/* $NetBSD: xdr.h,v 1.19 2000/07/17 05:00:45 matt Exp $ */

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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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* from: @(#)xdr.h 1.19 87/04/22 SMI

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* from: @(#)xdr.h 2.2 88/07/29 4.0 RPCSRC

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* $FreeBSD: src/include/rpc/xdr.h,v 1.23 2003/03/07 13:19:40 nectar Exp $

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*/

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/*

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* xdr.h, External Data Representation Serialization Routines.

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*

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* Copyright (C) 1984, Sun Microsystems, Inc.

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*/

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#ifndef _TIRPC_XDR_H

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#define _TIRPC_XDR_H

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#include <stdio.h>

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#include <netinet/in.h>

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#include <rpc/types.h>

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/*

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* XDR provides a conventional way for converting between C data

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* types and an external bit-string representation. Library supplied

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* routines provide for the conversion on built-in C data types. These

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* routines and utility routines defined here are used to help implement

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* a type encode/decode routine for each user-defined type.

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*

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* Each data type provides a single procedure which takes two arguments:

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*

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* bool_t

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* xdrproc(xdrs, argresp)

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* XDR *xdrs;

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* <type> *argresp;

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*

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* xdrs is an instance of a XDR handle, to which or from which the data

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* type is to be converted. argresp is a pointer to the structure to be

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* converted. The XDR handle contains an operation field which indicates

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* which of the operations (ENCODE, DECODE * or FREE) is to be performed.

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*

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* XDR_DECODE may allocate space if the pointer argresp is null. This

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* data can be freed with the XDR_FREE operation.

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*

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* We write only one procedure per data type to make it easy

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* to keep the encode and decode procedures for a data type consistent.

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* In many cases the same code performs all operations on a user defined type,

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* because all the hard work is done in the component type routines.

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* decode as a series of calls on the nested data types.

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*/

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/*

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* Xdr operations. XDR_ENCODE causes the type to be encoded into the

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* stream. XDR_DECODE causes the type to be extracted from the stream.

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* XDR_FREE can be used to release the space allocated by an XDR_DECODE

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* request.

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*/

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enum xdr_op {

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XDR_ENCODE=0,

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XDR_DECODE=1,

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XDR_FREE=2

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};

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/*

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* This is the number of bytes per unit of external data.

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*/

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#define BYTES_PER_XDR_UNIT (4)

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#define RNDUP(x) ((((x) + BYTES_PER_XDR_UNIT - 1) / BYTES_PER_XDR_UNIT) \

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* BYTES_PER_XDR_UNIT)

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/*

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* The XDR handle.

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* Contains operation which is being applied to the stream,

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* an operations vector for the particular implementation (e.g. see xdr_mem.c),

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* and two private fields for the use of the particular implementation.

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*/

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typedef struct __rpc_xdr {

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enum xdr_op x_op; /* operation; fast additional param */

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const struct xdr_ops {

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/* get a long from underlying stream */

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bool_t (*x_getlong)(struct __rpc_xdr *, long *);

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/* put a long to " */

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bool_t (*x_putlong)(struct __rpc_xdr *, const long *);

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/* get some bytes from " */

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bool_t (*x_getbytes)(struct __rpc_xdr *, char *, u_int);

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/* put some bytes to " */

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bool_t (*x_putbytes)(struct __rpc_xdr *, const char *, u_int);

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/* returns bytes off from beginning */

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u_int (*x_getpostn)(struct __rpc_xdr *);

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/* lets you reposition the stream */

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bool_t (*x_setpostn)(struct __rpc_xdr *, u_int);

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/* buf quick ptr to buffered data */

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int32_t *(*x_inline)(struct __rpc_xdr *, u_int);

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/* free privates of this xdr_stream */

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void (*x_destroy)(struct __rpc_xdr *);

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bool_t (*x_control)(struct __rpc_xdr *, int, void *);

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} *x_ops;

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char * x_public; /* users' data */

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void * x_private; /* pointer to private data */

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char * x_base; /* private used for position info */

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u_int x_handy; /* extra private word */

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} XDR;

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/*

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* A xdrproc_t exists for each data type which is to be encoded or decoded.

