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
] = {
90 const char *fw3_reject_code_names
[__FW3_REJECT_CODE_MAX
] = {
96 const char *fw3_limit_units
[__FW3_LIMIT_UNIT_MAX
] = {
103 const char *fw3_ipset_method_names
[__FW3_IPSET_METHOD_MAX
] = {
110 const char *fw3_ipset_type_names
[__FW3_IPSET_TYPE_MAX
] = {
119 static const char *weekdays
[] = {
129 static const char *include_types
[] = {
134 static const char *reflection_sources
[] = {
139 static const struct { const char *name
; uint8_t dscp
; } dscp_classes
[] = {
166 fw3_parse_bool(void *ptr
, const char *val
, bool is_list
)
168 if (!strcmp(val
, "true") || !strcmp(val
, "yes") || !strcmp(val
, "1"))
169 *((bool *)ptr
) = true;
171 *((bool *)ptr
) = false;
177 fw3_parse_int(void *ptr
, const char *val
, bool is_list
)
180 int n
= strtol(val
, &e
, 0);
191 fw3_parse_string(void *ptr
, const char *val
, bool is_list
)
193 *((char **)ptr
) = (char *)val
;
198 fw3_parse_target(void *ptr
, const char *val
, bool is_list
)
200 return parse_enum(ptr
, val
, &fw3_flag_names
[FW3_FLAG_ACCEPT
],
201 FW3_FLAG_ACCEPT
, FW3_FLAG_MASQUERADE
);
205 fw3_parse_reject_code(void *ptr
, const char *val
, bool is_list
)
207 return parse_enum(ptr
, val
, &fw3_reject_code_names
[FW3_REJECT_CODE_TCP_RESET
],
208 FW3_REJECT_CODE_TCP_RESET
, FW3_REJECT_CODE_ADM_PROHIBITED
);
212 fw3_parse_limit(void *ptr
, const char *val
, bool is_list
)
214 struct fw3_limit
*limit
= ptr
;
215 enum fw3_limit_unit u
= FW3_LIMIT_UNIT_SECOND
;
221 limit
->invert
= true;
222 while (isspace(*++val
));
225 n
= strtol(val
, &e
, 10);
227 if (errno
== ERANGE
|| errno
== EINVAL
)
230 if (*e
&& *e
++ != '/')
236 if (!parse_enum(&u
, e
, fw3_limit_units
, 0, FW3_LIMIT_UNIT_DAY
))
246 fw3_parse_device(void *ptr
, const char *val
, bool is_list
)
249 struct fw3_device dev
= { };
255 put_value(ptr
, &dev
, sizeof(dev
), is_list
);
262 while (isspace(*++val
));
265 if ((p
= strchr(val
, '@')) != NULL
)
268 snprintf(dev
.network
, sizeof(dev
.network
), "%s", p
);
272 snprintf(dev
.name
, sizeof(dev
.name
), "%s", val
);
277 put_value(ptr
, &dev
, sizeof(dev
), is_list
);
282 fw3_parse_address(void *ptr
, const char *val
, bool is_list
)
284 struct fw3_address addr
= { };
287 char *p
= NULL
, *m
= NULL
, *s
, *e
;
293 while (isspace(*++val
));
301 if ((m
= strchr(s
, '/')) != NULL
)
303 else if ((p
= strchr(s
, '-')) != NULL
)
306 if (inet_pton(AF_INET6
, s
, &v6
))
308 addr
.family
= FW3_FAMILY_V6
;
309 addr
.address
.v6
= v6
;
313 if (!inet_pton(AF_INET6
, m
, &v6
))
315 bits
= strtol(m
, &e
, 10);
317 if ((*e
!= 0) || !fw3_bitlen2netmask(addr
.family
, bits
, &v6
))
325 if (!inet_pton(AF_INET6
, p
, &addr
.mask
.v6
))
332 memset(addr
.mask
.v6
.s6_addr
, 0xFF, 16);
335 else if (inet_pton(AF_INET
, s
, &v4
))
337 addr
.family
= FW3_FAMILY_V4
;
338 addr
.address
.v4
= v4
;
342 if (!inet_pton(AF_INET
, m
, &v4
))
344 bits
= strtol(m
, &e
, 10);
346 if ((*e
!= 0) || !fw3_bitlen2netmask(addr
.family
, bits
, &v4
))
354 if (!inet_pton(AF_INET
, p
, &addr
.mask
.v4
))
361 addr
.mask
.v4
.s_addr
= 0xFFFFFFFF;
371 put_value(ptr
, &addr
, sizeof(addr
