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
] = {
89 const char *fw3_reject_code_names
[__FW3_REJECT_CODE_MAX
] = {
95 const char *fw3_limit_units
[__FW3_LIMIT_UNIT_MAX
] = {
102 const char *fw3_ipset_method_names
[__FW3_IPSET_METHOD_MAX
] = {
109 const char *fw3_ipset_type_names
[__FW3_IPSET_TYPE_MAX
] = {
118 static const char *weekdays
[] = {
128 static const char *include_types
[] = {
133 static const char *reflection_sources
[] = {
140 fw3_parse_bool(void *ptr
, const char *val
, bool is_list
)
142 if (!strcmp(val
, "true") || !strcmp(val
, "yes") || !strcmp(val
, "1"))
143 *((bool *)ptr
) = true;
145 *((bool *)ptr
) = false;
151 fw3_parse_int(void *ptr
, const char *val
, bool is_list
)
154 int n
= strtol(val
, &e
, 0);
165 fw3_parse_string(void *ptr
, const char *val
, bool is_list
)
167 *((char **)ptr
) = (char *)val
;
172 fw3_parse_target(void *ptr
, const char *val
, bool is_list
)
174 return parse_enum(ptr
, val
, &fw3_flag_names
[FW3_FLAG_ACCEPT
],
175 FW3_FLAG_ACCEPT
, FW3_FLAG_MASQUERADE
);
179 fw3_parse_reject_code(void *ptr
, const char *val
, bool is_list
)
181 return parse_enum(ptr
, val
, &fw3_reject_code_names
[FW3_REJECT_CODE_TCP_RESET
],
182 FW3_REJECT_CODE_TCP_RESET
, FW3_REJECT_CODE_ADM_PROHIBITED
);
186 fw3_parse_limit(void *ptr
, const char *val
, bool is_list
)
188 struct fw3_limit
*limit
= ptr
;
189 enum fw3_limit_unit u
= FW3_LIMIT_UNIT_SECOND
;
195 limit
->invert
= true;
196 while (isspace(*++val
));
199 n
= strtol(val
, &e
, 10);
201 if (errno
== ERANGE
|| errno
== EINVAL
)
204 if (*e
&& *e
++ != '/')
210 if (!parse_enum(&u
, e
, fw3_limit_units
, 0, FW3_LIMIT_UNIT_DAY
))
220 fw3_parse_device(void *ptr
, const char *val
, bool is_list
)
223 struct fw3_device dev
= { };
229 put_value(ptr
, &dev
, sizeof(dev
), is_list
);
236 while (isspace(*++val
));
239 if ((p
= strchr(val
, '@')) != NULL
)
242 snprintf(dev
.network
, sizeof(dev
.network
), "%s", p
);
246 snprintf(dev
.name
, sizeof(dev
.name
), "%s", val
);
251 put_value(ptr
, &dev
, sizeof(dev
), is_list
);
256 fw3_parse_address(void *ptr
, const char *val
, bool is_list
)
258 struct fw3_address addr
= { };
261 char *p
= NULL
, *m
= NULL
, *s
, *e
;
267 while (isspace(*++val
));
275 if ((m
= strchr(s
, '/')) != NULL
)
277 else if ((p
= strchr(s
, '-')) != NULL
)
280 if (inet_pton(AF_INET6
, s
, &v6
))
282 addr
.family
= FW3_FAMILY_V6
;
283 addr
.address
.v6
= v6
;
287 if (!inet_pton(AF_INET6
, m
, &v6
))
289 bits
= strtol(m
, &e
, 10);
291 if ((*e
!= 0) || !fw3_bitlen2netmask(addr
.family
, bits
, &v6
))
299 if (!inet_pton(AF_INET6
, p
, &addr
.mask
.v6
))
306 memset(addr
.mask
.v6
.s6_addr
, 0xFF, 16);
309 else if (inet_pton(AF_INET
, s
, &v4
))
311 addr
.family
= FW3_FAMILY_V4
;
312 addr
.address
.v4
= v4
;
316 if (!inet_pton(AF_INET
, m
, &v4
))
318 bits
= strtol(m
, &e
, 10);
320 if ((*e
!= 0) || !fw3_bitlen2netmask(addr
.family
, bits
, &v4
))
328 if (!inet_pton(AF_INET
, p
, &addr
.mask
.v4
))
335 addr
.mask
.v4
.s_addr
= 0xFFFFFFFF;
