CMakeLua/Utilities/cmcurl-7.19.0/lib/ldap.c

   1 /***************************************************************************
   2  *                      _   _ ____  _
   3  *  Project         ___| | | |  _ \| |
   4  *                 / __| | | | |_) | |
   5  *                | (__| |_| |  _ <| |___
   6  *                 \___|\___/|_| \_\_____|
   7  *
   8  * Copyright (C) 1998 - 2008, Daniel Stenberg, <daniel@haxx.se>, et al.
   9  *
  10  * This software is licensed as described in the file COPYING, which
  11  * you should have received as part of this distribution. The terms
  12  * are also available at http://curl.haxx.se/docs/copyright.html.
  13  *
  14  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
  15  * copies of the Software, and permit persons to whom the Software is
  16  * furnished to do so, under the terms of the COPYING file.
  17  *
  18  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  19  * KIND, either express or implied.
  20  *
  21  * $Id: ldap.c,v 1.1.1.1 2008-09-23 16:32:05 hoffman Exp $
  22  ***************************************************************************/
  23
  24 #include "setup.h"
  25
  26 #ifndef CURL_DISABLE_LDAP
  27 /* -- WIN32 approved -- */
  28 #include <stdio.h>
  29 #include <string.h>
  30 #include <stdarg.h>
  31 #include <stdlib.h>
  32 #include <ctype.h>
  33 #ifdef NEED_MALLOC_H
  34 #include <malloc.h>
  35 #endif
  36 #include <errno.h>
  37
  38 #ifdef CURL_LDAP_HYBRID         /* If W$ definitions are needed. */
  39 # include <windows.h>
  40   /* Remember we are NOT in a W$ compiler! */
  41 # undef WIN32
  42 # undef _WIN32
  43 # undef __WIN32__
  44 #endif
  45
  46 #ifdef CURL_LDAP_WIN            /* Use W$ LDAP implementation. */
  47 # include <winldap.h>
  48 # ifndef LDAP_VENDOR_NAME
  49 #  error Your Platform SDK is NOT sufficient for LDAP support! Update your Platform SDK, or disable LDAP LDAP support!
  50 # else
  51 #  include <winber.h>
  52 # endif
  53 #else
  54 #define LDAP_DEPRECATED 1       /* Be sure ldap_init() is defined. */
  55 #ifdef HAVE_LBER_H
  56 # include <lber.h>
  57 #endif
  58 # include <ldap.h>
  59 #if (defined(HAVE_LDAP_SSL) && defined(HAVE_LDAP_SSL_H))
  60 # include <ldap_ssl.h>
  61 #endif /* HAVE_LDAP_SSL && HAVE_LDAP_SSL_H */
  62 #endif
  63
  64 #ifdef HAVE_UNISTD_H
  65 # include <unistd.h>
  66 #endif
  67
  68 #include "urldata.h"
  69 #include <curl/curl.h>
  70 #include "sendf.h"
  71 #include "escape.h"
  72 #include "transfer.h"
  73 #include "strequal.h"
  74 #include "strtok.h"
  75 #include "curl_ldap.h"
  76 #include "memory.h"
  77 #include "curl_base64.h"
  78
  79 #define _MPRINTF_REPLACE /* use our functions only */
  80 #include <curl/mprintf.h>
  81
  82 #include "memdebug.h"
  83
  84 #ifndef HAVE_LDAP_URL_PARSE
  85
  86 /* Use our own implementation. */
  87
  88 typedef struct {
  89     char   *lud_host;
  90     int     lud_port;
  91     char   *lud_dn;
  92     char  **lud_attrs;
  93     int     lud_scope;
  94     char   *lud_filter;
  95     char  **lud_exts;
  96 } CURL_LDAPURLDesc;
  97
  98 #undef LDAPURLDesc
  99 #define LDAPURLDesc             CURL_LDAPURLDesc
 100
 101 static int  _ldap_url_parse (const struct connectdata *conn,
 102                              LDAPURLDesc **ludp);
 103 static void _ldap_free_urldesc (LDAPURLDesc *ludp);
 104
 105 #undef ldap_free_urldesc
 106 #define ldap_free_urldesc       _ldap_free_urldesc
 107 #endif
 108
 109 #ifdef DEBUG_LDAP
 110   #define LDAP_TRACE(x)   do { \
 111                             _ldap_trace ("%u: ", __LINE__); \
 112                             _ldap_trace x; \
 113                           } while(0)
 114
 115   static void _ldap_trace (const char *fmt, ...);
 116 #else
 117   #define LDAP_TRACE(x)   ((void)0)
 118 #endif
 119
 120
 121 static CURLcode Curl_ldap(struct connectdata *conn, bool *done);
 122
 123 /*
 124  * LDAP protocol handler.
