1 | /* |
---|
2 | * Sun RPC is a product of Sun Microsystems, Inc. and is provided for |
---|
3 | * unrestricted use provided that this legend is included on all tape |
---|
4 | * media and as a part of the software program in whole or part. Users |
---|
5 | * may copy or modify Sun RPC without charge, but are not authorized |
---|
6 | * to license or distribute it to anyone else except as part of a product or |
---|
7 | * program developed by the user. |
---|
8 | * |
---|
9 | * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE |
---|
10 | * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR |
---|
11 | * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. |
---|
12 | * |
---|
13 | * Sun RPC is provided with no support and without any obligation on the |
---|
14 | * part of Sun Microsystems, Inc. to assist in its use, correction, |
---|
15 | * modification or enhancement. |
---|
16 | * |
---|
17 | * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE |
---|
18 | * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC |
---|
19 | * OR ANY PART THEREOF. |
---|
20 | * |
---|
21 | * In no event will Sun Microsystems, Inc. be liable for any lost revenue |
---|
22 | * or profits or other special, indirect and consequential damages, even if |
---|
23 | * Sun has been advised of the possibility of such damages. |
---|
24 | * |
---|
25 | * Sun Microsystems, Inc. |
---|
26 | * 2550 Garcia Avenue |
---|
27 | * Mountain View, California 94043 |
---|
28 | */ |
---|
29 | |
---|
30 | #if defined(LIBC_SCCS) && !defined(lint) |
---|
31 | /*static char *sccsid = "from: @(#)xdr.c 1.35 87/08/12";*/ |
---|
32 | /*static char *sccsid = "from: @(#)xdr.c 2.1 88/07/29 4.0 RPCSRC";*/ |
---|
33 | static char *rcsid = "$FreeBSD: src/lib/libc/xdr/xdr.c,v 1.9 1999/08/28 00:02:55 peter Exp $"; |
---|
34 | #endif |
---|
35 | |
---|
36 | /* |
---|
37 | * xdr.c, Generic XDR routines implementation. |
---|
38 | * |
---|
39 | * Copyright (C) 1986, Sun Microsystems, Inc. |
---|
40 | * |
---|
41 | * These are the "generic" xdr routines used to serialize and de-serialize |
---|
42 | * most common data items. See xdr.h for more info on the interface to |
---|
43 | * xdr. |
---|
44 | */ |
---|
45 | |
---|
46 | #include <stdio.h> |
---|
47 | #include <stdlib.h> |
---|
48 | #include <string.h> |
---|
49 | |
---|
50 | #include <rpc/types.h> |
---|
51 | #include <rpc/xdr.h> |
---|
52 | |
---|
53 | /* |
---|
54 | * constants specific to the xdr "protocol" |
---|
55 | */ |
---|
56 | #define XDR_FALSE ((long) 0) |
---|
57 | #define XDR_TRUE ((long) 1) |
---|
58 | #define LASTUNSIGNED ((u_int) 0-1) |
---|
59 | |
---|
60 | /* |
---|
61 | * for unit alignment |
---|
62 | */ |
---|
63 | static char xdr_zero[BYTES_PER_XDR_UNIT] = { 0, 0, 0, 0 }; |
---|
64 | |
---|
65 | /* |
---|
66 | * Free a data structure using XDR |
---|
67 | * Not a filter, but a convenient utility nonetheless |
