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freebsd/include/rpc/xdr.h
Peter Wemm c447342094 Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL" 
is an application space macro and the applications are supposed to be free
to use it as they please (but cannot).  This is consistant with the other
BSD's who made this change quite some time ago.  More commits to come.
1999-12-29 05:07:58 +00:00

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/*
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
* unrestricted use provided that this legend is included on all tape
* media and as a part of the software program in whole or part. Users
* may copy or modify Sun RPC without charge, but are not authorized
* to license or distribute it to anyone else except as part of a product or
* program developed by the user.
*
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
* WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
*
* Sun RPC is provided with no support and without any obligation on the
* part of Sun Microsystems, Inc. to assist in its use, correction,
* modification or enhancement.
*
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
* OR ANY PART THEREOF.
*
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
* or profits or other special, indirect and consequential damages, even if
* Sun has been advised of the possibility of such damages.
*
* Sun Microsystems, Inc.
* 2550 Garcia Avenue
* Mountain View, California 94043
*
* from: @(#)xdr.h 1.19 87/04/22 SMI
* from: @(#)xdr.h 2.2 88/07/29 4.0 RPCSRC
* $FreeBSD$
*/
/*
* xdr.h, External Data Representation Serialization Routines.
*
* Copyright (C) 1984, Sun Microsystems, Inc.
*/
#ifndef _RPC_XDR_H
#define _RPC_XDR_H
#include <sys/cdefs.h>
/*
* 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(xdrs, argresp)
* 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)
#define RNDUP(x) ((((x) + BYTES_PER_XDR_UNIT - 1) / BYTES_PER_XDR_UNIT) \
* BYTES_PER_XDR_UNIT)
/*
* 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 */
struct xdr_ops {
/* get a long from underlying stream */
bool_t (*x_getlong) __P((struct __rpc_xdr *, long *));
/* put a long to underlying stream */
bool_t (*x_putlong) __P((struct __rpc_xdr *, long *));
/* get some bytes from underlying stream */
bool_t (*x_getbytes) __P((struct __rpc_xdr *, caddr_t, u_int));
/* put some bytes to underlying stream */
bool_t (*x_putbytes) __P((struct __rpc_xdr *, caddr_t, u_int));
/* returns bytes off from beginning */
u_int (*x_getpostn) __P((struct __rpc_xdr *));
/* lets you reposition the stream */
bool_t (*x_setpostn) __P((struct __rpc_xdr *, u_int));
/* buf quick ptr to buffered data */
int32_t *(*x_inline) __P((struct __rpc_xdr *, u_int));
/* free privates of this xdr_stream */
void (*x_destroy) __P((struct __rpc_xdr *));
} *x_ops;
caddr_t x_public; /* users' data */
caddr_t x_private; /* pointer to private data */
caddr_t x_base; /* private used for position info */
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.
*/
#ifdef _KERNEL
typedef bool_t (*xdrproc_t) __P((XDR *, void *, u_int));
#else
/*
* XXX can't actually prototype it, because some take two args!!!
*/
typedef bool_t (*xdrproc_t) __P((/* XDR *, void *, u_int */));
#endif
/*
* Operations defined on a XDR handle
*
* XDR *xdrs;
* long *longp;
* caddr_t addr;
* u_int len;
* u_int pos;
*/
#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) \
if ((xdrs)->x_ops->x_destroy) \
(*(xdrs)->x_ops->x_destroy)(xdrs)
#define xdr_destroy(xdrs) \
if ((xdrs)->x_ops->x_destroy) \
(*(xdrs)->x_ops->x_destroy)(xdrs)
/*
* Support struct for discriminated unions.