345 put_value(ptr
, &addr
, sizeof(addr
), is_list
);
354 fw3_parse_network(void *ptr
, const char *val
, bool is_list
)
356 struct fw3_device dev
= { };
357 struct fw3_address
*addr
, *tmp
;
358 LIST_HEAD(addr_list
);
361 if (!fw3_parse_address(ptr
, val
, is_list
))
363 if (!fw3_parse_device(&dev
, val
, false))
366 n_addrs
= fw3_ubus_address(&addr_list
, dev
.name
);
368 list_for_each_entry(addr
, &addr_list
, list
)
370 addr
->invert
= dev
.invert
;
371 addr
->resolved
= true;
374 /* add an empty address member with .set = false, .resolved = true
375 * to signal resolving failure to callers */
378 tmp
= fw3_alloc(sizeof(*tmp
));
379 tmp
->resolved
= true;
381 list_add_tail(&tmp
->list
, &addr_list
);
386 list_splice_tail(&addr_list
, ptr
);
388 else if (!list_empty(&addr_list
))
390 memcpy(ptr
, list_first_entry(&addr_list
, typeof(*addr
), list
),
393 list_for_each_entry_safe(addr
, tmp
, &addr_list
, list
)
402 fw3_parse_mac(void *ptr
, const char *val
, bool is_list
)
404 struct fw3_mac addr
= { };
405 struct ether_addr
*mac
;
410 while (isspace(*++val
));
413 if ((mac
= ether_aton(val
)) != NULL
)
418 put_value(ptr
, &addr
, sizeof(addr
), is_list
);
426 fw3_parse_port(void *ptr
, const char *val
, bool is_list
)
428 struct fw3_port range
= { };
436 while (isspace(*++val
));
439 n
= strtoul(val
, &p
, 10);
441 if (errno
== ERANGE
|| errno
== EINVAL
)
444 if (*p
&& *p
!= '-' && *p
!= ':')
449 m
= strtoul(++p
, NULL
, 10);
451 if (errno
== ERANGE
|| errno
== EINVAL
|| m
< n
)
464 put_value(ptr
, &range
, sizeof(range
), is_list
);
469 fw3_parse_family(void *ptr
, const char *val
, bool is_list
)
471 if (!strcmp(val
, "any") || !strcmp(val
, "*"))
472 *((enum fw3_family
*)ptr
) = FW3_FAMILY_ANY
;
473 else if (!strcmp(val
, "inet") || strrchr(val
, '4'))
474 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V4
;
475 else if (!strcmp(val
, "inet6") || strrchr(val
, '6'))
476 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V6
;
484 fw3_parse_icmptype(void *ptr
, const char *val
, bool is_list
)
486 struct fw3_icmptype icmp
= { };
492 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v4
); i
++)
494 if (!strcmp(val
, fw3_icmptype_list_v4
[i
].name
))
496 icmp
.type
= fw3_icmptype_list_v4
[i
].type
;
497 icmp
.code_min
= fw3_icmptype_list_v4
[i
].code_min
;
498 icmp
.code_max
= fw3_icmptype_list_v4
[i
].code_max
;
505 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v6
); i
++)
507 if (!strcmp(val
, fw3_icmptype_list_v6
[i
].name
))
509 icmp
.type6
= fw3_icmptype_list_v6
[i
].type
;
510 icmp
.code6_min
= fw3_icmptype_list_v6
[i
].code_min
;
511 icmp
.code6_max
= fw3_icmptype_list_v6
[i
].code_max
;
520 i
= strtoul(val
, &p
, 10);
522 if ((p
== val
) || (*p
!= '/' && *p
!= 0) || (i
> 0xFF))
530 i
= strtoul(val
, &p
, 10);
532 if ((p
== val
) || (*p
!= 0) || (i
> 0xFF))
541 icmp
.code_max
= 0xFF;
544 icmp
.type6
= icmp
.type
;
545 icmp
.code6_min
= icmp
.code_max
;
546 icmp
.code6_max
= icmp
.code_max
;
552 icmp
.family
= (v4
