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libc/newlib/libc/include/rpc/xdr.h

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/*
* Copyright (c) 2009, Sun Microsystems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of Sun Microsystems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* from: @(#)xdr.h 1.19 87/04/22 SMI
* from: @(#)xdr.h 2.2 88/07/29 4.0 RPCSRC
* $FreeBSD: src/include/rpc/xdr.h,v 1.23 2003/03/07 13:19:40 nectar Exp $
* $NetBSD: xdr.h,v 1.19 2000/07/17 05:00:45 matt Exp $
*/
/*
* xdr.h, External Data Representation Serialization Routines.
*
* Copyright (C) 1984, Sun Microsystems, Inc.
*/
#ifndef _RPC_XDR_H
#define _RPC_XDR_H
#include <_ansi.h>
#include <rpc/types.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* XDR provides a conventional way for converting between C data
* types and an external bit-string representation. Library supplied
* routines provide for the conversion on built-in C data types. These
* routines and utility routines defined here are used to help implement
* a type encode/decode routine for each user-defined type.
*
* Each data type provides a single procedure which takes two arguments:
*
* bool_t
* xdrproc(XDR *xdrs, <type> *argresp)
*
* xdrs is an instance of a XDR handle, to which or from which the data
* type is to be converted. argresp is a pointer to the structure to be
* converted. The XDR handle contains an operation field which indicates
* which of the operations (ENCODE, DECODE * or FREE) is to be performed.
*
* XDR_DECODE may allocate space if the pointer argresp is null. This
* data can be freed with the XDR_FREE operation.
*
* We write only one procedure per data type to make it easy
* to keep the encode and decode procedures for a data type consistent.
* In many cases the same code performs all operations on a user defined type,
* because all the hard work is done in the component type routines.
* decode as a series of calls on the nested data types.
*/
/*
* Xdr operations. XDR_ENCODE causes the type to be encoded into the
* stream. XDR_DECODE causes the type to be extracted from the stream.
* XDR_FREE can be used to release the space allocated by an XDR_DECODE
* request.
*/
enum xdr_op
{
XDR_ENCODE = 0,
XDR_DECODE = 1,
XDR_FREE = 2
};
/*
* This is the number of bytes per unit of external data.
*/
#define BYTES_PER_XDR_UNIT (4)
#if 1
/* faster version when BYTES_PER_XDR_UNIT is a power of two */
# define RNDUP(x) (((x) + BYTES_PER_XDR_UNIT - 1) & ~(BYTES_PER_XDR_UNIT - 1))
#else /* old version */
#define RNDUP(x) ((((x) + BYTES_PER_XDR_UNIT - 1) / BYTES_PER_XDR_UNIT) \
* BYTES_PER_XDR_UNIT)
#endif
/*
* The XDR handle.
* Contains operation which is being applied to the stream,
* an operations vector for the particular implementation (e.g. see xdr_mem.c),
* and two private fields for the use of the particular implementation.
*/
typedef struct __rpc_xdr
{
enum xdr_op x_op; /* operation; fast additional param */
const struct xdr_ops
{
/* get a long from underlying stream */
bool_t (*x_getlong) (struct __rpc_xdr *, long *);
/* put a long to " */
bool_t (*x_putlong) (struct __rpc_xdr *, const long *);
/* get some bytes from " */
bool_t (*x_getbytes) (struct __rpc_xdr *, char *, u_int);
/* put some bytes to " */
bool_t (*x_putbytes) (struct __rpc_xdr *, const char *, u_int);
/* returns bytes off from beginning */
u_int (*x_getpostn) (struct __rpc_xdr *);
/* lets you reposition the stream */
bool_t (*x_setpostn) (struct __rpc_xdr *, u_int);
/* buf quick ptr to buffered data */
int32_t * (*x_inline) (struct __rpc_xdr *, u_int);
/* free privates of this xdr_stream */
void (*x_destroy) (struct __rpc_xdr *);
/* get an int32 from this xdr_stream */
bool_t (*x_getint32) (struct __rpc_xdr *, int32_t *);
/* put an int32 to the underlying stream */
bool_t (*x_putint32) (struct __rpc_xdr *, const int32_t *);
} *x_ops;
char *x_public; /* users' data */
void *x_private; /* pointer to private data */
char *x_base; /* private used for position info */
u_int x_handy; /* extra private word */
} XDR;
/*
* A xdrproc_t exists for each data type which is to be encoded or decoded.
