projects / project / firewall3.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
history | raw | HEAD
firewall3: make reject types selectable by user
[project/firewall3.git] / options.c
1 /*
2 * firewall3 - 3rd OpenWrt UCI firewall implementation
3 *
4 * Copyright (C) 2013-2014 Jo-Philipp Wich <jo@mein.io>
5 *
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include "options.h"
20 #include "ubus.h"
21
22
23 static bool
24 put_value(void *ptr, void *val, int elem_size, bool is_list)
25 {
26 void *copy;
27
28 if (is_list)
29 {
30 copy = malloc(elem_size);
31
32 if (!copy)
33 return false;
34
35 memcpy(copy, val, elem_size);
36 list_add_tail((struct list_head *)copy, (struct list_head *)ptr);
37 return true;
38 }
39
40 memcpy(ptr, val, elem_size);
41 return false;
42 }
43
44 static bool
45 parse_enum(void *ptr, const char *val, const char **values, int min, int max)
46 {
47 int i, l = strlen(val);
48
49 if (l > 0)
50 {
51 for (i = 0; i <= (max - min); i++)
52 {
53 if (!strncasecmp(val, values[i], l))
54 {
55 *((int *)ptr) = min + i;
56 return true;
57 }
58 }
59 }
60
61 return false;
62 }
63
64
65 const char *fw3_flag_names[__FW3_FLAG_MAX] = {
66 "filter",
67 "nat",
68 "mangle",
69 "raw",
70
71 "IPv4",
72 "IPv6",
73
74 "ACCEPT",
75 "REJECT",
76 "DROP",
77 "NOTRACK",
78 "HELPER",
79 "MARK",
80 "DNAT",
81 "SNAT",
82 "MASQUERADE",
83
84 "ACCEPT",
85 "REJECT",
86 "DROP",
87 };
88
89 const char *fw3_reject_code_names[__FW3_REJECT_CODE_MAX] = {
90 "tcp-reset",
91 "port-unreach",
92 "adm-prohibited",
93 };
94
95 const char *fw3_limit_units[__FW3_LIMIT_UNIT_MAX] = {
96 "second",
97 "minute",
98 "hour",
99 "day",
100 };
101
102 const char *fw3_ipset_method_names[__FW3_IPSET_METHOD_MAX] = {
103 "(bug)",
104 "bitmap",
105 "hash",
106 "list",
107 };
108
109 const char *fw3_ipset_type_names[__FW3_IPSET_TYPE_MAX] = {
110 "(bug)",
111 "ip",
112 "port",
113 "mac",
114 "net",
115 "set",
116 };
117
118 static const char *weekdays[] = {
119 "monday",
120 "tuesday",
121 "wednesday",
122 "thursday",
123 "friday",
124 "saturday",
125 "sunday",
126 };
127
128 static const char *include_types[] = {
129 "script",
130 "restore",
131 };
132
133 static const char *reflection_sources[] = {
134 "internal",
135 "external",
136 };
137
138
139 bool
140 fw3_parse_bool(void *ptr, const char *val, bool is_list)
141 {
142 if (!strcmp(val, "true") || !strcmp(val, "yes") || !strcmp(val, "1"))
143 *((bool *)ptr) = true;
144 else
145 *((bool *)ptr) = false;
146
147 return true;
148 }
149
150 bool
151 fw3_parse_int(void *ptr, const char *val, bool is_list)
152 {
153 char *e;
154 int n = strtol(val, &e, 0);
155
156 if (e == val || *e)
157 return false;
158
159 *((int *)ptr) = n;
160
161 return true;
162 }
163
164 bool
165 fw3_parse_string(void *ptr, const char *val, bool is_list)
166 {
167 *((char **)ptr) = (char *)val;
168 return true;
169 }
170
171 bool
172 fw3_parse_target(void *ptr, const char *val, bool is_list)
173 {
174 return parse_enum(ptr, val, &fw3_flag_names[FW3_FLAG_ACCEPT],
175 FW3_FLAG_ACCEPT, FW3_FLAG_MASQUERADE);
176 }
177
178 bool
179 fw3_parse_reject_code(void *ptr, const char *val, bool is_list)
180 {
181 return parse_enum(ptr, val, &fw3_reject_code_names[FW3_REJECT_CODE_TCP_RESET],
182 FW3_REJECT_CODE_TCP_RESET, FW3_REJECT_CODE_ADM_PROHIBITED);
183 }
184
185 bool
186 fw3_parse_limit(void *ptr, const char *val, bool is_list)
187 {
188 struct fw3_limit *limit = ptr;
189 enum fw3_limit_unit u = FW3_LIMIT_UNIT_SECOND;
190 char *e;
191 int n;
192
193 if (*val == '!')
