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         size_t size = 0;
 268
 269         if ( !attribute )
 270                 return False;
 271
 272         value[0] = '\0';
 273
 274         if ((values = ldap_get_values (ldap_struct, entry, attribute)) == NULL) {
 275                 DEBUG (10, ("smbldap_get_single_attribute: [%s] = [<does not exist>]\n", attribute));
 276
 277                 return False;
 278         }
 279
 280         if (!convert_string(CH_UTF8, CH_UNIX,values[0], -1, value, max_len, &size)) {
 281                 DEBUG(1, ("smbldap_get_single_attribute: string conversion of [%s] = [%s] failed!\n",
 282                           attribute, values[0]));
 283                 ldap_value_free(values);
 284                 return False;
 285         }
 286
 287         ldap_value_free(values);
 288 #ifdef DEBUG_PASSWORDS
 289         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n", attribute, value));
 290 #endif
 291         return True;
 292 }
 293
 294  char * smbldap_talloc_single_attribute(LDAP *ldap_struct, LDAPMessage *entry,
 295                                         const char *attribute,
 296                                         TALLOC_CTX *mem_ctx)
 297 {
 298         char **values;
 299         char *result;
 300         size_t converted_size;
 301
 302         if (attribute == NULL) {
 303                 return NULL;
 304         }
 305
 306         values = ldap_get_values(ldap_struct, entry, attribute);
 307
 308         if (values == NULL) {
 309                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 310                 return NULL;
 311         }
 312
 313         if (ldap_count_values(values) != 1) {
 314                 DEBUG(10, ("attribute %s has %d values, expected only one\n",
 315                            attribute, ldap_count_values(values)));
 316                 ldap_value_free(values);
 317                 return NULL;
 318         }
 319
 320         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
 321                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 322                 ldap_value_free(values);
 323                 return NULL;
 324         }
 325
 326         ldap_value_free(values);
 327
 328 #ifdef DEBUG_PASSWORDS
 329         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
 330                      attribute, result));
 331 #endif
 332         return result;
 333 }
 334
 335  char * smbldap_talloc_first_attribute(LDAP *ldap_struct, LDAPMessage *entry,
 336                                        const char *attribute,
 337                                        TALLOC_CTX *mem_ctx)
 338 {
 339         char **values;
 340         char *result;
 341         size_t converted_size;
 342
 343         if (attribute == NULL) {
 344                 return NULL;
 345         }
 346
 347         values = ldap_get_values(ldap_struct, entry, attribute);
 348
 349         if (values == NULL) {
 350                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 351                 return NULL;
 352         }
 353
 354         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
 355                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 356                 ldap_value_free(values);
 357                 return NULL;
 358         }
 359
 360         ldap_value_free(values);
 361
 362 #ifdef DEBUG_PASSWORDS
 363         DEBUG (100, ("smbldap_get_first_attribute: [%s] = [%s]\n",
 364                      attribute, result));
 365 #endif
 366         return result;
 367 }
 368
 369  char * smbldap_talloc_smallest_attribute(LDAP *ldap_struct, LDAPMessage *entry,
 370                                           const char *attribute,
 371                                           TALLOC_CTX *mem_ctx)
 372 {
 373         char **values;
 374         char *result;
 375         size_t converted_size;
 376         int i, num_values;
 377
 378         if (attribute == NULL) {
 379                 return NULL;
 380         }
 381
 382         values = ldap_get_values(ldap_struct, entry, attribute);
 383
 384         if (values == NULL) {
 385                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 386                 return NULL;
 387         }
 388
 389         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
 390                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 391                 ldap_value_free(values);
 392                 return NULL;
 393         }
 394
 395         num_values = ldap_count_values(values);
 396
 397         for (i=1; i<num_values; i++) {
 398                 char *tmp;
 399
 400                 if (!pull_utf8_talloc(mem_ctx, &tmp, values[i],
 401                                       &converted_size)) {
 402                         DEBUG(10, ("pull_utf8_talloc failed\n"));
 403                         TALLOC_FREE(result);
 404                         ldap_value_free(values);
 405                         return NULL;
 406                 }
 407
 408                 if (StrCaseCmp(tmp, result) < 0) {
 409                         TALLOC_FREE(result);
 410                         result = tmp;
 411                 } else {
 412                         TALLOC_FREE(tmp);
 413                 }
 414         }
 415
 416         ldap_value_free(values);
 417
 418 #ifdef DEBUG_PASSWORDS
 419         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
 420                      attribute, result));
 421 #endif
 422         return result;
 423 }
 424
 425  bool smbldap_talloc_single_blob(TALLOC_CTX *mem_ctx, LDAP *ld,
 426                                  LDAPMessage *msg, const char *attrib,
 427                                  DATA_BLOB *blob)
 428 {
 429         struct berval **values;
 430
 431         values = ldap_get_values_len(ld, msg, attrib);
 432         if (!values) {
 433                 return false;
 434         }
 435
 436         if (ldap_count_values_len(values) != 1) {
 437                 DEBUG(10, ("Expected one value for %s, got %d\n", attrib,
 438                            ldap_count_values_len(values)));
 439                 return false;
 440         }
 441
 442         *blob = data_blob_talloc(mem_ctx, values[0]->bv_val,
 443                                  values[0]->bv_len);
 444         ldap_value_free_len(values);
 445
 446         return (blob->data != NULL);
 447 }
 448
 449  bool smbldap_pull_sid(LDAP *ld, LDAPMessage *msg, const char *attrib,
 450                        struct dom_sid *sid)
 451 {
 452         DATA_BLOB blob;
 453         bool ret;
 454
 455         if (!smbldap_talloc_single_blob(talloc_tos(), ld, msg, attrib,
 456                                         &blob)) {
 457                 return false;
 458         }
 459         ret = sid_parse((char *)blob.data, blob.length, sid);
 460         TALLOC_FREE(blob.data);
 461         return ret;
 462 }
 463
 464  static int ldapmsg_destructor(LDAPMessage **result) {
 465         ldap_msgfree(*result);
 466         return 0;
 467 }
 468
 469  void talloc_autofree_ldapmsg(TALLOC_CTX *mem_ctx, LDAPMessage *result)
 470 {
 471         LDAPMessage **handle;
 472
 473         if (result == NULL) {
 474                 return;
 475         }
 476
 477         handle = TALLOC_P(mem_ctx, LDAPMessage *);
 478         SMB_ASSERT(handle != NULL);
 479
 480         *handle = result;
 481         talloc_set_destructor(handle, ldapmsg_destructor);
 482 }
 483
 484  static int ldapmod_destructor(LDAPMod ***mod) {
 485         ldap_mods_free(*mod, True);
 486         return 0;
 487 }
 488
 489  void talloc_autofree_ldapmod(TALLOC_CTX *mem_ctx, LDAPMod **mod)
 490 {
 491         LDAPMod ***handle;
 492
 493         if (mod == NULL) {
 494                 return;
 495         }
 496
 497         handle = TALLOC_P(mem_ctx, LDAPMod **);
 498         SMB_ASSERT(handle != NULL);
 499
 500         *handle = mod;
 501         talloc_set_destructor(handle, ldapmod_destructor);
 502 }
 503
 504 /************************************************************************
 505  Routine to manage the LDAPMod structure array
 506  manage memory used by the array, by each struct, and values
 507  ***********************************************************************/
 508
 509  void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
 510 {
 511         LDAPMod **mods;
 512         int i;
 513         int j;
 514
 515         mods = *modlist;
 516
 517         /* sanity checks on the mod values */
 518
 519         if (attribute == NULL || *attribute == '\0') {
 520                 return;
 521         }
 522
 523 #if 0   /* commented out after discussion with abartlet.  Do not reenable.
