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

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1998-2005 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  16  * All rights reserved.
  17  *
  18  * Redistribution and use in source and binary forms are permitted
  19  * provided that this notice is preserved and that due credit is given
  20  * to the University of Michigan at Ann Arbor. The name of the University
  21  * may not be used to endorse or promote products derived from this
  22  * software without specific prior written permission. This software
  23  * is provided ``as is'' without express or implied warranty.
  24  */
  25
  26 #include "portable.h"
  27
  28 #include <stdio.h>
  29
  30 #include <ac/ctype.h>
  31 #include <ac/errno.h>
  32 #include <ac/socket.h>
  33 #include <ac/string.h>
  34 #include <ac/time.h>
  35 #include <ac/unistd.h>
  36
  37 #include "slap.h"
  38 #include "ldap_pvt_thread.h"
  39 #include "lutil.h"
  40
  41 #include "ldap_rq.h"
  42
  43 #if defined(HAVE_SYS_EPOLL_H) && defined(HAVE_EPOLL)
  44 # include <sys/epoll.h>
  45 #endif
  46
  47 #ifdef HAVE_TCPD
  48 # include <tcpd.h>
  49 int allow_severity = LOG_INFO;
  50 int deny_severity = LOG_NOTICE;
  51
  52 # define SLAP_STRING_UNKNOWN    STRING_UNKNOWN
  53 #else /* ! TCP Wrappers */
  54 # define SLAP_STRING_UNKNOWN    "unknown"
  55 #endif /* ! TCP Wrappers */
  56
  57 #ifdef LDAP_PF_LOCAL
  58 # include <sys/stat.h>
  59 /* this should go in <ldap.h> as soon as it is accepted */
  60 # define LDAPI_MOD_URLEXT               "x-mod"
  61 #endif /* LDAP_PF_LOCAL */
  62
  63 #ifdef LDAP_PF_INET6
  64 int slap_inet4or6 = AF_UNSPEC;
  65 #else
  66 int slap_inet4or6 = AF_INET;
  67 #endif
  68
  69 /* globals */
  70 time_t starttime;
  71 ber_socket_t dtblsize;
  72 slap_ssf_t local_ssf = LDAP_PVT_SASL_LOCAL_SSF;
  73 struct runqueue_s slapd_rq;
  74
  75 Listener **slap_listeners = NULL;
  76
  77 #ifndef SLAPD_LISTEN_BACKLOG
  78 #define SLAPD_LISTEN_BACKLOG 1024
  79 #endif
  80
  81 static ber_socket_t wake_sds[2];
  82 static int emfile;
  83
  84 static int waking;
  85 #define WAKE_LISTENER(w)        do { \
  86         if ((w) && waking < 5) { \
  87                 waking++; \
  88                 tcp_write( wake_sds[1], "0", 1 ); \
  89         } \
  90 } while(0)
  91
  92 volatile sig_atomic_t slapd_shutdown = 0;
  93 volatile sig_atomic_t slapd_gentle_shutdown = 0;
  94 volatile sig_atomic_t slapd_abrupt_shutdown = 0;
  95
  96 static struct slap_daemon {
  97         ldap_pvt_thread_mutex_t sd_mutex;
  98 #ifdef HAVE_TCPD
  99         ldap_pvt_thread_mutex_t tcpd_mutex;
 100 #endif
 101
 102         ber_socket_t sd_nactives;
 103         int sd_nwriters;
 104
 105 #ifdef HAVE_EPOLL
 106         struct epoll_event *sd_epolls;
 107         int     sd_nepolls;
 108         int     *sd_index;
 109         int     sd_epfd;
 110         int     sd_nfds;
 111 #else
 112 #ifndef HAVE_WINSOCK
 113         /* In winsock, accept() returns values higher than dtblsize
 114                 so don't bother with this optimization */
 115         int sd_nfds;
 116 #endif
 117         fd_set sd_actives;
 118         fd_set sd_readers;
 119         fd_set sd_writers;
 120 #endif
 121 } slap_daemon;
 122
 123 #ifdef HAVE_EPOLL
 124 # define SLAP_EVENTS_ARE_INDEXED        0
 125 # define SLAP_SOCK_IX(s)        (slap_daemon.sd_index[(s)])
 126 # define SLAP_SOCK_EP(s)        (slap_daemon.sd_epolls[SLAP_SOCK_IX(s)])
 127 # define SLAP_SOCK_EV(s)        (SLAP_SOCK_EP(s).events)
 128 # define SLAP_SOCK_IS_ACTIVE(s) (SLAP_SOCK_IX(s) != -1)
 129 # define SLAP_SOCK_NOT_ACTIVE(s)        (SLAP_SOCK_IX(s) == -1)
 130 # define SLAP_SOCK_IS_SET(s, mode)      (SLAP_SOCK_EV(s) & (mode))
 131
 132 # define SLAP_SOCK_IS_READ(s)   SLAP_SOCK_IS_SET((s), EPOLLIN)
 133 # define SLAP_SOCK_IS_WRITE(s)  SLAP_SOCK_IS_SET((s), EPOLLOUT)
 134
 135 # define SLAP_SET_SOCK(s, mode) do { \
 136         if ((SLAP_SOCK_EV(s) & (mode)) != (mode)) {     \
 137                 SLAP_SOCK_EV(s) |= (mode); \
 138                 epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_MOD, (s), \
 139                         &SLAP_SOCK_EP(s)); \
 140         } \
 141 } while(0)
 142
 143 # define SLAP_CLR_SOCK(s, mode) do { \
 144         if ((SLAP_SOCK_EV(s) & (mode))) { \
 145                 SLAP_SOCK_EV(s) &= ~(mode);     \
 146                 epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_MOD, s, \
 147                         &SLAP_SOCK_EP(s)); \
 148         } \
 149 } while(0)
 150
 151 # define SLAP_SOCK_SET_READ(s)  SLAP_SET_SOCK(s, EPOLLIN)
 152 # define SLAP_SOCK_SET_WRITE(s) SLAP_SET_SOCK(s, EPOLLOUT)
 153
 154 # ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 155 #  define SLAP_SOCK_SET_SUSPEND(s) \
 156         ( slap_daemon.sd_suspend[SLAP_SOCK_IX(s)] = 1 )
 157 #  define SLAP_SOCK_CLR_SUSPEND(s) \
 158         ( slap_daemon.sd_suspend[SLAP_SOCK_IX(s)] = 0 )
 159 #  define SLAP_SOCK_IS_SUSPEND(s) \
 160         ( slap_daemon.sd_suspend[SLAP_SOCK_IX(s)] == 1 )
 161 # endif
 162
 163 # define SLAP_SOCK_CLR_READ(s)  SLAP_CLR_SOCK((s), EPOLLIN)
 164 # define SLAP_SOCK_CLR_WRITE(s) SLAP_CLR_SOCK((s), EPOLLOUT)
 165
 166 # define SLAP_CLR_EVENT(i, mode)        (revents[(i)].events &= ~(mode))
 167
 168 # define SLAP_EVENT_MAX slap_daemon.sd_nfds
 169
 170 /* If a Listener address is provided, store that as the epoll data.
 171  * Otherwise, store the address of this socket's slot in the
 172  * index array. If we can't do this add, the system is out of
 173  * resources and we need to shutdown.
 174  */
 175 # define SLAP_ADD_SOCK(s, l) do { \
 176         int rc; \
 177         SLAP_SOCK_IX((s)) = slap_daemon.sd_nfds; \
 178         SLAP_SOCK_EP((s)).data.ptr = (l) ? (l) : (void *)(&SLAP_SOCK_IX(s)); \
 179         SLAP_SOCK_EV((s)) = EPOLLIN; \
 180         rc = epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_ADD, \
 181                 (s), &SLAP_SOCK_EP((s))); \
 182         if ( rc == 0 ) { \
 183                 slap_daemon.sd_nfds++; \
 184         } else { \
 185                 Debug( LDAP_DEBUG_ANY, \
 186                         "daemon: epoll_ctl(ADD,fd=%d) failed, errno=%d, shutting down\n", \
 187                         s, errno, 0 ); \
 188                 slapd_shutdown = 2; \
 189         } \
 190 } while (0)
 191
 192 # define SLAP_EV_LISTENER(ptr) (((int *)(ptr) >= slap_daemon.sd_index && \
 193         (int *)(ptr) <= (slap_daemon.sd_index+dtblsize)) ? 0 : 1 )
 194
 195 # define SLAP_EV_PTRFD(ptr) (SLAP_EV_LISTENER(ptr) ? \
 196         ((Listener *)ptr)->sl_sd : (int *)(ptr) - slap_daemon.sd_index)
 197
 198 # define SLAP_DEL_SOCK(s) do { \
 199         int fd, rc, index = SLAP_SOCK_IX((s)); \
 200         if ( index < 0 ) break; \
 201         rc = epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_DEL, \
 202                 (s), &SLAP_SOCK_EP((s))); \
 203         slap_daemon.sd_epolls[index] = \
 204                 slap_daemon.sd_epolls[slap_daemon.sd_nfds-1]; \
 205         fd = SLAP_EV_PTRFD(slap_daemon.sd_epolls[index].data.ptr); \
 206         slap_daemon.sd_index[fd] = index; \
 207         slap_daemon.sd_index[(s)] = -1; \
 208         slap_daemon.sd_nfds--; \
 209 } while (0)
 210
 211 # define SLAP_EVENT_CLR_READ(i) SLAP_CLR_EVENT((i), EPOLLIN)
 212 # define SLAP_EVENT_CLR_WRITE(i)        SLAP_CLR_EVENT((i), EPOLLOUT)
 213
 214 # define SLAP_CHK_EVENT(i, mode)        (revents[(i)].events & mode)
 215
 216 # define SLAP_EVENT_IS_READ(i)  SLAP_CHK_EVENT((i), EPOLLIN)
 217 # define SLAP_EVENT_IS_WRITE(i) SLAP_CHK_EVENT((i), EPOLLOUT)
 218 # define SLAP_EVENT_IS_LISTENER(i)      SLAP_EV_LISTENER(revents[(i)].data.ptr)
 219 # define SLAP_EVENT_LISTENER(i) (revents[(i)].data.ptr)
 220
 221 # define SLAP_EVENT_FD(i)       SLAP_EV_PTRFD(revents[(i)].data.ptr)
 222
 223 # define SLAP_SOCK_SET_INIT do { \
 224         slap_daemon.sd_epolls = ch_calloc(1, \
 225                 sizeof(struct epoll_event) * dtblsize * 2); \
 226         slap_daemon.sd_index = ch_malloc(sizeof(int) * dtblsize); \
 227         slap_daemon.sd_epfd = epoll_create( dtblsize ); \
 228         for (i=0; i<dtblsize; i++) slap_daemon.sd_index[i] = -1; \
 229 } while (0)
 230
 231 # define SLAP_EVENT_DECL struct epoll_event *revents
 232
 233 # define SLAP_EVENT_INIT do { \
 234         revents = slap_daemon.sd_epolls + dtblsize; \
 235 } while (0)
 236
 237 # define SLAP_EVENT_WAIT(tvp) \
 238         epoll_wait( slap_daemon.sd_epfd, revents, \
 239                 dtblsize, (tvp) ? (tvp)->tv_sec * 1000 : -1 )
 240
 241 #else
 242 /* select */
 243
 244 # define SLAP_EVENTS_ARE_INDEXED 1
 245 # define SLAP_EVENT_DECL        \
 246         fd_set readfds, writefds
 247
 248 # define SLAP_EVENT_INIT do { \
 249         AC_MEMCPY( &readfds, &slap_daemon.sd_readers, sizeof(fd_set) ); \
 250         if ( nwriters ) { \
 251                 AC_MEMCPY( &writefds, &slap_daemon.sd_writers, sizeof(fd_set) ); \
 252         } else { \
 253                 FD_ZERO( &writefds ); \
 254         } \
 255 } while (0)
 256
 257 # ifdef FD_SETSIZE
 258 #  define       CHK_SETSIZE do { \
 259         if (dtblsize > FD_SETSIZE) dtblsize = FD_SETSIZE; \
 260 } while (0)
 261 # else
 262 #  define        CHK_SETSIZE do { ; } while (0)
 263 # endif
 264
 265 # define        SLAP_SOCK_SET_INIT do { \
