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, see <http://www.gnu.org/licenses/>.
  22
  23 */
  24
  25 #include "includes.h"
  26 #include "smbldap.h"
  27
  28 #ifndef LDAP_OPT_SUCCESS
  29 #define LDAP_OPT_SUCCESS 0
  30 #endif
  31
  32 /* Try not to hit the up or down server forever */
  33
  34 #define SMBLDAP_DONT_PING_TIME 10       /* ping only all 10 seconds */
  35 #define SMBLDAP_NUM_RETRIES 8           /* retry only 8 times */
  36
  37 #define SMBLDAP_IDLE_TIME 150           /* After 2.5 minutes disconnect */
  38
  39
  40 /* attributes used by Samba 2.2 */
  41
  42 ATTRIB_MAP_ENTRY attrib_map_v22[] = {
  43         { LDAP_ATTR_UID,                "uid"           },
  44         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
  45         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
  46         { LDAP_ATTR_UNIX_HOME,          "homeDirectory" },
  47         { LDAP_ATTR_PWD_LAST_SET,       "pwdLastSet"    },
  48         { LDAP_ATTR_PWD_CAN_CHANGE,     "pwdCanChange"  },
  49         { LDAP_ATTR_PWD_MUST_CHANGE,    "pwdMustChange" },
  50         { LDAP_ATTR_LOGON_TIME,         "logonTime"     },
  51         { LDAP_ATTR_LOGOFF_TIME,        "logoffTime"    },
  52         { LDAP_ATTR_KICKOFF_TIME,       "kickoffTime"   },
  53         { LDAP_ATTR_CN,                 "cn"            },
  54         { LDAP_ATTR_SN,                 "sn"            },
  55         { LDAP_ATTR_DISPLAY_NAME,       "displayName"   },
  56         { LDAP_ATTR_HOME_PATH,          "smbHome"       },
  57         { LDAP_ATTR_HOME_DRIVE,         "homeDrive"     },
  58         { LDAP_ATTR_LOGON_SCRIPT,       "scriptPath"    },
  59         { LDAP_ATTR_PROFILE_PATH,       "profilePath"   },
  60         { LDAP_ATTR_DESC,               "description"   },
  61         { LDAP_ATTR_USER_WKS,           "userWorkstations"},
  62         { LDAP_ATTR_USER_RID,           "rid"           },
  63         { LDAP_ATTR_PRIMARY_GROUP_RID,  "primaryGroupID"},
  64         { LDAP_ATTR_LMPW,               "lmPassword"    },
  65         { LDAP_ATTR_NTPW,               "ntPassword"    },
  66         { LDAP_ATTR_DOMAIN,             "domain"        },
  67         { LDAP_ATTR_OBJCLASS,           "objectClass"   },
  68         { LDAP_ATTR_ACB_INFO,           "acctFlags"     },
  69         { LDAP_ATTR_MOD_TIMESTAMP,      "modifyTimestamp"       },
  70         { LDAP_ATTR_LIST_END,           NULL            }
  71 };
  72
  73 ATTRIB_MAP_ENTRY attrib_map_to_delete_v22[] = {
  74         { LDAP_ATTR_PWD_LAST_SET,       "pwdLastSet"    },
  75         { LDAP_ATTR_PWD_CAN_CHANGE,     "pwdCanChange"  },
  76         { LDAP_ATTR_PWD_MUST_CHANGE,    "pwdMustChange" },
  77         { LDAP_ATTR_LOGON_TIME,         "logonTime"     },
  78         { LDAP_ATTR_LOGOFF_TIME,        "logoffTime"    },
  79         { LDAP_ATTR_KICKOFF_TIME,       "kickoffTime"   },
  80         { LDAP_ATTR_DISPLAY_NAME,       "displayName"   },
  81         { LDAP_ATTR_HOME_PATH,          "smbHome"       },
  82         { LDAP_ATTR_HOME_DRIVE,         "homeDrives"    },
  83         { LDAP_ATTR_LOGON_SCRIPT,       "scriptPath"    },
  84         { LDAP_ATTR_PROFILE_PATH,       "profilePath"   },
  85         { LDAP_ATTR_USER_WKS,           "userWorkstations"},
  86         { LDAP_ATTR_USER_RID,           "rid"           },
  87         { LDAP_ATTR_PRIMARY_GROUP_RID,  "primaryGroupID"},
  88         { LDAP_ATTR_LMPW,               "lmPassword"    },
  89         { LDAP_ATTR_NTPW,               "ntPassword"    },
  90         { LDAP_ATTR_DOMAIN,             "domain"        },
  91         { LDAP_ATTR_ACB_INFO,           "acctFlags"     },
  92         { LDAP_ATTR_LIST_END,           NULL            }
  93 };
  94
  95 /* attributes used by Samba 3.0's sambaSamAccount */
  96
  97 ATTRIB_MAP_ENTRY attrib_map_v30[] = {
  98         { LDAP_ATTR_UID,                "uid"                   },
  99         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 100         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 101         { LDAP_ATTR_UNIX_HOME,          "homeDirectory"         },
 102         { LDAP_ATTR_PWD_LAST_SET,       "sambaPwdLastSet"       },
 103         { LDAP_ATTR_PWD_CAN_CHANGE,     "sambaPwdCanChange"     },
 104         { LDAP_ATTR_PWD_MUST_CHANGE,    "sambaPwdMustChange"    },
 105         { LDAP_ATTR_LOGON_TIME,         "sambaLogonTime"        },
 106         { LDAP_ATTR_LOGOFF_TIME,        "sambaLogoffTime"       },
 107         { LDAP_ATTR_KICKOFF_TIME,       "sambaKickoffTime"      },
 108         { LDAP_ATTR_CN,                 "cn"                    },
 109         { LDAP_ATTR_SN,                 "sn"                    },
 110         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 111         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
 112         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
 113         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
 114         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
 115         { LDAP_ATTR_DESC,               "description"           },
 116         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
 117         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
 118         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
 119         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
 120         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
 121         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 122         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 123         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
 124         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
 125         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
 126         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
 127         { LDAP_ATTR_PWD_HISTORY,        "sambaPasswordHistory"  },
 128         { LDAP_ATTR_MOD_TIMESTAMP,      "modifyTimestamp"       },
 129         { LDAP_ATTR_LOGON_HOURS,        "sambaLogonHours"       },
 130         { LDAP_ATTR_LIST_END,           NULL                    }
 131 };
 132
 133 ATTRIB_MAP_ENTRY attrib_map_to_delete_v30[] = {
 134         { LDAP_ATTR_PWD_LAST_SET,       "sambaPwdLastSet"       },
 135         { LDAP_ATTR_PWD_CAN_CHANGE,     "sambaPwdCanChange"     },
 136         { LDAP_ATTR_PWD_MUST_CHANGE,    "sambaPwdMustChange"    },
 137         { LDAP_ATTR_LOGON_TIME,         "sambaLogonTime"        },
 138         { LDAP_ATTR_LOGOFF_TIME,        "sambaLogoffTime"       },
 139         { LDAP_ATTR_KICKOFF_TIME,       "sambaKickoffTime"      },
 140         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 141         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
 142         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
 143         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
 144         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
 145         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
 146         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
 147         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
 148         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
 149         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
 150         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 151         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
 152         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
 153         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
 154         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
 155         { LDAP_ATTR_PWD_HISTORY,        "sambaPasswordHistory"  },
 156         { LDAP_ATTR_LOGON_HOURS,        "sambaLogonHours"       },
 157         { LDAP_ATTR_LIST_END,           NULL                    }
 158 };
 159
 160 /* attributes used for allocating RIDs */
 161
 162 ATTRIB_MAP_ENTRY dominfo_attr_list[] = {
 163         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 164         { LDAP_ATTR_NEXT_RID,           "sambaNextRid"          },
 165         { LDAP_ATTR_NEXT_USERRID,       "sambaNextUserRid"      },
 166         { LDAP_ATTR_NEXT_GROUPRID,      "sambaNextGroupRid"     },
 167         { LDAP_ATTR_DOM_SID,            LDAP_ATTRIBUTE_SID      },
 168         { LDAP_ATTR_ALGORITHMIC_RID_BASE,"sambaAlgorithmicRidBase"},
 169         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 170         { LDAP_ATTR_LIST_END,           NULL                    },
 171 };
 172
 173 /* Samba 3.0 group mapping attributes */
 174
 175 ATTRIB_MAP_ENTRY groupmap_attr_list[] = {
 176         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 177         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
 178         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
 179         { LDAP_ATTR_SID_LIST,           "sambaSIDList"          },
 180         { LDAP_ATTR_DESC,               "description"           },
 181         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 182         { LDAP_ATTR_CN,                 "cn"                    },
 183         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 184         { LDAP_ATTR_LIST_END,           NULL                    }
 185 };
 186
 187 ATTRIB_MAP_ENTRY groupmap_attr_list_to_delete[] = {
 188         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
 189         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
 190         { LDAP_ATTR_DESC,               "description"           },
 191         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 192         { LDAP_ATTR_SID_LIST,           "sambaSIDList"          },
 193         { LDAP_ATTR_LIST_END,           NULL                    }
 194 };
 195
 196 /* idmap_ldap sambaUnixIdPool */
 197
 198 ATTRIB_MAP_ENTRY idpool_attr_list[] = {
 199         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 200         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 201         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 202         { LDAP_ATTR_LIST_END,           NULL                    }
 203 };
 204
 205 ATTRIB_MAP_ENTRY sidmap_attr_list[] = {
 206         { LDAP_ATTR_SID,                LDAP_ATTRIBUTE_SID      },
 207         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 208         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 209         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 210         { LDAP_ATTR_LIST_END,           NULL                    }
 211 };
 212
 213 /**********************************************************************
