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 #include "secrets.h"
  28 #include "../libcli/security/security.h"
  29
  30 /* Try not to hit the up or down server forever */
  31
  32 #define SMBLDAP_DONT_PING_TIME 10       /* ping only all 10 seconds */
  33 #define SMBLDAP_NUM_RETRIES 8           /* retry only 8 times */
  34
  35 #define SMBLDAP_IDLE_TIME 150           /* After 2.5 minutes disconnect */
  36
  37
  38 /* attributes used by Samba 2.2 */
  39
  40 ATTRIB_MAP_ENTRY attrib_map_v22[] = {
  41         { LDAP_ATTR_UID,                "uid"           },
  42         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
  43         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
  44         { LDAP_ATTR_UNIX_HOME,          "homeDirectory" },
  45         { LDAP_ATTR_PWD_LAST_SET,       "pwdLastSet"    },
  46         { LDAP_ATTR_PWD_CAN_CHANGE,     "pwdCanChange"  },
  47         { LDAP_ATTR_PWD_MUST_CHANGE,    "pwdMustChange" },
  48         { LDAP_ATTR_LOGON_TIME,         "logonTime"     },
  49         { LDAP_ATTR_LOGOFF_TIME,        "logoffTime"    },
  50         { LDAP_ATTR_KICKOFF_TIME,       "kickoffTime"   },
  51         { LDAP_ATTR_CN,                 "cn"            },
  52         { LDAP_ATTR_SN,                 "sn"            },
  53         { LDAP_ATTR_DISPLAY_NAME,       "displayName"   },
  54         { LDAP_ATTR_HOME_PATH,          "smbHome"       },
  55         { LDAP_ATTR_HOME_DRIVE,         "homeDrive"     },
  56         { LDAP_ATTR_LOGON_SCRIPT,       "scriptPath"    },
  57         { LDAP_ATTR_PROFILE_PATH,       "profilePath"   },
  58         { LDAP_ATTR_DESC,               "description"   },
  59         { LDAP_ATTR_USER_WKS,           "userWorkstations"},
  60         { LDAP_ATTR_USER_RID,           "rid"           },
  61         { LDAP_ATTR_PRIMARY_GROUP_RID,  "primaryGroupID"},
  62         { LDAP_ATTR_LMPW,               "lmPassword"    },
  63         { LDAP_ATTR_NTPW,               "ntPassword"    },
  64         { LDAP_ATTR_DOMAIN,             "domain"        },
  65         { LDAP_ATTR_OBJCLASS,           "objectClass"   },
  66         { LDAP_ATTR_ACB_INFO,           "acctFlags"     },
  67         { LDAP_ATTR_MOD_TIMESTAMP,      "modifyTimestamp"       },
  68         { LDAP_ATTR_LIST_END,           NULL            }
  69 };
  70
  71 ATTRIB_MAP_ENTRY attrib_map_to_delete_v22[] = {
  72         { LDAP_ATTR_PWD_LAST_SET,       "pwdLastSet"    },
  73         { LDAP_ATTR_PWD_CAN_CHANGE,     "pwdCanChange"  },
  74         { LDAP_ATTR_PWD_MUST_CHANGE,    "pwdMustChange" },
  75         { LDAP_ATTR_LOGON_TIME,         "logonTime"     },
  76         { LDAP_ATTR_LOGOFF_TIME,        "logoffTime"    },
  77         { LDAP_ATTR_KICKOFF_TIME,       "kickoffTime"   },
  78         { LDAP_ATTR_DISPLAY_NAME,       "displayName"   },
  79         { LDAP_ATTR_HOME_PATH,          "smbHome"       },
  80         { LDAP_ATTR_HOME_DRIVE,         "homeDrives"    },
  81         { LDAP_ATTR_LOGON_SCRIPT,       "scriptPath"    },
  82         { LDAP_ATTR_PROFILE_PATH,       "profilePath"   },
  83         { LDAP_ATTR_USER_WKS,           "userWorkstations"},
  84         { LDAP_ATTR_USER_RID,           "rid"           },
  85         { LDAP_ATTR_PRIMARY_GROUP_RID,  "primaryGroupID"},
  86         { LDAP_ATTR_LMPW,               "lmPassword"    },
  87         { LDAP_ATTR_NTPW,               "ntPassword"    },
  88         { LDAP_ATTR_DOMAIN,             "domain"        },
  89         { LDAP_ATTR_ACB_INFO,           "acctFlags"     },
  90         { LDAP_ATTR_LIST_END,           NULL            }
  91 };
  92
  93 /* attributes used by Samba 3.0's sambaSamAccount */
  94
  95 ATTRIB_MAP_ENTRY attrib_map_v30[] = {
  96         { LDAP_ATTR_UID,                "uid"                   },
  97         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
  98         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
  99         { LDAP_ATTR_UNIX_HOME,          "homeDirectory"         },
 100         { LDAP_ATTR_PWD_LAST_SET,       "sambaPwdLastSet"       },
 101         { LDAP_ATTR_PWD_CAN_CHANGE,     "sambaPwdCanChange"     },
 102         { LDAP_ATTR_PWD_MUST_CHANGE,    "sambaPwdMustChange"    },
 103         { LDAP_ATTR_LOGON_TIME,         "sambaLogonTime"        },
 104         { LDAP_ATTR_LOGOFF_TIME,        "sambaLogoffTime"       },
 105         { LDAP_ATTR_KICKOFF_TIME,       "sambaKickoffTime"      },
 106         { LDAP_ATTR_CN,                 "cn"                    },
 107         { LDAP_ATTR_SN,                 "sn"                    },
 108         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 109         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
 110         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
 111         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
 112         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
 113         { LDAP_ATTR_DESC,               "description"           },
 114         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
 115         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
 116         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
 117         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
 118         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
 119         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 120         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 121         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
 122         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
 123         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
 124         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
 125         { LDAP_ATTR_PWD_HISTORY,        "sambaPasswordHistory"  },
 126         { LDAP_ATTR_MOD_TIMESTAMP,      "modifyTimestamp"       },
 127         { LDAP_ATTR_LOGON_HOURS,        "sambaLogonHours"       },
 128         { LDAP_ATTR_LIST_END,           NULL                    }
 129 };
 130
 131 ATTRIB_MAP_ENTRY attrib_map_to_delete_v30[] = {
 132         { LDAP_ATTR_PWD_LAST_SET,       "sambaPwdLastSet"       },
 133         { LDAP_ATTR_PWD_CAN_CHANGE,     "sambaPwdCanChange"     },
 134         { LDAP_ATTR_PWD_MUST_CHANGE,    "sambaPwdMustChange"    },
 135         { LDAP_ATTR_LOGON_TIME,         "sambaLogonTime"        },
 136         { LDAP_ATTR_LOGOFF_TIME,        "sambaLogoffTime"       },
 137         { LDAP_ATTR_KICKOFF_TIME,       "sambaKickoffTime"      },
 138         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 139         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
 140         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
 141         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
 142         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
 143         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
 144         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
 145         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
 146         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
 147         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
 148         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 149         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
 150         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
 151         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
 152         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
 153         { LDAP_ATTR_PWD_HISTORY,        "sambaPasswordHistory"  },
 154         { LDAP_ATTR_LOGON_HOURS,        "sambaLogonHours"       },
 155         { LDAP_ATTR_LIST_END,           NULL                    }
 156 };
 157
 158 /* attributes used for allocating RIDs */
 159
 160 ATTRIB_MAP_ENTRY dominfo_attr_list[] = {
 161         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 162         { LDAP_ATTR_NEXT_RID,           "sambaNextRid"          },
 163         { LDAP_ATTR_NEXT_USERRID,       "sambaNextUserRid"      },
 164         { LDAP_ATTR_NEXT_GROUPRID,      "sambaNextGroupRid"     },
 165         { LDAP_ATTR_DOM_SID,            LDAP_ATTRIBUTE_SID      },
 166         { LDAP_ATTR_ALGORITHMIC_RID_BASE,"sambaAlgorithmicRidBase"},
 167         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 168         { LDAP_ATTR_LIST_END,           NULL                    },
 169 };
 170
 171 /* Samba 3.0 group mapping attributes */
 172
 173 ATTRIB_MAP_ENTRY groupmap_attr_list[] = {
 174         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 175         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
 176         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
 177         { LDAP_ATTR_SID_LIST,           "sambaSIDList"          },
 178         { LDAP_ATTR_DESC,               "description"           },
 179         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 180         { LDAP_ATTR_CN,                 "cn"                    },
 181         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 182         { LDAP_ATTR_LIST_END,           NULL                    }
 183 };
 184
 185 ATTRIB_MAP_ENTRY groupmap_attr_list_to_delete[] = {
 186         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
 187         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
 188         { LDAP_ATTR_DESC,               "description"           },
 189         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 190         { LDAP_ATTR_SID_LIST,           "sambaSIDList"          },
 191         { LDAP_ATTR_LIST_END,           NULL                    }
 192 };
 193
 194 /* idmap_ldap sambaUnixIdPool */
 195
 196 ATTRIB_MAP_ENTRY idpool_attr_list[] = {
 197         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 198         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 199         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 200         { LDAP_ATTR_LIST_END,           NULL                    }
 201 };
 202
 203 ATTRIB_MAP_ENTRY sidmap_attr_list[] = {
 204         { LDAP_ATTR_SID,                LDAP_ATTRIBUTE_SID      },
 205         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 206         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 207         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 208         { LDAP_ATTR_LIST_END,           NULL                    }
 209 };
 210
 211 /**********************************************************************
 212  perform a simple table lookup and return the attribute name
