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 has_rule_tag(const void *base
, unsigned int start
, unsigned int end
)
265 const struct xt_entry_match
*em
;
267 for (i
= start
; i
< end
; i
+= em
->u
.match_size
)
271 if (strcmp(em
->u
.user
.name
, "comment"))
274 if (!memcmp(em
->data
, "!fw3", 4))
282 fw3_ipt_delete_id_rules(struct fw3_ipt_handle
*h
, const char *chain
)
285 const struct ipt_entry
*e
;
289 if (h
->family
== FW3_FAMILY_V6
)
291 if (!ip6tc_is_chain(chain
, h
->handle
))
297 const struct ip6t_entry
*e6
;
298 for (num
= 0, e6
= ip6tc_first_rule(chain
, h
->handle
);
300 num
++, e6
= ip6tc_next_rule(e6
, h
->handle
))
302 if (has_rule_tag(e6
, sizeof(*e6
), e6
->target_offset
))
305 debug(h
, "-D %s %u\n", chain
, num
+ 1);
307 ip6tc_delete_num_entry(chain
, num
, h
->handle
);
317 if (!iptc_is_chain(chain
, h
->handle
))
323 for (num
= 0, e
= iptc_first_rule(chain
, h
->handle
);
325 num
++, e
= iptc_next_rule(e
, h
->handle
))
327 if (has_rule_tag(e
, sizeof(*e
), e
->target_offset
))
330 debug(h
, "-D %s %u\n", chain
, num
+ 1);
332 iptc_delete_num_entry(chain
, num
, h
->handle
);
342 fw3_ipt_create_chain(struct fw3_ipt_handle
*h
, const char *fmt
, ...)
348 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
352 debug(h
, "-N %s\n", buf
);
354 iptc_create_chain(buf
, h
->handle
);
358 fw3_ipt_flush(struct fw3_ipt_handle
*h
)
363 if (h
->family
== FW3_FAMILY_V6
)
365 for (chain
= ip6tc_first_chain(h
->handle
);
367 chain
= ip6tc_next_chain(h
->handle
))
369 ip6tc_flush_entries(chain
, h
->handle
);
372 for (chain
= ip6tc_first_chain(h
->handle
);
374 chain
= ip6tc_next_chain(h
->handle
))
376 ip6tc_delete_chain(chain
, h
->handle
);
382 for (chain
= iptc_first_chain(h
->handle
);
384 chain
= iptc_next_chain(h
->handle
))
386 iptc_flush_entries(chain
, h
->handle
);
389 for (chain
= iptc_first_chain(h
->handle
);
391 chain
= iptc_next_chain(h
->handle
))
393 iptc_delete_chain(chain
, h
->handle
);
399 chain_is_empty(struct fw3_ipt_handle
*h
, const char *chain
)
402 if (h
->family
== FW3_FAMILY_V6
)
403 return (!ip6tc_builtin(chain
, h
->handle
) &&
404 !ip6tc_first_rule(chain
, h
->handle
));
407 return (!iptc_builtin(chain
, h
->handle
) &&
408 !iptc_first_rule(chain
, h
->handle
));
412 fw3_ipt_gc(struct fw3_ipt_handle
*h
)
418 if (h
->family
== FW3_FAMILY_V6
)
423 for (chain
= ip6tc_first_chain(h
->handle
);
425 chain
= ip6tc_next_chain(h
->handle
))
427 if (!chain_is_empty(h
, chain
))
430 fw3_ipt_delete_chain(h
, chain
);
442 for (chain
= iptc_first_chain(h
->handle
);
444 chain
= iptc_next_chain(h
->handle
))
446 warn("C=%s\n", chain
);
448 if (!chain_is_empty(h
, chain
))
451 warn("D=%s\n", chain
);
453 fw3_ipt_delete_chain(h
, chain
);
462 fw3_ipt_commit(struct fw3_ipt_handle
*h
)
467 if (h
->family
== FW3_FAMILY_V6
)
469 rv
= ip6tc_commit(h
->handle
);
471 warn("ip6tc_commit(): %s", ip6tc_strerror(errno
));
476 rv
= iptc_commit(h
->handle
);
478 warn("iptc_commit(): %s", iptc_strerror(errno