 214  perform a simple table lookup and return the attribute name
 215  **********************************************************************/
 216
 217  const char* get_attr_key2string( ATTRIB_MAP_ENTRY table[], int key )
 218 {
 219         int i = 0;
 220
 221         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
 222                 if ( table[i].attrib == key )
 223                         return table[i].name;
 224                 i++;
 225         }
 226
 227         return NULL;
 228 }
 229
 230
 231 /**********************************************************************
 232  Return the list of attribute names from a mapping table
 233  **********************************************************************/
 234
 235  const char** get_attr_list( TALLOC_CTX *mem_ctx, ATTRIB_MAP_ENTRY table[] )
 236 {
 237         const char **names;
 238         int i = 0;
 239
 240         while ( table[i].attrib != LDAP_ATTR_LIST_END )
 241                 i++;
 242         i++;
 243
 244         names = TALLOC_ARRAY( mem_ctx, const char*, i );
 245         if ( !names ) {
 246                 DEBUG(0,("get_attr_list: out of memory\n"));
 247                 return NULL;
 248         }
 249
 250         i = 0;
 251         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
 252                 names[i] = talloc_strdup( names, table[i].name );
 253                 i++;
 254         }
 255         names[i] = NULL;
 256
 257         return names;
 258 }
 259
 260 /*******************************************************************
 261  Search an attribute and return the first value found.
 262 ******************************************************************/
 263
 264  bool smbldap_get_single_attribute (LDAP * ldap_struct, LDAPMessage * entry,
 265                                     const char *attribute, char *value,
 266                                     int max_len)
 267 {
 268         char **values;
 269
 270         if ( !attribute )
 271                 return False;
 272
 273         value[0] = '\0';
 274
 275         if ((values = ldap_get_values (ldap_struct, entry, attribute)) == NULL) {
 276                 DEBUG (10, ("smbldap_get_single_attribute: [%s] = [<does not exist>]\n", attribute));
 277
 278                 return False;
 279         }
 280
 281         if (convert_string(CH_UTF8, CH_UNIX,values[0], -1, value, max_len, False) == (size_t)-1) {
 282                 DEBUG(1, ("smbldap_get_single_attribute: string conversion of [%s] = [%s] failed!\n",
 283                           attribute, values[0]));
 284                 ldap_value_free(values);
 285                 return False;
 286         }
 287
 288         ldap_value_free(values);
 289 #ifdef DEBUG_PASSWORDS
 290         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n", attribute, value));
 291 #endif
 292         return True;
 293 }
 294
 295  char * smbldap_talloc_single_attribute(LDAP *ldap_struct, LDAPMessage *entry,
 296                                         const char *attribute,
 297                                         TALLOC_CTX *mem_ctx)
 298 {
 299         char **values;
 300         char *result;
 301         size_t converted_size;
 302
 303         if (attribute == NULL) {
 304                 return NULL;
 305         }
 306
 307         values = ldap_get_values(ldap_struct, entry, attribute);
 308
 309         if (values == NULL) {
 310                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 311                 return NULL;
 312         }
 313
 314         if (ldap_count_values(values) != 1) {
 315                 DEBUG(10, ("attribute %s has %d values, expected only one\n",
 316                            attribute, ldap_count_values(values)));
 317                 ldap_value_free(values);
 318                 return NULL;
 319         }
 320
 321         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
 322                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 323                 ldap_value_free(values);
 324                 return NULL;
 325         }
 326
 327         ldap_value_free(values);
 328
 329 #ifdef DEBUG_PASSWORDS
 330         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
 331                      attribute, result));
 332 #endif
 333         return result;
 334 }
 335
 336  char * smbldap_talloc_first_attribute(LDAP *ldap_struct, LDAPMessage *entry,
 337                                        const char *attribute,
 338                                        TALLOC_CTX *mem_ctx)
 339 {
 340         char **values;
 341         char *result;
 342         size_t converted_size;
 343
 344         if (attribute == NULL) {
 345                 return NULL;
 346         }
 347
 348         values = ldap_get_values(ldap_struct, entry, attribute);
 349
 350         if (values == NULL) {
 351                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 352                 return NULL;
 353         }
 354
 355         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
 356                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 357                 ldap_value_free(values);
 358                 return NULL;
 359         }
 360
 361         ldap_value_free(values);
 362
 363 #ifdef DEBUG_PASSWORDS
 364         DEBUG (100, ("smbldap_get_first_attribute: [%s] = [%s]\n",
 365                      attribute, result));
 366 #endif
 367         return result;
 368 }
 369
 370  char * smbldap_talloc_smallest_attribute(LDAP *ldap_struct, LDAPMessage *entry,
 371                                           const char *attribute,
 372                                           TALLOC_CTX *mem_ctx)
 373 {
 374         char **values;
 375         char *result;
 376         size_t converted_size;
 377         int i, num_values;
 378
 379         if (attribute == NULL) {
 380                 return NULL;
 381         }
 382
 383         values = ldap_get_values(ldap_struct, entry, attribute);
 384
 385         if (values == NULL) {
 386                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 387                 return NULL;
 388         }
 389
 390         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
 391                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 392                 ldap_value_free(values);
 393                 return NULL;
 394         }
 395
 396         num_values = ldap_count_values(values);
 397
 398         for (i=1; i<num_values; i++) {
 399                 char *tmp;
 400
 401                 if (!pull_utf8_talloc(mem_ctx, &tmp, values[i],
 402                                       &converted_size)) {
 403                         DEBUG(10, ("pull_utf8_talloc failed\n"));
 404                         TALLOC_FREE(result);
 405                         ldap_value_free(values);
 406                         return NULL;
 407                 }
 408
 409                 if (StrCaseCmp(tmp, result) < 0) {
 410                         TALLOC_FREE(result);
 411                         result = tmp;
 412                 } else {
 413                         TALLOC_FREE(tmp);
 414                 }
 415         }
 416
 417         ldap_value_free(values);
 418
 419 #ifdef DEBUG_PASSWORDS
 420         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
 421                      attribute, result));
 422 #endif
 423         return result;
 424 }
 425
 426  bool smbldap_talloc_single_blob(TALLOC_CTX *mem_ctx, LDAP *ld,
 427                                  LDAPMessage *msg, const char *attrib,
 428                                  DATA_BLOB *blob)
 429 {
 430         struct berval **values;
 431
 432         values = ldap_get_values_len(ld, msg, attrib);
 433         if (!values) {
 434                 return false;
 435         }
 436
 437         if (ldap_count_values_len(values) != 1) {
 438                 DEBUG(10, ("Expected one value for %s, got %d\n", attrib,
 439                            ldap_count_values_len(values)));
 440                 return false;
 441         }
 442
 443         *blob = data_blob_talloc(mem_ctx, values[0]->bv_val,
 444                                  values[0]->bv_len);
 445         ldap_value_free_len(values);
 446
 447         return (blob->data != NULL);
 448 }
 449
 450  bool smbldap_pull_sid(LDAP *ld, LDAPMessage *msg, const char *attrib,
 451                        struct dom_sid *sid)
 452 {
 453         DATA_BLOB blob;
 454         bool ret;
 455
 456         if (!smbldap_talloc_single_blob(talloc_tos(), ld, msg, attrib,
 457                                         &blob)) {
 458                 return false;
 459         }
 460         ret = sid_parse((char *)blob.data, blob.length, sid);
 461         TALLOC_FREE(blob.data);
 462         return ret;
 463 }
 464
 465  static int ldapmsg_destructor(LDAPMessage **result) {
 466         ldap_msgfree(*result);
 467         return 0;
 468 }
 469
 470  void talloc_autofree_ldapmsg(TALLOC_CTX *mem_ctx, LDAPMessage *result)
 471 {
 472         LDAPMessage **handle;
 473
 474         if (result == NULL) {
 475                 return;
 476         }
 477
 478         handle = TALLOC_P(mem_ctx, LDAPMessage *);
 479         SMB_ASSERT(handle != NULL);
 480
 481         *handle = result;
 482         talloc_set_destructor(handle, ldapmsg_destructor);
 483 }
 484
 485  static int ldapmod_destructor(LDAPMod ***mod) {
 486         ldap_mods_free(*mod, True);
 487         return 0;
 488 }
 489
 490  void talloc_autofree_ldapmod(TALLOC_CTX *mem_ctx, LDAPMod **mod)
 491 {
 492         LDAPMod ***handle;
 493
 494         if (mod == NULL) {
 495                 return;
 496         }
 497
 498         handle = TALLOC_P(mem_ctx, LDAPMod **);
 499         SMB_ASSERT(handle != NULL);
 500
 501         *handle = mod;
 502         talloc_set_destructor(handle, ldapmod_destructor);
 503 }
 504
 505 /************************************************************************
 506  Routine to manage the LDAPMod structure array
 507  manage memory used by the array, by each struct, and values
 508  ***********************************************************************/
 509
 510  void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
 511 {
 512         LDAPMod **mods;
 513         int i;
 514         int j;
 515
 516         mods = *modlist;
 517
 518         /* sanity checks on the mod values */
 519
 520         if (attribute == NULL || *attribute == '\0') {
 521                 return;
 522         }
 523
 524 #if 0   /* commented out after discussion with abartlet.  Do not reenable.
