xref: /illumos-gate/usr/src/uts/common/rpc/xdr.h (revision 66582b606a8194f7f3ba5b3a3a6dca5b0d346361)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2016 Nexenta Systems, Inc.  All rights reserved.
24  */
25 
26 /*
27  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
28  * Use is subject to license terms.
29  */
30 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
31 /* All Rights Reserved */
32 /*
33  * Portions of this source code were derived from Berkeley
34  * 4.3 BSD under license from the Regents of the University of
35  * California.
36  */
37 
38 /*
39  * xdr.h, External Data Representation Serialization Routines.
40  *
41  */
42 
43 #ifndef _RPC_XDR_H
44 #define	_RPC_XDR_H
45 
46 #include <sys/byteorder.h>	/* For all ntoh* and hton*() kind of macros */
47 #include <rpc/types.h>	/* For all ntoh* and hton*() kind of macros */
48 #if !defined(_KERNEL) && !defined(_FAKE_KERNEL)
49 #include <stdio.h> /* defines FILE *, used in ANSI C function prototypes */
50 #else	/* _KERNEL */
51 #include <sys/stream.h>
52 #endif	/* _KERNEL */
53 
54 #ifdef __cplusplus
55 extern "C" {
56 #endif
57 
58 /*
59  * XDR provides a conventional way for converting between C data
60  * types and an external bit-string representation.  Library supplied
61  * routines provide for the conversion on built-in C data types.  These
62  * routines and utility routines defined here are used to help implement
63  * a type encode/decode routine for each user-defined type.
64  *
65  * Each data type provides a single procedure which takes two arguments:
66  *
67  *	bool_t
68  *	xdrproc(xdrs, argresp)
69  *		XDR *xdrs;
70  *		<type> *argresp;
71  *
72  * xdrs is an instance of a XDR handle, to which or from which the data
73  * type is to be converted.  argresp is a pointer to the structure to be
74  * converted.  The XDR handle contains an operation field which indicates
75  * which of the operations (ENCODE, DECODE * or FREE) is to be performed.
76  *
77  * XDR_DECODE may allocate space if the pointer argresp is null.  This
78  * data can be freed with the XDR_FREE operation.
79  *
80  * We write only one procedure per data type to make it easy
81  * to keep the encode and decode procedures for a data type consistent.
82  * In many cases the same code performs all operations on a user defined type,
83  * because all the hard work is done in the component type routines.
84  * decode as a series of calls on the nested data types.
85  */
86 
87 /*
88  * Xdr operations.  XDR_ENCODE causes the type to be encoded into the
89  * stream.  XDR_DECODE causes the type to be extracted from the stream.
90  * XDR_FREE can be used to release the space allocated by an XDR_DECODE
91  * request.
92  */
93 enum xdr_op {
94 	XDR_ENCODE = 0,
95 	XDR_DECODE = 1,
96 	XDR_FREE = 2
97 };
98 
99 /*
100  * This is the number of bytes per unit of external data.
101  */
102 #define	BYTES_PER_XDR_UNIT	(4)
103 #define	RNDUP(x)  ((((x) + BYTES_PER_XDR_UNIT - 1) / BYTES_PER_XDR_UNIT) \
104 		    * BYTES_PER_XDR_UNIT)
105 
106 /*
107  * The XDR handle.
108  * Contains operation which is being applied to the stream,
109  * an operations vector for the paticular implementation (e.g. see xdr_mem.c),
110  * and two private fields for the use of the particular impelementation.
