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-rw-r--r--src/rps/gnunet-service-rps_sampler_elem.c170
1 files changed, 0 insertions, 170 deletions
diff --git a/src/rps/gnunet-service-rps_sampler_elem.c b/src/rps/gnunet-service-rps_sampler_elem.c
deleted file mode 100644
index aa8b72445..000000000
--- a/src/rps/gnunet-service-rps_sampler_elem.c
+++ /dev/null
@@ -1,170 +0,0 @@
1/*
2 This file is part of GNUnet.
3 Copyright (C)
4
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your 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 Affero General Public License for more details.
14
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17
18 SPDX-License-Identifier: AGPL3.0-or-later
19 */
20
21/**
22 * @file rps/gnunet-service-rps_sampler.c
23 * @brief sampler implementation
24 * @author Julius Bünger
25 */
26#include "platform.h"
27#include "gnunet_util_lib.h"
28
29#include "gnunet-service-rps_sampler_elem.h"
30
31#include <inttypes.h>
32
33#include "rps-test_util.h"
34
35#define LOG(kind, ...) GNUNET_log_from (kind, "rps-sampler_elem", __VA_ARGS__)
36
37
38/***********************************************************************
39* WARNING: This section needs to be reviewed regarding the use of
40* functions providing (pseudo)randomness!
41***********************************************************************/
42
43
44/**
45 * Reinitialise a previously initialised sampler element.
46 *
47 * @param sampler_el The sampler element to (re-) initialise
48 */
49void
50RPS_sampler_elem_reinit (struct RPS_SamplerElement *sampler_elem)
51{
52 sampler_elem->is_empty = EMPTY;
53
54 // I guess I don't need to call GNUNET_CRYPTO_hmac_derive_key()...
55 GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_STRONG,
56 &(sampler_elem->auth_key.key),
57 GNUNET_CRYPTO_HASH_LENGTH);
58
59 sampler_elem->last_client_request = GNUNET_TIME_UNIT_FOREVER_ABS;
60
61 sampler_elem->birth = GNUNET_TIME_absolute_get ();
62 sampler_elem->num_peers = 0;
63 sampler_elem->num_change = 0;
64}
65
66
67/**
68 * Create a sampler element and initialise it.
69 *
70 * In this implementation this means choosing an auth_key for later use in
71 * a hmac at random.
72 *
73 * @return a newly created RPS_SamplerElement which currently holds no id.
74 */
75struct RPS_SamplerElement *
76RPS_sampler_elem_create (void)
77{
78 struct RPS_SamplerElement *s;
79
80 s = GNUNET_new (struct RPS_SamplerElement);
81
82 RPS_sampler_elem_reinit (s);
83
84 return s;
85}
86
87
88/**
89 * Destroy a sampler element.
90 *
91 * @param sampler_elem the element to destroy
92 */
93void
94RPS_sampler_elem_destroy (struct RPS_SamplerElement *sampler_elem)
95{
96 GNUNET_free (sampler_elem);
97}
98
99
100/**
101 * Update a sampler element with a PeerID
102 *
103 * @param sampler_elem The sampler element to update
104 * @param new_ID The PeerID to update with
105 */
106void
107RPS_sampler_elem_next (struct RPS_SamplerElement *sampler_elem,
108 const struct GNUNET_PeerIdentity *new_ID)
109{
110 struct GNUNET_HashCode other_hash;
111
112 sampler_elem->num_peers++;
113
114 if (0 == GNUNET_memcmp (new_ID, &(sampler_elem->peer_id)))
115 {
116 LOG (GNUNET_ERROR_TYPE_DEBUG, "Have already PeerID %s\n",
117 GNUNET_i2s (&(sampler_elem->peer_id)));
118 }
119 else
120 {
121 GNUNET_CRYPTO_hmac (&sampler_elem->auth_key,
122 new_ID,
123 sizeof(struct GNUNET_PeerIdentity),
124 &other_hash);
125
126 if (EMPTY == sampler_elem->is_empty)
127 {
128 LOG (GNUNET_ERROR_TYPE_DEBUG,
129 "Got PeerID %s; Simply accepting (was empty previously).\n",
130 GNUNET_i2s (new_ID));
131 sampler_elem->peer_id = *new_ID;
132 sampler_elem->peer_id_hash = other_hash;
133
134 sampler_elem->num_change++;
135 }
136 else if (0 > GNUNET_CRYPTO_hash_cmp (&other_hash,
137 &sampler_elem->peer_id_hash))
138 {
139 LOG (GNUNET_ERROR_TYPE_DEBUG, "Discarding old PeerID %s\n",
140 GNUNET_i2s (&sampler_elem->peer_id));
141 sampler_elem->peer_id = *new_ID;
142 sampler_elem->peer_id_hash = other_hash;
143
144 sampler_elem->num_change++;
145 }
146 else
147 {
148 LOG (GNUNET_ERROR_TYPE_DEBUG, "Keeping old PeerID %s\n",
149 GNUNET_i2s (&sampler_elem->peer_id));
150 }
151 }
152 sampler_elem->is_empty = NOT_EMPTY;
153}
154
155
156/**
157 * Set the min-wise independent function of the given sampler element.
158 *
159 * @param sampler_elem the sampler element
160 * @param auth_key the key to use
161 */
162void
163RPS_sampler_elem_set (struct RPS_SamplerElement *sampler_elem,
164 struct GNUNET_CRYPTO_AuthKey auth_key)
165{
166 sampler_elem->auth_key = auth_key;
167}
168
169
170/* end of gnunet-service-rps.c */
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-18 02:08:46 +0000