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/*
* xdr_array.c, Generic XDR routines implementation.
*
* Copyright (c) 2010, Oracle America, Inc.
*
* 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 the "Oracle America, 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.
*
* These are the "non-trivial" xdr primitives used to serialize and
* de-serialize arrays. See xdr.h for more info on the interface to xdr.
*/
#include <stdio.h>
#include <string.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
#include <libintl.h>
#include <limits.h>
#ifdef USE_IN_LIBIO
# include <wchar.h>
#endif
#define LASTUNSIGNED ((u_int)0-1)
/*
* XDR an array of arbitrary elements
* *addrp is a pointer to the array, *sizep is the number of elements.
* If addrp is NULL (*sizep * elsize) bytes are allocated.
* elsize is the size (in bytes) of each element, and elproc is the
* xdr procedure to call to handle each element of the array.
*/
bool_t
xdr_array (xdrs, addrp, sizep, maxsize, elsize, elproc)
XDR *xdrs;
caddr_t *addrp; /* array pointer */
u_int *sizep; /* number of elements */
u_int maxsize; /* max numberof elements */
u_int elsize; /* size in bytes of each element */
xdrproc_t elproc; /* xdr routine to handle each element */
{
u_int i;
caddr_t target = *addrp;
u_int c; /* the actual element count */
bool_t stat = TRUE;
/* like strings, arrays are really counted arrays */
if (!INTUSE(xdr_u_int) (xdrs, sizep))
{
return FALSE;
}
c = *sizep;
/*
* XXX: Let the overflow possibly happen with XDR_FREE because mem_free()
* doesn't actually use its second argument anyway.
*/
if ((c > maxsize || c > UINT_MAX / elsize) && (xdrs->x_op != XDR_FREE))
{
return FALSE;
}
/*
* if we are deserializing, we may need to allocate an array.
* We also save time by checking for a null array if we are freeing.
*/
if (target == NULL)
switch (xdrs->x_op)
{
case XDR_DECODE:
if (c == 0)
return TRUE;
*addrp = target = calloc (c, elsize);
if (target == NULL)
{
(void) __fxprintf (NULL, "%s: %s", __func__, _("out of memory\n"));
return FALSE;
}
break;
case XDR_FREE:
return TRUE;
default:
break;
}
/*
* now we xdr each element of array
*/
for (i = 0; (i < c) && stat; i++)
{
stat = (*elproc) (xdrs, target, LASTUNSIGNED);
target += elsize;
}
/*
* the array may need freeing
*/
if (xdrs->x_op == XDR_FREE)
{
mem_free (*addrp, c * elsize);
*addrp = NULL;
}
return stat;
}
INTDEF(xdr_array)
/*
* xdr_vector():
*
* XDR a fixed length array. Unlike variable-length arrays,
* the storage of fixed length arrays is static and unfreeable.
* > basep: base of the array
* > size: size of the array
* > elemsize: size of each element
* > xdr_elem: routine to XDR each element
*/
bool_t
xdr_vector (xdrs, basep, nelem, elemsize, xdr_elem)
XDR *xdrs;
char *basep;
u_int nelem;
u_int elemsize;
xdrproc_t xdr_elem;
{
u_int i;
char *elptr;
elptr = basep;
for (i = 0; i < nelem; i++)
{
if (!(*xdr_elem) (xdrs, elptr, LASTUNSIGNED))
{
return FALSE;
}
elptr += elemsize;
}
return TRUE;
}
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