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/*
* roc_driver.c
*
* test driver for rollover counter replay implementation
*
* David A. McGrew
* Cisco Systems, Inc.
*/
/*
*
* Copyright (c) 2001-2006, 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
* 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"
err_status_t
roc_test(int num_trials);
int
main (void) {
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
err_status_t
roc_test(int num_trials) {
xtd_seq_num_t local, est, ref;
ut_connection utc;
int i, num_bad_est = 0;
int delta;
uint32_t ircvd;
double failure_rate;
index_init(&local);
index_init(&ref);
index_init(&est);
printf("\n\ttesting sequential insertion...");
for (i=0; i < 2048; i++) {
delta = 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;
}
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 err_status_algo_fail;
}
printf("done\n");
printf("\ttesting non-sequential insertion...");
index_init(&local);
index_init(&ref);
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 = 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 err_status_algo_fail;
}
/* now update local xtd_seq_num_t as necessary */
if (delta > 0)
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 err_status_algo_fail;
}
printf("done\n");
return err_status_ok;
}
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