
+ element.size = sizeof (struct ConsensusElement);
+ element.element_type = GNUNET_BLOCK_TYPE_CONSENSUS_ELEMENT;
+ GNUNET_SET_add_element (set->h, &element, NULL, NULL);
+ }
- qmsg = session->client_messages_head;
- GNUNET_CONTAINER_DLL_remove (session->client_messages_head, session->client_messages_tail, qmsg);
- GNUNET_assert (qmsg);
+ if (PHASE_KIND_ALL_TO_ALL_2 == task->key.kind)
+ {
+ struct GNUNET_SET_Element element;
+ struct ConsensusSizeElement cse = { 0 };
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO, "inserting size marker\n");
+ cse.ce.marker = CONSENSUS_MARKER_SIZE;
+ cse.size = GNUNET_htonll (session->first_size);
+ cse.sender_index = session->local_peer_idx;
+ element.data = &cse;
+ element.size = sizeof (struct ConsensusSizeElement);
+ element.element_type = GNUNET_BLOCK_TYPE_CONSENSUS_ELEMENT;
+ GNUNET_SET_add_element (set->h, &element, NULL, NULL);
+ }
- if (NULL == buf)
+#ifdef EVIL
{
- destroy_session (session);
- return 0;
+ unsigned int i;
+ struct Evilness evil;
+
+ get_evilness (session, &evil);
+ if (EVILNESS_NONE != evil.type)
+ {
+ /* Useful for evaluation */
+ GNUNET_STATISTICS_set (statistics,
+ "is evil",
+ 1,
+ GNUNET_NO);
+ }
+ switch (evil.type)
+ {
+ case EVILNESS_CRAM_ALL:
+ case EVILNESS_CRAM_LEAD:
+ case EVILNESS_CRAM_ECHO:
+ /* We're not cramming elements in the
+ all-to-all round, since that would just
+ add more elements to the result set, but
+ wouldn't test robustness. */
+ if (PHASE_KIND_ALL_TO_ALL == task->key.kind)
+ {
+ GNUNET_SET_commit (setop->op, set->h);
+ break;
+ }
+ if ((EVILNESS_CRAM_LEAD == evil.type) &&
+ ((PHASE_KIND_GRADECAST_LEADER != task->key.kind) || SET_KIND_CURRENT != set->key.set_kind))
+ {
+ GNUNET_SET_commit (setop->op, set->h);
+ break;
+ }
+ if (EVILNESS_CRAM_ECHO == evil.type && (PHASE_KIND_GRADECAST_ECHO != task->key.kind))
+ {
+ GNUNET_SET_commit (setop->op, set->h);
+ break;
+ }
+ for (i = 0; i < evil.num; i++)
+ {
+ struct GNUNET_SET_Element element;
+ struct ConsensusStuffedElement se = { 0 };
+ element.data = &se;
+ element.size = sizeof (struct ConsensusStuffedElement);
+ element.element_type = GNUNET_BLOCK_TYPE_CONSENSUS_ELEMENT;
+
+ if (EVILNESS_SUB_REPLACEMENT == evil.subtype)
+ {
+ /* Always generate a new element. */
+ GNUNET_CRYPTO_hash_create_random (GNUNET_CRYPTO_QUALITY_WEAK, &se.rand);
+ }
+ else if (EVILNESS_SUB_NO_REPLACEMENT == evil.subtype)
+ {
+ /* Always cram the same elements, derived from counter. */
+ GNUNET_CRYPTO_hash (&i, sizeof (i), &se.rand);
+ }
+ else
+ {
+ GNUNET_assert (0);
+ }
+ GNUNET_SET_add_element (set->h, &element, NULL, NULL);
+#ifdef GNUNET_EXTRA_LOGGING
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "P%u: evil peer: cramming element %s into set {%s} of task {%s}\n",
+ session->local_peer_idx,
+ debug_str_element (&element),
+ debug_str_set_key (&setop->input_set),
+ debug_str_task_key (&task->key));
+#endif
+ }
+ GNUNET_STATISTICS_update (statistics,
+ "# stuffed elements",
+ evil.num,
+ GNUNET_NO);
+ GNUNET_SET_commit (setop->op, set->h);
+ break;
+ case EVILNESS_SLACK:
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "P%u: evil peer: slacking\n",
+ (unsigned int) session->local_peer_idx);
+ /* Do nothing. */
+ case EVILNESS_SLACK_A2A:
+ if ( (PHASE_KIND_ALL_TO_ALL_2 == task->key.kind ) ||
+ (PHASE_KIND_ALL_TO_ALL == task->key.kind) )
+ {
+ struct GNUNET_SET_Handle *empty_set;
+ empty_set = GNUNET_SET_create (cfg, GNUNET_SET_OPERATION_UNION);
+ GNUNET_SET_commit (setop->op, empty_set);
+ GNUNET_SET_destroy (empty_set);
+ }
+ else
+ {
+ GNUNET_SET_commit (setop->op, set->h);
+ }
+ break;
+ case EVILNESS_NONE:
+ GNUNET_SET_commit (setop->op, set->h);
+ break;
+ }
+ }
+#else
+ if (GNUNET_NO == session->peers_blacklisted[task_other_peer (task)])
+ {
+ GNUNET_SET_commit (setop->op, set->h);
+ }
+ else
+ {
+ /* For our testcases, we don't want the blacklisted
+ peers to wait. */
+ GNUNET_SET_operation_cancel (setop->op);
+ setop->op = NULL;
}
+#endif
+}
+
+
+static void
+put_diff (struct ConsensusSession *session,
+ struct DiffEntry *diff)
+{
+ struct GNUNET_HashCode hash;
+
+ GNUNET_assert (NULL != diff);
- msg_size = ntohs (qmsg->msg->size);
+ GNUNET_CRYPTO_hash (&diff->key, sizeof (struct DiffKey), &hash);
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_CONTAINER_multihashmap_put (session->diffmap, &hash, diff,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
+}
- GNUNET_assert (size >= msg_size);
+static void
+put_set (struct ConsensusSession *session,
+ struct SetEntry *set)
+{
+ struct GNUNET_HashCode hash;
- memcpy (buf, qmsg->msg, msg_size);
- GNUNET_free (qmsg->msg);
- GNUNET_free (qmsg);
+ GNUNET_assert (NULL != set->h);
- send_next (session);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Putting set %s\n",
+ debug_str_set_key (&set->key));
- return msg_size;
+ GNUNET_CRYPTO_hash (&set->key, sizeof (struct SetKey), &hash);
+ GNUNET_assert (GNUNET_SYSERR !=
+ GNUNET_CONTAINER_multihashmap_put (session->setmap, &hash, set,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE));
}
-/**
- * Schedule sending the next message (if there is any) to a client.
+static void
+put_rfn (struct ConsensusSession *session,
+ struct ReferendumEntry *rfn)
+{
+ struct GNUNET_HashCode hash;
+
+ GNUNET_CRYPTO_hash (&rfn->key, sizeof (struct RfnKey), &hash);
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_CONTAINER_multihashmap_put (session->rfnmap, &hash, rfn,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
+}
+
+
+
+static void
+task_cancel_reconcile (struct TaskEntry *task)
+{
+ /* not implemented yet */
+ GNUNET_assert (0);
+}
+
+
+static void
+apply_diff_to_rfn (struct DiffEntry *diff,
+ struct ReferendumEntry *rfn,
+ uint16_t voting_peer,
+ uint16_t num_peers)
+{
+ struct GNUNET_CONTAINER_MultiHashMapIterator *iter;
+ struct DiffElementInfo *di;
+
+ iter = GNUNET_CONTAINER_multihashmap_iterator_create (diff->changes);
+
+ while (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap_iterator_next (iter,
+ NULL,
+ (const void **) &di))
+ {
+ if (di->weight > 0)
+ {
+ rfn_vote (rfn, voting_peer, VOTE_ADD, di->element);
+ }
+ if (di->weight < 0)
+ {
+ rfn_vote (rfn, voting_peer, VOTE_REMOVE, di->element);
+ }
+ }
+
+ GNUNET_CONTAINER_multihashmap_iterator_destroy (iter);
+}
+
+
+struct DiffEntry *
+diff_create ()
+{
+ struct DiffEntry *d = GNUNET_new (struct DiffEntry);
+
+ d->changes = GNUNET_CONTAINER_multihashmap_create (8, GNUNET_NO);
+
+ return d;
+}
+
+
+struct DiffEntry *
+diff_compose (struct DiffEntry *diff_1,
+ struct DiffEntry *diff_2)
+{
+ struct DiffEntry *diff_new;
+ struct GNUNET_CONTAINER_MultiHashMapIterator *iter;
+ struct DiffElementInfo *di;
+
+ diff_new = diff_create ();
+
+ iter = GNUNET_CONTAINER_multihashmap_iterator_create (diff_1->changes);
+ while (GNUNET_YES == GNUNET_CONTAINER_multihashmap_iterator_next (iter, NULL, (const void **) &di))
+ {
+ diff_insert (diff_new, di->weight, di->element);
+ }
+ GNUNET_CONTAINER_multihashmap_iterator_destroy (iter);
+
+ iter = GNUNET_CONTAINER_multihashmap_iterator_create (diff_2->changes);
+ while (GNUNET_YES == GNUNET_CONTAINER_multihashmap_iterator_next (iter, NULL, (const void **) &di))
+ {
+ diff_insert (diff_new, di->weight, di->element);
+ }
+ GNUNET_CONTAINER_multihashmap_iterator_destroy (iter);
+
+ return diff_new;
+}
+
+
+struct ReferendumEntry *
+rfn_create (uint16_t size)
+{
+ struct ReferendumEntry *rfn;
+
+ rfn = GNUNET_new (struct ReferendumEntry);
+ rfn->rfn_elements = GNUNET_CONTAINER_multihashmap_create (8, GNUNET_NO);
+ rfn->peer_commited = GNUNET_new_array (size, int);
+ rfn->peer_contested = GNUNET_new_array (size, int);
+ rfn->num_peers = size;
+
+ return rfn;
+}
+
+
+#if UNUSED
+static void
+diff_destroy (struct DiffEntry *diff)
+{
+ GNUNET_CONTAINER_multihashmap_destroy (diff->changes);
+ GNUNET_free (diff);
+}
+#endif
+
+
+/**
+ * For a given majority, count what the outcome
+ * is (add/remove/keep), and give the number
+ * of peers that voted for this outcome.
