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 1998-2007 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_actives); \
 498         FD_ZERO(&slap_daemon.sd_readers); \
 499         FD_ZERO(&slap_daemon.sd_writers); \
 500 } while (0)
 501
 502 # define SLAP_SOCK_DESTROY
 503
 504 # define SLAP_SOCK_IS_ACTIVE(fd)        FD_ISSET((fd), &slap_daemon.sd_actives)
 505 # define SLAP_SOCK_IS_READ(fd)          FD_ISSET((fd), &slap_daemon.sd_readers)
 506 # define SLAP_SOCK_IS_WRITE(fd)         FD_ISSET((fd), &slap_daemon.sd_writers)
 507
 508 # define SLAP_SOCK_NOT_ACTIVE(fd)       (!SLAP_SOCK_IS_ACTIVE(fd) && \
 509          !SLAP_SOCK_IS_READ(fd) && !SLAP_SOCK_IS_WRITE(fd))
 510
 511 # ifdef HAVE_WINSOCK
 512 #  define SLAP_SOCK_SET_READ(fd)        do { \
 513         if (!SLAP_SOCK_IS_READ(fd)) { FD_SET((fd), &slap_daemon.sd_readers); } \
 514 } while (0)
 515 #  define SLAP_SOCK_SET_WRITE(fd)       do { \
 516         if (!SLAP_SOCK_IS_WRITE(fd)) { FD_SET((fd), &slap_daemon.sd_writers); } \
 517 } while (0)
 518
 519 #  define SLAP_SELECT_ADDTEST(s)
 520 #  define SLAP_EVENT_MAX                dtblsize
 521 # else /* ! HAVE_WINSOCK */
 522 #  define SLAP_SOCK_SET_READ(fd)        FD_SET((fd), &slap_daemon.sd_readers)
 523 #  define SLAP_SOCK_SET_WRITE(fd)       FD_SET((fd), &slap_daemon.sd_writers)
 524
 525 #  define SLAP_EVENT_MAX                slap_daemon.sd_nfds
 526 #  define SLAP_SELECT_ADDTEST(s)        do { \
 527         if ((s) >= slap_daemon.sd_nfds) slap_daemon.sd_nfds = (s)+1; \
 528 } while (0)
 529 # endif /* ! HAVE_WINSOCK */
 530
 531 # define SLAP_SOCK_CLR_READ(fd)         FD_CLR((fd), &slap_daemon.sd_readers)
 532 # define SLAP_SOCK_CLR_WRITE(fd)        FD_CLR((fd), &slap_daemon.sd_writers)
 533
 534 # define SLAP_SOCK_ADD(s, l)            do { \
 535         SLAP_SELECT_ADDTEST((s)); \
 536         FD_SET((s), &slap_daemon.sd_actives); \
 537         FD_SET((s), &slap_daemon.sd_readers); \
 538 } while (0)
 539
 540 # define SLAP_SOCK_DEL(s)               do { \
 541         FD_CLR((s), &slap_daemon.sd_actives); \
 542         FD_CLR((s), &slap_daemon.sd_readers); \
 543         FD_CLR((s), &slap_daemon.sd_writers); \
 544 } while (0)
 545
 546 # define SLAP_EVENT_IS_READ(fd)         FD_ISSET((fd), &readfds)
 547 # define SLAP_EVENT_IS_WRITE(fd)        FD_ISSET((fd), &writefds)
 548
 549 # define SLAP_EVENT_CLR_READ(fd)        FD_CLR((fd), &readfds)
 550 # define SLAP_EVENT_CLR_WRITE(fd)       FD_CLR((fd), &writefds)
 551
 552 # define SLAP_EVENT_WAIT(tvp, nsp)      do { \
 553         *(nsp) = select( SLAP_EVENT_MAX, &readfds, \
 554                 nwriters > 0 ? &writefds : NULL, NULL, (tvp) ); \
 555 } while (0)
 556 #endif /* ! epoll && ! /dev/poll */
 557
 558 #ifdef HAVE_SLP
 559 /*
 560  * SLP related functions
 561  */
 562 #include <slp.h>
 563
 564 #define LDAP_SRVTYPE_PREFIX "service:ldap://"
 565 #define LDAPS_SRVTYPE_PREFIX "service:ldaps://"
 566 static char** slapd_srvurls = NULL;
 567 static SLPHandle slapd_hslp = 0;
 568 int slapd_register_slp = 0;
 569 const char *slapd_slp_attrs = NULL;
 570
 571 static SLPError slapd_slp_cookie;
 572
 573 static void
 574 slapd_slp_init( const char* urls )
 575 {
 576         int i;
 577         SLPError err;
 578
 579         slapd_srvurls = ldap_str2charray( urls, " " );
 580
 581         if ( slapd_srvurls == NULL ) return;
 582
 583         /* find and expand INADDR_ANY URLs */
 584         for ( i = 0; slapd_srvurls[i] != NULL; i++ ) {
 585                 if ( strcmp( slapd_srvurls[i], "ldap:///" ) == 0 ) {
 586                         slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i],
 587                                 strlen( global_host ) +
 588                                 sizeof( LDAP_SRVTYPE_PREFIX ) );
 589                         strcpy( lutil_strcopy(slapd_srvurls[i],
 590                                 LDAP_SRVTYPE_PREFIX ), global_host );
 591                 } else if ( strcmp( slapd_srvurls[i], "ldaps:///" ) == 0 ) {
 592                         slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i],
 593                                 strlen( global_host ) +
 594                                 sizeof( LDAPS_SRVTYPE_PREFIX ) );
 595                         strcpy( lutil_strcopy(slapd_srvurls[i],
 596                                 LDAPS_SRVTYPE_PREFIX ), global_host );
 597                 }
 598         }
 599
 600         /* open the SLP handle */
 601         err = SLPOpen( "en", 0, &slapd_hslp );
 602
 603         if ( err != SLP_OK ) {
 604                 Debug( LDAP_DEBUG_CONNS, "daemon: SLPOpen() failed with %ld\n",
 605                         (long)err, 0, 0 );
 606         }
 607 }
 608
 609 static void
 610 slapd_slp_deinit( void )
 611 {
 612         if ( slapd_srvurls == NULL ) return;
 613
 614         ldap_charray_free( slapd_srvurls );
 615         slapd_srvurls = NULL;
 616
 617         /* close the SLP handle */
 618         SLPClose( slapd_hslp );
 619 }
 620
 621 static void
 622 slapd_slp_regreport(
 623         SLPHandle       hslp,
 624         SLPError        errcode,
 625         void            *cookie )
 626 {
 627         /* return the error code in the cookie */
 628         *(SLPError*)cookie = errcode;
 629 }
 630
 631 static void
 632 slapd_slp_reg()
 633 {
 634         int i;
 635         SLPError err;
 636
 637         if ( slapd_srvurls == NULL ) return;
 638
 639         for ( i = 0; slapd_srvurls[i] != NULL; i++ ) {
 640                 if ( strncmp( slapd_srvurls[i], LDAP_SRVTYPE_PREFIX,
 641                                 sizeof( LDAP_SRVTYPE_PREFIX ) - 1 ) == 0 ||
 642                         strncmp( slapd_srvurls[i], LDAPS_SRVTYPE_PREFIX,
 643                                 sizeof( LDAPS_SRVTYPE_PREFIX ) - 1 ) == 0 )
 644                 {
 645                         err = SLPReg( slapd_hslp,
 646                                 slapd_srvurls[i],
 647                                 SLP_LIFETIME_MAXIMUM,
 648                                 "ldap",
 649                                 (slapd_slp_attrs) ? slapd_slp_attrs : "",
 650                                 SLP_TRUE,
 651                                 slapd_slp_regreport,
 652                                 &slapd_slp_cookie );
 653
 654                         if ( err != SLP_OK || slapd_slp_cookie != SLP_OK ) {
 655                                 Debug( LDAP_DEBUG_CONNS,
 656                                         "daemon: SLPReg(%s) failed with %ld, cookie = %ld\n",
 657                                         slapd_srvurls[i], (long)err, (long)slapd_slp_cookie );
 658                         }
 659                 }
 660         }
 661 }
 662
 663 static void
 664 slapd_slp_dereg( void )
 665 {
 666         int i;
 667         SLPError err;
 668
 669         if ( slapd_srvurls == NULL ) return;
 670
 671         for ( i = 0; slapd_srvurls[i] != NULL; i++ ) {
 672                 err = SLPDereg( slapd_hslp,
 673                         slapd_srvurls[i],
 674                         slapd_slp_regreport,
 675                         &slapd_slp_cookie );
 676
 677                 if ( err != SLP_OK || slapd_slp_cookie != SLP_OK ) {
 678                         Debug( LDAP_DEBUG_CONNS,
 679                                 "daemon: SLPDereg(%s) failed with %ld, cookie = %ld\n",
 680                                 slapd_srvurls[i], (long)err, (long)slapd_slp_cookie );
 681                 }
 682         }
 683 }
 684 #endif /* HAVE_SLP */
 685
 686 /*
 687  * Add a descriptor to daemon control
 688  *
 689  * If isactive, the descriptor is a live server session and is subject
 690  * to idletimeout control. Otherwise, the descriptor is a passive
 691  * listener or an outbound client session, and not subject to
 692  * idletimeout. The underlying event handler may record the Listener
 693  * argument to differentiate Listener's from real sessions.
 694  */
 695 static void
 696 slapd_add( ber_socket_t s, int isactive, Listener *sl )
 697 {
 698         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 699
 700         assert( SLAP_SOCK_NOT_ACTIVE(s) );
 701
 702         if ( isactive ) slap_daemon.sd_nactives++;
 703
 704         SLAP_SOCK_ADD(s, sl);
 705
 706         Debug( LDAP_DEBUG_CONNS, "daemon: added %ldr%s listener=%p\n",
 707                 (long) s, isactive ? " (active)" : "", (void *)sl );
 708
 709         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 710
 711 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 712         WAKE_LISTENER(1);
 713 #endif /* SLAP_LIGHTWEIGHT_DISPATCHER */
 714 }
 715
 716 /*
 717  * NOTE: unused
 718  */
 719 void
 720 slapd_sd_lock( void )
 721 {
 722         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 723 }
 724
 725 /*
 726  * NOTE: unused
 727  */
 728 void
 729 slapd_sd_unlock( void )
 730 {
 731         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 732 }
 733
 734 /*
 735  * Remove the descriptor from daemon control
 736  */
 737 void
 738 slapd_remove(
 739         ber_socket_t s,
 740         Sockbuf *sb,
 741         int wasactive,
 742         int wake,
 743         int locked )
 744 {
 745         int waswriter;
 746         int wasreader;
 747
 748         if ( !locked )
 749                 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 750
 751         assert( SLAP_SOCK_IS_ACTIVE( s ));
 752
 753         if ( wasactive ) slap_daemon.sd_nactives--;
 754
 755         waswriter = SLAP_SOCK_IS_WRITE(s);
 756         wasreader = SLAP_SOCK_IS_READ(s);
 757
 758         Debug( LDAP_DEBUG_CONNS, "daemon: removing %ld%s%s\n",
 759                 (long) s,
 760                 wasreader ? "r" : "",
 761                 waswriter ? "w" : "" );
 762
 763         if ( waswriter ) slap_daemon.sd_nwriters--;
 764
 765         SLAP_SOCK_DEL(s);
 766
 767         if ( sb )
 768                 ber_sockbuf_free(sb);
 769
 770         /* If we ran out of file descriptors, we dropped a listener from
 771          * the select() loop. Now that we're removing a session from our
 772          * control, we can try to resume a dropped listener to use.
