878 lines
16 KiB
C
878 lines
16 KiB
C
/* $NetBSD: xdr.c,v 1.22 2000/07/06 03:10:35 christos Exp $ */
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/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char *sccsid = "@(#)xdr.c 1.35 87/08/12";
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static char *sccsid = "@(#)xdr.c 2.1 88/07/29 4.0 RPCSRC";
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* xdr.c, Generic XDR routines implementation.
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*
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* Copyright (C) 1986, Sun Microsystems, Inc.
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*
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* These are the "generic" xdr routines used to serialize and de-serialize
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* most common data items. See xdr.h for more info on the interface to
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* xdr.
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*/
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#include "namespace.h"
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <rpc/types.h>
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#include <rpc/xdr.h>
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#include "un-namespace.h"
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typedef quad_t longlong_t; /* ANSI long long type */
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typedef u_quad_t u_longlong_t; /* ANSI unsigned long long type */
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/*
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* constants specific to the xdr "protocol"
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*/
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#define XDR_FALSE ((long) 0)
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#define XDR_TRUE ((long) 1)
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#define LASTUNSIGNED ((u_int) 0-1)
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/*
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* for unit alignment
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*/
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static const char xdr_zero[BYTES_PER_XDR_UNIT] = { 0, 0, 0, 0 };
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/*
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* Free a data structure using XDR
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* Not a filter, but a convenient utility nonetheless
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*/
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void
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xdr_free(proc, objp)
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xdrproc_t proc;
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char *objp;
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{
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XDR x;
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x.x_op = XDR_FREE;
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(*proc)(&x, objp);
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}
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/*
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* XDR nothing
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*/
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bool_t
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xdr_void(/* xdrs, addr */)
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/* XDR *xdrs; */
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/* caddr_t addr; */
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{
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return (TRUE);
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}
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/*
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* XDR integers
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*/
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bool_t
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xdr_int(xdrs, ip)
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XDR *xdrs;
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int *ip;
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{
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long l;
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switch (xdrs->x_op) {
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case XDR_ENCODE:
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l = (long) *ip;
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return (XDR_PUTLONG(xdrs, &l));
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case XDR_DECODE:
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if (!XDR_GETLONG(xdrs, &l)) {
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return (FALSE);
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}
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*ip = (int) l;
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return (TRUE);
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case XDR_FREE:
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return (TRUE);
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}
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/* NOTREACHED */
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return (FALSE);
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}
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/*
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* XDR unsigned integers
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*/
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bool_t
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xdr_u_int(xdrs, up)
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XDR *xdrs;
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u_int *up;
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{
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u_long l;
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switch (xdrs->x_op) {
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case XDR_ENCODE:
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l = (u_long) *up;
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return (XDR_PUTLONG(xdrs, (long *)&l));
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case XDR_DECODE:
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if (!XDR_GETLONG(xdrs, (long *)&l)) {
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return (FALSE);
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}
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*up = (u_int) l;
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return (TRUE);
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case XDR_FREE:
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return (TRUE);
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}
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/* NOTREACHED */
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return (FALSE);
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}
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/*
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* XDR long integers
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* same as xdr_u_long - open coded to save a proc call!
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*/
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bool_t
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xdr_long(xdrs, lp)
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XDR *xdrs;
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long *lp;
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{
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switch (xdrs->x_op) {
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case XDR_ENCODE:
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return (XDR_PUTLONG(xdrs, lp));
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case XDR_DECODE:
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return (XDR_GETLONG(xdrs, lp));
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case XDR_FREE:
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return (TRUE);
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}
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/* NOTREACHED */
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return (FALSE);
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}
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/*
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* XDR unsigned long integers
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* same as xdr_long - open coded to save a proc call!
