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 1998-2006 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  16  * All rights reserved.
  17  *
  18  * Redistribution and use in source and binary forms are permitted
  19  * provided that this notice is preserved and that due credit is given
  20  * to the University of Michigan at Ann Arbor. The name of the University
  21  * may not be used to endorse or promote products derived from this
  22  * software without specific prior written permission. This software
  23  * is provided ``as is'' without express or implied warranty.
  24  */
  25
  26 #include "portable.h"
  27
  28 #include <stdio.h>
  29
  30 #include <ac/ctype.h>
  31 #include <ac/errno.h>
  32 #include <ac/socket.h>
  33 #include <ac/string.h>
  34 #include <ac/time.h>
  35 #include <ac/unistd.h>
  36
  37 #include "slap.h"
  38 #include "ldap_pvt_thread.h"
  39 #include "lutil.h"
  40
  41 #include "ldap_rq.h"
  42
  43 #if defined(HAVE_SYS_EPOLL_H) && defined(HAVE_EPOLL)
  44 # include <sys/epoll.h>
  45 #endif
  46
  47 #ifdef HAVE_TCPD
  48 # include <tcpd.h>
  49 int allow_severity = LOG_INFO;
  50 int deny_severity = LOG_NOTICE;
  51
  52 # define SLAP_STRING_UNKNOWN    STRING_UNKNOWN
  53 #else /* ! TCP Wrappers */
  54 # define SLAP_STRING_UNKNOWN    "unknown"
  55 #endif /* ! TCP Wrappers */
  56
  57 #ifdef LDAP_PF_LOCAL
  58 # include <sys/stat.h>
  59 /* this should go in <ldap.h> as soon as it is accepted */
  60 # define LDAPI_MOD_URLEXT               "x-mod"
  61 #endif /* LDAP_PF_LOCAL */
  62
  63 #ifdef LDAP_PF_INET6
  64 int slap_inet4or6 = AF_UNSPEC;
  65 #else
  66 int slap_inet4or6 = AF_INET;
  67 #endif
  68
  69 /* globals */
  70 time_t starttime;
  71 ber_socket_t dtblsize;
  72 slap_ssf_t local_ssf = LDAP_PVT_SASL_LOCAL_SSF;
  73 struct runqueue_s slapd_rq;
  74
  75 Listener **slap_listeners = NULL;
  76
  77 #ifndef SLAPD_LISTEN_BACKLOG
  78 #define SLAPD_LISTEN_BACKLOG 1024
  79 #endif
  80
  81 static ber_socket_t wake_sds[2];
  82 static int emfile;
  83
  84 static volatile int waking;
  85 #ifdef NO_THREADS
  86 #define WAKE_LISTENER(w)        do { \
  87         if ((w) && ++waking < 5) { \
  88                 tcp_write( wake_sds[1], "0", 1 ); \
  89         } \
  90 } while(0)
  91 #else
  92 #define WAKE_LISTENER(w)        do { \
  93         if (w) { \
  94                 tcp_write( wake_sds[1], "0", 1 ); \
  95         } \
  96 } while(0)
  97 #endif
  98
  99 volatile sig_atomic_t slapd_shutdown = 0;
 100 volatile sig_atomic_t slapd_gentle_shutdown = 0;
 101 volatile sig_atomic_t slapd_abrupt_shutdown = 0;
 102
 103 static struct slap_daemon {
 104         ldap_pvt_thread_mutex_t sd_mutex;
 105 #ifdef HAVE_TCPD
 106         ldap_pvt_thread_mutex_t tcpd_mutex;
 107 #endif
 108
 109         ber_socket_t sd_nactives;
 110         int sd_nwriters;
 111
 112 #ifdef HAVE_EPOLL
 113         struct epoll_event *sd_epolls;
 114         int     sd_nepolls;
 115         int     *sd_index;
 116         int     sd_epfd;
 117         int     sd_nfds;
 118 #else
 119 #ifndef HAVE_WINSOCK
 120         /* In winsock, accept() returns values higher than dtblsize
 121                 so don't bother with this optimization */
 122         int sd_nfds;
 123 #endif
 124         fd_set sd_actives;
 125         fd_set sd_readers;
 126         fd_set sd_writers;
 127 #endif
 128 } slap_daemon;
 129
 130 #ifdef HAVE_EPOLL
 131 # define SLAP_EVENTS_ARE_INDEXED        0
 132 # define SLAP_SOCK_IX(s)        (slap_daemon.sd_index[(s)])
 133 # define SLAP_SOCK_EP(s)        (slap_daemon.sd_epolls[SLAP_SOCK_IX(s)])
 134 # define SLAP_SOCK_EV(s)        (SLAP_SOCK_EP(s).events)
 135 # define SLAP_SOCK_IS_ACTIVE(s) (SLAP_SOCK_IX(s) != -1)
 136 # define SLAP_SOCK_NOT_ACTIVE(s)        (SLAP_SOCK_IX(s) == -1)
 137 # define SLAP_SOCK_IS_SET(s, mode)      (SLAP_SOCK_EV(s) & (mode))
 138
 139 # define SLAP_SOCK_IS_READ(s)   SLAP_SOCK_IS_SET((s), EPOLLIN)
 140 # define SLAP_SOCK_IS_WRITE(s)  SLAP_SOCK_IS_SET((s), EPOLLOUT)
 141
 142 # define SLAP_SET_SOCK(s, mode) do { \
 143         if ((SLAP_SOCK_EV(s) & (mode)) != (mode)) {     \
 144                 SLAP_SOCK_EV(s) |= (mode); \
 145                 epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_MOD, (s), \
 146                         &SLAP_SOCK_EP(s)); \
 147         } \
 148 } while(0)
 149
 150 # define SLAP_CLR_SOCK(s, mode) do { \
 151         if ((SLAP_SOCK_EV(s) & (mode))) { \
 152                 SLAP_SOCK_EV(s) &= ~(mode);     \
 153                 epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_MOD, s, \
 154                         &SLAP_SOCK_EP(s)); \
 155         } \
 156 } while(0)
 157
 158 # define SLAP_SOCK_SET_READ(s)  SLAP_SET_SOCK(s, EPOLLIN)
 159 # define SLAP_SOCK_SET_WRITE(s) SLAP_SET_SOCK(s, EPOLLOUT)
 160
 161 # ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 162 #  define SLAP_SOCK_SET_SUSPEND(s) \
 163         ( slap_daemon.sd_suspend[SLAP_SOCK_IX(s)] = 1 )
 164 #  define SLAP_SOCK_CLR_SUSPEND(s) \
 165         ( slap_daemon.sd_suspend[SLAP_SOCK_IX(s)] = 0 )
 166 #  define SLAP_SOCK_IS_SUSPEND(s) \
 167         ( slap_daemon.sd_suspend[SLAP_SOCK_IX(s)] == 1 )
 168 # endif
 169
 170 # define SLAP_SOCK_CLR_READ(s)  SLAP_CLR_SOCK((s), EPOLLIN)
 171 # define SLAP_SOCK_CLR_WRITE(s) SLAP_CLR_SOCK((s), EPOLLOUT)
 172
 173 # define SLAP_CLR_EVENT(i, mode)        (revents[(i)].events &= ~(mode))
 174
 175 # define SLAP_EVENT_MAX slap_daemon.sd_nfds
 176
 177 /* If a Listener address is provided, store that as the epoll data.
 178  * Otherwise, store the address of this socket's slot in the
 179  * index array. If we can't do this add, the system is out of
 180  * resources and we need to shutdown.
 181  */
 182 # define SLAP_ADD_SOCK(s, l) do { \
 183         int rc; \
 184         SLAP_SOCK_IX((s)) = slap_daemon.sd_nfds; \
 185         SLAP_SOCK_EP((s)).data.ptr = (l) ? (l) : (void *)(&SLAP_SOCK_IX(s)); \
 186         SLAP_SOCK_EV((s)) = EPOLLIN; \
 187         rc = epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_ADD, \
 188                 (s), &SLAP_SOCK_EP((s))); \
 189         if ( rc == 0 ) { \
 190                 slap_daemon.sd_nfds++; \
 191         } else { \
 192                 Debug( LDAP_DEBUG_ANY, \
 193                         "daemon: epoll_ctl(ADD,fd=%d) failed, errno=%d, shutting down\n", \
 194                         s, errno, 0 ); \
 195                 slapd_shutdown = 2; \
 196         } \
 197 } while (0)
 198
 199 # define SLAP_EV_LISTENER(ptr) (((int *)(ptr) >= slap_daemon.sd_index && \
 200         (int *)(ptr) <= (slap_daemon.sd_index+dtblsize)) ? 0 : 1 )
 201
 202 # define SLAP_EV_PTRFD(ptr) (SLAP_EV_LISTENER(ptr) ? \
 203         ((Listener *)ptr)->sl_sd : (int *)(ptr) - slap_daemon.sd_index)
 204
 205 # define SLAP_DEL_SOCK(s) do { \
 206         int fd, rc, index = SLAP_SOCK_IX((s)); \
 207         if ( index < 0 ) break; \
 208         rc = epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_DEL, \
 209                 (s), &SLAP_SOCK_EP((s))); \
 210         slap_daemon.sd_epolls[index] = \
 211                 slap_daemon.sd_epolls[slap_daemon.sd_nfds-1]; \
 212         fd = SLAP_EV_PTRFD(slap_daemon.sd_epolls[index].data.ptr); \
 213         slap_daemon.sd_index[fd] = index; \
 214         slap_daemon.sd_index[(s)] = -1; \
 215         slap_daemon.sd_nfds--; \
 216 } while (0)
 217
 218 # define SLAP_EVENT_CLR_READ(i) SLAP_CLR_EVENT((i), EPOLLIN)
 219 # define SLAP_EVENT_CLR_WRITE(i)        SLAP_CLR_EVENT((i), EPOLLOUT)
 220
 221 # define SLAP_CHK_EVENT(i, mode)        (revents[(i)].events & mode)
 222
 223 # define SLAP_EVENT_IS_READ(i)  SLAP_CHK_EVENT((i), EPOLLIN)
 224 # define SLAP_EVENT_IS_WRITE(i) SLAP_CHK_EVENT((i), EPOLLOUT)
 225 # define SLAP_EVENT_IS_LISTENER(i)      SLAP_EV_LISTENER(revents[(i)].data.ptr)
 226 # define SLAP_EVENT_LISTENER(i) ((Listener *)(revents[(i)].data.ptr))
 227
 228 # define SLAP_EVENT_FD(i)       SLAP_EV_PTRFD(revents[(i)].data.ptr)
 229
 230 # define SLAP_SOCK_SET_INIT do { \
 231         slap_daemon.sd_epolls = ch_calloc(1, \
 232                 sizeof(struct epoll_event) * dtblsize * 2); \
 233         slap_daemon.sd_index = ch_malloc(sizeof(int) * dtblsize); \
 234         slap_daemon.sd_epfd = epoll_create( dtblsize ); \
 235         for (i=0; i<dtblsize; i++) slap_daemon.sd_index[i] = -1; \
 236 } while (0)
 237
 238 # define SLAP_EVENT_DECL struct epoll_event *revents
 239
 240 # define SLAP_EVENT_INIT do { \
 241         revents = slap_daemon.sd_epolls + dtblsize; \
 242 } while (0)
 243
 244 # define SLAP_EVENT_WAIT(tvp) \
 245         epoll_wait( slap_daemon.sd_epfd, revents, \
 246                 dtblsize, (tvp) ? (tvp)->tv_sec * 1000 : -1 )
 247
 248 #else
 249 /* select */
 250
 251 # define SLAP_EVENTS_ARE_INDEXED 1
 252 # define SLAP_EVENT_DECL        \
 253         fd_set readfds, writefds
 254
 255 # define SLAP_EVENT_INIT do { \
 256         AC_MEMCPY( &readfds, &slap_daemon.sd_readers, sizeof(fd_set) ); \
 257         if ( nwriters ) { \
 258                 AC_MEMCPY( &writefds, &slap_daemon.sd_writers, sizeof(fd_set) ); \
 259         } else { \
 260                 FD_ZERO( &writefds ); \
 261         } \
 262 } while (0)
 263
 264 # ifdef FD_SETSIZE
 265 #  define       CHK_SETSIZE do { \
 266         if (dtblsize > FD_SETSIZE) dtblsize = FD_SETSIZE; \
 267 } while (0)
 268 # else
 269 #  define        CHK_SETSIZE do { ; } while (0)
 270 # endif
 271
 272 # define        SLAP_SOCK_SET_INIT do { \
 273         CHK_SETSIZE; \
 274         FD_ZERO(&slap_daemon.sd_readers); \
 275         FD_ZERO(&slap_daemon.sd_writers); \
 276 } while (0)
 277