 525            left here so other do not re-add similar code   --jerry */
 526         if (value == NULL || *value == '\0')
 527                 return;
 528 #endif
 529
 530         if (mods == NULL) {
 531                 mods = SMB_MALLOC_P(LDAPMod *);
 532                 if (mods == NULL) {
 533                         smb_panic("smbldap_set_mod: out of memory!");
 534                         /* notreached. */
 535                 }
 536                 mods[0] = NULL;
 537         }
 538
 539         for (i = 0; mods[i] != NULL; ++i) {
 540                 if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
 541                         break;
 542         }
 543
 544         if (mods[i] == NULL) {
 545                 mods = SMB_REALLOC_ARRAY (mods, LDAPMod *, i + 2);
 546                 if (mods == NULL) {
 547                         smb_panic("smbldap_set_mod: out of memory!");
 548                         /* notreached. */
 549                 }
 550                 mods[i] = SMB_MALLOC_P(LDAPMod);
 551                 if (mods[i] == NULL) {
 552                         smb_panic("smbldap_set_mod: out of memory!");
 553                         /* notreached. */
 554                 }
 555                 mods[i]->mod_op = modop;
 556                 mods[i]->mod_values = NULL;
 557                 mods[i]->mod_type = SMB_STRDUP(attribute);
 558                 mods[i + 1] = NULL;
 559         }
 560
 561         if (value != NULL) {
 562                 char *utf8_value = NULL;
 563                 size_t converted_size;
 564
 565                 j = 0;
 566                 if (mods[i]->mod_values != NULL) {
 567                         for (; mods[i]->mod_values[j] != NULL; j++);
 568                 }
 569                 mods[i]->mod_values = SMB_REALLOC_ARRAY(mods[i]->mod_values, char *, j + 2);
 570
 571                 if (mods[i]->mod_values == NULL) {
 572                         smb_panic("smbldap_set_mod: out of memory!");
 573                         /* notreached. */
 574                 }
 575
 576                 if (!push_utf8_talloc(talloc_tos(), &utf8_value, value, &converted_size)) {
 577                         smb_panic("smbldap_set_mod: String conversion failure!");
 578                         /* notreached. */
 579                 }
 580
 581                 mods[i]->mod_values[j] = SMB_STRDUP(utf8_value);
 582                 TALLOC_FREE(utf8_value);
 583                 SMB_ASSERT(mods[i]->mod_values[j] != NULL);
 584
 585                 mods[i]->mod_values[j + 1] = NULL;
 586         }
 587         *modlist = mods;
 588 }
 589
 590 /**********************************************************************
 591   Set attribute to newval in LDAP, regardless of what value the
 592   attribute had in LDAP before.
 593 *********************************************************************/
 594
 595  void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
 596                       LDAPMod ***mods,
 597                       const char *attribute, const char *newval)
 598 {
 599         char oldval[2048]; /* current largest allowed value is mungeddial */
 600         bool existed;
 601
 602         if (attribute == NULL) {
 603                 /* This can actually happen for ldapsam_compat where we for
 604                  * example don't have a password history */
 605                 return;
 606         }
 607
 608         if (existing != NULL) {
 609                 existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
 610         } else {
 611                 existed = False;
 612                 *oldval = '\0';
 613         }
 614
 615         /* all of our string attributes are case insensitive */
 616
 617         if (existed && newval && (StrCaseCmp(oldval, newval) == 0)) {
 618
 619                 /* Believe it or not, but LDAP will deny a delete and
 620                    an add at the same time if the values are the
 621                    same... */
 622                 DEBUG(10,("smbldap_make_mod: attribute |%s| not changed.\n", attribute));
 623                 return;
 624         }
 625
 626         if (existed) {
 627                 /* There has been no value before, so don't delete it.
 628                  * Here's a possible race: We might end up with
 629                  * duplicate attributes */
 630                 /* By deleting exactly the value we found in the entry this
 631                  * should be race-free in the sense that the LDAP-Server will
 632                  * deny the complete operation if somebody changed the
 633                  * attribute behind our back. */
 634                 /* This will also allow modifying single valued attributes
 635                  * in Novell NDS. In NDS you have to first remove attribute and then
 636                  * you could add new value */
 637
 638                 DEBUG(10,("smbldap_make_mod: deleting attribute |%s| values |%s|\n", attribute, oldval));
 639                 smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
 640         }
 641
 642         /* Regardless of the real operation (add or modify)
 643            we add the new value here. We rely on deleting
 644            the old value, should it exist. */
 645
 646         if ((newval != NULL) && (strlen(newval) > 0)) {
 647                 DEBUG(10,("smbldap_make_mod: adding attribute |%s| value |%s|\n", attribute, newval));
 648                 smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
 649         }
 650 }
 651
 652 /**********************************************************************
 653  Some varients of the LDAP rebind code do not pass in the third 'arg'
 654  pointer to a void*, so we try and work around it by assuming that the
 655  value of the 'LDAP *' pointer is the same as the one we had passed in
 656  **********************************************************************/
 657
 658 struct smbldap_state_lookup {
 659         LDAP *ld;
 660         struct smbldap_state *smbldap_state;
 661         struct smbldap_state_lookup *prev, *next;
 662 };
 663
 664 static struct smbldap_state_lookup *smbldap_state_lookup_list;
 665
 666 static struct smbldap_state *smbldap_find_state(LDAP *ld)
 667 {
 668         struct smbldap_state_lookup *t;
 669
 670         for (t = smbldap_state_lookup_list; t; t = t->next) {
 671                 if (t->ld == ld) {
 672                         return t->smbldap_state;
 673                 }
 674         }
 675         return NULL;
 676 }
 677
 678 static void smbldap_delete_state(struct smbldap_state *smbldap_state)
 679 {
 680         struct smbldap_state_lookup *t;
 681
 682         for (t = smbldap_state_lookup_list; t; t = t->next) {
 683                 if (t->smbldap_state == smbldap_state) {
 684                         DLIST_REMOVE(smbldap_state_lookup_list, t);
 685                         SAFE_FREE(t);
 686                         return;
 687                 }
 688         }
 689 }
 690
 691 static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state)
 692 {
 693         struct smbldap_state *tmp_ldap_state;
 694         struct smbldap_state_lookup *t;
 695
 696         if ((tmp_ldap_state = smbldap_find_state(ld))) {
 697                 SMB_ASSERT(tmp_ldap_state == smbldap_state);
 698                 return;
 699         }
 700
 701         t = SMB_XMALLOC_P(struct smbldap_state_lookup);
 702         ZERO_STRUCTP(t);
 703
 704         DLIST_ADD_END(smbldap_state_lookup_list, t, struct smbldap_state_lookup *);
 705         t->ld = ld;
 706         t->smbldap_state = smbldap_state;
 707 }
 708
 709 /********************************************************************
 710  start TLS on an existing LDAP connection
 711 *******************************************************************/
 712
 713 int smb_ldap_start_tls(LDAP *ldap_struct, int version)
 714 {
 715 #ifdef LDAP_OPT_X_TLS
 716         int rc;
 717 #endif
 718
 719         if (lp_ldap_ssl() != LDAP_SSL_START_TLS) {
 720                 return LDAP_SUCCESS;
 721         }
 722
 723 #ifdef LDAP_OPT_X_TLS
 724         if (version != LDAP_VERSION3) {
 725                 DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
 726                 return LDAP_OPERATIONS_ERROR;
 727         }
 728
 729         if ((rc = ldap_start_tls_s (ldap_struct, NULL, NULL)) != LDAP_SUCCESS)  {
 730                 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
 731                          ldap_err2string(rc)));
 732                 return rc;
 733         }
 734
