Adding upstream version 2.5.13+dfsg.upstream/2.5.13+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 3610 insertions, 0 deletions

diff --git a/servers/slapd/daemon.c b/servers/slapd/daemon.c
new file mode 100644
index 0000000..18db97a
--- /dev/null
+++ b/servers/slapd/daemon.c
@@ -0,0 +1,3610 @@
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2022 The OpenLDAP Foundation.
+ * Portions Copyright 2007 by Howard Chu, Symas Corporation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+/* Portions Copyright (c) 1995 Regents of the University of Michigan.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and that due credit is given
+ * to the University of Michigan at Ann Arbor. The name of the University
+ * may not be used to endorse or promote products derived from this
+ * software without specific prior written permission. This software
+ * is provided ``as is'' without express or implied warranty.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+
+#include <ac/ctype.h>
+#include <ac/errno.h>
+#include <ac/socket.h>
+#include <ac/string.h>
+#include <ac/time.h>
+#include <ac/unistd.h>
+
+#include "slap.h"
+#include "ldap_pvt_thread.h"
+#include "lutil.h"
+
+#include "ldap_rq.h"
+
+#ifdef HAVE_SYSTEMD_SD_DAEMON_H
+#include <systemd/sd-daemon.h>
+#endif
+
+#ifdef HAVE_POLL
+#include <poll.h>
+#endif
+
+#ifdef HAVE_KQUEUE
+# include <sys/types.h>
+# include <sys/event.h>
+# include <sys/time.h>
+#elif defined(HAVE_SYS_EPOLL_H) && defined(HAVE_EPOLL)
+# include <sys/epoll.h>
+#elif defined(SLAP_X_DEVPOLL) && defined(HAVE_SYS_DEVPOLL_H) && defined(HAVE_DEVPOLL)
+# include <sys/types.h>
+# include <sys/stat.h>
+# include <fcntl.h>
+# include <sys/devpoll.h>
+#endif /* ! kqueue && ! epoll && ! /dev/poll */
+
+#ifdef HAVE_TCPD
+int allow_severity = LOG_INFO;
+int deny_severity = LOG_NOTICE;
+#endif /* TCP Wrappers */
+
+#ifdef LDAP_PF_LOCAL
+# include <sys/stat.h>
+/* this should go in <ldap.h> as soon as it is accepted */
+# define LDAPI_MOD_URLEXT		"x-mod"
+#endif /* LDAP_PF_LOCAL */
+
+#ifdef LDAP_PF_INET6
+int slap_inet4or6 = AF_UNSPEC;
+#else /* ! INETv6 */
+int slap_inet4or6 = AF_INET;
+#endif /* ! INETv6 */
+
+/* globals */
+time_t starttime;
+ber_socket_t dtblsize;
+slap_ssf_t local_ssf = LDAP_PVT_SASL_LOCAL_SSF;
+struct runqueue_s slapd_rq;
+
+int slapd_daemon_threads = 1;
+int slapd_daemon_mask;
+
+#ifdef LDAP_TCP_BUFFER
+int slapd_tcp_rmem;
+int slapd_tcp_wmem;
+#endif /* LDAP_TCP_BUFFER */
+
+Listener **slap_listeners = NULL;
+static volatile sig_atomic_t listening = 1; /* 0 when slap_listeners closed */
+
+#ifndef SLAPD_LISTEN_BACKLOG
+#define SLAPD_LISTEN_BACKLOG 2048
+#endif /* ! SLAPD_LISTEN_BACKLOG */
+
+#define	DAEMON_ID(fd)	(fd & slapd_daemon_mask)
+
+typedef ber_socket_t sdpair[2];
+
+static sdpair *wake_sds;
+static ldap_pvt_thread_mutex_t emfile_mutex;
+static int emfile;
+
+static volatile int waking;
+#define WAKE_LISTENER(l,w)	do { \
+	if (w) { \
+		(void)!tcp_write( SLAP_FD2SOCK(wake_sds[l][1]), "0", 1 ); \
+	} \
+} while (0)
+
+ldap_pvt_thread_mutex_t slapd_init_mutex;
+ldap_pvt_thread_cond_t slapd_init_cond;
+int slapd_ready = 0;
+
+volatile sig_atomic_t slapd_shutdown = 0;
+volatile sig_atomic_t slapd_gentle_shutdown = 0;
+volatile sig_atomic_t slapd_abrupt_shutdown = 0;
+
+#ifdef HAVE_WINSOCK
+ldap_pvt_thread_mutex_t slapd_ws_mutex;
+SOCKET *slapd_ws_sockets;
+#define	SD_READ 1
+#define	SD_WRITE	2
+#define	SD_ACTIVE	4
+#define	SD_LISTENER	8
+#endif
+
+#ifdef HAVE_TCPD
+static ldap_pvt_thread_mutex_t	sd_tcpd_mutex;
+#endif /* TCP Wrappers */
+
+typedef struct slap_daemon_st {
+	ldap_pvt_thread_mutex_t	sd_mutex;
+
+	ber_socket_t		sd_nactives;
+	int			sd_nwriters;
+	int			sd_nfds;
+	ldap_pvt_thread_t	sd_tid;
+
+#if defined(HAVE_KQUEUE)
+	uint8_t*        sd_fdmodes; /* indexed by fd */
+	Listener**      sd_l;       /* indexed by fd */
+	/* Double buffer the kqueue changes to avoid holding the sd_mutex \
+	 * during a kevent() call. \
+	 */
+	struct kq_change {
+	    struct kevent*  sd_changes;
+	    int             sd_nchanges;
+	    int             sd_maxchanges;
+	}               sd_kqc[2];
+	int             sd_changeidx; /* index to current change buffer */
+	int             sd_kq;
+#elif defined(HAVE_EPOLL)
+
+	struct epoll_event	*sd_epolls;
+	int			*sd_index;
+	int			sd_epfd;
+#elif defined(SLAP_X_DEVPOLL) && defined(HAVE_DEVPOLL)
+	/* eXperimental */
+	struct pollfd		*sd_pollfd;
+	int			*sd_index;
+	Listener		**sd_l;
+	int			sd_dpfd;
+#else /* ! kqueue && ! epoll && ! /dev/poll */
+#ifdef HAVE_WINSOCK
+	char	*sd_flags;
+	char	*sd_rflags;
+#else /* ! HAVE_WINSOCK */
+	fd_set			sd_actives;
+	fd_set			sd_readers;
+	fd_set			sd_writers;
+#endif /* ! HAVE_WINSOCK */
+#endif /* ! kqueue && ! epoll && ! /dev/poll */
+} slap_daemon_st;
+
+static slap_daemon_st *slap_daemon;
+
+/*
+ * NOTE: naming convention for macros:
+ *
+ * - SLAP_SOCK_* and SLAP_EVENT_* for public interface that deals
+ *   with file descriptors and events respectively
+ *
+ * - SLAP_<type>_* for private interface; type by now is one of
+ *   EPOLL, DEVPOLL, SELECT, KQUEUE
+ *
+ * private interface should not be used in the code.
+ */
+#ifdef HAVE_KQUEUE
+# define SLAP_EVENT_FNAME		    "kqueue"
+# define SLAP_EVENTS_ARE_INDEXED	0
+# define SLAP_EVENT_MAX(t)             (2 * dtblsize)  /* each fd can have a read & a write event */
+
+# define SLAP_EVENT_DECL \
+     static struct kevent* events = NULL
+
+# define SLAP_EVENT_INIT(t) do {\
+    if (!events) { \
+        events = ch_malloc(sizeof(*events) * SLAP_EVENT_MAX(t)); \
+    } \
+} while (0)
+
+# define SLAP_SOCK_INIT(t) do { \
+    int kq_i; \
+    size_t kq_nbytes; \
+    Debug(LDAP_DEBUG_ANY, "daemon: SLAP_SOCK_INIT: dtblsize=%d\n", dtblsize); \
+    slap_daemon[t].sd_nfds       = 0; \
+    slap_daemon[t].sd_changeidx  = 0; \
+    for (kq_i = 0;  kq_i < 2;  kq_i++) { \
+        struct kq_change* kqc = &slap_daemon[t].sd_kqc[kq_i]; \
+        kqc->sd_nchanges   = 0; \
+        kqc->sd_maxchanges = 256; /* will grow as needed */ \
+        kq_nbytes = sizeof(*kqc->sd_changes) * kqc->sd_maxchanges; \
+        kqc->sd_changes = ch_calloc(1, kq_nbytes); \
+    } \
+    kq_nbytes = sizeof(*slap_daemon[t].sd_fdmodes) * dtblsize; \
+    slap_daemon[t].sd_fdmodes = ch_calloc(1, kq_nbytes); \
+    kq_nbytes = sizeof(*slap_daemon[t].sd_l) * dtblsize; \
+    slap_daemon[t].sd_l = ch_calloc(1, kq_nbytes); \
+    slap_daemon[t].sd_kq = kqueue(); \
+} while (0)
+
+/* a kqueue fd obtained before a fork isn't inherited by child process.
+ * reacquire it.
+ */
+# define SLAP_SOCK_INIT2() do { \
+	slap_daemon[0].sd_kq = kqueue(); \
+} while (0)
+
+# define SLAP_SOCK_DESTROY(t) do { \
+	int kq_i; \
+    if (slap_daemon[t].sd_kq > 0) { \
+        close(slap_daemon[t].sd_kq); \
+        slap_daemon[t].sd_kq = -1; \
+    } \
+    for (kq_i = 0;  kq_i < 2;  kq_i++) { \
+        if (slap_daemon[t].sd_kqc[kq_i].sd_changes != NULL) { \
+            ch_free(slap_daemon[t].sd_kqc[kq_i].sd_changes); \
+            slap_daemon[t].sd_kqc[kq_i].sd_changes = NULL; \
+        } \
+        slap_daemon[t].sd_kqc[kq_i].sd_nchanges = 0; \
+        slap_daemon[t].sd_kqc[kq_i].sd_maxchanges = 0; \
+    } \
+    if (slap_daemon[t].sd_l != NULL) { \
+        ch_free(slap_daemon[t].sd_l); \
+        slap_daemon[t].sd_l = NULL; \
+    } \
+    if (slap_daemon[t].sd_fdmodes != NULL) { \
+        ch_free(slap_daemon[t].sd_fdmodes); \
+        slap_daemon[t].sd_fdmodes = NULL; \
+    } \
+    slap_daemon[t].sd_nfds = 0; \
+} while (0)
+
+# define SLAP_KQUEUE_SOCK_ACTIVE        0x01
+# define SLAP_KQUEUE_SOCK_READ_ENABLED  0x02
+# define SLAP_KQUEUE_SOCK_WRITE_ENABLED 0x04
+
+# define SLAP_SOCK_IS_ACTIVE(t,s)  (slap_daemon[t].sd_fdmodes[(s)] != 0)
+# define SLAP_SOCK_NOT_ACTIVE(t,s) (slap_daemon[t].sd_fdmodes[(s)] == 0)
+# define SLAP_SOCK_IS_READ(t,s)    (slap_daemon[t].sd_fdmodes[(s)] & SLAP_KQUEUE_SOCK_READ_ENABLED)
+# define SLAP_SOCK_IS_WRITE(t,s)   (slap_daemon[t].sd_fdmodes[(s)] & SLAP_KQUEUE_SOCK_WRITE_ENABLED)
+
+/*
+ * SLAP_SOCK_SET_* & SLAP_SOCK_CLR_* get called a _lot_.  Since kevent()
+ * processes changes before it looks for events, batch up the changes which
+ * will get submitted the next time kevent() is called for events.
+ */
+
+# define SLAP_KQUEUE_CHANGE(t, s, filter, flag) do { \
+    /* If maxchanges is reached, have to realloc to make room for more. \
+     * Ideally we'd call kevent(), but the daemon thread could be sitting \
+     * in kevent() waiting for events. \
+     */ \
+    struct kq_change* kqc = &slap_daemon[t].sd_kqc[slap_daemon[t].sd_changeidx]; \
+    if (kqc->sd_nchanges == kqc->sd_maxchanges) { \
+        /* Don't want to do this very often.  Double the size. */ \
+        size_t kq_nbytes; \
+        Debug(LDAP_DEBUG_CONNS, \
+              "daemon: SLAP_KQUEUE_CHANGE: increasing slap_daemon.sd_kqc[%d].maxchanges from %d to %d\n", \
+              slap_daemon[t].sd_changeidx, kqc->sd_maxchanges, 2*kqc->sd_maxchanges); \
+        kqc->sd_maxchanges += kqc->sd_maxchanges; \
+        kq_nbytes = sizeof(*kqc->sd_changes) * kqc->sd_maxchanges; \
+        kqc->sd_changes = ch_realloc(kqc->sd_changes, kq_nbytes); \
+    } \
+    EV_SET(&kqc->sd_changes[kqc->sd_nchanges++], \
+           (s), (filter), (flag), 0, 0, slap_daemon[t].sd_l[(s)]); \
+} while (0)
+
+# define SLAP_KQUEUE_SOCK_SET(t, s, filter, mode) do { \
+    if ((slap_daemon[t].sd_fdmodes[(s)] & (mode)) != (mode)) { \
+        slap_daemon[t].sd_fdmodes[(s)] |= (mode); \
+        SLAP_KQUEUE_CHANGE(t, (s), (filter), EV_ENABLE); \
+    } \
+} while (0)
+
+# define SLAP_KQUEUE_SOCK_CLR(t, s, filter, mode) do { \
+    if (slap_daemon[t].sd_fdmodes[(s)] & (mode)) { \
+        slap_daemon[t].sd_fdmodes[(s)] &= ~(mode); \
+        SLAP_KQUEUE_CHANGE(t, (s), (filter), EV_DISABLE); \
+    } \
+} while (0)
+
+# define SLAP_SOCK_SET_READ(t, s)  SLAP_KQUEUE_SOCK_SET(t, (s), EVFILT_READ,  SLAP_KQUEUE_SOCK_READ_ENABLED)
+# define SLAP_SOCK_SET_WRITE(t, s) SLAP_KQUEUE_SOCK_SET(t, (s), EVFILT_WRITE, SLAP_KQUEUE_SOCK_WRITE_ENABLED)
+# define SLAP_SOCK_CLR_READ(t, s)  SLAP_KQUEUE_SOCK_CLR(t, (s), EVFILT_READ,  SLAP_KQUEUE_SOCK_READ_ENABLED)
+# define SLAP_SOCK_CLR_WRITE(t, s) SLAP_KQUEUE_SOCK_CLR(t, (s), EVFILT_WRITE, SLAP_KQUEUE_SOCK_WRITE_ENABLED)
+
+/* kqueue doesn't need to do anything to clear the event. */
+# define SLAP_EVENT_CLR_READ(i)     do {} while (0)
+# define SLAP_EVENT_CLR_WRITE(i)    do {} while (0)
+
+# define SLAP_SOCK_ADD(t, s, l) do { \
+    assert( s < dtblsize ); \
+    slap_daemon[t].sd_l[(s)] = (l); \
+    slap_daemon[t].sd_fdmodes[(s)] = SLAP_KQUEUE_SOCK_ACTIVE | SLAP_KQUEUE_SOCK_READ_ENABLED; \
+    ++slap_daemon[t].sd_nfds; \
+    SLAP_KQUEUE_CHANGE(t, (s), EVFILT_READ, EV_ADD); \
+    SLAP_KQUEUE_CHANGE(t, (s), EVFILT_WRITE, EV_ADD | EV_DISABLE); \
+} while (0)
+
+# define SLAP_SOCK_DEL(t, s) do { \
+    SLAP_KQUEUE_CHANGE(t, (s), EVFILT_READ, EV_DELETE); \
+    SLAP_KQUEUE_CHANGE(t, (s), EVFILT_WRITE, EV_DELETE); \
+    slap_daemon[t].sd_l[(s)] = NULL; \
+    slap_daemon[t].sd_fdmodes[(s)] = 0; \
+    --slap_daemon[t].sd_nfds; \
+} while (0)
+
+# define SLAP_EVENT_FD(t, i)          (events[(i)].ident)
+
+# define SLAP_EVENT_IS_READ(t, i) \
+    (events[(i)].filter == EVFILT_READ && SLAP_SOCK_IS_READ(t, SLAP_EVENT_FD(0, i)))
+
+# define SLAP_EVENT_IS_WRITE(t, i) \
+    (events[(i)].filter == EVFILT_WRITE && SLAP_SOCK_IS_WRITE(t, SLAP_EVENT_FD(0, i)))
+
+# define SLAP_EVENT_IS_LISTENER(t, i) \
+    (events[(i)].udata && SLAP_SOCK_IS_READ(t, SLAP_EVENT_FD(t, i)))
+
+# define SLAP_EVENT_LISTENER(t, i)    ((Listener*)(events[(i)].udata))
+
+# define SLAP_EVENT_WAIT(t, tvp, nsp) do { \
+    struct timespec  kq_ts; \
+    struct timespec* kq_tsp; \
+    int kq_idx; \
+    if (tvp) { \
+        TIMEVAL_TO_TIMESPEC((tvp), &kq_ts); \
+        kq_tsp = &kq_ts; \
+    } else { \
+        kq_tsp = NULL; \
+    } \
+    /* Save the change buffer index for use when the mutex is unlocked, \
+     * then switch the index so new changes go to the other buffer. \
+     */ \
+    ldap_pvt_thread_mutex_lock( &slap_daemon[t].sd_mutex ); \
+    kq_idx = slap_daemon[t].sd_changeidx; \
+    slap_daemon[t].sd_changeidx ^= 1; \
+    ldap_pvt_thread_mutex_unlock( &slap_daemon[t].sd_mutex ); \
+    *(nsp) = kevent(slap_daemon[t].sd_kq, \
+                    slap_daemon[t].sd_kqc[kq_idx].sd_nchanges \
+                        ? slap_daemon[t].sd_kqc[kq_idx].sd_changes : NULL, \
+                    slap_daemon[t].sd_kqc[kq_idx].sd_nchanges, \
+                    events, SLAP_EVENT_MAX(t), kq_tsp); \
+    slap_daemon[t].sd_kqc[kq_idx].sd_nchanges = 0; \
+} while(0)
+
+/*-------------------------------------------------------------------------------*/
+
+#elif defined(HAVE_EPOLL)
+/***************************************
+ * Use epoll infrastructure - epoll(4) *
+ ***************************************/
+# define SLAP_EVENT_FNAME		"epoll"
+# define SLAP_EVENTS_ARE_INDEXED	0
+# define SLAP_EPOLL_SOCK_IX(t,s)		(slap_daemon[t].sd_index[(s)])
+# define SLAP_EPOLL_SOCK_EP(t,s)		(slap_daemon[t].sd_epolls[SLAP_EPOLL_SOCK_IX(t,s)])
+# define SLAP_EPOLL_SOCK_EV(t,s)		(SLAP_EPOLL_SOCK_EP(t,s).events)
+# define SLAP_SOCK_IS_ACTIVE(t,s)		(SLAP_EPOLL_SOCK_IX(t,s) != -1)
+# define SLAP_SOCK_NOT_ACTIVE(t,s)	(SLAP_EPOLL_SOCK_IX(t,s) == -1)
+# define SLAP_EPOLL_SOCK_IS_SET(t,s, mode)	(SLAP_EPOLL_SOCK_EV(t,s) & (mode))
+
+# define SLAP_SOCK_IS_READ(t,s)		SLAP_EPOLL_SOCK_IS_SET(t,(s), EPOLLIN)
+# define SLAP_SOCK_IS_WRITE(t,s)		SLAP_EPOLL_SOCK_IS_SET(t,(s), EPOLLOUT)
+
+# define SLAP_EPOLL_SOCK_SET(t,s, mode)	do { \
+	if ( (SLAP_EPOLL_SOCK_EV(t,s) & (mode)) != (mode) ) {	\
+		SLAP_EPOLL_SOCK_EV(t,s) |= (mode); \
+		epoll_ctl( slap_daemon[t].sd_epfd, EPOLL_CTL_MOD, (s), \
+			&SLAP_EPOLL_SOCK_EP(t,s) ); \
+	} \
+} while (0)
+
+# define SLAP_EPOLL_SOCK_CLR(t,s, mode)	do { \
+	if ( (SLAP_EPOLL_SOCK_EV(t,s) & (mode)) ) { \
+		SLAP_EPOLL_SOCK_EV(t,s) &= ~(mode);	\
+		epoll_ctl( slap_daemon[t].sd_epfd, EPOLL_CTL_MOD, s, \
+			&SLAP_EPOLL_SOCK_EP(t,s) ); \
+	} \
+} while (0)
+
+# define SLAP_SOCK_SET_READ(t,s)		SLAP_EPOLL_SOCK_SET(t,s, EPOLLIN)
+# define SLAP_SOCK_SET_WRITE(t,s)		SLAP_EPOLL_SOCK_SET(t,s, EPOLLOUT)
+
+# define SLAP_SOCK_CLR_READ(t,s)		SLAP_EPOLL_SOCK_CLR(t,(s), EPOLLIN)
+# define SLAP_SOCK_CLR_WRITE(t,s)		SLAP_EPOLL_SOCK_CLR(t,(s), EPOLLOUT)
+
+#  define SLAP_SOCK_SET_SUSPEND(t,s) \
+	( slap_daemon[t].sd_suspend[SLAP_EPOLL_SOCK_IX(t,s)] = 1 )
+#  define SLAP_SOCK_CLR_SUSPEND(t,s) \
+	( slap_daemon[t].sd_suspend[SLAP_EPOLL_SOCK_IX(t,s)] = 0 )
+#  define SLAP_SOCK_IS_SUSPEND(t,s) \
+	( slap_daemon[t].sd_suspend[SLAP_EPOLL_SOCK_IX(t,s)] == 1 )
+
+# define SLAP_EPOLL_EVENT_CLR(i, mode)	(revents[(i)].events &= ~(mode))
+
+# define SLAP_EVENT_MAX(t)			slap_daemon[t].sd_nfds
+
+/* If a Listener address is provided, store that as the epoll data.
