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                 int ebadf = 0;
 299 #define SLAPD_EBADF_LIMIT 10
 300
 301                 fd_set                  readfds;
 302                 fd_set                  writefds;
 303
 304                 struct sockaddr_in      from;
 305 #if defined(SLAPD_RLOOKUPS) || defined(HAVE_TCPD)
 306         struct hostent          *hp;
 307 #endif
 308         struct timeval          zero;
 309                 struct timeval          *tvp;
 310
 311                 char    *client_name;
 312                 char    *client_addr;
 313
 314                 FD_ZERO( &writefds );
 315                 FD_ZERO( &readfds );
 316
 317                 zero.tv_sec = 0;
 318                 zero.tv_usec = 0;
 319
 320                 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 321
 322 #ifdef FD_SET_MANUAL_COPY
 323                 for( s = 0; s < nfds; s++ ) {
 324                         if(FD_ISSET( &slap_sd_writers, s )) {
 325                                 FD_SET( &writefds, s );
 326                         }
 327                         if(FD_ISSET( &slap_sd_writers, s )) {
 328                                 FD_SET( &writefds, s );
 329                         }
 330                 }
 331 #else
 332                 memcpy( &readfds, &slap_daemon.sd_readers, sizeof(fd_set) );
 333                 memcpy( &writefds, &slap_daemon.sd_writers, sizeof(fd_set) );
 334 #endif
 335
 336                 FD_SET( (unsigned) tcps, &readfds );
 337
 338 #ifndef HAVE_WINSOCK
 339                 nfds = slap_daemon.sd_nfds;
 340 #else
 341                 nfds = dtblsize;
 342 #endif
 343
 344                 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 345
 346                 ldap_pvt_thread_mutex_lock( &active_threads_mutex );
 347 #if defined( HAVE_YIELDING_SELECT ) || defined( NO_THREADS )
 348                 tvp = NULL;
 349 #else
 350                 tvp = active_threads ? &zero : NULL;
 351 #endif
 352
 353                 Debug( LDAP_DEBUG_CONNS,
 354                         "daemon: select: tcps=%d active_threads=%d tvp=%s\n",
 355                     tcps, active_threads,
 356                         tvp == NULL ? "NULL" : "zero" );
 357
 358
 359                 ldap_pvt_thread_mutex_unlock( &active_threads_mutex );
 360
 361                 switch(ns = select( nfds, &readfds, &writefds, 0, tvp )) {
 362                 case -1: {      /* failure - try again */
 363                                 int err = errno;
 364
 365                                 if( err == EBADF && ++ebadf < SLAPD_EBADF_LIMIT) {
 366                                         continue;
 367                                 }
 368
 369                                 if( err != EINTR ) {
 370                                         Debug( LDAP_DEBUG_CONNS,
 371                                                 "daemon: select failed (%d): %s\n",
 372                                                 err,
 373                                                 err >= 0 && err < sys_nerr
 374                                                         ? sys_errlist[err] : "unknown",
 375                                                 0 );
 376
 377                                         slapd_shutdown = -1;
 378                                 }
 379                         }
 380                         continue;
 381
 382                 case 0:         /* timeout - let threads run */
 383                         ebadf = 0;
 384                         Debug( LDAP_DEBUG_CONNS, "daemon: select timeout - yielding\n",
 385                             0, 0, 0 );
 386                 ldap_pvt_thread_yield();
 387                         continue;
 388
 389                 default:        /* something happened - deal with it */
 390                         ebadf = 0;
 391                         Debug( LDAP_DEBUG_CONNS, "daemon: activity on %d descriptors\n",
 392                                 ns, 0, 0 );
 393                         /* FALL THRU */
 394                 }
 395
 396                 if ( FD_ISSET( tcps, &readfds ) ) {
 397                         int s;
 398                         int len = sizeof(from);
 399                         long id;
 400
 401                         if ( (s = accept( tcps,
 402                                 (struct sockaddr *) &from, &len )) == -1 )
 403                         {
 404                                 int err = errno;
 405                                 Debug( LDAP_DEBUG_ANY,
 406                                     "daemon: accept(%d) failed errno %d (%s)\n", err,
 407                                     tcps, err >= 0 && err < sys_nerr ?