194 {
195 limit->invert = true;
196 while (isspace(*++val));
197 }
198
199 n = strtol(val, &e, 10);
200
201 if (errno == ERANGE || errno == EINVAL)
202 return false;
203
204 if (*e && *e++ != '/')
205 return false;
206
207 if (!strlen(e))
208 return false;
209
210 if (!parse_enum(&u, e, fw3_limit_units, 0, FW3_LIMIT_UNIT_DAY))
211 return false;
212
213 limit->rate = n;
214 limit->unit = u;
215
216 return true;
217 }
218
219 bool
220 fw3_parse_device(void *ptr, const char *val, bool is_list)
221 {
222 char *p;
223 struct fw3_device dev = { };
224
225 if (*val == '*')
226 {
227 dev.set = true;
228 dev.any = true;
229 put_value(ptr, &dev, sizeof(dev), is_list);
230 return true;
231 }
232
233 if (*val == '!')
234 {
235 dev.invert = true;
236 while (isspace(*++val));
237 }
238
239 if ((p = strchr(val, '@')) != NULL)
240 {
241 *p++ = 0;
242 snprintf(dev.network, sizeof(dev.network), "%s", p);
243 }
244
245 if (*val)
246 snprintf(dev.name, sizeof(dev.name), "%s", val);
247 else
248 return false;
249
250 dev.set = true;
251 put_value(ptr, &dev, sizeof(dev), is_list);
252 return true;
253 }
254
255 bool
256 fw3_parse_address(void *ptr, const char *val, bool is_list)
257 {
258 struct fw3_address addr = { };
259 struct in_addr v4;
260 struct in6_addr v6;
261 char *p = NULL, *m = NULL, *s, *e;
262 int bits = -1;
263
264 if (*val == '!')
265 {
266 addr.invert = true;
267 while (isspace(*++val));
268 }
269
270 s = strdup(val);
271
272 if (!s)
273 return false;
274
275 if ((m = strchr(s, '/')) != NULL)
276 *m++ = 0;
277 else if ((p = strchr(s, '-')) != NULL)
278 *p++ = 0;
279
280 if (inet_pton(AF_INET6, s, &v6))
281 {
282 addr.family = FW3_FAMILY_V6;
283 addr.address.v6 = v6;
284
285 if (m)
286 {
287 if (!inet_pton(AF_INET6, m, &v6))
288 {
289 bits = strtol(m, &e, 10);
290
291 if ((*e != 0) || !fw3_bitlen2netmask(addr.family, bits, &v6))
292 goto fail;
293 }
294
295 addr.mask.v6 = v6;
296 }
297 else if (p)
298 {
299 if (!inet_pton(AF_INET6, p, &addr.mask.v6))
300 goto fail;
301
302 addr.range = true;
303 }
304 else
305 {
306 memset(addr.mask.v6.s6_addr, 0xFF, 16);
307 }
308 }
309 else if (inet_pton(AF_INET, s, &v4))
310 {
311 addr.family = FW3_FAMILY_V4;
312 addr.address.v4 = v4;
313
314 if (m)
315 {
316 if (!inet_pton(AF_INET, m, &v4))
317 {
318 bits = strtol(m, &e, 10);
319
320 if ((*e != 0) || !fw3_bitlen2netmask(addr.family, bits, &v4))
321 goto fail;
322 }
323
324 addr.mask.v4 = v4;
325 }
326 else if (p)
327 {
328 if (!inet_pton(AF_INET, p, &addr.mask.v4))
329 goto fail;
330
331 addr.range = true;
332 }
333 else
334 {
335 addr.mask.v4.s_addr = 0xFFFFFFFF;
336 }
337 }
338 else
339 {
340 goto fail;
341 }
342
343 free(s);
344 addr.set = true;
345 put_value(ptr, &addr, sizeof(addr), is_list);
346 return true;
