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_calloc(1, 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 ( l.sl_is_tls && !slap_tls_ctx ) {
 840                 Debug( LDAP_DEBUG_ANY,
 841                         "daemon: TLS not configured (%s)\n",
 842                         url, 0, 0 );
 843                 ldap_free_urldesc( lud );
 844                 return -1;
 845         }
 846         if(! lud->lud_port ) {
 847                 lud->lud_port = l.sl_is_tls ? LDAPS_PORT : LDAP_PORT;
 848         }
 849 #endif
 850
 851         port = (unsigned short) lud->lud_port;
 852
 853         tmp = ldap_pvt_url_scheme2proto(lud->lud_scheme);
 854         if ( tmp == LDAP_PROTO_IPC ) {
 855 #ifdef LDAP_PF_LOCAL
 856                 if ( lud->lud_host == NULL || lud->lud_host[0] == '\0' ) {
 857                         err = slap_get_listener_addresses(LDAPI_SOCK, 0, &sal);
 858                 } else {
 859                         err = slap_get_listener_addresses(lud->lud_host, 0, &sal);
 860                 }
 861 #else
 862
 863                 Debug( LDAP_DEBUG_ANY, "daemon: URL scheme not supported: %s",
 864                         url, 0, 0);
 865                 ldap_free_urldesc( lud );
 866                 return -1;
 867 #endif
 868         } else {
 869                 if( lud->lud_host == NULL || lud->lud_host[0] == '\0'
 870                         || strcmp(lud->lud_host, "*") == 0 )
 871                 {
 872                         err = slap_get_listener_addresses(NULL, port, &sal);
 873                 } else {
 874                         err = slap_get_listener_addresses(lud->lud_host, port, &sal);
 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 ) {
 891                 return -1;
 892         }
 893
 894         /* If we got more than one address returned, we need to make space
 895          * for it in the slap_listeners array.
 896          */
 897         for ( num=0; sal[num]; num++ );
 898         if ( num > 1 ) {
 899                 *listeners += num-1;
 900                 slap_listeners = ch_realloc( slap_listeners, (*listeners + 1) * sizeof(Listener *) );
 901         }
 902
 903         psal = sal;
 904         while ( *sal != NULL ) {
 905                 char *af;
 906                 switch( (*sal)->sa_family ) {
 907                 case AF_INET:
 908                         af = "IPv4";
 909                         break;
 910 #ifdef LDAP_PF_INET6
 911                 case AF_INET6:
 912                         af = "IPv6";
 913                         break;
 914 #endif
 915 #ifdef LDAP_PF_LOCAL
 916                 case AF_LOCAL:
 917                         af = "Local";
 918                         break;
 919 #endif
 920                 default:
 921                         sal++;
 922                         continue;
 923                 }
 924 #ifdef LDAP_CONNECTIONLESS
 925                 if( l.sl_is_udp ) socktype = SOCK_DGRAM;
 926 #endif
 927                 l.sl_sd = socket( (*sal)->sa_family, socktype, 0);
 928                 if ( l.sl_sd == AC_SOCKET_INVALID ) {
 929                         int err = sock_errno();
 930                         Debug( LDAP_DEBUG_ANY,
 931                                 "daemon: %s socket() failed errno=%d (%s)\n",
 932                                 af, err, sock_errstr(err) );
 933                         sal++;
 934                         continue;
 935                 }
 936 #ifndef HAVE_WINSOCK
 937                 if ( l.sl_sd >= dtblsize ) {
 938                         Debug( LDAP_DEBUG_ANY,
 939                                 "daemon: listener descriptor %ld is too great %ld\n",
 940                                 (long) l.sl_sd, (long) dtblsize, 0 );
 941                         tcp_close( l.sl_sd );
 942                         sal++;
 943                         continue;
 944                 }
 945 #endif
 946 #ifdef LDAP_PF_LOCAL
 947                 if ( (*sal)->sa_family == AF_LOCAL ) {
 948                         unlink ( ((struct sockaddr_un *)*sal)->sun_path );
 949                 } else
 950 #endif
 951                 {
 952 #ifdef SO_REUSEADDR
 953                         /* enable address reuse */
 954                         tmp = 1;
 955                         rc = setsockopt( l.sl_sd, SOL_SOCKET, SO_REUSEADDR,
 956                                 (char *) &tmp, sizeof(tmp) );
 957                         if ( rc == AC_SOCKET_ERROR ) {
 958                                 int err = sock_errno();
 959                                 Debug( LDAP_DEBUG_ANY,
 960                                        "slapd(%ld): setsockopt(SO_REUSEADDR) failed errno=%d (%s)\n",
 961                                        (long) l.sl_sd, err, sock_errstr(err) );
 962                         }
 963 #endif
 964                 }
 965
 966                 switch( (*sal)->sa_family ) {
 967                 case AF_INET:
 968                         addrlen = sizeof(struct sockaddr_in);
 969                         break;
 970 #ifdef LDAP_PF_INET6
 971                 case AF_INET6:
 972 #ifdef IPV6_V6ONLY
 973                         /* Try to use IPv6 sockets for IPv6 only */
 974                         tmp = 1;
 975                         rc = setsockopt( l.sl_sd, IPPROTO_IPV6, IPV6_V6ONLY,
 976                                          (char *) &tmp, sizeof(tmp) );
