a1f42d92ee01e09ae1d35046dd4516f21fb89975
[tprouty/samba.git] / source / lib / smbldap.c
1 /* 
2    Unix SMB/CIFS mplementation.
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 2 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, write to the Free Software
22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23    
24 */
25
26 #include "includes.h"
27 #include "smbldap.h"
28
29 #ifndef LDAP_OPT_SUCCESS
30 #define LDAP_OPT_SUCCESS 0
31 #endif
32
33 /* Try not to hit the up or down server forever */
34
35 #define SMBLDAP_DONT_PING_TIME 10       /* ping only all 10 seconds */
36 #define SMBLDAP_NUM_RETRIES 8           /* retry only 8 times */
37
38 #define SMBLDAP_IDLE_TIME 150           /* After 2.5 minutes disconnect */
39
40
41 /* attributes used by Samba 2.2 */
42
43 ATTRIB_MAP_ENTRY attrib_map_v22[] = {
44         { LDAP_ATTR_UID,                "uid"           },
45         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
46         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
47         { LDAP_ATTR_UNIX_HOME,          "homeDirectory" },
48         { LDAP_ATTR_PWD_LAST_SET,       "pwdLastSet"    },
49         { LDAP_ATTR_PWD_CAN_CHANGE,     "pwdCanChange"  },
50         { LDAP_ATTR_PWD_MUST_CHANGE,    "pwdMustChange" },
51         { LDAP_ATTR_LOGON_TIME,         "logonTime"     },
52         { LDAP_ATTR_LOGOFF_TIME,        "logoffTime"    },
53         { LDAP_ATTR_KICKOFF_TIME,       "kickoffTime"   },
54         { LDAP_ATTR_CN,                 "cn"            },
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_DISPLAY_NAME,       "displayName"           },
110         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
111         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
112         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
113         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
114         { LDAP_ATTR_DESC,               "description"           },
115         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
116         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
117         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
118         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
119         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
120         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
121         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
122         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
123         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
124         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
125         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
126         { LDAP_ATTR_PWD_HISTORY,        "sambaPasswordHistory"  },
127         { LDAP_ATTR_MOD_TIMESTAMP,      "modifyTimestamp"       },
128         { LDAP_ATTR_LOGON_HOURS,        "sambaLogonHours"       },
129         { LDAP_ATTR_LIST_END,           NULL                    }
130 };
131
132 ATTRIB_MAP_ENTRY attrib_map_to_delete_v30[] = {
133         { LDAP_ATTR_PWD_LAST_SET,       "sambaPwdLastSet"       },
134         { LDAP_ATTR_PWD_CAN_CHANGE,     "sambaPwdCanChange"     },
135         { LDAP_ATTR_PWD_MUST_CHANGE,    "sambaPwdMustChange"    },
136         { LDAP_ATTR_LOGON_TIME,         "sambaLogonTime"        },
137         { LDAP_ATTR_LOGOFF_TIME,        "sambaLogoffTime"       },
138         { LDAP_ATTR_KICKOFF_TIME,       "sambaKickoffTime"      },
139         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
140         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
141         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
142         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
143         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
144         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
145         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
146         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
147         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
148         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
149         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
150         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
151         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
152         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
153         { LDAP_ATTR_PWD_HISTORY,        "sambaPasswordHistory"  },
154         { LDAP_ATTR_LOGON_HOURS,        "sambaLogonHours"       },
155         { LDAP_ATTR_LIST_END,           NULL                    }
156 };
157
158 /* attributes used for allocating RIDs */
159
160 ATTRIB_MAP_ENTRY dominfo_attr_list[] = {
161         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
162         { LDAP_ATTR_NEXT_RID,           "sambaNextRid"          },
163         { LDAP_ATTR_NEXT_USERRID,       "sambaNextUserRid"      },
164         { LDAP_ATTR_NEXT_GROUPRID,      "sambaNextGroupRid"     },
165         { LDAP_ATTR_DOM_SID,            LDAP_ATTRIBUTE_SID      },
166         { LDAP_ATTR_ALGORITHMIC_RID_BASE,"sambaAlgorithmicRidBase"},
167         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
168         { LDAP_ATTR_LIST_END,           NULL                    },
169 };
170
171 /* Samba 3.0 group mapping attributes */
172
173 ATTRIB_MAP_ENTRY groupmap_attr_list[] = {
174         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
175         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
176         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
177         { LDAP_ATTR_SID_LIST,           "sambaSIDList"          },
178         { LDAP_ATTR_DESC,               "description"           },
179         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
180         { LDAP_ATTR_CN,                 "cn"                    },
181         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
182         { LDAP_ATTR_LIST_END,           NULL                    }       
183 };
184
185 ATTRIB_MAP_ENTRY groupmap_attr_list_to_delete[] = {
186         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
187         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
188         { LDAP_ATTR_DESC,               "description"           },
189         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
190         { LDAP_ATTR_SID_LIST,           "sambaSIDList"          },
191         { LDAP_ATTR_LIST_END,           NULL                    }       
192 };
193
194 /* idmap_ldap sambaUnixIdPool */
195
196 ATTRIB_MAP_ENTRY idpool_attr_list[] = {
197         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
198         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
199         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
200         { LDAP_ATTR_LIST_END,           NULL                    }       
201 };
202
203 ATTRIB_MAP_ENTRY sidmap_attr_list[] = {
204         { LDAP_ATTR_SID,                LDAP_ATTRIBUTE_SID      },
205         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
206         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
