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openldap/libraries/libldap/os-ip.c
Kurt Zeilenga 1bcec8bf6a Add LBER_ and LDAP_ memory allocators/deallocators for internal 
library use:
  LBER_ macros expand to system routines.
  LDAP_ macros expand to new ber_ allocators.

Add ber_ and ldap_ memory allocators/deallocator:
  ber_ routines are wrappers of LBER_ macros.
  ldap_ routines are wrappers of ber_ routines.

Removed safe_realloc() macro from various files.  This issue
(if an issue) should be resolved across whole package.

ldapmodify.c now uses ber_ allocators to resolve ber_bvfree()
vs. WIN32 multiple heaps issue.

These changes should facilate implementation of
  ber_set_option( NULL, LBER_OPT_MEMORY_FN, ...)
and
  ldap_set_option( NULL, LDAP_OPT_MEMORY_FN, ...).
1999-05-29 01:19:14 +00:00

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/*
* Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*/
/* Portions
* Copyright (c) 1995 Regents of the University of Michigan.
* All rights reserved.
*
* os-ip.c -- platform-specific TCP & UDP related code
*/
#include "portable.h"
#include <stdio.h>
#include <stdlib.h>
#include <ac/errno.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/time.h>
#include <ac/unistd.h>
#ifdef HAVE_IO_H
#include <io.h>
#endif /* HAVE_IO_H */
#if defined( HAVE_SYS_FILIO_H )
#include <sys/filio.h>
#elif defined( HAVE_SYS_IOCTL_H )
#include <sys/ioctl.h>
#endif
#include "ldap-int.h"
int
ldap_connect_to_host( Sockbuf *sb, const char *host, unsigned long address,
int port, int async )
/*
* if host == NULL, connect using address
* "address" and "port" must be in network byte order
* zero is returned upon success, -1 if fatal error, -2 EINPROGRESS
* async is only used ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS (non-0 means don't wait for connect)
* XXX async is not used yet!
*/
{
int rc, i, s = 0;
int connected, use_hp;
struct sockaddr_in sin;
struct hostent *hp = NULL;
#ifdef notyet
ioctl_t status; /* for ioctl call */
#endif /* notyet */
/* buffers for ldap_pvt_gethostbyname_a */
struct hostent he_buf;
int local_h_errno;
char *ha_buf=NULL;
#define DO_RETURN(x) if (ha_buf) LDAP_FREE(ha_buf); return (x);
Debug( LDAP_DEBUG_TRACE, "ldap_connect_to_host: %s:%d\n",
( host == NULL ) ? "(by address)" : host, (int) ntohs( (short) port ), 0 );
connected = use_hp = 0;
if ( host != NULL ) {
address = inet_addr( host );
/* This was just a test for -1 until OSF1 let inet_addr return
unsigned int, which is narrower than 'unsigned long address' */
if ( address == 0xffffffff || address == (unsigned long) -1 ) {
if ( ( ldap_pvt_gethostbyname_a( host, &he_buf, &ha_buf,
&hp, &local_h_errno) < 0) || (hp==NULL))
{
#ifdef HAVE_WINSOCK
errno = WSAGetLastError();
#else
errno = EHOSTUNREACH; /* not exactly right, but... */
#endif
DO_RETURN( -1 );
}
use_hp = 1;
}
}
rc = -1;
for ( i = 0; !use_hp || ( hp->h_addr_list[ i ] != 0 ); i++ ) {
if (( s = socket( AF_INET, SOCK_STREAM, 0 )) < 0 ) {
DO_RETURN( -1 );
}
#ifdef notyet
status = 1;
if ( async && ioctl( s, FIONBIO, (caddr_t)&status ) == -1 ) {
Debug( LDAP_DEBUG_ANY, "FIONBIO ioctl failed on %d\n",
s, 0, 0 );
}
#endif /* notyet */
(void)memset( (char *)&sin, 0, sizeof( struct sockaddr_in ));
sin.sin_family = AF_INET;
sin.sin_port = port;
SAFEMEMCPY( (char *) &sin.sin_addr.s_addr,
( use_hp ? (char *) hp->h_addr_list[ i ] :
(char *) &address ), sizeof( sin.sin_addr.s_addr) );
if ( connect( s, (struct sockaddr *)&sin,
sizeof( struct sockaddr_in )) >= 0 ) {
connected = 1;
rc = 0;
break;
} else {
#ifdef HAVE_WINSOCK
errno = WSAGetLastError();
#endif
#ifdef notyet
#ifdef EAGAIN
if ( errno == EINPROGRESS || errno == EAGAIN ) {
#else /* EAGAIN */
if ( errno == EINPROGRESS ) {
#endif /* EAGAIN */
Debug( LDAP_DEBUG_TRACE,
