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.
23 parse_enum(void *ptr
, const char *val
, const char **values
, int min
, int max
)
25 int i
, l
= strlen(val
);
29 for (i
= 0; i
<= (max
- min
); i
++)
31 if (!strncasecmp(val
, values
[i
], l
))
33 *((int *)ptr
) = min
+ i
;
43 const char *fw3_flag_names
[FW3_DEFAULT_DROP_INVALID
+ 1] = {
64 static const char *limit_units
[] = {
71 static const char *ipset_methods
[] = {
77 static const char *ipset_types
[] = {
85 static const char *weekdays
[] = {
95 static const char *include_types
[] = {
102 fw3_parse_bool(void *ptr
, const char *val
)
104 if (!strcmp(val
, "true") || !strcmp(val
, "yes") || !strcmp(val
, "1"))
105 *((bool *)ptr
) = true;
107 *((bool *)ptr
) = false;
113 fw3_parse_int(void *ptr
, const char *val
)
115 int n
= strtol(val
, NULL
, 10);
117 if (errno
== ERANGE
|| errno
== EINVAL
)
126 fw3_parse_string(void *ptr
, const char *val
)
128 *((char **)ptr
) = (char *)val
;
133 fw3_parse_target(void *ptr
, const char *val
)
135 return parse_enum(ptr
, val
, &fw3_flag_names
[FW3_TARGET_ACCEPT
],
136 FW3_TARGET_ACCEPT
, FW3_TARGET_SNAT
);
140 fw3_parse_limit(void *ptr
, const char *val
)
142 struct fw3_limit
*limit
= ptr
;
143 enum fw3_limit_unit u
= FW3_LIMIT_UNIT_SECOND
;
149 limit
->invert
= true;
150 while (isspace(*++val
));
153 n
= strtol(val
, &e
, 10);
155 if (errno
== ERANGE
|| errno
== EINVAL
)
158 if (*e
&& *e
++ != '/')
164 if (!parse_enum(&u
, e
, limit_units
, 0, FW3_LIMIT_UNIT_DAY
))
174 fw3_parse_device(void *ptr
, const char *val
)
176 struct fw3_device
*dev
= ptr
;
188 while (isspace(*++val
));
192 snprintf(dev
->name
, sizeof(dev
->name
), "%s", val
);
201 fw3_parse_address(void *ptr
, const char *val
)
203 struct fw3_address
*addr
= ptr
;
212 while (isspace(*++val
));
220 if ((p
= strchr(s
, '/')) != NULL
)
223 m
= strtoul(p
, &e
, 10);
225 if ((e
== p
) || (*e
!= 0))
227 if (strchr(s
, ':') || !inet_pton(AF_INET
, p
, &v4
))
233 for (i
= 0, m
= 32; !(v4
.s_addr
& 1) && (i
< 32); i
++)
240 else if ((p
= strchr(s
, '-')) != NULL
)
244 if (inet_pton(AF_INET6
, p
, &v6
))
246 addr
->family
= FW3_FAMILY_V6
;
247 addr
->address2
.v6
= v6
;
250 else if (inet_pton(AF_INET
, p
, &v4
))
252 addr
->family
= FW3_FAMILY_V4
;
253 addr
->address2
.v4
= v4
;
263 if (inet_pton(AF_INET6
, s
, &v6
))
265 addr
->family
= FW3_FAMILY_V6
;
266 addr
->address
.v6
= v6
;
267 addr
->mask
= (m
>= 0) ? m
: 128;
269 else if (inet_pton(AF_INET
, s
, &v4
))
271 addr
->family
= FW3_FAMILY_V4
;
272 addr
->address
.v4
= v4
;
273 addr
->mask
= (m
>= 0) ? m
: 32;
287 fw3_parse_mac(void *ptr
, const char *val
)
289 struct fw3_mac
*addr
= ptr
;
290 struct ether_addr
*mac
;
295 while (isspace(*++val
));
298 if ((mac
= ether_aton(val
)) != NULL
)
309 fw3_parse_port(void *ptr
, const char *val
)
311 struct fw3_port
*range
= ptr
;
318 range
->invert
= true;
319 while (isspace(*++val
));
322 n
= strtoul(val
, &p
, 10);
324 if (errno
== ERANGE
|| errno
== EINVAL
)
327 if (*p
&& *p
!= '-' && *p
!= ':')
332 m
= strtoul(++p
, NULL
, 10);
334 if (errno
== ERANGE
|| errno
== EINVAL
|| m
< n
)
351 fw3_parse_family(void *ptr
, const char *val
)
353 if (!strcmp(val
, "any"))
354 *((enum fw3_family
*)ptr
) = FW3_FAMILY_ANY
;
355 else if (!strcmp(val
, "inet") || strrchr(val
, '4'))
356 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V4
;
357 else if (!strcmp(val
, "inet6") || strrchr(val
, '6'))
358 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V6