 125  */
 126
 127 const struct Curl_handler Curl_handler_ldap = {
 128   "LDAP",                               /* scheme */
 129   ZERO_NULL,                            /* setup_connection */
 130   Curl_ldap,                            /* do_it */
 131   ZERO_NULL,                            /* done */
 132   ZERO_NULL,                            /* do_more */
 133   ZERO_NULL,                            /* connect_it */
 134   ZERO_NULL,                            /* connecting */
 135   ZERO_NULL,                            /* doing */
 136   ZERO_NULL,                            /* proto_getsock */
 137   ZERO_NULL,                            /* doing_getsock */
 138   ZERO_NULL,                            /* disconnect */
 139   PORT_LDAP,                            /* defport */
 140   PROT_LDAP                             /* protocol */
 141 };
 142
 143 #ifdef HAVE_LDAP_SSL
 144 /*
 145  * LDAPS protocol handler.
 146  */
 147
 148 const struct Curl_handler Curl_handler_ldaps = {
 149   "LDAPS",                              /* scheme */
 150   ZERO_NULL,                            /* setup_connection */
 151   Curl_ldap,                            /* do_it */
 152   ZERO_NULL,                            /* done */
 153   ZERO_NULL,                            /* do_more */
 154   ZERO_NULL,                            /* connect_it */
 155   ZERO_NULL,                            /* connecting */
 156   ZERO_NULL,                            /* doing */
 157   ZERO_NULL,                            /* proto_getsock */
 158   ZERO_NULL,                            /* doing_getsock */
 159   ZERO_NULL,                            /* disconnect */
 160   PORT_LDAPS,                           /* defport */
 161   PROT_LDAP | PROT_SSL                  /* protocol */
 162 };
 163 #endif
 164
 165
 166 static CURLcode Curl_ldap(struct connectdata *conn, bool *done)
 167 {
 168   CURLcode status = CURLE_OK;
 169   int rc = 0;
 170   LDAP *server = NULL;
 171   LDAPURLDesc *ludp = NULL;
 172   LDAPMessage *result = NULL;
 173   LDAPMessage *entryIterator;
 174   int num = 0;
 175   struct SessionHandle *data=conn->data;
 176   int ldap_proto = LDAP_VERSION3;
 177   int ldap_ssl = 0;
 178   char *val_b64;
 179   size_t val_b64_sz;
 180 #ifdef LDAP_OPT_NETWORK_TIMEOUT
 181   struct timeval ldap_timeout = {10,0}; /* 10 sec connection/search timeout */
 182 #endif
 183
 184   *done = TRUE; /* unconditionally */
 185   infof(data, "LDAP local: LDAP Vendor = %s ; LDAP Version = %d\n",
 186           LDAP_VENDOR_NAME, LDAP_VENDOR_VERSION);
 187   infof(data, "LDAP local: %s\n", data->change.url);
 188
 189 #ifdef HAVE_LDAP_URL_PARSE
 190   rc = ldap_url_parse(data->change.url, &ludp);
 191 #else
 192   rc = _ldap_url_parse(conn, &ludp);
 193 #endif
 194   if(rc != 0) {
 195     failf(data, "LDAP local: %s", ldap_err2string(rc));
 196     status = CURLE_LDAP_INVALID_URL;
 197     goto quit;
 198   }
 199
 200   /* Get the URL scheme ( either ldap or ldaps ) */
 201   if(strequal(conn->protostr, "LDAPS"))
 202     ldap_ssl = 1;
 203   infof(data, "LDAP local: trying to establish %s connection\n",
 204           ldap_ssl ? "encrypted" : "cleartext");
 205
 206 #ifdef LDAP_OPT_NETWORK_TIMEOUT
 207   ldap_set_option(NULL, LDAP_OPT_NETWORK_TIMEOUT, &ldap_timeout);
 208 #endif
 209   ldap_set_option(NULL, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto);
 210
 211   if(ldap_ssl) {
