external/bsd/openldap/dist/libraries/libldap/os-ip.c

   1 /* os-ip.c -- platform-specific TCP & UDP related code */
   2 /* $OpenLDAP: pkg/ldap/libraries/libldap/os-ip.c,v 1.118.2.8 2008/05/20 00:05:30 quanah Exp $ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2008 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 #endif /* SO_KEEPALIVE */
 146 #ifdef TCP_NODELAY
 147                 if ( setsockopt( s, IPPROTO_TCP, TCP_NODELAY,
 148                         (char*) &dummy, sizeof(dummy) ) == AC_SOCKET_ERROR )
 149                 {
 150                         osip_debug( ld, "ldap_prepare_socket: "
 151                                 "setsockopt(%d, TCP_NODELAY) failed (ignored).\n",
 152                                 s, 0, 0 );
 153                 }
 154 #endif /* TCP_NODELAY */
 155         }
 156 #endif /* SO_KEEPALIVE || TCP_NODELAY */
 157
 158         return 0;
 159 }
 160
 161 #ifndef HAVE_WINSOCK
 162
 163 #undef TRACE
 164 #define TRACE do { \
 165         osip_debug(ld, \
 166                 "ldap_is_socket_ready: error on socket %d: errno: %d (%s)\n", \
 167                 s, \
 168                 errno, \
 169                 sock_errstr(errno) ); \
 170 } while( 0 )
 171
 172 /*
 173  * check the socket for errors after select returned.
 174  */
 175 static int
 176 ldap_pvt_is_socket_ready(LDAP *ld, int s)
 177 {
 178         osip_debug(ld, "ldap_is_sock_ready: %d\n",s,0,0);
 179
 180 #if defined( notyet ) /* && defined( SO_ERROR ) */
 181 {
 182         int so_errno;
 183         ber_socklen_t dummy = sizeof(so_errno);
 184         if ( getsockopt( s, SOL_SOCKET, SO_ERROR, &so_errno, &dummy )
 185                 == AC_SOCKET_ERROR )
 186         {
 187                 return -1;
 188         }
 189         if ( so_errno ) {
 190                 ldap_pvt_set_errno(so_errno);
 191                 TRACE;
 192                 return -1;
 193         }
 194         return 0;
 195 }
 196 #else
 197 {
 198         /* error slippery */
 199 #ifdef LDAP_PF_INET6
 200         struct sockaddr_storage sin;
 201 #else
 202         struct sockaddr_in sin;
 203 #endif
 204         char ch;
 205         ber_socklen_t dummy = sizeof(sin);
 206         if ( getpeername( s, (struct sockaddr *) &sin, &dummy )
 207                 == AC_SOCKET_ERROR )
 208         {
 209                 /* XXX: needs to be replace with ber_stream_read() */
 210                 read(s, &ch, 1);
 211                 TRACE;
 212                 return -1;
 213         }
 214         return 0;
 215 }
 216 #endif
 217         return -1;
 218 }
 219 #undef TRACE
 220
 221 #endif /* HAVE_WINSOCK */
 222
 223 /* NOTE: this is identical to analogous code in os-local.c */
 224 int
 225 ldap_int_poll(
 226         LDAP *ld,
 227         ber_socket_t s,
 228         struct timeval *tvp )
 229 {
 230         int             rc;
 231
 232
 233         osip_debug(ld, "ldap_int_poll: fd: %d tm: %ld\n",
 234                 s, tvp ? tvp->tv_sec : -1L, 0);
 235
 236 #ifdef HAVE_POLL
 237         {
 238                 struct pollfd fd;
 239                 int timeout = INFTIM;
 240
 241                 fd.fd = s;
 242                 fd.events = POLL_WRITE;
 243
 244                 if ( tvp != NULL ) {
 245                         timeout = TV2MILLISEC( tvp );
 246                 }
 247                 do {
 248                         fd.revents = 0;
 249                         rc = poll( &fd, 1, timeout );
 250
 251                 } while ( rc == AC_SOCKET_ERROR && errno == EINTR &&
 252                         LDAP_BOOL_GET( &ld->ld_options, LDAP_BOOL_RESTART ) );
 253
 254                 if ( rc == AC_SOCKET_ERROR ) {