 977                         if ( rc == AC_SOCKET_ERROR ) {
 978                                 int err = sock_errno();
 979                                 Debug( LDAP_DEBUG_ANY,
 980                                        "slapd(%ld): setsockopt(IPV6_V6ONLY) failed errno=%d (%s)\n",
 981                                        (long) l.sl_sd, err, sock_errstr(err) );
 982                         }
 983 #endif
 984                         addrlen = sizeof(struct sockaddr_in6);
 985                         break;
 986 #endif
 987 #ifdef LDAP_PF_LOCAL
 988                 case AF_LOCAL:
 989 #ifdef LOCAL_CREDS
 990                 {
 991                         int one = 1;
 992                         setsockopt(l.sl_sd, 0, LOCAL_CREDS, &one, sizeof one);
 993                 }
 994 #endif
 995                 addrlen = sizeof(struct sockaddr_un);
 996                 break;
 997 #endif
 998                 }
 999
1000                 if (bind(l.sl_sd, *sal, addrlen)) {
1001                         err = sock_errno();
1002                 Debug( LDAP_DEBUG_ANY, "daemon: bind(%ld) failed errno=%d (%s)\n",
1003                        (long) l.sl_sd, err, sock_errstr(err) );
1004                         tcp_close( l.sl_sd );
1005                         sal++;
1006                         continue;
1007                 }
1008
1009         switch ( (*sal)->sa_family ) {
1010 #ifdef LDAP_PF_LOCAL
1011         case AF_LOCAL: {
1012                 char *addr = ((struct sockaddr_un *)*sal)->sun_path;
1013                 l.sl_name.bv_len = strlen(addr) + sizeof("PATH=") - 1;
1014                 l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len + 1 );
1015                 snprintf( l.sl_name.bv_val, l.sl_name.bv_len + 1,
1016                                 "PATH=%s", addr );
1017         } break;
1018 #endif /* LDAP_PF_LOCAL */
1019
1020         case AF_INET: {
1021                 char *s;
1022 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
1023                 char addr[INET_ADDRSTRLEN];
1024                 inet_ntop( AF_INET, &((struct sockaddr_in *)*sal)->sin_addr,
1025                            addr, sizeof(addr) );
1026                 s = addr;
1027 #else
1028                 s = inet_ntoa( ((struct sockaddr_in *) *sal)->sin_addr );
1029 #endif
1030                 port = ntohs( ((struct sockaddr_in *)*sal) ->sin_port );
1031                 l.sl_name.bv_val = ber_memalloc( sizeof("IP=255.255.255.255:65535") );
1032                 snprintf( l.sl_name.bv_val, sizeof("IP=255.255.255.255:65535"),
1033                         "IP=%s:%d",
1034                          s != NULL ? s : SLAP_STRING_UNKNOWN, port );
1035                 l.sl_name.bv_len = strlen( l.sl_name.bv_val );
1036         } break;
1037
1038 #ifdef LDAP_PF_INET6
1039         case AF_INET6: {
1040                 char addr[INET6_ADDRSTRLEN];
1041                 inet_ntop( AF_INET6, &((struct sockaddr_in6 *)*sal)->sin6_addr,
1042                            addr, sizeof addr);
1043                 port = ntohs( ((struct sockaddr_in6 *)*sal)->sin6_port );
1044                 l.sl_name.bv_len = strlen(addr) + sizeof("IP= 65535");
1045                 l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len );
1046                 snprintf( l.sl_name.bv_val, l.sl_name.bv_len, "IP=%s %d",
1047                                 addr, port );
1048                 l.sl_name.bv_len = strlen( l.sl_name.bv_val );
1049         } break;
1050 #endif /* LDAP_PF_INET6 */
1051
1052         default:
1053                 Debug( LDAP_DEBUG_ANY, "daemon: unsupported address family (%d)\n",
1054                         (int) (*sal)->sa_family, 0, 0 );
1055                 break;
1056         }
1057
1058         AC_MEMCPY(&l.sl_sa, *sal, addrlen);
1059         ber_str2bv( url, 0, 1, &l.sl_url);
1060         li = ch_malloc( sizeof( Listener ) );
1061         *li = l;
1062         slap_listeners[*cur] = li;
1063         (*cur)++;
1064         sal++;
1065
1066         } /* while ( *sal != NULL ) */
1067
1068         slap_free_listener_addresses(psal);
1069
1070         if ( l.sl_url.bv_val == NULL )
1071         {
1072                 Debug( LDAP_DEBUG_TRACE,
1073                         "slap_open_listener: failed on %s\n", url, 0, 0 );
1074                 return -1;
1075         }
1076
1077         Debug( LDAP_DEBUG_TRACE, "daemon: initialized %s\n",
1078                 l.sl_url.bv_val, 0, 0 );
1079         return 0;
1080 }
1081
1082 static int sockinit(void);
1083 static int sockdestroy(void);
1084
1085 int slapd_daemon_init( const char *urls )
1086 {
1087         int i, j, n, rc;
1088         char **u;
1089
1090         Debug( LDAP_DEBUG_ARGS, "daemon_init: %s\n",
1091                 urls ? urls : "<null>", 0, 0 );
1092         if( (rc = sockinit()) != 0 ) {
1093                 return rc;
1094         }
1095
1096 #ifdef HAVE_SYSCONF
1097         dtblsize = sysconf( _SC_OPEN_MAX );
1098 #elif HAVE_GETDTABLESIZE
1099         dtblsize = getdtablesize();
1100 #else
1101         dtblsize = FD_SETSIZE;
1102 #endif
1103
1104         /* open a pipe (or something equivalent connected to itself).
1105          * we write a byte on this fd whenever we catch a signal. The main
1106          * loop will be select'ing on this socket, and will wake up when
1107          * this byte arrives.
