Fix bug 6157
[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  char * smbldap_talloc_smallest_attribute(LDAP *ldap_struct, LDAPMessage *entry,
337                                           const char *attribute,
338                                           TALLOC_CTX *mem_ctx)
339 {
340         char **values;
341         char *result;
342         size_t converted_size;
343         int i, num_values;
344
345         if (attribute == NULL) {
346                 return NULL;
347         }
348
349         values = ldap_get_values(ldap_struct, entry, attribute);
350
351         if (values == NULL) {
352                 DEBUG(10, ("attribute %s does not exist\n", attribute));
353                 return NULL;
354         }
355
356         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
357                 DEBUG(10, ("pull_utf8_talloc failed\n"));
358                 ldap_value_free(values);
359                 return NULL;
360         }
361
362         num_values = ldap_count_values(values);
363
364         for (i=1; i<num_values; i++) {
365                 char *tmp;
366
367                 if (!pull_utf8_talloc(mem_ctx, &tmp, values[i],
368                                       &converted_size)) {
369                         DEBUG(10, ("pull_utf8_talloc failed\n"));
370                         TALLOC_FREE(result);
371                         ldap_value_free(values);
372                         return NULL;
373                 }
374
375                 if (StrCaseCmp(tmp, result) < 0) {
376                         TALLOC_FREE(result);
377                         result = tmp;
378                 } else {
379                         TALLOC_FREE(tmp);
380                 }
381         }
382
383         ldap_value_free(values);
384
385 #ifdef DEBUG_PASSWORDS
386         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
387                      attribute, result));
388 #endif
389         return result;
390 }
391
392  static int ldapmsg_destructor(LDAPMessage **result) {
393         ldap_msgfree(*result);
394         return 0;
395 }
396
397  void talloc_autofree_ldapmsg(TALLOC_CTX *mem_ctx, LDAPMessage *result)
398 {
399         LDAPMessage **handle;
400
401         if (result == NULL) {
402                 return;
403         }
404
405         handle = TALLOC_P(mem_ctx, LDAPMessage *);
406         SMB_ASSERT(handle != NULL);
407
408         *handle = result;
409         talloc_set_destructor(handle, ldapmsg_destructor);
410 }
411
412  static int ldapmod_destructor(LDAPMod ***mod) {
413         ldap_mods_free(*mod, True);
414         return 0;
415 }
416
417  void talloc_autofree_ldapmod(TALLOC_CTX *mem_ctx, LDAPMod **mod)
418 {
419         LDAPMod ***handle;
420
421         if (mod == NULL) {
422                 return;
423         }
424
425         handle = TALLOC_P(mem_ctx, LDAPMod **);
426         SMB_ASSERT(handle != NULL);
427
428         *handle = mod;
429         talloc_set_destructor(handle, ldapmod_destructor);
430 }
431
432 /************************************************************************
433  Routine to manage the LDAPMod structure array
434  manage memory used by the array, by each struct, and values
435  ***********************************************************************/
436
437  void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
438 {
439         LDAPMod **mods;
440         int i;
441         int j;
442
443         mods = *modlist;
444
445         /* sanity checks on the mod values */
446
447         if (attribute == NULL || *attribute == '\0') {
448                 return; 
449         }
450
451 #if 0   /* commented out after discussion with abartlet.  Do not reenable.
452            left here so other do not re-add similar code   --jerry */
453         if (value == NULL || *value == '\0')
454                 return;
455 #endif
456
457         if (mods == NULL) {
458                 mods = SMB_MALLOC_P(LDAPMod *);
459                 if (mods == NULL) {
460                         smb_panic("smbldap_set_mod: out of memory!");
461                         /* notreached. */
462                 }
463                 mods[0] = NULL;
464         }
465
466         for (i = 0; mods[i] != NULL; ++i) {
467                 if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
468                         break;
469         }
470
471         if (mods[i] == NULL) {
472                 mods = SMB_REALLOC_ARRAY (mods, LDAPMod *, i + 2);
473                 if (mods == NULL) {
474                         smb_panic("smbldap_set_mod: out of memory!");
475                         /* notreached. */
476                 }
477                 mods[i] = SMB_MALLOC_P(LDAPMod);
478                 if (mods[i] == NULL) {
479                         smb_panic("smbldap_set_mod: out of memory!");
480                         /* notreached. */
481                 }
482                 mods[i]->mod_op = modop;
483                 mods[i]->mod_values = NULL;
484                 mods[i]->mod_type = SMB_STRDUP(attribute);
485                 mods[i + 1] = NULL;
486         }
487
488         if (value != NULL) {
489                 char *utf8_value = NULL;
490                 size_t converted_size;
491
492                 j = 0;
493                 if (mods[i]->mod_values != NULL) {
494                         for (; mods[i]->mod_values[j] != NULL; j++);
495                 }
496                 mods[i]->mod_values = SMB_REALLOC_ARRAY(mods[i]->mod_values, char *, j + 2);
497                                                
498                 if (mods[i]->mod_values == NULL) {
499                         smb_panic("smbldap_set_mod: out of memory!");
500                         /* notreached. */
501                 }
502
503                 if (!push_utf8_talloc(talloc_tos(), &utf8_value, value, &converted_size)) {
504                         smb_panic("smbldap_set_mod: String conversion failure!");
505                         /* notreached. */
506                 }
507                 
508                 
509                 mods[i]->mod_values[j] = SMB_STRDUP(utf8_value);
510                 TALLOC_FREE(utf8_value);
511                 SMB_ASSERT(mods[i]->mod_values[j] != NULL);
512
513                 mods[i]->mod_values[j + 1] = NULL;
514         }
515         *modlist = mods;
516 }
517
518 /**********************************************************************
519   Set attribute to newval in LDAP, regardless of what value the
520   attribute had in LDAP before.
521 *********************************************************************/
522
523  void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
524                       LDAPMod ***mods,
525                       const char *attribute, const char *newval)
526 {
527         char oldval[2048]; /* current largest allowed value is mungeddial */
528         bool existed;
529
530         if (attribute == NULL) {
531                 /* This can actually happen for ldapsam_compat where we for
532                  * example don't have a password history */
533                 return;
534         }
535
536         if (existing != NULL) {
537                 existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
538         } else {
539                 existed = False;
540                 *oldval = '\0';
541         }
542
543         /* all of our string attributes are case insensitive */
544         
545         if (existed && newval && (StrCaseCmp(oldval, newval) == 0)) {
546                 
547                 /* Believe it or not, but LDAP will deny a delete and
548                    an add at the same time if the values are the
549                    same... */
550                 DEBUG(10,("smbldap_make_mod: attribute |%s| not changed.\n", attribute));
551                 return;
552         }
553
554         if (existed) {
555                 /* There has been no value before, so don't delete it.