;
366 fw3_parse_icmptype(void *ptr
, const char *val
)
368 struct fw3_icmptype
*icmp
= ptr
;
374 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v4
); i
++)
376 if (!strcmp(val
, fw3_icmptype_list_v4
[i
].name
))
378 icmp
->type
= fw3_icmptype_list_v4
[i
].type
;
379 icmp
->code_min
= fw3_icmptype_list_v4
[i
].code_min
;
380 icmp
->code_max
= fw3_icmptype_list_v4
[i
].code_max
;
387 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v6
); i
++)
389 if (!strcmp(val
, fw3_icmptype_list_v6
[i
].name
))
391 icmp
->type6
= fw3_icmptype_list_v6
[i
].type
;
392 icmp
->code6_min
= fw3_icmptype_list_v6
[i
].code_min
;
393 icmp
->code6_max
= fw3_icmptype_list_v6
[i
].code_max
;
402 i
= strtoul(val
, &p
, 10);
404 if ((p
== val
) || (*p
!= '/' && *p
!= 0) || (i
> 0xFF))
412 i
= strtoul(val
, &p
, 10);
414 if ((p
== val
) || (*p
!= 0) || (i
> 0xFF))
423 icmp
->code_max
= 0xFF;
426 icmp
->type6
= icmp
->type
;
427 icmp
->code6_min
= icmp
->code_max
;
428 icmp
->code6_max
= icmp
->code_max
;
434 icmp
->family
= (v4
&& v6
) ? FW3_FAMILY_ANY
435 : (v6
? FW3_FAMILY_V6
: FW3_FAMILY_V4
);
441 fw3_parse_protocol(void *ptr
, const char *val
)
443 struct fw3_protocol
*proto
= ptr
;
444 struct protoent
*ent
;
448 proto
->invert
= true;
449 while (isspace(*++val
));
452 if (!strcmp(val
, "all"))
457 else if (!strcmp(val
, "icmpv6"))
462 ent
= getprotobyname(val
);
466 proto
->protocol
= ent
->p_proto
;
470 proto
->protocol
= strtoul(val
, NULL
, 10);
471 return (errno
!= ERANGE
&& errno
!= EINVAL
);
475 fw3_parse_ipset_method(void *ptr
, const char *val
)
477 return parse_enum(ptr
, val
, ipset_methods
,
478 FW3_IPSET_METHOD_BITMAP
, FW3_IPSET_METHOD_LIST
);
482 fw3_parse_ipset_datatype(void *ptr
, const char *val
)
484 struct fw3_ipset_datatype
*type
= ptr
;
486 if (!strncmp(val
, "dest_", 5))
491 else if (!strncmp(val
, "dst_", 4))
496 else if (!strncmp(val
, "src_", 4))
502 return parse_enum(&type
->type
, val
, ipset_types
,
503 FW3_IPSET_TYPE_IP
, FW3_IPSET_TYPE_SET
);
507 fw3_parse_date(void *ptr
, const char *val
)
509 unsigned int year
= 1970, mon
= 1, day
= 1, hour
= 0, min
= 0, sec
= 0;
510 struct tm tm
= { 0 };
513 year
= strtoul(val
, &p
, 10);
514 if ((*p
!= '-' && *p
) || year
< 1970 || year
> 2038)
519 mon
= strtoul(++p
, &p
, 10);
520 if ((*p
!= '-' && *p
) || mon
> 12)
525 day
= strtoul(++p
, &p
, 10);
526 if ((*p
!= 'T' && *p
) || day
> 31)
531 hour
= strtoul(++p
, &p
, 10);
532 if ((*p
!= ':' && *p
) || hour
> 23)
537 min
= strtoul(++p
, &p
, 10);
538 if ((*p
!= ':' && *p
) || min
> 59)
543 sec
= strtoul(++p
, &p
, 10);
548 tm
.tm_year
= year
- 1900;
555 if (mktime(&tm
) >= 0)
557 *((struct tm
*)ptr
) = tm
;
566 fw3_parse_time(void *ptr
, const char *val
)
568 unsigned int hour
= 0, min
= 0, sec
= 0;
571 hour
= strtoul(val
, &p
, 10);
572 if (*p
!= ':' || hour
> 23)
575 min
= strtoul(++p
, &p
, 10);
576 if ((*p
!= ':' && *p
) || min
> 59)
581 sec
= strtoul(++p
, &p
, 10);
586 *((int *)ptr
) = 60 * 60 * hour
+ 60 * min
+ sec
;
594 fw3_parse_weekdays(void *ptr
, const char *val
)
601 setbit(*(uint8_t *)ptr
, 0);
602 while (isspace(*++val
));
605 if (!(s
= strdup(val
)))
608 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
610 if (!parse_enum(&w
, p
, weekdays
, 1, 7))
612 w
= strtoul(p
, &p
, 10);
614 if (*p
|| w
< 1 || w
> 7)
621 setbit(*(uint8_t *)ptr
, w
);
629 fw3_parse_monthdays(void *ptr
, const char *val
)
636 setbit(*(uint32_t *)ptr
, 0);
