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_SOCK_SET_DESTROY do { \
 239         if ( slap_daemon.sd_epolls != NULL ) { \
 240                 ch_free( slap_daemon.sd_epolls ); \
 241                 slap_daemon.sd_epolls = NULL; \
 242                 ch_free( slap_daemon.sd_index ); \
 243                 slap_daemon.sd_index = NULL; \
 244                 close( slap_daemon.sd_epfd ); \
 245         } \
 246 } while ( 0 )
 247
 248 # define SLAP_EVENT_DECL struct epoll_event *revents
 249
 250 # define SLAP_EVENT_INIT do { \
 251         revents = slap_daemon.sd_epolls + dtblsize; \
 252 } while (0)
 253
 254 # define SLAP_EVENT_WAIT(tvp) \
 255         epoll_wait( slap_daemon.sd_epfd, revents, \
 256                 dtblsize, (tvp) ? (tvp)->tv_sec * 1000 : -1 )
 257
 258 #else
 259 /* select */
 260
 261 # define SLAP_EVENTS_ARE_INDEXED 1
 262 # define SLAP_EVENT_DECL        \
 263         fd_set readfds, writefds
 264
 265 # define SLAP_EVENT_INIT do { \
 266         AC_MEMCPY( &readfds, &slap_daemon.sd_readers, sizeof(fd_set) ); \
 267         if ( nwriters ) { \
 268                 AC_MEMCPY( &writefds, &slap_daemon.sd_writers, sizeof(fd_set) ); \
 269         } else { \
 270                 FD_ZERO( &writefds ); \
 271         } \
 272 } while (0)
 273
 274 # ifdef FD_SETSIZE
 275 #  define       CHK_SETSIZE do { \
 276         if (dtblsize > FD_SETSIZE) dtblsize = FD_SETSIZE; \
 277 } while (0)
 278 # else
 279 #  define        CHK_SETSIZE do { ; } while (0)
 280 # endif
 281
 282 # define        SLAP_SOCK_SET_INIT do { \
 283         CHK_SETSIZE; \
 284         FD_ZERO(&slap_daemon.sd_readers); \
 285         FD_ZERO(&slap_daemon.sd_writers); \
 286 } while (0)
 287
 288 #define         SLAP_SOCK_SET_DESTROY
 289
 290 # define SLAP_SOCK_IS_ACTIVE(fd)        FD_ISSET((fd), &slap_daemon.sd_actives)
 291 # define SLAP_SOCK_IS_READ(fd)          FD_ISSET((fd), &slap_daemon.sd_readers)
 292 # define SLAP_SOCK_IS_WRITE(fd)         FD_ISSET((fd), &slap_daemon.sd_writers)
 293
 294 # define SLAP_SOCK_NOT_ACTIVE(fd)       (!SLAP_SOCK_IS_ACTIVE(fd) && \
 295          !SLAP_SOCK_IS_READ(fd) && !SLAP_SOCK_IS_WRITE(fd))
 296
 297 # ifdef HAVE_WINSOCK
 298 #  define SLAP_SOCK_SET_READ(fd)        do { \
 299         if (!SLAP_SOCK_IS_READ(fd)) { FD_SET((fd), &slap_daemon.sd_readers); } \
 300 } while(0)
 301 #  define SLAP_SOCK_SET_WRITE(fd)       do { \
 302         if (!SLAP_SOCK_IS_WRITE(fd)) { FD_SET((fd), &slap_daemon.sd_writers); } \
 303 } while(0)
 304
 305 #  define SLAP_ADDTEST(s)
 306 #  define SLAP_EVENT_MAX        dtblsize
 307 # else
 308 #  define SLAP_SOCK_SET_READ(fd)        FD_SET((fd), &slap_daemon.sd_readers)
 309 #  define SLAP_SOCK_SET_WRITE(fd)       FD_SET((fd), &slap_daemon.sd_writers)
 310
 311 #  define SLAP_EVENT_MAX        slap_daemon.sd_nfds
 312 #  define SLAP_ADDTEST(s)       do { \
 313         if ((s) >= slap_daemon.sd_nfds) slap_daemon.sd_nfds = (s)+1; \
 314 } while (0)
 315 # endif
 316
 317 # define SLAP_SOCK_CLR_READ(fd)         FD_CLR((fd), &slap_daemon.sd_readers)
 318 # define SLAP_SOCK_CLR_WRITE(fd)        FD_CLR((fd), &slap_daemon.sd_writers)
 319
 320 # define SLAP_ADD_SOCK(s, l) do { \
 321         SLAP_ADDTEST((s)); \
 322         FD_SET((s), &slap_daemon.sd_actives); \
 323         FD_SET((s), &slap_daemon.sd_readers); \
 324 } while(0)
 325
 326 # define SLAP_DEL_SOCK(s) do { \
 327         FD_CLR((s), &slap_daemon.sd_actives); \
 328         FD_CLR((s), &slap_daemon.sd_readers); \
 329         FD_CLR((s), &slap_daemon.sd_writers); \
 330 } while(0)
 331
 332 # define SLAP_EVENT_IS_READ(fd)         FD_ISSET((fd), &readfds)
 333 # define SLAP_EVENT_IS_WRITE(fd)        FD_ISSET((fd), &writefds)
 334
 335 # define SLAP_EVENT_CLR_READ(fd)        FD_CLR((fd), &readfds)
 336 # define SLAP_EVENT_CLR_WRITE(fd)       FD_CLR((fd), &writefds)
 337
 338 # define SLAP_EVENT_WAIT(tvp) \
 339         select( SLAP_EVENT_MAX, &readfds, \
 340                 nwriters > 0 ? &writefds : NULL, NULL, (tvp) )
 341 #endif
 342
 343 #ifdef HAVE_SLP
 344 /*
 345  * SLP related functions
 346  */
 347 #include <slp.h>
 348
 349 #define LDAP_SRVTYPE_PREFIX "service:ldap://"
 350 #define LDAPS_SRVTYPE_PREFIX "service:ldaps://"
 351 static char** slapd_srvurls = NULL;
 352 static SLPHandle slapd_hslp = 0;
 353 int slapd_register_slp = 0;
 354 const char *slapd_slp_attrs = NULL;
 355
 356 static SLPError slapd_slp_cookie;
 357
 358 void slapd_slp_init( const char* urls ) {
 359         int i;
 360         SLPError err;
 361
 362         slapd_srvurls = ldap_str2charray( urls, " " );
 363
 364         if( slapd_srvurls == NULL ) return;
 365
 366         /* find and expand INADDR_ANY URLs */
 367         for( i=0; slapd_srvurls[i] != NULL; i++ ) {
 368                 if( strcmp( slapd_srvurls[i], "ldap:///" ) == 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( LDAP_SRVTYPE_PREFIX ) );
 374                                 strcpy( lutil_strcopy(slapd_srvurls[i],
 375                                         LDAP_SRVTYPE_PREFIX ), host );
 376
 377                                 ch_free( host );
 378                         }
 379
 380                 } else if ( strcmp( slapd_srvurls[i], "ldaps:///" ) == 0) {
 381                         char *host = ldap_pvt_get_fqdn( NULL );
 382                         if ( host != NULL ) {
 383                                 slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i],
 384                                         strlen( host ) +
 385                                         sizeof( LDAPS_SRVTYPE_PREFIX ) );
 386                                 strcpy( lutil_strcopy(slapd_srvurls[i],
 387                                         LDAPS_SRVTYPE_PREFIX ), host );
 388
 389                                 ch_free( host );
 390                         }
 391                 }
 392         }
 393
 394         /* open the SLP handle */
 395         err = SLPOpen( "en", 0, &slapd_hslp );
 396
 397         if (err != SLP_OK) {
 398                 Debug( LDAP_DEBUG_CONNS, "daemon: SLPOpen() failed with %ld\n",
 399                         (long)err, 0, 0 );
 400         }
 401 }
 402
 403 void slapd_slp_deinit() {
 404         if( slapd_srvurls == NULL ) return;
 405
 406         ldap_charray_free( slapd_srvurls );
 407         slapd_srvurls = NULL;
 408
 409         /* close the SLP handle */
 410         SLPClose( slapd_hslp );
 411 }
 412
 413 void slapd_slp_regreport(
 414         SLPHandle hslp,
 415         SLPError errcode,
 416         void* cookie )
 417 {
 418         /* return the error code in the cookie */
 419         *(SLPError*)cookie = errcode;
 420 }
 421
 422 void slapd_slp_reg() {
 423         int i;
 424         SLPError err;
 425
 426         if( slapd_srvurls == NULL ) return;
 427
 428         for( i=0; slapd_srvurls[i] != NULL; i++ ) {
 429                 if( strncmp( slapd_srvurls[i], LDAP_SRVTYPE_PREFIX,
 430                                 sizeof( LDAP_SRVTYPE_PREFIX ) - 1 ) == 0 ||
 431                     strncmp( slapd_srvurls[i], LDAPS_SRVTYPE_PREFIX,
 432                                 sizeof( LDAPS_SRVTYPE_PREFIX ) - 1 ) == 0 )
 433                 {
 434                         err = SLPReg( slapd_hslp,
 435                                 slapd_srvurls[i],
 436                                 SLP_LIFETIME_MAXIMUM,
 437                                 "ldap",
 438                                         (slapd_slp_attrs) ? slapd_slp_attrs : "",
 439                                         SLP_TRUE,
 440                                 slapd_slp_regreport,
 441                                         &slapd_slp_cookie );
 442
 443                         if (err != SLP_OK || slapd_slp_cookie != SLP_OK) {
 444                                 Debug( LDAP_DEBUG_CONNS,
 445                                         "daemon: SLPReg(%s) failed with %ld, cookie = %ld\n",
 446                                         slapd_srvurls[i], (long)err, (long)slapd_slp_cookie );
 447                         }
 448                 }
 449         }
 450 }
 451
 452 void slapd_slp_dereg() {
 453         int i;
 454         SLPError err;
 455
 456         if( slapd_srvurls == NULL ) return;
 457
 458         for( i=0; slapd_srvurls[i] != NULL; i++ ) {
 459                 err = SLPDereg( slapd_hslp,
 460                         slapd_srvurls[i],
 461                         slapd_slp_regreport,
 462                                 &slapd_slp_cookie );
 463
 464                 if (err != SLP_OK || slapd_slp_cookie != SLP_OK) {
 465                         Debug( LDAP_DEBUG_CONNS,
 466                                 "daemon: SLPDereg(%s) failed with %ld, cookie = %ld\n",
 467                                 slapd_srvurls[i], (long)err, (long)slapd_slp_cookie );
 468                 }
 469         }
 470 }
 471 #endif /* HAVE_SLP */
 472
 473 /*
 474  * Add a descriptor to daemon control
 475  *
 476  * If isactive, the descriptor is a live server session and is subject
 477  * to idletimeout control. Otherwise, the descriptor is a passive
 478  * listener or an outbound client session, and not subject to
 479  * idletimeout. The underlying event handler may record the Listener
 480  * argument to differentiate Listener's from real sessions.
