2 * firewall3 - 3rd OpenWrt UCI firewall implementation
4 * Copyright (C) 2013-2014 Jo-Philipp Wich <jo@mein.io>
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
] = {
88 const char *fw3_limit_units
[__FW3_LIMIT_UNIT_MAX
] = {
95 const char *fw3_ipset_method_names
[__FW3_IPSET_METHOD_MAX
] = {
102 const char *fw3_ipset_type_names
[__FW3_IPSET_TYPE_MAX
] = {
111 static const char *weekdays
[] = {
121 static const char *include_types
[] = {
126 static const char *reflection_sources
[] = {
133 fw3_parse_bool(void *ptr
, const char *val
, bool is_list
)
135 if (!strcmp(val
, "true") || !strcmp(val
, "yes") || !strcmp(val
, "1"))
136 *((bool *)ptr
) = true;
138 *((bool *)ptr
) = false;
144 fw3_parse_int(void *ptr
, const char *val
, bool is_list
)
147 int n
= strtol(val
, &e
, 0);
158 fw3_parse_string(void *ptr
, const char *val
, bool is_list
)
160 *((char **)ptr
) = (char *)val
;
165 fw3_parse_target(void *ptr
, const char *val
, bool is_list
)
167 return parse_enum(ptr
, val
, &fw3_flag_names
[FW3_FLAG_ACCEPT
],
168 FW3_FLAG_ACCEPT
, FW3_FLAG_MASQUERADE
);
172 fw3_parse_limit(void *ptr
, const char *val
, bool is_list
)
174 struct fw3_limit
*limit
= ptr
;
175 enum fw3_limit_unit u
= FW3_LIMIT_UNIT_SECOND
;
181 limit
->invert
= true;
182 while (isspace(*++val
));
185 n
= strtol(val
, &e
, 10);
187 if (errno
== ERANGE
|| errno
== EINVAL
)
190 if (*e
&& *e
++ != '/')
196 if (!parse_enum(&u
, e
, fw3_limit_units
, 0, FW3_LIMIT_UNIT_DAY
))
206 fw3_parse_device(void *ptr
, const char *val
, bool is_list
)
209 struct fw3_device dev
= { };
215 put_value(ptr
, &dev
, sizeof(dev
), is_list
);
222 while (isspace(*++val
));
225 if ((p
= strchr(val
, '@')) != NULL
)
228 snprintf(dev
.network
, sizeof(dev
.network
), "%s", p
);
232 snprintf(dev
.name
, sizeof(dev
.name
), "%s", val
);
237 put_value(ptr
, &dev
, sizeof(dev
), is_list
);
242 fw3_parse_address(void *ptr
, const char *val
, bool is_list
)
244 struct fw3_address addr
= { };
247 char *p
= NULL
, *m
= NULL
, *s
, *e
;
253 while (isspace(*++val
));
261 if ((m
= strchr(s
, '/')) != NULL
)
263 else if ((p
= strchr(s
, '-')) != NULL
)
266 if (inet_pton(AF_INET6
, s
, &v6
))
268 addr
.family
= FW3_FAMILY_V6
;
269 addr
.address
.v6
= v6
;
273 if (!inet_pton(AF_INET6
, m
, &v6
))
275 bits
= strtol(m
, &e
, 10);
277 if ((*e
!= 0) || !fw3_bitlen2netmask(addr
.family
, bits
, &v6
))
285 if (!inet_pton(AF_INET6
, p
, &addr
.mask
.v6
))
292 memset(addr
.mask
.v6
.s6_addr
, 0xFF, 16);
295 else if (inet_pton(AF_INET
, s
, &v4
))
297 addr
.family
= FW3_FAMILY_V4
;
298 addr
.address
.v4
= v4
;
302 if (!inet_pton(AF_INET
, m
, &v4
))
304 bits
= strtol(m
, &e
, 10);
306 if ((*e
!= 0) || !fw3_bitlen2netmask(addr
.family
, bits
, &v4
))
314 if (!inet_pton(AF_INET
, p
, &addr
.mask
.v4
))
321 addr
.mask
.v4
.s_addr
= 0xFFFFFFFF;
331 put_value(ptr
, &addr
, sizeof(addr