), is_list
);
380 fw3_parse_network(void *ptr
, const char *val
, bool is_list
)
382 struct fw3_device dev
= { };
383 struct fw3_address
*addr
, *tmp
;
384 LIST_HEAD(addr_list
);
387 if (!fw3_parse_address(ptr
, val
, is_list
))
389 if (!fw3_parse_device(&dev
, val
, false))
392 n_addrs
= fw3_ubus_address(&addr_list
, dev
.name
);
394 list_for_each_entry(addr
, &addr_list
, list
)
396 addr
->invert
= dev
.invert
;
397 addr
->resolved
= true;
400 /* add an empty address member with .set = false, .resolved = true
401 * to signal resolving failure to callers */
404 tmp
= fw3_alloc(sizeof(*tmp
));
405 tmp
->resolved
= true;
407 list_add_tail(&tmp
->list
, &addr_list
);
412 list_splice_tail(&addr_list
, ptr
);
414 else if (!list_empty(&addr_list
))
416 memcpy(ptr
, list_first_entry(&addr_list
, typeof(*addr
), list
),
419 list_for_each_entry_safe(addr
, tmp
, &addr_list
, list
)
428 fw3_parse_mac(void *ptr
, const char *val
, bool is_list
)
430 struct fw3_mac addr
= { };
431 struct ether_addr
*mac
;
436 while (isspace(*++val
));
439 if ((mac
= ether_aton(val
)) != NULL
)
444 put_value(ptr
, &addr
, sizeof(addr
), is_list
);
452 fw3_parse_port(void *ptr
, const char *val
, bool is_list
)
454 struct fw3_port range
= { };
462 while (isspace(*++val
));
465 n
= strtoul(val
, &p
, 10);
467 if (errno
== ERANGE
|| errno
== EINVAL
)
470 if (*p
&& *p
!= '-' && *p
!= ':')
475 m
= strtoul(++p
, NULL
, 10);
477 if (errno
== ERANGE
|| errno
== EINVAL
|| m
< n
)
490 put_value(ptr
, &range
, sizeof(range
), is_list
);
495 fw3_parse_family(void *ptr
, const char *val
, bool is_list
)
497 if (!strcmp(val
, "any") || !strcmp(val
, "*"))
498 *((enum fw3_family
*)ptr
) = FW3_FAMILY_ANY
;
499 else if (!strcmp(val
, "inet") || strrchr(val
, '4'))
500 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V4
;
501 else if (!strcmp(val
, "inet6") || strrchr(val
, '6'))
502 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V6
;
510 fw3_parse_icmptype(void *ptr
, const char *val
, bool is_list
)
512 struct fw3_icmptype icmp
= { };
518 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v4
); i
++)
520 if (!strcmp(val
, fw3_icmptype_list_v4
[i
].name
))
522 icmp
.type
= fw3_icmptype_list_v4
[i
].type
;
523 icmp
.code_min
= fw3_icmptype_list_v4
[i
].code_min
;
524 icmp
.code_max
= fw3_icmptype_list_v4
[i
].code_max
;
531 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v6
); i
++)
533 if (!strcmp(val
, fw3_icmptype_list_v6
[i
].name
))
535 icmp
.type6
= fw3_icmptype_list_v6
[i
].type
;
536 icmp
.code6_min
= fw3_icmptype_list_v6
[i
].code_min
;
537 icmp
.code6_max
= fw3_icmptype_list_v6
[i
].code_max
;
546 i
= strtoul(val
, &p
, 10);
548 if ((p
== val
) || (*p
!= '/' && *p
!= 0) || (i
> 0xFF))
556 i
= strtoul(val
, &p
, 10);
558 if ((p
== val
) || (*p
!= 0) || (i
> 0xFF))
567 icmp
.code_max
= 0xFF;
570 icmp
.type6
= icmp
.type
;
571 icmp
.code6_min
= icmp
.code_min
;
572 icmp
.code6_max
= icmp
.code_max
;
578 icmp
.family
= (v4
&& v6
) ? FW3_FAMILY_ANY
579 : (v6
? FW3_FAMILY_V6
: FW3_FAMILY_V4
);
581 put_value(ptr
, &icmp
, sizeof(icmp
), is_list
);
586 fw3_parse_protocol(void *ptr