 481  */
 482 static void slapd_add(ber_socket_t s, int isactive, Listener *sl) {
 483         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 484
 485         assert( SLAP_SOCK_NOT_ACTIVE(s) );
 486
 487         if ( isactive ) slap_daemon.sd_nactives++;
 488
 489         SLAP_ADD_SOCK(s, sl);
 490
 491         Debug( LDAP_DEBUG_CONNS, "daemon: added %ldr\n",
 492                 (long) s, 0, 0 );
 493
 494         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 495
 496 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 497         WAKE_LISTENER(1);
 498 #endif
 499 }
 500
 501 void slapd_sd_lock()
 502 {
 503         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 504 }
 505
 506 void slapd_sd_unlock()
 507 {
 508         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 509 }
 510
 511 /*
 512  * Remove the descriptor from daemon control
 513  */
 514 void slapd_remove(
 515         ber_socket_t s,
 516         Sockbuf *sb,
 517         int wasactive,
 518         int wake,
 519         int locked )
 520 {
 521         int waswriter;
 522         int wasreader;
 523
 524         if ( !locked )
 525                 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 526
 527         assert( SLAP_SOCK_IS_ACTIVE( s ));
 528
 529         if ( wasactive ) slap_daemon.sd_nactives--;
 530
 531         waswriter = SLAP_SOCK_IS_WRITE(s);
 532         wasreader = SLAP_SOCK_IS_READ(s);
 533
 534         Debug( LDAP_DEBUG_CONNS, "daemon: removing %ld%s%s\n",
 535                 (long) s,
 536                 wasreader ? "r" : "",
 537                 waswriter ? "w" : "" );
 538
 539         if ( waswriter ) slap_daemon.sd_nwriters--;
 540
 541         SLAP_DEL_SOCK(s);
 542
 543         if ( sb )
 544                 ber_sockbuf_free(sb);
 545
 546         /* If we ran out of file descriptors, we dropped a listener from
 547          * the select() loop. Now that we're removing a session from our
 548          * control, we can try to resume a dropped listener to use.
 549          */
 550         if ( emfile ) {
 551                 int i;
 552                 for ( i = 0; slap_listeners[i] != NULL; i++ ) {
 553                         Listener *lr = slap_listeners[i];
 554
 555                         if ( lr->sl_sd == AC_SOCKET_INVALID ) continue;
 556                         if ( lr->sl_sd == s ) continue;
 557                         if ( lr->sl_mute ) {
 558                                 lr->sl_mute = 0;
 559                                 emfile--;
 560                                 break;
 561                         }
 562                 }
 563                 /* Walked the entire list without enabling anything; emfile
 564                  * counter is stale. Reset it.
 565                  */
 566                 if ( slap_listeners[i] == NULL ) emfile = 0;
 567         }
 568         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 569         WAKE_LISTENER(wake || slapd_gentle_shutdown == 2);
 570 }
 571
 572 void slapd_clr_write(ber_socket_t s, int wake) {
 573         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 574
 575         assert( SLAP_SOCK_IS_ACTIVE( s ));
 576
 577         if ( SLAP_SOCK_IS_WRITE( s )) {
 578                 SLAP_SOCK_CLR_WRITE( s );
 579                 slap_daemon.sd_nwriters--;
 580         }
 581
 582         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 583         WAKE_LISTENER(wake);
 584 }
 585
 586 void slapd_set_write(ber_socket_t s, int wake) {
 587         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 588
 589         assert( SLAP_SOCK_IS_ACTIVE( s ));
 590
 591         if ( !SLAP_SOCK_IS_WRITE( s )) {
 592                 SLAP_SOCK_SET_WRITE( s );
 593                 slap_daemon.sd_nwriters++;
 594         }
 595
 596         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 597         WAKE_LISTENER(wake);
 598 }
 599
 600 int slapd_clr_read(ber_socket_t s, int wake) {
 601         int rc = 1;
 602         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 603
 604         if ( SLAP_SOCK_IS_ACTIVE( s )) {
 605                 SLAP_SOCK_CLR_READ( s );
 606                 rc = 0;
 607         }
 608         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 609         if ( !rc )
 610                 WAKE_LISTENER(wake);
 611         return rc;
 612 }
 613
 614 void slapd_set_read(ber_socket_t s, int wake) {
 615         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 616
 617         assert( SLAP_SOCK_IS_ACTIVE( s ));
 618         if (!SLAP_SOCK_IS_READ( s )) SLAP_SOCK_SET_READ( s );
 619
 620         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 621         WAKE_LISTENER(wake);
 622 }
 623
 624 static void slapd_close(ber_socket_t s) {
 625         Debug( LDAP_DEBUG_CONNS, "daemon: closing %ld\n",
 626                 (long) s, 0, 0 );
 627         tcp_close(s);
 628 }
 629
 630 static void slap_free_listener_addresses(struct sockaddr **sal) {
 631         struct sockaddr **sap;
 632         if (sal == NULL) return;
 633         for (sap = sal; *sap != NULL; sap++) ch_free(*sap);
 634         ch_free(sal);
 635 }
 636
 637 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
 638 static int get_url_perms(
 639         char    **exts,
 640         mode_t  *perms,
 641         int     *crit )
 642 {
 643         int     i;
 644
 645         assert( exts != NULL );
 646         assert( perms != NULL );
 647         assert( crit != NULL );
 648
 649         *crit = 0;
 650         for ( i = 0; exts[ i ]; i++ ) {
 651                 char    *type = exts[ i ];
 652                 int     c = 0;
 653
 654                 if ( type[ 0 ] == '!' ) {
 655                         c = 1;
 656                         type++;
 657                 }
 658
 659                 if ( strncasecmp( type, LDAPI_MOD_URLEXT "=",
 660                         sizeof(LDAPI_MOD_URLEXT "=") - 1 ) == 0 )
 661                 {
 662                         char *value = type + ( sizeof(LDAPI_MOD_URLEXT "=") - 1 );
 663                         mode_t p = 0;
 664                         int j;
 665
 666                         switch (strlen(value)) {
 667                         case 4:
 668                                 /* skip leading '0' */
 669                                 if ( value[ 0 ] != '0' ) return LDAP_OTHER;
 670                                 value++;
 671
 672                         case 3:
 673                                 for ( j = 0; j < 3; j++) {
 674                                         int     v;
 675
 676                                         v = value[ j ] - '0';
 677
 678                                         if ( v < 0 || v > 7 ) return LDAP_OTHER;
 679
 680                                         p |= v << 3*(2-j);
 681                                 }
 682                                 break;
 683
 684                         case 10:
 685                                 for ( j = 1; j < 10; j++ ) {
 686                                         static mode_t   m[] = { 0,
 687                                                 S_IRUSR, S_IWUSR, S_IXUSR,
 688                                                 S_IRGRP, S_IWGRP, S_IXGRP,
 689                                                 S_IROTH, S_IWOTH, S_IXOTH
 690                                         };
 691                                         static char     c[] = "-rwxrwxrwx";
 692
 693                                         if ( value[ j ] == c[ j ] ) {
 694                                                 p |= m[ j ];
 695
 696                                         } else if ( value[ j ] != '-' ) {
 697                                                 return LDAP_OTHER;
 698                                         }
 699                                 }
 700                                 break;
 701
 702                         default:
 703                                 return LDAP_OTHER;
 704                         }
 705
 706                         *crit = c;
 707                         *perms = p;
 708
 709                         return LDAP_SUCCESS;
 710                 }
 711         }
 712
 713         return LDAP_OTHER;
 714 }
 715 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
 716
 717 /* port = 0 indicates AF_LOCAL */
 718 static int slap_get_listener_addresses(
 719         const char *host,
 720         unsigned short port,
 721         struct sockaddr ***sal)
 722 {
 723         struct sockaddr **sap;
 724
 725 #ifdef LDAP_PF_LOCAL
 726         if ( port == 0 ) {
 727                 *sal = ch_malloc(2 * sizeof(void *));
 728                 if (*sal == NULL) return -1;
 729
 730                 sap = *sal;
 731                 *sap = ch_malloc(sizeof(struct sockaddr_un));
 732                 if (*sap == NULL) goto errexit;
 733                 sap[1] = NULL;
 734
 735                 if ( strlen(host) >
 736                         (sizeof(((struct sockaddr_un *)*sap)->sun_path) - 1) )
 737                 {
