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 1998-2009 The OpenLDAP Foundation.
   5  * Portions Copyright 2007 by Howard Chu, Symas Corporation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  17  * All rights reserved.
  18  *
  19  * Redistribution and use in source and binary forms are permitted
  20  * provided that this notice is preserved and that due credit is given
  21  * to the University of Michigan at Ann Arbor. The name of the University
  22  * may not be used to endorse or promote products derived from this
  23  * software without specific prior written permission. This software
  24  * is provided ``as is'' without express or implied warranty.
  25  */
  26
  27 #include "portable.h"
  28
  29 #include <stdio.h>
  30
  31 #include <ac/ctype.h>
  32 #include <ac/errno.h>
  33 #include <ac/socket.h>
  34 #include <ac/string.h>
  35 #include <ac/time.h>
  36 #include <ac/unistd.h>
  37
  38 #include "slap.h"
  39 #include "ldap_pvt_thread.h"
  40 #include "lutil.h"
  41
  42 #include "ldap_rq.h"
  43
  44 #if defined(HAVE_SYS_EPOLL_H) && defined(HAVE_EPOLL)
  45 # include <sys/epoll.h>
  46 #elif defined(SLAP_X_DEVPOLL) && defined(HAVE_SYS_DEVPOLL_H) && defined(HAVE_DEVPOLL)
  47 # include <sys/types.h>
  48 # include <sys/stat.h>
  49 # include <fcntl.h>
  50 # include <sys/devpoll.h>
  51 #endif /* ! epoll && ! /dev/poll */
  52
  53 #ifdef HAVE_TCPD
  54 int allow_severity = LOG_INFO;
  55 int deny_severity = LOG_NOTICE;
  56 #endif /* TCP Wrappers */
  57
  58 #ifdef LDAP_PF_LOCAL
  59 # include <sys/stat.h>
  60 /* this should go in <ldap.h> as soon as it is accepted */
  61 # define LDAPI_MOD_URLEXT               "x-mod"
  62 #endif /* LDAP_PF_LOCAL */
  63
  64 #ifdef LDAP_PF_INET6
  65 int slap_inet4or6 = AF_UNSPEC;
  66 #else /* ! INETv6 */
  67 int slap_inet4or6 = AF_INET;
  68 #endif /* ! INETv6 */
  69
  70 /* globals */
  71 time_t starttime;
  72 ber_socket_t dtblsize;
  73 slap_ssf_t local_ssf = LDAP_PVT_SASL_LOCAL_SSF;
  74 struct runqueue_s slapd_rq;
  75
  76 #ifdef LDAP_TCP_BUFFER
  77 int slapd_tcp_rmem;
  78 int slapd_tcp_wmem;
  79 #endif /* LDAP_TCP_BUFFER */
  80
  81 Listener **slap_listeners = NULL;
  82
  83 #ifndef SLAPD_LISTEN_BACKLOG
  84 #define SLAPD_LISTEN_BACKLOG 1024
  85 #endif /* ! SLAPD_LISTEN_BACKLOG */
  86
  87 static ber_socket_t wake_sds[2]
  88 #ifdef HAVE_WINSOCK
  89         = { INVALID_SOCKET, INVALID_SOCKET }
  90 #endif /* HAVE_WINSOCK */
  91         ;
  92 static int emfile;
  93
  94 static time_t chk_writetime;
  95
  96 static volatile int waking;
  97 #ifdef NO_THREADS
  98 #define WAKE_LISTENER(w)        do { \
  99         if ((w) && ++waking < 5) { \
 100                 tcp_write( SLAP_FD2SOCK(wake_sds[1]), "0", 1 ); \
 101         } \
 102 } while (0)
 103 #else /* ! NO_THREADS */
 104 #define WAKE_LISTENER(w)        do { \
 105         if (w) { \
 106                 tcp_write( SLAP_FD2SOCK(wake_sds[1]), "0", 1 ); \
 107         } \
 108 } while (0)
 109 #endif /* ! NO_THREADS */
 110
 111 volatile sig_atomic_t slapd_shutdown = 0;
 112 volatile sig_atomic_t slapd_gentle_shutdown = 0;
 113 volatile sig_atomic_t slapd_abrupt_shutdown = 0;
 114
 115 #ifdef HAVE_WINSOCK
 116 ldap_pvt_thread_mutex_t slapd_ws_mutex;
 117 SOCKET *slapd_ws_sockets;
 118 #define SD_READ 1
 119 #define SD_WRITE        2
 120 #define SD_ACTIVE       4
 121 #define SD_LISTENER     8
 122 #endif
 123
 124 static struct slap_daemon {
 125         ldap_pvt_thread_mutex_t sd_mutex;
 126 #ifdef HAVE_TCPD
 127         ldap_pvt_thread_mutex_t sd_tcpd_mutex;
 128 #endif /* TCP Wrappers */
 129
 130         ber_socket_t            sd_nactives;
 131         int                     sd_nwriters;
 132         int                     sd_nfds;
 133
 134 #if defined(HAVE_EPOLL)
 135         struct epoll_event      *sd_epolls;
 136         int                     *sd_index;
 137         int                     sd_epfd;
 138 #elif defined(SLAP_X_DEVPOLL) && defined(HAVE_DEVPOLL)
 139         /* eXperimental */
 140         struct pollfd           *sd_pollfd;
 141         int                     *sd_index;
 142         Listener                **sd_l;
 143         int                     sd_dpfd;
 144 #else /* ! epoll && ! /dev/poll */
 145 #ifdef HAVE_WINSOCK
 146         char    *sd_flags;
 147         char    *sd_rflags;
 148 #else /* ! HAVE_WINSOCK */
 149         fd_set                  sd_actives;
 150         fd_set                  sd_readers;
 151         fd_set                  sd_writers;
 152 #endif /* ! HAVE_WINSOCK */
 153 #endif /* ! epoll && ! /dev/poll */
 154 } slap_daemon;
 155
 156 /*
 157  * NOTE: naming convention for macros:
 158  *
 159  * - SLAP_SOCK_* and SLAP_EVENT_* for public interface that deals
 160  *   with file descriptors and events respectively
 161  *
 162  * - SLAP_<type>_* for private interface; type by now is one of
 163  *   EPOLL, DEVPOLL, SELECT
 164  *
 165  * private interface should not be used in the code.
 166  */
 167 #if defined(HAVE_EPOLL)
 168 /***************************************
 169  * Use epoll infrastructure - epoll(4) *
 170  ***************************************/
 171 # define SLAP_EVENT_FNAME               "epoll"
 172 # define SLAP_EVENTS_ARE_INDEXED        0
 173 # define SLAP_EPOLL_SOCK_IX(s)          (slap_daemon.sd_index[(s)])
 174 # define SLAP_EPOLL_SOCK_EP(s)          (slap_daemon.sd_epolls[SLAP_EPOLL_SOCK_IX(s)])
 175 # define SLAP_EPOLL_SOCK_EV(s)          (SLAP_EPOLL_SOCK_EP(s).events)
 176 # define SLAP_SOCK_IS_ACTIVE(s)         (SLAP_EPOLL_SOCK_IX(s) != -1)
 177 # define SLAP_SOCK_NOT_ACTIVE(s)        (SLAP_EPOLL_SOCK_IX(s) == -1)
 178 # define SLAP_EPOLL_SOCK_IS_SET(s, mode)        (SLAP_EPOLL_SOCK_EV(s) & (mode))
 179
 180 # define SLAP_SOCK_IS_READ(s)           SLAP_EPOLL_SOCK_IS_SET((s), EPOLLIN)
 181 # define SLAP_SOCK_IS_WRITE(s)          SLAP_EPOLL_SOCK_IS_SET((s), EPOLLOUT)
 182
 183 # define SLAP_EPOLL_SOCK_SET(s, mode)   do { \
 184         if ( (SLAP_EPOLL_SOCK_EV(s) & (mode)) != (mode) ) {     \
 185                 SLAP_EPOLL_SOCK_EV(s) |= (mode); \
 186                 epoll_ctl( slap_daemon.sd_epfd, EPOLL_CTL_MOD, (s), \
 187                         &SLAP_EPOLL_SOCK_EP(s) ); \
 188         } \
 189 } while (0)
 190
 191 # define SLAP_EPOLL_SOCK_CLR(s, mode)   do { \
 192         if ( (SLAP_EPOLL_SOCK_EV(s) & (mode)) ) { \
 193                 SLAP_EPOLL_SOCK_EV(s) &= ~(mode);       \
 194                 epoll_ctl( slap_daemon.sd_epfd, EPOLL_CTL_MOD, s, \
 195                         &SLAP_EPOLL_SOCK_EP(s) ); \
 196         } \
 197 } while (0)
 198
 199 # define SLAP_SOCK_SET_READ(s)          SLAP_EPOLL_SOCK_SET(s, EPOLLIN)
 200 # define SLAP_SOCK_SET_WRITE(s)         SLAP_EPOLL_SOCK_SET(s, EPOLLOUT)
 201
 202 # define SLAP_SOCK_CLR_READ(s)          SLAP_EPOLL_SOCK_CLR((s), EPOLLIN)
 203 # define SLAP_SOCK_CLR_WRITE(s)         SLAP_EPOLL_SOCK_CLR((s), EPOLLOUT)
 204
 205 #  define SLAP_SOCK_SET_SUSPEND(s) \
 206         ( slap_daemon.sd_suspend[SLAP_EPOLL_SOCK_IX(s)] = 1 )
 207 #  define SLAP_SOCK_CLR_SUSPEND(s) \
 208         ( slap_daemon.sd_suspend[SLAP_EPOLL_SOCK_IX(s)] = 0 )
 209 #  define SLAP_SOCK_IS_SUSPEND(s) \
 210         ( slap_daemon.sd_suspend[SLAP_EPOLL_SOCK_IX(s)] == 1 )
 211
 212 # define SLAP_EPOLL_EVENT_CLR(i, mode)  (revents[(i)].events &= ~(mode))
 213
 214 # define SLAP_EVENT_MAX                 slap_daemon.sd_nfds
 215
 216 /* If a Listener address is provided, store that as the epoll data.
 217  * Otherwise, store the address of this socket's slot in the
 218  * index array. If we can't do this add, the system is out of
 219  * resources and we need to shutdown.
 220  */
 221 # define SLAP_SOCK_ADD(s, l)            do { \
 222         int rc; \
 223         SLAP_EPOLL_SOCK_IX((s)) = slap_daemon.sd_nfds; \
 224         SLAP_EPOLL_SOCK_EP((s)).data.ptr = (l) ? (l) : (void *)(&SLAP_EPOLL_SOCK_IX(s)); \
 225         SLAP_EPOLL_SOCK_EV((s)) = EPOLLIN; \
 226         rc = epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_ADD, \
 227                 (s), &SLAP_EPOLL_SOCK_EP((s))); \
 228         if ( rc == 0 ) { \
 229                 slap_daemon.sd_nfds++; \
 230         } else { \
 231                 Debug( LDAP_DEBUG_ANY, \
 232                         "daemon: epoll_ctl(ADD,fd=%d) failed, errno=%d, shutting down\n", \
 233                         s, errno, 0 ); \
 234                 slapd_shutdown = 2; \
 235         } \
 236 } while (0)
 237
 238 # define SLAP_EPOLL_EV_LISTENER(ptr) \
 239         (((int *)(ptr) >= slap_daemon.sd_index && \
 240         (int *)(ptr) <= &slap_daemon.sd_index[dtblsize]) ? 0 : 1 )
 241
 242 # define SLAP_EPOLL_EV_PTRFD(ptr)               (SLAP_EPOLL_EV_LISTENER(ptr) ? \
 243         ((Listener *)ptr)->sl_sd : \
 244         (ber_socket_t) ((int *)(ptr) - slap_daemon.sd_index))
 245
 246 # define SLAP_SOCK_DEL(s)               do { \
 247         int fd, rc, index = SLAP_EPOLL_SOCK_IX((s)); \
 248         if ( index < 0 ) break; \
 249         rc = epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_DEL, \
 250                 (s), &SLAP_EPOLL_SOCK_EP((s))); \
 251         slap_daemon.sd_epolls[index] = \
 252                 slap_daemon.sd_epolls[slap_daemon.sd_nfds-1]; \
 253         fd = SLAP_EPOLL_EV_PTRFD(slap_daemon.sd_epolls[index].data.ptr); \
 254         slap_daemon.sd_index[fd] = index; \
 255         slap_daemon.sd_index[(s)] = -1; \
 256         slap_daemon.sd_nfds--; \
 257 } while (0)
 258
 259 # define SLAP_EVENT_CLR_READ(i)         SLAP_EPOLL_EVENT_CLR((i), EPOLLIN)
 260 # define SLAP_EVENT_CLR_WRITE(i)        SLAP_EPOLL_EVENT_CLR((i), EPOLLOUT)
 261
 262 # define SLAP_EPOLL_EVENT_CHK(i, mode)  (revents[(i)].events & mode)
 263
 264 # define SLAP_EVENT_IS_READ(i)          SLAP_EPOLL_EVENT_CHK((i), EPOLLIN)
 265 # define SLAP_EVENT_IS_WRITE(i)         SLAP_EPOLL_EVENT_CHK((i), EPOLLOUT)
 266 # define SLAP_EVENT_IS_LISTENER(i)      SLAP_EPOLL_EV_LISTENER(revents[(i)].data.ptr)
 267 # define SLAP_EVENT_LISTENER(i)         ((Listener *)(revents[(i)].data.ptr))
 268
 269 # define SLAP_EVENT_FD(i)               SLAP_EPOLL_EV_PTRFD(revents[(i)].data.ptr)
 270
 271 # define SLAP_SOCK_INIT         do { \
 272         slap_daemon.sd_epolls = ch_calloc(1, \
 273                 ( sizeof(struct epoll_event) * 2 \
 274                         + sizeof(int) ) * dtblsize * 2); \
 275         slap_daemon.sd_index = (int *)&slap_daemon.sd_epolls[ 2 * dtblsize ]; \
 276         slap_daemon.sd_epfd = epoll_create( dtblsize ); \
 277         for ( i = 0; i < dtblsize; i++ ) slap_daemon.sd_index[i] = -1; \
 278 } while (0)
 279
 280 # define SLAP_SOCK_DESTROY              do { \
 281         if ( slap_daemon.sd_epolls != NULL ) { \
