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openldap/servers/slapd/daemon.c

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#include "portable.h"
#include <stdio.h>
#include <ac/ctype.h>
#include <ac/errno.h>
#include <ac/signal.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/time.h>
#include <ac/unistd.h>
#include "ldap_defaults.h"
#include "slap.h"
#ifdef HAVE_TCPD
#include <tcpd.h>
int allow_severity = LOG_INFO;
int deny_severity = LOG_NOTICE;
#endif /* TCP Wrappers */
/* globals */
time_t starttime;
ber_socket_t dtblsize;
typedef struct slap_listener {
char* sl_url;
char* sl_name;
#ifdef HAVE_TLS
int sl_is_tls;
#endif
ber_socket_t sl_sd;
struct sockaddr_in sl_addr;
} Listener;
Listener **slap_listeners = NULL;
#ifdef HAVE_WINSOCK2
/* in nt_main.c */
extern ldap_pvt_thread_cond_t started_event;
/* forward reference */
static void hit_socket(void);
/* In wsa_err.c */
char *WSAGetLastErrorString();
static ldap_pvt_thread_t hit_tid;
#define WAKE_LISTENER(w) \
do {\
if( w ) {\
ldap_pvt_thread_kill( listener_tid, LDAP_SIGUSR1 );\
hit_socket(); \
}\
} while(0)
#else
#define WAKE_LISTENER(w) \
do {\
if( w ) {\
ldap_pvt_thread_kill( listener_tid, LDAP_SIGUSR1 );\
}\
} while(0)
#endif
#ifndef HAVE_WINSOCK
static
#endif
volatile sig_atomic_t slapd_shutdown = 0;
static ldap_pvt_thread_t listener_tid;
static volatile sig_atomic_t slapd_listener = 0;
static struct slap_daemon {
ldap_pvt_thread_mutex_t sd_mutex;
int sd_nactives;
#ifndef HAVE_WINSOCK
/* In winsock, accept() returns values higher than dtblsize
so don't bother with this optimization */
int sd_nfds;
#endif
fd_set sd_actives;
fd_set sd_readers;
fd_set sd_writers;
} slap_daemon;
/*
* Add a descriptor to daemon control
*/
static void slapd_add(ber_socket_t s) {
ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
assert( !FD_ISSET( s, &slap_daemon.sd_actives ));
assert( !FD_ISSET( s, &slap_daemon.sd_readers ));
assert( !FD_ISSET( s, &slap_daemon.sd_writers ));
#ifndef HAVE_WINSOCK
if (s >= slap_daemon.sd_nfds) {
slap_daemon.sd_nfds = s + 1;
}
#endif
FD_SET( s, &slap_daemon.sd_actives );
FD_SET( s, &slap_daemon.sd_readers );
Debug( LDAP_DEBUG_CONNS, "daemon: added %ld%s%s\n",
(long) s,
FD_ISSET(s, &slap_daemon.sd_readers) ? "r" : "",
FD_ISSET(s, &slap_daemon.sd_writers) ? "w" : "" );
ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
}
/*
* Remove the descriptor from daemon control
*/
void slapd_remove(ber_socket_t s, int wake) {
ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
WAKE_LISTENER(wake);
Debug( LDAP_DEBUG_CONNS, "daemon: removing %ld%s%s\n",
(long) s,
FD_ISSET(s, &slap_daemon.sd_readers) ? "r" : "",
FD_ISSET(s, &slap_daemon.sd_writers) ? "w" : "" );
FD_CLR( s, &slap_daemon.sd_actives );
FD_CLR( s, &slap_daemon.sd_readers );
FD_CLR( s, &slap_daemon.sd_writers );
ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
}
void slapd_clr_write(ber_socket_t s, int wake) {
ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
WAKE_LISTENER(wake);
assert( FD_ISSET( s, &slap_daemon.sd_actives) );
FD_CLR( s, &slap_daemon.sd_writers );
ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
if( wake ) {
ldap_pvt_thread_kill( listener_tid, LDAP_SIGUSR1 );
}
}
void slapd_set_write(ber_socket_t s, int wake) {
ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
WAKE_LISTENER(wake);
assert( FD_ISSET( s, &slap_daemon.sd_actives) );
