Add ldap connection timeout for OpenLDAP and Netscape LDAP libs. This can be controll...
[ira/wip.git] / source3 / lib / smbldap.c
1 /* 
2    Unix SMB/CIFS implementation.
3    LDAP protocol helper functions for SAMBA
4    Copyright (C) Jean Fran├žois Micouleau       1998
5    Copyright (C) Gerald Carter                  2001-2003
6    Copyright (C) Shahms King                    2001
7    Copyright (C) Andrew Bartlett                2002-2003
8    Copyright (C) Stefan (metze) Metzmacher      2002-2003
9     
10    This program is free software; you can redistribute it and/or modify
11    it under the terms of the GNU General Public License as published by
12    the Free Software Foundation; either version 3 of the License, or
13    (at your option) any later version.
14    
15    This program is distributed in the hope that it will be useful,
16    but WITHOUT ANY WARRANTY; without even the implied warranty of
17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18    GNU General Public License for more details.
19    
20    You should have received a copy of the GNU General Public License
21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
22    
23 */
24
25 #include "includes.h"
26 #include "smbldap.h"
27
28 #ifndef LDAP_OPT_SUCCESS
29 #define LDAP_OPT_SUCCESS 0
30 #endif
31
32 /* Try not to hit the up or down server forever */
33
34 #define SMBLDAP_DONT_PING_TIME 10       /* ping only all 10 seconds */
35 #define SMBLDAP_NUM_RETRIES 8           /* retry only 8 times */
36
37 #define SMBLDAP_IDLE_TIME 150           /* After 2.5 minutes disconnect */
38
39
40 /* attributes used by Samba 2.2 */
41
42 ATTRIB_MAP_ENTRY attrib_map_v22[] = {
43         { LDAP_ATTR_UID,                "uid"           },
44         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
45         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
46         { LDAP_ATTR_UNIX_HOME,          "homeDirectory" },
47         { LDAP_ATTR_PWD_LAST_SET,       "pwdLastSet"    },
48         { LDAP_ATTR_PWD_CAN_CHANGE,     "pwdCanChange"  },
49         { LDAP_ATTR_PWD_MUST_CHANGE,    "pwdMustChange" },
50         { LDAP_ATTR_LOGON_TIME,         "logonTime"     },
51         { LDAP_ATTR_LOGOFF_TIME,        "logoffTime"    },
52         { LDAP_ATTR_KICKOFF_TIME,       "kickoffTime"   },
53         { LDAP_ATTR_CN,                 "cn"            },
54         { LDAP_ATTR_SN,                 "sn"            },
55         { LDAP_ATTR_DISPLAY_NAME,       "displayName"   },
56         { LDAP_ATTR_HOME_PATH,          "smbHome"       },
57         { LDAP_ATTR_HOME_DRIVE,         "homeDrive"     },
58         { LDAP_ATTR_LOGON_SCRIPT,       "scriptPath"    },
59         { LDAP_ATTR_PROFILE_PATH,       "profilePath"   },
60         { LDAP_ATTR_DESC,               "description"   },
61         { LDAP_ATTR_USER_WKS,           "userWorkstations"},
62         { LDAP_ATTR_USER_RID,           "rid"           },
63         { LDAP_ATTR_PRIMARY_GROUP_RID,  "primaryGroupID"},
64         { LDAP_ATTR_LMPW,               "lmPassword"    },
65         { LDAP_ATTR_NTPW,               "ntPassword"    },
66         { LDAP_ATTR_DOMAIN,             "domain"        },
67         { LDAP_ATTR_OBJCLASS,           "objectClass"   },
68         { LDAP_ATTR_ACB_INFO,           "acctFlags"     },
69         { LDAP_ATTR_MOD_TIMESTAMP,      "modifyTimestamp"       },
70         { LDAP_ATTR_LIST_END,           NULL            }
71 };
72
73 ATTRIB_MAP_ENTRY attrib_map_to_delete_v22[] = {
74         { LDAP_ATTR_PWD_LAST_SET,       "pwdLastSet"    },
75         { LDAP_ATTR_PWD_CAN_CHANGE,     "pwdCanChange"  },
76         { LDAP_ATTR_PWD_MUST_CHANGE,    "pwdMustChange" },
77         { LDAP_ATTR_LOGON_TIME,         "logonTime"     },
78         { LDAP_ATTR_LOGOFF_TIME,        "logoffTime"    },
79         { LDAP_ATTR_KICKOFF_TIME,       "kickoffTime"   },
80         { LDAP_ATTR_DISPLAY_NAME,       "displayName"   },
81         { LDAP_ATTR_HOME_PATH,          "smbHome"       },
82         { LDAP_ATTR_HOME_DRIVE,         "homeDrives"    },
83         { LDAP_ATTR_LOGON_SCRIPT,       "scriptPath"    },
84         { LDAP_ATTR_PROFILE_PATH,       "profilePath"   },
85         { LDAP_ATTR_USER_WKS,           "userWorkstations"},
86         { LDAP_ATTR_USER_RID,           "rid"           },
87         { LDAP_ATTR_PRIMARY_GROUP_RID,  "primaryGroupID"},
88         { LDAP_ATTR_LMPW,               "lmPassword"    },
89         { LDAP_ATTR_NTPW,               "ntPassword"    },
90         { LDAP_ATTR_DOMAIN,             "domain"        },
91         { LDAP_ATTR_ACB_INFO,           "acctFlags"     },
92         { LDAP_ATTR_LIST_END,           NULL            }
93 };
94
95 /* attributes used by Samba 3.0's sambaSamAccount */
96
97 ATTRIB_MAP_ENTRY attrib_map_v30[] = {
98         { LDAP_ATTR_UID,                "uid"                   },
99         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
100         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
101         { LDAP_ATTR_UNIX_HOME,          "homeDirectory"         },
102         { LDAP_ATTR_PWD_LAST_SET,       "sambaPwdLastSet"       },
103         { LDAP_ATTR_PWD_CAN_CHANGE,     "sambaPwdCanChange"     },
104         { LDAP_ATTR_PWD_MUST_CHANGE,    "sambaPwdMustChange"    },
105         { LDAP_ATTR_LOGON_TIME,         "sambaLogonTime"        },
106         { LDAP_ATTR_LOGOFF_TIME,        "sambaLogoffTime"       },
107         { LDAP_ATTR_KICKOFF_TIME,       "sambaKickoffTime"      },
108         { LDAP_ATTR_CN,                 "cn"                    },
109         { LDAP_ATTR_SN,                 "sn"                    },
110         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
111         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
112         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
113         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
114         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
115         { LDAP_ATTR_DESC,               "description"           },
116         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
117         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
118         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
119         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
120         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
121         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
122         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
123         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
124         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
125         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
126         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
127         { LDAP_ATTR_PWD_HISTORY,        "sambaPasswordHistory"  },
128         { LDAP_ATTR_MOD_TIMESTAMP,      "modifyTimestamp"       },
129         { LDAP_ATTR_LOGON_HOURS,        "sambaLogonHours"       },
130         { LDAP_ATTR_LIST_END,           NULL                    }
131 };
132
133 ATTRIB_MAP_ENTRY attrib_map_to_delete_v30[] = {
134         { LDAP_ATTR_PWD_LAST_SET,       "sambaPwdLastSet"       },
135         { LDAP_ATTR_PWD_CAN_CHANGE,     "sambaPwdCanChange"     },
136         { LDAP_ATTR_PWD_MUST_CHANGE,    "sambaPwdMustChange"    },
137         { LDAP_ATTR_LOGON_TIME,         "sambaLogonTime"        },
138         { LDAP_ATTR_LOGOFF_TIME,        "sambaLogoffTime"       },
139         { LDAP_ATTR_KICKOFF_TIME,       "sambaKickoffTime"      },
140         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
141         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
142         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
143         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
144         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
145         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
146         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
147         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
148         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
149         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
150         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
151         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
152         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
153         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
154         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
155         { LDAP_ATTR_PWD_HISTORY,        "sambaPasswordHistory"  },
156         { LDAP_ATTR_LOGON_HOURS,        "sambaLogonHours"       },
157         { LDAP_ATTR_LIST_END,           NULL                    }
158 };
159
