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

   1 #include "portable.h"
   2
   3 #include <stdio.h>
   4
   5 #include <ac/ctype.h>
   6 #include <ac/errno.h>
   7 #include <ac/signal.h>
   8 #include <ac/socket.h>
   9 #include <ac/string.h>
  10 #include <ac/time.h>
  11 #include <ac/unistd.h>
  12
  13 #include "ldapconfig.h"
  14 #include "slap.h"
  15
  16 #ifdef HAVE_TCPD
  17 #include <tcpd.h>
  18
  19 int allow_severity = LOG_INFO;
  20 int deny_severity = LOG_NOTICE;
  21 #endif /* TCP Wrappers */
  22
  23 /* globals */
  24 int dtblsize;
  25
  26 #ifdef HAVE_WINSOCK2
  27 /* forward reference */
  28 void hit_socket();
  29 /* In wsa_err.c */
  30 char *WSAGetLastErrorString();
  31
  32 #define WAKE_LISTENER \
  33 do {\
  34     if( wake ) {\
  35         ldap_pvt_thread_kill( listener_tid, LDAP_SIGUSR1 );\
  36         hit_socket();\
  37     }\
  38 } while(0)
  39 #else
  40 #define WAKE_LISTENER \
  41 do {\
  42     if( wake ) {\
  43         ldap_pvt_thread_kill( listener_tid, LDAP_SIGUSR1 );\
  44     }\
  45 } while(0)
  46 #endif
  47
  48 static int daemon_initialized = 0;
  49 static ldap_pvt_thread_t        listener_tid;
  50 static volatile sig_atomic_t slapd_shutdown = 0;
  51 static volatile sig_atomic_t slapd_listener = 0;
  52 void sockinit();
  53
  54 struct slap_daemon {
  55         ldap_pvt_thread_mutex_t sd_mutex;
  56
  57         int sd_nactives;
  58
  59 #ifndef HAVE_WINSOCK
  60         /* In winsock, accept() returns values higher than dtblsize
  61                 so don't bother with this optimization */
  62         int sd_nfds;
  63 #endif
  64
  65         fd_set sd_actives;
  66         fd_set sd_readers;
  67         fd_set sd_writers;
  68 } slap_daemon;
  69
  70 /*
  71  * Add a descriptor to daemon control
  72  */
  73 static void slapd_add(int s) {
  74         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
  75
  76         assert( !FD_ISSET( s, &slap_daemon.sd_actives ));
  77         assert( !FD_ISSET( s, &slap_daemon.sd_readers ));
  78         assert( !FD_ISSET( s, &slap_daemon.sd_writers ));
  79
  80 #ifndef HAVE_WINSOCK
  81         if (s >= slap_daemon.sd_nfds) {
  82                 slap_daemon.sd_nfds = s + 1;
  83         }
  84 #endif
  85
  86         FD_SET( (unsigned) s, &slap_daemon.sd_actives );
  87         FD_SET( (unsigned) s, &slap_daemon.sd_readers );
  88
  89         Debug( LDAP_DEBUG_CONNS, "daemon: added %d%s%s\n", s,
  90             FD_ISSET(s, &slap_daemon.sd_readers) ? "r" : "",
  91                 FD_ISSET(s, &slap_daemon.sd_writers) ? "w" : "" );
  92
  93         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
  94 }
  95
  96 /*
  97  * Remove the descriptor from daemon control
  98  */
  99 void slapd_remove(int s) {
 100         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 101
 102         assert( FD_ISSET( s, &slap_daemon.sd_actives ));
 103
 104         Debug( LDAP_DEBUG_CONNS, "daemon: removing %d%s%s\n", s,
 105             FD_ISSET(s, &slap_daemon.sd_readers) ? "r" : "",
 106                 FD_ISSET(s, &slap_daemon.sd_writers) ? "w" : "" );
 107
 108         FD_CLR( (unsigned) s, &slap_daemon.sd_actives );
 109         FD_CLR( (unsigned) s, &slap_daemon.sd_readers );
 110         FD_CLR( (unsigned) s, &slap_daemon.sd_writers );
 111
 112         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 113 }
 114
 115 void slapd_clr_write(int s, int wake) {
 116         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 117         WAKE_LISTENER;
 118
 119         assert( FD_ISSET( (unsigned) s, &slap_daemon.sd_actives) );
 120         FD_CLR( (unsigned) s, &slap_daemon.sd_writers );
 121
 122         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 123 }
 124
 125 void slapd_set_write(int s, int wake) {
 126         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 127     WAKE_LISTENER;
 128
 129
 130         assert( FD_ISSET( s, &slap_daemon.sd_actives) );
 131         FD_SET( (unsigned) s, &slap_daemon.sd_writers );
 132
 133         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 134 }
 135
 136 void slapd_clr_read(int s, int wake) {
