*
* @author Christian Grothoff
* @author Nathan Evans
- *
*/
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_hello_lib.h"
#include "gnunet_peerinfo_service.h"
#include "gnunet_statistics_service.h"
-#include "gnunet_consensus_service.h"
+#include "gnunet_set_service.h"
+#include "gnunet_ats_service.h"
#include "dv.h"
+#include <gcrypt.h>
+
/**
* How often do we establish the consensu?
*/
-#define GNUNET_DV_CONSENSUS_FREQUENCY GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MINUTES, 5))
+#define GNUNET_DV_CONSENSUS_FREQUENCY GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MINUTES, 5)
+
+/**
+ * Maximum number of messages we queue per peer.
+ */
+#define MAX_QUEUE_SIZE 16
+
+/**
+ * Maximum number of messages we queue towards the clients/plugin.
+ */
+#define MAX_QUEUE_SIZE_PLUGIN 1024
/**
* The default fisheye depth, from how many hops away will
*/
#define DIRECT_NEIGHBOR_COST 1
+
GNUNET_NETWORK_STRUCT_BEGIN
/**
struct GNUNET_PeerIdentity peer;
/**
- * How many hops (1-3) is this peer away?
+ * How many hops (1-3) is this peer away? in network byte order
*/
uint32_t distance GNUNET_PACKED;
/**
* Message exchanged between DV services (via core), requesting a
- * message to be routed.
+ * message to be routed.
*/
struct RouteMessage
{
*/
struct GNUNET_PeerIdentity target;
+ /**
+ * The (actual) sender of the message.
+ */
+ struct GNUNET_PeerIdentity sender;
+
};
GNUNET_NETWORK_STRUCT_END
* Identity of the peer.
*/
struct GNUNET_PeerIdentity peer;
-
+
+ /**
+ * 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 GNUNET_HashCode real_session_id;
+
/**
* Head of linked list of messages to send to this peer.
*/
* Transmit handle to core service.
*/
struct GNUNET_CORE_TransmitHandle *cth;
-};
+ /**
+ * 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 GNUNET_CONTAINER_MultiPeerMap *neighbor_table;
-/**
- * A route includes information about the next hop,
- * the target, and the ultimate distance to the
- * target.
- */
-struct Route
-{
+ /**
+ * 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_MultiPeerMap *neighbor_table_consensus;
/**
- * Which peer do we need to forward the message to?
+ * Our current (exposed) routing table as a set.
*/
- struct DirectNeighbor *next_hop;
+ struct GNUNET_SET_Handle *my_set;
/**
- * What would be the target, and how far is it away?
+ * Handle for our current active set union operation.
*/
- struct Target target;
+ struct GNUNET_SET_OperationHandle *set_op;
/**
- * Offset of this target in the respective consensus set.
+ * 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.
*/
- unsigned int set_offset;
+ struct GNUNET_SET_ListenHandle *listen_handle;
-};
+ /**
+ * ID of the task we use to (periodically) update our consensus
+ * with this peer. Used if we are the initiating peer.
+ */
+ GNUNET_SCHEDULER_TaskIdentifier initiate_task;
+ /**
+ * At what offset are we, with respect to inserting our own routes
+ * into the consensus?
+ */
+ unsigned int consensus_insertion_offset;
-/**
- * Routing neighbors are neighbors that we exchange
- * routing information with; that is, their distance
- * must be strictly less than the DEFAULT_FISHEYE_DEPTH;
- * they can also be direct neighbors.
- */
-struct RoutingNeighbor
-{
+ /**
+ * At what distance are we, with respect to inserting our own routes
+ * into the consensus?
+ */
+ unsigned int consensus_insertion_distance;
/**
- * Which peer is this, and how do we talk to it?
+ * Number of messages currently in the 'pm_XXXX'-DLL.
*/
- struct Route route;
+ unsigned int pm_queue_size;
/**
- * Routing table of the neighbor, NULL if not yet established.
- */
- struct GNUNET_CONTAINER_MultiHashMap *neighbor_table;
+ * Flag set within 'check_target_removed' to trigger full global route refresh.
+ */
+ int target_removed;
/**
- * Updated routing table of the neighbor, under construction,
- * NULL if we are not currently building it.
- */
- struct GNUNET_CONTAINER_MultiHashMap *neighbor_table_consensus;
+ * Our distance to this peer, 0 for unknown.
+ */
+ uint32_t distance;
+
+ /**
+ * Is this neighbor connected at the core level?
+ */
+ int connected;
+
+};
+
+
+/**
+ * A route includes information about the next hop,
+ * the target, and the ultimate distance to the
+ * target.
+ */
+struct Route
+{
/**
- * Active consensus, if we are currently synchronizing the
- * routing tables.
+ * Which peer do we need to forward the message to?
*/
- struct GNUNET_CONSENSUS_Handle *consensus;
+ struct DirectNeighbor *next_hop;
/**
- * At what offset are we, with respect to inserting our own routes
- * into the consensus?
+ * What would be the target, and how far is it away?
*/
- unsigned int consensus_insertion_offset;
+ struct Target target;
/**
- * At what distance are we, with respect to inserting our own routes
- * into the consensus?
+ * Offset of this target in the respective consensus set.
*/
- unsigned int consensus_insertion_distance;
+ unsigned int set_offset;
};
{
/**
- * Array of targets in the set, may include NULL
- * entries if a neighbor has disconnected; the
- * targets are allocated with the respective
- * 'struct Route', not here.
+ * 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 Target **targets;
+ struct Route **targets;
/**
* Size of the 'targets' array.
/**
- * Hashmap of all of our direct neighbors (no DV routing).
- */
-static struct GNUNET_CONTAINER_MultiHashMap *direct_neighbors;
-
-/**
- * Hashmap of all of the neighbors we exchange routing information
- * with (peers up to DEFAULT_FISHEYE_DEPTH - 1 distance from us).
+ * 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_MultiHashMap *routing_neighbors;
+static struct GNUNET_CONTAINER_MultiPeerMap *direct_neighbors;
/**
- * Hashmap with all routes that we currently support; contains
- * routing information for all peers up to distance DEFAULT_FISHEYE_DEPTH.