 213  **********************************************************************/
 214
 215  const char* get_attr_key2string( ATTRIB_MAP_ENTRY table[], int key )
 216 {
 217         int i = 0;
 218
 219         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
 220                 if ( table[i].attrib == key )
 221                         return table[i].name;
 222                 i++;
 223         }
 224
 225         return NULL;
 226 }
 227
 228
 229 /**********************************************************************
 230  Return the list of attribute names from a mapping table
 231  **********************************************************************/
 232
 233  const char** get_attr_list( TALLOC_CTX *mem_ctx, ATTRIB_MAP_ENTRY table[] )
 234 {
 235         const char **names;
 236         int i = 0;
 237
 238         while ( table[i].attrib != LDAP_ATTR_LIST_END )
 239                 i++;
 240         i++;
 241
 242         names = TALLOC_ARRAY( mem_ctx, const char*, i );
 243         if ( !names ) {
 244                 DEBUG(0,("get_attr_list: out of memory\n"));
 245                 return NULL;
 246         }
 247
 248         i = 0;
 249         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
 250                 names[i] = talloc_strdup( names, table[i].name );
 251                 i++;
 252         }
 253         names[i] = NULL;
 254
 255         return names;
 256 }
 257
 258 /*******************************************************************
 259  Search an attribute and return the first value found.
 260 ******************************************************************/
 261
 262  bool smbldap_get_single_attribute (LDAP * ldap_struct, LDAPMessage * entry,
 263                                     const char *attribute, char *value,
 264                                     int max_len)
 265 {
 266         char **values;
 267
 268         if ( !attribute )
 269                 return False;
 270
 271         value[0] = '\0';
 272
 273         if ((values = ldap_get_values (ldap_struct, entry, attribute)) == NULL) {
 274                 DEBUG (10, ("smbldap_get_single_attribute: [%s] = [<does not exist>]\n", attribute));
 275
 276                 return False;
 277         }
 278
 279         if (convert_string(CH_UTF8, CH_UNIX,values[0], -1, value, max_len, False) == (size_t)-1) {
 280                 DEBUG(1, ("smbldap_get_single_attribute: string conversion of [%s] = [%s] failed!\n",
 281                           attribute, values[0]));
 282                 ldap_value_free(values);
 283                 return False;
 284         }
 285
 286         ldap_value_free(values);
 287 #ifdef DEBUG_PASSWORDS
 288         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n", attribute, value));
 289 #endif
 290         return True;
 291 }
 292
 293  char * smbldap_talloc_single_attribute(LDAP *ldap_struct, LDAPMessage *entry,
 294                                         const char *attribute,
 295                                         TALLOC_CTX *mem_ctx)
 296 {
 297         char **values;
 298         char *result;
 299         size_t converted_size;
 300
 301         if (attribute == NULL) {
 302                 return NULL;
 303         }
 304
 305         values = ldap_get_values(ldap_struct, entry, attribute);
 306
 307         if (values == NULL) {
 308                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 309                 return NULL;
 310         }
 311
 312         if (ldap_count_values(values) != 1) {
 313                 DEBUG(10, ("attribute %s has %d values, expected only one\n",
 314                            attribute, ldap_count_values(values)));
 315                 ldap_value_free(values);
 316                 return NULL;
 317         }
 318
 319         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
 320                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 321                 ldap_value_free(values);
 322                 return NULL;
 323         }
 324
 325         ldap_value_free(values);
 326
 327 #ifdef DEBUG_PASSWORDS
 328         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
 329                      attribute, result));
 330 #endif
 331         return result;
 332 }
 333
 334  char * smbldap_talloc_first_attribute(LDAP *ldap_struct, LDAPMessage *entry,
 335                                        const char *attribute,
 336                                        TALLOC_CTX *mem_ctx)
 337 {
 338         char **values;
 339         char *result;
 340         size_t converted_size;
 341
 342         if (attribute == NULL) {
 343                 return NULL;
 344         }
 345
 346         values = ldap_get_values(ldap_struct, entry, attribute);
 347
 348         if (values == NULL) {
 349                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 350                 return NULL;
 351         }
 352
 353         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
 354                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 355                 ldap_value_free(values);
 356                 return NULL;
 357         }
 358
 359         ldap_value_free(values);
 360
 361 #ifdef DEBUG_PASSWORDS
 362         DEBUG (100, ("smbldap_get_first_attribute: [%s] = [%s]\n",
 363                      attribute, result));
 364 #endif
 365         return result;
 366 }
 367
 368  char * smbldap_talloc_smallest_attribute(LDAP *ldap_struct, LDAPMessage *entry,
 369                                           const char *attribute,
 370                                           TALLOC_CTX *mem_ctx)
 371 {
 372         char **values;
 373         char *result;
 374         size_t converted_size;
 375         int i, num_values;
 376
 377         if (attribute == NULL) {
 378                 return NULL;
 379         }
 380
 381         values = ldap_get_values(ldap_struct, entry, attribute);
 382
 383         if (values == NULL) {
 384                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 385                 return NULL;
 386         }
 387
 388         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
 389                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 390                 ldap_value_free(values);
 391                 return NULL;
 392         }
 393
 394         num_values = ldap_count_values(values);
 395
 396         for (i=1; i<num_values; i++) {
 397                 char *tmp;
 398
 399                 if (!pull_utf8_talloc(mem_ctx, &tmp, values[i],
 400                                       &converted_size)) {
 401                         DEBUG(10, ("pull_utf8_talloc failed\n"));
 402                         TALLOC_FREE(result);
 403                         ldap_value_free(values);
 404                         return NULL;
 405                 }
 406
 407                 if (StrCaseCmp(tmp, result) < 0) {
 408                         TALLOC_FREE(result);
 409                         result = tmp;
 410                 } else {
 411                         TALLOC_FREE(tmp);
 412                 }
 413         }
 414
 415         ldap_value_free(values);
 416
 417 #ifdef DEBUG_PASSWORDS
 418         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
 419                      attribute, result));
 420 #endif
 421         return result;
 422 }
 423
 424  bool smbldap_talloc_single_blob(TALLOC_CTX *mem_ctx, LDAP *ld,
 425                                  LDAPMessage *msg, const char *attrib,
 426                                  DATA_BLOB *blob)
 427 {
 428         struct berval **values;
 429
 430         values = ldap_get_values_len(ld, msg, attrib);
 431         if (!values) {
 432                 return false;
 433         }
 434
 435         if (ldap_count_values_len(values) != 1) {
 436                 DEBUG(10, ("Expected one value for %s, got %d\n", attrib,
 437                            ldap_count_values_len(values)));
 438                 return false;
 439         }
 440
 441         *blob = data_blob_talloc(mem_ctx, values[0]->bv_val,
 442                                  values[0]->bv_len);
 443         ldap_value_free_len(values);
 444
 445         return (blob->data != NULL);
 446 }
 447
 448  bool smbldap_pull_sid(LDAP *ld, LDAPMessage *msg, const char *attrib,
 449                        struct dom_sid *sid)
 450 {
 451         DATA_BLOB blob;
 452         bool ret;
 453
 454         if (!smbldap_talloc_single_blob(talloc_tos(), ld, msg, attrib,
 455                                         &blob)) {
 456                 return false;
 457         }
 458         ret = sid_parse((char *)blob.data, blob.length, sid);
 459         TALLOC_FREE(blob.data);
 460         return ret;
 461 }
 462
 463  static int ldapmsg_destructor(LDAPMessage **result) {
 464         ldap_msgfree(*result);
 465         return 0;
 466 }
 467
 468  void talloc_autofree_ldapmsg(TALLOC_CTX *mem_ctx, LDAPMessage *result)
 469 {
 470         LDAPMessage **handle;
 471
 472         if (result == NULL) {
 473                 return;
 474         }
 475
 476         handle = TALLOC_P(mem_ctx, LDAPMessage *);
 477         SMB_ASSERT(handle != NULL);
 478
 479         *handle = result;
 480         talloc_set_destructor(handle, ldapmsg_destructor);
 481 }
 482
 483  static int ldapmod_destructor(LDAPMod ***mod) {
 484         ldap_mods_free(*mod, True);
 485         return 0;
 486 }
 487
 488  void talloc_autofree_ldapmod(TALLOC_CTX *mem_ctx, LDAPMod **mod)
 489 {
 490         LDAPMod ***handle;
 491
 492         if (mod == NULL) {
 493                 return;
 494         }
 495
 496         handle = TALLOC_P(mem_ctx, LDAPMod **);
 497         SMB_ASSERT(handle != NULL);
 498
 499         *handle = mod;
 500         talloc_set_destructor(handle, ldapmod_destructor);
 501 }
 502
 503 /************************************************************************
 504  Routine to manage the LDAPMod structure array
 505  manage memory used by the array, by each struct, and values
 506  ***********************************************************************/
 507
 508  void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
 509 {
 510         LDAPMod **mods;
 511         int i;
 512         int j;
 513
 514         mods = *modlist;
 515
 516         /* sanity checks on the mod values */
 517
 518         if (attribute == NULL || *attribute == '\0') {
 519                 return;
 520         }
 521
 522 #if 0   /* commented out after discussion with abartlet.  Do not reenable.
