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 static const char *limit_units
[] = {
94 static const char *ipset_methods
[] = {
100 static const char *ipset_types
[] = {
108 static const char *weekdays
[] = {
118 static const char *include_types
[] = {
123 static const char *reflection_sources
[] = {
130 fw3_parse_bool(void *ptr
, const char *val
, bool is_list
)
132 if (!strcmp(val
, "true") || !strcmp(val
, "yes") || !strcmp(val
, "1"))
133 *((bool *)ptr
) = true;
135 *((bool *)ptr
) = false;
141 fw3_parse_int(void *ptr
, const char *val
, bool is_list
)
143 int n
= strtol(val
, NULL
, 10);
145 if (errno
== ERANGE
|| errno
== EINVAL
)
154 fw3_parse_string(void *ptr
, const char *val
, bool is_list
)
156 *((char **)ptr
) = (char *)val
;
161 fw3_parse_target(void *ptr
, const char *val
, bool is_list
)
163 return parse_enum(ptr
, val
, &fw3_flag_names
[FW3_FLAG_ACCEPT
],
164 FW3_FLAG_ACCEPT
, FW3_FLAG_SNAT
);
168 fw3_parse_limit(void *ptr
, const char *val
, bool is_list
)
170 struct fw3_limit
*limit
= ptr
;
171 enum fw3_limit_unit u
= FW3_LIMIT_UNIT_SECOND
;
177 limit
->invert
= true;
178 while (isspace(*++val
));
181 n
= strtol(val
, &e
, 10);
183 if (errno
== ERANGE
|| errno
== EINVAL
)
186 if (*e
&& *e
++ != '/')
192 if (!parse_enum(&u
, e
, limit_units
, 0, FW3_LIMIT_UNIT_DAY
))
202 fw3_parse_device(void *ptr
, const char *val
, bool is_list
)
204 struct fw3_device dev
= { };
210 put_value(ptr
, &dev
, sizeof(dev
), is_list
);
217 while (isspace(*++val
));
221 snprintf(dev
.name
, sizeof(dev
.name
), "%s", val
);
226 put_value(ptr
, &dev
, sizeof(dev
), is_list
);
231 fw3_parse_address(void *ptr
, const char *val
, bool is_list
)
233 struct fw3_address addr
= { };
242 while (isspace(*++val
));
250 if ((p
= strchr(s
, '/')) != NULL
)
253 m
= strtoul(p
, &e
, 10);
255 if ((e
== p
) || (*e
!= 0))
257 if (strchr(s
, ':') || !inet_pton(AF_INET
, p
, &v4
))
263 for (i
= 0, m
= 32; !(v4
.s_addr
& 1) && (i
< 32); i
++)
270 else if ((p
= strchr(s
, '-')) != NULL
)
274 if (inet_pton(AF_INET6
, p
, &v6
))
276 addr
.family
= FW3_FAMILY_V6
;
277 addr
.address2
.v6
= v6
;
280 else if (inet_pton(AF_INET
, p
, &v4
))
282 addr
.family
= FW3_FAMILY_V4
;
283 addr
.address2
.v4
= v4
;
293 if (inet_pton(AF_INET6
, s
, &v6
))
295 addr
.family
= FW3_FAMILY_V6
;
296 addr
.address
.v6
= v6
;
297 addr
.mask
= (m
>= 0) ? m
: 128;
299 else if (inet_pton(AF_INET
, s
, &v4
))
301 addr
.family
= FW3_FAMILY_V4
;
302 addr
.address
.v4
= v4
;
303 addr
.mask
= (m
>= 0) ? m
: 32;
313 put_value(ptr
, &addr
, sizeof(addr
), is_list
);
318 fw3_parse_network(void *ptr
, const char *val
, bool is_list
)
320 struct fw3_device dev
= { };
321 struct fw3_address
*addr
;
322 struct list_head
*addr_list
;
324 if (!fw3_parse_address(ptr
, val
, is_list
))
326 if (!fw3_parse_device(&dev
, val
, false))
329 addr_list
= fw3_ubus_address(dev
.name
);
333 list_for_each_entry(addr
, addr_list
, list
)
335 addr
->invert
= dev
.invert
;
337 if (!put_value(ptr
, addr
, sizeof(*addr
), is_list
))
341 fw3_ubus_address_free(addr_list
