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
  29 /* Try not to hit the up or down server forever */
  30
  31 #define SMBLDAP_DONT_PING_TIME 10       /* ping only all 10 seconds */
  32 #define SMBLDAP_NUM_RETRIES 8           /* retry only 8 times */
  33
  34 #define SMBLDAP_IDLE_TIME 150           /* After 2.5 minutes disconnect */
  35
  36
  37 /* attributes used by Samba 2.2 */
  38
  39 ATTRIB_MAP_ENTRY attrib_map_v22[] = {
  40         { LDAP_ATTR_UID,                "uid"           },
  41         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
  42         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
  43         { LDAP_ATTR_UNIX_HOME,          "homeDirectory" },
  44         { LDAP_ATTR_PWD_LAST_SET,       "pwdLastSet"    },
  45         { LDAP_ATTR_PWD_CAN_CHANGE,     "pwdCanChange"  },
  46         { LDAP_ATTR_PWD_MUST_CHANGE,    "pwdMustChange" },
  47         { LDAP_ATTR_LOGON_TIME,         "logonTime"     },
  48         { LDAP_ATTR_LOGOFF_TIME,        "logoffTime"    },
  49         { LDAP_ATTR_KICKOFF_TIME,       "kickoffTime"   },
  50         { LDAP_ATTR_CN,                 "cn"            },
  51         { LDAP_ATTR_SN,                 "sn"            },
  52         { LDAP_ATTR_DISPLAY_NAME,       "displayName"   },
  53         { LDAP_ATTR_HOME_PATH,          "smbHome"       },
  54         { LDAP_ATTR_HOME_DRIVE,         "homeDrive"     },
  55         { LDAP_ATTR_LOGON_SCRIPT,       "scriptPath"    },
  56         { LDAP_ATTR_PROFILE_PATH,       "profilePath"   },
  57         { LDAP_ATTR_DESC,               "description"   },
  58         { LDAP_ATTR_USER_WKS,           "userWorkstations"},
  59         { LDAP_ATTR_USER_RID,           "rid"           },
  60         { LDAP_ATTR_PRIMARY_GROUP_RID,  "primaryGroupID"},
  61         { LDAP_ATTR_LMPW,               "lmPassword"    },
  62         { LDAP_ATTR_NTPW,               "ntPassword"    },
  63         { LDAP_ATTR_DOMAIN,             "domain"        },
  64         { LDAP_ATTR_OBJCLASS,           "objectClass"   },
  65         { LDAP_ATTR_ACB_INFO,           "acctFlags"     },
  66         { LDAP_ATTR_MOD_TIMESTAMP,      "modifyTimestamp"       },
  67         { LDAP_ATTR_LIST_END,           NULL            }
  68 };
  69
  70 ATTRIB_MAP_ENTRY attrib_map_to_delete_v22[] = {
  71         { LDAP_ATTR_PWD_LAST_SET,       "pwdLastSet"    },
  72         { LDAP_ATTR_PWD_CAN_CHANGE,     "pwdCanChange"  },
  73         { LDAP_ATTR_PWD_MUST_CHANGE,    "pwdMustChange" },
  74         { LDAP_ATTR_LOGON_TIME,         "logonTime"     },
  75         { LDAP_ATTR_LOGOFF_TIME,        "logoffTime"    },
  76         { LDAP_ATTR_KICKOFF_TIME,       "kickoffTime"   },
  77         { LDAP_ATTR_DISPLAY_NAME,       "displayName"   },
  78         { LDAP_ATTR_HOME_PATH,          "smbHome"       },
  79         { LDAP_ATTR_HOME_DRIVE,         "homeDrives"    },
  80         { LDAP_ATTR_LOGON_SCRIPT,       "scriptPath"    },
  81         { LDAP_ATTR_PROFILE_PATH,       "profilePath"   },
  82         { LDAP_ATTR_USER_WKS,           "userWorkstations"},
  83         { LDAP_ATTR_USER_RID,           "rid"           },
  84         { LDAP_ATTR_PRIMARY_GROUP_RID,  "primaryGroupID"},
  85         { LDAP_ATTR_LMPW,               "lmPassword"    },
  86         { LDAP_ATTR_NTPW,               "ntPassword"    },
  87         { LDAP_ATTR_DOMAIN,             "domain"        },
  88         { LDAP_ATTR_ACB_INFO,           "acctFlags"     },
  89         { LDAP_ATTR_LIST_END,           NULL            }
  90 };
  91
  92 /* attributes used by Samba 3.0's sambaSamAccount */
  93
  94 ATTRIB_MAP_ENTRY attrib_map_v30[] = {
  95         { LDAP_ATTR_UID,                "uid"                   },
  96         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
  97         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
  98         { LDAP_ATTR_UNIX_HOME,          "homeDirectory"         },
  99         { LDAP_ATTR_PWD_LAST_SET,       "sambaPwdLastSet"       },
 100         { LDAP_ATTR_PWD_CAN_CHANGE,     "sambaPwdCanChange"     },
 101         { LDAP_ATTR_PWD_MUST_CHANGE,    "sambaPwdMustChange"    },
 102         { LDAP_ATTR_LOGON_TIME,         "sambaLogonTime"        },
 103         { LDAP_ATTR_LOGOFF_TIME,        "sambaLogoffTime"       },
 104         { LDAP_ATTR_KICKOFF_TIME,       "sambaKickoffTime"      },
 105         { LDAP_ATTR_CN,                 "cn"                    },
 106         { LDAP_ATTR_SN,                 "sn"                    },
 107         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 108         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
 109         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
 110         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
 111         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
 112         { LDAP_ATTR_DESC,               "description"           },
 113         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
 114         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
 115         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
 116         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
 117         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
 118         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 119         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 120         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
 121         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
 122         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
 123         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
 124         { LDAP_ATTR_PWD_HISTORY,        "sambaPasswordHistory"  },
 125         { LDAP_ATTR_MOD_TIMESTAMP,      "modifyTimestamp"       },
 126         { LDAP_ATTR_LOGON_HOURS,        "sambaLogonHours"       },
 127         { LDAP_ATTR_LIST_END,           NULL                    }
 128 };
 129
 130 ATTRIB_MAP_ENTRY attrib_map_to_delete_v30[] = {
 131         { LDAP_ATTR_PWD_LAST_SET,       "sambaPwdLastSet"       },
 132         { LDAP_ATTR_PWD_CAN_CHANGE,     "sambaPwdCanChange"     },
 133         { LDAP_ATTR_PWD_MUST_CHANGE,    "sambaPwdMustChange"    },
 134         { LDAP_ATTR_LOGON_TIME,         "sambaLogonTime"        },
 135         { LDAP_ATTR_LOGOFF_TIME,        "sambaLogoffTime"       },
 136         { LDAP_ATTR_KICKOFF_TIME,       "sambaKickoffTime"      },
 137         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 138         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
 139         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
 140         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
 141         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
 142         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
 143         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
 144         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
 145         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
 146         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
 147         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 148         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
 149         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
 150         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
 151         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
 152         { LDAP_ATTR_PWD_HISTORY,        "sambaPasswordHistory"  },
 153         { LDAP_ATTR_LOGON_HOURS,        "sambaLogonHours"       },
 154         { LDAP_ATTR_LIST_END,           NULL                    }
 155 };
 156
 157 /* attributes used for allocating RIDs */
 158
 159 ATTRIB_MAP_ENTRY dominfo_attr_list[] = {
 160         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 161         { LDAP_ATTR_NEXT_RID,           "sambaNextRid"          },
 162         { LDAP_ATTR_NEXT_USERRID,       "sambaNextUserRid"      },
 163         { LDAP_ATTR_NEXT_GROUPRID,      "sambaNextGroupRid"     },
 164         { LDAP_ATTR_DOM_SID,            LDAP_ATTRIBUTE_SID      },
 165         { LDAP_ATTR_ALGORITHMIC_RID_BASE,"sambaAlgorithmicRidBase"},
 166         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 167         { LDAP_ATTR_LIST_END,           NULL                    },
 168 };
 169
 170 /* Samba 3.0 group mapping attributes */
 171
 172 ATTRIB_MAP_ENTRY groupmap_attr_list[] = {
 173         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 174         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
 175         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
 176         { LDAP_ATTR_SID_LIST,           "sambaSIDList"          },
 177         { LDAP_ATTR_DESC,               "description"           },
 178         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 179         { LDAP_ATTR_CN,                 "cn"                    },
 180         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 181         { LDAP_ATTR_LIST_END,           NULL                    }
 182 };
 183
 184 ATTRIB_MAP_ENTRY groupmap_attr_list_to_delete[] = {
 185         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
 186         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
 187         { LDAP_ATTR_DESC,               "description"           },
 188         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 189         { LDAP_ATTR_SID_LIST,           "sambaSIDList"          },
 190         { LDAP_ATTR_LIST_END,           NULL                    }
 191 };
 192
 193 /* idmap_ldap sambaUnixIdPool */
 194
 195 ATTRIB_MAP_ENTRY idpool_attr_list[] = {
 196         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 197         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 198         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 199         { LDAP_ATTR_LIST_END,           NULL                    }
 200 };
 201
 202 ATTRIB_MAP_ENTRY sidmap_attr_list[] = {
 203         { LDAP_ATTR_SID,                LDAP_ATTRIBUTE_SID      },
 204         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 205         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 206         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 207         { LDAP_ATTR_LIST_END,           NULL                    }
 208 };
 209
 210 /**********************************************************************
 211  perform a simple table lookup and return the attribute name
 212  **********************************************************************/
 213
 214  const char* get_attr_key2string( ATTRIB_MAP_ENTRY table[], int key )
 215 {
 216         int i = 0;
 217
 218         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
 219                 if ( table[i].attrib == key )
 220                         return table[i].name;
 221                 i++;
 222         }
 223
 224         return NULL;
 225 }
 226
 227
 228 /**********************************************************************
 229  Return the list of attribute names from a mapping table
 230  **********************************************************************/
 231
 232  const char** get_attr_list( TALLOC_CTX *mem_ctx, ATTRIB_MAP_ENTRY table[] )
 233 {
 234         const char **names;
 235         int i = 0;
 236
 237         while ( table[i].attrib != LDAP_ATTR_LIST_END )
 238                 i++;
 239         i++;
 240
 241         names = TALLOC_ARRAY( mem_ctx, const char*, i );
 242         if ( !names ) {
 243                 DEBUG(0,("get_attr_list: out of memory\n"));
 244                 return NULL;
 245         }
 246
 247         i = 0;
 248         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
 249                 names[i] = talloc_strdup( names, table[i].name );
 250                 i++;
 251         }
 252         names[i] = NULL;
 253
 254         return names;