+ */
+static void
+rfn_majority (const struct ReferendumEntry *rfn,
+ const struct RfnElementInfo *ri,
+ uint16_t *ret_majority,
+ enum ReferendumVote *ret_vote)
+{
+ uint16_t votes_yes = 0;
+ uint16_t num_commited = 0;
+ uint16_t i;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Computing rfn majority for element %s of rfn {%s}\n",
+ debug_str_element (ri->element),
+ debug_str_rfn_key (&rfn->key));
+
+ for (i = 0; i < rfn->num_peers; i++)
+ {
+ if (GNUNET_NO == rfn->peer_commited[i])
+ continue;
+ num_commited++;
+
+ if (GNUNET_YES == ri->votes[i])
+ votes_yes++;
+ }
+
+ if (votes_yes > (num_commited) / 2)
+ {
+ *ret_vote = ri->proposal;
+ *ret_majority = votes_yes;
+ }
+ else
+ {
+ *ret_vote = VOTE_STAY;
+ *ret_majority = num_commited - votes_yes;
+ }
+}
+
+
+struct SetCopyCls
+{
+ struct TaskEntry *task;
+ struct SetKey dst_set_key;
+};
+
+
+static void
+set_copy_cb (void *cls, struct GNUNET_SET_Handle *copy)
+{
+ struct SetCopyCls *scc = cls;
+ struct TaskEntry *task = scc->task;
+ struct SetKey dst_set_key = scc->dst_set_key;
+ struct SetEntry *set;
+
+ GNUNET_free (scc);
+ set = GNUNET_new (struct SetEntry);
+ set->h = copy;
+ set->key = dst_set_key;
+ put_set (task->step->session, set);
+
+ task->start (task);
+}
+
+
+/**
+ * Call the start function of the given
+ * task again after we created a copy of the given set.
+ */
+static void
+create_set_copy_for_task (struct TaskEntry *task,
+ struct SetKey *src_set_key,
+ struct SetKey *dst_set_key)
+{
+ struct SetEntry *src_set;
+ struct SetCopyCls *scc = GNUNET_new (struct SetCopyCls);
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Copying set {%s} to {%s} for task {%s}\n",
+ debug_str_set_key (src_set_key),
+ debug_str_set_key (dst_set_key),
+ debug_str_task_key (&task->key));
+
+ scc->task = task;
+ scc->dst_set_key = *dst_set_key;
+ src_set = lookup_set (task->step->session, src_set_key);
+ GNUNET_assert (NULL != src_set);
+ GNUNET_SET_copy_lazy (src_set->h,
+ set_copy_cb,
+ scc);
+}
+
+
+struct SetMutationProgressCls
+{
+ int num_pending;
+ /**
+ * Task to finish once all changes are through.
+ */
+ struct TaskEntry *task;
+};
+
+
+static void
+set_mutation_done (void *cls)
+{
+ struct SetMutationProgressCls *pc = cls;
+
+ GNUNET_assert (pc->num_pending > 0);
+
+ pc->num_pending--;
+
+ if (0 == pc->num_pending)
+ {
+ struct TaskEntry *task = pc->task;
+ GNUNET_free (pc);
+ finish_task (task);
+ }
+}
+
+
+static void
+try_finish_step_early (struct Step *step)
+{
+ unsigned int i;
+
+ if (GNUNET_YES == step->is_running)
+ return;
+ if (GNUNET_YES == step->is_finished)
+ return;
+ if (GNUNET_NO == step->early_finishable)
+ return;
+
+ step->is_finished = GNUNET_YES;
+
+#ifdef GNUNET_EXTRA_LOGGING
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Finishing step `%s' early.\n",
+ step->debug_name);
+#endif
+
+ for (i = 0; i < step->subordinates_len; i++)
+ {
+ GNUNET_assert (step->subordinates[i]->pending_prereq > 0);
+ step->subordinates[i]->pending_prereq--;
+#ifdef GNUNET_EXTRA_LOGGING
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Decreased pending_prereq to %u for step `%s'.\n",
+ (unsigned int) step->subordinates[i]->pending_prereq,
+ step->subordinates[i]->debug_name);
+
+#endif
+ try_finish_step_early (step->subordinates[i]);
+ }
+
+ // XXX: maybe schedule as task to avoid recursion?
+ run_ready_steps (step->session);
+}
+
+
+static void
+finish_step (struct Step *step)
+{
+ unsigned int i;
+
+ GNUNET_assert (step->finished_tasks == step->tasks_len);
+ GNUNET_assert (GNUNET_YES == step->is_running);
+ GNUNET_assert (GNUNET_NO == step->is_finished);
+
+#ifdef GNUNET_EXTRA_LOGGING
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "All tasks of step `%s' with %u subordinates finished.\n",
+ step->debug_name,
+ step->subordinates_len);
+#endif
+
+ for (i = 0; i < step->subordinates_len; i++)
+ {
+ GNUNET_assert (step->subordinates[i]->pending_prereq > 0);
+ step->subordinates[i]->pending_prereq--;
+#ifdef GNUNET_EXTRA_LOGGING
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Decreased pending_prereq to %u for step `%s'.\n",
+ (unsigned int) step->subordinates[i]->pending_prereq,
+ step->subordinates[i]->debug_name);
+
+#endif
+ }
+
+ step->is_finished = GNUNET_YES;
+
+ // XXX: maybe schedule as task to avoid recursion?
+ run_ready_steps (step->session);
+}
+
+
+
+/**
+ * Apply the result from one round of gradecasts (i.e. every peer
+ * should have gradecasted) to the peer's current set.
+ *
+ * @param task the task with context information
+ */
+static void
+task_start_apply_round (struct TaskEntry *task)
+{
+ struct ConsensusSession *session = task->step->session;
+ struct SetKey sk_in;
+ struct SetKey sk_out;
+ struct RfnKey rk_in;
+ struct SetEntry *set_out;
+ struct ReferendumEntry *rfn_in;
+ struct GNUNET_CONTAINER_MultiHashMapIterator *iter;
+ struct RfnElementInfo *ri;
+ struct SetMutationProgressCls *progress_cls;
+ uint16_t worst_majority = UINT16_MAX;
+
+ sk_in = (struct SetKey) { SET_KIND_CURRENT, task->key.repetition };
+ rk_in = (struct RfnKey) { RFN_KIND_GRADECAST_RESULT, task->key.repetition };
+ sk_out = (struct SetKey) { SET_KIND_CURRENT, task->key.repetition + 1 };
+
+ set_out = lookup_set (session, &sk_out);
+ if (NULL == set_out)
+ {
+ create_set_copy_for_task (task, &sk_in, &sk_out);
+ return;
+ }
+
+ rfn_in = lookup_rfn (session, &rk_in);
+ GNUNET_assert (NULL != rfn_in);
+
+ progress_cls = GNUNET_new (struct SetMutationProgressCls);
+ progress_cls->task = task;
+
+ iter = GNUNET_CONTAINER_multihashmap_iterator_create (rfn_in->rfn_elements);
+
+ while (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap_iterator_next (iter,
+ NULL,
+ (const void **) &ri))
+ {
+ uint16_t majority_num;
+ enum ReferendumVote majority_vote;
+
+ rfn_majority (rfn_in, ri, &majority_num, &majority_vote);
+
+ if (worst_majority > majority_num)
+ worst_majority = majority_num;
+
+ switch (majority_vote)
+ {
+ case VOTE_ADD:
+ progress_cls->num_pending++;
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_SET_add_element (set_out->h,
+ ri->element,
+ &set_mutation_done,
+ progress_cls));
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "P%u: apply round: adding element %s with %u-majority.\n",
+ session->local_peer_idx,
+ debug_str_element (ri->element), majority_num);
+ break;
+ case VOTE_REMOVE:
+ progress_cls->num_pending++;
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_SET_remove_element (set_out->h,
+ ri->element,
+ &set_mutation_done,
+ progress_cls));
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "P%u: apply round: deleting element %s with %u-majority.\n",
+ session->local_peer_idx,
+ debug_str_element (ri->element), majority_num);
+ break;
+ case VOTE_STAY:
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "P%u: apply round: keeping element %s with %u-majority.\n",
+ session->local_peer_idx,
+ debug_str_element (ri->element), majority_num);
+ // do nothing
+ break;
+ default:
+ GNUNET_assert (0);
+ break;
+ }
+ }
+
+ if (0 == progress_cls->num_pending)
+ {
+ // call closure right now, no pending ops
+ GNUNET_free (progress_cls);
+ finish_task (task);
+ }
+
+ {
+ uint16_t thresh = (session->num_peers / 3) * 2;
+
+ if (worst_majority >= thresh)
+ {
+ switch (session->early_stopping)
+ {
+ case EARLY_STOPPING_NONE:
+ session->early_stopping = EARLY_STOPPING_ONE_MORE;
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "P%u: Stopping early (after one more superround)\n",
+ session->local_peer_idx);
+ break;
+ case EARLY_STOPPING_ONE_MORE:
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO, "P%u: finishing steps due to early finish\n",
+ session->local_peer_idx);
+ session->early_stopping = EARLY_STOPPING_DONE;
+ {
+ struct Step *step;
+ for (step = session->steps_head; NULL != step; step = step->next)
+ try_finish_step_early (step);
+ }
+ break;
+ case EARLY_STOPPING_DONE:
+ /* We shouldn't be here anymore after early stopping */
+ GNUNET_break (0);
+ break;
+ default:
+ GNUNET_assert (0);
+ break;
+ }
+ }
+ else if (EARLY_STOPPING_NONE != session->early_stopping)
+ {
+ // Our assumption about the number of bad peers
+ // has been broken.