+ * Otherwise, store the address of this socket's slot in the
+ * index array. If we can't do this add, the system is out of
+ * resources and we need to shutdown.
+ */
+# define SLAP_SOCK_ADD(t, s, l)		do { \
+	int rc; \
+	SLAP_EPOLL_SOCK_IX(t,(s)) = slap_daemon[t].sd_nfds; \
+	SLAP_EPOLL_SOCK_EP(t,(s)).data.ptr = (l) ? (l) : (void *)(&SLAP_EPOLL_SOCK_IX(t,s)); \
+	SLAP_EPOLL_SOCK_EV(t,(s)) = EPOLLIN; \
+	rc = epoll_ctl(slap_daemon[t].sd_epfd, EPOLL_CTL_ADD, \
+		(s), &SLAP_EPOLL_SOCK_EP(t,(s))); \
+	if ( rc == 0 ) { \
+		slap_daemon[t].sd_nfds++; \
+	} else { \
+		int saved_errno = errno; \
+		Debug( LDAP_DEBUG_ANY, \
+			"daemon: epoll_ctl(ADD,fd=%d) failed, errno=%d, shutting down\n", \
+			s, saved_errno ); \
+		slapd_shutdown = 2; \
+	} \
+} while (0)
+
+# define SLAP_EPOLL_EV_LISTENER(t,ptr) \
+	(((int *)(ptr) >= slap_daemon[t].sd_index && \
+	(int *)(ptr) <= &slap_daemon[t].sd_index[dtblsize]) ? 0 : 1 )
+
+# define SLAP_EPOLL_EV_PTRFD(t,ptr)		(SLAP_EPOLL_EV_LISTENER(t,ptr) ? \
+	((Listener *)ptr)->sl_sd : \
+	(ber_socket_t) ((int *)(ptr) - slap_daemon[t].sd_index))
+
+# define SLAP_SOCK_DEL(t,s)		do { \
+	int fd, rc, index = SLAP_EPOLL_SOCK_IX(t,(s)); \
+	if ( index < 0 ) break; \
+	rc = epoll_ctl(slap_daemon[t].sd_epfd, EPOLL_CTL_DEL, \
+		(s), &SLAP_EPOLL_SOCK_EP(t,(s))); \
+	slap_daemon[t].sd_epolls[index] = \
+		slap_daemon[t].sd_epolls[slap_daemon[t].sd_nfds-1]; \
+	fd = SLAP_EPOLL_EV_PTRFD(t,slap_daemon[t].sd_epolls[index].data.ptr); \
+	slap_daemon[t].sd_index[fd] = index; \
+	slap_daemon[t].sd_index[(s)] = -1; \
+	slap_daemon[t].sd_nfds--; \
+} while (0)
+
+# define SLAP_EVENT_CLR_READ(i)		SLAP_EPOLL_EVENT_CLR((i), EPOLLIN)
+# define SLAP_EVENT_CLR_WRITE(i)	SLAP_EPOLL_EVENT_CLR((i), EPOLLOUT)
+
+# define SLAP_EPOLL_EVENT_CHK(i, mode)	(revents[(i)].events & mode)
+
+# define SLAP_EVENT_IS_READ(i)		SLAP_EPOLL_EVENT_CHK((i), EPOLLIN)
+# define SLAP_EVENT_IS_WRITE(i)		SLAP_EPOLL_EVENT_CHK((i), EPOLLOUT)
+# define SLAP_EVENT_IS_LISTENER(t,i)	SLAP_EPOLL_EV_LISTENER(t,revents[(i)].data.ptr)
+# define SLAP_EVENT_LISTENER(t,i)		((Listener *)(revents[(i)].data.ptr))
+
+# define SLAP_EVENT_FD(t,i)		SLAP_EPOLL_EV_PTRFD(t,revents[(i)].data.ptr)
+
+# define SLAP_SOCK_INIT(t)		do { \
+	int j; \
+	slap_daemon[t].sd_epolls = ch_calloc(1, \
+		( sizeof(struct epoll_event) * 2 \
+			+ sizeof(int) ) * dtblsize * 2); \
+	slap_daemon[t].sd_index = (int *)&slap_daemon[t].sd_epolls[ 2 * dtblsize ]; \
+	slap_daemon[t].sd_epfd = epoll_create( dtblsize / slapd_daemon_threads ); \
+	for ( j = 0; j < dtblsize; j++ ) slap_daemon[t].sd_index[j] = -1; \
+} while (0)
+
+# define SLAP_SOCK_INIT2()
+
+# define SLAP_SOCK_DESTROY(t)		do { \
+	if ( slap_daemon[t].sd_epolls != NULL ) { \
+		ch_free( slap_daemon[t].sd_epolls ); \
+		slap_daemon[t].sd_epolls = NULL; \
+		slap_daemon[t].sd_index = NULL; \
+		close( slap_daemon[t].sd_epfd ); \
+	} \
+} while ( 0 )
+
+# define SLAP_EVENT_DECL		struct epoll_event *revents
+
+# define SLAP_EVENT_INIT(t)		do { \
+	revents = slap_daemon[t].sd_epolls + dtblsize; \
+} while (0)
+
+# define SLAP_EVENT_WAIT(t, tvp, nsp)	do { \
+	*(nsp) = epoll_wait( slap_daemon[t].sd_epfd, revents, \
+		dtblsize, (tvp) ? ((tvp)->tv_sec * 1000 + (tvp)->tv_usec / 1000) : -1 ); \
+} while (0)
+
+#elif defined(SLAP_X_DEVPOLL) && defined(HAVE_DEVPOLL)
+
+/*************************************************************
+ * Use Solaris' (>= 2.7) /dev/poll infrastructure - poll(7d) *
+ *************************************************************/
+# define SLAP_EVENT_FNAME		"/dev/poll"
+# define SLAP_EVENTS_ARE_INDEXED	0
+/*
+ * - sd_index	is used much like with epoll()
+ * - sd_l	is maintained as an array containing the address
+ *		of the listener; the index is the fd itself
+ * - sd_pollfd	is used to keep track of what data has been
+ *		registered in /dev/poll
+ */
+# define SLAP_DEVPOLL_SOCK_IX(t,s)	(slap_daemon[t].sd_index[(s)])
+# define SLAP_DEVPOLL_SOCK_LX(t,s)	(slap_daemon[t].sd_l[(s)])
+# define SLAP_DEVPOLL_SOCK_EP(t,s)	(slap_daemon[t].sd_pollfd[SLAP_DEVPOLL_SOCK_IX(t,(s))])
+# define SLAP_DEVPOLL_SOCK_FD(t,s)	(SLAP_DEVPOLL_SOCK_EP(t,(s)).fd)
+# define SLAP_DEVPOLL_SOCK_EV(t,s)	(SLAP_DEVPOLL_SOCK_EP(t,(s)).events)
+# define SLAP_SOCK_IS_ACTIVE(t,s)		(SLAP_DEVPOLL_SOCK_IX(t,(s)) != -1)
+# define SLAP_SOCK_NOT_ACTIVE(t,s)	(SLAP_DEVPOLL_SOCK_IX(t,(s)) == -1)
+# define SLAP_SOCK_IS_SET(t,s, mode)	(SLAP_DEVPOLL_SOCK_EV(t,(s)) & (mode))
+
+# define SLAP_SOCK_IS_READ(t,s)		SLAP_SOCK_IS_SET(t,(s), POLLIN)
+# define SLAP_SOCK_IS_WRITE(t,s)		SLAP_SOCK_IS_SET(t,(s), POLLOUT)
+
+/* as far as I understand, any time we need to communicate with the kernel
+ * about the number and/or properties of a file descriptor we need it to
+ * wait for, we have to rewrite the whole set */
+# define SLAP_DEVPOLL_WRITE_POLLFD(t,s, pfd, n, what, shdn)	do { \
+	int rc; \
+	size_t size = (n) * sizeof( struct pollfd ); \
+	/* FIXME: use pwrite? */ \
+	rc = write( slap_daemon[t].sd_dpfd, (pfd), size ); \
+	if ( rc != size ) { \
+		int saved_errno = errno; \
+		Debug( LDAP_DEBUG_ANY, "daemon: " SLAP_EVENT_FNAME ": " \
+			"%s fd=%d failed errno=%d\n", \
+			(what), (s), saved_errno ); \
+		if ( (shdn) ) { \
+			slapd_shutdown = 2; \
+		} \
+	} \
+} while (0)
+
+# define SLAP_DEVPOLL_SOCK_SET(t,s, mode) 	do { \
+	Debug( LDAP_DEBUG_CONNS, "SLAP_SOCK_SET_%s(%d)=%d\n", \
+		(mode) == POLLIN ? "READ" : "WRITE", (s), \
+		( (SLAP_DEVPOLL_SOCK_EV(t,(s)) & (mode)) != (mode) ) ); \
+	if ( (SLAP_DEVPOLL_SOCK_EV(t,(s)) & (mode)) != (mode) ) { \
+		struct pollfd pfd; \
+		SLAP_DEVPOLL_SOCK_EV(t,(s)) |= (mode); \
+		pfd.fd = SLAP_DEVPOLL_SOCK_FD(t,(s)); \
+		pfd.events = /* (mode) */ SLAP_DEVPOLL_SOCK_EV(t,(s)); \
+		SLAP_DEVPOLL_WRITE_POLLFD(t,(s), &pfd, 1, "SET", 0); \
+	} \
+} while (0)
+
+# define SLAP_DEVPOLL_SOCK_CLR(t,s, mode)		do { \
+	Debug( LDAP_DEBUG_CONNS, "SLAP_SOCK_CLR_%s(%d)=%d\n", \
+		(mode) == POLLIN ? "READ" : "WRITE", (s), \
+		( (SLAP_DEVPOLL_SOCK_EV(t,(s)) & (mode)) == (mode) ) ); \
+	if ((SLAP_DEVPOLL_SOCK_EV(t,(s)) & (mode)) == (mode) ) { \
+		struct pollfd pfd[2]; \
+		SLAP_DEVPOLL_SOCK_EV(t,(s)) &= ~(mode); \
+		pfd[0].fd = SLAP_DEVPOLL_SOCK_FD(t,(s)); \
+		pfd[0].events = POLLREMOVE; \
+		pfd[1] = SLAP_DEVPOLL_SOCK_EP(t,(s)); \
+		SLAP_DEVPOLL_WRITE_POLLFD(t,(s), &pfd[0], 2, "CLR", 0); \
+	} \
+} while (0)
+
+# define SLAP_SOCK_SET_READ(t,s)		SLAP_DEVPOLL_SOCK_SET(t,s, POLLIN)
+# define SLAP_SOCK_SET_WRITE(t,s)		SLAP_DEVPOLL_SOCK_SET(t,s, POLLOUT)
+
+# define SLAP_SOCK_CLR_READ(t,s)		SLAP_DEVPOLL_SOCK_CLR(t,(s), POLLIN)
+# define SLAP_SOCK_CLR_WRITE(t,s)		SLAP_DEVPOLL_SOCK_CLR(t,(s), POLLOUT)
+
+#  define SLAP_SOCK_SET_SUSPEND(t,s) \
+	( slap_daemon[t].sd_suspend[SLAP_DEVPOLL_SOCK_IX(t,(s))] = 1 )
+#  define SLAP_SOCK_CLR_SUSPEND(t,s) \
+	( slap_daemon[t].sd_suspend[SLAP_DEVPOLL_SOCK_IX(t,(s))] = 0 )
+#  define SLAP_SOCK_IS_SUSPEND(t,s) \
+	( slap_daemon[t].sd_suspend[SLAP_DEVPOLL_SOCK_IX(t,(s))] == 1 )
+
+# define SLAP_DEVPOLL_EVENT_CLR(i, mode)	(revents[(i)].events &= ~(mode))
+
+# define SLAP_EVENT_MAX(t)			slap_daemon[t].sd_nfds
+
+/* If a Listener address is provided, store that in the sd_l array.
+ * If we can't do this add, the system is out of resources and we 
+ * need to shutdown.