1108          */
1109         if( (rc = lutil_pair( wake_sds )) < 0 ) {
1110                 Debug( LDAP_DEBUG_ANY,
1111                         "daemon: lutil_pair() failed rc=%d\n", rc, 0, 0 );
1112                 return rc;
1113         }
1114
1115         SLAP_SOCK_SET_INIT;
1116
1117         if( urls == NULL ) {
1118                 urls = "ldap:///";
1119         }
1120
1121         u = ldap_str2charray( urls, " " );
1122
1123         if( u == NULL || u[0] == NULL ) {
1124                 Debug( LDAP_DEBUG_ANY, "daemon_init: no urls (%s) provided.\n",
1125                         urls, 0, 0 );
1126                 return -1;
1127         }
1128
1129         for( i=0; u[i] != NULL; i++ ) {
1130                 Debug( LDAP_DEBUG_TRACE, "daemon_init: listen on %s\n",
1131                         u[i], 0, 0 );
1132         }
1133
1134         if( i == 0 ) {
1135                 Debug( LDAP_DEBUG_ANY, "daemon_init: no listeners to open (%s)\n",
1136                         urls, 0, 0 );
1137                 ldap_charray_free( u );
1138                 return -1;
1139         }
1140
1141         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners to open...\n",
1142                 i, 0, 0 );
1143         slap_listeners = ch_malloc( (i+1)*sizeof(Listener *) );
1144
1145         for(n = 0, j = 0; u[n]; n++ ) {
1146                 if ( slap_open_listener( u[n], &i, &j ) ) {
1147                         ldap_charray_free( u );
1148                         return -1;
1149                 }
1150         }
1151         slap_listeners[j] = NULL;
1152
1153         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners opened\n",
1154                 i, 0, 0 );
1155
1156 #ifdef HAVE_SLP
1157         if( slapd_register_slp ) {
1158                 slapd_slp_init( urls );
1159                 slapd_slp_reg();
1160         }
1161 #endif
1162
1163         ldap_charray_free( u );
1164         ldap_pvt_thread_mutex_init( &slap_daemon.sd_mutex );
1165         return !i;
1166 }
1167
1168
1169 int
1170 slapd_daemon_destroy(void)
1171 {
1172         connections_destroy();
1173         tcp_close( wake_sds[1] );
1174         tcp_close( wake_sds[0] );
1175         sockdestroy();
1176
1177 #ifdef HAVE_SLP
1178         if( slapd_register_slp ) {
1179                 slapd_slp_dereg();
1180                 slapd_slp_deinit();
1181         }
1182 #endif
1183
1184         return 0;
1185 }
1186
1187
1188 static void
1189 close_listeners(
1190         int remove
1191 )
1192 {
1193         int l;
1194
1195         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1196                 if ( slap_listeners[l]->sl_sd != AC_SOCKET_INVALID ) {
1197                         if ( remove )
1198                                 slapd_remove( slap_listeners[l]->sl_sd, 0, 0 );
1199 #ifdef LDAP_PF_LOCAL
1200                         if ( slap_listeners[l]->sl_sa.sa_addr.sa_family == AF_LOCAL ) {
1201                                 unlink( slap_listeners[l]->sl_sa.sa_un_addr.sun_path );
1202                         }
1203 #endif /* LDAP_PF_LOCAL */
1204                         slapd_close( slap_listeners[l]->sl_sd );
1205                 }
1206                 if ( slap_listeners[l]->sl_url.bv_val )
1207                         ber_memfree( slap_listeners[l]->sl_url.bv_val );
1208                 if ( slap_listeners[l]->sl_name.bv_val )
1209                         ber_memfree( slap_listeners[l]->sl_name.bv_val );
1210                 free ( slap_listeners[l] );
1211                 slap_listeners[l] = NULL;
1212         }
1213 }
1214
1215 static int
1216 slapd_handle_listener(
1217         Listener *sl
1218 )
1219 {
1220         Sockaddr                from;
1221
1222         ber_socket_t s;
1223         socklen_t len = sizeof(from);
1224         long id;
1225         slap_ssf_t ssf = 0;
1226         struct berval authid = BER_BVNULL;
1227 #ifdef SLAPD_RLOOKUPS
1228         char hbuf[NI_MAXHOST];
1229 #endif
1230
1231         char    *dnsname = NULL;
1232         char    *peeraddr = NULL;
1233 #ifdef LDAP_PF_LOCAL
1234         char peername[MAXPATHLEN + sizeof("PATH=")];
1235 #elif defined(LDAP_PF_INET6)
1236         char peername[sizeof("IP=ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 65535")];
1237 #else
1238         char peername[sizeof("IP=255.255.255.255:65336")];
1239 #endif /* LDAP_PF_LOCAL */
1240
1241         peername[0] = '\0';
1242
1243 #ifdef LDAP_CONNECTIONLESS
1244         if ( sl->sl_is_udp ) {
1245                 /* The first time we receive a query, we set this
1246                  * up as a "connection". It remains open for the life
1247                  * of the slapd.
1248                  */
1249                 if ( sl->sl_is_udp < 2 ) {
1250                         id = connection_init( sl->sl_sd, sl, "", "",
1251                                 CONN_IS_UDP, ssf, NULL );
1252                     sl->sl_is_udp++;
1253                 }
1254                 return 1;
1255         }
1256 #endif
1257
1258 #  ifdef LDAP_PF_LOCAL
1259         /* FIXME: apparently accept doesn't fill
1260          * the sun_path sun_path member */
1261         from.sa_un_addr.sun_path[0] = '\0';
1262 #  endif /* LDAP_PF_LOCAL */
1263
1264         s = accept( sl->sl_sd, (struct sockaddr *) &from, &len );
1265         if ( s == AC_SOCKET_INVALID ) {
1266                 int err = sock_errno();
1267
1268                 if(
1269 #ifdef EMFILE
1270                     err == EMFILE ||
1271 #endif
1272 #ifdef ENFILE
1273                     err == ENFILE ||
1274 #endif
1275                     0 )
1276                 {
1277                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1278                         emfile++;
1279                         /* Stop listening until an existing session closes */
1280                         sl->sl_is_mute = 1;
1281                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1282                 }
1283
1284                 Debug( LDAP_DEBUG_ANY,
1285                         "daemon: accept(%ld) failed errno=%d (%s)\n",
1286                         (long) sl->sl_sd, err,
1287                         sock_errstr(err) );
1288                 ldap_pvt_thread_yield();
1289                 return 0;
1290         }
1291
1292 #ifndef HAVE_WINSOCK
1293         /* make sure descriptor number isn't too great */
1294         if ( s >= dtblsize ) {
1295                 Debug( LDAP_DEBUG_ANY,
1296                         "daemon: %ld beyond descriptor table size %ld\n",
1297                         (long) s, (long) dtblsize, 0 );
1298
1299                 slapd_close(s);
1300                 ldap_pvt_thread_yield();
1301                 return 0;
1302         }
1303 #endif
1304
1305 #ifdef LDAP_DEBUG
1306         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1307
1308         /* newly accepted stream should not be in any of the FD SETS */
1309         assert( SLAP_SOCK_NOT_ACTIVE( s ));
1310
1311         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1312 #endif
1313
1314 #if defined( SO_KEEPALIVE ) || defined( TCP_NODELAY )
1315 #ifdef LDAP_PF_LOCAL
1316         /* for IPv4 and IPv6 sockets only */
1317         if ( from.sa_addr.sa_family != AF_LOCAL )
1318 #endif /* LDAP_PF_LOCAL */
1319         {
1320                 int rc;
1321                 int tmp;
1322 #ifdef SO_KEEPALIVE
1323                 /* enable keep alives */
1324                 tmp = 1;
1325                 rc = setsockopt( s, SOL_SOCKET, SO_KEEPALIVE,
