160 lines
4.3 KiB
C
160 lines
4.3 KiB
C
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/*
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* Copyright (c) 2009, Sun Microsystems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of Sun Microsystems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* xdr_array.c, Generic XDR routines impelmentation.
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*
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* Copyright (C) 1984, Sun Microsystems, Inc.
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*
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* These are the "non-trivial" xdr primitives used to serialize and de-serialize
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* arrays. See xdr.h for more info on the interface to xdr.
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*/
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#include <limits.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <rpc/types.h>
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#include <rpc/xdr.h>
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#include "xdr_private.h"
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/*
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* XDR an array of arbitrary elements
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* *addrp is a pointer to the array, *sizep is the number of elements.
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* If addrp is NULL (*sizep * elsize) bytes are allocated.
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* elsize is the size (in bytes) of each element, and elproc is the
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* xdr procedure to call to handle each element of the array.
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*/
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bool_t
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xdr_array (XDR * xdrs,
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caddr_t * addrp,
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u_int * sizep,
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u_int maxsize,
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u_int elsize,
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xdrproc_t elproc)
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{
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u_int i;
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caddr_t target = *addrp;
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u_int c; /* the actual element count */
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bool_t stat = TRUE;
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u_int nodesize;
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/* like strings, arrays are really counted arrays */
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if (!xdr_u_int (xdrs, sizep))
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{
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return FALSE;
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}
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c = *sizep;
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if ((c > maxsize || UINT_MAX / elsize < c) && (xdrs->x_op != XDR_FREE))
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{
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return FALSE;
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}
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nodesize = c * elsize;
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/*
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* if we are deserializing, we may need to allocate an array.
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* We also save time by checking for a null array if we are freeing.
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*/
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if (target == NULL)
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switch (xdrs->x_op)
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{
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case XDR_DECODE:
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if (c == 0)
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return TRUE;
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*addrp = target = mem_alloc (nodesize);
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if (target == NULL)
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{
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xdr_warnx ("xdr_array: out of memory");
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errno = ENOMEM;
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return FALSE;
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}
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memset (target, 0, nodesize);
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break;
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case XDR_FREE:
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return TRUE;
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case XDR_ENCODE:
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break;
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}
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/*
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* now we xdr each element of array
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*/
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for (i = 0; (i < c) && stat; i++)
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{
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stat = (*elproc) (xdrs, target);
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target += elsize;
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}
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/*
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* the array may need freeing
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*/
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if (xdrs->x_op == XDR_FREE)
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{
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mem_free (*addrp, nodesize);
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*addrp = NULL;
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}
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return (stat);
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}
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/*
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* xdr_vector():
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*
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* XDR a fixed length array. Unlike variable-length arrays,
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* the storage of fixed length arrays is static and unfreeable.
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* > basep: base of the array
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* > size: size of the array
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* > elemsize: size of each element
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* > xdr_elem: routine to XDR each element
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*/
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bool_t
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xdr_vector (XDR * xdrs,
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char *basep,
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u_int nelem,
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u_int elemsize,
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xdrproc_t xdr_elem)
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{
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u_int i;
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char *elptr;
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elptr = basep;
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for (i = 0; i < nelem; i++)
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{
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if (!(*xdr_elem) (xdrs, elptr))
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{
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return FALSE;
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}
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elptr += elemsize;
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}
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return TRUE;
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}
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