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RetroZilla/directory/c-sdk/ldap/libraries/libldap/os-ip.c
Ryan Nematz 2f2ae146c0 first commit
2015-10-20 23:03:22 -04:00

1838 lines
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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code, released
* March 31, 1998.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998-1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
* Copyright (c) 1995 Regents of the University of Michigan.
* All rights reserved.
*/
/*
* os-ip.c -- platform-specific TCP & UDP related code
*/
#if 0
#ifndef lint
static char copyright[] = "@(#) Copyright (c) 1995 Regents of the University of Michigan.\nAll rights reserved.\n";
#endif
#endif
/*
* On platforms where poll() does not exist, we use select().
* Therefore, we should increase the number of file descriptors
* we can use by #defining FD_SETSIZE to a large number before
* we include <sys/select.h> or its equivalent. We do not need
* to do this for Windows, because on that platform there is no
* relationship between FD_SETSIZE and the highest numbered file
* descriptor we can use. See the document fdsetsize.txt in
* this directory for a description of the setting of FD_SETSIZE
* for the OS'es we care about.
*/
#ifndef NSLDAPI_HAVE_POLL
/* XXX value for BSDI? */
/* XXX value for macintosh (if applicable)? */
#endif
#include "ldap-int.h"
#ifdef LDAP_CONNECT_MUST_NOT_BE_INTERRUPTED
#include <signal.h>
#endif
#ifdef NSLDAPI_HAVE_POLL
#include <poll.h>
#endif
#ifdef _WINDOWS
#define NSLDAPI_INVALID_OS_SOCKET( s ) ((s) == INVALID_SOCKET)
#else
#define NSLDAPI_INVALID_OS_SOCKET( s ) ((s) < 0 )
#endif
#define NSLDAPI_POLL_ARRAY_GROWTH 5 /* grow arrays 5 elements at a time */
/*
* Structures and union for tracking status of network sockets
*/
#ifdef NSLDAPI_HAVE_POLL
struct nsldapi_os_statusinfo { /* used with native OS poll() */
struct pollfd *ossi_pollfds;
int ossi_pollfds_size;
};
#else /* NSLDAPI_HAVE_POLL */
struct nsldapi_os_statusinfo { /* used with native OS select() */
fd_set ossi_readfds;
fd_set ossi_writefds;
fd_set ossi_use_readfds;
fd_set ossi_use_writefds;
};
#endif /* else NSLDAPI_HAVE_POLL */
struct nsldapi_cb_statusinfo { /* used with ext. I/O poll() callback */
LDAP_X_PollFD *cbsi_pollfds;
int cbsi_pollfds_size;
};
/*
* NSLDAPI_CB_POLL_MATCH() evaluates to non-zero (true) if the Sockbuf *sdp
* matches the LDAP_X_PollFD pollfd.
*/
#ifdef _WINDOWS
#define NSLDAPI_CB_POLL_SD_CAST (unsigned int)
#else
#define NSLDAPI_CB_POLL_SD_CAST
#endif
#define NSLDAPI_CB_POLL_MATCH( sbp, pollfd ) \
((sbp)->sb_sd == NSLDAPI_CB_POLL_SD_CAST ((pollfd).lpoll_fd) && \
(sbp)->sb_ext_io_fns.lbextiofn_socket_arg == (pollfd).lpoll_socketarg)
struct nsldapi_iostatus_info {
int ios_type;
#define NSLDAPI_IOSTATUS_TYPE_OSNATIVE 1 /* poll() or select() */
#define NSLDAPI_IOSTATUS_TYPE_CALLBACK 2 /* poll()-like */
int ios_read_count;
int ios_write_count;
union {
struct nsldapi_os_statusinfo ios_osinfo;
struct nsldapi_cb_statusinfo ios_cbinfo;
} ios_status;
};
#ifndef NSLDAPI_AVOID_OS_SOCKETS
#ifdef NSLDAPI_HAVE_POLL
static int nsldapi_add_to_os_pollfds( int fd,
struct nsldapi_os_statusinfo *pip, short events );
static int nsldapi_clear_from_os_pollfds( int fd,
struct nsldapi_os_statusinfo *pip, short events );
static int nsldapi_find_in_os_pollfds( int fd,
struct nsldapi_os_statusinfo *pip, short revents );
#endif /* NSLDAPI_HAVE_POLL */
#endif /* NSLDAPI_AVOID_OS_SOCKETS */
static int nsldapi_iostatus_init_nolock( LDAP *ld );
static int nsldapi_add_to_cb_pollfds( Sockbuf *sb,
struct nsldapi_cb_statusinfo *pip, short events );
static int nsldapi_clear_from_cb_pollfds( Sockbuf *sb,
struct nsldapi_cb_statusinfo *pip, short events );
static int nsldapi_find_in_cb_pollfds( Sockbuf *sb,
struct nsldapi_cb_statusinfo *pip, short revents );
#ifdef irix
#ifndef _PR_THREADS
/*
* XXXmcs: on IRIX NSPR's poll() and select() wrappers will crash if NSPR
* has not been initialized. We work around the problem by bypassing
* the NSPR wrapper functions and going directly to the OS' functions.
*/
#define NSLDAPI_POLL _poll
#define NSLDAPI_SELECT _select
extern int _poll(struct pollfd *fds, unsigned long nfds, int timeout);
extern int _select(int nfds, fd_set *readfds, fd_set *writefds,
fd_set *exceptfds, struct timeval *timeout);
#else /* _PR_THREADS */
#define NSLDAPI_POLL poll
#define NSLDAPI_SELECT select
#endif /* else _PR_THREADS */
#else /* irix */
#define NSLDAPI_POLL poll
#define NSLDAPI_SELECT select
#endif /* else irix */
static LBER_SOCKET nsldapi_os_socket( LDAP *ld, int secure, int domain,
int type, int protocol );
static int nsldapi_os_ioctl( LBER_SOCKET s, int option, int *statusp );
static int nsldapi_os_connect_with_to( LBER_SOCKET s, struct sockaddr *name,
int namelen, int msec_timeout );
/*
* Function typedefs used by nsldapi_try_each_host()
*/
typedef LBER_SOCKET (NSLDAPI_SOCKET_FN)( LDAP *ld, int secure, int domain,
int type, int protocol );
typedef int (NSLDAPI_IOCTL_FN)( LBER_SOCKET s, int option, int *statusp );
typedef int (NSLDAPI_CONNECT_WITH_TO_FN )( LBER_SOCKET s, struct sockaddr *name,
int namelen, int msec_timeout );
typedef int (NSLDAPI_CONNECT_FN )( LBER_SOCKET s, struct sockaddr *name,
int namelen );
typedef int (NSLDAPI_CLOSE_FN )( LBER_SOCKET s );
static int nsldapi_try_each_host( LDAP *ld, const char *hostlist, int defport,
int secure, NSLDAPI_SOCKET_FN *socketfn, NSLDAPI_IOCTL_FN *ioctlfn,
NSLDAPI_CONNECT_WITH_TO_FN *connectwithtofn,
NSLDAPI_CONNECT_FN *connectfn, NSLDAPI_CLOSE_FN *closefn );
static int
nsldapi_os_closesocket( LBER_SOCKET s )
{
int rc;
#ifdef NSLDAPI_AVOID_OS_SOCKETS
rc = -1;
#else /* NSLDAPI_AVOID_OS_SOCKETS */
#ifdef _WINDOWS
rc = closesocket( s );
#else /* _WINDOWS */
rc = close( s );
#endif /* _WINDOWS */
#endif /* NSLDAPI_AVOID_OS_SOCKETS */
return( rc );
}
static LBER_SOCKET
nsldapi_os_socket( LDAP *ld, int secure, int domain, int type, int protocol )
{
#ifdef NSLDAPI_AVOID_OS_SOCKETS
return -1;
#else /* NSLDAPI_AVOID_OS_SOCKETS */
int s, invalid_socket;
char *errmsg = NULL;
if ( secure ) {
LDAP_SET_LDERRNO( ld, LDAP_LOCAL_ERROR, NULL,
nsldapi_strdup( "secure mode not supported" ));
return( -1 );
}
s = socket( domain, type, protocol );
/*
* if the socket() call failed or it returned a socket larger
* than we can deal with, return a "local error."
