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 1998-2017 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 #ifdef HAVE_POLL
  45 #include <poll.h>
  46 #endif
  47
  48 #if defined(HAVE_SYS_EPOLL_H) && defined(HAVE_EPOLL)
  49 # include <sys/epoll.h>
  50 #elif defined(SLAP_X_DEVPOLL) && defined(HAVE_SYS_DEVPOLL_H) && defined(HAVE_DEVPOLL)
  51 # include <sys/types.h>
  52 # include <sys/stat.h>
  53 # include <fcntl.h>
  54 # include <sys/devpoll.h>
  55 #endif /* ! epoll && ! /dev/poll */
  56
  57 #ifdef HAVE_TCPD
  58 int allow_severity = LOG_INFO;
  59 int deny_severity = LOG_NOTICE;
  60 #endif /* TCP Wrappers */
  61
  62 #ifdef LDAP_PF_LOCAL
  63 # include <sys/stat.h>
  64 /* this should go in <ldap.h> as soon as it is accepted */
  65 # define LDAPI_MOD_URLEXT               "x-mod"
  66 #endif /* LDAP_PF_LOCAL */
  67
  68 #ifdef LDAP_PF_INET6
  69 int slap_inet4or6 = AF_UNSPEC;
  70 #else /* ! INETv6 */
  71 int slap_inet4or6 = AF_INET;
  72 #endif /* ! INETv6 */
  73
  74 /* globals */
  75 time_t starttime;
  76 ber_socket_t dtblsize;
  77 slap_ssf_t local_ssf = LDAP_PVT_SASL_LOCAL_SSF;
  78 struct runqueue_s slapd_rq;
  79
  80 #ifndef SLAPD_MAX_DAEMON_THREADS
  81 #define SLAPD_MAX_DAEMON_THREADS        16
  82 #endif
  83 int slapd_daemon_threads = 1;
  84 int slapd_daemon_mask;
  85
  86 #ifdef LDAP_TCP_BUFFER
  87 int slapd_tcp_rmem;
  88 int slapd_tcp_wmem;
  89 #endif /* LDAP_TCP_BUFFER */
  90
  91 Listener **slap_listeners = NULL;
  92 static volatile sig_atomic_t listening = 1; /* 0 when slap_listeners closed */
  93 static ldap_pvt_thread_t *listener_tid;
  94
  95 #ifndef SLAPD_LISTEN_BACKLOG
  96 #define SLAPD_LISTEN_BACKLOG 1024
  97 #endif /* ! SLAPD_LISTEN_BACKLOG */
  98
  99 #define DAEMON_ID(fd)   (fd & slapd_daemon_mask)
 100
 101 static ber_socket_t wake_sds[SLAPD_MAX_DAEMON_THREADS][2];
 102 static int emfile;
 103
 104 static volatile int waking;
 105 #ifdef NO_THREADS
 106 #define WAKE_LISTENER(l,w)      do { \
 107         if ((w) && ++waking < 5) { \
 108                 tcp_write( SLAP_FD2SOCK(wake_sds[l][1]), "0", 1 ); \
 109         } \
 110 } while (0)
 111 #else /* ! NO_THREADS */
 112 #define WAKE_LISTENER(l,w)      do { \
 113         if (w) { \
 114                 tcp_write( SLAP_FD2SOCK(wake_sds[l][1]), "0", 1 ); \
 115         } \
 116 } while (0)
 117 #endif /* ! NO_THREADS */
 118
 119 volatile sig_atomic_t slapd_shutdown = 0;
 120 volatile sig_atomic_t slapd_gentle_shutdown = 0;
 121 volatile sig_atomic_t slapd_abrupt_shutdown = 0;
 122
 123 #ifdef HAVE_WINSOCK
 124 ldap_pvt_thread_mutex_t slapd_ws_mutex;
 125 SOCKET *slapd_ws_sockets;
 126 #define SD_READ 1
 127 #define SD_WRITE        2
 128 #define SD_ACTIVE       4
 129 #define SD_LISTENER     8
 130 #endif
 131
 132 #ifdef HAVE_TCPD
 133 static ldap_pvt_thread_mutex_t  sd_tcpd_mutex;
 134 #endif /* TCP Wrappers */
 135
 136 typedef struct slap_daemon_st {
 137         ldap_pvt_thread_mutex_t sd_mutex;
 138
 139         ber_socket_t            sd_nactives;
 140         int                     sd_nwriters;
 141         int                     sd_nfds;
 142
 143 #if defined(HAVE_EPOLL)
 144         struct epoll_event      *sd_epolls;
 145         int                     *sd_index;
 146         int                     sd_epfd;
 147 #elif defined(SLAP_X_DEVPOLL) && defined(HAVE_DEVPOLL)
 148         /* eXperimental */
 149         struct pollfd           *sd_pollfd;
 150         int                     *sd_index;
 151         Listener                **sd_l;
 152         int                     sd_dpfd;
 153 #else /* ! epoll && ! /dev/poll */
 154 #ifdef HAVE_WINSOCK
 155         char    *sd_flags;
 156         char    *sd_rflags;
 157 #else /* ! HAVE_WINSOCK */
 158         fd_set                  sd_actives;
 159         fd_set                  sd_readers;
 160         fd_set                  sd_writers;
 161 #endif /* ! HAVE_WINSOCK */
 162 #endif /* ! epoll && ! /dev/poll */
 163 } slap_daemon_st;
 164
 165 static slap_daemon_st slap_daemon[SLAPD_MAX_DAEMON_THREADS];
 166
 167 /*
 168  * NOTE: naming convention for macros:
 169  *
 170  * - SLAP_SOCK_* and SLAP_EVENT_* for public interface that deals
 171  *   with file descriptors and events respectively
 172  *
 173  * - SLAP_<type>_* for private interface; type by now is one of
 174  *   EPOLL, DEVPOLL, SELECT
 175  *
 176  * private interface should not be used in the code.
 177  */
 178 #if defined(HAVE_EPOLL)
 179 /***************************************
 180  * Use epoll infrastructure - epoll(4) *
 181  ***************************************/
 182 # define SLAP_EVENT_FNAME               "epoll"
 183 # define SLAP_EVENTS_ARE_INDEXED        0
 184 # define SLAP_EPOLL_SOCK_IX(t,s)                (slap_daemon[t].sd_index[(s)])
 185 # define SLAP_EPOLL_SOCK_EP(t,s)                (slap_daemon[t].sd_epolls[SLAP_EPOLL_SOCK_IX(t,s)])
 186 # define SLAP_EPOLL_SOCK_EV(t,s)                (SLAP_EPOLL_SOCK_EP(t,s).events)
 187 # define SLAP_SOCK_IS_ACTIVE(t,s)               (SLAP_EPOLL_SOCK_IX(t,s) != -1)
 188 # define SLAP_SOCK_NOT_ACTIVE(t,s)      (SLAP_EPOLL_SOCK_IX(t,s) == -1)
 189 # define SLAP_EPOLL_SOCK_IS_SET(t,s, mode)      (SLAP_EPOLL_SOCK_EV(t,s) & (mode))
 190
 191 # define SLAP_SOCK_IS_READ(t,s)         SLAP_EPOLL_SOCK_IS_SET(t,(s), EPOLLIN)
 192 # define SLAP_SOCK_IS_WRITE(t,s)                SLAP_EPOLL_SOCK_IS_SET(t,(s), EPOLLOUT)
 193
 194 # define SLAP_EPOLL_SOCK_SET(t,s, mode) do { \
 195         if ( (SLAP_EPOLL_SOCK_EV(t,s) & (mode)) != (mode) ) {   \
 196                 SLAP_EPOLL_SOCK_EV(t,s) |= (mode); \
 197                 epoll_ctl( slap_daemon[t].sd_epfd, EPOLL_CTL_MOD, (s), \
 198                         &SLAP_EPOLL_SOCK_EP(t,s) ); \
 199         } \
 200 } while (0)
 201
 202 # define SLAP_EPOLL_SOCK_CLR(t,s, mode) do { \
 203         if ( (SLAP_EPOLL_SOCK_EV(t,s) & (mode)) ) { \
 204                 SLAP_EPOLL_SOCK_EV(t,s) &= ~(mode);     \
 205                 epoll_ctl( slap_daemon[t].sd_epfd, EPOLL_CTL_MOD, s, \
 206                         &SLAP_EPOLL_SOCK_EP(t,s) ); \
 207         } \
 208 } while (0)
 209
 210 # define SLAP_SOCK_SET_READ(t,s)                SLAP_EPOLL_SOCK_SET(t,s, EPOLLIN)
 211 # define SLAP_SOCK_SET_WRITE(t,s)               SLAP_EPOLL_SOCK_SET(t,s, EPOLLOUT)
 212
 213 # define SLAP_SOCK_CLR_READ(t,s)                SLAP_EPOLL_SOCK_CLR(t,(s), EPOLLIN)
 214 # define SLAP_SOCK_CLR_WRITE(t,s)               SLAP_EPOLL_SOCK_CLR(t,(s), EPOLLOUT)
 215
 216 #  define SLAP_SOCK_SET_SUSPEND(t,s) \
 217         ( slap_daemon[t].sd_suspend[SLAP_EPOLL_SOCK_IX(t,s)] = 1 )
 218 #  define SLAP_SOCK_CLR_SUSPEND(t,s) \
 219         ( slap_daemon[t].sd_suspend[SLAP_EPOLL_SOCK_IX(t,s)] = 0 )
 220 #  define SLAP_SOCK_IS_SUSPEND(t,s) \
 221         ( slap_daemon[t].sd_suspend[SLAP_EPOLL_SOCK_IX(t,s)] == 1 )
 222
 223 # define SLAP_EPOLL_EVENT_CLR(i, mode)  (revents[(i)].events &= ~(mode))
 224
 225 # define SLAP_EVENT_MAX(t)                      slap_daemon[t].sd_nfds
 226
 227 /* If a Listener address is provided, store that as the epoll data.
 228  * Otherwise, store the address of this socket's slot in the
 229  * index array. If we can't do this add, the system is out of
 230  * resources and we need to shutdown.
 231  */
 232 # define SLAP_SOCK_ADD(t, s, l)         do { \
 233         int rc; \
 234         SLAP_EPOLL_SOCK_IX(t,(s)) = slap_daemon[t].sd_nfds; \
 235         SLAP_EPOLL_SOCK_EP(t,(s)).data.ptr = (l) ? (l) : (void *)(&SLAP_EPOLL_SOCK_IX(t,s)); \
 236         SLAP_EPOLL_SOCK_EV(t,(s)) = EPOLLIN; \
 237         rc = epoll_ctl(slap_daemon[t].sd_epfd, EPOLL_CTL_ADD, \
 238                 (s), &SLAP_EPOLL_SOCK_EP(t,(s))); \
 239         if ( rc == 0 ) { \
 240                 slap_daemon[t].sd_nfds++; \
 241         } else { \
 242                 Debug( LDAP_DEBUG_ANY, \
 243                         "daemon: epoll_ctl(ADD,fd=%d) failed, errno=%d, shutting down\n", \
 244                         s, errno, 0 ); \
 245                 slapd_shutdown = 2; \
 246         } \
 247 } while (0)
 248
 249 # define SLAP_EPOLL_EV_LISTENER(t,ptr) \
 250         (((int *)(ptr) >= slap_daemon[t].sd_index && \
 251         (int *)(ptr) <= &slap_daemon[t].sd_index[dtblsize]) ? 0 : 1 )
 252
 253 # define SLAP_EPOLL_EV_PTRFD(t,ptr)             (SLAP_EPOLL_EV_LISTENER(t,ptr) ? \
 254         ((Listener *)ptr)->sl_sd : \
 255         (ber_socket_t) ((int *)(ptr) - slap_daemon[t].sd_index))
 256
 257 # define SLAP_SOCK_DEL(t,s)             do { \
 258         int fd, rc, index = SLAP_EPOLL_SOCK_IX(t,(s)); \
 259         if ( index < 0 ) break; \
 260         rc = epoll_ctl(slap_daemon[t].sd_epfd, EPOLL_CTL_DEL, \
 261                 (s), &SLAP_EPOLL_SOCK_EP(t,(s))); \
 262         slap_daemon[t].sd_epolls[index] = \
 263                 slap_daemon[t].sd_epolls[slap_daemon[t].sd_nfds-1]; \
 264         fd = SLAP_EPOLL_EV_PTRFD(t,slap_daemon[t].sd_epolls[index].data.ptr); \
 265         slap_daemon[t].sd_index[fd] = index; \
 266         slap_daemon[t].sd_index[(s)] = -1; \
 267         slap_daemon[t].sd_nfds--; \
 268 } while (0)
 269
 270 # define SLAP_EVENT_CLR_READ(i)         SLAP_EPOLL_EVENT_CLR((i), EPOLLIN)
 271 # define SLAP_EVENT_CLR_WRITE(i)        SLAP_EPOLL_EVENT_CLR((i), EPOLLOUT)
 272
 273 # define SLAP_EPOLL_EVENT_CHK(i, mode)  (revents[(i)].events & mode)
 274
 275 # define SLAP_EVENT_IS_READ(i)          SLAP_EPOLL_EVENT_CHK((i), EPOLLIN)
 276 # define SLAP_EVENT_IS_WRITE(i)         SLAP_EPOLL_EVENT_CHK((i), EPOLLOUT)
 277 # define SLAP_EVENT_IS_LISTENER(t,i)    SLAP_EPOLL_EV_LISTENER(t,revents[(i)].data.ptr)
 278 # define SLAP_EVENT_LISTENER(t,i)               ((Listener *)(revents[(i)].data.ptr))
 279
 280 # define SLAP_EVENT_FD(t,i)             SLAP_EPOLL_EV_PTRFD(t,revents[(i)].data.ptr)
 281
 282 # define SLAP_SOCK_INIT(t)              do { \
 283         int j; \
 284         slap_daemon[t].sd_epolls = ch_calloc(1, \
 285                 ( sizeof(struct epoll_event) * 2 \
 286                         + sizeof(int) ) * dtblsize * 2); \
 287         slap_daemon[t].sd_index = (int *)&slap_daemon[t].sd_epolls[ 2 * dtblsize ]; \
 288         slap_daemon[t].sd_epfd = epoll_create( dtblsize / slapd_daemon_threads ); \
 289         for ( j = 0; j < dtblsize; j++ ) slap_daemon[t].sd_index[j] = -1; \
 290 } while (0)
 291
 292 # define SLAP_SOCK_DESTROY(t)           do { \
 293         if ( slap_daemon[t].sd_epolls != NULL ) { \
 294                 ch_free( slap_daemon[t].sd_epolls ); \
 295                 slap_daemon[t].sd_epolls = NULL; \
 296                 slap_daemon[t].sd_index = NULL; \
 297                 close( slap_daemon[t].sd_epfd ); \
 298         } \
 299 } while ( 0 )
 300
 301 # define SLAP_EVENT_DECL                struct epoll_event *revents
