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 1998-2010 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 #ifdef LDAP_R_COMPILE
 596         /* most getaddrinfo(3) use non-threadsafe resolver libraries */
 597         ldap_pvt_thread_mutex_lock(&ldap_int_resolv_mutex);
 598 #endif
 599
 600         err = getaddrinfo( host, serv, &hints, &res );
 601
 602 #ifdef LDAP_R_COMPILE
 603         ldap_pvt_thread_mutex_unlock(&ldap_int_resolv_mutex);
 604 #endif
 605
 606         if ( err != 0 ) {
 607                 osip_debug(ld, "ldap_connect_to_host: getaddrinfo failed: %s\n",
 608                         AC_GAI_STRERROR(err), 0, 0);
 609                 return -1;
 610         }
 611         rc = -1;
 612
 613         for( sai=res; sai != NULL; sai=sai->ai_next) {
 614                 if( sai->ai_addr == NULL ) {
 615                         osip_debug(ld, "ldap_connect_to_host: getaddrinfo "
 616                                 "ai_addr is NULL?\n", 0, 0, 0);
 617                         continue;
 618                 }
 619
 620                 /* we assume AF_x and PF_x are equal for all x */
 621                 s = ldap_int_socket( ld, sai->ai_family, socktype );
 622                 if ( s == AC_SOCKET_INVALID ) {
 623                         continue;
 624                 }
 625
 626                 if ( ldap_int_prepare_socket(ld, s, proto ) == -1 ) {
 627                         ldap_pvt_close_socket(ld, s);
 628                         break;
 629                 }
 630
 631                 switch (sai->ai_family) {
 632 #ifdef LDAP_PF_INET6
 633                         case AF_INET6: {
 634                                 char addr[INET6_ADDRSTRLEN];
 635                                 inet_ntop( AF_INET6,
 636                                         &((struct sockaddr_in6 *)sai->ai_addr)->sin6_addr,
 637                                         addr, sizeof addr);
 638                                 osip_debug(ld, "ldap_connect_to_host: Trying %s %s\n",
 639                                         addr, serv, 0);
 640                         } break;
 641 #endif
 642                         case AF_INET: {
 643                                 char addr[INET_ADDRSTRLEN];
 644                                 inet_ntop( AF_INET,
 645                                         &((struct sockaddr_in *)sai->ai_addr)->sin_addr,
 646                                         addr, sizeof addr);
 647                                 osip_debug(ld, "ldap_connect_to_host: Trying %s:%s\n",
 648                                         addr, serv, 0);
 649                         } break;
 650                 }
 651
 652                 rc = ldap_pvt_connect( ld, s,
 653                         sai->ai_addr, sai->ai_addrlen, async );
 654                 if ( rc == 0 || rc == -2 ) {
 655                         err = ldap_int_connect_cbs( ld, sb, &s, srv, sai->ai_addr );
 656                         if ( err )
 657                                 rc = err;
 658                         else
 659                                 break;
 660                 }
 661                 ldap_pvt_close_socket(ld, s);
 662         }
 663         freeaddrinfo(res);
 664
 665 #else
 666         if (! inet_aton( host, &in ) ) {
 667                 int local_h_errno;
 668                 rc = ldap_pvt_gethostbyname_a( host, &he_buf, &ha_buf,
 669                         &hp, &local_h_errno );
 670
 671                 if ( (rc < 0) || (hp == NULL) ) {
 672 #ifdef HAVE_WINSOCK
 673                         ldap_pvt_set_errno( WSAGetLastError() );
 674 #else
 675                         /* not exactly right, but... */
 676                         ldap_pvt_set_errno( EHOSTUNREACH );
 677 #endif
 678                         if (ha_buf) LDAP_FREE(ha_buf);
 679                         return -1;
 680                 }
 681
 682                 use_hp = 1;
 683         }
 684
 685         rc = s = -1;
 686         for ( i = 0; !use_hp || (hp->h_addr_list[i] != 0); ++i, rc = -1 ) {
 687                 struct sockaddr_in      sin;
 688
 689                 s = ldap_int_socket( ld, PF_INET, socktype );
 690                 if ( s == AC_SOCKET_INVALID ) {
 691                         /* use_hp ? continue : break; */
 692                         break;
 693                 }
 694
 695                 if ( ldap_int_prepare_socket( ld, s, proto ) == -1 ) {
 696                         ldap_pvt_close_socket(ld, s);
