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openldap/servers/slapd/daemon.c

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/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2006 The OpenLDAP Foundation.
* 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"
#if 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 /* ! epoll && ! /dev/poll */
#ifdef HAVE_TCPD
# include <tcpd.h>
int allow_severity = LOG_INFO;
int deny_severity = LOG_NOTICE;
# define SLAP_STRING_UNKNOWN STRING_UNKNOWN
#else /* ! TCP Wrappers */
# define SLAP_STRING_UNKNOWN "unknown"
#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;
Listener **slap_listeners = NULL;
#ifndef SLAPD_LISTEN_BACKLOG
#define SLAPD_LISTEN_BACKLOG 1024
#endif /* ! SLAPD_LISTEN_BACKLOG */
static ber_socket_t wake_sds[2];
static int emfile;
static volatile int waking;
#ifdef NO_THREADS
#define WAKE_LISTENER(w) do { \
if ((w) && ++waking < 5) { \
tcp_write( wake_sds[1], "0", 1 ); \
} \
} while (0)
#else /* ! NO_THREADS */
#define WAKE_LISTENER(w) do { \
if (w) { \
tcp_write( wake_sds[1], "0", 1 ); \
} \
} while (0)
#endif /* ! NO_THREADS */
volatile sig_atomic_t slapd_shutdown = 0;
volatile sig_atomic_t slapd_gentle_shutdown = 0;
volatile sig_atomic_t slapd_abrupt_shutdown = 0;
static struct slap_daemon {
ldap_pvt_thread_mutex_t sd_mutex;
#ifdef HAVE_TCPD
ldap_pvt_thread_mutex_t sd_tcpd_mutex;
#endif /* TCP Wrappers */
ber_socket_t sd_nactives;
int sd_nwriters;
#if defined(HAVE_EPOLL)
struct epoll_event *sd_epolls;
int *sd_index;
int sd_epfd;
int sd_nfds;
#elif defined(SLAP_X_DEVPOLL) && defined(HAVE_DEVPOLL)
/* eXperimental */
struct pollfd *sd_pollfd;
int *sd_index;
Listener **sd_l;
int sd_dpfd;
int sd_nfds;
#else /* ! epoll && ! /dev/poll */
#ifndef HAVE_WINSOCK
/* In winsock, accept() returns values higher than dtblsize
so don't bother with this optimization */
int sd_nfds;
#endif /* ! HAVE_WINSOCK */
fd_set sd_actives;
fd_set sd_readers;
fd_set sd_writers;
#endif /* ! epoll && ! /dev/poll */
} 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
*
* private interface should not be used in the code.
*/
#if defined(HAVE_EPOLL)
/***************************************
* Use epoll infrastructure - epoll(4) *
***************************************/
# define SLAP_EVENT_FNAME "epoll"
# define SLAP_EVENTS_ARE_INDEXED 0
# define SLAP_EPOLL_SOCK_IX(s) (slap_daemon.sd_index[(s)])
# define SLAP_EPOLL_SOCK_EP(s) (slap_daemon.sd_epolls[SLAP_EPOLL_SOCK_IX(s)])
# define SLAP_EPOLL_SOCK_EV(s) (SLAP_EPOLL_SOCK_EP(s).events)
# define SLAP_SOCK_IS_ACTIVE(s) (SLAP_EPOLL_SOCK_IX(s) != -1)
# define SLAP_SOCK_NOT_ACTIVE(s) (SLAP_EPOLL_SOCK_IX(s) == -1)
# define SLAP_EPOLL_SOCK_IS_SET(s, mode) (SLAP_EPOLL_SOCK_EV(s) & (mode))
# define SLAP_SOCK_IS_READ(s) SLAP_EPOLL_SOCK_IS_SET((s), EPOLLIN)
# define SLAP_SOCK_IS_WRITE(s) SLAP_EPOLL_SOCK_IS_SET((s), EPOLLOUT)
# define SLAP_EPOLL_SOCK_SET(s, mode) do { \
if ( (SLAP_EPOLL_SOCK_EV(s) & (mode)) != (mode) ) { \
SLAP_EPOLL_SOCK_EV(s) |= (mode); \
epoll_ctl( slap_daemon.sd_epfd, EPOLL_CTL_MOD, (s), \
&SLAP_EPOLL_SOCK_EP(s) ); \
} \
} while (0)
# define SLAP_EPOLL_SOCK_CLR(s, mode) do { \
if ( (SLAP_EPOLL_SOCK_EV(s) & (mode)) ) { \
SLAP_EPOLL_SOCK_EV(s) &= ~(mode); \
epoll_ctl( slap_daemon.sd_epfd, EPOLL_CTL_MOD, s, \
&SLAP_EPOLL_SOCK_EP(s) ); \
} \
} while (0)
# define SLAP_SOCK_SET_READ(s) SLAP_EPOLL_SOCK_SET(s, EPOLLIN)
# define SLAP_SOCK_SET_WRITE(s) SLAP_EPOLL_SOCK_SET(s, EPOLLOUT)
# define SLAP_SOCK_CLR_READ(s) SLAP_EPOLL_SOCK_CLR((s), EPOLLIN)
# define SLAP_SOCK_CLR_WRITE(s) SLAP_EPOLL_SOCK_CLR((s), EPOLLOUT)
# ifdef SLAP_LIGHTWEIGHT_DISPATCHER
# define SLAP_SOCK_SET_SUSPEND(s) \
( slap_daemon.sd_suspend[SLAP_EPOLL_SOCK_IX(s)] = 1 )
# define SLAP_SOCK_CLR_SUSPEND(s) \
( slap_daemon.sd_suspend[SLAP_EPOLL_SOCK_IX(s)] = 0 )
# define SLAP_SOCK_IS_SUSPEND(s) \
( slap_daemon.sd_suspend[SLAP_EPOLL_SOCK_IX(s)] == 1 )
# endif /* SLAP_LIGHTWEIGHT_DISPATCHER */
# define SLAP_EPOLL_EVENT_CLR(i, mode) (revents[(i)].events &= ~(mode))
# define SLAP_EVENT_MAX slap_daemon.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(s, l) do { \
int rc; \
SLAP_EPOLL_SOCK_IX((s)) = slap_daemon.sd_nfds; \
SLAP_EPOLL_SOCK_EP((s)).data.ptr = (l) ? (l) : (void *)(&SLAP_EPOLL_SOCK_IX(s)); \
SLAP_EPOLL_SOCK_EV((s)) = EPOLLIN; \
rc = epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_ADD, \
(s), &SLAP_EPOLL_SOCK_EP((s))); \
if ( rc == 0 ) { \
slap_daemon.sd_nfds++; \
} else { \
Debug( LDAP_DEBUG_ANY, \
"daemon: epoll_ctl(ADD,fd=%d) failed, errno=%d, shutting down\n", \
s, errno, 0 ); \
slapd_shutdown = 2; \
} \
} while (0)
# define SLAP_EPOLL_EV_LISTENER(ptr) \
(((int *)(ptr) >= slap_daemon.sd_index && \
(int *)(ptr) <= &slap_daemon.sd_index[dtblsize]) ? 0 : 1 )
# define SLAP_EPOLL_EV_PTRFD(ptr) (SLAP_EPOLL_EV_LISTENER(ptr) ? \
((Listener *)ptr)->sl_sd : (int *)(ptr) - slap_daemon.sd_index)
# define SLAP_SOCK_DEL(s) do { \
int fd, rc, index = SLAP_EPOLL_SOCK_IX((s)); \
if ( index < 0 ) break; \
rc = epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_DEL, \
(s), &SLAP_EPOLL_SOCK_EP((s))); \