 255 }
 256
 257 /*******************************************************************
 258  Search an attribute and return the first value found.
 259 ******************************************************************/
 260
 261  bool smbldap_get_single_attribute (LDAP * ldap_struct, LDAPMessage * entry,
 262                                     const char *attribute, char *value,
 263                                     int max_len)
 264 {
 265         char **values;
 266
 267         if ( !attribute )
 268                 return False;
 269
 270         value[0] = '\0';
 271
 272         if ((values = ldap_get_values (ldap_struct, entry, attribute)) == NULL) {
 273                 DEBUG (10, ("smbldap_get_single_attribute: [%s] = [<does not exist>]\n", attribute));
 274
 275                 return False;
 276         }
 277
 278         if (convert_string(CH_UTF8, CH_UNIX,values[0], -1, value, max_len, False) == (size_t)-1) {
 279                 DEBUG(1, ("smbldap_get_single_attribute: string conversion of [%s] = [%s] failed!\n",
 280                           attribute, values[0]));
 281                 ldap_value_free(values);
 282                 return False;
 283         }
 284
 285         ldap_value_free(values);
 286 #ifdef DEBUG_PASSWORDS
 287         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n", attribute, value));
 288 #endif
 289         return True;
 290 }
 291
 292  char * smbldap_talloc_single_attribute(LDAP *ldap_struct, LDAPMessage *entry,
 293                                         const char *attribute,
 294                                         TALLOC_CTX *mem_ctx)
 295 {
 296         char **values;
 297         char *result;
 298         size_t converted_size;
 299
 300         if (attribute == NULL) {
 301                 return NULL;
 302         }
 303
 304         values = ldap_get_values(ldap_struct, entry, attribute);
 305
 306         if (values == NULL) {
 307                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 308                 return NULL;
 309         }
 310
 311         if (ldap_count_values(values) != 1) {
 312                 DEBUG(10, ("attribute %s has %d values, expected only one\n",
 313                            attribute, ldap_count_values(values)));
 314                 ldap_value_free(values);
 315                 return NULL;
 316         }
 317
 318         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
 319                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 320                 ldap_value_free(values);
 321                 return NULL;
 322         }
 323
 324         ldap_value_free(values);
 325
 326 #ifdef DEBUG_PASSWORDS
 327         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
 328                      attribute, result));
 329 #endif
 330         return result;
 331 }
 332
 333  char * smbldap_talloc_first_attribute(LDAP *ldap_struct, LDAPMessage *entry,
 334                                        const char *attribute,
 335                                        TALLOC_CTX *mem_ctx)
 336 {
 337         char **values;
 338         char *result;
 339         size_t converted_size;
 340
 341         if (attribute == NULL) {
 342                 return NULL;
 343         }
 344
 345         values = ldap_get_values(ldap_struct, entry, attribute);
 346
 347         if (values == NULL) {
 348                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 349                 return NULL;
 350         }
 351
 352         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
 353                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 354                 ldap_value_free(values);
 355                 return NULL;
 356         }
 357
 358         ldap_value_free(values);
 359
 360 #ifdef DEBUG_PASSWORDS
 361         DEBUG (100, ("smbldap_get_first_attribute: [%s] = [%s]\n",
 362                      attribute, result));
 363 #endif
 364         return result;
 365 }
 366
 367  char * smbldap_talloc_smallest_attribute(LDAP *ldap_struct, LDAPMessage *entry,
 368                                           const char *attribute,
 369                                           TALLOC_CTX *mem_ctx)
 370 {
 371         char **values;
 372         char *result;
 373         size_t converted_size;
 374         int i, num_values;
 375
 376         if (attribute == NULL) {
 377                 return NULL;
 378         }
 379
 380         values = ldap_get_values(ldap_struct, entry, attribute);
 381
 382         if (values == NULL) {
 383                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 384                 return NULL;
 385         }
 386
 387         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
 388                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 389                 ldap_value_free(values);
 390                 return NULL;
 391         }
 392
 393         num_values = ldap_count_values(values);
 394
 395         for (i=1; i<num_values; i++) {
 396                 char *tmp;
 397
 398                 if (!pull_utf8_talloc(mem_ctx, &tmp, values[i],
 399                                       &converted_size)) {
 400                         DEBUG(10, ("pull_utf8_talloc failed\n"));
 401                         TALLOC_FREE(result);
 402                         ldap_value_free(values);
 403                         return NULL;
 404                 }
 405
 406                 if (StrCaseCmp(tmp, result) < 0) {
 407                         TALLOC_FREE(result);
 408                         result = tmp;
 409                 } else {
 410                         TALLOC_FREE(tmp);
 411                 }
 412         }
 413
 414         ldap_value_free(values);
 415
 416 #ifdef DEBUG_PASSWORDS
 417         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
 418                      attribute, result));
 419 #endif
 420         return result;
 421 }
 422
 423  bool smbldap_talloc_single_blob(TALLOC_CTX *mem_ctx, LDAP *ld,
 424                                  LDAPMessage *msg, const char *attrib,
 425                                  DATA_BLOB *blob)
 426 {
 427         struct berval **values;
 428
 429         values = ldap_get_values_len(ld, msg, attrib);
 430         if (!values) {
 431                 return false;
 432         }
 433
 434         if (ldap_count_values_len(values) != 1) {
 435                 DEBUG(10, ("Expected one value for %s, got %d\n", attrib,
 436                            ldap_count_values_len(values)));
 437                 return false;
 438         }
 439
 440         *blob = data_blob_talloc(mem_ctx, values[0]->bv_val,
 441                                  values[0]->bv_len);
 442         ldap_value_free_len(values);
 443
 444         return (blob->data != NULL);
 445 }
 446
 447  bool smbldap_pull_sid(LDAP *ld, LDAPMessage *msg, const char *attrib,
 448                        struct dom_sid *sid)
 449 {
 450         DATA_BLOB blob;
 451         bool ret;
 452
 453         if (!smbldap_talloc_single_blob(talloc_tos(), ld, msg, attrib,
 454                                         &blob)) {
 455                 return false;
 456         }
 457         ret = sid_parse((char *)blob.data, blob.length, sid);
 458         TALLOC_FREE(blob.data);
 459         return ret;
 460 }
 461
 462  static int ldapmsg_destructor(LDAPMessage **result) {
 463         ldap_msgfree(*result);
 464         return 0;
 465 }
 466
 467  void talloc_autofree_ldapmsg(TALLOC_CTX *mem_ctx, LDAPMessage *result)
 468 {
 469         LDAPMessage **handle;
 470
 471         if (result == NULL) {
 472                 return;
 473         }
 474
 475         handle = TALLOC_P(mem_ctx, LDAPMessage *);
 476         SMB_ASSERT(handle != NULL);
 477
 478         *handle = result;
 479         talloc_set_destructor(handle, ldapmsg_destructor);
 480 }
 481
 482  static int ldapmod_destructor(LDAPMod ***mod) {
 483         ldap_mods_free(*mod, True);
 484         return 0;
 485 }
 486
 487  void talloc_autofree_ldapmod(TALLOC_CTX *mem_ctx, LDAPMod **mod)
 488 {
 489         LDAPMod ***handle;
 490
 491         if (mod == NULL) {
 492                 return;
 493         }
 494
 495         handle = TALLOC_P(mem_ctx, LDAPMod **);
 496         SMB_ASSERT(handle != NULL);
 497
 498         *handle = mod;
 499         talloc_set_destructor(handle, ldapmod_destructor);
 500 }
 501
 502 /************************************************************************
 503  Routine to manage the LDAPMod structure array
 504  manage memory used by the array, by each struct, and values
 505  ***********************************************************************/
 506
 507  void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
 508 {
 509         LDAPMod **mods;
 510         int i;
 511         int j;
 512
 513         mods = *modlist;
 514
 515         /* sanity checks on the mod values */
 516
 517         if (attribute == NULL || *attribute == '\0') {
 518                 return;
 519         }
 520
 521 #if 0   /* commented out after discussion with abartlet.  Do not reenable.
