git.sur5r.net Git - openldap/blob - servers/slapd/daemon.c

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
   4  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   5  */
   6
   7 #include "portable.h"
   8
   9 #include <stdio.h>
  10
  11 #include <ac/ctype.h>
  12 #include <ac/errno.h>
  13 #include <ac/signal.h>
  14 #include <ac/socket.h>
  15 #include <ac/string.h>
  16 #include <ac/time.h>
  17 #include <ac/unistd.h>
  18
  19 #include "ldap_pvt.h"
  20 #include "lutil.h"
  21 #include "slap.h"
  22
  23 #ifdef HAVE_TCPD
  24 #include <tcpd.h>
  25
  26 int allow_severity = LOG_INFO;
  27 int deny_severity = LOG_NOTICE;
  28 #endif /* TCP Wrappers */
  29
  30 #ifdef LDAP_PF_LOCAL
  31 #include <sys/stat.h>
  32 #endif /* LDAP_PF_LOCAL */
  33
  34 /* globals */
  35 time_t starttime;
  36 ber_socket_t dtblsize;
  37
  38 typedef union slap_sockaddr {
  39         struct sockaddr sa_addr;
  40         struct sockaddr_in sa_in_addr;
  41 #ifdef LDAP_PF_INET6
  42         struct sockaddr_in6 sa_in6_addr;
  43 #endif
  44 #ifdef LDAP_PF_LOCAL
  45         struct sockaddr_un sa_un_addr;
  46 #endif
  47 } Sockaddr;
  48
  49 typedef struct slap_listener {
  50         char* sl_url;
  51         char* sl_name;
  52 #ifdef HAVE_TLS
  53         int             sl_is_tls;
  54 #endif
  55         ber_socket_t            sl_sd;
  56         Sockaddr sl_sa;
  57 #define sl_addr sl_sa.sa_in_addr
  58 } Listener;
  59
  60 Listener **slap_listeners = NULL;
  61
  62 static ber_socket_t wake_sds[2];
  63
  64 #ifdef NO_THREADS
  65 static int waking;
  66 #define WAKE_LISTENER(w) \
  67 ((w && !waking) ? tcp_write( wake_sds[1], "0", 1 ), waking=1 : 0)
  68 #else
  69 #define WAKE_LISTENER(w) \
  70 do { if (w) tcp_write( wake_sds[1], "0", 1 ); } while(0)
  71 #endif
  72
  73 #ifdef HAVE_NT_SERVICE_MANAGER
  74 /* in nt_main.c */
  75 extern ldap_pvt_thread_cond_t                   started_event;
  76 extern int        is_NT_Service;
  77 #endif
  78
  79 #ifndef HAVE_WINSOCK
  80 static
  81 #endif
  82 volatile sig_atomic_t slapd_shutdown = 0;
  83
  84 static ldap_pvt_thread_t        listener_tid;
  85
  86 static struct slap_daemon {
  87         ldap_pvt_thread_mutex_t sd_mutex;
  88
  89         int sd_nactives;
  90
  91 #ifndef HAVE_WINSOCK
  92         /* In winsock, accept() returns values higher than dtblsize
  93                 so don't bother with this optimization */
  94         int sd_nfds;
  95 #endif
  96
  97         fd_set sd_actives;
  98         fd_set sd_readers;
  99         fd_set sd_writers;
 100 } slap_daemon;
 101
 102 /*
 103  * Add a descriptor to daemon control
 104  */
 105 static void slapd_add(ber_socket_t s) {
 106         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 107
 108         assert( !FD_ISSET( s, &slap_daemon.sd_actives ));
 109         assert( !FD_ISSET( s, &slap_daemon.sd_readers ));
 110         assert( !FD_ISSET( s, &slap_daemon.sd_writers ));
 111
 112 #ifndef HAVE_WINSOCK
 113         if (s >= slap_daemon.sd_nfds) {
 114                 slap_daemon.sd_nfds = s + 1;
 115         }
 116 #endif
 117
 118         FD_SET( s, &slap_daemon.sd_actives );
 119         FD_SET( s, &slap_daemon.sd_readers );
 120
 121         Debug( LDAP_DEBUG_CONNS, "daemon: added %ld%s%s\n",
 122                 (long) s,
 123             FD_ISSET(s, &slap_daemon.sd_readers) ? "r" : "",
 124                 FD_ISSET(s, &slap_daemon.sd_writers) ? "w" : "" );
 125
 126         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 127 }
 128
 129 /*
 130  * Remove the descriptor from daemon control
 131  */
 132 void slapd_remove(ber_socket_t s, int wake) {
 133         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 134
 135         Debug( LDAP_DEBUG_CONNS, "daemon: removing %ld%s%s\n",
 136                 (long) s,
 137             FD_ISSET(s, &slap_daemon.sd_readers) ? "r" : "",
 138                 FD_ISSET(s, &slap_daemon.sd_writers) ? "w" : "" );
 139
 140         FD_CLR( s, &slap_daemon.sd_actives );
 141         FD_CLR( s, &slap_daemon.sd_readers );
 142         FD_CLR( s, &slap_daemon.sd_writers );
 143
 144         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 145         WAKE_LISTENER(wake);
 146 }
 147
 148 void slapd_clr_write(ber_socket_t s, int wake) {
 149         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 150
 151         assert( FD_ISSET( s, &slap_daemon.sd_actives) );
 152         FD_CLR( s, &slap_daemon.sd_writers );
 153
 154         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 155         WAKE_LISTENER(wake);
 156 }
 157
 158 void slapd_set_write(ber_socket_t s, int wake) {
 159         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 160
 161         assert( FD_ISSET( s, &slap_daemon.sd_actives) );
 162         if (!FD_ISSET(s, &slap_daemon.sd_writers))
 163             FD_SET( (unsigned) s, &slap_daemon.sd_writers );
 164
 165         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 166         WAKE_LISTENER(wake);
 167 }
 168
 169 void slapd_clr_read(ber_socket_t s, int wake) {
 170         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 171
 172         assert( FD_ISSET( s, &slap_daemon.sd_actives) );
 173         FD_CLR( s, &slap_daemon.sd_readers );
 174
 175         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 176         WAKE_LISTENER(wake);
 177 }
 178
 179 void slapd_set_read(ber_socket_t s, int wake) {
