summaryrefslogtreecommitdiff
path: root/libc/inet/rpc/xdr.c
blob: 335702c0fc15275497e0813c9353936d7d85d68e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
/* @(#)xdr.c	2.1 88/07/29 4.0 RPCSRC */
/*
 * 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
 */
#if 0
static char sccsid[] = "@(#)xdr.c 1.35 87/08/12";
#endif

/*
 * xdr.c, Generic XDR routines implementation.
 *
 * Copyright (C) 1986, Sun Microsystems, Inc.
 *
 * These are the "generic" xdr routines used to serialize and de-serialize
 * most common data items.  See xdr.h for more info on the interface to
 * xdr.
 */

#define __FORCE_GLIBC
#include <features.h>

#include <stdio.h>
#include <limits.h>
#include <string.h>

#include <rpc/types.h>
#include <rpc/xdr.h>

#ifdef USE_IN_LIBIO
# include <wchar.h>
/* libc_hidden_proto(fwprintf) */
#endif

/* Experimentally off - libc_hidden_proto(strlen) */
/* libc_hidden_proto(fputs) */

/*
 * constants specific to the xdr "protocol"
 */
#define XDR_FALSE	((long) 0)
#define XDR_TRUE	((long) 1)
#define LASTUNSIGNED	((u_int) 0-1)

/*
 * for unit alignment
 */
static const char xdr_zero[BYTES_PER_XDR_UNIT] = {0, 0, 0, 0};

/*
 * Free a data structure using XDR
 * Not a filter, but a convenient utility nonetheless
 */
void
xdr_free (xdrproc_t proc, char *objp)
{
  XDR x;

  x.x_op = XDR_FREE;
  (*proc) (&x, objp);
}

/*
 * XDR nothing
 */
libc_hidden_proto(xdr_void)
bool_t
xdr_void (void)
{
  return TRUE;
}
libc_hidden_def(xdr_void)

/*
 * XDR long integers
 * The definition of xdr_long() is kept for backward
 * compatibility. Instead xdr_int() should be used.
 */
libc_hidden_proto(xdr_long)
bool_t
xdr_long (XDR *xdrs, long *lp)
{

  if (xdrs->x_op == XDR_ENCODE
      && (sizeof (int32_t) == sizeof (long)
	  || (int32_t) *lp == *lp))
    return XDR_PUTLONG (xdrs, lp);

  if (xdrs->x_op == XDR_DECODE)
    return XDR_GETLONG (xdrs, lp);

  if (xdrs->x_op == XDR_FREE)
    return TRUE;

  return FALSE;
}
libc_hidden_def(xdr_long)

/*
 * XDR short integers
 */
libc_hidden_proto(xdr_short)
bool_t
xdr_short (XDR *xdrs, short *sp)
{
  long l;

  switch (xdrs->x_op)
    {
    case XDR_ENCODE:
      l = (long) *sp;
      return XDR_PUTLONG (xdrs, &l);

    case XDR_DECODE:
      if (!XDR_GETLONG (xdrs, &l))
	{
	  return FALSE;
	}
      *sp = (short) l;
      return TRUE;

    case XDR_FREE:
      return TRUE;
    }
  return FALSE;
}
libc_hidden_def(xdr_short)

/*
 * XDR integers
 */
libc_hidden_proto(xdr_int)
bool_t
xdr_int (XDR *xdrs, int *ip)
{

#if INT_MAX < LONG_MAX
  long l;

  switch (xdrs->x_op)
    {
    case XDR_ENCODE:
      l = (long) *ip;
      return XDR_PUTLONG (xdrs, &l);

    case XDR_DECODE:
      if (!XDR_GETLONG (xdrs, &l))
	{
	  return FALSE;
	}
      *ip = (int) l;
    case XDR_FREE:
      return TRUE;
    }
  return FALSE;
#elif INT_MAX == LONG_MAX
  return xdr_long (xdrs, (long *) ip);
#elif INT_MAX == SHRT_MAX
  return xdr_short (xdrs, (short *) ip);
#else
#error unexpected integer sizes in xdr_int()
#endif
}
libc_hidden_def(xdr_int)

/*
 * XDR unsigned long integers
 * The definition of xdr_u_long() is kept for backward
 * compatibility. Instead xdr_u_int() should be used.
 */
libc_hidden_proto(xdr_u_long)
bool_t
xdr_u_long (XDR *xdrs, u_long *ulp)
{
  switch (xdrs->x_op)
    {
    case XDR_DECODE:
      {
	long int tmp;

	if (XDR_GETLONG (xdrs, &tmp) == FALSE)
	  return FALSE;

