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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-1999 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 /* globals */
  31 time_t starttime;
  32 ber_socket_t dtblsize;
  33
  34 typedef struct slap_listener {
  35         char* sl_url;
  36         char* sl_name;
  37 #ifdef HAVE_TLS
  38         int             sl_is_tls;
  39 #endif
  40         ber_socket_t            sl_sd;
  41         struct sockaddr_in      sl_addr;
  42 } Listener;
  43
  44 Listener **slap_listeners = NULL;
  45
  46 static ber_socket_t wake_sds[2];
  47
  48 #ifdef NO_THREADS
  49 static int waking;
  50 #define WAKE_LISTENER(w) \
  51 ((w && !waking) ? tcp_write( wake_sds[1], "0", 1 ), waking=1 : 0)
  52 #else
  53 #define WAKE_LISTENER(w) \
  54 do { if (w) tcp_write( wake_sds[1], "0", 1 ); } while(0)
  55 #endif
  56
  57 #ifdef HAVE_NT_SERVICE_MANAGER
  58 /* in nt_main.c */
  59 extern ldap_pvt_thread_cond_t                   started_event;
  60 #endif
  61
  62 #ifndef HAVE_WINSOCK
  63 static
  64 #endif
  65 volatile sig_atomic_t slapd_shutdown = 0;
  66
  67 static ldap_pvt_thread_t        listener_tid;
  68
  69 static struct slap_daemon {
  70         ldap_pvt_thread_mutex_t sd_mutex;
  71
  72         int sd_nactives;
  73
  74 #ifndef HAVE_WINSOCK
  75         /* In winsock, accept() returns values higher than dtblsize
  76                 so don't bother with this optimization */
  77         int sd_nfds;
  78 #endif
  79
  80         fd_set sd_actives;
  81         fd_set sd_readers;
  82         fd_set sd_writers;
  83 } slap_daemon;
  84
  85 /*
  86  * Add a descriptor to daemon control
  87  */
  88 static void slapd_add(ber_socket_t s) {
  89         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
  90
  91         assert( !FD_ISSET( s, &slap_daemon.sd_actives ));
  92         assert( !FD_ISSET( s, &slap_daemon.sd_readers ));
  93         assert( !FD_ISSET( s, &slap_daemon.sd_writers ));
  94
  95 #ifndef HAVE_WINSOCK
  96         if (s >= slap_daemon.sd_nfds) {
  97                 slap_daemon.sd_nfds = s + 1;
  98         }
  99 #endif
 100
 101         FD_SET( s, &slap_daemon.sd_actives );
 102         FD_SET( s, &slap_daemon.sd_readers );
 103
 104         Debug( LDAP_DEBUG_CONNS, "daemon: added %ld%s%s\n",
 105                 (long) s,
 106             FD_ISSET(s, &slap_daemon.sd_readers) ? "r" : "",
 107                 FD_ISSET(s, &slap_daemon.sd_writers) ? "w" : "" );
 108
 109         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 110 }
 111
 112 /*
 113  * Remove the descriptor from daemon control
 114  */
 115 void slapd_remove(ber_socket_t s, int wake) {
 116         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 117
 118         Debug( LDAP_DEBUG_CONNS, "daemon: removing %ld%s%s\n",
 119                 (long) s,
 120             FD_ISSET(s, &slap_daemon.sd_readers) ? "r" : "",
 121                 FD_ISSET(s, &slap_daemon.sd_writers) ? "w" : "" );
 122
 123         FD_CLR( s, &slap_daemon.sd_actives );
 124         FD_CLR( s, &slap_daemon.sd_readers );
 125         FD_CLR( s, &slap_daemon.sd_writers );
 126
 127         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 128         WAKE_LISTENER(wake);
 129 }
 130
 131 void slapd_clr_write(ber_socket_t s, int wake) {
 132         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 133
 134         assert( FD_ISSET( s, &slap_daemon.sd_actives) );
 135         FD_CLR( s, &slap_daemon.sd_writers );
 136
 137         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 138         WAKE_LISTENER(wake);
 139 }
 140
 141 void slapd_set_write(ber_socket_t s, int wake) {
 142         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 143
 144         assert( FD_ISSET( s, &slap_daemon.sd_actives) );
 145         if (!FD_ISSET(s, &slap_daemon.sd_writers))
 146             FD_SET( (unsigned) s, &slap_daemon.sd_writers );
 147