 180         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 181
 182         assert( FD_ISSET( s, &slap_daemon.sd_actives) );
 183         if (!FD_ISSET(s, &slap_daemon.sd_readers))
 184             FD_SET( s, &slap_daemon.sd_readers );
 185
 186         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 187         WAKE_LISTENER(wake);
 188 }
 189
 190 static void slapd_close(ber_socket_t s) {
 191         Debug( LDAP_DEBUG_CONNS, "daemon: closing %ld\n",
 192                 (long) s, 0, 0 );
 193         tcp_close(s);
 194 }
 195
 196
 197 static Listener * open_listener( const char* url )
 198 {
 199         int     tmp, rc;
 200         Listener l;
 201         Listener *li;
 202         LDAPURLDesc *lud;
 203         char *s;
 204         int port;
 205 #ifdef HAVE_GETADDRINFO
 206         char serv[7];
 207         struct addrinfo hints, *res, *sai;
 208         int err;
 209 #endif
 210
 211         rc = ldap_url_parse( url, &lud );
 212
 213         if( rc != LDAP_URL_SUCCESS ) {
 214                 Debug( LDAP_DEBUG_ANY,
 215                         "daemon: listen URL \"%s\" parse error=%d\n",
 216                         url, rc, 0 );
 217                 return NULL;
 218         }
 219
 220 #ifndef HAVE_TLS
 221         if( ldap_pvt_url_scheme2tls( lud->lud_scheme ) ) {
 222                 Debug( LDAP_DEBUG_ANY,
 223                         "daemon: TLS not supported (%s)\n",
 224                         url, 0, 0 );
 225                 ldap_free_urldesc( lud );
 226                 return NULL;
 227         }
 228
 229         if(! lud->lud_port ) {
 230                 lud->lud_port = LDAP_PORT;
 231         }
 232
 233 #else
 234         l.sl_is_tls = ldap_pvt_url_scheme2tls( lud->lud_scheme );
 235
 236         if(! lud->lud_port ) {
 237                 lud->lud_port = l.sl_is_tls ? LDAPS_PORT : LDAP_PORT;
 238         }
 239 #endif
 240
 241 #ifdef HAVE_GETADDRINFO
 242         memset( &hints, '\0', sizeof(hints) );
 243         hints.ai_flags = AI_PASSIVE;
 244         hints.ai_family = AF_UNSPEC;
 245         hints.ai_socktype = SOCK_STREAM;
 246
 247 #  ifdef LDAP_PF_LOCAL
 248         if ( ldap_pvt_url_scheme2proto(lud->lud_scheme) == LDAP_PROTO_IPC ) {
 249                 if ( lud->lud_host == NULL || lud->lud_host[0] == '\0' ) {
 250                         err = getaddrinfo(NULL, LDAPI_SOCK, &hints, &res);
 251                         if (!err)
 252                                 unlink( LDAPI_SOCK );
 253                 } else {
 254                         err = getaddrinfo(NULL, lud->lud_host, &hints, &res);
 255                         if (!err)
 256                                 unlink( lud->lud_host );
 257                 }
 258         } else
 259 #  endif /* LDAP_PF_LOCAL */
 260         {
 261                 snprintf(serv, sizeof serv, "%d", lud->lud_port);
 262                 if( lud->lud_host == NULL || lud->lud_host[0] == '\0'
 263                         || strcmp(lud->lud_host, "*") == 0 )
 264                 {
 265                         err = getaddrinfo(NULL, serv, &hints, &res);
 266                 } else {
 267                         err = getaddrinfo(lud->lud_host, serv, &hints, &res);
 268                 }
 269         }
 270
 271         if ( err ) {
 272                 Debug( LDAP_DEBUG_ANY, "daemon: getaddrinfo failed\n", 0, 0, 0);
 273                 ldap_free_urldesc( lud );
 274                 return NULL;
 275         }
 276
 277         ldap_free_urldesc( lud );
 278         sai = res;
 279         do {
 280                 l.sl_sd = socket( sai->ai_family, sai->ai_socktype, sai->ai_protocol);
 281                 if ( l.sl_sd == AC_SOCKET_INVALID ) {
 282                         int err = sock_errno();
 283                         Debug( LDAP_DEBUG_ANY,
 284                                 "daemon: socket() failed errno=%d (%s)\n", err,
 285                                 sock_errstr(err), 0 );
 286                         continue;
 287                 }
 288
 289                 if ( sai->ai_family != AF_LOCAL ) {
 290 #else
 291
 292         if ( ldap_pvt_url_scheme2proto(lud->lud_scheme) == LDAP_PROTO_IPC ) {
 293 #ifdef LDAP_PF_LOCAL
 294                 port = 0;
 295                 (void) memset( (void *)&l.sl_sa.sa_un_addr, '\0', sizeof(l.sl_sa.sa_un_addr) );
 296
 297                 l.sl_sa.sa_un_addr.sun_family = AF_LOCAL;
 298
 299                 /* hack: overload the host to be the path */
 300                 if ( lud->lud_host == NULL || lud->lud_host[0] == '\0' ) {
 301                         strcpy( l.sl_sa.sa_un_addr.sun_path, LDAPI_SOCK );
 302                 } else {
 303                         if ( strlen(lud->lud_host) > (sizeof(l.sl_sa.sa_un_addr.sun_path) - 1) ) {
 304                                 Debug( LDAP_DEBUG_ANY,
 305                                         "daemon: domain socket path (%s) too long in URL: %s",
 306                                         lud->lud_host, url, 0);
 307                                 ldap_free_urldesc( lud );
 308                                 return NULL;
 309                         }
 310                         strcpy( l.sl_sa.sa_un_addr.sun_path, lud->lud_host );
 311                 }
 312                 unlink( l.sl_sa.sa_un_addr.sun_path );
 313 #if 0
 314                 /* I don't think we need to set this. */
 315                 l.sl_sa.sa_un_addr.sun_len = sizeof( l.sl_sa.sa_un_addr.sun_len ) +