, const char *val
, bool is_list
)
588 struct fw3_protocol proto
= { };
589 struct protoent
*ent
;
595 while (isspace(*++val
));
598 if (!strcmp(val
, "all") || !strcmp(val
, "any") || !strcmp(val
, "*"))
601 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
604 else if (!strcmp(val
, "icmpv6"))
608 else if (!strcmp(val
, "tcpudp"))
611 if (put_value(ptr
, &proto
, sizeof(proto
), is_list
))
614 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
620 ent
= getprotobyname(val
);
624 proto
.protocol
= ent
->p_proto
;
625 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
629 proto
.protocol
= strtoul(val
, &e
, 10);
631 if ((e
== val
) || (*e
!= 0))
634 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
639 fw3_parse_ipset_method(void *ptr
, const char *val
, bool is_list
)
641 return parse_enum(ptr
, val
, &fw3_ipset_method_names
[FW3_IPSET_METHOD_BITMAP
],
642 FW3_IPSET_METHOD_BITMAP
, FW3_IPSET_METHOD_LIST
);
646 fw3_parse_ipset_datatype(void *ptr
, const char *val
, bool is_list
)
648 struct fw3_ipset_datatype type
= { };
652 if (!strncmp(val
, "dest_", 5))
657 else if (!strncmp(val
, "dst_", 4))
662 else if (!strncmp(val
, "src_", 4))
668 if (parse_enum(&type
.type
, val
, &fw3_ipset_type_names
[FW3_IPSET_TYPE_IP
],
669 FW3_IPSET_TYPE_IP
, FW3_IPSET_TYPE_SET
))
671 put_value(ptr
, &type
, sizeof(type
), is_list
);
679 fw3_parse_date(void *ptr
, const char *val
, bool is_list
)
681 unsigned int year
= 1970, mon
= 1, day
= 1, hour
= 0, min
= 0, sec
= 0;
682 struct tm tm
= { 0 };
686 year
= strtoul(val
, &p
, 10);
687 if ((*p
!= '-' && *p
) || year
< 1970 || year
> 2038)
692 mon
= strtoul(++p
, &p
, 10);
693 if ((*p
!= '-' && *p
) || mon
> 12)
698 day
= strtoul(++p
, &p
, 10);
699 if ((*p
!= 'T' && *p
) || day
> 31)
704 hour
= strtoul(++p
, &p
, 10);
705 if ((*p
!= ':' && *p
) || hour
> 23)
710 min
= strtoul(++p
, &p
, 10);
711 if ((*p
!= ':' && *p
) || min
> 59)
716 sec
= strtoul(++p
, &p
, 10);
721 tm
.tm_year
= year
- 1900;
728 ts
= mktime(&tm
) - timezone
;
732 gmtime_r(&ts
, (struct tm
*)ptr
);
741 fw3_parse_time(void *ptr
, const char *val
, bool is_list
)
743 unsigned int hour
= 0, min
= 0, sec
= 0;
746 hour
= strtoul(val
, &p
, 10);
747 if (*p
!= ':' || hour
> 23)
750 min
= strtoul(++p
, &p
, 10);
751 if ((*p
!= ':' && *p
) || min
> 59)
756 sec
= strtoul(++p
, &p
, 10);
761 *((int *)ptr
) = 60 * 60 * hour
+ 60 * min
+ sec
;
769 fw3_parse_weekdays(void *ptr
, const char *val
, bool is_list
)
776 fw3_setbit(*(uint8_t *)ptr
, 0);
777 while (isspace(*++val
));
780 if (!(s
= strdup(val
)))
783 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
785 if (!parse_enum(&w
, p
, weekdays
, 1, 7))
787 w
= strtoul(p
, &p
, 10);
789 if (*p
|| w
< 1 || w
> 7)
796 fw3_setbit(*(uint8_t *)ptr
, w
);
804 fw3_parse_monthdays(void *ptr
, const char *val
, bool is_list
)
811 fw3_setbit(*(uint32_t *)ptr
, 0);
812 while (isspace(*++val
));
815 if (!(s
= strdup(val
)))
818 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
820 d
= strtoul(p
, &p
, 10);
822 if (*p
|| d
< 1 || d
> 31)
828 fw3_setbit(*(uint32_t *)ptr
, d
);
836 fw3_parse_include_type(void *ptr