+ * Hashmap with all routes that we currently support; contains
+ * routing information for all peers from distance 2
+ * up to distance DEFAULT_FISHEYE_DEPTH.
*/
-static struct GNUNET_CONTAINER_MultiHashMap *all_routes;
+static struct GNUNET_CONTAINER_MultiPeerMap *all_routes;
/**
* Array of consensus sets we expose to the outside world. Sets
*/
static struct ConsensusSet consensi[DEFAULT_FISHEYE_DEPTH - 1];
-/**
- * ID of the task we use to (periodically) update our consensus
- * with other peers.
- */
-static GNUNET_SCHEDULER_Task consensus_task;
-
/**
* Handle to the core service api.
*/
static const struct GNUNET_CONFIGURATION_Handle *cfg;
/**
- * 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.
- */
-static struct GNUNET_SERVER_Client *client_handle;
-
-/**
- * Transmit handle to the plugin.
- */
-static struct GNUNET_SERVER_TransmitHandle *plugin_transmit_handle;
-
-/**
- * Head of DLL for client messages
- */
-static struct PendingMessage *plugin_pending_head;
-
-/**
- * Tail of DLL for client messages
+ * 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 PendingMessage *plugin_pending_tail;
+static struct GNUNET_SERVER_NotificationContext *nc;
/**
* Handle for the statistics service.
*/
-struct GNUNET_STATISTICS_Handle *stats;
+static struct GNUNET_STATISTICS_Handle *stats;
/**
- * How far out to keep peers we learn about.
+ * Handle to ATS service.
*/
-static unsigned long long fisheye_depth;
+static struct GNUNET_ATS_PerformanceHandle *ats;
/**
- * Get distance information from 'atsi'.
+ * Start creating a new DV set union by initiating the connection.
*
- * @param atsi performance data
- * @param atsi_count number of entries in atsi
- * @return connected transport distance
+ * @param cls the 'struct DirectNeighbor' of the peer we're building
+ * a routing consensus with
+ * @param tc scheduler context
*/
-static uint32_t
-get_atsi_distance (const struct GNUNET_ATS_Information *atsi,
- unsigned int atsi_count)
-{
- unsigned int i;
-
- for (i = 0; i < atsi_count; i++)
- if (ntohl (atsi[i].type) == GNUNET_ATS_QUALITY_NET_DISTANCE)
- return ntohl (atsi->value);
- /* FIXME: we do not have distance data? Assume direct neighbor. */
- return DIRECT_NEIGHBOR_COST;
-}
+static void
+initiate_set_union (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc);
/**
- * 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.
+ * Start creating a new DV set union construction, our neighbour has
+ * asked for it (callback for listening peer).
*
- * @param cls closure
- * @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 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
-transmit_to_plugin (void *cls, size_t size, void *buf)
-{
- char *cbuf = buf;
- struct PendingMessage *reply;
- size_t off;
- size_t msize;
-
- plugin_transmit_handle = NULL;
- if (NULL == buf)
- {
- /* client 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 (NULL != plugin_pending_head)
- plugin_transmit_handle =
- GNUNET_SERVER_notify_transmit_ready (client_handle,
- msize,
- GNUNET_TIME_UNIT_FOREVER_REL,
- &transmit_to_plugin, NULL);
- return off;
-}
+static void
+listen_set_union (void *cls,
+ const struct GNUNET_PeerIdentity *other_peer,
+ const struct GNUNET_MessageHeader *context_msg,
+ struct GNUNET_SET_Request *request);
/**
* Forward a message from another peer to the plugin.
*
* @param message the message to send to the plugin
- * @param distant_neighbor the original sender of the message
- * @param distnace distance to the original sender of the message
+ * @param origin the original sender of the message
+ * @param distance distance to the original sender of the message
*/
static void
-send_data_to_plugin (const struct GNUNET_MessageHeader *message,
- struct GNUNET_PeerIdentity *distant_neighbor,
+send_data_to_plugin (const struct GNUNET_MessageHeader *message,
+ const struct GNUNET_PeerIdentity *origin,
uint32_t distance)
{
struct GNUNET_DV_ReceivedMessage *received_msg;
- struct PendingMessage *pending_message;
size_t size;
- if (NULL == client_handle)
- {
- GNUNET_STATISTICS_update (stats,
- "# messages discarded (no plugin)",
- 1, GNUNET_NO);
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- _("Refusing to queue messages, DV plugin not active.\n"));
- return;
- }
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Delivering message from peer `%s'\n",
- GNUNET_i2s (distant_neighbor));
- size = sizeof (struct GNUNET_DV_ReceivedMessage) +
+ 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;
}
- pending_message = GNUNET_malloc (sizeof (struct PendingMessage) + size);
- received_msg = (struct GNUNET_DV_ReceivedMessage *) &pending_message[1];
+ received_msg = GNUNET_malloc (size);
received_msg->header.size = htons (size);
- received_msg->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_DV_RECV);
+ received_msg->header.type = htons (GNUNET_MESSAGE_TYPE_DV_RECV);
received_msg->distance = htonl (distance);
- received_msg->sender = *distant_neighbor;
+ received_msg->sender = *origin;
memcpy (&received_msg[1], message, ntohs (message->size));
- GNUNET_CONTAINER_DLL_insert_tail (plugin_pending_head,
- plugin_pending_tail,
- pending_message);
- if (NULL == plugin_transmit_handle)
- plugin_transmit_handle =
- GNUNET_SERVER_notify_transmit_ready (client_handle, size,
- GNUNET_TIME_UNIT_FOREVER_REL,
- &transmit_to_plugin, NULL);
+ GNUNET_SERVER_notification_context_broadcast (nc,
+ &received_msg->header,
+ GNUNET_YES);
+ GNUNET_free (received_msg);
+}
+
+
+/**
+ * Forward a control message to the plugin.
