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