---|
68 | */ |
---|
69 | void |
---|
70 | xdr_free(proc, objp) |
---|
71 | xdrproc_t proc; |
---|
72 | char *objp; |
---|
73 | { |
---|
74 | XDR x; |
---|
75 | |
---|
76 | x.x_op = XDR_FREE; |
---|
77 | (*proc)(&x, objp); |
---|
78 | } |
---|
79 | |
---|
80 | /* |
---|
81 | * XDR nothing |
---|
82 | */ |
---|
83 | bool_t |
---|
84 | xdr_void(/* xdrs, addr */) |
---|
85 | /* XDR *xdrs; */ |
---|
86 | /* caddr_t addr; */ |
---|
87 | { |
---|
88 | |
---|
89 | return (TRUE); |
---|
90 | } |
---|
91 | |
---|
92 | |
---|
93 | /* |
---|
94 | * XDR integers |
---|
95 | */ |
---|
96 | bool_t |
---|
97 | xdr_int(xdrs, ip) |
---|
98 | XDR *xdrs; |
---|
99 | int *ip; |
---|
100 | { |
---|
101 | long l; |
---|
102 | |
---|
103 | switch (xdrs->x_op) { |
---|
104 | |
---|
105 | case XDR_ENCODE: |
---|
106 | l = (long) *ip; |
---|
107 | return (XDR_PUTLONG(xdrs, &l)); |
---|
108 | |
---|
109 | case XDR_DECODE: |
---|
110 | if (!XDR_GETLONG(xdrs, &l)) { |
---|
111 | return (FALSE); |
---|
112 | } |
---|
113 | *ip = (int) l; |
---|
114 | return (TRUE); |
---|
115 | |
---|
116 | case XDR_FREE: |
---|
117 | return (TRUE); |
---|
118 | } |
---|
119 | return (FALSE); |
---|
120 | } |
---|
121 | |
---|
122 | /* |
---|
123 | * XDR unsigned integers |
---|
124 | */ |
---|
125 | bool_t |
---|
126 | xdr_u_int(xdrs, up) |
---|
127 | XDR *xdrs; |
---|
128 | u_int *up; |
---|
129 | { |
---|
130 | u_long l; |
---|
131 | |
---|
132 | switch (xdrs->x_op) { |
---|
133 | |
---|
134 | case XDR_ENCODE: |
---|
135 | l = (u_long) *up; |
---|
136 | return (XDR_PUTLONG(xdrs, (long *)&l)); |
---|
137 | |
---|
138 | case XDR_DECODE: |
---|
139 | if (!XDR_GETLONG(xdrs, (long *)&l)) { |
---|
140 | return (FALSE); |
---|
141 | } |
---|
142 | *up = (u_int) l; |
---|
143 | return (TRUE); |
---|
144 | |
---|
145 | case XDR_FREE: |
---|
146 | return (TRUE); |
---|
147 | } |
---|
148 | return (FALSE); |
---|
149 | } |
---|
150 | |
---|
151 | |
---|
152 | /* |
---|
153 | * XDR long integers |
---|
154 | * same as xdr_u_long - open coded to save a proc call! |
---|
155 | */ |
---|
156 | bool_t |
---|
157 | xdr_long(xdrs, lp) |
---|
158 | register XDR *xdrs; |
---|
159 | long *lp; |
---|
160 | { |
---|
161 | switch (xdrs->x_op) { |
---|
162 | case XDR_ENCODE: |
---|
163 | return (XDR_PUTLONG(xdrs, lp)); |
---|
164 | case XDR_DECODE: |
---|
165 | return (XDR_GETLONG(xdrs, lp)); |
---|
166 | case XDR_FREE: |
---|
167 | return (TRUE); |
---|
168 | } |
---|
169 | |
---|
170 | return (FALSE); |
---|
171 | } |
---|
172 | |
---|
173 | /* |
---|
174 | * XDR unsigned long integers |
---|
175 | * same as xdr_long - open coded to save a proc call! |
---|
176 | */ |
---|
177 | bool_t |
---|
178 | xdr_u_long(xdrs, ulp) |
---|
179 | register XDR *xdrs; |
---|
180 | u_long *ulp; |
---|
181 | { |
---|
182 | switch (xdrs->x_op) { |
---|
183 | case XDR_ENCODE: |
---|