 278 # define SLAP_SOCK_IS_ACTIVE(fd)        FD_ISSET((fd), &slap_daemon.sd_actives)
 279 # define SLAP_SOCK_IS_READ(fd)          FD_ISSET((fd), &slap_daemon.sd_readers)
 280 # define SLAP_SOCK_IS_WRITE(fd)         FD_ISSET((fd), &slap_daemon.sd_writers)
 281
 282 # define SLAP_SOCK_NOT_ACTIVE(fd)       (!SLAP_SOCK_IS_ACTIVE(fd) && \
 283          !SLAP_SOCK_IS_READ(fd) && !SLAP_SOCK_IS_WRITE(fd))
 284
 285 # ifdef HAVE_WINSOCK
 286 #  define SLAP_SOCK_SET_READ(fd)        do { \
 287         if (!SLAP_SOCK_IS_READ(fd)) { FD_SET((fd), &slap_daemon.sd_readers); } \
 288 } while(0)
 289 #  define SLAP_SOCK_SET_WRITE(fd)       do { \
 290         if (!SLAP_SOCK_IS_WRITE(fd)) { FD_SET((fd), &slap_daemon.sd_writers); } \
 291 } while(0)
 292
 293 #  define SLAP_ADDTEST(s)
 294 #  define SLAP_EVENT_MAX        dtblsize
 295 # else
 296 #  define SLAP_SOCK_SET_READ(fd)        FD_SET((fd), &slap_daemon.sd_readers)
 297 #  define SLAP_SOCK_SET_WRITE(fd)       FD_SET((fd), &slap_daemon.sd_writers)
 298
 299 #  define SLAP_EVENT_MAX        slap_daemon.sd_nfds
 300 #  define SLAP_ADDTEST(s)       do { \
 301         if ((s) >= slap_daemon.sd_nfds) slap_daemon.sd_nfds = (s)+1; \
 302 } while (0)
 303 # endif
 304
 305 # define SLAP_SOCK_CLR_READ(fd)         FD_CLR((fd), &slap_daemon.sd_readers)
 306 # define SLAP_SOCK_CLR_WRITE(fd)        FD_CLR((fd), &slap_daemon.sd_writers)
 307
 308 # define SLAP_ADD_SOCK(s, l) do { \
 309         SLAP_ADDTEST((s)); \
 310         FD_SET((s), &slap_daemon.sd_actives); \
 311         FD_SET((s), &slap_daemon.sd_readers); \
 312 } while(0)
 313
 314 # define SLAP_DEL_SOCK(s) do { \
 315         FD_CLR((s), &slap_daemon.sd_actives); \
 316         FD_CLR((s), &slap_daemon.sd_readers); \
 317         FD_CLR((s), &slap_daemon.sd_writers); \
 318 } while(0)
 319
 320 # define SLAP_EVENT_IS_READ(fd)         FD_ISSET((fd), &readfds)
 321 # define SLAP_EVENT_IS_WRITE(fd)        FD_ISSET((fd), &writefds)
 322
 323 # define SLAP_EVENT_CLR_READ(fd)        FD_CLR((fd), &readfds)
 324 # define SLAP_EVENT_CLR_WRITE(fd)       FD_CLR((fd), &writefds)
 325
 326 # define SLAP_EVENT_WAIT(tvp) \
 327         select( SLAP_EVENT_MAX, &readfds, \
 328                 nwriters > 0 ? &writefds : NULL, NULL, (tvp) )
 329 #endif
 330
 331 #ifdef HAVE_SLP
 332 /*
 333  * SLP related functions
 334  */
 335 #include <slp.h>
 336
 337 #define LDAP_SRVTYPE_PREFIX "service:ldap://"
 338 #define LDAPS_SRVTYPE_PREFIX "service:ldaps://"
 339 static char** slapd_srvurls = NULL;
 340 static SLPHandle slapd_hslp = 0;
 341 int slapd_register_slp = 0;
 342 char *slapd_slp_attrs = NULL;
 343
 344 static SLPError slapd_slp_cookie;
 345
 346 void slapd_slp_init( const char* urls ) {
 347         int i;
 348         SLPError err;
 349
 350         slapd_srvurls = ldap_str2charray( urls, " " );
 351
 352         if( slapd_srvurls == NULL ) return;
 353
 354         /* find and expand INADDR_ANY URLs */
 355         for( i=0; slapd_srvurls[i] != NULL; i++ ) {
 356                 if( strcmp( slapd_srvurls[i], "ldap:///" ) == 0) {
 357                         char *host = ldap_pvt_get_fqdn( NULL );
 358                         if ( host != NULL ) {
 359                                 slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i],
 360                                         strlen( host ) +
 361                                         sizeof( LDAP_SRVTYPE_PREFIX ) );
 362                                 strcpy( lutil_strcopy(slapd_srvurls[i],
 363                                         LDAP_SRVTYPE_PREFIX ), host );
 364
 365                                 ch_free( host );
 366                         }
 367
 368                 } else if ( strcmp( slapd_srvurls[i], "ldaps:///" ) == 0) {
 369                         char *host = ldap_pvt_get_fqdn( NULL );
 370                         if ( host != NULL ) {
 371                                 slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i],
 372                                         strlen( host ) +
 373                                         sizeof( LDAPS_SRVTYPE_PREFIX ) );
 374                                 strcpy( lutil_strcopy(slapd_srvurls[i],
 375                                         LDAPS_SRVTYPE_PREFIX ), host );
 376
 377                                 ch_free( host );
 378                         }
 379                 }
 380         }
 381
 382         /* open the SLP handle */
 383         err = SLPOpen( "en", 0, &slapd_hslp );
 384
 385         if (err != SLP_OK) {
 386                 Debug( LDAP_DEBUG_CONNS, "daemon: SLPOpen() failed with %ld\n",
 387                         (long)err, 0, 0 );
 388         }
 389 }
 390
 391 void slapd_slp_deinit() {
 392         if( slapd_srvurls == NULL ) return;
 393
 394         ldap_charray_free( slapd_srvurls );
 395         slapd_srvurls = NULL;
 396
 397         /* close the SLP handle */
 398         SLPClose( slapd_hslp );
 399 }
 400
 401 void slapd_slp_regreport(
 402         SLPHandle hslp,
 403         SLPError errcode,
 404         void* cookie )
 405 {
 406         /* return the error code in the cookie */
 407         *(SLPError*)cookie = errcode;
 408 }
 409
 410 void slapd_slp_reg() {
 411         int i;
 412         SLPError err;
 413
 414         if( slapd_srvurls == NULL ) return;
 415
 416         for( i=0; slapd_srvurls[i] != NULL; i++ ) {
 417                 if( strncmp( slapd_srvurls[i], LDAP_SRVTYPE_PREFIX,
 418                                 sizeof( LDAP_SRVTYPE_PREFIX ) - 1 ) == 0 ||
 419                     strncmp( slapd_srvurls[i], LDAPS_SRVTYPE_PREFIX,
 420                                 sizeof( LDAPS_SRVTYPE_PREFIX ) - 1 ) == 0 )
 421                 {
 422                         err = SLPReg( slapd_hslp,
 423                                 slapd_srvurls[i],
 424                                 SLP_LIFETIME_MAXIMUM,
 425                                 "ldap",
 426                                         (slapd_slp_attrs) ? slapd_slp_attrs : "",
 427                                         SLP_TRUE,
 428                                 slapd_slp_regreport,
 429                                         &slapd_slp_cookie );
 430
 431                         if (err != SLP_OK || slapd_slp_cookie != SLP_OK) {
 432                                 Debug( LDAP_DEBUG_CONNS,
 433                                         "daemon: SLPReg(%s) failed with %ld, cookie = %ld\n",
 434                                         slapd_srvurls[i], (long)err, (long)slapd_slp_cookie );
 435                         }
 436                 }
 437         }
 438 }
 439
 440 void slapd_slp_dereg() {
 441         int i;
 442         SLPError err;
 443
 444         if( slapd_srvurls == NULL ) return;
 445
 446         for( i=0; slapd_srvurls[i] != NULL; i++ ) {
 447                 err = SLPDereg( slapd_hslp,
 448                         slapd_srvurls[i],
 449                         slapd_slp_regreport,
 450                                 &slapd_slp_cookie );
 451
 452                 if (err != SLP_OK || slapd_slp_cookie != SLP_OK) {
 453                         Debug( LDAP_DEBUG_CONNS,
 454                                 "daemon: SLPDereg(%s) failed with %ld, cookie = %ld\n",
 455                                 slapd_srvurls[i], (long)err, (long)slapd_slp_cookie );
 456                 }
 457         }
 458 }
 459 #endif /* HAVE_SLP */
 460
 461 /*
 462  * Add a descriptor to daemon control
 463  *
 464  * If isactive, the descriptor is a live server session and is subject
 465  * to idletimeout control. Otherwise, the descriptor is a passive
 466  * listener or an outbound client session, and not subject to
 467  * idletimeout. The underlying event handler may record the Listener
 468  * argument to differentiate Listener's from real sessions.
 469  */
 470 static void slapd_add(ber_socket_t s, int isactive, Listener *sl) {
 471         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 472
 473         assert( SLAP_SOCK_NOT_ACTIVE(s) );
 474
 475         if ( isactive ) slap_daemon.sd_nactives++;
 476
 477         SLAP_ADD_SOCK(s, sl);
 478
 479         Debug( LDAP_DEBUG_CONNS, "daemon: added %ldr\n",
 480                 (long) s, 0, 0 );
 481
 482         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 483
 484 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 485         WAKE_LISTENER(1);
 486 #endif
 487 }
 488
 489 void slapd_sd_lock()
 490 {
 491         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 492 }
 493
 494 void slapd_sd_unlock()
 495 {
 496         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 497 }
 498
 499 /*
 500  * Remove the descriptor from daemon control
 501  */
 502 void slapd_remove(
 503         ber_socket_t s,
 504         int wasactive,
 505         int wake,
 506         int locked )
 507 {
 508         int waswriter;
 509         int wasreader;
 510
 511         if ( !locked )
 512                 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 513
 514         assert( SLAP_SOCK_IS_ACTIVE( s ));
 515
 516         if ( wasactive ) slap_daemon.sd_nactives--;
 517
 518         waswriter = SLAP_SOCK_IS_WRITE(s);
 519         wasreader = SLAP_SOCK_IS_READ(s);
 520
 521         Debug( LDAP_DEBUG_CONNS, "daemon: removing %ld%s%s\n",
 522                 (long) s,
 523                 wasreader ? "r" : "",
 524                 waswriter ? "w" : "" );
 525
 526         if ( waswriter ) slap_daemon.sd_nwriters--;
 527
 528         SLAP_DEL_SOCK(s);
 529
 530         /* If we ran out of file descriptors, we dropped a listener from
 531          * the select() loop. Now that we're removing a session from our
 532          * control, we can try to resume a dropped listener to use.