 282                 ch_free( slap_daemon.sd_epolls ); \
 283                 slap_daemon.sd_epolls = NULL; \
 284                 slap_daemon.sd_index = NULL; \
 285                 close( slap_daemon.sd_epfd ); \
 286         } \
 287 } while ( 0 )
 288
 289 # define SLAP_EVENT_DECL                struct epoll_event *revents
 290
 291 # define SLAP_EVENT_INIT                do { \
 292         revents = slap_daemon.sd_epolls + dtblsize; \
 293 } while (0)
 294
 295 # define SLAP_EVENT_WAIT(tvp, nsp)      do { \
 296         *(nsp) = epoll_wait( slap_daemon.sd_epfd, revents, \
 297                 dtblsize, (tvp) ? (tvp)->tv_sec * 1000 : -1 ); \
 298 } while (0)
 299
 300 #elif defined(SLAP_X_DEVPOLL) && defined(HAVE_DEVPOLL)
 301
 302 /*************************************************************
 303  * Use Solaris' (>= 2.7) /dev/poll infrastructure - poll(7d) *
 304  *************************************************************/
 305 # define SLAP_EVENT_FNAME               "/dev/poll"
 306 # define SLAP_EVENTS_ARE_INDEXED        0
 307 /*
 308  * - sd_index   is used much like with epoll()
 309  * - sd_l       is maintained as an array containing the address
 310  *              of the listener; the index is the fd itself
 311  * - sd_pollfd  is used to keep track of what data has been
 312  *              registered in /dev/poll
 313  */
 314 # define SLAP_DEVPOLL_SOCK_IX(s)        (slap_daemon.sd_index[(s)])
 315 # define SLAP_DEVPOLL_SOCK_LX(s)        (slap_daemon.sd_l[(s)])
 316 # define SLAP_DEVPOLL_SOCK_EP(s)        (slap_daemon.sd_pollfd[SLAP_DEVPOLL_SOCK_IX((s))])
 317 # define SLAP_DEVPOLL_SOCK_FD(s)        (SLAP_DEVPOLL_SOCK_EP((s)).fd)
 318 # define SLAP_DEVPOLL_SOCK_EV(s)        (SLAP_DEVPOLL_SOCK_EP((s)).events)
 319 # define SLAP_SOCK_IS_ACTIVE(s)         (SLAP_DEVPOLL_SOCK_IX((s)) != -1)
 320 # define SLAP_SOCK_NOT_ACTIVE(s)        (SLAP_DEVPOLL_SOCK_IX((s)) == -1)
 321 # define SLAP_SOCK_IS_SET(s, mode)      (SLAP_DEVPOLL_SOCK_EV((s)) & (mode))
 322
 323 # define SLAP_SOCK_IS_READ(s)           SLAP_SOCK_IS_SET((s), POLLIN)
 324 # define SLAP_SOCK_IS_WRITE(s)          SLAP_SOCK_IS_SET((s), POLLOUT)
 325
 326 /* as far as I understand, any time we need to communicate with the kernel
 327  * about the number and/or properties of a file descriptor we need it to
 328  * wait for, we have to rewrite the whole set */
 329 # define SLAP_DEVPOLL_WRITE_POLLFD(s, pfd, n, what, shdn)       do { \
 330         int rc; \
 331         size_t size = (n) * sizeof( struct pollfd ); \
 332         /* FIXME: use pwrite? */ \
 333         rc = write( slap_daemon.sd_dpfd, (pfd), size ); \
 334         if ( rc != size ) { \
 335                 Debug( LDAP_DEBUG_ANY, "daemon: " SLAP_EVENT_FNAME ": " \
 336                         "%s fd=%d failed errno=%d\n", \
 337                         (what), (s), errno ); \
 338                 if ( (shdn) ) { \
 339                         slapd_shutdown = 2; \
 340                 } \
 341         } \
 342 } while (0)
 343
 344 # define SLAP_DEVPOLL_SOCK_SET(s, mode)         do { \
 345         Debug( LDAP_DEBUG_CONNS, "SLAP_SOCK_SET_%s(%d)=%d\n", \
 346                 (mode) == POLLIN ? "READ" : "WRITE", (s), \
 347                 ( (SLAP_DEVPOLL_SOCK_EV((s)) & (mode)) != (mode) ) ); \
 348         if ( (SLAP_DEVPOLL_SOCK_EV((s)) & (mode)) != (mode) ) { \
 349                 struct pollfd pfd; \
 350                 SLAP_DEVPOLL_SOCK_EV((s)) |= (mode); \
 351                 pfd.fd = SLAP_DEVPOLL_SOCK_FD((s)); \
 352                 pfd.events = /* (mode) */ SLAP_DEVPOLL_SOCK_EV((s)); \
 353                 SLAP_DEVPOLL_WRITE_POLLFD((s), &pfd, 1, "SET", 0); \
 354         } \
 355 } while (0)
 356
 357 # define SLAP_DEVPOLL_SOCK_CLR(s, mode)         do { \
 358         Debug( LDAP_DEBUG_CONNS, "SLAP_SOCK_CLR_%s(%d)=%d\n", \
 359                 (mode) == POLLIN ? "READ" : "WRITE", (s), \
 360                 ( (SLAP_DEVPOLL_SOCK_EV((s)) & (mode)) == (mode) ) ); \
 361         if ((SLAP_DEVPOLL_SOCK_EV((s)) & (mode)) == (mode) ) { \
 362                 struct pollfd pfd[2]; \
 363                 SLAP_DEVPOLL_SOCK_EV((s)) &= ~(mode); \
 364                 pfd[0].fd = SLAP_DEVPOLL_SOCK_FD((s)); \
 365                 pfd[0].events = POLLREMOVE; \
 366                 pfd[1] = SLAP_DEVPOLL_SOCK_EP((s)); \
 367                 SLAP_DEVPOLL_WRITE_POLLFD((s), &pfd[0], 2, "CLR", 0); \
 368         } \
 369 } while (0)
 370
 371 # define SLAP_SOCK_SET_READ(s)          SLAP_DEVPOLL_SOCK_SET(s, POLLIN)
 372 # define SLAP_SOCK_SET_WRITE(s)         SLAP_DEVPOLL_SOCK_SET(s, POLLOUT)
 373
 374 # define SLAP_SOCK_CLR_READ(s)          SLAP_DEVPOLL_SOCK_CLR((s), POLLIN)
 375 # define SLAP_SOCK_CLR_WRITE(s)         SLAP_DEVPOLL_SOCK_CLR((s), POLLOUT)
 376
 377 #  define SLAP_SOCK_SET_SUSPEND(s) \
 378         ( slap_daemon.sd_suspend[SLAP_DEVPOLL_SOCK_IX((s))] = 1 )
 379 #  define SLAP_SOCK_CLR_SUSPEND(s) \
 380         ( slap_daemon.sd_suspend[SLAP_DEVPOLL_SOCK_IX((s))] = 0 )
 381 #  define SLAP_SOCK_IS_SUSPEND(s) \
 382         ( slap_daemon.sd_suspend[SLAP_DEVPOLL_SOCK_IX((s))] == 1 )
 383
 384 # define SLAP_DEVPOLL_EVENT_CLR(i, mode)        (revents[(i)].events &= ~(mode))
 385
 386 # define SLAP_EVENT_MAX                 slap_daemon.sd_nfds
 387
 388 /* If a Listener address is provided, store that in the sd_l array.
 389  * If we can't do this add, the system is out of resources and we
 390  * need to shutdown.
 391  */
 392 # define SLAP_SOCK_ADD(s, l)            do { \
 393         Debug( LDAP_DEBUG_CONNS, "SLAP_SOCK_ADD(%d, %p)\n", (s), (l), 0 ); \
 394         SLAP_DEVPOLL_SOCK_IX((s)) = slap_daemon.sd_nfds; \
 395         SLAP_DEVPOLL_SOCK_LX((s)) = (l); \
 396         SLAP_DEVPOLL_SOCK_FD((s)) = (s); \
 397         SLAP_DEVPOLL_SOCK_EV((s)) = POLLIN; \
 398         SLAP_DEVPOLL_WRITE_POLLFD((s), &SLAP_DEVPOLL_SOCK_EP((s)), 1, "ADD", 1); \
 399         slap_daemon.sd_nfds++; \
 400 } while (0)
 401
 402 # define SLAP_DEVPOLL_EV_LISTENER(ptr)  ((ptr) != NULL)
 403
 404 # define SLAP_SOCK_DEL(s)               do { \
 405         int fd, index = SLAP_DEVPOLL_SOCK_IX((s)); \
 406         Debug( LDAP_DEBUG_CONNS, "SLAP_SOCK_DEL(%d)\n", (s), 0, 0 ); \
 407         if ( index < 0 ) break; \
 408         if ( index < slap_daemon.sd_nfds - 1 ) { \
 409                 struct pollfd pfd = slap_daemon.sd_pollfd[index]; \
 410                 fd = slap_daemon.sd_pollfd[slap_daemon.sd_nfds - 1].fd; \
 411                 slap_daemon.sd_pollfd[index] = slap_daemon.sd_pollfd[slap_daemon.sd_nfds - 1]; \
 412                 slap_daemon.sd_pollfd[slap_daemon.sd_nfds - 1] = pfd; \
 413                 slap_daemon.sd_index[fd] = index; \
 414         } \
 415         slap_daemon.sd_index[(s)] = -1; \
 416         slap_daemon.sd_pollfd[slap_daemon.sd_nfds - 1].events = POLLREMOVE; \
 417         SLAP_DEVPOLL_WRITE_POLLFD((s), &slap_daemon.sd_pollfd[slap_daemon.sd_nfds - 1], 1, "DEL", 0); \
 418         slap_daemon.sd_pollfd[slap_daemon.sd_nfds - 1].events = 0; \
 419         slap_daemon.sd_nfds--; \
 420 } while (0)
 421
 422 # define SLAP_EVENT_CLR_READ(i)         SLAP_DEVPOLL_EVENT_CLR((i), POLLIN)
 423 # define SLAP_EVENT_CLR_WRITE(i)        SLAP_DEVPOLL_EVENT_CLR((i), POLLOUT)
 424
 425 # define SLAP_DEVPOLL_EVENT_CHK(i, mode)        (revents[(i)].events & (mode))
 426
 427 # define SLAP_EVENT_FD(i)               (revents[(i)].fd)
 428
 429 # define SLAP_EVENT_IS_READ(i)          SLAP_DEVPOLL_EVENT_CHK((i), POLLIN)
 430 # define SLAP_EVENT_IS_WRITE(i)         SLAP_DEVPOLL_EVENT_CHK((i), POLLOUT)
 431 # define SLAP_EVENT_IS_LISTENER(i)      SLAP_DEVPOLL_EV_LISTENER(SLAP_DEVPOLL_SOCK_LX(SLAP_EVENT_FD((i))))
 432 # define SLAP_EVENT_LISTENER(i)         SLAP_DEVPOLL_SOCK_LX(SLAP_EVENT_FD((i)))
 433
 434 # define SLAP_SOCK_INIT         do { \
 435         slap_daemon.sd_pollfd = ch_calloc( 1, \
 436                 ( sizeof(struct pollfd) * 2 \
 437                         + sizeof( int ) \
 438                         + sizeof( Listener * ) ) * dtblsize ); \
 439         slap_daemon.sd_index = (int *)&slap_daemon.sd_pollfd[ 2 * dtblsize ]; \
 440         slap_daemon.sd_l = (Listener **)&slap_daemon.sd_index[ dtblsize ]; \
 441         slap_daemon.sd_dpfd = open( SLAP_EVENT_FNAME, O_RDWR ); \
 442         if ( slap_daemon.sd_dpfd == -1 ) { \
 443                 Debug( LDAP_DEBUG_ANY, "daemon: " SLAP_EVENT_FNAME ": " \
 444                         "open(\"" SLAP_EVENT_FNAME "\") failed errno=%d\n", \
 445                         errno, 0, 0 ); \
 446                 SLAP_SOCK_DESTROY; \
 447                 return -1; \
 448         } \
 449         for ( i = 0; i < dtblsize; i++ ) { \
 450                 slap_daemon.sd_pollfd[i].fd = -1; \
 451                 slap_daemon.sd_index[i] = -1; \
 452         } \
 453 } while (0)
 454
 455 # define SLAP_SOCK_DESTROY              do { \
 456         if ( slap_daemon.sd_pollfd != NULL ) { \
 457                 ch_free( slap_daemon.sd_pollfd ); \
 458                 slap_daemon.sd_pollfd = NULL; \
 459                 slap_daemon.sd_index = NULL; \
 460                 slap_daemon.sd_l = NULL; \
 461                 close( slap_daemon.sd_dpfd ); \
 462         } \
 463 } while ( 0 )
 464
 465 # define SLAP_EVENT_DECL                struct pollfd *revents
 466
 467 # define SLAP_EVENT_INIT                do { \
 468         revents = &slap_daemon.sd_pollfd[ dtblsize ]; \
 469 } while (0)
 470
 471 # define SLAP_EVENT_WAIT(tvp, nsp)      do { \
 472         struct dvpoll           sd_dvpoll; \
 473         sd_dvpoll.dp_timeout = (tvp) ? (tvp)->tv_sec * 1000 : -1; \
 474         sd_dvpoll.dp_nfds = dtblsize; \
 475         sd_dvpoll.dp_fds = revents; \
 476         *(nsp) = ioctl( slap_daemon.sd_dpfd, DP_POLL, &sd_dvpoll ); \
 477 } while (0)
 478
 479 #else /* ! epoll && ! /dev/poll */
 480 # ifdef HAVE_WINSOCK
 481 # define SLAP_EVENT_FNAME               "WSselect"
 482 /* Winsock provides a "select" function but its fd_sets are
 483  * actually arrays of sockets. Since these sockets are handles
 484  * and not a contiguous range of small integers, we manage our
 485  * own "fd" table of socket handles and use their indices as
 486  * descriptors.
 487  *
 488  * All of our listener/connection structures use fds; the actual
 489  * I/O functions use sockets. The SLAP_FD2SOCK macro in proto-slap.h
 490  * handles the mapping.
 491  *
 492  * Despite the mapping overhead, this is about 45% more efficient
 493  * than just using Winsock's select and FD_ISSET directly.
 494  *
 495  * Unfortunately Winsock's select implementation doesn't scale well
 496  * as the number of connections increases. This probably needs to be
 497  * rewritten to use the Winsock overlapped/asynchronous I/O functions.
