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 volatile int waking;
  85 #define WAKE_LISTENER(w)        do { \
  86         if ((w) && ++waking < 5) { \
  87                 tcp_write( wake_sds[1], "0", 1 ); \
  88         } \
  89 } while(0)
  90
  91 volatile sig_atomic_t slapd_shutdown = 0;
  92 volatile sig_atomic_t slapd_gentle_shutdown = 0;
  93 volatile sig_atomic_t slapd_abrupt_shutdown = 0;
  94
  95 static struct slap_daemon {
  96         ldap_pvt_thread_mutex_t sd_mutex;
  97 #ifdef HAVE_TCPD
  98         ldap_pvt_thread_mutex_t tcpd_mutex;
  99 #endif
 100
 101         ber_socket_t sd_nactives;
 102         int sd_nwriters;
 103
 104 #ifdef HAVE_EPOLL
 105         struct epoll_event *sd_epolls;
 106         int     sd_nepolls;
 107         int     *sd_index;
 108         int     sd_epfd;
 109         int     sd_nfds;
 110 #else
 111 #ifndef HAVE_WINSOCK
 112         /* In winsock, accept() returns values higher than dtblsize
 113                 so don't bother with this optimization */
 114         int sd_nfds;
 115 #endif
 116         fd_set sd_actives;
 117         fd_set sd_readers;
 118         fd_set sd_writers;
 119 #endif
 120 } slap_daemon;
 121
 122 #ifdef HAVE_EPOLL
 123 # define SLAP_EVENTS_ARE_INDEXED        0
 124 # define SLAP_SOCK_IX(s)        (slap_daemon.sd_index[(s)])
 125 # define SLAP_SOCK_EP(s)        (slap_daemon.sd_epolls[SLAP_SOCK_IX(s)])
 126 # define SLAP_SOCK_EV(s)        (SLAP_SOCK_EP(s).events)
 127 # define SLAP_SOCK_IS_ACTIVE(s) (SLAP_SOCK_IX(s) != -1)
 128 # define SLAP_SOCK_NOT_ACTIVE(s)        (SLAP_SOCK_IX(s) == -1)
 129 # define SLAP_SOCK_IS_SET(s, mode)      (SLAP_SOCK_EV(s) & (mode))
 130
 131 # define SLAP_SOCK_IS_READ(s)   SLAP_SOCK_IS_SET((s), EPOLLIN)
 132 # define SLAP_SOCK_IS_WRITE(s)  SLAP_SOCK_IS_SET((s), EPOLLOUT)
 133
 134 # define SLAP_SET_SOCK(s, mode) do { \
 135         if ((SLAP_SOCK_EV(s) & (mode)) != (mode)) {     \
 136                 SLAP_SOCK_EV(s) |= (mode); \
 137                 epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_MOD, (s), \
 138                         &SLAP_SOCK_EP(s)); \
 139         } \
 140 } while(0)
 141
 142 # define SLAP_CLR_SOCK(s, mode) do { \
 143         if ((SLAP_SOCK_EV(s) & (mode))) { \
 144                 SLAP_SOCK_EV(s) &= ~(mode);     \
 145                 epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_MOD, s, \
 146                         &SLAP_SOCK_EP(s)); \
 147         } \
 148 } while(0)
 149
 150 # define SLAP_SOCK_SET_READ(s)  SLAP_SET_SOCK(s, EPOLLIN)
 151 # define SLAP_SOCK_SET_WRITE(s) SLAP_SET_SOCK(s, EPOLLOUT)
 152
 153 # ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 154 #  define SLAP_SOCK_SET_SUSPEND(s) \
 155         ( slap_daemon.sd_suspend[SLAP_SOCK_IX(s)] = 1 )
 156 #  define SLAP_SOCK_CLR_SUSPEND(s) \
 157         ( slap_daemon.sd_suspend[SLAP_SOCK_IX(s)] = 0 )
 158 #  define SLAP_SOCK_IS_SUSPEND(s) \
 159         ( slap_daemon.sd_suspend[SLAP_SOCK_IX(s)] == 1 )
 160 # endif
 161
 162 # define SLAP_SOCK_CLR_READ(s)  SLAP_CLR_SOCK((s), EPOLLIN)
 163 # define SLAP_SOCK_CLR_WRITE(s) SLAP_CLR_SOCK((s), EPOLLOUT)
 164
 165 # define SLAP_CLR_EVENT(i, mode)        (revents[(i)].events &= ~(mode))
 166
 167 # define SLAP_EVENT_MAX slap_daemon.sd_nfds
 168
 169 /* If a Listener address is provided, store that as the epoll data.
 170  * Otherwise, store the address of this socket's slot in the
 171  * index array. If we can't do this add, the system is out of
 172  * resources and we need to shutdown.
 173  */
 174 # define SLAP_ADD_SOCK(s, l) do { \
 175         int rc; \
 176         SLAP_SOCK_IX((s)) = slap_daemon.sd_nfds; \
 177         SLAP_SOCK_EP((s)).data.ptr = (l) ? (l) : (void *)(&SLAP_SOCK_IX(s)); \
 178         SLAP_SOCK_EV((s)) = EPOLLIN; \
 179         rc = epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_ADD, \
 180                 (s), &SLAP_SOCK_EP((s))); \
 181         if ( rc == 0 ) { \
 182                 slap_daemon.sd_nfds++; \
 183         } else { \
 184                 Debug( LDAP_DEBUG_ANY, \
 185                         "daemon: epoll_ctl(ADD,fd=%d) failed, errno=%d, shutting down\n", \
 186                         s, errno, 0 ); \
 187                 slapd_shutdown = 2; \
 188         } \
 189 } while (0)
 190
 191 # define SLAP_EV_LISTENER(ptr) (((int *)(ptr) >= slap_daemon.sd_index && \
 192         (int *)(ptr) <= (slap_daemon.sd_index+dtblsize)) ? 0 : 1 )
 193
 194 # define SLAP_EV_PTRFD(ptr) (SLAP_EV_LISTENER(ptr) ? \
 195         ((Listener *)ptr)->sl_sd : (int *)(ptr) - slap_daemon.sd_index)
 196
 197 # define SLAP_DEL_SOCK(s) do { \
 198         int fd, rc, index = SLAP_SOCK_IX((s)); \
 199         if ( index < 0 ) break; \
 200         rc = epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_DEL, \
 201                 (s), &SLAP_SOCK_EP((s))); \
 202         slap_daemon.sd_epolls[index] = \
 203                 slap_daemon.sd_epolls[slap_daemon.sd_nfds-1]; \
 204         fd = SLAP_EV_PTRFD(slap_daemon.sd_epolls[index].data.ptr); \
 205         slap_daemon.sd_index[fd] = index; \
 206         slap_daemon.sd_index[(s)] = -1; \
 207         slap_daemon.sd_nfds--; \
 208 } while (0)
 209
 210 # define SLAP_EVENT_CLR_READ(i) SLAP_CLR_EVENT((i), EPOLLIN)
 211 # define SLAP_EVENT_CLR_WRITE(i)        SLAP_CLR_EVENT((i), EPOLLOUT)
 212
 213 # define SLAP_CHK_EVENT(i, mode)        (revents[(i)].events & mode)
 214
 215 # define SLAP_EVENT_IS_READ(i)  SLAP_CHK_EVENT((i), EPOLLIN)
 216 # define SLAP_EVENT_IS_WRITE(i) SLAP_CHK_EVENT((i), EPOLLOUT)
 217 # define SLAP_EVENT_IS_LISTENER(i)      SLAP_EV_LISTENER(revents[(i)].data.ptr)
 218 # define SLAP_EVENT_LISTENER(i) (revents[(i)].data.ptr)
 219
 220 # define SLAP_EVENT_FD(i)       SLAP_EV_PTRFD(revents[(i)].data.ptr)
 221
 222 # define SLAP_SOCK_SET_INIT do { \
 223         slap_daemon.sd_epolls = ch_calloc(1, \
 224                 sizeof(struct epoll_event) * dtblsize * 2); \
 225         slap_daemon.sd_index = ch_malloc(sizeof(int) * dtblsize); \
 226         slap_daemon.sd_epfd = epoll_create( dtblsize ); \
 227         for (i=0; i<dtblsize; i++) slap_daemon.sd_index[i] = -1; \
 228 } while (0)
 229
 230 # define SLAP_EVENT_DECL struct epoll_event *revents
 231
 232 # define SLAP_EVENT_INIT do { \
 233         revents = slap_daemon.sd_epolls + dtblsize; \
 234 } while (0)
 235
 236 # define SLAP_EVENT_WAIT(tvp) \
 237         epoll_wait( slap_daemon.sd_epfd, revents, \
 238                 dtblsize, (tvp) ? (tvp)->tv_sec * 1000 : -1 )
 239
 240 #else
 241 /* select */
 242
 243 # define SLAP_EVENTS_ARE_INDEXED 1
 244 # define SLAP_EVENT_DECL        \
 245         fd_set readfds, writefds
 246
 247 # define SLAP_EVENT_INIT do { \
 248         AC_MEMCPY( &readfds, &slap_daemon.sd_readers, sizeof(fd_set) ); \
 249         if ( nwriters ) { \
 250                 AC_MEMCPY( &writefds, &slap_daemon.sd_writers, sizeof(fd_set) ); \
 251         } else { \
 252                 FD_ZERO( &writefds ); \
 253         } \
 254 } while (0)
