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 static struct option base_opts
[] = {
23 { .name
= "match", .has_arg
= 1, .val
= 'm' },
24 { .name
= "jump", .has_arg
= 1, .val
= 'j' },
25 { .name
= "append", .has_arg
= 1, .val
= 'A' },
29 static struct xtables_globals xtg
= {
31 .program_version
= "4",
32 .orig_opts
= base_opts
,
35 static struct xtables_globals xtg6
= {
37 .program_version
= "6",
38 .orig_opts
= base_opts
,
41 /* Required by certain extensions like SNAT and DNAT */
42 int kernel_version
= 0;
45 get_kernel_version(void)
47 static struct utsname uts
;
48 int x
= 0, y
= 0, z
= 0;
50 if (uname(&uts
) == -1)
51 sprintf(uts
.release
, "3.0.0");
53 sscanf(uts
.release
, "%d.%d.%d", &x
, &y
, &z
);
54 kernel_version
= 0x10000 * x
+ 0x100 * y
+ z
;
59 #define __ipt_module(x) libxt_##x##_init, libipt_##x##_init,
62 #define __ipt_module(x) libxt_##x##_init, libipt_##x##_init, libip6t_##x##_init,
65 static void fw3_init_extensions(void)
68 void (*initfuncs
[])(void) = { FW3_IPT_MODULES
};
70 for (i
= 0; i
< sizeof(initfuncs
)/sizeof(initfuncs
[0]); i
++)
75 struct fw3_ipt_handle
*
76 fw3_ipt_open(enum fw3_family family
, enum fw3_table table
)
78 struct fw3_ipt_handle
*h
;
80 h
= fw3_alloc(sizeof(*h
));
84 if (family
== FW3_FAMILY_V6
)
87 h
->family
= FW3_FAMILY_V6
;
89 h
->handle
= ip6tc_init(fw3_flag_names
[table
]);
91 xtables_set_params(&xtg6
);
92 xtables_set_nfproto(NFPROTO_IPV6
);
97 h
->family
= FW3_FAMILY_V4
;
99 h
->handle
= iptc_init(fw3_flag_names
[table
]);
101 xtables_set_params(&xtg
);
102 xtables_set_nfproto(NFPROTO_IPV4
);
112 fw3_init_extensions();
118 debug(struct fw3_ipt_handle
*h
, const char *fmt
, ...)
122 printf("%s -t %s ", (h
->family
== FW3_FAMILY_V6
) ? "ip6tables" : "iptables",
123 fw3_flag_names
[h
->table
]);
131 fw3_ipt_set_policy(struct fw3_ipt_handle
*h
, const char *chain
,
132 enum fw3_flag policy
)
135 debug(h
, "-P %s %s\n", chain
, fw3_flag_names
[policy
]);
138 if (h
->family
== FW3_FAMILY_V6
)
139 ip6tc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
142 iptc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
146 fw3_ipt_delete_chain(struct fw3_ipt_handle
*h
, const char *chain
)
150 debug(h
, "-F %s\n", chain
);
151 debug(h
, "-X %s\n", chain
);
155 if (h
->family
== FW3_FAMILY_V6
)
157 if (ip6tc_flush_entries(chain
, h
->handle
))
158 ip6tc_delete_chain(chain
, h
->handle
);
163 if (iptc_flush_entries(chain
, h
->handle
))
164 iptc_delete_chain(chain
, h
->handle
);
169 fw3_ipt_delete_rules(struct fw3_ipt_handle
*h
, const char *target
)
172 const struct ipt_entry
*e
;
178 if (h
->family
== FW3_FAMILY_V6
)
180 for (chain
= ip6tc_first_chain(h
->handle
);
182 chain
= ip6tc_next_chain(h
->handle
))
187 const struct ip6t_entry
*e6
;
188 for (num
= 0, e6
= ip6tc_first_rule(chain
, h
->handle
);
190 num
++, e6
= ip6tc_next_rule(e6
, h
->handle
))
192 t
= ip6tc_get_target(e6
, h
->handle
);
194 if (*t
&& !strcmp(t
, target
))
197 debug(h
, "-D %s %u\n", chain
, num
+ 1);
199 ip6tc_delete_num_entry(chain
, num
, h
->handle
);
210 for (chain
= iptc_first_chain(h
->handle
);
212 chain
= iptc_next_chain(h
->handle
))
217 for (num
= 0, e
= iptc_first_rule(chain
, h
->handle
);
219 num
++, e
= iptc_next_rule(e
, h
->handle
))
221 t
= iptc_get_target(e
, h
->handle
);
223 if (*t
&& !strcmp(t
, target
))
226 debug(h
, "-D %s %u\n", chain
, num
+ 1);
228 iptc_delete_num_entry(chain
, num
, h
->handle
);
239 fw3_ipt_create_chain(struct fw3_ipt_handle
*h
, const char *fmt
, ...)