556                  * Here's a possible race: We might end up with
557                  * duplicate attributes */
558                 /* By deleting exactly the value we found in the entry this
559                  * should be race-free in the sense that the LDAP-Server will
560                  * deny the complete operation if somebody changed the
561                  * attribute behind our back. */
562                 /* This will also allow modifying single valued attributes 
563                  * in Novell NDS. In NDS you have to first remove attribute and then
564                  * you could add new value */
565                 
566                 DEBUG(10,("smbldap_make_mod: deleting attribute |%s| values |%s|\n", attribute, oldval));
567                 smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
568         }
569
570         /* Regardless of the real operation (add or modify)
571            we add the new value here. We rely on deleting
572            the old value, should it exist. */
573
574         if ((newval != NULL) && (strlen(newval) > 0)) {
575                 DEBUG(10,("smbldap_make_mod: adding attribute |%s| value |%s|\n", attribute, newval));
576                 smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
577         }
578 }
579
580 /**********************************************************************
581  Some varients of the LDAP rebind code do not pass in the third 'arg' 
582  pointer to a void*, so we try and work around it by assuming that the 
583  value of the 'LDAP *' pointer is the same as the one we had passed in
584  **********************************************************************/
585
586 struct smbldap_state_lookup {
587         LDAP *ld;
588         struct smbldap_state *smbldap_state;
589         struct smbldap_state_lookup *prev, *next;
590 };
591
592 static struct smbldap_state_lookup *smbldap_state_lookup_list;
593
594 static struct smbldap_state *smbldap_find_state(LDAP *ld) 
595 {
596         struct smbldap_state_lookup *t;
597
598         for (t = smbldap_state_lookup_list; t; t = t->next) {
599                 if (t->ld == ld) {
600                         return t->smbldap_state;
601                 }
602         }
603         return NULL;
604 }
605
606 static void smbldap_delete_state(struct smbldap_state *smbldap_state) 
607 {
608         struct smbldap_state_lookup *t;
609
610         for (t = smbldap_state_lookup_list; t; t = t->next) {
611                 if (t->smbldap_state == smbldap_state) {
612                         DLIST_REMOVE(smbldap_state_lookup_list, t);
613                         SAFE_FREE(t);
614                         return;
615                 }
616         }
617 }
618
619 static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state) 
620 {
621         struct smbldap_state *tmp_ldap_state;
622         struct smbldap_state_lookup *t;
623         
624         if ((tmp_ldap_state = smbldap_find_state(ld))) {
625                 SMB_ASSERT(tmp_ldap_state == smbldap_state);
626                 return;
627         }
628
629         t = SMB_XMALLOC_P(struct smbldap_state_lookup);
630         ZERO_STRUCTP(t);
631         
632         DLIST_ADD_END(smbldap_state_lookup_list, t, struct smbldap_state_lookup *);
633         t->ld = ld;
634         t->smbldap_state = smbldap_state;
635 }
636
637 /********************************************************************
638  start TLS on an existing LDAP connection
639 *******************************************************************/
640
641 int smb_ldap_start_tls(LDAP *ldap_struct, int version)
642
643 #ifdef LDAP_OPT_X_TLS
644         int rc;
645 #endif
646         
647         if (lp_ldap_ssl() != LDAP_SSL_START_TLS) {
648                 return LDAP_SUCCESS;
649         }
650         
651 #ifdef LDAP_OPT_X_TLS
652         if (version != LDAP_VERSION3) {
653                 DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
654                 return LDAP_OPERATIONS_ERROR;
655         }
656
657         if ((rc = ldap_start_tls_s (ldap_struct, NULL, NULL)) != LDAP_SUCCESS)  {
658                 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
659                          ldap_err2string(rc)));
660                 return rc;
661         }
662
663         DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
664         return LDAP_SUCCESS;
665 #else
666         DEBUG(0,("StartTLS not supported by LDAP client libraries!\n"));
667         return LDAP_OPERATIONS_ERROR;
668 #endif
669 }
670
671 /********************************************************************
672  setup a connection to the LDAP server based on a uri
673 *******************************************************************/
674
675 int smb_ldap_setup_conn(LDAP **ldap_struct, const char *uri)
676 {
677         int rc;
678
679         DEBUG(10, ("smb_ldap_setup_connection: %s\n", uri));
680         
681 #ifdef HAVE_LDAP_INITIALIZE
682         
683         rc = ldap_initialize(ldap_struct, uri);
684         if (rc) {
685                 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
686         }
687
688         return rc;
689 #else 
690
691         /* Parse the string manually */
692
693         {
694                 int port = 0;
695                 fstring protocol;
696                 fstring host;
697                 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
698
699
700                 /* skip leading "URL:" (if any) */
701                 if ( strnequal( uri, "URL:", 4 ) ) {
702                         uri += 4;
703                 }
704                 
705                 sscanf(uri, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
706                 
707                 if (port == 0) {
708                         if (strequal(protocol, "ldap")) {
709                                 port = LDAP_PORT;
710                         } else if (strequal(protocol, "ldaps")) {
711                                 port = LDAPS_PORT;
712                         } else {
713                                 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
714                         }
715                 }
716                 
717                 if ((*ldap_struct = ldap_init(host, port)) == NULL)     {
718                         DEBUG(0, ("ldap_init failed !\n"));
719                         return LDAP_OPERATIONS_ERROR;
720                 }
721                 
722                 if (strequal(protocol, "ldaps")) {
723 #ifdef LDAP_OPT_X_TLS
724                         int tls = LDAP_OPT_X_TLS_HARD;
725                         if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
726                         {
727                                 DEBUG(0, ("Failed to setup a TLS session\n"));
728                         }
729                         
730                         DEBUG(3,("LDAPS option set...!\n"));
731 #else
732                         DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
733                         return LDAP_OPERATIONS_ERROR;
734 #endif /* LDAP_OPT_X_TLS */
735                 }
736         }
737 #endif /* HAVE_LDAP_INITIALIZE */
738
739
740         /* now set connection timeout */
741 #ifdef LDAP_X_OPT_CONNECT_TIMEOUT /* Netscape */
742         {
743                 int ct = lp_ldap_connection_timeout()*1000;
