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 1998-2011 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 {
 281         int             rc;
 282
 283
 284         osip_debug(ld, "ldap_int_poll: fd: %d tm: %ld\n",
 285                 s, tvp ? tvp->tv_sec : -1L, 0);
 286
 287 #ifdef HAVE_POLL
 288         {
 289                 struct pollfd fd;
 290                 int timeout = INFTIM;
 291
 292                 fd.fd = s;
 293                 fd.events = POLL_WRITE;
 294
 295                 if ( tvp != NULL ) {
 296                         timeout = TV2MILLISEC( tvp );
 297                 }
 298                 do {
 299                         fd.revents = 0;
 300                         rc = poll( &fd, 1, timeout );
 301
 302                 } while ( rc == AC_SOCKET_ERROR && errno == EINTR &&
 303                         LDAP_BOOL_GET( &ld->ld_options, LDAP_BOOL_RESTART ) );
 304
 305                 if ( rc == AC_SOCKET_ERROR ) {
 306                         return rc;
 307                 }
 308
 309                 if ( timeout == 0 && rc == 0 ) {
 310                         return -2;
 311                 }
 312
 313                 if ( fd.revents & POLL_WRITE ) {
 314                         if ( ldap_pvt_is_socket_ready( ld, s ) == -1 ) {
 315                                 return -1;
 316                         }
 317
 318                         if ( ldap_pvt_ndelay_off( ld, s ) == -1 ) {
 319                                 return -1;
 320                         }
 321                         return 0;
 322                 }
 323         }
 324 #else
 325         {
 326                 fd_set          wfds, *z = NULL;
 327 #ifdef HAVE_WINSOCK
 328                 fd_set          efds;
 329 #endif
 330                 struct timeval  tv = { 0 };
 331
 332 #if defined( FD_SETSIZE ) && !defined( HAVE_WINSOCK )
 333                 if ( s >= FD_SETSIZE ) {
 334                         rc = AC_SOCKET_ERROR;
 335                         tcp_close( s );
 336                         ldap_pvt_set_errno( EMFILE );
 337                         return rc;
 338                 }
 339 #endif
 340
 341                 if ( tvp != NULL ) {
 342                         tv = *tvp;
 343                 }
 344
 345                 do {
 346                         FD_ZERO(&wfds);
 347                         FD_SET(s, &wfds );
 348
 349 #ifdef HAVE_WINSOCK
 350                         FD_ZERO(&efds);
 351                         FD_SET(s, &efds );
 352 #endif
 353
 354                         rc = select( ldap_int_tblsize, z, &wfds,
 355 #ifdef HAVE_WINSOCK
 356                                 &efds,
 357 #else
 358                                 z,
 359 #endif
 360                                 tvp ? &tv : NULL );
 361                 } while ( rc == AC_SOCKET_ERROR && errno == EINTR &&
 362                         LDAP_BOOL_GET( &ld->ld_options, LDAP_BOOL_RESTART ) );
 363
 364                 if ( rc == AC_SOCKET_ERROR ) {
 365                         return rc;
 366                 }
 367
 368                 if ( rc == 0 && tvp && tvp->tv_sec == 0 && tvp->tv_usec == 0 ) {
 369                         return -2;
 370                 }
 371
 372 #ifdef HAVE_WINSOCK
 373                 /* This means the connection failed */
 374                 if ( FD_ISSET(s, &efds) ) {
 375                         int so_errno;
 376                         ber_socklen_t dummy = sizeof(so_errno);
 377                         if ( getsockopt( s, SOL_SOCKET, SO_ERROR,
 378                                 (char *) &so_errno, &dummy ) == AC_SOCKET_ERROR || !so_errno )
 379                         {
 380                                 /* impossible */
 381                                 so_errno = WSAGetLastError();
 382                         }
 383                         ldap_pvt_set_errno( so_errno );
 384                         osip_debug(ld, "ldap_int_poll: error on socket %d: "
 385                                "errno: %d (%s)\n", s, errno, sock_errstr( errno ));
 386                         return -1;
 387                 }
 388 #endif
 389                 if ( FD_ISSET(s, &wfds) ) {