 212 #ifdef HAVE_LDAP_SSL
 213 #ifdef CURL_LDAP_WIN
 214     /* Win32 LDAP SDK doesnt support insecure mode without CA! */
 215     server = ldap_sslinit(conn->host.name, (int)conn->port, 1);
 216     ldap_set_option(server, LDAP_OPT_SSL, LDAP_OPT_ON);
 217 #else
 218     int ldap_option;
 219     char* ldap_ca = data->set.str[STRING_SSL_CAFILE];
 220 #if defined(CURL_HAS_NOVELL_LDAPSDK)
 221     rc = ldapssl_client_init(NULL, NULL);
 222     if(rc != LDAP_SUCCESS) {
 223       failf(data, "LDAP local: ldapssl_client_init %s", ldap_err2string(rc));
 224       status = CURLE_SSL_CERTPROBLEM;
 225       goto quit;
 226     }
 227     if(data->set.ssl.verifypeer) {
 228       /* Novell SDK supports DER or BASE64 files. */
 229       int cert_type = LDAPSSL_CERT_FILETYPE_B64;
 230       if((data->set.str[STRING_CERT_TYPE]) &&
 231               (strequal(data->set.str[STRING_CERT_TYPE], "DER")))
 232         cert_type = LDAPSSL_CERT_FILETYPE_DER;
 233       if(!ldap_ca) {
 234         failf(data, "LDAP local: ERROR %s CA cert not set!",
 235               (cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM"));
 236         status = CURLE_SSL_CERTPROBLEM;
 237         goto quit;
 238       }
 239       infof(data, "LDAP local: using %s CA cert '%s'\n",
 240               (cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM"),
 241               ldap_ca);
 242       rc = ldapssl_add_trusted_cert(ldap_ca, cert_type);
 243       if(rc != LDAP_SUCCESS) {
 244         failf(data, "LDAP local: ERROR setting %s CA cert: %s",
 245                 (cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM"),
 246                 ldap_err2string(rc));
 247         status = CURLE_SSL_CERTPROBLEM;
 248         goto quit;
 249       }
 250       ldap_option = LDAPSSL_VERIFY_SERVER;
 251     } else {
 252       ldap_option = LDAPSSL_VERIFY_NONE;
 253     }
 254     rc = ldapssl_set_verify_mode(ldap_option);
 255     if(rc != LDAP_SUCCESS) {
 256       failf(data, "LDAP local: ERROR setting cert verify mode: %s",
 257               ldap_err2string(rc));
 258       status = CURLE_SSL_CERTPROBLEM;
 259       goto quit;
 260     }
 261     server = ldapssl_init(conn->host.name, (int)conn->port, 1);
 262     if(server == NULL) {
 263       failf(data, "LDAP local: Cannot connect to %s:%d",
 264               conn->host.name, conn->port);
 265       status = CURLE_COULDNT_CONNECT;
 266       goto quit;
 267     }
 268 #elif defined(LDAP_OPT_X_TLS)
 269     if(data->set.ssl.verifypeer) {
 270       /* OpenLDAP SDK supports BASE64 files. */
 271       if((data->set.str[STRING_CERT_TYPE]) &&
 272               (!strequal(data->set.str[STRING_CERT_TYPE], "PEM"))) {
 273         failf(data, "LDAP local: ERROR OpenLDAP does only support PEM cert-type!");
 274         status = CURLE_SSL_CERTPROBLEM;
 275         goto quit;
 276       }
 277       if(!ldap_ca) {
 278         failf(data, "LDAP local: ERROR PEM CA cert not set!");
 279         status = CURLE_SSL_CERTPROBLEM;
 280         goto quit;
 281       }
 282       infof(data, "LDAP local: using PEM CA cert: %s\n", ldap_ca);
 283       rc = ldap_set_option(NULL, LDAP_OPT_X_TLS_CACERTFILE, ldap_ca);
 284       if(rc != LDAP_SUCCESS) {
 285         failf(data, "LDAP local: ERROR setting PEM CA cert: %s",
 286                 ldap_err2string(rc));
 287         status = CURLE_SSL_CERTPROBLEM;
 288         goto quit;
 289       }
