2 * firewall3 - 3rd OpenWrt UCI firewall implementation
4 * Copyright (C) 2013 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.
22 static struct option base_opts
[] = {
23 { .name
= "match", .has_arg
= 1, .val
= 'm' },
24 { .name
= "jump", .has_arg
= 1, .val
= 'j' },
28 static struct xtables_globals xtg
= {
30 .program_version
= "4",
31 .orig_opts
= base_opts
,
32 #if XTABLES_VERSION_CODE > 10
33 .compat_rev
= xtables_compatible_revision
,
37 static struct xtables_globals xtg6
= {
39 .program_version
= "6",
40 .orig_opts
= base_opts
,
41 #if XTABLES_VERSION_CODE > 10
42 .compat_rev
= xtables_compatible_revision
,
49 struct xtables_match
**matches
;
50 struct xtables_target
**targets
;
51 void (*register_match
)(struct xtables_match
*);
52 void (*register_target
)(struct xtables_target
*);
56 /* Required by certain extensions like SNAT and DNAT */
57 int kernel_version
= 0;
60 get_kernel_version(void)
62 static struct utsname uts
;
63 int x
= 0, y
= 0, z
= 0;
65 if (uname(&uts
) == -1)
66 sprintf(uts
.release
, "3.0.0");
68 sscanf(uts
.release
, "%d.%d.%d", &x
, &y
, &z
);
69 kernel_version
= 0x10000 * x
+ 0x100 * y
+ z
;
72 static void fw3_init_extensions(void)
82 struct fw3_ipt_handle
*
83 fw3_ipt_open(enum fw3_family family
, enum fw3_table table
)
86 struct fw3_ipt_handle
*h
;
88 h
= fw3_alloc(sizeof(*h
));
92 if (family
== FW3_FAMILY_V6
)
95 h
->family
= FW3_FAMILY_V6
;
97 h
->handle
= ip6tc_init(fw3_flag_names
[table
]);
99 xtables_set_params(&xtg6
);
100 xtables_set_nfproto(NFPROTO_IPV6
);
105 h
->family
= FW3_FAMILY_V4
;
107 h
->handle
= iptc_init(fw3_flag_names
[table
]);
109 xtables_set_params(&xtg
);
110 xtables_set_nfproto(NFPROTO_IPV4
);
120 fw3_init_extensions();
122 if (xext
.register_match
)
123 for (i
= 0; i
< xext
.mcount
; i
++)
124 xext
.register_match(xext
.matches
[i
]);
126 if (xext
.register_target
)
127 for (i
= 0; i
< xext
.tcount
; i
++)
128 xext
.register_target(xext
.targets
[i
]);
134 debug(struct fw3_ipt_handle
*h
, const char *fmt
, ...)
138 printf("%s -t %s ", (h
->family
== FW3_FAMILY_V6
) ? "ip6tables" : "iptables",
139 fw3_flag_names
[h
->table
]);
147 fw3_ipt_set_policy(struct fw3_ipt_handle
*h
, const char *chain
,
148 enum fw3_flag policy
)
151 debug(h
, "-P %s %s\n", chain
, fw3_flag_names
[policy
]);
154 if (h
->family
== FW3_FAMILY_V6
)
155 ip6tc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
158 iptc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
162 fw3_ipt_flush_chain(struct fw3_ipt_handle
*h
, const char *chain
)
165 debug(h
, "-F %s\n", chain
);
168 if (h
->family
== FW3_FAMILY_V6
)
169 ip6tc_flush_entries(chain
, h
->handle
);
172 iptc_flush_entries(chain
, h
->handle
);
176 delete_rules(struct fw3_ipt_handle
*h
, const char *target
)
179 const struct ipt_entry
*e
;
185 if (h
->family
== FW3_FAMILY_V6
)
187 for (chain
= ip6tc_first_chain(h
->handle
);
189 chain
= ip6tc_next_chain(h
->handle
))
194 const struct ip6t_entry
*e6
;
195 for (num
= 0, e6
= ip6tc_first_rule(chain
, h
->handle
);
197 num
++, e6
= ip6tc_next_rule(e6
, h
->handle
))
199 t
= ip6tc_get_target(e6
, h
->handle
);
201 if (*t
&& !strcmp(t
, target
))
204 debug(h
, "-D %s %u\n", chain
, num
+ 1);
206 ip6tc_delete_num_entry(chain
, num
, h
->handle
);
217 for (chain
= iptc_first_chain(h
->handle
);
219 chain
= iptc_next_chain(h
->handle
))
224 for (num
= 0, e
= iptc_first_rule(chain
, h
->handle
);
226 num
++, e
= iptc_next_rule(e
, h
->handle
))
228 t
= iptc_get_target(e
, h
->handle
);
230 if (*t
&& !strcmp(t
, target
))
233 debug(h
, "-D %s %u\n", chain
, num
+ 1);