 524            left here so other do not re-add similar code   --jerry */
 525         if (value == NULL || *value == '\0')
 526                 return;
 527 #endif
 528
 529         if (mods == NULL) {
 530                 mods = SMB_MALLOC_P(LDAPMod *);
 531                 if (mods == NULL) {
 532                         smb_panic("smbldap_set_mod: out of memory!");
 533                         /* notreached. */
 534                 }
 535                 mods[0] = NULL;
 536         }
 537
 538         for (i = 0; mods[i] != NULL; ++i) {
 539                 if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
 540                         break;
 541         }
 542
 543         if (mods[i] == NULL) {
 544                 mods = SMB_REALLOC_ARRAY (mods, LDAPMod *, i + 2);
 545                 if (mods == NULL) {
 546                         smb_panic("smbldap_set_mod: out of memory!");
 547                         /* notreached. */
 548                 }
 549                 mods[i] = SMB_MALLOC_P(LDAPMod);
 550                 if (mods[i] == NULL) {
 551                         smb_panic("smbldap_set_mod: out of memory!");
 552                         /* notreached. */
 553                 }
 554                 mods[i]->mod_op = modop;
 555                 mods[i]->mod_values = NULL;
 556                 mods[i]->mod_type = SMB_STRDUP(attribute);
 557                 mods[i + 1] = NULL;
 558         }
 559
 560         if (value != NULL) {
 561                 char *utf8_value = NULL;
 562                 size_t converted_size;
 563
 564                 j = 0;
 565                 if (mods[i]->mod_values != NULL) {
 566                         for (; mods[i]->mod_values[j] != NULL; j++);
 567                 }
 568                 mods[i]->mod_values = SMB_REALLOC_ARRAY(mods[i]->mod_values, char *, j + 2);
 569
 570                 if (mods[i]->mod_values == NULL) {
 571                         smb_panic("smbldap_set_mod: out of memory!");
 572                         /* notreached. */
 573                 }
 574
 575                 if (!push_utf8_talloc(talloc_tos(), &utf8_value, value, &converted_size)) {
 576                         smb_panic("smbldap_set_mod: String conversion failure!");
 577                         /* notreached. */
 578                 }
 579
 580                 mods[i]->mod_values[j] = SMB_STRDUP(utf8_value);
 581                 TALLOC_FREE(utf8_value);
 582                 SMB_ASSERT(mods[i]->mod_values[j] != NULL);
 583
 584                 mods[i]->mod_values[j + 1] = NULL;
 585         }
 586         *modlist = mods;
 587 }
 588
 589 /**********************************************************************
 590   Set attribute to newval in LDAP, regardless of what value the
 591   attribute had in LDAP before.
 592 *********************************************************************/
 593
 594  void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
 595                       LDAPMod ***mods,
 596                       const char *attribute, const char *newval)
 597 {
 598         char oldval[2048]; /* current largest allowed value is mungeddial */
 599         bool existed;
 600
 601         if (attribute == NULL) {
 602                 /* This can actually happen for ldapsam_compat where we for
 603                  * example don't have a password history */
 604                 return;
 605         }
 606
 607         if (existing != NULL) {
 608                 existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
 609         } else {
 610                 existed = False;
 611                 *oldval = '\0';
 612         }
 613
 614         /* all of our string attributes are case insensitive */
 615
 616         if (existed && newval && (StrCaseCmp(oldval, newval) == 0)) {
 617
 618                 /* Believe it or not, but LDAP will deny a delete and
 619                    an add at the same time if the values are the
 620                    same... */
 621                 DEBUG(10,("smbldap_make_mod: attribute |%s| not changed.\n", attribute));
 622                 return;
 623         }
 624
 625         if (existed) {
 626                 /* There has been no value before, so don't delete it.
 627                  * Here's a possible race: We might end up with
 628                  * duplicate attributes */
 629                 /* By deleting exactly the value we found in the entry this
 630                  * should be race-free in the sense that the LDAP-Server will
 631                  * deny the complete operation if somebody changed the
 632                  * attribute behind our back. */
 633                 /* This will also allow modifying single valued attributes
 634                  * in Novell NDS. In NDS you have to first remove attribute and then
 635                  * you could add new value */
 636
 637                 DEBUG(10,("smbldap_make_mod: deleting attribute |%s| values |%s|\n", attribute, oldval));
 638                 smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
 639         }
 640
 641         /* Regardless of the real operation (add or modify)
 642            we add the new value here. We rely on deleting
 643            the old value, should it exist. */
 644
 645         if ((newval != NULL) && (strlen(newval) > 0)) {
 646                 DEBUG(10,("smbldap_make_mod: adding attribute |%s| value |%s|\n", attribute, newval));
 647                 smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
 648         }
 649 }
 650
 651 /**********************************************************************
 652  Some varients of the LDAP rebind code do not pass in the third 'arg'
 653  pointer to a void*, so we try and work around it by assuming that the
 654  value of the 'LDAP *' pointer is the same as the one we had passed in
 655  **********************************************************************/
 656
 657 struct smbldap_state_lookup {
 658         LDAP *ld;
 659         struct smbldap_state *smbldap_state;
 660         struct smbldap_state_lookup *prev, *next;
 661 };
 662
 663 static struct smbldap_state_lookup *smbldap_state_lookup_list;
 664
 665 static struct smbldap_state *smbldap_find_state(LDAP *ld)
 666 {
 667         struct smbldap_state_lookup *t;
 668
 669         for (t = smbldap_state_lookup_list; t; t = t->next) {
 670                 if (t->ld == ld) {
 671                         return t->smbldap_state;
 672                 }
 673         }
 674         return NULL;
 675 }
 676
 677 static void smbldap_delete_state(struct smbldap_state *smbldap_state)
 678 {
 679         struct smbldap_state_lookup *t;
 680
 681         for (t = smbldap_state_lookup_list; t; t = t->next) {
 682                 if (t->smbldap_state == smbldap_state) {
 683                         DLIST_REMOVE(smbldap_state_lookup_list, t);
 684                         SAFE_FREE(t);
 685                         return;
 686                 }
 687         }
 688 }
 689
 690 static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state)
 691 {
 692         struct smbldap_state *tmp_ldap_state;
 693         struct smbldap_state_lookup *t;
 694
 695         if ((tmp_ldap_state = smbldap_find_state(ld))) {
 696                 SMB_ASSERT(tmp_ldap_state == smbldap_state);
 697                 return;
 698         }
 699
 700         t = SMB_XMALLOC_P(struct smbldap_state_lookup);
 701         ZERO_STRUCTP(t);
 702