 533          */
 534         if ( emfile ) {
 535                 int i;
 536                 for ( i = 0; slap_listeners[i] != NULL; i++ ) {
 537                         Listener *lr = slap_listeners[i];
 538
 539                         if ( lr->sl_sd == AC_SOCKET_INVALID ) continue;
 540                         if ( lr->sl_sd == s ) continue;
 541                         if ( lr->sl_mute ) {
 542                                 lr->sl_mute = 0;
 543                                 emfile--;
 544                                 break;
 545                         }
 546                 }
 547                 /* Walked the entire list without enabling anything; emfile
 548                  * counter is stale. Reset it.
 549                  */
 550                 if ( slap_listeners[i] == NULL ) emfile = 0;
 551         }
 552         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 553         WAKE_LISTENER(wake || slapd_gentle_shutdown == 2);
 554 }
 555
 556 void slapd_clr_write(ber_socket_t s, int wake) {
 557         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 558
 559         assert( SLAP_SOCK_IS_ACTIVE( s ));
 560
 561         if ( SLAP_SOCK_IS_WRITE( s )) {
 562                 SLAP_SOCK_CLR_WRITE( s );
 563                 slap_daemon.sd_nwriters--;
 564         }
 565
 566         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 567         WAKE_LISTENER(wake);
 568 }
 569
 570 void slapd_set_write(ber_socket_t s, int wake) {
 571         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 572
 573         assert( SLAP_SOCK_IS_ACTIVE( s ));
 574
 575         if ( !SLAP_SOCK_IS_WRITE( s )) {
 576                 SLAP_SOCK_SET_WRITE( s );
 577                 slap_daemon.sd_nwriters++;
 578         }
 579
 580         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 581         WAKE_LISTENER(wake);
 582 }
 583
 584 int slapd_clr_read(ber_socket_t s, int wake) {
 585         int rc = 1;
 586         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 587
 588         if ( SLAP_SOCK_IS_ACTIVE( s )) {
 589                 SLAP_SOCK_CLR_READ( s );
 590                 rc = 0;
 591         }
 592         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 593         if ( !rc )
 594                 WAKE_LISTENER(wake);
 595         return rc;
 596 }
 597
 598 void slapd_set_read(ber_socket_t s, int wake) {
 599         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 600
 601         assert( SLAP_SOCK_IS_ACTIVE( s ));
 602         if (!SLAP_SOCK_IS_READ( s )) SLAP_SOCK_SET_READ( s );
 603
 604         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 605         WAKE_LISTENER(wake);
 606 }
 607
 608 static void slapd_close(ber_socket_t s) {
 609         Debug( LDAP_DEBUG_CONNS, "daemon: closing %ld\n",
 610                 (long) s, 0, 0 );
 611         tcp_close(s);
 612 }
 613
 614 static void slap_free_listener_addresses(struct sockaddr **sal) {
 615         struct sockaddr **sap;
 616         if (sal == NULL) return;
 617         for (sap = sal; *sap != NULL; sap++) ch_free(*sap);
 618         ch_free(sal);
 619 }
 620
 621 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
 622 static int get_url_perms(
 623         char    **exts,
 624         mode_t  *perms,
 625         int     *crit )
 626 {
 627         int     i;
 628
 629         assert( exts != NULL );
 630         assert( perms != NULL );
 631         assert( crit != NULL );
 632
 633         *crit = 0;
 634         for ( i = 0; exts[ i ]; i++ ) {
 635                 char    *type = exts[ i ];
 636                 int     c = 0;
 637
 638                 if ( type[ 0 ] == '!' ) {
 639                         c = 1;
 640                         type++;
 641                 }
 642
 643                 if ( strncasecmp( type, LDAPI_MOD_URLEXT "=",
 644                         sizeof(LDAPI_MOD_URLEXT "=") - 1 ) == 0 )
 645                 {
 646                         char *value = type + ( sizeof(LDAPI_MOD_URLEXT "=") - 1 );
 647                         mode_t p = 0;
 648                         int j;
 649
 650                         switch (strlen(value)) {
 651                         case 4:
 652                                 /* skip leading '0' */
 653                                 if ( value[ 0 ] != '0' ) return LDAP_OTHER;
 654                                 value++;
 655
 656                         case 3:
 657                                 for ( j = 0; j < 3; j++) {
 658                                         int     v;
 659
 660                                         v = value[ j ] - '0';
 661
 662                                         if ( v < 0 || v > 7 ) return LDAP_OTHER;
 663
 664                                         p |= v << 3*(2-j);
 665                                 }
 666                                 break;
 667
 668                         case 10:
 669                                 for ( j = 1; j < 10; j++ ) {
 670                                         static mode_t   m[] = { 0,
 671                                                 S_IRUSR, S_IWUSR, S_IXUSR,
 672                                                 S_IRGRP, S_IWGRP, S_IXGRP,
 673                                                 S_IROTH, S_IWOTH, S_IXOTH
 674                                         };
 675                                         static char     c[] = "-rwxrwxrwx";
 676
 677                                         if ( value[ j ] == c[ j ] ) {
 678                                                 p |= m[ j ];
 679
 680                                         } else if ( value[ j ] != '-' ) {
 681                                                 return LDAP_OTHER;
 682                                         }
 683                                 }
 684                                 break;
 685
 686                         default:
 687                                 return LDAP_OTHER;
 688                         }
 689
 690                         *crit = c;
 691                         *perms = p;
 692
 693                         return LDAP_SUCCESS;
 694                 }
 695         }
 696
 697         return LDAP_OTHER;
 698 }
 699 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
 700
 701 /* port = 0 indicates AF_LOCAL */
 702 static int slap_get_listener_addresses(
 703         const char *host,
 704         unsigned short port,
 705         struct sockaddr ***sal)
 706 {
 707         struct sockaddr **sap;
 708
 709 #ifdef LDAP_PF_LOCAL
 710         if ( port == 0 ) {
 711                 *sal = ch_malloc(2 * sizeof(void *));
 712                 if (*sal == NULL) return -1;
 713
 714                 sap = *sal;
 715                 *sap = ch_malloc(sizeof(struct sockaddr_un));
 716                 if (*sap == NULL) goto errexit;
 717                 sap[1] = NULL;
 718
 719                 if ( strlen(host) >
 720                         (sizeof(((struct sockaddr_un *)*sap)->sun_path) - 1) )
 721                 {
 722                         Debug( LDAP_DEBUG_ANY,
 723                                 "daemon: domain socket path (%s) too long in URL",
 724                                 host, 0, 0);
 725                         goto errexit;
 726                 }
 727
 728                 (void)memset( (void *)*sap, '\0', sizeof(struct sockaddr_un) );
 729                 (*sap)->sa_family = AF_LOCAL;
 730                 strcpy( ((struct sockaddr_un *)*sap)->sun_path, host );
 731         } else
 732 #endif
 733         {
 734 #ifdef HAVE_GETADDRINFO
 735                 struct addrinfo hints, *res, *sai;
 736                 int n, err;
 737                 char serv[7];
 738
 739                 memset( &hints, '\0', sizeof(hints) );
 740                 hints.ai_flags = AI_PASSIVE;
 741                 hints.ai_socktype = SOCK_STREAM;
 742                 hints.ai_family = slap_inet4or6;
 743                 snprintf(serv, sizeof serv, "%d", port);
 744
 745                 if ( (err = getaddrinfo(host, serv, &hints, &res)) ) {
 746                         Debug( LDAP_DEBUG_ANY, "daemon: getaddrinfo() failed: %s\n",
 747                                 AC_GAI_STRERROR(err), 0, 0);
 748                         return -1;
 749                 }
 750
 751                 sai = res;
 752                 for (n=2; (sai = sai->ai_next) != NULL; n++) {
 753                         /* EMPTY */ ;
 754                 }
 755                 *sal = ch_calloc(n, sizeof(void *));
 756                 if (*sal == NULL) return -1;
 757
 758                 sap = *sal;
 759                 *sap = NULL;
 760
 761                 for ( sai=res; sai; sai=sai->ai_next ) {
 762                         if( sai->ai_addr == NULL ) {
 763                                 Debug( LDAP_DEBUG_ANY, "slap_get_listener_addresses: "
 764                                         "getaddrinfo ai_addr is NULL?\n", 0, 0, 0 );
 765                                 freeaddrinfo(res);
 766                                 goto errexit;
 767                         }
 768
 769                         switch (sai->ai_family) {
 770 #  ifdef LDAP_PF_INET6
 771                         case AF_INET6:
 772                                 *sap = ch_malloc(sizeof(struct sockaddr_in6));
 773                                 if (*sap == NULL) {
 774                                         freeaddrinfo(res);
 775                                         goto errexit;
 776                                 }
 777                                 *(struct sockaddr_in6 *)*sap =
 778                                         *((struct sockaddr_in6 *)sai->ai_addr);
 779                                 break;
 780 #  endif
 781                         case AF_INET:
 782                                 *sap = ch_malloc(sizeof(struct sockaddr_in));
 783                                 if (*sap == NULL) {
 784                                         freeaddrinfo(res);
 785                                         goto errexit;
 786                                 }
 787                                 *(struct sockaddr_in *)*sap =
 788                                         *((struct sockaddr_in *)sai->ai_addr);
 789                                 break;
 790                         default:
 791                                 *sap = NULL;
 792                                 break;
 793                         }
 794
 795                         if (*sap != NULL) {
 796                                 (*sap)->sa_family = sai->ai_family;
 797                                 sap++;
 798                                 *sap = NULL;
 799                         }
 800                 }
 801
 802                 freeaddrinfo(res);
 803
 804 #else
 805                 int i, n = 1;
 806                 struct in_addr in;
 807                 struct hostent *he = NULL;
 808
 809                 if ( host == NULL ) {
 810                         in.s_addr = htonl(INADDR_ANY);
 811
 812                 } else if ( !inet_aton( host, &in ) ) {
 813                         he = gethostbyname( host );
 814                         if( he == NULL ) {
 815                                 Debug( LDAP_DEBUG_ANY,
 816                                         "daemon: invalid host %s", host, 0, 0);
 817                                 return -1;
 818                         }
 819                         for (n = 0; he->h_addr_list[n]; n++) /* empty */;
 820                 }
 821
 822                 *sal = ch_malloc((n+1) * sizeof(void *));
 823                 if (*sal == NULL) return -1;
 824
 825                 sap = *sal;
 826                 for ( i = 0; i<n; i++ ) {
 827                         sap[i] = ch_malloc(sizeof(struct sockaddr_in));
 828                         if (*sap == NULL) goto errexit;
 829
 830                         (void)memset( (void *)sap[i], '\0', sizeof(struct sockaddr_in) );
 831                         sap[i]->sa_family = AF_INET;
 832                         ((struct sockaddr_in *)sap[i])->sin_port = htons(port);
 833                         AC_MEMCPY( &((struct sockaddr_in *)sap[i])->sin_addr,
 834                                 he ? he->h_addr_list[i] : &in, sizeof(struct in_addr) );
 835                 }
 836                 sap[i] = NULL;
 837 #endif
 838         }
 839
 840         return 0;
 841
 842 errexit:
 843         slap_free_listener_addresses(*sal);
 844         return -1;
 845 }
 846
 847 static int slap_open_listener(
 848         const char* url,
 849         int *listeners,
 850         int *cur
 851         )
 852 {
 853         int     num, tmp, rc;