207         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
208         { LDAP_ATTR_LIST_END,           NULL                    }       
209 };
210
211 /**********************************************************************
212  perform a simple table lookup and return the attribute name 
213  **********************************************************************/
214  
215  const char* get_attr_key2string( ATTRIB_MAP_ENTRY table[], int key )
216 {
217         int i = 0;
218         
219         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
220                 if ( table[i].attrib == key )
221                         return table[i].name;
222                 i++;
223         }
224         
225         return NULL;
226 }
227
228
229 /**********************************************************************
230  Return the list of attribute names from a mapping table
231  **********************************************************************/
232
233  char** get_attr_list( ATTRIB_MAP_ENTRY table[] )
234 {
235         char **names;
236         int i = 0;
237         
238         while ( table[i].attrib != LDAP_ATTR_LIST_END )
239                 i++;
240         i++;
241
242         names = (char**)malloc( sizeof(char*)*i );
243         if ( !names ) {
244                 DEBUG(0,("get_attr_list: out of memory\n"));
245                 return NULL;
246         }
247
248         i = 0;
249         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
250                 names[i] = strdup( table[i].name );
251                 i++;
252         }
253         names[i] = NULL;
254         
255         return names;
256 }
257
258 /*********************************************************************
259  Cleanup 
260  ********************************************************************/
261
262  void free_attr_list( char **list )
263 {
264         int i = 0;
265
266         if ( !list )
267                 return; 
268
269         while ( list[i] ) {
270                 SAFE_FREE( list[i] );
271                 i+=1;
272         }
273
274         SAFE_FREE( list );
275 }
276
277 /*******************************************************************
278  find the ldap password
279 ******************************************************************/
280 static BOOL fetch_ldap_pw(char **dn, char** pw)
281 {
282         char *key = NULL;
283         size_t size;
284         
285         *dn = smb_xstrdup(lp_ldap_admin_dn());
286         
287         if (asprintf(&key, "%s/%s", SECRETS_LDAP_BIND_PW, *dn) < 0) {
288                 SAFE_FREE(*dn);
289                 DEBUG(0, ("fetch_ldap_pw: asprintf failed!\n"));
290         }
291         
292         *pw=secrets_fetch(key, &size);
293         SAFE_FREE(key);
294
295         if (!size) {
296                 /* Upgrade 2.2 style entry */
297                 char *p;
298                 char* old_style_key = strdup(*dn);
299                 char *data;
300                 fstring old_style_pw;
301                 
302                 if (!old_style_key) {
303                         DEBUG(0, ("fetch_ldap_pw: strdup failed!\n"));
304                         return False;
305                 }
306
307                 for (p=old_style_key; *p; p++)
308                         if (*p == ',') *p = '/';
309         
310                 data=secrets_fetch(old_style_key, &size);
311                 if (!size && size < sizeof(old_style_pw)) {
312                         DEBUG(0,("fetch_ldap_pw: neither ldap secret retrieved!\n"));
313                         SAFE_FREE(old_style_key);
314                         SAFE_FREE(*dn);
315                         return False;
316                 }
317
318                 size = MIN(size, sizeof(fstring)-1);
319                 strncpy(old_style_pw, data, size);
320                 old_style_pw[size] = 0;
321
322                 SAFE_FREE(data);
323
324                 if (!secrets_store_ldap_pw(*dn, old_style_pw)) {
325                         DEBUG(0,("fetch_ldap_pw: ldap secret could not be upgraded!\n"));
326                         SAFE_FREE(old_style_key);
327                         SAFE_FREE(*dn);
328                         return False;                   
329                 }
330                 if (!secrets_delete(old_style_key)) {
331                         DEBUG(0,("fetch_ldap_pw: old ldap secret could not be deleted!\n"));
332                 }
333
334                 SAFE_FREE(old_style_key);
335
336                 *pw = smb_xstrdup(old_style_pw);                
337         }
338         
339         return True;
340 }
341
342 /*******************************************************************
343  Search an attribute and return the first value found.
344 ******************************************************************/
345
346  BOOL smbldap_get_single_attribute (LDAP * ldap_struct, LDAPMessage * entry,
347                                     const char *attribute, char *value,
348                                     int max_len)
349 {
350         char **values;
351         
352         if ( !attribute )
353                 return False;
354                 
355         value[0] = '\0';
356
357         if ((values = ldap_get_values (ldap_struct, entry, attribute)) == NULL) {
358                 DEBUG (10, ("smbldap_get_single_attribute: [%s] = [<does not exist>]\n", attribute));
359                 
360                 return False;
361         }
362         
363         if (convert_string(CH_UTF8, CH_UNIX,values[0], -1, value, max_len, False) == (size_t)-1) {
364                 DEBUG(1, ("smbldap_get_single_attribute: string conversion of [%s] = [%s] failed!\n", 
365                           attribute, values[0]));
366                 ldap_value_free(values);
367                 return False;
368         }
369         
370         ldap_value_free(values);
371 #ifdef DEBUG_PASSWORDS
372         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n", attribute, value));
373 #endif  
374         return True;
375 }
376
377  BOOL smbldap_get_single_pstring (LDAP * ldap_struct, LDAPMessage * entry,
378                                   const char *attribute, pstring value)
379 {
380         return smbldap_get_single_attribute(ldap_struct, entry,
381                                             attribute, value, 
382                                             sizeof(pstring));
383 }
384
385 /************************************************************************
386  Routine to manage the LDAPMod structure array
387  manage memory used by the array, by each struct, and values
388  ***********************************************************************/
389
390  void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
391 {
392         LDAPMod **mods;
393         int i;
394         int j;
395
396         mods = *modlist;
397
398         /* sanity checks on the mod values */
399
400         if (attribute == NULL || *attribute == '\0') {
401                 return; 
402         }
403
404 #if 0   /* commented out after discussion with abartlet.  Do not reenable.
