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

   1 /* os-ip.c -- platform-specific TCP & UDP related code */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2012 The OpenLDAP Foundation.
   6  * Portions Copyright 1999 Lars Uffmann.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  18  * All rights reserved.
  19  */
  20 /* Significant additional contributors include:
  21  *    Lars Uffman
  22  */
  23
  24 #include "portable.h"
  25
  26 #include <stdio.h>
  27
  28 #include <ac/stdlib.h>
  29
  30 #include <ac/errno.h>
  31 #include <ac/socket.h>
  32 #include <ac/string.h>
  33 #include <ac/time.h>
  34 #include <ac/unistd.h>
  35
  36 #ifdef HAVE_IO_H
  37 #include <io.h>
  38 #endif /* HAVE_IO_H */
  39 #ifdef HAVE_FCNTL_H
  40 #include <fcntl.h>
  41 #endif
  42
  43 #include "ldap-int.h"
  44
  45 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
  46 #  ifdef LDAP_PF_INET6
  47 int ldap_int_inet4or6 = AF_UNSPEC;
  48 #  else
  49 int ldap_int_inet4or6 = AF_INET;
  50 #  endif
  51 #endif
  52
  53 #ifdef LDAP_DEBUG
  54
  55 #define osip_debug(ld,fmt,arg1,arg2,arg3) \
  56 do { \
  57         ldap_log_printf(NULL, LDAP_DEBUG_TRACE, fmt, arg1, arg2, arg3); \
  58 } while(0)
  59
  60 #else
  61
  62 #define osip_debug(ld,fmt,arg1,arg2,arg3) ((void)0)
  63
  64 #endif /* LDAP_DEBUG */
  65
  66 static void
  67 ldap_pvt_set_errno(int err)
  68 {
  69         sock_errset(err);
  70 }
  71
  72 int
  73 ldap_int_timeval_dup( struct timeval **dest, const struct timeval *src )
  74 {
  75         struct timeval *new;
  76
  77         assert( dest != NULL );
  78
  79         if (src == NULL) {
  80                 *dest = NULL;
  81                 return 0;
  82         }
  83
  84         new = (struct timeval *) LDAP_MALLOC(sizeof(struct timeval));
  85
  86         if( new == NULL ) {
  87                 *dest = NULL;
  88                 return 1;
  89         }
  90
  91         AC_MEMCPY( (char *) new, (const char *) src, sizeof(struct timeval));
  92
  93         *dest = new;
  94         return 0;
  95 }
  96
  97 static int
  98 ldap_pvt_ndelay_on(LDAP *ld, int fd)
  99 {
 100         osip_debug(ld, "ldap_ndelay_on: %d\n",fd,0,0);
 101         return ber_pvt_socket_set_nonblock( fd, 1 );
 102 }
 103
 104 static int
 105 ldap_pvt_ndelay_off(LDAP *ld, int fd)
 106 {
 107         osip_debug(ld, "ldap_ndelay_off: %d\n",fd,0,0);
 108         return ber_pvt_socket_set_nonblock( fd, 0 );
 109 }
 110
 111 static ber_socket_t
 112 ldap_int_socket(LDAP *ld, int family, int type )
 113 {
 114         ber_socket_t s = socket(family, type, 0);
 115         osip_debug(ld, "ldap_new_socket: %d\n",s,0,0);
 116 #ifdef FD_CLOEXEC
 117         fcntl(s, F_SETFD, FD_CLOEXEC);
 118 #endif
 119         return ( s );
 120 }
 121
 122 static int
 123 ldap_pvt_close_socket(LDAP *ld, int s)
 124 {
 125         osip_debug(ld, "ldap_close_socket: %d\n",s,0,0);
 126         return tcp_close(s);
 127 }
 128
 129 static int
 130 ldap_int_prepare_socket(LDAP *ld, int s, int proto )
 131 {
 132         osip_debug( ld, "ldap_prepare_socket: %d\n", s, 0, 0 );
 133
 134 #if defined( SO_KEEPALIVE ) || defined( TCP_NODELAY )
 135         if ( proto == LDAP_PROTO_TCP ) {
 136                 int dummy = 1;
 137 #ifdef SO_KEEPALIVE
 138                 if ( setsockopt( s, SOL_SOCKET, SO_KEEPALIVE,
 139                         (char*) &dummy, sizeof(dummy) ) == AC_SOCKET_ERROR )
 140                 {
 141                         osip_debug( ld, "ldap_prepare_socket: "
 142                                 "setsockopt(%d, SO_KEEPALIVE) failed (ignored).\n",
 143                                 s, 0, 0 );
 144                 }
 145                 if ( ld->ld_options.ldo_keepalive_idle > 0 )
 146                 {
 147 #ifdef TCP_KEEPIDLE
 148                         if ( setsockopt( s, IPPROTO_TCP, TCP_KEEPIDLE,
 149                                         (void*) &ld->ld_options.ldo_keepalive_idle,
 150                                         sizeof(ld->ld_options.ldo_keepalive_idle) ) == AC_SOCKET_ERROR )
 151                         {
 152                                 osip_debug( ld, "ldap_prepare_socket: "
 153                                         "setsockopt(%d, TCP_KEEPIDLE) failed (ignored).\n",
 154                                         s, 0, 0 );
 155                         }
 156 #else
 157                         osip_debug( ld, "ldap_prepare_socket: "
 158                                         "sockopt TCP_KEEPIDLE not supported on this system.\n",
 159                                         0, 0, 0 );
 160 #endif /* TCP_KEEPIDLE */
 161                 }
 162                 if ( ld->ld_options.ldo_keepalive_probes > 0 )
 163                 {
 164 #ifdef TCP_KEEPCNT
 165                         if ( setsockopt( s, IPPROTO_TCP, TCP_KEEPCNT,