 255                         return rc;
 256                 }
 257
 258                 if ( timeout == 0 && rc == 0 ) {
 259                         return -2;
 260                 }
 261
 262                 if ( fd.revents & POLL_WRITE ) {
 263                         if ( ldap_pvt_is_socket_ready( ld, s ) == -1 ) {
 264                                 return -1;
 265                         }
 266
 267                         if ( ldap_pvt_ndelay_off( ld, s ) == -1 ) {
 268                                 return -1;
 269                         }
 270                         return 0;
 271                 }
 272         }
 273 #else
 274         {
 275                 fd_set          wfds, *z = NULL;
 276 #ifdef HAVE_WINSOCK
 277                 fd_set          efds;
 278 #endif
 279                 struct timeval  tv = { 0 };
 280
 281 #if defined( FD_SETSIZE ) && !defined( HAVE_WINSOCK )
 282                 if ( s >= FD_SETSIZE ) {
 283                         rc = AC_SOCKET_ERROR;
 284                         tcp_close( s );
 285                         ldap_pvt_set_errno( EMFILE );
 286                         return rc;
 287                 }
 288 #endif
 289
 290                 if ( tvp != NULL ) {
 291                         tv = *tvp;
 292                 }
 293
 294                 do {
 295                         FD_ZERO(&wfds);
 296                         FD_SET(s, &wfds );
 297
 298 #ifdef HAVE_WINSOCK
 299                         FD_ZERO(&efds);
 300                         FD_SET(s, &efds );
 301 #endif
 302
 303                         rc = select( ldap_int_tblsize, z, &wfds,
 304 #ifdef HAVE_WINSOCK
 305                                 &efds,
 306 #else
 307                                 z,
 308 #endif
 309                                 tvp ? &tv : NULL );
 310                 } while ( rc == AC_SOCKET_ERROR && errno == EINTR &&
 311                         LDAP_BOOL_GET( &ld->ld_options, LDAP_BOOL_RESTART ) );
 312
 313                 if ( rc == AC_SOCKET_ERROR ) {
 314                         return rc;
 315                 }
 316
 317                 if ( rc == 0 && tvp && tvp->tv_sec == 0 && tvp->tv_usec == 0 ) {
 318                         return -2;
 319                 }
 320
 321 #ifdef HAVE_WINSOCK
 322                 /* This means the connection failed */
 323                 if ( FD_ISSET(s, &efds) ) {
 324                         int so_errno;
 325                         ber_socklen_t dummy = sizeof(so_errno);
 326                         if ( getsockopt( s, SOL_SOCKET, SO_ERROR,
 327                                 (char *) &so_errno, &dummy ) == AC_SOCKET_ERROR || !so_errno )
 328                         {
 329                                 /* impossible */
 330                                 so_errno = WSAGetLastError();
 331                         }
 332                         ldap_pvt_set_errno( so_errno );
 333                         osip_debug(ld, "ldap_int_poll: error on socket %d: "
 334                                "errno: %d (%s)\n", s, errno, sock_errstr( errno ));
 335                         return -1;
 336                 }
 337 #endif
 338                 if ( FD_ISSET(s, &wfds) ) {
 339 #ifndef HAVE_WINSOCK
 340                         if ( ldap_pvt_is_socket_ready( ld, s ) == -1 ) {
 341                                 return -1;
 342                         }
 343 #endif
 344                         if ( ldap_pvt_ndelay_off(ld, s) == -1 ) {
 345                                 return -1;
 346                         }
 347                         return 0;
 348                 }
 349         }
 350 #endif
 351
