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

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