/*
* Copyright 2014-2018, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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.
*
* * Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS 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 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* uuid.c -- uuid utilities
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "uuid.h"
#include "out.h"
/*
* util_uuid_to_string -- generate a string form of the uuid
*/
int
util_uuid_to_string(const uuid_t u, char *buf)
{
int len; /* size that is returned from sprintf call */
if (buf == NULL) {
LOG(2, "invalid buffer for uuid string");
return -1;
}
if (u == NULL) {
LOG(2, "invalid uuid structure");
return -1;
}
struct uuid *uuid = (struct uuid *)u;
len = snprintf(buf, POOL_HDR_UUID_STR_LEN,
"%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
uuid->time_low, uuid->time_mid, uuid->time_hi_and_ver,
uuid->clock_seq_hi, uuid->clock_seq_low, uuid->node[0],
uuid->node[1], uuid->node[2], uuid->node[3], uuid->node[4],
uuid->node[5]);
if (len != POOL_HDR_UUID_STR_LEN - 1) {
LOG(2, "snprintf(uuid): %d", len);
return -1;
}
return 0;
}
/*
* util_uuid_from_string -- generate a binary form of the uuid
*
* uuid string read from /proc/sys/kernel/random/uuid. UUID string
* format example:
* f81d4fae-7dec-11d0-a765-00a0c91e6bf6
*/
int
util_uuid_from_string(const char *uuid, struct uuid *ud)
{
if (strlen(uuid) != 36) {
LOG(2, "invalid uuid string");
return -1;
}
if (uuid[8] != '-' || uuid[13] != '-' || uuid[18] != '-' ||
uuid[23] != '-') {
LOG(2, "invalid uuid string");
return -1;
}
int n = sscanf(uuid,
"%08x-%04hx-%04hx-%02hhx%02hhx-"
"%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx",
&ud->time_low, &ud->time_mid, &ud->time_hi_and_ver,
&ud->clock_seq_hi, &ud->clock_seq_low, &ud->node[0],
&ud->node[1], &ud->node[2], &ud->node[3], &ud->node[4],
&ud->node[5]);
if (n != 11) {
LOG(2, "sscanf(uuid)");
return -1;
}
return 0;
}