235 iptc_delete_num_entry(chain
, num
, h
->handle
);
246 fw3_ipt_delete_chain(struct fw3_ipt_handle
*h
, const char *chain
)
248 delete_rules(h
, chain
);
251 debug(h
, "-X %s\n", chain
);
254 if (h
->family
== FW3_FAMILY_V6
)
255 ip6tc_delete_chain(chain
, h
->handle
);
258 iptc_delete_chain(chain
, h
->handle
);
262 get_rule_id(const void *base
, unsigned int start
, unsigned int end
)
266 const struct xt_entry_match
*em
;
268 for (i
= start
; i
< end
; i
+= em
->u
.match_size
)
272 if (strcmp(em
->u
.user
.name
, "id"))
275 memcpy(&id
, em
->data
, sizeof(id
));
277 if ((id
& FW3_ID_MASK
) != FW3_ID_MAGIC
)
280 return (id
& ~FW3_ID_MASK
);
287 fw3_ipt_delete_id_rules(struct fw3_ipt_handle
*h
, const char *chain
)
290 const struct ipt_entry
*e
;
295 if (h
->family
== FW3_FAMILY_V6
)
297 if (!ip6tc_is_chain(chain
, h
->handle
))
303 const struct ip6t_entry
*e6
;
304 for (num
= 0, e6
= ip6tc_first_rule(chain
, h
->handle
);
306 num
++, e6
= ip6tc_next_rule(e6
, h
->handle
))
308 id
= get_rule_id(e6
, sizeof(*e6
), e6
->target_offset
);
313 debug(h
, "-D %s %u\n", chain
, num
+ 1);
315 ip6tc_delete_num_entry(chain
, num
, h
->handle
);
325 if (!iptc_is_chain(chain
, h
->handle
))
331 for (num
= 0, e
= iptc_first_rule(chain
, h
->handle
);
333 num
++, e
= iptc_next_rule(e
, h
->handle
))
335 id
= get_rule_id(e
, sizeof(*e
), e
->target_offset
);
340 debug(h
, "-D %s %u\n", chain
, num
+ 1);
342 iptc_delete_num_entry(chain
, num
, h
->handle
);
352 fw3_ipt_create_chain(struct fw3_ipt_handle
*h
, const char *fmt
, ...)
358 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
362 debug(h
, "-N %s\n", buf
);
364 iptc_create_chain(buf
, h
->handle
);
368 fw3_ipt_flush(struct fw3_ipt_handle
*h
)
373 if (h
->family
== FW3_FAMILY_V6
)
375 for (chain
= ip6tc_first_chain(h
->handle
);
377 chain
= ip6tc_next_chain(h
->handle
))
379 ip6tc_flush_entries(chain
, h
->handle
);
382 for (chain
= ip6tc_first_chain(h
->handle
);
384 chain
= ip6tc_next_chain(h
->handle
))
386 ip6tc_delete_chain(chain
, h
->handle
);
392 for (chain
= iptc_first_chain(h
->handle
);
394 chain
= iptc_next_chain(h
->handle
))
396 iptc_flush_entries(chain
, h
->handle
);
399 for (chain
= iptc_first_chain(h
->handle
);
401 chain
= iptc_next_chain(h
->handle
))
403 iptc_delete_chain(chain
, h
->handle
);
409 chain_is_empty(struct fw3_ipt_handle
*h
, const char *chain
)
412 if (h
->family
== FW3_FAMILY_V6
)
413 return (!ip6tc_builtin(chain
, h
->handle
) &&
414 !ip6tc_first_rule(chain
, h
->handle
));
417 return (!iptc_builtin(chain
, h
->handle
) &&
418 !iptc_first_rule(chain
, h
->handle
));
422 fw3_ipt_gc(struct fw3_ipt_handle
*h
)
428 if (h
->family
== FW3_FAMILY_V6
)
433 for (chain
= ip6tc_first_chain(h
->handle
);
435 chain
= ip6tc_next_chain(h
->handle
))
437 if (!chain_is_empty(h
, chain
))
440 fw3_ipt_delete_chain(h
, chain
);
452 for (chain
= iptc_first_chain(h
->handle
);
454 chain
= iptc_next_chain(h
->handle
))
456 warn("C=%s\n", chain
);
458 if (!chain_is_empty(h
, chain
))
461 warn("D=%s\n", chain
);
463 fw3_ipt_delete_chain(h
, chain
);
472 fw3_ipt_commit(struct fw3_ipt_handle
*h
)
477 if (h
->family
== FW3_FAMILY_V6
)
479 rv
= ip6tc_commit(h
->handle
);
481 warn("ip6tc_commit(): %s", ip6tc_strerror(errno
));
486 rv
= iptc_commit(h
->handle
);
488 warn("iptc_commit(): %s", iptc_strerror(errno
));
493 fw3_ipt_close(struct fw3_ipt_handle
*h
)
498 struct fw3_ipt_rule
*
499 fw3_ipt_rule_new(struct fw3_ipt_handle
*h
)
501 struct fw3_ipt_rule
*r
;
503 r
= fw3_alloc(sizeof(*r
));
507 r
->argv
= fw3_alloc(sizeof(char *));
508 r
->argv
[r