 390 #ifndef HAVE_WINSOCK
 391                         if ( ldap_pvt_is_socket_ready( ld, s ) == -1 ) {
 392                                 return -1;
 393                         }
 394 #endif
 395                         if ( ldap_pvt_ndelay_off(ld, s) == -1 ) {
 396                                 return -1;
 397                         }
 398                         return 0;
 399                 }
 400         }
 401 #endif
 402
 403         osip_debug(ld, "ldap_int_poll: timed out\n",0,0,0);
 404         ldap_pvt_set_errno( ETIMEDOUT );
 405         return -1;
 406 }
 407
 408 static int
 409 ldap_pvt_connect(LDAP *ld, ber_socket_t s,
 410         struct sockaddr *sin, ber_socklen_t addrlen,
 411         int async)
 412 {
 413         int rc, err;
 414         struct timeval  tv, *opt_tv = NULL;
 415
 416 #ifdef LDAP_CONNECTIONLESS
 417         /* We could do a connect() but that would interfere with
 418          * attempts to poll a broadcast address
 419          */
 420         if (LDAP_IS_UDP(ld)) {
 421                 if (ld->ld_options.ldo_peer)
 422                         ldap_memfree(ld->ld_options.ldo_peer);
 423                 ld->ld_options.ldo_peer=ldap_memalloc(sizeof(struct sockaddr));
 424                 AC_MEMCPY(ld->ld_options.ldo_peer,sin,sizeof(struct sockaddr));
 425                 return ( 0 );
 426         }
 427 #endif
 428         if ( ld->ld_options.ldo_tm_net.tv_sec >= 0 ) {
 429                 tv = ld->ld_options.ldo_tm_net;
 430                 opt_tv = &tv;
 431         }
 432
 433         osip_debug(ld, "ldap_pvt_connect: fd: %d tm: %ld async: %d\n",
 434                         s, opt_tv ? tv.tv_sec : -1L, async);
 435
 436         if ( opt_tv && ldap_pvt_ndelay_on(ld, s) == -1 )
 437                 return ( -1 );
 438
 439         if ( connect(s, sin, addrlen) != AC_SOCKET_ERROR ) {
 440                 if ( opt_tv && ldap_pvt_ndelay_off(ld, s) == -1 )
 441                         return ( -1 );
 442                 return ( 0 );
 443         }
 444
 445         err = sock_errno();
 446         if ( err != EINPROGRESS && err != EWOULDBLOCK ) {
 447                 return ( -1 );
 448         }
 449
 450         if ( async ) {
 451                 /* caller will call ldap_int_poll() as appropriate? */
 452                 return ( -2 );
 453         }
 454
 455         rc = ldap_int_poll( ld, s, opt_tv );
 456
 457         osip_debug(ld, "ldap_pvt_connect: %d\n", rc, 0, 0);
 458
 459         return rc;
 460 }
 461
 462 #ifndef HAVE_INET_ATON
 463 int
 464 ldap_pvt_inet_aton( const char *host, struct in_addr *in)
 465 {
 466         unsigned long u = inet_addr( host );
 467
 468 #ifdef INADDR_NONE
 469         if ( u == INADDR_NONE ) return 0;
 470 #endif
 471         if ( u == 0xffffffffUL || u == (unsigned long) -1L ) return 0;
 472
 473         in->s_addr = u;
 474         return 1;
 475 }
 476 #endif
 477
 478 int
 479 ldap_int_connect_cbs(LDAP *ld, Sockbuf *sb, ber_socket_t *s, LDAPURLDesc *srv, struct sockaddr *addr)
 480 {
 481         struct ldapoptions *lo;
 482         ldaplist *ll;
 483         ldap_conncb *cb;
 484         int rc;
 485
 486         ber_sockbuf_ctrl( sb, LBER_SB_OPT_SET_FD, s );
 487
 488         /* Invoke all handle-specific callbacks first */
 489         lo = &ld->ld_options;
 490         for (ll = lo->ldo_conn_cbs; ll; ll = ll->ll_next) {
 491                 cb = ll->ll_data;
 492                 rc = cb->lc_add( ld, sb, srv, addr, cb );
 493                 /* on any failure, call the teardown functions for anything
 494                  * that previously succeeded
 495                  */
 496                 if ( rc ) {
 497                         ldaplist *l2;
 498                         for (l2 = lo->ldo_conn_cbs; l2 != ll; l2 = l2->ll_next) {
 499                                 cb = l2->ll_data;
 500                                 cb->lc_del( ld, sb, cb );
 501                         }
 502                         /* a failure might have implicitly closed the fd */
 503                         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, s );
 504                         return rc;
 505                 }
 506         }
