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28f540f4 RM |
1 | /* @(#)xdr.h 2.2 88/07/29 4.0 RPCSRC */ |
2 | /* | |
3 | * Sun RPC is a product of Sun Microsystems, Inc. and is provided for | |
4 | * unrestricted use provided that this legend is included on all tape | |
5 | * media and as a part of the software program in whole or part. Users | |
6 | * may copy or modify Sun RPC without charge, but are not authorized | |
7 | * to license or distribute it to anyone else except as part of a product or | |
8 | * program developed by the user. | |
fc933e28 | 9 | * |
28f540f4 RM |
10 | * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE |
11 | * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR | |
12 | * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. | |
fc933e28 | 13 | * |
28f540f4 RM |
14 | * Sun RPC is provided with no support and without any obligation on the |
15 | * part of Sun Microsystems, Inc. to assist in its use, correction, | |
16 | * modification or enhancement. | |
fc933e28 | 17 | * |
28f540f4 RM |
18 | * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE |
19 | * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC | |
20 | * OR ANY PART THEREOF. | |
fc933e28 | 21 | * |
28f540f4 RM |
22 | * In no event will Sun Microsystems, Inc. be liable for any lost revenue |
23 | * or profits or other special, indirect and consequential damages, even if | |
24 | * Sun has been advised of the possibility of such damages. | |
fc933e28 | 25 | * |
28f540f4 RM |
26 | * Sun Microsystems, Inc. |
27 | * 2550 Garcia Avenue | |
28 | * Mountain View, California 94043 | |
29 | */ | |
30 | /* @(#)xdr.h 1.19 87/04/22 SMI */ | |
31 | ||
32 | /* | |
33 | * xdr.h, External Data Representation Serialization Routines. | |
34 | * | |
35 | * Copyright (C) 1984, Sun Microsystems, Inc. | |
36 | */ | |
37 | ||
38 | #ifndef __XDR_HEADER__ | |
fc933e28 | 39 | |
28f540f4 | 40 | #define __XDR_HEADER__ |
fc933e28 | 41 | #include <features.h> |
1f205a47 UD |
42 | #include <sys/types.h> |
43 | #include <rpc/types.h> | |
fc933e28 RM |
44 | |
45 | /* We need FILE. */ | |
46 | #include <stdio.h> | |
47 | ||
48 | __BEGIN_DECLS | |
28f540f4 RM |
49 | |
50 | /* | |
51 | * XDR provides a conventional way for converting between C data | |
52 | * types and an external bit-string representation. Library supplied | |
53 | * routines provide for the conversion on built-in C data types. These | |
54 | * routines and utility routines defined here are used to help implement | |
55 | * a type encode/decode routine for each user-defined type. | |
56 | * | |
57 | * Each data type provides a single procedure which takes two arguments: | |
58 | * | |
e7fd8a39 UD |
59 | * bool_t |
60 | * xdrproc(xdrs, argresp) | |
61 | * XDR *xdrs; | |
62 | * <type> *argresp; | |
28f540f4 RM |
63 | * |
64 | * xdrs is an instance of a XDR handle, to which or from which the data | |
65 | * type is to be converted. argresp is a pointer to the structure to be | |
66 | * converted. The XDR handle contains an operation field which indicates | |
67 | * which of the operations (ENCODE, DECODE * or FREE) is to be performed. | |
68 | * | |
