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_limit_units
[__FW3_LIMIT_UNIT_MAX
] = {
96 const char *fw3_ipset_method_names
[__FW3_IPSET_METHOD_MAX
] = {
103 const char *fw3_ipset_type_names
[__FW3_IPSET_TYPE_MAX
] = {
112 static const char *weekdays
[] = {
122 static const char *include_types
[] = {
127 static const char *reflection_sources
[] = {
134 fw3_parse_bool(void *ptr
, const char *val
, bool is_list
)
136 if (!strcmp(val
, "true") || !strcmp(val
, "yes") || !strcmp(val
, "1"))
137 *((bool *)ptr
) = true;
139 *((bool *)ptr
) = false;
145 fw3_parse_int(void *ptr
, const char *val
, bool is_list
)
148 int n
= strtol(val
, &e
, 0);
159 fw3_parse_string(void *ptr
, const char *val
, bool is_list
)
161 *((char **)ptr
) = (char *)val
;
166 fw3_parse_target(void *ptr
, const char *val
, bool is_list
)
168 return parse_enum(ptr
, val
, &fw3_flag_names
[FW3_FLAG_ACCEPT
],
169 FW3_FLAG_ACCEPT
, FW3_FLAG_MASQUERADE
);
173 fw3_parse_limit(void *ptr
, const char *val
, bool is_list
)
175 struct fw3_limit
*limit
= ptr
;
176 enum fw3_limit_unit u
= FW3_LIMIT_UNIT_SECOND
;
182 limit
->invert
= true;
183 while (isspace(*++val
));
186 n
= strtol(val
, &e
, 10);
188 if (errno
== ERANGE
|| errno
== EINVAL
)
191 if (*e
&& *e
++ != '/')
197 if (!parse_enum(&u
, e
, fw3_limit_units
, 0, FW3_LIMIT_UNIT_DAY
))
207 fw3_parse_device(void *ptr
, const char *val
, bool is_list
)
210 struct fw3_device dev
= { };
216 put_value(ptr
, &dev
, sizeof(dev
), is_list
);
223 while (isspace(*++val
));
226 if ((p
= strchr(val
, '@')) != NULL
)
229 snprintf(dev
.network
, sizeof(dev
.network
), "%s", p
);
233 snprintf(dev
.name
, sizeof(dev
.name
), "%s", val
);
238 put_value(ptr
, &dev
, sizeof(dev
), is_list
);
243 fw3_parse_address(void *ptr
, const char *val
, bool is_list
)
245 struct fw3_address addr
= { };
248 char *p
= NULL
, *m
= NULL
, *s
, *e
;
254 while (isspace(*++val
));
262 if ((m
= strchr(s
, '/')) != NULL
)
264 else if ((p
= strchr(s
, '-')) != NULL
)
267 if (inet_pton(AF_INET6
, s
, &v6
))
269 addr
.family
= FW3_FAMILY_V6
;
270 addr
.address
.v6
= v6
;
274 if (!inet_pton(AF_INET6
, m
, &v6
))
276 bits
= strtol(m
, &e
, 10);
278 if ((*e
!= 0) || !fw3_bitlen2netmask(addr
.family
, bits
, &v6
))
286 if (!inet_pton(AF_INET6
, p
, &addr
.mask
.v6
))
293 memset(addr
.mask
.v6
.s6_addr
, 0xFF, 16);
296 else if (inet_pton(AF_INET
, s
, &v4
))
298 addr
.family
= FW3_FAMILY_V4
;
299 addr
.address
.v4
= v4
;
303 if (!inet_pton(AF_INET
, m
, &v4
))
305 bits
= strtol(m
, &e
, 10);
307 if ((*e
!= 0) || !fw3_bitlen2netmask(addr
.family
, bits
, &v4
))
315 if (!inet_pton(AF_INET
, p
, &addr
.mask
.v4
))
322 addr
.mask
.v4
.s_addr
= 0xFFFFFFFF;
332 put_value(ptr
, &addr
, sizeof(addr
), is_list
);
341 fw3_parse_network(void *ptr
, const char *val
, bool is_list
)
343 struct fw3_device dev
= { };
344 struct fw3_address
*addr
, *tmp
;
345 LIST_HEAD(addr_list
);