 166                                         (void*) &ld->ld_options.ldo_keepalive_probes,
 167                                         sizeof(ld->ld_options.ldo_keepalive_probes) ) == AC_SOCKET_ERROR )
 168                         {
 169                                 osip_debug( ld, "ldap_prepare_socket: "
 170                                         "setsockopt(%d, TCP_KEEPCNT) failed (ignored).\n",
 171                                         s, 0, 0 );
 172                         }
 173 #else
 174                         osip_debug( ld, "ldap_prepare_socket: "
 175                                         "sockopt TCP_KEEPCNT not supported on this system.\n",
 176                                         0, 0, 0 );
 177 #endif /* TCP_KEEPCNT */
 178                 }
 179                 if ( ld->ld_options.ldo_keepalive_interval > 0 )
 180                 {
 181 #ifdef TCP_KEEPINTVL
 182                         if ( setsockopt( s, IPPROTO_TCP, TCP_KEEPINTVL,
 183                                         (void*) &ld->ld_options.ldo_keepalive_interval,
 184                                         sizeof(ld->ld_options.ldo_keepalive_interval) ) == AC_SOCKET_ERROR )
 185                         {
 186                                 osip_debug( ld, "ldap_prepare_socket: "
 187                                         "setsockopt(%d, TCP_KEEPINTVL) failed (ignored).\n",
 188                                         s, 0, 0 );
 189                         }
 190 #else
 191                         osip_debug( ld, "ldap_prepare_socket: "
 192                                         "sockopt TCP_KEEPINTVL not supported on this system.\n",
 193                                         0, 0, 0 );
 194 #endif /* TCP_KEEPINTVL */
 195                 }
 196 #endif /* SO_KEEPALIVE */
 197 #ifdef TCP_NODELAY
 198                 if ( setsockopt( s, IPPROTO_TCP, TCP_NODELAY,
 199                         (char*) &dummy, sizeof(dummy) ) == AC_SOCKET_ERROR )
 200                 {
 201                         osip_debug( ld, "ldap_prepare_socket: "
 202                                 "setsockopt(%d, TCP_NODELAY) failed (ignored).\n",
 203                                 s, 0, 0 );
 204                 }
 205 #endif /* TCP_NODELAY */
 206         }
 207 #endif /* SO_KEEPALIVE || TCP_NODELAY */
 208
 209         return 0;
 210 }
 211
 212 #ifndef HAVE_WINSOCK
 213
 214 #undef TRACE
 215 #define TRACE do { \
 216         osip_debug(ld, \
 217                 "ldap_is_socket_ready: error on socket %d: errno: %d (%s)\n", \
 218                 s, \
 219                 errno, \
 220                 sock_errstr(errno) ); \
 221 } while( 0 )
 222
 223 /*
 224  * check the socket for errors after select returned.
 225  */
 226 static int
 227 ldap_pvt_is_socket_ready(LDAP *ld, int s)
 228 {
 229         osip_debug(ld, "ldap_is_sock_ready: %d\n",s,0,0);
 230
 231 #if defined( notyet ) /* && defined( SO_ERROR ) */
 232 {
 233         int so_errno;
 234         ber_socklen_t dummy = sizeof(so_errno);
 235         if ( getsockopt( s, SOL_SOCKET, SO_ERROR, &so_errno, &dummy )
 236                 == AC_SOCKET_ERROR )
 237         {
 238                 return -1;
 239         }
 240         if ( so_errno ) {
 241                 ldap_pvt_set_errno(so_errno);
 242                 TRACE;
 243                 return -1;
 244         }
 245         return 0;
 246 }
 247 #else
 248 {
 249         /* error slippery */
 250 #ifdef LDAP_PF_INET6
 251         struct sockaddr_storage sin;
 252 #else
 253         struct sockaddr_in sin;
 254 #endif
 255         char ch;
 256         ber_socklen_t dummy = sizeof(sin);
 257         if ( getpeername( s, (struct sockaddr *) &sin, &dummy )
 258                 == AC_SOCKET_ERROR )
 259         {
 260                 /* XXX: needs to be replace with ber_stream_read() */
 261                 (void)read(s, &ch, 1);
 262                 TRACE;
 263                 return -1;
 264         }
 265         return 0;
 266 }
 267 #endif
 268         return -1;
 269 }
 270 #undef TRACE
 271
 272 #endif /* HAVE_WINSOCK */
 273
 274 /* NOTE: this is identical to analogous code in os-local.c */
 275 int
 276 ldap_int_poll(
 277         LDAP *ld,
 278         ber_socket_t s,
 279         struct timeval *tvp,
 280         int wr )
 281 {
 282         int             rc;
 283
 284
 285         osip_debug(ld, "ldap_int_poll: fd: %d tm: %ld\n",
 286                 s, tvp ? tvp->tv_sec : -1L, 0);
 287
 288 #ifdef HAVE_POLL
 289         {
 290                 struct pollfd fd;
 291                 int timeout = INFTIM;
 292                 short event = wr ? POLL_WRITE : POLL_READ;
 293
 294                 fd.fd = s;
 295                 fd.events = event;
 296
 297                 if ( tvp != NULL ) {
 298                         timeout = TV2MILLISEC( tvp );
 299                 }
 300                 do {
 301                         fd.revents = 0;