 352         osip_debug(ld, "ldap_int_poll: timed out\n",0,0,0);
 353         ldap_pvt_set_errno( ETIMEDOUT );
 354         return -1;
 355 }
 356
 357 static int
 358 ldap_pvt_connect(LDAP *ld, ber_socket_t s,
 359         struct sockaddr *sin, ber_socklen_t addrlen,
 360         int async)
 361 {
 362         int rc, err;
 363         struct timeval  tv, *opt_tv = NULL;
 364
 365 #ifdef LDAP_CONNECTIONLESS
 366         /* We could do a connect() but that would interfere with
 367          * attempts to poll a broadcast address
 368          */
 369         if (LDAP_IS_UDP(ld)) {
 370                 if (ld->ld_options.ldo_peer)
 371                         ldap_memfree(ld->ld_options.ldo_peer);
 372                 ld->ld_options.ldo_peer=ldap_memalloc(sizeof(struct sockaddr));
 373                 AC_MEMCPY(ld->ld_options.ldo_peer,sin,sizeof(struct sockaddr));
 374                 return ( 0 );
 375         }
 376 #endif
 377         if ( ld->ld_options.ldo_tm_net.tv_sec >= 0 ) {
 378                 tv = ld->ld_options.ldo_tm_net;
 379                 opt_tv = &tv;
 380         }
 381
 382         osip_debug(ld, "ldap_pvt_connect: fd: %d tm: %ld async: %d\n",
 383                         s, opt_tv ? tv.tv_sec : -1L, async);
 384
 385         if ( opt_tv && ldap_pvt_ndelay_on(ld, s) == -1 )
 386                 return ( -1 );
 387
 388         if ( connect(s, sin, addrlen) != AC_SOCKET_ERROR ) {
 389                 if ( opt_tv && ldap_pvt_ndelay_off(ld, s) == -1 )
 390                         return ( -1 );
 391                 return ( 0 );
 392         }
 393
 394         err = sock_errno();
 395         if ( err != EINPROGRESS && err != EWOULDBLOCK ) {
 396                 return ( -1 );
 397         }
 398
 399         if ( async ) {
 400                 /* caller will call ldap_int_poll() as appropriate? */
 401                 return ( -2 );
 402         }
 403
 404         rc = ldap_int_poll( ld, s, opt_tv );
 405
 406         osip_debug(ld, "ldap_pvt_connect: %d\n", rc, 0, 0);
 407
 408         return rc;
 409 }
 410
 411 #ifndef HAVE_INET_ATON
 412 int
 413 ldap_pvt_inet_aton( const char *host, struct in_addr *in)
 414 {
 415         unsigned long u = inet_addr( host );
 416
 417 #ifdef INADDR_NONE
 418         if ( u == INADDR_NONE ) return 0;
 419 #endif
 420         if ( u == 0xffffffffUL || u == (unsigned long) -1L ) return 0;
 421
 422         in->s_addr = u;
 423         return 1;
 424 }
 425 #endif
 426
 427
 428 int
 429 ldap_connect_to_host(LDAP *ld, Sockbuf *sb,
 430         int proto,
 431         const char *host, int port,
 432         int async )
 433 {
 434         int     rc;
 435         int     socktype;
 436         ber_socket_t            s = AC_SOCKET_INVALID;
 437
 438 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
 439         char serv[7];
 440         int err;
 441         struct addrinfo hints, *res, *sai;
 442 #else
 443         int i;
 444         int use_hp = 0;
 445         struct hostent *hp = NULL;
 446         struct hostent he_buf;
 447         struct in_addr in;
 448         char *ha_buf=NULL;
 449 #endif
 450
 451         if( host == NULL ) host = "localhost";
 452
 453         switch(proto) {
 454         case LDAP_PROTO_TCP: socktype = SOCK_STREAM;
 455                 osip_debug( ld,
 456                         "ldap_connect_to_host: TCP %s:%d\n",
 457                         host, port, 0);
 458                 break;
 459         case LDAP_PROTO_UDP: socktype = SOCK_DGRAM;
 460                 osip_debug( ld,
 461                         "ldap_connect_to_host: UDP %s:%d\n",
 462                         host, port, 0);
 463                 break;
 464         default:
 465                 osip_debug( ld, "ldap_connect_to_host: unknown proto: %d\n",
 466                         proto, 0, 0 );
 467                 return -1;
 468         }
 469
 470 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
 471         memset( &hints, '\0', sizeof(hints) );
 472 #ifdef USE_AI_ATTRCONFIG /* FIXME: configure test needed */
 473         /* Use AI_ATTRCONFIG only on systems where its known to be needed. */
 474         hints.ai_flags = AI_ATTRCONFIG;
 475 #endif
 476         hints.ai_family = ldap_int_inet4or6;
 477         hints.ai_socktype = socktype;
 478         snprintf(serv, sizeof serv, "%d", port );
 479
 480 #ifdef LDAP_R_COMPILE
 481         /* most getaddrinfo(3) use non-threadsafe resolver libraries */
 482         ldap_pvt_thread_mutex_lock(&ldap_int_resolv_mutex);
 483 #endif
 484
 485         err = getaddrinfo( host, serv, &hints, &res );
 486
 487 #ifdef LDAP_R_COMPILE
 488         ldap_pvt_thread_mutex_unlock(&ldap_int_resolv_mutex);
 489 #endif
 490
 491         if ( err != 0 ) {
 492                 osip_debug(ld, "ldap_connect_to_host: getaddrinfo failed: %s\n",
 493                         AC_GAI_STRERROR(err), 0, 0);
 494                 return -1;
 495         }
 496         rc = -1;
 497
 498         for( sai=res; sai != NULL; sai=sai->ai_next) {
 499                 if( sai->ai_addr == NULL ) {
 500                         osip_debug(ld, "ldap_connect_to_host: getaddrinfo "
 501                                 "ai_addr is NULL?\n", 0, 0, 0);
 502                         continue;
 503                 }
 504
 505                 /* we assume AF_x and PF_x are equal for all x */
 506                 s = ldap_int_socket( ld, sai->ai_family, socktype );
 507                 if ( s == AC_SOCKET_INVALID ) {
 508                         continue;
 509                 }
 510
 511                 if ( ldap_int_prepare_socket(ld, s, proto ) == -1 ) {
 512                         ldap_pvt_close_socket(ld, s);
 513                         break;
 514                 }
 515
 516                 switch (sai->ai_family) {
 517 #ifdef LDAP_PF_INET6
 518                         case AF_INET6: {
 519                                 char addr[INET6_ADDRSTRLEN];
 520                                 inet_ntop( AF_INET6,
 521                                         &((struct sockaddr_in6 *)sai->ai_addr)->sin6_addr,
 522                                         addr, sizeof addr);
 523                                 osip_debug(ld, "ldap_connect_to_host: Trying %s %s\n",
 524                                         addr, serv, 0);
 525                         } break;
 526 #endif
 527                         case AF_INET: {
 528                                 char addr[INET_ADDRSTRLEN];
 529                                 inet_ntop( AF_INET,
 530                                         &((struct sockaddr_in *)sai->ai_addr)->sin_addr,
 531                                         addr, sizeof addr);
 532                                 osip_debug(ld, "ldap_connect_to_host: Trying %s:%s\n",
 533                                         addr, serv, 0);
 534                         } break;
 535                 }
 536
 537                 rc = ldap_pvt_connect( ld, s,
 538                         sai->ai_addr, sai->ai_addrlen, async );
 539                 if ( rc == 0 || rc == -2 ) {
 540                         ber_sockbuf_ctrl( sb, LBER_SB_OPT_SET_FD, &s );
 541                         break;
 542                 }
 543                 ldap_pvt_close_socket(ld, s);
 544         }
 545         freeaddrinfo(res);
 546
 547 #else
 548         if (! inet_aton( host, &in ) ) {
