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 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
, limit_units
, 0, FW3_LIMIT_UNIT_DAY
))
204 fw3_parse_device(void *ptr
, const char *val
, bool is_list
)
206 struct fw3_device dev
= { };
212 put_value(ptr
, &dev
, sizeof(dev
), is_list
);
219 while (isspace(*++val
));
223 snprintf(dev
.name
, sizeof(dev
.name
), "%s", val
);
228 put_value(ptr
, &dev
, sizeof(dev
), is_list
);
233 fw3_parse_address(void *ptr
, const char *val
, bool is_list
)
235 struct fw3_address addr
= { };
244 while (isspace(*++val
));
252 if ((p
= strchr(s
, '/')) != NULL
)
255 m
= strtoul(p
, &e
, 10);
257 if ((e
== p
) || (*e
!= 0))
259 if (strchr(s
, ':') || !inet_pton(AF_INET
, p
, &v4
))
265 for (i
= 0, m
= 32; !(v4
.s_addr
& 1) && (i
< 32); i
++)
272 else if ((p
= strchr(s
, '-')) != NULL
)
276 if (inet_pton(AF_INET6
, p
, &v6
))
278 addr
.family
= FW3_FAMILY_V6
;
279 addr
.address2
.v6
= v6
;
282 else if (inet_pton(AF_INET
, p
, &v4
))
284 addr
.family
= FW3_FAMILY_V4
;
285 addr
.address2
.v4
= v4
;
295 if (inet_pton(AF_INET6
, s
, &v6
))
297 addr
.family
= FW3_FAMILY_V6
;
298 addr
.address
.v6
= v6
;
299 addr
.mask
= (m
>= 0) ? m
: 128;
301 else if (inet_pton(AF_INET
, s
, &v4
))
303 addr
.family
= FW3_FAMILY_V4
;
304 addr
.address
.v4
= v4
;
305 addr
.mask
= (m
>= 0) ? m
: 32;
315 put_value(ptr
, &addr
, sizeof(addr
), is_list
);
320 fw3_parse_network(void *ptr
, const char *val
, bool is_list
)
322 struct fw3_device dev
= { };
323 struct fw3_address
*addr
;
324 struct list_head
*addr_list
;
326 if (!fw3_parse_address(ptr
, val
, is_list
))
328 if (!fw3_parse_device(&dev
, val
, false))
331 addr_list
= fw3_ubus_address(dev
.name
);
335 list_for_each_entry(addr
, addr_list
, list
)
337 addr
->invert
= dev
.invert
;
339 if (!put_value(ptr
, addr
, sizeof(*addr
), is_list
))
343 fw3_ubus_address_free(addr_list
);
351 fw3_parse_mac(void *ptr
, const char *val
, bool is_list
)
353 struct fw3_mac addr
= { };
354 struct ether_addr
*mac
;
359 while (isspace(*++val
));
362 if ((mac
= ether_aton(val
)) != NULL
)
367 put_value(ptr
, &addr
, sizeof(addr
), is_list
);
375 fw3_parse_port(void *ptr
, const char *val
, bool is_list
)
377 struct fw3_port range
= { };
385 while (isspace(*++val
));
388 n
= strtoul(val
, &p
, 10);
390 if (errno
== ERANGE
|| errno
== EINVAL
)
393 if (*p
&& *p
!= '-' && *p
!= ':')
398 m
= strtoul(++p
, NULL
, 10);
400 if (errno
== ERANGE
|| errno
== EINVAL
|| m
< n
)
413 put_value(ptr
, &range
, sizeof(range
), is_list
);
418 fw3_parse_family(void *ptr
, const char *val
, bool is_list
)
420 if (!strcmp(val
, "any"))
421 *((enum fw3_family
*)ptr
) = FW3_FAMILY_ANY
;
422 else if (!strcmp(val
, "inet") || strrchr(val
, '4'))
423 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V4
;