*/
if ( NSLDAPI_INVALID_OS_SOCKET( s )) {
errmsg = "unable to create a socket";
invalid_socket = 1;
} else { /* valid socket -- check for overflow */
invalid_socket = 0;
#if !defined(NSLDAPI_HAVE_POLL) && !defined(_WINDOWS)
/* not on Windows and do not have poll() */
if ( s >= FD_SETSIZE ) {
errmsg = "can't use socket >= FD_SETSIZE";
}
#endif
}
if ( errmsg != NULL ) { /* local socket error */
if ( !invalid_socket ) {
nsldapi_os_closesocket( s );
}
errmsg = nsldapi_strdup( errmsg );
LDAP_SET_LDERRNO( ld, LDAP_LOCAL_ERROR, NULL, errmsg );
return( -1 );
}
return( s );
#endif /* NSLDAPI_AVOID_OS_SOCKETS */
}
/*
* Non-blocking connect call function
*/
static int
nsldapi_os_connect_with_to(LBER_SOCKET sockfd, struct sockaddr *saptr,
int salen, int msec)
{
#ifdef NSLDAPI_AVOID_OS_SOCKETS
return -1;
#else /* NSLDAPI_AVOID_OS_SOCKETS */
int n, error;
int len;
#if defined(_WINDOWS) || defined(XP_OS2)
int nonblock = 1;
int block = 0;
#else
int flags;
#endif /* _WINDOWS */
#ifdef NSLDAPI_HAVE_POLL
struct pollfd pfd;
#else
struct timeval tval;
fd_set rset, wset;
#ifdef _WINDOWS
fd_set eset;
#endif
#endif /* NSLDAPI_HAVE_POLL */
LDAPDebug( LDAP_DEBUG_TRACE, "nsldapi_connect_nonblock timeout: %d (msec)\n",
msec, 0, 0);
#ifdef _WINDOWS
ioctlsocket(sockfd, FIONBIO, &nonblock);
#elif defined(XP_OS2)
ioctl( sockfd, FIONBIO, &nonblock, sizeof(nonblock) );
#else
flags = fcntl(sockfd, F_GETFL, 0);
fcntl(sockfd, F_SETFL, flags | O_NONBLOCK);
#endif /* _WINDOWS */
error = 0;
if ((n = connect(sockfd, saptr, salen)) < 0)
#ifdef _WINDOWS
if ((n != SOCKET_ERROR) && (WSAGetLastError() != WSAEWOULDBLOCK)) {
#else
if (errno != EINPROGRESS) {
#endif /* _WINDOWS */
#ifdef LDAP_DEBUG
if ( ldap_debug & LDAP_DEBUG_TRACE ) {
perror("connect");
}
#endif
return (-1);
}
/* success */
if (n == 0)
goto done;
#ifdef NSLDAPI_HAVE_POLL
pfd.fd = sockfd;
pfd.events = POLLOUT;
#else
FD_ZERO(&rset);
FD_SET(sockfd, &rset);
wset = rset;
#ifdef _WINDOWS
eset = rset;
#endif /* _WINDOWS */
#endif /* NSLDAPI_HAVE_POLL */
if (msec < 0 && msec != LDAP_X_IO_TIMEOUT_NO_TIMEOUT) {
LDAPDebug( LDAP_DEBUG_TRACE, "Invalid timeout value detected.."
"resetting connect timeout to default value "
"(LDAP_X_IO_TIMEOUT_NO_TIMEOUT\n", 0, 0, 0);
msec = LDAP_X_IO_TIMEOUT_NO_TIMEOUT;
#ifndef NSLDAPI_HAVE_POLL
} else {
if (msec != 0) {
tval.tv_sec = msec / 1000;
tval.tv_usec = 1000 * ( msec % 1000 );
} else {
tval.tv_sec = 0;
}
tval.tv_usec = 0;
#endif /* NSLDAPI_HAVE_POLL */
}
#ifdef NSLDAPI_HAVE_POLL
if ((n = poll(&pfd, 1,
(msec != LDAP_X_IO_TIMEOUT_NO_TIMEOUT) ? msec : -1)) == 0) {
errno = ETIMEDOUT;
return (-1);
}
if (pfd.revents & POLLOUT) {
len = sizeof(error);
if (getsockopt(sockfd, SOL_SOCKET, SO_ERROR, (char *)&error, &len)
< 0)
return (-1);
#ifdef LDAP_DEBUG
} else if ( ldap_debug & LDAP_DEBUG_TRACE ) {
perror("poll error: sockfd not set");
#endif
}
#else /* NSLDAPI_HAVE_POLL */
/* if timeval structure == NULL, select will block indefinitely */
/* != NULL, and value == 0, select will */
/* not block */
/* Windows is a bit quirky on how it behaves w.r.t nonblocking */
/* connects. If the connect fails, the exception fd, eset, is */
/* set to show the failure. The first argument in select is */
/* ignored */
#ifdef _WINDOWS
if ((n = select(sockfd +1, &rset, &wset, &eset,
(msec != LDAP_X_IO_TIMEOUT_NO_TIMEOUT) ? &tval : NULL)) == 0) {
errno = WSAETIMEDOUT;
return (-1);
}
/* if wset is set, the connect worked */
if (FD_ISSET(sockfd, &wset) || FD_ISSET(sockfd, &rset)) {
len = sizeof(error);
if (getsockopt(sockfd, SOL_SOCKET, SO_ERROR, (char *)&error, &len)
< 0)
return (-1);
goto done;
}
/* if eset is set, the connect failed */
if (FD_ISSET(sockfd, &eset)) {
return (-1);
}
/* failure on select call */
if (n == SOCKET_ERROR) {
perror("select error: SOCKET_ERROR returned");
return (-1);
}
#else
if ((n = select(sockfd +1, &rset, &wset, NULL,
(msec != LDAP_X_IO_TIMEOUT_NO_TIMEOUT) ? &tval : NULL)) == 0) {
errno = ETIMEDOUT;
return (-1);
}
if (FD_ISSET(sockfd, &rset) || FD_ISSET(sockfd, &wset)) {
len = sizeof(error);
if (getsockopt(sockfd, SOL_SOCKET, SO_ERROR, (char *)&error, &len)
< 0)
return (-1);
#ifdef LDAP_DEBUG
} else if ( ldap_debug & LDAP_DEBUG_TRACE ) {
perror("select error: sockfd not set");
#endif
}
#endif /* _WINDOWS */
#endif /* NSLDAPI_HAVE_POLL */
done:
#ifdef _WINDOWS
ioctlsocket(sockfd, FIONBIO, &block);
#elif defined(XP_OS2)
ioctl( sockfd, FIONBIO, &nonblock, sizeof(block) );
#else
fcntl(sockfd, F_SETFL, flags);
#endif /* _WINDOWS */
if (error) {
errno = error;
return (-1);
}
return (0);
#endif /* NSLDAPI_AVOID_OS_SOCKETS */
}
static int
nsldapi_os_ioctl( LBER_SOCKET s, int option, int *statusp )
{
#ifdef NSLDAPI_AVOID_OS_SOCKETS
return -1;
#else /* NSLDAPI_AVOID_OS_SOCKETS */
int err;
#if defined(_WINDOWS) || defined(XP_OS2)
u_long iostatus;
#endif
if ( FIONBIO != option ) {
return( -1 );
}
#ifdef _WINDOWS
iostatus = *(u_long *)statusp;
err = ioctlsocket( s, FIONBIO, &iostatus );
#else
#ifdef XP_OS2
err = ioctl( s, FIONBIO, (caddr_t)&iostatus, sizeof(iostatus) );
#else
err = ioctl( s, FIONBIO, (caddr_t)statusp );
#endif
#endif
return( err );
#endif /* NSLDAPI_AVOID_OS_SOCKETS */
}
int
nsldapi_connect_to_host( LDAP *ld, Sockbuf *sb, const char *hostlist,
int defport, int secure, char **krbinstancep )
/*
* "defport" must be in host byte order
* zero is returned upon success, -1 if fatal error, -2 EINPROGRESS
* if -1 is returned, ld_errno is set
*/
{
int s;
LDAPDebug( LDAP_DEBUG_TRACE, "nsldapi_connect_to_host: %s, port: %d\n",
NULL == hostlist ? "NULL" : hostlist, defport, 0 );
/*
* If an extended I/O connect callback has been defined, just use it.
