OpenSolaris_b135/lib/libnsl/rpc/rpcb_prot.c
/*
* 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 2006 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.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* XDR routines for the rpcbinder version 3.
*/
#include "mt.h"
#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_u_int(xdrs, (uint_t *)&objp->r_prog))
return (FALSE);
if (!xdr_u_int(xdrs, (uint_t *)&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);
return (xdr_string(xdrs, &objp->r_owner, ~0));
}
/*
* rpcblist_ptr implements a linked list. The RPCL definition from
* rpcb_prot.x is:
*
* struct rpcblist {
* rpcb rpcb_map;
* struct rpcblist *rpcb_next;
* };
* typedef rpcblist *rpcblist_ptr;
*
* Recall that "pointers" in XDR are encoded as a boolean, indicating whether
* there's any data behind the pointer, followed by the data (if any exists).
* The boolean can be interpreted as ``more data follows me''; if FALSE then
* nothing follows the boolean; if TRUE then the boolean is followed by an
* actual struct rpcb, and another rpcblist_ptr (declared in RPCL as "struct
* rpcblist *").
*
* This could be implemented via the xdr_pointer type, though this would
* result in one recursive call per element in the list. Rather than do that
* we can ``unwind'' the recursion into a while loop and use xdr_reference to
* serialize the rpcb elements.
*/
bool_t
xdr_rpcblist_ptr(XDR *xdrs, rpcblist_ptr *rp)
{
/*
* more_elements is pre-computed in case the direction is
* XDR_ENCODE or XDR_FREE. more_elements is overwritten by
* xdr_bool when the direction is XDR_DECODE.
*/
bool_t more_elements;
int freeing = (xdrs->x_op == XDR_FREE);
rpcblist_ptr next;
rpcblist_ptr next_copy;
for (;;) {
more_elements = (bool_t)(*rp != NULL);
if (!xdr_bool(xdrs, &more_elements))
return (FALSE);
if (!more_elements)
return (TRUE); /* we are done */
/*
* the unfortunate side effect of non-recursion is that in
* the case of freeing we must remember the next object
* before we free the current object ...
*/
if (freeing)
next = (*rp)->rpcb_next;
if (!xdr_reference(xdrs, (caddr_t *)rp,
(uint_t)sizeof (rpcblist), (xdrproc_t)xdr_rpcb))
return (FALSE);
if (freeing) {
next_copy = next;
rp = &next_copy;
/*
* Note that in the subsequent iteration, next_copy
* gets nulled out by the xdr_reference
* but next itself survives.
*/
} else {
rp = &((*rp)->rpcb_next);
}
}
/*NOTREACHED*/
}
/*
* xdr_rpcblist() is specified to take a RPCBLIST **, but is identical in
* functionality to xdr_rpcblist_ptr().
*/
bool_t
xdr_rpcblist(XDR *xdrs, RPCBLIST **rp)
{
return (xdr_rpcblist_ptr(xdrs, (rpcblist_ptr *)rp));
}
bool_t
xdr_rpcb_entry(XDR *xdrs, rpcb_entry *objp)
{
if (!xdr_string(xdrs, &objp->r_maddr, ~0))
return (FALSE);
if (!xdr_string(xdrs, &objp->r_nc_netid, ~0))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->r_nc_semantics))
return (FALSE);
if (!xdr_string(xdrs, &objp->r_nc_protofmly, ~0))
return (FALSE);
return (xdr_string(xdrs, &objp->r_nc_proto, ~0));
}
bool_t
xdr_rpcb_entry_list_ptr(XDR *xdrs, rpcb_entry_list_ptr *rp)
{
/*
* more_elements is pre-computed in case the direction is
* XDR_ENCODE or XDR_FREE. more_elements is overwritten by
* xdr_bool when the direction is XDR_DECODE.
*/
bool_t more_elements;
int freeing = (xdrs->x_op == XDR_FREE);
rpcb_entry_list_ptr next;
rpcb_entry_list_ptr next_copy;
for (;;) {
more_elements = (bool_t)(*rp != NULL);
if (!xdr_bool(xdrs, &more_elements))
return (FALSE);
if (!more_elements)
return (TRUE); /* we are done */
/*
* the unfortunate side effect of non-recursion is that in
* the case of freeing we must remember the next object
* before we free the current object ...
*/
if (freeing)
next = (*rp)->rpcb_entry_next;
if (!xdr_reference(xdrs, (caddr_t *)rp,
(uint_t)sizeof (rpcb_entry_list),
(xdrproc_t)xdr_rpcb_entry))
return (FALSE);
if (freeing) {
next_copy = next;
rp = &next_copy;
/*
* Note that in the subsequent iteration, next_copy
* gets nulled out by the xdr_reference
* but next itself survives.
*/
} else {
rp = &((*rp)->rpcb_entry_next);
}
}
/*NOTREACHED*/
}
/*
* XDR remote call arguments
* written for XDR_ENCODE direction only
*/
bool_t
xdr_rpcb_rmtcallargs(XDR *xdrs, struct r_rpcb_rmtcallargs *objp)
{
uint_t lenposition, argposition, position;
rpc_inline_t *buf;
buf = XDR_INLINE(xdrs, 3 * BYTES_PER_XDR_UNIT);
if (buf == NULL) {
if (!xdr_u_int(xdrs, (uint_t *)&objp->prog))
return (FALSE);
if (!xdr_u_int(xdrs, (uint_t *)&objp->vers))
return (FALSE);
if (!xdr_u_int(xdrs, (uint_t *)&objp->proc))
return (FALSE);
} else {
IXDR_PUT_U_INT32(buf, objp->prog);
IXDR_PUT_U_INT32(buf, objp->vers);
IXDR_PUT_U_INT32(buf, objp->proc);
}
/*
* All the jugglery for just getting the size of the arguments
*/
lenposition = XDR_GETPOS(xdrs);
if (!xdr_u_int(xdrs, &(objp->args.args_len)))
return (FALSE);
argposition = XDR_GETPOS(xdrs);
if (!(*objp->xdr_args)(xdrs, objp->args.args_val))
return (FALSE);
position = XDR_GETPOS(xdrs);
objp->args.args_len = (uint_t)position - (uint_t)argposition;
XDR_SETPOS(xdrs, lenposition);
if (!xdr_u_int(xdrs, &(objp->args.args_len)))
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 r_rpcb_rmtcallres *objp)
{
if (!xdr_string(xdrs, &objp->addr, ~0))
return (FALSE);
if (!xdr_u_int(xdrs, &objp->results.results_len))
return (FALSE);
return ((*(objp->xdr_res))(xdrs, objp->results.results_val));
}
bool_t
xdr_netbuf(XDR *xdrs, struct netbuf *objp)
{
if (!xdr_u_int(xdrs, (uint_t *)&objp->maxlen))
return (FALSE);
return (xdr_bytes(xdrs, (char **)&(objp->buf),
(uint_t *)&(objp->len), objp->maxlen));
}