 148         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 149         WAKE_LISTENER(wake);
 150 }
 151
 152 void slapd_clr_read(ber_socket_t s, int wake) {
 153         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 154
 155         assert( FD_ISSET( s, &slap_daemon.sd_actives) );
 156         FD_CLR( s, &slap_daemon.sd_readers );
 157
 158         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 159         WAKE_LISTENER(wake);
 160 }
 161
 162 void slapd_set_read(ber_socket_t s, int wake) {
 163         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 164
 165         assert( FD_ISSET( s, &slap_daemon.sd_actives) );
 166         if (!FD_ISSET(s, &slap_daemon.sd_readers))
 167             FD_SET( s, &slap_daemon.sd_readers );
 168
 169         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 170         WAKE_LISTENER(wake);
 171 }
 172
 173 static void slapd_close(ber_socket_t s) {
 174         Debug( LDAP_DEBUG_CONNS, "daemon: closing %ld\n",
 175                 (long) s, 0, 0 );
 176         tcp_close(s);
 177 }
 178
 179
 180 static Listener *
 181 open_listener(
 182         const char* url,
 183         int port,
 184         int tls_port )
 185 {
 186         int     tmp, rc;
 187         Listener l;
 188         Listener *li;
 189         LDAPURLDesc *lud;
 190         char *s;
 191
 192         rc = ldap_url_parse( url, &lud );
 193
 194         if( rc != LDAP_URL_SUCCESS ) {
 195                 Debug( LDAP_DEBUG_ANY,
 196                         "daemon: listen URL \"%s\" parse error=%d\n",
 197                         url, rc, 0 );
 198                 return NULL;
 199         }
 200
 201 #ifndef HAVE_TLS
 202         if( lud->lud_ldaps ) {
 203                 Debug( LDAP_DEBUG_ANY,
 204                         "daemon: TLS not supported (%s)\n",
 205                         url, 0, 0 );
 206                 ldap_free_urldesc( lud );
 207                 return NULL;
 208         }
 209
 210         if(! lud->lud_port ) {
 211                 lud->lud_port = port;
 212         }
 213
 214 #else
 215         l.sl_is_tls = lud->lud_ldaps;
 216
 217         if(! lud->lud_port ) {
 218                 lud->lud_port = lud->lud_ldaps ? tls_port : port;
 219         }
 220 #endif
 221
 222         port = lud->lud_port;
 223
 224         (void) memset( (void*) &l.sl_addr, '\0', sizeof(l.sl_addr) );
 225
 226         l.sl_addr.sin_family = AF_INET;
 227         l.sl_addr.sin_port = htons( (unsigned short) lud->lud_port );
 228
 229         if( lud->lud_host == NULL || lud->lud_host[0] == '\0'
 230                 || strcmp(lud->lud_host, "*") == 0 )
 231         {
 232                 l.sl_addr.sin_addr.s_addr = htonl(INADDR_ANY);
 233
 234         } else {
 235                 /* host or address was specified */
 236                 if( !inet_aton( lud->lud_host, &l.sl_addr.sin_addr ) ) {
 237                         struct hostent *he = gethostbyname( lud->lud_host );
 238                         if( he == NULL ) {
 239                                 Debug( LDAP_DEBUG_ANY, "invalid host (%s) in URL: %s",
 240                                         lud->lud_host, url, 0);
 241                                 ldap_free_urldesc( lud );
 242                                 return NULL;
 243                         }
 244
 245                         memcpy( &l.sl_addr.sin_addr, he->h_addr,
 246                                sizeof( l.sl_addr.sin_addr ) );
 247                 }
 248         }
 249
 250         ldap_free_urldesc( lud );
 251
 252
 253         if ( (l.sl_sd = socket( AF_INET, SOCK_STREAM, 0 )) == AC_SOCKET_INVALID ) {
 254                 int err = sock_errno();
 255                 Debug( LDAP_DEBUG_ANY,
 256                         "daemon: socket() failed errno=%d (%s)\n", err,
 257                         sock_errstr(err), 0 );
 258                 return NULL;
 259         }
 260
 261 #ifndef HAVE_WINSOCK