 507         lo = LDAP_INT_GLOBAL_OPT();
 508         for (ll = lo->ldo_conn_cbs; ll; ll = ll->ll_next) {
 509                 cb = ll->ll_data;
 510                 rc = cb->lc_add( ld, sb, srv, addr, cb );
 511                 if ( rc ) {
 512                         ldaplist *l2;
 513                         for (l2 = lo->ldo_conn_cbs; l2 != ll; l2 = l2->ll_next) {
 514                                 cb = l2->ll_data;
 515                                 cb->lc_del( ld, sb, cb );
 516                         }
 517                         lo = &ld->ld_options;
 518                         for (l2 = lo->ldo_conn_cbs; l2; l2 = l2->ll_next) {
 519                                 cb = l2->ll_data;
 520                                 cb->lc_del( ld, sb, cb );
 521                         }
 522                         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, s );
 523                         return rc;
 524                 }
 525         }
 526         return 0;
 527 }
 528
 529 int
 530 ldap_connect_to_host(LDAP *ld, Sockbuf *sb,
 531         int proto, LDAPURLDesc *srv,
 532         int async )
 533 {
 534         int     rc;
 535         int     socktype, port;
 536         ber_socket_t            s = AC_SOCKET_INVALID;
 537         char *host;
 538
 539 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
 540         char serv[7];
 541         int err;
 542         struct addrinfo hints, *res, *sai;
 543 #else
 544         int i;
 545         int use_hp = 0;
 546         struct hostent *hp = NULL;
 547         struct hostent he_buf;
 548         struct in_addr in;
 549         char *ha_buf=NULL;
 550 #endif
 551
 552         if ( srv->lud_host == NULL || *srv->lud_host == 0 ) {
 553                 host = "localhost";
 554         } else {
 555                 host = srv->lud_host;
 556         }
 557
 558         port = srv->lud_port;
 559
 560         if( !port ) {
 561                 if( strcmp(srv->lud_scheme, "ldaps") == 0 ) {
 562                         port = LDAPS_PORT;
 563                 } else {
 564                         port = LDAP_PORT;
 565                 }
 566         }
 567
 568         switch(proto) {
 569         case LDAP_PROTO_TCP: socktype = SOCK_STREAM;
 570                 osip_debug( ld,
 571                         "ldap_connect_to_host: TCP %s:%d\n",
 572                         host, port, 0);
 573                 break;
 574         case LDAP_PROTO_UDP: socktype = SOCK_DGRAM;
 575                 osip_debug( ld,
 576                         "ldap_connect_to_host: UDP %s:%d\n",
 577                         host, port, 0);
 578                 break;
 579         default:
 580                 osip_debug( ld, "ldap_connect_to_host: unknown proto: %d\n",
 581                         proto, 0, 0 );
 582                 return -1;
 583         }
 584
 585 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
 586         memset( &hints, '\0', sizeof(hints) );
 587 #ifdef USE_AI_ADDRCONFIG /* FIXME: configure test needed */
 588         /* Use AI_ADDRCONFIG only on systems where its known to be needed. */
 589         hints.ai_flags = AI_ADDRCONFIG;
 590 #endif
 591         hints.ai_family = ldap_int_inet4or6;
 592         hints.ai_socktype = socktype;
 593         snprintf(serv, sizeof serv, "%d", port );
 594
 595         /* most getaddrinfo(3) use non-threadsafe resolver libraries */
 596         LDAP_MUTEX_LOCK(&ldap_int_resolv_mutex);
 597
 598         err = getaddrinfo( host, serv, &hints, &res );
 599
 600         LDAP_MUTEX_UNLOCK(&ldap_int_resolv_mutex);
 601
 602         if ( err != 0 ) {
 603                 osip_debug(ld, "ldap_connect_to_host: getaddrinfo failed: %s\n",
 604                         AC_GAI_STRERROR(err), 0, 0);
 605                 return -1;
 606         }
 607         rc = -1;
 608
 609         for( sai=res; sai != NULL; sai=sai->ai_next) {
 610                 if( sai->ai_addr == NULL ) {
 611                         osip_debug(ld, "ldap_connect_to_host: getaddrinfo "
 612                                 "ai_addr is NULL?\n", 0, 0, 0);
 613                         continue;
 614                 }
 615