FD_SET( (unsigned) s, &slap_daemon.sd_writers );
ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
if( wake ) {
ldap_pvt_thread_kill( listener_tid, LDAP_SIGUSR1 );
}
}
void slapd_clr_read(ber_socket_t s, int wake) {
ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
WAKE_LISTENER(wake);
assert( FD_ISSET( s, &slap_daemon.sd_actives) );
FD_CLR( s, &slap_daemon.sd_readers );
ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
if( wake ) {
ldap_pvt_thread_kill( listener_tid, LDAP_SIGUSR1 );
}
}
void slapd_set_read(ber_socket_t s, int wake) {
ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
WAKE_LISTENER(wake);
assert( FD_ISSET( s, &slap_daemon.sd_actives) );
FD_SET( s, &slap_daemon.sd_readers );
ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
if( wake ) {
ldap_pvt_thread_kill( listener_tid, LDAP_SIGUSR1 );
}
}
static void slapd_close(ber_socket_t s) {
Debug( LDAP_DEBUG_CONNS, "daemon: closing %ld\n",
(long) s, 0, 0 );
tcp_close(s);
}
Listener *
open_listener(
const char* url,
int port,
int tls_port )
{
int tmp, rc;
Listener l;
Listener *li;
LDAPURLDesc *lud;
char *s;
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 NULL;
}
#ifndef HAVE_TLS
if( lud->lud_ldaps ) {
Debug( LDAP_DEBUG_ANY,
"daemon: TLS not supported (%s)\n",
url, 0, 0 );
ldap_free_urldesc( lud );
return NULL;
}
if(! lud->lud_port ) {
lud->lud_port = port;
}
#else
l.sl_is_tls = lud->lud_ldaps;
if(! lud->lud_port ) {
lud->lud_port = lud->lud_ldaps ? tls_port : port;
}
#endif
port = lud->lud_port;
(void) memset( (void*) &l.sl_addr, '\0', sizeof(l.sl_addr) );
l.sl_addr.sin_family = AF_INET;
l.sl_addr.sin_port = htons( (unsigned short) lud->lud_port );
if( lud->lud_host == NULL || lud->lud_host[0] == '\0'
|| strcmp(lud->lud_host, "*") == 0 )
{
l.sl_addr.sin_addr.s_addr = htonl(INADDR_ANY);
} else {
/* host or address was specified */
if( !inet_aton( lud->lud_host, &l.sl_addr.sin_addr ) ) {
struct hostent *he = gethostbyname( lud->lud_host );
if( he == NULL ) {
Debug( LDAP_DEBUG_ANY, "invalid host (%s) in URL: %s",
lud->lud_host, url, 0);
ldap_free_urldesc( lud );
return NULL;
}
memcpy( &l.sl_addr.sin_addr, he->h_addr,
sizeof( l.sl_addr.sin_addr ) );
}
}
ldap_free_urldesc( lud );
if ( (l.sl_sd = socket( AF_INET, SOCK_STREAM, 0 )) == AC_SOCKET_INVALID ) {
#ifndef HAVE_WINSOCK
int err = errno;
Debug( LDAP_DEBUG_ANY,
"daemon: socket() failed errno %d (%s)\n", err,
err > -1 && err < sys_nerr ? sys_errlist[err] :
"unknown", 0 );
#else
Debug( LDAP_DEBUG_ANY,
"daemon: socket() failed errno %d (%s)\n",
WSAGetLastError(),
WSAGetLastErrorString(), 0 );
#endif
return NULL;
}
#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 );
return NULL;
}
#endif
#ifdef SO_REUSEADDR
/* enable address reuse */
tmp = 1;
if ( setsockopt( l.sl_sd, SOL_SOCKET, SO_REUSEADDR,
(char *) &tmp, sizeof(tmp) ) == -1 )
{
int err = errno;
Debug( LDAP_DEBUG_ANY,
"slapd(%ld): setsockopt(SO_REUSEADDR) failed errno %d (%s)\n",
(long) l.sl_sd, err,
err > -1 && err < sys_nerr
? sys_errlist[err] : "unknown" );
}
#endif
#ifdef SO_KEEPALIVE
/* enable keep alives */
tmp = 1;
if ( setsockopt( l.sl_sd, SOL_SOCKET, SO_KEEPALIVE,
(char *) &tmp, sizeof(tmp) ) == -1 )
{
int err = errno;
Debug( LDAP_DEBUG_ANY,
"slapd(%ld): setsockopt(SO_KEEPALIVE) failed errno %d (%s)\n",
(long) l.sl_sd, err,
err > -1 && err < sys_nerr
? sys_errlist[err] : "unknown" );
}
#endif
#ifdef TCP_NODELAY
/* enable no delay */
tmp = 1;