));
483 fw3_ipt_close(struct fw3_ipt_handle
*h
)
488 struct fw3_ipt_rule
*
489 fw3_ipt_rule_new(struct fw3_ipt_handle
*h
)
491 struct fw3_ipt_rule
*r
;
493 r
= fw3_alloc(sizeof(*r
));
496 r
->argv
= fw3_alloc(sizeof(char *));
497 r
->argv
[r
->argc
++] = "fw3";
504 is_chain(struct fw3_ipt_handle
*h
, const char *name
)
507 if (h
->family
== FW3_FAMILY_V6
)
508 return ip6tc_is_chain(name
, h
->handle
);
511 return iptc_is_chain(name
, h
->handle
);
515 get_protoname(struct fw3_ipt_rule
*r
)
517 const struct xtables_pprot
*pp
;
520 for (pp
= xtables_chain_protos
; pp
->name
; pp
++)
521 if (pp
->num
== r
->protocol
)
522 return (char *)pp
->name
;
527 static struct xtables_match
*
528 find_match(struct fw3_ipt_rule
*r
, const char *name
)
530 struct xtables_match
*m
;
533 m
= xtables_find_match(name
, XTF_TRY_LOAD
, &r
->matches
);
540 init_match(struct fw3_ipt_rule
*r
, struct xtables_match
*m
, bool no_clone
)
543 struct xtables_globals
*g
;
548 s
= XT_ALIGN(sizeof(struct xt_entry_match
)) + m
->size
;
552 fw3_xt_set_match_name(m
);
554 m
->m
->u
.user
.revision
= m
->revision
;
555 m
->m
->u
.match_size
= s
;
557 /* free previous userspace data */
558 fw3_xt_free_match_udata(m
);
563 /* don't merge options if no_clone is set and this match is a clone */
564 if (no_clone
&& (m
== m
->next
))
567 /* merge option table */
568 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
569 fw3_xt_merge_match_options(g
, m
);
573 need_protomatch(struct fw3_ipt_rule
*r
, const char *pname
)
578 if (!xtables_find_match(pname
, XTF_DONT_LOAD
, NULL
))
581 return !r
->protocol_loaded
;
584 static struct xtables_match
*
585 load_protomatch(struct fw3_ipt_rule
*r
)
587 const char *pname
= get_protoname(r
);
589 if (!need_protomatch(r
, pname
))
592 return find_match(r
, pname
);
595 static struct xtables_target
*
596 find_target(struct fw3_ipt_rule
*r
, const char *name
)
598 struct xtables_target
*t
;
602 if (is_chain(r
->h
, name
))
603 t
= xtables_find_target(XT_STANDARD_TARGET
, XTF_TRY_LOAD
);
605 t
= xtables_find_target(name
, XTF_TRY_LOAD
);
612 static struct xtables_target
*
613 get_target(struct fw3_ipt_rule
*r
, const char *name
)
616 struct xtables_target
*t
;
617 struct xtables_globals
*g
;
619 t
= find_target(r
, name
);
624 s
= XT_ALIGN(sizeof(struct xt_entry_target
)) + t
->size
;
627 fw3_xt_set_target_name(t
, name
);
629 t
->t
->u
.user
.revision
= t
->revision
;
630 t
->t
->u
.target_size
= s
;
632 /* free previous userspace data */
633 fw3_xt_free_target_udata(t
);
638 /* merge option table */
639 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
640 fw3_xt_merge_target_options(g
, t
);
648 fw3_ipt_rule_proto(struct fw3_ipt_rule
*r
, struct fw3_protocol
*proto
)
652 if (!proto
|| proto
->any
)
655 pr
= proto
->protocol
;
658 if (r
->h
->family
== FW3_FAMILY_V6
)
663 r
->e6
.ipv6
.proto
= pr
;
664 r
->e6
.ipv6
.flags
|= IP6T_F_PROTO
;
667 r
->e6
.ipv6
.invflags
|= XT_INV_PROTO
;
675 r
->e
.ip
.invflags
|= XT_INV_PROTO