424 else if (!strcmp(val
, "inet6") || strrchr(val
, '6'))
425 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V6
;
433 fw3_parse_icmptype(void *ptr
, const char *val
, bool is_list
)
435 struct fw3_icmptype icmp
= { };
441 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v4
); i
++)
443 if (!strcmp(val
, fw3_icmptype_list_v4
[i
].name
))
445 icmp
.type
= fw3_icmptype_list_v4
[i
].type
;
446 icmp
.code_min
= fw3_icmptype_list_v4
[i
].code_min
;
447 icmp
.code_max
= fw3_icmptype_list_v4
[i
].code_max
;
454 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v6
); i
++)
456 if (!strcmp(val
, fw3_icmptype_list_v6
[i
].name
))
458 icmp
.type6
= fw3_icmptype_list_v6
[i
].type
;
459 icmp
.code6_min
= fw3_icmptype_list_v6
[i
].code_min
;
460 icmp
.code6_max
= fw3_icmptype_list_v6
[i
].code_max
;
469 i
= strtoul(val
, &p
, 10);
471 if ((p
== val
) || (*p
!= '/' && *p
!= 0) || (i
> 0xFF))
479 i
= strtoul(val
, &p
, 10);
481 if ((p
== val
) || (*p
!= 0) || (i
> 0xFF))
490 icmp
.code_max
= 0xFF;
493 icmp
.type6
= icmp
.type
;
494 icmp
.code6_min
= icmp
.code_max
;
495 icmp
.code6_max
= icmp
.code_max
;
501 icmp
.family
= (v4
&& v6
) ? FW3_FAMILY_ANY
502 : (v6
? FW3_FAMILY_V6
: FW3_FAMILY_V4
);
504 put_value(ptr
, &icmp
, sizeof(icmp
), is_list
);
509 fw3_parse_protocol(void *ptr
, const char *val
, bool is_list
)
511 struct fw3_protocol proto
= { };
512 struct protoent
*ent
;
517 while (isspace(*++val
));
520 if (!strcmp(val
, "all"))
523 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
526 else if (!strcmp(val
, "icmpv6"))
530 else if (!strcmp(val
, "tcpudp"))
533 if (put_value(ptr
, &proto
, sizeof(proto
), is_list
))
536 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
542 ent
= getprotobyname(val
);
546 proto
.protocol
= ent
->p_proto
;
547 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
551 proto
.protocol
= strtoul(val
, NULL
, 10);
553 if (errno
== ERANGE
|| errno
== EINVAL
)
556 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
561 fw3_parse_ipset_method(void *ptr
, const char *val
, bool is_list
)
563 return parse_enum(ptr
, val
, &fw3_ipset_method_names
[FW3_IPSET_METHOD_BITMAP
],
564 FW3_IPSET_METHOD_BITMAP
, FW3_IPSET_METHOD_LIST
);
568 fw3_parse_ipset_datatype(void *ptr
, const char *val
, bool is_list
)
570 struct fw3_ipset_datatype type
= { };
572 if (!strncmp(val
, "dest_", 5))
577 else if (!strncmp(val
, "dst_", 4))
582 else if (!strncmp(val
, "src_", 4))
588 if (parse_enum(&type
.type
, val
, &fw3_ipset_type_names
[FW3_IPSET_TYPE_IP
],
589 FW3_IPSET_TYPE_IP
, FW3_IPSET_TYPE_SET
))
591 put_value(ptr
, &type
, sizeof(type
), is_list
);
599 fw3_parse_date(void *ptr
, const char *val
, bool is_list
)
601 unsigned int year
= 1970, mon
= 1, day
= 1, hour
= 0, min
= 0, sec
= 0;
602 struct tm tm
= { 0 };
605 year
= strtoul(val
