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.
22 fw3_parse_bool(void *ptr
, const char *val
)
24 if (!strcmp(val
, "true") || !strcmp(val
, "yes") || !strcmp(val
, "1"))
25 *((bool *)ptr
) = true;
27 *((bool *)ptr
) = false;
33 fw3_parse_int(void *ptr
, const char *val
)
35 int n
= strtol(val
, NULL
, 10);
37 if (errno
== ERANGE
|| errno
== EINVAL
)
46 fw3_parse_string(void *ptr
, const char *val
)
48 *((char **)ptr
) = (char *)val
;
53 fw3_parse_target(void *ptr
, const char *val
)
55 if (!strcmp(val
, "ACCEPT"))
57 *((enum fw3_target
*)ptr
) = FW3_TARGET_ACCEPT
;
60 else if (!strcmp(val
, "REJECT"))
62 *((enum fw3_target
*)ptr
) = FW3_TARGET_REJECT
;
65 else if (!strcmp(val
, "DROP"))
67 *((enum fw3_target
*)ptr
) = FW3_TARGET_DROP
;
70 else if (!strcmp(val
, "NOTRACK"))
72 *((enum fw3_target
*)ptr
) = FW3_TARGET_NOTRACK
;
75 else if (!strcmp(val
, "DNAT"))
77 *((enum fw3_target
*)ptr
) = FW3_TARGET_DNAT
;
80 else if (!strcmp(val
, "SNAT"))
82 *((enum fw3_target
*)ptr
) = FW3_TARGET_SNAT
;
90 fw3_parse_limit(void *ptr
, const char *val
)
92 struct fw3_limit
*limit
= ptr
;
93 enum fw3_limit_unit u
= FW3_LIMIT_UNIT_SECOND
;
100 while (isspace(*++val
));
103 n
= strtol(val
, &e
, 10);
105 if (errno
== ERANGE
|| errno
== EINVAL
)
108 if (*e
&& *e
++ != '/')
114 if (!strncmp(e
, "second", strlen(e
)))
115 u
= FW3_LIMIT_UNIT_SECOND
;
116 else if (!strncmp(e
, "minute", strlen(e
)))
117 u
= FW3_LIMIT_UNIT_MINUTE
;
118 else if (!strncmp(e
, "hour", strlen(e
)))
119 u
= FW3_LIMIT_UNIT_HOUR
;
120 else if (!strncmp(e
, "day", strlen(e
)))
121 u
= FW3_LIMIT_UNIT_DAY
;
132 fw3_parse_device(void *ptr
, const char *val
)
134 struct fw3_device
*dev
= ptr
;
146 while (isspace(*++val
));
150 snprintf(dev
->name
, sizeof(dev
->name
), "%s", val
);
159 fw3_parse_address(void *ptr
, const char *val
)
161 struct fw3_address
*addr
= ptr
;
170 while (isspace(*++val
));
178 if ((p
= strchr(s
, '/')) != NULL
)
181 m
= strtoul(p
, &e
, 10);
183 if ((e
== p
) || (*e
!= 0))
185 if (strchr(s
, ':') || !inet_pton(AF_INET
, p
, &v4
))
191 for (i
= 0, m
= 32; !(v4
.s_addr
& 1) && (i
< 32); i
++)
199 if (inet_pton(AF_INET6
, s
, &v6
))
201 addr
->family
= FW3_FAMILY_V6
;
202 addr
->address
.v6
= v6
;
203 addr
->mask
= (m
>= 0) ? m
: 128;
205 else if (inet_pton(AF_INET
, s
, &v4
))
207 addr
->family
= FW3_FAMILY_V4
;
208 addr
->address
.v4
= v4
;
209 addr
->mask
= (m
>= 0) ? m
: 32;
223 fw3_parse_mac(void *ptr
, const char *val
)
225 struct fw3_mac
*addr
= ptr
;
226 struct ether_addr
*mac
;
231 while (isspace(*++val
));
234 if ((mac
= ether_aton(val
)) != NULL
)
245 fw3_parse_port(void *ptr
, const char *val
)
247 struct fw3_port
*range
= ptr
;
254 range
->invert
= true;
255 while (isspace(*++val
));
258 n
= strtoul(val
, &p
, 10);
260 if (errno
== ERANGE
|| errno
== EINVAL
)
263 if (*p
&& *p
!= '-' && *p
!= ':')
268 m
= strtoul(++p
, NULL
, 10);
270 if (errno
== ERANGE
|| errno
== EINVAL
|| m
< n
)
287 fw3_parse_family(void *ptr
, const char *val
)
289 if (!strcmp(val
, "any"))
290 *((enum fw3_family
*)ptr
) = FW3_FAMILY_ANY
;
291 else if (!strcmp(val
, "inet") || strrchr(val
, '4'))
292 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V4
;
293 else if (!strcmp(val
, "inet6") || strrchr(val
, '6'))
294 *((enum fw3_family
*)ptr
) = FW3_FAMILY_V6
;
302 fw3_parse_icmptype(void *ptr
, const char *val
)
304 struct fw3_icmptype
*icmp
= ptr
;
310 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v4
); i
++)
312 if (!strcmp(val