 498  */
 499 # define SLAP_EVENTS_ARE_INDEXED        1
 500 # define SLAP_EVENT_DECL                fd_set readfds, writefds
 501 # define SLAP_EVENT_INIT        do { \
 502         int i; \
 503         FD_ZERO( &readfds ); \
 504         FD_ZERO( &writefds ); \
 505         memset( slap_daemon.sd_rflags, 0, slap_daemon.sd_nfds ); \
 506         for ( i=0; i<slap_daemon.sd_nfds; i++ ) { \
 507                 if ( slap_daemon.sd_flags[i] & SD_READ ) \
 508                         FD_SET( slapd_ws_sockets[i], &readfds );\
 509                 if ( slap_daemon.sd_flags[i] & SD_WRITE ) \
 510                         FD_SET( slapd_ws_sockets[i], &writefds ); \
 511         } } while ( 0 )
 512
 513 # define SLAP_EVENT_MAX         slap_daemon.sd_nfds
 514
 515 # define SLAP_EVENT_WAIT(tvp, nsp)      do { \
 516         int i; \
 517         *(nsp) = select( SLAP_EVENT_MAX, &readfds, \
 518                 nwriters > 0 ? &writefds : NULL, NULL, (tvp) ); \
 519         for ( i=0; i<readfds.fd_count; i++) { \
 520                 int fd = slapd_sock2fd(readfds.fd_array[i]); \
 521                 if ( fd >= 0 ) { \
 522                         slap_daemon.sd_rflags[fd] = SD_READ; \
 523                         if ( fd >= *(nsp)) *(nsp) = fd+1; \
 524                 } \
 525         } \
 526         for ( i=0; i<writefds.fd_count; i++) { \
 527                 int fd = slapd_sock2fd(writefds.fd_array[i]); \
 528                 if ( fd >= 0 ) { \
 529                         slap_daemon.sd_rflags[fd] = SD_WRITE; \
 530                         if ( fd >= *(nsp)) *(nsp) = fd+1; \
 531                 } \
 532         } \
 533 } while (0)
 534
 535 # define SLAP_EVENT_IS_READ(fd)         (slap_daemon.sd_rflags[fd] & SD_READ)
 536 # define SLAP_EVENT_IS_WRITE(fd)        (slap_daemon.sd_rflags[fd] & SD_WRITE)
 537
 538 # define SLAP_EVENT_CLR_READ(fd)        slap_daemon.sd_rflags[fd] &= ~SD_READ;
 539 # define SLAP_EVENT_CLR_WRITE(fd)       slap_daemon.sd_rflags[fd] &= ~SD_WRITE;
 540
 541 # define SLAP_SOCK_INIT         do { \
 542         ldap_pvt_thread_mutex_init( &slapd_ws_mutex ); \
 543         slapd_ws_sockets = ch_malloc( dtblsize * ( sizeof(SOCKET) + 2)); \
 544         slap_daemon.sd_flags = (char *)(slapd_ws_sockets + dtblsize); \
 545         slap_daemon.sd_rflags = slap_daemon.sd_flags + dtblsize; \
 546         memset( slapd_ws_sockets, -1, dtblsize * sizeof(SOCKET) ); \
 547         memset( slap_daemon.sd_flags, 0, dtblsize ); \
 548         slapd_ws_sockets[0] = wake_sds[0]; \
 549         slapd_ws_sockets[1] = wake_sds[1]; \
 550         wake_sds[0] = 0; \
 551         wake_sds[1] = 1; \
 552         slap_daemon.sd_nfds = 2; \
 553         } while ( 0 )
 554
 555 # define SLAP_SOCK_DESTROY      do { \
 556         ch_free( slapd_ws_sockets ); slapd_ws_sockets = NULL; \
 557         slap_daemon.sd_flags = NULL; \
 558         slap_daemon.sd_rflags = NULL; \
 559         ldap_pvt_thread_mutex_destroy( &slapd_ws_mutex ); \
 560         } while ( 0 )
 561
 562 # define SLAP_SOCK_IS_ACTIVE(fd) ( slap_daemon.sd_flags[fd] & SD_ACTIVE )
 563 # define SLAP_SOCK_IS_READ(fd) ( slap_daemon.sd_flags[fd] & SD_READ )
 564 # define SLAP_SOCK_IS_WRITE(fd) ( slap_daemon.sd_flags[fd] & SD_WRITE )
 565 # define SLAP_SOCK_NOT_ACTIVE(fd)       (!slap_daemon.sd_flags[fd])
 566
 567 # define SLAP_SOCK_SET_READ(fd)         ( slap_daemon.sd_flags[fd] |= SD_READ )
 568 # define SLAP_SOCK_SET_WRITE(fd)                ( slap_daemon.sd_flags[fd] |= SD_WRITE )
 569
 570 # define SLAP_SELECT_ADDTEST(s) do { \
 571         if ((s) >= slap_daemon.sd_nfds) slap_daemon.sd_nfds = (s)+1; \
 572 } while (0)
 573
 574 # define SLAP_SOCK_CLR_READ(fd)         ( slap_daemon.sd_flags[fd] &= ~SD_READ )
 575 # define SLAP_SOCK_CLR_WRITE(fd)                ( slap_daemon.sd_flags[fd] &= ~SD_WRITE )
 576
 577 # define SLAP_SOCK_ADD(s, l)    do { \
 578         SLAP_SELECT_ADDTEST((s)); \
 579         slap_daemon.sd_flags[s] = SD_ACTIVE|SD_READ; \
 580 } while ( 0 )
 581
 582 # define SLAP_SOCK_DEL(s) do { \
 583         slap_daemon.sd_flags[s] = 0; \
 584         slapd_sockdel( s ); \
 585 } while ( 0 )
 586
 587 # else /* !HAVE_WINSOCK */
 588
 589 /**************************************
 590  * Use select system call - select(2) *
 591  **************************************/
 592 # define SLAP_EVENT_FNAME               "select"
 593 /* select */
 594 # define SLAP_EVENTS_ARE_INDEXED        1
 595 # define SLAP_EVENT_DECL                fd_set readfds, writefds
 596
 597 # define SLAP_EVENT_INIT                do { \
 598         AC_MEMCPY( &readfds, &slap_daemon.sd_readers, sizeof(fd_set) ); \
 599         if ( nwriters ) { \
 600                 AC_MEMCPY( &writefds, &slap_daemon.sd_writers, sizeof(fd_set) ); \
 601         } else { \
 602                 FD_ZERO( &writefds ); \
 603         } \
 604 } while (0)
 605
 606 # ifdef FD_SETSIZE
 607 #  define SLAP_SELECT_CHK_SETSIZE       do { \
 608         if (dtblsize > FD_SETSIZE) dtblsize = FD_SETSIZE; \
 609 } while (0)
 610 # else /* ! FD_SETSIZE */
 611 #  define SLAP_SELECT_CHK_SETSIZE       do { ; } while (0)
 612 # endif /* ! FD_SETSIZE */
 613
 614 # define SLAP_SOCK_INIT                 do { \
 615         SLAP_SELECT_CHK_SETSIZE; \
 616         FD_ZERO(&slap_daemon.sd_actives); \
 617         FD_ZERO(&slap_daemon.sd_readers); \
 618         FD_ZERO(&slap_daemon.sd_writers); \
 619 } while (0)
 620
 621 # define SLAP_SOCK_DESTROY
 622
 623 # define SLAP_SOCK_IS_ACTIVE(fd)        FD_ISSET((fd), &slap_daemon.sd_actives)
 624 # define SLAP_SOCK_IS_READ(fd)          FD_ISSET((fd), &slap_daemon.sd_readers)
 625 # define SLAP_SOCK_IS_WRITE(fd)         FD_ISSET((fd), &slap_daemon.sd_writers)
 626
 627 # define SLAP_SOCK_NOT_ACTIVE(fd)       (!SLAP_SOCK_IS_ACTIVE(fd) && \
 628          !SLAP_SOCK_IS_READ(fd) && !SLAP_SOCK_IS_WRITE(fd))
 629
 630 # define SLAP_SOCK_SET_READ(fd) FD_SET((fd), &slap_daemon.sd_readers)
 631 # define SLAP_SOCK_SET_WRITE(fd)        FD_SET((fd), &slap_daemon.sd_writers)
 632
 633 # define SLAP_EVENT_MAX         slap_daemon.sd_nfds
 634 # define SLAP_SELECT_ADDTEST(s) do { \
 635         if ((s) >= slap_daemon.sd_nfds) slap_daemon.sd_nfds = (s)+1; \
 636 } while (0)
 637
 638 # define SLAP_SOCK_CLR_READ(fd)         FD_CLR((fd), &slap_daemon.sd_readers)
 639 # define SLAP_SOCK_CLR_WRITE(fd)        FD_CLR((fd), &slap_daemon.sd_writers)
 640
 641 # define SLAP_SOCK_ADD(s, l)            do { \
 642         SLAP_SELECT_ADDTEST((s)); \
 643         FD_SET((s), &slap_daemon.sd_actives); \
 644         FD_SET((s), &slap_daemon.sd_readers); \
 645 } while (0)
 646
 647 # define SLAP_SOCK_DEL(s)               do { \
 648         FD_CLR((s), &slap_daemon.sd_actives); \
 649         FD_CLR((s), &slap_daemon.sd_readers); \
 650         FD_CLR((s), &slap_daemon.sd_writers); \
 651 } while (0)
 652
 653 # define SLAP_EVENT_IS_READ(fd)         FD_ISSET((fd), &readfds)
 654 # define SLAP_EVENT_IS_WRITE(fd)        FD_ISSET((fd), &writefds)
 655
 656 # define SLAP_EVENT_CLR_READ(fd)        FD_CLR((fd), &readfds)
 657 # define SLAP_EVENT_CLR_WRITE(fd)       FD_CLR((fd), &writefds)
 658
 659 # define SLAP_EVENT_WAIT(tvp, nsp)      do { \
 660         *(nsp) = select( SLAP_EVENT_MAX, &readfds, \
 661                 nwriters > 0 ? &writefds : NULL, NULL, (tvp) ); \
 662 } while (0)
 663 # endif /* !HAVE_WINSOCK */
 664 #endif /* ! epoll && ! /dev/poll */
 665
 666 #ifdef HAVE_SLP
 667 /*
 668  * SLP related functions
 669  */
 670 #include <slp.h>
 671
 672 #define LDAP_SRVTYPE_PREFIX "service:ldap://"
 673 #define LDAPS_SRVTYPE_PREFIX "service:ldaps://"
 674 static char** slapd_srvurls = NULL;
 675 static SLPHandle slapd_hslp = 0;
 676 int slapd_register_slp = 0;
 677 const char *slapd_slp_attrs = NULL;
 678
 679 static SLPError slapd_slp_cookie;
 680
 681 static void
 682 slapd_slp_init( const char* urls )
 683 {
 684         int i;
 685         SLPError err;
 686
 687         slapd_srvurls = ldap_str2charray( urls, " " );
 688
 689         if ( slapd_srvurls == NULL ) return;
 690
 691         /* find and expand INADDR_ANY URLs */
 692         for ( i = 0; slapd_srvurls[i] != NULL; i++ ) {
 693                 if ( strcmp( slapd_srvurls[i], "ldap:///" ) == 0 ) {
 694                         slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i],
 695                                 global_host_bv.bv_len +
 696                                 sizeof( LDAP_SRVTYPE_PREFIX ) );
 697                         strcpy( lutil_strcopy(slapd_srvurls[i],
 698                                 LDAP_SRVTYPE_PREFIX ), global_host_bv.bv_val );
 699                 } else if ( strcmp( slapd_srvurls[i], "ldaps:///" ) == 0 ) {
 700                         slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i],
 701                                 global_host_bv.bv_len +
 702                                 sizeof( LDAPS_SRVTYPE_PREFIX ) );
 703                         strcpy( lutil_strcopy(slapd_srvurls[i],
 704                                 LDAPS_SRVTYPE_PREFIX ), global_host_bv.bv_val );
 705                 }
 706         }
 707
 708         /* open the SLP handle */
 709         err = SLPOpen( "en", 0, &slapd_hslp );
 710
 711         if ( err != SLP_OK ) {
 712                 Debug( LDAP_DEBUG_CONNS, "daemon: SLPOpen() failed with %ld\n",
 713                         (long)err, 0, 0 );
 714         }
 715 }
 716
 717 static void
 718 slapd_slp_deinit( void )
 719 {
 720         if ( slapd_srvurls == NULL ) return;
 721
 722         ldap_charray_free( slapd_srvurls );
 723         slapd_srvurls = NULL;
 724
 725         /* close the SLP handle */
 726         SLPClose( slapd_hslp );
 727 }
 728
 729 static void
 730 slapd_slp_regreport(
 731         SLPHandle       hslp,
 732         SLPError        errcode,
 733         void            *cookie )
 734 {
 735         /* return the error code in the cookie */
 736         *(SLPError*)cookie = errcode;
 737 }
 738
 739 static void
 740 slapd_slp_reg()
 741 {
 742         int i;
 743         SLPError err;
 744
 745         if ( slapd_srvurls == NULL ) return;
 746
 747         for ( i = 0; slapd_srvurls[i] != NULL; i++ ) {
 748                 if ( strncmp( slapd_srvurls[i], LDAP_SRVTYPE_PREFIX,
 749                                 sizeof( LDAP_SRVTYPE_PREFIX ) - 1 ) == 0 ||
 750                         strncmp( slapd_srvurls[i], LDAPS_SRVTYPE_PREFIX,
 751                                 sizeof( LDAPS_SRVTYPE_PREFIX ) - 1 ) == 0 )
 752                 {
 753                         err = SLPReg( slapd_hslp,
 754                                 slapd_srvurls[i],
 755                                 SLP_LIFETIME_MAXIMUM,
 756                                 "ldap",
 757                                 (slapd_slp_attrs) ? slapd_slp_attrs : "",
 758                                 SLP_TRUE,
 759                                 slapd_slp_regreport,
 760                                 &slapd_slp_cookie );
 761
 762                         if ( err != SLP_OK || slapd_slp_cookie != SLP_OK ) {
 763                                 Debug( LDAP_DEBUG_CONNS,
 764                                         "daemon: SLPReg(%s) failed with %ld, cookie = %ld\n",
 765                                         slapd_srvurls[i], (long)err, (long)slapd_slp_cookie );
 766                         }
 767                 }
 768         }
 769 }
 770
 771 static void
 772 slapd_slp_dereg( void )
 773 {
 774         int i;
 775         SLPError err;
 776
 777         if ( slapd_srvurls == NULL ) return;
 778
 779         for ( i = 0; slapd_srvurls[i] != NULL; i++ ) {
 780                 err = SLPDereg( slapd_hslp,
 781                         slapd_srvurls[i],
 782                         slapd_slp_regreport,
 783                         &slapd_slp_cookie );
 784
 785                 if ( err != SLP_OK || slapd_slp_cookie != SLP_OK ) {
 786                         Debug( LDAP_DEBUG_CONNS,
 787                                 "daemon: SLPDereg(%s) failed with %ld, cookie = %ld\n",
 788                                 slapd_srvurls[i], (long)err, (long)slapd_slp_cookie );
 789                 }
 790         }
 791 }
 792 #endif /* HAVE_SLP */
 793
 794 #ifdef HAVE_WINSOCK
 795 /* Manage the descriptor to socket table */
 796 ber_socket_t
 797 slapd_socknew( ber_socket_t s )
 798 {
 799         ber_socket_t i;
 800         ldap_pvt_thread_mutex_lock( &slapd_ws_mutex );
 801         for ( i = 0; i < dtblsize && slapd_ws_sockets[i] != INVALID_SOCKET; i++ );
 802         if ( i == dtblsize ) {
 803                 WSASetLastError( WSAEMFILE );
 804         } else {
 805                 slapd_ws_sockets[i] = s;
 806         }
 807         ldap_pvt_thread_mutex_unlock( &slapd_ws_mutex );
 808         return i;
 809 }
 810
 811 void
 812 slapd_sockdel( ber_socket_t s )
 813 {
 814         ldap_pvt_thread_mutex_lock( &slapd_ws_mutex );
 815         slapd_ws_sockets[s] = INVALID_SOCKET;
 816         ldap_pvt_thread_mutex_unlock( &slapd_ws_mutex );
 817 }
 818
 819 ber_socket_t
 820 slapd_sock2fd( ber_socket_t s )
 821 {
 822         ber_socket_t i;
 823         for ( i=0; i<dtblsize && slapd_ws_sockets[i] != s; i++);
 824         if ( i == dtblsize )
 825                 i = -1;
 826         return i;
 827 }
 828 #endif
 829
 830 /*
 831  * Add a descriptor to daemon control
 832  *
 833  * If isactive, the descriptor is a live server session and is subject
 834  * to idletimeout control. Otherwise, the descriptor is a passive
 835  * listener or an outbound client session, and not subject to
 836  * idletimeout. The underlying event handler may record the Listener
 837  * argument to differentiate Listener's from real sessions.
 838  */
 839 static void
 840 slapd_add( ber_socket_t s, int isactive, Listener *sl )
 841 {
 842         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 843
 844         assert( SLAP_SOCK_NOT_ACTIVE(s) );
 845
 846         if ( isactive ) slap_daemon.sd_nactives++;
 847
 848         SLAP_SOCK_ADD(s, sl);
 849
 850         Debug( LDAP_DEBUG_CONNS, "daemon: added %ldr%s listener=%p\n",
 851                 (long) s, isactive ? " (active)" : "", (void *)sl );
 852
 853         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 854
 855         WAKE_LISTENER(1);
 856 }
 857
 858 /*
 859  * NOTE: unused
 860  */
 861 void
 862 slapd_sd_lock( void )
 863 {
 864         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 865 }
 866
 867 /*
 868  * NOTE: unused
 869  */
 870 void
 871 slapd_sd_unlock( void )
 872 {
 873         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 874 }
 875
 876 /*
 877  * Remove the descriptor from daemon control
 878  */
 879 void
 880 slapd_remove(
 881         ber_socket_t s,
 882         Sockbuf *sb,
 883         int wasactive,
 884         int wake,
 885         int locked )
 886 {
 887         int waswriter;
 888         int wasreader;
 889
 890         if ( !locked )
 891                 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 892
 893         assert( SLAP_SOCK_IS_ACTIVE( s ));
 894
 895         if ( wasactive ) slap_daemon.sd_nactives--;
 896
 897         waswriter = SLAP_SOCK_IS_WRITE(s);
 898         wasreader = SLAP_SOCK_IS_READ(s);
 899
 900         Debug( LDAP_DEBUG_CONNS, "daemon: removing %ld%s%s\n",
 901                 (long) s,
 902                 wasreader ? "r" : "",
 903                 waswriter ? "w" : "" );
 904
 905         if ( waswriter ) slap_daemon.sd_nwriters--;
 906
 907         SLAP_SOCK_DEL(s);
 908
 909         if ( sb )
 910                 ber_sockbuf_free(sb);
 911
 912         /* If we ran out of file descriptors, we dropped a listener from
 913          * the select() loop. Now that we're removing a session from our
 914          * control, we can try to resume a dropped listener to use.