 735         DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
 736         return LDAP_SUCCESS;
 737 #else
 738         DEBUG(0,("StartTLS not supported by LDAP client libraries!\n"));
 739         return LDAP_OPERATIONS_ERROR;
 740 #endif
 741 }
 742
 743 /********************************************************************
 744  setup a connection to the LDAP server based on a uri
 745 *******************************************************************/
 746
 747 int smb_ldap_setup_conn(LDAP **ldap_struct, const char *uri)
 748 {
 749         int rc;
 750
 751         DEBUG(10, ("smb_ldap_setup_connection: %s\n", uri));
 752
 753 #ifdef HAVE_LDAP_INITIALIZE
 754
 755         rc = ldap_initialize(ldap_struct, uri);
 756         if (rc) {
 757                 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
 758                 return rc;
 759         }
 760
 761         if (lp_ldap_follow_referral() != Auto) {
 762                 rc = ldap_set_option(*ldap_struct, LDAP_OPT_REFERRALS,
 763                      lp_ldap_follow_referral() ? LDAP_OPT_ON : LDAP_OPT_OFF);
 764                 if (rc != LDAP_SUCCESS)
 765                         DEBUG(0, ("Failed to set LDAP_OPT_REFERRALS: %s\n",
 766                                 ldap_err2string(rc)));
 767         }
 768
 769         return LDAP_SUCCESS;
 770 #else
 771
 772         /* Parse the string manually */
 773
 774         {
 775                 int port = 0;
 776                 fstring protocol;
 777                 fstring host;
 778                 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
 779
 780
 781                 /* skip leading "URL:" (if any) */
 782                 if ( strnequal( uri, "URL:", 4 ) ) {
 783                         uri += 4;
 784                 }
 785
 786                 sscanf(uri, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
 787
 788                 if (port == 0) {
 789                         if (strequal(protocol, "ldap")) {
 790                                 port = LDAP_PORT;
 791                         } else if (strequal(protocol, "ldaps")) {
 792                                 port = LDAPS_PORT;
 793                         } else {
 794                                 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
 795                         }
 796                 }
 797
 798                 if ((*ldap_struct = ldap_init(host, port)) == NULL)     {
 799                         DEBUG(0, ("ldap_init failed !\n"));
 800                         return LDAP_OPERATIONS_ERROR;
 801                 }
 802
 803                 if (strequal(protocol, "ldaps")) {
 804 #ifdef LDAP_OPT_X_TLS
 805                         int tls = LDAP_OPT_X_TLS_HARD;
 806                         if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
 807                         {
 808                                 DEBUG(0, ("Failed to setup a TLS session\n"));
 809                         }
 810
 811                         DEBUG(3,("LDAPS option set...!\n"));
 812 #else
 813                         DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
 814                         return LDAP_OPERATIONS_ERROR;
 815 #endif /* LDAP_OPT_X_TLS */
 816                 }
 817         }
 818 #endif /* HAVE_LDAP_INITIALIZE */
 819
 820         /* now set connection timeout */
 821 #ifdef LDAP_X_OPT_CONNECT_TIMEOUT /* Netscape */
 822         {
 823                 int ct = lp_ldap_connection_timeout()*1000;
 824                 rc = ldap_set_option(*ldap_struct, LDAP_X_OPT_CONNECT_TIMEOUT, &ct);
 825                 if (rc != LDAP_SUCCESS) {
 826                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
 827                                 ct, ldap_err2string(rc)));
 828                 }
 829         }
 830 #elif defined (LDAP_OPT_NETWORK_TIMEOUT) /* OpenLDAP */
 831         {
 832                 struct timeval ct;
 833                 ct.tv_usec = 0;
 834                 ct.tv_sec = lp_ldap_connection_timeout();
 835                 rc = ldap_set_option(*ldap_struct, LDAP_OPT_NETWORK_TIMEOUT, &ct);
 836                 if (rc != LDAP_SUCCESS) {
 837                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
 838                                 (int)ct.tv_sec, ldap_err2string(rc)));
 839                 }
 840         }
 841 #endif
 842
 843         return LDAP_SUCCESS;
 844 }
 845
 846 /********************************************************************
 847  try to upgrade to Version 3 LDAP if not already, in either case return current
 848  version
 849  *******************************************************************/
 850
 851 int smb_ldap_upgrade_conn(LDAP *ldap_struct, int *new_version)
 852 {
 853         int version;
 854         int rc;
 855
 856         /* assume the worst */
 857         *new_version = LDAP_VERSION2;
 858
 859         rc = ldap_get_option(ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 860         if (rc) {
 861                 return rc;
 862         }
 863
 864         if (version == LDAP_VERSION3) {
 865                 *new_version = LDAP_VERSION3;
 866                 return LDAP_SUCCESS;
 867         }
 868
 869         /* try upgrade */
 870         version = LDAP_VERSION3;
 871         rc = ldap_set_option (ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 872         if (rc) {
 873                 return rc;
 874         }
 875
 876         *new_version = LDAP_VERSION3;
 877         return LDAP_SUCCESS;
 878 }
 879
 880 /*******************************************************************
 881  open a connection to the ldap server (just until the bind)
 882  ******************************************************************/
 883
 884 int smb_ldap_setup_full_conn(LDAP **ldap_struct, const char *uri)
 885 {
 886         int rc, version;
 887
 888         rc = smb_ldap_setup_conn(ldap_struct, uri);
 889         if (rc) {
 890                 return rc;
 891         }
 892
 893         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 894         if (rc) {
 895                 return rc;
 896         }
 897
 898         rc = smb_ldap_start_tls(*ldap_struct, version);
 899         if (rc) {
 900                 return rc;
 901         }
 902
 903         return LDAP_SUCCESS;
 904 }
 905
 906 /*******************************************************************
 907  open a connection to the ldap server.
 908 ******************************************************************/
 909 static int smbldap_open_connection (struct smbldap_state *ldap_state)
 910
 911 {
 912         int rc = LDAP_SUCCESS;
 913         int version;
 914         int deref;
 915         LDAP **ldap_struct = &ldap_state->ldap_struct;
 916
 917         rc = smb_ldap_setup_conn(ldap_struct, ldap_state->uri);
 918         if (rc) {
 919                 return rc;
 920         }
 921
 922         /* Store the LDAP pointer in a lookup list */
 923
 924         smbldap_store_state(*ldap_struct, ldap_state);
 925
 926         /* Upgrade to LDAPv3 if possible */
 927
 928         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 929         if (rc) {
 930                 return rc;
 931         }
 932
 933         /* Start TLS if required */
 934
 935         rc = smb_ldap_start_tls(*ldap_struct, version);
 936         if (rc) {
 937                 return rc;
 938         }
 939
 940         /* Set alias dereferencing method */
 941         deref = lp_ldap_deref();
 942         if (deref != -1) {
 943                 if (ldap_set_option (*ldap_struct, LDAP_OPT_DEREF, &deref) != LDAP_OPT_SUCCESS) {
 944                         DEBUG(1,("smbldap_open_connection: Failed to set dereferencing method: %d\n", deref));
 945                 } else {
 946                         DEBUG(5,("Set dereferencing method: %d\n", deref));
 947                 }
 948         }
 949
 950         DEBUG(2, ("smbldap_open_connection: connection opened\n"));
 951         return rc;
 952 }
 953
 954 /*******************************************************************
 955  a rebind function for authenticated referrals
 956  This version takes a void* that we can shove useful stuff in :-)
 957 ******************************************************************/
 958 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 959 #else
 960 static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp,
 961                                    int *methodp, int freeit, void *arg)
 962 {
 963         struct smbldap_state *ldap_state = arg;
 964
 965         /** @TODO Should we be doing something to check what servers we rebind to?
