2 * firewall3 - 3rd OpenWrt UCI firewall implementation
4 * Copyright (C) 2013-2014 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
] = {
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
);
346 if (!fw3_parse_address(ptr
, val
, is_list
))
348 if (!fw3_parse_device(&dev
, val
, false))
351 fw3_ubus_address(&addr_list
, dev
.name
);
352 list_for_each_entry(addr
, &addr_list
, list
)
354 addr
->invert
= dev
.invert
;
355 addr
->resolved
= true;
360 list_splice_tail(&addr_list
, ptr
);
362 else if (!list_empty(&addr_list
))
364 memcpy(ptr
, list_first_entry(&addr_list
, typeof(*addr
), list
),
367 list_for_each_entry_safe(addr
, tmp
, &addr_list
, list
)
376 fw3_parse_mac(void *ptr
, const char *val
, bool is_list
)
378 struct fw3_mac addr
= { };
379 struct ether_addr
*mac
;
384 while (isspace(*++val
));
387 if ((mac
= ether_aton(val
)) != NULL
)
392 put_value(ptr
, &addr
, sizeof(addr
), is_list
);
400 fw3_parse_port(void *ptr
, const char *val
, bool is_list
)
402 struct fw3_port range
= { };
410 while (isspace(*++val
));
413 n
= strtoul(val
, &p
, 10);
415 if (errno
== ERANGE
|| errno
== EINVAL
)
418 if (*p
&& *p
!= '-' && *p
!= ':')
423 m
= strtoul(++p
, NULL
, 10);
425 if (errno
== ERANGE
|| errno
== EINVAL
|| m
< n
)
438 put_value(ptr
, &range
, sizeof(range
), is_list
);
443 fw3_parse_family(void *ptr
, const char *val
, bool is_list
)
445 if (!strcmp(val
, "any"))
446 *((enum fw3_family
*)ptr
) = FW3_FAMILY_ANY
;
447 else if (!strcmp(val
, "inet") || strrchr(val
, '4'))
448 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V4
;
449 else if (!strcmp(val
, "inet6") || strrchr(val
, '6'))
450 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V6
;
458 fw3_parse_icmptype(void *ptr
, const char *val
, bool is_list
)
460 struct fw3_icmptype icmp
= { };
466 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v4
); i
++)
468 if (!strcmp(val
, fw3_icmptype_list_v4
[i
].name
))
470 icmp
.type
= fw3_icmptype_list_v4
[i
].type
;
471 icmp
.code_min
= fw3_icmptype_list_v4
[i
].code_min
;
472 icmp
.code_max
= fw3_icmptype_list_v4
[i
].code_max
;
479 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v6
); i
++)
481 if (!strcmp(val
, fw3_icmptype_list_v6
[i
].name
))
483 icmp
.type6
= fw3_icmptype_list_v6
[i
].type
;
484 icmp
.code6_min
= fw3_icmptype_list_v6
[i
].code_min
;
485 icmp
.code6_max
= fw3_icmptype_list_v6
[i
].code_max
;
494 i
= strtoul(val
, &p
, 10);
496 if ((p
== val
) || (*p
!= '/' && *p
!= 0) || (i
> 0xFF))
504 i
= strtoul(val
, &p
, 10);
506 if ((p
== val
) || (*p
!= 0) || (i
> 0xFF))
515 icmp
.code_max
= 0xFF;
518 icmp
.type6
= icmp
.type
;
519 icmp
.code6_min
= icmp
.code_max
;
520 icmp
.code6_max
= icmp
.code_max
;
526 icmp
.family
= (v4
&& v6
) ? FW3_FAMILY_ANY
527 : (v6
? FW3_FAMILY_V6
: FW3_FAMILY_V4
);
529 put_value(ptr
, &icmp
, sizeof(icmp
), is_list
);
534 fw3_parse_protocol(void *ptr
, const char *val
, bool is_list
)
536 struct fw3_protocol proto
= { };
537 struct protoent
*ent
;
543 while (isspace(*++val
));
546 if (!strcmp(val
, "all"))
549 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
552 else if (!strcmp(val
, "icmpv6"))
556 else if (!strcmp(val
, "tcpudp"))
559 if (put_value(ptr
, &proto
, sizeof(proto
), is_list
))
562 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
568 ent
= getprotobyname(val
);
572 proto
.protocol
= ent
->p_proto
;
573 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
577 proto
.protocol
= strtoul(val
, &e
, 10);
579 if ((e