111  *
112  * PSARC 2003/523 Contract Private Interface
113  * XDR
114  * Changes must be reviewed by Solaris File Sharing
115  * Changes must be communicated to contract-2003-523@sun.com
116  */
117 typedef struct XDR {
118 	enum xdr_op	x_op;	/* operation; fast additional param */
119 	struct xdr_ops *x_ops;
120 	caddr_t 	x_public; /* users' data */
121 	caddr_t		x_private; /* pointer to private data */
122 	caddr_t 	x_base;	/* private used for position info */
123 	int		x_handy; /* extra private word */
124 } XDR;
125 
126 /*
127  * PSARC 2003/523 Contract Private Interface
128  * xdr_ops
129  * Changes must be reviewed by Solaris File Sharing
130  * Changes must be communicated to contract-2003-523@sun.com
131  */
132 struct xdr_ops {
133 #ifdef __STDC__
134 #if !defined(_KERNEL)
135 		bool_t	(*x_getlong)(struct XDR *, long *);
136 		/* get a long from underlying stream */
137 		bool_t	(*x_putlong)(struct XDR *, long *);
138 		/* put a long to " */
139 #endif /* KERNEL */
140 		bool_t	(*x_getbytes)(struct XDR *, caddr_t, int);
141 		/* get some bytes from " */
142 		bool_t	(*x_putbytes)(struct XDR *, caddr_t, int);
143 		/* put some bytes to " */
144 		uint_t	(*x_getpostn)(struct XDR *);
145 		/* returns bytes off from beginning */
146 		bool_t  (*x_setpostn)(struct XDR *, uint_t);
147 		/* lets you reposition the stream */
148 		rpc_inline_t *(*x_inline)(struct XDR *, int);
149 		/* buf quick ptr to buffered data */
150 		void	(*x_destroy)(struct XDR *);
151 		/* free privates of this xdr_stream */
152 		bool_t	(*x_control)(struct XDR *, int, void *);
153 #if defined(_LP64) || defined(_KERNEL)
154 		bool_t	(*x_getint32)(struct XDR *, int32_t *);
155 		/* get a int from underlying stream */
156 		bool_t	(*x_putint32)(struct XDR *, int32_t *);
157 		/* put an int to " */
158 #endif /* _LP64 || _KERNEL */
159 #else
160 #if !defined(_KERNEL)
161 		bool_t	(*x_getlong)();	/* get a long from underlying stream */
162 		bool_t	(*x_putlong)();	/* put a long to " */
163 #endif /* KERNEL */
164 		bool_t	(*x_getbytes)(); /* get some bytes from " */
165 		bool_t	(*x_putbytes)(); /* put some bytes to " */
166 		uint_t	(*x_getpostn)(); /* returns bytes off from beginning */
167 		bool_t  (*x_setpostn)(); /* lets you reposition the stream */
168 		rpc_inline_t *(*x_inline)();
169 				/* buf quick ptr to buffered data */
170 		void	(*x_destroy)();	/* free privates of this xdr_stream */
171 		bool_t	(*x_control)();
172 #if defined(_LP64) || defined(_KERNEL)
173 		bool_t	(*x_getint32)();
174 		bool_t	(*x_putint32)();
175 #endif /* _LP64 || defined(_KERNEL) */
176 #endif
177 };
178 
179 /*
180  * Operations defined on a XDR handle
181  *
182  * XDR		*xdrs;
183  * long		*longp;
184  * caddr_t	 addr;
185  * uint_t	 len;
186  * uint_t	 pos;
187  */
188 #if !defined(_KERNEL)
189 #define	XDR_GETLONG(xdrs, longp)			\
190 	(*(xdrs)->x_ops->x_getlong)(xdrs, longp)
191 #define	xdr_getlong(xdrs, longp)			\
192 	(*(xdrs)->x_ops->x_getlong)(xdrs, longp)
193 
194 #define	XDR_PUTLONG(xdrs, longp)			\
195 	(*(xdrs)->x_ops->x_putlong)(xdrs, longp)
196 #define	xdr_putlong(xdrs, longp)			\
197 	(*(xdrs)->x_ops->x_putlong)(xdrs, longp)
198 #endif /* KERNEL */
199 
200 
201 #if !defined(_LP64) && !defined(_KERNEL)
202 
203 /*
204  * For binary compatability on ILP32 we do not change the shape
205  * of the XDR structure and the GET/PUTINT32 functions just use
206  * the get/putlong vectors which operate on identically-sized
207  * units of data.