160 /* attributes used for allocating RIDs */
161
162 ATTRIB_MAP_ENTRY dominfo_attr_list[] = {
163         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
164         { LDAP_ATTR_NEXT_RID,           "sambaNextRid"          },
165         { LDAP_ATTR_NEXT_USERRID,       "sambaNextUserRid"      },
166         { LDAP_ATTR_NEXT_GROUPRID,      "sambaNextGroupRid"     },
167         { LDAP_ATTR_DOM_SID,            LDAP_ATTRIBUTE_SID      },
168         { LDAP_ATTR_ALGORITHMIC_RID_BASE,"sambaAlgorithmicRidBase"},
169         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
170         { LDAP_ATTR_LIST_END,           NULL                    },
171 };
172
173 /* Samba 3.0 group mapping attributes */
174
175 ATTRIB_MAP_ENTRY groupmap_attr_list[] = {
176         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
177         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
178         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
179         { LDAP_ATTR_SID_LIST,           "sambaSIDList"          },
180         { LDAP_ATTR_DESC,               "description"           },
181         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
182         { LDAP_ATTR_CN,                 "cn"                    },
183         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
184         { LDAP_ATTR_LIST_END,           NULL                    }       
185 };
186
187 ATTRIB_MAP_ENTRY groupmap_attr_list_to_delete[] = {
188         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
189         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
190         { LDAP_ATTR_DESC,               "description"           },
191         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
192         { LDAP_ATTR_SID_LIST,           "sambaSIDList"          },
193         { LDAP_ATTR_LIST_END,           NULL                    }       
194 };
195
196 /* idmap_ldap sambaUnixIdPool */
197
198 ATTRIB_MAP_ENTRY idpool_attr_list[] = {
199         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
200         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
201         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
202         { LDAP_ATTR_LIST_END,           NULL                    }       
203 };
204
205 ATTRIB_MAP_ENTRY sidmap_attr_list[] = {
206         { LDAP_ATTR_SID,                LDAP_ATTRIBUTE_SID      },
207         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
208         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
209         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
210         { LDAP_ATTR_LIST_END,           NULL                    }       
211 };
212
213 /**********************************************************************
214  perform a simple table lookup and return the attribute name 
215  **********************************************************************/
216  
217  const char* get_attr_key2string( ATTRIB_MAP_ENTRY table[], int key )
218 {
219         int i = 0;
220         
221         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
222                 if ( table[i].attrib == key )
223                         return table[i].name;
224                 i++;
225         }
226         
227         return NULL;
228 }
229
230
231 /**********************************************************************
232  Return the list of attribute names from a mapping table
233  **********************************************************************/
234
235  const char** get_attr_list( TALLOC_CTX *mem_ctx, ATTRIB_MAP_ENTRY table[] )
236 {
237         const char **names;
238         int i = 0;
239         
240         while ( table[i].attrib != LDAP_ATTR_LIST_END )
241                 i++;
242         i++;
243
244         names = TALLOC_ARRAY( mem_ctx, const char*, i );
245         if ( !names ) {
246                 DEBUG(0,("get_attr_list: out of memory\n"));
247                 return NULL;
248         }
249
250         i = 0;
251         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
252                 names[i] = talloc_strdup( names, table[i].name );
253                 i++;
254         }
255         names[i] = NULL;
256         
257         return names;
258 }
259
260 /*******************************************************************
261  Search an attribute and return the first value found.
262 ******************************************************************/
263
264  bool smbldap_get_single_attribute (LDAP * ldap_struct, LDAPMessage * entry,
265                                     const char *attribute, char *value,
266                                     int max_len)
267 {
268         char **values;
269         
270         if ( !attribute )
271                 return False;
272                 
273         value[0] = '\0';
274
275         if ((values = ldap_get_values (ldap_struct, entry, attribute)) == NULL) {
276                 DEBUG (10, ("smbldap_get_single_attribute: [%s] = [<does not exist>]\n", attribute));
277                 
278                 return False;
279         }
280         
281         if (convert_string(CH_UTF8, CH_UNIX,values[0], -1, value, max_len, False) == (size_t)-1) {
282                 DEBUG(1, ("smbldap_get_single_attribute: string conversion of [%s] = [%s] failed!\n", 
283                           attribute, values[0]));
284                 ldap_value_free(values);
285                 return False;
286         }
287         
288         ldap_value_free(values);
289 #ifdef DEBUG_PASSWORDS
290         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n", attribute, value));
291 #endif  
292         return True;
293 }
294
295  char * smbldap_talloc_single_attribute(LDAP *ldap_struct, LDAPMessage *entry,
296                                         const char *attribute,
297                                         TALLOC_CTX *mem_ctx)
298 {
299         char **values;
300         char *result;
301         size_t converted_size;
302
303         if (attribute == NULL) {
304                 return NULL;
305         }
306
307         values = ldap_get_values(ldap_struct, entry, attribute);
308
309         if (values == NULL) {
310                 DEBUG(10, ("attribute %s does not exist\n", attribute));
311                 return NULL;
312         }
313
314         if (ldap_count_values(values) != 1) {
315                 DEBUG(10, ("attribute %s has %d values, expected only one\n",
316                            attribute, ldap_count_values(values)));
317                 ldap_value_free(values);
318                 return NULL;
319         }
320
321         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
322                 DEBUG(10, ("pull_utf8_talloc failed\n"));
323                 ldap_value_free(values);
324                 return NULL;
325         }
326
327         ldap_value_free(values);
328
329 #ifdef DEBUG_PASSWORDS
330         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
331                      attribute, result));
332 #endif  
333         return result;
334 }
335
336  static int ldapmsg_destructor(LDAPMessage **result) {
337         ldap_msgfree(*result);
338         return 0;
339 }
340
341  void talloc_autofree_ldapmsg(TALLOC_CTX *mem_ctx, LDAPMessage *result)
342 {
343         LDAPMessage **handle;
344
345         if (result == NULL) {
346                 return;
347         }
348
349         handle = TALLOC_P(mem_ctx, LDAPMessage *);
350         SMB_ASSERT(handle != NULL);
351
352         *handle = result;
353         talloc_set_destructor(handle, ldapmsg_destructor);
354 }
355
356  static int ldapmod_destructor(LDAPMod ***mod) {
357         ldap_mods_free(*mod, True);
358         return 0;
359 }
360
361  void talloc_autofree_ldapmod(TALLOC_CTX *mem_ctx, LDAPMod **mod)
362 {
363         LDAPMod ***handle;
364
365         if (mod == NULL) {
366                 return;
367         }
368
369         handle = TALLOC_P(mem_ctx, LDAPMod **);
370         SMB_ASSERT(handle != NULL);
371
372         *handle = mod;
373         talloc_set_destructor(handle, ldapmod_destructor);
374 }
375
376 /************************************************************************
377  Routine to manage the LDAPMod structure array
378  manage memory used by the array, by each struct, and values
379  ***********************************************************************/
380
381  void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
382 {
383         LDAPMod **mods;
384         int i;
385         int j;
386
387         mods = *modlist;
388
389         /* sanity checks on the mod values */
390
391         if (attribute == NULL || *attribute == '\0') {
392                 return; 
393         }
394
395 #if 0   /* commented out after discussion with abartlet.  Do not reenable.