*/
if ( NULL != ld->ld_extconnect_fn ) {
unsigned long connect_opts = 0;
if ( ld->ld_options & LDAP_BITOPT_ASYNC) {
connect_opts |= LDAP_X_EXTIOF_OPT_NONBLOCKING;
}
if ( secure ) {
connect_opts |= LDAP_X_EXTIOF_OPT_SECURE;
}
s = ld->ld_extconnect_fn( hostlist, defport,
ld->ld_connect_timeout, connect_opts,
ld->ld_ext_session_arg,
&sb->sb_ext_io_fns.lbextiofn_socket_arg );
} else {
#ifdef NSLDAPI_AVOID_OS_SOCKETS
return( -1 );
#else /* NSLDAPI_AVOID_OS_SOCKETS */
s = nsldapi_try_each_host( ld, hostlist,
defport, secure, nsldapi_os_socket,
nsldapi_os_ioctl, nsldapi_os_connect_with_to,
NULL, nsldapi_os_closesocket );
#endif /* NSLDAPI_AVOID_OS_SOCKETS */
}
if ( s < 0 ) {
LDAP_SET_LDERRNO( ld, LDAP_CONNECT_ERROR, NULL, NULL );
return( -1 );
}
sb->sb_sd = s;
/*
* Set krbinstancep (canonical name of host for use by Kerberos).
*/
#ifdef KERBEROS
char *p;
if (( *krbinstancep = nsldapi_host_connected_to( sb )) != NULL
&& ( p = strchr( *krbinstancep, '.' )) != NULL ) {
*p = '\0';
}
#else /* KERBEROS */
*krbinstancep = NULL;
#endif /* KERBEROS */
return( 0 );
}
/*
* Returns a socket number if successful and -1 if an error occurs.
*/
static int
nsldapi_try_each_host( LDAP *ld, const char *hostlist,
int defport, int secure, NSLDAPI_SOCKET_FN *socketfn,
NSLDAPI_IOCTL_FN *ioctlfn, NSLDAPI_CONNECT_WITH_TO_FN *connectwithtofn,
NSLDAPI_CONNECT_FN *connectfn, NSLDAPI_CLOSE_FN *closefn )
{
#ifdef NSLDAPI_AVOID_OS_SOCKETS
return -1;
#else /* NSLDAPI_AVOID_OS_SOCKETS */
int rc, i, s, err, connected, use_hp;
int parse_err, port;
struct sockaddr_in sin;
nsldapi_in_addr_t address;
char **addrlist, *ldhpbuf, *ldhpbuf_allocd;
char *host;
LDAPHostEnt ldhent, *ldhp;
struct hostent *hp;
struct ldap_x_hostlist_status *status;
#ifdef GETHOSTBYNAME_BUF_T
GETHOSTBYNAME_BUF_T hbuf;
struct hostent hent;
#endif /* GETHOSTBYNAME_BUF_T */
connected = 0;
parse_err = ldap_x_hostlist_first( hostlist, defport, &host, &port,
&status );
while ( !connected && LDAP_SUCCESS == parse_err && host != NULL ) {
ldhpbuf_allocd = NULL;
ldhp = NULL;
hp = NULL;
s = 0;
use_hp = 0;
addrlist = NULL;
if (( address = inet_addr( host )) == -1 ) {
if ( ld->ld_dns_gethostbyname_fn == NULL ) {
if (( hp = GETHOSTBYNAME( host, &hent, hbuf,
sizeof(hbuf), &err )) != NULL ) {
addrlist = hp->h_addr_list;
}
} else {
/*
* DNS callback installed... use it.
*/
#ifdef GETHOSTBYNAME_buf_t
/* avoid allocation by using hbuf if large enough */
if ( sizeof( hbuf ) < ld->ld_dns_bufsize ) {
ldhpbuf = ldhpbuf_allocd
= NSLDAPI_MALLOC( ld->ld_dns_bufsize );
} else {
ldhpbuf = (char *)hbuf;
}
#else /* GETHOSTBYNAME_buf_t */
ldhpbuf = ldhpbuf_allocd = NSLDAPI_MALLOC(
ld->ld_dns_bufsize );
#endif /* else GETHOSTBYNAME_buf_t */
if ( ldhpbuf == NULL ) {
LDAP_SET_LDERRNO( ld, LDAP_NO_MEMORY,
NULL, NULL );
ldap_memfree( host );
ldap_x_hostlist_statusfree( status );
return( -1 );
}
if (( ldhp = ld->ld_dns_gethostbyname_fn( host,
&ldhent, ldhpbuf, ld->ld_dns_bufsize, &err,
ld->ld_dns_extradata )) != NULL ) {
addrlist = ldhp->ldaphe_addr_list;
}
}
if ( addrlist == NULL ) {
LDAP_SET_LDERRNO( ld, LDAP_CONNECT_ERROR, NULL, NULL );
LDAP_SET_ERRNO( ld, EHOSTUNREACH ); /* close enough */
if ( ldhpbuf_allocd != NULL ) {
NSLDAPI_FREE( ldhpbuf_allocd );
}
ldap_memfree( host );
ldap_x_hostlist_statusfree( status );
return( -1 );
}
use_hp = 1;
}
rc = -1;
for ( i = 0; !use_hp || ( addrlist[ i ] != 0 ); i++ ) {
if ( -1 == ( s = (*socketfn)( ld, secure, AF_INET,
SOCK_STREAM, 0 ))) {
if ( ldhpbuf_allocd != NULL ) {
NSLDAPI_FREE( ldhpbuf_allocd );
}
ldap_memfree( host );
ldap_x_hostlist_statusfree( status );
return( -1 );
}
if ( ld->ld_options & LDAP_BITOPT_ASYNC ) {
int iostatus = 1;
err = (*ioctlfn)( s, FIONBIO, &iostatus );
if ( err == -1 ) {
LDAPDebug( LDAP_DEBUG_ANY,
"FIONBIO ioctl failed on %d\n",
s, 0, 0 );
}
}
(void)memset( (char *)&sin, 0, sizeof( struct sockaddr_in ));
sin.sin_family = AF_INET;
sin.sin_port = htons( (unsigned short)port );
SAFEMEMCPY( (char *) &sin.sin_addr.s_addr,
( use_hp ? (char *) addrlist[ i ] :
(char *) &address ), sizeof( sin.sin_addr.s_addr) );
{
#ifdef LDAP_CONNECT_MUST_NOT_BE_INTERRUPTED
/*
* Block all of the signals that might interrupt connect() since there
* is an OS bug that causes connect() to fail if it is restarted. Look in
* ns/netsite/ldap/include/portable.h for the definition of
* LDAP_CONNECT_MUST_NOT_BE_INTERRUPTED
*/
sigset_t ints_off, oldset;
sigemptyset( &ints_off );
sigaddset( &ints_off, SIGALRM );
sigaddset( &ints_off, SIGIO );
sigaddset( &ints_off, SIGCLD );
sigprocmask( SIG_BLOCK, &ints_off, &oldset );
#endif /* LDAP_CONNECT_MUST_NOT_BE_INTERRUPTED */
if ( NULL != connectwithtofn ) {
err = (*connectwithtofn)(s,
(struct sockaddr *)&sin,
sizeof(struct sockaddr_in),
ld->ld_connect_timeout);
} else {
err = (*connectfn)(s,
(struct sockaddr *)&sin,
sizeof(struct sockaddr_in));
}
#ifdef LDAP_CONNECT_MUST_NOT_BE_INTERRUPTED
/*
* restore original signal mask
*/
sigprocmask( SIG_SETMASK, &oldset, 0 );
#endif /* LDAP_CONNECT_MUST_NOT_BE_INTERRUPTED */
}
if ( err >= 0 ) {
connected = 1;
rc = 0;
break;
} else {
if ( ld->ld_options & LDAP_BITOPT_ASYNC) {
#ifdef _WINDOWS
if (err == -1 && WSAGetLastError() == WSAEWOULDBLOCK)
LDAP_SET_ERRNO( ld, EWOULDBLOCK );
#endif /* _WINDOWS */
err = LDAP_GET_ERRNO( ld );
if ( NSLDAPI_ERRNO_IO_INPROGRESS( err )) {
LDAPDebug( LDAP_DEBUG_TRACE, "connect would block...\n",
0, 0, 0 );
rc = -2;
break;
}
}
#ifdef LDAP_DEBUG
if ( ldap_debug & LDAP_DEBUG_TRACE ) {
perror( (char *)inet_ntoa( sin.sin_addr ));
}
#endif
(*closefn)( s );
if ( !use_hp ) {
break;
}
}
}
ldap_memfree( host );
parse_err = ldap_x_hostlist_next( &host, &port, status );
}
if ( ldhpbuf_allocd != NULL ) {
NSLDAPI_FREE( ldhpbuf_allocd );
}
ldap_memfree( host );
ldap_x_hostlist_statusfree( status );
if ( connected ) {
LDAPDebug( LDAP_DEBUG_TRACE, "sd %d connected to: %s\n",
s, inet_ntoa( sin.sin_addr ), 0 );
}
return( rc == 0 ? s : -1 );
#endif /* NSLDAPI_AVOID_OS_SOCKETS */
}
void
nsldapi_close_connection( LDAP *ld, Sockbuf *sb )
{
if ( ld->ld_extclose_fn == NULL ) {
#ifndef NSLDAPI_AVOID_OS_SOCKETS
nsldapi_os_closesocket( sb->sb_sd );
#endif /* NSLDAPI_AVOID_OS_SOCKETS */
} else {
ld->ld_extclose_fn( sb->sb_sd,
sb->sb_ext_io_fns.lbextiofn_socket_arg );
}
}
#ifdef KERBEROS
char *
nsldapi_host_connected_to( Sockbuf *sb )
{
struct hostent *hp;
char *p;
int len;
struct sockaddr_in sin;
(void)memset( (char *)&sin, 0, sizeof( struct sockaddr_in ));
len = sizeof( sin );
if ( getpeername( sb->sb_sd, (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.