347
348 fail:
349 free(s);
350 return false;
351 }
352
353 bool
354 fw3_parse_network(void *ptr, const char *val, bool is_list)
355 {
356 struct fw3_device dev = { };
357 struct fw3_address *addr, *tmp;
358 LIST_HEAD(addr_list);
359 int n_addrs;
360
361 if (!fw3_parse_address(ptr, val, is_list))
362 {
363 if (!fw3_parse_device(&dev, val, false))
364 return false;
365
366 n_addrs = fw3_ubus_address(&addr_list, dev.name);
367
368 list_for_each_entry(addr, &addr_list, list)
369 {
370 addr->invert = dev.invert;
371 addr->resolved = true;
372 }
373
374 /* add an empty address member with .set = false, .resolved = true
375 * to signal resolving failure to callers */
376 if (n_addrs == 0)
377 {
378 tmp = fw3_alloc(sizeof(*tmp));
379 tmp->resolved = true;
380
381 list_add_tail(&tmp->list, &addr_list);
382 }
383
384 if (is_list)
385 {
386 list_splice_tail(&addr_list, ptr);
387 }
388 else if (!list_empty(&addr_list))
389 {
390 memcpy(ptr, list_first_entry(&addr_list, typeof(*addr), list),
391 sizeof(*addr));
392
393 list_for_each_entry_safe(addr, tmp, &addr_list, list)
394 free(addr);
395 }
396 }
397
398 return true;
399 }
400
401 bool
402 fw3_parse_mac(void *ptr, const char *val, bool is_list)
403 {
404 struct fw3_mac addr = { };
405 struct ether_addr *mac;
406
407 if (*val == '!')
408 {
409 addr.invert = true;
410 while (isspace(*++val));
411 }
412
413 if ((mac = ether_aton(val)) != NULL)
414 {
415 addr.mac = *mac;
416 addr.set = true;
417
418 put_value(ptr, &addr, sizeof(addr), is_list);
419 return true;
420 }
421
422 return false;
423 }
424
425 bool
426 fw3_parse_port(void *ptr, const char *val, bool is_list)
427 {
428 struct fw3_port range = { };
429 uint16_t n;
430 uint16_t m;
431 char *p;
432
433 if (*val == '!')
434 {
435 range.invert = true;
436 while (isspace(*++val));
437 }
438
439 n = strtoul(val, &p, 10);
440
441 if (errno == ERANGE || errno == EINVAL)
442 return false;
443
444 if (*p && *p != '-' && *p != ':')
445 return false;
446
447 if (*p)
448 {
449 m = strtoul(++p, NULL, 10);
450
451 if (errno == ERANGE || errno == EINVAL || m < n)
452 return false;
453
454 range.port_min = n;
455 range.port_max = m;
456 }
457 else
458 {
459 range.port_min = n;
460 range.port_max = n;
461 }
462
463 range.set = true;
464 put_value(ptr, &range, sizeof(range), is_list);
465 return true;
466 }
467
468 bool
469 fw3_parse_family(void *ptr, const char *val, bool is_list)
470 {
471 if (!strcmp(val, "any") || !strcmp(val, "*"))
472 *((enum fw3_family *)ptr) = FW3_FAMILY_ANY;
473 else if (!strcmp(val, "inet") || strrchr(val, '4'))
474 *((enum fw3_family *)ptr) = FW3_FAMILY_V4;
475 else if (!strcmp(val, "inet6") || strrchr(val, '6'))
476 *((enum fw3_family *)ptr) = FW3_FAMILY_V6;
477 else
478 return false;
479