 854         Listener l;
 855         Listener *li;
 856         LDAPURLDesc *lud;
 857         unsigned short port;
 858         int err, addrlen = 0;
 859         struct sockaddr **sal, **psal;
 860         int socktype = SOCK_STREAM;     /* default to COTS */
 861
 862 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
 863         /*
 864          * use safe defaults
 865          */
 866         int     crit = 1;
 867 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
 868
 869         rc = ldap_url_parse( url, &lud );
 870
 871         if( rc != LDAP_URL_SUCCESS ) {
 872                 Debug( LDAP_DEBUG_ANY,
 873                         "daemon: listen URL \"%s\" parse error=%d\n",
 874                         url, rc, 0 );
 875                 return rc;
 876         }
 877
 878         l.sl_url.bv_val = NULL;
 879         l.sl_mute = 0;
 880 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 881         l.sl_busy = 0;
 882 #endif
 883
 884 #ifndef HAVE_TLS
 885         if( ldap_pvt_url_scheme2tls( lud->lud_scheme ) ) {
 886                 Debug( LDAP_DEBUG_ANY, "daemon: TLS not supported (%s)\n",
 887                         url, 0, 0 );
 888                 ldap_free_urldesc( lud );
 889                 return -1;
 890         }
 891
 892         if(! lud->lud_port ) lud->lud_port = LDAP_PORT;
 893
 894 #else
 895         l.sl_is_tls = ldap_pvt_url_scheme2tls( lud->lud_scheme );
 896
 897         if(! lud->lud_port ) {
 898                 lud->lud_port = l.sl_is_tls ? LDAPS_PORT : LDAP_PORT;
 899         }
 900 #endif
 901
 902         port = (unsigned short) lud->lud_port;
 903
 904         tmp = ldap_pvt_url_scheme2proto(lud->lud_scheme);
 905         if ( tmp == LDAP_PROTO_IPC ) {
 906 #ifdef LDAP_PF_LOCAL
 907                 if ( lud->lud_host == NULL || lud->lud_host[0] == '\0' ) {
 908                         err = slap_get_listener_addresses(LDAPI_SOCK, 0, &sal);
 909                 } else {
 910                         err = slap_get_listener_addresses(lud->lud_host, 0, &sal);
 911                 }
 912 #else
 913
 914                 Debug( LDAP_DEBUG_ANY, "daemon: URL scheme not supported: %s",
 915                         url, 0, 0);
 916                 ldap_free_urldesc( lud );
 917                 return -1;
 918 #endif
 919         } else {
 920                 if( lud->lud_host == NULL || lud->lud_host[0] == '\0'
 921                         || strcmp(lud->lud_host, "*") == 0 )
 922                 {
 923                         err = slap_get_listener_addresses(NULL, port, &sal);
 924                 } else {
 925                         err = slap_get_listener_addresses(lud->lud_host, port, &sal);
 926                 }
 927         }
 928
 929 #ifdef LDAP_CONNECTIONLESS
 930         l.sl_is_udp = ( tmp == LDAP_PROTO_UDP );
 931 #endif
 932
 933 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
 934         if ( lud->lud_exts ) {
 935                 err = get_url_perms( lud->lud_exts, &l.sl_perms, &crit );
 936         } else {
 937                 l.sl_perms = S_IRWXU | S_IRWXO;
 938         }
 939 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
 940
 941         ldap_free_urldesc( lud );
 942         if ( err ) return -1;
 943
 944         /* If we got more than one address returned, we need to make space
 945          * for it in the slap_listeners array.
 946          */
 947         for ( num=0; sal[num]; num++ ) /* empty */;
 948         if ( num > 1 ) {
 949                 *listeners += num-1;
 950                 slap_listeners = ch_realloc( slap_listeners,
 951                         (*listeners + 1) * sizeof(Listener *) );
 952         }
 953
 954         psal = sal;
 955         while ( *sal != NULL ) {
 956                 char *af;
 957                 switch( (*sal)->sa_family ) {
 958                 case AF_INET:
 959                         af = "IPv4";
 960                         break;
 961 #ifdef LDAP_PF_INET6
 962                 case AF_INET6:
 963                         af = "IPv6";
 964                         break;
 965 #endif
 966 #ifdef LDAP_PF_LOCAL
 967                 case AF_LOCAL:
 968                         af = "Local";
 969                         break;
 970 #endif
 971                 default:
 972                         sal++;
 973                         continue;
 974                 }
 975
 976 #ifdef LDAP_CONNECTIONLESS
 977                 if( l.sl_is_udp ) socktype = SOCK_DGRAM;
 978 #endif
 979
 980                 l.sl_sd = socket( (*sal)->sa_family, socktype, 0);
 981                 if ( l.sl_sd == AC_SOCKET_INVALID ) {
 982                         int err = sock_errno();
 983                         Debug( LDAP_DEBUG_ANY,
 984                                 "daemon: %s socket() failed errno=%d (%s)\n",
 985                                 af, err, sock_errstr(err) );
 986                         sal++;
 987                         continue;
 988                 }
 989
 990 #ifndef HAVE_WINSOCK
 991                 if ( l.sl_sd >= dtblsize ) {
 992                         Debug( LDAP_DEBUG_ANY,
 993                                 "daemon: listener descriptor %ld is too great %ld\n",
 994                                 (long) l.sl_sd, (long) dtblsize, 0 );
 995                         tcp_close( l.sl_sd );
 996                         sal++;
 997                         continue;
 998                 }
 999 #endif
1000
1001 #ifdef LDAP_PF_LOCAL
1002                 if ( (*sal)->sa_family == AF_LOCAL ) {
1003                         unlink( ((struct sockaddr_un *)*sal)->sun_path );
1004                 } else
1005 #endif
1006                 {
1007 #ifdef SO_REUSEADDR
1008                         /* enable address reuse */
1009                         tmp = 1;
1010                         rc = setsockopt( l.sl_sd, SOL_SOCKET, SO_REUSEADDR,
1011                                 (char *) &tmp, sizeof(tmp) );
1012                         if ( rc == AC_SOCKET_ERROR ) {
1013                                 int err = sock_errno();
1014                                 Debug( LDAP_DEBUG_ANY, "slapd(%ld): "
1015                                         "setsockopt(SO_REUSEADDR) failed errno=%d (%s)\n",
1016                                         (long) l.sl_sd, err, sock_errstr(err) );
1017                         }
1018 #endif
1019                 }
1020
1021                 switch( (*sal)->sa_family ) {
1022                 case AF_INET:
1023                         addrlen = sizeof(struct sockaddr_in);
1024                         break;
1025 #ifdef LDAP_PF_INET6
1026                 case AF_INET6:
1027 #ifdef IPV6_V6ONLY
1028                         /* Try to use IPv6 sockets for IPv6 only */
1029                         tmp = 1;
1030                         rc = setsockopt( l.sl_sd, IPPROTO_IPV6, IPV6_V6ONLY,
1031                                 (char *) &tmp, sizeof(tmp) );
1032                         if ( rc == AC_SOCKET_ERROR ) {
1033                                 int err = sock_errno();
1034                                 Debug( LDAP_DEBUG_ANY, "slapd(%ld): "
1035                                         "setsockopt(IPV6_V6ONLY) failed errno=%d (%s)\n",
1036                                         (long) l.sl_sd, err, sock_errstr(err) );
1037                         }
1038 #endif
1039                         addrlen = sizeof(struct sockaddr_in6);
1040                         break;
1041 #endif
1042
1043 #ifdef LDAP_PF_LOCAL
1044                 case AF_LOCAL:
1045 #ifdef LOCAL_CREDS
1046                 {
1047                         int one = 1;
1048                         setsockopt(l.sl_sd, 0, LOCAL_CREDS, &one, sizeof one);
1049                 }
1050 #endif
1051                 addrlen = sizeof(struct sockaddr_un);
1052                 break;
1053 #endif
1054                 }
1055
1056                 if (bind(l.sl_sd, *sal, addrlen)) {
1057                         err = sock_errno();
1058                         Debug( LDAP_DEBUG_ANY,
1059                                 "daemon: bind(%ld) failed errno=%d (%s)\n",
1060                                 (long) l.sl_sd, err, sock_errstr(err) );
1061                         tcp_close( l.sl_sd );
1062                         sal++;
1063                         continue;
1064                 }
1065
1066                 switch ( (*sal)->sa_family ) {
1067 #ifdef LDAP_PF_LOCAL
1068                 case AF_LOCAL: {
1069                         char *addr = ((struct sockaddr_un *)*sal)->sun_path;
1070                         l.sl_name.bv_len = strlen(addr) + sizeof("PATH=") - 1;
1071                         l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len + 1 );
1072                         snprintf( l.sl_name.bv_val, l.sl_name.bv_len + 1,
1073                                 "PATH=%s", addr );
1074                 } break;
1075 #endif /* LDAP_PF_LOCAL */
1076
1077                 case AF_INET: {
1078                         char *s;
1079 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
1080                         char addr[INET_ADDRSTRLEN];
1081                         inet_ntop( AF_INET, &((struct sockaddr_in *)*sal)->sin_addr,
1082                                 addr, sizeof(addr) );
1083                         s = addr;
1084 #else
1085                         s = inet_ntoa( ((struct sockaddr_in *) *sal)->sin_addr );
1086 #endif
1087                         port = ntohs( ((struct sockaddr_in *)*sal) ->sin_port );
1088                         l.sl_name.bv_val =
1089                                 ber_memalloc( sizeof("IP=255.255.255.255:65535") );
1090                         snprintf( l.sl_name.bv_val, sizeof("IP=255.255.255.255:65535"),
1091                                 "IP=%s:%d",
1092                                  s != NULL ? s : SLAP_STRING_UNKNOWN, port );
1093                         l.sl_name.bv_len = strlen( l.sl_name.bv_val );
1094                 } break;
1095
1096 #ifdef LDAP_PF_INET6
1097                 case AF_INET6: {
1098                         char addr[INET6_ADDRSTRLEN];
1099                         inet_ntop( AF_INET6, &((struct sockaddr_in6 *)*sal)->sin6_addr,
1100                                 addr, sizeof addr);
1101                         port = ntohs( ((struct sockaddr_in6 *)*sal)->sin6_port );
1102                         l.sl_name.bv_len = strlen(addr) + sizeof("IP= 65535");
1103                         l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len );
1104                         snprintf( l.sl_name.bv_val, l.sl_name.bv_len, "IP=%s %d",
1105                                 addr, port );
1106                         l.sl_name.bv_len = strlen( l.sl_name.bv_val );
1107                 } break;
1108 #endif /* LDAP_PF_INET6 */
1109
1110                 default:
1111                         Debug( LDAP_DEBUG_ANY, "daemon: unsupported address family (%d)\n",
1112                                 (int) (*sal)->sa_family, 0, 0 );
1113                         break;
1114                 }
1115
1116                 AC_MEMCPY(&l.sl_sa, *sal, addrlen);
1117                 ber_str2bv( url, 0, 1, &l.sl_url);
1118                 li = ch_malloc( sizeof( Listener ) );
1119                 *li = l;
1120                 slap_listeners[*cur] = li;
1121                 (*cur)++;
1122                 sal++;
1123         }
1124
1125         slap_free_listener_addresses(psal);
1126
1127         if ( l.sl_url.bv_val == NULL ) {
1128                 Debug( LDAP_DEBUG_TRACE,
1129                         "slap_open_listener: failed on %s\n", url, 0, 0 );
1130                 return -1;
1131         }
1132
1133         Debug( LDAP_DEBUG_TRACE, "daemon: listener initialized %s\n",
1134                 l.sl_url.bv_val, 0, 0 );
1135         return 0;
1136 }
1137
1138 static int sockinit(void);
1139 static int sockdestroy(void);
1140
1141 int slapd_daemon_init( const char *urls )
1142 {
1143         int i, j, n, rc;
1144         char **u;
1145
1146         Debug( LDAP_DEBUG_ARGS, "daemon_init: %s\n",
1147                 urls ? urls : "<null>", 0, 0 );
1148
1149         ldap_pvt_thread_mutex_init( &slap_daemon.sd_mutex );
1150 #ifdef HAVE_TCPD
1151         ldap_pvt_thread_mutex_init( &slap_daemon.tcpd_mutex );
1152 #endif
1153
1154         if( (rc = sockinit()) != 0 ) return rc;
1155
1156 #ifdef HAVE_SYSCONF
1157         dtblsize = sysconf( _SC_OPEN_MAX );
1158 #elif HAVE_GETDTABLESIZE
1159         dtblsize = getdtablesize();
1160 #else
1161         dtblsize = FD_SETSIZE;
1162 #endif
1163
1164         /* open a pipe (or something equivalent connected to itself).
