X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=libraries%2Flibldap%2Fos-ip.c;h=4b7de9e690f362c5b72c7c56b3a777f6d315e48a;hb=de01a6e3d791d3458549d2ceeccf4d7e0477ff78;hp=0e16cd7d8c53f8f19fc951491a050368ccc6c6e9;hpb=159de0f1359459371c590ac770cc30edbade58d5;p=openldap
diff --git a/libraries/libldap/os-ip.c b/libraries/libldap/os-ip.c
index 0e16cd7d8c..4b7de9e690 100644
--- a/libraries/libldap/os-ip.c
+++ b/libraries/libldap/os-ip.c
@@ -2,7 +2,8 @@
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software .
*
- * Copyright 1998-2003 The OpenLDAP Foundation.
+ * Copyright 1998-2007 The OpenLDAP Foundation.
+ * Portions Copyright 1999 Lars Uffmann.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -16,6 +17,9 @@
/* Portions Copyright (c) 1995 Regents of the University of Michigan.
* All rights reserved.
*/
+/* Significant additional contributors include:
+ * Lars Uffman
+ */
#include "portable.h"
@@ -35,8 +39,6 @@
#include "ldap-int.h"
-int ldap_int_tblsize = 0;
-
#if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
# ifdef LDAP_PF_INET6
int ldap_int_inet4or6 = AF_UNSPEC;
@@ -45,20 +47,6 @@ int ldap_int_inet4or6 = AF_INET;
# endif
#endif
-/*
- * nonblock connect code
- * written by Lars Uffmann, .
- *
- * Copyright 1999, Lars Uffmann, All rights reserved.
- * This software is not subject to any license of my employer
- * mediaWays GmbH.
- *
- * OpenLDAP COPYING RESTRICTIONS APPLY, see COPYRIGHT file
- *
- * Read about the rationale in ldap_connect_timeout:
- * ftp://koobera.math.uic.edu/www/docs/connect.html.
- */
-
#ifdef LDAP_DEBUG
#define osip_debug(ld,fmt,arg1,arg2,arg3) \
@@ -75,7 +63,7 @@ do { \
static void
ldap_pvt_set_errno(int err)
{
- errno = err;
+ sock_errset(err);
}
int
@@ -135,20 +123,31 @@ ldap_pvt_close_socket(LDAP *ld, int s)
static int
ldap_int_prepare_socket(LDAP *ld, int s, int proto )
{
- osip_debug(ld, "ldap_prepare_socket: %d\n", s,0,0);
+ osip_debug( ld, "ldap_prepare_socket: %d\n", s, 0, 0 );
-#ifdef TCP_NODELAY
- if( proto == LDAP_PROTO_TCP ) {
+#if defined( SO_KEEPALIVE ) || defined( TCP_NODELAY )
+ if ( proto == LDAP_PROTO_TCP ) {
int dummy = 1;
+#ifdef SO_KEEPALIVE
+ if ( setsockopt( s, SOL_SOCKET, SO_KEEPALIVE,
+ (char*) &dummy, sizeof(dummy) ) == AC_SOCKET_ERROR )
+ {
+ osip_debug( ld, "ldap_prepare_socket: "
+ "setsockopt(%d, SO_KEEPALIVE) failed (ignored).\n",
+ s, 0, 0 );
+ }
+#endif /* SO_KEEPALIVE */
+#ifdef TCP_NODELAY
if ( setsockopt( s, IPPROTO_TCP, TCP_NODELAY,
(char*) &dummy, sizeof(dummy) ) == AC_SOCKET_ERROR )
{
- osip_debug(ld, "ldap_prepare_socket: "
+ osip_debug( ld, "ldap_prepare_socket: "
"setsockopt(%d, TCP_NODELAY) failed (ignored).\n",
- s, 0, 0);
+ s, 0, 0 );
}
+#endif /* TCP_NODELAY */