&& v6
) ? FW3_FAMILY_ANY
553 : (v6
? FW3_FAMILY_V6
: FW3_FAMILY_V4
);
555 put_value(ptr
, &icmp
, sizeof(icmp
), is_list
);
560 fw3_parse_protocol(void *ptr
, const char *val
, bool is_list
)
562 struct fw3_protocol proto
= { };
563 struct protoent
*ent
;
569 while (isspace(*++val
));
572 if (!strcmp(val
, "all") || !strcmp(val
, "any") || !strcmp(val
, "*"))
575 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
578 else if (!strcmp(val
, "icmpv6"))
582 else if (!strcmp(val
, "tcpudp"))
585 if (put_value(ptr
, &proto
, sizeof(proto
), is_list
))
588 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
594 ent
= getprotobyname(val
);
598 proto
.protocol
= ent
->p_proto
;
599 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
603 proto
.protocol
= strtoul(val
, &e
, 10);
605 if ((e
== val
) || (*e
!= 0))
608 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
613 fw3_parse_ipset_method(void *ptr
, const char *val
, bool is_list
)
615 return parse_enum(ptr
, val
, &fw3_ipset_method_names
[FW3_IPSET_METHOD_BITMAP
],
616 FW3_IPSET_METHOD_BITMAP
, FW3_IPSET_METHOD_LIST
);
620 fw3_parse_ipset_datatype(void *ptr
, const char *val
, bool is_list
)
622 struct fw3_ipset_datatype type
= { };
626 if (!strncmp(val
, "dest_", 5))
631 else if (!strncmp(val
, "dst_", 4))
636 else if (!strncmp(val
, "src_", 4))
642 if (parse_enum(&type
.type
, val
, &fw3_ipset_type_names
[FW3_IPSET_TYPE_IP
],
643 FW3_IPSET_TYPE_IP
, FW3_IPSET_TYPE_SET
))
645 put_value(ptr
, &type
, sizeof(type
), is_list
);
653 fw3_parse_date(void *ptr
, const char *val
, bool is_list
)
655 unsigned int year
= 1970, mon
= 1, day
= 1, hour
= 0, min
= 0, sec
= 0;
656 struct tm tm
= { 0 };
660 year
= strtoul(val
, &p
, 10);
661 if ((*p
!= '-' && *p
) || year
< 1970 || year
> 2038)
666 mon
= strtoul(++p
, &p
, 10);
667 if ((*p
!= '-' && *p
) || mon
> 12)
672 day
= strtoul(++p
, &p
, 10);
673 if ((*p
!= 'T' && *p
) || day
> 31)
678 hour
= strtoul(++p
, &p
, 10);
679 if ((*p
!= ':' && *p
) || hour
> 23)
684 min
= strtoul(++p
, &p
, 10);
685 if ((*p
!= ':' && *p
) || min
> 59)
690 sec
= strtoul(++p
, &p
, 10);
695 tm
.tm_year
= year
- 1900;
702 ts
= mktime(&tm
) - timezone
;
706 gmtime_r(&ts
, (struct tm
*)ptr
);
715 fw3_parse_time(void *ptr
, const char *val
, bool is_list
)
717 unsigned int hour
= 0, min
= 0, sec
= 0;
720 hour
= strtoul(val
, &p
, 10);
721 if (*p
!= ':' || hour
> 23)
724 min
= strtoul(++p
, &p
, 10);
725 if ((*p
!= ':' && *p
) || min
> 59)
730 sec
= strtoul(++p
, &p
, 10);
735 *((int *)ptr
) = 60 * 60 * hour
+ 60 * min
+ sec
;
743 fw3_parse_weekdays(void *ptr
, const char *val
, bool is_list
)
750 fw3_setbit(*(uint8_t *)ptr
, 0);
751 while (isspace(*++val
));
754 if (!(s
= strdup(val
)))
757 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
759 if (!parse_enum(&w
, p
, weekdays
, 1, 7))
761 w
= strtoul(p
, &p
, 10);
763 if (*p
|| w
< 1 || w
> 7)
770 fw3_setbit(*(uint8_t *)ptr
, w
);
778 fw3_parse_monthdays(void *ptr
, const char *val
, bool is_list
)
