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/** BEGIN COPYRIGHT BLOCK
* Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
* Copyright (C) 2005 Red Hat, Inc.
* All rights reserved.
* END COPYRIGHT BLOCK **/
/* uniqueidgen.c - implementation for uniqueID generator */
#include <string.h>
#ifndef _WIN32 /* for ntoh* functions */
#include <sys/types.h>
#include <sys/time.h>
#include <sys/sysinfo.h>
#include <sys/utsname.h>
#endif
#include "nspr.h"
#include "slap.h"
#include "uuid.h"
#define MODULE "uniqueid generator"
/* converts from guid -> UniqueID */
/* static void uuid2UniqueID (const guid_t *uuid, Slapi_UniqueID *uId); */
/* converts from UniqueID -> guid */
/* static void uniqueID2uuid (const Slapi_UniqueID *uId, guid_t *uuid); */
/* validates directory */
static int validDir (const char *configDir);
/* Function: uniqueIDGenInit
Description: this function initializes the generator
Parameters: configDir - directory in which generators state is stored
configDN - DIT entry with state information
mtGen - indicates whether multiple threads will use generator
Return: UID_SUCCESS if function succeeds
UID_BADDATA if invalif directory is passed
UID_SYSTEM_ERROR if any other failure occurs
*/
int uniqueIDGenInit (const char *configDir, const Slapi_DN *configDN, PRBool mtGen)
{
int rt;
if ((configDN == NULL && (configDir == NULL || !validDir(configDir))) ||
(configDN && configDir))
{
slapi_log_error (SLAPI_LOG_FATAL, MODULE, "uniqueIDGenInit: invalid arguments\n");
return UID_BADDATA;
}
rt = uuid_init (configDir, configDN, mtGen);
if (rt == UUID_SUCCESS)
return UID_SUCCESS;
else
{
slapi_log_error (SLAPI_LOG_FATAL, MODULE, "uniqueIDGenInit: "
"generator initialization failed\n");
return UID_SYSTEM_ERROR;
}
}
/* Function: uniqueIDGenCleanup
Description: cleanup
Parameters: none
Return: none
*/
void uniqueIDGenCleanup (){
uuid_cleanup ();
}
/* Function: slapi_uniqueIDGenerate
Description: this function generates UniqueID; exposed to the plugins.
Parameters: uId - structure in which new id will be return
Return: UID_SUCCESS, if operation is successful
UID_BADDATA, if null pointer is passed to the function
UID_SYSTEM_ERROR, if update to persistent storage failed
*/
int slapi_uniqueIDGenerate (Slapi_UniqueID *uId){
int rt;
if (uId == NULL)
{
slapi_log_error (SLAPI_LOG_FATAL, MODULE, "uniqueIDGenerate: "
"NULL paramter is passed to the function.\n");
return UID_BADDATA;
}
rt = uuid_create(uId);
if (rt != UUID_SUCCESS)
{
slapi_log_error (SLAPI_LOG_FATAL, MODULE, "uniqueIDGenerate: "
"id generation failed.\n");
return UID_SYSTEM_ERROR;
}
return UID_SUCCESS;
}
/* Function: slapi_uniqueIDGenerateString
Description: this function generates uniqueid an returns it as a string
This function returns the data in the format generated by
slapi_uniqueIDFormat.
Parameters: uId - buffer to receive the ID. Caller is responsible for
freeing uId buffer.
Return: UID_SUCCESS if function succeeds;
UID_BADDATA if invalid pointer passed to the function;
UID_MEMORY_ERROR if malloc fails;
UID_SYSTEM_ERROR update to persistent storage failed.
*/
int slapi_uniqueIDGenerateString (char **uId)
{
Slapi_UniqueID uIdTemp;
int rc;
rc = slapi_uniqueIDGenerate (&uIdTemp);
if (rc != UID_SUCCESS)
return rc;
rc = slapi_uniqueIDFormat (&uIdTemp, uId);
return rc;
}
/* Function: slapi_uniqueIDGenerateFromName
Description: this function generates an id from name. See uuid
draft for more details. This function is thread safe.
Parameters: uId - generated id
uIDBase - uid used for generation to distinguish different
name - buffer containing name from which to generate the id
namelen - length of the name buffer
name spaces
Return: UID_SUCCESS if function succeeds
UID_BADDATA if invalid argument is passed to the
function.
*/
int slapi_uniqueIDGenerateFromName (Slapi_UniqueID *uId, const Slapi_UniqueID *uIdBase,
const void *name, int namelen)
{
if (uId == NULL || uIdBase == NULL || name == NULL || namelen <= 0)
{
slapi_log_error (SLAPI_LOG_FATAL, MODULE, "uniqueIDGenerateMT: "
"invalid paramter is passed to the function.\n");
return UID_BADDATA;
}
uuid_create_from_name(uId, *uIdBase, name, namelen);
return UID_SUCCESS;
}
/* Function: slapi_uniqueIDGenerateFromName
Description: this function generates an id from a name and returns
it in the string format. See uuid draft for more
details. This function can be used in both a
singlethreaded and a multithreaded environments.
Parameters: uId - generated id in string form
uIDBase - uid used for generation to distinguish among
different name spaces in string form; NULL means to use
empty id as the base.
name - buffer containing name from which to generate the id
namelen - length of the name buffer
Return: UID_SUCCESS if function succeeds
UID_BADDATA if invalid argument is passed to the
function.
*/
int slapi_uniqueIDGenerateFromNameString (char **uId,
const char *uIdBase,
const void *name, int namelen)
{
int rc;
Slapi_UniqueID idBase;
Slapi_UniqueID idGen;
/* just use Id of all 0 as base id */
if (uIdBase == NULL)
{
memset (&idBase, 0, sizeof (idBase));
memset (&idGen, 0, sizeof (idGen));
}
else
{
rc = slapi_uniqueIDScan (&idBase, uIdBase);
if (rc != UID_SUCCESS)
{
return rc;
}
}
rc = slapi_uniqueIDGenerateFromName (&idGen, &idBase, name, namelen);
if (rc != UID_SUCCESS)
{
return rc;
}
rc = slapi_uniqueIDFormat (&idGen, uId);
return rc;
}
/* helper fumctions */
static int validDir(const char *configDir){
PRDir* dir;
/* empty string means this directory */
if (strlen(configDir) == 0)
return 1;
dir = PR_OpenDir(configDir);
if (dir){
PR_CloseDir (dir);
return 1;
}
return 0;
}
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