8a16b7a18f
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237 lines
6.2 KiB
C
237 lines
6.2 KiB
C
/* $NetBSD: xdr_mem.c,v 1.15 2000/01/22 22:19:18 mycroft Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2010, Oracle America, Inc.
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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
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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* * Neither the name of the "Oracle America, 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
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char *sccsid2 = "@(#)xdr_mem.c 1.19 87/08/11 Copyr 1984 Sun Micro";
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static char *sccsid = "@(#)xdr_mem.c 2.1 88/07/29 4.0 RPCSRC";
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* xdr_mem.h, XDR implementation using memory buffers.
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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 "namespace.h"
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <string.h>
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#include <rpc/types.h>
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#include <rpc/xdr.h>
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#include "un-namespace.h"
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static void xdrmem_destroy(XDR *);
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static bool_t xdrmem_getlong_aligned(XDR *, long *);
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static bool_t xdrmem_putlong_aligned(XDR *, const long *);
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static bool_t xdrmem_getlong_unaligned(XDR *, long *);
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static bool_t xdrmem_putlong_unaligned(XDR *, const long *);
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static bool_t xdrmem_getbytes(XDR *, char *, u_int);
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static bool_t 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 xdrmem_getpos(XDR *);
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static bool_t xdrmem_setpos(XDR *, u_int);
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static int32_t *xdrmem_inline_aligned(XDR *, u_int);
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static int32_t *xdrmem_inline_unaligned(XDR *, u_int);
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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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};
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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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};
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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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xdrmem_create(XDR *xdrs, char *addr, u_int size, 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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? &xdrmem_ops_unaligned : &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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/*ARGSUSED*/
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static void
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xdrmem_destroy(XDR *xdrs)
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{
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}
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static bool_t
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xdrmem_getlong_aligned(XDR *xdrs, 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 = 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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xdrmem_putlong_aligned(XDR *xdrs, 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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xdrmem_getlong_unaligned(XDR *xdrs, 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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xdrmem_putlong_unaligned(XDR *xdrs, 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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xdrmem_getbytes(XDR *xdrs, char *addr, 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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xdrmem_putbytes(XDR *xdrs, const char *addr, 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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xdrmem_getpos(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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xdrmem_setpos(XDR *xdrs, u_int pos)
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{
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char *newaddr = xdrs->x_base + pos;
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char *lastaddr = (char *)xdrs->x_private + xdrs->x_handy;
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if (newaddr > lastaddr)
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return (FALSE);
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xdrs->x_private = newaddr;
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xdrs->x_handy = (u_int)(lastaddr - newaddr); /* 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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xdrmem_inline_aligned(XDR *xdrs, u_int len)
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{
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int32_t *buf = NULL;
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if (xdrs->x_handy >= len) {
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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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/* ARGSUSED */
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static int32_t *
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xdrmem_inline_unaligned(XDR *xdrs, u_int len)
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{
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return (0);
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}
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