slap_daemon.sd_epolls[index] = \
slap_daemon.sd_epolls[slap_daemon.sd_nfds-1]; \
fd = SLAP_EPOLL_EV_PTRFD(slap_daemon.sd_epolls[index].data.ptr); \
slap_daemon.sd_index[fd] = index; \
slap_daemon.sd_index[(s)] = -1; \
slap_daemon.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(i) SLAP_EPOLL_EV_LISTENER(revents[(i)].data.ptr)
# define SLAP_EVENT_LISTENER(i) ((Listener *)(revents[(i)].data.ptr))
# define SLAP_EVENT_FD(i) SLAP_EPOLL_EV_PTRFD(revents[(i)].data.ptr)
# define SLAP_SOCK_INIT do { \
slap_daemon.sd_epolls = ch_calloc(1, \
( sizeof(struct epoll_event) * 2 \
+ sizeof(int) ) * dtblsize * 2); \
slap_daemon.sd_index = (int *)&slap_daemon.sd_epolls[ 2 * dtblsize ]; \
slap_daemon.sd_epfd = epoll_create( dtblsize ); \
for ( i = 0; i < dtblsize; i++ ) slap_daemon.sd_index[i] = -1; \
} while (0)
# define SLAP_SOCK_DESTROY do { \
if ( slap_daemon.sd_epolls != NULL ) { \
ch_free( slap_daemon.sd_epolls ); \
slap_daemon.sd_epolls = NULL; \
slap_daemon.sd_index = NULL; \
close( slap_daemon.sd_epfd ); \
} \
} while ( 0 )
# define SLAP_EVENT_DECL struct epoll_event *revents
# define SLAP_EVENT_INIT do { \
revents = slap_daemon.sd_epolls + dtblsize; \
} while (0)
# define SLAP_EVENT_WAIT(tvp, nsp) do { \
*(nsp) = epoll_wait( slap_daemon.sd_epfd, revents, \
dtblsize, (tvp) ? (tvp)->tv_sec * 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(s) (slap_daemon.sd_index[(s)])
# define SLAP_DEVPOLL_SOCK_LX(s) (slap_daemon.sd_l[(s)])
# define SLAP_DEVPOLL_SOCK_EP(s) (slap_daemon.sd_pollfd[SLAP_DEVPOLL_SOCK_IX((s))])
# define SLAP_DEVPOLL_SOCK_FD(s) (SLAP_DEVPOLL_SOCK_EP((s)).fd)
# define SLAP_DEVPOLL_SOCK_EV(s) (SLAP_DEVPOLL_SOCK_EP((s)).events)
# define SLAP_SOCK_IS_ACTIVE(s) (SLAP_DEVPOLL_SOCK_IX((s)) != -1)
# define SLAP_SOCK_NOT_ACTIVE(s) (SLAP_DEVPOLL_SOCK_IX((s)) == -1)
# define SLAP_SOCK_IS_SET(s, mode) (SLAP_DEVPOLL_SOCK_EV((s)) & (mode))
# define SLAP_SOCK_IS_READ(s) SLAP_SOCK_IS_SET((s), POLLIN)
# define SLAP_SOCK_IS_WRITE(s) SLAP_SOCK_IS_SET((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(s, pfd, n, what, shdn) do { \
int rc; \
size_t size = (n) * sizeof( struct pollfd ); \
/* FIXME: use pwrite? */ \
rc = write( slap_daemon.sd_dpfd, (pfd), size ); \
if ( rc != size ) { \
Debug( LDAP_DEBUG_ANY, "daemon: " SLAP_EVENT_FNAME ": " \
"%s fd=%d failed errno=%d\n", \
(what), (s), errno ); \
if ( (shdn) ) { \
slapd_shutdown = 2; \
} \
} \
} while (0)
# define SLAP_DEVPOLL_SOCK_SET(s, mode) do { \
fprintf( stderr, "SLAP_SOCK_SET_%s(%d) = %d\n", \
(mode) == POLLIN ? "READ" : "WRITE", (s), \
( (SLAP_DEVPOLL_SOCK_EV((s)) & (mode)) != (mode) ) ); \
if ( (SLAP_DEVPOLL_SOCK_EV((s)) & (mode)) != (mode) ) { \
struct pollfd pfd; \
SLAP_DEVPOLL_SOCK_EV((s)) |= (mode); \
pfd.fd = SLAP_DEVPOLL_SOCK_FD((s)); \
pfd.events = /* (mode) */ SLAP_DEVPOLL_SOCK_EV((s)); \
SLAP_DEVPOLL_WRITE_POLLFD((s), &pfd, 1, "SET", 0); \
} \
} while (0)
# define SLAP_DEVPOLL_SOCK_CLR(s, mode) do { \
fprintf( stderr, "SLAP_SOCK_CLR_%s(%d) = %d\n", \
(mode) == POLLIN ? "READ" : "WRITE", (s), \
( (SLAP_DEVPOLL_SOCK_EV((s)) & (mode)) == (mode) ) ); \
if ((SLAP_DEVPOLL_SOCK_EV((s)) & (mode)) == (mode) ) { \
struct pollfd pfd[2]; \
SLAP_DEVPOLL_SOCK_EV((s)) &= ~(mode); \
pfd[0].fd = SLAP_DEVPOLL_SOCK_FD((s)); \
pfd[0].events = POLLREMOVE; \
pfd[1] = SLAP_DEVPOLL_SOCK_EP((s)); \
SLAP_DEVPOLL_WRITE_POLLFD((s), &pfd[0], 2, "CLR", 0); \
} \
} while (0)
# define SLAP_SOCK_SET_READ(s) SLAP_DEVPOLL_SOCK_SET(s, POLLIN)
# define SLAP_SOCK_SET_WRITE(s) SLAP_DEVPOLL_SOCK_SET(s, POLLOUT)
# define SLAP_SOCK_CLR_READ(s) SLAP_DEVPOLL_SOCK_CLR((s), POLLIN)
# define SLAP_SOCK_CLR_WRITE(s) SLAP_DEVPOLL_SOCK_CLR((s), POLLOUT)
# ifdef SLAP_LIGHTWEIGHT_DISPATCHER
# define SLAP_SOCK_SET_SUSPEND(s) \
( slap_daemon.sd_suspend[SLAP_DEVPOLL_SOCK_IX((s))] = 1 )
# define SLAP_SOCK_CLR_SUSPEND(s) \
( slap_daemon.sd_suspend[SLAP_DEVPOLL_SOCK_IX((s))] = 0 )
# define SLAP_SOCK_IS_SUSPEND(s) \
( slap_daemon.sd_suspend[SLAP_DEVPOLL_SOCK_IX((s))] == 1 )
# endif /* SLAP_LIGHTWEIGHT_DISPATCHER */
# define SLAP_DEVPOLL_EVENT_CLR(i, mode) (revents[(i)].events &= ~(mode))
# define SLAP_EVENT_MAX slap_daemon.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(s, l) do { \
fprintf( stderr, "SLAP_SOCK_ADD(%d, %p)\n", (s), (l) ); \
SLAP_DEVPOLL_SOCK_IX((s)) = slap_daemon.sd_nfds; \
SLAP_DEVPOLL_SOCK_LX((s)) = (l); \
SLAP_DEVPOLL_SOCK_FD((s)) = (s); \
SLAP_DEVPOLL_SOCK_EV((s)) = POLLIN; \
SLAP_DEVPOLL_WRITE_POLLFD((s), &SLAP_DEVPOLL_SOCK_EP((s)), 1, "ADD", 1); \
slap_daemon.sd_nfds++; \
} while (0)
# define SLAP_DEVPOLL_EV_LISTENER(ptr) ((ptr) != NULL)
# define SLAP_SOCK_DEL(s) do { \
int fd, index = SLAP_DEVPOLL_SOCK_IX((s)); \
fprintf( stderr, "SLAP_SOCK_DEL(%d)\n", (s) ); \
if ( index < 0 ) break; \
if ( index < slap_daemon.sd_nfds - 1 ) { \
struct pollfd pfd = slap_daemon.sd_pollfd[index]; \
fd = slap_daemon.sd_pollfd[slap_daemon.sd_nfds - 1].fd; \
slap_daemon.sd_pollfd[index] = slap_daemon.sd_pollfd[slap_daemon.sd_nfds - 1]; \
slap_daemon.sd_pollfd[slap_daemon.sd_nfds - 1] = pfd; \
slap_daemon.sd_index[fd] = index; \