 703         DLIST_ADD_END(smbldap_state_lookup_list, t, struct smbldap_state_lookup *);
 704         t->ld = ld;
 705         t->smbldap_state = smbldap_state;
 706 }
 707
 708 /********************************************************************
 709  start TLS on an existing LDAP connection
 710 *******************************************************************/
 711
 712 int smb_ldap_start_tls(LDAP *ldap_struct, int version)
 713 {
 714 #ifdef LDAP_OPT_X_TLS
 715         int rc;
 716 #endif
 717
 718         if (lp_ldap_ssl() != LDAP_SSL_START_TLS) {
 719                 return LDAP_SUCCESS;
 720         }
 721
 722 #ifdef LDAP_OPT_X_TLS
 723         if (version != LDAP_VERSION3) {
 724                 DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
 725                 return LDAP_OPERATIONS_ERROR;
 726         }
 727
 728         if ((rc = ldap_start_tls_s (ldap_struct, NULL, NULL)) != LDAP_SUCCESS)  {
 729                 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
 730                          ldap_err2string(rc)));
 731                 return rc;
 732         }
 733
 734         DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
 735         return LDAP_SUCCESS;
 736 #else
 737         DEBUG(0,("StartTLS not supported by LDAP client libraries!\n"));
 738         return LDAP_OPERATIONS_ERROR;
 739 #endif
 740 }
 741
 742 /********************************************************************
 743  setup a connection to the LDAP server based on a uri
 744 *******************************************************************/
 745
 746 static int smb_ldap_setup_conn(LDAP **ldap_struct, const char *uri)
 747 {
 748         int rc;
 749
 750         DEBUG(10, ("smb_ldap_setup_connection: %s\n", uri));
 751
 752 #ifdef HAVE_LDAP_INITIALIZE
 753
 754         rc = ldap_initialize(ldap_struct, uri);
 755         if (rc) {
 756                 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
 757                 return rc;
 758         }
 759
 760         if (lp_ldap_follow_referral() != Auto) {
 761                 rc = ldap_set_option(*ldap_struct, LDAP_OPT_REFERRALS,
 762                      lp_ldap_follow_referral() ? LDAP_OPT_ON : LDAP_OPT_OFF);
 763                 if (rc != LDAP_SUCCESS)
 764                         DEBUG(0, ("Failed to set LDAP_OPT_REFERRALS: %s\n",
 765                                 ldap_err2string(rc)));
 766         }
 767
 768         return LDAP_SUCCESS;
 769 #else
 770
 771         /* Parse the string manually */
 772
 773         {
 774                 int port = 0;
 775                 fstring protocol;
 776                 fstring host;
 777                 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
 778
 779
 780                 /* skip leading "URL:" (if any) */
 781                 if ( strnequal( uri, "URL:", 4 ) ) {
 782                         uri += 4;
 783                 }
 784
 785                 sscanf(uri, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
 786
 787                 if (port == 0) {
 788                         if (strequal(protocol, "ldap")) {
 789                                 port = LDAP_PORT;
 790                         } else if (strequal(protocol, "ldaps")) {
 791                                 port = LDAPS_PORT;
 792                         } else {
 793                                 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
 794                         }
 795                 }
 796
 797                 if ((*ldap_struct = ldap_init(host, port)) == NULL)     {
 798                         DEBUG(0, ("ldap_init failed !\n"));
 799                         return LDAP_OPERATIONS_ERROR;
 800                 }
 801
 802                 if (strequal(protocol, "ldaps")) {
 803 #ifdef LDAP_OPT_X_TLS
 804                         int tls = LDAP_OPT_X_TLS_HARD;
 805                         if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
 806                         {
 807                                 DEBUG(0, ("Failed to setup a TLS session\n"));
 808                         }
 809
 810                         DEBUG(3,("LDAPS option set...!\n"));
 811 #else
 812                         DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
 813                         return LDAP_OPERATIONS_ERROR;
 814 #endif /* LDAP_OPT_X_TLS */
 815                 }
 816         }
 817 #endif /* HAVE_LDAP_INITIALIZE */
 818
 819         /* now set connection timeout */
 820 #ifdef LDAP_X_OPT_CONNECT_TIMEOUT /* Netscape */
 821         {
 822                 int ct = lp_ldap_connection_timeout()*1000;
 823                 rc = ldap_set_option(*ldap_struct, LDAP_X_OPT_CONNECT_TIMEOUT, &ct);
 824                 if (rc != LDAP_SUCCESS) {
 825                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
 826                                 ct, ldap_err2string(rc)));
 827                 }
 828         }
 829 #elif defined (LDAP_OPT_NETWORK_TIMEOUT) /* OpenLDAP */
 830         {
 831                 struct timeval ct;
 832                 ct.tv_usec = 0;
 833                 ct.tv_sec = lp_ldap_connection_timeout();
 834                 rc = ldap_set_option(*ldap_struct, LDAP_OPT_NETWORK_TIMEOUT, &ct);
 835                 if (rc != LDAP_SUCCESS) {
 836                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
 837                                 (int)ct.tv_sec, ldap_err2string(rc)));
 838                 }
 839         }
 840 #endif
 841
 842         return LDAP_SUCCESS;
 843 }
 844
 845 /********************************************************************
 846  try to upgrade to Version 3 LDAP if not already, in either case return current
 847  version
 848  *******************************************************************/
 849
 850 static int smb_ldap_upgrade_conn(LDAP *ldap_struct, int *new_version)
 851 {
 852         int version;
 853         int rc;
 854
 855         /* assume the worst */
 856         *new_version = LDAP_VERSION2;
 857
 858         rc = ldap_get_option(ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 859         if (rc) {
 860                 return rc;
 861         }
 862
 863         if (version == LDAP_VERSION3) {
 864                 *new_version = LDAP_VERSION3;
 865                 return LDAP_SUCCESS;
 866         }
 867
 868         /* try upgrade */
 869         version = LDAP_VERSION3;
 870         rc = ldap_set_option (ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 871         if (rc) {
 872                 return rc;
 873         }
 874
 875         *new_version = LDAP_VERSION3;
 876         return LDAP_SUCCESS;
 877 }
 878
 879 /*******************************************************************
 880  open a connection to the ldap server (just until the bind)
 881  ******************************************************************/
 882
 883 int smb_ldap_setup_full_conn(LDAP **ldap_struct, const char *uri)
 884 {
 885         int rc, version;
 886
 887         rc = smb_ldap_setup_conn(ldap_struct, uri);
 888         if (rc) {
 889                 return rc;
 890         }
 891
 892         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 893         if (rc) {
 894                 return rc;
 895         }
 896
 897         rc = smb_ldap_start_tls(*ldap_struct, version);
 898         if (rc) {
 899                 return rc;
 900         }
 901
 902         return LDAP_SUCCESS;
 903 }
 904
 905 /*******************************************************************
 906  open a connection to the ldap server.