 255
 256 # ifdef FD_SETSIZE
 257 #  define       CHK_SETSIZE do { \
 258         if (dtblsize > FD_SETSIZE) dtblsize = FD_SETSIZE; \
 259 } while (0)
 260 # else
 261 #  define        CHK_SETSIZE do { ; } while (0)
 262 # endif
 263
 264 # define        SLAP_SOCK_SET_INIT do { \
 265         CHK_SETSIZE; \
 266         FD_ZERO(&slap_daemon.sd_readers); \
 267         FD_ZERO(&slap_daemon.sd_writers); \
 268 } while (0)
 269
 270 # define SLAP_SOCK_IS_ACTIVE(fd)        FD_ISSET((fd), &slap_daemon.sd_actives)
 271 # define SLAP_SOCK_IS_READ(fd)          FD_ISSET((fd), &slap_daemon.sd_readers)
 272 # define SLAP_SOCK_IS_WRITE(fd)         FD_ISSET((fd), &slap_daemon.sd_writers)
 273
 274 # define SLAP_SOCK_NOT_ACTIVE(fd)       (!SLAP_SOCK_IS_ACTIVE(fd) && \
 275          !SLAP_SOCK_IS_READ(fd) && !SLAP_SOCK_IS_WRITE(fd))
 276
 277 # ifdef HAVE_WINSOCK
 278 #  define SLAP_SOCK_SET_READ(fd)        do { \
 279         if (!SLAP_SOCK_IS_READ(fd)) { FD_SET((fd), &slap_daemon.sd_readers); } \
 280 } while(0)
 281 #  define SLAP_SOCK_SET_WRITE(fd)       do { \
 282         if (!SLAP_SOCK_IS_WRITE(fd)) { FD_SET((fd), &slap_daemon.sd_writers); } \
 283 } while(0)
 284
 285 #  define SLAP_ADDTEST(s)
 286 #  define SLAP_EVENT_MAX        dtblsize
 287 # else
 288 #  define SLAP_SOCK_SET_READ(fd)        FD_SET((fd), &slap_daemon.sd_readers)
 289 #  define SLAP_SOCK_SET_WRITE(fd)       FD_SET((fd), &slap_daemon.sd_writers)
 290
 291 #  define SLAP_EVENT_MAX        slap_daemon.sd_nfds
 292 #  define SLAP_ADDTEST(s)       do { \
 293         if ((s) >= slap_daemon.sd_nfds) slap_daemon.sd_nfds = (s)+1; \
 294 } while (0)
 295 # endif
 296
 297 # define SLAP_SOCK_CLR_READ(fd)         FD_CLR((fd), &slap_daemon.sd_readers)
 298 # define SLAP_SOCK_CLR_WRITE(fd)        FD_CLR((fd), &slap_daemon.sd_writers)
 299
 300 # define SLAP_ADD_SOCK(s, l) do { \
 301         SLAP_ADDTEST((s)); \
 302         FD_SET((s), &slap_daemon.sd_actives); \
 303         FD_SET((s), &slap_daemon.sd_readers); \
 304 } while(0)
 305
 306 # define SLAP_DEL_SOCK(s) do { \
 307         FD_CLR((s), &slap_daemon.sd_actives); \
 308         FD_CLR((s), &slap_daemon.sd_readers); \
 309         FD_CLR((s), &slap_daemon.sd_writers); \
 310 } while(0)
 311
 312 # define SLAP_EVENT_IS_READ(fd)         FD_ISSET((fd), &readfds)
 313 # define SLAP_EVENT_IS_WRITE(fd)        FD_ISSET((fd), &writefds)
 314
 315 # define SLAP_EVENT_CLR_READ(fd)        FD_CLR((fd), &readfds)
 316 # define SLAP_EVENT_CLR_WRITE(fd)       FD_CLR((fd), &writefds)
 317
 318 # define SLAP_EVENT_WAIT(tvp) \
 319         select( SLAP_EVENT_MAX, &readfds, \
 320                 nwriters > 0 ? &writefds : NULL, NULL, (tvp) )
 321 #endif
 322
 323 #ifdef HAVE_SLP
 324 /*
 325  * SLP related functions
 326  */
 327 #include <slp.h>
 328
 329 #define LDAP_SRVTYPE_PREFIX "service:ldap://"
 330 #define LDAPS_SRVTYPE_PREFIX "service:ldaps://"
 331 static char** slapd_srvurls = NULL;
 332 static SLPHandle slapd_hslp = 0;
 333 int slapd_register_slp = 0;
 334
 335 void slapd_slp_init( const char* urls ) {
 336         int i;
 337
 338         slapd_srvurls = ldap_str2charray( urls, " " );
 339
 340         if( slapd_srvurls == NULL ) return;
 341
 342         /* find and expand INADDR_ANY URLs */
 343         for( i=0; slapd_srvurls[i] != NULL; i++ ) {
 344                 if( strcmp( slapd_srvurls[i], "ldap:///" ) == 0) {
 345                         char *host = ldap_pvt_get_fqdn( NULL );
 346                         if ( host != NULL ) {
 347                                 slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i],
 348                                         strlen( host ) +
 349                                         sizeof( LDAP_SRVTYPE_PREFIX ) );
 350                                 strcpy( lutil_strcopy(slapd_srvurls[i],
 351                                         LDAP_SRVTYPE_PREFIX ), host );
 352
 353                                 ch_free( host );
 354                         }
 355
 356                 } else if ( strcmp( slapd_srvurls[i], "ldaps:///" ) == 0) {
 357                         char *host = ldap_pvt_get_fqdn( NULL );
 358                         if ( host != NULL ) {
 359                                 slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i],
 360                                         strlen( host ) +
 361                                         sizeof( LDAPS_SRVTYPE_PREFIX ) );
 362                                 strcpy( lutil_strcopy(slapd_srvurls[i],
 363                                         LDAPS_SRVTYPE_PREFIX ), host );
 364
 365                                 ch_free( host );
 366                         }
 367                 }
 368         }
 369
 370         /* open the SLP handle */
 371         SLPOpen( "en", 0, &slapd_hslp );
 372 }
 373
 374 void slapd_slp_deinit() {
 375         if( slapd_srvurls == NULL ) return;
 376
 377         ldap_charray_free( slapd_srvurls );
 378         slapd_srvurls = NULL;
 379
 380         /* close the SLP handle */
 381         SLPClose( slapd_hslp );
 382 }
 383
 384 void slapd_slp_regreport(
 385         SLPHandle hslp,
 386         SLPError errcode,
 387         void* cookie )
 388 {
 389         /* empty report */
 390 }
 391
 392 void slapd_slp_reg() {
 393         int i;
 394
 395         if( slapd_srvurls == NULL ) return;
 396
 397         for( i=0; slapd_srvurls[i] != NULL; i++ ) {
 398                 if( strncmp( slapd_srvurls[i], LDAP_SRVTYPE_PREFIX,
 399                                 sizeof( LDAP_SRVTYPE_PREFIX ) - 1 ) == 0 ||
 400                     strncmp( slapd_srvurls[i], LDAPS_SRVTYPE_PREFIX,
 401                                 sizeof( LDAPS_SRVTYPE_PREFIX ) - 1 ) == 0 )
 402                 {
 403                         SLPReg( slapd_hslp,
 404                                 slapd_srvurls[i],
 405                                 SLP_LIFETIME_MAXIMUM,
 406                                 "ldap",
 407                                 "",
 408                                 1,
 409                                 slapd_slp_regreport,
 410                                 NULL );
 411                 }
 412         }
 413 }
 414
 415 void slapd_slp_dereg() {
 416         int i;
 417
 418         if( slapd_srvurls == NULL ) return;
 419
 420         for( i=0; slapd_srvurls[i] != NULL; i++ ) {
 421                 SLPDereg( slapd_hslp,
 422                         slapd_srvurls[i],
 423                         slapd_slp_regreport,
 424                         NULL );
 425         }
 426 }
 427 #endif /* HAVE_SLP */
 428
 429 /*
 430  * Add a descriptor to daemon control
 431  *
 432  * If isactive, the descriptor is a live server session and is subject
 433  * to idletimeout control. Otherwise, the descriptor is a passive
 434  * listener or an outbound client session, and not subject to
 435  * idletimeout. The underlying event handler may record the Listener
 436  * argument to differentiate Listener's from real sessions.