== val
) || (*e
!= 0))
582 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
587 fw3_parse_ipset_method(void *ptr
, const char *val
, bool is_list
)
589 return parse_enum(ptr
, val
, &fw3_ipset_method_names
[FW3_IPSET_METHOD_BITMAP
],
590 FW3_IPSET_METHOD_BITMAP
, FW3_IPSET_METHOD_LIST
);
594 fw3_parse_ipset_datatype(void *ptr
, const char *val
, bool is_list
)
596 struct fw3_ipset_datatype type
= { };
600 if (!strncmp(val
, "dest_", 5))
605 else if (!strncmp(val
, "dst_", 4))
610 else if (!strncmp(val
, "src_", 4))
616 if (parse_enum(&type
.type
, val
, &fw3_ipset_type_names
[FW3_IPSET_TYPE_IP
],
617 FW3_IPSET_TYPE_IP
, FW3_IPSET_TYPE_SET
))
619 put_value(ptr
, &type
, sizeof(type
), is_list
);
627 fw3_parse_date(void *ptr
, const char *val
, bool is_list
)
629 unsigned int year
= 1970, mon
= 1, day
= 1, hour
= 0, min
= 0, sec
= 0;
630 struct tm tm
= { 0 };
633 year
= strtoul(val
, &p
, 10);
634 if ((*p
!= '-' && *p
) || year
< 1970 || year
> 2038)
639 mon
= strtoul(++p
, &p
, 10);
640 if ((*p
!= '-' && *p
) || mon
> 12)
645 day
= strtoul(++p
, &p
, 10);
646 if ((*p
!= 'T' && *p
) || day
> 31)
651 hour
= strtoul(++p
, &p
, 10);
652 if ((*p
!= ':' && *p
) || hour
> 23)
657 min
= strtoul(++p
, &p
, 10);
658 if ((*p
!= ':' && *p
) || min
> 59)
663 sec
= strtoul(++p
, &p
, 10);
668 tm
.tm_year
= year
- 1900;
675 if (mktime(&tm
) >= 0)
677 *((struct tm
*)ptr
) = tm
;
686 fw3_parse_time(void *ptr
, const char *val
, bool is_list
)
688 unsigned int hour
= 0, min
= 0, sec
= 0;
691 hour
= strtoul(val
, &p
, 10);
692 if (*p
!= ':' || hour
> 23)
695 min
= strtoul(++p
, &p
, 10);
696 if ((*p
!= ':' && *p
) || min
> 59)
701 sec
= strtoul(++p
, &p
, 10);
706 *((int *)ptr
) = 60 * 60 * hour
+ 60 * min
+ sec
;
714 fw3_parse_weekdays(void *ptr
, const char *val
, bool is_list
)
721 setbit(*(uint8_t *)ptr
, 0);
722 while (isspace(*++val
));
725 if (!(s
= strdup(val
)))
728 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
730 if (!parse_enum(&w
, p
, weekdays
, 1, 7))
732 w
= strtoul(p
, &p
, 10);
734 if (*p
|| w
< 1 || w
> 7)
741 setbit(*(uint8_t *)ptr
, w
);
749 fw3_parse_monthdays(void *ptr
, const char *val
, bool is_list
)
756 setbit(*(uint32_t *)ptr
, 0);
757 while (isspace(*++val
));
760 if (!(s
= strdup(val
)))
763 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
765 d
= strtoul(p
, &p
, 10);
767 if (*p
|| d
< 1 || d
> 31)
773 setbit(*(uint32_t *)ptr
, d
);
781 fw3_parse_include_type(void *ptr
, const char *val
, bool is_list
)
783 return parse_enum(ptr
, val
, include_types
,
784 FW3_INC_TYPE_SCRIPT
, FW3_INC_TYPE_RESTORE
);
788 fw3_parse_reflection_source(void *ptr
, const char *val
, bool is_list
)
790 return parse_enum(ptr
, val
, reflection_sources
,
791 FW3_REFLECTION_INTERNAL
, FW3_REFLECTION_EXTERNAL
);
795 fw3_parse_mark(void *ptr
, const char *val
, bool is_list
)
799 struct fw3_mark
*m
= ptr
;
804 while (isspace(*++val
));
807 if ((s
= strchr(val
, '/')) != NULL
)
810 n
= strtoul(val
, &e
, 0);
816 m
->mask
= 0xFFFFFFFF;
820 n
= strtoul(s
, &e
, 0);
833 fw3_parse_setmatch(void *ptr
, const char *val
, bool is_list
)
835 struct fw3_setmatch
*m
= ptr
;
842 while (isspace(*++val
));
845 if (!(s
= strdup(val
)))
848 if (!(p
= strtok(s
, " \t")))
854 strncpy(m
->name
, p
, sizeof(m
->name
));
856 for (i
= 0, p
= strtok(NULL
, " \t,");
858 i
++, p
= strtok(NULL
, " \t,"))
860 if (!strncmp(p
, "dest", 4) || !strncmp(p
, "dst", 3))
862 else if (!strncmp(p
, "src", 3))
873 fw3_parse_direction(void *ptr
