OpenSolaris_b135/lib/libnsl/rpc/pmap_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"
/*
* Protocol for the local binder service, or pmap.
* All the pmap xdr routines here.
*/
#include "mt.h"
#include <rpc/types.h>
#include <rpc/xdr.h>
#include <rpc/pmap_prot.h>
#include <rpc/pmap_rmt.h>
bool_t
xdr_pmap(XDR *xdrs, struct pmap *objp)
{
rpc_inline_t *buf;
switch (xdrs->x_op) {
case XDR_ENCODE:
buf = XDR_INLINE(xdrs, 4 * BYTES_PER_XDR_UNIT);
if (buf == NULL) {
if (!XDR_PUTINT32(xdrs, (int32_t *)&objp->pm_prog))
return (FALSE);
if (!XDR_PUTINT32(xdrs, (int32_t *)&objp->pm_vers))
return (FALSE);
if (!XDR_PUTINT32(xdrs, (int32_t *)&objp->pm_prot))
return (FALSE);
if (!XDR_PUTINT32(xdrs, (int32_t *)&objp->pm_port))
return (FALSE);
} else {
IXDR_PUT_U_INT32(buf, objp->pm_prog);
IXDR_PUT_U_INT32(buf, objp->pm_vers);
IXDR_PUT_U_INT32(buf, objp->pm_prot);
IXDR_PUT_U_INT32(buf, objp->pm_port);
}
return (TRUE);
case XDR_DECODE:
buf = XDR_INLINE(xdrs, 4 * BYTES_PER_XDR_UNIT);
if (buf == NULL) {
if (!XDR_GETINT32(xdrs, (int32_t *)&objp->pm_prog))
return (FALSE);
if (!XDR_GETINT32(xdrs, (int32_t *)&objp->pm_vers))
return (FALSE);
if (!XDR_GETINT32(xdrs, (int32_t *)&objp->pm_prot))
return (FALSE);
if (!XDR_GETINT32(xdrs, (int32_t *)&objp->pm_port))
return (FALSE);
} else {
objp->pm_prog = IXDR_GET_U_INT32(buf);
objp->pm_vers = IXDR_GET_U_INT32(buf);
objp->pm_prot = IXDR_GET_U_INT32(buf);
objp->pm_port = IXDR_GET_U_INT32(buf);
}
return (TRUE);
case XDR_FREE:
return (TRUE);
}
return (FALSE);
}
/*
* pmaplist_ptr implements a linked list. The RPCL definition from
* pmap_prot.x is:
*
* struct pm__list {
* pmap pml_map;
* struct pm__list *pml_next;
* };
* typedef pm__list *pmaplist_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 pmap, and another pmaplist_ptr (declared in RPCL as "struct
* pmaplist *").
*
* 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 pmap elements.
*/
bool_t
xdr_pmaplist_ptr(XDR *xdrs, pmaplist_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);
pmaplist_ptr next;
pmaplist_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)->pml_next;
if (!xdr_reference(xdrs, (caddr_t *)rp,
(uint_t)sizeof (struct pmaplist), (xdrproc_t)xdr_pmap))
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)->pml_next);
}
}
/*NOTREACHED*/
}
/*
* xdr_pmaplist() is specified to take a PMAPLIST **, but is identical in
* functionality to xdr_pmaplist_ptr().
*/
bool_t
xdr_pmaplist(XDR *xdrs, PMAPLIST **rp)
{
return (xdr_pmaplist_ptr(xdrs, (pmaplist_ptr *)rp));
}
/*
* XDR remote call arguments
* written for XDR_ENCODE direction only
*/
bool_t
xdr_rmtcallargs(XDR *xdrs, struct p_rmtcallargs *cap)
{
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 *)&(cap->prog)) ||
!xdr_u_int(xdrs, (uint_t *)&(cap->vers)) ||
!xdr_u_int(xdrs, (uint_t *)&(cap->proc)))
return (FALSE);
} else {
IXDR_PUT_U_INT32(buf, cap->prog);
IXDR_PUT_U_INT32(buf, cap->vers);
IXDR_PUT_U_INT32(buf, cap->proc);
}
/*
* All the jugglery for just getting the size of the arguments
*/
lenposition = XDR_GETPOS(xdrs);
if (!xdr_u_int(xdrs, &(cap->args.args_len)))
return (FALSE);
argposition = XDR_GETPOS(xdrs);
if (!(*cap->xdr_args)(xdrs, cap->args.args_val))
return (FALSE);
position = XDR_GETPOS(xdrs);
cap->args.args_len = position - argposition;
XDR_SETPOS(xdrs, lenposition);
if (!xdr_u_int(xdrs, &(cap->args.args_len)))
return (FALSE);
XDR_SETPOS(xdrs, position);
return (TRUE);
}
/*
* XDR remote call results
* written for XDR_DECODE direction only
*/
bool_t
xdr_rmtcallres(XDR *xdrs, struct p_rmtcallres *crp)
{
if (xdr_u_int(xdrs, (uint_t *)&crp->port) &&
xdr_u_int(xdrs, &crp->res.res_len))
return ((*(crp->xdr_res))(xdrs, crp->res.res_val));
return (FALSE);
}