405            left here so other so re-add similar code   --jerry */
406         if (value == NULL || *value == '\0')
407                 return;
408 #endif
409
410         if (mods == NULL) {
411                 mods = (LDAPMod **) malloc(sizeof(LDAPMod *));
412                 if (mods == NULL) {
413                         DEBUG(0, ("make_a_mod: out of memory!\n"));
414                         return;
415                 }
416                 mods[0] = NULL;
417         }
418
419         for (i = 0; mods[i] != NULL; ++i) {
420                 if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
421                         break;
422         }
423
424         if (mods[i] == NULL) {
425                 mods = (LDAPMod **) Realloc (mods, (i + 2) * sizeof (LDAPMod *));
426                 if (mods == NULL) {
427                         DEBUG(0, ("make_a_mod: out of memory!\n"));
428                         return;
429                 }
430                 mods[i] = (LDAPMod *) malloc(sizeof(LDAPMod));
431                 if (mods[i] == NULL) {
432                         DEBUG(0, ("make_a_mod: out of memory!\n"));
433                         return;
434                 }
435                 mods[i]->mod_op = modop;
436                 mods[i]->mod_values = NULL;
437                 mods[i]->mod_type = strdup(attribute);
438                 mods[i + 1] = NULL;
439         }
440
441         if (value != NULL) {
442                 char *utf8_value = NULL;
443
444                 j = 0;
445                 if (mods[i]->mod_values != NULL) {
446                         for (; mods[i]->mod_values[j] != NULL; j++);
447                 }
448                 mods[i]->mod_values = (char **)Realloc(mods[i]->mod_values,
449                                                (j + 2) * sizeof (char *));
450                                                
451                 if (mods[i]->mod_values == NULL) {
452                         DEBUG (0, ("make_a_mod: Memory allocation failure!\n"));
453                         return;
454                 }
455
456                 if (push_utf8_allocate(&utf8_value, value) == (size_t)-1) {
457                         DEBUG (0, ("make_a_mod: String conversion failure!\n"));
458                         return;
459                 }
460
461                 mods[i]->mod_values[j] = utf8_value;
462
463                 mods[i]->mod_values[j + 1] = NULL;
464         }
465         *modlist = mods;
466 }
467
468 /**********************************************************************
469   Set attribute to newval in LDAP, regardless of what value the
470   attribute had in LDAP before.
471 *********************************************************************/
472
473  void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
474                       LDAPMod ***mods,
475                       const char *attribute, const char *newval)
476 {
477         char oldval[2048]; /* current largest allowed value is mungeddial */
478         BOOL existed;
479
480         if (attribute == NULL) {
481                 /* This can actually happen for ldapsam_compat where we for
482                  * example don't have a password history */
483                 return;
484         }
485
486         if (existing != NULL) {
487                 existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
488         } else {
489                 existed = False;
490                 *oldval = '\0';
491         }
492
493         /* all of our string attributes are case insensitive */
494         
495         if (existed && newval && (StrCaseCmp(oldval, newval) == 0)) {
496                 
497                 /* Believe it or not, but LDAP will deny a delete and
498                    an add at the same time if the values are the
499                    same... */
500                 return;
501         }
502
503         if (existed) {
504                 /* There has been no value before, so don't delete it.
505                  * Here's a possible race: We might end up with
506                  * duplicate attributes */
507                 /* By deleting exactly the value we found in the entry this
508                  * should be race-free in the sense that the LDAP-Server will
509                  * deny the complete operation if somebody changed the
510                  * attribute behind our back. */
511                 /* This will also allow modifying single valued attributes 
512                  * in Novell NDS. In NDS you have to first remove attribute and then
513                  * you could add new value */
514                 
515                 smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
516         }
517
518         /* Regardless of the real operation (add or modify)
519            we add the new value here. We rely on deleting
520            the old value, should it exist. */
521
522         if ((newval != NULL) && (strlen(newval) > 0)) {
523                 smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
524         }
525 }
526
527 /**********************************************************************
528  Some varients of the LDAP rebind code do not pass in the third 'arg' 
529  pointer to a void*, so we try and work around it by assuming that the 
530  value of the 'LDAP *' pointer is the same as the one we had passed in
531  **********************************************************************/
532
533 struct smbldap_state_lookup {
534         LDAP *ld;
535         struct smbldap_state *smbldap_state;
536         struct smbldap_state_lookup *prev, *next;
537 };
538
539 static struct smbldap_state_lookup *smbldap_state_lookup_list;
540
541 static struct smbldap_state *smbldap_find_state(LDAP *ld) 
542 {
543         struct smbldap_state_lookup *t;
544
545         for (t = smbldap_state_lookup_list; t; t = t->next) {
546                 if (t->ld == ld) {
547                         return t->smbldap_state;
548                 }
549         }
550         return NULL;
551 }
552
553 static void smbldap_delete_state(struct smbldap_state *smbldap_state) 
554 {
555         struct smbldap_state_lookup *t;
556
557         for (t = smbldap_state_lookup_list; t; t = t->next) {
558                 if (t->smbldap_state == smbldap_state) {
559                         DLIST_REMOVE(smbldap_state_lookup_list, t);
560                         SAFE_FREE(t);
561                         return;
562                 }
563         }
564 }
565
566 static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state) 
567 {
568         struct smbldap_state *tmp_ldap_state;
569         struct smbldap_state_lookup *t;
570         struct smbldap_state_lookup *tmp;
571         
572         if ((tmp_ldap_state = smbldap_find_state(ld))) {
573                 SMB_ASSERT(tmp_ldap_state == smbldap_state);
574                 return;
575         }
576
577         t = smb_xmalloc(sizeof(*t));
578         ZERO_STRUCTP(t);
579         
580         DLIST_ADD_END(smbldap_state_lookup_list, t, tmp);
581         t->ld = ld;
582         t->smbldap_state = smbldap_state;
583 }
584
585 /*******************************************************************
586  open a connection to the ldap server.