 266         CHK_SETSIZE; \
 267         FD_ZERO(&slap_daemon.sd_readers); \
 268         FD_ZERO(&slap_daemon.sd_writers); \
 269 } while (0)
 270
 271 # define SLAP_SOCK_IS_ACTIVE(fd)        FD_ISSET((fd), &slap_daemon.sd_actives)
 272 # define SLAP_SOCK_IS_READ(fd)          FD_ISSET((fd), &slap_daemon.sd_readers)
 273 # define SLAP_SOCK_IS_WRITE(fd)         FD_ISSET((fd), &slap_daemon.sd_writers)
 274
 275 # define SLAP_SOCK_NOT_ACTIVE(fd)       (!SLAP_SOCK_IS_ACTIVE(fd) && \
 276          !SLAP_SOCK_IS_READ(fd) && !SLAP_SOCK_IS_WRITE(fd))
 277
 278 # ifdef HAVE_WINSOCK
 279 #  define SLAP_SOCK_SET_READ(fd)        do { \
 280         if (!SLAP_SOCK_IS_READ(fd)) { FD_SET((fd), &slap_daemon.sd_readers); } \
 281 } while(0)
 282 #  define SLAP_SOCK_SET_WRITE(fd)       do { \
 283         if (!SLAP_SOCK_IS_WRITE(fd)) { FD_SET((fd), &slap_daemon.sd_writers); } \
 284 } while(0)
 285
 286 #  define SLAP_ADDTEST(s)       do { } while 0
 287 #  define SLAP_EVENT_MAX        dtblsize
 288 # else
 289 #  define SLAP_SOCK_SET_READ(fd)        FD_SET((fd), &slap_daemon.sd_readers)
 290 #  define SLAP_SOCK_SET_WRITE(fd)       FD_SET((fd), &slap_daemon.sd_writers)
 291
 292 #  define SLAP_EVENT_MAX        slap_daemon.sd_nfds
 293 #  define SLAP_ADDTEST(s)       do { \
 294         if ((s) >= slap_daemon.sd_nfds) slap_daemon.sd_nfds = (s)+1; \
 295 } while (0)
 296 # endif
 297
 298 # define SLAP_SOCK_CLR_READ(fd)         FD_CLR((fd), &slap_daemon.sd_readers)
 299 # define SLAP_SOCK_CLR_WRITE(fd)        FD_CLR((fd), &slap_daemon.sd_writers)
 300
 301 # define SLAP_ADD_SOCK(s, l) do { \
 302         SLAP_ADDTEST((s)); \
 303         FD_SET((s), &slap_daemon.sd_actives); \
 304         FD_SET((s), &slap_daemon.sd_readers); \
 305 } while(0)
 306
 307 # define SLAP_DEL_SOCK(s) do { \
 308         FD_CLR((s), &slap_daemon.sd_actives); \
 309         FD_CLR((s), &slap_daemon.sd_readers); \
 310         FD_CLR((s), &slap_daemon.sd_writers); \
 311 } while(0)
 312
 313 # define SLAP_EVENT_IS_READ(fd)         FD_ISSET((fd), &readfds)
 314 # define SLAP_EVENT_IS_WRITE(fd)        FD_ISSET((fd), &writefds)
 315
 316 # define SLAP_EVENT_CLR_READ(fd)        FD_CLR((fd), &readfds)
 317 # define SLAP_EVENT_CLR_WRITE(fd)       FD_CLR((fd), &writefds)
 318
 319 # define SLAP_EVENT_WAIT(tvp) \
 320         select( SLAP_EVENT_MAX, &readfds, \
 321                 nwriters > 0 ? &writefds : NULL, NULL, (tvp) )
 322 #endif
 323
 324 #ifdef HAVE_SLP
 325 /*
 326  * SLP related functions
 327  */
 328 #include <slp.h>
 329
 330 #define LDAP_SRVTYPE_PREFIX "service:ldap://"
 331 #define LDAPS_SRVTYPE_PREFIX "service:ldaps://"
 332 static char** slapd_srvurls = NULL;
 333 static SLPHandle slapd_hslp = 0;
 334 int slapd_register_slp = 0;
 335
 336 void slapd_slp_init( const char* urls ) {
 337         int i;
 338
 339         slapd_srvurls = ldap_str2charray( urls, " " );
 340
 341         if( slapd_srvurls == NULL ) return;
 342
 343         /* find and expand INADDR_ANY URLs */
 344         for( i=0; slapd_srvurls[i] != NULL; i++ ) {
 345                 if( strcmp( slapd_srvurls[i], "ldap:///" ) == 0) {
 346                         char *host = ldap_pvt_get_fqdn( NULL );
 347                         if ( host != NULL ) {
 348                                 slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i],
 349                                         strlen( host ) +
 350                                         sizeof( LDAP_SRVTYPE_PREFIX ) );
 351                                 strcpy( lutil_strcopy(slapd_srvurls[i],
 352                                         LDAP_SRVTYPE_PREFIX ), host );
 353
 354                                 ch_free( host );
 355                         }
 356
 357                 } else if ( strcmp( slapd_srvurls[i], "ldaps:///" ) == 0) {
 358                         char *host = ldap_pvt_get_fqdn( NULL );
 359                         if ( host != NULL ) {
 360                                 slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i],
 361                                         strlen( host ) +
 362                                         sizeof( LDAPS_SRVTYPE_PREFIX ) );
 363                                 strcpy( lutil_strcopy(slapd_srvurls[i],
 364                                         LDAPS_SRVTYPE_PREFIX ), host );
 365
 366                                 ch_free( host );
 367                         }
 368                 }
 369         }
 370
 371         /* open the SLP handle */
 372         SLPOpen( "en", 0, &slapd_hslp );
 373 }
 374
 375 void slapd_slp_deinit() {
 376         if( slapd_srvurls == NULL ) return;
 377
 378         ldap_charray_free( slapd_srvurls );
 379         slapd_srvurls = NULL;
 380
 381         /* close the SLP handle */
 382         SLPClose( slapd_hslp );
 383 }
 384
 385 void slapd_slp_regreport(
 386         SLPHandle hslp,
 387         SLPError errcode,
 388         void* cookie )
 389 {
 390         /* empty report */
 391 }
 392
 393 void slapd_slp_reg() {
 394         int i;
 395
 396         if( slapd_srvurls == NULL ) return;
 397
 398         for( i=0; slapd_srvurls[i] != NULL; i++ ) {
 399                 if( strncmp( slapd_srvurls[i], LDAP_SRVTYPE_PREFIX,
 400                                 sizeof( LDAP_SRVTYPE_PREFIX ) - 1 ) == 0 ||
 401                     strncmp( slapd_srvurls[i], LDAPS_SRVTYPE_PREFIX,
 402                                 sizeof( LDAPS_SRVTYPE_PREFIX ) - 1 ) == 0 )
 403                 {
 404                         SLPReg( slapd_hslp,
 405                                 slapd_srvurls[i],
 406                                 SLP_LIFETIME_MAXIMUM,
 407                                 "ldap",
 408                                 "",
 409                                 1,
 410                                 slapd_slp_regreport,
 411                                 NULL );
 412                 }
 413         }
 414 }
 415
 416 void slapd_slp_dereg() {
 417         int i;
 418
 419         if( slapd_srvurls == NULL ) return;
 420
 421         for( i=0; slapd_srvurls[i] != NULL; i++ ) {
 422                 SLPDereg( slapd_hslp,
 423                         slapd_srvurls[i],
 424                         slapd_slp_regreport,
 425                         NULL );
 426         }
 427 }
 428 #endif /* HAVE_SLP */
 429
 430 /*
 431  * Add a descriptor to daemon control
 432  *
 433  * If isactive, the descriptor is a live server session and is subject
 434  * to idletimeout control. Otherwise, the descriptor is a passive
 435  * listener or an outbound client session, and not subject to
 436  * idletimeout. The underlying event handler may record the Listener
 437  * argument to differentiate Listener's from real sessions.
 438  */
 439 static void slapd_add(ber_socket_t s, int isactive, Listener *sl) {
 440         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 441
 442         assert( SLAP_SOCK_NOT_ACTIVE(s) );
 443
 444         if ( isactive ) slap_daemon.sd_nactives++;
 445
 446         SLAP_ADD_SOCK(s, sl);
 447
 448         Debug( LDAP_DEBUG_CONNS, "daemon: added %ldr\n",
 449                 (long) s, 0, 0 );
 450
 451         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 452
 453 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 454         WAKE_LISTENER(1);
 455 #endif
 456 }
 457
 458 void slapd_sd_lock()
 459 {
 460         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 461 }
 462
 463 void slapd_sd_unlock()
 464 {
 465         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 466 }
 467
 468 /*
 469  * Remove the descriptor from daemon control
 470  */
 471 void slapd_remove(
 472         ber_socket_t s,
 473         int wasactive,
 474         int wake,
 475         int locked )
 476 {
 477         int waswriter;
 478         int wasreader;
 479
 480         if ( !locked )
 481                 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 482
 483         assert( SLAP_SOCK_IS_ACTIVE( s ));
 484
 485         if ( wasactive ) slap_daemon.sd_nactives--;
 486
 487         waswriter = SLAP_SOCK_IS_WRITE(s);
 488         wasreader = SLAP_SOCK_IS_READ(s);
 489
 490         Debug( LDAP_DEBUG_CONNS, "daemon: removing %ld%s%s\n",
 491                 (long) s,
 492                 wasreader ? "r" : "",
 493                 waswriter ? "w" : "" );
 494
 495         if ( waswriter ) slap_daemon.sd_nwriters--;
 496
 497         SLAP_DEL_SOCK(s);
 498
 499         /* If we ran out of file descriptors, we dropped a listener from
 500          * the select() loop. Now that we're removing a session from our
 501          * control, we can try to resume a dropped listener to use.
 502          */
 503         if ( emfile ) {
 504                 int i;
 505                 for ( i = 0; slap_listeners[i] != NULL; i++ ) {
 506                         Listener *lr = slap_listeners[i];
 507
 508                         if ( lr->sl_sd == AC_SOCKET_INVALID ) continue;
 509                         if ( lr->sl_sd == s ) continue;
 510                         if ( lr->sl_mute ) {
 511                                 lr->sl_mute = 0;
 512                                 emfile--;
 513                                 break;
 514                         }
 515                 }
 516                 /* Walked the entire list without enabling anything; emfile
 517                  * counter is stale. Reset it.