} \
slap_daemon.sd_index[(s)] = -1; \
slap_daemon.sd_pollfd[slap_daemon.sd_nfds - 1].events = POLLREMOVE; \
SLAP_DEVPOLL_WRITE_POLLFD((s), &slap_daemon.sd_pollfd[slap_daemon.sd_nfds - 1], 1, "DEL", 0); \
slap_daemon.sd_pollfd[slap_daemon.sd_nfds - 1].events = 0; \
slap_daemon.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(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(i) SLAP_DEVPOLL_EV_LISTENER(SLAP_DEVPOLL_SOCK_LX(SLAP_EVENT_FD((i))))
# define SLAP_EVENT_LISTENER(i) SLAP_DEVPOLL_SOCK_LX(SLAP_EVENT_FD((i)))
# define SLAP_SOCK_INIT do { \
slap_daemon.sd_pollfd = ch_calloc( 1, \
( sizeof(struct pollfd) * 2 \
+ sizeof( int ) \
+ sizeof( Listener * ) ) * dtblsize ); \
slap_daemon.sd_index = (int *)&slap_daemon.sd_pollfd[ 2 * dtblsize ]; \
slap_daemon.sd_l = (Listener **)&slap_daemon.sd_index[ dtblsize ]; \
slap_daemon.sd_dpfd = open( SLAP_EVENT_FNAME, O_RDWR ); \
if ( slap_daemon.sd_dpfd == -1 ) { \
Debug( LDAP_DEBUG_ANY, "daemon: " SLAP_EVENT_FNAME ": " \
"open(\"" SLAP_EVENT_FNAME "\") failed errno=%d\n", \
errno, 0, 0 ); \
SLAP_SOCK_DESTROY; \
return -1; \
} \
for ( i = 0; i < dtblsize; i++ ) { \
slap_daemon.sd_pollfd[i].fd = -1; \
slap_daemon.sd_index[i] = -1; \
} \
} while (0)
# define SLAP_SOCK_DESTROY do { \
if ( slap_daemon.sd_pollfd != NULL ) { \
ch_free( slap_daemon.sd_pollfd ); \
slap_daemon.sd_pollfd = NULL; \
slap_daemon.sd_index = NULL; \
slap_daemon.sd_l = NULL; \
close( slap_daemon.sd_dpfd ); \
} \
} while ( 0 )
# define SLAP_EVENT_DECL struct pollfd *revents
# define SLAP_EVENT_INIT do { \
revents = &slap_daemon.sd_pollfd[ dtblsize ]; \
} while (0)
# define SLAP_EVENT_WAIT(tvp, nsp) do { \
struct dvpoll sd_dvpoll; \
sd_dvpoll.dp_timeout = (tvp) ? (tvp)->tv_sec * 1000 : -1; \
sd_dvpoll.dp_nfds = dtblsize; \
sd_dvpoll.dp_fds = revents; \
*(nsp) = ioctl( slap_daemon.sd_dpfd, DP_POLL, &sd_dvpoll ); \
} while (0)
#else /* ! epoll && ! /dev/poll */
/**************************************
* 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 do { \
AC_MEMCPY( &readfds, &slap_daemon.sd_readers, sizeof(fd_set) ); \
if ( nwriters ) { \
AC_MEMCPY( &writefds, &slap_daemon.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 do { \
SLAP_SELECT_CHK_SETSIZE; \
FD_ZERO(&slap_daemon.sd_readers); \
FD_ZERO(&slap_daemon.sd_writers); \
} while (0)
# define SLAP_SOCK_DESTROY
# define SLAP_SOCK_IS_ACTIVE(fd) FD_ISSET((fd), &slap_daemon.sd_actives)
# define SLAP_SOCK_IS_READ(fd) FD_ISSET((fd), &slap_daemon.sd_readers)
# define SLAP_SOCK_IS_WRITE(fd) FD_ISSET((fd), &slap_daemon.sd_writers)
# define SLAP_SOCK_NOT_ACTIVE(fd) (!SLAP_SOCK_IS_ACTIVE(fd) && \
!SLAP_SOCK_IS_READ(fd) && !SLAP_SOCK_IS_WRITE(fd))
# ifdef HAVE_WINSOCK
# define SLAP_SOCK_SET_READ(fd) do { \
if (!SLAP_SOCK_IS_READ(fd)) { FD_SET((fd), &slap_daemon.sd_readers); } \
} while (0)
# define SLAP_SOCK_SET_WRITE(fd) do { \
if (!SLAP_SOCK_IS_WRITE(fd)) { FD_SET((fd), &slap_daemon.sd_writers); } \
} while (0)
# define SLAP_SELECT_ADDTEST(s)
# define SLAP_EVENT_MAX dtblsize
# else /* ! HAVE_WINSOCK */
# define SLAP_SOCK_SET_READ(fd) FD_SET((fd), &slap_daemon.sd_readers)
# define SLAP_SOCK_SET_WRITE(fd) FD_SET((fd), &slap_daemon.sd_writers)
# define SLAP_EVENT_MAX slap_daemon.sd_nfds
# define SLAP_SELECT_ADDTEST(s) do { \
if ((s) >= slap_daemon.sd_nfds) slap_daemon.sd_nfds = (s)+1; \
} while (0)
# endif /* ! HAVE_WINSOCK */
# define SLAP_SOCK_CLR_READ(fd) FD_CLR((fd), &slap_daemon.sd_readers)
# define SLAP_SOCK_CLR_WRITE(fd) FD_CLR((fd), &slap_daemon.sd_writers)
# define SLAP_SOCK_ADD(s, l) do { \
SLAP_SELECT_ADDTEST((s)); \
FD_SET((s), &slap_daemon.sd_actives); \
FD_SET((s), &slap_daemon.sd_readers); \
} while (0)
# define SLAP_SOCK_DEL(s) do { \
FD_CLR((s), &slap_daemon.sd_actives); \
FD_CLR((s), &slap_daemon.sd_readers); \
FD_CLR((s), &slap_daemon.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(tvp, nsp) do { \
*(nsp) = select( SLAP_EVENT_MAX, &readfds, \
nwriters > 0 ? &writefds : NULL, NULL, (tvp) ); \
} while (0)
#endif /* ! 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 ) {
char *host = ldap_pvt_get_fqdn( NULL );
if ( host != NULL ) {
slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i],
strlen( host ) +
sizeof( LDAP_SRVTYPE_PREFIX ) );
strcpy( lutil_strcopy(slapd_srvurls[i],
LDAP_SRVTYPE_PREFIX ), host );
ch_free( host );
}
} else if ( strcmp( slapd_srvurls[i], "ldaps:///" ) == 0 ) {
char *host = ldap_pvt_get_fqdn( NULL );
if ( host != NULL ) {
slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i],
strlen( host ) +
sizeof( LDAPS_SRVTYPE_PREFIX ) );
strcpy( lutil_strcopy(slapd_srvurls[i],
LDAPS_SRVTYPE_PREFIX ), host );
ch_free( host );
}
}
}
/* 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, 0, 0 );
}
}
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 */
/*
* 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 )
{
ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
assert( SLAP_SOCK_NOT_ACTIVE(s) );
if ( isactive ) slap_daemon.sd_nactives++;
SLAP_SOCK_ADD(s, sl);
Debug( LDAP_DEBUG_CONNS, "daemon: added %ldr\n",
(long) s, 0, 0 );
ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
#ifdef SLAP_LIGHTWEIGHT_DISPATCHER
WAKE_LISTENER(1);
#endif /* SLAP_LIGHTWEIGHT_DISPATCHER */
}
/*
* NOTE: unused
*/
void
slapd_sd_lock( void )
{
ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
}
/*
* NOTE: unused
*/
void
slapd_sd_unlock( void )
{
ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
}
/*
* 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;
if ( !locked )
ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
assert( SLAP_SOCK_IS_ACTIVE( s ));
if ( wasactive ) slap_daemon.sd_nactives--;
waswriter = SLAP_SOCK_IS_WRITE(s);
wasreader = SLAP_SOCK_IS_READ(s);
Debug( LDAP_DEBUG_CONNS, "daemon: removing %ld%s%s\n",
(long) s,
wasreader ? "r" : "",
waswriter ? "w" : "" );
if ( waswriter ) slap_daemon.sd_nwriters--;
SLAP_SOCK_DEL(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.
*/
if ( emfile ) {
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--;
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( &slap_daemon.sd_mutex );
WAKE_LISTENER(wake || slapd_gentle_shutdown == 2);
}
void
slapd_clr_write( ber_socket_t s, int wake )
{
ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
assert( SLAP_SOCK_IS_ACTIVE( s ));
if ( SLAP_SOCK_IS_WRITE( s )) {
SLAP_SOCK_CLR_WRITE( s );
slap_daemon.sd_nwriters--;
}
ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
WAKE_LISTENER(wake);
}
void
slapd_set_write( ber_socket_t s, int wake )
{
ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
assert( SLAP_SOCK_IS_ACTIVE( s ));
if ( !SLAP_SOCK_IS_WRITE( s )) {
SLAP_SOCK_SET_WRITE( s );
slap_daemon.sd_nwriters++;
}
ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
WAKE_LISTENER(wake);
}
int
slapd_clr_read( ber_socket_t s, int wake )
{
int rc = 1;
ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
if ( SLAP_SOCK_IS_ACTIVE( s )) {
SLAP_SOCK_CLR_READ( s );
rc = 0;
}
ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
if ( !rc )
WAKE_LISTENER(wake);
return rc;
}
void
slapd_set_read( ber_socket_t s, int wake )
{
ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
assert( SLAP_SOCK_IS_ACTIVE( s ));
if (!SLAP_SOCK_IS_READ( s )) SLAP_SOCK_SET_READ( s );
ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
WAKE_LISTENER(wake);
}
static void
slapd_close( ber_socket_t s )
{
Debug( LDAP_DEBUG_CONNS, "daemon: closing %ld\n",
(long) s, 0, 0 );
tcp_close(s);
}
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 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 ) {
*sal = ch_malloc(2 * sizeof(void *));
if (*sal == NULL) return -1;
sap = *sal;
*sap = ch_malloc(sizeof(struct sockaddr_un));
if (*sap == NULL) goto errexit;
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, 0, 0);
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), 0, 0);
return -1;
}
sai = res;
for (n=2; (sai = sai->ai_next) != NULL; n++) {
/* EMPTY */ ;
}
*sal = ch_calloc(n, sizeof(void *));
if (*sal == NULL) return -1;
sap = *sal;
*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", 0, 0, 0 );
freeaddrinfo(res);
goto errexit;
}
switch (sai->ai_family) {
# ifdef LDAP_PF_INET6
case AF_INET6:
*sap = ch_malloc(sizeof(struct sockaddr_in6));
if (*sap == NULL) {
freeaddrinfo(res);
goto errexit;
}
*(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));
if (*sap == NULL) {
freeaddrinfo(res);
goto errexit;
}
*(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, 0, 0);
return -1;
}
for (n = 0; he->h_addr_list[n]; n++) /* empty */;
}
*sal = ch_malloc((n+1) * sizeof(void *));
if (*sal == NULL) return -1;
sap = *sal;
for ( i = 0; i<n; i++ ) {
sap[i] = ch_malloc(sizeof(struct sockaddr_in));
if (*sap == NULL) goto errexit;
(void)memset( (void *)sap[i], '\0', 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, **psal;
int socktype = SOCK_STREAM; /* default to COTS */
#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, 0 );
return rc;
}
l.sl_url.bv_val = NULL;
l.sl_mute = 0;
#ifdef SLAP_LIGHTWEIGHT_DISPATCHER
l.sl_busy = 0;
#endif /* SLAP_LIGHTWEIGHT_DISPATCHER */
#ifndef HAVE_TLS
if( ldap_pvt_url_scheme2tls( lud->lud_scheme ) ) {
Debug( LDAP_DEBUG_ANY, "daemon: TLS not supported (%s)\n",
url, 0, 0 );
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 */
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, 0, 0);
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 */
ldap_free_urldesc( lud );
if ( err ) 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 */
l.sl_sd = socket( (*sal)->sa_family, socktype, 0);
if ( l.sl_sd == AC_SOCKET_INVALID ) {
int err = sock_errno();
Debug( LDAP_DEBUG_ANY,
"daemon: %s socket() failed errno=%d (%s)\n",
af, err, sock_errstr(err) );
sal++;
continue;
}
#ifndef HAVE_WINSOCK
if ( l.sl_sd >= dtblsize ) {
Debug( LDAP_DEBUG_ANY,
"daemon: listener descriptor %ld is too great %ld\n",
(long) l.sl_sd, (long) dtblsize, 0 );
tcp_close( l.sl_sd );
sal++;
continue;
}
#endif /* ! HAVE_WINSOCK */
#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( l.sl_sd, 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) );
}
#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( l.sl_sd, 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) );