637 while (isspace(*++val
));
640 if (!(s
= strdup(val
)))
643 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
645 d
= strtoul(p
, &p
, 10);
647 if (*p
|| d
< 1 || d
> 31)
653 setbit(*(uint32_t *)ptr
, d
);
661 fw3_parse_include_type(void *ptr
, const char *val
)
663 return parse_enum(ptr
, val
, include_types
,
664 FW3_INC_TYPE_SCRIPT
, FW3_INC_TYPE_RESTORE
);
669 fw3_parse_options(void *s
, const struct fw3_option
*opts
,
670 struct uci_section
*section
)
674 struct uci_element
*e
, *l
;
675 struct uci_option
*o
;
676 const struct fw3_option
*opt
;
677 struct list_head
*item
;
678 struct list_head
*dest
;
680 uci_foreach_element(§ion
->options
, e
)
682 o
= uci_to_option(e
);
685 for (opt
= opts
; opt
->name
; opt
++)
690 if (strcmp(opt
->name
, e
->name
))
693 if (o
->type
== UCI_TYPE_LIST
)
697 warn_elem(e
, "must not be a list");
701 uci_foreach_element(&o
->v
.list
, l
)
706 item
= malloc(opt
->elem_size
);
711 memset(item
, 0, opt
->elem_size
);
713 if (!opt
->parse(item
, l
->name
))
715 warn_elem(e
, "has invalid value '%s'", l
->name
);
720 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
721 list_add_tail(item
, dest
);
732 /* protocol "tcpudp" compatibility hack */
733 if (opt
->parse
== fw3_parse_protocol
&& !strcmp(v
, "tcpudp"))
734 v
= strdup("tcp udp");
738 if (!opt
->parse((char *)s
+ opt
->offset
, o
->v
.string
))
739 warn_elem(e
, "has invalid value '%s'", o
->v
.string
);
743 for (p
= strtok(v
, " \t"); p
!= NULL
; p
= strtok(NULL
, " \t"))
745 item
= malloc(opt
->elem_size
);
750 memset(item
, 0, opt
->elem_size
);
752 if (!opt
->parse(item
, p
))
754 warn_elem(e
, "has invalid value '%s'", p
);
759 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
760 list_add_tail(item
, dest
);
764 if (v
!= o
->v
.string
)
773 warn_elem(e
, "is unknown");
779 fw3_format_in_out(struct fw3_device
*in
, struct fw3_device
*out
)
782 fw3_pr(" %s-i %s", in
->invert
? "! " : "", in
->name
);
784 if (out
&& !out
->any
)
785 fw3_pr(" %s-o %s", out
->invert
? "! " : "", out
->name
);
789 fw3_format_src_dest(struct fw3_address
*src
, struct fw3_address
*dest
)
791 char s
[INET6_ADDRSTRLEN
];
793 if ((src
&& src
->range
) || (dest
&& dest
->range
))
794 fw3_pr(" -m iprange");
800 inet_ntop(src
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
801 &src
->address
.v4
, s
, sizeof(s
));
803 fw3_pr(" %s--src-range %s", src
->invert
? "! " : "", s
);
805 inet_ntop(src
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
806 &src
->address2
.v4
, s
, sizeof(s
));
812 inet_ntop(src
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
813 &src
->address
.v4
, s
, sizeof(s
));
815 fw3_pr(" %s-s %s/%u", src
->invert
? "! " : "", s
, src
->mask
);
819 if (dest
&& dest
->set
)
823 inet_ntop(dest
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
824 &dest
->address
.v4
, s
, sizeof(s
));
826 fw3_pr(" %s--dst-range %s", dest
->invert
? "! " : "", s
);
828 inet_ntop(dest
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
829 &dest
->address2
.v4
, s
, sizeof(s
));
835 inet_ntop(dest
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
836 &dest
->address
.v4
, s
, sizeof(s
));
838 fw3_pr(" %s-d %s/%u", dest
->invert
? "! " : "", s
, dest
->mask
);
844 fw3_format_sport_dport(struct fw3_port
*sp
, struct fw3_port
*dp
)
848 if (sp
->port_min
== sp
->port_max
)
849 fw3_pr(" %s--sport %u", sp
->invert
? "! " : "", sp
->port_min
);
851 fw3_pr(" %s--sport %u:%u",
852 sp
->invert