 518                  */
 519                 if ( slap_listeners[i] == NULL ) emfile = 0;
 520         }
 521         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 522         WAKE_LISTENER(wake || slapd_gentle_shutdown == 2);
 523 }
 524
 525 void slapd_clr_write(ber_socket_t s, int wake) {
 526         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 527
 528         assert( SLAP_SOCK_IS_ACTIVE( s ));
 529
 530         if ( SLAP_SOCK_IS_WRITE( s )) {
 531                 SLAP_SOCK_CLR_WRITE( s );
 532                 slap_daemon.sd_nwriters--;
 533         }
 534
 535         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 536         WAKE_LISTENER(wake);
 537 }
 538
 539 void slapd_set_write(ber_socket_t s, int wake) {
 540         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 541
 542         assert( SLAP_SOCK_IS_ACTIVE( s ));
 543
 544         if ( !SLAP_SOCK_IS_WRITE( s )) {
 545                 SLAP_SOCK_SET_WRITE( s );
 546                 slap_daemon.sd_nwriters++;
 547         }
 548
 549         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 550         WAKE_LISTENER(wake);
 551 }
 552
 553 int slapd_clr_read(ber_socket_t s, int wake) {
 554         int rc = 1;
 555         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 556
 557         if ( SLAP_SOCK_IS_ACTIVE( s )) {
 558                 SLAP_SOCK_CLR_READ( s );
 559                 rc = 0;
 560         }
 561         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 562         if ( !rc )
 563                 WAKE_LISTENER(wake);
 564         return rc;
 565 }
 566
 567 void slapd_set_read(ber_socket_t s, int wake) {
 568         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 569
 570         assert( SLAP_SOCK_IS_ACTIVE( s ));
 571         if (!SLAP_SOCK_IS_READ( s )) SLAP_SOCK_SET_READ( s );
 572
 573         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 574         WAKE_LISTENER(wake);
 575 }
 576
 577 static void slapd_close(ber_socket_t s) {
 578         Debug( LDAP_DEBUG_CONNS, "daemon: closing %ld\n",
 579                 (long) s, 0, 0 );
 580         tcp_close(s);
 581 }
 582
 583 static void slap_free_listener_addresses(struct sockaddr **sal) {
 584         struct sockaddr **sap;
 585         if (sal == NULL) return;
 586         for (sap = sal; *sap != NULL; sap++) ch_free(*sap);
 587         ch_free(sal);
 588 }
 589
 590 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
 591 static int get_url_perms(
 592         char    **exts,
 593         mode_t  *perms,
 594         int     *crit )
 595 {
 596         int     i;
 597
 598         assert( exts != NULL );
 599         assert( perms != NULL );
 600         assert( crit != NULL );
 601
 602         *crit = 0;
 603         for ( i = 0; exts[ i ]; i++ ) {
 604                 char    *type = exts[ i ];
 605                 int     c = 0;
 606
 607                 if ( type[ 0 ] == '!' ) {
 608                         c = 1;
 609                         type++;
 610                 }
 611
 612                 if ( strncasecmp( type, LDAPI_MOD_URLEXT "=",
 613                         sizeof(LDAPI_MOD_URLEXT "=") - 1 ) == 0 )
 614                 {
 615                         char *value = type + ( sizeof(LDAPI_MOD_URLEXT "=") - 1 );
 616                         mode_t p = 0;
 617                         int j;
 618
 619                         switch (strlen(value)) {
 620                         case 4:
 621                                 /* skip leading '0' */
 622                                 if ( value[ 0 ] != '0' ) return LDAP_OTHER;
 623                                 value++;
 624
 625                         case 3:
 626                                 for ( j = 0; j < 3; j++) {
 627                                         int     v;
 628
 629                                         v = value[ j ] - '0';
 630
 631                                         if ( v < 0 || v > 7 ) return LDAP_OTHER;
 632
 633                                         p |= v << 3*(2-j);
 634                                 }
 635                                 break;
 636
 637                         case 10:
 638                                 for ( j = 1; j < 10; j++ ) {
 639                                         static mode_t   m[] = { 0,
 640                                                 S_IRUSR, S_IWUSR, S_IXUSR,
 641                                                 S_IRGRP, S_IWGRP, S_IXGRP,
 642                                                 S_IROTH, S_IWOTH, S_IXOTH
 643                                         };
 644                                         static char     c[] = "-rwxrwxrwx";
 645
 646                                         if ( value[ j ] == c[ j ] ) {
 647                                                 p |= m[ j ];
 648
 649                                         } else if ( value[ j ] != '-' ) {
 650                                                 return LDAP_OTHER;
 651                                         }
 652                                 }
 653                                 break;
 654
 655                         default:
 656                                 return LDAP_OTHER;
 657                         }
 658
 659                         *crit = c;
 660                         *perms = p;
 661
 662                         return LDAP_SUCCESS;
 663                 }
 664         }
 665
 666         return LDAP_OTHER;
 667 }
 668 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
 669
 670 /* port = 0 indicates AF_LOCAL */
 671 static int slap_get_listener_addresses(
 672         const char *host,
 673         unsigned short port,
 674         struct sockaddr ***sal)
 675 {
 676         struct sockaddr **sap;
 677
 678 #ifdef LDAP_PF_LOCAL
 679         if ( port == 0 ) {
 680                 *sal = ch_malloc(2 * sizeof(void *));
 681                 if (*sal == NULL) return -1;
 682
 683                 sap = *sal;
 684                 *sap = ch_malloc(sizeof(struct sockaddr_un));
 685                 if (*sap == NULL) goto errexit;
 686                 sap[1] = NULL;
 687
 688                 if ( strlen(host) >
 689                         (sizeof(((struct sockaddr_un *)*sap)->sun_path) - 1) )
 690                 {
 691                         Debug( LDAP_DEBUG_ANY,
 692                                 "daemon: domain socket path (%s) too long in URL",
 693                                 host, 0, 0);
 694                         goto errexit;
 695                 }
 696
 697                 (void)memset( (void *)*sap, '\0', sizeof(struct sockaddr_un) );
 698                 (*sap)->sa_family = AF_LOCAL;
 699                 strcpy( ((struct sockaddr_un *)*sap)->sun_path, host );
 700         } else
 701 #endif
 702         {
 703 #ifdef HAVE_GETADDRINFO
 704                 struct addrinfo hints, *res, *sai;
 705                 int n, err;
 706                 char serv[7];
 707
 708                 memset( &hints, '\0', sizeof(hints) );
 709                 hints.ai_flags = AI_PASSIVE;
 710                 hints.ai_socktype = SOCK_STREAM;
 711                 hints.ai_family = slap_inet4or6;
 712                 snprintf(serv, sizeof serv, "%d", port);
 713
 714                 if ( (err = getaddrinfo(host, serv, &hints, &res)) ) {
 715                         Debug( LDAP_DEBUG_ANY, "daemon: getaddrinfo() failed: %s\n",
 716                                 AC_GAI_STRERROR(err), 0, 0);
 717                         return -1;
 718                 }
 719
 720                 sai = res;
 721                 for (n=2; (sai = sai->ai_next) != NULL; n++) {
 722                         /* EMPTY */ ;
 723                 }
 724                 *sal = ch_calloc(n, sizeof(void *));
 725                 if (*sal == NULL) return -1;
 726
 727                 sap = *sal;
 728                 *sap = NULL;
 729
 730                 for ( sai=res; sai; sai=sai->ai_next ) {
 731                         if( sai->ai_addr == NULL ) {
 732                                 Debug( LDAP_DEBUG_ANY, "slap_get_listener_addresses: "
 733                                         "getaddrinfo ai_addr is NULL?\n", 0, 0, 0 );
 734                                 freeaddrinfo(res);
 735                                 goto errexit;
 736                         }
 737
 738                         switch (sai->ai_family) {
 739 #  ifdef LDAP_PF_INET6
 740                         case AF_INET6:
 741                                 *sap = ch_malloc(sizeof(struct sockaddr_in6));
 742                                 if (*sap == NULL) {
 743                                         freeaddrinfo(res);
 744                                         goto errexit;
 745                                 }
 746                                 *(struct sockaddr_in6 *)*sap =
 747                                         *((struct sockaddr_in6 *)sai->ai_addr);
 748                                 break;
 749 #  endif
 750                         case AF_INET:
 751                                 *sap = ch_malloc(sizeof(struct sockaddr_in));
 752                                 if (*sap == NULL) {
 753                                         freeaddrinfo(res);
 754                                         goto errexit;
 755                                 }
 756                                 *(struct sockaddr_in *)*sap =
 757                                         *((struct sockaddr_in *)sai->ai_addr);
 758                                 break;
 759                         default:
 760                                 *sap = NULL;
 761                                 break;
 762                         }
 763
 764                         if (*sap != NULL) {
 765                                 (*sap)->sa_family = sai->ai_family;
 766                                 sap++;
 767                                 *sap = NULL;
 768                         }
 769                 }
 770
 771                 freeaddrinfo(res);
 772
 773 #else
 774                 int i, n = 1;
 775                 struct in_addr in;
 776                 struct hostent *he = NULL;
 777
 778                 if ( host == NULL ) {
 779                         in.s_addr = htonl(INADDR_ANY);
 780
 781                 } else if ( !inet_aton( host, &in ) ) {
 782                         he = gethostbyname( host );
 783                         if( he == NULL ) {
 784                                 Debug( LDAP_DEBUG_ANY,
 785                                         "daemon: invalid host %s", host, 0, 0);
 786                                 return -1;
 787                         }
 788                         for (n = 0; he->h_addr_list[n]; n++) /* empty */;
 789                 }
 790
 791                 *sal = ch_malloc((n+1) * sizeof(void *));
 792                 if (*sal == NULL) return -1;
 793
 794                 sap = *sal;
 795                 for ( i = 0; i<n; i++ ) {
 796                         sap[i] = ch_malloc(sizeof(struct sockaddr_in));
 797                         if (*sap == NULL) goto errexit;
 798
 799                         (void)memset( (void *)sap[i], '\0', sizeof(struct sockaddr_in) );
 800                         sap[i]->sa_family = AF_INET;
 801                         ((struct sockaddr_in *)sap[i])->sin_port = htons(port);
 802                         AC_MEMCPY( &((struct sockaddr_in *)sap[i])->sin_addr,
 803                                 he ? he->h_addr_list[i] : &in, sizeof(struct in_addr) );
 804                 }
 805                 sap[i] = NULL;
 806 #endif
 807         }
 808
 809         return 0;
 810
 811 errexit:
 812         slap_free_listener_addresses(*sal);
 813         return -1;
 814 }
 815
 816 static int slap_open_listener(
 817         const char* url,
 818         int *listeners,
 819         int *cur
 820         )
 821 {
 822         int     num, tmp, rc;
 823         Listener l;
 824         Listener *li;
 825         LDAPURLDesc *lud;
 826         unsigned short port;
 827         int err, addrlen = 0;
 828         struct sockaddr **sal, **psal;
 829         int socktype = SOCK_STREAM;     /* default to COTS */
 830
 831 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
 832         /*
 833          * use safe defaults
 834          */
 835         int     crit = 1;
 836 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
 837
 838         rc = ldap_url_parse( url, &lud );
 839
 840         if( rc != LDAP_URL_SUCCESS ) {
 841                 Debug( LDAP_DEBUG_ANY,
 842                         "daemon: listen URL \"%s\" parse error=%d\n",
 843                         url, rc, 0 );
 844                 return rc;
 845         }
 846
 847         l.sl_url.bv_val = NULL;
 848         l.sl_mute = 0;
 849 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 850         l.sl_busy = 0;
 851 #endif
 852
 853 #ifndef HAVE_TLS
 854         if( ldap_pvt_url_scheme2tls( lud->lud_scheme ) ) {
 855                 Debug( LDAP_DEBUG_ANY, "daemon: TLS not supported (%s)\n",
 856                         url, 0, 0 );
 857                 ldap_free_urldesc( lud );
 858                 return -1;
 859         }
 860
 861         if(! lud->lud_port ) lud->lud_port = LDAP_PORT;
 862
 863 #else
 864         l.sl_is_tls = ldap_pvt_url_scheme2tls( lud->lud_scheme );
 865
 866         if(! lud->lud_port ) {
 867                 lud->lud_port = l.sl_is_tls ? LDAPS_PORT : LDAP_PORT;
 868         }
 869 #endif
 870
 871         port = (unsigned short) lud->lud_port;
 872
 873         tmp = ldap_pvt_url_scheme2proto(lud->lud_scheme);
 874         if ( tmp == LDAP_PROTO_IPC ) {
 875 #ifdef LDAP_PF_LOCAL
 876                 if ( lud->lud_host == NULL || lud->lud_host[0] == '\0' ) {
 877                         err = slap_get_listener_addresses(LDAPI_SOCK, 0, &sal);
 878                 } else {
 879                         err = slap_get_listener_addresses(lud->lud_host, 0, &sal);
 880                 }
 881 #else
 882
 883                 Debug( LDAP_DEBUG_ANY, "daemon: URL scheme not supported: %s",
 884                         url, 0, 0);
 885                 ldap_free_urldesc( lud );
 886                 return -1;
 887 #endif
 888         } else {
 889                 if( lud->lud_host == NULL || lud->lud_host[0] == '\0'
 890                         || strcmp(lud->lud_host, "*") == 0 )
 891                 {
 892                         err = slap_get_listener_addresses(NULL, port, &sal);
 893                 } else {
 894                         err = slap_get_listener_addresses(lud->lud_host, port, &sal);
 895                 }
 896         }
 897
 898 #ifdef LDAP_CONNECTIONLESS
 899         l.sl_is_udp = ( tmp == LDAP_PROTO_UDP );
 900 #endif
 901
 902 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
 903         if ( lud->lud_exts ) {
 904                 err = get_url_perms( lud->lud_exts, &l.sl_perms, &crit );
 905         } else {
 906                 l.sl_perms = S_IRWXU | S_IRWXO;
 907         }
 908 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
 909
 910         ldap_free_urldesc( lud );
 911         if ( err ) return -1;
 912
 913         /* If we got more than one address returned, we need to make space
 914          * for it in the slap_listeners array.
