1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/netwerk/srtp/src/crypto/replay/ut_sim.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,105 @@
1.4 +/*
1.5 + * ut_sim.c
1.6 + *
1.7 + * an unreliable transport simulator
1.8 + * (for testing replay databases and suchlike)
1.9 + *
1.10 + * David A. McGrew
1.11 + * Cisco Systems, Inc.
1.12 + */
1.13 +
1.14 +/*
1.15 + *
1.16 + * Copyright (c) 2001-2006, Cisco Systems, Inc.
1.17 + * All rights reserved.
1.18 + *
1.19 + * Redistribution and use in source and binary forms, with or without
1.20 + * modification, are permitted provided that the following conditions
1.21 + * are met:
1.22 + *
1.23 + * Redistributions of source code must retain the above copyright
1.24 + * notice, this list of conditions and the following disclaimer.
1.25 + *
1.26 + * Redistributions in binary form must reproduce the above
1.27 + * copyright notice, this list of conditions and the following
1.28 + * disclaimer in the documentation and/or other materials provided
1.29 + * with the distribution.
1.30 + *
1.31 + * Neither the name of the Cisco Systems, Inc. nor the names of its
1.32 + * contributors may be used to endorse or promote products derived
1.33 + * from this software without specific prior written permission.
1.34 + *
1.35 + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
1.36 + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
1.37 + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
1.38 + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
1.39 + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
1.40 + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
1.41 + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
1.42 + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
1.43 + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
1.44 + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
1.45 + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
1.46 + * OF THE POSSIBILITY OF SUCH DAMAGE.
1.47 + *
1.48 + */
1.49 +
1.50 +
1.51 +#include "ut_sim.h"
1.52 +
1.53 +
1.54 +int
1.55 +ut_compar(const void *a, const void *b) {
1.56 + return rand() > (RAND_MAX/2) ? -1 : 1;
1.57 +}
1.58 +
1.59 +void
1.60 +ut_init(ut_connection *utc) {
1.61 + int i;
1.62 + utc->index = 0;
1.63 +
1.64 + for (i=0; i < UT_BUF; i++)
1.65 + utc->buffer[i] = i;
1.66 +
1.67 + qsort(utc->buffer, UT_BUF, sizeof(uint32_t), ut_compar);
1.68 +
1.69 + utc->index = UT_BUF - 1;
1.70 +}
1.71 +
1.72 +uint32_t
1.73 +ut_next_index(ut_connection *utc) {
1.74 + uint32_t tmp;
1.75 +
1.76 + tmp = utc->buffer[0];
1.77 + utc->index++;
1.78 + utc->buffer[0] = utc->index;
1.79 +
1.80 + qsort(utc->buffer, UT_BUF, sizeof(uint32_t), ut_compar);
1.81 +
1.82 + return tmp;
1.83 +}
1.84 +
1.85 +
1.86 +
1.87 +#ifdef UT_TEST
1.88 +
1.89 +#include <stdio.h>
1.90 +
1.91 +int
1.92 +main() {
1.93 + uint32_t i, irecvd, idiff;
1.94 + ut_connection utc;
1.95 +
1.96 + ut_init(&utc);
1.97 +
1.98 + for (i=0; i < 1000; i++) {
1.99 + irecvd = ut_next_index(&utc);
1.100 + idiff = i - irecvd;
1.101 + printf("%lu\t%lu\t%d\n", i, irecvd, idiff);
1.102 + }
1.103 +
1.104 + return 0;
1.105 +}
1.106 +
1.107 +
1.108 +#endif