785 fw3_setbit(*(uint32_t *)ptr
, 0);
786 while (isspace(*++val
));
789 if (!(s
= strdup(val
)))
792 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
794 d
= strtoul(p
, &p
, 10);
796 if (*p
|| d
< 1 || d
> 31)
802 fw3_setbit(*(uint32_t *)ptr
, d
);
810 fw3_parse_include_type(void *ptr
, const char *val
, bool is_list
)
812 return parse_enum(ptr
, val
, include_types
,
813 FW3_INC_TYPE_SCRIPT
, FW3_INC_TYPE_RESTORE
);
817 fw3_parse_reflection_source(void *ptr
, const char *val
, bool is_list
)
819 return parse_enum(ptr
, val
, reflection_sources
,
820 FW3_REFLECTION_INTERNAL
, FW3_REFLECTION_EXTERNAL
);
824 fw3_parse_mark(void *ptr
, const char *val
, bool is_list
)
828 struct fw3_mark
*m
= ptr
;
833 while (isspace(*++val
));
836 if ((s
= strchr(val
, '/')) != NULL
)
839 n
= strtoul(val
, &e
, 0);
845 m
->mask
= 0xFFFFFFFF;
849 n
= strtoul(s
, &e
, 0);
862 fw3_parse_setmatch(void *ptr
, const char *val
, bool is_list
)
864 struct fw3_setmatch
*m
= ptr
;
871 while (isspace(*++val
));
874 if (!(s
= strdup(val
)))
877 if (!(p
= strtok(s
, " \t")))
883 strncpy(m
->name
, p
, sizeof(m
->name
));
885 for (i
= 0, p
= strtok(NULL
, " \t,");
887 i
++, p
= strtok(NULL
, " \t,"))
889 if (!strncmp(p
, "dest", 4) || !strncmp(p
, "dst", 3))
891 else if (!strncmp(p
, "src", 3))
902 fw3_parse_direction(void *ptr
, const char *val
, bool is_list
)
907 if (!strcmp(val
, "in") || !strcmp(val
, "ingress"))
909 else if (!strcmp(val
, "out") || !strcmp(val
, "egress"))
918 fw3_parse_cthelper(void *ptr
, const char *val
, bool is_list
)
920 struct fw3_cthelpermatch m
= { };
925 while (isspace(*++val
));
931 strncpy(m
.name
, val
, sizeof(m
.name
) - 1);
932 put_value(ptr
, &m
, sizeof(m
), is_list
);
940 fw3_parse_setentry(void *ptr
, const char *val
, bool is_list
)
942 struct fw3_setentry e
= { };
945 put_value(ptr
, &e
, sizeof(e
), is_list
);
952 fw3_parse_options(void *s
, const struct fw3_option
*opts
,
953 struct uci_section
*section
)
957 struct uci_element
*e
, *l
;
958 struct uci_option
*o
;
959 const struct fw3_option
*opt
;
960 struct list_head
*dest
;
963 uci_foreach_element(§ion
->options
, e
)
965 o
= uci_to_option(e
);
968 for (opt
= opts
; opt
->name
; opt
++)
973 if (strcmp(opt
->name
, e
->name
))
976 if (o
->type
== UCI_TYPE_LIST
)
980 warn_elem(e
, "must not be a list");
985 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
987 uci_foreach_element(&o
->v
.list
, l
)
992 if (!opt
->parse(dest
, l
->name
, true))
994 warn_elem(e
, "has invalid value '%s'", l
->name
);
1008 if (!opt
->elem_size
)
1010 if (!opt
->parse((char *)s
+ opt
->offset
, o
->v
.string
, false))
1012 warn_elem(e
, "has invalid value '%s'", o
->v
.string
);
1019 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
1021 for (p
= strtok(v
, " \t"); p
!= NULL
; p
= strtok(NULL
, " \t"))
1023 /* If we encounter a sole "!" token, assume that it
1024 * is meant to be part of the next token, so silently
1025 * skip it and remember the state... */
1026 if (!strcmp(p
, "!"))
