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