*/
#error XXXmcs: need to use DNS callbacks here
if (( hp = gethostbyaddr( (char *) &sin.sin_addr,
sizeof( sin.sin_addr ), AF_INET )) != NULL ) {
if ( hp->h_name != NULL ) {
return( nsldapi_strdup( hp->h_name ));
}
}
return( NULL );
}
#endif /* KERBEROS */
/*
* Returns 0 if all goes well and -1 if an error occurs (error code set in ld)
* Also allocates initializes ld->ld_iostatus if needed..
*/
int
nsldapi_iostatus_interest_write( LDAP *ld, Sockbuf *sb )
{
NSLDAPIIOStatus *iosp;
LDAP_MUTEX_LOCK( ld, LDAP_IOSTATUS_LOCK );
if ( ld->ld_iostatus == NULL
&& nsldapi_iostatus_init_nolock( ld ) < 0 ) {
LDAP_MUTEX_UNLOCK( ld, LDAP_IOSTATUS_LOCK );
return( -1 );
}
iosp = ld->ld_iostatus;
if ( iosp->ios_type == NSLDAPI_IOSTATUS_TYPE_OSNATIVE ) {
#ifdef NSLDAPI_AVOID_OS_SOCKETS
return( -1 );
#else /* NSLDAPI_AVOID_OS_SOCKETS */
#ifdef NSLDAPI_HAVE_POLL
if ( nsldapi_add_to_os_pollfds( sb->sb_sd,
&iosp->ios_status.ios_osinfo, POLLOUT )) {
++iosp->ios_write_count;
}
#else /* NSLDAPI_HAVE_POLL */
if ( !FD_ISSET( sb->sb_sd,
&iosp->ios_status.ios_osinfo.ossi_writefds )) {
FD_SET( sb->sb_sd,
&iosp->ios_status.ios_osinfo.ossi_writefds );
++iosp->ios_write_count;
}
#endif /* else NSLDAPI_HAVE_POLL */
#endif /* NSLDAPI_AVOID_OS_SOCKETS */
} else if ( iosp->ios_type == NSLDAPI_IOSTATUS_TYPE_CALLBACK ) {
if ( nsldapi_add_to_cb_pollfds( sb,
&iosp->ios_status.ios_cbinfo, LDAP_X_POLLOUT )) {
++iosp->ios_write_count;
}
} else {
LDAPDebug( LDAP_DEBUG_ANY,
"nsldapi_iostatus_interest_write: unknown I/O type %d\n",
iosp->ios_type, 0, 0 );
}
LDAP_MUTEX_UNLOCK( ld, LDAP_IOSTATUS_LOCK );
return( 0 );
}
/*
* Returns 0 if all goes well and -1 if an error occurs (error code set in ld)
* Also allocates initializes ld->ld_iostatus if needed..
*/
int
nsldapi_iostatus_interest_read( LDAP *ld, Sockbuf *sb )
{
NSLDAPIIOStatus *iosp;
LDAP_MUTEX_LOCK( ld, LDAP_IOSTATUS_LOCK );
if ( ld->ld_iostatus == NULL
&& nsldapi_iostatus_init_nolock( ld ) < 0 ) {
LDAP_MUTEX_UNLOCK( ld, LDAP_IOSTATUS_LOCK );
return( -1 );
}
iosp = ld->ld_iostatus;
if ( iosp->ios_type == NSLDAPI_IOSTATUS_TYPE_OSNATIVE ) {
#ifdef NSLDAPI_AVOID_OS_SOCKETS
return( -1 );
#else /* NSLDAPI_AVOID_OS_SOCKETS */
#ifdef NSLDAPI_HAVE_POLL
if ( nsldapi_add_to_os_pollfds( sb->sb_sd,
&iosp->ios_status.ios_osinfo, POLLIN )) {
++iosp->ios_read_count;
}
#else /* NSLDAPI_HAVE_POLL */
if ( !FD_ISSET( sb->sb_sd,
&iosp->ios_status.ios_osinfo.ossi_readfds )) {
FD_SET( sb->sb_sd,
&iosp->ios_status.ios_osinfo.ossi_readfds );
++iosp->ios_read_count;
}
#endif /* else NSLDAPI_HAVE_POLL */
#endif /* NSLDAPI_AVOID_OS_SOCKETS */
} else if ( iosp->ios_type == NSLDAPI_IOSTATUS_TYPE_CALLBACK ) {
if ( nsldapi_add_to_cb_pollfds( sb,
&iosp->ios_status.ios_cbinfo, LDAP_X_POLLIN )) {
++iosp->ios_read_count;
}
} else {
LDAPDebug( LDAP_DEBUG_ANY,
"nsldapi_iostatus_interest_read: unknown I/O type %d\n",
iosp->ios_type, 0, 0 );
}
LDAP_MUTEX_UNLOCK( ld, LDAP_IOSTATUS_LOCK );
return( 0 );
}
/*
* Returns 0 if all goes well and -1 if an error occurs (error code set in ld)
* Also allocates initializes ld->ld_iostatus if needed..
