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 1998-2011 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 #define MAX_DAEMON_THREADS      16
  77 int slapd_daemon_threads = 1;
  78 int slapd_daemon_mask;
  79
  80 #ifdef LDAP_TCP_BUFFER
  81 int slapd_tcp_rmem;
  82 int slapd_tcp_wmem;
  83 #endif /* LDAP_TCP_BUFFER */
  84
  85 Listener **slap_listeners = NULL;
  86 static volatile sig_atomic_t listening = 1; /* 0 when slap_listeners closed */
  87
  88 #ifndef SLAPD_LISTEN_BACKLOG
  89 #define SLAPD_LISTEN_BACKLOG 1024
  90 #endif /* ! SLAPD_LISTEN_BACKLOG */
  91
  92 #define DAEMON_ID(fd)   (fd & slapd_daemon_mask)
  93
  94 static ber_socket_t wake_sds[MAX_DAEMON_THREADS][2];
  95 static int emfile;
  96
  97 static time_t chk_writetime;
  98
  99 static volatile int waking;
 100 #ifdef NO_THREADS
 101 #define WAKE_LISTENER(l,w)      do { \
 102         if ((w) && ++waking < 5) { \
 103                 tcp_write( SLAP_FD2SOCK(wake_sds[l][1]), "0", 1 ); \
 104         } \
 105 } while (0)
 106 #else /* ! NO_THREADS */
 107 #define WAKE_LISTENER(l,w)      do { \
 108         if (w) { \
 109                 tcp_write( SLAP_FD2SOCK(wake_sds[l][1]), "0", 1 ); \
 110         } \
 111 } while (0)
 112 #endif /* ! NO_THREADS */
 113
 114 volatile sig_atomic_t slapd_shutdown = 0;
 115 volatile sig_atomic_t slapd_gentle_shutdown = 0;
 116 volatile sig_atomic_t slapd_abrupt_shutdown = 0;
 117
 118 #ifdef HAVE_WINSOCK
 119 ldap_pvt_thread_mutex_t slapd_ws_mutex;
 120 SOCKET *slapd_ws_sockets;
 121 #define SD_READ 1
 122 #define SD_WRITE        2
 123 #define SD_ACTIVE       4
 124 #define SD_LISTENER     8
 125 #endif
 126
 127 #ifdef HAVE_TCPD
 128 static ldap_pvt_thread_mutex_t  sd_tcpd_mutex;
 129 #endif /* TCP Wrappers */
 130
 131 typedef struct slap_daemon_st {
 132         ldap_pvt_thread_mutex_t sd_mutex;
 133
 134         ber_socket_t            sd_nactives;
 135         int                     sd_nwriters;
 136         int                     sd_nfds;
 137
 138 #if defined(HAVE_EPOLL)
 139         struct epoll_event      *sd_epolls;
 140         int                     *sd_index;
 141         int                     sd_epfd;
 142 #elif defined(SLAP_X_DEVPOLL) && defined(HAVE_DEVPOLL)
 143         /* eXperimental */
 144         struct pollfd           *sd_pollfd;
 145         int                     *sd_index;
 146         Listener                **sd_l;
 147         int                     sd_dpfd;
 148 #else /* ! epoll && ! /dev/poll */
 149 #ifdef HAVE_WINSOCK
 150         char    *sd_flags;
 151         char    *sd_rflags;
 152 #else /* ! HAVE_WINSOCK */
 153         fd_set                  sd_actives;
 154         fd_set                  sd_readers;
 155         fd_set                  sd_writers;
 156 #endif /* ! HAVE_WINSOCK */
 157 #endif /* ! epoll && ! /dev/poll */
 158 } slap_daemon_st;
 159
 160 static slap_daemon_st slap_daemon[MAX_DAEMON_THREADS];
 161
 162 /*
 163  * NOTE: naming convention for macros:
 164  *
 165  * - SLAP_SOCK_* and SLAP_EVENT_* for public interface that deals
 166  *   with file descriptors and events respectively
 167  *
 168  * - SLAP_<type>_* for private interface; type by now is one of
 169  *   EPOLL, DEVPOLL, SELECT
 170  *
 171  * private interface should not be used in the code.
 172  */
 173 #if defined(HAVE_EPOLL)
 174 /***************************************
 175  * Use epoll infrastructure - epoll(4) *
 176  ***************************************/
 177 # define SLAP_EVENT_FNAME               "epoll"
 178 # define SLAP_EVENTS_ARE_INDEXED        0
 179 # define SLAP_EPOLL_SOCK_IX(t,s)                (slap_daemon[t].sd_index[(s)])
 180 # define SLAP_EPOLL_SOCK_EP(t,s)                (slap_daemon[t].sd_epolls[SLAP_EPOLL_SOCK_IX(t,s)])
 181 # define SLAP_EPOLL_SOCK_EV(t,s)                (SLAP_EPOLL_SOCK_EP(t,s).events)
 182 # define SLAP_SOCK_IS_ACTIVE(t,s)               (SLAP_EPOLL_SOCK_IX(t,s) != -1)
 183 # define SLAP_SOCK_NOT_ACTIVE(t,s)      (SLAP_EPOLL_SOCK_IX(t,s) == -1)
 184 # define SLAP_EPOLL_SOCK_IS_SET(t,s, mode)      (SLAP_EPOLL_SOCK_EV(t,s) & (mode))
 185
 186 # define SLAP_SOCK_IS_READ(t,s)         SLAP_EPOLL_SOCK_IS_SET(t,(s), EPOLLIN)
 187 # define SLAP_SOCK_IS_WRITE(t,s)                SLAP_EPOLL_SOCK_IS_SET(t,(s), EPOLLOUT)
 188
 189 # define SLAP_EPOLL_SOCK_SET(t,s, mode) do { \
 190         if ( (SLAP_EPOLL_SOCK_EV(t,s) & (mode)) != (mode) ) {   \
 191                 SLAP_EPOLL_SOCK_EV(t,s) |= (mode); \
 192                 epoll_ctl( slap_daemon[t].sd_epfd, EPOLL_CTL_MOD, (s), \
 193                         &SLAP_EPOLL_SOCK_EP(t,s) ); \
 194         } \
 195 } while (0)
 196
 197 # define SLAP_EPOLL_SOCK_CLR(t,s, mode) do { \
 198         if ( (SLAP_EPOLL_SOCK_EV(t,s) & (mode)) ) { \
 199                 SLAP_EPOLL_SOCK_EV(t,s) &= ~(mode);     \
 200                 epoll_ctl( slap_daemon[t].sd_epfd, EPOLL_CTL_MOD, s, \
 201                         &SLAP_EPOLL_SOCK_EP(t,s) ); \
 202         } \
 203 } while (0)
 204
 205 # define SLAP_SOCK_SET_READ(t,s)                SLAP_EPOLL_SOCK_SET(t,s, EPOLLIN)
 206 # define SLAP_SOCK_SET_WRITE(t,s)               SLAP_EPOLL_SOCK_SET(t,s, EPOLLOUT)
 207
 208 # define SLAP_SOCK_CLR_READ(t,s)                SLAP_EPOLL_SOCK_CLR(t,(s), EPOLLIN)
 209 # define SLAP_SOCK_CLR_WRITE(t,s)               SLAP_EPOLL_SOCK_CLR(t,(s), EPOLLOUT)
 210
 211 #  define SLAP_SOCK_SET_SUSPEND(t,s) \
 212         ( slap_daemon[t].sd_suspend[SLAP_EPOLL_SOCK_IX(t,s)] = 1 )
 213 #  define SLAP_SOCK_CLR_SUSPEND(t,s) \
 214         ( slap_daemon[t].sd_suspend[SLAP_EPOLL_SOCK_IX(t,s)] = 0 )
 215 #  define SLAP_SOCK_IS_SUSPEND(t,s) \
 216         ( slap_daemon[t].sd_suspend[SLAP_EPOLL_SOCK_IX(t,s)] == 1 )
 217
 218 # define SLAP_EPOLL_EVENT_CLR(i, mode)  (revents[(i)].events &= ~(mode))
 219
 220 # define SLAP_EVENT_MAX(t)                      slap_daemon[t].sd_nfds
 221
 222 /* If a Listener address is provided, store that as the epoll data.
 223  * Otherwise, store the address of this socket's slot in the
 224  * index array. If we can't do this add, the system is out of
 225  * resources and we need to shutdown.
 226  */
 227 # define SLAP_SOCK_ADD(t, s, l)         do { \
 228         int rc; \
 229         SLAP_EPOLL_SOCK_IX(t,(s)) = slap_daemon[t].sd_nfds; \
 230         SLAP_EPOLL_SOCK_EP(t,(s)).data.ptr = (l) ? (l) : (void *)(&SLAP_EPOLL_SOCK_IX(t,s)); \
 231         SLAP_EPOLL_SOCK_EV(t,(s)) = EPOLLIN; \
 232         rc = epoll_ctl(slap_daemon[t].sd_epfd, EPOLL_CTL_ADD, \
 233                 (s), &SLAP_EPOLL_SOCK_EP(t,(s))); \
 234         if ( rc == 0 ) { \
 235                 slap_daemon[t].sd_nfds++; \
 236         } else { \
 237                 Debug( LDAP_DEBUG_ANY, \
 238                         "daemon: epoll_ctl(ADD,fd=%d) failed, errno=%d, shutting down\n", \
 239                         s, errno, 0 ); \
 240                 slapd_shutdown = 2; \
 241         } \
 242 } while (0)
 243
 244 # define SLAP_EPOLL_EV_LISTENER(t,ptr) \
 245         (((int *)(ptr) >= slap_daemon[t].sd_index && \
 246         (int *)(ptr) <= &slap_daemon[t].sd_index[dtblsize]) ? 0 : 1 )
 247
 248 # define SLAP_EPOLL_EV_PTRFD(t,ptr)             (SLAP_EPOLL_EV_LISTENER(t,ptr) ? \
 249         ((Listener *)ptr)->sl_sd : \
 250         (ber_socket_t) ((int *)(ptr) - slap_daemon[t].sd_index))
 251
 252 # define SLAP_SOCK_DEL(t,s)             do { \
 253         int fd, rc, index = SLAP_EPOLL_SOCK_IX(t,(s)); \
 254         if ( index < 0 ) break; \
 255         rc = epoll_ctl(slap_daemon[t].sd_epfd, EPOLL_CTL_DEL, \
 256                 (s), &SLAP_EPOLL_SOCK_EP(t,(s))); \
 257         slap_daemon[t].sd_epolls[index] = \
 258                 slap_daemon[t].sd_epolls[slap_daemon[t].sd_nfds-1]; \
 259         fd = SLAP_EPOLL_EV_PTRFD(t,slap_daemon[t].sd_epolls[index].data.ptr); \
 260         slap_daemon[t].sd_index[fd] = index; \
 261         slap_daemon[t].sd_index[(s)] = -1; \
 262         slap_daemon[t].sd_nfds--; \
 263 } while (0)
 264
 265 # define SLAP_EVENT_CLR_READ(i)         SLAP_EPOLL_EVENT_CLR((i), EPOLLIN)
 266 # define SLAP_EVENT_CLR_WRITE(i)        SLAP_EPOLL_EVENT_CLR((i), EPOLLOUT)
 267
 268 # define SLAP_EPOLL_EVENT_CHK(i, mode)  (revents[(i)].events & mode)
 269
 270 # define SLAP_EVENT_IS_READ(i)          SLAP_EPOLL_EVENT_CHK((i), EPOLLIN)
 271 # define SLAP_EVENT_IS_WRITE(i)         SLAP_EPOLL_EVENT_CHK((i), EPOLLOUT)
 272 # define SLAP_EVENT_IS_LISTENER(t,i)    SLAP_EPOLL_EV_LISTENER(t,revents[(i)].data.ptr)
 273 # define SLAP_EVENT_LISTENER(t,i)               ((Listener *)(revents[(i)].data.ptr))
 274
 275 # define SLAP_EVENT_FD(t,i)             SLAP_EPOLL_EV_PTRFD(t,revents[(i)].data.ptr)
 276
 277 # define SLAP_SOCK_INIT(t)              do { \
 278         int j; \
 279         slap_daemon[t].sd_epolls = ch_calloc(1, \
 280                 ( sizeof(struct epoll_event) * 2 \
 281                         + sizeof(int) ) * dtblsize * 2); \
 282         slap_daemon[t].sd_index = (int *)&slap_daemon[t].sd_epolls[ 2 * dtblsize ]; \
 283         slap_daemon[t].sd_epfd = epoll_create( dtblsize / slapd_daemon_threads ); \
 284         for ( j = 0; j < dtblsize; j++ ) slap_daemon[t].sd_index[j] = -1; \
 285 } while (0)
 286
 287 # define SLAP_SOCK_DESTROY(t)           do { \
 288         if ( slap_daemon[t].sd_epolls != NULL ) { \
 289                 ch_free( slap_daemon[t].sd_epolls ); \
 290                 slap_daemon[t].sd_epolls = NULL; \
 291                 slap_daemon[t].sd_index = NULL; \
 292                 close( slap_daemon[t].sd_epfd ); \
 293         } \
 294 } while ( 0 )
 295
 296 # define SLAP_EVENT_DECL                struct epoll_event *revents
 297
 298 # define SLAP_EVENT_INIT(t)             do { \
 299         revents = slap_daemon[t].sd_epolls + dtblsize; \
 300 } while (0)
 301
 302 # define SLAP_EVENT_WAIT(t, tvp, nsp)   do { \
 303         *(nsp) = epoll_wait( slap_daemon[t].sd_epfd, revents, \
 304                 dtblsize, (tvp) ? (tvp)->tv_sec * 1000 : -1 ); \
 305 } while (0)
 306
 307 #elif defined(SLAP_X_DEVPOLL) && defined(HAVE_DEVPOLL)
 308
 309 /*************************************************************
 310  * Use Solaris' (>= 2.7) /dev/poll infrastructure - poll(7d) *
 311  *************************************************************/
 312 # define SLAP_EVENT_FNAME               "/dev/poll"
 313 # define SLAP_EVENTS_ARE_INDEXED        0
 314 /*
 315  * - sd_index   is used much like with epoll()
 316  * - sd_l       is maintained as an array containing the address
 317  *              of the listener; the index is the fd itself
 318  * - sd_pollfd  is used to keep track of what data has been
 319  *              registered in /dev/poll
 320  */
 321 # define SLAP_DEVPOLL_SOCK_IX(t,s)      (slap_daemon[t].sd_index[(s)])
 322 # define SLAP_DEVPOLL_SOCK_LX(t,s)      (slap_daemon[t].sd_l[(s)])
 323 # define SLAP_DEVPOLL_SOCK_EP(t,s)      (slap_daemon[t].sd_pollfd[SLAP_DEVPOLL_SOCK_IX(t,(s))])
 324 # define SLAP_DEVPOLL_SOCK_FD(t,s)      (SLAP_DEVPOLL_SOCK_EP(t,(s)).fd)
 325 # define SLAP_DEVPOLL_SOCK_EV(t,s)      (SLAP_DEVPOLL_SOCK_EP(t,(s)).events)
 326 # define SLAP_SOCK_IS_ACTIVE(t,s)               (SLAP_DEVPOLL_SOCK_IX(t,(s)) != -1)
 327 # define SLAP_SOCK_NOT_ACTIVE(t,s)      (SLAP_DEVPOLL_SOCK_IX(t,(s)) == -1)
 328 # define SLAP_SOCK_IS_SET(t,s, mode)    (SLAP_DEVPOLL_SOCK_EV(t,(s)) & (mode))
 329
 330 # define SLAP_SOCK_IS_READ(t,s)         SLAP_SOCK_IS_SET(t,(s), POLLIN)
 331 # define SLAP_SOCK_IS_WRITE(t,s)                SLAP_SOCK_IS_SET(t,(s), POLLOUT)
 332
 333 /* as far as I understand, any time we need to communicate with the kernel
 334  * about the number and/or properties of a file descriptor we need it to
 335  * wait for, we have to rewrite the whole set */
 336 # define SLAP_DEVPOLL_WRITE_POLLFD(t,s, pfd, n, what, shdn)     do { \
 337         int rc; \
 338         size_t size = (n) * sizeof( struct pollfd ); \
 339         /* FIXME: use pwrite? */ \
 340         rc = write( slap_daemon[t].sd_dpfd, (pfd), size ); \
 341         if ( rc != size ) { \
 342                 Debug( LDAP_DEBUG_ANY, "daemon: " SLAP_EVENT_FNAME ": " \
 343                         "%s fd=%d failed errno=%d\n", \
 344                         (what), (s), errno ); \
 345                 if ( (shdn) ) { \
 346                         slapd_shutdown = 2; \
 347                 } \
 348         } \
 349 } while (0)
 350
 351 # define SLAP_DEVPOLL_SOCK_SET(t,s, mode)       do { \
 352         Debug( LDAP_DEBUG_CONNS, "SLAP_SOCK_SET_%s(%d)=%d\n", \
 353                 (mode) == POLLIN ? "READ" : "WRITE", (s), \
 354                 ( (SLAP_DEVPOLL_SOCK_EV(t,(s)) & (mode)) != (mode) ) ); \
 355         if ( (SLAP_DEVPOLL_SOCK_EV(t,(s)) & (mode)) != (mode) ) { \
 356                 struct pollfd pfd; \
 357                 SLAP_DEVPOLL_SOCK_EV(t,(s)) |= (mode); \
 358                 pfd.fd = SLAP_DEVPOLL_SOCK_FD(t,(s)); \
 359                 pfd.events = /* (mode) */ SLAP_DEVPOLL_SOCK_EV(t,(s)); \
 360                 SLAP_DEVPOLL_WRITE_POLLFD(t,(s), &pfd, 1, "SET", 0); \
 361         } \
 362 } while (0)
 363
 364 # define SLAP_DEVPOLL_SOCK_CLR(t,s, mode)               do { \
 365         Debug( LDAP_DEBUG_CONNS, "SLAP_SOCK_CLR_%s(%d)=%d\n", \
 366                 (mode) == POLLIN ? "READ" : "WRITE", (s), \
 367                 ( (SLAP_DEVPOLL_SOCK_EV(t,(s)) & (mode)) == (mode) ) ); \
 368         if ((SLAP_DEVPOLL_SOCK_EV(t,(s)) & (mode)) == (mode) ) { \
 369                 struct pollfd pfd[2]; \
 370                 SLAP_DEVPOLL_SOCK_EV(t,(s)) &= ~(mode); \
 371                 pfd[0].fd = SLAP_DEVPOLL_SOCK_FD(t,(s)); \
 372                 pfd[0].events = POLLREMOVE; \
 373                 pfd[1] = SLAP_DEVPOLL_SOCK_EP(t,(s)); \
 374                 SLAP_DEVPOLL_WRITE_POLLFD(t,(s), &pfd[0], 2, "CLR", 0); \
 375         } \
 376 } while (0)
 377
 378 # define SLAP_SOCK_SET_READ(t,s)                SLAP_DEVPOLL_SOCK_SET(t,s, POLLIN)
 379 # define SLAP_SOCK_SET_WRITE(t,s)               SLAP_DEVPOLL_SOCK_SET(t,s, POLLOUT)
 380
 381 # define SLAP_SOCK_CLR_READ(t,s)                SLAP_DEVPOLL_SOCK_CLR(t,(s), POLLIN)
 382 # define SLAP_SOCK_CLR_WRITE(t,s)               SLAP_DEVPOLL_SOCK_CLR(t,(s), POLLOUT)
 383
 384 #  define SLAP_SOCK_SET_SUSPEND(t,s) \
 385         ( slap_daemon[t].sd_suspend[SLAP_DEVPOLL_SOCK_IX(t,(s))] = 1 )
 386 #  define SLAP_SOCK_CLR_SUSPEND(t,s) \
 387         ( slap_daemon[t].sd_suspend[SLAP_DEVPOLL_SOCK_IX(t,(s))] = 0 )
 388 #  define SLAP_SOCK_IS_SUSPEND(t,s) \
 389         ( slap_daemon[t].sd_suspend[SLAP_DEVPOLL_SOCK_IX(t,(s))] == 1 )
 390
 391 # define SLAP_DEVPOLL_EVENT_CLR(i, mode)        (revents[(i)].events &= ~(mode))
 392
 393 # define SLAP_EVENT_MAX(t)                      slap_daemon[t].sd_nfds
 394
 395 /* If a Listener address is provided, store that in the sd_l array.