 773          */
 774         if ( emfile ) {
 775                 int i;
 776                 for ( i = 0; slap_listeners[i] != NULL; i++ ) {
 777                         Listener *lr = slap_listeners[i];
 778
 779                         if ( lr->sl_sd == AC_SOCKET_INVALID ) continue;
 780                         if ( lr->sl_sd == s ) continue;
 781                         if ( lr->sl_mute ) {
 782                                 lr->sl_mute = 0;
 783                                 emfile--;
 784                                 break;
 785                         }
 786                 }
 787                 /* Walked the entire list without enabling anything; emfile
 788                  * counter is stale. Reset it.
 789                  */
 790                 if ( slap_listeners[i] == NULL ) emfile = 0;
 791         }
 792         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 793         WAKE_LISTENER(wake || slapd_gentle_shutdown == 2);
 794 }
 795
 796 void
 797 slapd_clr_write( ber_socket_t s, int wake )
 798 {
 799         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 800
 801         assert( SLAP_SOCK_IS_ACTIVE( s ));
 802
 803         if ( SLAP_SOCK_IS_WRITE( s )) {
 804                 SLAP_SOCK_CLR_WRITE( s );
 805                 slap_daemon.sd_nwriters--;
 806         }
 807
 808         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 809         WAKE_LISTENER(wake);
 810 }
 811
 812 void
 813 slapd_set_write( ber_socket_t s, int wake )
 814 {
 815         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 816
 817         assert( SLAP_SOCK_IS_ACTIVE( s ));
 818
 819         if ( !SLAP_SOCK_IS_WRITE( s )) {
 820                 SLAP_SOCK_SET_WRITE( s );
 821                 slap_daemon.sd_nwriters++;
 822         }
 823
 824         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 825         WAKE_LISTENER(wake);
 826 }
 827
 828 int
 829 slapd_clr_read( ber_socket_t s, int wake )
 830 {
 831         int rc = 1;
 832         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 833
 834         if ( SLAP_SOCK_IS_ACTIVE( s )) {
 835                 SLAP_SOCK_CLR_READ( s );
 836                 rc = 0;
 837         }
 838         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 839         if ( !rc )
 840                 WAKE_LISTENER(wake);
 841         return rc;
 842 }
 843
 844 void
 845 slapd_set_read( ber_socket_t s, int wake )
 846 {
 847         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 848
 849         assert( SLAP_SOCK_IS_ACTIVE( s ));
 850         if (!SLAP_SOCK_IS_READ( s )) SLAP_SOCK_SET_READ( s );
 851
 852         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 853         WAKE_LISTENER(wake);
 854 }
 855
 856 static void
 857 slapd_close( ber_socket_t s )
 858 {
 859         Debug( LDAP_DEBUG_CONNS, "daemon: closing %ld\n",
 860                 (long) s, 0, 0 );
 861         tcp_close(s);
 862 }
 863
 864 static void
 865 slap_free_listener_addresses( struct sockaddr **sal )
 866 {
 867         struct sockaddr **sap;
 868         if (sal == NULL) return;
 869         for (sap = sal; *sap != NULL; sap++) ch_free(*sap);
 870         ch_free(sal);
 871 }
 872
 873 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
 874 static int
 875 get_url_perms(
 876         char    **exts,
 877         mode_t  *perms,
 878         int     *crit )
 879 {
 880         int     i;
 881
 882         assert( exts != NULL );
 883         assert( perms != NULL );
 884         assert( crit != NULL );
 885
 886         *crit = 0;
 887         for ( i = 0; exts[ i ]; i++ ) {
 888                 char    *type = exts[ i ];
 889                 int     c = 0;
 890
 891                 if ( type[ 0 ] == '!' ) {
 892                         c = 1;
 893                         type++;
 894                 }
 895
 896                 if ( strncasecmp( type, LDAPI_MOD_URLEXT "=",
 897                         sizeof(LDAPI_MOD_URLEXT "=") - 1 ) == 0 )
 898                 {
 899                         char *value = type + ( sizeof(LDAPI_MOD_URLEXT "=") - 1 );
 900                         mode_t p = 0;
 901                         int j;
 902
 903                         switch (strlen(value)) {
 904                         case 4:
 905                                 /* skip leading '0' */
 906                                 if ( value[ 0 ] != '0' ) return LDAP_OTHER;
 907                                 value++;
 908
 909                         case 3:
 910                                 for ( j = 0; j < 3; j++) {
 911                                         int     v;
 912
 913                                         v = value[ j ] - '0';
 914
 915                                         if ( v < 0 || v > 7 ) return LDAP_OTHER;
 916
 917                                         p |= v << 3*(2-j);
 918                                 }
 919                                 break;
 920
 921                         case 10:
 922                                 for ( j = 1; j < 10; j++ ) {
 923                                         static mode_t   m[] = { 0,
 924                                                 S_IRUSR, S_IWUSR, S_IXUSR,
 925                                                 S_IRGRP, S_IWGRP, S_IXGRP,
 926                                                 S_IROTH, S_IWOTH, S_IXOTH
 927                                         };
 928                                         static char     c[] = "-rwxrwxrwx";
 929
 930                                         if ( value[ j ] == c[ j ] ) {
 931                                                 p |= m[ j ];
 932
 933                                         } else if ( value[ j ] != '-' ) {
 934                                                 return LDAP_OTHER;
 935                                         }
 936                                 }
 937                                 break;
 938
 939                         default:
 940                                 return LDAP_OTHER;
 941                         }
 942
 943                         *crit = c;
 944                         *perms = p;
 945
 946                         return LDAP_SUCCESS;
 947                 }
 948         }
 949
 950         return LDAP_OTHER;
 951 }
 952 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
 953
 954 /* port = 0 indicates AF_LOCAL */
 955 static int
 956 slap_get_listener_addresses(
 957         const char *host,
 958         unsigned short port,
 959         struct sockaddr ***sal )
 960 {
 961         struct sockaddr **sap;
 962
 963 #ifdef LDAP_PF_LOCAL
 964         if ( port == 0 ) {
 965                 *sal = ch_malloc(2 * sizeof(void *));
 966                 if (*sal == NULL) return -1;
 967
 968                 sap = *sal;
 969                 *sap = ch_malloc(sizeof(struct sockaddr_un));
 970                 if (*sap == NULL) goto errexit;
 971                 sap[1] = NULL;
 972
 973                 if ( strlen(host) >
 974                         (sizeof(((struct sockaddr_un *)*sap)->sun_path) - 1) )
 975                 {
 976                         Debug( LDAP_DEBUG_ANY,
 977                                 "daemon: domain socket path (%s) too long in URL",
 978                                 host, 0, 0);
 979                         goto errexit;
 980                 }
 981
 982                 (void)memset( (void *)*sap, '\0', sizeof(struct sockaddr_un) );
 983                 (*sap)->sa_family = AF_LOCAL;
 984                 strcpy( ((struct sockaddr_un *)*sap)->sun_path, host );
 985         } else
 986 #endif /* LDAP_PF_LOCAL */
 987         {
 988 #ifdef HAVE_GETADDRINFO
 989                 struct addrinfo hints, *res, *sai;
 990                 int n, err;
 991                 char serv[7];
 992
 993                 memset( &hints, '\0', sizeof(hints) );
 994                 hints.ai_flags = AI_PASSIVE;
 995                 hints.ai_socktype = SOCK_STREAM;
 996                 hints.ai_family = slap_inet4or6;
 997                 snprintf(serv, sizeof serv, "%d", port);
 998
 999                 if ( (err = getaddrinfo(host, serv, &hints, &res)) ) {
1000                         Debug( LDAP_DEBUG_ANY, "daemon: getaddrinfo() failed: %s\n",
1001                                 AC_GAI_STRERROR(err), 0, 0);
1002                         return -1;
1003                 }
1004
1005                 sai = res;
1006                 for (n=2; (sai = sai->ai_next) != NULL; n++) {
1007                         /* EMPTY */ ;
1008                 }
1009                 *sal = ch_calloc(n, sizeof(void *));
1010                 if (*sal == NULL) return -1;
1011
1012                 sap = *sal;
1013                 *sap = NULL;
1014
1015                 for ( sai=res; sai; sai=sai->ai_next ) {
1016                         if( sai->ai_addr == NULL ) {
1017                                 Debug( LDAP_DEBUG_ANY, "slap_get_listener_addresses: "
1018                                         "getaddrinfo ai_addr is NULL?\n", 0, 0, 0 );
1019                                 freeaddrinfo(res);
1020                                 goto errexit;
1021                         }
1022
1023                         switch (sai->ai_family) {
1024 #  ifdef LDAP_PF_INET6
1025                         case AF_INET6:
1026                                 *sap = ch_malloc(sizeof(struct sockaddr_in6));
1027                                 if (*sap == NULL) {
1028                                         freeaddrinfo(res);
1029                                         goto errexit;
1030                                 }
1031                                 *(struct sockaddr_in6 *)*sap =
1032                                         *((struct sockaddr_in6 *)sai->ai_addr);
1033                                 break;
1034 #  endif /* LDAP_PF_INET6 */
1035                         case AF_INET:
1036                                 *sap = ch_malloc(sizeof(struct sockaddr_in));
1037                                 if (*sap == NULL) {
1038                                         freeaddrinfo(res);
1039                                         goto errexit;
1040                                 }
1041                                 *(struct sockaddr_in *)*sap =
1042                                         *((struct sockaddr_in *)sai->ai_addr);
1043                                 break;
1044                         default:
1045                                 *sap = NULL;
1046                                 break;
1047                         }
1048
1049                         if (*sap != NULL) {
1050                                 (*sap)->sa_family = sai->ai_family;
1051                                 sap++;
1052                                 *sap = NULL;
1053                         }
1054                 }
1055
1056                 freeaddrinfo(res);
1057
1058 #else /* ! HAVE_GETADDRINFO */
1059                 int i, n = 1;
1060                 struct in_addr in;
