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)
1097 {
1098         LDAP *ldap_struct = ldap_state->ldap_struct;
1099         int rc;
1100         int version;
1101
1102         if (!ldap_state->anonymous && !ldap_state->bind_dn) {
1103                 char *bind_dn = NULL;
1104                 char *bind_secret = NULL;
1105
1106                 /* get the default dn and password only if they are not set already */
1107                 if (!fetch_ldap_pw(&bind_dn, &bind_secret)) {
1108                         DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
1109                         rc = LDAP_INVALID_CREDENTIALS;
1110                         goto done;
1111                 }
1112                 smbldap_set_creds(ldap_state, false, bind_dn, bind_secret);
1113                 SAFE_FREE(bind_dn);
1114                 memset(bind_secret, '\0', strlen(bind_secret));
1115                 SAFE_FREE(bind_secret);
1116         }
1117
1118         /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite
1119            (OpenLDAP) doesnt' seem to support it */
1120
1121         DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
1122                   ldap_state->uri, ldap_state->bind_dn));
1123
1124 #ifdef HAVE_LDAP_SET_REBIND_PROC
1125 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1126 # if LDAP_SET_REBIND_PROC_ARGS == 2
1127         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect);
1128 # endif
1129 # if LDAP_SET_REBIND_PROC_ARGS == 3
1130         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);
1131 # endif
1132 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1133 # if LDAP_SET_REBIND_PROC_ARGS == 2
1134         ldap_set_rebind_proc(ldap_struct, &rebindproc);
1135 # endif
1136 # if LDAP_SET_REBIND_PROC_ARGS == 3
1137         ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);
1138 # endif
1139 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1140 #endif
1141
1142         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
1143
1144         if (rc != LDAP_SUCCESS) {
1145                 char *ld_error = NULL;
1146                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
1147                                 &ld_error);
1148                 DEBUG(ldap_state->num_failures ? 2 : 0,
1149                       ("failed to bind to server %s with dn=\"%s\" Error: %s\n\t%s\n",
1150                                ldap_state->uri,
1151                                ldap_state->bind_dn ? ldap_state->bind_dn : "[Anonymous bind]",
1152                                ldap_err2string(rc),
1153                                ld_error ? ld_error : "(unknown)"));
1154                 SAFE_FREE(ld_error);
1155                 ldap_state->num_failures++;
1156                 goto done;
1157         }
1158
1159         ldap_state->num_failures = 0;
1160         ldap_state->paged_results = False;
1161
1162         ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
1163
1164         if (smbldap_has_control(ldap_state->ldap_struct, ADS_PAGE_CTL_OID) && version == 3) {
1165                 ldap_state->paged_results = True;
1166         }
1167
1168         DEBUG(3, ("ldap_connect_system: successful connection to the LDAP server\n"));
1169         DEBUGADD(10, ("ldap_connect_system: LDAP server %s support paged results\n",
1170                 ldap_state->paged_results ? "does" : "does not"));
1171 done:
1172         if (rc != 0) {
1173                 ldap_unbind(ldap_struct);
1174                 ldap_state->ldap_struct = NULL;
1175         }
1176         return rc;
1177 }
1178
1179 static void smbldap_idle_fn(struct event_context *event_ctx,
1180                             struct timed_event *te,
1181                             struct timeval now,
1182                             void *private_data);
1183
1184 /**********************************************************************
1185  Connect to LDAP server (called before every ldap operation)
1186 *********************************************************************/
1187 static int smbldap_open(struct smbldap_state *ldap_state)
1188 {
1189         int rc, opt_rc;
1190         bool reopen = False;
1191         SMB_ASSERT(ldap_state);
1192
1193         if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time(NULL))) {
1194
1195 #ifdef HAVE_UNIXSOCKET
1196                 struct sockaddr_un addr;
1197 #else
1198                 struct sockaddr addr;
1199 #endif
1200                 socklen_t len = sizeof(addr);
1201                 int sd;
1202
1203                 opt_rc = ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd);
1204                 if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 )
1205                         reopen = True;
1206
1207 #ifdef HAVE_UNIXSOCKET
1208                 if (opt_rc == 0 && addr.sun_family == AF_UNIX)
1209                         reopen = True;
1210 #endif
1211                 if (reopen) {
1212                         /* the other end has died. reopen. */
1213                         ldap_unbind(ldap_state->ldap_struct);
1214                         ldap_state->ldap_struct = NULL;
1215                         ldap_state->last_ping = (time_t)0;
1216                 } else {