 316                         sizeof( l.sl_sa.sa_un_addr.sun_family ) +
 317                         strlen( l.sl_sa.sa_un_addr.sun_path ) + 1;
 318 #endif
 319 #else
 320                 Debug( LDAP_DEBUG_ANY, "daemon: URL scheme not supported: %s",
 321                         url, 0, 0);
 322                 ldap_free_urldesc( lud );
 323                 return NULL;
 324 #endif /* LDAP_PF_LOCAL */
 325         } else {
 326
 327         port = lud->lud_port;
 328
 329         (void) memset( (void*) &l.sl_addr, '\0', sizeof(l.sl_addr) );
 330
 331         l.sl_addr.sin_family = AF_INET;
 332         l.sl_addr.sin_port = htons( (unsigned short) lud->lud_port );
 333
 334         if( lud->lud_host == NULL || lud->lud_host[0] == '\0'
 335                 || strcmp(lud->lud_host, "*") == 0 )
 336         {
 337                 l.sl_addr.sin_addr.s_addr = htonl(INADDR_ANY);
 338
 339         } else {
 340                 /* host or address was specified */
 341                 if( !inet_aton( lud->lud_host, &l.sl_addr.sin_addr ) ) {
 342                         struct hostent *he = gethostbyname( lud->lud_host );
 343                         if( he == NULL ) {
 344                                 Debug( LDAP_DEBUG_ANY,
 345                                         "daemon: invalid host (%s) in URL: %s",
 346                                         lud->lud_host, url, 0);
 347                                 ldap_free_urldesc( lud );
 348                                 return NULL;
 349                         }
 350
 351                         memcpy( &l.sl_addr.sin_addr, he->h_addr,
 352                                sizeof( l.sl_addr.sin_addr ) );
 353                 }
 354         }
 355         }
 356
 357         ldap_free_urldesc( lud );
 358
 359         l.sl_sd = socket( l.sl_sa.sa_addr.sa_family, SOCK_STREAM, 0 );
 360         if ( l.sl_sd == AC_SOCKET_INVALID ) {
 361                 int err = sock_errno();
 362                 Debug( LDAP_DEBUG_ANY,
 363                         "daemon: socket() failed errno=%d (%s)\n", err,
 364                         sock_errstr(err), 0 );
 365                 return NULL;
 366         }
 367
 368 #ifndef HAVE_WINSOCK
 369         if ( l.sl_sd >= dtblsize ) {
 370                 Debug( LDAP_DEBUG_ANY,
 371                         "daemon: listener descriptor %ld is too great %ld\n",
 372                         (long) l.sl_sd, (long) dtblsize, 0 );
 373                 tcp_close( l.sl_sd );
 374                 return NULL;
 375         }
 376 #endif
 377
 378 #ifdef LDAP_PF_LOCAL
 379         /* for IP sockets only */
 380         if ( l.sl_sa.sa_addr.sa_family == AF_INET ) {
 381 #endif /* LDAP_PF_LOCAL */
 382 #endif /* HAVE_GETADDRINFO */
 383
 384 #ifdef SO_REUSEADDR
 385         /* enable address reuse */
 386         tmp = 1;
 387         rc = setsockopt( l.sl_sd, SOL_SOCKET, SO_REUSEADDR,
 388                 (char *) &tmp, sizeof(tmp) );
 389         if ( rc == AC_SOCKET_ERROR ) {
 390                 int err = sock_errno();
 391                 Debug( LDAP_DEBUG_ANY,
 392                "slapd(%ld): setsockopt(SO_REUSEADDR) failed errno=%d (%s)\n",
 393                 (long) l.sl_sd, err, sock_errstr(err) );
 394         }
 395 #endif
 396 #ifdef SO_KEEPALIVE
 397         /* enable keep alives */
 398         tmp = 1;
 399         rc = setsockopt( l.sl_sd, SOL_SOCKET, SO_KEEPALIVE,
 400                 (char *) &tmp, sizeof(tmp) );
 401         if ( rc == AC_SOCKET_ERROR ) {
 402                 int err = sock_errno();
 403                 Debug( LDAP_DEBUG_ANY,
 404                         "slapd(%ld): setsockopt(SO_KEEPALIVE) failed errno=%d (%s)\n",
 405                 (long) l.sl_sd, err, sock_errstr(err) );
 406         }
 407 #endif
 408 #ifdef TCP_NODELAY
 409         /* enable no delay */
 410         tmp = 1;
 411         rc = setsockopt( l.sl_sd, IPPROTO_TCP, TCP_NODELAY,
 412                 (char *)&tmp, sizeof(tmp) );
 413         if ( rc == AC_SOCKET_ERROR ) {
 414                 int err = sock_errno();
 415                 Debug( LDAP_DEBUG_ANY,
 416                         "slapd(%ld): setsockopt(TCP_NODELAY) failed errno=%d (%s)\n",
 417                 (long) l.sl_sd, err, sock_errstr(err) );
 418         }
 419 #endif
 420
 421 #ifdef HAVE_GETADDRINFO
 422                 } /* sai->ai_family != AF_LOCAL */
 423                 if (!bind(l.sl_sd, sai->ai_addr, sai->ai_addrlen))
 424                         break;
 425                 err = sock_errno();
 426                 Debug( LDAP_DEBUG_ANY, "daemon: bind(%ld) failed errno=%d (%s)\n",
 427                         (long) l.sl_sd, err, sock_errstr(err) );
 428                 tcp_close( l.sl_sd );
 429         } while ((sai = sai->ai_next) != NULL);
 430
 431         if (!sai) {
 432                 Debug( LDAP_DEBUG_ANY, "daemon: bind(%ld) failed\n",
 433                         (long) l.sl_sd, 0, 0 );
 434                 return NULL;
 435         }
 436
 437         switch ( sai->ai_family ) {
 438 #  ifdef LDAP_PF_LOCAL
 439         case AF_LOCAL:
 440                 if ( chmod( (char *)sai->ai_addr, S_IRWXU ) < 0 ) {
 441                         int err = sock_errno();
 442                         Debug( LDAP_DEBUG_ANY, "daemon: fchmod(%ld) failed errno=%d (%s)",
 443                                 (long) l.sl_sd, err, sock_errstr(err) );
 444                         tcp_close( l.sl_sd );