 907 ******************************************************************/
 908 static int smbldap_open_connection (struct smbldap_state *ldap_state)
 909
 910 {
 911         int rc = LDAP_SUCCESS;
 912         int version;
 913         int deref;
 914         LDAP **ldap_struct = &ldap_state->ldap_struct;
 915
 916         rc = smb_ldap_setup_conn(ldap_struct, ldap_state->uri);
 917         if (rc) {
 918                 return rc;
 919         }
 920
 921         /* Store the LDAP pointer in a lookup list */
 922
 923         smbldap_store_state(*ldap_struct, ldap_state);
 924
 925         /* Upgrade to LDAPv3 if possible */
 926
 927         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 928         if (rc) {
 929                 return rc;
 930         }
 931
 932         /* Start TLS if required */
 933
 934         rc = smb_ldap_start_tls(*ldap_struct, version);
 935         if (rc) {
 936                 return rc;
 937         }
 938
 939         /* Set alias dereferencing method */
 940         deref = lp_ldap_deref();
 941         if (deref != -1) {
 942                 if (ldap_set_option (*ldap_struct, LDAP_OPT_DEREF, &deref) != LDAP_OPT_SUCCESS) {
 943                         DEBUG(1,("smbldap_open_connection: Failed to set dereferencing method: %d\n", deref));
 944                 } else {
 945                         DEBUG(5,("Set dereferencing method: %d\n", deref));
 946                 }
 947         }
 948
 949         DEBUG(2, ("smbldap_open_connection: connection opened\n"));
 950         return rc;
 951 }
 952
 953 /*******************************************************************
 954  a rebind function for authenticated referrals
 955  This version takes a void* that we can shove useful stuff in :-)
 956 ******************************************************************/
 957 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 958 #else
 959 static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp,
 960                                    int *methodp, int freeit, void *arg)
 961 {
 962         struct smbldap_state *ldap_state = arg;
 963         struct timespec ts;
 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         clock_gettime_mono(&ts);
 997         ldap_state->last_rebind = convert_timespec_to_timeval(ts);
 998
 999         return 0;
1000 }
1001 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1002
1003 /*******************************************************************
1004  a rebind function for authenticated referrals
1005  This version takes a void* that we can shove useful stuff in :-)
1006  and actually does the connection.
1007 ******************************************************************/
1008 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1009 static int rebindproc_connect_with_state (LDAP *ldap_struct,
1010                                           LDAP_CONST char *url,
1011                                           ber_tag_t request,
1012                                           ber_int_t msgid, void *arg)
1013 {
1014         struct smbldap_state *ldap_state =
1015                 (struct smbldap_state *)arg;
1016         int rc;
1017         struct timespec ts;
1018         int version;
1019
1020         DEBUG(5,("rebindproc_connect_with_state: Rebinding to %s as \"%s\"\n",
1021                  url, ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
1022
1023         /* call START_TLS again (ldaps:// is handled by the OpenLDAP library
1024          * itself) before rebinding to another LDAP server to avoid to expose
1025          * our credentials. At least *try* to secure the connection - Guenther */
1026
1027         smb_ldap_upgrade_conn(ldap_struct, &version);
1028         smb_ldap_start_tls(ldap_struct, version);
1029
1030         /** @TODO Should we be doing something to check what servers we rebind to?
1031             Could we get a referral to a machine that we don't want to give our
1032             username and password to? */
1033
1034         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
1035
1036         /* only set the last rebind timestamp when we did rebind after a
1037          * non-read LDAP operation. That way we avoid the replication sleep
1038          * after a simple redirected search operation - Guenther */
1039
1040         switch (request) {
1041
1042                 case LDAP_REQ_MODIFY:
1043                 case LDAP_REQ_ADD:
1044                 case LDAP_REQ_DELETE:
1045                 case LDAP_REQ_MODDN:
1046                 case LDAP_REQ_EXTENDED:
1047                         DEBUG(10,("rebindproc_connect_with_state: "
1048                                 "setting last_rebind timestamp "
1049                                 "(req: 0x%02x)\n", (unsigned int)request));
1050                         clock_gettime_mono(&ts);
1051                         ldap_state->last_rebind = convert_timespec_to_timeval(ts);
1052                         break;
1053                 default:
1054                         ZERO_STRUCT(ldap_state->last_rebind);
1055                         break;
1056         }
1057
1058         return rc;
1059 }
1060 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1061
1062 /*******************************************************************
1063  Add a rebind function for authenticated referrals
1064 ******************************************************************/
1065 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1066 #else
1067 # if LDAP_SET_REBIND_PROC_ARGS == 2
1068 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
1069                        int *method, int freeit )
1070 {
1071         struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
1072
1073         return rebindproc_with_state(ldap_struct, whop, credp,
1074                                      method, freeit, ldap_state);
1075 }
1076 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
1077 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1078
1079 /*******************************************************************
1080  a rebind function for authenticated referrals
1081  this also does the connection, but no void*.
1082 ******************************************************************/
1083 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1084 # if LDAP_SET_REBIND_PROC_ARGS == 2
1085 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
1086                                ber_int_t msgid)
1087 {
1088         struct smbldap_state *ldap_state = smbldap_find_state(ld);
1089
1090         return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid,
1091                                              ldap_state);
1092 }
1093 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
1094 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1095
1096 /*******************************************************************
1097  connect to the ldap server under system privilege.
