git.sur5r.net Git - openldap/blob - libraries/libldap/open.c

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
   4  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   5  */
   6 /*  Portions
   7  *  Copyright (c) 1995 Regents of the University of Michigan.
   8  *  All rights reserved.
   9  *
  10  *  open.c
  11  */
  12
  13 #include "portable.h"
  14
  15 #include <stdio.h>
  16 #include <limits.h>
  17
  18 #include <ac/stdlib.h>
  19
  20 #include <ac/param.h>
  21 #include <ac/socket.h>
  22 #include <ac/string.h>
  23 #include <ac/time.h>
  24
  25 #include <ac/unistd.h>
  26
  27 #include "ldap-int.h"
  28 #include "ldap_log.h"
  29
  30 int ldap_open_defconn( LDAP *ld )
  31 {
  32         ld->ld_defconn = ldap_new_connection( ld,
  33                 ld->ld_options.ldo_defludp, 1, 1, NULL );
  34
  35         if( ld->ld_defconn == NULL ) {
  36                 ld->ld_errno = LDAP_SERVER_DOWN;
  37                 return -1;
  38         }
  39
  40         ++ld->ld_defconn->lconn_refcnt; /* so it never gets closed/freed */
  41         return 0;
  42 }
  43
  44 /*
  45  * ldap_open - initialize and connect to an ldap server.  A magic cookie to
  46  * be used for future communication is returned on success, NULL on failure.
  47  * "host" may be a space-separated list of hosts or IP addresses
  48  *
  49  * Example:
  50  *      LDAP    *ld;
  51  *      ld = ldap_open( hostname, port );
  52  */
  53
  54 LDAP *
  55 ldap_open( LDAP_CONST char *host, int port )
  56 {
  57         int rc;
  58         LDAP            *ld;
  59
  60 #ifdef NEW_LOGGING
  61         LDAP_LOG ( CONNECTION, ARGS, "ldap_open(%s, %d)\n", host, port, 0 );
  62 #else
  63         Debug( LDAP_DEBUG_TRACE, "ldap_open(%s, %d)\n",
  64                 host, port, 0 );
  65 #endif
  66
  67         ld = ldap_init( host, port );
  68         if ( ld == NULL ) {
  69                 return( NULL );
  70         }
  71
  72         rc = ldap_open_defconn( ld );
  73
  74         if( rc < 0 ) {
  75                 ldap_ld_free( ld, 0, NULL, NULL );
  76                 ld = NULL;
  77         }
  78
  79 #ifdef NEW_LOGGING
  80         LDAP_LOG ( CONNECTION, RESULTS, "ldap_open: %s\n",
  81                 ld == NULL ? "succeeded" : "failed", 0, 0 );
  82 #else
  83         Debug( LDAP_DEBUG_TRACE, "ldap_open: %s\n",
  84                 ld == NULL ? "succeeded" : "failed", 0, 0 );
  85 #endif
  86
  87         return ld;
  88 }
  89
  90
  91
  92 int
  93 ldap_create( LDAP **ldp )
  94 {
  95         LDAP                    *ld;
  96         struct ldapoptions      *gopts;
  97
  98         *ldp = NULL;
  99         /* Get pointer to global option structure */
 100         if ( (gopts = LDAP_INT_GLOBAL_OPT()) == NULL) {
 101                 return LDAP_NO_MEMORY;
 102         }
 103
 104         /* Initialize the global options, if not already done. */
 105         if( gopts->ldo_valid != LDAP_INITIALIZED ) {
 106                 ldap_int_initialize(gopts, NULL);
 107                 if ( gopts->ldo_valid != LDAP_INITIALIZED )
 108                         return LDAP_LOCAL_ERROR;
 109         }
 110
 111 #ifdef NEW_LOGGING
 112         LDAP_LOG ( CONNECTION, ENTRY, "ldap_create\n", 0, 0, 0 );
 113 #else
 114         Debug( LDAP_DEBUG_TRACE, "ldap_create\n", 0, 0, 0 );
 115 #endif
 116
 117         if ( (ld = (LDAP *) LDAP_CALLOC( 1, sizeof(LDAP) )) == NULL ) {
 118                 return( LDAP_NO_MEMORY );
 119         }
 120
 121         /* copy the global options */
 122         AC_MEMCPY(&ld->ld_options, gopts, sizeof(ld->ld_options));
 123
 124         ld->ld_valid = LDAP_VALID_SESSION;
 125
 126         /* but not pointers to malloc'ed items */
 127         ld->ld_options.ldo_sctrls = NULL;
 128         ld->ld_options.ldo_cctrls = NULL;
 129
 130 #ifdef HAVE_CYRUS_SASL
 131         ld->ld_options.ldo_def_sasl_mech = gopts->ldo_def_sasl_mech
 132                 ? LDAP_STRDUP( gopts->ldo_def_sasl_mech ) : NULL;
 133         ld->ld_options.ldo_def_sasl_realm = gopts->ldo_def_sasl_realm
 134                 ? LDAP_STRDUP( gopts->ldo_def_sasl_realm ) : NULL;
 135         ld->ld_options.ldo_def_sasl_authcid = gopts->ldo_def_sasl_authcid