}
-#endif
+#endif /* SO_KEEPALIVE || TCP_NODELAY */
return 0;
}
@@ -215,17 +214,147 @@ ldap_pvt_is_socket_ready(LDAP *ld, int s)
#endif /* HAVE_WINSOCK */
+/* NOTE: this is identical to analogous code in os-local.c */
+int
+ldap_int_poll(
+ LDAP *ld,
+ ber_socket_t s,
+ struct timeval *tvp )
+{
+ int rc;
+
+
+ osip_debug(ld, "ldap_int_poll: fd: %d tm: %ld\n",
+ s, tvp ? tvp->tv_sec : -1L, 0);
+
+#ifdef HAVE_POLL
+ {
+ struct pollfd fd;
+ int timeout = INFTIM;
+
+ fd.fd = s;
+ fd.events = POLL_WRITE;
+
+ if ( tvp != NULL ) {
+ timeout = TV2MILLISEC( tvp );
+ }
+ do {
+ fd.revents = 0;
+ rc = poll( &fd, 1, timeout );
+
+ } while ( rc == AC_SOCKET_ERROR && errno == EINTR &&
+ LDAP_BOOL_GET( &ld->ld_options, LDAP_BOOL_RESTART ) );
+
+ if ( rc == AC_SOCKET_ERROR ) {
+ return rc;
+ }
+
+ if ( timeout == 0 && rc == 0 ) {
+ return -2;
+ }
+
+ if ( fd.revents & POLL_WRITE ) {
+ if ( ldap_pvt_is_socket_ready( ld, s ) == -1 ) {
+ return -1;
+ }
+
+ if ( ldap_pvt_ndelay_off( ld, s ) == -1 ) {
+ return -1;
+ }
+ return 0;
+ }
+ }
+#else
+ {
+ fd_set wfds, *z = NULL;
+#ifdef HAVE_WINSOCK
+ fd_set efds;
+#endif
+ struct timeval tv = { 0 };
+
+#if defined( FD_SETSIZE ) && !defined( HAVE_WINSOCK )
+ if ( s >= FD_SETSIZE ) {
+ rc = AC_SOCKET_ERROR;
+ tcp_close( s );
+ ldap_pvt_set_errno( EMFILE );
+ return rc;
+ }
+#endif
+
+ if ( tvp != NULL ) {
+ tv = *tvp;
+ }
+
+ do {
+ FD_ZERO(&wfds);
+ FD_SET(s, &wfds );
+
+#ifdef HAVE_WINSOCK
+ FD_ZERO(&efds);
+ FD_SET(s, &efds );
+#endif
+
+ rc = select( ldap_int_tblsize, z, &wfds,
+#ifdef HAVE_WINSOCK
+ &efds,
+#else
+ z,
+#endif
+ tvp ? &tv : NULL );
+ } while ( rc == AC_SOCKET_ERROR && errno == EINTR &&
+ LDAP_BOOL_GET( &ld->ld_options, LDAP_BOOL_RESTART ) );
+
+ if ( rc == AC_SOCKET_ERROR ) {
+ return rc;
+ }
+
+ if ( rc == 0 && tvp && tvp->tv_sec == 0 && tvp->tv_usec == 0 ) {
+ return -2;
+ }
+
+#ifdef HAVE_WINSOCK
+ /* This means the connection failed */
+ if ( FD_ISSET(s, &efds) ) {
+ int so_errno;
+ int dummy = sizeof(so_errno);
+ if ( getsockopt( s, SOL_SOCKET, SO_ERROR,
+ (char *) &so_errno, &dummy ) == AC_SOCKET_ERROR || !so_errno )
+ {
+ /* impossible */
+ so_errno = WSAGetLastError();
+ }
+ ldap_pvt_set_errno( so_errno );
+ osip_debug(ld, "ldap_int_poll: error on socket %d: "
+ "errno: %d (%s)\n", s, errno, sock_errstr( errno ));
+ return -1;
+ }
+#endif
+ if ( FD_ISSET(s, &wfds) ) {
+#ifndef HAVE_WINSOCK
+ if ( ldap_pvt_is_socket_ready( ld, s ) == -1 ) {
+ return -1;
+ }
+#endif
+ if ( ldap_pvt_ndelay_off(ld, s) == -1 ) {
+ return -1;
+ }
+ return 0;
+ }
+ }
+#endif
+
+ osip_debug(ld, "ldap_int_poll: timed out\n",0,0,0);
+ ldap_pvt_set_errno( ETIMEDOUT );
+ return -1;
+}
+
static int