+ *
+ * @param message the message to send to the plugin
+ */
+static void
+send_control_to_plugin (const struct GNUNET_MessageHeader *message)
+{
+ GNUNET_SERVER_notification_context_broadcast (nc,
+ message,
+ GNUNET_NO);
}
/**
- * Give an ACK message to the plugin, we transmitted a message for it.
+ * 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 void
-send_ack_to_plugin (struct GNUNET_PeerIdentity *target,
- uint32_t uid)
+send_ack_to_plugin (const struct GNUNET_PeerIdentity *target,
+ uint32_t uid,
+ int nack)
{
- struct GNUNET_DV_AckMessage *ack_msg;
- struct PendingMessage *pending_message;
- size_t size;
+ struct GNUNET_DV_AckMessage ack_msg;
- if (NULL == client_handle)
- {
- GNUNET_STATISTICS_update (stats,
- "# acks discarded (no plugin)",
- 1, GNUNET_NO);
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- _("Refusing to queue messages, DV plugin not active.\n"));
- return;
- }
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Delivering ACK for message to peer `%s'\n",
GNUNET_i2s (target));
- size = sizeof (struct GNUNET_DV_AckMessage);
- pending_message = GNUNET_malloc (sizeof (struct PendingMessage) + size);
- ack_msg = (struct GNUNET_DV_AckMessage *) &pending_message[1];
- ack_msg->header.size = htons (size);
- ack_msg->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_DV_SEND_ACK);
- ack_msg->uid = htonl (uid);
- ack_msg->target = *target;
- GNUNET_CONTAINER_DLL_insert_tail (plugin_pending_head,
- plugin_pending_tail,
- pending_message);
- if (NULL == plugin_transmit_handle)
- plugin_transmit_handle =
- GNUNET_SERVER_notify_transmit_ready (client_handle, size,
- GNUNET_TIME_UNIT_FOREVER_REL,
- &transmit_to_plugin, NULL);
+ 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);
+}
+
+
+/**
+ * Send a DISTANCE_CHANGED message to the plugin.
+ *
+ * @param peer peer with a changed distance
+ * @param distance new distance to the peer
+ */
+static void
+send_distance_change_to_plugin (const struct GNUNET_PeerIdentity *peer,
+ uint32_t distance)
+{
+ struct GNUNET_DV_DistanceUpdateMessage du_msg;
+
+ 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);
+}
+
+
+/**
+ * Give a CONNECT message to the plugin.
+ *
+ * @param target peer that connected
+ * @param distance distance to the target
+ */
+static void
+send_connect_to_plugin (const struct GNUNET_PeerIdentity *target,
+ uint32_t distance)
+{
+ struct GNUNET_DV_ConnectMessage cm;
+
+ 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);
+}
+
+
+/**
+ * Give a DISCONNECT message to the plugin.
+ *
+ * @param target peer that disconnected
+ */
+static void
+send_disconnect_to_plugin (const struct GNUNET_PeerIdentity *target)
+{
+ struct GNUNET_DV_DisconnectMessage dm;
+
+ 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);
}
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);
- send_ack_to_plugin (&pending->ultimate_target,
- pending->uid);
+ if (0 != pending->uid)
+ send_ack_to_plugin (&pending->ultimate_target,
+ pending->uid,
+ GNUNET_NO);
GNUNET_free (pending);
off += msize;
}
0 /* priority */,
GNUNET_TIME_UNIT_FOREVER_REL,
&dn->peer,
- msize,
+ msize,
&core_transmit_notify, dn);
return off;
}
-#if 0
-// ////////////////////////////////////////////////////////////////////////
-
-
/**
- * Send a DV data message via DV.
+ * Forward the given payload to the given target.
*
- * @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 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
*/
-static int
-send_message_via (const struct GNUNET_PeerIdentity *sender,
- const struct GNUNET_PeerIdentity *recipient,
- struct DV_SendContext *send_context)
+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)
{
- 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;
-
- 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;
+ struct PendingMessage *pm;
+ struct RouteMessage *rm;
+ size_t msize;
- if (0 == (memcmp (&my_identity, sender, sizeof (struct GNUNET_PeerIdentity))))
+ if ( (target->pm_queue_size >= MAX_QUEUE_SIZE) &&
+ (0 != memcmp (sender,
+ &my_identity,
+ 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));
+ GNUNET_break (0 == uid);
+ return;
}
- else
+ msize = sizeof (struct RouteMessage) + ntohs (payload->size);
+ if (msize >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
{
- 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;
+ 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);
+}
- 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);
+/**
+ * Find a free slot for storing a 'route' in the 'consensi'
+ * set at the given distance.
+ *
+ * @param distance distance to use for the set slot
+ */
+static unsigned int
+get_consensus_slot (uint32_t distance)
+{
+ 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;
+}
- GNUNET_SCHEDULER_add_now (try_core_send, NULL);
- return GNUNET_YES;
+/**
+ * Allocate a slot in the consensus set for a route.
+ *
+ * @param route route to initialize
+ * @param distance which consensus set to use
+ */
+static void
+allocate_route (struct Route *route,
+ uint32_t distance)
+{
+ unsigned int i;
+
+ 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
+ * @param route route to release the slot from
+ */
+static void
+release_route (struct Route *route)
+{
+ consensi[ntohl (route->target.distance)].targets[route->set_offset] = NULL;
+ route->set_offset = UINT_MAX; /* indicate invalid slot */
+}
+
+
+/**
+ * Move a route from one consensus set to another.
*
- * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
+ * @param route route to move
+ * @param new_distance new distance for the route (destination set)
*/
-static int
-find_least_cost_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
+static void
+move_route (struct Route *route,
+ uint32_t new_distance)
{
- struct FindLeastCostContext *find_context = cls;
- struct DistantNeighbor *dn = value;
+ unsigned int i;
- if (dn->cost < find_context->least_cost)
- {
- find_context->target = dn;
- }
- if (dn->cost == DIRECT_NEIGHBOR_COST)
- return GNUNET_NO;
- return GNUNET_YES;
+ 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);
}
+
/**
- * Send a DV data message via DV.
+ * Initialize this neighbors 'my_set' and when done give
+ * it to the pending set operation for execution.