184 | return (XDR_PUTLONG(xdrs, (long *)ulp)); |
---|
185 | case XDR_DECODE: |
---|
186 | return (XDR_GETLONG(xdrs, (long *)ulp)); |
---|
187 | case XDR_FREE: |
---|
188 | return (TRUE); |
---|
189 | } |
---|
190 | return (FALSE); |
---|
191 | } |
---|
192 | |
---|
193 | |
---|
194 | /* |
---|
195 | * XDR 32-bit integers |
---|
196 | * same as xdr_u_int32_t - open coded to save a proc call! |
---|
197 | */ |
---|
198 | bool_t |
---|
199 | xdr_int32_t(xdrs, int32_p) |
---|
200 | register XDR *xdrs; |
---|
201 | int32_t *int32_p; |
---|
202 | { |
---|
203 | long l; |
---|
204 | |
---|
205 | switch (xdrs->x_op) { |
---|
206 | |
---|
207 | case XDR_ENCODE: |
---|
208 | l = (long) *int32_p; |
---|
209 | return (XDR_PUTLONG(xdrs, &l)); |
---|
210 | |
---|
211 | case XDR_DECODE: |
---|
212 | if (!XDR_GETLONG(xdrs, &l)) { |
---|
213 | return (FALSE); |
---|
214 | } |
---|
215 | *int32_p = (int32_t) l; |
---|
216 | return (TRUE); |
---|
217 | |
---|
218 | case XDR_FREE: |
---|
219 | return (TRUE); |
---|
220 | } |
---|
221 | return (FALSE); |
---|
222 | } |
---|
223 | |
---|
224 | /* |
---|
225 | * XDR unsigned 32-bit integers |
---|
226 | * same as xdr_int32_t - open coded to save a proc call! |
---|
227 | */ |
---|
228 | bool_t |
---|
229 | xdr_u_int32_t(xdrs, u_int32_p) |
---|
230 | register XDR *xdrs; |
---|
231 | u_int32_t *u_int32_p; |
---|
232 | { |
---|
233 | u_long l; |
---|
234 | |
---|
235 | switch (xdrs->x_op) { |
---|
236 | |
---|
237 | case XDR_ENCODE: |
---|
238 | l = (u_long) *u_int32_p; |
---|
239 | return (XDR_PUTLONG(xdrs, (long *)&l)); |
---|
240 | |
---|
241 | case XDR_DECODE: |
---|
242 | if (!XDR_GETLONG(xdrs, (long *)&l)) { |
---|
243 | return (FALSE); |
---|
244 | } |
---|
245 | *u_int32_p = (u_int32_t) l; |
---|
246 | return (TRUE); |
---|
247 | |
---|
248 | case XDR_FREE: |
---|
249 | return (TRUE); |
---|
250 | } |
---|
251 | return (FALSE); |
---|
252 | } |
---|
253 | |
---|
254 | /* |
---|
255 | * XDR 64-bit integers |
---|
256 | */ |
---|
257 | bool_t |
---|
258 | xdr_int64_t(xdrs, int64_p) |
---|
259 | register XDR *xdrs; |
---|
260 | int64_t *int64_p; |
---|
261 | { |
---|
262 | int64_t x; |
---|
263 | |
---|
264 | switch (xdrs->x_op) { |
---|
265 | |
---|
266 | case XDR_ENCODE: |
---|
267 | return (xdr_opaque(xdrs, (caddr_t)int64_p, sizeof(int64_t))); |
---|
268 | |
---|
269 | case XDR_DECODE: |
---|
270 | if (!xdr_opaque(xdrs, (caddr_t)&x, sizeof x)) { |
---|
271 | return (FALSE); |
---|
272 | } |
---|
273 | *int64_p = x; |
---|
274 | return (TRUE); |
---|
275 | |
---|
276 | case XDR_FREE: |
---|
277 | return (TRUE); |
---|
278 | } |
---|
279 | return (FALSE); |
---|
280 | } |
---|
281 | |
---|
282 | /* |
---|
283 | * XDR unsigned 64-bit integers |
---|
284 | */ |
---|
285 | bool_t |
---|
286 | xdr_u_int64_t(xdrs, uint64_p) |
---|
287 | register XDR *xdrs; |
---|
288 | u_int64_t *uint64_p; |
---|
289 | { |
