/*
This file is part of GNUnet.
- (C) 2011 Christian Grothoff (and other contributing authors)
+ (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
#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
+};
+
/**
- * Add a new entry to our routing table.
-*/
+ * 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_add (struct GNUNET_PeerIdentity *source,
- struct GNUNET_PeerIdentity *destination_peer,
- struct GNUNET_PeerIdentity *next_hop,
- const struct GNUNET_PeerIdentity *prev_hop);
-
+GDS_ROUTING_update_trail_prev_hop (struct GNUNET_HashCode trail_id,
+ struct GNUNET_PeerIdentity prev_hop);
/**
- * Search the next hop to send the packet to in routing table.
- * @return next hop peer id
+ * 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_search(struct GNUNET_PeerIdentity *source_peer,
- struct GNUNET_PeerIdentity *destination_peer,
- const struct GNUNET_PeerIdentity *prev_hop);
+GDS_ROUTING_get_next_hop (struct GNUNET_HashCode trail_id,
+ enum GDS_ROUTING_trail_direction trail_direction);
+
/**
- * Handle a reply (route to origin). Only forwards the reply back to
- * other peers waiting for it. Does not do local caching or
- * forwarding to local clients. Essentially calls
- * GDS_NEIGHBOURS_handle_reply for all peers that sent us a matching
- * request recently.
- *
- * @param type type of the block
- * @param expiration_time when does the content expire
- * @param key key for the content
- * @param put_path_length number of entries in @a put_path
- * @param put_path peers the original PUT traversed (if tracked)
- * @param get_path_length number of entries in @a get_path
- * @param get_path peers this reply has traversed so far (if tracked)
- * @param data payload of the reply
- * @param data_size number of bytes in @a data
+ * Remove every trail where peer is either next_hop or prev_hop
+ * @param peer Peer to be searched.
*/
void
-GDS_ROUTING_process (enum GNUNET_BLOCK_Type type,
- struct GNUNET_TIME_Absolute expiration_time,
- const struct GNUNET_HashCode * key, unsigned int put_path_length,
- const struct GNUNET_PeerIdentity *put_path,
- unsigned int get_path_length,
- const struct GNUNET_PeerIdentity *get_path,
- const void *data, size_t data_size);
+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);
+
/**
* Initialize routing subsystem.
void
GDS_ROUTING_init (void);
-
/**
* Shutdown routing subsystem.
*/
void
GDS_ROUTING_done (void);
-
-#endif
+#endif
\ No newline at end of file