+ GNUNET_break_op (0);
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO, "P%u: NOT finishing early (majority not good enough)\n",
+ session->local_peer_idx);
+ }
+ }
+ GNUNET_CONTAINER_multihashmap_iterator_destroy (iter);
+}
+
+
+static void
+task_start_grade (struct TaskEntry *task)
+{
+ struct ConsensusSession *session = task->step->session;
+ struct ReferendumEntry *output_rfn;
+ struct ReferendumEntry *input_rfn;
+ struct DiffEntry *input_diff;
+ struct RfnKey rfn_key;
+ struct DiffKey diff_key;
+ struct GNUNET_CONTAINER_MultiHashMapIterator *iter;
+ struct RfnElementInfo *ri;
+ unsigned int gradecast_confidence = 2;
+
+ rfn_key = (struct RfnKey) { RFN_KIND_GRADECAST_RESULT, task->key.repetition };
+ output_rfn = lookup_rfn (session, &rfn_key);
+ if (NULL == output_rfn)
+ {
+ output_rfn = rfn_create (session->num_peers);
+ output_rfn->key = rfn_key;
+ put_rfn (session, output_rfn);
+ }
+
+ diff_key = (struct DiffKey) { DIFF_KIND_LEADER_PROPOSAL, task->key.repetition, task->key.leader };
+ input_diff = lookup_diff (session, &diff_key);
+ GNUNET_assert (NULL != input_diff);
+
+ rfn_key = (struct RfnKey) { RFN_KIND_ECHO, task->key.repetition, task->key.leader };
+ input_rfn = lookup_rfn (session, &rfn_key);
+ GNUNET_assert (NULL != input_rfn);
+
+ iter = GNUNET_CONTAINER_multihashmap_iterator_create (input_rfn->rfn_elements);
+
+ apply_diff_to_rfn (input_diff, output_rfn, task->key.leader, session->num_peers);
+
+ while (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap_iterator_next (iter,
+ NULL,
+ (const void **) &ri))
+ {
+ uint16_t majority_num;
+ enum ReferendumVote majority_vote;
+
+ // XXX: we need contested votes and non-contested votes here
+ rfn_majority (input_rfn, ri, &majority_num, &majority_vote);
+
+ if (majority_num <= session->num_peers / 3)
+ majority_vote = VOTE_REMOVE;
+
+ switch (majority_vote)
+ {
+ case VOTE_STAY:
+ break;
+ case VOTE_ADD:
+ rfn_vote (output_rfn, task->key.leader, VOTE_ADD, ri->element);
+ break;
+ case VOTE_REMOVE:
+ rfn_vote (output_rfn, task->key.leader, VOTE_REMOVE, ri->element);
+ break;
+ default:
+ GNUNET_assert (0);
+ break;
+ }
+ }
+ GNUNET_CONTAINER_multihashmap_iterator_destroy (iter);
+
+ {
+ uint16_t noncontested;
+ noncontested = rfn_noncontested (input_rfn);
+ if (noncontested < (session->num_peers / 3) * 2)
+ {
+ gradecast_confidence = GNUNET_MIN(1, gradecast_confidence);
+ }
+ if (noncontested < (session->num_peers / 3) + 1)
+ {
+ gradecast_confidence = 0;
+ }
+ }
+
+ if (gradecast_confidence >= 1)
+ rfn_commit (output_rfn, task->key.leader);
+
+ if (gradecast_confidence <= 1)
+ session->peers_blacklisted[task->key.leader] = GNUNET_YES;
+
+ finish_task (task);
+}
+
+
+static void
+task_start_reconcile (struct TaskEntry *task)
+{
+ struct SetEntry *input;
+ struct SetOpCls *setop = &task->cls.setop;
+ struct ConsensusSession *session = task->step->session;
+
+ input = lookup_set (session, &setop->input_set);
+ GNUNET_assert (NULL != input);
+ GNUNET_assert (NULL != input->h);
+
+ /* We create the outputs for the operation here
+ (rather than in the set operation callback)
+ because we want something valid in there, even
+ if the other peer doesn't talk to us */
+
+ if (SET_KIND_NONE != setop->output_set.set_kind)
+ {
+ /* If we don't have an existing output set,
+ we clone the input set. */
+ if (NULL == lookup_set (session, &setop->output_set))
+ {
+ create_set_copy_for_task (task, &setop->input_set, &setop->output_set);
+ return;
+ }
+ }
+
+ if (RFN_KIND_NONE != setop->output_rfn.rfn_kind)
+ {
+ if (NULL == lookup_rfn (session, &setop->output_rfn))
+ {
+ struct ReferendumEntry *rfn;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "P%u: output rfn <%s> missing, creating.\n",
+ session->local_peer_idx,
+ debug_str_rfn_key (&setop->output_rfn));
+
+ rfn = rfn_create (session->num_peers);
+ rfn->key = setop->output_rfn;
+ put_rfn (session, rfn);
+ }
+ }
+
+ if (DIFF_KIND_NONE != setop->output_diff.diff_kind)
+ {
+ if (NULL == lookup_diff (session, &setop->output_diff))
+ {
+ struct DiffEntry *diff;
+
+ diff = diff_create ();
+ diff->key = setop->output_diff;
+ put_diff (session, diff);
+ }
+ }
+
+ if ( (task->key.peer1 == session->local_peer_idx) && (task->key.peer2 == session->local_peer_idx) )
+ {
+ /* XXX: mark the corresponding rfn as commited if necessary */
+ finish_task (task);
+ return;
+ }
+
+ if (task->key.peer1 == session->local_peer_idx)
+ {
+ struct GNUNET_CONSENSUS_RoundContextMessage rcm = { 0 };
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "P%u: Looking up set {%s} to run remote union\n",
+ session->local_peer_idx,
+ debug_str_set_key (&setop->input_set));
+
+ rcm.header.type = htons (GNUNET_MESSAGE_TYPE_CONSENSUS_P2P_ROUND_CONTEXT);
+ rcm.header.size = htons (sizeof (struct GNUNET_CONSENSUS_RoundContextMessage));
+
+ rcm.kind = htons (task->key.kind);
+ rcm.peer1 = htons (task->key.peer1);
+ rcm.peer2 = htons (task->key.peer2);
+ rcm.leader = htons (task->key.leader);
+ rcm.repetition = htons (task->key.repetition);
+
+ GNUNET_assert (NULL == setop->op);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "P%u: initiating set op with P%u, our set is %s\n",
+ session->local_peer_idx, task->key.peer2, debug_str_set_key (&setop->input_set));
+
+ struct GNUNET_SET_Option opts[] = {
+ { GNUNET_SET_OPTION_BYZANTINE, { .num = session->lower_bound } },
+ { GNUNET_SET_OPTION_END },
+ };
+
+ // XXX: maybe this should be done while
+ // setting up tasks alreays?
+ setop->op = GNUNET_SET_prepare (&session->peers[task->key.peer2],
+ &session->global_id,
+ &rcm.header,
+ GNUNET_SET_RESULT_SYMMETRIC,
+ opts,
+ set_result_cb,
+ task);
+
+ commit_set (session, task);
+ }
+ else if (task->key.peer2 == session->local_peer_idx)
+ {
+ /* Wait for the other peer to contact us */
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "P%u: waiting set op with P%u\n",
+ session->local_peer_idx, task->key.peer1);
+
+ if (NULL != setop->op)
+ {
+ commit_set (session, task);
+ }
+ }
+ else
+ {
+ /* We made an error while constructing the task graph. */
+ GNUNET_assert (0);
+ }
+}
+
+
+static void
+task_start_eval_echo (struct TaskEntry *task)
+{
+ struct GNUNET_CONTAINER_MultiHashMapIterator *iter;
+ struct ReferendumEntry *input_rfn;
+ struct RfnElementInfo *ri;
+ struct SetEntry *output_set;
+ struct SetMutationProgressCls *progress_cls;
+ struct ConsensusSession *session = task->step->session;
+ struct SetKey sk_in;
+ struct SetKey sk_out;
+ struct RfnKey rk_in;
+
+ sk_in = (struct SetKey) { SET_KIND_LEADER_PROPOSAL, task->key.repetition, task->key.leader };
+ sk_out = (struct SetKey) { SET_KIND_ECHO_RESULT, task->key.repetition, task->key.leader };
+ output_set = lookup_set (session, &sk_out);
+ if (NULL == output_set)
+ {
+ create_set_copy_for_task (task, &sk_in, &sk_out);
+ return;
+ }
+
+
+ {
+ // FIXME: should be marked as a shallow copy, so
+ // we can destroy everything correctly
+ struct SetEntry *last_set = GNUNET_new (struct SetEntry);
+ last_set->h = output_set->h;
+ last_set->key = (struct SetKey) { SET_KIND_LAST_GRADECAST };
+ put_set (session, last_set);
+ }
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Evaluating referendum in Task {%s}\n",
+ debug_str_task_key (&task->key));
+
+ progress_cls = GNUNET_new (struct SetMutationProgressCls);
+ progress_cls->task = task;
+
+ rk_in = (struct RfnKey) { RFN_KIND_ECHO, task->key.repetition, task->key.leader };
+ input_rfn = lookup_rfn (session, &rk_in);
+
+ GNUNET_assert (NULL != input_rfn);
+
+ iter = GNUNET_CONTAINER_multihashmap_iterator_create (input_rfn->rfn_elements);
+ GNUNET_assert (NULL != iter);
+
+ while (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap_iterator_next (iter,
+ NULL,
+ (const void **) &ri))
+ {
+ enum ReferendumVote majority_vote;
+ uint16_t majority_num;
+
+ rfn_majority (input_rfn, ri, &majority_num, &majority_vote);
+
+ if (majority_num < session->num_peers / 3)
+ {
+ /* It is not the case that all nonfaulty peers
+ echoed the same value. Since we're doing a set reconciliation, we
+ can't simply send "nothing" for the value. Thus we mark our 'confirm'
+ reconciliation as contested. Other peers might not know that the
+ leader is faulty, thus we still re-distribute in the confirmation
+ round. */
+ output_set->is_contested = GNUNET_YES;
+ }
+
+ switch (majority_vote)
+ {
+ case VOTE_ADD:
+ progress_cls->num_pending++;
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_SET_add_element (output_set->h,
+ ri->element,
+ set_mutation_done,
+ progress_cls));
+ break;
+ case VOTE_REMOVE:
+ progress_cls->num_pending++;
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_SET_remove_element (output_set->h,
+ ri->element,
+ set_mutation_done,
+ progress_cls));
+ break;
+ case VOTE_STAY:
+ /* Nothing to do. */
+ break;
+ default:
+ /* not reached */
+ GNUNET_assert (0);
+ }
+ }
+
+ GNUNET_CONTAINER_multihashmap_iterator_destroy (iter);
+
+ if (0 == progress_cls->num_pending)
+ {
+ // call closure right now, no pending ops
+ GNUNET_free (progress_cls);
+ finish_task (task);
+ }
+}
+
+
+static void
+task_start_finish (struct TaskEntry *task)
+{
+ struct SetEntry *final_set;
+ struct ConsensusSession *session = task->step->session;
+
+ final_set = lookup_set (session, &task->cls.finish.input_set);
+
+ GNUNET_assert (NULL != final_set);
+
+
+ GNUNET_SET_iterate (final_set->h,
+ send_to_client_iter,
+ task);
+}
+
+static void
+start_task (struct ConsensusSession *session, struct TaskEntry *task)
+{
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "P%u: starting task {%s}\n", session->local_peer_idx, debug_str_task_key (&task->key));
+
+ GNUNET_assert (GNUNET_NO == task->is_started);
+ GNUNET_assert (GNUNET_NO == task->is_finished);
+ GNUNET_assert (NULL != task->start);
+
+ task->start (task);
+
+ task->is_started = GNUNET_YES;
+}
+
+
+
+
+/*
+ * Run all steps of the session that don't any
+ * more dependencies.