 137         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 138     WAKE_LISTENER;
 139
 140         assert( FD_ISSET( s, &slap_daemon.sd_actives) );
 141         FD_CLR( (unsigned) s, &slap_daemon.sd_readers );
 142
 143         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 144
 145 }
 146
 147 void slapd_set_read(int s, int wake) {
 148         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 149     WAKE_LISTENER;
 150
 151         assert( FD_ISSET( s, &slap_daemon.sd_actives) );
 152         FD_SET( (unsigned) s, &slap_daemon.sd_readers );
 153
 154         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 155 }
 156
 157 static void slapd_close(int s) {
 158         slapd_remove(s);
 159
 160         Debug( LDAP_DEBUG_CONNS, "daemon: closing %d\n", s, 0, 0 );
 161         tcp_close(s);
 162 }
 163
 164 int
 165 set_socket( struct sockaddr_in *addr )
 166 {
 167         int     tcps = -1;
 168     if ( !daemon_initialized ) sockinit();
 169
 170 #ifdef HAVE_SYSCONF
 171         dtblsize = sysconf( _SC_OPEN_MAX );
 172 #elif HAVE_GETDTABLESIZE
 173         dtblsize = getdtablesize();
 174 #else
 175         dtblsize = FD_SETSIZE;
 176 #endif
 177
 178 #ifdef FD_SETSIZE
 179         if(dtblsize > FD_SETSIZE) {
 180                 dtblsize = FD_SETSIZE;
 181         }
 182 #endif  /* !FD_SETSIZE */
 183
 184         if( addr != NULL ) {
 185                 int     tmp;
 186
 187                 if ( (tcps = socket( AF_INET, SOCK_STREAM, 0 )) == -1 ) {
 188 #ifndef HAVE_WINSOCK
 189                         int err = errno;
 190                         Debug( LDAP_DEBUG_ANY,
 191                                 "daemon: socket() failed errno %d (%s)\n", err,
 192                         err > -1 && err < sys_nerr ? sys_errlist[err] :
 193                         "unknown", 0 );
 194 #else
 195                         Debug( LDAP_DEBUG_ANY,
 196                                 "daemon: socket() failed errno %d (%s)\n",
 197                                 WSAGetLastError(),
 198                         WSAGetLastErrorString(), 0 );
 199 #endif
 200                         exit( 1 );
 201                 }
 202
 203 #ifndef HAVE_WINSOCK
 204                 if ( tcps >= dtblsize ) {
 205                         Debug( LDAP_DEBUG_ANY,
 206                                 "daemon: listener descriptor %d is too great\n",
 207                                 tcps, dtblsize, 0 );
 208                         exit( 1 );
 209                 }
 210 #endif
 211
 212 #ifdef SO_REUSEADDR
 213                 tmp = 1;
 214                 if ( setsockopt( tcps, SOL_SOCKET, SO_REUSEADDR,
 215                         (char *) &tmp, sizeof(tmp) ) == -1 )
 216                 {
 217                         int err = errno;
 218                         Debug( LDAP_DEBUG_ANY,
 219                                "slapd(%d): setsockopt() failed errno %d (%s)\n",
 220                         tcps, err,
 221                                 err > -1 && err < sys_nerr
 222                                         ? sys_errlist[err] : "unknown" );
 223                 }
 224 #endif
 225 #ifdef SO_KEEPALIVE
 226                 tmp = 1;
 227                 if ( setsockopt( tcps, SOL_SOCKET, SO_KEEPALIVE,
 228                         (char *) &tmp, sizeof(tmp) ) == -1 )
 229                 {
 230                         int err = errno;
 231                         Debug( LDAP_DEBUG_ANY,
 232                                 "slapd(%d): setsockopt(KEEPALIVE) failed errno %d (%s)\n",
 233                         tcps, err,
 234                                 err > -1 && err < sys_nerr
 235                                         ? sys_errlist[err] : "unknown" );
 236                 }
 237 #endif
 238
 239
 240                 if ( bind( tcps, (struct sockaddr *) addr, sizeof(*addr) ) == -1 ) {
 241                         int err = errno;
 242                         Debug( LDAP_DEBUG_ANY, "daemon: bind(%d) failed errno %d (%s)\n",
 243                         tcps, err,
 244                                 err > -1 && err < sys_nerr
 245                                         ? sys_errlist[err] : "unknown" );
 246                         exit( 1 );
 247                 }
