summaryrefslogtreecommitdiffstats
path: root/third_party/libsrtp/src/test/roc_driver.c
blob: 439862039a462f63c6e02133fa2bdd935550b74a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
/*
 * roc_driver.c
 *
 * test driver for rollover counter replay implementation
 *
 * David A. McGrew
 * Cisco Systems, Inc.
 */

/*
 *
 * Copyright (c) 2001-2017, Cisco Systems, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 *   Redistributions in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following
 *   disclaimer in the documentation and/or other materials provided
 *   with the distribution.
 *
 *   Neither the name of the Cisco Systems, Inc. nor the names of its
 *   contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>

/*
 * defining ROC_TEST causes small datatypes to be used in
 * srtp_xtd_seq_num_t - this allows the functions to be exhaustively tested.
 */
#if ROC_NEEDS_TO_BE_TESTED
#define ROC_TEST
#endif

#include "rdbx.h"
#include "ut_sim.h"

srtp_err_status_t roc_test(int num_trials);

int main(void)
{
    srtp_err_status_t status;

    printf("rollover counter test driver\n"
           "David A. McGrew\n"
           "Cisco Systems, Inc.\n");

    printf("testing index functions...");
    status = roc_test(1 << 18);
    if (status) {
        printf("failed\n");
        exit(status);
    }
    printf("passed\n");
    return 0;
}

#define ROC_VERBOSE 0

srtp_err_status_t roc_test(int num_trials)
{
    srtp_xtd_seq_num_t local, est, ref;
    ut_connection utc;
    int i, num_bad_est = 0;
    int delta;
    uint32_t ircvd;
    double failure_rate;

    srtp_index_init(&local);
    srtp_index_init(&ref);
    srtp_index_init(&est);

    printf("\n\ttesting sequential insertion...");
    for (i = 0; i < 2048; i++) {
        srtp_index_guess(&local, &est, (uint16_t)ref);
#if ROC_VERBOSE
        printf("%lld, %lld, %d\n", ref, est, i);
#endif
        if (ref != est) {
#if ROC_VERBOSE
            printf(" *bad estimate*\n");
#endif
            ++num_bad_est;
        }
        srtp_index_advance(&ref, 1);
    }
    failure_rate = (double)num_bad_est / num_trials;
    if (failure_rate > 0.01) {
        printf("error: failure rate too high (%d bad estimates in %d trials)\n",
               num_bad_est, num_trials);
        return srtp_err_status_algo_fail;
    }
    printf("done\n");

    printf("\ttesting non-sequential insertion...");
    srtp_index_init(&local);
    srtp_index_init(&ref);
    srtp_index_init(&est);
    ut_init(&utc);

    for (i = 0; i < num_trials; i++) {
        /* get next seq num from unreliable transport simulator */
        ircvd = ut_next_index(&utc);

        /* set ref to value of ircvd */
        ref = ircvd;

        /* estimate index based on low bits of ircvd */
        delta = srtp_index_guess(&local, &est, (uint16_t)ref);
#if ROC_VERBOSE
        printf("ref: %lld, local: %lld, est: %lld, ircvd: %d, delta: %d\n", ref,
               local, est, ircvd, delta);
#endif

        if (local + delta != est) {
            printf(" *bad delta*: local %llu + delta %d != est %llu\n",
                   (unsigned long long)local, delta, (unsigned long long)est);
            return srtp_err_status_algo_fail;
        }

        /* now update local srtp_xtd_seq_num_t as necessary */
        if (delta > 0)
            srtp_index_advance(&local, delta);

        if (ref != est) {
#if ROC_VERBOSE
            printf(" *bad estimate*\n");
#endif
            /* record failure event */
            ++num_bad_est;

            /* reset local value to correct value */
            local = ref;
        }
    }
    failure_rate = (double)num_bad_est / num_trials;
    if (failure_rate > 0.01) {
        printf("error: failure rate too high (%d bad estimates in %d trials)\n",
               num_bad_est, num_trials);
        return srtp_err_status_algo_fail;
    }
    printf("done\n");

    return srtp_err_status_ok;
}