 697                         break;
 698                 }
 699
 700                 (void)memset((char *)&sin, '\0', sizeof sin);
 701                 sin.sin_family = AF_INET;
 702                 sin.sin_port = htons((unsigned short) port);
 703
 704                 if( use_hp ) {
 705                         AC_MEMCPY( &sin.sin_addr, hp->h_addr_list[i],
 706                                 sizeof(sin.sin_addr) );
 707                 } else {
 708                         AC_MEMCPY( &sin.sin_addr, &in.s_addr,
 709                                 sizeof(sin.sin_addr) );
 710                 }
 711
 712 #ifdef HAVE_INET_NTOA_B
 713                 {
 714                         /* for VxWorks */
 715                         char address[INET_ADDR_LEN];
 716                         inet_ntoa_b(sin.sin_address, address);
 717                         osip_debug(ld, "ldap_connect_to_host: Trying %s:%d\n",
 718                                 address, port, 0);
 719                 }
 720 #else
 721                 osip_debug(ld, "ldap_connect_to_host: Trying %s:%d\n",
 722                         inet_ntoa(sin.sin_addr), port, 0);
 723 #endif
 724
 725                 rc = ldap_pvt_connect(ld, s,
 726                         (struct sockaddr *)&sin, sizeof(sin),
 727                         async);
 728
 729                 if ( (rc == 0) || (rc == -2) ) {
 730                         i = ldap_int_connect_cbs( ld, sb, &s, srv, (struct sockaddr *)&sin );
 731                         if ( i )
 732                                 rc = i;
 733                         else
 734                                 break;
 735                 }
 736
 737                 ldap_pvt_close_socket(ld, s);
 738
 739                 if (!use_hp) break;
 740         }
 741         if (ha_buf) LDAP_FREE(ha_buf);
 742 #endif
 743
 744         return rc;
 745 }
 746
 747 #if defined( HAVE_CYRUS_SASL )
 748 char *
 749 ldap_host_connected_to( Sockbuf *sb, const char *host )
 750 {
 751         ber_socklen_t   len;
 752 #ifdef LDAP_PF_INET6
 753         struct sockaddr_storage sabuf;
 754 #else
 755         struct sockaddr sabuf;
 756 #endif
 757         struct sockaddr *sa = (struct sockaddr *) &sabuf;
 758         ber_socket_t    sd;
 759
 760         (void)memset( (char *)sa, '\0', sizeof sabuf );
 761         len = sizeof sabuf;
 762
 763         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
 764         if ( getpeername( sd, sa, &len ) == -1 ) {
 765                 return( NULL );
 766         }
 767
 768         /*
 769          * do a reverse lookup on the addr to get the official hostname.
 770          * this is necessary for kerberos to work right, since the official
 771          * hostname is used as the kerberos instance.
 772          */
 773
 774         switch (sa->sa_family) {
 775 #ifdef LDAP_PF_LOCAL
 776         case AF_LOCAL:
 777                 return LDAP_STRDUP( ldap_int_hostname );
 778 #endif
 779 #ifdef LDAP_PF_INET6
 780         case AF_INET6:
 781                 {
 782                         struct in6_addr localhost = IN6ADDR_LOOPBACK_INIT;
 783                         if( memcmp ( &((struct sockaddr_in6 *)sa)->sin6_addr,
 784                                 &localhost, sizeof(localhost)) == 0 )
 785                         {
 786                                 return LDAP_STRDUP( ldap_int_hostname );
 787                         }
 788                 }
 789                 break;
 790 #endif
 791         case AF_INET:
 792                 {
 793                         struct in_addr localhost;
 794                         localhost.s_addr = htonl( INADDR_ANY );
 795
 796                         if( memcmp ( &((struct sockaddr_in *)sa)->sin_addr,
 797                                 &localhost, sizeof(localhost) ) == 0 )
 798                         {
 799                                 return LDAP_STRDUP( ldap_int_hostname );
 800                         }
 801
 802 #ifdef INADDR_LOOPBACK
 803                         localhost.s_addr = htonl( INADDR_LOOPBACK );
 804
 805                         if( memcmp ( &((struct sockaddr_in *)sa)->sin_addr,
 806                                 &localhost, sizeof(localhost) ) == 0 )
 807                         {
 808                                 return LDAP_STRDUP( ldap_int_hostname );
 809                         }
 810 #endif
 811                 }
 812                 break;
 813