 248         }
 249
 250         return tcps;
 251 }
 252
 253 static void *
 254 slapd_daemon_task(
 255         void *ptr
 256 )
 257 {
 258         int inetd = ((int *)ptr) [0];
 259         int tcps  = ((int *)ptr) [1];
 260         free( ptr );
 261
 262     if ( !daemon_initialized ) sockinit();
 263
 264         slapd_listener=1;
 265
 266         ldap_pvt_thread_mutex_init( &slap_daemon.sd_mutex );
 267         FD_ZERO( &slap_daemon.sd_readers );
 268         FD_ZERO( &slap_daemon.sd_writers );
 269
 270         if( !inetd ) {
 271                 if ( listen( tcps, 5 ) == -1 ) {
 272                         int err = errno;
 273                         Debug( LDAP_DEBUG_ANY,
 274                                 "daemon: listen(%d, 5) failed errno %d (%s)\n",
 275                             tcps, err,
 276                                 err > -1 && err < sys_nerr
 277                                         ? sys_errlist[err] : "unknown" );
 278                         exit( 1 );
 279                 }
 280
 281                 slapd_add( tcps );
 282
 283         } else {
 284                 if( connection_init( 0, NULL, NULL ) ) {
 285                         Debug( LDAP_DEBUG_ANY,
 286                                 "connection_init(%d) failed.\n",
 287                                 0, 0, 0 );
 288
 289                         exit( 1 );
 290                 }
 291
 292                 slapd_add( 0 );
 293         }
 294
 295         while ( !slapd_shutdown ) {
 296                 unsigned int i;
 297                 int ns, nfds;
 298
 299                 fd_set                  readfds;
 300                 fd_set                  writefds;
 301
 302                 struct sockaddr_in      from;
 303 #if defined(SLAPD_RLOOKUPS) || defined(HAVE_TCPD)
 304         struct hostent          *hp;
 305 #endif
 306         struct timeval          zero;
 307                 struct timeval          *tvp;
 308
 309                 char    *client_name;
 310                 char    *client_addr;
 311
 312                 FD_ZERO( &writefds );
 313                 FD_ZERO( &readfds );
 314
 315                 zero.tv_sec = 0;
 316                 zero.tv_usec = 0;
 317
 318                 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 319
 320 #ifdef FD_SET_MANUAL_COPY
 321                 for( s = 0; s < nfds; s++ ) {
 322                         if(FD_ISSET( &slap_sd_writers, s )) {
 323                                 FD_SET( &writefds, s );
 324                         }
 325                         if(FD_ISSET( &slap_sd_writers, s )) {
 326                                 FD_SET( &writefds, s );
 327                         }
 328                 }
 329 #else
 330                 memcpy( &readfds, &slap_daemon.sd_readers, sizeof(fd_set) );
 331                 memcpy( &writefds, &slap_daemon.sd_writers, sizeof(fd_set) );
 332 #endif
 333
 334                 FD_SET( (unsigned) tcps, &readfds );
 335
 336 #ifndef HAVE_WINSOCK
 337                 nfds = slap_daemon.sd_nfds;
 338 #else
 339                 nfds = dtblsize;
 340 #endif
 341
 342                 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 343
 344                 ldap_pvt_thread_mutex_lock( &active_threads_mutex );
 345 #if defined( HAVE_YIELDING_SELECT ) || defined( NO_THREADS )
 346                 tvp = NULL;
 347 #else
 348                 tvp = active_threads ? &zero : NULL;
 349 #endif
 350
 351                 Debug( LDAP_DEBUG_CONNS,
 352                         "daemon: select: tcps=%d active_threads=%d tvp=%s\n",
 353                     tcps, active_threads,
 354                         tvp == NULL ? "NULL" : "zero" );
 355
 356
 357                 ldap_pvt_thread_mutex_unlock( &active_threads_mutex );
 358
 359                 switch(ns = select( nfds, &readfds, &writefds, 0, tvp )) {
 360                 case -1: {      /* failure - try again */
 361                                 int err = errno;
 362                                 if( err != EINTR ) {
 363                                         Debug( LDAP_DEBUG_CONNS,
 364                                                 "daemon: select failed (%d): %s\n",
