xref: /titanic_52/usr/src/uts/common/rpc/rpcb_prot.c (revision 1fd2cb30ed9441dcd42f7250881c1f8d075723a9)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
/*	  All Rights Reserved  	*/

/*
 * Portions of this source code were derived from Berkeley 4.3 BSD
 * under license from the Regents of the University of California.
 */

/*
 * rpcb_prot.c
 * XDR routines for the rpcbinder version 3.
 */

#include <rpc/rpc.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
#include <rpc/rpcb_prot.h>


bool_t
xdr_rpcb(XDR *xdrs, RPCB *objp)
{
	if (!xdr_rpcprog(xdrs, &objp->r_prog))
		return (FALSE);
	if (!xdr_rpcvers(xdrs, &objp->r_vers))
		return (FALSE);
	if (!xdr_string(xdrs, &objp->r_netid, ~0))
		return (FALSE);
	if (!xdr_string(xdrs, &objp->r_addr, ~0))
		return (FALSE);
	if (!xdr_string(xdrs, &objp->r_owner, ~0))
		return (FALSE);
	return (TRUE);
}

/*
 * XDR remote call arguments
 * written for XDR_ENCODE direction only
 */
bool_t
xdr_rpcb_rmtcallargs(XDR *xdrs, struct rpcb_rmtcallargs *objp)
{
	uint_t lenposition, argposition, position;

	if (!xdr_rpcprog(xdrs, &objp->prog))
		return (FALSE);
	if (!xdr_rpcvers(xdrs, &objp->vers))
		return (FALSE);
	if (!xdr_rpcproc(xdrs, &objp->proc))
		return (FALSE);
	/*
	 * All the jugglery for just getting the size of the arguments
	 */
	lenposition = XDR_GETPOS(xdrs);
	if (!xdr_u_int(xdrs, &(objp->arglen)))
		return (FALSE);
	argposition = XDR_GETPOS(xdrs);
	if (!(*(objp->xdr_args))(xdrs, objp->args_ptr))
		return (FALSE);
	position = XDR_GETPOS(xdrs);
	objp->arglen = position - argposition;
	XDR_SETPOS(xdrs, lenposition);
	if (!xdr_u_int(xdrs, &(objp->arglen)))
		return (FALSE);
	XDR_SETPOS(xdrs, position);
	return (TRUE);
}

/*
 * XDR remote call results
 * written for XDR_DECODE direction only
 */
bool_t
xdr_rpcb_rmtcallres(XDR *xdrs, struct rpcb_rmtcallres *objp)
{
	if (!xdr_string(xdrs, &objp->addr_ptr, ~0))
		return (FALSE);
	if (!xdr_u_int(xdrs, &objp->resultslen))
		return (FALSE);
	return ((*(objp->xdr_results))(xdrs, objp->results_ptr));
}

bool_t
xdr_netbuf(XDR *xdrs, struct netbuf *objp)
{
	bool_t res;

	/*
	 * Save the passed in maxlen value and buf pointer.  We might
	 * need them later.
	 */
	uint_t maxlen_save = objp->maxlen;
	void *buf_save = objp->buf;

	if (!xdr_u_int(xdrs, &objp->maxlen))
		return (FALSE);

	/*
	 * We need to free maxlen, not len, so do it explicitly now.
	 */
	if (xdrs->x_op == XDR_FREE)
		return (xdr_bytes(xdrs, &objp->buf, &objp->maxlen,
		    objp->maxlen));

	/*
	 * If we're decoding and the caller has already allocated a
	 * buffer restore the maxlen value since the decoded value
	 * doesn't apply to the caller's buffer.  xdr_bytes() will
	 * return an error if the buffer isn't big enough.
	 */
	if (xdrs->x_op == XDR_DECODE && objp->buf != NULL)
		objp->maxlen = maxlen_save;

	res = xdr_bytes(xdrs, &objp->buf, &objp->len, objp->maxlen);

	/*
	 * If we are decoding and the buffer was allocated in the
	 * xdr_bytes() function we need to set maxlen properly to
	 * follow the netbuf semantics.
	 */
	if (xdrs->x_op == XDR_DECODE && objp->buf != buf_save)
		objp->maxlen = objp->len;

	return (res);
}