 302
 303 # define SLAP_EVENT_INIT(t)             do { \
 304         revents = slap_daemon[t].sd_epolls + dtblsize; \
 305 } while (0)
 306
 307 # define SLAP_EVENT_WAIT(t, tvp, nsp)   do { \
 308         *(nsp) = epoll_wait( slap_daemon[t].sd_epfd, revents, \
 309                 dtblsize, (tvp) ? (tvp)->tv_sec * 1000 : -1 ); \
 310 } while (0)
 311
 312 #elif defined(SLAP_X_DEVPOLL) && defined(HAVE_DEVPOLL)
 313
 314 /*************************************************************
 315  * Use Solaris' (>= 2.7) /dev/poll infrastructure - poll(7d) *
 316  *************************************************************/
 317 # define SLAP_EVENT_FNAME               "/dev/poll"
 318 # define SLAP_EVENTS_ARE_INDEXED        0
 319 /*
 320  * - sd_index   is used much like with epoll()
 321  * - sd_l       is maintained as an array containing the address
 322  *              of the listener; the index is the fd itself
 323  * - sd_pollfd  is used to keep track of what data has been
 324  *              registered in /dev/poll
 325  */
 326 # define SLAP_DEVPOLL_SOCK_IX(t,s)      (slap_daemon[t].sd_index[(s)])
 327 # define SLAP_DEVPOLL_SOCK_LX(t,s)      (slap_daemon[t].sd_l[(s)])
 328 # define SLAP_DEVPOLL_SOCK_EP(t,s)      (slap_daemon[t].sd_pollfd[SLAP_DEVPOLL_SOCK_IX(t,(s))])
 329 # define SLAP_DEVPOLL_SOCK_FD(t,s)      (SLAP_DEVPOLL_SOCK_EP(t,(s)).fd)
 330 # define SLAP_DEVPOLL_SOCK_EV(t,s)      (SLAP_DEVPOLL_SOCK_EP(t,(s)).events)
 331 # define SLAP_SOCK_IS_ACTIVE(t,s)               (SLAP_DEVPOLL_SOCK_IX(t,(s)) != -1)
 332 # define SLAP_SOCK_NOT_ACTIVE(t,s)      (SLAP_DEVPOLL_SOCK_IX(t,(s)) == -1)
 333 # define SLAP_SOCK_IS_SET(t,s, mode)    (SLAP_DEVPOLL_SOCK_EV(t,(s)) & (mode))
 334
 335 # define SLAP_SOCK_IS_READ(t,s)         SLAP_SOCK_IS_SET(t,(s), POLLIN)
 336 # define SLAP_SOCK_IS_WRITE(t,s)                SLAP_SOCK_IS_SET(t,(s), POLLOUT)
 337
 338 /* as far as I understand, any time we need to communicate with the kernel
 339  * about the number and/or properties of a file descriptor we need it to
 340  * wait for, we have to rewrite the whole set */
 341 # define SLAP_DEVPOLL_WRITE_POLLFD(t,s, pfd, n, what, shdn)     do { \
 342         int rc; \
 343         size_t size = (n) * sizeof( struct pollfd ); \
 344         /* FIXME: use pwrite? */ \
 345         rc = write( slap_daemon[t].sd_dpfd, (pfd), size ); \
 346         if ( rc != size ) { \
 347                 Debug( LDAP_DEBUG_ANY, "daemon: " SLAP_EVENT_FNAME ": " \
 348                         "%s fd=%d failed errno=%d\n", \
 349                         (what), (s), errno ); \
 350                 if ( (shdn) ) { \
 351                         slapd_shutdown = 2; \
 352                 } \
 353         } \
 354 } while (0)
 355
 356 # define SLAP_DEVPOLL_SOCK_SET(t,s, mode)       do { \
 357         Debug( LDAP_DEBUG_CONNS, "SLAP_SOCK_SET_%s(%d)=%d\n", \
 358                 (mode) == POLLIN ? "READ" : "WRITE", (s), \
 359                 ( (SLAP_DEVPOLL_SOCK_EV(t,(s)) & (mode)) != (mode) ) ); \
 360         if ( (SLAP_DEVPOLL_SOCK_EV(t,(s)) & (mode)) != (mode) ) { \
 361                 struct pollfd pfd; \
 362                 SLAP_DEVPOLL_SOCK_EV(t,(s)) |= (mode); \
 363                 pfd.fd = SLAP_DEVPOLL_SOCK_FD(t,(s)); \
 364                 pfd.events = /* (mode) */ SLAP_DEVPOLL_SOCK_EV(t,(s)); \
 365                 SLAP_DEVPOLL_WRITE_POLLFD(t,(s), &pfd, 1, "SET", 0); \
 366         } \
 367 } while (0)
 368
 369 # define SLAP_DEVPOLL_SOCK_CLR(t,s, mode)               do { \
 370         Debug( LDAP_DEBUG_CONNS, "SLAP_SOCK_CLR_%s(%d)=%d\n", \
 371                 (mode) == POLLIN ? "READ" : "WRITE", (s), \
 372                 ( (SLAP_DEVPOLL_SOCK_EV(t,(s)) & (mode)) == (mode) ) ); \
 373         if ((SLAP_DEVPOLL_SOCK_EV(t,(s)) & (mode)) == (mode) ) { \
 374                 struct pollfd pfd[2]; \
 375                 SLAP_DEVPOLL_SOCK_EV(t,(s)) &= ~(mode); \
 376                 pfd[0].fd = SLAP_DEVPOLL_SOCK_FD(t,(s)); \
 377                 pfd[0].events = POLLREMOVE; \
 378                 pfd[1] = SLAP_DEVPOLL_SOCK_EP(t,(s)); \
 379                 SLAP_DEVPOLL_WRITE_POLLFD(t,(s), &pfd[0], 2, "CLR", 0); \
 380         } \
 381 } while (0)
 382
 383 # define SLAP_SOCK_SET_READ(t,s)                SLAP_DEVPOLL_SOCK_SET(t,s, POLLIN)
 384 # define SLAP_SOCK_SET_WRITE(t,s)               SLAP_DEVPOLL_SOCK_SET(t,s, POLLOUT)
 385
 386 # define SLAP_SOCK_CLR_READ(t,s)                SLAP_DEVPOLL_SOCK_CLR(t,(s), POLLIN)
 387 # define SLAP_SOCK_CLR_WRITE(t,s)               SLAP_DEVPOLL_SOCK_CLR(t,(s), POLLOUT)
 388
 389 #  define SLAP_SOCK_SET_SUSPEND(t,s) \
 390         ( slap_daemon[t].sd_suspend[SLAP_DEVPOLL_SOCK_IX(t,(s))] = 1 )
 391 #  define SLAP_SOCK_CLR_SUSPEND(t,s) \
 392         ( slap_daemon[t].sd_suspend[SLAP_DEVPOLL_SOCK_IX(t,(s))] = 0 )
 393 #  define SLAP_SOCK_IS_SUSPEND(t,s) \
 394         ( slap_daemon[t].sd_suspend[SLAP_DEVPOLL_SOCK_IX(t,(s))] == 1 )
 395
 396 # define SLAP_DEVPOLL_EVENT_CLR(i, mode)        (revents[(i)].events &= ~(mode))
 397
 398 # define SLAP_EVENT_MAX(t)                      slap_daemon[t].sd_nfds
 399
 400 /* If a Listener address is provided, store that in the sd_l array.
 401  * If we can't do this add, the system is out of resources and we
 402  * need to shutdown.
 403  */
 404 # define SLAP_SOCK_ADD(t, s, l)         do { \
 405         Debug( LDAP_DEBUG_CONNS, "SLAP_SOCK_ADD(%d, %p)\n", (s), (l), 0 ); \
 406         SLAP_DEVPOLL_SOCK_IX(t,(s)) = slap_daemon[t].sd_nfds; \
 407         SLAP_DEVPOLL_SOCK_LX(t,(s)) = (l); \
 408         SLAP_DEVPOLL_SOCK_FD(t,(s)) = (s); \
 409         SLAP_DEVPOLL_SOCK_EV(t,(s)) = POLLIN; \
 410         SLAP_DEVPOLL_WRITE_POLLFD(t,(s), &SLAP_DEVPOLL_SOCK_EP((s)), 1, "ADD", 1); \
 411         slap_daemon[t].sd_nfds++; \
 412 } while (0)
 413
 414 # define SLAP_DEVPOLL_EV_LISTENER(ptr)  ((ptr) != NULL)
 415
 416 # define SLAP_SOCK_DEL(t,s)             do { \
 417         int fd, index = SLAP_DEVPOLL_SOCK_IX(t,(s)); \
 418         Debug( LDAP_DEBUG_CONNS, "SLAP_SOCK_DEL(%d)\n", (s), 0, 0 ); \
 419         if ( index < 0 ) break; \
 420         if ( index < slap_daemon[t].sd_nfds - 1 ) { \
 421                 struct pollfd pfd = slap_daemon[t].sd_pollfd[index]; \
 422                 fd = slap_daemon[t].sd_pollfd[slap_daemon[t].sd_nfds - 1].fd; \
 423                 slap_daemon[t].sd_pollfd[index] = slap_daemon[t].sd_pollfd[slap_daemon[t].sd_nfds - 1]; \
 424                 slap_daemon[t].sd_pollfd[slap_daemon[t].sd_nfds - 1] = pfd; \
 425                 slap_daemon[t].sd_index[fd] = index; \
 426         } \
 427         slap_daemon[t].sd_index[(s)] = -1; \
 428         slap_daemon[t].sd_pollfd[slap_daemon[t].sd_nfds - 1].events = POLLREMOVE; \
 429         SLAP_DEVPOLL_WRITE_POLLFD(t,(s), &slap_daemon[t].sd_pollfd[slap_daemon[t].sd_nfds - 1], 1, "DEL", 0); \
 430         slap_daemon[t].sd_pollfd[slap_daemon[t].sd_nfds - 1].events = 0; \
 431         slap_daemon[t].sd_nfds--; \
 432 } while (0)
 433
 434 # define SLAP_EVENT_CLR_READ(i)         SLAP_DEVPOLL_EVENT_CLR((i), POLLIN)
 435 # define SLAP_EVENT_CLR_WRITE(i)        SLAP_DEVPOLL_EVENT_CLR((i), POLLOUT)
 436
 437 # define SLAP_DEVPOLL_EVENT_CHK(i, mode)        (revents[(i)].events & (mode))
 438
 439 # define SLAP_EVENT_FD(t,i)             (revents[(i)].fd)
 440
 441 # define SLAP_EVENT_IS_READ(i)          SLAP_DEVPOLL_EVENT_CHK((i), POLLIN)
 442 # define SLAP_EVENT_IS_WRITE(i)         SLAP_DEVPOLL_EVENT_CHK((i), POLLOUT)
 443 # define SLAP_EVENT_IS_LISTENER(t,i)    SLAP_DEVPOLL_EV_LISTENER(SLAP_DEVPOLL_SOCK_LX(SLAP_EVENT_FD(t,(i))))
 444 # define SLAP_EVENT_LISTENER(t,i)               SLAP_DEVPOLL_SOCK_LX(SLAP_EVENT_FD(t,(i)))
 445
 446 # define SLAP_SOCK_INIT(t)              do { \
 447         slap_daemon[t].sd_pollfd = ch_calloc( 1, \
 448                 ( sizeof(struct pollfd) * 2 \
 449                         + sizeof( int ) \
 450                         + sizeof( Listener * ) ) * dtblsize ); \
 451         slap_daemon[t].sd_index = (int *)&slap_daemon[t].sd_pollfd[ 2 * dtblsize ]; \
 452         slap_daemon[t].sd_l = (Listener **)&slap_daemon[t].sd_index[ dtblsize ]; \
 453         slap_daemon[t].sd_dpfd = open( SLAP_EVENT_FNAME, O_RDWR ); \
 454         if ( slap_daemon[t].sd_dpfd == -1 ) { \
 455                 Debug( LDAP_DEBUG_ANY, "daemon: " SLAP_EVENT_FNAME ": " \
 456                         "open(\"" SLAP_EVENT_FNAME "\") failed errno=%d\n", \
 457                         errno, 0, 0 ); \
 458                 SLAP_SOCK_DESTROY; \
 459                 return -1; \
 460         } \
 461         for ( i = 0; i < dtblsize; i++ ) { \
 462                 slap_daemon[t].sd_pollfd[i].fd = -1; \
 463                 slap_daemon[t].sd_index[i] = -1; \
 464         } \
 465 } while (0)
 466
 467 # define SLAP_SOCK_DESTROY(t)           do { \
 468         if ( slap_daemon[t].sd_pollfd != NULL ) { \
 469                 ch_free( slap_daemon[t].sd_pollfd ); \
 470                 slap_daemon[t].sd_pollfd = NULL; \
 471                 slap_daemon[t].sd_index = NULL; \
 472                 slap_daemon[t].sd_l = NULL; \
 473                 close( slap_daemon[t].sd_dpfd ); \
 474         } \
 475 } while ( 0 )
 476
 477 # define SLAP_EVENT_DECL                struct pollfd *revents
 478
 479 # define SLAP_EVENT_INIT(t)             do { \
 480         revents = &slap_daemon[t].sd_pollfd[ dtblsize ]; \
 481 } while (0)
 482
 483 # define SLAP_EVENT_WAIT(t, tvp, nsp)   do { \
 484         struct dvpoll           sd_dvpoll; \
 485         sd_dvpoll.dp_timeout = (tvp) ? (tvp)->tv_sec * 1000 : -1; \
 486         sd_dvpoll.dp_nfds = dtblsize; \
 487         sd_dvpoll.dp_fds = revents; \
 488         *(nsp) = ioctl( slap_daemon[t].sd_dpfd, DP_POLL, &sd_dvpoll ); \
 489 } while (0)
 490
 491 #else /* ! epoll && ! /dev/poll */
 492 # ifdef HAVE_WINSOCK
 493 # define SLAP_EVENT_FNAME               "WSselect"
 494 /* Winsock provides a "select" function but its fd_sets are
 495  * actually arrays of sockets. Since these sockets are handles
 496  * and not a contiguous range of small integers, we manage our
 497  * own "fd" table of socket handles and use their indices as
 498  * descriptors.
 499  *
 500  * All of our listener/connection structures use fds; the actual
 501  * I/O functions use sockets. The SLAP_FD2SOCK macro in proto-slap.h
 502  * handles the mapping.
 503  *
 504  * Despite the mapping overhead, this is about 45% more efficient
 505  * than just using Winsock's select and FD_ISSET directly.
 506  *
 507  * Unfortunately Winsock's select implementation doesn't scale well
 508  * as the number of connections increases. This probably needs to be
 509  * rewritten to use the Winsock overlapped/asynchronous I/O functions.