 437  */
 438 static void slapd_add(ber_socket_t s, int isactive, Listener *sl) {
 439         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 440
 441         assert( SLAP_SOCK_NOT_ACTIVE(s) );
 442
 443         if ( isactive ) slap_daemon.sd_nactives++;
 444
 445         SLAP_ADD_SOCK(s, sl);
 446
 447         Debug( LDAP_DEBUG_CONNS, "daemon: added %ldr\n",
 448                 (long) s, 0, 0 );
 449
 450         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 451
 452 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 453         WAKE_LISTENER(1);
 454 #endif
 455 }
 456
 457 void slapd_sd_lock()
 458 {
 459         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 460 }
 461
 462 void slapd_sd_unlock()
 463 {
 464         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 465 }
 466
 467 /*
 468  * Remove the descriptor from daemon control
 469  */
 470 void slapd_remove(
 471         ber_socket_t s,
 472         int wasactive,
 473         int wake,
 474         int locked )
 475 {
 476         int waswriter;
 477         int wasreader;
 478
 479         if ( !locked )
 480                 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 481
 482         assert( SLAP_SOCK_IS_ACTIVE( s ));
 483
 484         if ( wasactive ) slap_daemon.sd_nactives--;
 485
 486         waswriter = SLAP_SOCK_IS_WRITE(s);
 487         wasreader = SLAP_SOCK_IS_READ(s);
 488
 489         Debug( LDAP_DEBUG_CONNS, "daemon: removing %ld%s%s\n",
 490                 (long) s,
 491                 wasreader ? "r" : "",
 492                 waswriter ? "w" : "" );
 493
 494         if ( waswriter ) slap_daemon.sd_nwriters--;
 495
 496         SLAP_DEL_SOCK(s);
 497
 498         /* If we ran out of file descriptors, we dropped a listener from
 499          * the select() loop. Now that we're removing a session from our
 500          * control, we can try to resume a dropped listener to use.
 501          */
 502         if ( emfile ) {
 503                 int i;
 504                 for ( i = 0; slap_listeners[i] != NULL; i++ ) {
 505                         Listener *lr = slap_listeners[i];
 506
 507                         if ( lr->sl_sd == AC_SOCKET_INVALID ) continue;
 508                         if ( lr->sl_sd == s ) continue;
 509                         if ( lr->sl_mute ) {
 510                                 lr->sl_mute = 0;
 511                                 emfile--;
 512                                 break;
 513                         }
 514                 }
 515                 /* Walked the entire list without enabling anything; emfile
 516                  * counter is stale. Reset it.
 517                  */
 518                 if ( slap_listeners[i] == NULL ) emfile = 0;
 519         }
 520         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 521         WAKE_LISTENER(wake || slapd_gentle_shutdown == 2);
 522 }
 523
 524 void slapd_clr_write(ber_socket_t s, int wake) {
 525         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 526
 527         assert( SLAP_SOCK_IS_ACTIVE( s ));
 528
 529         if ( SLAP_SOCK_IS_WRITE( s )) {
 530                 SLAP_SOCK_CLR_WRITE( s );
 531                 slap_daemon.sd_nwriters--;
 532         }
 533
 534         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 535         WAKE_LISTENER(wake);
 536 }
 537
 538 void slapd_set_write(ber_socket_t s, int wake) {
 539         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 540
 541         assert( SLAP_SOCK_IS_ACTIVE( s ));
 542
 543         if ( !SLAP_SOCK_IS_WRITE( s )) {
 544                 SLAP_SOCK_SET_WRITE( s );
 545                 slap_daemon.sd_nwriters++;
 546         }
 547
 548         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 549         WAKE_LISTENER(wake);
 550 }
 551
 552 int slapd_clr_read(ber_socket_t s, int wake) {
 553         int rc = 1;
 554         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 555
 556         if ( SLAP_SOCK_IS_ACTIVE( s )) {
 557                 SLAP_SOCK_CLR_READ( s );
 558                 rc = 0;
 559         }
 560         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 561         if ( !rc )
 562                 WAKE_LISTENER(wake);
 563         return rc;
 564 }
 565
 566 void slapd_set_read(ber_socket_t s, int wake) {
 567         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 568
 569         assert( SLAP_SOCK_IS_ACTIVE( s ));
 570         if (!SLAP_SOCK_IS_READ( s )) SLAP_SOCK_SET_READ( s );
 571
 572         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 573         WAKE_LISTENER(wake);
 574 }
 575
 576 static void slapd_close(ber_socket_t s) {
 577         Debug( LDAP_DEBUG_CONNS, "daemon: closing %ld\n",
 578                 (long) s, 0, 0 );
 579         tcp_close(s);
 580 }
 581
 582 static void slap_free_listener_addresses(struct sockaddr **sal) {
 583         struct sockaddr **sap;
 584         if (sal == NULL) return;
 585         for (sap = sal; *sap != NULL; sap++) ch_free(*sap);
 586         ch_free(sal);
 587 }
 588
 589 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
 590 static int get_url_perms(
 591         char    **exts,
 592         mode_t  *perms,
 593         int     *crit )
 594 {
 595         int     i;
 596
 597         assert( exts != NULL );
 598         assert( perms != NULL );
 599         assert( crit != NULL );
 600
 601         *crit = 0;
 602         for ( i = 0; exts[ i ]; i++ ) {
 603                 char    *type = exts[ i ];
 604                 int     c = 0;
 605
 606                 if ( type[ 0 ] == '!' ) {
 607                         c = 1;
 608                         type++;
 609                 }
 610
 611                 if ( strncasecmp( type, LDAPI_MOD_URLEXT "=",
 612                         sizeof(LDAPI_MOD_URLEXT "=") - 1 ) == 0 )
 613                 {
 614                         char *value = type + ( sizeof(LDAPI_MOD_URLEXT "=") - 1 );
 615                         mode_t p = 0;
 616                         int j;
 617
 618                         switch (strlen(value)) {
 619                         case 4:
 620                                 /* skip leading '0' */
 621                                 if ( value[ 0 ] != '0' ) return LDAP_OTHER;
 622                                 value++;
 623
 624                         case 3:
 625                                 for ( j = 0; j < 3; j++) {
 626                                         int     v;
 627
 628                                         v = value[ j ] - '0';
 629
 630                                         if ( v < 0 || v > 7 ) return LDAP_OTHER;
 631
 632                                         p |= v << 3*(2-j);
 633                                 }
 634                                 break;
 635
 636                         case 10:
 637                                 for ( j = 1; j < 10; j++ ) {
 638                                         static mode_t   m[] = { 0,
 639                                                 S_IRUSR, S_IWUSR, S_IXUSR,
 640                                                 S_IRGRP, S_IWGRP, S_IXGRP,
 641                                                 S_IROTH, S_IWOTH, S_IXOTH
 642                                         };
 643                                         static char     c[] = "-rwxrwxrwx";
 644
 645                                         if ( value[ j ] == c[ j ] ) {
 646                                                 p |= m[ j ];
 647
 648                                         } else if ( value[ j ] != '-' ) {
 649                                                 return LDAP_OTHER;
 650                                         }
 651                                 }
 652                                 break;
 653
 654                         default:
 655                                 return LDAP_OTHER;
 656                         }
 657
 658                         *crit = c;
 659                         *perms = p;
 660
 661                         return LDAP_SUCCESS;
 662                 }
 663         }
 664
 665         return LDAP_OTHER;
 666 }
 667 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
 668
 669 /* port = 0 indicates AF_LOCAL */
 670 static int slap_get_listener_addresses(
 671         const char *host,
 672         unsigned short port,
 673         struct sockaddr ***sal)
 674 {
 675         struct sockaddr **sap;
 676
 677 #ifdef LDAP_PF_LOCAL
 678         if ( port == 0 ) {
 679                 *sal = ch_malloc(2 * sizeof(void *));
 680                 if (*sal == NULL) return -1;
 681
 682                 sap = *sal;
 683                 *sap = ch_malloc(sizeof(struct sockaddr_un));
 684                 if (*sap == NULL) goto errexit;
 685                 sap[1] = NULL;
 686
 687                 if ( strlen(host) >
 688                         (sizeof(((struct sockaddr_un *)*sap)->sun_path) - 1) )
 689                 {
 690                         Debug( LDAP_DEBUG_ANY,