1032 /* The previous token was a sole "!", rewind pointer
1033 * back by one byte to precede the value with an
1034 * exclamation mark which effectively turns
1035 * ("!", "foo") into ("!foo") */
1042 if (!opt
->parse(dest
, p
, true))
1044 warn_elem(e
, "has invalid value '%s'", p
);
1050 /* The last token was a sole "!" without any subsequent
1051 * text, so pass it to the option parser as-is. */
1052 if (inv
&& !opt
->parse(dest
, "!", true))
1054 warn_elem(e
, "has invalid value '%s'", p
);
1065 warn_elem(e
, "is unknown");
1073 fw3_parse_blob_options(void *s
, const struct fw3_option
*opts
,
1074 struct blob_attr
*a
, const char *name
)
1076 char *p
, *v
, buf
[16];
1079 struct blob_attr
*o
, *e
;
1080 const struct fw3_option
*opt
;
1081 struct list_head
*dest
;
1084 blobmsg_for_each_attr(o
, a
, rem
)
1088 for (opt
= opts
; opt
->name
; opt
++)
1093 if (strcmp(opt
->name
, blobmsg_name(o
)))
1096 if (blobmsg_type(o
) == BLOBMSG_TYPE_ARRAY
)
1098 if (!opt
->elem_size
)
1100 fprintf(stderr
, "%s: '%s' must not be a list\n",
1107 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
1109 blobmsg_for_each_attr(e
, o
, erem
)
1111 if (blobmsg_type(e
) == BLOBMSG_TYPE_INT32
) {
1112 snprintf(buf
, sizeof(buf
), "%d", blobmsg_get_u32(e
));
1115 v
= blobmsg_get_string(e
);
1118 if (!opt
->parse(dest
, v
, true))
1120 fprintf(stderr
, "%s: '%s' has invalid value '%s'\n",
1121 name
, opt
->name
, v
);
1130 if (blobmsg_type(o
) == BLOBMSG_TYPE_INT32
) {
1131 snprintf(buf
, sizeof(buf
), "%d", blobmsg_get_u32(o
));
1134 v
= blobmsg_get_string(o
);
1140 if (!opt
->elem_size
)
1142 if (!opt
->parse((char *)s
+ opt
->offset
, v
, false))
1144 fprintf(stderr
, "%s: '%s' has invalid value '%s'\n",
1145 name
, opt
->name
, v
);
1151 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
1153 for (p
= strtok(v
, " \t"); p
!= NULL
; p
= strtok(NULL
, " \t"))
1155 if (!opt
->parse(dest
, p
, true))
1157 fprintf(stderr
, "%s: '%s' has invalid value '%s'\n",
1158 name
, opt
->name
, p
);
1170 if (!known
&& strcmp(blobmsg_name(o
), "type"))
1171 fprintf(stderr
, "%s: '%s' is unknown\n", name
, blobmsg_name(o
));
1179 fw3_address_to_string(struct fw3_address
*address
, bool allow_invert
, bool as_cidr
)
1181 char *p
, ip
[INET6_ADDRSTRLEN
];
1182 static char buf
[INET6_ADDRSTRLEN
* 2 + 2];
1186 if (address
->invert
&& allow_invert
)
1187 p
+= sprintf(p
, "!");
1189 inet_ntop(address
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
1190 &address
->address
.v4
, ip
, sizeof(ip
));
1192 p
+= sprintf(p
, "%s", ip
);
1196 inet_ntop(address
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
1197 &address
->mask
.v4
, ip
, sizeof(ip
));
1199 p
+= sprintf(p
, "-%s", ip
);
1203 inet_ntop(address
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
1204 &address
->mask
.v4
, ip
, sizeof(ip
));
1206 p
+= sprintf(p
, "/%s", ip
);
1210 p
+= sprintf(p
, "/%u", fw3_netmask2bitlen(address
->family
,
1211 &address
->mask
.v6
));