*/
int
nsldapi_iostatus_interest_clear( LDAP *ld, Sockbuf *sb )
{
NSLDAPIIOStatus *iosp;
LDAP_MUTEX_LOCK( ld, LDAP_IOSTATUS_LOCK );
if ( ld->ld_iostatus == NULL
&& nsldapi_iostatus_init_nolock( ld ) < 0 ) {
LDAP_MUTEX_UNLOCK( ld, LDAP_IOSTATUS_LOCK );
return( -1 );
}
iosp = ld->ld_iostatus;
if ( iosp->ios_type == NSLDAPI_IOSTATUS_TYPE_OSNATIVE ) {
#ifdef NSLDAPI_AVOID_OS_SOCKETS
return( -1 );
#else /* NSLDAPI_AVOID_OS_SOCKETS */
#ifdef NSLDAPI_HAVE_POLL
if ( nsldapi_clear_from_os_pollfds( sb->sb_sd,
&iosp->ios_status.ios_osinfo, POLLOUT )) {
--iosp->ios_write_count;
}
if ( nsldapi_clear_from_os_pollfds( sb->sb_sd,
&iosp->ios_status.ios_osinfo, POLLIN )) {
--iosp->ios_read_count;
}
#else /* NSLDAPI_HAVE_POLL */
if ( FD_ISSET( sb->sb_sd,
&iosp->ios_status.ios_osinfo.ossi_writefds )) {
FD_CLR( sb->sb_sd,
&iosp->ios_status.ios_osinfo.ossi_writefds );
--iosp->ios_write_count;
}
if ( FD_ISSET( sb->sb_sd,
&iosp->ios_status.ios_osinfo.ossi_readfds )) {
FD_CLR( sb->sb_sd,
&iosp->ios_status.ios_osinfo.ossi_readfds );
--iosp->ios_read_count;
}
#endif /* else NSLDAPI_HAVE_POLL */
#endif /* NSLDAPI_AVOID_OS_SOCKETS */
} else if ( iosp->ios_type == NSLDAPI_IOSTATUS_TYPE_CALLBACK ) {
if ( nsldapi_clear_from_cb_pollfds( sb,
&iosp->ios_status.ios_cbinfo, LDAP_X_POLLOUT )) {
--iosp->ios_write_count;
}
if ( nsldapi_clear_from_cb_pollfds( sb,
&iosp->ios_status.ios_cbinfo, LDAP_X_POLLIN )) {
--iosp->ios_read_count;
}
} else {
LDAPDebug( LDAP_DEBUG_ANY,
"nsldapi_iostatus_interest_clear: unknown I/O type %d\n",
iosp->ios_type, 0, 0 );
}
LDAP_MUTEX_UNLOCK( ld, LDAP_IOSTATUS_LOCK );
return( 0 );
}
/*
* Return a non-zero value if sb is ready for write.
*/
int
nsldapi_iostatus_is_write_ready( LDAP *ld, Sockbuf *sb )
{
int rc;
NSLDAPIIOStatus *iosp;
LDAP_MUTEX_LOCK( ld, LDAP_IOSTATUS_LOCK );
iosp = ld->ld_iostatus;
if ( iosp->ios_type == NSLDAPI_IOSTATUS_TYPE_OSNATIVE ) {
#ifdef NSLDAPI_AVOID_OS_SOCKETS
return 0;
#else /* NSLDAPI_AVOID_OS_SOCKETS */
#ifdef NSLDAPI_HAVE_POLL
/*
* if we are using poll() we do something a little tricky: if
* any bits in the socket's returned events field other than
* POLLIN (ready for read) are set, we return true. This
* is done so we notice when a server closes a connection
* or when another error occurs. The actual error will be
* noticed later when we call write() or send().
*/
rc = nsldapi_find_in_os_pollfds( sb->sb_sd,
&iosp->ios_status.ios_osinfo, ~POLLIN );
#else /* NSLDAPI_HAVE_POLL */
rc = FD_ISSET( sb->sb_sd,
&iosp->ios_status.ios_osinfo.ossi_use_writefds );
#endif /* else NSLDAPI_HAVE_POLL */
#endif /* NSLDAPI_AVOID_OS_SOCKETS */
} else if ( iosp->ios_type == NSLDAPI_IOSTATUS_TYPE_CALLBACK ) {
rc = nsldapi_find_in_cb_pollfds( sb,
&iosp->ios_status.ios_cbinfo, ~LDAP_X_POLLIN );
} else {
LDAPDebug( LDAP_DEBUG_ANY,
"nsldapi_iostatus_is_write_ready: unknown I/O type %d\n",
iosp->ios_type, 0, 0 );
rc = 0;
}
LDAP_MUTEX_UNLOCK( ld, LDAP_IOSTATUS_LOCK );
return( rc );
}
/*
* Return a non-zero value if sb is ready for read.
*/
int
nsldapi_iostatus_is_read_ready( LDAP *ld, Sockbuf *sb )
{
int rc;
NSLDAPIIOStatus *iosp;
LDAP_MUTEX_LOCK( ld, LDAP_IOSTATUS_LOCK );
iosp = ld->ld_iostatus;
if ( iosp->ios_type == NSLDAPI_IOSTATUS_TYPE_OSNATIVE ) {
#ifdef NSLDAPI_AVOID_OS_SOCKETS
return 0;
#else /* NSLDAPI_AVOID_OS_SOCKETS */
#ifdef NSLDAPI_HAVE_POLL
/*
* if we are using poll() we do something a little tricky: if
* any bits in the socket's returned events field other than
* POLLOUT (ready for write) are set, we return true. This
* is done so we notice when a server closes a connection
* or when another error occurs. The actual error will be
* noticed later when we call read() or recv().
*/
rc = nsldapi_find_in_os_pollfds( sb->sb_sd,
&iosp->ios_status.ios_osinfo, ~POLLOUT );
#else /* NSLDAPI_HAVE_POLL */
rc = FD_ISSET( sb->sb_sd,
&iosp->ios_status.ios_osinfo.ossi_use_readfds );
#endif /* else NSLDAPI_HAVE_POLL */
#endif /* NSLDAPI_AVOID_OS_SOCKETS */
} else if ( iosp->ios_type == NSLDAPI_IOSTATUS_TYPE_CALLBACK ) {
rc = nsldapi_find_in_cb_pollfds( sb,
&iosp->ios_status.ios_cbinfo, ~LDAP_X_POLLOUT );
} else {
LDAPDebug( LDAP_DEBUG_ANY,
"nsldapi_iostatus_is_read_ready: unknown I/O type %d\n",
iosp->ios_type, 0, 0 );
rc = 0;
}
LDAP_MUTEX_UNLOCK( ld, LDAP_IOSTATUS_LOCK );
return( rc );
}
/*
* Allocate and initialize ld->ld_iostatus if not already done.
* Should be called with LDAP_IOSTATUS_LOCK locked.
* Returns 0 if all goes well and -1 if not (sets error in ld)
*/
static int
nsldapi_iostatus_init_nolock( LDAP *ld )
{
NSLDAPIIOStatus *iosp;
if ( ld->ld_iostatus != NULL ) {
return( 0 );
}
if (( iosp = (NSLDAPIIOStatus *)NSLDAPI_CALLOC( 1,
sizeof( NSLDAPIIOStatus ))) == NULL ) {
LDAP_SET_LDERRNO( ld, LDAP_NO_MEMORY, NULL, NULL );
return( -1 );
}
if ( ld->ld_extpoll_fn == NULL ) {
iosp->ios_type = NSLDAPI_IOSTATUS_TYPE_OSNATIVE;
#ifdef NSLDAPI_AVOID_OS_SOCKETS
return( -1 );
#else /* NSLDAPI_AVOID_OS_SOCKETS */
#ifndef NSLDAPI_HAVE_POLL
FD_ZERO( &iosp->ios_status.ios_osinfo.ossi_readfds );
FD_ZERO( &iosp->ios_status.ios_osinfo.ossi_writefds );
#endif /* !NSLDAPI_HAVE_POLL */
#endif /* NSLDAPI_AVOID_OS_SOCKETS */
} else {
iosp->ios_type = NSLDAPI_IOSTATUS_TYPE_CALLBACK;
}
ld->ld_iostatus = iosp;
return( 0 );
}
void
nsldapi_iostatus_free( LDAP *ld )
{
if ( ld == NULL ) {
return;
}
/* clean up classic I/O compatibility glue */
if ( ld->ld_io_fns_ptr != NULL ) {
if ( ld->ld_ext_session_arg != NULL ) {
NSLDAPI_FREE( ld->ld_ext_session_arg );
}
NSLDAPI_FREE( ld->ld_io_fns_ptr );
}
/* clean up I/O status tracking info. */
if ( ld->ld_iostatus != NULL ) {
NSLDAPIIOStatus *iosp = ld->ld_iostatus;
if ( iosp->ios_type == NSLDAPI_IOSTATUS_TYPE_OSNATIVE ) {
#ifdef NSLDAPI_HAVE_POLL