, const char *val
, bool is_list
)
878 if (!strcmp(val
, "in") || !strcmp(val
, "ingress"))
880 else if (!strcmp(val
, "out") || !strcmp(val
, "egress"))
890 fw3_parse_options(void *s
, const struct fw3_option
*opts
,
891 struct uci_section
*section
)
895 struct uci_element
*e
, *l
;
896 struct uci_option
*o
;
897 const struct fw3_option
*opt
;
898 struct list_head
*dest
;
901 uci_foreach_element(§ion
->options
, e
)
903 o
= uci_to_option(e
);
906 for (opt
= opts
; opt
->name
; opt
++)
911 if (strcmp(opt
->name
, e
->name
))
914 if (o
->type
== UCI_TYPE_LIST
)
918 warn_elem(e
, "must not be a list");
923 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
925 uci_foreach_element(&o
->v
.list
, l
)
930 if (!opt
->parse(dest
, l
->name
, true))
932 warn_elem(e
, "has invalid value '%s'", l
->name
);
948 if (!opt
->parse((char *)s
+ opt
->offset
, o
->v
.string
, false))
950 warn_elem(e
, "has invalid value '%s'", o
->v
.string
);
956 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
958 for (p
= strtok(v
, " \t"); p
!= NULL
; p
= strtok(NULL
, " \t"))
960 if (!opt
->parse(dest
, p
, true))
962 warn_elem(e
, "has invalid value '%s'", p
);
975 warn_elem(e
, "is unknown");
983 fw3_parse_blob_options(void *s
, const struct fw3_option
*opts
,
986 char *p
, *v
, buf
[16];
989 struct blob_attr
*o
, *e
;
990 const struct fw3_option
*opt
;
991 struct list_head
*dest
;
994 blobmsg_for_each_attr(o
, a
, rem
)
998 for (opt
= opts
; opt
->name
; opt
++)
1003 if (strcmp(opt
->name
, blobmsg_name(o
)))
1006 if (blobmsg_type(o
) == BLOBMSG_TYPE_ARRAY
)
1008 if (!opt
->elem_size
)
1010 fprintf(stderr
, "%s must not be a list\n", opt
->name
);
1015 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
1017 blobmsg_for_each_attr(e
, o
, erem
)
1019 if (blobmsg_type(e
) == BLOBMSG_TYPE_INT32
) {
1020 snprintf(buf
, sizeof(buf
), "%d", blobmsg_get_u32(e
));
1023 v
= blobmsg_get_string(e
);
1026 if (!opt
->parse(dest
, v
, true))
1028 fprintf(stderr
, "%s has invalid value '%s'\n", opt
->name
, v
);
1037 if (blobmsg_type(o
) == BLOBMSG_TYPE_INT32
) {
1038 snprintf(buf
, sizeof(buf
), "%d", blobmsg_get_u32(o
));
1041 v
= blobmsg_get_string(o
);
1047 if (!opt
->elem_size
)
1049 if (!opt
->parse((char *)s
+ opt
->offset
, v
, false))
1051 fprintf(stderr
, "%s has invalid value '%s'\n", opt
->name
, v
);
1057 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
1059 for (p
= strtok(v
, " \t"); p
!= NULL
; p
= strtok(NULL
, " \t"))
1061 if (!opt
->parse(dest
, p
, true))
1063 fprintf(stderr
, "%s has invalid value '%s'\n", opt
->name
, p
);
1076 fprintf(stderr
, "%s is unknown\n", blobmsg_name(o
));
1084 fw3_address_to_string(struct fw3_address
*address
, bool allow_invert
, bool as_cidr
)
1086 char *p
, ip
[INET6_ADDRSTRLEN
];
1087 static char buf
[INET6_ADDRSTRLEN
* 2 + 2];
1091 if (address
->invert
&& allow_invert
)
1092 p
+= sprintf(p
, "!");
1094 inet_ntop(address
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
1095 &address
->address
.v4
, ip
, sizeof(ip
));
1097 p
+= sprintf(p
, "%s", ip
);
1101 inet_ntop(address
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
1102 &address
->mask
.v4
, ip
, sizeof(ip
));
1104 p
+= sprintf(p
, "-%s", ip
);
1108 inet_ntop(address
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
1109 &address
->mask
.v4
, ip
, sizeof(ip
));
1111 p
+= sprintf(p
, "/%s", ip
);
1115 p
+= sprintf(p
, "/%u", fw3_netmask2bitlen(address
->family
,
1116 &address
->mask
.v6
));