? "! " : "", sp
->port_min
, sp
->port_max
);
857 if (dp
->port_min
== dp
->port_max
)
858 fw3_pr(" %s--dport %u", dp
->invert
? "! " : "", dp
->port_min
);
860 fw3_pr(" %s--dport %u:%u",
861 dp
->invert
? "! " : "", dp
->port_min
, dp
->port_max
);
866 fw3_format_mac(struct fw3_mac
*mac
)
871 fw3_pr(" -m mac %s--mac-source %s",
872 mac
->invert
? "! " : "", ether_ntoa(&mac
->mac
));
876 fw3_format_protocol(struct fw3_protocol
*proto
, enum fw3_family family
)
883 pr
= proto
->protocol
;
885 if (pr
== 1 && family
== FW3_FAMILY_V6
)
891 fw3_pr(" %s-p %u", proto
->invert
? "! " : "", pr
);
895 fw3_format_icmptype(struct fw3_icmptype
*icmp
, enum fw3_family family
)
900 if (family
!= FW3_FAMILY_V6
)
902 if (icmp
->code_min
== 0 && icmp
->code_max
== 0xFF)
903 fw3_pr(" %s--icmp-type %u", icmp
->invert
? "! " : "", icmp
->type
);
905 fw3_pr(" %s--icmp-type %u/%u",
906 icmp
->invert
? "! " : "", icmp
->type
, icmp
->code_min
);
910 if (icmp
->code6_min
== 0 && icmp
->code6_max
== 0xFF)
911 fw3_pr(" %s--icmpv6-type %u", icmp
->invert
? "! " : "", icmp
->type6
);
913 fw3_pr(" %s--icmpv6-type %u/%u",
914 icmp
->invert
? "! " : "", icmp
->type6
, icmp
->code6_min
);
919 fw3_format_limit(struct fw3_limit
*limit
)
926 fw3_pr(" -m limit %s--limit %u/%s",
927 limit
->invert
? "! " : "",
928 limit
->rate
, limit_units
[limit
->unit
]);
930 if (limit
->burst
> 0)
931 fw3_pr(" --limit-burst %u", limit
->burst
);
936 fw3_format_ipset(struct fw3_ipset
*ipset
, bool invert
)
939 const char *name
= NULL
;
940 struct fw3_ipset_datatype
*type
;
945 if (ipset
->external
&& *ipset
->external
)
946 name
= ipset
->external
;
950 fw3_pr(" -m set %s--match-set %s", invert
? "! " : "", name
);
952 list_for_each_entry(type
, &ipset
->datatypes
, list
)
954 fw3_pr("%c%s", first
? ' ' : ',', type
->dest
? "dst" : "src");
960 fw3_format_time(struct fw3_time
*time
)
963 struct tm empty
= { 0 };
964 char buf
[sizeof("9999-99-99T23:59:59\0")];
965 bool d1
= memcmp(&time
->datestart
, &empty
, sizeof(empty
));
966 bool d2
= memcmp(&time
->datestop
, &empty
, sizeof(empty
));
969 if (!d1
&& !d2
&& !time
->timestart
&& !time
->timestop
&&
970 !(time
->monthdays
& 0xFFFFFFFE) && !(time
->weekdays
& 0xFE))
982 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestart
);
983 fw3_pr(" --datestart %s", buf
);
988 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestop
);
989 fw3_pr(" --datestop %s", buf
);
994 fw3_pr(" --timestart %02d:%02d:%02d",
995 time
->timestart
/ 3600,
996 time
->timestart
% 3600 / 60,
997 time
->timestart
% 60);
1002 fw3_pr(" --timestop %02d:%02d:%02d",
1003 time
->timestop
/ 3600,
1004 time
->timestop
% 3600 / 60,
1005 time
->timestop
% 60);
1008 if (time
->monthdays
& 0xFFFFFFFE)
1010 fw3_pr(" %s--monthdays", hasbit(time
->monthdays
, 0) ? "! " : "");
1012 for (i
= 1, first
= true; i
< 32; i
++)
1014 if (hasbit(time
->monthdays
, i
))
1016 fw3_pr("%c%u", first
? ' ' : ',', i
);
1022 if (time
->weekdays
& 0xFE)
1024 fw3_pr(" %s--weekdays", hasbit(time
->weekdays
, 0) ? "! " : "");
1026 for (i
= 1, first
= true; i
< 8; i
++)
1028 if (hasbit(time
->weekdays
, i
))
1030 fw3_pr("%c%u", first
? ' ' : ',', i
);
1038 __fw3_format_comment(const char *comment
, ...)
1044 if (!comment
|| !*comment
)
1047 fw3_pr(" -m comment --comment \"");
1051 va_start(ap
, comment
);
1077 c
= va_arg(ap
, const char *);
1087 fw3_format_extra(const char *extra
)
1089 if (!extra
|| !*extra
)
1092 fw3_pr(" %s", extra
);