->argc
++] = "fw3";
515 is_chain(struct fw3_ipt_handle
*h
, const char *name
)
518 if (h
->family
== FW3_FAMILY_V6
)
519 return ip6tc_is_chain(name
, h
->handle
);
522 return iptc_is_chain(name
, h
->handle
);
526 get_protoname(struct fw3_ipt_rule
*r
)
528 const struct xtables_pprot
*pp
;
531 for (pp
= xtables_chain_protos
; pp
->name
; pp
++)
532 if (pp
->num
== r
->protocol
)
533 return (char *)pp
->name
;
539 load_extension(struct fw3_ipt_handle
*h
, const char *name
)
543 const char *pfx
= (h
->family
== FW3_FAMILY_V6
) ? "libip6t" : "libipt";
547 snprintf(path
, sizeof(path
), "/usr/lib/iptables/libxt_%s.so", name
);
548 if (!(lib
= dlopen(path
, RTLD_NOW
)))
550 snprintf(path
, sizeof(path
), "/usr/lib/iptables/%s_%s.so", pfx
, name
);
551 lib
= dlopen(path
, RTLD_NOW
);
559 static struct xtables_match
*
560 find_match(struct fw3_ipt_rule
*r
, const char *name
)
562 struct xtables_match
*m
;
564 m
= xtables_find_match(name
, XTF_DONT_LOAD
, &r
->matches
);
566 if (!m
&& load_extension(r
->h
, name
))
567 m
= xtables_find_match(name
, XTF_DONT_LOAD
, &r
->matches
);
573 init_match(struct fw3_ipt_rule
*r
, struct xtables_match
*m
, bool no_clone
)
576 struct xtables_globals
*g
;
581 s
= XT_ALIGN(sizeof(struct xt_entry_match
)) + m
->size
;
585 fw3_xt_set_match_name(m
);
587 m
->m
->u
.user
.revision
= m
->revision
;
588 m
->m
->u
.match_size
= s
;
590 /* free previous userspace data */
591 fw3_xt_free_match_udata(m
);
596 /* don't merge options if no_clone is set and this match is a clone */
597 if (no_clone
&& (m
== m
->next
))
600 /* merge option table */
601 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
602 fw3_xt_merge_match_options(g
, m
);
606 need_protomatch(struct fw3_ipt_rule
*r
, const char *pname
)
611 if (!xtables_find_match(pname
, XTF_DONT_LOAD
, NULL
))
614 return !r
->protocol_loaded
;
617 static struct xtables_match
*
618 load_protomatch(struct fw3_ipt_rule
*r
)
620 const char *pname
= get_protoname(r
);
622 if (!need_protomatch(r
, pname
))
625 return find_match(r
, pname
);
628 static struct xtables_target
*
629 find_target(struct fw3_ipt_rule
*r
, const char *name
)
631 struct xtables_target
*t
;
633 if (is_chain(r
->h
, name
)) {
634 t
= xtables_find_target(XT_STANDARD_TARGET
, XTF_DONT_LOAD
);
639 load_extension(r
->h
, "standard");
640 return xtables_find_target(XT_STANDARD_TARGET
, XTF_LOAD_MUST_SUCCEED
);
643 t
= xtables_find_target(name
, XTF_DONT_LOAD
);
645 if (!t
&& load_extension(r
->h
, name
))
646 t
= xtables_find_target(name
, XTF_DONT_LOAD
);
651 static struct xtables_target
*
652 get_target(struct fw3_ipt_rule
*r
, const char *name
)
655 struct xtables_target
*t
;
656 struct xtables_globals
*g
;
658 t
= find_target(r
, name
);
663 s
= XT_ALIGN(sizeof(struct xt_entry_target
)) + t
->size
;
666 fw3_xt_set_target_name(t
, name
);
668 t
->t
->u
.user
.revision
= t
->revision
;
669 t
->t
->u
.target_size
= s
;
671 /* free previous userspace data */
672 fw3_xt_free_target_udata(t
);
677 /* merge option table */
678 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
679 fw3_xt_merge_target_options(g
, t
);
687 fw3_ipt_rule_proto(struct fw3_ipt_rule
*r
, struct fw3_protocol
*proto
)
691 if (!proto
|| proto
->any
)
694 pr
= proto
->protocol
;
697 if (r
->h
->family
== FW3_FAMILY_V6
)
702 r
->e6
.ipv6
.proto
= pr
;
703 r
->e6
.ipv6
.flags
|= IP6T_F_PROTO
;
706 r
->e6
.ipv6
.invflags
|= XT_INV_PROTO
;
714 r
->e
.ip
.invflags
|= XT_INV_PROTO
;
721 fw3_ipt_rule_in_out(struct fw3_ipt_rule
*r
,
722 struct fw3_device
*in
, struct fw3_device
*out
)
725 if (r
->h
->family