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*

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* The second argument to the xdrproc_t is a pointer to an opaque pointer.

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* The opaque pointer generally points to a structure of the data type

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* to be decoded. If this pointer is 0, then the type routines should

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* allocate dynamic storage of the appropriate size and return it.

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*/

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#ifdef _KERNEL

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typedef bool_t (*xdrproc_t)(XDR *, void *, u_int);

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#else

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/*

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* XXX can't actually prototype it, because some take three args!!!

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*/

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typedef bool_t (*xdrproc_t)(XDR *, ...);

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#endif

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/*

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* Operations defined on a XDR handle

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*

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* XDR *xdrs;

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* long *longp;

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* char * addr;

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* u_int len;

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* u_int pos;

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*/

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#define XDR_GETLONG(xdrs, longp) \

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(*(xdrs)->x_ops->x_getlong)(xdrs, longp)

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#define xdr_getlong(xdrs, longp) \

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(*(xdrs)->x_ops->x_getlong)(xdrs, longp)

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#define XDR_PUTLONG(xdrs, longp) \

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(*(xdrs)->x_ops->x_putlong)(xdrs, longp)

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#define xdr_putlong(xdrs, longp) \

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(*(xdrs)->x_ops->x_putlong)(xdrs, longp)

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static __inline int

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xdr_getint32(XDR *xdrs, int32_t *ip)

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{

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long l;

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if (!xdr_getlong(xdrs, &l))

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return (FALSE);

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*ip = (int32_t)l;

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return (TRUE);

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}

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static __inline int

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xdr_putint32(XDR *xdrs, int32_t *ip)

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{

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long l;

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l = (long)*ip;

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return xdr_putlong(xdrs, &l);

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}

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#define XDR_GETINT32(xdrs, int32p) xdr_getint32(xdrs, int32p)

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#define XDR_PUTINT32(xdrs, int32p) xdr_putint32(xdrs, int32p)

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#define XDR_GETBYTES(xdrs, addr, len) \

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(*(xdrs)->x_ops->x_getbytes)(xdrs, addr, len)

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#define xdr_getbytes(xdrs, addr, len) \

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(*(xdrs)->x_ops->x_getbytes)(xdrs, addr, len)

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#define XDR_PUTBYTES(xdrs, addr, len) \

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(*(xdrs)->x_ops->x_putbytes)(xdrs, addr, len)

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#define xdr_putbytes(xdrs, addr, len) \

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(*(xdrs)->x_ops->x_putbytes)(xdrs, addr, len)

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#define XDR_GETPOS(xdrs) \

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(*(xdrs)->x_ops->x_getpostn)(xdrs)

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#define xdr_getpos(xdrs) \

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(*(xdrs)->x_ops->x_getpostn)(xdrs)

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#define XDR_SETPOS(xdrs, pos) \

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(*(xdrs)->x_ops->x_setpostn)(xdrs, pos)

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#define xdr_setpos(xdrs, pos) \

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(*(xdrs)->x_ops->x_setpostn)(xdrs, pos)

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#define XDR_INLINE(xdrs, len) \

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(*(xdrs)->x_ops->x_inline)(xdrs, len)

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#define xdr_inline(xdrs, len) \

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(*(xdrs)->x_ops->x_inline)(xdrs, len)

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#define XDR_DESTROY(xdrs) \

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if ((xdrs)->x_ops->x_destroy) \

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(*(xdrs)->x_ops->x_destroy)(xdrs)

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#define xdr_destroy(xdrs) \

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if ((xdrs)->x_ops->x_destroy) \

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(*(xdrs)->x_ops->x_destroy)(xdrs)

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#define XDR_CONTROL(xdrs, req, op) \

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if ((xdrs)->x_ops->x_control) \

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(*(xdrs)->x_ops->x_control)(xdrs, req, op)

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#define xdr_control(xdrs, req, op) XDR_CONTROL(xdrs, req, op)

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#define xdr_rpcvers(xdrs, versp) xdr_u_int32_t(xdrs, versp)

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#define xdr_rpcprog(xdrs, progp) xdr_u_int32_t(xdrs, progp)

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#define xdr_rpcproc(xdrs, procp) xdr_u_int32_t(xdrs, procp)

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#define xdr_rpcprot(xdrs, protp) xdr_u_int32_t(xdrs, protp)

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#define xdr_rpcport(xdrs, portp) xdr_u_int32_t(xdrs, portp)

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/*

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* Support struct for discriminated unions.