587 ******************************************************************/
588 static int smbldap_open_connection (struct smbldap_state *ldap_state)
589
590 {
591         int rc = LDAP_SUCCESS;
592         int version;
593         BOOL ldap_v3 = False;
594         LDAP **ldap_struct = &ldap_state->ldap_struct;
595
596 #ifdef HAVE_LDAP_INITIALIZE
597         DEBUG(10, ("smbldap_open_connection: %s\n", ldap_state->uri));
598         
599         if ((rc = ldap_initialize(ldap_struct, ldap_state->uri)) != LDAP_SUCCESS) {
600                 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
601                 return rc;
602         }
603 #else 
604
605         /* Parse the string manually */
606
607         {
608                 int port = 0;
609                 fstring protocol;
610                 fstring host;
611                 const char *p = ldap_state->uri; 
612                 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
613                 
614                 /* skip leading "URL:" (if any) */
615                 if ( strnequal( p, "URL:", 4 ) ) {
616                         p += 4;
617                 }
618                 
619                 sscanf(p, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
620                 
621                 if (port == 0) {
622                         if (strequal(protocol, "ldap")) {
623                                 port = LDAP_PORT;
624                         } else if (strequal(protocol, "ldaps")) {
625                                 port = LDAPS_PORT;
626                         } else {
627                                 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
628                         }
629                 }
630                 
631                 if ((*ldap_struct = ldap_init(host, port)) == NULL)     {
632                         DEBUG(0, ("ldap_init failed !\n"));
633                         return LDAP_OPERATIONS_ERROR;
634                 }
635                 
636                 if (strequal(protocol, "ldaps")) {
637 #ifdef LDAP_OPT_X_TLS
638                         int tls = LDAP_OPT_X_TLS_HARD;
639                         if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
640                         {
641                                 DEBUG(0, ("Failed to setup a TLS session\n"));
642                         }
643                         
644                         DEBUG(3,("LDAPS option set...!\n"));
645 #else
646                         DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
647                         return LDAP_OPERATIONS_ERROR;
648 #endif
649                 }
650         }
651 #endif
652
653         /* Store the LDAP pointer in a lookup list */
654
655         smbldap_store_state(*ldap_struct, ldap_state);
656
657         /* Upgrade to LDAPv3 if possible */
658
659         if (ldap_get_option(*ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version) == LDAP_OPT_SUCCESS)
660         {
661                 if (version != LDAP_VERSION3)
662                 {
663                         version = LDAP_VERSION3;
664                         if (ldap_set_option (*ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version) == LDAP_OPT_SUCCESS) {
665                                 ldap_v3 = True;
666                         }
667                 } else {
668                         ldap_v3 = True;
669                 }
670         }
671
672         if (lp_ldap_ssl() == LDAP_SSL_START_TLS) {
673 #ifdef LDAP_OPT_X_TLS
674                 if (ldap_v3) {
675                         if ((rc = ldap_start_tls_s (*ldap_struct, NULL, NULL)) != LDAP_SUCCESS)
676                         {
677                                 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
678                                          ldap_err2string(rc)));
679                                 return rc;
680                         }
681                         DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
682                 } else {
683                         
684                         DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
685                         return LDAP_OPERATIONS_ERROR;
686                 }
687 #else
688                 DEBUG(0,("smbldap_open_connection: StartTLS not supported by LDAP client libraries!\n"));
689                 return LDAP_OPERATIONS_ERROR;
690 #endif
691         }
692
693         DEBUG(2, ("smbldap_open_connection: connection opened\n"));
694         return rc;
695 }
696
697
698 /*******************************************************************
699  a rebind function for authenticated referrals
700  This version takes a void* that we can shove useful stuff in :-)
701 ******************************************************************/
702 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
703 #else
704 static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp, 
705                                    int *methodp, int freeit, void *arg)
706 {
707         struct smbldap_state *ldap_state = arg;
708         
709         /** @TODO Should we be doing something to check what servers we rebind to?
710             Could we get a referral to a machine that we don't want to give our
711             username and password to? */
712         
713         if (freeit) {
714                 SAFE_FREE(*whop);
715                 memset(*credp, '\0', strlen(*credp));
716                 SAFE_FREE(*credp);
717         } else {
718                 DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n", 
719                           ldap_state->bind_dn));
720
721                 *whop = strdup(ldap_state->bind_dn);
722                 if (!*whop) {
723                         return LDAP_NO_MEMORY;
724                 }
725                 *credp = strdup(ldap_state->bind_secret);
726                 if (!*credp) {
727                         SAFE_FREE(*whop);
728                         return LDAP_NO_MEMORY;
729                 }
730                 *methodp = LDAP_AUTH_SIMPLE;
731         }
732
733         GetTimeOfDay(&ldap_state->last_rebind);
734                 
735         return 0;
736 }
737 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
738
739 /*******************************************************************
740  a rebind function for authenticated referrals
741  This version takes a void* that we can shove useful stuff in :-)
742  and actually does the connection.
743 ******************************************************************/
744 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
745 static int rebindproc_connect_with_state (LDAP *ldap_struct, 
746                                           LDAP_CONST char *url, 
747                                           ber_tag_t request,
748                                           ber_int_t msgid, void *arg)
749 {
750         struct smbldap_state *ldap_state = arg;
751         int rc;
752         DEBUG(5,("rebindproc_connect_with_state: Rebinding as \"%s\"\n", 
753                  ldap_state->bind_dn));
754         
755         /** @TODO Should we be doing something to check what servers we rebind to?
756             Could we get a referral to a machine that we don't want to give our
757             username and password to? */
758
759         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
760         
761         GetTimeOfDay(&ldap_state->last_rebind);
762
763         return rc;
764 }
765 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
766
767 /*******************************************************************
768  Add a rebind function for authenticated referrals
769 ******************************************************************/
770 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
771 #else
772 # if LDAP_SET_REBIND_PROC_ARGS == 2
773 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
774                        int *method, int freeit )
775 {
776         struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
777
778         return rebindproc_with_state(ldap_struct, whop, credp,
779                                      method, freeit, ldap_state);
780         
781 }
782 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
783 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
784
785 /*******************************************************************
786  a rebind function for authenticated referrals
787  this also does the connection, but no void*.
788 ******************************************************************/
789 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
790 # if LDAP_SET_REBIND_PROC_ARGS == 2
791 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
792                                ber_int_t msgid)
793 {
794         struct smbldap_state *ldap_state = smbldap_find_state(ld);
795
796         return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid, 
797                                              ldap_state);
798 }
799 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
800 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
801
802 /*******************************************************************
803  connect to the ldap server under system privilege.