 738                         Debug( LDAP_DEBUG_ANY,
 739                                 "daemon: domain socket path (%s) too long in URL",
 740                                 host, 0, 0);
 741                         goto errexit;
 742                 }
 743
 744                 (void)memset( (void *)*sap, '\0', sizeof(struct sockaddr_un) );
 745                 (*sap)->sa_family = AF_LOCAL;
 746                 strcpy( ((struct sockaddr_un *)*sap)->sun_path, host );
 747         } else
 748 #endif
 749         {
 750 #ifdef HAVE_GETADDRINFO
 751                 struct addrinfo hints, *res, *sai;
 752                 int n, err;
 753                 char serv[7];
 754
 755                 memset( &hints, '\0', sizeof(hints) );
 756                 hints.ai_flags = AI_PASSIVE;
 757                 hints.ai_socktype = SOCK_STREAM;
 758                 hints.ai_family = slap_inet4or6;
 759                 snprintf(serv, sizeof serv, "%d", port);
 760
 761                 if ( (err = getaddrinfo(host, serv, &hints, &res)) ) {
 762                         Debug( LDAP_DEBUG_ANY, "daemon: getaddrinfo() failed: %s\n",
 763                                 AC_GAI_STRERROR(err), 0, 0);
 764                         return -1;
 765                 }
 766
 767                 sai = res;
 768                 for (n=2; (sai = sai->ai_next) != NULL; n++) {
 769                         /* EMPTY */ ;
 770                 }
 771                 *sal = ch_calloc(n, sizeof(void *));
 772                 if (*sal == NULL) return -1;
 773
 774                 sap = *sal;
 775                 *sap = NULL;
 776
 777                 for ( sai=res; sai; sai=sai->ai_next ) {
 778                         if( sai->ai_addr == NULL ) {
 779                                 Debug( LDAP_DEBUG_ANY, "slap_get_listener_addresses: "
 780                                         "getaddrinfo ai_addr is NULL?\n", 0, 0, 0 );
 781                                 freeaddrinfo(res);
 782                                 goto errexit;
 783                         }
 784
 785                         switch (sai->ai_family) {
 786 #  ifdef LDAP_PF_INET6
 787                         case AF_INET6:
 788                                 *sap = ch_malloc(sizeof(struct sockaddr_in6));
 789                                 if (*sap == NULL) {
 790                                         freeaddrinfo(res);
 791                                         goto errexit;
 792                                 }
 793                                 *(struct sockaddr_in6 *)*sap =
 794                                         *((struct sockaddr_in6 *)sai->ai_addr);
 795                                 break;
 796 #  endif
 797                         case AF_INET:
 798                                 *sap = ch_malloc(sizeof(struct sockaddr_in));
 799                                 if (*sap == NULL) {
 800                                         freeaddrinfo(res);
 801                                         goto errexit;
 802                                 }
 803                                 *(struct sockaddr_in *)*sap =
 804                                         *((struct sockaddr_in *)sai->ai_addr);
 805                                 break;
 806                         default:
 807                                 *sap = NULL;
 808                                 break;
 809                         }
 810
 811                         if (*sap != NULL) {
 812                                 (*sap)->sa_family = sai->ai_family;
 813                                 sap++;
 814                                 *sap = NULL;
 815                         }
 816                 }
 817
 818                 freeaddrinfo(res);
 819
 820 #else
 821                 int i, n = 1;
 822                 struct in_addr in;
 823                 struct hostent *he = NULL;
 824
 825                 if ( host == NULL ) {
 826                         in.s_addr = htonl(INADDR_ANY);
 827
 828                 } else if ( !inet_aton( host, &in ) ) {
 829                         he = gethostbyname( host );
 830                         if( he == NULL ) {
 831                                 Debug( LDAP_DEBUG_ANY,
 832                                         "daemon: invalid host %s", host, 0, 0);
 833                                 return -1;
 834                         }
 835                         for (n = 0; he->h_addr_list[n]; n++) /* empty */;
 836                 }
 837
 838                 *sal = ch_malloc((n+1) * sizeof(void *));
 839                 if (*sal == NULL) return -1;
 840
 841                 sap = *sal;
 842                 for ( i = 0; i<n; i++ ) {
 843                         sap[i] = ch_malloc(sizeof(struct sockaddr_in));
 844                         if (*sap == NULL) goto errexit;
 845
 846                         (void)memset( (void *)sap[i], '\0', sizeof(struct sockaddr_in) );
 847                         sap[i]->sa_family = AF_INET;
 848                         ((struct sockaddr_in *)sap[i])->sin_port = htons(port);
 849                         AC_MEMCPY( &((struct sockaddr_in *)sap[i])->sin_addr,
 850                                 he ? (struct in_addr *)he->h_addr_list[i] : &in,
 851                                 sizeof(struct in_addr) );
 852                 }
 853                 sap[i] = NULL;
 854 #endif
 855         }
 856
 857         return 0;
 858
 859 errexit:
 860         slap_free_listener_addresses(*sal);
 861         return -1;
 862 }
 863
 864 static int slap_open_listener(
 865         const char* url,
 866         int *listeners,
 867         int *cur
 868         )
 869 {
 870         int     num, tmp, rc;
 871         Listener l;
 872         Listener *li;
 873         LDAPURLDesc *lud;
 874         unsigned short port;
 875         int err, addrlen = 0;
 876         struct sockaddr **sal, **psal;
 877         int socktype = SOCK_STREAM;     /* default to COTS */
 878
 879 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
 880         /*
 881          * use safe defaults
 882          */
 883         int     crit = 1;
 884 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
 885
 886         rc = ldap_url_parse( url, &lud );
 887
 888         if( rc != LDAP_URL_SUCCESS ) {
 889                 Debug( LDAP_DEBUG_ANY,
 890                         "daemon: listen URL \"%s\" parse error=%d\n",
 891                         url, rc, 0 );
 892                 return rc;
 893         }
 894
 895         l.sl_url.bv_val = NULL;
 896         l.sl_mute = 0;
 897 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 898         l.sl_busy = 0;
 899 #endif
 900
 901 #ifndef HAVE_TLS
 902         if( ldap_pvt_url_scheme2tls( lud->lud_scheme ) ) {
 903                 Debug( LDAP_DEBUG_ANY, "daemon: TLS not supported (%s)\n",
 904                         url, 0, 0 );
 905                 ldap_free_urldesc( lud );
 906                 return -1;
 907         }
 908
 909         if(! lud->lud_port ) lud->lud_port = LDAP_PORT;
 910
 911 #else
 912         l.sl_is_tls = ldap_pvt_url_scheme2tls( lud->lud_scheme );
 913
 914         if(! lud->lud_port ) {
 915                 lud->lud_port = l.sl_is_tls ? LDAPS_PORT : LDAP_PORT;
 916         }
 917 #endif
 918
 919         port = (unsigned short) lud->lud_port;
 920
 921         tmp = ldap_pvt_url_scheme2proto(lud->lud_scheme);
 922         if ( tmp == LDAP_PROTO_IPC ) {
 923 #ifdef LDAP_PF_LOCAL
 924                 if ( lud->lud_host == NULL || lud->lud_host[0] == '\0' ) {
 925                         err = slap_get_listener_addresses(LDAPI_SOCK, 0, &sal);
 926                 } else {
 927                         err = slap_get_listener_addresses(lud->lud_host, 0, &sal);
 928                 }
 929 #else
 930
 931                 Debug( LDAP_DEBUG_ANY, "daemon: URL scheme not supported: %s",
 932                         url, 0, 0);
 933                 ldap_free_urldesc( lud );
 934                 return -1;
 935 #endif
 936         } else {
 937                 if( lud->lud_host == NULL || lud->lud_host[0] == '\0'
 938                         || strcmp(lud->lud_host, "*") == 0 )
 939                 {
 940                         err = slap_get_listener_addresses(NULL, port, &sal);
 941                 } else {
 942                         err = slap_get_listener_addresses(lud->lud_host, port, &sal);
 943                 }
 944         }
 945
 946 #ifdef LDAP_CONNECTIONLESS
 947         l.sl_is_udp = ( tmp == LDAP_PROTO_UDP );
 948 #endif
 949
 950 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
 951         if ( lud->lud_exts ) {
 952                 err = get_url_perms( lud->lud_exts, &l.sl_perms, &crit );
 953         } else {
 954                 l.sl_perms = S_IRWXU | S_IRWXO;
 955         }
 956 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
 957
 958         ldap_free_urldesc( lud );
 959         if ( err ) return -1;
 960
 961         /* If we got more than one address returned, we need to make space
 962          * for it in the slap_listeners array.