 510  */
 511 # define SLAP_EVENTS_ARE_INDEXED        1
 512 # define SLAP_EVENT_DECL                fd_set readfds, writefds; char *rflags
 513 # define SLAP_EVENT_INIT(t)     do { \
 514         int i; \
 515         FD_ZERO( &readfds ); \
 516         FD_ZERO( &writefds ); \
 517         rflags = slap_daemon[t].sd_rflags; \
 518         memset( rflags, 0, slap_daemon[t].sd_nfds ); \
 519         for ( i=0; i<slap_daemon[t].sd_nfds; i++ ) { \
 520                 if ( slap_daemon[t].sd_flags[i] & SD_READ ) \
 521                         FD_SET( slapd_ws_sockets[i], &readfds );\
 522                 if ( slap_daemon[t].sd_flags[i] & SD_WRITE ) \
 523                         FD_SET( slapd_ws_sockets[i], &writefds ); \
 524         } } while ( 0 )
 525
 526 # define SLAP_EVENT_MAX(t)              slap_daemon[t].sd_nfds
 527
 528 # define SLAP_EVENT_WAIT(t, tvp, nsp)   do { \
 529         int i; \
 530         *(nsp) = select( SLAP_EVENT_MAX(t), &readfds, \
 531                 nwriters > 0 ? &writefds : NULL, NULL, (tvp) ); \
 532         for ( i=0; i<readfds.fd_count; i++) { \
 533                 int fd = slapd_sock2fd(readfds.fd_array[i]); \
 534                 if ( fd >= 0 ) { \
 535                         slap_daemon[t].sd_rflags[fd] = SD_READ; \
 536                         if ( fd >= *(nsp)) *(nsp) = fd+1; \
 537                 } \
 538         } \
 539         for ( i=0; i<writefds.fd_count; i++) { \
 540                 int fd = slapd_sock2fd(writefds.fd_array[i]); \
 541                 if ( fd >= 0 ) { \
 542                         slap_daemon[t].sd_rflags[fd] = SD_WRITE; \
 543                         if ( fd >= *(nsp)) *(nsp) = fd+1; \
 544                 } \
 545         } \
 546 } while (0)
 547
 548 # define SLAP_EVENT_IS_READ(fd)         (rflags[fd] & SD_READ)
 549 # define SLAP_EVENT_IS_WRITE(fd)        (rflags[fd] & SD_WRITE)
 550
 551 # define SLAP_EVENT_CLR_READ(fd)        rflags[fd] &= ~SD_READ
 552 # define SLAP_EVENT_CLR_WRITE(fd)       rflags[fd] &= ~SD_WRITE
 553
 554 # define SLAP_SOCK_INIT(t)              do { \
 555         if (!t) { \
 556         ldap_pvt_thread_mutex_init( &slapd_ws_mutex ); \
 557         slapd_ws_sockets = ch_malloc( dtblsize * ( sizeof(SOCKET) + 2)); \
 558         memset( slapd_ws_sockets, -1, dtblsize * sizeof(SOCKET) ); \
 559         } \
 560         slap_daemon[t].sd_flags = (char *)(slapd_ws_sockets + dtblsize); \
 561         slap_daemon[t].sd_rflags = slap_daemon[t].sd_flags + dtblsize; \
 562         memset( slap_daemon[t].sd_flags, 0, dtblsize ); \
 563         slapd_ws_sockets[t*2] = wake_sds[t][0]; \
 564         slapd_ws_sockets[t*2+1] = wake_sds[t][1]; \
 565         wake_sds[t][0] = t*2; \
 566         wake_sds[t][1] = t*2+1; \
 567         slap_daemon[t].sd_nfds = t*2 + 2; \
 568         } while ( 0 )
 569
 570 # define SLAP_SOCK_DESTROY(t)   do { \
 571         ch_free( slapd_ws_sockets ); slapd_ws_sockets = NULL; \
 572         slap_daemon[t].sd_flags = NULL; \
 573         slap_daemon[t].sd_rflags = NULL; \
 574         ldap_pvt_thread_mutex_destroy( &slapd_ws_mutex ); \
 575         } while ( 0 )
 576
 577 # define SLAP_SOCK_IS_ACTIVE(t,fd) ( slap_daemon[t].sd_flags[fd] & SD_ACTIVE )
 578 # define SLAP_SOCK_IS_READ(t,fd) ( slap_daemon[t].sd_flags[fd] & SD_READ )
 579 # define SLAP_SOCK_IS_WRITE(t,fd) ( slap_daemon[t].sd_flags[fd] & SD_WRITE )
 580 # define SLAP_SOCK_NOT_ACTIVE(t,fd)     (!slap_daemon[t].sd_flags[fd])
 581
 582 # define SLAP_SOCK_SET_READ(t,fd)               ( slap_daemon[t].sd_flags[fd] |= SD_READ )
 583 # define SLAP_SOCK_SET_WRITE(t,fd)              ( slap_daemon[t].sd_flags[fd] |= SD_WRITE )
 584
 585 # define SLAP_SELECT_ADDTEST(t,s)       do { \
 586         if ((s) >= slap_daemon[t].sd_nfds) slap_daemon[t].sd_nfds = (s)+1; \
 587 } while (0)
 588
 589 # define SLAP_SOCK_CLR_READ(t,fd)               ( slap_daemon[t].sd_flags[fd] &= ~SD_READ )
 590 # define SLAP_SOCK_CLR_WRITE(t,fd)              ( slap_daemon[t].sd_flags[fd] &= ~SD_WRITE )
 591
 592 # define SLAP_SOCK_ADD(t,s, l)  do { \
 593         SLAP_SELECT_ADDTEST(t,(s)); \
 594         slap_daemon[t].sd_flags[s] = SD_ACTIVE|SD_READ; \
 595 } while ( 0 )
 596
 597 # define SLAP_SOCK_DEL(t,s) do { \
 598         slap_daemon[t].sd_flags[s] = 0; \
 599         slapd_sockdel( s ); \
 600 } while ( 0 )
 601
 602 # else /* !HAVE_WINSOCK */
 603
 604 /**************************************
 605  * Use select system call - select(2) *
 606  **************************************/
 607 # define SLAP_EVENT_FNAME               "select"
 608 /* select */
 609 # define SLAP_EVENTS_ARE_INDEXED        1
 610 # define SLAP_EVENT_DECL                fd_set readfds, writefds
 611
 612 # define SLAP_EVENT_INIT(t)             do { \
 613         AC_MEMCPY( &readfds, &slap_daemon[t].sd_readers, sizeof(fd_set) );      \
 614         if ( nwriters ) { \
 615                 AC_MEMCPY( &writefds, &slap_daemon[t].sd_writers, sizeof(fd_set) ); \
 616         } else { \
 617                 FD_ZERO( &writefds ); \
 618         } \
 619 } while (0)
 620
 621 # ifdef FD_SETSIZE
 622 #  define SLAP_SELECT_CHK_SETSIZE       do { \
 623         if (dtblsize > FD_SETSIZE) dtblsize = FD_SETSIZE; \
 624 } while (0)
 625 # else /* ! FD_SETSIZE */
 626 #  define SLAP_SELECT_CHK_SETSIZE       do { ; } while (0)
 627 # endif /* ! FD_SETSIZE */
 628
 629 # define SLAP_SOCK_INIT(t)                      do { \
 630         SLAP_SELECT_CHK_SETSIZE; \
 631         FD_ZERO(&slap_daemon[t].sd_actives); \
 632         FD_ZERO(&slap_daemon[t].sd_readers); \
 633         FD_ZERO(&slap_daemon[t].sd_writers); \
 634 } while (0)
 635
 636 # define SLAP_SOCK_DESTROY(t)
 637
 638 # define SLAP_SOCK_IS_ACTIVE(t,fd)      FD_ISSET((fd), &slap_daemon[t].sd_actives)
 639 # define SLAP_SOCK_IS_READ(t,fd)                FD_ISSET((fd), &slap_daemon[t].sd_readers)
 640 # define SLAP_SOCK_IS_WRITE(t,fd)               FD_ISSET((fd), &slap_daemon[t].sd_writers)
 641
 642 # define SLAP_SOCK_NOT_ACTIVE(t,fd)     (!SLAP_SOCK_IS_ACTIVE(t,fd) && \
 643          !SLAP_SOCK_IS_READ(t,fd) && !SLAP_SOCK_IS_WRITE(t,fd))
 644
 645 # define SLAP_SOCK_SET_READ(t,fd)       FD_SET((fd), &slap_daemon[t].sd_readers)
 646 # define SLAP_SOCK_SET_WRITE(t,fd)      FD_SET((fd), &slap_daemon[t].sd_writers)
 647
 648 # define SLAP_EVENT_MAX(t)              slap_daemon[t].sd_nfds
 649 # define SLAP_SELECT_ADDTEST(t,s)       do { \
 650         if ((s) >= slap_daemon[t].sd_nfds) slap_daemon[t].sd_nfds = (s)+1; \
 651 } while (0)
 652
 653 # define SLAP_SOCK_CLR_READ(t,fd)               FD_CLR((fd), &slap_daemon[t].sd_readers)
 654 # define SLAP_SOCK_CLR_WRITE(t,fd)      FD_CLR((fd), &slap_daemon[t].sd_writers)
 655
 656 # define SLAP_SOCK_ADD(t,s, l)          do { \
 657         SLAP_SELECT_ADDTEST(t,(s)); \
 658         FD_SET((s), &slap_daemon[t].sd_actives); \
 659         FD_SET((s), &slap_daemon[t].sd_readers); \
 660 } while (0)
 661
 662 # define SLAP_SOCK_DEL(t,s)             do { \
 663         FD_CLR((s), &slap_daemon[t].sd_actives); \
 664         FD_CLR((s), &slap_daemon[t].sd_readers); \
 665         FD_CLR((s), &slap_daemon[t].sd_writers); \
 666 } while (0)
 667
 668 # define SLAP_EVENT_IS_READ(fd)         FD_ISSET((fd), &readfds)
 669 # define SLAP_EVENT_IS_WRITE(fd)        FD_ISSET((fd), &writefds)
 670
 671 # define SLAP_EVENT_CLR_READ(fd)        FD_CLR((fd), &readfds)
 672 # define SLAP_EVENT_CLR_WRITE(fd)       FD_CLR((fd), &writefds)
 673
 674 # define SLAP_EVENT_WAIT(t, tvp, nsp)   do { \
 675         *(nsp) = select( SLAP_EVENT_MAX(t), &readfds, \
 676                 nwriters > 0 ? &writefds : NULL, NULL, (tvp) ); \
 677 } while (0)
 678 # endif /* !HAVE_WINSOCK */
 679 #endif /* ! epoll && ! /dev/poll */
 680
 681 #ifdef HAVE_SLP
 682 /*
 683  * SLP related functions
 684  */
 685 #include <slp.h>
 686
 687 #define LDAP_SRVTYPE_PREFIX "service:ldap://"
 688 #define LDAPS_SRVTYPE_PREFIX "service:ldaps://"
 689 static char** slapd_srvurls = NULL;
 690 static SLPHandle slapd_hslp = 0;
 691 int slapd_register_slp = 0;
 692 const char *slapd_slp_attrs = NULL;
 693
 694 static SLPError slapd_slp_cookie;
 695
 696 static void
 697 slapd_slp_init( const char* urls )
 698 {
 699         int i;
 700         SLPError err;
 701
 702         slapd_srvurls = ldap_str2charray( urls, " " );
 703
 704         if ( slapd_srvurls == NULL ) return;
 705
 706         /* find and expand INADDR_ANY URLs */
 707         for ( i = 0; slapd_srvurls[i] != NULL; i++ ) {
 708                 if ( strcmp( slapd_srvurls[i], "ldap:///" ) == 0 ) {
 709                         slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i],
 710                                 global_host_bv.bv_len +
 711                                 sizeof( LDAP_SRVTYPE_PREFIX ) );
 712                         strcpy( lutil_strcopy(slapd_srvurls[i],
 713                                 LDAP_SRVTYPE_PREFIX ), global_host_bv.bv_val );
 714                 } else if ( strcmp( slapd_srvurls[i], "ldaps:///" ) == 0 ) {
 715                         slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i],
 716                                 global_host_bv.bv_len +
 717                                 sizeof( LDAPS_SRVTYPE_PREFIX ) );
 718                         strcpy( lutil_strcopy(slapd_srvurls[i],
 719                                 LDAPS_SRVTYPE_PREFIX ), global_host_bv.bv_val );
 720                 }
 721         }
 722
 723         /* open the SLP handle */
 724         err = SLPOpen( "en", 0, &slapd_hslp );
 725
 726         if ( err != SLP_OK ) {
 727                 Debug( LDAP_DEBUG_CONNS, "daemon: SLPOpen() failed with %ld\n",
 728                         (long)err, 0, 0 );
 729         }
 730 }
 731
 732 static void
 733 slapd_slp_deinit( void )
 734 {
 735         if ( slapd_srvurls == NULL ) return;
 736
 737         ldap_charray_free( slapd_srvurls );
 738         slapd_srvurls = NULL;
 739
 740         /* close the SLP handle */
 741         SLPClose( slapd_hslp );
 742 }
 743
 744 static void
 745 slapd_slp_regreport(
 746         SLPHandle       hslp,
 747         SLPError        errcode,
 748         void            *cookie )
 749 {
 750         /* return the error code in the cookie */
 751         *(SLPError*)cookie = errcode;
 752 }
 753
 754 static void
 755 slapd_slp_reg()
 756 {
 757         int i;
 758         SLPError err;
 759
 760         if ( slapd_srvurls == NULL ) return;
 761
 762         for ( i = 0; slapd_srvurls[i] != NULL; i++ ) {
 763                 if ( strncmp( slapd_srvurls[i], LDAP_SRVTYPE_PREFIX,
 764                                 sizeof( LDAP_SRVTYPE_PREFIX ) - 1 ) == 0 ||
 765                         strncmp( slapd_srvurls[i], LDAPS_SRVTYPE_PREFIX,
 766                                 sizeof( LDAPS_SRVTYPE_PREFIX ) - 1 ) == 0 )
 767                 {
 768                         err = SLPReg( slapd_hslp,
 769                                 slapd_srvurls[i],
 770                                 SLP_LIFETIME_MAXIMUM,
 771                                 "ldap",
 772                                 (slapd_slp_attrs) ? slapd_slp_attrs : "",
 773                                 SLP_TRUE,
 774                                 slapd_slp_regreport,
 775                                 &slapd_slp_cookie );
 776
 777                         if ( err != SLP_OK || slapd_slp_cookie != SLP_OK ) {
 778                                 Debug( LDAP_DEBUG_CONNS,
 779                                         "daemon: SLPReg(%s) failed with %ld, cookie = %ld\n",
 780                                         slapd_srvurls[i], (long)err, (long)slapd_slp_cookie );
 781                         }
 782                 }
 783         }
 784 }
 785
 786 static void
 787 slapd_slp_dereg( void )
 788 {
 789         int i;
 790         SLPError err;
 791
 792         if ( slapd_srvurls == NULL ) return;
 793
 794         for ( i = 0; slapd_srvurls[i] != NULL; i++ ) {
 795                 err = SLPDereg( slapd_hslp,
 796                         slapd_srvurls[i],
 797                         slapd_slp_regreport,
 798                         &slapd_slp_cookie );
 799
 800                 if ( err != SLP_OK || slapd_slp_cookie != SLP_OK ) {
 801                         Debug( LDAP_DEBUG_CONNS,
 802                                 "daemon: SLPDereg(%s) failed with %ld, cookie = %ld\n",
 803                                 slapd_srvurls[i], (long)err, (long)slapd_slp_cookie );
 804                 }
 805         }
 806 }
 807 #endif /* HAVE_SLP */
 808
 809 #ifdef HAVE_WINSOCK
 810 /* Manage the descriptor to socket table */
 811 ber_socket_t
 812 slapd_socknew( ber_socket_t s )
 813 {
 814         ber_socket_t i;
 815         ldap_pvt_thread_mutex_lock( &slapd_ws_mutex );
 816         for ( i = 0; i < dtblsize && slapd_ws_sockets[i] != INVALID_SOCKET; i++ );
 817         if ( i == dtblsize ) {
 818                 WSASetLastError( WSAEMFILE );
 819         } else {
 820                 slapd_ws_sockets[i] = s;
 821         }
 822         ldap_pvt_thread_mutex_unlock( &slapd_ws_mutex );
 823         return i;
 824 }
 825
 826 void
 827 slapd_sockdel( ber_socket_t s )
 828 {
 829         ldap_pvt_thread_mutex_lock( &slapd_ws_mutex );
 830         slapd_ws_sockets[s] = INVALID_SOCKET;
 831         ldap_pvt_thread_mutex_unlock( &slapd_ws_mutex );
 832 }
 833
 834 ber_socket_t
 835 slapd_sock2fd( ber_socket_t s )
 836 {
 837         ber_socket_t i;
 838         for ( i=0; i<dtblsize && slapd_ws_sockets[i] != s; i++);
 839         if ( i == dtblsize )
 840                 i = -1;
 841         return i;
 842 }
 843 #endif
 844
 845 /*
 846  * Add a descriptor to daemon control
 847  *
 848  * If isactive, the descriptor is a live server session and is subject
 849  * to idletimeout control. Otherwise, the descriptor is a passive
 850  * listener or an outbound client session, and not subject to
 851  * idletimeout. The underlying event handler may record the Listener
 852  * argument to differentiate Listener's from real sessions.
 853  */
 854 static void
 855 slapd_add( ber_socket_t s, int isactive, Listener *sl, int id )
 856 {
 857         if (id < 0)
 858                 id = DAEMON_ID(s);
 859         ldap_pvt_thread_mutex_lock( &slap_daemon[id].sd_mutex );
 860
 861         assert( SLAP_SOCK_NOT_ACTIVE(id, s) );
 862
 863         if ( isactive ) slap_daemon[id].sd_nactives++;
 864
 865         SLAP_SOCK_ADD(id, s, sl);
 866
 867         Debug( LDAP_DEBUG_CONNS, "daemon: added %ldr%s listener=%p\n",
 868                 (long) s, isactive ? " (active)" : "", (void *)sl );
 869
 870         ldap_pvt_thread_mutex_unlock( &slap_daemon[id].sd_mutex );
 871
 872         WAKE_LISTENER(id,1);
 873 }
 874
 875 /*
 876  * Remove the descriptor from daemon control
 877  */
 878 void
 879 slapd_remove(
 880         ber_socket_t s,
 881         Sockbuf *sb,
 882         int wasactive,
 883         int wake,
 884         int locked )
 885 {
 886         int waswriter;
 887         int wasreader;
 888         int id = DAEMON_ID(s);
 889
 890         if ( !locked )
 891                 ldap_pvt_thread_mutex_lock( &slap_daemon[id].sd_mutex );
 892
 893         assert( SLAP_SOCK_IS_ACTIVE( id, s ));
 894
 895         if ( wasactive ) slap_daemon[id].sd_nactives--;
 896
 897         waswriter = SLAP_SOCK_IS_WRITE(id, s);
 898         wasreader = SLAP_SOCK_IS_READ(id, s);
 899
 900         Debug( LDAP_DEBUG_CONNS, "daemon: removing %ld%s%s\n",
 901                 (long) s,
 902                 wasreader ? "r" : "",
 903                 waswriter ? "w" : "" );
 904
 905         if ( waswriter ) slap_daemon[id].sd_nwriters--;
 906
 907         SLAP_SOCK_DEL(id, s);
 908
 909         if ( sb )
 910                 ber_sockbuf_free(sb);
 911
 912         /* If we ran out of file descriptors, we dropped a listener from
 913          * the select() loop. Now that we're removing a session from our
 914          * control, we can try to resume a dropped listener to use.
 915          */
 916         if ( emfile && listening ) {
 917                 int i;
 918                 for ( i = 0; slap_listeners[i] != NULL; i++ ) {
 919                         Listener *lr = slap_listeners[i];
 920
 921                         if ( lr->sl_sd == AC_SOCKET_INVALID ) continue;
 922                         if ( lr->sl_sd == s ) continue;
 923                         if ( lr->sl_mute ) {
 924                                 lr->sl_mute = 0;
 925                                 emfile--;
 926                                 if ( DAEMON_ID(lr->sl_sd) != id )
 927                                         WAKE_LISTENER(DAEMON_ID(lr->sl_sd), wake);
 928                                 break;
 929                         }
 930                 }
 931                 /* Walked the entire list without enabling anything; emfile
 932                  * counter is stale. Reset it.