+ */
+static void
+run_ready_steps (struct ConsensusSession *session)
+{
+ struct Step *step;
+
+ step = session->steps_head;
+
+ while (NULL != step)
+ {
+ if ( (GNUNET_NO == step->is_running) && (0 == step->pending_prereq) && (GNUNET_NO == step->is_finished) )
+ {
+ size_t i;
+
+ GNUNET_assert (0 == step->finished_tasks);
+
+#ifdef GNUNET_EXTRA_LOGGING
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "P%u: Running step `%s' of round %d with %d tasks and %d subordinates\n",
+ session->local_peer_idx,
+ step->debug_name,
+ step->round, step->tasks_len, step->subordinates_len);
+#endif
+
+ step->is_running = GNUNET_YES;
+ for (i = 0; i < step->tasks_len; i++)
+ start_task (session, step->tasks[i]);
+
+ /* Sometimes there is no task to trigger finishing the step, so we have to do it here. */
+ if ( (step->finished_tasks == step->tasks_len) && (GNUNET_NO == step->is_finished))
+ finish_step (step);
+
+ /* Running the next ready steps will be triggered by task completion */
+ return;
+ }
+ step = step->next;
+ }
+
+ return;
+}
+
+
+
+static void
+finish_task (struct TaskEntry *task)
+{
+ GNUNET_assert (GNUNET_NO == task->is_finished);
+ task->is_finished = GNUNET_YES;
+
+ task->step->finished_tasks++;
+
+ if (task->step->finished_tasks == task->step->tasks_len)
+ finish_step (task->step);
+}
+
+
+/**
+ * Search peer in the list of peers in session.
+ *
+ * @param peer peer to find
+ * @param session session with peer
+ * @return index of peer, -1 if peer is not in session
+ */
+static int
+get_peer_idx (const struct GNUNET_PeerIdentity *peer, const struct ConsensusSession *session)
+{
+ int i;
+ for (i = 0; i < session->num_peers; i++)
+ if (0 == memcmp (peer, &session->peers[i], sizeof (struct GNUNET_PeerIdentity)))
+ return i;
+ return -1;
+}
+
+
+/**
+ * Compute a global, (hopefully) unique consensus session id,
+ * from the local id of the consensus session, and the identities of all participants.
+ * Thus, if the local id of two consensus sessions coincide, but are not comprised of
+ * exactly the same peers, the global id will be different.
*
- * @param cli the client to send the next message to
+ * @param session session to generate the global id for
+ * @param local_session_id local id of the consensus session
*/
static void
-send_next (struct ConsensusSession *session)
+compute_global_id (struct ConsensusSession *session,
+ const struct GNUNET_HashCode *local_session_id)
{
-
- GNUNET_assert (NULL != session);
-
- if (NULL != session->th)
- return;
-
- if (NULL != session->client_messages_head)
- {
- int msize;
- msize = ntohs (session->client_messages_head->msg->size);
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "scheduling queued\n");
- session->th = GNUNET_SERVER_notify_transmit_ready (session->client, msize,
- GNUNET_TIME_UNIT_FOREVER_REL,
- &transmit_queued, session);
- }
+ const char *salt = "gnunet-service-consensus/session_id";
+
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CRYPTO_kdf (&session->global_id,
+ sizeof (struct GNUNET_HashCode),
+ salt,
+ strlen (salt),
+ session->peers,
+ session->num_peers * sizeof (struct GNUNET_PeerIdentity),
+ local_session_id,
+ sizeof (struct GNUNET_HashCode),
+ NULL));
}
/**
- * Although GNUNET_CRYPTO_hash_cmp exisits, it does not have
- * the correct signature to be used with e.g. qsort.
- * We use this function instead.
+ * Compare two peer identities.
*
- * @param h1 some hash code
- * @param h2 some hash code
+ * @param h1 some peer identity
+ * @param h2 some peer identity
* @return 1 if h1 > h2, -1 if h1 < h2 and 0 if h1 == h2.
*/
static int
-hash_cmp (const void *a, const void *b)
+peer_id_cmp (const void *h1, const void *h2)
{
- return GNUNET_CRYPTO_hash_cmp ((struct GNUNET_HashCode *) a, (struct GNUNET_HashCode *) b);
+ return memcmp (h1, h2, sizeof (struct GNUNET_PeerIdentity));
}
/**
- * Search peer in the list of peers in session.
+ * Create the sorted list of peers for the session,
+ * add the local peer if not in the join message.
*
- * @param peer peer to find
- * @param session session with peer
- * @return index of peer, -1 if peer is not in session
+ * @param session session to initialize
+ * @param join_msg join message with the list of peers participating at the end
*/
-static int
-get_peer_idx (const struct GNUNET_PeerIdentity *peer, const struct ConsensusSession *session)
+static void
+initialize_session_peer_list (struct ConsensusSession *session,
+ const struct GNUNET_CONSENSUS_JoinMessage *join_msg)
{
- const struct GNUNET_PeerIdentity *needle;
- needle = bsearch (peer, session->peers, session->num_peers, sizeof (struct GNUNET_PeerIdentity), &hash_cmp);
- if (NULL == needle)
- return -1;
- return needle - session->peers;
-}
+ const struct GNUNET_PeerIdentity *msg_peers
+ = (const struct GNUNET_PeerIdentity *) &join_msg[1];
+ int local_peer_in_list;
+ session->num_peers = ntohl (join_msg->num_peers);
+ /* Peers in the join message, may or may not include the local peer,
+ Add it if it is missing. */
+ local_peer_in_list = GNUNET_NO;
+ for (unsigned int i = 0; i < session->num_peers; i++)
+ {
+ if (0 == memcmp (&msg_peers[i],
+ &my_peer,
+ sizeof (struct GNUNET_PeerIdentity)))
+ {
+ local_peer_in_list = GNUNET_YES;
+ break;
+ }
+ }
+ if (GNUNET_NO == local_peer_in_list)
+ session->num_peers++;
-static void
-hello_cont (void *cls, enum GNUNET_STREAM_Status status, size_t size)
-{
- struct ConsensusPeerInformation *cpi;
+ session->peers = GNUNET_new_array (session->num_peers,
+ struct GNUNET_PeerIdentity);
+ if (GNUNET_NO == local_peer_in_list)
+ session->peers[session->num_peers - 1] = my_peer;
+
+ GNUNET_memcpy (session->peers,
+ msg_peers,
+ ntohl (join_msg->num_peers) * sizeof (struct GNUNET_PeerIdentity));
+ qsort (session->peers,
+ session->num_peers,
+ sizeof (struct GNUNET_PeerIdentity),
+ &peer_id_cmp);
+}
- cpi = (struct ConsensusPeerInformation *) cls;
- cpi->hello = GNUNET_YES;
-
- GNUNET_assert (GNUNET_STREAM_OK == status);
- cpi = (struct ConsensusPeerInformation *) cls;
+static struct TaskEntry *
+lookup_task (struct ConsensusSession *session,
+ struct TaskKey *key)
+{
+ struct GNUNET_HashCode hash;
- if (cpi->session->conclude_requested)
- {
- write_strata (cpi, GNUNET_STREAM_OK, 0);
- }
+
+ GNUNET_CRYPTO_hash (key, sizeof (struct TaskKey), &hash);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Looking up task hash %s\n",
+ GNUNET_h2s (&hash));
+ return GNUNET_CONTAINER_multihashmap_get (session->taskmap, &hash);
}
/**
- * Functions of this type will be called when a stream is established
+ * Called when another peer wants to do a set operation with the
+ * local peer.
*
- * @param cls the closure from GNUNET_STREAM_open
- * @param socket socket to use to communicate with the other side (read/write)
+ * @param cls closure
+ * @param other_peer the other peer
+ * @param context_msg message with application specific information from
+ * the other peer
+ * @param request request from the other peer, use GNUNET_SET_accept
+ * to accept it, otherwise the request will be refused
+ * Note that we don't use a return value here, as it is also
+ * necessary to specify the set we want to do the operation with,
+ * whith sometimes can be derived from the context message.
+ * Also necessary to specify the timeout.
*/
static void
-open_cb (void *cls, struct GNUNET_STREAM_Socket *socket)
+set_listen_cb (void *cls,
+ const struct GNUNET_PeerIdentity *other_peer,
+ const struct GNUNET_MessageHeader *context_msg,
+ struct GNUNET_SET_Request *request)
{
- struct ConsensusPeerInformation *cpi;
- struct ConsensusHello *hello;
+ struct ConsensusSession *session = cls;
+ struct TaskKey tk;
+ struct TaskEntry *task;
+ struct GNUNET_CONSENSUS_RoundContextMessage *cm;
+ if (NULL == context_msg)
+ {
+ GNUNET_break_op (0);
+ return;
+ }
- cpi = (struct ConsensusPeerInformation *) cls;
- cpi->is_connected = GNUNET_YES;
-
- hello = GNUNET_malloc (sizeof *hello);
- hello->header.size = htons (sizeof *hello);
- hello->header.type = htons (GNUNET_MESSAGE_TYPE_CONSENSUS_P2P_HELLO);
- memcpy (&hello->global_id, &cpi->session->global_id, sizeof (struct GNUNET_HashCode));
+ if (GNUNET_MESSAGE_TYPE_CONSENSUS_P2P_ROUND_CONTEXT != ntohs (context_msg->type))
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+ if (sizeof (struct GNUNET_CONSENSUS_RoundContextMessage) != ntohs (context_msg->size))
+ {
+ GNUNET_break_op (0);
+ return;
+ }
- cpi->wh =
- GNUNET_STREAM_write (socket, hello, sizeof *hello, GNUNET_TIME_UNIT_FOREVER_REL, hello_cont, cpi);
+ cm = (struct GNUNET_CONSENSUS_RoundContextMessage *) context_msg;
-}
+ tk = ((struct TaskKey) {
+ .kind = ntohs (cm->kind),
+ .peer1 = ntohs (cm->peer1),
+ .peer2 = ntohs (cm->peer2),
+ .repetition = ntohs (cm->repetition),
+ .leader = ntohs (cm->leader),
+ });
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "P%u: got req for task %s\n",
+ session->local_peer_idx, debug_str_task_key (&tk));
-static void
-initialize_session_info (struct ConsensusSession *session)
-{
- int i;
- int last;
+ task = lookup_task (session, &tk);
- for (i = 0; i < session->num_peers; ++i)
+ if (NULL == task)
{
- /* initialize back-references, so consensus peer information can
- * be used as closure */
- session->info[i].session = session;
+ GNUNET_break_op (0);
+ return;
+ }
+ if (GNUNET_YES == task->is_finished)
+ {
+ GNUNET_break_op (0);
+ return;
}
- last = (session->local_peer_idx + (session->num_peers / 2)) % session->num_peers;
- i = (session->local_peer_idx + 1) % session->num_peers;
- while (i != last)
+ if (task->key.peer2 != session->local_peer_idx)
{
- session->info[i].is_outgoing = GNUNET_YES;
- session->info[i].socket = GNUNET_STREAM_open (cfg, &session->peers[i], GNUNET_APPLICATION_TYPE_CONSENSUS,
- open_cb, &session->info[i], GNUNET_STREAM_OPTION_END);
- session->info[i].mst = GNUNET_SERVER_mst_create (mst_session_callback, session);
- i = (i + 1) % session->num_peers;
+ /* We're being asked, so we must be thne 2nd peer. */
+ GNUNET_break_op (0);
+ return;
}
- // tie-breaker for even number of peers
- if (((session->num_peers % 2) == 0) && (session->local_peer_idx < last))
+
+ GNUNET_assert (! ((task->key.peer1 == session->local_peer_idx) &&
+ (task->key.peer2 == session->local_peer_idx)));
+
+ struct GNUNET_SET_Option opts[] = {
+ { GNUNET_SET_OPTION_BYZANTINE, { .num = session->lower_bound } },
+ { GNUNET_SET_OPTION_END },
+ };
+
+ task->cls.setop.op = GNUNET_SET_accept (request,
+ GNUNET_SET_RESULT_SYMMETRIC,
+ opts,
+ set_result_cb,
+ task);
+
+ /* If the task hasn't been started yet,
+ we wait for that until we commit. */
+
+ if (GNUNET_YES == task->is_started)
{
- session->info[last].is_outgoing = GNUNET_YES;
- session->info[last].socket = GNUNET_STREAM_open (cfg, &session->peers[last], GNUNET_APPLICATION_TYPE_CONSENSUS,
- open_cb, &session->info[last], GNUNET_STREAM_OPTION_END);
+ commit_set (session, task);
}
}
-/**
- * Create the sorted list of peers for the session,
- * add the local peer if not in the join message.