	*ulp = (uint32_t) tmp;
	return TRUE;
      }

    case XDR_ENCODE:
      if (sizeof (uint32_t) != sizeof (u_long)
	  && (uint32_t) *ulp != *ulp)
	return FALSE;

      return XDR_PUTLONG (xdrs, (long *) ulp);

    case XDR_FREE:
      return TRUE;
    }
  return FALSE;
}
libc_hidden_def(xdr_u_long)

/*
 * XDR unsigned integers
 */
libc_hidden_proto(xdr_u_int)
bool_t
xdr_u_int (XDR *xdrs, u_int *up)
{
#if UINT_MAX < ULONG_MAX
  u_long l;

  switch (xdrs->x_op)
    {
    case XDR_ENCODE:
      l = (u_long) * up;
      return XDR_PUTLONG (xdrs, &l);

    case XDR_DECODE:
      if (!XDR_GETLONG (xdrs, &l))
	{
	  return FALSE;
	}
      *up = (u_int) l;
    case XDR_FREE:
      return TRUE;
    }
  return FALSE;
#elif UINT_MAX == ULONG_MAX
  return xdr_u_long (xdrs, (u_long *) up);
#elif UINT_MAX == USHRT_MAX
  return xdr_short (xdrs, (short *) up);
#else
#error unexpected integer sizes in xdr_u_int()
#endif
}
libc_hidden_def(xdr_u_int)

/*
 * XDR hyper integers
 * same as xdr_u_hyper - open coded to save a proc call!
 */
libc_hidden_proto(xdr_hyper)
bool_t
xdr_hyper (XDR *xdrs, quad_t *llp)
{
  long t1;
  unsigned long int t2;

  if (xdrs->x_op == XDR_ENCODE)
    {
      t1 = (long) ((*llp) >> 32);
      t2 = (long) (*llp);
      return (XDR_PUTLONG(xdrs, &t1) && XDR_PUTLONG(xdrs, &t2));
    }

  if (xdrs->x_op == XDR_DECODE)
    {
      if (!XDR_GETLONG(xdrs, &t1) || !XDR_GETLONG(xdrs, &t2))
	return FALSE;
      *llp = ((quad_t) t1) << 32;
      *llp |= t2;
      return TRUE;
    }

  if (xdrs->x_op == XDR_FREE)
    return TRUE;

  return FALSE;
}
libc_hidden_def(xdr_hyper)


/*
 * XDR hyper integers
 * same as xdr_hyper - open coded to save a proc call!
 */
libc_hidden_proto(xdr_u_hyper)
bool_t
xdr_u_hyper (XDR *xdrs, u_quad_t *ullp)
{
  unsigned long t1;
  unsigned long t2;

  if (xdrs->x_op == XDR_ENCODE)
    {
      t1 = (unsigned long) ((*ullp) >> 32);
      t2 = (unsigned long) (*ullp);
      return (XDR_PUTLONG(xdrs, &t1) && XDR_PUTLONG(xdrs, &t2));
    }

  if (xdrs->x_op == XDR_DECODE)
    {
      if (!XDR_GETLONG(xdrs, &t1) || !XDR_GETLONG(xdrs, &t2))
	return FALSE;
      *ullp = ((u_quad_t) t1) << 32;
      *ullp |= t2;
      return TRUE;
    }

  if (xdrs->x_op == XDR_FREE)
    return TRUE;

  return FALSE;
}
libc_hidden_def(xdr_u_hyper)

bool_t
xdr_longlong_t (XDR *xdrs, quad_t *llp)
{
  return xdr_hyper (xdrs, llp);
}

bool_t
xdr_u_longlong_t (XDR *xdrs, u_quad_t *ullp)
{
  return xdr_u_hyper (xdrs, ullp);
}

/*
 * XDR unsigned short integers
 */
libc_hidden_proto(xdr_u_short)
bool_t
xdr_u_short (XDR *xdrs, u_short *usp)
{
  u_long l;

  switch (xdrs->x_op)
    {
    case XDR_ENCODE:
      l = (u_long) * usp;
      return XDR_PUTLONG (xdrs, &l);

    case XDR_DECODE:
      if (!XDR_GETLONG (xdrs, &l))
	{
	  return FALSE;
	}
      *usp = (u_short) l;
      return TRUE;

    case XDR_FREE:
      return TRUE;
    }
  return FALSE;
}
libc_hidden_def(xdr_u_short)


/*
 * XDR a char
 */
bool_t
xdr_char (XDR *xdrs, char *cp)
{
  int i;

  i = (*cp);
  if (!xdr_int (xdrs, &i))
    {
      return FALSE;
    }
  *cp = i;
  return TRUE;
}

/*
 * XDR an unsigned char
 */
bool_t
xdr_u_char (XDR *xdrs, u_char *cp)
{
  u_int u;

  u = (*cp);
  if (!xdr_u_int (xdrs, &u))
    {
      return FALSE;
    }
  *cp = u;
  return TRUE;
}