;
682 fw3_ipt_rule_in_out(struct fw3_ipt_rule
*r
,
683 struct fw3_device
*in
, struct fw3_device
*out
)
686 if (r
->h
->family
== FW3_FAMILY_V6
)
690 xtables_parse_interface(in
->name
, r
->e6
.ipv6
.iniface
,
691 r
->e6
.ipv6
.iniface_mask
);
694 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_IN
;
697 if (out
&& !out
->any
)
699 xtables_parse_interface(out
->name
, r
->e6
.ipv6
.outiface
,
700 r
->e6
.ipv6
.outiface_mask
);
703 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_OUT
;
711 xtables_parse_interface(in
->name
, r
->e
.ip
.iniface
,
712 r
->e
.ip
.iniface_mask
);
715 r
->e
.ip
.invflags
|= IPT_INV_VIA_IN
;
718 if (out
&& !out
->any
)
720 xtables_parse_interface(out
->name
, r
->e
.ip
.outiface
,
721 r
->e
.ip
.outiface_mask
);
724 r
->e
.ip
.invflags
|= IPT_INV_VIA_OUT
;
731 fw3_ipt_rule_src_dest(struct fw3_ipt_rule
*r
,
732 struct fw3_address
*src
, struct fw3_address
*dest
)
734 if ((src
&& src
->range
) || (dest
&& dest
->range
))
736 fw3_ipt_rule_addarg(r
, false, "-m", "iprange");
743 fw3_ipt_rule_addarg(r
, src
->invert
, "--src-range",
744 fw3_address_to_string(src
, false, false));
747 else if (r
->h
->family
== FW3_FAMILY_V6
)
749 r
->e6
.ipv6
.src
= src
->address
.v6
;
750 r
->e6
.ipv6
.smsk
= src
->mask
.v6
;
753 for (i
= 0; i
< 4; i
++)
754 r
->e6
.ipv6
.src
.s6_addr32
[i
] &= r
->e6
.ipv6
.smsk
.s6_addr32
[i
];
757 r
->e6
.ipv6
.invflags
|= IP6T_INV_SRCIP
;
762 r
->e
.ip
.src
= src
->address
.v4
;
763 r
->e
.ip
.smsk
= src
->mask
.v4
;
765 r
->e
.ip
.src
.s_addr
&= r
->e
.ip
.smsk
.s_addr
;
768 r
->e
.ip
.invflags
|= IPT_INV_SRCIP
;
772 if (dest
&& dest
->set
)
776 fw3_ipt_rule_addarg(r
, dest
->invert
, "--dst-range",
777 fw3_address_to_string(dest
, false, false));
780 else if (r
->h
->family
== FW3_FAMILY_V6
)
782 r
->e6
.ipv6
.dst
= dest
->address
.v6
;
783 r
->e6
.ipv6
.dmsk
= dest
->mask
.v6
;
786 for (i
= 0; i
< 4; i
++)
787 r
->e6
.ipv6
.dst
.s6_addr32
[i
] &= r
->e6
.ipv6
.dmsk
.s6_addr32
[i
];
790 r
->e6
.ipv6
.invflags
|= IP6T_INV_DSTIP
;
795 r
->e
.ip
.dst
= dest
->address
.v4
;
796 r
->e
.ip
.dmsk
= dest
->mask
.v4
;
798 r
->e
.ip
.dst
.s_addr
&= r
->e
.ip
.dmsk
.s_addr
;
801 r
->e
.ip
.invflags
|= IPT_INV_DSTIP
;
807 fw3_ipt_rule_sport_dport(struct fw3_ipt_rule
*r
,
808 struct fw3_port
*sp
, struct fw3_port
*dp
)
810 char buf
[sizeof("65535:65535\0")];
812 if ((!sp
|| !sp
->set
) && (!dp
|| !dp
->set
))
815 if (!get_protoname(r
))
820 if (sp
->port_min
== sp
->port_max
)
821 sprintf(buf
, "%u", sp
->port_min
);
823 sprintf(buf
, "%u:%u", sp
->port_min
, sp
->port_max
);
825 fw3_ipt_rule_addarg(r
, sp
->invert
, "--sport", buf
);
830 if (dp
->port_min
== dp
->port_max
)
831 sprintf(buf
, "%u", dp
->port_min
);
833 sprintf(buf
, "%u:%u", dp
->port_min
, dp
->port_max
);
835 fw3_ipt_rule_addarg(r
, dp
->invert
, "--dport", buf
);
840 fw3_ipt_rule_device(struct fw3_ipt_rule
*r
, const char *device
, bool out
)
843 struct fw3_device dev
= { .any
= false };
844 strncpy(dev
.name
