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 1998-2006 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  16  * All rights reserved.
  17  *
  18  * Redistribution and use in source and binary forms are permitted
  19  * provided that this notice is preserved and that due credit is given
  20  * to the University of Michigan at Ann Arbor. The name of the University
  21  * may not be used to endorse or promote products derived from this
  22  * software without specific prior written permission. This software
  23  * is provided ``as is'' without express or implied warranty.
  24  */
  25
  26 #include "portable.h"
  27
  28 #include <stdio.h>
  29
  30 #include <ac/ctype.h>
  31 #include <ac/errno.h>
  32 #include <ac/socket.h>
  33 #include <ac/string.h>
  34 #include <ac/time.h>
  35 #include <ac/unistd.h>
  36
  37 #include "slap.h"
  38 #include "ldap_pvt_thread.h"
  39 #include "lutil.h"
  40
  41 #include "ldap_rq.h"
  42
  43 #if defined(HAVE_SYS_EPOLL_H) && defined(HAVE_EPOLL)
  44 # include <sys/epoll.h>
  45 #elif defined(SLAP_X_DEVPOLL) && defined(HAVE_SYS_DEVPOLL_H) && defined(HAVE_DEVPOLL)
  46 # include <sys/types.h>
  47 # include <sys/stat.h>
  48 # include <fcntl.h>
  49 # include <sys/devpoll.h>
  50 #endif /* ! epoll && ! /dev/poll */
  51
  52 #ifdef HAVE_TCPD
  53 # include <tcpd.h>
  54 int allow_severity = LOG_INFO;
  55 int deny_severity = LOG_NOTICE;
  56
  57 # define SLAP_STRING_UNKNOWN    STRING_UNKNOWN
  58 #else /* ! TCP Wrappers */
  59 # define SLAP_STRING_UNKNOWN    "unknown"
  60 #endif /* ! TCP Wrappers */
  61
  62 #ifdef LDAP_PF_LOCAL
  63 # include <sys/stat.h>
  64 /* this should go in <ldap.h> as soon as it is accepted */
  65 # define LDAPI_MOD_URLEXT               "x-mod"
  66 #endif /* LDAP_PF_LOCAL */
  67
  68 #ifdef LDAP_PF_INET6
  69 int slap_inet4or6 = AF_UNSPEC;
  70 #else /* ! INETv6 */
  71 int slap_inet4or6 = AF_INET;
  72 #endif /* ! INETv6 */
  73
  74 /* globals */
  75 time_t starttime;
  76 ber_socket_t dtblsize;
  77 slap_ssf_t local_ssf = LDAP_PVT_SASL_LOCAL_SSF;
  78 struct runqueue_s slapd_rq;
  79
  80 Listener **slap_listeners = NULL;
  81
  82 #ifndef SLAPD_LISTEN_BACKLOG
  83 #define SLAPD_LISTEN_BACKLOG 1024
  84 #endif /* ! SLAPD_LISTEN_BACKLOG */
  85
  86 static ber_socket_t wake_sds[2];
  87 static int emfile;
  88
  89 static volatile int waking;
  90 #ifdef NO_THREADS
  91 #define WAKE_LISTENER(w)        do { \
  92         if ((w) && ++waking < 5) { \
  93                 tcp_write( wake_sds[1], "0", 1 ); \
  94         } \
  95 } while (0)
  96 #else /* ! NO_THREADS */
  97 #define WAKE_LISTENER(w)        do { \
  98         if (w) { \
  99                 tcp_write( wake_sds[1], "0", 1 ); \
 100         } \
 101 } while (0)
 102 #endif /* ! NO_THREADS */
 103
 104 volatile sig_atomic_t slapd_shutdown = 0;
 105 volatile sig_atomic_t slapd_gentle_shutdown = 0;
 106 volatile sig_atomic_t slapd_abrupt_shutdown = 0;
 107
 108 static struct slap_daemon {
 109         ldap_pvt_thread_mutex_t sd_mutex;
 110 #ifdef HAVE_TCPD
 111         ldap_pvt_thread_mutex_t sd_tcpd_mutex;
 112 #endif /* TCP Wrappers */
 113
 114         ber_socket_t            sd_nactives;
 115         int                     sd_nwriters;
 116
 117 #if defined(HAVE_EPOLL)
 118         struct epoll_event      *sd_epolls;
 119         int                     *sd_index;
 120         int                     sd_epfd;
 121         int                     sd_nfds;
 122 #elif defined(SLAP_X_DEVPOLL) && defined(HAVE_DEVPOLL)
 123         /* eXperimental */
 124         struct pollfd           *sd_pollfd;
 125         int                     *sd_index;
 126         Listener                **sd_l;
 127         int                     sd_dpfd;
 128         int                     sd_nfds;
 129 #else /* ! epoll && ! /dev/poll */
 130 #ifndef HAVE_WINSOCK
 131         /* In winsock, accept() returns values higher than dtblsize
 132                 so don't bother with this optimization */
 133         int                     sd_nfds;
 134 #endif /* ! HAVE_WINSOCK */
 135         fd_set                  sd_actives;
 136         fd_set                  sd_readers;
 137         fd_set                  sd_writers;
 138 #endif /* ! epoll && ! /dev/poll */
 139 } slap_daemon;
 140
 141 /*
 142  * NOTE: naming convention for macros:
 143  *
 144  * - SLAP_SOCK_* and SLAP_EVENT_* for public interface that deals
 145  *   with file descriptors and events respectively
 146  *
 147  * - SLAP_<type>_* for private interface; type by now is one of
 148  *   EPOLL, DEVPOLL, SELECT
 149  *
 150  * private interface should not be used in the code.
 151  */
 152 #if defined(HAVE_EPOLL)
 153 /***************************************
 154  * Use epoll infrastructure - epoll(4) *
 155  ***************************************/
 156 # define SLAP_EVENT_FNAME               "epoll"
 157 # define SLAP_EVENTS_ARE_INDEXED        0
 158 # define SLAP_EPOLL_SOCK_IX(s)          (slap_daemon.sd_index[(s)])
 159 # define SLAP_EPOLL_SOCK_EP(s)          (slap_daemon.sd_epolls[SLAP_EPOLL_SOCK_IX(s)])
 160 # define SLAP_EPOLL_SOCK_EV(s)          (SLAP_EPOLL_SOCK_EP(s).events)
 161 # define SLAP_SOCK_IS_ACTIVE(s)         (SLAP_EPOLL_SOCK_IX(s) != -1)
 162 # define SLAP_SOCK_NOT_ACTIVE(s)        (SLAP_EPOLL_SOCK_IX(s) == -1)
 163 # define SLAP_EPOLL_SOCK_IS_SET(s, mode)        (SLAP_EPOLL_SOCK_EV(s) & (mode))
 164
 165 # define SLAP_SOCK_IS_READ(s)           SLAP_EPOLL_SOCK_IS_SET((s), EPOLLIN)
 166 # define SLAP_SOCK_IS_WRITE(s)          SLAP_EPOLL_SOCK_IS_SET((s), EPOLLOUT)
 167
 168 # define SLAP_EPOLL_SOCK_SET(s, mode)   do { \
 169         if ( (SLAP_EPOLL_SOCK_EV(s) & (mode)) != (mode) ) {     \
 170                 SLAP_EPOLL_SOCK_EV(s) |= (mode); \
 171                 epoll_ctl( slap_daemon.sd_epfd, EPOLL_CTL_MOD, (s), \
 172                         &SLAP_EPOLL_SOCK_EP(s) ); \
 173         } \
 174 } while (0)
 175
 176 # define SLAP_EPOLL_SOCK_CLR(s, mode)   do { \
 177         if ( (SLAP_EPOLL_SOCK_EV(s) & (mode)) ) { \
 178                 SLAP_EPOLL_SOCK_EV(s) &= ~(mode);       \
 179                 epoll_ctl( slap_daemon.sd_epfd, EPOLL_CTL_MOD, s, \
 180                         &SLAP_EPOLL_SOCK_EP(s) ); \
 181         } \
 182 } while (0)
 183
 184 # define SLAP_SOCK_SET_READ(s)          SLAP_EPOLL_SOCK_SET(s, EPOLLIN)
 185 # define SLAP_SOCK_SET_WRITE(s)         SLAP_EPOLL_SOCK_SET(s, EPOLLOUT)
 186
 187 # define SLAP_SOCK_CLR_READ(s)          SLAP_EPOLL_SOCK_CLR((s), EPOLLIN)
 188 # define SLAP_SOCK_CLR_WRITE(s)         SLAP_EPOLL_SOCK_CLR((s), EPOLLOUT)
 189
 190 # ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 191 #  define SLAP_SOCK_SET_SUSPEND(s) \
 192         ( slap_daemon.sd_suspend[SLAP_EPOLL_SOCK_IX(s)] = 1 )
 193 #  define SLAP_SOCK_CLR_SUSPEND(s) \
 194         ( slap_daemon.sd_suspend[SLAP_EPOLL_SOCK_IX(s)] = 0 )
 195 #  define SLAP_SOCK_IS_SUSPEND(s) \
 196         ( slap_daemon.sd_suspend[SLAP_EPOLL_SOCK_IX(s)] == 1 )
 197 # endif /* SLAP_LIGHTWEIGHT_DISPATCHER */
 198
 199 # define SLAP_EPOLL_EVENT_CLR(i, mode)  (revents[(i)].events &= ~(mode))
 200
 201 # define SLAP_EVENT_MAX                 slap_daemon.sd_nfds
 202
 203 /* If a Listener address is provided, store that as the epoll data.
 204  * Otherwise, store the address of this socket's slot in the
 205  * index array. If we can't do this add, the system is out of
 206  * resources and we need to shutdown.
 207  */
 208 # define SLAP_SOCK_ADD(s, l)            do { \
 209         int rc; \
 210         SLAP_EPOLL_SOCK_IX((s)) = slap_daemon.sd_nfds; \
 211         SLAP_EPOLL_SOCK_EP((s)).data.ptr = (l) ? (l) : (void *)(&SLAP_EPOLL_SOCK_IX(s)); \
 212         SLAP_EPOLL_SOCK_EV((s)) = EPOLLIN; \
 213         rc = epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_ADD, \
 214                 (s), &SLAP_EPOLL_SOCK_EP((s))); \
 215         if ( rc == 0 ) { \
 216                 slap_daemon.sd_nfds++; \
 217         } else { \
 218                 Debug( LDAP_DEBUG_ANY, \
 219                         "daemon: epoll_ctl(ADD,fd=%d) failed, errno=%d, shutting down\n", \
 220                         s, errno, 0 ); \
 221                 slapd_shutdown = 2; \
 222         } \
 223 } while (0)
 224
 225 # define SLAP_EPOLL_EV_LISTENER(ptr) \
 226         (((int *)(ptr) >= slap_daemon.sd_index && \
 227         (int *)(ptr) <= &slap_daemon.sd_index[dtblsize]) ? 0 : 1 )
 228
 229 # define SLAP_EPOLL_EV_PTRFD(ptr)               (SLAP_EPOLL_EV_LISTENER(ptr) ? \
 230         ((Listener *)ptr)->sl_sd : (int *)(ptr) - slap_daemon.sd_index)
 231
 232 # define SLAP_SOCK_DEL(s)               do { \
 233         int fd, rc, index = SLAP_EPOLL_SOCK_IX((s)); \
 234         if ( index < 0 ) break; \
 235         rc = epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_DEL, \
 236                 (s), &SLAP_EPOLL_SOCK_EP((s))); \
 237         slap_daemon.sd_epolls[index] = \
 238                 slap_daemon.sd_epolls[slap_daemon.sd_nfds-1]; \
 239         fd = SLAP_EPOLL_EV_PTRFD(slap_daemon.sd_epolls[index].data.ptr); \
 240         slap_daemon.sd_index[fd] = index; \
 241         slap_daemon.sd_index[(s)] = -1; \
 242         slap_daemon.sd_nfds--; \
 243 } while (0)
 244
 245 # define SLAP_EVENT_CLR_READ(i)         SLAP_EPOLL_EVENT_CLR((i), EPOLLIN)
 246 # define SLAP_EVENT_CLR_WRITE(i)        SLAP_EPOLL_EVENT_CLR((i), EPOLLOUT)
 247
 248 # define SLAP_EPOLL_EVENT_CHK(i, mode)  (revents[(i)].events & mode)
 249
 250 # define SLAP_EVENT_IS_READ(i)          SLAP_EPOLL_EVENT_CHK((i), EPOLLIN)
 251 # define SLAP_EVENT_IS_WRITE(i)         SLAP_EPOLL_EVENT_CHK((i), EPOLLOUT)
 252 # define SLAP_EVENT_IS_LISTENER(i)      SLAP_EPOLL_EV_LISTENER(revents[(i)].data.ptr)
 253 # define SLAP_EVENT_LISTENER(i)         ((Listener *)(revents[(i)].data.ptr))
 254
 255 # define SLAP_EVENT_FD(i)               SLAP_EPOLL_EV_PTRFD(revents[(i)].data.ptr)
 256
 257 # define SLAP_SOCK_INIT         do { \
 258         slap_daemon.sd_epolls = ch_calloc(1, \
 259                 ( sizeof(struct epoll_event) * 2 \
 260                         + sizeof(int) ) * dtblsize * 2); \
 261         slap_daemon.sd_index = (int *)&slap_daemon.sd_epolls[ 2 * dtblsize ]; \
 262         slap_daemon.sd_epfd = epoll_create( dtblsize ); \
 263         for ( i = 0; i < dtblsize; i++ ) slap_daemon.sd_index[i] = -1; \
 264 } while (0)
 265
 266 # define SLAP_SOCK_DESTROY              do { \
 267         if ( slap_daemon.sd_epolls != NULL ) { \
 268                 ch_free( slap_daemon.sd_epolls ); \
 269                 slap_daemon.sd_epolls = NULL; \
 270                 slap_daemon.sd_index = NULL; \
 271                 close( slap_daemon.sd_epfd ); \
 272         } \
 273 } while ( 0 )
 274
 275 # define SLAP_EVENT_DECL                struct epoll_event *revents
 276
 277 # define SLAP_EVENT_INIT                do { \
 278         revents = slap_daemon.sd_epolls + dtblsize; \