 963          */
 964         for ( num=0; sal[num]; num++ ) /* empty */;
 965         if ( num > 1 ) {
 966                 *listeners += num-1;
 967                 slap_listeners = ch_realloc( slap_listeners,
 968                         (*listeners + 1) * sizeof(Listener *) );
 969         }
 970
 971         psal = sal;
 972         while ( *sal != NULL ) {
 973                 char *af;
 974                 switch( (*sal)->sa_family ) {
 975                 case AF_INET:
 976                         af = "IPv4";
 977                         break;
 978 #ifdef LDAP_PF_INET6
 979                 case AF_INET6:
 980                         af = "IPv6";
 981                         break;
 982 #endif
 983 #ifdef LDAP_PF_LOCAL
 984                 case AF_LOCAL:
 985                         af = "Local";
 986                         break;
 987 #endif
 988                 default:
 989                         sal++;
 990                         continue;
 991                 }
 992
 993 #ifdef LDAP_CONNECTIONLESS
 994                 if( l.sl_is_udp ) socktype = SOCK_DGRAM;
 995 #endif
 996
 997                 l.sl_sd = socket( (*sal)->sa_family, socktype, 0);
 998                 if ( l.sl_sd == AC_SOCKET_INVALID ) {
 999                         int err = sock_errno();
1000                         Debug( LDAP_DEBUG_ANY,
1001                                 "daemon: %s socket() failed errno=%d (%s)\n",
1002                                 af, err, sock_errstr(err) );
1003                         sal++;
1004                         continue;
1005                 }
1006
1007 #ifndef HAVE_WINSOCK
1008                 if ( l.sl_sd >= dtblsize ) {
1009                         Debug( LDAP_DEBUG_ANY,
1010                                 "daemon: listener descriptor %ld is too great %ld\n",
1011                                 (long) l.sl_sd, (long) dtblsize, 0 );
1012                         tcp_close( l.sl_sd );
1013                         sal++;
1014                         continue;
1015                 }
1016 #endif
1017
1018 #ifdef LDAP_PF_LOCAL
1019                 if ( (*sal)->sa_family == AF_LOCAL ) {
1020                         unlink( ((struct sockaddr_un *)*sal)->sun_path );
1021                 } else
1022 #endif
1023                 {
1024 #ifdef SO_REUSEADDR
1025                         /* enable address reuse */
1026                         tmp = 1;
1027                         rc = setsockopt( l.sl_sd, SOL_SOCKET, SO_REUSEADDR,
1028                                 (char *) &tmp, sizeof(tmp) );
1029                         if ( rc == AC_SOCKET_ERROR ) {
1030                                 int err = sock_errno();
1031                                 Debug( LDAP_DEBUG_ANY, "slapd(%ld): "
1032                                         "setsockopt(SO_REUSEADDR) failed errno=%d (%s)\n",
1033                                         (long) l.sl_sd, err, sock_errstr(err) );
1034                         }
1035 #endif
1036                 }
1037
1038                 switch( (*sal)->sa_family ) {
1039                 case AF_INET:
1040                         addrlen = sizeof(struct sockaddr_in);
1041                         break;
1042 #ifdef LDAP_PF_INET6
1043                 case AF_INET6:
1044 #ifdef IPV6_V6ONLY
1045                         /* Try to use IPv6 sockets for IPv6 only */
1046                         tmp = 1;
1047                         rc = setsockopt( l.sl_sd, IPPROTO_IPV6, IPV6_V6ONLY,
1048                                 (char *) &tmp, sizeof(tmp) );
1049                         if ( rc == AC_SOCKET_ERROR ) {
1050                                 int err = sock_errno();
1051                                 Debug( LDAP_DEBUG_ANY, "slapd(%ld): "
1052                                         "setsockopt(IPV6_V6ONLY) failed errno=%d (%s)\n",
1053                                         (long) l.sl_sd, err, sock_errstr(err) );
1054                         }
1055 #endif
1056                         addrlen = sizeof(struct sockaddr_in6);
1057                         break;
1058 #endif
1059
1060 #ifdef LDAP_PF_LOCAL
1061                 case AF_LOCAL:
1062 #ifdef LOCAL_CREDS
1063                 {
1064                         int one = 1;
1065                         setsockopt(l.sl_sd, 0, LOCAL_CREDS, &one, sizeof one);
1066                 }
1067 #endif
1068                 addrlen = sizeof(struct sockaddr_un);
1069                 break;
1070 #endif
1071                 }
1072
1073                 if (bind(l.sl_sd, *sal, addrlen)) {
1074                         err = sock_errno();
1075                         Debug( LDAP_DEBUG_ANY,
1076                                 "daemon: bind(%ld) failed errno=%d (%s)\n",
1077                                 (long) l.sl_sd, err, sock_errstr(err) );
1078                         tcp_close( l.sl_sd );
1079                         sal++;
1080                         continue;
1081                 }
1082
1083                 switch ( (*sal)->sa_family ) {
1084 #ifdef LDAP_PF_LOCAL
1085                 case AF_LOCAL: {
1086                         char *addr = ((struct sockaddr_un *)*sal)->sun_path;
1087                         l.sl_name.bv_len = strlen(addr) + sizeof("PATH=") - 1;
1088                         l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len + 1 );
1089                         snprintf( l.sl_name.bv_val, l.sl_name.bv_len + 1,
1090                                 "PATH=%s", addr );
1091                 } break;
1092 #endif /* LDAP_PF_LOCAL */
1093
1094                 case AF_INET: {
1095                         char *s;
1096 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
1097                         char addr[INET_ADDRSTRLEN];
1098                         inet_ntop( AF_INET, &((struct sockaddr_in *)*sal)->sin_addr,
1099                                 addr, sizeof(addr) );
1100                         s = addr;
1101 #else
1102                         s = inet_ntoa( ((struct sockaddr_in *) *sal)->sin_addr );
1103 #endif
1104                         port = ntohs( ((struct sockaddr_in *)*sal) ->sin_port );
1105                         l.sl_name.bv_val =
1106                                 ber_memalloc( sizeof("IP=255.255.255.255:65535") );
1107                         snprintf( l.sl_name.bv_val, sizeof("IP=255.255.255.255:65535"),
1108                                 "IP=%s:%d",
1109                                  s != NULL ? s : SLAP_STRING_UNKNOWN, port );
1110                         l.sl_name.bv_len = strlen( l.sl_name.bv_val );
1111                 } break;
1112
1113 #ifdef LDAP_PF_INET6
1114                 case AF_INET6: {
1115                         char addr[INET6_ADDRSTRLEN];
1116                         inet_ntop( AF_INET6, &((struct sockaddr_in6 *)*sal)->sin6_addr,
1117                                 addr, sizeof addr);
1118                         port = ntohs( ((struct sockaddr_in6 *)*sal)->sin6_port );
1119                         l.sl_name.bv_len = strlen(addr) + sizeof("IP= 65535");
1120                         l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len );
1121                         snprintf( l.sl_name.bv_val, l.sl_name.bv_len, "IP=%s %d",
1122                                 addr, port );
1123                         l.sl_name.bv_len = strlen( l.sl_name.bv_val );
1124                 } break;
1125 #endif /* LDAP_PF_INET6 */
1126
1127                 default:
1128                         Debug( LDAP_DEBUG_ANY, "daemon: unsupported address family (%d)\n",
1129                                 (int) (*sal)->sa_family, 0, 0 );
1130                         break;
1131                 }
1132
1133                 AC_MEMCPY(&l.sl_sa, *sal, addrlen);
1134                 ber_str2bv( url, 0, 1, &l.sl_url);
1135                 li = ch_malloc( sizeof( Listener ) );
1136                 *li = l;
1137                 slap_listeners[*cur] = li;
1138                 (*cur)++;
1139                 sal++;
1140         }
1141
1142         slap_free_listener_addresses(psal);
1143
1144         if ( l.sl_url.bv_val == NULL ) {
1145                 Debug( LDAP_DEBUG_TRACE,
1146                         "slap_open_listener: failed on %s\n", url, 0, 0 );
1147                 return -1;
1148         }
1149
1150         Debug( LDAP_DEBUG_TRACE, "daemon: listener initialized %s\n",
1151                 l.sl_url.bv_val, 0, 0 );
1152         return 0;
1153 }
1154
1155 static int sockinit(void);
1156 static int sockdestroy(void);
1157
1158 int slapd_daemon_init( const char *urls )
1159 {
1160         int i, j, n, rc;
1161         char **u;
1162
1163         Debug( LDAP_DEBUG_ARGS, "daemon_init: %s\n",
1164                 urls ? urls : "<null>", 0, 0 );
1165
1166         ldap_pvt_thread_mutex_init( &slap_daemon.sd_mutex );
1167 #ifdef HAVE_TCPD
1168         ldap_pvt_thread_mutex_init( &slap_daemon.tcpd_mutex );
1169 #endif
1170
1171         if( (rc = sockinit()) != 0 ) return rc;
1172
1173 #ifdef HAVE_SYSCONF
1174         dtblsize = sysconf( _SC_OPEN_MAX );
1175 #elif HAVE_GETDTABLESIZE
1176         dtblsize = getdtablesize();
1177 #else
1178         dtblsize = FD_SETSIZE;
1179 #endif
1180
1181         /* open a pipe (or something equivalent connected to itself).
1182          * we write a byte on this fd whenever we catch a signal. The main
1183          * loop will be select'ing on this socket, and will wake up when
1184          * this byte arrives.
1185          */
1186         if( (rc = lutil_pair( wake_sds )) < 0 ) {
1187                 Debug( LDAP_DEBUG_ANY,
1188                         "daemon: lutil_pair() failed rc=%d\n", rc, 0, 0 );
1189                 return rc;
1190         }
1191
1192         SLAP_SOCK_SET_INIT;
1193
1194         if( urls == NULL ) urls = "ldap:///";
1195
1196         u = ldap_str2charray( urls, " " );
1197
1198         if( u == NULL || u[0] == NULL ) {
1199                 Debug( LDAP_DEBUG_ANY, "daemon_init: no urls (%s) provided.\n",
1200                         urls, 0, 0 );
1201                 if ( u )
1202                         ldap_charray_free( u );
1203                 return -1;
1204         }
1205
1206         for( i=0; u[i] != NULL; i++ ) {
1207                 Debug( LDAP_DEBUG_TRACE, "daemon_init: listen on %s\n",
1208                         u[i], 0, 0 );
1209         }
1210
1211         if( i == 0 ) {
1212                 Debug( LDAP_DEBUG_ANY, "daemon_init: no listeners to open (%s)\n",
1213                         urls, 0, 0 );
1214                 ldap_charray_free( u );
1215                 return -1;
1216         }
1217
1218         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners to open...\n",
1219                 i, 0, 0 );
1220         slap_listeners = ch_malloc( (i+1)*sizeof(Listener *) );
1221
1222         for(n = 0, j = 0; u[n]; n++ ) {
1223                 if ( slap_open_listener( u[n], &i, &j ) ) {
1224                         ldap_charray_free( u );
1225                         return -1;
1226                 }
1227         }
1228         slap_listeners[j] = NULL;
1229
1230         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners opened\n",
1231                 i, 0, 0 );
1232
1233
1234 #ifdef HAVE_SLP
1235         if( slapd_register_slp ) {
1236                 slapd_slp_init( urls );
1237                 slapd_slp_reg();
1238         }
1239 #endif
1240
1241         ldap_charray_free( u );
1242
1243         return !i;
1244 }
1245
1246
1247 int
1248 slapd_daemon_destroy(void)
1249 {
1250         connections_destroy();
1251         tcp_close( wake_sds[1] );
1252         tcp_close( wake_sds[0] );
1253         sockdestroy();
1254
1255 #ifdef HAVE_SLP
1256         if( slapd_register_slp ) {
1257                 slapd_slp_dereg();
1258                 slapd_slp_deinit();
1259         }
1260 #endif
1261
1262 #ifdef HAVE_TCPD
1263         ldap_pvt_thread_mutex_destroy( &slap_daemon.tcpd_mutex );
1264 #endif
1265
1266         ldap_pvt_thread_mutex_destroy( &slap_daemon.sd_mutex );
1267         return 0;
1268 }
1269
1270
1271 static void
1272 close_listeners(
1273         int remove )
1274 {
1275         int l;
1276
1277         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1278                 Listener *lr = slap_listeners[l];
1279
1280                 if ( lr->sl_sd != AC_SOCKET_INVALID ) {
1281                         if ( remove ) slapd_remove( lr->sl_sd, NULL, 0, 0, 0 );
1282
1283 #ifdef LDAP_PF_LOCAL
1284                         if ( lr->sl_sa.sa_addr.sa_family == AF_LOCAL ) {
1285                                 unlink( lr->sl_sa.sa_un_addr.sun_path );
1286                         }
1287 #endif /* LDAP_PF_LOCAL */
1288
1289                         slapd_close( lr->sl_sd );
1290                 }
1291
1292                 if ( lr->sl_url.bv_val ) {
1293                         ber_memfree( lr->sl_url.bv_val );
1294                 }
1295
1296                 if ( lr->sl_name.bv_val ) {
1297                         ber_memfree( lr->sl_name.bv_val );
1298                 }
1299
1300                 free( lr );
1301                 slap_listeners[l] = NULL;
1302         }
1303 }
1304
1305 static int
1306 slap_listener(
1307         Listener *sl )
1308 {
1309         Sockaddr                from;
1310
1311         ber_socket_t s;
1312         socklen_t len = sizeof(from);
1313         long id;
1314         slap_ssf_t ssf = 0;
1315         struct berval authid = BER_BVNULL;
1316 #ifdef SLAPD_RLOOKUPS
1317         char hbuf[NI_MAXHOST];
1318 #endif
1319
1320         char    *dnsname = NULL;
1321         char    *peeraddr = NULL;
1322 #ifdef LDAP_PF_LOCAL
1323         char peername[MAXPATHLEN + sizeof("PATH=")];
1324 #elif defined(LDAP_PF_INET6)
1325         char peername[sizeof("IP=ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 65535")];
1326 #else
1327         char peername[sizeof("IP=255.255.255.255:65336")];
1328 #endif /* LDAP_PF_LOCAL */
1329
1330         peername[0] = '\0';
1331
1332 #ifdef LDAP_CONNECTIONLESS
1333         if ( sl->sl_is_udp ) return 1;
1334 #endif
1335
1336 #  ifdef LDAP_PF_LOCAL
1337         /* FIXME: apparently accept doesn't fill
1338          * the sun_path sun_path member */
1339         from.sa_un_addr.sun_path[0] = '\0';
1340 #  endif /* LDAP_PF_LOCAL */
1341
1342         s = accept( sl->sl_sd, (struct sockaddr *) &from, &len );
1343
1344 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1345         /* Resume the listener FD to allow concurrent-processing of
1346          * additional incoming connections.