 616                 /* we assume AF_x and PF_x are equal for all x */
 617                 s = ldap_int_socket( ld, sai->ai_family, socktype );
 618                 if ( s == AC_SOCKET_INVALID ) {
 619                         continue;
 620                 }
 621
 622                 if ( ldap_int_prepare_socket(ld, s, proto ) == -1 ) {
 623                         ldap_pvt_close_socket(ld, s);
 624                         break;
 625                 }
 626
 627                 switch (sai->ai_family) {
 628 #ifdef LDAP_PF_INET6
 629                         case AF_INET6: {
 630                                 char addr[INET6_ADDRSTRLEN];
 631                                 inet_ntop( AF_INET6,
 632                                         &((struct sockaddr_in6 *)sai->ai_addr)->sin6_addr,
 633                                         addr, sizeof addr);
 634                                 osip_debug(ld, "ldap_connect_to_host: Trying %s %s\n",
 635                                         addr, serv, 0);
 636                         } break;
 637 #endif
 638                         case AF_INET: {
 639                                 char addr[INET_ADDRSTRLEN];
 640                                 inet_ntop( AF_INET,
 641                                         &((struct sockaddr_in *)sai->ai_addr)->sin_addr,
 642                                         addr, sizeof addr);
 643                                 osip_debug(ld, "ldap_connect_to_host: Trying %s:%s\n",
 644                                         addr, serv, 0);
 645                         } break;
 646                 }
 647
 648                 rc = ldap_pvt_connect( ld, s,
 649                         sai->ai_addr, sai->ai_addrlen, async );
 650                 if ( rc == 0 || rc == -2 ) {
 651                         err = ldap_int_connect_cbs( ld, sb, &s, srv, sai->ai_addr );
 652                         if ( err )
 653                                 rc = err;
 654                         else
 655                                 break;
 656                 }
 657                 ldap_pvt_close_socket(ld, s);
 658         }
 659         freeaddrinfo(res);
 660
 661 #else
 662         if (! inet_aton( host, &in ) ) {
 663                 int local_h_errno;
 664                 rc = ldap_pvt_gethostbyname_a( host, &he_buf, &ha_buf,
 665                         &hp, &local_h_errno );
 666
 667                 if ( (rc < 0) || (hp == NULL) ) {
 668 #ifdef HAVE_WINSOCK
 669                         ldap_pvt_set_errno( WSAGetLastError() );
 670 #else
 671                         /* not exactly right, but... */
 672                         ldap_pvt_set_errno( EHOSTUNREACH );
 673 #endif
 674                         if (ha_buf) LDAP_FREE(ha_buf);
 675                         return -1;
 676                 }
 677
 678                 use_hp = 1;
 679         }
 680
 681         rc = s = -1;
 682         for ( i = 0; !use_hp || (hp->h_addr_list[i] != 0); ++i, rc = -1 ) {
 683                 struct sockaddr_in      sin;
 684
 685                 s = ldap_int_socket( ld, PF_INET, socktype );
 686                 if ( s == AC_SOCKET_INVALID ) {
 687                         /* use_hp ? continue : break; */
 688                         break;
 689                 }
 690
 691                 if ( ldap_int_prepare_socket( ld, s, proto ) == -1 ) {
 692                         ldap_pvt_close_socket(ld, s);
 693                         break;
 694                 }
 695
 696                 (void)memset((char *)&sin, '\0', sizeof sin);
 697                 sin.sin_family = AF_INET;
 698                 sin.sin_port = htons((unsigned short) port);
 699
 700                 if( use_hp ) {
 701                         AC_MEMCPY( &sin.sin_addr, hp->h_addr_list[i],
 702                                 sizeof(sin.sin_addr) );
 703                 } else {
 704                         AC_MEMCPY( &sin.sin_addr, &in.s_addr,
 705                                 sizeof(sin.sin_addr) );
 706                 }
 707
 708 #ifdef HAVE_INET_NTOA_B
 709                 {
 710                         /* for VxWorks */
 711                         char address[INET_ADDR_LEN];