, device
, sizeof(dev
.name
) - 1);
845 fw3_ipt_rule_in_out(r
, (out
) ? NULL
: &dev
, (out
) ? &dev
: NULL
);
850 fw3_ipt_rule_mac(struct fw3_ipt_rule
*r
, struct fw3_mac
*mac
)
852 char buf
[sizeof("ff:ff:ff:ff:ff:ff\0")];
853 uint8_t *addr
= mac
->mac
.ether_addr_octet
;
858 sprintf(buf
, "%02x:%02x:%02x:%02x:%02x:%02x",
859 addr
[0], addr
[1], addr
[2], addr
[3], addr
[4], addr
[5]);
861 fw3_ipt_rule_addarg(r
, false, "-m", "mac");
862 fw3_ipt_rule_addarg(r
, mac
->invert
, "--mac-source", buf
);
866 fw3_ipt_rule_icmptype(struct fw3_ipt_rule
*r
, struct fw3_icmptype
*icmp
)
868 char buf
[sizeof("255/255\0")];
874 if (r
->h
->family
== FW3_FAMILY_V6
)
876 if (icmp
->code6_min
== 0 && icmp
->code6_max
== 0xFF)
877 sprintf(buf
, "%u", icmp
->type6
);
879 sprintf(buf
, "%u/%u", icmp
->type6
, icmp
->code6_min
);
881 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmpv6-type", buf
);
886 if (icmp
->code_min
== 0 && icmp
->code_max
== 0xFF)
887 sprintf(buf
, "%u", icmp
->type
);
889 sprintf(buf
, "%u/%u", icmp
->type
, icmp
->code_min
);
891 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmp-type", buf
);
896 fw3_ipt_rule_limit(struct fw3_ipt_rule
*r
, struct fw3_limit
*limit
)
898 char buf
[sizeof("-4294967296/second\0")];
900 if (!limit
|| limit
->rate
<= 0)
903 fw3_ipt_rule_addarg(r
, false, "-m", "limit");
905 sprintf(buf
, "%u/%s", limit
->rate
, fw3_limit_units
[limit
->unit
]);
906 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit", buf
);
908 if (limit
->burst
> 0)
910 sprintf(buf
, "%u", limit
->burst
);
911 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit-burst", buf
);
916 fw3_ipt_rule_ipset(struct fw3_ipt_rule
*r
, struct fw3_setmatch
*match
)
918 char buf
[sizeof("dst,dst,dst\0")];
922 struct fw3_ipset
*set
;
923 struct fw3_ipset_datatype
*type
;
925 if (!match
|| !match
->set
|| !match
->ptr
)
929 list_for_each_entry(type
, &set
->datatypes
, list
)
937 p
+= sprintf(p
, "%s", match
->dir
[i
] ? match
->dir
[i
] : type
->dir
);
941 fw3_ipt_rule_addarg(r
, false, "-m", "set");
943 fw3_ipt_rule_addarg(r
, match
->invert
, "--match-set",
944 set
->external
? set
->external
: set
->name
);
946 fw3_ipt_rule_addarg(r
, false, buf
, NULL
);
950 fw3_ipt_rule_time(struct fw3_ipt_rule
*r
, struct fw3_time
*time
)
953 struct tm empty
= { 0 };
955 char buf
[84]; /* sizeof("1,2,3,...,30,31\0") */
958 bool d1
= memcmp(&time
->datestart
, &empty
, sizeof(empty
));
959 bool d2
= memcmp(&time
->datestop
, &empty
, sizeof(empty
));
961 if (!d1
&& !d2
&& !time
->timestart
&& !time
->timestop
&&
962 !(time
->monthdays
& 0xFFFFFFFE) && !(time
->weekdays
& 0xFE))
967 fw3_ipt_rule_addarg(r
, false, "-m", "time");
970 fw3_ipt_rule_addarg(r
, false, "--utc", NULL
);
974 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestart
);
975 fw3_ipt_rule_addarg(r
, false, "--datestart", buf
);
980 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestop
);
981 fw3_ipt_rule_addarg(r
, false, "--datestop", buf
);