- */
+
static void
-initialize_session_peer_list (struct ConsensusSession *session)
+put_task (struct GNUNET_CONTAINER_MultiHashMap *taskmap,
+ struct TaskEntry *t)
{
- int local_peer_in_list;
- int listed_peers;
- const struct GNUNET_PeerIdentity *msg_peers;
- unsigned int i;
+ struct GNUNET_HashCode round_hash;
+ struct Step *s;
- GNUNET_assert (NULL != session->join_msg);
+ GNUNET_assert (NULL != t->step);
- /* peers in the join message, may or may not include the local peer */
- listed_peers = ntohs (session->join_msg->num_peers);
-
- session->num_peers = listed_peers;
+ t = GNUNET_memdup (t, sizeof (struct TaskEntry));
- msg_peers = (struct GNUNET_PeerIdentity *) &session->join_msg[1];
+ s = t->step;
- local_peer_in_list = GNUNET_NO;
- for (i = 0; i < listed_peers; i++)
+ if (s->tasks_len == s->tasks_cap)
{
- if (0 == memcmp (&msg_peers[i], my_peer, sizeof (struct GNUNET_PeerIdentity)))
- {
- local_peer_in_list = GNUNET_YES;
- break;
- }
+ unsigned int target_size = 3 * (s->tasks_cap + 1) / 2;
+ GNUNET_array_grow (s->tasks,
+ s->tasks_cap,
+ target_size);
}
- if (GNUNET_NO == local_peer_in_list)
- session->num_peers++;
-
- session->peers = GNUNET_malloc (session->num_peers * sizeof (struct GNUNET_PeerIdentity));
+#ifdef GNUNET_EXTRA_LOGGING
+ GNUNET_assert (NULL != s->debug_name);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Putting task <%s> into step `%s'\n",
+ debug_str_task_key (&t->key),
+ s->debug_name);
+#endif
- if (GNUNET_NO == local_peer_in_list)
- session->peers[session->num_peers - 1] = *my_peer;
+ s->tasks[s->tasks_len] = t;
+ s->tasks_len++;
- memcpy (session->peers, msg_peers, listed_peers * sizeof (struct GNUNET_PeerIdentity));
- qsort (session->peers, session->num_peers, sizeof (struct GNUNET_PeerIdentity), &hash_cmp);
+ GNUNET_CRYPTO_hash (&t->key, sizeof (struct TaskKey), &round_hash);
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_CONTAINER_multihashmap_put (taskmap, &round_hash, t,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
}
static void
-strata_insert (struct InvertibleBloomFilter **strata, struct GNUNET_HashCode *key)
+install_step_timeouts (struct ConsensusSession *session)
{
- uint32_t v;
- int i;
- v = key->bits[0];
- /* count trailing '1'-bits of v */
- for (i = 0; v & 1; v>>=1, i++);
+ /* Given the fully constructed task graph
+ with rounds for tasks, we can give the tasks timeouts. */
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "strata insert at %d\n", i);
+ // unsigned int max_round;
- ibf_insert (strata[i], key);
+ /* XXX: implement! */
}
-/**
- * Initialize the session, continue receiving messages from the owning client
- *
- * @param session the session to initialize
+
+/*
+ * Arrange two peers in some canonical order.
*/
static void
-initialize_session (struct ConsensusSession *session)
+arrange_peers (uint16_t *p1, uint16_t *p2, uint16_t n)
{
- const struct ConsensusSession *other_session;
- int i;
-
- GNUNET_assert (NULL != session->join_msg);
-
- initialize_session_peer_list (session);
-
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "session with %u peers\n", session->num_peers);
+ uint16_t a;
+ uint16_t b;
- compute_global_id (&session->join_msg->session_id, session->peers, session->num_peers, &session->global_id);
+ GNUNET_assert (*p1 < n);
+ GNUNET_assert (*p2 < n);
- /* Check if some local client already owns the session. */
- other_session = sessions_head;
- while (NULL != other_session)
+ if (*p1 < *p2)
{
- if ((other_session != session) &&
- (0 == GNUNET_CRYPTO_hash_cmp (&session->global_id, &other_session->global_id)))
- {
- /* session already owned by another client */
- GNUNET_break (0);
- disconnect_client (session->client);
- return;
- }
- other_session = other_session->next;
+ a = *p1;
+ b = *p2;
+ }
+ else
+ {
+ a = *p2;
+ b = *p1;
}
- session->values = GNUNET_CONTAINER_multihashmap_create (256, GNUNET_NO);
+ /* For uniformly random *p1, *p2,
+ this condition is true with 50% chance */
+ if (((b - a) + n) % n <= n / 2)
+ {
+ *p1 = a;
+ *p2 = b;
+ }
+ else
+ {
+ *p1 = b;
+ *p2 = a;
+ }
+}
- session->local_peer_idx = get_peer_idx (my_peer, session);
- GNUNET_assert (-1 != session->local_peer_idx);
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "%d is the local peer\n", session->local_peer_idx);
+/**
+ * Record @a dep as a dependency of @a step.
+ */
+static void
+step_depend_on (struct Step *step, struct Step *dep)
+{
+ /* We're not checking for cyclic dependencies,
+ but this is a cheap sanity check. */
+ GNUNET_assert (step != dep);
+ GNUNET_assert (NULL != step);
+ GNUNET_assert (NULL != dep);
+ GNUNET_assert (dep->round <= step->round);
+
+#ifdef GNUNET_EXTRA_LOGGING
+ /* Make sure we have complete debugging information.
+ Also checks that we don't screw up too badly
+ constructing the task graph. */
+ GNUNET_assert (NULL != step->debug_name);
+ GNUNET_assert (NULL != dep->debug_name);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Making step `%s' depend on `%s'\n",
+ step->debug_name,
+ dep->debug_name);
+#endif
+
+ if (dep->subordinates_cap == dep->subordinates_len)
+ {
+ unsigned int target_size = 3 * (dep->subordinates_cap + 1) / 2;
+ GNUNET_array_grow (dep->subordinates,
+ dep->subordinates_cap,
+ target_size);
+ }
- session->strata = GNUNET_malloc (STRATA_COUNT * sizeof (struct InvertibleBloomFilter *));
- for (i = 0; i < STRATA_COUNT; i++)
- session->strata[i] = ibf_create (STRATA_IBF_BUCKETS, STRATA_HASH_NUM, 0);
+ GNUNET_assert (dep->subordinates_len <= dep->subordinates_cap);
- session->info = GNUNET_malloc (session->num_peers * sizeof (struct ConsensusPeerInformation));
+ dep->subordinates[dep->subordinates_len] = step;
+ dep->subordinates_len++;
- initialize_session_info (session);
+ step->pending_prereq++;
+}
- GNUNET_free (session->join_msg);
- session->join_msg = NULL;
- GNUNET_SERVER_receive_done (session->client, GNUNET_OK);
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "session %s initialized\n", GNUNET_h2s (&session->global_id));
+static struct Step *
+create_step (struct ConsensusSession *session, int round, int early_finishable)
+{
+ struct Step *step;
+ step = GNUNET_new (struct Step);
+ step->session = session;
+ step->round = round;
+ step->early_finishable = early_finishable;
+ GNUNET_CONTAINER_DLL_insert_tail (session->steps_head,
+ session->steps_tail,
+ step);
+ return step;
}
/**
- * Called when a client wants to join a consensus session.
- *
- * @param cls unused
- * @param client client that sent the message
- * @param m message sent by the client
+ * Construct the task graph for a single
+ * gradecast.
