[439959b] | 1 | /* |
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| 2 | * uuid_time.c --- Interpret the time field from a uuid. This program |
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| 3 | * violates the UUID abstraction barrier by reaching into the guts |
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| 4 | * of a UUID and interpreting it. |
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| 5 | * |
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| 6 | * Copyright (C) 1998, 1999 Theodore Ts'o. |
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| 7 | * |
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| 8 | * %Begin-Header% |
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| 9 | * Redistribution and use in source and binary forms, with or without |
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| 10 | * modification, are permitted provided that the following conditions |
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| 11 | * are met: |
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| 12 | * 1. Redistributions of source code must retain the above copyright |
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| 13 | * notice, and the entire permission notice in its entirety, |
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| 14 | * including the disclaimer of warranties. |
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 16 | * notice, this list of conditions and the following disclaimer in the |
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| 17 | * documentation and/or other materials provided with the distribution. |
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| 18 | * 3. The name of the author may not be used to endorse or promote |
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| 19 | * products derived from this software without specific prior |
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| 20 | * written permission. |
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| 21 | * |
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| 22 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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| 23 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 24 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF |
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| 25 | * WHICH ARE HEREBY DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE |
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| 26 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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| 27 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
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| 28 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
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| 29 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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| 30 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 31 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE |
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| 32 | * USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH |
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| 33 | * DAMAGE. |
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| 34 | * %End-Header% |
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| 35 | */ |
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| 36 | |
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[ebdeaf6] | 37 | #ifdef HAVE_CONFIG_H |
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[439959b] | 38 | #include "config.h" |
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[ebdeaf6] | 39 | #endif |
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[439959b] | 40 | |
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| 41 | #ifdef _WIN32 |
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| 42 | #define _WIN32_WINNT 0x0500 |
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| 43 | #include <windows.h> |
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| 44 | #define UUID MYUUID |
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| 45 | #endif |
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| 46 | |
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| 47 | #include <stdio.h> |
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| 48 | #ifdef HAVE_UNISTD_H |
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| 49 | #include <unistd.h> |
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| 50 | #endif |
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| 51 | #include <stdlib.h> |
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| 52 | #include <sys/types.h> |
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| 53 | #ifdef HAVE_SYS_TIME_H |
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| 54 | #include <sys/time.h> |
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| 55 | #endif |
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| 56 | #include <time.h> |
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| 57 | |
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| 58 | #include "uuidP.h" |
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| 59 | |
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| 60 | time_t uuid_time(const uuid_t uu, struct timeval *ret_tv) |
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| 61 | { |
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| 62 | struct timeval tv; |
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| 63 | struct uuid uuid; |
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| 64 | uint32_t high; |
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| 65 | uint64_t clock_reg; |
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| 66 | |
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| 67 | uuid_unpack(uu, &uuid); |
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| 68 | |
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[7ae4262d] | 69 | high = uuid.time_mid | ((uint32_t)(uuid.time_hi_and_version & 0xFFF) << 16); |
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[439959b] | 70 | clock_reg = uuid.time_low | ((uint64_t) high << 32); |
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| 71 | |
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| 72 | clock_reg -= (((uint64_t) 0x01B21DD2) << 32) + 0x13814000; |
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| 73 | tv.tv_sec = clock_reg / 10000000; |
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| 74 | tv.tv_usec = (clock_reg % 10000000) / 10; |
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| 75 | |
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| 76 | if (ret_tv) |
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| 77 | *ret_tv = tv; |
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| 78 | |
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| 79 | return tv.tv_sec; |
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| 80 | } |
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| 81 | |
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| 82 | int uuid_type(const uuid_t uu) |
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| 83 | { |
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| 84 | struct uuid uuid; |
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| 85 | |
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| 86 | uuid_unpack(uu, &uuid); |
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| 87 | return ((uuid.time_hi_and_version >> 12) & 0xF); |
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| 88 | } |
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| 89 | |
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| 90 | int uuid_variant(const uuid_t uu) |
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| 91 | { |
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| 92 | struct uuid uuid; |
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| 93 | int var; |
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| 94 | |
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| 95 | uuid_unpack(uu, &uuid); |
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| 96 | var = uuid.clock_seq; |
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| 97 | |
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| 98 | if ((var & 0x8000) == 0) |
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| 99 | return UUID_VARIANT_NCS; |
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| 100 | if ((var & 0x4000) == 0) |
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| 101 | return UUID_VARIANT_DCE; |
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| 102 | if ((var & 0x2000) == 0) |
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| 103 | return UUID_VARIANT_MICROSOFT; |
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| 104 | return UUID_VARIANT_OTHER; |
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| 105 | } |
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| 106 | |
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| 107 | #ifdef DEBUG |
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| 108 | static const char *variant_string(int variant) |
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| 109 | { |
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| 110 | switch (variant) { |
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| 111 | case UUID_VARIANT_NCS: |
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| 112 | return "NCS"; |
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| 113 | case UUID_VARIANT_DCE: |
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| 114 | return "DCE"; |
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| 115 | case UUID_VARIANT_MICROSOFT: |
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| 116 | return "Microsoft"; |
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| 117 | default: |
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| 118 | return "Other"; |
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| 119 | } |
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| 120 | } |
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| 121 | |
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| 122 | |
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| 123 | int |
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| 124 | main(int argc, char **argv) |
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| 125 | { |
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| 126 | uuid_t buf; |
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| 127 | time_t time_reg; |
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| 128 | struct timeval tv; |
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| 129 | int type, variant; |
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| 130 | |
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| 131 | if (argc != 2) { |
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| 132 | fprintf(stderr, "Usage: %s uuid\n", argv[0]); |
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| 133 | exit(1); |
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| 134 | } |
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| 135 | if (uuid_parse(argv[1], buf)) { |
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| 136 | fprintf(stderr, "Invalid UUID: %s\n", argv[1]); |
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| 137 | exit(1); |
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| 138 | } |
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| 139 | variant = uuid_variant(buf); |
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| 140 | type = uuid_type(buf); |
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| 141 | time_reg = uuid_time(buf, &tv); |
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| 142 | |
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| 143 | printf("UUID variant is %d (%s)\n", variant, variant_string(variant)); |
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| 144 | if (variant != UUID_VARIANT_DCE) { |
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| 145 | printf("Warning: This program only knows how to interpret " |
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| 146 | "DCE UUIDs.\n\tThe rest of the output is likely " |
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| 147 | "to be incorrect!!\n"); |
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| 148 | } |
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| 149 | printf("UUID type is %d", type); |
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| 150 | switch (type) { |
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| 151 | case 1: |
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| 152 | printf(" (time based)\n"); |
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| 153 | break; |
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| 154 | case 2: |
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| 155 | printf(" (DCE)\n"); |
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| 156 | break; |
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| 157 | case 3: |
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| 158 | printf(" (name-based)\n"); |
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| 159 | break; |
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| 160 | case 4: |
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| 161 | printf(" (random)\n"); |
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| 162 | break; |
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| 163 | default: |
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| 164 | printf("\n"); |
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| 165 | } |
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| 166 | if (type != 1) { |
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| 167 | printf("Warning: not a time-based UUID, so UUID time " |
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| 168 | "decoding will likely not work!\n"); |
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| 169 | } |
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| 170 | printf("UUID time is: (%ld, %ld): %s\n", tv.tv_sec, tv.tv_usec, |
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| 171 | ctime(&time_reg)); |
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| 172 | |
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| 173 | return 0; |
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| 174 | } |
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| 175 | #endif |
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