986 sprintf(buf
, "%02d:%02d:%02d",
987 time
->timestart
/ 3600,
988 time
->timestart
% 3600 / 60,
989 time
->timestart
% 60);
991 fw3_ipt_rule_addarg(r
, false, "--timestart", buf
);
996 sprintf(buf
, "%02d:%02d:%02d",
997 time
->timestop
/ 3600,
998 time
->timestop
% 3600 / 60,
999 time
->timestop
% 60);
1001 fw3_ipt_rule_addarg(r
, false, "--timestop", buf
);
1004 if (time
->monthdays
& 0xFFFFFFFE)
1006 for (i
= 1, p
= buf
; i
< 32; i
++)
1008 if (fw3_hasbit(time
->monthdays
, i
))
1013 p
+= sprintf(p
, "%u", i
);
1017 fw3_ipt_rule_addarg(r
, fw3_hasbit(time
->monthdays
, 0), "--monthdays", buf
);
1020 if (time
->weekdays
& 0xFE)
1022 for (i
= 1, p
= buf
; i
< 8; i
++)
1024 if (fw3_hasbit(time
->weekdays
, i
))
1029 p
+= sprintf(p
, "%u", i
);
1033 fw3_ipt_rule_addarg(r
, fw3_hasbit(time
->weekdays
, 0), "--weekdays", buf
);
1038 fw3_ipt_rule_mark(struct fw3_ipt_rule
*r
, struct fw3_mark
*mark
)
1040 char buf
[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
1042 if (!mark
|| !mark
->set
)
1045 if (mark
->mask
< 0xFFFFFFFF)
1046 sprintf(buf
, "0x%x/0x%x", mark
->mark
, mark
->mask
);
1048 sprintf(buf
, "0x%x", mark
->mark
);
1050 fw3_ipt_rule_addarg(r
, false, "-m", "mark");
1051 fw3_ipt_rule_addarg(r
, mark
->invert
, "--mark", buf
);
1055 fw3_ipt_rule_comment(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
1064 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
1067 fw3_ipt_rule_addarg(r
, false, "-m", "comment");
1068 fw3_ipt_rule_addarg(r
, false, "--comment", buf
);
1072 fw3_ipt_rule_extra(struct fw3_ipt_rule
*r
, const char *extra
)
1076 if (!extra
|| !*extra
)
1079 s
= fw3_strdup(extra
);
1081 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
1083 tmp
= realloc(r
->argv
, (r
->argc
+ 1) * sizeof(*r
->argv
));
1089 r
->argv
[r
->argc
++] = fw3_strdup(p
);
1095 #ifndef DISABLE_IPV6
1097 rule_print6(struct ip6t_entry
*e
)
1099 char buf1
[INET6_ADDRSTRLEN
], buf2
[INET6_ADDRSTRLEN
];
1102 if (e
->ipv6
.flags
& IP6T_F_PROTO
)
1104 if (e
->ipv6
.invflags
& XT_INV_PROTO
)
1107 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e6
));
1110 printf(" -p %s", pname
);
1112 printf(" -p %u", e
->ipv6
.proto
);
1115 if (e
->ipv6
.iniface
[0])
1117 if (e
->ipv6
.invflags
& IP6T_INV_VIA_IN
)
1120 printf(" -i %s", e
->ipv6
.iniface
);
1123 if (e
->ipv6
.outiface
[0])
1125 if (e
->ipv6
.invflags
& IP6T_INV_VIA_OUT
)
1128 printf(" -o %s", e
->ipv6
.outiface
);
1131 if (memcmp(&e
->ipv6
.src
, &in6addr_any
, sizeof(struct in6_addr
)))
1133 if (e
->ipv6
.invflags
& IP6T_INV_SRCIP
)
1137 inet_ntop(AF_INET6
, &e
->ipv6
.src
, buf1
, sizeof(buf1
)),
1138 inet_ntop(AF_INET6
, &e
->ipv6
.smsk
, buf2
, sizeof(buf2
)));
1141 if (memcmp(&e
->ipv6
.dst
, &in6addr_any
, sizeof(struct in6_addr
)))
1143 if (e
->ipv6
.invflags
& IP6T_INV_DSTIP
)
1147 inet_ntop(AF_INET6
, &e
->ipv6
.dst
, buf1
, sizeof(buf1
)),
1148 inet_ntop(AF_INET6
, &e
->ipv6
.dmsk
, buf2
, sizeof(buf2
)));
1154 rule_print4(struct ipt_entry
*e
)
1156 struct in_addr in_zero