 262         if ( l.sl_sd >= dtblsize ) {
 263                 Debug( LDAP_DEBUG_ANY,
 264                         "daemon: listener descriptor %ld is too great %ld\n",
 265                         (long) l.sl_sd, (long) dtblsize, 0 );
 266                 tcp_close( l.sl_sd );
 267                 return NULL;
 268         }
 269 #endif
 270
 271 #ifdef SO_REUSEADDR
 272         /* enable address reuse */
 273         tmp = 1;
 274         rc = setsockopt( l.sl_sd, SOL_SOCKET, SO_REUSEADDR,
 275                 (char *) &tmp, sizeof(tmp) );
 276         if ( rc == AC_SOCKET_ERROR ) {
 277                 int err = sock_errno();
 278                 Debug( LDAP_DEBUG_ANY,
 279                "slapd(%ld): setsockopt(SO_REUSEADDR) failed errno=%d (%s)\n",
 280                 (long) l.sl_sd, err, sock_errstr(err) );
 281         }
 282 #endif
 283 #ifdef SO_KEEPALIVE
 284         /* enable keep alives */
 285         tmp = 1;
 286         rc = setsockopt( l.sl_sd, SOL_SOCKET, SO_KEEPALIVE,
 287                 (char *) &tmp, sizeof(tmp) );
 288         if ( rc == AC_SOCKET_ERROR ) {
 289                 int err = sock_errno();
 290                 Debug( LDAP_DEBUG_ANY,
 291                         "slapd(%ld): setsockopt(SO_KEEPALIVE) failed errno=%d (%s)\n",
 292                 (long) l.sl_sd, err, sock_errstr(err) );
 293         }
 294 #endif
 295 #ifdef TCP_NODELAY
 296         /* enable no delay */
 297         tmp = 1;
 298         rc = setsockopt( l.sl_sd, IPPROTO_TCP, TCP_NODELAY,
 299                 (char *)&tmp, sizeof(tmp) );
 300         if ( rc == AC_SOCKET_ERROR ) {
 301                 int err = sock_errno();
 302                 Debug( LDAP_DEBUG_ANY,
 303                         "slapd(%ld): setsockopt(TCP_NODELAY) failed errno=%d (%s)\n",
 304                 (long) l.sl_sd, err, sock_errstr(err) );
 305         }
 306 #endif
 307
 308         rc = bind( l.sl_sd, (struct sockaddr *) &l.sl_addr, sizeof(l.sl_addr) );
 309         if ( rc == AC_SOCKET_ERROR ) {
 310                 int err = sock_errno();
 311                 Debug( LDAP_DEBUG_ANY, "daemon: bind(%ld) failed errno=%d (%s)\n",
 312                 (long) l.sl_sd, err, sock_errstr(err) );
 313                 tcp_close( l.sl_sd );
 314                 return NULL;
 315         }
 316
 317         l.sl_url = ch_strdup( url );
 318
 319         l.sl_name = ch_malloc( sizeof("IP=255.255.255.255:65336") );
 320         s = inet_ntoa( l.sl_addr.sin_addr );
 321         sprintf( l.sl_name, "IP=%s:%d",
 322                 s != NULL ? s : "unknown" , port );
 323
 324         li = ch_malloc( sizeof( Listener ) );
 325         *li = l;
 326
 327         Debug( LDAP_DEBUG_TRACE, "daemon: initialized %s\n",
 328                 l.sl_url, 0, 0 );
 329
 330         return li;
 331 }
 332
 333 static int sockinit(void);
 334 static int sockdestroy(void);
 335
 336 int slapd_daemon_init(char *urls, int port, int tls_port )
 337 {
 338         int i, rc;
 339         char **u;
 340
 341 #ifndef HAVE_TLS
 342         assert( tls_port == 0 );
 343 #endif
 344
 345         Debug( LDAP_DEBUG_ARGS, "daemon_init: %s (%d/%d)\n",
 346                 urls ? urls : "<null>", port, tls_port );
 347
 348         if( (rc = sockinit()) != 0 ) {
 349                 return rc;
 350         }
 351
 352 #ifdef HAVE_SYSCONF
 353         dtblsize = sysconf( _SC_OPEN_MAX );
 354 #elif HAVE_GETDTABLESIZE
 355         dtblsize = getdtablesize();
 356 #else
 357         dtblsize = FD_SETSIZE;
 358 #endif
 359
 360 #ifdef FD_SETSIZE
 361         if(dtblsize > FD_SETSIZE) {
 362                 dtblsize = FD_SETSIZE;
 363         }
 364 #endif  /* !FD_SETSIZE */
 365
 366         /* open a pipe (or something equivalent connected to itself).
 367          * we write a byte on this fd whenever we catch a signal. The main
 368          * loop will be select'ing on this socket, and will wake up when
 369          * this byte arrives.