 396  * If we can't do this add, the system is out of resources and we
 397  * need to shutdown.
 398  */
 399 # define SLAP_SOCK_ADD(t, s, l)         do { \
 400         Debug( LDAP_DEBUG_CONNS, "SLAP_SOCK_ADD(%d, %p)\n", (s), (l), 0 ); \
 401         SLAP_DEVPOLL_SOCK_IX(t,(s)) = slap_daemon[t].sd_nfds; \
 402         SLAP_DEVPOLL_SOCK_LX(t,(s)) = (l); \
 403         SLAP_DEVPOLL_SOCK_FD(t,(s)) = (s); \
 404         SLAP_DEVPOLL_SOCK_EV(t,(s)) = POLLIN; \
 405         SLAP_DEVPOLL_WRITE_POLLFD(t,(s), &SLAP_DEVPOLL_SOCK_EP((s)), 1, "ADD", 1); \
 406         slap_daemon[t].sd_nfds++; \
 407 } while (0)
 408
 409 # define SLAP_DEVPOLL_EV_LISTENER(ptr)  ((ptr) != NULL)
 410
 411 # define SLAP_SOCK_DEL(t,s)             do { \
 412         int fd, index = SLAP_DEVPOLL_SOCK_IX(t,(s)); \
 413         Debug( LDAP_DEBUG_CONNS, "SLAP_SOCK_DEL(%d)\n", (s), 0, 0 ); \
 414         if ( index < 0 ) break; \
 415         if ( index < slap_daemon[t].sd_nfds - 1 ) { \
 416                 struct pollfd pfd = slap_daemon[t].sd_pollfd[index]; \
 417                 fd = slap_daemon[t].sd_pollfd[slap_daemon[t].sd_nfds - 1].fd; \
 418                 slap_daemon[t].sd_pollfd[index] = slap_daemon[t].sd_pollfd[slap_daemon[t].sd_nfds - 1]; \
 419                 slap_daemon[t].sd_pollfd[slap_daemon[t].sd_nfds - 1] = pfd; \
 420                 slap_daemon[t].sd_index[fd] = index; \
 421         } \
 422         slap_daemon[t].sd_index[(s)] = -1; \
 423         slap_daemon[t].sd_pollfd[slap_daemon[t].sd_nfds - 1].events = POLLREMOVE; \
 424         SLAP_DEVPOLL_WRITE_POLLFD(t,(s), &slap_daemon[t].sd_pollfd[slap_daemon[t].sd_nfds - 1], 1, "DEL", 0); \
 425         slap_daemon[t].sd_pollfd[slap_daemon[t].sd_nfds - 1].events = 0; \
 426         slap_daemon[t].sd_nfds--; \
 427 } while (0)
 428
 429 # define SLAP_EVENT_CLR_READ(i)         SLAP_DEVPOLL_EVENT_CLR((i), POLLIN)
 430 # define SLAP_EVENT_CLR_WRITE(i)        SLAP_DEVPOLL_EVENT_CLR((i), POLLOUT)
 431
 432 # define SLAP_DEVPOLL_EVENT_CHK(i, mode)        (revents[(i)].events & (mode))
 433
 434 # define SLAP_EVENT_FD(t,i)             (revents[(i)].fd)
 435
 436 # define SLAP_EVENT_IS_READ(i)          SLAP_DEVPOLL_EVENT_CHK((i), POLLIN)
 437 # define SLAP_EVENT_IS_WRITE(i)         SLAP_DEVPOLL_EVENT_CHK((i), POLLOUT)
 438 # define SLAP_EVENT_IS_LISTENER(t,i)    SLAP_DEVPOLL_EV_LISTENER(SLAP_DEVPOLL_SOCK_LX(SLAP_EVENT_FD(t,(i))))
 439 # define SLAP_EVENT_LISTENER(t,i)               SLAP_DEVPOLL_SOCK_LX(SLAP_EVENT_FD(t,(i)))
 440
 441 # define SLAP_SOCK_INIT(t)              do { \
 442         slap_daemon[t].sd_pollfd = ch_calloc( 1, \
 443                 ( sizeof(struct pollfd) * 2 \
 444                         + sizeof( int ) \
 445                         + sizeof( Listener * ) ) * dtblsize ); \
 446         slap_daemon[t].sd_index = (int *)&slap_daemon[t].sd_pollfd[ 2 * dtblsize ]; \
 447         slap_daemon[t].sd_l = (Listener **)&slap_daemon[t].sd_index[ dtblsize ]; \
 448         slap_daemon[t].sd_dpfd = open( SLAP_EVENT_FNAME, O_RDWR ); \
 449         if ( slap_daemon[t].sd_dpfd == -1 ) { \
 450                 Debug( LDAP_DEBUG_ANY, "daemon: " SLAP_EVENT_FNAME ": " \
 451                         "open(\"" SLAP_EVENT_FNAME "\") failed errno=%d\n", \
 452                         errno, 0, 0 ); \
 453                 SLAP_SOCK_DESTROY; \
 454                 return -1; \
 455         } \
 456         for ( i = 0; i < dtblsize; i++ ) { \
 457                 slap_daemon[t].sd_pollfd[i].fd = -1; \
 458                 slap_daemon[t].sd_index[i] = -1; \
 459         } \
 460 } while (0)
 461
 462 # define SLAP_SOCK_DESTROY(t)           do { \
 463         if ( slap_daemon[t].sd_pollfd != NULL ) { \
 464                 ch_free( slap_daemon[t].sd_pollfd ); \
 465                 slap_daemon[t].sd_pollfd = NULL; \
 466                 slap_daemon[t].sd_index = NULL; \
 467                 slap_daemon[t].sd_l = NULL; \
 468                 close( slap_daemon[t].sd_dpfd ); \
 469         } \
 470 } while ( 0 )
 471
 472 # define SLAP_EVENT_DECL                struct pollfd *revents
 473
 474 # define SLAP_EVENT_INIT(t)             do { \
 475         revents = &slap_daemon[t].sd_pollfd[ dtblsize ]; \
 476 } while (0)
 477
 478 # define SLAP_EVENT_WAIT(t, tvp, nsp)   do { \
 479         struct dvpoll           sd_dvpoll; \
 480         sd_dvpoll.dp_timeout = (tvp) ? (tvp)->tv_sec * 1000 : -1; \
 481         sd_dvpoll.dp_nfds = dtblsize; \
 482         sd_dvpoll.dp_fds = revents; \
 483         *(nsp) = ioctl( slap_daemon[t].sd_dpfd, DP_POLL, &sd_dvpoll ); \
 484 } while (0)
 485
 486 #else /* ! epoll && ! /dev/poll */
 487 # ifdef HAVE_WINSOCK
 488 # define SLAP_EVENT_FNAME               "WSselect"
 489 /* Winsock provides a "select" function but its fd_sets are
 490  * actually arrays of sockets. Since these sockets are handles
 491  * and not a contiguous range of small integers, we manage our
 492  * own "fd" table of socket handles and use their indices as
 493  * descriptors.
 494  *
 495  * All of our listener/connection structures use fds; the actual
 496  * I/O functions use sockets. The SLAP_FD2SOCK macro in proto-slap.h
 497  * handles the mapping.
 498  *
 499  * Despite the mapping overhead, this is about 45% more efficient
 500  * than just using Winsock's select and FD_ISSET directly.
 501  *
 502  * Unfortunately Winsock's select implementation doesn't scale well
 503  * as the number of connections increases. This probably needs to be
 504  * rewritten to use the Winsock overlapped/asynchronous I/O functions.
 505  */
 506 # define SLAP_EVENTS_ARE_INDEXED        1
 507 # define SLAP_EVENT_DECL                fd_set readfds, writefds; char *rflags
 508 # define SLAP_EVENT_INIT(t)     do { \
 509         int i; \
 510         FD_ZERO( &readfds ); \
 511         FD_ZERO( &writefds ); \
 512         rflags = slap_daemon[t].sd_rflags; \
 513         memset( rflags, 0, slap_daemon[t].sd_nfds ); \
 514         for ( i=0; i<slap_daemon[t].sd_nfds; i++ ) { \
 515                 if ( slap_daemon[t].sd_flags[i] & SD_READ ) \
 516                         FD_SET( slapd_ws_sockets[i], &readfds );\
 517                 if ( slap_daemon[t].sd_flags[i] & SD_WRITE ) \
 518                         FD_SET( slapd_ws_sockets[i], &writefds ); \
 519         } } while ( 0 )
 520
 521 # define SLAP_EVENT_MAX(t)              slap_daemon[t].sd_nfds
 522
 523 # define SLAP_EVENT_WAIT(t, tvp, nsp)   do { \
 524         int i; \
 525         *(nsp) = select( SLAP_EVENT_MAX(t), &readfds, \
 526                 nwriters > 0 ? &writefds : NULL, NULL, (tvp) ); \
 527         for ( i=0; i<readfds.fd_count; i++) { \
 528                 int fd = slapd_sock2fd(readfds.fd_array[i]); \
 529                 if ( fd >= 0 ) { \
 530                         slap_daemon[t].sd_rflags[fd] = SD_READ; \
 531                         if ( fd >= *(nsp)) *(nsp) = fd+1; \
 532                 } \
 533         } \
 534         for ( i=0; i<writefds.fd_count; i++) { \
 535                 int fd = slapd_sock2fd(writefds.fd_array[i]); \
 536                 if ( fd >= 0 ) { \
 537                         slap_daemon[t].sd_rflags[fd] = SD_WRITE; \
 538                         if ( fd >= *(nsp)) *(nsp) = fd+1; \
 539                 } \
 540         } \
 541 } while (0)
 542
 543 # define SLAP_EVENT_IS_READ(fd)         (rflags[fd] & SD_READ)
 544 # define SLAP_EVENT_IS_WRITE(fd)        (rflags[fd] & SD_WRITE)
 545
 546 # define SLAP_EVENT_CLR_READ(fd)        rflags[fd] &= ~SD_READ
 547 # define SLAP_EVENT_CLR_WRITE(fd)       rflags[fd] &= ~SD_WRITE
 548
 549 # define SLAP_SOCK_INIT(t)              do { \
 550         if (!t) { \
 551         ldap_pvt_thread_mutex_init( &slapd_ws_mutex ); \
 552         slapd_ws_sockets = ch_malloc( dtblsize * ( sizeof(SOCKET) + 2)); \
 553         memset( slapd_ws_sockets, -1, dtblsize * sizeof(SOCKET) ); \
 554         } \
 555         slap_daemon[t].sd_flags = (char *)(slapd_ws_sockets + dtblsize); \
 556         slap_daemon[t].sd_rflags = slap_daemon[t].sd_flags + dtblsize; \
 557         memset( slap_daemon[t].sd_flags, 0, dtblsize ); \
 558         slapd_ws_sockets[t*2] = wake_sds[t][0]; \
 559         slapd_ws_sockets[t*2+1] = wake_sds[t][1]; \
 560         wake_sds[t][0] = t*2; \
 561         wake_sds[t][1] = t*2+1; \
 562         slap_daemon[t].sd_nfds = t*2 + 2; \
 563         } while ( 0 )
 564
 565 # define SLAP_SOCK_DESTROY(t)   do { \
 566         ch_free( slapd_ws_sockets ); slapd_ws_sockets = NULL; \
 567         slap_daemon[t].sd_flags = NULL; \
 568         slap_daemon[t].sd_rflags = NULL; \
 569         ldap_pvt_thread_mutex_destroy( &slapd_ws_mutex ); \
 570         } while ( 0 )
 571
 572 # define SLAP_SOCK_IS_ACTIVE(t,fd) ( slap_daemon[t].sd_flags[fd] & SD_ACTIVE )
 573 # define SLAP_SOCK_IS_READ(t,fd) ( slap_daemon[t].sd_flags[fd] & SD_READ )
 574 # define SLAP_SOCK_IS_WRITE(t,fd) ( slap_daemon[t].sd_flags[fd] & SD_WRITE )
 575 # define SLAP_SOCK_NOT_ACTIVE(t,fd)     (!slap_daemon[t].sd_flags[fd])
 576
 577 # define SLAP_SOCK_SET_READ(t,fd)               ( slap_daemon[t].sd_flags[fd] |= SD_READ )
 578 # define SLAP_SOCK_SET_WRITE(t,fd)              ( slap_daemon[t].sd_flags[fd] |= SD_WRITE )
 579
 580 # define SLAP_SELECT_ADDTEST(t,s)       do { \
 581         if ((s) >= slap_daemon[t].sd_nfds) slap_daemon[t].sd_nfds = (s)+1; \
 582 } while (0)
 583
 584 # define SLAP_SOCK_CLR_READ(t,fd)               ( slap_daemon[t].sd_flags[fd] &= ~SD_READ )
 585 # define SLAP_SOCK_CLR_WRITE(t,fd)              ( slap_daemon[t].sd_flags[fd] &= ~SD_WRITE )
 586
 587 # define SLAP_SOCK_ADD(t,s, l)  do { \
 588         SLAP_SELECT_ADDTEST(t,(s)); \
 589         slap_daemon[t].sd_flags[s] = SD_ACTIVE|SD_READ; \
 590 } while ( 0 )
 591
 592 # define SLAP_SOCK_DEL(t,s) do { \
 593         slap_daemon[t].sd_flags[s] = 0; \
 594         slapd_sockdel( s ); \
 595 } while ( 0 )
 596
 597 # else /* !HAVE_WINSOCK */
 598
 599 /**************************************
 600  * Use select system call - select(2) *
 601  **************************************/
 602 # define SLAP_EVENT_FNAME               "select"
 603 /* select */
 604 # define SLAP_EVENTS_ARE_INDEXED        1
 605 # define SLAP_EVENT_DECL                fd_set readfds, writefds
 606
 607 # define SLAP_EVENT_INIT(t)             do { \
 608         AC_MEMCPY( &readfds, &slap_daemon[t].sd_readers, sizeof(fd_set) );      \
 609         if ( nwriters ) { \
 610                 AC_MEMCPY( &writefds, &slap_daemon[t].sd_writers, sizeof(fd_set) ); \
 611         } else { \
 612                 FD_ZERO( &writefds ); \
 613         } \
 614 } while (0)
 615
 616 # ifdef FD_SETSIZE
 617 #  define SLAP_SELECT_CHK_SETSIZE       do { \
 618         if (dtblsize > FD_SETSIZE) dtblsize = FD_SETSIZE; \
 619 } while (0)
 620 # else /* ! FD_SETSIZE */
 621 #  define SLAP_SELECT_CHK_SETSIZE       do { ; } while (0)
 622 # endif /* ! FD_SETSIZE */
 623
 624 # define SLAP_SOCK_INIT(t)                      do { \
 625         SLAP_SELECT_CHK_SETSIZE; \
 626         FD_ZERO(&slap_daemon[t].sd_actives); \
 627         FD_ZERO(&slap_daemon[t].sd_readers); \
 628         FD_ZERO(&slap_daemon[t].sd_writers); \
 629 } while (0)
 630
 631 # define SLAP_SOCK_DESTROY(t)