= { 0 };
1157 char buf1
[sizeof("255.255.255.255\0")], buf2
[sizeof("255.255.255.255\0")];
1162 if (e
->ip
.invflags
& XT_INV_PROTO
)
1165 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e
));
1168 printf(" -p %s", pname
);
1170 printf(" -p %u", e
->ip
.proto
);
1173 if (e
->ip
.iniface
[0])
1175 if (e
->ip
.invflags
& IPT_INV_VIA_IN
)
1178 printf(" -i %s", e
->ip
.iniface
);
1181 if (e
->ip
.outiface
[0])
1183 if (e
->ip
.invflags
& IPT_INV_VIA_OUT
)
1186 printf(" -o %s", e
->ip
.outiface
);
1189 if (memcmp(&e
->ip
.src
, &in_zero
, sizeof(struct in_addr
)))
1191 if (e
->ip
.invflags
& IPT_INV_SRCIP
)
1195 inet_ntop(AF_INET
, &e
->ip
.src
, buf1
, sizeof(buf1
)),
1196 inet_ntop(AF_INET
, &e
->ip
.smsk
, buf2
, sizeof(buf2
)));
1199 if (memcmp(&e
->ip
.dst
, &in_zero
, sizeof(struct in_addr
)))
1201 if (e
->ip
.invflags
& IPT_INV_DSTIP
)
1205 inet_ntop(AF_INET
, &e
->ip
.dst
, buf1
, sizeof(buf1
)),
1206 inet_ntop(AF_INET
, &e
->ip
.dmsk
, buf2
, sizeof(buf2
)));
1211 rule_print(struct fw3_ipt_rule
*r
, const char *prefix
, const char *chain
)
1213 debug(r
->h
, "%s %s", prefix
, chain
);
1215 #ifndef DISABLE_IPV6
1216 if (r
->h
->family
== FW3_FAMILY_V6
)
1217 rule_print6(&r
->e6
);
1222 fw3_xt_print_matches(&r
->e
.ip
, r
->matches
);
1223 fw3_xt_print_target(&r
->e
.ip
, r
->target
);
1229 parse_option(struct fw3_ipt_rule
*r
, int optc
, bool inv
)
1231 struct xtables_rule_match
*m
;
1232 struct xtables_match
*em
;
1234 /* is a target option */
1235 if (r
->target
&& fw3_xt_has_target_parse(r
->target
) &&
1236 optc
>= r
->target
->option_offset
&&
1237 optc
< (r
->target
->option_offset
+ 256))
1239 xtables_option_tpcall(optc
, r
->argv
, inv
, r
->target
, &r
->e
);
1243 /* try to dispatch argument to one of the match parsers */
1244 for (m
= r
->matches
; m
; m
= m
->next
)
1248 if (m
->completed
|| !fw3_xt_has_match_parse(em
))
1251 if (optc
< em
->option_offset
||
1252 optc
>= (em
->option_offset
+ 256))
1255 xtables_option_mpcall(optc
, r
->argv
, inv
, em
, &r
->e
);
1259 /* unhandled option, might belong to a protocol match */
1260 if ((em
= load_protomatch(r
)) != NULL
)
1262 init_match(r
, em
, false);
1264 r
->protocol_loaded
= true;
1271 warn("parse_option(): option '%s' needs argument", r
->argv
[optind
-1]);
1274 warn("parse_option(): unknown option '%s'", r
->argv
[optind
-1]);
1280 fw3_ipt_rule_addarg(struct fw3_ipt_rule
*r
, bool inv
,
1281 const char *k
, const char *v
)
1289 n
= inv
+ !!k
+ !!v
;
1290 tmp
= realloc(r
->argv
, (r
->argc
+ n
) * sizeof(*tmp
));
1298 r
->argv
[r
->argc
++] = fw3_strdup("!");
1300 r
->argv
[r
->argc
++] = fw3_strdup(k
);
1303 r
->argv
[r
->argc
++] = fw3_strdup(v
);
1306 static unsigned char *
1307 rule_mask(struct fw3_ipt_rule
*r
)
1310 unsigned char *p
, *mask
= NULL
;
1311 struct xtables_rule_match
*m
;
1313 #define SZ(x) XT_ALIGN(sizeof(struct x))
1315 #ifndef DISABLE_IPV6
1316 if (r
->h
->family
== FW3_FAMILY_V6
)
1320 for (m
= r
->matches
; m
; m
= m
