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/*
* Copyright (c) 2009, Sun Microsystems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of Sun Microsystems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* xdr_stdio.c, XDR implementation on standard i/o file.
*
* Copyright (C) 1984, Sun Microsystems, Inc.
*
* This set of routines implements a XDR on a stdio stream.
* XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes
* from the stream.
*/
#include <stdio.h>
#include <stdint.h>
#include <arpa/inet.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
#include "un-namespace.h"
static void xdrstdio_destroy(XDR *);
static bool_t xdrstdio_getlong(XDR *, long *);
static bool_t xdrstdio_putlong(XDR *, const long *);
static bool_t xdrstdio_getbytes(XDR *, char *, u_int);
static bool_t xdrstdio_putbytes(XDR *, const char *, u_int);
static u_int xdrstdio_getpos(XDR *);
static bool_t xdrstdio_setpos(XDR *, u_int);
static int32_t *xdrstdio_inline(XDR *, u_int);
/*
* Ops vector for stdio type XDR
*/
static const struct xdr_ops xdrstdio_ops = {
xdrstdio_getlong, /* deseraialize a long int */
xdrstdio_putlong, /* seraialize a long int */
xdrstdio_getbytes, /* deserialize counted bytes */
xdrstdio_putbytes, /* serialize counted bytes */
xdrstdio_getpos, /* get offset in the stream */
xdrstdio_setpos, /* set offset in the stream */
xdrstdio_inline, /* prime stream for inline macros */
xdrstdio_destroy /* destroy stream */
};
/*
* Initialize a stdio xdr stream.
* Sets the xdr stream handle xdrs for use on the stream file.
* Operation flag is set to op.
*/
void
xdrstdio_create(xdrs, file, op)
XDR *xdrs;
FILE *file;
enum xdr_op op;
{
xdrs->x_op = op;
xdrs->x_ops = &xdrstdio_ops;
xdrs->x_private = file;
xdrs->x_handy = 0;
xdrs->x_base = 0;
}
/*
* Destroy a stdio xdr stream.
* Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create.
*/
static void
xdrstdio_destroy(xdrs)
XDR *xdrs;
{
(void)fflush((FILE *)xdrs->x_private);
/* XXX: should we close the file ?? */
}
static bool_t
xdrstdio_getlong(xdrs, lp)
XDR *xdrs;
long *lp;
{
int32_t mycopy;
if (fread(&mycopy, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1)
return (FALSE);
*lp = (long)ntohl(mycopy);
return (TRUE);
}
static bool_t
xdrstdio_putlong(xdrs, lp)
XDR *xdrs;
const long *lp;
{
int32_t mycopy;
#if defined(_LP64)
if ((*lp > UINT32_MAX) || (*lp < INT32_MIN))
return (FALSE);
#endif
mycopy = (int32_t)htonl((int32_t)*lp);
if (fwrite(&mycopy, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1)
return (FALSE);
return (TRUE);
}
static bool_t
xdrstdio_getbytes(xdrs, addr, len)
XDR *xdrs;
char *addr;
u_int len;
{
if ((len != 0) && (fread(addr, (size_t)len, 1, (FILE *)xdrs->x_private) != 1))
return (FALSE);
return (TRUE);
}
static bool_t
xdrstdio_putbytes(xdrs, addr, len)
XDR *xdrs;
const char *addr;
u_int len;
{
if ((len != 0) && (fwrite(addr, (size_t)len, 1,
(FILE *)xdrs->x_private) != 1))
return (FALSE);
return (TRUE);
}
static u_int
xdrstdio_getpos(xdrs)
XDR *xdrs;
{
return ((u_int) ftell((FILE *)xdrs->x_private));
}
static bool_t
xdrstdio_setpos(xdrs, pos)
XDR *xdrs;
u_int pos;
{
return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ?
FALSE : TRUE);
}
/* ARGSUSED */
static int32_t *
xdrstdio_inline(xdrs, len)
XDR *xdrs;
u_int len;
{
/*
* Must do some work to implement this: must insure
* enough data in the underlying stdio buffer,
* that the buffer is aligned so that we can indirect through a
* long *, and stuff this pointer in xdrs->x_buf. Doing
* a fread or fwrite to a scratch buffer would defeat
* most of the gains to be had here and require storage
* management on this buffer, so we don't do this.
*/
return (NULL);
}
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