 632
 633 # define SLAP_SOCK_IS_ACTIVE(t,fd)      FD_ISSET((fd), &slap_daemon[t].sd_actives)
 634 # define SLAP_SOCK_IS_READ(t,fd)                FD_ISSET((fd), &slap_daemon[t].sd_readers)
 635 # define SLAP_SOCK_IS_WRITE(t,fd)               FD_ISSET((fd), &slap_daemon[t].sd_writers)
 636
 637 # define SLAP_SOCK_NOT_ACTIVE(t,fd)     (!SLAP_SOCK_IS_ACTIVE(t,fd) && \
 638          !SLAP_SOCK_IS_READ(t,fd) && !SLAP_SOCK_IS_WRITE(t,fd))
 639
 640 # define SLAP_SOCK_SET_READ(t,fd)       FD_SET((fd), &slap_daemon[t].sd_readers)
 641 # define SLAP_SOCK_SET_WRITE(t,fd)      FD_SET((fd), &slap_daemon[t].sd_writers)
 642
 643 # define SLAP_EVENT_MAX(t)              slap_daemon[t].sd_nfds
 644 # define SLAP_SELECT_ADDTEST(t,s)       do { \
 645         if ((s) >= slap_daemon[t].sd_nfds) slap_daemon[t].sd_nfds = (s)+1; \
 646 } while (0)
 647
 648 # define SLAP_SOCK_CLR_READ(t,fd)               FD_CLR((fd), &slap_daemon[t].sd_readers)
 649 # define SLAP_SOCK_CLR_WRITE(t,fd)      FD_CLR((fd), &slap_daemon[t].sd_writers)
 650
 651 # define SLAP_SOCK_ADD(t,s, l)          do { \
 652         SLAP_SELECT_ADDTEST(t,(s)); \
 653         FD_SET((s), &slap_daemon[t].sd_actives); \
 654         FD_SET((s), &slap_daemon[t].sd_readers); \
 655 } while (0)
 656
 657 # define SLAP_SOCK_DEL(t,s)             do { \
 658         FD_CLR((s), &slap_daemon[t].sd_actives); \
 659         FD_CLR((s), &slap_daemon[t].sd_readers); \
 660         FD_CLR((s), &slap_daemon[t].sd_writers); \
 661 } while (0)
 662
 663 # define SLAP_EVENT_IS_READ(fd)         FD_ISSET((fd), &readfds)
 664 # define SLAP_EVENT_IS_WRITE(fd)        FD_ISSET((fd), &writefds)
 665
 666 # define SLAP_EVENT_CLR_READ(fd)        FD_CLR((fd), &readfds)
 667 # define SLAP_EVENT_CLR_WRITE(fd)       FD_CLR((fd), &writefds)
 668
 669 # define SLAP_EVENT_WAIT(t, tvp, nsp)   do { \
 670         *(nsp) = select( SLAP_EVENT_MAX(t), &readfds, \
 671                 nwriters > 0 ? &writefds : NULL, NULL, (tvp) ); \
 672 } while (0)
 673 # endif /* !HAVE_WINSOCK */
 674 #endif /* ! epoll && ! /dev/poll */
 675
 676 #ifdef HAVE_SLP
 677 /*
 678  * SLP related functions
 679  */
 680 #include <slp.h>
 681
 682 #define LDAP_SRVTYPE_PREFIX "service:ldap://"
 683 #define LDAPS_SRVTYPE_PREFIX "service:ldaps://"
 684 static char** slapd_srvurls = NULL;
 685 static SLPHandle slapd_hslp = 0;
 686 int slapd_register_slp = 0;
 687 const char *slapd_slp_attrs = NULL;
 688
 689 static SLPError slapd_slp_cookie;
 690
 691 static void
 692 slapd_slp_init( const char* urls )
 693 {
 694         int i;
 695         SLPError err;
 696
 697         slapd_srvurls = ldap_str2charray( urls, " " );
 698
 699         if ( slapd_srvurls == NULL ) return;
 700
 701         /* find and expand INADDR_ANY URLs */
 702         for ( i = 0; slapd_srvurls[i] != NULL; i++ ) {
 703                 if ( strcmp( slapd_srvurls[i], "ldap:///" ) == 0 ) {
 704                         slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i],
 705                                 global_host_bv.bv_len +
 706                                 sizeof( LDAP_SRVTYPE_PREFIX ) );
 707                         strcpy( lutil_strcopy(slapd_srvurls[i],
 708                                 LDAP_SRVTYPE_PREFIX ), global_host_bv.bv_val );
 709                 } else if ( strcmp( slapd_srvurls[i], "ldaps:///" ) == 0 ) {
 710                         slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i],
 711                                 global_host_bv.bv_len +
 712                                 sizeof( LDAPS_SRVTYPE_PREFIX ) );
 713                         strcpy( lutil_strcopy(slapd_srvurls[i],
 714                                 LDAPS_SRVTYPE_PREFIX ), global_host_bv.bv_val );
 715                 }
 716         }
 717
 718         /* open the SLP handle */
 719         err = SLPOpen( "en", 0, &slapd_hslp );
 720
 721         if ( err != SLP_OK ) {
 722                 Debug( LDAP_DEBUG_CONNS, "daemon: SLPOpen() failed with %ld\n",
 723                         (long)err, 0, 0 );
 724         }
 725 }
 726
 727 static void
 728 slapd_slp_deinit( void )
 729 {
 730         if ( slapd_srvurls == NULL ) return;
 731
 732         ldap_charray_free( slapd_srvurls );
 733         slapd_srvurls = NULL;
 734
 735         /* close the SLP handle */
 736         SLPClose( slapd_hslp );
 737 }
 738
 739 static void
 740 slapd_slp_regreport(
 741         SLPHandle       hslp,
 742         SLPError        errcode,
 743         void            *cookie )
 744 {
 745         /* return the error code in the cookie */
 746         *(SLPError*)cookie = errcode;
 747 }
 748
 749 static void
 750 slapd_slp_reg()
 751 {
 752         int i;
 753         SLPError err;
 754
 755         if ( slapd_srvurls == NULL ) return;
 756
 757         for ( i = 0; slapd_srvurls[i] != NULL; i++ ) {
 758                 if ( strncmp( slapd_srvurls[i], LDAP_SRVTYPE_PREFIX,
 759                                 sizeof( LDAP_SRVTYPE_PREFIX ) - 1 ) == 0 ||
 760                         strncmp( slapd_srvurls[i], LDAPS_SRVTYPE_PREFIX,
 761                                 sizeof( LDAPS_SRVTYPE_PREFIX ) - 1 ) == 0 )
 762                 {
 763                         err = SLPReg( slapd_hslp,
 764                                 slapd_srvurls[i],
 765                                 SLP_LIFETIME_MAXIMUM,
 766                                 "ldap",
 767                                 (slapd_slp_attrs) ? slapd_slp_attrs : "",
 768                                 SLP_TRUE,
 769                                 slapd_slp_regreport,
 770                                 &slapd_slp_cookie );
 771
 772                         if ( err != SLP_OK || slapd_slp_cookie != SLP_OK ) {
 773                                 Debug( LDAP_DEBUG_CONNS,
 774                                         "daemon: SLPReg(%s) failed with %ld, cookie = %ld\n",
 775                                         slapd_srvurls[i], (long)err, (long)slapd_slp_cookie );
 776                         }
 777                 }
 778         }
 779 }
 780
 781 static void
 782 slapd_slp_dereg( void )
 783 {
 784         int i;
 785         SLPError err;
 786
 787         if ( slapd_srvurls == NULL ) return;
 788
 789         for ( i = 0; slapd_srvurls[i] != NULL; i++ ) {
 790                 err = SLPDereg( slapd_hslp,
 791                         slapd_srvurls[i],
 792                         slapd_slp_regreport,
 793                         &slapd_slp_cookie );
 794
 795                 if ( err != SLP_OK || slapd_slp_cookie != SLP_OK ) {
 796                         Debug( LDAP_DEBUG_CONNS,
 797                                 "daemon: SLPDereg(%s) failed with %ld, cookie = %ld\n",
 798                                 slapd_srvurls[i], (long)err, (long)slapd_slp_cookie );
 799                 }
 800         }
 801 }
 802 #endif /* HAVE_SLP */
 803
 804 #ifdef HAVE_WINSOCK
 805 /* Manage the descriptor to socket table */
 806 ber_socket_t
 807 slapd_socknew( ber_socket_t s )
 808 {
 809         ber_socket_t i;
 810         ldap_pvt_thread_mutex_lock( &slapd_ws_mutex );
 811         for ( i = 0; i < dtblsize && slapd_ws_sockets[i] != INVALID_SOCKET; i++ );
 812         if ( i == dtblsize ) {
 813                 WSASetLastError( WSAEMFILE );
 814         } else {
 815                 slapd_ws_sockets[i] = s;
 816         }
 817         ldap_pvt_thread_mutex_unlock( &slapd_ws_mutex );
 818         return i;
 819 }
 820
 821 void
 822 slapd_sockdel( ber_socket_t s )
 823 {
 824         ldap_pvt_thread_mutex_lock( &slapd_ws_mutex );
 825         slapd_ws_sockets[s] = INVALID_SOCKET;
 826         ldap_pvt_thread_mutex_unlock( &slapd_ws_mutex );
 827 }
 828
 829 ber_socket_t
 830 slapd_sock2fd( ber_socket_t s )
 831 {
 832         ber_socket_t i;
 833         for ( i=0; i<dtblsize && slapd_ws_sockets[i] != s; i++);
 834         if ( i == dtblsize )
 835                 i = -1;
 836         return i;
 837 }
 838 #endif
 839
 840 /*
 841  * Add a descriptor to daemon control
 842  *
 843  * If isactive, the descriptor is a live server session and is subject
 844  * to idletimeout control. Otherwise, the descriptor is a passive
 845  * listener or an outbound client session, and not subject to
 846  * idletimeout. The underlying event handler may record the Listener
 847  * argument to differentiate Listener's from real sessions.
 848  */
 849 static void
 850 slapd_add( ber_socket_t s, int isactive, Listener *sl, int id )
 851 {
 852         if (id < 0)
 853                 id = DAEMON_ID(s);
 854         ldap_pvt_thread_mutex_lock( &slap_daemon[id].sd_mutex );
 855
 856         assert( SLAP_SOCK_NOT_ACTIVE(id, s) );
 857
 858         if ( isactive ) slap_daemon[id].sd_nactives++;
 859
 860         SLAP_SOCK_ADD(id, s, sl);
 861
 862         Debug( LDAP_DEBUG_CONNS, "daemon: added %ldr%s listener=%p\n",
 863                 (long) s, isactive ? " (active)" : "", (void *)sl );
 864
 865         ldap_pvt_thread_mutex_unlock( &slap_daemon[id].sd_mutex );
 866
 867         WAKE_LISTENER(id,1);
 868 }
 869
 870 /*
 871  * Remove the descriptor from daemon control
 872  */
 873 void
 874 slapd_remove(
 875         ber_socket_t s,
 876         Sockbuf *sb,
 877         int wasactive,
 878         int wake,
 879         int locked )
 880 {
 881         int waswriter;
 882         int wasreader;
 883         int id = DAEMON_ID(s);
 884
 885         if ( !locked )
 886                 ldap_pvt_thread_mutex_lock( &slap_daemon[id].sd_mutex );
 887
 888         assert( SLAP_SOCK_IS_ACTIVE( id, s ));
 889
 890         if ( wasactive ) slap_daemon[id].sd_nactives--;
 891
 892         waswriter = SLAP_SOCK_IS_WRITE(id, s);
 893         wasreader = SLAP_SOCK_IS_READ(id, s);
 894
 895         Debug( LDAP_DEBUG_CONNS, "daemon: removing %ld%s%s\n",
 896                 (long) s,
 897                 wasreader ? "r" : "",
 898                 waswriter ? "w" : "" );
 899
 900         if ( waswriter ) slap_daemon[id].sd_nwriters--;
 901
 902         SLAP_SOCK_DEL(id, s);
 903
 904         if ( sb )
 905                 ber_sockbuf_free(sb);
 906
 907         /* If we ran out of file descriptors, we dropped a listener from
 908          * the select() loop. Now that we're removing a session from our
 909          * control, we can try to resume a dropped listener to use.
 910          */
 911         if ( emfile && listening ) {
 912                 int i;
 913                 for ( i = 0; slap_listeners[i] != NULL; i++ ) {
 914                         Listener *lr = slap_listeners[i];
 915
 916                         if ( lr->sl_sd == AC_SOCKET_INVALID ) continue;
 917                         if ( lr->sl_sd == s ) continue;
 918                         if ( lr->sl_mute ) {
 919                                 lr->sl_mute = 0;
 920                                 emfile--;
 921                                 if ( DAEMON_ID(lr->sl_sd) != id )
 922                                         WAKE_LISTENER(DAEMON_ID(lr->sl_sd), wake);
 923                                 break;
 924                         }
 925                 }
 926                 /* Walked the entire list without enabling anything; emfile
 927                  * counter is stale. Reset it.
