};
+/**
+ * Struct containing paremeters of monitoring requests.
+ */
+struct ClientMonitorRecord
+{
+
+ /**
+ * Next element in DLL.
+ */
+ struct ClientMonitorRecord *next;
+
+ /**
+ * Previous element in DLL.
+ */
+ struct ClientMonitorRecord *prev;
+
+ /**
+ * Type of blocks that are of interest
+ */
+ enum GNUNET_BLOCK_Type type;
+
+ /**
+ * Key of data of interest, NULL for all.
+ */
+ GNUNET_HashCode *key;
+
+ /**
+ * Client to notify of these requests.
+ */
+ struct ClientList *client;
+};
+
+
/**
* List of active clients.
*/
*/
static struct ClientList *client_tail;
+/**
+ * List of active monitoring requests.
+ */
+static struct ClientMonitorRecord *monitor_head;
+
+/**
+ * List of active monitoring requests..
+ */
+static struct ClientMonitorRecord *monitor_tail;
+
/**
* Hashmap for fast key based lookup, maps keys to 'struct ClientQueryRecord' entries.
*/
{
struct ClientList *pos;
struct PendingMessage *reply;
+ struct ClientMonitorRecord *monitor;
#if DEBUG_DHT
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Local client %p disconnects\n", client);
GNUNET_CONTAINER_DLL_remove (pos->pending_head, pos->pending_tail, reply);
GNUNET_free (reply);
}
+ monitor = monitor_head;
+ while (NULL != monitor)
+ {
+ if (monitor->client == pos)
+ {
+ struct ClientMonitorRecord *next;
+
+ GNUNET_free_non_null (monitor->key);
+ next = monitor->next;
+ GNUNET_CONTAINER_DLL_remove (monitor_head, monitor_tail, monitor);
+ GNUNET_free (monitor);
+ monitor = next;
+ }
+ else
+ monitor = monitor->next;
+ }
GNUNET_CONTAINER_multihashmap_iterate (forward_map, &remove_client_records,
pos);
GNUNET_free (pos);
}
+/**
+ * Handler for monitor messages
+ *
+ * @param cls closure for the service
+ * @param client the client we received this message from
+ * @param message the actual message received
+ *
+ */
+static void
+handle_dht_local_monitor (void *cls, struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ struct ClientMonitorRecord *r;
+ const struct GNUNET_DHT_MonitorMessage *msg;
+ unsigned int i;
+ char *c;
+
+ msg = (struct GNUNET_DHT_MonitorMessage *) message;
+ r = GNUNET_malloc (sizeof(struct ClientMonitorRecord));
+
+ r->client = find_active_client(client);
+ r->type = ntohl(msg->type);
+ c = (char *) &msg->key;
+ for (i = 0; i < sizeof (GNUNET_HashCode) && c[i] == 0; i++);
+ if (sizeof (GNUNET_HashCode) == i)
+ r->key = NULL;
+ else
+ {
+ r->key = GNUNET_malloc (sizeof (GNUNET_HashCode));
+ memcpy (r->key, &msg->key, sizeof (GNUNET_HashCode));
+ }
+ GNUNET_CONTAINER_DLL_insert (monitor_head, monitor_tail, r);
+ // FIXME add remove somewhere
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+}
+
+
/**
* Task run to check for messages that need to be sent to a client.
*
}
+/**
+ * Check if some client is monitoring messages of this type and notify
+ * him in that case.
+ *
+ * @param mtype Type of the DHT message.
+ * @param exp When will this value expire.
+ * @param key Key of the result/request.
+ * @param get_path Peers on reply path (or NULL if not recorded).
+ * @param get_path_length number of entries in get_path.
+ * @param put_path peers on the PUT path (or NULL if not recorded).
+ * @param put_path_length number of entries in get_path.
+ * @param desired_replication_level Desired replication level.
+ * @param type Type of the result/request.
+ * @param data Pointer to the result data.
+ * @param size Number of bytes in data.
+ */
+void
+GDS_CLIENTS_process_monitor (uint16_t mtype,
+ const struct GNUNET_TIME_Absolute exp,
+ const GNUNET_HashCode *key,
+ uint32_t putl,
+ const struct GNUNET_PeerIdentity *put_path,
+ uint32_t getl,
+ const struct GNUNET_PeerIdentity *get_path,
+ uint32_t replevel,
+ enum GNUNET_BLOCK_Type type,
+ const struct GNUNET_MessageHeader *data,
+ uint16_t size)
+{
+ struct ClientMonitorRecord *m;
+ struct ClientList **cl;
+ unsigned int cl_size;
+
+ cl = NULL;
+ cl_size = 0;
+ for (m = monitor_head; NULL != m; m = m->next)
+ {
+ if ((GNUNET_BLOCK_TYPE_ANY == m->type || m->type == type) &&
+ (NULL == m->key ||
+ memcmp (key, m->key, sizeof(GNUNET_HashCode)) == 0))
+ {
+ struct PendingMessage *pm;
+ struct GNUNET_DHT_MonitorMessage *mmsg;
+ struct GNUNET_PeerIdentity *path;
+ size_t msize;
+ unsigned int i;
+
+ /* Don't send duplicates */
+ for (i = 0; i < cl_size; i++)
+ if (cl[i] == m->client)
+ break;
+ if (i < cl_size)
+ continue;
+ GNUNET_array_append (cl, cl_size, m->client);
+
+ msize = size;
+ msize += (getl + putl) * sizeof (struct GNUNET_PeerIdentity);
+ msize += sizeof (struct GNUNET_DHT_MonitorMessage);
+ msize += sizeof (struct PendingMessage);
+ pm = (struct PendingMessage *) GNUNET_malloc (msize);
+ mmsg = (struct GNUNET_DHT_MonitorMessage *) &pm[1];
+ pm->msg = (struct GNUNET_MessageHeader *) mmsg;
+ mmsg->header.size = htons (msize - sizeof (struct PendingMessage));
+ mmsg->header.type = htons (mtype);
+ mmsg->expiration = GNUNET_TIME_absolute_hton(exp);
+ memcpy (&mmsg->key, key, sizeof (GNUNET_HashCode));
+ mmsg->put_path_length = htonl(putl);
+ mmsg->get_path_length = htonl(getl);
+ path = (struct GNUNET_PeerIdentity *) &mmsg[1];
+ if (putl > 0)
+ {
+ memcpy (path, put_path, putl * sizeof (struct GNUNET_PeerIdentity));
+ path = &path[putl];
+ }
+ if (getl > 0)
+ memcpy (path, get_path, getl * sizeof (struct GNUNET_PeerIdentity));
+ if (size > 0)
+ memcpy (&path[getl], data, size);
+ add_pending_message (m->client, pm);
+ }
+ }
+ GNUNET_free_non_null (cl);
+}
+
+
/**
* Initialize client subsystem.
*
{&handle_dht_local_get_stop, NULL,
GNUNET_MESSAGE_TYPE_DHT_CLIENT_GET_STOP,
sizeof (struct GNUNET_DHT_ClientGetStopMessage)},
+ {&handle_dht_local_monitor, NULL,
+ GNUNET_MESSAGE_TYPE_DHT_MONITOR_GET,
+ sizeof (struct GNUNET_DHT_MonitorMessage)},
{NULL, NULL, 0, 0}
};
forward_map = GNUNET_CONTAINER_multihashmap_create (1024);
projects / oweals / gnunet.git / blobdiff