*
- * @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 cls the neighbor for which we are building the 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
+build_set (void *cls)
{
- 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;
+ struct DirectNeighbor *neighbor = cls;
+ struct GNUNET_SET_Element element;
- source =
- GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
- &sender->hashPubKey);
- if (source == NULL)
+ while ( (DEFAULT_FISHEYE_DEPTH - 1 > neighbor->consensus_insertion_distance) &&
+ (consensi[neighbor->consensus_insertion_distance].array_length == neighbor->consensus_insertion_offset) )
{
- if (0 !=
- (memcmp (&my_identity, sender, sizeof (struct GNUNET_PeerIdentity))))
- {
- /* sender unknown to us, drop! */
- return GNUNET_SYSERR;
- }
- sender_id = 0; /* 0 == us */
+ 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++;
}
- else
+ if (DEFAULT_FISHEYE_DEPTH - 1 == neighbor->consensus_insertion_distance)
{
- /* find out the number that we use when we gossip about
- * the sender */
- sender_id = source->our_id;
+ /* we have added all elements to the set, run the operation */
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "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;
}
+ 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);
-#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;
- }
+}
- 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",
- my_short_id);
- }
- 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 (try_core_send, NULL);
- return (int) cost;
-}
-
-#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.
+ * A peer is now connected to us at distance 1. Initiate DV exchange.
*
- * @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 neighbor entry for the neighbor at distance 1
*/
-int
-checkPeerID (void *cls, const struct GNUNET_HashCode * key, void *value)
+static void
+handle_direct_connect (struct DirectNeighbor *neighbor)
{
- struct CheckPeerContext *ctx = cls;
- struct DistantNeighbor *distant = value;
+ struct Route *route;
+ struct GNUNET_HashCode h1;
+ struct GNUNET_HashCode h2;
+ struct GNUNET_HashCode session_id;
- if (memcmp (key, &ctx->sender_id, sizeof (unsigned int)) == 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)
{
- ctx->peer = distant;
- return GNUNET_NO;
+ send_disconnect_to_plugin (&neighbor->peer);
+ release_route (route);
+ GNUNET_free (route);
+ }
+ /* 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)))
+ {
+ neighbor->initiate_task = GNUNET_SCHEDULER_add_now (&initiate_set_union,
+ neighbor);
+ }
+ else
+ {
+ 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);
}
- return GNUNET_YES;
-
}
-#endif
/**
- * Handler for messages parsed out by the tokenizer from
- * DV DATA received for this peer.
+ * Method called whenever a peer connects.
*
- * @param cls NULL
- * @param client the TokenizedMessageContext which contains message information
- * @param message the actual message
+ * @param cls closure
+ * @param peer peer identity this notification is about
*/
-int
-tokenized_message_handler (void *cls, void *client,
- const struct GNUNET_MessageHeader *message)
+static void
+handle_core_connect (void *cls,
+ const struct GNUNET_PeerIdentity *peer)
{
- struct TokenizedMessageContext *ctx = client;
+ struct DirectNeighbor *neighbor;
- 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))
+ /* 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_MESSAGES
+ GNUNET_break (GNUNET_YES != neighbor->connected);
+ neighbor->connected = GNUNET_YES;
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);
+ "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;
}
- return GNUNET_OK;
+ 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 */
}
-#if DELAY_FORWARDS
-struct DelayedMessageContext
-{
- struct GNUNET_PeerIdentity dest;
- struct GNUNET_PeerIdentity sender;
- struct GNUNET_MessageHeader *message;
- size_t message_size;
- uint32_t uid;
-};
-
-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_UNIT_FOREVER_REL);
- GNUNET_free (msg_ctx->message);
- GNUNET_free (msg_ctx);
- }
-}
-#endif
/**
- * Find latency information in 'atsi'.
+ * Called for each 'target' in a neighbor table to free the associated memory.
*
- * @param atsi performance data
- * @param atsi_count number of entries in atsi
- * @return connection latency
+ * @param cls NULL
+ * @param key key of the value
+ * @param value value to free
+ * @return GNUNET_OK to continue to iterate
*/
-static struct GNUNET_TIME_Relative
-get_atsi_latency (const struct GNUNET_ATS_Information *atsi,
- unsigned int atsi_count)
+static int
+free_targets (void *cls,
+ const struct GNUNET_PeerIdentity *key,
+ void *value)
{
- unsigned int i;
-
- for (i = 0; i < atsi_count; i++)
- if (ntohl (atsi[i].type) == GNUNET_ATS_QUALITY_NET_DELAY)
- return GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
- ntohl (atsi->value));
- GNUNET_break (0);
- /* how can we not have latency data? */
- return GNUNET_TIME_UNIT_SECONDS;
+ GNUNET_free (value);
+ return GNUNET_OK;
}
-#if DEBUG_DV
/**
- * Iterator over hash map entries.
+ * Multipeerhmap iterator for checking if a given route is
+ * (now) useful to this peer.
*
- * @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 struct GNUNET_HashCode * key, void *abs_value)
-{
- struct DistantNeighbor *distant_neighbor = abs_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.
+ * @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
*/
-static void
-neighbor_send_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+static int
+check_possible_route (void *cls,
+ const struct GNUNET_PeerIdentity *key,
+ void *value)
{
- 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) != 0)
- {
-#if DEBUG_DV_GOSSIP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Called with reason shutdown, shutting down!\n",
- GNUNET_i2s (&my_identity));
-#endif
- 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_UNIT_FOREVER_REL;
- 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_EccPublicKeyBinaryEncoded));
- 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 (try_core_send, NULL);
- /*if (core_transmit_handle == NULL)
- * core_transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, GNUNET_YES, default_dv_priority, GNUNET_TIME_UNIT_FOREVER_REL, &to->identity, sizeof(p2p_dv_MESSAGE_NeighborInfo), &core_transmit_notify, NULL); */
-
- }
+ struct DirectNeighbor *neighbor = cls;
+ struct Target *target = value;
+ struct Route *route;
- 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 (&neighbor_send_task, send_context);
- }
- else
+ route = GNUNET_CONTAINER_multipeermap_get (all_routes,
+ key);
+ if (NULL != route)
{
-#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 (GNUNET_DV_DEFAULT_SEND_INTERVAL,
- &neighbor_send_task, send_context);
+ if (ntohl (route->target.distance) > ntohl (target->distance) + 1)
+ {
+ /* 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 */
}
-
- return;
+ 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;
}
-
-#if UNSIMPLER
/**
- * Iterate over hash map entries for a distant neighbor,
- * if direct neighbor matches context call send message
+ * Multipeermap iterator for finding routes that were previously
+ * "hidden" due to a better route (called after a disconnect event).
