/*
This file is part of GNUnet.
- (C) 2009 Christian Grothoff (and other contributing authors)
+ (C) 2013 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
*
* @author Christian Grothoff
* @author Nathan Evans
- *
- * TODO: The gossip rates need to be worked out. Probably many other things
- * as well.
- *
*/
#include "platform.h"
-#include "gnunet_client_lib.h"
-#include "gnunet_getopt_lib.h"
-#include "gnunet_os_lib.h"
+#include "gnunet_util_lib.h"
#include "gnunet_protocols.h"
-#include "gnunet_service_lib.h"
#include "gnunet_core_service.h"
-#include "gnunet_signal_lib.h"
-#include "gnunet_util_lib.h"
#include "gnunet_hello_lib.h"
#include "gnunet_peerinfo_service.h"
-#include "gnunet_crypto_lib.h"
+#include "gnunet_statistics_service.h"
+#include "gnunet_set_service.h"
+#include "gnunet_ats_service.h"
#include "dv.h"
+#include <gcrypt.h>
-/**
- * For testing mostly, remember only the
- * shortest path to a distant neighbor.
- */
-#define AT_MOST_ONE GNUNET_NO
-
-#define USE_PEER_ID GNUNET_YES
-
-/**
- * How many outstanding messages (unknown sender) will we allow per peer?
- */
-#define MAX_OUTSTANDING_MESSAGES 5
-
-/**
- * How often do we check about sending out more peer information (if
- * we are connected to no peers previously).
- */
-#define GNUNET_DV_DEFAULT_SEND_INTERVAL GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS, 500000)
-
-/**
- * How long do we wait at most between sending out information?
- */
-#define GNUNET_DV_MAX_SEND_INTERVAL GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS, 500000)
-
-/**
- * How long can we have not heard from a peer and
- * still have it in our tables?
- */
-#define GNUNET_DV_PEER_EXPIRATION_TIME GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 1000))
/**
- * Priority for gossip.
+ * How often do we establish the consensu?
*/
-#define GNUNET_DV_DHT_GOSSIP_PRIORITY (GNUNET_EXTREME_PRIORITY / 10)
+#define GNUNET_DV_CONSENSUS_FREQUENCY GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MINUTES, 5)
/**
- * How often should we check if expiration time has elapsed for
- * some peer?
+ * Maximum number of messages we queue per peer.
*/
-#define GNUNET_DV_MAINTAIN_FREQUENCY GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 5))
+#define MAX_QUEUE_SIZE 16
/**
- * How long to allow a message to be delayed?
+ * Maximum number of messages we queue towards the clients/plugin.
*/
-#define DV_DELAY GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 5))
+#define MAX_QUEUE_SIZE_PLUGIN 1024
/**
- * Priority to use for DV data messages.
+ * The default fisheye depth, from how many hops away will
+ * we keep peers?
*/
-#define DV_PRIORITY 0
+#define DEFAULT_FISHEYE_DEPTH 3
/**
- * The cost to a direct neighbor. We used to use 0, but 1 makes more sense.
+ * How many hops is a direct neighbor away?
*/
#define DIRECT_NEIGHBOR_COST 1
-/**
- * The default number of direct connections to store in DV (max)
- */
-#define DEFAULT_DIRECT_CONNECTIONS 50
-
-/**
- * The default size of direct + extended peers in DV (max)
- */
-#define DEFAULT_DV_SIZE 100
-/**
- * The default fisheye depth, from how many hops away will
- * we keep peers?
- */
-#define DEFAULT_FISHEYE_DEPTH 4
+GNUNET_NETWORK_STRUCT_BEGIN
/**
- * Linked list of messages to send to clients.
+ * Information about a peer DV can route to. These entries are what
+ * we use as the binary format to establish consensus to create our
+ * routing table and as the address format in the HELLOs.
*/
-struct PendingMessage
+struct Target
{
- /**
- * Pointer to next item in the list
- */
- struct PendingMessage *next;
-
- /**
- * Pointer to previous item in the list
- */
- struct PendingMessage *prev;
-
- /**
- * The PeerIdentity to send to
- */
- struct GNUNET_PeerIdentity recipient;
-
- /**
- * The result of message sending.
- */
- struct GNUNET_DV_SendResultMessage *send_result;
-
- /**
- * Message importance level.
- */
- unsigned int importance;
-
- /**
- * Size of message.
- */
- unsigned int msg_size;
/**
- * How long to wait before sending message.
+ * Identity of the peer we can reach.
*/
- struct GNUNET_TIME_Relative timeout;
+ struct GNUNET_PeerIdentity peer;
/**
- * Actual message to be sent; // avoid allocation
+ * How many hops (1-3) is this peer away? in network byte order
*/
- const struct GNUNET_MessageHeader *msg; // msg = (cast) &pm[1]; // memcpy (&pm[1], data, len);
+ uint32_t distance GNUNET_PACKED;
};
-struct FastGossipNeighborList
-{
- /**
- * Next element of DLL
- */
- struct FastGossipNeighborList *next;
-
- /**
- * Prev element of DLL
- */
- struct FastGossipNeighborList *prev;
-
- /**
- * The neighbor to gossip about
- */
- struct DistantNeighbor *about;
-};
/**
- * Context created whenever a direct peer connects to us,
- * used to gossip other peers to it.
+ * Message exchanged between DV services (via core), requesting a
+ * message to be routed.
*/
-struct NeighborSendContext
+struct RouteMessage
{
/**
- * The peer we will gossip to.
+ * Type: GNUNET_MESSAGE_TYPE_DV_ROUTE
*/
- struct DirectNeighbor *toNeighbor;
+ struct GNUNET_MessageHeader header;
/**
- * The task associated with this context.
+ * Expected (remaining) distance. Must be always smaller than
+ * DEFAULT_FISHEYE_DEPTH, should be zero at the target. Must
+ * be decremented by one at each hop. Peers must not forward
+ * these messages further once the counter has reached zero.
*/
- GNUNET_SCHEDULER_TaskIdentifier task;
+ uint32_t distance GNUNET_PACKED;
/**
- * Head of DLL of peers to gossip about
- * as fast as possible to this peer, for initial
- * set up.
+ * The (actual) target of the message (this peer, if distance is zero).
*/
- struct FastGossipNeighborList *fast_gossip_list_head;
+ struct GNUNET_PeerIdentity target;
/**
- * Tail of DLL of peers to gossip about
- * as fast as possible to this peer, for initial
- * set up.
+ * The (actual) sender of the message.
*/
- struct FastGossipNeighborList *fast_gossip_list_tail;
+ struct GNUNET_PeerIdentity sender;
};
+GNUNET_NETWORK_STRUCT_END
+
/**
- * Struct to hold information for updating existing neighbors
+ * Linked list of messages to send to clients.
*/
-struct NeighborUpdateInfo
+struct PendingMessage
{
/**
- * Cost
+ * Pointer to next item in the list
*/
- unsigned int cost;
+ struct PendingMessage *next;
/**
- * The existing neighbor
+ * Pointer to previous item in the list
*/
- struct DistantNeighbor *neighbor;
+ struct PendingMessage *prev;
/**
- * The referrer of the possibly existing peer
+ * Actual message to be sent, allocated after this struct.
*/
- struct DirectNeighbor *referrer;
+ const struct GNUNET_MessageHeader *msg;
/**
- * The time we heard about this peer
+ * Ultimate target for the message.
*/
- struct GNUNET_TIME_Absolute now;
+ struct GNUNET_PeerIdentity ultimate_target;
/**
- * Peer id this peer uses to refer to neighbor.
+ * Unique ID of the message.
*/
- unsigned int referrer_peer_id;
+ uint32_t uid;
};
-/**
- * Struct to store a single message received with
- * an unknown sender.
- */
-struct UnknownSenderMessage
-{
- /**
- * Message sender (immediate)
- */
- struct GNUNET_PeerIdentity sender;
-
- /**
- * The actual message received
- */
- struct GNUNET_MessageHeader *message;
-
- /**
- * Latency of connection
- */
- struct GNUNET_TIME_Relative latency;
-
- /**
- * Distance to destination
- */
- uint32_t distance;
-
- /**
- * Unknown sender id
- */
- uint32_t sender_id;
-};
/**
- * Struct where actual neighbor information is stored,
- * referenced by min_heap and max_heap. Freeing dealt
- * with when items removed from hashmap.
+ * Information about a direct neighbor (core-level, excluding
+ * DV-links, only DV-enabled peers).
*/
struct DirectNeighbor
{
- /**
- * Identity of neighbor.
- */
- struct GNUNET_PeerIdentity identity;
-
- /**
- * PublicKey of neighbor.
- */
- struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pkey;
-
- /**
- * Head of DLL of nodes that this direct neighbor referred to us.
- */
- struct DistantNeighbor *referee_head;
/**
- * Tail of DLL of nodes that this direct neighbor referred to us.
+ * Identity of the peer.
*/
- struct DistantNeighbor *referee_tail;
+ struct GNUNET_PeerIdentity peer;
/**
- * The sending context for gossiping peers to this neighbor.
+ * Session ID we use whenever we create a set union with
+ * this neighbor; constructed from the XOR of our peer
+ * IDs and then salted with "DV-SALT" to avoid conflicts
+ * with other applications.
*/
- struct NeighborSendContext *send_context;
+ struct GNUNET_HashCode real_session_id;
/**
- * Is this one of the direct neighbors that we are "hiding"
- * from DV?
+ * Head of linked list of messages to send to this peer.
*/
- int hidden;
+ struct PendingMessage *pm_head;
/**
- * Save messages immediately from this direct neighbor from a
- * distan peer we don't know on the chance that it will be
- * gossiped about and we can deliver the message.
+ * Tail of linked list of messages to send to this peer.
*/
- struct UnknownSenderMessage pending_messages[MAX_OUTSTANDING_MESSAGES];
-};
-
+ struct PendingMessage *pm_tail;
-/**
- * Struct where actual neighbor information is stored,
- * referenced by min_heap and max_heap. Freeing dealt
- * with when items removed from hashmap.
- */
-struct DistantNeighbor
-{
/**
- * We keep distant neighbor's of the same referrer in a DLL.
+ * Transmit handle to core service.
*/
- struct DistantNeighbor *next;
+ struct GNUNET_CORE_TransmitHandle *cth;
/**
- * We keep distant neighbor's of the same referrer in a DLL.
+ * Routing table of the neighbor, NULL if not yet established.
+ * Keys are peer identities, values are 'struct Target' entries.
+ * Note that the distances in the targets are from the point-of-view
+ * of the peer, not from us!
*/
- struct DistantNeighbor *prev;
+ struct GNUNET_CONTAINER_MultiPeerMap *neighbor_table;
/**
- * Node in min heap
+ * Updated routing table of the neighbor, under construction,
+ * NULL if we are not currently building it.
+ * Keys are peer identities, values are 'struct Target' entries.
+ * Note that the distances in the targets are from the point-of-view
+ * of the peer, not from us!
*/
- struct GNUNET_CONTAINER_HeapNode *min_loc;
+ struct GNUNET_CONTAINER_MultiPeerMap *neighbor_table_consensus;
/**
- * Node in max heap
+ * Our current (exposed) routing table as a set.
*/
- struct GNUNET_CONTAINER_HeapNode *max_loc;
+ struct GNUNET_SET_Handle *my_set;
/**
- * Identity of referrer (next hop towards 'neighbor').
+ * Handle for our current active set union operation.
*/
- struct DirectNeighbor *referrer;
+ struct GNUNET_SET_OperationHandle *set_op;
/**
- * Identity of neighbor.
+ * Handle used if we are listening for this peer, waiting for the
+ * other peer to initiate construction of the set union. NULL if
+ * we ar the initiating peer.
*/
- struct GNUNET_PeerIdentity identity;
+ struct GNUNET_SET_ListenHandle *listen_handle;
/**
- * PublicKey of neighbor.
+ * ID of the task we use to (periodically) update our consensus
+ * with this peer. Used if we are the initiating peer.
*/
- struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pkey;
+ GNUNET_SCHEDULER_TaskIdentifier initiate_task;
/**
- * Last time we received routing information from this peer
+ * At what offset are we, with respect to inserting our own routes
+ * into the consensus?
*/
- struct GNUNET_TIME_Absolute last_activity;
+ unsigned int consensus_insertion_offset;
/**
- * Last time we sent routing information about this peer
+ * At what distance are we, with respect to inserting our own routes
+ * into the consensus?
*/
- struct GNUNET_TIME_Absolute last_gossip;
+ unsigned int consensus_insertion_distance;
/**
- * Cost to neighbor, used for actual distance vector computations
+ * Number of messages currently in the 'pm_XXXX'-DLL.
*/
- unsigned int cost;
+ unsigned int pm_queue_size;
/**
- * Random identifier *we* use for this peer, to be used as shortcut
- * instead of sending full peer id for each message
+ * Flag set within 'check_target_removed' to trigger full global route refresh.
*/
- unsigned int our_id;
+ int target_removed;
/**
- * Random identifier the *referrer* uses for this peer.
+ * Our distance to this peer, 0 for unknown.
*/
- unsigned int referrer_id;
+ uint32_t distance;
/**
- * Is this one of the direct neighbors that we are "hiding"
- * from DV?
+ * Is this neighbor connected at the core level?
*/
- int hidden;
+ int connected;
};
-struct PeerIteratorContext
-{
- /**
- * The actual context, to be freed later.
- */
- struct GNUNET_PEERINFO_IteratorContext *ic;
-
- /**
- * The neighbor about which we are concerned.
- */
- struct DirectNeighbor *neighbor;
-
- /**
- * The distant neighbor entry for this direct neighbor.
- */
- struct DistantNeighbor *distant;
-
-};
/**
- * Context used for creating hello messages when
- * gossips are received.
+ * A route includes information about the next hop,
+ * the target, and the ultimate distance to the
+ * target.
*/
-struct HelloContext
-{
- /**
- * Identity of distant neighbor.
- */
- struct GNUNET_PeerIdentity distant_peer;
-
- /**
- * Identity of direct neighbor, via which we send this message.
- */
- const struct GNUNET_PeerIdentity *direct_peer;
-
- /**
- * How many addresses do we need to add (always starts at 1, then set to 0)
- */
- int addresses_to_add;
-
-};
-
-struct DV_SendContext
+struct Route
{
- /**
- * The distant peer (should always match)
- */
- struct GNUNET_PeerIdentity *distant_peer;
-
- /**
- * The direct peer, we need to verify the referrer of.
- */
- struct GNUNET_PeerIdentity *direct_peer;
-
- /**
- * The message to be sent
- */
- struct GNUNET_MessageHeader *message;
-
- /**
- * The pre-built send result message. Simply needs to be queued
- * and freed once send has been called!
- */
- struct GNUNET_DV_SendResultMessage *send_result;
/**
- * The size of the message being sent, may be larger
- * than message->header.size because it's multiple
- * messages packed into one!
+ * Which peer do we need to forward the message to?
*/
- size_t message_size;
+ struct DirectNeighbor *next_hop;
/**
- * How important is this message?
+ * What would be the target, and how far is it away?
*/
- unsigned int importance;
+ struct Target target;
/**
- * Timeout for this message
+ * Offset of this target in the respective consensus set.
*/
- struct GNUNET_TIME_Relative timeout;
+ unsigned int set_offset;
- /**
- * Unique ID for DV message
- */
- unsigned int uid;
};
-struct FindDestinationContext
-{
- unsigned int tid;
- struct DistantNeighbor *dest;
-};
-struct FindIDContext
+/**
+ * Set of targets we bring to a consensus; all targets in a set have a
+ * distance equal to the sets distance (which is implied by the array
+ * index of the set).
+ */
+struct ConsensusSet
{
- unsigned int tid;
- struct GNUNET_PeerIdentity *dest;
- const struct GNUNET_PeerIdentity *via;
-};
-struct DisconnectContext
-{
/**
- * Distant neighbor to get pid from.
+ * Array of targets in the set, may include NULL entries if a
+ * neighbor has disconnected; the targets are allocated with the
+ * respective container (all_routes), not here.
*/
- struct DistantNeighbor *distant;
+ struct Route **targets;
/**
- * Direct neighbor that disconnected.
+ * Size of the 'targets' array.
*/
- struct DirectNeighbor *direct;
-};
+ unsigned int array_length;
-struct TokenizedMessageContext
-{
- /**
- * Immediate sender of this message
- */
- const struct GNUNET_PeerIdentity *peer;
+};
- /**
- * Distant sender of the message
- */
- struct DistantNeighbor *distant;
- /**
- * Uid for this set of messages
- */
- uint32_t uid;
-};
+/**
+ * Peermap of all of our neighbors; processing these usually requires
+ * first checking to see if the peer is core-connected and if the
+ * distance is 1, in which case they are direct neighbors.
+ */
+static struct GNUNET_CONTAINER_MultiPeerMap *direct_neighbors;
/**
- * Context for finding the least cost peer to send to.
- * Transport selection can only go so far.
+ * Hashmap with all routes that we currently support; contains
+ * routing information for all peers from distance 2
+ * up to distance DEFAULT_FISHEYE_DEPTH.
*/
-struct FindLeastCostContext
-{
- struct DistantNeighbor *target;
- unsigned int least_cost;
-};
+static struct GNUNET_CONTAINER_MultiPeerMap *all_routes;
/**
- * Handle to the core service api.
+ * Array of consensus sets we expose to the outside world. Sets
+ * are structured by the distance to the target.
*/
-static struct GNUNET_CORE_Handle *coreAPI;
+static struct ConsensusSet consensi[DEFAULT_FISHEYE_DEPTH - 1];
/**
- * Stream tokenizer to handle messages coming in from core.
+ * Handle to the core service api.
*/
-static struct GNUNET_SERVER_MessageStreamTokenizer *coreMST;
+static struct GNUNET_CORE_Handle *core_api;
/**
* The identity of our peer.
static const struct GNUNET_CONFIGURATION_Handle *cfg;
/**
- * The scheduler for this service.
+ * The client, the DV plugin connected to us (or an event monitor).
+ * Hopefully this client will never change, although if the plugin
+ * dies and returns for some reason it may happen.
*/
-static struct GNUNET_SCHEDULER_Handle *sched;
+static struct GNUNET_SERVER_NotificationContext *nc;
/**
- * The client, the DV plugin connected to us. Hopefully
- * this client will never change, although if the plugin dies
- * and returns for some reason it may happen.
+ * Handle for the statistics service.
*/
-static struct GNUNET_SERVER_Client * client_handle;
+static struct GNUNET_STATISTICS_Handle *stats;
/**
- * Task to run when we shut down, cleaning up all our trash
+ * Handle to ATS service.
*/
-static GNUNET_SCHEDULER_TaskIdentifier cleanup_task;
-
-static size_t default_dv_priority = 0;
-
-static char *my_short_id;
+static struct GNUNET_ATS_PerformanceHandle *ats;
-/**
- * Transmit handle to the plugin.
