390 lines
15 KiB
C
390 lines
15 KiB
C
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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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* $NetBSD: xdr.h,v 1.19 2000/07/17 05:00:45 matt 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 _RPC_XDR_H
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#define _RPC_XDR_H
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#include <_ansi.h>
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#include <rpc/types.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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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(XDR *xdrs, <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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{
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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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#if 1
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/* faster version when BYTES_PER_XDR_UNIT is a power of two */
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# define RNDUP(x) (((x) + BYTES_PER_XDR_UNIT - 1) & ~(BYTES_PER_XDR_UNIT - 1))
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#else /* old version */
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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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#endif
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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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{
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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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{
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/* get a long from underlying stream */
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bool_t _EXFNPTR (x_getlong, (struct __rpc_xdr *, long *));
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/* put a long to " */
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bool_t _EXFNPTR (x_putlong, (struct __rpc_xdr *, _CONST long *));
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/* get some bytes from " */
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bool_t _EXFNPTR (x_getbytes, (struct __rpc_xdr *, char *, u_int));
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/* put some bytes to " */
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bool_t _EXFNPTR (x_putbytes, (struct __rpc_xdr *, _CONST char *, u_int));
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/* returns bytes off from beginning */
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u_int _EXFNPTR (x_getpostn, (struct __rpc_xdr *));
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/* lets you reposition the stream */
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bool_t _EXFNPTR (x_setpostn, (struct __rpc_xdr *, u_int));
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/* buf quick ptr to buffered data */
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int32_t * _EXFNPTR (x_inline, (struct __rpc_xdr *, u_int));
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/* free privates of this xdr_stream */
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void _EXFNPTR (x_destroy, (struct __rpc_xdr *));
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/* get an int32 from this xdr_stream */
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bool_t _EXFNPTR (x_getint32, (struct __rpc_xdr *, int32_t *));
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/* put an int32 to the underlying stream */
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bool_t _EXFNPTR (x_putint32, (struct __rpc_xdr *, _CONST int32_t *));
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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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* bool_t (*xdrproc_t)(XDR *, some_type *)
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*/
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typedef bool_t _EXFNPTR(xdrproc_t, (XDR *, ...));
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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_GETINT32(xdrs, int32p) \
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(*(xdrs)->x_ops->x_getint32)(xdrs, int32p)
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#define xdr_getint32(xdrs, int32p) \
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(*(xdrs)->x_ops->x_getint32)(xdrs, int32p)
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#define XDR_PUTINT32(xdrs, int32p) \
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(*(xdrs)->x_ops->x_putint32)(xdrs, int32p)
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#define xdr_putint32(xdrs, int32p) \
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(*(xdrs)->x_ops->x_putint32)(xdrs, int32p)
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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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#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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do { \
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if ((xdrs)->x_ops->x_destroy) \
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(*(xdrs)->x_ops->x_destroy)(xdrs); \
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} while (0)
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#define xdr_destroy(xdrs) \
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do { \
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if ((xdrs)->x_ops->x_destroy) \
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(*(xdrs)->x_ops->x_destroy)(xdrs); \
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} while (0)
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/*
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* Solaris strips the '_t' from these types -- not sure why.
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* But, let's be compatible.
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*/
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#define xdr_rpcvers(xdrs, versp) xdr_u_int32(xdrs, versp)
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#define xdr_rpcprog(xdrs, progp) xdr_u_int32(xdrs, progp)
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#define xdr_rpcproc(xdrs, procp) xdr_u_int32(xdrs, procp)
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#define xdr_rpcprot(xdrs, protp) xdr_u_int32(xdrs, protp)
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#define xdr_rpcport(xdrs, portp) xdr_u_int32(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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{
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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) ((uint32_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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/* Warning: inline long routines are broken for 64 bit platforms.
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* Because the other inline routines below are implemented in terms
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* of them, they are all also broken for 64 bit platforms.
