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/*
Unix SMB/CIFS implementation.
Some Helpful wrappers on LDAP
Copyright (C) Andrew Tridgell 2001
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"
#ifdef HAVE_LDAP
/*
a wrapper around ldap_search_s that retries depending on the error code
this is supposed to catch dropped connections and auto-reconnect
*/
static ADS_STATUS ads_do_search_retry_internal(ADS_STRUCT *ads, const char *bind_path, int scope,
const char *expr,
const char **attrs, void *args,
LDAPMessage **res)
{
ADS_STATUS status = ADS_SUCCESS;
int count = 3;
char *bp;
*res = NULL;
if (!ads->ld &&
time(NULL) - ads->last_attempt < ADS_RECONNECT_TIME) {
return ADS_ERROR(LDAP_SERVER_DOWN);
}
bp = SMB_STRDUP(bind_path);
if (!bp) {
return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
}
*res = NULL;
/* when binding anonymously, we cannot use the paged search LDAP
* control - Guenther */
if (ads->auth.flags & ADS_AUTH_ANON_BIND) {
status = ads_do_search(ads, bp, scope, expr, attrs, res);
} else {
status = ads_do_search_all_args(ads, bp, scope, expr, attrs, args, res);
}
if (ADS_ERR_OK(status)) {
DEBUG(5,("Search for %s gave %d replies\n",
expr, ads_count_replies(ads, *res)));
SAFE_FREE(bp);
return status;
}
while (--count) {
if (*res)
ads_msgfree(ads, *res);
*res = NULL;
DEBUG(3,("Reopening ads connection to realm '%s' after error %s\n",
ads->config.realm, ads_errstr(status)));
if (ads->ld) {
ldap_unbind(ads->ld);
}
ads->ld = NULL;
status = ads_connect(ads);
if (!ADS_ERR_OK(status)) {
DEBUG(1,("ads_search_retry: failed to reconnect (%s)\n",
ads_errstr(status)));
ads_destroy(&ads);
SAFE_FREE(bp);
return status;
}
*res = NULL;
/* when binding anonymously, we cannot use the paged search LDAP
* control - Guenther */
if (ads->auth.flags & ADS_AUTH_ANON_BIND) {
status = ads_do_search(ads, bp, scope, expr, attrs, res);
} else {
status = ads_do_search_all_args(ads, bp, scope, expr, attrs, args, res);
}
if (ADS_ERR_OK(status)) {
DEBUG(5,("Search for filter: %s, base: %s gave %d replies\n",
expr, bp, ads_count_replies(ads, *res)));
SAFE_FREE(bp);
return status;
}
}
SAFE_FREE(bp);
if (!ADS_ERR_OK(status))
DEBUG(1,("ads reopen failed after error %s\n",
ads_errstr(status)));
return status;
}
ADS_STATUS ads_do_search_retry(ADS_STRUCT *ads, const char *bind_path,
int scope, const char *expr,
const char **attrs, LDAPMessage **res)
{
return ads_do_search_retry_internal(ads, bind_path, scope, expr, attrs, NULL, res);
}
ADS_STATUS ads_do_search_retry_args(ADS_STRUCT *ads, const char *bind_path,
int scope, const char *expr,
const char **attrs, void *args,
LDAPMessage **res)
{
return ads_do_search_retry_internal(ads, bind_path, scope, expr, attrs, args, res);
}
ADS_STATUS ads_search_retry(ADS_STRUCT *ads, LDAPMessage **res,
const char *expr, const char **attrs)
{
return ads_do_search_retry(ads, ads->config.bind_path, LDAP_SCOPE_SUBTREE,
expr, attrs, res);
}
ADS_STATUS ads_search_retry_dn(ADS_STRUCT *ads, LDAPMessage **res,
const char *dn,
const char **attrs)
{
return ads_do_search_retry(ads, dn, LDAP_SCOPE_BASE,
"(objectclass=*)", attrs, res);
}
ADS_STATUS ads_search_retry_extended_dn(ADS_STRUCT *ads, LDAPMessage **res,
const char *dn,
const char **attrs,
enum ads_extended_dn_flags flags)
{
ads_control args;
args.control = ADS_EXTENDED_DN_OID;
args.val = flags;
args.critical = True;
return ads_do_search_retry_args(ads, dn, LDAP_SCOPE_BASE,
"(objectclass=*)", attrs, &args, res);
}
ADS_STATUS ads_search_retry_sid(ADS_STRUCT *ads, LDAPMessage **res,
const DOM_SID *sid,
const char **attrs)
{
char *dn, *sid_string;
ADS_STATUS status;
sid_string = sid_binstring_hex(sid);
if (sid_string == NULL) {
return ADS_ERROR(LDAP_NO_MEMORY);
}
if (!asprintf(&dn, "<SID=%s>", sid_string)) {
SAFE_FREE(sid_string);
return ADS_ERROR(LDAP_NO_MEMORY);
}
status = ads_do_search_retry(ads, dn, LDAP_SCOPE_BASE,
"(objectclass=*)", attrs, res);
SAFE_FREE(dn);
SAFE_FREE(sid_string);
return status;
}
#endif
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