1165          * we write a byte on this fd whenever we catch a signal. The main
1166          * loop will be select'ing on this socket, and will wake up when
1167          * this byte arrives.
1168          */
1169         if( (rc = lutil_pair( wake_sds )) < 0 ) {
1170                 Debug( LDAP_DEBUG_ANY,
1171                         "daemon: lutil_pair() failed rc=%d\n", rc, 0, 0 );
1172                 return rc;
1173         }
1174
1175         SLAP_SOCK_SET_INIT;
1176
1177         if( urls == NULL ) urls = "ldap:///";
1178
1179         u = ldap_str2charray( urls, " " );
1180
1181         if( u == NULL || u[0] == NULL ) {
1182                 Debug( LDAP_DEBUG_ANY, "daemon_init: no urls (%s) provided.\n",
1183                         urls, 0, 0 );
1184                 if ( u )
1185                         ldap_charray_free( u );
1186                 return -1;
1187         }
1188
1189         for( i=0; u[i] != NULL; i++ ) {
1190                 Debug( LDAP_DEBUG_TRACE, "daemon_init: listen on %s\n",
1191                         u[i], 0, 0 );
1192         }
1193
1194         if( i == 0 ) {
1195                 Debug( LDAP_DEBUG_ANY, "daemon_init: no listeners to open (%s)\n",
1196                         urls, 0, 0 );
1197                 ldap_charray_free( u );
1198                 return -1;
1199         }
1200
1201         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners to open...\n",
1202                 i, 0, 0 );
1203         slap_listeners = ch_malloc( (i+1)*sizeof(Listener *) );
1204
1205         for(n = 0, j = 0; u[n]; n++ ) {
1206                 if ( slap_open_listener( u[n], &i, &j ) ) {
1207                         ldap_charray_free( u );
1208                         return -1;
1209                 }
1210         }
1211         slap_listeners[j] = NULL;
1212
1213         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners opened\n",
1214                 i, 0, 0 );
1215
1216
1217 #ifdef HAVE_SLP
1218         if( slapd_register_slp ) {
1219                 slapd_slp_init( urls );
1220                 slapd_slp_reg();
1221         }
1222 #endif
1223
1224         ldap_charray_free( u );
1225
1226         return !i;
1227 }
1228
1229
1230 int
1231 slapd_daemon_destroy(void)
1232 {
1233         connections_destroy();
1234         tcp_close( wake_sds[1] );
1235         tcp_close( wake_sds[0] );
1236         sockdestroy();
1237
1238 #ifdef HAVE_SLP
1239         if( slapd_register_slp ) {
1240                 slapd_slp_dereg();
1241                 slapd_slp_deinit();
1242         }
1243 #endif
1244
1245 #ifdef HAVE_TCPD
1246         ldap_pvt_thread_mutex_destroy( &slap_daemon.tcpd_mutex );
1247 #endif
1248
1249         ldap_pvt_thread_mutex_destroy( &slap_daemon.sd_mutex );
1250         return 0;
1251 }
1252
1253
1254 static void
1255 close_listeners(
1256         int remove )
1257 {
1258         int l;
1259
1260         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1261                 Listener *lr = slap_listeners[l];
1262
1263                 if ( lr->sl_sd != AC_SOCKET_INVALID ) {
1264                         if ( remove ) slapd_remove( lr->sl_sd, 0, 0, 0 );
1265
1266 #ifdef LDAP_PF_LOCAL
1267                         if ( lr->sl_sa.sa_addr.sa_family == AF_LOCAL ) {
1268                                 unlink( lr->sl_sa.sa_un_addr.sun_path );
1269                         }
1270 #endif /* LDAP_PF_LOCAL */
1271
1272                         slapd_close( lr->sl_sd );
1273                 }
1274
1275                 if ( lr->sl_url.bv_val ) {
1276                         ber_memfree( lr->sl_url.bv_val );
1277                 }
1278
1279                 if ( lr->sl_name.bv_val ) {
1280                         ber_memfree( lr->sl_name.bv_val );
1281                 }
1282
1283                 free( lr );
1284                 slap_listeners[l] = NULL;
1285         }
1286 }
1287
1288 static int
1289 slap_listener(
1290         Listener *sl )
1291 {
1292         Sockaddr                from;
1293
1294         ber_socket_t s;
1295         socklen_t len = sizeof(from);
1296         long id;
1297         slap_ssf_t ssf = 0;
1298         struct berval authid = BER_BVNULL;
1299 #ifdef SLAPD_RLOOKUPS
1300         char hbuf[NI_MAXHOST];
1301 #endif
1302
1303         char    *dnsname = NULL;
1304         char    *peeraddr = NULL;
1305 #ifdef LDAP_PF_LOCAL
1306         char peername[MAXPATHLEN + sizeof("PATH=")];
1307 #elif defined(LDAP_PF_INET6)
1308         char peername[sizeof("IP=ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 65535")];
1309 #else
1310         char peername[sizeof("IP=255.255.255.255:65336")];
1311 #endif /* LDAP_PF_LOCAL */
1312
1313         peername[0] = '\0';
1314
1315 #ifdef LDAP_CONNECTIONLESS
1316         if ( sl->sl_is_udp ) return 1;
1317 #endif
1318
1319 #  ifdef LDAP_PF_LOCAL
1320         /* FIXME: apparently accept doesn't fill
1321          * the sun_path sun_path member */
1322         from.sa_un_addr.sun_path[0] = '\0';
1323 #  endif /* LDAP_PF_LOCAL */
1324
1325         s = accept( sl->sl_sd, (struct sockaddr *) &from, &len );
1326
1327 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1328         /* Resume the listener FD to allow concurrent-processing of
1329          * additional incoming connections.
1330          */
1331         sl->sl_busy = 0;
1332         WAKE_LISTENER(1);
1333 #endif
1334
1335         if ( s == AC_SOCKET_INVALID ) {
1336                 int err = sock_errno();
1337
1338                 if(
1339 #ifdef EMFILE
1340                     err == EMFILE ||
1341 #endif
1342 #ifdef ENFILE
1343                     err == ENFILE ||
1344 #endif
1345                     0 )
1346                 {
1347                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1348                         emfile++;
1349                         /* Stop listening until an existing session closes */
1350                         sl->sl_mute = 1;
1351                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1352                 }
1353
1354                 Debug( LDAP_DEBUG_ANY,
1355                         "daemon: accept(%ld) failed errno=%d (%s)\n",
1356                         (long) sl->sl_sd, err, sock_errstr(err) );
1357                 ldap_pvt_thread_yield();
1358                 return 0;
1359         }
1360
1361 #ifndef HAVE_WINSOCK
1362         /* make sure descriptor number isn't too great */
1363         if ( s >= dtblsize ) {
1364                 Debug( LDAP_DEBUG_ANY,
1365                         "daemon: %ld beyond descriptor table size %ld\n",
1366                         (long) s, (long) dtblsize, 0 );
1367
1368                 slapd_close(s);
1369                 ldap_pvt_thread_yield();
1370                 return 0;
1371         }
1372 #endif
1373
1374 #ifdef LDAP_DEBUG
1375         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1376         /* newly accepted stream should not be in any of the FD SETS */
1377         assert( SLAP_SOCK_NOT_ACTIVE( s ));
1378         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1379 #endif
1380
1381 #if defined( SO_KEEPALIVE ) || defined( TCP_NODELAY )
1382 #ifdef LDAP_PF_LOCAL
1383         /* for IPv4 and IPv6 sockets only */
1384         if ( from.sa_addr.sa_family != AF_LOCAL )
1385 #endif /* LDAP_PF_LOCAL */
1386         {
1387                 int rc;
1388                 int tmp;
1389 #ifdef SO_KEEPALIVE
1390                 /* enable keep alives */
1391                 tmp = 1;
1392                 rc = setsockopt( s, SOL_SOCKET, SO_KEEPALIVE,
1393                         (char *) &tmp, sizeof(tmp) );
1394                 if ( rc == AC_SOCKET_ERROR ) {
1395                         int err = sock_errno();
1396                         Debug( LDAP_DEBUG_ANY,
1397                                 "slapd(%ld): setsockopt(SO_KEEPALIVE) failed "
1398                                 "errno=%d (%s)\n", (long) s, err, sock_errstr(err) );
1399                 }
1400 #endif
1401 #ifdef TCP_NODELAY
1402                 /* enable no delay */
1403                 tmp = 1;
1404                 rc = setsockopt( s, IPPROTO_TCP, TCP_NODELAY,
1405                         (char *)&tmp, sizeof(tmp) );
1406                 if ( rc == AC_SOCKET_ERROR ) {
1407                         int err = sock_errno();
1408                         Debug( LDAP_DEBUG_ANY,
1409                                 "slapd(%ld): setsockopt(TCP_NODELAY) failed "
1410                                 "errno=%d (%s)\n", (long) s, err, sock_errstr(err) );
1411                 }
1412 #endif
1413         }
1414 #endif
1415
1416         Debug( LDAP_DEBUG_CONNS,
1417                 "daemon: listen=%ld, new connection on %ld\n",
1418                 (long) sl->sl_sd, (long) s, 0 );
1419
1420         switch ( from.sa_addr.sa_family ) {
1421 #  ifdef LDAP_PF_LOCAL
1422         case AF_LOCAL:
1423                 /* FIXME: apparently accept doesn't fill
1424                  * the sun_path sun_path member */
1425                 if ( from.sa_un_addr.sun_path[0] == '\0' ) {
1426                         AC_MEMCPY( from.sa_un_addr.sun_path,
1427                                         sl->sl_sa.sa_un_addr.sun_path,
1428                                         sizeof( from.sa_un_addr.sun_path ) );
1429                 }
1430
1431                 sprintf( peername, "PATH=%s", from.sa_un_addr.sun_path );
1432                 ssf = local_ssf;
1433                 {
1434                         uid_t uid;
1435                         gid_t gid;
1436
1437                         if( getpeereid( s, &uid, &gid ) == 0 ) {
1438                                 authid.bv_val = ch_malloc(
1439                                         STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
1440                                         "cn=peercred,cn=external,cn=auth" ) + 1 );
1441                                 authid.bv_len = sprintf( authid.bv_val,
1442                                         "gidNumber=%d+uidNumber=%d,"
1443                                         "cn=peercred,cn=external,cn=auth",
1444                                         (int) gid, (int) uid );
1445                                 assert( authid.bv_len <=
1446                                         STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
1447                                         "cn=peercred,cn=external,cn=auth" ) );
1448                         }
1449                 }
1450                 dnsname = "local";
1451                 break;
1452 #endif /* LDAP_PF_LOCAL */
1453
1454 #  ifdef LDAP_PF_INET6
1455         case AF_INET6:
1456         if ( IN6_IS_ADDR_V4MAPPED(&from.sa_in6_addr.sin6_addr) ) {
1457                 peeraddr = inet_ntoa( *((struct in_addr *)
1458                                         &from.sa_in6_addr.sin6_addr.s6_addr[12]) );
1459                 sprintf( peername, "IP=%s:%d",
1460                          peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1461                          (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
1462         } else {
1463                 char addr[INET6_ADDRSTRLEN];
1464
1465                 peeraddr = (char *) inet_ntop( AF_INET6,
1466                                       &from.sa_in6_addr.sin6_addr,
1467                                       addr, sizeof addr );
1468                 sprintf( peername, "IP=%s %d",
1469                          peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1470                          (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
1471         }
1472         break;
1473 #  endif /* LDAP_PF_INET6 */
1474
1475         case AF_INET:
1476         peeraddr = inet_ntoa( from.sa_in_addr.sin_addr );
1477         sprintf( peername, "IP=%s:%d",
1478                 peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1479                 (unsigned) ntohs( from.sa_in_addr.sin_port ) );
1480                 break;
1481
1482         default:
1483                 slapd_close(s);
1484                 return 0;
1485         }
1486
1487         if ( ( from.sa_addr.sa_family == AF_INET )
1488 #ifdef LDAP_PF_INET6
1489                 || ( from.sa_addr.sa_family == AF_INET6 )
1490 #endif
