2 * firewall3 - 3rd OpenWrt UCI firewall implementation
4 * Copyright (C) 2013 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
] = {
86 static const char *limit_units
[] = {
93 static const char *ipset_methods
[] = {
99 static const char *ipset_types
[] = {
107 static const char *weekdays
[] = {
117 static const char *include_types
[] = {
122 static const char *reflection_sources
[] = {
129 fw3_parse_bool(void *ptr
, const char *val
, bool is_list
)
131 if (!strcmp(val
, "true") || !strcmp(val
, "yes") || !strcmp(val
, "1"))
132 *((bool *)ptr
) = true;
134 *((bool *)ptr
) = false;
140 fw3_parse_int(void *ptr
, const char *val
, bool is_list
)
142 int n
= strtol(val
, NULL
, 10);
144 if (errno
== ERANGE
|| errno
== EINVAL
)
153 fw3_parse_string(void *ptr
, const char *val
, bool is_list
)
155 *((char **)ptr
) = (char *)val
;
160 fw3_parse_target(void *ptr
, const char *val
, bool is_list
)
162 return parse_enum(ptr
, val
, &fw3_flag_names
[FW3_FLAG_ACCEPT
],
163 FW3_FLAG_ACCEPT
, FW3_FLAG_SNAT
);
167 fw3_parse_limit(void *ptr
, const char *val
, bool is_list
)
169 struct fw3_limit
*limit
= ptr
;
170 enum fw3_limit_unit u
= FW3_LIMIT_UNIT_SECOND
;
176 limit
->invert
= true;
177 while (isspace(*++val
));
180 n
= strtol(val
, &e
, 10);
182 if (errno
== ERANGE
|| errno
== EINVAL
)
185 if (*e
&& *e
++ != '/')
191 if (!parse_enum(&u
, e
, limit_units
, 0, FW3_LIMIT_UNIT_DAY
))
201 fw3_parse_device(void *ptr
, const char *val
, bool is_list
)
203 struct fw3_device dev
= { };
215 while (isspace(*++val
));
219 snprintf(dev
.name
, sizeof(dev
.name
), "%s", val
);
224 put_value(ptr
, &dev
, sizeof(dev
), is_list
);
229 fw3_parse_address(void *ptr
, const char *val
, bool is_list
)
231 struct fw3_address addr
= { };
240 while (isspace(*++val
));
248 if ((p
= strchr(s
, '/')) != NULL
)
251 m
= strtoul(p
, &e
, 10);
253 if ((e
== p
) || (*e
!= 0))
255 if (strchr(s
, ':') || !inet_pton(AF_INET
, p
, &v4
))
261 for (i
= 0, m
= 32; !(v4
.s_addr
& 1) && (i
< 32); i
++)
268 else if ((p
= strchr(s
, '-')) != NULL
)
272 if (inet_pton(AF_INET6
, p
, &v6
))
274 addr
.family
= FW3_FAMILY_V6
;
275 addr
.address2
.v6
= v6
;
278 else if (inet_pton(AF_INET
, p
, &v4
))
280 addr
.family
= FW3_FAMILY_V4
;
281 addr
.address2
.v4
= v4
;
291 if (inet_pton(AF_INET6
, s
, &v6
))
293 addr
.family
= FW3_FAMILY_V6
;
294 addr
.address
.v6
= v6
;
295 addr
.mask
= (m
>= 0) ? m
: 128;
297 else if (inet_pton(AF_INET
, s
, &v4
))
299 addr
.family
= FW3_FAMILY_V4
;
300 addr
.address
.v4
= v4
;
301 addr
.mask
= (m
>= 0) ? m
: 32;
311 put_value(ptr
, &addr
, sizeof(addr
), is_list
);
316 fw3_parse_network(void *ptr
, const char *val
, bool is_list
)
318 struct fw3_device dev
= { };
319 struct fw3_address
*addr
;
320 struct list_head
*addr_list
;
322 if (!fw3_parse_address(ptr
, val
, is_list
))
324 if (!fw3_parse_device(&dev
, val
, false))
327 addr_list
= fw3_ubus_address(dev
.name
);
331 list_for_each_entry(addr