== FW3_FAMILY_V6
)
729 xtables_parse_interface(in
->name
, r
->e6
.ipv6
.iniface
,
730 r
->e6
.ipv6
.iniface_mask
);
733 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_IN
;
736 if (out
&& !out
->any
)
738 xtables_parse_interface(out
->name
, r
->e6
.ipv6
.outiface
,
739 r
->e6
.ipv6
.outiface_mask
);
742 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_OUT
;
750 xtables_parse_interface(in
->name
, r
->e
.ip
.iniface
,
751 r
->e
.ip
.iniface_mask
);
754 r
->e
.ip
.invflags
|= IPT_INV_VIA_IN
;
757 if (out
&& !out
->any
)
759 xtables_parse_interface(out
->name
, r
->e
.ip
.outiface
,
760 r
->e
.ip
.outiface_mask
);
763 r
->e
.ip
.invflags
|= IPT_INV_VIA_OUT
;
770 fw3_ipt_rule_src_dest(struct fw3_ipt_rule
*r
,
771 struct fw3_address
*src
, struct fw3_address
*dest
)
773 if ((src
&& src
->range
) || (dest
&& dest
->range
))
775 fw3_ipt_rule_addarg(r
, false, "-m", "iprange");
782 fw3_ipt_rule_addarg(r
, src
->invert
, "--src-range",
783 fw3_address_to_string(src
, false, false));
786 else if (r
->h
->family
== FW3_FAMILY_V6
)
788 r
->e6
.ipv6
.src
= src
->address
.v6
;
789 r
->e6
.ipv6
.smsk
= src
->mask
.v6
;
792 for (i
= 0; i
< 4; i
++)
793 r
->e6
.ipv6
.src
.s6_addr32
[i
] &= r
->e6
.ipv6
.smsk
.s6_addr32
[i
];
796 r
->e6
.ipv6
.invflags
|= IP6T_INV_SRCIP
;
801 r
->e
.ip
.src
= src
->address
.v4
;
802 r
->e
.ip
.smsk
= src
->mask
.v4
;
804 r
->e
.ip
.src
.s_addr
&= r
->e
.ip
.smsk
.s_addr
;
807 r
->e
.ip
.invflags
|= IPT_INV_SRCIP
;
811 if (dest
&& dest
->set
)
815 fw3_ipt_rule_addarg(r
, dest
->invert
, "--dst-range",
816 fw3_address_to_string(dest
, false, false));
819 else if (r
->h
->family
== FW3_FAMILY_V6
)
821 r
->e6
.ipv6
.dst
= dest
->address
.v6
;
822 r
->e6
.ipv6
.dmsk
= dest
->mask
.v6
;
825 for (i
= 0; i
< 4; i
++)
826 r
->e6
.ipv6
.dst
.s6_addr32
[i
] &= r
->e6
.ipv6
.dmsk
.s6_addr32
[i
];
829 r
->e6
.ipv6
.invflags
|= IP6T_INV_DSTIP
;
834 r
->e
.ip
.dst
= dest
->address
.v4
;
835 r
->e
.ip
.dmsk
= dest
->mask
.v4
;
837 r
->e
.ip
.dst
.s_addr
&= r
->e
.ip
.dmsk
.s_addr
;
840 r
->e
.ip
.invflags
|= IPT_INV_DSTIP
;
846 fw3_ipt_rule_sport_dport(struct fw3_ipt_rule
*r
,
847 struct fw3_port
*sp
, struct fw3_port
*dp
)
849 char buf
[sizeof("65535:65535\0")];
851 if ((!sp
|| !sp
->set
) && (!dp
|| !dp
->set
))
854 if (!get_protoname(r
))
859 if (sp
->port_min
== sp
->port_max
)
860 sprintf(buf
, "%u", sp
->port_min
);
862 sprintf(buf
, "%u:%u", sp
->port_min
, sp
->port_max
);
864 fw3_ipt_rule_addarg(r
, sp
->invert
, "--sport", buf
);
869 if (dp
->port_min
== dp
->port_max
)
870 sprintf(buf
, "%u", dp
->port_min
);
872 sprintf(buf
, "%u:%u", dp
->port_min
, dp
->port_max
);
874 fw3_ipt_rule_addarg(r
, dp
->invert
, "--dport", buf
);
879 fw3_ipt_rule_device(struct fw3_ipt_rule
*r
, const char *device
, bool out
)
882 struct fw3_device dev
= { .any
= false };
883 strncpy(dev
.name
, device
, sizeof(dev
.name
) - 1);
884 fw3_ipt_rule_in_out(r
, (out
) ? NULL
: &dev
, (out
) ? &dev
: NULL
);
889 fw3_ipt_rule_mac(struct fw3_ipt_rule
*r
, struct fw3_mac
*mac
)
891 char buf
[sizeof("ff:ff:ff:ff:ff:ff\0")];
892 uint8_t *addr
= mac
->mac
.ether_addr_octet
;
897 sprintf(buf
, "%02x:%02x:%02x:%02x:%02x:%02x",
898 addr
[0], addr
[1], addr
[2], addr
[3], addr
[4], addr
[5]);
900 fw3_ipt_rule_addarg(r
, false, "-m", "mac");
901 fw3_ipt_rule_addarg(r
, mac
->invert
, "--mac-source", buf
);
905 fw3_ipt_rule_icmptype(struct fw3_ipt_rule
*r
, struct fw3_icmptype
*icmp
)
907 char buf
[sizeof("255/255\0")];
913 if (r
->h
->family
== FW3_FAMILY_V6
)
915 if (icmp
->code6_min
== 0 && icmp
->code6_max