1347          */
1348         sl->sl_busy = 0;
1349         WAKE_LISTENER(1);
1350 #endif
1351
1352         if ( s == AC_SOCKET_INVALID ) {
1353                 int err = sock_errno();
1354
1355                 if(
1356 #ifdef EMFILE
1357                     err == EMFILE ||
1358 #endif
1359 #ifdef ENFILE
1360                     err == ENFILE ||
1361 #endif
1362                     0 )
1363                 {
1364                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1365                         emfile++;
1366                         /* Stop listening until an existing session closes */
1367                         sl->sl_mute = 1;
1368                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1369                 }
1370
1371                 Debug( LDAP_DEBUG_ANY,
1372                         "daemon: accept(%ld) failed errno=%d (%s)\n",
1373                         (long) sl->sl_sd, err, sock_errstr(err) );
1374                 ldap_pvt_thread_yield();
1375                 return 0;
1376         }
1377
1378 #ifndef HAVE_WINSOCK
1379         /* make sure descriptor number isn't too great */
1380         if ( s >= dtblsize ) {
1381                 Debug( LDAP_DEBUG_ANY,
1382                         "daemon: %ld beyond descriptor table size %ld\n",
1383                         (long) s, (long) dtblsize, 0 );
1384
1385                 slapd_close(s);
1386                 ldap_pvt_thread_yield();
1387                 return 0;
1388         }
1389 #endif
1390
1391 #ifdef LDAP_DEBUG
1392         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1393         /* newly accepted stream should not be in any of the FD SETS */
1394         assert( SLAP_SOCK_NOT_ACTIVE( s ));
1395         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1396 #endif
1397
1398 #if defined( SO_KEEPALIVE ) || defined( TCP_NODELAY )
1399 #ifdef LDAP_PF_LOCAL
1400         /* for IPv4 and IPv6 sockets only */
1401         if ( from.sa_addr.sa_family != AF_LOCAL )
1402 #endif /* LDAP_PF_LOCAL */
1403         {
1404                 int rc;
1405                 int tmp;
1406 #ifdef SO_KEEPALIVE
1407                 /* enable keep alives */
1408                 tmp = 1;
1409                 rc = setsockopt( s, SOL_SOCKET, SO_KEEPALIVE,
1410                         (char *) &tmp, sizeof(tmp) );
1411                 if ( rc == AC_SOCKET_ERROR ) {
1412                         int err = sock_errno();
1413                         Debug( LDAP_DEBUG_ANY,
1414                                 "slapd(%ld): setsockopt(SO_KEEPALIVE) failed "
1415                                 "errno=%d (%s)\n", (long) s, err, sock_errstr(err) );
1416                 }
1417 #endif
1418 #ifdef TCP_NODELAY
1419                 /* enable no delay */
1420                 tmp = 1;
1421                 rc = setsockopt( s, IPPROTO_TCP, TCP_NODELAY,
1422                         (char *)&tmp, sizeof(tmp) );
1423                 if ( rc == AC_SOCKET_ERROR ) {
1424                         int err = sock_errno();
1425                         Debug( LDAP_DEBUG_ANY,
1426                                 "slapd(%ld): setsockopt(TCP_NODELAY) failed "
1427                                 "errno=%d (%s)\n", (long) s, err, sock_errstr(err) );
1428                 }
1429 #endif
1430         }
1431 #endif
1432
1433         Debug( LDAP_DEBUG_CONNS,
1434                 "daemon: listen=%ld, new connection on %ld\n",
1435                 (long) sl->sl_sd, (long) s, 0 );
1436
1437         switch ( from.sa_addr.sa_family ) {
1438 #  ifdef LDAP_PF_LOCAL
1439         case AF_LOCAL:
1440                 /* FIXME: apparently accept doesn't fill
1441                  * the sun_path sun_path member */
1442                 if ( from.sa_un_addr.sun_path[0] == '\0' ) {
1443                         AC_MEMCPY( from.sa_un_addr.sun_path,
1444                                         sl->sl_sa.sa_un_addr.sun_path,
1445                                         sizeof( from.sa_un_addr.sun_path ) );
1446                 }
1447
1448                 sprintf( peername, "PATH=%s", from.sa_un_addr.sun_path );
1449                 ssf = local_ssf;
1450                 {
1451                         uid_t uid;
1452                         gid_t gid;
1453
1454                         if( getpeereid( s, &uid, &gid ) == 0 ) {
1455                                 authid.bv_val = ch_malloc(
1456                                         STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
1457                                         "cn=peercred,cn=external,cn=auth" ) + 1 );
1458                                 authid.bv_len = sprintf( authid.bv_val,
1459                                         "gidNumber=%d+uidNumber=%d,"
1460                                         "cn=peercred,cn=external,cn=auth",
1461                                         (int) gid, (int) uid );
1462                                 assert( authid.bv_len <=
1463                                         STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
1464                                         "cn=peercred,cn=external,cn=auth" ) );
1465                         }
1466                 }
1467                 dnsname = "local";
1468                 break;
1469 #endif /* LDAP_PF_LOCAL */
1470
1471 #  ifdef LDAP_PF_INET6
1472         case AF_INET6:
1473         if ( IN6_IS_ADDR_V4MAPPED(&from.sa_in6_addr.sin6_addr) ) {
1474                 peeraddr = inet_ntoa( *((struct in_addr *)
1475                                         &from.sa_in6_addr.sin6_addr.s6_addr[12]) );
1476                 sprintf( peername, "IP=%s:%d",
1477                          peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1478                          (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
1479         } else {
1480                 char addr[INET6_ADDRSTRLEN];
1481
1482                 peeraddr = (char *) inet_ntop( AF_INET6,
1483                                       &from.sa_in6_addr.sin6_addr,
1484                                       addr, sizeof addr );
1485                 sprintf( peername, "IP=%s %d",
1486                          peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1487                          (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
1488         }
1489         break;
1490 #  endif /* LDAP_PF_INET6 */
1491
1492         case AF_INET:
1493         peeraddr = inet_ntoa( from.sa_in_addr.sin_addr );
1494         sprintf( peername, "IP=%s:%d",
1495                 peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1496                 (unsigned) ntohs( from.sa_in_addr.sin_port ) );
1497                 break;
1498
1499         default:
1500                 slapd_close(s);
1501                 return 0;
1502         }
1503
1504         if ( ( from.sa_addr.sa_family == AF_INET )
1505 #ifdef LDAP_PF_INET6
1506                 || ( from.sa_addr.sa_family == AF_INET6 )
1507 #endif
1508                 )
1509         {
1510                 dnsname = NULL;
1511 #ifdef SLAPD_RLOOKUPS
1512                 if ( use_reverse_lookup ) {
1513                         char *herr;
1514                         if (ldap_pvt_get_hname( (const struct sockaddr *)&from, len, hbuf,
1515                                 sizeof(hbuf), &herr ) == 0) {
1516                                 ldap_pvt_str2lower( hbuf );
1517                                 dnsname = hbuf;
1518                         }
1519                 }
1520 #endif /* SLAPD_RLOOKUPS */
1521
1522 #ifdef HAVE_TCPD
1523                 {
1524                         int rc;
1525                         ldap_pvt_thread_mutex_lock( &slap_daemon.tcpd_mutex );
1526                         rc = hosts_ctl("slapd",
1527                                 dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1528                                 peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1529                                 SLAP_STRING_UNKNOWN );
1530                         ldap_pvt_thread_mutex_unlock( &slap_daemon.tcpd_mutex );
1531                         if ( !rc ) {
1532                                 /* DENY ACCESS */
1533                                 Statslog( LDAP_DEBUG_STATS,
1534                                         "fd=%ld DENIED from %s (%s)\n",
1535                                         (long) s,
1536                                         dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1537                                         peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1538                                         0, 0 );
1539                                 slapd_close(s);
1540                                 return 0;
1541                         }
1542                 }
1543 #endif /* HAVE_TCPD */
1544         }
1545
1546         id = connection_init(s, sl,
1547                 dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1548                 peername,
1549 #ifdef HAVE_TLS
1550                 sl->sl_is_tls ? CONN_IS_TLS : 0,
1551 #else
1552                 0,
1553 #endif
1554                 ssf,
1555                 authid.bv_val ? &authid : NULL );
1556
1557         if( authid.bv_val ) ch_free(authid.bv_val);
1558
1559         if( id < 0 ) {
1560                 Debug( LDAP_DEBUG_ANY,
1561                         "daemon: connection_init(%ld, %s, %s) failed.\n",
1562                         (long) s, peername, sl->sl_name.bv_val );
1563                 slapd_close(s);
1564                 return 0;
1565         }
1566
1567         Statslog( LDAP_DEBUG_STATS,
1568                 "conn=%ld fd=%ld ACCEPT from %s (%s)\n",
1569                 id, (long) s, peername, sl->sl_name.bv_val,
1570                 0 );
1571
1572         return 0;
1573 }
1574
1575 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1576 static void*
1577 slap_listener_thread(
1578         void* ctx,
1579         void* ptr )
1580 {
1581         int rc;
1582
1583         rc = slap_listener( (Listener*)ptr );
1584
1585         if( rc != LDAP_SUCCESS ) {
1586                 Debug( LDAP_DEBUG_ANY,
1587                         "listener_thread: failed %d", rc, 0, 0 );
1588         }
1589
1590         return (void*)NULL;
1591 }
1592
1593 static int
1594 slap_listener_activate(
1595         Listener* sl )
1596 {
1597         int rc;
1598
1599         Debug( LDAP_DEBUG_TRACE, "slap_listener_activate(%d): %s\n",
1600                 sl->sl_sd, sl->sl_busy ? "busy" : "", 0 );
1601
1602         sl->sl_busy++;
1603
1604         rc = ldap_pvt_thread_pool_submit( &connection_pool,
1605                 slap_listener_thread, (void *) sl );
1606
1607         if( rc != 0 ) {
1608                 Debug( LDAP_DEBUG_ANY,
1609                         "listener_activate(%d): submit failed (%d)\n",
1610                         sl->sl_sd, rc, 0 );
1611         }
1612         return rc;
1613 }
1614 #endif
1615
1616 static void *
1617 slapd_daemon_task(
1618         void *ptr )
1619 {
1620         int l;
1621         time_t last_idle_check = 0;
1622         struct timeval idle;
1623         int ebadf = 0;
1624
1625 #define SLAPD_IDLE_CHECK_LIMIT 4
1626
1627         if ( global_idletimeout > 0 ) {
1628                 last_idle_check = slap_get_time();
1629                 /* Set the select timeout.