---|
290 | u_int64_t x; |
---|
291 | |
---|
292 | switch (xdrs->x_op) { |
---|
293 | |
---|
294 | case XDR_ENCODE: |
---|
295 | return (xdr_opaque(xdrs, (caddr_t)uint64_p, sizeof(u_int64_t))); |
---|
296 | |
---|
297 | case XDR_DECODE: |
---|
298 | if (!xdr_opaque(xdrs, (caddr_t)&x, sizeof x)) { |
---|
299 | return (FALSE); |
---|
300 | } |
---|
301 | *uint64_p = x; |
---|
302 | return (TRUE); |
---|
303 | |
---|
304 | case XDR_FREE: |
---|
305 | return (TRUE); |
---|
306 | } |
---|
307 | return (FALSE); |
---|
308 | } |
---|
309 | |
---|
310 | |
---|
311 | /* |
---|
312 | * XDR short integers |
---|
313 | */ |
---|
314 | bool_t |
---|
315 | xdr_short(xdrs, sp) |
---|
316 | register XDR *xdrs; |
---|
317 | short *sp; |
---|
318 | { |
---|
319 | long l; |
---|
320 | |
---|
321 | switch (xdrs->x_op) { |
---|
322 | |
---|
323 | case XDR_ENCODE: |
---|
324 | l = (long) *sp; |
---|
325 | return (XDR_PUTLONG(xdrs, &l)); |
---|
326 | |
---|
327 | case XDR_DECODE: |
---|
328 | if (!XDR_GETLONG(xdrs, &l)) { |
---|
329 | return (FALSE); |
---|
330 | } |
---|
331 | *sp = (short) l; |
---|
332 | return (TRUE); |
---|
333 | |
---|
334 | case XDR_FREE: |
---|
335 | return (TRUE); |
---|
336 | } |
---|
337 | return (FALSE); |
---|
338 | } |
---|
339 | |
---|
340 | /* |
---|
341 | * XDR unsigned short integers |
---|
342 | */ |
---|
343 | bool_t |
---|
344 | xdr_u_short(xdrs, usp) |
---|
345 | register XDR *xdrs; |
---|
346 | u_short *usp; |
---|
347 | { |
---|
348 | u_long l; |
---|
349 | |
---|
350 | switch (xdrs->x_op) { |
---|
351 | |
---|
352 | case XDR_ENCODE: |
---|
353 | l = (u_long) *usp; |
---|
354 | return (XDR_PUTLONG(xdrs, (long *)&l)); |
---|
355 | |
---|
356 | case XDR_DECODE: |
---|
357 | if (!XDR_GETLONG(xdrs, (long *)&l)) { |
---|
358 | return (FALSE); |
---|
359 | } |
---|
360 | *usp = (u_short) l; |
---|
361 | return (TRUE); |
---|
362 | |
---|
363 | case XDR_FREE: |
---|
364 | return (TRUE); |
---|
365 | } |
---|
366 | return (FALSE); |
---|
367 | } |
---|
368 | |
---|
369 | |
---|
370 | /* |
---|
371 | * XDR 16-bit integers |
---|
372 | */ |
---|
373 | bool_t |
---|
374 | xdr_int16_t(xdrs, int16_p) |
---|
375 | register XDR *xdrs; |
---|
376 | int16_t *int16_p; |
---|
377 | { |
---|
378 | long l; |
---|
379 | |
---|
380 | switch (xdrs->x_op) { |
---|
381 | |
---|
382 | case XDR_ENCODE: |
---|
383 | l = (long) *int16_p; |
---|
384 | return (XDR_PUTLONG(xdrs, &l)); |
---|
385 | |
---|
386 | case XDR_DECODE: |
---|
387 | if (!XDR_GETLONG(xdrs, &l)) { |
---|
388 | return (FALSE); |
---|
389 | } |
---|
390 | *int16_p = (int16_t) l; |
---|
391 | return (TRUE); |
---|
392 | |
---|
393 | case XDR_FREE: |
---|
394 | return (TRUE); |
---|
395 | } |
---|
396 | return (FALSE); |
---|
397 | } |
---|
398 | |
---|
399 | /* |
---|
400 | * XDR unsigned 16-bit integers |
---|
401 | */ |
---|
402 | bool_t |
---|
403 | xdr_u_int16_t(xdrs, u_int16_p) |
