* @author Christian Grothoff
* @author Nathan Evans
*
+ * TODO: The gossip rates need to be worked out. Probably many other things
+ * as well.
+ *
*/
#include "platform.h"
#include "gnunet_client_lib.h"
#include "gnunet_service_lib.h"
#include "gnunet_core_service.h"
#include "gnunet_signal_lib.h"
+#include "gnunet_util_lib.h"
+#include "gnunet_hello_lib.h"
+#include "gnunet_peerinfo_service.h"
+#include "gnunet_crypto_lib.h"
#include "dv.h"
/**
- * DV Service Context stuff goes here...
+ * For testing mostly, remember only the
+ * shortest path to a distant neighbor.
+ */
+#define AT_MOST_ONE GNUNET_NO
+
+#define USE_PEER_ID GNUNET_YES
+
+/**
+ * How often do we check about sending out more peer information (if
+ * we are connected to no peers previously).
+ */
+#define GNUNET_DV_DEFAULT_SEND_INTERVAL GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS, 500000)
+
+/**
+ * How long do we wait at most between sending out information?
+ */
+#define GNUNET_DV_MAX_SEND_INTERVAL GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS, 500000)
+
+/**
+ * How long can we have not heard from a peer and
+ * still have it in our tables?
+ */
+#define GNUNET_DV_PEER_EXPIRATION_TIME GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 1000))
+
+/**
+ * Priority for gossip.
+ */
+#define GNUNET_DV_DHT_GOSSIP_PRIORITY (GNUNET_EXTREME_PRIORITY / 10)
+
+/**
+ * How often should we check if expiration time has elapsed for
+ * some peer?
+ */
+#define GNUNET_DV_MAINTAIN_FREQUENCY GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 5))
+
+/**
+ * How long to allow a message to be delayed?
+ */
+#define DV_DELAY GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 5))
+
+/**
+ * Priority to use for DV data messages.
+ */
+#define DV_PRIORITY 0
+
+/**
+ * The cost to a direct neighbor. We used to use 0, but 1 makes more sense.
+ */
+#define DIRECT_NEIGHBOR_COST 1
+
+/**
+ * The default number of direct connections to store in DV (max)
+ */
+#define DEFAULT_DIRECT_CONNECTIONS 50
+
+/**
+ * The default size of direct + extended peers in DV (max)
+ */
+#define DEFAULT_DV_SIZE 100
+
+/**
+ * The default fisheye depth, from how many hops away will
+ * we keep peers?
+ */
+#define DEFAULT_FISHEYE_DEPTH 4
+
+/**
+ * Linked list of messages to send to clients.
+ */
+struct PendingMessage
+{
+ /**
+ * Pointer to next item in the list
+ */
+ struct PendingMessage *next;
+
+ /**
+ * Pointer to previous item in the list
+ */
+ struct PendingMessage *prev;
+
+ /**
+ * The PeerIdentity to send to
+ */
+ struct GNUNET_PeerIdentity recipient;
+
+ /**
+ * The result of message sending.
+ */
+ struct GNUNET_DV_SendResultMessage *send_result;
+
+ /**
+ * Message importance level.
+ */
+ unsigned int importance;
+
+ /**
+ * Size of message.
+ */
+ unsigned int msg_size;
+
+ /**
+ * How long to wait before sending message.
+ */
+ struct GNUNET_TIME_Relative timeout;
+
+ /**
+ * Actual message to be sent; // avoid allocation
+ */
+ const struct GNUNET_MessageHeader *msg; // msg = (cast) &pm[1]; // memcpy (&pm[1], data, len);
+
+};
+
+struct FastGossipNeighborList
+{
+ /**
+ * Next element of DLL
+ */
+ struct FastGossipNeighborList *next;
+
+ /**
+ * Prev element of DLL
+ */
+ struct FastGossipNeighborList *prev;
+
+ /**
+ * The neighbor to gossip about
+ */
+ struct DistantNeighbor *about;
+};
+
+/**
+ * Context created whenever a direct peer connects to us,
+ * used to gossip other peers to it.
+ */
+struct NeighborSendContext
+{
+ /**
+ * The peer we will gossip to.
+ */
+ struct DirectNeighbor *toNeighbor;
+
+ /**
+ * The task associated with this context.
+ */
+ GNUNET_SCHEDULER_TaskIdentifier task;
+
+ /**
+ * Head of DLL of peers to gossip about
+ * as fast as possible to this peer, for initial
+ * set up.
+ */
+ struct FastGossipNeighborList *fast_gossip_list_head;
+
+ /**
+ * Tail of DLL of peers to gossip about
+ * as fast as possible to this peer, for initial
+ * set up.
+ */
+ struct FastGossipNeighborList *fast_gossip_list_tail;
+
+};
+
+
+/**
+ * Struct to hold information for updating existing neighbors
+ */
+struct NeighborUpdateInfo
+{
+ /**
+ * Cost
+ */
+ unsigned int cost;
+
+ /**
+ * The existing neighbor
+ */
+ struct DistantNeighbor *neighbor;
+
+ /**
+ * The referrer of the possibly existing peer
+ */
+ struct DirectNeighbor *referrer;
+
+ /**
+ * The time we heard about this peer
+ */
+ struct GNUNET_TIME_Absolute now;
+
+ /**
+ * Peer id this peer uses to refer to neighbor.
+ */
+ unsigned int referrer_peer_id;
+
+};
+
+/**
+ * Struct where actual neighbor information is stored,
+ * referenced by min_heap and max_heap. Freeing dealt
+ * with when items removed from hashmap.
+ */
+struct DirectNeighbor
+{
+ /**
+ * Identity of neighbor.
+ */
+ struct GNUNET_PeerIdentity identity;
+
+ /**
+ * PublicKey of neighbor.
+ */
+ struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pkey;
+
+ /**
+ * Head of DLL of nodes that this direct neighbor referred to us.
+ */
+ struct DistantNeighbor *referee_head;
+
+ /**
+ * Tail of DLL of nodes that this direct neighbor referred to us.
+ */
+ struct DistantNeighbor *referee_tail;
+
+ /**
+ * The sending context for gossiping peers to this neighbor.
+ */
+ struct NeighborSendContext *send_context;
+
+ /**
+ * Is this one of the direct neighbors that we are "hiding"
+ * from DV?
+ */
+ int hidden;
+};
+
+
+/**
+ * Struct where actual neighbor information is stored,
+ * referenced by min_heap and max_heap. Freeing dealt
+ * with when items removed from hashmap.
+ */
+struct DistantNeighbor
+{
+ /**
+ * We keep distant neighbor's of the same referrer in a DLL.
+ */
+ struct DistantNeighbor *next;
+
+ /**
+ * We keep distant neighbor's of the same referrer in a DLL.
+ */
+ struct DistantNeighbor *prev;
+
+ /**
+ * Node in min heap
+ */
+ struct GNUNET_CONTAINER_HeapNode *min_loc;
+
+ /**
+ * Node in max heap
+ */
+ struct GNUNET_CONTAINER_HeapNode *max_loc;
+
+ /**
+ * Identity of referrer (next hop towards 'neighbor').
+ */
+ struct DirectNeighbor *referrer;
+
+ /**
+ * Identity of neighbor.
+ */
+ struct GNUNET_PeerIdentity identity;
+
+ /**
+ * PublicKey of neighbor.
+ */
+ struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pkey;
+
+ /**
+ * Last time we received routing information from this peer
+ */
+ struct GNUNET_TIME_Absolute last_activity;
+
+ /**
+ * Cost to neighbor, used for actual distance vector computations
+ */
+ unsigned int cost;
+
+ /**
+ * Random identifier *we* use for this peer, to be used as shortcut
+ * instead of sending full peer id for each message
+ */
+ unsigned int our_id;
+
+ /**
+ * Random identifier the *referrer* uses for this peer.
+ */
+ unsigned int referrer_id;
+
+ /**
+ * Is this one of the direct neighbors that we are "hiding"
+ * from DV?
+ */
+ int hidden;
+
+};
+
+struct PeerIteratorContext
+{
+ /**
+ * The actual context, to be freed later.
+ */
+ struct GNUNET_PEERINFO_IteratorContext *ic;
+
+ /**
+ * The neighbor about which we are concerned.
+ */
+ struct DirectNeighbor *neighbor;
+
+ /**
+ * The distant neighbor entry for this direct neighbor.
+ */
+ struct DistantNeighbor *distant;
+
+};
+
+/**
+ * Context used for creating hello messages when
+ * gossips are received.
+ */
+struct HelloContext
+{
+ /**
+ * Identity of distant neighbor.
+ */
+ struct GNUNET_PeerIdentity distant_peer;
+
+ /**
+ * Identity of direct neighbor, via which we send this message.
+ */
+ const struct GNUNET_PeerIdentity *direct_peer;
+
+ /**
+ * How many addresses do we need to add (always starts at 1, then set to 0)
+ */
+ int addresses_to_add;
+
+};
+
+struct DV_SendContext
+{
+ /**
+ * The distant peer (should always match)
+ */
+ struct GNUNET_PeerIdentity *distant_peer;
+
+ /**
+ * The direct peer, we need to verify the referrer of.
+ */
+ struct GNUNET_PeerIdentity *direct_peer;
+
+ /**
+ * The message to be sent
+ */
+ struct GNUNET_MessageHeader *message;
+
+ /**
+ * The pre-built send result message. Simply needs to be queued
+ * and freed once send has been called!
+ */
+ struct GNUNET_DV_SendResultMessage *send_result;
+
+ /**
+ * The size of the message being sent, may be larger
+ * than message->header.size because it's multiple
+ * messages packed into one!
+ */
+ size_t message_size;
+
+ /**
+ * How important is this message?
+ */
+ unsigned int importance;
+
+ /**
+ * Timeout for this message
+ */
+ struct GNUNET_TIME_Relative timeout;
+
+ /**
+ * Unique ID for DV message
+ */
+ unsigned int uid;
+};
+
+struct FindDestinationContext
+{
+ unsigned int tid;
+ struct DistantNeighbor *dest;
+};
+
+struct FindIDContext
+{
+ unsigned int tid;
+ struct GNUNET_PeerIdentity *dest;
+ const struct GNUNET_PeerIdentity *via;
+};
+
+struct DisconnectContext
+{
+ /**
+ * Distant neighbor to get pid from.
+ */
+ struct DistantNeighbor *distant;
+
+ /**
+ * Direct neighbor that disconnected.
+ */
+ struct DirectNeighbor *direct;
+};
+
+struct TokenizedMessageContext
+{
+ /**
+ * Immediate sender of this message
+ */
+ const struct GNUNET_PeerIdentity *peer;
+
+ /**
+ * Distant sender of the message
+ */
+ struct DistantNeighbor *distant;
+
+ /**
+ * Uid for this set of messages
+ */
+ uint32_t uid;
+};
+
+/**
+ * Context for finding the least cost peer to send to.
+ * Transport selection can only go so far.
+ */
+struct FindLeastCostContext
+{
+ struct DistantNeighbor *target;
+ unsigned int least_cost;
+};
+
+/**
+ * Handle to the core service api.
+ */
+static struct GNUNET_CORE_Handle *coreAPI;
+
+/**
+ * Stream tokenizer to handle messages coming in from core.