 445                         return NULL;
 446                 }
 447                 l.sl_name = ch_malloc( strlen((char *)sai->ai_addr) + sizeof("PATH=") );
 448                 sprintf( l.sl_name, "PATH=%s", sai->ai_addr );
 449                 break;
 450 #  endif /* LDAP_PF_LOCAL */
 451
 452         case AF_INET: {
 453                 char addr[INET_ADDRSTRLEN];
 454                 inet_ntop( AF_INET,
 455                         &((struct sockaddr_in *)sai->ai_addr)->sin_addr,
 456                         addr, sizeof(addr) );
 457                 l.sl_name = ch_malloc( strlen(addr) + strlen(serv) + sizeof("IP=:") );
 458                 sprintf( l.sl_name, "IP=%s:%s", addr, serv );
 459         } break;
 460
 461 #  ifdef LDAP_PF_INET6
 462         case AF_INET6: {
 463                 char addr[INET6_ADDRSTRLEN];
 464                 inet_ntop( AF_INET6,
 465                         &((struct sockaddr_in6 *)sai->ai_addr)->sin6_addr,
 466                         addr, sizeof addr);
 467                 l.sl_name = ch_malloc( strlen(addr) + strlen(serv) + sizeof("IP= ") );
 468                 sprintf( l.sl_name, "IP=%s %s", addr, serv );
 469         } break;
 470 #  endif /* LDAP_PF_INET6 */
 471
 472         default:
 473                 Debug( LDAP_DEBUG_ANY, "daemon: unsupported address family (%d)\n",
 474                         (int) sai->ai_family, 0, 0 );
 475                 break;
 476         }
 477 #else
 478 #ifdef LDAP_PF_LOCAL
 479         /* close conditional */
 480         }
 481 #endif /* LDAP_PF_LOCAL */
 482
 483         switch ( l.sl_sa.sa_addr.sa_family ) {
 484 #ifdef LDAP_PF_LOCAL
 485                 case AF_LOCAL:
 486                         rc = bind( l.sl_sd, (struct sockaddr *)&l.sl_sa,
 487                                 sizeof(l.sl_sa.sa_un_addr) );
 488                         break;
 489 #endif
 490
 491                 case AF_INET:
 492                         rc = bind( l.sl_sd, (struct sockaddr *)&l.sl_sa,
 493                                 sizeof(l.sl_sa.sa_in_addr) );
 494                         break;
 495
 496                 default:
 497                         rc = AC_SOCKET_ERROR;
 498                         errno = EINVAL;
 499                         break;
 500         }
 501
 502         if ( rc == AC_SOCKET_ERROR ) {
 503                 int err = sock_errno();
 504                 Debug( LDAP_DEBUG_ANY, "daemon: bind(%ld) failed errno=%d (%s)\n",
 505                 (long) l.sl_sd, err, sock_errstr(err) );
 506                 tcp_close( l.sl_sd );
 507                 return NULL;
 508         }
 509
 510         switch ( l.sl_sa.sa_addr.sa_family ) {
 511 #ifdef LDAP_PF_LOCAL
 512                 case AF_LOCAL:
 513                         if ( chmod( l.sl_sa.sa_un_addr.sun_path, S_IRWXU ) < 0 ) {
 514                                 int err = sock_errno();
 515                                 Debug( LDAP_DEBUG_ANY,
 516                                         "daemon: chmod(%ld) failed errno=%d (%s)",
 517                                         (long) l.sl_sd, err, sock_errstr(err) );
 518                                 tcp_close( l.sl_sd );
 519                                 return NULL;
 520                         }
 521
 522                         l.sl_name = ch_malloc( strlen(l.sl_sa.sa_un_addr.sun_path)
 523                                 + sizeof("PATH=") );
 524                         sprintf( l.sl_name, "PATH=%s", l.sl_sa.sa_un_addr.sun_path );
 525                         break;
 526 #endif /* LDAP_PF_LOCAL */
 527
 528                 case AF_INET:
 529                         l.sl_name = ch_malloc( sizeof("IP=255.255.255.255:65336") );
 530                         s = inet_ntoa( l.sl_addr.sin_addr );
 531                         sprintf( l.sl_name, "IP=%s:%d",
 532                                 s != NULL ? s : "unknown" , port );
 533                         break;
 534
 535                 default:
 536                         l.sl_name = ch_strdup( "UNKNOWN" );
 537                         break;
 538         }
 539
 540 #endif /* HAVE_GETADDRINFO */
 541
 542         l.sl_url = ch_strdup( url );
 543         li = ch_malloc( sizeof( Listener ) );
 544         *li = l;
 545
 546         Debug( LDAP_DEBUG_TRACE, "daemon: initialized %s\n",
 547                 l.sl_url, 0, 0 );
 548
 549         return li;
 550 }
 551
 552 static int sockinit(void);
 553 static int sockdestroy(void);
 554
 555 int slapd_daemon_init( const char *urls )
 556 {
 557         int i, rc;
 558         char **u;
 559
 560         Debug( LDAP_DEBUG_ARGS, "daemon_init: %s\n",
 561                 urls ? urls : "<null>", 0, 0 );
 562
 563         if( (rc = sockinit()) != 0 ) {
 564                 return rc;
 565         }
 566
 567 #ifdef HAVE_SYSCONF
 568         dtblsize = sysconf( _SC_OPEN_MAX );
 569 #elif HAVE_GETDTABLESIZE
 570         dtblsize = getdtablesize();
 571 #else
 572         dtblsize = FD_SETSIZE;
 573 #endif
 574
 575 #ifdef FD_SETSIZE
 576         if(dtblsize > FD_SETSIZE) {
 577                 dtblsize = FD_SETSIZE;
 578         }
 579 #endif  /* !FD_SETSIZE */
 580
 581         /* open a pipe (or something equivalent connected to itself).
 582          * we write a byte on this fd whenever we catch a signal. The main
 583          * loop will be select'ing on this socket, and will wake up when
 584          * this byte arrives.
