2 * firewall3 - 3rd OpenWrt UCI firewall implementation
4 * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
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.
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.
24 put_value(void *ptr
, void *val
, int elem_size
, bool is_list
)
30 copy
= malloc(elem_size
);
35 memcpy(copy
, val
, elem_size
);
36 list_add_tail((struct list_head
*)copy
, (struct list_head
*)ptr
);
40 memcpy(ptr
, val
, elem_size
);
45 parse_enum(void *ptr
, const char *val
, const char **values
, int min
, int max
)
47 int i
, l
= strlen(val
);
51 for (i
= 0; i
<= (max
- min
); i
++)
53 if (!strncasecmp(val
, values
[i
], l
))
55 *((int *)ptr
) = min
+ i
;
65 const char *fw3_flag_names
[__FW3_FLAG_MAX
] = {
87 const char *fw3_limit_units
[__FW3_LIMIT_UNIT_MAX
] = {
94 const char *fw3_ipset_method_names
[__FW3_IPSET_METHOD_MAX
] = {
101 const char *fw3_ipset_type_names
[__FW3_IPSET_TYPE_MAX
] = {
110 static const char *weekdays
[] = {
120 static const char *include_types
[] = {
125 static const char *reflection_sources
[] = {
132 fw3_parse_bool(void *ptr
, const char *val
, bool is_list
)
134 if (!strcmp(val
, "true") || !strcmp(val
, "yes") || !strcmp(val
, "1"))
135 *((bool *)ptr
) = true;
137 *((bool *)ptr
) = false;
143 fw3_parse_int(void *ptr
, const char *val
, bool is_list
)
145 int n
= strtol(val
, NULL
, 0);
147 if (errno
== ERANGE
|| errno
== EINVAL
)
156 fw3_parse_string(void *ptr
, const char *val
, bool is_list
)
158 *((char **)ptr
) = (char *)val
;
163 fw3_parse_target(void *ptr
, const char *val
, bool is_list
)
165 return parse_enum(ptr
, val
, &fw3_flag_names
[FW3_FLAG_ACCEPT
],
166 FW3_FLAG_ACCEPT
, FW3_FLAG_SNAT
);
170 fw3_parse_limit(void *ptr
, const char *val
, bool is_list
)
172 struct fw3_limit
*limit
= ptr
;
173 enum fw3_limit_unit u
= FW3_LIMIT_UNIT_SECOND
;
179 limit
->invert
= true;
180 while (isspace(*++val
));
183 n
= strtol(val
, &e
, 10);
185 if (errno
== ERANGE
|| errno
== EINVAL
)
188 if (*e
&& *e
++ != '/')
194 if (!parse_enum(&u
, e
, fw3_limit_units
, 0, FW3_LIMIT_UNIT_DAY
))
204 fw3_parse_device(void *ptr
, const char *val
, bool is_list
)
207 struct fw3_device dev
= { };
213 put_value(ptr
, &dev
, sizeof(dev
), is_list
);
220 while (isspace(*++val
));
223 if ((p
= strchr(val
, '@')) != NULL
)
226 snprintf(dev
.network
, sizeof(dev
.network
), "%s", p
);
230 snprintf(dev
.name
, sizeof(dev
.name
), "%s", val
);
235 put_value(ptr
, &dev
, sizeof(dev
), is_list
);
240 fw3_parse_address(void *ptr
, const char *val
, bool is_list
)
242 struct fw3_address addr
= { };
251 while (isspace(*++val
));
259 if ((p
= strchr(s
, '/')) != NULL
)
262 m
= strtoul(p
, &e
, 10);
264 if ((e
== p
) || (*e
!= 0))
266 if (strchr(s
, ':') || !inet_pton(AF_INET
, p
, &v4
))
272 for (i
= 0, m
= 32; !(v4
.s_addr
& 1) && (i
< 32); i
++)
279 else if ((p
= strchr(s