1217                         ldap_state->last_ping = time(NULL);
1218                 }
1219         }
1220
1221         if (ldap_state->ldap_struct != NULL) {
1222                 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
1223                 return LDAP_SUCCESS;
1224         }
1225
1226         if ((rc = smbldap_open_connection(ldap_state))) {
1227                 return rc;
1228         }
1229
1230         if ((rc = smbldap_connect_system(ldap_state))) {
1231                 return rc;
1232         }
1233
1234
1235         ldap_state->last_ping = time(NULL);
1236         ldap_state->pid = sys_getpid();
1237
1238         TALLOC_FREE(ldap_state->idle_event);
1239
1240         if (ldap_state->event_context != NULL) {
1241                 ldap_state->idle_event = event_add_timed(
1242                         ldap_state->event_context, ldap_state,
1243                         timeval_current_ofs(SMBLDAP_IDLE_TIME, 0),
1244                         smbldap_idle_fn, ldap_state);
1245         }
1246
1247         DEBUG(4,("The LDAP server is successfully connected\n"));
1248
1249         return LDAP_SUCCESS;
1250 }
1251
1252 /**********************************************************************
1253 Disconnect from LDAP server
1254 *********************************************************************/
1255 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
1256 {
1257         if (!ldap_state)
1258                 return NT_STATUS_INVALID_PARAMETER;
1259
1260         if (ldap_state->ldap_struct != NULL) {
1261                 ldap_unbind(ldap_state->ldap_struct);
1262                 ldap_state->ldap_struct = NULL;
1263         }
1264
1265         smbldap_delete_state(ldap_state);
1266
1267         TALLOC_FREE(ldap_state->idle_event);
1268
1269         DEBUG(5,("The connection to the LDAP server was closed\n"));
1270         /* maybe free the results here --metze */
1271
1272         return NT_STATUS_OK;
1273 }
1274
1275 static bool got_alarm;
1276
1277 static void (*old_handler)(int);
1278
1279 static void gotalarm_sig(int dummy)
1280 {
1281         got_alarm = True;
1282 }
1283
1284 static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
1285                             int *attempts, time_t endtime)
1286 {
1287         time_t now = time(NULL);
1288         int open_rc = LDAP_SERVER_DOWN;
1289
1290         if (*rc != LDAP_SERVER_DOWN)
1291                 goto no_next;
1292
1293         if (now >= endtime) {
1294                 smbldap_close(ldap_state);
1295                 *rc = LDAP_TIMEOUT;
1296                 goto no_next;
1297         }
1298
1299         if (*attempts == 0) {
1300                 got_alarm = False;
1301                 old_handler = CatchSignal(SIGALRM, gotalarm_sig);
1302                 alarm(endtime - now);
1303
1304                 if (ldap_state->pid != sys_getpid())
1305                         smbldap_close(ldap_state);
1306         }
1307
1308         while (1) {
1309
1310                 if (*attempts != 0)
1311                         smb_msleep(1000);
1312
1313                 *attempts += 1;
1314
1315                 open_rc = smbldap_open(ldap_state);
1316
1317                 if (open_rc == LDAP_SUCCESS) {
1318                         ldap_state->last_use = now;
1319                         return True;
1320                 }
1321
1322                 if (open_rc == LDAP_INSUFFICIENT_ACCESS) {
1323                         /* The fact that we are non-root or any other
1324                          * access-denied condition will not change in the next
1325                          * round of trying */
1326                         *rc = open_rc;
1327                         break;
1328                 }
1329
1330                 if (got_alarm) {
1331                         *rc = LDAP_TIMEOUT;
1332                         break;
1333                 }
1334
1335                 if (open_rc != LDAP_SUCCESS) {
1336                         DEBUG(1, ("Connection to LDAP server failed for the "
1337                                   "%d try!\n", *attempts));
1338                 }
1339         }
1340
1341  no_next:
1342         CatchSignal(SIGALRM, old_handler);
1343         alarm(0);
1344         ldap_state->last_use = now;
1345         return False;
1346 }
1347
1348 /*********************************************************************
1349  ********************************************************************/
1350
1351 static int smbldap_search_ext(struct smbldap_state *ldap_state,
1352                               const char *base, int scope, const char *filter,
1353                               const char *attrs[], int attrsonly,
1354                               LDAPControl **sctrls, LDAPControl **cctrls,
1355                               int sizelimit, LDAPMessage **res)
1356 {
1357         int             rc = LDAP_SERVER_DOWN;
1358         int             attempts = 0;
1359         char           *utf8_filter;
1360         time_t          endtime = time(NULL)+lp_ldap_timeout();
1361         struct          timeval timeout;
1362         size_t          converted_size;
1363
1364         SMB_ASSERT(ldap_state);
1365
1366         DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], "