 365                                                 err,
 366                                                 err >= 0 && err < sys_nerr
 367                                                         ? sys_errlist[err] : "unknown",
 368                                                 0 );
 369
 370                                         slapd_shutdown = -1;
 371                                 }
 372                         }
 373                         continue;
 374
 375                 case 0:         /* timeout - let threads run */
 376                         Debug( LDAP_DEBUG_CONNS, "daemon: select timeout - yielding\n",
 377                             0, 0, 0 );
 378                 ldap_pvt_thread_yield();
 379                         continue;
 380
 381                 default:        /* something happened - deal with it */
 382                         Debug( LDAP_DEBUG_CONNS, "daemon: activity on %d descriptors\n",
 383                                 ns, 0, 0 );
 384                         /* FALL THRU */
 385                 }
 386
 387                 if ( FD_ISSET( tcps, &readfds ) ) {
 388                         int s;
 389                         int len = sizeof(from);
 390                         long id;
 391
 392                         if ( (s = accept( tcps,
 393                                 (struct sockaddr *) &from, &len )) == -1 )
 394                         {
 395                                 int err = errno;
 396                                 Debug( LDAP_DEBUG_ANY,
 397                                     "daemon: accept(%d) failed errno %d (%s)\n", err,
 398                                     tcps, err >= 0 && err < sys_nerr ?
 399                                     sys_errlist[err] : "unknown");
 400                                 continue;
 401                         }
 402
 403 #ifdef LDAP_DEBUG
 404                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 405
 406                         /* newly accepted stream should not be in any of the FD SETS */
 407
 408                         assert( !FD_ISSET( s, &slap_daemon.sd_actives) );
 409                         assert( !FD_ISSET( s, &slap_daemon.sd_readers) );
 410                         assert( !FD_ISSET( s, &slap_daemon.sd_writers) );
 411
 412                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 413 #endif
 414
 415 #ifndef HAVE_WINSOCK
 416                         /* make sure descriptor number isn't too great */
 417                         if ( s >= dtblsize ) {
 418                                 Debug( LDAP_DEBUG_ANY,
 419                                         "daemon: %d beyond descriptor table size %d\n",
 420                                         s, dtblsize, 0 );
 421                                 tcp_close(s);
 422                                 continue;
 423                         }
 424 #endif
 425
 426                         Debug( LDAP_DEBUG_CONNS, "daemon: new connection on %d\n",
 427                                 s, 0, 0 );
 428
 429                         len = sizeof(from);
 430                         if ( getpeername( s, (struct sockaddr *) &from, &len ) == 0 ) {
 431                                 client_addr = inet_ntoa( from.sin_addr );
 432
 433 #if defined(SLAPD_RLOOKUPS) || defined(HAVE_TCPD)
 434                                 hp = gethostbyaddr( (char *)
 435                                     &(from.sin_addr.s_addr),
 436                                     sizeof(from.sin_addr.s_addr), AF_INET );
 437
 438                                 if(hp) {
 439                                         char *p;
 440                                         client_name = hp->h_name;
 441
 442                                         /* normalize the domain */
 443                                         for ( p = client_name; *p; p++ ) {
 444                                                 *p = TOLOWER( (unsigned char) *p );
 445                                         }
 446
 447                                 } else {
 448                                         client_name = NULL;
 449                                 }
 450 #else
 451                                 client_name = NULL;