, addr_list
, list
)
333 addr
->invert
= dev
.invert
;
335 if (!put_value(ptr
, addr
, sizeof(*addr
), is_list
))
339 fw3_ubus_address_free(addr_list
);
347 fw3_parse_mac(void *ptr
, const char *val
, bool is_list
)
349 struct fw3_mac addr
= { };
350 struct ether_addr
*mac
;
355 while (isspace(*++val
));
358 if ((mac
= ether_aton(val
)) != NULL
)
363 put_value(ptr
, &addr
, sizeof(addr
), is_list
);
371 fw3_parse_port(void *ptr
, const char *val
, bool is_list
)
373 struct fw3_port range
= { };
381 while (isspace(*++val
));
384 n
= strtoul(val
, &p
, 10);
386 if (errno
== ERANGE
|| errno
== EINVAL
)
389 if (*p
&& *p
!= '-' && *p
!= ':')
394 m
= strtoul(++p
, NULL
, 10);
396 if (errno
== ERANGE
|| errno
== EINVAL
|| m
< n
)
409 put_value(ptr
, &range
, sizeof(range
), is_list
);
414 fw3_parse_family(void *ptr
, const char *val
, bool is_list
)
416 if (!strcmp(val
, "any"))
417 *((enum fw3_family
*)ptr
) = FW3_FAMILY_ANY
;
418 else if (!strcmp(val
, "inet") || strrchr(val
, '4'))
419 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V4
;
420 else if (!strcmp(val
, "inet6") || strrchr(val
, '6'))
421 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V6
;
429 fw3_parse_icmptype(void *ptr
, const char *val
, bool is_list
)
431 struct fw3_icmptype icmp
= { };
437 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v4
); i
++)
439 if (!strcmp(val
, fw3_icmptype_list_v4
[i
].name
))
441 icmp
.type
= fw3_icmptype_list_v4
[i
].type
;
442 icmp
.code_min
= fw3_icmptype_list_v4
[i
].code_min
;
443 icmp
.code_max
= fw3_icmptype_list_v4
[i
].code_max
;
450 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v6
); i
++)
452 if (!strcmp(val
, fw3_icmptype_list_v6
[i
].name
))
454 icmp
.type6
= fw3_icmptype_list_v6
[i
].type
;
455 icmp
.code6_min
= fw3_icmptype_list_v6
[i
].code_min
;
456 icmp
.code6_max
= fw3_icmptype_list_v6
[i
].code_max
;
465 i
= strtoul(val
, &p
, 10);
467 if ((p
== val
) || (*p
!= '/' && *p
!= 0) || (i
> 0xFF))
475 i
= strtoul(val
, &p
, 10);
477 if ((p
== val
) || (*p
!= 0) || (i
> 0xFF))
486 icmp
.code_max
= 0xFF;
489 icmp
.type6
= icmp
.type
;
490 icmp
.code6_min
= icmp
.code_max
;
491 icmp
.code6_max
= icmp
.code_max
;
497 icmp
.family
= (v4
&& v6
) ? FW3_FAMILY_ANY
498 : (v6
? FW3_FAMILY_V6
: FW3_FAMILY_V4
);
500 put_value(ptr
, &icmp
, sizeof(icmp
), is_list
);
505 fw3_parse_protocol(void *ptr
, const char *val
, bool is_list
)
507 struct fw3_protocol proto
= { };
508 struct protoent
*ent
;
513 while (isspace(*++val
));
516 if (!strcmp(val
, "all"))
521 else if (!strcmp(val
, "icmpv6"))
525 else if (!strcmp(val
, "tcpudp"))
528 if (put_value(ptr
, &proto
, sizeof(proto
), is_list
))
531 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
537 ent
= getprotobyname(val
);
541 proto
.protocol
= ent
->p_proto
;
542 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
546 proto
.protocol
= strtoul(val
, NULL
, 10);
548 if (errno
== ERANGE
|| errno
== EINVAL
)