*
- * @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 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
*/
-int
-send_iterator (void *cls, const struct GNUNET_HashCode * key, void *abs_value)
+static int
+refresh_routes (void *cls,
+ const struct GNUNET_PeerIdentity *key,
+ void *value)
{
- struct DV_SendContext *send_context = cls;
- struct DistantNeighbor *distant_neighbor = abs_value;
+ struct DirectNeighbor *neighbor = value;
- if (memcmp (distant_neighbor->referrer, send_context->direct_peer, sizeof (struct GNUNET_PeerIdentity)) == 0) /* They match, send and free */
- {
- send_message_via (&my_identity, distant_neighbor, send_context);
- return GNUNET_NO;
- }
+ 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;
}
-#endif
-
-
-/** Forward declarations **/
-static int
-handle_dv_gossip_message (void *cls, const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_MessageHeader *message,
- const struct GNUNET_ATS_Information *atsi,
- unsigned int atsi_count);
-
-static int
-handle_dv_disconnect_message (void *cls, const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_MessageHeader *message,
- const struct GNUNET_ATS_Information *atsi,
- unsigned int atsi_count);
-/** End forward declarations **/
/**
- * Free a DistantNeighbor node, including removing it
- * from the referer's list.
+ * Get distance information from 'atsi'.
+ *
+ * @param atsi performance data
+ * @param atsi_count number of entries in atsi
+ * @return connected transport distance
*/
-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 (referee->max_loc);
- GNUNET_CONTAINER_heap_remove_node (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 (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 struct GNUNET_HashCode * key,
- void *value)
+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_UNIT_FOREVER_REL;
- 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 (try_core_send, NULL);
- /*if (core_transmit_handle == NULL)
- * core_transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, GNUNET_YES, default_dv_priority, GNUNET_TIME_UNIT_FOREVER_REL, ¬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;
}
-#if PKEY_NO_NEIGHBOR_ON_ADD
/**
- * Iterator over hash map entries.
+ * Handle the case that a direct connection to a peer is
+ * disrupted. Remove all routes via that peer and
+ * stop the consensus with it.
*
- * @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 neighbor peer that was disconnected (or at least is no
+ * longer at distance 1)
*/
-static int
-add_pkey_to_extended (void *cls, const struct GNUNET_HashCode * key, void *abs_value)
+static void
+handle_direct_disconnect (struct DirectNeighbor *neighbor)
{
- struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded *pkey = cls;
- struct DistantNeighbor *distant_neighbor = abs_value;
-
- if (distant_neighbor->pkey == NULL)
+ 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)
{
- distant_neighbor->pkey =
- GNUNET_malloc (sizeof (struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded));
- memcpy (distant_neighbor->pkey, pkey,
- sizeof (struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded));
+ 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;
}
-
- return GNUNET_YES;
}
-#endif
+
/**
- * Iterator over hash map entries.
+ * Function that is called with QoS information about an address; used
+ * to update our current distance to another peer.
*
* @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 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 int
-update_matching_neighbors (void *cls, const struct GNUNET_HashCode * key, void *value)
+static void
+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 NeighborUpdateInfo *update_info = cls;
- struct DistantNeighbor *distant_neighbor = value;
+ struct DirectNeighbor *neighbor;
+ uint32_t distance;
- if (update_info->referrer == distant_neighbor->referrer) /* Direct neighbor matches, update it's info and return GNUNET_NO */
+ 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)
{
- /* 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;
+ if ( (DIRECT_NEIGHBOR_COST == neighbor->distance) &&
+ (DIRECT_NEIGHBOR_COST == distance) )
+ return; /* no change */
+ if (DIRECT_NEIGHBOR_COST == neighbor->distance)
+ {
+ 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;
+ }
+ neighbor->distance = distance;
+ if (DIRECT_NEIGHBOR_COST != neighbor->distance)
+ return;
+ if (GNUNET_YES != neighbor->connected)
+ return;
+ handle_direct_connect (neighbor);
+ return;
}
-
- return GNUNET_YES;
+ 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;
}
/**
- * 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!
+ * 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 the newly connected neighbor we will gossip about
- * @param key the hashcode of the peer
- * @param value the direct neighbor we should gossip to
- *
- * @return GNUNET_YES to continue iteration, GNUNET_NO otherwise
+ * @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_distant_all_direct_neighbors (void *cls, const struct GNUNET_HashCode * key,
- void *value)
+check_target_removed (void *cls,
+ const struct GNUNET_PeerIdentity *key,
+ void *value)
{
- 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)
- {
- return GNUNET_YES;
- }
+ struct DirectNeighbor *neighbor = cls;
+ struct Target *new_target;
+ struct Route *current_route;
- if (memcmp
- (&direct->identity, &distant->identity,
- sizeof (struct GNUNET_PeerIdentity)) == 0)
+ new_target = GNUNET_CONTAINER_multipeermap_get (neighbor->neighbor_table_consensus,
+ key);
+ if (NULL == new_target)
{
- return GNUNET_YES; /* Don't gossip to a peer about itself! */
+ /* 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;
}
-
-#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(send_context->task); */
-
- send_context->task =
- GNUNET_SCHEDULER_add_now (&neighbor_send_task, send_context);
- return GNUNET_YES;
-}
-
-/**
- * Callback for hello address creation.
- *
- * @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.