804 ******************************************************************/
805 static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_struct)
806 {
807         int rc;
808         char *ldap_dn;
809         char *ldap_secret;
810
811         /* get the password */
812         if (!fetch_ldap_pw(&ldap_dn, &ldap_secret)) {
813                 DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
814                 return LDAP_INVALID_CREDENTIALS;
815         }
816
817         ldap_state->bind_dn = ldap_dn;
818         ldap_state->bind_secret = ldap_secret;
819
820         /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite 
821            (OpenLDAP) doesnt' seem to support it */
822            
823         DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
824                   ldap_state->uri, ldap_dn));
825
826 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
827 # if LDAP_SET_REBIND_PROC_ARGS == 2     
828         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect); 
829 # endif
830 # if LDAP_SET_REBIND_PROC_ARGS == 3     
831         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);  
832 # endif
833 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
834 # if LDAP_SET_REBIND_PROC_ARGS == 2     
835         ldap_set_rebind_proc(ldap_struct, &rebindproc); 
836 # endif
837 # if LDAP_SET_REBIND_PROC_ARGS == 3     
838         ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);  
839 # endif
840 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
841
842         rc = ldap_simple_bind_s(ldap_struct, ldap_dn, ldap_secret);
843
844         if (rc != LDAP_SUCCESS) {
845                 char *ld_error = NULL;
846                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
847                                 &ld_error);
848                 DEBUG(ldap_state->num_failures ? 2 : 0,
849                       ("failed to bind to server with dn= %s Error: %s\n\t%s\n",
850                                ldap_dn ? ldap_dn : "(unknown)", ldap_err2string(rc),
851                                ld_error ? ld_error : "(unknown)"));
852                 SAFE_FREE(ld_error);
853                 ldap_state->num_failures++;
854                 return rc;
855         }
856
857         ldap_state->num_failures = 0;
858
859         DEBUG(3, ("ldap_connect_system: succesful connection to the LDAP server\n"));
860         return rc;
861 }
862
863 /**********************************************************************
864  Connect to LDAP server (called before every ldap operation)
865 *********************************************************************/
866 static int smbldap_open(struct smbldap_state *ldap_state)
867 {
868         int rc;
869         SMB_ASSERT(ldap_state);
870                 
871 #ifndef NO_LDAP_SECURITY
872         if (geteuid() != 0) {
873                 DEBUG(0, ("smbldap_open: cannot access LDAP when not root..\n"));
874                 return  LDAP_INSUFFICIENT_ACCESS;
875         }
876 #endif
877
878         if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time(NULL))) {
879                 struct sockaddr_un addr;
880                 socklen_t len = sizeof(addr);
881                 int sd;
882                 if (ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd) == 0 &&
883                     getpeername(sd, (struct sockaddr *) &addr, &len) < 0) {
884                         /* the other end has died. reopen. */
885                         ldap_unbind_ext(ldap_state->ldap_struct, NULL, NULL);
886                         ldap_state->ldap_struct = NULL;
887                         ldap_state->last_ping = (time_t)0;
888                 } else {
889                         ldap_state->last_ping = time(NULL);
890                 } 
891         }
892
893         if (ldap_state->ldap_struct != NULL) {
894                 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
895                 return LDAP_SUCCESS;
896         }
897
898         if ((rc = smbldap_open_connection(ldap_state))) {
899                 return rc;
900         }
901
902         if ((rc = smbldap_connect_system(ldap_state, ldap_state->ldap_struct))) {
903                 ldap_unbind_ext(ldap_state->ldap_struct, NULL, NULL);
904                 ldap_state->ldap_struct = NULL;
905                 return rc;
906         }
907
908
909         ldap_state->last_ping = time(NULL);
910         ldap_state->pid = sys_getpid();
911         DEBUG(4,("The LDAP server is succesfully connected\n"));
912
913         return LDAP_SUCCESS;
914 }
915
916 /**********************************************************************
917 Disconnect from LDAP server 
918 *********************************************************************/
919 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
920 {
921         if (!ldap_state)
922                 return NT_STATUS_INVALID_PARAMETER;
923                 
924         if (ldap_state->ldap_struct != NULL) {
925                 ldap_unbind_ext(ldap_state->ldap_struct, NULL, NULL);
926                 ldap_state->ldap_struct = NULL;
927         }
928
929         smbldap_delete_state(ldap_state);
930         
931         DEBUG(5,("The connection to the LDAP server was closed\n"));
932         /* maybe free the results here --metze */
933         
934         
935
936         return NT_STATUS_OK;
937 }
938
939 static BOOL got_alarm;
940
941 static void (*old_handler)(int);
942
943 static void gotalarm_sig(int dummy)
944 {
945         got_alarm = True;
946 }
947
948 static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
949                             int *attempts, time_t endtime)
950 {
951         time_t now = time(NULL);
952         int open_rc = LDAP_SERVER_DOWN;
953
954         if (*rc != LDAP_SERVER_DOWN)
955                 goto no_next;
956
957         now = time(NULL);
958
959         if (now >= endtime) {
960                 smbldap_close(ldap_state);
961                 *rc = LDAP_TIMEOUT;
962                 goto no_next;
963         }
964
965         if (*attempts == 0) {
966                 got_alarm = False;
967                 old_handler = CatchSignal(SIGALRM, gotalarm_sig);
968                 alarm(endtime - now);
969
970                 if (ldap_state->pid != sys_getpid())
971                         smbldap_close(ldap_state);
972         }
973
974         while (1) {
975
976                 if (*attempts != 0)
977                         smb_msleep(1000);