, '-')) != NULL
)
283 if (inet_pton(AF_INET6
, p
, &v6
))
285 addr
.family
= FW3_FAMILY_V6
;
286 addr
.address2
.v6
= v6
;
289 else if (inet_pton(AF_INET
, p
, &v4
))
291 addr
.family
= FW3_FAMILY_V4
;
292 addr
.address2
.v4
= v4
;
302 if (inet_pton(AF_INET6
, s
, &v6
))
304 addr
.family
= FW3_FAMILY_V6
;
305 addr
.address
.v6
= v6
;
306 addr
.mask
= (m
>= 0) ? m
: 128;
308 else if (inet_pton(AF_INET
, s
, &v4
))
310 addr
.family
= FW3_FAMILY_V4
;
311 addr
.address
.v4
= v4
;
312 addr
.mask
= (m
>= 0) ? m
: 32;
322 put_value(ptr
, &addr
, sizeof(addr
), is_list
);
327 fw3_parse_network(void *ptr
, const char *val
, bool is_list
)
329 struct fw3_device dev
= { };
330 struct fw3_address
*addr
;
331 struct list_head
*addr_list
;
333 if (!fw3_parse_address(ptr
, val
, is_list
))
335 if (!fw3_parse_device(&dev
, val
, false))
338 addr_list
= fw3_ubus_address(dev
.name
);
342 list_for_each_entry(addr
, addr_list
, list
)
344 addr
->invert
= dev
.invert
;
345 addr
->resolved
= true;
347 if (!put_value(ptr
, addr
, sizeof(*addr
), is_list
))
351 fw3_free_list(addr_list
);
359 fw3_parse_mac(void *ptr
, const char *val
, bool is_list
)
361 struct fw3_mac addr
= { };
362 struct ether_addr
*mac
;
367 while (isspace(*++val
));
370 if ((mac
= ether_aton(val
)) != NULL
)
375 put_value(ptr
, &addr
, sizeof(addr
), is_list
);
383 fw3_parse_port(void *ptr
, const char *val
, bool is_list
)
385 struct fw3_port range
= { };
393 while (isspace(*++val
));
396 n
= strtoul(val
, &p
, 10);
398 if (errno
== ERANGE
|| errno
== EINVAL
)
401 if (*p
&& *p
!= '-' && *p
!= ':')
406 m
= strtoul(++p
, NULL
, 10);
408 if (errno
== ERANGE
|| errno
== EINVAL
|| m
< n
)
421 put_value(ptr
, &range
, sizeof(range
), is_list
);
426 fw3_parse_family(void *ptr
, const char *val
, bool is_list
)
428 if (!strcmp(val
, "any"))
429 *((enum fw3_family
*)ptr
) = FW3_FAMILY_ANY
;
430 else if (!strcmp(val
, "inet") || strrchr(val
, '4'))
431 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V4
;
432 else if (!strcmp(val
, "inet6") || strrchr(val
, '6'))
433 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V6
;
441 fw3_parse_icmptype(void *ptr
, const char *val
, bool is_list
)
443 struct fw3_icmptype icmp
= { };
449 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v4
); i
++)
451 if (!strcmp(val
, fw3_icmptype_list_v4
[i
].name
))
453 icmp
.type
= fw3_icmptype_list_v4
[i
].type
;
454 icmp
.code_min
= fw3_icmptype_list_v4
[i
].code_min
;
455 icmp
.code_max
= fw3_icmptype_list_v4
[i
].code_max
;
462 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v6
); i
++)
464 if (!strcmp(val
, fw3_icmptype_list_v6
[i
].name
))
466 icmp
.type6
= fw3_icmptype_list_v6
[i
].type
;
467 icmp
.code6_min
= fw3_icmptype_list_v6
[i
].code_min
;
468 icmp
.code6_max
= fw3_icmptype_list_v6
[i
].code_max
;
477 i
= strtoul(val
, &p
, 10);
479 if ((p
== val
