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diff --git a/src/dht/gnunet-service-xdht_routing.h b/src/dht/gnunet-service-xdht_routing.h
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1/*
2 This file is part of GNUnet.
3 Copyright (C) 2011 - 2014 GNUnet e.V.
4
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
9
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 Boston, MA 02110-1301, USA.
19*/
20
21/**
22 * @file dht/gnunet-service-xdht_routing.h
23 * @brief GNUnet DHT tracking of requests for routing replies
24 * @author Christian Grothoff
25 */
26#ifndef GNUNET_SERVICE_XDHT_ROUTING_H
27#define GNUNET_SERVICE_XDHT_ROUTING_H
28
29#include "gnunet_util_lib.h"
30#include "gnunet_block_lib.h"
31#include "gnunet_dht_service.h"
32
33/**
34 * To understand the direction in which trial should be read.
35 */
36enum GDS_ROUTING_trail_direction
37{
38 GDS_ROUTING_SRC_TO_DEST,
39 GDS_ROUTING_DEST_TO_SRC
40};
41
42
43/**
44 * Update the prev. hop of the trail. Call made by trail teardown where
45 * if you are the first friend now in the trail then you need to update
46 * your prev. hop.
47 * @param trail_id
48 * @return #GNUNET_OK success
49 * #GNUNET_SYSERR in case no matching entry found in routing table.
50 */
51int
52GDS_ROUTING_update_trail_prev_hop (const struct GNUNET_HashCode *trail_id,
53 const struct GNUNET_PeerIdentity *prev_hop);
54
55
56/**
57 * Update the next hop of the trail. Call made by trail compression where
58 * if you are source of the trail and now you have a new first friend, then
59 * you should update the trail.
60 * @param trail_id
61 * @return #GNUNET_OK success
62 * #GNUNET_SYSERR in case no matching entry found in routing table.
63 */
64int
65GDS_ROUTING_update_trail_next_hop (const struct GNUNET_HashCode *trail_id,
66 const struct GNUNET_PeerIdentity *next_hop);
67
68/**
69 * Get the next hop for trail corresponding to trail_id
70 * @param trail_id Trail id to be searched.
71 * @return Next_hop if found
72 * NULL If next hop not found.
73 */
74const struct GNUNET_PeerIdentity *
75GDS_ROUTING_get_next_hop (const struct GNUNET_HashCode *trail_id,
76 enum GDS_ROUTING_trail_direction trail_direction);
77
78
79/**
80 * Remove every trail where peer is either next_hop or prev_hop
81 * @param peer Peer to be searched.
82 */
83int
84GDS_ROUTING_remove_trail_by_peer (const struct GNUNET_PeerIdentity *peer);
85
86
87/**
88 * Remove trail with trail_id
89 *
90 * @param trail_id Trail id to be removed
91 * @return #GNUNET_YES success
92 * #GNUNET_NO if entry not found.
93 */
94int
95GDS_ROUTING_remove_trail (const struct GNUNET_HashCode *remove_trail_id);
96
97
98/**
99 * Add a new entry in routing table
100 * @param new_trail_id
101 * @param prev_hop
102 * @param next_hop
103 * @return #GNUNET_OK success
104 * #GNUNET_SYSERR in case new_trail_id already exists in the network
105 * but with different prev_hop/next_hop
106 */
107int
108GDS_ROUTING_add (const struct GNUNET_HashCode *new_trail_id,
109 const struct GNUNET_PeerIdentity *prev_hop,
110 const struct GNUNET_PeerIdentity *next_hop);
111
112
113/**
114 * Check if the size of routing table has crossed threshold.
115 * @return #GNUNET_YES, if threshold crossed
116 * #GNUNET_NO, if size is within threshold
117 */
118int
119GDS_ROUTING_threshold_reached (void);
120
121#if 0
122/**
123 * Test function. Remove afterwards.
124 */
125void
126GDS_ROUTING_test_print (void);
127#endif
128
129/**
130 * Initialize routing subsystem.
131 */
132void
133GDS_ROUTING_init (void);
134
135/**
136 * Shutdown routing subsystem.
137 */
138void
139GDS_ROUTING_done (void);
140
141#endif