245 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
249 debug(h
, "-N %s\n", buf
);
251 iptc_create_chain(buf
, h
->handle
);
255 fw3_ipt_flush(struct fw3_ipt_handle
*h
)
260 if (h
->family
== FW3_FAMILY_V6
)
262 for (chain
= ip6tc_first_chain(h
->handle
);
264 chain
= ip6tc_next_chain(h
->handle
))
266 ip6tc_flush_entries(chain
, h
->handle
);
269 for (chain
= ip6tc_first_chain(h
->handle
);
271 chain
= ip6tc_next_chain(h
->handle
))
273 ip6tc_delete_chain(chain
, h
->handle
);
279 for (chain
= iptc_first_chain(h
->handle
);
281 chain
= iptc_next_chain(h
->handle
))
283 iptc_flush_entries(chain
, h
->handle
);
286 for (chain
= iptc_first_chain(h
->handle
);
288 chain
= iptc_next_chain(h
->handle
))
290 iptc_delete_chain(chain
, h
->handle
);
296 fw3_ipt_commit(struct fw3_ipt_handle
*h
)
301 if (h
->family
== FW3_FAMILY_V6
)
303 rv
= ip6tc_commit(h
->handle
);
305 fprintf(stderr
, "ip6tc_commit(): %s\n", ip6tc_strerror(errno
));
310 rv
= iptc_commit(h
->handle
);
312 fprintf(stderr
, "iptc_commit(): %s\n", iptc_strerror(errno
));
320 dlclose(h
->libv
[h
->libc
]);
329 struct fw3_ipt_rule
*
330 fw3_ipt_rule_new(struct fw3_ipt_handle
*h
)
332 struct fw3_ipt_rule
*r
;
334 r
= fw3_alloc(sizeof(*r
));
337 r
->argv
= fw3_alloc(sizeof(char *));
338 r
->argv
[r
->argc
++] = "fw3";
345 is_chain(struct fw3_ipt_handle
*h
, const char *name
)
348 if (h
->family
== FW3_FAMILY_V6
)
349 return ip6tc_is_chain(name
, h
->handle
);
352 return iptc_is_chain(name
, h
->handle
);
356 get_protoname(struct fw3_ipt_rule
*r
)
358 const struct xtables_pprot
*pp
;
361 for (pp
= xtables_chain_protos
; pp
->name
; pp
++)
362 if (pp
->num
== r
->protocol
)
363 return (char *)pp
->name
;
369 load_extension(struct fw3_ipt_handle
*h
, const char *name
)
373 const char *pfx
= (h
->family
== FW3_FAMILY_V6
) ? "libip6t" : "libipt";
375 snprintf(path
, sizeof(path
), "/usr/lib/iptables/libxt_%s.so", name
);
376 if (!(lib
= dlopen(path
, RTLD_NOW
)))
378 snprintf(path
, sizeof(path
), "/usr/lib/iptables/%s_%s.so", pfx
, name
);
379 lib
= dlopen(path
, RTLD_NOW
);
385 tmp
= realloc(h
->libv
, sizeof(lib
) * (h
->libc
+ 1));
391 h
->libv
[h
->libc
++] = lib
;
396 static struct xtables_match
*
397 find_match(struct fw3_ipt_rule
*r
, const char *name
)
399 struct xtables_match
*m
;
401 m
= xtables_find_match(name
, XTF_DONT_LOAD
, &r
->matches
);
403 if (!m
&& load_extension(r
->h
, name
))
404 m
= xtables_find_match(name
, XTF_DONT_LOAD
, &r
->matches
);
410 init_match(struct fw3_ipt_rule
*r
, struct xtables_match
*m
, bool no_clone
)
413 struct xtables_globals
*g
;
418 s
= XT_ALIGN(sizeof(struct xt_entry_match
)) + m
->size
;
422 fw3_xt_set_match_name(m
);
424 m
->m
->u
.user
.revision
= m
->revision
;
425 m
->m
->u
.match_size
= s
;