, &p
, 10);
606 if ((*p
!= '-' && *p
) || year
< 1970 || year
> 2038)
611 mon
= strtoul(++p
, &p
, 10);
612 if ((*p
!= '-' && *p
) || mon
> 12)
617 day
= strtoul(++p
, &p
, 10);
618 if ((*p
!= 'T' && *p
) || day
> 31)
623 hour
= strtoul(++p
, &p
, 10);
624 if ((*p
!= ':' && *p
) || hour
> 23)
629 min
= strtoul(++p
, &p
, 10);
630 if ((*p
!= ':' && *p
) || min
> 59)
635 sec
= strtoul(++p
, &p
, 10);
640 tm
.tm_year
= year
- 1900;
647 if (mktime(&tm
) >= 0)
649 *((struct tm
*)ptr
) = tm
;
658 fw3_parse_time(void *ptr
, const char *val
, bool is_list
)
660 unsigned int hour
= 0, min
= 0, sec
= 0;
663 hour
= strtoul(val
, &p
, 10);
664 if (*p
!= ':' || hour
> 23)
667 min
= strtoul(++p
, &p
, 10);
668 if ((*p
!= ':' && *p
) || min
> 59)
673 sec
= strtoul(++p
, &p
, 10);
678 *((int *)ptr
) = 60 * 60 * hour
+ 60 * min
+ sec
;
686 fw3_parse_weekdays(void *ptr
, const char *val
, bool is_list
)
693 setbit(*(uint8_t *)ptr
, 0);
694 while (isspace(*++val
));
697 if (!(s
= strdup(val
)))
700 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
702 if (!parse_enum(&w
, p
, weekdays
, 1, 7))
704 w
= strtoul(p
, &p
, 10);
706 if (*p
|| w
< 1 || w
> 7)
713 setbit(*(uint8_t *)ptr
, w
);
721 fw3_parse_monthdays(void *ptr
, const char *val
, bool is_list
)
728 setbit(*(uint32_t *)ptr
, 0);
729 while (isspace(*++val
));
732 if (!(s
= strdup(val
)))
735 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
737 d
= strtoul(p
, &p
, 10);
739 if (*p
|| d
< 1 || d
> 31)
745 setbit(*(uint32_t *)ptr
, d
);
753 fw3_parse_include_type(void *ptr
, const char *val
, bool is_list
)
755 return parse_enum(ptr
, val
, include_types
,
756 FW3_INC_TYPE_SCRIPT
, FW3_INC_TYPE_RESTORE
);
760 fw3_parse_reflection_source(void *ptr
, const char *val
, bool is_list
)
762 return parse_enum(ptr
, val
, reflection_sources
,
763 FW3_REFLECTION_INTERNAL
, FW3_REFLECTION_EXTERNAL
);
767 fw3_parse_mark(void *ptr
, const char *val
, bool is_list
)
771 struct fw3_mark
*m
= ptr
;
776 while (isspace(*++val
));
779 if ((s
= strchr(val
, '/')) != NULL
)
782 n
= strtoul(val
, &e
, 0);
788 m
->mask
= 0xFFFFFFFF;
792 n
= strtoul(s
, &e
, 0);
806 fw3_parse_options(void *s
, const struct fw3_option
*opts
,
807 struct uci_section
*section
)
811 struct uci_element
*e
, *l
;
812 struct uci_option
*o
;
813 const struct fw3_option
*opt
;
814 struct list_head
*dest
;
816 uci_foreach_element(§ion
->options
, e
)
818 o
= uci_to_option(e
);
821 for (opt
= opts
; opt
->name
; opt
++)
826 if (strcmp(opt
->name
, e
->name
))
829 if (o
->type
== UCI_TYPE_LIST
)
833 warn_elem(e
, "must not be a list");
837 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
839 uci_foreach_element(&o
->v
.list
, l
)
844 if (!opt
->parse(dest
, l
->name
, true))
846 warn_elem(e
, "has invalid value '%s'", l
->name
);
861 if (!opt