 928                  */
 929                 if ( slap_listeners[i] == NULL ) emfile = 0;
 930         }
 931         ldap_pvt_thread_mutex_unlock( &slap_daemon[id].sd_mutex );
 932         WAKE_LISTENER(id, wake || slapd_gentle_shutdown == 2);
 933 }
 934
 935 void
 936 slapd_clr_write( ber_socket_t s, int wake )
 937 {
 938         int id = DAEMON_ID(s);
 939         ldap_pvt_thread_mutex_lock( &slap_daemon[id].sd_mutex );
 940
 941         if ( SLAP_SOCK_IS_WRITE( id, s )) {
 942                 assert( SLAP_SOCK_IS_ACTIVE( id, s ));
 943
 944                 SLAP_SOCK_CLR_WRITE( id, s );
 945                 slap_daemon[id].sd_nwriters--;
 946         }
 947
 948         ldap_pvt_thread_mutex_unlock( &slap_daemon[id].sd_mutex );
 949         WAKE_LISTENER(id,wake);
 950 }
 951
 952 void
 953 slapd_set_write( ber_socket_t s, int wake )
 954 {
 955         int id = DAEMON_ID(s);
 956         ldap_pvt_thread_mutex_lock( &slap_daemon[id].sd_mutex );
 957
 958         assert( SLAP_SOCK_IS_ACTIVE( id, s ));
 959
 960         if ( !SLAP_SOCK_IS_WRITE( id, s )) {
 961                 SLAP_SOCK_SET_WRITE( id, s );
 962                 slap_daemon[id].sd_nwriters++;
 963         }
 964         if (( wake & 2 ) && global_writetimeout && !chk_writetime ) {
 965                 if (id)
 966                         ldap_pvt_thread_mutex_lock( &slap_daemon[0].sd_mutex );
 967                 if (!chk_writetime)
 968                         chk_writetime = slap_get_time();
 969                 if (id)
 970                         ldap_pvt_thread_mutex_unlock( &slap_daemon[0].sd_mutex );
 971         }
 972
 973         ldap_pvt_thread_mutex_unlock( &slap_daemon[id].sd_mutex );
 974         WAKE_LISTENER(id,wake);
 975 }
 976
 977 int
 978 slapd_clr_read( ber_socket_t s, int wake )
 979 {
 980         int rc = 1;
 981         int id = DAEMON_ID(s);
 982         ldap_pvt_thread_mutex_lock( &slap_daemon[id].sd_mutex );
 983
 984         if ( SLAP_SOCK_IS_ACTIVE( id, s )) {
 985                 SLAP_SOCK_CLR_READ( id, s );
 986                 rc = 0;
 987         }
 988         ldap_pvt_thread_mutex_unlock( &slap_daemon[id].sd_mutex );
 989         if ( !rc )
 990                 WAKE_LISTENER(id,wake);
 991         return rc;
 992 }
 993
 994 void
 995 slapd_set_read( ber_socket_t s, int wake )
 996 {
 997         int do_wake = 1;
 998         int id = DAEMON_ID(s);
 999         ldap_pvt_thread_mutex_lock( &slap_daemon[id].sd_mutex );
1000
1001         if( SLAP_SOCK_IS_ACTIVE( id, s ) && !SLAP_SOCK_IS_READ( id, s )) {
1002                 SLAP_SOCK_SET_READ( id, s );
1003         } else {
1004                 do_wake = 0;
1005         }
1006         ldap_pvt_thread_mutex_unlock( &slap_daemon[id].sd_mutex );
1007         if ( do_wake )
1008                 WAKE_LISTENER(id,wake);
1009 }
1010
1011 time_t
1012 slapd_get_writetime()
1013 {
1014         time_t cur;
1015         ldap_pvt_thread_mutex_lock( &slap_daemon[0].sd_mutex );
1016         cur = chk_writetime;
1017         ldap_pvt_thread_mutex_unlock( &slap_daemon[0].sd_mutex );
1018         return cur;
1019 }
1020
1021 void
1022 slapd_clr_writetime( time_t old )
1023 {
1024         ldap_pvt_thread_mutex_lock( &slap_daemon[0].sd_mutex );
1025         if ( chk_writetime == old )
1026                 chk_writetime = 0;
1027         ldap_pvt_thread_mutex_unlock( &slap_daemon[0].sd_mutex );
1028 }
1029
1030 static void
1031 slapd_close( ber_socket_t s )
1032 {
1033         Debug( LDAP_DEBUG_CONNS, "daemon: closing %ld\n",
1034                 (long) s, 0, 0 );
1035         tcp_close( SLAP_FD2SOCK(s) );
1036 #ifdef HAVE_WINSOCK
1037         slapd_sockdel( s );
1038 #endif
1039 }
1040
1041 static void
1042 slap_free_listener_addresses( struct sockaddr **sal )
1043 {
1044         struct sockaddr **sap;
1045         if (sal == NULL) return;
1046         for (sap = sal; *sap != NULL; sap++) ch_free(*sap);
1047         ch_free(sal);
1048 }
1049
1050 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
1051 static int
1052 get_url_perms(
1053         char    **exts,
1054         mode_t  *perms,
1055         int     *crit )
1056 {
1057         int     i;
1058
1059         assert( exts != NULL );
1060         assert( perms != NULL );
1061         assert( crit != NULL );
1062
1063         *crit = 0;
1064         for ( i = 0; exts[ i ]; i++ ) {
1065                 char    *type = exts[ i ];
1066                 int     c = 0;
1067
1068                 if ( type[ 0 ] == '!' ) {
1069                         c = 1;
1070                         type++;
1071                 }
1072
1073                 if ( strncasecmp( type, LDAPI_MOD_URLEXT "=",
1074                         sizeof(LDAPI_MOD_URLEXT "=") - 1 ) == 0 )
1075                 {
1076                         char *value = type + ( sizeof(LDAPI_MOD_URLEXT "=") - 1 );
1077                         mode_t p = 0;
1078                         int j;
1079
1080                         switch (strlen(value)) {
1081                         case 4:
1082                                 /* skip leading '0' */
1083                                 if ( value[ 0 ] != '0' ) return LDAP_OTHER;
1084                                 value++;
1085
1086                         case 3:
1087                                 for ( j = 0; j < 3; j++) {
1088                                         int     v;
1089
1090                                         v = value[ j ] - '0';
1091
1092                                         if ( v < 0 || v > 7 ) return LDAP_OTHER;
1093
1094                                         p |= v << 3*(2-j);
1095                                 }
1096                                 break;
1097
1098                         case 10:
1099                                 for ( j = 1; j < 10; j++ ) {
1100                                         static mode_t   m[] = { 0,
1101                                                 S_IRUSR, S_IWUSR, S_IXUSR,
1102                                                 S_IRGRP, S_IWGRP, S_IXGRP,
1103                                                 S_IROTH, S_IWOTH, S_IXOTH
1104                                         };
1105                                         static const char       c[] = "-rwxrwxrwx";
1106
1107                                         if ( value[ j ] == c[ j ] ) {
1108                                                 p |= m[ j ];
1109
1110                                         } else if ( value[ j ] != '-' ) {
1111                                                 return LDAP_OTHER;
1112                                         }
1113                                 }
1114                                 break;
1115
1116                         default:
1117                                 return LDAP_OTHER;
1118                         }
1119
1120                         *crit = c;
1121                         *perms = p;
1122
1123                         return LDAP_SUCCESS;
1124                 }
1125         }
1126
1127         return LDAP_OTHER;
1128 }
1129 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
1130
1131 /* port = 0 indicates AF_LOCAL */
1132 static int
1133 slap_get_listener_addresses(
1134         const char *host,
1135         unsigned short port,
1136         struct sockaddr ***sal )
1137 {
1138         struct sockaddr **sap;
1139
1140 #ifdef LDAP_PF_LOCAL
1141         if ( port == 0 ) {
1142                 *sal = ch_malloc(2 * sizeof(void *));
1143                 if (*sal == NULL) return -1;
1144
1145                 sap = *sal;
1146                 *sap = ch_malloc(sizeof(struct sockaddr_un));
1147                 if (*sap == NULL) goto errexit;
1148                 sap[1] = NULL;
1149
1150                 if ( strlen(host) >
1151                         (sizeof(((struct sockaddr_un *)*sap)->sun_path) - 1) )
1152                 {
1153                         Debug( LDAP_DEBUG_ANY,
1154                                 "daemon: domain socket path (%s) too long in URL",
1155                                 host, 0, 0);
1156                         goto errexit;
1157                 }
1158
1159                 (void)memset( (void *)*sap, '\0', sizeof(struct sockaddr_un) );
1160                 (*sap)->sa_family = AF_LOCAL;
1161                 strcpy( ((struct sockaddr_un *)*sap)->sun_path, host );
1162         } else
1163 #endif /* LDAP_PF_LOCAL */
1164         {
1165 #ifdef HAVE_GETADDRINFO
1166                 struct addrinfo hints, *res, *sai;
1167                 int n, err;
1168                 char serv[7];
1169
1170                 memset( &hints, '\0', sizeof(hints) );
1171                 hints.ai_flags = AI_PASSIVE;
1172                 hints.ai_socktype = SOCK_STREAM;
1173                 hints.ai_family = slap_inet4or6;
1174                 snprintf(serv, sizeof serv, "%d", port);
1175
1176                 if ( (err = getaddrinfo(host, serv, &hints, &res)) ) {
1177                         Debug( LDAP_DEBUG_ANY, "daemon: getaddrinfo() failed: %s\n",
1178                                 AC_GAI_STRERROR(err), 0, 0);
1179                         return -1;
1180                 }
1181
1182                 sai = res;
1183                 for (n=2; (sai = sai->ai_next) != NULL; n++) {
1184                         /* EMPTY */ ;
1185                 }
1186                 *sal = ch_calloc(n, sizeof(void *));
1187                 if (*sal == NULL) return -1;
1188
1189                 sap = *sal;
1190                 *sap = NULL;
1191
1192                 for ( sai=res; sai; sai=sai->ai_next ) {
1193                         if( sai->ai_addr == NULL ) {
1194                                 Debug( LDAP_DEBUG_ANY, "slap_get_listener_addresses: "
1195                                         "getaddrinfo ai_addr is NULL?\n", 0, 0, 0 );
1196                                 freeaddrinfo(res);
1197                                 goto errexit;
1198                         }
1199
1200                         switch (sai->ai_family) {
1201 #  ifdef LDAP_PF_INET6
1202                         case AF_INET6:
1203                                 *sap = ch_malloc(sizeof(struct sockaddr_in6));
1204                                 if (*sap == NULL) {
1205                                         freeaddrinfo(res);
1206                                         goto errexit;
1207                                 }
1208                                 *(struct sockaddr_in6 *)*sap =
1209                                         *((struct sockaddr_in6 *)sai->ai_addr);
1210                                 break;
1211 #  endif /* LDAP_PF_INET6 */
1212                         case AF_INET:
1213                                 *sap = ch_malloc(sizeof(struct sockaddr_in));
1214                                 if (*sap == NULL) {
1215                                         freeaddrinfo(res);
1216                                         goto errexit;
1217                                 }
1218                                 *(struct sockaddr_in *)*sap =
1219                                         *((struct sockaddr_in *)sai->ai_addr);
1220                                 break;
1221                         default:
1222                                 *sap = NULL;
1223                                 break;
1224                         }
1225
1226                         if (*sap != NULL) {
1227                                 (*sap)->sa_family = sai->ai_family;
1228                                 sap++;
1229                                 *sap = NULL;
1230                         }
1231                 }
1232
1233                 freeaddrinfo(res);
1234
1235 #else /* ! HAVE_GETADDRINFO */
1236                 int i, n = 1;
1237                 struct in_addr in;
1238                 struct hostent *he = NULL;
1239
1240                 if ( host == NULL ) {
1241                         in.s_addr = htonl(INADDR_ANY);
1242
1243                 } else if ( !inet_aton( host, &in ) ) {
1244                         he = gethostbyname( host );
1245                         if( he == NULL ) {
1246                                 Debug( LDAP_DEBUG_ANY,
1247                                         "daemon: invalid host %s", host, 0, 0);
1248                                 return -1;
1249                         }
1250                         for (n = 0; he->h_addr_list[n]; n++) /* empty */;
1251                 }
1252
1253                 *sal = ch_malloc((n+1) * sizeof(void *));
1254                 if (*sal == NULL) return -1;
1255
1256                 sap = *sal;
1257                 for ( i = 0; i<n; i++ ) {
1258                         sap[i] = ch_malloc(sizeof(struct sockaddr_in));
1259                         if (*sap == NULL) goto errexit;
1260
1261                         (void)memset( (void *)sap[i], '\0', sizeof(struct sockaddr_in) );
1262                         sap[i]->sa_family = AF_INET;
1263                         ((struct sockaddr_in *)sap[i])->sin_port = htons(port);
1264                         AC_MEMCPY( &((struct sockaddr_in *)sap[i])->sin_addr,
1265                                 he ? (struct in_addr *)he->h_addr_list[i] : &in,
1266                                 sizeof(struct in_addr) );
1267                 }
1268                 sap[i] = NULL;
1269 #endif /* ! HAVE_GETADDRINFO */
1270         }
1271
1272         return 0;
1273
1274 errexit:
1275         slap_free_listener_addresses(*sal);
1276         return -1;
1277 }
1278
1279 static int
1280 slap_open_listener(
1281         const char* url,
1282         int *listeners,
1283         int *cur )
1284 {
1285         int     num, tmp, rc;
1286         Listener l;
1287         Listener *li;
1288         LDAPURLDesc *lud;
1289         unsigned short port;
1290         int err, addrlen = 0;
1291         struct sockaddr **sal, **psal;
1292         int socktype = SOCK_STREAM;     /* default to COTS */
1293         ber_socket_t s;
1294
1295 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
1296         /*
1297          * use safe defaults
1298          */
1299         int     crit = 1;
1300 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
1301
1302         rc = ldap_url_parse( url, &lud );
1303
1304         if( rc != LDAP_URL_SUCCESS ) {
1305                 Debug( LDAP_DEBUG_ANY,
1306                         "daemon: listen URL \"%s\" parse error=%d\n",
1307                         url, rc, 0 );
1308                 return rc;
1309         }
1310
1311         l.sl_url.bv_val = NULL;
1312         l.sl_mute = 0;
1313         l.sl_busy = 0;
1314
1315 #ifndef HAVE_TLS
1316         if( ldap_pvt_url_scheme2tls( lud->lud_scheme ) ) {
1317                 Debug( LDAP_DEBUG_ANY, "daemon: TLS not supported (%s)\n",
1318                         url, 0, 0 );
1319                 ldap_free_urldesc( lud );
1320                 return -1;
1321         }
1322
1323         if(! lud->lud_port ) lud->lud_port = LDAP_PORT;
1324
1325 #else /* HAVE_TLS */
1326         l.sl_is_tls = ldap_pvt_url_scheme2tls( lud->lud_scheme );
1327
1328         if(! lud->lud_port ) {
1329                 lud->lud_port = l.sl_is_tls ? LDAPS_PORT : LDAP_PORT;
1330         }
1331 #endif /* HAVE_TLS */
1332
1333 #ifdef LDAP_TCP_BUFFER
1334         l.sl_tcp_rmem = 0;
1335         l.sl_tcp_wmem = 0;
1336 #endif /* LDAP_TCP_BUFFER */
1337
1338         port = (unsigned short) lud->lud_port;
1339
1340         tmp = ldap_pvt_url_scheme2proto(lud->lud_scheme);
1341         if ( tmp == LDAP_PROTO_IPC ) {
1342 #ifdef LDAP_PF_LOCAL
1343                 if ( lud->lud_host == NULL || lud->lud_host[0] == '\0' ) {
1344                         err = slap_get_listener_addresses(LDAPI_SOCK, 0, &sal);
1345                 } else {
1346                         err = slap_get_listener_addresses(lud->lud_host, 0, &sal);
1347                 }
1348 #else /* ! LDAP_PF_LOCAL */
1349
1350                 Debug( LDAP_DEBUG_ANY, "daemon: URL scheme not supported: %s",
1351                         url, 0, 0);
1352                 ldap_free_urldesc( lud );
1353                 return -1;
1354 #endif /* ! LDAP_PF_LOCAL */
1355         } else {
1356                 if( lud->lud_host == NULL || lud->lud_host[0] == '\0'
1357                         || strcmp(lud->lud_host, "*") == 0 )
1358                 {
1359                         err = slap_get_listener_addresses(NULL, port, &sal);
1360                 } else {
1361                         err = slap_get_listener_addresses(lud->lud_host, port, &sal);
1362                 }
1363         }
1364
1365 #ifdef LDAP_CONNECTIONLESS
1366         l.sl_is_udp = ( tmp == LDAP_PROTO_UDP );
1367 #endif /* LDAP_CONNECTIONLESS */
1368
1369 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
1370         if ( lud->lud_exts ) {
1371                 err = get_url_perms( lud->lud_exts, &l.sl_perms, &crit );
1372         } else {
1373                 l.sl_perms = S_IRWXU | S_IRWXO;
1374         }
1375 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
1376
1377         ldap_free_urldesc( lud );
1378         if ( err ) return -1;
1379
1380         /* If we got more than one address returned, we need to make space
1381          * for it in the slap_listeners array.