if ( setsockopt( l.sl_sd, IPPROTO_TCP, TCP_NODELAY,
(char *)&tmp, sizeof(tmp) ) )
{
int err = errno;
Debug( LDAP_DEBUG_ANY,
"slapd(%ld): setsockopt(TCP_NODELAY) failed errno %d (%s)\n",
(long) l.sl_sd, err,
err > -1 && err < sys_nerr
? sys_errlist[err] : "unknown" );
}
#endif
if ( bind( l.sl_sd, (struct sockaddr *) &l.sl_addr, sizeof(l.sl_addr) ) == -1 ) {
int err = errno;
Debug( LDAP_DEBUG_ANY, "daemon: bind(%ld) failed errno %d (%s)\n",
(long) l.sl_sd, err,
err > -1 && err < sys_nerr
? sys_errlist[err] : "unknown" );
tcp_close( l.sl_sd );
return NULL;
}
l.sl_url = ch_strdup( url );
l.sl_name = ch_malloc( sizeof("IP=255.255.255.255:65336") );
s = inet_ntoa( l.sl_addr.sin_addr );
sprintf( l.sl_name, "IP=%s:%d",
s != NULL ? s : "unknown" , port );
li = ch_malloc( sizeof( Listener ) );
*li = l;
Debug( LDAP_DEBUG_TRACE, "daemon: initialized %s\n",
l.sl_url, 0, 0 );
return li;
}
static int sockinit(void);
static int sockdestroy(void);
int slapd_daemon_init(char *urls, int port, int tls_port )
{
int i, rc;
char **u;
#ifndef HAVE_TLS
assert( tls_port == 0 );
#endif
Debug( LDAP_DEBUG_ARGS, "daemon_init: %s (%d/%d)\n",
urls ? urls : "<null>", port, tls_port );
if( rc = sockinit() ) {
return rc;
}
#ifdef HAVE_SYSCONF
dtblsize = sysconf( _SC_OPEN_MAX );
#elif HAVE_GETDTABLESIZE
dtblsize = getdtablesize();
#else
dtblsize = FD_SETSIZE;
#endif
#ifdef FD_SETSIZE
if(dtblsize > FD_SETSIZE) {
dtblsize = FD_SETSIZE;
}
#endif /* !FD_SETSIZE */
FD_ZERO( &slap_daemon.sd_readers );
FD_ZERO( &slap_daemon.sd_writers );
if( urls == NULL ) {
urls = "ldap:///";
}
u = str2charray( urls, " " );
if( u == NULL || u[0] == NULL ) {
Debug( LDAP_DEBUG_ANY, "daemon_init: no urls (%s) provided.\n",
urls, 0, 0 );
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 );
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(i = 0; u[i] != NULL; i++ ) {
slap_listeners[i] = open_listener( u[i], port, tls_port );
if( slap_listeners[i] == NULL ) {
return -1;
}
}
slap_listeners[i] = NULL;
Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners opened.\n",
i, 0, 0 );
charray_free( u );
ldap_pvt_thread_mutex_init( &slap_daemon.sd_mutex );
return !i;
}
slapd_daemon_destroy(void)
{
connections_destroy();
sockdestroy();
return 0;
}
static void *
slapd_daemon_task(
void *ptr
)
{
int l;
time( &starttime );
for ( l = 0; slap_listeners[l] != NULL; l++ ) {
if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID )
continue;
if ( listen( slap_listeners[l]->sl_sd, 5 ) == -1 ) {
int err = errno;
Debug( LDAP_DEBUG_ANY,
"daemon: listen(%s, 5) failed errno %d (%s)\n",
(long) slap_listeners[l]->sl_url, err,
err > -1 && err < sys_nerr
? sys_errlist[err] : "unknown" );
return( (void*)-1 );
}
slapd_add( slap_listeners[l]->sl_sd );
}
#ifdef HAVE_WINSOCK
if ( started_event != NULL ) {
ldap_pvt_thread_cond_signal( &started_event );
}
#endif
/* initialization complete. Here comes the loop. */
while ( !slapd_shutdown ) {
ber_socket_t i;
int ns;
int at;
ber_socket_t nfds;
#define SLAPD_EBADF_LIMIT 10
int ebadf = 0;
#define SLAPD_IDLE_CHECK_LIMIT 4
time_t last_idle_check = slap_get_time();
time_t now;
fd_set readfds;
fd_set writefds;
struct sockaddr_in from;
#if defined(SLAPD_RLOOKUPS) || defined(HAVE_TCPD)
struct hostent *hp;
#endif
struct timeval zero;
struct timeval *tvp;
if( global_idletimeout > 0 && difftime(
last_idle_check+global_idletimeout/SLAPD_IDLE_CHECK_LIMIT,
now ) < 0 )
{