1061                 struct hostent *he = NULL;
1062
1063                 if ( host == NULL ) {
1064                         in.s_addr = htonl(INADDR_ANY);
1065
1066                 } else if ( !inet_aton( host, &in ) ) {
1067                         he = gethostbyname( host );
1068                         if( he == NULL ) {
1069                                 Debug( LDAP_DEBUG_ANY,
1070                                         "daemon: invalid host %s", host, 0, 0);
1071                                 return -1;
1072                         }
1073                         for (n = 0; he->h_addr_list[n]; n++) /* empty */;
1074                 }
1075
1076                 *sal = ch_malloc((n+1) * sizeof(void *));
1077                 if (*sal == NULL) return -1;
1078
1079                 sap = *sal;
1080                 for ( i = 0; i<n; i++ ) {
1081                         sap[i] = ch_malloc(sizeof(struct sockaddr_in));
1082                         if (*sap == NULL) goto errexit;
1083
1084                         (void)memset( (void *)sap[i], '\0', sizeof(struct sockaddr_in) );
1085                         sap[i]->sa_family = AF_INET;
1086                         ((struct sockaddr_in *)sap[i])->sin_port = htons(port);
1087                         AC_MEMCPY( &((struct sockaddr_in *)sap[i])->sin_addr,
1088                                 he ? (struct in_addr *)he->h_addr_list[i] : &in,
1089                                 sizeof(struct in_addr) );
1090                 }
1091                 sap[i] = NULL;
1092 #endif /* ! HAVE_GETADDRINFO */
1093         }
1094
1095         return 0;
1096
1097 errexit:
1098         slap_free_listener_addresses(*sal);
1099         return -1;
1100 }
1101
1102 static int
1103 slap_open_listener(
1104         const char* url,
1105         int *listeners,
1106         int *cur )
1107 {
1108         int     num, tmp, rc;
1109         Listener l;
1110         Listener *li;
1111         LDAPURLDesc *lud;
1112         unsigned short port;
1113         int err, addrlen = 0;
1114         struct sockaddr **sal, **psal;
1115         int socktype = SOCK_STREAM;     /* default to COTS */
1116
1117 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
1118         /*
1119          * use safe defaults
1120          */
1121         int     crit = 1;
1122 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
1123
1124         rc = ldap_url_parse( url, &lud );
1125
1126         if( rc != LDAP_URL_SUCCESS ) {
1127                 Debug( LDAP_DEBUG_ANY,
1128                         "daemon: listen URL \"%s\" parse error=%d\n",
1129                         url, rc, 0 );
1130                 return rc;
1131         }
1132
1133         l.sl_url.bv_val = NULL;
1134         l.sl_mute = 0;
1135 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1136         l.sl_busy = 0;
1137 #endif /* SLAP_LIGHTWEIGHT_DISPATCHER */
1138
1139 #ifndef HAVE_TLS
1140         if( ldap_pvt_url_scheme2tls( lud->lud_scheme ) ) {
1141                 Debug( LDAP_DEBUG_ANY, "daemon: TLS not supported (%s)\n",
1142                         url, 0, 0 );
1143                 ldap_free_urldesc( lud );
1144                 return -1;
1145         }
1146
1147         if(! lud->lud_port ) lud->lud_port = LDAP_PORT;
1148
1149 #else /* HAVE_TLS */
1150         l.sl_is_tls = ldap_pvt_url_scheme2tls( lud->lud_scheme );
1151
1152         if(! lud->lud_port ) {
1153                 lud->lud_port = l.sl_is_tls ? LDAPS_PORT : LDAP_PORT;
1154         }
1155 #endif /* HAVE_TLS */
1156
1157         port = (unsigned short) lud->lud_port;
1158
1159         tmp = ldap_pvt_url_scheme2proto(lud->lud_scheme);
1160         if ( tmp == LDAP_PROTO_IPC ) {
1161 #ifdef LDAP_PF_LOCAL
1162                 if ( lud->lud_host == NULL || lud->lud_host[0] == '\0' ) {
1163                         err = slap_get_listener_addresses(LDAPI_SOCK, 0, &sal);
1164                 } else {
1165                         err = slap_get_listener_addresses(lud->lud_host, 0, &sal);
1166                 }
1167 #else /* ! LDAP_PF_LOCAL */
1168
1169                 Debug( LDAP_DEBUG_ANY, "daemon: URL scheme not supported: %s",
1170                         url, 0, 0);
1171                 ldap_free_urldesc( lud );
1172                 return -1;
1173 #endif /* ! LDAP_PF_LOCAL */
1174         } else {
1175                 if( lud->lud_host == NULL || lud->lud_host[0] == '\0'
1176                         || strcmp(lud->lud_host, "*") == 0 )
1177                 {
1178                         err = slap_get_listener_addresses(NULL, port, &sal);
1179                 } else {
1180                         err = slap_get_listener_addresses(lud->lud_host, port, &sal);
1181                 }
1182         }
1183
1184 #ifdef LDAP_CONNECTIONLESS
1185         l.sl_is_udp = ( tmp == LDAP_PROTO_UDP );
1186 #endif /* LDAP_CONNECTIONLESS */
1187
1188 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
1189         if ( lud->lud_exts ) {
1190                 err = get_url_perms( lud->lud_exts, &l.sl_perms, &crit );
1191         } else {
1192                 l.sl_perms = S_IRWXU | S_IRWXO;
1193         }
1194 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
1195
1196         ldap_free_urldesc( lud );
1197         if ( err ) return -1;
1198
1199         /* If we got more than one address returned, we need to make space
1200          * for it in the slap_listeners array.
1201          */
1202         for ( num=0; sal[num]; num++ ) /* empty */;
1203         if ( num > 1 ) {
1204                 *listeners += num-1;
1205                 slap_listeners = ch_realloc( slap_listeners,
1206                         (*listeners + 1) * sizeof(Listener *) );
1207         }
1208
1209         psal = sal;
1210         while ( *sal != NULL ) {
1211                 char *af;
1212                 switch( (*sal)->sa_family ) {
1213                 case AF_INET:
1214                         af = "IPv4";
1215                         break;
1216 #ifdef LDAP_PF_INET6
1217                 case AF_INET6:
1218                         af = "IPv6";
1219                         break;
1220 #endif /* LDAP_PF_INET6 */
1221 #ifdef LDAP_PF_LOCAL
1222                 case AF_LOCAL:
1223                         af = "Local";
1224                         break;
1225 #endif /* LDAP_PF_LOCAL */
1226                 default:
1227                         sal++;
1228                         continue;
1229                 }
1230
1231 #ifdef LDAP_CONNECTIONLESS
1232                 if( l.sl_is_udp ) socktype = SOCK_DGRAM;
1233 #endif /* LDAP_CONNECTIONLESS */
1234
1235                 l.sl_sd = socket( (*sal)->sa_family, socktype, 0);
1236                 if ( l.sl_sd == AC_SOCKET_INVALID ) {
1237                         int err = sock_errno();
1238                         Debug( LDAP_DEBUG_ANY,
1239                                 "daemon: %s socket() failed errno=%d (%s)\n",
1240                                 af, err, sock_errstr(err) );
1241                         sal++;
1242                         continue;
1243                 }
1244
1245 #ifndef HAVE_WINSOCK
1246                 if ( l.sl_sd >= dtblsize ) {
1247                         Debug( LDAP_DEBUG_ANY,
1248                                 "daemon: listener descriptor %ld is too great %ld\n",
1249                                 (long) l.sl_sd, (long) dtblsize, 0 );
1250                         tcp_close( l.sl_sd );
1251                         sal++;
1252                         continue;
1253                 }
1254 #endif /* ! HAVE_WINSOCK */
1255
1256 #ifdef LDAP_PF_LOCAL
1257                 if ( (*sal)->sa_family == AF_LOCAL ) {
1258                         unlink( ((struct sockaddr_un *)*sal)->sun_path );
1259                 } else
1260 #endif /* LDAP_PF_LOCAL */
1261                 {
1262 #ifdef SO_REUSEADDR
1263                         /* enable address reuse */
1264                         tmp = 1;
1265                         rc = setsockopt( l.sl_sd, SOL_SOCKET, SO_REUSEADDR,
1266                                 (char *) &tmp, sizeof(tmp) );
1267                         if ( rc == AC_SOCKET_ERROR ) {
1268                                 int err = sock_errno();
1269                                 Debug( LDAP_DEBUG_ANY, "slapd(%ld): "
1270                                         "setsockopt(SO_REUSEADDR) failed errno=%d (%s)\n",
1271                                         (long) l.sl_sd, err, sock_errstr(err) );
1272                         }
1273 #endif /* SO_REUSEADDR */
1274                 }
1275
1276                 switch( (*sal)->sa_family ) {
1277                 case AF_INET:
1278                         addrlen = sizeof(struct sockaddr_in);
1279                         break;
1280 #ifdef LDAP_PF_INET6
1281                 case AF_INET6:
1282 #ifdef IPV6_V6ONLY
1283                         /* Try to use IPv6 sockets for IPv6 only */
1284                         tmp = 1;
1285                         rc = setsockopt( l.sl_sd, IPPROTO_IPV6, IPV6_V6ONLY,
1286                                 (char *) &tmp, sizeof(tmp) );
1287                         if ( rc == AC_SOCKET_ERROR ) {
1288                                 int err = sock_errno();
1289                                 Debug( LDAP_DEBUG_ANY, "slapd(%ld): "
1290                                         "setsockopt(IPV6_V6ONLY) failed errno=%d (%s)\n",
1291                                         (long) l.sl_sd, err, sock_errstr(err) );
1292                         }
1293 #endif /* IPV6_V6ONLY */
1294                         addrlen = sizeof(struct sockaddr_in6);
1295                         break;
1296 #endif /* LDAP_PF_INET6 */
1297
1298 #ifdef LDAP_PF_LOCAL
1299                 case AF_LOCAL:
1300 #ifdef LOCAL_CREDS
1301                         {
1302                                 int one = 1;
1303                                 setsockopt( l.sl_sd, 0, LOCAL_CREDS, &one, sizeof( one ) );
1304                         }
1305 #endif /* LOCAL_CREDS */
1306
1307                         addrlen = sizeof( struct sockaddr_un );
1308                         break;
1309 #endif /* LDAP_PF_LOCAL */
1310                 }
1311
1312 #ifdef LDAP_PF_LOCAL
1313                 /* create socket with all permissions set for those systems
1314                  * that honor permissions on sockets (e.g. Linux); typically,
1315                  * only write is required.  To exploit filesystem permissions,
1316                  * place the socket in a directory and use directory's
1317                  * permissions.  Need write perms to the directory to
1318                  * create/unlink the socket; likely need exec perms to access
1319                  * the socket (ITS#4709) */
1320                 {
1321                         mode_t old_umask;
1322
1323                         if ( (*sal)->sa_family == AF_LOCAL ) {
1324                                 old_umask = umask( 0 );
1325                         }
1326 #endif /* LDAP_PF_LOCAL */