 370          */
 371         if( (rc = lutil_pair( wake_sds )) < 0 ) {
 372                 Debug( LDAP_DEBUG_ANY,
 373                         "daemon: lutil_pair() failed rc=%d\n", rc, 0, 0 );
 374                 return rc;
 375         }
 376
 377         FD_ZERO( &slap_daemon.sd_readers );
 378         FD_ZERO( &slap_daemon.sd_writers );
 379
 380         if( urls == NULL ) {
 381                 urls = "ldap:///";
 382         }
 383
 384         u = str2charray( urls, " " );
 385
 386         if( u == NULL || u[0] == NULL ) {
 387                 Debug( LDAP_DEBUG_ANY, "daemon_init: no urls (%s) provided.\n",
 388                         urls, 0, 0 );
 389
 390                 return -1;
 391         }
 392
 393         for( i=0; u[i] != NULL; i++ ) {
 394                 Debug( LDAP_DEBUG_TRACE, "daemon_init: listen on %s\n",
 395                         u[i], 0, 0 );
 396         }
 397
 398         if( i == 0 ) {
 399                 Debug( LDAP_DEBUG_ANY, "daemon_init: no listeners to open (%s)\n",
 400                         urls, 0, 0 );
 401                 charray_free( u );
 402                 return -1;
 403         }
 404
 405         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners to open...\n",
 406                 i, 0, 0 );
 407
 408         slap_listeners = ch_malloc( (i+1)*sizeof(Listener *) );
 409
 410         for(i = 0; u[i] != NULL; i++ ) {
 411                 slap_listeners[i] = open_listener( u[i], port, tls_port );
 412
 413                 if( slap_listeners[i] == NULL ) {
 414                         charray_free( u );
 415                         return -1;
 416                 }
 417         }
 418         slap_listeners[i] = NULL;
 419
 420         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners opened\n",
 421                 i, 0, 0 );
 422
 423         charray_free( u );
 424         ldap_pvt_thread_mutex_init( &slap_daemon.sd_mutex );
 425         return !i;
 426 }
 427
 428
 429 int
 430 slapd_daemon_destroy(void)
 431 {
 432         connections_destroy();
 433         tcp_close( wake_sds[1] );
 434         tcp_close( wake_sds[0] );
 435         sockdestroy();
 436         return 0;
 437 }
 438
 439
 440 static void *
 441 slapd_daemon_task(
 442         void *ptr
 443 )
 444 {
 445         int l;
 446         time_t  last_idle_check = slap_get_time();
 447         time( &starttime );
 448
 449         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
 450                 if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID )
 451                         continue;
 452
 453                 if ( listen( slap_listeners[l]->sl_sd, 5 ) == -1 ) {
 454                         int err = sock_errno();
 455                         Debug( LDAP_DEBUG_ANY,
 456                                 "daemon: listen(%s, 5) failed errno=%d (%s)\n",
 457                                         slap_listeners[l]->sl_url, err,
 458                                         sock_errstr(err) );
 459                         return( (void*)-1 );
 460                 }
 461
 462                 slapd_add( slap_listeners[l]->sl_sd );
 463         }
 464
 465 #ifdef HAVE_NT_SERVICE_MANAGER
 466         if ( started_event != NULL ) {
 467                 ldap_pvt_thread_cond_signal( &started_event );
 468         }
 469 #endif
 470         /* initialization complete. Here comes the loop. */
 471
 472         while ( !slapd_shutdown ) {
 473                 ber_socket_t i;
 474                 int ns;
 475                 int at;
 476                 ber_socket_t nfds;
 477 #define SLAPD_EBADF_LIMIT 10
 478                 int ebadf = 0;
 479
 480 #define SLAPD_IDLE_CHECK_LIMIT 4
 481                 time_t  now = slap_get_time();
 482
 483
 484                 fd_set                  readfds;
 485                 fd_set                  writefds;
 486
 487                 struct sockaddr_in      from;
 488 #if defined(SLAPD_RLOOKUPS) || defined(HAVE_TCPD)
 489         struct hostent          *hp;
 490 #endif
 491                 struct timeval          zero;
 492                 struct timeval          *tvp;
 493
 494                 if( global_idletimeout > 0 && difftime(
 495                         last_idle_check+global_idletimeout/SLAPD_IDLE_CHECK_LIMIT,
 496                         now ) < 0 )
 497                 {
 498                         connections_timeout_idle(now);
 499                 }
 500
 501                 FD_ZERO( &writefds );
 502                 FD_ZERO( &readfds );
 503
 504                 zero.tv_sec = 0;
 505                 zero.tv_usec = 0;
 506
 507                 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 508
 509 #ifdef FD_SET_MANUAL_COPY
 510                 for( s = 0; s < nfds; s++ ) {
 511                         if(FD_ISSET( &slap_sd_readers, s )) {
 512                                 FD_SET( s, &readfds );
 513                         }
 514                         if(FD_ISSET( &slap_sd_writers, s )) {
 515                                 FD_SET( s, &writefds );
 516                         }
 517                 }
 518 #else