744                 rc = ldap_set_option(*ldap_struct, LDAP_X_OPT_CONNECT_TIMEOUT, &ct);
745                 if (rc != LDAP_SUCCESS) {
746                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
747                                 ct, ldap_err2string(rc)));
748                 }
749         }
750 #elif defined (LDAP_OPT_NETWORK_TIMEOUT) /* OpenLDAP */
751         {
752                 struct timeval ct;
753                 ct.tv_usec = 0;
754                 ct.tv_sec = lp_ldap_connection_timeout();
755                 rc = ldap_set_option(*ldap_struct, LDAP_OPT_NETWORK_TIMEOUT, &ct);
756                 if (rc != LDAP_SUCCESS) {
757                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
758                                 (int)ct.tv_sec, ldap_err2string(rc)));
759                 }
760         }
761 #endif
762
763         return LDAP_SUCCESS;
764 }
765
766 /********************************************************************
767  try to upgrade to Version 3 LDAP if not already, in either case return current
768  version 
769  *******************************************************************/
770
771 int smb_ldap_upgrade_conn(LDAP *ldap_struct, int *new_version) 
772 {
773         int version;
774         int rc;
775         
776         /* assume the worst */
777         *new_version = LDAP_VERSION2;
778
779         rc = ldap_get_option(ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
780         if (rc) {
781                 return rc;
782         }
783
784         if (version == LDAP_VERSION3) {
785                 *new_version = LDAP_VERSION3;
786                 return LDAP_SUCCESS;
787         }
788
789         /* try upgrade */
790         version = LDAP_VERSION3;
791         rc = ldap_set_option (ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
792         if (rc) {
793                 return rc;
794         }
795                 
796         *new_version = LDAP_VERSION3;
797         return LDAP_SUCCESS;
798 }
799
800 /*******************************************************************
801  open a connection to the ldap server (just until the bind)
802  ******************************************************************/
803
804 int smb_ldap_setup_full_conn(LDAP **ldap_struct, const char *uri)
805 {
806         int rc, version;
807
808         rc = smb_ldap_setup_conn(ldap_struct, uri);
809         if (rc) {
810                 return rc;
811         }
812
813         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
814         if (rc) {
815                 return rc;
816         }
817
818         rc = smb_ldap_start_tls(*ldap_struct, version);
819         if (rc) {
820                 return rc;
821         }
822
823         return LDAP_SUCCESS;
824 }
825
826 /*******************************************************************
827  open a connection to the ldap server.
828 ******************************************************************/
829 static int smbldap_open_connection (struct smbldap_state *ldap_state)
830
831 {
832         int rc = LDAP_SUCCESS;
833         int version;
834         LDAP **ldap_struct = &ldap_state->ldap_struct;
835
836         rc = smb_ldap_setup_conn(ldap_struct, ldap_state->uri);
837         if (rc) {
838                 return rc;
839         }
840
841         /* Store the LDAP pointer in a lookup list */
842
843         smbldap_store_state(*ldap_struct, ldap_state);
844
845         /* Upgrade to LDAPv3 if possible */
846
847         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
848         if (rc) {
849                 return rc;
850         }
851
852         /* Start TLS if required */
853
854         rc = smb_ldap_start_tls(*ldap_struct, version);
855         if (rc) {
856                 return rc;
857         }
858         
859         DEBUG(2, ("smbldap_open_connection: connection opened\n"));
860         return rc;
861 }
862
863 /*******************************************************************
864  a rebind function for authenticated referrals
865  This version takes a void* that we can shove useful stuff in :-)
866 ******************************************************************/
867 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
868 #else
869 static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp, 
870                                    int *methodp, int freeit, void *arg)
871 {
872         struct smbldap_state *ldap_state = arg;
873         
874         /** @TODO Should we be doing something to check what servers we rebind to?
875             Could we get a referral to a machine that we don't want to give our
876             username and password to? */
877         
878         if (freeit) {
879                 SAFE_FREE(*whop);
880                 if (*credp) {
881                         memset(*credp, '\0', strlen(*credp));
882                 }
883                 SAFE_FREE(*credp);
884         } else {
885                 DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n", 
886                           ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
887
888                 if (ldap_state->anonymous) {
889                         *whop = NULL;
890                         *credp = NULL;
891                 } else {
892                         *whop = SMB_STRDUP(ldap_state->bind_dn);
893                         if (!*whop) {
894                                 return LDAP_NO_MEMORY;
895                         }
896                         *credp = SMB_STRDUP(ldap_state->bind_secret);
897                         if (!*credp) {
898                                 SAFE_FREE(*whop);
899                                 return LDAP_NO_MEMORY;
900                         }
901                 }
902                 *methodp = LDAP_AUTH_SIMPLE;
903         }
904
905         GetTimeOfDay(&ldap_state->last_rebind);
906                 
907         return 0;
908 }
909 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
910
911 /*******************************************************************
912  a rebind function for authenticated referrals
913  This version takes a void* that we can shove useful stuff in :-)
914  and actually does the connection.
915 ******************************************************************/
916 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
917 static int rebindproc_connect_with_state (LDAP *ldap_struct, 
918                                           LDAP_CONST char *url, 
919                                           ber_tag_t request,
920                                           ber_int_t msgid, void *arg)
921 {
922         struct smbldap_state *ldap_state =
923                 (struct smbldap_state *)arg;
924         int rc;
925         int version;
926
927         DEBUG(5,("rebindproc_connect_with_state: Rebinding to %s as \"%s\"\n", 
928                  url, ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
929
930         /* call START_TLS again (ldaps:// is handled by the OpenLDAP library
931          * itself) before rebinding to another LDAP server to avoid to expose
932          * our credentials. At least *try* to secure the connection - Guenther */
933
934         smb_ldap_upgrade_conn(ldap_struct, &version);
935         smb_ldap_start_tls(ldap_struct, version);
936
937         /** @TODO Should we be doing something to check what servers we rebind to?