1382          */
1383         for ( num=0; sal[num]; num++ ) /* empty */;
1384         if ( num > 1 ) {
1385                 *listeners += num-1;
1386                 slap_listeners = ch_realloc( slap_listeners,
1387                         (*listeners + 1) * sizeof(Listener *) );
1388         }
1389
1390         psal = sal;
1391         while ( *sal != NULL ) {
1392                 char *af;
1393                 switch( (*sal)->sa_family ) {
1394                 case AF_INET:
1395                         af = "IPv4";
1396                         break;
1397 #ifdef LDAP_PF_INET6
1398                 case AF_INET6:
1399                         af = "IPv6";
1400                         break;
1401 #endif /* LDAP_PF_INET6 */
1402 #ifdef LDAP_PF_LOCAL
1403                 case AF_LOCAL:
1404                         af = "Local";
1405                         break;
1406 #endif /* LDAP_PF_LOCAL */
1407                 default:
1408                         sal++;
1409                         continue;
1410                 }
1411
1412 #ifdef LDAP_CONNECTIONLESS
1413                 if( l.sl_is_udp ) socktype = SOCK_DGRAM;
1414 #endif /* LDAP_CONNECTIONLESS */
1415
1416                 s = socket( (*sal)->sa_family, socktype, 0);
1417                 if ( s == AC_SOCKET_INVALID ) {
1418                         int err = sock_errno();
1419                         Debug( LDAP_DEBUG_ANY,
1420                                 "daemon: %s socket() failed errno=%d (%s)\n",
1421                                 af, err, sock_errstr(err) );
1422                         sal++;
1423                         continue;
1424                 }
1425                 l.sl_sd = SLAP_SOCKNEW( s );
1426
1427                 if ( l.sl_sd >= dtblsize ) {
1428                         Debug( LDAP_DEBUG_ANY,
1429                                 "daemon: listener descriptor %ld is too great %ld\n",
1430                                 (long) l.sl_sd, (long) dtblsize, 0 );
1431                         tcp_close( s );
1432                         sal++;
1433                         continue;
1434                 }
1435
1436 #ifdef LDAP_PF_LOCAL
1437                 if ( (*sal)->sa_family == AF_LOCAL ) {
1438                         unlink( ((struct sockaddr_un *)*sal)->sun_path );
1439                 } else
1440 #endif /* LDAP_PF_LOCAL */
1441                 {
1442 #ifdef SO_REUSEADDR
1443                         /* enable address reuse */
1444                         tmp = 1;
1445                         rc = setsockopt( s, SOL_SOCKET, SO_REUSEADDR,
1446                                 (char *) &tmp, sizeof(tmp) );
1447                         if ( rc == AC_SOCKET_ERROR ) {
1448                                 int err = sock_errno();
1449                                 Debug( LDAP_DEBUG_ANY, "slapd(%ld): "
1450                                         "setsockopt(SO_REUSEADDR) failed errno=%d (%s)\n",
1451                                         (long) l.sl_sd, err, sock_errstr(err) );
1452                         }
1453 #endif /* SO_REUSEADDR */
1454                 }
1455
1456                 switch( (*sal)->sa_family ) {
1457                 case AF_INET:
1458                         addrlen = sizeof(struct sockaddr_in);
1459                         break;
1460 #ifdef LDAP_PF_INET6
1461                 case AF_INET6:
1462 #ifdef IPV6_V6ONLY
1463                         /* Try to use IPv6 sockets for IPv6 only */
1464                         tmp = 1;
1465                         rc = setsockopt( s , IPPROTO_IPV6, IPV6_V6ONLY,
1466                                 (char *) &tmp, sizeof(tmp) );
1467                         if ( rc == AC_SOCKET_ERROR ) {
1468                                 int err = sock_errno();
1469                                 Debug( LDAP_DEBUG_ANY, "slapd(%ld): "
1470                                         "setsockopt(IPV6_V6ONLY) failed errno=%d (%s)\n",
1471                                         (long) l.sl_sd, err, sock_errstr(err) );
1472                         }
1473 #endif /* IPV6_V6ONLY */
1474                         addrlen = sizeof(struct sockaddr_in6);
1475                         break;
1476 #endif /* LDAP_PF_INET6 */
1477
1478 #ifdef LDAP_PF_LOCAL
1479                 case AF_LOCAL:
1480 #ifdef LOCAL_CREDS
1481                         {
1482                                 int one = 1;
1483                                 setsockopt( s, 0, LOCAL_CREDS, &one, sizeof( one ) );
1484                         }
1485 #endif /* LOCAL_CREDS */
1486
1487                         addrlen = sizeof( struct sockaddr_un );
1488                         break;
1489 #endif /* LDAP_PF_LOCAL */
1490                 }
1491
1492 #ifdef LDAP_PF_LOCAL
1493                 /* create socket with all permissions set for those systems
1494                  * that honor permissions on sockets (e.g. Linux); typically,
1495                  * only write is required.  To exploit filesystem permissions,
1496                  * place the socket in a directory and use directory's
1497                  * permissions.  Need write perms to the directory to
1498                  * create/unlink the socket; likely need exec perms to access
1499                  * the socket (ITS#4709) */
1500                 {
1501                         mode_t old_umask = 0;
1502
1503                         if ( (*sal)->sa_family == AF_LOCAL ) {
1504                                 old_umask = umask( 0 );
1505                         }
1506 #endif /* LDAP_PF_LOCAL */
1507                         rc = bind( s, *sal, addrlen );
1508 #ifdef LDAP_PF_LOCAL
1509                         if ( old_umask != 0 ) {
1510                                 umask( old_umask );
1511                         }
1512                 }
1513 #endif /* LDAP_PF_LOCAL */
1514                 if ( rc ) {
1515                         err = sock_errno();
1516                         Debug( LDAP_DEBUG_ANY,
1517                                 "daemon: bind(%ld) failed errno=%d (%s)\n",
1518                                 (long)l.sl_sd, err, sock_errstr( err ) );
1519                         tcp_close( s );
1520                         sal++;
1521                         continue;
1522                 }
1523
1524                 switch ( (*sal)->sa_family ) {
1525 #ifdef LDAP_PF_LOCAL
1526                 case AF_LOCAL: {
1527                         char *path = ((struct sockaddr_un *)*sal)->sun_path;
1528                         l.sl_name.bv_len = strlen(path) + STRLENOF("PATH=");
1529                         l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len + 1 );
1530                         snprintf( l.sl_name.bv_val, l.sl_name.bv_len + 1,
1531                                 "PATH=%s", path );
1532                 } break;
1533 #endif /* LDAP_PF_LOCAL */
1534
1535                 case AF_INET: {
1536                         char addr[INET_ADDRSTRLEN];
1537                         const char *s;
1538 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
1539                         s = inet_ntop( AF_INET, &((struct sockaddr_in *)*sal)->sin_addr,
1540                                 addr, sizeof(addr) );
1541 #else /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1542                         s = inet_ntoa( ((struct sockaddr_in *) *sal)->sin_addr );
1543 #endif /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1544                         if (!s) s = SLAP_STRING_UNKNOWN;
1545                         port = ntohs( ((struct sockaddr_in *)*sal) ->sin_port );
1546                         l.sl_name.bv_val =
1547                                 ber_memalloc( sizeof("IP=255.255.255.255:65535") );
1548                         snprintf( l.sl_name.bv_val, sizeof("IP=255.255.255.255:65535"),
1549                                 "IP=%s:%d", s, port );
1550                         l.sl_name.bv_len = strlen( l.sl_name.bv_val );
1551                 } break;
1552
1553 #ifdef LDAP_PF_INET6
1554                 case AF_INET6: {
1555                         char addr[INET6_ADDRSTRLEN];
1556                         const char *s;
1557                         s = inet_ntop( AF_INET6, &((struct sockaddr_in6 *)*sal)->sin6_addr,
1558                                 addr, sizeof addr);
1559                         if (!s) s = SLAP_STRING_UNKNOWN;
1560                         port = ntohs( ((struct sockaddr_in6 *)*sal)->sin6_port );
1561                         l.sl_name.bv_len = strlen(s) + sizeof("IP=[]:65535");
1562                         l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len );
1563                         snprintf( l.sl_name.bv_val, l.sl_name.bv_len, "IP=[%s]:%d",
1564                                 s, port );
1565                         l.sl_name.bv_len = strlen( l.sl_name.bv_val );
1566                 } break;
1567 #endif /* LDAP_PF_INET6 */
1568
1569                 default:
1570                         Debug( LDAP_DEBUG_ANY, "daemon: unsupported address family (%d)\n",
1571                                 (int) (*sal)->sa_family, 0, 0 );
1572                         break;
1573                 }
1574
1575                 AC_MEMCPY(&l.sl_sa, *sal, addrlen);
1576                 ber_str2bv( url, 0, 1, &l.sl_url);
1577                 li = ch_malloc( sizeof( Listener ) );
1578                 *li = l;
1579                 slap_listeners[*cur] = li;
1580                 (*cur)++;
1581                 sal++;
1582         }
1583
1584         slap_free_listener_addresses(psal);
1585
1586         if ( l.sl_url.bv_val == NULL ) {
1587                 Debug( LDAP_DEBUG_TRACE,
1588                         "slap_open_listener: failed on %s\n", url, 0, 0 );
1589                 return -1;
1590         }
1591
1592         Debug( LDAP_DEBUG_TRACE, "daemon: listener initialized %s\n",
1593                 l.sl_url.bv_val, 0, 0 );
1594         return 0;
1595 }
1596
1597 static int sockinit(void);
1598 static int sockdestroy(void);
1599
1600 static int daemon_inited = 0;
1601
1602 int
1603 slapd_daemon_init( const char *urls )
1604 {
1605         int i, j, n, rc;
1606         char **u;
1607
1608         Debug( LDAP_DEBUG_ARGS, "daemon_init: %s\n",
1609                 urls ? urls : "<null>", 0, 0 );
1610
1611         for ( i=0; i<MAX_DAEMON_THREADS; i++ ) {
1612                 wake_sds[i][0] = AC_SOCKET_INVALID;
1613                 wake_sds[i][1] = AC_SOCKET_INVALID;
1614         }
1615
1616         ldap_pvt_thread_mutex_init( &slap_daemon[0].sd_mutex );
1617 #ifdef HAVE_TCPD
1618         ldap_pvt_thread_mutex_init( &sd_tcpd_mutex );
1619 #endif /* TCP Wrappers */
1620
1621         daemon_inited = 1;
1622
1623         if( (rc = sockinit()) != 0 ) return rc;
1624
1625 #ifdef HAVE_SYSCONF
1626         dtblsize = sysconf( _SC_OPEN_MAX );
1627 #elif defined(HAVE_GETDTABLESIZE)
1628         dtblsize = getdtablesize();
1629 #else /* ! HAVE_SYSCONF && ! HAVE_GETDTABLESIZE */
1630         dtblsize = FD_SETSIZE;
1631 #endif /* ! HAVE_SYSCONF && ! HAVE_GETDTABLESIZE */
1632
1633         /* open a pipe (or something equivalent connected to itself).
1634          * we write a byte on this fd whenever we catch a signal. The main
1635          * loop will be select'ing on this socket, and will wake up when
1636          * this byte arrives.
1637          */
1638         if( (rc = lutil_pair( wake_sds[0] )) < 0 ) {
1639                 Debug( LDAP_DEBUG_ANY,
1640                         "daemon: lutil_pair() failed rc=%d\n", rc, 0, 0 );
1641                 return rc;
1642         }
1643         ber_pvt_socket_set_nonblock( wake_sds[0][1], 1 );
1644
1645         SLAP_SOCK_INIT(0);
1646
1647         if( urls == NULL ) urls = "ldap:///";
1648
1649         u = ldap_str2charray( urls, " " );
1650
1651         if( u == NULL || u[0] == NULL ) {
1652                 Debug( LDAP_DEBUG_ANY, "daemon_init: no urls (%s) provided.\n",
1653                         urls, 0, 0 );
1654                 if ( u )
1655                         ldap_charray_free( u );
1656                 return -1;
1657         }
1658
1659         for( i=0; u[i] != NULL; i++ ) {
1660                 Debug( LDAP_DEBUG_TRACE, "daemon_init: listen on %s\n",
1661                         u[i], 0, 0 );
1662         }
1663
1664         if( i == 0 ) {
1665                 Debug( LDAP_DEBUG_ANY, "daemon_init: no listeners to open (%s)\n",
1666                         urls, 0, 0 );
1667                 ldap_charray_free( u );
1668                 return -1;
1669         }
1670
1671         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners to open...\n",
1672                 i, 0, 0 );
1673         slap_listeners = ch_malloc( (i+1)*sizeof(Listener *) );
1674
1675         for(n = 0, j = 0; u[n]; n++ ) {
1676                 if ( slap_open_listener( u[n], &i, &j ) ) {
1677                         ldap_charray_free( u );
1678                         return -1;
1679                 }
1680         }
1681         slap_listeners[j] = NULL;
1682
1683         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners opened\n",
1684                 i, 0, 0 );
1685
1686
1687 #ifdef HAVE_SLP
1688         if( slapd_register_slp ) {
1689                 slapd_slp_init( urls );
1690                 slapd_slp_reg();
1691         }
1692 #endif /* HAVE_SLP */
1693
1694         ldap_charray_free( u );
1695
1696         return !i;
1697 }
1698
1699
1700 int
1701 slapd_daemon_destroy( void )
1702 {
1703         connections_destroy();
1704         if ( daemon_inited ) {
1705                 int i;
1706
1707                 for ( i=0; i<slapd_daemon_threads; i++ ) {
1708 #ifdef HAVE_WINSOCK
1709                         if ( wake_sds[i][1] != INVALID_SOCKET &&
1710                                 SLAP_FD2SOCK( wake_sds[i][1] ) != SLAP_FD2SOCK( wake_sds[i][0] ))
1711 #endif /* HAVE_WINSOCK */
1712                                 tcp_close( SLAP_FD2SOCK(wake_sds[i][1]) );
1713 #ifdef HAVE_WINSOCK
1714                         if ( wake_sds[i][0] != INVALID_SOCKET )
1715 #endif /* HAVE_WINSOCK */
1716                                 tcp_close( SLAP_FD2SOCK(wake_sds[i][0]) );
1717                         ldap_pvt_thread_mutex_destroy( &slap_daemon[i].sd_mutex );
1718                         SLAP_SOCK_DESTROY(i);
1719                 }
1720                 daemon_inited = 0;
1721 #ifdef HAVE_TCPD
1722                 ldap_pvt_thread_mutex_destroy( &sd_tcpd_mutex );
1723 #endif /* TCP Wrappers */
1724         }
1725         sockdestroy();
1726
1727 #ifdef HAVE_SLP
1728         if( slapd_register_slp ) {
1729                 slapd_slp_dereg();
1730                 slapd_slp_deinit();
1731         }
1732 #endif /* HAVE_SLP */
1733
1734         return 0;
1735 }
1736
1737
1738 static void
1739 close_listeners(
1740         int remove )
1741 {
1742         int l;
1743
1744         if ( !listening )
1745                 return;
1746         listening = 0;
1747
1748         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1749                 Listener *lr = slap_listeners[l];
1750
1751                 if ( lr->sl_sd != AC_SOCKET_INVALID ) {
1752                         int s = lr->sl_sd;
1753                         lr->sl_sd = AC_SOCKET_INVALID;
1754                         if ( remove ) slapd_remove( s, NULL, 0, 0, 0 );
1755
1756 #ifdef LDAP_PF_LOCAL
1757                         if ( lr->sl_sa.sa_addr.sa_family == AF_LOCAL ) {
1758                                 unlink( lr->sl_sa.sa_un_addr.sun_path );
1759                         }
1760 #endif /* LDAP_PF_LOCAL */
1761
1762                         slapd_close( s );
1763                 }
1764         }
1765 }
1766
1767 static void
1768 destroy_listeners( void )
1769 {
1770         Listener *lr, **ll = slap_listeners;
1771
1772         if ( ll == NULL )
1773                 return;
1774
1775         while ( (lr = *ll++) != NULL ) {
1776                 if ( lr->sl_url.bv_val ) {
1777                         ber_memfree( lr->sl_url.bv_val );
1778                 }
1779
1780                 if ( lr->sl_name.bv_val ) {
1781                         ber_memfree( lr->sl_name.bv_val );
1782                 }
1783
1784                 free( lr );
1785         }
1786
1787         free( slap_listeners );
1788         slap_listeners = NULL;
1789 }
1790
1791 static int
1792 slap_listener(
1793         Listener *sl )
1794 {
1795         Sockaddr                from;
1796
1797         ber_socket_t s, sfd;
1798         ber_socklen_t len = sizeof(from);
1799         Connection *c;
1800         slap_ssf_t ssf = 0;
1801         struct berval authid = BER_BVNULL;
1802 #ifdef SLAPD_RLOOKUPS
1803         char hbuf[NI_MAXHOST];
1804 #endif /* SLAPD_RLOOKUPS */
1805
1806         char    *dnsname = NULL;
1807         const char *peeraddr = NULL;
1808         /* we assume INET6_ADDRSTRLEN > INET_ADDRSTRLEN */
1809         char addr[INET6_ADDRSTRLEN];
1810 #ifdef LDAP_PF_LOCAL
1811         char peername[MAXPATHLEN + sizeof("PATH=")];
1812 #ifdef LDAP_PF_LOCAL_SENDMSG
1813         char peerbuf[8];
1814         struct berval peerbv = BER_BVNULL;
1815 #endif
1816 #elif defined(LDAP_PF_INET6)
1817         char peername[sizeof("IP=[ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff]:65535")];
1818 #else /* ! LDAP_PF_LOCAL && ! LDAP_PF_INET6 */
1819         char peername[sizeof("IP=255.255.255.255:65336")];
1820 #endif /* LDAP_PF_LOCAL */
1821         int cflag;
1822         int tid;
1823
1824         Debug( LDAP_DEBUG_TRACE,
1825                 ">>> slap_listener(%s)\n",
1826                 sl->sl_url.bv_val, 0, 0 );
1827
1828         peername[0] = '\0';
1829
1830 #ifdef LDAP_CONNECTIONLESS
1831         if ( sl->sl_is_udp ) return 1;
1832 #endif /* LDAP_CONNECTIONLESS */
1833
1834 #  ifdef LDAP_PF_LOCAL
1835         /* FIXME: apparently accept doesn't fill
1836          * the sun_path sun_path member */
1837         from.sa_un_addr.sun_path[0] = '\0';
1838 #  endif /* LDAP_PF_LOCAL */
1839
1840         s = accept( SLAP_FD2SOCK( sl->sl_sd ), (struct sockaddr *) &from, &len );
1841
1842         /* Resume the listener FD to allow concurrent-processing of
1843          * additional incoming connections.