 290       ldap_option = LDAP_OPT_X_TLS_DEMAND;
 291     } else {
 292       ldap_option = LDAP_OPT_X_TLS_NEVER;
 293     }
 294     rc = ldap_set_option(NULL, LDAP_OPT_X_TLS_REQUIRE_CERT, &ldap_option);
 295     if(rc != LDAP_SUCCESS) {
 296       failf(data, "LDAP local: ERROR setting cert verify mode: %s",
 297               ldap_err2string(rc));
 298       status = CURLE_SSL_CERTPROBLEM;
 299       goto quit;
 300     }
 301     server = ldap_init(conn->host.name, (int)conn->port);
 302     if(server == NULL) {
 303       failf(data, "LDAP local: Cannot connect to %s:%d",
 304               conn->host.name, conn->port);
 305       status = CURLE_COULDNT_CONNECT;
 306       goto quit;
 307     }
 308     ldap_option = LDAP_OPT_X_TLS_HARD;
 309     rc = ldap_set_option(server, LDAP_OPT_X_TLS, &ldap_option);
 310     if(rc != LDAP_SUCCESS) {
 311       failf(data, "LDAP local: ERROR setting SSL/TLS mode: %s",
 312               ldap_err2string(rc));
 313       status = CURLE_SSL_CERTPROBLEM;
 314       goto quit;
 315     }
 316 /*
 317     rc = ldap_start_tls_s(server, NULL, NULL);
 318     if(rc != LDAP_SUCCESS) {
 319       failf(data, "LDAP local: ERROR starting SSL/TLS mode: %s",
 320               ldap_err2string(rc));
 321       status = CURLE_SSL_CERTPROBLEM;
 322       goto quit;
 323     }
 324 */
 325 #else
 326     /* we should probably never come up to here since configure
 327        should check in first place if we can support LDAP SSL/TLS */
 328     failf(data, "LDAP local: SSL/TLS not supported with this version "
 329             "of the OpenLDAP toolkit\n");
 330     status = CURLE_SSL_CERTPROBLEM;
 331     goto quit;
 332 #endif
 333 #endif
 334 #endif /* CURL_LDAP_USE_SSL */
 335   } else {
 336     server = ldap_init(conn->host.name, (int)conn->port);
 337     if(server == NULL) {
 338       failf(data, "LDAP local: Cannot connect to %s:%d",
 339               conn->host.name, conn->port);
 340       status = CURLE_COULDNT_CONNECT;
 341       goto quit;
 342     }
 343   }
 344 #ifdef CURL_LDAP_WIN
 345   ldap_set_option(server, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto);
 346 #endif
 347
 348   rc = ldap_simple_bind_s(server,
 349                           conn->bits.user_passwd ? conn->user : NULL,
 350                           conn->bits.user_passwd ? conn->passwd : NULL);
 351   if(!ldap_ssl && rc != 0) {
 352     ldap_proto = LDAP_VERSION2;
 353     ldap_set_option(server, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto);
 354     rc = ldap_simple_bind_s(server,
 355                             conn->bits.user_passwd ? conn->user : NULL,
 356                             conn->bits.user_passwd ? conn->passwd : NULL);
 357   }
 358   if(rc != 0) {
 359      failf(data, "LDAP local: ldap_simple_bind_s %s", ldap_err2string(rc));
 360      status = CURLE_LDAP_CANNOT_BIND;
 361      goto quit;
 362   }
 363
 364   rc = ldap_search_s(server, ludp->lud_dn, ludp->lud_scope,
 365                      ludp->lud_filter, ludp->lud_attrs, 0, &result);
 366
 367   if(rc != 0 && rc != LDAP_SIZELIMIT_EXCEEDED) {
 368     failf(data, "LDAP remote: %s", ldap_err2string(rc));
 369     status = CURLE_LDAP_SEARCH_FAILED;
 370     goto quit;
 371   }
 372
 373   for(num = 0, entryIterator = ldap_first_entry(server, result);
 374       entryIterator;
 375       entryIterator = ldap_next_entry(server, entryIterator), num++)
 376   {
 377     BerElement *ber = NULL;