 712                         inet_ntoa_b(sin.sin_address, address);
 713                         osip_debug(ld, "ldap_connect_to_host: Trying %s:%d\n",
 714                                 address, port, 0);
 715                 }
 716 #else
 717                 osip_debug(ld, "ldap_connect_to_host: Trying %s:%d\n",
 718                         inet_ntoa(sin.sin_addr), port, 0);
 719 #endif
 720
 721                 rc = ldap_pvt_connect(ld, s,
 722                         (struct sockaddr *)&sin, sizeof(sin),
 723                         async);
 724
 725                 if ( (rc == 0) || (rc == -2) ) {
 726                         int err = ldap_int_connect_cbs( ld, sb, &s, srv, (struct sockaddr *)&sin );
 727                         if ( err )
 728                                 rc = err;
 729                         else
 730                                 break;
 731                 }
 732
 733                 ldap_pvt_close_socket(ld, s);
 734
 735                 if (!use_hp) break;
 736         }
 737         if (ha_buf) LDAP_FREE(ha_buf);
 738 #endif
 739
 740         return rc;
 741 }
 742
 743 #if defined( HAVE_CYRUS_SASL )
 744 char *
 745 ldap_host_connected_to( Sockbuf *sb, const char *host )
 746 {
 747         ber_socklen_t   len;
 748 #ifdef LDAP_PF_INET6
 749         struct sockaddr_storage sabuf;
 750 #else
 751         struct sockaddr sabuf;
 752 #endif
 753         struct sockaddr *sa = (struct sockaddr *) &sabuf;
 754         ber_socket_t    sd;
 755
 756         (void)memset( (char *)sa, '\0', sizeof sabuf );
 757         len = sizeof sabuf;
 758
 759         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
 760         if ( getpeername( sd, sa, &len ) == -1 ) {
 761                 return( NULL );
 762         }
 763
 764         /*
 765          * do a reverse lookup on the addr to get the official hostname.
 766          * this is necessary for kerberos to work right, since the official
 767          * hostname is used as the kerberos instance.
 768          */
 769
 770         switch (sa->sa_family) {
 771 #ifdef LDAP_PF_LOCAL
 772         case AF_LOCAL:
 773                 return LDAP_STRDUP( ldap_int_hostname );
 774 #endif
 775 #ifdef LDAP_PF_INET6
 776         case AF_INET6:
 777                 {
 778                         struct in6_addr localhost = IN6ADDR_LOOPBACK_INIT;
 779                         if( memcmp ( &((struct sockaddr_in6 *)sa)->sin6_addr,
 780                                 &localhost, sizeof(localhost)) == 0 )
 781                         {
 782                                 return LDAP_STRDUP( ldap_int_hostname );
 783                         }
 784                 }
 785                 break;
 786 #endif
 787         case AF_INET:
 788                 {
 789                         struct in_addr localhost;
 790                         localhost.s_addr = htonl( INADDR_ANY );
 791
 792                         if( memcmp ( &((struct sockaddr_in *)sa)->sin_addr,
 793                                 &localhost, sizeof(localhost) ) == 0 )
 794                         {
 795                                 return LDAP_STRDUP( ldap_int_hostname );
 796                         }
 797
 798 #ifdef INADDR_LOOPBACK
 799                         localhost.s_addr = htonl( INADDR_LOOPBACK );
 800
 801                         if( memcmp ( &((struct sockaddr_in *)sa)->sin_addr,
 802                                 &localhost, sizeof(localhost) ) == 0 )
 803                         {
 804                                 return LDAP_STRDUP( ldap_int_hostname );
 805                         }
 806 #endif
 807                 }
 808                 break;
 809
 810         default:
 811                 return( NULL );
 812                 break;
 813         }
 814
 815         {
 816                 char *herr;
 817 #ifdef NI_MAXHOST
 818                 char hbuf[NI_MAXHOST];
 819 #elif defined( MAXHOSTNAMELEN )
 820                 char hbuf[MAXHOSTNAMELEN];
 821 #else
 822                 char hbuf[256];
 823 #endif
 824                 hbuf[0] = 0;
 825
 826                 if (ldap_pvt_get_hname( sa, len, hbuf, sizeof(hbuf), &herr ) == 0
 827                         && hbuf[0] )