}
#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( l.sl_sd, 0, LOCAL_CREDS, &one, sizeof( one ) );
}
#endif /* LOCAL_CREDS */
addrlen = sizeof( struct sockaddr_un );
/* 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 */
{
mode_t old_umask;
old_umask = umask( 0 );
rc = bind( l.sl_sd, *sal, addrlen );
umask( old_umask );
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 ) );
tcp_close( l.sl_sd );
sal++;
continue;
}
}
break;
#endif /* LDAP_PF_LOCAL */
}
switch ( (*sal)->sa_family ) {
#ifdef LDAP_PF_LOCAL
case AF_LOCAL: {
char *addr = ((struct sockaddr_un *)*sal)->sun_path;
l.sl_name.bv_len = strlen(addr) + sizeof("PATH=") - 1;
l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len + 1 );
snprintf( l.sl_name.bv_val, l.sl_name.bv_len + 1,
"PATH=%s", addr );
} break;
#endif /* LDAP_PF_LOCAL */
case AF_INET: {
char *s;
#if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
char addr[INET_ADDRSTRLEN];
inet_ntop( AF_INET, &((struct sockaddr_in *)*sal)->sin_addr,
addr, sizeof(addr) );
s = addr;
#else /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
s = inet_ntoa( ((struct sockaddr_in *) *sal)->sin_addr );
#endif /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
port = ntohs( ((struct sockaddr_in *)*sal) ->sin_port );
l.sl_name.bv_val =
ber_memalloc( sizeof("IP=255.255.255.255:65535") );
snprintf( l.sl_name.bv_val, sizeof("IP=255.255.255.255:65535"),
"IP=%s:%d",
s != NULL ? s : SLAP_STRING_UNKNOWN, port );
l.sl_name.bv_len = strlen( l.sl_name.bv_val );
} break;
#ifdef LDAP_PF_INET6
case AF_INET6: {
char addr[INET6_ADDRSTRLEN];
inet_ntop( AF_INET6, &((struct sockaddr_in6 *)*sal)->sin6_addr,
addr, sizeof addr);
port = ntohs( ((struct sockaddr_in6 *)*sal)->sin6_port );
l.sl_name.bv_len = strlen(addr) + sizeof("IP= 65535");
l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len );
snprintf( l.sl_name.bv_val, l.sl_name.bv_len, "IP=%s %d",
addr, 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, 0, 0 );
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, 0, 0 );
return -1;
}
Debug( LDAP_DEBUG_TRACE, "daemon: listener initialized %s\n",
l.sl_url.bv_val, 0, 0 );
return 0;
}
static int sockinit(void);
static int sockdestroy(void);
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>", 0, 0 );
ldap_pvt_thread_mutex_init( &slap_daemon.sd_mutex );
#ifdef HAVE_TCPD
ldap_pvt_thread_mutex_init( &slap_daemon.sd_tcpd_mutex );
#endif /* TCP Wrappers */
if( (rc = sockinit()) != 0 ) return rc;
#ifdef HAVE_SYSCONF
dtblsize = sysconf( _SC_OPEN_MAX );
#elif HAVE_GETDTABLESIZE
dtblsize = getdtablesize();
#else /* ! HAVE_SYSCONF && ! HAVE_GETDTABLESIZE */
dtblsize = FD_SETSIZE;
#endif /* ! HAVE_SYSCONF && ! HAVE_GETDTABLESIZE */
/* 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 ) {
Debug( LDAP_DEBUG_ANY,
"daemon: lutil_pair() failed rc=%d\n", rc, 0, 0 );
return rc;
}
SLAP_SOCK_INIT;
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, 0, 0 );
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], 0, 0 );
}
if( i == 0 ) {
Debug( LDAP_DEBUG_ANY, "daemon_init: no listeners to open (%s)\n",
urls, 0, 0 );
ldap_charray_free( u );
return -1;
}
Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners to open...\n",
i, 0, 0 );
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, 0, 0 );
#ifdef HAVE_SLP
if( slapd_register_slp ) {
slapd_slp_init( urls );
slapd_slp_reg();
}
#endif /* HAVE_SLP */
ldap_charray_free( u );
return !i;
}
int
slapd_daemon_destroy( void )
{
connections_destroy();
tcp_close( wake_sds[1] );
tcp_close( wake_sds[0] );
sockdestroy();
#ifdef HAVE_SLP
if( slapd_register_slp ) {
slapd_slp_dereg();
slapd_slp_deinit();
}
#endif /* HAVE_SLP */
#ifdef HAVE_TCPD
ldap_pvt_thread_mutex_destroy( &slap_daemon.sd_tcpd_mutex );
#endif /* TCP Wrappers */
ldap_pvt_thread_mutex_destroy( &slap_daemon.sd_mutex );
return 0;
}
static void
close_listeners(
int remove )
{
int l;
for ( l = 0; slap_listeners[l] != NULL; l++ ) {
Listener *lr = slap_listeners[l];
if ( lr->sl_sd != AC_SOCKET_INVALID ) {
if ( remove ) slapd_remove( lr->sl_sd, 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( lr->sl_sd );
}
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 );
slap_listeners[l] = NULL;
}
}
static int
slap_listener(
Listener *sl )
{
Sockaddr from;
ber_socket_t s;
socklen_t len = sizeof(from);
long id;
slap_ssf_t ssf = 0;
struct berval authid = BER_BVNULL;
#ifdef SLAPD_RLOOKUPS
char hbuf[NI_MAXHOST];
#endif /* SLAPD_RLOOKUPS */
char *dnsname = NULL;
char *peeraddr = NULL;
#ifdef LDAP_PF_LOCAL
char peername[MAXPATHLEN + sizeof("PATH=")];
#elif defined(LDAP_PF_INET6)
char peername[sizeof("IP=ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 65535")];
#else /* ! LDAP_PF_LOCAL && ! LDAP_PF_INET6 */
char peername[sizeof("IP=255.255.255.255:65336")];
#endif /* LDAP_PF_LOCAL */
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( sl->sl_sd, (struct sockaddr *) &from, &len );
#ifdef SLAP_LIGHTWEIGHT_DISPATCHER
/* Resume the listener FD to allow concurrent-processing of
* additional incoming connections.