348 if (!fw3_parse_address(ptr
, val
, is_list
))
350 if (!fw3_parse_device(&dev
, val
, false))
353 n_addrs
= fw3_ubus_address(&addr_list
, dev
.name
);
355 list_for_each_entry(addr
, &addr_list
, list
)
357 addr
->invert
= dev
.invert
;
358 addr
->resolved
= true;
361 /* add an empty address member with .set = false, .resolved = true
362 * to signal resolving failure to callers */
365 tmp
= fw3_alloc(sizeof(*tmp
));
366 tmp
->resolved
= true;
368 list_add_tail(&tmp
->list
, &addr_list
);
373 list_splice_tail(&addr_list
, ptr
);
375 else if (!list_empty(&addr_list
))
377 memcpy(ptr
, list_first_entry(&addr_list
, typeof(*addr
), list
),
380 list_for_each_entry_safe(addr
, tmp
, &addr_list
, list
)
389 fw3_parse_mac(void *ptr
, const char *val
, bool is_list
)
391 struct fw3_mac addr
= { };
392 struct ether_addr
*mac
;
397 while (isspace(*++val
));
400 if ((mac
= ether_aton(val
)) != NULL
)
405 put_value(ptr
, &addr
, sizeof(addr
), is_list
);
413 fw3_parse_port(void *ptr
, const char *val
, bool is_list
)
415 struct fw3_port range
= { };
423 while (isspace(*++val
));
426 n
= strtoul(val
, &p
, 10);
428 if (errno
== ERANGE
|| errno
== EINVAL
)
431 if (*p
&& *p
!= '-' && *p
!= ':')
436 m
= strtoul(++p
, NULL
, 10);
438 if (errno
== ERANGE
|| errno
== EINVAL
|| m
< n
)
451 put_value(ptr
, &range
, sizeof(range
), is_list
);
456 fw3_parse_family(void *ptr
, const char *val
, bool is_list
)
458 if (!strcmp(val
, "any") || !strcmp(val
, "*"))
459 *((enum fw3_family
*)ptr
) = FW3_FAMILY_ANY
;
460 else if (!strcmp(val
, "inet") || strrchr(val
, '4'))
461 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V4
;
462 else if (!strcmp(val
, "inet6") || strrchr(val
, '6'))
463 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V6
;
471 fw3_parse_icmptype(void *ptr
, const char *val
, bool is_list
)
473 struct fw3_icmptype icmp
= { };
479 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v4
); i
++)
481 if (!strcmp(val
, fw3_icmptype_list_v4
[i
].name
))
483 icmp
.type
= fw3_icmptype_list_v4
[i
].type
;
484 icmp
.code_min
= fw3_icmptype_list_v4
[i
].code_min
;
485 icmp
.code_max
= fw3_icmptype_list_v4
[i
].code_max
;
492 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v6
); i
++)
494 if (!strcmp(val
, fw3_icmptype_list_v6
[i
].name
))
496 icmp
.type6
= fw3_icmptype_list_v6
[i
].type
;
497 icmp
.code6_min
= fw3_icmptype_list_v6
[i
].code_min
;
498 icmp
.code6_max
= fw3_icmptype_list_v6
[i
].code_max
;
507 i
= strtoul(val
, &p
, 10);
509 if ((p
== val
) || (*p
!= '/' && *p
!= 0) || (i
> 0xFF))
517 i
= strtoul(val
, &p
, 10);
519 if ((p
== val
) || (*p
!= 0) || (i
> 0xFF))
528 icmp
.code_max
= 0xFF;
531 icmp
.type6
= icmp
.type
;
532 icmp
.code6_min
= icmp
.code_max
;
533 icmp
.code6_max
= icmp
.code_max
;
539 icmp
.family
= (v4
&& v6
) ? FW3_FAMILY_ANY
540 : (v6
? FW3_FAMILY_V6
: FW3_FAMILY_V4
);
542 put_value(ptr
, &icmp
, sizeof(icmp
), is_list
);