1844          */
1845         sl->sl_busy = 0;
1846         WAKE_LISTENER(DAEMON_ID(sl->sl_sd),1);
1847
1848         if ( s == AC_SOCKET_INVALID ) {
1849                 int err = sock_errno();
1850
1851                 if(
1852 #ifdef EMFILE
1853                     err == EMFILE ||
1854 #endif /* EMFILE */
1855 #ifdef ENFILE
1856                     err == ENFILE ||
1857 #endif /* ENFILE */
1858                     0 )
1859                 {
1860                         ldap_pvt_thread_mutex_lock( &slap_daemon[0].sd_mutex );
1861                         emfile++;
1862                         /* Stop listening until an existing session closes */
1863                         sl->sl_mute = 1;
1864                         ldap_pvt_thread_mutex_unlock( &slap_daemon[0].sd_mutex );
1865                 }
1866
1867                 Debug( LDAP_DEBUG_ANY,
1868                         "daemon: accept(%ld) failed errno=%d (%s)\n",
1869                         (long) sl->sl_sd, err, sock_errstr(err) );
1870                 ldap_pvt_thread_yield();
1871                 return 0;
1872         }
1873         sfd = SLAP_SOCKNEW( s );
1874
1875         /* make sure descriptor number isn't too great */
1876         if ( sfd >= dtblsize ) {
1877                 Debug( LDAP_DEBUG_ANY,
1878                         "daemon: %ld beyond descriptor table size %ld\n",
1879                         (long) sfd, (long) dtblsize, 0 );
1880
1881                 tcp_close(s);
1882                 ldap_pvt_thread_yield();
1883                 return 0;
1884         }
1885         tid = DAEMON_ID(sfd);
1886
1887 #ifdef LDAP_DEBUG
1888         ldap_pvt_thread_mutex_lock( &slap_daemon[tid].sd_mutex );
1889         /* newly accepted stream should not be in any of the FD SETS */
1890         assert( SLAP_SOCK_NOT_ACTIVE( tid, sfd ));
1891         ldap_pvt_thread_mutex_unlock( &slap_daemon[tid].sd_mutex );
1892 #endif /* LDAP_DEBUG */
1893
1894 #if defined( SO_KEEPALIVE ) || defined( TCP_NODELAY )
1895 #ifdef LDAP_PF_LOCAL
1896         /* for IPv4 and IPv6 sockets only */
1897         if ( from.sa_addr.sa_family != AF_LOCAL )
1898 #endif /* LDAP_PF_LOCAL */
1899         {
1900                 int rc;
1901                 int tmp;
1902 #ifdef SO_KEEPALIVE
1903                 /* enable keep alives */
1904                 tmp = 1;
1905                 rc = setsockopt( s, SOL_SOCKET, SO_KEEPALIVE,
1906                         (char *) &tmp, sizeof(tmp) );
1907                 if ( rc == AC_SOCKET_ERROR ) {
1908                         int err = sock_errno();
1909                         Debug( LDAP_DEBUG_ANY,
1910                                 "slapd(%ld): setsockopt(SO_KEEPALIVE) failed "
1911                                 "errno=%d (%s)\n", (long) sfd, err, sock_errstr(err) );
1912                 }
1913 #endif /* SO_KEEPALIVE */
1914 #ifdef TCP_NODELAY
1915                 /* enable no delay */
1916                 tmp = 1;
1917                 rc = setsockopt( s, IPPROTO_TCP, TCP_NODELAY,
1918                         (char *)&tmp, sizeof(tmp) );
1919                 if ( rc == AC_SOCKET_ERROR ) {
1920                         int err = sock_errno();
1921                         Debug( LDAP_DEBUG_ANY,
1922                                 "slapd(%ld): setsockopt(TCP_NODELAY) failed "
1923                                 "errno=%d (%s)\n", (long) sfd, err, sock_errstr(err) );
1924                 }
1925 #endif /* TCP_NODELAY */
1926         }
1927 #endif /* SO_KEEPALIVE || TCP_NODELAY */
1928
1929         Debug( LDAP_DEBUG_CONNS,
1930                 "daemon: listen=%ld, new connection on %ld\n",
1931                 (long) sl->sl_sd, (long) sfd, 0 );
1932
1933         cflag = 0;
1934         switch ( from.sa_addr.sa_family ) {
1935 #  ifdef LDAP_PF_LOCAL
1936         case AF_LOCAL:
1937                 cflag |= CONN_IS_IPC;
1938
1939                 /* FIXME: apparently accept doesn't fill
1940                  * the sun_path sun_path member */
1941                 if ( from.sa_un_addr.sun_path[0] == '\0' ) {
1942                         AC_MEMCPY( from.sa_un_addr.sun_path,
1943                                         sl->sl_sa.sa_un_addr.sun_path,
1944                                         sizeof( from.sa_un_addr.sun_path ) );
1945                 }
1946
1947                 sprintf( peername, "PATH=%s", from.sa_un_addr.sun_path );
1948                 ssf = local_ssf;
1949                 {
1950                         uid_t uid;
1951                         gid_t gid;
1952
1953 #ifdef LDAP_PF_LOCAL_SENDMSG
1954                         peerbv.bv_val = peerbuf;
1955                         peerbv.bv_len = sizeof( peerbuf );
1956 #endif
1957                         if( LUTIL_GETPEEREID( s, &uid, &gid, &peerbv ) == 0 ) {
1958                                 authid.bv_val = ch_malloc(
1959                                         STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
1960                                         "cn=peercred,cn=external,cn=auth" ) + 1 );
1961                                 authid.bv_len = sprintf( authid.bv_val,
1962                                         "gidNumber=%d+uidNumber=%d,"
1963                                         "cn=peercred,cn=external,cn=auth",
1964                                         (int) gid, (int) uid );
1965                                 assert( authid.bv_len <=
1966                                         STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
1967                                         "cn=peercred,cn=external,cn=auth" ) );
1968                         }
1969                 }
1970                 dnsname = "local";
1971                 break;
1972 #endif /* LDAP_PF_LOCAL */
1973
1974 #  ifdef LDAP_PF_INET6
1975         case AF_INET6:
1976         if ( IN6_IS_ADDR_V4MAPPED(&from.sa_in6_addr.sin6_addr) ) {
1977 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
1978                 peeraddr = inet_ntop( AF_INET,
1979                            ((struct in_addr *)&from.sa_in6_addr.sin6_addr.s6_addr[12]),
1980                            addr, sizeof(addr) );
1981 #else /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1982                 peeraddr = inet_ntoa( *((struct in_addr *)
1983                                         &from.sa_in6_addr.sin6_addr.s6_addr[12]) );
1984 #endif /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1985                 if ( !peeraddr ) peeraddr = SLAP_STRING_UNKNOWN;
1986                 sprintf( peername, "IP=%s:%d", peeraddr,
1987                          (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
1988         } else {
1989                 peeraddr = inet_ntop( AF_INET6,
1990                                       &from.sa_in6_addr.sin6_addr,
1991                                       addr, sizeof addr );
1992                 if ( !peeraddr ) peeraddr = SLAP_STRING_UNKNOWN;
1993                 sprintf( peername, "IP=[%s]:%d", peeraddr,
1994                          (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
1995         }
1996         break;
1997 #  endif /* LDAP_PF_INET6 */
1998
1999         case AF_INET: {
2000 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
2001                 peeraddr = inet_ntop( AF_INET, &from.sa_in_addr.sin_addr,
2002                            addr, sizeof(addr) );
2003 #else /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
2004                 peeraddr = inet_ntoa( from.sa_in_addr.sin_addr );
2005 #endif /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
2006                 if ( !peeraddr ) peeraddr = SLAP_STRING_UNKNOWN;
2007                 sprintf( peername, "IP=%s:%d", peeraddr,
2008                         (unsigned) ntohs( from.sa_in_addr.sin_port ) );
2009                 } break;
2010
2011         default:
2012                 slapd_close(sfd);
2013                 return 0;
2014         }
2015
2016         if ( ( from.sa_addr.sa_family == AF_INET )
2017 #ifdef LDAP_PF_INET6
2018                 || ( from.sa_addr.sa_family == AF_INET6 )
2019 #endif /* LDAP_PF_INET6 */
2020                 )
2021         {
2022                 dnsname = NULL;
2023 #ifdef SLAPD_RLOOKUPS
2024                 if ( use_reverse_lookup ) {
2025                         char *herr;
2026                         if (ldap_pvt_get_hname( (const struct sockaddr *)&from, len, hbuf,
2027                                 sizeof(hbuf), &herr ) == 0) {
2028                                 ldap_pvt_str2lower( hbuf );
2029                                 dnsname = hbuf;
2030                         }
2031                 }
2032 #endif /* SLAPD_RLOOKUPS */
2033
2034 #ifdef HAVE_TCPD
2035                 {
2036                         int rc;
2037                         ldap_pvt_thread_mutex_lock( &sd_tcpd_mutex );
2038                         rc = hosts_ctl("slapd",
2039                                 dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
2040                                 peeraddr,
2041                                 SLAP_STRING_UNKNOWN );
2042                         ldap_pvt_thread_mutex_unlock( &sd_tcpd_mutex );
2043                         if ( !rc ) {
2044                                 /* DENY ACCESS */
2045                                 Statslog( LDAP_DEBUG_STATS,
2046                                         "fd=%ld DENIED from %s (%s)\n",
2047                                         (long) sfd,
2048                                         dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
2049                                         peeraddr, 0, 0 );
2050                                 slapd_close(sfd);
2051                                 return 0;
2052                         }
2053                 }
2054 #endif /* HAVE_TCPD */
2055         }
2056
2057 #ifdef HAVE_TLS
2058         if ( sl->sl_is_tls ) cflag |= CONN_IS_TLS;
2059 #endif
2060         c = connection_init(sfd, sl,
2061                 dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
2062                 peername, cflag, ssf,
2063                 authid.bv_val ? &authid : NULL
2064                 LDAP_PF_LOCAL_SENDMSG_ARG(&peerbv));
2065
2066         if( authid.bv_val ) ch_free(authid.bv_val);
2067
2068         if( !c ) {
2069                 Debug( LDAP_DEBUG_ANY,
2070                         "daemon: connection_init(%ld, %s, %s) failed.\n",
2071                         (long) sfd, peername, sl->sl_name.bv_val );
2072                 slapd_close(sfd);
2073                 return 0;
2074         }
2075
2076         Statslog( LDAP_DEBUG_STATS,
2077                 "conn=%ld fd=%ld ACCEPT from %s (%s)\n",
2078                 c->c_connid, (long) sfd, peername, sl->sl_name.bv_val,
2079                 0 );
2080
2081         return 0;
2082 }
2083
2084 static void*
2085 slap_listener_thread(
2086         void* ctx,
2087         void* ptr )
2088 {
2089         int             rc;
2090         Listener        *sl = (Listener *)ptr;
2091
2092         rc = slap_listener( sl );
2093
2094         if( rc != LDAP_SUCCESS ) {
2095                 Debug( LDAP_DEBUG_ANY,
2096                         "slap_listener_thread(%s): failed err=%d",
2097                         sl->sl_url.bv_val, rc, 0 );
2098         }
2099
2100         return (void*)NULL;
2101 }
2102
2103 static int
2104 slap_listener_activate(
2105         Listener* sl )
2106 {
2107         int rc;
2108
2109         Debug( LDAP_DEBUG_TRACE, "slap_listener_activate(%d): %s\n",
2110                 sl->sl_sd, sl->sl_busy ? "busy" : "", 0 );
2111
2112         sl->sl_busy = 1;
2113
2114         rc = ldap_pvt_thread_pool_submit( &connection_pool,
2115                 slap_listener_thread, (void *) sl );
2116
2117         if( rc != 0 ) {
2118                 Debug( LDAP_DEBUG_ANY,
2119                         "slap_listener_activate(%d): submit failed (%d)\n",
2120                         sl->sl_sd, rc, 0 );
2121         }
2122         return rc;
2123 }
2124
2125 static void *
2126 slapd_daemon_task(
2127         void *ptr )
2128 {
2129         int l;
2130         time_t last_idle_check = 0;
2131         int ebadf = 0;
2132         int tid = *(int *)ptr;
2133
2134 #define SLAPD_IDLE_CHECK_LIMIT 4
2135
2136         slapd_add( wake_sds[tid][0], 0, NULL, tid );
2137         if ( tid )
2138                 goto loop;
2139
2140         /* Init stuff done only by thread 0 */
2141
2142         last_idle_check = slap_get_time();
2143
2144         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2145                 if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) continue;
2146
2147 #ifdef LDAP_CONNECTIONLESS
2148                 /* Since this is connectionless, the data port is the
2149                  * listening port. The listen() and accept() calls
2150                  * are unnecessary.
2151                  */
2152                 if ( slap_listeners[l]->sl_is_udp )
2153                         continue;
2154 #endif /* LDAP_CONNECTIONLESS */
2155
2156                 /* FIXME: TCP-only! */
2157 #ifdef LDAP_TCP_BUFFER
2158                 if ( 1 ) {
2159                         int origsize, size, realsize, rc;
2160                         socklen_t optlen;
2161                         char buf[ SLAP_TEXT_BUFLEN ];
2162
2163                         size = 0;
2164                         if ( slap_listeners[l]->sl_tcp_rmem > 0 ) {
2165                                 size = slap_listeners[l]->sl_tcp_rmem;
2166                         } else if ( slapd_tcp_rmem > 0 ) {
2167                                 size = slapd_tcp_rmem;
2168                         }
2169
2170                         if ( size > 0 ) {
2171                                 optlen = sizeof( origsize );
2172                                 rc = getsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
2173                                         SOL_SOCKET,
2174                                         SO_RCVBUF,
2175                                         (void *)&origsize,
2176                                         &optlen );
2177
2178                                 if ( rc ) {
2179                                         int err = sock_errno();
2180                                         Debug( LDAP_DEBUG_ANY,
2181                                                 "slapd_daemon_task: getsockopt(SO_RCVBUF) failed errno=%d (%s)\n",
2182                                                 err, sock_errstr(err), 0 );
2183                                 }
2184
2185                                 optlen = sizeof( size );
2186                                 rc = setsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
2187                                         SOL_SOCKET,
2188                                         SO_RCVBUF,
2189                                         (const void *)&size,
2190                                         optlen );
2191
2192                                 if ( rc ) {
2193                                         int err = sock_errno();
2194                                         Debug( LDAP_DEBUG_ANY,
2195                                                 "slapd_daemon_task: setsockopt(SO_RCVBUF) failed errno=%d (%s)\n",
2196                                                 err, sock_errstr(err), 0 );
2197                                 }
2198
2199                                 optlen = sizeof( realsize );
2200                                 rc = getsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
2201                                         SOL_SOCKET,
2202                                         SO_RCVBUF,
2203                                         (void *)&realsize,
2204                                         &optlen );
2205
2206                                 if ( rc ) {
2207                                         int err = sock_errno();
2208                                         Debug( LDAP_DEBUG_ANY,
2209                                                 "slapd_daemon_task: getsockopt(SO_RCVBUF) failed errno=%d (%s)\n",
2210                                                 err, sock_errstr(err), 0 );
2211                                 }
2212
2213                                 snprintf( buf, sizeof( buf ),
2214                                         "url=%s (#%d) RCVBUF original size=%d requested size=%d real size=%d",
2215                                         slap_listeners[l]->sl_url.bv_val, l, origsize, size, realsize );
2216                                 Debug( LDAP_DEBUG_ANY,
2217                                         "slapd_daemon_task: %s\n",
2218                                         buf, 0, 0 );
2219                         }
2220
2221                         size = 0;
2222                         if ( slap_listeners[l]->sl_tcp_wmem > 0 ) {
2223                                 size = slap_listeners[l]->sl_tcp_wmem;
2224                         } else if ( slapd_tcp_wmem > 0 ) {
2225                                 size = slapd_tcp_wmem;
2226                         }
2227
2228                         if ( size > 0 ) {
2229                                 optlen = sizeof( origsize );
2230                                 rc = getsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
2231                                         SOL_SOCKET,
2232                                         SO_SNDBUF,
2233                                         (void *)&origsize,
2234                                         &optlen );
2235
2236                                 if ( rc ) {
2237                                         int err = sock_errno();
2238                                         Debug( LDAP_DEBUG_ANY,
2239                                                 "slapd_daemon_task: getsockopt(SO_SNDBUF) failed errno=%d (%s)\n",
2240                                                 err, sock_errstr(err), 0 );
2241                                 }
2242
2243                                 optlen = sizeof( size );
2244                                 rc = setsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
2245                                         SOL_SOCKET,
2246                                         SO_SNDBUF,
2247                                         (const void *)&size,
2248                                         optlen );
2249
2250                                 if ( rc ) {
2251                                         int err = sock_errno();
2252                                         Debug( LDAP_DEBUG_ANY,
2253                                                 "slapd_daemon_task: setsockopt(SO_SNDBUF) failed errno=%d (%s)",
2254                                                 err, sock_errstr(err), 0 );
2255                                 }
2256
2257                                 optlen = sizeof( realsize );
2258                                 rc = getsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
2259                                         SOL_SOCKET,
2260                                         SO_SNDBUF,
2261                                         (void *)&realsize,
2262                                         &optlen );
2263
2264                                 if ( rc ) {
2265                                         int err = sock_errno();
2266                                         Debug( LDAP_DEBUG_ANY,
2267                                                 "slapd_daemon_task: getsockopt(SO_SNDBUF) failed errno=%d (%s)\n",
2268                                                 err, sock_errstr(err), 0 );
2269                                 }
2270
2271                                 snprintf( buf, sizeof( buf ),
2272                                         "url=%s (#%d) SNDBUF original size=%d requested size=%d real size=%d",
2273                                         slap_listeners[l]->sl_url.bv_val, l, origsize, size, realsize );
2274                                 Debug( LDAP_DEBUG_ANY,
2275                                         "slapd_daemon_task: %s\n",
2276                                         buf, 0, 0 );
2277                         }
2278                 }
2279 #endif /* LDAP_TCP_BUFFER */
2280
2281                 if ( listen( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ), SLAPD_LISTEN_BACKLOG ) == -1 ) {
2282                         int err = sock_errno();
2283
2284 #ifdef LDAP_PF_INET6
2285                         /* If error is EADDRINUSE, we are trying to listen to INADDR_ANY and
2286                          * we are already listening to in6addr_any, then we want to ignore
2287                          * this and continue.