1630                  * Don't just truncate, preserve the fractions of
1631                  * seconds to prevent sleeping for zero time.
1632                  */
1633                 idle.tv_sec = global_idletimeout / SLAPD_IDLE_CHECK_LIMIT;
1634                 idle.tv_usec = global_idletimeout - \
1635                         ( idle.tv_sec * SLAPD_IDLE_CHECK_LIMIT );
1636                 idle.tv_usec *= 1000000 / SLAPD_IDLE_CHECK_LIMIT;
1637         } else {
1638                 idle.tv_sec = 0;
1639                 idle.tv_usec = 0;
1640         }
1641
1642         slapd_add( wake_sds[0], 0, NULL );
1643
1644         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1645                 if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) continue;
1646
1647 #ifdef LDAP_CONNECTIONLESS
1648                 /* Since this is connectionless, the data port is the
1649                  * listening port. The listen() and accept() calls
1650                  * are unnecessary.
1651                  */
1652                 if ( slap_listeners[l]->sl_is_udp )
1653                         continue;
1654 #endif
1655
1656                 if ( listen( slap_listeners[l]->sl_sd, SLAPD_LISTEN_BACKLOG ) == -1 ) {
1657                         int err = sock_errno();
1658
1659 #ifdef LDAP_PF_INET6
1660                         /* If error is EADDRINUSE, we are trying to listen to INADDR_ANY and
1661                          * we are already listening to in6addr_any, then we want to ignore
1662                          * this and continue.
1663                          */
1664                         if ( err == EADDRINUSE ) {
1665                                 int i;
1666                                 struct sockaddr_in sa = slap_listeners[l]->sl_sa.sa_in_addr;
1667                                 struct sockaddr_in6 sa6;
1668
1669                                 if ( sa.sin_family == AF_INET &&
1670                                      sa.sin_addr.s_addr == htonl(INADDR_ANY) ) {
1671                                         for ( i = 0 ; i < l; i++ ) {
1672                                                 sa6 = slap_listeners[i]->sl_sa.sa_in6_addr;
1673                                                 if ( sa6.sin6_family == AF_INET6 &&
1674                                                      !memcmp( &sa6.sin6_addr, &in6addr_any,
1675                                                                 sizeof(struct in6_addr) ) )
1676                                                 {
1677                                                         break;
1678                                                 }
1679                                         }
1680
1681                                         if ( i < l ) {
1682                                                 /* We are already listening to in6addr_any */
1683                                                 Debug( LDAP_DEBUG_CONNS,
1684                                                         "daemon: Attempt to listen to 0.0.0.0 failed, "
1685                                                         "already listening on ::, assuming IPv4 included\n",
1686                                                         0, 0, 0 );
1687                                                 slapd_close( slap_listeners[l]->sl_sd );
1688                                                 slap_listeners[l]->sl_sd = AC_SOCKET_INVALID;
1689                                                 continue;
1690                                         }
1691                                 }
1692                         }
1693 #endif
1694                         Debug( LDAP_DEBUG_ANY,
1695                                 "daemon: listen(%s, 5) failed errno=%d (%s)\n",
1696                                         slap_listeners[l]->sl_url.bv_val, err,
1697                                         sock_errstr(err) );
1698                         return (void*)-1;
1699                 }
1700
1701 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1702                 /* make the listening socket non-blocking */
1703                 if ( ber_pvt_socket_set_nonblock( slap_listeners[l]->sl_sd, 1 ) < 0 ) {
1704                         Debug( LDAP_DEBUG_ANY, "slapd_daemon_task: "
1705                                 "set nonblocking on a listening socket failed\n",
1706                                 0, 0, 0 );
1707                         slapd_shutdown = 2;
1708                         return (void*)-1;
1709                 }
1710 #endif
1711
1712                 slapd_add( slap_listeners[l]->sl_sd, 0, slap_listeners[l] );
1713         }
1714
1715 #ifdef HAVE_NT_SERVICE_MANAGER
1716         if ( started_event != NULL ) {
1717                 ldap_pvt_thread_cond_signal( &started_event );
1718         }
1719 #endif
1720
1721 #ifdef SLAP_SEM_LOAD_CONTROL
1722         /*
1723          * initialize count and lazyness of a semaphore
1724          */
1725         (void) ldap_lazy_sem_init(
1726                 SLAP_MAX_WORKER_THREADS + 4 /* max workers + margin */,
1727                 4 /* lazyness */ );
1728 #endif
1729
1730         /* initialization complete. Here comes the loop. */
1731
1732         while ( !slapd_shutdown ) {
1733                 ber_socket_t i;
1734                 int ns, nwriters;
1735                 int at;
1736                 ber_socket_t nfds;
1737 #if SLAP_EVENTS_ARE_INDEXED
1738                 ber_socket_t nrfds, nwfds;
1739 #endif
1740 #define SLAPD_EBADF_LIMIT 16
1741
1742                 time_t  now;
1743
1744                 SLAP_EVENT_DECL;
1745
1746                 struct timeval          tv;
1747                 struct timeval          *tvp;
1748
1749                 struct timeval          cat;
1750                 time_t                          tdelta = 1;
1751                 struct re_s*            rtask;
1752                 now = slap_get_time();
1753
1754                 if( ( global_idletimeout > 0 ) &&
1755                         difftime( last_idle_check +
1756                         global_idletimeout/SLAPD_IDLE_CHECK_LIMIT, now ) < 0 ) {
1757                         connections_timeout_idle( now );
1758                         last_idle_check = now;
1759                 }
1760                 tv = idle;
1761
1762 #ifdef SIGHUP
1763                 if( slapd_gentle_shutdown ) {
1764                         ber_socket_t active;
1765
1766                         if( slapd_gentle_shutdown == 1 ) {
1767                                 BackendDB *be;
1768                                 Debug( LDAP_DEBUG_ANY, "slapd gentle shutdown\n", 0, 0, 0 );
1769                                 close_listeners( 1 );
1770                                 frontendDB->be_restrictops |= SLAP_RESTRICT_OP_WRITES;
1771                                 LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
1772                                         be->be_restrictops |= SLAP_RESTRICT_OP_WRITES;
1773                                 }
1774                                 slapd_gentle_shutdown = 2;
1775                         }
1776
1777                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1778                         active = slap_daemon.sd_nactives;
1779                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1780                         if( active == 0 ) {
1781                                 slapd_shutdown = 1;
1782                                 break;
1783                         }
1784                 }
1785 #endif
1786                 at = 0;
1787
1788                 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1789
1790                 nwriters = slap_daemon.sd_nwriters;
1791
1792                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1793                         Listener *lr = slap_listeners[l];
1794
1795                         if ( lr->sl_sd == AC_SOCKET_INVALID ) continue;
1796
1797 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1798                         if ( lr->sl_mute || lr->sl_busy )
1799 #else
1800                         if ( lr->sl_mute )
1801 #endif
1802                         {
1803                             SLAP_SOCK_CLR_READ( lr->sl_sd );
1804                         } else {
1805                                 SLAP_SOCK_SET_READ( lr->sl_sd );
1806                         }
1807                 }
1808
1809                 SLAP_EVENT_INIT;
1810
1811                 nfds = SLAP_EVENT_MAX;
1812
1813                 if ( global_idletimeout && slap_daemon.sd_nactives ) at = 1;
1814
1815                 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1816
1817                 if ( at
1818 #if defined(HAVE_YIELDING_SELECT) || defined(NO_THREADS)
1819                         &&  ( tv.tv_sec || tv.tv_usec )
1820 #endif
1821                         )
1822                 {
1823                         tvp = &tv;
1824                 } else {
1825                         tvp = NULL;
1826                 }
1827
1828                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
1829                 rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
1830                 while ( rtask && cat.tv_sec && cat.tv_sec <= now ) {
1831                         if ( ldap_pvt_runqueue_isrunning( &slapd_rq, rtask )) {
1832                                 ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
1833                         } else {
1834                                 ldap_pvt_runqueue_runtask( &slapd_rq, rtask );
1835                                 ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
1836                                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
1837                                 ldap_pvt_thread_pool_submit( &connection_pool,
1838                                         rtask->routine, (void *) rtask );
1839                                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
1840                         }
1841                         rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
1842                 }
1843                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
1844
1845                 if ( rtask && cat.tv_sec ) {
1846                         time_t diff = difftime( cat.tv_sec, now );
1847                         if ( diff == 0 ) diff = tdelta;
1848                         if ( tvp == NULL || diff < tv.tv_sec ) {
1849                                 tv.tv_sec = diff;
1850                                 tv.tv_usec = 0;
1851                                 tvp = &tv;
1852                         }
1853                 }
1854