 814         default:
 815                 return( NULL );
 816                 break;
 817         }
 818
 819         {
 820                 char *herr;
 821 #ifdef NI_MAXHOST
 822                 char hbuf[NI_MAXHOST];
 823 #elif defined( MAXHOSTNAMELEN )
 824                 char hbuf[MAXHOSTNAMELEN];
 825 #else
 826                 char hbuf[256];
 827 #endif
 828                 hbuf[0] = 0;
 829
 830                 if (ldap_pvt_get_hname( sa, len, hbuf, sizeof(hbuf), &herr ) == 0
 831                         && hbuf[0] )
 832                 {
 833                         return LDAP_STRDUP( hbuf );
 834                 }
 835         }
 836
 837         return host ? LDAP_STRDUP( host ) : NULL;
 838 }
 839 #endif
 840
 841
 842 struct selectinfo {
 843 #ifdef HAVE_POLL
 844         /* for UNIX poll(2) */
 845         int si_maxfd;
 846         struct pollfd si_fds[FD_SETSIZE];
 847 #else
 848         /* for UNIX select(2) */
 849         fd_set  si_readfds;
 850         fd_set  si_writefds;
 851         fd_set  si_use_readfds;
 852         fd_set  si_use_writefds;
 853 #endif
 854 };
 855
 856 void
 857 ldap_mark_select_write( LDAP *ld, Sockbuf *sb )
 858 {
 859         struct selectinfo       *sip;
 860         ber_socket_t            sd;
 861
 862         sip = (struct selectinfo *)ld->ld_selectinfo;
 863
 864         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
 865
 866 #ifdef HAVE_POLL
 867         /* for UNIX poll(2) */
 868         {
 869                 int empty=-1;
 870                 int i;
 871                 for(i=0; i < sip->si_maxfd; i++) {
 872                         if( sip->si_fds[i].fd == sd ) {
 873                                 sip->si_fds[i].events |= POLL_WRITE;
 874                                 return;
 875                         }
 876                         if( empty==-1 && sip->si_fds[i].fd == -1 ) {
 877                                 empty=i;
 878                         }
 879                 }
 880
 881                 if( empty == -1 ) {
 882                         if( sip->si_maxfd >= FD_SETSIZE ) {
 883                                 /* FIXME */
 884                                 return;
 885                         }
 886                         empty = sip->si_maxfd++;
 887                 }
 888
 889                 sip->si_fds[empty].fd = sd;
 890                 sip->si_fds[empty].events = POLL_WRITE;
 891         }
 892 #else
 893         /* for UNIX select(2) */
 894         if ( !FD_ISSET( sd, &sip->si_writefds )) {
 895                 FD_SET( sd, &sip->si_writefds );
 896         }
 897 #endif
 898 }
 899
 900
 901 void
 902 ldap_mark_select_read( LDAP *ld, Sockbuf *sb )
 903 {
 904         struct selectinfo       *sip;
 905         ber_socket_t            sd;
 906
 907         sip = (struct selectinfo *)ld->ld_selectinfo;
 908
 909         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
 910
 911 #ifdef HAVE_POLL
 912         /* for UNIX poll(2) */
 913         {
 914                 int empty=-1;
 915                 int i;
 916                 for(i=0; i < sip->si_maxfd; i++) {
 917                         if( sip->si_fds[i].fd == sd ) {
 918                                 sip->si_fds[i].events |= POLL_READ;
 919                                 return;
 920                         }
 921                         if( empty==-1 && sip->si_fds[i].fd == -1 ) {
 922                                 empty=i;
 923                         }
 924                 }
 925
 926                 if( empty == -1 ) {
 927                         if( sip->si_maxfd >= FD_SETSIZE ) {
 928                                 /* FIXME */
 929                                 return;
 930                         }
 931                         empty = sip->si_maxfd++;
 932                 }
 933
 934                 sip->si_fds[empty].fd = sd;
 935                 sip->si_fds[empty].events = POLL_READ;
 936         }
 937 #else
 938         /* for UNIX select(2) */
 939         if ( !FD_ISSET( sd, &sip->si_readfds )) {
 940                 FD_SET( sd, &sip->si_readfds );
 941         }
 942 #endif
 943 }
 944
 945
 946 void
 947 ldap_mark_select_clear( LDAP *ld, Sockbuf *sb )
 948 {
 949         struct selectinfo       *sip;
 950         ber_socket_t            sd;
 951
 952         sip = (struct selectinfo *)ld->ld_selectinfo;
 953
 954         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
 955
 956 #ifdef HAVE_POLL