*/
sl->sl_busy = 0;
WAKE_LISTENER(1);
#endif /* SLAP_LIGHTWEIGHT_DISPATCHER */
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( &slap_daemon.sd_mutex );
emfile++;
/* Stop listening until an existing session closes */
sl->sl_mute = 1;
ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
}
Debug( LDAP_DEBUG_ANY,
"daemon: accept(%ld) failed errno=%d (%s)\n",
(long) sl->sl_sd, err, sock_errstr(err) );
ldap_pvt_thread_yield();
return 0;
}
#ifndef HAVE_WINSOCK
/* make sure descriptor number isn't too great */
if ( s >= dtblsize ) {
Debug( LDAP_DEBUG_ANY,
"daemon: %ld beyond descriptor table size %ld\n",
(long) s, (long) dtblsize, 0 );
slapd_close(s);
ldap_pvt_thread_yield();
return 0;
}
#endif /* ! HAVE_WINSOCK */
#ifdef LDAP_DEBUG
ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
/* newly accepted stream should not be in any of the FD SETS */
assert( SLAP_SOCK_NOT_ACTIVE( s ));
ldap_pvt_thread_mutex_unlock( &slap_daemon.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) s, err, sock_errstr(err) );
}
#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) s, err, sock_errstr(err) );
}
#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) s, 0 );
switch ( from.sa_addr.sa_family ) {
# ifdef LDAP_PF_LOCAL
case AF_LOCAL:
/* 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;
if( getpeereid( s, &uid, &gid ) == 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:
if ( IN6_IS_ADDR_V4MAPPED(&from.sa_in6_addr.sin6_addr) ) {
peeraddr = inet_ntoa( *((struct in_addr *)
&from.sa_in6_addr.sin6_addr.s6_addr[12]) );
sprintf( peername, "IP=%s:%d",
peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
(unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
} else {
char addr[INET6_ADDRSTRLEN];
peeraddr = (char *) inet_ntop( AF_INET6,
&from.sa_in6_addr.sin6_addr,
addr, sizeof addr );
sprintf( peername, "IP=%s %d",
peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
(unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
}
break;
# endif /* LDAP_PF_INET6 */
case AF_INET:
peeraddr = inet_ntoa( from.sa_in_addr.sin_addr );
sprintf( peername, "IP=%s:%d",
peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
(unsigned) ntohs( from.sa_in_addr.sin_port ) );
break;
default:
slapd_close(s);
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;
ldap_pvt_thread_mutex_lock( &slap_daemon.sd_tcpd_mutex );
rc = hosts_ctl("slapd",
dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
SLAP_STRING_UNKNOWN );
ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_tcpd_mutex );
if ( !rc ) {
/* DENY ACCESS */
Statslog( LDAP_DEBUG_STATS,
"fd=%ld DENIED from %s (%s)\n",
(long) s,
dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
0, 0 );
slapd_close(s);
return 0;
}
}
#endif /* HAVE_TCPD */
}
id = connection_init(s, sl,
dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
peername,
#ifdef HAVE_TLS
sl->sl_is_tls ? CONN_IS_TLS : 0,
#else /* ! HAVE_TLS */
0,
#endif /* ! HAVE_TLS */
ssf,
authid.bv_val ? &authid : NULL );
if( authid.bv_val ) ch_free(authid.bv_val);
if( id < 0 ) {
Debug( LDAP_DEBUG_ANY,
"daemon: connection_init(%ld, %s, %s) failed.\n",
(long) s, peername, sl->sl_name.bv_val );
slapd_close(s);
return 0;
}
Statslog( LDAP_DEBUG_STATS,
"conn=%ld fd=%ld ACCEPT from %s (%s)\n",
id, (long) s, peername, sl->sl_name.bv_val,
0 );
return 0;
}
#ifdef SLAP_LIGHTWEIGHT_DISPATCHER
static void*
slap_listener_thread(
void* ctx,
void* ptr )
{
int rc;
rc = slap_listener( (Listener*)ptr );
if( rc != LDAP_SUCCESS ) {
Debug( LDAP_DEBUG_ANY,
"listener_thread: failed %d", rc, 0, 0 );
}
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" : "", 0 );
sl->sl_busy++;
rc = ldap_pvt_thread_pool_submit( &connection_pool,
slap_listener_thread, (void *) sl );
if( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
"listener_activate(%d): submit failed (%d)\n",
sl->sl_sd, rc, 0 );
}
return rc;
}
#endif /* SLAP_LIGHTWEIGHT_DISPATCHER */
static void *
slapd_daemon_task(
void *ptr )
{
int l;
time_t last_idle_check = 0;
struct timeval idle;
int ebadf = 0;
#define SLAPD_IDLE_CHECK_LIMIT 4
if ( global_idletimeout > 0 ) {
last_idle_check = slap_get_time();
/* Set the select timeout.
* Don't just truncate, preserve the fractions of
* seconds to prevent sleeping for zero time.