1367                  "scope => [%d]\n", base, filter, scope));
1368
1369         if (ldap_state->last_rebind.tv_sec > 0) {
1370                 struct timeval  tval;
1371                 int64_t tdiff = 0;
1372                 int             sleep_time = 0;
1373
1374                 ZERO_STRUCT(tval);
1375                 GetTimeOfDay(&tval);
1376
1377                 tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
1378                 tdiff /= 1000; /* Convert to milliseconds. */
1379
1380                 sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
1381                 sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
1382
1383                 if (sleep_time > 0) {
1384                         /* we wait for the LDAP replication */
1385                         DEBUG(5,("smbldap_search_ext: waiting %d milliseconds "
1386                                  "for LDAP replication.\n",sleep_time));
1387                         smb_msleep(sleep_time);
1388                         DEBUG(5,("smbldap_search_ext: go on!\n"));
1389                 }
1390                 ZERO_STRUCT(ldap_state->last_rebind);
1391         }
1392
1393         if (!push_utf8_talloc(talloc_tos(), &utf8_filter, filter, &converted_size)) {
1394                 return LDAP_NO_MEMORY;
1395         }
1396
1397         /* Setup timeout for the ldap_search_ext_s call - local and remote. */
1398         timeout.tv_sec = lp_ldap_timeout();
1399         timeout.tv_usec = 0;
1400
1401         /* Setup alarm timeout.... Do we need both of these ? JRA.
1402          * Yes, I think we do need both of these. The server timeout only
1403          * covers the case where the server's operation takes too long. It
1404          * does not cover the case where the request hangs on its way to the
1405          * server. The server side timeout is not strictly necessary, it's
1406          * just a bit more kind to the server. VL. */
1407
1408         got_alarm = 0;
1409         CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
1410         alarm(lp_ldap_timeout());
1411         /* End setup timeout. */
1412
1413         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1414                 rc = ldap_search_ext_s(ldap_state->ldap_struct, base, scope,
1415                                        utf8_filter,
1416                                        CONST_DISCARD(char **, attrs),
1417                                        attrsonly, sctrls, cctrls, &timeout,
1418                                        sizelimit, res);
1419                 if (rc != LDAP_SUCCESS) {
1420                         char *ld_error = NULL;
1421                         int ld_errno;
1422
1423                         ldap_get_option(ldap_state->ldap_struct,
1424                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1425
1426                         ldap_get_option(ldap_state->ldap_struct,
1427                                         LDAP_OPT_ERROR_STRING, &ld_error);
1428                         DEBUG(10, ("Failed search for base: %s, error: %d (%s) "
1429                                    "(%s)\n", base, ld_errno,
1430                                    ldap_err2string(rc),
1431                                    ld_error ? ld_error : "unknown"));
1432                         SAFE_FREE(ld_error);
1433
1434                         if (ld_errno == LDAP_SERVER_DOWN) {
1435                                 ldap_unbind(ldap_state->ldap_struct);
1436                                 ldap_state->ldap_struct = NULL;
1437                         }
1438                 }
1439         }
1440
1441         TALLOC_FREE(utf8_filter);
1442
1443         /* Teardown timeout. */
1444         CatchSignal(SIGALRM, SIGNAL_CAST SIG_IGN);
1445         alarm(0);
1446
1447         if (got_alarm != 0)
1448                 return LDAP_TIMELIMIT_EXCEEDED;
1449
1450         return rc;
1451 }
1452
1453 int smbldap_search(struct smbldap_state *ldap_state,
1454                    const char *base, int scope, const char *filter,
1455                    const char *attrs[], int attrsonly,
1456                    LDAPMessage **res)
1457 {
1458         return smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1459                                   attrsonly, NULL, NULL, LDAP_NO_LIMIT, res);
1460 }
1461
1462 int smbldap_search_paged(struct smbldap_state *ldap_state,
1463                          const char *base, int scope, const char *filter,
1464                          const char **attrs, int attrsonly, int pagesize,
1465                          LDAPMessage **res, void **cookie)
1466 {
1467         LDAPControl     pr;
1468         LDAPControl     **rcontrols;
1469         LDAPControl     *controls[2] = { NULL, NULL};
1470         BerElement      *cookie_be = NULL;
1471         struct berval   *cookie_bv = NULL;
1472         int             tmp = 0, i, rc;
1473         bool            critical = True;
1474
1475         *res = NULL;
1476
1477         DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s],"
1478                  "scope => [%d], pagesize => [%d]\n",
1479                  base, filter, scope, pagesize));
1480