 408                                     sys_errlist[err] : "unknown");
 409                                 continue;
 410                         }
 411
 412 #ifdef LDAP_DEBUG
 413                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 414
 415                         /* newly accepted stream should not be in any of the FD SETS */
 416
 417                         assert( !FD_ISSET( s, &slap_daemon.sd_actives) );
 418                         assert( !FD_ISSET( s, &slap_daemon.sd_readers) );
 419                         assert( !FD_ISSET( s, &slap_daemon.sd_writers) );
 420
 421                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 422 #endif
 423
 424 #ifndef HAVE_WINSOCK
 425                         /* make sure descriptor number isn't too great */
 426                         if ( s >= dtblsize ) {
 427                                 Debug( LDAP_DEBUG_ANY,
 428                                         "daemon: %d beyond descriptor table size %d\n",
 429                                         s, dtblsize, 0 );
 430                                 tcp_close(s);
 431                                 continue;
 432                         }
 433 #endif
 434
 435                         Debug( LDAP_DEBUG_CONNS, "daemon: new connection on %d\n",
 436                                 s, 0, 0 );
 437
 438                         len = sizeof(from);
 439                         if ( getpeername( s, (struct sockaddr *) &from, &len ) == 0 ) {
 440                                 client_addr = inet_ntoa( from.sin_addr );
 441
 442 #if defined(SLAPD_RLOOKUPS) || defined(HAVE_TCPD)
 443                                 hp = gethostbyaddr( (char *)
 444                                     &(from.sin_addr.s_addr),
 445                                     sizeof(from.sin_addr.s_addr), AF_INET );
 446
 447                                 if(hp) {
 448                                         char *p;
 449                                         client_name = hp->h_name;
 450
 451                                         /* normalize the domain */
 452                                         for ( p = client_name; *p; p++ ) {
 453                                                 *p = TOLOWER( (unsigned char) *p );
 454                                         }
 455
 456                                 } else {
 457                                         client_name = NULL;
 458                                 }
 459 #else
 460                                 client_name = NULL;
 461 #endif
 462
 463                         } else {
 464                                 client_name = NULL;;
 465                                 client_addr = NULL;
 466                         }
 467
 468 #ifdef HAVE_TCPD
 469                         if(!hosts_ctl("slapd",
 470                                 client_name != NULL ? client_name : STRING_UNKNOWN,
 471                                 client_addr != NULL ? client_addr : STRING_UNKNOWN,
 472                                 STRING_UNKNOWN))
 473                         {
 474                                 /* DENY ACCESS */
 475                                 Statslog( LDAP_DEBUG_ANY,
 476                                  "fd=%d connection from %s (%s) denied.\n",
 477                                         s,
 478                                         client_name == NULL ? "unknown" : client_name,
 479                                         client_addr == NULL ? "unknown" : client_addr,
 480                                   0, 0 );
 481
 482                                 tcp_close(s);
 483                                 continue;
 484                         }
 485 #endif /* HAVE_TCPD */
 486
 487
 488                         if( (id = connection_init(s, client_name, client_addr)) < 0 ) {
 489                                 Debug( LDAP_DEBUG_ANY,
 490                                         "daemon: connection_init(%d, %s, %s) failed.\n",
 491                                         s,
 492                                         client_name == NULL ? "unknown" : client_name,
 493                                         client_addr == NULL ? "unknown" : client_addr);
 494                                 tcp_close(s);
 495                                 continue;
 496                         }
 497
 498                         Statslog( LDAP_DEBUG_STATS,
 499                                 "daemon: conn=%d fd=%d connection from %s (%s) accepted.\n",
 500                                 id, s,
 501                                 client_name == NULL ? "unknown" : client_name,
 502                                 client_addr == NULL ? "unknown" : client_addr,
 503                                 0 );
 504
 505                         slapd_add( s );
 506                         continue;
 507                 }
 508
 509 #ifdef LDAP_DEBUG
 510                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
 511 #ifdef HAVE_WINSOCK
 512                 for ( i = 0; i < readfds.fd_count; i++ ) {
 513                         Debug( LDAP_DEBUG_CONNS, " %d%s", readfds.fd_array[i], "r" );
