Alexandre Lision | 8af73cb | 2013-12-10 14:11:20 -0500 | [diff] [blame] | 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 |
| 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 |
| 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 | } |