+ */
+static struct GNUNET_SERVER_MessageStreamTokenizer *coreMST;
+
+/**
+ * The identity of our peer.
+ */
+static struct GNUNET_PeerIdentity my_identity;
+
+/**
+ * The configuration for this service.
+ */
+static const struct GNUNET_CONFIGURATION_Handle *cfg;
+
+/**
+ * The scheduler for this service.
+ */
+static struct GNUNET_SCHEDULER_Handle *sched;
+
+/**
+ * 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;
+
+/**
+ * Task to run when we shut down, cleaning up all our trash
+ */
+static GNUNET_SCHEDULER_TaskIdentifier cleanup_task;
+
+static size_t default_dv_priority = 0;
+
+static char *my_short_id;
+
+/**
+ * Transmit handle to the plugin.
+ */
+static struct GNUNET_CONNECTION_TransmitHandle * plugin_transmit_handle;
+
+/**
+ * Head of DLL for client messages
+ */
+static struct PendingMessage *plugin_pending_head;
+
+/**
+ * Tail of DLL for client messages
+ */
+static struct PendingMessage *plugin_pending_tail;
+
+/**
+ * Handle to the peerinfo service
+ */
+static struct GNUNET_PEERINFO_Handle *peerinfo_handle;
+
+/**
+ * Transmit handle to core service.
+ */
+static struct GNUNET_CORE_TransmitHandle * core_transmit_handle;
+
+/**
+ * Head of DLL for core messages
+ */
+static struct PendingMessage *core_pending_head;
+
+/**
+ * Tail of DLL for core messages
+ */
+static struct PendingMessage *core_pending_tail;
+
+/**
+ * Map of PeerIdentifiers to 'struct GNUNET_dv_neighbor*'s for all
+ * directly connected peers.
+ */
+static struct GNUNET_CONTAINER_MultiHashMap *direct_neighbors;
+
+/**
+ * Map of PeerIdentifiers to 'struct GNUNET_dv_neighbor*'s for
+ * peers connected via DV (extended neighborhood). Does ALSO
+ * include any peers that are in 'direct_neighbors'; for those
+ * peers, the cost will be zero and the referrer all zeros.
+ */
+static struct GNUNET_CONTAINER_MultiHashMap *extended_neighbors;
+
+/**
+ * We use the min heap (min refers to cost) to prefer
+ * gossipping about peers with small costs.
+ */
+static struct GNUNET_CONTAINER_Heap *neighbor_min_heap;
+
+/**
+ * We use the max heap (max refers to cost) for general
+ * iterations over all peers and to remove the most costly
+ * connection if we have too many.
+ */
+static struct GNUNET_CONTAINER_Heap *neighbor_max_heap;
+
+/**
+ * How far out to keep peers we learn about.
+ */
+static unsigned long long fisheye_depth;
+
+/**
+ * How many peers to store at most.
+ */
+static unsigned long long max_table_size;
+
+/**
+ * We've been given a target ID based on the random numbers that
+ * we assigned to our DV-neighborhood. Find the entry for the
+ * respective neighbor.
+ */
+static int
+find_destination (void *cls,
+ struct GNUNET_CONTAINER_HeapNode *node,
+ void *element, GNUNET_CONTAINER_HeapCostType cost)
+{
+ struct FindDestinationContext *fdc = cls;
+ struct DistantNeighbor *dn = element;
+
+ if (fdc->tid != dn->our_id)
+ return GNUNET_YES;
+ fdc->dest = dn;
+ return GNUNET_NO;
+}
+
+
+/**
+ * We've been given a target ID based on the random numbers that
+ * we assigned to our DV-neighborhood. Find the entry for the
+ * respective neighbor.
+ */
+static int
+find_specific_id (void *cls,
+ const GNUNET_HashCode *key,
+ void *value)
+{
+ struct FindIDContext *fdc = cls;
+ struct DistantNeighbor *dn = value;
+
+ if (memcmp(&dn->referrer->identity, fdc->via, sizeof(struct GNUNET_PeerIdentity)) == 0)
+ {
+ fdc->tid = dn->referrer_id;
+ return GNUNET_NO;
+ }
+ return GNUNET_YES;
+}
+
+/**
+ * Find a distant peer whose referrer_id matches what we're
+ * looking for. For looking up a peer we've gossipped about
+ * but is now disconnected. Need to do this because we don't
+ * want to remove those that may be accessible via a different
+ * route.
+ */
+static int find_distant_peer (void *cls,
+ const GNUNET_HashCode * key,
+ void *value)
+{
+ struct FindDestinationContext *fdc = cls;
+ struct DistantNeighbor *distant = value;
+
+ if (fdc->tid == distant->referrer_id)
+ {
+ fdc->dest = distant;
+ return GNUNET_NO;
+ }
+ return GNUNET_YES;
+}
+
+/**
+ * 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.
+ *
+ * @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
+ */
+size_t transmit_to_plugin (void *cls,
+ size_t size, void *buf)
+{
+ char *cbuf = buf;
+ struct PendingMessage *reply;
+ size_t off;
+ size_t msize;
+
+ if (buf == NULL)
+ {
+ /* client disconnected */
+#if DEBUG_DV
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "`%s': buffer was NULL\n", "DHT");
+#endif
+ return 0;
+ }
+ plugin_transmit_handle = NULL;
+ off = 0;
+ while ( (NULL != (reply = plugin_pending_head)) &&
+ (size >= off + (msize = ntohs (reply->msg->size))))
+ {
+#if DEBUG_DV
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "`%s' : transmit_notify (plugin) called with size %d\n", "dv service", msize);
+#endif
+ GNUNET_CONTAINER_DLL_remove (plugin_pending_head,
+ plugin_pending_tail,
+ reply);
+ memcpy (&cbuf[off], reply->msg, msize);
+ GNUNET_free (reply);
+ off += msize;
+ }
+
+ if (plugin_pending_head != NULL)
+ plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle,
+ ntohs(plugin_pending_head->msg->size),
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ &transmit_to_plugin, NULL);
+
+ return off;
+}
+
+/**
+ * Send a message to the dv plugin.
+ *
+ * @param sender the direct sender of the message
+ * @param message the message to send to the plugin
+ * (may be an encapsulated type)
+ * @param message_size the size of the message to be sent
+ * @param distant_neighbor the original sender of the message
+ * @param cost the cost to the original sender of the message
+ */
+void send_to_plugin(const struct GNUNET_PeerIdentity * sender,
+ const struct GNUNET_MessageHeader *message,
+ size_t message_size,
+ struct GNUNET_PeerIdentity *distant_neighbor,
+ size_t cost)
+{
+ struct GNUNET_DV_MessageReceived *received_msg;
+ struct PendingMessage *pending_message;
+#if DEBUG_DV
+ struct GNUNET_MessageHeader * packed_message_header;
+ struct GNUNET_HELLO_Message *hello_msg;
+ struct GNUNET_PeerIdentity hello_identity;
+#endif
+ char *sender_address;
+ size_t sender_address_len;
+ char *packed_msg_start;
+ int size;
+
+#if DEBUG_DV
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_to_plugin called with peer %s as sender\n", GNUNET_i2s(distant_neighbor));
+#endif
+
+ if (memcmp(sender, distant_neighbor, sizeof(struct GNUNET_PeerIdentity)) != 0)
+ {
+ sender_address_len = sizeof(struct GNUNET_PeerIdentity) * 2;
+ sender_address = GNUNET_malloc(sender_address_len);
+ memcpy(sender_address, distant_neighbor, sizeof(struct GNUNET_PeerIdentity));
+ memcpy(&sender_address[sizeof(struct GNUNET_PeerIdentity)], sender, sizeof(struct GNUNET_PeerIdentity));
+ }
+ else
+ {
+ sender_address_len = sizeof(struct GNUNET_PeerIdentity);
+ sender_address = GNUNET_malloc(sender_address_len);
+ memcpy(sender_address, sender, sizeof(struct GNUNET_PeerIdentity));
+ }
+
+ size = sizeof(struct GNUNET_DV_MessageReceived) + sender_address_len + message_size;
+ received_msg = GNUNET_malloc(size);
+ received_msg->header.size = htons(size);
+ received_msg->header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_DV_RECEIVE);
+ received_msg->sender_address_len = htonl(sender_address_len);
+ received_msg->distance = htonl(cost);
+ received_msg->msg_len = htonl(message_size);
+ /* Set the sender in this message to be the original sender! */
+ memcpy(&received_msg->sender, distant_neighbor, sizeof(struct GNUNET_PeerIdentity));
+ /* Copy the intermediate sender to the end of the message, this is how the transport identifies this peer */
+ memcpy(&received_msg[1], sender_address, sender_address_len);
+ GNUNET_free(sender_address);
+ /* Copy the actual message after the sender */
+ packed_msg_start = (char *)&received_msg[1];
+ packed_msg_start = &packed_msg_start[sender_address_len];
+ memcpy(packed_msg_start, message, message_size);
+#if DEBUG_DV
+ packed_message_header = (struct GNUNET_MessageHeader *)packed_msg_start;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "dv service created received message. sender_address_len %lu, packed message len %d, total len %d\n", sender_address_len, ntohl(received_msg->msg_len), ntohs(received_msg->header.size));
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "dv packed message len %d, type %d\n", ntohs(packed_message_header->size), ntohs(packed_message_header->type));
+ if (ntohs(packed_message_header->type) == GNUNET_MESSAGE_TYPE_HELLO)
+ {
+ hello_msg = (struct GNUNET_HELLO_Message *)packed_message_header;
+ GNUNET_assert(GNUNET_OK == GNUNET_HELLO_get_id(hello_msg, &hello_identity));
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Packed HELLO message is about peer %s\n", GNUNET_i2s(&hello_identity));
+ }
+#endif
+ pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + size);
+ pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
+ memcpy(&pending_message[1], received_msg, size);
+ GNUNET_free(received_msg);
+
+ GNUNET_CONTAINER_DLL_insert_after(plugin_pending_head, plugin_pending_tail, plugin_pending_tail, pending_message);
+
+ if (client_handle != NULL)
+ {
+ if (plugin_transmit_handle == NULL)
+ {
+ plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle,
+ size, GNUNET_TIME_UNIT_FOREVER_REL,
+ &transmit_to_plugin, NULL);
+ }
+#if DEBUG_DV
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Failed to queue message for plugin, must be one in progress already!!\n");
+ }
+#endif
+ }
+}
+
+
+/**
+ * Function called to notify a client about the socket
+ * being ready to queue more data. "buf" will be
+ * NULL and "size" zero if the socket was closed for
+ * writing in the meantime.