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* You create an array of xdrdiscrim structures, terminated with

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* an entry with a null procedure pointer. The xdr_union routine gets

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* the discriminant value and then searches the array of structures

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* for a matching value. If a match is found the associated xdr routine

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* is called to handle that part of the union. If there is

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* no match, then a default routine may be called.

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* If there is no match and no default routine it is an error.

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*/

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#define NULL_xdrproc_t ((xdrproc_t)0)

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struct xdr_discrim {

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int value;

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xdrproc_t proc;

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};

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/*

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* In-line routines for fast encode/decode of primitive data types.

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* Caveat emptor: these use single memory cycles to get the

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* data from the underlying buffer, and will fail to operate

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* properly if the data is not aligned. The standard way to use these

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* is to say:

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* if ((buf = XDR_INLINE(xdrs, count)) == NULL)

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* return (FALSE);

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* <<< macro calls >>>

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* where ``count'' is the number of bytes of data occupied

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* by the primitive data types.

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*

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* N.B. and frozen for all time: each data type here uses 4 bytes

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* of external representation.

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*/

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#define IXDR_GET_INT32(buf) ((int32_t)ntohl((u_int32_t)*(buf)++))

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#define IXDR_PUT_INT32(buf, v) (*(buf)++ =(int32_t)htonl((u_int32_t)v))

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#define IXDR_GET_U_INT32(buf) ((u_int32_t)IXDR_GET_INT32(buf))

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#define IXDR_PUT_U_INT32(buf, v) IXDR_PUT_INT32((buf), ((int32_t)(v)))

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#define IXDR_GET_LONG(buf) ((long)ntohl((u_int32_t)*(buf)++))

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#define IXDR_PUT_LONG(buf, v) (*(buf)++ =(int32_t)htonl((u_int32_t)v))

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#define IXDR_GET_BOOL(buf) ((bool_t)IXDR_GET_LONG(buf))

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#define IXDR_GET_ENUM(buf, t) ((t)IXDR_GET_LONG(buf))

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#define IXDR_GET_U_LONG(buf) ((u_long)IXDR_GET_LONG(buf))

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#define IXDR_GET_SHORT(buf) ((short)IXDR_GET_LONG(buf))

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#define IXDR_GET_U_SHORT(buf) ((u_short)IXDR_GET_LONG(buf))

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#define IXDR_PUT_BOOL(buf, v) IXDR_PUT_LONG((buf), (v))

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#define IXDR_PUT_ENUM(buf, v) IXDR_PUT_LONG((buf), (v))

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#define IXDR_PUT_U_LONG(buf, v) IXDR_PUT_LONG((buf), (v))

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#define IXDR_PUT_SHORT(buf, v) IXDR_PUT_LONG((buf), (v))

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#define IXDR_PUT_U_SHORT(buf, v) IXDR_PUT_LONG((buf), (v))

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/*

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* These are the "generic" xdr routines.