+ */
+# define SLAP_SOCK_ADD(t, s, l)		do { \
+	Debug( LDAP_DEBUG_CONNS, "SLAP_SOCK_ADD(%d, %p)\n", (s), (l) ); \
+	SLAP_DEVPOLL_SOCK_IX(t,(s)) = slap_daemon[t].sd_nfds; \
+	SLAP_DEVPOLL_SOCK_LX(t,(s)) = (l); \
+	SLAP_DEVPOLL_SOCK_FD(t,(s)) = (s); \
+	SLAP_DEVPOLL_SOCK_EV(t,(s)) = POLLIN; \
+	SLAP_DEVPOLL_WRITE_POLLFD(t,(s), &SLAP_DEVPOLL_SOCK_EP(t, (s)), 1, "ADD", 1); \
+	slap_daemon[t].sd_nfds++; \
+} while (0)
+
+# define SLAP_DEVPOLL_EV_LISTENER(ptr)	((ptr) != NULL)
+
+# define SLAP_SOCK_DEL(t,s)		do { \
+	int fd, index = SLAP_DEVPOLL_SOCK_IX(t,(s)); \
+	Debug( LDAP_DEBUG_CONNS, "SLAP_SOCK_DEL(%d)\n", (s) ); \
+	if ( index < 0 ) break; \
+	if ( index < slap_daemon[t].sd_nfds - 1 ) { \
+		struct pollfd pfd = slap_daemon[t].sd_pollfd[index]; \
+		fd = slap_daemon[t].sd_pollfd[slap_daemon[t].sd_nfds - 1].fd; \
+		slap_daemon[t].sd_pollfd[index] = slap_daemon[t].sd_pollfd[slap_daemon[t].sd_nfds - 1]; \
+		slap_daemon[t].sd_pollfd[slap_daemon[t].sd_nfds - 1] = pfd; \
+		slap_daemon[t].sd_index[fd] = index; \
+	} \
+	slap_daemon[t].sd_index[(s)] = -1; \
+	slap_daemon[t].sd_pollfd[slap_daemon[t].sd_nfds - 1].events = POLLREMOVE; \
+	SLAP_DEVPOLL_WRITE_POLLFD(t,(s), &slap_daemon[t].sd_pollfd[slap_daemon[t].sd_nfds - 1], 1, "DEL", 0); \
+	slap_daemon[t].sd_pollfd[slap_daemon[t].sd_nfds - 1].events = 0; \
+	slap_daemon[t].sd_nfds--; \
+} while (0)
+
+# define SLAP_EVENT_CLR_READ(i)		SLAP_DEVPOLL_EVENT_CLR((i), POLLIN)
+# define SLAP_EVENT_CLR_WRITE(i)	SLAP_DEVPOLL_EVENT_CLR((i), POLLOUT)
+
+# define SLAP_DEVPOLL_EVENT_CHK(i, mode)	(revents[(i)].events & (mode))
+
+# define SLAP_EVENT_FD(t,i)		(revents[(i)].fd)
+
+# define SLAP_EVENT_IS_READ(i)		SLAP_DEVPOLL_EVENT_CHK((i), POLLIN)
+# define SLAP_EVENT_IS_WRITE(i)		SLAP_DEVPOLL_EVENT_CHK((i), POLLOUT)
+# define SLAP_EVENT_IS_LISTENER(t,i)	SLAP_DEVPOLL_EV_LISTENER(SLAP_DEVPOLL_SOCK_LX(t, SLAP_EVENT_FD(t,(i))))
+# define SLAP_EVENT_LISTENER(t,i)		SLAP_DEVPOLL_SOCK_LX(t, SLAP_EVENT_FD(t,(i)))
+
+# define SLAP_SOCK_DESTROY(t)		do { \
+	if ( slap_daemon[t].sd_pollfd != NULL ) { \
+		ch_free( slap_daemon[t].sd_pollfd ); \
+		slap_daemon[t].sd_pollfd = NULL; \
+		slap_daemon[t].sd_index = NULL; \
+		slap_daemon[t].sd_l = NULL; \
+		close( slap_daemon[t].sd_dpfd ); \
+	} \
+} while ( 0 )
+
+# define SLAP_SOCK_INIT(t)		do { \
+	slap_daemon[t].sd_pollfd = ch_calloc( 1, \
+		( sizeof(struct pollfd) * 2 \
+			+ sizeof( int ) \
+			+ sizeof( Listener * ) ) * dtblsize ); \
+	slap_daemon[t].sd_index = (int *)&slap_daemon[t].sd_pollfd[ 2 * dtblsize ]; \
+	slap_daemon[t].sd_l = (Listener **)&slap_daemon[t].sd_index[ dtblsize ]; \
+	slap_daemon[t].sd_dpfd = open( SLAP_EVENT_FNAME, O_RDWR ); \
+	if ( slap_daemon[t].sd_dpfd == -1 ) { \
+		int saved_errno = errno; \
+		Debug( LDAP_DEBUG_ANY, "daemon: " SLAP_EVENT_FNAME ": " \
+			"open(\"" SLAP_EVENT_FNAME "\") failed errno=%d\n", \
+			saved_errno ); \
+		SLAP_SOCK_DESTROY(t); \
+		return -1; \
+	} \
+	for ( i = 0; i < dtblsize; i++ ) { \
+		slap_daemon[t].sd_pollfd[i].fd = -1; \
+		slap_daemon[t].sd_index[i] = -1; \
+	} \
+} while (0)
+
+# define SLAP_SOCK_INIT2()
+
+# define SLAP_EVENT_DECL		struct pollfd *revents
+
+# define SLAP_EVENT_INIT(t)		do { \
+	revents = &slap_daemon[t].sd_pollfd[ dtblsize ]; \
+} while (0)
+
+# define SLAP_EVENT_WAIT(t, tvp, nsp)	do { \
+	struct dvpoll		sd_dvpoll; \
+	sd_dvpoll.dp_timeout = (tvp) ? ((tvp)->tv_sec * 1000 + (tvp)->tv_usec / 1000) : -1; \
+	sd_dvpoll.dp_nfds = dtblsize; \
+	sd_dvpoll.dp_fds = revents; \
+	*(nsp) = ioctl( slap_daemon[t].sd_dpfd, DP_POLL, &sd_dvpoll ); \
+} while (0)
+
+#else /* ! kqueue && ! epoll && ! /dev/poll */
+# ifdef HAVE_WINSOCK
+# define SLAP_EVENT_FNAME		"WSselect"
+/* Winsock provides a "select" function but its fd_sets are
+ * actually arrays of sockets. Since these sockets are handles
+ * and not a contiguous range of small integers, we manage our
+ * own "fd" table of socket handles and use their indices as
+ * descriptors.
+ *
+ * All of our listener/connection structures use fds; the actual
+ * I/O functions use sockets. The SLAP_FD2SOCK macro in proto-slap.h
+ * handles the mapping.
+ *
+ * Despite the mapping overhead, this is about 45% more efficient
+ * than just using Winsock's select and FD_ISSET directly.
+ *
+ * Unfortunately Winsock's select implementation doesn't scale well
+ * as the number of connections increases. This probably needs to be
+ * rewritten to use the Winsock overlapped/asynchronous I/O functions.
+ */
+# define SLAP_EVENTS_ARE_INDEXED	1
+# define SLAP_EVENT_DECL		fd_set readfds, writefds; char *rflags
+# define SLAP_EVENT_INIT(t)	do { \
+	int i; \
+	FD_ZERO( &readfds ); \
+	FD_ZERO( &writefds ); \
+	rflags = slap_daemon[t].sd_rflags; \
+	memset( rflags, 0, slap_daemon[t].sd_nfds ); \
+	for ( i=0; i<slap_daemon[t].sd_nfds; i++ ) { \
+		if ( slap_daemon[t].sd_flags[i] & SD_READ ) \
+			FD_SET( slapd_ws_sockets[i], &readfds );\
+		if ( slap_daemon[t].sd_flags[i] & SD_WRITE ) \
+			FD_SET( slapd_ws_sockets[i], &writefds ); \
+	} } while ( 0 )
+
+# define SLAP_EVENT_MAX(t)		slap_daemon[t].sd_nfds
+
+# define SLAP_EVENT_WAIT(t, tvp, nsp)	do { \
+	int i; \
+	*(nsp) = select( SLAP_EVENT_MAX(t), &readfds, \
+		nwriters > 0 ? &writefds : NULL, NULL, (tvp) ); \
+	for ( i=0; i<readfds.fd_count; i++) { \
+		int fd = slapd_sock2fd(readfds.fd_array[i]); \
+		if ( fd >= 0 ) { \
+			slap_daemon[t].sd_rflags[fd] = SD_READ; \
+			if ( fd >= *(nsp)) *(nsp) = fd+1; \
+		} \
+	} \
+	for ( i=0; i<writefds.fd_count; i++) { \
+		int fd = slapd_sock2fd(writefds.fd_array[i]); \
+		if ( fd >= 0 ) { \
+			slap_daemon[t].sd_rflags[fd] = SD_WRITE; \
+			if ( fd >= *(nsp)) *(nsp) = fd+1; \
+		} \
+	} \
+} while (0)
+
+# define SLAP_EVENT_IS_READ(fd)		(rflags[fd] & SD_READ)
+# define SLAP_EVENT_IS_WRITE(fd)	(rflags[fd] & SD_WRITE)
+
+# define SLAP_EVENT_CLR_READ(fd) 	rflags[fd] &= ~SD_READ
+# define SLAP_EVENT_CLR_WRITE(fd)	rflags[fd] &= ~SD_WRITE
+
+# define SLAP_SOCK_INIT(t)		do { \
+	if (!t) { \
+	ldap_pvt_thread_mutex_init( &slapd_ws_mutex ); \
+	slapd_ws_sockets = ch_malloc( dtblsize * ( sizeof(SOCKET) + 2)); \
+	memset( slapd_ws_sockets, -1, dtblsize * sizeof(SOCKET) ); \
+	} \
+	slap_daemon[t].sd_flags = (char *)(slapd_ws_sockets + dtblsize); \
+	slap_daemon[t].sd_rflags = slap_daemon[t].sd_flags + dtblsize; \
+	memset( slap_daemon[t].sd_flags, 0, dtblsize ); \
+	slapd_ws_sockets[t*2] = wake_sds[t][0]; \
+	slapd_ws_sockets[t*2+1] = wake_sds[t][1]; \
+	wake_sds[t][0] = t*2; \
+	wake_sds[t][1] = t*2+1; \
+	slap_daemon[t].sd_nfds = t*2 + 2; \
+	} while ( 0 )
+
+# define SLAP_SOCK_INIT2()
+
+# define SLAP_SOCK_DESTROY(t)	do { \
+	ch_free( slapd_ws_sockets ); slapd_ws_sockets = NULL; \
+	slap_daemon[t].sd_flags = NULL; \
+	slap_daemon[t].sd_rflags = NULL; \
+	ldap_pvt_thread_mutex_destroy( &slapd_ws_mutex ); \
+	} while ( 0 )
+
+# define SLAP_SOCK_IS_ACTIVE(t,fd) ( slap_daemon[t].sd_flags[fd] & SD_ACTIVE )
+# define SLAP_SOCK_IS_READ(t,fd) ( slap_daemon[t].sd_flags[fd] & SD_READ )
+# define SLAP_SOCK_IS_WRITE(t,fd) ( slap_daemon[t].sd_flags[fd] & SD_WRITE )
+# define SLAP_SOCK_NOT_ACTIVE(t,fd)	(!slap_daemon[t].sd_flags[fd])
+
+# define SLAP_SOCK_SET_READ(t,fd)		( slap_daemon[t].sd_flags[fd] |= SD_READ )
+# define SLAP_SOCK_SET_WRITE(t,fd)		( slap_daemon[t].sd_flags[fd] |= SD_WRITE )
+
+# define SLAP_SELECT_ADDTEST(t,s)	do { \
+	if ((s) >= slap_daemon[t].sd_nfds) slap_daemon[t].sd_nfds = (s)+1; \
+} while (0)
+
+# define SLAP_SOCK_CLR_READ(t,fd)		( slap_daemon[t].sd_flags[fd] &= ~SD_READ )
+# define SLAP_SOCK_CLR_WRITE(t,fd)		( slap_daemon[t].sd_flags[fd] &= ~SD_WRITE )
+
+# define SLAP_SOCK_ADD(t,s, l)	do { \
+	SLAP_SELECT_ADDTEST(t,(s)); \
+	slap_daemon[t].sd_flags[s] = SD_ACTIVE|SD_READ; \
+} while ( 0 )
+
+# define SLAP_SOCK_DEL(t,s) do { \
+	slap_daemon[t].sd_flags[s] = 0; \
+	slapd_sockdel( s ); \
+} while ( 0 )
+
+# else /* !HAVE_WINSOCK */
+
+/**************************************
+ * Use select system call - select(2) *
+ **************************************/
+# define SLAP_EVENT_FNAME		"select"
+/* select */
+# define SLAP_EVENTS_ARE_INDEXED	1
+# define SLAP_EVENT_DECL		fd_set readfds, writefds
+
+# define SLAP_EVENT_INIT(t)		do { \
+	AC_MEMCPY( &readfds, &slap_daemon[t].sd_readers, sizeof(fd_set) );	\
+	if ( nwriters )	{ \
+		AC_MEMCPY( &writefds, &slap_daemon[t].sd_writers, sizeof(fd_set) ); \
+	} else { \
+		FD_ZERO( &writefds ); \
+	} \
+} while (0)
+
+# ifdef FD_SETSIZE
+#  define SLAP_SELECT_CHK_SETSIZE	do { \
+	if (dtblsize > FD_SETSIZE) dtblsize = FD_SETSIZE; \
+} while (0)
+# else /* ! FD_SETSIZE */
+#  define SLAP_SELECT_CHK_SETSIZE	do { ; } while (0)
+# endif /* ! FD_SETSIZE */
+
+# define SLAP_SOCK_INIT(t)			do { \
+	SLAP_SELECT_CHK_SETSIZE; \
+	FD_ZERO(&slap_daemon[t].sd_actives); \
+	FD_ZERO(&slap_daemon[t].sd_readers); \
+	FD_ZERO(&slap_daemon[t].sd_writers); \
+} while (0)
+
+# define SLAP_SOCK_INIT2()
+
+# define SLAP_SOCK_DESTROY(t)
+
+# define SLAP_SOCK_IS_ACTIVE(t,fd)	FD_ISSET((fd), &slap_daemon[t].sd_actives)
+# define SLAP_SOCK_IS_READ(t,fd)		FD_ISSET((fd), &slap_daemon[t].sd_readers)
+# define SLAP_SOCK_IS_WRITE(t,fd)		FD_ISSET((fd), &slap_daemon[t].sd_writers)
+
+# define SLAP_SOCK_NOT_ACTIVE(t,fd)	(!SLAP_SOCK_IS_ACTIVE(t,fd) && \
+	 !SLAP_SOCK_IS_READ(t,fd) && !SLAP_SOCK_IS_WRITE(t,fd))
+
+# define SLAP_SOCK_SET_READ(t,fd)	FD_SET((fd), &slap_daemon[t].sd_readers)
+# define SLAP_SOCK_SET_WRITE(t,fd)	FD_SET((fd), &slap_daemon[t].sd_writers)
+
+# define SLAP_EVENT_MAX(t)		slap_daemon[t].sd_nfds
+# define SLAP_SELECT_ADDTEST(t,s)	do { \
+	if ((s) >= slap_daemon[t].sd_nfds) slap_daemon[t].sd_nfds = (s)+1; \
+} while (0)
+
+# define SLAP_SOCK_CLR_READ(t,fd)		FD_CLR((fd), &slap_daemon[t].sd_readers)
+# define SLAP_SOCK_CLR_WRITE(t,fd)	FD_CLR((fd), &slap_daemon[t].sd_writers)
+
+# define SLAP_SOCK_ADD(t,s, l)		do { \
+	SLAP_SELECT_ADDTEST(t,(s)); \
+	FD_SET((s), &slap_daemon[t].sd_actives); \
+	FD_SET((s), &slap_daemon[t].sd_readers); \
+} while (0)
+
+# define SLAP_SOCK_DEL(t,s)		do { \
+	FD_CLR((s), &slap_daemon[t].sd_actives); \
+	FD_CLR((s), &slap_daemon[t].sd_readers); \
+	FD_CLR((s), &slap_daemon[t].sd_writers); \
+} while (0)
+
+# define SLAP_EVENT_IS_READ(fd)		FD_ISSET((fd), &readfds)
+# define SLAP_EVENT_IS_WRITE(fd)	FD_ISSET((fd), &writefds)
+
+# define SLAP_EVENT_CLR_READ(fd) 	FD_CLR((fd), &readfds)
+# define SLAP_EVENT_CLR_WRITE(fd)	FD_CLR((fd), &writefds)
+
+# define SLAP_EVENT_WAIT(t, tvp, nsp)	do { \
+	*(nsp) = select( SLAP_EVENT_MAX(t), &readfds, \
+		nwriters > 0 ? &writefds : NULL, NULL, (tvp) ); \
+} while (0)
+# endif /* !HAVE_WINSOCK */
+#endif /* ! kqueue && ! epoll && ! /dev/poll */
+
+#ifdef HAVE_SLP
+/*
+ * SLP related functions
+ */
+#include <slp.h>
+
+#define LDAP_SRVTYPE_PREFIX "service:ldap://"
+#define LDAPS_SRVTYPE_PREFIX "service:ldaps://"
+static char** slapd_srvurls = NULL;
+static SLPHandle slapd_hslp = 0;
+int slapd_register_slp = 0;
+const char *slapd_slp_attrs = NULL;
+
+static SLPError slapd_slp_cookie;
+
+static void
+slapd_slp_init( const char* urls )
+{
+	int i;
+	SLPError err;
+
+	slapd_srvurls = ldap_str2charray( urls, " " );
+
+	if ( slapd_srvurls == NULL ) return;
+
+	/* find and expand INADDR_ANY URLs */
+	for ( i = 0; slapd_srvurls[i] != NULL; i++ ) {
+		if ( strcmp( slapd_srvurls[i], "ldap:///" ) == 0 ) {
+			slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i],
+				global_host_bv.bv_len +
+				sizeof( LDAP_SRVTYPE_PREFIX ) );
+			strcpy( lutil_strcopy(slapd_srvurls[i],
+				LDAP_SRVTYPE_PREFIX ), global_host_bv.bv_val );
+		} else if ( strcmp( slapd_srvurls[i], "ldaps:///" ) == 0 ) {
+			slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i],
+				global_host_bv.bv_len +
+				sizeof( LDAPS_SRVTYPE_PREFIX ) );
+			strcpy( lutil_strcopy(slapd_srvurls[i],
+				LDAPS_SRVTYPE_PREFIX ), global_host_bv.bv_val );
+		}
+	}
+
+	/* open the SLP handle */
+	err = SLPOpen( "en", 0, &slapd_hslp );
+
+	if ( err != SLP_OK ) {
+		Debug( LDAP_DEBUG_CONNS, "daemon: SLPOpen() failed with %ld\n",
+			(long)err );
+	}
+}
+
+static void
+slapd_slp_deinit( void )
+{
+	if ( slapd_srvurls == NULL ) return;
+
+	ldap_charray_free( slapd_srvurls );
+	slapd_srvurls = NULL;
+
+	/* close the SLP handle */
+	SLPClose( slapd_hslp );
+}
+
+static void
+slapd_slp_regreport(
+	SLPHandle	hslp,
+	SLPError	errcode,
+	void		*cookie )
+{
+	/* return the error code in the cookie */
+	*(SLPError*)cookie = errcode; 
+}
+
+static void
+slapd_slp_reg()
+{
+	int i;
+	SLPError err;
+
+	if ( slapd_srvurls == NULL ) return;
+
+	for ( i = 0; slapd_srvurls[i] != NULL; i++ ) {
+		if ( strncmp( slapd_srvurls[i], LDAP_SRVTYPE_PREFIX,
+				sizeof( LDAP_SRVTYPE_PREFIX ) - 1 ) == 0 ||
+			strncmp( slapd_srvurls[i], LDAPS_SRVTYPE_PREFIX,
+				sizeof( LDAPS_SRVTYPE_PREFIX ) - 1 ) == 0 )
+		{
+			err = SLPReg( slapd_hslp,
+				slapd_srvurls[i],
+				SLP_LIFETIME_MAXIMUM,
+				"ldap",
+				(slapd_slp_attrs) ? slapd_slp_attrs : "",
+				SLP_TRUE,
+				slapd_slp_regreport,
+				&slapd_slp_cookie );
+
+			if ( err != SLP_OK || slapd_slp_cookie != SLP_OK ) {
+				Debug( LDAP_DEBUG_CONNS,
+					"daemon: SLPReg(%s) failed with %ld, cookie = %ld\n",
+					slapd_srvurls[i], (long)err, (long)slapd_slp_cookie );
+			}	
+		}
+	}
+}
+
+static void
+slapd_slp_dereg( void )
+{
+	int i;
+	SLPError err;
+
+	if ( slapd_srvurls == NULL ) return;
+
+	for ( i = 0; slapd_srvurls[i] != NULL; i++ ) {
+		err = SLPDereg( slapd_hslp,
+			slapd_srvurls[i],
+			slapd_slp_regreport,
+			&slapd_slp_cookie );
+		
+		if ( err != SLP_OK || slapd_slp_cookie != SLP_OK ) {
+			Debug( LDAP_DEBUG_CONNS,
+				"daemon: SLPDereg(%s) failed with %ld, cookie = %ld\n",
+				slapd_srvurls[i], (long)err, (long)slapd_slp_cookie );
+		}
+	}
+}
+#endif /* HAVE_SLP */
+
+#ifdef HAVE_WINSOCK
+/* Manage the descriptor to socket table */
+ber_socket_t
+slapd_socknew( ber_socket_t s )
+{
+	ber_socket_t i;
+	ldap_pvt_thread_mutex_lock( &slapd_ws_mutex );
+	for ( i = 0; i < dtblsize && slapd_ws_sockets[i] != INVALID_SOCKET; i++ );
+	if ( i == dtblsize ) {
+		WSASetLastError( WSAEMFILE );
+	} else {
+		slapd_ws_sockets[i] = s;
+	}
+	ldap_pvt_thread_mutex_unlock( &slapd_ws_mutex );
+	return i;
+}
+
+void
+slapd_sockdel( ber_socket_t s )
+{
+	ldap_pvt_thread_mutex_lock( &slapd_ws_mutex );
+	slapd_ws_sockets[s] = INVALID_SOCKET;
+	ldap_pvt_thread_mutex_unlock( &slapd_ws_mutex );
+}
+
+ber_socket_t
+slapd_sock2fd( ber_socket_t s )
+{
+	ber_socket_t i;
+	for ( i=0; i<dtblsize && slapd_ws_sockets[i] != s; i++);
+	if ( i == dtblsize )
+		i = -1;
+	return i;
+}
+#endif
+
+#ifdef DEBUG_CLOSE
+/* Was used to find a bug causing slapd's descriptors to be closed
+ * out from under it. Tracked it down to a long-standing (from 2009)
+ * bug in Heimdal https://github.com/heimdal/heimdal/issues/431 .