+ *
+ * @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
+ */
+size_t core_transmit_notify (void *cls,
+ size_t size, void *buf)
+{
+ char *cbuf = buf;
+ struct PendingMessage *reply;
+ struct PendingMessage *client_reply;
+ size_t off;
+ size_t msize;
+
+ if (buf == NULL)
+ {
+ /* client disconnected */
+#if DEBUG_DV
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "`%s': buffer was NULL\n", "DHT");
+#endif
+ return 0;
+ }
+
+ core_transmit_handle = NULL;
+ off = 0;
+ reply = core_pending_head;
+ if ( (reply != NULL) &&
+ (size >= (msize = ntohs (reply->msg->size))))
+ {
+#if DEBUG_DV
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "`%s' : transmit_notify (core) called with size %d\n", "dv service", msize);
+#endif
+ GNUNET_CONTAINER_DLL_remove (core_pending_head,
+ core_pending_tail,
+ reply);
+ if (reply->send_result != NULL) /* Will only be non-null if a real client asked for this send */
+ {
+ client_reply = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(struct GNUNET_DV_SendResultMessage));
+ client_reply->msg = (struct GNUNET_MessageHeader *)&client_reply[1];
+ memcpy(&client_reply[1], reply->send_result, sizeof(struct GNUNET_DV_SendResultMessage));
+ GNUNET_free(reply->send_result);
+
+ GNUNET_CONTAINER_DLL_insert_after(plugin_pending_head, plugin_pending_tail, plugin_pending_tail, client_reply);
+ if (client_handle != NULL)
+ {
+ if (plugin_transmit_handle == NULL)
+ {
+ plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle,
+ sizeof(struct GNUNET_DV_SendResultMessage),
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ &transmit_to_plugin, NULL);
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Failed to queue message for plugin, must be one in progress already!!\n");
+ }
+ }
+ }
+ memcpy (&cbuf[off], reply->msg, msize);
+ GNUNET_free (reply);
+ off += msize;
+ }
+ reply = core_pending_head;
+ if (reply != NULL)
+ core_transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, reply->importance, reply->timeout, &reply->recipient, reply->msg_size, &core_transmit_notify, NULL);
+
+ return off;
+}
+
+
+/**
+ * Send a DV data message via DV.
+ *
+ * @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
+ */
+static int
+send_message_via (const struct GNUNET_PeerIdentity *sender,
+ const struct GNUNET_PeerIdentity *recipient,
+ struct DV_SendContext *send_context)
+{
+ p2p_dv_MESSAGE_Data *toSend;
+ unsigned int msg_size;
+ unsigned int recipient_id;
+ unsigned int sender_id;
+ struct DistantNeighbor *source;
+ struct PendingMessage *pending_message;
+ struct FindIDContext find_context;
+#if DEBUG_DV
+ char shortname[5];
+#endif
+
+ msg_size = send_context->message_size + sizeof (p2p_dv_MESSAGE_Data);
+
+ find_context.dest = send_context->distant_peer;
+ find_context.via = recipient;
+ find_context.tid = 0;
+ GNUNET_CONTAINER_multihashmap_get_multiple (extended_neighbors, &send_context->distant_peer->hashPubKey,
+ &find_specific_id, &find_context);
+
+ if (find_context.tid == 0)
+ {
+ GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: find_specific_id failed to find peer!\n", my_short_id);
+ /* target unknown to us, drop! */
+ return GNUNET_SYSERR;
+ }
+ recipient_id = find_context.tid;
+
+ if (0 == (memcmp (&my_identity,
+ sender, sizeof (struct GNUNET_PeerIdentity))))
+ {
+ sender_id = 0;
+ source = GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
+ &sender->hashPubKey);
+ if (source != NULL)
+ GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: send_message_via found %s, myself in extended peer list???\n", my_short_id, GNUNET_i2s(&source->identity));
+ }
+ else
+ {
+ source = GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
+ &sender->hashPubKey);
+ if (source == NULL)
+ {
+ /* sender unknown to us, drop! */
+ return GNUNET_SYSERR;
+ }
+ sender_id = source->our_id;
+ }
+
+ 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);
+
+ if (core_transmit_handle == NULL)
+ core_transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, send_context->importance, send_context->timeout, recipient, msg_size, &core_transmit_notify, NULL);
+ else
+ {
+#if DEBUG_DV
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "`%s': Failed to schedule pending transmission (must be one in progress!)\n", "dv service");
+#endif
+ }
+ return GNUNET_YES;
+}
+
+/**
+ * Given a FindLeastCostContext, and a set
+ * of peers that match the target, return the cheapest.
+ *
+ * @param cls closure, a struct FindLeastCostContext
+ * @param key the key identifying the target peer
+ * @param value the target peer
+ *
+ * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
+ */
+static int
+find_least_cost_peer (void *cls,
+ const GNUNET_HashCode *key,
+ void *value)
+{
+ struct FindLeastCostContext *find_context = cls;
+ struct DistantNeighbor *dn = value;
+
+ if (dn->cost < find_context->least_cost)
+ {
+ find_context->target = dn;
+ }
+ if (dn->cost == DIRECT_NEIGHBOR_COST)
+ return GNUNET_NO;
+ return GNUNET_YES;
+}
+
+/**
+ * Send a DV data message via DV.
+ *
+ * @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 timeout how long to possibly delay sending this message
+ */
+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)
+{
+ p2p_dv_MESSAGE_Data *toSend;
+ unsigned int msg_size;
+ unsigned int cost;
+ unsigned int recipient_id;
+ unsigned int sender_id;
+ struct DistantNeighbor *target;
+ struct DistantNeighbor *source;
+ struct PendingMessage *pending_message;
+ struct FindLeastCostContext find_least_ctx;
+#if DEBUG_DV_PEER_NUMBERS
+ struct GNUNET_CRYPTO_HashAsciiEncoded encPeerFrom;
+ struct GNUNET_CRYPTO_HashAsciiEncoded encPeerTo;
+ struct GNUNET_CRYPTO_HashAsciiEncoded encPeerVia;
+#endif
+ msg_size = message_size + sizeof (p2p_dv_MESSAGE_Data);
+
+ find_least_ctx.least_cost = -1;
+ find_least_ctx.target = NULL;
+ /*
+ * Need to find the least cost peer, lest the transport selection keep
+ * picking the same DV route for the same destination which results
+ * in messages looping forever. Relatively cheap, we don't iterate
+ * over all known peers, just those that apply.
+ */
+ GNUNET_CONTAINER_multihashmap_get_multiple (extended_neighbors,
+ &recipient->hashPubKey, &find_least_cost_peer, &find_least_ctx);
+ target = find_least_ctx.target;
+
+ if (target == NULL)
+ {
+ /* target unknown to us, drop! */
+ return GNUNET_SYSERR;
+ }
+ recipient_id = target->referrer_id;
+
+ source = GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
+ &sender->hashPubKey);
+ if (source == NULL)
+ {
+ if (0 != (memcmp (&my_identity,
+ sender, sizeof (struct GNUNET_PeerIdentity))))
+ {
+ /* sender unknown to us, drop! */
+ return GNUNET_SYSERR;
+ }
+ sender_id = 0; /* 0 == us */
+ }
+ else
+ {
+ /* find out the number that we use when we gossip about
+ the sender */
+ sender_id = source->our_id;
+ }
+
+#if DEBUG_DV_PEER_NUMBERS
+ GNUNET_CRYPTO_hash_to_enc (&source->identity.hashPubKey, &encPeerFrom);
+ GNUNET_CRYPTO_hash_to_enc (&target->referrer->identity.hashPubKey, &encPeerVia);
+ encPeerFrom.encoding[4] = '\0';
+ encPeerVia.encoding[4] = '\0';
+#endif
+ if ((sender_id != 0) && (0 == memcmp(&source->identity, &target->referrer->identity, sizeof(struct GNUNET_PeerIdentity))))
+ {
+ return 0;
+ }
+
+ 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);
+ 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
+ if (core_transmit_handle == NULL)
+ core_transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, importance, timeout, &target->referrer->identity, msg_size, &core_transmit_notify, NULL);
+ else
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: CORE ALREADY SENDING\n", "DV SEND MESSAGE", msg_size);
+ 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.
+ *
+ * @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.
+ */
+int checkPeerID (void *cls,
+ const GNUNET_HashCode * key,
+ void *value)
+{
+ struct CheckPeerContext *ctx = cls;
+ struct DistantNeighbor *distant = value;
+
+ if (memcmp(key, &ctx->sender_id, sizeof(unsigned int)) == 0)
+ {
+ ctx->peer = distant;
+ return GNUNET_NO;
+ }
+ return GNUNET_YES;
+
+}
+#endif
+
+
+/**
+ * Handler for messages parsed out by the tokenizer from
+ * DV DATA received for this peer.
+ *
+ * @param cls NULL
+ * @param client the TokenizedMessageContext which contains message information
+ * @param message the actual message
+ */
+void tokenized_message_handler (void *cls,
+ void *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ struct TokenizedMessageContext *ctx = client;
+ GNUNET_break_op (ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_GOSSIP);
+ GNUNET_break_op (ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_DATA);
+ if ( (ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_GOSSIP) &&
+ (ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_DATA) )
+ {
+#if DEBUG_DV_MESSAGES
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: Receives %s message for me, uid %u, total size %d cost %u from %s!\n", my_short_id, "DV DATA", ctx->uid, ntohs(message->size), 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 handler for dv data messages. Whatever this message
+ * contains all we really have to do is rip it out of its
+ * DV layering and give it to our pal the DV plugin to report
+ * in with.