1481         cookie_be = ber_alloc_t(LBER_USE_DER);
1482         if (cookie_be == NULL) {
1483                 DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns "
1484                          "NULL\n"));
1485                 return LDAP_NO_MEMORY;
1486         }
1487
1488         /* construct cookie */
1489         if (*cookie != NULL) {
1490                 ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie);
1491                 ber_bvfree((struct berval *)*cookie); /* don't need it from last time */
1492                 *cookie = NULL;
1493         } else {
1494                 ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0);
1495         }
1496         ber_flatten(cookie_be, &cookie_bv);
1497
1498         pr.ldctl_oid = CONST_DISCARD(char *, ADS_PAGE_CTL_OID);
1499         pr.ldctl_iscritical = (char) critical;
1500         pr.ldctl_value.bv_len = cookie_bv->bv_len;
1501         pr.ldctl_value.bv_val = cookie_bv->bv_val;
1502
1503         controls[0] = &pr;
1504         controls[1] = NULL;
1505
1506         rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1507                                  0, controls, NULL, LDAP_NO_LIMIT, res);
1508
1509         ber_free(cookie_be, 1);
1510         ber_bvfree(cookie_bv);
1511
1512         if (rc != 0) {
1513                 DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) "
1514                          "failed with [%s]\n", filter, ldap_err2string(rc)));
1515                 goto done;
1516         }
1517
1518         DEBUG(3,("smbldap_search_paged: search was successful\n"));
1519
1520         rc = ldap_parse_result(ldap_state->ldap_struct, *res, NULL, NULL,
1521                                NULL, NULL, &rcontrols,  0);
1522         if (rc != 0) {
1523                 DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \
1524                          "with [%s]\n", ldap_err2string(rc)));
1525                 goto done;
1526         }
1527
1528         if (rcontrols == NULL)
1529                 goto done;
1530
1531         for (i=0; rcontrols[i]; i++) {
1532
1533                 if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0)
1534                         continue;
1535
1536                 cookie_be = ber_init(&rcontrols[i]->ldctl_value);
1537                 ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv);
1538                 /* the berval is the cookie, but must be freed when it is all
1539                    done */
1540                 if (cookie_bv->bv_len)
1541                         *cookie=ber_bvdup(cookie_bv);
1542                 else
1543                         *cookie=NULL;
1544                 ber_bvfree(cookie_bv);
1545                 ber_free(cookie_be, 1);
1546                 break;
1547         }
1548         ldap_controls_free(rcontrols);
1549 done:
1550         return rc;
1551 }
1552
1553 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1554 {
1555         int             rc = LDAP_SERVER_DOWN;
1556         int             attempts = 0;
1557         char           *utf8_dn;
1558         time_t          endtime = time(NULL)+lp_ldap_timeout();
1559         size_t          converted_size;
1560
1561         SMB_ASSERT(ldap_state);
1562
1563         DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1564
1565         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1566                 return LDAP_NO_MEMORY;
1567         }
1568
1569         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1570                 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1571                 if (rc != LDAP_SUCCESS) {
1572                         char *ld_error = NULL;
1573                         int ld_errno;
1574
1575                         ldap_get_option(ldap_state->ldap_struct,
1576                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1577
1578                         ldap_get_option(ldap_state->ldap_struct,
1579                                         LDAP_OPT_ERROR_STRING, &ld_error);
1580                         DEBUG(10, ("Failed to modify dn: %s, error: %d (%s) "
1581                                    "(%s)\n", dn, ld_errno,
1582                                    ldap_err2string(rc),
1583                                    ld_error ? ld_error : "unknown"));
1584                         SAFE_FREE(ld_error);
1585
1586                         if (ld_errno == LDAP_SERVER_DOWN) {
1587                                 ldap_unbind(ldap_state->ldap_struct);
1588                                 ldap_state->ldap_struct = NULL;
1589                         }
1590                 }
1591         }
1592
1593         TALLOC_FREE(utf8_dn);
1594         return rc;
1595 }
1596
1597 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1598 {
1599         int             rc = LDAP_SERVER_DOWN;
1600         int             attempts = 0;
1601         char           *utf8_dn;
1602         time_t          endtime = time(NULL)+lp_ldap_timeout();
1603         size_t          converted_size;
1604
1605         SMB_ASSERT(ldap_state);
1606
1607         DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1608
1609         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1610                 return LDAP_NO_MEMORY;