396            left here so other do not re-add similar code   --jerry */
397         if (value == NULL || *value == '\0')
398                 return;
399 #endif
400
401         if (mods == NULL) {
402                 mods = SMB_MALLOC_P(LDAPMod *);
403                 if (mods == NULL) {
404                         smb_panic("smbldap_set_mod: out of memory!");
405                         /* notreached. */
406                 }
407                 mods[0] = NULL;
408         }
409
410         for (i = 0; mods[i] != NULL; ++i) {
411                 if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
412                         break;
413         }
414
415         if (mods[i] == NULL) {
416                 mods = SMB_REALLOC_ARRAY (mods, LDAPMod *, i + 2);
417                 if (mods == NULL) {
418                         smb_panic("smbldap_set_mod: out of memory!");
419                         /* notreached. */
420                 }
421                 mods[i] = SMB_MALLOC_P(LDAPMod);
422                 if (mods[i] == NULL) {
423                         smb_panic("smbldap_set_mod: out of memory!");
424                         /* notreached. */
425                 }
426                 mods[i]->mod_op = modop;
427                 mods[i]->mod_values = NULL;
428                 mods[i]->mod_type = SMB_STRDUP(attribute);
429                 mods[i + 1] = NULL;
430         }
431
432         if (value != NULL) {
433                 char *utf8_value = NULL;
434                 size_t converted_size;
435
436                 j = 0;
437                 if (mods[i]->mod_values != NULL) {
438                         for (; mods[i]->mod_values[j] != NULL; j++);
439                 }
440                 mods[i]->mod_values = SMB_REALLOC_ARRAY(mods[i]->mod_values, char *, j + 2);
441                                                
442                 if (mods[i]->mod_values == NULL) {
443                         smb_panic("smbldap_set_mod: out of memory!");
444                         /* notreached. */
445                 }
446
447                 if (!push_utf8_allocate(&utf8_value, value, &converted_size)) {
448                         smb_panic("smbldap_set_mod: String conversion failure!");
449                         /* notreached. */
450                 }
451
452                 mods[i]->mod_values[j] = utf8_value;
453
454                 mods[i]->mod_values[j + 1] = NULL;
455         }
456         *modlist = mods;
457 }
458
459 /**********************************************************************
460   Set attribute to newval in LDAP, regardless of what value the
461   attribute had in LDAP before.
462 *********************************************************************/
463
464  void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
465                       LDAPMod ***mods,
466                       const char *attribute, const char *newval)
467 {
468         char oldval[2048]; /* current largest allowed value is mungeddial */
469         bool existed;
470
471         if (attribute == NULL) {
472                 /* This can actually happen for ldapsam_compat where we for
473                  * example don't have a password history */
474                 return;
475         }
476
477         if (existing != NULL) {
478                 existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
479         } else {
480                 existed = False;
481                 *oldval = '\0';
482         }
483
484         /* all of our string attributes are case insensitive */
485         
486         if (existed && newval && (StrCaseCmp(oldval, newval) == 0)) {
487                 
488                 /* Believe it or not, but LDAP will deny a delete and
489                    an add at the same time if the values are the
490                    same... */
491                 DEBUG(10,("smbldap_make_mod: attribute |%s| not changed.\n", attribute));
492                 return;
493         }
494
495         if (existed) {
496                 /* There has been no value before, so don't delete it.
497                  * Here's a possible race: We might end up with
498                  * duplicate attributes */
499                 /* By deleting exactly the value we found in the entry this
500                  * should be race-free in the sense that the LDAP-Server will
501                  * deny the complete operation if somebody changed the
502                  * attribute behind our back. */
503                 /* This will also allow modifying single valued attributes 
504                  * in Novell NDS. In NDS you have to first remove attribute and then
505                  * you could add new value */
506                 
507                 DEBUG(10,("smbldap_make_mod: deleting attribute |%s| values |%s|\n", attribute, oldval));
508                 smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
509         }
510
511         /* Regardless of the real operation (add or modify)
512            we add the new value here. We rely on deleting
513            the old value, should it exist. */
514
515         if ((newval != NULL) && (strlen(newval) > 0)) {
516                 DEBUG(10,("smbldap_make_mod: adding attribute |%s| value |%s|\n", attribute, newval));
517                 smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
518         }
519 }
520
521 /**********************************************************************
522  Some varients of the LDAP rebind code do not pass in the third 'arg' 
523  pointer to a void*, so we try and work around it by assuming that the 
524  value of the 'LDAP *' pointer is the same as the one we had passed in
525  **********************************************************************/
526
527 struct smbldap_state_lookup {
528         LDAP *ld;
529         struct smbldap_state *smbldap_state;
530         struct smbldap_state_lookup *prev, *next;
531 };
532
533 static struct smbldap_state_lookup *smbldap_state_lookup_list;
534
535 static struct smbldap_state *smbldap_find_state(LDAP *ld) 
536 {
537         struct smbldap_state_lookup *t;
538
539         for (t = smbldap_state_lookup_list; t; t = t->next) {
540                 if (t->ld == ld) {
541                         return t->smbldap_state;
542                 }
543         }
544         return NULL;
545 }
546
547 static void smbldap_delete_state(struct smbldap_state *smbldap_state) 
548 {
549         struct smbldap_state_lookup *t;
550
551         for (t = smbldap_state_lookup_list; t; t = t->next) {
552                 if (t->smbldap_state == smbldap_state) {
553                         DLIST_REMOVE(smbldap_state_lookup_list, t);
554                         SAFE_FREE(t);
555                         return;
556                 }
557         }
558 }
559
560 static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state) 
561 {
562         struct smbldap_state *tmp_ldap_state;
563         struct smbldap_state_lookup *t;
564         
565         if ((tmp_ldap_state = smbldap_find_state(ld))) {
566                 SMB_ASSERT(tmp_ldap_state == smbldap_state);
567                 return;
568         }
569
570         t = SMB_XMALLOC_P(struct smbldap_state_lookup);
571         ZERO_STRUCTP(t);
572         
573         DLIST_ADD_END(smbldap_state_lookup_list, t, struct smbldap_state_lookup *);
574         t->ld = ld;
575         t->smbldap_state = smbldap_state;
576 }
577
578 /********************************************************************
579  start TLS on an existing LDAP connection
580 *******************************************************************/
581
582 int smb_ldap_start_tls(LDAP *ldap_struct, int version)
583
584         int rc;
585         
586         if (lp_ldap_ssl() != LDAP_SSL_START_TLS) {
587                 return LDAP_SUCCESS;
588         }
589         
590 #ifdef LDAP_OPT_X_TLS
591         if (version != LDAP_VERSION3) {
592                 DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
593                 return LDAP_OPERATIONS_ERROR;
594         }
595
596         if ((rc = ldap_start_tls_s (ldap_struct, NULL, NULL)) != LDAP_SUCCESS)  {
597                 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
598                          ldap_err2string(rc)));
599                 return rc;
600         }
601
602         DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
603         return LDAP_SUCCESS;
604 #else
605         DEBUG(0,("StartTLS not supported by LDAP client libraries!\n"));
606         return LDAP_OPERATIONS_ERROR;
607 #endif
608 }
609
610 /********************************************************************
611  setup a connection to the LDAP server based on a uri
612 *******************************************************************/
613
614 int smb_ldap_setup_conn(LDAP **ldap_struct, const char *uri)
615 {
616         int rc;
617
618         DEBUG(10, ("smb_ldap_setup_connection: %s\n", uri));
619         
620 #ifdef HAVE_LDAP_INITIALIZE
621         
622         rc = ldap_initialize(ldap_struct, uri);
623         if (rc) {
624                 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
625         }
626
627         return rc;
628 #else 
629
630         /* Parse the string manually */
631
632         {
633                 int port = 0;
634                 fstring protocol;
635                 fstring host;
636                 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
637
638
639                 /* skip leading "URL:" (if any) */
640                 if ( strnequal( uri, "URL:", 4 ) ) {
641                         uri += 4;
642                 }
643                 
644                 sscanf(uri, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
645                 
646                 if (port == 0) {
647                         if (strequal(protocol, "ldap")) {
648                                 port = LDAP_PORT;
649                         } else if (strequal(protocol, "ldaps")) {
650                                 port = LDAPS_PORT;
651                         } else {
652                                 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
653                         }
654                 }
655                 
656                 if ((*ldap_struct = ldap_init(host, port)) == NULL)     {
657                         DEBUG(0, ("ldap_init failed !\n"));
658                         return LDAP_OPERATIONS_ERROR;
659                 }
660                 