 915          */
 916         if ( emfile ) {
 917                 int i;
 918                 for ( i = 0; slap_listeners[i] != NULL; i++ ) {
 919                         Listener *lr = slap_listeners[i];
 920
 921                         if ( lr->sl_sd == AC_SOCKET_INVALID ) continue;
 922                         if ( lr->sl_sd == s ) continue;
 923                         if ( lr->sl_mute ) {
 924                                 lr->sl_mute = 0;
 925                                 emfile--;
 926                                 break;
 927                         }
 928                 }
 929                 /* Walked the entire list without enabling anything; emfile
 930                  * counter is stale. Reset it.
 931                  */
 932                 if ( slap_listeners[i] == NULL ) emfile = 0;
 933         }
 934         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 935         WAKE_LISTENER(wake || slapd_gentle_shutdown == 2);
 936 }
 937
 938 void
 939 slapd_clr_write( ber_socket_t s, int wake )
 940 {
 941         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 942
 943         if ( SLAP_SOCK_IS_WRITE( s )) {
 944                 assert( SLAP_SOCK_IS_ACTIVE( s ));
 945
 946                 SLAP_SOCK_CLR_WRITE( s );
 947                 slap_daemon.sd_nwriters--;
 948         }
 949
 950         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 951         WAKE_LISTENER(wake);
 952 }
 953
 954 void
 955 slapd_set_write( ber_socket_t s, int wake )
 956 {
 957         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 958
 959         assert( SLAP_SOCK_IS_ACTIVE( s ));
 960
 961         if ( !SLAP_SOCK_IS_WRITE( s )) {
 962                 SLAP_SOCK_SET_WRITE( s );
 963                 slap_daemon.sd_nwriters++;
 964         }
 965         if (( wake & 2 ) && global_writetimeout && !chk_writetime ) {
 966                 chk_writetime = slap_get_time();
 967         }
 968
 969         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 970         WAKE_LISTENER(wake);
 971 }
 972
 973 int
 974 slapd_clr_read( ber_socket_t s, int wake )
 975 {
 976         int rc = 1;
 977         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 978
 979         if ( SLAP_SOCK_IS_ACTIVE( s )) {
 980                 SLAP_SOCK_CLR_READ( s );
 981                 rc = 0;
 982         }
 983         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 984         if ( !rc )
 985                 WAKE_LISTENER(wake);
 986         return rc;
 987 }
 988
 989 void
 990 slapd_set_read( ber_socket_t s, int wake )
 991 {
 992         int do_wake = 1;
 993         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 994
 995         if( SLAP_SOCK_IS_ACTIVE( s ) && !SLAP_SOCK_IS_READ( s )) {
 996                 SLAP_SOCK_SET_READ( s );
 997         } else {
 998                 do_wake = 0;
 999         }
1000         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1001         if ( do_wake )
1002                 WAKE_LISTENER(wake);
1003 }
1004
1005 time_t
1006 slapd_get_writetime()
1007 {
1008         time_t cur;
1009         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1010         cur = chk_writetime;
1011         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1012         return cur;
1013 }
1014
1015 void
1016 slapd_clr_writetime( time_t old )
1017 {
1018         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1019         if ( chk_writetime == old )
1020                 chk_writetime = 0;
1021         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1022 }
1023
1024 static void
1025 slapd_close( ber_socket_t s )
1026 {
1027         Debug( LDAP_DEBUG_CONNS, "daemon: closing %ld\n",
1028                 (long) s, 0, 0 );
1029         tcp_close( SLAP_FD2SOCK(s) );
1030 #ifdef HAVE_WINSOCK
1031         slapd_sockdel( s );
1032 #endif
1033 }
1034
1035 static void
1036 slap_free_listener_addresses( struct sockaddr **sal )
1037 {
1038         struct sockaddr **sap;
1039         if (sal == NULL) return;
1040         for (sap = sal; *sap != NULL; sap++) ch_free(*sap);
1041         ch_free(sal);
1042 }
1043
1044 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
1045 static int
1046 get_url_perms(
1047         char    **exts,
1048         mode_t  *perms,
1049         int     *crit )
1050 {
1051         int     i;
1052
1053         assert( exts != NULL );
1054         assert( perms != NULL );
1055         assert( crit != NULL );
1056
1057         *crit = 0;
1058         for ( i = 0; exts[ i ]; i++ ) {
1059                 char    *type = exts[ i ];
1060                 int     c = 0;
1061
1062                 if ( type[ 0 ] == '!' ) {
1063                         c = 1;
1064                         type++;
1065                 }
1066
1067                 if ( strncasecmp( type, LDAPI_MOD_URLEXT "=",
1068                         sizeof(LDAPI_MOD_URLEXT "=") - 1 ) == 0 )
1069                 {
1070                         char *value = type + ( sizeof(LDAPI_MOD_URLEXT "=") - 1 );
1071                         mode_t p = 0;
1072                         int j;
1073
1074                         switch (strlen(value)) {
1075                         case 4:
1076                                 /* skip leading '0' */
1077                                 if ( value[ 0 ] != '0' ) return LDAP_OTHER;
1078                                 value++;
1079
1080                         case 3:
1081                                 for ( j = 0; j < 3; j++) {
1082                                         int     v;
1083
1084                                         v = value[ j ] - '0';
1085
1086                                         if ( v < 0 || v > 7 ) return LDAP_OTHER;
1087
1088                                         p |= v << 3*(2-j);
1089                                 }
1090                                 break;
1091
1092                         case 10:
1093                                 for ( j = 1; j < 10; j++ ) {
1094                                         static mode_t   m[] = { 0,
1095                                                 S_IRUSR, S_IWUSR, S_IXUSR,
1096                                                 S_IRGRP, S_IWGRP, S_IXGRP,
1097                                                 S_IROTH, S_IWOTH, S_IXOTH
1098                                         };
1099                                         static const char       c[] = "-rwxrwxrwx";
1100
1101                                         if ( value[ j ] == c[ j ] ) {
1102                                                 p |= m[ j ];
1103
1104                                         } else if ( value[ j ] != '-' ) {
1105                                                 return LDAP_OTHER;
1106                                         }
1107                                 }
1108                                 break;
1109
1110                         default:
1111                                 return LDAP_OTHER;
1112                         }
1113
1114                         *crit = c;
1115                         *perms = p;
1116
1117                         return LDAP_SUCCESS;
1118                 }
1119         }
1120
1121         return LDAP_OTHER;
1122 }
1123 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
1124
1125 /* port = 0 indicates AF_LOCAL */
1126 static int
1127 slap_get_listener_addresses(
1128         const char *host,
1129         unsigned short port,
1130         struct sockaddr ***sal )
1131 {
1132         struct sockaddr **sap;
1133
1134 #ifdef LDAP_PF_LOCAL
1135         if ( port == 0 ) {
1136                 *sal = ch_malloc(2 * sizeof(void *));
1137                 if (*sal == NULL) return -1;
1138
1139                 sap = *sal;
1140                 *sap = ch_malloc(sizeof(struct sockaddr_un));
1141                 if (*sap == NULL) goto errexit;
1142                 sap[1] = NULL;
1143
1144                 if ( strlen(host) >
1145                         (sizeof(((struct sockaddr_un *)*sap)->sun_path) - 1) )
1146                 {
1147                         Debug( LDAP_DEBUG_ANY,
1148                                 "daemon: domain socket path (%s) too long in URL",
1149                                 host, 0, 0);
1150                         goto errexit;
1151                 }
1152
1153                 (void)memset( (void *)*sap, '\0', sizeof(struct sockaddr_un) );
1154                 (*sap)->sa_family = AF_LOCAL;
1155                 strcpy( ((struct sockaddr_un *)*sap)->sun_path, host );
1156         } else
1157 #endif /* LDAP_PF_LOCAL */
1158         {
1159 #ifdef HAVE_GETADDRINFO
1160                 struct addrinfo hints, *res, *sai;
1161                 int n, err;
1162                 char serv[7];
1163
1164                 memset( &hints, '\0', sizeof(hints) );
1165                 hints.ai_flags = AI_PASSIVE;
1166                 hints.ai_socktype = SOCK_STREAM;
1167                 hints.ai_family = slap_inet4or6;
1168                 snprintf(serv, sizeof serv, "%d", port);
1169
1170                 if ( (err = getaddrinfo(host, serv, &hints, &res)) ) {
1171                         Debug( LDAP_DEBUG_ANY, "daemon: getaddrinfo() failed: %s\n",
1172                                 AC_GAI_STRERROR(err), 0, 0);
1173                         return -1;
1174                 }
1175
1176                 sai = res;
1177                 for (n=2; (sai = sai->ai_next) != NULL; n++) {
1178                         /* EMPTY */ ;
1179                 }
1180                 *sal = ch_calloc(n, sizeof(void *));
1181                 if (*sal == NULL) return -1;
1182
1183                 sap = *sal;
1184                 *sap = NULL;
1185
1186                 for ( sai=res; sai; sai=sai->ai_next ) {
1187                         if( sai->ai_addr == NULL ) {
1188                                 Debug( LDAP_DEBUG_ANY, "slap_get_listener_addresses: "
1189                                         "getaddrinfo ai_addr is NULL?\n", 0, 0, 0 );
1190                                 freeaddrinfo(res);
1191                                 goto errexit;
1192                         }
1193
1194                         switch (sai->ai_family) {
1195 #  ifdef LDAP_PF_INET6
1196                         case AF_INET6:
1197                                 *sap = ch_malloc(sizeof(struct sockaddr_in6));
1198                                 if (*sap == NULL) {
1199                                         freeaddrinfo(res);
1200                                         goto errexit;
1201                                 }
1202                                 *(struct sockaddr_in6 *)*sap =
1203                                         *((struct sockaddr_in6 *)sai->ai_addr);
1204                                 break;
1205 #  endif /* LDAP_PF_INET6 */
1206                         case AF_INET:
1207                                 *sap = ch_malloc(sizeof(struct sockaddr_in));
1208                                 if (*sap == NULL) {
1209                                         freeaddrinfo(res);
1210                                         goto errexit;
1211                                 }
1212                                 *(struct sockaddr_in *)*sap =
1213                                         *((struct sockaddr_in *)sai->ai_addr);
1214                                 break;
1215                         default:
1216                                 *sap = NULL;
1217                                 break;
1218                         }
1219
1220                         if (*sap != NULL) {
1221                                 (*sap)->sa_family = sai->ai_family;
1222                                 sap++;
1223                                 *sap = NULL;
1224                         }
1225                 }
1226
1227                 freeaddrinfo(res);
1228
1229 #else /* ! HAVE_GETADDRINFO */
1230                 int i, n = 1;
1231                 struct in_addr in;
1232                 struct hostent *he = NULL;
1233
1234                 if ( host == NULL ) {
1235                         in.s_addr = htonl(INADDR_ANY);
1236
1237                 } else if ( !inet_aton( host, &in ) ) {
1238                         he = gethostbyname( host );
1239                         if( he == NULL ) {
1240                                 Debug( LDAP_DEBUG_ANY,
1241                                         "daemon: invalid host %s", host, 0, 0);
1242                                 return -1;
1243                         }
1244                         for (n = 0; he->h_addr_list[n]; n++) /* empty */;
1245                 }
1246
1247                 *sal = ch_malloc((n+1) * sizeof(void *));
1248                 if (*sal == NULL) return -1;
1249
1250                 sap = *sal;
1251                 for ( i = 0; i<n; i++ ) {
1252                         sap[i] = ch_malloc(sizeof(struct sockaddr_in));
1253                         if (*sap == NULL) goto errexit;
1254
1255                         (void)memset( (void *)sap[i], '\0', sizeof(struct sockaddr_in) );
1256                         sap[i]->sa_family = AF_INET;
1257                         ((struct sockaddr_in *)sap[i])->sin_port = htons(port);
1258                         AC_MEMCPY( &((struct sockaddr_in *)sap[i])->sin_addr,
1259                                 he ? (struct in_addr *)he->h_addr_list[i] : &in,
1260                                 sizeof(struct in_addr) );
1261                 }
1262                 sap[i] = NULL;
1263 #endif /* ! HAVE_GETADDRINFO */
1264         }
1265
1266         return 0;
1267
1268 errexit:
1269         slap_free_listener_addresses(*sal);
1270         return -1;
1271 }
1272
1273 static int
1274 slap_open_listener(
1275         const char* url,
1276         int *listeners,
1277         int *cur )
1278 {
1279         int     num, tmp, rc;
1280         Listener l;
1281         Listener *li;
1282         LDAPURLDesc *lud;
1283         unsigned short port;
1284         int err, addrlen = 0;
1285         struct sockaddr **sal, **psal;
1286         int socktype = SOCK_STREAM;     /* default to COTS */
1287         ber_socket_t s;
1288
1289 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
1290         /*
1291          * use safe defaults
1292          */
1293         int     crit = 1;
1294 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
1295
1296         rc = ldap_url_parse( url, &lud );
1297
1298         if( rc != LDAP_URL_SUCCESS ) {
1299                 Debug( LDAP_DEBUG_ANY,
1300                         "daemon: listen URL \"%s\" parse error=%d\n",
1301                         url, rc, 0 );
1302                 return rc;
1303         }
1304
1305         l.sl_url.bv_val = NULL;
1306         l.sl_mute = 0;
1307         l.sl_busy = 0;
1308
1309 #ifndef HAVE_TLS
1310         if( ldap_pvt_url_scheme2tls( lud->lud_scheme ) ) {
1311                 Debug( LDAP_DEBUG_ANY, "daemon: TLS not supported (%s)\n",
1312                         url, 0, 0 );
1313                 ldap_free_urldesc( lud );
1314                 return -1;
1315         }
1316
1317         if(! lud->lud_port ) lud->lud_port = LDAP_PORT;
1318
1319 #else /* HAVE_TLS */
1320         l.sl_is_tls = ldap_pvt_url_scheme2tls( lud->lud_scheme );
1321
1322         if(! lud->lud_port ) {
1323                 lud->lud_port = l.sl_is_tls ? LDAPS_PORT : LDAP_PORT;
1324         }
1325 #endif /* HAVE_TLS */
1326
1327 #ifdef LDAP_TCP_BUFFER
1328         l.sl_tcp_rmem = 0;
1329         l.sl_tcp_wmem = 0;
1330 #endif /* LDAP_TCP_BUFFER */
1331
1332         port = (unsigned short) lud->lud_port;
1333
1334         tmp = ldap_pvt_url_scheme2proto(lud->lud_scheme);
1335         if ( tmp == LDAP_PROTO_IPC ) {
1336 #ifdef LDAP_PF_LOCAL
1337                 if ( lud->lud_host == NULL || lud->lud_host[0] == '\0' ) {
1338                         err = slap_get_listener_addresses(LDAPI_SOCK, 0, &sal);
1339                 } else {
1340                         err = slap_get_listener_addresses(lud->lud_host, 0, &sal);
1341                 }
1342 #else /* ! LDAP_PF_LOCAL */
1343
1344                 Debug( LDAP_DEBUG_ANY, "daemon: URL scheme not supported: %s",
1345                         url, 0, 0);
1346                 ldap_free_urldesc( lud );
1347                 return -1;
1348 #endif /* ! LDAP_PF_LOCAL */
1349         } else {
1350                 if( lud->lud_host == NULL || lud->lud_host[0] == '\0'
1351                         || strcmp(lud->lud_host, "*") == 0 )
1352                 {
1353                         err = slap_get_listener_addresses(NULL, port, &sal);
1354                 } else {
1355                         err = slap_get_listener_addresses(lud->lud_host, port, &sal);
1356                 }
1357         }
1358
1359 #ifdef LDAP_CONNECTIONLESS
1360         l.sl_is_udp = ( tmp == LDAP_PROTO_UDP );
1361 #endif /* LDAP_CONNECTIONLESS */
1362
1363 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
1364         if ( lud->lud_exts ) {
1365                 err = get_url_perms( lud->lud_exts, &l.sl_perms, &crit );
1366         } else {
1367                 l.sl_perms = S_IRWXU | S_IRWXO;
1368         }
1369 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
1370
1371         ldap_free_urldesc( lud );
1372         if ( err ) return -1;
1373
1374         /* If we got more than one address returned, we need to make space
1375          * for it in the slap_listeners array.