 585          */
 586         if( (rc = lutil_pair( wake_sds )) < 0 ) {
 587                 Debug( LDAP_DEBUG_ANY,
 588                         "daemon: lutil_pair() failed rc=%d\n", rc, 0, 0 );
 589                 return rc;
 590         }
 591
 592         FD_ZERO( &slap_daemon.sd_readers );
 593         FD_ZERO( &slap_daemon.sd_writers );
 594
 595         if( urls == NULL ) {
 596                 urls = "ldap:///";
 597         }
 598
 599         u = str2charray( urls, " " );
 600
 601         if( u == NULL || u[0] == NULL ) {
 602                 Debug( LDAP_DEBUG_ANY, "daemon_init: no urls (%s) provided.\n",
 603                         urls, 0, 0 );
 604
 605                 return -1;
 606         }
 607
 608         for( i=0; u[i] != NULL; i++ ) {
 609                 Debug( LDAP_DEBUG_TRACE, "daemon_init: listen on %s\n",
 610                         u[i], 0, 0 );
 611         }
 612
 613         if( i == 0 ) {
 614                 Debug( LDAP_DEBUG_ANY, "daemon_init: no listeners to open (%s)\n",
 615                         urls, 0, 0 );
 616                 charray_free( u );
 617                 return -1;
 618         }
 619
 620         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners to open...\n",
 621                 i, 0, 0 );
 622
 623         slap_listeners = ch_malloc( (i+1)*sizeof(Listener *) );
 624
 625         for(i = 0; u[i] != NULL; i++ ) {
 626                 slap_listeners[i] = open_listener( u[i] );
 627
 628                 if( slap_listeners[i] == NULL ) {
 629                         charray_free( u );
 630                         return -1;
 631                 }
 632         }
 633         slap_listeners[i] = NULL;
 634
 635         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners opened\n",
 636                 i, 0, 0 );
 637
 638         charray_free( u );
 639         ldap_pvt_thread_mutex_init( &slap_daemon.sd_mutex );
 640         return !i;
 641 }
 642
 643
 644 int
 645 slapd_daemon_destroy(void)
 646 {
 647         connections_destroy();
 648         tcp_close( wake_sds[1] );
 649         tcp_close( wake_sds[0] );
 650         sockdestroy();
 651         return 0;
 652 }
 653
 654
 655 static void *
 656 slapd_daemon_task(
 657         void *ptr
 658 )
 659 {
 660         int l;
 661         time_t  last_idle_check = slap_get_time();
 662         time( &starttime );
 663
 664         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
 665                 if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID )
 666                         continue;
 667
 668                 if ( listen( slap_listeners[l]->sl_sd, 5 ) == -1 ) {
 669                         int err = sock_errno();
 670                         Debug( LDAP_DEBUG_ANY,
 671                                 "daemon: listen(%s, 5) failed errno=%d (%s)\n",
 672                                         slap_listeners[l]->sl_url, err,
 673                                         sock_errstr(err) );
 674                         return( (void*)-1 );
 675                 }
 676
 677                 slapd_add( slap_listeners[l]->sl_sd );
 678         }
 679
 680 #ifdef HAVE_NT_SERVICE_MANAGER
 681         if ( started_event != NULL ) {
 682                 ldap_pvt_thread_cond_signal( &started_event );
 683         }
 684 #endif
 685         /* initialization complete. Here comes the loop. */
 686
 687         while ( !slapd_shutdown ) {
 688                 ber_socket_t i;
 689                 int ns;
 690                 int at;
 691                 ber_socket_t nfds;
 692 #define SLAPD_EBADF_LIMIT 10
 693                 int ebadf = 0;
 694
 695 #define SLAPD_IDLE_CHECK_LIMIT 4
 696                 time_t  now = slap_get_time();
 697
 698
 699                 fd_set                  readfds;
 700                 fd_set                  writefds;
 701                 Sockaddr                from;
 702
 703 #if defined(SLAPD_RLOOKUPS)
 704         struct hostent          *hp;
 705 #endif
 706                 struct timeval          zero;
 707                 struct timeval          *tvp;
 708
 709                 if( global_idletimeout > 0 && difftime(
 710                         last_idle_check+global_idletimeout/SLAPD_IDLE_CHECK_LIMIT,
 711                         now ) < 0 )
 712                 {
 713                         connections_timeout_idle(now);
 714                 }
 715
 716                 FD_ZERO( &writefds );
 717                 FD_ZERO( &readfds );
 718
 719                 zero.tv_sec = 0;
 720                 zero.tv_usec = 0;
 721
 722                 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 723
 724 #ifdef FD_SET_MANUAL_COPY
 725                 for( s = 0; s < nfds; s++ ) {
 726                         if(FD_ISSET( &slap_sd_readers, s )) {
 727                                 FD_SET( s, &readfds );
 728                         }
 729                         if(FD_ISSET( &slap_sd_writers, s )) {
 730                                 FD_SET( s, &writefds );
 731                         }
 732                 }
 733 #else
 734                 memcpy( &readfds, &slap_daemon.sd_readers, sizeof(fd_set) );
 735                 memcpy( &writefds, &slap_daemon.sd_writers, sizeof(fd_set) );
 736 #endif
 737                 assert(!FD_ISSET(wake_sds[0], &readfds));
 738                 FD_SET( wake_sds[0], &readfds );
 739
 740                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
 741                         if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID )
 742                                 continue;
 743                         if (!FD_ISSET(slap_listeners[l]->sl_sd, &readfds))
 744                             FD_SET( slap_listeners[l]->sl_sd, &readfds );
 745                 }
 746
 747 #ifndef HAVE_WINSOCK
 748                 nfds = slap_daemon.sd_nfds;
 749 #else
 750                 nfds = dtblsize;
 751 #endif
 752
 753                 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 754
 755                 at = ldap_pvt_thread_pool_backload(&connection_pool);
 756
 757 #if defined( HAVE_YIELDING_SELECT ) || defined( NO_THREADS )
 758                 tvp = NULL;
 759 #else
 760                 tvp = at ? &zero : NULL;
 761 #endif
 762
 763                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
 764                         if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID )
 765                                 continue;
 766
 767                         Debug( LDAP_DEBUG_CONNS,
 768                                 "daemon: select: listen=%d active_threads=%d tvp=%s\n",
 769                                         slap_listeners[l]->sl_sd, at,
 770                                         tvp == NULL ? "NULL" : "zero" );
 771                 }
 772
 773                 switch(ns = select( nfds, &readfds,
 774 #ifdef HAVE_WINSOCK
 775                         /* don't pass empty fd_set */
 776                         ( writefds.fd_count > 0 ? &writefds : NULL ),
 777 #else
 778                         &writefds,
 779 #endif
 780                         NULL, tvp ))
 781                 {
 782                 case -1: {      /* failure - try again */
 783                                 int err = sock_errno();
 784
 785                                 if( err == EBADF
 786 #ifdef HAVE_WINSOCK
 787                                         || err == WSAENOTSOCK   /* you'd think this would be EBADF */
 788 #endif
 789                                 ) {
 790                                         if (++ebadf < SLAPD_EBADF_LIMIT)
 791                                                 continue;
 792                                 }
 793
 794                                 if( err != EINTR ) {