661                 if (strequal(protocol, "ldaps")) {
662 #ifdef LDAP_OPT_X_TLS
663                         int tls = LDAP_OPT_X_TLS_HARD;
664                         if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
665                         {
666                                 DEBUG(0, ("Failed to setup a TLS session\n"));
667                         }
668                         
669                         DEBUG(3,("LDAPS option set...!\n"));
670 #else
671                         DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
672                         return LDAP_OPERATIONS_ERROR;
673 #endif /* LDAP_OPT_X_TLS */
674                 }
675         }
676 #endif /* HAVE_LDAP_INITIALIZE */
677
678
679         /* now set connection timeout */
680 #ifdef LDAP_X_OPT_CONNECT_TIMEOUT /* Netscape */
681         {
682                 int ct = lp_ldap_connection_timeout()*1000;
683                 rc = ldap_set_option(*ldap_struct, LDAP_X_OPT_CONNECT_TIMEOUT, &ct);
684                 if (rc != LDAP_SUCCESS) {
685                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
686                                 ct, ldap_err2string(rc)));
687                 }
688         }
689 #elif defined (LDAP_OPT_NETWORK_TIMEOUT) /* OpenLDAP */
690         {
691                 struct timeval ct;
692                 ct.tv_usec = 0;
693                 ct.tv_sec = lp_ldap_connection_timeout();
694                 rc = ldap_set_option(*ldap_struct, LDAP_OPT_NETWORK_TIMEOUT, &ct);
695                 if (rc != LDAP_SUCCESS) {
696                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
697                                 ct.tv_sec, ldap_err2string(rc)));
698                 }
699         }
700 #endif
701
702         return LDAP_SUCCESS;
703 }
704
705 /********************************************************************
706  try to upgrade to Version 3 LDAP if not already, in either case return current
707  version 
708  *******************************************************************/
709
710 int smb_ldap_upgrade_conn(LDAP *ldap_struct, int *new_version) 
711 {
712         int version;
713         int rc;
714         
715         /* assume the worst */
716         *new_version = LDAP_VERSION2;
717
718         rc = ldap_get_option(ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
719         if (rc) {
720                 return rc;
721         }
722
723         if (version == LDAP_VERSION3) {
724                 *new_version = LDAP_VERSION3;
725                 return LDAP_SUCCESS;
726         }
727
728         /* try upgrade */
729         version = LDAP_VERSION3;
730         rc = ldap_set_option (ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
731         if (rc) {
732                 return rc;
733         }
734                 
735         *new_version = LDAP_VERSION3;
736         return LDAP_SUCCESS;
737 }
738
739 /*******************************************************************
740  open a connection to the ldap server (just until the bind)
741  ******************************************************************/
742
743 int smb_ldap_setup_full_conn(LDAP **ldap_struct, const char *uri)
744 {
745         int rc, version;
746
747         rc = smb_ldap_setup_conn(ldap_struct, uri);
748         if (rc) {
749                 return rc;
750         }
751
752         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
753         if (rc) {
754                 return rc;
755         }
756
757         rc = smb_ldap_start_tls(*ldap_struct, version);
758         if (rc) {
759                 return rc;
760         }
761
762         return LDAP_SUCCESS;
763 }
764
765 /*******************************************************************
766  open a connection to the ldap server.
767 ******************************************************************/
768 static int smbldap_open_connection (struct smbldap_state *ldap_state)
769
770 {
771         int rc = LDAP_SUCCESS;
772         int version;
773         LDAP **ldap_struct = &ldap_state->ldap_struct;
774
775         rc = smb_ldap_setup_conn(ldap_struct, ldap_state->uri);
776         if (rc) {
777                 return rc;
778         }
779
780         /* Store the LDAP pointer in a lookup list */
781
782         smbldap_store_state(*ldap_struct, ldap_state);
783
784         /* Upgrade to LDAPv3 if possible */
785
786         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
787         if (rc) {
788                 return rc;
789         }
790
791         /* Start TLS if required */
792
793         rc = smb_ldap_start_tls(*ldap_struct, version);
794         if (rc) {
795                 return rc;
796         }
797         
798         DEBUG(2, ("smbldap_open_connection: connection opened\n"));
799         return rc;
800 }
801
802 /*******************************************************************
803  a rebind function for authenticated referrals
804  This version takes a void* that we can shove useful stuff in :-)
805 ******************************************************************/
806 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
807 #else
808 static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp, 
809                                    int *methodp, int freeit, void *arg)
810 {
811         struct smbldap_state *ldap_state = arg;
812         
813         /** @TODO Should we be doing something to check what servers we rebind to?
814             Could we get a referral to a machine that we don't want to give our
815             username and password to? */
816         
817         if (freeit) {
818                 SAFE_FREE(*whop);
819                 if (*credp) {
820                         memset(*credp, '\0', strlen(*credp));
821                 }
822                 SAFE_FREE(*credp);
823         } else {
824                 DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n", 
825                           ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
826
827                 if (ldap_state->anonymous) {
828                         *whop = NULL;
829                         *credp = NULL;
830                 } else {
831                         *whop = SMB_STRDUP(ldap_state->bind_dn);
832                         if (!*whop) {
833                                 return LDAP_NO_MEMORY;
834                         }
835                         *credp = SMB_STRDUP(ldap_state->bind_secret);
836                         if (!*credp) {
837                                 SAFE_FREE(*whop);
838                                 return LDAP_NO_MEMORY;
839                         }
840                 }
841                 *methodp = LDAP_AUTH_SIMPLE;
842         }
843
844         GetTimeOfDay(&ldap_state->last_rebind);
845                 
846         return 0;
847 }
848 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
849
850 /*******************************************************************
851  a rebind function for authenticated referrals
852  This version takes a void* that we can shove useful stuff in :-)
853  and actually does the connection.
854 ******************************************************************/
855 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
856 static int rebindproc_connect_with_state (LDAP *ldap_struct, 
857                                           LDAP_CONST char *url, 
858                                           ber_tag_t request,
859                                           ber_int_t msgid, void *arg)
860 {
861         struct smbldap_state *ldap_state =
862                 (struct smbldap_state *)arg;
863         int rc;
864         int version;
865
866         DEBUG(5,("rebindproc_connect_with_state: Rebinding to %s as \"%s\"\n", 
867                  url, ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
868
869         /* call START_TLS again (ldaps:// is handled by the OpenLDAP library
870          * itself) before rebinding to another LDAP server to avoid to expose
871          * our credentials. At least *try* to secure the connection - Guenther */
872
873         smb_ldap_upgrade_conn(ldap_struct, &version);
874         smb_ldap_start_tls(ldap_struct, version);
875
876         /** @TODO Should we be doing something to check what servers we rebind to?
877             Could we get a referral to a machine that we don't want to give our
878             username and password to? */
879
880         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
881
882         /* only set the last rebind timestamp when we did rebind after a
883          * non-read LDAP operation. That way we avoid the replication sleep
884          * after a simple redirected search operation - Guenther */
885
886         switch (request) {
887
888                 case LDAP_REQ_MODIFY:
889                 case LDAP_REQ_ADD:
890                 case LDAP_REQ_DELETE:
891                 case LDAP_REQ_MODDN:
892                 case LDAP_REQ_EXTENDED:
893                         DEBUG(10,("rebindproc_connect_with_state: "
894                                 "setting last_rebind timestamp "
895                                 "(req: 0x%02x)\n", (unsigned int)request));
896                         GetTimeOfDay(&ldap_state->last_rebind);
897                         break;
898                 default:
899                         ZERO_STRUCT(ldap_state->last_rebind);
900                         break;
901         }
902
903         return rc;
904 }
905 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
906
907 /*******************************************************************
908  Add a rebind function for authenticated referrals
909 ******************************************************************/
910 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
911 #else
912 # if LDAP_SET_REBIND_PROC_ARGS == 2
913 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
914                        int *method, int freeit )
915 {
916         struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
917
918         return rebindproc_with_state(ldap_struct, whop, credp,
919                                      method, freeit, ldap_state);
920         
921 }
922 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
923 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
924
925 /*******************************************************************
926  a rebind function for authenticated referrals
927  this also does the connection, but no void*.