69 | * XDR_DECODE may allocate space if the pointer argresp is null. This | |
70 | * data can be freed with the XDR_FREE operation. | |
71 | * | |
72 | * We write only one procedure per data type to make it easy | |
73 | * to keep the encode and decode procedures for a data type consistent. | |
74 | * In many cases the same code performs all operations on a user defined type, | |
75 | * because all the hard work is done in the component type routines. | |
76 | * decode as a series of calls on the nested data types. | |
77 | */ | |
78 | ||
79 | /* | |
80 | * Xdr operations. XDR_ENCODE causes the type to be encoded into the | |
81 | * stream. XDR_DECODE causes the type to be extracted from the stream. | |
82 | * XDR_FREE can be used to release the space allocated by an XDR_DECODE | |
83 | * request. | |
84 | */ | |
e7fd8a39 UD |
85 | enum xdr_op |
86 | { | |
87 | XDR_ENCODE = 0, | |
88 | XDR_DECODE = 1, | |
89 | XDR_FREE = 2 | |
90 | }; | |
28f540f4 RM |
91 | |
92 | /* | |
93 | * This is the number of bytes per unit of external data. | |
94 | */ | |
95 | #define BYTES_PER_XDR_UNIT (4) | |
1f205a47 UD |
96 | /* |
97 | * This only works if the above is a power of 2. But it's defined to be | |
98 | * 4 by the appropriate RFCs. So it will work. And it's normally quicker | |
99 | * than the old routine. | |
100 | */ | |
101 | #if 1 | |
102 | #define RNDUP(x) (((x) + BYTES_PER_XDR_UNIT - 1) & ~(BYTES_PER_XDR_UNIT - 1)) | |
103 | #else /* this is the old routine */ | |
28f540f4 RM |
104 | #define RNDUP(x) ((((x) + BYTES_PER_XDR_UNIT - 1) / BYTES_PER_XDR_UNIT) \ |
105 | * BYTES_PER_XDR_UNIT) | |
1f205a47 | 106 | #endif |
28f540f4 | 107 | |
28f540f4 RM |
108 | /* |
109 | * The XDR handle. | |
110 | * Contains operation which is being applied to the stream, | |
6d52618b UD |
111 | * an operations vector for the particular implementation (e.g. see xdr_mem.c), |
112 | * and two private fields for the use of the particular implementation. | |
28f540f4 | 113 | */ |
e7fd8a39 UD |
114 | typedef struct XDR XDR; |
115 | struct XDR | |
116 | { | |
117 | enum xdr_op x_op; /* operation; fast additional param */ | |
118 | const struct xdr_ops | |
119 | { | |
120 | bool_t (*x_getlong) __P ((XDR * __xdrs, long *__lp)); | |
121 | /* get a long from underlying stream */ | |
1f205a47 | 122 | bool_t (*x_putlong) __P ((XDR * __xdrs, __const long *__lp)); |
e7fd8a39 UD |
123 | /* put a long to " */ |
124 | bool_t (*x_getbytes) __P ((XDR * __xdrs, caddr_t __addr, u_int __len)); | |
125 | /* get some bytes from " */ | |
126 | bool_t (*x_putbytes) __P ((XDR * __xdrs, __const caddr_t __addr, | |
127 | u_int __len)); | |
128 | /* put some bytes to " */ | |
129 | u_int (*x_getpostn) __P ((XDR * __xdrs)); | |
130 | /* returns bytes off from beginning */ | |
131 | bool_t (*x_setpostn) __P ((XDR * __xdrs, u_int pos)); | |
132 | /* lets you reposition the stream */ | |
133 | long *(*x_inline) __P ((XDR * __xdrs, int len)); | |
134 | /* buf quick ptr to buffered data */ | |
135 | void (*x_destroy) __P ((XDR * __xdrs)); | |
136 | /* free privates of this xdr_stream */ | |
137 | } | |
138 | *x_ops; | |
139 | caddr_t x_public; /* users' data */ | |
