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| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/drm2/drm2/@/rpc/rpcb_prot.c |
/* $NetBSD: rpcb_prot.c,v 1.3 2000/07/14 08:40:42 fvdl Exp $ */
/*
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
* unrestricted use provided that this legend is included on all tape
* media and as a part of the software program in whole or part. Users
* may copy or modify Sun RPC without charge, but are not authorized
* to license or distribute it to anyone else except as part of a product or
* program developed by the user.
*
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
*
* Sun RPC is provided with no support and without any obligation on the
* part of Sun Microsystems, Inc. to assist in its use, correction,
* modification or enhancement.
*
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
* OR ANY PART THEREOF.
*
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
* or profits or other special, indirect and consequential damages, even if
* Sun has been advised of the possibility of such damages.
*
* Sun Microsystems, Inc.
* 2550 Garcia Avenue
* Mountain View, California 94043
*/
/*
* Copyright (c) 1986-1991 by Sun Microsystems Inc.
*/
/* #ident "@(#)rpcb_prot.c 1.13 94/04/24 SMI" */
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)rpcb_prot.c 1.9 89/04/21 Copyr 1984 Sun Micro";
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/rpc/rpcb_prot.c 182154 2008-08-25 09:36:17Z dfr $");
/*
* rpcb_prot.c
* XDR routines for the rpcbinder version 3.
*
* Copyright (C) 1984, 1988, Sun Microsystems, Inc.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <rpc/rpc.h>
#include <rpc/rpcb_prot.h>
bool_t
xdr_portmap(XDR *xdrs, struct portmap *regs)
{
if (xdr_u_long(xdrs, ®s->pm_prog) &&
xdr_u_long(xdrs, ®s->pm_vers) &&
xdr_u_long(xdrs, ®s->pm_prot))
return (xdr_u_long(xdrs, ®s->pm_port));
return (FALSE);
}
bool_t
xdr_rpcb(XDR *xdrs, RPCB *objp)
{
if (!xdr_uint32_t(xdrs, &objp->r_prog)) {
return (FALSE);
}
if (!xdr_uint32_t(xdrs, &objp->r_vers)) {
return (FALSE);
}
if (!xdr_string(xdrs, &objp->r_netid, (u_int)~0)) {
return (FALSE);
}
if (!xdr_string(xdrs, &objp->r_addr, (u_int)~0)) {
return (FALSE);
}
if (!xdr_string(xdrs, &objp->r_owner, (u_int)~0)) {
return (FALSE);
}
return (TRUE);
}
/*
* 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;
next = NULL;
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 && *rp)
next = (*rp)->rpcb_next;
if (! xdr_reference(xdrs, (caddr_t *)rp,
(u_int)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 if (*rp) {
rp = &((*rp)->rpcb_next);
}
}
/*NOTREACHED*/
}
#if 0
/*
* 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)
{
bool_t dummy;
dummy = xdr_rpcblist_ptr(xdrs, (rpcblist_ptr *)rp);
return (dummy);
}
#endif
bool_t
xdr_rpcb_entry(XDR *xdrs, rpcb_entry *objp)
{
if (!xdr_string(xdrs, &objp->r_maddr, (u_int)~0)) {
return (FALSE);
}
if (!xdr_string(xdrs, &objp->r_nc_netid, (u_int)~0)) {
return (FALSE);
}
if (!xdr_uint32_t(xdrs, &objp->r_nc_semantics)) {
return (FALSE);
}
if (!xdr_string(xdrs, &objp->r_nc_protofmly, (u_int)~0)) {
return (FALSE);
}
if (!xdr_string(xdrs, &objp->r_nc_proto, (u_int)~0)) {
return (FALSE);
}
return (TRUE);
}
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;
next = NULL;
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,
(u_int)sizeof (rpcb_entry_list),
(xdrproc_t)xdr_rpcb_entry)) {
return (FALSE);
}
if (freeing && *rp) {
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 if (*rp) {
rp = &((*rp)->rpcb_entry_next);
}
}
/*NOTREACHED*/
}