*/
idle.tv_sec = global_idletimeout / SLAPD_IDLE_CHECK_LIMIT;
idle.tv_usec = global_idletimeout - \
( idle.tv_sec * SLAPD_IDLE_CHECK_LIMIT );
idle.tv_usec *= 1000000 / SLAPD_IDLE_CHECK_LIMIT;
} else {
idle.tv_sec = 0;
idle.tv_usec = 0;
}
slapd_add( wake_sds[0], 0, NULL );
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 */
if ( listen( 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",
0, 0, 0 );
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) );
return (void*)-1;
}
#ifdef SLAP_LIGHTWEIGHT_DISPATCHER
/* make the listening socket non-blocking */
if ( ber_pvt_socket_set_nonblock( slap_listeners[l]->sl_sd, 1 ) < 0 ) {
Debug( LDAP_DEBUG_ANY, "slapd_daemon_task: "
"set nonblocking on a listening socket failed\n",
0, 0, 0 );
slapd_shutdown = 2;
return (void*)-1;
}
#endif /* SLAP_LIGHTWEIGHT_DISPATCHER */
slapd_add( slap_listeners[l]->sl_sd, 0, slap_listeners[l] );
}
#ifdef HAVE_NT_SERVICE_MANAGER
if ( started_event != NULL ) {
ldap_pvt_thread_cond_signal( &started_event );
}
#endif /* HAVE_NT_SERVICE_MANAGER */
#ifdef SLAP_SEM_LOAD_CONTROL
/*
* initialize count and lazyness of a semaphore
*/
(void) ldap_lazy_sem_init(
SLAP_MAX_WORKER_THREADS + 4 /* max workers + margin */,
4 /* lazyness */ );
#endif /* SLAP_SEM_LOAD_CONTROL */
/* 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 ( ( global_idletimeout > 0 ) &&
difftime( last_idle_check +
global_idletimeout/SLAPD_IDLE_CHECK_LIMIT, now ) < 0 )
{
connections_timeout_idle( now );
last_idle_check = now;
}
tv = idle;
#ifdef SIGHUP
if ( slapd_gentle_shutdown ) {
ber_socket_t active;
if ( slapd_gentle_shutdown == 1 ) {
BackendDB *be;
Debug( LDAP_DEBUG_ANY, "slapd gentle shutdown\n", 0, 0, 0 );
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.sd_mutex );
active = slap_daemon.sd_nactives;
ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
if ( active == 0 ) {
slapd_shutdown = 1;
break;
}
}
#endif /* SIGHUP */
at = 0;
ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
nwriters = slap_daemon.sd_nwriters;
for ( l = 0; slap_listeners[l] != NULL; l++ ) {
Listener *lr = slap_listeners[l];
if ( lr->sl_sd == AC_SOCKET_INVALID ) continue;
#ifdef SLAP_LIGHTWEIGHT_DISPATCHER
if ( lr->sl_mute || lr->sl_busy )
#else /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
if ( lr->sl_mute )
#endif /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
{
SLAP_SOCK_CLR_READ( lr->sl_sd );
} else {
SLAP_SOCK_SET_READ( lr->sl_sd );
}
}
SLAP_EVENT_INIT;
nfds = SLAP_EVENT_MAX;
if ( global_idletimeout && slap_daemon.sd_nactives ) at = 1;
ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
if ( at
#if defined(HAVE_YIELDING_SELECT) || defined(NO_THREADS)
&& ( tv.tv_sec || tv.tv_usec )
#endif /* HAVE_YIELDING_SELECT || NO_THREADS */
)
{
tvp = &tv;
} else {
tvp = NULL;
}
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_submit( &connection_pool,
rtask->routine, (void *) rtask );
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 ) {
time_t 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 ( lr->sl_mute ) {
Debug( LDAP_DEBUG_CONNS,
"daemon: " SLAP_EVENT_FNAME ": "
"listen=%d muted\n",
lr->sl_sd, 0, 0 );
continue;
}
#ifdef SLAP_LIGHTWEIGHT_DISPATCHER
if ( lr->sl_busy ) {
Debug( LDAP_DEBUG_CONNS,
"daemon: " SLAP_EVENT_FNAME ": "
"listen=%d busy\n",
lr->sl_sd, 0, 0 );
continue;
}
#endif /* SLAP_LIGHTWEIGHT_DISPATCHER */
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( 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 ) );
}
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",
0, 0, 0 );
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" : "", 0 );
/* FALL THRU */
}
#if SLAP_EVENTS_ARE_INDEXED
if ( SLAP_EVENT_IS_READ( wake_sds[0] ) ) {
char c[BUFSIZ];
SLAP_EVENT_CLR_READ( wake_sds[0] );
waking = 0;
tcp_read( wake_sds[0], c, sizeof(c) );
Debug( LDAP_DEBUG_CONNS, "daemon: waked\n", 0, 0, 0 );
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.
*/
for ( l = 0; slap_listeners[l] != NULL; l++ ) {
int rc;
if ( ns <= 0 ) break;
if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) 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--;
#ifdef SLAP_LIGHTWEIGHT_DISPATCHER
rc = slap_listener_activate( slap_listeners[l] );
#else /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
rc = slap_listener( slap_listeners[l] );
#endif /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
}
/* 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:", 0, 0, 0 );
#ifdef HAVE_WINSOCK
nrfds = readfds.fd_count;
nwfds = writefds.fd_count;
for ( i = 0; i < readfds.fd_count; i++ ) {
Debug( LDAP_DEBUG_CONNS, " %d%s",
readfds.fd_array[i], "r", 0 );
}
for ( i = 0; i < writefds.fd_count; i++ ) {
Debug( LDAP_DEBUG_CONNS, " %d%s",
writefds.fd_array[i], "w", 0 );
}
#else /* ! HAVE_WINSOCK */
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;
}
#endif /* ! HAVE_WINSOCK */
Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
/* loop through the writers */
for ( i = 0; nwfds > 0; i++ ) {
ber_socket_t wd;
#ifdef HAVE_WINSOCK
wd = writefds.fd_array[i];
#else /* ! HAVE_WINSOCK */
if ( ! SLAP_EVENT_IS_WRITE( i ) ) continue;
wd = i;
#endif /* ! HAVE_WINSOCK */
SLAP_EVENT_CLR_WRITE( wd );
nwfds--;
Debug( LDAP_DEBUG_CONNS,
"daemon: write active on %d\n",
wd, 0, 0 );
/*
* 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;
#ifdef HAVE_WINSOCK
rd = readfds.fd_array[i];
#else /* ! HAVE_WINSOCK */
if ( ! SLAP_EVENT_IS_READ( i ) ) continue;
rd = i;
#endif /* ! HAVE_WINSOCK */
SLAP_EVENT_CLR_READ( rd );
nrfds--;
Debug ( LDAP_DEBUG_CONNS,
"daemon: read activity on %d\n", rd, 0, 0 );
/*
* 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.