+ * Leaving this here for future use, if necessary.
+ */
+#include <dlfcn.h>
+#ifndef RTLD_NEXT
+#define RTLD_NEXT	(void *)-1L
+#endif
+static char *newconns;
+typedef int (closefunc)(int fd);
+static closefunc *close_ptr;
+int close( int s )
+{
+	if (newconns) {
+		Debug( LDAP_DEBUG_CONNS,
+			"daemon: close(%d)\n", s );
+		if (s >= 0 && s < dtblsize && newconns[s])
+			assert(newconns[s] == 2);
+	}
+	return close_ptr ? close_ptr(s) : -1;
+}
+
+void slapd_debug_close()
+{
+	if (dtblsize)
+		newconns = ch_calloc(1, dtblsize);
+	close_ptr = dlsym(RTLD_NEXT, "close");
+}
+
+void slapd_set_close(int fd)
+{
+	newconns[fd] = 3;
+}
+#define SETUP_CLOSE()	slapd_debug_close()
+#define SET_CLOSE(fd)	slapd_set_close(fd)
+#define CLR_CLOSE(fd)	if (newconns[fd]) newconns[fd]--
+#else
+#define SETUP_CLOSE(fd)
+#define SET_CLOSE(fd)
+#define CLR_CLOSE(fd)
+#endif
+
+/*
+ * Add a descriptor to daemon control
+ *
+ * If isactive, the descriptor is a live server session and is subject
+ * to idletimeout control. Otherwise, the descriptor is a passive
+ * listener or an outbound client session, and not subject to
+ * idletimeout. The underlying event handler may record the Listener
+ * argument to differentiate Listener's from real sessions.
+ */
+static void
+slapd_add( ber_socket_t s, int isactive, Listener *sl, int id )
+{
+	if (id < 0)
+		id = DAEMON_ID(s);
+	ldap_pvt_thread_mutex_lock( &slap_daemon[id].sd_mutex );
+
+	assert( SLAP_SOCK_NOT_ACTIVE(id, s) );
+
+	if ( isactive ) slap_daemon[id].sd_nactives++;
+
+	SLAP_SOCK_ADD(id, s, sl);
+
+	Debug( LDAP_DEBUG_CONNS, "daemon: added %ldr%s listener=%p\n",
+		(long) s, isactive ? " (active)" : "", (void *)sl );
+
+	ldap_pvt_thread_mutex_unlock( &slap_daemon[id].sd_mutex );
+
+	WAKE_LISTENER(id,1);
+}
+
+/*
+ * Remove the descriptor from daemon control
+ */
+void
+slapd_remove(
+	ber_socket_t s,
+	Sockbuf *sb,
+	int wasactive,
+	int wake,
+	int locked )
+{
+	int waswriter;
+	int wasreader;
+	int id = DAEMON_ID(s);
+
+	if ( !locked )
+		ldap_pvt_thread_mutex_lock( &slap_daemon[id].sd_mutex );
+
+	assert( SLAP_SOCK_IS_ACTIVE( id, s ));
+
+	if ( wasactive ) slap_daemon[id].sd_nactives--;
+
+	waswriter = SLAP_SOCK_IS_WRITE(id, s);
+	wasreader = SLAP_SOCK_IS_READ(id, s);
+
+	Debug( LDAP_DEBUG_CONNS, "daemon: removing %ld%s%s\n",
+		(long) s,
+		wasreader ? "r" : "",
+		waswriter ? "w" : "" );
+
+	if ( waswriter ) slap_daemon[id].sd_nwriters--;
+
+	SLAP_SOCK_DEL(id, s);
+	CLR_CLOSE(s);
+
+	if ( sb )
+		ber_sockbuf_free(sb);
+
+	/* If we ran out of file descriptors, we dropped a listener from
+	 * the select() loop. Now that we're removing a session from our
+	 * control, we can try to resume a dropped listener to use.
+	 */
+	ldap_pvt_thread_mutex_lock( &emfile_mutex );
+	if ( emfile && listening ) {
+		int i;
+		for ( i = 0; slap_listeners[i] != NULL; i++ ) {
+			Listener *lr = slap_listeners[i];
+
+			if ( lr->sl_sd == AC_SOCKET_INVALID ) continue;
+			if ( lr->sl_sd == s ) continue;
+			if ( lr->sl_mute ) {
+				lr->sl_mute = 0;
+				emfile--;
+				if ( DAEMON_ID(lr->sl_sd) != id )
+					WAKE_LISTENER(DAEMON_ID(lr->sl_sd), wake);
+				break;
+			}
+		}
+		/* Walked the entire list without enabling anything; emfile
+		 * counter is stale. Reset it.
+		 */
+		if ( slap_listeners[i] == NULL ) emfile = 0;
+	}
+	ldap_pvt_thread_mutex_unlock( &emfile_mutex );
+	ldap_pvt_thread_mutex_unlock( &slap_daemon[id].sd_mutex );
+	WAKE_LISTENER(id, wake || slapd_gentle_shutdown == 2);
+}
+
+void
+slapd_clr_write( ber_socket_t s, int wake )
+{
+	int id = DAEMON_ID(s);
+	ldap_pvt_thread_mutex_lock( &slap_daemon[id].sd_mutex );
+
+	if ( SLAP_SOCK_IS_WRITE( id, s )) {
+		assert( SLAP_SOCK_IS_ACTIVE( id, s ));
+
+		SLAP_SOCK_CLR_WRITE( id, s );
+		slap_daemon[id].sd_nwriters--;
+	}
+
+	ldap_pvt_thread_mutex_unlock( &slap_daemon[id].sd_mutex );
+	WAKE_LISTENER(id,wake);
+}
+
+void
+slapd_set_write( ber_socket_t s, int wake )
+{
+	int id = DAEMON_ID(s);
+	ldap_pvt_thread_mutex_lock( &slap_daemon[id].sd_mutex );
+
+	assert( SLAP_SOCK_IS_ACTIVE( id, s ));
+
+	if ( !SLAP_SOCK_IS_WRITE( id, s )) {
+		SLAP_SOCK_SET_WRITE( id, s );
+		slap_daemon[id].sd_nwriters++;
+	}
+
+	ldap_pvt_thread_mutex_unlock( &slap_daemon[id].sd_mutex );
+	WAKE_LISTENER(id,wake);
+}
+
+int
+slapd_clr_read( ber_socket_t s, int wake )
+{
+	int rc = 1;
+	int id = DAEMON_ID(s);
+	ldap_pvt_thread_mutex_lock( &slap_daemon[id].sd_mutex );
+
+	if ( SLAP_SOCK_IS_ACTIVE( id, s )) {
+		SLAP_SOCK_CLR_READ( id, s );
+		rc = 0;
+	}
+	ldap_pvt_thread_mutex_unlock( &slap_daemon[id].sd_mutex );
+	if ( !rc )
+		WAKE_LISTENER(id,wake);
+	return rc;
+}
+
+void
+slapd_set_read( ber_socket_t s, int wake )
+{
+	int do_wake = 1;
+	int id = DAEMON_ID(s);
+	ldap_pvt_thread_mutex_lock( &slap_daemon[id].sd_mutex );
+
+	if( SLAP_SOCK_IS_ACTIVE( id, s ) && !SLAP_SOCK_IS_READ( id, s )) {
+		SLAP_SOCK_SET_READ( id, s );
+	} else {
+		do_wake = 0;
+	}
+	ldap_pvt_thread_mutex_unlock( &slap_daemon[id].sd_mutex );
+	if ( do_wake )
+		WAKE_LISTENER(id,wake);
+}
+
+static void
+slapd_close( ber_socket_t s )
+{
+	Debug( LDAP_DEBUG_CONNS, "daemon: closing %ld\n",
+		(long) s );
+	CLR_CLOSE( SLAP_FD2SOCK(s) );
+	tcp_close( SLAP_FD2SOCK(s) );
+#ifdef HAVE_WINSOCK
+	slapd_sockdel( s );
+#endif
+}
+
+void
+slapd_shutsock( ber_socket_t s )
+{
+	Debug( LDAP_DEBUG_CONNS, "daemon: shutdown socket %ld\n",
+		(long) s );
+	shutdown( SLAP_FD2SOCK(s), 2 );
+}
+
+static void
+slap_free_listener_addresses( struct sockaddr **sal )
+{
+	struct sockaddr **sap;
+	if (sal == NULL) return;
+	for (sap = sal; *sap != NULL; sap++) ch_free(*sap);
+	ch_free(sal);
+}
+
+#if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
+static int
+get_url_perms(
+	char 	**exts,
+	mode_t	*perms,
+	int	*crit )
+{
+	int	i;
+
+	assert( exts != NULL );
+	assert( perms != NULL );
+	assert( crit != NULL );
+
+	*crit = 0;
+	for ( i = 0; exts[ i ]; i++ ) {
+		char	*type = exts[ i ];
+		int	c = 0;
+
+		if ( type[ 0 ] == '!' ) {
+			c = 1;
+			type++;
+		}
+
+		if ( strncasecmp( type, LDAPI_MOD_URLEXT "=",
+			sizeof(LDAPI_MOD_URLEXT "=") - 1 ) == 0 )
+		{
+			char *value = type + ( sizeof(LDAPI_MOD_URLEXT "=") - 1 );
+			mode_t p = 0;
+			int j;
+
+			switch (strlen(value)) {
+			case 4:
+				/* skip leading '0' */
+				if ( value[ 0 ] != '0' ) return LDAP_OTHER;
+				value++;
+
+			case 3:
+				for ( j = 0; j < 3; j++) {
+					int	v;
+
+					v = value[ j ] - '0';
+
+					if ( v < 0 || v > 7 ) return LDAP_OTHER;
+
+					p |= v << 3*(2-j);
+				}
+				break;
+
+			case 10:
+				for ( j = 1; j < 10; j++ ) {
+					static mode_t	m[] = { 0, 
+						S_IRUSR, S_IWUSR, S_IXUSR,
+						S_IRGRP, S_IWGRP, S_IXGRP,
+						S_IROTH, S_IWOTH, S_IXOTH
+					};
+					static const char	c[] = "-rwxrwxrwx"; 
+
+					if ( value[ j ] == c[ j ] ) {
+						p |= m[ j ];
+	
+					} else if ( value[ j ] != '-' ) {
+						return LDAP_OTHER;
+					}
+				}
+				break;
+
+			default:
+				return LDAP_OTHER;
+			} 
+
+			*crit = c;
+			*perms = p;
+
+			return LDAP_SUCCESS;
+		}
+	}
+
+	return LDAP_OTHER;
+}
+#endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
+
+/* port = 0 indicates AF_LOCAL */
+static int
+slap_get_listener_addresses(
+	const char *host,
+	unsigned short port,
+	struct sockaddr ***sal )
+{
+	struct sockaddr **sap;
+
+#ifdef LDAP_PF_LOCAL
+	if ( port == 0 ) {
+		sap = *sal = ch_malloc(2 * sizeof(void *));
+
+		*sap = ch_malloc(sizeof(struct sockaddr_un));
+		sap[1] = NULL;
+
+		if ( strlen(host) >
+			(sizeof(((struct sockaddr_un *)*sap)->sun_path) - 1) )
+		{
+			Debug( LDAP_DEBUG_ANY,
+				"daemon: domain socket path (%s) too long in URL",
+				host );
+			goto errexit;
+		}
+
+		(void)memset( (void *)*sap, '\0', sizeof(struct sockaddr_un) );
+		(*sap)->sa_family = AF_LOCAL;
+		strcpy( ((struct sockaddr_un *)*sap)->sun_path, host );
+	} else
+#endif /* LDAP_PF_LOCAL */
+	{
+#ifdef HAVE_GETADDRINFO
+		struct addrinfo hints, *res, *sai;
+		int n, err;
+		char serv[7];
+
+		memset( &hints, '\0', sizeof(hints) );
+		hints.ai_flags = AI_PASSIVE;
+		hints.ai_socktype = SOCK_STREAM;
+		hints.ai_family = slap_inet4or6;
+		snprintf(serv, sizeof serv, "%d", port);
+
+		if ( (err = getaddrinfo(host, serv, &hints, &res)) ) {
+			Debug( LDAP_DEBUG_ANY, "daemon: getaddrinfo() failed: %s\n",
+				AC_GAI_STRERROR(err) );
+			return -1;
+		}
+
+		sai = res;
+		for (n=2; (sai = sai->ai_next) != NULL; n++) {
+			/* EMPTY */ ;
+		}
+		sap = *sal = ch_calloc(n, sizeof(void *));
+		*sap = NULL;
+
+		for ( sai=res; sai; sai=sai->ai_next ) {
+			if( sai->ai_addr == NULL ) {
+				Debug( LDAP_DEBUG_ANY, "slap_get_listener_addresses: "
+					"getaddrinfo ai_addr is NULL?\n" );
+				freeaddrinfo(res);
+				goto errexit;
+			}
+
+			switch (sai->ai_family) {
+#  ifdef LDAP_PF_INET6
+			case AF_INET6:
+				*sap = ch_malloc(sizeof(struct sockaddr_in6));
+				*(struct sockaddr_in6 *)*sap =
+					*((struct sockaddr_in6 *)sai->ai_addr);
+				break;
+#  endif /* LDAP_PF_INET6 */
+			case AF_INET:
+				*sap = ch_malloc(sizeof(struct sockaddr_in));
+				*(struct sockaddr_in *)*sap =
+					*((struct sockaddr_in *)sai->ai_addr);
+				break;
+			default:
+				*sap = NULL;
+				break;
+			}
+
+			if (*sap != NULL) {
+				(*sap)->sa_family = sai->ai_family;
+				sap++;
+				*sap = NULL;
+			}
+		}
+
+		freeaddrinfo(res);
+
+#else /* ! HAVE_GETADDRINFO */
+		int i, n = 1;
+		struct in_addr in;
+		struct hostent *he = NULL;
+
+		if ( host == NULL ) {
+			in.s_addr = htonl(INADDR_ANY);
+
+		} else if ( !inet_aton( host, &in ) ) {
+			he = gethostbyname( host );
+			if( he == NULL ) {
+				Debug( LDAP_DEBUG_ANY,
+					"daemon: invalid host %s", host );
+				return -1;
+			}
+			for (n = 0; he->h_addr_list[n]; n++) /* empty */;
+		}
+
+		sap = *sal = ch_malloc((n+1) * sizeof(void *));
+
+		for ( i = 0; i<n; i++ ) {
+			sap[i] = ch_calloc(1, sizeof(struct sockaddr_in));
+			sap[i]->sa_family = AF_INET;
+			((struct sockaddr_in *)sap[i])->sin_port = htons(port);
+			AC_MEMCPY( &((struct sockaddr_in *)sap[i])->sin_addr,
+				he ? (struct in_addr *)he->h_addr_list[i] : &in,
+				sizeof(struct in_addr) );
+		}
+		sap[i] = NULL;
+#endif /* ! HAVE_GETADDRINFO */
+	}
+
+	return 0;
+
+errexit:
+	slap_free_listener_addresses(*sal);
+	return -1;
+}
+
+static int
+slap_open_listener(
+	const char* url,
+	int *listeners,
+	int *cur )
+{
+	int	num, tmp, rc;
+	Listener l;
+	Listener *li;
+	LDAPURLDesc *lud;
+	unsigned short port;
+	int err, addrlen = 0;
+	struct sockaddr **sal = NULL, **psal;
+	int socktype = SOCK_STREAM;	/* default to COTS */
+	ber_socket_t s;
+	char ebuf[128];
+
+#if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
+	/*
+	 * use safe defaults
+	 */
+	int	crit = 1;
+#endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
+
+	rc = ldap_url_parse( url, &lud );
+
+	if( rc != LDAP_URL_SUCCESS ) {
+		Debug( LDAP_DEBUG_ANY,
+			"daemon: listen URL \"%s\" parse error=%d\n",
+			url, rc );
+		return rc;
+	}
+
+	l.sl_url.bv_val = NULL;
+	l.sl_mute = 0;
+	l.sl_busy = 0;
+
+#ifndef HAVE_TLS
+	if( ldap_pvt_url_scheme2tls( lud->lud_scheme ) ) {
+		Debug( LDAP_DEBUG_ANY, "daemon: TLS not supported (%s)\n",
+			url );
+		ldap_free_urldesc( lud );
+		return -1;
+	}
+
+	if(! lud->lud_port ) lud->lud_port = LDAP_PORT;
+
+#else /* HAVE_TLS */
+	l.sl_is_tls = ldap_pvt_url_scheme2tls( lud->lud_scheme );
+
+	if(! lud->lud_port ) {
+		lud->lud_port = l.sl_is_tls ? LDAPS_PORT : LDAP_PORT;
+	}
+#endif /* HAVE_TLS */
+
+	l.sl_is_proxied = ldap_pvt_url_scheme2proxied( lud->lud_scheme );
+
+#ifdef LDAP_TCP_BUFFER
+	l.sl_tcp_rmem = 0;
+	l.sl_tcp_wmem = 0;
+#endif /* LDAP_TCP_BUFFER */
+
+	port = (unsigned short) lud->lud_port;
+
+	tmp = ldap_pvt_url_scheme2proto(lud->lud_scheme);
+	if ( tmp == LDAP_PROTO_IPC ) {
+#ifdef LDAP_PF_LOCAL
+		if ( lud->lud_host == NULL || lud->lud_host[0] == '\0' ) {
+			err = slap_get_listener_addresses(LDAPI_SOCK, 0, &sal);
+		} else {
+			err = slap_get_listener_addresses(lud->lud_host, 0, &sal);
+		}
+#else /* ! LDAP_PF_LOCAL */
+
+		Debug( LDAP_DEBUG_ANY, "daemon: URL scheme not supported: %s",
+			url );
+		ldap_free_urldesc( lud );
+		return -1;
+#endif /* ! LDAP_PF_LOCAL */
+	} else {
+		if( lud->lud_host == NULL || lud->lud_host[0] == '\0'
+			|| strcmp(lud->lud_host, "*") == 0 )
+		{
+			err = slap_get_listener_addresses(NULL, port, &sal);
+		} else {
+			err = slap_get_listener_addresses(lud->lud_host, port, &sal);
+		}
+	}
+
+#ifdef LDAP_CONNECTIONLESS
+	l.sl_is_udp = ( tmp == LDAP_PROTO_UDP );
+#endif /* LDAP_CONNECTIONLESS */
+
+#if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
+	if ( lud->lud_exts ) {
+		err = get_url_perms( lud->lud_exts, &l.sl_perms, &crit );
+	} else {
+		l.sl_perms = S_IRWXU | S_IRWXO;
+	}
+#endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
+
+	if ( lud->lud_dn && lud->lud_dn[0] ) {
+		sprintf( (char *)url, "%s://%s/", lud->lud_scheme, lud->lud_host );
+		Debug( LDAP_DEBUG_ANY, "daemon: listener URL %s<junk> DN must be absent (%s)\n",
+			url, lud->lud_dn );
+		ldap_free_urldesc( lud );
+		return -1;
+	}
+
+	ldap_free_urldesc( lud );
+	if ( err ) {
+		slap_free_listener_addresses(sal);
+		return -1;
+	}
+
+	/* If we got more than one address returned, we need to make space
+	 * for it in the slap_listeners array.