connections_timeout_idle(now);
}
FD_ZERO( &writefds );
FD_ZERO( &readfds );
zero.tv_sec = 0;
zero.tv_usec = 0;
ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
#ifdef FD_SET_MANUAL_COPY
for( s = 0; s < nfds; s++ ) {
if(FD_ISSET( &slap_sd_writers, s )) {
FD_SET( &writefds, s );
}
if(FD_ISSET( &slap_sd_writers, s )) {
FD_SET( &writefds, s );
}
}
#else
memcpy( &readfds, &slap_daemon.sd_readers, sizeof(fd_set) );
memcpy( &writefds, &slap_daemon.sd_writers, sizeof(fd_set) );
#endif
for ( l = 0; slap_listeners[l] != NULL; l++ ) {
if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID )
continue;
FD_SET( slap_listeners[l]->sl_sd, &readfds );
}
#ifndef HAVE_WINSOCK
nfds = slap_daemon.sd_nfds;
#else
nfds = dtblsize;
#endif
ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
ldap_pvt_thread_mutex_lock( &active_threads_mutex );
at = active_threads;
ldap_pvt_thread_mutex_unlock( &active_threads_mutex );
#if defined( HAVE_YIELDING_SELECT ) || defined( NO_THREADS )
tvp = NULL;
#else
tvp = at ? &zero : NULL;
#endif
for ( l = 0; slap_listeners[l] != NULL; l++ ) {
if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID )
continue;
Debug( LDAP_DEBUG_CONNS,
"daemon: select: listen=%d active_threads=%d tvp=%s\n",
slap_listeners[l]->sl_sd, at,
tvp == NULL ? "NULL" : "zero" );
}
switch(ns = select( nfds, &readfds,
#ifdef HAVE_WINSOCK
/* don't pass empty fd_set */
( writefds.fd_count > 0 ? &writefds : NULL ),
#else
&writefds,
#endif
NULL, tvp ))
{
case -1: { /* failure - try again */
#ifdef HAVE_WINSOCK
int err = WSAGetLastError();
#else
int err = errno;
#endif
if( err == EBADF && ++ebadf < SLAPD_EBADF_LIMIT) {
continue;
}
if( err != EINTR ) {
Debug( LDAP_DEBUG_CONNS,
"daemon: select failed (%d): %s\n",
err,
err >= 0 && err < sys_nerr
? sys_errlist[err] : "unknown",
0 );
slapd_shutdown = -1;
}
}
continue;
case 0: /* timeout - let threads run */
ebadf = 0;
Debug( LDAP_DEBUG_CONNS, "daemon: select timeout - yielding\n",
0, 0, 0 );
ldap_pvt_thread_yield();
continue;
default: /* something happened - deal with it */
ebadf = 0;
Debug( LDAP_DEBUG_CONNS, "daemon: activity on %d descriptors\n",
ns, 0, 0 );
/* FALL THRU */
}
for ( l = 0; slap_listeners[l] != NULL; l++ ) {
ber_int_t s;
socklen_t len = sizeof(from);
long id;
char *dnsname;
char *peeraddr;
char peername[sizeof("IP=255.255.255.255:65336")];
if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID )
continue;
if ( !FD_ISSET( slap_listeners[l]->sl_sd, &readfds ) )
continue;
if ( (s = accept( slap_listeners[l]->sl_sd,
(struct sockaddr *) &from, &len )) == AC_SOCKET_INVALID )
{
int err = errno;
Debug( LDAP_DEBUG_ANY,
"daemon: accept(%ld) failed errno %d (%s)\n", err,
(long) slap_listeners[l]->sl_sd,
err >= 0 && err < sys_nerr ?
sys_errlist[err] : "unknown");
continue;
}
#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( !FD_ISSET( s, &slap_daemon.sd_actives) );
assert( !FD_ISSET( s, &slap_daemon.sd_readers) );
assert( !FD_ISSET( s, &slap_daemon.sd_writers) );
ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
#endif
#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);
continue;
}
#endif
Debug( LDAP_DEBUG_CONNS, "daemon: new connection on %ld\n",
(long) s, 0, 0 );
len = sizeof(from);
if ( getpeername( s, (struct sockaddr *) &from, &len ) != 0 ) {
int err = errno;
Debug( LDAP_DEBUG_ANY,
"daemon: getpeername( %ld ) failed: errno=%d (%s)\n",
(long) s, err,
err >= 0 && err < sys_nerr ?