1376          */
1377         for ( num=0; sal[num]; num++ ) /* empty */;
1378         if ( num > 1 ) {
1379                 *listeners += num-1;
1380                 slap_listeners = ch_realloc( slap_listeners,
1381                         (*listeners + 1) * sizeof(Listener *) );
1382         }
1383
1384         psal = sal;
1385         while ( *sal != NULL ) {
1386                 char *af;
1387                 switch( (*sal)->sa_family ) {
1388                 case AF_INET:
1389                         af = "IPv4";
1390                         break;
1391 #ifdef LDAP_PF_INET6
1392                 case AF_INET6:
1393                         af = "IPv6";
1394                         break;
1395 #endif /* LDAP_PF_INET6 */
1396 #ifdef LDAP_PF_LOCAL
1397                 case AF_LOCAL:
1398                         af = "Local";
1399                         break;
1400 #endif /* LDAP_PF_LOCAL */
1401                 default:
1402                         sal++;
1403                         continue;
1404                 }
1405
1406 #ifdef LDAP_CONNECTIONLESS
1407                 if( l.sl_is_udp ) socktype = SOCK_DGRAM;
1408 #endif /* LDAP_CONNECTIONLESS */
1409
1410                 s = socket( (*sal)->sa_family, socktype, 0);
1411                 if ( s == AC_SOCKET_INVALID ) {
1412                         int err = sock_errno();
1413                         Debug( LDAP_DEBUG_ANY,
1414                                 "daemon: %s socket() failed errno=%d (%s)\n",
1415                                 af, err, sock_errstr(err) );
1416                         sal++;
1417                         continue;
1418                 }
1419                 l.sl_sd = SLAP_SOCKNEW( s );
1420
1421                 if ( l.sl_sd >= dtblsize ) {
1422                         Debug( LDAP_DEBUG_ANY,
1423                                 "daemon: listener descriptor %ld is too great %ld\n",
1424                                 (long) l.sl_sd, (long) dtblsize, 0 );
1425                         tcp_close( s );
1426                         sal++;
1427                         continue;
1428                 }
1429
1430 #ifdef LDAP_PF_LOCAL
1431                 if ( (*sal)->sa_family == AF_LOCAL ) {
1432                         unlink( ((struct sockaddr_un *)*sal)->sun_path );
1433                 } else
1434 #endif /* LDAP_PF_LOCAL */
1435                 {
1436 #ifdef SO_REUSEADDR
1437                         /* enable address reuse */
1438                         tmp = 1;
1439                         rc = setsockopt( s, SOL_SOCKET, SO_REUSEADDR,
1440                                 (char *) &tmp, sizeof(tmp) );
1441                         if ( rc == AC_SOCKET_ERROR ) {
1442                                 int err = sock_errno();
1443                                 Debug( LDAP_DEBUG_ANY, "slapd(%ld): "
1444                                         "setsockopt(SO_REUSEADDR) failed errno=%d (%s)\n",
1445                                         (long) l.sl_sd, err, sock_errstr(err) );
1446                         }
1447 #endif /* SO_REUSEADDR */
1448                 }
1449
1450                 switch( (*sal)->sa_family ) {
1451                 case AF_INET:
1452                         addrlen = sizeof(struct sockaddr_in);
1453                         break;
1454 #ifdef LDAP_PF_INET6
1455                 case AF_INET6:
1456 #ifdef IPV6_V6ONLY
1457                         /* Try to use IPv6 sockets for IPv6 only */
1458                         tmp = 1;
1459                         rc = setsockopt( s , IPPROTO_IPV6, IPV6_V6ONLY,
1460                                 (char *) &tmp, sizeof(tmp) );
1461                         if ( rc == AC_SOCKET_ERROR ) {
1462                                 int err = sock_errno();
1463                                 Debug( LDAP_DEBUG_ANY, "slapd(%ld): "
1464                                         "setsockopt(IPV6_V6ONLY) failed errno=%d (%s)\n",
1465                                         (long) l.sl_sd, err, sock_errstr(err) );
1466                         }
1467 #endif /* IPV6_V6ONLY */
1468                         addrlen = sizeof(struct sockaddr_in6);
1469                         break;
1470 #endif /* LDAP_PF_INET6 */
1471
1472 #ifdef LDAP_PF_LOCAL
1473                 case AF_LOCAL:
1474 #ifdef LOCAL_CREDS
1475                         {
1476                                 int one = 1;
1477                                 setsockopt( s, 0, LOCAL_CREDS, &one, sizeof( one ) );
1478                         }
1479 #endif /* LOCAL_CREDS */
1480
1481                         addrlen = sizeof( struct sockaddr_un );
1482                         break;
1483 #endif /* LDAP_PF_LOCAL */
1484                 }
1485
1486 #ifdef LDAP_PF_LOCAL
1487                 /* create socket with all permissions set for those systems
1488                  * that honor permissions on sockets (e.g. Linux); typically,
1489                  * only write is required.  To exploit filesystem permissions,
1490                  * place the socket in a directory and use directory's
1491                  * permissions.  Need write perms to the directory to
1492                  * create/unlink the socket; likely need exec perms to access
1493                  * the socket (ITS#4709) */
1494                 {
1495                         mode_t old_umask = 0;
1496
1497                         if ( (*sal)->sa_family == AF_LOCAL ) {
1498                                 old_umask = umask( 0 );
1499                         }
1500 #endif /* LDAP_PF_LOCAL */
1501                         rc = bind( s, *sal, addrlen );
1502 #ifdef LDAP_PF_LOCAL
1503                         if ( old_umask != 0 ) {
1504                                 umask( old_umask );
1505                         }
1506                 }
1507 #endif /* LDAP_PF_LOCAL */
1508                 if ( rc ) {
1509                         err = sock_errno();
1510                         Debug( LDAP_DEBUG_ANY,
1511                                 "daemon: bind(%ld) failed errno=%d (%s)\n",
1512                                 (long)l.sl_sd, err, sock_errstr( err ) );
1513                         tcp_close( s );
1514                         sal++;
1515                         continue;
1516                 }
1517
1518                 switch ( (*sal)->sa_family ) {
1519 #ifdef LDAP_PF_LOCAL
1520                 case AF_LOCAL: {
1521                         char *addr = ((struct sockaddr_un *)*sal)->sun_path;
1522                         l.sl_name.bv_len = strlen(addr) + sizeof("PATH=") - 1;
1523                         l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len + 1 );
1524                         snprintf( l.sl_name.bv_val, l.sl_name.bv_len + 1,
1525                                 "PATH=%s", addr );
1526                 } break;
1527 #endif /* LDAP_PF_LOCAL */
1528
1529                 case AF_INET: {
1530                         char *s;
1531 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
1532                         char addr[INET_ADDRSTRLEN];
1533                         inet_ntop( AF_INET, &((struct sockaddr_in *)*sal)->sin_addr,
1534                                 addr, sizeof(addr) );
1535                         s = addr;
1536 #else /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1537                         s = inet_ntoa( ((struct sockaddr_in *) *sal)->sin_addr );
1538 #endif /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1539                         port = ntohs( ((struct sockaddr_in *)*sal) ->sin_port );
1540                         l.sl_name.bv_val =
1541                                 ber_memalloc( sizeof("IP=255.255.255.255:65535") );
1542                         snprintf( l.sl_name.bv_val, sizeof("IP=255.255.255.255:65535"),
1543                                 "IP=%s:%d",
1544                                  s != NULL ? s : SLAP_STRING_UNKNOWN, port );
1545                         l.sl_name.bv_len = strlen( l.sl_name.bv_val );
1546                 } break;
1547
1548 #ifdef LDAP_PF_INET6
1549                 case AF_INET6: {
1550                         char addr[INET6_ADDRSTRLEN];
1551                         inet_ntop( AF_INET6, &((struct sockaddr_in6 *)*sal)->sin6_addr,
1552                                 addr, sizeof addr);
1553                         port = ntohs( ((struct sockaddr_in6 *)*sal)->sin6_port );
1554                         l.sl_name.bv_len = strlen(addr) + sizeof("IP=[]:65535");
1555                         l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len );
1556                         snprintf( l.sl_name.bv_val, l.sl_name.bv_len, "IP=[%s]:%d",
1557                                 addr, port );
1558                         l.sl_name.bv_len = strlen( l.sl_name.bv_val );
1559                 } break;
1560 #endif /* LDAP_PF_INET6 */
1561
1562                 default:
1563                         Debug( LDAP_DEBUG_ANY, "daemon: unsupported address family (%d)\n",
1564                                 (int) (*sal)->sa_family, 0, 0 );
1565                         break;
1566                 }
1567
1568                 AC_MEMCPY(&l.sl_sa, *sal, addrlen);
1569                 ber_str2bv( url, 0, 1, &l.sl_url);
1570                 li = ch_malloc( sizeof( Listener ) );
1571                 *li = l;
1572                 slap_listeners[*cur] = li;
1573                 (*cur)++;
1574                 sal++;
1575         }
1576
1577         slap_free_listener_addresses(psal);
1578
1579         if ( l.sl_url.bv_val == NULL ) {
1580                 Debug( LDAP_DEBUG_TRACE,
1581                         "slap_open_listener: failed on %s\n", url, 0, 0 );
1582                 return -1;
1583         }
1584
1585         Debug( LDAP_DEBUG_TRACE, "daemon: listener initialized %s\n",
1586                 l.sl_url.bv_val, 0, 0 );
1587         return 0;
1588 }
1589
1590 static int sockinit(void);
1591 static int sockdestroy(void);
1592
1593 int
1594 slapd_daemon_init( const char *urls )
1595 {
1596         int i, j, n, rc;
1597         char **u;
1598
1599         Debug( LDAP_DEBUG_ARGS, "daemon_init: %s\n",
1600                 urls ? urls : "<null>", 0, 0 );
1601
1602         ldap_pvt_thread_mutex_init( &slap_daemon.sd_mutex );
1603 #ifdef HAVE_TCPD
1604         ldap_pvt_thread_mutex_init( &slap_daemon.sd_tcpd_mutex );
1605 #endif /* TCP Wrappers */
1606
1607         if( (rc = sockinit()) != 0 ) return rc;
1608
1609 #ifdef HAVE_SYSCONF
1610         dtblsize = sysconf( _SC_OPEN_MAX );
1611 #elif defined(HAVE_GETDTABLESIZE)
1612         dtblsize = getdtablesize();
1613 #else /* ! HAVE_SYSCONF && ! HAVE_GETDTABLESIZE */
1614         dtblsize = FD_SETSIZE;
1615 #endif /* ! HAVE_SYSCONF && ! HAVE_GETDTABLESIZE */
1616
1617         /* open a pipe (or something equivalent connected to itself).
1618          * we write a byte on this fd whenever we catch a signal. The main
1619          * loop will be select'ing on this socket, and will wake up when
1620          * this byte arrives.
1621          */
1622         if( (rc = lutil_pair( wake_sds )) < 0 ) {
1623                 Debug( LDAP_DEBUG_ANY,
1624                         "daemon: lutil_pair() failed rc=%d\n", rc, 0, 0 );
1625                 return rc;
1626         }
1627         ber_pvt_socket_set_nonblock( wake_sds[1], 1 );
1628
1629         SLAP_SOCK_INIT;
1630
1631         if( urls == NULL ) urls = "ldap:///";
1632
1633         u = ldap_str2charray( urls, " " );
1634
1635         if( u == NULL || u[0] == NULL ) {
1636                 Debug( LDAP_DEBUG_ANY, "daemon_init: no urls (%s) provided.\n",
1637                         urls, 0, 0 );
1638                 if ( u )
1639                         ldap_charray_free( u );
1640                 return -1;
1641         }
1642
1643         for( i=0; u[i] != NULL; i++ ) {
1644                 Debug( LDAP_DEBUG_TRACE, "daemon_init: listen on %s\n",
1645                         u[i], 0, 0 );
1646         }
1647
1648         if( i == 0 ) {
1649                 Debug( LDAP_DEBUG_ANY, "daemon_init: no listeners to open (%s)\n",
1650                         urls, 0, 0 );
1651                 ldap_charray_free( u );
1652                 return -1;
1653         }
1654
1655         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners to open...\n",
1656                 i, 0, 0 );
1657         slap_listeners = ch_malloc( (i+1)*sizeof(Listener *) );
1658
1659         for(n = 0, j = 0; u[n]; n++ ) {
1660                 if ( slap_open_listener( u[n], &i, &j ) ) {
1661                         ldap_charray_free( u );
1662                         return -1;
1663                 }
1664         }
1665         slap_listeners[j] = NULL;
1666
1667         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners opened\n",
1668                 i, 0, 0 );
1669
1670
1671 #ifdef HAVE_SLP
1672         if( slapd_register_slp ) {
1673                 slapd_slp_init( urls );
1674                 slapd_slp_reg();
1675         }
1676 #endif /* HAVE_SLP */
1677
1678         ldap_charray_free( u );
1679
1680         return !i;
1681 }
1682
1683
1684 int
1685 slapd_daemon_destroy( void )
1686 {
1687         connections_destroy();
1688 #ifdef HAVE_WINSOCK
1689         if ( wake_sds[1] != INVALID_SOCKET &&
1690                 SLAP_FD2SOCK( wake_sds[1] ) != SLAP_FD2SOCK( wake_sds[0] ))
1691 #endif /* HAVE_WINSOCK */
1692                 tcp_close( SLAP_FD2SOCK(wake_sds[1]) );
1693 #ifdef HAVE_WINSOCK
1694         if ( wake_sds[0] != INVALID_SOCKET )
1695 #endif /* HAVE_WINSOCK */
1696                 tcp_close( SLAP_FD2SOCK(wake_sds[0]) );
1697         sockdestroy();
1698
1699 #ifdef HAVE_SLP
1700         if( slapd_register_slp ) {
1701                 slapd_slp_dereg();
1702                 slapd_slp_deinit();
1703         }
1704 #endif /* HAVE_SLP */
1705
1706 #ifdef HAVE_TCPD
1707         ldap_pvt_thread_mutex_destroy( &slap_daemon.sd_tcpd_mutex );
1708 #endif /* TCP Wrappers */
1709
1710         ldap_pvt_thread_mutex_destroy( &slap_daemon.sd_mutex );
1711         return 0;
1712 }
1713
1714
1715 static void
1716 close_listeners(
1717         int remove )
1718 {
1719         int l;
1720
1721         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1722                 Listener *lr = slap_listeners[l];
1723                 slap_listeners[l] = NULL;
1724
1725                 if ( lr->sl_sd != AC_SOCKET_INVALID ) {
1726                         int s = lr->sl_sd;
1727                         lr->sl_sd = AC_SOCKET_INVALID;
1728                         if ( remove ) slapd_remove( s, NULL, 0, 0, 0 );
1729
1730 #ifdef LDAP_PF_LOCAL
1731                         if ( lr->sl_sa.sa_addr.sa_family == AF_LOCAL ) {
1732                                 unlink( lr->sl_sa.sa_un_addr.sun_path );
1733                         }
1734 #endif /* LDAP_PF_LOCAL */
1735
1736                         slapd_close( s );
1737                 }
1738
1739                 if ( lr->sl_url.bv_val ) {
1740                         ber_memfree( lr->sl_url.bv_val );
1741                 }
1742
1743                 if ( lr->sl_name.bv_val ) {
1744                         ber_memfree( lr->sl_name.bv_val );
1745                 }
1746
1747                 free( lr );
1748         }
1749 }
1750
1751 static int
1752 slap_listener(
1753         Listener *sl )
1754 {
1755         Sockaddr                from;
1756
1757         ber_socket_t s, sfd;
1758         ber_socklen_t len = sizeof(from);
1759         Connection *c;
1760         slap_ssf_t ssf = 0;
1761         struct berval authid = BER_BVNULL;
1762 #ifdef SLAPD_RLOOKUPS
1763         char hbuf[NI_MAXHOST];
1764 #endif /* SLAPD_RLOOKUPS */
1765
1766         char    *dnsname = NULL;
1767         char    *peeraddr = NULL;
1768 #ifdef LDAP_PF_LOCAL
1769         char peername[MAXPATHLEN + sizeof("PATH=")];
1770 #ifdef LDAP_PF_LOCAL_SENDMSG
1771         char peerbuf[8];
1772         struct berval peerbv = BER_BVNULL;
1773 #endif
1774 #elif defined(LDAP_PF_INET6)
1775         char peername[sizeof("IP=[ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff]:65535")];
1776 #else /* ! LDAP_PF_LOCAL && ! LDAP_PF_INET6 */
1777         char peername[sizeof("IP=255.255.255.255:65336")];
1778 #endif /* LDAP_PF_LOCAL */
1779         int cflag;
1780
1781         Debug( LDAP_DEBUG_TRACE,
1782                 ">>> slap_listener(%s)\n",
1783                 sl->sl_url.bv_val, 0, 0 );
1784
1785         peername[0] = '\0';
1786
1787 #ifdef LDAP_CONNECTIONLESS
1788         if ( sl->sl_is_udp ) return 1;
1789 #endif /* LDAP_CONNECTIONLESS */
1790
1791 #  ifdef LDAP_PF_LOCAL
1792         /* FIXME: apparently accept doesn't fill
1793          * the sun_path sun_path member */
1794         from.sa_un_addr.sun_path[0] = '\0';
1795 #  endif /* LDAP_PF_LOCAL */
1796
1797         s = accept( SLAP_FD2SOCK( sl->sl_sd ), (struct sockaddr *) &from, &len );
1798
1799         /* Resume the listener FD to allow concurrent-processing of
1800          * additional incoming connections.