- */
-static struct GNUNET_CONNECTION_TransmitHandle * plugin_transmit_handle;
/**
- * Head of DLL for client messages
+ * Start creating a new DV set union by initiating the connection.
+ *
+ * @param cls the 'struct DirectNeighbor' of the peer we're building
+ * a routing consensus with
+ * @param tc scheduler context
*/
-static struct PendingMessage *plugin_pending_head;
+static void
+initiate_set_union (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc);
-/**
- * Tail of DLL for client messages
- */
-static struct PendingMessage *plugin_pending_tail;
/**
- * Handle to the peerinfo service
+ * Start creating a new DV set union construction, our neighbour has
+ * asked for it (callback for listening peer).
+ *
+ * @param cls the 'struct DirectNeighbor' of the peer we're building
+ * a routing consensus with
+ * @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 struct GNUNET_PEERINFO_Handle *peerinfo_handle;
+static void
+listen_set_union (void *cls,
+ const struct GNUNET_PeerIdentity *other_peer,
+ const struct GNUNET_MessageHeader *context_msg,
+ struct GNUNET_SET_Request *request);
-/**
- * Transmit handle to core service.
- */
-static struct GNUNET_CORE_TransmitHandle * core_transmit_handle;
/**
- * Head of DLL for core messages
+ * Forward a message from another peer to the plugin.
+ *
+ * @param message the message to send to the plugin
+ * @param origin the original sender of the message
+ * @param distance distance to the original sender of the message
*/
-static struct PendingMessage *core_pending_head;
+static void
+send_data_to_plugin (const struct GNUNET_MessageHeader *message,
+ const struct GNUNET_PeerIdentity *origin,
+ uint32_t distance)
+{
+ struct GNUNET_DV_ReceivedMessage *received_msg;
+ size_t size;
-/**
- * Tail of DLL for core messages
- */
-static struct PendingMessage *core_pending_tail;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Delivering message from peer `%s'\n",
+ GNUNET_i2s (origin));
+ size = sizeof (struct GNUNET_DV_ReceivedMessage) +
+ ntohs (message->size);
+ if (size >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
+ {
+ GNUNET_break (0); /* too big */
+ return;
+ }
+ received_msg = GNUNET_malloc (size);
+ received_msg->header.size = htons (size);
+ received_msg->header.type = htons (GNUNET_MESSAGE_TYPE_DV_RECV);
+ received_msg->distance = htonl (distance);
+ received_msg->sender = *origin;
+ memcpy (&received_msg[1], message, ntohs (message->size));
+ GNUNET_SERVER_notification_context_broadcast (nc,
+ &received_msg->header,
+ GNUNET_YES);
+ GNUNET_free (received_msg);
+}
-/**
- * Map of PeerIdentifiers to 'struct GNUNET_dv_neighbor*'s for all
- * directly connected peers.
- */
-static struct GNUNET_CONTAINER_MultiHashMap *direct_neighbors;
/**
- * Map of PeerIdentifiers to 'struct GNUNET_dv_neighbor*'s for
- * peers connected via DV (extended neighborhood). Does ALSO
- * include any peers that are in 'direct_neighbors'; for those
- * peers, the cost will be zero and the referrer all zeros.
+ * Forward a control message to the plugin.
+ *
+ * @param message the message to send to the plugin
*/
-static struct GNUNET_CONTAINER_MultiHashMap *extended_neighbors;
+static void
+send_control_to_plugin (const struct GNUNET_MessageHeader *message)
+{
+ GNUNET_SERVER_notification_context_broadcast (nc,
+ message,
+ GNUNET_NO);
+}
-/**
- * We use the min heap (min refers to cost) to prefer
- * gossipping about peers with small costs.
- */
-static struct GNUNET_CONTAINER_Heap *neighbor_min_heap;
/**
- * We use the max heap (max refers to cost) for general
- * iterations over all peers and to remove the most costly
- * connection if we have too many.
+ * Give an (N)ACK message to the plugin, we transmitted a message for it.
+ *
+ * @param target peer that received the message
+ * @param uid plugin-chosen UID for the message
+ * @param nack GNUNET_NO to send ACK, GNUNET_YES to send NACK
*/
-static struct GNUNET_CONTAINER_Heap *neighbor_max_heap;
+static void
+send_ack_to_plugin (const struct GNUNET_PeerIdentity *target,
+ uint32_t uid,
+ int nack)
+{
+ struct GNUNET_DV_AckMessage ack_msg;
-/**
- * How far out to keep peers we learn about.
- */
-static unsigned long long fisheye_depth;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Delivering ACK for message to peer `%s'\n",
+ GNUNET_i2s (target));
+ ack_msg.header.size = htons (sizeof (ack_msg));
+ ack_msg.header.type = htons ((GNUNET_YES == nack)
+ ? GNUNET_MESSAGE_TYPE_DV_SEND_NACK
+ : GNUNET_MESSAGE_TYPE_DV_SEND_ACK);
+ ack_msg.uid = htonl (uid);
+ ack_msg.target = *target;
+ send_control_to_plugin (&ack_msg.header);
+}
-/**
- * How many peers to store at most.
- */
-static unsigned long long max_table_size;
/**
- * We've been given a target ID based on the random numbers that
- * we assigned to our DV-neighborhood. Find the entry for the
- * respective neighbor.
+ * Send a DISTANCE_CHANGED message to the plugin.
+ *
+ * @param peer peer with a changed distance
+ * @param distance new distance to the peer
*/
-static int
-find_destination (void *cls,
- struct GNUNET_CONTAINER_HeapNode *node,
- void *element, GNUNET_CONTAINER_HeapCostType cost)
+static void
+send_distance_change_to_plugin (const struct GNUNET_PeerIdentity *peer,
+ uint32_t distance)
{
- struct FindDestinationContext *fdc = cls;
- struct DistantNeighbor *dn = element;
+ struct GNUNET_DV_DistanceUpdateMessage du_msg;
- if (fdc->tid != dn->our_id)
- return GNUNET_YES;
- fdc->dest = dn;
- return GNUNET_NO;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Delivering DISTANCE_CHANGED for message about peer `%s'\n",
+ GNUNET_i2s (peer));
+ du_msg.header.size = htons (sizeof (du_msg));
+ du_msg.header.type = htons (GNUNET_MESSAGE_TYPE_DV_DISTANCE_CHANGED);
+ du_msg.distance = htonl (distance);
+ du_msg.peer = *peer;
+ send_control_to_plugin (&du_msg.header);
}
/**
- * We've been given a target ID based on the random numbers that
- * we assigned to our DV-neighborhood. Find the entry for the
- * respective neighbor.
+ * Give a CONNECT message to the plugin.
+ *
+ * @param target peer that connected
+ * @param distance distance to the target
*/
-static int
-find_specific_id (void *cls,
- const GNUNET_HashCode *key,
- void *value)
+static void
+send_connect_to_plugin (const struct GNUNET_PeerIdentity *target,
+ uint32_t distance)
{
- struct FindIDContext *fdc = cls;
- struct DistantNeighbor *dn = value;
+ struct GNUNET_DV_ConnectMessage cm;
- if (memcmp(&dn->referrer->identity, fdc->via, sizeof(struct GNUNET_PeerIdentity)) == 0)
- {
- fdc->tid = dn->referrer_id;
- return GNUNET_NO;
- }
- return GNUNET_YES;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Delivering CONNECT about peer `%s'\n",
+ GNUNET_i2s (target));
+ cm.header.size = htons (sizeof (cm));
+ cm.header.type = htons (GNUNET_MESSAGE_TYPE_DV_CONNECT);
+ cm.distance = htonl (distance);
+ cm.peer = *target;
+ send_control_to_plugin (&cm.header);
}
+
/**
- * Find a distant peer whose referrer_id matches what we're
- * looking for. For looking up a peer we've gossipped about
- * but is now disconnected. Need to do this because we don't
- * want to remove those that may be accessible via a different
- * route.
+ * Give a DISCONNECT message to the plugin.
+ *
+ * @param target peer that disconnected
*/
-static int find_distant_peer (void *cls,
- const GNUNET_HashCode * key,
- void *value)
+static void
+send_disconnect_to_plugin (const struct GNUNET_PeerIdentity *target)
{
- struct FindDestinationContext *fdc = cls;
- struct DistantNeighbor *distant = value;
+ struct GNUNET_DV_DisconnectMessage dm;
- if (fdc->tid == distant->referrer_id)
- {
- fdc->dest = distant;
- return GNUNET_NO;
- }
- return GNUNET_YES;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Delivering DISCONNECT about peer `%s'\n",
+ GNUNET_i2s (target));
+ dm.header.size = htons (sizeof (dm));
+ dm.header.type = htons (GNUNET_MESSAGE_TYPE_DV_DISCONNECT);
+ dm.reserved = htonl (0);
+ dm.peer = *target;
+ send_control_to_plugin (&dm.header);
}
+
/**
- * Function called to notify a client about the socket
- * begin ready to queue more data. "buf" will be
- * NULL and "size" zero if the socket was closed for
- * writing in the meantime.
+ * Function called to transfer a message to another peer
+ * via core.
*
- * @param cls closure
+ * @param cls closure with the direct neighbor
* @param size number of bytes available in buf
* @param buf where the callee should write the message
* @return number of bytes written to buf
*/
-size_t transmit_to_plugin (void *cls,
- size_t size, void *buf)
+static size_t
+core_transmit_notify (void *cls, size_t size, void *buf)
{
+ struct DirectNeighbor *dn = cls;
char *cbuf = buf;
- struct PendingMessage *reply;
+ struct PendingMessage *pending;
size_t off;
size_t msize;
- if (buf == NULL)
- {
- /* client disconnected */
-#if DEBUG_DV_MESSAGES
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s: %s buffer was NULL (client disconnect?)\n", my_short_id, "transmit_to_plugin");
-#endif
- return 0;
- }
- plugin_transmit_handle = NULL;
+ dn->cth = NULL;
+ if (NULL == buf)
+ {
+ /* peer disconnected */
+ return 0;
+ }
off = 0;
- while ( (NULL != (reply = plugin_pending_head)) &&
- (size >= off + (msize = ntohs (reply->msg->size))))
- {
- GNUNET_CONTAINER_DLL_remove (plugin_pending_head,
- plugin_pending_tail,
- reply);
- memcpy (&cbuf[off], reply->msg, msize);
- GNUNET_free (reply);
- off += msize;
- }
-
- if (plugin_pending_head != NULL)
- plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle,
- ntohs(plugin_pending_head->msg->size),
- GNUNET_TIME_UNIT_FOREVER_REL,
- &transmit_to_plugin, NULL);
-
+ pending = dn->pm_head;
+ off = 0;
+ while ( (NULL != (pending = dn->pm_head)) &&
+ (size >= off + (msize = ntohs (pending->msg->size))))
+ {
+ dn->pm_queue_size--;
+ GNUNET_CONTAINER_DLL_remove (dn->pm_head,
+ dn->pm_tail,
+ pending);
+ memcpy (&cbuf[off], pending->msg, msize);
+ if (0 != pending->uid)
+ send_ack_to_plugin (&pending->ultimate_target,
+ pending->uid,
+ GNUNET_NO);
+ GNUNET_free (pending);
+ off += msize;
+ }
+ if (NULL != dn->pm_head)
+ dn->cth =
+ GNUNET_CORE_notify_transmit_ready (core_api,
+ GNUNET_YES /* cork */,
+ 0 /* priority */,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ &dn->peer,
+ msize,
+ &core_transmit_notify, dn);
return off;
}
+
/**
- * Send a message to the dv plugin.
+ * Forward the given payload to the given target.
*
- * @param sender the direct sender of the message
- * @param message the message to send to the plugin
- * (may be an encapsulated type)
- * @param message_size the size of the message to be sent
- * @param distant_neighbor the original sender of the message
- * @param cost the cost to the original sender of the message
+ * @param target where to send the message
+ * @param uid unique ID for the message
+ * @param ultimate_target ultimate recipient for the message
+ * @param distance expected (remaining) distance to the target
+ * @param sender original sender of the message
+ * @param payload payload of the message
*/
-void send_to_plugin(const struct GNUNET_PeerIdentity * sender,
- const struct GNUNET_MessageHeader *message,
- size_t message_size,
- struct GNUNET_PeerIdentity *distant_neighbor,
- size_t cost)
+static void
+forward_payload (struct DirectNeighbor *target,
+ uint32_t distance,
+ uint32_t uid,
+ const struct GNUNET_PeerIdentity *sender,
+ const struct GNUNET_PeerIdentity *ultimate_target,
+ const struct GNUNET_MessageHeader *payload)
{
- struct GNUNET_DV_MessageReceived *received_msg;
- struct PendingMessage *pending_message;
- char *sender_address;
- size_t sender_address_len;
- char *packed_msg_start;
- int size;
-
-#if DEBUG_DV
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_to_plugin called with peer %s as sender\n", GNUNET_i2s(distant_neighbor));
-#endif
-
- if (memcmp(sender, distant_neighbor, sizeof(struct GNUNET_PeerIdentity)) != 0)
+ struct PendingMessage *pm;
+ struct RouteMessage *rm;
+ size_t msize;
+
+ if ( (target->pm_queue_size >= MAX_QUEUE_SIZE) &&
+ (0 != memcmp (sender,
+ &my_identity,
+ sizeof (struct GNUNET_PeerIdentity))) )
{
- sender_address_len = sizeof(struct GNUNET_PeerIdentity) * 2;
- sender_address = GNUNET_malloc(sender_address_len);
- memcpy(sender_address, distant_neighbor, sizeof(struct GNUNET_PeerIdentity));
- memcpy(&sender_address[sizeof(struct GNUNET_PeerIdentity)], sender, sizeof(struct GNUNET_PeerIdentity));
+ GNUNET_break (0 == uid);
+ return;
}
- else
+ msize = sizeof (struct RouteMessage) + ntohs (payload->size);
+ if (msize >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
{
- sender_address_len = sizeof(struct GNUNET_PeerIdentity);
- sender_address = GNUNET_malloc(sender_address_len);
- memcpy(sender_address, sender, sizeof(struct GNUNET_PeerIdentity));
+ GNUNET_break (0);
+ return;
}
+ pm = GNUNET_malloc (sizeof (struct PendingMessage) + msize);
+ pm->ultimate_target = *ultimate_target;
+ pm->uid = uid;
+ pm->msg = (const struct GNUNET_MessageHeader *) &pm[1];
+ rm = (struct RouteMessage *) &pm[1];
+ rm->header.size = htons ((uint16_t) msize);
+ rm->header.type = htons (GNUNET_MESSAGE_TYPE_DV_ROUTE);
+ rm->distance = htonl (distance);
+ rm->target = target->peer;
+ rm->sender = *sender;
+ memcpy (&rm[1], payload, ntohs (payload->size));
+ GNUNET_CONTAINER_DLL_insert_tail (target->pm_head,
+ target->pm_tail,
+ pm);
+ target->pm_queue_size++;
+ if (NULL == target->cth)
+ target->cth = GNUNET_CORE_notify_transmit_ready (core_api,
+ GNUNET_YES /* cork */,
+ 0 /* priority */,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ &target->peer,
+ msize,
+ &core_transmit_notify, target);
+}
- size = sizeof(struct GNUNET_DV_MessageReceived) + sender_address_len + message_size;
- received_msg = GNUNET_malloc(size);
- received_msg->header.size = htons(size);
- received_msg->header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_DV_RECEIVE);
- received_msg->distance = htonl(cost);
- received_msg->msg_len = htonl(message_size);
- /* Set the sender in this message to be the original sender! */
- memcpy(&received_msg->sender, distant_neighbor, sizeof(struct GNUNET_PeerIdentity));
- /* Copy the intermediate sender to the end of the message, this is how the transport identifies this peer */
- memcpy(&received_msg[1], sender_address, sender_address_len);
- GNUNET_free(sender_address);
- /* Copy the actual message after the sender */
- packed_msg_start = (char *)&received_msg[1];
- packed_msg_start = &packed_msg_start[sender_address_len];
- memcpy(packed_msg_start, message, message_size);
- pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + size);
- pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
- memcpy(&pending_message[1], received_msg, size);
- GNUNET_free(received_msg);
-
- GNUNET_CONTAINER_DLL_insert_after(plugin_pending_head, plugin_pending_tail, plugin_pending_tail, pending_message);
-
- if (client_handle != NULL)
- {
- if (plugin_transmit_handle == NULL)
- {
- plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle,
- size, GNUNET_TIME_UNIT_FOREVER_REL,
- &transmit_to_plugin, NULL);
- }
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Failed to queue message for plugin, client_handle not yet set (how?)!\n");
- }
-}
-
-/* Declare here so retry_core_send is aware of it */
-size_t core_transmit_notify (void *cls,
- size_t size, void *buf);
/**
- * Try to send another message from our core sending list
- */
-static void
-try_core_send (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct PendingMessage *pending;
- pending = core_pending_head;
-
- if (core_transmit_handle != NULL)
- return; /* Message send already in progress */
-
- if (pending != NULL)
- core_transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, pending->importance, pending->timeout, &pending->recipient, pending->msg_size, &core_transmit_notify, NULL);
-}
-
-/**
- * Function called to notify a client about the socket
- * being ready to queue more data. "buf" will be
- * NULL and "size" zero if the socket was closed for
- * writing in the meantime.
+ * Find a free slot for storing a 'route' in the 'consensi'
+ * set at the given distance.