 966             Could we get a referral to a machine that we don't want to give our
 967             username and password to? */
 968
 969         if (freeit) {
 970                 SAFE_FREE(*whop);
 971                 if (*credp) {
 972                         memset(*credp, '\0', strlen(*credp));
 973                 }
 974                 SAFE_FREE(*credp);
 975         } else {
 976                 DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n",
 977                           ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
 978
 979                 if (ldap_state->anonymous) {
 980                         *whop = NULL;
 981                         *credp = NULL;
 982                 } else {
 983                         *whop = SMB_STRDUP(ldap_state->bind_dn);
 984                         if (!*whop) {
 985                                 return LDAP_NO_MEMORY;
 986                         }
 987                         *credp = SMB_STRDUP(ldap_state->bind_secret);
 988                         if (!*credp) {
 989                                 SAFE_FREE(*whop);
 990                                 return LDAP_NO_MEMORY;
 991                         }
 992                 }
 993                 *methodp = LDAP_AUTH_SIMPLE;
 994         }
 995
 996         GetTimeOfDay(&ldap_state->last_rebind);
 997
 998         return 0;
 999 }
1000 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1001
1002 /*******************************************************************
1003  a rebind function for authenticated referrals
1004  This version takes a void* that we can shove useful stuff in :-)
1005  and actually does the connection.
1006 ******************************************************************/
1007 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1008 static int rebindproc_connect_with_state (LDAP *ldap_struct,
1009                                           LDAP_CONST char *url,
1010                                           ber_tag_t request,
1011                                           ber_int_t msgid, void *arg)
1012 {
1013         struct smbldap_state *ldap_state =
1014                 (struct smbldap_state *)arg;
1015         int rc;
1016         int version;
1017
1018         DEBUG(5,("rebindproc_connect_with_state: Rebinding to %s as \"%s\"\n",
1019                  url, ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
1020
1021         /* call START_TLS again (ldaps:// is handled by the OpenLDAP library
1022          * itself) before rebinding to another LDAP server to avoid to expose
1023          * our credentials. At least *try* to secure the connection - Guenther */
1024
1025         smb_ldap_upgrade_conn(ldap_struct, &version);
1026         smb_ldap_start_tls(ldap_struct, version);
1027
1028         /** @TODO Should we be doing something to check what servers we rebind to?
1029             Could we get a referral to a machine that we don't want to give our
1030             username and password to? */
1031
1032         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
1033
1034         /* only set the last rebind timestamp when we did rebind after a
1035          * non-read LDAP operation. That way we avoid the replication sleep
1036          * after a simple redirected search operation - Guenther */
1037
1038         switch (request) {
1039
1040                 case LDAP_REQ_MODIFY:
1041                 case LDAP_REQ_ADD:
1042                 case LDAP_REQ_DELETE:
1043                 case LDAP_REQ_MODDN:
1044                 case LDAP_REQ_EXTENDED:
1045                         DEBUG(10,("rebindproc_connect_with_state: "
1046                                 "setting last_rebind timestamp "
1047                                 "(req: 0x%02x)\n", (unsigned int)request));
1048                         GetTimeOfDay(&ldap_state->last_rebind);
1049                         break;
1050                 default:
1051                         ZERO_STRUCT(ldap_state->last_rebind);
1052                         break;
1053         }
1054
1055         return rc;
1056 }
1057 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1058
1059 /*******************************************************************
1060  Add a rebind function for authenticated referrals
1061 ******************************************************************/
1062 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1063 #else
1064 # if LDAP_SET_REBIND_PROC_ARGS == 2
1065 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
1066                        int *method, int freeit )
1067 {
1068         struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
1069
1070         return rebindproc_with_state(ldap_struct, whop, credp,
1071                                      method, freeit, ldap_state);
1072 }
1073 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
1074 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1075
1076 /*******************************************************************
1077  a rebind function for authenticated referrals
1078  this also does the connection, but no void*.
1079 ******************************************************************/
1080 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1081 # if LDAP_SET_REBIND_PROC_ARGS == 2
1082 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
1083                                ber_int_t msgid)
1084 {
1085         struct smbldap_state *ldap_state = smbldap_find_state(ld);
1086
1087         return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid,
1088                                              ldap_state);
1089 }
1090 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
1091 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1092
1093 /*******************************************************************
1094  connect to the ldap server under system privilege.
1095 ******************************************************************/
1096 static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_struct)
1097 {
1098         int rc;
1099         int version;
1100
1101         if (!ldap_state->anonymous && !ldap_state->bind_dn) {
1102                 char *bind_dn = NULL;
1103                 char *bind_secret = NULL;
1104
1105                 /* get the default dn and password only if they are not set already */
1106                 if (!fetch_ldap_pw(&bind_dn, &bind_secret)) {
1107                         DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
1108                         return LDAP_INVALID_CREDENTIALS;
1109                 }
1110                 smbldap_set_creds(ldap_state, false, bind_dn, bind_secret);
1111                 SAFE_FREE(bind_dn);
1112                 memset(bind_secret, '\0', strlen(bind_secret));
1113                 SAFE_FREE(bind_secret);
1114         }
1115
1116         /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite
1117            (OpenLDAP) doesnt' seem to support it */
1118
1119         DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
1120                   ldap_state->uri, ldap_state->bind_dn));
1121
1122 #ifdef HAVE_LDAP_SET_REBIND_PROC
1123 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1124 # if LDAP_SET_REBIND_PROC_ARGS == 2
1125         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect);
1126 # endif
1127 # if LDAP_SET_REBIND_PROC_ARGS == 3
1128         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);
1129 # endif
1130 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1131 # if LDAP_SET_REBIND_PROC_ARGS == 2
1132         ldap_set_rebind_proc(ldap_struct, &rebindproc);
1133 # endif
1134 # if LDAP_SET_REBIND_PROC_ARGS == 3
1135         ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);
1136 # endif
1137 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1138 #endif
1139
1140         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
1141
1142         if (rc != LDAP_SUCCESS) {
1143                 char *ld_error = NULL;
1144                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
1145                                 &ld_error);
1146                 DEBUG(ldap_state->num_failures ? 2 : 0,
1147                       ("failed to bind to server %s with dn=\"%s\" Error: %s\n\t%s\n",
1148                                ldap_state->uri,
1149                                ldap_state->bind_dn ? ldap_state->bind_dn : "[Anonymous bind]",
1150                                ldap_err2string(rc),
1151                                ld_error ? ld_error : "(unknown)"));
1152                 SAFE_FREE(ld_error);
1153                 ldap_state->num_failures++;
1154                 return rc;
1155         }
1156
1157         ldap_state->num_failures = 0;
1158         ldap_state->paged_results = False;
1159
1160         ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
1161
1162         if (smbldap_has_control(ldap_state->ldap_struct, ADS_PAGE_CTL_OID) && version == 3) {
