1/*
2 * roc_driver.c
3 *
4 * test driver for rollover counter replay implementation
5 *
6 * David A. McGrew
7 * Cisco Systems, Inc.
8 */
9
10/*
11 *
12 * Copyright (c) 2001-2006, Cisco Systems, Inc.
13 * All rights reserved.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 *
19 *   Redistributions of source code must retain the above copyright
20 *   notice, this list of conditions and the following disclaimer.
21 *
22 *   Redistributions in binary form must reproduce the above
23 *   copyright notice, this list of conditions and the following
24 *   disclaimer in the documentation and/or other materials provided
25 *   with the distribution.
26 *
27 *   Neither the name of the Cisco Systems, Inc. nor the names of its
28 *   contributors may be used to endorse or promote products derived
29 *   from this software without specific prior written permission.
30 *
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
34 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
35 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
36 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
37 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
38 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
41 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
42 * OF THE POSSIBILITY OF SUCH DAMAGE.
43 *
44 */
45
46
47#include <stdio.h>
48
49/*
50 * defining ROC_TEST causes small datatypes to be used in
51 * xtd_seq_num_t - this allows the functions to be exhaustively tested.
52 */
53#if ROC_NEEDS_TO_BE_TESTED
54#define ROC_TEST
55#endif
56
57#include "rdbx.h"
58#include "ut_sim.h"
59
60err_status_t
61roc_test(int num_trials);
62
63int
64main (void) {
65  err_status_t status;
66
67  printf("rollover counter test driver\n"
68	 "David A. McGrew\n"
69	 "Cisco Systems, Inc.\n");
70
71  printf("testing index functions...");
72  status = roc_test(1 << 18);
73  if (status) {
74    printf("failed\n");
75    exit(status);
76  }
77  printf("passed\n");
78  return 0;
79}
80
81
82#define ROC_VERBOSE 0
83
84err_status_t
85roc_test(int num_trials) {
86  xtd_seq_num_t local, est, ref;
87  ut_connection utc;
88  int i, num_bad_est = 0;
89  int delta;
90  uint32_t ircvd;
91  double failure_rate;
92
93  index_init(&local);
94  index_init(&ref);
95  index_init(&est);
96
97  printf("\n\ttesting sequential insertion...");
98  for (i=0; i < 2048; i++) {
99    delta = index_guess(&local, &est, (uint16_t) ref);
100#if ROC_VERBOSE
101    printf("%lld, %lld, %d\n", ref, est,  i);
102#endif
103    if (ref != est) {
104#if ROC_VERBOSE
105      printf(" *bad estimate*\n");
106#endif
107      ++num_bad_est;
108    }
109    index_advance(&ref, 1);
110  }
111  failure_rate = (double) num_bad_est / num_trials;
112  if (failure_rate > 0.01) {
113    printf("error: failure rate too high (%d bad estimates in %d trials)\n",
114	   num_bad_est, num_trials);
115    return err_status_algo_fail;
116  }
117  printf("done\n");
118
119
120  printf("\ttesting non-sequential insertion...");
121  index_init(&local);
122  index_init(&ref);
123  index_init(&est);
124  ut_init(&utc);
125
126  for (i=0; i < num_trials; i++) {
127
128    /* get next seq num from unreliable transport simulator */
129    ircvd = ut_next_index(&utc);
130
131    /* set ref to value of ircvd */
132    ref = ircvd;
133
134    /* estimate index based on low bits of ircvd */
135    delta = index_guess(&local, &est, (uint16_t) ref);
136#if ROC_VERBOSE
137    printf("ref: %lld, local: %lld, est: %lld, ircvd: %d, delta: %d\n",
138	   ref, local, est, ircvd, delta);
139#endif
140
141    /* now update local xtd_seq_num_t as necessary */
142    if (delta > 0)
143      index_advance(&local, delta);
144
145    if (ref != est) {
146#if ROC_VERBOSE
147      printf(" *bad estimate*\n");
148#endif
149      /* record failure event */
150      ++num_bad_est;
151
152      /* reset local value to correct value */
153      local = ref;
154    }
155  }
156  failure_rate = (double) num_bad_est / num_trials;
157  if (failure_rate > 0.01) {
158    printf("error: failure rate too high (%d bad estimates in %d trials)\n",
159	   num_bad_est, num_trials);
160    return err_status_algo_fail;
161  }
162  printf("done\n");
163
164  return err_status_ok;
165}
166