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/*
Unix SMB/CIFS implementation.
ID Mapping
Copyright (C) Tim Potter 2000
Copyright (C) Anthony Liguori <aliguor@us.ibm.com> 2003
Copyright (C) Simo Sorce 2003
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.*/
#include "includes.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_IDMAP
struct idmap_function_entry {
const char *name;
struct idmap_methods *methods;
struct idmap_function_entry *prev,*next;
};
static struct idmap_function_entry *backends = NULL;
static struct idmap_methods *local_map;
static struct idmap_methods *remote_map;
static void lazy_initialize_idmap(void)
{
static BOOL initialized = False;
if(!initialized) {
idmap_init();
initialized = True;
}
}
static struct idmap_methods *get_methods(const char *name)
{
struct idmap_function_entry *entry = backends;
while(entry) {
if (strcmp(entry->name, name) == 0) return entry->methods;
entry = entry->next;
}
return NULL;
}
NTSTATUS smb_register_idmap(int version, const char *name, struct idmap_methods *methods)
{
struct idmap_function_entry *entry;
if ((version != SMB_IDMAP_INTERFACE_VERSION)) {
DEBUG(0, ("Failed to register idmap module.\n"
"The module was compiled against SMB_IDMAP_INTERFACE_VERSION %d,\n"
"current SMB_IDMAP_INTERFACE_VERSION is %d.\n"
"Please recompile against the current version of samba!\n",
version, SMB_IDMAP_INTERFACE_VERSION));
return NT_STATUS_OBJECT_TYPE_MISMATCH;
}
if (!name || !name[0] || !methods) {
DEBUG(0,("smb_register_idmap() called with NULL pointer or empty name!\n"));
return NT_STATUS_INVALID_PARAMETER;
}
if (get_methods(name)) {
DEBUG(0,("idmap module %s already registered!\n", name));
return NT_STATUS_OBJECT_NAME_COLLISION;
}
entry = smb_xmalloc(sizeof(struct idmap_function_entry));
entry->name = smb_xstrdup(name);
entry->methods = methods;
DLIST_ADD(backends, entry);
DEBUG(5, ("Successfully added idmap backend '%s'\n", name));
return NT_STATUS_OK;
}
/* Initialize backend */
BOOL idmap_init(void)
{
const char *remote_backend = lp_idmap_backend();
if (!backends)
static_init_idmap;
if (!local_map) {
local_map = get_methods("tdb");
if (!local_map) {
DEBUG(0, ("idmap_init: could not find tdb backend!\n"));
return False;
}
if (!NT_STATUS_IS_OK(local_map->init( NULL ))) {
DEBUG(0, ("idmap_init: could not load or create local backend!\n"));
return False;
}
}
if (!remote_map && remote_backend && *remote_backend != 0) {
fstring params = "";
char *pparams;
/* get any mode parameters passed in */
if ( (pparams = strchr( remote_backend, ':' )) != NULL ) {
*pparams = '\0';
pparams++;
fstrcpy( params, pparams );
}
DEBUG(3, ("idmap_init: using '%s' as remote backend\n", remote_backend));
if((remote_map = get_methods(remote_backend)) ||
(NT_STATUS_IS_OK(smb_probe_module("idmap", remote_backend)) &&
(remote_map = get_methods(remote_backend)))) {
remote_map->init(params);
} else {
DEBUG(0, ("idmap_init: could not load remote backend '%s'\n", remote_backend));
return False;
}
}
return True;
}
NTSTATUS idmap_set_mapping(const DOM_SID *sid, unid_t id, int id_type)
{
NTSTATUS ret;
lazy_initialize_idmap();
ret = local_map->set_mapping(sid, id, id_type);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG (0, ("idmap_set_mapping: Error, unable to modify local cache!\n"));
DEBUGADD(0, ("Error: %s", nt_errstr(ret)));
return ret;
}
/* Being able to update the remote cache is seldomly right.
Generally this is a forbidden operation. */
if (!(id_type & ID_CACHE) && (remote_map != NULL)) {
remote_map->set_mapping(sid, id, id_type);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG (0, ("idmap_set_mapping: Error, unable to modify remote cache!\n"));
DEBUGADD(0, ("Error: %s", nt_errstr(ret)));
}
}
return ret;
}
/* Get ID from SID */
NTSTATUS idmap_get_id_from_sid(unid_t *id, int *id_type, const DOM_SID *sid)
{
NTSTATUS ret;
int loc_type;
lazy_initialize_idmap();
loc_type = *id_type;
if (remote_map) { /* We have a central remote idmap */
loc_type |= ID_NOMAP;
}
ret = local_map->get_id_from_sid(id, &loc_type, sid);
if (!NT_STATUS_IS_OK(ret)) {
if (remote_map) {
ret = remote_map->get_id_from_sid(id, id_type, sid);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(3, ("idmap_get_id_from_sid: error fetching id!\n"));
return ret;
} else {
loc_type |= ID_CACHE;
idmap_set_mapping(sid, *id, loc_type);
}
}
} else {
*id_type = loc_type & ID_TYPEMASK;
}
return ret;
}
/* Get SID from ID */
NTSTATUS idmap_get_sid_from_id(DOM_SID *sid, unid_t id, int id_type)
{
NTSTATUS ret;
int loc_type;
lazy_initialize_idmap();
loc_type = id_type;
if (remote_map) {
loc_type = id_type | ID_NOMAP;
}
ret = local_map->get_sid_from_id(sid, id, loc_type);
if (!NT_STATUS_IS_OK(ret)) {
if (remote_map) {
ret = remote_map->get_sid_from_id(sid, id, id_type);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(3, ("idmap_get_sid_from_id: unable to fetch sid!\n"));
return ret;
} else {
loc_type |= ID_CACHE;
idmap_set_mapping(sid, id, loc_type);
}
}
}
return ret;
}
/* Close backend */
NTSTATUS idmap_close(void)
{
NTSTATUS ret;
ret = local_map->close();
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(3, ("idmap_close: failed to close local cache!\n"));
}
if (remote_map) {
ret = remote_map->close();
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(3, ("idmap_close: failed to close remote idmap repository!\n"));
}
}
return ret;
}
/* Dump backend status */
void idmap_status(void)
{
lazy_initialize_idmap();
local_map->status();
if (remote_map) remote_map->status();
}
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