"connect would block...\n", 0, 0, 0 );
rc = -2;
break;
}
#endif /* notyet */
#ifdef LDAP_DEBUG
if ( ldap_debug & LDAP_DEBUG_TRACE ) {
perror( (char *)inet_ntoa( sin.sin_addr ));
}
#endif
tcp_close( s );
if ( !use_hp ) {
break;
}
}
}
ber_pvt_sb_set_desc( sb, s );
if ( connected ) {
#ifdef notyet
status = 0;
if ( !async && ioctl( s, FIONBIO, (caddr_t)&on ) == -1 ) {
Debug( LDAP_DEBUG_ANY, "FIONBIO ioctl failed on %d\n",
s, 0, 0 );
}
#endif /* notyet */
Debug( LDAP_DEBUG_TRACE, "sd %d connected to: %s\n",
s, (char *) inet_ntoa( sin.sin_addr ), 0 );
}
DO_RETURN( rc );
}
#undef DO_RETURN
void
ldap_close_connection( Sockbuf *sb )
{
ber_pvt_sb_close( sb );
}
#if defined( HAVE_KERBEROS ) || defined( HAVE_TLS )
char *
ldap_host_connected_to( Sockbuf *sb )
{
struct hostent *hp;
char *p;
int len;
struct sockaddr_in sin;
/* buffers for gethostbyaddr_r */
struct hostent he_buf;
int local_h_errno;
char *ha_buf=NULL;
#define DO_RETURN(x) if (ha_buf) LDAP_FREE(ha_buf); return (x);
(void)memset( (char *)&sin, 0, sizeof( struct sockaddr_in ));
len = sizeof( sin );
if ( getpeername( ber_pvt_sb_get_desc(sb), (struct sockaddr *)&sin, &len ) == -1 ) {
return( NULL );
}
/*
* do a reverse lookup on the addr to get the official hostname.
* this is necessary for kerberos to work right, since the official
* hostname is used as the kerberos instance.
*/
if ((ldap_pvt_gethostbyaddr_a( (char *) &sin.sin_addr,
sizeof( sin.sin_addr ),
AF_INET, &he_buf, &ha_buf,
&hp,&local_h_errno ) ==0 ) && (hp != NULL) )
{
if ( hp->h_name != NULL ) {
char *host = strdup( hp->h_name );
DO_RETURN( host );
}
}
DO_RETURN( NULL );
}
#undef DO_RETURN
#endif /* HAVE_KERBEROS || HAVE_TLS */
/* for UNIX */
struct selectinfo {
fd_set si_readfds;
fd_set si_writefds;
fd_set si_use_readfds;
fd_set si_use_writefds;
};
void
ldap_mark_select_write( LDAP *ld, Sockbuf *sb )
{
struct selectinfo *sip;
sip = (struct selectinfo *)ld->ld_selectinfo;
if ( !FD_ISSET( ber_pvt_sb_get_desc(sb), &sip->si_writefds )) {
FD_SET( (u_int) sb->sb_sd, &sip->si_writefds );
}
}
void
ldap_mark_select_read( LDAP *ld, Sockbuf *sb )
{
struct selectinfo *sip;
sip = (struct selectinfo *)ld->ld_selectinfo;
if ( !FD_ISSET( ber_pvt_sb_get_desc(sb), &sip->si_readfds )) {
FD_SET( (u_int) sb->sb_sd, &sip->si_readfds );
}
}
void
ldap_mark_select_clear( LDAP *ld, Sockbuf *sb )
{
struct selectinfo *sip;
sip = (struct selectinfo *)ld->ld_selectinfo;
FD_CLR( (u_int) ber_pvt_sb_get_desc(sb), &sip->si_writefds );
FD_CLR( (u_int) ber_pvt_sb_get_desc(sb), &sip->si_readfds );
}
int
ldap_is_write_ready( LDAP *ld, Sockbuf *sb )
{
struct selectinfo *sip;
sip = (struct selectinfo *)ld->ld_selectinfo;
return( FD_ISSET( ber_pvt_sb_get_desc(sb), &sip->si_use_writefds ));
}
int
ldap_is_read_ready( LDAP *ld, Sockbuf *sb )
{
struct selectinfo *sip;
sip = (struct selectinfo *)ld->ld_selectinfo;
return( FD_ISSET( ber_pvt_sb_get_desc(sb), &sip->si_use_readfds ));
}
void *
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 );
}
return( (void *)sip );
}
void
ldap_free_select_info( void *sip )
{
LDAP_FREE( sip );
}
int
do_ldap_select( LDAP *ld, struct timeval *timeout )
{
struct selectinfo *sip;
static int tblsize;
Debug( LDAP_DEBUG_TRACE, "do_ldap_select\n", 0, 0, 0 );
if ( tblsize == 0 ) {
#if defined( HAVE_SYSCONF )
tblsize = sysconf( _SC_OPEN_MAX );
#elif defined( HAVE_GETDTABLESIZE )
tblsize = getdtablesize();
#else
tblsize = FD_SETSIZE;
#endif /* !USE_SYSCONF */
#ifdef FD_SETSIZE
if( tblsize > FD_SETSIZE ) {
tblsize = FD_SETSIZE;
}
#endif /* FD_SETSIZE*/
}
sip = (struct selectinfo *)ld->ld_selectinfo;
sip->si_use_readfds = sip->si_readfds;
sip->si_use_writefds = sip->si_writefds;
return( select( tblsize, &sip->si_use_readfds, &sip->si_use_writefds,
NULL, timeout ));
}
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