320 lines
8.5 KiB
C
320 lines
8.5 KiB
C
/*
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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_mem.h, XDR implementation using memory buffers.
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*
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* Copyright (C) 1984, Sun Microsystems, Inc.
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*
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* If you have some data to be interpreted as external data representation
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* or to be converted to external data representation in a memory buffer,
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* then this is the package for you.
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*
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*/
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#include <sys/types.h>
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#include <string.h>
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#include <limits.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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#ifndef ntohl
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# define ntohl(x) xdr_ntohl(x)
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#endif
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#ifndef htonl
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# define htonl(x) xdr_htonl(x)
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#endif
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static void _EXFUN (xdrmem_destroy, (XDR *));
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static bool_t _EXFUN (xdrmem_getlong_aligned, (XDR *, long *));
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static bool_t _EXFUN (xdrmem_putlong_aligned, (XDR *, _CONST long *));
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static bool_t _EXFUN (xdrmem_getlong_unaligned, (XDR *, long *));
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static bool_t _EXFUN (xdrmem_putlong_unaligned, (XDR *, _CONST long *));
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static bool_t _EXFUN (xdrmem_getbytes, (XDR *, char *, u_int));
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static bool_t _EXFUN (xdrmem_putbytes, (XDR *, _CONST char *, u_int));
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/* XXX: w/64-bit pointers, u_int not enough! */
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static u_int _EXFUN (xdrmem_getpos, (XDR *));
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static bool_t _EXFUN (xdrmem_setpos, (XDR *, u_int));
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static int32_t * _EXFUN (xdrmem_inline_aligned, (XDR *, u_int));
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static int32_t * _EXFUN (xdrmem_inline_unaligned, (XDR *, u_int));
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static bool_t _EXFUN (xdrmem_getint32_aligned, (XDR *, int32_t *));
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static bool_t _EXFUN (xdrmem_putint32_aligned, (XDR *, _CONST int32_t *));
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static bool_t _EXFUN (xdrmem_getint32_unaligned, (XDR *, int32_t *));
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static bool_t _EXFUN (xdrmem_putint32_unaligned, (XDR *, _CONST int32_t *));
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static _CONST struct xdr_ops xdrmem_ops_aligned = {
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xdrmem_getlong_aligned,
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xdrmem_putlong_aligned,
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xdrmem_getbytes,
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xdrmem_putbytes,
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xdrmem_getpos,
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xdrmem_setpos,
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xdrmem_inline_aligned,
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xdrmem_destroy,
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xdrmem_getint32_aligned,
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xdrmem_putint32_aligned
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};
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static _CONST struct xdr_ops xdrmem_ops_unaligned = {
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xdrmem_getlong_unaligned,
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xdrmem_putlong_unaligned,
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xdrmem_getbytes,
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xdrmem_putbytes,
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xdrmem_getpos,
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xdrmem_setpos,
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xdrmem_inline_unaligned,
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xdrmem_destroy,
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xdrmem_getint32_unaligned,
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xdrmem_putint32_unaligned
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};
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/*
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* The procedure xdrmem_create initializes a stream descriptor for a
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* memory buffer.
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*/
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void
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_DEFUN (xdrmem_create, (xdrs, addr, size, op),
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XDR * xdrs,
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caddr_t addr,
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u_int size,
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enum xdr_op op)
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{
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xdrs->x_op = op;
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xdrs->x_ops = ((unsigned long)addr & (sizeof (int32_t) - 1))
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? (struct xdr_ops *)&xdrmem_ops_unaligned
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: (struct xdr_ops *)&xdrmem_ops_aligned;
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xdrs->x_private = xdrs->x_base = addr;
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xdrs->x_handy = size;
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}
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static void
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_DEFUN (xdrmem_destroy, (xdrs),
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XDR * xdrs)
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{
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}
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static bool_t
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_DEFUN (xdrmem_getlong_aligned, (xdrs, lp),
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XDR * xdrs,
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long *lp)
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{
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if (xdrs->x_handy < sizeof (int32_t))
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return FALSE;
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xdrs->x_handy -= sizeof (int32_t);
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*lp = (int32_t) ntohl (*(u_int32_t *) xdrs->x_private);
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xdrs->x_private = (char *) xdrs->x_private + sizeof (int32_t);
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return TRUE;
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}
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static bool_t
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_DEFUN (xdrmem_putlong_aligned, (xdrs, lp),
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XDR * xdrs,
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_CONST long *lp)
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{
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if (xdrs->x_handy < sizeof (int32_t))
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return FALSE;
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xdrs->x_handy -= sizeof (int32_t);
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*(u_int32_t *) xdrs->x_private = htonl ((u_int32_t) * lp);
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xdrs->x_private = (char *) xdrs->x_private + sizeof (int32_t);
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return TRUE;
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}
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static bool_t
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_DEFUN (xdrmem_getlong_unaligned, (xdrs, lp),
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XDR * xdrs,
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long *lp)
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{
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u_int32_t l;
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if (xdrs->x_handy < sizeof (int32_t))
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return FALSE;
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xdrs->x_handy -= sizeof (int32_t);
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memmove (&l, xdrs->x_private, sizeof (int32_t));
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*lp = ntohl (l);
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xdrs->x_private = (char *) xdrs->x_private + sizeof (int32_t);
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return TRUE;
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}
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static bool_t
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_DEFUN (xdrmem_putlong_unaligned, (xdrs, lp),
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XDR * xdrs,
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_CONST long *lp)