ldap_pvt_connect(LDAP *ld, ber_socket_t s,
struct sockaddr *sin, socklen_t addrlen,
int async)
{
- int rc;
- struct timeval tv, *opt_tv=NULL;
- fd_set wfds, *z=NULL;
-#ifdef HAVE_WINSOCK
- fd_set efds;
-#endif
+ int rc, err;
+ struct timeval tv, *opt_tv = NULL;
#ifdef LDAP_CONNECTIONLESS
/* We could do a connect() but that would interfere with
@@ -239,85 +368,38 @@ ldap_pvt_connect(LDAP *ld, ber_socket_t s,
return ( 0 );
}
#endif
- if ( (opt_tv = ld->ld_options.ldo_tm_net) != NULL ) {
- tv.tv_usec = opt_tv->tv_usec;
- tv.tv_sec = opt_tv->tv_sec;
+ if ( ld->ld_options.ldo_tm_net.tv_sec >= 0 ) {
+ tv = ld->ld_options.ldo_tm_net;
+ opt_tv = &tv;
}
- osip_debug(ld, "ldap_connect_timeout: fd: %d tm: %ld async: %d\n",
+ osip_debug(ld, "ldap_pvt_connect: fd: %d tm: %ld async: %d\n",
s, opt_tv ? tv.tv_sec : -1L, async);
- if ( ldap_pvt_ndelay_on(ld, s) == -1 )
+ if ( opt_tv && ldap_pvt_ndelay_on(ld, s) == -1 )
return ( -1 );
if ( connect(s, sin, addrlen) != AC_SOCKET_ERROR ) {
- if ( ldap_pvt_ndelay_off(ld, s) == -1 )
+ if ( opt_tv && ldap_pvt_ndelay_off(ld, s) == -1 )
return ( -1 );
return ( 0 );
}
-#ifdef HAVE_WINSOCK
- ldap_pvt_set_errno( WSAGetLastError() );
-#endif
-
- if ( errno != EINPROGRESS && errno != EWOULDBLOCK ) {
+ err = sock_errno();
+ if ( err != EINPROGRESS && err != EWOULDBLOCK ) {
return ( -1 );
}
-#ifdef notyet
- if ( async ) return ( -2 );
-#endif
-
- FD_ZERO(&wfds);
- FD_SET(s, &wfds );
-
-#ifdef HAVE_WINSOCK
- FD_ZERO(&efds);
- FD_SET(s, &efds );
-#endif
+ if ( async ) {
+ /* caller will call ldap_int_poll() as appropriate? */
+ return ( -2 );
+ }
- do {
- rc = select(ldap_int_tblsize, z, &wfds,
-#ifdef HAVE_WINSOCK
- &efds,
-#else
- z,
-#endif
- opt_tv ? &tv : NULL);
- } while( rc == AC_SOCKET_ERROR && errno == EINTR &&
- LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_RESTART ));
+ rc = ldap_int_poll( ld, s, opt_tv );
- if( rc == AC_SOCKET_ERROR ) return rc;
+ osip_debug(ld, "ldap_pvt_connect: %d\n", rc, 0, 0);
-#ifdef HAVE_WINSOCK
- /* This means the connection failed */
- if ( FD_ISSET(s, &efds) ) {
- int so_errno;
- int dummy = sizeof(so_errno);
- if ( getsockopt( s, SOL_SOCKET, SO_ERROR,
- (char *) &so_errno, &dummy ) == AC_SOCKET_ERROR || !so_errno )
- {
- /* impossible */
- so_errno = WSAGetLastError();
- }
- ldap_pvt_set_errno(so_errno);
- osip_debug(ld, "ldap_pvt_connect: error on socket %d: "
- "errno: %d (%s)\n", s, errno, sock_errstr(errno));
- return -1;
- }
-#endif
- if ( FD_ISSET(s, &wfds) ) {
-#ifndef HAVE_WINSOCK
- if ( ldap_pvt_is_socket_ready(ld, s) == -1 )
- return ( -1 );
-#endif
- if ( ldap_pvt_ndelay_off(ld, s) == -1 )
- return ( -1 );
- return ( 0 );
- }
- osip_debug(ld, "ldap_connect_timeout: timed out\n",0,0,0);
