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/* @(#)xdr_mem.c 2.1 88/07/29 4.0 RPCSRC */
/*
* Copyright (c) 2010, Oracle America, Inc.
*
* All rights reserved.
*
* 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.
*/
#if !defined(lint) && defined(SCCSIDS)
static char sccsid[] = "@(#)xdr_mem.c 1.19 87/08/11 Copyr 1984 Sun Micro";
#endif
/*
* 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 <gssrpc/types.h>
#include <gssrpc/xdr.h>
#include <netinet/in.h>
#include <stdio.h>
#include <string.h>
#include <limits.h>
static bool_t xdrmem_getlong(XDR *, long *);
static bool_t xdrmem_putlong(XDR *, long *);
static bool_t xdrmem_getbytes(XDR *, caddr_t, u_int);
static bool_t xdrmem_putbytes(XDR *, caddr_t, u_int);
static u_int xdrmem_getpos(XDR *);
static bool_t xdrmem_setpos(XDR *, u_int);
static rpc_inline_t * xdrmem_inline(XDR *, int);
static void xdrmem_destroy(XDR *);
static struct xdr_ops xdrmem_ops = {
xdrmem_getlong,
xdrmem_putlong,
xdrmem_getbytes,
xdrmem_putbytes,
xdrmem_getpos,
xdrmem_setpos,
xdrmem_inline,
xdrmem_destroy
};
/*
* The procedure xdrmem_create initializes a stream descriptor for a
* memory buffer.
*/
void
xdrmem_create(
XDR *xdrs,
caddr_t addr,
u_int size,
enum xdr_op op)
{
xdrs->x_op = op;
xdrs->x_ops = &xdrmem_ops;
xdrs->x_private = xdrs->x_base = addr;
xdrs->x_handy = (size > INT_MAX) ? INT_MAX : size; /* XXX */
}
static void
xdrmem_destroy(XDR *xdrs)
{
}
static bool_t
xdrmem_getlong(XDR *xdrs, long *lp)
{
if (xdrs->x_handy < BYTES_PER_XDR_UNIT)
return (FALSE);
else
xdrs->x_handy -= BYTES_PER_XDR_UNIT;
*lp = (long)(int32_t)ntohl(*((uint32_t *)(xdrs->x_private)));
xdrs->x_private = (char *)xdrs->x_private + BYTES_PER_XDR_UNIT;
return (TRUE);
}
static bool_t
xdrmem_putlong(XDR *xdrs, long *lp)
{
if (xdrs->x_handy < BYTES_PER_XDR_UNIT)
return (FALSE);
else
xdrs->x_handy -= BYTES_PER_XDR_UNIT;
*(int32_t *)xdrs->x_private = (int32_t)htonl((uint32_t)(*lp));
xdrs->x_private = (char *)xdrs->x_private + BYTES_PER_XDR_UNIT;
return (TRUE);
}
static bool_t
xdrmem_getbytes(XDR *xdrs, caddr_t addr, u_int len)
{
if ((u_int)xdrs->x_handy < len)
return (FALSE);
else
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, caddr_t addr, u_int len)
{
if ((u_int)xdrs->x_handy < len)
return (FALSE);
else
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)
{
/*
* 11/3/95 - JRG - Rather than recast everything for 64 bit, just convert
* pointers to longs, then cast to int.
*/
return (u_int)((u_long)xdrs->x_private - (u_long)xdrs->x_base);
}
static bool_t
xdrmem_setpos(XDR *xdrs, u_int pos)
{
register caddr_t newaddr = xdrs->x_base + pos;
register caddr_t lastaddr = (char *) xdrs->x_private + xdrs->x_handy;
if ((long)newaddr > (long)lastaddr)
return (FALSE);
xdrs->x_private = newaddr;
xdrs->x_handy = (int)((long)lastaddr - (long)newaddr);
return (TRUE);
}
static rpc_inline_t *
xdrmem_inline(XDR *xdrs, int len)
{
rpc_inline_t *buf = 0;
if (len >= 0 && xdrs->x_handy >= len) {
xdrs->x_handy -= len;
buf = (rpc_inline_t *) xdrs->x_private;
xdrs->x_private = (char *)xdrs->x_private + len;
}
return (buf);
}
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