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
)
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
;
346 if (!put_value(ptr
, addr
, sizeof(*addr
), is_list
))
350 fw3_ubus_address_free(addr_list
);
358 fw3_parse_mac(void *ptr
, const char *val
, bool is_list
)
360 struct fw3_mac addr
= { };
361 struct ether_addr
*mac
;
366 while (isspace(*++val
));
369 if ((mac
= ether_aton(val
)) != NULL
)
374 put_value(ptr
, &addr
, sizeof(addr
), is_list
);
382 fw3_parse_port(void *ptr
, const char *val
, bool is_list
)
384 struct fw3_port range
= { };
392 while (isspace(*++val
));
395 n
= strtoul(val
, &p
, 10);
397 if (errno
== ERANGE
|| errno
== EINVAL
)
400 if (*p
&& *p
!= '-' && *p
!= ':')
405 m
= strtoul(++p
, NULL
, 10);
407 if (errno
== ERANGE
|| errno
== EINVAL
|| m
< n
)
420 put_value(ptr
, &range
, sizeof(range
), is_list
);
425 fw3_parse_family(void *ptr
, const char *val
, bool is_list
)
427 if (!strcmp(val
, "any"))
428 *((enum fw3_family
*)ptr
) = FW3_FAMILY_ANY
;
429 else if (!strcmp(val
, "inet") || strrchr(val
, '4'))
430 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V4
;
431 else if (!strcmp(val
, "inet6") || strrchr(val
, '6'))
432 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V6
;
440 fw3_parse_icmptype(void *ptr
, const char *val
, bool is_list
)
442 struct fw3_icmptype icmp
= { };
448 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v4
); i
++)
450 if (!strcmp(val
, fw3_icmptype_list_v4
[i
].name
))
452 icmp
.type
= fw3_icmptype_list_v4
[i
].type
;
453 icmp
.code_min
= fw3_icmptype_list_v4
[i
].code_min
;
454 icmp
.code_max
= fw3_icmptype_list_v4
[i
].code_max
;
461 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v6
); i
++)
463 if (!strcmp(val
, fw3_icmptype_list_v6
[i
].name
))
465 icmp
.type6
= fw3_icmptype_list_v6
[i
].type
;
466 icmp
.code6_min
= fw3_icmptype_list_v6
[i
].code_min
;
467 icmp
.code6_max
= fw3_icmptype_list_v6
[i
].code_max
;
476 i
= strtoul(val
, &p
, 10);
478 if ((p
== val
) || (*p
!= '/' && *p
!= 0) || (i
> 0xFF))
486 i
= strtoul(val
, &p
, 10);
488 if ((p
== val
) || (*p
!= 0) || (i
> 0xFF))
497 icmp
.code_max
= 0xFF;
500 icmp
.type6
= icmp
.type
;
501 icmp
.code6_min
= icmp
.code_max
;
502 icmp
.code6_max
= icmp
.code_max
;
508 icmp
.family
= (v4
&& v6
) ? FW3_FAMILY_ANY
509 : (v6
? FW3_FAMILY_V6
: FW3_FAMILY_V4
);
511 put_value(ptr
, &icmp
, sizeof(icmp
), is_list
);
516 fw3_parse_protocol(void *ptr
, const char *val
, bool is_list
)
518 struct fw3_protocol proto
= { };
519 struct protoent
*ent
;
524 while (isspace(*++val
));
527 if (!strcmp(val
, "all"))
530 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
533 else if (!strcmp(val
, "icmpv6"))
537 else if (!strcmp(val
, "tcpudp"))
540 if (put_value(ptr
, &proto
, sizeof(proto
), is_list
))
543 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
549 ent
= getprotobyname(val
);
553 proto
.protocol
= ent
->p_proto
;
554 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
558 proto
.protocol
= strtoul(val
, NULL
, 10);
560 if (errno
== ERANGE
|| errno
== EINVAL
)
563 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