);
349 fw3_parse_mac(void *ptr
, const char *val
, bool is_list
)
351 struct fw3_mac addr
= { };
352 struct ether_addr
*mac
;
357 while (isspace(*++val
));
360 if ((mac
= ether_aton(val
)) != NULL
)
365 put_value(ptr
, &addr
, sizeof(addr
), is_list
);
373 fw3_parse_port(void *ptr
, const char *val
, bool is_list
)
375 struct fw3_port range
= { };
383 while (isspace(*++val
));
386 n
= strtoul(val
, &p
, 10);
388 if (errno
== ERANGE
|| errno
== EINVAL
)
391 if (*p
&& *p
!= '-' && *p
!= ':')
396 m
= strtoul(++p
, NULL
, 10);
398 if (errno
== ERANGE
|| errno
== EINVAL
|| m
< n
)
411 put_value(ptr
, &range
, sizeof(range
), is_list
);
416 fw3_parse_family(void *ptr
, const char *val
, bool is_list
)
418 if (!strcmp(val
, "any"))
419 *((enum fw3_family
*)ptr
) = FW3_FAMILY_ANY
;
420 else if (!strcmp(val
, "inet") || strrchr(val
, '4'))
421 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V4
;
422 else if (!strcmp(val
, "inet6") || strrchr(val
, '6'))
423 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V6
;
431 fw3_parse_icmptype(void *ptr
, const char *val
, bool is_list
)
433 struct fw3_icmptype icmp
= { };
439 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v4
); i
++)
441 if (!strcmp(val
, fw3_icmptype_list_v4
[i
].name
))
443 icmp
.type
= fw3_icmptype_list_v4
[i
].type
;
444 icmp
.code_min
= fw3_icmptype_list_v4
[i
].code_min
;
445 icmp
.code_max
= fw3_icmptype_list_v4
[i
].code_max
;
452 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v6
); i
++)
454 if (!strcmp(val
, fw3_icmptype_list_v6
[i
].name
))
456 icmp
.type6
= fw3_icmptype_list_v6
[i
].type
;
457 icmp
.code6_min
= fw3_icmptype_list_v6
[i
].code_min
;
458 icmp
.code6_max
= fw3_icmptype_list_v6
[i
].code_max
;
467 i
= strtoul(val
, &p
, 10);
469 if ((p
== val
) || (*p
!= '/' && *p
!= 0) || (i
> 0xFF))
477 i
= strtoul(val
, &p
, 10);
479 if ((p
== val
) || (*p
!= 0) || (i
> 0xFF))
488 icmp
.code_max
= 0xFF;
491 icmp
.type6
= icmp
.type
;
492 icmp
.code6_min
= icmp
.code_max
;
493 icmp
.code6_max
= icmp
.code_max
;
499 icmp
.family
= (v4
&& v6
) ? FW3_FAMILY_ANY
500 : (v6
? FW3_FAMILY_V6
: FW3_FAMILY_V4
);
502 put_value(ptr
, &icmp
, sizeof(icmp
), is_list
);
507 fw3_parse_protocol(void *ptr
, const char *val
, bool is_list
)
509 struct fw3_protocol proto
= { };
510 struct protoent
*ent
;
515 while (isspace(*++val
));
518 if (!strcmp(val
, "all"))
521 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
524 else if (!strcmp(val
, "icmpv6"))
528 else if (!strcmp(val
, "tcpudp"))
531 if (put_value(ptr
, &proto
, sizeof(proto
), is_list
))
534 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
540 ent
= getprotobyname(val
);
544 proto
.protocol
= ent
->p_proto
;
545 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
549 proto
.protocol
= strtoul(val
, NULL
, 10);
551 if (errno
== ERANGE
|| errno
== EINVAL
)
554 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
559 fw3_parse_ipset_method(void *ptr
, const char *val
, bool is_list
)
561 return parse_enum(ptr
, val
, ipset_methods
,