427 /* free previous userspace data */
428 fw3_xt_free_match_udata(m
);
433 /* don't merge options if no_clone is set and this match is a clone */
434 if (no_clone
&& (m
== m
->next
))
437 /* merge option table */
438 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
439 fw3_xt_merge_match_options(g
, m
);
443 need_protomatch(struct fw3_ipt_rule
*r
, const char *pname
)
448 if (!xtables_find_match(pname
, XTF_DONT_LOAD
, NULL
))
451 return !r
->protocol_loaded
;
454 static struct xtables_match
*
455 load_protomatch(struct fw3_ipt_rule
*r
)
457 const char *pname
= get_protoname(r
);
459 if (!need_protomatch(r
, pname
))
462 return find_match(r
, pname
);
465 static struct xtables_target
*
466 find_target(struct fw3_ipt_rule
*r
, const char *name
)
468 struct xtables_target
*t
;
470 if (is_chain(r
->h
, name
))
471 return xtables_find_target(XT_STANDARD_TARGET
, XTF_LOAD_MUST_SUCCEED
);
473 t
= xtables_find_target(name
, XTF_DONT_LOAD
);
475 if (!t
&& load_extension(r
->h
, name
))
476 t
= xtables_find_target(name
, XTF_DONT_LOAD
);
481 static struct xtables_target
*
482 get_target(struct fw3_ipt_rule
*r
, const char *name
)
485 struct xtables_target
*t
;
486 struct xtables_globals
*g
;
488 t
= find_target(r
, name
);
493 s
= XT_ALIGN(sizeof(struct xt_entry_target
)) + t
->size
;
496 fw3_xt_set_target_name(t
, name
);
498 t
->t
->u
.user
.revision
= t
->revision
;
499 t
->t
->u
.target_size
= s
;
501 /* free previous userspace data */
502 fw3_xt_free_target_udata(t
);
507 /* merge option table */
508 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
509 fw3_xt_merge_target_options(g
, t
);
517 fw3_ipt_rule_proto(struct fw3_ipt_rule
*r
, struct fw3_protocol
*proto
)
521 if (!proto
|| proto
->any
)
524 pr
= proto
->protocol
;
527 if (r
->h
->family
== FW3_FAMILY_V6
)
532 r
->e6
.ipv6
.proto
= pr
;
533 r
->e6
.ipv6
.flags
|= IP6T_F_PROTO
;
536 r
->e6
.ipv6
.invflags
|= XT_INV_PROTO
;
544 r
->e
.ip
.invflags
|= XT_INV_PROTO
;
551 fw3_ipt_rule_in_out(struct fw3_ipt_rule
*r
,
552 struct fw3_device
*in
, struct fw3_device
*out
)
555 if (r
->h
->family
== FW3_FAMILY_V6
)
559 xtables_parse_interface(in
->name
, r
->e6
.ipv6
.iniface
,
560 r
->e6
.ipv6
.iniface_mask
);
563 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_IN
;
566 if (out
&& !out
->any
)
568 xtables_parse_interface(out
->name
, r
->e6
.ipv6
.outiface
,
569 r
->e6
.ipv6
.outiface_mask
);
572 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_OUT
;
580 xtables_parse_interface(in
->name
, r
->e
.ip
.iniface
,
581 r
->e
.ip
.iniface_mask
);
584 r
->e
.ip
.invflags
|= IPT_INV_VIA_IN
;
587 if (out
&& !out
->any
)
589 xtables_parse_interface(out
->name
, r
->e
.ip
.outiface
,
590 r
->e
.ip
.outiface_mask
);
593 r
->e
.ip
.invflags
|= IPT_INV_VIA_OUT
;
