1 /* $NetBSD: t_randomid.c,v 1.5 2015/03/07 09:59:15 isaki Exp $ */ 2 3 /*- 4 * Copyright (c) 2010 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <atf-c.h> 30 31 #include <sys/types.h> 32 33 #include <assert.h> 34 #include <inttypes.h> 35 #include <randomid.h> 36 #include <stdio.h> 37 #include <string.h> 38 39 #define PERIOD 30000 40 41 uint32_t last[65536]; 42 43 ATF_TC(randomid_basic); 44 ATF_TC_HEAD(randomid_basic, tc) 45 { 46 47 atf_tc_set_md_var(tc, "descr", "Check randomid(3)"); 48 } 49 50 ATF_TC_BODY(randomid_basic, tc) 51 { 52 static randomid_t ctx = NULL; 53 uint32_t lowest, n, diff; 54 uint16_t id; 55 56 memset(last, 0, sizeof(last)); 57 ctx = randomid_new(16, (long)3600); 58 59 lowest = UINT32_MAX; 60 61 for (n = 0; n < 100000; n++) { 62 id = randomid(ctx); 63 64 if (last[id] > 0) { 65 diff = n - last[id]; 66 67 if (diff <= lowest) { 68 if (lowest != UINT32_MAX) 69 printf("id %5d: last call at %9"PRIu32 70 ", current call %9"PRIu32 71 " (diff %5"PRIu32"), " 72 "lowest %"PRIu32"\n", 73 id, last[id], n, diff, lowest); 74 75 ATF_REQUIRE_MSG(diff >= PERIOD, 76 "diff (%"PRIu32") less than minimum " 77 "period (%d)", diff, PERIOD); 78 79 lowest = diff; 80 } 81 } 82 83 last[id] = n; 84 } 85 } 86 87 ATF_TP_ADD_TCS(tp) 88 { 89 90 ATF_TP_ADD_TC(tp, randomid_basic); 91 92 return atf_no_error(); 93 } 94