568 fw3_parse_ipset_method(void *ptr
, const char *val
, bool is_list
)
570 return parse_enum(ptr
, val
, &fw3_ipset_method_names
[FW3_IPSET_METHOD_BITMAP
],
571 FW3_IPSET_METHOD_BITMAP
, FW3_IPSET_METHOD_LIST
);
575 fw3_parse_ipset_datatype(void *ptr
, const char *val
, bool is_list
)
577 struct fw3_ipset_datatype type
= { };
579 if (!strncmp(val
, "dest_", 5))
584 else if (!strncmp(val
, "dst_", 4))
589 else if (!strncmp(val
, "src_", 4))
595 if (parse_enum(&type
.type
, val
, &fw3_ipset_type_names
[FW3_IPSET_TYPE_IP
],
596 FW3_IPSET_TYPE_IP
, FW3_IPSET_TYPE_SET
))
598 put_value(ptr
, &type
, sizeof(type
), is_list
);
606 fw3_parse_date(void *ptr
, const char *val
, bool is_list
)
608 unsigned int year
= 1970, mon
= 1, day
= 1, hour
= 0, min
= 0, sec
= 0;
609 struct tm tm
= { 0 };
612 year
= strtoul(val
, &p
, 10);
613 if ((*p
!= '-' && *p
) || year
< 1970 || year
> 2038)
618 mon
= strtoul(++p
, &p
, 10);
619 if ((*p
!= '-' && *p
) || mon
> 12)
624 day
= strtoul(++p
, &p
, 10);
625 if ((*p
!= 'T' && *p
) || day
> 31)
630 hour
= strtoul(++p
, &p
, 10);
631 if ((*p
!= ':' && *p
) || hour
> 23)
636 min
= strtoul(++p
, &p
, 10);
637 if ((*p
!= ':' && *p
) || min
> 59)
642 sec
= strtoul(++p
, &p
, 10);
647 tm
.tm_year
= year
- 1900;
654 if (mktime(&tm
) >= 0)
656 *((struct tm
*)ptr
) = tm
;
665 fw3_parse_time(void *ptr
, const char *val
, bool is_list
)
667 unsigned int hour
= 0, min
= 0, sec
= 0;
670 hour
= strtoul(val
, &p
, 10);
671 if (*p
!= ':' || hour
> 23)
674 min
= strtoul(++p
, &p
, 10);
675 if ((*p
!= ':' && *p
) || min
> 59)
680 sec
= strtoul(++p
, &p
, 10);
685 *((int *)ptr
) = 60 * 60 * hour
+ 60 * min
+ sec
;
693 fw3_parse_weekdays(void *ptr
, const char *val
, bool is_list
)
700 setbit(*(uint8_t *)ptr
, 0);
701 while (isspace(*++val
));
704 if (!(s
= strdup(val
)))
707 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
709 if (!parse_enum(&w
, p
, weekdays
, 1, 7))
711 w
= strtoul(p
, &p
, 10);
713 if (*p
|| w
< 1 || w
> 7)
720 setbit(*(uint8_t *)ptr
, w
);
728 fw3_parse_monthdays(void *ptr
, const char *val
, bool is_list
)
735 setbit(*(uint32_t *)ptr
, 0);
736 while (isspace(*++val
));
739 if (!(s
= strdup(val
)))
742 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
744 d
= strtoul(p
, &p
, 10);
746 if (*p
|| d
< 1 || d
> 31)
752 setbit(*(uint32_t *)ptr
, d
);
760 fw3_parse_include_type(void *ptr
, const char *val
, bool is_list
)
762 return parse_enum(ptr
, val
, include_types
,
763 FW3_INC_TYPE_SCRIPT
, FW3_INC_TYPE_RESTORE
);
767 fw3_parse_reflection_source(void *ptr
, const char *val
, bool is_list
)
769 return parse_enum(ptr
, val
, reflection_sources
,
770 FW3_REFLECTION_INTERNAL
, FW3_REFLECTION_EXTERNAL
);
774 fw3_parse_mark(void *ptr
, const char *val
, bool is_list
)
778 struct fw3_mark
*m
= ptr
;
783 while (isspace(*++val
));
786 if ((s
= strchr(val
, '/')) != NULL
)
789 n
= strtoul(val
, &e
, 0);
795 m
->mask
= 0xFFFFFFFF;
799 n
= strtoul(s
, &e
, 0);
813 fw3_parse_options(void *s
, const struct fw3_option
*opts
,
814 struct uci_section
*section
)