 933                  */
 934                 if ( slap_listeners[i] == NULL ) emfile = 0;
 935         }
 936         ldap_pvt_thread_mutex_unlock( &slap_daemon[id].sd_mutex );
 937         WAKE_LISTENER(id, wake || slapd_gentle_shutdown == 2);
 938 }
 939
 940 void
 941 slapd_clr_write( ber_socket_t s, int wake )
 942 {
 943         int id = DAEMON_ID(s);
 944         ldap_pvt_thread_mutex_lock( &slap_daemon[id].sd_mutex );
 945
 946         if ( SLAP_SOCK_IS_WRITE( id, s )) {
 947                 assert( SLAP_SOCK_IS_ACTIVE( id, s ));
 948
 949                 SLAP_SOCK_CLR_WRITE( id, s );
 950                 slap_daemon[id].sd_nwriters--;
 951         }
 952
 953         ldap_pvt_thread_mutex_unlock( &slap_daemon[id].sd_mutex );
 954         WAKE_LISTENER(id,wake);
 955 }
 956
 957 void
 958 slapd_set_write( ber_socket_t s, int wake )
 959 {
 960         int id = DAEMON_ID(s);
 961         ldap_pvt_thread_mutex_lock( &slap_daemon[id].sd_mutex );
 962
 963         assert( SLAP_SOCK_IS_ACTIVE( id, s ));
 964
 965         if ( !SLAP_SOCK_IS_WRITE( id, s )) {
 966                 SLAP_SOCK_SET_WRITE( id, s );
 967                 slap_daemon[id].sd_nwriters++;
 968         }
 969
 970         ldap_pvt_thread_mutex_unlock( &slap_daemon[id].sd_mutex );
 971         WAKE_LISTENER(id,wake);
 972 }
 973
 974 int
 975 slapd_clr_read( ber_socket_t s, int wake )
 976 {
 977         int rc = 1;
 978         int id = DAEMON_ID(s);
 979         ldap_pvt_thread_mutex_lock( &slap_daemon[id].sd_mutex );
 980
 981         if ( SLAP_SOCK_IS_ACTIVE( id, s )) {
 982                 SLAP_SOCK_CLR_READ( id, s );
 983                 rc = 0;
 984         }
 985         ldap_pvt_thread_mutex_unlock( &slap_daemon[id].sd_mutex );
 986         if ( !rc )
 987                 WAKE_LISTENER(id,wake);
 988         return rc;
 989 }
 990
 991 void
 992 slapd_set_read( ber_socket_t s, int wake )
 993 {
 994         int do_wake = 1;
 995         int id = DAEMON_ID(s);
 996         ldap_pvt_thread_mutex_lock( &slap_daemon[id].sd_mutex );
 997
 998         if( SLAP_SOCK_IS_ACTIVE( id, s ) && !SLAP_SOCK_IS_READ( id, s )) {
 999                 SLAP_SOCK_SET_READ( id, s );
1000         } else {
1001                 do_wake = 0;
1002         }
1003         ldap_pvt_thread_mutex_unlock( &slap_daemon[id].sd_mutex );
1004         if ( do_wake )
1005                 WAKE_LISTENER(id,wake);
1006 }
1007
1008 static void
1009 slapd_close( ber_socket_t s )
1010 {
1011         Debug( LDAP_DEBUG_CONNS, "daemon: closing %ld\n",
1012                 (long) s, 0, 0 );
1013         tcp_close( SLAP_FD2SOCK(s) );
1014 #ifdef HAVE_WINSOCK
1015         slapd_sockdel( s );
1016 #endif
1017 }
1018
1019 void
1020 slapd_shutsock( ber_socket_t s )
1021 {
1022         Debug( LDAP_DEBUG_CONNS, "daemon: shutdown socket %ld\n",
1023                 (long) s, 0, 0 );
1024         shutdown( SLAP_FD2SOCK(s), 2 );
1025 }
1026
1027 static void
1028 slap_free_listener_addresses( struct sockaddr **sal )
1029 {
1030         struct sockaddr **sap;
1031         if (sal == NULL) return;
1032         for (sap = sal; *sap != NULL; sap++) ch_free(*sap);
1033         ch_free(sal);
1034 }
1035
1036 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
1037 static int
1038 get_url_perms(
1039         char    **exts,
1040         mode_t  *perms,
1041         int     *crit )
1042 {
1043         int     i;
1044
1045         assert( exts != NULL );
1046         assert( perms != NULL );
1047         assert( crit != NULL );
1048
1049         *crit = 0;
1050         for ( i = 0; exts[ i ]; i++ ) {
1051                 char    *type = exts[ i ];
1052                 int     c = 0;
1053
1054                 if ( type[ 0 ] == '!' ) {
1055                         c = 1;
1056                         type++;
1057                 }
1058
1059                 if ( strncasecmp( type, LDAPI_MOD_URLEXT "=",
1060                         sizeof(LDAPI_MOD_URLEXT "=") - 1 ) == 0 )
1061                 {
1062                         char *value = type + ( sizeof(LDAPI_MOD_URLEXT "=") - 1 );
1063                         mode_t p = 0;
1064                         int j;
1065
1066                         switch (strlen(value)) {
1067                         case 4:
1068                                 /* skip leading '0' */
1069                                 if ( value[ 0 ] != '0' ) return LDAP_OTHER;
1070                                 value++;
1071
1072                         case 3:
1073                                 for ( j = 0; j < 3; j++) {
1074                                         int     v;
1075
1076                                         v = value[ j ] - '0';
1077
1078                                         if ( v < 0 || v > 7 ) return LDAP_OTHER;
1079
1080                                         p |= v << 3*(2-j);
1081                                 }
1082                                 break;
1083
1084                         case 10:
1085                                 for ( j = 1; j < 10; j++ ) {
1086                                         static mode_t   m[] = { 0,
1087                                                 S_IRUSR, S_IWUSR, S_IXUSR,
1088                                                 S_IRGRP, S_IWGRP, S_IXGRP,
1089                                                 S_IROTH, S_IWOTH, S_IXOTH
1090                                         };
1091                                         static const char       c[] = "-rwxrwxrwx";
1092
1093                                         if ( value[ j ] == c[ j ] ) {
1094                                                 p |= m[ j ];
1095
1096                                         } else if ( value[ j ] != '-' ) {
1097                                                 return LDAP_OTHER;
1098                                         }
1099                                 }
1100                                 break;
1101
1102                         default:
1103                                 return LDAP_OTHER;
1104                         }
1105
1106                         *crit = c;
1107                         *perms = p;
1108
1109                         return LDAP_SUCCESS;
1110                 }
1111         }
1112
1113         return LDAP_OTHER;
1114 }
1115 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
1116
1117 /* port = 0 indicates AF_LOCAL */
1118 static int
1119 slap_get_listener_addresses(
1120         const char *host,
1121         unsigned short port,
1122         struct sockaddr ***sal )
1123 {
1124         struct sockaddr **sap;
1125
1126 #ifdef LDAP_PF_LOCAL
1127         if ( port == 0 ) {
1128                 *sal = ch_malloc(2 * sizeof(void *));
1129                 if (*sal == NULL) return -1;
1130
1131                 sap = *sal;
1132                 *sap = ch_malloc(sizeof(struct sockaddr_un));
1133                 if (*sap == NULL) goto errexit;
1134                 sap[1] = NULL;
1135
1136                 if ( strlen(host) >
1137                         (sizeof(((struct sockaddr_un *)*sap)->sun_path) - 1) )
1138                 {
1139                         Debug( LDAP_DEBUG_ANY,
1140                                 "daemon: domain socket path (%s) too long in URL",
1141                                 host, 0, 0);
1142                         goto errexit;
1143                 }
1144
1145                 (void)memset( (void *)*sap, '\0', sizeof(struct sockaddr_un) );
1146                 (*sap)->sa_family = AF_LOCAL;
1147                 strcpy( ((struct sockaddr_un *)*sap)->sun_path, host );
1148         } else
1149 #endif /* LDAP_PF_LOCAL */
1150         {
1151 #ifdef HAVE_GETADDRINFO
1152                 struct addrinfo hints, *res, *sai;
1153                 int n, err;
1154                 char serv[7];
1155
1156                 memset( &hints, '\0', sizeof(hints) );
1157                 hints.ai_flags = AI_PASSIVE;
1158                 hints.ai_socktype = SOCK_STREAM;
1159                 hints.ai_family = slap_inet4or6;
1160                 snprintf(serv, sizeof serv, "%d", port);
1161
1162                 if ( (err = getaddrinfo(host, serv, &hints, &res)) ) {
1163                         Debug( LDAP_DEBUG_ANY, "daemon: getaddrinfo() failed: %s\n",
1164                                 AC_GAI_STRERROR(err), 0, 0);
1165                         return -1;
1166                 }
1167
1168                 sai = res;
1169                 for (n=2; (sai = sai->ai_next) != NULL; n++) {
1170                         /* EMPTY */ ;
1171                 }
1172                 *sal = ch_calloc(n, sizeof(void *));
1173                 if (*sal == NULL) return -1;
1174
1175                 sap = *sal;
1176                 *sap = NULL;
1177
1178                 for ( sai=res; sai; sai=sai->ai_next ) {
1179                         if( sai->ai_addr == NULL ) {
1180                                 Debug( LDAP_DEBUG_ANY, "slap_get_listener_addresses: "
1181                                         "getaddrinfo ai_addr is NULL?\n", 0, 0, 0 );
1182                                 freeaddrinfo(res);
1183                                 goto errexit;
1184                         }
1185
1186                         switch (sai->ai_family) {
1187 #  ifdef LDAP_PF_INET6
1188                         case AF_INET6:
1189                                 *sap = ch_malloc(sizeof(struct sockaddr_in6));
1190                                 if (*sap == NULL) {
1191                                         freeaddrinfo(res);
1192                                         goto errexit;
1193                                 }
1194                                 *(struct sockaddr_in6 *)*sap =
1195                                         *((struct sockaddr_in6 *)sai->ai_addr);
1196                                 break;
1197 #  endif /* LDAP_PF_INET6 */
1198                         case AF_INET:
1199                                 *sap = ch_malloc(sizeof(struct sockaddr_in));
1200                                 if (*sap == NULL) {
1201                                         freeaddrinfo(res);
1202                                         goto errexit;
1203                                 }
1204                                 *(struct sockaddr_in *)*sap =
1205                                         *((struct sockaddr_in *)sai->ai_addr);
1206                                 break;
1207                         default:
1208                                 *sap = NULL;
1209                                 break;
1210                         }
1211
1212                         if (*sap != NULL) {
1213                                 (*sap)->sa_family = sai->ai_family;
1214                                 sap++;
1215                                 *sap = NULL;
1216                         }
1217                 }
1218
1219                 freeaddrinfo(res);
1220
1221 #else /* ! HAVE_GETADDRINFO */
1222                 int i, n = 1;
1223                 struct in_addr in;
1224                 struct hostent *he = NULL;
1225
1226                 if ( host == NULL ) {
1227                         in.s_addr = htonl(INADDR_ANY);
1228
1229                 } else if ( !inet_aton( host, &in ) ) {
1230                         he = gethostbyname( host );
1231                         if( he == NULL ) {
1232                                 Debug( LDAP_DEBUG_ANY,
1233                                         "daemon: invalid host %s", host, 0, 0);
1234                                 return -1;
1235                         }
1236                         for (n = 0; he->h_addr_list[n]; n++) /* empty */;
1237                 }
1238
1239                 *sal = ch_malloc((n+1) * sizeof(void *));
1240                 if (*sal == NULL) return -1;
1241
1242                 sap = *sal;
1243                 for ( i = 0; i<n; i++ ) {
1244                         sap[i] = ch_malloc(sizeof(struct sockaddr_in));
1245                         if (*sap == NULL) goto errexit;
1246
1247                         (void)memset( (void *)sap[i], '\0', sizeof(struct sockaddr_in) );
1248                         sap[i]->sa_family = AF_INET;
1249                         ((struct sockaddr_in *)sap[i])->sin_port = htons(port);
1250                         AC_MEMCPY( &((struct sockaddr_in *)sap[i])->sin_addr,
1251                                 he ? (struct in_addr *)he->h_addr_list[i] : &in,
1252                                 sizeof(struct in_addr) );
1253                 }
1254                 sap[i] = NULL;
1255 #endif /* ! HAVE_GETADDRINFO */
1256         }
1257
1258         return 0;
1259
1260 errexit:
1261         slap_free_listener_addresses(*sal);
1262         return -1;
1263 }
1264
1265 static int
1266 slap_open_listener(
1267         const char* url,
1268         int *listeners,
1269         int *cur )
1270 {
1271         int     num, tmp, rc;
1272         Listener l;
1273         Listener *li;
1274         LDAPURLDesc *lud;
1275         unsigned short port;
1276         int err, addrlen = 0;
1277         struct sockaddr **sal = NULL, **psal;
1278         int socktype = SOCK_STREAM;     /* default to COTS */
1279         ber_socket_t s;
1280
1281 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
1282         /*
1283          * use safe defaults
1284          */
1285         int     crit = 1;
1286 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
1287
1288         rc = ldap_url_parse( url, &lud );
1289
1290         if( rc != LDAP_URL_SUCCESS ) {
1291                 Debug( LDAP_DEBUG_ANY,
1292                         "daemon: listen URL \"%s\" parse error=%d\n",
1293                         url, rc, 0 );
1294                 return rc;
1295         }
1296
1297         l.sl_url.bv_val = NULL;
1298         l.sl_mute = 0;
1299         l.sl_busy = 0;
1300
1301 #ifndef HAVE_TLS
1302         if( ldap_pvt_url_scheme2tls( lud->lud_scheme ) ) {
1303                 Debug( LDAP_DEBUG_ANY, "daemon: TLS not supported (%s)\n",
1304                         url, 0, 0 );
1305                 ldap_free_urldesc( lud );
1306                 return -1;
1307         }
1308
1309         if(! lud->lud_port ) lud->lud_port = LDAP_PORT;
1310
1311 #else /* HAVE_TLS */
1312         l.sl_is_tls = ldap_pvt_url_scheme2tls( lud->lud_scheme );
1313
1314         if(! lud->lud_port ) {
1315                 lud->lud_port = l.sl_is_tls ? LDAPS_PORT : LDAP_PORT;
1316         }
1317 #endif /* HAVE_TLS */
1318
1319 #ifdef LDAP_TCP_BUFFER
1320         l.sl_tcp_rmem = 0;
1321         l.sl_tcp_wmem = 0;
1322 #endif /* LDAP_TCP_BUFFER */
1323
1324         port = (unsigned short) lud->lud_port;
1325
1326         tmp = ldap_pvt_url_scheme2proto(lud->lud_scheme);
1327         if ( tmp == LDAP_PROTO_IPC ) {
1328 #ifdef LDAP_PF_LOCAL
1329                 if ( lud->lud_host == NULL || lud->lud_host[0] == '\0' ) {
1330                         err = slap_get_listener_addresses(LDAPI_SOCK, 0, &sal);
1331                 } else {
1332                         err = slap_get_listener_addresses(lud->lud_host, 0, &sal);
1333                 }
1334 #else /* ! LDAP_PF_LOCAL */
1335
1336                 Debug( LDAP_DEBUG_ANY, "daemon: URL scheme not supported: %s",
1337                         url, 0, 0);
1338                 ldap_free_urldesc( lud );
1339                 return -1;
1340 #endif /* ! LDAP_PF_LOCAL */
1341         } else {
1342                 if( lud->lud_host == NULL || lud->lud_host[0] == '\0'
1343                         || strcmp(lud->lud_host, "*") == 0 )
1344                 {
1345                         err = slap_get_listener_addresses(NULL, port, &sal);
1346                 } else {
1347                         err = slap_get_listener_addresses(lud->lud_host, port, &sal);
1348                 }
1349         }
1350
1351 #ifdef LDAP_CONNECTIONLESS
1352         l.sl_is_udp = ( tmp == LDAP_PROTO_UDP );
1353 #endif /* LDAP_CONNECTIONLESS */
1354
1355 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
1356         if ( lud->lud_exts ) {
1357                 err = get_url_perms( lud->lud_exts, &l.sl_perms, &crit );
1358         } else {
1359                 l.sl_perms = S_IRWXU | S_IRWXO;
1360         }
1361 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
1362
1363         ldap_free_urldesc( lud );
1364         if ( err ) {
1365                 slap_free_listener_addresses(sal);
1366                 return -1;
1367         }
1368
1369         /* If we got more than one address returned, we need to make space
1370          * for it in the slap_listeners array.
