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
60 err_status_t
61 roc_test(int num_trials);
62
63 int
main(void)64 main (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
84 err_status_t
roc_test(int num_trials)85 roc_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