818 struct uci_element
*e
, *l
;
819 struct uci_option
*o
;
820 const struct fw3_option
*opt
;
821 struct list_head
*dest
;
823 uci_foreach_element(§ion
->options
, e
)
825 o
= uci_to_option(e
);
828 for (opt
= opts
; opt
->name
; opt
++)
833 if (strcmp(opt
->name
, e
->name
))
836 if (o
->type
== UCI_TYPE_LIST
)
840 warn_elem(e
, "must not be a list");
844 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
846 uci_foreach_element(&o
->v
.list
, l
)
851 if (!opt
->parse(dest
, l
->name
, true))
853 warn_elem(e
, "has invalid value '%s'", l
->name
);
868 if (!opt
->parse((char *)s
+ opt
->offset
, o
->v
.string
, false))
869 warn_elem(e
, "has invalid value '%s'", o
->v
.string
);
873 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
875 for (p
= strtok(v
, " \t"); p
!= NULL
; p
= strtok(NULL
, " \t"))
877 if (!opt
->parse(dest
, p
, true))
879 warn_elem(e
, "has invalid value '%s'", p
);
891 warn_elem(e
, "is unknown");
897 fw3_format_in_out(struct fw3_device
*in
, struct fw3_device
*out
)
900 fw3_pr(" %s-i %s", in
->invert
? "! " : "", in
->name
);
902 if (out
&& !out
->any
)
903 fw3_pr(" %s-o %s", out
->invert
? "! " : "", out
->name
);
907 fw3_address_to_string(struct fw3_address
*address
, bool allow_invert
)
909 char *p
, ip
[INET6_ADDRSTRLEN
];
910 static char buf
[INET6_ADDRSTRLEN
* 2 + 2];
914 if (address
->invert
&& allow_invert
)
915 p
+= sprintf(p
, "!");
917 inet_ntop(address
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
918 &address
->address
.v4
, ip
, sizeof(ip
));
920 p
+= sprintf(p
, "%s", ip
);
924 inet_ntop(address
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
925 &address
->address2
.v4
, ip
, sizeof(ip
));
927 p
+= sprintf(p
, "-%s", ip
);
931 p
+= sprintf(p
, "/%u", address
->mask
);
938 fw3_format_src_dest(struct fw3_address
*src
, struct fw3_address
*dest
)
940 if ((src
&& src
->range
) || (dest
&& dest
->range
))
941 fw3_pr(" -m iprange");
945 fw3_pr(" %s%s %s", src
->invert
? "! " : "",
946 src
->range
? "--src-range" : "-s",
947 fw3_address_to_string(src
, false));
950 if (dest
&& dest
->set
)
952 fw3_pr(" %s%s %s", dest
->invert
? "! " : "",
953 dest
->range
? "--dst-range" : "-d",
954 fw3_address_to_string(dest
, false));
959 fw3_format_sport_dport(struct fw3_port
*sp
, struct fw3_port
*dp
)
963 if (sp
->port_min
== sp
->port_max
)
964 fw3_pr(" %s--sport %u", sp
->invert
? "! " : "", sp
->port_min
);
966 fw3_pr(" %s--sport %u:%u",
967 sp
->invert
? "! " : "", sp
->port_min
, sp
->port_max
);
972 if (dp
->port_min
== dp
->port_max
)
973 fw3_pr(" %s--dport %u", dp
->invert
? "! " : "", dp
->port_min
);
975 fw3_pr(" %s--dport %u:%u",
976 dp
->invert
? "! " : "", dp
->port_min
, dp
->port_max
);
981 fw3_format_mac(struct fw3_mac
*mac
)
986 fw3_pr(" -m mac %s--mac-source %s",
987 mac
->invert
? "! " : "", ether_ntoa(&mac
->mac
));
991 fw3_format_protocol(struct fw3_protocol
*proto
, enum fw3_family family
)
998 pr
= proto
->protocol
;
1000 if (pr
== 1 && family
== FW3_FAMILY_V6
)
1006 fw3_pr(" %s-p %u", proto
->invert
? "! " : "", pr
);
1010 fw3_format_icmptype(struct fw3_icmptype
