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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, MERCHANTIBILITY 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

 */

/*

 * xdr.h, External Data Representation Serialization Routines.

 *

 * Copyright (C) 1984, Sun Microsystems, Inc.

 */

#ifndef _RPC_XDR_H

#define _RPC_XDR_H 1

#ifdef _LIBC

/* Some adjustments to make the libc source from glibc

 * compile more easily with uClibc... */

#ifndef __FORCE_GLIBC

#define __FORCE_GLIBC

#endif

#ifndef _GNU_SOUCE

#define _GNU_SOUCE

#endif

#define _(X)    X

#endif

#include <features.h>

#include <sys/types.h>

#include <rpc/types.h>

/* We need FILE.  */

#include <stdio.h>

__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)

/*

 * This only works if the above is a power of 2.  But it's defined to be

 * 4 by the appropriate RFCs.  So it will work.  And it's normally quicker

 * than the old routine.

 */

#if 1

#define RNDUP(x)  (((x) + BYTES_PER_XDR_UNIT - 1) & ~(BYTES_PER_XDR_UNIT - 1))

#else /* this is the old routine */

#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 XDR XDR;

struct XDR

  {

    enum xdr_op x_op;           /* operation; fast additional param */

    struct xdr_ops

      {

        bool_t (*x_getlong) (XDR *__xdrs, long *__lp);

        /* get a long from underlying stream */

        bool_t (*x_putlong) (XDR *__xdrs, __const long *__lp);

        /* put a long to " */

        bool_t (*x_getbytes) (XDR *__xdrs, caddr_t __addr, u_int __len);

        /* get some bytes from " */

        bool_t (*x_putbytes) (XDR *__xdrs, __const char *__addr, u_int __len);

        /* put some bytes to " */

        u_int (*x_getpostn) (__const XDR *__xdrs);

        /* returns bytes off from beginning */

        bool_t (*x_setpostn) (XDR *__xdrs, u_int __pos);

        /* lets you reposition the stream */

        int32_t *(*x_inline) (XDR *__xdrs, int __len);

        /* buf quick ptr to buffered data */

        void (*x_destroy) (XDR *__xdrs);

        /* free privates of this xdr_stream */

        bool_t (*x_getint32) (XDR *__xdrs, int32_t *__ip);

        /* get a int from underlying stream */

        bool_t (*x_putint32) (XDR *__xdrs, __const int32_t *__ip);

        /* put a int to " */

      }

     *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 */

  };

/*

 * 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) (XDR *, void *,...);

/*

 * Operations defined on a XDR handle

 *

 * XDR          *xdrs;

 * int32_t      *int32p;

 * long         *longp;

 * caddr_t       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)

/*

 * 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;

};

/*

 * Inline 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((uint32_t)*(buf)++))

#define IXDR_PUT_INT32(buf, v)        (*(buf)++ = (int32_t)htonl((uint32_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: The IXDR_*_LONG defines are removed by Sun for new platforms

 * and shouldn't be used any longer. Code which use this defines or longs

 * in the RPC code will not work on 64bit Solaris platforms !

 */

#define IXDR_GET_LONG(buf) \

        ((long)ntohl((u_long)*__extension__((u_int32_t*)(buf))++))

#define IXDR_PUT_LONG(buf, v) \

        (*__extension__((u_int32_t*)(buf))++ = (long)htonl((u_long)(v)))

#define IXDR_GET_U_LONG(buf)          ((u_long)IXDR_GET_LONG(buf))

#define IXDR_PUT_U_LONG(buf, v)       IXDR_PUT_LONG(buf, (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_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_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.

 * None of these can have const applied because it's not possible to

 * know whether the call is a read or a write to the passed parameter

 * also, the XDR structure is always updated by some of these calls.

 */

extern bool_t xdr_void (void) __THROW;

extern bool_t xdr_short (XDR *__xdrs, short *__sp) __THROW;

extern bool_t xdr_u_short (XDR *__xdrs, u_short *__usp) __THROW;

extern bool_t xdr_int (XDR *__xdrs, int *__ip) __THROW;

extern bool_t xdr_u_int (XDR *__xdrs, u_int *__up) __THROW;

extern bool_t xdr_long (XDR *__xdrs, long *__lp) __THROW;

extern bool_t xdr_u_long (XDR *__xdrs, u_long *__ulp) __THROW;

extern bool_t xdr_hyper (XDR *__xdrs, quad_t *__llp) __THROW;