 279 } while (0)
 280
 281 # define SLAP_EVENT_WAIT(tvp, nsp)      do { \
 282         *(nsp) = epoll_wait( slap_daemon.sd_epfd, revents, \
 283                 dtblsize, (tvp) ? (tvp)->tv_sec * 1000 : -1 ); \
 284 } while (0)
 285
 286 #elif defined(SLAP_X_DEVPOLL) && defined(HAVE_DEVPOLL)
 287
 288 /*************************************************************
 289  * Use Solaris' (>= 2.7) /dev/poll infrastructure - poll(7d) *
 290  *************************************************************/
 291 # define SLAP_EVENT_FNAME               "/dev/poll"
 292 # define SLAP_EVENTS_ARE_INDEXED        0
 293 /*
 294  * - sd_index   is used much like with epoll()
 295  * - sd_l       is maintained as an array containing the address
 296  *              of the listener; the index is the fd itself
 297  * - sd_pollfd  is used to keep track of what data has been
 298  *              registered in /dev/poll
 299  */
 300 # define SLAP_DEVPOLL_SOCK_IX(s)        (slap_daemon.sd_index[(s)])
 301 # define SLAP_DEVPOLL_SOCK_LX(s)        (slap_daemon.sd_l[(s)])
 302 # define SLAP_DEVPOLL_SOCK_EP(s)        (slap_daemon.sd_pollfd[SLAP_DEVPOLL_SOCK_IX((s))])
 303 # define SLAP_DEVPOLL_SOCK_FD(s)        (SLAP_DEVPOLL_SOCK_EP((s)).fd)
 304 # define SLAP_DEVPOLL_SOCK_EV(s)        (SLAP_DEVPOLL_SOCK_EP((s)).events)
 305 # define SLAP_SOCK_IS_ACTIVE(s)         (SLAP_DEVPOLL_SOCK_IX((s)) != -1)
 306 # define SLAP_SOCK_NOT_ACTIVE(s)        (SLAP_DEVPOLL_SOCK_IX((s)) == -1)
 307 # define SLAP_SOCK_IS_SET(s, mode)      (SLAP_DEVPOLL_SOCK_EV((s)) & (mode))
 308
 309 # define SLAP_SOCK_IS_READ(s)           SLAP_SOCK_IS_SET((s), POLLIN)
 310 # define SLAP_SOCK_IS_WRITE(s)          SLAP_SOCK_IS_SET((s), POLLOUT)
 311
 312 /* as far as I understand, any time we need to communicate with the kernel
 313  * about the number and/or properties of a file descriptor we need it to
 314  * wait for, we have to rewrite the whole set */
 315 # define SLAP_DEVPOLL_WRITE_POLLFD(s, pfd, n, what, shdn)       do { \
 316         int rc; \
 317         size_t size = (n) * sizeof( struct pollfd ); \
 318         /* FIXME: use pwrite? */ \
 319         rc = write( slap_daemon.sd_dpfd, (pfd), size ); \
 320         if ( rc != size ) { \
 321                 Debug( LDAP_DEBUG_ANY, "daemon: " SLAP_EVENT_FNAME ": " \
 322                         "%s fd=%d failed errno=%d\n", \
 323                         (what), (s), errno ); \
 324                 if ( (shdn) ) { \
 325                         slapd_shutdown = 2; \
 326                 } \
 327         } \
 328 } while (0)
 329
 330 # define SLAP_DEVPOLL_SOCK_SET(s, mode)         do { \
 331         Debug( LDAP_DEBUG_CONNS, "SLAP_SOCK_SET_%s(%d)=%d\n", \
 332                 (mode) == POLLIN ? "READ" : "WRITE", (s), \
 333                 ( (SLAP_DEVPOLL_SOCK_EV((s)) & (mode)) != (mode) ) ); \
 334         if ( (SLAP_DEVPOLL_SOCK_EV((s)) & (mode)) != (mode) ) { \
 335                 struct pollfd pfd; \
 336                 SLAP_DEVPOLL_SOCK_EV((s)) |= (mode); \
 337                 pfd.fd = SLAP_DEVPOLL_SOCK_FD((s)); \
 338                 pfd.events = /* (mode) */ SLAP_DEVPOLL_SOCK_EV((s)); \
 339                 SLAP_DEVPOLL_WRITE_POLLFD((s), &pfd, 1, "SET", 0); \
 340         } \
 341 } while (0)
 342
 343 # define SLAP_DEVPOLL_SOCK_CLR(s, mode)         do { \
 344         Debug( LDAP_DEBUG_CONNS, "SLAP_SOCK_CLR_%s(%d)=%d\n", \
 345                 (mode) == POLLIN ? "READ" : "WRITE", (s), \
 346                 ( (SLAP_DEVPOLL_SOCK_EV((s)) & (mode)) == (mode) ) ); \
 347         if ((SLAP_DEVPOLL_SOCK_EV((s)) & (mode)) == (mode) ) { \
 348                 struct pollfd pfd[2]; \
 349                 SLAP_DEVPOLL_SOCK_EV((s)) &= ~(mode); \
 350                 pfd[0].fd = SLAP_DEVPOLL_SOCK_FD((s)); \
 351                 pfd[0].events = POLLREMOVE; \
 352                 pfd[1] = SLAP_DEVPOLL_SOCK_EP((s)); \
 353                 SLAP_DEVPOLL_WRITE_POLLFD((s), &pfd[0], 2, "CLR", 0); \
 354         } \
 355 } while (0)
 356
 357 # define SLAP_SOCK_SET_READ(s)          SLAP_DEVPOLL_SOCK_SET(s, POLLIN)
 358 # define SLAP_SOCK_SET_WRITE(s)         SLAP_DEVPOLL_SOCK_SET(s, POLLOUT)
 359
 360 # define SLAP_SOCK_CLR_READ(s)          SLAP_DEVPOLL_SOCK_CLR((s), POLLIN)
 361 # define SLAP_SOCK_CLR_WRITE(s)         SLAP_DEVPOLL_SOCK_CLR((s), POLLOUT)
 362
 363 # ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 364 #  define SLAP_SOCK_SET_SUSPEND(s) \
 365         ( slap_daemon.sd_suspend[SLAP_DEVPOLL_SOCK_IX((s))] = 1 )
 366 #  define SLAP_SOCK_CLR_SUSPEND(s) \
 367         ( slap_daemon.sd_suspend[SLAP_DEVPOLL_SOCK_IX((s))] = 0 )
 368 #  define SLAP_SOCK_IS_SUSPEND(s) \
 369         ( slap_daemon.sd_suspend[SLAP_DEVPOLL_SOCK_IX((s))] == 1 )
 370 # endif /* SLAP_LIGHTWEIGHT_DISPATCHER */
 371
 372 # define SLAP_DEVPOLL_EVENT_CLR(i, mode)        (revents[(i)].events &= ~(mode))
 373
 374 # define SLAP_EVENT_MAX                 slap_daemon.sd_nfds
 375
 376 /* If a Listener address is provided, store that in the sd_l array.
 377  * If we can't do this add, the system is out of resources and we
 378  * need to shutdown.
 379  */
 380 # define SLAP_SOCK_ADD(s, l)            do { \
 381         Debug( LDAP_DEBUG_CONNS, "SLAP_SOCK_ADD(%d, %p)\n", (s), (l), 0 ); \
 382         SLAP_DEVPOLL_SOCK_IX((s)) = slap_daemon.sd_nfds; \
 383         SLAP_DEVPOLL_SOCK_LX((s)) = (l); \
 384         SLAP_DEVPOLL_SOCK_FD((s)) = (s); \
 385         SLAP_DEVPOLL_SOCK_EV((s)) = POLLIN; \
 386         SLAP_DEVPOLL_WRITE_POLLFD((s), &SLAP_DEVPOLL_SOCK_EP((s)), 1, "ADD", 1); \
 387         slap_daemon.sd_nfds++; \
 388 } while (0)
 389
 390 # define SLAP_DEVPOLL_EV_LISTENER(ptr)  ((ptr) != NULL)
 391
 392 # define SLAP_SOCK_DEL(s)               do { \
 393         int fd, index = SLAP_DEVPOLL_SOCK_IX((s)); \
 394         Debug( LDAP_DEBUG_CONNS, "SLAP_SOCK_DEL(%d)\n", (s), 0, 0 ); \
 395         if ( index < 0 ) break; \
 396         if ( index < slap_daemon.sd_nfds - 1 ) { \
 397                 struct pollfd pfd = slap_daemon.sd_pollfd[index]; \
 398                 fd = slap_daemon.sd_pollfd[slap_daemon.sd_nfds - 1].fd; \
 399                 slap_daemon.sd_pollfd[index] = slap_daemon.sd_pollfd[slap_daemon.sd_nfds - 1]; \
 400                 slap_daemon.sd_pollfd[slap_daemon.sd_nfds - 1] = pfd; \
 401                 slap_daemon.sd_index[fd] = index; \
 402         } \
 403         slap_daemon.sd_index[(s)] = -1; \
 404         slap_daemon.sd_pollfd[slap_daemon.sd_nfds - 1].events = POLLREMOVE; \
 405         SLAP_DEVPOLL_WRITE_POLLFD((s), &slap_daemon.sd_pollfd[slap_daemon.sd_nfds - 1], 1, "DEL", 0); \
 406         slap_daemon.sd_pollfd[slap_daemon.sd_nfds - 1].events = 0; \
 407         slap_daemon.sd_nfds--; \
 408 } while (0)
 409
 410 # define SLAP_EVENT_CLR_READ(i)         SLAP_DEVPOLL_EVENT_CLR((i), POLLIN)
 411 # define SLAP_EVENT_CLR_WRITE(i)        SLAP_DEVPOLL_EVENT_CLR((i), POLLOUT)
 412
 413 # define SLAP_DEVPOLL_EVENT_CHK(i, mode)        (revents[(i)].events & (mode))
 414
 415 # define SLAP_EVENT_FD(i)               (revents[(i)].fd)
 416
 417 # define SLAP_EVENT_IS_READ(i)          SLAP_DEVPOLL_EVENT_CHK((i), POLLIN)
 418 # define SLAP_EVENT_IS_WRITE(i)         SLAP_DEVPOLL_EVENT_CHK((i), POLLOUT)
 419 # define SLAP_EVENT_IS_LISTENER(i)      SLAP_DEVPOLL_EV_LISTENER(SLAP_DEVPOLL_SOCK_LX(SLAP_EVENT_FD((i))))
 420 # define SLAP_EVENT_LISTENER(i)         SLAP_DEVPOLL_SOCK_LX(SLAP_EVENT_FD((i)))
 421
 422 # define SLAP_SOCK_INIT         do { \
 423         slap_daemon.sd_pollfd = ch_calloc( 1, \
 424                 ( sizeof(struct pollfd) * 2 \
 425                         + sizeof( int ) \
 426                         + sizeof( Listener * ) ) * dtblsize ); \
 427         slap_daemon.sd_index = (int *)&slap_daemon.sd_pollfd[ 2 * dtblsize ]; \
 428         slap_daemon.sd_l = (Listener **)&slap_daemon.sd_index[ dtblsize ]; \
 429         slap_daemon.sd_dpfd = open( SLAP_EVENT_FNAME, O_RDWR ); \
 430         if ( slap_daemon.sd_dpfd == -1 ) { \
 431                 Debug( LDAP_DEBUG_ANY, "daemon: " SLAP_EVENT_FNAME ": " \
 432                         "open(\"" SLAP_EVENT_FNAME "\") failed errno=%d\n", \
 433                         errno, 0, 0 ); \
 434                 SLAP_SOCK_DESTROY; \
 435                 return -1; \
 436         } \
 437         for ( i = 0; i < dtblsize; i++ ) { \
 438                 slap_daemon.sd_pollfd[i].fd = -1; \
 439                 slap_daemon.sd_index[i] = -1; \
 440         } \
 441 } while (0)
 442
 443 # define SLAP_SOCK_DESTROY              do { \
 444         if ( slap_daemon.sd_pollfd != NULL ) { \
 445                 ch_free( slap_daemon.sd_pollfd ); \
 446                 slap_daemon.sd_pollfd = NULL; \
 447                 slap_daemon.sd_index = NULL; \
 448                 slap_daemon.sd_l = NULL; \
 449                 close( slap_daemon.sd_dpfd ); \
 450         } \
 451 } while ( 0 )
 452
 453 # define SLAP_EVENT_DECL                struct pollfd *revents
 454
 455 # define SLAP_EVENT_INIT                do { \
 456         revents = &slap_daemon.sd_pollfd[ dtblsize ]; \
 457 } while (0)
 458
 459 # define SLAP_EVENT_WAIT(tvp, nsp)      do { \
 460         struct dvpoll           sd_dvpoll; \
 461         sd_dvpoll.dp_timeout = (tvp) ? (tvp)->tv_sec * 1000 : -1; \
 462         sd_dvpoll.dp_nfds = dtblsize; \
 463         sd_dvpoll.dp_fds = revents; \
 464         *(nsp) = ioctl( slap_daemon.sd_dpfd, DP_POLL, &sd_dvpoll ); \
 465 } while (0)
 466
 467 #else /* ! epoll && ! /dev/poll */
 468
 469 /**************************************
 470  * Use select system call - select(2) *
 471  **************************************/
 472 # define SLAP_EVENT_FNAME               "select"
 473 /* select */
 474
 475 # define SLAP_EVENTS_ARE_INDEXED        1
 476 # define SLAP_EVENT_DECL                fd_set readfds, writefds
 477
 478 # define SLAP_EVENT_INIT                do { \
 479         AC_MEMCPY( &readfds, &slap_daemon.sd_readers, sizeof(fd_set) ); \
 480         if ( nwriters ) { \
 481                 AC_MEMCPY( &writefds, &slap_daemon.sd_writers, sizeof(fd_set) ); \
 482         } else { \
 483                 FD_ZERO( &writefds ); \
 484         } \
 485 } while (0)
 486
 487 # ifdef FD_SETSIZE
 488 #  define SLAP_SELECT_CHK_SETSIZE       do { \
 489         if (dtblsize > FD_SETSIZE) dtblsize = FD_SETSIZE; \
 490 } while (0)
 491 # else /* ! FD_SETSIZE */
 492 #  define SLAP_SELECT_CHK_SETSIZE       do { ; } while (0)
 493 # endif /* ! FD_SETSIZE */
 494
 495 # define SLAP_SOCK_INIT                 do { \
 496         SLAP_SELECT_CHK_SETSIZE; \
 497         FD_ZERO(&slap_daemon.sd_readers); \
 498         FD_ZERO(&slap_daemon.sd_writers); \
 499 } while (0)
 500
 501 # define SLAP_SOCK_DESTROY
 502
 503 # define SLAP_SOCK_IS_ACTIVE(fd)        FD_ISSET((fd), &slap_daemon.sd_actives)
 504 # define SLAP_SOCK_IS_READ(fd)          FD_ISSET((fd), &slap_daemon.sd_readers)