1371          */
1372         for ( num=0; sal[num]; num++ ) /* empty */;
1373         if ( num > 1 ) {
1374                 *listeners += num-1;
1375                 slap_listeners = ch_realloc( slap_listeners,
1376                         (*listeners + 1) * sizeof(Listener *) );
1377         }
1378
1379         psal = sal;
1380         while ( *sal != NULL ) {
1381                 char *af;
1382                 switch( (*sal)->sa_family ) {
1383                 case AF_INET:
1384                         af = "IPv4";
1385                         break;
1386 #ifdef LDAP_PF_INET6
1387                 case AF_INET6:
1388                         af = "IPv6";
1389                         break;
1390 #endif /* LDAP_PF_INET6 */
1391 #ifdef LDAP_PF_LOCAL
1392                 case AF_LOCAL:
1393                         af = "Local";
1394                         break;
1395 #endif /* LDAP_PF_LOCAL */
1396                 default:
1397                         sal++;
1398                         continue;
1399                 }
1400
1401 #ifdef LDAP_CONNECTIONLESS
1402                 if( l.sl_is_udp ) socktype = SOCK_DGRAM;
1403 #endif /* LDAP_CONNECTIONLESS */
1404
1405                 s = socket( (*sal)->sa_family, socktype, 0);
1406                 if ( s == AC_SOCKET_INVALID ) {
1407                         int err = sock_errno();
1408                         Debug( LDAP_DEBUG_ANY,
1409                                 "daemon: %s socket() failed errno=%d (%s)\n",
1410                                 af, err, sock_errstr(err) );
1411                         sal++;
1412                         continue;
1413                 }
1414                 l.sl_sd = SLAP_SOCKNEW( s );
1415
1416                 if ( l.sl_sd >= dtblsize ) {
1417                         Debug( LDAP_DEBUG_ANY,
1418                                 "daemon: listener descriptor %ld is too great %ld\n",
1419                                 (long) l.sl_sd, (long) dtblsize, 0 );
1420                         tcp_close( s );
1421                         sal++;
1422                         continue;
1423                 }
1424
1425 #ifdef LDAP_PF_LOCAL
1426                 if ( (*sal)->sa_family == AF_LOCAL ) {
1427                         unlink( ((struct sockaddr_un *)*sal)->sun_path );
1428                 } else
1429 #endif /* LDAP_PF_LOCAL */
1430                 {
1431 #ifdef SO_REUSEADDR
1432                         /* enable address reuse */
1433                         tmp = 1;
1434                         rc = setsockopt( s, SOL_SOCKET, SO_REUSEADDR,
1435                                 (char *) &tmp, sizeof(tmp) );
1436                         if ( rc == AC_SOCKET_ERROR ) {
1437                                 int err = sock_errno();
1438                                 Debug( LDAP_DEBUG_ANY, "slapd(%ld): "
1439                                         "setsockopt(SO_REUSEADDR) failed errno=%d (%s)\n",
1440                                         (long) l.sl_sd, err, sock_errstr(err) );
1441                         }
1442 #endif /* SO_REUSEADDR */
1443                 }
1444
1445                 switch( (*sal)->sa_family ) {
1446                 case AF_INET:
1447                         addrlen = sizeof(struct sockaddr_in);
1448                         break;
1449 #ifdef LDAP_PF_INET6
1450                 case AF_INET6:
1451 #ifdef IPV6_V6ONLY
1452                         /* Try to use IPv6 sockets for IPv6 only */
1453                         tmp = 1;
1454                         rc = setsockopt( s , IPPROTO_IPV6, IPV6_V6ONLY,
1455                                 (char *) &tmp, sizeof(tmp) );
1456                         if ( rc == AC_SOCKET_ERROR ) {
1457                                 int err = sock_errno();
1458                                 Debug( LDAP_DEBUG_ANY, "slapd(%ld): "
1459                                         "setsockopt(IPV6_V6ONLY) failed errno=%d (%s)\n",
1460                                         (long) l.sl_sd, err, sock_errstr(err) );
1461                         }
1462 #endif /* IPV6_V6ONLY */
1463                         addrlen = sizeof(struct sockaddr_in6);
1464                         break;
1465 #endif /* LDAP_PF_INET6 */
1466
1467 #ifdef LDAP_PF_LOCAL
1468                 case AF_LOCAL:
1469 #ifdef LOCAL_CREDS
1470                         {
1471                                 int one = 1;
1472                                 setsockopt( s, 0, LOCAL_CREDS, &one, sizeof( one ) );
1473                         }
1474 #endif /* LOCAL_CREDS */
1475
1476                         addrlen = sizeof( struct sockaddr_un );
1477                         break;
1478 #endif /* LDAP_PF_LOCAL */
1479                 }
1480
1481 #ifdef LDAP_PF_LOCAL
1482                 /* create socket with all permissions set for those systems
1483                  * that honor permissions on sockets (e.g. Linux); typically,
1484                  * only write is required.  To exploit filesystem permissions,
1485                  * place the socket in a directory and use directory's
1486                  * permissions.  Need write perms to the directory to
1487                  * create/unlink the socket; likely need exec perms to access
1488                  * the socket (ITS#4709) */
1489                 {
1490                         mode_t old_umask = 0;
1491
1492                         if ( (*sal)->sa_family == AF_LOCAL ) {
1493                                 old_umask = umask( 0 );
1494                         }
1495 #endif /* LDAP_PF_LOCAL */
1496                         rc = bind( s, *sal, addrlen );
1497 #ifdef LDAP_PF_LOCAL
1498                         if ( old_umask != 0 ) {
1499                                 umask( old_umask );
1500                         }
1501                 }
1502 #endif /* LDAP_PF_LOCAL */
1503                 if ( rc ) {
1504                         err = sock_errno();
1505                         Debug( LDAP_DEBUG_ANY,
1506                                 "daemon: bind(%ld) failed errno=%d (%s)\n",
1507                                 (long)l.sl_sd, err, sock_errstr( err ) );
1508                         tcp_close( s );
1509                         sal++;
1510                         continue;
1511                 }
1512
1513                 switch ( (*sal)->sa_family ) {
1514 #ifdef LDAP_PF_LOCAL
1515                 case AF_LOCAL: {
1516                         char *path = ((struct sockaddr_un *)*sal)->sun_path;
1517                         l.sl_name.bv_len = strlen(path) + STRLENOF("PATH=");
1518                         l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len + 1 );
1519                         snprintf( l.sl_name.bv_val, l.sl_name.bv_len + 1,
1520                                 "PATH=%s", path );
1521                 } break;
1522 #endif /* LDAP_PF_LOCAL */
1523
1524                 case AF_INET: {
1525                         char addr[INET_ADDRSTRLEN];
1526                         const char *s;
1527 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
1528                         s = inet_ntop( AF_INET, &((struct sockaddr_in *)*sal)->sin_addr,
1529                                 addr, sizeof(addr) );
1530 #else /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1531                         s = inet_ntoa( ((struct sockaddr_in *) *sal)->sin_addr );
1532 #endif /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1533                         if (!s) s = SLAP_STRING_UNKNOWN;
1534                         port = ntohs( ((struct sockaddr_in *)*sal) ->sin_port );
1535                         l.sl_name.bv_val =
1536                                 ber_memalloc( sizeof("IP=255.255.255.255:65535") );
1537                         snprintf( l.sl_name.bv_val, sizeof("IP=255.255.255.255:65535"),
1538                                 "IP=%s:%d", s, port );
1539                         l.sl_name.bv_len = strlen( l.sl_name.bv_val );
1540                 } break;
1541
1542 #ifdef LDAP_PF_INET6
1543                 case AF_INET6: {
1544                         char addr[INET6_ADDRSTRLEN];
1545                         const char *s;
1546                         s = inet_ntop( AF_INET6, &((struct sockaddr_in6 *)*sal)->sin6_addr,
1547                                 addr, sizeof addr);
1548                         if (!s) s = SLAP_STRING_UNKNOWN;
1549                         port = ntohs( ((struct sockaddr_in6 *)*sal)->sin6_port );
1550                         l.sl_name.bv_len = strlen(s) + sizeof("IP=[]:65535");
1551                         l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len );
1552                         snprintf( l.sl_name.bv_val, l.sl_name.bv_len, "IP=[%s]:%d",
1553                                 s, port );
1554                         l.sl_name.bv_len = strlen( l.sl_name.bv_val );
1555                 } break;
1556 #endif /* LDAP_PF_INET6 */
1557
1558                 default:
1559                         Debug( LDAP_DEBUG_ANY, "daemon: unsupported address family (%d)\n",
1560                                 (int) (*sal)->sa_family, 0, 0 );
1561                         break;
1562                 }
1563
1564                 AC_MEMCPY(&l.sl_sa, *sal, addrlen);
1565                 ber_str2bv( url, 0, 1, &l.sl_url);
1566                 li = ch_malloc( sizeof( Listener ) );
1567                 *li = l;
1568                 slap_listeners[*cur] = li;
1569                 (*cur)++;
1570                 sal++;
1571         }
1572
1573         slap_free_listener_addresses(psal);
1574
1575         if ( l.sl_url.bv_val == NULL ) {
1576                 Debug( LDAP_DEBUG_TRACE,
1577                         "slap_open_listener: failed on %s\n", url, 0, 0 );
1578                 return -1;
1579         }
1580
1581         Debug( LDAP_DEBUG_TRACE, "daemon: listener initialized %s\n",
1582                 l.sl_url.bv_val, 0, 0 );
1583         return 0;
1584 }
1585
1586 static int sockinit(void);
1587 static int sockdestroy(void);
1588
1589 static int daemon_inited = 0;
1590
1591 int
1592 slapd_daemon_init( const char *urls )
1593 {
1594         int i, j, n, rc;
1595         char **u;
1596
1597         Debug( LDAP_DEBUG_ARGS, "daemon_init: %s\n",
1598                 urls ? urls : "<null>", 0, 0 );
1599
1600         for ( i=0; i<SLAPD_MAX_DAEMON_THREADS; i++ ) {
1601                 wake_sds[i][0] = AC_SOCKET_INVALID;
1602                 wake_sds[i][1] = AC_SOCKET_INVALID;
1603         }
1604
1605         ldap_pvt_thread_mutex_init( &slap_daemon[0].sd_mutex );
1606 #ifdef HAVE_TCPD
1607         ldap_pvt_thread_mutex_init( &sd_tcpd_mutex );
1608 #endif /* TCP Wrappers */
1609
1610         daemon_inited = 1;
1611
1612         if( (rc = sockinit()) != 0 ) return rc;
1613
1614 #ifdef HAVE_SYSCONF
1615         dtblsize = sysconf( _SC_OPEN_MAX );
1616 #elif defined(HAVE_GETDTABLESIZE)
1617         dtblsize = getdtablesize();
1618 #else /* ! HAVE_SYSCONF && ! HAVE_GETDTABLESIZE */
1619         dtblsize = FD_SETSIZE;
1620 #endif /* ! HAVE_SYSCONF && ! HAVE_GETDTABLESIZE */
1621
1622         /* open a pipe (or something equivalent connected to itself).
1623          * we write a byte on this fd whenever we catch a signal. The main
1624          * loop will be select'ing on this socket, and will wake up when
1625          * this byte arrives.
1626          */
1627         if( (rc = lutil_pair( wake_sds[0] )) < 0 ) {
1628                 Debug( LDAP_DEBUG_ANY,
1629                         "daemon: lutil_pair() failed rc=%d\n", rc, 0, 0 );
1630                 return rc;
1631         }
1632         ber_pvt_socket_set_nonblock( wake_sds[0][1], 1 );
1633
1634         SLAP_SOCK_INIT(0);
1635
1636         if( urls == NULL ) urls = "ldap:///";
1637
1638         u = ldap_str2charray( urls, " " );
1639
1640         if( u == NULL || u[0] == NULL ) {
1641                 Debug( LDAP_DEBUG_ANY, "daemon_init: no urls (%s) provided.\n",
1642                         urls, 0, 0 );
1643                 if ( u )
1644                         ldap_charray_free( u );
1645                 return -1;
1646         }
1647
1648         for( i=0; u[i] != NULL; i++ ) {
1649                 Debug( LDAP_DEBUG_TRACE, "daemon_init: listen on %s\n",
1650                         u[i], 0, 0 );
1651         }
1652
1653         if( i == 0 ) {
1654                 Debug( LDAP_DEBUG_ANY, "daemon_init: no listeners to open (%s)\n",
1655                         urls, 0, 0 );
1656                 ldap_charray_free( u );
1657                 return -1;
1658         }
1659
1660         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners to open...\n",
1661                 i, 0, 0 );
1662         slap_listeners = ch_malloc( (i+1)*sizeof(Listener *) );
1663
1664         for(n = 0, j = 0; u[n]; n++ ) {
1665                 if ( slap_open_listener( u[n], &i, &j ) ) {
1666                         ldap_charray_free( u );
1667                         return -1;
1668                 }
1669         }
1670         slap_listeners[j] = NULL;
1671
1672         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners opened\n",
1673                 i, 0, 0 );
1674
1675
1676 #ifdef HAVE_SLP
1677         if( slapd_register_slp ) {
1678                 slapd_slp_init( urls );
1679                 slapd_slp_reg();
1680         }
1681 #endif /* HAVE_SLP */
1682
1683         ldap_charray_free( u );
1684
1685         return !i;
1686 }
1687
1688
1689 int
1690 slapd_daemon_destroy( void )
1691 {
1692         connections_destroy();
1693         if ( daemon_inited ) {
1694                 int i;
1695
1696                 for ( i=0; i<slapd_daemon_threads; i++ ) {
1697 #ifdef HAVE_WINSOCK
1698                         if ( wake_sds[i][1] != INVALID_SOCKET &&
1699                                 SLAP_FD2SOCK( wake_sds[i][1] ) != SLAP_FD2SOCK( wake_sds[i][0] ))
1700 #endif /* HAVE_WINSOCK */
1701                                 tcp_close( SLAP_FD2SOCK(wake_sds[i][1]) );
1702 #ifdef HAVE_WINSOCK
1703                         if ( wake_sds[i][0] != INVALID_SOCKET )
1704 #endif /* HAVE_WINSOCK */
1705                                 tcp_close( SLAP_FD2SOCK(wake_sds[i][0]) );
1706                         ldap_pvt_thread_mutex_destroy( &slap_daemon[i].sd_mutex );
1707                         SLAP_SOCK_DESTROY(i);
1708                 }
1709                 daemon_inited = 0;
1710 #ifdef HAVE_TCPD
1711                 ldap_pvt_thread_mutex_destroy( &sd_tcpd_mutex );
1712 #endif /* TCP Wrappers */
1713         }
1714         sockdestroy();
1715
1716 #ifdef HAVE_SLP
1717         if( slapd_register_slp ) {
1718                 slapd_slp_dereg();
1719                 slapd_slp_deinit();
1720         }
1721 #endif /* HAVE_SLP */
1722
1723         return 0;
1724 }
1725
1726
1727 static void
1728 close_listeners(
1729         int remove )
1730 {
1731         int l;
1732
1733         if ( !listening )
1734                 return;
1735         listening = 0;
1736
1737         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1738                 Listener *lr = slap_listeners[l];
1739
1740                 if ( lr->sl_sd != AC_SOCKET_INVALID ) {
1741                         int s = lr->sl_sd;
1742                         lr->sl_sd = AC_SOCKET_INVALID;
1743                         if ( remove ) slapd_remove( s, NULL, 0, 0, 0 );
1744
1745 #ifdef LDAP_PF_LOCAL
1746                         if ( lr->sl_sa.sa_addr.sa_family == AF_LOCAL ) {
1747                                 unlink( lr->sl_sa.sa_un_addr.sun_path );
1748                         }
1749 #endif /* LDAP_PF_LOCAL */
1750
1751                         slapd_close( s );
1752                 }
1753         }
1754 }
1755
1756 static void
1757 destroy_listeners( void )
1758 {
1759         Listener *lr, **ll = slap_listeners;
1760
1761         if ( ll == NULL )
1762                 return;
1763
1764         while ( (lr = *ll++) != NULL ) {
1765                 if ( lr->sl_url.bv_val ) {
1766                         ber_memfree( lr->sl_url.bv_val );
1767                 }
1768
1769                 if ( lr->sl_name.bv_val ) {
1770                         ber_memfree( lr->sl_name.bv_val );
1771                 }
1772
1773                 free( lr );
1774         }
1775
1776         free( slap_listeners );
1777         slap_listeners = NULL;
1778 }
1779
1780 static int
1781 slap_listener(
1782         Listener *sl )
1783 {
1784         Sockaddr                from;
1785
1786         ber_socket_t s, sfd;
1787         ber_socklen_t len = sizeof(from);
1788         Connection *c;
1789         slap_ssf_t ssf = 0;
1790         struct berval authid = BER_BVNULL;
1791 #ifdef SLAPD_RLOOKUPS
1792         char hbuf[NI_MAXHOST];
1793 #endif /* SLAPD_RLOOKUPS */
1794
1795         char    *dnsname = NULL;
1796         const char *peeraddr = NULL;
1797         /* we assume INET6_ADDRSTRLEN > INET_ADDRSTRLEN */
1798         char addr[INET6_ADDRSTRLEN];
1799 #ifdef LDAP_PF_LOCAL
1800         char peername[MAXPATHLEN + sizeof("PATH=")];
1801 #ifdef LDAP_PF_LOCAL_SENDMSG
1802         char peerbuf[8];
1803         struct berval peerbv = BER_BVNULL;
1804 #endif
1805 #elif defined(LDAP_PF_INET6)
1806         char peername[sizeof("IP=[ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff]:65535")];
1807 #else /* ! LDAP_PF_LOCAL && ! LDAP_PF_INET6 */
1808         char peername[sizeof("IP=255.255.255.255:65336")];
1809 #endif /* LDAP_PF_LOCAL */
1810         int cflag;
1811         int tid;
1812
1813         Debug( LDAP_DEBUG_TRACE,
1814                 ">>> slap_listener(%s)\n",
1815                 sl->sl_url.bv_val, 0, 0 );
1816
1817         peername[0] = '\0';
1818
1819 #ifdef LDAP_CONNECTIONLESS
1820         if ( sl->sl_is_udp ) return 1;
1821 #endif /* LDAP_CONNECTIONLESS */
1822
1823 #  ifdef LDAP_PF_LOCAL
1824         /* FIXME: apparently accept doesn't fill
1825          * the sun_path sun_path member */
1826         from.sa_un_addr.sun_path[0] = '\0';
1827 #  endif /* LDAP_PF_LOCAL */
1828
1829         s = accept( SLAP_FD2SOCK( sl->sl_sd ), (struct sockaddr *) &from, &len );
1830
1831         /* Resume the listener FD to allow concurrent-processing of
1832          * additional incoming connections.