 549                 int local_h_errno;
 550                 rc = ldap_pvt_gethostbyname_a( host, &he_buf, &ha_buf,
 551                         &hp, &local_h_errno );
 552
 553                 if ( (rc < 0) || (hp == NULL) ) {
 554 #ifdef HAVE_WINSOCK
 555                         ldap_pvt_set_errno( WSAGetLastError() );
 556 #else
 557                         /* not exactly right, but... */
 558                         ldap_pvt_set_errno( EHOSTUNREACH );
 559 #endif
 560                         if (ha_buf) LDAP_FREE(ha_buf);
 561                         return -1;
 562                 }
 563
 564                 use_hp = 1;
 565         }
 566
 567         rc = s = -1;
 568         for ( i = 0; !use_hp || (hp->h_addr_list[i] != 0); ++i, rc = -1 ) {
 569                 struct sockaddr_in      sin;
 570
 571                 s = ldap_int_socket( ld, PF_INET, socktype );
 572                 if ( s == AC_SOCKET_INVALID ) {
 573                         /* use_hp ? continue : break; */
 574                         break;
 575                 }
 576
 577                 if ( ldap_int_prepare_socket( ld, s, proto ) == -1 ) {
 578                         ldap_pvt_close_socket(ld, s);
 579                         break;
 580                 }
 581
 582                 (void)memset((char *)&sin, '\0', sizeof sin);
 583                 sin.sin_family = AF_INET;
 584                 sin.sin_port = htons((unsigned short) port);
 585
 586                 if( use_hp ) {
 587                         AC_MEMCPY( &sin.sin_addr, hp->h_addr_list[i],
 588                                 sizeof(sin.sin_addr) );
 589                 } else {
 590                         AC_MEMCPY( &sin.sin_addr, &in.s_addr,
 591                                 sizeof(sin.sin_addr) );
 592                 }
 593
 594 #ifdef HAVE_INET_NTOA_B
 595                 {
 596                         /* for VxWorks */
 597                         char address[INET_ADDR_LEN];
 598                         inet_ntoa_b(sin.sin_address, address);
 599                         osip_debug(ld, "ldap_connect_to_host: Trying %s:%d\n",
 600                                 address, port, 0);
 601                 }
 602 #else
 603                 osip_debug(ld, "ldap_connect_to_host: Trying %s:%d\n",
 604                         inet_ntoa(sin.sin_addr), port, 0);
 605 #endif
 606
 607                 rc = ldap_pvt_connect(ld, s,
 608                         (struct sockaddr *)&sin, sizeof(sin),
 609                         async);
 610
 611                 if ( (rc == 0) || (rc == -2) ) {
 612                         ber_sockbuf_ctrl( sb, LBER_SB_OPT_SET_FD, &s );
 613                         break;
 614                 }
 615
 616                 ldap_pvt_close_socket(ld, s);
 617
 618                 if (!use_hp) break;
 619         }
 620         if (ha_buf) LDAP_FREE(ha_buf);
 621 #endif
 622
 623         return rc;
 624 }
 625
 626 #if defined( HAVE_CYRUS_SASL )
 627 char *
 628 ldap_host_connected_to( Sockbuf *sb, const char *host )
 629 {
 630         ber_socklen_t   len;
 631 #ifdef LDAP_PF_INET6
 632         struct sockaddr_storage sabuf;
 633 #else
 634         struct sockaddr sabuf;
 635 #endif
 636         struct sockaddr *sa = (struct sockaddr *) &sabuf;
 637         ber_socket_t    sd;
 638
 639         (void)memset( (char *)sa, '\0', sizeof sabuf );
 640         len = sizeof sabuf;
 641
 642         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
 643         if ( getpeername( sd, sa, &len ) == -1 ) {
 644                 return( NULL );
 645         }
 646
 647         /*
 648          * do a reverse lookup on the addr to get the official hostname.