208  */
209 
210 #define	XDR_GETINT32(xdrs, int32p)			\
211 	(*(xdrs)->x_ops->x_getlong)(xdrs, (long *)int32p)
212 #define	xdr_getint32(xdrs, int32p)			\
213 	(*(xdrs)->x_ops->x_getlong)(xdrs, (long *)int32p)
214 
215 #define	XDR_PUTINT32(xdrs, int32p)			\
216 	(*(xdrs)->x_ops->x_putlong)(xdrs, (long *)int32p)
217 #define	xdr_putint32(xdrs, int32p)			\
218 	(*(xdrs)->x_ops->x_putlong)(xdrs, (long *)int32p)
219 
220 #else /* !_LP64 && !_KERNEL */
221 
222 #define	XDR_GETINT32(xdrs, int32p)			\
223 	(*(xdrs)->x_ops->x_getint32)(xdrs, int32p)
224 #define	xdr_getint32(xdrs, int32p)			\
225 	(*(xdrs)->x_ops->x_getint32)(xdrs, int32p)
226 
227 #define	XDR_PUTINT32(xdrs, int32p)			\
228 	(*(xdrs)->x_ops->x_putint32)(xdrs, int32p)
229 #define	xdr_putint32(xdrs, int32p)			\
230 	(*(xdrs)->x_ops->x_putint32)(xdrs, int32p)
231 
232 #endif /* !_LP64 && !_KERNEL */
233 
234 #define	XDR_GETBYTES(xdrs, addr, len)			\
235 	(*(xdrs)->x_ops->x_getbytes)(xdrs, addr, len)
236 #define	xdr_getbytes(xdrs, addr, len)			\
237 	(*(xdrs)->x_ops->x_getbytes)(xdrs, addr, len)
238 
239 #define	XDR_PUTBYTES(xdrs, addr, len)			\
240 	(*(xdrs)->x_ops->x_putbytes)(xdrs, addr, len)
241 #define	xdr_putbytes(xdrs, addr, len)			\
242 	(*(xdrs)->x_ops->x_putbytes)(xdrs, addr, len)
243 
244 #define	XDR_GETPOS(xdrs)				\
245 	(*(xdrs)->x_ops->x_getpostn)(xdrs)
246 #define	xdr_getpos(xdrs)				\
247 	(*(xdrs)->x_ops->x_getpostn)(xdrs)
248 
249 #define	XDR_SETPOS(xdrs, pos)				\
250 	(*(xdrs)->x_ops->x_setpostn)(xdrs, pos)
251 #define	xdr_setpos(xdrs, pos)				\
252 	(*(xdrs)->x_ops->x_setpostn)(xdrs, pos)
253 
254 #define	XDR_INLINE(xdrs, len)				\
255 	(*(xdrs)->x_ops->x_inline)(xdrs, len)
256 #define	xdr_inline(xdrs, len)				\
257 	(*(xdrs)->x_ops->x_inline)(xdrs, len)
258 
259 #define	XDR_DESTROY(xdrs)				\
260 	(*(xdrs)->x_ops->x_destroy)(xdrs)
261 #define	xdr_destroy(xdrs)				\
262 	(*(xdrs)->x_ops->x_destroy)(xdrs)
263 
264 #define	XDR_CONTROL(xdrs, req, op)			\
265 	(*(xdrs)->x_ops->x_control)(xdrs, req, op)
266 #define	xdr_control(xdrs, req, op)			\
267 	(*(xdrs)->x_ops->x_control)(xdrs, req, op)
268 
269 /*
270  * Support struct for discriminated unions.
271  * You create an array of xdrdiscrim structures, terminated with
272  * a entry with a null procedure pointer.  The xdr_union routine gets
273  * the discriminant value and then searches the array of structures
274  * for a matching value.  If a match is found the associated xdr routine
275  * is called to handle that part of the union.  If there is
276  * no match, then a default routine may be called.
277  * If there is no match and no default routine it is an error.
278  */
279 
280 
281 /*
282  * A xdrproc_t exists for each data type which is to be encoded or decoded.
283  *
284  * The second argument to the xdrproc_t is a pointer to an opaque pointer.
285  * The opaque pointer generally points to a structure of the data type
286  * to be decoded.  If this pointer is 0, then the type routines should
287  * allocate dynamic storage of the appropriate size and return it.