1611         }
1612
1613         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1614                 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1615                 if (rc != LDAP_SUCCESS) {
1616                         char *ld_error = NULL;
1617                         int ld_errno;
1618
1619                         ldap_get_option(ldap_state->ldap_struct,
1620                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1621
1622                         ldap_get_option(ldap_state->ldap_struct,
1623                                         LDAP_OPT_ERROR_STRING, &ld_error);
1624                         DEBUG(10, ("Failed to add dn: %s, error: %d (%s) "
1625                                    "(%s)\n", dn, ld_errno,
1626                                    ldap_err2string(rc),
1627                                    ld_error ? ld_error : "unknown"));
1628                         SAFE_FREE(ld_error);
1629
1630                         if (ld_errno == LDAP_SERVER_DOWN) {
1631                                 ldap_unbind(ldap_state->ldap_struct);
1632                                 ldap_state->ldap_struct = NULL;
1633                         }
1634                 }
1635         }
1636
1637         TALLOC_FREE(utf8_dn);
1638         return rc;
1639 }
1640
1641 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1642 {
1643         int             rc = LDAP_SERVER_DOWN;
1644         int             attempts = 0;
1645         char           *utf8_dn;
1646         time_t          endtime = time(NULL)+lp_ldap_timeout();
1647         size_t          converted_size;
1648
1649         SMB_ASSERT(ldap_state);
1650
1651         DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1652
1653         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1654                 return LDAP_NO_MEMORY;
1655         }
1656
1657         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1658                 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1659                 if (rc != LDAP_SUCCESS) {
1660                         char *ld_error = NULL;
1661                         int ld_errno;
1662
1663                         ldap_get_option(ldap_state->ldap_struct,
1664                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1665
1666                         ldap_get_option(ldap_state->ldap_struct,
1667                                         LDAP_OPT_ERROR_STRING, &ld_error);
1668                         DEBUG(10, ("Failed to delete dn: %s, error: %d (%s) "
1669                                    "(%s)\n", dn, ld_errno,
1670                                    ldap_err2string(rc),
1671                                    ld_error ? ld_error : "unknown"));
1672                         SAFE_FREE(ld_error);
1673
1674                         if (ld_errno == LDAP_SERVER_DOWN) {
1675                                 ldap_unbind(ldap_state->ldap_struct);
1676                                 ldap_state->ldap_struct = NULL;
1677                         }
1678                 }
1679         }
1680
1681         TALLOC_FREE(utf8_dn);
1682         return rc;
1683 }
1684
1685 int smbldap_extended_operation(struct smbldap_state *ldap_state,
1686                                LDAP_CONST char *reqoid, struct berval *reqdata,
1687                                LDAPControl **serverctrls, LDAPControl **clientctrls,
1688                                char **retoidp, struct berval **retdatap)
1689 {
1690         int             rc = LDAP_SERVER_DOWN;
1691         int             attempts = 0;
1692         time_t          endtime = time(NULL)+lp_ldap_timeout();
1693
1694         if (!ldap_state)
1695                 return (-1);
1696
1697         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1698                 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
1699                                                reqdata, serverctrls,
1700                                                clientctrls, retoidp, retdatap);
1701                 if (rc != LDAP_SUCCESS) {
1702                         char *ld_error = NULL;
1703                         int ld_errno;
1704
1705                         ldap_get_option(ldap_state->ldap_struct,
1706                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1707
1708                         ldap_get_option(ldap_state->ldap_struct,
1709                                         LDAP_OPT_ERROR_STRING, &ld_error);
1710                         DEBUG(10, ("Extended operation failed with error: "
1711                                    "%d (%s) (%s)\n", ld_errno,
1712                                    ldap_err2string(rc),
1713                                    ld_error ? ld_error : "unknown"));
1714                         SAFE_FREE(ld_error);
1715
1716                         if (ld_errno == LDAP_SERVER_DOWN) {
1717                                 ldap_unbind(ldap_state->ldap_struct);
1718                                 ldap_state->ldap_struct = NULL;
1719                         }
1720                 }
1721         }
1722
1723         return rc;
1724 }
1725
1726 /*******************************************************************
1727  run the search by name.