*/
#ifdef SLAP_LIGHTWEIGHT_DISPATCHER
connection_read_activate( rd );
#else /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
connection_read( rd );
#endif /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
}
#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:", 0, 0, 0 );
for ( i = 0; i < ns; i++ ) {
int r, w;
/* Don't log listener events */
if ( SLAP_EVENT_IS_LISTENER( i )
#ifdef LDAP_CONNECTIONLESS
&& !( (SLAP_EVENT_LISTENER( i ))->sl_is_udp )
#endif /* LDAP_CONNECTIONLESS */
)
{
continue;
}
/* Don't log internal wake events */
if ( SLAP_EVENT_FD( i ) == wake_sds[0] ) continue;
r = SLAP_EVENT_IS_READ( i );
w = SLAP_EVENT_IS_WRITE( i );
if ( r || w ) {
Debug( LDAP_DEBUG_CONNS, " %d%s%s", SLAP_EVENT_FD(i),
r ? "r" : "", w ? "w" : "" );
}
}
Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
#endif /* LDAP_DEBUG */
for ( i = 0; i < ns; i++ ) {
int rc = 1, fd;
if ( SLAP_EVENT_IS_LISTENER( i ) ) {
#ifdef SLAP_LIGHTWEIGHT_DISPATCHER
rc = slap_listener_activate( SLAP_EVENT_LISTENER( i ) );
#else /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
rc = slap_listener( SLAP_EVENT_LISTENER( i ) );
#endif /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
}
/* 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( i );
/* Handle wake events */
if ( fd == wake_sds[0] ) {
char c[BUFSIZ];
waking = 0;
tcp_read( wake_sds[0], c, sizeof(c) );
break;
}
if ( SLAP_EVENT_IS_WRITE( i ) ) {
Debug( LDAP_DEBUG_CONNS,
"daemon: write active on %d\n",
fd, 0, 0 );
SLAP_EVENT_CLR_WRITE( i );
/*
* 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 */
if ( SLAP_EVENT_IS_READ( i ) ) {
Debug( LDAP_DEBUG_CONNS,
"daemon: read active on %d\n",
fd, 0, 0 );
SLAP_EVENT_CLR_READ( i );
#ifdef SLAP_LIGHTWEIGHT_DISPATCHER
connection_read_activate( fd );
#else /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
/*
* 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( fd );
#endif /* ! SLAP_LIGHTWEIGHT_DISPATCHER */
} else {
Debug( LDAP_DEBUG_CONNS,
"daemon: hangup on %d\n", fd, 0, 0 );
}
}
}
#endif /* SLAP_EVENTS_ARE_INDEXED */
#ifndef HAVE_YIELDING_SELECT
ldap_pvt_thread_yield();
#endif /* ! HAVE_YIELDING_SELECT */
}
if ( slapd_shutdown == 1 ) {
Debug( LDAP_DEBUG_ANY,
"daemon: shutdown requested and initiated.\n",
0, 0, 0 );
} else if ( slapd_shutdown == 2 ) {
#ifdef HAVE_NT_SERVICE_MANAGER
Debug( LDAP_DEBUG_ANY,
"daemon: shutdown initiated by Service Manager.\n",
0, 0, 0);
#else /* !HAVE_NT_SERVICE_MANAGER */
Debug( LDAP_DEBUG_ANY,
"daemon: abnormal condition, shutdown initiated.\n",
0, 0, 0 );
#endif /* !HAVE_NT_SERVICE_MANAGER */
} else {
Debug( LDAP_DEBUG_ANY,
"daemon: no active streams, shutdown initiated.\n",
0, 0, 0 );
}
if ( slapd_gentle_shutdown != 2 ) close_listeners ( 0 );
if ( !slapd_gentle_shutdown ) {
slapd_abrupt_shutdown = 1;
connections_shutdown();
}
Debug( LDAP_DEBUG_ANY,
"slapd shutdown: waiting for %d threads to terminate\n",
ldap_pvt_thread_pool_backload( &connection_pool ), 0, 0 );
ldap_pvt_thread_pool_destroy( &connection_pool, 1 );
free( slap_listeners );
slap_listeners = NULL;
return NULL;
}
#ifdef LDAP_CONNECTIONLESS
static int
connectionless_init( void )
{
int l;
for ( l = 0; slap_listeners[l] != NULL; l++ ) {
Listener *lr = slap_listeners[l];
long id;
if ( !lr->sl_is_udp ) {
continue;
}
id = connection_init( lr->sl_sd, lr, "", "",
CONN_IS_UDP, (slap_ssf_t) 0, NULL );
if ( id < 0 ) {
Debug( LDAP_DEBUG_TRACE,
"connectionless_init: failed on %s (%d)\n",
lr->sl_url, lr->sl_sd, 0 );
return -1;
}
lr->sl_is_udp++;
}
return 0;
}
#endif /* LDAP_CONNECTIONLESS */
int
slapd_daemon( void )
{
int rc;
connections_init();
#ifdef LDAP_CONNECTIONLESS
connectionless_init();
#endif /* LDAP_CONNECTIONLESS */
#define SLAPD_LISTENER_THREAD 1
#if defined( SLAPD_LISTENER_THREAD )
{
ldap_pvt_thread_t listener_tid;
/* listener as a separate THREAD */
rc = ldap_pvt_thread_create( &listener_tid,
0, slapd_daemon_task, NULL );
if ( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
"listener ldap_pvt_thread_create failed (%d)\n", rc, 0, 0 );
return rc;
}
/* wait for the listener thread to complete */
ldap_pvt_thread_join( listener_tid, (void *)NULL );
}
#else /* ! SLAPD_LISTENER_THREAD */
/* experimental code */
slapd_daemon_task( NULL );
#endif /* ! SLAPD_LISTENER_THREAD */
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 */
SLAP_SOCK_DESTROY;
return 0;
}
RETSIGTYPE
slap_sig_shutdown( int sig )
{
#if 0
Debug(LDAP_DEBUG_TRACE, "slap_sig_shutdown: signal %d\n", sig, 0, 0);
#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 HAVE_NT_SERVICE_MANAGER && 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;
}
WAKE_LISTENER(1);
/* reinstall self */
(void) SIGNAL_REINSTALL( sig, slap_sig_shutdown );
}
RETSIGTYPE
slap_sig_wake( int sig )
{
WAKE_LISTENER(1);
/* reinstall self */
(void) SIGNAL_REINSTALL( sig, slap_sig_wake );
}
void
slapd_add_internal( ber_socket_t s, int isactive )
{
slapd_add( s, isactive, NULL );
}
Listener **
slapd_get_listeners( void )
{
return slap_listeners;
}
void
slap_wake_listener()
{
WAKE_LISTENER(1);
}
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