 649          * this is necessary for kerberos to work right, since the official
 650          * hostname is used as the kerberos instance.
 651          */
 652
 653         switch (sa->sa_family) {
 654 #ifdef LDAP_PF_LOCAL
 655         case AF_LOCAL:
 656                 return LDAP_STRDUP( ldap_int_hostname );
 657 #endif
 658 #ifdef LDAP_PF_INET6
 659         case AF_INET6:
 660                 {
 661                         struct in6_addr localhost = IN6ADDR_LOOPBACK_INIT;
 662                         if( memcmp ( &((struct sockaddr_in6 *)sa)->sin6_addr,
 663                                 &localhost, sizeof(localhost)) == 0 )
 664                         {
 665                                 return LDAP_STRDUP( ldap_int_hostname );
 666                         }
 667                 }
 668                 break;
 669 #endif
 670         case AF_INET:
 671                 {
 672                         struct in_addr localhost;
 673                         localhost.s_addr = htonl( INADDR_ANY );
 674
 675                         if( memcmp ( &((struct sockaddr_in *)sa)->sin_addr,
 676                                 &localhost, sizeof(localhost) ) == 0 )
 677                         {
 678                                 return LDAP_STRDUP( ldap_int_hostname );
 679                         }
 680
 681 #ifdef INADDR_LOOPBACK
 682                         localhost.s_addr = htonl( INADDR_LOOPBACK );
 683
 684                         if( memcmp ( &((struct sockaddr_in *)sa)->sin_addr,
 685                                 &localhost, sizeof(localhost) ) == 0 )
 686                         {
 687                                 return LDAP_STRDUP( ldap_int_hostname );
 688                         }
 689 #endif
 690                 }
 691                 break;
 692
 693         default:
 694                 return( NULL );
 695                 break;
 696         }
 697
 698         {
 699                 char *herr;
 700 #ifdef NI_MAXHOST
 701                 char hbuf[NI_MAXHOST];
 702 #elif defined( MAXHOSTNAMELEN
 703                 char hbuf[MAXHOSTNAMELEN];
 704 #else
 705                 char hbuf[256];
 706 #endif
 707                 hbuf[0] = 0;
 708
 709                 if (ldap_pvt_get_hname( sa, len, hbuf, sizeof(hbuf), &herr ) == 0
 710                         && hbuf[0] )
 711                 {
 712                         return LDAP_STRDUP( hbuf );
 713                 }
 714         }
 715
 716         return host ? LDAP_STRDUP( host ) : NULL;
 717 }
 718 #endif
 719
 720
 721 struct selectinfo {
 722 #ifdef HAVE_POLL
 723         /* for UNIX poll(2) */
 724         int si_maxfd;
 725         struct pollfd si_fds[FD_SETSIZE];
 726 #else
 727         /* for UNIX select(2) */
 728         fd_set  si_readfds;
 729         fd_set  si_writefds;
 730         fd_set  si_use_readfds;
 731         fd_set  si_use_writefds;
 732 #endif
 733 };
 734
 735 void
 736 ldap_mark_select_write( LDAP *ld, Sockbuf *sb )
 737 {
 738         struct selectinfo       *sip;
 739         ber_socket_t            sd;
 740
 741         sip = (struct selectinfo *)ld->ld_selectinfo;
 742
 743         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
 744
 745 #ifdef HAVE_POLL
 746         /* for UNIX poll(2) */
 747         {
 748                 int empty=-1;
 749                 int i;
 750                 for(i=0; i < sip->si_maxfd; i++) {
 751                         if( sip->si_fds[i].fd == sd ) {
 752                                 sip->si_fds[i].events |= POLL_WRITE;