*
- * @param cls closure (NULL)
- * @param size number of bytes available in buf
- * @param buf where the callee should write the message
- * @return number of bytes written to buf
+ * @param distance distance to use for the set slot
*/
-size_t core_transmit_notify (void *cls,
- size_t size, void *buf)
+static unsigned int
+get_consensus_slot (uint32_t distance)
{
- char *cbuf = buf;
- struct PendingMessage *pending;
- struct PendingMessage *client_reply;
- size_t off;
- size_t msize;
-
- if (buf == NULL)
- {
- /* client disconnected */
-#if DEBUG_DV
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "`%s': buffer was NULL\n", "DHT");
-#endif
- return 0;
- }
-
- core_transmit_handle = NULL;
- off = 0;
- pending = core_pending_head;
- if ( (pending != NULL) &&
- (size >= (msize = ntohs (pending->msg->size))))
- {
-#if DEBUG_DV
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "`%s' : transmit_notify (core) called with size %d\n", "dv service", msize);
-#endif
- GNUNET_CONTAINER_DLL_remove (core_pending_head,
- core_pending_tail,
- pending);
- if (pending->send_result != NULL) /* Will only be non-null if a real client asked for this send */
- {
- client_reply = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(struct GNUNET_DV_SendResultMessage));
- client_reply->msg = (struct GNUNET_MessageHeader *)&client_reply[1];
- memcpy(&client_reply[1], pending->send_result, sizeof(struct GNUNET_DV_SendResultMessage));
- GNUNET_free(pending->send_result);
-
- GNUNET_CONTAINER_DLL_insert_after(plugin_pending_head, plugin_pending_tail, plugin_pending_tail, client_reply);
- if (client_handle != NULL)
- {
- if (plugin_transmit_handle == NULL)
- {
- plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle,
- sizeof(struct GNUNET_DV_SendResultMessage),
- GNUNET_TIME_UNIT_FOREVER_REL,
- &transmit_to_plugin, NULL);
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Failed to queue message for plugin, must be one in progress already!!\n");
- }
- }
- }
- memcpy (&cbuf[off], pending->msg, msize);
- GNUNET_free (pending);
- off += msize;
- }
- /*reply = core_pending_head;*/
-
- GNUNET_SCHEDULER_add_now(sched, &try_core_send, NULL);
- /*if (reply != NULL)
- core_transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, reply->importance, reply->timeout, &reply->recipient, reply->msg_size, &core_transmit_notify, NULL);*/
-
- return off;
+ struct ConsensusSet *cs;
+ unsigned int i;
+
+ cs = &consensi[distance];
+ i = 0;
+ while ( (i < cs->array_length) &&
+ (NULL != cs->targets[i]) ) i++;
+ if (i == cs->array_length)
+ GNUNET_array_grow (cs->targets,
+ cs->array_length,
+ cs->array_length * 2 + 2);
+ return i;
}
/**
- * Send a DV data message via DV.
+ * Allocate a slot in the consensus set for a route.
*
- * @param sender the original sender of the message
- * @param recipient the next hop recipient, may be our direct peer, maybe not
- * @param send_context the send context
+ * @param route route to initialize
+ * @param distance which consensus set to use
*/
-static int
-send_message_via (const struct GNUNET_PeerIdentity *sender,
- const struct GNUNET_PeerIdentity *recipient,
- struct DV_SendContext *send_context)
+static void
+allocate_route (struct Route *route,
+ uint32_t distance)
{
- p2p_dv_MESSAGE_Data *toSend;
- unsigned int msg_size;
- unsigned int recipient_id;
- unsigned int sender_id;
- struct DistantNeighbor *source;
- struct PendingMessage *pending_message;
- struct FindIDContext find_context;
-#if DEBUG_DV
- char shortname[5];
-#endif
-
- msg_size = send_context->message_size + sizeof (p2p_dv_MESSAGE_Data);
-
- find_context.dest = send_context->distant_peer;
- find_context.via = recipient;
- find_context.tid = 0;
- GNUNET_CONTAINER_multihashmap_get_multiple (extended_neighbors, &send_context->distant_peer->hashPubKey,
- &find_specific_id, &find_context);
-
- if (find_context.tid == 0)
- {
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: find_specific_id failed to find peer!\n", my_short_id);
- /* target unknown to us, drop! */
- return GNUNET_SYSERR;
- }
- recipient_id = find_context.tid;
-
- if (0 == (memcmp (&my_identity,
- sender, sizeof (struct GNUNET_PeerIdentity))))
- {
- sender_id = 0;
- source = GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
- &sender->hashPubKey);
- if (source != NULL)
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: send_message_via found %s, myself in extended peer list???\n", my_short_id, GNUNET_i2s(&source->identity));
- }
- else
- {
- source = GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
- &sender->hashPubKey);
- if (source == NULL)
- {
- /* sender unknown to us, drop! */
- return GNUNET_SYSERR;
- }
- sender_id = source->our_id;
- }
+ unsigned int i;
- pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + msg_size);
- pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
- pending_message->send_result = send_context->send_result;
- memcpy(&pending_message->recipient, recipient, sizeof(struct GNUNET_PeerIdentity));
- pending_message->msg_size = msg_size;
- pending_message->importance = send_context->importance;
- pending_message->timeout = send_context->timeout;
- toSend = (p2p_dv_MESSAGE_Data *)pending_message->msg;
- toSend->header.size = htons (msg_size);
- toSend->header.type = htons (GNUNET_MESSAGE_TYPE_DV_DATA);
- toSend->sender = htonl (sender_id);
- toSend->recipient = htonl (recipient_id);
-#if DEBUG_DV_MESSAGES
- toSend->uid = send_context->uid; /* Still sent around in network byte order */
-#else
- toSend->uid = htonl(0);
-#endif
-
- memcpy (&toSend[1], send_context->message, send_context->message_size);
-
-#if DEBUG_DV
- memcpy(&shortname, GNUNET_i2s(send_context->distant_peer), 4);
- shortname[4] = '\0';
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Notifying core of send to destination `%s' via `%s' size %u\n", "DV", &shortname, GNUNET_i2s(recipient), msg_size);
-#endif
-
- GNUNET_CONTAINER_DLL_insert_after (core_pending_head,
- core_pending_tail,
- core_pending_tail,
- pending_message);
-
- GNUNET_SCHEDULER_add_now(sched, try_core_send, NULL);
-
- return GNUNET_YES;
+ i = get_consensus_slot (distance);
+ route->set_offset = i;
+ consensi[distance].targets[i] = route;
+ route->target.distance = htonl (distance);
}
+
/**
- * Given a FindLeastCostContext, and a set
- * of peers that match the target, return the cheapest.
+ * Release a slot in the consensus set for a route.
*
- * @param cls closure, a struct FindLeastCostContext
- * @param key the key identifying the target peer
- * @param value the target peer
- *
- * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
+ * @param route route to release the slot from
*/
-static int
-find_least_cost_peer (void *cls,
- const GNUNET_HashCode *key,
- void *value)
+static void
+release_route (struct Route *route)
{
- struct FindLeastCostContext *find_context = cls;
- struct DistantNeighbor *dn = value;
-
- if (dn->cost < find_context->least_cost)
- {
- find_context->target = dn;
- }
- if (dn->cost == DIRECT_NEIGHBOR_COST)
- return GNUNET_NO;
- return GNUNET_YES;
+ consensi[ntohl (route->target.distance)].targets[route->set_offset] = NULL;
+ route->set_offset = UINT_MAX; /* indicate invalid slot */
}
+
/**
- * Send a DV data message via DV.
+ * Move a route from one consensus set to another.
*
- * @param recipient the ultimate recipient of this message
- * @param sender the original sender of the message
- * @param specific_neighbor the specific neighbor to send this message via
- * @param message the packed message
- * @param message_size size of the message
- * @param importance what priority to send this message with
- * @param uid the unique identifier of this message (or 0 for none)
- * @param timeout how long to possibly delay sending this message
+ * @param route route to move
+ * @param new_distance new distance for the route (destination set)
*/
-static int
-send_message (const struct GNUNET_PeerIdentity * recipient,
- const struct GNUNET_PeerIdentity * sender,
- const struct DistantNeighbor * specific_neighbor,
- const struct GNUNET_MessageHeader * message,
- size_t message_size,
- unsigned int importance,
- unsigned int uid,
- struct GNUNET_TIME_Relative timeout)
+static void
+move_route (struct Route *route,
+ uint32_t new_distance)
{
- p2p_dv_MESSAGE_Data *toSend;
- unsigned int msg_size;
- unsigned int cost;
- unsigned int recipient_id;
- unsigned int sender_id;
- struct DistantNeighbor *target;
- struct DistantNeighbor *source;
- struct PendingMessage *pending_message;
- struct FindLeastCostContext find_least_ctx;
-#if DEBUG_DV_PEER_NUMBERS
- struct GNUNET_CRYPTO_HashAsciiEncoded encPeerFrom;
- struct GNUNET_CRYPTO_HashAsciiEncoded encPeerTo;
- struct GNUNET_CRYPTO_HashAsciiEncoded encPeerVia;
-#endif
- msg_size = message_size + sizeof (p2p_dv_MESSAGE_Data);
-
- find_least_ctx.least_cost = -1;
- find_least_ctx.target = NULL;
- /*
- * Need to find the least cost peer, lest the transport selection keep
- * picking the same DV route for the same destination which results
- * in messages looping forever. Relatively cheap, we don't iterate
- * over all known peers, just those that apply.
- */
- GNUNET_CONTAINER_multihashmap_get_multiple (extended_neighbors,
- &recipient->hashPubKey, &find_least_cost_peer, &find_least_ctx);
- target = find_least_ctx.target;
-
- if (target == NULL)
- {
- /* target unknown to us, drop! */
- return GNUNET_SYSERR;
- }
- recipient_id = target->referrer_id;
-
- source = GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
- &sender->hashPubKey);
- if (source == NULL)
- {
- if (0 != (memcmp (&my_identity,
- sender, sizeof (struct GNUNET_PeerIdentity))))
- {
- /* sender unknown to us, drop! */
- return GNUNET_SYSERR;
- }
- sender_id = 0; /* 0 == us */
- }
- else
- {
- /* find out the number that we use when we gossip about
- the sender */
- sender_id = source->our_id;
- }
-
-#if DEBUG_DV_PEER_NUMBERS
- GNUNET_CRYPTO_hash_to_enc (&source->identity.hashPubKey, &encPeerFrom);
- GNUNET_CRYPTO_hash_to_enc (&target->referrer->identity.hashPubKey, &encPeerVia);
- encPeerFrom.encoding[4] = '\0';
- encPeerVia.encoding[4] = '\0';
-#endif
- if ((sender_id != 0) && (0 == memcmp(&source->identity, &target->referrer->identity, sizeof(struct GNUNET_PeerIdentity))))
- {
- return 0;
- }
+ unsigned int i;
- cost = target->cost;
- pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + msg_size);
- pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
- pending_message->send_result = NULL;
- pending_message->importance = importance;
- pending_message->timeout = timeout;
- memcpy(&pending_message->recipient, &target->referrer->identity, sizeof(struct GNUNET_PeerIdentity));
- pending_message->msg_size = msg_size;
- toSend = (p2p_dv_MESSAGE_Data *)pending_message->msg;
- toSend->header.size = htons (msg_size);
- toSend->header.type = htons (GNUNET_MESSAGE_TYPE_DV_DATA);
- toSend->sender = htonl (sender_id);
- toSend->recipient = htonl (recipient_id);
-#if DEBUG_DV_MESSAGES
- toSend->uid = htonl(uid);
-#else
- toSend->uid = htonl(0);
-#endif
-
-#if DEBUG_DV_PEER_NUMBERS
- GNUNET_CRYPTO_hash_to_enc (&target->identity.hashPubKey, &encPeerTo);
- encPeerTo.encoding[4] = '\0';
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Sending DATA message. Sender id %u, source %s, destination %s, via %s\n", GNUNET_i2s(&my_identity), sender_id, &encPeerFrom, &encPeerTo, &encPeerVia);
-#endif
- memcpy (&toSend[1], message, message_size);
- if ((source != NULL) && (source->pkey == NULL)) /* Test our hypothesis about message failures! */
- {
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: Sending message, but anticipate recipient will not know sender!!!\n\n\n");
- }
- GNUNET_CONTAINER_DLL_insert_after (core_pending_head,
- core_pending_tail,
- core_pending_tail,
- pending_message);
-#if DEBUG_DV
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Notifying core of send size %d to destination `%s'\n", "DV SEND MESSAGE", msg_size, GNUNET_i2s(recipient));
-#endif
-
- GNUNET_SCHEDULER_add_now(sched, try_core_send, NULL);
- return (int) cost;
+ release_route (route);
+ i = get_consensus_slot (new_distance);
+ route->set_offset = i;
+ consensi[new_distance].targets[i] = route;
+ route->target.distance = htonl (new_distance);
}
-#if USE_PEER_ID
-struct CheckPeerContext
-{
- /**
- * Peer we found
- */
- struct DistantNeighbor *peer;
-
- /**
- * Sender id to search for
- */
- unsigned int sender_id;
-};
/**
- * Iterator over hash map entries.
+ * Initialize this neighbors 'my_set' and when done give
+ * it to the pending set operation for execution.
*
- * @param cls closure
- * @param key current key code
- * @param value value in the hash map
- * @return GNUNET_YES if we should continue to
- * iterate,
- * GNUNET_NO if not.
+ * @param cls the neighbor for which we are building the set
*/
-int checkPeerID (void *cls,
- const GNUNET_HashCode * key,
- void *value)
+static void
+build_set (void *cls)
{
- struct CheckPeerContext *ctx = cls;
- struct DistantNeighbor *distant = value;
+ struct DirectNeighbor *neighbor = cls;
+ struct GNUNET_SET_Element element;
- if (memcmp(key, &ctx->sender_id, sizeof(unsigned int)) == 0)
+ while ( (DEFAULT_FISHEYE_DEPTH - 1 > neighbor->consensus_insertion_distance) &&
+ (consensi[neighbor->consensus_insertion_distance].array_length == neighbor->consensus_insertion_offset) )
{
- ctx->peer = distant;
- return GNUNET_NO;
+ neighbor->consensus_insertion_offset = 0;
+ neighbor->consensus_insertion_distance++;
+ /* skip over NULL entries */
+ while ( (DEFAULT_FISHEYE_DEPTH - 1 > neighbor->consensus_insertion_distance) &&
+ (consensi[neighbor->consensus_insertion_distance].array_length < neighbor->consensus_insertion_offset) &&
+ (NULL == consensi[neighbor->consensus_insertion_distance].targets[neighbor->consensus_insertion_offset]) )
+ neighbor->consensus_insertion_offset++;
}
- return GNUNET_YES;
-
-}
-#endif
-
-
-/**
- * Handler for messages parsed out by the tokenizer from
- * DV DATA received for this peer.
- *
- * @param cls NULL
- * @param client the TokenizedMessageContext which contains message information
- * @param message the actual message
- */
-void tokenized_message_handler (void *cls,
- void *client,
- const struct GNUNET_MessageHeader *message)
-{
- struct TokenizedMessageContext *ctx = client;
- GNUNET_break_op (ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_GOSSIP);
- GNUNET_break_op (ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_DATA);
- if ( (ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_GOSSIP) &&
- (ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_DATA) )
+ if (DEFAULT_FISHEYE_DEPTH - 1 == neighbor->consensus_insertion_distance)
{
-#if DEBUG_DV_MESSAGES
+ /* we have added all elements to the set, run the operation */
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Receives %s message for me, uid %u, size %d, type %d cost %u from %s!\n", my_short_id, "DV DATA", ctx->uid, ntohs(message->size), ntohs(message->type), ctx->distant->cost, GNUNET_i2s(&ctx->distant->identity));
-#endif
- GNUNET_assert(memcmp(ctx->peer, &ctx->distant->identity, sizeof(struct GNUNET_PeerIdentity)) != 0);
- send_to_plugin(ctx->peer, message, ntohs(message->size), &ctx->distant->identity, ctx->distant->cost);
+ "Finished building my SET, committing\n");
+ GNUNET_SET_commit (neighbor->set_op,
+ neighbor->my_set);
+ GNUNET_SET_destroy (neighbor->my_set);
+ neighbor->my_set = NULL;
+ return;
}
-}
-
-#if DELAY_FORWARDS
-struct DelayedMessageContext
-{
- struct GNUNET_PeerIdentity dest;
- struct GNUNET_PeerIdentity sender;
- struct GNUNET_MessageHeader *message;
- size_t message_size;
- uint32_t uid;
-};
+ element.size = sizeof (struct Target);
+ element.type = htons (0); /* do we need this? */
+ element.data = &consensi[neighbor->consensus_insertion_distance].targets[neighbor->consensus_insertion_offset++]->target;
+
+ /* skip over NULL entries */
+ while ( (DEFAULT_FISHEYE_DEPTH - 1 > neighbor->consensus_insertion_distance) &&
+ (consensi[neighbor->consensus_insertion_distance].array_length < neighbor->consensus_insertion_offset) &&
+ (NULL == consensi[neighbor->consensus_insertion_distance].targets[neighbor->consensus_insertion_offset]) )
+ neighbor->consensus_insertion_offset++;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Adding element to SET\n");
+ GNUNET_SET_add_element (neighbor->my_set,
+ &element,
+ &build_set, neighbor);
-void send_message_delayed (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct DelayedMessageContext *msg_ctx = cls;
- if (msg_ctx != NULL)
- {
- send_message(&msg_ctx->dest,
- &msg_ctx->sender,
- NULL,
- msg_ctx->message,
- msg_ctx->message_size,
- default_dv_priority,
- msg_ctx->uid,
- GNUNET_TIME_relative_get_forever());
- GNUNET_free(msg_ctx->message);
- GNUNET_free(msg_ctx);
- }
}
-#endif
/**
- * Core handler for dv data messages. Whatever this message
- * contains all we really have to do is rip it out of its
- * DV layering and give it to our pal the DV plugin to report
- * in with.
+ * A peer is now connected to us at distance 1. Initiate DV exchange.