 828                 {
 829                         return LDAP_STRDUP( hbuf );
 830                 }
 831         }
 832
 833         return host ? LDAP_STRDUP( host ) : NULL;
 834 }
 835 #endif
 836
 837
 838 struct selectinfo {
 839 #ifdef HAVE_POLL
 840         /* for UNIX poll(2) */
 841         int si_maxfd;
 842         struct pollfd si_fds[FD_SETSIZE];
 843 #else
 844         /* for UNIX select(2) */
 845         fd_set  si_readfds;
 846         fd_set  si_writefds;
 847         fd_set  si_use_readfds;
 848         fd_set  si_use_writefds;
 849 #endif
 850 };
 851
 852 void
 853 ldap_mark_select_write( LDAP *ld, Sockbuf *sb )
 854 {
 855         struct selectinfo       *sip;
 856         ber_socket_t            sd;
 857
 858         sip = (struct selectinfo *)ld->ld_selectinfo;
 859
 860         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
 861
 862 #ifdef HAVE_POLL
 863         /* for UNIX poll(2) */
 864         {
 865                 int empty=-1;
 866                 int i;
 867                 for(i=0; i < sip->si_maxfd; i++) {
 868                         if( sip->si_fds[i].fd == sd ) {
 869                                 sip->si_fds[i].events |= POLL_WRITE;
 870                                 return;
 871                         }
 872                         if( empty==-1 && sip->si_fds[i].fd == -1 ) {
 873                                 empty=i;
 874                         }
 875                 }
 876
 877                 if( empty == -1 ) {
 878                         if( sip->si_maxfd >= FD_SETSIZE ) {
 879                                 /* FIXME */
 880                                 return;
 881                         }
 882                         empty = sip->si_maxfd++;
 883                 }
 884
 885                 sip->si_fds[empty].fd = sd;
 886                 sip->si_fds[empty].events = POLL_WRITE;
 887         }
 888 #else
 889         /* for UNIX select(2) */
 890         if ( !FD_ISSET( sd, &sip->si_writefds )) {
 891                 FD_SET( sd, &sip->si_writefds );
 892         }
 893 #endif
 894 }
 895
 896
 897 void
 898 ldap_mark_select_read( LDAP *ld, Sockbuf *sb )
 899 {
 900         struct selectinfo       *sip;
 901         ber_socket_t            sd;
 902
 903         sip = (struct selectinfo *)ld->ld_selectinfo;
 904
 905         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
 906
 907 #ifdef HAVE_POLL
 908         /* for UNIX poll(2) */
 909         {
 910                 int empty=-1;
 911                 int i;
 912                 for(i=0; i < sip->si_maxfd; i++) {
 913                         if( sip->si_fds[i].fd == sd ) {
 914                                 sip->si_fds[i].events |= POLL_READ;
 915                                 return;
 916                         }
 917                         if( empty==-1 && sip->si_fds[i].fd == -1 ) {
 918                                 empty=i;
 919                         }
 920                 }
 921
 922                 if( empty == -1 ) {
 923                         if( sip->si_maxfd >= FD_SETSIZE ) {
 924                                 /* FIXME */
 925                                 return;
 926                         }
 927                         empty = sip->si_maxfd++;
 928                 }
 929
 930                 sip->si_fds[empty].fd = sd;
 931                 sip->si_fds[empty].events = POLL_READ;
 932         }
 933 #else
 934         /* for UNIX select(2) */
 935         if ( !FD_ISSET( sd, &sip->si_readfds )) {
 936                 FD_SET( sd, &sip->si_readfds );
 937         }
 938 #endif
 939 }
 940
 941
 942 void
 943 ldap_mark_select_clear( LDAP *ld, Sockbuf *sb )
 944 {
 945         struct selectinfo       *sip;
 946         ber_socket_t            sd;
 947
 948         sip = (struct selectinfo *)ld->ld_selectinfo;
 949
 950         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
 951
 952 #ifdef HAVE_POLL
 953         /* for UNIX poll(2) */
 954         {
 955                 int i;
 956                 for(i=0; i < sip->si_maxfd; i++) {
 957                         if( sip->si_fds[i].fd == sd ) {
 958                                 sip->si_fds[i].fd = -1;