 505 # define SLAP_SOCK_IS_WRITE(fd)         FD_ISSET((fd), &slap_daemon.sd_writers)
 506
 507 # define SLAP_SOCK_NOT_ACTIVE(fd)       (!SLAP_SOCK_IS_ACTIVE(fd) && \
 508          !SLAP_SOCK_IS_READ(fd) && !SLAP_SOCK_IS_WRITE(fd))
 509
 510 # ifdef HAVE_WINSOCK
 511 #  define SLAP_SOCK_SET_READ(fd)        do { \
 512         if (!SLAP_SOCK_IS_READ(fd)) { FD_SET((fd), &slap_daemon.sd_readers); } \
 513 } while (0)
 514 #  define SLAP_SOCK_SET_WRITE(fd)       do { \
 515         if (!SLAP_SOCK_IS_WRITE(fd)) { FD_SET((fd), &slap_daemon.sd_writers); } \
 516 } while (0)
 517
 518 #  define SLAP_SELECT_ADDTEST(s)
 519 #  define SLAP_EVENT_MAX                dtblsize
 520 # else /* ! HAVE_WINSOCK */
 521 #  define SLAP_SOCK_SET_READ(fd)        FD_SET((fd), &slap_daemon.sd_readers)
 522 #  define SLAP_SOCK_SET_WRITE(fd)       FD_SET((fd), &slap_daemon.sd_writers)
 523
 524 #  define SLAP_EVENT_MAX                slap_daemon.sd_nfds
 525 #  define SLAP_SELECT_ADDTEST(s)        do { \
 526         if ((s) >= slap_daemon.sd_nfds) slap_daemon.sd_nfds = (s)+1; \
 527 } while (0)
 528 # endif /* ! HAVE_WINSOCK */
 529
 530 # define SLAP_SOCK_CLR_READ(fd)         FD_CLR((fd), &slap_daemon.sd_readers)
 531 # define SLAP_SOCK_CLR_WRITE(fd)        FD_CLR((fd), &slap_daemon.sd_writers)
 532
 533 # define SLAP_SOCK_ADD(s, l)            do { \
 534         SLAP_SELECT_ADDTEST((s)); \
 535         FD_SET((s), &slap_daemon.sd_actives); \
 536         FD_SET((s), &slap_daemon.sd_readers); \
 537 } while (0)
 538
 539 # define SLAP_SOCK_DEL(s)               do { \
 540         FD_CLR((s), &slap_daemon.sd_actives); \
 541         FD_CLR((s), &slap_daemon.sd_readers); \
 542         FD_CLR((s), &slap_daemon.sd_writers); \
 543 } while (0)
 544
 545 # define SLAP_EVENT_IS_READ(fd)         FD_ISSET((fd), &readfds)
 546 # define SLAP_EVENT_IS_WRITE(fd)        FD_ISSET((fd), &writefds)
 547
 548 # define SLAP_EVENT_CLR_READ(fd)        FD_CLR((fd), &readfds)
 549 # define SLAP_EVENT_CLR_WRITE(fd)       FD_CLR((fd), &writefds)
 550
 551 # define SLAP_EVENT_WAIT(tvp, nsp)      do { \
 552         *(nsp) = select( SLAP_EVENT_MAX, &readfds, \
 553                 nwriters > 0 ? &writefds : NULL, NULL, (tvp) ); \
 554 } while (0)
 555 #endif /* ! epoll && ! /dev/poll */
 556
 557 #ifdef HAVE_SLP
 558 /*
 559  * SLP related functions
 560  */
 561 #include <slp.h>
 562
 563 #define LDAP_SRVTYPE_PREFIX "service:ldap://"
 564 #define LDAPS_SRVTYPE_PREFIX "service:ldaps://"
 565 static char** slapd_srvurls = NULL;
 566 static SLPHandle slapd_hslp = 0;
 567 int slapd_register_slp = 0;
 568 const char *slapd_slp_attrs = NULL;
 569
 570 static SLPError slapd_slp_cookie;
 571
 572 static void
 573 slapd_slp_init( const char* urls )
 574 {
 575         int i;
 576         SLPError err;
 577
 578         slapd_srvurls = ldap_str2charray( urls, " " );
 579
 580         if ( slapd_srvurls == NULL ) return;
 581
 582         /* find and expand INADDR_ANY URLs */
 583         for ( i = 0; slapd_srvurls[i] != NULL; i++ ) {
 584                 if ( strcmp( slapd_srvurls[i], "ldap:///" ) == 0 ) {
 585                         char *host = ldap_pvt_get_fqdn( NULL );
 586                         if ( host != NULL ) {
 587                                 slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i],
 588                                         strlen( host ) +
 589                                         sizeof( LDAP_SRVTYPE_PREFIX ) );
 590                                 strcpy( lutil_strcopy(slapd_srvurls[i],
 591                                         LDAP_SRVTYPE_PREFIX ), host );
 592
 593                                 ch_free( host );
 594                         }
 595
 596                 } else if ( strcmp( slapd_srvurls[i], "ldaps:///" ) == 0 ) {
 597                         char *host = ldap_pvt_get_fqdn( NULL );
 598                         if ( host != NULL ) {
 599                                 slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i],
 600                                         strlen( host ) +
 601                                         sizeof( LDAPS_SRVTYPE_PREFIX ) );
 602                                 strcpy( lutil_strcopy(slapd_srvurls[i],
 603                                         LDAPS_SRVTYPE_PREFIX ), host );
 604
 605                                 ch_free( host );
 606                         }
 607                 }
 608         }
 609
 610         /* open the SLP handle */
 611         err = SLPOpen( "en", 0, &slapd_hslp );
 612
 613         if ( err != SLP_OK ) {
 614                 Debug( LDAP_DEBUG_CONNS, "daemon: SLPOpen() failed with %ld\n",
 615                         (long)err, 0, 0 );
 616         }
 617 }
 618
 619 static void
 620 slapd_slp_deinit( void )
 621 {
 622         if ( slapd_srvurls == NULL ) return;
 623
 624         ldap_charray_free( slapd_srvurls );
 625         slapd_srvurls = NULL;
 626
 627         /* close the SLP handle */
 628         SLPClose( slapd_hslp );
 629 }
 630
 631 static void
 632 slapd_slp_regreport(
 633         SLPHandle       hslp,
 634         SLPError        errcode,
 635         void            *cookie )
 636 {
 637         /* return the error code in the cookie */
 638         *(SLPError*)cookie = errcode;
 639 }
 640
 641 static void
 642 slapd_slp_reg()
 643 {
 644         int i;
 645         SLPError err;
 646
 647         if ( slapd_srvurls == NULL ) return;
 648
 649         for ( i = 0; slapd_srvurls[i] != NULL; i++ ) {
 650                 if ( strncmp( slapd_srvurls[i], LDAP_SRVTYPE_PREFIX,
 651                                 sizeof( LDAP_SRVTYPE_PREFIX ) - 1 ) == 0 ||
 652                         strncmp( slapd_srvurls[i], LDAPS_SRVTYPE_PREFIX,
 653                                 sizeof( LDAPS_SRVTYPE_PREFIX ) - 1 ) == 0 )
 654                 {
 655                         err = SLPReg( slapd_hslp,
 656                                 slapd_srvurls[i],
 657                                 SLP_LIFETIME_MAXIMUM,
 658                                 "ldap",
 659                                 (slapd_slp_attrs) ? slapd_slp_attrs : "",
 660                                 SLP_TRUE,
 661                                 slapd_slp_regreport,
 662                                 &slapd_slp_cookie );
 663
 664                         if ( err != SLP_OK || slapd_slp_cookie != SLP_OK ) {
 665                                 Debug( LDAP_DEBUG_CONNS,
 666                                         "daemon: SLPReg(%s) failed with %ld, cookie = %ld\n",
 667                                         slapd_srvurls[i], (long)err, (long)slapd_slp_cookie );
 668                         }
 669                 }
 670         }
 671 }
 672
 673 static void
 674 slapd_slp_dereg( void )
 675 {
 676         int i;
 677         SLPError err;
 678
 679         if ( slapd_srvurls == NULL ) return;
 680
 681         for ( i = 0; slapd_srvurls[i] != NULL; i++ ) {
 682                 err = SLPDereg( slapd_hslp,
 683                         slapd_srvurls[i],
 684                         slapd_slp_regreport,
 685                         &slapd_slp_cookie );
 686
 687                 if ( err != SLP_OK || slapd_slp_cookie != SLP_OK ) {
 688                         Debug( LDAP_DEBUG_CONNS,
 689                                 "daemon: SLPDereg(%s) failed with %ld, cookie = %ld\n",
 690                                 slapd_srvurls[i], (long)err, (long)slapd_slp_cookie );
 691                 }
 692         }
 693 }
 694 #endif /* HAVE_SLP */
 695
 696 /*
 697  * Add a descriptor to daemon control
 698  *
 699  * If isactive, the descriptor is a live server session and is subject
 700  * to idletimeout control. Otherwise, the descriptor is a passive
 701  * listener or an outbound client session, and not subject to
 702  * idletimeout. The underlying event handler may record the Listener
 703  * argument to differentiate Listener's from real sessions.
 704  */
 705 static void
 706 slapd_add( ber_socket_t s, int isactive, Listener *sl )
 707 {
 708         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 709
 710         assert( SLAP_SOCK_NOT_ACTIVE(s) );
 711
 712         if ( isactive ) slap_daemon.sd_nactives++;
 713
 714         SLAP_SOCK_ADD(s, sl);
 715
 716         Debug( LDAP_DEBUG_CONNS, "daemon: added %ldr%s listener=%p\n",
 717                 (long) s, isactive ? " (active)" : "", (void *)sl );
 718
 719         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 720
 721 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 722         WAKE_LISTENER(1);
 723 #endif /* SLAP_LIGHTWEIGHT_DISPATCHER */
 724 }
 725
 726 /*
 727  * NOTE: unused
 728  */
 729 void
 730 slapd_sd_lock( void )
 731 {
 732         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 733 }
 734
 735 /*
 736  * NOTE: unused
 737  */
 738 void
 739 slapd_sd_unlock( void )
 740 {
 741         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 742 }
 743
 744 /*
 745  * Remove the descriptor from daemon control
 746  */
 747 void
 748 slapd_remove(
 749         ber_socket_t s,
 750         Sockbuf *sb,
 751         int wasactive,
 752         int wake,
 753         int locked )
 754 {
 755         int waswriter;
 756         int wasreader;
 757
 758         if ( !locked )
 759                 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 760
 761         assert( SLAP_SOCK_IS_ACTIVE( s ));
 762
 763         if ( wasactive ) slap_daemon.sd_nactives--;
 764
 765         waswriter = SLAP_SOCK_IS_WRITE(s);
 766         wasreader = SLAP_SOCK_IS_READ(s);
 767
 768         Debug( LDAP_DEBUG_CONNS, "daemon: removing %ld%s%s\n",
 769                 (long) s,
 770                 wasreader ? "r" : "",
 771                 waswriter ? "w" : "" );
 772
 773         if ( waswriter ) slap_daemon.sd_nwriters--;
 774
 775         SLAP_SOCK_DEL(s);
 776
 777         if ( sb )
 778                 ber_sockbuf_free(sb);
 779
 780         /* If we ran out of file descriptors, we dropped a listener from
 781          * the select() loop. Now that we're removing a session from our
 782          * control, we can try to resume a dropped listener to use.
 783          */
 784         if ( emfile ) {
 785                 int i;
 786                 for ( i = 0; slap_listeners[i] != NULL; i++ ) {
 787                         Listener *lr = slap_listeners[i];
 788
 789                         if ( lr->sl_sd == AC_SOCKET_INVALID ) continue;
 790                         if ( lr->sl_sd == s ) continue;
 791                         if ( lr->sl_mute ) {
 792                                 lr->sl_mute = 0;
 793                                 emfile--;
 794                                 break;
 795                         }
 796                 }
 797                 /* Walked the entire list without enabling anything; emfile
 798                  * counter is stale. Reset it.