- */
-static size_t
-generate_hello_address (void *cls, size_t max, void *buf)
-{
- struct HelloContext *hello_context = cls;
- struct GNUNET_HELLO_Address hello_address;
- char *addr_buffer;
- size_t offset;
- size_t size;
- size_t ret;
-
- 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));
- memset (&hello_address.peer, 0, sizeof (struct GNUNET_PeerIdentity));
- hello_address.address = addr_buffer;
- hello_address.transport_name = "dv";
- hello_address.address_length = size;
- ret =
- GNUNET_HELLO_add_address (&hello_address,
- GNUNET_TIME_relative_to_absolute
- (GNUNET_TIME_UNIT_HOURS), buf, max);
-
- hello_context->addresses_to_add--;
-
- GNUNET_free (addr_buffer);
- return ret;
+ return GNUNET_OK;
}
/**
- * 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'
+ * 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.
*
- * @return the added neighbor, the updated neighbor or NULL (neighbor
- * not added)
+ * @param cls the 'struct DirectNeighbor'
+ * @param key peer identity for the target
+ * @param value a 'struct Target' now reachable via the given neighbor
*/
-static struct DistantNeighbor *
-addUpdateNeighbor (const struct GNUNET_PeerIdentity *peer,
- struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded *pkey,
- unsigned int referrer_peer_id,
- struct DirectNeighbor *referrer, unsigned int cost)
+static int
+check_target_added (void *cls,
+ const struct GNUNET_PeerIdentity *key,
+ void *value)
{
- 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
- }
+ struct DirectNeighbor *neighbor = cls;
+ struct Target *target = value;
+ struct Route *current_route;
- /* 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))
+ /* target was revoked, check if it was used */
+ current_route = GNUNET_CONTAINER_multipeermap_get (all_routes,
+ key);
+ if (NULL != current_route)
{
-#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_EccPublicKeyBinaryEncoded));
- memcpy (neighbor->pkey, pkey,
- sizeof (struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded));
- }
- 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)
+ /* route exists */
+ if (current_route->next_hop == neighbor)
{
- for (i = 0; i < MAX_OUTSTANDING_MESSAGES; i++)
+ /* we had the same route before, no change */
+ if (ntohl (target->distance) + 1 != ntohl (current_route->target.distance))
{
- 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
- struct GNUNET_ATS_Information atsi[2];
-
- atsi[0].type = htonl (GNUNET_ATS_QUALITY_NET_DISTANCE);
- atsi[0].value = htonl (referrer->pending_messages[i].distance);
- atsi[1].type = htonl (GNUNET_ATS_QUALITY_NET_DELAY);
- atsi[1].value =
- htonl ((uint32_t) referrer->pending_messages[i].
- latency.rel_value);
- handle_dv_data_message (NULL, &referrer->pending_messages[i].sender,
- referrer->pending_messages[i].message, atsi,
- 2);
- GNUNET_free (referrer->pending_messages[i].message);
- referrer->pending_messages[i].sender_id = 0;
- }
+ current_route->target.distance = htonl (ntohl (target->distance) + 1);
+ send_distance_change_to_plugin (&target->peer, ntohl (target->distance) + 1);
}
+ return GNUNET_OK;
}
- if ((cost != DIRECT_NEIGHBOR_COST) && (neighbor->pkey != NULL))
+ if (ntohl (current_route->target.distance) >= ntohl (target->distance) + 1)
{
- /* 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);
+ /* alternative, shorter route exists, ignore */
+ return GNUNET_OK;
}
-
- }
- 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
+ /* 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;
}
-#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;
+ /* 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;
}
/**
- * 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.
+ * 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.
*
- * @param cls closure
- * @param peer peer which sent the message (immediate sender)
- * @param message the message
- * @param atsi performance data
- * @param atsi_count number of entries in atsi
+ * @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
-handle_dv_disconnect_message (void *cls, const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_MessageHeader *message,
- const struct GNUNET_ATS_Information *atsi,
- unsigned int atsi_count)
+static void
+handle_set_union_result (void *cls,
+ const struct GNUNET_SET_Element *element,
+ enum GNUNET_SET_Status status)
{
- struct DirectNeighbor *referrer;
- struct DistantNeighbor *distant;
- p2p_dv_MESSAGE_Disconnect *enc_message =
- (p2p_dv_MESSAGE_Disconnect *) message;
-
- if (ntohs (message->size) < sizeof (p2p_dv_MESSAGE_Disconnect))
- {
- return GNUNET_SYSERR; /* invalid message */
- }
-
- referrer =
- GNUNET_CONTAINER_multihashmap_get (direct_neighbors, &peer->hashPubKey);
- if (referrer == NULL)
- return GNUNET_OK;
+ struct DirectNeighbor *neighbor = cls;
+ struct Target *target;
- distant = referrer->referee_head;
- while (distant != NULL)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Got SET union result: %d\n",
+ status);
+ switch (status)
{
- if (distant->referrer_id == ntohl (enc_message->peer_id))
+ case GNUNET_SET_STATUS_OK:
+ if (sizeof (struct Target) != element->size)
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+ 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))
+ {
+ GNUNET_break_op (0);
+ GNUNET_free (target);
+ }
+ 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)
{
- distant_neighbor_free (distant);
- distant = referrer->referee_head;
+ GNUNET_CONTAINER_multipeermap_iterate (neighbor->neighbor_table_consensus,
+ &free_targets,
+ NULL);
+ GNUNET_CONTAINER_multipeermap_destroy (neighbor->neighbor_table_consensus);
+ neighbor->neighbor_table_consensus = NULL;
}
- else
- distant = distant->next;
+ 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;
}
-
- return 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!
+ * Start creating a new DV set union construction, our neighbour has
+ * asked for it (callback for listening peer).
*
- * @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
- *
- * @return GNUNET_YES to continue iteration, GNUNET_NO otherwise
+ * @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 int
-add_all_extended_peers (void *cls, const struct GNUNET_HashCode * key, void *value)
+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 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);
-
- return GNUNET_YES;
-}
-
+ struct DirectNeighbor *neighbor = cls;
-/**
- * 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!