 691                                 "daemon: domain socket path (%s) too long in URL",
 692                                 host, 0, 0);
 693                         goto errexit;
 694                 }
 695
 696                 (void)memset( (void *)*sap, '\0', sizeof(struct sockaddr_un) );
 697                 (*sap)->sa_family = AF_LOCAL;
 698                 strcpy( ((struct sockaddr_un *)*sap)->sun_path, host );
 699         } else
 700 #endif
 701         {
 702 #ifdef HAVE_GETADDRINFO
 703                 struct addrinfo hints, *res, *sai;
 704                 int n, err;
 705                 char serv[7];
 706
 707                 memset( &hints, '\0', sizeof(hints) );
 708                 hints.ai_flags = AI_PASSIVE;
 709                 hints.ai_socktype = SOCK_STREAM;
 710                 hints.ai_family = slap_inet4or6;
 711                 snprintf(serv, sizeof serv, "%d", port);
 712
 713                 if ( (err = getaddrinfo(host, serv, &hints, &res)) ) {
 714                         Debug( LDAP_DEBUG_ANY, "daemon: getaddrinfo() failed: %s\n",
 715                                 AC_GAI_STRERROR(err), 0, 0);
 716                         return -1;
 717                 }
 718
 719                 sai = res;
 720                 for (n=2; (sai = sai->ai_next) != NULL; n++) {
 721                         /* EMPTY */ ;
 722                 }
 723                 *sal = ch_calloc(n, sizeof(void *));
 724                 if (*sal == NULL) return -1;
 725
 726                 sap = *sal;
 727                 *sap = NULL;
 728
 729                 for ( sai=res; sai; sai=sai->ai_next ) {
 730                         if( sai->ai_addr == NULL ) {
 731                                 Debug( LDAP_DEBUG_ANY, "slap_get_listener_addresses: "
 732                                         "getaddrinfo ai_addr is NULL?\n", 0, 0, 0 );
 733                                 freeaddrinfo(res);
 734                                 goto errexit;
 735                         }
 736
 737                         switch (sai->ai_family) {
 738 #  ifdef LDAP_PF_INET6
 739                         case AF_INET6:
 740                                 *sap = ch_malloc(sizeof(struct sockaddr_in6));
 741                                 if (*sap == NULL) {
 742                                         freeaddrinfo(res);
 743                                         goto errexit;
 744                                 }
 745                                 *(struct sockaddr_in6 *)*sap =
 746                                         *((struct sockaddr_in6 *)sai->ai_addr);
 747                                 break;
 748 #  endif
 749                         case AF_INET:
 750                                 *sap = ch_malloc(sizeof(struct sockaddr_in));
 751                                 if (*sap == NULL) {
 752                                         freeaddrinfo(res);
 753                                         goto errexit;
 754                                 }
 755                                 *(struct sockaddr_in *)*sap =
 756                                         *((struct sockaddr_in *)sai->ai_addr);
 757                                 break;
 758                         default:
 759                                 *sap = NULL;
 760                                 break;
 761                         }
 762
 763                         if (*sap != NULL) {
 764                                 (*sap)->sa_family = sai->ai_family;
 765                                 sap++;
 766                                 *sap = NULL;
 767                         }
 768                 }
 769
 770                 freeaddrinfo(res);
 771
 772 #else
 773                 int i, n = 1;
 774                 struct in_addr in;
 775                 struct hostent *he = NULL;
 776
 777                 if ( host == NULL ) {
 778                         in.s_addr = htonl(INADDR_ANY);
 779
 780                 } else if ( !inet_aton( host, &in ) ) {
 781                         he = gethostbyname( host );
 782                         if( he == NULL ) {
 783                                 Debug( LDAP_DEBUG_ANY,
 784                                         "daemon: invalid host %s", host, 0, 0);
 785                                 return -1;
 786                         }
 787                         for (n = 0; he->h_addr_list[n]; n++) /* empty */;
 788                 }
 789
 790                 *sal = ch_malloc((n+1) * sizeof(void *));
 791                 if (*sal == NULL) return -1;
 792
 793                 sap = *sal;
 794                 for ( i = 0; i<n; i++ ) {
 795                         sap[i] = ch_malloc(sizeof(struct sockaddr_in));
 796                         if (*sap == NULL) goto errexit;
 797
 798                         (void)memset( (void *)sap[i], '\0', sizeof(struct sockaddr_in) );
 799                         sap[i]->sa_family = AF_INET;
 800                         ((struct sockaddr_in *)sap[i])->sin_port = htons(port);
 801                         AC_MEMCPY( &((struct sockaddr_in *)sap[i])->sin_addr,
 802                                 he ? he->h_addr_list[i] : &in, sizeof(struct in_addr) );
 803                 }
 804                 sap[i] = NULL;
 805 #endif
 806         }
 807
 808         return 0;
 809
 810 errexit:
 811         slap_free_listener_addresses(*sal);
 812         return -1;
 813 }
 814
 815 static int slap_open_listener(
 816         const char* url,
 817         int *listeners,
 818         int *cur
 819         )
 820 {
 821         int     num, tmp, rc;
 822         Listener l;
 823         Listener *li;
 824         LDAPURLDesc *lud;
 825         unsigned short port;
 826         int err, addrlen = 0;
 827         struct sockaddr **sal, **psal;
 828         int socktype = SOCK_STREAM;     /* default to COTS */
 829
 830 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
 831         /*
 832          * use safe defaults
 833          */
 834         int     crit = 1;
 835 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
 836
 837         rc = ldap_url_parse( url, &lud );
 838
 839         if( rc != LDAP_URL_SUCCESS ) {
 840                 Debug( LDAP_DEBUG_ANY,
 841                         "daemon: listen URL \"%s\" parse error=%d\n",
 842                         url, rc, 0 );
 843                 return rc;
 844         }
 845
 846         l.sl_url.bv_val = NULL;
 847         l.sl_mute = 0;
 848 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 849         l.sl_busy = 0;
 850 #endif
 851
 852 #ifndef HAVE_TLS
 853         if( ldap_pvt_url_scheme2tls( lud->lud_scheme ) ) {
 854                 Debug( LDAP_DEBUG_ANY, "daemon: TLS not supported (%s)\n",
 855                         url, 0, 0 );
 856                 ldap_free_urldesc( lud );
 857                 return -1;
 858         }
 859
 860         if(! lud->lud_port ) lud->lud_port = LDAP_PORT;
 861
 862 #else
 863         l.sl_is_tls = ldap_pvt_url_scheme2tls( lud->lud_scheme );
 864
 865         if(! lud->lud_port ) {
 866                 lud->lud_port = l.sl_is_tls ? LDAPS_PORT : LDAP_PORT;
 867         }
 868 #endif
 869
 870         port = (unsigned short) lud->lud_port;
 871
 872         tmp = ldap_pvt_url_scheme2proto(lud->lud_scheme);
 873         if ( tmp == LDAP_PROTO_IPC ) {
 874 #ifdef LDAP_PF_LOCAL
 875                 if ( lud->lud_host == NULL || lud->lud_host[0] == '\0' ) {
 876                         err = slap_get_listener_addresses(LDAPI_SOCK, 0, &sal);
 877                 } else {
 878                         err = slap_get_listener_addresses(lud->lud_host, 0, &sal);
 879                 }
 880 #else
 881
 882                 Debug( LDAP_DEBUG_ANY, "daemon: URL scheme not supported: %s",
 883                         url, 0, 0);
 884                 ldap_free_urldesc( lud );
 885                 return -1;
 886 #endif
 887         } else {
 888                 if( lud->lud_host == NULL || lud->lud_host[0] == '\0'
 889                         || strcmp(lud->lud_host, "*") == 0 )
 890                 {
 891                         err = slap_get_listener_addresses(NULL, port, &sal);
 892                 } else {
 893                         err = slap_get_listener_addresses(lud->lud_host, port, &sal);
 894                 }
 895         }
 896
 897 #ifdef LDAP_CONNECTIONLESS
 898         l.sl_is_udp = ( tmp == LDAP_PROTO_UDP );
 899 #endif
 900
 901 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
 902         if ( lud->lud_exts ) {
 903                 err = get_url_perms( lud->lud_exts, &l.sl_perms, &crit );
 904         } else {
 905                 l.sl_perms = S_IRWXU | S_IRWXO;
 906         }
 907 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
 908
 909         ldap_free_urldesc( lud );
 910         if ( err ) return -1;
 911
 912         /* If we got more than one address returned, we need to make space
 913          * for it in the slap_listeners array.