*
- * @param cls closure
- * @param peer peer which sent the message (immediate sender)
- * @param message the message
- * @param latency the latency of the connection we received the message from
- * @param distance the distance to the immediate peer
+ * @param neighbor entry for the neighbor at distance 1
*/
-static int handle_dv_data_message (void *cls,
- const struct GNUNET_PeerIdentity * peer,
- const struct GNUNET_MessageHeader * message,
- struct GNUNET_TIME_Relative latency,
- uint32_t distance)
+static void
+handle_direct_connect (struct DirectNeighbor *neighbor)
{
- const p2p_dv_MESSAGE_Data *incoming = (const p2p_dv_MESSAGE_Data *) message;
- const struct GNUNET_MessageHeader *packed_message;
- struct DirectNeighbor *dn;
- struct DistantNeighbor *pos;
- unsigned int sid; /* Sender id */
- unsigned int tid; /* Target id */
- struct GNUNET_PeerIdentity *original_sender;
- struct GNUNET_PeerIdentity *destination;
- struct FindDestinationContext fdc;
- struct TokenizedMessageContext tkm_ctx;
- int i;
- int found_pos;
-#if DELAY_FORWARDS
- struct DelayedMessageContext *delayed_context;
-#endif
-#if USE_PEER_ID
- struct CheckPeerContext checkPeerCtx;
-#endif
-#if DEBUG_DV_MESSAGES
- char *sender_id;
-#endif
- int ret;
- size_t packed_message_size;
- char *cbuf;
-
- packed_message_size = ntohs(incoming->header.size) - sizeof(p2p_dv_MESSAGE_Data);
-#if DEBUG_DV
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Receives DATA message from %s size %d, packed size %d!\n", my_short_id, GNUNET_i2s(peer) , ntohs(incoming->header.size), packed_message_size);
-#endif
-
- if (ntohs (incoming->header.size) < sizeof (p2p_dv_MESSAGE_Data) + sizeof (struct GNUNET_MessageHeader))
- {
-
-#if DEBUG_DV
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "`%s': Message sizes don't add up, total size %u, expected at least %u!\n", "dv service", ntohs(incoming->header.size), sizeof (p2p_dv_MESSAGE_Data) + sizeof (struct GNUNET_MessageHeader));
-#endif
- return GNUNET_SYSERR;
- }
+ struct Route *route;
+ struct GNUNET_HashCode h1;
+ struct GNUNET_HashCode h2;
+ struct GNUNET_HashCode session_id;
- dn = GNUNET_CONTAINER_multihashmap_get (direct_neighbors,
- &peer->hashPubKey);
- if (dn == NULL)
- return GNUNET_OK;
-
- sid = ntohl (incoming->sender);
-#if USE_PEER_ID
- if (sid != 0)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Direct connection to %s established, routing table exchange begins.\n",
+ GNUNET_i2s (&neighbor->peer));
+ GNUNET_STATISTICS_update (stats,
+ "# peers connected (1-hop)",
+ 1, GNUNET_NO);
+ route = GNUNET_CONTAINER_multipeermap_get (all_routes,
+ &neighbor->peer);
+ if (NULL != route)
{
- checkPeerCtx.sender_id = sid;
- checkPeerCtx.peer = NULL;
- GNUNET_CONTAINER_multihashmap_iterate(extended_neighbors, &checkPeerID, &checkPeerCtx);
- pos = checkPeerCtx.peer;
+ send_disconnect_to_plugin (&neighbor->peer);
+ release_route (route);
+ GNUNET_free (route);
}
- else
+ /* construct session ID seed as XOR of both peer's identities */
+ GNUNET_CRYPTO_hash (&my_identity, sizeof (my_identity), &h1);
+ GNUNET_CRYPTO_hash (&neighbor->peer, sizeof (struct GNUNET_PeerIdentity), &h2);
+ GNUNET_CRYPTO_hash_xor (&h1,
+ &h2,
+ &session_id);
+ /* make sure session ID is unique across applications by salting it with 'DV' */
+ GNUNET_CRYPTO_hkdf (&neighbor->real_session_id, sizeof (struct GNUNET_HashCode),
+ GCRY_MD_SHA512, GCRY_MD_SHA256,
+ "DV-SALT", 2,
+ &session_id, sizeof (session_id),
+ NULL, 0);
+ if (0 < memcmp (&neighbor->peer,
+ &my_identity,
+ sizeof (struct GNUNET_PeerIdentity)))
{
- pos = GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
- &peer->hashPubKey);
+ neighbor->initiate_task = GNUNET_SCHEDULER_add_now (&initiate_set_union,
+ neighbor);
}
-#else
- pos = dn->referee_head;
- while ((NULL != pos) && (pos->referrer_id != sid))
- pos = pos->next;
-#endif
-
- if (pos == NULL)
- {
-#if DEBUG_DV_MESSAGES
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: unknown sender (%u), Message uid %llu from %s!\n", my_short_id, ntohl(incoming->sender), ntohl(incoming->uid), GNUNET_i2s(&dn->identity));
- pos = dn->referee_head;
- while ((NULL != pos) && (pos->referrer_id != sid))
- {
- sender_id = strdup(GNUNET_i2s(&pos->identity));
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "I know sender %u %s\n", pos->referrer_id, sender_id);
- GNUNET_free(sender_id);
- pos = pos->next;
- }
-#endif
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- "%s: unknown sender (%u), Message uid %llu from %s!\n", my_short_id, ntohl(incoming->sender), ntohl(incoming->uid), GNUNET_i2s(&dn->identity));
-
- found_pos = -1;
- for (i = 0; i< MAX_OUTSTANDING_MESSAGES; i++)
- {
- if (dn->pending_messages[i].sender_id == 0)
- {
- found_pos = i;
- break;
- }
- }
-
- if (found_pos == -1)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- "%s: Too many unknown senders (%u), ignoring message! Message uid %llu from %s!\n", my_short_id, ntohl(incoming->sender), ntohl(incoming->uid), GNUNET_i2s(&dn->identity));
- }
- else
- {
- dn->pending_messages[found_pos].message = GNUNET_malloc(ntohs (message->size));
- memcpy(dn->pending_messages[found_pos].message, message, ntohs(message->size));
- dn->pending_messages[found_pos].distance = distance;
- dn->pending_messages[found_pos].latency = latency;
- memcpy(&dn->pending_messages[found_pos].sender, peer, sizeof(struct GNUNET_PeerIdentity));
- dn->pending_messages[found_pos].sender_id = sid;
- }
- /* unknown sender */
- return GNUNET_OK;
- }
- original_sender = &pos->identity;
- tid = ntohl (incoming->recipient);
- if (tid == 0)
- {
- /* 0 == us */
- cbuf = (char *)&incoming[1];
-
- tkm_ctx.peer = peer;
- tkm_ctx.distant = pos;
- tkm_ctx.uid = ntohl(incoming->uid);
- if (GNUNET_OK != GNUNET_SERVER_mst_receive (coreMST,
- &tkm_ctx,
- cbuf,
- packed_message_size,
- GNUNET_NO,
- GNUNET_NO))
- {
- GNUNET_break_op(0);
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: %s Received corrupt data, discarding!", my_short_id, "DV SERVICE");
- }
- return GNUNET_OK;
- }
- else
- {
- packed_message = (struct GNUNET_MessageHeader *)&incoming[1];
- }
-
- /* FIXME: this is the *only* per-request operation we have in DV
- that is O(n) in relation to the number of connected peers; a
- hash-table lookup could easily solve this (minor performance
- issue) */
- fdc.tid = tid;
- fdc.dest = NULL;
- GNUNET_CONTAINER_heap_iterate (neighbor_max_heap,
- &find_destination, &fdc);
-
-#if DEBUG_DV
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Receives %s message for someone else!\n", "dv", "DV DATA");
-#endif
-
- if (fdc.dest == NULL)
- {
-#if DEBUG_DV_MESSAGES
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Receives %s message uid %u for someone we don't know (id %u)!\n", my_short_id, "DV DATA", ntohl(incoming->uid), tid);
-#endif
- return GNUNET_OK;
- }
- destination = &fdc.dest->identity;
-
- if (0 == memcmp (destination, peer, sizeof (struct GNUNET_PeerIdentity)))
- {
- /* FIXME: create stat: routing loop-discard! */
-#if DEBUG_DV_PEER_NUMBERS
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "\n\n\nLoopy loo message\n\n\n");
-#endif
-
-#if DEBUG_DV_MESSAGES
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: DROPPING MESSAGE uid %u type %d, routing loop! Message immediately from %s!\n", my_short_id, ntohl(incoming->uid), ntohs(packed_message->type), GNUNET_i2s(&dn->identity));
-#endif
- return GNUNET_OK;
- }
-
- /* At this point we have a message, and we need to forward it on to the
- * next DV hop.
- */
-#if DEBUG_DV_MESSAGES
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: FORWARD %s message for %s, uid %u, size %d type %d, cost %u!\n", my_short_id, "DV DATA", GNUNET_i2s(destination), ntohl(incoming->uid), ntohs(packed_message->size), ntohs(packed_message->type), pos->cost);
-#endif
-
-#if DELAY_FORWARDS
- if (GNUNET_TIME_absolute_get_duration(pos->last_gossip).value < GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 2).value)
- {
- delayed_context = GNUNET_malloc(sizeof(struct DelayedMessageContext));
- memcpy(&delayed_context->dest, destination, sizeof(struct GNUNET_PeerIdentity));
- memcpy(&delayed_context->sender, original_sender, sizeof(struct GNUNET_PeerIdentity));
- delayed_context->message = GNUNET_malloc(packed_message_size);
- memcpy(delayed_context->message, packed_message, packed_message_size);
- delayed_context->message_size = packed_message_size;
- delayed_context->uid = ntohl(incoming->uid);
- GNUNET_SCHEDULER_add_delayed(sched, GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS, 2500), &send_message_delayed, delayed_context);
- return GNUNET_OK;
- }
- else
-#endif
- {
- ret = send_message(destination,
- original_sender,
- NULL,
- packed_message,
- packed_message_size,
- default_dv_priority,
- ntohl(incoming->uid),
- GNUNET_TIME_relative_get_forever());
- }
- if (ret != GNUNET_SYSERR)
- return GNUNET_OK;
else
- {
-#if DEBUG_MESSAGE_DROP
- direct_id = GNUNET_strdup(GNUNET_i2s(&dn->identity));
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: DROPPING MESSAGE type %d, forwarding failed! Message immediately from %s!\n", GNUNET_i2s(&my_identity), ntohs(((struct GNUNET_MessageHeader *)&incoming[1])->type), direct_id);
-#endif
- return GNUNET_SYSERR;
- }
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Starting SET listen operation\n");
+ neighbor->listen_handle = GNUNET_SET_listen (cfg,
+ GNUNET_SET_OPERATION_UNION,
+ &neighbor->real_session_id,
+ &listen_set_union,
+ neighbor);
+ }
}
-#if DEBUG_DV
-/**
- * Iterator over hash map entries.
- *
- * @param cls closure (NULL)
- * @param key current key code
- * @param value value in the hash map (DistantNeighbor)
- * @return GNUNET_YES if we should continue to
- * iterate,
- * GNUNET_NO if not.
- */
-int print_neighbors (void *cls,
- const GNUNET_HashCode * key,
- void *value)
-{
- struct DistantNeighbor *distant_neighbor = value;
- char my_shortname[5];
- char referrer_shortname[5];
- memcpy(&my_shortname, GNUNET_i2s(&my_identity), 4);
- my_shortname[4] = '\0';
- memcpy(&referrer_shortname, GNUNET_i2s(&distant_neighbor->referrer->identity), 4);
- referrer_shortname[4] = '\0';
-
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "`%s' %s: Peer `%s', distance %d, referrer `%s' pkey: %s\n", &my_shortname, "DV", GNUNET_i2s(&distant_neighbor->identity), distant_neighbor->cost, &referrer_shortname, distant_neighbor->pkey == NULL ? "no" : "yes");
- return GNUNET_YES;
-}
-#endif
/**
- * Scheduled task which gossips about known direct peers to other connected
- * peers. Will run until called with reason shutdown.
+ * Method called whenever a peer connects.
+ *
+ * @param cls closure
+ * @param peer peer identity this notification is about
*/
static void
-neighbor_send_task (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+handle_core_connect (void *cls,
+ const struct GNUNET_PeerIdentity *peer)
{
- struct NeighborSendContext *send_context = cls;
-#if DEBUG_DV_GOSSIP_SEND
- char * encPeerAbout;
- char * encPeerTo;
-#endif
- struct DistantNeighbor *about;
- struct DirectNeighbor *to;
- struct FastGossipNeighborList *about_list;
-
- p2p_dv_MESSAGE_NeighborInfo *message;
- struct PendingMessage *pending_message;
-
- if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
+ struct DirectNeighbor *neighbor;
+
+ /* Check for connect to self message */
+ if (0 == memcmp (&my_identity, peer, sizeof (struct GNUNET_PeerIdentity)))
+ return;
+ /* check if entry exists */
+ neighbor = GNUNET_CONTAINER_multipeermap_get (direct_neighbors,
+ peer);
+ if (NULL != neighbor)
{
-#if DEBUG_DV_GOSSIP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Called with reason shutdown, shutting down!\n",
- GNUNET_i2s(&my_identity));
-#endif
+ GNUNET_break (GNUNET_YES != neighbor->connected);
+ neighbor->connected = GNUNET_YES;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Core connected to %s (distance %u)\n",
+ GNUNET_i2s (peer),
+ (unsigned int) neighbor->distance);
+ if (DIRECT_NEIGHBOR_COST != neighbor->distance)
+ return;
+ handle_direct_connect (neighbor);
return;
}
-
- if (send_context->fast_gossip_list_head != NULL)
- {
- about_list = send_context->fast_gossip_list_head;
- about = about_list->about;
- GNUNET_CONTAINER_DLL_remove(send_context->fast_gossip_list_head,
- send_context->fast_gossip_list_tail,
- about_list);
- GNUNET_free(about_list);
- }
- else
- {
- /* FIXME: this may become a problem, because the heap walk has only one internal "walker". This means
- * that if two neighbor_send_tasks are operating in lockstep (which is quite possible, given default
- * values for all connected peers) there may be a serious bias as to which peers get gossiped about!
- * Probably the *best* way to fix would be to have an opaque pointer to the walk position passed as
- * part of the walk_get_next call. Then the heap would have to keep a list of walks, or reset the walk
- * whenever a modification has been detected. Yuck either way. Perhaps we could iterate over the heap
- * once to get a list of peers to gossip about and gossip them over time... But then if one goes away
- * in the mean time that becomes nasty. For now we'll just assume that the walking is done
- * asynchronously enough to avoid major problems (-;
- *
- * NOTE: probably fixed once we decided send rate based on allowed bandwidth.
- */
- about = GNUNET_CONTAINER_heap_walk_get_next (neighbor_min_heap);
- }
- to = send_context->toNeighbor;
-
- if ((about != NULL) && (to != about->referrer /* split horizon */ ) &&
-#if SUPPORT_HIDING
- (about->hidden == GNUNET_NO) &&
-#endif
- (to != NULL) &&
- (0 != memcmp (&about->identity,
- &to->identity, sizeof (struct GNUNET_PeerIdentity))) &&
- (about->pkey != NULL))
- {
-#if DEBUG_DV_GOSSIP_SEND
- encPeerAbout = GNUNET_strdup(GNUNET_i2s(&about->identity));
- encPeerTo = GNUNET_strdup(GNUNET_i2s(&to->identity));
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Sending info about peer %s id %u to directly connected peer %s\n",
- GNUNET_i2s(&my_identity),
- encPeerAbout, about->our_id, encPeerTo);
- GNUNET_free(encPeerAbout);
- GNUNET_free(encPeerTo);
-#endif
- about->last_gossip = GNUNET_TIME_absolute_get();
- pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(p2p_dv_MESSAGE_NeighborInfo));
- pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
- pending_message->importance = default_dv_priority;
- pending_message->timeout = GNUNET_TIME_relative_get_forever();
- memcpy(&pending_message->recipient, &to->identity, sizeof(struct GNUNET_PeerIdentity));
- pending_message->msg_size = sizeof(p2p_dv_MESSAGE_NeighborInfo);
- message = (p2p_dv_MESSAGE_NeighborInfo *)pending_message->msg;
- message->header.size = htons (sizeof (p2p_dv_MESSAGE_NeighborInfo));
- message->header.type = htons (GNUNET_MESSAGE_TYPE_DV_GOSSIP);
- message->cost = htonl (about->cost);
- message->neighbor_id = htonl (about->our_id);
-
- memcpy (&message->pkey, about->pkey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
- memcpy (&message->neighbor,
- &about->identity, sizeof (struct GNUNET_PeerIdentity));
-
- GNUNET_CONTAINER_DLL_insert_after (core_pending_head,
- core_pending_tail,
- core_pending_tail,
- pending_message);
-
- GNUNET_SCHEDULER_add_now(sched, try_core_send, NULL);
- /*if (core_transmit_handle == NULL)
- core_transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, default_dv_priority, GNUNET_TIME_relative_get_forever(), &to->identity, sizeof(p2p_dv_MESSAGE_NeighborInfo), &core_transmit_notify, NULL);*/
-
- }
-
- if (send_context->fast_gossip_list_head != NULL) /* If there are other peers in the fast list, schedule right away */
- {
-#if DEBUG_DV_PEER_NUMBERS
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "DV SERVICE: still in fast send mode\n");
-#endif
- send_context->task = GNUNET_SCHEDULER_add_now(sched, &neighbor_send_task, send_context);
- }
- else
- {
-#if DEBUG_DV_PEER_NUMBERS
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "DV SERVICE: entering slow send mode\n");
-#endif
- send_context->task = GNUNET_SCHEDULER_add_delayed(sched, GNUNET_DV_DEFAULT_SEND_INTERVAL, &neighbor_send_task, send_context);
- }
-
- return;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Core connected to %s (distance unknown)\n",
+ GNUNET_i2s (peer));
+ neighbor = GNUNET_new (struct DirectNeighbor);
+ neighbor->peer = *peer;
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multipeermap_put (direct_neighbors,
+ peer,
+ neighbor,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
+ neighbor->connected = GNUNET_YES;
+ neighbor->distance = 0; /* unknown */
}
/**
- * Handle START-message. This is the first message sent to us
- * by the client (can only be one!).
+ * Called for each 'target' in a neighbor table to free the associated memory.
*
- * @param cls closure (always NULL)
- * @param client identification of the client
- * @param message the actual message
+ * @param cls NULL
+ * @param key key of the value
+ * @param value value to free
+ * @return GNUNET_OK to continue to iterate
*/
-static void
-handle_start (void *cls,
- struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
+static int
+free_targets (void *cls,
+ const struct GNUNET_PeerIdentity *key,
+ void *value)
{
-
-#if DEBUG_DV
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Received `%s' request from client\n", "START");
-#endif
-
- client_handle = client;
-
- GNUNET_SERVER_client_keep(client_handle);
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ GNUNET_free (value);
+ return GNUNET_OK;
}
-#if UNSIMPLER
+
/**
- * Iterate over hash map entries for a distant neighbor,
- * if direct neighbor matches context call send message
+ * Multipeerhmap iterator for checking if a given route is
+ * (now) useful to this peer.
*
- * @param cls closure, a DV_SendContext
- * @param key current key code
- * @param value value in the hash map
- * @return GNUNET_YES if we should continue to
- * iterate,
- * GNUNET_NO if not.
+ * @param cls the direct neighbor for the given route
+ * @param key key value stored under
+ * @param value a 'struct Target' that may or may not be useful; not that
+ * the distance in 'target' does not include the first hop yet
+ * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
*/
-int send_iterator (void *cls,
- const GNUNET_HashCode * key,
- void *value)
+static int
+check_possible_route (void *cls,
+ const struct GNUNET_PeerIdentity *key,
+ void *value)
{
- struct DV_SendContext *send_context = cls;
- struct DistantNeighbor *distant_neighbor = value;
+ struct DirectNeighbor *neighbor = cls;
+ struct Target *target = value;
+ struct Route *route;
- if (memcmp(distant_neighbor->referrer, send_context->direct_peer, sizeof(struct GNUNET_PeerIdentity)) == 0) /* They match, send and free */
+ route = GNUNET_CONTAINER_multipeermap_get (all_routes,
+ key);
+ if (NULL != route)
+ {
+ if (ntohl (route->target.distance) > ntohl (target->distance) + 1)
{
- send_message_via(&my_identity, distant_neighbor, send_context);
- return GNUNET_NO;
+ /* this 'target' is cheaper than the existing route; switch to alternative route! */
+ move_route (route, ntohl (target->distance) + 1);
+ route->next_hop = neighbor;
+ send_distance_change_to_plugin (&target->peer, ntohl (target->distance) + 1);
}
+ return GNUNET_YES; /* got a route to this target already */
+ }
+ route = GNUNET_new (struct Route);
+ route->next_hop = neighbor;
+ route->target.distance = htonl (ntohl (target->distance) + 1);
+ route->target.peer = target->peer;
+ allocate_route (route, ntohl (route->target.distance));
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multipeermap_put (all_routes,
+ &route->target.peer,
+ route,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
+ send_connect_to_plugin (&route->target.peer, ntohl (target->distance));
return GNUNET_YES;
}
-#endif
+
/**
- * Service server's handler for message send requests (which come
- * bubbling up to us through the DV plugin).
