1 files changed, 138 insertions, 0 deletions

diff --git a/src/dht/gnunet-service-wdht_routing.h b/src/dht/gnunet-service-wdht_routing.h
new file mode 100644
index 000000000..5292ec2ce
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+++ b/src/dht/gnunet-service-wdht_routing.h
@@ -0,0 +1,138 @@
+/*
+     This file is part of GNUnet.
+     Copyright (C) 2011 - 2014 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 3, 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 dht/gnunet-service-xdht_routing.h
+ * @brief GNUnet DHT tracking of requests for routing replies
+ * @author Christian Grothoff
+ */
+#ifndef GNUNET_SERVICE_XDHT_ROUTING_H
+#define GNUNET_SERVICE_XDHT_ROUTING_H
+
+#include "gnunet_util_lib.h"
+#include "gnunet_block_lib.h"
+#include "gnunet_dht_service.h"
+
+/**
+ * To understand the direction in which trial should be read. 
+ */
+enum GDS_ROUTING_trail_direction 
+{
+  GDS_ROUTING_SRC_TO_DEST,
+  GDS_ROUTING_DEST_TO_SRC
+};
+
+
+/**
+ * Update the prev. hop of the trail. Call made by trail teardown where
+ * if you are the first friend now in the trail then you need to update
+ * your prev. hop.
+ * @param trail_id
+ * @return #GNUNET_OK success
+ *         #GNUNET_SYSERR in case no matching entry found in routing table. 
+ */
+int
+GDS_ROUTING_update_trail_prev_hop (struct GNUNET_HashCode trail_id,
+                                   struct GNUNET_PeerIdentity prev_hop);
+
+
+/**
+ * Update the next hop of the trail. Call made by trail compression where
+ * if you are source of the trail and now you have a new first friend, then
+ * you should update the trail. 
+ * @param trail_id
+ * @return #GNUNET_OK success
+ *         #GNUNET_SYSERR in case no matching entry found in routing table.
+ */
+int
+GDS_ROUTING_update_trail_next_hop (const struct GNUNET_HashCode trail_id,
+                                   struct GNUNET_PeerIdentity next_hop);
+
+/**
+ * Get the next hop for trail corresponding to trail_id
+ * @param trail_id Trail id to be searched. 
+ * @return Next_hop if found
+ *         NULL If next hop not found. 
+ */
+struct GNUNET_PeerIdentity *
+GDS_ROUTING_get_next_hop (struct GNUNET_HashCode trail_id,
+                          enum GDS_ROUTING_trail_direction trail_direction);
+
+
+/**
+  * Remove every trail where peer is either next_hop or prev_hop 
+ * @param peer Peer to be searched.
+ */
+int
+GDS_ROUTING_remove_trail_by_peer (const struct GNUNET_PeerIdentity *peer);
+/**
+ * Remove trail with trail_id
+ * @param trail_id Trail id to be removed
+ * @return #GNUNET_YES success 
+ *         #GNUNET_NO if entry not found.
+ */
+int
+GDS_ROUTING_remove_trail (struct GNUNET_HashCode remove_trail_id);
+
+
+/**
+ * Add a new entry in routing table
+ * @param new_trail_id
+ * @param prev_hop
+ * @param next_hop
+ * @return #GNUNET_OK success
+ *         #GNUNET_SYSERR in case new_trail_id already exists in the network
+ *                         but with different prev_hop/next_hop
+ */
+int
+GDS_ROUTING_add (struct GNUNET_HashCode new_trail_id, 
+                 struct GNUNET_PeerIdentity prev_hop,
+                 struct GNUNET_PeerIdentity next_hop);
+
+
+/**
+ * Check if the size of routing table has crossed threshold. 
+ * @return #GNUNET_YES, if threshold crossed 
+ *         #GNUNET_NO, if size is within threshold 
+ */
+int
+GDS_ROUTING_threshold_reached (void);
+
+#if 0
+/**
+ * Test function. Remove afterwards. 
+ */
+void 
+GDS_ROUTING_test_print (void);
+#endif
+
+/**
+ * Initialize routing subsystem.
+ */
+void
+GDS_ROUTING_init (void);
+
+/**
+ * Shutdown routing subsystem.
+ */
+void
+GDS_ROUTING_done (void);
+
+#endif
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