1855                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1856                         Listener *lr = slap_listeners[l];
1857
1858                         if ( lr->sl_sd == AC_SOCKET_INVALID ) {
1859                                 continue;
1860                         }
1861
1862                         if ( lr->sl_mute ) {
1863                                 Debug( LDAP_DEBUG_CONNS,
1864                                         "daemon: select: listen=%d muted\n",
1865                                         lr->sl_sd, 0, 0 );
1866                                 continue;
1867                         }
1868
1869 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1870                         if ( lr->sl_busy ) {
1871                                 Debug( LDAP_DEBUG_CONNS,
1872                                         "daemon: select: listen=%d busy\n",
1873                                         lr->sl_sd, 0, 0 );
1874                                 continue;
1875                         }
1876 #endif
1877
1878                         Debug( LDAP_DEBUG_CONNS,
1879                                 "daemon: select: listen=%d active_threads=%d tvp=%s\n",
1880                                 lr->sl_sd, at, tvp == NULL ? "NULL" : "zero" );
1881                 }
1882
1883                 switch(ns = SLAP_EVENT_WAIT(tvp)) {
1884                 case -1: {      /* failure - try again */
1885                                 int err = sock_errno();
1886
1887                                 if( err != EINTR ) {
1888                                         ebadf++;
1889
1890                                         /* Don't log unless we got it twice in a row */
1891                                         if ( !( ebadf & 1 )) {
1892                                                 Debug( LDAP_DEBUG_ANY,
1893                                                         "daemon: select failed count %d err (%d): %s\n",
1894                                                         ebadf, err, sock_errstr(err) );
1895                                         }
1896                                         if ( ebadf >= SLAPD_EBADF_LIMIT )
1897                                                 slapd_shutdown = 2;
1898                                 }
1899                         }
1900                         continue;
1901
1902                 case 0:         /* timeout - let threads run */
1903                         ebadf = 0;
1904 #ifndef HAVE_YIELDING_SELECT
1905                         Debug( LDAP_DEBUG_CONNS, "daemon: select timeout - yielding\n",
1906                             0, 0, 0 );
1907
1908                         ldap_pvt_thread_yield();
1909 #endif
1910                         continue;
1911
1912                 default:        /* something happened - deal with it */
1913                         if( slapd_shutdown ) continue;
1914
1915                         ebadf = 0;
1916                         Debug( LDAP_DEBUG_CONNS,
1917                                 "daemon: activity on %d descriptor%s\n",
1918                                 ns, ns != 1 ? "s" : "", 0 );
1919                         /* FALL THRU */
1920                 }
1921
1922 #if SLAP_EVENTS_ARE_INDEXED
1923                 if ( SLAP_EVENT_IS_READ( wake_sds[0] )) {
1924                         char c[BUFSIZ];
1925                         SLAP_EVENT_CLR_READ( wake_sds[0] );
1926                         waking = 0;
1927                         tcp_read( wake_sds[0], c, sizeof(c) );
1928                         Debug( LDAP_DEBUG_CONNS, "daemon: waked\n", 0, 0, 0 );
1929                         continue;
1930                 }
1931
1932                 /* The event slot equals the descriptor number - this is
1933                  * true for Unix select and poll. We treat Windows select
1934                  * like this too, even though it's a kludge.
1935                  */
1936                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1937                         int rc;
1938
1939                         if ( ns <= 0 ) break;
1940                         if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) continue;
1941 #ifdef LDAP_CONNECTIONLESS
1942                         if ( slap_listeners[l]->sl_is_udp ) continue;
1943 #endif
1944                         if ( !SLAP_EVENT_IS_READ( slap_listeners[l]->sl_sd )) continue;
1945
1946                         /* clear events */
1947                         SLAP_EVENT_CLR_READ( slap_listeners[l]->sl_sd );
1948                         SLAP_EVENT_CLR_WRITE( slap_listeners[l]->sl_sd );
1949                         ns--;
1950
1951 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1952                         rc = slap_listener_activate(slap_listeners[l]);
1953 #else
1954                         rc = slap_listener(slap_listeners[l]);
1955 #endif
1956                 }
1957
1958                 /* bypass the following tests if no descriptors left */
1959                 if ( ns <= 0 ) {
1960 #ifndef HAVE_YIELDING_SELECT
1961                         ldap_pvt_thread_yield();
1962 #endif
1963                         continue;
1964                 }
1965
1966                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
1967 #ifdef HAVE_WINSOCK
1968                 nrfds = readfds.fd_count;
1969                 nwfds = writefds.fd_count;
1970                 for ( i = 0; i < readfds.fd_count; i++ ) {
1971                         Debug( LDAP_DEBUG_CONNS, " %d%s",
1972                                 readfds.fd_array[i], "r", 0 );
1973                 }
1974                 for ( i = 0; i < writefds.fd_count; i++ ) {
1975                         Debug( LDAP_DEBUG_CONNS, " %d%s",
1976                                 writefds.fd_array[i], "w", 0 );
1977                 }
1978
1979 #else
1980                 nrfds = 0;
1981                 nwfds = 0;
1982                 for ( i = 0; i < nfds; i++ ) {
1983                         int     r, w;
1984
1985                         r = SLAP_EVENT_IS_READ( i );
1986                         /* writefds was not initialized if nwriters was zero */
1987                         w = nwriters ? SLAP_EVENT_IS_WRITE( i ) : 0;
1988                         if ( r || w ) {
1989                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", i,
1990                                     r ? "r" : "", w ? "w" : "" );
1991                                 if ( r ) {
1992                                         nrfds++;
1993                                         ns--;
1994                                 }
1995                                 if ( w ) {
1996                                         nwfds++;
1997                                         ns--;
1998                                 }
1999                         }
2000                         if ( ns <= 0 ) break;
2001                 }
2002 #endif
2003                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
2004
2005
2006                 /* loop through the writers */
2007                 for ( i = 0; nwfds > 0; i++ ) {
2008                         ber_socket_t wd;
2009 #ifdef HAVE_WINSOCK
2010                         wd = writefds.fd_array[i];
2011 #else
2012                         if( ! SLAP_EVENT_IS_WRITE( i ) ) continue;
2013                         wd = i;
2014 #endif
2015
2016                         SLAP_EVENT_CLR_WRITE( wd );
2017                         nwfds--;
2018
2019                         Debug( LDAP_DEBUG_CONNS,
2020                                 "daemon: write active on %d\n",
2021                                 wd, 0, 0 );
2022
2023                         /*
2024                          * NOTE: it is possible that the connection was closed
2025                          * and that the stream is now inactive.
2026                          * connection_write() must validate the stream is still
2027                          * active.
2028                          *
2029                          * ITS#4338: if the stream is invalid, there is no need to
2030                          * close it here. It has already been closed in connection.c.
2031                          */
2032                         if ( connection_write( wd ) < 0 ) {
2033                                 if ( SLAP_EVENT_IS_READ( wd )) {
2034                                         SLAP_EVENT_CLR_READ( (unsigned) wd );
2035                                         nrfds--;
2036                                 }
2037                         }
2038                 }
2039
2040                 for ( i = 0; nrfds > 0; i++ ) {
2041                         ber_socket_t rd;
2042 #ifdef HAVE_WINSOCK
2043                         rd = readfds.fd_array[i];
2044 #else
2045                         if( ! SLAP_EVENT_IS_READ( i ) ) continue;
2046                         rd = i;
2047 #endif
2048                         SLAP_EVENT_CLR_READ( rd );
2049                         nrfds--;
2050
2051                         Debug ( LDAP_DEBUG_CONNS,
2052                                 "daemon: read activity on %d\n", rd, 0, 0 );
2053                         /*
2054                          * NOTE: it is possible that the connection was closed
2055                          * and that the stream is now inactive.
2056                          * connection_read() must valid the stream is still
2057                          * active.
2058                          */
2059
2060 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2061                         connection_read_activate( rd );
2062 #else
2063                         connection_read( rd );
2064 #endif
2065                 }
2066 #else   /* !SLAP_EVENTS_ARE_INDEXED */
2067         /* FIXME */
2068         /* The events are returned in an arbitrary list. This is true
2069          * for /dev/poll, epoll and kqueue. In order to prioritize things
2070          * so that we can handle wake_sds first, listeners second, and then
2071          * all other connections last (as we do for select), we would need
2072          * to use multiple event handles and cascade them.
2073          *
2074          * That seems like a bit of hassle. So the wake_sds check has been
2075          * skipped. For epoll and kqueue we can associate arbitrary data with
2076          * an event, so we could use pointers to the listener structure
2077          * instead of just the file descriptor. For /dev/poll we have to
2078          * search the listeners array for a matching descriptor.
2079          *
2080          * We now handle wake events when we see them; they are not given
2081          * higher priority.