 914          */
 915         for ( num=0; sal[num]; num++ ) /* empty */;
 916         if ( num > 1 ) {
 917                 *listeners += num-1;
 918                 slap_listeners = ch_realloc( slap_listeners,
 919                         (*listeners + 1) * sizeof(Listener *) );
 920         }
 921
 922         psal = sal;
 923         while ( *sal != NULL ) {
 924                 char *af;
 925                 switch( (*sal)->sa_family ) {
 926                 case AF_INET:
 927                         af = "IPv4";
 928                         break;
 929 #ifdef LDAP_PF_INET6
 930                 case AF_INET6:
 931                         af = "IPv6";
 932                         break;
 933 #endif
 934 #ifdef LDAP_PF_LOCAL
 935                 case AF_LOCAL:
 936                         af = "Local";
 937                         break;
 938 #endif
 939                 default:
 940                         sal++;
 941                         continue;
 942                 }
 943
 944 #ifdef LDAP_CONNECTIONLESS
 945                 if( l.sl_is_udp ) socktype = SOCK_DGRAM;
 946 #endif
 947
 948                 l.sl_sd = socket( (*sal)->sa_family, socktype, 0);
 949                 if ( l.sl_sd == AC_SOCKET_INVALID ) {
 950                         int err = sock_errno();
 951                         Debug( LDAP_DEBUG_ANY,
 952                                 "daemon: %s socket() failed errno=%d (%s)\n",
 953                                 af, err, sock_errstr(err) );
 954                         sal++;
 955                         continue;
 956                 }
 957
 958 #ifndef HAVE_WINSOCK
 959                 if ( l.sl_sd >= dtblsize ) {
 960                         Debug( LDAP_DEBUG_ANY,
 961                                 "daemon: listener descriptor %ld is too great %ld\n",
 962                                 (long) l.sl_sd, (long) dtblsize, 0 );
 963                         tcp_close( l.sl_sd );
 964                         sal++;
 965                         continue;
 966                 }
 967 #endif
 968
 969 #ifdef LDAP_PF_LOCAL
 970                 if ( (*sal)->sa_family == AF_LOCAL ) {
 971                         unlink( ((struct sockaddr_un *)*sal)->sun_path );
 972                 } else
 973 #endif
 974                 {
 975 #ifdef SO_REUSEADDR
 976                         /* enable address reuse */
 977                         tmp = 1;
 978                         rc = setsockopt( l.sl_sd, SOL_SOCKET, SO_REUSEADDR,
 979                                 (char *) &tmp, sizeof(tmp) );
 980                         if ( rc == AC_SOCKET_ERROR ) {
 981                                 int err = sock_errno();
 982                                 Debug( LDAP_DEBUG_ANY, "slapd(%ld): "
 983                                         "setsockopt(SO_REUSEADDR) failed errno=%d (%s)\n",
 984                                         (long) l.sl_sd, err, sock_errstr(err) );
 985                         }
 986 #endif
 987                 }
 988
 989                 switch( (*sal)->sa_family ) {
 990                 case AF_INET:
 991                         addrlen = sizeof(struct sockaddr_in);
 992                         break;
 993 #ifdef LDAP_PF_INET6
 994                 case AF_INET6:
 995 #ifdef IPV6_V6ONLY
 996                         /* Try to use IPv6 sockets for IPv6 only */
 997                         tmp = 1;
 998                         rc = setsockopt( l.sl_sd, IPPROTO_IPV6, IPV6_V6ONLY,
 999                                 (char *) &tmp, sizeof(tmp) );
1000                         if ( rc == AC_SOCKET_ERROR ) {
1001                                 int err = sock_errno();
1002                                 Debug( LDAP_DEBUG_ANY, "slapd(%ld): "
1003                                         "setsockopt(IPV6_V6ONLY) failed errno=%d (%s)\n",
1004                                         (long) l.sl_sd, err, sock_errstr(err) );
1005                         }
1006 #endif
1007                         addrlen = sizeof(struct sockaddr_in6);
1008                         break;
1009 #endif
1010
1011 #ifdef LDAP_PF_LOCAL
1012                 case AF_LOCAL:
1013 #ifdef LOCAL_CREDS
1014                 {
1015                         int one = 1;
1016                         setsockopt(l.sl_sd, 0, LOCAL_CREDS, &one, sizeof one);
1017                 }
1018 #endif
1019                 addrlen = sizeof(struct sockaddr_un);
1020                 break;
1021 #endif
1022                 }
1023
1024                 if (bind(l.sl_sd, *sal, addrlen)) {
1025                         err = sock_errno();
1026                         Debug( LDAP_DEBUG_ANY,
1027                                 "daemon: bind(%ld) failed errno=%d (%s)\n",
1028                                 (long) l.sl_sd, err, sock_errstr(err) );
1029                         tcp_close( l.sl_sd );
1030                         sal++;
1031                         continue;
1032                 }
1033
1034                 switch ( (*sal)->sa_family ) {
1035 #ifdef LDAP_PF_LOCAL
1036                 case AF_LOCAL: {
1037                         char *addr = ((struct sockaddr_un *)*sal)->sun_path;
1038                         l.sl_name.bv_len = strlen(addr) + sizeof("PATH=") - 1;
1039                         l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len + 1 );
1040                         snprintf( l.sl_name.bv_val, l.sl_name.bv_len + 1,
1041                                 "PATH=%s", addr );
1042                 } break;
1043 #endif /* LDAP_PF_LOCAL */
1044
1045                 case AF_INET: {
1046                         char *s;
1047 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
1048                         char addr[INET_ADDRSTRLEN];
1049                         inet_ntop( AF_INET, &((struct sockaddr_in *)*sal)->sin_addr,
1050                                 addr, sizeof(addr) );
1051                         s = addr;
1052 #else
1053                         s = inet_ntoa( ((struct sockaddr_in *) *sal)->sin_addr );
1054 #endif
1055                         port = ntohs( ((struct sockaddr_in *)*sal) ->sin_port );
1056                         l.sl_name.bv_val =
1057                                 ber_memalloc( sizeof("IP=255.255.255.255:65535") );
1058                         snprintf( l.sl_name.bv_val, sizeof("IP=255.255.255.255:65535"),
1059                                 "IP=%s:%d",
1060                                  s != NULL ? s : SLAP_STRING_UNKNOWN, port );
1061                         l.sl_name.bv_len = strlen( l.sl_name.bv_val );
1062                 } break;
1063
1064 #ifdef LDAP_PF_INET6
1065                 case AF_INET6: {
1066                         char addr[INET6_ADDRSTRLEN];
1067                         inet_ntop( AF_INET6, &((struct sockaddr_in6 *)*sal)->sin6_addr,
1068                                 addr, sizeof addr);
1069                         port = ntohs( ((struct sockaddr_in6 *)*sal)->sin6_port );
1070                         l.sl_name.bv_len = strlen(addr) + sizeof("IP= 65535");
1071                         l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len );
1072                         snprintf( l.sl_name.bv_val, l.sl_name.bv_len, "IP=%s %d",
1073                                 addr, port );
1074                         l.sl_name.bv_len = strlen( l.sl_name.bv_val );
1075                 } break;
1076 #endif /* LDAP_PF_INET6 */
1077
1078                 default:
1079                         Debug( LDAP_DEBUG_ANY, "daemon: unsupported address family (%d)\n",
1080                                 (int) (*sal)->sa_family, 0, 0 );
1081                         break;
1082                 }
1083
1084                 AC_MEMCPY(&l.sl_sa, *sal, addrlen);
1085                 ber_str2bv( url, 0, 1, &l.sl_url);
1086                 li = ch_malloc( sizeof( Listener ) );
1087                 *li = l;
1088                 slap_listeners[*cur] = li;
1089                 (*cur)++;
1090                 sal++;
1091         }
1092
1093         slap_free_listener_addresses(psal);
1094
1095         if ( l.sl_url.bv_val == NULL ) {
1096                 Debug( LDAP_DEBUG_TRACE,
1097                         "slap_open_listener: failed on %s\n", url, 0, 0 );
1098                 return -1;
1099         }
1100
1101 #ifdef LDAP_CONNECTIONLESS
1102         if( l.sl_is_udp ) {
1103                 long id = connection_init( l.sl_sd, &l, "", "", CONN_IS_UDP,
1104                         (slap_ssf_t) 0, NULL );
1105
1106                 if( id < 0 ) {
1107                         Debug( LDAP_DEBUG_TRACE,
1108                                 "slap_open_listener: connectionless init failed on %s (%d)\n",
1109                                 url, l.sl_sd, 0 );
1110                         return -1;
1111                 }
1112                 l.sl_is_udp++;
1113         }
1114 #endif
1115
1116         Debug( LDAP_DEBUG_TRACE, "daemon: listener initialized %s\n",
1117                 l.sl_url.bv_val, 0, 0 );
1118         return 0;
1119 }
1120
1121 static int sockinit(void);
1122 static int sockdestroy(void);
1123
1124 int slapd_daemon_init( const char *urls )
1125 {
1126         int i, j, n, rc;
1127         char **u;
1128
1129         Debug( LDAP_DEBUG_ARGS, "daemon_init: %s\n",
1130                 urls ? urls : "<null>", 0, 0 );
1131         if( (rc = sockinit()) != 0 ) return rc;
1132
1133 #ifdef HAVE_SYSCONF
1134         dtblsize = sysconf( _SC_OPEN_MAX );
1135 #elif HAVE_GETDTABLESIZE
1136         dtblsize = getdtablesize();
1137 #else
1138         dtblsize = FD_SETSIZE;
1139 #endif
1140
1141         /* open a pipe (or something equivalent connected to itself).
1142          * we write a byte on this fd whenever we catch a signal. The main
1143          * loop will be select'ing on this socket, and will wake up when
1144          * this byte arrives.