480 return true;
481 }
482
483 bool
484 fw3_parse_icmptype(void *ptr, const char *val, bool is_list)
485 {
486 struct fw3_icmptype icmp = { };
487 bool v4 = false;
488 bool v6 = false;
489 char *p;
490 int i;
491
492 for (i = 0; i < ARRAY_SIZE(fw3_icmptype_list_v4); i++)
493 {
494 if (!strcmp(val, fw3_icmptype_list_v4[i].name))
495 {
496 icmp.type = fw3_icmptype_list_v4[i].type;
497 icmp.code_min = fw3_icmptype_list_v4[i].code_min;
498 icmp.code_max = fw3_icmptype_list_v4[i].code_max;
499
500 v4 = true;
501 break;
502 }
503 }
504
505 for (i = 0; i < ARRAY_SIZE(fw3_icmptype_list_v6); i++)
506 {
507 if (!strcmp(val, fw3_icmptype_list_v6[i].name))
508 {
509 icmp.type6 = fw3_icmptype_list_v6[i].type;
510 icmp.code6_min = fw3_icmptype_list_v6[i].code_min;
511 icmp.code6_max = fw3_icmptype_list_v6[i].code_max;
512
513 v6 = true;
514 break;
515 }
516 }
517
518 if (!v4 && !v6)
519 {
520 i = strtoul(val, &p, 10);
521
522 if ((p == val) || (*p != '/' && *p != 0) || (i > 0xFF))
523 return false;
524
525 icmp.type = i;
526
527 if (*p == '/')
528 {
529 val = ++p;
530 i = strtoul(val, &p, 10);
531
532 if ((p == val) || (*p != 0) || (i > 0xFF))
533 return false;
534
535 icmp.code_min = i;
536 icmp.code_max = i;
537 }
538 else
539 {
540 icmp.code_min = 0;
541 icmp.code_max = 0xFF;
542 }
543
544 icmp.type6 = icmp.type;
545 icmp.code6_min = icmp.code_max;
546 icmp.code6_max = icmp.code_max;
547
548 v4 = true;
549 v6 = true;
550 }
551
552 icmp.family = (v4 && v6) ? FW3_FAMILY_ANY
553 : (v6 ? FW3_FAMILY_V6 : FW3_FAMILY_V4);
554
555 put_value(ptr, &icmp, sizeof(icmp), is_list);
556 return true;
557 }
558
559 bool
560 fw3_parse_protocol(void *ptr, const char *val, bool is_list)
561 {
562 struct fw3_protocol proto = { };
563 struct protoent *ent;
564 char *e;
565
566 if (*val == '!')
567 {
568 proto.invert = true;
569 while (isspace(*++val));
570 }
571
572 if (!strcmp(val, "all") || !strcmp(val, "any") || !strcmp(val, "*"))
573 {
574 proto.any = true;
575 put_value(ptr, &proto, sizeof(proto), is_list);
576 return true;
577 }
578 else if (!strcmp(val, "icmpv6"))
579 {
580 val = "ipv6-icmp";
581 }
582 else if (!strcmp(val, "tcpudp"))
583 {
584 proto.protocol = 6;
585 if (put_value(ptr, &proto, sizeof(proto), is_list))
586 {
587 proto.protocol = 17;
588 put_value(ptr, &proto, sizeof(proto), is_list);
589 }
590
591 return true;
592 }
593
594 ent = getprotobyname(val);
595
596 if (ent)
597 {
598 proto.protocol = ent->p_proto;
599 put_value(ptr, &proto, sizeof(proto), is_list);
600 return true;
601 }
602
603 proto.protocol = strtoul(val, &e, 10);
604
605 if ((e == val) || (*e != 0))
606 return false;
607
608 put_value(ptr, &proto, sizeof(proto), is_list);
609 return true;
610 }
611
612 bool
613 fw3_parse_ipset_method(void *ptr, const char *val, bool is_list)