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*/
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bool_t
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xdr_u_long(xdrs, ulp)
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XDR *xdrs;
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u_long *ulp;
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{
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switch (xdrs->x_op) {
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case XDR_ENCODE:
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return (XDR_PUTLONG(xdrs, (long *)ulp));
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case XDR_DECODE:
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return (XDR_GETLONG(xdrs, (long *)ulp));
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case XDR_FREE:
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return (TRUE);
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}
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/* NOTREACHED */
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return (FALSE);
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}
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/*
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* XDR 32-bit integers
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* same as xdr_u_int32_t - open coded to save a proc call!
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*/
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bool_t
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xdr_int32_t(xdrs, int32_p)
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XDR *xdrs;
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int32_t *int32_p;
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{
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long l;
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switch (xdrs->x_op) {
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case XDR_ENCODE:
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l = (long) *int32_p;
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return (XDR_PUTLONG(xdrs, &l));
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case XDR_DECODE:
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if (!XDR_GETLONG(xdrs, &l)) {
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return (FALSE);
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}
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*int32_p = (int32_t) l;
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return (TRUE);
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case XDR_FREE:
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return (TRUE);
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}
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/* NOTREACHED */
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return (FALSE);
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}
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/*
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* XDR unsigned 32-bit integers
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* same as xdr_int32_t - open coded to save a proc call!
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*/
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bool_t
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xdr_u_int32_t(xdrs, u_int32_p)
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XDR *xdrs;
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u_int32_t *u_int32_p;
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{
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u_long l;
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switch (xdrs->x_op) {
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case XDR_ENCODE:
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l = (u_long) *u_int32_p;
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return (XDR_PUTLONG(xdrs, (long *)&l));
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case XDR_DECODE:
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if (!XDR_GETLONG(xdrs, (long *)&l)) {
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return (FALSE);
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}
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*u_int32_p = (u_int32_t) l;
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return (TRUE);
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case XDR_FREE:
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return (TRUE);
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}
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/* NOTREACHED */
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return (FALSE);
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}
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/*
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* XDR short integers
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*/
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bool_t
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xdr_short(xdrs, sp)
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XDR *xdrs;
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short *sp;
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{
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long l;
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switch (xdrs->x_op) {
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case XDR_ENCODE:
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l = (long) *sp;
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return (XDR_PUTLONG(xdrs, &l));
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case XDR_DECODE:
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if (!XDR_GETLONG(xdrs, &l)) {
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return (FALSE);
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}
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*sp = (short) l;
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return (TRUE);
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case XDR_FREE:
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return (TRUE);
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}
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/* NOTREACHED */
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return (FALSE);
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}
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/*
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* XDR unsigned short integers
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*/
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bool_t
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xdr_u_short(xdrs, usp)
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XDR *xdrs;
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u_short *usp;
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{
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u_long l;
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switch (xdrs->x_op) {
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case XDR_ENCODE:
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l = (u_long) *usp;
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return (XDR_PUTLONG(xdrs, (long *)&l));
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case XDR_DECODE:
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if (!XDR_GETLONG(xdrs, (long *)&l)) {
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return (FALSE);
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}
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*usp = (u_short) l;
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return (TRUE);
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case XDR_FREE:
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return (TRUE);
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}
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/* NOTREACHED */
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return (FALSE);
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}
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/*
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* XDR 16-bit integers
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*/
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bool_t
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xdr_int16_t(xdrs, int16_p)
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XDR *xdrs;
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int16_t *int16_p;
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{
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long l;
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switch (xdrs->x_op) {
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case XDR_ENCODE:
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l = (long) *int16_p;
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return (XDR_PUTLONG(xdrs, &l));
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case XDR_DECODE:
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if (!XDR_GETLONG(xdrs, &l)) {
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return (FALSE);
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}
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*int16_p = (int16_t) l;
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return (TRUE);
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case XDR_FREE:
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return (TRUE);
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}
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/* NOTREACHED */
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return (FALSE);
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}
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/*
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* XDR unsigned 16-bit integers
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*/
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bool_t
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xdr_u_int16_t(xdrs, u_int16_p)
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XDR *xdrs;