 799                  */
 800                 if ( slap_listeners[i] == NULL ) emfile = 0;
 801         }
 802         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 803         WAKE_LISTENER(wake || slapd_gentle_shutdown == 2);
 804 }
 805
 806 void
 807 slapd_clr_write( ber_socket_t s, int wake )
 808 {
 809         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 810
 811         assert( SLAP_SOCK_IS_ACTIVE( s ));
 812
 813         if ( SLAP_SOCK_IS_WRITE( s )) {
 814                 SLAP_SOCK_CLR_WRITE( s );
 815                 slap_daemon.sd_nwriters--;
 816         }
 817
 818         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 819         WAKE_LISTENER(wake);
 820 }
 821
 822 void
 823 slapd_set_write( ber_socket_t s, int wake )
 824 {
 825         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 826
 827         assert( SLAP_SOCK_IS_ACTIVE( s ));
 828
 829         if ( !SLAP_SOCK_IS_WRITE( s )) {
 830                 SLAP_SOCK_SET_WRITE( s );
 831                 slap_daemon.sd_nwriters++;
 832         }
 833
 834         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 835         WAKE_LISTENER(wake);
 836 }
 837
 838 int
 839 slapd_clr_read( ber_socket_t s, int wake )
 840 {
 841         int rc = 1;
 842         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 843
 844         if ( SLAP_SOCK_IS_ACTIVE( s )) {
 845                 SLAP_SOCK_CLR_READ( s );
 846                 rc = 0;
 847         }
 848         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 849         if ( !rc )
 850                 WAKE_LISTENER(wake);
 851         return rc;
 852 }
 853
 854 void
 855 slapd_set_read( ber_socket_t s, int wake )
 856 {
 857         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 858
 859         assert( SLAP_SOCK_IS_ACTIVE( s ));
 860         if (!SLAP_SOCK_IS_READ( s )) SLAP_SOCK_SET_READ( s );
 861
 862         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 863         WAKE_LISTENER(wake);
 864 }
 865
 866 static void
 867 slapd_close( ber_socket_t s )
 868 {
 869         Debug( LDAP_DEBUG_CONNS, "daemon: closing %ld\n",
 870                 (long) s, 0, 0 );
 871         tcp_close(s);
 872 }
 873
 874 static void
 875 slap_free_listener_addresses( struct sockaddr **sal )
 876 {
 877         struct sockaddr **sap;
 878         if (sal == NULL) return;
 879         for (sap = sal; *sap != NULL; sap++) ch_free(*sap);
 880         ch_free(sal);
 881 }
 882
 883 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
 884 static int
 885 get_url_perms(
 886         char    **exts,
 887         mode_t  *perms,
 888         int     *crit )
 889 {
 890         int     i;
 891
 892         assert( exts != NULL );
 893         assert( perms != NULL );
 894         assert( crit != NULL );
 895
 896         *crit = 0;
 897         for ( i = 0; exts[ i ]; i++ ) {
 898                 char    *type = exts[ i ];
 899                 int     c = 0;
 900
 901                 if ( type[ 0 ] == '!' ) {
 902                         c = 1;
 903                         type++;
 904                 }
 905
 906                 if ( strncasecmp( type, LDAPI_MOD_URLEXT "=",
 907                         sizeof(LDAPI_MOD_URLEXT "=") - 1 ) == 0 )
 908                 {
 909                         char *value = type + ( sizeof(LDAPI_MOD_URLEXT "=") - 1 );
 910                         mode_t p = 0;
 911                         int j;
 912
 913                         switch (strlen(value)) {
 914                         case 4:
 915                                 /* skip leading '0' */
 916                                 if ( value[ 0 ] != '0' ) return LDAP_OTHER;
 917                                 value++;
 918
 919                         case 3:
 920                                 for ( j = 0; j < 3; j++) {
 921                                         int     v;
 922
 923                                         v = value[ j ] - '0';
 924
 925                                         if ( v < 0 || v > 7 ) return LDAP_OTHER;
 926
 927                                         p |= v << 3*(2-j);
 928                                 }
 929                                 break;
 930
 931                         case 10:
 932                                 for ( j = 1; j < 10; j++ ) {
 933                                         static mode_t   m[] = { 0,
 934                                                 S_IRUSR, S_IWUSR, S_IXUSR,
 935                                                 S_IRGRP, S_IWGRP, S_IXGRP,
 936                                                 S_IROTH, S_IWOTH, S_IXOTH
 937                                         };
 938                                         static char     c[] = "-rwxrwxrwx";
 939
 940                                         if ( value[ j ] == c[ j ] ) {
 941                                                 p |= m[ j ];
 942
 943                                         } else if ( value[ j ] != '-' ) {
 944                                                 return LDAP_OTHER;
 945                                         }
 946                                 }
 947                                 break;
 948
 949                         default:
 950                                 return LDAP_OTHER;
 951                         }
 952
 953                         *crit = c;
 954                         *perms = p;
 955
 956                         return LDAP_SUCCESS;
 957                 }
 958         }
 959
 960         return LDAP_OTHER;
 961 }
 962 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
 963
 964 /* port = 0 indicates AF_LOCAL */
 965 static int
 966 slap_get_listener_addresses(
 967         const char *host,
 968         unsigned short port,
 969         struct sockaddr ***sal )
 970 {
 971         struct sockaddr **sap;
 972
 973 #ifdef LDAP_PF_LOCAL
 974         if ( port == 0 ) {
 975                 *sal = ch_malloc(2 * sizeof(void *));
 976                 if (*sal == NULL) return -1;
 977
 978                 sap = *sal;
 979                 *sap = ch_malloc(sizeof(struct sockaddr_un));
 980                 if (*sap == NULL) goto errexit;
 981                 sap[1] = NULL;
 982
 983                 if ( strlen(host) >
 984                         (sizeof(((struct sockaddr_un *)*sap)->sun_path) - 1) )
 985                 {
 986                         Debug( LDAP_DEBUG_ANY,
 987                                 "daemon: domain socket path (%s) too long in URL",
 988                                 host, 0, 0);
 989                         goto errexit;
 990                 }
 991
 992                 (void)memset( (void *)*sap, '\0', sizeof(struct sockaddr_un) );
 993                 (*sap)->sa_family = AF_LOCAL;
 994                 strcpy( ((struct sockaddr_un *)*sap)->sun_path, host );
 995         } else
 996 #endif /* LDAP_PF_LOCAL */
 997         {
 998 #ifdef HAVE_GETADDRINFO
 999                 struct addrinfo hints, *res, *sai;
1000                 int n, err;
1001                 char serv[7];
1002
1003                 memset( &hints, '\0', sizeof(hints) );
1004                 hints.ai_flags = AI_PASSIVE;
1005                 hints.ai_socktype = SOCK_STREAM;
1006                 hints.ai_family = slap_inet4or6;
1007                 snprintf(serv, sizeof serv, "%d", port);
1008
1009                 if ( (err = getaddrinfo(host, serv, &hints, &res)) ) {
1010                         Debug( LDAP_DEBUG_ANY, "daemon: getaddrinfo() failed: %s\n",
1011                                 AC_GAI_STRERROR(err), 0, 0);
1012                         return -1;
1013                 }
1014
1015                 sai = res;
1016                 for (n=2; (sai = sai->ai_next) != NULL; n++) {
1017                         /* EMPTY */ ;
1018                 }
1019                 *sal = ch_calloc(n, sizeof(void *));
1020                 if (*sal == NULL) return -1;
1021
1022                 sap = *sal;
1023                 *sap = NULL;
1024
1025                 for ( sai=res; sai; sai=sai->ai_next ) {
1026                         if( sai->ai_addr == NULL ) {
1027                                 Debug( LDAP_DEBUG_ANY, "slap_get_listener_addresses: "
1028                                         "getaddrinfo ai_addr is NULL?\n", 0, 0, 0 );
1029                                 freeaddrinfo(res);
1030                                 goto errexit;
1031                         }
1032
1033                         switch (sai->ai_family) {
1034 #  ifdef LDAP_PF_INET6
1035                         case AF_INET6:
1036                                 *sap = ch_malloc(sizeof(struct sockaddr_in6));
1037                                 if (*sap == NULL) {
1038                                         freeaddrinfo(res);
1039                                         goto errexit;
1040                                 }
1041                                 *(struct sockaddr_in6 *)*sap =
1042                                         *((struct sockaddr_in6 *)sai->ai_addr);
1043                                 break;
1044 #  endif /* LDAP_PF_INET6 */
1045                         case AF_INET:
1046                                 *sap = ch_malloc(sizeof(struct sockaddr_in));
1047                                 if (*sap == NULL) {
1048                                         freeaddrinfo(res);
1049                                         goto errexit;
1050                                 }
1051                                 *(struct sockaddr_in *)*sap =
1052                                         *((struct sockaddr_in *)sai->ai_addr);
1053                                 break;
1054                         default:
1055                                 *sap = NULL;
1056                                 break;
1057                         }
1058
1059                         if (*sap != NULL) {
1060                                 (*sap)->sa_family = sai->ai_family;
1061                                 sap++;
1062                                 *sap = NULL;
1063                         }
1064                 }
1065
1066                 freeaddrinfo(res);
1067
1068 #else /* ! HAVE_GETADDRINFO */
1069                 int i, n = 1;
1070                 struct in_addr in;
1071                 struct hostent *he = NULL;
1072
1073                 if ( host == NULL ) {
1074                         in.s_addr = htonl(INADDR_ANY);
1075
1076                 } else if ( !inet_aton( host, &in ) ) {
1077                         he = gethostbyname( host );
1078                         if( he == NULL ) {
1079                                 Debug( LDAP_DEBUG_ANY,
1080                                         "daemon: invalid host %s", host, 0, 0);
1081                                 return -1;
1082                         }
1083                         for (n = 0; he->h_addr_list[n]; n++) /* empty */;
1084                 }
1085
1086                 *sal = ch_malloc((n+1) * sizeof(void *));
1087                 if (*sal == NULL) return -1;
1088
1089                 sap = *sal;
1090                 for ( i = 0; i<n; i++ ) {
1091                         sap[i] = ch_malloc(sizeof(struct sockaddr_in));
1092                         if (*sap == NULL) goto errexit;
1093
1094                         (void)memset( (void *)sap[i], '\0', sizeof(struct sockaddr_in) );
1095                         sap[i]->sa_family = AF_INET;
1096                         ((struct sockaddr_in *)sap[i])->sin_port = htons(port);
1097                         AC_MEMCPY( &((struct sockaddr_in *)sap[i])->sin_addr,
1098                                 he ? (struct in_addr *)he->h_addr_list[i] : &in,
1099                                 sizeof(struct in_addr) );
1100                 }
1101                 sap[i] = NULL;
1102 #endif /* ! HAVE_GETADDRINFO */
1103         }
1104
1105         return 0;
1106
1107 errexit:
1108         slap_free_listener_addresses(*sal);
1109         return -1;
1110 }
1111
1112 static int
1113 slap_open_listener(
1114         const char* url,
1115         int *listeners,
1116         int *cur )
1117 {
1118         int     num, tmp, rc;
1119         Listener l;
1120         Listener *li;
1121         LDAPURLDesc *lud;
1122         unsigned short port;
1123         int err, addrlen = 0;
1124         struct sockaddr **sal, **psal;
1125         int socktype = SOCK_STREAM;     /* default to COTS */
1126
1127 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
1128         /*
1129          * use safe defaults
1130          */
1131         int     crit = 1;
1132 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
1133
1134         rc = ldap_url_parse( url, &lud );
1135
1136         if( rc != LDAP_URL_SUCCESS ) {
1137                 Debug( LDAP_DEBUG_ANY,
1138                         "daemon: listen URL \"%s\" parse error=%d\n",
1139                         url, rc, 0 );
1140                 return rc;
1141         }
1142
1143         l.sl_url.bv_val = NULL;
1144         l.sl_mute = 0;
1145 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1146         l.sl_busy = 0;
1147 #endif /* SLAP_LIGHTWEIGHT_DISPATCHER */
1148
1149 #ifndef HAVE_TLS
1150         if( ldap_pvt_url_scheme2tls( lud->lud_scheme ) ) {
1151                 Debug( LDAP_DEBUG_ANY, "daemon: TLS not supported (%s)\n",
1152                         url, 0, 0 );
1153                 ldap_free_urldesc( lud );
1154                 return -1;
1155         }
1156
1157         if(! lud->lud_port ) lud->lud_port = LDAP_PORT;
1158
1159 #else /* HAVE_TLS */
1160         l.sl_is_tls = ldap_pvt_url_scheme2tls( lud->lud_scheme );
1161
1162         if(! lud->lud_port ) {
1163                 lud->lud_port = l.sl_is_tls ? LDAPS_PORT : LDAP_PORT;
1164         }
1165 #endif /* HAVE_TLS */
1166
1167         port = (unsigned short) lud->lud_port;
1168
1169         tmp = ldap_pvt_url_scheme2proto(lud->lud_scheme);
1170         if ( tmp == LDAP_PROTO_IPC ) {
1171 #ifdef LDAP_PF_LOCAL
1172                 if ( lud->lud_host == NULL || lud->lud_host[0] == '\0' ) {
1173                         err = slap_get_listener_addresses(LDAPI_SOCK, 0, &sal);
1174                 } else {
1175                         err = slap_get_listener_addresses(lud->lud_host, 0, &sal);
1176                 }
1177 #else /* ! LDAP_PF_LOCAL */
1178
1179                 Debug( LDAP_DEBUG_ANY, "daemon: URL scheme not supported: %s",
1180                         url, 0, 0);
1181                 ldap_free_urldesc( lud );
1182                 return -1;
1183 #endif /* ! LDAP_PF_LOCAL */
1184         } else {
1185                 if( lud->lud_host == NULL || lud->lud_host[0] == '\0'
1186                         || strcmp(lud->lud_host, "*") == 0 )
1187                 {
1188                         err = slap_get_listener_addresses(NULL, port, &sal);
1189                 } else {
1190                         err = slap_get_listener_addresses(lud->lud_host, port, &sal);
1191                 }
1192         }
1193
1194 #ifdef LDAP_CONNECTIONLESS
1195         l.sl_is_udp = ( tmp == LDAP_PROTO_UDP );
1196 #endif /* LDAP_CONNECTIONLESS */
1197
1198 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
1199         if ( lud->lud_exts ) {
1200                 err = get_url_perms( lud->lud_exts, &l.sl_perms, &crit );
1201         } else {
1202                 l.sl_perms = S_IRWXU | S_IRWXO;
1203         }
1204 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
1205
1206         ldap_free_urldesc( lud );
1207         if ( err ) return -1;
1208
1209         /* If we got more than one address returned, we need to make space
1210          * for it in the slap_listeners array.