2082          */
2083 #ifdef LDAP_DEBUG
2084                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
2085
2086                 for (i=0; i<ns; i++) {
2087                         int     r, w;
2088
2089                         /* Don't log listener events */
2090                         if ( SLAP_EVENT_IS_LISTENER(i)
2091 #ifdef LDAP_CONNECTIONLESS
2092                                 && !((SLAP_EVENT_LISTENER(i))->sl_is_udp)
2093 #endif
2094                                 )
2095                         {
2096                                 continue;
2097                         }
2098
2099                         /* Don't log internal wake events */
2100                         if ( SLAP_EVENT_FD( i ) == wake_sds[0] ) continue;
2101
2102                         r = SLAP_EVENT_IS_READ( i );
2103                         w = SLAP_EVENT_IS_WRITE( i );
2104                         if ( r || w ) {
2105                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", SLAP_EVENT_FD(i),
2106                                     r ? "r" : "", w ? "w" : "" );
2107                         }
2108                 }
2109                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
2110 #endif
2111
2112                 for (i=0; i<ns; i++) {
2113                         int rc = 1, fd;
2114
2115                         if ( SLAP_EVENT_IS_LISTENER(i) ) {
2116 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2117                                 rc = slap_listener_activate( SLAP_EVENT_LISTENER( i ));
2118 #else
2119                                 rc = slap_listener( SLAP_EVENT_LISTENER( i ));
2120 #endif
2121                         }
2122
2123                         /* If we found a regular listener, rc is now zero, and we
2124                          * can skip the data portion. But if it was a UDP listener
2125                          * then rc is still 1, and we want to handle the data.
2126                          */
2127                         if ( rc ) {
2128                                 fd = SLAP_EVENT_FD( i );
2129
2130                                 /* Handle wake events */
2131                                 if ( fd == wake_sds[0] ) {
2132                                         char c[BUFSIZ];
2133                                         waking = 0;
2134                                         tcp_read( wake_sds[0], c, sizeof(c) );
2135                                         break;
2136                                 }
2137
2138                                 if( SLAP_EVENT_IS_WRITE( i ) ) {
2139                                         Debug( LDAP_DEBUG_CONNS,
2140                                                 "daemon: write active on %d\n",
2141                                                 fd, 0, 0 );
2142
2143                                         SLAP_EVENT_CLR_WRITE( i );
2144
2145                                         /*
2146                                          * NOTE: it is possible that the connection was closed
2147                                          * and that the stream is now inactive.
2148                                          * connection_write() must valid the stream is still
2149                                          * active.
2150                                          */
2151                                         if ( connection_write( fd ) < 0 ) {
2152                                                 continue;
2153                                         }
2154                                 }
2155                                 /* If event is a read */
2156                                 if( SLAP_EVENT_IS_READ( i )) {
2157                                         Debug( LDAP_DEBUG_CONNS,
2158                                                 "daemon: read active on %d\n",
2159                                                 fd, 0, 0 );
2160
2161                                         SLAP_EVENT_CLR_READ( i );
2162 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2163                                         connection_read_activate( fd );
2164 #else
2165                                         /*
2166                                          * NOTE: it is possible that the connection was closed
2167                                          * and that the stream is now inactive.
2168                                          * connection_read() must valid the stream is still
2169                                          * active.
2170                                          */
2171                                         connection_read( fd );
2172 #endif
2173                                 } else {
2174                                         Debug( LDAP_DEBUG_CONNS,
2175                                                 "daemon: hangup on %d\n", fd, 0, 0 );
2176                                 }
2177                         }
2178                 }
2179 #endif  /* SLAP_EVENTS_ARE_INDEXED */
2180
2181 #ifndef HAVE_YIELDING_SELECT
2182                 ldap_pvt_thread_yield();
2183 #endif
2184         }
2185
2186         if( slapd_shutdown == 1 ) {
2187                 Debug( LDAP_DEBUG_ANY,
2188                         "daemon: shutdown requested and initiated.\n",
2189                         0, 0, 0 );
2190
2191         } else if ( slapd_shutdown == 2 ) {
2192 #ifdef HAVE_NT_SERVICE_MANAGER
2193                         Debug( LDAP_DEBUG_ANY,
2194                                "daemon: shutdown initiated by Service Manager.\n",
2195                                0, 0, 0);
2196 #else /* !HAVE_NT_SERVICE_MANAGER */
2197                         Debug( LDAP_DEBUG_ANY,
2198                                "daemon: abnormal condition, shutdown initiated.\n",
2199                                0, 0, 0 );
2200 #endif /* !HAVE_NT_SERVICE_MANAGER */
2201         } else {
2202                 Debug( LDAP_DEBUG_ANY,
2203                        "daemon: no active streams, shutdown initiated.\n",
2204                        0, 0, 0 );
2205         }
2206
2207         if( slapd_gentle_shutdown != 2 ) close_listeners ( 0 );
2208
2209         if( !slapd_gentle_shutdown ) {
2210                 slapd_abrupt_shutdown = 1;
2211                 connections_shutdown();
2212         }
2213
2214         Debug( LDAP_DEBUG_ANY,
2215             "slapd shutdown: waiting for %d threads to terminate\n",
2216             ldap_pvt_thread_pool_backload(&connection_pool), 0, 0 );
2217         ldap_pvt_thread_pool_destroy(&connection_pool, 1);
2218
2219         free ( slap_listeners );
2220         slap_listeners = NULL;
2221
2222         return NULL;
2223 }
2224
2225
2226 #ifdef LDAP_CONNECTIONLESS
2227 static int connectionless_init(void)
2228 {
2229         int l;
2230
2231         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2232                 Listener *lr = slap_listeners[l];
2233                 long id;
2234
2235                 if( !lr->sl_is_udp ) {
2236                         continue;
2237                 }
2238
2239                 id = connection_init( lr->sl_sd, lr, "", "", CONN_IS_UDP, (slap_ssf_t) 0, NULL );
2240
2241                 if( id < 0 ) {
2242                         Debug( LDAP_DEBUG_TRACE,
2243                                 "connectionless_init: failed on %s (%d)\n", lr->sl_url, lr->sl_sd, 0 );
2244                         return -1;
2245                 }
2246                 lr->sl_is_udp++;
2247         }
2248
2249         return 0;
2250 }
2251 #endif /* LDAP_CONNECTIONLESS */
2252
2253 int slapd_daemon( void )
2254 {
2255         int rc;
2256
2257         connections_init();
2258 #ifdef LDAP_CONNECTIONLESS
2259         connectionless_init();
2260 #endif
2261
2262 #define SLAPD_LISTENER_THREAD 1
2263 #if defined( SLAPD_LISTENER_THREAD )
2264         {
2265                 ldap_pvt_thread_t       listener_tid;
2266
2267                 /* listener as a separate THREAD */
2268                 rc = ldap_pvt_thread_create( &listener_tid,
2269                         0, slapd_daemon_task, NULL );
2270
2271                 if ( rc != 0 ) {
2272                         Debug( LDAP_DEBUG_ANY,
2273                         "listener ldap_pvt_thread_create failed (%d)\n", rc, 0, 0 );
2274                         return rc;
2275                 }
2276
2277                 /* wait for the listener thread to complete */
2278                 ldap_pvt_thread_join( listener_tid, (void *) NULL );
2279         }
2280 #else
2281         /* experimental code */
2282         slapd_daemon_task( NULL );
2283 #endif
2284
2285         return 0;
2286
2287 }
2288
2289 static int sockinit(void)
2290 {
2291 #if defined( HAVE_WINSOCK2 )
2292     WORD wVersionRequested;
2293         WSADATA wsaData;
2294         int err;
2295
2296         wVersionRequested = MAKEWORD( 2, 0 );
2297
2298         err = WSAStartup( wVersionRequested, &wsaData );
2299         if ( err != 0 ) {
2300                 /* Tell the user that we couldn't find a usable */
2301                 /* WinSock DLL.                                  */
2302                 return -1;
2303         }
2304
2305         /* Confirm that the WinSock DLL supports 2.0.*/
2306         /* Note that if the DLL supports versions greater    */
2307         /* than 2.0 in addition to 2.0, it will still return */
2308         /* 2.0 in wVersion since that is the version we      */
2309         /* requested.                                        */
2310
2311         if ( LOBYTE( wsaData.wVersion ) != 2 ||
2312                 HIBYTE( wsaData.wVersion ) != 0 )
2313         {
2314             /* Tell the user that we couldn't find a usable */
2315             /* WinSock DLL.                                  */
2316             WSACleanup();
2317             return -1;
2318         }
2319
2320         /* The WinSock DLL is acceptable. Proceed. */
2321 #elif defined( HAVE_WINSOCK )
2322         WSADATA wsaData;
2323         if ( WSAStartup( 0x0101, &wsaData ) != 0 ) return -1;
2324 #endif
2325
2326         return 0;
2327 }
2328
2329 static int sockdestroy(void)
2330 {
2331 #if defined( HAVE_WINSOCK2 ) || defined( HAVE_WINSOCK )
2332         WSACleanup();
2333 #endif
2334         SLAP_SOCK_SET_DESTROY;
2335
2336         return 0;
2337 }
2338
2339 RETSIGTYPE
2340 slap_sig_shutdown( int sig )
2341 {
2342 #if 0
2343         Debug(LDAP_DEBUG_TRACE, "slap_sig_shutdown: signal %d\n", sig, 0, 0);
2344 #endif
2345
2346         /*
2347          * If the NT Service Manager is controlling the server, we don't
2348          * want SIGBREAK to kill the server. For some strange reason,
2349          * SIGBREAK is generated when a user logs out.
2350          */
2351
2352 #if HAVE_NT_SERVICE_MANAGER && SIGBREAK
2353         if (is_NT_Service && sig == SIGBREAK) {
2354                 /* empty */;
2355         } else
2356 #endif
2357 #ifdef SIGHUP
2358         if (sig == SIGHUP && global_gentlehup && slapd_gentle_shutdown == 0) {
2359                 slapd_gentle_shutdown = 1;
2360         } else
2361 #endif
2362         {
2363                 slapd_shutdown = 1;
2364         }
2365
2366         WAKE_LISTENER(1);
2367
2368         /* reinstall self */
2369         (void) SIGNAL_REINSTALL( sig, slap_sig_shutdown );
2370 }
2371
2372 RETSIGTYPE
2373 slap_sig_wake( int sig )
2374 {
2375         WAKE_LISTENER(1);
2376
2377         /* reinstall self */
2378         (void) SIGNAL_REINSTALL( sig, slap_sig_wake );
2379 }
2380
2381
2382 void slapd_add_internal(ber_socket_t s, int isactive) {
2383         slapd_add(s, isactive, NULL);
2384 }
2385
2386 Listener ** slapd_get_listeners(void) {
2387         return slap_listeners;
2388 }
2389
2390 void slap_wake_listener() {
2391         WAKE_LISTENER(1);
2392 }