551 put_value(ptr
, &proto
, sizeof(proto
), is_list
);
556 fw3_parse_ipset_method(void *ptr
, const char *val
, bool is_list
)
558 return parse_enum(ptr
, val
, ipset_methods
,
559 FW3_IPSET_METHOD_BITMAP
, FW3_IPSET_METHOD_LIST
);
563 fw3_parse_ipset_datatype(void *ptr
, const char *val
, bool is_list
)
565 struct fw3_ipset_datatype
*type
= ptr
;
567 if (!strncmp(val
, "dest_", 5))
572 else if (!strncmp(val
, "dst_", 4))
577 else if (!strncmp(val
, "src_", 4))
583 return parse_enum(&type
->type
, val
, ipset_types
,
584 FW3_IPSET_TYPE_IP
, FW3_IPSET_TYPE_SET
);
588 fw3_parse_date(void *ptr
, const char *val
, bool is_list
)
590 unsigned int year
= 1970, mon
= 1, day
= 1, hour
= 0, min
= 0, sec
= 0;
591 struct tm tm
= { 0 };
594 year
= strtoul(val
, &p
, 10);
595 if ((*p
!= '-' && *p
) || year
< 1970 || year
> 2038)
600 mon
= strtoul(++p
, &p
, 10);
601 if ((*p
!= '-' && *p
) || mon
> 12)
606 day
= strtoul(++p
, &p
, 10);
607 if ((*p
!= 'T' && *p
) || day
> 31)
612 hour
= strtoul(++p
, &p
, 10);
613 if ((*p
!= ':' && *p
) || hour
> 23)
618 min
= strtoul(++p
, &p
, 10);
619 if ((*p
!= ':' && *p
) || min
> 59)
624 sec
= strtoul(++p
, &p
, 10);
629 tm
.tm_year
= year
- 1900;
636 if (mktime(&tm
) >= 0)
638 *((struct tm
*)ptr
) = tm
;
647 fw3_parse_time(void *ptr
, const char *val
, bool is_list
)
649 unsigned int hour
= 0, min
= 0, sec
= 0;
652 hour
= strtoul(val
, &p
, 10);
653 if (*p
!= ':' || hour
> 23)
656 min
= strtoul(++p
, &p
, 10);
657 if ((*p
!= ':' && *p
) || min
> 59)
662 sec
= strtoul(++p
, &p
, 10);
667 *((int *)ptr
) = 60 * 60 * hour
+ 60 * min
+ sec
;
675 fw3_parse_weekdays(void *ptr
, const char *val
, bool is_list
)
682 setbit(*(uint8_t *)ptr
, 0);
683 while (isspace(*++val
));
686 if (!(s
= strdup(val
)))
689 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
691 if (!parse_enum(&w
, p
, weekdays
, 1, 7))
693 w
= strtoul(p
, &p
, 10);
695 if (*p
|| w
< 1 || w
> 7)
702 setbit(*(uint8_t *)ptr
, w
);
710 fw3_parse_monthdays(void *ptr
, const char *val
, bool is_list
)
717 setbit(*(uint32_t *)ptr
, 0);
718 while (isspace(*++val
));
721 if (!(s
= strdup(val
)))
724 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
726 d
= strtoul(p
, &p
, 10);
728 if (*p
|| d
< 1 || d
> 31)
734 setbit(*(uint32_t *)ptr
, d
);
742 fw3_parse_include_type(void *ptr
, const char *val
, bool is_list
)
744 return parse_enum(ptr
, val
, include_types
,
745 FW3_INC_TYPE_SCRIPT
, FW3_INC_TYPE_RESTORE
);
749 fw3_parse_reflection_source(void *ptr
, const char *val
, bool is_list
)
751 return parse_enum(ptr
, val
, reflection_sources
,
752 FW3_REFLECTION_INTERNAL
, FW3_REFLECTION_EXTERNAL
);
757 fw3_parse_options(void *s
, const struct fw3_option
*opts
,
758 struct uci_section
*section
)
762 struct uci_element
*e
, *l
;
763 struct uci_option
*o
;
764 const struct fw3_option
*opt
;
765 struct list_head
*dest
;
767 uci_foreach_element(§ion
->options
, e
)
769 o
= uci_to_option(e
);
772 for (opt
