projects / dragonfly.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | history | HEAD
AMD64 - Fix many compile-time warnings. int/ptr type mismatches, %llx, etc.
[dragonfly.git] / sys / netgraph / netgraph / ng_parse.c
CommitLineData
984263bc
MD		 1
2/*
3 * ng_parse.c
4 *
5 * Copyright (c) 1999 Whistle Communications, Inc.
6 * All rights reserved.
7 *
8 * Subject to the following obligations and disclaimer of warranty, use and
9 * redistribution of this software, in source or object code forms, with or
10 * without modifications are expressly permitted by Whistle Communications;
11 * provided, however, that:
12 * 1. Any and all reproductions of the source or object code must include the
13 * copyright notice above and the following disclaimer of warranties; and
14 * 2. No rights are granted, in any manner or form, to use Whistle
15 * Communications, Inc. trademarks, including the mark "WHISTLE
16 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as
17 * such appears in the above copyright notice or in the software.
18 *
19 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
20 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
21 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
22 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
23 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
24 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
25 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
26 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
27 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
28 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
29 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
30 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
31 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
35 * OF SUCH DAMAGE.
36 *
37 * Author: Archie Cobbs <archie@freebsd.org>
38 *
39 * $Whistle: ng_parse.c,v 1.3 1999/11/29 01:43:48 archie Exp $
40 * $FreeBSD: src/sys/netgraph/ng_parse.c,v 1.3.2.8 2002/07/02 23:44:02 archie Exp $
e7b4468c 41 * $DragonFly: src/sys/netgraph/netgraph/ng_parse.c,v 1.10 2008/01/05 14:02:39 swildner Exp $
984263bc
MD		 42 */
43
44#include <sys/types.h>
45#include <sys/param.h>
46#include <sys/systm.h>
47#include <sys/errno.h>
48#include <sys/malloc.h>
49#include <sys/ctype.h>
50
51#include <netinet/in.h>
52
53#include <netgraph/ng_message.h>
54#include <netgraph/netgraph.h>
d2438d69 55#include <netgraph/ng_parse.h>
984263bc
MD		 56
57/* Compute alignment for primitive integral types */
58struct int16_temp {
59 char x;
60 int16_t y;
61};
62
63struct int32_temp {
64 char x;
65 int32_t y;
66};
67
68struct int64_temp {
69 char x;
70 int64_t y;
71};
72
73#define INT8_ALIGNMENT 1
74#define INT16_ALIGNMENT ((int)&((struct int16_temp *)0)->y)
75#define INT32_ALIGNMENT ((int)&((struct int32_temp *)0)->y)
76#define INT64_ALIGNMENT ((int)&((struct int64_temp *)0)->y)
77
78/* Output format for integral types */
79#define INT_UNSIGNED 0
80#define INT_SIGNED 1
81#define INT_HEX 2
82
83/* Type of composite object: struct, array, or fixedarray */
84enum comptype {
85 CT_STRUCT,
86 CT_ARRAY,
87 CT_FIXEDARRAY,
88};
89
90/* Composite types helper functions */
91static int ng_parse_composite(const struct ng_parse_type *type,
92 const char *s, int *off, const u_char *start,
93 u_char *const buf, int *buflen, enum comptype ctype);
94static int ng_unparse_composite(const struct ng_parse_type *type,
95 const u_char *data, int *off, char *cbuf, int cbuflen,
96 enum comptype ctype);
97static int ng_get_composite_elem_default(const struct ng_parse_type *type,
98 int index, const u_char *start, u_char *buf,
99 int *buflen, enum comptype ctype);
100static int ng_get_composite_len(const struct ng_parse_type *type,
101 const u_char *start, const u_char *buf,
102 enum comptype ctype);
103static const struct ng_parse_type *ng_get_composite_etype(const struct
104 ng_parse_type *type, int index, enum comptype ctype);
105static int ng_parse_get_elem_pad(const struct ng_parse_type *type,
106 int index, enum comptype ctype, int posn);
107
108/* Parsing helper functions */
109static int ng_parse_skip_value(const char *s, int off, int *lenp);
110
111/* Poor man's virtual method calls */
112#define METHOD(t,m) (ng_get_ ## m ## _method(t))
113#define INVOKE(t,m) (*METHOD(t,m))
114
115static ng_parse_t *ng_get_parse_method(const struct ng_parse_type *t);
116static ng_unparse_t *ng_get_unparse_method(const struct ng_parse_type *t);
117static ng_getDefault_t *ng_get_getDefault_method(const
118 struct ng_parse_type *t);
119static ng_getAlign_t *ng_get_getAlign_method(const struct ng_parse_type *t);
120
121#define ALIGNMENT(t) (METHOD(t, getAlign) == NULL ? \
122 0 : INVOKE(t, getAlign)(t))
123
124/* For converting binary to string */
125#define NG_PARSE_APPEND(fmt, args...) \
126 do { \
127 int len; \
128 \
f8c7a42d 129 len = ksnprintf((cbuf), (cbuflen), \
984263bc
MD		 130 fmt , ## args); \
131 if (len >= (cbuflen)) \
132 return (ERANGE); \
133 (cbuf) += len; \
134 (cbuflen) -= len; \
135 } while (0)
136
137/************************************************************************
138 PUBLIC FUNCTIONS
139 ************************************************************************/
140
141/*
142 * Convert an ASCII string to binary according to the supplied type descriptor
143 */
144int
145ng_parse(const struct ng_parse_type *type,
146 const char *string, int *off, u_char *buf, int *buflen)
147{
148 return INVOKE(type, parse)(type, string, off, buf, buf, buflen);
149}
150
151/*
152 * Convert binary to an ASCII string according to the supplied type descriptor
153 */
154int
155ng_unparse(const struct ng_parse_type *type,
156 const u_char *data, char *cbuf, int cbuflen)
157{
158 int off = 0;
159
160 return INVOKE(type, unparse)(type, data, &off, cbuf, cbuflen);
161}
162
163/*
164 * Fill in the default value according to the supplied type descriptor
165 */
166int
167ng_parse_getDefault(const struct ng_parse_type *type, u_char *buf, int *buflen)
