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