600 ip4prefix2mask(int prefix
, struct in_addr
*mask
)
602 mask
->s_addr
= htonl(~((1 << (32 - prefix
)) - 1));
607 ip6prefix2mask(int prefix
, struct in6_addr
*mask
)
609 char *p
= (char *)mask
;
613 memset(p
, 0xff, prefix
/ 8);
614 memset(p
+ (prefix
/ 8) + 1, 0, (128 - prefix
) / 8);
615 p
[prefix
/ 8] = 0xff << (8 - (prefix
& 7));
619 memset(mask
, 0, sizeof(*mask
));
625 fw3_ipt_rule_src_dest(struct fw3_ipt_rule
*r
,
626 struct fw3_address
*src
, struct fw3_address
*dest
)
628 if ((src
&& src
->range
) || (dest
&& dest
->range
))
630 fw3_ipt_rule_addarg(r
, false, "-m", "iprange");
637 fw3_ipt_rule_addarg(r
, src
->invert
, "--src-range",
638 fw3_address_to_string(src
, false));
641 else if (r
->h
->family
== FW3_FAMILY_V6
)
643 r
->e6
.ipv6
.src
= src
->address
.v6
;
644 ip6prefix2mask(src
->mask
, &r
->e6
.ipv6
.smsk
);
647 for (i
= 0; i
< 4; i
++)
648 r
->e6
.ipv6
.src
.s6_addr32
[i
] &= r
->e6
.ipv6
.smsk
.s6_addr32
[i
];
651 r
->e6
.ipv6
.invflags
|= IP6T_INV_SRCIP
;
656 r
->e
.ip
.src
= src
->address
.v4
;
657 ip4prefix2mask(src
->mask
, &r
->e
.ip
.smsk
);
659 r
->e
.ip
.src
.s_addr
&= r
->e
.ip
.smsk
.s_addr
;
662 r
->e
.ip
.invflags
|= IPT_INV_SRCIP
;
666 if (dest
&& dest
->set
)
670 fw3_ipt_rule_addarg(r
, dest
->invert
, "--dst-range",
671 fw3_address_to_string(dest
, false));
674 else if (r
->h
->family
== FW3_FAMILY_V6
)
676 r
->e6
.ipv6
.dst
= dest
->address
.v6
;
677 ip6prefix2mask(dest
->mask
, &r
->e6
.ipv6
.dmsk
);
680 for (i
= 0; i
< 4; i
++)
681 r
->e6
.ipv6
.dst
.s6_addr32
[i
] &= r
->e6
.ipv6
.dmsk
.s6_addr32
[i
];
684 r
->e6
.ipv6
.invflags
|= IP6T_INV_DSTIP
;
689 r
->e
.ip
.dst
= dest
->address
.v4
;
690 ip4prefix2mask(dest
->mask
, &r
->e
.ip
.dmsk
);
692 r
->e
.ip
.dst
.s_addr
&= r
->e
.ip
.dmsk
.s_addr
;
695 r
->e
.ip
.invflags
|= IPT_INV_DSTIP
;
701 fw3_ipt_rule_sport_dport(struct fw3_ipt_rule
*r
,
702 struct fw3_port
*sp
, struct fw3_port
*dp
)
704 char buf
[sizeof("65535:65535\0")];
706 if ((!sp
|| !sp
->set
) && (!dp
|| !dp
->set
))
709 if (!get_protoname(r
))
714 if (sp
->port_min
== sp
->port_max
)
715 sprintf(buf
, "%u", sp
->port_min
);
717 sprintf(buf
, "%u:%u", sp
->port_min
, sp
->port_max
);
719 fw3_ipt_rule_addarg(r
, sp
->invert
, "--sport", buf
);
724 if (dp
->port_min
== dp
->port_max
)
725 sprintf(buf
, "%u", dp
->port_min
);
727 sprintf(buf
, "%u:%u", dp
->port_min
, dp
->port_max
);
729 fw3_ipt_rule_addarg(r
, dp
->invert
, "--dport", buf
);
734 fw3_ipt_rule_mac(struct fw3_ipt_rule
*r
, struct fw3_mac
*mac
)
739 fw3_ipt_rule_addarg(r
, false, "-m", "mac");
740 fw3_ipt_rule_addarg(r
, mac
->invert
, "--mac-source", ether_ntoa(&mac
->mac
));
744 fw3_ipt_rule_icmptype(struct fw3_ipt_rule
*r
, struct fw3_icmptype
*icmp
)
746 char buf
[sizeof("255/255\0")];
752 if (r
->h