928 ******************************************************************/
929 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
930 # if LDAP_SET_REBIND_PROC_ARGS == 2
931 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
932                                ber_int_t msgid)
933 {
934         struct smbldap_state *ldap_state = smbldap_find_state(ld);
935
936         return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid, 
937                                              ldap_state);
938 }
939 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
940 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
941
942 /*******************************************************************
943  connect to the ldap server under system privilege.
944 ******************************************************************/
945 static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_struct)
946 {
947         int rc;
948         int version;
949
950         if (!ldap_state->anonymous && !ldap_state->bind_dn) {
951
952                 /* get the default dn and password only if they are not set already */
953                 if (!fetch_ldap_pw(&ldap_state->bind_dn, &ldap_state->bind_secret)) {
954                         DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
955                         return LDAP_INVALID_CREDENTIALS;
956                 }
957         }
958
959         /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite 
960            (OpenLDAP) doesnt' seem to support it */
961            
962         DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
963                   ldap_state->uri, ldap_state->bind_dn));
964
965 #ifdef HAVE_LDAP_SET_REBIND_PROC
966 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
967 # if LDAP_SET_REBIND_PROC_ARGS == 2     
968         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect); 
969 # endif
970 # if LDAP_SET_REBIND_PROC_ARGS == 3     
971         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);  
972 # endif
973 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
974 # if LDAP_SET_REBIND_PROC_ARGS == 2     
975         ldap_set_rebind_proc(ldap_struct, &rebindproc); 
976 # endif
977 # if LDAP_SET_REBIND_PROC_ARGS == 3     
978         ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);  
979 # endif
980 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
981 #endif
982
983         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
984
985         if (rc != LDAP_SUCCESS) {
986                 char *ld_error = NULL;
987                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
988                                 &ld_error);
989                 DEBUG(ldap_state->num_failures ? 2 : 0,
990                       ("failed to bind to server %s with dn=\"%s\" Error: %s\n\t%s\n",
991                                ldap_state->uri,
992                                ldap_state->bind_dn ? ldap_state->bind_dn : "[Anonymous bind]",
993                                ldap_err2string(rc),
994                                ld_error ? ld_error : "(unknown)"));
995                 SAFE_FREE(ld_error);
996                 ldap_state->num_failures++;
997                 return rc;
998         }
999
1000         ldap_state->num_failures = 0;
1001         ldap_state->paged_results = False;
1002
1003         ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
1004
1005         if (smbldap_has_control(ldap_state->ldap_struct, ADS_PAGE_CTL_OID) && version == 3) {
1006                 ldap_state->paged_results = True;
1007         }
1008
1009         DEBUG(3, ("ldap_connect_system: successful connection to the LDAP server\n"));
1010         DEBUGADD(10, ("ldap_connect_system: LDAP server %s support paged results\n", 
1011                 ldap_state->paged_results ? "does" : "does not"));
1012         return rc;
1013 }
1014
1015 static void smbldap_idle_fn(struct event_context *event_ctx,
1016                             struct timed_event *te,
1017                             const struct timeval *now,
1018                             void *private_data);
1019
1020 /**********************************************************************
1021  Connect to LDAP server (called before every ldap operation)
1022 *********************************************************************/
1023 static int smbldap_open(struct smbldap_state *ldap_state)
1024 {
1025         int rc, opt_rc;
1026         bool reopen = False;
1027         SMB_ASSERT(ldap_state);
1028                 
1029 #ifndef NO_LDAP_SECURITY
1030         if (geteuid() != 0) {
1031                 DEBUG(0, ("smbldap_open: cannot access LDAP when not root..\n"));
1032                 return  LDAP_INSUFFICIENT_ACCESS;
1033         }
1034 #endif
1035
1036         if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time(NULL))) {
1037
1038 #ifdef HAVE_UNIXSOCKET
1039                 struct sockaddr_un addr;
1040 #else
1041                 struct sockaddr addr;
1042 #endif
1043                 socklen_t len = sizeof(addr);
1044                 int sd;
1045
1046                 opt_rc = ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd);
1047                 if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 )
1048                         reopen = True;
1049
1050 #ifdef HAVE_UNIXSOCKET
1051                 if (opt_rc == 0 && addr.sun_family == AF_UNIX)
1052                         reopen = True;
1053 #endif
1054                 if (reopen) {
1055                         /* the other end has died. reopen. */
1056                         ldap_unbind(ldap_state->ldap_struct);
1057                         ldap_state->ldap_struct = NULL;
1058                         ldap_state->last_ping = (time_t)0;
1059                 } else {
1060                         ldap_state->last_ping = time(NULL);
1061                 } 
1062         }
1063
1064         if (ldap_state->ldap_struct != NULL) {
1065                 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
1066                 return LDAP_SUCCESS;
1067         }
1068
1069         if ((rc = smbldap_open_connection(ldap_state))) {
1070                 return rc;
1071         }
1072
1073         if ((rc = smbldap_connect_system(ldap_state, ldap_state->ldap_struct))) {
1074                 ldap_unbind(ldap_state->ldap_struct);
1075                 ldap_state->ldap_struct = NULL;
1076                 return rc;
1077         }
1078
1079
1080         ldap_state->last_ping = time(NULL);
1081         ldap_state->pid = sys_getpid();
1082
1083         TALLOC_FREE(ldap_state->idle_event);
1084
1085         if (ldap_state->event_context != NULL) {
1086                 ldap_state->idle_event = event_add_timed(
1087                         ldap_state->event_context, NULL,
1088                         timeval_current_ofs(SMBLDAP_IDLE_TIME, 0),
1089                         "smbldap_idle_fn", smbldap_idle_fn, ldap_state);
1090         }
1091
1092         DEBUG(4,("The LDAP server is successfully connected\n"));
1093
1094         return LDAP_SUCCESS;
1095 }
1096
1097 /**********************************************************************
1098 Disconnect from LDAP server 
1099 *********************************************************************/
1100 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
1101 {
1102         if (!ldap_state)
1103                 return NT_STATUS_INVALID_PARAMETER;
1104                 
1105         if (ldap_state->ldap_struct != NULL) {
1106                 ldap_unbind(ldap_state->ldap_struct);
1107                 ldap_state->ldap_struct = NULL;
1108         }
1109
1110         smbldap_delete_state(ldap_state);
1111         
1112         DEBUG(5,("The connection to the LDAP server was closed\n"));
1113         /* maybe free the results here --metze */
1114         
1115         return NT_STATUS_OK;
1116 }
1117
1118 static bool got_alarm;
1119
1120 static void (*old_handler)(int);
1121
1122 static void gotalarm_sig(int dummy)
1123 {
1124         got_alarm = True;
1125 }
1126
1127 static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
1128                             int *attempts, time_t endtime)
1129 {
1130         time_t now = time(NULL);
1131         int open_rc = LDAP_SERVER_DOWN;
1132
1133         if (*rc != LDAP_SERVER_DOWN)
1134                 goto no_next;
1135
1136         if (now >= endtime) {
1137                 smbldap_close(ldap_state);
1138                 *rc = LDAP_TIMEOUT;
1139                 goto no_next;
1140         }
1141
1142         if (*attempts == 0) {
1143                 got_alarm = False;
1144                 old_handler = CatchSignal(SIGALRM, gotalarm_sig);
1145                 alarm(endtime - now);
1146
1147                 if (ldap_state->pid != sys_getpid())
1148                         smbldap_close(ldap_state);
1149         }
1150
1151         while (1) {
1152
1153                 if (*attempts != 0)
1154                         smb_msleep(1000);