 519                 memcpy( &readfds, &slap_daemon.sd_readers, sizeof(fd_set) );
 520                 memcpy( &writefds, &slap_daemon.sd_writers, sizeof(fd_set) );
 521 #endif
 522                 assert(!FD_ISSET(wake_sds[0], &readfds));
 523                 FD_SET( wake_sds[0], &readfds );
 524
 525                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
 526                         if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID )
 527                                 continue;
 528                         if (!FD_ISSET(slap_listeners[l]->sl_sd, &readfds))
 529                             FD_SET( slap_listeners[l]->sl_sd, &readfds );
 530                 }
 531
 532 #ifndef HAVE_WINSOCK
 533                 nfds = slap_daemon.sd_nfds;
 534 #else
 535                 nfds = dtblsize;
 536 #endif
 537
 538                 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 539
 540                 ldap_pvt_thread_mutex_lock( &active_threads_mutex );
 541                 at = active_threads;
 542                 ldap_pvt_thread_mutex_unlock( &active_threads_mutex );
 543
 544 #if defined( HAVE_YIELDING_SELECT ) || defined( NO_THREADS )
 545                 tvp = NULL;
 546 #else
 547                 tvp = at ? &zero : NULL;
 548 #endif
 549
 550                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
 551                         if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID )
 552                                 continue;
 553
 554                         Debug( LDAP_DEBUG_CONNS,
 555                                 "daemon: select: listen=%d active_threads=%d tvp=%s\n",
 556                                         slap_listeners[l]->sl_sd, at,
 557                                         tvp == NULL ? "NULL" : "zero" );
 558                 }
 559
 560                 switch(ns = select( nfds, &readfds,
 561 #ifdef HAVE_WINSOCK
 562                         /* don't pass empty fd_set */
 563                         ( writefds.fd_count > 0 ? &writefds : NULL ),
 564 #else
 565                         &writefds,
 566 #endif
 567                         NULL, tvp ))
 568                 {
 569                 case -1: {      /* failure - try again */
 570                                 int err = sock_errno();
 571
 572                                 if( err == EBADF && ++ebadf < SLAPD_EBADF_LIMIT) {
 573                                         continue;
 574                                 }
 575
 576                                 if( err != EINTR ) {
 577                                         Debug( LDAP_DEBUG_CONNS,
 578                                                 "daemon: select failed (%d): %s\n",
 579                                                 err, sock_errstr(err), 0 );
 580
 581                                         slapd_shutdown = -1;
 582                                 }
 583                         }
 584                         continue;
 585
 586                 case 0:         /* timeout - let threads run */
 587                         ebadf = 0;
 588                         Debug( LDAP_DEBUG_CONNS, "daemon: select timeout - yielding\n",
 589                             0, 0, 0 );
 590                 ldap_pvt_thread_yield();
 591                         continue;
 592
 593                 default:        /* something happened - deal with it */
 594                         ebadf = 0;
 595                         Debug( LDAP_DEBUG_CONNS, "daemon: activity on %d descriptors\n",
 596                                 ns, 0, 0 );
 597                         /* FALL THRU */
 598                 }
 599
 600                 if( FD_ISSET( wake_sds[0], &readfds ) ) {
 601                         char c[BUFSIZ];
 602                         tcp_read( wake_sds[0], c, sizeof(c) );
 603 #ifdef NO_THREADS
 604                         waking = 0;
 605 #endif
 606                         continue;
 607                 }
 608
 609                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
 610                         ber_int_t s;
 611                         socklen_t len = sizeof(from);
 612                         long id;
 613
 614                         char    *dnsname;
 615                         char    *peeraddr;
 616
 617                         char    peername[sizeof("IP=255.255.255.255:65336")];
 618
 619                         if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID )
 620                                 continue;
 621
 622                         if ( !FD_ISSET( slap_listeners[l]->sl_sd, &readfds ) )
 623                                 continue;
 624
 625                         if ( (s = accept( slap_listeners[l]->sl_sd,
 626                                 (struct sockaddr *) &from, &len )) == AC_SOCKET_INVALID )
 627                         {
 628                                 int err = sock_errno();
 629                                 Debug( LDAP_DEBUG_ANY,
 630                                     "daemon: accept(%ld) failed errno=%d (%s)\n",
 631                                     (long) slap_listeners[l]->sl_sd, err,