 523            left here so other do not re-add similar code   --jerry */
 524         if (value == NULL || *value == '\0')
 525                 return;
 526 #endif
 527
 528         if (mods == NULL) {
 529                 mods = SMB_MALLOC_P(LDAPMod *);
 530                 if (mods == NULL) {
 531                         smb_panic("smbldap_set_mod: out of memory!");
 532                         /* notreached. */
 533                 }
 534                 mods[0] = NULL;
 535         }
 536
 537         for (i = 0; mods[i] != NULL; ++i) {
 538                 if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
 539                         break;
 540         }
 541
 542         if (mods[i] == NULL) {
 543                 mods = SMB_REALLOC_ARRAY (mods, LDAPMod *, i + 2);
 544                 if (mods == NULL) {
 545                         smb_panic("smbldap_set_mod: out of memory!");
 546                         /* notreached. */
 547                 }
 548                 mods[i] = SMB_MALLOC_P(LDAPMod);
 549                 if (mods[i] == NULL) {
 550                         smb_panic("smbldap_set_mod: out of memory!");
 551                         /* notreached. */
 552                 }
 553                 mods[i]->mod_op = modop;
 554                 mods[i]->mod_values = NULL;
 555                 mods[i]->mod_type = SMB_STRDUP(attribute);
 556                 mods[i + 1] = NULL;
 557         }
 558
 559         if (value != NULL) {
 560                 char *utf8_value = NULL;
 561                 size_t converted_size;
 562
 563                 j = 0;
 564                 if (mods[i]->mod_values != NULL) {
 565                         for (; mods[i]->mod_values[j] != NULL; j++);
 566                 }
 567                 mods[i]->mod_values = SMB_REALLOC_ARRAY(mods[i]->mod_values, char *, j + 2);
 568
 569                 if (mods[i]->mod_values == NULL) {
 570                         smb_panic("smbldap_set_mod: out of memory!");
 571                         /* notreached. */
 572                 }
 573
 574                 if (!push_utf8_talloc(talloc_tos(), &utf8_value, value, &converted_size)) {
 575                         smb_panic("smbldap_set_mod: String conversion failure!");
 576                         /* notreached. */
 577                 }
 578
 579                 mods[i]->mod_values[j] = SMB_STRDUP(utf8_value);
 580                 TALLOC_FREE(utf8_value);
 581                 SMB_ASSERT(mods[i]->mod_values[j] != NULL);
 582
 583                 mods[i]->mod_values[j + 1] = NULL;
 584         }
 585         *modlist = mods;
 586 }
 587
 588 /**********************************************************************
 589   Set attribute to newval in LDAP, regardless of what value the
 590   attribute had in LDAP before.
 591 *********************************************************************/
 592
 593  void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
 594                       LDAPMod ***mods,
 595                       const char *attribute, const char *newval)
 596 {
 597         char oldval[2048]; /* current largest allowed value is mungeddial */
 598         bool existed;
 599
 600         if (attribute == NULL) {
 601                 /* This can actually happen for ldapsam_compat where we for
 602                  * example don't have a password history */
 603                 return;
 604         }
 605
 606         if (existing != NULL) {
 607                 existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
 608         } else {
 609                 existed = False;
 610                 *oldval = '\0';
 611         }
 612
 613         /* all of our string attributes are case insensitive */
 614
 615         if (existed && newval && (StrCaseCmp(oldval, newval) == 0)) {
 616
 617                 /* Believe it or not, but LDAP will deny a delete and
 618                    an add at the same time if the values are the
 619                    same... */
 620                 DEBUG(10,("smbldap_make_mod: attribute |%s| not changed.\n", attribute));
 621                 return;
 622         }
 623
 624         if (existed) {
 625                 /* There has been no value before, so don't delete it.