 795                                         Debug( LDAP_DEBUG_CONNS,
 796                                                 "daemon: select failed (%d): %s\n",
 797                                                 err, sock_errstr(err), 0 );
 798
 799                                         slapd_shutdown = -1;
 800                                 }
 801                         }
 802                         continue;
 803
 804                 case 0:         /* timeout - let threads run */
 805                         ebadf = 0;
 806                         Debug( LDAP_DEBUG_CONNS, "daemon: select timeout - yielding\n",
 807                             0, 0, 0 );
 808                 ldap_pvt_thread_yield();
 809                         continue;
 810
 811                 default:        /* something happened - deal with it */
 812                         ebadf = 0;
 813                         Debug( LDAP_DEBUG_CONNS, "daemon: activity on %d descriptors\n",
 814                                 ns, 0, 0 );
 815                         /* FALL THRU */
 816                 }
 817
 818                 if( FD_ISSET( wake_sds[0], &readfds ) ) {
 819                         char c[BUFSIZ];
 820                         tcp_read( wake_sds[0], c, sizeof(c) );
 821 #ifdef NO_THREADS
 822                         waking = 0;
 823 #endif
 824                         continue;
 825                 }
 826
 827                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
 828                         ber_int_t s;
 829                         socklen_t len = sizeof(from);
 830                         long id;
 831                         unsigned ssf = 0;
 832                         char *authid = NULL;
 833
 834                         char    *dnsname;
 835                         char    *peeraddr;
 836 #ifdef LDAP_PF_LOCAL
 837                         char    peername[MAXPATHLEN + sizeof("PATH=")];
 838 #elif defined(LDAP_PF_INET6)
 839                         char    peername[sizeof("IP=ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 65535")];
 840 #else
 841                         char    peername[sizeof("IP=255.255.255.255:65336")];
 842 #endif /* LDAP_PF_LOCAL */
 843
 844                         peername[0] = '\0';
 845
 846                         if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID )
 847                                 continue;
 848
 849                         if ( !FD_ISSET( slap_listeners[l]->sl_sd, &readfds ) )
 850                                 continue;
 851
 852                         if ( (s = accept( slap_listeners[l]->sl_sd,
 853                                 (struct sockaddr *) &from, &len )) == AC_SOCKET_INVALID )
 854                         {
 855                                 int err = sock_errno();
 856                                 Debug( LDAP_DEBUG_ANY,
 857                                     "daemon: accept(%ld) failed errno=%d (%s)\n",
 858                                     (long) slap_listeners[l]->sl_sd, err,
 859                                     sock_errstr(err) );
 860                                 continue;
 861                         }
 862
 863 #ifdef LDAP_DEBUG
 864                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 865
 866                         /* newly accepted stream should not be in any of the FD SETS */
 867
 868                         assert( !FD_ISSET( s, &slap_daemon.sd_actives) );
 869                         assert( !FD_ISSET( s, &slap_daemon.sd_readers) );
 870                         assert( !FD_ISSET( s, &slap_daemon.sd_writers) );
 871
 872                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 873 #endif
 874
 875 #ifndef HAVE_WINSOCK
 876                         /* make sure descriptor number isn't too great */
 877                         if ( s >= dtblsize ) {
 878                                 Debug( LDAP_DEBUG_ANY,
 879                                         "daemon: %ld beyond descriptor table size %ld\n",
 880                                         (long) s, (long) dtblsize, 0 );
 881                                 slapd_close(s);
 882                                 continue;
 883                         }
 884 #endif
 885
 886                         Debug( LDAP_DEBUG_CONNS, "daemon: new connection on %ld\n",
 887                                 (long) s, 0, 0 );
 888
 889                         len = sizeof(from);
 890
 891                         if ( getpeername( s, (struct sockaddr *) &from, &len ) != 0 ) {
 892                                 int err = sock_errno();
 893                                 Debug( LDAP_DEBUG_ANY,
 894                                         "daemon: getpeername( %ld ) failed: errno=%d (%s)\n",
 895                                         (long) s, err, sock_errstr(err) );
 896                                 slapd_close(s);
 897                                 continue;
 898                         }
 899
 900                         switch ( from.sa_addr.sa_family ) {
 901 #  ifdef LDAP_PF_LOCAL
 902                         case AF_LOCAL:
 903                                 sprintf( peername, "PATH=%s", from.sa_un_addr.sun_path );
 904                                 ssf = LDAP_PVT_SASL_LOCAL_SSF;
 905                                 break;
 906 #endif /* LDAP_PF_LOCAL */
 907
 908 #  ifdef LDAP_PF_INET6
 909                         case AF_INET6: {
 910                                 char addr[INET6_ADDRSTRLEN];
 911                                 sprintf( peername, "IP=%s %d",
 912                                         inet_ntop( AF_INET6,
 913                                                 &from.sa_in6_addr.sin6_addr,
 914                                             addr, sizeof addr) ? addr : "unknown",
 915                                         (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
 916                         } break;
 917 #  endif /* LDAP_PF_INET6 */
 918
 919                         case AF_INET:
 920                         peeraddr = inet_ntoa( from.sa_in_addr.sin_addr );
 921                         sprintf( peername, "IP=%s:%d",
 922                                 peeraddr != NULL ? peeraddr : "unknown",
 923                                 (unsigned) ntohs( from.sa_in_addr.sin_port ) );
 924                                 break;
 925
 926                         default:
 927                                 slapd_close(s);
 928                                 continue;
 929                         }
 930                         if ( ( from.sa_addr.sa_family == AF_INET )
 931 #ifdef LDAP_PF_INET6
 932                                 || ( from.sa_addr.sa_family == AF_INET6 )
 933 #endif
 934                         ) {
 935 #ifdef SLAPD_RLOOKUPS
 936 #  ifdef LDAP_PF_INET6
 937                                 if ( from.sa_addr.sa_family == AF_INET6 )
 938                                         hp = gethostbyaddr(
 939                                                 (char *)&(from.sa_in6_addr.sin6_addr),
 940                                                 sizeof(from.sa_in6_addr.sin6_addr),
 941                                                 AF_INET6 );
 942                                 else
 943 #  endif LDAP_PF_INET6
 944                                 hp = gethostbyaddr(
 945                                         (char *) &(from.sa_in_addr.sin_addr),
 946                                         sizeof(from.sa_in_addr.sin_addr),
 947                                         AF_INET );
 948                                 dnsname = hp ? ldap_pvt_str2lower( hp->h_name ) : NULL;
 949 #else
 950                                 dnsname = NULL;
 951 #endif /* SLAPD_RLOOKUPS */
 952
 953 #ifdef HAVE_TCPD