---|
404 | register XDR *xdrs; |
---|
405 | u_int16_t *u_int16_p; |
---|
406 | { |
---|
407 | u_long l; |
---|
408 | |
---|
409 | switch (xdrs->x_op) { |
---|
410 | |
---|
411 | case XDR_ENCODE: |
---|
412 | l = (u_long) *u_int16_p; |
---|
413 | return (XDR_PUTLONG(xdrs, (long *)&l)); |
---|
414 | |
---|
415 | case XDR_DECODE: |
---|
416 | if (!XDR_GETLONG(xdrs, (long *)&l)) { |
---|
417 | return (FALSE); |
---|
418 | } |
---|
419 | *u_int16_p = (u_int16_t) l; |
---|
420 | return (TRUE); |
---|
421 | |
---|
422 | case XDR_FREE: |
---|
423 | return (TRUE); |
---|
424 | } |
---|
425 | return (FALSE); |
---|
426 | } |
---|
427 | |
---|
428 | |
---|
429 | /* |
---|
430 | * XDR a char |
---|
431 | */ |
---|
432 | bool_t |
---|
433 | xdr_char(xdrs, cp) |
---|
434 | XDR *xdrs; |
---|
435 | char *cp; |
---|
436 | { |
---|
437 | int i; |
---|
438 | |
---|
439 | i = (*cp); |
---|
440 | if (!xdr_int(xdrs, &i)) { |
---|
441 | return (FALSE); |
---|
442 | } |
---|
443 | *cp = i; |
---|
444 | return (TRUE); |
---|
445 | } |
---|
446 | |
---|
447 | /* |
---|
448 | * XDR an unsigned char |
---|
449 | */ |
---|
450 | bool_t |
---|
451 | xdr_u_char(xdrs, cp) |
---|
452 | XDR *xdrs; |
---|
453 | u_char *cp; |
---|
454 | { |
---|
455 | u_int u; |
---|
456 | |
---|
457 | u = (*cp); |
---|
458 | if (!xdr_u_int(xdrs, &u)) { |
---|
459 | return (FALSE); |
---|
460 | } |
---|
461 | *cp = u; |
---|
462 | return (TRUE); |
---|
463 | } |
---|
464 | |
---|
465 | /* |
---|
466 | * XDR booleans |
---|
467 | */ |
---|
468 | bool_t |
---|
469 | xdr_bool(xdrs, bp) |
---|
470 | register XDR *xdrs; |
---|
471 | bool_t *bp; |
---|
472 | { |
---|
473 | long lb; |
---|
474 | |
---|
475 | switch (xdrs->x_op) { |
---|
476 | |
---|
477 | case XDR_ENCODE: |
---|
478 | lb = *bp ? XDR_TRUE : XDR_FALSE; |
---|
479 | return (XDR_PUTLONG(xdrs, &lb)); |
---|
480 | |
---|
481 | case XDR_DECODE: |
---|
482 | if (!XDR_GETLONG(xdrs, &lb)) { |
---|
483 | return (FALSE); |
---|
484 | } |
---|
485 | *bp = (lb == XDR_FALSE) ? FALSE : TRUE; |
---|
486 | return (TRUE); |
---|
487 | |
---|
488 | case XDR_FREE: |
---|
489 | return (TRUE); |
---|
490 | } |
---|
491 | return (FALSE); |
---|
492 | } |
---|
493 | |
---|
494 | /* |
---|
495 | * XDR enumerations |
---|
496 | */ |
---|
497 | bool_t |
---|
498 | xdr_enum(xdrs, ep) |
---|
499 | XDR *xdrs; |
---|
500 | enum_t *ep; |
---|
501 | { |
---|
502 | #ifndef lint |
---|
503 | enum sizecheck { SIZEVAL }; /* used to find the size of an enum */ |
---|
504 | |
---|
505 | /* |
---|
506 | * enums are treated as ints |
---|
507 | */ |
---|
508 | if (sizeof (enum sizecheck) == sizeof (long)) { |
---|
509 | return (xdr_long(xdrs, (long *)ep)); |
---|
510 | } else if (sizeof (enum sizecheck) == sizeof (int)) { |
---|
511 | return (xdr_int(xdrs, (int *)ep)); |
---|
512 | } else if (sizeof (enum sizecheck) == sizeof (short)) { |
