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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37 | #include "config.h" |
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38 | |
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39 | #ifdef _WIN32 |
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40 | #define _WIN32_WINNT 0x0500 |
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41 | #include <windows.h> |
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42 | #define UUID MYUUID |
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43 | #endif |
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44 | |
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45 | #include <stdio.h> |
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46 | #ifdef HAVE_UNISTD_H |
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47 | #include <unistd.h> |
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48 | #endif |
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49 | #include <stdlib.h> |
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50 | #include <sys/types.h> |
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51 | #ifdef HAVE_SYS_TIME_H |
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52 | #include <sys/time.h> |
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53 | #endif |
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54 | #include <time.h> |
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55 | |
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56 | #include "uuidP.h" |
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57 | |
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58 | time_t uuid_time(const uuid_t uu, struct timeval *ret_tv) |
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59 | { |
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60 | struct timeval tv; |
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61 | struct uuid uuid; |
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62 | uint32_t high; |
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63 | uint64_t clock_reg; |
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64 | |
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65 | uuid_unpack(uu, &uuid); |
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66 | |
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67 | high = uuid.time_mid | ((uint32_t)(uuid.time_hi_and_version & 0xFFF) << 16); |
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68 | clock_reg = uuid.time_low | ((uint64_t) high << 32); |
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69 | |
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70 | clock_reg -= (((uint64_t) 0x01B21DD2) << 32) + 0x13814000; |
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71 | tv.tv_sec = clock_reg / 10000000; |
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72 | tv.tv_usec = (clock_reg % 10000000) / 10; |
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73 | |
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74 | if (ret_tv) |
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75 | *ret_tv = tv; |
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76 | |
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77 | return tv.tv_sec; |
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78 | } |
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79 | |
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80 | int uuid_type(const uuid_t uu) |
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81 | { |
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82 | struct uuid uuid; |
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83 | |
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84 | uuid_unpack(uu, &uuid); |
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85 | return ((uuid.time_hi_and_version >> 12) & 0xF); |
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86 | } |
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87 | |
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88 | int uuid_variant(const uuid_t uu) |
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89 | { |
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90 | struct uuid uuid; |
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91 | int var; |
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92 | |
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93 | uuid_unpack(uu, &uuid); |
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94 | var = uuid.clock_seq; |
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95 | |
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96 | if ((var & 0x8000) == 0) |
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97 | return UUID_VARIANT_NCS; |
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98 | if ((var & 0x4000) == 0) |
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99 | return UUID_VARIANT_DCE; |
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100 | if ((var & 0x2000) == 0) |
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101 | return UUID_VARIANT_MICROSOFT; |
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102 | return UUID_VARIANT_OTHER; |
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103 | } |
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104 | |
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105 | #ifdef DEBUG |
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106 | static const char *variant_string(int variant) |
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107 | { |
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108 | switch (variant) { |
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109 | case UUID_VARIANT_NCS: |
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110 | return "NCS"; |
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111 | case UUID_VARIANT_DCE: |
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112 | return "DCE"; |
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113 | case UUID_VARIANT_MICROSOFT: |
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114 | return "Microsoft"; |
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115 | default: |
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116 | return "Other"; |
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117 | } |
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118 | } |
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119 | |
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120 | |
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121 | int |
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122 | main(int argc, char **argv) |
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123 | { |
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124 | uuid_t buf; |
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125 | time_t time_reg; |
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126 | struct timeval tv; |
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127 | int type, variant; |
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128 | |
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129 | if (argc != 2) { |
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130 | fprintf(stderr, "Usage: %s uuid\n", argv[0]); |
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131 | exit(1); |
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132 | } |
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133 | if (uuid_parse(argv[1], buf)) { |
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134 | fprintf(stderr, "Invalid UUID: %s\n", argv[1]); |
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135 | exit(1); |
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136 | } |
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137 | variant = uuid_variant(buf); |
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138 | type = uuid_type(buf); |
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139 | time_reg = uuid_time(buf, &tv); |
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140 | |
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141 | printf("UUID variant is %d (%s)\n", variant, variant_string(variant)); |
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142 | if (variant != UUID_VARIANT_DCE) { |
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143 | printf("Warning: This program only knows how to interpret " |
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144 | "DCE UUIDs.\n\tThe rest of the output is likely " |
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145 | "to be incorrect!!\n"); |
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146 | } |
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147 | printf("UUID type is %d", type); |
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148 | switch (type) { |
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149 | case 1: |
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150 | printf(" (time based)\n"); |
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151 | break; |
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152 | case 2: |
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153 | printf(" (DCE)\n"); |
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154 | break; |
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155 | case 3: |
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156 | printf(" (name-based)\n"); |
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157 | break; |
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158 | case 4: |
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159 | printf(" (random)\n"); |
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160 | break; |
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161 | default: |
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162 | printf("\n"); |
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163 | } |
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164 | if (type != 1) { |
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165 | printf("Warning: not a time-based UUID, so UUID time " |
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166 | "decoding will likely not work!\n"); |
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167 | } |
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168 | printf("UUID time is: (%ld, %ld): %s\n", tv.tv_sec, tv.tv_usec, |
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169 | ctime(&time_reg)); |
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170 | |
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171 | return 0; |
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172 | } |
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173 | #endif |
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