reactos/dll/win32/libtirpc/tirpc/rpc/xdr.h

   1 /*      $NetBSD: xdr.h,v 1.19 2000/07/17 05:00:45 matt Exp $    */
   2
   3 /*
   4  * Copyright (c) 2009, Sun Microsystems, Inc.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions are met:
   9  * - Redistributions of source code must retain the above copyright notice,
  10  *   this list of conditions and the following disclaimer.
  11  * - Redistributions in binary form must reproduce the above copyright notice,
  12  *   this list of conditions and the following disclaimer in the documentation
  13  *   and/or other materials provided with the distribution.
  14  * - Neither the name of Sun Microsystems, Inc. nor the names of its
  15  *   contributors may be used to endorse or promote products derived
  16  *   from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  *      from: @(#)xdr.h 1.19 87/04/22 SMI
  31  *      from: @(#)xdr.h 2.2 88/07/29 4.0 RPCSRC
  32  * $FreeBSD: src/include/rpc/xdr.h,v 1.23 2003/03/07 13:19:40 nectar Exp $
  33  */
  34
  35 /*
  36  * xdr.h, External Data Representation Serialization Routines.
  37  *
  38  * Copyright (C) 1984, Sun Microsystems, Inc.
  39  */
  40
  41 #ifndef _TIRPC_XDR_H
  42 #define _TIRPC_XDR_H
  43 //#include <sys/cdefs.h>
  44 #include <stdio.h>
  45 //#include <netinet/in.h>
  46 // Rajout pour la définition des types
  47 #include <rpc/types.h>
  48
  49 /*
  50  * XDR provides a conventional way for converting between C data
  51  * types and an external bit-string representation.  Library supplied
  52  * routines provide for the conversion on built-in C data types.  These
  53  * routines and utility routines defined here are used to help implement
  54  * a type encode/decode routine for each user-defined type.
  55  *
  56  * Each data type provides a single procedure which takes two arguments:
  57  *
  58  *      bool_t
  59  *      xdrproc(xdrs, argresp)
  60  *              XDR *xdrs;
  61  *              <type> *argresp;
  62  *
  63  * xdrs is an instance of a XDR handle, to which or from which the data
  64  * type is to be converted.  argresp is a pointer to the structure to be
  65  * converted.  The XDR handle contains an operation field which indicates
  66  * which of the operations (ENCODE, DECODE * or FREE) is to be performed.
  67  *
  68  * XDR_DECODE may allocate space if the pointer argresp is null.  This
  69  * data can be freed with the XDR_FREE operation.
  70  *
  71  * We write only one procedure per data type to make it easy
  72  * to keep the encode and decode procedures for a data type consistent.
  73  * In many cases the same code performs all operations on a user defined type,
  74  * because all the hard work is done in the component type routines.
  75  * decode as a series of calls on the nested data types.
  76  */
  77
  78 /*
  79  * Xdr operations.  XDR_ENCODE causes the type to be encoded into the
  80  * stream.  XDR_DECODE causes the type to be extracted from the stream.
  81  * XDR_FREE can be used to release the space allocated by an XDR_DECODE
  82  * request.
  83  */
  84 enum xdr_op {
  85         XDR_ENCODE=0,
  86         XDR_DECODE=1,
  87         XDR_FREE=2
  88 };
  89
  90 /*
  91  * This is the number of bytes per unit of external data.
  92  */
  93 #define BYTES_PER_XDR_UNIT      (4)
  94 #define RNDUP(x)  ((((x) + BYTES_PER_XDR_UNIT - 1) / BYTES_PER_XDR_UNIT) \
  95                     * BYTES_PER_XDR_UNIT)
  96
  97 /*
  98  * The XDR handle.
  99  * Contains operation which is being applied to the stream,
 100  * an operations vector for the particular implementation (e.g. see xdr_mem.c),
 101  * and two private fields for the use of the particular implementation.