 452 #endif
 453
 454                         } else {
 455                                 client_name = NULL;;
 456                                 client_addr = NULL;
 457                         }
 458
 459 #ifdef HAVE_TCPD
 460                         if(!hosts_ctl("slapd",
 461                                 client_name != NULL ? client_name : STRING_UNKNOWN,
 462                                 client_addr != NULL ? client_addr : STRING_UNKNOWN,
 463                                 STRING_UNKNOWN))
 464                         {
 465                                 /* DENY ACCESS */
 466                                 Statslog( LDAP_DEBUG_ANY,
 467                                  "fd=%d connection from %s (%s) denied.\n",
 468                                         s,
 469                                         client_name == NULL ? "unknown" : client_name,
 470                                         client_addr == NULL ? "unknown" : client_addr,
 471                                   0, 0 );
 472
 473                                 tcp_close(s);
 474                                 continue;
 475                         }
 476 #endif /* HAVE_TCPD */
 477
 478
 479                         if( (id = connection_init(s, client_name, client_addr)) < 0 ) {
 480                                 Debug( LDAP_DEBUG_ANY,
 481                                         "daemon: connection_init(%d, %s, %s) failed.\n",
 482                                         s,
 483                                         client_name == NULL ? "unknown" : client_name,
 484                                         client_addr == NULL ? "unknown" : client_addr);
 485                                 tcp_close(s);
 486                                 continue;
 487                         }
 488
 489                         Statslog( LDAP_DEBUG_STATS,
 490                                 "daemon: conn=%d fd=%d connection from %s (%s) accepted.\n",
 491                                 id, s,
 492                                 client_name == NULL ? "unknown" : client_name,
 493                                 client_addr == NULL ? "unknown" : client_addr,
 494                                 0 );
 495
 496                         slapd_add( s );
 497                         continue;
 498                 }
 499
 500 #ifdef LDAP_DEBUG
 501                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
 502 #ifdef HAVE_WINSOCK
 503                 for ( i = 0; i < readfds.fd_count; i++ ) {
 504                         Debug( LDAP_DEBUG_CONNS, " %d%s", readfds.fd_array[i], "r" );
 505                 }
 506                 for ( i = 0; i < writefds.fd_count; i++ ) {
 507                         Debug( LDAP_DEBUG_CONNS, " %d%s", writefds.fd_array[i], "w" );
 508                 }
 509 #else
 510                 for ( i = 0; i < nfds; i++ ) {
 511                         int     a, r, w;
 512
 513                         r = FD_ISSET( i, &readfds );
 514                         w = FD_ISSET( i, &writefds );
 515                         if ( i != tcps && (r || w) ) {
 516                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", i,
 517                                     r ? "r" : "", w ? "w" : "" );
 518                         }
 519                 }
 520 #endif
 521                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
 522 #endif
 523
 524                 /* loop through the writers */
 525 #ifdef HAVE_WINSOCK
 526                 for ( i = 0; i < writefds.fd_count; i++ ) {
 527                         int wd = writefds.fd_array[i];
 528
 529                         if ( wd == tcps ) {
 530                                 continue;
 531                         }
 532
 533                         Debug( LDAP_DEBUG_CONNS,
 534                                 "daemon: signalling write waiter on %d\n",
 535                                 wd, 0, 0 );
 536
 537                         slapd_clr_write( wd, 0 );
 538                         if ( connection_write( wd ) < 0 ) {
 539                                 FD_CLR( (unsigned) wd, &readfds );
 540                                 slapd_close( wd );