1327                         rc = bind( l.sl_sd, *sal, addrlen );
1328 #ifdef LDAP_PF_LOCAL
1329                         if ( (*sal)->sa_family == AF_LOCAL ) {
1330                                 umask( old_umask );
1331                         }
1332                 }
1333 #endif /* LDAP_PF_LOCAL */
1334                 if ( rc ) {
1335                         err = sock_errno();
1336                         Debug( LDAP_DEBUG_ANY,
1337                                 "daemon: bind(%ld) failed errno=%d (%s)\n",
1338                                 (long)l.sl_sd, err, sock_errstr( err ) );
1339                         tcp_close( l.sl_sd );
1340                         sal++;
1341                         continue;
1342                 }
1343
1344                 switch ( (*sal)->sa_family ) {
1345 #ifdef LDAP_PF_LOCAL
1346                 case AF_LOCAL: {
1347                         char *addr = ((struct sockaddr_un *)*sal)->sun_path;
1348                         l.sl_name.bv_len = strlen(addr) + sizeof("PATH=") - 1;
1349                         l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len + 1 );
1350                         snprintf( l.sl_name.bv_val, l.sl_name.bv_len + 1,
1351                                 "PATH=%s", addr );
1352                 } break;
1353 #endif /* LDAP_PF_LOCAL */
1354
1355                 case AF_INET: {
1356                         char *s;
1357 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
1358                         char addr[INET_ADDRSTRLEN];
1359                         inet_ntop( AF_INET, &((struct sockaddr_in *)*sal)->sin_addr,
1360                                 addr, sizeof(addr) );
1361                         s = addr;
1362 #else /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1363                         s = inet_ntoa( ((struct sockaddr_in *) *sal)->sin_addr );
1364 #endif /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1365                         port = ntohs( ((struct sockaddr_in *)*sal) ->sin_port );
1366                         l.sl_name.bv_val =
1367                                 ber_memalloc( sizeof("IP=255.255.255.255:65535") );
1368                         snprintf( l.sl_name.bv_val, sizeof("IP=255.255.255.255:65535"),
1369                                 "IP=%s:%d",
1370                                  s != NULL ? s : SLAP_STRING_UNKNOWN, port );
1371                         l.sl_name.bv_len = strlen( l.sl_name.bv_val );
1372                 } break;
1373
1374 #ifdef LDAP_PF_INET6
1375                 case AF_INET6: {
1376                         char addr[INET6_ADDRSTRLEN];
1377                         inet_ntop( AF_INET6, &((struct sockaddr_in6 *)*sal)->sin6_addr,
1378                                 addr, sizeof addr);
1379                         port = ntohs( ((struct sockaddr_in6 *)*sal)->sin6_port );
1380                         l.sl_name.bv_len = strlen(addr) + sizeof("IP=[]:65535");
1381                         l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len );
1382                         snprintf( l.sl_name.bv_val, l.sl_name.bv_len, "IP=[%s]:%d",
1383                                 addr, port );
1384                         l.sl_name.bv_len = strlen( l.sl_name.bv_val );
1385                 } break;
1386 #endif /* LDAP_PF_INET6 */
1387
1388                 default:
1389                         Debug( LDAP_DEBUG_ANY, "daemon: unsupported address family (%d)\n",
1390                                 (int) (*sal)->sa_family, 0, 0 );
1391                         break;
1392                 }
1393
1394                 AC_MEMCPY(&l.sl_sa, *sal, addrlen);
1395                 ber_str2bv( url, 0, 1, &l.sl_url);
1396                 li = ch_malloc( sizeof( Listener ) );
1397                 *li = l;
1398                 slap_listeners[*cur] = li;
1399                 (*cur)++;
1400                 sal++;
1401         }
1402
1403         slap_free_listener_addresses(psal);
1404
1405         if ( l.sl_url.bv_val == NULL ) {
1406                 Debug( LDAP_DEBUG_TRACE,
1407                         "slap_open_listener: failed on %s\n", url, 0, 0 );
1408                 return -1;
1409         }
1410
1411         Debug( LDAP_DEBUG_TRACE, "daemon: listener initialized %s\n",
1412                 l.sl_url.bv_val, 0, 0 );
1413         return 0;
1414 }
1415
1416 static int sockinit(void);
1417 static int sockdestroy(void);
1418
1419 int
1420 slapd_daemon_init( const char *urls )
1421 {
1422         int i, j, n, rc;
1423         char **u;
1424
1425         Debug( LDAP_DEBUG_ARGS, "daemon_init: %s\n",
1426                 urls ? urls : "<null>", 0, 0 );
1427
1428         ldap_pvt_thread_mutex_init( &slap_daemon.sd_mutex );
1429 #ifdef HAVE_TCPD
1430         ldap_pvt_thread_mutex_init( &slap_daemon.sd_tcpd_mutex );
1431 #endif /* TCP Wrappers */
1432
1433         if( (rc = sockinit()) != 0 ) return rc;
1434
1435 #ifdef HAVE_SYSCONF
1436         dtblsize = sysconf( _SC_OPEN_MAX );
1437 #elif HAVE_GETDTABLESIZE
1438         dtblsize = getdtablesize();
1439 #else /* ! HAVE_SYSCONF && ! HAVE_GETDTABLESIZE */
1440         dtblsize = FD_SETSIZE;
1441 #endif /* ! HAVE_SYSCONF && ! HAVE_GETDTABLESIZE */
1442
1443         /* open a pipe (or something equivalent connected to itself).
1444          * we write a byte on this fd whenever we catch a signal. The main
1445          * loop will be select'ing on this socket, and will wake up when
1446          * this byte arrives.
1447          */
1448         if( (rc = lutil_pair( wake_sds )) < 0 ) {
1449                 Debug( LDAP_DEBUG_ANY,
1450                         "daemon: lutil_pair() failed rc=%d\n", rc, 0, 0 );
1451                 return rc;
1452         }
1453
1454         SLAP_SOCK_INIT;
1455
1456         if( urls == NULL ) urls = "ldap:///";
1457
1458         u = ldap_str2charray( urls, " " );
1459
1460         if( u == NULL || u[0] == NULL ) {
1461                 Debug( LDAP_DEBUG_ANY, "daemon_init: no urls (%s) provided.\n",
1462                         urls, 0, 0 );
1463                 if ( u )
1464                         ldap_charray_free( u );
1465                 return -1;
1466         }
1467
1468         for( i=0; u[i] != NULL; i++ ) {
1469                 Debug( LDAP_DEBUG_TRACE, "daemon_init: listen on %s\n",
1470                         u[i], 0, 0 );
1471         }
1472
1473         if( i == 0 ) {
1474                 Debug( LDAP_DEBUG_ANY, "daemon_init: no listeners to open (%s)\n",
1475                         urls, 0, 0 );
1476                 ldap_charray_free( u );
1477                 return -1;
1478         }
1479
1480         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners to open...\n",
1481                 i, 0, 0 );
1482         slap_listeners = ch_malloc( (i+1)*sizeof(Listener *) );
1483
1484         for(n = 0, j = 0; u[n]; n++ ) {
1485                 if ( slap_open_listener( u[n], &i, &j ) ) {
1486                         ldap_charray_free( u );
1487                         return -1;
1488                 }
1489         }
1490         slap_listeners[j] = NULL;
1491
1492         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners opened\n",
1493                 i, 0, 0 );
1494
1495
1496 #ifdef HAVE_SLP
1497         if( slapd_register_slp ) {
1498                 slapd_slp_init( urls );
1499                 slapd_slp_reg();
1500         }
1501 #endif /* HAVE_SLP */
1502
1503         ldap_charray_free( u );
1504
1505         return !i;
1506 }
1507
1508
1509 int
1510 slapd_daemon_destroy( void )
1511 {
1512         connections_destroy();
1513         tcp_close( wake_sds[1] );
1514         tcp_close( wake_sds[0] );
1515         sockdestroy();
1516
1517 #ifdef HAVE_SLP
1518         if( slapd_register_slp ) {
1519                 slapd_slp_dereg();
1520                 slapd_slp_deinit();
1521         }
1522 #endif /* HAVE_SLP */
1523
1524 #ifdef HAVE_TCPD
1525         ldap_pvt_thread_mutex_destroy( &slap_daemon.sd_tcpd_mutex );
1526 #endif /* TCP Wrappers */
1527
1528         ldap_pvt_thread_mutex_destroy( &slap_daemon.sd_mutex );
1529         return 0;
1530 }
1531
1532
1533 static void
1534 close_listeners(
1535         int remove )
1536 {
1537         int l;
1538
1539         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1540                 Listener *lr = slap_listeners[l];
1541
1542                 if ( lr->sl_sd != AC_SOCKET_INVALID ) {
1543                         if ( remove ) slapd_remove( lr->sl_sd, NULL, 0, 0, 0 );
1544
1545 #ifdef LDAP_PF_LOCAL
1546                         if ( lr->sl_sa.sa_addr.sa_family == AF_LOCAL ) {
1547                                 unlink( lr->sl_sa.sa_un_addr.sun_path );
1548                         }
1549 #endif /* LDAP_PF_LOCAL */
1550
1551                         slapd_close( lr->sl_sd );
1552                 }
1553
1554                 if ( lr->sl_url.bv_val ) {
1555                         ber_memfree( lr->sl_url.bv_val );
1556                 }
1557
1558                 if ( lr->sl_name.bv_val ) {
1559                         ber_memfree( lr->sl_name.bv_val );
1560                 }
1561
1562                 free( lr );
1563                 slap_listeners[l] = NULL;
1564         }
1565 }
1566
1567 static int
1568 slap_listener(
1569         Listener *sl )
1570 {
1571         Sockaddr                from;
1572
1573         ber_socket_t s;
1574         socklen_t len = sizeof(from);
1575         Connection *c;
1576         slap_ssf_t ssf = 0;
1577         struct berval authid = BER_BVNULL;
1578 #ifdef SLAPD_RLOOKUPS
1579         char hbuf[NI_MAXHOST];
1580 #endif /* SLAPD_RLOOKUPS */
1581
1582         char    *dnsname = NULL;
1583         char    *peeraddr = NULL;
1584 #ifdef LDAP_PF_LOCAL
1585         char peername[MAXPATHLEN + sizeof("PATH=")];
1586 #ifdef LDAP_PF_LOCAL_SENDMSG
1587         char peerbuf[8];
1588         struct berval peerbv = BER_BVNULL;
1589 #endif
1590 #elif defined(LDAP_PF_INET6)
1591         char peername[sizeof("IP=[ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff]:65535")];
1592 #else /* ! LDAP_PF_LOCAL && ! LDAP_PF_INET6 */
1593         char peername[sizeof("IP=255.255.255.255:65336")];
1594 #endif /* LDAP_PF_LOCAL */
1595
1596         Debug( LDAP_DEBUG_TRACE,
1597                 ">>> slap_listener(%s)\n",
1598                 sl->sl_url.bv_val, 0, 0 );
1599
1600         peername[0] = '\0';
1601
1602 #ifdef LDAP_CONNECTIONLESS
1603         if ( sl->sl_is_udp ) return 1;
1604 #endif /* LDAP_CONNECTIONLESS */
1605
1606 #  ifdef LDAP_PF_LOCAL
1607         /* FIXME: apparently accept doesn't fill
1608          * the sun_path sun_path member */
1609         from.sa_un_addr.sun_path[0] = '\0';
1610 #  endif /* LDAP_PF_LOCAL */
1611
1612         s = accept( sl->sl_sd, (struct sockaddr *) &from, &len );
1613
1614 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1615         /* Resume the listener FD to allow concurrent-processing of
1616          * additional incoming connections.