1801          */
1802         sl->sl_busy = 0;
1803         WAKE_LISTENER(1);
1804
1805         if ( s == AC_SOCKET_INVALID ) {
1806                 int err = sock_errno();
1807
1808                 if(
1809 #ifdef EMFILE
1810                     err == EMFILE ||
1811 #endif /* EMFILE */
1812 #ifdef ENFILE
1813                     err == ENFILE ||
1814 #endif /* ENFILE */
1815                     0 )
1816                 {
1817                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1818                         emfile++;
1819                         /* Stop listening until an existing session closes */
1820                         sl->sl_mute = 1;
1821                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1822                 }
1823
1824                 Debug( LDAP_DEBUG_ANY,
1825                         "daemon: accept(%ld) failed errno=%d (%s)\n",
1826                         (long) sl->sl_sd, err, sock_errstr(err) );
1827                 ldap_pvt_thread_yield();
1828                 return 0;
1829         }
1830         sfd = SLAP_SOCKNEW( s );
1831
1832         /* make sure descriptor number isn't too great */
1833         if ( sfd >= dtblsize ) {
1834                 Debug( LDAP_DEBUG_ANY,
1835                         "daemon: %ld beyond descriptor table size %ld\n",
1836                         (long) sfd, (long) dtblsize, 0 );
1837
1838                 tcp_close(s);
1839                 ldap_pvt_thread_yield();
1840                 return 0;
1841         }
1842
1843 #ifdef LDAP_DEBUG
1844         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1845         /* newly accepted stream should not be in any of the FD SETS */
1846         assert( SLAP_SOCK_NOT_ACTIVE( sfd ));
1847         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1848 #endif /* LDAP_DEBUG */
1849
1850 #if defined( SO_KEEPALIVE ) || defined( TCP_NODELAY )
1851 #ifdef LDAP_PF_LOCAL
1852         /* for IPv4 and IPv6 sockets only */
1853         if ( from.sa_addr.sa_family != AF_LOCAL )
1854 #endif /* LDAP_PF_LOCAL */
1855         {
1856                 int rc;
1857                 int tmp;
1858 #ifdef SO_KEEPALIVE
1859                 /* enable keep alives */
1860                 tmp = 1;
1861                 rc = setsockopt( s, SOL_SOCKET, SO_KEEPALIVE,
1862                         (char *) &tmp, sizeof(tmp) );
1863                 if ( rc == AC_SOCKET_ERROR ) {
1864                         int err = sock_errno();
1865                         Debug( LDAP_DEBUG_ANY,
1866                                 "slapd(%ld): setsockopt(SO_KEEPALIVE) failed "
1867                                 "errno=%d (%s)\n", (long) sfd, err, sock_errstr(err) );
1868                 }
1869 #endif /* SO_KEEPALIVE */
1870 #ifdef TCP_NODELAY
1871                 /* enable no delay */
1872                 tmp = 1;
1873                 rc = setsockopt( s, IPPROTO_TCP, TCP_NODELAY,
1874                         (char *)&tmp, sizeof(tmp) );
1875                 if ( rc == AC_SOCKET_ERROR ) {
1876                         int err = sock_errno();
1877                         Debug( LDAP_DEBUG_ANY,
1878                                 "slapd(%ld): setsockopt(TCP_NODELAY) failed "
1879                                 "errno=%d (%s)\n", (long) sfd, err, sock_errstr(err) );
1880                 }
1881 #endif /* TCP_NODELAY */
1882         }
1883 #endif /* SO_KEEPALIVE || TCP_NODELAY */
1884
1885         Debug( LDAP_DEBUG_CONNS,
1886                 "daemon: listen=%ld, new connection on %ld\n",
1887                 (long) sl->sl_sd, (long) sfd, 0 );
1888
1889         cflag = 0;
1890         switch ( from.sa_addr.sa_family ) {
1891 #  ifdef LDAP_PF_LOCAL
1892         case AF_LOCAL:
1893                 cflag |= CONN_IS_IPC;
1894
1895                 /* FIXME: apparently accept doesn't fill
1896                  * the sun_path sun_path member */
1897                 if ( from.sa_un_addr.sun_path[0] == '\0' ) {
1898                         AC_MEMCPY( from.sa_un_addr.sun_path,
1899                                         sl->sl_sa.sa_un_addr.sun_path,
1900                                         sizeof( from.sa_un_addr.sun_path ) );
1901                 }
1902
1903                 sprintf( peername, "PATH=%s", from.sa_un_addr.sun_path );
1904                 ssf = local_ssf;
1905                 {
1906                         uid_t uid;
1907                         gid_t gid;
1908
1909 #ifdef LDAP_PF_LOCAL_SENDMSG
1910                         peerbv.bv_val = peerbuf;
1911                         peerbv.bv_len = sizeof( peerbuf );
1912 #endif
1913                         if( LUTIL_GETPEEREID( s, &uid, &gid, &peerbv ) == 0 ) {
1914                                 authid.bv_val = ch_malloc(
1915                                         STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
1916                                         "cn=peercred,cn=external,cn=auth" ) + 1 );
1917                                 authid.bv_len = sprintf( authid.bv_val,
1918                                         "gidNumber=%d+uidNumber=%d,"
1919                                         "cn=peercred,cn=external,cn=auth",
1920                                         (int) gid, (int) uid );
1921                                 assert( authid.bv_len <=
1922                                         STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
1923                                         "cn=peercred,cn=external,cn=auth" ) );
1924                         }
1925                 }
1926                 dnsname = "local";
1927                 break;
1928 #endif /* LDAP_PF_LOCAL */
1929
1930 #  ifdef LDAP_PF_INET6
1931         case AF_INET6:
1932         if ( IN6_IS_ADDR_V4MAPPED(&from.sa_in6_addr.sin6_addr) ) {
1933                 peeraddr = inet_ntoa( *((struct in_addr *)
1934                                         &from.sa_in6_addr.sin6_addr.s6_addr[12]) );
1935                 sprintf( peername, "IP=%s:%d",
1936                          peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1937                          (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
1938         } else {
1939                 char addr[INET6_ADDRSTRLEN];
1940
1941                 peeraddr = (char *) inet_ntop( AF_INET6,
1942                                       &from.sa_in6_addr.sin6_addr,
1943                                       addr, sizeof addr );
1944                 sprintf( peername, "IP=[%s]:%d",
1945                          peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1946                          (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
1947         }
1948         break;
1949 #  endif /* LDAP_PF_INET6 */
1950
1951         case AF_INET:
1952                 peeraddr = inet_ntoa( from.sa_in_addr.sin_addr );
1953                 sprintf( peername, "IP=%s:%d",
1954                         peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1955                         (unsigned) ntohs( from.sa_in_addr.sin_port ) );
1956                 break;
1957
1958         default:
1959                 slapd_close(sfd);
1960                 return 0;
1961         }
1962
1963         if ( ( from.sa_addr.sa_family == AF_INET )
1964 #ifdef LDAP_PF_INET6
1965                 || ( from.sa_addr.sa_family == AF_INET6 )
1966 #endif /* LDAP_PF_INET6 */
1967                 )
1968         {
1969                 dnsname = NULL;
1970 #ifdef SLAPD_RLOOKUPS
1971                 if ( use_reverse_lookup ) {
1972                         char *herr;
1973                         if (ldap_pvt_get_hname( (const struct sockaddr *)&from, len, hbuf,
1974                                 sizeof(hbuf), &herr ) == 0) {
1975                                 ldap_pvt_str2lower( hbuf );
1976                                 dnsname = hbuf;
1977                         }
1978                 }
1979 #endif /* SLAPD_RLOOKUPS */
1980
1981 #ifdef HAVE_TCPD
1982                 {
1983                         int rc;
1984                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_tcpd_mutex );
1985                         rc = hosts_ctl("slapd",
1986                                 dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1987                                 peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1988                                 SLAP_STRING_UNKNOWN );
1989                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_tcpd_mutex );
1990                         if ( !rc ) {
1991                                 /* DENY ACCESS */
1992                                 Statslog( LDAP_DEBUG_STATS,
1993                                         "fd=%ld DENIED from %s (%s)\n",
1994                                         (long) sfd,
1995                                         dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1996                                         peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1997                                         0, 0 );
1998                                 slapd_close(sfd);
1999                                 return 0;
2000                         }
2001                 }
2002 #endif /* HAVE_TCPD */
2003         }
2004
2005 #ifdef HAVE_TLS
2006         if ( sl->sl_is_tls ) cflag |= CONN_IS_TLS;
2007 #endif
2008         c = connection_init(sfd, sl,
2009                 dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
2010                 peername, cflag, ssf,
2011                 authid.bv_val ? &authid : NULL
2012                 LDAP_PF_LOCAL_SENDMSG_ARG(&peerbv));
2013
2014         if( authid.bv_val ) ch_free(authid.bv_val);
2015
2016         if( !c ) {
2017                 Debug( LDAP_DEBUG_ANY,
2018                         "daemon: connection_init(%ld, %s, %s) failed.\n",
2019                         (long) sfd, peername, sl->sl_name.bv_val );
2020                 slapd_close(sfd);
2021                 return 0;
2022         }
2023
2024         Statslog( LDAP_DEBUG_STATS,
2025                 "conn=%ld fd=%ld ACCEPT from %s (%s)\n",
2026                 c->c_connid, (long) sfd, peername, sl->sl_name.bv_val,
2027                 0 );
2028
2029         return 0;
2030 }
2031
2032 static void*
2033 slap_listener_thread(
2034         void* ctx,
2035         void* ptr )
2036 {
2037         int             rc;
2038         Listener        *sl = (Listener *)ptr;
2039
2040         rc = slap_listener( sl );
2041
2042         if( rc != LDAP_SUCCESS ) {
2043                 Debug( LDAP_DEBUG_ANY,
2044                         "slap_listener_thread(%s): failed err=%d",
2045                         sl->sl_url.bv_val, rc, 0 );
2046         }
2047
2048         return (void*)NULL;
2049 }
2050
2051 static int
2052 slap_listener_activate(
2053         Listener* sl )
2054 {
2055         int rc;
2056
2057         Debug( LDAP_DEBUG_TRACE, "slap_listener_activate(%d): %s\n",
2058                 sl->sl_sd, sl->sl_busy ? "busy" : "", 0 );
2059
2060         sl->sl_busy++;
2061
2062         rc = ldap_pvt_thread_pool_submit( &connection_pool,
2063                 slap_listener_thread, (void *) sl );
2064
2065         if( rc != 0 ) {
2066                 Debug( LDAP_DEBUG_ANY,
2067                         "listener_activate(%d): submit failed (%d)\n",
2068                         sl->sl_sd, rc, 0 );
2069         }
2070         return rc;
2071 }
2072
2073 static void *
2074 slapd_daemon_task(
2075         void *ptr )
2076 {
2077         int l;
2078         time_t last_idle_check = 0;
2079         int ebadf = 0;
2080
2081 #define SLAPD_IDLE_CHECK_LIMIT 4
2082
2083         if ( global_idletimeout > 0 ) {
2084                 last_idle_check = slap_get_time();
2085         }
2086
2087         slapd_add( wake_sds[0], 0, NULL );
2088
2089         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2090                 if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) continue;
2091
2092 #ifdef LDAP_CONNECTIONLESS
2093                 /* Since this is connectionless, the data port is the
2094                  * listening port. The listen() and accept() calls
2095                  * are unnecessary.