 915          */
 916         for ( num=0; sal[num]; num++ ) /* empty */;
 917         if ( num > 1 ) {
 918                 *listeners += num-1;
 919                 slap_listeners = ch_realloc( slap_listeners,
 920                         (*listeners + 1) * sizeof(Listener *) );
 921         }
 922
 923         psal = sal;
 924         while ( *sal != NULL ) {
 925                 char *af;
 926                 switch( (*sal)->sa_family ) {
 927                 case AF_INET:
 928                         af = "IPv4";
 929                         break;
 930 #ifdef LDAP_PF_INET6
 931                 case AF_INET6:
 932                         af = "IPv6";
 933                         break;
 934 #endif
 935 #ifdef LDAP_PF_LOCAL
 936                 case AF_LOCAL:
 937                         af = "Local";
 938                         break;
 939 #endif
 940                 default:
 941                         sal++;
 942                         continue;
 943                 }
 944
 945 #ifdef LDAP_CONNECTIONLESS
 946                 if( l.sl_is_udp ) socktype = SOCK_DGRAM;
 947 #endif
 948
 949                 l.sl_sd = socket( (*sal)->sa_family, socktype, 0);
 950                 if ( l.sl_sd == AC_SOCKET_INVALID ) {
 951                         int err = sock_errno();
 952                         Debug( LDAP_DEBUG_ANY,
 953                                 "daemon: %s socket() failed errno=%d (%s)\n",
 954                                 af, err, sock_errstr(err) );
 955                         sal++;
 956                         continue;
 957                 }
 958
 959 #ifndef HAVE_WINSOCK
 960                 if ( l.sl_sd >= dtblsize ) {
 961                         Debug( LDAP_DEBUG_ANY,
 962                                 "daemon: listener descriptor %ld is too great %ld\n",
 963                                 (long) l.sl_sd, (long) dtblsize, 0 );
 964                         tcp_close( l.sl_sd );
 965                         sal++;
 966                         continue;
 967                 }
 968 #endif
 969
 970 #ifdef LDAP_PF_LOCAL
 971                 if ( (*sal)->sa_family == AF_LOCAL ) {
 972                         unlink( ((struct sockaddr_un *)*sal)->sun_path );
 973                 } else
 974 #endif
 975                 {
 976 #ifdef SO_REUSEADDR
 977                         /* enable address reuse */
 978                         tmp = 1;
 979                         rc = setsockopt( l.sl_sd, SOL_SOCKET, SO_REUSEADDR,
 980                                 (char *) &tmp, sizeof(tmp) );
 981                         if ( rc == AC_SOCKET_ERROR ) {
 982                                 int err = sock_errno();
 983                                 Debug( LDAP_DEBUG_ANY, "slapd(%ld): "
 984                                         "setsockopt(SO_REUSEADDR) failed errno=%d (%s)\n",
 985                                         (long) l.sl_sd, err, sock_errstr(err) );
 986                         }
 987 #endif
 988                 }
 989
 990                 switch( (*sal)->sa_family ) {
 991                 case AF_INET:
 992                         addrlen = sizeof(struct sockaddr_in);
 993                         break;
 994 #ifdef LDAP_PF_INET6
 995                 case AF_INET6:
 996 #ifdef IPV6_V6ONLY
 997                         /* Try to use IPv6 sockets for IPv6 only */
 998                         tmp = 1;
 999                         rc = setsockopt( l.sl_sd, IPPROTO_IPV6, IPV6_V6ONLY,
1000                                 (char *) &tmp, sizeof(tmp) );
1001                         if ( rc == AC_SOCKET_ERROR ) {
1002                                 int err = sock_errno();
1003                                 Debug( LDAP_DEBUG_ANY, "slapd(%ld): "
1004                                         "setsockopt(IPV6_V6ONLY) failed errno=%d (%s)\n",
1005                                         (long) l.sl_sd, err, sock_errstr(err) );
1006                         }
1007 #endif
1008                         addrlen = sizeof(struct sockaddr_in6);
1009                         break;
1010 #endif
1011
1012 #ifdef LDAP_PF_LOCAL
1013                 case AF_LOCAL:
1014 #ifdef LOCAL_CREDS
1015                 {
1016                         int one = 1;
1017                         setsockopt(l.sl_sd, 0, LOCAL_CREDS, &one, sizeof one);
1018                 }
1019 #endif
1020                 addrlen = sizeof(struct sockaddr_un);
1021                 break;
1022 #endif
1023                 }
1024
1025                 if (bind(l.sl_sd, *sal, addrlen)) {
1026                         err = sock_errno();
1027                         Debug( LDAP_DEBUG_ANY,
1028                                 "daemon: bind(%ld) failed errno=%d (%s)\n",
1029                                 (long) l.sl_sd, err, sock_errstr(err) );
1030                         tcp_close( l.sl_sd );
1031                         sal++;
1032                         continue;
1033                 }
1034
1035                 switch ( (*sal)->sa_family ) {
1036 #ifdef LDAP_PF_LOCAL
1037                 case AF_LOCAL: {
1038                         char *addr = ((struct sockaddr_un *)*sal)->sun_path;
1039                         l.sl_name.bv_len = strlen(addr) + sizeof("PATH=") - 1;
1040                         l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len + 1 );
1041                         snprintf( l.sl_name.bv_val, l.sl_name.bv_len + 1,
1042                                 "PATH=%s", addr );
1043                 } break;
1044 #endif /* LDAP_PF_LOCAL */
1045
1046                 case AF_INET: {
1047                         char *s;
1048 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
1049                         char addr[INET_ADDRSTRLEN];
1050                         inet_ntop( AF_INET, &((struct sockaddr_in *)*sal)->sin_addr,
1051                                 addr, sizeof(addr) );
1052                         s = addr;
1053 #else
1054                         s = inet_ntoa( ((struct sockaddr_in *) *sal)->sin_addr );
1055 #endif
1056                         port = ntohs( ((struct sockaddr_in *)*sal) ->sin_port );
1057                         l.sl_name.bv_val =
1058                                 ber_memalloc( sizeof("IP=255.255.255.255:65535") );
1059                         snprintf( l.sl_name.bv_val, sizeof("IP=255.255.255.255:65535"),
1060                                 "IP=%s:%d",
1061                                  s != NULL ? s : SLAP_STRING_UNKNOWN, port );
1062                         l.sl_name.bv_len = strlen( l.sl_name.bv_val );
1063                 } break;
1064
1065 #ifdef LDAP_PF_INET6
1066                 case AF_INET6: {
1067                         char addr[INET6_ADDRSTRLEN];
1068                         inet_ntop( AF_INET6, &((struct sockaddr_in6 *)*sal)->sin6_addr,
1069                                 addr, sizeof addr);
1070                         port = ntohs( ((struct sockaddr_in6 *)*sal)->sin6_port );
1071                         l.sl_name.bv_len = strlen(addr) + sizeof("IP= 65535");
1072                         l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len );
1073                         snprintf( l.sl_name.bv_val, l.sl_name.bv_len, "IP=%s %d",
1074                                 addr, port );
1075                         l.sl_name.bv_len = strlen( l.sl_name.bv_val );
1076                 } break;
1077 #endif /* LDAP_PF_INET6 */
1078
1079                 default:
1080                         Debug( LDAP_DEBUG_ANY, "daemon: unsupported address family (%d)\n",
1081                                 (int) (*sal)->sa_family, 0, 0 );
1082                         break;
1083                 }
1084
1085                 AC_MEMCPY(&l.sl_sa, *sal, addrlen);
1086                 ber_str2bv( url, 0, 1, &l.sl_url);
1087                 li = ch_malloc( sizeof( Listener ) );
1088                 *li = l;
1089                 slap_listeners[*cur] = li;
1090                 (*cur)++;
1091                 sal++;
1092         }
1093
1094         slap_free_listener_addresses(psal);
1095
1096         if ( l.sl_url.bv_val == NULL ) {
1097                 Debug( LDAP_DEBUG_TRACE,
1098                         "slap_open_listener: failed on %s\n", url, 0, 0 );
1099                 return -1;
1100         }
1101
1102 #ifdef LDAP_CONNECTIONLESS
1103         if( l.sl_is_udp ) {
1104                 long id = connection_init( l.sl_sd, &l, "", "", CONN_IS_UDP,
1105                         (slap_ssf_t) 0, NULL );
1106
1107                 if( id < 0 ) {
1108                         Debug( LDAP_DEBUG_TRACE,
1109                                 "slap_open_listener: connectionless init failed on %s (%d)\n",
1110                                 url, l.sl_sd, 0 );
1111                         return -1;
1112                 }
1113                 l.sl_is_udp++;
1114         }
1115 #endif
1116
1117         Debug( LDAP_DEBUG_TRACE, "daemon: listener initialized %s\n",
1118                 l.sl_url.bv_val, 0, 0 );
1119         return 0;
1120 }
1121
1122 static int sockinit(void);
1123 static int sockdestroy(void);
1124
1125 int slapd_daemon_init( const char *urls )
1126 {
1127         int i, j, n, rc;
1128         char **u;
1129
1130         Debug( LDAP_DEBUG_ARGS, "daemon_init: %s\n",
1131                 urls ? urls : "<null>", 0, 0 );
1132         if( (rc = sockinit()) != 0 ) return rc;
1133
1134 #ifdef HAVE_SYSCONF
1135         dtblsize = sysconf( _SC_OPEN_MAX );
1136 #elif HAVE_GETDTABLESIZE
1137         dtblsize = getdtablesize();
1138 #else
1139         dtblsize = FD_SETSIZE;
1140 #endif
1141
1142         /* open a pipe (or something equivalent connected to itself).