sys_errlist[err] : "unknown" );
slapd_close(s);
continue;
}
peeraddr = inet_ntoa( from.sin_addr );
sprintf( peername, "IP=%s:%d",
peeraddr != NULL ? peeraddr : "unknown",
(unsigned) ntohs( from.sin_port ) );
#if defined(SLAPD_RLOOKUPS) || defined(HAVE_TCPD)
hp = gethostbyaddr( (char *)
&(from.sin_addr.s_addr),
sizeof(from.sin_addr.s_addr), AF_INET );
if(hp) {
dnsname = str2lower( hp->h_name );
} else {
dnsname = NULL;
}
#else
dnsname = NULL;
#endif
#ifdef HAVE_TCPD
if( !hosts_ctl("slapd",
dnsname != NULL ? dnsname : STRING_UNKNOWN,
peeraddr != NULL ? peeraddr : STRING_UNKNOWN,
STRING_UNKNOWN ))
{
/* DENY ACCESS */
Statslog( LDAP_DEBUG_ANY,
"fd=%ld connection from %s (%s) denied.\n",
(long) s,
dnsname != NULL ? dnsname : "unknown",
peeraddr != NULL ? peeraddr : "unknown",
0, 0 );
slapd_close(s);
continue;
}
#endif /* HAVE_TCPD */
if( (id = connection_init(s,
slap_listeners[l]->sl_url,
dnsname != NULL ? dnsname : "unknown",
peername,
slap_listeners[l]->sl_name,
#ifdef HAVE_TLS
slap_listeners[l]->sl_is_tls
#else
0
#endif
)) < 0 )
{
Debug( LDAP_DEBUG_ANY,
"daemon: connection_init(%ld, %s, %s) failed.\n",
(long) s,
peername,
slap_listeners[l]->sl_name );
slapd_close(s);
continue;
}
Statslog( LDAP_DEBUG_STATS,
"daemon: conn=%d fd=%ld connection from %s (%s) accepted.\n",
id, (long) s,
peername,
slap_listeners[l]->sl_name,
0 );
slapd_add( s );
continue;
}
#ifdef LDAP_DEBUG
Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
#ifdef HAVE_WINSOCK
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
for ( i = 0; i < nfds; i++ ) {
int a, r, w;
int is_listener = 0;
for ( l = 0; slap_listeners[l] != NULL; l++ ) {
if ( i == slap_listeners[l]->sl_sd ) {
is_listener = 1;
break;
}
}
if ( is_listener ) {
continue;
}
r = FD_ISSET( i, &readfds );
w = FD_ISSET( i, &writefds );
if ( r || w ) {
Debug( LDAP_DEBUG_CONNS, " %d%s%s", i,
r ? "r" : "", w ? "w" : "" );
}
}
#endif
Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
#endif
/* loop through the writers */
#ifdef HAVE_WINSOCK
for ( i = 0; i < writefds.fd_count; i++ )
#else
for ( i = 0; i < nfds; i++ )
#endif
{
ber_socket_t wd;
int is_listener = 0;
#ifdef HAVE_WINSOCK
wd = writefds.fd_array[i];
#else
if( ! FD_ISSET( i, &writefds ) ) {
continue;
}
wd = i;
#endif
for ( l = 0; slap_listeners[l] != NULL; l++ ) {
if ( i == slap_listeners[l]->sl_sd ) {
is_listener = 1;
break;
}
}
if ( is_listener ) {
continue;
}
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 valid the stream is still
* active.
*/
if ( connection_write( wd ) < 0 ) {
FD_CLR( (unsigned) wd, &readfds );
slapd_close( wd );
}
}
#ifdef HAVE_WINSOCK
for ( i = 0; i < readfds.fd_count; i++ )
#else
for ( i = 0; i < nfds; i++ )
#endif
{
ber_socket_t rd;
int is_listener = 0;
#ifdef HAVE_WINSOCK
rd = readfds.fd_array[i];
#else
if( ! FD_ISSET( i, &readfds ) ) {
continue;
}
rd = i;
#endif
for ( l = 0; slap_listeners[l] != NULL; l++ ) {
if ( rd == slap_listeners[l]->sl_sd ) {
is_listener = 1;
break;
}
}
if ( is_listener ) {
continue;
}
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.