547 fw3_parse_protocol(void *ptr
, const char *val
, bool is_list
)
549 struct fw3_protocol proto
= { };
550 struct protoent
*ent
;
556 while (isspace(*++val
));
559 if (!strcmp(val
, "all") || !strcmp(val
, "any") || !strcmp(val
, "*"))
562 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
565 else if (!strcmp(val
, "icmpv6"))
569 else if (!strcmp(val
, "tcpudp"))
572 if (put_value(ptr
, &proto
, sizeof(proto
), is_list
))
575 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
581 ent
= getprotobyname(val
);
585 proto
.protocol
= ent
->p_proto
;
586 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
590 proto
.protocol
= strtoul(val
, &e
, 10);
592 if ((e
== val
) || (*e
!= 0))
595 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
600 fw3_parse_ipset_method(void *ptr
, const char *val
, bool is_list
)
602 return parse_enum(ptr
, val
, &fw3_ipset_method_names
[FW3_IPSET_METHOD_BITMAP
],
603 FW3_IPSET_METHOD_BITMAP
, FW3_IPSET_METHOD_LIST
);
607 fw3_parse_ipset_datatype(void *ptr
, const char *val
, bool is_list
)
609 struct fw3_ipset_datatype type
= { };
613 if (!strncmp(val
, "dest_", 5))
618 else if (!strncmp(val
, "dst_", 4))
623 else if (!strncmp(val
, "src_", 4))
629 if (parse_enum(&type
.type
, val
, &fw3_ipset_type_names
[FW3_IPSET_TYPE_IP
],
630 FW3_IPSET_TYPE_IP
, FW3_IPSET_TYPE_SET
))
632 put_value(ptr
, &type
, sizeof(type
), is_list
);
640 fw3_parse_date(void *ptr
, const char *val
, bool is_list
)
642 unsigned int year
= 1970, mon
= 1, day
= 1, hour
= 0, min
= 0, sec
= 0;
643 struct tm tm
= { 0 };
646 year
= strtoul(val
, &p
, 10);
647 if ((*p
!= '-' && *p
) || year
< 1970 || year
> 2038)
652 mon
= strtoul(++p
, &p
, 10);
653 if ((*p
!= '-' && *p
) || mon
> 12)
658 day
= strtoul(++p
, &p
, 10);
659 if ((*p
!= 'T' && *p
) || day
> 31)
664 hour
= strtoul(++p
, &p
, 10);
665 if ((*p
!= ':' && *p
) || hour
> 23)
670 min
= strtoul(++p
, &p
, 10);
671 if ((*p
!= ':' && *p
) || min
> 59)
676 sec
= strtoul(++p
, &p
, 10);
681 tm
.tm_year
= year
- 1900;
688 if (mktime(&tm
) >= 0)
690 *((struct tm
*)ptr
) = tm
;
699 fw3_parse_time(void *ptr
, const char *val
, bool is_list
)
701 unsigned int hour
= 0, min
= 0, sec
= 0;
704 hour
= strtoul(val
, &p
, 10);
705 if (*p
!= ':' || hour
> 23)
708 min
= strtoul(++p
, &p
, 10);
709 if ((*p
!= ':' && *p
) || min
> 59)
714 sec
= strtoul(++p
, &p
, 10);
719 *((int *)ptr
) = 60 * 60 * hour
+ 60 * min
+ sec
;
727 fw3_parse_weekdays(void *ptr
, const char *val
, bool is_list
)
734 fw3_setbit(*(uint8_t *)ptr
, 0);
735 while (isspace(*++val
));
738 if (!(s
= strdup(val
)))
741 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
743 if (!parse_enum(&w
, p
, weekdays
, 1, 7))
745 w
= strtoul(p
, &p
, 10);
747 if (*p
|| w
< 1 || w
> 7)
754 fw3_setbit(*(uint8_t *)ptr
, w
);
762 fw3_parse_monthdays(void *ptr
, const char *val
, bool is_list
)
769 fw3_setbit(*(uint32_t *)ptr
, 0);
770 while (isspace(*++val
));