1155
1156                 *attempts += 1;
1157
1158                 open_rc = smbldap_open(ldap_state);
1159
1160                 if (open_rc == LDAP_SUCCESS) {
1161                         ldap_state->last_use = now;
1162                         return True;
1163                 }
1164
1165                 if (open_rc == LDAP_INSUFFICIENT_ACCESS) {
1166                         /* The fact that we are non-root or any other
1167                          * access-denied condition will not change in the next
1168                          * round of trying */
1169                         *rc = open_rc;
1170                         break;
1171                 }
1172
1173                 if (got_alarm) {
1174                         *rc = LDAP_TIMEOUT;
1175                         break;
1176                 }
1177
1178                 if (open_rc != LDAP_SUCCESS) {
1179                         DEBUG(1, ("Connection to LDAP server failed for the "
1180                                   "%d try!\n", *attempts));
1181                 }
1182         }
1183
1184  no_next:
1185         CatchSignal(SIGALRM, old_handler);
1186         alarm(0);
1187         ldap_state->last_use = now;
1188         return False;
1189 }
1190
1191 /*********************************************************************
1192  ********************************************************************/
1193
1194 static int smbldap_search_ext(struct smbldap_state *ldap_state,
1195                               const char *base, int scope, const char *filter, 
1196                               const char *attrs[], int attrsonly,
1197                               LDAPControl **sctrls, LDAPControl **cctrls, 
1198                               int sizelimit, LDAPMessage **res)
1199 {
1200         int             rc = LDAP_SERVER_DOWN;
1201         int             attempts = 0;
1202         char           *utf8_filter;
1203         time_t          endtime = time(NULL)+lp_ldap_timeout();
1204         struct          timeval timeout;
1205         size_t          converted_size;
1206
1207         SMB_ASSERT(ldap_state);
1208         
1209         DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], "
1210                  "scope => [%d]\n", base, filter, scope));
1211
1212         if (ldap_state->last_rebind.tv_sec > 0) {
1213                 struct timeval  tval;
1214                 SMB_BIG_INT     tdiff = 0;
1215                 int             sleep_time = 0;
1216
1217                 ZERO_STRUCT(tval);
1218                 GetTimeOfDay(&tval);
1219
1220                 tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
1221                 tdiff /= 1000; /* Convert to milliseconds. */
1222
1223                 sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
1224                 sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
1225
1226                 if (sleep_time > 0) {
1227                         /* we wait for the LDAP replication */
1228                         DEBUG(5,("smbldap_search_ext: waiting %d milliseconds "
1229                                  "for LDAP replication.\n",sleep_time));
1230                         smb_msleep(sleep_time);
1231                         DEBUG(5,("smbldap_search_ext: go on!\n"));
1232                 }
1233                 ZERO_STRUCT(ldap_state->last_rebind);
1234         }
1235
1236         if (!push_utf8_allocate(&utf8_filter, filter, &converted_size)) {
1237                 return LDAP_NO_MEMORY;
1238         }
1239
1240         /* Setup timeout for the ldap_search_ext_s call - local and remote. */
1241         timeout.tv_sec = lp_ldap_timeout();
1242         timeout.tv_usec = 0;
1243
1244         /* Setup alarm timeout.... Do we need both of these ? JRA.
1245          * Yes, I think we do need both of these. The server timeout only
1246          * covers the case where the server's operation takes too long. It
1247          * does not cover the case where the request hangs on its way to the
1248          * server. The server side timeout is not strictly necessary, it's
1249          * just a bit more kind to the server. VL. */
1250
1251         got_alarm = 0;
1252         CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
1253         alarm(lp_ldap_timeout());
1254         /* End setup timeout. */
1255
1256         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1257                 rc = ldap_search_ext_s(ldap_state->ldap_struct, base, scope, 
1258                                        utf8_filter,
1259                                        CONST_DISCARD(char **, attrs),
1260                                        attrsonly, sctrls, cctrls, &timeout,
1261                                        sizelimit, res);
1262                 if (rc != LDAP_SUCCESS) {
1263                         char *ld_error = NULL;
1264                         int ld_errno;
1265
1266                         ldap_get_option(ldap_state->ldap_struct,
1267                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1268
1269                         ldap_get_option(ldap_state->ldap_struct,
1270                                         LDAP_OPT_ERROR_STRING, &ld_error);
1271                         DEBUG(10, ("Failed search for base: %s, error: %d (%s) "
1272                                    "(%s)\n", base, ld_errno,
1273                                    ldap_err2string(rc),
1274                                    ld_error ? ld_error : "unknown"));
1275                         SAFE_FREE(ld_error);
1276
1277                         if (ld_errno == LDAP_SERVER_DOWN) {
1278                                 ldap_unbind(ldap_state->ldap_struct);
1279                                 ldap_state->ldap_struct = NULL;
1280                         }
1281                 }
1282         }
1283
1284         SAFE_FREE(utf8_filter);
1285
1286         /* Teardown timeout. */
1287         CatchSignal(SIGALRM, SIGNAL_CAST SIG_IGN);
1288         alarm(0);
1289
1290         if (got_alarm != 0)
1291                 return LDAP_TIMELIMIT_EXCEEDED;
1292
1293         return rc;
1294 }
1295
1296 int smbldap_search(struct smbldap_state *ldap_state, 
1297                    const char *base, int scope, const char *filter, 
1298                    const char *attrs[], int attrsonly, 
1299                    LDAPMessage **res)
1300 {
1301         return smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1302                                   attrsonly, NULL, NULL, LDAP_NO_LIMIT, res);
1303 }
1304
1305 int smbldap_search_paged(struct smbldap_state *ldap_state, 
1306                          const char *base, int scope, const char *filter, 
1307                          const char **attrs, int attrsonly, int pagesize,
1308                          LDAPMessage **res, void **cookie)
1309 {
1310         LDAPControl     pr;
1311         LDAPControl     **rcontrols;
1312         LDAPControl     *controls[2] = { NULL, NULL};
1313         BerElement      *cookie_be = NULL;
1314         struct berval   *cookie_bv = NULL;
1315         int             tmp = 0, i, rc;
1316         bool            critical = True;
1317
1318         *res = NULL;
1319
1320         DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s],"
1321                  "scope => [%d], pagesize => [%d]\n",
1322                  base, filter, scope, pagesize));
1323
1324         cookie_be = ber_alloc_t(LBER_USE_DER);
1325         if (cookie_be == NULL) {
1326                 DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns "
1327                          "NULL\n"));
1328                 return LDAP_NO_MEMORY;
1329         }
1330
1331         /* construct cookie */
1332         if (*cookie != NULL) {
1333                 ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie);
1334                 ber_bvfree((struct berval *)*cookie); /* don't need it from last time */
1335                 *cookie = NULL;
1336         } else {
1337                 ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0);
1338         }
1339         ber_flatten(cookie_be, &cookie_bv);
1340
1341         pr.ldctl_oid = CONST_DISCARD(char *, ADS_PAGE_CTL_OID);
1342         pr.ldctl_iscritical = (char) critical;
1343         pr.ldctl_value.bv_len = cookie_bv->bv_len;
1344         pr.ldctl_value.bv_val = cookie_bv->bv_val;
1345
1346         controls[0] = &pr;
1347         controls[1] = NULL;
1348
1349         rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs, 
1350                                  0, controls, NULL, LDAP_NO_LIMIT, res);
1351
1352         ber_free(cookie_be, 1);
1353         ber_bvfree(cookie_bv);
1354
1355         if (rc != 0) {
1356                 DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) "
1357                          "failed with [%s]\n", filter, ldap_err2string(rc)));
1358                 goto done;
1359         }
1360
1361         DEBUG(3,("smbldap_search_paged: search was successfull\n"));
1362