1098 ******************************************************************/
1099 static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_struct)
1100 {
1101         int rc;
1102         int version;
1103
1104         if (!ldap_state->anonymous && !ldap_state->bind_dn) {
1105                 char *bind_dn = NULL;
1106                 char *bind_secret = NULL;
1107
1108                 /* get the default dn and password only if they are not set already */
1109                 if (!fetch_ldap_pw(&bind_dn, &bind_secret)) {
1110                         DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
1111                         return LDAP_INVALID_CREDENTIALS;
1112                 }
1113                 smbldap_set_creds(ldap_state, false, bind_dn, bind_secret);
1114                 SAFE_FREE(bind_dn);
1115                 memset(bind_secret, '\0', strlen(bind_secret));
1116                 SAFE_FREE(bind_secret);
1117         }
1118
1119         /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite
1120            (OpenLDAP) doesnt' seem to support it */
1121
1122         DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
1123                   ldap_state->uri, ldap_state->bind_dn));
1124
1125 #ifdef HAVE_LDAP_SET_REBIND_PROC
1126 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1127 # if LDAP_SET_REBIND_PROC_ARGS == 2
1128         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect);
1129 # endif
1130 # if LDAP_SET_REBIND_PROC_ARGS == 3
1131         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);
1132 # endif
1133 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1134 # if LDAP_SET_REBIND_PROC_ARGS == 2
1135         ldap_set_rebind_proc(ldap_struct, &rebindproc);
1136 # endif
1137 # if LDAP_SET_REBIND_PROC_ARGS == 3
1138         ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);
1139 # endif
1140 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1141 #endif
1142
1143         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
1144
1145         if (rc != LDAP_SUCCESS) {
1146                 char *ld_error = NULL;
1147                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
1148                                 &ld_error);
1149                 DEBUG(ldap_state->num_failures ? 2 : 0,
1150                       ("failed to bind to server %s with dn=\"%s\" Error: %s\n\t%s\n",
1151                                ldap_state->uri,
1152                                ldap_state->bind_dn ? ldap_state->bind_dn : "[Anonymous bind]",
1153                                ldap_err2string(rc),
1154                                ld_error ? ld_error : "(unknown)"));
1155                 SAFE_FREE(ld_error);
1156                 ldap_state->num_failures++;
1157                 return rc;
1158         }
1159
1160         ldap_state->num_failures = 0;
1161         ldap_state->paged_results = False;
1162
1163         ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
1164
1165         if (smbldap_has_control(ldap_state->ldap_struct, ADS_PAGE_CTL_OID) && version == 3) {
1166                 ldap_state->paged_results = True;
1167         }
1168
1169         DEBUG(3, ("ldap_connect_system: successful connection to the LDAP server\n"));
1170         DEBUGADD(10, ("ldap_connect_system: LDAP server %s support paged results\n",
1171                 ldap_state->paged_results ? "does" : "does not"));
1172         return rc;
1173 }
1174
1175 static void smbldap_idle_fn(struct event_context *event_ctx,
1176                             struct timed_event *te,
1177                             struct timeval now_abs,
1178                             void *private_data);
1179
1180 /**********************************************************************
1181  Connect to LDAP server (called before every ldap operation)
1182 *********************************************************************/
1183 static int smbldap_open(struct smbldap_state *ldap_state)
1184 {
1185         int rc, opt_rc;
1186         bool reopen = False;
1187         SMB_ASSERT(ldap_state);
1188
1189         if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time_mono(NULL))) {
1190
1191 #ifdef HAVE_UNIXSOCKET
1192                 struct sockaddr_un addr;
1193 #else
1194                 struct sockaddr addr;
1195 #endif
1196                 socklen_t len = sizeof(addr);
1197                 int sd;
1198
1199                 opt_rc = ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd);
1200                 if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 )
1201                         reopen = True;
1202
1203 #ifdef HAVE_UNIXSOCKET
1204                 if (opt_rc == 0 && addr.sun_family == AF_UNIX)
1205                         reopen = True;
1206 #endif
1207                 if (reopen) {
1208                         /* the other end has died. reopen. */
1209                         ldap_unbind(ldap_state->ldap_struct);
1210                         ldap_state->ldap_struct = NULL;
1211                         ldap_state->last_ping = (time_t)0;
1212                 } else {
1213                         ldap_state->last_ping = time_mono(NULL);
1214                 }
1215         }
1216
1217         if (ldap_state->ldap_struct != NULL) {
1218                 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
1219                 return LDAP_SUCCESS;
1220         }
1221
1222         if ((rc = smbldap_open_connection(ldap_state))) {
1223                 return rc;
1224         }
1225
1226         if ((rc = smbldap_connect_system(ldap_state, ldap_state->ldap_struct))) {
1227                 ldap_unbind(ldap_state->ldap_struct);
1228                 ldap_state->ldap_struct = NULL;
1229                 return rc;
1230         }
1231
1232
1233         ldap_state->last_ping = time_mono(NULL);
1234         ldap_state->pid = sys_getpid();
1235
1236         TALLOC_FREE(ldap_state->idle_event);
1237
1238         if (ldap_state->event_context != NULL) {
1239                 ldap_state->idle_event = event_add_timed(
1240                         ldap_state->event_context, NULL,
1241                         timeval_current_ofs(SMBLDAP_IDLE_TIME, 0),
1242                         smbldap_idle_fn, ldap_state);
1243         }
1244
1245         DEBUG(4,("The LDAP server is successfully connected\n"));
1246
1247         return LDAP_SUCCESS;
1248 }
1249
1250 /**********************************************************************
1251 Disconnect from LDAP server
1252 *********************************************************************/
1253 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
1254 {
1255         if (!ldap_state)
1256                 return NT_STATUS_INVALID_PARAMETER;
1257
1258         if (ldap_state->ldap_struct != NULL) {
1259                 ldap_unbind(ldap_state->ldap_struct);
1260                 ldap_state->ldap_struct = NULL;
1261         }
1262
1263         smbldap_delete_state(ldap_state);
1264
1265         DEBUG(5,("The connection to the LDAP server was closed\n"));
1266         /* maybe free the results here --metze */
1267
1268         return NT_STATUS_OK;
1269 }
1270
1271 static bool got_alarm;
1272
1273 static void (*old_handler)(int);
1274
1275 static void gotalarm_sig(int dummy)
1276 {
1277         got_alarm = True;
1278 }
1279
1280 static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
1281                             int *attempts, time_t endtime)
1282 {
1283         time_t now = time_mono(NULL);
1284         int open_rc = LDAP_SERVER_DOWN;
1285
1286         if (*rc != LDAP_SERVER_DOWN)
1287                 goto no_next;
1288
1289         if (now >= endtime) {
1290                 smbldap_close(ldap_state);
1291                 *rc = LDAP_TIMEOUT;
1292                 goto no_next;
1293         }
1294
1295         if (*attempts == 0) {
1296                 got_alarm = False;
1297                 old_handler = CatchSignal(SIGALRM, gotalarm_sig);
1298                 alarm(endtime - now);
1299
1300                 if (ldap_state->pid != sys_getpid())
1301                         smbldap_close(ldap_state);
1302         }
1303
1304         while (1) {
1305
1306                 if (*attempts != 0)
1307                         smb_msleep(1000);
1308
1309                 *attempts += 1;
1310
1311                 open_rc = smbldap_open(ldap_state);
1312
1313                 if (open_rc == LDAP_SUCCESS) {
1314                         ldap_state->last_use = now;
1315                         return True;
1316                 }
1317
1318                 if (open_rc == LDAP_INSUFFICIENT_ACCESS) {
1319                         /* The fact that we are non-root or any other
1320                          * access-denied condition will not change in the next
1321                          * round of trying */
1322                         *rc = open_rc;
1323                         break;
1324                 }
1325
1326                 if (got_alarm) {
1327                         *rc = LDAP_TIMEOUT;
1328                         break;
1329                 }
1330
1331                 if (open_rc != LDAP_SUCCESS) {
1332                         DEBUG(1, ("Connection to LDAP server failed for the "
1333                                   "%d try!\n", *attempts));
1334                 }
1335         }
1336
1337  no_next:
1338         CatchSignal(SIGALRM, old_handler);
1339         alarm(0);
1340         ldap_state->last_use = now;
1341         return False;
1342 }
1343
1344 /*********************************************************************
1345  ********************************************************************/
1346
1347 static int smbldap_search_ext(struct smbldap_state *ldap_state,
1348                               const char *base, int scope, const char *filter,
1349                               const char *attrs[], int attrsonly,
1350                               LDAPControl **sctrls, LDAPControl **cctrls,
1351                               int sizelimit, LDAPMessage **res)
1352 {
1353         int             rc = LDAP_SERVER_DOWN;
1354         int             attempts = 0;
1355         char           *utf8_filter;
1356         time_t          endtime = time_mono(NULL)+lp_ldap_timeout();
1357         struct          timeval timeout;
1358         size_t          converted_size;
1359
1360         SMB_ASSERT(ldap_state);
1361
1362         DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], "
1363                  "scope => [%d]\n", base, filter, scope));
1364
1365         if (ldap_state->last_rebind.tv_sec > 0) {
1366                 struct timeval  tval;
1367                 struct timespec ts;
1368                 int64_t tdiff = 0;
1369                 int             sleep_time = 0;
1370
1371                 clock_gettime_mono(&ts);
1372                 tval = convert_timespec_to_timeval(ts);
1373
1374                 tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
1375                 tdiff /= 1000; /* Convert to milliseconds. */
1376
1377                 sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
1378                 sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
1379
1380                 if (sleep_time > 0) {
1381                         /* we wait for the LDAP replication */
1382                         DEBUG(5,("smbldap_search_ext: waiting %d milliseconds "
1383                                  "for LDAP replication.\n",sleep_time));
1384                         smb_msleep(sleep_time);
1385                         DEBUG(5,("smbldap_search_ext: go on!\n"));
1386                 }
1387                 ZERO_STRUCT(ldap_state->last_rebind);
1388         }
1389
1390         if (!push_utf8_talloc(talloc_tos(), &utf8_filter, filter, &converted_size)) {
1391                 return LDAP_NO_MEMORY;
1392         }
1393
1394         /* Setup timeout for the ldap_search_ext_s call - local and remote. */
1395         timeout.tv_sec = lp_ldap_timeout();
1396         timeout.tv_usec = 0;
1397
1398         /* Setup alarm timeout.... Do we need both of these ? JRA.