+ * Multipeermap iterator for finding routes that were previously
+ * "hidden" due to a better route (called after a disconnect event).
*
- * @param cls closure
- * @param client identification of the client
- * @param message the actual message
+ * @param cls NULL
+ * @param key peer identity of the given direct neighbor
+ * @param value a 'struct DirectNeighbor' to check for additional routes
+ * @return GNUNET_YES to continue iteration
*/
-void handle_dv_send_message (void *cls,
- struct GNUNET_SERVER_Client * client,
- const struct GNUNET_MessageHeader * message)
+static int
+refresh_routes (void *cls,
+ const struct GNUNET_PeerIdentity *key,
+ void *value)
{
- struct GNUNET_DV_SendMessage *send_msg;
- struct GNUNET_DV_SendResultMessage *send_result_msg;
- struct PendingMessage *pending_message;
- size_t address_len;
- size_t message_size;
- struct GNUNET_PeerIdentity *destination;
- struct GNUNET_PeerIdentity *direct;
- struct GNUNET_MessageHeader *message_buf;
- char *temp_pos;
- int offset;
- static struct GNUNET_CRYPTO_HashAsciiEncoded dest_hash;
- struct DV_SendContext *send_context;
-#if DEBUG_DV_MESSAGES
- char *cbuf;
- struct GNUNET_MessageHeader *packed_message;
-#endif
-
- if (client_handle == NULL)
- {
- client_handle = client;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Setting initial client handle, never received `%s' message?\n", "dv", "START");
- }
- else if (client_handle != client)
- {
- client_handle = client;
- /* What should we do in this case, assert fail or just log the warning? */
-#if DEBUG_DV
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Setting client handle (was a different client!)!\n", "dv");
-#endif
- }
-
- GNUNET_assert(ntohs(message->size) > sizeof(struct GNUNET_DV_SendMessage));
- send_msg = (struct GNUNET_DV_SendMessage *)message;
+ struct DirectNeighbor *neighbor = value;
- address_len = ntohl(send_msg->addrlen);
- GNUNET_assert(address_len == sizeof(struct GNUNET_PeerIdentity) * 2);
- message_size = ntohs(message->size) - sizeof(struct GNUNET_DV_SendMessage) - address_len;
- destination = GNUNET_malloc(sizeof(struct GNUNET_PeerIdentity));
- direct = GNUNET_malloc(sizeof(struct GNUNET_PeerIdentity));
- message_buf = GNUNET_malloc(message_size);
-
- temp_pos = (char *)&send_msg[1]; /* Set pointer to end of message */
- offset = 0; /* Offset starts at zero */
-
- memcpy(destination, &temp_pos[offset], sizeof(struct GNUNET_PeerIdentity));
- offset += sizeof(struct GNUNET_PeerIdentity);
-
- memcpy(direct, &temp_pos[offset], sizeof(struct GNUNET_PeerIdentity));
- offset += sizeof(struct GNUNET_PeerIdentity);
-
-
- memcpy(message_buf, &temp_pos[offset], message_size);
- if (memcmp(&send_msg->target, destination, sizeof(struct GNUNET_PeerIdentity)) != 0)
- {
- GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */
- dest_hash.encoding[4] = '\0';
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: asked to send message to `%s', but address is for `%s'!", "DV SERVICE", GNUNET_i2s(&send_msg->target), (const char *)&dest_hash.encoding);
- }
-
-#if DEBUG_DV_MESSAGES
- cbuf = (char *)message_buf;
- offset = 0;
- while(offset < message_size)
- {
- packed_message = (struct GNUNET_MessageHeader *)&cbuf[offset];
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: DV PLUGIN SEND uid %u type %d to %s\n", my_short_id, ntohl(send_msg->uid), ntohs(packed_message->type), GNUNET_i2s(destination));
- offset += ntohs(packed_message->size);
- }
- /*GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: DV PLUGIN SEND uid %u type %d to %s\n", my_short_id, ntohl(send_msg->uid), ntohs(message_buf->type), GNUNET_i2s(destination));*/
-#endif
- GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */
- dest_hash.encoding[4] = '\0';
- send_context = GNUNET_malloc(sizeof(struct DV_SendContext));
-
- send_result_msg = GNUNET_malloc(sizeof(struct GNUNET_DV_SendResultMessage));
- send_result_msg->header.size = htons(sizeof(struct GNUNET_DV_SendResultMessage));
- send_result_msg->header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_DV_SEND_RESULT);
- send_result_msg->uid = send_msg->uid; /* No need to ntohl->htonl this */
-
- send_context->importance = ntohl(send_msg->priority);
- send_context->timeout = send_msg->timeout;
- send_context->direct_peer = direct;
- send_context->distant_peer = destination;
- send_context->message = message_buf;
- send_context->message_size = message_size;
- send_context->send_result = send_result_msg;
-#if DEBUG_DV_MESSAGES
- send_context->uid = send_msg->uid;
-#endif
-
- if (send_message_via(&my_identity, direct, send_context) != GNUNET_YES)
- {
- send_result_msg->result = htons(1);
- pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(struct GNUNET_DV_SendResultMessage));
- pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
- memcpy(&pending_message[1], send_result_msg, sizeof(struct GNUNET_DV_SendResultMessage));
- GNUNET_free(send_result_msg);
-
- GNUNET_CONTAINER_DLL_insert_after(plugin_pending_head, plugin_pending_tail, plugin_pending_tail, pending_message);
-
- if (client_handle != NULL)
- {
- if (plugin_transmit_handle == NULL)
- {
- plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle,
- sizeof(struct GNUNET_DV_SendResultMessage),
- GNUNET_TIME_UNIT_FOREVER_REL,
- &transmit_to_plugin, NULL);
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Failed to queue message for plugin, must be one in progress already!!\n");
- }
- }
- GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */
- dest_hash.encoding[4] = '\0';
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s DV SEND failed to send message to destination `%s' via `%s'\n", my_short_id, (const char *)&dest_hash.encoding, GNUNET_i2s(direct));
- }
-
- /* In bizarro world GNUNET_SYSERR indicates that we succeeded */
-#if UNSIMPLER
- if (GNUNET_SYSERR != GNUNET_CONTAINER_multihashmap_get_multiple(extended_neighbors, &destination->hashPubKey, &send_iterator, send_context))
- {
- send_result_msg->result = htons(1);
- pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(struct GNUNET_DV_SendResultMessage));
- pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
- memcpy(&pending_message[1], send_result_msg, sizeof(struct GNUNET_DV_SendResultMessage));
- GNUNET_free(send_result_msg);
-
- GNUNET_CONTAINER_DLL_insert_after(plugin_pending_head, plugin_pending_tail, plugin_pending_tail, pending_message);
-
- if (client_handle != NULL)
- {
- if (plugin_transmit_handle == NULL)
- {
- plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle,
- sizeof(struct GNUNET_DV_SendResultMessage),
- GNUNET_TIME_UNIT_FOREVER_REL,
- &transmit_to_plugin, NULL);
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Failed to queue message for plugin, must be one in progress already!!\n");
- }
- }
- GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */
- dest_hash.encoding[4] = '\0';
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s DV SEND failed to send message to destination `%s' via `%s'\n", my_short_id, (const char *)&dest_hash.encoding, GNUNET_i2s(direct));
- }
-#endif
- GNUNET_free(message_buf);
- GNUNET_free(send_context);
- GNUNET_free(direct);
- GNUNET_free(destination);
-
- GNUNET_SERVER_receive_done(client, GNUNET_OK);
+ if ( (GNUNET_YES != neighbor->connected) ||
+ (DIRECT_NEIGHBOR_COST != neighbor->distance) )
+ return GNUNET_YES;
+ if (NULL != neighbor->neighbor_table)
+ GNUNET_CONTAINER_multipeermap_iterate (neighbor->neighbor_table,
+ &check_possible_route,
+ neighbor);
+ return GNUNET_YES;
}
-/** Forward declarations **/
-static int handle_dv_gossip_message (void *cls,
- const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_MessageHeader *message,
- struct GNUNET_TIME_Relative latency,
- uint32_t distance);
-
-static int handle_dv_disconnect_message (void *cls,
- const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_MessageHeader *message,
- struct GNUNET_TIME_Relative latency,
- uint32_t distance);
-/** End forward declarations **/
-
/**
- * List of handlers for the messages understood by this
- * service.
+ * Get distance information from 'atsi'.
*
- * Hmm... will we need to register some handlers with core and
- * some handlers with our server here? Because core should be
- * getting the incoming DV messages (from whichever lower level
- * transport) and then our server should be getting messages
- * from the dv_plugin, right?
+ * @param atsi performance data
+ * @param atsi_count number of entries in atsi
+ * @return connected transport distance
*/
-static struct GNUNET_CORE_MessageHandler core_handlers[] = {
- {&handle_dv_data_message, GNUNET_MESSAGE_TYPE_DV_DATA, 0},
- {&handle_dv_gossip_message, GNUNET_MESSAGE_TYPE_DV_GOSSIP, 0},
- {&handle_dv_disconnect_message, GNUNET_MESSAGE_TYPE_DV_DISCONNECT, 0},
- {NULL, 0, 0}
-};
-
-static struct GNUNET_SERVER_MessageHandler plugin_handlers[] = {
- {&handle_dv_send_message, NULL, GNUNET_MESSAGE_TYPE_TRANSPORT_DV_SEND, 0},
- {&handle_start, NULL, GNUNET_MESSAGE_TYPE_DV_START, 0},
- {NULL, NULL, 0, 0}
-};
-
-/**
- * Free a DistantNeighbor node, including removing it
- * from the referer's list.
- */
-static void
-distant_neighbor_free (struct DistantNeighbor *referee)
+static uint32_t
+get_atsi_distance (const struct GNUNET_ATS_Information *atsi,
+ uint32_t atsi_count)
{
- struct DirectNeighbor *referrer;
+ uint32_t i;
- referrer = referee->referrer;
- if (referrer != NULL)
- {
- GNUNET_CONTAINER_DLL_remove (referrer->referee_head,
- referrer->referee_tail, referee);
- }
- GNUNET_CONTAINER_heap_remove_node (neighbor_max_heap, referee->max_loc);
- GNUNET_CONTAINER_heap_remove_node (neighbor_min_heap, referee->min_loc);
- GNUNET_CONTAINER_multihashmap_remove_all (extended_neighbors,
- &referee->identity.hashPubKey);
- GNUNET_free_non_null (referee->pkey);
- GNUNET_free (referee);
+ for (i = 0; i < atsi_count; i++)
+ if (ntohl (atsi[i].type) == GNUNET_ATS_QUALITY_NET_DISTANCE)
+ return (0 == ntohl (atsi->value)) ? DIRECT_NEIGHBOR_COST : ntohl (atsi->value); // FIXME: 0 check should not be required once ATS is fixed!
+ /* If we do not have explicit distance data, assume direct neighbor. */
+ return DIRECT_NEIGHBOR_COST;
}
-/**
- * Free a DirectNeighbor node, including removing it
- * from the referer's list.
- */
-static void
-direct_neighbor_free (struct DirectNeighbor *direct)
-{
- struct NeighborSendContext *send_context;
- struct FastGossipNeighborList *about_list;
- struct FastGossipNeighborList *prev_about;
-
- send_context = direct->send_context;
-
- if (send_context->task != GNUNET_SCHEDULER_NO_TASK)
- GNUNET_SCHEDULER_cancel(sched, send_context->task);
-
- about_list = send_context->fast_gossip_list_head;
- while (about_list != NULL)
- {
- GNUNET_CONTAINER_DLL_remove(send_context->fast_gossip_list_head, send_context->fast_gossip_list_tail, about_list);
- prev_about = about_list;
- about_list = about_list->next;
- GNUNET_free(prev_about);
- }
- GNUNET_free(send_context);
- GNUNET_free(direct);
-}
/**
- * Multihashmap iterator for sending out disconnect messages
- * for a peer.
+ * Multipeermap iterator for freeing routes that go via a particular
+ * neighbor that disconnected and is thus no longer available.
*
- * @param cls the peer that was disconnected
+ * @param cls the direct neighbor that is now unavailable
* @param key key value stored under
- * @param value the direct neighbor to send disconnect to
+ * @param value a 'struct Route' that may or may not go via neighbor
*
* @return GNUNET_YES to continue iteration, GNUNET_NO to stop
*/
-static int schedule_disconnect_messages (void *cls,
- const GNUNET_HashCode * key,
- void *value)
+static int
+cull_routes (void *cls,
+ const struct GNUNET_PeerIdentity *key,
+ void *value)
{
- struct DisconnectContext *disconnect_context = cls;
- struct DirectNeighbor *disconnected = disconnect_context->direct;
- struct DirectNeighbor *notify = value;
- struct PendingMessage *pending_message;
- p2p_dv_MESSAGE_Disconnect *disconnect_message;
-
- if (memcmp(¬ify->identity, &disconnected->identity, sizeof(struct GNUNET_PeerIdentity)) == 0)
- return GNUNET_YES; /* Don't send disconnect message to peer that disconnected! */
-
- pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(p2p_dv_MESSAGE_Disconnect));
- pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
- pending_message->importance = default_dv_priority;
- pending_message->timeout = GNUNET_TIME_relative_get_forever();
- memcpy(&pending_message->recipient, ¬ify->identity, sizeof(struct GNUNET_PeerIdentity));
- pending_message->msg_size = sizeof(p2p_dv_MESSAGE_Disconnect);
- disconnect_message = (p2p_dv_MESSAGE_Disconnect *)pending_message->msg;
- disconnect_message->header.size = htons (sizeof (p2p_dv_MESSAGE_Disconnect));
- disconnect_message->header.type = htons (GNUNET_MESSAGE_TYPE_DV_DISCONNECT);
- disconnect_message->peer_id = htonl(disconnect_context->distant->our_id);
-
- GNUNET_CONTAINER_DLL_insert_after (core_pending_head,
- core_pending_tail,
- core_pending_tail,
- pending_message);
-
- GNUNET_SCHEDULER_add_now(sched, try_core_send, NULL);
- /*if (core_transmit_handle == NULL)
- core_transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, default_dv_priority, GNUNET_TIME_relative_get_forever(), ¬ify->identity, sizeof(p2p_dv_MESSAGE_Disconnect), &core_transmit_notify, NULL);*/
-
+ struct DirectNeighbor *neighbor = cls;
+ struct Route *route = value;
+
+ if (route->next_hop != neighbor)
+ return GNUNET_YES; /* not affected */
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multipeermap_remove (all_routes, key, value));
+ release_route (route);
+ send_disconnect_to_plugin (&route->target.peer);
+ GNUNET_free (route);
return GNUNET_YES;
}
-/**
- * Multihashmap iterator for freeing extended neighbors.
- *
- * @param cls NULL
- * @param key key value stored under
- * @param value the distant neighbor to be freed
- *
- * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
- */
-static int free_extended_neighbors (void *cls,
- const GNUNET_HashCode * key,
- void *value)
-{
- struct DistantNeighbor *distant = value;
- distant_neighbor_free(distant);
- return GNUNET_YES;
-}
/**
- * Multihashmap iterator for freeing direct neighbors.
- *
- * @param cls NULL
- * @param key key value stored under
- * @param value the direct neighbor to be freed
+ * Handle the case that a direct connection to a peer is
+ * disrupted. Remove all routes via that peer and
+ * stop the consensus with it.
*
- * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
+ * @param neighbor peer that was disconnected (or at least is no
+ * longer at distance 1)
*/
-static int free_direct_neighbors (void *cls,
- const GNUNET_HashCode * key,
- void *value)
+static void
+handle_direct_disconnect (struct DirectNeighbor *neighbor)
{
- struct DirectNeighbor *direct = value;
- direct_neighbor_free(direct);
- return GNUNET_YES;
+ GNUNET_CONTAINER_multipeermap_iterate (all_routes,
+ &cull_routes,
+ neighbor);
+ if (NULL != neighbor->cth)
+ {
+ GNUNET_CORE_notify_transmit_ready_cancel (neighbor->cth);
+ neighbor->cth = NULL;
+ }
+ if (NULL != neighbor->neighbor_table_consensus)
+ {
+ GNUNET_CONTAINER_multipeermap_iterate (neighbor->neighbor_table_consensus,
+ &free_targets,
+ NULL);
+ GNUNET_CONTAINER_multipeermap_destroy (neighbor->neighbor_table_consensus);
+ neighbor->neighbor_table_consensus = NULL;
+ }
+ if (NULL != neighbor->neighbor_table)
+ {
+ GNUNET_CONTAINER_multipeermap_iterate (neighbor->neighbor_table,
+ &free_targets,
+ NULL);
+ GNUNET_CONTAINER_multipeermap_destroy (neighbor->neighbor_table);
+ neighbor->neighbor_table = NULL;
+ }
+ if (NULL != neighbor->set_op)
+ {
+ GNUNET_SET_operation_cancel (neighbor->set_op);
+ neighbor->set_op = NULL;
+ }
+ if (NULL != neighbor->my_set)
+ {
+ GNUNET_SET_destroy (neighbor->my_set);
+ neighbor->my_set = NULL;
+ }
+ if (NULL != neighbor->listen_handle)
+ {
+ GNUNET_SET_listen_cancel (neighbor->listen_handle);
+ neighbor->listen_handle = NULL;
+ }
+ if (GNUNET_SCHEDULER_NO_TASK != neighbor->initiate_task)
+ {
+ GNUNET_SCHEDULER_cancel (neighbor->initiate_task);
+ neighbor->initiate_task = GNUNET_SCHEDULER_NO_TASK;
+ }
}
/**
- * Task run during shutdown.
+ * Function that is called with QoS information about an address; used
+ * to update our current distance to another peer.