 626                  * Here's a possible race: We might end up with
 627                  * duplicate attributes */
 628                 /* By deleting exactly the value we found in the entry this
 629                  * should be race-free in the sense that the LDAP-Server will
 630                  * deny the complete operation if somebody changed the
 631                  * attribute behind our back. */
 632                 /* This will also allow modifying single valued attributes
 633                  * in Novell NDS. In NDS you have to first remove attribute and then
 634                  * you could add new value */
 635
 636                 DEBUG(10,("smbldap_make_mod: deleting attribute |%s| values |%s|\n", attribute, oldval));
 637                 smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
 638         }
 639
 640         /* Regardless of the real operation (add or modify)
 641            we add the new value here. We rely on deleting
 642            the old value, should it exist. */
 643
 644         if ((newval != NULL) && (strlen(newval) > 0)) {
 645                 DEBUG(10,("smbldap_make_mod: adding attribute |%s| value |%s|\n", attribute, newval));
 646                 smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
 647         }
 648 }
 649
 650 /**********************************************************************
 651  Some varients of the LDAP rebind code do not pass in the third 'arg'
 652  pointer to a void*, so we try and work around it by assuming that the
 653  value of the 'LDAP *' pointer is the same as the one we had passed in
 654  **********************************************************************/
 655
 656 struct smbldap_state_lookup {
 657         LDAP *ld;
 658         struct smbldap_state *smbldap_state;
 659         struct smbldap_state_lookup *prev, *next;
 660 };
 661
 662 static struct smbldap_state_lookup *smbldap_state_lookup_list;
 663
 664 static struct smbldap_state *smbldap_find_state(LDAP *ld)
 665 {
 666         struct smbldap_state_lookup *t;
 667
 668         for (t = smbldap_state_lookup_list; t; t = t->next) {
 669                 if (t->ld == ld) {
 670                         return t->smbldap_state;
 671                 }
 672         }
 673         return NULL;
 674 }
 675
 676 static void smbldap_delete_state(struct smbldap_state *smbldap_state)
 677 {
 678         struct smbldap_state_lookup *t;
 679
 680         for (t = smbldap_state_lookup_list; t; t = t->next) {
 681                 if (t->smbldap_state == smbldap_state) {
 682                         DLIST_REMOVE(smbldap_state_lookup_list, t);
 683                         SAFE_FREE(t);
 684                         return;
 685                 }
 686         }
 687 }
 688
 689 static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state)
 690 {
 691         struct smbldap_state *tmp_ldap_state;
 692         struct smbldap_state_lookup *t;
 693
 694         if ((tmp_ldap_state = smbldap_find_state(ld))) {
 695                 SMB_ASSERT(tmp_ldap_state == smbldap_state);
 696                 return;
 697         }
 698
 699         t = SMB_XMALLOC_P(struct smbldap_state_lookup);
 700         ZERO_STRUCTP(t);
 701
 702         DLIST_ADD_END(smbldap_state_lookup_list, t, struct smbldap_state_lookup *);
 703         t->ld = ld;
 704         t->smbldap_state = smbldap_state;
 705 }
 706
 707 /********************************************************************
 708  start TLS on an existing LDAP connection
 709 *******************************************************************/
 710
 711 int smb_ldap_start_tls(LDAP *ldap_struct, int version)
 712 {
 713 #ifdef LDAP_OPT_X_TLS
 714         int rc;
 715 #endif
 716
 717         if (lp_ldap_ssl() != LDAP_SSL_START_TLS) {
 718                 return LDAP_SUCCESS;
 719         }
 720
 721 #ifdef LDAP_OPT_X_TLS
 722         if (version != LDAP_VERSION3) {
 723                 DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
 724                 return LDAP_OPERATIONS_ERROR;
 725         }
 726
 727         if ((rc = ldap_start_tls_s (ldap_struct, NULL, NULL)) != LDAP_SUCCESS)  {
 728                 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
 729                          ldap_err2string(rc)));
 730                 return rc;
 731         }
 732
 733         DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
 734         return LDAP_SUCCESS;
 735 #else
 736         DEBUG(0,("StartTLS not supported by LDAP client libraries!\n"));
 737         return LDAP_OPERATIONS_ERROR;
 738 #endif
 739 }
 740
 741 /********************************************************************
 742  setup a connection to the LDAP server based on a uri
 743 *******************************************************************/
 744
 745 static int smb_ldap_setup_conn(LDAP **ldap_struct, const char *uri)
 746 {
 747         int rc;
 748
 749         DEBUG(10, ("smb_ldap_setup_connection: %s\n", uri));
 750
 751 #ifdef HAVE_LDAP_INITIALIZE
 752
 753         rc = ldap_initialize(ldap_struct, uri);
 754         if (rc) {
 755                 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
 756                 return rc;
 757         }
 758
 759         if (lp_ldap_follow_referral() != Auto) {
 760                 rc = ldap_set_option(*ldap_struct, LDAP_OPT_REFERRALS,
 761                      lp_ldap_follow_referral() ? LDAP_OPT_ON : LDAP_OPT_OFF);
 762                 if (rc != LDAP_SUCCESS)
 763                         DEBUG(0, ("Failed to set LDAP_OPT_REFERRALS: %s\n",
 764                                 ldap_err2string(rc)));
 765         }
 766
 767         return LDAP_SUCCESS;
 768 #else
 769
 770         /* Parse the string manually */
 771
 772         {
 773                 int port = 0;
 774                 fstring protocol;
 775                 fstring host;
 776                 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
 777
 778
 779                 /* skip leading "URL:" (if any) */
 780                 if ( strnequal( uri, "URL:", 4 ) ) {
 781                         uri += 4;
 782                 }
 783
 784                 sscanf(uri, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
 785
 786                 if (port == 0) {
 787                         if (strequal(protocol, "ldap")) {
 788                                 port = LDAP_PORT;
 789                         } else if (strequal(protocol, "ldaps")) {
 790                                 port = LDAPS_PORT;
 791                         } else {
 792                                 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
 793                         }
 794                 }
 795
 796                 if ((*ldap_struct = ldap_init(host, port)) == NULL)     {
 797                         DEBUG(0, ("ldap_init failed !\n"));
 798                         return LDAP_OPERATIONS_ERROR;
 799                 }
 800
 801                 if (strequal(protocol, "ldaps")) {
 802 #ifdef LDAP_OPT_X_TLS
 803                         int tls = LDAP_OPT_X_TLS_HARD;
 804                         if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
 805                         {
 806                                 DEBUG(0, ("Failed to setup a TLS session\n"));
 807                         }
 808
 809                         DEBUG(3,("LDAPS option set...!\n"));
 810 #else
 811                         DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
 812                         return LDAP_OPERATIONS_ERROR;
 813 #endif /* LDAP_OPT_X_TLS */
 814                 }
 815         }
 816 #endif /* HAVE_LDAP_INITIALIZE */
 817
 818         /* now set connection timeout */
 819 #ifdef LDAP_X_OPT_CONNECT_TIMEOUT /* Netscape */
 820         {
 821                 int ct = lp_ldap_connection_timeout()*1000;
 822                 rc = ldap_set_option(*ldap_struct, LDAP_X_OPT_CONNECT_TIMEOUT, &ct);
 823                 if (rc != LDAP_SUCCESS) {
 824                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
 825                                 ct, ldap_err2string(rc)));
 826                 }
 827         }
 828 #elif defined (LDAP_OPT_NETWORK_TIMEOUT) /* OpenLDAP */
 829         {
 830                 struct timeval ct;
 831                 ct.tv_usec = 0;
 832                 ct.tv_sec = lp_ldap_connection_timeout();
 833                 rc = ldap_set_option(*ldap_struct, LDAP_OPT_NETWORK_TIMEOUT, &ct);
 834                 if (rc != LDAP_SUCCESS) {
 835                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
 836                                 (int)ct.tv_sec, ldap_err2string(rc)));
 837                 }
 838         }
 839 #endif
 840
 841         return LDAP_SUCCESS;
 842 }
 843
 844 /********************************************************************
 845  try to upgrade to Version 3 LDAP if not already, in either case return current
 846  version
 847  *******************************************************************/
 848
 849 static int smb_ldap_upgrade_conn(LDAP *ldap_struct, int *new_version)
 850 {
 851         int version;
 852         int rc;
 853
 854         /* assume the worst */
 855         *new_version = LDAP_VERSION2;
 856
 857         rc = ldap_get_option(ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 858         if (rc) {
 859                 return rc;
 860         }
 861
 862         if (version == LDAP_VERSION3) {
 863                 *new_version = LDAP_VERSION3;
 864                 return LDAP_SUCCESS;
 865         }
 866
 867         /* try upgrade */
 868         version = LDAP_VERSION3;
 869         rc = ldap_set_option (ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 870         if (rc) {
 871                 return rc;
 872         }
 873
 874         *new_version = LDAP_VERSION3;
 875         return LDAP_SUCCESS;
 876 }
 877
 878 /*******************************************************************
 879  open a connection to the ldap server (just until the bind)
 880  ******************************************************************/
 881
 882 int smb_ldap_setup_full_conn(LDAP **ldap_struct, const char *uri)
 883 {
 884         int rc, version;
 885
 886         rc = smb_ldap_setup_conn(ldap_struct, uri);
 887         if (rc) {
 888                 return rc;
 889         }
 890
 891         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 892         if (rc) {
 893                 return rc;
 894         }
 895
 896         rc = smb_ldap_start_tls(*ldap_struct, version);
 897         if (rc) {
 898                 return rc;
 899         }
 900
 901         return LDAP_SUCCESS;
 902 }
 903
 904 /*******************************************************************
 905  open a connection to the ldap server.