1163                 ldap_state->paged_results = True;
1164         }
1165
1166         DEBUG(3, ("ldap_connect_system: successful connection to the LDAP server\n"));
1167         DEBUGADD(10, ("ldap_connect_system: LDAP server %s support paged results\n",
1168                 ldap_state->paged_results ? "does" : "does not"));
1169         return rc;
1170 }
1171
1172 static void smbldap_idle_fn(struct event_context *event_ctx,
1173                             struct timed_event *te,
1174                             struct timeval now,
1175                             void *private_data);
1176
1177 /**********************************************************************
1178  Connect to LDAP server (called before every ldap operation)
1179 *********************************************************************/
1180 static int smbldap_open(struct smbldap_state *ldap_state)
1181 {
1182         int rc, opt_rc;
1183         bool reopen = False;
1184         SMB_ASSERT(ldap_state);
1185
1186         if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time(NULL))) {
1187
1188 #ifdef HAVE_UNIXSOCKET
1189                 struct sockaddr_un addr;
1190 #else
1191                 struct sockaddr addr;
1192 #endif
1193                 socklen_t len = sizeof(addr);
1194                 int sd;
1195
1196                 opt_rc = ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd);
1197                 if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 )
1198                         reopen = True;
1199
1200 #ifdef HAVE_UNIXSOCKET
1201                 if (opt_rc == 0 && addr.sun_family == AF_UNIX)
1202                         reopen = True;
1203 #endif
1204                 if (reopen) {
1205                         /* the other end has died. reopen. */
1206                         ldap_unbind(ldap_state->ldap_struct);
1207                         ldap_state->ldap_struct = NULL;
1208                         ldap_state->last_ping = (time_t)0;
1209                 } else {
1210                         ldap_state->last_ping = time(NULL);
1211                 }
1212         }
1213
1214         if (ldap_state->ldap_struct != NULL) {
1215                 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
1216                 return LDAP_SUCCESS;
1217         }
1218
1219         if ((rc = smbldap_open_connection(ldap_state))) {
1220                 return rc;
1221         }
1222
1223         if ((rc = smbldap_connect_system(ldap_state, ldap_state->ldap_struct))) {
1224                 ldap_unbind(ldap_state->ldap_struct);
1225                 ldap_state->ldap_struct = NULL;
1226                 return rc;
1227         }
1228
1229
1230         ldap_state->last_ping = time(NULL);
1231         ldap_state->pid = sys_getpid();
1232
1233         TALLOC_FREE(ldap_state->idle_event);
1234
1235         if (ldap_state->event_context != NULL) {
1236                 ldap_state->idle_event = event_add_timed(
1237                         ldap_state->event_context, NULL,
1238                         timeval_current_ofs(SMBLDAP_IDLE_TIME, 0),
1239                         smbldap_idle_fn, ldap_state);
1240         }
1241
1242         DEBUG(4,("The LDAP server is successfully connected\n"));
1243
1244         return LDAP_SUCCESS;
1245 }
1246
1247 /**********************************************************************
1248 Disconnect from LDAP server
1249 *********************************************************************/
1250 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
1251 {
1252         if (!ldap_state)
1253                 return NT_STATUS_INVALID_PARAMETER;
1254
1255         if (ldap_state->ldap_struct != NULL) {
1256                 ldap_unbind(ldap_state->ldap_struct);
1257                 ldap_state->ldap_struct = NULL;
1258         }
1259
1260         smbldap_delete_state(ldap_state);
1261
1262         DEBUG(5,("The connection to the LDAP server was closed\n"));
1263         /* maybe free the results here --metze */
1264
1265         return NT_STATUS_OK;
1266 }
1267
1268 static bool got_alarm;
1269
1270 static void (*old_handler)(int);
1271
1272 static void gotalarm_sig(int dummy)
1273 {
1274         got_alarm = True;
1275 }
1276
1277 static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
1278                             int *attempts, time_t endtime)
1279 {
1280         time_t now = time(NULL);
1281         int open_rc = LDAP_SERVER_DOWN;
1282
1283         if (*rc != LDAP_SERVER_DOWN)
1284                 goto no_next;
1285
1286         if (now >= endtime) {
1287                 smbldap_close(ldap_state);
1288                 *rc = LDAP_TIMEOUT;
1289                 goto no_next;
1290         }
1291
1292         if (*attempts == 0) {
1293                 got_alarm = False;
1294                 old_handler = CatchSignal(SIGALRM, gotalarm_sig);
1295                 alarm(endtime - now);
1296
1297                 if (ldap_state->pid != sys_getpid())
1298                         smbldap_close(ldap_state);
1299         }
1300
1301         while (1) {
1302
1303                 if (*attempts != 0)
1304                         smb_msleep(1000);
1305
1306                 *attempts += 1;
1307
1308                 open_rc = smbldap_open(ldap_state);
1309
1310                 if (open_rc == LDAP_SUCCESS) {
1311                         ldap_state->last_use = now;
1312                         return True;
1313                 }
1314
1315                 if (open_rc == LDAP_INSUFFICIENT_ACCESS) {
1316                         /* The fact that we are non-root or any other
1317                          * access-denied condition will not change in the next
1318                          * round of trying */
1319                         *rc = open_rc;
1320                         break;
1321                 }
1322
1323                 if (got_alarm) {
1324                         *rc = LDAP_TIMEOUT;
1325                         break;
1326                 }
1327
1328                 if (open_rc != LDAP_SUCCESS) {
1329                         DEBUG(1, ("Connection to LDAP server failed for the "
1330                                   "%d try!\n", *attempts));
1331                 }
1332         }
1333
1334  no_next:
1335         CatchSignal(SIGALRM, old_handler);
1336         alarm(0);
1337         ldap_state->last_use = now;
1338         return False;
1339 }
1340
1341 /*********************************************************************
1342  ********************************************************************/
1343
1344 static int smbldap_search_ext(struct smbldap_state *ldap_state,
1345                               const char *base, int scope, const char *filter,
1346                               const char *attrs[], int attrsonly,
1347                               LDAPControl **sctrls, LDAPControl **cctrls,
1348                               int sizelimit, LDAPMessage **res)
1349 {
1350         int             rc = LDAP_SERVER_DOWN;
1351         int             attempts = 0;
1352         char           *utf8_filter;
1353         time_t          endtime = time(NULL)+lp_ldap_timeout();
1354         struct          timeval timeout;
1355         size_t          converted_size;
1356
1357         SMB_ASSERT(ldap_state);
1358
1359         DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], "
1360                  "scope => [%d]\n", base, filter, scope));
1361
1362         if (ldap_state->last_rebind.tv_sec > 0) {
1363                 struct timeval  tval;
1364                 int64_t tdiff = 0;
1365                 int             sleep_time = 0;
1366
1367                 ZERO_STRUCT(tval);
1368                 GetTimeOfDay(&tval);
1369
1370                 tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
1371                 tdiff /= 1000; /* Convert to milliseconds. */
1372
1373                 sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
1374                 sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
1375
1376                 if (sleep_time > 0) {
1377                         /* we wait for the LDAP replication */
1378                         DEBUG(5,("smbldap_search_ext: waiting %d milliseconds "
1379                                  "for LDAP replication.\n",sleep_time));
1380                         smb_msleep(sleep_time);
1381                         DEBUG(5,("smbldap_search_ext: go on!\n"));
1382                 }
1383                 ZERO_STRUCT(ldap_state->last_rebind);
1384         }
1385
1386         if (!push_utf8_talloc(talloc_tos(), &utf8_filter, filter, &converted_size)) {
1387                 return LDAP_NO_MEMORY;
1388         }
1389
1390         /* Setup timeout for the ldap_search_ext_s call - local and remote. */
1391         timeout.tv_sec = lp_ldap_timeout();
1392         timeout.tv_usec = 0;
1393
1394         /* Setup alarm timeout.... Do we need both of these ? JRA.