*
* The second argument to the xdrproc_t is a pointer to an opaque pointer.
* The opaque pointer generally points to a structure of the data type
* to be decoded. If this pointer is 0, then the type routines should
* allocate dynamic storage of the appropriate size and return it.
* bool_t (*xdrproc_t)(XDR *, some_type *)
*/
typedef bool_t (*xdrproc_t) (XDR *, ...);
/*
* Operations defined on a XDR handle
*
* XDR *xdrs;
* long *longp;
* char *addr;
* u_int len;
* u_int pos;
*/
#define XDR_GETINT32(xdrs, int32p) \
(*(xdrs)->x_ops->x_getint32)(xdrs, int32p)
#define xdr_getint32(xdrs, int32p) \
(*(xdrs)->x_ops->x_getint32)(xdrs, int32p)
#define XDR_PUTINT32(xdrs, int32p) \
(*(xdrs)->x_ops->x_putint32)(xdrs, int32p)
#define xdr_putint32(xdrs, int32p) \
(*(xdrs)->x_ops->x_putint32)(xdrs, int32p)
#define XDR_GETLONG(xdrs, longp) \
(*(xdrs)->x_ops->x_getlong)(xdrs, longp)
#define xdr_getlong(xdrs, longp) \
(*(xdrs)->x_ops->x_getlong)(xdrs, longp)
#define XDR_PUTLONG(xdrs, longp) \
(*(xdrs)->x_ops->x_putlong)(xdrs, longp)
#define xdr_putlong(xdrs, longp) \
(*(xdrs)->x_ops->x_putlong)(xdrs, longp)
#define XDR_GETBYTES(xdrs, addr, len) \
(*(xdrs)->x_ops->x_getbytes)(xdrs, addr, len)
#define xdr_getbytes(xdrs, addr, len) \
(*(xdrs)->x_ops->x_getbytes)(xdrs, addr, len)
#define XDR_PUTBYTES(xdrs, addr, len) \
(*(xdrs)->x_ops->x_putbytes)(xdrs, addr, len)
#define xdr_putbytes(xdrs, addr, len) \
(*(xdrs)->x_ops->x_putbytes)(xdrs, addr, len)
#define XDR_GETPOS(xdrs) \
(*(xdrs)->x_ops->x_getpostn)(xdrs)
#define xdr_getpos(xdrs) \
(*(xdrs)->x_ops->x_getpostn)(xdrs)
#define XDR_SETPOS(xdrs, pos) \
(*(xdrs)->x_ops->x_setpostn)(xdrs, pos)
#define xdr_setpos(xdrs, pos) \
(*(xdrs)->x_ops->x_setpostn)(xdrs, pos)
#define XDR_INLINE(xdrs, len) \
(*(xdrs)->x_ops->x_inline)(xdrs, len)
#define xdr_inline(xdrs, len) \
(*(xdrs)->x_ops->x_inline)(xdrs, len)
#define XDR_DESTROY(xdrs) \
do { \
if ((xdrs)->x_ops->x_destroy) \
(*(xdrs)->x_ops->x_destroy)(xdrs); \
} while (0)
#define xdr_destroy(xdrs) \
do { \
if ((xdrs)->x_ops->x_destroy) \
(*(xdrs)->x_ops->x_destroy)(xdrs); \
} while (0)
/*
* Solaris strips the '_t' from these types -- not sure why.
* But, let's be compatible.