if ( iosp->ios_status.ios_osinfo.ossi_pollfds
!= NULL ) {
NSLDAPI_FREE(
iosp->ios_status.ios_osinfo.ossi_pollfds );
}
#endif /* NSLDAPI_HAVE_POLL */
} else if ( iosp->ios_type == NSLDAPI_IOSTATUS_TYPE_CALLBACK ) {
if ( iosp->ios_status.ios_cbinfo.cbsi_pollfds
!= NULL ) {
NSLDAPI_FREE(
iosp->ios_status.ios_cbinfo.cbsi_pollfds );
}
} else {
LDAPDebug( LDAP_DEBUG_ANY,
"nsldapi_iostatus_free: unknown I/O type %d\n",
iosp->ios_type, 0, 0 );
}
NSLDAPI_FREE( iosp );
}
}
#if !defined(NSLDAPI_HAVE_POLL) && !defined(NSLDAPI_AVOID_OS_SOCKETS)
static int
nsldapi_get_select_table_size( void )
{
static int tblsize = 0; /* static */
if ( tblsize == 0 ) {
#if defined(_WINDOWS) || defined(XP_OS2)
tblsize = FOPEN_MAX; /* ANSI spec. */
#else
#ifdef USE_SYSCONF
tblsize = sysconf( _SC_OPEN_MAX );
#else /* USE_SYSCONF */
tblsize = getdtablesize();
#endif /* else USE_SYSCONF */
#endif /* else _WINDOWS */
if ( tblsize >= FD_SETSIZE ) {
/*
* clamp value so we don't overrun the fd_set structure
*/
tblsize = FD_SETSIZE - 1;
}
}
return( tblsize );
}
#endif /* !defined(NSLDAPI_HAVE_POLL) && !defined(NSLDAPI_AVOID_OS_SOCKETS) */
static int
nsldapi_tv2ms( struct timeval *tv )
{
if ( tv == NULL ) {
return( -1 ); /* infinite timout for poll() */
}
return( tv->tv_sec * 1000 + tv->tv_usec / 1000 );
}
int
nsldapi_iostatus_poll( LDAP *ld, struct timeval *timeout )
{
int rc;
NSLDAPIIOStatus *iosp;
LDAPDebug( LDAP_DEBUG_TRACE, "nsldapi_iostatus_poll\n", 0, 0, 0 );
LDAP_MUTEX_LOCK( ld, LDAP_IOSTATUS_LOCK );
iosp = ld->ld_iostatus;
if ( iosp == NULL ||
( iosp->ios_read_count <= 0 && iosp->ios_read_count <= 0 )) {
rc = 0; /* simulate a timeout */
} else if ( iosp->ios_type == NSLDAPI_IOSTATUS_TYPE_OSNATIVE ) {
#ifndef NSLDAPI_AVOID_OS_SOCKETS
#ifdef NSLDAPI_HAVE_POLL
rc = NSLDAPI_POLL( iosp->ios_status.ios_osinfo.ossi_pollfds,
iosp->ios_status.ios_osinfo.ossi_pollfds_size,
nsldapi_tv2ms( timeout ));
#else /* NSLDAPI_HAVE_POLL */
/* two (potentially large) struct copies */
iosp->ios_status.ios_osinfo.ossi_use_readfds
= iosp->ios_status.ios_osinfo.ossi_readfds;
iosp->ios_status.ios_osinfo.ossi_use_writefds
= iosp->ios_status.ios_osinfo.ossi_writefds;
#ifdef HPUX9
rc = NSLDAPI_SELECT( nsldapi_get_select_table_size(),
(int *)&iosp->ios_status.ios_osinfo.ossi_use_readfds
(int *)&iosp->ios_status.ios_osinfo.ossi_use_writefds,
NULL, timeout );
#else
rc = NSLDAPI_SELECT( nsldapi_get_select_table_size(),
&iosp->ios_status.ios_osinfo.ossi_use_readfds,
&iosp->ios_status.ios_osinfo.ossi_use_writefds,
NULL, timeout );
#endif /* else HPUX9 */
#endif /* else NSLDAPI_HAVE_POLL */
#endif /* NSLDAPI_AVOID_OS_SOCKETS */
} else if ( iosp->ios_type == NSLDAPI_IOSTATUS_TYPE_CALLBACK ) {
/*
* We always pass the session extended I/O argument to
* the extended poll() callback.
*/
rc = ld->ld_extpoll_fn(
iosp->ios_status.ios_cbinfo.cbsi_pollfds,
iosp->ios_status.ios_cbinfo.cbsi_pollfds_size,
nsldapi_tv2ms( timeout ), ld->ld_ext_session_arg );
} else {
LDAPDebug( LDAP_DEBUG_ANY,
"nsldapi_iostatus_poll: unknown I/O type %d\n",
iosp->ios_type, 0, 0 );
rc = 0; /* simulate a timeout (what else to do?) */
}
LDAP_MUTEX_UNLOCK( ld, LDAP_IOSTATUS_LOCK );
return( rc );
}
#if defined(NSLDAPI_HAVE_POLL) && !defined(NSLDAPI_AVOID_OS_SOCKETS)
/*
* returns 1 if "fd" was added to pollfds.
* returns 1 if some of the bits in "events" were added to pollfds.
* returns 0 if no changes were made.
*/
static int
nsldapi_add_to_os_pollfds( int fd, struct nsldapi_os_statusinfo *pip,
short events )
{
int i, openslot;
/* first we check to see if "fd" is already in our pollfds */
openslot = -1;
for ( i = 0; i < pip->ossi_pollfds_size; ++i ) {
if ( pip->ossi_pollfds[ i ].fd == fd ) {
if (( pip->ossi_pollfds[ i ].events & events )
!= events ) {
pip->ossi_pollfds[ i ].events |= events;
return( 1 );
} else {
return( 0 );
}
}
if ( pip->ossi_pollfds[ i ].fd == -1 && openslot == -1 ) {
openslot = i; /* remember for later */
}
}
/*
* "fd" is not currently being poll'd on -- add to array.
* if we need to expand the pollfds array, we do it in increments of
* NSLDAPI_POLL_ARRAY_GROWTH (#define near the top of this file).
*/
if ( openslot == -1 ) {
struct pollfd *newpollfds;
if ( pip->ossi_pollfds_size == 0 ) {
newpollfds = (struct pollfd *)NSLDAPI_MALLOC(
NSLDAPI_POLL_ARRAY_GROWTH
* sizeof( struct pollfd ));
} else {
newpollfds = (struct pollfd *)NSLDAPI_REALLOC(
pip->ossi_pollfds, (NSLDAPI_POLL_ARRAY_GROWTH
+ pip->ossi_pollfds_size)
* sizeof( struct pollfd ));
}
if ( newpollfds == NULL ) { /* XXXmcs: no way to return err! */
return( 0 );
}
pip->ossi_pollfds = newpollfds;
openslot = pip->ossi_pollfds_size;
pip->ossi_pollfds_size += NSLDAPI_POLL_ARRAY_GROWTH;
for ( i = openslot + 1; i < pip->ossi_pollfds_size; ++i ) {
pip->ossi_pollfds[ i ].fd = -1;
pip->ossi_pollfds[ i ].events =
pip->ossi_pollfds[ i ].revents = 0;
}
}
pip->ossi_pollfds[ openslot ].fd = fd;
pip->ossi_pollfds[ openslot ].events = events;
pip->ossi_pollfds[ openslot ].revents = 0;
return( 1 );
}
/*
* returns 1 if any "events" from "fd" were removed from pollfds
* returns 0 of "fd" wasn't in pollfds or if events did not overlap.
*/
static int
nsldapi_clear_from_os_pollfds( int fd, struct nsldapi_os_statusinfo *pip,
short events )
{
int i;
for ( i = 0; i < pip->ossi_pollfds_size; ++i ) {
if ( pip->ossi_pollfds[i].fd == fd ) {
if (( pip->ossi_pollfds[ i ].events & events ) != 0 ) {
pip->ossi_pollfds[ i ].events &= ~events;
if ( pip->ossi_pollfds[ i ].events == 0 ) {
pip->ossi_pollfds[i].fd = -1;
}
return( 1 ); /* events overlap */
} else {
return( 0 ); /* events do not overlap */
}
}
}
return( 0 ); /* "fd" was not found */
}
/*
* returns 1 if any "revents" from "fd" were set in pollfds revents field.
* returns 0 if not.
