The Tor Browser / file comparison
comparison: netwerk/srtp/src/crypto/replay/ut_sim.c
netwerk/srtp/src/crypto/replay/ut_sim.c
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:e6e810612d44 |
|---|---|
| 1 /* | |
| 2 * ut_sim.c | |
| 3 * | |
| 4 * an unreliable transport simulator | |
| 5 * (for testing replay databases and suchlike) | |
| 6 * | |
| 7 * David A. McGrew | |
| 8 * Cisco Systems, Inc. | |
| 9 */ | |
| 10 | |
| 11 /* | |
| 12 * | |
| 13 * Copyright (c) 2001-2006, Cisco Systems, Inc. | |
| 14 * All rights reserved. | |
| 15 * | |
| 16 * Redistribution and use in source and binary forms, with or without | |
| 17 * modification, are permitted provided that the following conditions | |
| 18 * are met: | |
| 19 * | |
| 20 * Redistributions of source code must retain the above copyright | |
| 21 * notice, this list of conditions and the following disclaimer. | |
| 22 * | |
| 23 * Redistributions in binary form must reproduce the above | |
| 24 * copyright notice, this list of conditions and the following | |
| 25 * disclaimer in the documentation and/or other materials provided | |
| 26 * with the distribution. | |
| 27 * | |
| 28 * Neither the name of the Cisco Systems, Inc. nor the names of its | |
| 29 * contributors may be used to endorse or promote products derived | |
| 30 * from this software without specific prior written permission. | |
| 31 * | |
| 32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |
| 35 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |
| 36 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, | |
| 37 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| 38 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
| 39 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 40 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
| 41 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 42 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
| 43 * OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 44 * | |
| 45 */ | |
| 46 | |
| 47 | |
| 48 #include "ut_sim.h" | |
| 49 | |
| 50 | |
| 51 int | |
| 52 ut_compar(const void *a, const void *b) { | |
| 53 return rand() > (RAND_MAX/2) ? -1 : 1; | |
| 54 } | |
| 55 | |
| 56 void | |
| 57 ut_init(ut_connection *utc) { | |
| 58 int i; | |
| 59 utc->index = 0; | |
| 60 | |
| 61 for (i=0; i < UT_BUF; i++) | |
| 62 utc->buffer[i] = i; | |
| 63 | |
| 64 qsort(utc->buffer, UT_BUF, sizeof(uint32_t), ut_compar); | |
| 65 | |
| 66 utc->index = UT_BUF - 1; | |
| 67 } | |
| 68 | |
| 69 uint32_t | |
| 70 ut_next_index(ut_connection *utc) { | |
| 71 uint32_t tmp; | |
| 72 | |
| 73 tmp = utc->buffer[0]; | |
| 74 utc->index++; | |
| 75 utc->buffer[0] = utc->index; | |
| 76 | |
| 77 qsort(utc->buffer, UT_BUF, sizeof(uint32_t), ut_compar); | |
| 78 | |
| 79 return tmp; | |
| 80 } | |
| 81 | |
| 82 | |
| 83 | |
| 84 #ifdef UT_TEST | |
| 85 | |
| 86 #include <stdio.h> | |
| 87 | |
| 88 int | |
| 89 main() { | |
| 90 uint32_t i, irecvd, idiff; | |
| 91 ut_connection utc; | |
| 92 | |
| 93 ut_init(&utc); | |
| 94 | |
| 95 for (i=0; i < 1000; i++) { | |
| 96 irecvd = ut_next_index(&utc); | |
| 97 idiff = i - irecvd; | |
| 98 printf("%lu\t%lu\t%d\n", i, irecvd, idiff); | |
| 99 } | |
| 100 | |
| 101 return 0; | |
| 102 } | |
| 103 | |
| 104 | |
| 105 #endif |