2288                          */
2289                         if ( err == EADDRINUSE ) {
2290                                 int i;
2291                                 struct sockaddr_in sa = slap_listeners[l]->sl_sa.sa_in_addr;
2292                                 struct sockaddr_in6 sa6;
2293
2294                                 if ( sa.sin_family == AF_INET &&
2295                                      sa.sin_addr.s_addr == htonl(INADDR_ANY) ) {
2296                                         for ( i = 0 ; i < l; i++ ) {
2297                                                 sa6 = slap_listeners[i]->sl_sa.sa_in6_addr;
2298                                                 if ( sa6.sin6_family == AF_INET6 &&
2299                                                      !memcmp( &sa6.sin6_addr, &in6addr_any,
2300                                                                 sizeof(struct in6_addr) ) )
2301                                                 {
2302                                                         break;
2303                                                 }
2304                                         }
2305
2306                                         if ( i < l ) {
2307                                                 /* We are already listening to in6addr_any */
2308                                                 Debug( LDAP_DEBUG_CONNS,
2309                                                         "daemon: Attempt to listen to 0.0.0.0 failed, "
2310                                                         "already listening on ::, assuming IPv4 included\n",
2311                                                         0, 0, 0 );
2312                                                 slapd_close( slap_listeners[l]->sl_sd );
2313                                                 slap_listeners[l]->sl_sd = AC_SOCKET_INVALID;
2314                                                 continue;
2315                                         }
2316                                 }
2317                         }
2318 #endif /* LDAP_PF_INET6 */
2319                         Debug( LDAP_DEBUG_ANY,
2320                                 "daemon: listen(%s, 5) failed errno=%d (%s)\n",
2321                                         slap_listeners[l]->sl_url.bv_val, err,
2322                                         sock_errstr(err) );
2323                         return (void*)-1;
2324                 }
2325
2326                 /* make the listening socket non-blocking */
2327                 if ( ber_pvt_socket_set_nonblock( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ), 1 ) < 0 ) {
2328                         Debug( LDAP_DEBUG_ANY, "slapd_daemon_task: "
2329                                 "set nonblocking on a listening socket failed\n",
2330                                 0, 0, 0 );
2331                         slapd_shutdown = 2;
2332                         return (void*)-1;
2333                 }
2334
2335                 slapd_add( slap_listeners[l]->sl_sd, 0, slap_listeners[l], -1 );
2336         }
2337
2338 #ifdef HAVE_NT_SERVICE_MANAGER
2339         if ( started_event != NULL ) {
2340                 ldap_pvt_thread_cond_signal( &started_event );
2341         }
2342 #endif /* HAVE_NT_SERVICE_MANAGER */
2343
2344 loop:
2345
2346         /* initialization complete. Here comes the loop. */
2347
2348         while ( !slapd_shutdown ) {
2349                 ber_socket_t            i;
2350                 int                     ns, nwriters;
2351                 int                     at;
2352                 ber_socket_t            nfds;
2353 #if SLAP_EVENTS_ARE_INDEXED
2354                 ber_socket_t            nrfds, nwfds;
2355 #endif /* SLAP_EVENTS_ARE_INDEXED */
2356 #define SLAPD_EBADF_LIMIT 16
2357
2358                 time_t                  now;
2359
2360                 SLAP_EVENT_DECL;
2361
2362                 struct timeval          tv;
2363                 struct timeval          *tvp;
2364
2365                 struct timeval          cat;
2366                 time_t                  tdelta = 1;
2367                 struct re_s*            rtask;
2368
2369                 now = slap_get_time();
2370
2371                 if ( !tid && ( global_idletimeout > 0 || chk_writetime )) {
2372                         int check = 0;
2373                         /* Set the select timeout.
2374                          * Don't just truncate, preserve the fractions of
2375                          * seconds to prevent sleeping for zero time.
2376                          */
2377                         if ( chk_writetime ) {
2378                                 tv.tv_sec = global_writetimeout;
2379                                 tv.tv_usec = 0;
2380                                 if ( difftime( chk_writetime, now ) < 0 )
2381                                         check = 2;
2382                         } else {
2383                                 tv.tv_sec = global_idletimeout / SLAPD_IDLE_CHECK_LIMIT;
2384                                 tv.tv_usec = global_idletimeout - \
2385                                         ( tv.tv_sec * SLAPD_IDLE_CHECK_LIMIT );
2386                                 tv.tv_usec *= 1000000 / SLAPD_IDLE_CHECK_LIMIT;
2387                                 if ( difftime( last_idle_check +
2388                                         global_idletimeout/SLAPD_IDLE_CHECK_LIMIT, now ) < 0 )
2389                                         check = 1;
2390                         }
2391                         if ( check ) {
2392                                 connections_timeout_idle( now );
2393                                 last_idle_check = now;
2394                         }
2395                 } else {
2396                         tv.tv_sec = 0;
2397                         tv.tv_usec = 0;
2398                 }
2399
2400 #ifdef SIGHUP
2401                 if ( slapd_gentle_shutdown ) {
2402                         ber_socket_t active;
2403
2404                         if ( !tid && slapd_gentle_shutdown == 1 ) {
2405                                 BackendDB *be;
2406                                 Debug( LDAP_DEBUG_ANY, "slapd gentle shutdown\n", 0, 0, 0 );
2407                                 close_listeners( 1 );
2408                                 frontendDB->be_restrictops |= SLAP_RESTRICT_OP_WRITES;
2409                                 LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
2410                                         be->be_restrictops |= SLAP_RESTRICT_OP_WRITES;
2411                                 }
2412                                 slapd_gentle_shutdown = 2;
2413                         }
2414
2415                         ldap_pvt_thread_mutex_lock( &slap_daemon[tid].sd_mutex );
2416                         active = slap_daemon[tid].sd_nactives;
2417                         ldap_pvt_thread_mutex_unlock( &slap_daemon[tid].sd_mutex );
2418
2419                         if ( active == 0 ) {
2420                                 if ( !tid ) {
2421                                         for ( l=1; l<slapd_daemon_threads; l++ ) {
2422                                                 ldap_pvt_thread_mutex_lock( &slap_daemon[l].sd_mutex );
2423                                                 active += slap_daemon[l].sd_nactives;
2424                                                 ldap_pvt_thread_mutex_unlock( &slap_daemon[l].sd_mutex );
2425                                         }
2426                                         if ( !active )
2427                                                 slapd_shutdown = 1;
2428                                 }
2429                                 if ( !active )
2430                                         break;
2431                         }
2432                 }
2433 #endif /* SIGHUP */
2434                 at = 0;
2435
2436                 ldap_pvt_thread_mutex_lock( &slap_daemon[tid].sd_mutex );
2437
2438                 nwriters = slap_daemon[tid].sd_nwriters;
2439
2440                 if ( listening )
2441                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2442                         Listener *lr = slap_listeners[l];
2443
2444                         if ( lr->sl_sd == AC_SOCKET_INVALID ) continue;
2445                         if ( DAEMON_ID( lr->sl_sd ) != tid ) continue;
2446
2447                         if ( lr->sl_mute || lr->sl_busy )
2448                         {
2449                                 SLAP_SOCK_CLR_READ( tid, lr->sl_sd );
2450                         } else {
2451                                 SLAP_SOCK_SET_READ( tid, lr->sl_sd );
2452                         }
2453                 }
2454
2455                 SLAP_EVENT_INIT(tid);
2456
2457                 nfds = SLAP_EVENT_MAX(tid);
2458
2459                 if (( chk_writetime || global_idletimeout ) && slap_daemon[tid].sd_nactives ) at = 1;
2460
2461                 ldap_pvt_thread_mutex_unlock( &slap_daemon[tid].sd_mutex );
2462
2463                 if ( at
2464 #if defined(HAVE_YIELDING_SELECT) || defined(NO_THREADS)
2465                         &&  ( tv.tv_sec || tv.tv_usec )
2466 #endif /* HAVE_YIELDING_SELECT || NO_THREADS */
2467                         )
2468                 {
2469                         tvp = &tv;
2470                 } else {
2471                         tvp = NULL;
2472                 }
2473
2474                 /* Only thread 0 handles runqueue */
2475                 if ( !tid ) {
2476                         ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
2477                         rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
2478                         while ( rtask && cat.tv_sec && cat.tv_sec <= now ) {
2479                                 if ( ldap_pvt_runqueue_isrunning( &slapd_rq, rtask )) {
2480                                         ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
2481                                 } else {
2482                                         ldap_pvt_runqueue_runtask( &slapd_rq, rtask );
2483                                         ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
2484                                         ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
2485                                         ldap_pvt_thread_pool_submit( &connection_pool,
2486                                                 rtask->routine, (void *) rtask );
2487                                         ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
2488                                 }
2489                                 rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
2490                         }
2491                         ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
2492
2493                         if ( rtask && cat.tv_sec ) {
2494                                 /* NOTE: diff __should__ always be >= 0,
2495                                  * AFAI understand; however (ITS#4872),
2496                                  * time_t might be unsigned in some systems,
2497                                  * while difftime() returns a double */
2498                                 double diff = difftime( cat.tv_sec, now );
2499                                 if ( diff <= 0 ) {
2500                                         diff = tdelta;
2501                                 }
2502                                 if ( tvp == NULL || diff < tv.tv_sec ) {
2503                                         tv.tv_sec = diff;
2504                                         tv.tv_usec = 0;
2505                                         tvp = &tv;
2506                                 }
2507                         }
2508                 }
2509
2510                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2511                         Listener *lr = slap_listeners[l];
2512
2513                         if ( lr->sl_sd == AC_SOCKET_INVALID ) {
2514                                 continue;
2515                         }
2516
2517                         if ( lr->sl_mute ) {
2518                                 Debug( LDAP_DEBUG_CONNS,
2519                                         "daemon: " SLAP_EVENT_FNAME ": "
2520                                         "listen=%d muted\n",
2521                                         lr->sl_sd, 0, 0 );
2522                                 continue;
2523                         }
2524
2525                         if ( lr->sl_busy ) {
2526                                 Debug( LDAP_DEBUG_CONNS,
2527                                         "daemon: " SLAP_EVENT_FNAME ": "
2528                                         "listen=%d busy\n",
2529                                         lr->sl_sd, 0, 0 );
2530                                 continue;
2531                         }
2532
2533                         Debug( LDAP_DEBUG_CONNS,
2534                                 "daemon: " SLAP_EVENT_FNAME ": "
2535                                 "listen=%d active_threads=%d tvp=%s\n",
2536                                 lr->sl_sd, at, tvp == NULL ? "NULL" : "zero" );
2537                 }
2538
2539                 SLAP_EVENT_WAIT( tid, tvp, &ns );
2540                 switch ( ns ) {
2541                 case -1: {      /* failure - try again */
2542                                 int err = sock_errno();
2543
2544                                 if ( err != EINTR ) {
2545                                         ebadf++;
2546
2547                                         /* Don't log unless we got it twice in a row */
2548                                         if ( !( ebadf & 1 ) ) {
2549                                                 Debug( LDAP_DEBUG_ANY,
2550                                                         "daemon: "
2551                                                         SLAP_EVENT_FNAME
2552                                                         " failed count %d "
2553                                                         "err (%d): %s\n",
2554                                                         ebadf, err,
2555                                                         sock_errstr( err ) );
2556                                         }
2557                                         if ( ebadf >= SLAPD_EBADF_LIMIT ) {
2558                                                 slapd_shutdown = 2;
2559                                         }
2560                                 }
2561                         }
2562                         continue;
2563
2564                 case 0:         /* timeout - let threads run */
2565                         ebadf = 0;
2566 #ifndef HAVE_YIELDING_SELECT
2567                         Debug( LDAP_DEBUG_CONNS, "daemon: " SLAP_EVENT_FNAME
2568                                 "timeout - yielding\n",
2569                                 0, 0, 0 );
2570
2571                         ldap_pvt_thread_yield();
2572 #endif /* ! HAVE_YIELDING_SELECT */
2573                         continue;
2574
2575                 default:        /* something happened - deal with it */
2576                         if ( slapd_shutdown ) continue;
2577
2578                         ebadf = 0;
2579                         Debug( LDAP_DEBUG_CONNS,
2580                                 "daemon: activity on %d descriptor%s\n",
2581                                 ns, ns != 1 ? "s" : "", 0 );
2582                         /* FALL THRU */
2583                 }
2584
2585 #if SLAP_EVENTS_ARE_INDEXED
2586                 if ( SLAP_EVENT_IS_READ( wake_sds[tid][0] ) ) {
2587                         char c[BUFSIZ];
2588                         SLAP_EVENT_CLR_READ( wake_sds[tid][0] );
2589                         waking = 0;
2590                         tcp_read( SLAP_FD2SOCK(wake_sds[tid][0]), c, sizeof(c) );
2591                         Debug( LDAP_DEBUG_CONNS, "daemon: waked\n", 0, 0, 0 );
2592                         continue;
2593                 }
2594
2595                 /* The event slot equals the descriptor number - this is
2596                  * true for Unix select and poll. We treat Windows select
2597                  * like this too, even though it's a kludge.
2598                  */
2599                 if ( listening )
2600                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2601                         int rc;
2602
2603                         if ( ns <= 0 ) break;
2604                         if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) continue;
2605 #ifdef LDAP_CONNECTIONLESS
2606                         if ( slap_listeners[l]->sl_is_udp ) continue;
2607 #endif /* LDAP_CONNECTIONLESS */
2608                         if ( !SLAP_EVENT_IS_READ( slap_listeners[l]->sl_sd ) ) continue;
2609
2610                         /* clear events */
2611                         SLAP_EVENT_CLR_READ( slap_listeners[l]->sl_sd );
2612                         SLAP_EVENT_CLR_WRITE( slap_listeners[l]->sl_sd );
2613                         ns--;
2614
2615                         rc = slap_listener_activate( slap_listeners[l] );
2616                 }
2617
2618                 /* bypass the following tests if no descriptors left */
2619                 if ( ns <= 0 ) {
2620 #ifndef HAVE_YIELDING_SELECT
2621                         ldap_pvt_thread_yield();
2622 #endif /* HAVE_YIELDING_SELECT */
2623                         continue;
2624                 }
2625
2626                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
2627                 nrfds = 0;
2628                 nwfds = 0;
2629                 for ( i = 0; i < nfds; i++ ) {
2630                         int     r, w;
2631
2632                         r = SLAP_EVENT_IS_READ( i );
2633                         /* writefds was not initialized if nwriters was zero */
2634                         w = nwriters ? SLAP_EVENT_IS_WRITE( i ) : 0;
2635                         if ( r || w ) {
2636                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", i,
2637                                     r ? "r" : "", w ? "w" : "" );
2638                                 if ( r ) {
2639                                         nrfds++;
2640                                         ns--;
2641                                 }
2642                                 if ( w ) {
2643                                         nwfds++;
2644                                         ns--;
2645                                 }
2646                         }
2647                         if ( ns <= 0 ) break;
2648                 }
2649                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
2650
2651                 /* loop through the writers */
2652                 for ( i = 0; nwfds > 0; i++ ) {
2653                         ber_socket_t wd;
2654                         if ( ! SLAP_EVENT_IS_WRITE( i ) ) continue;
2655                         wd = i;
2656
2657                         SLAP_EVENT_CLR_WRITE( wd );
2658                         nwfds--;
2659
2660                         Debug( LDAP_DEBUG_CONNS,
2661                                 "daemon: write active on %d\n",
2662                                 wd, 0, 0 );
2663
2664                         /*
2665                          * NOTE: it is possible that the connection was closed
2666                          * and that the stream is now inactive.