1399          * Yes, I think we do need both of these. The server timeout only
1400          * covers the case where the server's operation takes too long. It
1401          * does not cover the case where the request hangs on its way to the
1402          * server. The server side timeout is not strictly necessary, it's
1403          * just a bit more kind to the server. VL. */
1404
1405         got_alarm = 0;
1406         CatchSignal(SIGALRM, gotalarm_sig);
1407         alarm(lp_ldap_timeout());
1408         /* End setup timeout. */
1409
1410         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1411                 rc = ldap_search_ext_s(ldap_state->ldap_struct, base, scope,
1412                                        utf8_filter,
1413                                        CONST_DISCARD(char **, attrs),
1414                                        attrsonly, sctrls, cctrls, &timeout,
1415                                        sizelimit, res);
1416                 if (rc != LDAP_SUCCESS) {
1417                         char *ld_error = NULL;
1418                         int ld_errno;
1419
1420                         ldap_get_option(ldap_state->ldap_struct,
1421                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1422
1423                         ldap_get_option(ldap_state->ldap_struct,
1424                                         LDAP_OPT_ERROR_STRING, &ld_error);
1425                         DEBUG(10, ("Failed search for base: %s, error: %d (%s) "
1426                                    "(%s)\n", base, ld_errno,
1427                                    ldap_err2string(rc),
1428                                    ld_error ? ld_error : "unknown"));
1429                         SAFE_FREE(ld_error);
1430
1431                         if (ld_errno == LDAP_SERVER_DOWN) {
1432                                 ldap_unbind(ldap_state->ldap_struct);
1433                                 ldap_state->ldap_struct = NULL;
1434                         }
1435                 }
1436         }
1437
1438         TALLOC_FREE(utf8_filter);
1439
1440         /* Teardown timeout. */
1441         CatchSignal(SIGALRM, SIG_IGN);
1442         alarm(0);
1443
1444         if (got_alarm != 0)
1445                 return LDAP_TIMELIMIT_EXCEEDED;
1446
1447         return rc;
1448 }
1449
1450 int smbldap_search(struct smbldap_state *ldap_state,
1451                    const char *base, int scope, const char *filter,
1452                    const char *attrs[], int attrsonly,
1453                    LDAPMessage **res)
1454 {
1455         return smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1456                                   attrsonly, NULL, NULL, LDAP_NO_LIMIT, res);
1457 }
1458
1459 int smbldap_search_paged(struct smbldap_state *ldap_state,
1460                          const char *base, int scope, const char *filter,
1461                          const char **attrs, int attrsonly, int pagesize,
1462                          LDAPMessage **res, void **cookie)
1463 {
1464         LDAPControl     pr;
1465         LDAPControl     **rcontrols;
1466         LDAPControl     *controls[2] = { NULL, NULL};
1467         BerElement      *cookie_be = NULL;
1468         struct berval   *cookie_bv = NULL;
1469         int             tmp = 0, i, rc;
1470         bool            critical = True;
1471
1472         *res = NULL;
1473
1474         DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s],"
1475                  "scope => [%d], pagesize => [%d]\n",
1476                  base, filter, scope, pagesize));
1477
1478         cookie_be = ber_alloc_t(LBER_USE_DER);
1479         if (cookie_be == NULL) {
1480                 DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns "
1481                          "NULL\n"));
1482                 return LDAP_NO_MEMORY;
1483         }
1484
1485         /* construct cookie */
1486         if (*cookie != NULL) {
1487                 ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie);
1488                 ber_bvfree((struct berval *)*cookie); /* don't need it from last time */
1489                 *cookie = NULL;
1490         } else {
1491                 ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0);
1492         }
1493         ber_flatten(cookie_be, &cookie_bv);
1494
1495         pr.ldctl_oid = CONST_DISCARD(char *, ADS_PAGE_CTL_OID);
1496         pr.ldctl_iscritical = (char) critical;
1497         pr.ldctl_value.bv_len = cookie_bv->bv_len;
1498         pr.ldctl_value.bv_val = cookie_bv->bv_val;
1499
1500         controls[0] = &pr;
1501         controls[1] = NULL;
1502
1503         rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1504                                  0, controls, NULL, LDAP_NO_LIMIT, res);
1505
1506         ber_free(cookie_be, 1);
1507         ber_bvfree(cookie_bv);
1508
1509         if (rc != 0) {
1510                 DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) "
1511                          "failed with [%s]\n", filter, ldap_err2string(rc)));
1512                 goto done;
1513         }
1514
1515         DEBUG(3,("smbldap_search_paged: search was successful\n"));
1516
1517         rc = ldap_parse_result(ldap_state->ldap_struct, *res, NULL, NULL,
1518                                NULL, NULL, &rcontrols,  0);
1519         if (rc != 0) {
1520                 DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \
1521                          "with [%s]\n", ldap_err2string(rc)));
1522                 goto done;
1523         }
1524
1525         if (rcontrols == NULL)
1526                 goto done;
1527
1528         for (i=0; rcontrols[i]; i++) {
1529
1530                 if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0)
1531                         continue;
1532
1533                 cookie_be = ber_init(&rcontrols[i]->ldctl_value);
1534                 ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv);
1535                 /* the berval is the cookie, but must be freed when it is all
1536                    done */
1537                 if (cookie_bv->bv_len)
1538                         *cookie=ber_bvdup(cookie_bv);
1539                 else
1540                         *cookie=NULL;
1541                 ber_bvfree(cookie_bv);
1542                 ber_free(cookie_be, 1);
1543                 break;
1544         }
1545         ldap_controls_free(rcontrols);
1546 done:
1547         return rc;
1548 }
1549
1550 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1551 {
1552         int             rc = LDAP_SERVER_DOWN;
1553         int             attempts = 0;
1554         char           *utf8_dn;
1555         time_t          endtime = time_mono(NULL)+lp_ldap_timeout();
1556         size_t          converted_size;
1557
1558         SMB_ASSERT(ldap_state);
1559
1560         DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1561
1562         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1563                 return LDAP_NO_MEMORY;
1564         }
1565