*/
static void
-client_join (void *cls,
- struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *m)
+construct_task_graph_gradecast (struct ConsensusSession *session,
+ uint16_t rep,
+ uint16_t lead,
+ struct Step *step_before,
+ struct Step *step_after)
{
- struct ConsensusSession *session;
+ uint16_t n = session->num_peers;
+ uint16_t me = session->local_peer_idx;
+
+ uint16_t p1;
+ uint16_t p2;
+
+ /* The task we're currently setting up. */
+ struct TaskEntry task;
+
+ struct Step *step;
+ struct Step *prev_step;
+
+ uint16_t round;
+
+ unsigned int k;
+
+ round = step_before->round + 1;
+
+ /* gcast step 1: leader disseminates */
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "join received\n");
+ step = create_step (session, round, GNUNET_YES);
- // make sure the client has not already joined a session
- session = sessions_head;
- while (NULL != session)
+#ifdef GNUNET_EXTRA_LOGGING
+ GNUNET_asprintf (&step->debug_name, "disseminate leader %u rep %u", lead, rep);
+#endif
+ step_depend_on (step, step_before);
+
+ if (lead == me)
{
- if (session->client == client)
+ for (k = 0; k < n; k++)
{
- GNUNET_break (0);
- disconnect_client (client);
- return;
+ if (k == me)
+ continue;
+ p1 = me;
+ p2 = k;
+ arrange_peers (&p1, &p2, n);
+ task = ((struct TaskEntry) {
+ .step = step,
+ .start = task_start_reconcile,
+ .cancel = task_cancel_reconcile,
+ .key = (struct TaskKey) { PHASE_KIND_GRADECAST_LEADER, p1, p2, rep, me },
+ });
+ task.cls.setop.input_set = (struct SetKey) { SET_KIND_CURRENT, rep };
+ put_task (session->taskmap, &task);
}
- session = session->next;
+ /* We run this task to make sure that the leader
+ has the stored the SET_KIND_LEADER set of himself,
+ so he can participate in the rest of the gradecast
+ without the code having to handle any special cases. */
+ task = ((struct TaskEntry) {
+ .step = step,
+ .key = (struct TaskKey) { PHASE_KIND_GRADECAST_LEADER, me, me, rep, me },
+ .start = task_start_reconcile,
+ .cancel = task_cancel_reconcile,
+ });
+ task.cls.setop.input_set = (struct SetKey) { SET_KIND_CURRENT, rep };
+ task.cls.setop.output_set = (struct SetKey) { SET_KIND_LEADER_PROPOSAL, rep, me };
+ task.cls.setop.output_diff = (struct DiffKey) { DIFF_KIND_LEADER_PROPOSAL, rep, me };
+ put_task (session->taskmap, &task);
+ }
+ else
+ {
+ p1 = me;
+ p2 = lead;
+ arrange_peers (&p1, &p2, n);
+ task = ((struct TaskEntry) {
+ .step = step,
+ .key = (struct TaskKey) { PHASE_KIND_GRADECAST_LEADER, p1, p2, rep, lead },
+ .start = task_start_reconcile,
+ .cancel = task_cancel_reconcile,
+ });
+ task.cls.setop.input_set = (struct SetKey) { SET_KIND_CURRENT, rep };
+ task.cls.setop.output_set = (struct SetKey) { SET_KIND_LEADER_PROPOSAL, rep, lead };
+ task.cls.setop.output_diff = (struct DiffKey) { DIFF_KIND_LEADER_PROPOSAL, rep, lead };
+ put_task (session->taskmap, &task);
}
- session = GNUNET_malloc (sizeof (struct ConsensusSession));
- session->join_msg = (struct GNUNET_CONSENSUS_JoinMessage *) GNUNET_copy_message (m);
- session->client = client;
- GNUNET_SERVER_client_keep (client);
+ /* gcast phase 2: echo */
+ prev_step = step;
+ round += 1;
+ step = create_step (session, round, GNUNET_YES);
+#ifdef GNUNET_EXTRA_LOGGING
+ GNUNET_asprintf (&step->debug_name, "echo leader %u rep %u", lead, rep);
+#endif
+ step_depend_on (step, prev_step);
- GNUNET_CONTAINER_DLL_insert (sessions_head, sessions_tail, session);
+ for (k = 0; k < n; k++)
+ {
+ p1 = k;
+ p2 = me;
+ arrange_peers (&p1, &p2, n);
+ task = ((struct TaskEntry) {
+ .step = step,
+ .key = (struct TaskKey) { PHASE_KIND_GRADECAST_ECHO, p1, p2, rep, lead },
+ .start = task_start_reconcile,
+ .cancel = task_cancel_reconcile,
+ });
+ task.cls.setop.input_set = (struct SetKey) { SET_KIND_LEADER_PROPOSAL, rep, lead };
+ task.cls.setop.output_rfn = (struct RfnKey) { RFN_KIND_ECHO, rep, lead };
+ put_task (session->taskmap, &task);
+ }
- // Initialize session later if local peer identity is not known yet.
- if (NULL == my_peer)
+ prev_step = step;
+ /* Same round, since step only has local tasks */
+ step = create_step (session, round, GNUNET_YES);
+#ifdef GNUNET_EXTRA_LOGGING
+ GNUNET_asprintf (&step->debug_name, "echo grade leader %u rep %u", lead, rep);
+#endif
+ step_depend_on (step, prev_step);
+
+ arrange_peers (&p1, &p2, n);
+ task = ((struct TaskEntry) {
+ .key = (struct TaskKey) { PHASE_KIND_GRADECAST_ECHO_GRADE, -1, -1, rep, lead },
+ .step = step,
+ .start = task_start_eval_echo
+ });
+ put_task (session->taskmap, &task);
+
+ prev_step = step;
+ round += 1;
+ step = create_step (session, round, GNUNET_YES);
+#ifdef GNUNET_EXTRA_LOGGING
+ GNUNET_asprintf (&step->debug_name, "confirm leader %u rep %u", lead, rep);
+#endif
+ step_depend_on (step, prev_step);
+
+ /* gcast phase 3: confirmation and grading */
+ for (k = 0; k < n; k++)
{
- GNUNET_SERVER_disable_receive_done_warning (client);
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "session init delayed\n");
- return;
+ p1 = k;
+ p2 = me;
+ arrange_peers (&p1, &p2, n);
+ task = ((struct TaskEntry) {
+ .step = step,
+ .start = task_start_reconcile,
+ .cancel = task_cancel_reconcile,
+ .key = (struct TaskKey) { PHASE_KIND_GRADECAST_CONFIRM, p1, p2, rep, lead},
+ });
+ task.cls.setop.input_set = (struct SetKey) { SET_KIND_ECHO_RESULT, rep, lead };
+ task.cls.setop.output_rfn = (struct RfnKey) { RFN_KIND_CONFIRM, rep, lead };
+ /* If there was at least one element in the echo round that was
+ contested (i.e. it had no n-t majority), then we let the other peers
+ know, and other peers let us know. The contested flag for each peer is
+ stored in the rfn. */
+ task.cls.setop.transceive_contested = GNUNET_YES;
+ put_task (session->taskmap, &task);
}
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "session init now\n");
- initialize_session (session);
+ prev_step = step;
+ /* Same round, since step only has local tasks */
+ step = create_step (session, round, GNUNET_YES);
+#ifdef GNUNET_EXTRA_LOGGING
+ GNUNET_asprintf (&step->debug_name, "confirm grade leader %u rep %u", lead, rep);
+#endif
+ step_depend_on (step, prev_step);
+
+ task = ((struct TaskEntry) {
+ .step = step,
+ .key = (struct TaskKey) { PHASE_KIND_GRADECAST_CONFIRM_GRADE, -1, -1, rep, lead },
+ .start = task_start_grade,
+ });
+ put_task (session->taskmap, &task);
+
+ step_depend_on (step_after, step);
}
-/**
- * Called when a client performs an insert operation.
- *
- * @param cls (unused)
- * @param client client handle
- * @param message message sent by the client
- */
-void
-client_insert (void *cls,
- struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *m)
+static void
+construct_task_graph (struct ConsensusSession *session)
{
- struct ConsensusSession *session;
- struct GNUNET_CONSENSUS_ElementMessage *msg;
- struct GNUNET_CONSENSUS_Element *element;
- struct GNUNET_HashCode key;
- int element_size;
-
- GNUNET_log(GNUNET_ERROR_TYPE_INFO, "insert\n");
+ uint16_t n = session->num_peers;
+ uint16_t t = n / 3;
- session = sessions_head;
- while (NULL != session)
- {
- if (session->client == client)
- break;
- }
-
- if (NULL == session)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "client tried to insert, but client is not in any session\n");
- GNUNET_SERVER_client_disconnect (client);
- return;
- }
+ uint16_t me = session->local_peer_idx;
- msg = (struct GNUNET_CONSENSUS_ElementMessage *) m;
- element_size = msg->header.size - sizeof (struct GNUNET_CONSENSUS_ElementMessage);
+ /* The task we're currently setting up. */
+ struct TaskEntry task;
- element = GNUNET_malloc (sizeof (struct GNUNET_CONSENSUS_Element) + element_size);
+ /* Current leader */
+ unsigned int lead;
- element->type = msg->element_type;
- element->size = element_size;
- memcpy (&element[1], &msg[1], element_size);
- element->data = &element[1];
+ struct Step *step;
+ struct Step *prev_step;
- GNUNET_CRYPTO_hash (element, element_size, &key);
+ unsigned int round = 0;
- GNUNET_CONTAINER_multihashmap_put (session->values, &key, element,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
+ unsigned int i;
- strata_insert (session->strata, &key);
+ // XXX: introduce first step,
+ // where we wait for all insert acks
+ // from the set service
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ /* faster but brittle all-to-all */
- send_next (session);
-}
+ // XXX: Not implemented yet
+ /* all-to-all step */
+ step = create_step (session, round, GNUNET_NO);
-/**
- * Functions of this signature are called whenever writing operations
- * on a stream are executed
- *
- * @param cls the closure from GNUNET_STREAM_write
- * @param status the status of the stream at the time this function is called;
- * GNUNET_STREAM_OK if writing to stream was completed successfully;
- * GNUNET_STREAM_TIMEOUT if the given data is not sent successfully
- * (this doesn't mean that the data is never sent, the receiver may
- * have read the data but its ACKs may have been lost);
- * GNUNET_STREAM_SHUTDOWN if the stream is shutdown for writing in the
- * mean time; GNUNET_STREAM_SYSERR if the stream is broken and cannot
- * be processed.