---|
513 | return (xdr_short(xdrs, (short *)ep)); |
---|
514 | } else { |
---|
515 | return (FALSE); |
---|
516 | } |
---|
517 | #else |
---|
518 | (void) (xdr_short(xdrs, (short *)ep)); |
---|
519 | (void) (xdr_int(xdrs, (int *)ep)); |
---|
520 | return (xdr_long(xdrs, (long *)ep)); |
---|
521 | #endif |
---|
522 | } |
---|
523 | |
---|
524 | /* |
---|
525 | * XDR opaque data |
---|
526 | * Allows the specification of a fixed size sequence of opaque bytes. |
---|
527 | * cp points to the opaque object and cnt gives the byte length. |
---|
528 | */ |
---|
529 | bool_t |
---|
530 | xdr_opaque(xdrs, cp, cnt) |
---|
531 | register XDR *xdrs; |
---|
532 | caddr_t cp; |
---|
533 | register u_int cnt; |
---|
534 | { |
---|
535 | register u_int rndup; |
---|
536 | static int crud[BYTES_PER_XDR_UNIT]; |
---|
537 | |
---|
538 | /* |
---|
539 | * if no data we are done |
---|
540 | */ |
---|
541 | if (cnt == 0) |
---|
542 | return (TRUE); |
---|
543 | |
---|
544 | /* |
---|
545 | * round byte count to full xdr units |
---|
546 | */ |
---|
547 | rndup = cnt % BYTES_PER_XDR_UNIT; |
---|
548 | if (rndup > 0) |
---|
549 | rndup = BYTES_PER_XDR_UNIT - rndup; |
---|
550 | |
---|
551 | if (xdrs->x_op == XDR_DECODE) { |
---|
552 | if (!XDR_GETBYTES(xdrs, cp, cnt)) { |
---|
553 | return (FALSE); |
---|
554 | } |
---|
555 | if (rndup == 0) |
---|
556 | return (TRUE); |
---|
557 | return (XDR_GETBYTES(xdrs, (caddr_t)crud, rndup)); |
---|
558 | } |
---|
559 | |
---|
560 | if (xdrs->x_op == XDR_ENCODE) { |
---|
561 | if (!XDR_PUTBYTES(xdrs, cp, cnt)) { |
---|
562 | return (FALSE); |
---|
563 | } |
---|
564 | if (rndup == 0) |
---|
565 | return (TRUE); |
---|
566 | return (XDR_PUTBYTES(xdrs, xdr_zero, rndup)); |
---|
567 | } |
---|
568 | |
---|
569 | if (xdrs->x_op == XDR_FREE) { |
---|
570 | return (TRUE); |
---|
571 | } |
---|
572 | |
---|
573 | return (FALSE); |
---|
574 | } |
---|
575 | |
---|
576 | /* |
---|
577 | * XDR counted bytes |
---|
578 | * *cpp is a pointer to the bytes, *sizep is the count. |
---|
579 | * If *cpp is NULL maxsize bytes are allocated |
---|
580 | */ |
---|
581 | bool_t |
---|
582 | xdr_bytes(xdrs, cpp, sizep, maxsize) |
---|
583 | register XDR *xdrs; |
---|
584 | char **cpp; |
---|
585 | register u_int *sizep; |
---|
586 | u_int maxsize; |
---|
587 | { |
---|
588 | register char *sp = *cpp; /* sp is the actual string pointer */ |
---|
589 | register u_int nodesize; |
---|
590 | |
---|
591 | /* |
---|
592 | * first deal with the length since xdr bytes are counted |
---|
593 | */ |
---|
594 | if (! xdr_u_int(xdrs, sizep)) { |
---|
595 | return (FALSE); |
---|
596 | } |
---|
597 | nodesize = *sizep; |
---|
598 | if ((nodesize > maxsize) && (xdrs->x_op != XDR_FREE)) { |
---|
599 | return (FALSE); |
---|
600 | } |
---|
601 | |
---|
602 | /* |
---|
603 | * now deal with the actual bytes |
---|
604 | */ |
---|
605 | switch (xdrs->x_op) { |