 136                 ? LDAP_STRDUP( gopts->ldo_def_sasl_authcid ) : NULL;
 137         ld->ld_options.ldo_def_sasl_authzid = gopts->ldo_def_sasl_authzid
 138                 ? LDAP_STRDUP( gopts->ldo_def_sasl_authzid ) : NULL;
 139 #endif
 140
 141         ld->ld_options.ldo_defludp = ldap_url_duplist(gopts->ldo_defludp);
 142
 143         if ( ld->ld_options.ldo_defludp == NULL ) {
 144                 LDAP_FREE( (char*)ld );
 145                 return LDAP_NO_MEMORY;
 146         }
 147
 148         if (( ld->ld_selectinfo = ldap_new_select_info()) == NULL ) {
 149                 ldap_free_urllist( ld->ld_options.ldo_defludp );
 150                 LDAP_FREE( (char*) ld );
 151                 return LDAP_NO_MEMORY;
 152         }
 153
 154         ld->ld_lberoptions = LBER_USE_DER;
 155
 156         ld->ld_sb = ber_sockbuf_alloc( );
 157         if ( ld->ld_sb == NULL ) {
 158                 ldap_free_urllist( ld->ld_options.ldo_defludp );
 159                 LDAP_FREE( (char*) ld );
 160                 return LDAP_NO_MEMORY;
 161         }
 162
 163         *ldp = ld;
 164         return LDAP_SUCCESS;
 165 }
 166
 167 /*
 168  * ldap_init - initialize the LDAP library.  A magic cookie to be used for
 169  * future communication is returned on success, NULL on failure.
 170  * "host" may be a space-separated list of hosts or IP addresses
 171  *
 172  * Example:
 173  *      LDAP    *ld;
 174  *      ld = ldap_init( host, port );
 175  */
 176 LDAP *
 177 ldap_init( LDAP_CONST char *defhost, int defport )
 178 {
 179         LDAP *ld;
 180         int rc;
 181
 182         rc = ldap_create(&ld);
 183         if ( rc != LDAP_SUCCESS )
 184                 return NULL;
 185
 186         if (defport != 0)
 187                 ld->ld_options.ldo_defport = defport;
 188
 189         if (defhost != NULL) {
 190                 rc = ldap_set_option(ld, LDAP_OPT_HOST_NAME, defhost);
 191                 if ( rc != LDAP_SUCCESS ) {
 192                         ldap_ld_free(ld, 1, NULL, NULL);
 193                         return NULL;
 194                 }
 195         }
 196
 197         return( ld );
 198 }
 199
 200
 201 int
 202 ldap_initialize( LDAP **ldp, LDAP_CONST char *url )
 203 {
 204         int rc;
 205         LDAP *ld;
 206
 207         *ldp = NULL;
 208         rc = ldap_create(&ld);
 209         if ( rc != LDAP_SUCCESS )
 210                 return rc;
 211
 212         if (url != NULL) {
 213                 rc = ldap_set_option(ld, LDAP_OPT_URI, url);
 214                 if ( rc != LDAP_SUCCESS ) {
 215                         ldap_ld_free(ld, 1, NULL, NULL);
 216                         return rc;
 217                 }
 218 #ifdef LDAP_CONNECTIONLESS
 219                 if (ldap_is_ldapc_url(url))
 220                         LDAP_IS_UDP(ld) = 1;
 221 #endif
 222         }
 223
 224         *ldp = ld;
 225         return LDAP_SUCCESS;
 226 }
 227
 228 int
 229 ldap_int_open_connection(
 230         LDAP *ld,
 231         LDAPConn *conn,
 232         LDAPURLDesc *srv,
 233         int async )
 234 {
 235         int rc = -1;
 236 #ifdef HAVE_CYRUS_SASL
 237         char *sasl_host = NULL;
 238         int sasl_ssf = 0;
 239 #endif
 240         char *host;
 241         int port, proto;
 242         long addr;
 243
 244 #ifdef NEW_LOGGING
 245         LDAP_LOG ( CONNECTION, ENTRY, "ldap_int_open_connection\n", 0, 0, 0 );
 246 #else
 247         Debug( LDAP_DEBUG_TRACE, "ldap_int_open_connection\n", 0, 0, 0 );
 248 #endif
 249
 250         switch ( proto = ldap_pvt_url_scheme2proto( srv->lud_scheme ) ) {
 251                 case LDAP_PROTO_TCP:
 252                         port = srv->lud_port;
 253
 254                         addr = 0;
 255                         if ( srv->lud_host == NULL || *srv->lud_host == 0 ) {
 256                                 host = NULL;
 257                                 addr = htonl( INADDR_LOOPBACK );
 258                         } else {
 259                                 host = srv->lud_host;
 260                         }
 261
 262                         if( !port ) {
 263                                 if( strcmp(srv->lud_scheme, "ldaps") == 0 ) {
 264                                         port = LDAPS_PORT;