 541                         }
 542                 }
 543 #else
 544                 for ( i = 0; i < nfds; i++ ) {
 545                         if ( i == tcps ) {
 546                                 continue;
 547                         }
 548                         if ( FD_ISSET( i, &writefds ) ) {
 549                                 Debug( LDAP_DEBUG_CONNS,
 550                                     "daemon: signaling write waiter on %d\n", i, 0, 0 );
 551
 552                                 /* clear the write flag */
 553                                 slapd_clr_write( i, 0 );
 554
 555                                 if( connection_write( i ) < 0 ) {
 556                                         FD_CLR( i, &readfds );
 557                                         slapd_close( i );
 558                                 }
 559                         }
 560                 }
 561 #endif
 562
 563 #ifdef HAVE_WINSOCK
 564                 for ( i = 0; i < readfds.fd_count; i++ ) {
 565                         int rd = readfds.fd_array[i];
 566                         if ( rd == tcps ) {
 567                                 continue;
 568                         }
 569                         Debug ( LDAP_DEBUG_CONNS,
 570                                 "daemon: read activity on %d\n", rd, 0, 0 );
 571
 572                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 573                         assert( FD_ISSET( rd, &slap_daemon.sd_actives) );
 574                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 575
 576                         if ( connection_read( rd ) < 0 ) {
 577                                 slapd_close( rd );
 578                         }
 579                 }
 580 #else
 581                 for ( i = 0; i < nfds; i++ ) {
 582                         if ( i == tcps ) {
 583                                 continue;
 584                         }
 585
 586                         if ( FD_ISSET( i, &readfds ) ) {
 587                                 Debug( LDAP_DEBUG_CONNS,
 588                                     "daemon: read activity on %d\n", i, 0, 0 );
 589
 590                                 assert( FD_ISSET( i, &slap_daemon.sd_actives) );
 591
 592                                 if( connection_read( i ) < 0) {
 593                                         slapd_close( i );
 594                                 }
 595                         }
 596                 }
 597 #endif
 598                 ldap_pvt_thread_yield();
 599         }
 600
 601         if( slapd_shutdown > 0 ) {
 602                 Debug( LDAP_DEBUG_TRACE,
 603                         "daemon: shutdown requested (%d) and initiated.\n",
 604                         (int) slapd_shutdown, 0, 0 );
 605
 606         } else if ( slapd_shutdown < 0 ) {
 607                 Debug( LDAP_DEBUG_TRACE,
 608                         "daemon: abnormal condition (%d), shutdown initiated.\n",
 609                         (int) slapd_shutdown, 0, 0 );
 610         } else {
 611                 Debug( LDAP_DEBUG_TRACE,
 612                         "daemon: no active streams, shutdown initiated.\n",
 613                         0, 0, 0 );
 614         }
 615
 616         if( tcps >= 0 ) {
 617                 tcp_close( tcps );
 618         }
 619
 620         /* we only implement "quick" shutdown */
 621         connections_shutdown();
 622
 623         ldap_pvt_thread_mutex_lock( &active_threads_mutex );
 624         Debug( LDAP_DEBUG_ANY,
 625             "slapd shutdown: waiting for %d threads to terminate\n",
 626             active_threads, 0, 0 );
 627         while ( active_threads > 0 ) {
 628                 ldap_pvt_thread_cond_wait(&active_threads_cond, &active_threads_mutex);
 629         }
 630         ldap_pvt_thread_mutex_unlock( &active_threads_mutex );
 631
 632         slapd_listener = 0;
 633         return NULL;
 634 }
 635
 636 int slapd_daemon( int inetd, int tcps )
 637 {
 638         int rc;
 639         int *args = ch_malloc( sizeof( int[2] ) );
 640         args[0] = inetd;
 641         args[1] = tcps;
 642
 643     if ( !daemon_initialized ) sockinit();
 644
 645         connections_init();
 646