/*
 * XDR booleans
 */
libc_hidden_proto(xdr_bool)
bool_t
xdr_bool (XDR *xdrs, bool_t *bp)
{
  long lb;

  switch (xdrs->x_op)
    {
    case XDR_ENCODE:
      lb = *bp ? XDR_TRUE : XDR_FALSE;
      return XDR_PUTLONG (xdrs, &lb);

    case XDR_DECODE:
      if (!XDR_GETLONG (xdrs, &lb))
	{
	  return FALSE;
	}
      *bp = (lb == XDR_FALSE) ? FALSE : TRUE;
      return TRUE;

    case XDR_FREE:
      return TRUE;
    }
  return FALSE;
}
libc_hidden_def(xdr_bool)

/*
 * XDR enumerations
 */
libc_hidden_proto(xdr_enum)
bool_t
xdr_enum (XDR *xdrs, enum_t *ep)
{
  enum sizecheck
    {
      SIZEVAL
    };				/* used to find the size of an enum */

  /*
   * enums are treated as ints
   */
  if (sizeof (enum sizecheck) == 4)
    {
#if INT_MAX < LONG_MAX
      long l;

      switch (xdrs->x_op)
	{
	case XDR_ENCODE:
	  l = *ep;
	  return XDR_PUTLONG (xdrs, &l);

	case XDR_DECODE:
	  if (!XDR_GETLONG (xdrs, &l))
	    {
	      return FALSE;
	    }
	  *ep = l;
	case XDR_FREE:
	  return TRUE;

	}
      return FALSE;
#else
      return xdr_long (xdrs, (long *) ep);
#endif
    }
  else if (sizeof (enum sizecheck) == sizeof (short))
    {
      return xdr_short (xdrs, (short *) ep);
    }
  else
    {
      return FALSE;
    }
}
libc_hidden_def(xdr_enum)

/*
 * XDR opaque data
 * Allows the specification of a fixed size sequence of opaque bytes.
 * cp points to the opaque object and cnt gives the byte length.
 */
libc_hidden_proto(xdr_opaque)
bool_t
xdr_opaque (XDR *xdrs, caddr_t cp, u_int cnt)
{
  u_int rndup;
  static char crud[BYTES_PER_XDR_UNIT];

  /*
   * if no data we are done
   */
  if (cnt == 0)
    return TRUE;

  /*
   * round byte count to full xdr units
   */
  rndup = cnt % BYTES_PER_XDR_UNIT;
  if (rndup > 0)
    rndup = BYTES_PER_XDR_UNIT - rndup;

  switch (xdrs->x_op)
    {
    case XDR_DECODE:
      if (!XDR_GETBYTES (xdrs, cp, cnt))
	{
	  return FALSE;
	}
      if (rndup == 0)
	return TRUE;
      return XDR_GETBYTES (xdrs, (caddr_t)crud, rndup);

    case XDR_ENCODE:
      if (!XDR_PUTBYTES (xdrs, cp, cnt))
	{
	  return FALSE;
	}
      if (rndup == 0)
	return TRUE;
      return XDR_PUTBYTES (xdrs, xdr_zero, rndup);

    case XDR_FREE:
      return TRUE;
    }
  return FALSE;
}
libc_hidden_def(xdr_opaque)

/*
 * XDR counted bytes
 * *cpp is a pointer to the bytes, *sizep is the count.
 * If *cpp is NULL maxsize bytes are allocated
 */
libc_hidden_proto(xdr_bytes)
bool_t
xdr_bytes (XDR *xdrs, char **cpp, u_int *sizep, u_int maxsize)
{
  char *sp = *cpp;	/* sp is the actual string pointer */
  u_int nodesize;

  /*
   * first deal with the length since xdr bytes are counted
   */
  if (!xdr_u_int (xdrs, sizep))
    {
      return FALSE;
    }
  nodesize = *sizep;
  if ((nodesize > maxsize) && (xdrs->x_op != XDR_FREE))
    {
      return FALSE;
    }

  /*
   * now deal with the actual bytes
   */
  switch (xdrs->x_op)
    {
    case XDR_DECODE:
      if (nodesize == 0)
	{
	  return TRUE;
	}
      if (sp == NULL)
	{
	  *cpp = sp = (char *) mem_alloc (nodesize);
	}
      if (sp == NULL)
	{
#ifdef USE_IN_LIBIO
	  if (_IO_fwide (stderr, 0) > 0)
	    (void) fwprintf (stderr, L"%s", _("xdr_bytes: out of memory\n"));
	  else
#endif
	    (void) fputs (_("xdr_bytes: out of memory\n"), stderr);
	  return FALSE;
	}
      /* fall into ... */

    case XDR_ENCODE:
      return xdr_opaque (xdrs, sp, nodesize);

    case XDR_FREE:
      if (sp != NULL)
	{
	  mem_free (sp, nodesize);
	  *cpp = NULL;
	}
      return TRUE;
    }
  return FALSE;
}
libc_hidden_def(xdr_bytes)