+ *
+ * @param cls closure
+ * @param peer peer which sent the message (immediate sender)
+ * @param message the message
+ * @param latency the latency of the connection we received the message from
+ * @param distance the distance to the immediate peer
+ */
+static int handle_dv_data_message (void *cls,
+ const struct GNUNET_PeerIdentity * peer,
+ const struct GNUNET_MessageHeader * message,
+ struct GNUNET_TIME_Relative latency,
+ uint32_t distance)
+{
+ const p2p_dv_MESSAGE_Data *incoming = (const p2p_dv_MESSAGE_Data *) message;
+ const struct GNUNET_MessageHeader *packed_message;
+ struct DirectNeighbor *dn;
+ struct DistantNeighbor *pos;
+ unsigned int sid; /* Sender id */
+ unsigned int tid; /* Target id */
+ struct GNUNET_PeerIdentity original_sender;
+ struct GNUNET_PeerIdentity destination;
+ struct FindDestinationContext fdc;
+ struct TokenizedMessageContext tkm_ctx;
+#if USE_PEER_ID
+ struct CheckPeerContext checkPeerCtx;
+#endif
+ char *sender_id;
+ char *direct_id;
+ int ret;
+ size_t packed_message_size;
+ char *cbuf;
+#if NO_MST
+ size_t offset;
+#endif
+ packed_message_size = ntohs(incoming->header.size) - sizeof(p2p_dv_MESSAGE_Data);
+
+
+#if DEBUG_DV
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: Receives DATA message from %s size %d, packed size %d!\n", my_short_id, GNUNET_i2s(peer) , ntohs(incoming->header.size), packed_message_size);
+#endif
+
+ if (ntohs (incoming->header.size) < sizeof (p2p_dv_MESSAGE_Data) + sizeof (struct GNUNET_MessageHeader))
+ {
+
+#if DEBUG_DV
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "`%s': Message sizes don't add up, total size %u, expected at least %u!\n", "dv service", ntohs(incoming->header.size), sizeof (p2p_dv_MESSAGE_Data) + sizeof (struct GNUNET_MessageHeader));
+#endif
+ return GNUNET_SYSERR;
+ }
+
+ dn = GNUNET_CONTAINER_multihashmap_get (direct_neighbors,
+ &peer->hashPubKey);
+ if (dn == NULL)
+ {
+#if DEBUG_DV
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: dn NULL!\n", "dv");
+#endif
+ return GNUNET_OK;
+ }
+ sid = ntohl (incoming->sender);
+#if USE_PEER_ID
+ if (sid != 0)
+ {
+ checkPeerCtx.sender_id = sid;
+ checkPeerCtx.peer = NULL;
+ GNUNET_CONTAINER_multihashmap_iterate(extended_neighbors, &checkPeerID, &checkPeerCtx);
+ pos = checkPeerCtx.peer;
+ }
+ else
+ {
+ pos = GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
+ &peer->hashPubKey);
+ }
+#else
+ pos = dn->referee_head;
+ while ((NULL != pos) && (pos->referrer_id != sid))
+ pos = pos->next;
+#endif
+
+ if (pos == NULL)
+ {
+ direct_id = GNUNET_strdup(GNUNET_i2s(&dn->identity));
+#if DEBUG_DV
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: unknown sender (%u), Message from %s!\n", GNUNET_i2s(&my_identity), ntohl(incoming->sender), direct_id);
+#endif
+ GNUNET_free(direct_id);
+ pos = dn->referee_head;
+ while ((NULL != pos) && (pos->referrer_id != sid))
+ {
+ sender_id = strdup(GNUNET_i2s(&pos->identity));
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "I know sender %u %s\n", pos->referrer_id, sender_id);
+ GNUNET_free(sender_id);
+ pos = pos->next;
+ }
+
+#if DEBUG_MESSAGE_DROP
+ direct_id = GNUNET_strdup(GNUNET_i2s(&dn->identity));
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: DROPPING MESSAGE type %d, unknown sender! Message immediately from %s!\n", GNUNET_i2s(&my_identity), ntohs(((struct GNUNET_MessageHeader *)&incoming[1])->type), direct_id);
+ GNUNET_free(direct_id);
+#endif
+ /* unknown sender */
+ return GNUNET_OK;
+ }
+ original_sender = pos->identity;
+ tid = ntohl (incoming->recipient);
+ if (tid == 0)
+ {
+ /* 0 == us */
+ cbuf = (char *)&incoming[1];
+
+ tkm_ctx.peer = peer;
+ tkm_ctx.distant = pos;
+ tkm_ctx.uid = ntohl(incoming->uid);
+ if (GNUNET_OK != GNUNET_SERVER_mst_receive (coreMST,
+ &tkm_ctx,
+ cbuf,
+ packed_message_size,
+ GNUNET_NO,
+ GNUNET_NO))
+ {
+ GNUNET_break_op(0);
+ GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: %s Received corrupt data, discarding!", my_short_id, "DV SERVICE");
+ }
+#if NO_MST
+ offset = 0;
+ while(offset < packed_message_size)
+ {
+ packed_message = (struct GNUNET_MessageHeader *)&cbuf[offset];
+
+ GNUNET_break_op (ntohs (packed_message->type) != GNUNET_MESSAGE_TYPE_DV_GOSSIP);
+ GNUNET_break_op (ntohs (packed_message->type) != GNUNET_MESSAGE_TYPE_DV_DATA);
+ if ( (ntohs (packed_message->type) != GNUNET_MESSAGE_TYPE_DV_GOSSIP) &&
+ (ntohs (packed_message->type) != GNUNET_MESSAGE_TYPE_DV_DATA) )
+ {
+#if DEBUG_DV_MESSAGES
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: Receives %s message(s) for me, uid %u, total size %d cost %u from %s!\n", my_short_id, "DV DATA", ntohl(incoming->uid), ntohs(packed_message->size), pos->cost, GNUNET_i2s(&pos->identity));
+#endif
+ GNUNET_assert(memcmp(peer, &pos->identity, sizeof(struct GNUNET_PeerIdentity)) != 0);
+ send_to_plugin(peer, packed_message, ntohs(packed_message->size), &pos->identity, pos->cost);
+ }
+ offset += ntohs(packed_message->size);
+ }
+#endif
+ return GNUNET_OK;
+ }
+ else
+ {
+ packed_message = (struct GNUNET_MessageHeader *)&incoming[1];
+ }
+
+ /* FIXME: this is the *only* per-request operation we have in DV
+ that is O(n) in relation to the number of connected peers; a
+ hash-table lookup could easily solve this (minor performance
+ issue) */
+ fdc.tid = tid;
+ fdc.dest = NULL;
+ GNUNET_CONTAINER_heap_iterate (neighbor_max_heap,
+ &find_destination, &fdc);
+
+#if DEBUG_DV
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: Receives %s message for someone else!\n", "dv", "DV DATA");
+#endif
+
+ if (fdc.dest == NULL)
+ {
+#if DEBUG_DV_MESSAGES
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: Receives %s message uid %u for someone we don't know (id %u)!\n", my_short_id, "DV DATA", ntohl(incoming->uid), tid);
+#endif
+ return GNUNET_OK;
+ }
+ destination = fdc.dest->identity;
+
+ if (0 == memcmp (&destination, peer, sizeof (struct GNUNET_PeerIdentity)))
+ {
+ /* FIXME: create stat: routing loop-discard! */
+#if DEBUG_DV_PEER_NUMBERS
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "\n\n\nLoopy loo message\n\n\n");
+#endif
+
+#if DEBUG_DV_MESSAGES
+ direct_id = GNUNET_strdup(GNUNET_i2s(&dn->identity));
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: DROPPING MESSAGE uid %u type %d, routing loop! Message immediately from %s!\n", my_short_id, ntohl(incoming->uid), ntohs(packed_message->type), direct_id);
+#endif
+ return GNUNET_OK;
+ }
+
+ /* At this point we have a message, and we need to forward it on to the
+ * next DV hop.
+ */
+ /* FIXME: Can't send message on, we have to behave.
+ * We have to tell core we have a message for the next peer, and let
+ * transport do transport selection on how to get this message to 'em */
+ /*ret = send_message (&destination,
+ &original_sender,
+ packed_message, DV_PRIORITY, DV_DELAY);*/
+
+#if DEBUG_DV_MESSAGES
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: FORWARD %s message for %s, uid %u, size %d type %d, cost %u!\n", my_short_id, "DV DATA", GNUNET_i2s(&destination), ntohl(incoming->uid), ntohs(packed_message->size), ntohs(packed_message->type), pos->cost);
+#endif
+
+ ret = send_message(&destination,
+ &original_sender,
+ NULL,
+ packed_message,
+ packed_message_size,
+ default_dv_priority,
+ ntohl(incoming->uid),
+ GNUNET_TIME_relative_get_forever());
+
+ if (ret != GNUNET_SYSERR)
+ return GNUNET_OK;
+ else
+ {
+#if DEBUG_MESSAGE_DROP
+ direct_id = GNUNET_strdup(GNUNET_i2s(&dn->identity));
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: DROPPING MESSAGE type %d, forwarding failed! Message immediately from %s!\n", GNUNET_i2s(&my_identity), ntohs(((struct GNUNET_MessageHeader *)&incoming[1])->type), direct_id);
+#endif
+ return GNUNET_SYSERR;
+ }
+}
+
+#if DEBUG_DV
+/**
+ * Iterator over hash map entries.
+ *
+ * @param cls closure (NULL)
+ * @param key current key code
+ * @param value value in the hash map (DistantNeighbor)
+ * @return GNUNET_YES if we should continue to
+ * iterate,
+ * GNUNET_NO if not.
+ */
+int print_neighbors (void *cls,
+ const GNUNET_HashCode * key,
+ void *value)
+{
+ struct DistantNeighbor *distant_neighbor = value;
+ char my_shortname[5];
+ char referrer_shortname[5];
+ memcpy(&my_shortname, GNUNET_i2s(&my_identity), 4);
+ my_shortname[4] = '\0';
+ memcpy(&referrer_shortname, GNUNET_i2s(&distant_neighbor->referrer->identity), 4);
+ referrer_shortname[4] = '\0';
+
+ GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "`%s' %s: Peer `%s', distance %d, referrer `%s' pkey: %s\n", &my_shortname, "DV", GNUNET_i2s(&distant_neighbor->identity), distant_neighbor->cost, &referrer_shortname, distant_neighbor->pkey == NULL ? "no" : "yes");
+ return GNUNET_YES;
+}
+#endif
+
+/**
+ * Scheduled task which gossips about known direct peers to other connected
+ * peers. Will run until called with reason shutdown.
+ */
+static void
+neighbor_send_task (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ 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)
+ {
+#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
+ pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(p2p_dv_MESSAGE_NeighborInfo));
+ pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
+ pending_message->importance = default_dv_priority;
+ pending_message->timeout = GNUNET_TIME_relative_get_forever();
+ memcpy(&pending_message->recipient, &to->identity, sizeof(struct GNUNET_PeerIdentity));
+ pending_message->msg_size = sizeof(p2p_dv_MESSAGE_NeighborInfo);
+ message = (p2p_dv_MESSAGE_NeighborInfo *)pending_message->msg;
+ message->header.size = htons (sizeof (p2p_dv_MESSAGE_NeighborInfo));
+ message->header.type = htons (GNUNET_MESSAGE_TYPE_DV_GOSSIP);
+ message->cost = htonl (about->cost);
+ message->neighbor_id = htonl (about->our_id);
+
+ memcpy (&message->pkey, about->pkey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
+ memcpy (&message->neighbor,
+ &about->identity, sizeof (struct GNUNET_PeerIdentity));
+
+ GNUNET_CONTAINER_DLL_insert_after (core_pending_head,
+ core_pending_tail,
+ core_pending_tail,
+ pending_message);
+
+ if (core_transmit_handle == NULL)
+ core_transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, default_dv_priority, GNUNET_TIME_relative_get_forever(), &to->identity, sizeof(p2p_dv_MESSAGE_NeighborInfo), &core_transmit_notify, NULL);
+
+ }
+
+ if (send_context->fast_gossip_list_head != NULL) /* If there are other peers in the fast list, schedule right away */
+ {
+#if DEBUG_DV_PEER_NUMBERS
+ GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "DV SERVICE: still in fast send mode\n");
+#endif
+ send_context->task = GNUNET_SCHEDULER_add_now(sched, &neighbor_send_task, send_context);
+ }
+ else
+ {
+#if DEBUG_DV_PEER_NUMBERS
+ GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "DV SERVICE: entering slow send mode\n");
+#endif
+ send_context->task = GNUNET_SCHEDULER_add_delayed(sched, GNUNET_DV_DEFAULT_SEND_INTERVAL, &neighbor_send_task, send_context);
+ }
+
+ return;
+}
+
+
+/**
+ * Handle START-message. This is the first message sent to us
+ * by the client (can only be one!).
+ *
+ * @param cls closure (always NULL)
+ * @param client identification of the client
+ * @param message the actual message
+ */
+static void
+handle_start (void *cls,
+ struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+
+#if DEBUG_DV
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received `%s' request from client\n", "START");
+#endif
+
+ client_handle = client;
+
+ GNUNET_SERVER_client_keep(client_handle);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+}
+
+#if UNSIMPLER
+/**
+ * Iterate over hash map entries for a distant neighbor,
+ * if direct neighbor matches context call send message
+ *
+ * @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.