168{
169 ng_getDefault_t *const func = METHOD(type, getDefault);
170
171 if (func == NULL)
172 return (EOPNOTSUPP);
173 return (*func)(type, buf, buf, buflen);
174}
175
176
177/************************************************************************
178 STRUCTURE TYPE
179 ************************************************************************/
180
181static int
182ng_struct_parse(const struct ng_parse_type *type,
183 const char *s, int *off, const u_char *const start,
184 u_char *const buf, int *buflen)
185{
186 return ng_parse_composite(type, s, off, start, buf, buflen, CT_STRUCT);
187}
188
189static int
190ng_struct_unparse(const struct ng_parse_type *type,
191 const u_char *data, int *off, char *cbuf, int cbuflen)
192{
193 return ng_unparse_composite(type, data, off, cbuf, cbuflen, CT_STRUCT);
194}
195
196static int
197ng_struct_getDefault(const struct ng_parse_type *type,
198 const u_char *const start, u_char *buf, int *buflen)
199{
200 int off = 0;
201
202 return ng_parse_composite(type,
203 "{}", &off, start, buf, buflen, CT_STRUCT);
204}
205
206static int
207ng_struct_getAlign(const struct ng_parse_type *type)
208{
209 const struct ng_parse_struct_field *field;
210 int align = 0;
211
212 for (field = type->info; field->name != NULL; field++) {
213 int falign = ALIGNMENT(field->type);
214
215 if (falign > align)
216 align = falign;
217 }
218 return align;
219}
220
221const struct ng_parse_type ng_parse_struct_type = {
222 NULL,
223 NULL,
224 NULL,
225 ng_struct_parse,
226 ng_struct_unparse,
227 ng_struct_getDefault,
228 ng_struct_getAlign
229};
230
231/************************************************************************
232 FIXED LENGTH ARRAY TYPE
233 ************************************************************************/
234
235static int
236ng_fixedarray_parse(const struct ng_parse_type *type,
237 const char *s, int *off, const u_char *const start,
238 u_char *const buf, int *buflen)
239{
240 return ng_parse_composite(type,
241 s, off, start, buf, buflen, CT_FIXEDARRAY);
242}
243
244static int
245ng_fixedarray_unparse(const struct ng_parse_type *type,
246 const u_char *data, int *off, char *cbuf, int cbuflen)
247{
248 return ng_unparse_composite(type,
249 data, off, cbuf, cbuflen, CT_FIXEDARRAY);
250}
251
252static int
253ng_fixedarray_getDefault(const struct ng_parse_type *type,
254 const u_char *const start, u_char *buf, int *buflen)
255{
256 int off = 0;
257
258 return ng_parse_composite(type,
259 "[]", &off, start, buf, buflen, CT_FIXEDARRAY);
260}
261
262static int
263ng_fixedarray_getAlign(const struct ng_parse_type *type)
264{
265 const struct ng_parse_fixedarray_info *fi = type->info;
266
267 return ALIGNMENT(fi->elementType);
268}
269
270const struct ng_parse_type ng_parse_fixedarray_type = {
271 NULL,
272 NULL,
273 NULL,
274 ng_fixedarray_parse,
275 ng_fixedarray_unparse,
276 ng_fixedarray_getDefault,
277 ng_fixedarray_getAlign
278};
279
280/************************************************************************
281 VARIABLE LENGTH ARRAY TYPE
282 ************************************************************************/
283
284static int
285ng_array_parse(const struct ng_parse_type *type,
286 const char *s, int *off, const u_char *const start,
287 u_char *const buf, int *buflen)
288{
289 return ng_parse_composite(type, s, off, start, buf, buflen, CT_ARRAY);
290}
291
292static int
293ng_array_unparse(const struct ng_parse_type *type,
294 const u_char *data, int *off, char *cbuf, int cbuflen)
295{
296 return ng_unparse_composite(type, data, off, cbuf, cbuflen, CT_ARRAY);
297}
298
299static int
300ng_array_getDefault(const struct ng_parse_type *type,
301 const u_char *const start, u_char *buf, int *buflen)
302{
303 int off = 0;
304
305 return ng_parse_composite(type,
306 "[]", &off, start, buf, buflen, CT_ARRAY);
307}
308
309static int
310ng_array_getAlign(const struct ng_parse_type *type)
311{
312 const struct ng_parse_array_info *ai = type->info;
313
314 return ALIGNMENT(ai->elementType);
315}
316
317const struct ng_parse_type ng_parse_array_type = {
318 NULL,
319 NULL,
320 NULL,
321 ng_array_parse,
322 ng_array_unparse,
323 ng_array_getDefault,
324 ng_array_getAlign
325};
326
327/************************************************************************
328 INT8 TYPE
329 ************************************************************************/
330
331static int
332ng_int8_parse(const struct ng_parse_type *type,
333 const char *s, int *off, const u_char *const start,
334 u_char *const buf, int *buflen)
335{
336 long val;
337 int8_t val8;
338 char *eptr;
339
340 val = strtol(s + *off, &eptr, 0);
341 if (val < (int8_t)0x80 || val > (u_int8_t)0xff || eptr == s + *off)
342 return (EINVAL);
343 *off = eptr - s;
344 val8 = (int8_t)val;
345 bcopy(&val8, buf, sizeof(int8_t));
346 *buflen = sizeof(int8_t);
347 return (0);
348}
349
350static int
351ng_int8_unparse(const struct ng_parse_type *type,
352 const u_char *data, int *off, char *cbuf, int cbuflen)
353{
354 const char *fmt;
355 int fval;
356 int8_t val;
357
358 bcopy(data + *off, &val, sizeof(int8_t));
973c11b9 359 switch ((int)(intptr_t)type->info) {
984263bc
MD		 360 case INT_SIGNED:
361 fmt = "%d";
362 fval = val;
363 break;
364 case INT_UNSIGNED:
365 fmt = "%u";
366 fval = (u_int8_t)val;
367 break;
368 case INT_HEX:
369 fmt = "0x%x";
370 fval = (u_int8_t)val;
371 break;
372 default:
9eb57b71 373 panic("%s: unknown type", __func__);
984263bc
MD		 374 }
375 NG_PARSE_APPEND(fmt, fval);
376 *off += sizeof(int8_t);
377 return (0);
378}
379
380static int
381ng_int8_getDefault(const struct ng_parse_type *type,
382 const u_char *const start, u_char *buf, int *buflen)
383{
384 int8_t val;
385
386 if (*buflen < sizeof(int8_t))
387 return (ERANGE);
388 val = 0;
389 bcopy(&val, buf, sizeof(int8_t));
390 *buflen = sizeof(int8_t);
391 return (0);
392}
393
394static int
395ng_int8_getAlign(const struct ng_parse_type *type)
396{
397 return INT8_ALIGNMENT;