1566         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1567                 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1568                 if (rc != LDAP_SUCCESS) {
1569                         char *ld_error = NULL;
1570                         int ld_errno;
1571
1572                         ldap_get_option(ldap_state->ldap_struct,
1573                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1574
1575                         ldap_get_option(ldap_state->ldap_struct,
1576                                         LDAP_OPT_ERROR_STRING, &ld_error);
1577                         DEBUG(10, ("Failed to modify dn: %s, error: %d (%s) "
1578                                    "(%s)\n", dn, ld_errno,
1579                                    ldap_err2string(rc),
1580                                    ld_error ? ld_error : "unknown"));
1581                         SAFE_FREE(ld_error);
1582
1583                         if (ld_errno == LDAP_SERVER_DOWN) {
1584                                 ldap_unbind(ldap_state->ldap_struct);
1585                                 ldap_state->ldap_struct = NULL;
1586                         }
1587                 }
1588         }
1589
1590         TALLOC_FREE(utf8_dn);
1591         return rc;
1592 }
1593
1594 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1595 {
1596         int             rc = LDAP_SERVER_DOWN;
1597         int             attempts = 0;
1598         char           *utf8_dn;
1599         time_t          endtime = time_mono(NULL)+lp_ldap_timeout();
1600         size_t          converted_size;
1601
1602         SMB_ASSERT(ldap_state);
1603
1604         DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1605
1606         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1607                 return LDAP_NO_MEMORY;
1608         }
1609
1610         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1611                 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1612                 if (rc != LDAP_SUCCESS) {
1613                         char *ld_error = NULL;
1614                         int ld_errno;
1615
1616                         ldap_get_option(ldap_state->ldap_struct,
1617                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1618
1619                         ldap_get_option(ldap_state->ldap_struct,
1620                                         LDAP_OPT_ERROR_STRING, &ld_error);
1621                         DEBUG(10, ("Failed to add dn: %s, error: %d (%s) "
1622                                    "(%s)\n", dn, ld_errno,
1623                                    ldap_err2string(rc),
1624                                    ld_error ? ld_error : "unknown"));
1625                         SAFE_FREE(ld_error);
1626
1627                         if (ld_errno == LDAP_SERVER_DOWN) {
1628                                 ldap_unbind(ldap_state->ldap_struct);
1629                                 ldap_state->ldap_struct = NULL;
1630                         }
1631                 }
1632         }
1633
1634         TALLOC_FREE(utf8_dn);
1635         return rc;
1636 }
1637
1638 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1639 {
1640         int             rc = LDAP_SERVER_DOWN;
1641         int             attempts = 0;
1642         char           *utf8_dn;
1643         time_t          endtime = time_mono(NULL)+lp_ldap_timeout();
1644         size_t          converted_size;
1645
1646         SMB_ASSERT(ldap_state);
1647
1648         DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1649
1650         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1651                 return LDAP_NO_MEMORY;
1652         }
1653
1654         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1655                 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1656                 if (rc != LDAP_SUCCESS) {
1657                         char *ld_error = NULL;
1658                         int ld_errno;
1659
1660                         ldap_get_option(ldap_state->ldap_struct,
1661                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1662
1663                         ldap_get_option(ldap_state->ldap_struct,
1664                                         LDAP_OPT_ERROR_STRING, &ld_error);
1665                         DEBUG(10, ("Failed to delete dn: %s, error: %d (%s) "
1666                                    "(%s)\n", dn, ld_errno,
1667                                    ldap_err2string(rc),
1668                                    ld_error ? ld_error : "unknown"));
1669                         SAFE_FREE(ld_error);
1670
1671                         if (ld_errno == LDAP_SERVER_DOWN) {
1672                                 ldap_unbind(ldap_state->ldap_struct);
1673                                 ldap_state->ldap_struct = NULL;
1674                         }
1675                 }
1676         }
1677
1678         TALLOC_FREE(utf8_dn);
1679         return rc;
1680 }
1681
1682 int smbldap_extended_operation(struct smbldap_state *ldap_state,
1683                                LDAP_CONST char *reqoid, struct berval *reqdata,
1684                                LDAPControl **serverctrls, LDAPControl **clientctrls,
1685                                char **retoidp, struct berval **retdatap)
1686 {
1687         int             rc = LDAP_SERVER_DOWN;
1688         int             attempts = 0;
1689         time_t          endtime = time_mono(NULL)+lp_ldap_timeout();
1690
1691         if (!ldap_state)
1692                 return (-1);
1693
1694         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1695                 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
1696                                                reqdata, serverctrls,
1697                                                clientctrls, retoidp, retdatap);
1698                 if (rc != LDAP_SUCCESS) {
1699                         char *ld_error = NULL;
1700                         int ld_errno;
1701
1702                         ldap_get_option(ldap_state->ldap_struct,
1703                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1704
1705                         ldap_get_option(ldap_state->ldap_struct,
1706                                         LDAP_OPT_ERROR_STRING, &ld_error);
1707                         DEBUG(10, ("Extended operation failed with error: "
1708                                    "%d (%s) (%s)\n", ld_errno,
1709                                    ldap_err2string(rc),
1710                                    ld_error ? ld_error : "unknown"));
1711                         SAFE_FREE(ld_error);
1712
1713                         if (ld_errno == LDAP_SERVER_DOWN) {
1714                                 ldap_unbind(ldap_state->ldap_struct);
1715                                 ldap_state->ldap_struct = NULL;
1716                         }
1717                 }
1718         }
1719
1720         return rc;
1721 }
1722
1723 /*******************************************************************
1724  run the search by name.