 514                 }
 515                 for ( i = 0; i < writefds.fd_count; i++ ) {
 516                         Debug( LDAP_DEBUG_CONNS, " %d%s", writefds.fd_array[i], "w" );
 517                 }
 518 #else
 519                 for ( i = 0; i < nfds; i++ ) {
 520                         int     a, r, w;
 521
 522                         r = FD_ISSET( i, &readfds );
 523                         w = FD_ISSET( i, &writefds );
 524                         if ( i != tcps && (r || w) ) {
 525                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", i,
 526                                     r ? "r" : "", w ? "w" : "" );
 527                         }
 528                 }
 529 #endif
 530                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
 531 #endif
 532
 533                 /* loop through the writers */
 534 #ifdef HAVE_WINSOCK
 535                 for ( i = 0; i < writefds.fd_count; i++ )
 536 #else
 537                 for ( i = 0; i < nfds; i++ )
 538 #endif
 539                 {
 540                         int wd, active;
 541
 542 #ifdef HAVE_WINSOCK
 543                         wd = writefds.fd_array[i];
 544 #else
 545                         if( ! FD_ISSET( i, &writefds ) ) {
 546                                 continue;
 547                         }
 548                         wd = i;
 549 #endif
 550
 551                         if ( wd == tcps ) {
 552                                 continue;
 553                         }
 554
 555                         Debug( LDAP_DEBUG_CONNS,
 556                                 "daemon: write active on %d\n",
 557                                 wd, 0, 0 );
 558
 559                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 560                         active = FD_ISSET( wd, &slap_daemon.sd_actives );
 561                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 562
 563                         if( ! active ) {
 564                                 /* descriptor no longer in FD set, should be closed */
 565                                 Debug( LDAP_DEBUG_CONNS,
 566                                         "daemon: write %d inactive, closing.\n", wd, 0, 0 );
 567                                 tcp_close( wd );
 568                                 continue;
 569                         }
 570
 571                         slapd_clr_write( wd, 0 );
 572                         if ( connection_write( wd ) < 0 ) {
 573                                 FD_CLR( (unsigned) wd, &readfds );
 574                                 slapd_close( wd );
 575                         }
 576                 }
 577
 578 #ifdef HAVE_WINSOCK
 579                 for ( i = 0; i < readfds.fd_count; i++ )
 580 #else
 581                 for ( i = 0; i < nfds; i++ )
 582 #endif
 583                 {
 584                         int rd, active;
 585
 586 #ifdef HAVE_WINSOCK
 587                         rd = readfds.fd_array[i];
 588 #else
 589                         if( ! FD_ISSET( i, &readfds ) ) {
 590                                 continue;
 591                         }
 592                         rd = i;
 593 #endif
 594
 595                         if ( rd == tcps ) {
 596                                 continue;
 597                         }
 598
 599                         Debug ( LDAP_DEBUG_CONNS,
 600                                 "daemon: read activity on %d\n", rd, 0, 0 );
 601
 602                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 603                         active = FD_ISSET( rd, &slap_daemon.sd_actives );
 604                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 605
 606                         if( ! active ) {
 607                                 /* descriptor no longer in FD set, should be closed */
 608                                 Debug( LDAP_DEBUG_CONNS,
 609                                         "daemon: read %d inactive, closing.\n", rd, 0, 0 );
 610                                 tcp_close( rd );
 611                                 continue;
 612                         }
 613
 614                         if ( connection_read( rd ) < 0 ) {
 615                                 slapd_close( rd );
 616                         }
 617                 }
 618                 ldap_pvt_thread_yield();
 619         }
 620
 621         if( slapd_shutdown > 0 ) {
 622                 Debug( LDAP_DEBUG_TRACE,
 623                         "daemon: shutdown requested (%d) and initiated.\n",
 624                         (int) slapd_shutdown, 0, 0 );
 625
 626         } else if ( slapd_shutdown < 0 ) {
 627                 Debug( LDAP_DEBUG_TRACE,
 628                         "daemon: abnormal condition (%d), shutdown initiated.\n",
 629                         (int) slapd_shutdown, 0, 0 );
 630         } else {
 631                 Debug( LDAP_DEBUG_TRACE,
 632                         "daemon: no active streams, shutdown initiated.\n",
 633                         0, 0, 0 );
 634         }
 635
 636         if( tcps >= 0 ) {
 637                 tcp_close( tcps );