1143          * we write a byte on this fd whenever we catch a signal. The main
1144          * loop will be select'ing on this socket, and will wake up when
1145          * this byte arrives.
1146          */
1147         if( (rc = lutil_pair( wake_sds )) < 0 ) {
1148                 Debug( LDAP_DEBUG_ANY,
1149                         "daemon: lutil_pair() failed rc=%d\n", rc, 0, 0 );
1150                 return rc;
1151         }
1152
1153         SLAP_SOCK_SET_INIT;
1154
1155         if( urls == NULL ) urls = "ldap:///";
1156
1157         u = ldap_str2charray( urls, " " );
1158
1159         if( u == NULL || u[0] == NULL ) {
1160                 Debug( LDAP_DEBUG_ANY, "daemon_init: no urls (%s) provided.\n",
1161                         urls, 0, 0 );
1162                 return -1;
1163         }
1164
1165         for( i=0; u[i] != NULL; i++ ) {
1166                 Debug( LDAP_DEBUG_TRACE, "daemon_init: listen on %s\n",
1167                         u[i], 0, 0 );
1168         }
1169
1170         if( i == 0 ) {
1171                 Debug( LDAP_DEBUG_ANY, "daemon_init: no listeners to open (%s)\n",
1172                         urls, 0, 0 );
1173                 ldap_charray_free( u );
1174                 return -1;
1175         }
1176
1177         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners to open...\n",
1178                 i, 0, 0 );
1179         slap_listeners = ch_malloc( (i+1)*sizeof(Listener *) );
1180
1181         for(n = 0, j = 0; u[n]; n++ ) {
1182                 if ( slap_open_listener( u[n], &i, &j ) ) {
1183                         ldap_charray_free( u );
1184                         return -1;
1185                 }
1186         }
1187         slap_listeners[j] = NULL;
1188
1189         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners opened\n",
1190                 i, 0, 0 );
1191
1192
1193 #ifdef HAVE_SLP
1194         if( slapd_register_slp ) {
1195                 slapd_slp_init( urls );
1196                 slapd_slp_reg();
1197         }
1198 #endif
1199
1200         ldap_charray_free( u );
1201         ldap_pvt_thread_mutex_init( &slap_daemon.sd_mutex );
1202
1203 #ifdef HAVE_TCPD
1204         ldap_pvt_thread_mutex_init( &slap_daemon.tcpd_mutex );
1205 #endif
1206
1207         return !i;
1208 }
1209
1210
1211 int
1212 slapd_daemon_destroy(void)
1213 {
1214         connections_destroy();
1215         tcp_close( wake_sds[1] );
1216         tcp_close( wake_sds[0] );
1217         sockdestroy();
1218
1219 #ifdef HAVE_SLP
1220         if( slapd_register_slp ) {
1221                 slapd_slp_dereg();
1222                 slapd_slp_deinit();
1223         }
1224 #endif
1225
1226 #ifdef HAVE_TCPD
1227         ldap_pvt_thread_mutex_destroy( &slap_daemon.tcpd_mutex );
1228 #endif
1229
1230         ldap_pvt_thread_mutex_destroy( &slap_daemon.sd_mutex );
1231         return 0;
1232 }
1233
1234
1235 static void
1236 close_listeners(
1237         int remove )
1238 {
1239         int l;
1240
1241         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1242                 Listener *lr = slap_listeners[l];
1243
1244                 if ( lr->sl_sd != AC_SOCKET_INVALID ) {
1245                         if ( remove ) slapd_remove( lr->sl_sd, 0, 0, 0 );
1246
1247 #ifdef LDAP_PF_LOCAL
1248                         if ( lr->sl_sa.sa_addr.sa_family == AF_LOCAL ) {
1249                                 unlink( lr->sl_sa.sa_un_addr.sun_path );
1250                         }
1251 #endif /* LDAP_PF_LOCAL */
1252
1253                         slapd_close( lr->sl_sd );
1254                 }
1255
1256                 if ( lr->sl_url.bv_val ) {
1257                         ber_memfree( lr->sl_url.bv_val );
1258                 }
1259
1260                 if ( lr->sl_name.bv_val ) {
1261                         ber_memfree( lr->sl_name.bv_val );
1262                 }
1263
1264                 free( lr );
1265                 slap_listeners[l] = NULL;
1266         }
1267 }
1268
1269 static int
1270 slap_listener(
1271         Listener *sl )
1272 {
1273         Sockaddr                from;
1274
1275         ber_socket_t s;
1276         socklen_t len = sizeof(from);
1277         long id;
1278         slap_ssf_t ssf = 0;
1279         struct berval authid = BER_BVNULL;
1280 #ifdef SLAPD_RLOOKUPS
1281         char hbuf[NI_MAXHOST];
1282 #endif
1283
1284         char    *dnsname = NULL;
1285         char    *peeraddr = NULL;
1286 #ifdef LDAP_PF_LOCAL
1287         char peername[MAXPATHLEN + sizeof("PATH=")];
1288 #elif defined(LDAP_PF_INET6)
1289         char peername[sizeof("IP=ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 65535")];
1290 #else
1291         char peername[sizeof("IP=255.255.255.255:65336")];
1292 #endif /* LDAP_PF_LOCAL */
1293
1294         peername[0] = '\0';
1295
1296 #ifdef LDAP_CONNECTIONLESS
1297         if ( sl->sl_is_udp ) return 1;
1298 #endif
1299
1300 #  ifdef LDAP_PF_LOCAL
1301         /* FIXME: apparently accept doesn't fill
1302          * the sun_path sun_path member */
1303         from.sa_un_addr.sun_path[0] = '\0';
1304 #  endif /* LDAP_PF_LOCAL */
1305
1306         s = accept( sl->sl_sd, (struct sockaddr *) &from, &len );
1307
1308 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1309         /* Resume the listener FD to allow concurrent-processing of
1310          * additional incoming connections.
1311          */
1312         sl->sl_busy = 0;
1313         WAKE_LISTENER(1);
1314 #endif
1315
1316         if ( s == AC_SOCKET_INVALID ) {
1317                 int err = sock_errno();
1318
1319                 if(
1320 #ifdef EMFILE
1321                     err == EMFILE ||
1322 #endif
1323 #ifdef ENFILE
1324                     err == ENFILE ||
1325 #endif
1326                     0 )
1327                 {
1328                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1329                         emfile++;
1330                         /* Stop listening until an existing session closes */
1331                         sl->sl_mute = 1;
1332                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1333                 }
1334
1335                 Debug( LDAP_DEBUG_ANY,
1336                         "daemon: accept(%ld) failed errno=%d (%s)\n",
1337                         (long) sl->sl_sd, err, sock_errstr(err) );
1338                 ldap_pvt_thread_yield();
1339                 return 0;
1340         }
1341
1342 #ifndef HAVE_WINSOCK
1343         /* make sure descriptor number isn't too great */
1344         if ( s >= dtblsize ) {
1345                 Debug( LDAP_DEBUG_ANY,
1346                         "daemon: %ld beyond descriptor table size %ld\n",
1347                         (long) s, (long) dtblsize, 0 );
1348
1349                 slapd_close(s);
1350                 ldap_pvt_thread_yield();
1351                 return 0;
1352         }
1353 #endif
1354
1355 #ifdef LDAP_DEBUG
1356         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1357         /* newly accepted stream should not be in any of the FD SETS */
1358         assert( SLAP_SOCK_NOT_ACTIVE( s ));
1359         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1360 #endif
1361
1362 #if defined( SO_KEEPALIVE ) || defined( TCP_NODELAY )
1363 #ifdef LDAP_PF_LOCAL
1364         /* for IPv4 and IPv6 sockets only */
1365         if ( from.sa_addr.sa_family != AF_LOCAL )
1366 #endif /* LDAP_PF_LOCAL */
1367         {
1368                 int rc;
1369                 int tmp;
1370 #ifdef SO_KEEPALIVE
1371                 /* enable keep alives */
1372                 tmp = 1;
1373                 rc = setsockopt( s, SOL_SOCKET, SO_KEEPALIVE,
1374                         (char *) &tmp, sizeof(tmp) );
1375                 if ( rc == AC_SOCKET_ERROR ) {
1376                         int err = sock_errno();
1377                         Debug( LDAP_DEBUG_ANY,
1378                                 "slapd(%ld): setsockopt(SO_KEEPALIVE) failed "
1379                                 "errno=%d (%s)\n", (long) s, err, sock_errstr(err) );
1380                 }
1381 #endif
1382 #ifdef TCP_NODELAY
1383                 /* enable no delay */
1384                 tmp = 1;
1385                 rc = setsockopt( s, IPPROTO_TCP, TCP_NODELAY,
1386                         (char *)&tmp, sizeof(tmp) );
1387                 if ( rc == AC_SOCKET_ERROR ) {
1388                         int err = sock_errno();
1389                         Debug( LDAP_DEBUG_ANY,
1390                                 "slapd(%ld): setsockopt(TCP_NODELAY) failed "
1391                                 "errno=%d (%s)\n", (long) s, err, sock_errstr(err) );
1392                 }
1393 #endif
1394         }
1395 #endif
1396
1397         Debug( LDAP_DEBUG_CONNS,
1398                 "daemon: listen=%ld, new connection on %ld\n",
1399                 (long) sl->sl_sd, (long) s, 0 );
1400
1401         switch ( from.sa_addr.sa_family ) {
1402 #  ifdef LDAP_PF_LOCAL
1403         case AF_LOCAL:
1404                 /* FIXME: apparently accept doesn't fill
1405                  * the sun_path sun_path member */
1406                 if ( from.sa_un_addr.sun_path[0] == '\0' ) {