*/
#define xdr_rpcvers(xdrs, versp) xdr_u_int32(xdrs, versp)
#define xdr_rpcprog(xdrs, progp) xdr_u_int32(xdrs, progp)
#define xdr_rpcproc(xdrs, procp) xdr_u_int32(xdrs, procp)
#define xdr_rpcprot(xdrs, protp) xdr_u_int32(xdrs, protp)
#define xdr_rpcport(xdrs, portp) xdr_u_int32(xdrs, portp)
/*
* Support struct for discriminated unions.
* You create an array of xdrdiscrim structures, terminated with
* an entry with a null procedure pointer. The xdr_union routine gets
* the discriminant value and then searches the array of structures
* for a matching value. If a match is found the associated xdr routine
* is called to handle that part of the union. If there is
* no match, then a default routine may be called.
* If there is no match and no default routine it is an error.
*/
#define NULL_xdrproc_t ((xdrproc_t)0)
struct xdr_discrim
{
int value;
xdrproc_t proc;
};
/*
* In-line routines for fast encode/decode of primitive data types.
* Caveat emptor: these use single memory cycles to get the
* data from the underlying buffer, and will fail to operate
* properly if the data is not aligned. The standard way to use these
* is to say:
* if ((buf = XDR_INLINE(xdrs, count)) == NULL)
* return (FALSE);
* <<< macro calls >>>
* where ``count'' is the number of bytes of data occupied
* by the primitive data types.
*
* N.B. and frozen for all time: each data type here uses 4 bytes
* of external representation.
*/
#define IXDR_GET_INT32(buf) ((int32_t)ntohl((u_int32_t)*(buf)++))
#define IXDR_PUT_INT32(buf, v) (*(buf)++ =(int32_t)htonl((u_int32_t)v))
#define IXDR_GET_U_INT32(buf) ((uint32_t)IXDR_GET_INT32(buf))
#define IXDR_PUT_U_INT32(buf, v) IXDR_PUT_INT32((buf), ((int32_t)(v)))
/* Warning: inline long routines are broken for 64 bit platforms.
* Because the other inline routines below are implemented in terms
* of them, they are all also broken for 64 bit platforms.
*/
#define IXDR_GET_LONG(buf) ((long)ntohl((u_int32_t)*(buf)++))
#define IXDR_PUT_LONG(buf, v) (*(buf)++ =(int32_t)htonl((u_int32_t)v))
#define IXDR_GET_U_LONG(buf) ((u_long)IXDR_GET_LONG(buf))
#define IXDR_PUT_U_LONG(buf, v) IXDR_PUT_LONG((buf), (v))
#define IXDR_GET_BOOL(buf) ((bool_t)IXDR_GET_LONG(buf))
#define IXDR_GET_ENUM(buf, t) ((t)IXDR_GET_LONG(buf))
#define IXDR_GET_SHORT(buf) ((short)IXDR_GET_LONG(buf))
#define IXDR_GET_U_SHORT(buf) ((u_short)IXDR_GET_LONG(buf))
#define IXDR_PUT_BOOL(buf, v) IXDR_PUT_LONG((buf), (v))
#define IXDR_PUT_ENUM(buf, v) IXDR_PUT_LONG((buf), (v))
#define IXDR_PUT_SHORT(buf, v) IXDR_PUT_LONG((buf), (v))
#define IXDR_PUT_U_SHORT(buf, v) IXDR_PUT_LONG((buf), (v))
/*
* These are the "generic" xdr routines.