+	 */
+	for ( num=0; sal[num]; num++ ) /* empty */;
+	if ( num > 1 ) {
+		*listeners += num-1;
+		slap_listeners = ch_realloc( slap_listeners,
+			(*listeners + 1) * sizeof(Listener *) );
+	}
+
+	psal = sal;
+	while ( *sal != NULL ) {
+		char *af;
+		switch( (*sal)->sa_family ) {
+		case AF_INET:
+			af = "IPv4";
+			break;
+#ifdef LDAP_PF_INET6
+		case AF_INET6:
+			af = "IPv6";
+			break;
+#endif /* LDAP_PF_INET6 */
+#ifdef LDAP_PF_LOCAL
+		case AF_LOCAL:
+			af = "Local";
+			break;
+#endif /* LDAP_PF_LOCAL */
+		default:
+			sal++;
+			continue;
+		}
+
+#ifdef LDAP_CONNECTIONLESS
+		if( l.sl_is_udp ) socktype = SOCK_DGRAM;
+#endif /* LDAP_CONNECTIONLESS */
+
+		s = socket( (*sal)->sa_family, socktype, 0);
+		if ( s == AC_SOCKET_INVALID ) {
+			int err = sock_errno();
+			Debug( LDAP_DEBUG_ANY,
+				"daemon: %s socket() failed errno=%d (%s)\n",
+				af, err, sock_errstr(err, ebuf, sizeof(ebuf)) );
+			sal++;
+			continue;
+		}
+		l.sl_sd = SLAP_SOCKNEW( s );
+
+		if ( l.sl_sd >= dtblsize ) {
+			Debug( LDAP_DEBUG_ANY,
+				"daemon: listener descriptor %ld is too great %ld\n",
+				(long) l.sl_sd, (long) dtblsize );
+			tcp_close( s );
+			sal++;
+			continue;
+		}
+
+#ifdef LDAP_PF_LOCAL
+		if ( (*sal)->sa_family == AF_LOCAL ) {
+			unlink( ((struct sockaddr_un *)*sal)->sun_path );
+		} else
+#endif /* LDAP_PF_LOCAL */
+		{
+#ifdef SO_REUSEADDR
+			/* enable address reuse */
+			tmp = 1;
+			rc = setsockopt( s, SOL_SOCKET, SO_REUSEADDR,
+				(char *) &tmp, sizeof(tmp) );
+			if ( rc == AC_SOCKET_ERROR ) {
+				int err = sock_errno();
+				Debug( LDAP_DEBUG_ANY, "slapd(%ld): "
+					"setsockopt(SO_REUSEADDR) failed errno=%d (%s)\n",
+					(long) l.sl_sd, err, sock_errstr(err, ebuf, sizeof(ebuf)) );
+			}
+#endif /* SO_REUSEADDR */
+		}
+
+		switch( (*sal)->sa_family ) {
+		case AF_INET:
+			addrlen = sizeof(struct sockaddr_in);
+			break;
+#ifdef LDAP_PF_INET6
+		case AF_INET6:
+#ifdef IPV6_V6ONLY
+			/* Try to use IPv6 sockets for IPv6 only */
+			tmp = 1;
+			rc = setsockopt( s , IPPROTO_IPV6, IPV6_V6ONLY,
+				(char *) &tmp, sizeof(tmp) );
+			if ( rc == AC_SOCKET_ERROR ) {
+				int err = sock_errno();
+				Debug( LDAP_DEBUG_ANY, "slapd(%ld): "
+					"setsockopt(IPV6_V6ONLY) failed errno=%d (%s)\n",
+					(long) l.sl_sd, err, sock_errstr(err, ebuf, sizeof(ebuf)) );
+			}
+#endif /* IPV6_V6ONLY */
+			addrlen = sizeof(struct sockaddr_in6);
+			break;
+#endif /* LDAP_PF_INET6 */
+
+#ifdef LDAP_PF_LOCAL
+		case AF_LOCAL:
+#ifdef LOCAL_CREDS
+			{
+				int one = 1;
+				setsockopt( s, 0, LOCAL_CREDS, &one, sizeof( one ) );
+			}
+#endif /* LOCAL_CREDS */
+
+			addrlen = sizeof( struct sockaddr_un );
+			break;
+#endif /* LDAP_PF_LOCAL */
+		}
+
+#ifdef LDAP_PF_LOCAL
+		/* create socket with all permissions set for those systems
+		 * that honor permissions on sockets (e.g. Linux); typically,
+		 * only write is required.  To exploit filesystem permissions,
+		 * place the socket in a directory and use directory's
+		 * permissions.  Need write perms to the directory to 
+		 * create/unlink the socket; likely need exec perms to access
+		 * the socket (ITS#4709) */
+		{
+			mode_t old_umask = 0;
+
+			if ( (*sal)->sa_family == AF_LOCAL ) {
+				old_umask = umask( 0 );
+			}
+#endif /* LDAP_PF_LOCAL */
+			rc = bind( s, *sal, addrlen );
+#ifdef LDAP_PF_LOCAL
+			if ( old_umask != 0 ) {
+				umask( old_umask );
+			}
+		}
+#endif /* LDAP_PF_LOCAL */
+		if ( rc ) {
+			err = sock_errno();
+			Debug( LDAP_DEBUG_ANY,
+				"daemon: bind(%ld) failed errno=%d (%s)\n",
+				(long)l.sl_sd, err, sock_errstr( err, ebuf, sizeof(ebuf) ) );
+			tcp_close( s );
+			sal++;
+			continue;
+		}
+
+		switch ( (*sal)->sa_family ) {
+#ifdef LDAP_PF_LOCAL
+		case AF_LOCAL: {
+			char *path = ((struct sockaddr_un *)*sal)->sun_path;
+			l.sl_name.bv_len = strlen(path) + STRLENOF("PATH=");
+			l.sl_name.bv_val = ch_malloc( l.sl_name.bv_len + 1 );
+			snprintf( l.sl_name.bv_val, l.sl_name.bv_len + 1, 
+				"PATH=%s", path );
+		} break;
+#endif /* LDAP_PF_LOCAL */
+
+		case AF_INET: {
+			char addr[INET_ADDRSTRLEN];
+			const char *s;
+#if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
+			s = inet_ntop( AF_INET, &((struct sockaddr_in *)*sal)->sin_addr,
+				addr, sizeof(addr) );
+#else /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
+			s = inet_ntoa( ((struct sockaddr_in *) *sal)->sin_addr );
+#endif /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
+			if (!s) s = SLAP_STRING_UNKNOWN;
+			port = ntohs( ((struct sockaddr_in *)*sal) ->sin_port );
+			l.sl_name.bv_val =
+				ch_malloc( sizeof("IP=255.255.255.255:65535") );
+			snprintf( l.sl_name.bv_val, sizeof("IP=255.255.255.255:65535"),
+				"IP=%s:%d", s, port );
+			l.sl_name.bv_len = strlen( l.sl_name.bv_val );
+		} break;
+
+#ifdef LDAP_PF_INET6
+		case AF_INET6: {
+			char addr[INET6_ADDRSTRLEN];
+			const char *s;
+			s = inet_ntop( AF_INET6, &((struct sockaddr_in6 *)*sal)->sin6_addr,
+				addr, sizeof addr);
+			if (!s) s = SLAP_STRING_UNKNOWN;
+			port = ntohs( ((struct sockaddr_in6 *)*sal)->sin6_port );
+			l.sl_name.bv_len = strlen(s) + sizeof("IP=[]:65535");
+			l.sl_name.bv_val = ch_malloc( l.sl_name.bv_len );
+			snprintf( l.sl_name.bv_val, l.sl_name.bv_len, "IP=[%s]:%d", 
+				s, port );
+			l.sl_name.bv_len = strlen( l.sl_name.bv_val );
+		} break;
+#endif /* LDAP_PF_INET6 */
+
+		default:
+			Debug( LDAP_DEBUG_ANY, "daemon: unsupported address family (%d)\n",
+				(int) (*sal)->sa_family );
+			break;
+		}
+
+		AC_MEMCPY(&l.sl_sa, *sal, addrlen);
+		ber_str2bv( url, 0, 1, &l.sl_url);
+		li = ch_malloc( sizeof( Listener ) );
+		*li = l;
+		slap_listeners[*cur] = li;
+		(*cur)++;
+		sal++;
+	}
+
+	slap_free_listener_addresses(psal);
+
+	if ( l.sl_url.bv_val == NULL ) {
+		Debug( LDAP_DEBUG_TRACE,
+			"slap_open_listener: failed on %s\n", url );
+		return -1;
+	}
+
+	Debug( LDAP_DEBUG_TRACE, "daemon: listener initialized %s\n",
+		l.sl_url.bv_val );
+	return 0;
+}
+
+static int sockinit(void);
+static int sockdestroy(void);
+
+static int daemon_inited = 0;
+
+int
+slapd_daemon_init( const char *urls )
+{
+	int i, j, n, rc;
+	char **u;
+
+	Debug( LDAP_DEBUG_ARGS, "daemon_init: %s\n",
+		urls ? urls : "<null>" );
+
+	wake_sds = ch_malloc( slapd_daemon_threads * sizeof( sdpair ));
+	for ( i=0; i<slapd_daemon_threads; i++ ) {
+		wake_sds[i][0] = AC_SOCKET_INVALID;
+		wake_sds[i][1] = AC_SOCKET_INVALID;
+	}
+
+	slap_daemon = ch_calloc( slapd_daemon_threads, sizeof( slap_daemon_st ));
+	ldap_pvt_thread_mutex_init( &slap_daemon[0].sd_mutex );
+#ifdef HAVE_TCPD
+	ldap_pvt_thread_mutex_init( &sd_tcpd_mutex );
+#endif /* TCP Wrappers */
+	ldap_pvt_thread_mutex_init( &emfile_mutex );
+
+	daemon_inited = 1;
+
+	if( (rc = sockinit()) != 0 ) return rc;
+
+#ifdef HAVE_SYSCONF
+	dtblsize = sysconf( _SC_OPEN_MAX );
+#elif defined(HAVE_GETDTABLESIZE)
+	dtblsize = getdtablesize();
+#else /* ! HAVE_SYSCONF && ! HAVE_GETDTABLESIZE */
+	dtblsize = FD_SETSIZE;
+#endif /* ! HAVE_SYSCONF && ! HAVE_GETDTABLESIZE */
+
+	SETUP_CLOSE();
+
+	/* open a pipe (or something equivalent connected to itself).
+	 * we write a byte on this fd whenever we catch a signal. The main
+	 * loop will be select'ing on this socket, and will wake up when
+	 * this byte arrives.
+	 */
+	if( (rc = lutil_pair( wake_sds[0] )) < 0 ) {
+		Debug( LDAP_DEBUG_ANY,
+			"daemon: lutil_pair() failed rc=%d\n", rc );
+		return rc;
+	}
+	ber_pvt_socket_set_nonblock( wake_sds[0][1], 1 );
+
+	SLAP_SOCK_INIT(0);
+
+	if( urls == NULL ) urls = "ldap:///";
+
+	u = ldap_str2charray( urls, " " );
+
+	if( u == NULL || u[0] == NULL ) {
+		Debug( LDAP_DEBUG_ANY, "daemon_init: no urls (%s) provided.\n",
+			urls );
+		if ( u )
+			ldap_charray_free( u );
+		return -1;
+	}
+
+	for( i=0; u[i] != NULL; i++ ) {
+		Debug( LDAP_DEBUG_TRACE, "daemon_init: listen on %s\n",
+			u[i] );
+	}
+
+	if( i == 0 ) {
+		Debug( LDAP_DEBUG_ANY, "daemon_init: no listeners to open (%s)\n",
+			urls );
+		ldap_charray_free( u );
+		return -1;
+	}
+
+	Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners to open...\n",
+		i );
+	slap_listeners = ch_malloc( (i+1)*sizeof(Listener *) );
+
+	for(n = 0, j = 0; u[n]; n++ ) {
+		if ( slap_open_listener( u[n], &i, &j ) ) {
+			ldap_charray_free( u );
+			return -1;
+		}
+	}
+	slap_listeners[j] = NULL;
+
+	Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners opened\n",
+		i );
+
+
+#ifdef HAVE_SLP
+	if( slapd_register_slp ) {
+		slapd_slp_init( urls );
+		slapd_slp_reg();
+	}
+#endif /* HAVE_SLP */
+
+	ldap_charray_free( u );
+
+	return !i;
+}
+
+/* transfer control of active sockets from old to new listener threads */
+static void
+slapd_socket_realloc( int newnum )
+{
+	int i, j, oldid, newid;
+	int newmask = newnum - 1;
+	Listener *sl;
+	int num_listeners;
+
+	for ( i=0; slap_listeners[i] != NULL; i++ ) ;
+	num_listeners = i;
+
+	for ( i=0; i<dtblsize; i++ ) {
+		int skip = 0;
+
+		/* don't bother with wake_sds, they're assigned independent of mask */
+		for (j=0; j<slapd_daemon_threads; j++) {
+			if ( i == wake_sds[j][0] || i == wake_sds[j][1] ) {
+				skip = 1;
+				break;
+			}
+		}
+		if ( skip ) continue;
+
+		oldid = DAEMON_ID(i);
+		newid = i & newmask;
+		if ( oldid == newid ) continue;
+		if ( !SLAP_SOCK_IS_ACTIVE( oldid, i )) continue;
+		sl = NULL;
+		if ( num_listeners ) {
+			for ( j=0; slap_listeners[j] != NULL; j++ ) {
+				if ( slap_listeners[j]->sl_sd == i ) {
+					sl = slap_listeners[j];
+					num_listeners--;
+					break;
+				}
+			}
+		}
+		SLAP_SOCK_ADD( newid, i, sl );
+		if ( SLAP_SOCK_IS_READ( oldid, i )) {
+			SLAP_SOCK_SET_READ( newid, i );
+		}
+		if ( SLAP_SOCK_IS_WRITE( oldid, i )) {
+			SLAP_SOCK_SET_WRITE( newid, i );
+			slap_daemon[oldid].sd_nwriters--;
+			slap_daemon[newid].sd_nwriters++;
+		}
+		if ( connection_is_active( i )) {
+			slap_daemon[oldid].sd_nactives--;
+			slap_daemon[newid].sd_nactives++;
+		}
+		SLAP_SOCK_DEL( oldid, i );
+	}
+}
+
+
+int
+slapd_daemon_destroy( void )
+{
+	connections_destroy();
+	if ( daemon_inited ) {
+		int i;
+
+		for ( i=0; i<slapd_daemon_threads; i++ ) {
+#ifdef HAVE_WINSOCK
+			if ( wake_sds[i][1] != INVALID_SOCKET &&
+				SLAP_FD2SOCK( wake_sds[i][1] ) != SLAP_FD2SOCK( wake_sds[i][0] ))
+#endif /* HAVE_WINSOCK */
+				tcp_close( SLAP_FD2SOCK(wake_sds[i][1]) );
+#ifdef HAVE_WINSOCK
+			if ( wake_sds[i][0] != INVALID_SOCKET )
+#endif /* HAVE_WINSOCK */
+				tcp_close( SLAP_FD2SOCK(wake_sds[i][0]) );
+			ldap_pvt_thread_mutex_destroy( &slap_daemon[i].sd_mutex );
+			SLAP_SOCK_DESTROY(i);
+		}
+		daemon_inited = 0;
+		ldap_pvt_thread_mutex_destroy( &emfile_mutex );
+#ifdef HAVE_TCPD
+		ldap_pvt_thread_mutex_destroy( &sd_tcpd_mutex );
+#endif /* TCP Wrappers */
+	}
+	sockdestroy();
+
+#ifdef HAVE_SLP
+	if( slapd_register_slp ) {
+		slapd_slp_dereg();
+		slapd_slp_deinit();
+	}
+#endif /* HAVE_SLP */
+
+	return 0;
+}
+
+
+static void
+close_listeners(
+	int remove )
+{
+	int l;
+
+	if ( !listening )
+		return;
+	listening = 0;
+
+	for ( l = 0; slap_listeners[l] != NULL; l++ ) {
+		Listener *lr = slap_listeners[l];
+
+		if ( lr->sl_sd != AC_SOCKET_INVALID ) {
+			int s = lr->sl_sd;
+			lr->sl_sd = AC_SOCKET_INVALID;
+			if ( remove ) slapd_remove( s, NULL, 0, 0, 0 );
+
+#ifdef LDAP_PF_LOCAL
+			if ( lr->sl_sa.sa_addr.sa_family == AF_LOCAL ) {
+				unlink( lr->sl_sa.sa_un_addr.sun_path );
+			}
+#endif /* LDAP_PF_LOCAL */
+
+			slapd_close( s );
+		}
+	}
+}
+
+static void
+destroy_listeners( void )
+{
+	Listener *lr, **ll = slap_listeners;
+
+	if ( ll == NULL )
+		return;
+
+	while ( (lr = *ll++) != NULL ) {
+		if ( lr->sl_url.bv_val ) {
+			ber_memfree( lr->sl_url.bv_val );
+		}
+
+		if ( lr->sl_name.bv_val ) {
+			ber_memfree( lr->sl_name.bv_val );
+		}
+
+		free( lr );
+	}
+
+	free( slap_listeners );
+	slap_listeners = NULL;
+}
+
+static int
+slap_listener(
+	Listener *sl )
+{
+	Sockaddr		from;
+
+	ber_socket_t s, sfd;
+	ber_socklen_t len = sizeof(from);
+	Connection *c;
+	slap_ssf_t ssf = 0;
+	struct berval authid = BER_BVNULL;
+#ifdef SLAPD_RLOOKUPS
+	char hbuf[NI_MAXHOST];
+#endif /* SLAPD_RLOOKUPS */
+
+	char	*dnsname = NULL;
+	/* we assume INET6_ADDRSTRLEN > INET_ADDRSTRLEN */
+	char peername[LDAP_IPADDRLEN];
+	struct berval peerbv = BER_BVC(peername);
+#ifdef LDAP_PF_LOCAL_SENDMSG
+	char peerbuf[8];
+#endif
+	int cflag;
+	int tid;
+	char ebuf[128];
+
+	Debug( LDAP_DEBUG_TRACE,
+		">>> slap_listener(%s)\n",
+		sl->sl_url.bv_val );
+
+	peername[0] = '\0';
+
+#ifdef LDAP_CONNECTIONLESS
+	if ( sl->sl_is_udp ) return 1;
+#endif /* LDAP_CONNECTIONLESS */
+
+#  ifdef LDAP_PF_LOCAL
+	/* FIXME: apparently accept doesn't fill
+	 * the sun_path sun_path member */
+	from.sa_un_addr.sun_path[0] = '\0';
+#  endif /* LDAP_PF_LOCAL */
+
+	s = accept( SLAP_FD2SOCK( sl->sl_sd ), (struct sockaddr *) &from, &len );
+	if ( s != AC_SOCKET_INVALID ) {
+		SET_CLOSE(s);
+	}
+	Debug( LDAP_DEBUG_CONNS,
+		"daemon: accept() = %d\n", s );
+
+	/* Resume the listener FD to allow concurrent-processing of
+	 * additional incoming connections.