1145          */
1146         if( (rc = lutil_pair( wake_sds )) < 0 ) {
1147                 Debug( LDAP_DEBUG_ANY,
1148                         "daemon: lutil_pair() failed rc=%d\n", rc, 0, 0 );
1149                 return rc;
1150         }
1151
1152         SLAP_SOCK_SET_INIT;
1153
1154         if( urls == NULL ) urls = "ldap:///";
1155
1156         u = ldap_str2charray( urls, " " );
1157
1158         if( u == NULL || u[0] == NULL ) {
1159                 Debug( LDAP_DEBUG_ANY, "daemon_init: no urls (%s) provided.\n",
1160                         urls, 0, 0 );
1161                 return -1;
1162         }
1163
1164         for( i=0; u[i] != NULL; i++ ) {
1165                 Debug( LDAP_DEBUG_TRACE, "daemon_init: listen on %s\n",
1166                         u[i], 0, 0 );
1167         }
1168
1169         if( i == 0 ) {
1170                 Debug( LDAP_DEBUG_ANY, "daemon_init: no listeners to open (%s)\n",
1171                         urls, 0, 0 );
1172                 ldap_charray_free( u );
1173                 return -1;
1174         }
1175
1176         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners to open...\n",
1177                 i, 0, 0 );
1178         slap_listeners = ch_malloc( (i+1)*sizeof(Listener *) );
1179
1180         for(n = 0, j = 0; u[n]; n++ ) {
1181                 if ( slap_open_listener( u[n], &i, &j ) ) {
1182                         ldap_charray_free( u );
1183                         return -1;
1184                 }
1185         }
1186         slap_listeners[j] = NULL;
1187
1188         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners opened\n",
1189                 i, 0, 0 );
1190
1191
1192 #ifdef HAVE_SLP
1193         if( slapd_register_slp ) {
1194                 slapd_slp_init( urls );
1195                 slapd_slp_reg();
1196         }
1197 #endif
1198
1199         ldap_charray_free( u );
1200         ldap_pvt_thread_mutex_init( &slap_daemon.sd_mutex );
1201
1202 #ifdef HAVE_TCPD
1203         ldap_pvt_thread_mutex_init( &slap_daemon.tcpd_mutex );
1204 #endif
1205
1206         return !i;
1207 }
1208
1209
1210 int
1211 slapd_daemon_destroy(void)
1212 {
1213         connections_destroy();
1214         tcp_close( wake_sds[1] );
1215         tcp_close( wake_sds[0] );
1216         sockdestroy();
1217
1218 #ifdef HAVE_SLP
1219         if( slapd_register_slp ) {
1220                 slapd_slp_dereg();
1221                 slapd_slp_deinit();
1222         }
1223 #endif
1224
1225 #ifdef HAVE_TCPD
1226         ldap_pvt_thread_mutex_destroy( &slap_daemon.tcpd_mutex );
1227 #endif
1228
1229         ldap_pvt_thread_mutex_destroy( &slap_daemon.sd_mutex );
1230         return 0;
1231 }
1232
1233
1234 static void
1235 close_listeners(
1236         int remove )
1237 {
1238         int l;
1239
1240         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1241                 Listener *lr = slap_listeners[l];
1242
1243                 if ( lr->sl_sd != AC_SOCKET_INVALID ) {
1244                         if ( remove ) slapd_remove( lr->sl_sd, 0, 0, 0 );
1245
1246 #ifdef LDAP_PF_LOCAL
1247                         if ( lr->sl_sa.sa_addr.sa_family == AF_LOCAL ) {
1248                                 unlink( lr->sl_sa.sa_un_addr.sun_path );
1249                         }
1250 #endif /* LDAP_PF_LOCAL */
1251
1252                         slapd_close( lr->sl_sd );
1253                 }
1254
1255                 if ( lr->sl_url.bv_val ) {
1256                         ber_memfree( lr->sl_url.bv_val );
1257                 }
1258
1259                 if ( lr->sl_name.bv_val ) {
1260                         ber_memfree( lr->sl_name.bv_val );
1261                 }
1262
1263                 free( lr );
1264                 slap_listeners[l] = NULL;
1265         }
1266 }
1267
1268 static int
1269 slap_listener(
1270         Listener *sl )
1271 {
1272         Sockaddr                from;
1273
1274         ber_socket_t s;
1275         socklen_t len = sizeof(from);
1276         long id;
1277         slap_ssf_t ssf = 0;
1278         struct berval authid = BER_BVNULL;
1279 #ifdef SLAPD_RLOOKUPS
1280         char hbuf[NI_MAXHOST];
1281 #endif
1282
1283         char    *dnsname = NULL;
1284         char    *peeraddr = NULL;
1285 #ifdef LDAP_PF_LOCAL
1286         char peername[MAXPATHLEN + sizeof("PATH=")];
1287 #elif defined(LDAP_PF_INET6)
1288         char peername[sizeof("IP=ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 65535")];
1289 #else
1290         char peername[sizeof("IP=255.255.255.255:65336")];
1291 #endif /* LDAP_PF_LOCAL */
1292
1293         peername[0] = '\0';
1294
1295 #ifdef LDAP_CONNECTIONLESS
1296         if ( sl->sl_is_udp ) return 1;
1297 #endif
1298
1299 #  ifdef LDAP_PF_LOCAL
1300         /* FIXME: apparently accept doesn't fill
1301          * the sun_path sun_path member */
1302         from.sa_un_addr.sun_path[0] = '\0';
1303 #  endif /* LDAP_PF_LOCAL */
1304
1305         s = accept( sl->sl_sd, (struct sockaddr *) &from, &len );
1306
1307 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1308         /* Resume the listener FD to allow concurrent-processing of
1309          * additional incoming connections.
1310          */
1311         sl->sl_busy = 0;
1312         WAKE_LISTENER(1);
1313 #endif
1314
1315         if ( s == AC_SOCKET_INVALID ) {
1316                 int err = sock_errno();
1317
1318                 if(
1319 #ifdef EMFILE
1320                     err == EMFILE ||
1321 #endif
1322 #ifdef ENFILE
1323                     err == ENFILE ||
1324 #endif
1325                     0 )
1326                 {
1327                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1328                         emfile++;
1329                         /* Stop listening until an existing session closes */
1330                         sl->sl_mute = 1;
1331                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1332                 }
1333
1334                 Debug( LDAP_DEBUG_ANY,
1335                         "daemon: accept(%ld) failed errno=%d (%s)\n",
1336                         (long) sl->sl_sd, err, sock_errstr(err) );
1337                 ldap_pvt_thread_yield();
1338                 return 0;
1339         }
1340
1341 #ifndef HAVE_WINSOCK
1342         /* make sure descriptor number isn't too great */
1343         if ( s >= dtblsize ) {
1344                 Debug( LDAP_DEBUG_ANY,
1345                         "daemon: %ld beyond descriptor table size %ld\n",
1346                         (long) s, (long) dtblsize, 0 );
1347
1348                 slapd_close(s);
1349                 ldap_pvt_thread_yield();
1350                 return 0;
1351         }
1352 #endif
1353
1354 #ifdef LDAP_DEBUG
1355         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1356         /* newly accepted stream should not be in any of the FD SETS */
1357         assert( SLAP_SOCK_NOT_ACTIVE( s ));
1358         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1359 #endif
1360
1361 #if defined( SO_KEEPALIVE ) || defined( TCP_NODELAY )
1362 #ifdef LDAP_PF_LOCAL
1363         /* for IPv4 and IPv6 sockets only */
1364         if ( from.sa_addr.sa_family != AF_LOCAL )
1365 #endif /* LDAP_PF_LOCAL */
1366         {
1367                 int rc;
1368                 int tmp;
1369 #ifdef SO_KEEPALIVE
1370                 /* enable keep alives */
1371                 tmp = 1;
1372                 rc = setsockopt( s, SOL_SOCKET, SO_KEEPALIVE,
1373                         (char *) &tmp, sizeof(tmp) );
1374                 if ( rc == AC_SOCKET_ERROR ) {
1375                         int err = sock_errno();
1376                         Debug( LDAP_DEBUG_ANY,
1377                                 "slapd(%ld): setsockopt(SO_KEEPALIVE) failed "
1378                                 "errno=%d (%s)\n", (long) s, err, sock_errstr(err) );
1379                 }
1380 #endif
1381 #ifdef TCP_NODELAY
1382                 /* enable no delay */
1383                 tmp = 1;
1384                 rc = setsockopt( s, IPPROTO_TCP, TCP_NODELAY,
1385                         (char *)&tmp, sizeof(tmp) );
1386                 if ( rc == AC_SOCKET_ERROR ) {
1387                         int err = sock_errno();
1388                         Debug( LDAP_DEBUG_ANY,
1389                                 "slapd(%ld): setsockopt(TCP_NODELAY) failed "
1390                                 "errno=%d (%s)\n", (long) s, err, sock_errstr(err) );
1391                 }
1392 #endif
1393         }
1394 #endif
1395
1396         Debug( LDAP_DEBUG_CONNS,
1397                 "daemon: listen=%ld, new connection on %ld\n",
1398                 (long) sl->sl_sd, (long) s, 0 );
1399
1400         switch ( from.sa_addr.sa_family ) {
1401 #  ifdef LDAP_PF_LOCAL
1402         case AF_LOCAL:
1403                 /* FIXME: apparently accept doesn't fill
1404                  * the sun_path sun_path member */
1405                 if ( from.sa_un_addr.sun_path[0] == '\0' ) {
1406                         AC_MEMCPY( from.sa_un_addr.sun_path,
1407                                         sl->sl_sa.sa_un_addr.sun_path,