 522            left here so other do not re-add similar code   --jerry */
 523         if (value == NULL || *value == '\0')
 524                 return;
 525 #endif
 526
 527         if (mods == NULL) {
 528                 mods = SMB_MALLOC_P(LDAPMod *);
 529                 if (mods == NULL) {
 530                         smb_panic("smbldap_set_mod: out of memory!");
 531                         /* notreached. */
 532                 }
 533                 mods[0] = NULL;
 534         }
 535
 536         for (i = 0; mods[i] != NULL; ++i) {
 537                 if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
 538                         break;
 539         }
 540
 541         if (mods[i] == NULL) {
 542                 mods = SMB_REALLOC_ARRAY (mods, LDAPMod *, i + 2);
 543                 if (mods == NULL) {
 544                         smb_panic("smbldap_set_mod: out of memory!");
 545                         /* notreached. */
 546                 }
 547                 mods[i] = SMB_MALLOC_P(LDAPMod);
 548                 if (mods[i] == NULL) {
 549                         smb_panic("smbldap_set_mod: out of memory!");
 550                         /* notreached. */
 551                 }
 552                 mods[i]->mod_op = modop;
 553                 mods[i]->mod_values = NULL;
 554                 mods[i]->mod_type = SMB_STRDUP(attribute);
 555                 mods[i + 1] = NULL;
 556         }
 557
 558         if (value != NULL) {
 559                 char *utf8_value = NULL;
 560                 size_t converted_size;
 561
 562                 j = 0;
 563                 if (mods[i]->mod_values != NULL) {
 564                         for (; mods[i]->mod_values[j] != NULL; j++);
 565                 }
 566                 mods[i]->mod_values = SMB_REALLOC_ARRAY(mods[i]->mod_values, char *, j + 2);
 567
 568                 if (mods[i]->mod_values == NULL) {
 569                         smb_panic("smbldap_set_mod: out of memory!");
 570                         /* notreached. */
 571                 }
 572
 573                 if (!push_utf8_talloc(talloc_tos(), &utf8_value, value, &converted_size)) {
 574                         smb_panic("smbldap_set_mod: String conversion failure!");
 575                         /* notreached. */
 576                 }
 577
 578                 mods[i]->mod_values[j] = SMB_STRDUP(utf8_value);
 579                 TALLOC_FREE(utf8_value);
 580                 SMB_ASSERT(mods[i]->mod_values[j] != NULL);
 581
 582                 mods[i]->mod_values[j + 1] = NULL;
 583         }
 584         *modlist = mods;
 585 }
 586
 587 /**********************************************************************
 588   Set attribute to newval in LDAP, regardless of what value the
 589   attribute had in LDAP before.
 590 *********************************************************************/
 591
 592  void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
 593                       LDAPMod ***mods,
 594                       const char *attribute, const char *newval)
 595 {
 596         char oldval[2048]; /* current largest allowed value is mungeddial */
 597         bool existed;
 598
 599         if (attribute == NULL) {
 600                 /* This can actually happen for ldapsam_compat where we for
 601                  * example don't have a password history */
 602                 return;
 603         }
 604
 605         if (existing != NULL) {
 606                 existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
 607         } else {
 608                 existed = False;
 609                 *oldval = '\0';
 610         }
 611
 612         /* all of our string attributes are case insensitive */
 613
 614         if (existed && newval && (StrCaseCmp(oldval, newval) == 0)) {
 615
 616                 /* Believe it or not, but LDAP will deny a delete and
 617                    an add at the same time if the values are the
 618                    same... */
 619                 DEBUG(10,("smbldap_make_mod: attribute |%s| not changed.\n", attribute));
 620                 return;
 621         }
 622
 623         if (existed) {
 624                 /* There has been no value before, so don't delete it.
 625                  * Here's a possible race: We might end up with
 626                  * duplicate attributes */
 627                 /* By deleting exactly the value we found in the entry this
 628                  * should be race-free in the sense that the LDAP-Server will
 629                  * deny the complete operation if somebody changed the
 630                  * attribute behind our back. */
 631                 /* This will also allow modifying single valued attributes
 632                  * in Novell NDS. In NDS you have to first remove attribute and then
 633                  * you could add new value */
 634
 635                 DEBUG(10,("smbldap_make_mod: deleting attribute |%s| values |%s|\n", attribute, oldval));
 636                 smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
 637         }
 638
 639         /* Regardless of the real operation (add or modify)
 640            we add the new value here. We rely on deleting
 641            the old value, should it exist. */
 642
 643         if ((newval != NULL) && (strlen(newval) > 0)) {
 644                 DEBUG(10,("smbldap_make_mod: adding attribute |%s| value |%s|\n", attribute, newval));
 645                 smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
 646         }
 647 }
 648
 649 /**********************************************************************
 650  Some varients of the LDAP rebind code do not pass in the third 'arg'
 651  pointer to a void*, so we try and work around it by assuming that the
 652  value of the 'LDAP *' pointer is the same as the one we had passed in
 653  **********************************************************************/
 654
 655 struct smbldap_state_lookup {
 656         LDAP *ld;
 657         struct smbldap_state *smbldap_state;
 658         struct smbldap_state_lookup *prev, *next;
 659 };
 660
 661 static struct smbldap_state_lookup *smbldap_state_lookup_list;
 662
 663 static struct smbldap_state *smbldap_find_state(LDAP *ld)
 664 {
 665         struct smbldap_state_lookup *t;
 666
 667         for (t = smbldap_state_lookup_list; t; t = t->next) {
 668                 if (t->ld == ld) {
 669                         return t->smbldap_state;
 670                 }
 671         }
 672         return NULL;
 673 }
 674
 675 static void smbldap_delete_state(struct smbldap_state *smbldap_state)
 676 {
 677         struct smbldap_state_lookup *t;
 678
 679         for (t = smbldap_state_lookup_list; t; t = t->next) {
 680                 if (t->smbldap_state == smbldap_state) {
 681                         DLIST_REMOVE(smbldap_state_lookup_list, t);
 682                         SAFE_FREE(t);
 683                         return;
 684                 }
 685         }
 686 }
 687
 688 static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state)
 689 {
 690         struct smbldap_state *tmp_ldap_state;
 691         struct smbldap_state_lookup *t;
 692
 693         if ((tmp_ldap_state = smbldap_find_state(ld))) {
 694                 SMB_ASSERT(tmp_ldap_state == smbldap_state);
 695                 return;
 696         }
 697
 698         t = SMB_XMALLOC_P(struct smbldap_state_lookup);
 699         ZERO_STRUCTP(t);
 700
 701         DLIST_ADD_END(smbldap_state_lookup_list, t, struct smbldap_state_lookup *);
 702         t->ld = ld;
 703         t->smbldap_state = smbldap_state;
 704 }
 705
 706 /********************************************************************
 707  start TLS on an existing LDAP connection
 708 *******************************************************************/
 709
 710 int smb_ldap_start_tls(LDAP *ldap_struct, int version)
 711 {
 712 #ifdef LDAP_OPT_X_TLS
 713         int rc;
 714 #endif
 715
 716         if (lp_ldap_ssl() != LDAP_SSL_START_TLS) {
 717                 return LDAP_SUCCESS;
 718         }
 719
 720 #ifdef LDAP_OPT_X_TLS
 721         if (version != LDAP_VERSION3) {
 722                 DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
 723                 return LDAP_OPERATIONS_ERROR;
 724         }
 725
 726         if ((rc = ldap_start_tls_s (ldap_struct, NULL, NULL)) != LDAP_SUCCESS)  {
 727                 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
 728                          ldap_err2string(rc)));
 729                 return rc;
 730         }
 731
 732         DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