 302                         rc = poll( &fd, 1, timeout );
 303
 304                 } while ( rc == AC_SOCKET_ERROR && errno == EINTR &&
 305                         LDAP_BOOL_GET( &ld->ld_options, LDAP_BOOL_RESTART ) );
 306
 307                 if ( rc == AC_SOCKET_ERROR ) {
 308                         return rc;
 309                 }
 310
 311                 if ( timeout == 0 && rc == 0 ) {
 312                         return -2;
 313                 }
 314
 315                 if ( fd.revents & event ) {
 316                         if ( ldap_pvt_is_socket_ready( ld, s ) == -1 ) {
 317                                 return -1;
 318                         }
 319
 320                         if ( ldap_pvt_ndelay_off( ld, s ) == -1 ) {
 321                                 return -1;
 322                         }
 323                         return 0;
 324                 }
 325         }
 326 #else
 327         {
 328                 fd_set          wfds, *z = NULL;
 329 #ifdef HAVE_WINSOCK
 330                 fd_set          efds;
 331 #endif
 332                 struct timeval  tv = { 0 };
 333
 334 #if defined( FD_SETSIZE ) && !defined( HAVE_WINSOCK )
 335                 if ( s >= FD_SETSIZE ) {
 336                         rc = AC_SOCKET_ERROR;
 337                         tcp_close( s );
 338                         ldap_pvt_set_errno( EMFILE );
 339                         return rc;
 340                 }
 341 #endif
 342
 343                 if ( tvp != NULL ) {
 344                         tv = *tvp;
 345                 }
 346
 347                 do {
 348                         FD_ZERO(&wfds);
 349                         FD_SET(s, &wfds );
 350
 351 #ifdef HAVE_WINSOCK
 352                         FD_ZERO(&efds);
 353                         FD_SET(s, &efds );
 354 #endif
 355
 356                         rc = select( ldap_int_tblsize, z, &wfds,
 357 #ifdef HAVE_WINSOCK
 358                                 &efds,
 359 #else
 360                                 z,
 361 #endif
 362                                 tvp ? &tv : NULL );
 363                 } while ( rc == AC_SOCKET_ERROR && errno == EINTR &&
 364                         LDAP_BOOL_GET( &ld->ld_options, LDAP_BOOL_RESTART ) );
 365
 366                 if ( rc == AC_SOCKET_ERROR ) {
 367                         return rc;
 368                 }
 369
 370                 if ( rc == 0 && tvp && tvp->tv_sec == 0 && tvp->tv_usec == 0 ) {
 371                         return -2;
 372                 }
 373
 374 #ifdef HAVE_WINSOCK
 375                 /* This means the connection failed */
 376                 if ( FD_ISSET(s, &efds) ) {
 377                         int so_errno;
 378                         ber_socklen_t dummy = sizeof(so_errno);
 379                         if ( getsockopt( s, SOL_SOCKET, SO_ERROR,
 380                                 (char *) &so_errno, &dummy ) == AC_SOCKET_ERROR || !so_errno )
 381                         {
 382                                 /* impossible */
 383                                 so_errno = WSAGetLastError();
 384                         }
 385                         ldap_pvt_set_errno( so_errno );
 386                         osip_debug(ld, "ldap_int_poll: error on socket %d: "
 387                                "errno: %d (%s)\n", s, errno, sock_errstr( errno ));
 388                         return -1;
 389                 }
 390 #endif
 391                 if ( FD_ISSET(s, &wfds) ) {
 392 #ifndef HAVE_WINSOCK
 393                         if ( ldap_pvt_is_socket_ready( ld, s ) == -1 ) {
 394                                 return -1;
 395                         }
 396 #endif
 397                         if ( ldap_pvt_ndelay_off(ld, s) == -1 ) {
 398                                 return -1;
 399                         }
 400                         return 0;
 401                 }
 402         }
 403 #endif
 404
 405         osip_debug(ld, "ldap_int_poll: timed out\n",0,0,0);
 406         ldap_pvt_set_errno( ETIMEDOUT );
 407         return -1;
 408 }
 409
 410 static int
 411 ldap_pvt_connect(LDAP *ld, ber_socket_t s,
 412         struct sockaddr *sin, ber_socklen_t addrlen,
 413         int async)
 414 {
 415         int rc, err;
 416         struct timeval  tv, *opt_tv = NULL;
 417
 418 #ifdef LDAP_CONNECTIONLESS
 419         /* We could do a connect() but that would interfere with
 420          * attempts to poll a broadcast address
 421          */
 422         if (LDAP_IS_UDP(ld)) {
 423                 if (ld->ld_options.ldo_peer)
 424                         ldap_memfree(ld->ld_options.ldo_peer);
 425                 ld->ld_options.ldo_peer=ldap_memalloc(sizeof(struct sockaddr));
 426                 AC_MEMCPY(ld->ld_options.ldo_peer,sin,sizeof(struct sockaddr));
 427                 return ( 0 );
 428         }
 429 #endif
 430         if ( ld->ld_options.ldo_tm_net.tv_sec >= 0 ) {