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{
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u_int32_t l;
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if (xdrs->x_handy < sizeof (int32_t))
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return FALSE;
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xdrs->x_handy -= sizeof (int32_t);
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l = htonl ((u_int32_t) * lp);
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memmove (xdrs->x_private, &l, sizeof (int32_t));
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xdrs->x_private = (char *) xdrs->x_private + sizeof (int32_t);
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return TRUE;
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}
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static bool_t
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_DEFUN (xdrmem_getbytes, (xdrs, addr, len),
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XDR * xdrs,
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char *addr,
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u_int len)
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{
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if (xdrs->x_handy < len)
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return FALSE;
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xdrs->x_handy -= len;
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memmove (addr, xdrs->x_private, len);
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xdrs->x_private = (char *) xdrs->x_private + len;
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return TRUE;
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}
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static bool_t
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_DEFUN (xdrmem_putbytes, (xdrs, addr, len),
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XDR * xdrs,
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_CONST char *addr,
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u_int len)
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{
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if (xdrs->x_handy < len)
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return FALSE;
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xdrs->x_handy -= len;
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memmove (xdrs->x_private, addr, len);
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xdrs->x_private = (char *) xdrs->x_private + len;
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return TRUE;
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}
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static u_int
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_DEFUN (xdrmem_getpos, (xdrs),
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XDR * xdrs)
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{
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/* XXX w/64-bit pointers, u_int not enough! */
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return (u_int) ((u_long) xdrs->x_private - (u_long) xdrs->x_base);
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}
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static bool_t
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_DEFUN (xdrmem_setpos, (xdrs, pos),
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XDR * xdrs,
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u_int pos)
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{
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caddr_t newaddr = xdrs->x_base + pos;
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caddr_t lastaddr = (caddr_t) xdrs->x_private + xdrs->x_handy;
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size_t handy = lastaddr - newaddr;
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if (newaddr > lastaddr
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|| newaddr < xdrs->x_base
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|| handy != (u_int) handy)
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return FALSE;
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xdrs->x_private = newaddr;
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xdrs->x_handy = (u_int) handy;
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/* XXX sizeof(u_int) <? sizeof(ptrdiff_t) */
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return TRUE;
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}
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static int32_t *
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_DEFUN (xdrmem_inline_aligned, (xdrs, len),
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XDR * xdrs,
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u_int len)
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{
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int32_t *buf = 0;
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if (xdrs->x_handy >= len)
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{
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xdrs->x_handy -= len;
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buf = (int32_t *) xdrs->x_private;
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xdrs->x_private = (char *) xdrs->x_private + len;
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}
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return (buf);
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}
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static int32_t *
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_DEFUN (xdrmem_inline_unaligned, (xdrs, len),
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XDR * xdrs,
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u_int len)
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{
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return (0);
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}
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static bool_t
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_DEFUN (xdrmem_getint32_aligned, (xdrs, ip),
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XDR *xdrs,
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int32_t *ip)
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{
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if (xdrs->x_handy < sizeof(int32_t))
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return FALSE;
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xdrs->x_handy -= sizeof(int32_t);
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*ip = (int32_t) ntohl (*(u_int32_t *) xdrs->x_private);
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xdrs->x_private = (char *) xdrs->x_private + sizeof (int32_t);
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return TRUE;
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}
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static bool_t
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_DEFUN (xdrmem_putint32_aligned, (xdrs, ip),
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XDR *xdrs,
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_CONST int32_t *ip)
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{
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if (xdrs->x_handy < sizeof(int32_t))
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return FALSE;
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xdrs->x_handy -= sizeof(int32_t);
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*(u_int32_t *) xdrs->x_private = htonl ((u_int32_t) * ip);
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xdrs->x_private = (char *) xdrs->x_private + sizeof (int32_t);
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return TRUE;
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}
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static bool_t
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_DEFUN (xdrmem_getint32_unaligned, (xdrs, ip),
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XDR *xdrs,
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int32_t *ip)
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{
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u_int32_t l;
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if (xdrs->x_handy < sizeof(int32_t))
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return FALSE;
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xdrs->x_handy -= sizeof(int32_t);
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memmove (&l, xdrs->x_private, sizeof (int32_t));
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*ip = (int32_t) ntohl (l);
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xdrs->x_private = (char *) xdrs->x_private + sizeof (int32_t);
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return TRUE;
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}
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static bool_t
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_DEFUN (xdrmem_putint32_unaligned, (xdrs, ip),
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XDR *xdrs,
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_CONST int32_t *ip)
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{
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u_int32_t l;
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if (xdrs->x_handy < sizeof(int32_t))
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return FALSE;
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xdrs->x_handy -= sizeof(int32_t);
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l = htonl ((u_int32_t) * ip);
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memmove (xdrs->x_private, &l, sizeof (int32_t));
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xdrs->x_private = (char *) xdrs->x_private + sizeof (int32_t);
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return TRUE;
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}
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