* You create an array of xdrdiscrim structures, terminated with
* a 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_LONG(buf) ((long)ntohl((u_long)*(buf)++))
#define IXDR_PUT_LONG(buf, v) (*(buf)++ = (long)htonl((u_long)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_U_LONG(buf) ((u_long)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), ((long)(v)))
#define IXDR_PUT_ENUM(buf, v) IXDR_PUT_LONG((buf), ((long)(v)))
#define IXDR_PUT_U_LONG(buf, v) IXDR_PUT_LONG((buf), ((long)(v)))
#define IXDR_PUT_SHORT(buf, v) IXDR_PUT_LONG((buf), ((long)(v)))
#define IXDR_PUT_U_SHORT(buf, v) IXDR_PUT_LONG((buf), ((long)(v)))
/*
* These are the "generic" xdr routines.
*/
__BEGIN_DECLS
extern bool_t xdr_void __P((void));
extern bool_t xdr_int __P((XDR *, int *));
extern bool_t xdr_u_int __P((XDR *, u_int *));
extern bool_t xdr_long __P((XDR *, long *));
extern bool_t xdr_u_long __P((XDR *, u_long *));
extern bool_t xdr_short __P((XDR *, short *));
extern bool_t xdr_u_short __P((XDR *, u_short *));
extern bool_t xdr_int16_t __P((XDR *, int16_t *));
extern bool_t xdr_u_int16_t __P((XDR *, u_int16_t *));
extern bool_t xdr_int32_t __P((XDR *, int32_t *));
extern bool_t xdr_u_int32_t __P((XDR *, u_int32_t *));
extern bool_t xdr_int64_t __P((XDR *, int64_t *));
extern bool_t xdr_u_int64_t __P((XDR *, u_int64_t *));
extern bool_t xdr_bool __P((XDR *, bool_t *));
extern bool_t xdr_enum __P((XDR *, enum_t *));
extern bool_t xdr_array __P((XDR *, char **, u_int *, u_int, u_int, xdrproc_t));
extern bool_t xdr_bytes __P((XDR *, char **, u_int *, u_int));
extern bool_t xdr_opaque __P((XDR *, caddr_t, u_int));
extern bool_t xdr_string __P((XDR *, char **, u_int));
extern bool_t xdr_union __P((XDR *, enum_t *, char *, struct xdr_discrim *, xdrproc_t));
extern unsigned long xdr_sizeof __P((xdrproc_t, void *));
extern bool_t xdr_char __P((XDR *, char *));
extern bool_t xdr_u_char __P((XDR *, u_char *));
extern bool_t xdr_vector __P((XDR *, char *, u_int, u_int, xdrproc_t));
extern bool_t xdr_float __P((XDR *, float *));
extern bool_t xdr_double __P((XDR *, double *));
extern bool_t xdr_reference __P((XDR *, caddr_t *, u_int, xdrproc_t));
extern bool_t xdr_pointer __P((XDR *, caddr_t *, u_int, xdrproc_t));
extern bool_t xdr_wrapstring __P((XDR *, char **));
extern void xdr_free __P((xdrproc_t, char *));
__END_DECLS
/*
* 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 __P((XDR *, struct netobj *));
/*
* These are the public routines for the various implementations of
* xdr streams.
*/
__BEGIN_DECLS
/* XDR using memory buffers */
extern void xdrmem_create __P((XDR *, char *, u_int, enum xdr_op));
#ifdef _STDIO_H_
/* XDR using stdio library */
extern void xdrstdio_create __P((XDR *, FILE *, enum xdr_op));
#endif
/* XDR pseudo records for tcp */
extern void xdrrec_create __P((XDR *, u_int, u_int, char *,
int (*) __P((caddr_t, caddr_t, int)),
int (*) __P((caddr_t, caddr_t, int))));
/* make end of xdr record */
extern bool_t xdrrec_endofrecord __P((XDR *, int));
/* move to beginning of next record */
extern bool_t xdrrec_skiprecord __P((XDR *));
/* true if no more input */
extern bool_t xdrrec_eof __P((XDR *));
__END_DECLS
#endif /* !_RPC_XDR_H */
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