614 {
615 return parse_enum(ptr, val, &fw3_ipset_method_names[FW3_IPSET_METHOD_BITMAP],
616 FW3_IPSET_METHOD_BITMAP, FW3_IPSET_METHOD_LIST);
617 }
618
619 bool
620 fw3_parse_ipset_datatype(void *ptr, const char *val, bool is_list)
621 {
622 struct fw3_ipset_datatype type = { };
623
624 type.dir = "src";
625
626 if (!strncmp(val, "dest_", 5))
627 {
628 val += 5;
629 type.dir = "dst";
630 }
631 else if (!strncmp(val, "dst_", 4))
632 {
633 val += 4;
634 type.dir = "dst";
635 }
636 else if (!strncmp(val, "src_", 4))
637 {
638 val += 4;
639 type.dir = "src";
640 }
641
642 if (parse_enum(&type.type, val, &fw3_ipset_type_names[FW3_IPSET_TYPE_IP],
643 FW3_IPSET_TYPE_IP, FW3_IPSET_TYPE_SET))
644 {
645 put_value(ptr, &type, sizeof(type), is_list);
646 return true;
647 }
648
649 return false;
650 }
651
652 bool
653 fw3_parse_date(void *ptr, const char *val, bool is_list)
654 {
655 unsigned int year = 1970, mon = 1, day = 1, hour = 0, min = 0, sec = 0;
656 struct tm tm = { 0 };
657 time_t ts;
658 char *p;
659
660 year = strtoul(val, &p, 10);
661 if ((*p != '-' && *p) || year < 1970 || year > 2038)
662 goto fail;
663 else if (!*p)
664 goto ret;
665
666 mon = strtoul(++p, &p, 10);
667 if ((*p != '-' && *p) || mon > 12)
668 goto fail;
669 else if (!*p)
670 goto ret;
671
672 day = strtoul(++p, &p, 10);
673 if ((*p != 'T' && *p) || day > 31)
674 goto fail;
675 else if (!*p)
676 goto ret;
677
678 hour = strtoul(++p, &p, 10);
679 if ((*p != ':' && *p) || hour > 23)
680 goto fail;
681 else if (!*p)
682 goto ret;
683
684 min = strtoul(++p, &p, 10);
685 if ((*p != ':' && *p) || min > 59)
686 goto fail;
687 else if (!*p)
688 goto ret;
689
690 sec = strtoul(++p, &p, 10);
691 if (*p || sec > 59)
692 goto fail;
693
694 ret:
695 tm.tm_year = year - 1900;
696 tm.tm_mon = mon - 1;
697 tm.tm_mday = day;
698 tm.tm_hour = hour;
699 tm.tm_min = min;
700 tm.tm_sec = sec;
701
702 ts = mktime(&tm) - timezone;
703
704 if (ts >= 0)
705 {
706 gmtime_r(&ts, (struct tm *)ptr);
707 return true;
708 }
709
710 fail:
711 return false;
712 }
713
714 bool
715 fw3_parse_time(void *ptr, const char *val, bool is_list)
716 {
717 unsigned int hour = 0, min = 0, sec = 0;
718 char *p;
719
720 hour = strtoul(val, &p, 10);
721 if (*p != ':' || hour > 23)
722 goto fail;
723
724 min = strtoul(++p, &p, 10);
725 if ((*p != ':' && *p) || min > 59)
726 goto fail;
727 else if (!*p)
728 goto ret;
729
730 sec = strtoul(++p, &p, 10);
731 if (*p || sec > 59)
732 goto fail;
733
734 ret:
735 *((int *)ptr) = 60 * 60 * hour + 60 * min + sec;
736 return true;
737
738 fail:
739 return false;
740 }
741
742 bool
743 fw3_parse_weekdays(void *ptr, const char *val, bool is_list)
744 {
745 unsigned int w = 0;
746 char *p, *s;
747
748 if (*val == '!')
