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