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u_int16_t *u_int16_p;
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{
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u_long l;
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switch (xdrs->x_op) {
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case XDR_ENCODE:
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l = (u_long) *u_int16_p;
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return (XDR_PUTLONG(xdrs, (long *)&l));
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case XDR_DECODE:
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if (!XDR_GETLONG(xdrs, (long *)&l)) {
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return (FALSE);
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}
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*u_int16_p = (u_int16_t) l;
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return (TRUE);
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case XDR_FREE:
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return (TRUE);
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}
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/* NOTREACHED */
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return (FALSE);
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}
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/*
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* XDR a char
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*/
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bool_t
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xdr_char(xdrs, cp)
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XDR *xdrs;
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char *cp;
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{
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int i;
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i = (*cp);
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if (!xdr_int(xdrs, &i)) {
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return (FALSE);
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}
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*cp = i;
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return (TRUE);
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}
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/*
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* XDR an unsigned char
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*/
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bool_t
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xdr_u_char(xdrs, cp)
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XDR *xdrs;
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u_char *cp;
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{
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u_int u;
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u = (*cp);
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if (!xdr_u_int(xdrs, &u)) {
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return (FALSE);
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}
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*cp = u;
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return (TRUE);
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}
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/*
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* XDR booleans
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*/
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bool_t
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xdr_bool(xdrs, bp)
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XDR *xdrs;
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bool_t *bp;
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{
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long lb;
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switch (xdrs->x_op) {
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case XDR_ENCODE:
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lb = *bp ? XDR_TRUE : XDR_FALSE;
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return (XDR_PUTLONG(xdrs, &lb));
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case XDR_DECODE:
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if (!XDR_GETLONG(xdrs, &lb)) {
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return (FALSE);
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}
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*bp = (lb == XDR_FALSE) ? FALSE : TRUE;
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return (TRUE);
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case XDR_FREE:
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return (TRUE);
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}
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/* NOTREACHED */
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return (FALSE);
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}
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/*
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* XDR enumerations
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*/
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bool_t
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xdr_enum(xdrs, ep)
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XDR *xdrs;
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enum_t *ep;
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{
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enum sizecheck { SIZEVAL }; /* used to find the size of an enum */
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/*
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* enums are treated as ints
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*/
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/* LINTED */ if (sizeof (enum sizecheck) == sizeof (long)) {
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return (xdr_long(xdrs, (long *)(void *)ep));
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} else /* LINTED */ if (sizeof (enum sizecheck) == sizeof (int)) {
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return (xdr_int(xdrs, (int *)(void *)ep));
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} else /* LINTED */ if (sizeof (enum sizecheck) == sizeof (short)) {
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return (xdr_short(xdrs, (short *)(void *)ep));
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} else {
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return (FALSE);
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}
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}
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/*
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* XDR opaque data
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* Allows the specification of a fixed size sequence of opaque bytes.
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* cp points to the opaque object and cnt gives the byte length.
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*/
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bool_t
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xdr_opaque(xdrs, cp, cnt)
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XDR *xdrs;
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caddr_t cp;
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u_int cnt;
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{
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u_int rndup;
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static int crud[BYTES_PER_XDR_UNIT];
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/*
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* if no data we are done
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*/
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if (cnt == 0)
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return (TRUE);
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/*
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* round byte count to full xdr units
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*/
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rndup = cnt % BYTES_PER_XDR_UNIT;
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if (rndup > 0)
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rndup = BYTES_PER_XDR_UNIT - rndup;
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if (xdrs->x_op == XDR_DECODE) {
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if (!XDR_GETBYTES(xdrs, cp, cnt)) {
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return (FALSE);
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}
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if (rndup == 0)
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return (TRUE);
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return (XDR_GETBYTES(xdrs, (caddr_t)(void *)crud, rndup));
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}
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if (xdrs->x_op == XDR_ENCODE) {
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if (!XDR_PUTBYTES(xdrs, cp, cnt)) {
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return (FALSE);
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}
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if (rndup == 0)
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return (TRUE);
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return (XDR_PUTBYTES(xdrs, xdr_zero, rndup));
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}
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if (xdrs->x_op == XDR_FREE) {
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return (TRUE);
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}
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return (FALSE);
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}
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/*
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* XDR counted bytes
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* *cpp is a pointer to the bytes, *sizep is the count.