1326                         (char *) &tmp, sizeof(tmp) );
1327                 if ( rc == AC_SOCKET_ERROR ) {
1328                         int err = sock_errno();
1329                         Debug( LDAP_DEBUG_ANY,
1330                                 "slapd(%ld): setsockopt(SO_KEEPALIVE) failed "
1331                                 "errno=%d (%s)\n", (long) s, err, sock_errstr(err) );
1332                 }
1333 #endif
1334 #ifdef TCP_NODELAY
1335                 /* enable no delay */
1336                 tmp = 1;
1337                 rc = setsockopt( s, IPPROTO_TCP, TCP_NODELAY,
1338                         (char *)&tmp, sizeof(tmp) );
1339                 if ( rc == AC_SOCKET_ERROR ) {
1340                         int err = sock_errno();
1341                         Debug( LDAP_DEBUG_ANY,
1342                                 "slapd(%ld): setsockopt(TCP_NODELAY) failed "
1343                                 "errno=%d (%s)\n", (long) s, err, sock_errstr(err) );
1344                 }
1345 #endif
1346         }
1347 #endif
1348
1349         Debug( LDAP_DEBUG_CONNS, "daemon: new connection on %ld\n",
1350                 (long) s, 0, 0 );
1351         switch ( from.sa_addr.sa_family ) {
1352 #  ifdef LDAP_PF_LOCAL
1353         case AF_LOCAL:
1354                 /* FIXME: apparently accept doesn't fill
1355                  * the sun_path sun_path member */
1356                 if ( from.sa_un_addr.sun_path[0] == '\0' ) {
1357                         AC_MEMCPY( from.sa_un_addr.sun_path,
1358                                         sl->sl_sa.sa_un_addr.sun_path,
1359                                         sizeof( from.sa_un_addr.sun_path ) );
1360                 }
1361
1362                 sprintf( peername, "PATH=%s", from.sa_un_addr.sun_path );
1363                 ssf = local_ssf;
1364                 {
1365                         uid_t uid;
1366                         gid_t gid;
1367
1368                         if( getpeereid( s, &uid, &gid ) == 0 ) {
1369                                 authid.bv_val = ch_malloc(
1370                                         STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
1371                                         "cn=peercred,cn=external,cn=auth" ) + 1 );
1372                                 authid.bv_len = sprintf( authid.bv_val,
1373                                         "gidNumber=%d+uidNumber=%d,"
1374                                         "cn=peercred,cn=external,cn=auth",
1375                                         (int) gid, (int) uid );
1376                                 assert( authid.bv_len <=
1377                                         STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
1378                                         "cn=peercred,cn=external,cn=auth" ) );
1379                         }
1380                 }
1381                 dnsname = "local";
1382                 break;
1383 #endif /* LDAP_PF_LOCAL */
1384
1385 #  ifdef LDAP_PF_INET6
1386         case AF_INET6:
1387         if ( IN6_IS_ADDR_V4MAPPED(&from.sa_in6_addr.sin6_addr) ) {
1388                 peeraddr = inet_ntoa( *((struct in_addr *)
1389                                         &from.sa_in6_addr.sin6_addr.s6_addr[12]) );
1390                 sprintf( peername, "IP=%s:%d",
1391                          peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1392                          (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
1393         } else {
1394                 char addr[INET6_ADDRSTRLEN];
1395
1396                 peeraddr = (char *) inet_ntop( AF_INET6,
1397                                       &from.sa_in6_addr.sin6_addr,
1398                                       addr, sizeof addr );
1399                 sprintf( peername, "IP=%s %d",
1400                          peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1401                          (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
1402         }
1403         break;
1404 #  endif /* LDAP_PF_INET6 */
1405
1406         case AF_INET:
1407         peeraddr = inet_ntoa( from.sa_in_addr.sin_addr );
1408         sprintf( peername, "IP=%s:%d",
1409                 peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1410                 (unsigned) ntohs( from.sa_in_addr.sin_port ) );
1411                 break;
1412
1413         default:
1414                 slapd_close(s);
1415                 return 0;
1416         }
1417
1418         if ( ( from.sa_addr.sa_family == AF_INET )
1419 #ifdef LDAP_PF_INET6
1420                 || ( from.sa_addr.sa_family == AF_INET6 )
1421 #endif
1422         ) {
1423 #ifdef SLAPD_RLOOKUPS
1424                 if ( use_reverse_lookup ) {
1425                         char *herr;
1426                         if (ldap_pvt_get_hname( (const struct sockaddr *)&from, len, hbuf,
1427                                 sizeof(hbuf), &herr ) == 0) {
1428                                 ldap_pvt_str2lower( hbuf );
1429                                 dnsname = hbuf;
1430                         }
1431                 }
1432 #else
1433                 dnsname = NULL;
1434 #endif /* SLAPD_RLOOKUPS */
1435
1436 #ifdef HAVE_TCPD
1437                 if ( !hosts_ctl("slapd",
1438                                 dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1439                                 peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1440                                 SLAP_STRING_UNKNOWN ))
1441                 {
1442                         /* DENY ACCESS */
1443                         Statslog( LDAP_DEBUG_STATS,
1444                                 "fd=%ld DENIED from %s (%s)\n",
1445                                 (long) s,
1446                                 dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1447                                 peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1448                                 0, 0 );
1449                         slapd_close(s);
1450                         return 0;
1451                 }
1452 #endif /* HAVE_TCPD */
1453         }
1454
1455         id = connection_init(s, sl,
1456                 dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1457                 peername,
1458 #ifdef HAVE_TLS
1459                 sl->sl_is_tls ? CONN_IS_TLS : 0,
1460 #else
1461                 0,
1462 #endif
1463                 ssf,
1464                 authid.bv_val ? &authid : NULL );
1465
1466         if( authid.bv_val ) ch_free(authid.bv_val);
1467
1468         if( id < 0 ) {
1469                 Debug( LDAP_DEBUG_ANY,
1470                         "daemon: connection_init(%ld, %s, %s) failed.\n",
1471                         (long) s, peername, sl->sl_name.bv_val );
1472                 slapd_close(s);
1473                 return 0;
1474         }
1475
1476         Statslog( LDAP_DEBUG_STATS,
1477                 "conn=%ld fd=%ld ACCEPT from %s (%s)\n",
1478                 id, (long) s, peername, sl->sl_name.bv_val,
1479                 0 );
1480
1481         slapd_add( s, 1, NULL );
1482         return 0;
1483 }
1484
1485 static void *
1486 slapd_daemon_task(
1487         void *ptr
1488 )
1489 {
1490         int l;
1491         time_t  last_idle_check = 0;
1492         struct timeval idle;
1493         int ebadf = 0;
1494
1495 #define SLAPD_IDLE_CHECK_LIMIT 4
1496
1497         if ( global_idletimeout > 0 ) {
1498                 last_idle_check = slap_get_time();
1499                 /* Set the select timeout.