1408                                         sizeof( from.sa_un_addr.sun_path ) );
1409                 }
1410
1411                 sprintf( peername, "PATH=%s", from.sa_un_addr.sun_path );
1412                 ssf = local_ssf;
1413                 {
1414                         uid_t uid;
1415                         gid_t gid;
1416
1417                         if( getpeereid( s, &uid, &gid ) == 0 ) {
1418                                 authid.bv_val = ch_malloc(
1419                                         STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
1420                                         "cn=peercred,cn=external,cn=auth" ) + 1 );
1421                                 authid.bv_len = sprintf( authid.bv_val,
1422                                         "gidNumber=%d+uidNumber=%d,"
1423                                         "cn=peercred,cn=external,cn=auth",
1424                                         (int) gid, (int) uid );
1425                                 assert( authid.bv_len <=
1426                                         STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
1427                                         "cn=peercred,cn=external,cn=auth" ) );
1428                         }
1429                 }
1430                 dnsname = "local";
1431                 break;
1432 #endif /* LDAP_PF_LOCAL */
1433
1434 #  ifdef LDAP_PF_INET6
1435         case AF_INET6:
1436         if ( IN6_IS_ADDR_V4MAPPED(&from.sa_in6_addr.sin6_addr) ) {
1437                 peeraddr = inet_ntoa( *((struct in_addr *)
1438                                         &from.sa_in6_addr.sin6_addr.s6_addr[12]) );
1439                 sprintf( peername, "IP=%s:%d",
1440                          peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1441                          (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
1442         } else {
1443                 char addr[INET6_ADDRSTRLEN];
1444
1445                 peeraddr = (char *) inet_ntop( AF_INET6,
1446                                       &from.sa_in6_addr.sin6_addr,
1447                                       addr, sizeof addr );
1448                 sprintf( peername, "IP=%s %d",
1449                          peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1450                          (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
1451         }
1452         break;
1453 #  endif /* LDAP_PF_INET6 */
1454
1455         case AF_INET:
1456         peeraddr = inet_ntoa( from.sa_in_addr.sin_addr );
1457         sprintf( peername, "IP=%s:%d",
1458                 peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1459                 (unsigned) ntohs( from.sa_in_addr.sin_port ) );
1460                 break;
1461
1462         default:
1463                 slapd_close(s);
1464                 return 0;
1465         }
1466
1467         if ( ( from.sa_addr.sa_family == AF_INET )
1468 #ifdef LDAP_PF_INET6
1469                 || ( from.sa_addr.sa_family == AF_INET6 )
1470 #endif
1471                 )
1472         {
1473                 dnsname = NULL;
1474 #ifdef SLAPD_RLOOKUPS
1475                 if ( use_reverse_lookup ) {
1476                         char *herr;
1477                         if (ldap_pvt_get_hname( (const struct sockaddr *)&from, len, hbuf,
1478                                 sizeof(hbuf), &herr ) == 0) {
1479                                 ldap_pvt_str2lower( hbuf );
1480                                 dnsname = hbuf;
1481                         }
1482                 }
1483 #endif /* SLAPD_RLOOKUPS */
1484
1485 #ifdef HAVE_TCPD
1486                 {
1487                         int rc;
1488                         ldap_pvt_thread_mutex_lock( &slap_daemon.tcpd_mutex );
1489                         rc = hosts_ctl("slapd",
1490                                 dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1491                                 peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1492                                 SLAP_STRING_UNKNOWN );
1493                         ldap_pvt_thread_mutex_unlock( &slap_daemon.tcpd_mutex );
1494                         if ( !rc ) {
1495                                 /* DENY ACCESS */
1496                                 Statslog( LDAP_DEBUG_STATS,
1497                                         "fd=%ld DENIED from %s (%s)\n",
1498                                         (long) s,
1499                                         dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1500                                         peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1501                                         0, 0 );
1502                                 slapd_close(s);
1503                                 return 0;
1504                         }
1505                 }
1506 #endif /* HAVE_TCPD */
1507         }
1508
1509         id = connection_init(s, sl,
1510                 dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1511                 peername,
1512 #ifdef HAVE_TLS
1513                 sl->sl_is_tls ? CONN_IS_TLS : 0,
1514 #else
1515                 0,
1516 #endif
1517                 ssf,
1518                 authid.bv_val ? &authid : NULL );
1519
1520         if( authid.bv_val ) ch_free(authid.bv_val);
1521
1522         if( id < 0 ) {
1523                 Debug( LDAP_DEBUG_ANY,
1524                         "daemon: connection_init(%ld, %s, %s) failed.\n",
1525                         (long) s, peername, sl->sl_name.bv_val );
1526                 slapd_close(s);
1527                 return 0;
1528         }
1529
1530         Statslog( LDAP_DEBUG_STATS,
1531                 "conn=%ld fd=%ld ACCEPT from %s (%s)\n",
1532                 id, (long) s, peername, sl->sl_name.bv_val,
1533                 0 );
1534
1535         return 0;
1536 }
1537
1538 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1539 static void*
1540 slap_listener_thread(
1541         void* ctx,
1542         void* ptr )
1543 {
1544         int rc;
1545
1546         rc = slap_listener( (Listener*)ptr );
1547
1548         if( rc != LDAP_SUCCESS ) {
1549                 Debug( LDAP_DEBUG_ANY,
1550                         "listener_thread: failed %d", rc, 0, 0 );
1551         }
1552
1553         return (void*)NULL;
1554 }
1555
1556 static int
1557 slap_listener_activate(
1558         Listener* sl )
1559 {
1560         int rc;
1561
1562         Debug( LDAP_DEBUG_TRACE, "slap_listener_activate(%d): %s\n",
1563                 sl->sl_sd, sl->sl_busy ? "busy" : "", 0 );
1564
1565         sl->sl_busy++;
1566
1567         rc = ldap_pvt_thread_pool_submit( &connection_pool,
1568                 slap_listener_thread, (void *) sl );
1569
1570         if( rc != 0 ) {
1571                 Debug( LDAP_DEBUG_ANY,
1572                         "listener_activate(%d): submit failed (%d)\n",
1573                         sl->sl_sd, rc, 0 );
1574         }
1575         return rc;
1576 }
1577 #endif
1578
1579 static void *
1580 slapd_daemon_task(
1581         void *ptr )
1582 {
1583         int l;
1584         time_t last_idle_check = 0;
1585         struct timeval idle;
1586         int ebadf = 0;
1587
1588 #define SLAPD_IDLE_CHECK_LIMIT 4
1589
1590         if ( global_idletimeout > 0 ) {
1591                 last_idle_check = slap_get_time();
1592                 /* Set the select timeout.
1593                  * Don't just truncate, preserve the fractions of
1594                  * seconds to prevent sleeping for zero time.
1595                  */
1596                 idle.tv_sec = global_idletimeout / SLAPD_IDLE_CHECK_LIMIT;
1597                 idle.tv_usec = global_idletimeout - \
1598                         ( idle.tv_sec * SLAPD_IDLE_CHECK_LIMIT );
1599                 idle.tv_usec *= 1000000 / SLAPD_IDLE_CHECK_LIMIT;
1600         } else {
1601                 idle.tv_sec = 0;
1602                 idle.tv_usec = 0;
1603         }
1604
1605         slapd_add( wake_sds[0], 0, NULL );
1606
1607         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1608                 if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) continue;
1609
1610 #ifdef LDAP_CONNECTIONLESS
1611                 /* Since this is connectionless, the data port is the
1612                  * listening port. The listen() and accept() calls
1613                  * are unnecessary.
1614                  */
1615                 if ( slap_listeners[l]->sl_is_udp ) {
1616                         slapd_add( slap_listeners[l]->sl_sd, 1, slap_listeners[l] );
1617                         continue;
1618                 }
1619 #endif
1620
1621                 if ( listen( slap_listeners[l]->sl_sd, SLAPD_LISTEN_BACKLOG ) == -1 ) {
1622                         int err = sock_errno();
1623
1624 #ifdef LDAP_PF_INET6
1625                         /* If error is EADDRINUSE, we are trying to listen to INADDR_ANY and
1626                          * we are already listening to in6addr_any, then we want to ignore
1627                          * this and continue.