== 0xFF)
916 sprintf(buf
, "%u", icmp
->type6
);
918 sprintf(buf
, "%u/%u", icmp
->type6
, icmp
->code6_min
);
920 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmpv6-type", buf
);
925 if (icmp
->code_min
== 0 && icmp
->code_max
== 0xFF)
926 sprintf(buf
, "%u", icmp
->type
);
928 sprintf(buf
, "%u/%u", icmp
->type
, icmp
->code_min
);
930 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmp-type", buf
);
935 fw3_ipt_rule_limit(struct fw3_ipt_rule
*r
, struct fw3_limit
*limit
)
937 char buf
[sizeof("-4294967296/second\0")];
939 if (!limit
|| limit
->rate
<= 0)
942 fw3_ipt_rule_addarg(r
, false, "-m", "limit");
944 sprintf(buf
, "%u/%s", limit
->rate
, fw3_limit_units
[limit
->unit
]);
945 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit", buf
);
947 if (limit
->burst
> 0)
949 sprintf(buf
, "%u", limit
->burst
);
950 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit-burst", buf
);
955 fw3_ipt_rule_ipset(struct fw3_ipt_rule
*r
, struct fw3_setmatch
*match
)
957 char buf
[sizeof("dst,dst,dst\0")];
961 struct fw3_ipset
*set
;
962 struct fw3_ipset_datatype
*type
;
964 if (!match
|| !match
->set
|| !match
->ptr
)
968 list_for_each_entry(type
, &set
->datatypes
, list
)
976 p
+= sprintf(p
, "%s", match
->dir
[i
] ? match
->dir
[i
] : type
->dir
);
980 fw3_ipt_rule_addarg(r
, false, "-m", "set");
982 fw3_ipt_rule_addarg(r
, match
->invert
, "--match-set",
983 set
->external
? set
->external
: set
->name
);
985 fw3_ipt_rule_addarg(r
, false, buf
, NULL
);
989 fw3_ipt_rule_time(struct fw3_ipt_rule
*r
, struct fw3_time
*time
)
992 struct tm empty
= { 0 };
994 char buf
[84]; /* sizeof("1,2,3,...,30,31\0") */
997 bool d1
= memcmp(&time
->datestart
, &empty
, sizeof(empty
));
998 bool d2
= memcmp(&time
->datestop
, &empty
, sizeof(empty
));
1000 if (!d1
&& !d2
&& !time
->timestart
&& !time
->timestop
&&
1001 !(time
->monthdays
& 0xFFFFFFFE) && !(time
->weekdays
& 0xFE))
1006 fw3_ipt_rule_addarg(r
, false, "-m", "time");
1009 fw3_ipt_rule_addarg(r
, false, "--utc", NULL
);
1013 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestart
);
1014 fw3_ipt_rule_addarg(r
, false, "--datestart", buf
);
1019 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestop
);
1020 fw3_ipt_rule_addarg(r
, false, "--datestop", buf
);
1023 if (time
->timestart
)
1025 sprintf(buf
, "%02d:%02d:%02d",
1026 time
->timestart
/ 3600,
1027 time
->timestart
% 3600 / 60,
1028 time
->timestart
% 60);
1030 fw3_ipt_rule_addarg(r
, false, "--timestart", buf
);
1035 sprintf(buf
, "%02d:%02d:%02d",
1036 time
->timestop
/ 3600,
1037 time
->timestop
% 3600 / 60,
1038 time
->timestop
% 60);
1040 fw3_ipt_rule_addarg(r
, false, "--timestop", buf
);
1043 if (time
->monthdays
& 0xFFFFFFFE)
1045 for (i
= 1, p
= buf
; i
< 32; i
++)
1047 if (fw3_hasbit(time
->monthdays
, i
))
1052 p
+= sprintf(p
, "%u", i
);
1056 fw3_ipt_rule_addarg(r
, fw3_hasbit(time
->monthdays
, 0), "--monthdays", buf
);
1059 if (time
->weekdays
& 0xFE)
1061 for (i
= 1, p
= buf
; i
< 8; i
++)
1063 if (fw3_hasbit(time
->weekdays
, i
))
1068 p
+= sprintf(p
, "%u", i
);
1072 fw3_ipt_rule_addarg(r
, fw3_hasbit(time
->weekdays
, 0), "--weekdays", buf
);
1077 fw3_ipt_rule_mark(struct fw3_ipt_rule
*r
, struct fw3_mark
*mark
)
1079 char buf
[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
1081 if (!mark
|| !mark
->set
)
1084 if (mark
->mask
< 0xFFFFFFFF)
1085 sprintf(buf
, "0x%x/0x%x", mark
->mark
, mark
->mask
);
1087 sprintf(buf
, "0x%x", mark
->mark
);
1089 fw3_ipt_rule_addarg(r
, false, "-m", "mark");
1090 fw3_ipt_rule_addarg(r
, mark
->invert
, "--mark", buf
);