 753                                 return;
 754                         }
 755                         if( empty==-1 && sip->si_fds[i].fd == -1 ) {
 756                                 empty=i;
 757                         }
 758                 }
 759
 760                 if( empty == -1 ) {
 761                         if( sip->si_maxfd >= FD_SETSIZE ) {
 762                                 /* FIXME */
 763                                 return;
 764                         }
 765                         empty = sip->si_maxfd++;
 766                 }
 767
 768                 sip->si_fds[empty].fd = sd;
 769                 sip->si_fds[empty].events = POLL_WRITE;
 770         }
 771 #else
 772         /* for UNIX select(2) */
 773         if ( !FD_ISSET( sd, &sip->si_writefds )) {
 774                 FD_SET( sd, &sip->si_writefds );
 775         }
 776 #endif
 777 }
 778
 779
 780 void
 781 ldap_mark_select_read( LDAP *ld, Sockbuf *sb )
 782 {
 783         struct selectinfo       *sip;
 784         ber_socket_t            sd;
 785
 786         sip = (struct selectinfo *)ld->ld_selectinfo;
 787
 788         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
 789
 790 #ifdef HAVE_POLL
 791         /* for UNIX poll(2) */
 792         {
 793                 int empty=-1;
 794                 int i;
 795                 for(i=0; i < sip->si_maxfd; i++) {
 796                         if( sip->si_fds[i].fd == sd ) {
 797                                 sip->si_fds[i].events |= POLL_READ;
 798                                 return;
 799                         }
 800                         if( empty==-1 && sip->si_fds[i].fd == -1 ) {
 801                                 empty=i;
 802                         }
 803                 }
 804
 805                 if( empty == -1 ) {
 806                         if( sip->si_maxfd >= FD_SETSIZE ) {
 807                                 /* FIXME */
 808                                 return;
 809                         }
 810                         empty = sip->si_maxfd++;
 811                 }
 812
 813                 sip->si_fds[empty].fd = sd;
 814                 sip->si_fds[empty].events = POLL_READ;
 815         }
 816 #else
 817         /* for UNIX select(2) */
 818         if ( !FD_ISSET( sd, &sip->si_readfds )) {
 819                 FD_SET( sd, &sip->si_readfds );
 820         }
 821 #endif
 822 }
 823
 824
 825 void
 826 ldap_mark_select_clear( LDAP *ld, Sockbuf *sb )
 827 {
 828         struct selectinfo       *sip;
 829         ber_socket_t            sd;
 830
 831         sip = (struct selectinfo *)ld->ld_selectinfo;
 832
 833         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
 834
 835 #ifdef HAVE_POLL
 836         /* for UNIX poll(2) */
 837         {
 838                 int i;
 839                 for(i=0; i < sip->si_maxfd; i++) {
 840                         if( sip->si_fds[i].fd == sd ) {
 841                                 sip->si_fds[i].fd = -1;
 842                         }
 843                 }
 844         }
 845 #else
 846         /* for UNIX select(2) */
 847         FD_CLR( sd, &sip->si_writefds );
 848         FD_CLR( sd, &sip->si_readfds );
 849 #endif
 850 }
 851
 852
 853 int
 854 ldap_is_write_ready( LDAP *ld, Sockbuf *sb )
 855 {
 856         struct selectinfo       *sip;
 857         ber_socket_t            sd;
 858
 859         sip = (struct selectinfo *)ld->ld_selectinfo;
 860
 861         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
 862
 863 #ifdef HAVE_POLL