), is_list
);
340 fw3_parse_network(void *ptr
, const char *val
, bool is_list
)
342 struct fw3_device dev
= { };
343 struct fw3_address
*addr
, *tmp
;
344 LIST_HEAD(addr_list
);
347 if (!fw3_parse_address(ptr
, val
, is_list
))
349 if (!fw3_parse_device(&dev
, val
, false))
352 n_addrs
= fw3_ubus_address(&addr_list
, dev
.name
);
354 list_for_each_entry(addr
, &addr_list
, list
)
356 addr
->invert
= dev
.invert
;
357 addr
->resolved
= true;
360 /* add an empty address member with .set = false, .resolved = true
361 * to signal resolving failure to callers */
364 tmp
= fw3_alloc(sizeof(*tmp
));
365 tmp
->resolved
= true;
367 list_add_tail(&tmp
->list
, &addr_list
);
372 list_splice_tail(&addr_list
, ptr
);
374 else if (!list_empty(&addr_list
))
376 memcpy(ptr
, list_first_entry(&addr_list
, typeof(*addr
), list
),
379 list_for_each_entry_safe(addr
, tmp
, &addr_list
, list
)
388 fw3_parse_mac(void *ptr
, const char *val
, bool is_list
)
390 struct fw3_mac addr
= { };
391 struct ether_addr
*mac
;
396 while (isspace(*++val
));
399 if ((mac
= ether_aton(val
)) != NULL
)
404 put_value(ptr
, &addr
, sizeof(addr
), is_list
);
412 fw3_parse_port(void *ptr
, const char *val
, bool is_list
)
414 struct fw3_port range
= { };
422 while (isspace(*++val
));
425 n
= strtoul(val
, &p
, 10);
427 if (errno
== ERANGE
|| errno
== EINVAL
)
430 if (*p
&& *p
!= '-' && *p
!= ':')
435 m
= strtoul(++p
, NULL
, 10);
437 if (errno
== ERANGE
|| errno
== EINVAL
|| m
< n
)
450 put_value(ptr
, &range
, sizeof(range
), is_list
);
455 fw3_parse_family(void *ptr
, const char *val
, bool is_list
)
457 if (!strcmp(val
, "any") || !strcmp(val
, "*"))
458 *((enum fw3_family
*)ptr
) = FW3_FAMILY_ANY
;
459 else if (!strcmp(val
, "inet") || strrchr(val
, '4'))
460 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V4
;
461 else if (!strcmp(val
, "inet6") || strrchr(val
, '6'))
462 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V6
;
470 fw3_parse_icmptype(void *ptr
, const char *val
, bool is_list
)
472 struct fw3_icmptype icmp
= { };
478 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v4
); i
++)
480 if (!strcmp(val
, fw3_icmptype_list_v4
[i
].name
))
482 icmp
.type
= fw3_icmptype_list_v4
[i
].type
;
483 icmp
.code_min
= fw3_icmptype_list_v4
[i
].code_min
;
484 icmp
.code_max
= fw3_icmptype_list_v4
[i
].code_max
;
491 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v6
); i
++)
493 if (!strcmp(val
, fw3_icmptype_list_v6
[i
].name
))
495 icmp
.type6
= fw3_icmptype_list_v6
[i
].type
;
496 icmp
.code6_min
= fw3_icmptype_list_v6
[i
].code_min
;
497 icmp
.code6_max
= fw3_icmptype_list_v6
[i
].code_max
;
506 i
= strtoul(val
, &p
, 10);
508 if ((p
== val
) || (*p
!= '/' && *p
!= 0) || (i
> 0xFF))
516 i
= strtoul(val
, &p
, 10);
518 if ((p
== val
) || (*p
!= 0) || (i
> 0xFF))
527 icmp
.code_max
= 0xFF;
530 icmp
.type6
= icmp
.type
;
531 icmp