*icmp
, enum fw3_family family
)
1015 if (family
!= FW3_FAMILY_V6
)
1017 if (icmp
->code_min
== 0 && icmp
->code_max
== 0xFF)
1018 fw3_pr(" %s--icmp-type %u", icmp
->invert
? "! " : "", icmp
->type
);
1020 fw3_pr(" %s--icmp-type %u/%u",
1021 icmp
->invert
? "! " : "", icmp
->type
, icmp
->code_min
);
1025 if (icmp
->code6_min
== 0 && icmp
->code6_max
== 0xFF)
1026 fw3_pr(" %s--icmpv6-type %u", icmp
->invert
? "! " : "", icmp
->type6
);
1028 fw3_pr(" %s--icmpv6-type %u/%u",
1029 icmp
->invert
? "! " : "", icmp
->type6
, icmp
->code6_min
);
1034 fw3_format_limit(struct fw3_limit
*limit
)
1039 if (limit
->rate
> 0)
1041 fw3_pr(" -m limit %s--limit %u/%s",
1042 limit
->invert
? "! " : "",
1043 limit
->rate
, limit_units
[limit
->unit
]);
1045 if (limit
->burst
> 0)
1046 fw3_pr(" --limit-burst %u", limit
->burst
);
1051 fw3_format_ipset(struct fw3_ipset
*ipset
, bool invert
)
1054 const char *name
= NULL
;
1055 struct fw3_ipset_datatype
*type
;
1060 name
= ipset
->external
? ipset
->external
: ipset
->name
;
1062 fw3_pr(" -m set %s--match-set %s", invert
? "! " : "", name
);
1064 list_for_each_entry(type
, &ipset
->datatypes
, list
)
1066 fw3_pr("%c%s", first
? ' ' : ',', type
->dest
? "dst" : "src");
1072 fw3_format_time(struct fw3_time
*time
)
1075 struct tm empty
= { 0 };
1076 char buf
[sizeof("9999-99-99T23:59:59\0")];
1077 bool d1
= memcmp(&time
->datestart
, &empty
, sizeof(empty
));
1078 bool d2
= memcmp(&time
->datestop
, &empty
, sizeof(empty
));
1081 if (!d1
&& !d2
&& !time
->timestart
&& !time
->timestop
&&
1082 !(time
->monthdays
& 0xFFFFFFFE) && !(time
->weekdays
& 0xFE))
1094 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestart
);
1095 fw3_pr(" --datestart %s", buf
);
1100 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestop
);
1101 fw3_pr(" --datestop %s", buf
);
1104 if (time
->timestart
)
1106 fw3_pr(" --timestart %02d:%02d:%02d",
1107 time
->timestart
/ 3600,
1108 time
->timestart
% 3600 / 60,
1109 time
->timestart
% 60);
1114 fw3_pr(" --timestop %02d:%02d:%02d",
1115 time
->timestop
/ 3600,
1116 time
->timestop
% 3600 / 60,
1117 time
->timestop
% 60);
1120 if (time
->monthdays
& 0xFFFFFFFE)
1122 fw3_pr(" %s--monthdays", hasbit(time
->monthdays
, 0) ? "! " : "");
1124 for (i
= 1, first
= true; i
< 32; i
++)
1126 if (hasbit(time
->monthdays
, i
))
1128 fw3_pr("%c%u", first
? ' ' : ',', i
);
1134 if (time
->weekdays
& 0xFE)
1136 fw3_pr(" %s--weekdays", hasbit(time
->weekdays
, 0) ? "! " : "");
1138 for (i
= 1, first
= true; i
< 8; i
++)
1140 if (hasbit(time
->weekdays
, i
))
1142 fw3_pr("%c%u", first
? ' ' : ',', i
);
1150 fw3_format_mark(struct fw3_mark
*mark
)
1155 fw3_pr(" -m mark %s--mark 0x%x", mark
->invert
? "! " : "", mark
->mark
);
1157 if (mark
->mask
< 0xFFFFFFFF)
1158 fw3_pr("/0x%x", mark
->mask
);
1162 __fw3_format_comment(const char *comment
, ...)
1168 if (!comment
|| !*comment
)
1171 fw3_pr(" -m comment --comment \"");
1175 va_start(ap
, comment
);
1201 c
= va_arg(ap
, const char *);
1211 fw3_format_extra(const char *extra
)
1213 if (!extra
|| !*extra
)
1216 fw3_pr(" %s", extra
);