1211          */
1212         for ( num=0; sal[num]; num++ ) /* empty */;
1213         if ( num > 1 ) {
1214                 *listeners += num-1;
1215                 slap_listeners = ch_realloc( slap_listeners,
1216                         (*listeners + 1) * sizeof(Listener *) );
1217         }
1218
1219         psal = sal;
1220         while ( *sal != NULL ) {
1221                 char *af;
1222                 switch( (*sal)->sa_family ) {
1223                 case AF_INET:
1224                         af = "IPv4";
1225                         break;
1226 #ifdef LDAP_PF_INET6
1227                 case AF_INET6:
1228                         af = "IPv6";
1229                         break;
1230 #endif /* LDAP_PF_INET6 */
1231 #ifdef LDAP_PF_LOCAL
1232                 case AF_LOCAL:
1233                         af = "Local";
1234                         break;
1235 #endif /* LDAP_PF_LOCAL */
1236                 default:
1237                         sal++;
1238                         continue;
1239                 }
1240
1241 #ifdef LDAP_CONNECTIONLESS
1242                 if( l.sl_is_udp ) socktype = SOCK_DGRAM;
1243 #endif /* LDAP_CONNECTIONLESS */
1244
1245                 l.sl_sd = socket( (*sal)->sa_family, socktype, 0);
1246                 if ( l.sl_sd == AC_SOCKET_INVALID ) {
1247                         int err = sock_errno();
1248                         Debug( LDAP_DEBUG_ANY,
1249                                 "daemon: %s socket() failed errno=%d (%s)\n",
1250                                 af, err, sock_errstr(err) );
1251                         sal++;
1252                         continue;
1253                 }
1254
1255 #ifndef HAVE_WINSOCK
1256                 if ( l.sl_sd >= dtblsize ) {
1257                         Debug( LDAP_DEBUG_ANY,
1258                                 "daemon: listener descriptor %ld is too great %ld\n",
1259                                 (long) l.sl_sd, (long) dtblsize, 0 );
1260                         tcp_close( l.sl_sd );
1261                         sal++;
1262                         continue;
1263                 }
1264 #endif /* ! HAVE_WINSOCK */
1265
1266 #ifdef LDAP_PF_LOCAL
1267                 if ( (*sal)->sa_family == AF_LOCAL ) {
1268                         unlink( ((struct sockaddr_un *)*sal)->sun_path );
1269                 } else
1270 #endif /* LDAP_PF_LOCAL */
1271                 {
1272 #ifdef SO_REUSEADDR
1273                         /* enable address reuse */
1274                         tmp = 1;
1275                         rc = setsockopt( l.sl_sd, SOL_SOCKET, SO_REUSEADDR,
1276                                 (char *) &tmp, sizeof(tmp) );
1277                         if ( rc == AC_SOCKET_ERROR ) {
1278                                 int err = sock_errno();
1279                                 Debug( LDAP_DEBUG_ANY, "slapd(%ld): "
1280                                         "setsockopt(SO_REUSEADDR) failed errno=%d (%s)\n",
1281                                         (long) l.sl_sd, err, sock_errstr(err) );
1282                         }
1283 #endif /* SO_REUSEADDR */
1284                 }
1285
1286                 switch( (*sal)->sa_family ) {
1287                 case AF_INET:
1288                         addrlen = sizeof(struct sockaddr_in);
1289                         break;
1290 #ifdef LDAP_PF_INET6
1291                 case AF_INET6:
1292 #ifdef IPV6_V6ONLY
1293                         /* Try to use IPv6 sockets for IPv6 only */
1294                         tmp = 1;
1295                         rc = setsockopt( l.sl_sd, IPPROTO_IPV6, IPV6_V6ONLY,
1296                                 (char *) &tmp, sizeof(tmp) );
1297                         if ( rc == AC_SOCKET_ERROR ) {
1298                                 int err = sock_errno();
1299                                 Debug( LDAP_DEBUG_ANY, "slapd(%ld): "
1300                                         "setsockopt(IPV6_V6ONLY) failed errno=%d (%s)\n",
1301                                         (long) l.sl_sd, err, sock_errstr(err) );
1302                         }
1303 #endif /* IPV6_V6ONLY */
1304                         addrlen = sizeof(struct sockaddr_in6);
1305                         break;
1306 #endif /* LDAP_PF_INET6 */
1307
1308 #ifdef LDAP_PF_LOCAL
1309                 case AF_LOCAL:
1310 #ifdef LOCAL_CREDS
1311                         {
1312                                 int one = 1;
1313                                 setsockopt( l.sl_sd, 0, LOCAL_CREDS, &one, sizeof( one ) );
1314                         }
1315 #endif /* LOCAL_CREDS */
1316
1317                         addrlen = sizeof( struct sockaddr_un );
1318                         break;
1319 #endif /* LDAP_PF_LOCAL */
1320                 }
1321
1322 #ifdef LDAP_PF_LOCAL
1323                 /* create socket with all permissions set for those systems
1324                  * that honor permissions on sockets (e.g. Linux); typically,
1325                  * only write is required.  To exploit filesystem permissions,
1326                  * place the socket in a directory and use directory's
1327                  * permissions.  Need write perms to the directory to
1328                  * create/unlink the socket; likely need exec perms to access
1329                  * the socket (ITS#4709) */
1330                 {
1331                         mode_t old_umask;
1332
1333                         if ( (*sal)->sa_family == AF_LOCAL ) {
1334                                 old_umask = umask( 0 );
1335                         }
1336 #endif /* LDAP_PF_LOCAL */
1337                         rc = bind( l.sl_sd, *sal, addrlen );
1338 #ifdef LDAP_PF_LOCAL
1339                         if ( (*sal)->sa_family == AF_LOCAL ) {
1340                                 umask( old_umask );
1341                         }
1342                 }
1343 #endif /* LDAP_PF_LOCAL */
1344                 if ( rc ) {
1345                         err = sock_errno();
1346                         Debug( LDAP_DEBUG_ANY,
1347                                 "daemon: bind(%ld) failed errno=%d (%s)\n",
1348                                 (long)l.sl_sd, err, sock_errstr( err ) );
1349                         tcp_close( l.sl_sd );
1350                         sal++;
1351                         continue;
1352                 }
1353
1354                 switch ( (*sal)->sa_family ) {
1355 #ifdef LDAP_PF_LOCAL
1356                 case AF_LOCAL: {
1357                         char *addr = ((struct sockaddr_un *)*sal)->sun_path;
1358                         l.sl_name.bv_len = strlen(addr) + sizeof("PATH=") - 1;
1359                         l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len + 1 );
1360                         snprintf( l.sl_name.bv_val, l.sl_name.bv_len + 1,
1361                                 "PATH=%s", addr );
1362                 } break;
1363 #endif /* LDAP_PF_LOCAL */
1364
1365                 case AF_INET: {
1366                         char *s;
1367 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
1368                         char addr[INET_ADDRSTRLEN];
1369                         inet_ntop( AF_INET, &((struct sockaddr_in *)*sal)->sin_addr,
1370                                 addr, sizeof(addr) );
1371                         s = addr;
1372 #else /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1373                         s = inet_ntoa( ((struct sockaddr_in *) *sal)->sin_addr );
1374 #endif /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1375                         port = ntohs( ((struct sockaddr_in *)*sal) ->sin_port );
1376                         l.sl_name.bv_val =
1377                                 ber_memalloc( sizeof("IP=255.255.255.255:65535") );
1378                         snprintf( l.sl_name.bv_val, sizeof("IP=255.255.255.255:65535"),
1379                                 "IP=%s:%d",
1380                                  s != NULL ? s : SLAP_STRING_UNKNOWN, port );
1381                         l.sl_name.bv_len = strlen( l.sl_name.bv_val );
1382                 } break;
1383
1384 #ifdef LDAP_PF_INET6
1385                 case AF_INET6: {
1386                         char addr[INET6_ADDRSTRLEN];
1387                         inet_ntop( AF_INET6, &((struct sockaddr_in6 *)*sal)->sin6_addr,
1388                                 addr, sizeof addr);
1389                         port = ntohs( ((struct sockaddr_in6 *)*sal)->sin6_port );
1390                         l.sl_name.bv_len = strlen(addr) + sizeof("IP= 65535");
1391                         l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len );
1392                         snprintf( l.sl_name.bv_val, l.sl_name.bv_len, "IP=%s %d",
1393                                 addr, port );
1394                         l.sl_name.bv_len = strlen( l.sl_name.bv_val );
1395                 } break;
1396 #endif /* LDAP_PF_INET6 */
1397
1398                 default:
1399                         Debug( LDAP_DEBUG_ANY, "daemon: unsupported address family (%d)\n",
1400                                 (int) (*sal)->sa_family, 0, 0 );
1401                         break;
1402                 }
1403
1404                 AC_MEMCPY(&l.sl_sa, *sal, addrlen);
1405                 ber_str2bv( url, 0, 1, &l.sl_url);
1406                 li = ch_malloc( sizeof( Listener ) );
1407                 *li = l;
1408                 slap_listeners[*cur] = li;
1409                 (*cur)++;
1410                 sal++;
1411         }
1412
1413         slap_free_listener_addresses(psal);
1414
1415         if ( l.sl_url.bv_val == NULL ) {
1416                 Debug( LDAP_DEBUG_TRACE,
1417                         "slap_open_listener: failed on %s\n", url, 0, 0 );
1418                 return -1;
1419         }
1420
1421         Debug( LDAP_DEBUG_TRACE, "daemon: listener initialized %s\n",
1422                 l.sl_url.bv_val, 0, 0 );
1423         return 0;
1424 }
1425
1426 static int sockinit(void);
1427 static int sockdestroy(void);
1428
1429 int
1430 slapd_daemon_init( const char *urls )
1431 {
1432         int i, j, n, rc;
1433         char **u;
1434
1435         Debug( LDAP_DEBUG_ARGS, "daemon_init: %s\n",
1436                 urls ? urls : "<null>", 0, 0 );
1437
1438         ldap_pvt_thread_mutex_init( &slap_daemon.sd_mutex );
1439 #ifdef HAVE_TCPD
1440         ldap_pvt_thread_mutex_init( &slap_daemon.sd_tcpd_mutex );
1441 #endif /* TCP Wrappers */
1442
1443         if( (rc = sockinit()) != 0 ) return rc;
1444
1445 #ifdef HAVE_SYSCONF
1446         dtblsize = sysconf( _SC_OPEN_MAX );
1447 #elif HAVE_GETDTABLESIZE
1448         dtblsize = getdtablesize();
1449 #else /* ! HAVE_SYSCONF && ! HAVE_GETDTABLESIZE */
1450         dtblsize = FD_SETSIZE;
1451 #endif /* ! HAVE_SYSCONF && ! HAVE_GETDTABLESIZE */
1452
1453         /* open a pipe (or something equivalent connected to itself).
1454          * we write a byte on this fd whenever we catch a signal. The main
1455          * loop will be select'ing on this socket, and will wake up when
1456          * this byte arrives.
1457          */
1458         if( (rc = lutil_pair( wake_sds )) < 0 ) {
1459                 Debug( LDAP_DEBUG_ANY,
1460                         "daemon: lutil_pair() failed rc=%d\n", rc, 0, 0 );
1461                 return rc;
1462         }
1463
1464         SLAP_SOCK_INIT;
1465
1466         if( urls == NULL ) urls = "ldap:///";
1467
1468         u = ldap_str2charray( urls, " " );
1469
1470         if( u == NULL || u[0] == NULL ) {
1471                 Debug( LDAP_DEBUG_ANY, "daemon_init: no urls (%s) provided.\n",
1472                         urls, 0, 0 );
1473                 if ( u )
1474                         ldap_charray_free( u );
1475                 return -1;
1476         }
1477
1478         for( i=0; u[i] != NULL; i++ ) {
1479                 Debug( LDAP_DEBUG_TRACE, "daemon_init: listen on %s\n",
1480                         u[i], 0, 0 );
1481         }
1482
1483         if( i == 0 ) {
1484                 Debug( LDAP_DEBUG_ANY, "daemon_init: no listeners to open (%s)\n",
1485                         urls, 0, 0 );
1486                 ldap_charray_free( u );
1487                 return -1;
1488         }
1489
1490         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners to open...\n",
1491                 i, 0, 0 );
1492         slap_listeners = ch_malloc( (i+1)*sizeof(Listener *) );
1493
1494         for(n = 0, j = 0; u[n]; n++ ) {
1495                 if ( slap_open_listener( u[n], &i, &j ) ) {
1496                         ldap_charray_free( u );
1497                         return -1;
1498                 }
1499         }
1500         slap_listeners[j] = NULL;
1501
1502         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners opened\n",
1503                 i, 0, 0 );
1504
1505
1506 #ifdef HAVE_SLP
1507         if( slapd_register_slp ) {
1508                 slapd_slp_init( urls );
1509                 slapd_slp_reg();
1510         }
1511 #endif /* HAVE_SLP */
1512
1513         ldap_charray_free( u );
1514
1515         return !i;
1516 }
1517
1518
1519 int
1520 slapd_daemon_destroy( void )
1521 {
1522         connections_destroy();
1523         tcp_close( wake_sds[1] );
1524         tcp_close( wake_sds[0] );
1525         sockdestroy();
1526
1527 #ifdef HAVE_SLP
1528         if( slapd_register_slp ) {
1529                 slapd_slp_dereg();
1530                 slapd_slp_deinit();
1531         }
1532 #endif /* HAVE_SLP */
1533
1534 #ifdef HAVE_TCPD
1535         ldap_pvt_thread_mutex_destroy( &slap_daemon.sd_tcpd_mutex );
1536 #endif /* TCP Wrappers */
1537
1538         ldap_pvt_thread_mutex_destroy( &slap_daemon.sd_mutex );
1539         return 0;
1540 }
1541
1542
1543 static void
1544 close_listeners(
1545         int remove )
1546 {
1547         int l;
1548
1549         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1550                 Listener *lr = slap_listeners[l];
1551
1552                 if ( lr->sl_sd != AC_SOCKET_INVALID ) {
1553                         if ( remove ) slapd_remove( lr->sl_sd, NULL, 0, 0, 0 );
1554
1555 #ifdef LDAP_PF_LOCAL
1556                         if ( lr->sl_sa.sa_addr.sa_family == AF_LOCAL ) {
1557                                 unlink( lr->sl_sa.sa_un_addr.sun_path );
1558                         }
1559 #endif /* LDAP_PF_LOCAL */
1560
1561                         slapd_close( lr->sl_sd );
1562                 }
1563
1564                 if ( lr->sl_url.bv_val ) {
1565                         ber_memfree( lr->sl_url.bv_val );
1566                 }
1567
1568                 if ( lr->sl_name.bv_val ) {
1569                         ber_memfree( lr->sl_name.bv_val );
1570                 }
1571
1572                 free( lr );
1573                 slap_listeners[l] = NULL;
1574         }
1575 }
1576
1577 static int
1578 slap_listener(
1579         Listener *sl )
1580 {
1581         Sockaddr                from;
1582
1583         ber_socket_t s;
1584         socklen_t len = sizeof(from);
1585         long id;
1586         slap_ssf_t ssf = 0;
1587         struct berval authid = BER_BVNULL;
1588 #ifdef SLAPD_RLOOKUPS
1589         char hbuf[NI_MAXHOST];
1590 #endif /* SLAPD_RLOOKUPS */
1591
1592         char    *dnsname = NULL;
1593         char    *peeraddr = NULL;
1594 #ifdef LDAP_PF_LOCAL
1595         char peername[MAXPATHLEN + sizeof("PATH=")];
1596 #elif defined(LDAP_PF_INET6)
1597         char peername[sizeof("IP=ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 65535")];
1598 #else /* ! LDAP_PF_LOCAL && ! LDAP_PF_INET6 */
1599         char peername[sizeof("IP=255.255.255.255:65336")];
1600 #endif /* LDAP_PF_LOCAL */
1601
1602         Debug( LDAP_DEBUG_TRACE,
1603                 ">>> slap_listener(%s)",
1604                 sl->sl_url.bv_val, 0, 0 );
1605
1606         peername[0] = '\0';
1607
1608 #ifdef LDAP_CONNECTIONLESS
1609         if ( sl->sl_is_udp ) return 1;
1610 #endif /* LDAP_CONNECTIONLESS */
1611
1612 #  ifdef LDAP_PF_LOCAL
1613         /* FIXME: apparently accept doesn't fill
1614          * the sun_path sun_path member */
1615         from.sa_un_addr.sun_path[0] = '\0';
1616 #  endif /* LDAP_PF_LOCAL */
1617
1618         s = accept( sl->sl_sd, (struct sockaddr *) &from, &len );
1619
1620 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1621         /* Resume the listener FD to allow concurrent-processing of
1622          * additional incoming connections.