- *
- * @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
- *
- * @return GNUNET_YES to continue iteration, GNUNET_NO otherwise
- */
-static int
-add_all_direct_neighbors (void *cls, const struct GNUNET_HashCode * 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)
+ 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)
{
- return GNUNET_YES;
+ GNUNET_SET_operation_cancel (neighbor->set_op);
+ neighbor->set_op = NULL;
}
-
- if (memcmp
- (&direct->identity, &to->identity,
- sizeof (struct GNUNET_PeerIdentity)) == 0)
+ if (NULL != neighbor->my_set)
{
- return GNUNET_YES; /* Don't gossip to a peer about itself! */
+ GNUNET_SET_destroy (neighbor->my_set);
+ neighbor->my_set = NULL;
}
-
-#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 (send_context->task);
-
- send_context->task =
- GNUNET_SCHEDULER_add_now (&neighbor_send_task, send_context);
- //tc.reason = GNUNET_SCHEDULER_REASON_TIMEOUT;
- //neighbor_send_task(send_context, &tc);
- return GNUNET_YES;
+ 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);
}
-////////////////////////////////////////////////////////////////////////
-#endif
-
-
-
/**
- * Method called whenever a peer connects.
+ * Start creating a new DV set union by initiating the connection.
*
- * @param cls closure
- * @param peer peer identity this notification is about
- * @param atsi performance data
- * @param atsi_count number of entries in atsi
+ * @param cls the 'struct DirectNeighbor' of the peer we're building
+ * a routing consensus with
+ * @param tc scheduler context
*/
static void
-handle_core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_ATS_Information *atsi,
- unsigned int atsi_count)
+initiate_set_union (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- struct DirectNeighbor *neighbor;
- uint32_t distance;
-
- /* Check for connect to self message */
- if (0 == memcmp (&my_identity, peer, sizeof (struct GNUNET_PeerIdentity)))
- return;
- distance = get_atsi_distance (atsi, atsi_count);
- neighbor = GNUNET_CONTAINER_multihashmap_get (direct_neighbors,
- &peer->hashPubKey);
- if (NULL != neighbor)
- {
- GNUNET_break (0);
- return;
- }
- if (DIRECT_NEIGHBOR_COST != distance)
- return; /* is a DV-neighbor */
+ struct DirectNeighbor *neighbor = cls;
- GNUNET_break (0); // FIXME...
+ 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 data messages. Whatever this message
+ * 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 atsi transport ATS information (latency, distance, etc.)
- * @param atsi_count number of entries in atsi
+ * @return GNUNET_OK on success, GNUNET_SYSERR if the other peer violated the protocol
*/
static int
handle_dv_route_message (void *cls, const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_MessageHeader *message,
- const struct GNUNET_ATS_Information *atsi,
- unsigned int atsi_count)
+ const struct GNUNET_MessageHeader *message)
{
- GNUNET_break (0); // FIXME
- return GNUNET_OK;
+ const struct RouteMessage *rm;
+ const struct GNUNET_MessageHeader *payload;
+ struct Route *route;
+
+ 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)
+ {
+ /* don't have reverse route, drop */
+ GNUNET_STATISTICS_update (stats,
+ "# message discarded (no reverse route)",
+ 1, GNUNET_NO);
+ return GNUNET_OK;
+ }
+ 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;
+ }
+ 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;
}
handle_dv_send_message (void *cls, struct GNUNET_SERVER_Client *client,
const struct GNUNET_MessageHeader *message)
{
- GNUNET_break (0); // FIXME
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
-}
-
+ struct Route *route;
+ const struct GNUNET_DV_SendMessage *msg;
+ const struct GNUNET_MessageHeader *payload;
-/**
- * Multihashmap iterator for freeing routes that go via a particular
- * neighbor that disconnected and is thus no longer available.
- *
- * @param cls the direct neighbor that is now unavailable
- * @param key key value stored under
- * @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
-cull_routes (void *cls, const struct GNUNET_HashCode * key, void *value)
-{
- struct DirectNeighbor *neighbor = cls;
- struct Route *route = value;
-
- if (route->next_hop != neighbor)
- return GNUNET_YES; /* not affected */
-
- /* FIXME: destroy route! */
- GNUNET_break (0);
-
- return GNUNET_YES;
+ 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,
+ "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);
}
/**
- * Multihashmap iterator for freeing routes that go via a particular
- * neighbor that disconnected and is thus no longer available.
+ * Cleanup all of the data structures associated with a given neighbor.
*
- * @param cls the direct neighbor that is now unavailable
- * @param key key value stored under
- * @param value a 'struct Route' that may or may not go via neighbor
- *
- * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
+ * @param neighbor neighbor to clean up
*/
-static int
-cull_routing_neighbors (void *cls, const struct GNUNET_HashCode * key, void *value)
+static void
+cleanup_neighbor (struct DirectNeighbor *neighbor)
{
- struct DirectNeighbor *neighbor = cls;
- struct RoutingNeighbor *rn = value;
-
- if (rn->route.next_hop != neighbor)
- return GNUNET_YES; /* not affected */
-
- /* FIXME: destroy routing neighbor! */
- GNUNET_break (0);
+ 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);
}
handle_core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
{
struct DirectNeighbor *neighbor;
- struct PendingMessage *pending;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Received core peer disconnect message for peer `%s'!\n",
if (0 == memcmp (&my_identity, peer, sizeof (struct GNUNET_PeerIdentity)))
return;
neighbor =
- GNUNET_CONTAINER_multihashmap_get (direct_neighbors, &peer->hashPubKey);
+ GNUNET_CONTAINER_multipeermap_get (direct_neighbors, peer);
if (NULL == neighbor)
{
- /* must have been a DV-neighbor, ignore */
+ GNUNET_break (0);
return;
}
- while (NULL != (pending = neighbor->pm_head))
+ GNUNET_break (GNUNET_YES == neighbor->connected);
+ neighbor->connected = GNUNET_NO;
+ if (DIRECT_NEIGHBOR_COST == neighbor->distance)
{
- GNUNET_CONTAINER_DLL_remove (neighbor->pm_head,
- neighbor->pm_tail,
- pending);
- GNUNET_free (pending);
- }
- GNUNET_CONTAINER_multihashmap_iterate (all_routes,
- &cull_routes,
- neighbor);
- GNUNET_CONTAINER_multihashmap_iterate (routing_neighbors,
- &cull_routing_neighbors,
- neighbor);
- if (NULL != neighbor->cth)
- {
- GNUNET_CORE_notify_transmit_ready_cancel (neighbor->cth);
- neighbor->cth = NULL;
+ GNUNET_STATISTICS_update (stats,
+ "# peers connected (1-hop)",
+ -1, GNUNET_NO);
}
- GNUNET_assert (GNUNET_YES ==
- GNUNET_CONTAINER_multihashmap_remove (direct_neighbors,
- &peer->hashPubKey,
- neighbor));
- GNUNET_free (neighbor);
+ cleanup_neighbor (neighbor);
+ GNUNET_CONTAINER_multipeermap_iterate (direct_neighbors,
+ &refresh_routes,
+ NULL);
}
-
/**
- * Multihashmap iterator for freeing routes. Should never be called.
