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/*
Unix SMB/CIFS implementation.
DNS utility library
Copyright (C) Gerald (Jerry) Carter 2006.
Copyright (C) Jeremy Allison 2007.
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "libads/sitename_cache.h"
#include "lib/gencache.h"
/****************************************************************************
Store and fetch the AD client sitename.
****************************************************************************/
#define SITENAME_KEY "AD_SITENAME/DOMAIN/%s"
static char *sitename_key(TALLOC_CTX *mem_ctx, const char *realm)
{
char *keystr = talloc_asprintf_strupper_m(
mem_ctx, SITENAME_KEY, realm);
return keystr;
}
/****************************************************************************
Store the AD client sitename.
We store indefinately as every new CLDAP query will re-write this.
****************************************************************************/
bool sitename_store(const char *realm, const char *sitename)
{
time_t expire;
bool ret = False;
char *key;
if (!realm || (strlen(realm) == 0)) {
DEBUG(0,("sitename_store: no realm\n"));
return False;
}
key = sitename_key(talloc_tos(), realm);
if (!sitename || (sitename && !*sitename)) {
DEBUG(5,("sitename_store: deleting empty sitename!\n"));
ret = gencache_del(key);
TALLOC_FREE(key);
return ret;
}
expire = get_time_t_max(); /* Store indefinately. */
DEBUG(10,("sitename_store: realm = [%s], sitename = [%s], expire = [%u]\n",
realm, sitename, (unsigned int)expire ));
ret = gencache_set( key, sitename, expire );
TALLOC_FREE(key);
return ret;
}
/****************************************************************************
Fetch the AD client sitename.
Caller must free.
****************************************************************************/
char *sitename_fetch(TALLOC_CTX *mem_ctx, const char *realm)
{
char *sitename = NULL;
time_t timeout;
bool ret = False;
const char *query_realm;
char *key;
if (!realm || (strlen(realm) == 0)) {
query_realm = lp_realm();
} else {
query_realm = realm;
}
key = sitename_key(talloc_tos(), query_realm);
ret = gencache_get( key, mem_ctx, &sitename, &timeout );
TALLOC_FREE(key);
if ( !ret ) {
DBG_INFO("No stored sitename for realm '%s'\n", query_realm);
} else {
DBG_INFO("Returning sitename for realm '%s': \"%s\"\n",
query_realm, sitename);
}
return sitename;
}
/****************************************************************************
Did the sitename change ?
****************************************************************************/
bool stored_sitename_changed(const char *realm, const char *sitename)
{
bool ret = False;
char *new_sitename;
if (!realm || (strlen(realm) == 0)) {
DEBUG(0,("stored_sitename_changed: no realm\n"));
return False;
}
new_sitename = sitename_fetch(talloc_tos(), realm);
if (sitename && new_sitename && !strequal(sitename, new_sitename)) {
ret = True;
} else if ((sitename && !new_sitename) ||
(!sitename && new_sitename)) {
ret = True;
}
TALLOC_FREE(new_sitename);
return ret;
}
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