749 {
750 fw3_setbit(*(uint8_t *)ptr, 0);
751 while (isspace(*++val));
752 }
753
754 if (!(s = strdup(val)))
755 return false;
756
757 for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
758 {
759 if (!parse_enum(&w, p, weekdays, 1, 7))
760 {
761 w = strtoul(p, &p, 10);
762
763 if (*p || w < 1 || w > 7)
764 {
765 free(s);
766 return false;
767 }
768 }
769
770 fw3_setbit(*(uint8_t *)ptr, w);
771 }
772
773 free(s);
774 return true;
775 }
776
777 bool
778 fw3_parse_monthdays(void *ptr, const char *val, bool is_list)
779 {
780 unsigned int d;
781 char *p, *s;
782
783 if (*val == '!')
784 {
785 fw3_setbit(*(uint32_t *)ptr, 0);
786 while (isspace(*++val));
787 }
788
789 if (!(s = strdup(val)))
790 return false;
791
792 for (p = strtok(s, " \t"); p; p = strtok(NULL, " \t"))
793 {
794 d = strtoul(p, &p, 10);
795
796 if (*p || d < 1 || d > 31)
797 {
798 free(s);
799 return false;
800 }
801
802 fw3_setbit(*(uint32_t *)ptr, d);
803 }
804
805 free(s);
806 return true;
807 }
808
809 bool
810 fw3_parse_include_type(void *ptr, const char *val, bool is_list)
811 {
812 return parse_enum(ptr, val, include_types,
813 FW3_INC_TYPE_SCRIPT, FW3_INC_TYPE_RESTORE);
814 }
815
816 bool
817 fw3_parse_reflection_source(void *ptr, const char *val, bool is_list)
818 {
819 return parse_enum(ptr, val, reflection_sources,
820 FW3_REFLECTION_INTERNAL, FW3_REFLECTION_EXTERNAL);
821 }
822
823 bool
824 fw3_parse_mark(void *ptr, const char *val, bool is_list)
825 {
826 uint32_t n;
827 char *s, *e;
828 struct fw3_mark *m = ptr;
829
830 if (*val == '!')
831 {
832 m->invert = true;
833 while (isspace(*++val));
834 }
835
836 if ((s = strchr(val, '/')) != NULL)
837 *s++ = 0;
838
839 n = strtoul(val, &e, 0);
840
841 if (e == val || *e)
842 return false;
843
844 m->mark = n;
845 m->mask = 0xFFFFFFFF;
846
847 if (s)
848 {
849 n = strtoul(s, &e, 0);
850
851 if (e == s || *e)
852 return false;
853
854 m->mask = n;
855 }
856
857 m->set = true;
858 return true;
859 }
860
861 bool
862 fw3_parse_setmatch(void *ptr, const char *val, bool is_list)
863 {
864 struct fw3_setmatch *m = ptr;
865 char *p, *s;
866 int i;
867
868 if (*val == '!')
869 {
870 m->invert = true;
871 while (isspace(*++val));
872 }
873
874 if (!(s = strdup(val)))
875 return false;
876
877 if (!(p = strtok(s, " \t")))
878 {
879 free(s);
880 return false;
881 }
882
883 strncpy(m->name, p, sizeof(m->name));
884
885 for (i = 0, p = strtok(NULL, " \t,");
886 i < 3 && p != NULL;
887 i++, p = strtok(NULL, " \t,"))
888 {
889 if (!strncmp(p, "dest", 4) || !strncmp(p, "dst", 3))
890 m->dir[i] = "dst";
891 else if (!strncmp(p, "src", 3))
892 m->dir[i] = "src";
893 }
894
895 free(s);
896
897 m->set = true;
898 return true;
899 }
900
901 bool
902 fw3_parse_direction(void *ptr, const char *val, bool is_list)
903 {
904 bool *is_out = ptr;
905 bool valid = true;
906
907 if (!strcmp(val, "in") || !strcmp(val, "ingress"))
908 *is_out = false;
909 else if (!strcmp(val, "out") || !strcmp(val, "egress"))
910 *is_out = true;
911 else
912 valid = false;
913
914 return valid;
915 }
916
917 bool
918 fw3_parse_cthelper(void *ptr, const char *val, bool is_list)
919 {
920 struct fw3_cthelpermatch m = { };
921
922 if (*val == '!')