1395          * Yes, I think we do need both of these. The server timeout only
1396          * covers the case where the server's operation takes too long. It
1397          * does not cover the case where the request hangs on its way to the
1398          * server. The server side timeout is not strictly necessary, it's
1399          * just a bit more kind to the server. VL. */
1400
1401         got_alarm = 0;
1402         CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
1403         alarm(lp_ldap_timeout());
1404         /* End setup timeout. */
1405
1406         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1407                 rc = ldap_search_ext_s(ldap_state->ldap_struct, base, scope,
1408                                        utf8_filter,
1409                                        CONST_DISCARD(char **, attrs),
1410                                        attrsonly, sctrls, cctrls, &timeout,
1411                                        sizelimit, res);
1412                 if (rc != LDAP_SUCCESS) {
1413                         char *ld_error = NULL;
1414                         int ld_errno;
1415
1416                         ldap_get_option(ldap_state->ldap_struct,
1417                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1418
1419                         ldap_get_option(ldap_state->ldap_struct,
1420                                         LDAP_OPT_ERROR_STRING, &ld_error);
1421                         DEBUG(10, ("Failed search for base: %s, error: %d (%s) "
1422                                    "(%s)\n", base, ld_errno,
1423                                    ldap_err2string(rc),
1424                                    ld_error ? ld_error : "unknown"));
1425                         SAFE_FREE(ld_error);
1426
1427                         if (ld_errno == LDAP_SERVER_DOWN) {
1428                                 ldap_unbind(ldap_state->ldap_struct);
1429                                 ldap_state->ldap_struct = NULL;
1430                         }
1431                 }
1432         }
1433
1434         TALLOC_FREE(utf8_filter);
1435
1436         /* Teardown timeout. */
1437         CatchSignal(SIGALRM, SIGNAL_CAST SIG_IGN);
1438         alarm(0);
1439
1440         if (got_alarm != 0)
1441                 return LDAP_TIMELIMIT_EXCEEDED;
1442
1443         return rc;
1444 }
1445
1446 int smbldap_search(struct smbldap_state *ldap_state,
1447                    const char *base, int scope, const char *filter,
1448                    const char *attrs[], int attrsonly,
1449                    LDAPMessage **res)
1450 {
1451         return smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1452                                   attrsonly, NULL, NULL, LDAP_NO_LIMIT, res);
1453 }
1454
1455 int smbldap_search_paged(struct smbldap_state *ldap_state,
1456                          const char *base, int scope, const char *filter,
1457                          const char **attrs, int attrsonly, int pagesize,
1458                          LDAPMessage **res, void **cookie)
1459 {
1460         LDAPControl     pr;
1461         LDAPControl     **rcontrols;
1462         LDAPControl     *controls[2] = { NULL, NULL};
1463         BerElement      *cookie_be = NULL;
1464         struct berval   *cookie_bv = NULL;
1465         int             tmp = 0, i, rc;
1466         bool            critical = True;
1467
1468         *res = NULL;
1469
1470         DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s],"
1471                  "scope => [%d], pagesize => [%d]\n",
1472                  base, filter, scope, pagesize));
1473
1474         cookie_be = ber_alloc_t(LBER_USE_DER);
1475         if (cookie_be == NULL) {
1476                 DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns "
1477                          "NULL\n"));
1478                 return LDAP_NO_MEMORY;
1479         }
1480
1481         /* construct cookie */
1482         if (*cookie != NULL) {
1483                 ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie);
1484                 ber_bvfree((struct berval *)*cookie); /* don't need it from last time */
1485                 *cookie = NULL;
1486         } else {
1487                 ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0);
1488         }
1489         ber_flatten(cookie_be, &cookie_bv);
1490
1491         pr.ldctl_oid = CONST_DISCARD(char *, ADS_PAGE_CTL_OID);
1492         pr.ldctl_iscritical = (char) critical;
1493         pr.ldctl_value.bv_len = cookie_bv->bv_len;
1494         pr.ldctl_value.bv_val = cookie_bv->bv_val;
1495
1496         controls[0] = &pr;
1497         controls[1] = NULL;
1498
1499         rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1500                                  0, controls, NULL, LDAP_NO_LIMIT, res);
1501
1502         ber_free(cookie_be, 1);
1503         ber_bvfree(cookie_bv);
1504
1505         if (rc != 0) {
1506                 DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) "
1507                          "failed with [%s]\n", filter, ldap_err2string(rc)));
1508                 goto done;
1509         }
1510
1511         DEBUG(3,("smbldap_search_paged: search was successful\n"));
1512
1513         rc = ldap_parse_result(ldap_state->ldap_struct, *res, NULL, NULL,
1514                                NULL, NULL, &rcontrols,  0);
1515         if (rc != 0) {
1516                 DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \
1517                          "with [%s]\n", ldap_err2string(rc)));
1518                 goto done;
1519         }
1520
1521         if (rcontrols == NULL)
1522                 goto done;
1523
1524         for (i=0; rcontrols[i]; i++) {
1525
1526                 if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0)
1527                         continue;
1528
1529                 cookie_be = ber_init(&rcontrols[i]->ldctl_value);
1530                 ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv);
1531                 /* the berval is the cookie, but must be freed when it is all
1532                    done */
1533                 if (cookie_bv->bv_len)
1534                         *cookie=ber_bvdup(cookie_bv);
1535                 else
1536                         *cookie=NULL;
1537                 ber_bvfree(cookie_bv);
1538                 ber_free(cookie_be, 1);
1539                 break;
1540         }
1541         ldap_controls_free(rcontrols);
1542 done:
1543         return rc;
1544 }
1545
1546 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1547 {
1548         int             rc = LDAP_SERVER_DOWN;
1549         int             attempts = 0;
1550         char           *utf8_dn;
1551         time_t          endtime = time(NULL)+lp_ldap_timeout();
1552         size_t          converted_size;
1553
1554         SMB_ASSERT(ldap_state);
1555
1556         DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1557
1558         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1559                 return LDAP_NO_MEMORY;
1560         }
1561
1562         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1563                 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1564                 if (rc != LDAP_SUCCESS) {
1565                         char *ld_error = NULL;
1566                         int ld_errno;
1567
1568                         ldap_get_option(ldap_state->ldap_struct,
1569                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1570
1571                         ldap_get_option(ldap_state->ldap_struct,
1572                                         LDAP_OPT_ERROR_STRING, &ld_error);
1573                         DEBUG(10, ("Failed to modify dn: %s, error: %d (%s) "
1574                                    "(%s)\n", dn, ld_errno,
1575                                    ldap_err2string(rc),
1576                                    ld_error ? ld_error : "unknown"));
1577                         SAFE_FREE(ld_error);
1578
1579                         if (ld_errno == LDAP_SERVER_DOWN) {
1580                                 ldap_unbind(ldap_state->ldap_struct);
1581                                 ldap_state->ldap_struct = NULL;
1582                         }
1583                 }
1584         }
1585
1586         TALLOC_FREE(utf8_dn);
1587         return rc;
1588 }
1589
1590 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1591 {
1592         int             rc = LDAP_SERVER_DOWN;
1593         int             attempts = 0;
1594         char           *utf8_dn;
1595         time_t          endtime = time(NULL)+lp_ldap_timeout();
1596         size_t          converted_size;
1597
1598         SMB_ASSERT(ldap_state);
1599
1600         DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1601
1602         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1603                 return LDAP_NO_MEMORY;
1604         }
1605
1606         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1607                 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1608                 if (rc != LDAP_SUCCESS) {
1609                         char *ld_error = NULL;
1610                         int ld_errno;
1611
1612                         ldap_get_option(ldap_state->ldap_struct,
1613                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1614
1615                         ldap_get_option(ldap_state->ldap_struct,
1616                                         LDAP_OPT_ERROR_STRING, &ld_error);
1617                         DEBUG(10, ("Failed to add dn: %s, error: %d (%s) "
1618                                    "(%s)\n", dn, ld_errno,
1619                                    ldap_err2string(rc),
1620                                    ld_error ? ld_error : "unknown"));
1621                         SAFE_FREE(ld_error);
1622
1623                         if (ld_errno == LDAP_SERVER_DOWN) {
1624                                 ldap_unbind(ldap_state->ldap_struct);
1625                                 ldap_state->ldap_struct = NULL;
1626                         }
1627                 }
1628         }
1629
1630         TALLOC_FREE(utf8_dn);
1631         return rc;
1632 }
1633
1634 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1635 {
1636         int             rc = LDAP_SERVER_DOWN;
1637         int             attempts = 0;
1638         char           *utf8_dn;
1639         time_t          endtime = time(NULL)+lp_ldap_timeout();
1640         size_t          converted_size;
1641
1642         SMB_ASSERT(ldap_state);
1643
1644         DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1645
1646         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1647                 return LDAP_NO_MEMORY;
1648         }
1649
1650         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1651                 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1652                 if (rc != LDAP_SUCCESS) {
1653                         char *ld_error = NULL;
1654                         int ld_errno;
1655
1656                         ldap_get_option(ldap_state->ldap_struct,
1657                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1658
1659                         ldap_get_option(ldap_state->ldap_struct,
1660                                         LDAP_OPT_ERROR_STRING, &ld_error);
1661                         DEBUG(10, ("Failed to delete dn: %s, error: %d (%s) "
1662                                    "(%s)\n", dn, ld_errno,
1663                                    ldap_err2string(rc),
1664                                    ld_error ? ld_error : "unknown"));
1665                         SAFE_FREE(ld_error);
1666
1667                         if (ld_errno == LDAP_SERVER_DOWN) {
1668                                 ldap_unbind(ldap_state->ldap_struct);
1669                                 ldap_state->ldap_struct = NULL;
1670                         }
1671                 }
1672         }
1673
1674         TALLOC_FREE(utf8_dn);
1675         return rc;
1676 }
1677
1678 int smbldap_extended_operation(struct smbldap_state *ldap_state,
1679                                LDAP_CONST char *reqoid, struct berval *reqdata,
1680                                LDAPControl **serverctrls, LDAPControl **clientctrls,
1681                                char **retoidp, struct berval **retdatap)
1682 {
1683         int             rc = LDAP_SERVER_DOWN;
1684         int             attempts = 0;
1685         time_t          endtime = time(NULL)+lp_ldap_timeout();
1686
1687         if (!ldap_state)
1688                 return (-1);
1689
1690         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1691                 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
1692                                                reqdata, serverctrls,
1693                                                clientctrls, retoidp, retdatap);
1694                 if (rc != LDAP_SUCCESS) {
1695                         char *ld_error = NULL;
1696                         int ld_errno;
1697
1698                         ldap_get_option(ldap_state->ldap_struct,
1699                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1700
1701                         ldap_get_option(ldap_state->ldap_struct,
1702                                         LDAP_OPT_ERROR_STRING, &ld_error);
1703                         DEBUG(10, ("Extended operation failed with error: "
1704                                    "%d (%s) (%s)\n", ld_errno,
1705                                    ldap_err2string(rc),
1706                                    ld_error ? ld_error : "unknown"));
1707                         SAFE_FREE(ld_error);
1708
1709                         if (ld_errno == LDAP_SERVER_DOWN) {
1710                                 ldap_unbind(ldap_state->ldap_struct);
1711                                 ldap_state->ldap_struct = NULL;
1712                         }
1713                 }
1714         }
1715
1716         return rc;
1717 }
1718
1719 /*******************************************************************
1720  run the search by name.