 864         /* for UNIX poll(2) */
 865         {
 866                 int i;
 867                 for(i=0; i < sip->si_maxfd; i++) {
 868                         if( sip->si_fds[i].fd == sd ) {
 869                                 return sip->si_fds[i].revents & POLL_WRITE;
 870                         }
 871                 }
 872
 873                 return 0;
 874         }
 875 #else
 876         /* for UNIX select(2) */
 877         return( FD_ISSET( sd, &sip->si_use_writefds ));
 878 #endif
 879 }
 880
 881
 882 int
 883 ldap_is_read_ready( LDAP *ld, Sockbuf *sb )
 884 {
 885         struct selectinfo       *sip;
 886         ber_socket_t            sd;
 887
 888         sip = (struct selectinfo *)ld->ld_selectinfo;
 889
 890         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
 891
 892 #ifdef HAVE_POLL
 893         /* for UNIX poll(2) */
 894         {
 895                 int i;
 896                 for(i=0; i < sip->si_maxfd; i++) {
 897                         if( sip->si_fds[i].fd == sd ) {
 898                                 return sip->si_fds[i].revents & POLL_READ;
 899                         }
 900                 }
 901
 902                 return 0;
 903         }
 904 #else
 905         /* for UNIX select(2) */
 906         return( FD_ISSET( sd, &sip->si_use_readfds ));
 907 #endif
 908 }
 909
 910
 911 void *
 912 ldap_new_select_info( void )
 913 {
 914         struct selectinfo       *sip;
 915
 916         sip = (struct selectinfo *)LDAP_CALLOC( 1, sizeof( struct selectinfo ));
 917
 918         if ( sip == NULL ) return NULL;
 919
 920 #ifdef HAVE_POLL
 921         /* for UNIX poll(2) */
 922         /* sip->si_maxfd=0 */
 923 #else
 924         /* for UNIX select(2) */
 925         FD_ZERO( &sip->si_readfds );
 926         FD_ZERO( &sip->si_writefds );
 927 #endif
 928
 929         return( (void *)sip );
 930 }
 931
 932
 933 void
 934 ldap_free_select_info( void *sip )
 935 {
 936         LDAP_FREE( sip );
 937 }
 938
 939
 940 #ifndef HAVE_POLL
 941 int ldap_int_tblsize = 0;
 942
 943 void
 944 ldap_int_ip_init( void )
 945 {
 946 #if defined( HAVE_SYSCONF )
 947         long tblsize = sysconf( _SC_OPEN_MAX );
 948         if( tblsize > INT_MAX ) tblsize = INT_MAX;
 949
 950 #elif defined( HAVE_GETDTABLESIZE )
 951         int tblsize = getdtablesize();
 952 #else
 953         int tblsize = FD_SETSIZE;
 954 #endif /* !USE_SYSCONF */
 955
 956 #ifdef FD_SETSIZE
 957         if( tblsize > FD_SETSIZE ) tblsize = FD_SETSIZE;
 958 #endif  /* FD_SETSIZE */
 959
 960         ldap_int_tblsize = tblsize;
 961 }
 962 #endif
 963
 964
 965 int
 966 ldap_int_select( LDAP *ld, struct timeval *timeout )
 967 {
 968         int rc;
 969         struct selectinfo       *sip;
 970
 971         Debug( LDAP_DEBUG_TRACE, "ldap_int_select\n", 0, 0, 0 );
 972
 973 #ifndef HAVE_POLL
 974         if ( ldap_int_tblsize == 0 ) ldap_int_ip_init();
 975 #endif
 976
 977         sip = (struct selectinfo *)ld->ld_selectinfo;
 978         assert( sip != NULL );
 979
 980 #ifdef HAVE_POLL
 981         {
 982                 int to = timeout ? TV2MILLISEC( timeout ) : INFTIM;
 983                 rc = poll( sip->si_fds, sip->si_maxfd, to );
 984         }
 985 #else
 986         sip->si_use_readfds = sip->si_readfds;
 987         sip->si_use_writefds = sip->si_writefds;
 988
 989         rc = select( ldap_int_tblsize,
 990                 &sip->si_use_readfds, &sip->si_use_writefds,
 991                 NULL, timeout );
 992 #endif
 993
 994         return rc;
 995 }