 906 ******************************************************************/
 907 static int smbldap_open_connection (struct smbldap_state *ldap_state)
 908
 909 {
 910         int rc = LDAP_SUCCESS;
 911         int version;
 912         int deref;
 913         LDAP **ldap_struct = &ldap_state->ldap_struct;
 914
 915         rc = smb_ldap_setup_conn(ldap_struct, ldap_state->uri);
 916         if (rc) {
 917                 return rc;
 918         }
 919
 920         /* Store the LDAP pointer in a lookup list */
 921
 922         smbldap_store_state(*ldap_struct, ldap_state);
 923
 924         /* Upgrade to LDAPv3 if possible */
 925
 926         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 927         if (rc) {
 928                 return rc;
 929         }
 930
 931         /* Start TLS if required */
 932
 933         rc = smb_ldap_start_tls(*ldap_struct, version);
 934         if (rc) {
 935                 return rc;
 936         }
 937
 938         /* Set alias dereferencing method */
 939         deref = lp_ldap_deref();
 940         if (deref != -1) {
 941                 if (ldap_set_option (*ldap_struct, LDAP_OPT_DEREF, &deref) != LDAP_OPT_SUCCESS) {
 942                         DEBUG(1,("smbldap_open_connection: Failed to set dereferencing method: %d\n", deref));
 943                 } else {
 944                         DEBUG(5,("Set dereferencing method: %d\n", deref));
 945                 }
 946         }
 947
 948         DEBUG(2, ("smbldap_open_connection: connection opened\n"));
 949         return rc;
 950 }
 951
 952 /*******************************************************************
 953  a rebind function for authenticated referrals
 954  This version takes a void* that we can shove useful stuff in :-)
 955 ******************************************************************/
 956 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 957 #else
 958 static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp,
 959                                    int *methodp, int freeit, void *arg)
 960 {
 961         struct smbldap_state *ldap_state = arg;
 962         struct timespec ts;
 963
 964         /** @TODO Should we be doing something to check what servers we rebind to?
 965             Could we get a referral to a machine that we don't want to give our
 966             username and password to? */
 967
 968         if (freeit) {
 969                 SAFE_FREE(*whop);
 970                 if (*credp) {
 971                         memset(*credp, '\0', strlen(*credp));
 972                 }
 973                 SAFE_FREE(*credp);
 974         } else {
 975                 DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n",
 976                           ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
 977
 978                 if (ldap_state->anonymous) {
 979                         *whop = NULL;
 980                         *credp = NULL;
 981                 } else {
 982                         *whop = SMB_STRDUP(ldap_state->bind_dn);
 983                         if (!*whop) {
 984                                 return LDAP_NO_MEMORY;
 985                         }
 986                         *credp = SMB_STRDUP(ldap_state->bind_secret);
 987                         if (!*credp) {
 988                                 SAFE_FREE(*whop);
 989                                 return LDAP_NO_MEMORY;
 990                         }
 991                 }
 992                 *methodp = LDAP_AUTH_SIMPLE;
 993         }
 994
 995         clock_gettime_mono(&ts);
 996         ldap_state->last_rebind = convert_timespec_to_timeval(ts);
 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         struct timespec ts;
1017         int version;
1018
1019         DEBUG(5,("rebindproc_connect_with_state: Rebinding to %s as \"%s\"\n",
1020                  url, ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
1021
1022         /* call START_TLS again (ldaps:// is handled by the OpenLDAP library
1023          * itself) before rebinding to another LDAP server to avoid to expose
1024          * our credentials. At least *try* to secure the connection - Guenther */
1025
1026         smb_ldap_upgrade_conn(ldap_struct, &version);
1027         smb_ldap_start_tls(ldap_struct, version);
1028
1029         /** @TODO Should we be doing something to check what servers we rebind to?
1030             Could we get a referral to a machine that we don't want to give our
1031             username and password to? */
1032
1033         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
1034
1035         /* only set the last rebind timestamp when we did rebind after a
1036          * non-read LDAP operation. That way we avoid the replication sleep
1037          * after a simple redirected search operation - Guenther */
1038
1039         switch (request) {
1040
1041                 case LDAP_REQ_MODIFY:
1042                 case LDAP_REQ_ADD:
1043                 case LDAP_REQ_DELETE:
1044                 case LDAP_REQ_MODDN:
1045                 case LDAP_REQ_EXTENDED:
1046                         DEBUG(10,("rebindproc_connect_with_state: "
1047                                 "setting last_rebind timestamp "
1048                                 "(req: 0x%02x)\n", (unsigned int)request));
1049                         clock_gettime_mono(&ts);
1050                         ldap_state->last_rebind = convert_timespec_to_timeval(ts);
1051                         break;
1052                 default:
1053                         ZERO_STRUCT(ldap_state->last_rebind);
1054                         break;
1055         }
1056
1057         return rc;
1058 }
1059 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1060
1061 /*******************************************************************
1062  Add a rebind function for authenticated referrals
1063 ******************************************************************/
1064 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1065 #else
1066 # if LDAP_SET_REBIND_PROC_ARGS == 2
1067 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
1068                        int *method, int freeit )
1069 {
1070         struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
1071
1072         return rebindproc_with_state(ldap_struct, whop, credp,
1073                                      method, freeit, ldap_state);
1074 }
1075 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
1076 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1077
1078 /*******************************************************************
1079  a rebind function for authenticated referrals
1080  this also does the connection, but no void*.
1081 ******************************************************************/
1082 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1083 # if LDAP_SET_REBIND_PROC_ARGS == 2
1084 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
1085                                ber_int_t msgid)
1086 {
1087         struct smbldap_state *ldap_state = smbldap_find_state(ld);
1088
1089         return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid,
1090                                              ldap_state);
1091 }
1092 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
1093 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1094
1095 /*******************************************************************
1096  connect to the ldap server under system privilege.
1097 ******************************************************************/
1098 static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_struct)
1099 {
1100         int rc;
1101         int version;
1102
1103         if (!ldap_state->anonymous && !ldap_state->bind_dn) {
1104                 char *bind_dn = NULL;
1105                 char *bind_secret = NULL;
1106
1107                 /* get the default dn and password only if they are not set already */
1108                 if (!fetch_ldap_pw(&bind_dn, &bind_secret)) {
1109                         DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
1110                         return LDAP_INVALID_CREDENTIALS;
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                 return rc;
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         return rc;
1172 }
1173
1174 static void smbldap_idle_fn(struct event_context *event_ctx,
1175                             struct timed_event *te,
1176                             struct timeval now_abs,
1177                             void *private_data);
1178
1179 /**********************************************************************
1180  Connect to LDAP server (called before every ldap operation)
1181 *********************************************************************/
1182 static int smbldap_open(struct smbldap_state *ldap_state)
1183 {
1184         int rc, opt_rc;
1185         bool reopen = False;
1186         SMB_ASSERT(ldap_state);
1187
1188         if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time_mono(NULL))) {
1189
1190 #ifdef HAVE_UNIXSOCKET
1191                 struct sockaddr_un addr;
1192 #else
1193                 struct sockaddr addr;
1194 #endif
1195                 socklen_t len = sizeof(addr);
1196                 int sd;
1197
1198                 opt_rc = ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd);
1199                 if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 )
1200                         reopen = True;
1201
1202 #ifdef HAVE_UNIXSOCKET
1203                 if (opt_rc == 0 && addr.sun_family == AF_UNIX)
1204                         reopen = True;
1205 #endif
1206                 if (reopen) {
1207                         /* the other end has died. reopen. */
1208                         ldap_unbind(ldap_state->ldap_struct);
1209                         ldap_state->ldap_struct = NULL;
1210                         ldap_state->last_ping = (time_t)0;
1211                 } else {
1212                         ldap_state->last_ping = time_mono(NULL);
1213                 }
1214         }
1215
1216         if (ldap_state->ldap_struct != NULL) {
1217                 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
1218                 return LDAP_SUCCESS;
1219         }
1220
1221         if ((rc = smbldap_open_connection(ldap_state))) {
1222                 return rc;