 959                         }
 960                 }
 961         }
 962 #else
 963         /* for UNIX select(2) */
 964         FD_CLR( sd, &sip->si_writefds );
 965         FD_CLR( sd, &sip->si_readfds );
 966 #endif
 967 }
 968
 969
 970 int
 971 ldap_is_write_ready( LDAP *ld, Sockbuf *sb )
 972 {
 973         struct selectinfo       *sip;
 974         ber_socket_t            sd;
 975
 976         sip = (struct selectinfo *)ld->ld_selectinfo;
 977
 978         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
 979
 980 #ifdef HAVE_POLL
 981         /* for UNIX poll(2) */
 982         {
 983                 int i;
 984                 for(i=0; i < sip->si_maxfd; i++) {
 985                         if( sip->si_fds[i].fd == sd ) {
 986                                 return sip->si_fds[i].revents & POLL_WRITE;
 987                         }
 988                 }
 989
 990                 return 0;
 991         }
 992 #else
 993         /* for UNIX select(2) */
 994         return( FD_ISSET( sd, &sip->si_use_writefds ));
 995 #endif
 996 }
 997
 998
 999 int
1000 ldap_is_read_ready( LDAP *ld, Sockbuf *sb )
1001 {
1002         struct selectinfo       *sip;
1003         ber_socket_t            sd;
1004
1005         sip = (struct selectinfo *)ld->ld_selectinfo;
1006
1007         if (ber_sockbuf_ctrl( sb, LBER_SB_OPT_DATA_READY, NULL ))
1008                 return 1;
1009
1010         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
1011
1012 #ifdef HAVE_POLL
1013         /* for UNIX poll(2) */
1014         {
1015                 int i;
1016                 for(i=0; i < sip->si_maxfd; i++) {
1017                         if( sip->si_fds[i].fd == sd ) {
1018                                 return sip->si_fds[i].revents & POLL_READ;
1019                         }
1020                 }
1021
1022                 return 0;
1023         }
1024 #else
1025         /* for UNIX select(2) */
1026         return( FD_ISSET( sd, &sip->si_use_readfds ));
1027 #endif
1028 }
1029
1030
1031 void *
1032 ldap_new_select_info( void )
1033 {
1034         struct selectinfo       *sip;
1035
1036         sip = (struct selectinfo *)LDAP_CALLOC( 1, sizeof( struct selectinfo ));
1037
1038         if ( sip == NULL ) return NULL;
1039
1040 #ifdef HAVE_POLL
1041         /* for UNIX poll(2) */
1042         /* sip->si_maxfd=0 */
1043 #else
1044         /* for UNIX select(2) */
1045         FD_ZERO( &sip->si_readfds );
1046         FD_ZERO( &sip->si_writefds );
1047 #endif
1048
1049         return( (void *)sip );
1050 }
1051
1052
1053 void
1054 ldap_free_select_info( void *sip )
1055 {
1056         LDAP_FREE( sip );
1057 }
1058
1059
1060 #ifndef HAVE_POLL
1061 int ldap_int_tblsize = 0;
1062
1063 void
1064 ldap_int_ip_init( void )
1065 {
1066 #if defined( HAVE_SYSCONF )
1067         long tblsize = sysconf( _SC_OPEN_MAX );
1068         if( tblsize > INT_MAX ) tblsize = INT_MAX;
1069
1070 #elif defined( HAVE_GETDTABLESIZE )
1071         int tblsize = getdtablesize();
1072 #else
1073         int tblsize = FD_SETSIZE;
1074 #endif /* !USE_SYSCONF */
1075
1076 #ifdef FD_SETSIZE
1077         if( tblsize > FD_SETSIZE ) tblsize = FD_SETSIZE;
1078 #endif  /* FD_SETSIZE */
1079
1080         ldap_int_tblsize = tblsize;
1081 }
1082 #endif
1083
1084
1085 int
1086 ldap_int_select( LDAP *ld, struct timeval *timeout )
1087 {
1088         int rc;
1089         struct selectinfo       *sip;
1090
1091         Debug( LDAP_DEBUG_TRACE, "ldap_int_select\n", 0, 0, 0 );
1092
1093 #ifndef HAVE_POLL
1094         if ( ldap_int_tblsize == 0 ) ldap_int_ip_init();
1095 #endif
1096
1097         sip = (struct selectinfo *)ld->ld_selectinfo;
1098         assert( sip != NULL );
1099
1100 #ifdef HAVE_POLL
1101         {
1102                 int to = timeout ? TV2MILLISEC( timeout ) : INFTIM;
1103                 rc = poll( sip->si_fds, sip->si_maxfd, to );
1104         }
1105 #else
1106         sip->si_use_readfds = sip->si_readfds;
1107         sip->si_use_writefds = sip->si_writefds;
1108
1109         rc = select( ldap_int_tblsize,
1110                 &sip->si_use_readfds, &sip->si_use_writefds,
1111                 NULL, timeout );
1112 #endif
1113
1114         return rc;
1115 }