398}
399
400const struct ng_parse_type ng_parse_int8_type = {
401 NULL,
402 (void *)INT_SIGNED,
403 NULL,
404 ng_int8_parse,
405 ng_int8_unparse,
406 ng_int8_getDefault,
407 ng_int8_getAlign
408};
409
410const struct ng_parse_type ng_parse_uint8_type = {
411 &ng_parse_int8_type,
412 (void *)INT_UNSIGNED
413};
414
415const struct ng_parse_type ng_parse_hint8_type = {
416 &ng_parse_int8_type,
417 (void *)INT_HEX
418};
419
420/************************************************************************
421 INT16 TYPE
422 ************************************************************************/
423
424static int
425ng_int16_parse(const struct ng_parse_type *type,
426 const char *s, int *off, const u_char *const start,
427 u_char *const buf, int *buflen)
428{
429 long val;
430 int16_t val16;
431 char *eptr;
432
433 val = strtol(s + *off, &eptr, 0);
434 if (val < (int16_t)0x8000
435 || val > (u_int16_t)0xffff || eptr == s + *off)
436 return (EINVAL);
437 *off = eptr - s;
438 val16 = (int16_t)val;
439 bcopy(&val16, buf, sizeof(int16_t));
440 *buflen = sizeof(int16_t);
441 return (0);
442}
443
444static int
445ng_int16_unparse(const struct ng_parse_type *type,
446 const u_char *data, int *off, char *cbuf, int cbuflen)
447{
448 const char *fmt;
449 int fval;
450 int16_t val;
451
452 bcopy(data + *off, &val, sizeof(int16_t));
973c11b9 453 switch ((int)(intptr_t)type->info) {
984263bc
MD		 454 case INT_SIGNED:
455 fmt = "%d";
456 fval = val;
457 break;
458 case INT_UNSIGNED:
459 fmt = "%u";
460 fval = (u_int16_t)val;
461 break;
462 case INT_HEX:
463 fmt = "0x%x";
464 fval = (u_int16_t)val;
465 break;
466 default:
9eb57b71 467 panic("%s: unknown type", __func__);
984263bc
MD		 468 }
469 NG_PARSE_APPEND(fmt, fval);
470 *off += sizeof(int16_t);
471 return (0);
472}
473
474static int
475ng_int16_getDefault(const struct ng_parse_type *type,
476 const u_char *const start, u_char *buf, int *buflen)
477{
478 int16_t val;
479
480 if (*buflen < sizeof(int16_t))
481 return (ERANGE);
482 val = 0;
483 bcopy(&val, buf, sizeof(int16_t));
484 *buflen = sizeof(int16_t);
485 return (0);
486}
487
488static int
489ng_int16_getAlign(const struct ng_parse_type *type)
490{
491 return INT16_ALIGNMENT;
492}
493
494const struct ng_parse_type ng_parse_int16_type = {
495 NULL,
496 (void *)INT_SIGNED,
497 NULL,
498 ng_int16_parse,
499 ng_int16_unparse,
500 ng_int16_getDefault,
501 ng_int16_getAlign
502};
503
504const struct ng_parse_type ng_parse_uint16_type = {
505 &ng_parse_int16_type,
506 (void *)INT_UNSIGNED
507};
508
509const struct ng_parse_type ng_parse_hint16_type = {
510 &ng_parse_int16_type,
511 (void *)INT_HEX
512};
513
514/************************************************************************
515 INT32 TYPE
516 ************************************************************************/
517
518static int
519ng_int32_parse(const struct ng_parse_type *type,
520 const char *s, int *off, const u_char *const start,
521 u_char *const buf, int *buflen)
522{
523 long val; /* assumes long is at least 32 bits */
524 int32_t val32;
525 char *eptr;
526
527 val = strtol(s + *off, &eptr, 0);
528 if (val < (int32_t)0x80000000
529 || val > (u_int32_t)0xffffffff || eptr == s + *off)
530 return (EINVAL);
531 *off = eptr - s;
532 val32 = (int32_t)val;
533 bcopy(&val32, buf, sizeof(int32_t));
534 *buflen = sizeof(int32_t);
535 return (0);
536}
537
538static int
539ng_int32_unparse(const struct ng_parse_type *type,
540 const u_char *data, int *off, char *cbuf, int cbuflen)
541{
542 const char *fmt;
543 long fval;
544 int32_t val;
545
546 bcopy(data + *off, &val, sizeof(int32_t));
973c11b9 547 switch ((int)(intptr_t)type->info) {
984263bc
MD		 548 case INT_SIGNED:
549 fmt = "%ld";
550 fval = val;
551 break;
552 case INT_UNSIGNED:
553 fmt = "%lu";
554 fval = (u_int32_t)val;
555 break;
556 case INT_HEX:
557 fmt = "0x%lx";
558 fval = (u_int32_t)val;
559 break;
560 default:
9eb57b71 561 panic("%s: unknown type", __func__);
984263bc
MD		 562 }
563 NG_PARSE_APPEND(fmt, fval);
564 *off += sizeof(int32_t);
565 return (0);
566}
567
568static int
569ng_int32_getDefault(const struct ng_parse_type *type,
570 const u_char *const start, u_char *buf, int *buflen)
571{
572 int32_t val;
573
574 if (*buflen < sizeof(int32_t))
575 return (ERANGE);
576 val = 0;
577 bcopy(&val, buf, sizeof(int32_t));
578 *buflen = sizeof(int32_t);
579 return (0);
580}
581
582static int
583ng_int32_getAlign(const struct ng_parse_type *type)
584{
585 return INT32_ALIGNMENT;
586}
587
588const struct ng_parse_type ng_parse_int32_type = {
589 NULL,
590 (void *)INT_SIGNED,
591 NULL,
592 ng_int32_parse,
593 ng_int32_unparse,
594 ng_int32_getDefault,
595 ng_int32_getAlign
596};
597
598const struct ng_parse_type ng_parse_uint32_type = {
599 &ng_parse_int32_type,
600 (void *)INT_UNSIGNED
601};
602
603const struct ng_parse_type ng_parse_hint32_type = {
604 &ng_parse_int32_type,
605 (void *)INT_HEX
606};
607
608/************************************************************************
609 INT64 TYPE
610 ************************************************************************/
611
612static int
613ng_int64_parse(const struct ng_parse_type *type,
614 const char *s, int *off, const u_char *const start,
615 u_char *const buf, int *buflen)
616{
617 quad_t val;
618 int64_t val64;
619 char *eptr;
620
621 val = strtoq(s + *off, &eptr, 0);
622 if (eptr == s + *off)
623 return (EINVAL);
624 *off = eptr - s;
625 val64 = (int64_t)val;
626 bcopy(&val64, buf, sizeof(int64_t));
627 *buflen = sizeof(int64_t);
628 return (0);
629}
630
631static int
632ng_int64_unparse(const struct ng_parse_type *type,
633 const u_char *data, int *off, char *cbuf, int cbuflen)
634{
635 const char *fmt;
636 long long fval;
637 int64_t val;
638
639 bcopy(data + *off, &val, sizeof(int64_t));
973c11b9 640 switch ((int)(intptr_t)type->info) {
984263bc
MD		 641 case INT_SIGNED:
642 fmt = "%lld";
643 fval = val;
644 break;
645 case INT_UNSIGNED:
646 fmt = "%llu";
647 fval = (u_int64_t)val;