1500                  * Don't just truncate, preserve the fractions of
1501                  * seconds to prevent sleeping for zero time.
1502                  */
1503                 idle.tv_sec = global_idletimeout/SLAPD_IDLE_CHECK_LIMIT;
1504                 idle.tv_usec = global_idletimeout - idle.tv_sec * SLAPD_IDLE_CHECK_LIMIT;
1505                 idle.tv_usec *= 1000000 / SLAPD_IDLE_CHECK_LIMIT;
1506         } else {
1507                 idle.tv_sec = 0;
1508                 idle.tv_usec = 0;
1509         }
1510
1511         slapd_add( wake_sds[0], 0, NULL );
1512
1513         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1514                 if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID )
1515                         continue;
1516 #ifdef LDAP_CONNECTIONLESS
1517                 /* Since this is connectionless, the data port is the
1518                  * listening port. The listen() and accept() calls
1519                  * are unnecessary.
1520                  */
1521                 if ( slap_listeners[l]->sl_is_udp ) {
1522                         slapd_add( slap_listeners[l]->sl_sd, 1, slap_listeners[l] );
1523                         continue;
1524                 }
1525 #endif
1526
1527                 if ( listen( slap_listeners[l]->sl_sd, SLAPD_LISTEN_BACKLOG ) == -1 ) {
1528                         int err = sock_errno();
1529
1530 #ifdef LDAP_PF_INET6
1531                         /* If error is EADDRINUSE, we are trying to listen to INADDR_ANY and
1532                          * we are already listening to in6addr_any, then we want to ignore
1533                          * this and continue.
1534                          */
1535                         if ( err == EADDRINUSE ) {
1536                                 int i;
1537                                 struct sockaddr_in sa = slap_listeners[l]->sl_sa.sa_in_addr;
1538                                 struct sockaddr_in6 sa6;
1539
1540                                 if ( sa.sin_family == AF_INET &&
1541                                      sa.sin_addr.s_addr == htonl(INADDR_ANY) ) {
1542                                         for ( i = 0 ; i < l; i++ ) {
1543                                                 sa6 = slap_listeners[i]->sl_sa.sa_in6_addr;
1544                                                 if ( sa6.sin6_family == AF_INET6 &&
1545                                                      !memcmp( &sa6.sin6_addr, &in6addr_any, sizeof(struct in6_addr) ) )
1546                                                         break;
1547                                         }
1548
1549                                         if ( i < l ) {
1550                                                 /* We are already listening to in6addr_any */
1551                                                 Debug( LDAP_DEBUG_CONNS,
1552                                                        "daemon: Attempt to listen to 0.0.0.0 failed, already listening on ::, assuming IPv4 included\n",
1553                                                        0, 0, 0 );
1554                                                 slapd_close( slap_listeners[l]->sl_sd );
1555                                                 slap_listeners[l]->sl_sd = AC_SOCKET_INVALID;
1556                                                 continue;
1557                                         }
1558                                 }
1559                         }
1560 #endif
1561                         Debug( LDAP_DEBUG_ANY,
1562                                 "daemon: listen(%s, 5) failed errno=%d (%s)\n",
1563                                         slap_listeners[l]->sl_url.bv_val, err,
1564                                         sock_errstr(err) );
1565                         return( (void*)-1 );
1566                 }
1567
1568                 slapd_add( slap_listeners[l]->sl_sd, 0, slap_listeners[l] );
1569         }
1570
1571 #ifdef HAVE_NT_SERVICE_MANAGER
1572         if ( started_event != NULL ) {
1573                 ldap_pvt_thread_cond_signal( &started_event );
1574         }
1575 #endif
1576         /* initialization complete. Here comes the loop. */
1577
1578         while ( !slapd_shutdown ) {
1579                 ber_socket_t i;
1580                 int ns, nwriters;
1581                 int at;
1582                 ber_socket_t nfds;
1583 #if SLAP_EVENTS_ARE_INDEXED
1584                 ber_socket_t nrfds, nwfds;
1585 #endif
1586 #define SLAPD_EBADF_LIMIT 16
1587
1588                 time_t  now;
1589
1590                 SLAP_EVENT_DECL;
1591
1592                 struct timeval          tv;
1593                 struct timeval          *tvp;
1594
1595                 struct timeval          *cat;
1596                 time_t                          tdelta = 1;
1597                 struct re_s*            rtask;
1598                 now = slap_get_time();
1599
1600                 if( ( global_idletimeout > 0 ) &&
1601                         difftime( last_idle_check +
1602                         global_idletimeout/SLAPD_IDLE_CHECK_LIMIT, now ) < 0 ) {
1603                         connections_timeout_idle( now );
1604                         last_idle_check = now;
1605                 }
1606                 tv = idle;
1607
1608 #ifdef SIGHUP
1609                 if( slapd_gentle_shutdown ) {
1610                         ber_socket_t active;
1611
1612                         if( slapd_gentle_shutdown == 1 ) {
1613                                 Debug( LDAP_DEBUG_ANY, "slapd gentle shutdown\n", 0, 0, 0 );
1614                                 close_listeners( 1 );
1615                                 frontendDB->be_restrictops |= SLAP_RESTRICT_OP_WRITES;
1616                                 slapd_gentle_shutdown = 2;
1617                         }
1618
1619                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1620                         active = slap_daemon.sd_nactives;
1621                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1622                         if( active == 0 ) {
1623                                 slapd_shutdown = 2;
1624                                 break;
1625                         }
1626                 }
1627 #endif
1628
1629                 at = 0;
1630
1631                 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1632
1633                 nwriters = slap_daemon.sd_nwriters;
1634                 SLAP_EVENT_INIT;
1635
1636                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1637                         if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID )
1638                                 continue;
1639                         if ( slap_listeners[l]->sl_is_mute )
1640                                 SLAP_SOCK_SET_MUTE( slap_listeners[l]->sl_sd );
1641                         else
1642                         if ( SLAP_SOCK_IS_MUTE( slap_listeners[l]->sl_sd ))
1643                             SLAP_SOCK_CLR_MUTE( slap_listeners[l]->sl_sd );
1644                 }
1645
1646                 nfds = SLAP_EVENT_MAX;
1647
1648                 if ( global_idletimeout && slap_daemon.sd_nactives )
1649                         at = 1;
1650
1651                 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1652
1653                 if ( at
1654 #if defined(HAVE_YIELDING_SELECT) || defined(NO_THREADS)
1655                         &&  ( tv.tv_sec || tv.tv_usec )
1656 #endif
1657                         )
1658                         tvp = &tv;
1659                 else
1660                         tvp = NULL;
1661
1662                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
1663                 rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
1664                 while ( cat && cat->tv_sec && cat->tv_sec <= now ) {
1665                         if ( ldap_pvt_runqueue_isrunning( &slapd_rq, rtask )) {
1666                                 ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
1667                         } else {
1668                                 ldap_pvt_runqueue_runtask( &slapd_rq, rtask );
1669                                 ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