 632                                     sock_errstr(err) );
 633                                 continue;
 634                         }
 635
 636 #ifdef LDAP_DEBUG
 637                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 638
 639                         /* newly accepted stream should not be in any of the FD SETS */
 640
 641                         assert( !FD_ISSET( s, &slap_daemon.sd_actives) );
 642                         assert( !FD_ISSET( s, &slap_daemon.sd_readers) );
 643                         assert( !FD_ISSET( s, &slap_daemon.sd_writers) );
 644
 645                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 646 #endif
 647
 648 #ifndef HAVE_WINSOCK
 649                         /* make sure descriptor number isn't too great */
 650                         if ( s >= dtblsize ) {
 651                                 Debug( LDAP_DEBUG_ANY,
 652                                         "daemon: %ld beyond descriptor table size %ld\n",
 653                                         (long) s, (long) dtblsize, 0 );
 654                                 slapd_close(s);
 655                                 continue;
 656                         }
 657 #endif
 658
 659                         Debug( LDAP_DEBUG_CONNS, "daemon: new connection on %ld\n",
 660                                 (long) s, 0, 0 );
 661
 662                         len = sizeof(from);
 663
 664                         if ( getpeername( s, (struct sockaddr *) &from, &len ) != 0 ) {
 665                                 int err = sock_errno();
 666                                 Debug( LDAP_DEBUG_ANY,
 667                                         "daemon: getpeername( %ld ) failed: errno=%d (%s)\n",
 668                                         (long) s, err, sock_errstr(err) );
 669                                 slapd_close(s);
 670                                 continue;
 671                         }
 672
 673                         peeraddr = inet_ntoa( from.sin_addr );
 674                         sprintf( peername, "IP=%s:%d",
 675                                 peeraddr != NULL ? peeraddr : "unknown",
 676                                 (unsigned) ntohs( from.sin_port ) );
 677
 678 #if defined(SLAPD_RLOOKUPS) || defined(HAVE_TCPD)
 679                         hp = gethostbyaddr( (char *)
 680                             &(from.sin_addr),
 681                             sizeof(from.sin_addr), AF_INET );
 682
 683                         if(hp) {
 684                                 dnsname = ldap_pvt_str2lower( hp->h_name );
 685
 686                         } else {
 687                                 dnsname = NULL;
 688                         }
 689 #else
 690                         dnsname = NULL;
 691 #endif
 692
 693 #ifdef HAVE_TCPD
 694                         if( !hosts_ctl("slapd",
 695                                 dnsname != NULL ? dnsname : STRING_UNKNOWN,
 696                                 peeraddr != NULL ? peeraddr : STRING_UNKNOWN,
 697                                 STRING_UNKNOWN ))
 698                         {
 699                                 /* DENY ACCESS */
 700                                 Statslog( LDAP_DEBUG_ANY,
 701                                  "fd=%ld connection from %s (%s) denied.\n",
 702                                         (long) s,
 703                                         dnsname != NULL ? dnsname : "unknown",
 704                                         peeraddr != NULL ? peeraddr : "unknown",
 705                                   0, 0 );
 706
 707                                 slapd_close(s);
 708                                 continue;
 709                         }
 710 #endif /* HAVE_TCPD */
 711
 712                         if( (id = connection_init(s,
 713                                 slap_listeners[l]->sl_url,
 714                                 dnsname != NULL ? dnsname : "unknown",
 715                                 peername,
 716                                 slap_listeners[l]->sl_name,
 717 #ifdef HAVE_TLS
 718                                 slap_listeners[l]->sl_is_tls
 719 #else
 720                                 0
 721 #endif
 722                                 )) < 0 )
 723                         {
 724                                 Debug( LDAP_DEBUG_ANY,
 725                                         "daemon: connection_init(%ld, %s, %s) failed.\n",
 726                                         (long) s,
 727                                         peername,
 728                                         slap_listeners[l]->sl_name );
 729                                 slapd_close(s);
 730                                 continue;
 731                         }
 732
 733                         Statslog( LDAP_DEBUG_STATS,
 734                                 "daemon: conn=%ld fd=%ld connection from %s (%s) accepted.\n",
 735                                 id, (long) s,
 736                                 peername,
 737                                 slap_listeners[l]->sl_name,
 738                                 0 );
 739