 954                                 if ( !hosts_ctl("slapd",
 955                                                 dnsname != NULL ? dnsname : STRING_UNKNOWN,
 956                                                 peeraddr != NULL ? peeraddr : STRING_UNKNOWN,
 957                                                 STRING_UNKNOWN ))
 958                                 {
 959                                         /* DENY ACCESS */
 960                                         Statslog( LDAP_DEBUG_ANY,
 961                                                 "fd=%ld connection from %s (%s) denied.\n",
 962                                                 (long) s,
 963                                                 dnsname != NULL ? dnsname : "unknown",
 964                                                 peeraddr != NULL ? peeraddr : "unknown",
 965                                                 0, 0 );
 966                                         slapd_close(s);
 967                                         continue;
 968                                 }
 969 #endif /* HAVE_TCPD */
 970                         }
 971
 972                         id = connection_init(s,
 973                                 slap_listeners[l]->sl_url,
 974                                 dnsname != NULL ? dnsname : "unknown",
 975                                 peername,
 976                                 slap_listeners[l]->sl_name,
 977 #ifdef HAVE_TLS
 978                                 slap_listeners[l]->sl_is_tls,
 979 #else
 980                                 0,
 981 #endif
 982                                 ssf,
 983                                 authid );
 984
 985                         if( authid ) ch_free(authid);
 986
 987                         if( id < 0 ) {
 988                                 Debug( LDAP_DEBUG_ANY,
 989                                         "daemon: connection_init(%ld, %s, %s) failed.\n",
 990                                         (long) s,
 991                                         peername,
 992                                         slap_listeners[l]->sl_name );
 993                                 slapd_close(s);
 994                                 continue;
 995                         }
 996
 997                         Statslog( LDAP_DEBUG_STATS,
 998                                 "daemon: conn=%ld fd=%ld connection from %s (%s) accepted.\n",
 999                                 id, (long) s,
1000                                 peername,
1001                                 slap_listeners[l]->sl_name,
1002                                 0 );
1003
1004                         slapd_add( s );
1005                         continue;
1006                 }
1007
1008 #ifdef LDAP_DEBUG
1009                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
1010 #ifdef HAVE_WINSOCK
1011                 for ( i = 0; i < readfds.fd_count; i++ ) {
1012                         Debug( LDAP_DEBUG_CONNS, " %d%s",
1013                                 readfds.fd_array[i], "r", 0 );
1014                 }
1015                 for ( i = 0; i < writefds.fd_count; i++ ) {
1016                         Debug( LDAP_DEBUG_CONNS, " %d%s",
1017                                 writefds.fd_array[i], "w", 0 );
1018                 }
1019 #else
1020                 for ( i = 0; i < nfds; i++ ) {
1021                         int     r, w;
1022                         int     is_listener = 0;
1023
1024                         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1025                                 if ( i == slap_listeners[l]->sl_sd ) {
1026                                         is_listener = 1;
1027                                         break;
1028                                 }
1029                         }
1030                         if ( is_listener ) {
1031                                 continue;
1032                         }
1033                         r = FD_ISSET( i, &readfds );
1034                         w = FD_ISSET( i, &writefds );
1035                         if ( r || w ) {
1036                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", i,
1037                                     r ? "r" : "", w ? "w" : "" );
1038                         }
1039                 }
1040 #endif
1041                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
1042 #endif
1043
1044                 /* loop through the writers */
1045 #ifdef HAVE_WINSOCK
1046                 for ( i = 0; i < writefds.fd_count; i++ )
1047 #else
1048                 for ( i = 0; i < nfds; i++ )
1049 #endif
1050                 {
1051                         ber_socket_t wd;
1052                         int is_listener = 0;
1053 #ifdef HAVE_WINSOCK
1054                         wd = writefds.fd_array[i];
1055 #else
1056                         if( ! FD_ISSET( i, &writefds ) ) {
1057                                 continue;
1058                         }
1059                         wd = i;
1060 #endif
1061
1062                         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1063                                 if ( i == slap_listeners[l]->sl_sd ) {
1064                                         is_listener = 1;
1065                                         break;
1066                                 }
1067                         }
1068                         if ( is_listener ) {
1069                                 continue;
1070                         }
1071                         Debug( LDAP_DEBUG_CONNS,
1072                                 "daemon: write active on %d\n",
1073                                 wd, 0, 0 );
1074
1075                         /*
1076                          * NOTE: it is possible that the connection was closed
1077                          * and that the stream is now inactive.
1078                          * connection_write() must valid the stream is still
1079                          * active.
1080                          */
1081
1082                         if ( connection_write( wd ) < 0 ) {
1083                                 FD_CLR( (unsigned) wd, &readfds );
1084                                 slapd_close( wd );
1085                         }
1086                 }
1087
1088 #ifdef HAVE_WINSOCK
1089                 for ( i = 0; i < readfds.fd_count; i++ )
1090 #else
1091                 for ( i = 0; i < nfds; i++ )
1092 #endif
1093                 {
1094                         ber_socket_t rd;
1095                         int is_listener = 0;
1096
1097 #ifdef HAVE_WINSOCK
1098                         rd = readfds.fd_array[i];
1099 #else
1100                         if( ! FD_ISSET( i, &readfds ) ) {
1101                                 continue;
1102                         }
1103                         rd = i;
1104 #endif
1105
1106                         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1107                                 if ( rd == slap_listeners[l]->sl_sd ) {
1108                                         is_listener = 1;
1109                                         break;
1110                                 }
1111                         }
1112                         if ( is_listener ) {
1113                                 continue;
1114                         }
1115
1116                         Debug ( LDAP_DEBUG_CONNS,
1117                                 "daemon: read activity on %d\n", rd, 0, 0 );
1118
1119                         /*
1120                          * NOTE: it is possible that the connection was closed
1121                          * and that the stream is now inactive.
1122                          * connection_read() must valid the stream is still
1123                          * active.