) || (*p
!= '/' && *p
!= 0) || (i
> 0xFF))
487 i
= strtoul(val
, &p
, 10);
489 if ((p
== val
) || (*p
!= 0) || (i
> 0xFF))
498 icmp
.code_max
= 0xFF;
501 icmp
.type6
= icmp
.type
;
502 icmp
.code6_min
= icmp
.code_max
;
503 icmp
.code6_max
= icmp
.code_max
;
509 icmp
.family
= (v4
&& v6
) ? FW3_FAMILY_ANY
510 : (v6
? FW3_FAMILY_V6
: FW3_FAMILY_V4
);
512 put_value(ptr
, &icmp
, sizeof(icmp
), is_list
);
517 fw3_parse_protocol(void *ptr
, const char *val
, bool is_list
)
519 struct fw3_protocol proto
= { };
520 struct protoent
*ent
;
525 while (isspace(*++val
));
528 if (!strcmp(val
, "all"))
531 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
534 else if (!strcmp(val
, "icmpv6"))
538 else if (!strcmp(val
, "tcpudp"))
541 if (put_value(ptr
, &proto
, sizeof(proto
), is_list
))
544 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
550 ent
= getprotobyname(val
);
554 proto
.protocol
= ent
->p_proto
;
555 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
559 proto
.protocol
= strtoul(val
, NULL
, 10);
561 if (errno
== ERANGE
|| errno
== EINVAL
)
564 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
569 fw3_parse_ipset_method(void *ptr
, const char *val
, bool is_list
)
571 return parse_enum(ptr
, val
, &fw3_ipset_method_names
[FW3_IPSET_METHOD_BITMAP
],
572 FW3_IPSET_METHOD_BITMAP
, FW3_IPSET_METHOD_LIST
);
576 fw3_parse_ipset_datatype(void *ptr
, const char *val
, bool is_list
)
578 struct fw3_ipset_datatype type
= { };
580 if (!strncmp(val
, "dest_", 5))
585 else if (!strncmp(val
, "dst_", 4))
590 else if (!strncmp(val
, "src_", 4))
596 if (parse_enum(&type
.type
, val
, &fw3_ipset_type_names
[FW3_IPSET_TYPE_IP
],
597 FW3_IPSET_TYPE_IP
, FW3_IPSET_TYPE_SET
))
599 put_value(ptr
, &type
, sizeof(type
), is_list
);
607 fw3_parse_date(void *ptr
, const char *val
, bool is_list
)
609 unsigned int year
= 1970, mon
= 1, day
= 1, hour
= 0, min
= 0, sec
= 0;
610 struct tm tm
= { 0 };
613 year
= strtoul(val
, &p
, 10);
614 if ((*p
!= '-' && *p
) || year
< 1970 || year
> 2038)
619 mon
= strtoul(++p
, &p
, 10);
620 if ((*p
!= '-' && *p
) || mon
> 12)
625 day
= strtoul(++p
, &p
, 10);
626 if ((*p
!= 'T' && *p
) || day
> 31)
631 hour
= strtoul(++p
, &p
, 10);
632 if ((*p
!= ':' && *p
) || hour
> 23)
637 min
= strtoul(++p
, &p
, 10);
638 if ((*p
!= ':' && *p
) || min
> 59)
643 sec
= strtoul(++p
, &p
, 10);
648 tm
.tm_year
= year
- 1900;
655 if (mktime(&tm
) >= 0)
657 *((struct tm
*)ptr
) = tm
;
666 fw3_parse_time(void *ptr
, const char *val
, bool is_list
)
668 unsigned int hour
= 0, min
= 0, sec
= 0;
671 hour
= strtoul(val
, &p
, 10);
672 if (*p
!= ':' || hour
> 23)
675 min
= strtoul(++p
, &p
, 10);
676 if ((*p
!= ':' && *p
) || min
> 59)
681 sec
= strtoul(++p
, &p
, 10);
686 *((int *)ptr
) = 60 * 60 * hour
+ 60 * min
+ sec
;
694 fw3_parse_weekdays(void *ptr
, const char *val
, bool is_list
)