+ */
+int send_iterator (void *cls,
+ const GNUNET_HashCode * key,
+ void *value)
+{
+ struct DV_SendContext *send_context = cls;
+ struct DistantNeighbor *distant_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;
+ }
+ return GNUNET_YES;
+}
+#endif
+
+/**
+ * Service server's handler for message send requests (which come
+ * bubbling up to us through the DV plugin).
+ *
+ * @param cls closure
+ * @param client identification of the client
+ * @param message the actual message
+ */
+void handle_dv_send_message (void *cls,
+ struct GNUNET_SERVER_Client * client,
+ const struct GNUNET_MessageHeader * message)
+{
+ struct GNUNET_DV_SendMessage *send_msg;
+ struct GNUNET_DV_SendResultMessage *send_result_msg;
+ struct PendingMessage *pending_message;
+ size_t address_len;
+ size_t message_size;
+ struct GNUNET_PeerIdentity *destination;
+ struct GNUNET_PeerIdentity *direct;
+ struct GNUNET_MessageHeader *message_buf;
+ char *temp_pos;
+ int offset;
+ static struct GNUNET_CRYPTO_HashAsciiEncoded dest_hash;
+ struct DV_SendContext *send_context;
+#if DEBUG_DV_MESSAGES
+ char *cbuf;
+ struct GNUNET_MessageHeader *packed_message;
+#endif
+
+ if (client_handle == NULL)
+ {
+ client_handle = client;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: Setting initial client handle, never received `%s' message?\n", "dv", "START");
+ }
+ else if (client_handle != client)
+ {
+ client_handle = client;
+ /* What should we do in this case, assert fail or just log the warning? */
+#if DEBUG_DV
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: Setting client handle (was a different client!)!\n", "dv");
+#endif
+ }
+
+ GNUNET_assert(ntohs(message->size) > sizeof(struct GNUNET_DV_SendMessage));
+ send_msg = (struct GNUNET_DV_SendMessage *)message;
+
+ address_len = ntohl(send_msg->addrlen);
+ GNUNET_assert(address_len == sizeof(struct GNUNET_PeerIdentity) * 2);
+ message_size = ntohs(message->size) - sizeof(struct GNUNET_DV_SendMessage) - address_len;
+ destination = GNUNET_malloc(sizeof(struct GNUNET_PeerIdentity));
+ direct = GNUNET_malloc(sizeof(struct GNUNET_PeerIdentity));
+ message_buf = GNUNET_malloc(message_size);
+
+ temp_pos = (char *)&send_msg[1]; /* Set pointer to end of message */
+ offset = 0; /* Offset starts at zero */
+
+ memcpy(destination, &temp_pos[offset], sizeof(struct GNUNET_PeerIdentity));
+ offset += sizeof(struct GNUNET_PeerIdentity);
+
+ memcpy(direct, &temp_pos[offset], sizeof(struct GNUNET_PeerIdentity));
+ offset += sizeof(struct GNUNET_PeerIdentity);
+
+
+ memcpy(message_buf, &temp_pos[offset], message_size);
+ if (memcmp(&send_msg->target, destination, sizeof(struct GNUNET_PeerIdentity)) != 0)
+ {
+ GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */
+ dest_hash.encoding[4] = '\0';
+ GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: asked to send message to `%s', but address is for `%s'!", "DV SERVICE", GNUNET_i2s(&send_msg->target), (const char *)&dest_hash.encoding);
+ }
+
+#if DEBUG_DV_MESSAGES
+ cbuf = (char *)message_buf;
+ offset = 0;
+ while(offset < message_size)
+ {
+ packed_message = (struct GNUNET_MessageHeader *)&cbuf[offset];
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: DV PLUGIN SEND uid %u type %d to %s\n", my_short_id, ntohl(send_msg->uid), ntohs(packed_message->type), GNUNET_i2s(destination));
+ offset += ntohs(packed_message->size);
+ }
+ /*GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: DV PLUGIN SEND uid %u type %d to %s\n", my_short_id, ntohl(send_msg->uid), ntohs(message_buf->type), GNUNET_i2s(destination));*/
+#endif
+ GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */
+ dest_hash.encoding[4] = '\0';
+ send_context = GNUNET_malloc(sizeof(struct DV_SendContext));
+
+ send_result_msg = GNUNET_malloc(sizeof(struct GNUNET_DV_SendResultMessage));
+ send_result_msg->header.size = htons(sizeof(struct GNUNET_DV_SendResultMessage));
+ send_result_msg->header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_DV_SEND_RESULT);
+ send_result_msg->uid = send_msg->uid; /* No need to ntohl->htonl this */
+
+ send_context->importance = ntohl(send_msg->priority);
+ send_context->timeout = send_msg->timeout;
+ send_context->direct_peer = direct;
+ send_context->distant_peer = destination;
+ send_context->message = message_buf;
+ send_context->message_size = message_size;
+ send_context->send_result = send_result_msg;
+#if DEBUG_DV_MESSAGES
+ send_context->uid = send_msg->uid;
+#endif
+
+ if (send_message_via(&my_identity, direct, send_context) != GNUNET_YES)
+ {
+ send_result_msg->result = htons(1);
+ pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(struct GNUNET_DV_SendResultMessage));
+ pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
+ memcpy(&pending_message[1], send_result_msg, sizeof(struct GNUNET_DV_SendResultMessage));
+ GNUNET_free(send_result_msg);
+
+ GNUNET_CONTAINER_DLL_insert_after(plugin_pending_head, plugin_pending_tail, plugin_pending_tail, pending_message);
+
+ if (client_handle != NULL)
+ {
+ if (plugin_transmit_handle == NULL)
+ {
+ plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle,
+ sizeof(struct GNUNET_DV_SendResultMessage),
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ &transmit_to_plugin, NULL);
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Failed to queue message for plugin, must be one in progress already!!\n");
+ }
+ }
+ GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */
+ dest_hash.encoding[4] = '\0';
+ GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s DV SEND failed to send message to destination `%s' via `%s'\n", my_short_id, (const char *)&dest_hash.encoding, GNUNET_i2s(direct));
+ }
+
+ /* In bizarro world GNUNET_SYSERR indicates that we succeeded */
+#if UNSIMPLER
+ if (GNUNET_SYSERR != GNUNET_CONTAINER_multihashmap_get_multiple(extended_neighbors, &destination->hashPubKey, &send_iterator, send_context))
+ {
+ send_result_msg->result = htons(1);
+ pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(struct GNUNET_DV_SendResultMessage));
+ pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
+ memcpy(&pending_message[1], send_result_msg, sizeof(struct GNUNET_DV_SendResultMessage));
+ GNUNET_free(send_result_msg);
+
+ GNUNET_CONTAINER_DLL_insert_after(plugin_pending_head, plugin_pending_tail, plugin_pending_tail, pending_message);
+
+ if (client_handle != NULL)
+ {
+ if (plugin_transmit_handle == NULL)
+ {
+ plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle,
+ sizeof(struct GNUNET_DV_SendResultMessage),
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ &transmit_to_plugin, NULL);
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Failed to queue message for plugin, must be one in progress already!!\n");
+ }
+ }
+ GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */
+ dest_hash.encoding[4] = '\0';
+ GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s DV SEND failed to send message to destination `%s' via `%s'\n", my_short_id, (const char *)&dest_hash.encoding, GNUNET_i2s(direct));
+ }
+#endif
+ GNUNET_free(message_buf);
+ GNUNET_free(send_context);
+ GNUNET_free(direct);
+ GNUNET_free(destination);
+
+ GNUNET_SERVER_receive_done(client, GNUNET_OK);
+}
+
+/** Forward declarations **/
+static int handle_dv_gossip_message (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ const struct GNUNET_MessageHeader *message,
+ struct GNUNET_TIME_Relative latency,
+ uint32_t distance);
+
+static int handle_dv_disconnect_message (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ const struct GNUNET_MessageHeader *message,
+ struct GNUNET_TIME_Relative latency,
+ uint32_t distance);
+/** End forward declarations **/
+
+
+/**
+ * List of handlers for the messages understood by this
+ * service.
+ *
+ * Hmm... will we need to register some handlers with core and
+ * some handlers with our server here? Because core should be
+ * getting the incoming DV messages (from whichever lower level
+ * transport) and then our server should be getting messages
+ * from the dv_plugin, right?
+ */
+static struct GNUNET_CORE_MessageHandler core_handlers[] = {
+ {&handle_dv_data_message, GNUNET_MESSAGE_TYPE_DV_DATA, 0},
+ {&handle_dv_gossip_message, GNUNET_MESSAGE_TYPE_DV_GOSSIP, 0},
+ {&handle_dv_disconnect_message, GNUNET_MESSAGE_TYPE_DV_DISCONNECT, 0},
+ {NULL, 0, 0}
+};
+
+static struct GNUNET_SERVER_MessageHandler plugin_handlers[] = {
+ {&handle_dv_send_message, NULL, GNUNET_MESSAGE_TYPE_TRANSPORT_DV_SEND, 0},
+ {&handle_start, NULL, GNUNET_MESSAGE_TYPE_DV_START, 0},
+ {NULL, NULL, 0, 0}
+};
+
+/**
+ * Free a DistantNeighbor node, including removing it
+ * from the referer's list.
+ */
+static void
+distant_neighbor_free (struct DistantNeighbor *referee)
+{
+ struct DirectNeighbor *referrer;
+
+ referrer = referee->referrer;
+ if (referrer != NULL)
+ {
+ GNUNET_CONTAINER_DLL_remove (referrer->referee_head,
+ referrer->referee_tail, referee);
+ }
+ GNUNET_CONTAINER_heap_remove_node (neighbor_max_heap, referee->max_loc);
+ GNUNET_CONTAINER_heap_remove_node (neighbor_min_heap, referee->min_loc);
+ GNUNET_CONTAINER_multihashmap_remove_all (extended_neighbors,
+ &referee->identity.hashPubKey);
+ GNUNET_free_non_null (referee->pkey);
+ GNUNET_free (referee);
+}
+
+/**
+ * Free a DirectNeighbor node, including removing it
+ * from the referer's list.
+ */
+static void
+direct_neighbor_free (struct DirectNeighbor *direct)
+{
+ struct NeighborSendContext *send_context;
+ struct FastGossipNeighborList *about_list;
+ struct FastGossipNeighborList *prev_about;
+
+ send_context = direct->send_context;
+
+ if (send_context->task != GNUNET_SCHEDULER_NO_TASK)
+ GNUNET_SCHEDULER_cancel(sched, send_context->task);
+
+ about_list = send_context->fast_gossip_list_head;
+ while (about_list != NULL)
+ {
+ GNUNET_CONTAINER_DLL_remove(send_context->fast_gossip_list_head, send_context->fast_gossip_list_tail, about_list);
+ prev_about = about_list;
+ about_list = about_list->next;
+ GNUNET_free(prev_about);
+ }
+ GNUNET_free(send_context);
+ GNUNET_free(direct);
+}
+
+/**
+ * Multihashmap iterator for sending out disconnect messages
+ * for a peer.