938             Could we get a referral to a machine that we don't want to give our
939             username and password to? */
940
941         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
942
943         /* only set the last rebind timestamp when we did rebind after a
944          * non-read LDAP operation. That way we avoid the replication sleep
945          * after a simple redirected search operation - Guenther */
946
947         switch (request) {
948
949                 case LDAP_REQ_MODIFY:
950                 case LDAP_REQ_ADD:
951                 case LDAP_REQ_DELETE:
952                 case LDAP_REQ_MODDN:
953                 case LDAP_REQ_EXTENDED:
954                         DEBUG(10,("rebindproc_connect_with_state: "
955                                 "setting last_rebind timestamp "
956                                 "(req: 0x%02x)\n", (unsigned int)request));
957                         GetTimeOfDay(&ldap_state->last_rebind);
958                         break;
959                 default:
960                         ZERO_STRUCT(ldap_state->last_rebind);
961                         break;
962         }
963
964         return rc;
965 }
966 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
967
968 /*******************************************************************
969  Add a rebind function for authenticated referrals
970 ******************************************************************/
971 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
972 #else
973 # if LDAP_SET_REBIND_PROC_ARGS == 2
974 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
975                        int *method, int freeit )
976 {
977         struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
978
979         return rebindproc_with_state(ldap_struct, whop, credp,
980                                      method, freeit, ldap_state);
981         
982 }
983 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
984 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
985
986 /*******************************************************************
987  a rebind function for authenticated referrals
988  this also does the connection, but no void*.
989 ******************************************************************/
990 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
991 # if LDAP_SET_REBIND_PROC_ARGS == 2
992 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
993                                ber_int_t msgid)
994 {
995         struct smbldap_state *ldap_state = smbldap_find_state(ld);
996
997         return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid, 
998                                              ldap_state);
999 }
1000 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
1001 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1002
1003 /*******************************************************************
1004  connect to the ldap server under system privilege.
1005 ******************************************************************/
1006 static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_struct)
1007 {
1008         int rc;
1009         int version;
1010
1011         if (!ldap_state->anonymous && !ldap_state->bind_dn) {
1012
1013                 /* get the default dn and password only if they are not set already */
1014                 if (!fetch_ldap_pw(&ldap_state->bind_dn, &ldap_state->bind_secret)) {
1015                         DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
1016                         return LDAP_INVALID_CREDENTIALS;
1017                 }
1018         }
1019
1020         /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite 
1021            (OpenLDAP) doesnt' seem to support it */
1022            
1023         DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
1024                   ldap_state->uri, ldap_state->bind_dn));
1025
1026 #ifdef HAVE_LDAP_SET_REBIND_PROC
1027 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1028 # if LDAP_SET_REBIND_PROC_ARGS == 2     
1029         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect); 
1030 # endif
1031 # if LDAP_SET_REBIND_PROC_ARGS == 3     
1032         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);  
1033 # endif
1034 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1035 # if LDAP_SET_REBIND_PROC_ARGS == 2     
1036         ldap_set_rebind_proc(ldap_struct, &rebindproc); 
1037 # endif
1038 # if LDAP_SET_REBIND_PROC_ARGS == 3     
1039         ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);  
1040 # endif
1041 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1042 #endif
1043
1044         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
1045
1046         if (rc != LDAP_SUCCESS) {
1047                 char *ld_error = NULL;
1048                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
1049                                 &ld_error);
1050                 DEBUG(ldap_state->num_failures ? 2 : 0,
1051                       ("failed to bind to server %s with dn=\"%s\" Error: %s\n\t%s\n",
1052                                ldap_state->uri,
1053                                ldap_state->bind_dn ? ldap_state->bind_dn : "[Anonymous bind]",
1054                                ldap_err2string(rc),
1055                                ld_error ? ld_error : "(unknown)"));
1056                 SAFE_FREE(ld_error);
1057                 ldap_state->num_failures++;
1058                 return rc;
1059         }
1060
1061         ldap_state->num_failures = 0;
1062         ldap_state->paged_results = False;
1063
1064         ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
1065
1066         if (smbldap_has_control(ldap_state->ldap_struct, ADS_PAGE_CTL_OID) && version == 3) {
1067                 ldap_state->paged_results = True;
1068         }
1069
1070         DEBUG(3, ("ldap_connect_system: successful connection to the LDAP server\n"));
1071         DEBUGADD(10, ("ldap_connect_system: LDAP server %s support paged results\n", 
1072                 ldap_state->paged_results ? "does" : "does not"));
1073         return rc;
1074 }
1075
1076 static void smbldap_idle_fn(struct event_context *event_ctx,
1077                             struct timed_event *te,
1078                             struct timeval now,
1079                             void *private_data);
1080
1081 /**********************************************************************
1082  Connect to LDAP server (called before every ldap operation)
1083 *********************************************************************/
1084 static int smbldap_open(struct smbldap_state *ldap_state)
1085 {
1086         int rc, opt_rc;
1087         bool reopen = False;
1088         SMB_ASSERT(ldap_state);
1089
1090         if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time(NULL))) {
1091
1092 #ifdef HAVE_UNIXSOCKET
1093                 struct sockaddr_un addr;
1094 #else
1095                 struct sockaddr addr;
1096 #endif
1097                 socklen_t len = sizeof(addr);
1098                 int sd;
1099
1100                 opt_rc = ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd);
1101                 if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 )
1102                         reopen = True;
1103
1104 #ifdef HAVE_UNIXSOCKET
1105                 if (opt_rc == 0 && addr.sun_family == AF_UNIX)
