stuff

1 files changed, 202 insertions, 0 deletions

diff --git a/src/transport/gnunet-service-transport_blacklist.c b/src/transport/gnunet-service-transport_blacklist.c
new file mode 100644
index 000000000..a1b13f33e
--- /dev/null
+++ b/src/transport/gnunet-service-transport_blacklist.c
@@ -0,0 +1,202 @@
+/*
+     This file is part of GNUnet.
+     (C) 2010 Christian Grothoff (and other contributing authors)
+
+     GNUnet is free software; you can redistribute it and/or modify
+     it under the terms of the GNU General Public License as published
+     by the Free Software Foundation; either version 2, or (at your
+     option) any later version.
+
+     GNUnet is distributed in the hope that it will be useful, but
+     WITHOUT ANY WARRANTY; without even the implied warranty of
+     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+     General Public License for more details.
+
+     You should have received a copy of the GNU General Public License
+     along with GNUnet; see the file COPYING.  If not, write to the
+     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+     Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file transport/gnunet-service-transport_blacklist.c
+ * @brief low-level P2P messaging
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "gnunet_protocols.h"
+#include "gnunet_service_lib.h"
+#include "transport.h"
+#include "gnunet-service-transport_blacklist.h"
+
+
+/**
+ * Information kept for each blacklisted peer.
+ */
+struct BlacklistEntry
+{
+  /**
+   * How long until this entry times out?
+   */
+  struct GNUNET_TIME_Absolute until;
+
+  /**
+   * Task scheduled to run the moment the time does run out.
+   */
+  GNUNET_SCHEDULER_TaskIdentifier timeout_task;
+};
+
+
+/**
+ * Entry in list of notifications still to transmit to
+ * a client.
+ */
+struct PendingNotificationList 
+{
+
+  /**
+   * This is a linked list.
+   */
+  struct PendingNotificationList *next;
+
+  /**
+   * Identity of the peer to send notification about.
+   */
+  struct GNUNET_PeerIdentity peer;
+
+};
+
+
+/**
+ * List of clients to notify whenever the blacklist changes.
+ */
+struct BlacklistNotificationList
+{
+
+  /**
+   * This is a linked list.
+   */
+  struct BlacklistNotificationList *next;
+
+  /**
+   * Client to notify.
+   */
+  struct GNUNET_SERVER_Client *client;
+
+  /**
+   * Pending request for transmission to client, or NULL.
+   */ 
+  struct GNUNET_CONNECTION_TransmitHandle *req;
+
+  /**
+   * Blacklist entries that still need to be submitted.
+   */
+  struct PendingNotificationList *pending;
+  
+};
+
+
+/**
+ * Map of blacklisted peers (maps from peer identities
+ * to 'struct BlacklistEntry*' values).
+ */
+static struct GNUNET_CONTAINER_MultiHashMap *blacklist;
+
+/**
+ * Linked list of clients to notify whenever the blacklist changes.
+ */
+static struct BlacklistNotificationList *blacklist_notifiers;
+
+/**
+ * Our scheduler.
+ */
+static struct GNUNET_SCHEDULER_Handle *sched;
+
+
+/**
+ * Free the entries in the blacklist hash map.
+ *
+ * @param cls closure, unused
+ * @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
+free_blacklist_entry (void *cls,
+                      const GNUNET_HashCode *key,
+                      void *value)
+{
+  struct BlacklistEntry *be = value;
+
+  GNUNET_SCHEDULER_cancel (sched,
+                           be->timeout_task);
+  GNUNET_free (be);
+  return GNUNET_YES;
+}
+
+
+static void 
+shutdown_task (void *cls,
+               const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+  GNUNET_CONTAINER_multihashmap_iterate (blacklist,
+                                         &free_blacklist_entry,
+                                         NULL);
+  GNUNET_CONTAINER_multihashmap_destroy (blacklist);
+}
+
+
+/**
+ * Handle a request to blacklist a peer.
+ */
+void
+GNUNET_TRANSPORT_handle_blacklist (void *cls,
+                                   struct GNUNET_SERVER_Client *client,
+                                   const struct GNUNET_MessageHeader *message)
+{
+}
+
+
+/**
+ * Handle a request for notification of blacklist changes.
+ */
+void
+GNUNET_TRANSPORT_handle_blacklist_notify (void *cls,
+                                          struct GNUNET_SERVER_Client *client,
+                                          const struct GNUNET_MessageHeader *message)
+{
+}
+
+
+/**
+ * Is the given peer currently blacklisted?
+ *
+ * @param id identity of the peer
+ * @return GNUNET_YES if the peer is blacklisted, GNUNET_NO if not
+ */
+int
+GNUNET_TRANSPORT_blacklist_check (const struct GNUNET_PeerIdentity *id)
+{
+  return GNUNET_CONTAINER_multihashmap_contains (blacklist, &id->hashPubKey);
+}
+
+
+/**
+ * Initialize the blacklisting subsystem.
+ *
+ * @param s scheduler to use
+ */
+void 
+GNUNET_TRANSPORT_blacklist_init (struct GNUNET_SCHEDULER_Handle *s)
+{
+  sched = s;
+  blacklist = GNUNET_CONTAINER_multihashmap_create (4);
+  GNUNET_SCHEDULER_add_delayed (sched,
+                                GNUNET_TIME_UNIT_FOREVER_REL,
+                                &shutdown_task,
+                                NULL);
+}
+
+/* end of gnunet-service-transport_blacklist.c */