 733         return LDAP_SUCCESS;
 734 #else
 735         DEBUG(0,("StartTLS not supported by LDAP client libraries!\n"));
 736         return LDAP_OPERATIONS_ERROR;
 737 #endif
 738 }
 739
 740 /********************************************************************
 741  setup a connection to the LDAP server based on a uri
 742 *******************************************************************/
 743
 744 static int smb_ldap_setup_conn(LDAP **ldap_struct, const char *uri)
 745 {
 746         int rc;
 747
 748         DEBUG(10, ("smb_ldap_setup_connection: %s\n", uri));
 749
 750 #ifdef HAVE_LDAP_INITIALIZE
 751
 752         rc = ldap_initialize(ldap_struct, uri);
 753         if (rc) {
 754                 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
 755                 return rc;
 756         }
 757
 758         if (lp_ldap_follow_referral() != Auto) {
 759                 rc = ldap_set_option(*ldap_struct, LDAP_OPT_REFERRALS,
 760                      lp_ldap_follow_referral() ? LDAP_OPT_ON : LDAP_OPT_OFF);
 761                 if (rc != LDAP_SUCCESS)
 762                         DEBUG(0, ("Failed to set LDAP_OPT_REFERRALS: %s\n",
 763                                 ldap_err2string(rc)));
 764         }
 765
 766         return LDAP_SUCCESS;
 767 #else
 768
 769         /* Parse the string manually */
 770
 771         {
 772                 int port = 0;
 773                 fstring protocol;
 774                 fstring host;
 775                 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
 776
 777
 778                 /* skip leading "URL:" (if any) */
 779                 if ( strnequal( uri, "URL:", 4 ) ) {
 780                         uri += 4;
 781                 }
 782
 783                 sscanf(uri, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
 784
 785                 if (port == 0) {
 786                         if (strequal(protocol, "ldap")) {
 787                                 port = LDAP_PORT;
 788                         } else if (strequal(protocol, "ldaps")) {
 789                                 port = LDAPS_PORT;
 790                         } else {
 791                                 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
 792                         }
 793                 }
 794
 795                 if ((*ldap_struct = ldap_init(host, port)) == NULL)     {
 796                         DEBUG(0, ("ldap_init failed !\n"));
 797                         return LDAP_OPERATIONS_ERROR;
 798                 }
 799
 800                 if (strequal(protocol, "ldaps")) {
 801 #ifdef LDAP_OPT_X_TLS
 802                         int tls = LDAP_OPT_X_TLS_HARD;
 803                         if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
 804                         {
 805                                 DEBUG(0, ("Failed to setup a TLS session\n"));
 806                         }
 807
 808                         DEBUG(3,("LDAPS option set...!\n"));
 809 #else
 810                         DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
 811                         return LDAP_OPERATIONS_ERROR;
 812 #endif /* LDAP_OPT_X_TLS */
 813                 }
 814         }
 815 #endif /* HAVE_LDAP_INITIALIZE */
 816
 817         /* now set connection timeout */
 818 #ifdef LDAP_X_OPT_CONNECT_TIMEOUT /* Netscape */
 819         {
 820                 int ct = lp_ldap_connection_timeout()*1000;
 821                 rc = ldap_set_option(*ldap_struct, LDAP_X_OPT_CONNECT_TIMEOUT, &ct);
 822                 if (rc != LDAP_SUCCESS) {
 823                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
 824                                 ct, ldap_err2string(rc)));
 825                 }
 826         }
 827 #elif defined (LDAP_OPT_NETWORK_TIMEOUT) /* OpenLDAP */
 828         {
 829                 struct timeval ct;
 830                 ct.tv_usec = 0;
 831                 ct.tv_sec = lp_ldap_connection_timeout();
 832                 rc = ldap_set_option(*ldap_struct, LDAP_OPT_NETWORK_TIMEOUT, &ct);
 833                 if (rc != LDAP_SUCCESS) {
 834                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
 835                                 (int)ct.tv_sec, ldap_err2string(rc)));
 836                 }
 837         }
 838 #endif
 839
 840         return LDAP_SUCCESS;
 841 }
 842
 843 /********************************************************************
 844  try to upgrade to Version 3 LDAP if not already, in either case return current
 845  version
 846  *******************************************************************/
 847
 848 static int smb_ldap_upgrade_conn(LDAP *ldap_struct, int *new_version)
 849 {
 850         int version;
 851         int rc;
 852
 853         /* assume the worst */
 854         *new_version = LDAP_VERSION2;
 855
 856         rc = ldap_get_option(ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 857         if (rc) {
 858                 return rc;
 859         }
 860
 861         if (version == LDAP_VERSION3) {
 862                 *new_version = LDAP_VERSION3;
 863                 return LDAP_SUCCESS;
 864         }
 865
 866         /* try upgrade */
 867         version = LDAP_VERSION3;
 868         rc = ldap_set_option (ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 869         if (rc) {
 870                 return rc;
 871         }
 872
 873         *new_version = LDAP_VERSION3;
 874         return LDAP_SUCCESS;
 875 }
 876
 877 /*******************************************************************
 878  open a connection to the ldap server (just until the bind)
 879  ******************************************************************/
 880
 881 int smb_ldap_setup_full_conn(LDAP **ldap_struct, const char *uri)
 882 {
 883         int rc, version;
 884
 885         rc = smb_ldap_setup_conn(ldap_struct, uri);
 886         if (rc) {
 887                 return rc;
 888         }
 889
 890         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 891         if (rc) {
 892                 return rc;
 893         }
 894
 895         rc = smb_ldap_start_tls(*ldap_struct, version);
 896         if (rc) {
 897                 return rc;
 898         }
 899
 900         return LDAP_SUCCESS;
 901 }
 902
 903 /*******************************************************************
 904  open a connection to the ldap server.
 905 ******************************************************************/
 906 static int smbldap_open_connection (struct smbldap_state *ldap_state)
 907
 908 {
 909         int rc = LDAP_SUCCESS;
 910         int version;
 911         int deref;
 912         LDAP **ldap_struct = &ldap_state->ldap_struct;
 913
 914         rc = smb_ldap_setup_conn(ldap_struct, ldap_state->uri);
 915         if (rc) {
 916                 return rc;
 917         }
 918
 919         /* Store the LDAP pointer in a lookup list */
 920
 921         smbldap_store_state(*ldap_struct, ldap_state);
 922
 923         /* Upgrade to LDAPv3 if possible */
 924
 925         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 926         if (rc) {
 927                 return rc;
 928         }
 929
 930         /* Start TLS if required */
 931
 932         rc = smb_ldap_start_tls(*ldap_struct, version);
 933         if (rc) {
 934                 return rc;
 935         }
 936
 937         /* Set alias dereferencing method */
 938         deref = lp_ldap_deref();
 939         if (deref != -1) {
 940                 if (ldap_set_option (*ldap_struct, LDAP_OPT_DEREF, &deref) != LDAP_OPT_SUCCESS) {
 941                         DEBUG(1,("smbldap_open_connection: Failed to set dereferencing method: %d\n", deref));
 942                 } else {
 943                         DEBUG(5,("Set dereferencing method: %d\n", deref));
 944                 }
 945         }
 946
 947         DEBUG(2, ("smbldap_open_connection: connection opened\n"));
 948         return rc;
 949 }
 950
 951 /*******************************************************************
 952  a rebind function for authenticated referrals
 953  This version takes a void* that we can shove useful stuff in :-)
 954 ******************************************************************/
 955 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 956 #else
 957 static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp,
 958                                    int *methodp, int freeit, void *arg)
 959 {
 960         struct smbldap_state *ldap_state = arg;
 961         struct timespec ts;
 962
 963         /** @TODO Should we be doing something to check what servers we rebind to?