+ * Multipeermap iterator for freeing routes. Should never be called.
*
* @param cls NULL
* @param key key value stored under
* @return GNUNET_YES to continue iteration, GNUNET_NO to stop
*/
static int
-free_route (void *cls, const struct GNUNET_HashCode * key, void *value)
+free_route (void *cls, const struct GNUNET_PeerIdentity * key, void *value)
{
- GNUNET_break (0);
- // FIXME: notify client about disconnect
- return GNUNET_YES;
-}
-
-
-/**
- * Multihashmap iterator for freeing routing neighbors. Should never be called.
- *
- * @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_routing_neighbors (void *cls, const struct GNUNET_HashCode * key, void *value)
-{
- struct RoutingNeighbor *router = value;
+ struct Route *route = value;
- GNUNET_break (0);
- // FIXME: release resources
+ 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;
}
/**
- * Multihashmap iterator for freeing direct neighbors. Should never be called.
+ * Multipeermap iterator for freeing direct neighbors. Should never be called.
*
* @param cls NULL
* @param key key value stored under
* @return GNUNET_YES to continue iteration, GNUNET_NO to stop
*/
static int
-free_direct_neighbors (void *cls, const struct GNUNET_HashCode * key, void *value)
+free_direct_neighbors (void *cls, const struct GNUNET_PeerIdentity * key, void *value)
{
- struct DirectNeighbor *dn = value;
+ struct DirectNeighbor *neighbor = value;
GNUNET_break (0);
- // FIXME: release resources, ...
+ cleanup_neighbor (neighbor);
return GNUNET_YES;
}
static void
shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- struct PendingMessage *pending;
unsigned int i;
- GNUNET_CONTAINER_multihashmap_iterate (direct_neighbors,
- &free_direct_neighbors, NULL);
- GNUNET_CONTAINER_multihashmap_destroy (direct_neighbors);
- GNUNET_CONTAINER_multihashmap_iterate (routing_neighbors,
- &free_routing_neighbors, NULL);
- GNUNET_CONTAINER_multihashmap_destroy (routing_neighbors);
- GNUNET_CONTAINER_multihashmap_iterate (all_routes,
- &free_route, NULL);
- GNUNET_CONTAINER_multihashmap_destroy (all_routes);
GNUNET_CORE_disconnect (core_api);
core_api = NULL;
- while (NULL != (pending = plugin_pending_head))
- {
- GNUNET_CONTAINER_DLL_remove (plugin_pending_head,
- plugin_pending_tail,
- pending);
- GNUNET_free (pending);
- }
+ 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,
}
+/**
+ * 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;
+}
+
+
/**
* Handle START-message. This is the first message sent to us
* by the client (can only be one!).
handle_start (void *cls, struct GNUNET_SERVER_Client *client,
const struct GNUNET_MessageHeader *message)
{
- if (NULL != client_handle)
- {
- /* forcefully drop old client */
- GNUNET_SERVER_client_disconnect (client_handle);
- GNUNET_SERVER_client_drop (client_handle);
- }
- client_handle = client;
- GNUNET_SERVER_client_keep (client_handle);
+ GNUNET_SERVER_notification_context_add (nc, client);
GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ GNUNET_CONTAINER_multipeermap_iterate (all_routes,
+ &add_route,
+ client);
}
* Called on core init.
*
* @param cls unused
- * @param server legacy
* @param identity this peer's identity
*/
static void
-core_init (void *cls, struct GNUNET_CORE_Handle *server,
+core_init (void *cls,
const struct GNUNET_PeerIdentity *identity)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
{NULL, 0, 0}
};
static struct GNUNET_SERVER_MessageHandler plugin_handlers[] = {
- {&handle_start, NULL,
- GNUNET_MESSAGE_TYPE_DV_START,
+ {&handle_start, NULL,
+ GNUNET_MESSAGE_TYPE_DV_START,
sizeof (struct GNUNET_MessageHeader) },
- { &handle_dv_send_message, NULL,
- GNUNET_MESSAGE_TYPE_TRANSPORT_DV_SEND,
+ { &handle_dv_send_message, NULL,
+ GNUNET_MESSAGE_TYPE_DV_SEND,
0},
{NULL, NULL, 0, 0}
};
cfg = c;
- direct_neighbors = GNUNET_CONTAINER_multihashmap_create (128, GNUNET_NO);
- routing_neighbors = GNUNET_CONTAINER_multihashmap_create (128 * 128, GNUNET_NO);
- all_routes = GNUNET_CONTAINER_multihashmap_create (65536, GNUNET_NO);
+ 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,
+ &core_init,
&handle_core_connect,
&handle_core_disconnect,
- NULL, GNUNET_NO,
- NULL, GNUNET_NO,
+ NULL, GNUNET_NO,
+ NULL, GNUNET_NO,
core_handlers);
if (NULL == core_api)
return;
- // FIXME: stats
+ 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);
GNUNET_SERVICE_run (argc, argv, "dv", GNUNET_SERVICE_OPTION_NONE,
&run, NULL)) ? 0 : 1;
}
+
+/* end of gnunet-service-dv.c */