1721 ******************************************************************/
1722 int smbldap_search_suffix (struct smbldap_state *ldap_state,
1723                            const char *filter, const char **search_attr,
1724                            LDAPMessage ** result)
1725 {
1726         return smbldap_search(ldap_state, lp_ldap_suffix(), LDAP_SCOPE_SUBTREE,
1727                               filter, search_attr, 0, result);
1728 }
1729
1730 static void smbldap_idle_fn(struct event_context *event_ctx,
1731                             struct timed_event *te,
1732                             struct timeval now,
1733                             void *private_data)
1734 {
1735         struct smbldap_state *state = (struct smbldap_state *)private_data;
1736
1737         TALLOC_FREE(state->idle_event);
1738
1739         if (state->ldap_struct == NULL) {
1740                 DEBUG(10,("ldap connection not connected...\n"));
1741                 return;
1742         }
1743
1744         if ((state->last_use+SMBLDAP_IDLE_TIME) > now.tv_sec) {
1745                 DEBUG(10,("ldap connection not idle...\n"));
1746
1747                 state->idle_event = event_add_timed(
1748                         event_ctx, NULL,
1749                         timeval_add(&now, SMBLDAP_IDLE_TIME, 0),
1750                         smbldap_idle_fn,
1751                         private_data);
1752                 return;
1753         }
1754
1755         DEBUG(7,("ldap connection idle...closing connection\n"));
1756         smbldap_close(state);
1757 }
1758
1759 /**********************************************************************
1760  Housekeeping
1761  *********************************************************************/
1762
1763 void smbldap_free_struct(struct smbldap_state **ldap_state)
1764 {
1765         smbldap_close(*ldap_state);
1766
1767         if ((*ldap_state)->bind_secret) {
1768                 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1769         }
1770
1771         SAFE_FREE((*ldap_state)->bind_dn);
1772         SAFE_FREE((*ldap_state)->bind_secret);
1773
1774         TALLOC_FREE((*ldap_state)->idle_event);
1775
1776         *ldap_state = NULL;
1777
1778         /* No need to free any further, as it is talloc()ed */
1779 }
1780
1781
1782 /**********************************************************************
1783  Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1784  *********************************************************************/
1785
1786 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, struct event_context *event_ctx,
1787                       const char *location,
1788                       struct smbldap_state **smbldap_state)
1789 {
1790         *smbldap_state = TALLOC_ZERO_P(mem_ctx, struct smbldap_state);
1791         if (!*smbldap_state) {
1792                 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1793                 return NT_STATUS_NO_MEMORY;
1794         }
1795
1796         if (location) {
1797                 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1798         } else {
1799                 (*smbldap_state)->uri = "ldap://localhost";
1800         }
1801
1802         (*smbldap_state)->event_context = event_ctx;
1803
1804         return NT_STATUS_OK;
1805 }
1806
1807  char *smbldap_talloc_dn(TALLOC_CTX *mem_ctx, LDAP *ld,
1808                          LDAPMessage *entry)
1809 {
1810         char *utf8_dn, *unix_dn;
1811         size_t converted_size;
1812
1813         utf8_dn = ldap_get_dn(ld, entry);
1814         if (!utf8_dn) {
1815                 DEBUG (5, ("smbldap_talloc_dn: ldap_get_dn failed\n"));
1816                 return NULL;
1817         }
1818         if (!pull_utf8_talloc(mem_ctx, &unix_dn, utf8_dn, &converted_size)) {
1819                 DEBUG (0, ("smbldap_talloc_dn: String conversion failure utf8 "
1820                            "[%s]\n", utf8_dn));
1821                 return NULL;
1822         }
1823         ldap_memfree(utf8_dn);
1824         return unix_dn;
1825 }
1826
1827 /*******************************************************************
1828  Check if root-dse has a certain Control or Extension
1829 ********************************************************************/
1830
1831 static bool smbldap_check_root_dse(LDAP *ld, const char **attrs, const char *value)
1832 {
1833         LDAPMessage *msg = NULL;
1834         LDAPMessage *entry = NULL;
1835         char **values = NULL;
1836         int rc, num_result, num_values, i;
1837         bool result = False;
1838
1839         if (!attrs[0]) {
1840                 DEBUG(3,("smbldap_check_root_dse: nothing to look for\n"));
1841                 return False;
1842         }
1843
1844         if (!strequal(attrs[0], "supportedExtension") &&
1845             !strequal(attrs[0], "supportedControl") &&
1846             !strequal(attrs[0], "namingContexts")) {
1847                 DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0]));
1848                 return False;
1849         }
1850
1851         rc = ldap_search_s(ld, "", LDAP_SCOPE_BASE,
1852                            "(objectclass=*)", CONST_DISCARD(char **, attrs), 0 , &msg);
1853
1854         if (rc != LDAP_SUCCESS) {
1855                 DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n"));
1856                 return False;
1857         }
1858
1859         num_result = ldap_count_entries(ld, msg);
1860
1861         if (num_result != 1) {
1862                 DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result));
1863                 goto done;
1864         }
1865
1866         entry = ldap_first_entry(ld, msg);
1867
1868         if (entry == NULL) {
1869                 DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n"));
1870                 goto done;
1871         }
1872
1873         values = ldap_get_values(ld, entry, attrs[0]);
1874
1875         if (values == NULL) {
1876                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0]));
1877                 goto done;
1878         }
1879
1880         num_values = ldap_count_values(values);
1881
1882         if (num_values == 0) {
1883                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0]));
1884                 goto done;
1885         }
1886
1887         for (i=0; i<num_values; i++) {
1888                 if (strcmp(values[i], value) == 0)
1889                         result = True;
1890         }
1891
1892
1893  done:
1894         if (values != NULL)
1895                 ldap_value_free(values);
1896         if (msg != NULL)
1897                 ldap_msgfree(msg);
1898
1899         return result;
1900
1901 }
1902
1903 /*******************************************************************
1904  Check if LDAP-Server supports a certain Control (OID in string format)
1905 ********************************************************************/
1906
1907 bool smbldap_has_control(LDAP *ld, const char *control)
1908 {
1909         const char *attrs[] = { "supportedControl", NULL };
1910         return smbldap_check_root_dse(ld, attrs, control);
1911 }
1912
1913 /*******************************************************************
1914  Check if LDAP-Server supports a certain Extension (OID in string format)
1915 ********************************************************************/
1916
1917 bool smbldap_has_extension(LDAP *ld, const char *extension)
1918 {
1919         const char *attrs[] = { "supportedExtension", NULL };
1920         return smbldap_check_root_dse(ld, attrs, extension);
1921 }
1922
1923 /*******************************************************************
1924  Check if LDAP-Server holds a given namingContext
1925 ********************************************************************/
1926
1927 bool smbldap_has_naming_context(LDAP *ld, const char *naming_context)
1928 {
1929         const char *attrs[] = { "namingContexts", NULL };
1930         return smbldap_check_root_dse(ld, attrs, naming_context);
1931 }
1932
1933 bool smbldap_set_creds(struct smbldap_state *ldap_state, bool anon, const char *dn, const char *secret)
1934 {
1935         ldap_state->anonymous = anon;
1936
1937         /* free any previously set credential */
1938
1939         SAFE_FREE(ldap_state->bind_dn);
1940         if (ldap_state->bind_secret) {
1941                 /* make sure secrets are zeroed out of memory */
1942                 memset(ldap_state->bind_secret, '\0', strlen(ldap_state->bind_secret));
1943                 SAFE_FREE(ldap_state->bind_secret);
1944         }
1945
1946         if ( ! anon) {
1947                 ldap_state->bind_dn = SMB_STRDUP(dn);
1948                 ldap_state->bind_secret = SMB_STRDUP(secret);
1949         }
1950
1951         return True;
1952 }