773 if (!(s
= strdup(val
)))
776 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
778 d
= strtoul(p
, &p
, 10);
780 if (*p
|| d
< 1 || d
> 31)
786 fw3_setbit(*(uint32_t *)ptr
, d
);
794 fw3_parse_include_type(void *ptr
, const char *val
, bool is_list
)
796 return parse_enum(ptr
, val
, include_types
,
797 FW3_INC_TYPE_SCRIPT
, FW3_INC_TYPE_RESTORE
);
801 fw3_parse_reflection_source(void *ptr
, const char *val
, bool is_list
)
803 return parse_enum(ptr
, val
, reflection_sources
,
804 FW3_REFLECTION_INTERNAL
, FW3_REFLECTION_EXTERNAL
);
808 fw3_parse_mark(void *ptr
, const char *val
, bool is_list
)
812 struct fw3_mark
*m
= ptr
;
817 while (isspace(*++val
));
820 if ((s
= strchr(val
, '/')) != NULL
)
823 n
= strtoul(val
, &e
, 0);
829 m
->mask
= 0xFFFFFFFF;
833 n
= strtoul(s
, &e
, 0);
846 fw3_parse_setmatch(void *ptr
, const char *val
, bool is_list
)
848 struct fw3_setmatch
*m
= ptr
;
855 while (isspace(*++val
));
858 if (!(s
= strdup(val
)))
861 if (!(p
= strtok(s
, " \t")))
867 strncpy(m
->name
, p
, sizeof(m
->name
));
869 for (i
= 0, p
= strtok(NULL
, " \t,");
871 i
++, p
= strtok(NULL
, " \t,"))
873 if (!strncmp(p
, "dest", 4) || !strncmp(p
, "dst", 3))
875 else if (!strncmp(p
, "src", 3))
886 fw3_parse_direction(void *ptr
, const char *val
, bool is_list
)
891 if (!strcmp(val
, "in") || !strcmp(val
, "ingress"))
893 else if (!strcmp(val
, "out") || !strcmp(val
, "egress"))
902 fw3_parse_cthelper(void *ptr
, const char *val
, bool is_list
)
904 struct fw3_cthelpermatch m
= { };
909 while (isspace(*++val
));
915 strncpy(m
.name
, val
, sizeof(m
.name
) - 1);
916 put_value(ptr
, &m
, sizeof(m
), is_list
);
924 fw3_parse_setentry(void *ptr
, const char *val
, bool is_list
)
926 struct fw3_setentry e
= { };
929 put_value(ptr
, &e
, sizeof(e
), is_list
);
936 fw3_parse_options(void *s
, const struct fw3_option
*opts
,
937 struct uci_section
*section
)
941 struct uci_element
*e
, *l
;
942 struct uci_option
*o
;
943 const struct fw3_option
*opt
;
944 struct list_head
*dest
;
947 uci_foreach_element(§ion
->options
, e
)
949 o
= uci_to_option(e
);
952 for (opt
= opts
; opt
->name
; opt
++)
957 if (strcmp(opt
->name
, e
->name
))
960 if (o
->type
== UCI_TYPE_LIST
)
964 warn_elem(e
, "must not be a list");
969 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
971 uci_foreach_element(&o
->v
.list
, l
)
976 if (!opt
->parse(dest
, l
->name
, true))
978 warn_elem(e
, "has invalid value '%s'", l
->name
);
994 if (!opt
->parse((char *)s
+ opt
->offset
, o
->v
.string
, false))
996 warn_elem(e
, "has invalid value '%s'", o
->v
.string
);
1003 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
1005 for (p
= strtok(v
, " \t"); p
!= NULL
; p
= strtok(NULL
, " \t"))
1007 /* If we encounter a sole "!" token, assume that it
1008 * is meant to be part of the next token, so silently
1009 * skip it and remember the state... */
1010 if (!strcmp(p
, "!"))