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*/
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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_U_LONG(buf) ((u_long)IXDR_GET_LONG(buf))
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#define IXDR_PUT_U_LONG(buf, v) IXDR_PUT_LONG((buf), (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_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_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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extern bool_t _EXFUN (xdr_void, (void));
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extern bool_t _EXFUN (xdr_short, (XDR *, short *));
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extern bool_t _EXFUN (xdr_u_short, (XDR *, u_short *));
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extern bool_t _EXFUN (xdr_int, (XDR *, int *));
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extern bool_t _EXFUN (xdr_u_int, (XDR *, u_int *));
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extern bool_t _EXFUN (xdr_long, (XDR *, long *));
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extern bool_t _EXFUN (xdr_u_long, (XDR *, u_long *));
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extern bool_t _EXFUN (xdr_int8_t, (XDR *, int8_t *));
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extern bool_t _EXFUN (xdr_uint8_t, (XDR *, uint8_t *));
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extern bool_t _EXFUN (xdr_u_int8_t, (XDR *, u_int8_t *));
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extern bool_t _EXFUN (xdr_int16_t, (XDR *, int16_t *));
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extern bool_t _EXFUN (xdr_uint16_t, (XDR *, uint16_t *));
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extern bool_t _EXFUN (xdr_u_int16_t, (XDR *, u_int16_t *));
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extern bool_t _EXFUN (xdr_int32_t, (XDR *, int32_t *));
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extern bool_t _EXFUN (xdr_uint32_t, (XDR *, uint32_t *));
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extern bool_t _EXFUN (xdr_u_int32_t, (XDR *, u_int32_t *));
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#if defined(___int64_t_defined)
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extern bool_t _EXFUN (xdr_int64_t, (XDR *, int64_t *));
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extern bool_t _EXFUN (xdr_uint64_t, (XDR *, uint64_t *));
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extern bool_t _EXFUN (xdr_u_int64_t, (XDR *, u_int64_t *));
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#endif /* ___int64_t_defined */
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extern bool_t _EXFUN (xdr_bool, (XDR *, bool_t *));
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extern bool_t _EXFUN (xdr_enum, (XDR *, enum_t *));
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extern bool_t _EXFUN (xdr_array, (XDR *, char **, u_int *, u_int, u_int, xdrproc_t));
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extern bool_t _EXFUN (xdr_bytes, (XDR *, char **, u_int *, u_int));
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extern bool_t _EXFUN (xdr_opaque, (XDR *, char *, u_int));
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extern bool_t _EXFUN (xdr_string, (XDR *, char **, u_int));
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extern bool_t _EXFUN (xdr_union, (XDR *, enum_t *, char *,
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_CONST struct xdr_discrim *, xdrproc_t));
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extern bool_t _EXFUN (xdr_char, (XDR *, char *));
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extern bool_t _EXFUN (xdr_u_char, (XDR *, u_char *));
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extern bool_t _EXFUN (xdr_vector, (XDR *, char *, u_int, u_int, xdrproc_t));
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extern bool_t _EXFUN (xdr_float, (XDR *, float *));
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extern bool_t _EXFUN (xdr_double, (XDR *, double *));
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/* extern bool_t _EXFUN (xdr_quadruple, (XDR *, long double *)); */
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extern bool_t _EXFUN (xdr_reference, (XDR *, char **, u_int, xdrproc_t));
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extern bool_t _EXFUN (xdr_pointer, (XDR *, char **, u_int, xdrproc_t));
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extern bool_t _EXFUN (xdr_wrapstring, (XDR *, char **));
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#if defined(___int64_t_defined)
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extern bool_t _EXFUN (xdr_hyper, (XDR *, quad_t *));
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extern bool_t _EXFUN (xdr_u_hyper, (XDR *, u_quad_t *));
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extern bool_t _EXFUN (xdr_longlong_t, (XDR *, quad_t *));
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extern bool_t _EXFUN (xdr_u_longlong_t, (XDR *, u_quad_t *));
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#endif /* ___int64_t_defined */
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extern u_long _EXFUN (xdr_sizeof, (xdrproc_t, void *));
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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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{
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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 _EXFUN (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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/* XDR using memory buffers */
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extern void _EXFUN (xdrmem_create, (XDR *, char *, u_int, enum xdr_op));
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/* XDR using stdio library */
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#if defined(_STDIO_H_)
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extern void _EXFUN (xdrstdio_create, (XDR *, FILE *, enum xdr_op));
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#endif
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/* XDR pseudo records for tcp */
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extern void _EXFUN (xdrrec_create, (XDR *, u_int, u_int, void *,
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int _EXPARM (, (void *, void *, int)),
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int _EXPARM (, (void *, void *, int))));
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/* make end of xdr record */
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extern bool_t _EXFUN (xdrrec_endofrecord, (XDR *, bool_t));
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/* move to beginning of next record */
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extern bool_t _EXFUN (xdrrec_skiprecord, (XDR *));
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/* true if no more input */
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extern bool_t _EXFUN (xdrrec_eof, (XDR *));
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extern u_int _EXFUN (xdrrec_readbytes, (XDR *, caddr_t, u_int));
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/* free memory buffers for xdr */
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extern void _EXFUN (xdr_free, (xdrproc_t, void *));
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#ifdef __cplusplus
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}
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#endif
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#endif /* !_RPC_XDR_H */
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