= opts
; opt
->name
; opt
++)
777 if (strcmp(opt
->name
, e
->name
))
780 if (o
->type
== UCI_TYPE_LIST
)
784 warn_elem(e
, "must not be a list");
788 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
790 uci_foreach_element(&o
->v
.list
, l
)
795 if (!opt
->parse(dest
, l
->name
, true))
797 warn_elem(e
, "has invalid value '%s'", l
->name
);
812 if (!opt
->parse((char *)s
+ opt
->offset
, o
->v
.string
, false))
813 warn_elem(e
, "has invalid value '%s'", o
->v
.string
);
817 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
819 for (p
= strtok(v
, " \t"); p
!= NULL
; p
= strtok(NULL
, " \t"))
821 if (!opt
->parse(dest
, p
, true))
823 warn_elem(e
, "has invalid value '%s'", p
);
835 warn_elem(e
, "is unknown");
841 fw3_format_in_out(struct fw3_device
*in
, struct fw3_device
*out
)
844 fw3_pr(" %s-i %s", in
->invert
? "! " : "", in
->name
);
846 if (out
&& !out
->any
)
847 fw3_pr(" %s-o %s", out
->invert
? "! " : "", out
->name
);
851 fw3_format_src_dest(struct fw3_address
*src
, struct fw3_address
*dest
)
853 char s
[INET6_ADDRSTRLEN
];
855 if ((src
&& src
->range
) || (dest
&& dest
->range
))
856 fw3_pr(" -m iprange");
862 inet_ntop(src
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
863 &src
->address
.v4
, s
, sizeof(s
));
865 fw3_pr(" %s--src-range %s", src
->invert
? "! " : "", s
);
867 inet_ntop(src
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
868 &src
->address2
.v4
, s
, sizeof(s
));
874 inet_ntop(src
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
875 &src
->address
.v4
, s
, sizeof(s
));
877 fw3_pr(" %s-s %s/%u", src
->invert
? "! " : "", s
, src
->mask
);
881 if (dest
&& dest
->set
)
885 inet_ntop(dest
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
886 &dest
->address
.v4
, s
, sizeof(s
));
888 fw3_pr(" %s--dst-range %s", dest
->invert
? "! " : "", s
);
890 inet_ntop(dest
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
891 &dest
->address2
.v4
, s
, sizeof(s
));
897 inet_ntop(dest
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
898 &dest
->address
.v4
, s
, sizeof(s
));
900 fw3_pr(" %s-d %s/%u", dest
->invert
? "! " : "", s
, dest
->mask
);
906 fw3_format_sport_dport(struct fw3_port
*sp
, struct fw3_port
*dp
)
910 if (sp
->port_min
== sp
->port_max
)
911 fw3_pr(" %s--sport %u", sp
->invert
? "! " : "", sp
->port_min
);
913 fw3_pr(" %s--sport %u:%u",
914 sp
->invert
? "! " : "", sp
->port_min
, sp
->port_max
);
919 if (dp
->port_min
== dp
->port_max
)
920 fw3_pr(" %s--dport %u", dp
->invert
? "! " : "", dp
->port_min
);
922 fw3_pr(" %s--dport %u:%u",
923 dp
->invert
? "! " : "", dp
->port_min
, dp
->port_max
);
928 fw3_format_mac(struct fw3_mac
*mac
)
933 fw3_pr(" -m mac %s--mac-source %s",
934 mac
->invert
? "! " : "", ether_ntoa(&mac
->mac
));
938 fw3_format_protocol(struct fw3_protocol
*proto
, enum fw3_family family
)
945 pr
= proto
->protocol
;
947 if (pr
== 1 && family
== FW3_FAMILY_V6
)
953 fw3_pr(" %s-p %u", proto