 265                                 } else {
 266                                         port = LDAP_PORT;
 267                                 }
 268                         }
 269
 270                         rc = ldap_connect_to_host( ld, conn->lconn_sb,
 271                                 proto, host, addr, port, async );
 272
 273                         if ( rc == -1 ) return rc;
 274
 275 #ifdef LDAP_DEBUG
 276                         ber_sockbuf_add_io( conn->lconn_sb, &ber_sockbuf_io_debug,
 277                                 LBER_SBIOD_LEVEL_PROVIDER, (void *)"tcp_" );
 278 #endif
 279                         ber_sockbuf_add_io( conn->lconn_sb, &ber_sockbuf_io_tcp,
 280                                 LBER_SBIOD_LEVEL_PROVIDER, NULL );
 281
 282 #ifdef HAVE_CYRUS_SASL
 283                         sasl_host = ldap_host_connected_to( conn->lconn_sb );
 284 #endif
 285                         break;
 286 #ifdef LDAP_CONNECTIONLESS
 287
 288                 case LDAP_PROTO_UDP:
 289                         port = srv->lud_port;
 290
 291                         addr = 0;
 292                         if ( srv->lud_host == NULL || *srv->lud_host == 0 ) {
 293                                 host = NULL;
 294                                 addr = htonl( INADDR_LOOPBACK );
 295                         } else {
 296                                 host = srv->lud_host;
 297                         }
 298
 299                         if( !port ) port = LDAP_PORT;
 300
 301                         LDAP_IS_UDP(ld) = 1;
 302                         rc = ldap_connect_to_host( ld, conn->lconn_sb,
 303                                 proto, host, addr, port, async );
 304
 305                         if ( rc == -1 ) return rc;
 306 #ifdef LDAP_DEBUG
 307                         ber_sockbuf_add_io( conn->lconn_sb, &ber_sockbuf_io_debug,
 308                                 LBER_SBIOD_LEVEL_PROVIDER, (void *)"udp_" );
 309 #endif
 310                         ber_sockbuf_add_io( conn->lconn_sb, &ber_sockbuf_io_udp,
 311                                 LBER_SBIOD_LEVEL_PROVIDER, NULL );
 312                         break;
 313 #endif
 314                 case LDAP_PROTO_IPC:
 315 #ifdef LDAP_PF_LOCAL
 316                         /* only IPC mechanism supported is PF_LOCAL (PF_UNIX) */
 317                         rc = ldap_connect_to_path( ld, conn->lconn_sb,
 318                                 srv->lud_host, async );
 319                         if ( rc == -1 ) return rc;
 320 #ifdef LDAP_DEBUG
 321                         ber_sockbuf_add_io( conn->lconn_sb, &ber_sockbuf_io_debug,
 322                                 LBER_SBIOD_LEVEL_PROVIDER, (void *)"ipc_" );
 323 #endif
 324                         ber_sockbuf_add_io( conn->lconn_sb, &ber_sockbuf_io_fd,
 325                                 LBER_SBIOD_LEVEL_PROVIDER, NULL );
 326
 327 #ifdef HAVE_CYRUS_SASL
 328                         sasl_host = ldap_host_connected_to( conn->lconn_sb );
 329                         sasl_ssf = LDAP_PVT_SASL_LOCAL_SSF;
 330 #endif
 331                         break;
 332 #endif /* LDAP_PF_LOCAL */
 333                 default:
 334                         return -1;
 335                         break;
 336         }
 337
 338         ber_sockbuf_add_io( conn->lconn_sb, &ber_sockbuf_io_readahead,
 339                 LBER_SBIOD_LEVEL_PROVIDER, NULL );
 340
 341 #ifdef LDAP_DEBUG
 342         ber_sockbuf_add_io( conn->lconn_sb, &ber_sockbuf_io_debug,
 343                 INT_MAX, (void *)"ldap_" );
 344 #endif
 345
 346 #ifdef LDAP_CONNECTIONLESS
 347         if( proto == LDAP_PROTO_UDP )
 348                 return 0;
 349 #endif
 350
 351 #ifdef HAVE_CYRUS_SASL
 352         /* establish Cyrus SASL context prior to starting TLS so
 353                 that SASL EXTERNAL might be used */
 354         if( sasl_host != NULL ) {
 355                 ldap_int_sasl_open( ld, conn, sasl_host, sasl_ssf );
 356                 LDAP_FREE( sasl_host );
 357         }
 358         /* sasl_ssf is set redundantly. Should probably remove it from
 359          * the ldap_int_sasl_open call since the TLS ssf isn't known
 360          * yet anyway.