 964             Could we get a referral to a machine that we don't want to give our
 965             username and password to? */
 966
 967         if (freeit) {
 968                 SAFE_FREE(*whop);
 969                 if (*credp) {
 970                         memset(*credp, '\0', strlen(*credp));
 971                 }
 972                 SAFE_FREE(*credp);
 973         } else {
 974                 DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n",
 975                           ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
 976
 977                 if (ldap_state->anonymous) {
 978                         *whop = NULL;
 979                         *credp = NULL;
 980                 } else {
 981                         *whop = SMB_STRDUP(ldap_state->bind_dn);
 982                         if (!*whop) {
 983                                 return LDAP_NO_MEMORY;
 984                         }
 985                         *credp = SMB_STRDUP(ldap_state->bind_secret);
 986                         if (!*credp) {
 987                                 SAFE_FREE(*whop);
 988                                 return LDAP_NO_MEMORY;
 989                         }
 990                 }
 991                 *methodp = LDAP_AUTH_SIMPLE;
 992         }
 993
 994         clock_gettime_mono(&ts);
 995         ldap_state->last_rebind = convert_timespec_to_timeval(ts);
 996
 997         return 0;
 998 }
 999 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1000
1001 /*******************************************************************
1002  a rebind function for authenticated referrals
1003  This version takes a void* that we can shove useful stuff in :-)
1004  and actually does the connection.
1005 ******************************************************************/
1006 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1007 static int rebindproc_connect_with_state (LDAP *ldap_struct,
1008                                           LDAP_CONST char *url,
1009                                           ber_tag_t request,
1010                                           ber_int_t msgid, void *arg)
1011 {
1012         struct smbldap_state *ldap_state =
1013                 (struct smbldap_state *)arg;
1014         int rc;
1015         struct timespec ts;
1016         int version;
1017
1018         DEBUG(5,("rebindproc_connect_with_state: Rebinding to %s as \"%s\"\n",
1019                  url, ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
1020
1021         /* call START_TLS again (ldaps:// is handled by the OpenLDAP library
1022          * itself) before rebinding to another LDAP server to avoid to expose
1023          * our credentials. At least *try* to secure the connection - Guenther */
1024
1025         smb_ldap_upgrade_conn(ldap_struct, &version);
1026         smb_ldap_start_tls(ldap_struct, version);
1027
1028         /** @TODO Should we be doing something to check what servers we rebind to?
1029             Could we get a referral to a machine that we don't want to give our
1030             username and password to? */
1031
1032         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
1033
1034         /* only set the last rebind timestamp when we did rebind after a
1035          * non-read LDAP operation. That way we avoid the replication sleep
1036          * after a simple redirected search operation - Guenther */
1037
1038         switch (request) {
1039
1040                 case LDAP_REQ_MODIFY:
1041                 case LDAP_REQ_ADD:
1042                 case LDAP_REQ_DELETE:
1043                 case LDAP_REQ_MODDN:
1044                 case LDAP_REQ_EXTENDED:
1045                         DEBUG(10,("rebindproc_connect_with_state: "
1046                                 "setting last_rebind timestamp "
1047                                 "(req: 0x%02x)\n", (unsigned int)request));
1048                         clock_gettime_mono(&ts);
1049                         ldap_state->last_rebind = convert_timespec_to_timeval(ts);
1050                         break;
1051                 default:
1052                         ZERO_STRUCT(ldap_state->last_rebind);
1053                         break;
1054         }
1055
1056         return rc;
1057 }
1058 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1059
1060 /*******************************************************************
1061  Add a rebind function for authenticated referrals
1062 ******************************************************************/
1063 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1064 #else
1065 # if LDAP_SET_REBIND_PROC_ARGS == 2
1066 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
1067                        int *method, int freeit )
1068 {
1069         struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
1070
1071         return rebindproc_with_state(ldap_struct, whop, credp,
1072                                      method, freeit, ldap_state);
1073 }
1074 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
1075 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1076
1077 /*******************************************************************
1078  a rebind function for authenticated referrals
1079  this also does the connection, but no void*.
1080 ******************************************************************/
1081 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1082 # if LDAP_SET_REBIND_PROC_ARGS == 2
1083 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
1084                                ber_int_t msgid)
1085 {
1086         struct smbldap_state *ldap_state = smbldap_find_state(ld);
1087
1088         return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid,
1089                                              ldap_state);
1090 }
1091 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
1092 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1093
1094 /*******************************************************************
1095  connect to the ldap server under system privilege.
1096 ******************************************************************/
1097 static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_struct)
1098 {
1099         int rc;
1100         int version;
1101
1102         if (!ldap_state->anonymous && !ldap_state->bind_dn) {
1103                 char *bind_dn = NULL;
1104                 char *bind_secret = NULL;
1105
1106                 /* get the default dn and password only if they are not set already */
1107                 if (!fetch_ldap_pw(&bind_dn, &bind_secret)) {
1108                         DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
1109                         return LDAP_INVALID_CREDENTIALS;
1110                 }
1111                 smbldap_set_creds(ldap_state, false, bind_dn, bind_secret);
1112                 SAFE_FREE(bind_dn);
1113                 memset(bind_secret, '\0', strlen(bind_secret));
1114                 SAFE_FREE(bind_secret);
1115         }
1116
1117         /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite
1118            (OpenLDAP) doesnt' seem to support it */
1119
1120         DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
1121                   ldap_state->uri, ldap_state->bind_dn));
1122
1123 #ifdef HAVE_LDAP_SET_REBIND_PROC
1124 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1125 # if LDAP_SET_REBIND_PROC_ARGS == 2
1126         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect);
1127 # endif
1128 # if LDAP_SET_REBIND_PROC_ARGS == 3
1129         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);
1130 # endif
1131 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1132 # if LDAP_SET_REBIND_PROC_ARGS == 2
1133         ldap_set_rebind_proc(ldap_struct, &rebindproc);
1134 # endif
1135 # if LDAP_SET_REBIND_PROC_ARGS == 3
1136         ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);
1137 # endif
1138 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1139 #endif
1140
1141         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
1142
1143         if (rc != LDAP_SUCCESS) {
1144                 char *ld_error = NULL;
1145                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
1146                                 &ld_error);
1147                 DEBUG(ldap_state->num_failures ? 2 : 0,
1148                       ("failed to bind to server %s with dn=\"%s\" Error: %s\n\t%s\n",
1149                                ldap_state->uri,
1150                                ldap_state->bind_dn ? ldap_state->bind_dn : "[Anonymous bind]",
1151                                ldap_err2string(rc),
1152                                ld_error ? ld_error : "(unknown)"));
1153                 SAFE_FREE(ld_error);
1154                 ldap_state->num_failures++;
1155                 return rc;
1156         }
1157
1158         ldap_state->num_failures = 0;
1159         ldap_state->paged_results = False;
1160
1161         ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
1162