 647 #define SLAPD_LISTENER_THREAD 1
 648 #if defined( SLAPD_LISTENER_THREAD ) || !defined(HAVE_PTHREADS)
 649
 650         /* listener as a separate THREAD */
 651         rc = ldap_pvt_thread_create( &listener_tid,
 652                 0, slapd_daemon_task, args );
 653
 654         if ( rc != 0 ) {
 655                 Debug( LDAP_DEBUG_ANY,
 656                     "listener ldap_pvt_thread_create failed (%d)\n", rc, 0, 0 );
 657                 goto destory;
 658         }
 659
 660         /* wait for the listener thread to complete */
 661         ldap_pvt_thread_join( listener_tid, (void *) NULL );
 662 #else
 663         /* expermimental code */
 664         listener_tid = pthread_self();
 665         slapd_daemon_task( args );
 666 #endif
 667
 668         rc = 0;
 669
 670 destory:
 671         connections_destroy();
 672
 673 #ifdef HAVE_WINSOCK
 674     WSACleanup( );
 675 #endif
 676
 677         return rc;
 678 }
 679
 680 #ifdef HAVE_WINSOCK2
 681 void sockinit()
 682 {
 683     WORD wVersionRequested;
 684         WSADATA wsaData;
 685         int err;
 686
 687         wVersionRequested = MAKEWORD( 2, 0 );
 688
 689         err = WSAStartup( wVersionRequested, &wsaData );
 690         if ( err != 0 ) {
 691                 /* Tell the user that we couldn't find a usable */
 692                 /* WinSock DLL.                                  */
 693                 return;
 694         }
 695
 696         /* Confirm that the WinSock DLL supports 2.0.*/
 697         /* Note that if the DLL supports versions greater    */
 698         /* than 2.0 in addition to 2.0, it will still return */
 699         /* 2.0 in wVersion since that is the version we      */
 700         /* requested.                                        */
 701
 702         if ( LOBYTE( wsaData.wVersion ) != 2 ||
 703                 HIBYTE( wsaData.wVersion ) != 0 )
 704         {
 705             /* Tell the user that we couldn't find a usable */
 706             /* WinSock DLL.                                  */
 707             WSACleanup( );
 708             return;
 709         }
 710     daemon_initialized = 1;
 711 }       /* The WinSock DLL is acceptable. Proceed. */
 712
 713 void hit_socket( void )
 714 {
 715         int s, on = 1;
 716         extern struct sockaddr_in       bind_addr;
 717
 718         /* throw something at the socket to terminate the select() in the daemon thread. */
 719         if (( s = socket( AF_INET, SOCK_STREAM, 0 )) == INVALID_SOCKET )
 720                 Debug( LDAP_DEBUG_TRACE,
 721                         "slap_set_shutdown: socket failed\n\tWSAGetLastError=%d (%s)\n",
 722                         WSAGetLastError(), WSAGetLastErrorString(), 0 );
 723
 724         if ( ioctlsocket( s, FIONBIO, &on ) == -1 )
 725                 Debug( LDAP_DEBUG_TRACE,
 726                         "slap_set_shutdown:FIONBIO ioctl on %d faled\n\tWSAGetLastError=%d (%s)\n",
 727                         s, WSAGetLastError(), WSAGetLastError() );
 728
 729         bind_addr.sin_addr.s_addr = htonl( INADDR_LOOPBACK );
 730
 731         if ( connect( s, (struct sockaddr *)&bind_addr, sizeof( struct sockaddr_in )) == SOCKET_ERROR ) {
 732                 /* we can probably expect some error to occur here, mostly WSAEWOULDBLOCK */
 733         }
 734
 735         tcp_close(s);
 736 }
 737
 738 #elif HAVE_WINSOCK
 739 void sockinit()
 740 {       WSADATA wsaData;
 741         if ( WSAStartup( 0x0101, &wsaData ) != 0 ) {
 742             return( NULL );
 743         }
 744     daemon_initialized = 1;
 745 }
 746 #else
 747 void sockinit()
 748 {
 749     daemon_initialized = 1;
 750     return;
 751 }
 752 #endif
 753
 754 void
 755 slap_set_shutdown( int sig )
 756 {
 757         slapd_shutdown = sig;
 758 #ifndef HAVE_WINSOCK
 759         if(slapd_listener) {
 760                 ldap_pvt_thread_kill( listener_tid, LDAP_SIGUSR1 );
 761         }
 762 #else
 763         hit_socket();
 764 #endif
 765         /* reinstall self */
 766         (void) SIGNAL( sig, slap_set_shutdown );
 767 }
 768
 769 void
 770 slap_do_nothing( int sig )
 771 {
 772         /* reinstall self */
 773         (void) SIGNAL( sig, slap_do_nothing );
 774 }