- ldap_pvt_set_errno( ETIMEDOUT );
- return ( -1 );
+ return rc;
}
#ifndef HAVE_INET_ATON
@@ -325,11 +407,14 @@ int
ldap_pvt_inet_aton( const char *host, struct in_addr *in)
{
unsigned long u = inet_addr( host );
- if ( u != 0xffffffff || u != (unsigned long) -1 ) {
- in->s_addr = u;
- return 1;
- }
- return 0;
+
+#ifdef INADDR_NONE
+ if ( u == INADDR_NONE ) return 0;
+#endif
+ if ( u == 0xffffffffUL || u == (unsigned long) -1L ) return 0;
+
+ in->s_addr = u;
+ return 1;
}
#endif
@@ -378,9 +463,10 @@ ldap_connect_to_host(LDAP *ld, Sockbuf *sb,
#if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
memset( &hints, '\0', sizeof(hints) );
-#ifdef AI_ADDRCONFIG
- hints.ai_flags = AI_ADDRCONFIG;
-#endif
+#ifdef USE_AI_ATTRCONFIG /* FIXME: configure test needed */
+ /* Use AI_ATTRCONFIG only on systems where its known to be needed. */
+ hints.ai_flags = AI_ATTRCONFIG;
+#endif
hints.ai_family = ldap_int_inet4or6;
hints.ai_socktype = socktype;
snprintf(serv, sizeof serv, "%d", port );
@@ -444,7 +530,7 @@ ldap_connect_to_host(LDAP *ld, Sockbuf *sb,
rc = ldap_pvt_connect( ld, s,
sai->ai_addr, sai->ai_addrlen, async );
- if ( (rc == 0) || (rc == -2) ) {
+ if ( rc == 0 || rc == -2 ) {
ber_sockbuf_ctrl( sb, LBER_SB_OPT_SET_FD, &s );
break;
}
@@ -499,8 +585,18 @@ ldap_connect_to_host(LDAP *ld, Sockbuf *sb,
sizeof(sin.sin_addr) );
}
+#ifdef HAVE_INET_NTOA_B
+ {
+ /* for VxWorks */
+ char address[INET_ADDR_LEN];
+ inet_ntoa_b(sin.sin_address, address);
+ osip_debug(ld, "ldap_connect_to_host: Trying %s:%d\n",
+ address, port, 0);
+ }
+#else
osip_debug(ld, "ldap_connect_to_host: Trying %s:%d\n",
inet_ntoa(sin.sin_addr), port, 0);
+#endif
rc = ldap_pvt_connect(ld, s,
(struct sockaddr *)&sin, sizeof(sin),
@@ -521,8 +617,7 @@ ldap_connect_to_host(LDAP *ld, Sockbuf *sb,
return rc;
}
-#if defined( LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND ) || \
- defined( HAVE_CYRUS_SASL )
+#if defined( HAVE_CYRUS_SASL )
char *
ldap_host_connected_to( Sockbuf *sb, const char *host )
{
@@ -533,7 +628,6 @@ ldap_host_connected_to( Sockbuf *sb, const char *host )
struct sockaddr sabuf;
#endif
struct sockaddr *sa = (struct sockaddr *) &sabuf;
- int rc;
ber_socket_t sd;
(void)memset( (char *)sa, '\0', sizeof sabuf );
@@ -595,10 +689,15 @@ ldap_host_connected_to( Sockbuf *sb, const char *host )
break;
}
-#if 0
{
char *herr;
+#ifdef NI_MAXHOST
char hbuf[NI_MAXHOST];
+#elif defined( MAXHOSTNAMELEN
+ char hbuf[MAXHOSTNAMELEN];
+#else
+ char hbuf[256];
+#endif
hbuf[0] = 0;
if (ldap_pvt_get_hname( sa, len, hbuf, sizeof(hbuf), &herr ) == 0
@@ -607,22 +706,26 @@ ldap_host_connected_to( Sockbuf *sb, const char *host )
return LDAP_STRDUP( hbuf );
}
}
-#endif