1106                         reopen = True;
1107 #endif
1108                 if (reopen) {
1109                         /* the other end has died. reopen. */
1110                         ldap_unbind(ldap_state->ldap_struct);
1111                         ldap_state->ldap_struct = NULL;
1112                         ldap_state->last_ping = (time_t)0;
1113                 } else {
1114                         ldap_state->last_ping = time(NULL);
1115                 } 
1116         }
1117
1118         if (ldap_state->ldap_struct != NULL) {
1119                 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
1120                 return LDAP_SUCCESS;
1121         }
1122
1123         if ((rc = smbldap_open_connection(ldap_state))) {
1124                 return rc;
1125         }
1126
1127         if ((rc = smbldap_connect_system(ldap_state, ldap_state->ldap_struct))) {
1128                 ldap_unbind(ldap_state->ldap_struct);
1129                 ldap_state->ldap_struct = NULL;
1130                 return rc;
1131         }
1132
1133
1134         ldap_state->last_ping = time(NULL);
1135         ldap_state->pid = sys_getpid();
1136
1137         TALLOC_FREE(ldap_state->idle_event);
1138
1139         if (ldap_state->event_context != NULL) {
1140                 ldap_state->idle_event = event_add_timed(
1141                         ldap_state->event_context, NULL,
1142                         timeval_current_ofs(SMBLDAP_IDLE_TIME, 0),
1143                         smbldap_idle_fn, ldap_state);
1144         }
1145
1146         DEBUG(4,("The LDAP server is successfully connected\n"));
1147
1148         return LDAP_SUCCESS;
1149 }
1150
1151 /**********************************************************************
1152 Disconnect from LDAP server 
1153 *********************************************************************/
1154 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
1155 {
1156         if (!ldap_state)
1157                 return NT_STATUS_INVALID_PARAMETER;
1158                 
1159         if (ldap_state->ldap_struct != NULL) {
1160                 ldap_unbind(ldap_state->ldap_struct);
1161                 ldap_state->ldap_struct = NULL;
1162         }
1163
1164         smbldap_delete_state(ldap_state);
1165         
1166         DEBUG(5,("The connection to the LDAP server was closed\n"));
1167         /* maybe free the results here --metze */
1168         
1169         return NT_STATUS_OK;
1170 }
1171
1172 static bool got_alarm;
1173
1174 static void (*old_handler)(int);
1175
1176 static void gotalarm_sig(int dummy)
1177 {
1178         got_alarm = True;
1179 }
1180
1181 static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
1182                             int *attempts, time_t endtime)
1183 {
1184         time_t now = time(NULL);
1185         int open_rc = LDAP_SERVER_DOWN;
1186
1187         if (*rc != LDAP_SERVER_DOWN)
1188                 goto no_next;
1189
1190         if (now >= endtime) {
1191                 smbldap_close(ldap_state);
1192                 *rc = LDAP_TIMEOUT;
1193                 goto no_next;
1194         }
1195
1196         if (*attempts == 0) {
1197                 got_alarm = False;
1198                 old_handler = CatchSignal(SIGALRM, gotalarm_sig);
1199                 alarm(endtime - now);
1200
1201                 if (ldap_state->pid != sys_getpid())
1202                         smbldap_close(ldap_state);
1203         }
1204
1205         while (1) {
1206
1207                 if (*attempts != 0)
1208                         smb_msleep(1000);
1209
1210                 *attempts += 1;
1211
1212                 open_rc = smbldap_open(ldap_state);
1213
1214                 if (open_rc == LDAP_SUCCESS) {
1215                         ldap_state->last_use = now;
1216                         return True;
1217                 }
1218
1219                 if (open_rc == LDAP_INSUFFICIENT_ACCESS) {
1220                         /* The fact that we are non-root or any other
1221                          * access-denied condition will not change in the next
1222                          * round of trying */
1223                         *rc = open_rc;
1224                         break;
1225                 }
1226
1227                 if (got_alarm) {
1228                         *rc = LDAP_TIMEOUT;
1229                         break;
1230                 }
1231
1232                 if (open_rc != LDAP_SUCCESS) {
1233                         DEBUG(1, ("Connection to LDAP server failed for the "
1234                                   "%d try!\n", *attempts));
1235                 }
1236         }
1237
1238  no_next:
1239         CatchSignal(SIGALRM, old_handler);
1240         alarm(0);
1241         ldap_state->last_use = now;
1242         return False;
1243 }
1244
1245 /*********************************************************************
1246  ********************************************************************/
1247
1248 static int smbldap_search_ext(struct smbldap_state *ldap_state,
1249                               const char *base, int scope, const char *filter, 
1250                               const char *attrs[], int attrsonly,
1251                               LDAPControl **sctrls, LDAPControl **cctrls, 
1252                               int sizelimit, LDAPMessage **res)
1253 {
1254         int             rc = LDAP_SERVER_DOWN;
1255         int             attempts = 0;
1256         char           *utf8_filter;
1257         time_t          endtime = time(NULL)+lp_ldap_timeout();
1258         struct          timeval timeout;
1259         size_t          converted_size;
1260
1261         SMB_ASSERT(ldap_state);
1262         
1263         DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], "
1264                  "scope => [%d]\n", base, filter, scope));
1265
1266         if (ldap_state->last_rebind.tv_sec > 0) {
1267                 struct timeval  tval;
1268                 int64_t tdiff = 0;
1269                 int             sleep_time = 0;
1270
1271                 ZERO_STRUCT(tval);
1272                 GetTimeOfDay(&tval);
1273
1274                 tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
1275                 tdiff /= 1000; /* Convert to milliseconds. */
1276
1277                 sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
1278                 sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
1279
1280                 if (sleep_time > 0) {
1281                         /* we wait for the LDAP replication */
1282                         DEBUG(5,("smbldap_search_ext: waiting %d milliseconds "
1283                                  "for LDAP replication.\n",sleep_time));
1284                         smb_msleep(sleep_time);
1285                         DEBUG(5,("smbldap_search_ext: go on!\n"));
1286                 }
1287                 ZERO_STRUCT(ldap_state->last_rebind);
1288         }
1289
1290         if (!push_utf8_talloc(talloc_tos(), &utf8_filter, filter, &converted_size)) {
1291                 return LDAP_NO_MEMORY;
1292         }
1293
1294         /* Setup timeout for the ldap_search_ext_s call - local and remote. */
1295         timeout.tv_sec = lp_ldap_timeout();
1296         timeout.tv_usec = 0;
1297
1298         /* Setup alarm timeout.... Do we need both of these ? JRA.