1623          */
1624         sl->sl_busy = 0;
1625         WAKE_LISTENER(1);
1626 #endif /* SLAP_LIGHTWEIGHT_DISPATCHER */
1627
1628         if ( s == AC_SOCKET_INVALID ) {
1629                 int err = sock_errno();
1630
1631                 if(
1632 #ifdef EMFILE
1633                     err == EMFILE ||
1634 #endif /* EMFILE */
1635 #ifdef ENFILE
1636                     err == ENFILE ||
1637 #endif /* ENFILE */
1638                     0 )
1639                 {
1640                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1641                         emfile++;
1642                         /* Stop listening until an existing session closes */
1643                         sl->sl_mute = 1;
1644                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1645                 }
1646
1647                 Debug( LDAP_DEBUG_ANY,
1648                         "daemon: accept(%ld) failed errno=%d (%s)\n",
1649                         (long) sl->sl_sd, err, sock_errstr(err) );
1650                 ldap_pvt_thread_yield();
1651                 return 0;
1652         }
1653
1654 #ifndef HAVE_WINSOCK
1655         /* make sure descriptor number isn't too great */
1656         if ( s >= dtblsize ) {
1657                 Debug( LDAP_DEBUG_ANY,
1658                         "daemon: %ld beyond descriptor table size %ld\n",
1659                         (long) s, (long) dtblsize, 0 );
1660
1661                 slapd_close(s);
1662                 ldap_pvt_thread_yield();
1663                 return 0;
1664         }
1665 #endif /* ! HAVE_WINSOCK */
1666
1667 #ifdef LDAP_DEBUG
1668         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1669         /* newly accepted stream should not be in any of the FD SETS */
1670         assert( SLAP_SOCK_NOT_ACTIVE( s ));
1671         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1672 #endif /* LDAP_DEBUG */
1673
1674 #if defined( SO_KEEPALIVE ) || defined( TCP_NODELAY )
1675 #ifdef LDAP_PF_LOCAL
1676         /* for IPv4 and IPv6 sockets only */
1677         if ( from.sa_addr.sa_family != AF_LOCAL )
1678 #endif /* LDAP_PF_LOCAL */
1679         {
1680                 int rc;
1681                 int tmp;
1682 #ifdef SO_KEEPALIVE
1683                 /* enable keep alives */
1684                 tmp = 1;
1685                 rc = setsockopt( s, SOL_SOCKET, SO_KEEPALIVE,
1686                         (char *) &tmp, sizeof(tmp) );
1687                 if ( rc == AC_SOCKET_ERROR ) {
1688                         int err = sock_errno();
1689                         Debug( LDAP_DEBUG_ANY,
1690                                 "slapd(%ld): setsockopt(SO_KEEPALIVE) failed "
1691                                 "errno=%d (%s)\n", (long) s, err, sock_errstr(err) );
1692                 }
1693 #endif /* SO_KEEPALIVE */
1694 #ifdef TCP_NODELAY
1695                 /* enable no delay */
1696                 tmp = 1;
1697                 rc = setsockopt( s, IPPROTO_TCP, TCP_NODELAY,
1698                         (char *)&tmp, sizeof(tmp) );
1699                 if ( rc == AC_SOCKET_ERROR ) {
1700                         int err = sock_errno();
1701                         Debug( LDAP_DEBUG_ANY,
1702                                 "slapd(%ld): setsockopt(TCP_NODELAY) failed "
1703                                 "errno=%d (%s)\n", (long) s, err, sock_errstr(err) );
1704                 }
1705 #endif /* TCP_NODELAY */
1706         }
1707 #endif /* SO_KEEPALIVE || TCP_NODELAY */
1708
1709         Debug( LDAP_DEBUG_CONNS,
1710                 "daemon: listen=%ld, new connection on %ld\n",
1711                 (long) sl->sl_sd, (long) s, 0 );
1712
1713         switch ( from.sa_addr.sa_family ) {
1714 #  ifdef LDAP_PF_LOCAL
1715         case AF_LOCAL:
1716                 /* FIXME: apparently accept doesn't fill
1717                  * the sun_path sun_path member */
1718                 if ( from.sa_un_addr.sun_path[0] == '\0' ) {
1719                         AC_MEMCPY( from.sa_un_addr.sun_path,
1720                                         sl->sl_sa.sa_un_addr.sun_path,
1721                                         sizeof( from.sa_un_addr.sun_path ) );
1722                 }
1723
1724                 sprintf( peername, "PATH=%s", from.sa_un_addr.sun_path );
1725                 ssf = local_ssf;
1726                 {
1727                         uid_t uid;
1728                         gid_t gid;
1729
1730                         if( getpeereid( s, &uid, &gid ) == 0 ) {
1731                                 authid.bv_val = ch_malloc(
1732                                         STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
1733                                         "cn=peercred,cn=external,cn=auth" ) + 1 );
1734                                 authid.bv_len = sprintf( authid.bv_val,
1735                                         "gidNumber=%d+uidNumber=%d,"
1736                                         "cn=peercred,cn=external,cn=auth",
1737                                         (int) gid, (int) uid );
1738                                 assert( authid.bv_len <=
1739                                         STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
1740                                         "cn=peercred,cn=external,cn=auth" ) );
1741                         }
1742                 }
1743                 dnsname = "local";
1744                 break;
1745 #endif /* LDAP_PF_LOCAL */
1746
1747 #  ifdef LDAP_PF_INET6
1748         case AF_INET6:
1749         if ( IN6_IS_ADDR_V4MAPPED(&from.sa_in6_addr.sin6_addr) ) {
1750                 peeraddr = inet_ntoa( *((struct in_addr *)
1751                                         &from.sa_in6_addr.sin6_addr.s6_addr[12]) );
1752                 sprintf( peername, "IP=%s:%d",
1753                          peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1754                          (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
1755         } else {
1756                 char addr[INET6_ADDRSTRLEN];
1757
1758                 peeraddr = (char *) inet_ntop( AF_INET6,
1759                                       &from.sa_in6_addr.sin6_addr,
1760                                       addr, sizeof addr );
1761                 sprintf( peername, "IP=%s %d",
1762                          peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1763                          (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
1764         }
1765         break;
1766 #  endif /* LDAP_PF_INET6 */
1767
1768         case AF_INET:
1769         peeraddr = inet_ntoa( from.sa_in_addr.sin_addr );
1770         sprintf( peername, "IP=%s:%d",
1771                 peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1772                 (unsigned) ntohs( from.sa_in_addr.sin_port ) );
1773                 break;
1774
1775         default:
1776                 slapd_close(s);
1777                 return 0;
1778         }
1779
1780         if ( ( from.sa_addr.sa_family == AF_INET )
1781 #ifdef LDAP_PF_INET6
1782                 || ( from.sa_addr.sa_family == AF_INET6 )
1783 #endif /* LDAP_PF_INET6 */
1784                 )
1785         {
1786                 dnsname = NULL;
1787 #ifdef SLAPD_RLOOKUPS
1788                 if ( use_reverse_lookup ) {
1789                         char *herr;
1790                         if (ldap_pvt_get_hname( (const struct sockaddr *)&from, len, hbuf,
1791                                 sizeof(hbuf), &herr ) == 0) {
1792                                 ldap_pvt_str2lower( hbuf );
1793                                 dnsname = hbuf;
1794                         }
1795                 }
1796 #endif /* SLAPD_RLOOKUPS */
1797
1798 #ifdef HAVE_TCPD
1799                 {
1800                         int rc;
1801                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_tcpd_mutex );
1802                         rc = hosts_ctl("slapd",
1803                                 dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1804                                 peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1805                                 SLAP_STRING_UNKNOWN );
1806                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_tcpd_mutex );
1807                         if ( !rc ) {
1808                                 /* DENY ACCESS */
1809                                 Statslog( LDAP_DEBUG_STATS,
1810                                         "fd=%ld DENIED from %s (%s)\n",
1811                                         (long) s,
1812                                         dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1813                                         peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1814                                         0, 0 );
1815                                 slapd_close(s);
1816                                 return 0;
1817                         }
1818                 }
1819 #endif /* HAVE_TCPD */
1820         }
1821
1822         id = connection_init(s, sl,
1823                 dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1824                 peername,
1825 #ifdef HAVE_TLS
1826                 sl->sl_is_tls ? CONN_IS_TLS : 0,
1827 #else /* ! HAVE_TLS */
1828                 0,
1829 #endif /* ! HAVE_TLS */
1830                 ssf,
1831                 authid.bv_val ? &authid : NULL );
1832
1833         if( authid.bv_val ) ch_free(authid.bv_val);
1834
1835         if( id < 0 ) {
1836                 Debug( LDAP_DEBUG_ANY,
1837                         "daemon: connection_init(%ld, %s, %s) failed.\n",
1838                         (long) s, peername, sl->sl_name.bv_val );
1839                 slapd_close(s);
1840                 return 0;
1841         }
1842
1843         Statslog( LDAP_DEBUG_STATS,
1844                 "conn=%ld fd=%ld ACCEPT from %s (%s)\n",
1845                 id, (long) s, peername, sl->sl_name.bv_val,
1846                 0 );
1847
1848         return 0;
1849 }
1850
1851 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1852 static void*
1853 slap_listener_thread(
1854         void* ctx,
1855         void* ptr )
1856 {
1857         int             rc;
1858         Listener        *sl = (Listener *)ptr;
1859
1860         rc = slap_listener( sl );
1861
1862         if( rc != LDAP_SUCCESS ) {
1863                 Debug( LDAP_DEBUG_ANY,
1864                         "slap_listener_thread(%s): failed err=%d",
1865                         sl->sl_url.bv_val, rc, 0 );
1866         }
1867
1868         return (void*)NULL;
1869 }
1870
1871 static int
1872 slap_listener_activate(
1873         Listener* sl )
1874 {
1875         int rc;
1876
1877         Debug( LDAP_DEBUG_TRACE, "slap_listener_activate(%d): %s\n",
1878                 sl->sl_sd, sl->sl_busy ? "busy" : "", 0 );
1879
1880         sl->sl_busy++;
1881
1882         rc = ldap_pvt_thread_pool_submit( &connection_pool,
1883                 slap_listener_thread, (void *) sl );
1884
1885         if( rc != 0 ) {
1886                 Debug( LDAP_DEBUG_ANY,
1887                         "listener_activate(%d): submit failed (%d)\n",
1888                         sl->sl_sd, rc, 0 );
1889         }
1890         return rc;
1891 }
1892 #endif /* SLAP_LIGHTWEIGHT_DISPATCHER */
1893
1894 static void *
1895 slapd_daemon_task(
1896         void *ptr )
1897 {
1898         int l;
1899         time_t last_idle_check = 0;
1900         struct timeval idle;
1901         int ebadf = 0;
1902
1903 #define SLAPD_IDLE_CHECK_LIMIT 4
1904
1905         if ( global_idletimeout > 0 ) {
1906                 last_idle_check = slap_get_time();
1907                 /* Set the select timeout.
1908                  * Don't just truncate, preserve the fractions of
1909                  * seconds to prevent sleeping for zero time.
1910                  */
1911                 idle.tv_sec = global_idletimeout / SLAPD_IDLE_CHECK_LIMIT;
1912                 idle.tv_usec = global_idletimeout - \
1913                         ( idle.tv_sec * SLAPD_IDLE_CHECK_LIMIT );
1914                 idle.tv_usec *= 1000000 / SLAPD_IDLE_CHECK_LIMIT;
1915         } else {
1916                 idle.tv_sec = 0;
1917                 idle.tv_usec = 0;
1918         }
1919
1920         slapd_add( wake_sds[0], 0, NULL );
1921
1922         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1923                 if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) continue;
1924
1925 #ifdef LDAP_CONNECTIONLESS
1926                 /* Since this is connectionless, the data port is the
1927                  * listening port. The listen() and accept() calls
1928                  * are unnecessary.
1929                  */
1930                 if ( slap_listeners[l]->sl_is_udp )
1931                         continue;
1932 #endif /* LDAP_CONNECTIONLESS */
1933
1934                 if ( listen( slap_listeners[l]->sl_sd, SLAPD_LISTEN_BACKLOG ) == -1 ) {
1935                         int err = sock_errno();
1936
1937 #ifdef LDAP_PF_INET6
1938                         /* If error is EADDRINUSE, we are trying to listen to INADDR_ANY and
1939                          * we are already listening to in6addr_any, then we want to ignore
1940                          * this and continue.