.code6_min
= icmp
.code_max
;
532 icmp
.code6_max
= icmp
.code_max
;
538 icmp
.family
= (v4
&& v6
) ? FW3_FAMILY_ANY
539 : (v6
? FW3_FAMILY_V6
: FW3_FAMILY_V4
);
541 put_value(ptr
, &icmp
, sizeof(icmp
), is_list
);
546 fw3_parse_protocol(void *ptr
, const char *val
, bool is_list
)
548 struct fw3_protocol proto
= { };
549 struct protoent
*ent
;
555 while (isspace(*++val
));
558 if (!strcmp(val
, "all") || !strcmp(val
, "any") || !strcmp(val
, "*"))
561 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
564 else if (!strcmp(val
, "icmpv6"))
568 else if (!strcmp(val
, "tcpudp"))
571 if (put_value(ptr
, &proto
, sizeof(proto
), is_list
))
574 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
580 ent
= getprotobyname(val
);
584 proto
.protocol
= ent
->p_proto
;
585 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
589 proto
.protocol
= strtoul(val
, &e
, 10);
591 if ((e
== val
) || (*e
!= 0))
594 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
599 fw3_parse_ipset_method(void *ptr
, const char *val
, bool is_list
)
601 return parse_enum(ptr
, val
, &fw3_ipset_method_names
[FW3_IPSET_METHOD_BITMAP
],
602 FW3_IPSET_METHOD_BITMAP
, FW3_IPSET_METHOD_LIST
);
606 fw3_parse_ipset_datatype(void *ptr
, const char *val
, bool is_list
)
608 struct fw3_ipset_datatype type
= { };
612 if (!strncmp(val
, "dest_", 5))
617 else if (!strncmp(val
, "dst_", 4))
622 else if (!strncmp(val
, "src_", 4))
628 if (parse_enum(&type
.type
, val
, &fw3_ipset_type_names
[FW3_IPSET_TYPE_IP
],
629 FW3_IPSET_TYPE_IP
, FW3_IPSET_TYPE_SET
))
631 put_value(ptr
, &type
, sizeof(type
), is_list
);
639 fw3_parse_date(void *ptr
, const char *val
, bool is_list
)
641 unsigned int year
= 1970, mon
= 1, day
= 1, hour
= 0, min
= 0, sec
= 0;
642 struct tm tm
= { 0 };
645 year
= strtoul(val
, &p
, 10);
646 if ((*p
!= '-' && *p
) || year
< 1970 || year
> 2038)
651 mon
= strtoul(++p
, &p
, 10);
652 if ((*p
!= '-' && *p
) || mon
> 12)
657 day
= strtoul(++p
, &p
, 10);
658 if ((*p
!= 'T' && *p
) || day
> 31)
663 hour
= strtoul(++p
, &p
, 10);
664 if ((*p
!= ':' && *p
) || hour
> 23)
669 min
= strtoul(++p
, &p
, 10);
670 if ((*p
!= ':' && *p
) || min
> 59)
675 sec
= strtoul(++p
, &p
, 10);
680 tm
.tm_year
= year
- 1900;
687 if (mktime(&tm
) >= 0)
689 *((struct tm
*)ptr
) = tm
;
698 fw3_parse_time(void *ptr
, const char *val
, bool is_list
)
700 unsigned int hour
= 0, min
= 0, sec
= 0;
703 hour
= strtoul(val
, &p
, 10);
704 if (*p
!= ':' || hour
> 23)
707 min
= strtoul(++p
, &p
, 10);
708 if ((*p
!= ':' && *p
) || min
> 59)
713 sec
= strtoul(++p
, &p
, 10);
718 *((int *)ptr
) = 60 * 60 * hour
+ 60 * min
+ sec
;
726 fw3_parse_weekdays(void *ptr
, const char *val
, bool is_list
)
733 fw3_setbit(*(uint8_t *)ptr
, 0);
734 while (isspace(*++val
));
737 if (!(s
= strdup(val
)))
740 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