1617          */
1618         sl->sl_busy = 0;
1619         WAKE_LISTENER(1);
1620 #endif /* SLAP_LIGHTWEIGHT_DISPATCHER */
1621
1622         if ( s == AC_SOCKET_INVALID ) {
1623                 int err = sock_errno();
1624
1625                 if(
1626 #ifdef EMFILE
1627                     err == EMFILE ||
1628 #endif /* EMFILE */
1629 #ifdef ENFILE
1630                     err == ENFILE ||
1631 #endif /* ENFILE */
1632                     0 )
1633                 {
1634                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1635                         emfile++;
1636                         /* Stop listening until an existing session closes */
1637                         sl->sl_mute = 1;
1638                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1639                 }
1640
1641                 Debug( LDAP_DEBUG_ANY,
1642                         "daemon: accept(%ld) failed errno=%d (%s)\n",
1643                         (long) sl->sl_sd, err, sock_errstr(err) );
1644                 ldap_pvt_thread_yield();
1645                 return 0;
1646         }
1647
1648 #ifndef HAVE_WINSOCK
1649         /* make sure descriptor number isn't too great */
1650         if ( s >= dtblsize ) {
1651                 Debug( LDAP_DEBUG_ANY,
1652                         "daemon: %ld beyond descriptor table size %ld\n",
1653                         (long) s, (long) dtblsize, 0 );
1654
1655                 slapd_close(s);
1656                 ldap_pvt_thread_yield();
1657                 return 0;
1658         }
1659 #endif /* ! HAVE_WINSOCK */
1660
1661 #ifdef LDAP_DEBUG
1662         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1663         /* newly accepted stream should not be in any of the FD SETS */
1664         assert( SLAP_SOCK_NOT_ACTIVE( s ));
1665         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1666 #endif /* LDAP_DEBUG */
1667
1668 #if defined( SO_KEEPALIVE ) || defined( TCP_NODELAY )
1669 #ifdef LDAP_PF_LOCAL
1670         /* for IPv4 and IPv6 sockets only */
1671         if ( from.sa_addr.sa_family != AF_LOCAL )
1672 #endif /* LDAP_PF_LOCAL */
1673         {
1674                 int rc;
1675                 int tmp;
1676 #ifdef SO_KEEPALIVE
1677                 /* enable keep alives */
1678                 tmp = 1;
1679                 rc = setsockopt( s, SOL_SOCKET, SO_KEEPALIVE,
1680                         (char *) &tmp, sizeof(tmp) );
1681                 if ( rc == AC_SOCKET_ERROR ) {
1682                         int err = sock_errno();
1683                         Debug( LDAP_DEBUG_ANY,
1684                                 "slapd(%ld): setsockopt(SO_KEEPALIVE) failed "
1685                                 "errno=%d (%s)\n", (long) s, err, sock_errstr(err) );
1686                 }
1687 #endif /* SO_KEEPALIVE */
1688 #ifdef TCP_NODELAY
1689                 /* enable no delay */
1690                 tmp = 1;
1691                 rc = setsockopt( s, IPPROTO_TCP, TCP_NODELAY,
1692                         (char *)&tmp, sizeof(tmp) );
1693                 if ( rc == AC_SOCKET_ERROR ) {
1694                         int err = sock_errno();
1695                         Debug( LDAP_DEBUG_ANY,
1696                                 "slapd(%ld): setsockopt(TCP_NODELAY) failed "
1697                                 "errno=%d (%s)\n", (long) s, err, sock_errstr(err) );
1698                 }
1699 #endif /* TCP_NODELAY */
1700         }
1701 #endif /* SO_KEEPALIVE || TCP_NODELAY */
1702
1703         Debug( LDAP_DEBUG_CONNS,
1704                 "daemon: listen=%ld, new connection on %ld\n",
1705                 (long) sl->sl_sd, (long) s, 0 );
1706
1707         switch ( from.sa_addr.sa_family ) {
1708 #  ifdef LDAP_PF_LOCAL
1709         case AF_LOCAL:
1710                 /* FIXME: apparently accept doesn't fill
1711                  * the sun_path sun_path member */
1712                 if ( from.sa_un_addr.sun_path[0] == '\0' ) {
1713                         AC_MEMCPY( from.sa_un_addr.sun_path,
1714                                         sl->sl_sa.sa_un_addr.sun_path,
1715                                         sizeof( from.sa_un_addr.sun_path ) );
1716                 }
1717
1718                 sprintf( peername, "PATH=%s", from.sa_un_addr.sun_path );
1719                 ssf = local_ssf;
1720                 {
1721                         uid_t uid;
1722                         gid_t gid;
1723                         int rc;
1724
1725 #ifdef LDAP_PF_LOCAL_SENDMSG
1726                         peerbv.bv_val = peerbuf;
1727                         peerbv.bv_len = sizeof( peerbuf );
1728 #endif
1729                         if( LUTIL_GETPEEREID( s, &uid, &gid, &peerbv ) == 0 ) {
1730                                 authid.bv_val = ch_malloc(
1731                                         STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
1732                                         "cn=peercred,cn=external,cn=auth" ) + 1 );
1733                                 authid.bv_len = sprintf( authid.bv_val,
1734                                         "gidNumber=%d+uidNumber=%d,"
1735                                         "cn=peercred,cn=external,cn=auth",
1736                                         (int) gid, (int) uid );
1737                                 assert( authid.bv_len <=
1738                                         STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
1739                                         "cn=peercred,cn=external,cn=auth" ) );
1740                         }
1741                 }
1742                 dnsname = "local";
1743                 break;
1744 #endif /* LDAP_PF_LOCAL */
1745
1746 #  ifdef LDAP_PF_INET6
1747         case AF_INET6:
1748         if ( IN6_IS_ADDR_V4MAPPED(&from.sa_in6_addr.sin6_addr) ) {
1749                 peeraddr = inet_ntoa( *((struct in_addr *)
1750                                         &from.sa_in6_addr.sin6_addr.s6_addr[12]) );
1751                 sprintf( peername, "IP=%s:%d",
1752                          peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1753                          (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
1754         } else {
1755                 char addr[INET6_ADDRSTRLEN];
1756
1757                 peeraddr = (char *) inet_ntop( AF_INET6,
1758                                       &from.sa_in6_addr.sin6_addr,
1759                                       addr, sizeof addr );
1760                 sprintf( peername, "IP=[%s]:%d",
1761                          peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1762                          (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
1763         }
1764         break;
1765 #  endif /* LDAP_PF_INET6 */
1766
1767         case AF_INET:
1768                 peeraddr = inet_ntoa( from.sa_in_addr.sin_addr );
1769                 sprintf( peername, "IP=%s:%d",
1770                         peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1771                         (unsigned) ntohs( from.sa_in_addr.sin_port ) );
1772                 break;
1773
1774         default:
1775                 slapd_close(s);
1776                 return 0;
1777         }
1778
1779         if ( ( from.sa_addr.sa_family == AF_INET )
1780 #ifdef LDAP_PF_INET6
1781                 || ( from.sa_addr.sa_family == AF_INET6 )
1782 #endif /* LDAP_PF_INET6 */
1783                 )
1784         {
1785                 dnsname = NULL;
1786 #ifdef SLAPD_RLOOKUPS
1787                 if ( use_reverse_lookup ) {
1788                         char *herr;
1789                         if (ldap_pvt_get_hname( (const struct sockaddr *)&from, len, hbuf,
1790                                 sizeof(hbuf), &herr ) == 0) {
1791                                 ldap_pvt_str2lower( hbuf );
1792                                 dnsname = hbuf;
1793                         }
1794                 }
1795 #endif /* SLAPD_RLOOKUPS */
1796
1797 #ifdef HAVE_TCPD
1798                 {
1799                         int rc;
1800                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_tcpd_mutex );
1801                         rc = hosts_ctl("slapd",
1802                                 dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1803                                 peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1804                                 SLAP_STRING_UNKNOWN );
1805                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_tcpd_mutex );
1806                         if ( !rc ) {
1807                                 /* DENY ACCESS */
1808                                 Statslog( LDAP_DEBUG_STATS,
1809                                         "fd=%ld DENIED from %s (%s)\n",
1810                                         (long) s,
1811                                         dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1812                                         peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1813                                         0, 0 );
1814                                 slapd_close(s);
1815                                 return 0;
1816                         }
1817                 }
1818 #endif /* HAVE_TCPD */
1819         }
1820
1821         c = connection_init(s, sl,
1822                 dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1823                 peername,
1824 #ifdef HAVE_TLS
1825                 sl->sl_is_tls ? CONN_IS_TLS : 0,
1826 #else /* ! HAVE_TLS */
1827                 0,
1828 #endif /* ! HAVE_TLS */
1829                 ssf,
1830                 authid.bv_val ? &authid : NULL );
1831
1832         if( authid.bv_val ) ch_free(authid.bv_val);
1833
1834         if( !c ) {
1835                 Debug( LDAP_DEBUG_ANY,
1836                         "daemon: connection_init(%ld, %s, %s) failed.\n",
1837                         (long) s, peername, sl->sl_name.bv_val );
1838                 slapd_close(s);
1839                 return 0;
1840         }
1841
1842 #ifdef LDAP_PF_LOCAL_SENDMSG
1843         if ( !BER_BVISEMPTY( &peerbv ))
1844                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_UNGET_BUF, &peerbv );
1845 #endif
1846
1847         Statslog( LDAP_DEBUG_STATS,
1848                 "conn=%ld fd=%ld ACCEPT from %s (%s)\n",
1849                 c->c_connid, (long) s, peername, sl->sl_name.bv_val,
1850                 0 );
1851
1852         return 0;
1853 }
1854
1855 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1856 static void*
1857 slap_listener_thread(
1858         void* ctx,
1859         void* ptr )
1860 {
1861         int             rc;
1862         Listener        *sl = (Listener *)ptr;
1863
1864         rc = slap_listener( sl );
1865
1866         if( rc != LDAP_SUCCESS ) {
1867                 Debug( LDAP_DEBUG_ANY,
1868                         "slap_listener_thread(%s): failed err=%d",
1869                         sl->sl_url.bv_val, rc, 0 );
1870         }
1871
1872         return (void*)NULL;
1873 }
1874
1875 static int
1876 slap_listener_activate(
1877         Listener* sl )
1878 {
1879         int rc;
1880
1881         Debug( LDAP_DEBUG_TRACE, "slap_listener_activate(%d): %s\n",
1882                 sl->sl_sd, sl->sl_busy ? "busy" : "", 0 );
1883
1884         sl->sl_busy++;
1885
1886         rc = ldap_pvt_thread_pool_submit( &connection_pool,
1887                 slap_listener_thread, (void *) sl );
1888
1889         if( rc != 0 ) {
1890                 Debug( LDAP_DEBUG_ANY,
1891                         "listener_activate(%d): submit failed (%d)\n",
1892                         sl->sl_sd, rc, 0 );
1893         }
1894         return rc;
1895 }
1896 #endif /* SLAP_LIGHTWEIGHT_DISPATCHER */
1897
1898 static void *
1899 slapd_daemon_task(
1900         void *ptr )
1901 {
1902         int l;
1903         time_t last_idle_check = 0;
1904         struct timeval idle;
1905         int ebadf = 0;
1906
1907 #define SLAPD_IDLE_CHECK_LIMIT 4
1908
1909         if ( global_idletimeout > 0 ) {
1910                 last_idle_check = slap_get_time();
1911                 /* Set the select timeout.
