diff options
Diffstat (limited to 'sys/kern/kern_uuid.c')
| -rw-r--r-- | sys/kern/kern_uuid.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/sys/kern/kern_uuid.c b/sys/kern/kern_uuid.c new file mode 100644 index 00000000000..7505bf42834 --- /dev/null +++ b/sys/kern/kern_uuid.c @@ -0,0 +1,151 @@ +/* $OpenBSD: kern_uuid.c,v 1.1 2014/07/13 15:32:28 miod Exp $ */ +/* $NetBSD: kern_uuid.c,v 1.18 2011/11/19 22:51:25 tls Exp $ */ + +/* + * Copyright (c) 2002 Marcel Moolenaar + * All rights reserved. + * + * 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, this list of conditions and the following disclaimer. + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * $FreeBSD: /repoman/r/ncvs/src/sys/kern/kern_uuid.c,v 1.7 2004/01/12 +13:34:11 rse Exp $ + */ + +#include <sys/param.h> +#include <sys/endian.h> +#include <sys/systm.h> +#include <sys/uuid.h> + +/* + * For a description of UUIDs see RFC 4122. + */ + +struct uuid_private { + struct { + uint32_t low; + uint16_t mid; + uint16_t hi; + } time; + uint16_t seq; + uint16_t node[UUID_NODE_LEN>>1]; +}; + +#ifdef DEBUG +int +uuid_snprintf(char *buf, size_t sz, const struct uuid *uuid) +{ + const struct uuid_private *id; + int cnt; + + id = (const struct uuid_private *)uuid; + cnt = snprintf(buf, sz, "%08x-%04x-%04x-%04x-%04x%04x%04x", + id->time.low, id->time.mid, id->time.hi, betoh16(id->seq), + betoh16(id->node[0]), betoh16(id->node[1]), betoh16(id->node[2])); + return (cnt); +} + +int +uuid_printf(const struct uuid *uuid) +{ + char buf[_UUID_BUF_LEN]; + + (void) uuid_snprintf(buf, sizeof(buf), uuid); + printf("%s", buf); + return (0); +} +#endif + +/* + * Encode/Decode UUID into octet-stream. + * + * 0 1 2 3 + * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | time_low | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | time_mid | time_hi_and_version | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * |clk_seq_hi_res | clk_seq_low | node (0-1) | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | node (2-5) | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + */ + +void +uuid_enc_le(void *buf, const struct uuid *uuid) +{ + uint8_t *p = buf; + int i; + + p[0] = htole32(uuid->time_low); + p[4] = htole16(uuid->time_mid); + p[6] = htole16(uuid->time_hi_and_version); + p[8] = uuid->clock_seq_hi_and_reserved; + p[9] = uuid->clock_seq_low; + for (i = 0; i < UUID_NODE_LEN; i++) + p[10 + i] = uuid->node[i]; +} + +void +uuid_dec_le(void const *buf, struct uuid *uuid) +{ + const uint8_t *p = buf; + int i; + + uuid->time_low = letoh32(*(uint32_t*)p); + uuid->time_mid = letoh16(*(uint16_t*)(p + 4)); + uuid->time_hi_and_version = letoh16(*(uint16_t*)(p + 6)); + uuid->clock_seq_hi_and_reserved = p[8]; + uuid->clock_seq_low = p[9]; + for (i = 0; i < UUID_NODE_LEN; i++) + uuid->node[i] = p[10 + i]; +} + +void +uuid_enc_be(void *buf, const struct uuid *uuid) +{ + uint8_t *p = buf; + int i; + + p[0] = htobe32(uuid->time_low); + p[4] = htobe16(uuid->time_mid); + p[6] = htobe16(uuid->time_hi_and_version); + p[8] = uuid->clock_seq_hi_and_reserved; + p[9] = uuid->clock_seq_low; + for (i = 0; i < UUID_NODE_LEN; i++) + p[10 + i] = uuid->node[i]; +} + +void +uuid_dec_be(void const *buf, struct uuid *uuid) +{ + const uint8_t *p = buf; + int i; + + uuid->time_low = betoh32(*(uint32_t*)p); + uuid->time_mid = betoh16(*(uint16_t*)(p + 4)); + uuid->time_hi_and_version = betoh16(*(uint16_t*)(p + 6)); + uuid->clock_seq_hi_and_reserved = p[8]; + uuid->clock_seq_low = p[9]; + for (i = 0; i < UUID_NODE_LEN; i++) + uuid->node[i] = p[10 + i]; +} |