, const char *val
, bool is_list
)
838 return parse_enum(ptr
, val
, include_types
,
839 FW3_INC_TYPE_SCRIPT
, FW3_INC_TYPE_RESTORE
);
843 fw3_parse_reflection_source(void *ptr
, const char *val
, bool is_list
)
845 return parse_enum(ptr
, val
, reflection_sources
,
846 FW3_REFLECTION_INTERNAL
, FW3_REFLECTION_EXTERNAL
);
850 fw3_parse_mark(void *ptr
, const char *val
, bool is_list
)
854 struct fw3_mark
*m
= ptr
;
859 while (isspace(*++val
));
862 if ((s
= strchr(val
, '/')) != NULL
)
865 n
= strtoul(val
, &e
, 0);
871 m
->mask
= 0xFFFFFFFF;
875 n
= strtoul(s
, &e
, 0);
888 fw3_parse_dscp(void *ptr
, const char *val
, bool is_list
)
892 struct fw3_dscp
*d
= ptr
;
897 while (isspace(*++val
));
900 for (n
= 0; n
< sizeof(dscp_classes
) / sizeof(dscp_classes
[0]); n
++)
902 if (strcmp(dscp_classes
[n
].name
, val
))
906 d
->dscp
= dscp_classes
[n
].dscp
;
910 n
= strtoul(val
, &e
, 0);
912 if (e
== val
|| *e
|| n
> 0x3F)
921 fw3_parse_setmatch(void *ptr
, const char *val
, bool is_list
)
923 struct fw3_setmatch
*m
= ptr
;
930 while (isspace(*++val
));
933 if (!(s
= strdup(val
)))
936 if (!(p
= strtok(s
, " \t")))
942 snprintf(m
->name
, sizeof(m
->name
), "%s", p
);
944 for (i
= 0, p
= strtok(NULL
, " \t,");
946 i
++, p
= strtok(NULL
, " \t,"))
948 if (!strncmp(p
, "dest", 4) || !strncmp(p
, "dst", 3))
950 else if (!strncmp(p
, "src", 3))
961 fw3_parse_direction(void *ptr
, const char *val
, bool is_list
)
966 if (!strcmp(val
, "in") || !strcmp(val
, "ingress"))
968 else if (!strcmp(val
, "out") || !strcmp(val
, "egress"))
977 fw3_parse_cthelper(void *ptr
, const char *val
, bool is_list
)
979 struct fw3_cthelpermatch m
= { };
984 while (isspace(*++val
));
990 snprintf(m
.name
, sizeof(m
.name
), "%s", val
);
991 put_value(ptr
, &m
, sizeof(m
), is_list
);
999 fw3_parse_setentry(void *ptr
, const char *val
, bool is_list
)
1001 struct fw3_setentry e
= { };
1004 put_value(ptr
, &e
, sizeof(e
), is_list
);
1011 fw3_parse_options(void *s
, const struct fw3_option
*opts
,
1012 struct uci_section
*section
)
1016 struct uci_element
*e
, *l
;
1017 struct uci_option
*o
;
1018 const struct fw3_option
*opt
;
1019 struct list_head
*dest
;
1022 uci_foreach_element(§ion
->options
, e
)
1024 o
= uci_to_option(e
);
1027 for (opt
= opts
; opt
->name
; opt
++)
1032 if (strcmp(opt
->name
, e
->name
))
1035 if (o
->type
== UCI_TYPE_LIST
)
1037 if (!opt
->elem_size
)
1039 warn_elem(e
, "must not be a list");
1044 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
1046 uci_foreach_element(&o
->v
.list
, l
)
1051 if (!opt
->parse(dest
, l
->name
, true))
1053 warn_elem(e
, "has invalid value '%s'", l
->name
);
1067 if (!opt
->elem_size
)
1069 if (!opt
->parse((char *)s
+ opt
->offset
, o
->v
.string
, false))
1071 warn_elem(e
, "has invalid value '%s'", o
->v
.string
);
1078 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
1080 for (p
= strtok(v
, " \t"); p
!= NULL
; p
= strtok(NULL
, " \t"))
1082 /* If we encounter a sole "!" token, assume that it
1083 * is meant to be part of the next token, so silently
1084 * skip it and remember the state... */
1085 if (!strcmp(p
, "!"))