978
979                 *attempts += 1;
980
981                 open_rc = smbldap_open(ldap_state);
982
983                 if (open_rc == LDAP_SUCCESS) {
984                         ldap_state->last_use = now;
985                         return True;
986                 }
987
988                 if (got_alarm) {
989                         *rc = LDAP_TIMEOUT;
990                         break;
991                 }
992
993                 if (open_rc != LDAP_SUCCESS) {
994                         DEBUG(1, ("Connection to LDAP server failed for the "
995                                   "%d try!\n", *attempts));
996                 }
997         }
998
999  no_next:
1000         CatchSignal(SIGALRM, old_handler);
1001         alarm(0);
1002         ldap_state->last_use = now;
1003         return False;
1004 }
1005
1006 /*********************************************************************
1007  ********************************************************************/
1008
1009 int smbldap_search(struct smbldap_state *ldap_state, 
1010                    const char *base, int scope, const char *filter, 
1011                    char *attrs[], int attrsonly, 
1012                    LDAPMessage **res)
1013 {
1014         int             rc = LDAP_SERVER_DOWN;
1015         int             attempts = 0;
1016         char           *utf8_filter;
1017         time_t          endtime = time(NULL)+lp_ldap_timeout();
1018
1019         SMB_ASSERT(ldap_state);
1020         
1021         DEBUG(5,("smbldap_search: base => [%s], filter => [%s], scope => [%d]\n",
1022                 base, filter, scope));
1023
1024         if (ldap_state->last_rebind.tv_sec > 0) {
1025                 struct timeval  tval;
1026                 SMB_BIG_INT     tdiff = 0;
1027                 int             sleep_time = 0;
1028
1029                 ZERO_STRUCT(tval);
1030                 GetTimeOfDay(&tval);
1031
1032                 tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
1033                 tdiff /= 1000; /* Convert to milliseconds. */
1034
1035                 sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
1036                 sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
1037
1038                 if (sleep_time > 0) {
1039                         /* we wait for the LDAP replication */
1040                         DEBUG(5,("smbldap_search: waiting %d milliseconds for LDAP replication.\n",sleep_time));
1041                         smb_msleep(sleep_time);
1042                         DEBUG(5,("smbldap_search: go on!\n"));
1043                 }
1044                 ZERO_STRUCT(ldap_state->last_rebind);
1045         }
1046
1047         if (push_utf8_allocate(&utf8_filter, filter) == (size_t)-1) {
1048                 return LDAP_NO_MEMORY;
1049         }
1050
1051         while (another_ldap_try(ldap_state, &rc, &attempts, endtime))
1052                 rc = ldap_search_s(ldap_state->ldap_struct, base, scope, 
1053                                    utf8_filter, attrs, attrsonly, res);
1054         
1055         SAFE_FREE(utf8_filter);
1056         return rc;
1057 }
1058
1059 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1060 {
1061         int             rc = LDAP_SERVER_DOWN;
1062         int             attempts = 0;
1063         char           *utf8_dn;
1064         time_t          endtime = time(NULL)+lp_ldap_timeout();
1065
1066         SMB_ASSERT(ldap_state);
1067
1068         DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1069
1070         if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
1071                 return LDAP_NO_MEMORY;
1072         }
1073
1074         while (another_ldap_try(ldap_state, &rc, &attempts, endtime))
1075                 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1076                 
1077         SAFE_FREE(utf8_dn);
1078         return rc;
1079 }
1080
1081 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1082 {
1083         int             rc = LDAP_SERVER_DOWN;
1084         int             attempts = 0;
1085         char           *utf8_dn;
1086         time_t          endtime = time(NULL)+lp_ldap_timeout();
1087         
1088         SMB_ASSERT(ldap_state);
1089
1090         DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1091
1092         if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
1093                 return LDAP_NO_MEMORY;
1094         }
1095
1096         while (another_ldap_try(ldap_state, &rc, &attempts, endtime))
1097                 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1098         
1099         SAFE_FREE(utf8_dn);
1100         return rc;
1101 }
1102
1103 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1104 {
1105         int             rc = LDAP_SERVER_DOWN;
1106         int             attempts = 0;
1107         char           *utf8_dn;
1108         time_t          endtime = time(NULL)+lp_ldap_timeout();
1109         
1110         SMB_ASSERT(ldap_state);
1111
1112         DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1113
1114         if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
1115                 return LDAP_NO_MEMORY;
1116         }
1117
1118         while (another_ldap_try(ldap_state, &rc, &attempts, endtime))
1119                 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1120         
1121         SAFE_FREE(utf8_dn);
1122         return rc;
1123 }
1124
1125 int smbldap_extended_operation(struct smbldap_state *ldap_state, 
1126                                LDAP_CONST char *reqoid, struct berval *reqdata, 
1127                                LDAPControl **serverctrls, LDAPControl **clientctrls, 
1128                                char **retoidp, struct berval **retdatap)
1129 {
1130         int             rc = LDAP_SERVER_DOWN;
1131         int             attempts = 0;
1132         time_t          endtime = time(NULL)+lp_ldap_timeout();
1133         
1134         if (!ldap_state)
1135                 return (-1);
1136
1137         while (another_ldap_try(ldap_state, &rc, &attempts, endtime))
1138                 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
1139                                                reqdata, serverctrls,
1140                                                clientctrls, retoidp, retdatap);
1141         return rc;
1142 }
1143
1144 /*******************************************************************
1145  run the search by name.