+ *
+ * @param cls the peer that was disconnected
+ * @param key key value stored under
+ * @param value the direct neighbor to send disconnect to
+ *
+ * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
+ */
+static int schedule_disconnect_messages (void *cls,
+ const GNUNET_HashCode * key,
+ void *value)
+{
+ struct DisconnectContext *disconnect_context = cls;
+ struct DirectNeighbor *disconnected = disconnect_context->direct;
+ struct DirectNeighbor *notify = value;
+ struct PendingMessage *pending_message;
+ p2p_dv_MESSAGE_Disconnect *disconnect_message;
+
+ if (memcmp(¬ify->identity, &disconnected->identity, sizeof(struct GNUNET_PeerIdentity)) == 0)
+ return GNUNET_YES; /* Don't send disconnect message to peer that disconnected! */
+
+ pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(p2p_dv_MESSAGE_Disconnect));
+ pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
+ pending_message->importance = default_dv_priority;
+ pending_message->timeout = GNUNET_TIME_relative_get_forever();
+ memcpy(&pending_message->recipient, ¬ify->identity, sizeof(struct GNUNET_PeerIdentity));
+ pending_message->msg_size = sizeof(p2p_dv_MESSAGE_Disconnect);
+ disconnect_message = (p2p_dv_MESSAGE_Disconnect *)pending_message->msg;
+ disconnect_message->header.size = htons (sizeof (p2p_dv_MESSAGE_Disconnect));
+ disconnect_message->header.type = htons (GNUNET_MESSAGE_TYPE_DV_DISCONNECT);
+ disconnect_message->peer_id = htonl(disconnect_context->distant->our_id);
+
+ GNUNET_CONTAINER_DLL_insert_after (core_pending_head,
+ core_pending_tail,
+ core_pending_tail,
+ pending_message);
+
+ if (core_transmit_handle == NULL)
+ core_transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, default_dv_priority, GNUNET_TIME_relative_get_forever(), ¬ify->identity, sizeof(p2p_dv_MESSAGE_Disconnect), &core_transmit_notify, NULL);
+
+ return GNUNET_YES;
+}
+
+/**
+ * Multihashmap iterator for freeing extended neighbors.
+ *
+ * @param cls NULL
+ * @param key key value stored under
+ * @param value the distant neighbor to be freed
+ *
+ * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
+ */
+static int free_extended_neighbors (void *cls,
+ const GNUNET_HashCode * key,
+ void *value)
+{
+ struct DistantNeighbor *distant = value;
+ distant_neighbor_free(distant);
+ return GNUNET_YES;
+}
+
+/**
+ * Multihashmap iterator for freeing direct neighbors.
+ *
+ * @param cls NULL
+ * @param key key value stored under
+ * @param value the direct neighbor to be freed
+ *
+ * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
+ */
+static int free_direct_neighbors (void *cls,
+ const GNUNET_HashCode * key,
+ void *value)
+{
+ struct DirectNeighbor *direct = value;
+ direct_neighbor_free(direct);
+ return GNUNET_YES;
+}
+
+
+/**
+ * Task run during shutdown.
+ *
+ * @param cls unused
+ * @param tc unused
+ */
+static void
+shutdown_task (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+#if DEBUG_DV
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "calling CORE_DISCONNECT\n");
+ GNUNET_CONTAINER_multihashmap_iterate(extended_neighbors, &print_neighbors, NULL);
+#endif
+ GNUNET_CONTAINER_multihashmap_iterate(extended_neighbors, &free_extended_neighbors, NULL);
+ GNUNET_CONTAINER_multihashmap_destroy(extended_neighbors);
+ GNUNET_CONTAINER_multihashmap_iterate(direct_neighbors, &free_direct_neighbors, NULL);
+ GNUNET_CONTAINER_multihashmap_destroy(direct_neighbors);
+
+ GNUNET_CONTAINER_heap_destroy(neighbor_max_heap);
+ GNUNET_CONTAINER_heap_destroy(neighbor_min_heap);
+
+ GNUNET_CORE_disconnect (coreAPI);
+ GNUNET_PEERINFO_disconnect(peerinfo_handle);
+ GNUNET_SERVER_mst_destroy(coreMST);
+ GNUNET_free_non_null(my_short_id);
+#if DEBUG_DV
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "CORE_DISCONNECT completed\n");
+#endif
+}
+
+/**
+ * To be called on core init/fail.
*/
-static struct GNUNET_CORE_Handle *coreAPI;
+void core_init (void *cls,
+ struct GNUNET_CORE_Handle * server,
+ const struct GNUNET_PeerIdentity *identity,
+ const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded * publicKey)
+{
+
+ if (server == NULL)
+ {
+ GNUNET_SCHEDULER_cancel(sched, cleanup_task);
+ GNUNET_SCHEDULER_add_now(sched, &shutdown_task, NULL);
+ return;
+ }
+#if DEBUG_DV
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: Core connection initialized, I am peer: %s\n", "dv", GNUNET_i2s(identity));
+#endif
+ memcpy(&my_identity, identity, sizeof(struct GNUNET_PeerIdentity));
+ my_short_id = GNUNET_strdup(GNUNET_i2s(&my_identity));
+ coreAPI = server;
+}
-static struct GNUNET_PeerIdentity *my_identity;
-const struct GNUNET_CONFIGURATION_Handle *cfg;
+#if PKEY_NO_NEIGHBOR_ON_ADD
+/**
+ * Iterator over hash map entries.
+ *
+ * @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.
+ */
+static int add_pkey_to_extended (void *cls,
+ const GNUNET_HashCode * key,
+ void *value)
+{
+ struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pkey = cls;
+ struct DistantNeighbor *distant_neighbor = value;
-struct GNUNET_SCHEDULER_Handle *sched;
+ if (distant_neighbor->pkey == NULL)
+ {
+ distant_neighbor->pkey = GNUNET_malloc(sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
+ memcpy(distant_neighbor->pkey, pkey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
+ }
-GNUNET_SCHEDULER_TaskIdentifier cleanup_task;
+ return GNUNET_YES;
+}
+#endif
/**
- * Core handler for dv data messages. Whatever this message
- * contains all we really have to do is rip it out of its
- * DV layering and give it to our pal the DV plugin to report
- * in with.
+ * Iterator over hash map entries.
*
* @param cls closure
- * @param client identification of the client
- * @param message the actual message
+ * @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.
+ */
+static int update_matching_neighbors (void *cls,
+ const GNUNET_HashCode * key,
+ void *value)
+{
+ struct NeighborUpdateInfo * update_info = cls;
+ struct DistantNeighbor *distant_neighbor = value;
+
+ if (update_info->referrer == distant_neighbor->referrer) /* Direct neighbor matches, update it's info and return GNUNET_NO */
+ {
+ /* 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;
+ }
+
+ return GNUNET_YES;
+}
+
+
+/**
+ * Iterate over all current direct peers, add DISTANT newly connected
+ * peer to the fast gossip list for that peer so we get DV routing
+ * information out as fast as possible!
+ *
+ * @param cls the newly connected neighbor we will gossip about
+ * @param key the hashcode of the peer
+ * @param value the direct neighbor we should gossip to
+ *
+ * @return GNUNET_YES to continue iteration, GNUNET_NO otherwise
*/
-void handle_dv_data_message (void *cls,
- struct GNUNET_SERVER_Client *
- client,
- const struct
- GNUNET_MessageHeader *
- message)
+static int add_distant_all_direct_neighbors (void *cls,
+ const GNUNET_HashCode * 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;
+ }
+
+ if (memcmp(&direct->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);
#if DEBUG_DV
+ encPeerAbout = GNUNET_strdup(GNUNET_i2s(&distant->identity));
+ encPeerTo = GNUNET_strdup(GNUNET_i2s(&direct->identity));
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Fast send info about peer %s id %u for directly connected peer %s\n",
+ GNUNET_i2s(&my_identity),
+ encPeerAbout, distant->our_id, encPeerTo);
+ GNUNET_free(encPeerAbout);
+ GNUNET_free(encPeerTo);
+#endif
+ /*if (send_context->task != GNUNET_SCHEDULER_NO_TASK)
+ GNUNET_SCHEDULER_cancel(sched, send_context->task);*/
+
+ send_context->task = GNUNET_SCHEDULER_add_now(sched, &neighbor_send_task, send_context);
+ return GNUNET_YES;
+}
+
+/**
+ * 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;
+ char *addr_buffer;
+ size_t offset;
+ size_t size;
+ size_t ret;
+ char *addr1;
+ char *addr2;
+
+ 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));
+ addr1 = GNUNET_strdup(GNUNET_i2s(hello_context->direct_peer));
+ addr2 = GNUNET_strdup(GNUNET_i2s(&hello_context->distant_peer));
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: GIVING HELLO for %s via %s to TRANSPORT\n", my_short_id, addr2, addr1);
+ GNUNET_free(addr1);
+ GNUNET_free(addr2);
+ ret = GNUNET_HELLO_add_address ("dv",
+ GNUNET_TIME_relative_to_absolute
+ (GNUNET_TIME_UNIT_HOURS), addr_buffer, size,
+ buf, max);
+
+ hello_context->addresses_to_add--;
+
+ GNUNET_free(addr_buffer);
+ return ret;
+}
+
+
+/**
+ * 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'
+ *
+ * @return the added neighbor, the updated neighbor or NULL (neighbor
+ * not added)
+ */
+static struct DistantNeighbor *
+addUpdateNeighbor (const struct GNUNET_PeerIdentity * peer, struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pkey,
+ unsigned int referrer_peer_id,
+ struct DirectNeighbor *referrer, unsigned int cost)
+{
+ 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;
+
+#if DEBUG_DV_PEER_NUMBERS
+ char *encAbout;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Receives %s message!\n", "dv", "DV DATA");
+ "%s Received sender id (%u)!\n", "DV SERVICE", referrer_peer_id);
+#endif
+
+ now = GNUNET_TIME_absolute_get ();
+ neighbor = GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
+ &peer->hashPubKey);
+ neighbor_update = GNUNET_malloc(sizeof(struct NeighborUpdateInfo));
+ neighbor_update->neighbor = neighbor;
+ neighbor_update->cost = cost;
+ neighbor_update->now = now;
+ neighbor_update->referrer = referrer;
+ neighbor_update->referrer_peer_id = referrer_peer_id;
+
+ if (neighbor != NULL)
+ {
+#if USE_PEER_ID
+ memcpy(&our_id, &neighbor->identity, sizeof(unsigned int));
+#else
+ our_id = neighbor->our_id;
+#endif
+ }
+ else
+ {
+#if USE_PEER_ID
+ memcpy(&our_id, peer, sizeof(unsigned int));
+#else
+ our_id = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, RAND_MAX - 1) + 1;
+#endif
+ }
+
+ /* Either we do not know this peer, or we already do but via a different immediate peer */
+ if ((neighbor == NULL) ||
+ (GNUNET_CONTAINER_multihashmap_get_multiple(extended_neighbors,
+ &peer->hashPubKey,
+ &update_matching_neighbors,
+ neighbor_update) != GNUNET_SYSERR))
+ {
+
+#if AT_MOST_ONE
+ if ((neighbor != NULL) && (cost < neighbor->cost)) /* New cost is less than old, remove old */
+ {
+ distant_neighbor_free(neighbor);
+ }
+ else if (neighbor != NULL) /* Only allow one DV connection to each peer */
+ {
+ return NULL;
+ }
+#endif
+ /* new neighbor! */
+ if (cost > fisheye_depth)
+ {
+ /* too costly */
+ GNUNET_free(neighbor_update);
+ return NULL;
+ }
+
+#if DEBUG_DV_PEER_NUMBERS
+ encAbout = GNUNET_strdup(GNUNET_i2s(peer));
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: %s Chose NEW id (%u) for peer %s!\n", GNUNET_i2s(&my_identity), "DV SERVICE", our_id, encAbout);
+ GNUNET_free(encAbout);
#endif
+
+ if (max_table_size <=
+ GNUNET_CONTAINER_multihashmap_size (extended_neighbors))
+ {
+ /* remove most expensive entry */
+ max = GNUNET_CONTAINER_heap_peek (neighbor_max_heap);
+ GNUNET_assert(max != NULL);
+ if (cost > max->cost)
+ {
+ /* new entry most expensive, don't create */
+ GNUNET_free(neighbor_update);
+ return NULL;
+ }
+ if (max->cost > 1)
+ {
+ /* only free if this is not a direct connection;
+ we could theoretically have more direct
+ connections than DV entries allowed total! */
+ distant_neighbor_free (max);
+ }
+ }
+
+ neighbor = GNUNET_malloc (sizeof (struct DistantNeighbor));
+ GNUNET_CONTAINER_DLL_insert (referrer->referee_head,
+ referrer->referee_tail, neighbor);
+ neighbor->max_loc = GNUNET_CONTAINER_heap_insert (neighbor_max_heap,
+ neighbor, cost);
+ neighbor->min_loc = GNUNET_CONTAINER_heap_insert (neighbor_min_heap,
+ neighbor, cost);
+ neighbor->referrer = referrer;
+ memcpy (&neighbor->identity, peer, sizeof (struct GNUNET_PeerIdentity));
+ if (pkey != NULL) /* pkey will be null on direct neighbor addition */
+ {
+ neighbor->pkey = GNUNET_malloc(sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
+ memcpy (neighbor->pkey, pkey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
+ }
+ else
+ neighbor->pkey = pkey;
+
+ neighbor->last_activity = now;
+ neighbor->cost = cost;
+ neighbor->referrer_id = referrer_peer_id;
+ neighbor->our_id = our_id;
+ neighbor->hidden =
+ (cost == DIRECT_NEIGHBOR_COST) ? (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 4) ==
+ 0) : GNUNET_NO;
+
+ GNUNET_CONTAINER_multihashmap_put (extended_neighbors, &peer->hashPubKey,
+ neighbor,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
+
+ if (cost != DIRECT_NEIGHBOR_COST)
+ {
+ /* 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);
+ 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);
+ }
+
+ }
+ else
+ {
+#if DEBUG_DV_GOSSIP
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: Already know peer %s distance %d, referrer id %d!\n", "dv", GNUNET_i2s(peer), cost, referrer_peer_id);
+#endif
+ }
+#if DEBUG_DV
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: Size of extended_neighbors is %d\n", "dv", GNUNET_CONTAINER_multihashmap_size(extended_neighbors));
+#endif
+
+ GNUNET_free(neighbor_update);
+ return neighbor;
+}
+
+
+/**
+ * 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.