+	 */
+	sl->sl_busy = 0;
+	WAKE_LISTENER(DAEMON_ID(sl->sl_sd),1);
+
+	if ( s == AC_SOCKET_INVALID ) {
+		int err = sock_errno();
+
+		if(
+#ifdef EMFILE
+		    err == EMFILE ||
+#endif /* EMFILE */
+#ifdef ENFILE
+		    err == ENFILE ||
+#endif /* ENFILE */
+		    0 )
+		{
+			ldap_pvt_thread_mutex_lock( &emfile_mutex );
+			emfile++;
+			/* Stop listening until an existing session closes */
+			sl->sl_mute = 1;
+			ldap_pvt_thread_mutex_unlock( &emfile_mutex );
+		}
+
+		Debug( LDAP_DEBUG_ANY,
+			"daemon: accept(%ld) failed errno=%d (%s)\n",
+			(long) sl->sl_sd, err, sock_errstr(err, ebuf, sizeof(ebuf)) );
+		ldap_pvt_thread_yield();
+		return 0;
+	}
+	sfd = SLAP_SOCKNEW( s );
+
+	/* make sure descriptor number isn't too great */
+	if ( sfd >= dtblsize ) {
+		Debug( LDAP_DEBUG_ANY,
+			"daemon: %ld beyond descriptor table size %ld\n",
+			(long) sfd, (long) dtblsize );
+
+		tcp_close(s);
+		ldap_pvt_thread_yield();
+		return 0;
+	}
+	tid = DAEMON_ID(sfd);
+
+#ifdef LDAP_DEBUG
+	ldap_pvt_thread_mutex_lock( &slap_daemon[tid].sd_mutex );
+	/* newly accepted stream should not be in any of the FD SETS */
+	assert( SLAP_SOCK_NOT_ACTIVE( tid, sfd ));
+	ldap_pvt_thread_mutex_unlock( &slap_daemon[tid].sd_mutex );
+#endif /* LDAP_DEBUG */
+
+#if defined( SO_KEEPALIVE ) || defined( TCP_NODELAY )
+#ifdef LDAP_PF_LOCAL
+	/* for IPv4 and IPv6 sockets only */
+	if ( from.sa_addr.sa_family != AF_LOCAL )
+#endif /* LDAP_PF_LOCAL */
+	{
+		int rc;
+		int tmp;
+#ifdef SO_KEEPALIVE
+		/* enable keep alives */
+		tmp = 1;
+		rc = setsockopt( s, SOL_SOCKET, SO_KEEPALIVE,
+			(char *) &tmp, sizeof(tmp) );
+		if ( rc == AC_SOCKET_ERROR ) {
+			int err = sock_errno();
+			Debug( LDAP_DEBUG_ANY,
+				"slapd(%ld): setsockopt(SO_KEEPALIVE) failed "
+				"errno=%d (%s)\n", (long) sfd, err, sock_errstr(err, ebuf, sizeof(ebuf)) );
+			slapd_close(sfd);
+			return 0;
+		}
+#endif /* SO_KEEPALIVE */
+#ifdef TCP_NODELAY
+		/* enable no delay */
+		tmp = 1;
+		rc = setsockopt( s, IPPROTO_TCP, TCP_NODELAY,
+			(char *)&tmp, sizeof(tmp) );
+		if ( rc == AC_SOCKET_ERROR ) {
+			int err = sock_errno();
+			Debug( LDAP_DEBUG_ANY,
+				"slapd(%ld): setsockopt(TCP_NODELAY) failed "
+				"errno=%d (%s)\n", (long) sfd, err, sock_errstr(err, ebuf, sizeof(ebuf)) );
+			slapd_close(sfd);
+			return 0;
+		}
+#endif /* TCP_NODELAY */
+	}
+#endif /* SO_KEEPALIVE || TCP_NODELAY */
+
+	Debug( LDAP_DEBUG_CONNS,
+		"daemon: listen=%ld, new connection on %ld\n",
+		(long) sl->sl_sd, (long) sfd );
+
+	cflag = 0;
+	switch ( from.sa_addr.sa_family ) {
+#  ifdef LDAP_PF_LOCAL
+	case AF_LOCAL:
+		cflag |= CONN_IS_IPC;
+
+		/* FIXME: apparently accept doesn't fill
+		 * the sun_path sun_path member */
+		if ( from.sa_un_addr.sun_path[0] == '\0' ) {
+			AC_MEMCPY( from.sa_un_addr.sun_path,
+					sl->sl_sa.sa_un_addr.sun_path,
+					sizeof( from.sa_un_addr.sun_path ) );
+		}
+
+		sprintf( peername, "PATH=%s", from.sa_un_addr.sun_path );
+		ssf = local_ssf;
+		{
+			uid_t uid;
+			gid_t gid;
+
+#ifdef LDAP_PF_LOCAL_SENDMSG
+			peerbv.bv_val = peerbuf;
+			peerbv.bv_len = sizeof( peerbuf );
+#endif
+			if( LUTIL_GETPEEREID( s, &uid, &gid, &peerbv ) == 0 ) {
+				authid.bv_val = ch_malloc(
+					STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
+					"cn=peercred,cn=external,cn=auth" ) + 1 );
+				authid.bv_len = sprintf( authid.bv_val,
+					"gidNumber=%d+uidNumber=%d,"
+					"cn=peercred,cn=external,cn=auth",
+					(int) gid, (int) uid );
+				assert( authid.bv_len <=
+					STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
+					"cn=peercred,cn=external,cn=auth" ) );
+			}
+		}
+		dnsname = "local";
+		break;
+#endif /* LDAP_PF_LOCAL */
+
+#  ifdef LDAP_PF_INET6
+	case AF_INET6:
+#  endif /* LDAP_PF_INET6 */
+	case AF_INET:
+		if ( sl->sl_is_proxied ) {
+			if ( !proxyp( sfd, &from ) ) {
+				Debug( LDAP_DEBUG_ANY, "slapd(%ld): proxyp failed\n", (long)sfd );
+				slapd_close( sfd );
+				return 0;
+			}
+		}
+		ldap_pvt_sockaddrstr( &from, &peerbv );
+		break;
+
+	default:
+		slapd_close(sfd);
+		return 0;
+	}
+
+	if ( ( from.sa_addr.sa_family == AF_INET )
+#ifdef LDAP_PF_INET6
+		|| ( from.sa_addr.sa_family == AF_INET6 )
+#endif /* LDAP_PF_INET6 */
+		)
+	{
+		dnsname = NULL;
+#ifdef SLAPD_RLOOKUPS
+		if ( use_reverse_lookup ) {
+			char *herr;
+			if (ldap_pvt_get_hname( (const struct sockaddr *)&from, len, hbuf,
+				sizeof(hbuf), &herr ) == 0) {
+				ldap_pvt_str2lower( hbuf );
+				dnsname = hbuf;
+			}
+		}
+#endif /* SLAPD_RLOOKUPS */
+
+#ifdef HAVE_TCPD
+		{
+			int rc;
+			char *peeraddr, *paend;
+			peeraddr = peerbv.bv_val + 3;
+			if ( *peeraddr == '[' ) {
+				peeraddr++;
+				paend = strrchr( peeraddr, ']' );
+			} else {
+				paend = strrchr( peeraddr, ':' );
+			}
+			if ( paend )
+				*paend = '\0';
+			ldap_pvt_thread_mutex_lock( &sd_tcpd_mutex );
+			rc = hosts_ctl("slapd",
+				dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
+				peeraddr,
+				SLAP_STRING_UNKNOWN );
+			ldap_pvt_thread_mutex_unlock( &sd_tcpd_mutex );
+			if ( !rc ) {
+				/* DENY ACCESS */
+				Debug( LDAP_DEBUG_STATS,
+					"fd=%ld DENIED from %s (%s)\n",
+					(long) sfd,
+					dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
+					peeraddr );
+				slapd_close(sfd);
+				return 0;
+			}
+			if ( paend ) {
+				if ( peeraddr[-1] == '[' )
+					*paend = ']';
+				else
+					*paend = ':';
+			}
+		}
+#endif /* HAVE_TCPD */
+	}
+
+#ifdef HAVE_TLS
+	if ( sl->sl_is_tls ) cflag |= CONN_IS_TLS;
+#endif
+	c = connection_init(sfd, sl,
+		dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
+		peername, cflag, ssf,
+		authid.bv_val ? &authid : NULL
+		LDAP_PF_LOCAL_SENDMSG_ARG(&peerbv));
+
+	if( authid.bv_val ) ch_free(authid.bv_val);
+
+	if( !c ) {
+		Debug( LDAP_DEBUG_ANY,
+			"daemon: connection_init(%ld, %s, %s) failed.\n",
+			(long) sfd, peername, sl->sl_name.bv_val );
+		slapd_close(sfd);
+	}
+
+	return 0;
+}
+
+static void*
+slap_listener_thread(
+	void* ctx,
+	void* ptr )
+{
+	int		rc;
+	Listener	*sl = (Listener *)ptr;
+
+	rc = slap_listener( sl );
+
+	if( rc != LDAP_SUCCESS ) {
+		Debug( LDAP_DEBUG_ANY,
+			"slap_listener_thread(%s): failed err=%d",
+			sl->sl_url.bv_val, rc );
+	}
+
+	return (void*)NULL;
+}
+
+static int
+slap_listener_activate(
+	Listener* sl )
+{
+	int rc;
+
+	Debug( LDAP_DEBUG_TRACE, "slap_listener_activate(%d): %s\n",
+		sl->sl_sd, sl->sl_busy ? "busy" : "" );
+
+	sl->sl_busy = 1;
+
+	rc = ldap_pvt_thread_pool_submit( &connection_pool,
+		slap_listener_thread, (void *) sl );
+
+	if( rc != 0 ) {
+		Debug( LDAP_DEBUG_ANY,
+			"slap_listener_activate(%d): submit failed (%d)\n",
+			sl->sl_sd, rc );
+	}
+	return rc;
+}
+
+static void *
+slapd_rtask_trampoline(
+	void	*ctx,
+	void	*arg )
+{
+	struct re_s *rtask = arg;
+
+	/* invalidate pool_cookie */
+	rtask->pool_cookie = NULL;
+	return rtask->routine( ctx, arg );
+}
+
+static void *
+slapd_daemon_task(
+	void *ptr )
+{
+	int l;
+	time_t last_idle_check = 0;
+	int ebadf = 0;
+	int tid = (slap_daemon_st *) ptr - slap_daemon;
+	char ebuf[128];
+
+#define SLAPD_IDLE_CHECK_LIMIT 4
+
+	slapd_add( wake_sds[tid][0], 0, NULL, tid );
+	if ( tid )
+		goto loop;
+
+	/* Init stuff done only by thread 0 */
+
+	last_idle_check = slap_get_time();
+
+	for ( l = 0; slap_listeners[l] != NULL; l++ ) {
+		if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) continue;
+
+#ifdef LDAP_CONNECTIONLESS
+		/* Since this is connectionless, the data port is the
+		 * listening port. The listen() and accept() calls
+		 * are unnecessary.
+		 */
+		if ( slap_listeners[l]->sl_is_udp )
+			continue;
+#endif /* LDAP_CONNECTIONLESS */
+
+		/* FIXME: TCP-only! */
+#ifdef LDAP_TCP_BUFFER
+		if ( 1 ) {
+			int origsize, size, realsize, rc;
+			socklen_t optlen;
+
+			size = 0;
+			if ( slap_listeners[l]->sl_tcp_rmem > 0 ) {
+				size = slap_listeners[l]->sl_tcp_rmem;
+			} else if ( slapd_tcp_rmem > 0 ) {
+				size = slapd_tcp_rmem;
+			}
+
+			if ( size > 0 ) {
+				optlen = sizeof( origsize );
+				rc = getsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
+					SOL_SOCKET,
+					SO_RCVBUF,
+					(void *)&origsize,
+					&optlen );
+
+				if ( rc ) {
+					int err = sock_errno();
+					Debug( LDAP_DEBUG_ANY,
+						"slapd_daemon_task: getsockopt(SO_RCVBUF) failed errno=%d (%s)\n",
+						err, sock_errstr(err, ebuf, sizeof(ebuf)) );
+				}
+
+				optlen = sizeof( size );
+				rc = setsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
+					SOL_SOCKET,
+					SO_RCVBUF,
+					(const void *)&size,
+					optlen );
+
+				if ( rc ) {
+					int err = sock_errno();
+					Debug( LDAP_DEBUG_ANY,
+						"slapd_daemon_task: setsockopt(SO_RCVBUF) failed errno=%d (%s)\n",
+						err, sock_errstr(err, ebuf, sizeof(ebuf)) );
+				}
+
+				optlen = sizeof( realsize );
+				rc = getsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
+					SOL_SOCKET,
+					SO_RCVBUF,
+					(void *)&realsize,
+					&optlen );
+
+				if ( rc ) {
+					int err = sock_errno();
+					Debug( LDAP_DEBUG_ANY,
+						"slapd_daemon_task: getsockopt(SO_RCVBUF) failed errno=%d (%s)\n",
+						err, sock_errstr(err, ebuf, sizeof(ebuf)) );
+				}
+
+				Debug(LDAP_DEBUG_ANY,
+				      "slapd_daemon_task: url=%s (#%d) RCVBUF original size=%d requested size=%d real size=%d\n",
+				      slap_listeners[l]->sl_url.bv_val, l,
+				      origsize, size, realsize );
+			}
+
+			size = 0;
+			if ( slap_listeners[l]->sl_tcp_wmem > 0 ) {
+				size = slap_listeners[l]->sl_tcp_wmem;
+			} else if ( slapd_tcp_wmem > 0 ) {
+				size = slapd_tcp_wmem;
+			}
+
+			if ( size > 0 ) {
+				optlen = sizeof( origsize );
+				rc = getsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
+					SOL_SOCKET,
+					SO_SNDBUF,
+					(void *)&origsize,
+					&optlen );
+
+				if ( rc ) {
+					int err = sock_errno();
+					Debug( LDAP_DEBUG_ANY,
+						"slapd_daemon_task: getsockopt(SO_SNDBUF) failed errno=%d (%s)\n",
+						err, sock_errstr(err, ebuf, sizeof(ebuf)) );
+				}
+
+				optlen = sizeof( size );
+				rc = setsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
+					SOL_SOCKET,
+					SO_SNDBUF,
+					(const void *)&size,
+					optlen );
+
+				if ( rc ) {
+					int err = sock_errno();
+					Debug( LDAP_DEBUG_ANY,
+						"slapd_daemon_task: setsockopt(SO_SNDBUF) failed errno=%d (%s)",
+						err, sock_errstr(err, ebuf, sizeof(ebuf)) );
+				}
+
+				optlen = sizeof( realsize );
+				rc = getsockopt( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ),
+					SOL_SOCKET,
+					SO_SNDBUF,
+					(void *)&realsize,
+					&optlen );
+
+				if ( rc ) {
+					int err = sock_errno();
+					Debug( LDAP_DEBUG_ANY,
+						"slapd_daemon_task: getsockopt(SO_SNDBUF) failed errno=%d (%s)\n",
+						err, sock_errstr(err, ebuf, sizeof(ebuf)) );
+				}
+
+				Debug(LDAP_DEBUG_ANY,
+				      "slapd_daemon_task: url=%s (#%d) SNDBUF original size=%d requested size=%d real size=%d\n",
+				      slap_listeners[l]->sl_url.bv_val, l,
+				      origsize, size, realsize );
+			}
+		}
+#endif /* LDAP_TCP_BUFFER */
+
+		if ( listen( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ), SLAPD_LISTEN_BACKLOG ) == -1 ) {
+			int err = sock_errno();
+
+#ifdef LDAP_PF_INET6
+			/* If error is EADDRINUSE, we are trying to listen to INADDR_ANY and
+			 * we are already listening to in6addr_any, then we want to ignore
+			 * this and continue.