, fw3_icmptype_list_v4
[i
].name
))
314 icmp
->type
= fw3_icmptype_list_v4
[i
].type
;
315 icmp
->code_min
= fw3_icmptype_list_v4
[i
].code_min
;
316 icmp
->code_max
= fw3_icmptype_list_v4
[i
].code_max
;
323 for (i
= 0; i
< ARRAY_SIZE(fw3_icmptype_list_v6
); i
++)
325 if (!strcmp(val
, fw3_icmptype_list_v6
[i
].name
))
327 icmp
->type6
= fw3_icmptype_list_v6
[i
].type
;
328 icmp
->code6_min
= fw3_icmptype_list_v6
[i
].code_min
;
329 icmp
->code6_max
= fw3_icmptype_list_v6
[i
].code_max
;
338 i
= strtoul(val
, &p
, 10);
340 if ((p
== val
) || (*p
!= '/' && *p
!= 0) || (i
> 0xFF))
348 i
= strtoul(val
, &p
, 10);
350 if ((p
== val
) || (*p
!= 0) || (i
> 0xFF))
359 icmp
->code_max
= 0xFF;
362 icmp
->type6
= icmp
->type
;
363 icmp
->code6_min
= icmp
->code_max
;
364 icmp
->code6_max
= icmp
->code_max
;
370 icmp
->family
= (v4
&& v6
) ? FW3_FAMILY_ANY
371 : (v6
? FW3_FAMILY_V6
: FW3_FAMILY_V4
);
377 fw3_parse_protocol(void *ptr
, const char *val
)
379 struct fw3_protocol
*proto
= ptr
;
380 struct protoent
*ent
;
384 proto
->invert
= true;
385 while (isspace(*++val
));
388 if (!strcmp(val
, "all"))
393 else if (!strcmp(val
, "icmpv6"))
398 ent
= getprotobyname(val
);
402 proto
->protocol
= ent
->p_proto
;
406 proto
->protocol
= strtoul(val
, NULL
, 10);
407 return (errno
!= ERANGE
&& errno
!= EINVAL
);
411 fw3_parse_ipset_method(void *ptr
, const char *val
)
413 if (!strncmp(val
, "bitmap", strlen(val
)))
415 *((enum fw3_ipset_method
*)ptr
) = FW3_IPSET_METHOD_BITMAP
;
418 else if (!strncmp(val
, "hash", strlen(val
)))
420 *((enum fw3_ipset_method
*)ptr
) = FW3_IPSET_METHOD_HASH
;
423 else if (!strncmp(val
, "list", strlen(val
)))
425 *((enum fw3_ipset_method
*)ptr
) = FW3_IPSET_METHOD_LIST
;
433 fw3_parse_ipset_datatype(void *ptr
, const char *val
)
435 struct fw3_ipset_datatype
*type
= ptr
;
437 if (!strncmp(val
, "dest_", 5))
442 else if (!strncmp(val
, "dst_", 4))
447 else if (!strncmp(val
, "src_", 4))
453 if (!strncmp(val
, "ip", strlen(val
)))
455 type
->type
= FW3_IPSET_TYPE_IP
;
458 else if (!strncmp(val
, "port", strlen(val
)))
460 type
->type
= FW3_IPSET_TYPE_PORT
;
463 else if (!strncmp(val
, "mac", strlen(val
)))
465 type
->type
= FW3_IPSET_TYPE_MAC
;
468 else if (!strncmp(val
, "net", strlen(val
)))
470 type
->type
= FW3_IPSET_TYPE_NET
;
473 else if (!strncmp(val
, "set", strlen(val
)))
475 type
->type
= FW3_IPSET_TYPE_SET
;
484 fw3_parse_options(void *s
,
485 struct fw3_option
*opts
, int n
,
486 struct uci_section
*section
)
491 struct uci_element
*e
, *l
;
492 struct uci_option
*o
;
493 struct fw3_option
*opt
;
494 struct list_head
*item
;
495 struct list_head
*dest
;
497 uci_foreach_element(§ion
->options
, e
)
499 o
= uci_to_option(e
);
502 for (i
= 0; i
< n
; i
++)
506 if (!opt
->parse
|| !opt
->name
)
509 if (strcmp(opt
->name
, e
->name
))
512 if (o
->type
== UCI_TYPE_LIST
)
516 warn_elem(e
, "must not be a list");
520 uci_foreach_element(&o
->v
.list
, l
)
525 item
= malloc(opt
->elem_size
);
530 memset(item
, 0, opt
->elem_size
);
532 if (!opt
->parse(item
, l
->name
))
534 warn_elem(e
, "has invalid value '%s'", l
->name
);
539 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
540 list_add_tail(item
, dest
);
551 if (!opt
->parse((char *)s
+ opt
->offset
, o
->v
.string
))
552 warn_elem(e
, "has invalid value '%s'", o
->v
.string
);
556 for (p
= strtok(o
->v
.string
, " \t");
558 p
= strtok(NULL
, " \t"))
560 item
= malloc(opt
->elem_size
);
565 memset(item
, 0, opt