return host ? LDAP_STRDUP( host ) : NULL;
}
#endif
-/* for UNIX */
struct selectinfo {
+#ifdef HAVE_POLL
+ /* for UNIX poll(2) */
+ int si_maxfd;
+ struct pollfd si_fds[FD_SETSIZE];
+#else
+ /* for UNIX select(2) */
fd_set si_readfds;
fd_set si_writefds;
fd_set si_use_readfds;
fd_set si_use_writefds;
+#endif
};
-
void
ldap_mark_select_write( LDAP *ld, Sockbuf *sb )
{
@@ -632,9 +735,39 @@ ldap_mark_select_write( LDAP *ld, Sockbuf *sb )
sip = (struct selectinfo *)ld->ld_selectinfo;
ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
+
+#ifdef HAVE_POLL
+ /* for UNIX poll(2) */
+ {
+ int empty=-1;
+ int i;
+ for(i=0; i < sip->si_maxfd; i++) {
+ if( sip->si_fds[i].fd == sd ) {
+ sip->si_fds[i].events |= POLL_WRITE;
+ return;
+ }
+ if( empty==-1 && sip->si_fds[i].fd == -1 ) {
+ empty=i;
+ }
+ }
+
+ if( empty == -1 ) {
+ if( sip->si_maxfd >= FD_SETSIZE ) {
+ /* FIXME */
+ return;
+ }
+ empty = sip->si_maxfd++;
+ }
+
+ sip->si_fds[empty].fd = sd;
+ sip->si_fds[empty].events = POLL_WRITE;
+ }
+#else
+ /* for UNIX select(2) */
if ( !FD_ISSET( sd, &sip->si_writefds )) {
FD_SET( sd, &sip->si_writefds );
}
+#endif
}
@@ -647,9 +780,39 @@ ldap_mark_select_read( LDAP *ld, Sockbuf *sb )
sip = (struct selectinfo *)ld->ld_selectinfo;
ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
+
+#ifdef HAVE_POLL
+ /* for UNIX poll(2) */
+ {
+ int empty=-1;
+ int i;
+ for(i=0; i < sip->si_maxfd; i++) {
+ if( sip->si_fds[i].fd == sd ) {
+ sip->si_fds[i].events |= POLL_READ;
+ return;
+ }
+ if( empty==-1 && sip->si_fds[i].fd == -1 ) {
+ empty=i;
+ }
+ }
+
+ if( empty == -1 ) {
+ if( sip->si_maxfd >= FD_SETSIZE ) {
+ /* FIXME */
+ return;
+ }
+ empty = sip->si_maxfd++;
+ }
+
+ sip->si_fds[empty].fd = sd;
+ sip->si_fds[empty].events = POLL_READ;
+ }
+#else
+ /* for UNIX select(2) */
if ( !FD_ISSET( sd, &sip->si_readfds )) {
FD_SET( sd, &sip->si_readfds );
}
+#endif
}
@@ -662,8 +825,22 @@ ldap_mark_select_clear( LDAP *ld, Sockbuf *sb )
sip = (struct selectinfo *)ld->ld_selectinfo;
ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
+
+#ifdef HAVE_POLL
+ /* for UNIX poll(2) */
+ {
+ int i;
+ for(i=0; i < sip->si_maxfd; i++) {
+ if( sip->si_fds[i].fd == sd ) {
+ sip->si_fds[i].fd = -1;
+ }
+ }
+ }
+#else
+ /* for UNIX select(2) */
FD_CLR( sd, &sip->si_writefds );
FD_CLR( sd, &sip->si_readfds );
+#endif
}
@@ -676,7 +853,23 @@ ldap_is_write_ready( LDAP *ld, Sockbuf *sb )
sip = (struct selectinfo *)ld->ld_selectinfo;
ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
+
+#ifdef HAVE_POLL
+ /* for UNIX poll(2) */
+ {
+ int i;
+ for(i=0; i < sip->si_maxfd; i++) {
+ if( sip->si_fds[i].fd == sd ) {
+ return sip->si_fds[i].revents & POLL_WRITE;
+ }
+ }
+
+ return 0;
+ }
+#else