+			 */
+			if ( err == EADDRINUSE ) {
+				int i;
+				struct sockaddr_in sa = slap_listeners[l]->sl_sa.sa_in_addr;
+				struct sockaddr_in6 sa6;
+				
+				if ( sa.sin_family == AF_INET &&
+				     sa.sin_addr.s_addr == htonl(INADDR_ANY) ) {
+					for ( i = 0 ; i < l; i++ ) {
+						sa6 = slap_listeners[i]->sl_sa.sa_in6_addr;
+						if ( sa6.sin6_family == AF_INET6 &&
+						     !memcmp( &sa6.sin6_addr, &in6addr_any,
+								sizeof(struct in6_addr) ) )
+						{
+							break;
+						}
+					}
+
+					if ( i < l ) {
+						/* We are already listening to in6addr_any */
+						Debug( LDAP_DEBUG_CONNS,
+							"daemon: Attempt to listen to 0.0.0.0 failed, "
+							"already listening on ::, assuming IPv4 included\n" );
+						slapd_close( slap_listeners[l]->sl_sd );
+						slap_listeners[l]->sl_sd = AC_SOCKET_INVALID;
+						continue;
+					}
+				}
+			}
+#endif /* LDAP_PF_INET6 */
+			Debug( LDAP_DEBUG_ANY,
+				"daemon: listen(%s, 5) failed errno=%d (%s)\n",
+					slap_listeners[l]->sl_url.bv_val, err,
+					sock_errstr(err, ebuf, sizeof(ebuf)) );
+			ldap_pvt_thread_mutex_lock( &slapd_init_mutex );
+			slapd_shutdown = 2;
+			ldap_pvt_thread_cond_signal( &slapd_init_cond );
+			ldap_pvt_thread_mutex_unlock( &slapd_init_mutex );
+			return (void*)-1;
+		}
+
+		/* make the listening socket non-blocking */
+		if ( ber_pvt_socket_set_nonblock( SLAP_FD2SOCK( slap_listeners[l]->sl_sd ), 1 ) < 0 ) {
+			Debug( LDAP_DEBUG_ANY, "slapd_daemon_task: "
+				"set nonblocking on a listening socket failed\n" );
+			ldap_pvt_thread_mutex_lock( &slapd_init_mutex );
+			slapd_shutdown = 2;
+			ldap_pvt_thread_cond_signal( &slapd_init_cond );
+			ldap_pvt_thread_mutex_unlock( &slapd_init_mutex );
+			return (void*)-1;
+		}
+
+		slapd_add( slap_listeners[l]->sl_sd, 0, slap_listeners[l], -1 );
+	}
+
+	ldap_pvt_thread_mutex_lock( &slapd_init_mutex );
+	slapd_ready = 1;
+	ldap_pvt_thread_cond_signal( &slapd_init_cond );
+	ldap_pvt_thread_mutex_unlock( &slapd_init_mutex );
+
+#ifdef HAVE_NT_SERVICE_MANAGER
+	if ( started_event != NULL ) {
+		ldap_pvt_thread_cond_signal( &started_event );
+	}
+#endif /* HAVE_NT_SERVICE_MANAGER */
+
+loop:
+
+	/* initialization complete. Here comes the loop. */
+
+	while ( !slapd_shutdown ) {
+		ber_socket_t		i;
+		int			ns, nwriters;
+		int			at;
+		ber_socket_t		nfds;
+#if SLAP_EVENTS_ARE_INDEXED
+		ber_socket_t		nrfds, nwfds;
+#endif /* SLAP_EVENTS_ARE_INDEXED */
+#define SLAPD_EBADF_LIMIT 16
+
+		time_t			now;
+
+		SLAP_EVENT_DECL;
+
+		struct timeval		tv;
+		struct timeval		*tvp;
+
+		struct timeval		cat;
+		time_t			tdelta = 1;
+		struct re_s*		rtask;
+
+		now = slap_get_time();
+
+		if ( !tid && ( global_idletimeout > 0 )) {
+			int check = 0;
+			/* Set the select timeout.
+			 * Don't just truncate, preserve the fractions of
+			 * seconds to prevent sleeping for zero time.
+			 */
+			{
+				tv.tv_sec = global_idletimeout / SLAPD_IDLE_CHECK_LIMIT;
+				tv.tv_usec = global_idletimeout - \
+					( tv.tv_sec * SLAPD_IDLE_CHECK_LIMIT );
+				tv.tv_usec *= 1000000 / SLAPD_IDLE_CHECK_LIMIT;
+				if ( difftime( last_idle_check +
+					global_idletimeout/SLAPD_IDLE_CHECK_LIMIT, now ) < 0 )
+					check = 1;
+			}
+			if ( check ) {
+				connections_timeout_idle( now );
+				last_idle_check = now;
+			}
+		} else {
+			tv.tv_sec = 0;
+			tv.tv_usec = 0;
+		}
+
+#ifdef SIGHUP
+		if ( slapd_gentle_shutdown ) {
+			ber_socket_t active;
+
+			if ( !tid && slapd_gentle_shutdown == 1 ) {
+				BackendDB *be;
+				Debug( LDAP_DEBUG_ANY, "slapd gentle shutdown\n" );
+				close_listeners( 1 );
+				frontendDB->be_restrictops |= SLAP_RESTRICT_OP_WRITES;
+				LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
+					be->be_restrictops |= SLAP_RESTRICT_OP_WRITES;
+				}
+				slapd_gentle_shutdown = 2;
+			}
+
+			ldap_pvt_thread_mutex_lock( &slap_daemon[tid].sd_mutex );
+			active = slap_daemon[tid].sd_nactives;
+			ldap_pvt_thread_mutex_unlock( &slap_daemon[tid].sd_mutex );
+
+			if ( active == 0 ) {
+				if ( !tid ) {
+					for ( l=1; l<slapd_daemon_threads; l++ ) {
+						ldap_pvt_thread_mutex_lock( &slap_daemon[l].sd_mutex );
+						active += slap_daemon[l].sd_nactives;
+						ldap_pvt_thread_mutex_unlock( &slap_daemon[l].sd_mutex );
+					}
+					if ( !active )
+						slapd_shutdown = 1;
+				}
+				if ( !active )
+					break;
+			}
+		}
+#endif /* SIGHUP */
+		at = 0;
+
+		ldap_pvt_thread_mutex_lock( &slap_daemon[tid].sd_mutex );
+
+		nwriters = slap_daemon[tid].sd_nwriters;
+
+		if ( listening )
+		for ( l = 0; slap_listeners[l] != NULL; l++ ) {
+			Listener *lr = slap_listeners[l];
+
+			if ( lr->sl_sd == AC_SOCKET_INVALID ) continue;
+			if ( DAEMON_ID( lr->sl_sd ) != tid ) continue;
+			if ( !SLAP_SOCK_IS_ACTIVE( tid, lr->sl_sd )) continue;
+
+			if ( lr->sl_mute || lr->sl_busy )
+			{
+				SLAP_SOCK_CLR_READ( tid, lr->sl_sd );
+			} else {
+				SLAP_SOCK_SET_READ( tid, lr->sl_sd );
+			}
+		}
+
+		SLAP_EVENT_INIT(tid);
+
+		nfds = SLAP_EVENT_MAX(tid);
+
+		if (( global_idletimeout ) && slap_daemon[tid].sd_nactives ) at = 1;
+
+		ldap_pvt_thread_mutex_unlock( &slap_daemon[tid].sd_mutex );
+
+		if ( at 
+#if defined(HAVE_YIELDING_SELECT)
+			&&  ( tv.tv_sec || tv.tv_usec )
+#endif /* HAVE_YIELDING_SELECT */
+			)
+		{
+			tvp = &tv;
+		} else {
+			tvp = NULL;
+		}
+
+		/* Only thread 0 handles runqueue */
+		if ( !tid ) {
+			ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
+			rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
+			while ( rtask && cat.tv_sec && cat.tv_sec <= now ) {
+				if ( ldap_pvt_runqueue_isrunning( &slapd_rq, rtask )) {
+					ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
+				} else {
+					ldap_pvt_runqueue_runtask( &slapd_rq, rtask );
+					ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
+					ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
+					ldap_pvt_thread_pool_submit2( &connection_pool,
+						slapd_rtask_trampoline, (void *) rtask, &rtask->pool_cookie );
+					ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
+				}
+				rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
+			}
+			ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
+
+			if ( rtask && cat.tv_sec ) {
+				/* NOTE: diff __should__ always be >= 0,
+				 * AFAI understand; however (ITS#4872),
+				 * time_t might be unsigned in some systems,
+				 * while difftime() returns a double */
+				double diff = difftime( cat.tv_sec, now );
+				if ( diff <= 0 ) {
+					diff = tdelta;
+				}
+				if ( tvp == NULL || diff < tv.tv_sec ) {
+					tv.tv_sec = diff;
+					tv.tv_usec = 0;
+					tvp = &tv;
+				}
+			}
+		}
+
+		for ( l = 0; slap_listeners[l] != NULL; l++ ) {
+			Listener *lr = slap_listeners[l];
+
+			if ( lr->sl_sd == AC_SOCKET_INVALID ) {
+				continue;
+			}
+
+			if ( DAEMON_ID( lr->sl_sd ) != tid ) continue;
+
+			if ( lr->sl_mute ) {
+				Debug( LDAP_DEBUG_CONNS,
+					"daemon: " SLAP_EVENT_FNAME ": "
+					"listen=%d muted\n",
+					lr->sl_sd );
+				continue;
+			}
+
+			if ( lr->sl_busy ) {
+				Debug( LDAP_DEBUG_CONNS,
+					"daemon: " SLAP_EVENT_FNAME ": "
+					"listen=%d busy\n",
+					lr->sl_sd );
+				continue;
+			}
+
+			Debug( LDAP_DEBUG_CONNS,
+				"daemon: " SLAP_EVENT_FNAME ": "
+				"listen=%d active_threads=%d tvp=%s\n",
+				lr->sl_sd, at, tvp == NULL ? "NULL" : "zero" );
+		}
+
+		SLAP_EVENT_WAIT( tid, tvp, &ns );
+		switch ( ns ) {
+		case -1: {	/* failure - try again */
+				int err = sock_errno();
+
+				if ( err != EINTR ) {
+					ebadf++;
+
+					/* Don't log unless we got it twice in a row */
+					if ( !( ebadf & 1 ) ) {
+						Debug( LDAP_DEBUG_ANY,
+							"daemon: "
+							SLAP_EVENT_FNAME
+							" failed count %d "
+							"err (%d): %s\n",
+							ebadf, err,
+							sock_errstr( err, ebuf, sizeof(ebuf) ) );
+					}
+					if ( ebadf >= SLAPD_EBADF_LIMIT ) {
+						slapd_shutdown = 2;
+					}
+				}
+			}
+			continue;
+
+		case 0:		/* timeout - let threads run */
+			ebadf = 0;
+#ifndef HAVE_YIELDING_SELECT
+			Debug( LDAP_DEBUG_CONNS, "daemon: " SLAP_EVENT_FNAME
+				"timeout - yielding\n" );
+
+			ldap_pvt_thread_yield();
+#endif /* ! HAVE_YIELDING_SELECT */
+			continue;
+
+		default:	/* something happened - deal with it */
+			if ( slapd_shutdown ) continue;
+
+			ebadf = 0;
+			Debug( LDAP_DEBUG_CONNS,
+				"daemon: activity on %d descriptor%s\n",
+				ns, ns != 1 ? "s" : "" );
+			/* FALL THRU */
+		}
+
+#if SLAP_EVENTS_ARE_INDEXED
+		if ( SLAP_EVENT_IS_READ( wake_sds[tid][0] ) ) {
+			char c[BUFSIZ];
+			SLAP_EVENT_CLR_READ( wake_sds[tid][0] );
+			waking = 0;
+			tcp_read( SLAP_FD2SOCK(wake_sds[tid][0]), c, sizeof(c) );
+			Debug( LDAP_DEBUG_CONNS, "daemon: waked\n" );
+			continue;
+		}
+
+		/* The event slot equals the descriptor number - this is
+		 * true for Unix select and poll. We treat Windows select
+		 * like this too, even though it's a kludge.
+		 */
+		if ( listening )
+		for ( l = 0; slap_listeners[l] != NULL; l++ ) {
+			int rc;
+
+			if ( ns <= 0 ) break;
+			if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) continue;
+			if ( DAEMON_ID( slap_listeners[l]->sl_sd ) != tid ) continue;
+#ifdef LDAP_CONNECTIONLESS
+			if ( slap_listeners[l]->sl_is_udp ) continue;
+#endif /* LDAP_CONNECTIONLESS */
+			if ( !SLAP_EVENT_IS_READ( slap_listeners[l]->sl_sd ) ) continue;
+			
+			/* clear events */
+			SLAP_EVENT_CLR_READ( slap_listeners[l]->sl_sd );
+			SLAP_EVENT_CLR_WRITE( slap_listeners[l]->sl_sd );
+			ns--;
+
+			rc = slap_listener_activate( slap_listeners[l] );
+		}
+
+		/* bypass the following tests if no descriptors left */
+		if ( ns <= 0 ) {
+#ifndef HAVE_YIELDING_SELECT
+			ldap_pvt_thread_yield();
+#endif /* HAVE_YIELDING_SELECT */
+			continue;
+		}
+
+		Debug( LDAP_DEBUG_CONNS, "daemon: activity on:" );
+		nrfds = 0;
+		nwfds = 0;
+		for ( i = 0; i < nfds; i++ ) {
+			int	r, w;
+
+			r = SLAP_EVENT_IS_READ( i );
+			/* writefds was not initialized if nwriters was zero */
+			w = nwriters ? SLAP_EVENT_IS_WRITE( i ) : 0;
+			if ( r || w ) {
+				Debug( LDAP_DEBUG_CONNS, " %d%s%s", i,
+				    r ? "r" : "", w ? "w" : "" );
+				if ( r ) {
+					nrfds++;
+					ns--;
+				}
+				if ( w ) {
+					nwfds++;
+					ns--;
+				}
+			}
+			if ( ns <= 0 ) break;
+		}
+		Debug( LDAP_DEBUG_CONNS, "\n" );
+
+		/* loop through the writers */
+		for ( i = 0; nwfds > 0; i++ ) {
+			ber_socket_t wd;
+			if ( ! SLAP_EVENT_IS_WRITE( i ) ) continue;
+			wd = i;
+
+			SLAP_EVENT_CLR_WRITE( wd );
+			nwfds--;
+
+			Debug( LDAP_DEBUG_CONNS,
+				"daemon: write active on %d\n",
+				wd );
+
+			/*
+			 * NOTE: it is possible that the connection was closed
+			 * and that the stream is now inactive.
+			 * connection_write() must validate the stream is still
+			 * active.
+			 *
+			 * ITS#4338: if the stream is invalid, there is no need to
+			 * close it here. It has already been closed in connection.c.
+			 */
+			if ( connection_write( wd ) < 0 ) {
+				if ( SLAP_EVENT_IS_READ( wd ) ) {
+					SLAP_EVENT_CLR_READ( (unsigned) wd );
+					nrfds--;
+				}
+			}
+		}
+
+		for ( i = 0; nrfds > 0; i++ ) {
+			ber_socket_t rd;
+			if ( ! SLAP_EVENT_IS_READ( i ) ) continue;
+			rd = i;
+			SLAP_EVENT_CLR_READ( rd );
+			nrfds--;
+
+			Debug ( LDAP_DEBUG_CONNS,
+				"daemon: read activity on %d\n", rd );
+			/*
+			 * NOTE: it is possible that the connection was closed
+			 * and that the stream is now inactive.
+			 * connection_read() must valid the stream is still
+			 * active.
+			 */
+
+			connection_read_activate( rd );
+		}
+#else	/* !SLAP_EVENTS_ARE_INDEXED */
+	/* FIXME */
+	/* The events are returned in an arbitrary list. This is true
+	 * for /dev/poll, epoll and kqueue. In order to prioritize things
+	 * so that we can handle wake_sds first, listeners second, and then
+	 * all other connections last (as we do for select), we would need
+	 * to use multiple event handles and cascade them.
+	 *
+	 * That seems like a bit of hassle. So the wake_sds check has been
+	 * skipped. For epoll and kqueue we can associate arbitrary data with
+	 * an event, so we could use pointers to the listener structure
+	 * instead of just the file descriptor. For /dev/poll we have to
+	 * search the listeners array for a matching descriptor.
+	 *
+	 * We now handle wake events when we see them; they are not given
+	 * higher priority.
+	 */
+#ifdef LDAP_DEBUG
+		Debug( LDAP_DEBUG_CONNS, "daemon: activity on:" );
+
+		for ( i = 0; i < ns; i++ ) {
+			int	r, w, fd;
+
+			/* Don't log listener events */
+			if ( SLAP_EVENT_IS_LISTENER( tid, i )
+#ifdef LDAP_CONNECTIONLESS
+				&& !( (SLAP_EVENT_LISTENER( tid, i ))->sl_is_udp )
+#endif /* LDAP_CONNECTIONLESS */
+				)
+			{
+				continue;
+			}
+
+			fd = SLAP_EVENT_FD( tid, i );
+			/* Don't log internal wake events */
+			if ( fd == wake_sds[tid][0] ) continue;
+
+#ifdef HAVE_KQUEUE
+			r = SLAP_EVENT_IS_READ( tid, i );
+			w = SLAP_EVENT_IS_WRITE( tid, i );
+#else
+			r = SLAP_EVENT_IS_READ( i );
+			w = SLAP_EVENT_IS_WRITE( i );
+#endif /* HAVE_KQUEUE */
+			if ( r || w ) {
+				Debug( LDAP_DEBUG_CONNS, " %d%s%s", fd,
+				    r ? "r" : "", w ? "w" : "" );
+			}
+		}
+		Debug( LDAP_DEBUG_CONNS, "\n" );
+#endif /* LDAP_DEBUG */
+
+		for ( i = 0; i < ns; i++ ) {
+			int rc = 1, fd, w = 0, r = 0;
+
+			if ( SLAP_EVENT_IS_LISTENER( tid, i ) ) {
+				rc = slap_listener_activate( SLAP_EVENT_LISTENER( tid, i ) );
+			}
+
+			/* If we found a regular listener, rc is now zero, and we
+			 * can skip the data portion. But if it was a UDP listener
+			 * then rc is still 1, and we want to handle the data.