1833          */
1834         sl->sl_busy = 0;
1835         WAKE_LISTENER(DAEMON_ID(sl->sl_sd),1);
1836
1837         if ( s == AC_SOCKET_INVALID ) {
1838                 int err = sock_errno();
1839
1840                 if(
1841 #ifdef EMFILE
1842                     err == EMFILE ||
1843 #endif /* EMFILE */
1844 #ifdef ENFILE
1845                     err == ENFILE ||
1846 #endif /* ENFILE */
1847                     0 )
1848                 {
1849                         ldap_pvt_thread_mutex_lock( &slap_daemon[0].sd_mutex );
1850                         emfile++;
1851                         /* Stop listening until an existing session closes */
1852                         sl->sl_mute = 1;
1853                         ldap_pvt_thread_mutex_unlock( &slap_daemon[0].sd_mutex );
1854                 }
1855
1856                 Debug( LDAP_DEBUG_ANY,
1857                         "daemon: accept(%ld) failed errno=%d (%s)\n",
1858                         (long) sl->sl_sd, err, sock_errstr(err) );
1859                 ldap_pvt_thread_yield();
1860                 return 0;
1861         }
1862         sfd = SLAP_SOCKNEW( s );
1863
1864         /* make sure descriptor number isn't too great */
1865         if ( sfd >= dtblsize ) {
1866                 Debug( LDAP_DEBUG_ANY,
1867                         "daemon: %ld beyond descriptor table size %ld\n",
1868                         (long) sfd, (long) dtblsize, 0 );
1869
1870                 tcp_close(s);
1871                 ldap_pvt_thread_yield();
1872                 return 0;
1873         }
1874         tid = DAEMON_ID(sfd);
1875
1876 #ifdef LDAP_DEBUG
1877         ldap_pvt_thread_mutex_lock( &slap_daemon[tid].sd_mutex );
1878         /* newly accepted stream should not be in any of the FD SETS */
1879         assert( SLAP_SOCK_NOT_ACTIVE( tid, sfd ));
1880         ldap_pvt_thread_mutex_unlock( &slap_daemon[tid].sd_mutex );
1881 #endif /* LDAP_DEBUG */
1882
1883 #if defined( SO_KEEPALIVE ) || defined( TCP_NODELAY )
1884 #ifdef LDAP_PF_LOCAL
1885         /* for IPv4 and IPv6 sockets only */
1886         if ( from.sa_addr.sa_family != AF_LOCAL )
1887 #endif /* LDAP_PF_LOCAL */
1888         {
1889                 int rc;
1890                 int tmp;
1891 #ifdef SO_KEEPALIVE
1892                 /* enable keep alives */
1893                 tmp = 1;
1894                 rc = setsockopt( s, SOL_SOCKET, SO_KEEPALIVE,
1895                         (char *) &tmp, sizeof(tmp) );
1896                 if ( rc == AC_SOCKET_ERROR ) {
1897                         int err = sock_errno();
1898                         Debug( LDAP_DEBUG_ANY,
1899                                 "slapd(%ld): setsockopt(SO_KEEPALIVE) failed "
1900                                 "errno=%d (%s)\n", (long) sfd, err, sock_errstr(err) );
1901                 }
1902 #endif /* SO_KEEPALIVE */
1903 #ifdef TCP_NODELAY
1904                 /* enable no delay */
1905                 tmp = 1;
1906                 rc = setsockopt( s, IPPROTO_TCP, TCP_NODELAY,
1907                         (char *)&tmp, sizeof(tmp) );
1908                 if ( rc == AC_SOCKET_ERROR ) {
1909                         int err = sock_errno();
1910                         Debug( LDAP_DEBUG_ANY,
1911                                 "slapd(%ld): setsockopt(TCP_NODELAY) failed "
1912                                 "errno=%d (%s)\n", (long) sfd, err, sock_errstr(err) );
1913                 }
1914 #endif /* TCP_NODELAY */
1915         }
1916 #endif /* SO_KEEPALIVE || TCP_NODELAY */
1917
1918         Debug( LDAP_DEBUG_CONNS,
1919                 "daemon: listen=%ld, new connection on %ld\n",
1920                 (long) sl->sl_sd, (long) sfd, 0 );
1921
1922         cflag = 0;
1923         switch ( from.sa_addr.sa_family ) {
1924 #  ifdef LDAP_PF_LOCAL
1925         case AF_LOCAL:
1926                 cflag |= CONN_IS_IPC;
1927
1928                 /* FIXME: apparently accept doesn't fill
1929                  * the sun_path sun_path member */
1930                 if ( from.sa_un_addr.sun_path[0] == '\0' ) {
1931                         AC_MEMCPY( from.sa_un_addr.sun_path,
1932                                         sl->sl_sa.sa_un_addr.sun_path,
1933                                         sizeof( from.sa_un_addr.sun_path ) );
1934                 }
1935
1936                 sprintf( peername, "PATH=%s", from.sa_un_addr.sun_path );
1937                 ssf = local_ssf;
1938                 {
1939                         uid_t uid;
1940                         gid_t gid;
1941
1942 #ifdef LDAP_PF_LOCAL_SENDMSG
1943                         peerbv.bv_val = peerbuf;
1944                         peerbv.bv_len = sizeof( peerbuf );
1945 #endif
1946                         if( LUTIL_GETPEEREID( s, &uid, &gid, &peerbv ) == 0 ) {
1947                                 authid.bv_val = ch_malloc(
1948                                         STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
1949                                         "cn=peercred,cn=external,cn=auth" ) + 1 );
1950                                 authid.bv_len = sprintf( authid.bv_val,
1951                                         "gidNumber=%d+uidNumber=%d,"
1952                                         "cn=peercred,cn=external,cn=auth",
1953                                         (int) gid, (int) uid );
1954                                 assert( authid.bv_len <=
1955                                         STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
1956                                         "cn=peercred,cn=external,cn=auth" ) );
1957                         }
1958                 }
1959                 dnsname = "local";
1960                 break;
1961 #endif /* LDAP_PF_LOCAL */
1962
1963 #  ifdef LDAP_PF_INET6
1964         case AF_INET6:
1965         if ( IN6_IS_ADDR_V4MAPPED(&from.sa_in6_addr.sin6_addr) ) {
1966 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
1967                 peeraddr = inet_ntop( AF_INET,
1968                            ((struct in_addr *)&from.sa_in6_addr.sin6_addr.s6_addr[12]),
1969                            addr, sizeof(addr) );
1970 #else /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1971                 peeraddr = inet_ntoa( *((struct in_addr *)
1972                                         &from.sa_in6_addr.sin6_addr.s6_addr[12]) );
1973 #endif /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1974                 if ( !peeraddr ) peeraddr = SLAP_STRING_UNKNOWN;
1975                 sprintf( peername, "IP=%s:%d", peeraddr,
1976                          (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
1977         } else {
1978                 peeraddr = inet_ntop( AF_INET6,
1979                                       &from.sa_in6_addr.sin6_addr,
1980                                       addr, sizeof addr );
1981                 if ( !peeraddr ) peeraddr = SLAP_STRING_UNKNOWN;
1982                 sprintf( peername, "IP=[%s]:%d", peeraddr,
1983                          (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
1984         }
1985         break;
1986 #  endif /* LDAP_PF_INET6 */
1987
1988         case AF_INET: {
1989 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
1990                 peeraddr = inet_ntop( AF_INET, &from.sa_in_addr.sin_addr,
1991                            addr, sizeof(addr) );
1992 #else /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1993                 peeraddr = inet_ntoa( from.sa_in_addr.sin_addr );
1994 #endif /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1995                 if ( !peeraddr ) peeraddr = SLAP_STRING_UNKNOWN;
1996                 sprintf( peername, "IP=%s:%d", peeraddr,
1997                         (unsigned) ntohs( from.sa_in_addr.sin_port ) );
1998                 } break;
1999
2000         default:
2001                 slapd_close(sfd);
2002                 return 0;
2003         }
2004
2005         if ( ( from.sa_addr.sa_family == AF_INET )
2006 #ifdef LDAP_PF_INET6
2007                 || ( from.sa_addr.sa_family == AF_INET6 )
2008 #endif /* LDAP_PF_INET6 */
2009                 )
2010         {
2011                 dnsname = NULL;
2012 #ifdef SLAPD_RLOOKUPS
2013                 if ( use_reverse_lookup ) {
2014                         char *herr;
2015                         if (ldap_pvt_get_hname( (const struct sockaddr *)&from, len, hbuf,
2016                                 sizeof(hbuf), &herr ) == 0) {
2017                                 ldap_pvt_str2lower( hbuf );
2018                                 dnsname = hbuf;
2019                         }
2020                 }
2021 #endif /* SLAPD_RLOOKUPS */
2022
2023 #ifdef HAVE_TCPD
2024                 {
2025                         int rc;
2026                         ldap_pvt_thread_mutex_lock( &sd_tcpd_mutex );
2027                         rc = hosts_ctl("slapd",
2028                                 dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
2029                                 peeraddr,
2030                                 SLAP_STRING_UNKNOWN );
2031                         ldap_pvt_thread_mutex_unlock( &sd_tcpd_mutex );
2032                         if ( !rc ) {
2033                                 /* DENY ACCESS */
2034                                 Statslog( LDAP_DEBUG_STATS,
2035                                         "fd=%ld DENIED from %s (%s)\n",
2036                                         (long) sfd,
2037                                         dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
2038                                         peeraddr, 0, 0 );
2039                                 slapd_close(sfd);
2040                                 return 0;
2041                         }
2042                 }
2043 #endif /* HAVE_TCPD */
2044         }
2045
2046 #ifdef HAVE_TLS
2047         if ( sl->sl_is_tls ) cflag |= CONN_IS_TLS;
2048 #endif
2049         c = connection_init(sfd, sl,
2050                 dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
2051                 peername, cflag, ssf,
2052                 authid.bv_val ? &authid : NULL
2053                 LDAP_PF_LOCAL_SENDMSG_ARG(&peerbv));
2054
2055         if( authid.bv_val ) ch_free(authid.bv_val);
2056
2057         if( !c ) {
2058                 Debug( LDAP_DEBUG_ANY,
2059                         "daemon: connection_init(%ld, %s, %s) failed.\n",
2060                         (long) sfd, peername, sl->sl_name.bv_val );
2061                 slapd_close(sfd);
2062         }
2063
2064         return 0;
2065 }
2066
2067 static void*
2068 slap_listener_thread(
2069         void* ctx,
2070         void* ptr )
2071 {
2072         int             rc;
2073         Listener        *sl = (Listener *)ptr;
2074
2075         rc = slap_listener( sl );
2076
2077         if( rc != LDAP_SUCCESS ) {
2078                 Debug( LDAP_DEBUG_ANY,
2079                         "slap_listener_thread(%s): failed err=%d",
2080                         sl->sl_url.bv_val, rc, 0 );
2081         }
2082
2083         return (void*)NULL;
2084 }
2085
2086 static int
2087 slap_listener_activate(
2088         Listener* sl )
2089 {
2090         int rc;
2091
2092         Debug( LDAP_DEBUG_TRACE, "slap_listener_activate(%d): %s\n",
2093                 sl->sl_sd, sl->sl_busy ? "busy" : "", 0 );
2094
2095         sl->sl_busy = 1;
2096
2097         rc = ldap_pvt_thread_pool_submit( &connection_pool,
2098                 slap_listener_thread, (void *) sl );
2099
2100         if( rc != 0 ) {
2101                 Debug( LDAP_DEBUG_ANY,
2102                         "slap_listener_activate(%d): submit failed (%d)\n",
2103                         sl->sl_sd, rc, 0 );
2104         }
2105         return rc;
2106 }
2107
2108 static void *
2109 slapd_daemon_task(
2110         void *ptr )
2111 {
2112         int l;
2113         time_t last_idle_check = 0;
2114         int ebadf = 0;
2115         int tid = (ldap_pvt_thread_t *) ptr - listener_tid;
2116
2117 #define SLAPD_IDLE_CHECK_LIMIT 4
2118
2119         slapd_add( wake_sds[tid][0], 0, NULL, tid );
2120         if ( tid )
2121                 goto loop;
2122
2123         /* Init stuff done only by thread 0 */
2124
2125         last_idle_check = slap_get_time();
2126
2127         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2128                 if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) continue;
2129
2130 #ifdef LDAP_CONNECTIONLESS
2131                 /* Since this is connectionless, the data port is the
2132                  * listening port. The listen() and accept() calls
2133                  * are unnecessary.
2134                  */
2135                 if ( slap_listeners[l]->sl_is_udp )
2136                         continue;
2137 #endif /* LDAP_CONNECTIONLESS */
2138
2139                 /* FIXME: TCP-only! */
2140 #ifdef LDAP_TCP_BUFFER
2141                 if ( 1 ) {
2142                         int origsize, size, realsize, rc;
2143                         socklen_t optlen;
2144                         char buf[ SLAP_TEXT_BUFLEN ];
2145
2146                         size = 0;
2147                         if ( slap_listeners[l]->sl_tcp_rmem > 0 ) {
2148                                 size = slap_listeners[l]->sl_tcp_rmem;
2149                         } else if ( slapd_tcp_rmem > 0 ) {
2150                                 size = slapd_tcp_rmem;
2151                         }
2152
2153                         if ( size > 0 ) {
2154                                 optlen = sizeof( origsize );
2155                                 rc = getsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
2156                                         SOL_SOCKET,
2157                                         SO_RCVBUF,
2158                                         (void *)&origsize,
2159                                         &optlen );
2160
2161                                 if ( rc ) {
2162                                         int err = sock_errno();
2163                                         Debug( LDAP_DEBUG_ANY,
2164                                                 "slapd_daemon_task: getsockopt(SO_RCVBUF) failed errno=%d (%s)\n",
2165                                                 err, sock_errstr(err), 0 );
2166                                 }
2167
2168                                 optlen = sizeof( size );
2169                                 rc = setsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
2170                                         SOL_SOCKET,
2171                                         SO_RCVBUF,
2172                                         (const void *)&size,
2173                                         optlen );
2174
2175                                 if ( rc ) {
2176                                         int err = sock_errno();
2177                                         Debug( LDAP_DEBUG_ANY,
2178                                                 "slapd_daemon_task: setsockopt(SO_RCVBUF) failed errno=%d (%s)\n",
2179                                                 err, sock_errstr(err), 0 );
2180                                 }
2181
2182                                 optlen = sizeof( realsize );
2183                                 rc = getsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
2184                                         SOL_SOCKET,
2185                                         SO_RCVBUF,
2186                                         (void *)&realsize,
2187                                         &optlen );
2188
2189                                 if ( rc ) {
2190                                         int err = sock_errno();
2191                                         Debug( LDAP_DEBUG_ANY,
2192                                                 "slapd_daemon_task: getsockopt(SO_RCVBUF) failed errno=%d (%s)\n",
2193                                                 err, sock_errstr(err), 0 );
2194                                 }
2195
2196                                 snprintf( buf, sizeof( buf ),
2197                                         "url=%s (#%d) RCVBUF original size=%d requested size=%d real size=%d",
2198                                         slap_listeners[l]->sl_url.bv_val, l, origsize, size, realsize );
2199                                 Debug( LDAP_DEBUG_ANY,
2200                                         "slapd_daemon_task: %s\n",
2201                                         buf, 0, 0 );
2202                         }
2203
2204                         size = 0;
2205                         if ( slap_listeners[l]->sl_tcp_wmem > 0 ) {
2206                                 size = slap_listeners[l]->sl_tcp_wmem;
2207                         } else if ( slapd_tcp_wmem > 0 ) {
2208                                 size = slapd_tcp_wmem;
2209                         }
2210
2211                         if ( size > 0 ) {
2212                                 optlen = sizeof( origsize );
2213                                 rc = getsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
2214                                         SOL_SOCKET,
2215                                         SO_SNDBUF,
2216                                         (void *)&origsize,
2217                                         &optlen );
2218
2219                                 if ( rc ) {
2220                                         int err = sock_errno();
2221                                         Debug( LDAP_DEBUG_ANY,
2222                                                 "slapd_daemon_task: getsockopt(SO_SNDBUF) failed errno=%d (%s)\n",
2223                                                 err, sock_errstr(err), 0 );
2224                                 }
2225
2226                                 optlen = sizeof( size );
2227                                 rc = setsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
2228                                         SOL_SOCKET,
2229                                         SO_SNDBUF,
2230                                         (const void *)&size,
2231                                         optlen );
2232
2233                                 if ( rc ) {
2234                                         int err = sock_errno();
2235                                         Debug( LDAP_DEBUG_ANY,
2236                                                 "slapd_daemon_task: setsockopt(SO_SNDBUF) failed errno=%d (%s)",
2237                                                 err, sock_errstr(err), 0 );
2238                                 }
2239
2240                                 optlen = sizeof( realsize );
2241                                 rc = getsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
2242                                         SOL_SOCKET,
2243                                         SO_SNDBUF,
2244                                         (void *)&realsize,
2245                                         &optlen );
2246
2247                                 if ( rc ) {
2248                                         int err = sock_errno();
2249                                         Debug( LDAP_DEBUG_ANY,
2250                                                 "slapd_daemon_task: getsockopt(SO_SNDBUF) failed errno=%d (%s)\n",
2251                                                 err, sock_errstr(err), 0 );
2252                                 }
2253
2254                                 snprintf( buf, sizeof( buf ),
2255                                         "url=%s (#%d) SNDBUF original size=%d requested size=%d real size=%d",
2256                                         slap_listeners[l]->sl_url.bv_val, l, origsize, size, realsize );
2257                                 Debug( LDAP_DEBUG_ANY,
2258                                         "slapd_daemon_task: %s\n",
2259                                         buf, 0, 0 );
2260                         }
2261                 }
2262 #endif /* LDAP_TCP_BUFFER */
2263
2264                 if ( listen( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ), SLAPD_LISTEN_BACKLOG ) == -1 ) {
2265                         int err = sock_errno();
2266
2267 #ifdef LDAP_PF_INET6
2268                         /* If error is EADDRINUSE, we are trying to listen to INADDR_ANY and
2269                          * we are already listening to in6addr_any, then we want to ignore
2270                          * this and continue.