 431                 tv = ld->ld_options.ldo_tm_net;
 432                 opt_tv = &tv;
 433         }
 434
 435         osip_debug(ld, "ldap_pvt_connect: fd: %d tm: %ld async: %d\n",
 436                         s, opt_tv ? tv.tv_sec : -1L, async);
 437
 438         if ( opt_tv && ldap_pvt_ndelay_on(ld, s) == -1 )
 439                 return ( -1 );
 440
 441         if ( connect(s, sin, addrlen) != AC_SOCKET_ERROR ) {
 442                 if ( opt_tv && ldap_pvt_ndelay_off(ld, s) == -1 )
 443                         return ( -1 );
 444                 return ( 0 );
 445         }
 446
 447         err = sock_errno();
 448         if ( err != EINPROGRESS && err != EWOULDBLOCK ) {
 449                 return ( -1 );
 450         }
 451
 452         if ( async ) {
 453                 /* caller will call ldap_int_poll() as appropriate? */
 454                 return ( -2 );
 455         }
 456
 457         rc = ldap_int_poll( ld, s, opt_tv, 1 );
 458
 459         osip_debug(ld, "ldap_pvt_connect: %d\n", rc, 0, 0);
 460
 461         return rc;
 462 }
 463
 464 #ifndef HAVE_INET_ATON
 465 int
 466 ldap_pvt_inet_aton( const char *host, struct in_addr *in)
 467 {
 468         unsigned long u = inet_addr( host );
 469
 470 #ifdef INADDR_NONE
 471         if ( u == INADDR_NONE ) return 0;
 472 #endif
 473         if ( u == 0xffffffffUL || u == (unsigned long) -1L ) return 0;
 474
 475         in->s_addr = u;
 476         return 1;
 477 }
 478 #endif
 479
 480 int
 481 ldap_int_connect_cbs(LDAP *ld, Sockbuf *sb, ber_socket_t *s, LDAPURLDesc *srv, struct sockaddr *addr)
 482 {
 483         struct ldapoptions *lo;
 484         ldaplist *ll;
 485         ldap_conncb *cb;
 486         int rc;
 487
 488         ber_sockbuf_ctrl( sb, LBER_SB_OPT_SET_FD, s );
 489
 490         /* Invoke all handle-specific callbacks first */
 491         lo = &ld->ld_options;
 492         for (ll = lo->ldo_conn_cbs; ll; ll = ll->ll_next) {
 493                 cb = ll->ll_data;
 494                 rc = cb->lc_add( ld, sb, srv, addr, cb );
 495                 /* on any failure, call the teardown functions for anything
 496                  * that previously succeeded
 497                  */
 498                 if ( rc ) {
 499                         ldaplist *l2;
 500                         for (l2 = lo->ldo_conn_cbs; l2 != ll; l2 = l2->ll_next) {
 501                                 cb = l2->ll_data;
 502                                 cb->lc_del( ld, sb, cb );
 503                         }
 504                         /* a failure might have implicitly closed the fd */
 505                         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, s );
 506                         return rc;
 507                 }
 508         }
 509         lo = LDAP_INT_GLOBAL_OPT();
 510         for (ll = lo->ldo_conn_cbs; ll; ll = ll->ll_next) {
 511                 cb = ll->ll_data;
 512                 rc = cb->lc_add( ld, sb, srv, addr, cb );
 513                 if ( rc ) {
 514                         ldaplist *l2;
 515                         for (l2 = lo->ldo_conn_cbs; l2 != ll; l2 = l2->ll_next) {
 516                                 cb = l2->ll_data;
 517                                 cb->lc_del( ld, sb, cb );
 518                         }
 519                         lo = &ld->ld_options;
 520                         for (l2 = lo->ldo_conn_cbs; l2; l2 = l2->ll_next) {
 521                                 cb = l2->ll_data;
 522                                 cb->lc_del( ld, sb, cb );
 523                         }
 524                         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, s );
 525                         return rc;
 526                 }
 527         }
 528         return 0;
 529 }
 530
 531 int
 532 ldap_connect_to_host(LDAP *ld, Sockbuf *sb,
 533         int proto, LDAPURLDesc *srv,
 534         int async )
 535 {
 536         int     rc;
 537         int     socktype, port;
 538         ber_socket_t            s = AC_SOCKET_INVALID;
 539         char *host;
 540
 541 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
 542         char serv[7];
 543         int err;
 544         struct addrinfo hints, *res, *sai;
 545 #else
 546         int i;
 547         int use_hp = 0;
 548         struct hostent *hp = NULL;
 549         struct hostent he_buf;
 550         struct in_addr in;
 551         char *ha_buf=NULL;
 552 #endif
 553
 554         if ( srv->lud_host == NULL || *srv->lud_host == 0 ) {
 555                 host = "localhost";
 556         } else {
 557                 host = srv->lud_host;
 558         }
 559
 560         port = srv->lud_port;
 561
 562         if( !port ) {
 563                 if( strcmp(srv->lud_scheme, "ldaps") == 0 ) {
 564                         port = LDAPS_PORT;
 565                 } else {
 566                         port = LDAP_PORT;