->next
)
1321 s
+= SZ(ip6t_entry_match
) + m
->match
->size
;
1323 s
+= SZ(ip6t_entry_target
);
1325 s
+= r
->target
->size
;
1327 mask
= fw3_alloc(s
);
1328 memset(mask
, 0xFF, SZ(ip6t_entry
));
1329 p
= mask
+ SZ(ip6t_entry
);
1331 for (m
= r
->matches
; m
; m
= m
->next
)
1333 memset(p
, 0xFF, SZ(ip6t_entry_match
) + m
->match
->userspacesize
);
1334 p
+= SZ(ip6t_entry_match
) + m
->match
->size
;
1337 memset(p
, 0xFF, SZ(ip6t_entry_target
) + (r
->target
) ? r
->target
->userspacesize
: 0);
1344 for (m
= r
->matches
; m
; m
= m
->next
)
1345 s
+= SZ(ipt_entry_match
) + m
->match
->size
;
1347 s
+= SZ(ipt_entry_target
);
1349 s
+= r
->target
->size
;
1351 mask
= fw3_alloc(s
);
1352 memset(mask
, 0xFF, SZ(ipt_entry
));
1353 p
= mask
+ SZ(ipt_entry
);
1355 for (m
= r
->matches
; m
; m
= m
->next
)
1357 memset(p
, 0xFF, SZ(ipt_entry_match
) + m
->match
->userspacesize
);
1358 p
+= SZ(ipt_entry_match
) + m
->match
->size
;
1361 memset(p
, 0xFF, SZ(ipt_entry_target
) + (r
->target
) ? r
->target
->userspacesize
: 0);
1368 rule_build(struct fw3_ipt_rule
*r
)
1370 size_t s
, target_size
= (r
->target
) ? r
->target
->t
->u
.target_size
: 0;
1371 struct xtables_rule_match
*m
;
1373 #ifndef DISABLE_IPV6
1374 if (r
->h
->family
== FW3_FAMILY_V6
)
1376 struct ip6t_entry
*e6
;
1378 s
= XT_ALIGN(sizeof(struct ip6t_entry
));
1380 for (m
= r
->matches
; m
; m
= m
->next
)
1381 s
+= m
->match
->m
->u
.match_size
;
1383 e6
= fw3_alloc(s
+ target_size
);
1385 memcpy(e6
, &r
->e6
, sizeof(struct ip6t_entry
));
1387 e6
->target_offset
= s
;
1388 e6
->next_offset
= s
+ target_size
;
1392 for (m
= r
->matches
; m
; m
= m
->next
)
1394 memcpy(e6
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1395 s
+= m
->match
->m
->u
.match_size
;
1399 memcpy(e6
->elems
+ s
, r
->target
->t
, target_size
);
1406 struct ipt_entry
*e
;
1408 s
= XT_ALIGN(sizeof(struct ipt_entry
));
1410 for (m
= r
->matches
; m
; m
= m
->next
)
1411 s
+= m
->match
->m
->u
.match_size
;
1413 e
= fw3_alloc(s
+ target_size
);
1415 memcpy(e
, &r
->e
, sizeof(struct ipt_entry
));
1417 e
->target_offset
= s
;
1418 e
->next_offset
= s
+ target_size
;
1422 for (m
= r
->matches
; m
; m
= m
->next
)
1424 memcpy(e
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1425 s
+= m
->match
->m
->u
.match_size
;
1429 memcpy(e
->elems
+ s
, r
->target
->t
, target_size
);
1436 set_rule_tag(struct fw3_ipt_rule
*r
)
1440 const char *tag
= "!fw3";
1442 for (i
= 0; i
< r
->argc
; i
++)
1443 if (!strcmp(r
->argv
[i
], "--comment") && (i
+ 1) < r
->argc
)
1444 if (asprintf(&p
, "%s: %s", tag
, r
->argv
[i
+ 1]) > 0)
1446 free(r
->argv
[i
+ 1]);
1451 tmp
= realloc(r
->argv
, (r
->argc
+ 4) * sizeof(*r
->argv
));
1456 r
->argv
[r
->argc
++] = fw3_strdup("-m");
1457 r
->argv
[r
->argc
++] = fw3_strdup("comment");
1458 r
->argv
[r
->argc
++] = fw3_strdup("--comment");
1459 r
->argv
[r
->argc
++] = fw3_strdup(tag
);
1464 __fw3_ipt_rule_append(struct fw3_ipt_rule
*r
, bool repl
, const char *fmt
, ...)