923 {
924 m.invert = true;
925 while (isspace(*++val));
926 }
927
928 if (*val)
929 {
930 m.set = true;
931 strncpy(m.name, val, sizeof(m.name) - 1);
932 put_value(ptr, &m, sizeof(m), is_list);
933 return true;
934 }
935
936 return false;
937 }
938
939 bool
940 fw3_parse_setentry(void *ptr, const char *val, bool is_list)
941 {
942 struct fw3_setentry e = { };
943
944 e.value = val;
945 put_value(ptr, &e, sizeof(e), is_list);
946
947 return true;
948 }
949
950
951 bool
952 fw3_parse_options(void *s, const struct fw3_option *opts,
953 struct uci_section *section)
954 {
955 char *p, *v;
956 bool known, inv;
957 struct uci_element *e, *l;
958 struct uci_option *o;
959 const struct fw3_option *opt;
960 struct list_head *dest;
961 bool valid = true;
962
963 uci_foreach_element(&section->options, e)
964 {
965 o = uci_to_option(e);
966 known = false;
967
968 for (opt = opts; opt->name; opt++)
969 {
970 if (!opt->parse)
971 continue;
972
973 if (strcmp(opt->name, e->name))
974 continue;
975
976 if (o->type == UCI_TYPE_LIST)
977 {
978 if (!opt->elem_size)
979 {
980 warn_elem(e, "must not be a list");
981 valid = false;
982 }
983 else
984 {
985 dest = (struct list_head *)((char *)s + opt->offset);
986
987 uci_foreach_element(&o->v.list, l)
988 {
989 if (!l->name)
990 continue;
991
992 if (!opt->parse(dest, l->name, true))
993 {
994 warn_elem(e, "has invalid value '%s'", l->name);
995 valid = false;
996 continue;
997 }
998 }
999 }
1000 }
1001 else
1002 {
1003 v = o->v.string;
1004
1005 if (!v)
1006 continue;
1007
1008 if (!opt->elem_size)
1009 {
1010 if (!opt->parse((char *)s + opt->offset, o->v.string, false))
1011 {
1012 warn_elem(e, "has invalid value '%s'", o->v.string);
1013 valid = false;
1014 }
1015 }
1016 else
1017 {
1018 inv = false;
1019 dest = (struct list_head *)((char *)s + opt->offset);
1020
1021 for (p = strtok(v, " \t"); p != NULL; p = strtok(NULL, " \t"))
1022 {
1023 /* If we encounter a sole "!" token, assume that it
1024 * is meant to be part of the next token, so silently
1025 * skip it and remember the state... */
1026 if (!strcmp(p, "!"))
1027 {
1028 inv = true;
1029 continue;
1030 }
1031
1032 /* The previous token was a sole "!", rewind pointer
1033 * back by one byte to precede the value with an
1034 * exclamation mark which effectively turns
1035 * ("!", "foo") into ("!foo") */
1036 if (inv)
1037 {
1038 *--p = '!';
1039 inv = false;
1040 }
1041
1042 if (!opt->parse(dest, p, true))
1043 {
1044 warn_elem(e, "has invalid value '%s'", p);
1045 valid = false;
1046 continue;
1047 }
1048 }
1049
1050 /* The last token was a sole "!" without any subsequent
1051 * text, so pass it to the option parser as-is. */
1052 if (inv && !opt->parse(dest, "!", true))
1053 {
1054 warn_elem(e, "has invalid value '%s'", p);
1055 valid = false;
1056 }
1057 }
1058 }
1059
1060 known = true;
1061 break;
1062 }
1063
1064 if (!known)
1065 warn_elem(e, "is unknown");
1066 }
1067
1068 return valid;
1069 }
1070
1071
1072 bool
1073 fw3_parse_blob_options(void *s, const struct fw3_option *opts,
1074 struct blob_attr *a, const char *name)
1075 {
1076 char *p, *v, buf[16];
1077 bool known;