1163         if (smbldap_has_control(ldap_state->ldap_struct, ADS_PAGE_CTL_OID) && version == 3) {
1164                 ldap_state->paged_results = True;
1165         }
1166
1167         DEBUG(3, ("ldap_connect_system: successful connection to the LDAP server\n"));
1168         DEBUGADD(10, ("ldap_connect_system: LDAP server %s support paged results\n",
1169                 ldap_state->paged_results ? "does" : "does not"));
1170         return rc;
1171 }
1172
1173 static void smbldap_idle_fn(struct event_context *event_ctx,
1174                             struct timed_event *te,
1175                             struct timeval now_abs,
1176                             void *private_data);
1177
1178 /**********************************************************************
1179  Connect to LDAP server (called before every ldap operation)
1180 *********************************************************************/
1181 static int smbldap_open(struct smbldap_state *ldap_state)
1182 {
1183         int rc, opt_rc;
1184         bool reopen = False;
1185         SMB_ASSERT(ldap_state);
1186
1187         if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time_mono(NULL))) {
1188
1189 #ifdef HAVE_UNIXSOCKET
1190                 struct sockaddr_un addr;
1191 #else
1192                 struct sockaddr addr;
1193 #endif
1194                 socklen_t len = sizeof(addr);
1195                 int sd;
1196
1197                 opt_rc = ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd);
1198                 if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 )
1199                         reopen = True;
1200
1201 #ifdef HAVE_UNIXSOCKET
1202                 if (opt_rc == 0 && addr.sun_family == AF_UNIX)
1203                         reopen = True;
1204 #endif
1205                 if (reopen) {
1206                         /* the other end has died. reopen. */
1207                         ldap_unbind(ldap_state->ldap_struct);
1208                         ldap_state->ldap_struct = NULL;
1209                         ldap_state->last_ping = (time_t)0;
1210                 } else {
1211                         ldap_state->last_ping = time_mono(NULL);
1212                 }
1213         }
1214
1215         if (ldap_state->ldap_struct != NULL) {
1216                 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
1217                 return LDAP_SUCCESS;
1218         }
1219
1220         if ((rc = smbldap_open_connection(ldap_state))) {
1221                 return rc;
1222         }
1223
1224         if ((rc = smbldap_connect_system(ldap_state, ldap_state->ldap_struct))) {
1225                 ldap_unbind(ldap_state->ldap_struct);
1226                 ldap_state->ldap_struct = NULL;
1227                 return rc;
1228         }
1229
1230
1231         ldap_state->last_ping = time_mono(NULL);
1232         ldap_state->pid = sys_getpid();
1233
1234         TALLOC_FREE(ldap_state->idle_event);
1235
1236         if (ldap_state->event_context != NULL) {
1237                 ldap_state->idle_event = event_add_timed(
1238                         ldap_state->event_context, NULL,
1239                         timeval_current_ofs(SMBLDAP_IDLE_TIME, 0),
1240                         smbldap_idle_fn, ldap_state);
1241         }
1242
1243         DEBUG(4,("The LDAP server is successfully connected\n"));
1244
1245         return LDAP_SUCCESS;
1246 }
1247
1248 /**********************************************************************
1249 Disconnect from LDAP server
1250 *********************************************************************/
1251 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
1252 {
1253         if (!ldap_state)
1254                 return NT_STATUS_INVALID_PARAMETER;
1255
1256         if (ldap_state->ldap_struct != NULL) {
1257                 ldap_unbind(ldap_state->ldap_struct);
1258                 ldap_state->ldap_struct = NULL;
1259         }
1260
1261         smbldap_delete_state(ldap_state);
1262
1263         DEBUG(5,("The connection to the LDAP server was closed\n"));
1264         /* maybe free the results here --metze */
1265
1266         return NT_STATUS_OK;
1267 }
1268
1269 static bool got_alarm;
1270
1271 static void (*old_handler)(int);
1272
1273 static void gotalarm_sig(int dummy)
1274 {
1275         got_alarm = True;
1276 }
1277
1278 static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
1279                             int *attempts, time_t endtime)
1280 {
1281         time_t now = time_mono(NULL);
1282         int open_rc = LDAP_SERVER_DOWN;
1283
1284         if (*rc != LDAP_SERVER_DOWN)
1285                 goto no_next;
1286
1287         if (now >= endtime) {
1288                 smbldap_close(ldap_state);
1289                 *rc = LDAP_TIMEOUT;
1290                 goto no_next;
1291         }
1292
1293         if (*attempts == 0) {
1294                 got_alarm = False;
1295                 old_handler = CatchSignal(SIGALRM, gotalarm_sig);
1296                 alarm(endtime - now);
1297
1298                 if (ldap_state->pid != sys_getpid())
1299                         smbldap_close(ldap_state);
1300         }
1301
1302         while (1) {
1303
1304                 if (*attempts != 0)
1305                         smb_msleep(1000);
1306
1307                 *attempts += 1;
1308
1309                 open_rc = smbldap_open(ldap_state);
1310
1311                 if (open_rc == LDAP_SUCCESS) {
1312                         ldap_state->last_use = now;
1313                         return True;
1314                 }
1315
1316                 if (open_rc == LDAP_INSUFFICIENT_ACCESS) {
1317                         /* The fact that we are non-root or any other
1318                          * access-denied condition will not change in the next
1319                          * round of trying */
1320                         *rc = open_rc;
1321                         break;
1322                 }
1323
1324                 if (got_alarm) {
1325                         *rc = LDAP_TIMEOUT;
1326                         break;
1327                 }
1328
1329                 if (open_rc != LDAP_SUCCESS) {
1330                         DEBUG(1, ("Connection to LDAP server failed for the "
1331                                   "%d try!\n", *attempts));
1332                 }
1333         }
1334
1335  no_next:
1336         CatchSignal(SIGALRM, old_handler);
1337         alarm(0);
1338         ldap_state->last_use = now;
1339         return False;
1340 }
1341
1342 /*********************************************************************
1343  ********************************************************************/
1344
1345 static int smbldap_search_ext(struct smbldap_state *ldap_state,
1346                               const char *base, int scope, const char *filter,
1347                               const char *attrs[], int attrsonly,
1348                               LDAPControl **sctrls, LDAPControl **cctrls,
1349                               int sizelimit, LDAPMessage **res)
1350 {
1351         int             rc = LDAP_SERVER_DOWN;
1352         int             attempts = 0;
1353         char           *utf8_filter;
1354         time_t          endtime = time_mono(NULL)+lp_ldap_timeout();
1355         struct          timeval timeout;
1356         size_t          converted_size;
1357
1358         SMB_ASSERT(ldap_state);
1359
1360         DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], "
1361                  "scope => [%d]\n", base, filter, scope));
1362
1363         if (ldap_state->last_rebind.tv_sec > 0) {
1364                 struct timeval  tval;
1365                 struct timespec ts;
1366                 int64_t tdiff = 0;
1367                 int             sleep_time = 0;
1368
1369                 clock_gettime_mono(&ts);
1370                 tval = convert_timespec_to_timeval(ts);
1371
1372                 tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
1373                 tdiff /= 1000; /* Convert to milliseconds. */
1374
1375                 sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
1376                 sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
1377
1378                 if (sleep_time > 0) {
1379                         /* we wait for the LDAP replication */
1380                         DEBUG(5,("smbldap_search_ext: waiting %d milliseconds "
1381                                  "for LDAP replication.\n",sleep_time));
1382                         smb_msleep(sleep_time);
1383                         DEBUG(5,("smbldap_search_ext: go on!\n"));
1384                 }
1385                 ZERO_STRUCT(ldap_state->last_rebind);
1386         }
1387
1388         if (!push_utf8_talloc(talloc_tos(), &utf8_filter, filter, &converted_size)) {
1389                 return LDAP_NO_MEMORY;
1390         }
1391
1392         /* Setup timeout for the ldap_search_ext_s call - local and remote. */
1393         timeout.tv_sec = lp_ldap_timeout();
1394         timeout.tv_usec = 0;
1395
1396         /* Setup alarm timeout.... Do we need both of these ? JRA.