1407                         AC_MEMCPY( from.sa_un_addr.sun_path,
1408                                         sl->sl_sa.sa_un_addr.sun_path,
1409                                         sizeof( from.sa_un_addr.sun_path ) );
1410                 }
1411
1412                 sprintf( peername, "PATH=%s", from.sa_un_addr.sun_path );
1413                 ssf = local_ssf;
1414                 {
1415                         uid_t uid;
1416                         gid_t gid;
1417
1418                         if( getpeereid( s, &uid, &gid ) == 0 ) {
1419                                 authid.bv_val = ch_malloc(
1420                                         STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
1421                                         "cn=peercred,cn=external,cn=auth" ) + 1 );
1422                                 authid.bv_len = sprintf( authid.bv_val,
1423                                         "gidNumber=%d+uidNumber=%d,"
1424                                         "cn=peercred,cn=external,cn=auth",
1425                                         (int) gid, (int) uid );
1426                                 assert( authid.bv_len <=
1427                                         STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
1428                                         "cn=peercred,cn=external,cn=auth" ) );
1429                         }
1430                 }
1431                 dnsname = "local";
1432                 break;
1433 #endif /* LDAP_PF_LOCAL */
1434
1435 #  ifdef LDAP_PF_INET6
1436         case AF_INET6:
1437         if ( IN6_IS_ADDR_V4MAPPED(&from.sa_in6_addr.sin6_addr) ) {
1438                 peeraddr = inet_ntoa( *((struct in_addr *)
1439                                         &from.sa_in6_addr.sin6_addr.s6_addr[12]) );
1440                 sprintf( peername, "IP=%s:%d",
1441                          peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1442                          (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
1443         } else {
1444                 char addr[INET6_ADDRSTRLEN];
1445
1446                 peeraddr = (char *) inet_ntop( AF_INET6,
1447                                       &from.sa_in6_addr.sin6_addr,
1448                                       addr, sizeof addr );
1449                 sprintf( peername, "IP=%s %d",
1450                          peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1451                          (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
1452         }
1453         break;
1454 #  endif /* LDAP_PF_INET6 */
1455
1456         case AF_INET:
1457         peeraddr = inet_ntoa( from.sa_in_addr.sin_addr );
1458         sprintf( peername, "IP=%s:%d",
1459                 peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1460                 (unsigned) ntohs( from.sa_in_addr.sin_port ) );
1461                 break;
1462
1463         default:
1464                 slapd_close(s);
1465                 return 0;
1466         }
1467
1468         if ( ( from.sa_addr.sa_family == AF_INET )
1469 #ifdef LDAP_PF_INET6
1470                 || ( from.sa_addr.sa_family == AF_INET6 )
1471 #endif
1472                 )
1473         {
1474                 dnsname = NULL;
1475 #ifdef SLAPD_RLOOKUPS
1476                 if ( use_reverse_lookup ) {
1477                         char *herr;
1478                         if (ldap_pvt_get_hname( (const struct sockaddr *)&from, len, hbuf,
1479                                 sizeof(hbuf), &herr ) == 0) {
1480                                 ldap_pvt_str2lower( hbuf );
1481                                 dnsname = hbuf;
1482                         }
1483                 }
1484 #endif /* SLAPD_RLOOKUPS */
1485
1486 #ifdef HAVE_TCPD
1487                 {
1488                         int rc;
1489                         ldap_pvt_thread_mutex_lock( &slap_daemon.tcpd_mutex );
1490                         rc = hosts_ctl("slapd",
1491                                 dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1492                                 peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1493                                 SLAP_STRING_UNKNOWN );
1494                         ldap_pvt_thread_mutex_unlock( &slap_daemon.tcpd_mutex );
1495                         if ( !rc ) {
1496                                 /* DENY ACCESS */
1497                                 Statslog( LDAP_DEBUG_STATS,
1498                                         "fd=%ld DENIED from %s (%s)\n",
1499                                         (long) s,
1500                                         dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1501                                         peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1502                                         0, 0 );
1503                                 slapd_close(s);
1504                                 return 0;
1505                         }
1506                 }
1507 #endif /* HAVE_TCPD */
1508         }
1509
1510         id = connection_init(s, sl,
1511                 dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1512                 peername,
1513 #ifdef HAVE_TLS
1514                 sl->sl_is_tls ? CONN_IS_TLS : 0,
1515 #else
1516                 0,
1517 #endif
1518                 ssf,
1519                 authid.bv_val ? &authid : NULL );
1520
1521         if( authid.bv_val ) ch_free(authid.bv_val);
1522
1523         if( id < 0 ) {
1524                 Debug( LDAP_DEBUG_ANY,
1525                         "daemon: connection_init(%ld, %s, %s) failed.\n",
1526                         (long) s, peername, sl->sl_name.bv_val );
1527                 slapd_close(s);
1528                 return 0;
1529         }
1530
1531         Statslog( LDAP_DEBUG_STATS,
1532                 "conn=%ld fd=%ld ACCEPT from %s (%s)\n",
1533                 id, (long) s, peername, sl->sl_name.bv_val,
1534                 0 );
1535
1536         return 0;
1537 }
1538
1539 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1540 static void*
1541 slap_listener_thread(
1542         void* ctx,
1543         void* ptr )
1544 {
1545         int rc;
1546
1547         rc = slap_listener( (Listener*)ptr );
1548
1549         if( rc != LDAP_SUCCESS ) {
1550                 Debug( LDAP_DEBUG_ANY,
1551                         "listener_thread: failed %d", rc, 0, 0 );
1552         }
1553
1554         return (void*)NULL;
1555 }
1556
1557 static int
1558 slap_listener_activate(
1559         Listener* sl )
1560 {
1561         int rc;
1562
1563         Debug( LDAP_DEBUG_TRACE, "slap_listener_activate(%d): %s\n",
1564                 sl->sl_sd, sl->sl_busy ? "busy" : "", 0 );
1565
1566         sl->sl_busy++;
1567
1568         rc = ldap_pvt_thread_pool_submit( &connection_pool,
1569                 slap_listener_thread, (void *) sl );
1570
1571         if( rc != 0 ) {
1572                 Debug( LDAP_DEBUG_ANY,
1573                         "listener_activate(%d): submit failed (%d)\n",
1574                         sl->sl_sd, rc, 0 );
1575         }
1576         return rc;
1577 }
1578 #endif
1579
1580 static void *
1581 slapd_daemon_task(
1582         void *ptr )
1583 {
1584         int l;
1585         time_t last_idle_check = 0;
1586         struct timeval idle;
1587         int ebadf = 0;
1588
1589 #define SLAPD_IDLE_CHECK_LIMIT 4
1590
1591         if ( global_idletimeout > 0 ) {
1592                 last_idle_check = slap_get_time();
1593                 /* Set the select timeout.
1594                  * Don't just truncate, preserve the fractions of
1595                  * seconds to prevent sleeping for zero time.
1596                  */
1597                 idle.tv_sec = global_idletimeout / SLAPD_IDLE_CHECK_LIMIT;
1598                 idle.tv_usec = global_idletimeout - \
1599                         ( idle.tv_sec * SLAPD_IDLE_CHECK_LIMIT );
1600                 idle.tv_usec *= 1000000 / SLAPD_IDLE_CHECK_LIMIT;
1601         } else {
1602                 idle.tv_sec = 0;
1603                 idle.tv_usec = 0;
1604         }
1605
1606         slapd_add( wake_sds[0], 0, NULL );
1607
1608         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1609                 if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) continue;
1610
1611 #ifdef LDAP_CONNECTIONLESS
1612                 /* Since this is connectionless, the data port is the
1613                  * listening port. The listen() and accept() calls
1614                  * are unnecessary.
1615                  */
1616                 if ( slap_listeners[l]->sl_is_udp ) {
1617                         slapd_add( slap_listeners[l]->sl_sd, 1, slap_listeners[l] );
1618                         continue;
1619                 }
1620 #endif
1621
1622                 if ( listen( slap_listeners[l]->sl_sd, SLAPD_LISTEN_BACKLOG ) == -1 ) {
1623                         int err = sock_errno();
1624
1625 #ifdef LDAP_PF_INET6
1626                         /* If error is EADDRINUSE, we are trying to listen to INADDR_ANY and
1627                          * we are already listening to in6addr_any, then we want to ignore
1628                          * this and continue.