*
- * @param cls unused
- * @param tc unused
+ * @param cls closure
+ * @param address the address
+ * @param active is this address in active use
+ * @param bandwidth_out assigned outbound bandwidth for the connection
+ * @param bandwidth_in assigned inbound bandwidth for the connection
+ * @param ats performance data for the address (as far as known)
+ * @param ats_count number of performance records in 'ats'
*/
static void
-shutdown_task (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
-#if DEBUG_DV
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "calling CORE_DISCONNECT\n");
- GNUNET_CONTAINER_multihashmap_iterate(extended_neighbors, &print_neighbors, NULL);
-#endif
- GNUNET_CONTAINER_multihashmap_iterate(extended_neighbors, &free_extended_neighbors, NULL);
- GNUNET_CONTAINER_multihashmap_destroy(extended_neighbors);
- GNUNET_CONTAINER_multihashmap_iterate(direct_neighbors, &free_direct_neighbors, NULL);
- GNUNET_CONTAINER_multihashmap_destroy(direct_neighbors);
-
- GNUNET_CONTAINER_heap_destroy(neighbor_max_heap);
- GNUNET_CONTAINER_heap_destroy(neighbor_min_heap);
-
- GNUNET_CORE_disconnect (coreAPI);
- GNUNET_PEERINFO_disconnect(peerinfo_handle);
- GNUNET_SERVER_mst_destroy(coreMST);
- GNUNET_free_non_null(my_short_id);
-#if DEBUG_DV
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "CORE_DISCONNECT completed\n");
-#endif
-}
-
-/**
- * To be called on core init/fail.
- */
-void core_init (void *cls,
- struct GNUNET_CORE_Handle * server,
- const struct GNUNET_PeerIdentity *identity,
- const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded * publicKey)
+handle_ats_update (void *cls,
+ const struct GNUNET_HELLO_Address *address,
+ int active,
+ struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
+ struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
+ const struct GNUNET_ATS_Information *ats,
+ uint32_t ats_count)
{
+ struct DirectNeighbor *neighbor;
+ uint32_t distance;
- if (server == NULL)
+ if (GNUNET_NO == active)
+ return;
+ distance = get_atsi_distance (ats, ats_count);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "ATS says distance to %s is %u\n",
+ GNUNET_i2s (&address->peer),
+ (unsigned int) distance);
+ /* check if entry exists */
+ neighbor = GNUNET_CONTAINER_multipeermap_get (direct_neighbors,
+ &address->peer);
+ if (NULL != neighbor)
+ {
+ if ( (DIRECT_NEIGHBOR_COST == neighbor->distance) &&
+ (DIRECT_NEIGHBOR_COST == distance) )
+ return; /* no change */
+ if (DIRECT_NEIGHBOR_COST == neighbor->distance)
{
- GNUNET_SCHEDULER_cancel(sched, cleanup_task);
- GNUNET_SCHEDULER_add_now(sched, &shutdown_task, NULL);
+ neighbor->distance = distance;
+ GNUNET_STATISTICS_update (stats,
+ "# peers connected (1-hop)",
+ -1, GNUNET_NO);
+ handle_direct_disconnect (neighbor);
+ GNUNET_CONTAINER_multipeermap_iterate (direct_neighbors,
+ &refresh_routes,
+ NULL);
return;
}
-#if DEBUG_DV
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Core connection initialized, I am peer: %s\n", "dv", GNUNET_i2s(identity));
-#endif
- memcpy(&my_identity, identity, sizeof(struct GNUNET_PeerIdentity));
- my_short_id = GNUNET_strdup(GNUNET_i2s(&my_identity));
- coreAPI = server;
+ neighbor->distance = distance;
+ if (DIRECT_NEIGHBOR_COST != neighbor->distance)
+ return;
+ if (GNUNET_YES != neighbor->connected)
+ return;
+ handle_direct_connect (neighbor);
+ return;
+ }
+ neighbor = GNUNET_new (struct DirectNeighbor);
+ neighbor->peer = address->peer;
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multipeermap_put (direct_neighbors,
+ &address->peer,
+ neighbor,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
+ neighbor->connected = GNUNET_NO; /* not yet */
+ neighbor->distance = distance;
}
-#if PKEY_NO_NEIGHBOR_ON_ADD
/**
- * Iterator over hash map entries.
+ * Check if a target was removed from the set of the other peer; if so,
+ * if we also used it for our route, we need to remove it from our
+ * 'all_routes' set (and later check if an alternative path now exists).
*
- * @param cls closure
- * @param key current key code
- * @param value value in the hash map
- * @return GNUNET_YES if we should continue to
- * iterate,
- * GNUNET_NO if not.
+ * @param cls the 'struct DirectNeighbor'
+ * @param key peer identity for the target
+ * @param value a 'struct Target' previously reachable via the given neighbor
*/
-static int add_pkey_to_extended (void *cls,
- const GNUNET_HashCode * key,
- void *value)
+static int
+check_target_removed (void *cls,
+ const struct GNUNET_PeerIdentity *key,
+ void *value)
{
- struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pkey = cls;
- struct DistantNeighbor *distant_neighbor = value;
+ struct DirectNeighbor *neighbor = cls;
+ struct Target *new_target;
+ struct Route *current_route;
- if (distant_neighbor->pkey == NULL)
+ new_target = GNUNET_CONTAINER_multipeermap_get (neighbor->neighbor_table_consensus,
+ key);
+ if (NULL == new_target)
{
- distant_neighbor->pkey = GNUNET_malloc(sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
- memcpy(distant_neighbor->pkey, pkey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
+ /* target was revoked, check if it was used */
+ current_route = GNUNET_CONTAINER_multipeermap_get (all_routes,
+ key);
+ if ( (NULL == current_route) ||
+ (current_route->next_hop != neighbor) )
+ {
+ /* didn't matter, wasn't used */
+ return GNUNET_OK;
+ }
+ /* remove existing route */
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Lost route to %s\n",
+ GNUNET_i2s (¤t_route->target.peer));
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multipeermap_remove (all_routes, key, current_route));
+ send_disconnect_to_plugin (¤t_route->target.peer);
+ GNUNET_free (current_route);
+ neighbor->target_removed = GNUNET_YES;
+ return GNUNET_OK;
}
-
- return GNUNET_YES;
+ return GNUNET_OK;
}
-#endif
+
/**
- * Iterator over hash map entries.
+ * Check if a target was added to the set of the other peer; if it
+ * was added or impoves the existing route, do the needed updates.
*
- * @param cls closure
- * @param key current key code
- * @param value value in the hash map
- * @return GNUNET_YES if we should continue to
- * iterate,
- * GNUNET_NO if not.
+ * @param cls the 'struct DirectNeighbor'
+ * @param key peer identity for the target
+ * @param value a 'struct Target' now reachable via the given neighbor
*/
-static int update_matching_neighbors (void *cls,
- const GNUNET_HashCode * key,
- void *value)
+static int
+check_target_added (void *cls,
+ const struct GNUNET_PeerIdentity *key,
+ void *value)
{
- struct NeighborUpdateInfo * update_info = cls;
- struct DistantNeighbor *distant_neighbor = value;
-
- if (update_info->referrer == distant_neighbor->referrer) /* Direct neighbor matches, update it's info and return GNUNET_NO */
+ struct DirectNeighbor *neighbor = cls;
+ struct Target *target = value;
+ struct Route *current_route;
+
+ /* target was revoked, check if it was used */
+ current_route = GNUNET_CONTAINER_multipeermap_get (all_routes,
+ key);
+ if (NULL != current_route)
{
- /* same referrer, cost change! */
- GNUNET_CONTAINER_heap_update_cost (neighbor_max_heap,
- update_info->neighbor->max_loc, update_info->cost);
- GNUNET_CONTAINER_heap_update_cost (neighbor_min_heap,
- update_info->neighbor->min_loc, update_info->cost);
- update_info->neighbor->last_activity = update_info->now;
- update_info->neighbor->cost = update_info->cost;
- update_info->neighbor->referrer_id = update_info->referrer_peer_id;
- return GNUNET_NO;
+ /* route exists */
+ if (current_route->next_hop == neighbor)
+ {
+ /* we had the same route before, no change */
+ if (ntohl (target->distance) + 1 != ntohl (current_route->target.distance))
+ {
+ current_route->target.distance = htonl (ntohl (target->distance) + 1);
+ send_distance_change_to_plugin (&target->peer, ntohl (target->distance) + 1);
+ }
+ return GNUNET_OK;
+ }
+ if (ntohl (current_route->target.distance) >= ntohl (target->distance) + 1)
+ {
+ /* alternative, shorter route exists, ignore */
+ return GNUNET_OK;
+ }
+ /* new route is better than the existing one, take over! */
+ /* NOTE: minor security issue: malicious peers may advertise
+ very short routes to take over longer paths; as we don't
+ check that the shorter routes actually work, a malicious
+ direct neighbor can use this to DoS our long routes */
+ current_route->next_hop = neighbor;
+ current_route->target.distance = htonl (ntohl (target->distance) + 1);
+ send_distance_change_to_plugin (&target->peer, ntohl (target->distance) + 1);
+ return GNUNET_OK;
}
-
- return GNUNET_YES;
+ /* new route */
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Discovered new route to %s using %u hops\n",
+ GNUNET_i2s (&target->peer),
+ (unsigned int) (ntohl (target->distance) + 1));
+ current_route = GNUNET_new (struct Route);
+ current_route->next_hop = neighbor;
+ current_route->target.peer = target->peer;
+ current_route->target.distance = htonl (ntohl (target->distance) + 1);
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multipeermap_put (all_routes,
+ ¤t_route->target.peer,
+ current_route,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
+ send_connect_to_plugin (¤t_route->target.peer,
+ ntohl (current_route->target.distance));
+ return GNUNET_OK;
}
/**
- * Iterate over all current direct peers, add DISTANT newly connected
- * peer to the fast gossip list for that peer so we get DV routing
- * information out as fast as possible!
- *
- * @param cls the newly connected neighbor we will gossip about
- * @param key the hashcode of the peer
- * @param value the direct neighbor we should gossip to
+ * Callback for set operation results. Called for each element
+ * in the result set.
+ * We have learned a new route from the other peer. Add it to the
+ * route set we're building.
*
- * @return GNUNET_YES to continue iteration, GNUNET_NO otherwise
+ * @param cls the 'struct DirectNeighbor' we're building the consensus with
+ * @param element a result element, only valid if status is GNUNET_SET_STATUS_OK
+ * @param status see enum GNUNET_SET_Status
*/
-static int add_distant_all_direct_neighbors (void *cls,
- const GNUNET_HashCode * key,
- void *value)
+static void
+handle_set_union_result (void *cls,
+ const struct GNUNET_SET_Element *element,
+ enum GNUNET_SET_Status status)
{
- struct DirectNeighbor *direct = (struct DirectNeighbor *)value;
- struct DistantNeighbor *distant = (struct DistantNeighbor *)cls;
- struct NeighborSendContext *send_context = direct->send_context;
- struct FastGossipNeighborList *gossip_entry;
-#if DEBUG_DV
- char *encPeerAbout;
- char *encPeerTo;
-#endif
-
- if (distant == NULL)
+ struct DirectNeighbor *neighbor = cls;
+ struct Target *target;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Got SET union result: %d\n",
+ status);
+ switch (status)
+ {
+ case GNUNET_SET_STATUS_OK:
+ if (sizeof (struct Target) != element->size)
{
- return GNUNET_YES;
+ GNUNET_break_op (0);
+ return;
}
-
- if (memcmp(&direct->identity, &distant->identity, sizeof(struct GNUNET_PeerIdentity)) == 0)
+ target = GNUNET_new (struct Target);
+ memcpy (target, element->data, sizeof (struct Target));
+ if (GNUNET_YES !=
+ GNUNET_CONTAINER_multipeermap_put (neighbor->neighbor_table_consensus,
+ &target->peer,
+ target,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
{
- return GNUNET_YES; /* Don't gossip to a peer about itself! */
+ GNUNET_break_op (0);
+ GNUNET_free (target);
}
-
-#if SUPPORT_HIDING
- if (distant->hidden == GNUNET_YES)
- return GNUNET_YES; /* This peer should not be gossipped about (hidden) */
-#endif
- gossip_entry = GNUNET_malloc(sizeof(struct FastGossipNeighborList));
- gossip_entry->about = distant;
-
- GNUNET_CONTAINER_DLL_insert_after(send_context->fast_gossip_list_head,
- send_context->fast_gossip_list_tail,
- send_context->fast_gossip_list_tail,
- gossip_entry);
-#if DEBUG_DV
- encPeerAbout = GNUNET_strdup(GNUNET_i2s(&distant->identity));
- encPeerTo = GNUNET_strdup(GNUNET_i2s(&direct->identity));
-
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Fast send info about peer %s id %u for directly connected peer %s\n",
- GNUNET_i2s(&my_identity),
- encPeerAbout, distant->our_id, encPeerTo);
- GNUNET_free(encPeerAbout);
- GNUNET_free(encPeerTo);
-#endif
- /*if (send_context->task != GNUNET_SCHEDULER_NO_TASK)
- GNUNET_SCHEDULER_cancel(sched, send_context->task);*/
-
- send_context->task = GNUNET_SCHEDULER_add_now(sched, &neighbor_send_task, send_context);
- return GNUNET_YES;
+ break;
+ case GNUNET_SET_STATUS_TIMEOUT:
+ case GNUNET_SET_STATUS_FAILURE:
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Failed to establish DV union, will try again later\n");
+ neighbor->set_op = NULL;
+ if (NULL != neighbor->neighbor_table_consensus)
+ {
+ GNUNET_CONTAINER_multipeermap_iterate (neighbor->neighbor_table_consensus,
+ &free_targets,
+ NULL);
+ GNUNET_CONTAINER_multipeermap_destroy (neighbor->neighbor_table_consensus);
+ neighbor->neighbor_table_consensus = NULL;
+ }
+ if (0 < memcmp (&neighbor->peer,
+ &my_identity,
+ sizeof (struct GNUNET_PeerIdentity)))
+ neighbor->initiate_task = GNUNET_SCHEDULER_add_delayed (GNUNET_DV_CONSENSUS_FREQUENCY,
+ &initiate_set_union,
+ neighbor);
+ break;
+ case GNUNET_SET_STATUS_HALF_DONE:
+ /* we got all of our updates; integrate routing table! */
+ neighbor->target_removed = GNUNET_NO;
+ GNUNET_CONTAINER_multipeermap_iterate (neighbor->neighbor_table,
+ &check_target_removed,
+ neighbor);
+ if (GNUNET_YES == neighbor->target_removed)
+ {
+ /* check if we got an alternative for the removed routes */
+ GNUNET_CONTAINER_multipeermap_iterate (direct_neighbors,
+ &refresh_routes,
+ NULL);
+ }
+ /* add targets that appeared (and check for improved routes) */
+ GNUNET_CONTAINER_multipeermap_iterate (neighbor->neighbor_table_consensus,
+ &check_target_added,
+ neighbor);
+ if (NULL != neighbor->neighbor_table)
+ {
+ GNUNET_CONTAINER_multipeermap_iterate (neighbor->neighbor_table,
+ &free_targets,
+ NULL);
+ GNUNET_CONTAINER_multipeermap_destroy (neighbor->neighbor_table);
+ neighbor->neighbor_table = NULL;
+ }
+ neighbor->neighbor_table = neighbor->neighbor_table_consensus;
+ neighbor->neighbor_table_consensus = NULL;
+ break;
+ case GNUNET_SET_STATUS_DONE:
+ /* operation done, schedule next run! */
+ neighbor->set_op = NULL;
+ if (0 < memcmp (&neighbor->peer,
+ &my_identity,
+ sizeof (struct GNUNET_PeerIdentity)))
+ neighbor->initiate_task = GNUNET_SCHEDULER_add_delayed (GNUNET_DV_CONSENSUS_FREQUENCY,
+ &initiate_set_union,
+ neighbor);
+ break;
+ default:
+ GNUNET_break (0);
+ return;
+ }
}
+
/**
- * Callback for hello address creation.
+ * Start creating a new DV set union construction, our neighbour has
+ * asked for it (callback for listening peer).
*
- * @param cls closure, a struct HelloContext
- * @param max maximum number of bytes that can be written to buf
- * @param buf where to write the address information
- *
- * @return number of bytes written, 0 to signal the
- * end of the iteration.
+ * @param cls the 'struct DirectNeighbor' of the peer we're building
+ * a routing consensus with
+ * @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 size_t
-generate_hello_address (void *cls, size_t max, void *buf)
+static void
+listen_set_union (void *cls,
+ const struct GNUNET_PeerIdentity *other_peer,
+ const struct GNUNET_MessageHeader *context_msg,
+ struct GNUNET_SET_Request *request)
{
- struct HelloContext *hello_context = cls;
- char *addr_buffer;
- size_t offset;
- size_t size;
- size_t ret;
+ struct DirectNeighbor *neighbor = cls;
- if (hello_context->addresses_to_add == 0)
- return 0;
-
- /* Hello "address" will be concatenation of distant peer and direct peer identities */
- size = 2 * sizeof(struct GNUNET_PeerIdentity);
- GNUNET_assert(max >= size);
-
- addr_buffer = GNUNET_malloc(size);
- offset = 0;
- /* Copy the distant peer identity to buffer */
- memcpy(addr_buffer, &hello_context->distant_peer, sizeof(struct GNUNET_PeerIdentity));
- offset += sizeof(struct GNUNET_PeerIdentity);
- /* Copy the direct peer identity to buffer */
- memcpy(&addr_buffer[offset], hello_context->direct_peer, sizeof(struct GNUNET_PeerIdentity));
- ret = GNUNET_HELLO_add_address ("dv",
- GNUNET_TIME_relative_to_absolute
- (GNUNET_TIME_UNIT_HOURS), addr_buffer, size,
- buf, max);
-
- hello_context->addresses_to_add--;
-
- GNUNET_free(addr_buffer);
- return ret;
+ if (NULL == request)
+ return; /* why??? */
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Starting to create consensus with %s!\n",
+ GNUNET_i2s (&neighbor->peer));
+ if (NULL != neighbor->set_op)
+ {
+ GNUNET_SET_operation_cancel (neighbor->set_op);
+ neighbor->set_op = NULL;
+ }
+ if (NULL != neighbor->my_set)
+ {
+ GNUNET_SET_destroy (neighbor->my_set);
+ neighbor->my_set = NULL;
+ }
+ neighbor->my_set = GNUNET_SET_create (cfg,
+ GNUNET_SET_OPERATION_UNION);
+ neighbor->set_op = GNUNET_SET_accept (request,
+ GNUNET_SET_RESULT_ADDED,
+ &handle_set_union_result,
+ neighbor);
+ build_set (neighbor);
}
/**
- * Handles when a peer is either added due to being newly connected
- * or having been gossiped about, also called when the cost for a neighbor
- * needs to be updated.
- *
- * @param peer identity of the peer whose info is being added/updated
- * @param pkey public key of the peer whose info is being added/updated
- * @param referrer_peer_id id to use when sending to 'peer'
- * @param referrer if this is a gossiped peer, who did we hear it from?
- * @param cost the cost of communicating with this peer via 'referrer'
+ * Start creating a new DV set union by initiating the connection.