1397          * Yes, I think we do need both of these. The server timeout only
1398          * covers the case where the server's operation takes too long. It
1399          * does not cover the case where the request hangs on its way to the
1400          * server. The server side timeout is not strictly necessary, it's
1401          * just a bit more kind to the server. VL. */
1402
1403         got_alarm = 0;
1404         CatchSignal(SIGALRM, gotalarm_sig);
1405         alarm(lp_ldap_timeout());
1406         /* End setup timeout. */
1407
1408         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1409                 rc = ldap_search_ext_s(ldap_state->ldap_struct, base, scope,
1410                                        utf8_filter,
1411                                        CONST_DISCARD(char **, attrs),
1412                                        attrsonly, sctrls, cctrls, &timeout,
1413                                        sizelimit, res);
1414                 if (rc != LDAP_SUCCESS) {
1415                         char *ld_error = NULL;
1416                         int ld_errno;
1417
1418                         ldap_get_option(ldap_state->ldap_struct,
1419                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1420
1421                         ldap_get_option(ldap_state->ldap_struct,
1422                                         LDAP_OPT_ERROR_STRING, &ld_error);
1423                         DEBUG(10, ("Failed search for base: %s, error: %d (%s) "
1424                                    "(%s)\n", base, ld_errno,
1425                                    ldap_err2string(rc),
1426                                    ld_error ? ld_error : "unknown"));
1427                         SAFE_FREE(ld_error);
1428
1429                         if (ld_errno == LDAP_SERVER_DOWN) {
1430                                 ldap_unbind(ldap_state->ldap_struct);
1431                                 ldap_state->ldap_struct = NULL;
1432                         }
1433                 }
1434         }
1435
1436         TALLOC_FREE(utf8_filter);
1437
1438         /* Teardown timeout. */
1439         CatchSignal(SIGALRM, SIG_IGN);
1440         alarm(0);
1441
1442         if (got_alarm != 0)
1443                 return LDAP_TIMELIMIT_EXCEEDED;
1444
1445         return rc;
1446 }
1447
1448 int smbldap_search(struct smbldap_state *ldap_state,
1449                    const char *base, int scope, const char *filter,
1450                    const char *attrs[], int attrsonly,
1451                    LDAPMessage **res)
1452 {
1453         return smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1454                                   attrsonly, NULL, NULL, LDAP_NO_LIMIT, res);
1455 }
1456
1457 int smbldap_search_paged(struct smbldap_state *ldap_state,
1458                          const char *base, int scope, const char *filter,
1459                          const char **attrs, int attrsonly, int pagesize,
1460                          LDAPMessage **res, void **cookie)
1461 {
1462         LDAPControl     pr;
1463         LDAPControl     **rcontrols;
1464         LDAPControl     *controls[2] = { NULL, NULL};
1465         BerElement      *cookie_be = NULL;
1466         struct berval   *cookie_bv = NULL;
1467         int             tmp = 0, i, rc;
1468         bool            critical = True;
1469
1470         *res = NULL;
1471
1472         DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s],"
1473                  "scope => [%d], pagesize => [%d]\n",
1474                  base, filter, scope, pagesize));
1475
1476         cookie_be = ber_alloc_t(LBER_USE_DER);
1477         if (cookie_be == NULL) {
1478                 DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns "
1479                          "NULL\n"));
1480                 return LDAP_NO_MEMORY;
1481         }
1482
1483         /* construct cookie */
1484         if (*cookie != NULL) {
1485                 ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie);
1486                 ber_bvfree((struct berval *)*cookie); /* don't need it from last time */
1487                 *cookie = NULL;
1488         } else {
1489                 ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0);
1490         }
1491         ber_flatten(cookie_be, &cookie_bv);
1492
1493         pr.ldctl_oid = CONST_DISCARD(char *, ADS_PAGE_CTL_OID);
1494         pr.ldctl_iscritical = (char) critical;
1495         pr.ldctl_value.bv_len = cookie_bv->bv_len;
1496         pr.ldctl_value.bv_val = cookie_bv->bv_val;
1497
1498         controls[0] = &pr;
1499         controls[1] = NULL;
1500
1501         rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1502                                  0, controls, NULL, LDAP_NO_LIMIT, res);
1503
1504         ber_free(cookie_be, 1);
1505         ber_bvfree(cookie_bv);
1506
1507         if (rc != 0) {
1508                 DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) "
1509                          "failed with [%s]\n", filter, ldap_err2string(rc)));
1510                 goto done;
1511         }
1512
1513         DEBUG(3,("smbldap_search_paged: search was successful\n"));
1514
1515         rc = ldap_parse_result(ldap_state->ldap_struct, *res, NULL, NULL,
1516                                NULL, NULL, &rcontrols,  0);
1517         if (rc != 0) {
1518                 DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \
1519                          "with [%s]\n", ldap_err2string(rc)));
1520                 goto done;
1521         }
1522
1523         if (rcontrols == NULL)
1524                 goto done;
1525
1526         for (i=0; rcontrols[i]; i++) {
1527
1528                 if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0)
1529                         continue;
1530
1531                 cookie_be = ber_init(&rcontrols[i]->ldctl_value);
1532                 ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv);
1533                 /* the berval is the cookie, but must be freed when it is all
1534                    done */
1535                 if (cookie_bv->bv_len)
1536                         *cookie=ber_bvdup(cookie_bv);
1537                 else
1538                         *cookie=NULL;
1539                 ber_bvfree(cookie_bv);
1540                 ber_free(cookie_be, 1);
1541                 break;
1542         }
1543         ldap_controls_free(rcontrols);
1544 done:
1545         return rc;
1546 }
1547
1548 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1549 {
1550         int             rc = LDAP_SERVER_DOWN;
1551         int             attempts = 0;
1552         char           *utf8_dn;
1553         time_t          endtime = time_mono(NULL)+lp_ldap_timeout();
1554         size_t          converted_size;
1555
1556         SMB_ASSERT(ldap_state);
1557
1558         DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1559
1560         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1561                 return LDAP_NO_MEMORY;
1562         }
1563
1564         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1565                 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1566                 if (rc != LDAP_SUCCESS) {
1567                         char *ld_error = NULL;
1568                         int ld_errno;
1569
1570                         ldap_get_option(ldap_state->ldap_struct,
1571                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1572
1573                         ldap_get_option(ldap_state->ldap_struct,
1574                                         LDAP_OPT_ERROR_STRING, &ld_error);
1575                         DEBUG(10, ("Failed to modify dn: %s, error: %d (%s) "
1576                                    "(%s)\n", dn, ld_errno,
1577                                    ldap_err2string(rc),
1578                                    ld_error ? ld_error : "unknown"));
1579                         SAFE_FREE(ld_error);
1580
1581                         if (ld_errno == LDAP_SERVER_DOWN) {
1582                                 ldap_unbind(ldap_state->ldap_struct);
1583                                 ldap_state->ldap_struct = NULL;
1584                         }
1585                 }
1586         }
1587
1588         TALLOC_FREE(utf8_dn);
1589         return rc;
1590 }
1591
1592 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1593 {
1594         int             rc = LDAP_SERVER_DOWN;
1595         int             attempts = 0;
1596         char           *utf8_dn;
1597         time_t          endtime = time_mono(NULL)+lp_ldap_timeout();
1598         size_t          converted_size;
1599
1600         SMB_ASSERT(ldap_state);
1601
1602         DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1603
1604         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1605                 return LDAP_NO_MEMORY;
1606         }
1607
1608         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1609                 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1610                 if (rc != LDAP_SUCCESS) {
1611                         char *ld_error = NULL;
1612                         int ld_errno;
1613
1614                         ldap_get_option(ldap_state->ldap_struct,
1615                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1616
1617                         ldap_get_option(ldap_state->ldap_struct,
1618                                         LDAP_OPT_ERROR_STRING, &ld_error);
1619                         DEBUG(10, ("Failed to add dn: %s, error: %d (%s) "
1620                                    "(%s)\n", dn, ld_errno,
1621                                    ldap_err2string(rc),
1622                                    ld_error ? ld_error : "unknown"));
1623                         SAFE_FREE(ld_error);
1624
1625                         if (ld_errno == LDAP_SERVER_DOWN) {
1626                                 ldap_unbind(ldap_state->ldap_struct);
1627                                 ldap_state->ldap_struct = NULL;
1628                         }
1629                 }
1630         }
1631
1632         TALLOC_FREE(utf8_dn);
1633         return rc;
1634 }
1635
1636 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1637 {
1638         int             rc = LDAP_SERVER_DOWN;
1639         int             attempts = 0;
1640         char           *utf8_dn;
1641         time_t          endtime = time_mono(NULL)+lp_ldap_timeout();
1642         size_t          converted_size;
1643
1644         SMB_ASSERT(ldap_state);
1645
1646         DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1647
1648         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1649                 return LDAP_NO_MEMORY;
1650         }
1651
1652         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1653                 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1654                 if (rc != LDAP_SUCCESS) {
1655                         char *ld_error = NULL;
1656                         int ld_errno;
1657
1658                         ldap_get_option(ldap_state->ldap_struct,
1659                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1660
1661                         ldap_get_option(ldap_state->ldap_struct,
1662                                         LDAP_OPT_ERROR_STRING, &ld_error);
1663                         DEBUG(10, ("Failed to delete dn: %s, error: %d (%s) "
1664                                    "(%s)\n", dn, ld_errno,
1665                                    ldap_err2string(rc),
1666                                    ld_error ? ld_error : "unknown"));
1667                         SAFE_FREE(ld_error);
1668
1669                         if (ld_errno == LDAP_SERVER_DOWN) {
1670                                 ldap_unbind(ldap_state->ldap_struct);
1671                                 ldap_state->ldap_struct = NULL;
1672                         }
1673                 }
1674         }
1675
1676         TALLOC_FREE(utf8_dn);
1677         return rc;
1678 }
1679
1680 int smbldap_extended_operation(struct smbldap_state *ldap_state,
1681                                LDAP_CONST char *reqoid, struct berval *reqdata,
1682                                LDAPControl **serverctrls, LDAPControl **clientctrls,
1683                                char **retoidp, struct berval **retdatap)
1684 {
1685         int             rc = LDAP_SERVER_DOWN;
1686         int             attempts = 0;
1687         time_t          endtime = time_mono(NULL)+lp_ldap_timeout();
1688
1689         if (!ldap_state)
1690                 return (-1);
1691
1692         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1693                 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
1694                                                reqdata, serverctrls,
1695                                                clientctrls, retoidp, retdatap);
1696                 if (rc != LDAP_SUCCESS) {
1697                         char *ld_error = NULL;
1698                         int ld_errno;
1699
1700                         ldap_get_option(ldap_state->ldap_struct,
1701                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1702
1703                         ldap_get_option(ldap_state->ldap_struct,
1704                                         LDAP_OPT_ERROR_STRING, &ld_error);
1705                         DEBUG(10, ("Extended operation failed with error: "
1706                                    "%d (%s) (%s)\n", ld_errno,
1707                                    ldap_err2string(rc),
1708                                    ld_error ? ld_error : "unknown"));
1709                         SAFE_FREE(ld_error);
1710
1711                         if (ld_errno == LDAP_SERVER_DOWN) {
1712                                 ldap_unbind(ldap_state->ldap_struct);
1713                                 ldap_state->ldap_struct = NULL;
1714                         }
1715                 }
1716         }
1717
1718         return rc;
1719 }
1720
1721 /*******************************************************************
1722  run the search by name.