*/
static int
nsldapi_find_in_os_pollfds( int fd, struct nsldapi_os_statusinfo *pip,
short revents )
{
int i;
for ( i = 0; i < pip->ossi_pollfds_size; ++i ) {
if ( pip->ossi_pollfds[i].fd == fd ) {
if (( pip->ossi_pollfds[ i ].revents & revents ) != 0 ) {
return( 1 ); /* revents overlap */
} else {
return( 0 ); /* revents do not overlap */
}
}
}
return( 0 ); /* "fd" was not found */
}
#endif /* !defined(NSLDAPI_HAVE_POLL) && !defined(NSLDAPI_AVOID_OS_SOCKETS) */
/*
* returns 1 if "sb" was added to pollfds.
* returns 1 if some of the bits in "events" were added to pollfds.
* returns 0 if no changes were made.
*/
static int
nsldapi_add_to_cb_pollfds( Sockbuf *sb, struct nsldapi_cb_statusinfo *pip,
short events )
{
int i, openslot;
/* first we check to see if "sb" is already in our pollfds */
openslot = -1;
for ( i = 0; i < pip->cbsi_pollfds_size; ++i ) {
if ( NSLDAPI_CB_POLL_MATCH( sb, pip->cbsi_pollfds[ i ] )) {
if (( pip->cbsi_pollfds[ i ].lpoll_events & events )
!= events ) {
pip->cbsi_pollfds[ i ].lpoll_events |= events;
return( 1 );
} else {
return( 0 );
}
}
if ( pip->cbsi_pollfds[ i ].lpoll_fd == -1 && openslot == -1 ) {
openslot = i; /* remember for later */
}
}
/*
* "sb" is not currently being poll'd on -- add to array.
* if we need to expand the pollfds array, we do it in increments of
* NSLDAPI_POLL_ARRAY_GROWTH (#define near the top of this file).
*/
if ( openslot == -1 ) {
LDAP_X_PollFD *newpollfds;
if ( pip->cbsi_pollfds_size == 0 ) {
newpollfds = (LDAP_X_PollFD *)NSLDAPI_MALLOC(
NSLDAPI_POLL_ARRAY_GROWTH
* sizeof( LDAP_X_PollFD ));
} else {
newpollfds = (LDAP_X_PollFD *)NSLDAPI_REALLOC(
pip->cbsi_pollfds, (NSLDAPI_POLL_ARRAY_GROWTH
+ pip->cbsi_pollfds_size)
* sizeof( LDAP_X_PollFD ));
}
if ( newpollfds == NULL ) { /* XXXmcs: no way to return err! */
return( 0 );
}
pip->cbsi_pollfds = newpollfds;
openslot = pip->cbsi_pollfds_size;
pip->cbsi_pollfds_size += NSLDAPI_POLL_ARRAY_GROWTH;
for ( i = openslot + 1; i < pip->cbsi_pollfds_size; ++i ) {
pip->cbsi_pollfds[ i ].lpoll_fd = -1;
pip->cbsi_pollfds[ i ].lpoll_socketarg = NULL;
pip->cbsi_pollfds[ i ].lpoll_events =
pip->cbsi_pollfds[ i ].lpoll_revents = 0;
}
}
pip->cbsi_pollfds[ openslot ].lpoll_fd = sb->sb_sd;
pip->cbsi_pollfds[ openslot ].lpoll_socketarg =
sb->sb_ext_io_fns.lbextiofn_socket_arg;
pip->cbsi_pollfds[ openslot ].lpoll_events = events;
pip->cbsi_pollfds[ openslot ].lpoll_revents = 0;
return( 1 );
}
/*
* returns 1 if any "events" from "sb" were removed from pollfds
* returns 0 of "sb" wasn't in pollfds or if events did not overlap.
*/
static int
nsldapi_clear_from_cb_pollfds( Sockbuf *sb,
struct nsldapi_cb_statusinfo *pip, short events )
{
int i;
for ( i = 0; i < pip->cbsi_pollfds_size; ++i ) {
if ( NSLDAPI_CB_POLL_MATCH( sb, pip->cbsi_pollfds[ i ] )) {
if (( pip->cbsi_pollfds[ i ].lpoll_events
& events ) != 0 ) {
pip->cbsi_pollfds[ i ].lpoll_events &= ~events;
if ( pip->cbsi_pollfds[ i ].lpoll_events
== 0 ) {
pip->cbsi_pollfds[i].lpoll_fd = -1;
}
return( 1 ); /* events overlap */
} else {
return( 0 ); /* events do not overlap */
}
}
}
return( 0 ); /* "sb" was not found */
}
/*
* returns 1 if any "revents" from "sb" were set in pollfds revents field.
* returns 0 if not.
*/
static int
nsldapi_find_in_cb_pollfds( Sockbuf *sb, struct nsldapi_cb_statusinfo *pip,
short revents )
{
int i;
for ( i = 0; i < pip->cbsi_pollfds_size; ++i ) {
if ( NSLDAPI_CB_POLL_MATCH( sb, pip->cbsi_pollfds[ i ] )) {
if (( pip->cbsi_pollfds[ i ].lpoll_revents
& revents ) != 0 ) {
return( 1 ); /* revents overlap */
} else {
return( 0 ); /* revents do not overlap */
}
}
}
return( 0 ); /* "sb" was not found */
}
/*
* Install read and write functions into lber layer / sb
*/
int
nsldapi_install_lber_extiofns( LDAP *ld, Sockbuf *sb )
{
struct lber_x_ext_io_fns lberiofns;
if ( NULL != sb ) {
lberiofns.lbextiofn_size = LBER_X_EXTIO_FNS_SIZE;
lberiofns.lbextiofn_read = ld->ld_extread_fn;
lberiofns.lbextiofn_write = ld->ld_extwrite_fn;
lberiofns.lbextiofn_writev = ld->ld_extwritev_fn;
lberiofns.lbextiofn_socket_arg = ld->ld_ext_session_arg;
if ( ber_sockbuf_set_option( sb, LBER_SOCKBUF_OPT_EXT_IO_FNS,
&lberiofns ) != 0 ) {
return( LDAP_LOCAL_ERROR );
}
}
return( LDAP_SUCCESS );
}
/*
******************************************************************************
* One struct and several functions to bridge the gap between new extended
* I/O functions that are installed using ldap_set_option( ...,
* LDAP_OPT_EXTIO_FN_PTRS, ... ) and the original "classic" I/O functions
* (installed using LDAP_OPT_IO_FN_PTRS) follow.
*
* Our basic strategy is to use the new extended arg to hold a pointer to a
* structure that contains a pointer to the LDAP * (which contains pointers
* to the old functions so we can call them) as well as a pointer to an
* LBER_SOCKET to hold the socket used by the classic functions (the new
* functions use a simple int for the socket).
*/
typedef struct nsldapi_compat_socket_info {
LBER_SOCKET csi_socket;
LDAP *csi_ld;
} NSLDAPICompatSocketInfo;
static int LDAP_CALLBACK
nsldapi_ext_compat_read( int s, void *buf, int len,
struct lextiof_socket_private *arg )
{
NSLDAPICompatSocketInfo *csip = (NSLDAPICompatSocketInfo *)arg;
struct ldap_io_fns *iofns = csip->csi_ld->ld_io_fns_ptr;
return( iofns->liof_read( csip->csi_socket, buf, len ));
}
static int LDAP_CALLBACK
nsldapi_ext_compat_write( int s, const void *buf, int len,
struct lextiof_socket_private *arg )
{
NSLDAPICompatSocketInfo *csip = (NSLDAPICompatSocketInfo *)arg;
struct ldap_io_fns *iofns = csip->csi_ld->ld_io_fns_ptr;
return( iofns->liof_write( csip->csi_socket, buf, len ));
}
static int LDAP_CALLBACK
nsldapi_ext_compat_poll( LDAP_X_PollFD fds[], int nfds, int timeout,
struct lextiof_session_private *arg )
{
NSLDAPICompatSocketInfo *csip = (NSLDAPICompatSocketInfo *)arg;
struct ldap_io_fns *iofns = csip->csi_ld->ld_io_fns_ptr;
fd_set readfds, writefds;
int i, rc, maxfd = 0;
struct timeval tv, *tvp;
/*
* Prepare fd_sets for select()
*/
FD_ZERO( &readfds );
FD_ZERO( &writefds );
for ( i = 0; i < nfds; ++i ) {
if ( fds[ i ].lpoll_fd < 0 ) {
continue;
}
if ( fds[ i ].lpoll_fd >= FD_SETSIZE ) {
LDAP_SET_ERRNO( csip->csi_ld, EINVAL );
return( -1 );
}
if ( 0 != ( fds[i].lpoll_events & LDAP_X_POLLIN )) {
FD_SET( fds[i].lpoll_fd, &readfds );
}
if ( 0 != ( fds[i].lpoll_events & LDAP_X_POLLOUT )) {
FD_SET( fds[i].lpoll_fd, &writefds );
}
fds[i].lpoll_revents = 0; /* clear revents */
if ( fds[i].lpoll_fd >= maxfd ) {
maxfd = fds[i].lpoll_fd;
}
}
/*
* select() using callback.
