first public release of samba4 code

(This used to be commit b0510b5428)

source4/libads/ldap_utils.c

@@ -0,0 +1,96 @@
+/* 
+   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
+*/
+ADS_STATUS ads_do_search_retry(ADS_STRUCT *ads, const char *bind_path, int scope, 
+			       const char *exp,
+			       const char **attrs, void **res)
+{
+	ADS_STATUS status;
+	int count = 3;
+	char *bp;
+
+	if (!ads->ld &&
+	    time(NULL) - ads->last_attempt < ADS_RECONNECT_TIME) {
+		return ADS_ERROR(LDAP_SERVER_DOWN);
+	}
+
+	bp = strdup(bind_path);
+
+	if (!bp) 
+		return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
+
+	while (count--) {
+		status = ads_do_search_all(ads, bp, scope, exp, attrs, res);
+		if (ADS_ERR_OK(status)) {
+			DEBUG(5,("Search for %s gave %d replies\n",
+				 exp, ads_count_replies(ads, *res)));
+			free(bp);
+			return status;
+		}
+
+		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);
+			free(bp);
+			return status;
+		}
+	}
+	free(bp);
+
+	DEBUG(1,("ads reopen failed after error %s\n", ads_errstr(status)));
+	return status;
+}
+
+
+ADS_STATUS ads_search_retry(ADS_STRUCT *ads, void **res, 
+			    const char *exp, 
+			    const char **attrs)
+{
+	return ads_do_search_retry(ads, ads->config.bind_path, LDAP_SCOPE_SUBTREE,
+				   exp, attrs, res);
+}
+
+ADS_STATUS ads_search_retry_dn(ADS_STRUCT *ads, void **res, 
+			       const char *dn, 
+			       const char **attrs)
+{
+	return ads_do_search_retry(ads, dn, LDAP_SCOPE_BASE,
+				   "(objectclass=*)", attrs, res);
+}
+#endif