292 lines
10 KiB
C
292 lines
10 KiB
C
/*
|
|
* 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
|
|
* $Id: xdr.h,v 1.3 1995/05/30 04:55:38 rgrimes Exp $
|
|
*/
|
|
|
|
/*
|
|
* 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)
|
|
|
|
/*
|
|
* 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 *, caddr_t *);
|
|
*/
|
|
typedef bool_t (*xdrproc_t)();
|
|
|
|
/*
|
|
* 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 {
|
|
enum xdr_op x_op; /* operation; fast additional param */
|
|
struct xdr_ops {
|
|
bool_t (*x_getlong)(); /* get a long from underlying stream */
|
|
bool_t (*x_putlong)(); /* put a long to " */
|
|
bool_t (*x_getbytes)();/* get some bytes from " */
|
|
bool_t (*x_putbytes)();/* put some bytes to " */
|
|
u_int (*x_getpostn)();/* returns bytes off from beginning */
|
|
bool_t (*x_setpostn)();/* lets you reposition the stream */
|
|
long * (*x_inline)(); /* buf quick ptr to buffered data */
|
|
void (*x_destroy)(); /* free privates of this xdr_stream */
|
|
} *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;
|
|
|
|
/*
|
|
* 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_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 bool_t xdr_char __P((XDR *, char *));
|
|
extern bool_t xdr_u_char __P((XDR *, 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();
|
|
|
|
/*
|
|
* 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 (*)(), 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 */
|