*
- * @return the added neighbor, the updated neighbor or NULL (neighbor
- * not added)
+ * @param cls the 'struct DirectNeighbor' of the peer we're building
+ * a routing consensus with
+ * @param tc scheduler context
*/
-static struct DistantNeighbor *
-addUpdateNeighbor (const struct GNUNET_PeerIdentity * peer, struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pkey,
- unsigned int referrer_peer_id,
- struct DirectNeighbor *referrer, unsigned int cost)
+static void
+initiate_set_union (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- struct DistantNeighbor *neighbor;
- struct DistantNeighbor *max;
- struct GNUNET_TIME_Absolute now;
- struct NeighborUpdateInfo *neighbor_update;
- struct HelloContext *hello_context;
- struct GNUNET_HELLO_Message *hello_msg;
- unsigned int our_id;
- char *addr1;
- char *addr2;
- int i;
-
-#if DEBUG_DV_PEER_NUMBERS
- char *encAbout;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s Received sender id (%u)!\n", "DV SERVICE", referrer_peer_id);
-#endif
-
- now = GNUNET_TIME_absolute_get ();
- neighbor = GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
- &peer->hashPubKey);
- neighbor_update = GNUNET_malloc(sizeof(struct NeighborUpdateInfo));
- neighbor_update->neighbor = neighbor;
- neighbor_update->cost = cost;
- neighbor_update->now = now;
- neighbor_update->referrer = referrer;
- neighbor_update->referrer_peer_id = referrer_peer_id;
-
- if (neighbor != NULL)
- {
-#if USE_PEER_ID
- memcpy(&our_id, &neighbor->identity, sizeof(unsigned int));
-#else
- our_id = neighbor->our_id;
-#endif
- }
- else
- {
-#if USE_PEER_ID
- memcpy(&our_id, peer, sizeof(unsigned int));
-#else
- our_id = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, RAND_MAX - 1) + 1;
-#endif
- }
-
- /* Either we do not know this peer, or we already do but via a different immediate peer */
- if ((neighbor == NULL) ||
- (GNUNET_CONTAINER_multihashmap_get_multiple(extended_neighbors,
- &peer->hashPubKey,
- &update_matching_neighbors,
- neighbor_update) != GNUNET_SYSERR))
- {
-
-#if AT_MOST_ONE
- if ((neighbor != NULL) && (cost < neighbor->cost)) /* New cost is less than old, remove old */
- {
- distant_neighbor_free(neighbor);
- }
- else if (neighbor != NULL) /* Only allow one DV connection to each peer */
- {
- return NULL;
- }
-#endif
- /* new neighbor! */
- if (cost > fisheye_depth)
- {
- /* too costly */
- GNUNET_free(neighbor_update);
- return NULL;
- }
-
-#if DEBUG_DV_PEER_NUMBERS
- encAbout = GNUNET_strdup(GNUNET_i2s(peer));
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: %s Chose NEW id (%u) for peer %s!\n", GNUNET_i2s(&my_identity), "DV SERVICE", our_id, encAbout);
- GNUNET_free(encAbout);
-#endif
-
- if (max_table_size <=
- GNUNET_CONTAINER_multihashmap_size (extended_neighbors))
- {
- /* remove most expensive entry */
- max = GNUNET_CONTAINER_heap_peek (neighbor_max_heap);
- GNUNET_assert(max != NULL);
- if (cost > max->cost)
- {
- /* new entry most expensive, don't create */
- GNUNET_free(neighbor_update);
- return NULL;
- }
- if (max->cost > 1)
- {
- /* only free if this is not a direct connection;
- we could theoretically have more direct
- connections than DV entries allowed total! */
- distant_neighbor_free (max);
- }
- }
-
- neighbor = GNUNET_malloc (sizeof (struct DistantNeighbor));
- GNUNET_CONTAINER_DLL_insert (referrer->referee_head,
- referrer->referee_tail, neighbor);
- neighbor->max_loc = GNUNET_CONTAINER_heap_insert (neighbor_max_heap,
- neighbor, cost);
- neighbor->min_loc = GNUNET_CONTAINER_heap_insert (neighbor_min_heap,
- neighbor, cost);
- neighbor->referrer = referrer;
- memcpy (&neighbor->identity, peer, sizeof (struct GNUNET_PeerIdentity));
- if (pkey != NULL) /* pkey will be null on direct neighbor addition */
- {
- neighbor->pkey = GNUNET_malloc(sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
- memcpy (neighbor->pkey, pkey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
- }
- else
- neighbor->pkey = pkey;
-
- neighbor->last_activity = now;
- neighbor->cost = cost;
- neighbor->referrer_id = referrer_peer_id;
- neighbor->our_id = our_id;
- neighbor->hidden =
- (cost == DIRECT_NEIGHBOR_COST) ? (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 4) ==
- 0) : GNUNET_NO;
-
- GNUNET_CONTAINER_multihashmap_put (extended_neighbors, &peer->hashPubKey,
- neighbor,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
- if (referrer_peer_id != 0)
- {
- for (i = 0; i< MAX_OUTSTANDING_MESSAGES; i++)
- {
- if (referrer->pending_messages[i].sender_id == referrer_peer_id) /* We have a queued message from just learned about peer! */
- {
-#if DEBUG_DV_MESSAGES
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: learned about peer %llu from which we have a previous unknown message, processing!\n", my_short_id, referrer_peer_id);
-#endif
- handle_dv_data_message(NULL, &referrer->pending_messages[i].sender, referrer->pending_messages[i].message, referrer->pending_messages[i].latency, referrer->pending_messages[i].distance);
- GNUNET_free(referrer->pending_messages[i].message);
- referrer->pending_messages[i].sender_id = 0;
- }
- }
- }
- if ((cost != DIRECT_NEIGHBOR_COST) && (neighbor->pkey != NULL))
- {
- /* Added neighbor, now send HELLO to transport */
- hello_context = GNUNET_malloc(sizeof(struct HelloContext));
- hello_context->direct_peer = &referrer->identity;
- memcpy(&hello_context->distant_peer, peer, sizeof(struct GNUNET_PeerIdentity));
- hello_context->addresses_to_add = 1;
- hello_msg = GNUNET_HELLO_create(pkey, &generate_hello_address, hello_context);
- GNUNET_assert(memcmp(hello_context->direct_peer, &hello_context->distant_peer, sizeof(struct GNUNET_PeerIdentity)) != 0);
- addr1 = GNUNET_strdup(GNUNET_i2s(hello_context->direct_peer));
- addr2 = GNUNET_strdup(GNUNET_i2s(&hello_context->distant_peer));
-#if DEBUG_DV
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: GIVING HELLO size %d for %s via %s to TRANSPORT\n", my_short_id, GNUNET_HELLO_size(hello_msg), addr2, addr1);
-#endif
- GNUNET_free(addr1);
- GNUNET_free(addr2);
- send_to_plugin(hello_context->direct_peer, GNUNET_HELLO_get_header(hello_msg), GNUNET_HELLO_size(hello_msg), &hello_context->distant_peer, cost);
- GNUNET_free(hello_context);
- GNUNET_free(hello_msg);
- }
+ struct DirectNeighbor *neighbor = cls;
- }
- else
- {
-#if DEBUG_DV_GOSSIP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Already know peer %s distance %d, referrer id %d!\n", "dv", GNUNET_i2s(peer), cost, referrer_peer_id);
-#endif
- }
-#if DEBUG_DV
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Size of extended_neighbors is %d\n", "dv", GNUNET_CONTAINER_multihashmap_size(extended_neighbors));
-#endif
-
- GNUNET_free(neighbor_update);
- return neighbor;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Initiating SET union\n");
+ neighbor->initiate_task = GNUNET_SCHEDULER_NO_TASK;
+ neighbor->my_set = GNUNET_SET_create (cfg,
+ GNUNET_SET_OPERATION_UNION);
+ neighbor->set_op = GNUNET_SET_prepare (&neighbor->peer,
+ &neighbor->real_session_id,
+ NULL,
+ 0 /* FIXME: salt */,
+ GNUNET_SET_RESULT_ADDED,
+ &handle_set_union_result,
+ neighbor);
+ build_set (neighbor);
}
/**
- * Core handler for dv disconnect messages. These will be used
- * by us to tell transport via the dv plugin that a peer can
- * no longer be contacted by us via a certain address. We should
- * then propagate these messages on, given that the distance to
- * the peer indicates we would have gossiped about it to others.
+ * Core handler for DV data messages. Whatever this message
+ * contains all we really have to do is rip it out of its
+ * DV layering and give it to our pal the DV plugin to report
+ * in with.
*
* @param cls closure
* @param peer peer which sent the message (immediate sender)
* @param message the message
- * @param latency the latency of the connection we received the message from
- * @param distance the distance to the immediate peer
+ * @return GNUNET_OK on success, GNUNET_SYSERR if the other peer violated the protocol
*/
-static int handle_dv_disconnect_message (void *cls,
- const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_MessageHeader *message,
- struct GNUNET_TIME_Relative latency,
- uint32_t distance)
+static int
+handle_dv_route_message (void *cls, const struct GNUNET_PeerIdentity *peer,
+ const struct GNUNET_MessageHeader *message)
{
- struct DirectNeighbor *referrer;
- struct DistantNeighbor *distant;
- p2p_dv_MESSAGE_Disconnect *enc_message = (p2p_dv_MESSAGE_Disconnect *)message;
+ const struct RouteMessage *rm;
+ const struct GNUNET_MessageHeader *payload;
+ struct Route *route;
- if (ntohs (message->size) < sizeof (p2p_dv_MESSAGE_Disconnect))
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Handling DV message\n");
+ if (ntohs (message->size) < sizeof (struct RouteMessage) + sizeof (struct GNUNET_MessageHeader))
+ {
+ GNUNET_break_op (0);
+ return GNUNET_SYSERR;
+ }
+ rm = (const struct RouteMessage *) message;
+ payload = (const struct GNUNET_MessageHeader *) &rm[1];
+ if (ntohs (message->size) != sizeof (struct RouteMessage) + ntohs (payload->size))
+ {
+ GNUNET_break_op (0);
+ return GNUNET_SYSERR;
+ }
+ if (0 == memcmp (&rm->target,
+ &my_identity,
+ sizeof (struct GNUNET_PeerIdentity)))
+ {
+ /* message is for me, check reverse route! */
+ route = GNUNET_CONTAINER_multipeermap_get (all_routes,
+ &rm->sender);
+ if (NULL == route)
{
- return GNUNET_SYSERR; /* invalid message */
+ /* don't have reverse route, drop */
+ GNUNET_STATISTICS_update (stats,
+ "# message discarded (no reverse route)",
+ 1, GNUNET_NO);
+ return GNUNET_OK;
}
-
- referrer = GNUNET_CONTAINER_multihashmap_get (direct_neighbors,
- &peer->hashPubKey);
- if (referrer == NULL)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Delivering %u bytes to myself!\n",
+ ntohs (payload->size));
+ send_data_to_plugin (payload,
+ &rm->sender,
+ ntohl (route->target.distance));
return GNUNET_OK;
-
- distant = referrer->referee_head;
- while (distant != NULL)
- {
- if (distant->referrer_id == ntohl(enc_message->peer_id))
- {
- distant_neighbor_free(distant);
- }
- distant = referrer->referee_head;
- }
-
+ }
+ route = GNUNET_CONTAINER_multipeermap_get (all_routes,
+ &rm->target);
+ if (NULL == route)
+ {
+ GNUNET_STATISTICS_update (stats,
+ "# messages discarded (no route)",
+ 1, GNUNET_NO);
+ return GNUNET_OK;
+ }
+ if (ntohl (route->target.distance) > ntohl (rm->distance) + 1)
+ {
+ GNUNET_STATISTICS_update (stats,
+ "# messages discarded (target too far)",
+ 1, GNUNET_NO);
+ return GNUNET_OK;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Forwarding message to %s\n",
+ GNUNET_i2s (&rm->target));
+ forward_payload (route->next_hop,
+ ntohl (route->target.distance),
+ 0,
+ &rm->target,
+ &rm->sender,
+ payload);
return GNUNET_OK;
}
/**
- * Core handler for dv gossip messages. These will be used
- * by us to create a HELLO message for the newly peer containing
- * which direct peer we can connect through, and what the cost
- * is. This HELLO will then be scheduled for validation by the
- * transport service so that it can be used by all others.
+ * Service server's handler for message send requests (which come
+ * bubbling up to us through the DV plugin).
*
* @param cls closure
- * @param peer peer which sent the message (immediate sender)
- * @param message the message
- * @param latency the latency of the connection we received the message from
- * @param distance the distance to the immediate peer
+ * @param client identification of the client
+ * @param message the actual message
*/
-static int handle_dv_gossip_message (void *cls,
- const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_MessageHeader *message,
- struct GNUNET_TIME_Relative latency,
- uint32_t distance)
+static void
+handle_dv_send_message (void *cls, struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
{
- struct DirectNeighbor *referrer;
- p2p_dv_MESSAGE_NeighborInfo *enc_message = (p2p_dv_MESSAGE_NeighborInfo *)message;
-
- if (ntohs (message->size) < sizeof (p2p_dv_MESSAGE_NeighborInfo))
- {
- return GNUNET_SYSERR; /* invalid message */
- }
+ struct Route *route;
+ const struct GNUNET_DV_SendMessage *msg;
+ const struct GNUNET_MessageHeader *payload;
-#if DEBUG_DV_GOSSIP_RECEIPT
- char * encPeerAbout;
- char * encPeerFrom;
-
- encPeerAbout = GNUNET_strdup(GNUNET_i2s(&enc_message->neighbor));
- encPeerFrom = GNUNET_strdup(GNUNET_i2s(peer));
+ if (ntohs (message->size) < sizeof (struct GNUNET_DV_SendMessage) + sizeof (struct GNUNET_MessageHeader))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ msg = (const struct GNUNET_DV_SendMessage *) message;
+ GNUNET_break (0 != ntohl (msg->uid));
+ payload = (const struct GNUNET_MessageHeader *) &msg[1];
+ if (ntohs (message->size) != sizeof (struct GNUNET_DV_SendMessage) + ntohs (payload->size))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ route = GNUNET_CONTAINER_multipeermap_get (all_routes,
+ &msg->target);
+ if (NULL == route)
+ {
+ /* got disconnected */
+ GNUNET_STATISTICS_update (stats,
+ "# local messages discarded (no route)",
+ 1, GNUNET_NO);
+ send_ack_to_plugin (&msg->target, ntohl (msg->uid), GNUNET_YES);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Received %s message from peer %s about peer %s id %u distance %d!\n", GNUNET_i2s(&my_identity), "DV GOSSIP", encPeerFrom, encPeerAbout, ntohl(enc_message->neighbor_id), ntohl (enc_message->cost) + 1);
- GNUNET_free(encPeerAbout);
- GNUNET_free(encPeerFrom);
-#endif
-
- referrer = GNUNET_CONTAINER_multihashmap_get (direct_neighbors,
- &peer->hashPubKey);
- if (referrer == NULL)
- return GNUNET_OK;
-
- addUpdateNeighbor (&enc_message->neighbor, &enc_message->pkey,
- ntohl (enc_message->neighbor_id),
- referrer, ntohl (enc_message->cost) + 1);
-
- return GNUNET_OK;
+ "Forwarding %u bytes to %s\n",
+ ntohs (payload->size),
+ GNUNET_i2s (&msg->target));
+
+ forward_payload (route->next_hop,
+ ntohl (route->target.distance),
+ htonl (msg->uid),
+ &msg->target,
+ &my_identity,
+ payload);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
}
/**
- * Iterate over all currently known peers, add them to the
- * fast gossip list for this peer so we get DV routing information
- * out as fast as possible!
- *
- * @param cls the direct neighbor we will gossip to
- * @param key the hashcode of the peer
- * @param value the distant neighbor we should add to the list
+ * Cleanup all of the data structures associated with a given neighbor.
*
- * @return GNUNET_YES to continue iteration, GNUNET_NO otherwise
+ * @param neighbor neighbor to clean up
*/
-static int add_all_extended_peers (void *cls,
- const GNUNET_HashCode * key,
- void *value)
+static void
+cleanup_neighbor (struct DirectNeighbor *neighbor)
{
- struct NeighborSendContext *send_context = (struct NeighborSendContext *)cls;
- struct DistantNeighbor *distant = (struct DistantNeighbor *)value;
- struct FastGossipNeighborList *gossip_entry;
-
- if (memcmp(&send_context->toNeighbor->identity, &distant->identity, sizeof(struct GNUNET_PeerIdentity)) == 0)
- return GNUNET_YES; /* Don't gossip to a peer about itself! */
-
-#if SUPPORT_HIDING
- if (distant->hidden == GNUNET_YES)
- return GNUNET_YES; /* This peer should not be gossipped about (hidden) */
-#endif
- gossip_entry = GNUNET_malloc(sizeof(struct FastGossipNeighborList));
- gossip_entry->about = distant;
-
- GNUNET_CONTAINER_DLL_insert_after(send_context->fast_gossip_list_head,
- send_context->fast_gossip_list_tail,
- send_context->fast_gossip_list_tail,
- gossip_entry);
+ struct PendingMessage *pending;
- return GNUNET_YES;
+ while (NULL != (pending = neighbor->pm_head))
+ {
+ neighbor->pm_queue_size--;
+ GNUNET_CONTAINER_DLL_remove (neighbor->pm_head,
+ neighbor->pm_tail,
+ pending);
+ GNUNET_free (pending);
+ }
+ handle_direct_disconnect (neighbor);
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multipeermap_remove (direct_neighbors,
+ &neighbor->peer,
+ neighbor));
+ GNUNET_free (neighbor);
}
-#if INSANE_GOSSIP
+
/**
- * Iterator over hash map entries.
+ * Method called whenever a given peer disconnects.
*
* @param cls closure
- * @param key current key code
- * @param value value in the hash map
- * @return GNUNET_YES if we should continue to
- * iterate,
- * GNUNET_NO if not.
+ * @param peer peer identity this notification is about
*/
-static int gossip_all_to_all_iterator (void *cls,
- const GNUNET_HashCode * key,
- void *value)
+static void
+handle_core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
{
- struct DirectNeighbor *direct = value;
-
- GNUNET_CONTAINER_multihashmap_iterate (extended_neighbors, &add_all_extended_peers, direct->send_context);
-
- if (direct->send_context->task != GNUNET_SCHEDULER_NO_TASK)
- GNUNET_SCHEDULER_cancel(sched, direct->send_context->task);
+ struct DirectNeighbor *neighbor;
- direct->send_context->task = GNUNET_SCHEDULER_add_now(sched, &neighbor_send_task, direct->send_context);
- return GNUNET_YES;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received core peer disconnect message for peer `%s'!\n",
+ GNUNET_i2s (peer));
+ /* Check for disconnect from self message */
+ if (0 == memcmp (&my_identity, peer, sizeof (struct GNUNET_PeerIdentity)))
+ return;
+ neighbor =
+ GNUNET_CONTAINER_multipeermap_get (direct_neighbors, peer);
+ if (NULL == neighbor)
+ {
+ GNUNET_break (0);
+ return;
+ }
+ GNUNET_break (GNUNET_YES == neighbor->connected);
+ neighbor->connected = GNUNET_NO;
+ if (DIRECT_NEIGHBOR_COST == neighbor->distance)
+ {
+ GNUNET_STATISTICS_update (stats,
+ "# peers connected (1-hop)",
+ -1, GNUNET_NO);
+ }
+ cleanup_neighbor (neighbor);
+ GNUNET_CONTAINER_multipeermap_iterate (direct_neighbors,
+ &refresh_routes,
+ NULL);
}
+
/**
- * Task run during shutdown.
