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/* @(#)xdr.h 2.2 88/07/29 4.0 RPCSRC */
/*
* Copyright (c) 2010, Oracle America, 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 the "Oracle America, 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.
*/
/* @(#)xdr.h 1.19 87/04/22 SMI */
/*
* xdr.h, External Data Representation Serialization Routines.
*/
#ifndef GSSRPC_XDR_H
#define GSSRPC_XDR_H
#include <stdio.h> /* for FILE */
GSSRPC__BEGIN_DECLS
/*
* 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 *);
*
* XXX can't actually prototype it, because some take three args!!!
*/
typedef bool_t (*xdrproc_t)();
/*
* The XDR handle.
* Contains operation which is being applied to the stream,
* an operations vector for the paticular implementation (e.g. see xdr_mem.c),
* and two private fields for the use of the particular impelementation.
*/
typedef struct XDR {
enum xdr_op x_op; /* operation; fast additional param */
struct xdr_ops {
/* get a long from underlying stream */
bool_t (*x_getlong)(struct XDR *, long *);
/* put a long to underlying stream */
bool_t (*x_putlong)(struct XDR *, long *);
/* get some bytes from underlying stream */
bool_t (*x_getbytes)(struct XDR *, caddr_t, u_int);
/* put some bytes to underlying stream */
bool_t (*x_putbytes)(struct XDR *, caddr_t, u_int);
/* returns bytes off from beginning */
u_int (*x_getpostn)(struct XDR *);
/* lets you reposition the stream */
bool_t (*x_setpostn)(struct XDR *, u_int);
/* buf quick ptr to buffered data */
rpc_inline_t *(*x_inline)(struct XDR *, int);
/* free privates of this xdr_stream */
void (*x_destroy)(struct XDR *);
} *x_ops;
caddr_t x_public; /* users' data */
void * 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;
* int32_t *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 primitve 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)IXDR_GET_U_INT32(buf))
#define IXDR_PUT_INT32(buf, v) IXDR_PUT_U_INT32((buf),((uint32_t)(v)))
#define IXDR_GET_U_INT32(buf) (ntohl((uint32_t)*(buf)++))
#define IXDR_PUT_U_INT32(buf, v) (*(buf)++ = (int32_t)htonl((v)))
#define IXDR_GET_LONG(buf) ((long)IXDR_GET_INT32(buf))
#define IXDR_PUT_LONG(buf, v) IXDR_PUT_U_INT32((buf),((uint32_t)(v)))
#define IXDR_GET_BOOL(buf) ((bool_t)IXDR_GET_LONG(buf))
#define IXDR_GET_ENUM(buf, t) ((t)IXDR_GET_INT32(buf))
#define IXDR_GET_U_LONG(buf) ((u_long)IXDR_GET_U_INT32(buf))
#define IXDR_GET_SHORT(buf) ((short)IXDR_GET_INT32(buf))
#define IXDR_GET_U_SHORT(buf) ((u_short)IXDR_GET_U_INT32(buf))
#define IXDR_PUT_BOOL(buf, v) IXDR_PUT_INT32((buf),((int32_t)(v)))
#define IXDR_PUT_ENUM(buf, v) IXDR_PUT_INT32((buf),((int32_t)(v)))
#define IXDR_PUT_U_LONG(buf, v) IXDR_PUT_U_INT32((buf),((uint32_t)(v)))
#define IXDR_PUT_SHORT(buf, v) IXDR_PUT_INT32((buf),((int32_t)(v)))
#define IXDR_PUT_U_SHORT(buf, v) IXDR_PUT_U_INT32((buf),((uint32_t)(v)))
/*
* These are the "generic" xdr routines.
*/
extern bool_t xdr_void(XDR *, void *);
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_short(XDR *, short *);
extern bool_t xdr_u_short(XDR *, u_short *);
extern bool_t xdr_bool(XDR *, bool_t *);
extern bool_t xdr_enum(XDR *, enum_t *);
extern bool_t xdr_array(XDR *, caddr_t *, 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 *, caddr_t, u_int);
extern bool_t xdr_string(XDR *, char **, u_int);
extern bool_t xdr_union(XDR *, enum_t *, char *, 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_reference(XDR *, caddr_t *, u_int, xdrproc_t);
extern bool_t xdr_pointer(XDR *, char **, u_int, xdrproc_t);
extern bool_t xdr_wrapstring(XDR *, char **);
extern unsigned long xdr_sizeof(xdrproc_t, void *);
#define xdr_rpcprog xdr_u_int32
#define xdr_rpcvers xdr_u_int32
#define xdr_rpcprot xdr_u_int32
#define xdr_rpcproc xdr_u_int32
#define xdr_rpcport xdr_u_int32
/*
* Common opaque bytes objects used by many rpc protocols;
* declared here due to commonality.
*/
#define MAX_NETOBJ_SZ 2048
struct netobj {
u_int n_len;
char *n_bytes;
};
typedef struct netobj netobj;
extern bool_t xdr_netobj(XDR *, struct netobj *);
extern bool_t xdr_int32(XDR *, int32_t *);
extern bool_t xdr_u_int32(XDR *, uint32_t *);
/*
* These are the public routines for the various implementations of
* xdr streams.
*/
/* XDR allocating memory buffer */
extern void xdralloc_create(XDR *, enum xdr_op);
/* destroy xdralloc, save buf */
extern void xdralloc_release(XDR *);
/* get buffer from xdralloc */
extern caddr_t xdralloc_getdata(XDR *);
/* XDR using memory buffers */
extern void xdrmem_create(XDR *, caddr_t, u_int, enum xdr_op);
/* XDR using stdio library */
extern void xdrstdio_create(XDR *, FILE *, enum xdr_op);
/* XDR pseudo records for tcp */
extern void xdrrec_create(XDR *xdrs, u_int, u_int, caddr_t,
int (*) (caddr_t, caddr_t, int),
int (*) (caddr_t, caddr_t, 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 *xdrs);
/* true if no more input */
extern bool_t xdrrec_eof (XDR *xdrs);
/* free memory buffers for xdr */
extern void xdr_free (xdrproc_t, void *);
GSSRPC__END_DECLS
#endif /* !defined(GSSRPC_XDR_H) */