 740                         slapd_add( s );
 741                         continue;
 742                 }
 743
 744 #ifdef LDAP_DEBUG
 745                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
 746 #ifdef HAVE_WINSOCK
 747                 for ( i = 0; i < readfds.fd_count; i++ ) {
 748                         Debug( LDAP_DEBUG_CONNS, " %d%s",
 749                                 readfds.fd_array[i], "r", 0 );
 750                 }
 751                 for ( i = 0; i < writefds.fd_count; i++ ) {
 752                         Debug( LDAP_DEBUG_CONNS, " %d%s",
 753                                 writefds.fd_array[i], "w", 0 );
 754                 }
 755 #else
 756                 for ( i = 0; i < nfds; i++ ) {
 757                         int     r, w;
 758                         int     is_listener = 0;
 759
 760                         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
 761                                 if ( i == slap_listeners[l]->sl_sd ) {
 762                                         is_listener = 1;
 763                                         break;
 764                                 }
 765                         }
 766                         if ( is_listener ) {
 767                                 continue;
 768                         }
 769                         r = FD_ISSET( i, &readfds );
 770                         w = FD_ISSET( i, &writefds );
 771                         if ( r || w ) {
 772                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", i,
 773                                     r ? "r" : "", w ? "w" : "" );
 774                         }
 775                 }
 776 #endif
 777                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
 778 #endif
 779
 780                 /* loop through the writers */
 781 #ifdef HAVE_WINSOCK
 782                 for ( i = 0; i < writefds.fd_count; i++ )
 783 #else
 784                 for ( i = 0; i < nfds; i++ )
 785 #endif
 786                 {
 787                         ber_socket_t wd;
 788                         int is_listener = 0;
 789 #ifdef HAVE_WINSOCK
 790                         wd = writefds.fd_array[i];
 791 #else
 792                         if( ! FD_ISSET( i, &writefds ) ) {
 793                                 continue;
 794                         }
 795                         wd = i;
 796 #endif
 797
 798                         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
 799                                 if ( i == slap_listeners[l]->sl_sd ) {
 800                                         is_listener = 1;
 801                                         break;
 802                                 }
 803                         }
 804                         if ( is_listener ) {
 805                                 continue;
 806                         }
 807                         Debug( LDAP_DEBUG_CONNS,
 808                                 "daemon: write active on %d\n",
 809                                 wd, 0, 0 );
 810
 811                         /*
 812                          * NOTE: it is possible that the connection was closed
 813                          * and that the stream is now inactive.
 814                          * connection_write() must valid the stream is still
 815                          * active.
 816                          */
 817
 818                         if ( connection_write( wd ) < 0 ) {
 819                                 FD_CLR( (unsigned) wd, &readfds );
 820                                 slapd_close( wd );
 821                         }
 822                 }
 823
 824 #ifdef HAVE_WINSOCK
 825                 for ( i = 0; i < readfds.fd_count; i++ )
 826 #else
 827                 for ( i = 0; i < nfds; i++ )
 828 #endif
 829                 {
 830                         ber_socket_t rd;
 831                         int is_listener = 0;
 832
 833 #ifdef HAVE_WINSOCK
 834                         rd = readfds.fd_array[i];
 835 #else
 836                         if( ! FD_ISSET( i, &readfds ) ) {
 837                                 continue;
 838                         }
 839                         rd = i;
 840 #endif
 841
 842                         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
 843                                 if ( rd == slap_listeners[l]->sl_sd ) {
 844                                         is_listener = 1;
 845                                         break;
 846                                 }
 847                         }
 848                         if ( is_listener ) {
 849                                 continue;
 850                         }
 851
 852                         Debug ( LDAP_DEBUG_CONNS,
 853                                 "daemon: read activity on %d\n", rd, 0, 0 );
 854
 855                         /*
 856                          * NOTE: it is possible that the connection was closed
 857                          * and that the stream is now inactive.
 858                          * connection_read() must valid the stream is still
 859                          * active.