648 break;
649 case INT_HEX:
650 fmt = "0x%llx";
651 fval = (u_int64_t)val;
652 break;
653 default:
9eb57b71 654 panic("%s: unknown type", __func__);
984263bc
MD		 655 }
656 NG_PARSE_APPEND(fmt, fval);
657 *off += sizeof(int64_t);
658 return (0);
659}
660
661static int
662ng_int64_getDefault(const struct ng_parse_type *type,
663 const u_char *const start, u_char *buf, int *buflen)
664{
665 int64_t val;
666
667 if (*buflen < sizeof(int64_t))
668 return (ERANGE);
669 val = 0;
670 bcopy(&val, buf, sizeof(int64_t));
671 *buflen = sizeof(int64_t);
672 return (0);
673}
674
675static int
676ng_int64_getAlign(const struct ng_parse_type *type)
677{
678 return INT64_ALIGNMENT;
679}
680
681const struct ng_parse_type ng_parse_int64_type = {
682 NULL,
683 (void *)INT_SIGNED,
684 NULL,
685 ng_int64_parse,
686 ng_int64_unparse,
687 ng_int64_getDefault,
688 ng_int64_getAlign
689};
690
691const struct ng_parse_type ng_parse_uint64_type = {
692 &ng_parse_int64_type,
693 (void *)INT_UNSIGNED
694};
695
696const struct ng_parse_type ng_parse_hint64_type = {
697 &ng_parse_int64_type,
698 (void *)INT_HEX
699};
700
701/************************************************************************
702 STRING TYPE
703 ************************************************************************/
704
705static int
706ng_string_parse(const struct ng_parse_type *type,
707 const char *s, int *off, const u_char *const start,
708 u_char *const buf, int *buflen)
709{
710 char *sval;
711 int len;
712
713 if ((sval = ng_get_string_token(s, off, &len)) == NULL)
714 return (EINVAL);
715 *off += len;
716 len = strlen(sval) + 1;
717 bcopy(sval, buf, len);
718 FREE(sval, M_NETGRAPH);
719 *buflen = len;
720 return (0);
721}
722
723static int
724ng_string_unparse(const struct ng_parse_type *type,
725 const u_char *data, int *off, char *cbuf, int cbuflen)
726{
727 const char *const raw = (const char *)data + *off;
728 char *const s = ng_encode_string(raw);
729
730 if (s == NULL)
731 return (ENOMEM);
732 NG_PARSE_APPEND("%s", s);
733 *off += strlen(raw) + 1;
734 FREE(s, M_NETGRAPH);
735 return (0);
736}
737
738static int
739ng_string_getDefault(const struct ng_parse_type *type,
740 const u_char *const start, u_char *buf, int *buflen)
741{
742
743 if (*buflen < 1)
744 return (ERANGE);
745 buf[0] = (u_char)'\0';
746 *buflen = 1;
747 return (0);
748}
749
750const struct ng_parse_type ng_parse_string_type = {
751 NULL,
752 NULL,
753 NULL,
754 ng_string_parse,
755 ng_string_unparse,
756 ng_string_getDefault,
757 NULL
758};
759
760/************************************************************************
761 FIXED BUFFER STRING TYPE
762 ************************************************************************/
763
764static int
765ng_fixedstring_parse(const struct ng_parse_type *type,
766 const char *s, int *off, const u_char *const start,
767 u_char *const buf, int *buflen)
768{
769 const struct ng_parse_fixedstring_info *const fi = type->info;
770 char *sval;
771 int len;
772
773 if ((sval = ng_get_string_token(s, off, &len)) == NULL)
774 return (EINVAL);
775 if (strlen(sval) + 1 > fi->bufSize)
776 return (E2BIG);
777 *off += len;
778 len = strlen(sval) + 1;
779 bcopy(sval, buf, len);
780 FREE(sval, M_NETGRAPH);
781 bzero(buf + len, fi->bufSize - len);
782 *buflen = fi->bufSize;
783 return (0);
784}
785
786static int
787ng_fixedstring_unparse(const struct ng_parse_type *type,
788 const u_char *data, int *off, char *cbuf, int cbuflen)
789{
790 const struct ng_parse_fixedstring_info *const fi = type->info;
791 int error, temp = *off;
792
793 if ((error = ng_string_unparse(type, data, &temp, cbuf, cbuflen)) != 0)
794 return (error);
795 *off += fi->bufSize;
796 return (0);
797}
798
799static int
800ng_fixedstring_getDefault(const struct ng_parse_type *type,
801 const u_char *const start, u_char *buf, int *buflen)
802{
803 const struct ng_parse_fixedstring_info *const fi = type->info;
804
805 if (*buflen < fi->bufSize)
806 return (ERANGE);
807 bzero(buf, fi->bufSize);
808 *buflen = fi->bufSize;
809 return (0);
810}
811
812const struct ng_parse_type ng_parse_fixedstring_type = {
813 NULL,
814 NULL,
815 NULL,
816 ng_fixedstring_parse,
817 ng_fixedstring_unparse,
818 ng_fixedstring_getDefault,
819 NULL
820};
821
822const struct ng_parse_fixedstring_info ng_parse_nodebuf_info = {
f15ba1a8 823 NG_NODESIZ
984263bc
MD		 824};
825const struct ng_parse_type ng_parse_nodebuf_type = {
826 &ng_parse_fixedstring_type,
827 &ng_parse_nodebuf_info
828};
829
830const struct ng_parse_fixedstring_info ng_parse_hookbuf_info = {
f15ba1a8 831 NG_HOOKSIZ
984263bc
MD		 832};
833const struct ng_parse_type ng_parse_hookbuf_type = {
834 &ng_parse_fixedstring_type,
835 &ng_parse_hookbuf_info
836};
837
838const struct ng_parse_fixedstring_info ng_parse_pathbuf_info = {
f15ba1a8 839 NG_PATHSIZ
984263bc
MD		 840};
841const struct ng_parse_type ng_parse_pathbuf_type = {
842 &ng_parse_fixedstring_type,
843 &ng_parse_pathbuf_info
844};
845
846const struct ng_parse_fixedstring_info ng_parse_typebuf_info = {
f15ba1a8 847 NG_TYPESIZ
984263bc
MD		 848};
849const struct ng_parse_type ng_parse_typebuf_type = {
850 &ng_parse_fixedstring_type,
851 &ng_parse_typebuf_info
852};
853
854const struct ng_parse_fixedstring_info ng_parse_cmdbuf_info = {
f15ba1a8 855 NG_CMDSTRSIZ
984263bc
MD		 856};
857const struct ng_parse_type ng_parse_cmdbuf_type = {
858 &ng_parse_fixedstring_type,
859 &ng_parse_cmdbuf_info
860};
861
862/************************************************************************
863 IP ADDRESS TYPE
864 ************************************************************************/
865
866static int
867ng_ipaddr_parse(const struct ng_parse_type *type,
868 const char *s, int *off, const u_char *const start,
869 u_char *const buf, int *buflen)
870{
871 int i, error;
872
873 for (i = 0; i < 4; i++) {
874 if ((error = ng_int8_parse(&ng_parse_int8_type,
875 s, off, start, buf + i, buflen)) != 0)
876 return (error);
877 if (i < 3 && s[*off] != '.')