->invert
? "! " : "", pr
);
957 fw3_format_icmptype(struct fw3_icmptype
*icmp
, enum fw3_family family
)
962 if (family
!= FW3_FAMILY_V6
)
964 if (icmp
->code_min
== 0 && icmp
->code_max
== 0xFF)
965 fw3_pr(" %s--icmp-type %u", icmp
->invert
? "! " : "", icmp
->type
);
967 fw3_pr(" %s--icmp-type %u/%u",
968 icmp
->invert
? "! " : "", icmp
->type
, icmp
->code_min
);
972 if (icmp
->code6_min
== 0 && icmp
->code6_max
== 0xFF)
973 fw3_pr(" %s--icmpv6-type %u", icmp
->invert
? "! " : "", icmp
->type6
);
975 fw3_pr(" %s--icmpv6-type %u/%u",
976 icmp
->invert
? "! " : "", icmp
->type6
, icmp
->code6_min
);
981 fw3_format_limit(struct fw3_limit
*limit
)
988 fw3_pr(" -m limit %s--limit %u/%s",
989 limit
->invert
? "! " : "",
990 limit
->rate
, limit_units
[limit
->unit
]);
992 if (limit
->burst
> 0)
993 fw3_pr(" --limit-burst %u", limit
->burst
);
998 fw3_format_ipset(struct fw3_ipset
*ipset
, bool invert
)
1001 const char *name
= NULL
;
1002 struct fw3_ipset_datatype
*type
;
1007 if (ipset
->external
&& *ipset
->external
)
1008 name
= ipset
->external
;
1012 fw3_pr(" -m set %s--match-set %s", invert
? "! " : "", name
);
1014 list_for_each_entry(type
, &ipset
->datatypes
, list
)
1016 fw3_pr("%c%s", first
? ' ' : ',', type
->dest
? "dst" : "src");
1022 fw3_format_time(struct fw3_time
*time
)
1025 struct tm empty
= { 0 };
1026 char buf
[sizeof("9999-99-99T23:59:59\0")];
1027 bool d1
= memcmp(&time
->datestart
, &empty
, sizeof(empty
));
1028 bool d2
= memcmp(&time
->datestop
, &empty
, sizeof(empty
));
1031 if (!d1
&& !d2
&& !time
->timestart
&& !time
->timestop
&&
1032 !(time
->monthdays
& 0xFFFFFFFE) && !(time
->weekdays
& 0xFE))
1044 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestart
);
1045 fw3_pr(" --datestart %s", buf
);
1050 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestop
);
1051 fw3_pr(" --datestop %s", buf
);
1054 if (time
->timestart
)
1056 fw3_pr(" --timestart %02d:%02d:%02d",
1057 time
->timestart
/ 3600,
1058 time
->timestart
% 3600 / 60,
1059 time
->timestart
% 60);
1064 fw3_pr(" --timestop %02d:%02d:%02d",
1065 time
->timestop
/ 3600,
1066 time
->timestop
% 3600 / 60,
1067 time
->timestop
% 60);
1070 if (time
->monthdays
& 0xFFFFFFFE)
1072 fw3_pr(" %s--monthdays", hasbit(time
->monthdays
, 0) ? "! " : "");
1074 for (i
= 1, first
= true; i
< 32; i
++)
1076 if (hasbit(time
->monthdays
, i
))
1078 fw3_pr("%c%u", first
? ' ' : ',', i
);
1084 if (time
->weekdays
& 0xFE)
1086 fw3_pr(" %s--weekdays", hasbit(time
->weekdays
, 0) ? "! " : "");
1088 for (i
= 1, first
= true; i
< 8; i
++)
1090 if (hasbit(time
->weekdays
, i
))
1092 fw3_pr("%c%u", first
? ' ' : ',', i
);
1100 __fw3_format_comment(const char *comment
, ...)
1106 if (!comment
|| !*comment
)
1109 fw3_pr(" -m comment --comment \"");
1113 va_start(ap
, comment
);
1139 c
= va_arg(ap
, const char *);
1149 fw3_format_extra(const char *extra
)
1151 if (!extra
|| !*extra
)
1154 fw3_pr(" %s", extra
);