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

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