 378     char  *attribute;       /*! suspicious that this isn't 'const' */
 379     char  *dn = ldap_get_dn(server, entryIterator);
 380     int i;
 381
 382     Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"DN: ", 4);
 383     Curl_client_write(conn, CLIENTWRITE_BODY, (char *)dn, 0);
 384     Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"\n", 1);
 385
 386     for (attribute = ldap_first_attribute(server, entryIterator, &ber);
 387          attribute;
 388          attribute = ldap_next_attribute(server, entryIterator, ber))
 389     {
 390       BerValue **vals = ldap_get_values_len(server, entryIterator, attribute);
 391
 392       if(vals != NULL)
 393       {
 394         for (i = 0; (vals[i] != NULL); i++)
 395         {
 396           Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"\t", 1);
 397           Curl_client_write(conn, CLIENTWRITE_BODY, (char *) attribute, 0);
 398           Curl_client_write(conn, CLIENTWRITE_BODY, (char *)": ", 2);
 399           if((strlen(attribute) > 7) &&
 400               (strcmp(";binary",
 401                       (char *)attribute +
 402                       (strlen((char *)attribute) - 7)) == 0)) {
 403             /* Binary attribute, encode to base64. */
 404             val_b64_sz = Curl_base64_encode(conn->data,
 405                                             vals[i]->bv_val,
 406                                             vals[i]->bv_len,
 407                                             &val_b64);
 408             if(val_b64_sz > 0) {
 409               Curl_client_write(conn, CLIENTWRITE_BODY, val_b64, val_b64_sz);
 410               free(val_b64);
 411             }
 412           } else
 413             Curl_client_write(conn, CLIENTWRITE_BODY, vals[i]->bv_val,
 414                               vals[i]->bv_len);
 415           Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"\n", 0);
 416         }
 417
 418         /* Free memory used to store values */
 419         ldap_value_free_len(vals);
 420       }
 421       Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"\n", 1);
 422
 423       ldap_memfree(attribute);
 424     }
 425     ldap_memfree(dn);
 426     if(ber)
 427        ber_free(ber, 0);
 428   }
 429
 430 quit:
 431   if(result) {
 432     ldap_msgfree(result);
 433     LDAP_TRACE (("Received %d entries\n", num));
 434   }
 435   if(rc == LDAP_SIZELIMIT_EXCEEDED)
 436     infof(data, "There are more than %d entries\n", num);
 437   if(ludp)
 438     ldap_free_urldesc(ludp);
 439   if(server)
 440     ldap_unbind_s(server);
 441 #if defined(HAVE_LDAP_SSL) && defined(CURL_HAS_NOVELL_LDAPSDK)
 442   if(ldap_ssl)
 443     ldapssl_client_deinit();
 444 #endif /* HAVE_LDAP_SSL && CURL_HAS_NOVELL_LDAPSDK */
 445
 446   /* no data to transfer */
 447   Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
 448   conn->bits.close = TRUE;
 449
 450   return status;
 451 }
 452
 453 #ifdef DEBUG_LDAP
 454 static void _ldap_trace (const char *fmt, ...)
 455 {
 456   static int do_trace = -1;
 457   va_list args;
 458
 459   if(do_trace == -1) {
 460     const char *env = getenv("CURL_TRACE");
 461     do_trace = (env && atoi(env) > 0);
 462   }
 463   if(!do_trace)
 464     return;
 465
 466   va_start (args, fmt);
 467   vfprintf (stderr, fmt, args);
 468   va_end (args);
 469 }
 470 #endif
 471
 472 #ifndef HAVE_LDAP_URL_PARSE
 473
 474 /*
 475  * Return scope-value for a scope-string.