1091 /* The previous token was a sole "!", rewind pointer
1092 * back by one byte to precede the value with an
1093 * exclamation mark which effectively turns
1094 * ("!", "foo") into ("!foo") */
1101 if (!opt
->parse(dest
, p
, true))
1103 warn_elem(e
, "has invalid value '%s'", p
);
1109 /* The last token was a sole "!" without any subsequent
1110 * text, so pass it to the option parser as-is. */
1111 if (inv
&& !opt
->parse(dest
, "!", true))
1113 warn_elem(e
, "has invalid value '%s'", p
);
1124 warn_elem(e
, "is unknown");
1132 fw3_parse_blob_options(void *s
, const struct fw3_option
*opts
,
1133 struct blob_attr
*a
, const char *name
)
1135 char *p
, *v
, buf
[16];
1138 struct blob_attr
*o
, *e
;
1139 const struct fw3_option
*opt
;
1140 struct list_head
*dest
;
1143 blobmsg_for_each_attr(o
, a
, rem
)
1147 for (opt
= opts
; opt
->name
; opt
++)
1152 if (strcmp(opt
->name
, blobmsg_name(o
)))
1155 if (blobmsg_type(o
) == BLOBMSG_TYPE_ARRAY
)
1157 if (!opt
->elem_size
)
1159 fprintf(stderr
, "%s: '%s' must not be a list\n",
1166 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
1168 blobmsg_for_each_attr(e
, o
, erem
)
1170 if (blobmsg_type(e
) == BLOBMSG_TYPE_INT32
) {
1171 snprintf(buf
, sizeof(buf
), "%d", blobmsg_get_u32(e
));
1173 } else if (blobmsg_type(o
) == BLOBMSG_TYPE_BOOL
) {
1174 snprintf(buf
, sizeof(buf
), "%d", blobmsg_get_bool(o
));
1177 v
= blobmsg_get_string(e
);
1180 if (!opt
->parse(dest
, v
, true))
1182 fprintf(stderr
, "%s: '%s' has invalid value '%s'\n",
1183 name
, opt
->name
, v
);
1192 if (blobmsg_type(o
) == BLOBMSG_TYPE_INT32
) {
1193 snprintf(buf
, sizeof(buf
), "%d", blobmsg_get_u32(o
));
1195 } else if (blobmsg_type(o
) == BLOBMSG_TYPE_BOOL
) {
1196 snprintf(buf
, sizeof(buf
), "%d", blobmsg_get_bool(o
));
1199 v
= blobmsg_get_string(o
);
1205 if (!opt
->elem_size
)
1207 if (!opt
->parse((char *)s
+ opt
->offset
, v
, false))
1209 fprintf(stderr
, "%s: '%s' has invalid value '%s'\n",
1210 name
, opt
->name
, v
);
1216 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
1218 for (p
= strtok(v
, " \t"); p
!= NULL
; p
= strtok(NULL
, " \t"))
1220 if (!opt
->parse(dest
, p
, true))
1222 fprintf(stderr
, "%s: '%s' has invalid value '%s'\n",
1223 name
, opt
->name
, p
);
1235 if (!known
&& strcmp(blobmsg_name(o
), "type"))
1236 fprintf(stderr
, "%s: '%s' is unknown\n", name
, blobmsg_name(o
));
1244 fw3_address_to_string(struct fw3_address
*address
, bool allow_invert
, bool as_cidr
)
1246 char *p
, ip
[INET6_ADDRSTRLEN
];
1247 static char buf
[INET6_ADDRSTRLEN
* 2 + 2];
1248 size_t rem
= sizeof(buf
);
1253 if (address
->invert
&& allow_invert
) {
1259 inet_ntop(address
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
1260 &address
->address
.v4
, ip
, sizeof(ip
));
1262 len
= snprintf(p
, rem
, "%s", ip
);
1264 if (len
< 0 || len
>= rem
)
1272 inet_ntop(address
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
1273 &address
->mask
.v4
, ip
, sizeof(ip
));
1275 snprintf(p
, rem
, "-%s", ip
);
1279 inet_ntop(address
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
1280 &address
->mask
.v4
, ip
, sizeof(ip
));
1282 snprintf(p
, rem
, "/%s", ip
);
1286 snprintf(p
, rem
, "/%u",
1287 fw3_netmask2bitlen(address
->family
, &address
->mask
.v6
));