+ /* for UNIX select(2) */
return( FD_ISSET( sd, &sip->si_use_writefds ));
+#endif
}
@@ -689,7 +882,23 @@ ldap_is_read_ready( LDAP *ld, Sockbuf *sb )
sip = (struct selectinfo *)ld->ld_selectinfo;
ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
+
+#ifdef HAVE_POLL
+ /* for UNIX poll(2) */
+ {
+ int i;
+ for(i=0; i < sip->si_maxfd; i++) {
+ if( sip->si_fds[i].fd == sd ) {
+ return sip->si_fds[i].revents & POLL_READ;
+ }
+ }
+
+ return 0;
+ }
+#else
+ /* for UNIX select(2) */
return( FD_ISSET( sd, &sip->si_use_readfds ));
+#endif
}
@@ -698,11 +907,18 @@ ldap_new_select_info( void )
{
struct selectinfo *sip;
- if (( sip = (struct selectinfo *)LDAP_CALLOC( 1,
- sizeof( struct selectinfo ))) != NULL ) {
- FD_ZERO( &sip->si_readfds );
- FD_ZERO( &sip->si_writefds );
- }
+ sip = (struct selectinfo *)LDAP_CALLOC( 1, sizeof( struct selectinfo ));
+
+ if ( sip == NULL ) return NULL;
+
+#ifdef HAVE_POLL
+ /* for UNIX poll(2) */
+ /* sip->si_maxfd=0 */
+#else
+ /* for UNIX select(2) */
+ FD_ZERO( &sip->si_readfds );
+ FD_ZERO( &sip->si_writefds );
+#endif
return( (void *)sip );
}
@@ -715,45 +931,59 @@ ldap_free_select_info( void *sip )
}
+#ifndef HAVE_POLL
+int ldap_int_tblsize = 0;
+
void
ldap_int_ip_init( void )
{
- int tblsize;
#if defined( HAVE_SYSCONF )
- tblsize = sysconf( _SC_OPEN_MAX );
+ long tblsize = sysconf( _SC_OPEN_MAX );
+ if( tblsize > INT_MAX ) tblsize = INT_MAX;
+
#elif defined( HAVE_GETDTABLESIZE )
- tblsize = getdtablesize();
+ int tblsize = getdtablesize();
#else
- tblsize = FD_SETSIZE;
+ int tblsize = FD_SETSIZE;
#endif /* !USE_SYSCONF */
#ifdef FD_SETSIZE
- if( tblsize > FD_SETSIZE )
- tblsize = FD_SETSIZE;
-#endif /* FD_SETSIZE*/
+ if( tblsize > FD_SETSIZE ) tblsize = FD_SETSIZE;
+#endif /* FD_SETSIZE */
+
ldap_int_tblsize = tblsize;
}
+#endif
int
ldap_int_select( LDAP *ld, struct timeval *timeout )
{
+ int rc;
struct selectinfo *sip;
-#ifdef NEW_LOGGING
- LDAP_LOG ( CONNECTION, ENTRY, "ldap_int_select\n", 0, 0, 0 );
-#else
Debug( LDAP_DEBUG_TRACE, "ldap_int_select\n", 0, 0, 0 );
-#endif
- if ( ldap_int_tblsize == 0 )
- ldap_int_ip_init();
+#ifndef HAVE_POLL
+ if ( ldap_int_tblsize == 0 ) ldap_int_ip_init();
+#endif
sip = (struct selectinfo *)ld->ld_selectinfo;
+ assert( sip != NULL );
+
+#ifdef HAVE_POLL
+ {
+ int to = timeout ? TV2MILLISEC( timeout ) : INFTIM;
+ rc = poll( sip->si_fds, sip->si_maxfd, to );
+ }
+#else
sip->si_use_readfds = sip->si_readfds;
sip->si_use_writefds = sip->si_writefds;
- return( select( ldap_int_tblsize,
- &sip->si_use_readfds, &sip->si_use_writefds,
- NULL, timeout ));
+ rc = select( ldap_int_tblsize,
+ &sip->si_use_readfds, &sip->si_use_writefds,
+ NULL, timeout );
+#endif
+
+ return rc;
}