->family
== FW3_FAMILY_V6
)
754 if (icmp
->code6_min
== 0 && icmp
->code6_max
== 0xFF)
755 sprintf(buf
, "%u", icmp
->type6
);
757 sprintf(buf
, "%u/%u", icmp
->type6
, icmp
->code6_min
);
759 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmpv6-type", buf
);
764 if (icmp
->code_min
== 0 && icmp
->code_max
== 0xFF)
765 sprintf(buf
, "%u", icmp
->type
);
767 sprintf(buf
, "%u/%u", icmp
->type
, icmp
->code_min
);
769 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmp-type", buf
);
774 fw3_ipt_rule_limit(struct fw3_ipt_rule
*r
, struct fw3_limit
*limit
)
776 char buf
[sizeof("-4294967296/second\0")];
778 if (!limit
|| limit
->rate
<= 0)
781 fw3_ipt_rule_addarg(r
, false, "-m", "limit");
783 sprintf(buf
, "%u/%s", limit
->rate
, fw3_limit_units
[limit
->unit
]);
784 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit", buf
);
786 if (limit
->burst
> 0)
788 sprintf(buf
, "%u", limit
->burst
);
789 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit-burst", buf
);
794 fw3_ipt_rule_ipset(struct fw3_ipt_rule
*r
, struct fw3_ipset
*ipset
,
797 char buf
[sizeof("dst,dst,dst\0")];
800 struct fw3_ipset_datatype
*type
;
805 list_for_each_entry(type
, &ipset
->datatypes
, list
)
810 p
+= sprintf(p
, "%s", type
->dest
? "dst" : "src");
813 fw3_ipt_rule_addarg(r
, false, "-m", "set");
815 fw3_ipt_rule_addarg(r
, invert
, "--match-set",
816 ipset
->external
? ipset
->external
: ipset
->name
);
818 fw3_ipt_rule_addarg(r
, false, buf
, NULL
);
822 fw3_ipt_rule_time(struct fw3_ipt_rule
*r
, struct fw3_time
*time
)
825 struct tm empty
= { 0 };
827 char buf
[84]; /* sizeof("1,2,3,...,30,31\0") */
830 bool d1
= memcmp(&time
->datestart
, &empty
, sizeof(empty
));
831 bool d2
= memcmp(&time
->datestop
, &empty
, sizeof(empty
));
833 if (!d1
&& !d2
&& !time
->timestart
&& !time
->timestop
&&
834 !(time
->monthdays
& 0xFFFFFFFE) && !(time
->weekdays
& 0xFE))
839 fw3_ipt_rule_addarg(r
, false, "-m", "time");
842 fw3_ipt_rule_addarg(r
, false, "--utc", NULL
);
846 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestart
);
847 fw3_ipt_rule_addarg(r
, false, "--datestart", buf
);
852 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestop
);
853 fw3_ipt_rule_addarg(r
, false, "--datestop", buf
);
858 sprintf(buf
, "%02d:%02d:%02d",
859 time
->timestart
/ 3600,
860 time
->timestart
% 3600 / 60,
861 time
->timestart
% 60);
863 fw3_ipt_rule_addarg(r
, false, "--timestart", buf
);
868 sprintf(buf
, "%02d:%02d:%02d",
869 time
->timestop
/ 3600,
870 time
->timestop
% 3600 / 60,
871 time
->timestop
% 60);
873 fw3_ipt_rule_addarg(r
, false, "--timestop", buf
);
876 if (time
->monthdays
& 0xFFFFFFFE)
878 for (i
= 1, p
= buf
; i
< 32; i
++)
880 if (hasbit(time
->monthdays
, i
))
885 p
+= sprintf(p
, "%u", i
);
889 fw3_ipt_rule_addarg(r