1670                                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
1671                                 ldap_pvt_thread_pool_submit( &connection_pool,
1672                                                                                         rtask->routine, (void *) rtask );
1673                                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
1674                         }
1675                         rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
1676                 }
1677                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
1678
1679                 if ( cat && cat->tv_sec ) {
1680                         time_t diff = difftime( cat->tv_sec, now );
1681                         if ( diff == 0 )
1682                                 diff = tdelta;
1683                         if ( tvp == NULL || diff < tv.tv_sec ) {
1684                                 tv.tv_sec = diff;
1685                                 tv.tv_usec = 0;
1686                                 tvp = &tv;
1687                         }
1688                 }
1689
1690                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1691                         if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ||
1692                             slap_listeners[l]->sl_is_mute )
1693                                 continue;
1694
1695                         Debug( LDAP_DEBUG_CONNS,
1696                                 "daemon: select: listen=%d active_threads=%d tvp=%s\n",
1697                                         slap_listeners[l]->sl_sd, at,
1698                                         tvp == NULL ? "NULL" : "zero" );
1699                 }
1700
1701                 switch(ns = SLAP_EVENT_WAIT(tvp))
1702                 {
1703                 case -1: {      /* failure - try again */
1704                                 int err = sock_errno();
1705
1706                                 if( err == EBADF
1707 #ifdef WSAENOTSOCK
1708                                         /* you'd think this would be EBADF */
1709                                         || err == WSAENOTSOCK
1710 #endif
1711                                 ) {
1712                                         if (++ebadf < SLAPD_EBADF_LIMIT)
1713                                                 continue;
1714                                 }
1715
1716                                 if( err != EINTR ) {
1717                                         Debug( LDAP_DEBUG_CONNS,
1718                                                 "daemon: select failed (%d): %s\n",
1719                                                 err, sock_errstr(err), 0 );
1720                                         slapd_shutdown = 2;
1721                                 }
1722                         }
1723                         continue;
1724
1725                 case 0:         /* timeout - let threads run */
1726                         ebadf = 0;
1727 #ifndef HAVE_YIELDING_SELECT
1728                         Debug( LDAP_DEBUG_CONNS, "daemon: select timeout - yielding\n",
1729                             0, 0, 0 );
1730
1731                         ldap_pvt_thread_yield();
1732 #endif
1733                         continue;
1734
1735                 default:        /* something happened - deal with it */
1736                         if( slapd_shutdown ) continue;
1737
1738                         ebadf = 0;
1739                         Debug( LDAP_DEBUG_CONNS, "daemon: activity on %d descriptors\n",
1740                                 ns, 0, 0 );
1741                         /* FALL THRU */
1742                 }
1743
1744 #if SLAP_EVENTS_ARE_INDEXED
1745                 if ( SLAP_EVENT_IS_READ( wake_sds[0] )) {
1746                         char c[BUFSIZ];
1747                         tcp_read( wake_sds[0], c, sizeof(c) );
1748                         waking = 0;
1749                         ns--;
1750                         SLAP_EVENT_CLR_READ( wake_sds[0] );
1751                         continue;
1752                 }
1753
1754                 /* The event slot equals the descriptor number - this is
1755                  * true for Unix select and poll. We treat Windows select
1756                  * like this too, even though it's a kludge.
1757                  */
1758                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1759                         int rc;
1760
1761                         if ( ns <= 0 ) break;
1762
1763                         if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID )
1764                                 continue;
1765
1766                         if ( !SLAP_EVENT_IS_READ( slap_listeners[l]->sl_sd ))
1767                                 continue;
1768
1769                         rc = slapd_handle_listener(slap_listeners[l]);
1770
1771 #ifdef LDAP_CONNECTIONLESS
1772                         /* This is a UDP session, let the data loop process it */
1773                         if ( rc ) continue;
1774 #endif
1775
1776                         ns--;
1777
1778                         /* Don't need to look at this in the data loops */
1779                         SLAP_EVENT_CLR_READ( slap_listeners[l]->sl_sd );
1780                         SLAP_EVENT_CLR_WRITE( slap_listeners[l]->sl_sd );
1781                 }
1782
1783                 /* bypass the following tests if no descriptors left */
1784                 if ( ns <= 0 ) {
1785 #ifndef HAVE_YIELDING_SELECT
1786                         ldap_pvt_thread_yield();
1787 #endif
1788                         continue;
1789                 }
1790
1791                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
1792 #ifdef HAVE_WINSOCK
1793                 nrfds = readfds.fd_count;
1794                 nwfds = writefds.fd_count;
1795                 for ( i = 0; i < readfds.fd_count; i++ ) {
1796                         Debug( LDAP_DEBUG_CONNS, " %d%s",
1797                                 readfds.fd_array[i], "r", 0 );
1798                 }
1799                 for ( i = 0; i < writefds.fd_count; i++ ) {
1800                         Debug( LDAP_DEBUG_CONNS, " %d%s",
1801                                 writefds.fd_array[i], "w", 0 );
1802                 }
1803
1804 #else
1805                 nrfds = 0;
1806                 nwfds = 0;
1807                 for ( i = 0; i < nfds; i++ ) {
1808                         int     r, w;
1809
1810                         r = SLAP_EVENT_IS_READ( i );
1811                         /* writefds was not initialized if nwriters was zero */
1812                         w = nwriters ? SLAP_EVENT_IS_WRITE( i ) : 0;
1813                         if ( r || w ) {
1814                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", i,
1815                                     r ? "r" : "", w ? "w" : "" );
1816                                 if ( r ) {
1817                                         nrfds++;
1818                                         ns--;
1819                                 }
1820                                 if ( w ) {
1821                                         nwfds++;
1822                                         ns--;
1823                                 }
1824                         }
1825                         if ( ns <= 0 ) break;
1826                 }
1827 #endif
1828                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
1829
1830
1831                 /* loop through the writers */
1832                 for ( i = 0; nwfds > 0; i++ )
1833                 {
1834                         ber_socket_t wd;
1835 #ifdef HAVE_WINSOCK
1836                         wd = writefds.fd_array[i];
1837 #else
1838                         if( ! SLAP_EVENT_IS_WRITE( i ) ) {
1839                                 continue;
1840                         }
1841                         wd = i;
1842 #endif
1843                         nwfds--;
1844
1845                         Debug( LDAP_DEBUG_CONNS,
1846                                 "daemon: write active on %d\n",
1847                                 wd, 0, 0 );
1848                         /*
1849                          * NOTE: it is possible that the connection was closed
1850                          * and that the stream is now inactive.