 102  */
 103 typedef struct __rpc_xdr {
 104         enum xdr_op     x_op;           /* operation; fast additional param */
 105         const struct xdr_ops {
 106                 /* get a long from underlying stream */
 107                 bool_t  (*x_getlong)(struct __rpc_xdr *, long *);
 108                 /* put a long to " */
 109                 bool_t  (*x_putlong)(struct __rpc_xdr *, const long *);
 110                 /* get some bytes from " */
 111                 bool_t  (*x_getbytes)(struct __rpc_xdr *, char *, u_int);
 112                 /* put some bytes to " */
 113                 bool_t  (*x_putbytes)(struct __rpc_xdr *, const char *, u_int);
 114                 /* returns bytes off from beginning */
 115                 u_int   (*x_getpostn)(struct __rpc_xdr *);
 116                 /* lets you reposition the stream */
 117                 bool_t  (*x_setpostn)(struct __rpc_xdr *, u_int);
 118                 /* buf quick ptr to buffered data */
 119                 int32_t *(*x_inline)(struct __rpc_xdr *, u_int);
 120                 /* free privates of this xdr_stream */
 121                 void    (*x_destroy)(struct __rpc_xdr *);
 122                 bool_t  (*x_control)(struct __rpc_xdr *, int, void *);
 123         } *x_ops;
 124         char *          x_public;       /* users' data */
 125         void *          x_private;      /* pointer to private data */
 126         char *          x_base;         /* private used for position info */
 127         u_int           x_handy;        /* extra private word */
 128 } XDR;
 129
 130 /*
 131  * A xdrproc_t exists for each data type which is to be encoded or decoded.
 132  *
 133  * The second argument to the xdrproc_t is a pointer to an opaque pointer.
 134  * The opaque pointer generally points to a structure of the data type
 135  * to be decoded.  If this pointer is 0, then the type routines should
 136  * allocate dynamic storage of the appropriate size and return it.
 137  */
 138 #ifdef _KERNEL
 139 typedef bool_t (*xdrproc_t)(XDR *, void *, u_int);
 140 #else
 141 /*
 142  * XXX can't actually prototype it, because some take three args!!!
 143  */
 144 typedef bool_t (*xdrproc_t)(XDR *, ...);
 145 #endif
 146
 147 /*
 148  * Operations defined on a XDR handle
 149  *
 150  * XDR          *xdrs;
 151  * long         *longp;
 152  * char *        addr;
 153  * u_int         len;
 154  * u_int         pos;
 155  */
 156 #define XDR_GETLONG(xdrs, longp)                        \
 157         (*(xdrs)->x_ops->x_getlong)(xdrs, longp)
 158 #define xdr_getlong(xdrs, longp)                        \
 159         (*(xdrs)->x_ops->x_getlong)(xdrs, longp)
 160
 161 #define XDR_PUTLONG(xdrs, longp)                        \
 162         (*(xdrs)->x_ops->x_putlong)(xdrs, longp)
 163 #define xdr_putlong(xdrs, longp)                        \
 164         (*(xdrs)->x_ops->x_putlong)(xdrs, longp)
 165
 166 static __inline int
 167 xdr_getint32(XDR *xdrs, int32_t *ip)
 168 {
 169         long l;
 170
 171         if (!xdr_getlong(xdrs, &l))
 172                 return (FALSE);
 173         *ip = (int32_t)l;
 174         return (TRUE);
 175 }
 176
 177 static __inline int
 178 xdr_putint32(XDR *xdrs, int32_t *ip)
 179 {
 180         long l;
 181
 182         l = (long)*ip;
 183         return xdr_putlong(xdrs, &l);
 184 }
 185
 186 #define XDR_GETINT32(xdrs, int32p)      xdr_getint32(xdrs, int32p)
 187 #define XDR_PUTINT32(xdrs, int32p)      xdr_putint32(xdrs, int32p)
 188
 189 #define XDR_GETBYTES(xdrs, addr, len)                   \
 190         (*(xdrs)->x_ops->x_getbytes)(xdrs, addr, len)
 191 #define xdr_getbytes(xdrs, addr, len)                   \
 192         (*(xdrs)->x_ops->x_getbytes)(xdrs, addr, len)
 193
 194 #define XDR_PUTBYTES(xdrs, addr, len)                   \
 195         (*(xdrs)->x_ops->x_putbytes)(xdrs, addr, len)
 196 #define xdr_putbytes(xdrs, addr, len)                   \
 197         (*(xdrs)->x_ops->x_putbytes)(xdrs, addr, len)
 198
 199 #define XDR_GETPOS(xdrs)                                \
 200         (*(xdrs)->x_ops->x_getpostn)(xdrs)
 201 #define xdr_getpos(xdrs)                                \
 202         (*(xdrs)->x_ops->x_getpostn)(xdrs)
 203
 204 #define XDR_SETPOS(xdrs, pos)                           \
 205         (*(xdrs)->x_ops->x_setpostn)(xdrs, pos)
 206 #define xdr_setpos(xdrs, pos)                           \
 207         (*(xdrs)->x_ops->x_setpostn)(xdrs, pos)
 208
 209 #define XDR_INLINE(xdrs, len)                           \
 210         (*(xdrs)->x_ops->x_inline)(xdrs, len)
 211 #define xdr_inline(xdrs, len)                           \
 212         (*(xdrs)->x_ops->x_inline)(xdrs, len)
 213
 214 #define XDR_DESTROY(xdrs)                               \
 215         if ((xdrs)->x_ops->x_destroy)                   \
 216                 (*(xdrs)->x_ops->x_destroy)(xdrs)
 217 #define xdr_destroy(xdrs)                               \
 218         if ((xdrs)->x_ops->x_destroy)                   \
 219                 (*(xdrs)->x_ops->x_destroy)(xdrs)
 220
 221 #define XDR_CONTROL(xdrs, req, op)                      \
 222         if ((xdrs)->x_ops->x_control)                   \
 223                 (*(xdrs)->x_ops->x_control)(xdrs, req, op)
 224 #define xdr_control(xdrs, req, op) XDR_CONTROL(xdrs, req, op)
 225
 226 /*
 227  * Solaris strips the '_t' from these types -- not sure why.