288  * bool_t	(*xdrproc_t)(XDR *, void *);
289  */
290 #ifdef __cplusplus
291 typedef bool_t (*xdrproc_t)(XDR *, void *);
292 #else
293 #ifdef __STDC__
294 typedef bool_t (*xdrproc_t)(); /* For Backward compatibility */
295 #else
296 typedef	bool_t (*xdrproc_t)();
297 #endif
298 #endif
299 
300 #define	NULL_xdrproc_t ((xdrproc_t)0)
301 
302 #if defined(_LP64) || defined(_I32LPx)
303 #define	xdr_rpcvers(xdrs, versp)	xdr_u_int(xdrs, versp)
304 #define	xdr_rpcprog(xdrs, progp)	xdr_u_int(xdrs, progp)
305 #define	xdr_rpcproc(xdrs, procp)	xdr_u_int(xdrs, procp)
306 #define	xdr_rpcprot(xdrs, protp)	xdr_u_int(xdrs, protp)
307 #define	xdr_rpcport(xdrs, portp)	xdr_u_int(xdrs, portp)
308 #else
309 #define	xdr_rpcvers(xdrs, versp)	xdr_u_long(xdrs, versp)
310 #define	xdr_rpcprog(xdrs, progp)	xdr_u_long(xdrs, progp)
311 #define	xdr_rpcproc(xdrs, procp)	xdr_u_long(xdrs, procp)
312 #define	xdr_rpcprot(xdrs, protp)	xdr_u_long(xdrs, protp)
313 #define	xdr_rpcport(xdrs, portp)	xdr_u_long(xdrs, portp)
314 #endif
315 
316 struct xdr_discrim {
317 	int	value;
318 	xdrproc_t proc;
319 };
320 
321 /*
322  * In-line routines for fast encode/decode of primitve data types.
323  * Caveat emptor: these use single memory cycles to get the
324  * data from the underlying buffer, and will fail to operate
325  * properly if the data is not aligned.  The standard way to use these
326  * is to say:
327  *	if ((buf = XDR_INLINE(xdrs, count)) == NULL)
328  *		return (FALSE);
329  *	<<< macro calls >>>
330  * where ``count'' is the number of bytes of data occupied
331  * by the primitive data types.
332  *
333  * N.B. and frozen for all time: each data type here uses 4 bytes
334  * of external representation.
335  */
336 
337 #define	IXDR_GET_INT32(buf)		((int32_t)ntohl((uint32_t)*(buf)++))
338 #define	IXDR_PUT_INT32(buf, v)		(*(buf)++ = (int32_t)htonl((uint32_t)v))
339 #define	IXDR_GET_U_INT32(buf)		((uint32_t)IXDR_GET_INT32(buf))
340 #define	IXDR_PUT_U_INT32(buf, v)	IXDR_PUT_INT32((buf), ((int32_t)(v)))
341 
342 #if !defined(_KERNEL) && !defined(_LP64)
343 
344 #define	IXDR_GET_LONG(buf)		((long)ntohl((ulong_t)*(buf)++))
345 #define	IXDR_PUT_LONG(buf, v)		(*(buf)++ = (long)htonl((ulong_t)v))
346 #define	IXDR_GET_U_LONG(buf)		((ulong_t)IXDR_GET_LONG(buf))
347 #define	IXDR_PUT_U_LONG(buf, v)		IXDR_PUT_LONG((buf), ((long)(v)))
348 
349 #define	IXDR_GET_BOOL(buf)		((bool_t)IXDR_GET_LONG(buf))
350 #define	IXDR_GET_ENUM(buf, t)		((t)IXDR_GET_LONG(buf))
351 #define	IXDR_GET_SHORT(buf)		((short)IXDR_GET_LONG(buf))
352 #define	IXDR_GET_U_SHORT(buf)		((ushort_t)IXDR_GET_LONG(buf))
353 
354 #define	IXDR_PUT_BOOL(buf, v)		IXDR_PUT_LONG((buf), ((long)(v)))
355 #define	IXDR_PUT_ENUM(buf, v)		IXDR_PUT_LONG((buf), ((long)(v)))
356 #define	IXDR_PUT_SHORT(buf, v)		IXDR_PUT_LONG((buf), ((long)(v)))
357 #define	IXDR_PUT_U_SHORT(buf, v)	IXDR_PUT_LONG((buf), ((long)(v)))
358 
359 #else
360 
361 #define	IXDR_GET_BOOL(buf)		((bool_t)IXDR_GET_INT32(buf))