 860                          */
 861
 862                         if ( connection_read( rd ) < 0 ) {
 863                                 slapd_close( rd );
 864                         }
 865                 }
 866                 ldap_pvt_thread_yield();
 867         }
 868
 869         if( slapd_shutdown > 0 ) {
 870                 Debug( LDAP_DEBUG_TRACE,
 871                         "daemon: shutdown requested and initiated.\n",
 872                         0, 0, 0 );
 873
 874         } else if ( slapd_shutdown < 0 ) {
 875                 Debug( LDAP_DEBUG_TRACE,
 876                         "daemon: abnormal condition, shutdown initiated.\n",
 877                         0, 0, 0 );
 878         } else {
 879                 Debug( LDAP_DEBUG_TRACE,
 880                         "daemon: no active streams, shutdown initiated.\n",
 881                         0, 0, 0 );
 882         }
 883
 884         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
 885                 if ( slap_listeners[l]->sl_sd != AC_SOCKET_INVALID ) {
 886                         slapd_close( slap_listeners[l]->sl_sd );
 887                         break;
 888                 }
 889         }
 890
 891         ldap_pvt_thread_mutex_lock( &active_threads_mutex );
 892         Debug( LDAP_DEBUG_ANY,
 893             "slapd shutdown: waiting for %d threads to terminate\n",
 894             active_threads, 0, 0 );
 895         while ( active_threads > 0 ) {
 896                 ldap_pvt_thread_cond_wait(&active_threads_cond, &active_threads_mutex);
 897         }
 898         ldap_pvt_thread_mutex_unlock( &active_threads_mutex );
 899
 900         return NULL;
 901 }
 902
 903
 904 int slapd_daemon( void )
 905 {
 906         int rc;
 907
 908         connections_init();
 909
 910 #define SLAPD_LISTENER_THREAD 1
 911 #if defined( SLAPD_LISTENER_THREAD ) || !defined(HAVE_PTHREADS)
 912
 913         /* listener as a separate THREAD */
 914         rc = ldap_pvt_thread_create( &listener_tid,
 915                 0, slapd_daemon_task, NULL );
 916
 917         if ( rc != 0 ) {
 918                 Debug( LDAP_DEBUG_ANY,
 919                     "listener ldap_pvt_thread_create failed (%d)\n", rc, 0, 0 );
 920                 return rc;
 921         }
 922
 923         /* wait for the listener thread to complete */
 924         ldap_pvt_thread_join( listener_tid, (void *) NULL );
 925 #else
 926         /* expermimental code */
 927         listener_tid = pthread_self();
 928         slapd_daemon_task( NULL );
 929 #endif
 930
 931         return 0;
 932
 933 }
 934
 935 #ifdef HAVE_WINSOCK2
 936 int sockinit(void)
 937 {
 938     WORD wVersionRequested;
 939         WSADATA wsaData;
 940         int err;
 941
 942         wVersionRequested = MAKEWORD( 2, 0 );
 943
 944         err = WSAStartup( wVersionRequested, &wsaData );
 945         if ( err != 0 ) {
 946                 /* Tell the user that we couldn't find a usable */
 947                 /* WinSock DLL.                                  */
 948                 return -1;
 949         }
 950
 951         /* Confirm that the WinSock DLL supports 2.0.*/
 952         /* Note that if the DLL supports versions greater    */
 953         /* than 2.0 in addition to 2.0, it will still return */
 954         /* 2.0 in wVersion since that is the version we      */
 955         /* requested.                                        */
 956
 957         if ( LOBYTE( wsaData.wVersion ) != 2 ||
 958                 HIBYTE( wsaData.wVersion ) != 0 )
 959         {
 960             /* Tell the user that we couldn't find a usable */
 961             /* WinSock DLL.                                  */
 962             WSACleanup();
 963             return -1;
 964         }
 965
 966         /* The WinSock DLL is acceptable. Proceed. */
 967         return 0;
 968 }
 969
 970 int sockdestroy(void)
 971 {
 972         WSACleanup();
 973         return 0;
 974 }
 975
 976 #elif HAVE_WINSOCK
 977 static int sockinit(void)
 978 {
 979         WSADATA wsaData;
 980         if ( WSAStartup( 0x0101, &wsaData ) != 0 ) {
 981             return -1;
 982         }
 983         return 0;
 984 }
 985 static int sockdestroy(void)
 986 {
 987         WSACleanup();
 988         return 0;
 989 }
 990
 991 #else
 992 static int sockinit(void)
 993 {
 994         return 0;
 995 }
 996 static int sockdestroy(void)
 997 {
 998         return 0;
 999 }
1000 #endif
1001
1002 RETSIGTYPE
1003 slap_sig_shutdown( int sig )
1004 {
1005         slapd_shutdown = sig;
1006         WAKE_LISTENER(1);
1007
1008         /* reinstall self */
1009         (void) SIGNAL( sig, slap_sig_shutdown );
1010 }
1011
1012 RETSIGTYPE
1013 slap_sig_wake( int sig )
1014 {
1015         WAKE_LISTENER(1);
1016
1017         /* reinstall self */
1018         (void) SIGNAL( sig, slap_sig_wake );
1019 }