extern bool_t xdr_u_hyper (XDR *__xdrs, u_quad_t *__ullp) __THROW;

extern bool_t xdr_longlong_t (XDR *__xdrs, quad_t *__llp) __THROW;

extern bool_t xdr_u_longlong_t (XDR *__xdrs, u_quad_t *__ullp) __THROW;

extern bool_t xdr_int8_t (XDR *__xdrs, int8_t *__ip) __THROW;

extern bool_t xdr_uint8_t (XDR *__xdrs, uint8_t *__up) __THROW;

extern bool_t xdr_int16_t (XDR *__xdrs, int16_t *__ip) __THROW;

extern bool_t xdr_uint16_t (XDR *__xdrs, uint16_t *__up) __THROW;

extern bool_t xdr_int32_t (XDR *__xdrs, int32_t *__ip) __THROW;

extern bool_t xdr_uint32_t (XDR *__xdrs, uint32_t *__up) __THROW;

extern bool_t xdr_int64_t (XDR *__xdrs, int64_t *__ip) __THROW;

extern bool_t xdr_uint64_t (XDR *__xdrs, uint64_t *__up) __THROW;

extern bool_t xdr_bool (XDR *__xdrs, bool_t *__bp) __THROW;

extern bool_t xdr_enum (XDR *__xdrs, enum_t *__ep) __THROW;

extern bool_t xdr_array (XDR * _xdrs, caddr_t *__addrp, u_int *__sizep,

                         u_int __maxsize, u_int __elsize, xdrproc_t __elproc)

     __THROW;

extern bool_t xdr_bytes (XDR *__xdrs, char **__cpp, u_int *__sizep,

                         u_int __maxsize) __THROW;

extern bool_t xdr_opaque (XDR *__xdrs, caddr_t __cp, u_int __cnt) __THROW;

extern bool_t xdr_string (XDR *__xdrs, char **__cpp, u_int __maxsize) __THROW;

extern bool_t xdr_union (XDR *__xdrs, enum_t *__dscmp, char *__unp,

                         __const struct xdr_discrim *__choices,

                         xdrproc_t dfault) __THROW;

extern bool_t xdr_char (XDR *__xdrs, char *__cp) __THROW;

extern bool_t xdr_u_char (XDR *__xdrs, u_char *__cp) __THROW;

extern bool_t xdr_vector (XDR *__xdrs, char *__basep, u_int __nelem,

                          u_int __elemsize, xdrproc_t __xdr_elem) __THROW;

extern bool_t xdr_float (XDR *__xdrs, float *__fp) __THROW;

extern bool_t xdr_double (XDR *__xdrs, double *__dp) __THROW;

extern bool_t xdr_reference (XDR *__xdrs, caddr_t *__xpp, u_int __size,

                             xdrproc_t __proc) __THROW;

extern bool_t xdr_pointer (XDR *__xdrs, char **__objpp,

                           u_int __obj_size, xdrproc_t __xdr_obj) __THROW;

extern bool_t xdr_wrapstring (XDR *__xdrs, char **__cpp) __THROW;

extern u_long xdr_sizeof (xdrproc_t, void *) __THROW;

/*

 * 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 *__xdrs, struct netobj *__np) __THROW;

/*

 * These are the public routines for the various implementations of

 * xdr streams.

 */

/* XDR using memory buffers */

extern void xdrmem_create (XDR *__xdrs, __const caddr_t __addr,

                           u_int __size, enum xdr_op __xop) __THROW;

/* XDR using stdio library */

extern void xdrstdio_create (XDR *__xdrs, FILE *__file, enum xdr_op __xop)

     __THROW;

/* XDR pseudo records for tcp */

extern void xdrrec_create (XDR *__xdrs, u_int __sendsize,

                           u_int __recvsize, caddr_t __tcp_handle,

                           int (*__readit) (char *, char *, int),

                           int (*__writeit) (char *, char *, int)) __THROW;

/* make end of xdr record */

extern bool_t xdrrec_endofrecord (XDR *__xdrs, bool_t __sendnow) __THROW;

/* move to beginning of next record */

extern bool_t xdrrec_skiprecord (XDR *__xdrs) __THROW;

/* true if no more input */

extern bool_t xdrrec_eof (XDR *__xdrs) __THROW;

/* free memory buffers for xdr */

extern void xdr_free (xdrproc_t __proc, char *__objp) __THROW;

__END_DECLS

#endif /* rpc/xdr.h */