2667                          * connection_write() must validate the stream is still
2668                          * active.
2669                          *
2670                          * ITS#4338: if the stream is invalid, there is no need to
2671                          * close it here. It has already been closed in connection.c.
2672                          */
2673                         if ( connection_write( wd ) < 0 ) {
2674                                 if ( SLAP_EVENT_IS_READ( wd ) ) {
2675                                         SLAP_EVENT_CLR_READ( (unsigned) wd );
2676                                         nrfds--;
2677                                 }
2678                         }
2679                 }
2680
2681                 for ( i = 0; nrfds > 0; i++ ) {
2682                         ber_socket_t rd;
2683                         if ( ! SLAP_EVENT_IS_READ( i ) ) continue;
2684                         rd = i;
2685                         SLAP_EVENT_CLR_READ( rd );
2686                         nrfds--;
2687
2688                         Debug ( LDAP_DEBUG_CONNS,
2689                                 "daemon: read activity on %d\n", rd, 0, 0 );
2690                         /*
2691                          * NOTE: it is possible that the connection was closed
2692                          * and that the stream is now inactive.
2693                          * connection_read() must valid the stream is still
2694                          * active.
2695                          */
2696
2697                         connection_read_activate( rd );
2698                 }
2699 #else   /* !SLAP_EVENTS_ARE_INDEXED */
2700         /* FIXME */
2701         /* The events are returned in an arbitrary list. This is true
2702          * for /dev/poll, epoll and kqueue. In order to prioritize things
2703          * so that we can handle wake_sds first, listeners second, and then
2704          * all other connections last (as we do for select), we would need
2705          * to use multiple event handles and cascade them.
2706          *
2707          * That seems like a bit of hassle. So the wake_sds check has been
2708          * skipped. For epoll and kqueue we can associate arbitrary data with
2709          * an event, so we could use pointers to the listener structure
2710          * instead of just the file descriptor. For /dev/poll we have to
2711          * search the listeners array for a matching descriptor.
2712          *
2713          * We now handle wake events when we see them; they are not given
2714          * higher priority.
2715          */
2716 #ifdef LDAP_DEBUG
2717                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
2718
2719                 for ( i = 0; i < ns; i++ ) {
2720                         int     r, w, fd;
2721
2722                         /* Don't log listener events */
2723                         if ( SLAP_EVENT_IS_LISTENER( tid, i )
2724 #ifdef LDAP_CONNECTIONLESS
2725                                 && !( (SLAP_EVENT_LISTENER( tid, i ))->sl_is_udp )
2726 #endif /* LDAP_CONNECTIONLESS */
2727                                 )
2728                         {
2729                                 continue;
2730                         }
2731
2732                         fd = SLAP_EVENT_FD( tid, i );
2733                         /* Don't log internal wake events */
2734                         if ( fd == wake_sds[tid][0] ) continue;
2735
2736                         r = SLAP_EVENT_IS_READ( i );
2737                         w = SLAP_EVENT_IS_WRITE( i );
2738                         if ( r || w ) {
2739                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", fd,
2740                                     r ? "r" : "", w ? "w" : "" );
2741                         }
2742                 }
2743                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
2744 #endif /* LDAP_DEBUG */
2745
2746                 for ( i = 0; i < ns; i++ ) {
2747                         int rc = 1, fd, w = 0, r = 0;
2748
2749                         if ( SLAP_EVENT_IS_LISTENER( tid, i ) ) {
2750                                 rc = slap_listener_activate( SLAP_EVENT_LISTENER( tid, i ) );
2751                         }
2752
2753                         /* If we found a regular listener, rc is now zero, and we
2754                          * can skip the data portion. But if it was a UDP listener
2755                          * then rc is still 1, and we want to handle the data.
2756                          */
2757                         if ( rc ) {
2758                                 fd = SLAP_EVENT_FD( tid, i );
2759
2760                                 /* Handle wake events */
2761                                 if ( fd == wake_sds[tid][0] ) {
2762                                         char c[BUFSIZ];
2763                                         waking = 0;
2764                                         tcp_read( SLAP_FD2SOCK(wake_sds[tid][0]), c, sizeof(c) );
2765                                         continue;
2766                                 }
2767
2768                                 if ( SLAP_EVENT_IS_WRITE( i ) ) {
2769                                         Debug( LDAP_DEBUG_CONNS,
2770                                                 "daemon: write active on %d\n",
2771                                                 fd, 0, 0 );
2772
2773                                         SLAP_EVENT_CLR_WRITE( i );
2774                                         w = 1;
2775
2776                                         /*
2777                                          * NOTE: it is possible that the connection was closed
2778                                          * and that the stream is now inactive.
2779                                          * connection_write() must valid the stream is still
2780                                          * active.
2781                                          */
2782                                         if ( connection_write( fd ) < 0 ) {
2783                                                 continue;
2784                                         }
2785                                 }
2786                                 /* If event is a read */
2787                                 if ( SLAP_EVENT_IS_READ( i ))
2788                                         r = 1;
2789                                 if ( r || !w ) {
2790                                         Debug( LDAP_DEBUG_CONNS,
2791                                                 "daemon: read active on %d\n",
2792                                                 fd, 0, 0 );
2793
2794                                         if ( r ) {
2795                                                 SLAP_EVENT_CLR_READ( i );
2796                                         } else {
2797 #ifdef HAVE_EPOLL
2798                                                 /* Don't keep reporting the hangup
2799                                                  */
2800                                                 if ( SLAP_SOCK_IS_ACTIVE( tid, fd )) {
2801                                                         SLAP_EPOLL_SOCK_SET( tid, fd, EPOLLET );
2802                                                 }
2803 #endif
2804                                         }
2805                                         connection_read_activate( fd );
2806                                 }
2807                         }
2808                 }
2809 #endif  /* SLAP_EVENTS_ARE_INDEXED */
2810
2811 #ifndef HAVE_YIELDING_SELECT
2812                 ldap_pvt_thread_yield();
2813 #endif /* ! HAVE_YIELDING_SELECT */
2814         }
2815
2816         /* Only thread 0 handles shutdown */
2817         if ( tid )
2818                 return NULL;
2819
2820         if ( slapd_shutdown == 1 ) {
2821                 Debug( LDAP_DEBUG_ANY,
2822                         "daemon: shutdown requested and initiated.\n",
2823                         0, 0, 0 );
2824
2825         } else if ( slapd_shutdown == 2 ) {
2826 #ifdef HAVE_NT_SERVICE_MANAGER
2827                         Debug( LDAP_DEBUG_ANY,
2828                                "daemon: shutdown initiated by Service Manager.\n",
2829                                0, 0, 0);
2830 #else /* !HAVE_NT_SERVICE_MANAGER */
2831                         Debug( LDAP_DEBUG_ANY,
2832                                "daemon: abnormal condition, shutdown initiated.\n",
2833                                0, 0, 0 );
2834 #endif /* !HAVE_NT_SERVICE_MANAGER */
2835         } else {
2836                 Debug( LDAP_DEBUG_ANY,
2837                        "daemon: no active streams, shutdown initiated.\n",
2838                        0, 0, 0 );
2839         }
2840
2841         close_listeners( 0 );
2842
2843         if ( !slapd_gentle_shutdown ) {
2844                 slapd_abrupt_shutdown = 1;
2845                 connections_shutdown();
2846         }
2847
2848         if ( LogTest( LDAP_DEBUG_ANY )) {
2849                 int t = ldap_pvt_thread_pool_backload( &connection_pool );
2850                 Debug( LDAP_DEBUG_ANY,
2851                         "slapd shutdown: waiting for %d operations/tasks to finish\n",
2852                         t, 0, 0 );
2853         }
2854         ldap_pvt_thread_pool_destroy( &connection_pool, 1 );
2855
2856         return NULL;
2857 }
2858
2859
2860 #ifdef LDAP_CONNECTIONLESS
2861 static int
2862 connectionless_init( void )
2863 {
2864         int l;
2865
2866         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2867                 Listener *lr = slap_listeners[l];
2868                 Connection *c;
2869
2870                 if ( !lr->sl_is_udp ) {
2871                         continue;
2872                 }
2873
2874                 c = connection_init( lr->sl_sd, lr, "", "",
2875                         CONN_IS_UDP, (slap_ssf_t) 0, NULL
2876                         LDAP_PF_LOCAL_SENDMSG_ARG(NULL));
2877
2878                 if ( !c ) {
2879                         Debug( LDAP_DEBUG_TRACE,
2880                                 "connectionless_init: failed on %s (%d)\n",
2881                                 lr->sl_url.bv_val, lr->sl_sd, 0 );
2882                         return -1;
2883                 }
2884                 lr->sl_is_udp++;
2885         }
2886
2887         return 0;
2888 }
2889 #endif /* LDAP_CONNECTIONLESS */
2890
2891 int
2892 slapd_daemon( void )
2893 {
2894         int i, rc;
2895         ldap_pvt_thread_t       *listener_tid;
2896
2897 #ifdef LDAP_CONNECTIONLESS
2898         connectionless_init();
2899 #endif /* LDAP_CONNECTIONLESS */
2900
2901         listener_tid = ch_malloc(slapd_daemon_threads * sizeof(ldap_pvt_thread_t));
2902
2903         /* daemon_init only inits element 0 */
2904         for ( i=1; i<slapd_daemon_threads; i++ )
2905         {
2906                 ldap_pvt_thread_mutex_init( &slap_daemon[i].sd_mutex );
2907
2908                 if( (rc = lutil_pair( wake_sds[i] )) < 0 ) {
2909                         Debug( LDAP_DEBUG_ANY,
2910                                 "daemon: lutil_pair() failed rc=%d\n", rc, 0, 0 );
2911                         return rc;
2912                 }
2913                 ber_pvt_socket_set_nonblock( wake_sds[i][1], 1 );
2914
2915                 SLAP_SOCK_INIT(i);
2916         }
2917
2918         for ( i=0; i<slapd_daemon_threads; i++ )
2919         {
2920                 /* listener as a separate THREAD */
2921                 rc = ldap_pvt_thread_create( &listener_tid[i],
2922                         0, slapd_daemon_task, (void *)&i );
2923
2924                 if ( rc != 0 ) {
2925                         Debug( LDAP_DEBUG_ANY,
2926                         "listener ldap_pvt_thread_create failed (%d)\n", rc, 0, 0 );
2927                         return rc;
2928                 }
2929         }
2930
2931         /* wait for the listener threads to complete */
2932         for ( i=0; i<slapd_daemon_threads; i++ )
2933                 ldap_pvt_thread_join( listener_tid[i], (void *)NULL );
2934
2935         destroy_listeners();
2936         ch_free( listener_tid );
2937
2938         return 0;
2939 }
2940
2941 static int
2942 sockinit( void )
2943 {
2944 #if defined( HAVE_WINSOCK2 )
2945         WORD wVersionRequested;
2946         WSADATA wsaData;
2947         int err;
2948
2949         wVersionRequested = MAKEWORD( 2, 0 );
2950
2951         err = WSAStartup( wVersionRequested, &wsaData );
2952         if ( err != 0 ) {
2953                 /* Tell the user that we couldn't find a usable */
2954                 /* WinSock DLL.                                  */
2955                 return -1;
2956         }
2957
2958         /* Confirm that the WinSock DLL supports 2.0.*/
2959         /* Note that if the DLL supports versions greater    */
2960         /* than 2.0 in addition to 2.0, it will still return */
2961         /* 2.0 in wVersion since that is the version we      */
2962         /* requested.                                        */
2963
2964         if ( LOBYTE( wsaData.wVersion ) != 2 ||
2965                 HIBYTE( wsaData.wVersion ) != 0 )
2966         {
2967             /* Tell the user that we couldn't find a usable */
2968             /* WinSock DLL.                                  */
2969             WSACleanup();
2970             return -1;
2971         }
2972
2973         /* The WinSock DLL is acceptable. Proceed. */
2974 #elif defined( HAVE_WINSOCK )
2975         WSADATA wsaData;
2976         if ( WSAStartup( 0x0101, &wsaData ) != 0 ) return -1;
2977 #endif /* ! HAVE_WINSOCK2 && ! HAVE_WINSOCK */
2978
2979         return 0;
2980 }
2981
2982 static int
2983 sockdestroy( void )
2984 {
2985 #if defined( HAVE_WINSOCK2 ) || defined( HAVE_WINSOCK )
2986         WSACleanup();
2987 #endif /* HAVE_WINSOCK2 || HAVE_WINSOCK */
2988
2989         return 0;
2990 }
2991
2992 RETSIGTYPE
2993 slap_sig_shutdown( int sig )
2994 {
2995         int save_errno = errno;
2996         int i;
2997
2998 #if 0
2999         Debug(LDAP_DEBUG_TRACE, "slap_sig_shutdown: signal %d\n", sig, 0, 0);
3000 #endif
3001
3002         /*
3003          * If the NT Service Manager is controlling the server, we don't
3004          * want SIGBREAK to kill the server. For some strange reason,
3005          * SIGBREAK is generated when a user logs out.
3006          */
3007
3008 #if defined(HAVE_NT_SERVICE_MANAGER) && defined(SIGBREAK)
3009         if (is_NT_Service && sig == SIGBREAK) {
3010                 /* empty */;
3011         } else
3012 #endif /* HAVE_NT_SERVICE_MANAGER && SIGBREAK */
3013 #ifdef SIGHUP
3014         if (sig == SIGHUP && global_gentlehup && slapd_gentle_shutdown == 0) {
3015                 slapd_gentle_shutdown = 1;
3016         } else
3017 #endif /* SIGHUP */
3018         {
3019                 slapd_shutdown = 1;
3020         }
3021
3022         for (i=0; i<slapd_daemon_threads; i++) {
3023                 WAKE_LISTENER(i,1);
3024         }
3025
3026         /* reinstall self */
3027         (void) SIGNAL_REINSTALL( sig, slap_sig_shutdown );
3028
3029         errno = save_errno;
3030 }
3031
3032 RETSIGTYPE
3033 slap_sig_wake( int sig )
3034 {
3035         int save_errno = errno;
3036
3037         WAKE_LISTENER(0,1);
3038
3039         /* reinstall self */
3040         (void) SIGNAL_REINSTALL( sig, slap_sig_wake );
3041
3042         errno = save_errno;
3043 }
3044
3045
3046 void
3047 slapd_add_internal( ber_socket_t s, int isactive )
3048 {
3049         slapd_add( s, isactive, NULL, -1 );
3050 }
3051
3052 Listener **
3053 slapd_get_listeners( void )
3054 {
3055         /* Could return array with no listeners if !listening, but current
3056          * callers mostly look at the URLs.  E.g. syncrepl uses this to
3057          * identify the server, which means it wants the startup arguments.
3058          */
3059         return slap_listeners;
3060 }
3061
3062 /* Reject all incoming requests */
3063 void
3064 slap_suspend_listeners( void )
3065 {
3066         int i;
3067         for (i=0; slap_listeners[i]; i++) {
3068                 slap_listeners[i]->sl_mute = 1;
3069                 listen( slap_listeners[i]->sl_sd, 0 );
3070         }
3071 }
3072
3073 /* Resume after a suspend */
3074 void
3075 slap_resume_listeners( void )
3076 {
3077         int i;
3078         for (i=0; slap_listeners[i]; i++) {
3079                 slap_listeners[i]->sl_mute = 0;
3080                 listen( slap_listeners[i]->sl_sd, SLAPD_LISTEN_BACKLOG );
3081         }
3082 }
3083
3084 void
3085 slap_wake_listener()
3086 {
3087         WAKE_LISTENER(0,1);
3088 }