external/bsd/iscsi/dist/src/lib/uuid.c

   1 /* $NetBSD: uuid.c,v 1.4 2009/06/23 05:11:47 agc Exp $ */
   2
   3 /*
   4  * Copyright © 2006 Alistair Crooks.  All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote
  15  *    products derived from this software without specific prior written
  16  *    permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
  19  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  22  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  24  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  26  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  27  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  28  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30 #include "config.h"
  31
  32 #ifdef HAVE_INTTYPES_H
  33 #include <inttypes.h>
  34 #endif
  35
  36 #include <sys/types.h>
  37
  38 #ifdef HAVE_SYS_PARAM_H
  39 #include <sys/param.h>
  40 #endif
  41
  42 #ifdef HAVE_SYS_TIME_H
  43 #include <sys/time.h>
  44 #endif
  45
  46 #include <stdio.h>
  47 #include <stdlib.h>
  48 #include <string.h>
  49 #include <unistd.h>
  50
  51 #include "storage.h"
  52 #include "compat.h"
  53 #include "defs.h"
  54
  55 /* just fill the struct with random values for now */
  56 void
  57 nbuuid_create(nbuuid_t *uuid, uint32_t *status)
  58 {
  59         uint64_t        ether;
  60         time_t          t;
  61
  62         (void) time(&t);
  63         ether = ((uint64_t)random() << 32) | random();
  64         uuid->time_low = (int)t;
  65         uuid->time_mid = (uint16_t)(random() & 0xffff);
  66         uuid->time_hi_and_version = (uint16_t)(random() & 0xffff);
  67         uuid->clock_seq_low = (uint8_t)(random() & 0xff);
  68         uuid->clock_seq_hi_and_reserved = (uint8_t)(random() & 0xff);
  69         (void) memcpy(&uuid->node, &ether, sizeof(uuid->node));
  70         *status = 0;
  71 }
  72
  73 /* convert the struct to a printable string */
  74 void
  75 nbuuid_to_string(nbuuid_t *uuid, char **str, uint32_t *status)
  76 {
  77         char    s[64];
  78
  79         (void) snprintf(s, sizeof(s), "%8.8x-%4.4x-%4.4x-%2.2x%2.2x-%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x",
  80                 uuid->time_low,
  81                 uuid->time_mid,
  82                 uuid->time_hi_and_version,
  83                 uuid->clock_seq_hi_and_reserved,
  84                 uuid->clock_seq_low,
  85                 uuid->node[0],
  86                 uuid->node[1],
  87                 uuid->node[2],
  88                 uuid->node[3],
  89                 uuid->node[4],
  90                 uuid->node[5]);
  91         *str = strdup(s);
  92         *status = 0;
  93 }