 228  * But, let's be compatible.
 229  */
 230 #define xdr_rpcvers(xdrs, versp) xdr_u_int32(xdrs, versp)
 231 #define xdr_rpcprog(xdrs, progp) xdr_u_int32(xdrs, progp)
 232 #define xdr_rpcproc(xdrs, procp) xdr_u_int32(xdrs, procp)
 233 #define xdr_rpcprot(xdrs, protp) xdr_u_int32(xdrs, protp)
 234 #define xdr_rpcport(xdrs, portp) xdr_u_int32(xdrs, portp)
 235
 236 /*
 237  * Support struct for discriminated unions.
 238  * You create an array of xdrdiscrim structures, terminated with
 239  * an entry with a null procedure pointer.  The xdr_union routine gets
 240  * the discriminant value and then searches the array of structures
 241  * for a matching value.  If a match is found the associated xdr routine
 242  * is called to handle that part of the union.  If there is
 243  * no match, then a default routine may be called.
 244  * If there is no match and no default routine it is an error.
 245  */
 246 #define NULL_xdrproc_t ((xdrproc_t)0)
 247 struct xdr_discrim {
 248         int     value;
 249         xdrproc_t proc;
 250 };
 251
 252 /*
 253  * In-line routines for fast encode/decode of primitive data types.
 254  * Caveat emptor: these use single memory cycles to get the
 255  * data from the underlying buffer, and will fail to operate
 256  * properly if the data is not aligned.  The standard way to use these
 257  * is to say:
 258  *      if ((buf = XDR_INLINE(xdrs, count)) == NULL)
 259  *              return (FALSE);
 260  *      <<< macro calls >>>
 261  * where ``count'' is the number of bytes of data occupied
 262  * by the primitive data types.
 263  *
 264  * N.B. and frozen for all time: each data type here uses 4 bytes
 265  * of external representation.
 266  */
 267 #define IXDR_GET_INT32(buf)             ((int32_t)ntohl((u_int32_t)*(buf)++))
 268 #define IXDR_PUT_INT32(buf, v)          (*(buf)++ =(int32_t)htonl((u_int32_t)v))
 269 #define IXDR_GET_U_INT32(buf)           ((u_int32_t)IXDR_GET_INT32(buf))
 270 #define IXDR_PUT_U_INT32(buf, v)        IXDR_PUT_INT32((buf), ((int32_t)(v)))
 271
 272 #define IXDR_GET_LONG(buf)              ((long)ntohl((u_int32_t)*(buf)++))
 273 #define IXDR_PUT_LONG(buf, v)           (*(buf)++ =(int32_t)htonl((u_int32_t)v))
 274
 275 #define IXDR_GET_BOOL(buf)              ((bool_t)IXDR_GET_LONG(buf))
 276 #define IXDR_GET_ENUM(buf, t)           ((t)IXDR_GET_LONG(buf))
 277 #define IXDR_GET_U_LONG(buf)            ((u_long)IXDR_GET_LONG(buf))
 278 #define IXDR_GET_SHORT(buf)             ((short)IXDR_GET_LONG(buf))
 279 #define IXDR_GET_U_SHORT(buf)           ((u_short)IXDR_GET_LONG(buf))
 280
 281 #define IXDR_PUT_BOOL(buf, v)           IXDR_PUT_LONG((buf), (v))
 282 #define IXDR_PUT_ENUM(buf, v)           IXDR_PUT_LONG((buf), (v))
 283 #define IXDR_PUT_U_LONG(buf, v)         IXDR_PUT_LONG((buf), (v))
 284 #define IXDR_PUT_SHORT(buf, v)          IXDR_PUT_LONG((buf), (v))
 285 #define IXDR_PUT_U_SHORT(buf, v)        IXDR_PUT_LONG((buf), (v))
 286
 287 /*
 288  * These are the "generic" xdr routines.