878 return (EINVAL);
879 (*off)++;
880 }
881 *buflen = 4;
882 return (0);
883}
884
885static int
886ng_ipaddr_unparse(const struct ng_parse_type *type,
887 const u_char *data, int *off, char *cbuf, int cbuflen)
888{
889 struct in_addr ip;
890
891 bcopy(data + *off, &ip, sizeof(ip));
892 NG_PARSE_APPEND("%d.%d.%d.%d", ((u_char *)&ip)[0],
893 ((u_char *)&ip)[1], ((u_char *)&ip)[2], ((u_char *)&ip)[3]);
894 *off += sizeof(ip);
895 return (0);
896}
897
898static int
899ng_ipaddr_getDefault(const struct ng_parse_type *type,
900 const u_char *const start, u_char *buf, int *buflen)
901{
902 struct in_addr ip = { 0 };
903
904 if (*buflen < sizeof(ip))
905 return (ERANGE);
906 bcopy(&ip, buf, sizeof(ip));
907 *buflen = sizeof(ip);
908 return (0);
909}
910
911const struct ng_parse_type ng_parse_ipaddr_type = {
912 NULL,
913 NULL,
914 NULL,
915 ng_ipaddr_parse,
916 ng_ipaddr_unparse,
917 ng_ipaddr_getDefault,
918 ng_int32_getAlign
919};
920
921/************************************************************************
922 BYTE ARRAY TYPE
923 ************************************************************************/
924
925/* Get the length of a byte array */
926static int
927ng_parse_bytearray_subtype_getLength(const struct ng_parse_type *type,
928 const u_char *start, const u_char *buf)
929{
930 ng_parse_array_getLength_t *const getLength = type->private;
931
932 return (*getLength)(type, start, buf);
933}
934
935/* Byte array element type is hex int8 */
936static const struct ng_parse_array_info ng_parse_bytearray_subtype_info = {
937 &ng_parse_hint8_type,
938 &ng_parse_bytearray_subtype_getLength,
939 NULL
940};
941static const struct ng_parse_type ng_parse_bytearray_subtype = {
942 &ng_parse_array_type,
943 &ng_parse_bytearray_subtype_info
944};
945
946static int
947ng_bytearray_parse(const struct ng_parse_type *type,
948 const char *s, int *off, const u_char *const start,
949 u_char *const buf, int *buflen)
950{
951 char *str;
952 int toklen;
953
954 /* We accept either an array of bytes or a string constant */
955 if ((str = ng_get_string_token(s, off, &toklen)) != NULL) {
956 ng_parse_array_getLength_t *const getLength = type->info;
957 int arraylen, slen;
958
959 arraylen = (*getLength)(type, start, buf);
960 if (arraylen > *buflen) {
961 FREE(str, M_NETGRAPH);
962 return (ERANGE);
963 }
964 slen = strlen(str) + 1;
965 if (slen > arraylen) {
966 FREE(str, M_NETGRAPH);
967 return (E2BIG);
968 }
969 bcopy(str, buf, slen);
970 bzero(buf + slen, arraylen - slen);
971 FREE(str, M_NETGRAPH);
972 *off += toklen;
973 *buflen = arraylen;
974 return (0);
975 } else {
976 struct ng_parse_type subtype;
977
978 subtype = ng_parse_bytearray_subtype;
55f2596a 979 *(const void **)&subtype.private = type->info;
984263bc
MD		 980 return ng_array_parse(&subtype, s, off, start, buf, buflen);
981 }
982}
983
984static int
985ng_bytearray_unparse(const struct ng_parse_type *type,
986 const u_char *data, int *off, char *cbuf, int cbuflen)
987{
988 struct ng_parse_type subtype;
989
990 subtype = ng_parse_bytearray_subtype;
55f2596a 991 *(const void **)&subtype.private = type->info;
984263bc
MD		 992 return ng_array_unparse(&subtype, data, off, cbuf, cbuflen);
993}
994
995static int
996ng_bytearray_getDefault(const struct ng_parse_type *type,
997 const u_char *const start, u_char *buf, int *buflen)
998{
999 struct ng_parse_type subtype;
1000
1001 subtype = ng_parse_bytearray_subtype;
55f2596a 1002 *(const void **)&subtype.private = type->info;
984263bc
MD		 1003 return ng_array_getDefault(&subtype, start, buf, buflen);
1004}
1005
1006const struct ng_parse_type ng_parse_bytearray_type = {
1007 NULL,
1008 NULL,
1009 NULL,
1010 ng_bytearray_parse,
1011 ng_bytearray_unparse,
1012 ng_bytearray_getDefault,
1013 NULL
1014};
1015
1016/************************************************************************
1017 STRUCT NG_MESG TYPE
1018 ************************************************************************/
1019
1020/* Get msg->header.arglen when "buf" is pointing to msg->data */
1021static int
1022ng_parse_ng_mesg_getLength(const struct ng_parse_type *type,
1023 const u_char *start, const u_char *buf)
1024{
1025 const struct ng_mesg *msg;
1026
1027 msg = (const struct ng_mesg *)(buf - sizeof(*msg));
1028 return msg->header.arglen;
1029}
1030
1031/* Type for the variable length data portion of a struct ng_mesg */
1032static const struct ng_parse_type ng_msg_data_type = {
1033 &ng_parse_bytearray_type,
1034 &ng_parse_ng_mesg_getLength
1035};
1036
1037/* Type for the entire struct ng_mesg header with data section */
1038static const struct ng_parse_struct_field ng_parse_ng_mesg_type_fields[]
1039 = NG_GENERIC_NG_MESG_INFO(&ng_msg_data_type);
1040const struct ng_parse_type ng_parse_ng_mesg_type = {
1041 &ng_parse_struct_type,
1042 &ng_parse_ng_mesg_type_fields,
1043};
1044
1045/************************************************************************
1046 COMPOSITE HELPER ROUTINES
1047 ************************************************************************/
1048
1049/*
1050 * Convert a structure or array from ASCII to binary
1051 */
1052static int
1053ng_parse_composite(const struct ng_parse_type *type, const char *s,
1054 int *off, const u_char *const start, u_char *const buf, int *buflen,
1055 const enum comptype ctype)
1056{
1057 const int num = ng_get_composite_len(type, start, buf, ctype);
1058 int nextIndex = 0; /* next implicit array index */
1059 u_int index; /* field or element index */
1060 int *foff; /* field value offsets in string */