1363         rc = ldap_parse_result(ldap_state->ldap_struct, *res, NULL, NULL, 
1364                                NULL, NULL, &rcontrols,  0);
1365         if (rc != 0) {
1366                 DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \
1367                          "with [%s]\n", ldap_err2string(rc)));
1368                 goto done;
1369         }
1370
1371         if (rcontrols == NULL)
1372                 goto done;
1373
1374         for (i=0; rcontrols[i]; i++) {
1375
1376                 if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0)
1377                         continue;
1378
1379                 cookie_be = ber_init(&rcontrols[i]->ldctl_value);
1380                 ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv);
1381                 /* the berval is the cookie, but must be freed when it is all
1382                    done */
1383                 if (cookie_bv->bv_len)
1384                         *cookie=ber_bvdup(cookie_bv);
1385                 else
1386                         *cookie=NULL;
1387                 ber_bvfree(cookie_bv);
1388                 ber_free(cookie_be, 1);
1389                 break;
1390         }
1391         ldap_controls_free(rcontrols);
1392 done:   
1393         return rc;
1394 }
1395
1396 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1397 {
1398         int             rc = LDAP_SERVER_DOWN;
1399         int             attempts = 0;
1400         char           *utf8_dn;
1401         time_t          endtime = time(NULL)+lp_ldap_timeout();
1402         size_t          converted_size;
1403
1404         SMB_ASSERT(ldap_state);
1405
1406         DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1407
1408         if (!push_utf8_allocate(&utf8_dn, dn, &converted_size)) {
1409                 return LDAP_NO_MEMORY;
1410         }
1411
1412         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1413                 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1414                 if (rc != LDAP_SUCCESS) {
1415                         char *ld_error = NULL;
1416                         int ld_errno;
1417
1418                         ldap_get_option(ldap_state->ldap_struct,
1419                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1420
1421                         ldap_get_option(ldap_state->ldap_struct,
1422                                         LDAP_OPT_ERROR_STRING, &ld_error);
1423                         DEBUG(10, ("Failed to modify dn: %s, error: %d (%s) "
1424                                    "(%s)\n", dn, ld_errno,
1425                                    ldap_err2string(rc),
1426                                    ld_error ? ld_error : "unknown"));
1427                         SAFE_FREE(ld_error);
1428
1429                         if (ld_errno == LDAP_SERVER_DOWN) {
1430                                 ldap_unbind(ldap_state->ldap_struct);
1431                                 ldap_state->ldap_struct = NULL;
1432                         }
1433                 }
1434         }
1435                 
1436         SAFE_FREE(utf8_dn);
1437         return rc;
1438 }
1439
1440 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1441 {
1442         int             rc = LDAP_SERVER_DOWN;
1443         int             attempts = 0;
1444         char           *utf8_dn;
1445         time_t          endtime = time(NULL)+lp_ldap_timeout();
1446         size_t          converted_size;
1447         
1448         SMB_ASSERT(ldap_state);
1449
1450         DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1451
1452         if (!push_utf8_allocate(&utf8_dn, dn, &converted_size)) {
1453                 return LDAP_NO_MEMORY;
1454         }
1455
1456         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1457                 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1458                 if (rc != LDAP_SUCCESS) {
1459                         char *ld_error = NULL;
1460                         int ld_errno;
1461
1462                         ldap_get_option(ldap_state->ldap_struct,
1463                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1464
1465                         ldap_get_option(ldap_state->ldap_struct,
1466                                         LDAP_OPT_ERROR_STRING, &ld_error);
1467                         DEBUG(10, ("Failed to add dn: %s, error: %d (%s) "
1468                                    "(%s)\n", dn, ld_errno,
1469                                    ldap_err2string(rc),
1470                                    ld_error ? ld_error : "unknown"));
1471                         SAFE_FREE(ld_error);
1472
1473                         if (ld_errno == LDAP_SERVER_DOWN) {
1474                                 ldap_unbind(ldap_state->ldap_struct);
1475                                 ldap_state->ldap_struct = NULL;
1476                         }
1477                 }
1478         }
1479         
1480         SAFE_FREE(utf8_dn);
1481         return rc;
1482 }
1483
1484 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1485 {
1486         int             rc = LDAP_SERVER_DOWN;
1487         int             attempts = 0;
1488         char           *utf8_dn;
1489         time_t          endtime = time(NULL)+lp_ldap_timeout();
1490         size_t          converted_size;
1491         
1492         SMB_ASSERT(ldap_state);
1493
1494         DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1495
1496         if (!push_utf8_allocate(&utf8_dn, dn, &converted_size)) {
1497                 return LDAP_NO_MEMORY;
1498         }
1499
1500         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1501                 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1502                 if (rc != LDAP_SUCCESS) {
1503                         char *ld_error = NULL;
1504                         int ld_errno;
1505
1506                         ldap_get_option(ldap_state->ldap_struct,
1507                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1508
1509                         ldap_get_option(ldap_state->ldap_struct,
1510                                         LDAP_OPT_ERROR_STRING, &ld_error);
1511                         DEBUG(10, ("Failed to delete dn: %s, error: %d (%s) "
1512                                    "(%s)\n", dn, ld_errno,
1513                                    ldap_err2string(rc),
1514                                    ld_error ? ld_error : "unknown"));
1515                         SAFE_FREE(ld_error);
1516
1517                         if (ld_errno == LDAP_SERVER_DOWN) {
1518                                 ldap_unbind(ldap_state->ldap_struct);
1519                                 ldap_state->ldap_struct = NULL;
1520                         }
1521                 }
1522         }
1523         
1524         SAFE_FREE(utf8_dn);
1525         return rc;
1526 }
1527
1528 int smbldap_extended_operation(struct smbldap_state *ldap_state, 
1529                                LDAP_CONST char *reqoid, struct berval *reqdata, 
1530                                LDAPControl **serverctrls, LDAPControl **clientctrls, 
1531                                char **retoidp, struct berval **retdatap)
1532 {
1533         int             rc = LDAP_SERVER_DOWN;
1534         int             attempts = 0;
1535         time_t          endtime = time(NULL)+lp_ldap_timeout();
1536         
1537         if (!ldap_state)
1538                 return (-1);
1539
1540         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1541                 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
1542                                                reqdata, serverctrls,
1543                                                clientctrls, retoidp, retdatap);
1544                 if (rc != LDAP_SUCCESS) {
1545                         char *ld_error = NULL;
1546                         int ld_errno;
1547
1548                         ldap_get_option(ldap_state->ldap_struct,
1549                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1550
1551                         ldap_get_option(ldap_state->ldap_struct,
1552                                         LDAP_OPT_ERROR_STRING, &ld_error);
1553                         DEBUG(10, ("Extended operation failed with error: "
1554                                    "%d (%s) (%s)\n", ld_errno,
1555                                    ldap_err2string(rc),
1556                                    ld_error ? ld_error : "unknown"));
1557                         SAFE_FREE(ld_error);
1558
1559                         if (ld_errno == LDAP_SERVER_DOWN) {
1560                                 ldap_unbind(ldap_state->ldap_struct);
1561                                 ldap_state->ldap_struct = NULL;
1562                         }
1563                 }
1564         }
1565                 
1566         return rc;
1567 }
1568
1569 /*******************************************************************
1570  run the search by name.