 567                 }
 568         }
 569
 570         switch(proto) {
 571         case LDAP_PROTO_TCP: socktype = SOCK_STREAM;
 572                 osip_debug( ld,
 573                         "ldap_connect_to_host: TCP %s:%d\n",
 574                         host, port, 0);
 575                 break;
 576         case LDAP_PROTO_UDP: socktype = SOCK_DGRAM;
 577                 osip_debug( ld,
 578                         "ldap_connect_to_host: UDP %s:%d\n",
 579                         host, port, 0);
 580                 break;
 581         default:
 582                 osip_debug( ld, "ldap_connect_to_host: unknown proto: %d\n",
 583                         proto, 0, 0 );
 584                 return -1;
 585         }
 586
 587 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
 588         memset( &hints, '\0', sizeof(hints) );
 589 #ifdef USE_AI_ADDRCONFIG /* FIXME: configure test needed */
 590         /* Use AI_ADDRCONFIG only on systems where its known to be needed. */
 591         hints.ai_flags = AI_ADDRCONFIG;
 592 #endif
 593         hints.ai_family = ldap_int_inet4or6;
 594         hints.ai_socktype = socktype;
 595         snprintf(serv, sizeof serv, "%d", port );
 596
 597         /* most getaddrinfo(3) use non-threadsafe resolver libraries */
 598         LDAP_MUTEX_LOCK(&ldap_int_resolv_mutex);
 599
 600         err = getaddrinfo( host, serv, &hints, &res );
 601
 602         LDAP_MUTEX_UNLOCK(&ldap_int_resolv_mutex);
 603
 604         if ( err != 0 ) {
 605                 osip_debug(ld, "ldap_connect_to_host: getaddrinfo failed: %s\n",
 606                         AC_GAI_STRERROR(err), 0, 0);
 607                 return -1;
 608         }
 609         rc = -1;
 610
 611         for( sai=res; sai != NULL; sai=sai->ai_next) {
 612                 if( sai->ai_addr == NULL ) {
 613                         osip_debug(ld, "ldap_connect_to_host: getaddrinfo "
 614                                 "ai_addr is NULL?\n", 0, 0, 0);
 615                         continue;
 616                 }
 617
 618                 /* we assume AF_x and PF_x are equal for all x */
 619                 s = ldap_int_socket( ld, sai->ai_family, socktype );
 620                 if ( s == AC_SOCKET_INVALID ) {
 621                         continue;
 622                 }
 623
 624                 if ( ldap_int_prepare_socket(ld, s, proto ) == -1 ) {
 625                         ldap_pvt_close_socket(ld, s);
 626                         break;
 627                 }
 628
 629                 switch (sai->ai_family) {
 630 #ifdef LDAP_PF_INET6
 631                         case AF_INET6: {
 632                                 char addr[INET6_ADDRSTRLEN];
 633                                 inet_ntop( AF_INET6,
 634                                         &((struct sockaddr_in6 *)sai->ai_addr)->sin6_addr,
 635                                         addr, sizeof addr);
 636                                 osip_debug(ld, "ldap_connect_to_host: Trying %s %s\n",
 637                                         addr, serv, 0);
 638                         } break;
 639 #endif
 640                         case AF_INET: {
 641                                 char addr[INET_ADDRSTRLEN];
 642                                 inet_ntop( AF_INET,
 643                                         &((struct sockaddr_in *)sai->ai_addr)->sin_addr,
 644                                         addr, sizeof addr);
 645                                 osip_debug(ld, "ldap_connect_to_host: Trying %s:%s\n",
 646                                         addr, serv, 0);
 647                         } break;
 648                 }
 649
 650                 rc = ldap_pvt_connect( ld, s,
 651                         sai->ai_addr, sai->ai_addrlen, async );
 652                 if ( rc == 0 || rc == -2 ) {
 653                         err = ldap_int_connect_cbs( ld, sb, &s, srv, sai->ai_addr );
 654                         if ( err )
 655                                 rc = err;
 656                         else
 657                                 break;
 658                 }
 659                 ldap_pvt_close_socket(ld, s);
 660         }
 661         freeaddrinfo(res);
 662
 663 #else
 664         if (! inet_aton( host, &in ) ) {
 665                 int local_h_errno;
 666                 rc = ldap_pvt_gethostbyname_a( host, &he_buf, &ha_buf,
 667                         &hp, &local_h_errno );
 668
 669                 if ( (rc < 0) || (hp == NULL) ) {
 670 #ifdef HAVE_WINSOCK
 671                         ldap_pvt_set_errno( WSAGetLastError() );
 672 #else
 673                         /* not exactly right, but... */
 674                         ldap_pvt_set_errno( EHOSTUNREACH );
 675 #endif
 676                         if (ha_buf) LDAP_FREE(ha_buf);
 677                         return -1;
 678                 }
 679
 680                 use_hp = 1;