1941                          */
1942                         if ( err == EADDRINUSE ) {
1943                                 int i;
1944                                 struct sockaddr_in sa = slap_listeners[l]->sl_sa.sa_in_addr;
1945                                 struct sockaddr_in6 sa6;
1946
1947                                 if ( sa.sin_family == AF_INET &&
1948                                      sa.sin_addr.s_addr == htonl(INADDR_ANY) ) {
1949                                         for ( i = 0 ; i < l; i++ ) {
1950                                                 sa6 = slap_listeners[i]->sl_sa.sa_in6_addr;
1951                                                 if ( sa6.sin6_family == AF_INET6 &&
1952                                                      !memcmp( &sa6.sin6_addr, &in6addr_any,
1953                                                                 sizeof(struct in6_addr) ) )
1954                                                 {
1955                                                         break;
1956                                                 }
1957                                         }
1958
1959                                         if ( i < l ) {
1960                                                 /* We are already listening to in6addr_any */
1961                                                 Debug( LDAP_DEBUG_CONNS,
1962                                                         "daemon: Attempt to listen to 0.0.0.0 failed, "
1963                                                         "already listening on ::, assuming IPv4 included\n",
1964                                                         0, 0, 0 );
1965                                                 slapd_close( slap_listeners[l]->sl_sd );
1966                                                 slap_listeners[l]->sl_sd = AC_SOCKET_INVALID;
1967                                                 continue;
1968                                         }
1969                                 }
1970                         }
1971 #endif /* LDAP_PF_INET6 */
1972                         Debug( LDAP_DEBUG_ANY,
1973                                 "daemon: listen(%s, 5) failed errno=%d (%s)\n",
1974                                         slap_listeners[l]->sl_url.bv_val, err,
1975                                         sock_errstr(err) );
1976                         return (void*)-1;
1977                 }
1978
1979 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1980                 /* make the listening socket non-blocking */
1981                 if ( ber_pvt_socket_set_nonblock( slap_listeners[l]->sl_sd, 1 ) < 0 ) {
1982                         Debug( LDAP_DEBUG_ANY, "slapd_daemon_task: "
1983                                 "set nonblocking on a listening socket failed\n",
1984                                 0, 0, 0 );
1985                         slapd_shutdown = 2;
1986                         return (void*)-1;
1987                 }
1988 #endif /* SLAP_LIGHTWEIGHT_DISPATCHER */
1989
1990                 slapd_add( slap_listeners[l]->sl_sd, 0, slap_listeners[l] );
1991         }
1992
1993 #ifdef HAVE_NT_SERVICE_MANAGER
1994         if ( started_event != NULL ) {
1995                 ldap_pvt_thread_cond_signal( &started_event );
1996         }
1997 #endif /* HAVE_NT_SERVICE_MANAGER */
1998
1999 #ifdef SLAP_SEM_LOAD_CONTROL
2000         /*
2001          * initialize count and lazyness of a semaphore
2002          */
2003         (void) ldap_lazy_sem_init(
2004                 SLAP_MAX_WORKER_THREADS + 4 /* max workers + margin */,
2005                 4 /* lazyness */ );
2006 #endif /* SLAP_SEM_LOAD_CONTROL */
2007
2008         /* initialization complete. Here comes the loop. */
2009
2010         while ( !slapd_shutdown ) {
2011                 ber_socket_t            i;
2012                 int                     ns, nwriters;
2013                 int                     at;
2014                 ber_socket_t            nfds;
2015 #if SLAP_EVENTS_ARE_INDEXED
2016                 ber_socket_t            nrfds, nwfds;
2017 #endif /* SLAP_EVENTS_ARE_INDEXED */
2018 #define SLAPD_EBADF_LIMIT 16
2019
2020                 time_t                  now;
2021
2022                 SLAP_EVENT_DECL;
2023
2024                 struct timeval          tv;
2025                 struct timeval          *tvp;
2026
2027                 struct timeval          cat;
2028                 time_t                  tdelta = 1;
2029                 struct re_s*            rtask;
2030
2031                 now = slap_get_time();
2032
2033                 if ( ( global_idletimeout > 0 ) &&
2034                         difftime( last_idle_check +
2035                                 global_idletimeout/SLAPD_IDLE_CHECK_LIMIT, now ) < 0 )
2036                 {
2037                         connections_timeout_idle( now );
2038                         last_idle_check = now;
2039                 }
2040                 tv = idle;
2041
2042 #ifdef SIGHUP
2043                 if ( slapd_gentle_shutdown ) {
2044                         ber_socket_t active;
2045
2046                         if ( slapd_gentle_shutdown == 1 ) {
2047                                 BackendDB *be;
2048                                 Debug( LDAP_DEBUG_ANY, "slapd gentle shutdown\n", 0, 0, 0 );
2049                                 close_listeners( 1 );
2050                                 frontendDB->be_restrictops |= SLAP_RESTRICT_OP_WRITES;
2051                                 LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
2052                                         be->be_restrictops |= SLAP_RESTRICT_OP_WRITES;
2053                                 }
2054                                 slapd_gentle_shutdown = 2;
2055                         }
2056
2057                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
2058                         active = slap_daemon.sd_nactives;
2059                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
2060                         if ( active == 0 ) {
2061                                 slapd_shutdown = 1;
2062                                 break;
2063                         }
2064                 }
2065 #endif /* SIGHUP */
2066                 at = 0;
2067
2068                 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
2069
2070                 nwriters = slap_daemon.sd_nwriters;
2071
2072                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2073                         Listener *lr = slap_listeners[l];
2074
2075                         if ( lr->sl_sd == AC_SOCKET_INVALID ) continue;
2076
2077 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2078                         if ( lr->sl_mute || lr->sl_busy )
2079 #else /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
2080                         if ( lr->sl_mute )
2081 #endif /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
2082                         {
2083                                 SLAP_SOCK_CLR_READ( lr->sl_sd );
2084                         } else {
2085                                 SLAP_SOCK_SET_READ( lr->sl_sd );
2086                         }
2087                 }
2088
2089                 SLAP_EVENT_INIT;
2090
2091                 nfds = SLAP_EVENT_MAX;
2092
2093                 if ( global_idletimeout && slap_daemon.sd_nactives ) at = 1;
2094
2095                 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
2096
2097                 if ( at
2098 #if defined(HAVE_YIELDING_SELECT) || defined(NO_THREADS)
2099                         &&  ( tv.tv_sec || tv.tv_usec )
2100 #endif /* HAVE_YIELDING_SELECT || NO_THREADS */
2101                         )
2102                 {
2103                         tvp = &tv;
2104                 } else {
2105                         tvp = NULL;
2106                 }
2107
2108                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
2109                 rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
2110                 while ( rtask && cat.tv_sec && cat.tv_sec <= now ) {
2111                         if ( ldap_pvt_runqueue_isrunning( &slapd_rq, rtask )) {
2112                                 ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
2113                         } else {
2114                                 ldap_pvt_runqueue_runtask( &slapd_rq, rtask );
2115                                 ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
2116                                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
2117                                 ldap_pvt_thread_pool_submit( &connection_pool,
2118                                         rtask->routine, (void *) rtask );
2119                                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
2120                         }
2121                         rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
2122                 }
2123                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
2124
2125                 if ( rtask && cat.tv_sec ) {
2126                         time_t diff = difftime( cat.tv_sec, now );
2127                         if ( diff == 0 ) diff = tdelta;
2128                         if ( tvp == NULL || diff < tv.tv_sec ) {
2129                                 tv.tv_sec = diff;
2130                                 tv.tv_usec = 0;
2131                                 tvp = &tv;
2132                         }
2133                 }
2134
2135                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2136                         Listener *lr = slap_listeners[l];
2137
2138                         if ( lr->sl_sd == AC_SOCKET_INVALID ) {
2139                                 continue;
2140                         }
2141
2142                         if ( lr->sl_mute ) {
2143                                 Debug( LDAP_DEBUG_CONNS,
2144                                         "daemon: " SLAP_EVENT_FNAME ": "
2145                                         "listen=%d muted\n",
2146                                         lr->sl_sd, 0, 0 );
2147                                 continue;
2148                         }
2149
2150 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2151                         if ( lr->sl_busy ) {
2152                                 Debug( LDAP_DEBUG_CONNS,
2153                                         "daemon: " SLAP_EVENT_FNAME ": "
2154                                         "listen=%d busy\n",
2155                                         lr->sl_sd, 0, 0 );
2156                                 continue;
2157                         }
2158 #endif /* SLAP_LIGHTWEIGHT_DISPATCHER */
2159
2160                         Debug( LDAP_DEBUG_CONNS,
2161                                 "daemon: " SLAP_EVENT_FNAME ": "
2162                                 "listen=%d active_threads=%d tvp=%s\n",
2163                                 lr->sl_sd, at, tvp == NULL ? "NULL" : "zero" );
2164                 }
2165
2166                 SLAP_EVENT_WAIT( tvp, &ns );
2167                 switch ( ns ) {
2168                 case -1: {      /* failure - try again */
2169                                 int err = sock_errno();
2170
2171                                 if ( err != EINTR ) {
2172                                         ebadf++;
2173
2174                                         /* Don't log unless we got it twice in a row */
2175                                         if ( !( ebadf & 1 ) ) {
2176                                                 Debug( LDAP_DEBUG_ANY,
2177                                                         "daemon: "
2178                                                         SLAP_EVENT_FNAME
2179                                                         "failed count %d "
2180                                                         "err (%d): %s\n",
2181                                                         ebadf, err,
2182                                                         sock_errstr( err ) );
2183                                         }
2184                                         if ( ebadf >= SLAPD_EBADF_LIMIT ) {
2185                                                 slapd_shutdown = 2;
2186                                         }
2187                                 }
2188                         }
2189                         continue;
2190
2191                 case 0:         /* timeout - let threads run */
2192                         ebadf = 0;
2193 #ifndef HAVE_YIELDING_SELECT
2194                         Debug( LDAP_DEBUG_CONNS, "daemon: " SLAP_EVENT_FNAME
2195                                 "timeout - yielding\n",
2196                                 0, 0, 0 );
2197
2198                         ldap_pvt_thread_yield();
2199 #endif /* ! HAVE_YIELDING_SELECT */
2200                         continue;
2201
2202                 default:        /* something happened - deal with it */
2203                         if ( slapd_shutdown ) continue;
2204
2205                         ebadf = 0;
2206                         Debug( LDAP_DEBUG_CONNS,
2207                                 "daemon: activity on %d descriptor%s\n",
2208                                 ns, ns != 1 ? "s" : "", 0 );
2209                         /* FALL THRU */
2210                 }
2211
2212 #if SLAP_EVENTS_ARE_INDEXED
2213                 if ( SLAP_EVENT_IS_READ( wake_sds[0] ) ) {
2214                         char c[BUFSIZ];
2215                         SLAP_EVENT_CLR_READ( wake_sds[0] );
2216                         waking = 0;
2217                         tcp_read( wake_sds[0], c, sizeof(c) );
2218                         Debug( LDAP_DEBUG_CONNS, "daemon: waked\n", 0, 0, 0 );
2219                         continue;
2220                 }
2221
2222                 /* The event slot equals the descriptor number - this is
2223                  * true for Unix select and poll. We treat Windows select
2224                  * like this too, even though it's a kludge.
2225                  */
2226                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2227                         int rc;
2228
2229                         if ( ns <= 0 ) break;
2230                         if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) continue;
2231 #ifdef LDAP_CONNECTIONLESS
2232                         if ( slap_listeners[l]->sl_is_udp ) continue;
2233 #endif /* LDAP_CONNECTIONLESS */
2234                         if ( !SLAP_EVENT_IS_READ( slap_listeners[l]->sl_sd ) ) continue;
2235
2236                         /* clear events */
2237                         SLAP_EVENT_CLR_READ( slap_listeners[l]->sl_sd );
2238                         SLAP_EVENT_CLR_WRITE( slap_listeners[l]->sl_sd );
2239                         ns--;
2240
2241 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2242                         rc = slap_listener_activate( slap_listeners[l] );
2243 #else /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
2244                         rc = slap_listener( slap_listeners[l] );
2245 #endif /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
2246                 }
2247
2248                 /* bypass the following tests if no descriptors left */
2249                 if ( ns <= 0 ) {
2250 #ifndef HAVE_YIELDING_SELECT
2251                         ldap_pvt_thread_yield();
2252 #endif /* HAVE_YIELDING_SELECT */
2253                         continue;
2254                 }
2255
2256                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
2257 #ifdef HAVE_WINSOCK
2258                 nrfds = readfds.fd_count;
2259                 nwfds = writefds.fd_count;
2260                 for ( i = 0; i < readfds.fd_count; i++ ) {
2261                         Debug( LDAP_DEBUG_CONNS, " %d%s",
2262                                 readfds.fd_array[i], "r", 0 );
2263                 }
2264                 for ( i = 0; i < writefds.fd_count; i++ ) {
2265                         Debug( LDAP_DEBUG_CONNS, " %d%s",
2266                                 writefds.fd_array[i], "w", 0 );
2267                 }
2268
2269 #else /* ! HAVE_WINSOCK */
2270                 nrfds = 0;
2271                 nwfds = 0;
2272                 for ( i = 0; i < nfds; i++ ) {
2273                         int     r, w;
2274
2275                         r = SLAP_EVENT_IS_READ( i );
2276                         /* writefds was not initialized if nwriters was zero */
2277                         w = nwriters ? SLAP_EVENT_IS_WRITE( i ) : 0;
2278                         if ( r || w ) {
2279                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", i,
2280                                     r ? "r" : "", w ? "w" : "" );
2281                                 if ( r ) {
2282                                         nrfds++;
2283                                         ns--;
2284                                 }
2285                                 if ( w ) {
2286                                         nwfds++;
2287                                         ns--;
2288                                 }
2289                         }
2290                         if ( ns <= 0 ) break;
2291                 }
2292 #endif /* ! HAVE_WINSOCK */
2293                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
2294
2295                 /* loop through the writers */
2296                 for ( i = 0; nwfds > 0; i++ ) {
2297                         ber_socket_t wd;
2298 #ifdef HAVE_WINSOCK
2299                         wd = writefds.fd_array[i];
2300 #else /* ! HAVE_WINSOCK */
2301                         if ( ! SLAP_EVENT_IS_WRITE( i ) ) continue;
2302                         wd = i;
2303 #endif /* ! HAVE_WINSOCK */
2304
2305                         SLAP_EVENT_CLR_WRITE( wd );
2306                         nwfds--;
2307
2308                         Debug( LDAP_DEBUG_CONNS,
2309                                 "daemon: write active on %d\n",
2310                                 wd, 0, 0 );
2311
2312                         /*
2313                          * NOTE: it is possible that the connection was closed
2314                          * and that the stream is now inactive.