 476  */
 477 static int str2scope (const char *p)
 478 {
 479   if(!stricmp(p, "one"))
 480      return LDAP_SCOPE_ONELEVEL;
 481   if(!stricmp(p, "onetree"))
 482      return LDAP_SCOPE_ONELEVEL;
 483   if(!stricmp(p, "base"))
 484      return LDAP_SCOPE_BASE;
 485   if(!stricmp(p, "sub"))
 486      return LDAP_SCOPE_SUBTREE;
 487   if(!stricmp( p, "subtree"))
 488      return LDAP_SCOPE_SUBTREE;
 489   return (-1);
 490 }
 491
 492 /*
 493  * Split 'str' into strings separated by commas.
 494  * Note: res[] points into 'str'.
 495  */
 496 static char **split_str (char *str)
 497 {
 498   char **res, *lasts, *s;
 499   int  i;
 500
 501   for (i = 2, s = strchr(str,','); s; i++)
 502      s = strchr(++s,',');
 503
 504   res = calloc(i, sizeof(char*));
 505   if(!res)
 506     return NULL;
 507
 508   for (i = 0, s = strtok_r(str, ",", &lasts); s;
 509        s = strtok_r(NULL, ",", &lasts), i++)
 510     res[i] = s;
 511   return res;
 512 }
 513
 514 /*
 515  * Unescape the LDAP-URL components
 516  */
 517 static bool unescape_elements (void *data, LDAPURLDesc *ludp)
 518 {
 519   int i;
 520
 521   if(ludp->lud_filter) {
 522     ludp->lud_filter = curl_easy_unescape(data, ludp->lud_filter, 0, NULL);
 523     if(!ludp->lud_filter)
 524        return (FALSE);
 525   }
 526
 527   for (i = 0; ludp->lud_attrs && ludp->lud_attrs[i]; i++) {
 528     ludp->lud_attrs[i] = curl_easy_unescape(data, ludp->lud_attrs[i], 0, NULL);
 529     if(!ludp->lud_attrs[i])
 530        return (FALSE);
 531   }
 532
 533   for (i = 0; ludp->lud_exts && ludp->lud_exts[i]; i++) {
 534     ludp->lud_exts[i] = curl_easy_unescape(data, ludp->lud_exts[i], 0, NULL);
 535     if(!ludp->lud_exts[i])
 536        return (FALSE);
 537   }
 538
 539   if(ludp->lud_dn) {
 540     char *dn = ludp->lud_dn;
 541     char *new_dn = curl_easy_unescape(data, dn, 0, NULL);
 542
 543     free(dn);
 544     ludp->lud_dn = new_dn;
 545     if(!new_dn)
 546        return (FALSE);
 547   }
 548   return (TRUE);
 549 }
 550
 551 /*
 552  * Break apart the pieces of an LDAP URL.
 553  * Syntax:
 554  *   ldap://<hostname>:<port>/<base_dn>?<attributes>?<scope>?<filter>?<ext>
 555  *
 556  * <hostname> already known from 'conn->host.name'.
 557  * <port>     already known from 'conn->remote_port'.
 558  * extract the rest from 'conn->data->state.path+1'. All fields are optional.
 559  * e.g.
 560  *   ldap://<hostname>:<port>/?<attributes>?<scope>?<filter>
 561  * yields ludp->lud_dn = "".
 562  *
 563  * Ref. http://developer.netscape.com/docs/manuals/dirsdk/csdk30/url.htm#2831915
 564  */
 565 static int _ldap_url_parse2 (const struct connectdata *conn, LDAPURLDesc *ludp)
 566 {
 567   char *p, *q;
 568   int i;
 569
 570   if(!conn->data ||
 571       !conn->data->state.path ||
 572       conn->data->state.path[0] != '/' ||
 573       !checkprefix(conn->protostr, conn->data->change.url))
 574     return LDAP_INVALID_SYNTAX;
 575
 576   ludp->lud_scope = LDAP_SCOPE_BASE;
 577   ludp->lud_port  = conn->remote_port;
 578   ludp->lud_host  = conn->host.name;
 579
 580   /* parse DN (Distinguished Name).
