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_UNIX
  31 #include <sys/stat.h>
  32 #endif /* LDAP_PF_UNIX */
  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_UNIX
  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_UNIX
 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_UNIX */
 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_UNIX ) {
 290 #else
 291
 292         if ( ldap_pvt_url_scheme2proto(lud->lud_scheme) == LDAP_PROTO_IPC ) {
 293 #ifdef LDAP_PF_UNIX
 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_UNIX;
 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_UNIX */
 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_UNIX
 379         /* for IP sockets only */
 380         if ( l.sl_sa.sa_addr.sa_family == AF_INET ) {
 381 #endif /* LDAP_PF_UNIX */
 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_UNIX */
 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_UNIX
 439         case AF_UNIX:
 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_UNIX */
 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_UNIX
 479         /* close conditional */
 480         }
 481 #endif /* LDAP_PF_UNIX */
 482
 483         switch ( l.sl_sa.sa_addr.sa_family ) {
 484 #ifdef LDAP_PF_UNIX
 485                 case AF_UNIX:
 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_UNIX
 512                 case AF_UNIX:
 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_UNIX */
 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
 832                         char    *dnsname;
 833                         char    *peeraddr;
 834 #ifdef LDAP_PF_UNIX
 835                         char    peername[MAXPATHLEN + sizeof("PATH=")];
 836 #elif defined(LDAP_PF_INET6)
 837                         char    peername[sizeof("IP=ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 65535")];
 838 #else
 839                         char    peername[sizeof("IP=255.255.255.255:65336")];
 840 #endif /* LDAP_PF_UNIX */
 841
 842                         peername[0] = '\0';
 843
 844                         if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID )
 845                                 continue;
 846
 847                         if ( !FD_ISSET( slap_listeners[l]->sl_sd, &readfds ) )
 848                                 continue;
 849
 850                         if ( (s = accept( slap_listeners[l]->sl_sd,
 851                                 (struct sockaddr *) &from, &len )) == AC_SOCKET_INVALID )
 852                         {
 853                                 int err = sock_errno();
 854                                 Debug( LDAP_DEBUG_ANY,
 855                                     "daemon: accept(%ld) failed errno=%d (%s)\n",
 856                                     (long) slap_listeners[l]->sl_sd, err,
 857                                     sock_errstr(err) );
 858                                 continue;
 859                         }
 860
 861 #ifdef LDAP_DEBUG
 862                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 863
 864                         /* newly accepted stream should not be in any of the FD SETS */
 865
 866                         assert( !FD_ISSET( s, &slap_daemon.sd_actives) );
 867                         assert( !FD_ISSET( s, &slap_daemon.sd_readers) );
 868                         assert( !FD_ISSET( s, &slap_daemon.sd_writers) );
 869
 870                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 871 #endif
 872
 873 #ifndef HAVE_WINSOCK
 874                         /* make sure descriptor number isn't too great */
 875                         if ( s >= dtblsize ) {
 876                                 Debug( LDAP_DEBUG_ANY,
 877                                         "daemon: %ld beyond descriptor table size %ld\n",
 878                                         (long) s, (long) dtblsize, 0 );
 879                                 slapd_close(s);
 880                                 continue;
 881                         }
 882 #endif
 883
 884                         Debug( LDAP_DEBUG_CONNS, "daemon: new connection on %ld\n",
 885                                 (long) s, 0, 0 );
 886
 887                         len = sizeof(from);
 888
 889                         if ( getpeername( s, (struct sockaddr *) &from, &len ) != 0 ) {
 890                                 int err = sock_errno();
 891                                 Debug( LDAP_DEBUG_ANY,
 892                                         "daemon: getpeername( %ld ) failed: errno=%d (%s)\n",
 893                                         (long) s, err, sock_errstr(err) );
 894                                 slapd_close(s);
 895                                 continue;
 896                         }
 897
 898                         switch ( from.sa_addr.sa_family ) {
 899 #  ifdef LDAP_PF_UNIX
 900                         case AF_UNIX:
 901                                 sprintf( peername, "PATH=%s", from.sa_un_addr.sun_path );
 902                                 break;
 903 #endif /* LDAP_PF_UNIX */
 904
 905 #  ifdef LDAP_PF_INET6
 906                         case AF_INET6: {
 907                                 char addr[INET6_ADDRSTRLEN];
 908                                 sprintf( peername, "IP=%s %d",