*/
extern bool_t xdr_void (void);
extern bool_t xdr_short (XDR *, short *);
extern bool_t xdr_u_short (XDR *, u_short *);
extern bool_t xdr_int (XDR *, int *);
extern bool_t xdr_u_int (XDR *, u_int *);
extern bool_t xdr_long (XDR *, long *);
extern bool_t xdr_u_long (XDR *, u_long *);
extern bool_t xdr_int8_t (XDR *, int8_t *);
extern bool_t xdr_uint8_t (XDR *, uint8_t *);
extern bool_t xdr_u_int8_t (XDR *, u_int8_t *);
extern bool_t xdr_int16_t (XDR *, int16_t *);
extern bool_t xdr_uint16_t (XDR *, uint16_t *);
extern bool_t xdr_u_int16_t (XDR *, u_int16_t *);
extern bool_t xdr_int32_t (XDR *, int32_t *);
extern bool_t xdr_uint32_t (XDR *, uint32_t *);
extern bool_t xdr_u_int32_t (XDR *, u_int32_t *);
#if defined(___int64_t_defined)
extern bool_t xdr_int64_t (XDR *, int64_t *);
extern bool_t xdr_uint64_t (XDR *, uint64_t *);
extern bool_t xdr_u_int64_t (XDR *, u_int64_t *);
#endif /* ___int64_t_defined */
extern bool_t xdr_bool (XDR *, bool_t *);
extern bool_t xdr_enum (XDR *, enum_t *);
extern bool_t xdr_array (XDR *, char **, u_int *, u_int, u_int, xdrproc_t);
extern bool_t xdr_bytes (XDR *, char **, u_int *, u_int);
extern bool_t xdr_opaque (XDR *, char *, u_int);
extern bool_t xdr_string (XDR *, char **, u_int);
extern bool_t xdr_union (XDR *, enum_t *, char *,
const struct xdr_discrim *, xdrproc_t);
extern bool_t xdr_char (XDR *, char *);
extern bool_t xdr_u_char (XDR *, u_char *);
extern bool_t xdr_vector (XDR *, char *, u_int, u_int, xdrproc_t);
extern bool_t xdr_float (XDR *, float *);
extern bool_t xdr_double (XDR *, double *);
/* extern bool_t xdr_quadruple (XDR *, long double *); */
extern bool_t xdr_reference (XDR *, char **, u_int, xdrproc_t);
extern bool_t xdr_pointer (XDR *, char **, u_int, xdrproc_t);
extern bool_t xdr_wrapstring (XDR *, char **);
#if defined(___int64_t_defined)
extern bool_t xdr_hyper (XDR *, quad_t *);
extern bool_t xdr_u_hyper (XDR *, u_quad_t *);
extern bool_t xdr_longlong_t (XDR *, quad_t *);
extern bool_t xdr_u_longlong_t (XDR *, u_quad_t *);
#endif /* ___int64_t_defined */
extern u_long xdr_sizeof (xdrproc_t, void *);
/*
* Common opaque bytes objects used by many rpc protocols;
* declared here due to commonality.
*/
#define MAX_NETOBJ_SZ 1024
struct netobj
{
u_int n_len;
char *n_bytes;
};
typedef struct netobj netobj;
extern bool_t xdr_netobj (XDR *, struct netobj *);
/*
* These are the public routines for the various implementations of
* xdr streams.
*/
/* XDR using memory buffers */
extern void xdrmem_create (XDR *, char *, u_int, enum xdr_op);
/* XDR using stdio library */
#if defined(_STDIO_H_)
extern void xdrstdio_create (XDR *, FILE *, enum xdr_op);
#endif
/* XDR pseudo records for tcp */
extern void xdrrec_create (XDR *, u_int, u_int, void *,
int (*) (void *, void *, int),
int (*) (void *, void *, int));
/* make end of xdr record */
extern bool_t xdrrec_endofrecord (XDR *, bool_t);
/* move to beginning of next record */
extern bool_t xdrrec_skiprecord (XDR *);
/* true if no more input */
extern bool_t xdrrec_eof (XDR *);
extern u_int xdrrec_readbytes (XDR *, caddr_t, u_int);
/* free memory buffers for xdr */
extern void xdr_free (xdrproc_t, void *);
#ifdef __cplusplus
}
#endif
#endif /* !_RPC_XDR_H */
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