2096                  */
2097                 if ( slap_listeners[l]->sl_is_udp )
2098                         continue;
2099 #endif /* LDAP_CONNECTIONLESS */
2100
2101                 /* FIXME: TCP-only! */
2102 #ifdef LDAP_TCP_BUFFER
2103                 if ( 1 ) {
2104                         int origsize, size, realsize, rc;
2105                         socklen_t optlen;
2106                         char buf[ SLAP_TEXT_BUFLEN ];
2107
2108                         size = 0;
2109                         if ( slap_listeners[l]->sl_tcp_rmem > 0 ) {
2110                                 size = slap_listeners[l]->sl_tcp_rmem;
2111                         } else if ( slapd_tcp_rmem > 0 ) {
2112                                 size = slapd_tcp_rmem;
2113                         }
2114
2115                         if ( size > 0 ) {
2116                                 optlen = sizeof( origsize );
2117                                 rc = getsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
2118                                         SOL_SOCKET,
2119                                         SO_RCVBUF,
2120                                         (void *)&origsize,
2121                                         &optlen );
2122
2123                                 if ( rc ) {
2124                                         int err = sock_errno();
2125                                         Debug( LDAP_DEBUG_ANY,
2126                                                 "slapd_daemon_task: getsockopt(SO_RCVBUF) failed errno=%d (%s)\n",
2127                                                 err, sock_errstr(err), 0 );
2128                                 }
2129
2130                                 optlen = sizeof( size );
2131                                 rc = setsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
2132                                         SOL_SOCKET,
2133                                         SO_RCVBUF,
2134                                         (const void *)&size,
2135                                         optlen );
2136
2137                                 if ( rc ) {
2138                                         int err = sock_errno();
2139                                         Debug( LDAP_DEBUG_ANY,
2140                                                 "slapd_daemon_task: setsockopt(SO_RCVBUF) failed errno=%d (%s)\n",
2141                                                 err, sock_errstr(err), 0 );
2142                                 }
2143
2144                                 optlen = sizeof( realsize );
2145                                 rc = getsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
2146                                         SOL_SOCKET,
2147                                         SO_RCVBUF,
2148                                         (void *)&realsize,
2149                                         &optlen );
2150
2151                                 if ( rc ) {
2152                                         int err = sock_errno();
2153                                         Debug( LDAP_DEBUG_ANY,
2154                                                 "slapd_daemon_task: getsockopt(SO_RCVBUF) failed errno=%d (%s)\n",
2155                                                 err, sock_errstr(err), 0 );
2156                                 }
2157
2158                                 snprintf( buf, sizeof( buf ),
2159                                         "url=%s (#%d) RCVBUF original size=%d requested size=%d real size=%d",
2160                                         slap_listeners[l]->sl_url.bv_val, l, origsize, size, realsize );
2161                                 Debug( LDAP_DEBUG_ANY,
2162                                         "slapd_daemon_task: %s\n",
2163                                         buf, 0, 0 );
2164                         }
2165
2166                         size = 0;
2167                         if ( slap_listeners[l]->sl_tcp_wmem > 0 ) {
2168                                 size = slap_listeners[l]->sl_tcp_wmem;
2169                         } else if ( slapd_tcp_wmem > 0 ) {
2170                                 size = slapd_tcp_wmem;
2171                         }
2172
2173                         if ( size > 0 ) {
2174                                 optlen = sizeof( origsize );
2175                                 rc = getsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
2176                                         SOL_SOCKET,
2177                                         SO_SNDBUF,
2178                                         (void *)&origsize,
2179                                         &optlen );
2180
2181                                 if ( rc ) {
2182                                         int err = sock_errno();
2183                                         Debug( LDAP_DEBUG_ANY,
2184                                                 "slapd_daemon_task: getsockopt(SO_SNDBUF) failed errno=%d (%s)\n",
2185                                                 err, sock_errstr(err), 0 );
2186                                 }
2187
2188                                 optlen = sizeof( size );
2189                                 rc = setsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
2190                                         SOL_SOCKET,
2191                                         SO_SNDBUF,
2192                                         (const void *)&size,
2193                                         optlen );
2194
2195                                 if ( rc ) {
2196                                         int err = sock_errno();
2197                                         Debug( LDAP_DEBUG_ANY,
2198                                                 "slapd_daemon_task: setsockopt(SO_SNDBUF) failed errno=%d (%s)",
2199                                                 err, sock_errstr(err), 0 );
2200                                 }
2201
2202                                 optlen = sizeof( realsize );
2203                                 rc = getsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
2204                                         SOL_SOCKET,
2205                                         SO_SNDBUF,
2206                                         (void *)&realsize,
2207                                         &optlen );
2208
2209                                 if ( rc ) {
2210                                         int err = sock_errno();
2211                                         Debug( LDAP_DEBUG_ANY,
2212                                                 "slapd_daemon_task: getsockopt(SO_SNDBUF) failed errno=%d (%s)\n",
2213                                                 err, sock_errstr(err), 0 );
2214                                 }
2215
2216                                 snprintf( buf, sizeof( buf ),
2217                                         "url=%s (#%d) SNDBUF original size=%d requested size=%d real size=%d",
2218                                         slap_listeners[l]->sl_url.bv_val, l, origsize, size, realsize );
2219                                 Debug( LDAP_DEBUG_ANY,
2220                                         "slapd_daemon_task: %s\n",
2221                                         buf, 0, 0 );
2222                         }
2223                 }
2224 #endif /* LDAP_TCP_BUFFER */
2225
2226                 if ( listen( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ), SLAPD_LISTEN_BACKLOG ) == -1 ) {
2227                         int err = sock_errno();
2228
2229 #ifdef LDAP_PF_INET6
2230                         /* If error is EADDRINUSE, we are trying to listen to INADDR_ANY and
2231                          * we are already listening to in6addr_any, then we want to ignore
2232                          * this and continue.
2233                          */
2234                         if ( err == EADDRINUSE ) {
2235                                 int i;
2236                                 struct sockaddr_in sa = slap_listeners[l]->sl_sa.sa_in_addr;
2237                                 struct sockaddr_in6 sa6;
2238
2239                                 if ( sa.sin_family == AF_INET &&
2240                                      sa.sin_addr.s_addr == htonl(INADDR_ANY) ) {
2241                                         for ( i = 0 ; i < l; i++ ) {
2242                                                 sa6 = slap_listeners[i]->sl_sa.sa_in6_addr;
2243                                                 if ( sa6.sin6_family == AF_INET6 &&
2244                                                      !memcmp( &sa6.sin6_addr, &in6addr_any,
2245                                                                 sizeof(struct in6_addr) ) )
2246                                                 {
2247                                                         break;
2248                                                 }
2249                                         }
2250
2251                                         if ( i < l ) {
2252                                                 /* We are already listening to in6addr_any */
2253                                                 Debug( LDAP_DEBUG_CONNS,
2254                                                         "daemon: Attempt to listen to 0.0.0.0 failed, "
2255                                                         "already listening on ::, assuming IPv4 included\n",
2256                                                         0, 0, 0 );
2257                                                 slapd_close( slap_listeners[l]->sl_sd );
2258                                                 slap_listeners[l]->sl_sd = AC_SOCKET_INVALID;
2259                                                 continue;
2260                                         }
2261                                 }
2262                         }
2263 #endif /* LDAP_PF_INET6 */
2264                         Debug( LDAP_DEBUG_ANY,
2265                                 "daemon: listen(%s, 5) failed errno=%d (%s)\n",
2266                                         slap_listeners[l]->sl_url.bv_val, err,
2267                                         sock_errstr(err) );
2268                         return (void*)-1;
2269                 }
2270
2271                 /* make the listening socket non-blocking */
2272                 if ( ber_pvt_socket_set_nonblock( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ), 1 ) < 0 ) {
2273                         Debug( LDAP_DEBUG_ANY, "slapd_daemon_task: "
2274                                 "set nonblocking on a listening socket failed\n",
2275                                 0, 0, 0 );
2276                         slapd_shutdown = 2;
2277                         return (void*)-1;
2278                 }
2279
2280                 slapd_add( slap_listeners[l]->sl_sd, 0, slap_listeners[l] );
2281         }
2282
2283 #ifdef HAVE_NT_SERVICE_MANAGER
2284         if ( started_event != NULL ) {
2285                 ldap_pvt_thread_cond_signal( &started_event );
2286         }
2287 #endif /* HAVE_NT_SERVICE_MANAGER */
2288
2289         /* initialization complete. Here comes the loop. */
2290
2291         while ( !slapd_shutdown ) {
2292                 ber_socket_t            i;
2293                 int                     ns, nwriters;
2294                 int                     at;
2295                 ber_socket_t            nfds;
2296 #if SLAP_EVENTS_ARE_INDEXED
2297                 ber_socket_t            nrfds, nwfds;
2298 #endif /* SLAP_EVENTS_ARE_INDEXED */
2299 #define SLAPD_EBADF_LIMIT 16
2300
2301                 time_t                  now;
2302
2303                 SLAP_EVENT_DECL;
2304
2305                 struct timeval          tv;
2306                 struct timeval          *tvp;
2307
2308                 struct timeval          cat;
2309                 time_t                  tdelta = 1;
2310                 struct re_s*            rtask;
2311
2312                 now = slap_get_time();
2313
2314                 if ( global_idletimeout > 0 || chk_writetime ) {
2315                         int check = 0;
2316                         /* Set the select timeout.
2317                          * Don't just truncate, preserve the fractions of
2318                          * seconds to prevent sleeping for zero time.
2319                          */
2320                         if ( chk_writetime ) {
2321                                 tv.tv_sec = global_writetimeout;
2322                                 tv.tv_usec = 0;
2323                                 if ( difftime( chk_writetime, now ) < 0 )
2324                                         check = 2;
2325                         } else {
2326                                 tv.tv_sec = global_idletimeout / SLAPD_IDLE_CHECK_LIMIT;
2327                                 tv.tv_usec = global_idletimeout - \
2328                                         ( tv.tv_sec * SLAPD_IDLE_CHECK_LIMIT );
2329                                 tv.tv_usec *= 1000000 / SLAPD_IDLE_CHECK_LIMIT;
2330                                 if ( difftime( last_idle_check +
2331                                         global_idletimeout/SLAPD_IDLE_CHECK_LIMIT, now ) < 0 )
2332                                         check = 1;
2333                         }
2334                         if ( check ) {
2335                                 connections_timeout_idle( now );
2336                                 last_idle_check = now;
2337                         }
2338                 } else {
2339                         tv.tv_sec = 0;
2340                         tv.tv_usec = 0;
2341                 }
2342
2343 #ifdef SIGHUP
2344                 if ( slapd_gentle_shutdown ) {
2345                         ber_socket_t active;
2346
2347                         if ( slapd_gentle_shutdown == 1 ) {
2348                                 BackendDB *be;
2349                                 Debug( LDAP_DEBUG_ANY, "slapd gentle shutdown\n", 0, 0, 0 );
2350                                 close_listeners( 1 );
2351                                 frontendDB->be_restrictops |= SLAP_RESTRICT_OP_WRITES;
2352                                 LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
2353                                         be->be_restrictops |= SLAP_RESTRICT_OP_WRITES;
2354                                 }
2355                                 slapd_gentle_shutdown = 2;
2356                         }
2357
2358                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
2359                         active = slap_daemon.sd_nactives;
2360                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
2361                         if ( active == 0 ) {
2362                                 slapd_shutdown = 1;
2363                                 break;
2364                         }
2365                 }
2366 #endif /* SIGHUP */
2367                 at = 0;
2368
2369                 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
2370
2371                 nwriters = slap_daemon.sd_nwriters;
2372
2373                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2374                         Listener *lr = slap_listeners[l];
2375
2376                         if ( lr->sl_sd == AC_SOCKET_INVALID ) continue;
2377
2378                         if ( lr->sl_mute || lr->sl_busy )
2379                         {
2380                                 SLAP_SOCK_CLR_READ( lr->sl_sd );
2381                         } else {
2382                                 SLAP_SOCK_SET_READ( lr->sl_sd );
2383                         }
2384                 }
2385
2386                 SLAP_EVENT_INIT;
2387
2388                 nfds = SLAP_EVENT_MAX;
2389
2390                 if (( chk_writetime || global_idletimeout ) && slap_daemon.sd_nactives ) at = 1;
2391
2392                 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
2393
2394                 if ( at
2395 #if defined(HAVE_YIELDING_SELECT) || defined(NO_THREADS)
2396                         &&  ( tv.tv_sec || tv.tv_usec )
2397 #endif /* HAVE_YIELDING_SELECT || NO_THREADS */
2398                         )
2399                 {
2400                         tvp = &tv;
2401                 } else {
2402                         tvp = NULL;
2403                 }
2404
2405                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
2406                 rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
2407                 while ( rtask && cat.tv_sec && cat.tv_sec <= now ) {
2408                         if ( ldap_pvt_runqueue_isrunning( &slapd_rq, rtask )) {
2409                                 ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
2410                         } else {
2411                                 ldap_pvt_runqueue_runtask( &slapd_rq, rtask );
2412                                 ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
2413                                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
2414                                 ldap_pvt_thread_pool_submit( &connection_pool,
2415                                         rtask->routine, (void *) rtask );
2416                                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
2417                         }
2418                         rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
2419                 }
2420                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
2421
2422                 if ( rtask && cat.tv_sec ) {
2423                         /* NOTE: diff __should__ always be >= 0,
2424                          * AFAI understand; however (ITS#4872),
2425                          * time_t might be unsigned in some systems,
2426                          * while difftime() returns a double */
2427                         double diff = difftime( cat.tv_sec, now );
2428                         if ( diff <= 0 ) {
2429                                 diff = tdelta;
2430                         }
2431                         if ( tvp == NULL || diff < tv.tv_sec ) {
2432                                 tv.tv_sec = diff;
2433                                 tv.tv_usec = 0;
2434                                 tvp = &tv;
2435                         }
2436                 }
2437
2438                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2439                         Listener *lr = slap_listeners[l];
2440
2441                         if ( lr->sl_sd == AC_SOCKET_INVALID ) {
2442                                 continue;
2443                         }
2444
2445                         if ( lr->sl_mute ) {
2446                                 Debug( LDAP_DEBUG_CONNS,
2447                                         "daemon: " SLAP_EVENT_FNAME ": "
2448                                         "listen=%d muted\n",
2449                                         lr->sl_sd, 0, 0 );
2450                                 continue;
2451                         }
2452
2453                         if ( lr->sl_busy ) {
2454                                 Debug( LDAP_DEBUG_CONNS,
2455                                         "daemon: " SLAP_EVENT_FNAME ": "
2456                                         "listen=%d busy\n",
2457                                         lr->sl_sd, 0, 0 );
2458                                 continue;
2459                         }
2460
2461                         Debug( LDAP_DEBUG_CONNS,
2462                                 "daemon: " SLAP_EVENT_FNAME ": "
2463                                 "listen=%d active_threads=%d tvp=%s\n",
2464                                 lr->sl_sd, at, tvp == NULL ? "NULL" : "zero" );
2465                 }
2466
2467                 SLAP_EVENT_WAIT( tvp, &ns );
2468                 switch ( ns ) {
2469                 case -1: {      /* failure - try again */
2470                                 int err = sock_errno();
2471
2472                                 if ( err != EINTR ) {
2473                                         ebadf++;
2474
2475                                         /* Don't log unless we got it twice in a row */
2476                                         if ( !( ebadf & 1 ) ) {
2477                                                 Debug( LDAP_DEBUG_ANY,
2478                                                         "daemon: "
2479                                                         SLAP_EVENT_FNAME
2480                                                         " failed count %d "
2481                                                         "err (%d): %s\n",
2482                                                         ebadf, err,
2483                                                         sock_errstr( err ) );
2484                                         }
2485                                         if ( ebadf >= SLAPD_EBADF_LIMIT ) {
2486                                                 slapd_shutdown = 2;
2487                                         }
2488                                 }
2489                         }
2490                         continue;
2491
2492                 case 0:         /* timeout - let threads run */
2493                         ebadf = 0;
2494 #ifndef HAVE_YIELDING_SELECT
2495                         Debug( LDAP_DEBUG_CONNS, "daemon: " SLAP_EVENT_FNAME
2496                                 "timeout - yielding\n",
2497                                 0, 0, 0 );
2498
2499                         ldap_pvt_thread_yield();
2500 #endif /* ! HAVE_YIELDING_SELECT */
2501                         continue;
2502
2503                 default:        /* something happened - deal with it */
2504                         if ( slapd_shutdown ) continue;
2505
2506                         ebadf = 0;
2507                         Debug( LDAP_DEBUG_CONNS,
2508                                 "daemon: activity on %d descriptor%s\n",
2509                                 ns, ns != 1 ? "s" : "", 0 );
2510                         /* FALL THRU */
2511                 }
2512
2513 #if SLAP_EVENTS_ARE_INDEXED
2514                 if ( SLAP_EVENT_IS_READ( wake_sds[0] ) ) {
2515                         char c[BUFSIZ];
2516                         SLAP_EVENT_CLR_READ( wake_sds[0] );
2517                         waking = 0;
2518                         tcp_read( SLAP_FD2SOCK(wake_sds[0]), c, sizeof(c) );
2519                         Debug( LDAP_DEBUG_CONNS, "daemon: waked\n", 0, 0, 0 );
2520                         continue;
2521                 }
2522
2523                 /* The event slot equals the descriptor number - this is
2524                  * true for Unix select and poll. We treat Windows select
2525                  * like this too, even though it's a kludge.