---|
606 | |
---|
607 | case XDR_DECODE: |
---|
608 | if (nodesize == 0) { |
---|
609 | return (TRUE); |
---|
610 | } |
---|
611 | if (sp == NULL) { |
---|
612 | *cpp = sp = (char *)mem_alloc(nodesize); |
---|
613 | } |
---|
614 | if (sp == NULL) { |
---|
615 | (void) fprintf(stderr, "xdr_bytes: out of memory\n"); |
---|
616 | return (FALSE); |
---|
617 | } |
---|
618 | /* fall into ... */ |
---|
619 | |
---|
620 | case XDR_ENCODE: |
---|
621 | return (xdr_opaque(xdrs, sp, nodesize)); |
---|
622 | |
---|
623 | case XDR_FREE: |
---|
624 | if (sp != NULL) { |
---|
625 | mem_free(sp, nodesize); |
---|
626 | *cpp = NULL; |
---|
627 | } |
---|
628 | return (TRUE); |
---|
629 | } |
---|
630 | return (FALSE); |
---|
631 | } |
---|
632 | |
---|
633 | /* |
---|
634 | * Implemented here due to commonality of the object. |
---|
635 | */ |
---|
636 | bool_t |
---|
637 | xdr_netobj(xdrs, np) |
---|
638 | XDR *xdrs; |
---|
639 | struct netobj *np; |
---|
640 | { |
---|
641 | |
---|
642 | return (xdr_bytes(xdrs, &np->n_bytes, &np->n_len, MAX_NETOBJ_SZ)); |
---|
643 | } |
---|
644 | |
---|
645 | /* |
---|
646 | * XDR a descriminated union |
---|
647 | * Support routine for discriminated unions. |
---|
648 | * You create an array of xdrdiscrim structures, terminated with |
---|
649 | * an entry with a null procedure pointer. The routine gets |
---|
650 | * the discriminant value and then searches the array of xdrdiscrims |
---|
651 | * looking for that value. It calls the procedure given in the xdrdiscrim |
---|
652 | * to handle the discriminant. If there is no specific routine a default |
---|
653 | * routine may be called. |
---|
654 | * If there is no specific or default routine an error is returned. |
---|
655 | */ |
---|
656 | bool_t |
---|
657 | xdr_union(xdrs, dscmp, unp, choices, dfault) |
---|
658 | register XDR *xdrs; |
---|
659 | enum_t *dscmp; /* enum to decide which arm to work on */ |
---|
660 | char *unp; /* the union itself */ |
---|
661 | struct xdr_discrim *choices; /* [value, xdr proc] for each arm */ |
---|
662 | xdrproc_t dfault; /* default xdr routine */ |
---|
663 | { |
---|
664 | register enum_t dscm; |
---|
665 | |
---|
666 | /* |
---|
667 | * we deal with the discriminator; it's an enum |
---|
668 | */ |
---|
669 | if (! xdr_enum(xdrs, dscmp)) { |
---|
670 | return (FALSE); |
---|
671 | } |
---|
672 | dscm = *dscmp; |
---|
673 | |
---|
674 | /* |
---|
675 | * search choices for a value that matches the discriminator. |
---|
676 | * if we find one, execute the xdr routine for that value. |
---|
677 | */ |
---|
678 | for (; choices->proc != NULL_xdrproc_t; choices++) { |
---|
679 | if (choices->value == dscm) |
---|
680 | return ((*(choices->proc))(xdrs, unp, LASTUNSIGNED)); |
---|
681 | } |
---|
682 | |
---|
683 | /* |
---|
684 | * no match - execute the default xdr routine if there is one |
---|