1467 unsigned char *mask
;
1469 struct xtables_rule_match
*m
;
1470 struct xtables_match
*em
;
1471 struct xtables_target
*et
;
1472 struct xtables_globals
*g
;
1480 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
1483 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
1484 g
->opts
= g
->orig_opts
;
1491 while ((optc
= getopt_long(r
->argc
, r
->argv
, "-:m:j:", g
->opts
,
1497 em
= find_match(r
, optarg
);
1501 warn("fw3_ipt_rule_append(): Can't find match '%s'", optarg
);
1505 init_match(r
, em
, true);
1509 et
= get_target(r
, optarg
);
1513 warn("fw3_ipt_rule_append(): Can't find target '%s'", optarg
);
1520 if ((optarg
[0] == '!') && (optarg
[1] == '\0'))
1527 warn("fw3_ipt_rule_append(): Bad argument '%s'", optarg
);
1531 if (parse_option(r
, optc
, inv
))
1539 for (m
= r
->matches
; m
; m
= m
->next
)
1540 xtables_option_mfcall(m
->match
);
1543 xtables_option_tfcall(r
->target
);
1545 rule
= rule_build(r
);
1547 #ifndef DISABLE_IPV6
1548 if (r
->h
->family
== FW3_FAMILY_V6
)
1552 mask
= rule_mask(r
);
1554 while (ip6tc_delete_entry(buf
, rule
, mask
, r
->h
->handle
))
1556 rule_print(r
, "-D", buf
);
1562 rule_print(r
, "-A", buf
);
1564 if (!ip6tc_append_entry(buf
, rule
, r
->h
->handle
))
1565 warn("ip6tc_append_entry(): %s", ip6tc_strerror(errno
));
1572 mask
= rule_mask(r
);
1574 while (iptc_delete_entry(buf
, rule
, mask
, r
->h
->handle
))
1576 rule_print(r
, "-D", buf
);
1582 rule_print(r
, "-A", buf
);
1584 if (!iptc_append_entry(buf
, rule
, r
->h
->handle
))
1585 warn("iptc_append_entry(): %s\n", iptc_strerror(errno
));
1591 for (i
= 1; i
< r
->argc
; i
++)
1596 xtables_rule_matches_free(&r
->matches
);
1603 /* reset all targets and matches */
1604 for (em
= xtables_matches
; em
; em
= em
->next
)
1607 for (et
= xtables_targets
; et
; et
= et
->next
)
1613 xtables_free_opts(1);
1616 struct fw3_ipt_rule
*
1617 fw3_ipt_rule_create(struct fw3_ipt_handle
*handle
, struct fw3_protocol
*proto
,
1618 struct fw3_device
*in
, struct fw3_device
*out
,
1619 struct fw3_address
*src
, struct fw3_address
*dest
)
1621 struct fw3_ipt_rule
*r
;
1623 r
= fw3_ipt_rule_new(handle
);
1625 fw3_ipt_rule_proto(r
, proto
);
1626 fw3_ipt_rule_in_out(r
, in
, out
);
1627 fw3_ipt_rule_src_dest(r
, src
, dest
);
1633 xtables_register_match(struct xtables_match
*me
)
1636 static struct xtables_match
**tmp
;
1638 if (!xext
.register_match
)
1639 xext
.register_match
= dlsym(RTLD_NEXT
, "xtables_register_match");
1641 if (!xext
.register_match
)
1644 xext
.register_match(me
);
1648 for (i
= 0; i
< xext
.mcount
; i
++)
1649 if (xext
.matches
[i
] == me
)
1652 tmp
= realloc(xext
.matches
, sizeof(me
) * (xext
.mcount
+ 1));
1658 xext
.matches
[xext
.mcount
++] = me
;
1663 xtables_register_target(struct xtables_target
*me
)
1666 static struct xtables_target
**tmp
;
1668 if (!xext
.register_target
)
1669 xext
.register_target
= dlsym(RTLD_NEXT
, "xtables_register_target");
1671 if (!xext
.register_target
)
1674 xext
.register_target(me
);
1678 for (i
= 0; i
< xext
.tcount
; i
++)
1679 if (xext
.targets
[i
] == me
)
1682 tmp
= realloc(xext
.targets
, sizeof(me
) * (xext
.tcount
+ 1));
1688 xext
.targets
[xext
.tcount
++] = me
;