+ * Multipeermap iterator for freeing routes. Should never be called.
*
- * @param cls unused
- * @param tc unused
+ * @param cls NULL
+ * @param key key value stored under
+ * @param value the route to be freed
+ *
+ * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
*/
-static void
-gossip_all_to_all (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+static int
+free_route (void *cls, const struct GNUNET_PeerIdentity * key, void *value)
{
- GNUNET_CONTAINER_multihashmap_iterate (direct_neighbors, &gossip_all_to_all_iterator, NULL);
+ struct Route *route = value;
+
+ GNUNET_break (0);
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multipeermap_remove (all_routes, key, value));
+ release_route (route);
+ send_disconnect_to_plugin (&route->target.peer);
+ GNUNET_free (route);
+ return GNUNET_YES;
+}
- GNUNET_SCHEDULER_add_delayed (sched,
- GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 5),
- &gossip_all_to_all,
- NULL);
-}
-#endif
/**
- * Iterate over all current direct peers, add newly connected peer
- * to the fast gossip list for that peer so we get DV routing
- * information out as fast as possible!
+ * Multipeermap iterator for freeing direct neighbors. Should never be called.
*
- * @param cls the newly connected neighbor we will gossip about
- * @param key the hashcode of the peer
- * @param value the direct neighbor we should gossip to
+ * @param cls NULL
+ * @param key key value stored under
+ * @param value the direct neighbor to be freed
*
- * @return GNUNET_YES to continue iteration, GNUNET_NO otherwise
+ * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
*/
-static int add_all_direct_neighbors (void *cls,
- const GNUNET_HashCode * key,
- void *value)
+static int
+free_direct_neighbors (void *cls, const struct GNUNET_PeerIdentity * key, void *value)
{
- struct DirectNeighbor *direct = (struct DirectNeighbor *)value;
- struct DirectNeighbor *to = (struct DirectNeighbor *)cls;
- struct DistantNeighbor *distant;
- struct NeighborSendContext *send_context = direct->send_context;
- struct FastGossipNeighborList *gossip_entry;
- char *direct_id;
-
-
- distant = GNUNET_CONTAINER_multihashmap_get(extended_neighbors, &to->identity.hashPubKey);
- if (distant == NULL)
- {
- return GNUNET_YES;
- }
-
- if (memcmp(&direct->identity, &to->identity, sizeof(struct GNUNET_PeerIdentity)) == 0)
- {
- return GNUNET_YES; /* Don't gossip to a peer about itself! */
- }
+ struct DirectNeighbor *neighbor = value;
-#if SUPPORT_HIDING
- if (distant->hidden == GNUNET_YES)
- return GNUNET_YES; /* This peer should not be gossipped about (hidden) */
-#endif
- direct_id = GNUNET_strdup(GNUNET_i2s(&direct->identity));
-#if DEBUG_DV_GOSSIP
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: adding peer %s to fast send list for %s\n", my_short_id, GNUNET_i2s(&distant->identity), direct_id);
-#endif
- GNUNET_free(direct_id);
- gossip_entry = GNUNET_malloc(sizeof(struct FastGossipNeighborList));
- gossip_entry->about = distant;
-
- GNUNET_CONTAINER_DLL_insert_after(send_context->fast_gossip_list_head,
- send_context->fast_gossip_list_tail,
- send_context->fast_gossip_list_tail,
- gossip_entry);
- if (send_context->task != GNUNET_SCHEDULER_NO_TASK)
- GNUNET_SCHEDULER_cancel(sched, send_context->task);
-
- send_context->task = GNUNET_SCHEDULER_add_now(sched, &neighbor_send_task, send_context);
- //tc.reason = GNUNET_SCHEDULER_REASON_TIMEOUT;
- //neighbor_send_task(send_context, &tc);
+ GNUNET_break (0);
+ cleanup_neighbor (neighbor);
return GNUNET_YES;
}
+
/**
- * Type of an iterator over the hosts. Note that each
- * host will be called with each available protocol.
+ * Task run during shutdown.
*
- * @param cls closure
- * @param peer id of the peer, NULL for last call
- * @param hello hello message for the peer (can be NULL)
- * @param trust amount of trust we have in the peer
+ * @param cls unused
+ * @param tc unused
*/
static void
-process_peerinfo (void *cls,
- const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_HELLO_Message *hello, uint32_t trust)
+shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- struct PeerIteratorContext *peerinfo_iterator = cls;
- struct DirectNeighbor *neighbor = peerinfo_iterator->neighbor;
- struct DistantNeighbor *distant = peerinfo_iterator->distant;
-#if DEBUG_DV_PEER_NUMBERS
- char *neighbor_pid;
-#endif
- int sent;
-
- if (peer == NULL)
- {
- if (distant->pkey == NULL)
- {
-#if DEBUG_DV
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Failed to get peerinfo information for this peer, retrying!\n");
-#endif
- peerinfo_iterator->ic = GNUNET_PEERINFO_iterate(peerinfo_handle,
- &peerinfo_iterator->neighbor->identity,
- 0,
- GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 3),
- &process_peerinfo,
- peerinfo_iterator);
- }
- else
- {
- GNUNET_free(peerinfo_iterator);
- }
- return;
- }
+ unsigned int i;
+
+ GNUNET_CORE_disconnect (core_api);
+ core_api = NULL;
+ GNUNET_ATS_performance_done (ats);
+ ats = NULL;
+ GNUNET_CONTAINER_multipeermap_iterate (direct_neighbors,
+ &free_direct_neighbors, NULL);
+ GNUNET_CONTAINER_multipeermap_iterate (all_routes,
+ &free_route, NULL);
+ GNUNET_CONTAINER_multipeermap_destroy (direct_neighbors);
+ GNUNET_CONTAINER_multipeermap_destroy (all_routes);
+ GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
+ stats = NULL;
+ GNUNET_SERVER_notification_context_destroy (nc);
+ nc = NULL;
+ for (i=0;i<DEFAULT_FISHEYE_DEPTH - 1;i++)
+ GNUNET_array_grow (consensi[i].targets,
+ consensi[i].array_length,
+ 0);
+}
- if (memcmp(&neighbor->identity, peer, sizeof(struct GNUNET_PeerIdentity) != 0))
- return;
- if ((hello != NULL) && (GNUNET_HELLO_get_key (hello, &neighbor->pkey) == GNUNET_OK))
- {
- if (distant->pkey == NULL)
- {
- distant->pkey = GNUNET_malloc(sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
- memcpy(distant->pkey, &neighbor->pkey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
- }
-
- sent = GNUNET_CONTAINER_multihashmap_iterate (extended_neighbors, &add_all_extended_peers, neighbor->send_context);
-
-#if DEBUG_DV_PEER_NUMBERS
- neighbor_pid = GNUNET_strdup(GNUNET_i2s(&neighbor->identity));
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Gossipped %d extended peers to %s\n", GNUNET_i2s(&my_identity), sent, neighbor_pid);
-#endif
- sent = GNUNET_CONTAINER_multihashmap_iterate (direct_neighbors, &add_all_direct_neighbors, neighbor);
-#if DEBUG_DV_PEER_NUMBERS
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Gossipped about %s to %d direct peers\n", GNUNET_i2s(&my_identity), neighbor_pid, sent);
- GNUNET_free(neighbor_pid);
-#endif
- neighbor->send_context->task = GNUNET_SCHEDULER_add_now(sched, &neighbor_send_task, neighbor->send_context);
- }
+/**
+ * Notify newly connected client about an existing route.
+ *
+ * @param cls the 'struct GNUNET_SERVER_Client'
+ * @param key peer identity
+ * @param value the XXX.
+ * @return GNUNET_OK (continue to iterate)
+ */
+static int
+add_route (void *cls,
+ const struct GNUNET_PeerIdentity *key,
+ void *value)
+{
+ struct GNUNET_SERVER_Client *client = cls;
+ struct Route *route = value;
+ struct GNUNET_DV_ConnectMessage cm;
+
+ cm.header.size = htons (sizeof (cm));
+ cm.header.type = htons (GNUNET_MESSAGE_TYPE_DV_CONNECT);
+ cm.distance = htonl (route->target.distance);
+ cm.peer = route->target.peer;
+
+ GNUNET_SERVER_notification_context_unicast (nc,
+ client,
+ &cm.header,
+ GNUNET_NO);
+ return GNUNET_OK;
}
/**
- * Method called whenever a peer connects.
+ * Handle START-message. This is the first message sent to us
+ * by the client (can only be one!).
*
- * @param cls closure
- * @param peer peer identity this notification is about
- * @param latency reported latency of the connection with peer
- * @param distance reported distance (DV) to peer
+ * @param cls closure (always NULL)
+ * @param client identification of the client
+ * @param message the actual message
*/
-void handle_core_connect (void *cls,
- const struct GNUNET_PeerIdentity * peer,
- struct GNUNET_TIME_Relative latency,
- uint32_t distance)
+static void
+handle_start (void *cls, struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
{
- struct DirectNeighbor *neighbor;
- struct DistantNeighbor *about;
- struct PeerIteratorContext *peerinfo_iterator;
- int sent;
-#if DEBUG_DV
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Receives core connect message for peer %s distance %d!\n", "dv", GNUNET_i2s(peer), distance);
-#endif
-
- if ((distance == DIRECT_NEIGHBOR_COST) && (GNUNET_CONTAINER_multihashmap_get(direct_neighbors, &peer->hashPubKey) == NULL))
- {
- peerinfo_iterator = GNUNET_malloc(sizeof(struct PeerIteratorContext));
- neighbor = GNUNET_malloc (sizeof (struct DirectNeighbor));
- neighbor->send_context = GNUNET_malloc(sizeof(struct NeighborSendContext));
- neighbor->send_context->toNeighbor = neighbor;
- memcpy (&neighbor->identity, peer, sizeof (struct GNUNET_PeerIdentity));
-
- GNUNET_assert(GNUNET_SYSERR != GNUNET_CONTAINER_multihashmap_put (direct_neighbors,
- &peer->hashPubKey,
- neighbor, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
- about = addUpdateNeighbor (peer, NULL, 0, neighbor, DIRECT_NEIGHBOR_COST);
- peerinfo_iterator->distant = about;
- peerinfo_iterator->neighbor = neighbor;
- peerinfo_iterator->ic = GNUNET_PEERINFO_iterate (peerinfo_handle,
- peer,
- 0,
- GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 3),
- &process_peerinfo,
- peerinfo_iterator);
-
- if ((about != NULL) && (about->pkey == NULL))
- {
-#if DEBUG_DV
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Newly added peer %s has NULL pkey!\n", GNUNET_i2s(peer));
-#endif
- }
- else if (about != NULL)
- {
- GNUNET_free(peerinfo_iterator);
- }
- }
- else
- {
- about = GNUNET_CONTAINER_multihashmap_get(extended_neighbors, &peer->hashPubKey);
- if ((GNUNET_CONTAINER_multihashmap_get(direct_neighbors, &peer->hashPubKey) == NULL) && (about != NULL))
- sent = GNUNET_CONTAINER_multihashmap_iterate(direct_neighbors, &add_distant_all_direct_neighbors, about);
-#if DEBUG_DV
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Distance (%d) greater than %d or already know about peer (%s), not re-adding!\n", "dv", distance, DIRECT_NEIGHBOR_COST, GNUNET_i2s(peer));
-#endif
- return;
- }
+ GNUNET_SERVER_notification_context_add (nc, client);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ GNUNET_CONTAINER_multipeermap_iterate (all_routes,
+ &add_route,
+ client);
}
+
/**
- * Method called whenever a given peer disconnects.
+ * Called on core init.
*
- * @param cls closure
- * @param peer peer identity this notification is about
+ * @param cls unused
+ * @param identity this peer's identity
*/
-void handle_core_disconnect (void *cls,
- const struct GNUNET_PeerIdentity * peer)
+static void
+core_init (void *cls,
+ const struct GNUNET_PeerIdentity *identity)
{
- struct DirectNeighbor *neighbor;
- struct DistantNeighbor *referee;
- struct FindDestinationContext fdc;
- struct DisconnectContext disconnect_context;
-
-#if DEBUG_DV
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Receives core peer disconnect message!\n", "dv");
-#endif
-
- neighbor =
- GNUNET_CONTAINER_multihashmap_get (direct_neighbors, &peer->hashPubKey);
- if (neighbor == NULL)
- {
- return;
- }
- while (NULL != (referee = neighbor->referee_head))
- distant_neighbor_free (referee);
-
- fdc.dest = NULL;
- fdc.tid = 0;
-
- GNUNET_CONTAINER_multihashmap_iterate (extended_neighbors, &find_distant_peer, &fdc);
-
- if (fdc.dest != NULL)
- {
- disconnect_context.direct = neighbor;
- disconnect_context.distant = fdc.dest;
- GNUNET_CONTAINER_multihashmap_iterate (direct_neighbors, &schedule_disconnect_messages, &disconnect_context);
- }
-
- GNUNET_assert (neighbor->referee_tail == NULL);
- if (GNUNET_NO == GNUNET_CONTAINER_multihashmap_remove (direct_neighbors,
- &peer->hashPubKey, neighbor))
- {
- GNUNET_break(0);
- }
- if ((neighbor->send_context != NULL) && (neighbor->send_context->task != GNUNET_SCHEDULER_NO_TASK))
- GNUNET_SCHEDULER_cancel(sched, neighbor->send_context->task);
- GNUNET_free (neighbor);
+ "I am peer: %s\n",
+ GNUNET_i2s (identity));
+ my_identity = *identity;
}
* Process dv requests.
*
* @param cls closure
- * @param scheduler scheduler to use
* @param server the initialized server
* @param c configuration to use
*/
static void
-run (void *cls,
- struct GNUNET_SCHEDULER_Handle *scheduler,
- struct GNUNET_SERVER_Handle *server,
+run (void *cls, struct GNUNET_SERVER_Handle *server,
const struct GNUNET_CONFIGURATION_Handle *c)
{
- unsigned long long max_hosts;
- sched = scheduler;
- cfg = c;
-
- /* FIXME: Read from config, or calculate, or something other than this! */
- max_hosts = DEFAULT_DIRECT_CONNECTIONS;
- max_table_size = DEFAULT_DV_SIZE;
- fisheye_depth = DEFAULT_FISHEYE_DEPTH;
-
- if (GNUNET_CONFIGURATION_have_value(cfg, "dv", "max_direct_connections"))
- GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "dv", "max_direct_connections", &max_hosts));
+ static struct GNUNET_CORE_MessageHandler core_handlers[] = {
+ {&handle_dv_route_message, GNUNET_MESSAGE_TYPE_DV_ROUTE, 0},
+ {NULL, 0, 0}
+ };
+ static struct GNUNET_SERVER_MessageHandler plugin_handlers[] = {
+ {&handle_start, NULL,
+ GNUNET_MESSAGE_TYPE_DV_START,
+ sizeof (struct GNUNET_MessageHeader) },
+ { &handle_dv_send_message, NULL,
+ GNUNET_MESSAGE_TYPE_DV_SEND,
+ 0},
+ {NULL, NULL, 0, 0}
+ };
- if (GNUNET_CONFIGURATION_have_value(cfg, "dv", "max_total_connections"))
- GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "dv", "max_total_connections", &max_table_size));
-
-
- if (GNUNET_CONFIGURATION_have_value(cfg, "dv", "fisheye_depth"))
- GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "dv", "fisheye_depth", &fisheye_depth));
-
- neighbor_min_heap =
- GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
- neighbor_max_heap =
- GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MAX);
-
- direct_neighbors = GNUNET_CONTAINER_multihashmap_create (max_hosts);
- extended_neighbors =
- GNUNET_CONTAINER_multihashmap_create (max_table_size * 3);
-
- GNUNET_SERVER_add_handlers (server, plugin_handlers);
- coreAPI =
- GNUNET_CORE_connect (sched,
- cfg,
- GNUNET_TIME_relative_get_forever(),
- NULL, /* FIXME: anything we want to pass around? */
- &core_init,
- &handle_core_connect,
- &handle_core_disconnect,
- NULL,
- GNUNET_NO,
- NULL,
- GNUNET_NO,
- core_handlers);
-
- if (coreAPI == NULL)
+ cfg = c;
+ direct_neighbors = GNUNET_CONTAINER_multipeermap_create (128, GNUNET_NO);
+ all_routes = GNUNET_CONTAINER_multipeermap_create (65536, GNUNET_NO);
+ core_api = GNUNET_CORE_connect (cfg, NULL,
+ &core_init,
+ &handle_core_connect,
+ &handle_core_disconnect,
+ NULL, GNUNET_NO,
+ NULL, GNUNET_NO,
+ core_handlers);
+
+ if (NULL == core_api)
return;
-
- coreMST = GNUNET_SERVER_mst_create (&tokenized_message_handler,
- NULL);
-
- peerinfo_handle = GNUNET_PEERINFO_connect(sched, cfg);
-
- if (peerinfo_handle == NULL)
- {
- GNUNET_CORE_disconnect(coreAPI);
- return;
- }
-
- /* Scheduled the task to clean up when shutdown is called */
- cleanup_task = GNUNET_SCHEDULER_add_delayed (sched,
- GNUNET_TIME_UNIT_FOREVER_REL,
- &shutdown_task,
- NULL);
+ ats = GNUNET_ATS_performance_init (cfg, &handle_ats_update, NULL);
+ if (NULL == ats)
+ {
+ GNUNET_CORE_disconnect (core_api);
+ return;
+ }
+ nc = GNUNET_SERVER_notification_context_create (server,
+ MAX_QUEUE_SIZE_PLUGIN);
+ stats = GNUNET_STATISTICS_create ("dv", cfg);
+ GNUNET_SERVER_add_handlers (server, plugin_handlers);
+ GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
+ &shutdown_task, NULL);
}
main (int argc, char *const *argv)
{
return (GNUNET_OK ==
- GNUNET_SERVICE_run (argc,
- argv,
- "dv",
- GNUNET_SERVICE_OPTION_NONE,
+ GNUNET_SERVICE_run (argc, argv, "dv", GNUNET_SERVICE_OPTION_NONE,
&run, NULL)) ? 0 : 1;
}
+
+/* end of gnunet-service-dv.c */
projects / oweals / gnunet.git / blobdiff