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Gianni Tedesco
785684b4fd
This patch converts xl to randomly generate UUID's rather than using a dodgy time-seeded PRNG. I have ignored various suggestions so far on auto-generation of MAC addresses and left it as a topic for a future patch to solve. In other words the behaviour stays the same it's just using a true random source. This patch also implements the "uuid" config file parameter in xl. Signed-off-by: Gianni Tedesco <gianni.tedesco@citrix.com> Acked-By: Christoph Egger <Christoph.Egger@amd.com> Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
135 lines
3.5 KiB
C
135 lines
3.5 KiB
C
/*
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* Copyright (C) 2008,2010 Citrix Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation; version 2.1 only. with the special
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* exception on linking described in file LICENSE.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*/
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#ifndef __LIBXL_UUID_H__
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#define __LIBXL_UUID_H__
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#define LIBXL_UUID_FMT "%02hhx%02hhx%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx"
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#define LIBXL__UUID_BYTES(uuid) uuid[0], uuid[1], uuid[2], uuid[3], \
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uuid[4], uuid[5], uuid[6], uuid[7], \
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uuid[8], uuid[9], uuid[10], uuid[11], \
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uuid[12], uuid[13], uuid[14], uuid[15]
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#if defined(__linux__)
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#include <uuid/uuid.h>
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typedef struct {
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uuid_t uuid;
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} libxl_uuid;
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#define LIBXL_UUID_BYTES(arg) LIBXL__UUID_BYTES(((uint8_t *)arg.uuid))
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static inline int libxl_uuid_is_nil(libxl_uuid *uuid)
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{
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return uuid_is_null(uuid->uuid);
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}
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static inline void libxl_uuid_generate(libxl_uuid *uuid)
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{
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uuid_generate(uuid->uuid);
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}
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static inline int libxl_uuid_from_string(libxl_uuid *uuid, const char *in)
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{
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return uuid_parse(in, uuid->uuid);
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}
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static inline void libxl_uuid_copy(libxl_uuid *dst, libxl_uuid *src)
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{
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uuid_copy(dst->uuid, src->uuid);
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}
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static inline void libxl_uuid_clear(libxl_uuid *uuid)
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{
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uuid_clear(uuid->uuid);
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}
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static inline int libxl_uuid_compare(libxl_uuid *uuid1, libxl_uuid *uuid2)
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{
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return uuid_compare(uuid1->uuid, uuid2->uuid);
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}
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static inline uint8_t *libxl_uuid_bytearray(libxl_uuid *uuid)
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{
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return uuid->uuid;
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}
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#elif defined(__NetBSD__)
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#include <uuid.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <assert.h>
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#define LIBXL_UUID_BYTES(arg) LIBXL__UUID_BYTES(arg.uuid)
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typedef struct {
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uint8_t uuid[16];
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} libxl_uuid;
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static inline int libxl_uuid_is_nil(libxl_uuid *uuid)
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{
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uint32_t status;
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return uuid_is_nil((uuid_t *)uuid->uuid, &status);
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}
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static inline void libxl_uuid_generate(libxl_uuid *uuid)
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{
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uint32_t status;
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uuid_create((uuid_t *)uuid->uuid, &status);
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assert(status == uuid_s_ok);
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}
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#define LIBXL__UUID_PTRS(uuid) &uuid[0], &uuid[1], &uuid[2], &uuid[3], \
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&uuid[4], &uuid[5], &uuid[6], &uuid[7], \
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&uuid[8], &uuid[9], &uuid[10],&uuid[11], \
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&uuid[12],&uuid[13],&uuid[14],&uuid[15]
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static inline int libxl_uuid_from_string(libxl_uuid *uuid, const char *in)
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{
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if ( sscanf(in, LIBXL_UUID_FMT, LIBXL__UUID_PTRS(uuid->uuid)) != sizeof(uuid->uuid) )
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return -1;
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return 0;
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}
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#undef LIBXL__UUID_PTRS
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static inline void libxl_uuid_copy(libxl_uuid *dst, libxl_uuid *src)
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{
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memcpy(dst->uuid, src->uuid, sizeof(dst->uuid));
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}
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static inline void libxl_uuid_clear(libxl_uuid *uuid)
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{
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memset(uuid->uuid, 0, sizeof(uuid->uuid));
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}
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static inline int libxl_uuid_compare(libxl_uuid *uuid1, libxl_uuid *uuid2)
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{
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return memcmp(uuid1->uuid, uuid2->uuid, sizeof(uuid1->uuid));
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}
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static inline uint8_t *libxl_uuid_bytearray(libxl_uuid *uuid)
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{
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return uuid->uuid;
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}
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#else
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#error "Please update libxl_uuid.h for your OS"
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#endif
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#endif /* __LIBXL_UUID_H__ */
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