562 FW3_IPSET_METHOD_BITMAP
, FW3_IPSET_METHOD_LIST
);
566 fw3_parse_ipset_datatype(void *ptr
, const char *val
, bool is_list
)
568 struct fw3_ipset_datatype
*type
= ptr
;
570 if (!strncmp(val
, "dest_", 5))
575 else if (!strncmp(val
, "dst_", 4))
580 else if (!strncmp(val
, "src_", 4))
586 return parse_enum(&type
->type
, val
, ipset_types
,
587 FW3_IPSET_TYPE_IP
, FW3_IPSET_TYPE_SET
);
591 fw3_parse_date(void *ptr
, const char *val
, bool is_list
)
593 unsigned int year
= 1970, mon
= 1, day
= 1, hour
= 0, min
= 0, sec
= 0;
594 struct tm tm
= { 0 };
597 year
= strtoul(val
, &p
, 10);
598 if ((*p
!= '-' && *p
) || year
< 1970 || year
> 2038)
603 mon
= strtoul(++p
, &p
, 10);
604 if ((*p
!= '-' && *p
) || mon
> 12)
609 day
= strtoul(++p
, &p
, 10);
610 if ((*p
!= 'T' && *p
) || day
> 31)
615 hour
= strtoul(++p
, &p
, 10);
616 if ((*p
!= ':' && *p
) || hour
> 23)
621 min
= strtoul(++p
, &p
, 10);
622 if ((*p
!= ':' && *p
) || min
> 59)
627 sec
= strtoul(++p
, &p
, 10);
632 tm
.tm_year
= year
- 1900;
639 if (mktime(&tm
) >= 0)
641 *((struct tm
*)ptr
) = tm
;
650 fw3_parse_time(void *ptr
, const char *val
, bool is_list
)
652 unsigned int hour
= 0, min
= 0, sec
= 0;
655 hour
= strtoul(val
, &p
, 10);
656 if (*p
!= ':' || hour
> 23)
659 min
= strtoul(++p
, &p
, 10);
660 if ((*p
!= ':' && *p
) || min
> 59)
665 sec
= strtoul(++p
, &p
, 10);
670 *((int *)ptr
) = 60 * 60 * hour
+ 60 * min
+ sec
;
678 fw3_parse_weekdays(void *ptr
, const char *val
, bool is_list
)
685 setbit(*(uint8_t *)ptr
, 0);
686 while (isspace(*++val
));
689 if (!(s
= strdup(val
)))
692 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
694 if (!parse_enum(&w
, p
, weekdays
, 1, 7))
696 w
= strtoul(p
, &p
, 10);
698 if (*p
|| w
< 1 || w
> 7)
705 setbit(*(uint8_t *)ptr
, w
);
713 fw3_parse_monthdays(void *ptr
, const char *val
, bool is_list
)
720 setbit(*(uint32_t *)ptr
, 0);
721 while (isspace(*++val
));
724 if (!(s
= strdup(val
)))
727 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
729 d
= strtoul(p
, &p
, 10);
731 if (*p
|| d
< 1 || d
> 31)
737 setbit(*(uint32_t *)ptr
, d
);
745 fw3_parse_include_type(void *ptr
, const char *val
, bool is_list
)
747 return parse_enum(ptr
, val
, include_types
,
748 FW3_INC_TYPE_SCRIPT
, FW3_INC_TYPE_RESTORE
);
752 fw3_parse_reflection_source(void *ptr
, const char *val
, bool is_list
)
754 return parse_enum(ptr
, val
, reflection_sources
,
755 FW3_REFLECTION_INTERNAL
, FW3_REFLECTION_EXTERNAL
);
759 fw3_parse_mark(void *ptr
, const char *val
, bool is_list
)
763 struct fw3_mark
*m
= ptr
;
768 while (isspace(*++val
));
771 if ((s
= strchr(val
, '/')) != NULL
)
774 n
= strtoul(val
, &e
, 0);
780 m
->mask
= 0xFFFFFFFF;
784 n
= strtoul(s
, &e
, 0);
798 fw3_parse_options(void *s
, const struct fw3_option
*opts
,
799 struct uci_section
*section
)
803 struct uci_element
*e
, *l
;
804 struct uci_option
*o
;
805 const struct fw3_option
*opt
;
806 struct list_head
*dest
;
808 uci_foreach_element(§ion
->options
, e
)
810 o
= uci_to_option(e
);
813 for (opt
= opts
; opt
->name
; opt
++)