1725 ******************************************************************/
1726 int smbldap_search_suffix (struct smbldap_state *ldap_state,
1727                            const char *filter, const char **search_attr,
1728                            LDAPMessage ** result)
1729 {
1730         return smbldap_search(ldap_state, lp_ldap_suffix(), LDAP_SCOPE_SUBTREE,
1731                               filter, search_attr, 0, result);
1732 }
1733
1734 static void smbldap_idle_fn(struct event_context *event_ctx,
1735                             struct timed_event *te,
1736                             struct timeval now_abs,
1737                             void *private_data)
1738 {
1739         struct smbldap_state *state = (struct smbldap_state *)private_data;
1740
1741         TALLOC_FREE(state->idle_event);
1742
1743         if (state->ldap_struct == NULL) {
1744                 DEBUG(10,("ldap connection not connected...\n"));
1745                 return;
1746         }
1747
1748         if ((state->last_use+SMBLDAP_IDLE_TIME) > time_mono(NULL)) {
1749                 DEBUG(10,("ldap connection not idle...\n"));
1750
1751                 /* this needs to be made monotonic clock aware inside tevent: */
1752                 state->idle_event = event_add_timed(
1753                         event_ctx, NULL,
1754                         timeval_add(&now_abs, SMBLDAP_IDLE_TIME, 0),
1755                         smbldap_idle_fn,
1756                         private_data);
1757                 return;
1758         }
1759
1760         DEBUG(7,("ldap connection idle...closing connection\n"));
1761         smbldap_close(state);
1762 }
1763
1764 /**********************************************************************
1765  Housekeeping
1766  *********************************************************************/
1767
1768 void smbldap_free_struct(struct smbldap_state **ldap_state)
1769 {
1770         smbldap_close(*ldap_state);
1771
1772         if ((*ldap_state)->bind_secret) {
1773                 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1774         }
1775
1776         SAFE_FREE((*ldap_state)->bind_dn);
1777         SAFE_FREE((*ldap_state)->bind_secret);
1778
1779         TALLOC_FREE((*ldap_state)->idle_event);
1780
1781         *ldap_state = NULL;
1782
1783         /* No need to free any further, as it is talloc()ed */
1784 }
1785
1786
1787 /**********************************************************************
1788  Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1789  *********************************************************************/
1790
1791 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, struct event_context *event_ctx,
1792                       const char *location,
1793                       struct smbldap_state **smbldap_state)
1794 {
1795         *smbldap_state = TALLOC_ZERO_P(mem_ctx, struct smbldap_state);
1796         if (!*smbldap_state) {
1797                 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1798                 return NT_STATUS_NO_MEMORY;
1799         }
1800
1801         if (location) {
1802                 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1803         } else {
1804                 (*smbldap_state)->uri = "ldap://localhost";
1805         }
1806
1807         (*smbldap_state)->event_context = event_ctx;
1808
1809         return NT_STATUS_OK;
1810 }
1811
1812  char *smbldap_talloc_dn(TALLOC_CTX *mem_ctx, LDAP *ld,
1813                          LDAPMessage *entry)
1814 {
1815         char *utf8_dn, *unix_dn;
1816         size_t converted_size;
1817
1818         utf8_dn = ldap_get_dn(ld, entry);
1819         if (!utf8_dn) {
1820                 DEBUG (5, ("smbldap_talloc_dn: ldap_get_dn failed\n"));
1821                 return NULL;
1822         }
1823         if (!pull_utf8_talloc(mem_ctx, &unix_dn, utf8_dn, &converted_size)) {
1824                 DEBUG (0, ("smbldap_talloc_dn: String conversion failure utf8 "
1825                            "[%s]\n", utf8_dn));
1826                 return NULL;
1827         }
1828         ldap_memfree(utf8_dn);
1829         return unix_dn;
1830 }
1831
1832 /*******************************************************************
1833  Check if root-dse has a certain Control or Extension
1834 ********************************************************************/
1835
1836 static bool smbldap_check_root_dse(LDAP *ld, const char **attrs, const char *value)
1837 {
1838         LDAPMessage *msg = NULL;
1839         LDAPMessage *entry = NULL;
1840         char **values = NULL;
1841         int rc, num_result, num_values, i;
1842         bool result = False;
1843
1844         if (!attrs[0]) {
1845                 DEBUG(3,("smbldap_check_root_dse: nothing to look for\n"));
1846                 return False;
1847         }
1848
1849         if (!strequal(attrs[0], "supportedExtension") &&
1850             !strequal(attrs[0], "supportedControl") &&
1851             !strequal(attrs[0], "namingContexts")) {
1852                 DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0]));
1853                 return False;
1854         }
1855
1856         rc = ldap_search_s(ld, "", LDAP_SCOPE_BASE,
1857                            "(objectclass=*)", CONST_DISCARD(char **, attrs), 0 , &msg);
1858
1859         if (rc != LDAP_SUCCESS) {
1860                 DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n"));
1861                 return False;
1862         }
1863
1864         num_result = ldap_count_entries(ld, msg);
1865
1866         if (num_result != 1) {
1867                 DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result));
1868                 goto done;
1869         }
1870
1871         entry = ldap_first_entry(ld, msg);
1872
1873         if (entry == NULL) {
1874                 DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n"));
1875                 goto done;
1876         }
1877
1878         values = ldap_get_values(ld, entry, attrs[0]);
1879
1880         if (values == NULL) {
1881                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0]));
1882                 goto done;
1883         }
1884
1885         num_values = ldap_count_values(values);
1886
1887         if (num_values == 0) {
1888                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0]));
1889                 goto done;
1890         }
1891
1892         for (i=0; i<num_values; i++) {
1893                 if (strcmp(values[i], value) == 0)
1894                         result = True;
1895         }
1896
1897
1898  done:
1899         if (values != NULL)
1900                 ldap_value_free(values);
1901         if (msg != NULL)
1902                 ldap_msgfree(msg);
1903
1904         return result;
1905
1906 }
1907
1908 /*******************************************************************
1909  Check if LDAP-Server supports a certain Control (OID in string format)
1910 ********************************************************************/
1911
1912 bool smbldap_has_control(LDAP *ld, const char *control)
1913 {
1914         const char *attrs[] = { "supportedControl", NULL };
1915         return smbldap_check_root_dse(ld, attrs, control);
1916 }
1917
1918 /*******************************************************************
1919  Check if LDAP-Server supports a certain Extension (OID in string format)
1920 ********************************************************************/
1921
1922 bool smbldap_has_extension(LDAP *ld, const char *extension)
1923 {
1924         const char *attrs[] = { "supportedExtension", NULL };
1925         return smbldap_check_root_dse(ld, attrs, extension);
1926 }
1927
1928 /*******************************************************************
1929  Check if LDAP-Server holds a given namingContext
1930 ********************************************************************/
1931
1932 bool smbldap_has_naming_context(LDAP *ld, const char *naming_context)
1933 {
1934         const char *attrs[] = { "namingContexts", NULL };
1935         return smbldap_check_root_dse(ld, attrs, naming_context);
1936 }
1937
1938 bool smbldap_set_creds(struct smbldap_state *ldap_state, bool anon, const char *dn, const char *secret)
1939 {
1940         ldap_state->anonymous = anon;
1941
1942         /* free any previously set credential */
1943
1944         SAFE_FREE(ldap_state->bind_dn);
1945         if (ldap_state->bind_secret) {
1946                 /* make sure secrets are zeroed out of memory */
1947                 memset(ldap_state->bind_secret, '\0', strlen(ldap_state->bind_secret));
1948                 SAFE_FREE(ldap_state->bind_secret);
1949         }
1950
1951         if ( ! anon) {
1952                 ldap_state->bind_dn = SMB_STRDUP(dn);
1953                 ldap_state->bind_secret = SMB_STRDUP(secret);
1954         }
1955
1956         return True;
1957 }