140 | caddr_t x_private; /* pointer to private data */ | |
141 | caddr_t x_base; /* private used for position info */ | |
142 | int x_handy; /* extra private word */ | |
143 | }; | |
28f540f4 | 144 | |
23396375 UD |
145 | /* |
146 | * A xdrproc_t exists for each data type which is to be encoded or decoded. | |
147 | * | |
148 | * The second argument to the xdrproc_t is a pointer to an opaque pointer. | |
149 | * The opaque pointer generally points to a structure of the data type | |
150 | * to be decoded. If this pointer is 0, then the type routines should | |
151 | * allocate dynamic storage of the appropriate size and return it. | |
e7fd8a39 | 152 | * bool_t (*xdrproc_t)(XDR *, caddr_t *); |
23396375 | 153 | */ |
e7fd8a39 UD |
154 | typedef |
155 | bool_t (*xdrproc_t) __P ((XDR *, void *,...)); | |
23396375 | 156 | |
28f540f4 RM |
157 | /* |
158 | * Operations defined on a XDR handle | |
159 | * | |
e7fd8a39 UD |
160 | * XDR *xdrs; |
161 | * long *longp; | |
162 | * caddr_t addr; | |
163 | * u_int len; | |
164 | * u_int pos; | |
28f540f4 RM |
165 | */ |
166 | #define XDR_GETLONG(xdrs, longp) \ | |
167 | (*(xdrs)->x_ops->x_getlong)(xdrs, longp) | |
168 | #define xdr_getlong(xdrs, longp) \ | |
169 | (*(xdrs)->x_ops->x_getlong)(xdrs, longp) | |
170 | ||
171 | #define XDR_PUTLONG(xdrs, longp) \ | |
172 | (*(xdrs)->x_ops->x_putlong)(xdrs, longp) | |
173 | #define xdr_putlong(xdrs, longp) \ | |
174 | (*(xdrs)->x_ops->x_putlong)(xdrs, longp) | |
175 | ||
176 | #define XDR_GETBYTES(xdrs, addr, len) \ | |
177 | (*(xdrs)->x_ops->x_getbytes)(xdrs, addr, len) | |
178 | #define xdr_getbytes(xdrs, addr, len) \ | |
179 | (*(xdrs)->x_ops->x_getbytes)(xdrs, addr, len) | |
180 | ||
181 | #define XDR_PUTBYTES(xdrs, addr, len) \ | |
182 | (*(xdrs)->x_ops->x_putbytes)(xdrs, addr, len) | |
183 | #define xdr_putbytes(xdrs, addr, len) \ | |
184 | (*(xdrs)->x_ops->x_putbytes)(xdrs, addr, len) | |
185 | ||
186 | #define XDR_GETPOS(xdrs) \ | |
187 | (*(xdrs)->x_ops->x_getpostn)(xdrs) | |
188 | #define xdr_getpos(xdrs) \ | |
189 | (*(xdrs)->x_ops->x_getpostn)(xdrs) | |
190 | ||
191 | #define XDR_SETPOS(xdrs, pos) \ | |
192 | (*(xdrs)->x_ops->x_setpostn)(xdrs, pos) | |
193 | #define xdr_setpos(xdrs, pos) \ | |
194 | (*(xdrs)->x_ops->x_setpostn)(xdrs, pos) | |
195 | ||
196 | #define XDR_INLINE(xdrs, len) \ | |
197 | (*(xdrs)->x_ops->x_inline)(xdrs, len) | |
198 | #define xdr_inline(xdrs, len) \ | |
199 | (*(xdrs)->x_ops->x_inline)(xdrs, len) | |
200 | ||
201 | #define XDR_DESTROY(xdrs) \ | |
202 | if ((xdrs)->x_ops->x_destroy) \ | |
203 | (*(xdrs)->x_ops->x_destroy)(xdrs) | |
204 | #define xdr_destroy(xdrs) \ | |
205 | if ((xdrs)->x_ops->x_destroy) \ | |
206 | (*(xdrs)->x_ops->x_destroy)(xdrs) | |
207 | ||
208 | /* | |
209 | * Support struct for discriminated unions. | |
210 | * You create an array of xdrdiscrim structures, terminated with | |
211 | * a entry with a null procedure pointer. The xdr_union routine gets | |
212 | * the discriminant value and then searches the array of structures | |
213 | * for a matching value. If a match is found the associated xdr routine | |