1061 int align, len, blen, error = 0;
1062
1063 /* Initialize */
e7b4468c 1064 MALLOC(foff, int *, num * sizeof(*foff), M_NETGRAPH, M_NOWAIT | M_ZERO);
984263bc
MD		 1065 if (foff == NULL) {
1066 error = ENOMEM;
1067 goto done;
1068 }
984263bc
MD		 1069
1070 /* Get opening brace/bracket */
1071 if (ng_parse_get_token(s, off, &len)
1072 != (ctype == CT_STRUCT ? T_LBRACE : T_LBRACKET)) {
1073 error = EINVAL;
1074 goto done;
1075 }
1076 *off += len;
1077
1078 /* Get individual element value positions in the string */
1079 for (;;) {
1080 enum ng_parse_token tok;
1081
1082 /* Check for closing brace/bracket */
1083 tok = ng_parse_get_token(s, off, &len);
1084 if (tok == (ctype == CT_STRUCT ? T_RBRACE : T_RBRACKET)) {
1085 *off += len;
1086 break;
1087 }
1088
1089 /* For arrays, the 'name' (ie, index) is optional, so
1090 distinguish name from values by seeing if the next
1091 token is an equals sign */
1092 if (ctype != CT_STRUCT) {
1093 int len2, off2;
1094 char *eptr;
1095
1096 /* If an opening brace/bracket, index is implied */
1097 if (tok == T_LBRACE || tok == T_LBRACKET) {
1098 index = nextIndex++;
1099 goto gotIndex;
1100 }
1101
1102 /* Might be an index, might be a value, either way... */
1103 if (tok != T_WORD) {
1104 error = EINVAL;
1105 goto done;
1106 }
1107
1108 /* If no equals sign follows, index is implied */
1109 off2 = *off + len;
1110 if (ng_parse_get_token(s, &off2, &len2) != T_EQUALS) {
1111 index = nextIndex++;
1112 goto gotIndex;
1113 }
1114
1115 /* Index was specified explicitly; parse it */
1116 index = (u_int)strtoul(s + *off, &eptr, 0);
1117 if (index < 0 || eptr - (s + *off) != len) {
1118 error = EINVAL;
1119 goto done;
1120 }
1121 nextIndex = index + 1;
1122 *off += len + len2;
1123gotIndex:
6b08710e 1124 ; /* avoid gcc3.x warning */
984263bc
MD		 1125 } else { /* a structure field */
1126 const struct ng_parse_struct_field *const
1127 fields = type->info;
1128
1129 /* Find the field by name (required) in field list */
1130 if (tok != T_WORD) {
1131 error = EINVAL;
1132 goto done;
1133 }
1134 for (index = 0; index < num; index++) {
1135 const struct ng_parse_struct_field *const
1136 field = &fields[index];
1137
1138 if (strncmp(&s[*off], field->name, len) == 0
1139 && field->name[len] == '\0')
1140 break;
1141 }
1142 if (index == num) {
1143 error = ENOENT;
1144 goto done;
1145 }
1146 *off += len;
1147
1148 /* Get equals sign */
1149 if (ng_parse_get_token(s, off, &len) != T_EQUALS) {
1150 error = EINVAL;
1151 goto done;
1152 }
1153 *off += len;
1154 }
1155
1156 /* Check array index */
1157 if (index >= num) {
1158 error = E2BIG;
1159 goto done;
1160 }
1161
1162 /* Save value's position and skip over it for now */
1163 if (foff[index] != 0) {
1164 error = EALREADY; /* duplicate */
1165 goto done;
1166 }
1167 while (isspace(s[*off]))
1168 (*off)++;
1169 foff[index] = *off;
1170 if ((error = ng_parse_skip_value(s, *off, &len)) != 0)
1171 goto done;
1172 *off += len;
1173 }
1174
1175 /* Now build binary structure from supplied values and defaults */
1176 for (blen = index = 0; index < num; index++) {
1177 const struct ng_parse_type *const
1178 etype = ng_get_composite_etype(type, index, ctype);
1179 int k, pad, vlen;
1180
1181 /* Zero-pad any alignment bytes */
1182 pad = ng_parse_get_elem_pad(type, index, ctype, blen);
1183 for (k = 0; k < pad; k++) {
1184 if (blen >= *buflen) {
1185 error = ERANGE;
1186 goto done;
1187 }
1188 buf[blen++] = 0;
1189 }
1190
1191 /* Get value */
1192 vlen = *buflen - blen;
1193 if (foff[index] == 0) { /* use default value */
1194 error = ng_get_composite_elem_default(type, index,
1195 start, buf + blen, &vlen, ctype);
1196 } else { /* parse given value */
1197 *off = foff[index];
1198 error = INVOKE(etype, parse)(etype,
1199 s, off, start, buf + blen, &vlen);
1200 }
1201 if (error != 0)
1202 goto done;
1203 blen += vlen;
1204 }
1205
1206 /* Make total composite structure size a multiple of its alignment */
1207 if ((align = ALIGNMENT(type)) != 0) {
1208 while (blen % align != 0) {
1209 if (blen >= *buflen) {
1210 error = ERANGE;
1211 goto done;
1212 }
1213 buf[blen++] = 0;
1214 }
1215 }
1216
1217 /* Done */
1218 *buflen = blen;
1219done:
1220 if (foff != NULL)
1221 FREE(foff, M_NETGRAPH);
1222 return (error);
1223}
1224
1225/*
1226 * Convert an array or structure from binary to ASCII
1227 */
1228static int
1229ng_unparse_composite(const struct ng_parse_type *type, const u_char *data,
1230 int *off, char *cbuf, int cbuflen, const enum comptype ctype)
1231{
1232 const struct ng_mesg *const hdr
1233 = (const struct ng_mesg *)(data - sizeof(*hdr));
1234 const int num = ng_get_composite_len(type, data, data + *off, ctype);
1235 const int workSize = 20 * 1024; /* XXX hard coded constant */
1236 int nextIndex = 0, didOne = 0;
1237 int error, index;
1238 u_char *workBuf;
1239
1240 /* Get workspace for checking default values */
1241 MALLOC(workBuf, u_char *, workSize, M_NETGRAPH, M_NOWAIT);
1242 if (workBuf == NULL)
1243 return (ENOMEM);
1244
1245 /* Opening brace/bracket */
1246 NG_PARSE_APPEND("%c", (ctype == CT_STRUCT) ? '{' : '[');
1247
1248 /* Do each item */
1249 for (index = 0; index < num; index++) {
1250 const struct ng_parse_type *const
1251 etype = ng_get_composite_etype(type, index, ctype);
1252
1253 /* Skip any alignment pad bytes */
1254 *off += ng_parse_get_elem_pad(type, index, ctype, *off);
1255
1256 /*
1257 * See if element is equal to its default value; skip if so.
1258 * Copy struct ng_mesg header for types that peek into it.