1851                          * connection_write() must valid the stream is still
1852                          * active.
1853                          */
1854
1855                         if ( connection_write( wd ) < 0 ) {
1856                                 if ( SLAP_EVENT_IS_READ( wd )) {
1857                                         SLAP_EVENT_CLR_READ( (unsigned) wd );
1858                                         nrfds--;
1859                                 }
1860                                 slapd_close( wd );
1861                         }
1862                         SLAP_EVENT_CLR_WRITE( wd );
1863                 }
1864
1865                 for ( i = 0; nrfds > 0; i++ )
1866                 {
1867                         ber_socket_t rd;
1868 #ifdef HAVE_WINSOCK
1869                         rd = readfds.fd_array[i];
1870 #else
1871                         if( ! SLAP_EVENT_IS_READ( i ) ) {
1872                                 continue;
1873                         }
1874                         rd = i;
1875 #endif
1876                         nrfds--;
1877
1878                         Debug ( LDAP_DEBUG_CONNS,
1879                                 "daemon: read activity on %d\n", rd, 0, 0 );
1880                         /*
1881                          * NOTE: it is possible that the connection was closed
1882                          * and that the stream is now inactive.
1883                          * connection_read() must valid the stream is still
1884                          * active.
1885                          */
1886
1887                         if ( connection_read( rd ) < 0 ) {
1888                                 slapd_close( rd );
1889                         }
1890                 }
1891 #else   /* !SLAP_EVENTS_ARE_INDEXED */
1892         /* FIXME */
1893         /* The events are returned in an arbitrary list. This is true
1894          * for /dev/poll, epoll and kqueue. In order to prioritize things
1895          * so that we can handle wake_sds first, listeners second, and then
1896          * all other connections last (as we do for select), we would need
1897          * to use multiple event handles and cascade them.
1898          *
1899          * That seems like a bit of hassle. So the wake_sds check has been
1900          * skipped. For epoll and kqueue we can associate arbitrary data with
1901          * an event, so we could use pointers to the listener structure
1902          * instead of just the file descriptor. For /dev/poll we have to
1903          * search the listeners array for a matching descriptor.
1904          */
1905                 /* if waking is set and we woke up, we'll read whatever
1906                  * we can.
1907                  */
1908                 if ( waking ) {
1909                         char c[BUFSIZ];
1910                         tcp_read( wake_sds[0], c, sizeof(c) );
1911                         waking = 0;
1912                         ns--;
1913                         continue;
1914                 }
1915
1916 #ifdef LDAP_DEBUG
1917                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
1918
1919                 for (i=0; i<ns; i++) {
1920                         int     r, w;
1921
1922                         if ( SLAP_EVENT_IS_LISTENER(i)
1923 #ifdef LDAP_CONNECTIONLESS
1924                         && !((SLAP_EVENT_LISTENER(i))->sl_is_udp)
1925 #endif
1926                          ) continue;
1927
1928                         /* Don't log internal wake events */
1929                         if ( SLAP_EVENT_FD( i ) == wake_sds[0] )
1930                                 continue;
1931
1932                         r = SLAP_EVENT_IS_READ( i );
1933                         w = SLAP_EVENT_IS_WRITE( i );
1934                         if ( r || w ) {
1935                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", SLAP_EVENT_FD(i),
1936                                     r ? "r" : "", w ? "w" : "" );
1937                         }
1938                 }
1939 #endif
1940                 for (i=0; i<ns; i++) {
1941                         int rc = 1, fd;
1942
1943                         if ( SLAP_EVENT_IS_LISTENER(i) ) {
1944                                 rc = slapd_handle_listener( SLAP_EVENT_LISTENER( i ));
1945                         }
1946                         /* If we found a regular listener, rc is now zero, and we
1947                          * can skip the data portion. But if it was a UDP listener
1948                          * then rc is still 1, and we want to handle the data.
1949                          */
1950                         if ( rc ) {
1951                                 fd = SLAP_EVENT_FD( i );
1952
1953                                 /* Ignore wake events, they were handled above */
1954                                 if ( fd == wake_sds[0] )
1955                                         continue;
1956
1957                                 if( SLAP_EVENT_IS_WRITE( i ) ) {
1958                                         Debug( LDAP_DEBUG_CONNS,
1959                                                 "daemon: write active on %d\n",
1960                                                 fd, 0, 0 );
1961                                         /*
1962                                          * NOTE: it is possible that the connection was closed
1963                                          * and that the stream is now inactive.
1964                                          * connection_write() must valid the stream is still
1965                                          * active.
1966                                          */
1967
1968                                         if ( connection_write( fd ) < 0 ) {
1969                                                 slapd_close( fd );
1970                                                 continue;
1971                                         }
1972                                 }
1973                                 if( SLAP_EVENT_IS_READ( i ) ) {
1974                                         Debug( LDAP_DEBUG_CONNS,
1975                                                 "daemon: read active on %d\n",
1976                                                 fd, 0, 0 );
1977                                         /*
1978                                          * NOTE: it is possible that the connection was closed
1979                                          * and that the stream is now inactive.
1980                                          * connection_read() must valid the stream is still
1981                                          * active.
