245 lines
6.8 KiB
C
245 lines
6.8 KiB
C
/* $NetBSD: rpcb_prot.c,v 1.3 2000/07/14 08:40:42 fvdl Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2009, Sun Microsystems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of Sun Microsystems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1986-1991 by Sun Microsystems Inc.
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*/
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/* #ident "@(#)rpcb_prot.c 1.13 94/04/24 SMI" */
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)rpcb_prot.c 1.9 89/04/21 Copyr 1984 Sun Micro";
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#endif
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#include <sys/cdefs.h>
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/*
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* rpcb_prot.c
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* XDR routines for the rpcbinder version 3.
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*
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* Copyright (C) 1984, 1988, Sun Microsystems, Inc.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <rpc/rpc.h>
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#include <rpc/rpc_com.h>
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#include <rpc/rpcb_prot.h>
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bool_t
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xdr_portmap(XDR *xdrs, struct portmap *regs)
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{
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if (xdr_u_long(xdrs, ®s->pm_prog) &&
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xdr_u_long(xdrs, ®s->pm_vers) &&
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xdr_u_long(xdrs, ®s->pm_prot))
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return (xdr_u_long(xdrs, ®s->pm_port));
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return (FALSE);
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}
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bool_t
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xdr_rpcb(XDR *xdrs, RPCB *objp)
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{
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if (!xdr_uint32_t(xdrs, &objp->r_prog)) {
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return (FALSE);
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}
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if (!xdr_uint32_t(xdrs, &objp->r_vers)) {
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return (FALSE);
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}
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if (!xdr_string(xdrs, &objp->r_netid, RPC_MAXDATASIZE)) {
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return (FALSE);
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}
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if (!xdr_string(xdrs, &objp->r_addr, RPC_MAXDATASIZE)) {
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return (FALSE);
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}
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if (!xdr_string(xdrs, &objp->r_owner, RPC_MAXDATASIZE)) {
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return (FALSE);
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}
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return (TRUE);
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}
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/*
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* rpcblist_ptr implements a linked list. The RPCL definition from
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* rpcb_prot.x is:
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*
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* struct rpcblist {
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* rpcb rpcb_map;
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* struct rpcblist *rpcb_next;
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* };
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* typedef rpcblist *rpcblist_ptr;
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*
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* Recall that "pointers" in XDR are encoded as a boolean, indicating whether
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* there's any data behind the pointer, followed by the data (if any exists).
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* The boolean can be interpreted as ``more data follows me''; if FALSE then
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* nothing follows the boolean; if TRUE then the boolean is followed by an
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* actual struct rpcb, and another rpcblist_ptr (declared in RPCL as "struct
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* rpcblist *").
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*
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* This could be implemented via the xdr_pointer type, though this would
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* result in one recursive call per element in the list. Rather than do that
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* we can ``unwind'' the recursion into a while loop and use xdr_reference to
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* serialize the rpcb elements.
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*/
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bool_t
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xdr_rpcblist_ptr(XDR *xdrs, rpcblist_ptr *rp)
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{
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/*
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* more_elements is pre-computed in case the direction is
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* XDR_ENCODE or XDR_FREE. more_elements is overwritten by
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* xdr_bool when the direction is XDR_DECODE.
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*/
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bool_t more_elements;
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int freeing = (xdrs->x_op == XDR_FREE);
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rpcblist_ptr next;
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rpcblist_ptr next_copy;
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next = NULL;
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for (;;) {
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more_elements = (bool_t)(*rp != NULL);
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if (! xdr_bool(xdrs, &more_elements)) {
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return (FALSE);
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}
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if (! more_elements) {
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return (TRUE); /* we are done */
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}
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/*
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* the unfortunate side effect of non-recursion is that in
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* the case of freeing we must remember the next object
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* before we free the current object ...
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*/
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if (freeing && *rp)
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next = (*rp)->rpcb_next;
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if (! xdr_reference(xdrs, (caddr_t *)rp,
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(u_int)sizeof (RPCBLIST), (xdrproc_t)xdr_rpcb)) {
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return (FALSE);
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}
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if (freeing) {
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next_copy = next;
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rp = &next_copy;
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/*
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* Note that in the subsequent iteration, next_copy
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* gets nulled out by the xdr_reference
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* but next itself survives.
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*/
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} else if (*rp) {
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rp = &((*rp)->rpcb_next);
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}
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}
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/*NOTREACHED*/
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}
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#if 0
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/*
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* xdr_rpcblist() is specified to take a RPCBLIST **, but is identical in
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* functionality to xdr_rpcblist_ptr().
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*/
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bool_t
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xdr_rpcblist(XDR *xdrs, RPCBLIST **rp)
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{
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bool_t dummy;
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dummy = xdr_rpcblist_ptr(xdrs, (rpcblist_ptr *)rp);
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return (dummy);
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}
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#endif
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bool_t
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xdr_rpcb_entry(XDR *xdrs, rpcb_entry *objp)
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{
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if (!xdr_string(xdrs, &objp->r_maddr, RPC_MAXDATASIZE)) {
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return (FALSE);
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}
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if (!xdr_string(xdrs, &objp->r_nc_netid, RPC_MAXDATASIZE)) {
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return (FALSE);
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}
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if (!xdr_uint32_t(xdrs, &objp->r_nc_semantics)) {
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return (FALSE);
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}
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if (!xdr_string(xdrs, &objp->r_nc_protofmly, RPC_MAXDATASIZE)) {
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return (FALSE);
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}
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if (!xdr_string(xdrs, &objp->r_nc_proto, RPC_MAXDATASIZE)) {
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return (FALSE);
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}
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return (TRUE);
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}
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bool_t
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xdr_rpcb_entry_list_ptr(XDR *xdrs, rpcb_entry_list_ptr *rp)
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{
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/*
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* more_elements is pre-computed in case the direction is
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* XDR_ENCODE or XDR_FREE. more_elements is overwritten by
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* xdr_bool when the direction is XDR_DECODE.
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*/
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bool_t more_elements;
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int freeing = (xdrs->x_op == XDR_FREE);
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rpcb_entry_list_ptr next;
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rpcb_entry_list_ptr next_copy;
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next = NULL;
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for (;;) {
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more_elements = (bool_t)(*rp != NULL);
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if (! xdr_bool(xdrs, &more_elements)) {
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return (FALSE);
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}
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if (! more_elements) {
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return (TRUE); /* we are done */
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}
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/*
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* the unfortunate side effect of non-recursion is that in
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* the case of freeing we must remember the next object
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* before we free the current object ...
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*/
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if (freeing)
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next = (*rp)->rpcb_entry_next;
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if (! xdr_reference(xdrs, (caddr_t *)rp,
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(u_int)sizeof (rpcb_entry_list),
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(xdrproc_t)xdr_rpcb_entry)) {
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return (FALSE);
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}
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if (freeing && *rp) {
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next_copy = next;
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rp = &next_copy;
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/*
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* Note that in the subsequent iteration, next_copy
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* gets nulled out by the xdr_reference
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* but next itself survives.
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*/
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} else if (*rp) {
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rp = &((*rp)->rpcb_entry_next);
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}
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}
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/*NOTREACHED*/
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}
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