->parse((char *)s
+ opt
->offset
, o
->v
.string
, false))
862 warn_elem(e
, "has invalid value '%s'", o
->v
.string
);
866 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
868 for (p
= strtok(v
, " \t"); p
!= NULL
; p
= strtok(NULL
, " \t"))
870 if (!opt
->parse(dest
, p
, true))
872 warn_elem(e
, "has invalid value '%s'", p
);
884 warn_elem(e
, "is unknown");
890 fw3_format_in_out(struct fw3_device
*in
, struct fw3_device
*out
)
893 fw3_pr(" %s-i %s", in
->invert
? "! " : "", in
->name
);
895 if (out
&& !out
->any
)
896 fw3_pr(" %s-o %s", out
->invert
? "! " : "", out
->name
);
900 fw3_address_to_string(struct fw3_address
*address
, bool allow_invert
)
902 char *p
, ip
[INET6_ADDRSTRLEN
];
903 static char buf
[INET6_ADDRSTRLEN
* 2 + 2];
907 if (address
->invert
&& allow_invert
)
908 p
+= sprintf(p
, "!");
910 inet_ntop(address
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
911 &address
->address
.v4
, ip
, sizeof(ip
));
913 p
+= sprintf(p
, "%s", ip
);
917 inet_ntop(address
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
918 &address
->address2
.v4
, ip
, sizeof(ip
));
920 p
+= sprintf(p
, "-%s", ip
);
924 p
+= sprintf(p
, "/%u", address
->mask
);
931 fw3_format_src_dest(struct fw3_address
*src
, struct fw3_address
*dest
)
933 if ((src
&& src
->range
) || (dest
&& dest
->range
))
934 fw3_pr(" -m iprange");
938 fw3_pr(" %s%s %s", src
->invert
? "! " : "",
939 src
->range
? "--src-range" : "-s",
940 fw3_address_to_string(src
, false));
943 if (dest
&& dest
->set
)
945 fw3_pr(" %s%s %s", dest
->invert
? "! " : "",
946 dest
->range
? "--dst-range" : "-d",
947 fw3_address_to_string(dest
, false));
952 fw3_format_sport_dport(struct fw3_port
*sp
, struct fw3_port
*dp
)
956 if (sp
->port_min
== sp
->port_max
)
957 fw3_pr(" %s--sport %u", sp
->invert
? "! " : "", sp
->port_min
);
959 fw3_pr(" %s--sport %u:%u",
960 sp
->invert
? "! " : "", sp
->port_min
, sp
->port_max
);
965 if (dp
->port_min
== dp
->port_max
)
966 fw3_pr(" %s--dport %u", dp
->invert
? "! " : "", dp
->port_min
);
968 fw3_pr(" %s--dport %u:%u",
969 dp
->invert
? "! " : "", dp
->port_min
, dp
->port_max
);
974 fw3_format_mac(struct fw3_mac
*mac
)
979 fw3_pr(" -m mac %s--mac-source %s",
980 mac
->invert
? "! " : "", ether_ntoa(&mac
->mac
));
984 fw3_format_protocol(struct fw3_protocol
*proto
, enum fw3_family family
)
991 pr
= proto
->protocol
;
993 if (pr
== 1 && family
== FW3_FAMILY_V6
)
999 fw3_pr(" %s-p %u", proto
->invert
? "! " : "", pr
);
1003 fw3_format_icmptype(struct fw3_icmptype
*icmp
, enum fw3_family family
)
1008 if (family
!= FW3_FAMILY_V6
)
1010 if (icmp
->code_min
== 0 && icmp
->code_max
== 0xFF)
1011 fw3_pr(" %s--icmp-type %u", icmp
->invert
? "! " : "", icmp
->type
);
1013 fw3_pr(" %s--icmp-type %u/%u",
1014 icmp
->invert
? "! " : "", icmp
->type
, icmp
->code_min