 361          */
 362         if( proto == LDAP_PROTO_IPC ) {
 363                 char authid[sizeof("uidNumber=XXXXXX,gidNumber=XXXXXX,"
 364                         "cn=peercred,cn=external,cn=auth")];
 365                 sprintf( authid, "uidNumber=%d,gidNumber=%d,"
 366                         "cn=peercred,cn=external,cn=auth",
 367                         geteuid(), getegid() );
 368                 ldap_int_sasl_external( ld, conn, authid, sasl_ssf );
 369         }
 370 #endif
 371
 372 #ifdef HAVE_TLS
 373         if (ld->ld_options.ldo_tls_mode == LDAP_OPT_X_TLS_HARD ||
 374                 strcmp( srv->lud_scheme, "ldaps" ) == 0 )
 375         {
 376                 ++conn->lconn_refcnt;   /* avoid premature free */
 377
 378                 rc = ldap_int_tls_start( ld, conn, srv );
 379
 380                 --conn->lconn_refcnt;
 381
 382                 if (rc != LDAP_SUCCESS) {
 383                         return -1;
 384                 }
 385         }
 386 #endif
 387
 388 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 389         if ( conn->lconn_krbinstance == NULL ) {
 390                 char *c;
 391                 conn->lconn_krbinstance = ldap_host_connected_to( conn->lconn_sb );
 392
 393                 if( conn->lconn_krbinstance != NULL &&
 394                     ( c = strchr( conn->lconn_krbinstance, '.' )) != NULL ) {
 395                         *c = '\0';
 396                 }
 397         }
 398 #endif /* LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND */
 399
 400         return( 0 );
 401 }
 402
 403
 404 int ldap_open_internal_connection( LDAP **ldp, ber_socket_t *fdp )
 405 {
 406         int rc;
 407         LDAPConn *c;
 408         LDAPRequest *lr;
 409
 410         rc = ldap_create( ldp );
 411         if( rc != LDAP_SUCCESS ) {
 412                 *ldp = NULL;
 413                 return( rc );
 414         }
 415
 416         /* Make it appear that a search request, msgid 0, was sent */
 417         lr = (LDAPRequest *)LDAP_CALLOC( 1, sizeof( LDAPRequest ));
 418         if( lr == NULL ) {
 419                 ldap_unbind( *ldp );
 420                 *ldp = NULL;
 421                 return( LDAP_NO_MEMORY );
 422         }
 423         memset(lr, 0, sizeof( LDAPRequest ));
 424         lr->lr_msgid = 0;
 425         lr->lr_status = LDAP_REQST_INPROGRESS;
 426         lr->lr_res_errno = LDAP_SUCCESS;
 427         (*ldp)->ld_requests = lr;
 428
 429         /* Attach the passed socket as the *LDAP's connection */
 430         c = ldap_new_connection( *ldp, NULL, 1, 0, NULL);
 431         if( c == NULL ) {
 432                 ldap_unbind( *ldp );
 433                 *ldp = NULL;
 434                 return( LDAP_NO_MEMORY );
 435         }
 436         ber_sockbuf_ctrl( c->lconn_sb, LBER_SB_OPT_SET_FD, fdp );
 437 #ifdef LDAP_DEBUG
 438         ber_sockbuf_add_io( c->lconn_sb, &ber_sockbuf_io_debug,
 439                 LBER_SBIOD_LEVEL_PROVIDER, (void *)"int_" );
 440 #endif
 441         ber_sockbuf_add_io( c->lconn_sb, &ber_sockbuf_io_tcp,
 442           LBER_SBIOD_LEVEL_PROVIDER, NULL );
 443         (*ldp)->ld_defconn = c;
 444
 445         /* Add the connection to the *LDAP's select pool */
 446         ldap_mark_select_read( *ldp, c->lconn_sb );
 447         ldap_mark_select_write( *ldp, c->lconn_sb );
 448
 449         /* Make this connection an LDAP V3 protocol connection */
 450         rc = LDAP_VERSION3;
 451         ldap_set_option( *ldp, LDAP_OPT_PROTOCOL_VERSION, &rc );
 452
 453         return( LDAP_SUCCESS );
 454 }