1491                 )
1492         {
1493                 dnsname = NULL;
1494 #ifdef SLAPD_RLOOKUPS
1495                 if ( use_reverse_lookup ) {
1496                         char *herr;
1497                         if (ldap_pvt_get_hname( (const struct sockaddr *)&from, len, hbuf,
1498                                 sizeof(hbuf), &herr ) == 0) {
1499                                 ldap_pvt_str2lower( hbuf );
1500                                 dnsname = hbuf;
1501                         }
1502                 }
1503 #endif /* SLAPD_RLOOKUPS */
1504
1505 #ifdef HAVE_TCPD
1506                 {
1507                         int rc;
1508                         ldap_pvt_thread_mutex_lock( &slap_daemon.tcpd_mutex );
1509                         rc = hosts_ctl("slapd",
1510                                 dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1511                                 peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1512                                 SLAP_STRING_UNKNOWN );
1513                         ldap_pvt_thread_mutex_unlock( &slap_daemon.tcpd_mutex );
1514                         if ( !rc ) {
1515                                 /* DENY ACCESS */
1516                                 Statslog( LDAP_DEBUG_STATS,
1517                                         "fd=%ld DENIED from %s (%s)\n",
1518                                         (long) s,
1519                                         dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1520                                         peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1521                                         0, 0 );
1522                                 slapd_close(s);
1523                                 return 0;
1524                         }
1525                 }
1526 #endif /* HAVE_TCPD */
1527         }
1528
1529         id = connection_init(s, sl,
1530                 dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1531                 peername,
1532 #ifdef HAVE_TLS
1533                 sl->sl_is_tls ? CONN_IS_TLS : 0,
1534 #else
1535                 0,
1536 #endif
1537                 ssf,
1538                 authid.bv_val ? &authid : NULL );
1539
1540         if( authid.bv_val ) ch_free(authid.bv_val);
1541
1542         if( id < 0 ) {
1543                 Debug( LDAP_DEBUG_ANY,
1544                         "daemon: connection_init(%ld, %s, %s) failed.\n",
1545                         (long) s, peername, sl->sl_name.bv_val );
1546                 slapd_close(s);
1547                 return 0;
1548         }
1549
1550         Statslog( LDAP_DEBUG_STATS,
1551                 "conn=%ld fd=%ld ACCEPT from %s (%s)\n",
1552                 id, (long) s, peername, sl->sl_name.bv_val,
1553                 0 );
1554
1555         return 0;
1556 }
1557
1558 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1559 static void*
1560 slap_listener_thread(
1561         void* ctx,
1562         void* ptr )
1563 {
1564         int rc;
1565
1566         rc = slap_listener( (Listener*)ptr );
1567
1568         if( rc != LDAP_SUCCESS ) {
1569                 Debug( LDAP_DEBUG_ANY,
1570                         "listener_thread: failed %d", rc, 0, 0 );
1571         }
1572
1573         return (void*)NULL;
1574 }
1575
1576 static int
1577 slap_listener_activate(
1578         Listener* sl )
1579 {
1580         int rc;
1581
1582         Debug( LDAP_DEBUG_TRACE, "slap_listener_activate(%d): %s\n",
1583                 sl->sl_sd, sl->sl_busy ? "busy" : "", 0 );
1584
1585         sl->sl_busy++;
1586
1587         rc = ldap_pvt_thread_pool_submit( &connection_pool,
1588                 slap_listener_thread, (void *) sl );
1589
1590         if( rc != 0 ) {
1591                 Debug( LDAP_DEBUG_ANY,
1592                         "listener_activate(%d): submit failed (%d)\n",
1593                         sl->sl_sd, rc, 0 );
1594         }
1595         return rc;
1596 }
1597 #endif
1598
1599 static void *
1600 slapd_daemon_task(
1601         void *ptr )
1602 {
1603         int l;
1604         time_t last_idle_check = 0;
1605         struct timeval idle;
1606         int ebadf = 0;
1607
1608 #define SLAPD_IDLE_CHECK_LIMIT 4
1609
1610         if ( global_idletimeout > 0 ) {
1611                 last_idle_check = slap_get_time();
1612                 /* Set the select timeout.
1613                  * Don't just truncate, preserve the fractions of
1614                  * seconds to prevent sleeping for zero time.
1615                  */
1616                 idle.tv_sec = global_idletimeout / SLAPD_IDLE_CHECK_LIMIT;
1617                 idle.tv_usec = global_idletimeout - \
1618                         ( idle.tv_sec * SLAPD_IDLE_CHECK_LIMIT );
1619                 idle.tv_usec *= 1000000 / SLAPD_IDLE_CHECK_LIMIT;
1620         } else {
1621                 idle.tv_sec = 0;
1622                 idle.tv_usec = 0;
1623         }
1624
1625         slapd_add( wake_sds[0], 0, NULL );
1626
1627         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1628                 if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) continue;
1629
1630 #ifdef LDAP_CONNECTIONLESS
1631                 /* Since this is connectionless, the data port is the
1632                  * listening port. The listen() and accept() calls
1633                  * are unnecessary.
1634                  */
1635                 if ( slap_listeners[l]->sl_is_udp )
1636                         continue;
1637 #endif
1638
1639                 if ( listen( slap_listeners[l]->sl_sd, SLAPD_LISTEN_BACKLOG ) == -1 ) {
1640                         int err = sock_errno();
1641
1642 #ifdef LDAP_PF_INET6
1643                         /* If error is EADDRINUSE, we are trying to listen to INADDR_ANY and
1644                          * we are already listening to in6addr_any, then we want to ignore
1645                          * this and continue.
1646                          */
1647                         if ( err == EADDRINUSE ) {
1648                                 int i;
1649                                 struct sockaddr_in sa = slap_listeners[l]->sl_sa.sa_in_addr;
1650                                 struct sockaddr_in6 sa6;
1651
1652                                 if ( sa.sin_family == AF_INET &&
1653                                      sa.sin_addr.s_addr == htonl(INADDR_ANY) ) {
1654                                         for ( i = 0 ; i < l; i++ ) {
1655                                                 sa6 = slap_listeners[i]->sl_sa.sa_in6_addr;
1656                                                 if ( sa6.sin6_family == AF_INET6 &&
1657                                                      !memcmp( &sa6.sin6_addr, &in6addr_any,
1658                                                                 sizeof(struct in6_addr) ) )
1659                                                 {
1660                                                         break;
1661                                                 }
1662                                         }
1663
1664                                         if ( i < l ) {
1665                                                 /* We are already listening to in6addr_any */
1666                                                 Debug( LDAP_DEBUG_CONNS,
1667                                                         "daemon: Attempt to listen to 0.0.0.0 failed, "
1668                                                         "already listening on ::, assuming IPv4 included\n",
1669                                                         0, 0, 0 );
1670                                                 slapd_close( slap_listeners[l]->sl_sd );
1671                                                 slap_listeners[l]->sl_sd = AC_SOCKET_INVALID;
1672                                                 continue;
1673                                         }
1674                                 }
1675                         }
1676 #endif
1677                         Debug( LDAP_DEBUG_ANY,
1678                                 "daemon: listen(%s, 5) failed errno=%d (%s)\n",
1679                                         slap_listeners[l]->sl_url.bv_val, err,
1680                                         sock_errstr(err) );
1681                         return (void*)-1;
1682                 }
1683
1684 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1685                 /* make the listening socket non-blocking */
1686                 if ( ber_pvt_socket_set_nonblock( slap_listeners[l]->sl_sd, 1 ) < 0 ) {
1687                         Debug( LDAP_DEBUG_ANY, "slapd_daemon_task: "
1688                                 "set nonblocking on a listening socket failed\n",
1689                                 0, 0, 0 );
1690                         slapd_shutdown = 2;
1691                         return (void*)-1;
1692                 }
1693 #endif
1694
1695                 slapd_add( slap_listeners[l]->sl_sd, 0, slap_listeners[l] );
1696         }
1697
1698 #ifdef HAVE_NT_SERVICE_MANAGER
1699         if ( started_event != NULL ) {
1700                 ldap_pvt_thread_cond_signal( &started_event );
1701         }
1702 #endif
1703
1704 #ifdef SLAP_SEM_LOAD_CONTROL
1705         /*
1706          * initialize count and lazyness of a semaphore
1707          */
1708         (void) ldap_lazy_sem_init(
1709                 SLAP_MAX_WORKER_THREADS + 4 /* max workers + margin */,
1710                 4 /* lazyness */ );
1711 #endif
1712
1713         /* initialization complete. Here comes the loop. */
1714
1715         while ( !slapd_shutdown ) {
1716                 ber_socket_t i;
1717                 int ns, nwriters;
1718                 int at;
1719                 ber_socket_t nfds;
1720 #if SLAP_EVENTS_ARE_INDEXED
1721                 ber_socket_t nrfds, nwfds;
1722 #endif
1723 #define SLAPD_EBADF_LIMIT 16
1724
1725                 time_t  now;
1726
1727                 SLAP_EVENT_DECL;
1728
1729                 struct timeval          tv;
1730                 struct timeval          *tvp;
1731
1732                 struct timeval          cat;
1733                 time_t                          tdelta = 1;
1734                 struct re_s*            rtask;
1735                 now = slap_get_time();
1736
1737                 if( ( global_idletimeout > 0 ) &&
1738                         difftime( last_idle_check +
1739                         global_idletimeout/SLAPD_IDLE_CHECK_LIMIT, now ) < 0 ) {
1740                         connections_timeout_idle( now );
1741                         last_idle_check = now;
1742                 }
1743                 tv = idle;
1744
1745 #ifdef SIGHUP
1746                 if( slapd_gentle_shutdown ) {
1747                         ber_socket_t active;
1748
1749                         if( slapd_gentle_shutdown == 1 ) {
1750                                 BackendDB *be;
1751                                 Debug( LDAP_DEBUG_ANY, "slapd gentle shutdown\n", 0, 0, 0 );
1752                                 close_listeners( 1 );
1753                                 frontendDB->be_restrictops |= SLAP_RESTRICT_OP_WRITES;
1754                                 LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
1755                                         be->be_restrictops |= SLAP_RESTRICT_OP_WRITES;
1756                                 }
1757                                 slapd_gentle_shutdown = 2;
1758                         }
1759
1760                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1761                         active = slap_daemon.sd_nactives;
1762                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1763                         if( active == 0 ) {
1764                                 slapd_shutdown = 1;
1765                                 break;
1766                         }
1767                 }
1768 #endif
1769                 at = 0;
1770
1771                 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1772
1773                 nwriters = slap_daemon.sd_nwriters;
1774
1775                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1776                         Listener *lr = slap_listeners[l];
1777