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* If *cpp is NULL maxsize bytes are allocated
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*/
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bool_t
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xdr_bytes(xdrs, cpp, sizep, maxsize)
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XDR *xdrs;
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char **cpp;
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u_int *sizep;
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u_int maxsize;
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{
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char *sp = *cpp; /* sp is the actual string pointer */
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u_int nodesize;
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/*
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* first deal with the length since xdr bytes are counted
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*/
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if (! xdr_u_int(xdrs, sizep)) {
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return (FALSE);
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}
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nodesize = *sizep;
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if ((nodesize > maxsize) && (xdrs->x_op != XDR_FREE)) {
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return (FALSE);
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}
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/*
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* now deal with the actual bytes
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*/
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switch (xdrs->x_op) {
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case XDR_DECODE:
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if (nodesize == 0) {
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return (TRUE);
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}
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if (sp == NULL) {
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*cpp = sp = mem_alloc(nodesize);
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}
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if (sp == NULL) {
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warnx("xdr_bytes: out of memory");
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return (FALSE);
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}
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/* FALLTHROUGH */
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case XDR_ENCODE:
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return (xdr_opaque(xdrs, sp, nodesize));
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case XDR_FREE:
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if (sp != NULL) {
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mem_free(sp, nodesize);
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*cpp = NULL;
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}
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return (TRUE);
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}
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/* NOTREACHED */
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return (FALSE);
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}
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/*
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* Implemented here due to commonality of the object.
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*/
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bool_t
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xdr_netobj(xdrs, np)
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XDR *xdrs;
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struct netobj *np;
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{
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return (xdr_bytes(xdrs, &np->n_bytes, &np->n_len, MAX_NETOBJ_SZ));
|
|
}
|
|
|
|
/*
|
|
* XDR a descriminated union
|
|
* Support routine for discriminated unions.
|
|
* You create an array of xdrdiscrim structures, terminated with
|
|
* an entry with a null procedure pointer. The routine gets
|
|
* the discriminant value and then searches the array of xdrdiscrims
|
|
* looking for that value. It calls the procedure given in the xdrdiscrim
|
|
* to handle the discriminant. If there is no specific routine a default
|
|
* routine may be called.
|
|
* If there is no specific or default routine an error is returned.
|
|
*/
|
|
bool_t
|
|
xdr_union(xdrs, dscmp, unp, choices, dfault)
|
|
XDR *xdrs;
|
|
enum_t *dscmp; /* enum to decide which arm to work on */
|
|
char *unp; /* the union itself */
|
|
const struct xdr_discrim *choices; /* [value, xdr proc] for each arm */
|
|
xdrproc_t dfault; /* default xdr routine */
|
|
{
|
|
enum_t dscm;
|
|
|
|
/*
|
|
* we deal with the discriminator; it's an enum
|
|
*/
|
|
if (! xdr_enum(xdrs, dscmp)) {
|
|
return (FALSE);
|
|
}
|
|
dscm = *dscmp;
|
|
|
|
/*
|
|
* search choices for a value that matches the discriminator.
|
|
* if we find one, execute the xdr routine for that value.
|
|
*/
|
|
for (; choices->proc != NULL_xdrproc_t; choices++) {
|
|
if (choices->value == dscm)
|
|
return ((*(choices->proc))(xdrs, unp));
|
|
}
|
|
|
|
/*
|
|
* no match - execute the default xdr routine if there is one
|
|
*/
|
|
return ((dfault == NULL_xdrproc_t) ? FALSE :
|
|
(*dfault)(xdrs, unp));
|
|
}
|
|
|
|
|
|
/*
|
|
* Non-portable xdr primitives.
|
|
* Care should be taken when moving these routines to new architectures.