1299          * Yes, I think we do need both of these. The server timeout only
1300          * covers the case where the server's operation takes too long. It
1301          * does not cover the case where the request hangs on its way to the
1302          * server. The server side timeout is not strictly necessary, it's
1303          * just a bit more kind to the server. VL. */
1304
1305         got_alarm = 0;
1306         CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
1307         alarm(lp_ldap_timeout());
1308         /* End setup timeout. */
1309
1310         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1311                 rc = ldap_search_ext_s(ldap_state->ldap_struct, base, scope, 
1312                                        utf8_filter,
1313                                        CONST_DISCARD(char **, attrs),
1314                                        attrsonly, sctrls, cctrls, &timeout,
1315                                        sizelimit, res);
1316                 if (rc != LDAP_SUCCESS) {
1317                         char *ld_error = NULL;
1318                         int ld_errno;
1319
1320                         ldap_get_option(ldap_state->ldap_struct,
1321                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1322
1323                         ldap_get_option(ldap_state->ldap_struct,
1324                                         LDAP_OPT_ERROR_STRING, &ld_error);
1325                         DEBUG(10, ("Failed search for base: %s, error: %d (%s) "
1326                                    "(%s)\n", base, ld_errno,
1327                                    ldap_err2string(rc),
1328                                    ld_error ? ld_error : "unknown"));
1329                         SAFE_FREE(ld_error);
1330
1331                         if (ld_errno == LDAP_SERVER_DOWN) {
1332                                 ldap_unbind(ldap_state->ldap_struct);
1333                                 ldap_state->ldap_struct = NULL;
1334                         }
1335                 }
1336         }
1337
1338         TALLOC_FREE(utf8_filter);
1339
1340         /* Teardown timeout. */
1341         CatchSignal(SIGALRM, SIGNAL_CAST SIG_IGN);
1342         alarm(0);
1343
1344         if (got_alarm != 0)
1345                 return LDAP_TIMELIMIT_EXCEEDED;
1346
1347         return rc;
1348 }
1349
1350 int smbldap_search(struct smbldap_state *ldap_state, 
1351                    const char *base, int scope, const char *filter, 
1352                    const char *attrs[], int attrsonly, 
1353                    LDAPMessage **res)
1354 {
1355         return smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1356                                   attrsonly, NULL, NULL, LDAP_NO_LIMIT, res);
1357 }
1358
1359 int smbldap_search_paged(struct smbldap_state *ldap_state, 
1360                          const char *base, int scope, const char *filter, 
1361                          const char **attrs, int attrsonly, int pagesize,
1362                          LDAPMessage **res, void **cookie)
1363 {
1364         LDAPControl     pr;
1365         LDAPControl     **rcontrols;
1366         LDAPControl     *controls[2] = { NULL, NULL};
1367         BerElement      *cookie_be = NULL;
1368         struct berval   *cookie_bv = NULL;
1369         int             tmp = 0, i, rc;
1370         bool            critical = True;
1371
1372         *res = NULL;
1373
1374         DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s],"
1375                  "scope => [%d], pagesize => [%d]\n",
1376                  base, filter, scope, pagesize));
1377
1378         cookie_be = ber_alloc_t(LBER_USE_DER);
1379         if (cookie_be == NULL) {
1380                 DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns "
1381                          "NULL\n"));
1382                 return LDAP_NO_MEMORY;
1383         }
1384
1385         /* construct cookie */
1386         if (*cookie != NULL) {
1387                 ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie);
1388                 ber_bvfree((struct berval *)*cookie); /* don't need it from last time */
1389                 *cookie = NULL;
1390         } else {
1391                 ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0);
1392         }
1393         ber_flatten(cookie_be, &cookie_bv);
1394
1395         pr.ldctl_oid = CONST_DISCARD(char *, ADS_PAGE_CTL_OID);
1396         pr.ldctl_iscritical = (char) critical;
1397         pr.ldctl_value.bv_len = cookie_bv->bv_len;
1398         pr.ldctl_value.bv_val = cookie_bv->bv_val;
1399
1400         controls[0] = &pr;
1401         controls[1] = NULL;
1402
1403         rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs, 
1404                                  0, controls, NULL, LDAP_NO_LIMIT, res);
1405
1406         ber_free(cookie_be, 1);
1407         ber_bvfree(cookie_bv);
1408
1409         if (rc != 0) {
1410                 DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) "
1411                          "failed with [%s]\n", filter, ldap_err2string(rc)));
1412                 goto done;
1413         }
1414
1415         DEBUG(3,("smbldap_search_paged: search was successfull\n"));
1416
1417         rc = ldap_parse_result(ldap_state->ldap_struct, *res, NULL, NULL, 
1418                                NULL, NULL, &rcontrols,  0);
1419         if (rc != 0) {
1420                 DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \
1421                          "with [%s]\n", ldap_err2string(rc)));
1422                 goto done;
1423         }
1424
1425         if (rcontrols == NULL)
1426                 goto done;
1427
1428         for (i=0; rcontrols[i]; i++) {
1429
1430                 if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0)
1431                         continue;
1432
1433                 cookie_be = ber_init(&rcontrols[i]->ldctl_value);
1434                 ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv);
1435                 /* the berval is the cookie, but must be freed when it is all
1436                    done */
1437                 if (cookie_bv->bv_len)
1438                         *cookie=ber_bvdup(cookie_bv);
1439                 else
1440                         *cookie=NULL;
1441                 ber_bvfree(cookie_bv);
1442                 ber_free(cookie_be, 1);
1443                 break;
1444         }
1445         ldap_controls_free(rcontrols);
1446 done:   
1447         return rc;
1448 }
1449
1450 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1451 {
1452         int             rc = LDAP_SERVER_DOWN;
1453         int             attempts = 0;
1454         char           *utf8_dn;
1455         time_t          endtime = time(NULL)+lp_ldap_timeout();
1456         size_t          converted_size;
1457
1458         SMB_ASSERT(ldap_state);
1459
1460         DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1461
1462         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1463                 return LDAP_NO_MEMORY;
1464         }
1465