2271                          */
2272                         if ( err == EADDRINUSE ) {
2273                                 int i;
2274                                 struct sockaddr_in sa = slap_listeners[l]->sl_sa.sa_in_addr;
2275                                 struct sockaddr_in6 sa6;
2276
2277                                 if ( sa.sin_family == AF_INET &&
2278                                      sa.sin_addr.s_addr == htonl(INADDR_ANY) ) {
2279                                         for ( i = 0 ; i < l; i++ ) {
2280                                                 sa6 = slap_listeners[i]->sl_sa.sa_in6_addr;
2281                                                 if ( sa6.sin6_family == AF_INET6 &&
2282                                                      !memcmp( &sa6.sin6_addr, &in6addr_any,
2283                                                                 sizeof(struct in6_addr) ) )
2284                                                 {
2285                                                         break;
2286                                                 }
2287                                         }
2288
2289                                         if ( i < l ) {
2290                                                 /* We are already listening to in6addr_any */
2291                                                 Debug( LDAP_DEBUG_CONNS,
2292                                                         "daemon: Attempt to listen to 0.0.0.0 failed, "
2293                                                         "already listening on ::, assuming IPv4 included\n",
2294                                                         0, 0, 0 );
2295                                                 slapd_close( slap_listeners[l]->sl_sd );
2296                                                 slap_listeners[l]->sl_sd = AC_SOCKET_INVALID;
2297                                                 continue;
2298                                         }
2299                                 }
2300                         }
2301 #endif /* LDAP_PF_INET6 */
2302                         Debug( LDAP_DEBUG_ANY,
2303                                 "daemon: listen(%s, 5) failed errno=%d (%s)\n",
2304                                         slap_listeners[l]->sl_url.bv_val, err,
2305                                         sock_errstr(err) );
2306                         return (void*)-1;
2307                 }
2308
2309                 /* make the listening socket non-blocking */
2310                 if ( ber_pvt_socket_set_nonblock( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ), 1 ) < 0 ) {
2311                         Debug( LDAP_DEBUG_ANY, "slapd_daemon_task: "
2312                                 "set nonblocking on a listening socket failed\n",
2313                                 0, 0, 0 );
2314                         slapd_shutdown = 2;
2315                         return (void*)-1;
2316                 }
2317
2318                 slapd_add( slap_listeners[l]->sl_sd, 0, slap_listeners[l], -1 );
2319         }
2320
2321 #ifdef HAVE_NT_SERVICE_MANAGER
2322         if ( started_event != NULL ) {
2323                 ldap_pvt_thread_cond_signal( &started_event );
2324         }
2325 #endif /* HAVE_NT_SERVICE_MANAGER */
2326
2327 loop:
2328
2329         /* initialization complete. Here comes the loop. */
2330
2331         while ( !slapd_shutdown ) {
2332                 ber_socket_t            i;
2333                 int                     ns, nwriters;
2334                 int                     at;
2335                 ber_socket_t            nfds;
2336 #if SLAP_EVENTS_ARE_INDEXED
2337                 ber_socket_t            nrfds, nwfds;
2338 #endif /* SLAP_EVENTS_ARE_INDEXED */
2339 #define SLAPD_EBADF_LIMIT 16
2340
2341                 time_t                  now;
2342
2343                 SLAP_EVENT_DECL;
2344
2345                 struct timeval          tv;
2346                 struct timeval          *tvp;
2347
2348                 struct timeval          cat;
2349                 time_t                  tdelta = 1;
2350                 struct re_s*            rtask;
2351
2352                 now = slap_get_time();
2353
2354                 if ( !tid && ( global_idletimeout > 0 )) {
2355                         int check = 0;
2356                         /* Set the select timeout.
2357                          * Don't just truncate, preserve the fractions of
2358                          * seconds to prevent sleeping for zero time.
2359                          */
2360                         {
2361                                 tv.tv_sec = global_idletimeout / SLAPD_IDLE_CHECK_LIMIT;
2362                                 tv.tv_usec = global_idletimeout - \
2363                                         ( tv.tv_sec * SLAPD_IDLE_CHECK_LIMIT );
2364                                 tv.tv_usec *= 1000000 / SLAPD_IDLE_CHECK_LIMIT;
2365                                 if ( difftime( last_idle_check +
2366                                         global_idletimeout/SLAPD_IDLE_CHECK_LIMIT, now ) < 0 )
2367                                         check = 1;
2368                         }
2369                         if ( check ) {
2370                                 connections_timeout_idle( now );
2371                                 last_idle_check = now;
2372                         }
2373                 } else {
2374                         tv.tv_sec = 0;
2375                         tv.tv_usec = 0;
2376                 }
2377
2378 #ifdef SIGHUP
2379                 if ( slapd_gentle_shutdown ) {
2380                         ber_socket_t active;
2381
2382                         if ( !tid && slapd_gentle_shutdown == 1 ) {
2383                                 BackendDB *be;
2384                                 Debug( LDAP_DEBUG_ANY, "slapd gentle shutdown\n", 0, 0, 0 );
2385                                 close_listeners( 1 );
2386                                 frontendDB->be_restrictops |= SLAP_RESTRICT_OP_WRITES;
2387                                 LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
2388                                         be->be_restrictops |= SLAP_RESTRICT_OP_WRITES;
2389                                 }
2390                                 slapd_gentle_shutdown = 2;
2391                         }
2392
2393                         ldap_pvt_thread_mutex_lock( &slap_daemon[tid].sd_mutex );
2394                         active = slap_daemon[tid].sd_nactives;
2395                         ldap_pvt_thread_mutex_unlock( &slap_daemon[tid].sd_mutex );
2396
2397                         if ( active == 0 ) {
2398                                 if ( !tid ) {
2399                                         for ( l=1; l<slapd_daemon_threads; l++ ) {
2400                                                 ldap_pvt_thread_mutex_lock( &slap_daemon[l].sd_mutex );
2401                                                 active += slap_daemon[l].sd_nactives;
2402                                                 ldap_pvt_thread_mutex_unlock( &slap_daemon[l].sd_mutex );
2403                                         }
2404                                         if ( !active )
2405                                                 slapd_shutdown = 1;
2406                                 }
2407                                 if ( !active )
2408                                         break;
2409                         }
2410                 }
2411 #endif /* SIGHUP */
2412                 at = 0;
2413
2414                 ldap_pvt_thread_mutex_lock( &slap_daemon[tid].sd_mutex );
2415
2416                 nwriters = slap_daemon[tid].sd_nwriters;
2417
2418                 if ( listening )
2419                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2420                         Listener *lr = slap_listeners[l];
2421
2422                         if ( lr->sl_sd == AC_SOCKET_INVALID ) continue;
2423                         if ( DAEMON_ID( lr->sl_sd ) != tid ) continue;
2424                         if ( !SLAP_SOCK_IS_ACTIVE( tid, lr->sl_sd )) continue;
2425
2426                         if ( lr->sl_mute || lr->sl_busy )
2427                         {
2428                                 SLAP_SOCK_CLR_READ( tid, lr->sl_sd );
2429                         } else {
2430                                 SLAP_SOCK_SET_READ( tid, lr->sl_sd );
2431                         }
2432                 }
2433
2434                 SLAP_EVENT_INIT(tid);
2435
2436                 nfds = SLAP_EVENT_MAX(tid);
2437
2438                 if (( global_idletimeout ) && slap_daemon[tid].sd_nactives ) at = 1;
2439
2440                 ldap_pvt_thread_mutex_unlock( &slap_daemon[tid].sd_mutex );
2441
2442                 if ( at
2443 #if defined(HAVE_YIELDING_SELECT) || defined(NO_THREADS)
2444                         &&  ( tv.tv_sec || tv.tv_usec )
2445 #endif /* HAVE_YIELDING_SELECT || NO_THREADS */
2446                         )
2447                 {
2448                         tvp = &tv;
2449                 } else {
2450                         tvp = NULL;
2451                 }
2452
2453                 /* Only thread 0 handles runqueue */
2454                 if ( !tid ) {
2455                         ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
2456                         rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
2457                         while ( rtask && cat.tv_sec && cat.tv_sec <= now ) {
2458                                 if ( ldap_pvt_runqueue_isrunning( &slapd_rq, rtask )) {
2459                                         ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
2460                                 } else {
2461                                         ldap_pvt_runqueue_runtask( &slapd_rq, rtask );
2462                                         ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
2463                                         ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
2464                                         ldap_pvt_thread_pool_submit2( &connection_pool,
2465                                                 rtask->routine, (void *) rtask, &rtask->pool_cookie );
2466                                         ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
2467                                 }
2468                                 rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
2469                         }
2470                         ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
2471
2472                         if ( rtask && cat.tv_sec ) {
2473                                 /* NOTE: diff __should__ always be >= 0,
2474                                  * AFAI understand; however (ITS#4872),
2475                                  * time_t might be unsigned in some systems,
2476                                  * while difftime() returns a double */
2477                                 double diff = difftime( cat.tv_sec, now );
2478                                 if ( diff <= 0 ) {
2479                                         diff = tdelta;
2480                                 }
2481                                 if ( tvp == NULL || diff < tv.tv_sec ) {
2482                                         tv.tv_sec = diff;
2483                                         tv.tv_usec = 0;
2484                                         tvp = &tv;
2485                                 }
2486                         }
2487                 }
2488
2489                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2490                         Listener *lr = slap_listeners[l];
2491
2492                         if ( lr->sl_sd == AC_SOCKET_INVALID ) {
2493                                 continue;
2494                         }
2495
2496                         if ( lr->sl_mute ) {
2497                                 Debug( LDAP_DEBUG_CONNS,
2498                                         "daemon: " SLAP_EVENT_FNAME ": "
2499                                         "listen=%d muted\n",
2500                                         lr->sl_sd, 0, 0 );
2501                                 continue;
2502                         }
2503
2504                         if ( lr->sl_busy ) {
2505                                 Debug( LDAP_DEBUG_CONNS,
2506                                         "daemon: " SLAP_EVENT_FNAME ": "
2507                                         "listen=%d busy\n",
2508                                         lr->sl_sd, 0, 0 );
2509                                 continue;
2510                         }
2511
2512                         Debug( LDAP_DEBUG_CONNS,
2513                                 "daemon: " SLAP_EVENT_FNAME ": "
2514                                 "listen=%d active_threads=%d tvp=%s\n",
2515                                 lr->sl_sd, at, tvp == NULL ? "NULL" : "zero" );
2516                 }
2517
2518                 SLAP_EVENT_WAIT( tid, tvp, &ns );
2519                 switch ( ns ) {
2520                 case -1: {      /* failure - try again */
2521                                 int err = sock_errno();
2522
2523                                 if ( err != EINTR ) {
2524                                         ebadf++;
2525
2526                                         /* Don't log unless we got it twice in a row */
2527                                         if ( !( ebadf & 1 ) ) {
2528                                                 Debug( LDAP_DEBUG_ANY,
2529                                                         "daemon: "
2530                                                         SLAP_EVENT_FNAME
2531                                                         " failed count %d "
2532                                                         "err (%d): %s\n",
2533                                                         ebadf, err,
2534                                                         sock_errstr( err ) );
2535                                         }
2536                                         if ( ebadf >= SLAPD_EBADF_LIMIT ) {
2537                                                 slapd_shutdown = 2;
2538                                         }
2539                                 }
2540                         }
2541                         continue;
2542
2543                 case 0:         /* timeout - let threads run */
2544                         ebadf = 0;
2545 #ifndef HAVE_YIELDING_SELECT
2546                         Debug( LDAP_DEBUG_CONNS, "daemon: " SLAP_EVENT_FNAME
2547                                 "timeout - yielding\n",
2548                                 0, 0, 0 );
2549
2550                         ldap_pvt_thread_yield();
2551 #endif /* ! HAVE_YIELDING_SELECT */
2552                         continue;
2553
2554                 default:        /* something happened - deal with it */
2555                         if ( slapd_shutdown ) continue;
2556
2557                         ebadf = 0;
2558                         Debug( LDAP_DEBUG_CONNS,
2559                                 "daemon: activity on %d descriptor%s\n",
2560                                 ns, ns != 1 ? "s" : "", 0 );
2561                         /* FALL THRU */
2562                 }
2563
2564 #if SLAP_EVENTS_ARE_INDEXED
2565                 if ( SLAP_EVENT_IS_READ( wake_sds[tid][0] ) ) {
2566                         char c[BUFSIZ];
2567                         SLAP_EVENT_CLR_READ( wake_sds[tid][0] );
2568                         waking = 0;
2569                         tcp_read( SLAP_FD2SOCK(wake_sds[tid][0]), c, sizeof(c) );
2570                         Debug( LDAP_DEBUG_CONNS, "daemon: waked\n", 0, 0, 0 );
2571                         continue;
2572                 }
2573
2574                 /* The event slot equals the descriptor number - this is
2575                  * true for Unix select and poll. We treat Windows select
2576                  * like this too, even though it's a kludge.
2577                  */
2578                 if ( listening )
2579                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2580                         int rc;
2581
2582                         if ( ns <= 0 ) break;
2583                         if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) continue;
2584 #ifdef LDAP_CONNECTIONLESS
2585                         if ( slap_listeners[l]->sl_is_udp ) continue;
2586 #endif /* LDAP_CONNECTIONLESS */
2587                         if ( !SLAP_EVENT_IS_READ( slap_listeners[l]->sl_sd ) ) continue;
2588
2589                         /* clear events */
2590                         SLAP_EVENT_CLR_READ( slap_listeners[l]->sl_sd );
2591                         SLAP_EVENT_CLR_WRITE( slap_listeners[l]->sl_sd );
2592                         ns--;
2593
2594                         rc = slap_listener_activate( slap_listeners[l] );
2595                 }
2596
2597                 /* bypass the following tests if no descriptors left */
2598                 if ( ns <= 0 ) {
2599 #ifndef HAVE_YIELDING_SELECT
2600                         ldap_pvt_thread_yield();
2601 #endif /* HAVE_YIELDING_SELECT */
2602                         continue;
2603                 }
2604
2605                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
2606                 nrfds = 0;
2607                 nwfds = 0;
2608                 for ( i = 0; i < nfds; i++ ) {
2609                         int     r, w;
2610
2611                         r = SLAP_EVENT_IS_READ( i );
2612                         /* writefds was not initialized if nwriters was zero */
2613                         w = nwriters ? SLAP_EVENT_IS_WRITE( i ) : 0;
2614                         if ( r || w ) {
2615                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", i,
2616                                     r ? "r" : "", w ? "w" : "" );
2617                                 if ( r ) {
2618                                         nrfds++;
2619                                         ns--;
2620                                 }
2621                                 if ( w ) {
2622                                         nwfds++;
2623                                         ns--;
2624                                 }
2625                         }
2626                         if ( ns <= 0 ) break;
2627                 }
2628                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
2629
2630                 /* loop through the writers */
2631                 for ( i = 0; nwfds > 0; i++ ) {
2632                         ber_socket_t wd;
2633                         if ( ! SLAP_EVENT_IS_WRITE( i ) ) continue;
2634                         wd = i;
2635
2636                         SLAP_EVENT_CLR_WRITE( wd );
2637                         nwfds--;
2638
2639                         Debug( LDAP_DEBUG_CONNS,
2640                                 "daemon: write active on %d\n",
2641                                 wd, 0, 0 );
2642
2643                         /*
2644                          * NOTE: it is possible that the connection was closed
2645                          * and that the stream is now inactive.
