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