1466         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1467                 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1468                 if (rc != LDAP_SUCCESS) {
1469                         char *ld_error = NULL;
1470                         int ld_errno;
1471
1472                         ldap_get_option(ldap_state->ldap_struct,
1473                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1474
1475                         ldap_get_option(ldap_state->ldap_struct,
1476                                         LDAP_OPT_ERROR_STRING, &ld_error);
1477                         DEBUG(10, ("Failed to modify dn: %s, error: %d (%s) "
1478                                    "(%s)\n", dn, ld_errno,
1479                                    ldap_err2string(rc),
1480                                    ld_error ? ld_error : "unknown"));
1481                         SAFE_FREE(ld_error);
1482
1483                         if (ld_errno == LDAP_SERVER_DOWN) {
1484                                 ldap_unbind(ldap_state->ldap_struct);
1485                                 ldap_state->ldap_struct = NULL;
1486                         }
1487                 }
1488         }
1489                 
1490         TALLOC_FREE(utf8_dn);
1491         return rc;
1492 }
1493
1494 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1495 {
1496         int             rc = LDAP_SERVER_DOWN;
1497         int             attempts = 0;
1498         char           *utf8_dn;
1499         time_t          endtime = time(NULL)+lp_ldap_timeout();
1500         size_t          converted_size;
1501         
1502         SMB_ASSERT(ldap_state);
1503
1504         DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1505
1506         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1507                 return LDAP_NO_MEMORY;
1508         }
1509
1510         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1511                 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1512                 if (rc != LDAP_SUCCESS) {
1513                         char *ld_error = NULL;
1514                         int ld_errno;
1515
1516                         ldap_get_option(ldap_state->ldap_struct,
1517                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1518
1519                         ldap_get_option(ldap_state->ldap_struct,
1520                                         LDAP_OPT_ERROR_STRING, &ld_error);
1521                         DEBUG(10, ("Failed to add dn: %s, error: %d (%s) "
1522                                    "(%s)\n", dn, ld_errno,
1523                                    ldap_err2string(rc),
1524                                    ld_error ? ld_error : "unknown"));
1525                         SAFE_FREE(ld_error);
1526
1527                         if (ld_errno == LDAP_SERVER_DOWN) {
1528                                 ldap_unbind(ldap_state->ldap_struct);
1529                                 ldap_state->ldap_struct = NULL;
1530                         }
1531                 }
1532         }
1533         
1534         TALLOC_FREE(utf8_dn);
1535         return rc;
1536 }
1537
1538 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1539 {
1540         int             rc = LDAP_SERVER_DOWN;
1541         int             attempts = 0;
1542         char           *utf8_dn;
1543         time_t          endtime = time(NULL)+lp_ldap_timeout();
1544         size_t          converted_size;
1545         
1546         SMB_ASSERT(ldap_state);
1547
1548         DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1549
1550         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1551                 return LDAP_NO_MEMORY;
1552         }
1553
1554         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1555                 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1556                 if (rc != LDAP_SUCCESS) {
1557                         char *ld_error = NULL;
1558                         int ld_errno;
1559
1560                         ldap_get_option(ldap_state->ldap_struct,
1561                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1562
1563                         ldap_get_option(ldap_state->ldap_struct,
1564                                         LDAP_OPT_ERROR_STRING, &ld_error);
1565                         DEBUG(10, ("Failed to delete dn: %s, error: %d (%s) "
1566                                    "(%s)\n", dn, ld_errno,
1567                                    ldap_err2string(rc),
1568                                    ld_error ? ld_error : "unknown"));
1569                         SAFE_FREE(ld_error);
1570
1571                         if (ld_errno == LDAP_SERVER_DOWN) {
1572                                 ldap_unbind(ldap_state->ldap_struct);
1573                                 ldap_state->ldap_struct = NULL;
1574                         }
1575                 }
1576         }
1577         
1578         TALLOC_FREE(utf8_dn);
1579         return rc;
1580 }
1581
1582 int smbldap_extended_operation(struct smbldap_state *ldap_state, 
1583                                LDAP_CONST char *reqoid, struct berval *reqdata, 
1584                                LDAPControl **serverctrls, LDAPControl **clientctrls, 
1585                                char **retoidp, struct berval **retdatap)
1586 {
1587         int             rc = LDAP_SERVER_DOWN;
1588         int             attempts = 0;
1589         time_t          endtime = time(NULL)+lp_ldap_timeout();
1590         
1591         if (!ldap_state)
1592                 return (-1);
1593
1594         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1595                 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
1596                                                reqdata, serverctrls,
1597                                                clientctrls, retoidp, retdatap);
1598                 if (rc != LDAP_SUCCESS) {
1599                         char *ld_error = NULL;
1600                         int ld_errno;
1601
1602                         ldap_get_option(ldap_state->ldap_struct,
1603                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1604
1605                         ldap_get_option(ldap_state->ldap_struct,
1606                                         LDAP_OPT_ERROR_STRING, &ld_error);
1607                         DEBUG(10, ("Extended operation failed with error: "
1608                                    "%d (%s) (%s)\n", ld_errno,
1609                                    ldap_err2string(rc),
1610                                    ld_error ? ld_error : "unknown"));
1611                         SAFE_FREE(ld_error);
1612
1613                         if (ld_errno == LDAP_SERVER_DOWN) {
1614                                 ldap_unbind(ldap_state->ldap_struct);
1615                                 ldap_state->ldap_struct = NULL;
1616                         }
1617                 }
1618         }
1619                 
1620         return rc;
1621 }
1622
1623 /*******************************************************************
1624  run the search by name.