1982                                          */
1983
1984                                         if ( connection_read( fd ) < 0 ) {
1985                                                 slapd_close( fd );
1986                                         }
1987                                 }
1988                         }
1989                 }
1990 #endif  /* SLAP_EVENTS_ARE_INDEXED */
1991
1992 #ifndef HAVE_YIELDING_SELECT
1993                 ldap_pvt_thread_yield();
1994 #endif
1995         }
1996
1997         if( slapd_shutdown == 1 ) {
1998                 Debug( LDAP_DEBUG_ANY,
1999                         "daemon: shutdown requested and initiated.\n",
2000                         0, 0, 0 );
2001
2002         } else if ( slapd_shutdown == 2 ) {
2003 #ifdef HAVE_NT_SERVICE_MANAGER
2004                         Debug( LDAP_DEBUG_ANY,
2005                                "daemon: shutdown initiated by Service Manager.\n",
2006                                0, 0, 0);
2007 #else /* !HAVE_NT_SERVICE_MANAGER */
2008                         Debug( LDAP_DEBUG_ANY,
2009                                "daemon: abnormal condition, shutdown initiated.\n",
2010                                0, 0, 0 );
2011 #endif /* !HAVE_NT_SERVICE_MANAGER */
2012         } else {
2013                 Debug( LDAP_DEBUG_ANY,
2014                        "daemon: no active streams, shutdown initiated.\n",
2015                        0, 0, 0 );
2016         }
2017
2018         if( slapd_gentle_shutdown != 2 ) {
2019                 close_listeners ( 0 );
2020         }
2021
2022         if( !slapd_gentle_shutdown ) {
2023                 slapd_abrupt_shutdown = 1;
2024                 connections_shutdown();
2025         }
2026
2027         Debug( LDAP_DEBUG_ANY,
2028             "slapd shutdown: waiting for %d threads to terminate\n",
2029             ldap_pvt_thread_pool_backload(&connection_pool), 0, 0 );
2030         ldap_pvt_thread_pool_destroy(&connection_pool, 1);
2031
2032         free ( slap_listeners );
2033         slap_listeners = NULL;
2034
2035         return NULL;
2036 }
2037
2038
2039 int slapd_daemon( void )
2040 {
2041         int rc;
2042
2043         connections_init();
2044
2045 #define SLAPD_LISTENER_THREAD 1
2046 #if defined( SLAPD_LISTENER_THREAD )
2047         {
2048                 ldap_pvt_thread_t       listener_tid;
2049
2050                 /* listener as a separate THREAD */
2051                 rc = ldap_pvt_thread_create( &listener_tid,
2052                         0, slapd_daemon_task, NULL );
2053
2054                 if ( rc != 0 ) {
2055                         Debug( LDAP_DEBUG_ANY,
2056                         "listener ldap_pvt_thread_create failed (%d)\n", rc, 0, 0 );
2057                         return rc;
2058                 }
2059
2060                 /* wait for the listener thread to complete */
2061                 ldap_pvt_thread_join( listener_tid, (void *) NULL );
2062         }
2063 #else
2064         /* experimental code */
2065         slapd_daemon_task( NULL );
2066 #endif
2067
2068         return 0;
2069
2070 }
2071
2072 static int sockinit(void)
2073 {
2074 #if defined( HAVE_WINSOCK2 )
2075     WORD wVersionRequested;
2076         WSADATA wsaData;
2077         int err;
2078
2079         wVersionRequested = MAKEWORD( 2, 0 );
2080
2081         err = WSAStartup( wVersionRequested, &wsaData );
2082         if ( err != 0 ) {
2083                 /* Tell the user that we couldn't find a usable */
2084                 /* WinSock DLL.                                  */
2085                 return -1;
2086         }
2087
2088         /* Confirm that the WinSock DLL supports 2.0.*/
2089         /* Note that if the DLL supports versions greater    */
2090         /* than 2.0 in addition to 2.0, it will still return */
2091         /* 2.0 in wVersion since that is the version we      */
2092         /* requested.                                        */
2093
2094         if ( LOBYTE( wsaData.wVersion ) != 2 ||
2095                 HIBYTE( wsaData.wVersion ) != 0 )
2096         {
2097             /* Tell the user that we couldn't find a usable */
2098             /* WinSock DLL.                                  */
2099             WSACleanup();
2100             return -1;
2101         }
2102
2103         /* The WinSock DLL is acceptable. Proceed. */
2104 #elif defined( HAVE_WINSOCK )
2105         WSADATA wsaData;
2106         if ( WSAStartup( 0x0101, &wsaData ) != 0 ) {
2107             return -1;
2108         }
2109 #endif
2110         return 0;
2111 }
2112
2113 static int sockdestroy(void)
2114 {
2115 #if defined( HAVE_WINSOCK2 ) || defined( HAVE_WINSOCK )
2116         WSACleanup();
2117 #endif
2118         return 0;
2119 }
2120
2121 RETSIGTYPE
2122 slap_sig_shutdown( int sig )
2123 {
2124 #if 0
2125         Debug(LDAP_DEBUG_TRACE, "slap_sig_shutdown: signal %d\n", sig, 0, 0);
2126 #endif
2127
2128         /*
2129          * If the NT Service Manager is controlling the server, we don't
2130          * want SIGBREAK to kill the server. For some strange reason,
2131          * SIGBREAK is generated when a user logs out.
2132          */
2133
2134 #if HAVE_NT_SERVICE_MANAGER && SIGBREAK
2135         if (is_NT_Service && sig == SIGBREAK)
2136                 ;
2137         else
2138 #endif
2139 #ifdef SIGHUP
2140         if (sig == SIGHUP && global_gentlehup && slapd_gentle_shutdown == 0)
2141                 slapd_gentle_shutdown = 1;
2142         else
2143 #endif
2144         slapd_shutdown = 1;
2145         WAKE_LISTENER(1);
2146
2147         /* reinstall self */
2148         (void) SIGNAL_REINSTALL( sig, slap_sig_shutdown );
2149 }
2150
2151 RETSIGTYPE
2152 slap_sig_wake( int sig )
2153 {
2154         WAKE_LISTENER(1);
2155
2156         /* reinstall self */
2157         (void) SIGNAL_REINSTALL( sig, slap_sig_wake );
2158 }
2159
2160
2161 void slapd_add_internal(ber_socket_t s, int isactive) {
2162         slapd_add(s, isactive, NULL);
2163 }
2164
2165 Listener ** slapd_get_listeners(void) {
2166         return slap_listeners;
2167 }
2168
2169 void slap_wake_listener()
2170 {
2171         WAKE_LISTENER(1);
2172 }