 681         }
 682
 683         rc = s = -1;
 684         for ( i = 0; !use_hp || (hp->h_addr_list[i] != 0); ++i, rc = -1 ) {
 685                 struct sockaddr_in      sin;
 686
 687                 s = ldap_int_socket( ld, PF_INET, socktype );
 688                 if ( s == AC_SOCKET_INVALID ) {
 689                         /* use_hp ? continue : break; */
 690                         break;
 691                 }
 692
 693                 if ( ldap_int_prepare_socket( ld, s, proto ) == -1 ) {
 694                         ldap_pvt_close_socket(ld, s);
 695                         break;
 696                 }
 697
 698                 (void)memset((char *)&sin, '\0', sizeof sin);
 699                 sin.sin_family = AF_INET;
 700                 sin.sin_port = htons((unsigned short) port);
 701
 702                 if( use_hp ) {
 703                         AC_MEMCPY( &sin.sin_addr, hp->h_addr_list[i],
 704                                 sizeof(sin.sin_addr) );
 705                 } else {
 706                         AC_MEMCPY( &sin.sin_addr, &in.s_addr,
 707                                 sizeof(sin.sin_addr) );
 708                 }
 709
 710 #ifdef HAVE_INET_NTOA_B
 711                 {
 712                         /* for VxWorks */
 713                         char address[INET_ADDR_LEN];
 714                         inet_ntoa_b(sin.sin_address, address);
 715                         osip_debug(ld, "ldap_connect_to_host: Trying %s:%d\n",
 716                                 address, port, 0);
 717                 }
 718 #else
 719                 osip_debug(ld, "ldap_connect_to_host: Trying %s:%d\n",
 720                         inet_ntoa(sin.sin_addr), port, 0);
 721 #endif
 722
 723                 rc = ldap_pvt_connect(ld, s,
 724                         (struct sockaddr *)&sin, sizeof(sin),
 725                         async);
 726
 727                 if ( (rc == 0) || (rc == -2) ) {
 728                         int err = ldap_int_connect_cbs( ld, sb, &s, srv, (struct sockaddr *)&sin );
 729                         if ( err )
 730                                 rc = err;
 731                         else
 732                                 break;
 733                 }
 734
 735                 ldap_pvt_close_socket(ld, s);
 736
 737                 if (!use_hp) break;
 738         }
 739         if (ha_buf) LDAP_FREE(ha_buf);
 740 #endif
 741
 742         return rc;
 743 }
 744
 745 #if defined( HAVE_CYRUS_SASL )
 746 char *
 747 ldap_host_connected_to( Sockbuf *sb, const char *host )
 748 {
 749         ber_socklen_t   len;
 750 #ifdef LDAP_PF_INET6
 751         struct sockaddr_storage sabuf;
 752 #else
 753         struct sockaddr sabuf;
 754 #endif
 755         struct sockaddr *sa = (struct sockaddr *) &sabuf;
 756         ber_socket_t    sd;
 757
 758         (void)memset( (char *)sa, '\0', sizeof sabuf );
 759         len = sizeof sabuf;
 760
 761         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
 762         if ( getpeername( sd, sa, &len ) == -1 ) {
 763                 return( NULL );
 764         }
 765
 766         /*
 767          * do a reverse lookup on the addr to get the official hostname.
 768          * this is necessary for kerberos to work right, since the official
 769          * hostname is used as the kerberos instance.
 770          */
 771
 772         switch (sa->sa_family) {
 773 #ifdef LDAP_PF_LOCAL
 774         case AF_LOCAL:
 775                 return LDAP_STRDUP( ldap_int_hostname );
 776 #endif
 777 #ifdef LDAP_PF_INET6
 778         case AF_INET6:
 779                 {
 780                         struct in6_addr localhost = IN6ADDR_LOOPBACK_INIT;
 781                         if( memcmp ( &((struct sockaddr_in6 *)sa)->sin6_addr,
 782                                 &localhost, sizeof(localhost)) == 0 )
 783                         {
 784                                 return LDAP_STRDUP( ldap_int_hostname );
 785                         }
 786                 }
 787                 break;
 788 #endif
 789         case AF_INET:
 790                 {
 791                         struct in_addr localhost;
 792                         localhost.s_addr = htonl( INADDR_ANY );
 793
 794                         if( memcmp ( &((struct sockaddr_in *)sa)->sin_addr,
 795                                 &localhost, sizeof(localhost) ) == 0 )
 796                         {
 797                                 return LDAP_STRDUP( ldap_int_hostname );
 798                         }
 799
 800 #ifdef INADDR_LOOPBACK
 801                         localhost.s_addr = htonl( INADDR_LOOPBACK );
 802
 803                         if( memcmp ( &((struct sockaddr_in *)sa)->sin_addr,
 804                                 &localhost, sizeof(localhost) ) == 0 )
 805                         {
 806                                 return LDAP_STRDUP( ldap_int_hostname );