1912                  * Don't just truncate, preserve the fractions of
1913                  * seconds to prevent sleeping for zero time.
1914                  */
1915                 idle.tv_sec = global_idletimeout / SLAPD_IDLE_CHECK_LIMIT;
1916                 idle.tv_usec = global_idletimeout - \
1917                         ( idle.tv_sec * SLAPD_IDLE_CHECK_LIMIT );
1918                 idle.tv_usec *= 1000000 / SLAPD_IDLE_CHECK_LIMIT;
1919         } else {
1920                 idle.tv_sec = 0;
1921                 idle.tv_usec = 0;
1922         }
1923
1924         slapd_add( wake_sds[0], 0, NULL );
1925
1926         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1927                 if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) continue;
1928
1929 #ifdef LDAP_CONNECTIONLESS
1930                 /* Since this is connectionless, the data port is the
1931                  * listening port. The listen() and accept() calls
1932                  * are unnecessary.
1933                  */
1934                 if ( slap_listeners[l]->sl_is_udp )
1935                         continue;
1936 #endif /* LDAP_CONNECTIONLESS */
1937
1938                 if ( listen( slap_listeners[l]->sl_sd, SLAPD_LISTEN_BACKLOG ) == -1 ) {
1939                         int err = sock_errno();
1940
1941 #ifdef LDAP_PF_INET6
1942                         /* If error is EADDRINUSE, we are trying to listen to INADDR_ANY and
1943                          * we are already listening to in6addr_any, then we want to ignore
1944                          * this and continue.
1945                          */
1946                         if ( err == EADDRINUSE ) {
1947                                 int i;
1948                                 struct sockaddr_in sa = slap_listeners[l]->sl_sa.sa_in_addr;
1949                                 struct sockaddr_in6 sa6;
1950
1951                                 if ( sa.sin_family == AF_INET &&
1952                                      sa.sin_addr.s_addr == htonl(INADDR_ANY) ) {
1953                                         for ( i = 0 ; i < l; i++ ) {
1954                                                 sa6 = slap_listeners[i]->sl_sa.sa_in6_addr;
1955                                                 if ( sa6.sin6_family == AF_INET6 &&
1956                                                      !memcmp( &sa6.sin6_addr, &in6addr_any,
1957                                                                 sizeof(struct in6_addr) ) )
1958                                                 {
1959                                                         break;
1960                                                 }
1961                                         }
1962
1963                                         if ( i < l ) {
1964                                                 /* We are already listening to in6addr_any */
1965                                                 Debug( LDAP_DEBUG_CONNS,
1966                                                         "daemon: Attempt to listen to 0.0.0.0 failed, "
1967                                                         "already listening on ::, assuming IPv4 included\n",
1968                                                         0, 0, 0 );
1969                                                 slapd_close( slap_listeners[l]->sl_sd );
1970                                                 slap_listeners[l]->sl_sd = AC_SOCKET_INVALID;
1971                                                 continue;
1972                                         }
1973                                 }
1974                         }
1975 #endif /* LDAP_PF_INET6 */
1976                         Debug( LDAP_DEBUG_ANY,
1977                                 "daemon: listen(%s, 5) failed errno=%d (%s)\n",
1978                                         slap_listeners[l]->sl_url.bv_val, err,
1979                                         sock_errstr(err) );
1980                         return (void*)-1;
1981                 }
1982
1983 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1984                 /* make the listening socket non-blocking */
1985                 if ( ber_pvt_socket_set_nonblock( slap_listeners[l]->sl_sd, 1 ) < 0 ) {
1986                         Debug( LDAP_DEBUG_ANY, "slapd_daemon_task: "
1987                                 "set nonblocking on a listening socket failed\n",
1988                                 0, 0, 0 );
1989                         slapd_shutdown = 2;
1990                         return (void*)-1;
1991                 }
1992 #endif /* SLAP_LIGHTWEIGHT_DISPATCHER */
1993
1994                 slapd_add( slap_listeners[l]->sl_sd, 0, slap_listeners[l] );
1995         }
1996
1997 #ifdef HAVE_NT_SERVICE_MANAGER
1998         if ( started_event != NULL ) {
1999                 ldap_pvt_thread_cond_signal( &started_event );
2000         }
2001 #endif /* HAVE_NT_SERVICE_MANAGER */
2002
2003 #ifdef SLAP_SEM_LOAD_CONTROL
2004         /*
2005          * initialize count and lazyness of a semaphore
2006          */
2007         (void) ldap_lazy_sem_init(
2008                 SLAP_MAX_WORKER_THREADS + 4 /* max workers + margin */,
2009                 4 /* lazyness */ );
2010 #endif /* SLAP_SEM_LOAD_CONTROL */
2011
2012         /* initialization complete. Here comes the loop. */
2013
2014         while ( !slapd_shutdown ) {
2015                 ber_socket_t            i;
2016                 int                     ns, nwriters;
2017                 int                     at;
2018                 ber_socket_t            nfds;
2019 #if SLAP_EVENTS_ARE_INDEXED
2020                 ber_socket_t            nrfds, nwfds;
2021 #endif /* SLAP_EVENTS_ARE_INDEXED */
2022 #define SLAPD_EBADF_LIMIT 16
2023
2024                 time_t                  now;
2025
2026                 SLAP_EVENT_DECL;
2027
2028                 struct timeval          tv;
2029                 struct timeval          *tvp;
2030
2031                 struct timeval          cat;
2032                 time_t                  tdelta = 1;
2033                 struct re_s*            rtask;
2034
2035                 now = slap_get_time();
2036
2037                 if ( ( global_idletimeout > 0 ) &&
2038                         difftime( last_idle_check +
2039                                 global_idletimeout/SLAPD_IDLE_CHECK_LIMIT, now ) < 0 )
2040                 {
2041                         connections_timeout_idle( now );
2042                         last_idle_check = now;
2043                 }
2044                 tv = idle;
2045
2046 #ifdef SIGHUP
2047                 if ( slapd_gentle_shutdown ) {
2048                         ber_socket_t active;
2049
2050                         if ( slapd_gentle_shutdown == 1 ) {
2051                                 BackendDB *be;
2052                                 Debug( LDAP_DEBUG_ANY, "slapd gentle shutdown\n", 0, 0, 0 );
2053                                 close_listeners( 1 );
2054                                 frontendDB->be_restrictops |= SLAP_RESTRICT_OP_WRITES;
2055                                 LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
2056                                         be->be_restrictops |= SLAP_RESTRICT_OP_WRITES;
2057                                 }
2058                                 slapd_gentle_shutdown = 2;
2059                         }
2060
2061                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
2062                         active = slap_daemon.sd_nactives;
2063                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
2064                         if ( active == 0 ) {
2065                                 slapd_shutdown = 1;
2066                                 break;
2067                         }
2068                 }
2069 #endif /* SIGHUP */
2070                 at = 0;
2071
2072                 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
2073
2074                 nwriters = slap_daemon.sd_nwriters;
2075
2076                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2077                         Listener *lr = slap_listeners[l];
2078
2079                         if ( lr->sl_sd == AC_SOCKET_INVALID ) continue;
2080
2081 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2082                         if ( lr->sl_mute || lr->sl_busy )
2083 #else /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
2084                         if ( lr->sl_mute )
2085 #endif /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
2086                         {
2087                                 SLAP_SOCK_CLR_READ( lr->sl_sd );
2088                         } else {
2089                                 SLAP_SOCK_SET_READ( lr->sl_sd );
2090                         }
2091                 }
2092
2093                 SLAP_EVENT_INIT;
2094
2095                 nfds = SLAP_EVENT_MAX;
2096
2097                 if ( global_idletimeout && slap_daemon.sd_nactives ) at = 1;
2098
2099                 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
2100
2101                 if ( at
2102 #if defined(HAVE_YIELDING_SELECT) || defined(NO_THREADS)
2103                         &&  ( tv.tv_sec || tv.tv_usec )
2104 #endif /* HAVE_YIELDING_SELECT || NO_THREADS */
2105                         )
2106                 {
2107                         tvp = &tv;
2108                 } else {
2109                         tvp = NULL;
2110                 }
2111
2112                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
2113                 rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
2114                 while ( rtask && cat.tv_sec && cat.tv_sec <= now ) {
2115                         if ( ldap_pvt_runqueue_isrunning( &slapd_rq, rtask )) {
2116                                 ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
2117                         } else {
2118                                 ldap_pvt_runqueue_runtask( &slapd_rq, rtask );
2119                                 ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
2120                                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
2121                                 ldap_pvt_thread_pool_submit( &connection_pool,
2122                                         rtask->routine, (void *) rtask );
2123                                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
2124                         }
2125                         rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
2126                 }
2127                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
2128
2129                 if ( rtask && cat.tv_sec ) {
2130                         /* NOTE: diff __should__ always be >= 0,
2131                          * AFAI understand; however (ITS#4872),
2132                          * time_t might be unsigned in some systems,
2133                          * while difftime() returns a double */
2134                         double diff = difftime( cat.tv_sec, now );
2135                         if ( diff <= 0 ) {
2136                                 diff = tdelta;
2137                         }
2138                         if ( tvp == NULL || diff < tv.tv_sec ) {
2139                                 tv.tv_sec = diff;
2140                                 tv.tv_usec = 0;
2141                                 tvp = &tv;
2142                         }
2143                 }
2144
2145                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2146                         Listener *lr = slap_listeners[l];