, hasbit(time
->monthdays
, 0), "--monthdays", buf
);
892 if (time
->weekdays
& 0xFE)
894 for (i
= 1, p
= buf
; i
< 8; i
++)
896 if (hasbit(time
->weekdays
, i
))
901 p
+= sprintf(p
, "%u", i
);
905 fw3_ipt_rule_addarg(r
, hasbit(time
->weekdays
, 0), "--weekdays", buf
);
910 fw3_ipt_rule_mark(struct fw3_ipt_rule
*r
, struct fw3_mark
*mark
)
912 char buf
[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
914 if (!mark
|| !mark
->set
)
917 if (mark
->mask
< 0xFFFFFFFF)
918 sprintf(buf
, "0x%x/0x%x", mark
->mark
, mark
->mask
);
920 sprintf(buf
, "0x%x", mark
->mark
);
922 fw3_ipt_rule_addarg(r
, false, "-m", "mark");
923 fw3_ipt_rule_addarg(r
, mark
->invert
, "--mark", buf
);
927 fw3_ipt_rule_comment(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
936 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
939 fw3_ipt_rule_addarg(r
, false, "-m", "comment");
940 fw3_ipt_rule_addarg(r
, false, "--comment", buf
);
944 fw3_ipt_rule_extra(struct fw3_ipt_rule
*r
, const char *extra
)
948 if (!extra
|| !*extra
)
951 s
= fw3_strdup(extra
);
953 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
955 tmp
= realloc(r
->argv
, (r
->argc
+ 1) * sizeof(*r
->argv
));
961 r
->argv
[r
->argc
++] = fw3_strdup(p
);
969 rule_print6(struct ip6t_entry
*e
)
971 char buf
[INET6_ADDRSTRLEN
];
974 if (e
->ipv6
.flags
& IP6T_F_PROTO
)
976 if (e
->ipv6
.flags
& XT_INV_PROTO
)
979 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e6
));
982 printf(" -p %s", pname
);
984 printf(" -p %u", e
->ipv6
.proto
);
987 if (e
->ipv6
.iniface
[0])
989 if (e
->ipv6
.flags
& IP6T_INV_VIA_IN
)
992 printf(" -i %s", e
->ipv6
.iniface
);
995 if (e
->ipv6
.outiface
[0])
997 if (e
->ipv6
.flags
& IP6T_INV_VIA_OUT
)
1000 printf(" -o %s", e
->ipv6
.outiface
);
1003 if (memcmp(&e
->ipv6
.src
, &in6addr_any
, sizeof(struct in6_addr
)))
1005 if (e
->ipv6
.flags
& IP6T_INV_SRCIP
)
1008 printf(" -s %s/%u", inet_ntop(AF_INET6
, &e
->ipv6
.src
, buf
, sizeof(buf
)),
1009 xtables_ip6mask_to_cidr(&e
->ipv6
.smsk
));
1012 if (memcmp(&e
->ipv6
.dst
, &in6addr_any
, sizeof(struct in6_addr
)))
1014 if (e
->ipv6
.flags
& IP6T_INV_DSTIP
)
1017 printf(" -d %s/%u", inet_ntop(AF_INET6
, &e
->ipv6
.dst
, buf
, sizeof(buf
)),
1018 xtables_ip6mask_to_cidr(&e
->ipv6
.dmsk
));
1024 rule_print4(struct ipt_entry
*e
)
1026 struct in_addr in_zero
= { 0 };
1027 char buf
[sizeof("255.255.255.255\0")];
1032 if (e
->ip
.flags
& XT_INV_PROTO
)
1035 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e
));
1038 printf(" -p %s", pname
);
1040 printf(" -p %u", e
->ip
.proto
);
1043 if (e
->ip
.iniface
[0])
1045 if (e
->ip
.flags
& IPT_INV_VIA_IN
)
1048 printf(" -i %s", e
->ip
.iniface
);
1051 if (e
->ip
.outiface
[0])
1053 if (e
->ip
.flags
& IPT_INV_VIA_OUT
)