*/
++maxfd;
if ( timeout == -1 ) {
tvp = NULL;
} else {
tv.tv_sec = timeout / 1000;
tv.tv_usec = 1000 * ( timeout - tv.tv_sec * 1000 );
tvp = &tv;
}
rc = iofns->liof_select( maxfd, &readfds, &writefds, NULL, tvp );
if ( rc <= 0 ) { /* timeout or fatal error */
return( rc );
}
/*
* Use info. in fd_sets to populate poll() revents.
*/
for ( i = 0; i < nfds; ++i ) {
if ( fds[ i ].lpoll_fd < 0 ) {
continue;
}
if ( 0 != ( fds[i].lpoll_events & LDAP_X_POLLIN )
&& FD_ISSET( fds[i].lpoll_fd, &readfds )) {
fds[i].lpoll_revents |= LDAP_X_POLLIN;
}
if ( 0 != ( fds[i].lpoll_events & LDAP_X_POLLOUT )
&& FD_ISSET( fds[i].lpoll_fd, &writefds )) {
fds[i].lpoll_revents |= LDAP_X_POLLOUT;
}
/* XXXmcs: any other cases to deal with? LDAP_X_POLLERR? */
}
return( rc );
}
static LBER_SOCKET
nsldapi_compat_socket( LDAP *ld, int secure, int domain, int type,
int protocol )
{
int s;
s = ld->ld_io_fns_ptr->liof_socket( domain, type, protocol );
if ( s >= 0 ) {
char *errmsg = NULL;
#ifdef NSLDAPI_HAVE_POLL
if ( ld->ld_io_fns_ptr->liof_select != NULL
&& s >= FD_SETSIZE ) {
errmsg = "can't use socket >= FD_SETSIZE";
}
#elif !defined(_WINDOWS) /* not on Windows and do not have poll() */
if ( s >= FD_SETSIZE ) {
errmsg = "can't use socket >= FD_SETSIZE";
}
#endif
if ( NULL == errmsg && secure &&
ld->ld_io_fns_ptr->liof_ssl_enable( s ) < 0 ) {
errmsg = "failed to enable secure mode";
}
if ( NULL != errmsg ) {
if ( NULL == ld->ld_io_fns_ptr->liof_close ) {
nsldapi_os_closesocket( s );
} else {
ld->ld_io_fns_ptr->liof_close( s );
}
LDAP_SET_LDERRNO( ld, LDAP_LOCAL_ERROR, NULL,
nsldapi_strdup( errmsg ));
return( -1 );
}
}
return( s );
}
/*
* Note: timeout is ignored because we have no way to pass it via
* the old I/O callback interface.
*/
static int LDAP_CALLBACK
nsldapi_ext_compat_connect( const char *hostlist, int defport, int timeout,
unsigned long options, struct lextiof_session_private *sessionarg,
struct lextiof_socket_private **socketargp )
{
NSLDAPICompatSocketInfo *defcsip;
struct ldap_io_fns *iofns;
int s, secure;
NSLDAPI_SOCKET_FN *socketfn;
NSLDAPI_IOCTL_FN *ioctlfn;
NSLDAPI_CONNECT_WITH_TO_FN *connectwithtofn;
NSLDAPI_CONNECT_FN *connectfn;
NSLDAPI_CLOSE_FN *closefn;
defcsip = (NSLDAPICompatSocketInfo *)sessionarg;
iofns = defcsip->csi_ld->ld_io_fns_ptr;
if ( 0 != ( options & LDAP_X_EXTIOF_OPT_SECURE )) {
if ( NULL == iofns->liof_ssl_enable ) {
LDAP_SET_ERRNO( defcsip->csi_ld, EINVAL );
return( -1 );
}
secure = 1;
} else {
secure = 0;
}
socketfn = ( iofns->liof_socket == NULL ) ?
nsldapi_os_socket : nsldapi_compat_socket;
ioctlfn = ( iofns->liof_ioctl == NULL ) ?
nsldapi_os_ioctl : (NSLDAPI_IOCTL_FN *)(iofns->liof_ioctl);
if ( NULL == iofns->liof_connect ) {
connectwithtofn = nsldapi_os_connect_with_to;
connectfn = NULL;
} else {
connectwithtofn = NULL;
connectfn = iofns->liof_connect;
}
closefn = ( iofns->liof_close == NULL ) ?
nsldapi_os_closesocket : iofns->liof_close;
s = nsldapi_try_each_host( defcsip->csi_ld, hostlist, defport,
secure, socketfn, ioctlfn, connectwithtofn,
connectfn, closefn );
if ( s >= 0 ) {
NSLDAPICompatSocketInfo *csip;
if (( csip = (NSLDAPICompatSocketInfo *)NSLDAPI_CALLOC( 1,
sizeof( NSLDAPICompatSocketInfo ))) == NULL ) {
(*closefn)( s );
LDAP_SET_LDERRNO( defcsip->csi_ld, LDAP_NO_MEMORY,
NULL, NULL );
return( -1 );
}
csip->csi_socket = s;
csip->csi_ld = defcsip->csi_ld;
*socketargp = (void *)csip;
/*
* We always return 1, which is a valid but not unique socket
* (file descriptor) number. The extended I/O functions only
* require that the combination of the void *arg and the int
* socket be unique. Since we allocate the
* NSLDAPICompatSocketInfo that we assign to arg, we meet
* that requirement.
*/
s = 1;
}
return( s );
}
static int LDAP_CALLBACK
nsldapi_ext_compat_close( int s, struct lextiof_socket_private *arg )
{
NSLDAPICompatSocketInfo *csip = (NSLDAPICompatSocketInfo *)arg;
struct ldap_io_fns *iofns = csip->csi_ld->ld_io_fns_ptr;
int rc;
rc = iofns->liof_close( csip->csi_socket );
NSLDAPI_FREE( csip );
return( rc );
}
/*
* Install the I/O functions.
* Return an LDAP error code (LDAP_SUCCESS if all goes well).
*/
int
nsldapi_install_compat_io_fns( LDAP *ld, struct ldap_io_fns *iofns )
{
NSLDAPICompatSocketInfo *defcsip;
if (( defcsip = (NSLDAPICompatSocketInfo *)NSLDAPI_CALLOC( 1,
sizeof( NSLDAPICompatSocketInfo ))) == NULL ) {
return( LDAP_NO_MEMORY );
}
defcsip->csi_socket = -1;
defcsip->csi_ld = ld;
if ( ld->ld_io_fns_ptr != NULL ) {
(void)memset( (char *)ld->ld_io_fns_ptr, 0,
sizeof( struct ldap_io_fns ));
} else if (( ld->ld_io_fns_ptr = (struct ldap_io_fns *)NSLDAPI_CALLOC(
1, sizeof( struct ldap_io_fns ))) == NULL ) {
NSLDAPI_FREE( defcsip );
return( LDAP_NO_MEMORY );
}
/* struct copy */
*(ld->ld_io_fns_ptr) = *iofns;
ld->ld_extio_size = LBER_X_EXTIO_FNS_SIZE;
ld->ld_ext_session_arg = defcsip;
ld->ld_extread_fn = nsldapi_ext_compat_read;
ld->ld_extwrite_fn = nsldapi_ext_compat_write;
ld->ld_extpoll_fn = nsldapi_ext_compat_poll;
ld->ld_extconnect_fn = nsldapi_ext_compat_connect;
ld->ld_extclose_fn = nsldapi_ext_compat_close;
return( nsldapi_install_lber_extiofns( ld, ld->ld_sbp ));
}
/*
* end of compat I/O functions
******************************************************************************
*/
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