2147
2148                         if ( lr->sl_sd == AC_SOCKET_INVALID ) {
2149                                 continue;
2150                         }
2151
2152                         if ( lr->sl_mute ) {
2153                                 Debug( LDAP_DEBUG_CONNS,
2154                                         "daemon: " SLAP_EVENT_FNAME ": "
2155                                         "listen=%d muted\n",
2156                                         lr->sl_sd, 0, 0 );
2157                                 continue;
2158                         }
2159
2160 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2161                         if ( lr->sl_busy ) {
2162                                 Debug( LDAP_DEBUG_CONNS,
2163                                         "daemon: " SLAP_EVENT_FNAME ": "
2164                                         "listen=%d busy\n",
2165                                         lr->sl_sd, 0, 0 );
2166                                 continue;
2167                         }
2168 #endif /* SLAP_LIGHTWEIGHT_DISPATCHER */
2169
2170                         Debug( LDAP_DEBUG_CONNS,
2171                                 "daemon: " SLAP_EVENT_FNAME ": "
2172                                 "listen=%d active_threads=%d tvp=%s\n",
2173                                 lr->sl_sd, at, tvp == NULL ? "NULL" : "zero" );
2174                 }
2175
2176                 SLAP_EVENT_WAIT( tvp, &ns );
2177                 switch ( ns ) {
2178                 case -1: {      /* failure - try again */
2179                                 int err = sock_errno();
2180
2181                                 if ( err != EINTR ) {
2182                                         ebadf++;
2183
2184                                         /* Don't log unless we got it twice in a row */
2185                                         if ( !( ebadf & 1 ) ) {
2186                                                 Debug( LDAP_DEBUG_ANY,
2187                                                         "daemon: "
2188                                                         SLAP_EVENT_FNAME
2189                                                         "failed count %d "
2190                                                         "err (%d): %s\n",
2191                                                         ebadf, err,
2192                                                         sock_errstr( err ) );
2193                                         }
2194                                         if ( ebadf >= SLAPD_EBADF_LIMIT ) {
2195                                                 slapd_shutdown = 2;
2196                                         }
2197                                 }
2198                         }
2199                         continue;
2200
2201                 case 0:         /* timeout - let threads run */
2202                         ebadf = 0;
2203 #ifndef HAVE_YIELDING_SELECT
2204                         Debug( LDAP_DEBUG_CONNS, "daemon: " SLAP_EVENT_FNAME
2205                                 "timeout - yielding\n",
2206                                 0, 0, 0 );
2207
2208                         ldap_pvt_thread_yield();
2209 #endif /* ! HAVE_YIELDING_SELECT */
2210                         continue;
2211
2212                 default:        /* something happened - deal with it */
2213                         if ( slapd_shutdown ) continue;
2214
2215                         ebadf = 0;
2216                         Debug( LDAP_DEBUG_CONNS,
2217                                 "daemon: activity on %d descriptor%s\n",
2218                                 ns, ns != 1 ? "s" : "", 0 );
2219                         /* FALL THRU */
2220                 }
2221
2222 #if SLAP_EVENTS_ARE_INDEXED
2223                 if ( SLAP_EVENT_IS_READ( wake_sds[0] ) ) {
2224                         char c[BUFSIZ];
2225                         SLAP_EVENT_CLR_READ( wake_sds[0] );
2226                         waking = 0;
2227                         tcp_read( wake_sds[0], c, sizeof(c) );
2228                         Debug( LDAP_DEBUG_CONNS, "daemon: waked\n", 0, 0, 0 );
2229                         continue;
2230                 }
2231
2232                 /* The event slot equals the descriptor number - this is
2233                  * true for Unix select and poll. We treat Windows select
2234                  * like this too, even though it's a kludge.
2235                  */
2236                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2237                         int rc;
2238
2239                         if ( ns <= 0 ) break;
2240                         if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) continue;
2241 #ifdef LDAP_CONNECTIONLESS
2242                         if ( slap_listeners[l]->sl_is_udp ) continue;
2243 #endif /* LDAP_CONNECTIONLESS */
2244                         if ( !SLAP_EVENT_IS_READ( slap_listeners[l]->sl_sd ) ) continue;
2245
2246                         /* clear events */
2247                         SLAP_EVENT_CLR_READ( slap_listeners[l]->sl_sd );
2248                         SLAP_EVENT_CLR_WRITE( slap_listeners[l]->sl_sd );
2249                         ns--;
2250
2251 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2252                         rc = slap_listener_activate( slap_listeners[l] );
2253 #else /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
2254                         rc = slap_listener( slap_listeners[l] );
2255 #endif /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
2256                 }
2257
2258                 /* bypass the following tests if no descriptors left */
2259                 if ( ns <= 0 ) {
2260 #ifndef HAVE_YIELDING_SELECT
2261                         ldap_pvt_thread_yield();
2262 #endif /* HAVE_YIELDING_SELECT */
2263                         continue;
2264                 }
2265
2266                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
2267 #ifdef HAVE_WINSOCK
2268                 nrfds = readfds.fd_count;
2269                 nwfds = writefds.fd_count;
2270                 for ( i = 0; i < readfds.fd_count; i++ ) {
2271                         Debug( LDAP_DEBUG_CONNS, " %d%s",
2272                                 readfds.fd_array[i], "r", 0 );
2273                 }
2274                 for ( i = 0; i < writefds.fd_count; i++ ) {
2275                         Debug( LDAP_DEBUG_CONNS, " %d%s",
2276                                 writefds.fd_array[i], "w", 0 );
2277                 }
2278
2279 #else /* ! HAVE_WINSOCK */
2280                 nrfds = 0;
2281                 nwfds = 0;
2282                 for ( i = 0; i < nfds; i++ ) {
2283                         int     r, w;
2284
2285                         r = SLAP_EVENT_IS_READ( i );
2286                         /* writefds was not initialized if nwriters was zero */
2287                         w = nwriters ? SLAP_EVENT_IS_WRITE( i ) : 0;
2288                         if ( r || w ) {
2289                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", i,
2290                                     r ? "r" : "", w ? "w" : "" );
2291                                 if ( r ) {
2292                                         nrfds++;
2293                                         ns--;
2294                                 }
2295                                 if ( w ) {
2296                                         nwfds++;
2297                                         ns--;
2298                                 }
2299                         }
2300                         if ( ns <= 0 ) break;
2301                 }
2302 #endif /* ! HAVE_WINSOCK */
2303                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
2304
2305                 /* loop through the writers */
2306                 for ( i = 0; nwfds > 0; i++ ) {
2307                         ber_socket_t wd;
2308 #ifdef HAVE_WINSOCK
2309                         wd = writefds.fd_array[i];
2310 #else /* ! HAVE_WINSOCK */
2311                         if ( ! SLAP_EVENT_IS_WRITE( i ) ) continue;
2312                         wd = i;
2313 #endif /* ! HAVE_WINSOCK */
2314
2315                         SLAP_EVENT_CLR_WRITE( wd );
2316                         nwfds--;
2317
2318                         Debug( LDAP_DEBUG_CONNS,
2319                                 "daemon: write active on %d\n",
2320                                 wd, 0, 0 );
2321
2322                         /*
2323                          * NOTE: it is possible that the connection was closed
2324                          * and that the stream is now inactive.
2325                          * connection_write() must validate the stream is still
2326                          * active.
2327                          *
2328                          * ITS#4338: if the stream is invalid, there is no need to
2329                          * close it here. It has already been closed in connection.c.
2330                          */
2331                         if ( connection_write( wd ) < 0 ) {
2332                                 if ( SLAP_EVENT_IS_READ( wd ) ) {
2333                                         SLAP_EVENT_CLR_READ( (unsigned) wd );
2334                                         nrfds--;
2335                                 }
2336                         }
2337                 }
2338
2339                 for ( i = 0; nrfds > 0; i++ ) {
2340                         ber_socket_t rd;
2341 #ifdef HAVE_WINSOCK
2342                         rd = readfds.fd_array[i];
2343 #else /* ! HAVE_WINSOCK */
2344                         if ( ! SLAP_EVENT_IS_READ( i ) ) continue;
2345                         rd = i;
2346 #endif /* ! HAVE_WINSOCK */
2347                         SLAP_EVENT_CLR_READ( rd );
2348                         nrfds--;
2349
2350                         Debug ( LDAP_DEBUG_CONNS,
2351                                 "daemon: read activity on %d\n", rd, 0, 0 );
2352                         /*
2353                          * NOTE: it is possible that the connection was closed
2354                          * and that the stream is now inactive.
2355                          * connection_read() must valid the stream is still
2356                          * active.
2357                          */
2358
2359 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2360                         connection_read_activate( rd );
2361 #else /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
2362                         connection_read( rd );
2363 #endif /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
2364                 }
2365 #else   /* !SLAP_EVENTS_ARE_INDEXED */
2366         /* FIXME */
2367         /* The events are returned in an arbitrary list. This is true
2368          * for /dev/poll, epoll and kqueue. In order to prioritize things
2369          * so that we can handle wake_sds first, listeners second, and then
2370          * all other connections last (as we do for select), we would need
2371          * to use multiple event handles and cascade them.
2372          *
2373          * That seems like a bit of hassle. So the wake_sds check has been
2374          * skipped. For epoll and kqueue we can associate arbitrary data with
2375          * an event, so we could use pointers to the listener structure
2376          * instead of just the file descriptor. For /dev/poll we have to
2377          * search the listeners array for a matching descriptor.
2378          *
2379          * We now handle wake events when we see them; they are not given
2380          * higher priority.