2526                  */
2527                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2528                         int rc;
2529
2530                         if ( ns <= 0 ) break;
2531                         if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) continue;
2532 #ifdef LDAP_CONNECTIONLESS
2533                         if ( slap_listeners[l]->sl_is_udp ) continue;
2534 #endif /* LDAP_CONNECTIONLESS */
2535                         if ( !SLAP_EVENT_IS_READ( slap_listeners[l]->sl_sd ) ) continue;
2536
2537                         /* clear events */
2538                         SLAP_EVENT_CLR_READ( slap_listeners[l]->sl_sd );
2539                         SLAP_EVENT_CLR_WRITE( slap_listeners[l]->sl_sd );
2540                         ns--;
2541
2542                         rc = slap_listener_activate( slap_listeners[l] );
2543                 }
2544
2545                 /* bypass the following tests if no descriptors left */
2546                 if ( ns <= 0 ) {
2547 #ifndef HAVE_YIELDING_SELECT
2548                         ldap_pvt_thread_yield();
2549 #endif /* HAVE_YIELDING_SELECT */
2550                         continue;
2551                 }
2552
2553                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
2554                 nrfds = 0;
2555                 nwfds = 0;
2556                 for ( i = 0; i < nfds; i++ ) {
2557                         int     r, w;
2558
2559                         r = SLAP_EVENT_IS_READ( i );
2560                         /* writefds was not initialized if nwriters was zero */
2561                         w = nwriters ? SLAP_EVENT_IS_WRITE( i ) : 0;
2562                         if ( r || w ) {
2563                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", i,
2564                                     r ? "r" : "", w ? "w" : "" );
2565                                 if ( r ) {
2566                                         nrfds++;
2567                                         ns--;
2568                                 }
2569                                 if ( w ) {
2570                                         nwfds++;
2571                                         ns--;
2572                                 }
2573                         }
2574                         if ( ns <= 0 ) break;
2575                 }
2576                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
2577
2578                 /* loop through the writers */
2579                 for ( i = 0; nwfds > 0; i++ ) {
2580                         ber_socket_t wd;
2581                         if ( ! SLAP_EVENT_IS_WRITE( i ) ) continue;
2582                         wd = i;
2583
2584                         SLAP_EVENT_CLR_WRITE( wd );
2585                         nwfds--;
2586
2587                         Debug( LDAP_DEBUG_CONNS,
2588                                 "daemon: write active on %d\n",
2589                                 wd, 0, 0 );
2590
2591                         /*
2592                          * NOTE: it is possible that the connection was closed
2593                          * and that the stream is now inactive.
2594                          * connection_write() must validate the stream is still
2595                          * active.
2596                          *
2597                          * ITS#4338: if the stream is invalid, there is no need to
2598                          * close it here. It has already been closed in connection.c.
2599                          */
2600                         if ( connection_write( wd ) < 0 ) {
2601                                 if ( SLAP_EVENT_IS_READ( wd ) ) {
2602                                         SLAP_EVENT_CLR_READ( (unsigned) wd );
2603                                         nrfds--;
2604                                 }
2605                         }
2606                 }
2607
2608                 for ( i = 0; nrfds > 0; i++ ) {
2609                         ber_socket_t rd;
2610                         if ( ! SLAP_EVENT_IS_READ( i ) ) continue;
2611                         rd = i;
2612                         SLAP_EVENT_CLR_READ( rd );
2613                         nrfds--;
2614
2615                         Debug ( LDAP_DEBUG_CONNS,
2616                                 "daemon: read activity on %d\n", rd, 0, 0 );
2617                         /*
2618                          * NOTE: it is possible that the connection was closed
2619                          * and that the stream is now inactive.
2620                          * connection_read() must valid the stream is still
2621                          * active.
2622                          */
2623
2624                         connection_read_activate( rd );
2625                 }
2626 #else   /* !SLAP_EVENTS_ARE_INDEXED */
2627         /* FIXME */
2628         /* The events are returned in an arbitrary list. This is true
2629          * for /dev/poll, epoll and kqueue. In order to prioritize things
2630          * so that we can handle wake_sds first, listeners second, and then
2631          * all other connections last (as we do for select), we would need
2632          * to use multiple event handles and cascade them.
2633          *
2634          * That seems like a bit of hassle. So the wake_sds check has been
2635          * skipped. For epoll and kqueue we can associate arbitrary data with
2636          * an event, so we could use pointers to the listener structure
2637          * instead of just the file descriptor. For /dev/poll we have to
2638          * search the listeners array for a matching descriptor.
2639          *
2640          * We now handle wake events when we see them; they are not given
2641          * higher priority.
2642          */
2643 #ifdef LDAP_DEBUG
2644                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
2645
2646                 for ( i = 0; i < ns; i++ ) {
2647                         int     r, w, fd;
2648
2649                         /* Don't log listener events */
2650                         if ( SLAP_EVENT_IS_LISTENER( i )
2651 #ifdef LDAP_CONNECTIONLESS
2652                                 && !( (SLAP_EVENT_LISTENER( i ))->sl_is_udp )
2653 #endif /* LDAP_CONNECTIONLESS */
2654                                 )
2655                         {
2656                                 continue;
2657                         }
2658
2659                         fd = SLAP_EVENT_FD( i );
2660                         /* Don't log internal wake events */
2661                         if ( fd == wake_sds[0] ) continue;
2662
2663                         r = SLAP_EVENT_IS_READ( i );
2664                         w = SLAP_EVENT_IS_WRITE( i );
2665                         if ( r || w ) {
2666                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", fd,
2667                                     r ? "r" : "", w ? "w" : "" );
2668                         }
2669                 }
2670                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
2671 #endif /* LDAP_DEBUG */
2672
2673                 for ( i = 0; i < ns; i++ ) {
2674                         int rc = 1, fd, w = 0, r = 0;
2675
2676                         if ( SLAP_EVENT_IS_LISTENER( i ) ) {
2677                                 rc = slap_listener_activate( SLAP_EVENT_LISTENER( i ) );
2678                         }
2679
2680                         /* If we found a regular listener, rc is now zero, and we
2681                          * can skip the data portion. But if it was a UDP listener
2682                          * then rc is still 1, and we want to handle the data.
2683                          */
2684                         if ( rc ) {
2685                                 fd = SLAP_EVENT_FD( i );
2686
2687                                 /* Handle wake events */
2688                                 if ( fd == wake_sds[0] ) {
2689                                         char c[BUFSIZ];
2690                                         waking = 0;
2691                                         tcp_read( SLAP_FD2SOCK(wake_sds[0]), c, sizeof(c) );
2692                                         continue;
2693                                 }
2694
2695                                 if ( SLAP_EVENT_IS_WRITE( i ) ) {
2696                                         Debug( LDAP_DEBUG_CONNS,
2697                                                 "daemon: write active on %d\n",
2698                                                 fd, 0, 0 );
2699
2700                                         SLAP_EVENT_CLR_WRITE( i );
2701                                         w = 1;
2702
2703                                         /*
2704                                          * NOTE: it is possible that the connection was closed
2705                                          * and that the stream is now inactive.
2706                                          * connection_write() must valid the stream is still
2707                                          * active.
2708                                          */
2709                                         if ( connection_write( fd ) < 0 ) {
2710                                                 continue;
2711                                         }
2712                                 }
2713                                 /* If event is a read */
2714                                 if ( SLAP_EVENT_IS_READ( i ))
2715                                         r = 1;
2716                                 if ( r || !w ) {
2717                                         Debug( LDAP_DEBUG_CONNS,
2718                                                 "daemon: read active on %d\n",
2719                                                 fd, 0, 0 );
2720
2721                                         if ( r ) {
2722                                                 SLAP_EVENT_CLR_READ( i );
2723                                         } else {
2724 #ifdef HAVE_EPOLL
2725                                                 /* Don't keep reporting the hangup
2726                                                  */
2727                                                 if ( SLAP_SOCK_IS_ACTIVE( fd )) {
2728                                                         SLAP_EPOLL_SOCK_SET( fd, EPOLLET );
2729                                                 }
2730 #endif
2731                                         }
2732                                         connection_read_activate( fd );
2733                                 }
2734                         }
2735                 }
2736 #endif  /* SLAP_EVENTS_ARE_INDEXED */
2737
2738 #ifndef HAVE_YIELDING_SELECT
2739                 ldap_pvt_thread_yield();
2740 #endif /* ! HAVE_YIELDING_SELECT */
2741         }
2742
2743         if ( slapd_shutdown == 1 ) {
2744                 Debug( LDAP_DEBUG_ANY,
2745                         "daemon: shutdown requested and initiated.\n",
2746                         0, 0, 0 );
2747
2748         } else if ( slapd_shutdown == 2 ) {
2749 #ifdef HAVE_NT_SERVICE_MANAGER
2750                         Debug( LDAP_DEBUG_ANY,
2751                                "daemon: shutdown initiated by Service Manager.\n",
2752                                0, 0, 0);
2753 #else /* !HAVE_NT_SERVICE_MANAGER */
2754                         Debug( LDAP_DEBUG_ANY,
2755                                "daemon: abnormal condition, shutdown initiated.\n",
2756                                0, 0, 0 );
2757 #endif /* !HAVE_NT_SERVICE_MANAGER */
2758         } else {
2759                 Debug( LDAP_DEBUG_ANY,
2760                        "daemon: no active streams, shutdown initiated.\n",
2761                        0, 0, 0 );
2762         }
2763
2764         if ( slapd_gentle_shutdown != 2 ) close_listeners ( 0 );
2765
2766         if ( !slapd_gentle_shutdown ) {
2767                 slapd_abrupt_shutdown = 1;
2768                 connections_shutdown();
2769         }
2770
2771         if ( LogTest( LDAP_DEBUG_ANY )) {
2772                 int t = ldap_pvt_thread_pool_backload( &connection_pool );
2773                 Debug( LDAP_DEBUG_ANY,
2774                         "slapd shutdown: waiting for %d operations/tasks to finish\n",
2775                         t, 0, 0 );
2776         }
2777         ldap_pvt_thread_pool_destroy( &connection_pool, 1 );
2778
2779         free( slap_listeners );
2780         slap_listeners = NULL;
2781
2782         return NULL;
2783 }
2784
2785
2786 #ifdef LDAP_CONNECTIONLESS
2787 static int
2788 connectionless_init( void )
2789 {
2790         int l;
2791
2792         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2793                 Listener *lr = slap_listeners[l];
2794                 Connection *c;
2795
2796                 if ( !lr->sl_is_udp ) {
2797                         continue;
2798                 }
2799
2800                 c = connection_init( lr->sl_sd, lr, "", "",
2801                         CONN_IS_UDP, (slap_ssf_t) 0, NULL
2802                         LDAP_PF_LOCAL_SENDMSG_ARG(NULL));
2803
2804                 if ( !c ) {
2805                         Debug( LDAP_DEBUG_TRACE,
2806                                 "connectionless_init: failed on %s (%d)\n",
2807                                 lr->sl_url, lr->sl_sd, 0 );
2808                         return -1;
2809                 }
2810                 lr->sl_is_udp++;
2811         }
2812
2813         return 0;
2814 }
2815 #endif /* LDAP_CONNECTIONLESS */
2816
2817 int
2818 slapd_daemon( void )
2819 {
2820         int rc;
2821
2822 #ifdef LDAP_CONNECTIONLESS
2823         connectionless_init();
2824 #endif /* LDAP_CONNECTIONLESS */
2825
2826 #define SLAPD_LISTENER_THREAD 1
2827 #if defined( SLAPD_LISTENER_THREAD )
2828         {
2829                 ldap_pvt_thread_t       listener_tid;
2830
2831                 /* listener as a separate THREAD */
2832                 rc = ldap_pvt_thread_create( &listener_tid,
2833                         0, slapd_daemon_task, NULL );
2834
2835                 if ( rc != 0 ) {
2836                         Debug( LDAP_DEBUG_ANY,
2837                         "listener ldap_pvt_thread_create failed (%d)\n", rc, 0, 0 );
2838                         return rc;
2839                 }
2840
2841                 /* wait for the listener thread to complete */
2842                 ldap_pvt_thread_join( listener_tid, (void *)NULL );
2843         }
2844 #else /* ! SLAPD_LISTENER_THREAD */
2845         /* experimental code */
2846         slapd_daemon_task( NULL );
2847 #endif /* ! SLAPD_LISTENER_THREAD */
2848
2849         return 0;
2850 }
2851
2852 static int
2853 sockinit( void )
2854 {
2855 #if defined( HAVE_WINSOCK2 )
2856         WORD wVersionRequested;
2857         WSADATA wsaData;
2858         int err;
2859
2860         wVersionRequested = MAKEWORD( 2, 0 );
2861
2862         err = WSAStartup( wVersionRequested, &wsaData );
2863         if ( err != 0 ) {
2864                 /* Tell the user that we couldn't find a usable */
2865                 /* WinSock DLL.                                  */
2866                 return -1;
2867         }
2868
2869         /* Confirm that the WinSock DLL supports 2.0.*/
2870         /* Note that if the DLL supports versions greater    */
2871         /* than 2.0 in addition to 2.0, it will still return */
2872         /* 2.0 in wVersion since that is the version we      */
2873         /* requested.                                        */
2874
2875         if ( LOBYTE( wsaData.wVersion ) != 2 ||
2876                 HIBYTE( wsaData.wVersion ) != 0 )
2877         {
2878             /* Tell the user that we couldn't find a usable */
2879             /* WinSock DLL.                                  */
2880             WSACleanup();
2881             return -1;
2882         }
2883
2884         /* The WinSock DLL is acceptable. Proceed. */
2885 #elif defined( HAVE_WINSOCK )
2886         WSADATA wsaData;
2887         if ( WSAStartup( 0x0101, &wsaData ) != 0 ) return -1;
2888 #endif /* ! HAVE_WINSOCK2 && ! HAVE_WINSOCK */
2889
2890         return 0;
2891 }
2892
2893 static int
2894 sockdestroy( void )
2895 {
2896 #if defined( HAVE_WINSOCK2 ) || defined( HAVE_WINSOCK )
2897         WSACleanup();
2898 #endif /* HAVE_WINSOCK2 || HAVE_WINSOCK */
2899         SLAP_SOCK_DESTROY;
2900
2901         return 0;
2902 }
2903
2904 RETSIGTYPE
2905 slap_sig_shutdown( int sig )
2906 {
2907         int save_errno = errno;
2908
2909 #if 0
2910         Debug(LDAP_DEBUG_TRACE, "slap_sig_shutdown: signal %d\n", sig, 0, 0);
2911 #endif
2912
2913         /*
2914          * If the NT Service Manager is controlling the server, we don't
2915          * want SIGBREAK to kill the server. For some strange reason,
2916          * SIGBREAK is generated when a user logs out.
2917          */
2918
2919 #if defined(HAVE_NT_SERVICE_MANAGER) && defined(SIGBREAK)
2920         if (is_NT_Service && sig == SIGBREAK) {
2921                 /* empty */;
2922         } else
2923 #endif /* HAVE_NT_SERVICE_MANAGER && SIGBREAK */
2924 #ifdef SIGHUP
2925         if (sig == SIGHUP && global_gentlehup && slapd_gentle_shutdown == 0) {
2926                 slapd_gentle_shutdown = 1;
2927         } else
2928 #endif /* SIGHUP */
2929         {
2930                 slapd_shutdown = 1;
2931         }
2932
2933         WAKE_LISTENER(1);
2934
2935         /* reinstall self */
2936         (void) SIGNAL_REINSTALL( sig, slap_sig_shutdown );
2937
2938         errno = save_errno;
2939 }
2940
2941 RETSIGTYPE
2942 slap_sig_wake( int sig )
2943 {
2944         int save_errno = errno;
2945
2946         WAKE_LISTENER(1);
2947
2948         /* reinstall self */
2949         (void) SIGNAL_REINSTALL( sig, slap_sig_wake );
2950
2951         errno = save_errno;
2952 }
2953
2954
2955 void
2956 slapd_add_internal( ber_socket_t s, int isactive )
2957 {
2958         slapd_add( s, isactive, NULL );
2959 }
2960
2961 Listener **
2962 slapd_get_listeners( void )
2963 {
2964         return slap_listeners;
2965 }
2966
2967 void
2968 slap_wake_listener()
2969 {
2970         WAKE_LISTENER(1);
2971 }