742 if (!parse_enum(&w
, p
, weekdays
, 1, 7))
744 w
= strtoul(p
, &p
, 10);
746 if (*p
|| w
< 1 || w
> 7)
753 fw3_setbit(*(uint8_t *)ptr
, w
);
761 fw3_parse_monthdays(void *ptr
, const char *val
, bool is_list
)
768 fw3_setbit(*(uint32_t *)ptr
, 0);
769 while (isspace(*++val
));
772 if (!(s
= strdup(val
)))
775 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
777 d
= strtoul(p
, &p
, 10);
779 if (*p
|| d
< 1 || d
> 31)
785 fw3_setbit(*(uint32_t *)ptr
, d
);
793 fw3_parse_include_type(void *ptr
, const char *val
, bool is_list
)
795 return parse_enum(ptr
, val
, include_types
,
796 FW3_INC_TYPE_SCRIPT
, FW3_INC_TYPE_RESTORE
);
800 fw3_parse_reflection_source(void *ptr
, const char *val
, bool is_list
)
802 return parse_enum(ptr
, val
, reflection_sources
,
803 FW3_REFLECTION_INTERNAL
, FW3_REFLECTION_EXTERNAL
);
807 fw3_parse_mark(void *ptr
, const char *val
, bool is_list
)
811 struct fw3_mark
*m
= ptr
;
816 while (isspace(*++val
));
819 if ((s
= strchr(val
, '/')) != NULL
)
822 n
= strtoul(val
, &e
, 0);
828 m
->mask
= 0xFFFFFFFF;
832 n
= strtoul(s
, &e
, 0);
845 fw3_parse_setmatch(void *ptr
, const char *val
, bool is_list
)
847 struct fw3_setmatch
*m
= ptr
;
854 while (isspace(*++val
));
857 if (!(s
= strdup(val
)))
860 if (!(p
= strtok(s
, " \t")))
866 strncpy(m
->name
, p
, sizeof(m
->name
));
868 for (i
= 0, p
= strtok(NULL
, " \t,");
870 i
++, p
= strtok(NULL
, " \t,"))
872 if (!strncmp(p
, "dest", 4) || !strncmp(p
, "dst", 3))
874 else if (!strncmp(p
, "src", 3))
885 fw3_parse_direction(void *ptr
, const char *val
, bool is_list
)
890 if (!strcmp(val
, "in") || !strcmp(val
, "ingress"))
892 else if (!strcmp(val
, "out") || !strcmp(val
, "egress"))
902 fw3_parse_options(void *s
, const struct fw3_option
*opts
,
903 struct uci_section
*section
)
907 struct uci_element
*e
, *l
;
908 struct uci_option
*o
;
909 const struct fw3_option
*opt
;
910 struct list_head
*dest
;
913 uci_foreach_element(§ion
->options
, e
)
915 o
= uci_to_option(e
);
918 for (opt
= opts
; opt
->name
; opt
++)
923 if (strcmp(opt
->name
, e
->name
))
926 if (o
->type
== UCI_TYPE_LIST
)
930 warn_elem(e
, "must not be a list");
935 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
937 uci_foreach_element(&o
->v
.list
, l
)
942 if (!opt
->parse(dest
, l
->name
, true))
944 warn_elem(e
, "has invalid value '%s'", l
->name
);
960 if (!opt
->parse((char *)s
+ opt
->offset
, o
->v
.string
, false))
962 warn_elem(e
, "has invalid value '%s'", o
->v
.string
);
969 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
971 for (p
= strtok(v
, " \t"); p
!= NULL
; p
= strtok(NULL
, " \t"))
973 /* If we encounter a sole "!" token, assume that it
974 * is meant to be part of the next token, so silently
975 * skip it and remember the state... */
982 /* The previous token was a sole "!", rewind pointer
983 * back by one byte to precede the value with an