 957         /* for UNIX poll(2) */
 958         {
 959                 int i;
 960                 for(i=0; i < sip->si_maxfd; i++) {
 961                         if( sip->si_fds[i].fd == sd ) {
 962                                 sip->si_fds[i].fd = -1;
 963                         }
 964                 }
 965         }
 966 #else
 967         /* for UNIX select(2) */
 968         FD_CLR( sd, &sip->si_writefds );
 969         FD_CLR( sd, &sip->si_readfds );
 970 #endif
 971 }
 972
 973
 974 int
 975 ldap_is_write_ready( LDAP *ld, Sockbuf *sb )
 976 {
 977         struct selectinfo       *sip;
 978         ber_socket_t            sd;
 979
 980         sip = (struct selectinfo *)ld->ld_selectinfo;
 981
 982         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
 983
 984 #ifdef HAVE_POLL
 985         /* for UNIX poll(2) */
 986         {
 987                 int i;
 988                 for(i=0; i < sip->si_maxfd; i++) {
 989                         if( sip->si_fds[i].fd == sd ) {
 990                                 return sip->si_fds[i].revents & POLL_WRITE;
 991                         }
 992                 }
 993
 994                 return 0;
 995         }
 996 #else
 997         /* for UNIX select(2) */
 998         return( FD_ISSET( sd, &sip->si_use_writefds ));
 999 #endif
1000 }
1001
1002
1003 int
1004 ldap_is_read_ready( LDAP *ld, Sockbuf *sb )
1005 {
1006         struct selectinfo       *sip;
1007         ber_socket_t            sd;
1008
1009         sip = (struct selectinfo *)ld->ld_selectinfo;
1010
1011         if (ber_sockbuf_ctrl( sb, LBER_SB_OPT_DATA_READY, NULL ))
1012                 return 1;
1013
1014         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
1015
1016 #ifdef HAVE_POLL
1017         /* for UNIX poll(2) */
1018         {
1019                 int i;
1020                 for(i=0; i < sip->si_maxfd; i++) {
1021                         if( sip->si_fds[i].fd == sd ) {
1022                                 return sip->si_fds[i].revents & POLL_READ;
1023                         }
1024                 }
1025
1026                 return 0;
1027         }
1028 #else
1029         /* for UNIX select(2) */
1030         return( FD_ISSET( sd, &sip->si_use_readfds ));
1031 #endif
1032 }
1033
1034
1035 void *
1036 ldap_new_select_info( void )
1037 {
1038         struct selectinfo       *sip;
1039
1040         sip = (struct selectinfo *)LDAP_CALLOC( 1, sizeof( struct selectinfo ));
1041
1042         if ( sip == NULL ) return NULL;
1043
1044 #ifdef HAVE_POLL
1045         /* for UNIX poll(2) */
1046         /* sip->si_maxfd=0 */
1047 #else
1048         /* for UNIX select(2) */
1049         FD_ZERO( &sip->si_readfds );
1050         FD_ZERO( &sip->si_writefds );
1051 #endif
1052
1053         return( (void *)sip );
1054 }
1055
1056
1057 void
1058 ldap_free_select_info( void *sip )
1059 {
1060         LDAP_FREE( sip );
1061 }
1062
1063
1064 #ifndef HAVE_POLL
1065 int ldap_int_tblsize = 0;
1066
1067 void
1068 ldap_int_ip_init( void )
1069 {
1070 #if defined( HAVE_SYSCONF )
1071         long tblsize = sysconf( _SC_OPEN_MAX );
1072         if( tblsize > INT_MAX ) tblsize = INT_MAX;
1073
1074 #elif defined( HAVE_GETDTABLESIZE )
1075         int tblsize = getdtablesize();
1076 #else
1077         int tblsize = FD_SETSIZE;
1078 #endif /* !USE_SYSCONF */
1079
1080 #ifdef FD_SETSIZE
1081         if( tblsize > FD_SETSIZE ) tblsize = FD_SETSIZE;
1082 #endif  /* FD_SETSIZE */
1083
1084         ldap_int_tblsize = tblsize;
1085 }
1086 #endif
1087
1088
1089 int
1090 ldap_int_select( LDAP *ld, struct timeval *timeout )
1091 {
1092         int rc;
1093         struct selectinfo       *sip;
1094
1095         Debug( LDAP_DEBUG_TRACE, "ldap_int_select\n", 0, 0, 0 );
1096
1097 #ifndef HAVE_POLL
1098         if ( ldap_int_tblsize == 0 ) ldap_int_ip_init();
1099 #endif
1100
1101         sip = (struct selectinfo *)ld->ld_selectinfo;
1102         assert( sip != NULL );
1103
1104 #ifdef HAVE_POLL
1105         {
1106                 int to = timeout ? TV2MILLISEC( timeout ) : INFTIM;
1107                 rc = poll( sip->si_fds, sip->si_maxfd, to );
1108         }
1109 #else
1110         sip->si_use_readfds = sip->si_readfds;
1111         sip->si_use_writefds = sip->si_writefds;
1112
1113         rc = select( ldap_int_tblsize,
1114                 &sip->si_use_readfds, &sip->si_use_writefds,
1115                 NULL, timeout );
1116 #endif
1117
1118         return rc;
1119 }