2315                          * connection_write() must validate the stream is still
2316                          * active.
2317                          *
2318                          * ITS#4338: if the stream is invalid, there is no need to
2319                          * close it here. It has already been closed in connection.c.
2320                          */
2321                         if ( connection_write( wd ) < 0 ) {
2322                                 if ( SLAP_EVENT_IS_READ( wd ) ) {
2323                                         SLAP_EVENT_CLR_READ( (unsigned) wd );
2324                                         nrfds--;
2325                                 }
2326                         }
2327                 }
2328
2329                 for ( i = 0; nrfds > 0; i++ ) {
2330                         ber_socket_t rd;
2331 #ifdef HAVE_WINSOCK
2332                         rd = readfds.fd_array[i];
2333 #else /* ! HAVE_WINSOCK */
2334                         if ( ! SLAP_EVENT_IS_READ( i ) ) continue;
2335                         rd = i;
2336 #endif /* ! HAVE_WINSOCK */
2337                         SLAP_EVENT_CLR_READ( rd );
2338                         nrfds--;
2339
2340                         Debug ( LDAP_DEBUG_CONNS,
2341                                 "daemon: read activity on %d\n", rd, 0, 0 );
2342                         /*
2343                          * NOTE: it is possible that the connection was closed
2344                          * and that the stream is now inactive.
2345                          * connection_read() must valid the stream is still
2346                          * active.
2347                          */
2348
2349 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2350                         connection_read_activate( rd );
2351 #else /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
2352                         connection_read( rd );
2353 #endif /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
2354                 }
2355 #else   /* !SLAP_EVENTS_ARE_INDEXED */
2356         /* FIXME */
2357         /* The events are returned in an arbitrary list. This is true
2358          * for /dev/poll, epoll and kqueue. In order to prioritize things
2359          * so that we can handle wake_sds first, listeners second, and then
2360          * all other connections last (as we do for select), we would need
2361          * to use multiple event handles and cascade them.
2362          *
2363          * That seems like a bit of hassle. So the wake_sds check has been
2364          * skipped. For epoll and kqueue we can associate arbitrary data with
2365          * an event, so we could use pointers to the listener structure
2366          * instead of just the file descriptor. For /dev/poll we have to
2367          * search the listeners array for a matching descriptor.
2368          *
2369          * We now handle wake events when we see them; they are not given
2370          * higher priority.
2371          */
2372 #ifdef LDAP_DEBUG
2373                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
2374
2375                 for ( i = 0; i < ns; i++ ) {
2376                         int     r, w;
2377
2378                         /* Don't log listener events */
2379                         if ( SLAP_EVENT_IS_LISTENER( i )
2380 #ifdef LDAP_CONNECTIONLESS
2381                                 && !( (SLAP_EVENT_LISTENER( i ))->sl_is_udp )
2382 #endif /* LDAP_CONNECTIONLESS */
2383                                 )
2384                         {
2385                                 continue;
2386                         }
2387
2388                         /* Don't log internal wake events */
2389                         if ( SLAP_EVENT_FD( i ) == wake_sds[0] ) continue;
2390
2391                         r = SLAP_EVENT_IS_READ( i );
2392                         w = SLAP_EVENT_IS_WRITE( i );
2393                         if ( r || w ) {
2394                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", SLAP_EVENT_FD(i),
2395                                     r ? "r" : "", w ? "w" : "" );
2396                         }
2397                 }
2398                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
2399 #endif /* LDAP_DEBUG */
2400
2401                 for ( i = 0; i < ns; i++ ) {
2402                         int rc = 1, fd;
2403
2404                         if ( SLAP_EVENT_IS_LISTENER( i ) ) {
2405 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2406                                 rc = slap_listener_activate( SLAP_EVENT_LISTENER( i ) );
2407 #else /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
2408                                 rc = slap_listener( SLAP_EVENT_LISTENER( i ) );
2409 #endif /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
2410                         }
2411
2412                         /* If we found a regular listener, rc is now zero, and we
2413                          * can skip the data portion. But if it was a UDP listener
2414                          * then rc is still 1, and we want to handle the data.
2415                          */
2416                         if ( rc ) {
2417                                 fd = SLAP_EVENT_FD( i );
2418
2419                                 /* Handle wake events */
2420                                 if ( fd == wake_sds[0] ) {
2421                                         char c[BUFSIZ];
2422                                         waking = 0;
2423                                         tcp_read( wake_sds[0], c, sizeof(c) );
2424                                         break;
2425                                 }
2426
2427                                 if ( SLAP_EVENT_IS_WRITE( i ) ) {
2428                                         Debug( LDAP_DEBUG_CONNS,
2429                                                 "daemon: write active on %d\n",
2430                                                 fd, 0, 0 );
2431
2432                                         SLAP_EVENT_CLR_WRITE( i );
2433
2434                                         /*
2435                                          * NOTE: it is possible that the connection was closed
2436                                          * and that the stream is now inactive.
2437                                          * connection_write() must valid the stream is still
2438                                          * active.
2439                                          */
2440                                         if ( connection_write( fd ) < 0 ) {
2441                                                 continue;
2442                                         }
2443                                 }
2444                                 /* If event is a read */
2445                                 if ( SLAP_EVENT_IS_READ( i ) ) {
2446                                         Debug( LDAP_DEBUG_CONNS,
2447                                                 "daemon: read active on %d\n",
2448                                                 fd, 0, 0 );
2449
2450                                         SLAP_EVENT_CLR_READ( i );
2451 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2452                                         connection_read_activate( fd );
2453 #else /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
2454                                         /*
2455                                          * NOTE: it is possible that the connection was closed
2456                                          * and that the stream is now inactive.
2457                                          * connection_read() must valid the stream is still
2458                                          * active.
2459                                          */
2460                                         connection_read( fd );
2461 #endif /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
2462                                 } else {
2463                                         Debug( LDAP_DEBUG_CONNS,
2464                                                 "daemon: hangup on %d\n", fd, 0, 0 );
2465                                 }
2466                         }
2467                 }
2468 #endif  /* SLAP_EVENTS_ARE_INDEXED */
2469
2470 #ifndef HAVE_YIELDING_SELECT
2471                 ldap_pvt_thread_yield();
2472 #endif /* ! HAVE_YIELDING_SELECT */
2473         }
2474
2475         if ( slapd_shutdown == 1 ) {
2476                 Debug( LDAP_DEBUG_ANY,
2477                         "daemon: shutdown requested and initiated.\n",
2478                         0, 0, 0 );
2479
2480         } else if ( slapd_shutdown == 2 ) {
2481 #ifdef HAVE_NT_SERVICE_MANAGER
2482                         Debug( LDAP_DEBUG_ANY,
2483                                "daemon: shutdown initiated by Service Manager.\n",
2484                                0, 0, 0);
2485 #else /* !HAVE_NT_SERVICE_MANAGER */
2486                         Debug( LDAP_DEBUG_ANY,
2487                                "daemon: abnormal condition, shutdown initiated.\n",
2488                                0, 0, 0 );
2489 #endif /* !HAVE_NT_SERVICE_MANAGER */
2490         } else {
2491                 Debug( LDAP_DEBUG_ANY,
2492                        "daemon: no active streams, shutdown initiated.\n",
2493                        0, 0, 0 );
2494         }
2495
2496         if ( slapd_gentle_shutdown != 2 ) close_listeners ( 0 );
2497
2498         if ( !slapd_gentle_shutdown ) {
2499                 slapd_abrupt_shutdown = 1;
2500                 connections_shutdown();
2501         }
2502
2503         Debug( LDAP_DEBUG_ANY,
2504                 "slapd shutdown: waiting for %d threads to terminate\n",
2505                 ldap_pvt_thread_pool_backload( &connection_pool ), 0, 0 );
2506         ldap_pvt_thread_pool_destroy( &connection_pool, 1 );
2507
2508         free( slap_listeners );
2509         slap_listeners = NULL;
2510
2511         return NULL;
2512 }
2513
2514
2515 #ifdef LDAP_CONNECTIONLESS
2516 static int
2517 connectionless_init( void )
2518 {
2519         int l;
2520
2521         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2522                 Listener *lr = slap_listeners[l];
2523                 long id;
2524
2525                 if ( !lr->sl_is_udp ) {
2526                         continue;
2527                 }
2528
2529                 id = connection_init( lr->sl_sd, lr, "", "",
2530                         CONN_IS_UDP, (slap_ssf_t) 0, NULL );
2531
2532                 if ( id < 0 ) {
2533                         Debug( LDAP_DEBUG_TRACE,
2534                                 "connectionless_init: failed on %s (%d)\n",
2535                                 lr->sl_url, lr->sl_sd, 0 );
2536                         return -1;
2537                 }
2538                 lr->sl_is_udp++;
2539         }
2540
2541         return 0;
2542 }
2543 #endif /* LDAP_CONNECTIONLESS */
2544
2545 int
2546 slapd_daemon( void )
2547 {
2548         int rc;
2549
2550         connections_init();
2551 #ifdef LDAP_CONNECTIONLESS
2552         connectionless_init();
2553 #endif /* LDAP_CONNECTIONLESS */
2554
2555 #define SLAPD_LISTENER_THREAD 1
2556 #if defined( SLAPD_LISTENER_THREAD )
2557         {
2558                 ldap_pvt_thread_t       listener_tid;
2559
2560                 /* listener as a separate THREAD */
2561                 rc = ldap_pvt_thread_create( &listener_tid,
2562                         0, slapd_daemon_task, NULL );
2563
2564                 if ( rc != 0 ) {
2565                         Debug( LDAP_DEBUG_ANY,
2566                         "listener ldap_pvt_thread_create failed (%d)\n", rc, 0, 0 );
2567                         return rc;
2568                 }
2569
2570                 /* wait for the listener thread to complete */
2571                 ldap_pvt_thread_join( listener_tid, (void *)NULL );
2572         }
2573 #else /* ! SLAPD_LISTENER_THREAD */
2574         /* experimental code */
2575         slapd_daemon_task( NULL );
2576 #endif /* ! SLAPD_LISTENER_THREAD */
2577
2578         return 0;
2579 }
2580
2581 static int
2582 sockinit( void )
2583 {
2584 #if defined( HAVE_WINSOCK2 )
2585         WORD wVersionRequested;
2586         WSADATA wsaData;
2587         int err;
2588
2589         wVersionRequested = MAKEWORD( 2, 0 );
2590
2591         err = WSAStartup( wVersionRequested, &wsaData );
2592         if ( err != 0 ) {
2593                 /* Tell the user that we couldn't find a usable */
2594                 /* WinSock DLL.                                  */
2595                 return -1;
2596         }
2597
2598         /* Confirm that the WinSock DLL supports 2.0.*/
2599         /* Note that if the DLL supports versions greater    */
2600         /* than 2.0 in addition to 2.0, it will still return */
2601         /* 2.0 in wVersion since that is the version we      */
2602         /* requested.                                        */
2603
2604         if ( LOBYTE( wsaData.wVersion ) != 2 ||
2605                 HIBYTE( wsaData.wVersion ) != 0 )
2606         {
2607             /* Tell the user that we couldn't find a usable */
2608             /* WinSock DLL.                                  */
2609             WSACleanup();
2610             return -1;
2611         }
2612
2613         /* The WinSock DLL is acceptable. Proceed. */
2614 #elif defined( HAVE_WINSOCK )
2615         WSADATA wsaData;
2616         if ( WSAStartup( 0x0101, &wsaData ) != 0 ) return -1;
2617 #endif /* ! HAVE_WINSOCK2 && ! HAVE_WINSOCK */
2618
2619         return 0;
2620 }
2621
2622 static int
2623 sockdestroy( void )
2624 {
2625 #if defined( HAVE_WINSOCK2 ) || defined( HAVE_WINSOCK )
2626         WSACleanup();
2627 #endif /* HAVE_WINSOCK2 || HAVE_WINSOCK */
2628         SLAP_SOCK_DESTROY;
2629
2630         return 0;
2631 }
2632
2633 RETSIGTYPE
2634 slap_sig_shutdown( int sig )
2635 {
2636 #if 0
2637         Debug(LDAP_DEBUG_TRACE, "slap_sig_shutdown: signal %d\n", sig, 0, 0);
2638 #endif
2639
2640         /*
2641          * If the NT Service Manager is controlling the server, we don't
2642          * want SIGBREAK to kill the server. For some strange reason,
2643          * SIGBREAK is generated when a user logs out.
2644          */
2645
2646 #if HAVE_NT_SERVICE_MANAGER && SIGBREAK
2647         if (is_NT_Service && sig == SIGBREAK) {
2648                 /* empty */;
2649         } else
2650 #endif /* HAVE_NT_SERVICE_MANAGER && SIGBREAK */
2651 #ifdef SIGHUP
2652         if (sig == SIGHUP && global_gentlehup && slapd_gentle_shutdown == 0) {
2653                 slapd_gentle_shutdown = 1;
2654         } else
2655 #endif /* SIGHUP */
2656         {
2657                 slapd_shutdown = 1;
2658         }
2659
2660         WAKE_LISTENER(1);
2661
2662         /* reinstall self */
2663         (void) SIGNAL_REINSTALL( sig, slap_sig_shutdown );
2664 }
2665
2666 RETSIGTYPE
2667 slap_sig_wake( int sig )
2668 {
2669         WAKE_LISTENER(1);
2670
2671         /* reinstall self */
2672         (void) SIGNAL_REINSTALL( sig, slap_sig_wake );
2673 }
2674
2675
2676 void
2677 slapd_add_internal( ber_socket_t s, int isactive )
2678 {
2679         slapd_add( s, isactive, NULL );
2680 }
2681
2682 Listener **
2683 slapd_get_listeners( void )
2684 {
2685         return slap_listeners;
2686 }
2687
2688 void
2689 slap_wake_listener()
2690 {
2691         WAKE_LISTENER(1);
2692 }