1094 fw3_ipt_rule_comment(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
1103 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
1106 fw3_ipt_rule_addarg(r
, false, "-m", "comment");
1107 fw3_ipt_rule_addarg(r
, false, "--comment", buf
);
1111 fw3_ipt_rule_extra(struct fw3_ipt_rule
*r
, const char *extra
)
1115 if (!extra
|| !*extra
)
1118 s
= fw3_strdup(extra
);
1120 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
1122 tmp
= realloc(r
->argv
, (r
->argc
+ 1) * sizeof(*r
->argv
));
1128 r
->argv
[r
->argc
++] = fw3_strdup(p
);
1134 #ifndef DISABLE_IPV6
1136 rule_print6(struct ip6t_entry
*e
)
1138 char buf1
[INET6_ADDRSTRLEN
], buf2
[INET6_ADDRSTRLEN
];
1141 if (e
->ipv6
.flags
& IP6T_F_PROTO
)
1143 if (e
->ipv6
.invflags
& XT_INV_PROTO
)
1146 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e6
));
1149 printf(" -p %s", pname
);
1151 printf(" -p %u", e
->ipv6
.proto
);
1154 if (e
->ipv6
.iniface
[0])
1156 if (e
->ipv6
.invflags
& IP6T_INV_VIA_IN
)
1159 printf(" -i %s", e
->ipv6
.iniface
);
1162 if (e
->ipv6
.outiface
[0])
1164 if (e
->ipv6
.invflags
& IP6T_INV_VIA_OUT
)
1167 printf(" -o %s", e
->ipv6
.outiface
);
1170 if (memcmp(&e
->ipv6
.src
, &in6addr_any
, sizeof(struct in6_addr
)))
1172 if (e
->ipv6
.invflags
& IP6T_INV_SRCIP
)
1176 inet_ntop(AF_INET6
, &e
->ipv6
.src
, buf1
, sizeof(buf1
)),
1177 inet_ntop(AF_INET6
, &e
->ipv6
.smsk
, buf2
, sizeof(buf2
)));
1180 if (memcmp(&e
->ipv6
.dst
, &in6addr_any
, sizeof(struct in6_addr
)))
1182 if (e
->ipv6
.invflags
& IP6T_INV_DSTIP
)
1186 inet_ntop(AF_INET6
, &e
->ipv6
.dst
, buf1
, sizeof(buf1
)),
1187 inet_ntop(AF_INET6
, &e
->ipv6
.dmsk
, buf2
, sizeof(buf2
)));
1193 rule_print4(struct ipt_entry
*e
)
1195 struct in_addr in_zero
= { 0 };
1196 char buf1
[sizeof("255.255.255.255\0")], buf2
[sizeof("255.255.255.255\0")];
1201 if (e
->ip
.invflags
& XT_INV_PROTO
)
1204 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e
));
1207 printf(" -p %s", pname
);
1209 printf(" -p %u", e
->ip
.proto
);
1212 if (e
->ip
.iniface
[0])
1214 if (e
->ip
.invflags
& IPT_INV_VIA_IN
)
1217 printf(" -i %s", e
->ip
.iniface
);
1220 if (e
->ip
.outiface
[0])
1222 if (e
->ip
.invflags
& IPT_INV_VIA_OUT
)
1225 printf(" -o %s", e
->ip
.outiface
);
1228 if (memcmp(&e
->ip
.src
, &in_zero
, sizeof(struct in_addr
)))
1230 if (e
->ip
.invflags
& IPT_INV_SRCIP
)
1234 inet_ntop(AF_INET
, &e
->ip
.src
, buf1
, sizeof(buf1
)),
1235 inet_ntop(AF_INET
, &e
->ip
.smsk
, buf2
, sizeof(buf2
)));
1238 if (memcmp(&e
->ip
.dst
, &in_zero
, sizeof(struct in_addr
)))
1240 if (e
->ip
.invflags
& IPT_INV_DSTIP
)
1244 inet_ntop(AF_INET
, &e
->ip
.dst
, buf1
, sizeof(buf1
)),
1245 inet_ntop(AF_INET
, &e
->ip
.dmsk
, buf2
, sizeof(buf2
)));
1250 rule_print(struct fw3_ipt_rule
*r
, const char *prefix
, const char *chain
)
1252 debug(r
->h
, "%s %s", prefix
, chain
);
1254 #ifndef DISABLE_IPV6
1255 if (r
->h
->family
== FW3_FAMILY_V6
)
1256 rule_print6(&r
->e6
);
1261 fw3_xt_print_matches(&r
->e
.ip
, r
->matches
);
1262 fw3_xt_print_target(&r
->e
.ip
, r
->target
);
1268 parse_option(struct fw3_ipt_rule
*r
, int optc
, bool inv
)
1270 struct xtables_rule_match
*m
;
1271 struct xtables_match
*em
;
1273 /* is a target option */
1274 if (r
->target
&& fw3_xt_has_target_parse(r
->target
) &&
1275 optc
>= r
->target
->option_offset
&&
1276 optc
< (r
->target
->option_offset
+ 256))
1278 xtables_option_tpcall(optc
, r
->argv
, inv
, r
->target
, &r
->e
);
1282 /* try to dispatch argument to one of the match parsers */
1283 for (m
= r
->matches
; m
; m
= m
->next
)
1287 if (m
->completed