818 if (strcmp(opt
->name
, e
->name
))
821 if (o
->type
== UCI_TYPE_LIST
)
825 warn_elem(e
, "must not be a list");
829 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
831 uci_foreach_element(&o
->v
.list
, l
)
836 if (!opt
->parse(dest
, l
->name
, true))
838 warn_elem(e
, "has invalid value '%s'", l
->name
);
853 if (!opt
->parse((char *)s
+ opt
->offset
, o
->v
.string
, false))
854 warn_elem(e
, "has invalid value '%s'", o
->v
.string
);
858 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
860 for (p
= strtok(v
, " \t"); p
!= NULL
; p
= strtok(NULL
, " \t"))
862 if (!opt
->parse(dest
, p
, true))
864 warn_elem(e
, "has invalid value '%s'", p
);
876 warn_elem(e
, "is unknown");
882 fw3_format_in_out(struct fw3_device
*in
, struct fw3_device
*out
)
885 fw3_pr(" %s-i %s", in
->invert
? "! " : "", in
->name
);
887 if (out
&& !out
->any
)
888 fw3_pr(" %s-o %s", out
->invert
? "! " : "", out
->name
);
892 fw3_format_src_dest(struct fw3_address
*src
, struct fw3_address
*dest
)
894 char s
[INET6_ADDRSTRLEN
];
896 if ((src
&& src
->range
) || (dest
&& dest
->range
))
897 fw3_pr(" -m iprange");
903 inet_ntop(src
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
904 &src
->address
.v4
, s
, sizeof(s
));
906 fw3_pr(" %s--src-range %s", src
->invert
? "! " : "", s
);
908 inet_ntop(src
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
909 &src
->address2
.v4
, s
, sizeof(s
));
915 inet_ntop(src
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
916 &src
->address
.v4
, s
, sizeof(s
));
918 fw3_pr(" %s-s %s/%u", src
->invert
? "! " : "", s
, src
->mask
);
922 if (dest
&& dest
->set
)
926 inet_ntop(dest
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
927 &dest
->address
.v4
, s
, sizeof(s
));
929 fw3_pr(" %s--dst-range %s", dest
->invert
? "! " : "", s
);
931 inet_ntop(dest
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
932 &dest
->address2
.v4
, s
, sizeof(s
));
938 inet_ntop(dest
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
939 &dest
->address
.v4
, s
, sizeof(s
));
941 fw3_pr(" %s-d %s/%u", dest
->invert
? "! " : "", s
, dest
->mask
);
947 fw3_format_sport_dport(struct fw3_port
*sp
, struct fw3_port
*dp
)
951 if (sp
->port_min
== sp
->port_max
)
952 fw3_pr(" %s--sport %u", sp
->invert
? "! " : "", sp
->port_min
);
954 fw3_pr(" %s--sport %u:%u",
955 sp
->invert
? "! " : "", sp
->port_min
, sp
->port_max
);
960 if (dp
->port_min
== dp
->port_max
)
961 fw3_pr(" %s--dport %u", dp
->invert
? "! " : "", dp
->port_min
);
963 fw3_pr(" %s--dport %u:%u",
964 dp
->invert
? "! " : "", dp
->port_min
, dp
->port_max
);
969 fw3_format_mac(struct fw3_mac
*mac
)
974 fw3_pr(" -m mac %s--mac-source %s",
975 mac
->invert
? "! " : "", ether_ntoa(&mac
->mac
));
979 fw3_format_protocol(struct fw3_protocol
*proto
, enum fw3_family family
)
986 pr
= proto
->protocol
;
988 if (pr
== 1 && family
== FW3_FAMILY_V6
)
994 fw3_pr(" %s-p %u", proto
->invert
? "! " : "", pr
);
998 fw3_format_icmptype(struct fw3_icmptype
*icmp
, enum fw3_family family
)
1003 if (family