/*
 * Implemented here due to commonality of the object.
 */
bool_t
xdr_netobj (xdrs, np)
     XDR *xdrs;
     struct netobj *np;
{

  return xdr_bytes (xdrs, &np->n_bytes, &np->n_len, MAX_NETOBJ_SZ);
}

/*
 * XDR a discriminated union
 * Support routine for discriminated unions.
 * You create an array of xdrdiscrim structures, terminated with
 * an entry with a null procedure pointer.  The routine gets
 * the discriminant value and then searches the array of xdrdiscrims
 * looking for that value.  It calls the procedure given in the xdrdiscrim
 * to handle the discriminant.  If there is no specific routine a default
 * routine may be called.
 * If there is no specific or default routine an error is returned.
 */
libc_hidden_proto(xdr_union)
bool_t
xdr_union (XDR *xdrs, enum_t *dscmp, char *unp, const struct xdr_discrim *choices, xdrproc_t dfault)
{
  enum_t dscm;

  /*
   * we deal with the discriminator;  it's an enum
   */
  if (!xdr_enum (xdrs, dscmp))
    {
      return FALSE;
    }
  dscm = *dscmp;

  /*
   * search choices for a value that matches the discriminator.
   * if we find one, execute the xdr routine for that value.
   */
  for (; choices->proc != NULL_xdrproc_t; choices++)
    {
      if (choices->value == dscm)
	return (*(choices->proc)) (xdrs, unp, LASTUNSIGNED);
    }

  /*
   * no match - execute the default xdr routine if there is one
   */
  return ((dfault == NULL_xdrproc_t) ? FALSE :
	  (*dfault) (xdrs, unp, LASTUNSIGNED));
}
libc_hidden_def(xdr_union)

/*
 * Non-portable xdr primitives.
 * Care should be taken when moving these routines to new architectures.
 */


/*
 * XDR null terminated ASCII strings
 * xdr_string deals with "C strings" - arrays of bytes that are
 * terminated by a NULL character.  The parameter cpp references a
 * pointer to storage; If the pointer is null, then the necessary
 * storage is allocated.  The last parameter is the max allowed length
 * of the string as specified by a protocol.
 */
libc_hidden_proto(xdr_string)
bool_t
xdr_string (XDR *xdrs, char **cpp, u_int maxsize)
{
  char *sp = *cpp;	/* sp is the actual string pointer */
  u_int size;
  u_int nodesize;

  /*
   * first deal with the length since xdr strings are counted-strings
   */
  switch (xdrs->x_op)
    {
    case XDR_FREE:
      if (sp == NULL)
	{
	  return TRUE;		/* already free */
	}
      /* fall through... */
    case XDR_ENCODE:
      if (sp == NULL)
	return FALSE;
      size = strlen (sp);
      break;
    case XDR_DECODE:
      break;
    }
  if (!xdr_u_int (xdrs, &size))
    {
      return FALSE;
    }
  if (size > maxsize)
    {
      return FALSE;
    }
  nodesize = size + 1;

  /*
   * now deal with the actual bytes
   */
  switch (xdrs->x_op)
    {
    case XDR_DECODE:
      if (nodesize == 0)
	{
	  return TRUE;
	}
      if (sp == NULL)
	*cpp = sp = (char *) mem_alloc (nodesize);
      if (sp == NULL)
	{
#ifdef USE_IN_LIBIO
	  if (_IO_fwide (stderr, 0) > 0)
	    (void) fwprintf (stderr, L"%s",
			       _("xdr_string: out of memory\n"));
	  else
#endif
	    (void) fputs (_("xdr_string: out of memory\n"), stderr);
	  return FALSE;
	}
      sp[size] = 0;
      /* fall into ... */

    case XDR_ENCODE:
      return xdr_opaque (xdrs, sp, size);

    case XDR_FREE:
      mem_free (sp, nodesize);
      *cpp = NULL;
      return TRUE;
    }
  return FALSE;
}
libc_hidden_def(xdr_string)

/*
 * Wrapper for xdr_string that can be called directly from
 * routines like clnt_call
 */
bool_t
xdr_wrapstring (xdrs, cpp)
     XDR *xdrs;
     char **cpp;
{
  if (xdr_string (xdrs, cpp, LASTUNSIGNED))
    {
      return TRUE;
    }
  return FALSE;
}