1124                          */
1125
1126                         if ( connection_read( rd ) < 0 ) {
1127                                 slapd_close( rd );
1128                         }
1129                 }
1130                 ldap_pvt_thread_yield();
1131         }
1132
1133         if( slapd_shutdown > 0 ) {
1134                 Debug( LDAP_DEBUG_TRACE,
1135                         "daemon: shutdown requested and initiated.\n",
1136                         0, 0, 0 );
1137
1138         } else if ( slapd_shutdown < 0 ) {
1139 #ifdef HAVE_NT_SERVICE_MANAGER
1140                 if (slapd_shutdown == -1)
1141                     Debug( LDAP_DEBUG_TRACE,
1142                           "daemon: shutdown initiated by Service Manager.\n",
1143                           0, 0, 0);
1144                 else
1145 #endif
1146                 Debug( LDAP_DEBUG_TRACE,
1147                         "daemon: abnormal condition, shutdown initiated.\n",
1148                         0, 0, 0 );
1149         } else {
1150                 Debug( LDAP_DEBUG_TRACE,
1151                         "daemon: no active streams, shutdown initiated.\n",
1152                         0, 0, 0 );
1153         }
1154
1155         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1156                 if ( slap_listeners[l]->sl_sd != AC_SOCKET_INVALID ) {
1157 #ifdef LDAP_PF_LOCAL
1158                         if ( slap_listeners[l]->sl_sa.sa_addr.sa_family == AF_LOCAL ) {
1159                                 unlink( slap_listeners[l]->sl_sa.sa_un_addr.sun_path );
1160                         }
1161 #endif /* LDAP_PF_LOCAL */
1162                         slapd_close( slap_listeners[l]->sl_sd );
1163                         break;
1164                 }
1165         }
1166
1167         Debug( LDAP_DEBUG_ANY,
1168             "slapd shutdown: waiting for %d threads to terminate\n",
1169             ldap_pvt_thread_pool_backload(&connection_pool), 0, 0 );
1170
1171         ldap_pvt_thread_pool_destroy(&connection_pool, 1);
1172
1173         return NULL;
1174 }
1175
1176
1177 int slapd_daemon( void )
1178 {
1179         int rc;
1180
1181         connections_init();
1182
1183 #define SLAPD_LISTENER_THREAD 1
1184 #if defined( SLAPD_LISTENER_THREAD ) || !defined(HAVE_PTHREADS)
1185
1186         /* listener as a separate THREAD */
1187         rc = ldap_pvt_thread_create( &listener_tid,
1188                 0, slapd_daemon_task, NULL );
1189
1190         if ( rc != 0 ) {
1191                 Debug( LDAP_DEBUG_ANY,
1192                     "listener ldap_pvt_thread_create failed (%d)\n", rc, 0, 0 );
1193                 return rc;
1194         }
1195
1196         /* wait for the listener thread to complete */
1197         ldap_pvt_thread_join( listener_tid, (void *) NULL );
1198 #else
1199         /* expermimental code */
1200         listener_tid = pthread_self();
1201         slapd_daemon_task( NULL );
1202 #endif
1203
1204         return 0;
1205
1206 }
1207
1208 #ifdef HAVE_WINSOCK2
1209 int sockinit(void)
1210 {
1211     WORD wVersionRequested;
1212         WSADATA wsaData;
1213         int err;
1214
1215         wVersionRequested = MAKEWORD( 2, 0 );
1216
1217         err = WSAStartup( wVersionRequested, &wsaData );
1218         if ( err != 0 ) {
1219                 /* Tell the user that we couldn't find a usable */
1220                 /* WinSock DLL.                                  */
1221                 return -1;
1222         }
1223
1224         /* Confirm that the WinSock DLL supports 2.0.*/
1225         /* Note that if the DLL supports versions greater    */
1226         /* than 2.0 in addition to 2.0, it will still return */
1227         /* 2.0 in wVersion since that is the version we      */
1228         /* requested.                                        */
1229
1230         if ( LOBYTE( wsaData.wVersion ) != 2 ||
1231                 HIBYTE( wsaData.wVersion ) != 0 )
1232         {
1233             /* Tell the user that we couldn't find a usable */
1234             /* WinSock DLL.                                  */
1235             WSACleanup();
1236             return -1;
1237         }
1238
1239         /* The WinSock DLL is acceptable. Proceed. */
1240         return 0;
1241 }
1242
1243 int sockdestroy(void)
1244 {
1245         WSACleanup();
1246         return 0;
1247 }
1248
1249 #elif HAVE_WINSOCK
1250 static int sockinit(void)
1251 {
1252         WSADATA wsaData;
1253         if ( WSAStartup( 0x0101, &wsaData ) != 0 ) {
1254             return -1;
1255         }
1256         return 0;
1257 }
1258 static int sockdestroy(void)
1259 {
1260         WSACleanup();
1261         return 0;
1262 }
1263
1264 #else
1265 static int sockinit(void)
1266 {
1267         return 0;
1268 }
1269 static int sockdestroy(void)
1270 {
1271         return 0;
1272 }
1273 #endif
1274
1275 RETSIGTYPE
1276 slap_sig_shutdown( int sig )
1277 {
1278         Debug(LDAP_DEBUG_TRACE, "slap_sig_shutdown: signal %d\n", sig, 0, 0);
1279
1280         /*
1281          * If the NT Service Manager is controlling the server, we don't
1282          * want SIGBREAK to kill the server. For some strange reason,
1283          * SIGBREAK is generated when a user logs out.
1284          */
1285
1286 #if HAVE_NT_SERVICE_MANAGER && SIGBREAK
1287         if (is_NT_Service && sig == SIGBREAK)
1288             Debug(LDAP_DEBUG_TRACE, "slap_sig_shutdown: SIGBREAK ignored.\n",
1289                   0, 0, 0);
1290         else
1291 #endif
1292         slapd_shutdown = sig;
1293
1294         WAKE_LISTENER(1);
1295
1296         /* reinstall self */
1297         (void) SIGNAL( sig, slap_sig_shutdown );
1298 }
1299
1300 RETSIGTYPE
1301 slap_sig_wake( int sig )
1302 {
1303         WAKE_LISTENER(1);
1304
1305         /* reinstall self */
1306         (void) SIGNAL( sig, slap_sig_wake );
1307 }