source3/lib/smbldap.c

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