1146 ******************************************************************/
1147 int smbldap_search_suffix (struct smbldap_state *ldap_state, const char *filter, 
1148                            char **search_attr, LDAPMessage ** result)
1149 {
1150         int scope = LDAP_SCOPE_SUBTREE;
1151         int rc;
1152
1153         rc = smbldap_search(ldap_state, lp_ldap_suffix(), scope, filter, search_attr, 0, result);
1154
1155         if (rc != LDAP_SUCCESS) {
1156                 char *ld_error = NULL;
1157                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
1158                                 &ld_error);
1159                 DEBUG(0,("smbldap_search_suffix: Problem during the LDAP search: %s (%s)\n", 
1160                         ld_error?ld_error:"(unknown)", ldap_err2string (rc)));
1161                 SAFE_FREE(ld_error);
1162         }
1163         
1164         return rc;
1165 }
1166
1167 static void smbldap_idle_fn(void **data, time_t *interval, time_t now)
1168 {
1169         struct smbldap_state *state = (struct smbldap_state *)(*data);
1170
1171         if (state->ldap_struct == NULL) {
1172                 DEBUG(10,("ldap connection not connected...\n"));
1173                 return;
1174         }
1175                 
1176         if ((state->last_use+SMBLDAP_IDLE_TIME) > now) {
1177                 DEBUG(10,("ldap connection not idle...\n"));
1178                 return;
1179         }
1180                 
1181         DEBUG(7,("ldap connection idle...closing connection\n"));
1182         smbldap_close(state);
1183 }
1184
1185 /**********************************************************************
1186  Housekeeping
1187  *********************************************************************/
1188
1189 void smbldap_free_struct(struct smbldap_state **ldap_state) 
1190 {
1191         smbldap_close(*ldap_state);
1192         
1193         if ((*ldap_state)->bind_secret) {
1194                 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1195         }
1196
1197         SAFE_FREE((*ldap_state)->bind_dn);
1198         SAFE_FREE((*ldap_state)->bind_secret);
1199
1200         smb_unregister_idle_event((*ldap_state)->event_id);
1201
1202         *ldap_state = NULL;
1203
1204         /* No need to free any further, as it is talloc()ed */
1205 }
1206
1207
1208 /**********************************************************************
1209  Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1210  *********************************************************************/
1211
1212 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, const char *location, struct smbldap_state **smbldap_state) 
1213 {
1214         *smbldap_state = talloc_zero(mem_ctx, sizeof(**smbldap_state));
1215         if (!*smbldap_state) {
1216                 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1217                 return NT_STATUS_NO_MEMORY;
1218         }
1219
1220         if (location) {
1221                 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1222         } else {
1223                 (*smbldap_state)->uri = "ldap://localhost";
1224         }
1225
1226         (*smbldap_state)->event_id =
1227                 smb_register_idle_event(smbldap_idle_fn, (void *)(*smbldap_state),
1228                                         SMBLDAP_IDLE_TIME);
1229
1230         if ((*smbldap_state)->event_id == SMB_EVENT_ID_INVALID) {
1231                 DEBUG(0,("Failed to register LDAP idle event!\n"));
1232                 return NT_STATUS_INVALID_HANDLE;
1233         }
1234
1235         return NT_STATUS_OK;
1236 }
1237
1238 /**********************************************************************
1239  Add the sambaDomain to LDAP, so we don't have to search for this stuff
1240  again.  This is a once-add operation for now.
1241
1242  TODO:  Add other attributes, and allow modification.
1243 *********************************************************************/
1244 static NTSTATUS add_new_domain_info(struct smbldap_state *ldap_state, 
1245                                     const char *domain_name) 
1246 {
1247         fstring sid_string;
1248         fstring algorithmic_rid_base_string;
1249         pstring filter, dn;
1250         LDAPMod **mods = NULL;
1251         int rc;
1252         int ldap_op;
1253         LDAPMessage *result = NULL;
1254         int num_result;
1255         char **attr_list;
1256         uid_t u_low, u_high;
1257         gid_t g_low, g_high;
1258         uint32 rid_low, rid_high;
1259
1260         slprintf (filter, sizeof (filter) - 1, "(&(%s=%s)(objectclass=%s))", 
1261                   get_attr_key2string(dominfo_attr_list, LDAP_ATTR_DOMAIN), 
1262                   domain_name, LDAP_OBJ_DOMINFO);
1263
1264         attr_list = get_attr_list( dominfo_attr_list );
1265         rc = smbldap_search_suffix(ldap_state, filter, attr_list, &result);
1266         free_attr_list( attr_list );
1267
1268         if (rc != LDAP_SUCCESS) {
1269                 return NT_STATUS_UNSUCCESSFUL;
1270         }
1271
1272         num_result = ldap_count_entries(ldap_state->ldap_struct, result);
1273         
1274         if (num_result > 1) {
1275                 DEBUG (0, ("More than domain with that name exists: bailing out!\n"));
1276                 ldap_msgfree(result);
1277                 return NT_STATUS_UNSUCCESSFUL;
1278         }
1279         
1280         /* Check if we need to add an entry */
1281         DEBUG(3,("Adding new domain\n"));
1282         ldap_op = LDAP_MOD_ADD;
1283
1284         pstr_sprintf(dn, "%s=%s,%s", get_attr_key2string(dominfo_attr_list, LDAP_ATTR_DOMAIN),
1285                 domain_name, lp_ldap_suffix());
1286
1287         /* Free original search */
1288         ldap_msgfree(result);
1289
1290         /* make the changes - the entry *must* not already have samba attributes */
1291         smbldap_set_mod(&mods, LDAP_MOD_ADD, get_attr_key2string(dominfo_attr_list, LDAP_ATTR_DOMAIN), 
1292                 domain_name);
1293
1294         /* If we don't have an entry, then ask secrets.tdb for what it thinks.  
1295            It may choose to make it up */
1296
1297         sid_to_string(sid_string, get_global_sam_sid());
1298         smbldap_set_mod(&mods, LDAP_MOD_ADD, get_attr_key2string(dominfo_attr_list, LDAP_ATTR_DOM_SID), sid_string);
1299
1300         slprintf(algorithmic_rid_base_string, sizeof(algorithmic_rid_base_string) - 1, "%i", algorithmic_rid_base());
1301         smbldap_set_mod(&mods, LDAP_MOD_ADD, get_attr_key2string(dominfo_attr_list, LDAP_ATTR_ALGORITHMIC_RID_BASE), 
1302                         algorithmic_rid_base_string);
1303         smbldap_set_mod(&mods, LDAP_MOD_ADD, "objectclass", LDAP_OBJ_DOMINFO);
1304         
1305         /* add the sambaNext[User|Group]Rid attributes if the idmap ranges are set.