 638         }
 639
 640         /* we only implement "quick" shutdown */
 641         connections_shutdown();
 642
 643         ldap_pvt_thread_mutex_lock( &active_threads_mutex );
 644         Debug( LDAP_DEBUG_ANY,
 645             "slapd shutdown: waiting for %d threads to terminate\n",
 646             active_threads, 0, 0 );
 647         while ( active_threads > 0 ) {
 648                 ldap_pvt_thread_cond_wait(&active_threads_cond, &active_threads_mutex);
 649         }
 650         ldap_pvt_thread_mutex_unlock( &active_threads_mutex );
 651
 652         slapd_listener = 0;
 653         return NULL;
 654 }
 655
 656 int slapd_daemon( int inetd, int tcps )
 657 {
 658         int rc;
 659         int *args = ch_malloc( sizeof( int[2] ) );
 660         args[0] = inetd;
 661         args[1] = tcps;
 662
 663     if ( !daemon_initialized ) sockinit();
 664
 665         connections_init();
 666
 667 #define SLAPD_LISTENER_THREAD 1
 668 #if defined( SLAPD_LISTENER_THREAD ) || !defined(HAVE_PTHREADS)
 669
 670         /* listener as a separate THREAD */
 671         rc = ldap_pvt_thread_create( &listener_tid,
 672                 0, slapd_daemon_task, args );
 673
 674         if ( rc != 0 ) {
 675                 Debug( LDAP_DEBUG_ANY,
 676                     "listener ldap_pvt_thread_create failed (%d)\n", rc, 0, 0 );
 677                 goto destory;
 678         }
 679
 680         /* wait for the listener thread to complete */
 681         ldap_pvt_thread_join( listener_tid, (void *) NULL );
 682 #else
 683         /* expermimental code */
 684         listener_tid = pthread_self();
 685         slapd_daemon_task( args );
 686 #endif
 687
 688         rc = 0;
 689
 690 destory:
 691         connections_destroy();
 692
 693 #ifdef HAVE_WINSOCK
 694     WSACleanup( );
 695 #endif
 696
 697         return rc;
 698 }
 699
 700 #ifdef HAVE_WINSOCK2
 701 void sockinit()
 702 {
 703     WORD wVersionRequested;
 704         WSADATA wsaData;
 705         int err;
 706
 707         wVersionRequested = MAKEWORD( 2, 0 );
 708
 709         err = WSAStartup( wVersionRequested, &wsaData );
 710         if ( err != 0 ) {
 711                 /* Tell the user that we couldn't find a usable */
 712                 /* WinSock DLL.                                  */
 713                 return;
 714         }
 715
 716         /* Confirm that the WinSock DLL supports 2.0.*/
 717         /* Note that if the DLL supports versions greater    */
 718         /* than 2.0 in addition to 2.0, it will still return */
 719         /* 2.0 in wVersion since that is the version we      */
 720         /* requested.                                        */
 721
 722         if ( LOBYTE( wsaData.wVersion ) != 2 ||
 723                 HIBYTE( wsaData.wVersion ) != 0 )
 724         {
 725             /* Tell the user that we couldn't find a usable */
 726             /* WinSock DLL.                                  */
 727             WSACleanup( );
 728             return;
 729         }
 730     daemon_initialized = 1;
 731 }       /* The WinSock DLL is acceptable. Proceed. */
 732
 733 void hit_socket( void )
 734 {
 735         int s, on = 1;
 736         extern struct sockaddr_in       bind_addr;
 737
 738         /* throw something at the socket to terminate the select() in the daemon thread. */
 739         if (( s = socket( AF_INET, SOCK_STREAM, 0 )) == INVALID_SOCKET )
 740                 Debug( LDAP_DEBUG_TRACE,
 741                         "slap_set_shutdown: socket failed\n\tWSAGetLastError=%d (%s)\n",
 742                         WSAGetLastError(), WSAGetLastErrorString(), 0 );
 743
 744         if ( ioctlsocket( s, FIONBIO, &on ) == -1 )
 745                 Debug( LDAP_DEBUG_TRACE,
 746                         "slap_set_shutdown:FIONBIO ioctl on %d faled\n\tWSAGetLastError=%d (%s)\n",
 747                         s, WSAGetLastError(), WSAGetLastError() );
 748
 749         bind_addr.sin_addr.s_addr = htonl( INADDR_LOOPBACK );
 750
 751         if ( connect( s, (struct sockaddr *)&bind_addr, sizeof( struct sockaddr_in )) == SOCKET_ERROR ) {
 752                 /* we can probably expect some error to occur here, mostly WSAEWOULDBLOCK */
 753         }
 754
 755         tcp_close(s);
 756 }
 757
 758 #elif HAVE_WINSOCK
 759 void sockinit()
 760 {       WSADATA wsaData;
 761         if ( WSAStartup( 0x0101, &wsaData ) != 0 ) {
 762             return( NULL );
 763         }
 764     daemon_initialized = 1;
 765 }
 766 #else
 767 void sockinit()
 768 {
 769     daemon_initialized = 1;
 770     return;
 771 }
 772 #endif
 773
 774 void
 775 slap_set_shutdown( int sig )
 776 {
 777         slapd_shutdown = sig;
 778 #ifndef HAVE_WINSOCK
 779         if(slapd_listener) {
 780                 ldap_pvt_thread_kill( listener_tid, LDAP_SIGUSR1 );
 781         }
 782 #else
 783         hit_socket();
 784 #endif
 785         /* reinstall self */
 786         (void) SIGNAL( sig, slap_set_shutdown );
 787 }
 788
 789 void
 790 slap_do_nothing( int sig )
 791 {
 792         /* reinstall self */
 793         (void) SIGNAL( sig, slap_do_nothing );
 794 }