|
|
*/
|
|
|
|
|
|
/*
|
|
* XDR null terminated ASCII strings
|
|
* xdr_string deals with "C strings" - arrays of bytes that are
|
|
* terminated by a NULL character. The parameter cpp references a
|
|
* pointer to storage; If the pointer is null, then the necessary
|
|
* storage is allocated. The last parameter is the max allowed length
|
|
* of the string as specified by a protocol.
|
|
*/
|
|
bool_t
|
|
xdr_string(xdrs, cpp, maxsize)
|
|
XDR *xdrs;
|
|
char **cpp;
|
|
u_int maxsize;
|
|
{
|
|
char *sp = *cpp; /* sp is the actual string pointer */
|
|
u_int size;
|
|
u_int nodesize;
|
|
|
|
/*
|
|
* first deal with the length since xdr strings are counted-strings
|
|
*/
|
|
switch (xdrs->x_op) {
|
|
case XDR_FREE:
|
|
if (sp == NULL) {
|
|
return(TRUE); /* already free */
|
|
}
|
|
/* FALLTHROUGH */
|
|
case XDR_ENCODE:
|
|
size = strlen(sp);
|
|
break;
|
|
case XDR_DECODE:
|
|
break;
|
|
}
|
|
if (! xdr_u_int(xdrs, &size)) {
|
|
return (FALSE);
|
|
}
|
|
if (size > maxsize) {
|
|
return (FALSE);
|
|
}
|
|
nodesize = size + 1;
|
|
|
|
/*
|
|
* now deal with the actual bytes
|
|
*/
|
|
switch (xdrs->x_op) {
|
|
|
|
case XDR_DECODE:
|
|
if (nodesize == 0) {
|
|
return (TRUE);
|
|
}
|
|
if (sp == NULL)
|
|
*cpp = sp = mem_alloc(nodesize);
|
|
if (sp == NULL) {
|
|
warnx("xdr_string: out of memory");
|
|
return (FALSE);
|
|
}
|
|
sp[size] = 0;
|
|
/* FALLTHROUGH */
|
|
|
|
case XDR_ENCODE:
|
|
return (xdr_opaque(xdrs, sp, size));
|
|
|
|
case XDR_FREE:
|
|
mem_free(sp, nodesize);
|
|
*cpp = NULL;
|
|
return (TRUE);
|
|
}
|
|
/* NOTREACHED */
|
|
return (FALSE);
|
|
}
|
|
|
|
/*
|
|
* Wrapper for xdr_string that can be called directly from
|
|
* routines like clnt_call
|
|
*/
|
|
bool_t
|
|
xdr_wrapstring(xdrs, cpp)
|
|
XDR *xdrs;
|
|
char **cpp;
|
|
{
|
|
return xdr_string(xdrs, cpp, LASTUNSIGNED);
|
|
}
|
|
|
|
/*
|
|
* NOTE: xdr_hyper(), xdr_u_hyper(), xdr_longlong_t(), and xdr_u_longlong_t()
|
|
* are in the "non-portable" section because they require that a `long long'
|
|
* be a 64-bit type.