214 | * is called to handle that part of the union. If there is | |
215 | * no match, then a default routine may be called. | |
216 | * If there is no match and no default routine it is an error. | |
217 | */ | |
218 | #define NULL_xdrproc_t ((xdrproc_t)0) | |
e7fd8a39 UD |
219 | struct xdr_discrim |
220 | { | |
221 | int value; | |
222 | xdrproc_t proc; | |
28f540f4 RM |
223 | }; |
224 | ||
225 | /* | |
6d52618b | 226 | * Inline routines for fast encode/decode of primitive data types. |
28f540f4 RM |
227 | * Caveat emptor: these use single memory cycles to get the |
228 | * data from the underlying buffer, and will fail to operate | |
229 | * properly if the data is not aligned. The standard way to use these | |
230 | * is to say: | |
e7fd8a39 UD |
231 | * if ((buf = XDR_INLINE(xdrs, count)) == NULL) |
232 | * return (FALSE); | |
233 | * <<< macro calls >>> | |
28f540f4 RM |
234 | * where ``count'' is the number of bytes of data occupied |
235 | * by the primitive data types. | |
236 | * | |
237 | * N.B. and frozen for all time: each data type here uses 4 bytes | |
238 | * of external representation. | |
239 | */ | |
b20e47cb RM |
240 | #define IXDR_GET_LONG(buf) ((long)ntohl((u_long)*((u_int32_t*)buf)++)) |
241 | #define IXDR_PUT_LONG(buf, v) (*((u_int32_t*)(buf))++ = (long)htonl((u_long)v)) | |
28f540f4 RM |
242 | |
243 | #define IXDR_GET_BOOL(buf) ((bool_t)IXDR_GET_LONG(buf)) | |
244 | #define IXDR_GET_ENUM(buf, t) ((t)IXDR_GET_LONG(buf)) | |
245 | #define IXDR_GET_U_LONG(buf) ((u_long)IXDR_GET_LONG(buf)) | |
246 | #define IXDR_GET_SHORT(buf) ((short)IXDR_GET_LONG(buf)) | |
247 | #define IXDR_GET_U_SHORT(buf) ((u_short)IXDR_GET_LONG(buf)) | |
248 | ||
249 | #define IXDR_PUT_BOOL(buf, v) IXDR_PUT_LONG((buf), ((long)(v))) | |
250 | #define IXDR_PUT_ENUM(buf, v) IXDR_PUT_LONG((buf), ((long)(v))) | |
251 | #define IXDR_PUT_U_LONG(buf, v) IXDR_PUT_LONG((buf), ((long)(v))) | |
252 | #define IXDR_PUT_SHORT(buf, v) IXDR_PUT_LONG((buf), ((long)(v))) | |
253 | #define IXDR_PUT_U_SHORT(buf, v) IXDR_PUT_LONG((buf), ((long)(v))) | |
254 | ||
255 | /* | |
256 | * These are the "generic" xdr routines. | |
1f205a47 UD |
257 | * None of these can have const applied because it's not possible to |
258 | * know whether the call is a read or a write to the passed parameter | |
259 | * also, the XDR structure is always updated by some of these calls. | |
28f540f4 | 260 | */ |
e7fd8a39 UD |
261 | extern bool_t xdr_void __P ((void)); |
262 | extern bool_t xdr_int __P ((XDR * __xdrs, int *__ip)); | |
263 | extern bool_t xdr_u_int __P ((XDR * __xdrs, u_int * __up)); | |
264 | extern bool_t xdr_long __P ((XDR * __xdrs, long *__lp)); | |
265 | extern bool_t xdr_u_long __P ((XDR * __xdrs, u_long * __ulp)); | |
266 | extern bool_t xdr_short __P ((XDR * __xdrs, short *__sp)); | |
267 | extern bool_t xdr_u_short __P ((XDR * __xdrs, u_short * __usp)); | |
268 | extern bool_t xdr_bool __P ((XDR * __xdrs, bool_t * __bp)); | |
269 | extern bool_t xdr_enum __P ((XDR * __xdrs, enum_t * __ep)); | |
270 | extern bool_t xdr_array __P ((XDR * _xdrs, caddr_t * __addrp, u_int * __sizep, | |
271 | u_int __maxsize, u_int __elsize, | |