+ *
+ * @param cls closure
+ * @param peer peer which sent the message (immediate sender)
+ * @param message the message
+ * @param latency the latency of the connection we received the message from
+ * @param distance the distance to the immediate peer
+ */
+static int handle_dv_disconnect_message (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ const struct GNUNET_MessageHeader *message,
+ struct GNUNET_TIME_Relative latency,
+ uint32_t distance)
+{
+ 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;
+
+ distant = referrer->referee_head;
+ while (distant != NULL)
+ {
+ if (distant->referrer_id == ntohl(enc_message->peer_id))
+ {
+ distant_neighbor_free(distant);
+ }
+ distant = referrer->referee_head;
+ }
+
+ return GNUNET_OK;
}
+
/**
* Core handler for dv gossip messages. These will be used
* by us to create a HELLO message for the newly peer containing
* transport service so that it can be used by all others.
*
* @param cls closure
- * @param client identification of the client
- * @param message the actual message
+ * @param peer peer which sent the message (immediate sender)
+ * @param message the message
+ * @param latency the latency of the connection we received the message from
+ * @param distance the distance to the immediate peer
*/
-void handle_dv_gossip_message (void *cls,
- struct GNUNET_SERVER_Client *
- client,
- const struct GNUNET_MessageHeader *
- message)
+static int handle_dv_gossip_message (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ const struct GNUNET_MessageHeader *message,
+ struct GNUNET_TIME_Relative latency,
+ uint32_t distance)
{
-#if DEBUG_DV
+ struct DirectNeighbor *referrer;
+ p2p_dv_MESSAGE_NeighborInfo *enc_message = (p2p_dv_MESSAGE_NeighborInfo *)message;
+
+ if (ntohs (message->size) < sizeof (p2p_dv_MESSAGE_NeighborInfo))
+ {
+ return GNUNET_SYSERR; /* invalid message */
+ }
+
+#if DEBUG_DV_GOSSIP_RECEIPT
+ char * encPeerAbout;
+ char * encPeerFrom;
+
+ encPeerAbout = GNUNET_strdup(GNUNET_i2s(&enc_message->neighbor));
+ encPeerFrom = GNUNET_strdup(GNUNET_i2s(peer));
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Receives %s message!\n", "dv", "DV GOSSIP");
+ "%s: Received %s message from peer %s about peer %s id %u distance %d!\n", GNUNET_i2s(&my_identity), "DV GOSSIP", encPeerFrom, encPeerAbout, ntohl(enc_message->neighbor_id), ntohl (enc_message->cost) + 1);
+ GNUNET_free(encPeerAbout);
+ GNUNET_free(encPeerFrom);
#endif
+
+ referrer = GNUNET_CONTAINER_multihashmap_get (direct_neighbors,
+ &peer->hashPubKey);
+ if (referrer == NULL)
+ return GNUNET_OK;
+
+ addUpdateNeighbor (&enc_message->neighbor, &enc_message->pkey,
+ ntohl (enc_message->neighbor_id),
+ referrer, ntohl (enc_message->cost) + 1);
+
+ return GNUNET_OK;
}
/**
- * Service server's handler for message send requests (which come
- * bubbling up to us through the DV plugin).
+ * Iterate over all currently known peers, add them to the
+ * fast gossip list for this peer so we get DV routing information
+ * out as fast as possible!
*
- * @param cls closure
- * @param client identification of the client
- * @param message the actual message
+ * @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
*/
-void send_dv_message (void *cls,
- struct GNUNET_SERVER_Client * client,
- const struct GNUNET_MessageHeader * message)
+static int add_all_extended_peers (void *cls,
+ const GNUNET_HashCode * key,
+ void *value)
{
-#if DEBUG_DV
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Receives %s message!\n", "dv", "SEND");
+ 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;
}
+#if INSANE_GOSSIP
/**
- * List of handlers for the messages understood by this
- * service.
+ * Iterator over hash map entries.
*
- * Hmm... will we need to register some handlers with core and
- * some handlers with our server here? Because core should be
- * getting the incoming DV messages (from whichever lower level
- * transport) and then our server should be getting messages
- * from the dv_plugin, right?
+ * @param 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.
*/
-static struct GNUNET_SERVER_MessageHandler core_handlers[] = {
- {&handle_dv_data_message, NULL, GNUNET_MESSAGE_TYPE_DV_DATA, 0},
- {&handle_dv_gossip_message, NULL, GNUNET_MESSAGE_TYPE_DV_GOSSIP, 0},
- {NULL, NULL, 0, 0}
-};
+static int gossip_all_to_all_iterator (void *cls,
+ const GNUNET_HashCode * key,
+ void *value)
+{
+ struct DirectNeighbor *direct = value;
-static struct GNUNET_SERVER_MessageHandler plugin_handlers[] = {
- {&send_dv_message, NULL, GNUNET_MESSAGE_TYPE_TRANSPORT_DV_SEND, 0},
- {NULL, NULL, 0, 0}
-};
+ GNUNET_CONTAINER_multihashmap_iterate (extended_neighbors, &add_all_extended_peers, direct->send_context);
+
+ if (direct->send_context->task != GNUNET_SCHEDULER_NO_TASK)
+ GNUNET_SCHEDULER_cancel(sched, direct->send_context->task);
+ direct->send_context->task = GNUNET_SCHEDULER_add_now(sched, &neighbor_send_task, direct->send_context);
+ return GNUNET_YES;
+}
/**
* Task run during shutdown.
* @param tc unused
*/
static void
-shutdown_task (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+gossip_all_to_all (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
{
+ GNUNET_CONTAINER_multihashmap_iterate (direct_neighbors, &gossip_all_to_all_iterator, NULL);
- GNUNET_CORE_disconnect (coreAPI);
-}
+ GNUNET_SCHEDULER_add_delayed (sched,
+ GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 5),
+ &gossip_all_to_all,
+ NULL);
+}
+#endif
/**
- * To be called on core init/fail.
+ * 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
*/
-void core_init (void *cls,
- struct GNUNET_CORE_Handle * server,
- const struct GNUNET_PeerIdentity *my_identity,
- const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded * publicKey)
+static int add_all_direct_neighbors (void *cls,
+ const 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;
- if (server == NULL)
+
+ distant = GNUNET_CONTAINER_multihashmap_get(extended_neighbors, &to->identity.hashPubKey);
+ if (distant == NULL)
{
- GNUNET_SCHEDULER_cancel(sched, cleanup_task);
- GNUNET_SCHEDULER_add_now(sched, &shutdown_task, NULL);
+ return GNUNET_YES;
+ }
+
+ if (memcmp(&direct->identity, &to->identity, sizeof(struct GNUNET_PeerIdentity)) == 0)
+ {
+ return GNUNET_YES; /* Don't gossip to a peer about itself! */
}
+
+#if SUPPORT_HIDING
+ if (distant->hidden == GNUNET_YES)
+ return GNUNET_YES; /* This peer should not be gossipped about (hidden) */
+#endif
+ direct_id = GNUNET_strdup(GNUNET_i2s(&direct->identity));
+#if DEBUG_DV_GOSSIP
+ GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: adding peer %s to fast send list for %s\n", my_short_id, GNUNET_i2s(&distant->identity), direct_id);
+#endif
+ GNUNET_free(direct_id);
+ gossip_entry = GNUNET_malloc(sizeof(struct FastGossipNeighborList));
+ gossip_entry->about = distant;
+
+ GNUNET_CONTAINER_DLL_insert_after(send_context->fast_gossip_list_head,
+ send_context->fast_gossip_list_tail,
+ send_context->fast_gossip_list_tail,
+ gossip_entry);
+ if (send_context->task != GNUNET_SCHEDULER_NO_TASK)
+ GNUNET_SCHEDULER_cancel(sched, send_context->task);
+
+ send_context->task = GNUNET_SCHEDULER_add_now(sched, &neighbor_send_task, send_context);
+ //tc.reason = GNUNET_SCHEDULER_REASON_TIMEOUT;
+ //neighbor_send_task(send_context, &tc);
+ return GNUNET_YES;
+}
+
+/**
+ * Type of an iterator over the hosts. Note that each
+ * host will be called with each available protocol.