- * @param size the number of bytes written
- */
-static void
-write_strata (void *cls, enum GNUNET_STREAM_Status status, size_t size)
-{
- struct ConsensusPeerInformation *cpi;
- struct StrataMessage *strata_msg;
- size_t msize;
- int i;
- struct GNUNET_HashCode *hash_dst;
- uint8_t *count_dst;
- int num_strata;
+#ifdef GNUNET_EXTRA_LOGGING
+ step->debug_name = GNUNET_strdup ("all to all");
+#endif
- cpi = (struct ConsensusPeerInformation *) cls;
+ for (i = 0; i < n; i++)
+ {
+ uint16_t p1;
+ uint16_t p2;
+
+ p1 = me;
+ p2 = i;
+ arrange_peers (&p1, &p2, n);
+ task = ((struct TaskEntry) {
+ .key = (struct TaskKey) { PHASE_KIND_ALL_TO_ALL, p1, p2, -1, -1 },
+ .step = step,
+ .start = task_start_reconcile,
+ .cancel = task_cancel_reconcile,
+ });
+ task.cls.setop.input_set = (struct SetKey) { SET_KIND_CURRENT, 0 };
+ task.cls.setop.output_set = task.cls.setop.input_set;
+ task.cls.setop.do_not_remove = GNUNET_YES;
+ put_task (session->taskmap, &task);
+ }
- GNUNET_assert (GNUNET_YES == cpi->is_outgoing);
+ round += 1;
+ prev_step = step;
+ step = create_step (session, round, GNUNET_NO);;
+#ifdef GNUNET_EXTRA_LOGGING
+ step->debug_name = GNUNET_strdup ("all to all 2");
+#endif
+ step_depend_on (step, prev_step);
- /* FIXME: handle this */
- GNUNET_assert (GNUNET_STREAM_OK == status);
- if (STRATA_COUNT == cpi->strata_counter)
+ for (i = 0; i < n; i++)
{
- /* strata have been written, wait for other side's IBF */
- return;
+ uint16_t p1;
+ uint16_t p2;
+
+ p1 = me;
+ p2 = i;
+ arrange_peers (&p1, &p2, n);
+ task = ((struct TaskEntry) {
+ .key = (struct TaskKey) { PHASE_KIND_ALL_TO_ALL_2, p1, p2, -1, -1 },
+ .step = step,
+ .start = task_start_reconcile,
+ .cancel = task_cancel_reconcile,
+ });
+ task.cls.setop.input_set = (struct SetKey) { SET_KIND_CURRENT, 0 };
+ task.cls.setop.output_set = task.cls.setop.input_set;
+ task.cls.setop.do_not_remove = GNUNET_YES;
+ put_task (session->taskmap, &task);
}
- if ((STRATA_COUNT - cpi->strata_counter) < STRATA_PER_MESSAGE)
- num_strata = (STRATA_COUNT - cpi->strata_counter);
- else
- num_strata = STRATA_PER_MESSAGE;
+ round += 1;
+ prev_step = step;
+ step = NULL;
- msize = (sizeof *strata_msg) + (num_strata * IBF_BUCKET_SIZE * STRATA_IBF_BUCKETS);
- strata_msg = GNUNET_malloc (msize);
- strata_msg->header.size = htons (msize);
- strata_msg->header.type = htons (GNUNET_MESSAGE_TYPE_CONSENSUS_P2P_DELTA_ESTIMATE);
- strata_msg->num_strata = htons (num_strata);
- /* for correct message alignment, copy bucket types seperately */
- hash_dst = (struct GNUNET_HashCode *) &strata_msg[1];
+ /* Byzantine union */
- for (i = 0; i < num_strata; i++)
+ /* sequential repetitions of the gradecasts */
+ for (i = 0; i < t + 1; i++)
{
- memcpy (hash_dst, cpi->session->strata[cpi->strata_counter+i]->hash_sum, STRATA_IBF_BUCKETS * sizeof *hash_dst);
- hash_dst += STRATA_IBF_BUCKETS;
+ struct Step *step_rep_start;
+ struct Step *step_rep_end;
+
+ /* Every repetition is in a separate round. */
+ step_rep_start = create_step (session, round, GNUNET_YES);
+#ifdef GNUNET_EXTRA_LOGGING
+ GNUNET_asprintf (&step_rep_start->debug_name, "gradecast start rep %u", i);
+#endif
+
+ step_depend_on (step_rep_start, prev_step);
+
+ /* gradecast has three rounds */
+ round += 3;
+ step_rep_end = create_step (session, round, GNUNET_YES);
+#ifdef GNUNET_EXTRA_LOGGING
+ GNUNET_asprintf (&step_rep_end->debug_name, "gradecast end rep %u", i);
+#endif
+
+ /* parallel gradecasts */
+ for (lead = 0; lead < n; lead++)
+ construct_task_graph_gradecast (session, i, lead, step_rep_start, step_rep_end);
+
+ task = ((struct TaskEntry) {
+ .step = step_rep_end,
+ .key = (struct TaskKey) { PHASE_KIND_APPLY_REP, -1, -1, i, -1},
+ .start = task_start_apply_round,
+ });
+ put_task (session->taskmap, &task);
+
+ prev_step = step_rep_end;
}
- for (i = 0; i < num_strata; i++)
+ /* There is no next gradecast round, thus the final
+ start step is the overall end step of the gradecasts */
+ round += 1;
+ step = create_step (session, round, GNUNET_NO);
+#ifdef GNUNET_EXTRA_LOGGING
+ GNUNET_asprintf (&step->debug_name, "finish");
+#endif
+ step_depend_on (step, prev_step);
+
+ task = ((struct TaskEntry) {
+ .step = step,
+ .key = (struct TaskKey) { PHASE_KIND_FINISH, -1, -1, -1, -1 },
+ .start = task_start_finish,
+ });
+ task.cls.finish.input_set = (struct SetKey) { SET_KIND_LAST_GRADECAST };
+
+ put_task (session->taskmap, &task);
+}
+
+
+
+/**
+ * Check join message.
+ *
+ * @param cls session of client that sent the message
+ * @param m message sent by the client
+ * @return #GNUNET_OK if @a m is well-formed
+ */
+static int
+check_client_join (void *cls,
+ const struct GNUNET_CONSENSUS_JoinMessage *m)
+{
+ uint32_t listed_peers = ntohl (m->num_peers);
+
+ if ( (ntohs (m->header.size) - sizeof (*m)) !=
+ listed_peers * sizeof (struct GNUNET_PeerIdentity))
{
- memcpy (hash_dst, cpi->session->strata[cpi->strata_counter+i]->id_sum, STRATA_IBF_BUCKETS * sizeof *hash_dst);
- hash_dst += STRATA_IBF_BUCKETS;
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
}
+ return GNUNET_OK;
+}
- count_dst = (uint8_t *) hash_dst;
- for (i = 0; i < num_strata; i++)
+/**
+ * Called when a client wants to join a consensus session.
+ *
+ * @param cls session of client that sent the message
+ * @param m message sent by the client
+ */
+static void
+handle_client_join (void *cls,
+ const struct GNUNET_CONSENSUS_JoinMessage *m)
+{
+ struct ConsensusSession *session = cls;
+ struct ConsensusSession *other_session;
+
+ initialize_session_peer_list (session,
+ m);
+ compute_global_id (session,
+ &m->session_id);
+
+ /* Check if some local client already owns the session.
+ It is only legal to have a session with an existing global id
+ if all other sessions with this global id are finished.*/
+ for (other_session = sessions_head;
+ NULL != other_session;
+ other_session = other_session->next)
{
- memcpy (count_dst, cpi->session->strata[cpi->strata_counter+i]->count, STRATA_IBF_BUCKETS);
- count_dst += STRATA_IBF_BUCKETS;
+ if ( (other_session != session) &&
+ (0 == GNUNET_CRYPTO_hash_cmp (&session->global_id,
+ &other_session->global_id)) )
+ break;
}
- cpi->strata_counter += num_strata;
+ session->conclude_deadline
+ = GNUNET_TIME_absolute_ntoh (m->deadline);
+ session->conclude_start
+ = GNUNET_TIME_absolute_ntoh (m->start);
+ session->local_peer_idx = get_peer_idx (&my_peer,
+ session);
+ GNUNET_assert (-1 != session->local_peer_idx);
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Joining consensus session %s containing %u peers as %u with timeout %s\n",
+ GNUNET_h2s (&m->session_id),
+ session->num_peers,
+ session->local_peer_idx,
+ GNUNET_STRINGS_relative_time_to_string
+ (GNUNET_TIME_absolute_get_difference (session->conclude_start,
+ session->conclude_deadline),
+ GNUNET_YES));
+
+ session->set_listener
+ = GNUNET_SET_listen (cfg,
+ GNUNET_SET_OPERATION_UNION,
+ &session->global_id,
+ &set_listen_cb,
+ session);
+
+ session->setmap = GNUNET_CONTAINER_multihashmap_create (1,
+ GNUNET_NO);
+ session->taskmap = GNUNET_CONTAINER_multihashmap_create (1,
+ GNUNET_NO);
+ session->diffmap = GNUNET_CONTAINER_multihashmap_create (1,
+ GNUNET_NO);
+ session->rfnmap = GNUNET_CONTAINER_multihashmap_create (1,
+ GNUNET_NO);
+
+ {
+ struct SetEntry *client_set;
+
+ client_set = GNUNET_new (struct SetEntry);
+ client_set->h = GNUNET_SET_create (cfg,
+ GNUNET_SET_OPERATION_UNION);
+ client_set->key = ((struct SetKey) { SET_KIND_CURRENT, 0, 0 });
+ put_set (session,
+ client_set);
+ }
- cpi->wh = GNUNET_STREAM_write (cpi->socket, strata_msg, msize, GNUNET_TIME_UNIT_FOREVER_REL,
- write_strata, cpi);
+ session->peers_blacklisted = GNUNET_new_array (session->num_peers,
+ int);
- GNUNET_assert (NULL != cpi->wh);
+ /* Just construct the task graph,
+ but don't run anything until the client calls conclude. */
+ construct_task_graph (session);
+ GNUNET_SERVICE_client_continue (session->client);
}
-/**
- * Functions of this signature are called whenever writing operations
- * on a stream are executed
- *
- * @param cls the closure from GNUNET_STREAM_write
- * @param status the status of the stream at the time this function is called;
- * GNUNET_STREAM_OK if writing to stream was completed successfully;
- * GNUNET_STREAM_TIMEOUT if the given data is not sent successfully
- * (this doesn't mean that the data is never sent, the receiver may
- * have read the data but its ACKs may have been lost);
- * GNUNET_STREAM_SHUTDOWN if the stream is shutdown for writing in the
- * mean time; GNUNET_STREAM_SYSERR if the stream is broken and cannot
- * be processed.
- * @param size the number of bytes written
- */
-static void
-write_ibf (void *cls, enum GNUNET_STREAM_Status status, size_t size)
+static void
+client_insert_done (void *cls)
{
- struct ConsensusPeerInformation *cpi;
-
- cpi = (struct ConsensusPeerInformation *) cls;
+ // FIXME: implement
}
/**
- * Functions of this signature are called whenever writing operations
- * on a stream are executed
+ * Called when a client performs an insert operation.
*
- * @param cls the closure from GNUNET_STREAM_write
- * @param status the status of the stream at the time this function is called;
- * GNUNET_STREAM_OK if writing to stream was completed successfully;
- * GNUNET_STREAM_TIMEOUT if the given data is not sent successfully
- * (this doesn't mean that the data is never sent, the receiver may
- * have read the data but its ACKs may have been lost);
- * GNUNET_STREAM_SHUTDOWN if the stream is shutdown for writing in the
- * mean time; GNUNET_STREAM_SYSERR if the stream is broken and cannot
- * be processed.
- * @param size the number of bytes written
+ * @param cls client handle
+ * @param msg message sent by the client
+ * @return #GNUNET_OK (always well-formed)
*/
-static void
-write_values (void *cls, enum GNUNET_STREAM_Status status, size_t size)
+static int
+check_client_insert (void *cls,
+ const struct GNUNET_CONSENSUS_ElementMessage *msg)
{
- struct ConsensusPeerInformation *cpi;
-
- cpi = (struct ConsensusPeerInformation *) cls;
+ return GNUNET_OK;
}
/**
- * Called when a client performs the conclude operation.
+ * Called when a client performs an insert operation.