1259 */
1260 if (sizeof(*hdr) + *off < workSize) {
1261 int tempsize = workSize - sizeof(*hdr) - *off;
1262
1263 bcopy(hdr, workBuf, sizeof(*hdr) + *off);
1264 if (ng_get_composite_elem_default(type, index, workBuf
1265 + sizeof(*hdr), workBuf + sizeof(*hdr) + *off,
1266 &tempsize, ctype) == 0
1267 && bcmp(workBuf + sizeof(*hdr) + *off,
1268 data + *off, tempsize) == 0) {
1269 *off += tempsize;
1270 continue;
1271 }
1272 }
1273
1274 /* Print name= */
1275 NG_PARSE_APPEND(" ");
1276 if (ctype != CT_STRUCT) {
1277 if (index != nextIndex) {
1278 nextIndex = index;
1279 NG_PARSE_APPEND("%d=", index);
1280 }
1281 nextIndex++;
1282 } else {
1283 const struct ng_parse_struct_field *const
1284 fields = type->info;
1285
1286 NG_PARSE_APPEND("%s=", fields[index].name);
1287 }
1288
1289 /* Print value */
1290 if ((error = INVOKE(etype, unparse)
1291 (etype, data, off, cbuf, cbuflen)) != 0) {
1292 FREE(workBuf, M_NETGRAPH);
1293 return (error);
1294 }
1295 cbuflen -= strlen(cbuf);
1296 cbuf += strlen(cbuf);
1297 didOne = 1;
1298 }
1299 FREE(workBuf, M_NETGRAPH);
1300
1301 /* Closing brace/bracket */
1302 NG_PARSE_APPEND("%s%c",
1303 didOne ? " " : "", (ctype == CT_STRUCT) ? '}' : ']');
1304 return (0);
1305}
1306
1307/*
1308 * Generate the default value for an element of an array or structure
1309 * Returns EOPNOTSUPP if default value is unspecified.
1310 */
1311static int
1312ng_get_composite_elem_default(const struct ng_parse_type *type,
1313 int index, const u_char *const start, u_char *buf, int *buflen,
1314 const enum comptype ctype)
1315{
1316 const struct ng_parse_type *etype;
1317 ng_getDefault_t *func;
1318
1319 switch (ctype) {
1320 case CT_STRUCT:
1321 break;
1322 case CT_ARRAY:
1323 {
1324 const struct ng_parse_array_info *const ai = type->info;
1325
1326 if (ai->getDefault != NULL) {
1327 return (*ai->getDefault)(type,
1328 index, start, buf, buflen);
1329 }
1330 break;
1331 }
1332 case CT_FIXEDARRAY:
1333 {
1334 const struct ng_parse_fixedarray_info *const fi = type->info;
1335
1336 if (*fi->getDefault != NULL) {
1337 return (*fi->getDefault)(type,
1338 index, start, buf, buflen);
1339 }
1340 break;
1341 }
1342 default:
9eb57b71 1343 panic("%s", __func__);
984263bc
MD		 1344 }
1345
1346 /* Default to element type default */
1347 etype = ng_get_composite_etype(type, index, ctype);
1348 func = METHOD(etype, getDefault);
1349 if (func == NULL)
1350 return (EOPNOTSUPP);
1351 return (*func)(etype, start, buf, buflen);
1352}
1353
1354/*
1355 * Get the number of elements in a struct, variable or fixed array.
1356 */
1357static int
1358ng_get_composite_len(const struct ng_parse_type *type,
1359 const u_char *const start, const u_char *buf,
1360 const enum comptype ctype)
1361{
1362 switch (ctype) {
1363 case CT_STRUCT:
1364 {
1365 const struct ng_parse_struct_field *const fields = type->info;
1366 int numFields = 0;
1367
1368 for (numFields = 0; ; numFields++) {
1369 const struct ng_parse_struct_field *const
1370 fi = &fields[numFields];
1371
1372 if (fi->name == NULL)
1373 break;
1374 }
1375 return (numFields);
1376 }
1377 case CT_ARRAY:
1378 {
1379 const struct ng_parse_array_info *const ai = type->info;
1380
1381 return (*ai->getLength)(type, start, buf);
1382 }
1383 case CT_FIXEDARRAY:
1384 {
1385 const struct ng_parse_fixedarray_info *const fi = type->info;
1386
1387 return fi->length;
1388 }
1389 default:
9eb57b71 1390 panic("%s", __func__);
984263bc
MD		 1391 }
1392 return (0);
1393}
1394
1395/*
1396 * Return the type of the index'th element of a composite structure
1397 */
1398static const struct ng_parse_type *
1399ng_get_composite_etype(const struct ng_parse_type *type,
1400 int index, const enum comptype ctype)
1401{
1402 const struct ng_parse_type *etype = NULL;
1403
1404 switch (ctype) {
1405 case CT_STRUCT:
1406 {
1407 const struct ng_parse_struct_field *const fields = type->info;
1408
1409 etype = fields[index].type;
1410 break;
1411 }
1412 case CT_ARRAY:
1413 {
1414 const struct ng_parse_array_info *const ai = type->info;
1415
1416 etype = ai->elementType;
1417 break;
1418 }
1419 case CT_FIXEDARRAY:
1420 {
1421 const struct ng_parse_fixedarray_info *const fi = type->info;
1422
1423 etype = fi->elementType;
1424 break;
1425 }
1426 default:
9eb57b71 1427 panic("%s", __func__);
984263bc
MD		 1428 }
1429 return (etype);
1430}
1431
1432/*
1433 * Get the number of bytes to skip to align for the next
1434 * element in a composite structure.
1435 */
1436static int
1437ng_parse_get_elem_pad(const struct ng_parse_type *type,
1438 int index, enum comptype ctype, int posn)
1439{
1440 const struct ng_parse_type *const
1441 etype = ng_get_composite_etype(type, index, ctype);
1442 int align;
1443
1444 /* Get element's alignment, and possibly override */
1445 align = ALIGNMENT(etype);
1446 if (ctype == CT_STRUCT) {
1447 const struct ng_parse_struct_field *const fields = type->info;
1448
1449 if (fields[index].alignment != 0)
1450 align = fields[index].alignment;
1451 }
1452
1453 /* Return number of bytes to skip to align */
1454 return (align ? (align - (posn % align)) % align : 0);
1455}
1456
1457/************************************************************************
1458 PARSING HELPER ROUTINES
1459 ************************************************************************/
1460
1461/*
1462 * Skip over a value
1463 */
1464static int
1465ng_parse_skip_value(const char *s, int off0, int *lenp)
1466{
1467 int len, nbracket, nbrace;
1468 int off = off0;
1469
1470 len = nbracket = nbrace = 0;
1471 do {
1472 switch (ng_parse_get_token(s, &off, &len)) {
1473 case T_LBRACKET:
1474 nbracket++;
1475 break;
1476 case T_LBRACE:
1477 nbrace++;
1478 break;
1479 case T_RBRACKET:
1480 if (nbracket-- == 0)
1481 return (EINVAL);
1482 break;
1483 case T_RBRACE:
1484 if (nbrace-- == 0)
1485 return (EINVAL);
1486 break;
1487 case T_EOF:
1488 return (EINVAL);
1489 default:
1490 break;
1491 }
1492 off += len;
1493 } while (nbracket > 0 || nbrace > 0);
1494 *lenp = off - off0;
1495 return (0);
1496}
1497
1498/*
1499 * Find the next token in the string, starting at offset *startp.