|
|
*
|
|
* --thorpej@netbsd.org, November 30, 1999
|
|
*/
|
|
|
|
/*
|
|
* XDR 64-bit integers
|
|
*/
|
|
bool_t
|
|
xdr_int64_t(xdrs, llp)
|
|
XDR *xdrs;
|
|
int64_t *llp;
|
|
{
|
|
u_long ul[2];
|
|
|
|
switch (xdrs->x_op) {
|
|
case XDR_ENCODE:
|
|
ul[0] = (u_long)((u_int64_t)*llp >> 32) & 0xffffffff;
|
|
ul[1] = (u_long)((u_int64_t)*llp) & 0xffffffff;
|
|
if (XDR_PUTLONG(xdrs, (long *)&ul[0]) == FALSE)
|
|
return (FALSE);
|
|
return (XDR_PUTLONG(xdrs, (long *)&ul[1]));
|
|
case XDR_DECODE:
|
|
if (XDR_GETLONG(xdrs, (long *)&ul[0]) == FALSE)
|
|
return (FALSE);
|
|
if (XDR_GETLONG(xdrs, (long *)&ul[1]) == FALSE)
|
|
return (FALSE);
|
|
*llp = (int64_t)
|
|
(((u_int64_t)ul[0] << 32) | ((u_int64_t)ul[1]));
|
|
return (TRUE);
|
|
case XDR_FREE:
|
|
return (TRUE);
|
|
}
|
|
/* NOTREACHED */
|
|
return (FALSE);
|
|
}
|
|
|
|
|
|
/*
|
|
* XDR unsigned 64-bit integers
|
|
*/
|
|
bool_t
|
|
xdr_u_int64_t(xdrs, ullp)
|
|
XDR *xdrs;
|
|
u_int64_t *ullp;
|
|
{
|
|
u_long ul[2];
|
|
|
|
switch (xdrs->x_op) {
|
|
case XDR_ENCODE:
|
|
ul[0] = (u_long)(*ullp >> 32) & 0xffffffff;
|
|
ul[1] = (u_long)(*ullp) & 0xffffffff;
|
|
if (XDR_PUTLONG(xdrs, (long *)&ul[0]) == FALSE)
|
|
return (FALSE);
|
|
return (XDR_PUTLONG(xdrs, (long *)&ul[1]));
|
|
case XDR_DECODE:
|
|
if (XDR_GETLONG(xdrs, (long *)&ul[0]) == FALSE)
|
|
return (FALSE);
|
|
if (XDR_GETLONG(xdrs, (long *)&ul[1]) == FALSE)
|
|
return (FALSE);
|
|
*ullp = (u_int64_t)
|
|
(((u_int64_t)ul[0] << 32) | ((u_int64_t)ul[1]));
|
|
return (TRUE);
|
|
case XDR_FREE:
|
|
return (TRUE);
|
|
}
|
|
/* NOTREACHED */
|
|
return (FALSE);
|
|
}
|
|
|
|
|
|
/*
|
|
* XDR hypers
|
|
*/
|
|
bool_t
|
|
xdr_hyper(xdrs, llp)
|
|
XDR *xdrs;
|
|
longlong_t *llp;
|
|
{
|
|
|
|
/*
|
|
* Don't bother open-coding this; it's a fair amount of code. Just
|
|
* call xdr_int64_t().
|
|
*/
|
|
return (xdr_int64_t(xdrs, (int64_t *)llp));
|
|
}
|
|
|
|
|
|
/*
|
|
* XDR unsigned hypers
|
|
*/
|
|
bool_t
|
|
xdr_u_hyper(xdrs, ullp)
|
|
XDR *xdrs;
|
|
u_longlong_t *ullp;
|
|
{
|
|
|
|
/*
|
|
* Don't bother open-coding this; it's a fair amount of code. Just
|
|
* call xdr_u_int64_t().
|
|
*/
|
|
return (xdr_u_int64_t(xdrs, (u_int64_t *)ullp));
|
|
}
|
|
|
|
|
|
/*
|
|
* XDR longlong_t's
|
|
*/
|
|
bool_t
|
|
xdr_longlong_t(xdrs, llp)
|
|
XDR *xdrs;
|
|
longlong_t *llp;
|
|
{
|
|
|
|
/*
|
|
* Don't bother open-coding this; it's a fair amount of code. Just
|
|
* call xdr_int64_t().
|
|
*/
|
|
return (xdr_int64_t(xdrs, (int64_t *)llp));
|
|
}
|
|
|
|
|
|
/*
|
|
* XDR u_longlong_t's
|
|
*/
|
|
bool_t
|
|
xdr_u_longlong_t(xdrs, ullp)
|
|
XDR *xdrs;
|
|
u_longlong_t *ullp;
|
|
{
|
|
|
|
/*
|
|
* Don't bother open-coding this; it's a fair amount of code. Just
|
|
* call xdr_u_int64_t().
|
|
*/
|
|
return (xdr_u_int64_t(xdrs, (u_int64_t *)ullp));
|
|
}
|