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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Portions of this source code were derived from Berkeley
* 4.3 BSD under license from the Regents of the University of
* California.
*/
/*
* Generic XDR routines impelmentation.
*
* 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 "mt.h"
#include <sys/types.h>
#include <syslog.h>
#include <stdio.h>
#include <stdlib.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
#include <memory.h>
#define LASTUNSIGNED ((uint_t)0-1)
char mem_err_msg_arr[] = "xdr_array: out of memory";
/*
* 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(XDR *xdrs, caddr_t *addrp, uint_t *sizep, const uint_t maxsize,
const uint_t elsize, const xdrproc_t elproc)
{
uint_t i;
caddr_t target = *addrp;
uint_t c; /* the actual element count */
bool_t stat = TRUE;
uint_t nodesize;
/* like strings, arrays are really counted arrays */
if (!xdr_u_int(xdrs, sizep))
return (FALSE);
c = *sizep;
if ((c > maxsize || LASTUNSIGNED / elsize < c) &&
xdrs->x_op != XDR_FREE)
return (FALSE);
nodesize = c * elsize;
/*
* 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 = malloc(nodesize);
if (target == NULL) {
(void) syslog(LOG_ERR, mem_err_msg_arr);
return (FALSE);
}
(void) memset(target, 0, nodesize);
break;
case XDR_FREE:
return (TRUE);
}
/*
* now we xdr each element of array
*/
for (i = 0; (i < c) && stat; i++) {
stat = (*elproc)(xdrs, target);
target += elsize;
}
/*
* the array may need freeing
*/
if (xdrs->x_op == XDR_FREE) {
free(*addrp);
*addrp = NULL;
}
return (stat);
}
/*
* 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(XDR *xdrs, char *basep, const uint_t nelem,
const uint_t elemsize, const xdrproc_t xdr_elem)
{
uint_t i;
char *elptr;
/* Make sure x_op contains a valid value */
if (xdrs->x_op != XDR_ENCODE &&
xdrs->x_op != XDR_DECODE &&
xdrs->x_op != XDR_FREE)
return (FALSE);
elptr = basep;
for (i = 0; i < nelem; i++) {
if (!(*xdr_elem)(xdrs, elptr, LASTUNSIGNED))
return (FALSE);
elptr += elemsize;
}
return (TRUE);
}
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