|| !fw3_xt_has_match_parse(em
))
1290 if (optc
< em
->option_offset
||
1291 optc
>= (em
->option_offset
+ 256))
1294 xtables_option_mpcall(optc
, r
->argv
, inv
, em
, &r
->e
);
1298 /* unhandled option, might belong to a protocol match */
1299 if ((em
= load_protomatch(r
)) != NULL
)
1301 init_match(r
, em
, false);
1303 r
->protocol_loaded
= true;
1310 warn("parse_option(): option '%s' needs argument", r
->argv
[optind
-1]);
1313 warn("parse_option(): unknown option '%s'", r
->argv
[optind
-1]);
1319 fw3_ipt_rule_addarg(struct fw3_ipt_rule
*r
, bool inv
,
1320 const char *k
, const char *v
)
1328 n
= inv
+ !!k
+ !!v
;
1329 tmp
= realloc(r
->argv
, (r
->argc
+ n
) * sizeof(*tmp
));
1337 r
->argv
[r
->argc
++] = fw3_strdup("!");
1339 r
->argv
[r
->argc
++] = fw3_strdup(k
);
1342 r
->argv
[r
->argc
++] = fw3_strdup(v
);
1345 static unsigned char *
1346 rule_mask(struct fw3_ipt_rule
*r
)
1349 unsigned char *p
, *mask
= NULL
;
1350 struct xtables_rule_match
*m
;
1352 #define SZ(x) XT_ALIGN(sizeof(struct x))
1354 #ifndef DISABLE_IPV6
1355 if (r
->h
->family
== FW3_FAMILY_V6
)
1359 for (m
= r
->matches
; m
; m
= m
->next
)
1360 s
+= SZ(ip6t_entry_match
) + m
->match
->size
;
1362 s
+= SZ(ip6t_entry_target
);
1364 s
+= r
->target
->size
;
1366 mask
= fw3_alloc(s
);
1367 memset(mask
, 0xFF, SZ(ip6t_entry
));
1368 p
= mask
+ SZ(ip6t_entry
);
1370 for (m
= r
->matches
; m
; m
= m
->next
)
1372 memset(p
, 0xFF, SZ(ip6t_entry_match
) + m
->match
->userspacesize
);
1373 p
+= SZ(ip6t_entry_match
) + m
->match
->size
;
1376 memset(p
, 0xFF, SZ(ip6t_entry_target
) + (r
->target
) ? r
->target
->userspacesize
: 0);
1383 for (m
= r
->matches
; m
; m
= m
->next
)
1384 s
+= SZ(ipt_entry_match
) + m
->match
->size
;
1386 s
+= SZ(ipt_entry_target
);
1388 s
+= r
->target
->size
;
1390 mask
= fw3_alloc(s
);
1391 memset(mask
, 0xFF, SZ(ipt_entry
));
1392 p
= mask
+ SZ(ipt_entry
);
1394 for (m
= r
->matches
; m
; m
= m
->next
)
1396 memset(p
, 0xFF, SZ(ipt_entry_match
) + m
->match
->userspacesize
);
1397 p
+= SZ(ipt_entry_match
) + m
->match
->size
;
1400 memset(p
, 0xFF, SZ(ipt_entry_target
) + (r
->target
) ? r
->target
->userspacesize
: 0);
1407 rule_build(struct fw3_ipt_rule
*r
)
1409 size_t s
, target_size
= (r
->target
) ? r
->target
->t
->u
.target_size
: 0;
1410 struct xtables_rule_match
*m
;
1412 #ifndef DISABLE_IPV6
1413 if (r
->h
->family
== FW3_FAMILY_V6
)
1415 struct ip6t_entry
*e6
;
1417 s
= XT_ALIGN(sizeof(struct ip6t_entry
));
1419 for (m
= r
->matches
; m
; m
= m
->next
)
1420 s
+= m
->match
->m
->u
.match_size
;
1422 e6
= fw3_alloc(s
+ target_size
);
1424 memcpy(e6
, &r
->e6
, sizeof(struct ip6t_entry
));
1426 e6
->target_offset
= s
;
1427 e6
->next_offset
= s
+ target_size
;
1431 for (m
= r
->matches
; m
; m
= m
->next
)
1433 memcpy(e6
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1434 s
+= m
->match
->m
->u
.match_size
;
1438 memcpy(e6
->elems
+ s
, r
->target
->t
, target_size
);
1445 struct ipt_entry
*e
;
1447 s
= XT_ALIGN(sizeof(struct ipt_entry
));
1449 for (m
= r
->matches
; m
; m
= m
->next
)
1450 s
+= m
->match
->m
->u
.match_size
;
1452 e
= fw3_alloc(s
+ target_size
);
1454 memcpy(e
, &r
->e
, sizeof(struct ipt_entry
));
1456 e
->target_offset
= s
;
1457 e
->next_offset
= s
+ target_size
;
1461 for (m
= r
->matches
; m
; m
= m
->next
)
1463 memcpy(e
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1464 s
+= m
->match
->m
->u
.match_size
;
1468 memcpy(e
->elems
+ s
, r
->target
->t
, target_size
);
1475 __fw3_ipt_rule_append(struct fw3_ipt_rule
*r
, bool repl
, const char *fmt
, ...)