);
1018 if (icmp
->code6_min
== 0 && icmp
->code6_max
== 0xFF)
1019 fw3_pr(" %s--icmpv6-type %u", icmp
->invert
? "! " : "", icmp
->type6
);
1021 fw3_pr(" %s--icmpv6-type %u/%u",
1022 icmp
->invert
? "! " : "", icmp
->type6
, icmp
->code6_min
);
1027 fw3_format_limit(struct fw3_limit
*limit
)
1032 if (limit
->rate
> 0)
1034 fw3_pr(" -m limit %s--limit %u/%s",
1035 limit
->invert
? "! " : "",
1036 limit
->rate
, limit_units
[limit
->unit
]);
1038 if (limit
->burst
> 0)
1039 fw3_pr(" --limit-burst %u", limit
->burst
);
1044 fw3_format_ipset(struct fw3_ipset
*ipset
, bool invert
)
1047 const char *name
= NULL
;
1048 struct fw3_ipset_datatype
*type
;
1053 if (ipset
->external
&& *ipset
->external
)
1054 name
= ipset
->external
;
1058 fw3_pr(" -m set %s--match-set %s", invert
? "! " : "", name
);
1060 list_for_each_entry(type
, &ipset
->datatypes
, list
)
1062 fw3_pr("%c%s", first
? ' ' : ',', type
->dest
? "dst" : "src");
1068 fw3_format_time(struct fw3_time
*time
)
1071 struct tm empty
= { 0 };
1072 char buf
[sizeof("9999-99-99T23:59:59\0")];
1073 bool d1
= memcmp(&time
->datestart
, &empty
, sizeof(empty
));
1074 bool d2
= memcmp(&time
->datestop
, &empty
, sizeof(empty
));
1077 if (!d1
&& !d2
&& !time
->timestart
&& !time
->timestop
&&
1078 !(time
->monthdays
& 0xFFFFFFFE) && !(time
->weekdays
& 0xFE))
1090 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestart
);
1091 fw3_pr(" --datestart %s", buf
);
1096 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestop
);
1097 fw3_pr(" --datestop %s", buf
);
1100 if (time
->timestart
)
1102 fw3_pr(" --timestart %02d:%02d:%02d",
1103 time
->timestart
/ 3600,
1104 time
->timestart
% 3600 / 60,
1105 time
->timestart
% 60);
1110 fw3_pr(" --timestop %02d:%02d:%02d",
1111 time
->timestop
/ 3600,
1112 time
->timestop
% 3600 / 60,
1113 time
->timestop
% 60);
1116 if (time
->monthdays
& 0xFFFFFFFE)
1118 fw3_pr(" %s--monthdays", hasbit(time
->monthdays
, 0) ? "! " : "");
1120 for (i
= 1, first
= true; i
< 32; i
++)
1122 if (hasbit(time
->monthdays
, i
))
1124 fw3_pr("%c%u", first
? ' ' : ',', i
);
1130 if (time
->weekdays
& 0xFE)
1132 fw3_pr(" %s--weekdays", hasbit(time
->weekdays
, 0) ? "! " : "");
1134 for (i
= 1, first
= true; i
< 8; i
++)
1136 if (hasbit(time
->weekdays
, i
))
1138 fw3_pr("%c%u", first
? ' ' : ',', i
);
1146 fw3_format_mark(struct fw3_mark
*mark
)
1151 fw3_pr(" -m mark %s--mark 0x%x", mark
->invert
? "! " : "", mark
->mark
);
1153 if (mark
->mask
< 0xFFFFFFFF)
1154 fw3_pr("/0x%x", mark
->mask
);
1158 __fw3_format_comment(const char *comment
, ...)
1164 if (!comment
|| !*comment
)
1167 fw3_pr(" -m comment --comment \"");
1171 va_start(ap
, comment
);
1197 c
= va_arg(ap
, const char *);
1207 fw3_format_extra(const char *extra
)
1209 if (!extra
|| !*extra
)
1212 fw3_pr(" %s", extra
);