701 setbit(*(uint8_t *)ptr
, 0);
702 while (isspace(*++val
));
705 if (!(s
= strdup(val
)))
708 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
710 if (!parse_enum(&w
, p
, weekdays
, 1, 7))
712 w
= strtoul(p
, &p
, 10);
714 if (*p
|| w
< 1 || w
> 7)
721 setbit(*(uint8_t *)ptr
, w
);
729 fw3_parse_monthdays(void *ptr
, const char *val
, bool is_list
)
736 setbit(*(uint32_t *)ptr
, 0);
737 while (isspace(*++val
));
740 if (!(s
= strdup(val
)))
743 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
745 d
= strtoul(p
, &p
, 10);
747 if (*p
|| d
< 1 || d
> 31)
753 setbit(*(uint32_t *)ptr
, d
);
761 fw3_parse_include_type(void *ptr
, const char *val
, bool is_list
)
763 return parse_enum(ptr
, val
, include_types
,
764 FW3_INC_TYPE_SCRIPT
, FW3_INC_TYPE_RESTORE
);
768 fw3_parse_reflection_source(void *ptr
, const char *val
, bool is_list
)
770 return parse_enum(ptr
, val
, reflection_sources
,
771 FW3_REFLECTION_INTERNAL
, FW3_REFLECTION_EXTERNAL
);
775 fw3_parse_mark(void *ptr
, const char *val
, bool is_list
)
779 struct fw3_mark
*m
= ptr
;
784 while (isspace(*++val
));
787 if ((s
= strchr(val
, '/')) != NULL
)
790 n
= strtoul(val
, &e
, 0);
796 m
->mask
= 0xFFFFFFFF;
800 n
= strtoul(s
, &e
, 0);
814 fw3_parse_options(void *s
, const struct fw3_option
*opts
,
815 struct uci_section
*section
)
819 struct uci_element
*e
, *l
;
820 struct uci_option
*o
;
821 const struct fw3_option
*opt
;
822 struct list_head
*dest
;
824 uci_foreach_element(§ion
->options
, e
)
826 o
= uci_to_option(e
);
829 for (opt
= opts
; opt
->name
; opt
++)
834 if (strcmp(opt
->name
, e
->name
))
837 if (o
->type
== UCI_TYPE_LIST
)
841 warn_elem(e
, "must not be a list");
845 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
847 uci_foreach_element(&o
->v
.list
, l
)
852 if (!opt
->parse(dest
, l
->name
, true))
854 warn_elem(e
, "has invalid value '%s'", l
->name
);
869 if (!opt
->parse((char *)s
+ opt
->offset
, o
->v
.string
, false))
870 warn_elem(e
, "has invalid value '%s'", o
->v
.string
);
874 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
876 for (p
= strtok(v
, " \t"); p
!= NULL
; p
= strtok(NULL
, " \t"))
878 if (!opt
->parse(dest
, p
, true))
880 warn_elem(e
, "has invalid value '%s'", p
);
892 warn_elem(e
, "is unknown");
898 fw3_address_to_string(struct fw3_address
*address
, bool allow_invert
)
900 char *p
, ip
[INET6_ADDRSTRLEN
];
901 static char buf
[INET6_ADDRSTRLEN
* 2 + 2];
905 if (address
->invert
&& allow_invert
)
906 p
+= sprintf(p
, "!");
908 inet_ntop(address
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
909 &address
->address
.v4
, ip
, sizeof(ip
));
911 p
+= sprintf(p
, "%s", ip
);
915 inet_ntop(address
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
916 &address
->address2
.v4
, ip
, sizeof(ip
));
918 p
+= sprintf(p
, "-%s", ip
);
922 p
+= sprintf(p
, "/%u", address
->mask
);