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*/

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#ifdef __cplusplus

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extern "C" {

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#endif

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extern bool_t xdr_void(void);

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extern bool_t xdr_int(XDR *, int *);

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extern bool_t xdr_u_int(XDR *, u_int *);

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extern bool_t xdr_long(XDR *, long *);

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extern bool_t xdr_u_long(XDR *, u_long *);

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extern bool_t xdr_short(XDR *, short *);

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extern bool_t xdr_u_short(XDR *, u_short *);

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extern bool_t xdr_int8_t(XDR *, int8_t *);

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extern bool_t xdr_u_int8_t(XDR *, uint8_t *);

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extern bool_t xdr_uint8_t(XDR *, uint8_t *);

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extern bool_t xdr_int16_t(XDR *, int16_t *);

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extern bool_t xdr_u_int16_t(XDR *, u_int16_t *);

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extern bool_t xdr_uint16_t(XDR *, uint16_t *);

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extern bool_t xdr_int32_t(XDR *, int32_t *);

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extern bool_t xdr_u_int32_t(XDR *, u_int32_t *);

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extern bool_t xdr_uint32_t(XDR *, uint32_t *);

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extern bool_t xdr_int64_t(XDR *, int64_t *);

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extern bool_t xdr_u_int64_t(XDR *, u_int64_t *);

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extern bool_t xdr_uint64_t(XDR *, uint64_t *);

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extern bool_t xdr_quad_t(XDR *, int64_t *);

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extern bool_t xdr_u_quad_t(XDR *, u_int64_t *);

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extern bool_t xdr_bool(XDR *, bool_t *);

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extern bool_t xdr_enum(XDR *, enum_t *);

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extern bool_t xdr_array(XDR *, char **, u_int *, u_int, u_int, xdrproc_t);

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extern bool_t xdr_bytes(XDR *, char **, u_int *, u_int);

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extern bool_t xdr_opaque(XDR *, char *, u_int);

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extern bool_t xdr_string(XDR *, char **, u_int);

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extern bool_t xdr_union(XDR *, enum_t *, char *, const struct xdr_discrim *, xdrproc_t);

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extern bool_t xdr_char(XDR *, char *);

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extern bool_t xdr_u_char(XDR *, u_char *);

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extern bool_t xdr_vector(XDR *, char *, u_int, u_int, xdrproc_t);

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extern bool_t xdr_float(XDR *, float *);

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extern bool_t xdr_double(XDR *, double *);

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extern bool_t xdr_quadruple(XDR *, long double *);

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extern bool_t xdr_reference(XDR *, char **, u_int, xdrproc_t);

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extern bool_t xdr_pointer(XDR *, char **, u_int, xdrproc_t);

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extern bool_t xdr_wrapstring(XDR *, char **);

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extern void xdr_free(xdrproc_t, void *);

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extern bool_t xdr_hyper(XDR *, quad_t *);

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extern bool_t xdr_u_hyper(XDR *, u_quad_t *);

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extern bool_t xdr_longlong_t(XDR *, quad_t *);

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extern bool_t xdr_u_longlong_t(XDR *, u_quad_t *);

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extern u_long xdr_sizeof(xdrproc_t, void *);

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#ifdef __cplusplus

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}

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#endif

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/*

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* Common opaque bytes objects used by many rpc protocols;

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* declared here due to commonality.

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*/

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#define MAX_NETOBJ_SZ 1024

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struct netobj {

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u_int n_len;

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char *n_bytes;

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};

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typedef struct netobj netobj;

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extern bool_t xdr_netobj(XDR *, struct netobj *);

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/*

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* These are the public routines for the various implementations of

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* xdr streams.

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*/

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#ifdef __cplusplus

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extern "C" {

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#endif

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/* XDR using memory buffers */

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extern void xdrmem_create(XDR *, char *, u_int, enum xdr_op);

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/* XDR using stdio library */

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extern void xdrstdio_create(XDR *, FILE *, enum xdr_op);

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/* XDR pseudo records for tcp */

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extern void xdrrec_create(XDR *, u_int, u_int, void *,

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int (*)(void *, void *, int),

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int (*)(void *, void *, int));

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/* make end of xdr record */

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extern bool_t xdrrec_endofrecord(XDR *, int);

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/* move to beginning of next record */

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extern bool_t xdrrec_skiprecord(XDR *);

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/* true if no more input */

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extern bool_t xdrrec_eof(XDR *);

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extern u_int xdrrec_readbytes(XDR *, caddr_t, u_int);

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#ifdef __cplusplus

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}

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#endif

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#endif /* !_TIRPC_XDR_H */

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