362 #define	IXDR_GET_ENUM(buf, t)		((t)IXDR_GET_INT32(buf))
363 #define	IXDR_GET_SHORT(buf)		((short)IXDR_GET_INT32(buf))
364 #define	IXDR_GET_U_SHORT(buf)		((ushort_t)IXDR_GET_INT32(buf))
365 
366 #define	IXDR_PUT_BOOL(buf, v)		IXDR_PUT_INT32((buf), ((int)(v)))
367 #define	IXDR_PUT_ENUM(buf, v)		IXDR_PUT_INT32((buf), ((int)(v)))
368 #define	IXDR_PUT_SHORT(buf, v)		IXDR_PUT_INT32((buf), ((int)(v)))
369 #define	IXDR_PUT_U_SHORT(buf, v)	IXDR_PUT_INT32((buf), ((int)(v)))
370 
371 #endif
372 
373 #ifndef _LITTLE_ENDIAN
374 #define	IXDR_GET_HYPER(buf, v)	{ \
375 			*((int32_t *)(&v)) = ntohl(*(uint32_t *)buf++); \
376 			*((int32_t *)(((char *)&v) + BYTES_PER_XDR_UNIT)) \
377 			= ntohl(*(uint32_t *)buf++); \
378 			}
379 #define	IXDR_PUT_HYPER(buf, v)	{ \
380 			*(buf)++ = (int32_t)htonl(*(uint32_t *) \
381 				((char *)&v)); \
382 			*(buf)++ = \
383 				(int32_t)htonl(*(uint32_t *)(((char *)&v) \
384 				+ BYTES_PER_XDR_UNIT)); \
385 			}
386 #else
387 
388 #define	IXDR_GET_HYPER(buf, v)	{ \
389 			*((int32_t *)(((char *)&v) + \
390 				BYTES_PER_XDR_UNIT)) \
391 				= ntohl(*(uint32_t *)buf++); \
392 			*((int32_t *)(&v)) = \
393 				ntohl(*(uint32_t *)buf++); \
394 			}
395 
396 #define	IXDR_PUT_HYPER(buf, v)	{ \
397 			*(buf)++ = \
398 				(int32_t)htonl(*(uint32_t *)(((char *)&v) + \
399 				BYTES_PER_XDR_UNIT)); \
400 			*(buf)++ = \
401 				(int32_t)htonl(*(uint32_t *)((char *)&v)); \
402 			}
403 #endif
404 #define	IXDR_GET_U_HYPER(buf, v)	IXDR_GET_HYPER(buf, v)
405 #define	IXDR_PUT_U_HYPER(buf, v)	IXDR_PUT_HYPER(buf, v)
406 
407 
408 /*
409  * These are the "generic" xdr routines.
410  */
411 #ifdef __STDC__
412 extern bool_t	xdr_void(void);
413 extern bool_t	xdr_int(XDR *, int *);
414 extern bool_t	xdr_u_int(XDR *, uint_t *);
415 extern bool_t	xdr_long(XDR *, long *);
416 extern bool_t	xdr_u_long(XDR *, ulong_t *);
417 extern bool_t	xdr_short(XDR *, short *);
418 extern bool_t	xdr_u_short(XDR *, ushort_t *);
419 extern bool_t	xdr_bool(XDR *, bool_t *);
420 extern bool_t	xdr_enum(XDR *, enum_t *);
421 extern bool_t	xdr_array(XDR *, caddr_t *, uint_t *, const uint_t,
422 		    const uint_t, const xdrproc_t);
423 extern bool_t	xdr_bytes(XDR *, char **, uint_t *, const uint_t);
424 extern bool_t	xdr_opaque(XDR *, caddr_t, const uint_t);
425 extern bool_t	xdr_string(XDR *, char **, const uint_t);
426 extern bool_t	xdr_union(XDR *, enum_t *, char *,
427 		    const struct xdr_discrim *, const xdrproc_t);
428 extern bool_t	xdr_vector(XDR *, char *, const uint_t, const uint_t,
429     const xdrproc_t);
430 extern unsigned int  xdr_sizeof(xdrproc_t, void *);
431 
432 extern bool_t   xdr_hyper(XDR *, longlong_t *);
433 extern bool_t   xdr_longlong_t(XDR *, longlong_t *);
434 extern bool_t   xdr_u_hyper(XDR *, u_longlong_t *);
435 extern bool_t   xdr_u_longlong_t(XDR *, u_longlong_t *);
436 
437 extern bool_t	xdr_char(XDR *, char *);
438 extern bool_t	xdr_u_char(XDR *, uchar_t *);