+			 */
+			if ( rc ) {
+				fd = SLAP_EVENT_FD( tid, i );
+
+				/* Handle wake events */
+				if ( fd == wake_sds[tid][0] ) {
+					char c[BUFSIZ];
+					waking = 0;
+					(void)!tcp_read( SLAP_FD2SOCK(wake_sds[tid][0]), c, sizeof(c) );
+					continue;
+				}
+
+#ifdef HAVE_KQUEUE
+				if ( SLAP_EVENT_IS_WRITE( tid, i ) )
+#else
+				if ( SLAP_EVENT_IS_WRITE( i ) )
+#endif  /* HAVE_KQUEUE */
+				{
+					Debug( LDAP_DEBUG_CONNS,
+						"daemon: write active on %d\n",
+						fd );
+
+					SLAP_EVENT_CLR_WRITE( i );
+					w = 1;
+
+					/*
+					 * NOTE: it is possible that the connection was closed
+					 * and that the stream is now inactive.
+					 * connection_write() must valid the stream is still
+					 * active.
+					 */
+					if ( connection_write( fd ) < 0 ) {
+						continue;
+					}
+				}
+				/* If event is a read */
+#ifdef HAVE_KQUEUE
+				if ( SLAP_EVENT_IS_READ( tid, i ))
+#else
+				if ( SLAP_EVENT_IS_READ( i ))
+#endif /* HAVE_KQUEUE */
+				{
+					r = 1;
+					Debug( LDAP_DEBUG_CONNS,
+						"daemon: read active on %d\n",
+						fd );
+
+					SLAP_EVENT_CLR_READ( i );
+					connection_read_activate( fd );
+				} else if ( !w ) {
+#ifdef HAVE_EPOLL
+					/* Don't keep reporting the hangup
+					 */
+					if ( SLAP_SOCK_IS_ACTIVE( tid, fd )) {
+						SLAP_EPOLL_SOCK_SET( tid, fd, EPOLLET );
+					}
+#endif
+				}
+			}
+		}
+#endif	/* SLAP_EVENTS_ARE_INDEXED */
+
+		/* Was number of listener threads decreased? */
+		if ( ldap_pvt_thread_pool_pausecheck_native( &connection_pool )) {
+			/* decreased, let this thread finish */
+			if ( tid >= slapd_daemon_threads )
+				break;
+		}
+
+#ifndef HAVE_YIELDING_SELECT
+		ldap_pvt_thread_yield();
+#endif /* ! HAVE_YIELDING_SELECT */
+	}
+
+	/* Only thread 0 handles shutdown */
+	if ( tid )
+		return NULL;
+
+	if ( slapd_shutdown == 1 ) {
+		Debug( LDAP_DEBUG_ANY,
+			"daemon: shutdown requested and initiated.\n" );
+
+	} else if ( slapd_shutdown == 2 ) {
+#ifdef HAVE_NT_SERVICE_MANAGER
+			Debug( LDAP_DEBUG_ANY,
+			       "daemon: shutdown initiated by Service Manager.\n" );
+#else /* !HAVE_NT_SERVICE_MANAGER */
+			Debug( LDAP_DEBUG_ANY,
+			       "daemon: abnormal condition, shutdown initiated.\n" );
+#endif /* !HAVE_NT_SERVICE_MANAGER */
+	} else {
+		Debug( LDAP_DEBUG_ANY,
+		       "daemon: no active streams, shutdown initiated.\n" );
+	}
+
+	close_listeners( 1 );
+
+	if ( !slapd_gentle_shutdown ) {
+		slapd_abrupt_shutdown = 1;
+		connections_shutdown();
+	}
+
+#ifdef HAVE_KQUEUE
+     close( slap_daemon[tid].sd_kq );
+#endif
+
+	if ( LogTest( LDAP_DEBUG_ANY )) {
+		int t = ldap_pvt_thread_pool_backload( &connection_pool );
+		Debug( LDAP_DEBUG_ANY,
+			"slapd shutdown: waiting for %d operations/tasks to finish\n",
+			t );
+	}
+	ldap_pvt_thread_pool_close( &connection_pool, 1 );
+
+	return NULL;
+}
+
+typedef struct slap_tid_waiter {
+	int num_tids;
+	ldap_pvt_thread_t tids[0];
+} slap_tid_waiter;
+
+static void *
+slapd_daemon_tid_cleanup(
+	void *ctx,
+	void *ptr )
+{
+	slap_tid_waiter *tids = ptr;
+	int i;
+
+	for ( i=0; i<tids->num_tids; i++ )
+		ldap_pvt_thread_join( tids->tids[i], (void *)NULL );
+	ch_free( ptr );
+	return NULL;
+}
+
+int
+slapd_daemon_resize( int newnum )
+{
+	int i, rc;
+
+	if ( newnum == slapd_daemon_threads )
+		return 0;
+
+	/* wake up all current listener threads */
+	for ( i=0; i<slapd_daemon_threads; i++ )
+		WAKE_LISTENER(i,1);
+
+	/* mutexes may not survive realloc, so destroy & recreate later */
+	for ( i=0; i<slapd_daemon_threads; i++ )
+		ldap_pvt_thread_mutex_destroy( &slap_daemon[i].sd_mutex );
+
+	if ( newnum > slapd_daemon_threads ) {
+		wake_sds = ch_realloc( wake_sds, newnum * sizeof( sdpair ));
+		slap_daemon = ch_realloc( slap_daemon, newnum * sizeof( slap_daemon_st ));
+
+		for ( i=slapd_daemon_threads; i<newnum; i++ )
+		{
+			memset( &slap_daemon[i], 0, sizeof( slap_daemon_st ));
+			if( (rc = lutil_pair( wake_sds[i] )) < 0 ) {
+				Debug( LDAP_DEBUG_ANY,
+					"daemon: lutil_pair() failed rc=%d\n", rc );
+				return rc;
+			}
+			ber_pvt_socket_set_nonblock( wake_sds[i][1], 1 );
+
+			SLAP_SOCK_INIT(i);
+		}
+
+		for ( i=0; i<newnum; i++ )
+			ldap_pvt_thread_mutex_init( &slap_daemon[i].sd_mutex );
+
+		slapd_socket_realloc( newnum );
+
+		for ( i=slapd_daemon_threads; i<newnum; i++ )
+		{
+			/* listener as a separate THREAD */
+			rc = ldap_pvt_thread_create( &slap_daemon[i].sd_tid,
+				0, slapd_daemon_task, &slap_daemon[i] );
+
+			if ( rc != 0 ) {
+				Debug( LDAP_DEBUG_ANY,
+				"listener ldap_pvt_thread_create failed (%d)\n", rc );
+				return rc;
+			}
+		}
+	} else {
+		int j;
+		slap_tid_waiter *tids = ch_malloc( sizeof(slap_tid_waiter) +
+			((slapd_daemon_threads - newnum) * sizeof(ldap_pvt_thread_t )));
+		slapd_socket_realloc( newnum );
+		tids->num_tids = slapd_daemon_threads - newnum;
+		for ( i=newnum, j=0; i<slapd_daemon_threads; i++, j++ ) {
+			tids->tids[j] = slap_daemon[i].sd_tid;
+#ifdef HAVE_WINSOCK
+			if ( wake_sds[i][1] != INVALID_SOCKET &&
+				SLAP_FD2SOCK( wake_sds[i][1] ) != SLAP_FD2SOCK( wake_sds[i][0] ))
+#endif /* HAVE_WINSOCK */
+				tcp_close( SLAP_FD2SOCK(wake_sds[i][1]) );
+#ifdef HAVE_WINSOCK
+			if ( wake_sds[i][0] != INVALID_SOCKET )
+#endif /* HAVE_WINSOCK */
+				tcp_close( SLAP_FD2SOCK(wake_sds[i][0]) );
+
+			SLAP_SOCK_DESTROY( i );
+		}
+
+		wake_sds = ch_realloc( wake_sds, newnum * sizeof( sdpair ));
+		slap_daemon = ch_realloc( slap_daemon, newnum * sizeof( slap_daemon_st ));
+		for ( i=0; i<newnum; i++ )
+			ldap_pvt_thread_mutex_init( &slap_daemon[i].sd_mutex );
+		ldap_pvt_thread_pool_submit( &connection_pool,
+			slapd_daemon_tid_cleanup, (void *) tids );
+	}
+	slapd_daemon_threads = newnum;
+	slapd_daemon_mask = newnum - 1;
+	return 0;
+}
+
+#ifdef LDAP_CONNECTIONLESS
+static int
+connectionless_init( void )
+{
+	int l;
+
+	for ( l = 0; slap_listeners[l] != NULL; l++ ) {
+		Listener *lr = slap_listeners[l];
+		Connection *c;
+
+		if ( !lr->sl_is_udp ) {
+			continue;
+		}
+
+		c = connection_init( lr->sl_sd, lr, "", "",
+			CONN_IS_UDP, (slap_ssf_t) 0, NULL
+			LDAP_PF_LOCAL_SENDMSG_ARG(NULL));
+
+		if ( !c ) {
+			Debug( LDAP_DEBUG_TRACE,
+				"connectionless_init: failed on %s (%d)\n",
+				lr->sl_url.bv_val, lr->sl_sd );
+			return -1;
+		}
+		lr->sl_is_udp++;
+	}
+
+	return 0;
+}
+#endif /* LDAP_CONNECTIONLESS */
+
+int
+slapd_daemon( void )
+{
+	int i, rc;
+
+#ifdef LDAP_CONNECTIONLESS
+	connectionless_init();
+#endif /* LDAP_CONNECTIONLESS */
+
+	SLAP_SOCK_INIT2();
+
+	/* daemon_init only inits element 0 */
+	for ( i=1; i<slapd_daemon_threads; i++ )
+	{
+		ldap_pvt_thread_mutex_init( &slap_daemon[i].sd_mutex );
+
+		if( (rc = lutil_pair( wake_sds[i] )) < 0 ) {
+			Debug( LDAP_DEBUG_ANY,
+				"daemon: lutil_pair() failed rc=%d\n", rc );
+			return rc;
+		}
+		ber_pvt_socket_set_nonblock( wake_sds[i][1], 1 );
+
+		SLAP_SOCK_INIT(i);
+	}
+
+	for ( i=0; i<slapd_daemon_threads; i++ )
+	{
+		/* listener as a separate THREAD */
+		rc = ldap_pvt_thread_create( &slap_daemon[i].sd_tid,
+			0, slapd_daemon_task, &slap_daemon[i] );
+
+		if ( rc != 0 ) {
+			Debug( LDAP_DEBUG_ANY,
+			"listener ldap_pvt_thread_create failed (%d)\n", rc );
+			return rc;
+		}
+	}
+
+	ldap_pvt_thread_mutex_lock( &slapd_init_mutex );
+	while ( !slapd_ready && !slapd_shutdown ) {
+		ldap_pvt_thread_cond_wait( &slapd_init_cond, &slapd_init_mutex );
+	}
+	ldap_pvt_thread_mutex_unlock( &slapd_init_mutex );
+
+	if ( slapd_shutdown ) {
+		Debug( LDAP_DEBUG_ANY,
+			"listener initialization failed\n" );
+		return 1;
+	}
+
+#ifdef HAVE_SYSTEMD
+	rc = sd_notify( 1, "READY=1" );
+	if ( rc < 0 ) {
+		Debug( LDAP_DEBUG_ANY,
+			"systemd sd_notify failed (%d)\n", rc );
+	}
+#endif /* HAVE_SYSTEMD */
+
+  	/* wait for the listener threads to complete */
+	for ( i=0; i<slapd_daemon_threads; i++ )
+		ldap_pvt_thread_join( slap_daemon[i].sd_tid, (void *)NULL );
+
+	destroy_listeners();
+
+	return 0;
+}
+
+static int
+sockinit( void )
+{
+#if defined( HAVE_WINSOCK2 )
+	WORD wVersionRequested;
+	WSADATA wsaData;
+	int err;
+
+	wVersionRequested = MAKEWORD( 2, 0 );
+
+	err = WSAStartup( wVersionRequested, &wsaData );
+	if ( err != 0 ) {
+		/* Tell the user that we couldn't find a usable */
+		/* WinSock DLL.					 */
+		return -1;
+	}
+
+	/* Confirm that the WinSock DLL supports 2.0.*/
+	/* Note that if the DLL supports versions greater    */
+	/* than 2.0 in addition to 2.0, it will still return */
+	/* 2.0 in wVersion since that is the version we	     */
+	/* requested.					     */
+
+	if ( LOBYTE( wsaData.wVersion ) != 2 ||
+		HIBYTE( wsaData.wVersion ) != 0 )
+	{
+	    /* Tell the user that we couldn't find a usable */
+	    /* WinSock DLL.				     */
+	    WSACleanup();
+	    return -1;
+	}
+
+	/* The WinSock DLL is acceptable. Proceed. */
+#elif defined( HAVE_WINSOCK )
+	WSADATA wsaData;
+	if ( WSAStartup( 0x0101, &wsaData ) != 0 ) return -1;
+#endif /* ! HAVE_WINSOCK2 && ! HAVE_WINSOCK */
+
+	return 0;
+}
+
+static int
+sockdestroy( void )
+{
+#if defined( HAVE_WINSOCK2 ) || defined( HAVE_WINSOCK )
+	WSACleanup();
+#endif /* HAVE_WINSOCK2 || HAVE_WINSOCK */
+
+	return 0;
+}
+
+RETSIGTYPE
+slap_sig_shutdown( int sig )
+{
+	int save_errno = errno;
+	int i;
+
+#if 0
+	Debug(LDAP_DEBUG_TRACE, "slap_sig_shutdown: signal %d\n", sig);
+#endif
+
+	/*
+	 * If the NT Service Manager is controlling the server, we don't
+	 * want SIGBREAK to kill the server. For some strange reason,
+	 * SIGBREAK is generated when a user logs out.
+	 */
+
+#if defined(HAVE_NT_SERVICE_MANAGER) && defined(SIGBREAK)
+	if (is_NT_Service && sig == SIGBREAK) {
+		/* empty */;
+	} else
+#endif /* HAVE_NT_SERVICE_MANAGER && SIGBREAK */
+#ifdef SIGHUP
+	if (sig == SIGHUP && global_gentlehup && slapd_gentle_shutdown == 0) {
+		slapd_gentle_shutdown = 1;
+	} else
+#endif /* SIGHUP */
+	{
+		slapd_shutdown = 1;
+	}
+
+	for (i=0; i<slapd_daemon_threads; i++) {
+		WAKE_LISTENER(i,1);
+	}
+
+	/* reinstall self */
+	(void) SIGNAL_REINSTALL( sig, slap_sig_shutdown );
+
+	errno = save_errno;
+}
+
+RETSIGTYPE
+slap_sig_wake( int sig )
+{
+	int save_errno = errno;
+
+	WAKE_LISTENER(0,1);
+
+	/* reinstall self */
+	(void) SIGNAL_REINSTALL( sig, slap_sig_wake );
+
+	errno = save_errno;
+}
+
+int
+slap_pause_server( void )
+{
+	BackendInfo *bi;
+	int rc = LDAP_SUCCESS;
+
+	rc = ldap_pvt_thread_pool_pause( &connection_pool );
+
+	LDAP_STAILQ_FOREACH(bi, &backendInfo, bi_next) {
+		if ( bi->bi_pause ) {
+			rc = bi->bi_pause( bi );
+			if ( rc != LDAP_SUCCESS ) {
+				Debug( LDAP_DEBUG_ANY, "slap_pause_server: "
+						"bi_pause failed for backend %s\n",
+						bi->bi_type );
+				return rc;
+			}
+		}
+	}
+
+	return rc;
+}
+
+int
+slap_unpause_server( void )
+{
+	BackendInfo *bi;
+	int rc = LDAP_SUCCESS;
+
+	LDAP_STAILQ_FOREACH(bi, &backendInfo, bi_next) {
+		if ( bi->bi_unpause ) {
+			rc = bi->bi_unpause( bi );
+			if ( rc != LDAP_SUCCESS ) {
+				Debug( LDAP_DEBUG_ANY, "slap_unpause_server: "
+						"bi_unpause failed for backend %s\n",
+						bi->bi_type );
+				return rc;
+			}
+		}
+	}
+
+	rc = ldap_pvt_thread_pool_resume( &connection_pool );
+	return rc;
+}
+
+
+void
+slapd_add_internal( ber_socket_t s, int isactive )
+{
+	if (!isactive) {
+		SET_CLOSE(s);
+	}
+	slapd_add( s, isactive, NULL, -1 );
+}
+
+Listener **
+slapd_get_listeners( void )
+{
+	/* Could return array with no listeners if !listening, but current
+	 * callers mostly look at the URLs.  E.g. syncrepl uses this to
+	 * identify the server, which means it wants the startup arguments.
+	 */
+	return slap_listeners;
+}
+
+/* Reject all incoming requests */
+void
+slap_suspend_listeners( void )
+{
+	int i;
+	for (i=0; slap_listeners[i]; i++) {
+		slap_listeners[i]->sl_mute = 1;
+		listen( slap_listeners[i]->sl_sd, 0 );
+	}
+}
+
+/* Resume after a suspend */
+void
+slap_resume_listeners( void )
+{
+	int i;
+	for (i=0; slap_listeners[i]; i++) {
+		slap_listeners[i]->sl_mute = 0;
+		listen( slap_listeners[i]->sl_sd, SLAPD_LISTEN_BACKLOG );
+	}
+}
+
+void
+slap_wake_listener()
+{
+	WAKE_LISTENER(0,1);
+}
+
+/* return 0 on timeout, 1 on writer ready
+ * -1 on general error
+ */
+int
+slapd_wait_writer( ber_socket_t sd )
+{
+#ifdef HAVE_WINSOCK
+	fd_set writefds;
+	struct timeval tv, *tvp;
+
+	FD_ZERO( &writefds );
+	FD_SET( slapd_ws_sockets[sd], &writefds );
+	if ( global_writetimeout ) {
+		tv.tv_sec = global_writetimeout;
+		tv.tv_usec = 0;
+		tvp = &tv;
+	} else {
+		tvp = NULL;
+	}
+	return select( 0, NULL, &writefds, NULL, tvp );
+#else
+	struct pollfd fds;
+	int timeout = global_writetimeout ? global_writetimeout * 1000 : -1;
+
+	fds.fd = sd;
+	fds.events = POLLOUT;
+
+	return poll( &fds, 1, timeout );
+#endif
+}