1625 ******************************************************************/
1626 int smbldap_search_suffix (struct smbldap_state *ldap_state,
1627                            const char *filter, const char **search_attr,
1628                            LDAPMessage ** result)
1629 {
1630         return smbldap_search(ldap_state, lp_ldap_suffix(), LDAP_SCOPE_SUBTREE,
1631                               filter, search_attr, 0, result);
1632 }
1633
1634 static void smbldap_idle_fn(struct event_context *event_ctx,
1635                             struct timed_event *te,
1636                             struct timeval now,
1637                             void *private_data)
1638 {
1639         struct smbldap_state *state = (struct smbldap_state *)private_data;
1640
1641         TALLOC_FREE(state->idle_event);
1642
1643         if (state->ldap_struct == NULL) {
1644                 DEBUG(10,("ldap connection not connected...\n"));
1645                 return;
1646         }
1647                 
1648         if ((state->last_use+SMBLDAP_IDLE_TIME) > now.tv_sec) {
1649                 DEBUG(10,("ldap connection not idle...\n"));
1650
1651                 state->idle_event = event_add_timed(
1652                         event_ctx, NULL,
1653                         timeval_add(&now, SMBLDAP_IDLE_TIME, 0),
1654                         smbldap_idle_fn,
1655                         private_data);
1656                 return;
1657         }
1658                 
1659         DEBUG(7,("ldap connection idle...closing connection\n"));
1660         smbldap_close(state);
1661 }
1662
1663 /**********************************************************************
1664  Housekeeping
1665  *********************************************************************/
1666
1667 void smbldap_free_struct(struct smbldap_state **ldap_state) 
1668 {
1669         smbldap_close(*ldap_state);
1670         
1671         if ((*ldap_state)->bind_secret) {
1672                 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1673         }
1674
1675         SAFE_FREE((*ldap_state)->bind_dn);
1676         SAFE_FREE((*ldap_state)->bind_secret);
1677
1678         TALLOC_FREE((*ldap_state)->idle_event);
1679
1680         *ldap_state = NULL;
1681
1682         /* No need to free any further, as it is talloc()ed */
1683 }
1684
1685
1686 /**********************************************************************
1687  Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1688  *********************************************************************/
1689
1690 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, struct event_context *event_ctx,
1691                       const char *location,
1692                       struct smbldap_state **smbldap_state)
1693 {
1694         *smbldap_state = TALLOC_ZERO_P(mem_ctx, struct smbldap_state);
1695         if (!*smbldap_state) {
1696                 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1697                 return NT_STATUS_NO_MEMORY;
1698         }
1699
1700         if (location) {
1701                 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1702         } else {
1703                 (*smbldap_state)->uri = "ldap://localhost";
1704         }
1705
1706         (*smbldap_state)->event_context = event_ctx;
1707
1708         return NT_STATUS_OK;
1709 }
1710
1711  char *smbldap_talloc_dn(TALLOC_CTX *mem_ctx, LDAP *ld,
1712                          LDAPMessage *entry)
1713 {
1714         char *utf8_dn, *unix_dn;
1715         size_t converted_size;
1716
1717         utf8_dn = ldap_get_dn(ld, entry);
1718         if (!utf8_dn) {
1719                 DEBUG (5, ("smbldap_talloc_dn: ldap_get_dn failed\n"));
1720                 return NULL;
1721         }
1722         if (!pull_utf8_talloc(mem_ctx, &unix_dn, utf8_dn, &converted_size)) {
1723                 DEBUG (0, ("smbldap_talloc_dn: String conversion failure utf8 "
1724                            "[%s]\n", utf8_dn));
1725                 return NULL;
1726         }
1727         ldap_memfree(utf8_dn);
1728         return unix_dn;
1729 }
1730
1731 /*******************************************************************
1732  Check if root-dse has a certain Control or Extension
1733 ********************************************************************/
1734
1735 static bool smbldap_check_root_dse(LDAP *ld, const char **attrs, const char *value) 
1736 {
1737         LDAPMessage *msg = NULL;
1738         LDAPMessage *entry = NULL;
1739         char **values = NULL;
1740         int rc, num_result, num_values, i;
1741         bool result = False;
1742
1743         if (!attrs[0]) {
1744                 DEBUG(3,("smbldap_check_root_dse: nothing to look for\n"));
1745                 return False;
1746         }
1747
1748         if (!strequal(attrs[0], "supportedExtension") && 
1749             !strequal(attrs[0], "supportedControl") && 
1750             !strequal(attrs[0], "namingContexts")) {
1751                 DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0]));
1752                 return False;
1753         }
1754
1755         rc = ldap_search_s(ld, "", LDAP_SCOPE_BASE, 
1756                            "(objectclass=*)", CONST_DISCARD(char **, attrs), 0 , &msg);
1757
1758         if (rc != LDAP_SUCCESS) {
1759                 DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n"));
1760                 return False;
1761         }
1762
1763         num_result = ldap_count_entries(ld, msg);
1764
1765         if (num_result != 1) {
1766                 DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result));
1767                 goto done;
1768         }
1769
1770         entry = ldap_first_entry(ld, msg);
1771
1772         if (entry == NULL) {
1773                 DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n"));
1774                 goto done;
1775         }
1776
1777         values = ldap_get_values(ld, entry, attrs[0]);
1778
1779         if (values == NULL) {
1780                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0]));
1781                 goto done;
1782         }
1783
1784         num_values = ldap_count_values(values);
1785
1786         if (num_values == 0) {
1787                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0]));
1788                 goto done;
1789         }
1790
1791         for (i=0; i<num_values; i++) {
1792                 if (strcmp(values[i], value) == 0)
1793                         result = True;
1794         }
1795
1796
1797  done:
1798         if (values != NULL)
1799                 ldap_value_free(values);
1800         if (msg != NULL)
1801                 ldap_msgfree(msg);
1802
1803         return result;
1804
1805 }
1806
1807 /*******************************************************************
1808  Check if LDAP-Server supports a certain Control (OID in string format)
1809 ********************************************************************/
1810
1811 bool smbldap_has_control(LDAP *ld, const char *control)
1812 {
1813         const char *attrs[] = { "supportedControl", NULL };
1814         return smbldap_check_root_dse(ld, attrs, control);
1815 }
1816
1817 /*******************************************************************
1818  Check if LDAP-Server supports a certain Extension (OID in string format)
1819 ********************************************************************/
1820
1821 bool smbldap_has_extension(LDAP *ld, const char *extension)
1822 {
1823         const char *attrs[] = { "supportedExtension", NULL };
1824         return smbldap_check_root_dse(ld, attrs, extension);
1825 }
1826
1827 /*******************************************************************
1828  Check if LDAP-Server holds a given namingContext
1829 ********************************************************************/
1830
1831 bool smbldap_has_naming_context(LDAP *ld, const char *naming_context)
1832 {
1833         const char *attrs[] = { "namingContexts", NULL };
1834         return smbldap_check_root_dse(ld, attrs, naming_context);
1835 }
1836
1837 bool smbldap_set_creds(struct smbldap_state *ldap_state, bool anon, const char *dn, const char *secret)
1838 {
1839         ldap_state->anonymous = anon;
1840
1841         /* free any previously set credential */
1842
1843         SAFE_FREE(ldap_state->bind_dn);
1844         if (ldap_state->bind_secret) {
1845                 /* make sure secrets are zeroed out of memory */
1846                 memset(ldap_state->bind_secret, '\0', strlen(ldap_state->bind_secret));
1847                 SAFE_FREE(ldap_state->bind_secret);
1848         }
1849
1850         if ( ! anon) {
1851                 ldap_state->bind_dn = SMB_STRDUP(dn);
1852                 ldap_state->bind_secret = SMB_STRDUP(secret);
1853         }
1854
1855         return True;
1856 }