freebsd-src/lib/libc/xdr/xdr_mem.c
Warner Losh dc36d6f9bb lib: Remove ancient SCCS tags.
Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by:		Netflix
2023-11-26 22:23:28 -07:00

230 lines
6 KiB
C

/* $NetBSD: xdr_mem.c,v 1.15 2000/01/22 22:19:18 mycroft Exp $ */
/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* 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.
*/
/*
* xdr_mem.h, XDR implementation using memory buffers.
*
* If you have some data to be interpreted as external data representation
* or to be converted to external data representation in a memory buffer,
* then this is the package for you.
*
*/
#include "namespace.h"
#include <sys/types.h>
#include <netinet/in.h>
#include <string.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
#include "un-namespace.h"
static void xdrmem_destroy(XDR *);
static bool_t xdrmem_getlong_aligned(XDR *, long *);
static bool_t xdrmem_putlong_aligned(XDR *, const long *);
static bool_t xdrmem_getlong_unaligned(XDR *, long *);
static bool_t xdrmem_putlong_unaligned(XDR *, const long *);
static bool_t xdrmem_getbytes(XDR *, char *, u_int);
static bool_t xdrmem_putbytes(XDR *, const char *, u_int);
/* XXX: w/64-bit pointers, u_int not enough! */
static u_int xdrmem_getpos(XDR *);
static bool_t xdrmem_setpos(XDR *, u_int);
static int32_t *xdrmem_inline_aligned(XDR *, u_int);
static int32_t *xdrmem_inline_unaligned(XDR *, u_int);
static const struct xdr_ops xdrmem_ops_aligned = {
xdrmem_getlong_aligned,
xdrmem_putlong_aligned,
xdrmem_getbytes,
xdrmem_putbytes,
xdrmem_getpos,
xdrmem_setpos,
xdrmem_inline_aligned,
xdrmem_destroy
};
static const struct xdr_ops xdrmem_ops_unaligned = {
xdrmem_getlong_unaligned,
xdrmem_putlong_unaligned,
xdrmem_getbytes,
xdrmem_putbytes,
xdrmem_getpos,
xdrmem_setpos,
xdrmem_inline_unaligned,
xdrmem_destroy
};
/*
* The procedure xdrmem_create initializes a stream descriptor for a
* memory buffer.
*/
void
xdrmem_create(XDR *xdrs, char *addr, u_int size, enum xdr_op op)
{
xdrs->x_op = op;
xdrs->x_ops = ((unsigned long)addr & (sizeof(int32_t) - 1))
? &xdrmem_ops_unaligned : &xdrmem_ops_aligned;
xdrs->x_private = xdrs->x_base = addr;
xdrs->x_handy = size;
}
/*ARGSUSED*/
static void
xdrmem_destroy(XDR *xdrs)
{
}
static bool_t
xdrmem_getlong_aligned(XDR *xdrs, long *lp)
{
if (xdrs->x_handy < sizeof(int32_t))
return (FALSE);
xdrs->x_handy -= sizeof(int32_t);
*lp = ntohl(*(u_int32_t *)xdrs->x_private);
xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t);
return (TRUE);
}
static bool_t
xdrmem_putlong_aligned(XDR *xdrs, const long *lp)
{
if (xdrs->x_handy < sizeof(int32_t))
return (FALSE);
xdrs->x_handy -= sizeof(int32_t);
*(u_int32_t *)xdrs->x_private = htonl((u_int32_t)*lp);
xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t);
return (TRUE);
}
static bool_t
xdrmem_getlong_unaligned(XDR *xdrs, long *lp)
{
u_int32_t l;
if (xdrs->x_handy < sizeof(int32_t))
return (FALSE);
xdrs->x_handy -= sizeof(int32_t);
memmove(&l, xdrs->x_private, sizeof(int32_t));
*lp = ntohl(l);
xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t);
return (TRUE);
}
static bool_t
xdrmem_putlong_unaligned(XDR *xdrs, const long *lp)
{
u_int32_t l;
if (xdrs->x_handy < sizeof(int32_t))
return (FALSE);
xdrs->x_handy -= sizeof(int32_t);
l = htonl((u_int32_t)*lp);
memmove(xdrs->x_private, &l, sizeof(int32_t));
xdrs->x_private = (char *)xdrs->x_private + sizeof(int32_t);
return (TRUE);
}
static bool_t
xdrmem_getbytes(XDR *xdrs, char *addr, u_int len)
{
if (xdrs->x_handy < len)
return (FALSE);
xdrs->x_handy -= len;
memmove(addr, xdrs->x_private, len);
xdrs->x_private = (char *)xdrs->x_private + len;
return (TRUE);
}
static bool_t
xdrmem_putbytes(XDR *xdrs, const char *addr, u_int len)
{
if (xdrs->x_handy < len)
return (FALSE);
xdrs->x_handy -= len;
memmove(xdrs->x_private, addr, len);
xdrs->x_private = (char *)xdrs->x_private + len;
return (TRUE);
}
static u_int
xdrmem_getpos(XDR *xdrs)
{
/* XXX w/64-bit pointers, u_int not enough! */
return (u_int)((u_long)xdrs->x_private - (u_long)xdrs->x_base);
}
static bool_t
xdrmem_setpos(XDR *xdrs, u_int pos)
{
char *newaddr = xdrs->x_base + pos;
char *lastaddr = (char *)xdrs->x_private + xdrs->x_handy;
if (newaddr > lastaddr)
return (FALSE);
xdrs->x_private = newaddr;
xdrs->x_handy = (u_int)(lastaddr - newaddr); /* XXX sizeof(u_int) <? sizeof(ptrdiff_t) */
return (TRUE);
}
static int32_t *
xdrmem_inline_aligned(XDR *xdrs, u_int len)
{
int32_t *buf = NULL;
if (xdrs->x_handy >= len) {
xdrs->x_handy -= len;
buf = (int32_t *)xdrs->x_private;
xdrs->x_private = (char *)xdrs->x_private + len;
}
return (buf);
}
/* ARGSUSED */
static int32_t *
xdrmem_inline_unaligned(XDR *xdrs, u_int len)
{
return (0);
}