1078 unsigned rem, erem;
1079 struct blob_attr *o, *e;
1080 const struct fw3_option *opt;
1081 struct list_head *dest;
1082 bool valid = true;
1083
1084 blobmsg_for_each_attr(o, a, rem)
1085 {
1086 known = false;
1087
1088 for (opt = opts; opt->name; opt++)
1089 {
1090 if (!opt->parse)
1091 continue;
1092
1093 if (strcmp(opt->name, blobmsg_name(o)))
1094 continue;
1095
1096 if (blobmsg_type(o) == BLOBMSG_TYPE_ARRAY)
1097 {
1098 if (!opt->elem_size)
1099 {
1100 fprintf(stderr, "%s: '%s' must not be a list\n",
1101 name, opt->name);
1102
1103 valid = false;
1104 }
1105 else
1106 {
1107 dest = (struct list_head *)((char *)s + opt->offset);
1108
1109 blobmsg_for_each_attr(e, o, erem)
1110 {
1111 if (blobmsg_type(e) == BLOBMSG_TYPE_INT32) {
1112 snprintf(buf, sizeof(buf), "%d", blobmsg_get_u32(e));
1113 v = buf;
1114 } else {
1115 v = blobmsg_get_string(e);
1116 }
1117
1118 if (!opt->parse(dest, v, true))
1119 {
1120 fprintf(stderr, "%s: '%s' has invalid value '%s'\n",
1121 name, opt->name, v);
1122 valid = false;
1123 continue;
1124 }
1125 }
1126 }
1127 }
1128 else
1129 {
1130 if (blobmsg_type(o) == BLOBMSG_TYPE_INT32) {
1131 snprintf(buf, sizeof(buf), "%d", blobmsg_get_u32(o));
1132 v = buf;
1133 } else {
1134 v = blobmsg_get_string(o);
1135 }
1136
1137 if (!v)
1138 continue;
1139
1140 if (!opt->elem_size)
1141 {
1142 if (!opt->parse((char *)s + opt->offset, v, false))
1143 {
1144 fprintf(stderr, "%s: '%s' has invalid value '%s'\n",
1145 name, opt->name, v);
1146 valid = false;
1147 }
1148 }
1149 else
1150 {
1151 dest = (struct list_head *)((char *)s + opt->offset);
1152
1153 for (p = strtok(v, " \t"); p != NULL; p = strtok(NULL, " \t"))
1154 {
1155 if (!opt->parse(dest, p, true))
1156 {
1157 fprintf(stderr, "%s: '%s' has invalid value '%s'\n",
1158 name, opt->name, p);
1159 valid = false;
1160 continue;
1161 }
1162 }
1163 }
1164 }
1165
1166 known = true;
1167 break;
1168 }
1169
1170 if (!known && strcmp(blobmsg_name(o), "type"))
1171 fprintf(stderr, "%s: '%s' is unknown\n", name, blobmsg_name(o));
1172 }
1173
1174 return valid;
1175 }
1176
1177
1178 const char *
1179 fw3_address_to_string(struct fw3_address *address, bool allow_invert, bool as_cidr)
1180 {
1181 char *p, ip[INET6_ADDRSTRLEN];
1182 static char buf[INET6_ADDRSTRLEN * 2 + 2];
1183
1184 p = buf;
1185
1186 if (address->invert && allow_invert)
1187 p += sprintf(p, "!");
1188
1189 inet_ntop(address->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
1190 &address->address.v4, ip, sizeof(ip));
1191
1192 p += sprintf(p, "%s", ip);
1193
1194 if (address->range)
1195 {
1196 inet_ntop(address->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
1197 &address->mask.v4, ip, sizeof(ip));
1198
1199 p += sprintf(p, "-%s", ip);
1200 }
1201 else if (!as_cidr)
1202 {
1203 inet_ntop(address->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
1204 &address->mask.v4, ip, sizeof(ip));
1205
1206 p += sprintf(p, "/%s", ip);
1207 }
1208 else
1209 {
1210 p += sprintf(p, "/%u", fw3_netmask2bitlen(address->family,
1211 &address->mask.v6));
1212 }
1213
1214 return buf;
1215 }
OpenWrt firewall configuration utility