*/
if ( connection_read( rd ) < 0 ) {
slapd_close( rd );
}
}
ldap_pvt_thread_yield();
}
if( slapd_shutdown > 0 ) {
Debug( LDAP_DEBUG_TRACE,
"daemon: shutdown requested and initiated.\n",
0, 0, 0 );
} else if ( slapd_shutdown < 0 ) {
Debug( LDAP_DEBUG_TRACE,
"daemon: abnormal condition, shutdown initiated.\n",
0, 0, 0 );
} else {
Debug( LDAP_DEBUG_TRACE,
"daemon: no active streams, shutdown initiated.\n",
0, 0, 0 );
}
for ( l = 0; slap_listeners[l] != NULL; l++ ) {
if ( slap_listeners[l]->sl_sd != AC_SOCKET_INVALID ) {
slapd_close( slap_listeners[l]->sl_sd );
break;
}
}
ldap_pvt_thread_mutex_lock( &active_threads_mutex );
Debug( LDAP_DEBUG_ANY,
"slapd shutdown: waiting for %d threads to terminate\n",
active_threads, 0, 0 );
while ( active_threads > 0 ) {
ldap_pvt_thread_cond_wait(&active_threads_cond, &active_threads_mutex);
}
ldap_pvt_thread_mutex_unlock( &active_threads_mutex );
return NULL;
}
int slapd_daemon( void )
{
int rc;
connections_init();
#define SLAPD_LISTENER_THREAD 1
#if defined( SLAPD_LISTENER_THREAD ) || !defined(HAVE_PTHREADS)
/* 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
/* expermimental code */
listener_tid = pthread_self();
slapd_daemon_task( NULL );
#endif
return 0;
}
#ifdef HAVE_WINSOCK2
int sockinit(void)
{
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. */
return 0;
}
int sockdestroy(void)
{
WSACleanup();
return 0;
}
void hit_socket(void)
{
ber_socket_t s;
int on = 1;
extern struct sockaddr_in bind_addr;
/* throw something at the socket to terminate the select() in the daemon thread. */
if (( s = socket( AF_INET, SOCK_STREAM, 0 )) == AC_SOCKET_INVALID )
Debug( LDAP_DEBUG_ANY,
"slap_set_shutdown: socket failed\n\tWSAGetLastError=%d (%s)\n",
WSAGetLastError(), WSAGetLastErrorString(), 0 );
if ( ioctlsocket( s, FIONBIO, &on ) == -1 )
Debug( LDAP_DEBUG_ANY,
"slap_set_shutdown:FIONBIO ioctl on %d faled\n\tWSAGetLastError=%d (%s)\n",
s, WSAGetLastError(), WSAGetLastError() );
bind_addr.sin_addr.s_addr = htonl( INADDR_LOOPBACK );
if ( connect( s, (struct sockaddr *)&bind_addr, sizeof( struct sockaddr_in )) == SOCKET_ERROR ) {
Debug( LDAP_DEBUG_ANY,
"hit_socket: error on connect: %d\n",
WSAGetLastError(), 0, 0 );
/* we can probably expect some error to occur here, mostly WSAEWOULDBLOCK */
}
tcp_close(s);
}
#elif HAVE_WINSOCK
static int sockinit(void)
{ WSADATA wsaData;
if ( WSAStartup( 0x0101, &wsaData ) != 0 ) {
return -1;
}
return 0;
}
static int sockdestroy(void)
{
WSACleanup();
return 0;
}
#else
static int sockinit(void)
{
return 0;
}
static int sockdestroy(void)
{
return 0;
}
#endif
void
slap_set_shutdown( int sig )
{
int l;
slapd_shutdown = sig;
#ifndef HAVE_WINSOCK
if(slapd_listener) {
ldap_pvt_thread_kill( listener_tid, LDAP_SIGUSR1 );
}
#else
/* trying to "hit" the socket seems to always get a */
/* EWOULDBLOCK error, so just close the listen socket to */
/* break out of the select since we're shutting down anyway */
for ( l = 0; slap_listeners[l] != NULL; l++ ) {
if ( slap_listeners[l]->sl_sd >= 0 ) {
tcp_close( slap_listeners[l]->sl_sd );
}
}
#endif
/* reinstall self */
(void) SIGNAL( sig, slap_set_shutdown );
}
void
slap_do_nothing( int sig )
{
/* reinstall self */
(void) SIGNAL( sig, slap_do_nothing );
}
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