439 extern bool_t	xdr_wrapstring(XDR *, char **);
440 extern bool_t	xdr_reference(XDR *, caddr_t *, uint_t, const xdrproc_t);
441 extern bool_t	xdr_pointer(XDR *, char **, uint_t, const xdrproc_t);
442 extern void	xdr_free(xdrproc_t, char *);
443 extern bool_t	xdr_time_t(XDR *, time_t *);
444 
445 extern bool_t	xdr_int8_t(XDR *, int8_t *);
446 extern bool_t	xdr_uint8_t(XDR *, uint8_t *);
447 extern bool_t	xdr_int16_t(XDR *, int16_t *);
448 extern bool_t	xdr_uint16_t(XDR *, uint16_t *);
449 extern bool_t	xdr_int32_t(XDR *, int32_t *);
450 extern bool_t	xdr_uint32_t(XDR *, uint32_t *);
451 #if defined(_INT64_TYPE)
452 extern bool_t	xdr_int64_t(XDR *, int64_t *);
453 extern bool_t	xdr_uint64_t(XDR *, uint64_t *);
454 #endif
455 
456 #ifndef _KERNEL
457 extern bool_t	xdr_float(XDR *, float *);
458 extern bool_t	xdr_double(XDR *, double *);
459 extern bool_t	xdr_quadruple(XDR *, long double *);
460 #endif /* !_KERNEL */
461 #else
462 extern bool_t	xdr_void();
463 extern bool_t	xdr_int();
464 extern bool_t	xdr_u_int();
465 extern bool_t	xdr_long();
466 extern bool_t	xdr_u_long();
467 extern bool_t	xdr_short();
468 extern bool_t	xdr_u_short();
469 extern bool_t	xdr_bool();
470 extern bool_t	xdr_enum();
471 extern bool_t	xdr_array();
472 extern bool_t	xdr_bytes();
473 extern bool_t	xdr_opaque();
474 extern bool_t	xdr_string();
475 extern bool_t	xdr_union();
476 extern bool_t	xdr_vector();
477 
478 extern bool_t   xdr_hyper();
479 extern bool_t   xdr_longlong_t();
480 extern bool_t   xdr_u_hyper();
481 extern bool_t   xdr_u_longlong_t();
482 extern bool_t	xdr_char();
483 extern bool_t	xdr_u_char();
484 extern bool_t	xdr_reference();
485 extern bool_t	xdr_pointer();
486 extern void	xdr_free();
487 extern bool_t	xdr_wrapstring();
488 extern bool_t	xdr_time_t();
489 
490 extern bool_t	xdr_int8_t();
491 extern bool_t	xdr_uint8_t();
492 extern bool_t	xdr_int16_t();
493 extern bool_t	xdr_uint16_t();
494 extern bool_t	xdr_int32_t();
495 extern bool_t	xdr_uint32_t();
496 #if defined(_INT64_TYPE)
497 extern bool_t	xdr_int64_t();
498 extern bool_t	xdr_uint64_t();
499 #endif
500 
501 #ifndef _KERNEL
502 extern bool_t	xdr_float();
503 extern bool_t	xdr_double();
504 extern bool_t   xdr_quadruple();
505 #endif /* !_KERNEL */
506 #endif
507 
508 /*
509  * Common opaque bytes objects used by many rpc protocols;
510  * declared here due to commonality.
511  */
512 #define	MAX_NETOBJ_SZ 1024
513 struct netobj {
514 	uint_t	n_len;
515 	char	*n_bytes;
516 };
517 typedef struct netobj netobj;
518 
519 #ifdef __STDC__
520 extern bool_t   xdr_netobj(XDR *, netobj *);
521 #else
522 extern bool_t   xdr_netobj();
523 #endif
524 
525 /*
526  * These are XDR control operators
527  */
528 
529 #define	XDR_GET_BYTES_AVAIL 1
530 
531 struct xdr_bytesrec {
532 	bool_t xc_is_last_record;
533 	size_t xc_num_avail;
534 };
535 
536 typedef struct xdr_bytesrec xdr_bytesrec;
537 
538 /*
539  * These are the request arguments to XDR_CONTROL.