1728 ******************************************************************/
1729 int smbldap_search_suffix (struct smbldap_state *ldap_state,
1730                            const char *filter, const char **search_attr,
1731                            LDAPMessage ** result)
1732 {
1733         return smbldap_search(ldap_state, lp_ldap_suffix(), LDAP_SCOPE_SUBTREE,
1734                               filter, search_attr, 0, result);
1735 }
1736
1737 static void smbldap_idle_fn(struct event_context *event_ctx,
1738                             struct timed_event *te,
1739                             struct timeval now,
1740                             void *private_data)
1741 {
1742         struct smbldap_state *state = (struct smbldap_state *)private_data;
1743
1744         TALLOC_FREE(state->idle_event);
1745
1746         if (state->ldap_struct == NULL) {
1747                 DEBUG(10,("ldap connection not connected...\n"));
1748                 return;
1749         }
1750
1751         if ((state->last_use+SMBLDAP_IDLE_TIME) > now.tv_sec) {
1752                 DEBUG(10,("ldap connection not idle...\n"));
1753
1754                 state->idle_event = event_add_timed(
1755                         event_ctx, state,
1756                         timeval_add(&now, SMBLDAP_IDLE_TIME, 0),
1757                         smbldap_idle_fn,
1758                         private_data);
1759                 return;
1760         }
1761
1762         DEBUG(7,("ldap connection idle...closing connection\n"));
1763         smbldap_close(state);
1764 }
1765
1766 /**********************************************************************
1767  Housekeeping
1768  *********************************************************************/
1769
1770 void smbldap_free_struct(struct smbldap_state **ldap_state)
1771 {
1772         smbldap_close(*ldap_state);
1773
1774         if ((*ldap_state)->bind_secret) {
1775                 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1776         }
1777
1778         SAFE_FREE((*ldap_state)->bind_dn);
1779         SAFE_FREE((*ldap_state)->bind_secret);
1780
1781         TALLOC_FREE(*ldap_state);
1782
1783         /* No need to free any further, as it is talloc()ed */
1784 }
1785
1786 static int smbldap_state_destructor(struct smbldap_state *state)
1787 {
1788         smbldap_free_struct(&state);
1789         return 0;
1790 }
1791
1792
1793 /**********************************************************************
1794  Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1795  *********************************************************************/
1796
1797 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, struct event_context *event_ctx,
1798                       const char *location,
1799                       struct smbldap_state **smbldap_state)
1800 {
1801         *smbldap_state = TALLOC_ZERO_P(mem_ctx, struct smbldap_state);
1802         if (!*smbldap_state) {
1803                 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1804                 return NT_STATUS_NO_MEMORY;
1805         }
1806
1807         if (location) {
1808                 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1809         } else {
1810                 (*smbldap_state)->uri = "ldap://localhost";
1811         }
1812
1813         (*smbldap_state)->event_context = event_ctx;
1814
1815         talloc_set_destructor(*smbldap_state, smbldap_state_destructor);
1816         return NT_STATUS_OK;
1817 }
1818
1819  char *smbldap_talloc_dn(TALLOC_CTX *mem_ctx, LDAP *ld,
1820                          LDAPMessage *entry)
1821 {
1822         char *utf8_dn, *unix_dn;
1823         size_t converted_size;
1824
1825         utf8_dn = ldap_get_dn(ld, entry);
1826         if (!utf8_dn) {
1827                 DEBUG (5, ("smbldap_talloc_dn: ldap_get_dn failed\n"));
1828                 return NULL;
1829         }
1830         if (!pull_utf8_talloc(mem_ctx, &unix_dn, utf8_dn, &converted_size)) {
1831                 DEBUG (0, ("smbldap_talloc_dn: String conversion failure utf8 "
1832                            "[%s]\n", utf8_dn));
1833                 return NULL;
1834         }
1835         ldap_memfree(utf8_dn);
1836         return unix_dn;
1837 }
1838
1839 /*******************************************************************
1840  Check if root-dse has a certain Control or Extension
1841 ********************************************************************/
1842