1629                          */
1630                         if ( err == EADDRINUSE ) {
1631                                 int i;
1632                                 struct sockaddr_in sa = slap_listeners[l]->sl_sa.sa_in_addr;
1633                                 struct sockaddr_in6 sa6;
1634
1635                                 if ( sa.sin_family == AF_INET &&
1636                                      sa.sin_addr.s_addr == htonl(INADDR_ANY) ) {
1637                                         for ( i = 0 ; i < l; i++ ) {
1638                                                 sa6 = slap_listeners[i]->sl_sa.sa_in6_addr;
1639                                                 if ( sa6.sin6_family == AF_INET6 &&
1640                                                      !memcmp( &sa6.sin6_addr, &in6addr_any,
1641                                                                 sizeof(struct in6_addr) ) )
1642                                                 {
1643                                                         break;
1644                                                 }
1645                                         }
1646
1647                                         if ( i < l ) {
1648                                                 /* We are already listening to in6addr_any */
1649                                                 Debug( LDAP_DEBUG_CONNS,
1650                                                         "daemon: Attempt to listen to 0.0.0.0 failed, "
1651                                                         "already listening on ::, assuming IPv4 included\n",
1652                                                         0, 0, 0 );
1653                                                 slapd_close( slap_listeners[l]->sl_sd );
1654                                                 slap_listeners[l]->sl_sd = AC_SOCKET_INVALID;
1655                                                 continue;
1656                                         }
1657                                 }
1658                         }
1659 #endif
1660                         Debug( LDAP_DEBUG_ANY,
1661                                 "daemon: listen(%s, 5) failed errno=%d (%s)\n",
1662                                         slap_listeners[l]->sl_url.bv_val, err,
1663                                         sock_errstr(err) );
1664                         return (void*)-1;
1665                 }
1666
1667 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1668                 /* make the listening socket non-blocking */
1669                 if ( ber_pvt_socket_set_nonblock( slap_listeners[l]->sl_sd, 1 ) < 0 ) {
1670                         Debug( LDAP_DEBUG_ANY, "slapd_daemon_task: "
1671                                 "set nonblocking on a listening socket failed\n",
1672                                 0, 0, 0 );
1673                         slapd_shutdown = 2;
1674                         return (void*)-1;
1675                 }
1676 #endif
1677
1678                 slapd_add( slap_listeners[l]->sl_sd, 0, slap_listeners[l] );
1679         }
1680
1681 #ifdef HAVE_NT_SERVICE_MANAGER
1682         if ( started_event != NULL ) }
1683                 ldap_pvt_thread_cond_signal( &started_event );
1684         }
1685 #endif
1686
1687 #ifdef SLAP_SEM_LOAD_CONTROL
1688         /*
1689          * initialize count and lazyness of a semaphore
1690          */
1691         (void) ldap_lazy_sem_init(
1692                 SLAP_MAX_WORKER_THREADS + 4 /* max workers + margin */,
1693                 4 /* lazyness */ );
1694 #endif
1695
1696         /* initialization complete. Here comes the loop. */
1697
1698         while ( !slapd_shutdown ) {
1699                 ber_socket_t i;
1700                 int ns, nwriters;
1701                 int at;
1702                 ber_socket_t nfds;
1703 #if SLAP_EVENTS_ARE_INDEXED
1704                 ber_socket_t nrfds, nwfds;
1705 #endif
1706 #define SLAPD_EBADF_LIMIT 16
1707
1708                 time_t  now;
1709
1710                 SLAP_EVENT_DECL;
1711
1712                 struct timeval          tv;
1713                 struct timeval          *tvp;
1714
1715                 struct timeval          *cat;
1716                 time_t                          tdelta = 1;
1717                 struct re_s*            rtask;
1718                 now = slap_get_time();
1719
1720                 if( ( global_idletimeout > 0 ) &&
1721                         difftime( last_idle_check +
1722                         global_idletimeout/SLAPD_IDLE_CHECK_LIMIT, now ) < 0 ) {
1723                         connections_timeout_idle( now );
1724                         last_idle_check = now;
1725                 }
1726                 tv = idle;
1727
1728 #ifdef SIGHUP
1729                 if( slapd_gentle_shutdown ) {
1730                         ber_socket_t active;
1731
1732                         if( slapd_gentle_shutdown == 1 ) {
1733                                 Debug( LDAP_DEBUG_ANY, "slapd gentle shutdown\n", 0, 0, 0 );
1734                                 close_listeners( 1 );
1735                                 frontendDB->be_restrictops |= SLAP_RESTRICT_OP_WRITES;
1736                                 slapd_gentle_shutdown = 2;
1737                         }
1738
1739                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1740                         active = slap_daemon.sd_nactives;
1741                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1742                         if( active == 0 ) {
1743                                 slapd_shutdown = 2;
1744                                 break;
1745                         }
1746                 }
1747 #endif
1748                 at = 0;
1749
1750                 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1751
1752                 nwriters = slap_daemon.sd_nwriters;
1753
1754                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1755                         Listener *lr = slap_listeners[l];
1756
1757                         if ( lr->sl_sd == AC_SOCKET_INVALID ) continue;
1758
1759 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1760                         if ( lr->sl_mute || lr->sl_busy )
1761 #else
1762                         if ( lr->sl_mute )
1763 #endif
1764                         {
1765                             SLAP_SOCK_CLR_READ( lr->sl_sd );
1766                         } else {
1767                                 SLAP_SOCK_SET_READ( lr->sl_sd );
1768                         }
1769                 }
1770
1771                 SLAP_EVENT_INIT;
1772
1773                 nfds = SLAP_EVENT_MAX;
1774
1775                 if ( global_idletimeout && slap_daemon.sd_nactives ) at = 1;
1776
1777                 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1778
1779                 if ( at
1780 #if defined(HAVE_YIELDING_SELECT) || defined(NO_THREADS)
1781                         &&  ( tv.tv_sec || tv.tv_usec )
1782 #endif
1783                         )
1784                 {
1785                         tvp = &tv;
1786                 } else {
1787                         tvp = NULL;
1788                 }
1789
1790                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
1791                 rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
1792                 while ( cat && cat->tv_sec && cat->tv_sec <= now ) {
1793                         if ( ldap_pvt_runqueue_isrunning( &slapd_rq, rtask )) {
1794                                 ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
1795                         } else {
1796                                 ldap_pvt_runqueue_runtask( &slapd_rq, rtask );
1797                                 ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
1798                                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
1799                                 ldap_pvt_thread_pool_submit( &connection_pool,
1800                                                                                         rtask->routine, (void *) rtask );
1801                                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
1802                         }
1803                         rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
1804                 }
1805                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
1806
1807                 if ( cat && cat->tv_sec ) {
1808                         time_t diff = difftime( cat->tv_sec, now );
1809                         if ( diff == 0 ) diff = tdelta;
1810                         if ( tvp == NULL || diff < tv.tv_sec ) {
1811                                 tv.tv_sec = diff;
1812                                 tv.tv_usec = 0;
1813                                 tvp = &tv;
1814                         }
1815                 }
1816
1817                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1818                         Listener *lr = slap_listeners[l];
1819
1820                         if ( lr->sl_sd == AC_SOCKET_INVALID ) {
1821                                 continue;
1822                         }
1823
1824                         if ( lr->sl_mute ) {
1825                                 Debug( LDAP_DEBUG_CONNS,
1826                                         "daemon: select: listen=%d muted\n",
1827                                         lr->sl_sd, 0, 0 );
1828                                 continue;
1829                         }
1830
1831 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1832                         if ( lr->sl_busy ) {
1833                                 Debug( LDAP_DEBUG_CONNS,
1834                                         "daemon: select: listen=%d busy\n",
1835                                         lr->sl_sd, 0, 0 );
1836                                 continue;
1837                         }
1838 #endif
1839
1840                         Debug( LDAP_DEBUG_CONNS,
1841                                 "daemon: select: listen=%d active_threads=%d tvp=%s\n",
1842                                 lr->sl_sd, at, tvp == NULL ? "NULL" : "zero" );
1843                 }
1844
1845                 switch(ns = SLAP_EVENT_WAIT(tvp)) {
1846                 case -1: {      /* failure - try again */
1847                                 int err = sock_errno();
1848
1849                                 if( err == EBADF
1850 #ifdef WSAENOTSOCK
1851                                         /* you'd think this would be EBADF */
1852                                         || err == WSAENOTSOCK
1853 #endif
1854                                 ) {
1855                                         if (++ebadf < SLAPD_EBADF_LIMIT)
1856                                                 continue;
1857                                 }
1858
1859                                 if( err != EINTR ) {
1860                                         Debug( LDAP_DEBUG_CONNS,
1861                                                 "daemon: select failed (%d): %s\n",
1862                                                 err, sock_errstr(err), 0 );
1863                                         slapd_shutdown = 2;
1864                                 }
1865                         }
1866                         continue;
1867
1868                 case 0:         /* timeout - let threads run */
1869                         ebadf = 0;
1870 #ifndef HAVE_YIELDING_SELECT
1871                         Debug( LDAP_DEBUG_CONNS, "daemon: select timeout - yielding\n",
1872                             0, 0, 0 );
1873
1874                         ldap_pvt_thread_yield();
1875 #endif
1876                         continue;
1877
1878                 default:        /* something happened - deal with it */
1879                         if( slapd_shutdown ) continue;
1880
1881                         ebadf = 0;
1882                         Debug( LDAP_DEBUG_CONNS,
1883                                 "daemon: activity on %d descriptor%s\n",
1884                                 ns, ns != 1 ? "s" : "", 0 );
1885                         /* FALL THRU */
1886                 }
1887
1888 #if SLAP_EVENTS_ARE_INDEXED
1889                 if ( SLAP_EVENT_IS_READ( wake_sds[0] )) {
1890                         SLAP_EVENT_CLR_READ( wake_sds[0] );
1891                         ns--;
1892                         {
1893                                 char c[BUFSIZ];
1894                                 tcp_read( wake_sds[0], c, sizeof(c) );
1895                         }
1896                         Debug( LDAP_DEBUG_CONNS, "daemon: waked\n", 0, 0, 0 );
1897                         waking = 0;
1898                         continue;
1899                 }
1900
1901                 /* The event slot equals the descriptor number - this is
1902                  * true for Unix select and poll. We treat Windows select
1903                  * like this too, even though it's a kludge.
1904                  */
1905                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1906                         int rc;
1907
1908                         if ( ns <= 0 ) break;
1909                         if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) continue;
1910 #ifdef LDAP_CONNECTIONLESS
1911                         if ( slap_listeners[l]->sl_is_udp ) continue;
1912 #endif
1913                         if ( !SLAP_EVENT_IS_READ( slap_listeners[l]->sl_sd )) continue;
1914
1915                         /* clear events */
1916                         SLAP_EVENT_CLR_READ( slap_listeners[l]->sl_sd );
1917                         SLAP_EVENT_CLR_WRITE( slap_listeners[l]->sl_sd );
1918                         ns--;
1919
1920 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1921                         rc = slap_listener_activate(slap_listeners[l]);
1922 #else
1923                         rc = slap_listener(slap_listeners[l]);
1924 #endif
1925                 }
1926
1927                 /* bypass the following tests if no descriptors left */
1928                 if ( ns <= 0 ) {
1929 #ifndef HAVE_YIELDING_SELECT
1930                         ldap_pvt_thread_yield();
1931 #endif
1932                         continue;
1933                 }
1934
1935                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
1936 #ifdef HAVE_WINSOCK
1937                 nrfds = readfds.fd_count;
1938                 nwfds = writefds.fd_count;
1939                 for ( i = 0; i < readfds.fd_count; i++ ) {
1940                         Debug( LDAP_DEBUG_CONNS, " %d%s",
1941                                 readfds.fd_array[i], "r", 0 );
1942                 }
1943                 for ( i = 0; i < writefds.fd_count; i++ ) {
1944                         Debug( LDAP_DEBUG_CONNS, " %d%s",
1945                                 writefds.fd_array[i], "w", 0 );
1946                 }
1947
1948 #else
1949                 nrfds = 0;
1950                 nwfds = 0;
1951                 for ( i = 0; i < nfds; i++ ) {
1952                         int     r, w;
1953
1954                         r = SLAP_EVENT_IS_READ( i );
1955                         /* writefds was not initialized if nwriters was zero */
1956                         w = nwriters ? SLAP_EVENT_IS_WRITE( i ) : 0;
1957                         if ( r || w ) {
1958                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", i,
1959                                     r ? "r" : "", w ? "w" : "" );
1960                                 if ( r ) {
1961                                         nrfds++;
1962                                         ns--;
1963                                 }
1964                                 if ( w ) {
1965                                         nwfds++;
1966                                         ns--;
1967                                 }
1968                         }
1969                         if ( ns <= 0 ) break;
1970                 }
1971 #endif
1972                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
1973
1974
1975                 /* loop through the writers */
1976                 for ( i = 0; nwfds > 0; i++ ) {
1977                         ber_socket_t wd;
1978 #ifdef HAVE_WINSOCK
1979                         wd = writefds.fd_array[i];
1980 #else
1981                         if( ! SLAP_EVENT_IS_WRITE( i ) ) continue;
1982                         wd = i;
1983 #endif
1984
1985                         SLAP_EVENT_CLR_WRITE( wd );
1986                         nwfds--;
1987
1988                         Debug( LDAP_DEBUG_CONNS,
1989                                 "daemon: write active on %d\n",
1990                                 wd, 0, 0 );
1991
1992 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1993                         connection_write_activate( wd );
1994 #else
1995                         /*
1996                          * NOTE: it is possible that the connection was closed
1997                          * and that the stream is now inactive.
1998                          * connection_write() must validate the stream is still
1999                          * active.
2000                          */
2001                         if ( connection_write( wd ) < 0 ) {
2002                                 if ( SLAP_EVENT_IS_READ( wd )) {
2003                                         SLAP_EVENT_CLR_READ( (unsigned) wd );
2004                                         nrfds--;
2005                                 }
2006                                 slapd_close( wd );
2007                         }
2008 #endif
2009                 }
2010
2011                 for ( i = 0; nrfds > 0; i++ ) {
2012                         ber_socket_t rd;
2013 #ifdef HAVE_WINSOCK
2014                         rd = readfds.fd_array[i];
2015 #else
2016                         if( ! SLAP_EVENT_IS_READ( i ) ) continue;
2017                         rd = i;
2018 #endif
2019                         SLAP_EVENT_CLR_READ( rd );
2020                         nrfds--;
2021
2022                         Debug ( LDAP_DEBUG_CONNS,
2023                                 "daemon: read activity on %d\n", rd, 0, 0 );
2024                         /*
2025                          * NOTE: it is possible that the connection was closed
2026                          * and that the stream is now inactive.