1223         }
1224
1225         if ((rc = smbldap_connect_system(ldap_state, ldap_state->ldap_struct))) {
1226                 ldap_unbind(ldap_state->ldap_struct);
1227                 ldap_state->ldap_struct = NULL;
1228                 return rc;
1229         }
1230
1231
1232         ldap_state->last_ping = time_mono(NULL);
1233         ldap_state->pid = sys_getpid();
1234
1235         TALLOC_FREE(ldap_state->idle_event);
1236
1237         if (ldap_state->event_context != NULL) {
1238                 ldap_state->idle_event = event_add_timed(
1239                         ldap_state->event_context, NULL,
1240                         timeval_current_ofs(SMBLDAP_IDLE_TIME, 0),
1241                         smbldap_idle_fn, ldap_state);
1242         }
1243
1244         DEBUG(4,("The LDAP server is successfully connected\n"));
1245
1246         return LDAP_SUCCESS;
1247 }
1248
1249 /**********************************************************************
1250 Disconnect from LDAP server
1251 *********************************************************************/
1252 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
1253 {
1254         if (!ldap_state)
1255                 return NT_STATUS_INVALID_PARAMETER;
1256
1257         if (ldap_state->ldap_struct != NULL) {
1258                 ldap_unbind(ldap_state->ldap_struct);
1259                 ldap_state->ldap_struct = NULL;
1260         }
1261
1262         smbldap_delete_state(ldap_state);
1263
1264         DEBUG(5,("The connection to the LDAP server was closed\n"));
1265         /* maybe free the results here --metze */
1266
1267         return NT_STATUS_OK;
1268 }
1269
1270 static bool got_alarm;
1271
1272 static void (*old_handler)(int);
1273
1274 static void gotalarm_sig(int dummy)
1275 {
1276         got_alarm = True;
1277 }
1278
1279 static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
1280                             int *attempts, time_t endtime)
1281 {
1282         time_t now = time_mono(NULL);
1283         int open_rc = LDAP_SERVER_DOWN;
1284
1285         if (*rc != LDAP_SERVER_DOWN)
1286                 goto no_next;
1287
1288         if (now >= endtime) {
1289                 smbldap_close(ldap_state);
1290                 *rc = LDAP_TIMEOUT;
1291                 goto no_next;
1292         }
1293
1294         if (*attempts == 0) {
1295                 got_alarm = False;
1296                 old_handler = CatchSignal(SIGALRM, gotalarm_sig);
1297                 alarm(endtime - now);
1298
1299                 if (ldap_state->pid != sys_getpid())
1300                         smbldap_close(ldap_state);
1301         }
1302
1303         while (1) {
1304
1305                 if (*attempts != 0)
1306                         smb_msleep(1000);
1307
1308                 *attempts += 1;
1309
1310                 open_rc = smbldap_open(ldap_state);
1311
1312                 if (open_rc == LDAP_SUCCESS) {
1313                         ldap_state->last_use = now;
1314                         return True;
1315                 }
1316
1317                 if (open_rc == LDAP_INSUFFICIENT_ACCESS) {
1318                         /* The fact that we are non-root or any other
1319                          * access-denied condition will not change in the next
1320                          * round of trying */
1321                         *rc = open_rc;
1322                         break;
1323                 }
1324
1325                 if (got_alarm) {
1326                         *rc = LDAP_TIMEOUT;
1327                         break;
1328                 }
1329
1330                 if (open_rc != LDAP_SUCCESS) {
1331                         DEBUG(1, ("Connection to LDAP server failed for the "
1332                                   "%d try!\n", *attempts));
1333                 }
1334         }
1335
1336  no_next:
1337         CatchSignal(SIGALRM, old_handler);
1338         alarm(0);
1339         ldap_state->last_use = now;
1340         return False;
1341 }
1342
1343 /*********************************************************************
1344  ********************************************************************/
1345
1346 static int smbldap_search_ext(struct smbldap_state *ldap_state,
1347                               const char *base, int scope, const char *filter,
1348                               const char *attrs[], int attrsonly,
1349                               LDAPControl **sctrls, LDAPControl **cctrls,
1350                               int sizelimit, LDAPMessage **res)
1351 {
1352         int             rc = LDAP_SERVER_DOWN;
1353         int             attempts = 0;
1354         char           *utf8_filter;
1355         time_t          endtime = time_mono(NULL)+lp_ldap_timeout();
1356         struct          timeval timeout;
1357         size_t          converted_size;
1358
1359         SMB_ASSERT(ldap_state);
1360
1361         DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], "
1362                  "scope => [%d]\n", base, filter, scope));
1363
1364         if (ldap_state->last_rebind.tv_sec > 0) {
1365                 struct timeval  tval;
1366                 struct timespec ts;
1367                 int64_t tdiff = 0;
1368                 int             sleep_time = 0;
1369
1370                 clock_gettime_mono(&ts);
1371                 tval = convert_timespec_to_timeval(ts);
1372
1373                 tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
1374                 tdiff /= 1000; /* Convert to milliseconds. */
1375
1376                 sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
1377                 sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
1378
1379                 if (sleep_time > 0) {
1380                         /* we wait for the LDAP replication */
1381                         DEBUG(5,("smbldap_search_ext: waiting %d milliseconds "
1382                                  "for LDAP replication.\n",sleep_time));
1383                         smb_msleep(sleep_time);
1384                         DEBUG(5,("smbldap_search_ext: go on!\n"));
1385                 }
1386                 ZERO_STRUCT(ldap_state->last_rebind);
1387         }
1388
1389         if (!push_utf8_talloc(talloc_tos(), &utf8_filter, filter, &converted_size)) {
1390                 return LDAP_NO_MEMORY;
1391         }
1392
1393         /* Setup timeout for the ldap_search_ext_s call - local and remote. */
1394         timeout.tv_sec = lp_ldap_timeout();
1395         timeout.tv_usec = 0;
1396
1397         /* Setup alarm timeout.... Do we need both of these ? JRA.
1398          * Yes, I think we do need both of these. The server timeout only
1399          * covers the case where the server's operation takes too long. It
1400          * does not cover the case where the request hangs on its way to the
1401          * server. The server side timeout is not strictly necessary, it's
1402          * just a bit more kind to the server. VL. */
1403
1404         got_alarm = 0;
1405         CatchSignal(SIGALRM, gotalarm_sig);
1406         alarm(lp_ldap_timeout());
1407         /* End setup timeout. */
1408
1409         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1410                 rc = ldap_search_ext_s(ldap_state->ldap_struct, base, scope,
1411                                        utf8_filter,
1412                                        CONST_DISCARD(char **, attrs),
1413                                        attrsonly, sctrls, cctrls, &timeout,
1414                                        sizelimit, res);
1415                 if (rc != LDAP_SUCCESS) {
1416                         char *ld_error = NULL;
1417                         int ld_errno;
1418
1419                         ldap_get_option(ldap_state->ldap_struct,
1420                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1421
1422                         ldap_get_option(ldap_state->ldap_struct,
1423                                         LDAP_OPT_ERROR_STRING, &ld_error);
1424                         DEBUG(10, ("Failed search for base: %s, error: %d (%s) "
1425                                    "(%s)\n", base, ld_errno,
1426                                    ldap_err2string(rc),
1427                                    ld_error ? ld_error : "unknown"));
1428                         SAFE_FREE(ld_error);
1429
1430                         if (ld_errno == LDAP_SERVER_DOWN) {
1431                                 ldap_unbind(ldap_state->ldap_struct);
1432                                 ldap_state->ldap_struct = NULL;
1433                         }
1434                 }
1435         }
1436
1437         TALLOC_FREE(utf8_filter);
1438
1439         /* Teardown timeout. */
1440         CatchSignal(SIGALRM, SIG_IGN);
1441         alarm(0);
1442
1443         if (got_alarm != 0)
1444                 return LDAP_TIMELIMIT_EXCEEDED;
1445
1446         return rc;
1447 }
1448
1449 int smbldap_search(struct smbldap_state *ldap_state,
1450                    const char *base, int scope, const char *filter,
1451                    const char *attrs[], int attrsonly,
1452                    LDAPMessage **res)
1453 {
1454         return smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1455                                   attrsonly, NULL, NULL, LDAP_NO_LIMIT, res);
1456 }
1457
1458 int smbldap_search_paged(struct smbldap_state *ldap_state,
1459                          const char *base, int scope, const char *filter,
1460                          const char **attrs, int attrsonly, int pagesize,
1461                          LDAPMessage **res, void **cookie)
1462 {
1463         LDAPControl     pr;
1464         LDAPControl     **rcontrols;
1465         LDAPControl     *controls[2] = { NULL, NULL};
1466         BerElement      *cookie_be = NULL;
1467         struct berval   *cookie_bv = NULL;
1468         int             tmp = 0, i, rc;
1469         bool            critical = True;
1470
1471         *res = NULL;
1472
1473         DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s],"
1474                  "scope => [%d], pagesize => [%d]\n",
1475                  base, filter, scope, pagesize));
1476
1477         cookie_be = ber_alloc_t(LBER_USE_DER);
1478         if (cookie_be == NULL) {
1479                 DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns "
1480                          "NULL\n"));
1481                 return LDAP_NO_MEMORY;
1482         }
1483
1484         /* construct cookie */
1485         if (*cookie != NULL) {
1486                 ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie);
1487                 ber_bvfree((struct berval *)*cookie); /* don't need it from last time */
1488                 *cookie = NULL;
1489         } else {
1490                 ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0);
1491         }
1492         ber_flatten(cookie_be, &cookie_bv);
1493
1494         pr.ldctl_oid = CONST_DISCARD(char *, ADS_PAGE_CTL_OID);
1495         pr.ldctl_iscritical = (char) critical;
1496         pr.ldctl_value.bv_len = cookie_bv->bv_len;
1497         pr.ldctl_value.bv_val = cookie_bv->bv_val;
1498
1499         controls[0] = &pr;
1500         controls[1] = NULL;
1501
1502         rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1503                                  0, controls, NULL, LDAP_NO_LIMIT, res);
1504
1505         ber_free(cookie_be, 1);
1506         ber_bvfree(cookie_bv);
1507
1508         if (rc != 0) {
1509                 DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) "
1510                          "failed with [%s]\n", filter, ldap_err2string(rc)));
1511                 goto done;
1512         }
1513
1514         DEBUG(3,("smbldap_search_paged: search was successful\n"));
1515
1516         rc = ldap_parse_result(ldap_state->ldap_struct, *res, NULL, NULL,
1517                                NULL, NULL, &rcontrols,  0);
1518         if (rc != 0) {
1519                 DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \
1520                          "with [%s]\n", ldap_err2string(rc)));
1521                 goto done;
1522         }
1523
1524         if (rcontrols == NULL)
1525                 goto done;
1526
1527         for (i=0; rcontrols[i]; i++) {
1528
1529                 if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0)
1530                         continue;
1531
1532                 cookie_be = ber_init(&rcontrols[i]->ldctl_value);
1533                 ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv);
1534                 /* the berval is the cookie, but must be freed when it is all
1535                    done */
1536                 if (cookie_bv->bv_len)
1537                         *cookie=ber_bvdup(cookie_bv);
1538                 else
1539                         *cookie=NULL;
1540                 ber_bvfree(cookie_bv);
1541                 ber_free(cookie_be, 1);
1542                 break;
1543         }
1544         ldap_controls_free(rcontrols);
1545 done:
1546         return rc;
1547 }
1548
1549 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1550 {
1551         int             rc = LDAP_SERVER_DOWN;
1552         int             attempts = 0;
1553         char           *utf8_dn;
1554         time_t          endtime = time_mono(NULL)+lp_ldap_timeout();
1555         size_t          converted_size;
1556
1557         SMB_ASSERT(ldap_state);
1558
1559         DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1560
1561         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1562                 return LDAP_NO_MEMORY;
1563         }
1564
1565         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1566                 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1567                 if (rc != LDAP_SUCCESS) {
1568                         char *ld_error = NULL;
1569                         int ld_errno;
1570
1571                         ldap_get_option(ldap_state->ldap_struct,
1572                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1573
1574                         ldap_get_option(ldap_state->ldap_struct,
1575                                         LDAP_OPT_ERROR_STRING, &ld_error);
1576                         DEBUG(10, ("Failed to modify dn: %s, error: %d (%s) "
1577                                    "(%s)\n", dn, ld_errno,
1578                                    ldap_err2string(rc),
1579                                    ld_error ? ld_error : "unknown"));
1580                         SAFE_FREE(ld_error);
1581
1582                         if (ld_errno == LDAP_SERVER_DOWN) {
1583                                 ldap_unbind(ldap_state->ldap_struct);
1584                                 ldap_state->ldap_struct = NULL;
1585                         }
1586                 }
1587         }
1588
1589         TALLOC_FREE(utf8_dn);
1590         return rc;
1591 }
1592
1593 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1594 {
1595         int             rc = LDAP_SERVER_DOWN;
1596         int             attempts = 0;
1597         char           *utf8_dn;
1598         time_t          endtime = time_mono(NULL)+lp_ldap_timeout();
1599         size_t          converted_size;
1600
1601         SMB_ASSERT(ldap_state);
1602
1603         DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1604
1605         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1606                 return LDAP_NO_MEMORY;
1607         }
1608
1609         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1610                 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1611                 if (rc != LDAP_SUCCESS) {
1612                         char *ld_error = NULL;
1613                         int ld_errno;
1614
1615                         ldap_get_option(ldap_state->ldap_struct,
1616                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1617
1618                         ldap_get_option(ldap_state->ldap_struct,
1619                                         LDAP_OPT_ERROR_STRING, &ld_error);
1620                         DEBUG(10, ("Failed to add dn: %s, error: %d (%s) "
1621                                    "(%s)\n", dn, ld_errno,
1622                                    ldap_err2string(rc),
1623                                    ld_error ? ld_error : "unknown"));
1624                         SAFE_FREE(ld_error);
1625
1626                         if (ld_errno == LDAP_SERVER_DOWN) {
1627                                 ldap_unbind(ldap_state->ldap_struct);
1628                                 ldap_state->ldap_struct = NULL;
1629                         }
1630                 }
1631         }
1632
1633         TALLOC_FREE(utf8_dn);
1634         return rc;
1635 }
1636
1637 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1638 {
1639         int             rc = LDAP_SERVER_DOWN;
1640         int             attempts = 0;
1641         char           *utf8_dn;
1642         time_t          endtime = time_mono(NULL)+lp_ldap_timeout();
1643         size_t          converted_size;
1644
1645         SMB_ASSERT(ldap_state);
1646
1647         DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1648
1649         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1650                 return LDAP_NO_MEMORY;
1651         }
1652
1653         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1654                 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1655                 if (rc != LDAP_SUCCESS) {
1656                         char *ld_error = NULL;
1657                         int ld_errno;
1658
1659                         ldap_get_option(ldap_state->ldap_struct,
1660                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1661
1662                         ldap_get_option(ldap_state->ldap_struct,
1663                                         LDAP_OPT_ERROR_STRING, &ld_error);
1664                         DEBUG(10, ("Failed to delete dn: %s, error: %d (%s) "
1665                                    "(%s)\n", dn, ld_errno,
1666                                    ldap_err2string(rc),
1667                                    ld_error ? ld_error : "unknown"));
1668                         SAFE_FREE(ld_error);
1669
1670                         if (ld_errno == LDAP_SERVER_DOWN) {
1671                                 ldap_unbind(ldap_state->ldap_struct);
1672                                 ldap_state->ldap_struct = NULL;
1673                         }
1674                 }
1675         }
1676
1677         TALLOC_FREE(utf8_dn);
1678         return rc;
1679 }
1680
1681 int smbldap_extended_operation(struct smbldap_state *ldap_state,
1682                                LDAP_CONST char *reqoid, struct berval *reqdata,
1683                                LDAPControl **serverctrls, LDAPControl **clientctrls,
1684                                char **retoidp, struct berval **retdatap)
1685 {
1686         int             rc = LDAP_SERVER_DOWN;
1687         int             attempts = 0;
1688         time_t          endtime = time_mono(NULL)+lp_ldap_timeout();
1689
1690         if (!ldap_state)
1691                 return (-1);
1692
1693         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1694                 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
1695                                                reqdata, serverctrls,
1696                                                clientctrls, retoidp, retdatap);
1697                 if (rc != LDAP_SUCCESS) {
1698                         char *ld_error = NULL;
1699                         int ld_errno;
1700
1701                         ldap_get_option(ldap_state->ldap_struct,
1702                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1703
1704                         ldap_get_option(ldap_state->ldap_struct,
1705                                         LDAP_OPT_ERROR_STRING, &ld_error);
1706                         DEBUG(10, ("Extended operation failed with error: "
1707                                    "%d (%s) (%s)\n", ld_errno,
1708                                    ldap_err2string(rc),
1709                                    ld_error ? ld_error : "unknown"));
1710                         SAFE_FREE(ld_error);
1711
1712                         if (ld_errno == LDAP_SERVER_DOWN) {
1713                                 ldap_unbind(ldap_state->ldap_struct);
1714                                 ldap_state->ldap_struct = NULL;
1715                         }
1716                 }
1717         }
1718
1719         return rc;
1720 }
1721
1722 /*******************************************************************
1723  run the search by name.