 289  */
 290 __BEGIN_DECLS
 291 extern bool_t   xdr_void(void);
 292 extern bool_t   xdr_int(XDR *, int *);
 293 extern bool_t   xdr_u_int(XDR *, u_int *);
 294 extern bool_t   xdr_long(XDR *, long *);
 295 extern bool_t   xdr_u_long(XDR *, u_long *);
 296 extern bool_t   xdr_short(XDR *, short *);
 297 extern bool_t   xdr_u_short(XDR *, u_short *);
 298 extern bool_t   xdr_int16_t(XDR *, int16_t *);
 299 extern bool_t   xdr_u_int16_t(XDR *, u_int16_t *);
 300 extern bool_t   xdr_int32_t(XDR *, int32_t *);
 301 extern bool_t   xdr_u_int32_t(XDR *, u_int32_t *);
 302 extern bool_t   xdr_int64_t(XDR *, int64_t *);
 303 extern bool_t   xdr_u_int64_t(XDR *, u_int64_t *);
 304 extern bool_t   xdr_bool(XDR *, bool_t *);
 305 extern bool_t   xdr_enum(XDR *, enum_t *);
 306 extern bool_t   xdr_array(XDR *, char **, u_int *, u_int, u_int, xdrproc_t);
 307 extern bool_t   xdr_bytes(XDR *, char **, u_int *, u_int);
 308 extern bool_t   xdr_opaque(XDR *, char *, u_int);
 309 extern bool_t   xdr_string(XDR *, char **, u_int);
 310 extern bool_t   xdr_union(XDR *, enum_t *, char *, const struct xdr_discrim *, xdrproc_t);
 311 extern bool_t   xdr_char(XDR *, char *);
 312 extern bool_t   xdr_u_char(XDR *, u_char *);
 313 extern bool_t   xdr_vector(XDR *, char *, u_int, u_int, xdrproc_t);
 314 extern bool_t   xdr_float(XDR *, float *);
 315 extern bool_t   xdr_double(XDR *, double *);
 316 extern bool_t   xdr_quadruple(XDR *, long double *);
 317 extern bool_t   xdr_reference(XDR *, char **, u_int, xdrproc_t);
 318 extern bool_t   xdr_pointer(XDR *, char **, u_int, xdrproc_t);
 319 extern bool_t   xdr_wrapstring(XDR *, char **);
 320 extern void     xdr_free(xdrproc_t, void *);
 321 extern bool_t   xdr_hyper(XDR *, quad_t *);
 322 extern bool_t   xdr_u_hyper(XDR *, u_quad_t *);
 323 extern bool_t   xdr_longlong_t(XDR *, quad_t *);
 324 extern bool_t   xdr_u_longlong_t(XDR *, u_quad_t *);
 325 __END_DECLS
 326
 327 /*
 328  * Common opaque bytes objects used by many rpc protocols;
 329  * declared here due to commonality.
 330  */
 331 #define MAX_NETOBJ_SZ 1024
 332 struct netobj {
 333         u_int   n_len;
 334         char    *n_bytes;
 335 };
 336 typedef struct netobj netobj;
 337 extern bool_t   xdr_netobj(XDR *, struct netobj *);
 338
 339 /*
 340  * These are the public routines for the various implementations of
 341  * xdr streams.
 342  */
 343 __BEGIN_DECLS
 344 /* XDR using memory buffers */
 345 extern void   xdrmem_create(XDR *, char *, u_int, enum xdr_op);
 346
 347 /* XDR using stdio library */
 348 extern void   xdrstdio_create(XDR *, FILE *, enum xdr_op);
 349
 350 /* XDR pseudo records for tcp */
 351 extern void   xdrrec_create(XDR *, u_int, u_int, void *,
 352                             int (*)(void *, void *, int),
 353                             int (*)(void *, void *, int));
 354
 355 /* make end of xdr record */
 356 extern bool_t xdrrec_endofrecord(XDR *, int);
 357 extern int32_t *xdrrec_getoutbase(XDR *);
 358
 359 /* move to beginning of next record */
 360 extern bool_t xdrrec_skiprecord(XDR *);
 361 extern void xdrrec_setlastfrag(XDR *);
 362
 363 /* true if no more input */
 364 extern bool_t xdrrec_eof(XDR *);
 365 extern u_int xdrrec_readbytes(XDR *, caddr_t, u_int);
 366 __END_DECLS
 367
 368 #endif /* !_TIRPC_XDR_H */