984 * exclamation mark which effectively turns
985 * ("!", "foo") into ("!foo") */
992 if (!opt
->parse(dest
, p
, true))
994 warn_elem(e
, "has invalid value '%s'", p
);
1000 /* The last token was a sole "!" without any subsequent
1001 * text, so pass it to the option parser as-is. */
1002 if (inv
&& !opt
->parse(dest
, "!", true))
1004 warn_elem(e
, "has invalid value '%s'", p
);
1015 warn_elem(e
, "is unknown");
1023 fw3_parse_blob_options(void *s
, const struct fw3_option
*opts
,
1024 struct blob_attr
*a
, const char *name
)
1026 char *p
, *v
, buf
[16];
1029 struct blob_attr
*o
, *e
;
1030 const struct fw3_option
*opt
;
1031 struct list_head
*dest
;
1034 blobmsg_for_each_attr(o
, a
, rem
)
1038 for (opt
= opts
; opt
->name
; opt
++)
1043 if (strcmp(opt
->name
, blobmsg_name(o
)))
1046 if (blobmsg_type(o
) == BLOBMSG_TYPE_ARRAY
)
1048 if (!opt
->elem_size
)
1050 fprintf(stderr
, "%s: '%s' must not be a list\n",
1057 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
1059 blobmsg_for_each_attr(e
, o
, erem
)
1061 if (blobmsg_type(e
) == BLOBMSG_TYPE_INT32
) {
1062 snprintf(buf
, sizeof(buf
), "%d", blobmsg_get_u32(e
));
1065 v
= blobmsg_get_string(e
);
1068 if (!opt
->parse(dest
, v
, true))
1070 fprintf(stderr
, "%s: '%s' has invalid value '%s'\n",
1071 name
, opt
->name
, v
);
1080 if (blobmsg_type(o
) == BLOBMSG_TYPE_INT32
) {
1081 snprintf(buf
, sizeof(buf
), "%d", blobmsg_get_u32(o
));
1084 v
= blobmsg_get_string(o
);
1090 if (!opt
->elem_size
)
1092 if (!opt
->parse((char *)s
+ opt
->offset
, v
, false))
1094 fprintf(stderr
, "%s: '%s' has invalid value '%s'\n",
1095 name
, opt
->name
, v
);
1101 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
1103 for (p
= strtok(v
, " \t"); p
!= NULL
; p
= strtok(NULL
, " \t"))
1105 if (!opt
->parse(dest
, p
, true))
1107 fprintf(stderr
, "%s: '%s' has invalid value '%s'\n",
1108 name
, opt
->name
, p
);
1120 if (!known
&& strcmp(blobmsg_name(o
), "type"))
1121 fprintf(stderr
, "%s: '%s' is unknown\n", name
, blobmsg_name(o
));
1129 fw3_address_to_string(struct fw3_address
*address
, bool allow_invert
, bool as_cidr
)
1131 char *p
, ip
[INET6_ADDRSTRLEN
];
1132 static char buf
[INET6_ADDRSTRLEN
* 2 + 2];
1136 if (address
->invert
&& allow_invert
)
1137 p
+= sprintf(p
, "!");
1139 inet_ntop(address
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
1140 &address
->address
.v4
, ip
, sizeof(ip
));
1142 p
+= sprintf(p
, "%s", ip
);
1146 inet_ntop(address
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
1147 &address
->mask
.v4
, ip
, sizeof(ip
));
1149 p
+= sprintf(p
, "-%s", ip
);
1153 inet_ntop(address
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
1154 &address
->mask
.v4
, ip
, sizeof(ip
));
1156 p
+= sprintf(p
, "/%s", ip
);
1160 p
+= sprintf(p
, "/%u", fw3_netmask2bitlen(address
->family
,
1161 &address
->mask
.v6
));