!= FW3_FAMILY_V6
)
1005 if (icmp
->code_min
== 0 && icmp
->code_max
== 0xFF)
1006 fw3_pr(" %s--icmp-type %u", icmp
->invert
? "! " : "", icmp
->type
);
1008 fw3_pr(" %s--icmp-type %u/%u",
1009 icmp
->invert
? "! " : "", icmp
->type
, icmp
->code_min
);
1013 if (icmp
->code6_min
== 0 && icmp
->code6_max
== 0xFF)
1014 fw3_pr(" %s--icmpv6-type %u", icmp
->invert
? "! " : "", icmp
->type6
);
1016 fw3_pr(" %s--icmpv6-type %u/%u",
1017 icmp
->invert
? "! " : "", icmp
->type6
, icmp
->code6_min
);
1022 fw3_format_limit(struct fw3_limit
*limit
)
1027 if (limit
->rate
> 0)
1029 fw3_pr(" -m limit %s--limit %u/%s",
1030 limit
->invert
? "! " : "",
1031 limit
->rate
, limit_units
[limit
->unit
]);
1033 if (limit
->burst
> 0)
1034 fw3_pr(" --limit-burst %u", limit
->burst
);
1039 fw3_format_ipset(struct fw3_ipset
*ipset
, bool invert
)
1042 const char *name
= NULL
;
1043 struct fw3_ipset_datatype
*type
;
1048 if (ipset
->external
&& *ipset
->external
)
1049 name
= ipset
->external
;
1053 fw3_pr(" -m set %s--match-set %s", invert
? "! " : "", name
);
1055 list_for_each_entry(type
, &ipset
->datatypes
, list
)
1057 fw3_pr("%c%s", first
? ' ' : ',', type
->dest
? "dst" : "src");
1063 fw3_format_time(struct fw3_time
*time
)
1066 struct tm empty
= { 0 };
1067 char buf
[sizeof("9999-99-99T23:59:59\0")];
1068 bool d1
= memcmp(&time
->datestart
, &empty
, sizeof(empty
));
1069 bool d2
= memcmp(&time
->datestop
, &empty
, sizeof(empty
));
1072 if (!d1
&& !d2
&& !time
->timestart
&& !time
->timestop
&&
1073 !(time
->monthdays
& 0xFFFFFFFE) && !(time
->weekdays
& 0xFE))
1085 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestart
);
1086 fw3_pr(" --datestart %s", buf
);
1091 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestop
);
1092 fw3_pr(" --datestop %s", buf
);
1095 if (time
->timestart
)
1097 fw3_pr(" --timestart %02d:%02d:%02d",
1098 time
->timestart
/ 3600,
1099 time
->timestart
% 3600 / 60,
1100 time
->timestart
% 60);
1105 fw3_pr(" --timestop %02d:%02d:%02d",
1106 time
->timestop
/ 3600,
1107 time
->timestop
% 3600 / 60,
1108 time
->timestop
% 60);
1111 if (time
->monthdays
& 0xFFFFFFFE)
1113 fw3_pr(" %s--monthdays", hasbit(time
->monthdays
, 0) ? "! " : "");
1115 for (i
= 1, first
= true; i
< 32; i
++)
1117 if (hasbit(time
->monthdays
, i
))
1119 fw3_pr("%c%u", first
? ' ' : ',', i
);
1125 if (time
->weekdays
& 0xFE)
1127 fw3_pr(" %s--weekdays", hasbit(time
->weekdays
, 0) ? "! " : "");
1129 for (i
= 1, first
= true; i
< 8; i
++)
1131 if (hasbit(time
->weekdays
, i
))
1133 fw3_pr("%c%u", first
? ' ' : ',', i
);
1141 fw3_format_mark(struct fw3_mark
*mark
)
1146 fw3_pr(" -m mark %s--mark 0x%x", mark
->invert
? "! " : "", mark
->mark
);
1148 if (mark
->mask
< 0xFFFFFFFF)
1149 fw3_pr("/0x%x", mark
->mask
);
1153 __fw3_format_comment(const char *comment
, ...)
1159 if (!comment
|| !*comment
)
1162 fw3_pr(" -m comment --comment \"");
1166 va_start(ap
, comment
);
1192 c
= va_arg(ap
, const char *);
1202 fw3_format_extra(const char *extra
)
1204 if (!extra
|| !*extra
)
1207 fw3_pr(" %s", extra
);