1571 ******************************************************************/
1572 int smbldap_search_suffix (struct smbldap_state *ldap_state,
1573                            const char *filter, const char **search_attr,
1574                            LDAPMessage ** result)
1575 {
1576         return smbldap_search(ldap_state, lp_ldap_suffix(), LDAP_SCOPE_SUBTREE,
1577                               filter, search_attr, 0, result);
1578 }
1579
1580 static void smbldap_idle_fn(struct event_context *event_ctx,
1581                             struct timed_event *te,
1582                             const struct timeval *now,
1583                             void *private_data)
1584 {
1585         struct smbldap_state *state = (struct smbldap_state *)private_data;
1586
1587         TALLOC_FREE(state->idle_event);
1588
1589         if (state->ldap_struct == NULL) {
1590                 DEBUG(10,("ldap connection not connected...\n"));
1591                 return;
1592         }
1593                 
1594         if ((state->last_use+SMBLDAP_IDLE_TIME) > now->tv_sec) {
1595                 DEBUG(10,("ldap connection not idle...\n"));
1596
1597                 state->idle_event = event_add_timed(
1598                         event_ctx, NULL,
1599                         timeval_add(now, SMBLDAP_IDLE_TIME, 0),
1600                         "smbldap_idle_fn", smbldap_idle_fn,
1601                         private_data);
1602                 return;
1603         }
1604                 
1605         DEBUG(7,("ldap connection idle...closing connection\n"));
1606         smbldap_close(state);
1607 }
1608
1609 /**********************************************************************
1610  Housekeeping
1611  *********************************************************************/
1612
1613 void smbldap_free_struct(struct smbldap_state **ldap_state) 
1614 {
1615         smbldap_close(*ldap_state);
1616         
1617         if ((*ldap_state)->bind_secret) {
1618                 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1619         }
1620
1621         SAFE_FREE((*ldap_state)->bind_dn);
1622         SAFE_FREE((*ldap_state)->bind_secret);
1623
1624         TALLOC_FREE((*ldap_state)->idle_event);
1625
1626         *ldap_state = NULL;
1627
1628         /* No need to free any further, as it is talloc()ed */
1629 }
1630
1631
1632 /**********************************************************************
1633  Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1634  *********************************************************************/
1635
1636 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, struct event_context *event_ctx,
1637                       const char *location,
1638                       struct smbldap_state **smbldap_state)
1639 {
1640         *smbldap_state = TALLOC_ZERO_P(mem_ctx, struct smbldap_state);
1641         if (!*smbldap_state) {
1642                 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1643                 return NT_STATUS_NO_MEMORY;
1644         }
1645
1646         if (location) {
1647                 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1648         } else {
1649                 (*smbldap_state)->uri = "ldap://localhost";
1650         }
1651
1652         (*smbldap_state)->event_context = event_ctx;
1653
1654         return NT_STATUS_OK;
1655 }
1656
1657 /*******************************************************************
1658  Return a copy of the DN for a LDAPMessage. Convert from utf8 to CH_UNIX.
1659 ********************************************************************/
1660 char *smbldap_get_dn(LDAP *ld, LDAPMessage *entry)
1661 {
1662         char *utf8_dn, *unix_dn;
1663         size_t converted_size;
1664
1665         utf8_dn = ldap_get_dn(ld, entry);
1666         if (!utf8_dn) {
1667                 DEBUG (5, ("smbldap_get_dn: ldap_get_dn failed\n"));
1668                 return NULL;
1669         }
1670         if (!pull_utf8_allocate(&unix_dn, utf8_dn, &converted_size)) {
1671                 DEBUG (0, ("smbldap_get_dn: String conversion failure utf8 "
1672                            "[%s]\n", utf8_dn));
1673                 return NULL;
1674         }
1675         ldap_memfree(utf8_dn);
1676         return unix_dn;
1677 }
1678
1679  const char *smbldap_talloc_dn(TALLOC_CTX *mem_ctx, LDAP *ld,
1680                                LDAPMessage *entry)
1681 {
1682         char *utf8_dn, *unix_dn;
1683         size_t converted_size;
1684
1685         utf8_dn = ldap_get_dn(ld, entry);
1686         if (!utf8_dn) {
1687                 DEBUG (5, ("smbldap_get_dn: ldap_get_dn failed\n"));
1688                 return NULL;
1689         }
1690         if (!pull_utf8_talloc(mem_ctx, &unix_dn, utf8_dn, &converted_size)) {
1691                 DEBUG (0, ("smbldap_get_dn: String conversion failure utf8 "
1692                            "[%s]\n", utf8_dn));
1693                 return NULL;
1694         }
1695         ldap_memfree(utf8_dn);
1696         return unix_dn;
1697 }
1698
1699 /*******************************************************************
1700  Check if root-dse has a certain Control or Extension
1701 ********************************************************************/
1702
1703 static bool smbldap_check_root_dse(LDAP *ld, const char **attrs, const char *value) 
1704 {
1705         LDAPMessage *msg = NULL;
1706         LDAPMessage *entry = NULL;
1707         char **values = NULL;
1708         int rc, num_result, num_values, i;
1709         bool result = False;
1710
1711         if (!attrs[0]) {
1712                 DEBUG(3,("smbldap_check_root_dse: nothing to look for\n"));
1713                 return False;
1714         }
1715
1716         if (!strequal(attrs[0], "supportedExtension") && 
1717             !strequal(attrs[0], "supportedControl") && 
1718             !strequal(attrs[0], "namingContexts")) {
1719                 DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0]));
1720                 return False;
1721         }
1722
1723         rc = ldap_search_s(ld, "", LDAP_SCOPE_BASE, 
1724                            "(objectclass=*)", CONST_DISCARD(char **, attrs), 0 , &msg);
1725
1726         if (rc != LDAP_SUCCESS) {
1727                 DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n"));
1728                 return False;
1729         }
1730
1731         num_result = ldap_count_entries(ld, msg);
1732
1733         if (num_result != 1) {
1734                 DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result));
1735                 goto done;
1736         }
1737
1738         entry = ldap_first_entry(ld, msg);
1739
1740         if (entry == NULL) {
1741                 DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n"));
1742                 goto done;
1743         }
1744
1745         values = ldap_get_values(ld, entry, attrs[0]);
1746
1747         if (values == NULL) {
1748                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0]));
1749                 goto done;
1750         }
1751
1752         num_values = ldap_count_values(values);
1753
1754         if (num_values == 0) {
1755                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0]));
1756                 goto done;
1757         }
1758
1759         for (i=0; i<num_values; i++) {
1760                 if (strcmp(values[i], value) == 0)
1761                         result = True;
1762         }
1763
1764
1765  done:
1766         if (values != NULL)
1767                 ldap_value_free(values);
1768         if (msg != NULL)
1769                 ldap_msgfree(msg);
1770
1771         return result;
1772
1773 }
1774
1775 /*******************************************************************
1776  Check if LDAP-Server supports a certain Control (OID in string format)
1777 ********************************************************************/
1778
1779 bool smbldap_has_control(LDAP *ld, const char *control)
1780 {
1781         const char *attrs[] = { "supportedControl", NULL };
1782         return smbldap_check_root_dse(ld, attrs, control);
1783 }
1784
1785 /*******************************************************************
1786  Check if LDAP-Server supports a certain Extension (OID in string format)
1787 ********************************************************************/
1788
1789 bool smbldap_has_extension(LDAP *ld, const char *extension)
1790 {
1791         const char *attrs[] = { "supportedExtension", NULL };
1792         return smbldap_check_root_dse(ld, attrs, extension);
1793 }
1794
1795 /*******************************************************************
1796  Check if LDAP-Server holds a given namingContext
1797 ********************************************************************/
1798
1799 bool smbldap_has_naming_context(LDAP *ld, const char *naming_context)
1800 {
1801         const char *attrs[] = { "namingContexts", NULL };
1802         return smbldap_check_root_dse(ld, attrs, naming_context);
1803 }
1804
1805 bool smbldap_set_creds(struct smbldap_state *ldap_state, bool anon, const char *dn, const char *secret)
1806 {
1807         ldap_state->anonymous = anon;
1808
1809         /* free any previously set credential */
1810
1811         SAFE_FREE(ldap_state->bind_dn);
1812         if (ldap_state->bind_secret) {
1813                 /* make sure secrets are zeroed out of memory */
1814                 memset(ldap_state->bind_secret, '\0', strlen(ldap_state->bind_secret));
1815                 SAFE_FREE(ldap_state->bind_secret);
1816         }
1817
1818         if ( ! anon) {
1819                 ldap_state->bind_dn = SMB_STRDUP(dn);
1820                 ldap_state->bind_secret = SMB_STRDUP(secret);
1821         }
1822
1823         return True;
1824 }