->elem_size
);
567 if (!opt
->parse(item
, p
))
569 warn_elem(e
, "has invalid value '%s'", p
);
574 dest
= (struct list_head
*)((char *)s
+ opt
->offset
);
575 list_add_tail(item
, dest
);
585 warn_elem(e
, "is unknown");
591 fw3_format_in_out(struct fw3_device
*in
, struct fw3_device
*out
)
594 fw3_pr(" %s-i %s", in
->invert
? "! " : "", in
->name
);
596 if (out
&& !out
->any
)
597 fw3_pr(" %s-o %s", out
->invert
? "! " : "", out
->name
);
601 fw3_format_src_dest(struct fw3_address
*src
, struct fw3_address
*dest
)
603 char s
[INET6_ADDRSTRLEN
];
607 inet_ntop(src
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
608 &src
->address
.v4
, s
, sizeof(s
));
610 fw3_pr(" %s-s %s/%u", src
->invert
? "! " : "", s
, src
->mask
);
613 if (dest
&& dest
->set
)
615 inet_ntop(dest
->family
== FW3_FAMILY_V4
? AF_INET
: AF_INET6
,
616 &dest
->address
.v4
, s
, sizeof(s
));
618 fw3_pr(" %s-d %s/%u", dest
->invert
? "! " : "", s
, dest
->mask
);
623 fw3_format_sport_dport(struct fw3_port
*sp
, struct fw3_port
*dp
)
627 if (sp
->port_min
== sp
->port_max
)
628 fw3_pr(" %s--sport %u", sp
->invert
? "! " : "", sp
->port_min
);
630 fw3_pr(" %s--sport %u:%u",
631 sp
->invert
? "! " : "", sp
->port_min
, sp
->port_max
);
636 if (dp
->port_min
== dp
->port_max
)
637 fw3_pr(" %s--dport %u", dp
->invert
? "! " : "", dp
->port_min
);
639 fw3_pr(" %s--dport %u:%u",
640 dp
->invert
? "! " : "", dp
->port_min
, dp
->port_max
);
645 fw3_format_mac(struct fw3_mac
*mac
)
650 fw3_pr(" -m mac %s--mac-source %s",
651 mac
->invert
? "! " : "", ether_ntoa(&mac
->mac
));
655 fw3_format_protocol(struct fw3_protocol
*proto
, enum fw3_family family
)
662 pr
= proto
->protocol
;
664 if (pr
== 1 && family
== FW3_FAMILY_V6
)
670 fw3_pr(" %s-p %u", proto
->invert
? "! " : "", pr
);
674 fw3_format_icmptype(struct fw3_icmptype
*icmp
, enum fw3_family family
)
679 if (family
!= FW3_FAMILY_V6
)
681 if (icmp
->code_min
== 0 && icmp
->code_max
== 0xFF)
682 fw3_pr(" %s--icmp-type %u", icmp
->invert
? "! " : "", icmp
->type
);
684 fw3_pr(" %s--icmp-type %u/%u",
685 icmp
->invert
? "! " : "", icmp
->type
, icmp
->code_min
);
689 if (icmp
->code6_min
== 0 && icmp
->code6_max
== 0xFF)
690 fw3_pr(" %s--icmpv6-type %u", icmp
->invert
? "! " : "", icmp
->type6
);
692 fw3_pr(" %s--icmpv6-type %u/%u",
693 icmp
->invert
? "! " : "", icmp
->type6
, icmp
->code6_min
);
698 fw3_format_limit(struct fw3_limit
*limit
)
703 const char *units
[] = {
704 [FW3_LIMIT_UNIT_SECOND
] = "second",
705 [FW3_LIMIT_UNIT_MINUTE
] = "minute",
706 [FW3_LIMIT_UNIT_HOUR
] = "hour",
707 [FW3_LIMIT_UNIT_DAY
] = "day",
712 fw3_pr(" -m limit %s--limit %u/%s",
713 limit
->invert
? "! " : "", limit
->rate
, units
[limit
->unit
]);
715 if (limit
->burst
> 0)
716 fw3_pr(" --limit-burst %u", limit
->burst
);
721 fw3_format_ipset(struct fw3_ipset
*ipset
, bool invert
)
724 const char *name
= NULL
;
725 struct fw3_ipset_datatype
*type
;
730 if (ipset
->external
&& *ipset
->external
)
731 name
= ipset
->external
;
735 fw3_pr(" -m set %s--match-set %s", invert
? "! " : "", name
);
737 list_for_each_entry(type
, &ipset
->datatypes
, list
)
739 fw3_pr("%c%s", first
? ' ' : ',', type
->dest
? "dst" : "src");
745 __fw3_format_comment(const char *comment
, ...)
751 if (!comment
|| !*comment
)
754 fw3_pr(" -m comment --comment \"");
758 va_start(ap
, comment
);
784 c
= va_arg(ap
, const char *);
794 fw3_format_extra(const char *extra
)
796 if (!extra
|| !*extra
)
799 fw3_pr(" %s", extra
);