2027                          * connection_read() must valid the stream is still
2028                          * active.
2029                          */
2030
2031 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2032                         connection_read_activate( rd );
2033 #else
2034                         if ( connection_read( rd ) < 0 ) {
2035                                 slapd_close( rd );
2036                         }
2037 #endif
2038                 }
2039 #else   /* !SLAP_EVENTS_ARE_INDEXED */
2040         /* FIXME */
2041         /* The events are returned in an arbitrary list. This is true
2042          * for /dev/poll, epoll and kqueue. In order to prioritize things
2043          * so that we can handle wake_sds first, listeners second, and then
2044          * all other connections last (as we do for select), we would need
2045          * to use multiple event handles and cascade them.
2046          *
2047          * That seems like a bit of hassle. So the wake_sds check has been
2048          * skipped. For epoll and kqueue we can associate arbitrary data with
2049          * an event, so we could use pointers to the listener structure
2050          * instead of just the file descriptor. For /dev/poll we have to
2051          * search the listeners array for a matching descriptor.
2052          *
2053          * We now handle wake events when we see them; they are not given
2054          * higher priority.
2055          */
2056 #ifdef LDAP_DEBUG
2057                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
2058
2059                 for (i=0; i<ns; i++) {
2060                         int     r, w;
2061
2062                         /* Don't log listener events */
2063                         if ( SLAP_EVENT_IS_LISTENER(i)
2064 #ifdef LDAP_CONNECTIONLESS
2065                                 && !((SLAP_EVENT_LISTENER(i))->sl_is_udp)
2066 #endif
2067                                 )
2068                         {
2069                                 continue;
2070                         }
2071
2072                         /* Don't log internal wake events */
2073                         if ( SLAP_EVENT_FD( i ) == wake_sds[0] ) continue;
2074
2075                         r = SLAP_EVENT_IS_READ( i );
2076                         w = SLAP_EVENT_IS_WRITE( i );
2077                         if ( r || w ) {
2078                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", SLAP_EVENT_FD(i),
2079                                     r ? "r" : "", w ? "w" : "" );
2080                         }
2081                 }
2082                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
2083 #endif
2084
2085                 for (i=0; i<ns; i++) {
2086                         int rc = 1, fd;
2087
2088                         if ( SLAP_EVENT_IS_LISTENER(i) ) {
2089 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2090                                 rc = slap_listener_activate( SLAP_EVENT_LISTENER( i ));
2091 #else
2092                                 rc = slap_listener( SLAP_EVENT_LISTENER( i ));
2093 #endif
2094                         }
2095
2096                         /* If we found a regular listener, rc is now zero, and we
2097                          * can skip the data portion. But if it was a UDP listener
2098                          * then rc is still 1, and we want to handle the data.
2099                          */
2100                         if ( rc ) {
2101                                 fd = SLAP_EVENT_FD( i );
2102
2103                                 /* Handle wake events */
2104                                 if ( fd == wake_sds[0] ) {
2105                                         char c[BUFSIZ];
2106                                         tcp_read( wake_sds[0], c, sizeof(c) );
2107                                         waking = 0;
2108                                         break;
2109                                 }
2110
2111                                 if( SLAP_EVENT_IS_WRITE( i ) ) {
2112                                         Debug( LDAP_DEBUG_CONNS,
2113                                                 "daemon: write active on %d\n",
2114                                                 fd, 0, 0 );
2115
2116 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2117                                         connection_write_activate( fd );
2118 #else
2119                                         /*
2120                                          * NOTE: it is possible that the connection was closed
2121                                          * and that the stream is now inactive.
2122                                          * connection_write() must valid the stream is still
2123                                          * active.
2124                                          */
2125                                         if ( connection_write( fd ) < 0 ) {
2126                                                 slapd_close( fd );
2127                                                 continue;
2128                                         }
2129 #endif
2130                                 }
2131                                 if( SLAP_EVENT_IS_READ( i ) ) {
2132                                         Debug( LDAP_DEBUG_CONNS,
2133                                                 "daemon: read active on %d\n",
2134                                                 fd, 0, 0 );
2135
2136 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2137                                         connection_read_activate( fd );
2138 #else
2139                                         /*
2140                                          * NOTE: it is possible that the connection was closed
2141                                          * and that the stream is now inactive.
2142                                          * connection_read() must valid the stream is still
2143                                          * active.
2144                                          */
2145                                         if ( connection_read( fd ) < 0 ) slapd_close( fd );
2146 #endif
2147                                 }
2148                         }
2149                 }
2150 #endif  /* SLAP_EVENTS_ARE_INDEXED */
2151
2152 #ifndef HAVE_YIELDING_SELECT
2153                 ldap_pvt_thread_yield();
2154 #endif
2155         }
2156
2157         if( slapd_shutdown == 1 ) {
2158                 Debug( LDAP_DEBUG_ANY,
2159                         "daemon: shutdown requested and initiated.\n",
2160                         0, 0, 0 );
2161
2162         } else if ( slapd_shutdown == 2 ) {
2163 #ifdef HAVE_NT_SERVICE_MANAGER
2164                         Debug( LDAP_DEBUG_ANY,
2165                                "daemon: shutdown initiated by Service Manager.\n",
2166                                0, 0, 0);
2167 #else /* !HAVE_NT_SERVICE_MANAGER */
2168                         Debug( LDAP_DEBUG_ANY,
2169                                "daemon: abnormal condition, shutdown initiated.\n",
2170                                0, 0, 0 );
2171 #endif /* !HAVE_NT_SERVICE_MANAGER */
2172         } else {
2173                 Debug( LDAP_DEBUG_ANY,
2174                        "daemon: no active streams, shutdown initiated.\n",
2175                        0, 0, 0 );
2176         }
2177
2178         if( slapd_gentle_shutdown != 2 ) close_listeners ( 0 );
2179
2180         if( !slapd_gentle_shutdown ) {
2181                 slapd_abrupt_shutdown = 1;
2182                 connections_shutdown();
2183         }
2184
2185         Debug( LDAP_DEBUG_ANY,
2186             "slapd shutdown: waiting for %d threads to terminate\n",
2187             ldap_pvt_thread_pool_backload(&connection_pool), 0, 0 );
2188         ldap_pvt_thread_pool_destroy(&connection_pool, 1);
2189
2190         free ( slap_listeners );
2191         slap_listeners = NULL;
2192
2193         return NULL;
2194 }
2195
2196
2197 int slapd_daemon( void )
2198 {
2199         int rc;
2200
2201         connections_init();
2202
2203 #define SLAPD_LISTENER_THREAD 1
2204 #if defined( SLAPD_LISTENER_THREAD )
2205         {
2206                 ldap_pvt_thread_t       listener_tid;
2207
2208                 /* listener as a separate THREAD */
2209                 rc = ldap_pvt_thread_create( &listener_tid,
2210                         0, slapd_daemon_task, NULL );
2211
2212                 if ( rc != 0 ) {
2213                         Debug( LDAP_DEBUG_ANY,
2214                         "listener ldap_pvt_thread_create failed (%d)\n", rc, 0, 0 );
2215                         return rc;
2216                 }
2217
2218                 /* wait for the listener thread to complete */
2219                 ldap_pvt_thread_join( listener_tid, (void *) NULL );
2220         }
2221 #else
2222         /* experimental code */
2223         slapd_daemon_task( NULL );
2224 #endif
2225
2226         return 0;
2227
2228 }
2229
2230 static int sockinit(void)
2231 {
2232 #if defined( HAVE_WINSOCK2 )
2233     WORD wVersionRequested;
2234         WSADATA wsaData;
2235         int err;
2236
2237         wVersionRequested = MAKEWORD( 2, 0 );
2238
2239         err = WSAStartup( wVersionRequested, &wsaData );
2240         if ( err != 0 ) {
2241                 /* Tell the user that we couldn't find a usable */
2242                 /* WinSock DLL.                                  */
2243                 return -1;
2244         }
2245
2246         /* Confirm that the WinSock DLL supports 2.0.*/
2247         /* Note that if the DLL supports versions greater    */
2248         /* than 2.0 in addition to 2.0, it will still return */
2249         /* 2.0 in wVersion since that is the version we      */
2250         /* requested.                                        */
2251
2252         if ( LOBYTE( wsaData.wVersion ) != 2 ||
2253                 HIBYTE( wsaData.wVersion ) != 0 )
2254         {
2255             /* Tell the user that we couldn't find a usable */
2256             /* WinSock DLL.                                  */
2257             WSACleanup();
2258             return -1;
2259         }
2260
2261         /* The WinSock DLL is acceptable. Proceed. */
2262 #elif defined( HAVE_WINSOCK )
2263         WSADATA wsaData;
2264         if ( WSAStartup( 0x0101, &wsaData ) != 0 ) return -1;
2265 #endif
2266
2267         return 0;
2268 }
2269
2270 static int sockdestroy(void)
2271 {
2272 #if defined( HAVE_WINSOCK2 ) || defined( HAVE_WINSOCK )
2273         WSACleanup();
2274 #endif
2275         return 0;
2276 }
2277
2278 RETSIGTYPE
2279 slap_sig_shutdown( int sig )
2280 {
2281 #if 0
2282         Debug(LDAP_DEBUG_TRACE, "slap_sig_shutdown: signal %d\n", sig, 0, 0);
2283 #endif
2284
2285         /*
2286          * If the NT Service Manager is controlling the server, we don't
2287          * want SIGBREAK to kill the server. For some strange reason,
2288          * SIGBREAK is generated when a user logs out.
2289          */
2290
2291 #if HAVE_NT_SERVICE_MANAGER && SIGBREAK
2292         if (is_NT_Service && sig == SIGBREAK) {
2293                 /* empty */;
2294         } else
2295 #endif
2296 #ifdef SIGHUP
2297         if (sig == SIGHUP && global_gentlehup && slapd_gentle_shutdown == 0) {
2298                 slapd_gentle_shutdown = 1;
2299         } else
2300 #endif
2301         {
2302                 slapd_shutdown = 1;
2303         }
2304
2305         WAKE_LISTENER(1);
2306
2307         /* reinstall self */
2308         (void) SIGNAL_REINSTALL( sig, slap_sig_shutdown );
2309 }
2310
2311 RETSIGTYPE
2312 slap_sig_wake( int sig )
2313 {
2314         WAKE_LISTENER(1);
2315
2316         /* reinstall self */
2317         (void) SIGNAL_REINSTALL( sig, slap_sig_wake );
2318 }
2319
2320
2321 void slapd_add_internal(ber_socket_t s, int isactive) {
2322         slapd_add(s, isactive, NULL);
2323 }
2324
2325 Listener ** slapd_get_listeners(void) {
2326         return slap_listeners;
2327 }
2328
2329 void slap_wake_listener() {
2330         WAKE_LISTENER(1);
2331 }