2381          */
2382 #ifdef LDAP_DEBUG
2383                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
2384
2385                 for ( i = 0; i < ns; i++ ) {
2386                         int     r, w;
2387
2388                         /* Don't log listener events */
2389                         if ( SLAP_EVENT_IS_LISTENER( i )
2390 #ifdef LDAP_CONNECTIONLESS
2391                                 && !( (SLAP_EVENT_LISTENER( i ))->sl_is_udp )
2392 #endif /* LDAP_CONNECTIONLESS */
2393                                 )
2394                         {
2395                                 continue;
2396                         }
2397
2398                         /* Don't log internal wake events */
2399                         if ( SLAP_EVENT_FD( i ) == wake_sds[0] ) continue;
2400
2401                         r = SLAP_EVENT_IS_READ( i );
2402                         w = SLAP_EVENT_IS_WRITE( i );
2403                         if ( r || w ) {
2404                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", SLAP_EVENT_FD(i),
2405                                     r ? "r" : "", w ? "w" : "" );
2406                         }
2407                 }
2408                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
2409 #endif /* LDAP_DEBUG */
2410
2411                 for ( i = 0; i < ns; i++ ) {
2412                         int rc = 1, fd;
2413
2414                         if ( SLAP_EVENT_IS_LISTENER( i ) ) {
2415 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2416                                 rc = slap_listener_activate( SLAP_EVENT_LISTENER( i ) );
2417 #else /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
2418                                 rc = slap_listener( SLAP_EVENT_LISTENER( i ) );
2419 #endif /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
2420                         }
2421
2422                         /* If we found a regular listener, rc is now zero, and we
2423                          * can skip the data portion. But if it was a UDP listener
2424                          * then rc is still 1, and we want to handle the data.
2425                          */
2426                         if ( rc ) {
2427                                 fd = SLAP_EVENT_FD( i );
2428
2429                                 /* Handle wake events */
2430                                 if ( fd == wake_sds[0] ) {
2431                                         char c[BUFSIZ];
2432                                         waking = 0;
2433                                         tcp_read( wake_sds[0], c, sizeof(c) );
2434                                         break;
2435                                 }
2436
2437                                 if ( SLAP_EVENT_IS_WRITE( i ) ) {
2438                                         Debug( LDAP_DEBUG_CONNS,
2439                                                 "daemon: write active on %d\n",
2440                                                 fd, 0, 0 );
2441
2442                                         SLAP_EVENT_CLR_WRITE( i );
2443
2444                                         /*
2445                                          * NOTE: it is possible that the connection was closed
2446                                          * and that the stream is now inactive.
2447                                          * connection_write() must valid the stream is still
2448                                          * active.
2449                                          */
2450                                         if ( connection_write( fd ) < 0 ) {
2451                                                 continue;
2452                                         }
2453                                 }
2454                                 /* If event is a read */
2455                                 if ( SLAP_EVENT_IS_READ( i ) ) {
2456                                         Debug( LDAP_DEBUG_CONNS,
2457                                                 "daemon: read active on %d\n",
2458                                                 fd, 0, 0 );
2459
2460                                         SLAP_EVENT_CLR_READ( i );
2461 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2462                                         connection_read_activate( fd );
2463 #else /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
2464                                         /*
2465                                          * NOTE: it is possible that the connection was closed
2466                                          * and that the stream is now inactive.
2467                                          * connection_read() must valid the stream is still
2468                                          * active.
2469                                          */
2470                                         connection_read( fd );
2471 #endif /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
2472                                 } else {
2473                                         Debug( LDAP_DEBUG_CONNS,
2474                                                 "daemon: hangup on %d\n", fd, 0, 0 );
2475                                 }
2476                         }
2477                 }
2478 #endif  /* SLAP_EVENTS_ARE_INDEXED */
2479
2480 #ifndef HAVE_YIELDING_SELECT
2481                 ldap_pvt_thread_yield();
2482 #endif /* ! HAVE_YIELDING_SELECT */
2483         }
2484
2485         if ( slapd_shutdown == 1 ) {
2486                 Debug( LDAP_DEBUG_ANY,
2487                         "daemon: shutdown requested and initiated.\n",
2488                         0, 0, 0 );
2489
2490         } else if ( slapd_shutdown == 2 ) {
2491 #ifdef HAVE_NT_SERVICE_MANAGER
2492                         Debug( LDAP_DEBUG_ANY,
2493                                "daemon: shutdown initiated by Service Manager.\n",
2494                                0, 0, 0);
2495 #else /* !HAVE_NT_SERVICE_MANAGER */
2496                         Debug( LDAP_DEBUG_ANY,
2497                                "daemon: abnormal condition, shutdown initiated.\n",
2498                                0, 0, 0 );
2499 #endif /* !HAVE_NT_SERVICE_MANAGER */
2500         } else {
2501                 Debug( LDAP_DEBUG_ANY,
2502                        "daemon: no active streams, shutdown initiated.\n",
2503                        0, 0, 0 );
2504         }
2505
2506         if ( slapd_gentle_shutdown != 2 ) close_listeners ( 0 );
2507
2508         if ( !slapd_gentle_shutdown ) {
2509                 slapd_abrupt_shutdown = 1;
2510                 connections_shutdown();
2511         }
2512
2513         Debug( LDAP_DEBUG_ANY,
2514                 "slapd shutdown: waiting for %d threads to terminate\n",
2515                 ldap_pvt_thread_pool_backload( &connection_pool ), 0, 0 );
2516         ldap_pvt_thread_pool_destroy( &connection_pool, 1 );
2517
2518         free( slap_listeners );
2519         slap_listeners = NULL;
2520
2521         return NULL;
2522 }
2523
2524
2525 #ifdef LDAP_CONNECTIONLESS
2526 static int
2527 connectionless_init( void )
2528 {
2529         int l;
2530
2531         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2532                 Listener *lr = slap_listeners[l];
2533                 Connection *c;
2534
2535                 if ( !lr->sl_is_udp ) {
2536                         continue;
2537                 }
2538
2539                 c = connection_init( lr->sl_sd, lr, "", "",
2540                         CONN_IS_UDP, (slap_ssf_t) 0, NULL );
2541
2542                 if ( !c ) {
2543                         Debug( LDAP_DEBUG_TRACE,
2544                                 "connectionless_init: failed on %s (%d)\n",
2545                                 lr->sl_url, lr->sl_sd, 0 );
2546                         return -1;
2547                 }
2548                 lr->sl_is_udp++;
2549         }
2550
2551         return 0;
2552 }
2553 #endif /* LDAP_CONNECTIONLESS */
2554
2555 int
2556 slapd_daemon( void )
2557 {
2558         int rc;
2559
2560         connections_init();
2561 #ifdef LDAP_CONNECTIONLESS
2562         connectionless_init();
2563 #endif /* LDAP_CONNECTIONLESS */
2564
2565 #define SLAPD_LISTENER_THREAD 1
2566 #if defined( SLAPD_LISTENER_THREAD )
2567         {
2568                 ldap_pvt_thread_t       listener_tid;
2569
2570                 /* listener as a separate THREAD */
2571                 rc = ldap_pvt_thread_create( &listener_tid,
2572                         0, slapd_daemon_task, NULL );
2573
2574                 if ( rc != 0 ) {
2575                         Debug( LDAP_DEBUG_ANY,
2576                         "listener ldap_pvt_thread_create failed (%d)\n", rc, 0, 0 );
2577                         return rc;
2578                 }
2579
2580                 /* wait for the listener thread to complete */
2581                 ldap_pvt_thread_join( listener_tid, (void *)NULL );
2582         }
2583 #else /* ! SLAPD_LISTENER_THREAD */
2584         /* experimental code */
2585         slapd_daemon_task( NULL );
2586 #endif /* ! SLAPD_LISTENER_THREAD */
2587
2588         return 0;
2589 }
2590
2591 static int
2592 sockinit( void )
2593 {
2594 #if defined( HAVE_WINSOCK2 )
2595         WORD wVersionRequested;
2596         WSADATA wsaData;
2597         int err;
2598
2599         wVersionRequested = MAKEWORD( 2, 0 );
2600
2601         err = WSAStartup( wVersionRequested, &wsaData );
2602         if ( err != 0 ) {
2603                 /* Tell the user that we couldn't find a usable */
2604                 /* WinSock DLL.                                  */
2605                 return -1;
2606         }
2607
2608         /* Confirm that the WinSock DLL supports 2.0.*/
2609         /* Note that if the DLL supports versions greater    */
2610         /* than 2.0 in addition to 2.0, it will still return */
2611         /* 2.0 in wVersion since that is the version we      */
2612         /* requested.                                        */
2613
2614         if ( LOBYTE( wsaData.wVersion ) != 2 ||
2615                 HIBYTE( wsaData.wVersion ) != 0 )
2616         {
2617             /* Tell the user that we couldn't find a usable */
2618             /* WinSock DLL.                                  */
2619             WSACleanup();
2620             return -1;
2621         }
2622
2623         /* The WinSock DLL is acceptable. Proceed. */
2624 #elif defined( HAVE_WINSOCK )
2625         WSADATA wsaData;
2626         if ( WSAStartup( 0x0101, &wsaData ) != 0 ) return -1;
2627 #endif /* ! HAVE_WINSOCK2 && ! HAVE_WINSOCK */
2628
2629         return 0;
2630 }
2631
2632 static int
2633 sockdestroy( void )
2634 {
2635 #if defined( HAVE_WINSOCK2 ) || defined( HAVE_WINSOCK )
2636         WSACleanup();
2637 #endif /* HAVE_WINSOCK2 || HAVE_WINSOCK */
2638         SLAP_SOCK_DESTROY;
2639
2640         return 0;
2641 }
2642
2643 RETSIGTYPE
2644 slap_sig_shutdown( int sig )
2645 {
2646 #if 0
2647         Debug(LDAP_DEBUG_TRACE, "slap_sig_shutdown: signal %d\n", sig, 0, 0);
2648 #endif
2649
2650         /*
2651          * If the NT Service Manager is controlling the server, we don't
2652          * want SIGBREAK to kill the server. For some strange reason,
2653          * SIGBREAK is generated when a user logs out.
2654          */
2655
2656 #if HAVE_NT_SERVICE_MANAGER && SIGBREAK
2657         if (is_NT_Service && sig == SIGBREAK) {
2658                 /* empty */;
2659         } else
2660 #endif /* HAVE_NT_SERVICE_MANAGER && SIGBREAK */
2661 #ifdef SIGHUP
2662         if (sig == SIGHUP && global_gentlehup && slapd_gentle_shutdown == 0) {
2663                 slapd_gentle_shutdown = 1;
2664         } else
2665 #endif /* SIGHUP */
2666         {
2667                 slapd_shutdown = 1;
2668         }
2669
2670         WAKE_LISTENER(1);
2671
2672         /* reinstall self */
2673         (void) SIGNAL_REINSTALL( sig, slap_sig_shutdown );
2674 }
2675
2676 RETSIGTYPE
2677 slap_sig_wake( int sig )
2678 {
2679         WAKE_LISTENER(1);
2680
2681         /* reinstall self */
2682         (void) SIGNAL_REINSTALL( sig, slap_sig_wake );
2683 }
2684
2685
2686 void
2687 slapd_add_internal( ber_socket_t s, int isactive )
2688 {
2689         slapd_add( s, isactive, NULL );
2690 }
2691
2692 Listener **
2693 slapd_get_listeners( void )
2694 {
2695         return slap_listeners;
2696 }
2697
2698 void
2699 slap_wake_listener()
2700 {
2701         WAKE_LISTENER(1);
2702 }