 807                         }
 808 #endif
 809                 }
 810                 break;
 811
 812         default:
 813                 return( NULL );
 814                 break;
 815         }
 816
 817         {
 818                 char *herr;
 819 #ifdef NI_MAXHOST
 820                 char hbuf[NI_MAXHOST];
 821 #elif defined( MAXHOSTNAMELEN )
 822                 char hbuf[MAXHOSTNAMELEN];
 823 #else
 824                 char hbuf[256];
 825 #endif
 826                 hbuf[0] = 0;
 827
 828                 if (ldap_pvt_get_hname( sa, len, hbuf, sizeof(hbuf), &herr ) == 0
 829                         && hbuf[0] )
 830                 {
 831                         return LDAP_STRDUP( hbuf );
 832                 }
 833         }
 834
 835         return host ? LDAP_STRDUP( host ) : NULL;
 836 }
 837 #endif
 838
 839
 840 struct selectinfo {
 841 #ifdef HAVE_POLL
 842         /* for UNIX poll(2) */
 843         int si_maxfd;
 844         struct pollfd si_fds[FD_SETSIZE];
 845 #else
 846         /* for UNIX select(2) */
 847         fd_set  si_readfds;
 848         fd_set  si_writefds;
 849         fd_set  si_use_readfds;
 850         fd_set  si_use_writefds;
 851 #endif
 852 };
 853
 854 void
 855 ldap_mark_select_write( LDAP *ld, Sockbuf *sb )
 856 {
 857         struct selectinfo       *sip;
 858         ber_socket_t            sd;
 859
 860         sip = (struct selectinfo *)ld->ld_selectinfo;
 861
 862         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
 863
 864 #ifdef HAVE_POLL
 865         /* for UNIX poll(2) */
 866         {
 867                 int empty=-1;
 868                 int i;
 869                 for(i=0; i < sip->si_maxfd; i++) {
 870                         if( sip->si_fds[i].fd == sd ) {
 871                                 sip->si_fds[i].events |= POLL_WRITE;
 872                                 return;
 873                         }
 874                         if( empty==-1 && sip->si_fds[i].fd == -1 ) {
 875                                 empty=i;
 876                         }
 877                 }
 878
 879                 if( empty == -1 ) {
 880                         if( sip->si_maxfd >= FD_SETSIZE ) {
 881                                 /* FIXME */
 882                                 return;
 883                         }
 884                         empty = sip->si_maxfd++;
 885                 }
 886
 887                 sip->si_fds[empty].fd = sd;
 888                 sip->si_fds[empty].events = POLL_WRITE;
 889         }
 890 #else
 891         /* for UNIX select(2) */
 892         if ( !FD_ISSET( sd, &sip->si_writefds )) {
 893                 FD_SET( sd, &sip->si_writefds );
 894         }
 895 #endif
 896 }
 897
 898
 899 void
 900 ldap_mark_select_read( LDAP *ld, Sockbuf *sb )
 901 {
 902         struct selectinfo       *sip;
 903         ber_socket_t            sd;
 904
 905         sip = (struct selectinfo *)ld->ld_selectinfo;
 906
 907         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
 908
 909 #ifdef HAVE_POLL
 910         /* for UNIX poll(2) */
 911         {
 912                 int empty=-1;
 913                 int i;
 914                 for(i=0; i < sip->si_maxfd; i++) {
 915                         if( sip->si_fds[i].fd == sd ) {
 916                                 sip->si_fds[i].events |= POLL_READ;
 917                                 return;
 918                         }
 919                         if( empty==-1 && sip->si_fds[i].fd == -1 ) {
 920                                 empty=i;
 921                         }
 922                 }
 923
 924                 if( empty == -1 ) {
 925                         if( sip->si_maxfd >= FD_SETSIZE ) {
 926                                 /* FIXME */
 927                                 return;
 928                         }
 929                         empty = sip->si_maxfd++;
 930                 }
 931
 932                 sip->si_fds[empty].fd = sd;
 933                 sip->si_fds[empty].events = POLL_READ;
 934         }
 935 #else
 936         /* for UNIX select(2) */
 937         if ( !FD_ISSET( sd, &sip->si_readfds )) {
 938                 FD_SET( sd, &sip->si_readfds );
 939         }
 940 #endif
 941 }
 942
 943
 944 void
 945 ldap_mark_select_clear( LDAP *ld, Sockbuf *sb )
 946 {
 947         struct selectinfo       *sip;
 948         ber_socket_t            sd;
 949
 950         sip = (struct selectinfo *)ld->ld_selectinfo;
 951
 952         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
 953
 954 #ifdef HAVE_POLL
 955         /* for UNIX poll(2) */
 956         {
 957                 int i;
 958                 for(i=0; i < sip->si_maxfd; i++) {
 959                         if( sip->si_fds[i].fd == sd ) {
 960                                 sip->si_fds[i].fd = -1;
 961                         }
 962                 }
 963         }
 964 #else