2646                          * connection_write() must validate the stream is still
2647                          * active.
2648                          *
2649                          * ITS#4338: if the stream is invalid, there is no need to
2650                          * close it here. It has already been closed in connection.c.
2651                          */
2652                         if ( connection_write( wd ) < 0 ) {
2653                                 if ( SLAP_EVENT_IS_READ( wd ) ) {
2654                                         SLAP_EVENT_CLR_READ( (unsigned) wd );
2655                                         nrfds--;
2656                                 }
2657                         }
2658                 }
2659
2660                 for ( i = 0; nrfds > 0; i++ ) {
2661                         ber_socket_t rd;
2662                         if ( ! SLAP_EVENT_IS_READ( i ) ) continue;
2663                         rd = i;
2664                         SLAP_EVENT_CLR_READ( rd );
2665                         nrfds--;
2666
2667                         Debug ( LDAP_DEBUG_CONNS,
2668                                 "daemon: read activity on %d\n", rd, 0, 0 );
2669                         /*
2670                          * NOTE: it is possible that the connection was closed
2671                          * and that the stream is now inactive.
2672                          * connection_read() must valid the stream is still
2673                          * active.
2674                          */
2675
2676                         connection_read_activate( rd );
2677                 }
2678 #else   /* !SLAP_EVENTS_ARE_INDEXED */
2679         /* FIXME */
2680         /* The events are returned in an arbitrary list. This is true
2681          * for /dev/poll, epoll and kqueue. In order to prioritize things
2682          * so that we can handle wake_sds first, listeners second, and then
2683          * all other connections last (as we do for select), we would need
2684          * to use multiple event handles and cascade them.
2685          *
2686          * That seems like a bit of hassle. So the wake_sds check has been
2687          * skipped. For epoll and kqueue we can associate arbitrary data with
2688          * an event, so we could use pointers to the listener structure
2689          * instead of just the file descriptor. For /dev/poll we have to
2690          * search the listeners array for a matching descriptor.
2691          *
2692          * We now handle wake events when we see them; they are not given
2693          * higher priority.
2694          */
2695 #ifdef LDAP_DEBUG
2696                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
2697
2698                 for ( i = 0; i < ns; i++ ) {
2699                         int     r, w, fd;
2700
2701                         /* Don't log listener events */
2702                         if ( SLAP_EVENT_IS_LISTENER( tid, i )
2703 #ifdef LDAP_CONNECTIONLESS
2704                                 && !( (SLAP_EVENT_LISTENER( tid, i ))->sl_is_udp )
2705 #endif /* LDAP_CONNECTIONLESS */
2706                                 )
2707                         {
2708                                 continue;
2709                         }
2710
2711                         fd = SLAP_EVENT_FD( tid, i );
2712                         /* Don't log internal wake events */
2713                         if ( fd == wake_sds[tid][0] ) continue;
2714
2715                         r = SLAP_EVENT_IS_READ( i );
2716                         w = SLAP_EVENT_IS_WRITE( i );
2717                         if ( r || w ) {
2718                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", fd,
2719                                     r ? "r" : "", w ? "w" : "" );
2720                         }
2721                 }
2722                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
2723 #endif /* LDAP_DEBUG */
2724
2725                 for ( i = 0; i < ns; i++ ) {
2726                         int rc = 1, fd, w = 0, r = 0;
2727
2728                         if ( SLAP_EVENT_IS_LISTENER( tid, i ) ) {
2729                                 rc = slap_listener_activate( SLAP_EVENT_LISTENER( tid, i ) );
2730                         }
2731
2732                         /* If we found a regular listener, rc is now zero, and we
2733                          * can skip the data portion. But if it was a UDP listener
2734                          * then rc is still 1, and we want to handle the data.
2735                          */
2736                         if ( rc ) {
2737                                 fd = SLAP_EVENT_FD( tid, i );
2738
2739                                 /* Handle wake events */
2740                                 if ( fd == wake_sds[tid][0] ) {
2741                                         char c[BUFSIZ];
2742                                         waking = 0;
2743                                         tcp_read( SLAP_FD2SOCK(wake_sds[tid][0]), c, sizeof(c) );
2744                                         continue;
2745                                 }
2746
2747                                 if ( SLAP_EVENT_IS_WRITE( i ) ) {
2748                                         Debug( LDAP_DEBUG_CONNS,
2749                                                 "daemon: write active on %d\n",
2750                                                 fd, 0, 0 );
2751
2752                                         SLAP_EVENT_CLR_WRITE( i );
2753                                         w = 1;
2754
2755                                         /*
2756                                          * NOTE: it is possible that the connection was closed
2757                                          * and that the stream is now inactive.
2758                                          * connection_write() must valid the stream is still
2759                                          * active.
2760                                          */
2761                                         if ( connection_write( fd ) < 0 ) {
2762                                                 continue;
2763                                         }
2764                                 }
2765                                 /* If event is a read */
2766                                 if ( SLAP_EVENT_IS_READ( i )) {
2767                                         r = 1;
2768                                         Debug( LDAP_DEBUG_CONNS,
2769                                                 "daemon: read active on %d\n",
2770                                                 fd, 0, 0 );
2771
2772                                         SLAP_EVENT_CLR_READ( i );
2773                                         connection_read_activate( fd );
2774                                 } else if ( !w ) {
2775 #ifdef HAVE_EPOLL
2776                                         /* Don't keep reporting the hangup
2777                                          */
2778                                         if ( SLAP_SOCK_IS_ACTIVE( tid, fd )) {
2779                                                 SLAP_EPOLL_SOCK_SET( tid, fd, EPOLLET );
2780                                         }
2781 #endif
2782                                 }
2783                         }
2784                 }
2785 #endif  /* SLAP_EVENTS_ARE_INDEXED */
2786
2787 #ifndef HAVE_YIELDING_SELECT
2788                 ldap_pvt_thread_yield();
2789 #endif /* ! HAVE_YIELDING_SELECT */
2790         }
2791
2792         /* Only thread 0 handles shutdown */
2793         if ( tid )
2794                 return NULL;
2795
2796         if ( slapd_shutdown == 1 ) {
2797                 Debug( LDAP_DEBUG_ANY,
2798                         "daemon: shutdown requested and initiated.\n",
2799                         0, 0, 0 );
2800
2801         } else if ( slapd_shutdown == 2 ) {
2802 #ifdef HAVE_NT_SERVICE_MANAGER
2803                         Debug( LDAP_DEBUG_ANY,
2804                                "daemon: shutdown initiated by Service Manager.\n",
2805                                0, 0, 0);
2806 #else /* !HAVE_NT_SERVICE_MANAGER */
2807                         Debug( LDAP_DEBUG_ANY,
2808                                "daemon: abnormal condition, shutdown initiated.\n",
2809                                0, 0, 0 );
2810 #endif /* !HAVE_NT_SERVICE_MANAGER */
2811         } else {
2812                 Debug( LDAP_DEBUG_ANY,
2813                        "daemon: no active streams, shutdown initiated.\n",
2814                        0, 0, 0 );
2815         }
2816
2817         close_listeners( 0 );
2818
2819         if ( !slapd_gentle_shutdown ) {
2820                 slapd_abrupt_shutdown = 1;
2821                 connections_shutdown();
2822         }
2823
2824         if ( LogTest( LDAP_DEBUG_ANY )) {
2825                 int t = ldap_pvt_thread_pool_backload( &connection_pool );
2826                 Debug( LDAP_DEBUG_ANY,
2827                         "slapd shutdown: waiting for %d operations/tasks to finish\n",
2828                         t, 0, 0 );
2829         }
2830         ldap_pvt_thread_pool_destroy( &connection_pool, 1 );
2831
2832         return NULL;
2833 }
2834
2835
2836 #ifdef LDAP_CONNECTIONLESS
2837 static int
2838 connectionless_init( void )
2839 {
2840         int l;
2841
2842         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2843                 Listener *lr = slap_listeners[l];
2844                 Connection *c;
2845
2846                 if ( !lr->sl_is_udp ) {
2847                         continue;
2848                 }
2849
2850                 c = connection_init( lr->sl_sd, lr, "", "",
2851                         CONN_IS_UDP, (slap_ssf_t) 0, NULL
2852                         LDAP_PF_LOCAL_SENDMSG_ARG(NULL));
2853
2854                 if ( !c ) {
2855                         Debug( LDAP_DEBUG_TRACE,
2856                                 "connectionless_init: failed on %s (%d)\n",
2857                                 lr->sl_url.bv_val, lr->sl_sd, 0 );
2858                         return -1;
2859                 }
2860                 lr->sl_is_udp++;
2861         }
2862
2863         return 0;
2864 }
2865 #endif /* LDAP_CONNECTIONLESS */
2866
2867 int
2868 slapd_daemon( void )
2869 {
2870         int i, rc;
2871
2872 #ifdef LDAP_CONNECTIONLESS
2873         connectionless_init();
2874 #endif /* LDAP_CONNECTIONLESS */
2875
2876         if ( slapd_daemon_threads > SLAPD_MAX_DAEMON_THREADS )
2877                 slapd_daemon_threads = SLAPD_MAX_DAEMON_THREADS;
2878
2879         listener_tid = ch_malloc(slapd_daemon_threads * sizeof(ldap_pvt_thread_t));
2880
2881         /* daemon_init only inits element 0 */
2882         for ( i=1; i<slapd_daemon_threads; i++ )
2883         {
2884                 ldap_pvt_thread_mutex_init( &slap_daemon[i].sd_mutex );
2885
2886                 if( (rc = lutil_pair( wake_sds[i] )) < 0 ) {
2887                         Debug( LDAP_DEBUG_ANY,
2888                                 "daemon: lutil_pair() failed rc=%d\n", rc, 0, 0 );
2889                         return rc;
2890                 }
2891                 ber_pvt_socket_set_nonblock( wake_sds[i][1], 1 );
2892
2893                 SLAP_SOCK_INIT(i);
2894         }
2895
2896         for ( i=0; i<slapd_daemon_threads; i++ )
2897         {
2898                 /* listener as a separate THREAD */
2899                 rc = ldap_pvt_thread_create( &listener_tid[i],
2900                         0, slapd_daemon_task, &listener_tid[i] );
2901
2902                 if ( rc != 0 ) {
2903                         Debug( LDAP_DEBUG_ANY,
2904                         "listener ldap_pvt_thread_create failed (%d)\n", rc, 0, 0 );
2905                         return rc;
2906                 }
2907         }
2908
2909         /* wait for the listener threads to complete */
2910         for ( i=0; i<slapd_daemon_threads; i++ )
2911                 ldap_pvt_thread_join( listener_tid[i], (void *)NULL );
2912
2913         destroy_listeners();
2914         ch_free( listener_tid );
2915         listener_tid = NULL;
2916
2917         return 0;
2918 }
2919
2920 static int
2921 sockinit( void )
2922 {
2923 #if defined( HAVE_WINSOCK2 )
2924         WORD wVersionRequested;
2925         WSADATA wsaData;
2926         int err;
2927
2928         wVersionRequested = MAKEWORD( 2, 0 );
2929
2930         err = WSAStartup( wVersionRequested, &wsaData );
2931         if ( err != 0 ) {
2932                 /* Tell the user that we couldn't find a usable */
2933                 /* WinSock DLL.                                  */
2934                 return -1;
2935         }
2936
2937         /* Confirm that the WinSock DLL supports 2.0.*/
2938         /* Note that if the DLL supports versions greater    */
2939         /* than 2.0 in addition to 2.0, it will still return */
2940         /* 2.0 in wVersion since that is the version we      */
2941         /* requested.                                        */
2942
2943         if ( LOBYTE( wsaData.wVersion ) != 2 ||
2944                 HIBYTE( wsaData.wVersion ) != 0 )
2945         {
2946             /* Tell the user that we couldn't find a usable */
2947             /* WinSock DLL.                                  */
2948             WSACleanup();
2949             return -1;
2950         }
2951
2952         /* The WinSock DLL is acceptable. Proceed. */
2953 #elif defined( HAVE_WINSOCK )
2954         WSADATA wsaData;
2955         if ( WSAStartup( 0x0101, &wsaData ) != 0 ) return -1;
2956 #endif /* ! HAVE_WINSOCK2 && ! HAVE_WINSOCK */
2957
2958         return 0;
2959 }
2960
2961 static int
2962 sockdestroy( void )
2963 {
2964 #if defined( HAVE_WINSOCK2 ) || defined( HAVE_WINSOCK )
2965         WSACleanup();
2966 #endif /* HAVE_WINSOCK2 || HAVE_WINSOCK */
2967
2968         return 0;
2969 }
2970
2971 RETSIGTYPE
2972 slap_sig_shutdown( int sig )
2973 {
2974         int save_errno = errno;
2975         int i;
2976
2977 #if 0
2978         Debug(LDAP_DEBUG_TRACE, "slap_sig_shutdown: signal %d\n", sig, 0, 0);
2979 #endif
2980
2981         /*
2982          * If the NT Service Manager is controlling the server, we don't
2983          * want SIGBREAK to kill the server. For some strange reason,
2984          * SIGBREAK is generated when a user logs out.
2985          */
2986
2987 #if defined(HAVE_NT_SERVICE_MANAGER) && defined(SIGBREAK)
2988         if (is_NT_Service && sig == SIGBREAK) {
2989                 /* empty */;
2990         } else
2991 #endif /* HAVE_NT_SERVICE_MANAGER && SIGBREAK */
2992 #ifdef SIGHUP
2993         if (sig == SIGHUP && global_gentlehup && slapd_gentle_shutdown == 0) {
2994                 slapd_gentle_shutdown = 1;
2995         } else
2996 #endif /* SIGHUP */
2997         {
2998                 slapd_shutdown = 1;
2999         }
3000
3001         for (i=0; i<slapd_daemon_threads; i++) {
3002                 WAKE_LISTENER(i,1);
3003         }
3004
3005         /* reinstall self */
3006         (void) SIGNAL_REINSTALL( sig, slap_sig_shutdown );
3007
3008         errno = save_errno;
3009 }
3010
3011 RETSIGTYPE
3012 slap_sig_wake( int sig )
3013 {
3014         int save_errno = errno;
3015
3016         WAKE_LISTENER(0,1);
3017
3018         /* reinstall self */
3019         (void) SIGNAL_REINSTALL( sig, slap_sig_wake );
3020
3021         errno = save_errno;
3022 }
3023
3024
3025 void
3026 slapd_add_internal( ber_socket_t s, int isactive )
3027 {
3028         slapd_add( s, isactive, NULL, -1 );
3029 }
3030
3031 Listener **
3032 slapd_get_listeners( void )
3033 {
3034         /* Could return array with no listeners if !listening, but current
3035          * callers mostly look at the URLs.  E.g. syncrepl uses this to
3036          * identify the server, which means it wants the startup arguments.
3037          */
3038         return slap_listeners;
3039 }
3040
3041 /* Reject all incoming requests */
3042 void
3043 slap_suspend_listeners( void )
3044 {
3045         int i;
3046         for (i=0; slap_listeners[i]; i++) {
3047                 slap_listeners[i]->sl_mute = 1;
3048                 listen( slap_listeners[i]->sl_sd, 0 );
3049         }
3050 }
3051
3052 /* Resume after a suspend */
3053 void
3054 slap_resume_listeners( void )
3055 {
3056         int i;
3057         for (i=0; slap_listeners[i]; i++) {
3058                 slap_listeners[i]->sl_mute = 0;
3059                 listen( slap_listeners[i]->sl_sd, SLAPD_LISTEN_BACKLOG );
3060         }
3061 }
3062
3063 void
3064 slap_wake_listener()
3065 {
3066         WAKE_LISTENER(0,1);
3067 }
3068
3069 /* return 0 on timeout, 1 on writer ready
3070  * -1 on general error
3071  */
3072 int
3073 slapd_wait_writer( ber_socket_t sd )
3074 {
3075 #ifdef HAVE_WINSOCK
3076         fd_set writefds;
3077         struct timeval tv, *tvp;
3078
3079         FD_ZERO( &writefds );
3080         FD_SET( slapd_ws_sockets[sd], &writefds );
3081         if ( global_writetimeout ) {
3082                 tv.tv_sec = global_writetimeout;
3083                 tv.tv_usec = 0;
3084                 tvp = &tv;
3085         } else {
3086                 tvp = NULL;
3087         }
3088         return select( 0, NULL, &writefds, NULL, tvp );
3089 #else
3090         struct pollfd fds;
3091         int timeout = global_writetimeout ? global_writetimeout * 1000 : -1;
3092
3093         fds.fd = sd;
3094         fds.events = POLLOUT;
3095
3096         return poll( &fds, 1, timeout );
3097 #endif
3098 }