1628                          */
1629                         if ( err == EADDRINUSE ) {
1630                                 int i;
1631                                 struct sockaddr_in sa = slap_listeners[l]->sl_sa.sa_in_addr;
1632                                 struct sockaddr_in6 sa6;
1633
1634                                 if ( sa.sin_family == AF_INET &&
1635                                      sa.sin_addr.s_addr == htonl(INADDR_ANY) ) {
1636                                         for ( i = 0 ; i < l; i++ ) {
1637                                                 sa6 = slap_listeners[i]->sl_sa.sa_in6_addr;
1638                                                 if ( sa6.sin6_family == AF_INET6 &&
1639                                                      !memcmp( &sa6.sin6_addr, &in6addr_any,
1640                                                                 sizeof(struct in6_addr) ) )
1641                                                 {
1642                                                         break;
1643                                                 }
1644                                         }
1645
1646                                         if ( i < l ) {
1647                                                 /* We are already listening to in6addr_any */
1648                                                 Debug( LDAP_DEBUG_CONNS,
1649                                                         "daemon: Attempt to listen to 0.0.0.0 failed, "
1650                                                         "already listening on ::, assuming IPv4 included\n",
1651                                                         0, 0, 0 );
1652                                                 slapd_close( slap_listeners[l]->sl_sd );
1653                                                 slap_listeners[l]->sl_sd = AC_SOCKET_INVALID;
1654                                                 continue;
1655                                         }
1656                                 }
1657                         }
1658 #endif
1659                         Debug( LDAP_DEBUG_ANY,
1660                                 "daemon: listen(%s, 5) failed errno=%d (%s)\n",
1661                                         slap_listeners[l]->sl_url.bv_val, err,
1662                                         sock_errstr(err) );
1663                         return (void*)-1;
1664                 }
1665
1666 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1667                 /* make the listening socket non-blocking */
1668                 if ( ber_pvt_socket_set_nonblock( slap_listeners[l]->sl_sd, 1 ) < 0 ) {
1669                         Debug( LDAP_DEBUG_ANY, "slapd_daemon_task: "
1670                                 "set nonblocking on a listening socket failed\n",
1671                                 0, 0, 0 );
1672                         slapd_shutdown = 2;
1673                         return (void*)-1;
1674                 }
1675 #endif
1676
1677                 slapd_add( slap_listeners[l]->sl_sd, 0, slap_listeners[l] );
1678         }
1679
1680 #ifdef HAVE_NT_SERVICE_MANAGER
1681         if ( started_event != NULL ) {
1682                 ldap_pvt_thread_cond_signal( &started_event );
1683         }
1684 #endif
1685
1686 #ifdef SLAP_SEM_LOAD_CONTROL
1687         /*
1688          * initialize count and lazyness of a semaphore
1689          */
1690         (void) ldap_lazy_sem_init(
1691                 SLAP_MAX_WORKER_THREADS + 4 /* max workers + margin */,
1692                 4 /* lazyness */ );
1693 #endif
1694
1695         /* initialization complete. Here comes the loop. */
1696
1697         while ( !slapd_shutdown ) {
1698                 ber_socket_t i;
1699                 int ns, nwriters;
1700                 int at;
1701                 ber_socket_t nfds;
1702 #if SLAP_EVENTS_ARE_INDEXED
1703                 ber_socket_t nrfds, nwfds;
1704 #endif
1705 #define SLAPD_EBADF_LIMIT 16
1706
1707                 time_t  now;
1708
1709                 SLAP_EVENT_DECL;
1710
1711                 struct timeval          tv;
1712                 struct timeval          *tvp;
1713
1714                 struct timeval          *cat;
1715                 time_t                          tdelta = 1;
1716                 struct re_s*            rtask;
1717                 now = slap_get_time();
1718
1719                 if( ( global_idletimeout > 0 ) &&
1720                         difftime( last_idle_check +
1721                         global_idletimeout/SLAPD_IDLE_CHECK_LIMIT, now ) < 0 ) {
1722                         connections_timeout_idle( now );
1723                         last_idle_check = now;
1724                 }
1725                 tv = idle;
1726
1727 #ifdef SIGHUP
1728                 if( slapd_gentle_shutdown ) {
1729                         ber_socket_t active;
1730
1731                         if( slapd_gentle_shutdown == 1 ) {
1732                                 BackendDB *be;
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                                 LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
1737                                         be->be_restrictops |= SLAP_RESTRICT_OP_WRITES;
1738                                 }
1739                                 slapd_gentle_shutdown = 2;
1740                         }
1741
1742                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1743                         active = slap_daemon.sd_nactives;
1744                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1745                         if( active == 0 ) {
1746                                 slapd_shutdown = 1;
1747                                 break;
1748                         }
1749                 }
1750 #endif
1751                 at = 0;
1752
1753                 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1754
1755                 nwriters = slap_daemon.sd_nwriters;
1756
1757                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1758                         Listener *lr = slap_listeners[l];
1759
1760                         if ( lr->sl_sd == AC_SOCKET_INVALID ) continue;
1761
1762 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1763                         if ( lr->sl_mute || lr->sl_busy )
1764 #else
1765                         if ( lr->sl_mute )
1766 #endif
1767                         {
1768                             SLAP_SOCK_CLR_READ( lr->sl_sd );
1769                         } else {
1770                                 SLAP_SOCK_SET_READ( lr->sl_sd );
1771                         }
1772                 }
1773
1774                 SLAP_EVENT_INIT;
1775
1776                 nfds = SLAP_EVENT_MAX;
1777
1778                 if ( global_idletimeout && slap_daemon.sd_nactives ) at = 1;
1779
1780                 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1781
1782                 if ( at
1783 #if defined(HAVE_YIELDING_SELECT) || defined(NO_THREADS)
1784                         &&  ( tv.tv_sec || tv.tv_usec )
1785 #endif
1786                         )
1787                 {
1788                         tvp = &tv;
1789                 } else {
1790                         tvp = NULL;
1791                 }
1792
1793                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
1794                 rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
1795                 while ( cat && cat->tv_sec && cat->tv_sec <= now ) {
1796                         if ( ldap_pvt_runqueue_isrunning( &slapd_rq, rtask )) {
1797                                 ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
1798                         } else {
1799                                 ldap_pvt_runqueue_runtask( &slapd_rq, rtask );
1800                                 ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
1801                                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
1802                                 ldap_pvt_thread_pool_submit( &connection_pool,
1803                                                                                         rtask->routine, (void *) rtask );
1804                                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
1805                         }
1806                         rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
1807                 }
1808                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
1809
1810                 if ( cat && cat->tv_sec ) {
1811                         time_t diff = difftime( cat->tv_sec, now );
1812                         if ( diff == 0 ) diff = tdelta;
1813                         if ( tvp == NULL || diff < tv.tv_sec ) {
1814                                 tv.tv_sec = diff;
1815                                 tv.tv_usec = 0;
1816                                 tvp = &tv;
1817                         }
1818                 }
1819
1820                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1821                         Listener *lr = slap_listeners[l];
1822
1823                         if ( lr->sl_sd == AC_SOCKET_INVALID ) {
1824                                 continue;
1825                         }
1826
1827                         if ( lr->sl_mute ) {
1828                                 Debug( LDAP_DEBUG_CONNS,
1829                                         "daemon: select: listen=%d muted\n",
1830                                         lr->sl_sd, 0, 0 );
1831                                 continue;
1832                         }
1833
1834 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1835                         if ( lr->sl_busy ) {
1836                                 Debug( LDAP_DEBUG_CONNS,
1837                                         "daemon: select: listen=%d busy\n",
1838                                         lr->sl_sd, 0, 0 );
1839                                 continue;
1840                         }
1841 #endif
1842
1843                         Debug( LDAP_DEBUG_CONNS,
1844                                 "daemon: select: listen=%d active_threads=%d tvp=%s\n",
1845                                 lr->sl_sd, at, tvp == NULL ? "NULL" : "zero" );
1846                 }
1847
1848                 switch(ns = SLAP_EVENT_WAIT(tvp)) {
1849                 case -1: {      /* failure - try again */
1850                                 int err = sock_errno();
1851
1852                                 if( err == EBADF
1853 #ifdef WSAENOTSOCK
1854                                         /* you'd think this would be EBADF */
1855                                         || err == WSAENOTSOCK
1856 #endif
1857                                 ) {
1858                                         if (++ebadf < SLAPD_EBADF_LIMIT)
1859                                                 continue;
1860                                 }
1861
1862                                 if( err != EINTR ) {
1863                                         Debug( LDAP_DEBUG_CONNS,
1864                                                 "daemon: select failed (%d): %s\n",
1865                                                 err, sock_errstr(err), 0 );
1866                                         slapd_shutdown = 2;
1867                                 }
1868                         }
1869                         continue;
1870
1871                 case 0:         /* timeout - let threads run */
1872                         ebadf = 0;
1873 #ifndef HAVE_YIELDING_SELECT
1874                         Debug( LDAP_DEBUG_CONNS, "daemon: select timeout - yielding\n",
1875                             0, 0, 0 );
1876
1877                         ldap_pvt_thread_yield();
1878 #endif
1879                         continue;
1880
1881                 default:        /* something happened - deal with it */
1882                         if( slapd_shutdown ) continue;
1883
1884                         ebadf = 0;
1885                         Debug( LDAP_DEBUG_CONNS,
1886                                 "daemon: activity on %d descriptor%s\n",
1887                                 ns, ns != 1 ? "s" : "", 0 );
1888                         /* FALL THRU */
1889                 }
1890
1891 #if SLAP_EVENTS_ARE_INDEXED
1892                 if ( SLAP_EVENT_IS_READ( wake_sds[0] )) {
1893                         char c[BUFSIZ];
1894                         SLAP_EVENT_CLR_READ( wake_sds[0] );
1895                         waking = 0;
1896                         tcp_read( wake_sds[0], c, sizeof(c) );
1897                         Debug( LDAP_DEBUG_CONNS, "daemon: waked\n", 0, 0, 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                                         waking = 0;
2107                                         tcp_read( wake_sds[0], c, sizeof(c) );
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 }