1723 ******************************************************************/
1724 int smbldap_search_suffix (struct smbldap_state *ldap_state,
1725                            const char *filter, const char **search_attr,
1726                            LDAPMessage ** result)
1727 {
1728         return smbldap_search(ldap_state, lp_ldap_suffix(), LDAP_SCOPE_SUBTREE,
1729                               filter, search_attr, 0, result);
1730 }
1731
1732 static void smbldap_idle_fn(struct event_context *event_ctx,
1733                             struct timed_event *te,
1734                             struct timeval now_abs,
1735                             void *private_data)
1736 {
1737         struct smbldap_state *state = (struct smbldap_state *)private_data;
1738
1739         TALLOC_FREE(state->idle_event);
1740
1741         if (state->ldap_struct == NULL) {
1742                 DEBUG(10,("ldap connection not connected...\n"));
1743                 return;
1744         }
1745
1746         if ((state->last_use+SMBLDAP_IDLE_TIME) > time_mono(NULL)) {
1747                 DEBUG(10,("ldap connection not idle...\n"));
1748
1749                 /* this needs to be made monotonic clock aware inside tevent: */
1750                 state->idle_event = event_add_timed(
1751                         event_ctx, NULL,
1752                         timeval_add(&now_abs, SMBLDAP_IDLE_TIME, 0),
1753                         smbldap_idle_fn,
1754                         private_data);
1755                 return;
1756         }
1757
1758         DEBUG(7,("ldap connection idle...closing connection\n"));
1759         smbldap_close(state);
1760 }
1761
1762 /**********************************************************************
1763  Housekeeping
1764  *********************************************************************/
1765
1766 void smbldap_free_struct(struct smbldap_state **ldap_state)
1767 {
1768         smbldap_close(*ldap_state);
1769
1770         if ((*ldap_state)->bind_secret) {
1771                 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1772         }
1773
1774         SAFE_FREE((*ldap_state)->bind_dn);
1775         SAFE_FREE((*ldap_state)->bind_secret);
1776
1777         TALLOC_FREE((*ldap_state)->idle_event);
1778
1779         *ldap_state = NULL;
1780
1781         /* No need to free any further, as it is talloc()ed */
1782 }
1783
1784
1785 /**********************************************************************
1786  Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1787  *********************************************************************/
1788
1789 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, struct event_context *event_ctx,
1790                       const char *location,
1791                       struct smbldap_state **smbldap_state)
1792 {
1793         *smbldap_state = TALLOC_ZERO_P(mem_ctx, struct smbldap_state);
1794         if (!*smbldap_state) {
1795                 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1796                 return NT_STATUS_NO_MEMORY;
1797         }
1798
1799         if (location) {
1800                 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1801         } else {
1802                 (*smbldap_state)->uri = "ldap://localhost";
1803         }
1804
1805         (*smbldap_state)->event_context = event_ctx;
1806
1807         return NT_STATUS_OK;
1808 }
1809
1810  char *smbldap_talloc_dn(TALLOC_CTX *mem_ctx, LDAP *ld,
1811                          LDAPMessage *entry)
1812 {
1813         char *utf8_dn, *unix_dn;
1814         size_t converted_size;
1815
1816         utf8_dn = ldap_get_dn(ld, entry);
1817         if (!utf8_dn) {
1818                 DEBUG (5, ("smbldap_talloc_dn: ldap_get_dn failed\n"));
1819                 return NULL;
1820         }
1821         if (!pull_utf8_talloc(mem_ctx, &unix_dn, utf8_dn, &converted_size)) {
1822                 DEBUG (0, ("smbldap_talloc_dn: String conversion failure utf8 "
1823                            "[%s]\n", utf8_dn));
1824                 return NULL;
1825         }
1826         ldap_memfree(utf8_dn);
1827         return unix_dn;
1828 }
1829
1830 /*******************************************************************
1831  Check if root-dse has a certain Control or Extension
1832 ********************************************************************/
1833
1834 static bool smbldap_check_root_dse(LDAP *ld, const char **attrs, const char *value)
1835 {
1836         LDAPMessage *msg = NULL;
1837         LDAPMessage *entry = NULL;
1838         char **values = NULL;
1839         int rc, num_result, num_values, i;
1840         bool result = False;
1841
1842         if (!attrs[0]) {
1843                 DEBUG(3,("smbldap_check_root_dse: nothing to look for\n"));
1844                 return False;
1845         }
1846
1847         if (!strequal(attrs[0], "supportedExtension") &&
1848             !strequal(attrs[0], "supportedControl") &&
1849             !strequal(attrs[0], "namingContexts")) {
1850                 DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0]));
1851                 return False;
1852         }
1853
1854         rc = ldap_search_s(ld, "", LDAP_SCOPE_BASE,
1855                            "(objectclass=*)", CONST_DISCARD(char **, attrs), 0 , &msg);
1856
1857         if (rc != LDAP_SUCCESS) {
1858                 DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n"));
1859                 return False;
1860         }
1861
1862         num_result = ldap_count_entries(ld, msg);
1863
1864         if (num_result != 1) {
1865                 DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result));
1866                 goto done;
1867         }
1868
1869         entry = ldap_first_entry(ld, msg);
1870
1871         if (entry == NULL) {
1872                 DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n"));
1873                 goto done;
1874         }
1875
1876         values = ldap_get_values(ld, entry, attrs[0]);
1877
1878         if (values == NULL) {
1879                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0]));
1880                 goto done;
1881         }
1882
1883         num_values = ldap_count_values(values);
1884
1885         if (num_values == 0) {
1886                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0]));
1887                 goto done;
1888         }
1889
1890         for (i=0; i<num_values; i++) {
1891                 if (strcmp(values[i], value) == 0)
1892                         result = True;
1893         }
1894
1895
1896  done:
1897         if (values != NULL)
1898                 ldap_value_free(values);
1899         if (msg != NULL)
1900                 ldap_msgfree(msg);
1901
1902         return result;
1903
1904 }
1905
1906 /*******************************************************************
1907  Check if LDAP-Server supports a certain Control (OID in string format)
1908 ********************************************************************/
1909
1910 bool smbldap_has_control(LDAP *ld, const char *control)
1911 {
1912         const char *attrs[] = { "supportedControl", NULL };
1913         return smbldap_check_root_dse(ld, attrs, control);
1914 }
1915
1916 /*******************************************************************
1917  Check if LDAP-Server supports a certain Extension (OID in string format)
1918 ********************************************************************/
1919
1920 bool smbldap_has_extension(LDAP *ld, const char *extension)
1921 {
1922         const char *attrs[] = { "supportedExtension", NULL };
1923         return smbldap_check_root_dse(ld, attrs, extension);
1924 }
1925
1926 /*******************************************************************
1927  Check if LDAP-Server holds a given namingContext
1928 ********************************************************************/
1929
1930 bool smbldap_has_naming_context(LDAP *ld, const char *naming_context)
1931 {
1932         const char *attrs[] = { "namingContexts", NULL };
1933         return smbldap_check_root_dse(ld, attrs, naming_context);
1934 }
1935
1936 bool smbldap_set_creds(struct smbldap_state *ldap_state, bool anon, const char *dn, const char *secret)
1937 {
1938         ldap_state->anonymous = anon;
1939
1940         /* free any previously set credential */
1941
1942         SAFE_FREE(ldap_state->bind_dn);
1943         if (ldap_state->bind_secret) {
1944                 /* make sure secrets are zeroed out of memory */
1945                 memset(ldap_state->bind_secret, '\0', strlen(ldap_state->bind_secret));
1946                 SAFE_FREE(ldap_state->bind_secret);
1947         }
1948
1949         if ( ! anon) {
1950                 ldap_state->bind_dn = SMB_STRDUP(dn);
1951                 ldap_state->bind_secret = SMB_STRDUP(secret);
1952         }
1953
1954         return True;
1955 }