1306            TODO: fix all the places where the line between idmap and normal operations
1307            needed by smbd gets fuzzy   --jerry 2003-08-11                              */
1308         
1309         if ( lp_idmap_uid(&u_low, &u_high) && lp_idmap_gid(&g_low, &g_high)
1310                 && get_free_rid_range(&rid_low, &rid_high) ) 
1311         {
1312                 fstring rid_str;
1313                 
1314                 fstr_sprintf( rid_str, "%i", rid_high|USER_RID_TYPE );
1315                 DEBUG(10,("setting next available user rid [%s]\n", rid_str));
1316                 smbldap_set_mod(&mods, LDAP_MOD_ADD, 
1317                         get_attr_key2string(dominfo_attr_list, LDAP_ATTR_NEXT_USERRID), 
1318                         rid_str);
1319                         
1320                 fstr_sprintf( rid_str, "%i", rid_high|GROUP_RID_TYPE );
1321                 DEBUG(10,("setting next available group rid [%s]\n", rid_str));
1322                 smbldap_set_mod(&mods, LDAP_MOD_ADD, 
1323                         get_attr_key2string(dominfo_attr_list, LDAP_ATTR_NEXT_GROUPRID), 
1324                         rid_str);
1325                 
1326         }
1327
1328
1329         switch(ldap_op)
1330         {
1331         case LDAP_MOD_ADD: 
1332                 rc = smbldap_add(ldap_state, dn, mods);
1333                 break;
1334         case LDAP_MOD_REPLACE: 
1335                 rc = smbldap_modify(ldap_state, dn, mods);
1336                 break;
1337         default:        
1338                 DEBUG(0,("Wrong LDAP operation type: %d!\n", ldap_op));
1339                 return NT_STATUS_INVALID_PARAMETER;
1340         }
1341         
1342         if (rc!=LDAP_SUCCESS) {
1343                 char *ld_error = NULL;
1344                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING, &ld_error);
1345                 DEBUG(1,("failed to %s domain dn= %s with: %s\n\t%s\n",
1346                        ldap_op == LDAP_MOD_ADD ? "add" : "modify",
1347                        dn, ldap_err2string(rc),
1348                        ld_error?ld_error:"unknown"));
1349                 SAFE_FREE(ld_error);
1350
1351                 ldap_mods_free(mods, True);
1352                 return NT_STATUS_UNSUCCESSFUL;
1353         }
1354
1355         DEBUG(2,("added: domain = %s in the LDAP database\n", domain_name));
1356         ldap_mods_free(mods, True);
1357         return NT_STATUS_OK;
1358 }
1359
1360 /**********************************************************************
1361 Search for the domain info entry
1362 *********************************************************************/
1363 NTSTATUS smbldap_search_domain_info(struct smbldap_state *ldap_state,
1364                                     LDAPMessage ** result, const char *domain_name,
1365                                     BOOL try_add)
1366 {
1367         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
1368         pstring filter;
1369         int rc;
1370         char **attr_list;
1371         int count;
1372
1373         pstr_sprintf(filter, "(&(objectClass=%s)(%s=%s))",
1374                 LDAP_OBJ_DOMINFO,
1375                 get_attr_key2string(dominfo_attr_list, LDAP_ATTR_DOMAIN), 
1376                 domain_name);
1377
1378         DEBUG(2, ("Searching for:[%s]\n", filter));
1379
1380
1381         attr_list = get_attr_list( dominfo_attr_list );
1382         rc = smbldap_search_suffix(ldap_state, filter, attr_list , result);
1383         free_attr_list( attr_list );
1384
1385         if (rc != LDAP_SUCCESS) {
1386                 DEBUG(2,("Problem during LDAPsearch: %s\n", ldap_err2string (rc)));
1387                 DEBUG(2,("Query was: %s, %s\n", lp_ldap_suffix(), filter));
1388         } else if (ldap_count_entries(ldap_state->ldap_struct, *result) < 1) {
1389                 DEBUG(3, ("Got no domain info entries for domain\n"));
1390                 ldap_msgfree(*result);
1391                 *result = NULL;
1392                 if (try_add && NT_STATUS_IS_OK(ret = add_new_domain_info(ldap_state, domain_name))) {
1393                         return smbldap_search_domain_info(ldap_state, result, domain_name, False);
1394                 } 
1395                 else {
1396                         DEBUG(0, ("Adding domain info for %s failed with %s\n", 
1397                                 domain_name, nt_errstr(ret)));
1398                         return ret;
1399                 }
1400         } else if ((count = ldap_count_entries(ldap_state->ldap_struct, *result)) > 1) {
1401                 DEBUG(0, ("Got too many (%d) domain info entries for domain %s\n",
1402                           count, domain_name));
1403                 ldap_msgfree(*result);
1404                 *result = NULL;
1405                 return ret;
1406         } else {
1407                 return NT_STATUS_OK;
1408         }
1409         
1410         return ret;
1411 }
1412
1413 /*******************************************************************
1414  Return a copy of the DN for a LDAPMessage. Convert from utf8 to CH_UNIX.
1415 ********************************************************************/
1416
1417 char *smbldap_get_dn(LDAP *ld, LDAPMessage *entry)
1418 {
1419         char *utf8_dn, *unix_dn;
1420
1421         utf8_dn = ldap_get_dn(ld, entry);
1422         if (!utf8_dn) {
1423                 DEBUG (5, ("smbldap_get_dn: ldap_get_dn failed\n"));
1424                 return NULL;
1425         }
1426         if (pull_utf8_allocate(&unix_dn, utf8_dn) == (size_t)-1) {
1427                 DEBUG (0, ("smbldap_get_dn: String conversion failure utf8 [%s]\n", utf8_dn));
1428                 return NULL;
1429         }
1430         ldap_memfree(utf8_dn);
1431         return unix_dn;
1432 }
1433