 909                                         inet_ntop( AF_INET6,
 910                                                 &from.sa_in6_addr.sin6_addr,
 911                                             addr, sizeof addr) ? addr : "unknown",
 912                                         (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
 913                         } break;
 914 #  endif /* LDAP_PF_INET6 */
 915
 916                         case AF_INET:
 917                         peeraddr = inet_ntoa( from.sa_in_addr.sin_addr );
 918                         sprintf( peername, "IP=%s:%d",
 919                                 peeraddr != NULL ? peeraddr : "unknown",
 920                                 (unsigned) ntohs( from.sa_in_addr.sin_port ) );
 921                                 break;
 922
 923                         default:
 924                                 slapd_close(s);
 925                                 continue;
 926                         }
 927                         if ( ( from.sa_addr.sa_family == AF_INET )
 928 #ifdef LDAP_PF_INET6
 929                                 || ( from.sa_addr.sa_family == AF_INET6 )
 930 #endif
 931                         ) {
 932 #ifdef SLAPD_RLOOKUPS
 933 #  ifdef LDAP_PF_INET6
 934                                 if ( from.sa_addr.sa_family == AF_INET6 )
 935                                         hp = gethostbyaddr(
 936                                                 (char *)&(from.sa_in6_addr.sin6_addr),
 937                                                 sizeof(from.sa_in6_addr.sin6_addr),
 938                                                 AF_INET6 );
 939                                 else
 940 #  endif LDAP_PF_INET6
 941                                 hp = gethostbyaddr(
 942                                         (char *) &(from.sa_in_addr.sin_addr),
 943                                         sizeof(from.sa_in_addr.sin_addr),
 944                                         AF_INET );
 945                                 dnsname = hp ? ldap_pvt_str2lower( hp->h_name ) : NULL;
 946 #else
 947                                 dnsname = NULL;
 948 #endif /* SLAPD_RLOOKUPS */
 949
 950 #ifdef HAVE_TCPD
 951                                 if ( !hosts_ctl("slapd",
 952                                                 dnsname != NULL ? dnsname : STRING_UNKNOWN,
 953                                                 peeraddr != NULL ? peeraddr : STRING_UNKNOWN,
 954                                                 STRING_UNKNOWN ))
 955                                 {
 956                                         /* DENY ACCESS */
 957                                         Statslog( LDAP_DEBUG_ANY,
 958                                                 "fd=%ld connection from %s (%s) denied.\n",
 959                                                 (long) s,
 960                                                 dnsname != NULL ? dnsname : "unknown",
 961                                                 peeraddr != NULL ? peeraddr : "unknown",
 962                                                 0, 0 );
 963                                         slapd_close(s);
 964                                         continue;
 965                                 }
 966 #endif /* HAVE_TCPD */
 967                         }
 968
 969                         if( (id = connection_init(s,
 970                                 slap_listeners[l]->sl_url,
 971                                 dnsname != NULL ? dnsname : "unknown",
 972                                 peername,
 973                                 slap_listeners[l]->sl_name,
 974 #ifdef HAVE_TLS
 975                                 slap_listeners[l]->sl_is_tls
 976 #else
 977                                 0
 978 #endif
 979                                 )) < 0 )
 980                         {
 981                                 Debug( LDAP_DEBUG_ANY,
 982                                         "daemon: connection_init(%ld, %s, %s) failed.\n",
 983                                         (long) s,
 984                                         peername,
 985                                         slap_listeners[l]->sl_name );
 986                                 slapd_close(s);
 987                                 continue;
 988                         }
 989
 990                         Statslog( LDAP_DEBUG_STATS,
 991                                 "daemon: conn=%ld fd=%ld connection from %s (%s) accepted.\n",
 992                                 id, (long) s,
 993                                 peername,
 994                                 slap_listeners[l]->sl_name,
 995                                 0 );
 996
 997                         slapd_add( s );
 998                         continue;
 999                 }
1000
1001 #ifdef LDAP_DEBUG
1002                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
1003 #ifdef HAVE_WINSOCK
1004                 for ( i = 0; i < readfds.fd_count; i++ ) {
1005                         Debug( LDAP_DEBUG_CONNS, " %d%s",
1006                                 readfds.fd_array[i], "r", 0 );
1007                 }
1008                 for ( i = 0; i < writefds.fd_count; i++ ) {