1500 * Returns the token type, with *startp pointing to the first char
1501 * and *lenp the length.
1502 */
1503enum ng_parse_token
1504ng_parse_get_token(const char *s, int *startp, int *lenp)
1505{
1506 char *t;
1507 int i;
1508
1509 while (isspace(s[*startp]))
1510 (*startp)++;
1511 switch (s[*startp]) {
1512 case '\0':
1513 *lenp = 0;
1514 return T_EOF;
1515 case '{':
1516 *lenp = 1;
1517 return T_LBRACE;
1518 case '}':
1519 *lenp = 1;
1520 return T_RBRACE;
1521 case '[':
1522 *lenp = 1;
1523 return T_LBRACKET;
1524 case ']':
1525 *lenp = 1;
1526 return T_RBRACKET;
1527 case '=':
1528 *lenp = 1;
1529 return T_EQUALS;
1530 case '"':
1531 if ((t = ng_get_string_token(s, startp, lenp)) == NULL)
1532 return T_ERROR;
1533 FREE(t, M_NETGRAPH);
1534 return T_STRING;
1535 default:
1536 for (i = *startp + 1; s[i] != '\0' && !isspace(s[i])
1537 && s[i] != '{' && s[i] != '}' && s[i] != '['
1538 && s[i] != ']' && s[i] != '=' && s[i] != '"'; i++)
1539 ;
1540 *lenp = i - *startp;
1541 return T_WORD;
1542 }
1543}
1544
1545/*
1546 * Get a string token, which must be enclosed in double quotes.
1547 * The normal C backslash escapes are recognized.
1548 */
1549char *
1550ng_get_string_token(const char *s, int *startp, int *lenp)
1551{
1552 char *cbuf, *p;
1553 int start, off;
1554
1555 while (isspace(s[*startp]))
1556 (*startp)++;
1557 start = *startp;
1558 if (s[*startp] != '"')
1559 return (NULL);
1560 MALLOC(cbuf, char *, strlen(s + start), M_NETGRAPH, M_NOWAIT);
1561 if (cbuf == NULL)
1562 return (NULL);
1563 strcpy(cbuf, s + start + 1);
1564 for (off = 1, p = cbuf; *p != '\0'; off++, p++) {
1565 if (*p == '"') {
1566 *p = '\0';
1567 *lenp = off + 1;
1568 return (cbuf);
1569 } else if (p[0] == '\\' && p[1] != '\0') {
1570 int x, k;
1571 char *v;
1572
1573 strcpy(p, p + 1);
1574 v = p;
1575 switch (*p) {
1576 case 't':
1577 *v = '\t';
1578 off++;
1579 continue;
1580 case 'n':
1581 *v = '\n';
1582 off++;
1583 continue;
1584 case 'r':
1585 *v = '\r';
1586 off++;
1587 continue;
1588 case 'v':
1589 *v = '\v';
1590 off++;
1591 continue;
1592 case 'f':
1593 *v = '\f';
1594 off++;
1595 continue;
1596 case '"':
1597 *v = '"';
1598 off++;
1599 continue;
1600 case '0': case '1': case '2': case '3':
1601 case '4': case '5': case '6': case '7':
1602 for (x = k = 0;
1603 k < 3 && *v >= '0' && *v <= '7'; v++) {
1604 x = (x << 3) + (*v - '0');
1605 off++;
1606 }
1607 *--v = (char)x;
1608 break;
1609 case 'x':
1610 for (v++, x = k = 0;
1611 k < 2 && isxdigit(*v); v++) {
1612 x = (x << 4) + (isdigit(*v) ?
1613 (*v - '0') :
1614 (tolower(*v) - 'a' + 10));
1615 off++;
1616 }
1617 *--v = (char)x;
1618 break;
1619 default:
1620 continue;
1621 }
1622 strcpy(p, v);
1623 }
1624 }
1625 return (NULL); /* no closing quote */
1626}
1627
1628/*
1629 * Encode a string so it can be safely put in double quotes.
1630 * Caller must free the result.
1631 */
1632char *
1633ng_encode_string(const char *raw)
1634{
1635 char *cbuf;
1636 int off = 0;
1637
1638 MALLOC(cbuf, char *, strlen(raw) * 4 + 3, M_NETGRAPH, M_NOWAIT);
1639 if (cbuf == NULL)
1640 return (NULL);
1641 cbuf[off++] = '"';
1642 for ( ; *raw != '\0'; raw++) {
1643 switch (*raw) {
1644 case '\t':
1645 cbuf[off++] = '\\';
1646 cbuf[off++] = 't';
1647 break;
1648 case '\f':
1649 cbuf[off++] = '\\';
1650 cbuf[off++] = 'f';
1651 break;
1652 case '\n':
1653 cbuf[off++] = '\\';
1654 cbuf[off++] = 'n';
1655 break;
1656 case '\r':
1657 cbuf[off++] = '\\';
1658 cbuf[off++] = 'r';
1659 break;
1660 case '\v':
1661 cbuf[off++] = '\\';
1662 cbuf[off++] = 'v';
1663 break;
1664 case '"':
1665 case '\\':
1666 cbuf[off++] = '\\';
1667 cbuf[off++] = *raw;
1668 break;
1669 default:
1670 if (*raw < 0x20 || *raw > 0x7e) {
f8c7a42d 1671 off += ksprintf(cbuf + off,
984263bc
MD		 1672 "\\x%02x", (u_char)*raw);
1673 break;
1674 }
1675 cbuf[off++] = *raw;
1676 break;
1677 }
1678 }
1679 cbuf[off++] = '"';
1680 cbuf[off] = '\0';
1681 return (cbuf);
1682}
1683
1684/************************************************************************
1685 VIRTUAL METHOD LOOKUP
1686 ************************************************************************/
1687
1688static ng_parse_t *
1689ng_get_parse_method(const struct ng_parse_type *t)
1690{
1691 while (t != NULL && t->parse == NULL)
1692 t = t->supertype;
1693 return (t ? t->parse : NULL);
1694}
1695
1696static ng_unparse_t *
1697ng_get_unparse_method(const struct ng_parse_type *t)
1698{
1699 while (t != NULL && t->unparse == NULL)
1700 t = t->supertype;
1701 return (t ? t->unparse : NULL);
1702}
1703
1704static ng_getDefault_t *
1705ng_get_getDefault_method(const struct ng_parse_type *t)
1706{
1707 while (t != NULL && t->getDefault == NULL)
1708 t = t->supertype;
1709 return (t ? t->getDefault : NULL);
1710}
1711
1712static ng_getAlign_t *
1713ng_get_getAlign_method(const struct ng_parse_type *t)
1714{
1715 while (t != NULL && t->getAlign == NULL)
1716 t = t->supertype;
1717 return (t ? t->getAlign : NULL);
1718}
1719
DragonFly Project GIT Source repo