1843 static bool smbldap_check_root_dse(LDAP *ld, const char **attrs, const char *value)
1844 {
1845         LDAPMessage *msg = NULL;
1846         LDAPMessage *entry = NULL;
1847         char **values = NULL;
1848         int rc, num_result, num_values, i;
1849         bool result = False;
1850
1851         if (!attrs[0]) {
1852                 DEBUG(3,("smbldap_check_root_dse: nothing to look for\n"));
1853                 return False;
1854         }
1855
1856         if (!strequal(attrs[0], "supportedExtension") &&
1857             !strequal(attrs[0], "supportedControl") &&
1858             !strequal(attrs[0], "namingContexts")) {
1859                 DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0]));
1860                 return False;
1861         }
1862
1863         rc = ldap_search_s(ld, "", LDAP_SCOPE_BASE,
1864                            "(objectclass=*)", CONST_DISCARD(char **, attrs), 0 , &msg);
1865
1866         if (rc != LDAP_SUCCESS) {
1867                 DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n"));
1868                 return False;
1869         }
1870
1871         num_result = ldap_count_entries(ld, msg);
1872
1873         if (num_result != 1) {
1874                 DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result));
1875                 goto done;
1876         }
1877
1878         entry = ldap_first_entry(ld, msg);
1879
1880         if (entry == NULL) {
1881                 DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n"));
1882                 goto done;
1883         }
1884
1885         values = ldap_get_values(ld, entry, attrs[0]);
1886
1887         if (values == NULL) {
1888                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0]));
1889                 goto done;
1890         }
1891
1892         num_values = ldap_count_values(values);
1893
1894         if (num_values == 0) {
1895                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0]));
1896                 goto done;
1897         }
1898
1899         for (i=0; i<num_values; i++) {
1900                 if (strcmp(values[i], value) == 0)
1901                         result = True;
1902         }
1903
1904
1905  done:
1906         if (values != NULL)
1907                 ldap_value_free(values);
1908         if (msg != NULL)
1909                 ldap_msgfree(msg);
1910
1911         return result;
1912
1913 }
1914
1915 /*******************************************************************
1916  Check if LDAP-Server supports a certain Control (OID in string format)
1917 ********************************************************************/
1918
1919 bool smbldap_has_control(LDAP *ld, const char *control)
1920 {
1921         const char *attrs[] = { "supportedControl", NULL };
1922         return smbldap_check_root_dse(ld, attrs, control);
1923 }
1924
1925 /*******************************************************************
1926  Check if LDAP-Server supports a certain Extension (OID in string format)
1927 ********************************************************************/
1928
1929 bool smbldap_has_extension(LDAP *ld, const char *extension)
1930 {
1931         const char *attrs[] = { "supportedExtension", NULL };
1932         return smbldap_check_root_dse(ld, attrs, extension);
1933 }
1934
1935 /*******************************************************************
1936  Check if LDAP-Server holds a given namingContext
1937 ********************************************************************/
1938
1939 bool smbldap_has_naming_context(LDAP *ld, const char *naming_context)
1940 {
1941         const char *attrs[] = { "namingContexts", NULL };
1942         return smbldap_check_root_dse(ld, attrs, naming_context);
1943 }
1944
1945 bool smbldap_set_creds(struct smbldap_state *ldap_state, bool anon, const char *dn, const char *secret)
1946 {
1947         ldap_state->anonymous = anon;
1948
1949         /* free any previously set credential */
1950
1951         SAFE_FREE(ldap_state->bind_dn);
1952         if (ldap_state->bind_secret) {
1953                 /* make sure secrets are zeroed out of memory */
1954                 memset(ldap_state->bind_secret, '\0', strlen(ldap_state->bind_secret));
1955                 SAFE_FREE(ldap_state->bind_secret);
1956         }
1957
1958         if ( ! anon) {
1959                 ldap_state->bind_dn = SMB_STRDUP(dn);
1960                 ldap_state->bind_secret = SMB_STRDUP(secret);
1961         }
1962
1963         return True;
1964 }