1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
/*
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 in <%s> gave %d replies\n",
expr, bp, 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
|