 581    */
 582   ludp->lud_dn = strdup(conn->data->state.path+1);
 583   if(!ludp->lud_dn)
 584     return LDAP_NO_MEMORY;
 585
 586   p = strchr(ludp->lud_dn, '?');
 587   LDAP_TRACE (("DN '%.*s'\n", p ? (size_t)(p-ludp->lud_dn) :
 588                strlen(ludp->lud_dn), ludp->lud_dn));
 589
 590   if(!p)
 591     goto success;
 592
 593   *p++ = '\0';
 594
 595   /* parse attributes. skip "??".
 596    */
 597   q = strchr(p, '?');
 598   if(q)
 599     *q++ = '\0';
 600
 601   if(*p && *p != '?') {
 602     ludp->lud_attrs = split_str(p);
 603     if(!ludp->lud_attrs)
 604       return LDAP_NO_MEMORY;
 605
 606     for (i = 0; ludp->lud_attrs[i]; i++)
 607       LDAP_TRACE (("attr[%d] '%s'\n", i, ludp->lud_attrs[i]));
 608   }
 609
 610   p = q;
 611   if(!p)
 612     goto success;
 613
 614   /* parse scope. skip "??"
 615    */
 616   q = strchr(p, '?');
 617   if(q)
 618     *q++ = '\0';
 619
 620   if(*p && *p != '?') {
 621     ludp->lud_scope = str2scope(p);
 622     if(ludp->lud_scope == -1)
 623       return LDAP_INVALID_SYNTAX;
 624     LDAP_TRACE (("scope %d\n", ludp->lud_scope));
 625   }
 626
 627   p = q;
 628   if(!p)
 629     goto success;
 630
 631   /* parse filter
 632    */
 633   q = strchr(p, '?');
 634   if(q)
 635     *q++ = '\0';
 636   if(!*p)
 637     return LDAP_INVALID_SYNTAX;
 638
 639   ludp->lud_filter = p;
 640   LDAP_TRACE (("filter '%s'\n", ludp->lud_filter));
 641
 642   p = q;
 643   if(!p)
 644     goto success;
 645
 646   /* parse extensions
 647    */
 648   ludp->lud_exts = split_str(p);
 649   if(!ludp->lud_exts)
 650     return LDAP_NO_MEMORY;
 651
 652   for (i = 0; ludp->lud_exts[i]; i++)
 653     LDAP_TRACE (("exts[%d] '%s'\n", i, ludp->lud_exts[i]));
 654
 655   success:
 656   if(!unescape_elements(conn->data, ludp))
 657     return LDAP_NO_MEMORY;
 658   return LDAP_SUCCESS;
 659 }
 660
 661 static int _ldap_url_parse (const struct connectdata *conn,
 662                             LDAPURLDesc **ludpp)
 663 {
 664   LDAPURLDesc *ludp = calloc(sizeof(*ludp), 1);
 665   int rc;
 666
 667   *ludpp = NULL;
 668   if(!ludp)
 669      return LDAP_NO_MEMORY;
 670
 671   rc = _ldap_url_parse2 (conn, ludp);
 672   if(rc != LDAP_SUCCESS) {
 673     _ldap_free_urldesc(ludp);
 674     ludp = NULL;
 675   }
 676   *ludpp = ludp;
 677   return (rc);
 678 }
 679
 680 static void _ldap_free_urldesc (LDAPURLDesc *ludp)
 681 {
 682   int i;
 683
 684   if(!ludp)
 685      return;
 686
 687   if(ludp->lud_dn)
 688      free(ludp->lud_dn);
 689
 690   if(ludp->lud_filter)
 691      free(ludp->lud_filter);
 692
 693   if(ludp->lud_attrs) {
 694     for (i = 0; ludp->lud_attrs[i]; i++)
 695        free(ludp->lud_attrs[i]);
 696     free(ludp->lud_attrs);
 697   }
 698
 699   if(ludp->lud_exts) {
 700     for (i = 0; ludp->lud_exts[i]; i++)
 701        free(ludp->lud_exts[i]);
 702     free(ludp->lud_exts);
 703   }
 704   free (ludp);
 705 }
 706 #endif  /* !HAVE_LDAP_URL_PARSE */
 707 #endif  /* CURL_DISABLE_LDAP */