1009                         Debug( LDAP_DEBUG_CONNS, " %d%s",
1010                                 writefds.fd_array[i], "w", 0 );
1011                 }
1012 #else
1013                 for ( i = 0; i < nfds; i++ ) {
1014                         int     r, w;
1015                         int     is_listener = 0;
1016
1017                         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1018                                 if ( i == slap_listeners[l]->sl_sd ) {
1019                                         is_listener = 1;
1020                                         break;
1021                                 }
1022                         }
1023                         if ( is_listener ) {
1024                                 continue;
1025                         }
1026                         r = FD_ISSET( i, &readfds );
1027                         w = FD_ISSET( i, &writefds );
1028                         if ( r || w ) {
1029                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", i,
1030                                     r ? "r" : "", w ? "w" : "" );
1031                         }
1032                 }
1033 #endif
1034                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
1035 #endif
1036
1037                 /* loop through the writers */
1038 #ifdef HAVE_WINSOCK
1039                 for ( i = 0; i < writefds.fd_count; i++ )
1040 #else
1041                 for ( i = 0; i < nfds; i++ )
1042 #endif
1043                 {
1044                         ber_socket_t wd;
1045                         int is_listener = 0;
1046 #ifdef HAVE_WINSOCK
1047                         wd = writefds.fd_array[i];
1048 #else
1049                         if( ! FD_ISSET( i, &writefds ) ) {
1050                                 continue;
1051                         }
1052                         wd = i;
1053 #endif
1054
1055                         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1056                                 if ( i == slap_listeners[l]->sl_sd ) {
1057                                         is_listener = 1;
1058                                         break;
1059                                 }
1060                         }
1061                         if ( is_listener ) {
1062                                 continue;
1063                         }
1064                         Debug( LDAP_DEBUG_CONNS,
1065                                 "daemon: write active on %d\n",
1066                                 wd, 0, 0 );
1067
1068                         /*
1069                          * NOTE: it is possible that the connection was closed
1070                          * and that the stream is now inactive.
1071                          * connection_write() must valid the stream is still
1072                          * active.
1073                          */
1074
1075                         if ( connection_write( wd ) < 0 ) {
1076                                 FD_CLR( (unsigned) wd, &readfds );
1077                                 slapd_close( wd );
1078                         }
1079                 }
1080
1081 #ifdef HAVE_WINSOCK
1082                 for ( i = 0; i < readfds.fd_count; i++ )
1083 #else
1084                 for ( i = 0; i < nfds; i++ )
1085 #endif
1086                 {
1087                         ber_socket_t rd;
1088                         int is_listener = 0;
1089
1090 #ifdef HAVE_WINSOCK
1091                         rd = readfds.fd_array[i];
1092 #else
1093                         if( ! FD_ISSET( i, &readfds ) ) {
1094                                 continue;
1095                         }
1096                         rd = i;
1097 #endif
1098
1099                         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1100                                 if ( rd == slap_listeners[l]->sl_sd ) {
1101                                         is_listener = 1;
1102                                         break;
1103                                 }
1104                         }
1105                         if ( is_listener ) {
1106                                 continue;
1107                         }
1108
1109                         Debug ( LDAP_DEBUG_CONNS,
1110                                 "daemon: read activity on %d\n", rd, 0, 0 );
1111
1112                         /*
1113                          * NOTE: it is possible that the connection was closed
1114                          * and that the stream is now inactive.
1115                          * connection_read() must valid the stream is still
1116                          * active.
1117                          */
1118
1119                         if ( connection_read( rd ) < 0 ) {
1120                                 slapd_close( rd );
1121                         }
1122                 }
1123                 ldap_pvt_thread_yield();
1124         }
1125
1126         if( slapd_shutdown > 0 ) {
1127                 Debug( LDAP_DEBUG_TRACE,
1128                         "daemon: shutdown requested and initiated.\n",
1129                         0, 0, 0 );
1130
1131         } else if ( slapd_shutdown < 0 ) {
1132 #ifdef HAVE_NT_SERVICE_MANAGER