1016 /* The previous token was a sole "!", rewind pointer
1017 * back by one byte to precede the value with an
1018 * exclamation mark which effectively turns
1019 * ("!", "foo") into ("!foo") */
1026 if (!opt
->parse(dest
, p
, true))
1028 warn_elem(e
, "has invalid value '%s'", p
);
1034 /* The last token was a sole "!" without any subsequent
1035 * text, so pass it to the option parser as-is. */
1036 if (inv
&& !opt
->parse(dest
, "!", true))
1038 warn_elem(e
, "has invalid value '%s'", p
);
1049 warn_elem(e
, "is unknown");
1057 fw3_parse_blob_options(void *s
, const struct fw3_option
*opts
,
1058 struct blob_attr
*a
, const char *name
)
1060 char *p
, *v
, buf
[16];
1063 struct blob_attr
*o
, *e
;
1064 const struct fw3_option
*opt
;
1065 struct list_head
*dest
;
1068 blobmsg_for_each_attr(o
, a
, rem
)
1072 for (opt
= opts
; opt
->name
; opt
++)
1077 if (strcmp(opt
->name
, blobmsg_name(o
)))
1080 if (blobmsg_type(o
) == BLOBMSG_TYPE_ARRAY
)
1082 if (!opt
->elem_size
)
1084 fprintf(stderr
, "%s: '%s' must not be a list\n",
1091 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
1093 blobmsg_for_each_attr(e
, o
, erem
)
1095 if (blobmsg_type(e
) == BLOBMSG_TYPE_INT32
) {
1096 snprintf(buf
, sizeof(buf
), "%d", blobmsg_get_u32(e
));
1099 v
= blobmsg_get_string(e
);
1102 if (!opt
->parse(dest
, v
, true))
1104 fprintf(stderr
, "%s: '%s' has invalid value '%s'\n",
1105 name
, opt
->name
, v
);
1114 if (blobmsg_type(o
) == BLOBMSG_TYPE_INT32
) {
1115 snprintf(buf
, sizeof(buf
), "%d", blobmsg_get_u32(o
));
1118 v
= blobmsg_get_string(o
);
1124 if (!opt
->elem_size
)
1126 if (!opt
->parse((char *)s
+ opt
->offset
, v
, false))
1128 fprintf(stderr
, "%s: '%s' has invalid value '%s'\n",
1129 name
, opt
->name
, v
);
1135 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
1137 for (p
= strtok(v
, " \t"); p
!= NULL
; p
= strtok(NULL
, " \t"))
1139 if (!opt
->parse(dest
, p
, true))
1141 fprintf(stderr
, "%s: '%s' has invalid value '%s'\n",
1142 name
, opt
->name
, p
);
1154 if (!known
&& strcmp(blobmsg_name(o
), "type"))
1155 fprintf(stderr
, "%s: '%s' is unknown\n", name
, blobmsg_name(o
));
1163 fw3_address_to_string(struct fw3_address
*address
, bool allow_invert
, bool as_cidr
)
1165 char *p
, ip
[INET6_ADDRSTRLEN
];
1166 static char buf
[INET6_ADDRSTRLEN
* 2 + 2];
1170 if (address
->invert
&& allow_invert
)
1171 p
+= sprintf(p
, "!");
1173 inet_ntop(address
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
1174 &address
->address
.v4
, ip
, sizeof(ip
));
1176 p
+= sprintf(p
, "%s", ip
);
1180 inet_ntop(address
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
1181 &address
->mask
.v4
, ip
, sizeof(ip
));
1183 p
+= sprintf(p
, "-%s", ip
);
1187 inet_ntop(address
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
1188 &address
->mask
.v4
, ip
, sizeof(ip
));
1190 p
+= sprintf(p
, "/%s", ip
);
1194 p
+= sprintf(p
, "/%u", fw3_netmask2bitlen(address
->family
,
1195 &address
->mask
.v6
));