1724 ******************************************************************/
1725 int smbldap_search_suffix (struct smbldap_state *ldap_state,
1726                            const char *filter, const char **search_attr,
1727                            LDAPMessage ** result)
1728 {
1729         return smbldap_search(ldap_state, lp_ldap_suffix(), LDAP_SCOPE_SUBTREE,
1730                               filter, search_attr, 0, result);
1731 }
1732
1733 static void smbldap_idle_fn(struct event_context *event_ctx,
1734                             struct timed_event *te,
1735                             struct timeval now_abs,
1736                             void *private_data)
1737 {
1738         struct smbldap_state *state = (struct smbldap_state *)private_data;
1739
1740         TALLOC_FREE(state->idle_event);
1741
1742         if (state->ldap_struct == NULL) {
1743                 DEBUG(10,("ldap connection not connected...\n"));
1744                 return;
1745         }
1746
1747         if ((state->last_use+SMBLDAP_IDLE_TIME) > time_mono(NULL)) {
1748                 DEBUG(10,("ldap connection not idle...\n"));
1749
1750                 /* this needs to be made monotonic clock aware inside tevent: */
1751                 state->idle_event = event_add_timed(
1752                         event_ctx, NULL,
1753                         timeval_add(&now_abs, SMBLDAP_IDLE_TIME, 0),
1754                         smbldap_idle_fn,
1755                         private_data);
1756                 return;
1757         }
1758
1759         DEBUG(7,("ldap connection idle...closing connection\n"));
1760         smbldap_close(state);
1761 }
1762
1763 /**********************************************************************
1764  Housekeeping
1765  *********************************************************************/
1766
1767 void smbldap_free_struct(struct smbldap_state **ldap_state)
1768 {
1769         smbldap_close(*ldap_state);
1770
1771         if ((*ldap_state)->bind_secret) {
1772                 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1773         }
1774
1775         SAFE_FREE((*ldap_state)->bind_dn);
1776         SAFE_FREE((*ldap_state)->bind_secret);
1777
1778         TALLOC_FREE((*ldap_state)->idle_event);
1779
1780         *ldap_state = NULL;
1781
1782         /* No need to free any further, as it is talloc()ed */
1783 }
1784
1785
1786 /**********************************************************************
1787  Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1788  *********************************************************************/
1789
1790 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, struct event_context *event_ctx,
1791                       const char *location,
1792                       struct smbldap_state **smbldap_state)
1793 {
1794         *smbldap_state = TALLOC_ZERO_P(mem_ctx, struct smbldap_state);
1795         if (!*smbldap_state) {
1796                 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1797                 return NT_STATUS_NO_MEMORY;
1798         }
1799
1800         if (location) {
1801                 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1802         } else {
1803                 (*smbldap_state)->uri = "ldap://localhost";
1804         }
1805
1806         (*smbldap_state)->event_context = event_ctx;
1807
1808         return NT_STATUS_OK;
1809 }
1810
1811  char *smbldap_talloc_dn(TALLOC_CTX *mem_ctx, LDAP *ld,
1812                          LDAPMessage *entry)
1813 {
1814         char *utf8_dn, *unix_dn;
1815         size_t converted_size;
1816
1817         utf8_dn = ldap_get_dn(ld, entry);
1818         if (!utf8_dn) {
1819                 DEBUG (5, ("smbldap_talloc_dn: ldap_get_dn failed\n"));
1820                 return NULL;
1821         }
1822         if (!pull_utf8_talloc(mem_ctx, &unix_dn, utf8_dn, &converted_size)) {
1823                 DEBUG (0, ("smbldap_talloc_dn: String conversion failure utf8 "
1824                            "[%s]\n", utf8_dn));
1825                 return NULL;
1826         }
1827         ldap_memfree(utf8_dn);
1828         return unix_dn;
1829 }
1830
1831 /*******************************************************************
1832  Check if root-dse has a certain Control or Extension
1833 ********************************************************************/
1834
1835 static bool smbldap_check_root_dse(LDAP *ld, const char **attrs, const char *value)
1836 {
1837         LDAPMessage *msg = NULL;
1838         LDAPMessage *entry = NULL;
1839         char **values = NULL;
1840         int rc, num_result, num_values, i;
1841         bool result = False;
1842
1843         if (!attrs[0]) {
1844                 DEBUG(3,("smbldap_check_root_dse: nothing to look for\n"));
1845                 return False;
1846         }
1847
1848         if (!strequal(attrs[0], "supportedExtension") &&
1849             !strequal(attrs[0], "supportedControl") &&
1850             !strequal(attrs[0], "namingContexts")) {
1851                 DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0]));
1852                 return False;
1853         }
1854
1855         rc = ldap_search_s(ld, "", LDAP_SCOPE_BASE,
1856                            "(objectclass=*)", CONST_DISCARD(char **, attrs), 0 , &msg);
1857
1858         if (rc != LDAP_SUCCESS) {
1859                 DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n"));
1860                 return False;
1861         }
1862
1863         num_result = ldap_count_entries(ld, msg);
1864
1865         if (num_result != 1) {
1866                 DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result));
1867                 goto done;
1868         }
1869
1870         entry = ldap_first_entry(ld, msg);
1871
1872         if (entry == NULL) {
1873                 DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n"));
1874                 goto done;
1875         }
1876
1877         values = ldap_get_values(ld, entry, attrs[0]);
1878
1879         if (values == NULL) {
1880                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0]));
1881                 goto done;
1882         }
1883
1884         num_values = ldap_count_values(values);
1885
1886         if (num_values == 0) {
1887                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0]));
1888                 goto done;
1889         }
1890
1891         for (i=0; i<num_values; i++) {
1892                 if (strcmp(values[i], value) == 0)
1893                         result = True;
1894         }
1895
1896
1897  done:
1898         if (values != NULL)
1899                 ldap_value_free(values);
1900         if (msg != NULL)
1901                 ldap_msgfree(msg);
1902
1903         return result;
1904
1905 }
1906
1907 /*******************************************************************
1908  Check if LDAP-Server supports a certain Control (OID in string format)
1909 ********************************************************************/
1910
1911 bool smbldap_has_control(LDAP *ld, const char *control)
1912 {
1913         const char *attrs[] = { "supportedControl", NULL };
1914         return smbldap_check_root_dse(ld, attrs, control);
1915 }
1916
1917 /*******************************************************************
1918  Check if LDAP-Server supports a certain Extension (OID in string format)
1919 ********************************************************************/
1920
1921 bool smbldap_has_extension(LDAP *ld, const char *extension)
1922 {
1923         const char *attrs[] = { "supportedExtension", NULL };
1924         return smbldap_check_root_dse(ld, attrs, extension);
1925 }
1926
1927 /*******************************************************************
1928  Check if LDAP-Server holds a given namingContext
1929 ********************************************************************/
1930
1931 bool smbldap_has_naming_context(LDAP *ld, const char *naming_context)
1932 {
1933         const char *attrs[] = { "namingContexts", NULL };
1934         return smbldap_check_root_dse(ld, attrs, naming_context);
1935 }
1936
1937 bool smbldap_set_creds(struct smbldap_state *ldap_state, bool anon, const char *dn, const char *secret)
1938 {
1939         ldap_state->anonymous = anon;
1940
1941         /* free any previously set credential */
1942
1943         SAFE_FREE(ldap_state->bind_dn);
1944         if (ldap_state->bind_secret) {
1945                 /* make sure secrets are zeroed out of memory */
1946                 memset(ldap_state->bind_secret, '\0', strlen(ldap_state->bind_secret));
1947                 SAFE_FREE(ldap_state->bind_secret);
1948         }
1949
1950         if ( ! anon) {
1951                 ldap_state->bind_dn = SMB_STRDUP(dn);
1952                 ldap_state->bind_secret = SMB_STRDUP(secret);
1953         }
1954
1955         return True;
1956 }