1133                 if (slapd_shutdown == -1)
1134                     Debug( LDAP_DEBUG_TRACE,
1135                           "daemon: shutdown initiated by Service Manager.\n",
1136                           0, 0, 0);
1137                 else
1138 #endif
1139                 Debug( LDAP_DEBUG_TRACE,
1140                         "daemon: abnormal condition, shutdown initiated.\n",
1141                         0, 0, 0 );
1142         } else {
1143                 Debug( LDAP_DEBUG_TRACE,
1144                         "daemon: no active streams, shutdown initiated.\n",
1145                         0, 0, 0 );
1146         }
1147
1148         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1149                 if ( slap_listeners[l]->sl_sd != AC_SOCKET_INVALID ) {
1150 #ifdef LDAP_PF_UNIX
1151                         if ( slap_listeners[l]->sl_sa.sa_addr.sa_family == AF_UNIX ) {
1152                                 unlink( slap_listeners[l]->sl_sa.sa_un_addr.sun_path );
1153                         }
1154 #endif /* LDAP_PF_UNIX */
1155                         slapd_close( slap_listeners[l]->sl_sd );
1156                         break;
1157                 }
1158         }
1159
1160         Debug( LDAP_DEBUG_ANY,
1161             "slapd shutdown: waiting for %d threads to terminate\n",
1162             ldap_pvt_thread_pool_backload(&connection_pool), 0, 0 );
1163
1164         ldap_pvt_thread_pool_destroy(&connection_pool, 1);
1165
1166         return NULL;
1167 }
1168
1169
1170 int slapd_daemon( void )
1171 {
1172         int rc;
1173
1174         connections_init();
1175
1176 #define SLAPD_LISTENER_THREAD 1
1177 #if defined( SLAPD_LISTENER_THREAD ) || !defined(HAVE_PTHREADS)
1178
1179         /* listener as a separate THREAD */
1180         rc = ldap_pvt_thread_create( &listener_tid,
1181                 0, slapd_daemon_task, NULL );
1182
1183         if ( rc != 0 ) {
1184                 Debug( LDAP_DEBUG_ANY,
1185                     "listener ldap_pvt_thread_create failed (%d)\n", rc, 0, 0 );
1186                 return rc;
1187         }
1188
1189         /* wait for the listener thread to complete */
1190         ldap_pvt_thread_join( listener_tid, (void *) NULL );
1191 #else
1192         /* expermimental code */
1193         listener_tid = pthread_self();
1194         slapd_daemon_task( NULL );
1195 #endif
1196
1197         return 0;
1198
1199 }
1200
1201 #ifdef HAVE_WINSOCK2
1202 int sockinit(void)
1203 {
1204     WORD wVersionRequested;
1205         WSADATA wsaData;
1206         int err;
1207
1208         wVersionRequested = MAKEWORD( 2, 0 );
1209
1210         err = WSAStartup( wVersionRequested, &wsaData );
1211         if ( err != 0 ) {
1212                 /* Tell the user that we couldn't find a usable */
1213                 /* WinSock DLL.                                  */
1214                 return -1;
1215         }
1216
1217         /* Confirm that the WinSock DLL supports 2.0.*/
1218         /* Note that if the DLL supports versions greater    */
1219         /* than 2.0 in addition to 2.0, it will still return */
1220         /* 2.0 in wVersion since that is the version we      */
1221         /* requested.                                        */
1222
1223         if ( LOBYTE( wsaData.wVersion ) != 2 ||
1224                 HIBYTE( wsaData.wVersion ) != 0 )
1225         {
1226             /* Tell the user that we couldn't find a usable */
1227             /* WinSock DLL.                                  */
1228             WSACleanup();
1229             return -1;
1230         }
1231
1232         /* The WinSock DLL is acceptable. Proceed. */
1233         return 0;
1234 }
1235
1236 int sockdestroy(void)
1237 {
1238         WSACleanup();
1239         return 0;
1240 }
1241
1242 #elif HAVE_WINSOCK
1243 static int sockinit(void)
1244 {
1245         WSADATA wsaData;
1246         if ( WSAStartup( 0x0101, &wsaData ) != 0 ) {
1247             return -1;
1248         }
1249         return 0;
1250 }
1251 static int sockdestroy(void)
1252 {
1253         WSACleanup();
1254         return 0;
1255 }
1256
1257 #else
1258 static int sockinit(void)
1259 {
1260         return 0;
1261 }
1262 static int sockdestroy(void)
1263 {
1264         return 0;
1265 }
1266 #endif
1267
1268 RETSIGTYPE
1269 slap_sig_shutdown( int sig )
1270 {
1271         Debug(LDAP_DEBUG_TRACE, "slap_sig_shutdown: signal %d\n", sig, 0, 0);
1272
1273         /*
1274          * If the NT Service Manager is controlling the server, we don't
1275          * want SIGBREAK to kill the server. For some strange reason,
1276          * SIGBREAK is generated when a user logs out.
1277          */
1278
1279 #if HAVE_NT_SERVICE_MANAGER && SIGBREAK
1280         if (is_NT_Service && sig == SIGBREAK)
1281             Debug(LDAP_DEBUG_TRACE, "slap_sig_shutdown: SIGBREAK ignored.\n",
1282                   0, 0, 0);
1283         else
1284 #endif
1285         slapd_shutdown = sig;
1286
1287         WAKE_LISTENER(1);
1288
1289         /* reinstall self */
1290         (void) SIGNAL( sig, slap_sig_shutdown );
1291 }
1292
1293 RETSIGTYPE
1294 slap_sig_wake( int sig )
1295 {
1296         WAKE_LISTENER(1);
1297
1298         /* reinstall self */
1299         (void) SIGNAL( sig, slap_sig_wake );
1300 }