*
- * @param cls (unused)
- * @param client client handle
- * @param message message sent by the client
+ * @param cls client handle
+ * @param msg message sent by the client
*/
-void
-client_conclude (void *cls,
- struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
+static void
+handle_client_insert (void *cls,
+ const struct GNUNET_CONSENSUS_ElementMessage *msg)
{
- struct ConsensusSession *session;
- int i;
+ struct ConsensusSession *session = cls;
+ ssize_t element_size;
+ struct GNUNET_SET_Handle *initial_set;
+ struct ConsensusElement *ce;
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "conclude requested\n");
-
- session = sessions_head;
- while ((session != NULL) && (session->client != client))
- session = session->next;
- if (NULL == session)
+ if (GNUNET_YES == session->conclude_started)
{
- /* client not found */
GNUNET_break (0);
- GNUNET_SERVER_client_disconnect (client);
+ GNUNET_SERVICE_client_drop (session->client);
return;
}
- if (GNUNET_YES == session->conclude_requested)
+ element_size = ntohs (msg->header.size) - sizeof (struct GNUNET_CONSENSUS_ElementMessage);
+ ce = GNUNET_malloc (sizeof (struct ConsensusElement) + element_size);
+ GNUNET_memcpy (&ce[1], &msg[1], element_size);
+ ce->payload_type = msg->element_type;
+
+ struct GNUNET_SET_Element element = {
+ .element_type = GNUNET_BLOCK_TYPE_CONSENSUS_ELEMENT,
+ .size = sizeof (struct ConsensusElement) + element_size,
+ .data = ce,
+ };
+
{
- /* client requested conclude twice */
- GNUNET_break (0);
- disconnect_client (client);
- return;
- }
+ struct SetKey key = { SET_KIND_CURRENT, 0, 0 };
+ struct SetEntry *entry;
- session->conclude_requested = GNUNET_YES;
+ entry = lookup_set (session,
+ &key);
+ GNUNET_assert (NULL != entry);
+ initial_set = entry->h;
+ }
- /* FIXME: write to already connected sockets */
+ session->num_client_insert_pending++;
+ GNUNET_SET_add_element (initial_set,
+ &element,
+ &client_insert_done,
+ session);
- for (i = 0; i < session->num_peers; i++)
+#ifdef GNUNET_EXTRA_LOGGING
{
- if ( (GNUNET_YES == session->info[i].is_outgoing) &&
- (GNUNET_YES == session->info[i].hello) )
- {
- /* kick off transmitting strata by calling the write continuation */
- write_strata (&session->info[i], GNUNET_STREAM_OK, 0);
- }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "P%u: element %s added\n",
+ session->local_peer_idx,
+ debug_str_element (&element));
}
-
-
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
- send_next (session);
+#endif
+ GNUNET_free (ce);
+ GNUNET_SERVICE_client_continue (session->client);
}
/**
- * Called when a client sends an ack
+ * Called when a client performs the conclude operation.
*
- * @param cls (unused)
- * @param client client handle
+ * @param cls client handle
* @param message message sent by the client
*/
-void
-client_ack (void *cls,
- struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
-{
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "client ack received\n");
-}
-
-/**
- * Task that disconnects from core.
- *
- * @param cls core handle
- * @param tc context information (why was this task triggered now)
- */
-static void
-disconnect_core (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- GNUNET_CORE_disconnect (core);
- core = NULL;
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "disconnected from core\n");
-}
-
-
static void
-core_startup (void *cls,
- struct GNUNET_CORE_Handle *core,
- const struct GNUNET_PeerIdentity *peer)
+handle_client_conclude (void *cls,
+ const struct GNUNET_MessageHeader *message)
{
- struct ConsensusSession *session;
-
- my_peer = GNUNET_memdup(peer, sizeof (struct GNUNET_PeerIdentity));
- /* core can't be disconnected directly in the core startup callback, schedule a task to do it! */
- GNUNET_SCHEDULER_add_now (&disconnect_core, core);
- GNUNET_log(GNUNET_ERROR_TYPE_INFO, "connected to core\n");
+ struct ConsensusSession *session = cls;
- session = sessions_head;
- while (NULL != session)
+ if (GNUNET_YES == session->conclude_started)
{
- if (NULL != session->join_msg)
- initialize_session (session);
- session = session->next;
+ /* conclude started twice */
+ GNUNET_break (0);
+ GNUNET_SERVICE_client_drop (session->client);
+ return;
}
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "conclude requested\n");
+ session->conclude_started = GNUNET_YES;
+ install_step_timeouts (session);
+ run_ready_steps (session);
+ GNUNET_SERVICE_client_continue (session->client);
}
* Called to clean up, after a shutdown has been requested.
*
* @param cls closure
- * @param tc context information (why was this task triggered now)
*/
static void
-shutdown_task (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+shutdown_task (void *cls)
{
- while (NULL != sessions_head)
- {
- struct ConsensusSession *session;
- session = sessions_head;
- sessions_head = sessions_head->next;
- GNUNET_free (session);
- }
-
- if (NULL != core)
- {
- GNUNET_CORE_disconnect (core);
- core = NULL;
- }
-
- if (NULL != listener)
- {
- GNUNET_STREAM_listen_close (listener);
- listener = NULL;
- }
-
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "handled shutdown request\n");
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "shutting down\n");
+ GNUNET_STATISTICS_destroy (statistics,
+ GNUNET_NO);
+ statistics = NULL;
}
* Start processing consensus requests.
*
* @param cls closure
- * @param server the initialized server
* @param c configuration to use
+ * @param service the initialized service
*/
static void
-run (void *cls, struct GNUNET_SERVER_Handle *server, const struct GNUNET_CONFIGURATION_Handle *c)
+run (void *cls,
+ const struct GNUNET_CONFIGURATION_Handle *c,
+ struct GNUNET_SERVICE_Handle *service)
{
- static const struct GNUNET_CORE_MessageHandler core_handlers[] = {
- {NULL, 0, 0}
- };
- static const struct GNUNET_SERVER_MessageHandler server_handlers[] = {
- {&client_join, NULL, GNUNET_MESSAGE_TYPE_CONSENSUS_CLIENT_JOIN, 0},
- {&client_insert, NULL, GNUNET_MESSAGE_TYPE_CONSENSUS_CLIENT_INSERT, 0},
- {&client_conclude, NULL, GNUNET_MESSAGE_TYPE_CONSENSUS_CLIENT_CONCLUDE,
- sizeof (struct GNUNET_CONSENSUS_ConcludeMessage)},
- {&client_ack, NULL, GNUNET_MESSAGE_TYPE_CONSENSUS_CLIENT_ACK,
- sizeof (struct GNUNET_CONSENSUS_AckMessage)},
- {NULL, NULL, 0, 0}
- };
-
cfg = c;
- srv = server;
-
- GNUNET_SERVER_add_handlers (server, server_handlers);
-
- GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task, NULL);
-
-
- listener = GNUNET_STREAM_listen (cfg, GNUNET_APPLICATION_TYPE_CONSENSUS,
- listen_cb, NULL,
- GNUNET_STREAM_OPTION_END);
-
+ if (GNUNET_OK !=
+ GNUNET_CRYPTO_get_peer_identity (cfg,
+ &my_peer))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Could not retrieve host identity\n");
+ GNUNET_SCHEDULER_shutdown ();
+ return;
+ }
+ statistics = GNUNET_STATISTICS_create ("consensus",
+ cfg);
+ GNUNET_SCHEDULER_add_shutdown (&shutdown_task,
+ NULL);
+}
- /* we have to wait for the core_startup callback before proceeding with the consensus service startup */
- core = GNUNET_CORE_connect (c, NULL, &core_startup, NULL, NULL, NULL, GNUNET_NO, NULL, GNUNET_NO, core_handlers);
- GNUNET_assert (NULL != core);
- GNUNET_log(GNUNET_ERROR_TYPE_INFO, "consensus running\n");
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "strata per msg: %d\n", STRATA_PER_MESSAGE);
+/**
+ * Callback called when a client connects to the service.
+ *
+ * @param cls closure for the service
+ * @param c the new client that connected to the service
+ * @param mq the message queue used to send messages to the client
+ * @return @a c
+ */
+static void *
+client_connect_cb (void *cls,
+ struct GNUNET_SERVICE_Client *c,
+ struct GNUNET_MQ_Handle *mq)
+{
+ struct ConsensusSession *session = GNUNET_new (struct ConsensusSession);
+
+ session->client = c;
+ session->client_mq = mq;
+ GNUNET_CONTAINER_DLL_insert (sessions_head,
+ sessions_tail,
+ session);
+ return session;
}
/**
- * The main function for the consensus service.
+ * Callback called when a client disconnected from the service
*
- * @param argc number of arguments from the command line
- * @param argv command line arguments
- * @return 0 ok, 1 on error
+ * @param cls closure for the service
+ * @param c the client that disconnected
+ * @param internal_cls should be equal to @a c
*/
-int
-main (int argc, char *const *argv)
+static void
+client_disconnect_cb (void *cls,
+ struct GNUNET_SERVICE_Client *c,
+ void *internal_cls)
{
- int ret;
- ret = GNUNET_SERVICE_run (argc, argv, "consensus", GNUNET_SERVICE_OPTION_NONE, &run, NULL);
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, "exit\n");
- return (GNUNET_OK == ret) ? 0 : 1;
+ struct ConsensusSession *session = internal_cls;
+
+ if (NULL != session->set_listener)
+ {
+ GNUNET_SET_listen_cancel (session->set_listener);
+ session->set_listener = NULL;
+ }
+ GNUNET_CONTAINER_DLL_remove (sessions_head,
+ sessions_tail,
+ session);
+ GNUNET_free (session);
}
+
+/**
+ * Define "main" method using service macro.
+ */
+GNUNET_SERVICE_MAIN
+("consensus",
+ GNUNET_SERVICE_OPTION_NONE,
+ &run,
+ &client_connect_cb,
+ &client_disconnect_cb,
+ NULL,
+ GNUNET_MQ_hd_fixed_size (client_conclude,
+ GNUNET_MESSAGE_TYPE_CONSENSUS_CLIENT_CONCLUDE,
+ struct GNUNET_MessageHeader,
+ NULL),
+ GNUNET_MQ_hd_var_size (client_insert,
+ GNUNET_MESSAGE_TYPE_CONSENSUS_CLIENT_INSERT,
+ struct GNUNET_CONSENSUS_ElementMessage,
+ NULL),
+ GNUNET_MQ_hd_var_size (client_join,
+ GNUNET_MESSAGE_TYPE_CONSENSUS_CLIENT_JOIN,
+ struct GNUNET_CONSENSUS_JoinMessage,
+ NULL),
+ GNUNET_MQ_handler_end ());
+
+/* end of gnunet-service-consensus.c */
projects / oweals / gnunet.git / blobdiff