 965         /* for UNIX select(2) */
 966         FD_CLR( sd, &sip->si_writefds );
 967         FD_CLR( sd, &sip->si_readfds );
 968 #endif
 969 }
 970
 971 void
 972 ldap_clear_select_write( LDAP *ld, Sockbuf *sb )
 973 {
 974         struct selectinfo       *sip;
 975         ber_socket_t            sd;
 976
 977         sip = (struct selectinfo *)ld->ld_selectinfo;
 978
 979         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
 980
 981 #ifdef HAVE_POLL
 982         /* for UNIX poll(2) */
 983         {
 984                 int i;
 985                 for(i=0; i < sip->si_maxfd; i++) {
 986                         if( sip->si_fds[i].fd == sd ) {
 987                                 sip->si_fds[i].events &= ~POLL_WRITE;
 988                         }
 989                 }
 990         }
 991 #else
 992         /* for UNIX select(2) */
 993         FD_CLR( sd, &sip->si_writefds );
 994 #endif
 995 }
 996
 997
 998 int
 999 ldap_is_write_ready( LDAP *ld, Sockbuf *sb )
1000 {
1001         struct selectinfo       *sip;
1002         ber_socket_t            sd;
1003
1004         sip = (struct selectinfo *)ld->ld_selectinfo;
1005
1006         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
1007
1008 #ifdef HAVE_POLL
1009         /* for UNIX poll(2) */
1010         {
1011                 int i;
1012                 for(i=0; i < sip->si_maxfd; i++) {
1013                         if( sip->si_fds[i].fd == sd ) {
1014                                 return sip->si_fds[i].revents & POLL_WRITE;
1015                         }
1016                 }
1017
1018                 return 0;
1019         }
1020 #else
1021         /* for UNIX select(2) */
1022         return( FD_ISSET( sd, &sip->si_use_writefds ));
1023 #endif
1024 }
1025
1026
1027 int
1028 ldap_is_read_ready( LDAP *ld, Sockbuf *sb )
1029 {
1030         struct selectinfo       *sip;
1031         ber_socket_t            sd;
1032
1033         sip = (struct selectinfo *)ld->ld_selectinfo;
1034
1035         if (ber_sockbuf_ctrl( sb, LBER_SB_OPT_DATA_READY, NULL ))
1036                 return 1;
1037
1038         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
1039
1040 #ifdef HAVE_POLL
1041         /* for UNIX poll(2) */
1042         {
1043                 int i;
1044                 for(i=0; i < sip->si_maxfd; i++) {
1045                         if( sip->si_fds[i].fd == sd ) {
1046                                 return sip->si_fds[i].revents & POLL_READ;
1047                         }
1048                 }
1049
1050                 return 0;
1051         }
1052 #else
1053         /* for UNIX select(2) */
1054         return( FD_ISSET( sd, &sip->si_use_readfds ));
1055 #endif
1056 }
1057
1058
1059 void *
1060 ldap_new_select_info( void )
1061 {
1062         struct selectinfo       *sip;
1063
1064         sip = (struct selectinfo *)LDAP_CALLOC( 1, sizeof( struct selectinfo ));
1065
1066         if ( sip == NULL ) return NULL;
1067
1068 #ifdef HAVE_POLL
1069         /* for UNIX poll(2) */
1070         /* sip->si_maxfd=0 */
1071 #else
1072         /* for UNIX select(2) */
1073         FD_ZERO( &sip->si_readfds );
1074         FD_ZERO( &sip->si_writefds );
1075 #endif
1076
1077         return( (void *)sip );
1078 }
1079
1080
1081 void
1082 ldap_free_select_info( void *sip )
1083 {
1084         LDAP_FREE( sip );
1085 }
1086
1087
1088 #ifndef HAVE_POLL
1089 int ldap_int_tblsize = 0;
1090
1091 void
1092 ldap_int_ip_init( void )
1093 {
1094 #if defined( HAVE_SYSCONF )
1095         long tblsize = sysconf( _SC_OPEN_MAX );
1096         if( tblsize > INT_MAX ) tblsize = INT_MAX;
1097
1098 #elif defined( HAVE_GETDTABLESIZE )
1099         int tblsize = getdtablesize();
1100 #else
1101         int tblsize = FD_SETSIZE;
1102 #endif /* !USE_SYSCONF */
1103
1104 #ifdef FD_SETSIZE
1105         if( tblsize > FD_SETSIZE ) tblsize = FD_SETSIZE;
1106 #endif  /* FD_SETSIZE */
1107
1108         ldap_int_tblsize = tblsize;
1109 }
1110 #endif
1111
1112
1113 int
1114 ldap_int_select( LDAP *ld, struct timeval *timeout )
1115 {
1116         int rc;
1117         struct selectinfo       *sip;
1118
1119         Debug( LDAP_DEBUG_TRACE, "ldap_int_select\n", 0, 0, 0 );
1120
1121 #ifndef HAVE_POLL
1122         if ( ldap_int_tblsize == 0 ) ldap_int_ip_init();
1123 #endif
1124
1125         sip = (struct selectinfo *)ld->ld_selectinfo;
1126         assert( sip != NULL );
1127
1128 #ifdef HAVE_POLL
1129         {
1130                 int to = timeout ? TV2MILLISEC( timeout ) : INFTIM;
1131                 rc = poll( sip->si_fds, sip->si_maxfd, to );
1132         }
1133 #else
1134         sip->si_use_readfds = sip->si_readfds;
1135         sip->si_use_writefds = sip->si_writefds;
1136
1137         rc = select( ldap_int_tblsize,
1138                 &sip->si_use_readfds, &sip->si_use_writefds,
1139                 NULL, timeout );
1140 #endif
1141
1142         return rc;
1143 }