1778                         if ( lr->sl_sd == AC_SOCKET_INVALID ) continue;
1779
1780 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1781                         if ( lr->sl_mute || lr->sl_busy )
1782 #else
1783                         if ( lr->sl_mute )
1784 #endif
1785                         {
1786                             SLAP_SOCK_CLR_READ( lr->sl_sd );
1787                         } else {
1788                                 SLAP_SOCK_SET_READ( lr->sl_sd );
1789                         }
1790                 }
1791
1792                 SLAP_EVENT_INIT;
1793
1794                 nfds = SLAP_EVENT_MAX;
1795
1796                 if ( global_idletimeout && slap_daemon.sd_nactives ) at = 1;
1797
1798                 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1799
1800                 if ( at
1801 #if defined(HAVE_YIELDING_SELECT) || defined(NO_THREADS)
1802                         &&  ( tv.tv_sec || tv.tv_usec )
1803 #endif
1804                         )
1805                 {
1806                         tvp = &tv;
1807                 } else {
1808                         tvp = NULL;
1809                 }
1810
1811                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
1812                 rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
1813                 while ( rtask && cat.tv_sec && cat.tv_sec <= now ) {
1814                         if ( ldap_pvt_runqueue_isrunning( &slapd_rq, rtask )) {
1815                                 ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
1816                         } else {
1817                                 ldap_pvt_runqueue_runtask( &slapd_rq, rtask );
1818                                 ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
1819                                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
1820                                 ldap_pvt_thread_pool_submit( &connection_pool,
1821                                         rtask->routine, (void *) rtask );
1822                                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
1823                         }
1824                         rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
1825                 }
1826                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
1827
1828                 if ( rtask && cat.tv_sec ) {
1829                         time_t diff = difftime( cat.tv_sec, now );
1830                         if ( diff == 0 ) diff = tdelta;
1831                         if ( tvp == NULL || diff < tv.tv_sec ) {
1832                                 tv.tv_sec = diff;
1833                                 tv.tv_usec = 0;
1834                                 tvp = &tv;
1835                         }
1836                 }
1837
1838                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1839                         Listener *lr = slap_listeners[l];
1840
1841                         if ( lr->sl_sd == AC_SOCKET_INVALID ) {
1842                                 continue;
1843                         }
1844
1845                         if ( lr->sl_mute ) {
1846                                 Debug( LDAP_DEBUG_CONNS,
1847                                         "daemon: select: listen=%d muted\n",
1848                                         lr->sl_sd, 0, 0 );
1849                                 continue;
1850                         }
1851
1852 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1853                         if ( lr->sl_busy ) {
1854                                 Debug( LDAP_DEBUG_CONNS,
1855                                         "daemon: select: listen=%d busy\n",
1856                                         lr->sl_sd, 0, 0 );
1857                                 continue;
1858                         }
1859 #endif
1860
1861                         Debug( LDAP_DEBUG_CONNS,
1862                                 "daemon: select: listen=%d active_threads=%d tvp=%s\n",
1863                                 lr->sl_sd, at, tvp == NULL ? "NULL" : "zero" );
1864                 }
1865
1866                 switch(ns = SLAP_EVENT_WAIT(tvp)) {
1867                 case -1: {      /* failure - try again */
1868                                 int err = sock_errno();
1869
1870                                 if( err != EINTR ) {
1871                                         ebadf++;
1872
1873                                         /* Don't log unless we got it twice in a row */
1874                                         if ( !( ebadf & 1 )) {
1875                                                 Debug( LDAP_DEBUG_ANY,
1876                                                         "daemon: select failed count %d err (%d): %s\n",
1877                                                         ebadf, err, sock_errstr(err) );
1878                                         }
1879                                         if ( ebadf >= SLAPD_EBADF_LIMIT )
1880                                                 slapd_shutdown = 2;
1881                                 }
1882                         }
1883                         continue;
1884
1885                 case 0:         /* timeout - let threads run */
1886                         ebadf = 0;
1887 #ifndef HAVE_YIELDING_SELECT
1888                         Debug( LDAP_DEBUG_CONNS, "daemon: select timeout - yielding\n",
1889                             0, 0, 0 );
1890
1891                         ldap_pvt_thread_yield();
1892 #endif
1893                         continue;
1894
1895                 default:        /* something happened - deal with it */
1896                         if( slapd_shutdown ) continue;
1897
1898                         ebadf = 0;
1899                         Debug( LDAP_DEBUG_CONNS,
1900                                 "daemon: activity on %d descriptor%s\n",
1901                                 ns, ns != 1 ? "s" : "", 0 );
1902                         /* FALL THRU */
1903                 }
1904
1905 #if SLAP_EVENTS_ARE_INDEXED
1906                 if ( SLAP_EVENT_IS_READ( wake_sds[0] )) {
1907                         char c[BUFSIZ];
1908                         SLAP_EVENT_CLR_READ( wake_sds[0] );
1909                         waking = 0;
1910                         tcp_read( wake_sds[0], c, sizeof(c) );
1911                         Debug( LDAP_DEBUG_CONNS, "daemon: waked\n", 0, 0, 0 );
1912                         continue;
1913                 }
1914
1915                 /* The event slot equals the descriptor number - this is
1916                  * true for Unix select and poll. We treat Windows select
1917                  * like this too, even though it's a kludge.
1918                  */
1919                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1920                         int rc;
1921
1922                         if ( ns <= 0 ) break;
1923                         if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) continue;
1924 #ifdef LDAP_CONNECTIONLESS
1925                         if ( slap_listeners[l]->sl_is_udp ) continue;
1926 #endif
1927                         if ( !SLAP_EVENT_IS_READ( slap_listeners[l]->sl_sd )) continue;
1928
1929                         /* clear events */
1930                         SLAP_EVENT_CLR_READ( slap_listeners[l]->sl_sd );
1931                         SLAP_EVENT_CLR_WRITE( slap_listeners[l]->sl_sd );
1932                         ns--;
1933
1934 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1935                         rc = slap_listener_activate(slap_listeners[l]);
1936 #else
1937                         rc = slap_listener(slap_listeners[l]);
1938 #endif
1939                 }
1940
1941                 /* bypass the following tests if no descriptors left */
1942                 if ( ns <= 0 ) {
1943 #ifndef HAVE_YIELDING_SELECT
1944                         ldap_pvt_thread_yield();
1945 #endif
1946                         continue;
1947                 }
1948
1949                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
1950 #ifdef HAVE_WINSOCK
1951                 nrfds = readfds.fd_count;
1952                 nwfds = writefds.fd_count;
1953                 for ( i = 0; i < readfds.fd_count; i++ ) {
1954                         Debug( LDAP_DEBUG_CONNS, " %d%s",
1955                                 readfds.fd_array[i], "r", 0 );
1956                 }
1957                 for ( i = 0; i < writefds.fd_count; i++ ) {
1958                         Debug( LDAP_DEBUG_CONNS, " %d%s",
1959                                 writefds.fd_array[i], "w", 0 );
1960                 }
1961
1962 #else
1963                 nrfds = 0;
1964                 nwfds = 0;
1965                 for ( i = 0; i < nfds; i++ ) {
1966                         int     r, w;
1967
1968                         r = SLAP_EVENT_IS_READ( i );
1969                         /* writefds was not initialized if nwriters was zero */
1970                         w = nwriters ? SLAP_EVENT_IS_WRITE( i ) : 0;
1971                         if ( r || w ) {
1972                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", i,
1973                                     r ? "r" : "", w ? "w" : "" );
1974                                 if ( r ) {
1975                                         nrfds++;
1976                                         ns--;
1977                                 }
1978                                 if ( w ) {
1979                                         nwfds++;
1980                                         ns--;
1981                                 }
1982                         }
1983                         if ( ns <= 0 ) break;
1984                 }
1985 #endif
1986                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
1987
1988
1989                 /* loop through the writers */
1990                 for ( i = 0; nwfds > 0; i++ ) {
1991                         ber_socket_t wd;
1992 #ifdef HAVE_WINSOCK
1993                         wd = writefds.fd_array[i];
1994 #else
1995                         if( ! SLAP_EVENT_IS_WRITE( i ) ) continue;
1996                         wd = i;
1997 #endif
1998
1999                         SLAP_EVENT_CLR_WRITE( wd );
2000                         nwfds--;
2001
2002                         Debug( LDAP_DEBUG_CONNS,
2003                                 "daemon: write active on %d\n",
2004                                 wd, 0, 0 );
2005
2006                         /*
2007                          * NOTE: it is possible that the connection was closed
2008                          * and that the stream is now inactive.
2009                          * connection_write() must validate the stream is still
2010                          * active.
2011                          *
2012                          * ITS#4338: if the stream is invalid, there is no need to
2013                          * close it here. It has already been closed in connection.c.
2014                          */
2015                         if ( connection_write( wd ) < 0 ) {
2016                                 if ( SLAP_EVENT_IS_READ( wd )) {
2017                                         SLAP_EVENT_CLR_READ( (unsigned) wd );
2018                                         nrfds--;
2019                                 }
2020                         }
2021                 }
2022
2023                 for ( i = 0; nrfds > 0; i++ ) {
2024                         ber_socket_t rd;
2025 #ifdef HAVE_WINSOCK
2026                         rd = readfds.fd_array[i];
2027 #else
2028                         if( ! SLAP_EVENT_IS_READ( i ) ) continue;
2029                         rd = i;
2030 #endif
2031                         SLAP_EVENT_CLR_READ( rd );
2032                         nrfds--;
2033
2034                         Debug ( LDAP_DEBUG_CONNS,
2035                                 "daemon: read activity on %d\n", rd, 0, 0 );
2036                         /*
2037                          * NOTE: it is possible that the connection was closed
2038                          * and that the stream is now inactive.
2039                          * connection_read() must valid the stream is still
2040                          * active.