1056 printf(" -o %s", e
->ip
.outiface
);
1059 if (memcmp(&e
->ip
.src
, &in_zero
, sizeof(struct in_addr
)))
1061 if (e
->ip
.flags
& IPT_INV_SRCIP
)
1064 printf(" -s %s/%u", inet_ntop(AF_INET
, &e
->ip
.src
, buf
, sizeof(buf
)),
1065 xtables_ipmask_to_cidr(&e
->ip
.smsk
));
1068 if (memcmp(&e
->ip
.dst
, &in_zero
, sizeof(struct in_addr
)))
1070 if (e
->ip
.flags
& IPT_INV_DSTIP
)
1073 printf(" -d %s/%u", inet_ntop(AF_INET
, &e
->ip
.dst
, buf
, sizeof(buf
)),
1074 xtables_ipmask_to_cidr(&e
->ip
.dmsk
));
1079 rule_print(struct fw3_ipt_rule
*r
, const char *chain
)
1081 struct xtables_rule_match
*rm
;
1082 struct xtables_match
*m
;
1083 struct xtables_target
*t
;
1085 debug(r
->h
, "-A %s", chain
);
1087 #ifndef DISABLE_IPV6
1088 if (r
->h
->family
== FW3_FAMILY_V6
)
1089 rule_print6(&r
->e6
);
1094 for (rm
= r
->matches
; rm
; rm
= rm
->next
)
1097 printf(" -m %s", fw3_xt_get_match_name(m
));
1100 m
->save(&r
->e
.ip
, m
->m
);
1106 printf(" -j %s", fw3_xt_get_target_name(t
));
1109 t
->save(&r
->e
.ip
, t
->t
);
1116 parse_option(struct fw3_ipt_rule
*r
, int optc
, bool inv
)
1118 struct xtables_rule_match
*m
;
1119 struct xtables_match
*em
;
1121 /* is a target option */
1122 if (r
->target
&& fw3_xt_has_target_parse(r
->target
) &&
1123 optc
>= r
->target
->option_offset
&&
1124 optc
< (r
->target
->option_offset
+ 256))
1126 xtables_option_tpcall(optc
, r
->argv
, inv
, r
->target
, &r
->e
);
1130 /* try to dispatch argument to one of the match parsers */
1131 for (m
= r
->matches
; m
; m
= m
->next
)
1135 if (m
->completed
|| !fw3_xt_has_match_parse(em
))
1138 if (optc
< em
->option_offset
||
1139 optc
>= (em
->option_offset
+ 256))
1142 xtables_option_mpcall(optc
, r
->argv
, inv
, em
, &r
->e
);
1146 /* unhandled option, might belong to a protocol match */
1147 if ((em
= load_protomatch(r
)) != NULL
)
1149 init_match(r
, em
, false);
1151 r
->protocol_loaded
= true;
1158 fprintf(stderr
, "parse_option(): option '%s' needs argument\n",
1162 fprintf(stderr
, "parse_option(): unknown option '%s'\n",
1169 fw3_ipt_rule_addarg(struct fw3_ipt_rule
*r
, bool inv
,
1170 const char *k
, const char *v
)
1178 n
= inv
+ !!k
+ !!v
;
1179 tmp
= realloc(r
->argv
, (r
->argc
+ n
) * sizeof(*tmp
));
1187 r
->argv
[r
->argc
++] = fw3_strdup("!");
1189 r
->argv
[r
->argc
++] = fw3_strdup(k
);
1192 r
->argv
[r
->argc
++] = fw3_strdup(v
);
1196 fw3_ipt_rule_append(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
1199 struct xtables_rule_match
*m
;
1200 struct xtables_match
*em
;
1201 struct xtables_target
*et
;
1202 struct xtables_globals
*g
;
1203 struct ipt_entry
*e
;
1211 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
1214 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
1215 g
->opts
= g
->orig_opts
;