+ *
+ * @param cls closure
+ * @param peer id of the peer, NULL for last call
+ * @param hello hello message for the peer (can be NULL)
+ * @param trust amount of trust we have in the peer
+ */
+static void
+process_peerinfo (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ const struct GNUNET_HELLO_Message *hello, uint32_t trust)
+{
+ struct PeerIteratorContext *peerinfo_iterator = cls;
+ struct DirectNeighbor *neighbor = peerinfo_iterator->neighbor;
+ struct DistantNeighbor *distant = peerinfo_iterator->distant;
+#if DEBUG_DV_PEER_NUMBERS
+ char *neighbor_pid;
+#endif
+ int sent;
+
+ if (peer == NULL) /* && (neighbor->pkey == NULL))*/
+ {
+ if (distant->pkey == NULL) /* FIXME: Reschedule? */
+ {
#if DEBUG_DV
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Core initialized, I am peer: %s\n", "dv", GNUNET_i2s(my_identity));
+ GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Failed to get peerinfo information for this peer, retrying!\n");
#endif
- coreAPI = server;
+ peerinfo_iterator->ic = GNUNET_PEERINFO_iterate(peerinfo_handle,
+ &peerinfo_iterator->neighbor->identity,
+ 0,
+ GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 3),
+ &process_peerinfo,
+ peerinfo_iterator);
+ }
+ else
+ {
+ GNUNET_free(peerinfo_iterator);
+ }
+ return;
+ }
+
+ if (memcmp(&neighbor->identity, peer, sizeof(struct GNUNET_PeerIdentity) != 0))
+ return;
+
+ if ((hello != NULL) && (GNUNET_HELLO_get_key (hello, &neighbor->pkey) == GNUNET_OK))
+ {
+ if (distant->pkey == NULL)
+ {
+ distant->pkey = GNUNET_malloc(sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
+ memcpy(distant->pkey, &neighbor->pkey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
+ }
+
+ /* Why do it this way, now we have the distant neighbor! */
+ /*GNUNET_CONTAINER_multihashmap_get_multiple(extended_neighbors,
+ &peer->hashPubKey,
+ &add_pkey_to_extended,
+ &neighbor->pkey);*/
+
+ sent = GNUNET_CONTAINER_multihashmap_iterate (extended_neighbors, &add_all_extended_peers, neighbor->send_context);
+
+#if DEBUG_DV_PEER_NUMBERS
+ neighbor_pid = GNUNET_strdup(GNUNET_i2s(&neighbor->identity));
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Gossipped %d extended peers to %s\n", GNUNET_i2s(&my_identity), sent, neighbor_pid);
+#endif
+ sent = GNUNET_CONTAINER_multihashmap_iterate (direct_neighbors, &add_all_direct_neighbors, neighbor);
+#if DEBUG_DV_PEER_NUMBERS
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Gossipped about %s to %d direct peers\n", GNUNET_i2s(&my_identity), neighbor_pid, sent);
+ GNUNET_free(neighbor_pid);
+#endif
+ neighbor->send_context->task = GNUNET_SCHEDULER_add_now(sched, &neighbor_send_task, neighbor->send_context);
+ }
}
+
/**
- * Method called whenever a given peer either connects.
+ * Method called whenever a peer connects.
*
* @param cls closure
* @param peer peer identity this notification is about
- * @param latency reported latency of the connection with 'other'
- * @param distance reported distance (DV) to 'other'
+ * @param latency reported latency of the connection with peer
+ * @param distance reported distance (DV) to peer
*/
void handle_core_connect (void *cls,
const struct GNUNET_PeerIdentity * peer,
struct GNUNET_TIME_Relative latency,
uint32_t distance)
{
-
+ struct DirectNeighbor *neighbor;
+ struct DistantNeighbor *about;
+ struct PeerIteratorContext *peerinfo_iterator;
+ int sent;
#if DEBUG_DV
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Receives core connect message!\n", "dv");
+ "%s: Receives core connect message for peer %s distance %d!\n", "dv", GNUNET_i2s(peer), distance);
#endif
+
+ if ((distance == DIRECT_NEIGHBOR_COST) && (GNUNET_CONTAINER_multihashmap_get(direct_neighbors, &peer->hashPubKey) == NULL))
+ {
+ peerinfo_iterator = GNUNET_malloc(sizeof(struct PeerIteratorContext));
+ neighbor = GNUNET_malloc (sizeof (struct DirectNeighbor));
+ neighbor->send_context = GNUNET_malloc(sizeof(struct NeighborSendContext));
+ neighbor->send_context->toNeighbor = neighbor;
+ memcpy (&neighbor->identity, peer, sizeof (struct GNUNET_PeerIdentity));
+
+ GNUNET_assert(GNUNET_SYSERR != GNUNET_CONTAINER_multihashmap_put (direct_neighbors,
+ &peer->hashPubKey,
+ neighbor, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
+ about = addUpdateNeighbor (peer, NULL, 0, neighbor, DIRECT_NEIGHBOR_COST);
+ peerinfo_iterator->distant = about;
+ peerinfo_iterator->neighbor = neighbor;
+ peerinfo_iterator->ic = GNUNET_PEERINFO_iterate (peerinfo_handle,
+ peer,
+ 0,
+ GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 3),
+ &process_peerinfo,
+ peerinfo_iterator);
+
+ if ((about != NULL) && (about->pkey == NULL))
+ {
+#if DEBUG_DV
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Newly added peer %s has NULL pkey!\n", GNUNET_i2s(peer));
+#endif
+ }
+ else if (about != NULL)
+ {
+ GNUNET_free(peerinfo_iterator);
+ }
+ }
+ else
+ {
+ about = GNUNET_CONTAINER_multihashmap_get(extended_neighbors, &peer->hashPubKey);
+ if ((GNUNET_CONTAINER_multihashmap_get(direct_neighbors, &peer->hashPubKey) == NULL) && (about != NULL))
+ sent = GNUNET_CONTAINER_multihashmap_iterate(direct_neighbors, &add_distant_all_direct_neighbors, about);
+#if DEBUG_DV
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: Distance (%d) greater than %d or already know about peer (%s), not re-adding!\n", "dv", distance, DIRECT_NEIGHBOR_COST, GNUNET_i2s(peer));
+#endif
+ return;
+ }
}
/**
- * Method called whenever a given peer either connects.
+ * Method called whenever a given peer disconnects.
*
* @param cls closure
* @param peer peer identity this notification is about
- * @param latency reported latency of the connection with 'other'
- * @param distance reported distance (DV) to 'other'
*/
void handle_core_disconnect (void *cls,
- const struct GNUNET_PeerIdentity * peer,
- struct GNUNET_TIME_Relative latency,
- uint32_t distance)
+ const struct GNUNET_PeerIdentity * peer)
{
+ struct DirectNeighbor *neighbor;
+ struct DistantNeighbor *referee;
+ struct FindDestinationContext fdc;
+ struct DisconnectContext disconnect_context;
+
#if DEBUG_DV
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Receives core disconnect message!\n", "dv");
+ "%s: Receives core peer disconnect message!\n", "dv");
#endif
+
+ neighbor =
+ GNUNET_CONTAINER_multihashmap_get (direct_neighbors, &peer->hashPubKey);
+ if (neighbor == NULL)
+ {
+ return;
+ }
+ while (NULL != (referee = neighbor->referee_head))
+ distant_neighbor_free (referee);
+
+ fdc.dest = NULL;
+ fdc.tid = 0;
+
+ GNUNET_CONTAINER_multihashmap_iterate (extended_neighbors, &find_distant_peer, &fdc);
+
+ if (fdc.dest != NULL)
+ {
+ disconnect_context.direct = neighbor;
+ disconnect_context.distant = fdc.dest;
+ GNUNET_CONTAINER_multihashmap_iterate (direct_neighbors, &schedule_disconnect_messages, &disconnect_context);
+ }
+
+ GNUNET_assert (neighbor->referee_tail == NULL);
+ if (GNUNET_NO == GNUNET_CONTAINER_multihashmap_remove (direct_neighbors,
+ &peer->hashPubKey, neighbor))
+ {
+ GNUNET_break(0);
+ }
+ if ((neighbor->send_context != NULL) && (neighbor->send_context->task != GNUNET_SCHEDULER_NO_TASK))
+ GNUNET_SCHEDULER_cancel(sched, neighbor->send_context->task);
+ GNUNET_free (neighbor);
}
* Process dv requests.
*
* @param cls closure
- * @param sched scheduler to use
+ * @param scheduler scheduler to use
* @param server the initialized server
* @param c configuration to use
*/
struct GNUNET_SERVER_Handle *server,
const struct GNUNET_CONFIGURATION_Handle *c)
{
- struct GNUNET_TIME_Relative timeout;
+ unsigned long long max_hosts;
sched = scheduler;
cfg = c;
+
+ /* FIXME: Read from config, or calculate, or something other than this! */
+ max_hosts = DEFAULT_DIRECT_CONNECTIONS;
+ max_table_size = DEFAULT_DV_SIZE;
+ fisheye_depth = DEFAULT_FISHEYE_DEPTH;
+
+ if (GNUNET_CONFIGURATION_have_value(cfg, "dv", "max_direct_connections"))
+ GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "dv", "max_direct_connections", &max_hosts));
+
+ if (GNUNET_CONFIGURATION_have_value(cfg, "dv", "max_total_connections"))
+ GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "dv", "max_total_connections", &max_table_size));
+
+
+ if (GNUNET_CONFIGURATION_have_value(cfg, "dv", "fisheye_depth"))
+ GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "dv", "fisheye_depth", &fisheye_depth));
+
+ neighbor_min_heap =
+ GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
+ neighbor_max_heap =
+ GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MAX);
+
+ direct_neighbors = GNUNET_CONTAINER_multihashmap_create (max_hosts);
+ extended_neighbors =
+ GNUNET_CONTAINER_multihashmap_create (max_table_size * 3);
+
GNUNET_SERVER_add_handlers (server, plugin_handlers);
coreAPI =
GNUNET_CORE_connect (sched,
cfg,
- timeout,
+ GNUNET_TIME_relative_get_forever(),
NULL, /* FIXME: anything we want to pass around? */
&core_init,
- NULL, /* Don't care about pre-connects */
&handle_core_connect,
&handle_core_disconnect,
NULL,
+ GNUNET_NO,
NULL,
- NULL,
- NULL,
+ GNUNET_NO,
core_handlers);
if (coreAPI == NULL)
return;
- /* load (server); Huh? */
- /* Scheduled the task to clean up when shutdown is called */
+ coreMST = GNUNET_SERVER_mst_create (GNUNET_SERVER_MAX_MESSAGE_SIZE,
+ &tokenized_message_handler,
+ NULL);
+
+ peerinfo_handle = GNUNET_PEERINFO_connect(sched, cfg);
+ if (peerinfo_handle == NULL)
+ {
+ GNUNET_CORE_disconnect(coreAPI);
+ return;
+ }
+
+ /* Scheduled the task to clean up when shutdown is called */
cleanup_task = GNUNET_SCHEDULER_add_delayed (sched,
GNUNET_TIME_UNIT_FOREVER_REL,
&shutdown_task,
NULL);
+#if INSANE_GOSSIP
+ GNUNET_SCHEDULER_add_delayed (sched,
+ GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 5),
+ &gossip_all_to_all,
+ NULL);
+#endif
}
projects / oweals / gnunet.git / blobdiff