2041                          */
2042
2043 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2044                         connection_read_activate( rd );
2045 #else
2046                         connection_read( rd );
2047 #endif
2048                 }
2049 #else   /* !SLAP_EVENTS_ARE_INDEXED */
2050         /* FIXME */
2051         /* The events are returned in an arbitrary list. This is true
2052          * for /dev/poll, epoll and kqueue. In order to prioritize things
2053          * so that we can handle wake_sds first, listeners second, and then
2054          * all other connections last (as we do for select), we would need
2055          * to use multiple event handles and cascade them.
2056          *
2057          * That seems like a bit of hassle. So the wake_sds check has been
2058          * skipped. For epoll and kqueue we can associate arbitrary data with
2059          * an event, so we could use pointers to the listener structure
2060          * instead of just the file descriptor. For /dev/poll we have to
2061          * search the listeners array for a matching descriptor.
2062          *
2063          * We now handle wake events when we see them; they are not given
2064          * higher priority.
2065          */
2066 #ifdef LDAP_DEBUG
2067                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
2068
2069                 for (i=0; i<ns; i++) {
2070                         int     r, w;
2071
2072                         /* Don't log listener events */
2073                         if ( SLAP_EVENT_IS_LISTENER(i)
2074 #ifdef LDAP_CONNECTIONLESS
2075                                 && !((SLAP_EVENT_LISTENER(i))->sl_is_udp)
2076 #endif
2077                                 )
2078                         {
2079                                 continue;
2080                         }
2081
2082                         /* Don't log internal wake events */
2083                         if ( SLAP_EVENT_FD( i ) == wake_sds[0] ) continue;
2084
2085                         r = SLAP_EVENT_IS_READ( i );
2086                         w = SLAP_EVENT_IS_WRITE( i );
2087                         if ( r || w ) {
2088                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", SLAP_EVENT_FD(i),
2089                                     r ? "r" : "", w ? "w" : "" );
2090                         }
2091                 }
2092                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
2093 #endif
2094
2095                 for (i=0; i<ns; i++) {
2096                         int rc = 1, fd, waswrite = 0;
2097
2098                         if ( SLAP_EVENT_IS_LISTENER(i) ) {
2099 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2100                                 rc = slap_listener_activate( SLAP_EVENT_LISTENER( i ));
2101 #else
2102                                 rc = slap_listener( SLAP_EVENT_LISTENER( i ));
2103 #endif
2104                         }
2105
2106                         /* If we found a regular listener, rc is now zero, and we
2107                          * can skip the data portion. But if it was a UDP listener
2108                          * then rc is still 1, and we want to handle the data.
2109                          */
2110                         if ( rc ) {
2111                                 fd = SLAP_EVENT_FD( i );
2112
2113                                 /* Handle wake events */
2114                                 if ( fd == wake_sds[0] ) {
2115                                         char c[BUFSIZ];
2116                                         waking = 0;
2117                                         tcp_read( wake_sds[0], c, sizeof(c) );
2118                                         break;
2119                                 }
2120
2121                                 if( SLAP_EVENT_IS_WRITE( i ) ) {
2122                                         Debug( LDAP_DEBUG_CONNS,
2123                                                 "daemon: write active on %d\n",
2124                                                 fd, 0, 0 );
2125
2126                                         waswrite = 1;
2127
2128                                         /*
2129                                          * NOTE: it is possible that the connection was closed
2130                                          * and that the stream is now inactive.
2131                                          * connection_write() must valid the stream is still
2132                                          * active.
2133                                          */
2134                                         if ( connection_write( fd ) < 0 ) {
2135                                                 continue;
2136                                         }
2137                                 }
2138                                 /* If event is a read or an error */
2139                                 if( SLAP_EVENT_IS_READ( i ) || !waswrite ) {
2140                                         Debug( LDAP_DEBUG_CONNS,
2141                                                 "daemon: read active on %d\n",
2142                                                 fd, 0, 0 );
2143
2144 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2145                                         connection_read_activate( fd );
2146 #else
2147                                         /*
2148                                          * NOTE: it is possible that the connection was closed
2149                                          * and that the stream is now inactive.
2150                                          * connection_read() must valid the stream is still
2151                                          * active.
2152                                          */
2153                                         connection_read( fd );
2154 #endif
2155                                 }
2156                         }
2157                 }
2158 #endif  /* SLAP_EVENTS_ARE_INDEXED */
2159
2160 #ifndef HAVE_YIELDING_SELECT
2161                 ldap_pvt_thread_yield();
2162 #endif
2163         }
2164
2165         if( slapd_shutdown == 1 ) {
2166                 Debug( LDAP_DEBUG_ANY,
2167                         "daemon: shutdown requested and initiated.\n",
2168                         0, 0, 0 );
2169
2170         } else if ( slapd_shutdown == 2 ) {
2171 #ifdef HAVE_NT_SERVICE_MANAGER
2172                         Debug( LDAP_DEBUG_ANY,
2173                                "daemon: shutdown initiated by Service Manager.\n",
2174                                0, 0, 0);
2175 #else /* !HAVE_NT_SERVICE_MANAGER */
2176                         Debug( LDAP_DEBUG_ANY,
2177                                "daemon: abnormal condition, shutdown initiated.\n",
2178                                0, 0, 0 );
2179 #endif /* !HAVE_NT_SERVICE_MANAGER */
2180         } else {
2181                 Debug( LDAP_DEBUG_ANY,
2182                        "daemon: no active streams, shutdown initiated.\n",
2183                        0, 0, 0 );
2184         }
2185
2186         if( slapd_gentle_shutdown != 2 ) close_listeners ( 0 );
2187
2188         if( !slapd_gentle_shutdown ) {
2189                 slapd_abrupt_shutdown = 1;
2190                 connections_shutdown();
2191         }
2192
2193         Debug( LDAP_DEBUG_ANY,
2194             "slapd shutdown: waiting for %d threads to terminate\n",
2195             ldap_pvt_thread_pool_backload(&connection_pool), 0, 0 );
2196         ldap_pvt_thread_pool_destroy(&connection_pool, 1);
2197
2198         free ( slap_listeners );
2199         slap_listeners = NULL;
2200
2201         return NULL;
2202 }
2203
2204
2205 #ifdef LDAP_CONNECTIONLESS
2206 static int connectionless_init(void)
2207 {
2208         int l;
2209
2210         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2211                 Listener *lr = slap_listeners[l];
2212                 long id;
2213
2214                 if( !lr->sl_is_udp ) {
2215                         continue;
2216                 }
2217
2218                 id = connection_init( lr->sl_sd, lr, "", "", CONN_IS_UDP, (slap_ssf_t) 0, NULL );
2219
2220                 if( id < 0 ) {
2221                         Debug( LDAP_DEBUG_TRACE,
2222                                 "connectionless_init: failed on %s (%d)\n", lr->sl_url, lr->sl_sd, 0 );
2223                         return -1;
2224                 }
2225                 lr->sl_is_udp++;
2226         }
2227
2228         return 0;
2229 }
2230 #endif /* LDAP_CONNECTIONLESS */
2231
2232 int slapd_daemon( void )
2233 {
2234         int rc;
2235
2236         connections_init();
2237 #ifdef LDAP_CONNECTIONLESS
2238         connectionless_init();
2239 #endif
2240
2241 #define SLAPD_LISTENER_THREAD 1
2242 #if defined( SLAPD_LISTENER_THREAD )
2243         {
2244                 ldap_pvt_thread_t       listener_tid;
2245
2246                 /* listener as a separate THREAD */
2247                 rc = ldap_pvt_thread_create( &listener_tid,
2248                         0, slapd_daemon_task, NULL );
2249
2250                 if ( rc != 0 ) {
2251                         Debug( LDAP_DEBUG_ANY,
2252                         "listener ldap_pvt_thread_create failed (%d)\n", rc, 0, 0 );
2253                         return rc;
2254                 }
2255
2256                 /* wait for the listener thread to complete */
2257                 ldap_pvt_thread_join( listener_tid, (void *) NULL );
2258         }
2259 #else
2260         /* experimental code */
2261         slapd_daemon_task( NULL );
2262 #endif
2263
2264         return 0;
2265
2266 }
2267
2268 static int sockinit(void)
2269 {
2270 #if defined( HAVE_WINSOCK2 )
2271     WORD wVersionRequested;
2272         WSADATA wsaData;
2273         int err;
2274
2275         wVersionRequested = MAKEWORD( 2, 0 );
2276
2277         err = WSAStartup( wVersionRequested, &wsaData );
2278         if ( err != 0 ) {
2279                 /* Tell the user that we couldn't find a usable */
2280                 /* WinSock DLL.                                  */
2281                 return -1;
2282         }
2283
2284         /* Confirm that the WinSock DLL supports 2.0.*/
2285         /* Note that if the DLL supports versions greater    */
2286         /* than 2.0 in addition to 2.0, it will still return */
2287         /* 2.0 in wVersion since that is the version we      */
2288         /* requested.                                        */
2289
2290         if ( LOBYTE( wsaData.wVersion ) != 2 ||
2291                 HIBYTE( wsaData.wVersion ) != 0 )
2292         {
2293             /* Tell the user that we couldn't find a usable */
2294             /* WinSock DLL.                                  */
2295             WSACleanup();
2296             return -1;
2297         }
2298
2299         /* The WinSock DLL is acceptable. Proceed. */
2300 #elif defined( HAVE_WINSOCK )
2301         WSADATA wsaData;
2302         if ( WSAStartup( 0x0101, &wsaData ) != 0 ) return -1;
2303 #endif
2304
2305         return 0;
2306 }
2307
2308 static int sockdestroy(void)
2309 {
2310 #if defined( HAVE_WINSOCK2 ) || defined( HAVE_WINSOCK )
2311         WSACleanup();
2312 #endif
2313         return 0;
2314 }
2315
2316 RETSIGTYPE
2317 slap_sig_shutdown( int sig )
2318 {
2319 #if 0
2320         Debug(LDAP_DEBUG_TRACE, "slap_sig_shutdown: signal %d\n", sig, 0, 0);
2321 #endif
2322
2323         /*
2324          * If the NT Service Manager is controlling the server, we don't
2325          * want SIGBREAK to kill the server. For some strange reason,
2326          * SIGBREAK is generated when a user logs out.
2327          */
2328
2329 #if HAVE_NT_SERVICE_MANAGER && SIGBREAK
2330         if (is_NT_Service && sig == SIGBREAK) {
2331                 /* empty */;
2332         } else
2333 #endif
2334 #ifdef SIGHUP
2335         if (sig == SIGHUP && global_gentlehup && slapd_gentle_shutdown == 0) {
2336                 slapd_gentle_shutdown = 1;
2337         } else
2338 #endif
2339         {
2340                 slapd_shutdown = 1;
2341         }
2342
2343         WAKE_LISTENER(1);
2344
2345         /* reinstall self */
2346         (void) SIGNAL_REINSTALL( sig, slap_sig_shutdown );
2347 }
2348
2349 RETSIGTYPE
2350 slap_sig_wake( int sig )
2351 {
2352         WAKE_LISTENER(1);
2353
2354         /* reinstall self */
2355         (void) SIGNAL_REINSTALL( sig, slap_sig_wake );
2356 }
2357
2358
2359 void slapd_add_internal(ber_socket_t s, int isactive) {
2360         slapd_add(s, isactive, NULL);
2361 }
2362
2363 Listener ** slapd_get_listeners(void) {
2364         return slap_listeners;
2365 }
2366
2367 void slap_wake_listener() {
2368         WAKE_LISTENER(1);
2369 }