/*
* Copyright (c) 2004-2011 Apple Inc. All rights reserved.
*
* %Begin-Header%
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, and the entire permission notice in its entirety,
* including the disclaimer of warranties.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF
* WHICH ARE HEREBY DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
* %End-Header%
*/
#include <uuid/uuid.h>
#include <stdint.h>
#include <string.h>
#include <sys/random.h>
#include <sys/socket.h>
#include <sys/systm.h>
#include <sys/time.h>
extern int uuid_get_ethernet(u_int8_t *);
static void
read_node(uint8_t *node)
{
#if NETWORKING
if (uuid_get_ethernet(node) == 0) {
return;
}
#endif /* NETWORKING */
read_random(node, 6);
node[0] |= 0x01;
}
static uint64_t
read_time(void)
{
struct timespec tv;
nanotime(&tv);
return (tv.tv_sec * 10000000ULL) + (tv.tv_nsec / 100ULL) + 0x01B21DD213814000ULL;
}
void
uuid_clear(uuid_t uu)
{
memset(uu, 0, sizeof(uuid_t));
}
int
uuid_compare(const uuid_t uu1, const uuid_t uu2)
{
return memcmp(uu1, uu2, sizeof(uuid_t));
}
void
uuid_copy(uuid_t dst, const uuid_t src)
{
memcpy(dst, src, sizeof(uuid_t));
}
static void
uuid_random_setflags(uuid_t out)
{
out[6] = (out[6] & 0x0F) | 0x40;
out[8] = (out[8] & 0x3F) | 0x80;
}
void
uuid_generate_random(uuid_t out)
{
read_random(out, sizeof(uuid_t));
uuid_random_setflags(out);
}
void
uuid_generate_early_random(uuid_t out)
{
read_frandom(out, sizeof(uuid_t));
uuid_random_setflags(out);
}
void
uuid_generate_time(uuid_t out)
{
uint64_t time;
read_node(&out[10]);
read_random(&out[8], 2);
time = read_time();
out[0] = (uint8_t)(time >> 24);
out[1] = (uint8_t)(time >> 16);
out[2] = (uint8_t)(time >> 8);
out[3] = (uint8_t)time;
out[4] = (uint8_t)(time >> 40);
out[5] = (uint8_t)(time >> 32);
out[6] = (uint8_t)(time >> 56);
out[7] = (uint8_t)(time >> 48);
out[6] = (out[6] & 0x0F) | 0x10;
out[8] = (out[8] & 0x3F) | 0x80;
}
void
uuid_generate(uuid_t out)
{
uuid_generate_random(out);
}
int
uuid_is_null(const uuid_t uu)
{
return !memcmp(uu, UUID_NULL, sizeof(uuid_t));
}
int
uuid_parse(const uuid_string_t in, uuid_t uu)
{
int n = 0;
sscanf(in,
"%2hhx%2hhx%2hhx%2hhx-"
"%2hhx%2hhx-"
"%2hhx%2hhx-"
"%2hhx%2hhx-"
"%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx%n",
&uu[0], &uu[1], &uu[2], &uu[3],
&uu[4], &uu[5],
&uu[6], &uu[7],
&uu[8], &uu[9],
&uu[10], &uu[11], &uu[12], &uu[13], &uu[14], &uu[15], &n);
return n != 36 || in[n] != '\0' ? -1 : 0;
}
void
uuid_unparse_lower(const uuid_t uu, uuid_string_t out)
{
snprintf(out,
sizeof(uuid_string_t),
"%02x%02x%02x%02x-"
"%02x%02x-"
"%02x%02x-"
"%02x%02x-"
"%02x%02x%02x%02x%02x%02x",
uu[0], uu[1], uu[2], uu[3],
uu[4], uu[5],
uu[6], uu[7],
uu[8], uu[9],
uu[10], uu[11], uu[12], uu[13], uu[14], uu[15]);
}
void
uuid_unparse_upper(const uuid_t uu, uuid_string_t out)
{
snprintf(out,
sizeof(uuid_string_t),
"%02X%02X%02X%02X-"
"%02X%02X-"
"%02X%02X-"
"%02X%02X-"
"%02X%02X%02X%02X%02X%02X",
uu[0], uu[1], uu[2], uu[3],
uu[4], uu[5],
uu[6], uu[7],
uu[8], uu[9],
uu[10], uu[11], uu[12], uu[13], uu[14], uu[15]);
}
void
uuid_unparse(const uuid_t uu, uuid_string_t out)
{
uuid_unparse_upper(uu, out);
}