685 | */ |
---|
686 | return ((dfault == NULL_xdrproc_t) ? FALSE : |
---|
687 | (*dfault)(xdrs, unp, LASTUNSIGNED)); |
---|
688 | } |
---|
689 | |
---|
690 | |
---|
691 | /* |
---|
692 | * Non-portable xdr primitives. |
---|
693 | * Care should be taken when moving these routines to new architectures. |
---|
694 | */ |
---|
695 | |
---|
696 | |
---|
697 | /* |
---|
698 | * XDR null terminated ASCII strings |
---|
699 | * xdr_string deals with "C strings" - arrays of bytes that are |
---|
700 | * terminated by a NULL character. The parameter cpp references a |
---|
701 | * pointer to storage; If the pointer is null, then the necessary |
---|
702 | * storage is allocated. The last parameter is the max allowed length |
---|
703 | * of the string as specified by a protocol. |
---|
704 | */ |
---|
705 | bool_t |
---|
706 | xdr_string(xdrs, cpp, maxsize) |
---|
707 | register XDR *xdrs; |
---|
708 | char **cpp; |
---|
709 | u_int maxsize; |
---|
710 | { |
---|
711 | register char *sp = *cpp; /* sp is the actual string pointer */ |
---|
712 | u_int size; |
---|
713 | u_int nodesize; |
---|
714 | |
---|
715 | /* |
---|
716 | * first deal with the length since xdr strings are counted-strings |
---|
717 | */ |
---|
718 | switch (xdrs->x_op) { |
---|
719 | case XDR_FREE: |
---|
720 | if (sp == NULL) { |
---|
721 | return(TRUE); /* already free */ |
---|
722 | } |
---|
723 | /* fall through... */ |
---|
724 | case XDR_ENCODE: |
---|
725 | size = strlen(sp); |
---|
726 | break; |
---|
727 | } |
---|
728 | if (! xdr_u_int(xdrs, &size)) { |
---|
729 | return (FALSE); |
---|
730 | } |
---|
731 | if (size > maxsize) { |
---|
732 | return (FALSE); |
---|
733 | } |
---|
734 | nodesize = size + 1; |
---|
735 | |
---|
736 | /* |
---|
737 | * now deal with the actual bytes |
---|
738 | */ |
---|
739 | switch (xdrs->x_op) { |
---|
740 | |
---|
741 | case XDR_DECODE: |
---|
742 | if (nodesize == 0) { |
---|
743 | return (TRUE); |
---|
744 | } |
---|
745 | if (sp == NULL) |
---|
746 | *cpp = sp = (char *)mem_alloc(nodesize); |
---|
747 | if (sp == NULL) { |
---|
748 | (void) fprintf(stderr, "xdr_string: out of memory\n"); |
---|
749 | return (FALSE); |
---|
750 | } |
---|
751 | sp[size] = 0; |
---|
752 | /* fall into ... */ |
---|
753 | |
---|
754 | case XDR_ENCODE: |
---|
755 | return (xdr_opaque(xdrs, sp, size)); |
---|
756 | |
---|
757 | case XDR_FREE: |
---|
758 | mem_free(sp, nodesize); |
---|
759 | *cpp = NULL; |
---|
760 | return (TRUE); |
---|
761 | } |
---|
762 | return (FALSE); |
---|
763 | } |
---|
764 | |
---|
765 | /* |
---|
766 | * Wrapper for xdr_string that can be called directly from |
---|
767 | * routines like clnt_call |
---|
768 | */ |
---|
769 | bool_t |
---|
770 | xdr_wrapstring(xdrs, cpp) |
---|
771 | XDR *xdrs; |
---|
772 | char **cpp; |
---|
773 | { |
---|
774 | return xdr_string(xdrs, cpp, LASTUNSIGNED); |
---|
775 | } |
---|