540  *
541  * XDR_PEEK - returns the contents of the next XDR unit on the XDR stream.
542  * XDR_SKIPBYTES - skips the next N bytes in the XDR stream.
543  * XDR_RDMAGET - for xdr implementation over RDMA, gets private flags from
544  *		 the XDR stream being moved over RDMA
545  * XDR_RDMANOCHUNK - for xdr implementaion over RDMA, sets private flags in
546  *                   the XDR stream moving over RDMA.
547  */
548 #ifdef _KERNEL
549 #define	XDR_PEEK		2
550 #define	XDR_SKIPBYTES		3
551 #define	XDR_RDMA_GET_FLAGS	4
552 #define	XDR_RDMA_SET_FLAGS	5
553 #define	XDR_RDMA_ADD_CHUNK	6
554 #define	XDR_RDMA_GET_CHUNK_LEN	7
555 #define	XDR_RDMA_SET_WLIST	8
556 #define	XDR_RDMA_GET_WLIST	9
557 #define	XDR_RDMA_GET_WCINFO	10
558 #define	XDR_RDMA_GET_RLIST	11
559 #endif
560 
561 /*
562  * These are the public routines for the various implementations of
563  * xdr streams.
564  */
565 #if !defined(_KERNEL) && !defined(_FAKE_KERNEL)
566 #ifdef __STDC__
567 extern void   xdrmem_create(XDR *, const caddr_t, const uint_t, const enum
568 xdr_op);
569 	/* XDR using memory buffers */
570 extern void   xdrstdio_create(XDR *, FILE *, const enum xdr_op);
571 /* XDR using stdio library */
572 extern void   xdrrec_create(XDR *, const uint_t, const uint_t, const caddr_t,
573 int (*) (void *, caddr_t, int), int (*) (void *, caddr_t, int));
574 /* XDR pseudo records for tcp */
575 extern bool_t xdrrec_endofrecord(XDR *, bool_t);
576 /* make end of xdr record */
577 extern bool_t xdrrec_skiprecord(XDR *);
578 /* move to beginning of next record */
579 extern bool_t xdrrec_eof(XDR *);
580 extern uint_t xdrrec_readbytes(XDR *, caddr_t, uint_t);
581 /* true if no more input */
582 #else
583 extern void   xdrmem_create();
584 extern void   xdrstdio_create();
585 extern void   xdrrec_create();
586 extern bool_t xdrrec_endofrecord();
587 extern bool_t xdrrec_skiprecord();
588 extern bool_t xdrrec_eof();
589 extern uint_t xdrrec_readbytes();
590 #endif
591 #else
592 
593 #define	DLEN(mp) (mp->b_cont ? msgdsize(mp) : (mp->b_wptr - mp->b_rptr))
594 
595 extern void	xdrmem_create(XDR *, caddr_t, uint_t, enum xdr_op);
596 extern void	xdrmblk_init(XDR *, mblk_t *, enum xdr_op, int);
597 extern bool_t	xdrmblk_getmblk(XDR *, mblk_t **, uint_t *);
598 extern bool_t	xdrmblk_putmblk(XDR *, mblk_t *, uint_t);
599 extern bool_t	xdrmblk_putmblk_raw(XDR *, mblk_t *);
600 extern struct xdr_ops xdrmblk_ops;
601 extern struct xdr_ops xdrrdmablk_ops;
602 extern struct xdr_ops xdrrdma_ops;
603 
604 struct rpc_msg;
605 extern bool_t	xdr_callmsg(XDR *, struct rpc_msg *);
606 extern bool_t	xdr_replymsg_body(XDR *, struct rpc_msg *);
607 extern bool_t	xdr_replymsg_hdr(XDR *, struct rpc_msg *);
608 
609 #endif /* !_KERNEL */
610 
611 #ifdef __cplusplus
612 }
613 #endif
614 
615 #endif	/* !_RPC_XDR_H */
616