1220 while ((optc
= getopt_long(r
->argc
, r
->argv
, "m:j:", g
->opts
, NULL
)) != -1)
1225 em
= find_match(r
, optarg
);
1229 fprintf(stderr
, "fw3_ipt_rule_append(): Can't find match '%s'\n", optarg
);
1233 init_match(r
, em
, true);
1237 et
= get_target(r
, optarg
);
1241 fprintf(stderr
, "fw3_ipt_rule_append(): Can't find target '%s'\n", optarg
);
1248 if ((optarg
[0] == '!') && (optarg
[1] == '\0'))
1254 fprintf(stderr
, "fw3_ipt_rule_append(): Bad argument '%s'\n", optarg
);
1258 if (parse_option(r
, optc
, inv
))
1266 for (m
= r
->matches
; m
; m
= m
->next
)
1267 xtables_option_mfcall(m
->match
);
1270 xtables_option_tfcall(r
->target
);
1275 #ifndef DISABLE_IPV6
1276 if (r
->h
->family
== FW3_FAMILY_V6
)
1278 struct ip6t_entry
*e6
;
1280 s
= XT_ALIGN(sizeof(struct ip6t_entry
));
1282 for (m
= r
->matches
; m
; m
= m
->next
)
1283 s
+= m
->match
->m
->u
.match_size
;
1285 e6
= fw3_alloc(s
+ r
->target
->t
->u
.target_size
);
1287 memcpy(e6
, &r
->e6
, sizeof(struct ip6t_entry
));
1289 e6
->target_offset
= s
;
1290 e6
->next_offset
= s
+ r
->target
->t
->u
.target_size
;
1294 for (m
= r
->matches
; m
; m
= m
->next
)
1296 memcpy(e6
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1297 s
+= m
->match
->m
->u
.match_size
;
1300 memcpy(e6
->elems
+ s
, r
->target
->t
, r
->target
->t
->u
.target_size
);
1301 ip6tc_append_entry(buf
, e6
, r
->h
->handle
);
1307 s
= XT_ALIGN(sizeof(struct ipt_entry
));
1309 for (m
= r
->matches
; m
; m
= m
->next
)
1310 s
+= m
->match
->m
->u
.match_size
;
1312 e
= fw3_alloc(s
+ r
->target
->t
->u
.target_size
);
1314 memcpy(e
, &r
->e
, sizeof(struct ipt_entry
));
1316 e
->target_offset
= s
;
1317 e
->next_offset
= s
+ r
->target
->t
->u
.target_size
;
1321 for (m
= r
->matches
; m
; m
= m
->next
)
1323 memcpy(e
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1324 s
+= m
->match
->m
->u
.match_size
;
1327 memcpy(e
->elems
+ s
, r
->target
->t
, r
->target
->t
->u
.target_size
);
1329 if (!iptc_append_entry(buf
, e
, r
->h
->handle
))
1330 fprintf(stderr
, "iptc_append_entry(): %s\n", iptc_strerror(errno
));
1336 for (i
= 1; i
< r
->argc
; i
++)
1341 xtables_rule_matches_free(&r
->matches
);
1348 /* reset all targets and matches */
1349 for (em
= xtables_matches
; em
; em
= em
->next
)
1352 for (et
= xtables_targets
; et
; et
= et
->next
)
1358 xtables_free_opts(1);
1361 struct fw3_ipt_rule
*
1362 fw3_ipt_rule_create(struct fw3_ipt_handle
*handle
, struct fw3_protocol
*proto
,
1363 struct fw3_device
*in
, struct fw3_device
*out
,
1364 struct fw3_address
*src
, struct fw3_address
*dest
)
1366 struct fw3_ipt_rule
*r
;
1368 r
= fw3_ipt_rule_new(handle
);
1370 fw3_ipt_rule_proto(r
, proto
);
1371 fw3_ipt_rule_in_out(r
, in
, out
);
1372 fw3_ipt_rule_src_dest(r
, src
, dest
);