272 | xdrproc_t __elproc)); | |
273 | extern bool_t xdr_bytes __P ((XDR * __xdrs, char **__cpp, u_int * __sizep, | |
274 | u_int __maxsize)); | |
275 | extern bool_t xdr_opaque __P ((XDR * __xdrs, caddr_t __cp, u_int __cnt)); | |
276 | extern bool_t xdr_string __P ((XDR * __xdrs, char **__cpp, u_int __maxsize)); | |
277 | extern bool_t xdr_union __P ((XDR * __xdrs, enum_t * __dscmp, char *__unp, | |
278 | __const struct xdr_discrim * __choices, | |
279 | xdrproc_t dfault)); | |
280 | extern bool_t xdr_char __P ((XDR * __xdrs, char *__cp)); | |
281 | extern bool_t xdr_u_char __P ((XDR * __xdrs, u_char * __cp)); | |
282 | extern bool_t xdr_vector __P ((XDR * __xdrs, char *__basep, u_int __nelem, | |
283 | u_int __elemsize, xdrproc_t __xdr_elem)); | |
284 | extern bool_t xdr_float __P ((XDR * __xdrs, float *__fp)); | |
285 | extern bool_t xdr_double __P ((XDR * __xdrs, double *__dp)); | |
286 | extern bool_t xdr_reference __P ((XDR * __xdrs, caddr_t * __pp, u_int __size, | |
287 | xdrproc_t __proc)); | |
288 | extern bool_t xdr_pointer __P ((XDR * __xdrs, char **__objpp, | |
289 | u_int __obj_size, xdrproc_t __xdr_obj)); | |
290 | extern bool_t xdr_wrapstring __P ((XDR * __xdrs, char **__cpp)); | |
28f540f4 RM |
291 | |
292 | /* | |
293 | * Common opaque bytes objects used by many rpc protocols; | |
294 | * declared here due to commonality. | |
295 | */ | |
fc933e28 | 296 | #define MAX_NETOBJ_SZ 1024 |
e7fd8a39 UD |
297 | struct netobj |
298 | { | |
299 | u_int n_len; | |
300 | char *n_bytes; | |
28f540f4 RM |
301 | }; |
302 | typedef struct netobj netobj; | |
e7fd8a39 | 303 | extern bool_t xdr_netobj __P ((XDR * __xdrs, struct netobj * __np)); |
28f540f4 RM |
304 | |
305 | /* | |
306 | * These are the public routines for the various implementations of | |
307 | * xdr streams. | |
308 | */ | |
fc933e28 RM |
309 | |
310 | /* XDR using memory buffers */ | |
1f205a47 UD |
311 | extern void xdrmem_create __P ((XDR * __xdrs, __const caddr_t __addr, |
312 | u_int __size, enum xdr_op __op)); | |
fc933e28 RM |
313 | |
314 | /* XDR using stdio library */ | |
e7fd8a39 UD |
315 | extern void xdrstdio_create __P ((XDR * __xdrs, FILE * __file, |
316 | enum xdr_op __op)); | |
fc933e28 RM |
317 | |
318 | /* XDR pseudo records for tcp */ | |
e7fd8a39 UD |
319 | extern void xdrrec_create __P ((XDR * __xdrs, u_int __sendsize, |
320 | u_int __recvsize, caddr_t __tcp_handle, | |
321 | int (*__readit) (char *, char *, int), | |
322 | int (*__writeit) (char *, char *, int))); | |
fc933e28 RM |
323 | |
324 | /* make end of xdr record */ | |
e7fd8a39 | 325 | extern bool_t xdrrec_endofrecord __P ((XDR * __xdrs, bool_t __sendnow)); |
fc933e28 RM |
326 | |
327 | /* move to beginning of next record */ | |
e7fd8a39 | 328 | extern bool_t xdrrec_skiprecord __P ((XDR * __xdrs)); |
fc933e28 RM |
329 | |
330 | /* true if no more input */ | |
e7fd8a39 | 331 | extern bool_t xdrrec_eof __P ((XDR * __xdrs)); |
fc933e28 | 332 | |
10dc2a90 UD |
333 | /* free memory buffers for xdr */ |
334 | extern void xdr_free __P ((xdrproc_t __proc, char *__objp)); | |
335 | ||
fc933e28 RM |
336 | __END_DECLS |
337 | ||
338 | #endif /* !__XDR_HEADER__ */ |