1478 unsigned char *mask
;
1480 struct xtables_rule_match
*m
;
1481 struct xtables_match
*em
;
1482 struct xtables_target
*et
;
1483 struct xtables_globals
*g
;
1492 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
1495 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
1496 g
->opts
= g
->orig_opts
;
1503 em
= find_match(r
, "id");
1507 warn("fw3_ipt_rule_append(): Can't find match '%s'", "id");
1511 init_match(r
, em
, true);
1513 id
= FW3_ID_MAGIC
| (r
->id
& ~FW3_ID_MASK
);
1514 memcpy(em
->m
->data
, &id
, sizeof(id
));
1519 while ((optc
= getopt_long(r
->argc
, r
->argv
, "-:m:j:", g
->opts
,
1525 em
= find_match(r
, optarg
);
1529 warn("fw3_ipt_rule_append(): Can't find match '%s'", optarg
);
1533 init_match(r
, em
, true);
1537 et
= get_target(r
, optarg
);
1541 warn("fw3_ipt_rule_append(): Can't find target '%s'", optarg
);
1548 if ((optarg
[0] == '!') && (optarg
[1] == '\0'))
1555 warn("fw3_ipt_rule_append(): Bad argument '%s'", optarg
);
1559 if (parse_option(r
, optc
, inv
))
1567 for (m
= r
->matches
; m
; m
= m
->next
)
1568 xtables_option_mfcall(m
->match
);
1571 xtables_option_tfcall(r
->target
);
1573 rule
= rule_build(r
);
1575 #ifndef DISABLE_IPV6
1576 if (r
->h
->family
== FW3_FAMILY_V6
)
1580 mask
= rule_mask(r
);
1582 while (ip6tc_delete_entry(buf
, rule
, mask
, r
->h
->handle
))
1584 rule_print(r
, "-D", buf
);
1590 rule_print(r
, "-A", buf
);
1592 if (!ip6tc_append_entry(buf
, rule
, r
->h
->handle
))
1593 warn("ip6tc_append_entry(): %s", ip6tc_strerror(errno
));
1600 mask
= rule_mask(r
);
1602 while (iptc_delete_entry(buf
, rule
, mask
, r
->h
->handle
))
1604 rule_print(r
, "-D", buf
);
1610 rule_print(r
, "-A", buf
);
1612 if (!iptc_append_entry(buf
, rule
, r
->h
->handle
))
1613 warn("iptc_append_entry(): %s\n", iptc_strerror(errno
));
1619 for (i
= 1; i
< r
->argc
; i
++)
1624 xtables_rule_matches_free(&r
->matches
);
1631 /* reset all targets and matches */
1632 for (em
= xtables_matches
; em
; em
= em
->next
)
1635 for (et
= xtables_targets
; et
; et
= et
->next
)
1641 xtables_free_opts(1);
1644 struct fw3_ipt_rule
*
1645 fw3_ipt_rule_create(struct fw3_ipt_handle
*handle
, struct fw3_protocol
*proto
,
1646 struct fw3_device
*in
, struct fw3_device
*out
,
1647 struct fw3_address
*src
, struct fw3_address
*dest
)
1649 struct fw3_ipt_rule
*r
;
1651 r
= fw3_ipt_rule_new(handle
);
1653 fw3_ipt_rule_proto(r
, proto
);
1654 fw3_ipt_rule_in_out(r
, in
, out
);
1655 fw3_ipt_rule_src_dest(r
, src
, dest
);
1661 xtables_register_match(struct xtables_match
*me
)
1664 static struct xtables_match
**tmp
;
1666 if (!xext
.register_match
)
1667 xext
.register_match
= dlsym(RTLD_NEXT
, "xtables_register_match");
1669 if (!xext
.register_match
)
1672 xext
.register_match(me
);
1676 for (i
= 0; i
< xext
.mcount
; i
++)
1677 if (xext
.matches
[i
] == me
)
1680 tmp
= realloc(xext
.matches
, sizeof(me
) * (xext
.mcount
+ 1));
1686 xext
.matches
[xext
.mcount
++] = me
;
1691 xtables_register_target(struct xtables_target
*me
)
1694 static struct xtables_target
**tmp
;
1696 if (!xext
.register_target
)
1697 xext
.register_target
= dlsym(RTLD_NEXT
, "xtables_register_target");
1699 if (!xext
.register_target
)
1702 xext
.register_target(me
);
1706 for (i
= 0; i
< xext
.tcount
; i
++)
1707 if (xext
.targets
[i
] == me
)
1710 tmp
= realloc(xext
.targets
, sizeof(me
) * (xext
.tcount
+ 1));
1716 xext
.targets
[xext
.tcount
++] = me
;