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' },
28 static struct xtables_globals xtg
= {
30 .program_version
= "4",
31 .orig_opts
= base_opts
,
34 static struct xtables_globals xtg6
= {
36 .program_version
= "6",
37 .orig_opts
= base_opts
,
40 /* Required by certain extensions like SNAT and DNAT */
41 int kernel_version
= 0;
44 get_kernel_version(void)
46 static struct utsname uts
;
47 int x
= 0, y
= 0, z
= 0;
49 if (uname(&uts
) == -1)
50 sprintf(uts
.release
, "3.0.0");
52 sscanf(uts
.release
, "%d.%d.%d", &x
, &y
, &z
);
53 kernel_version
= 0x10000 * x
+ 0x100 * y
+ z
;
58 #define __ipt_module(x) libxt_##x##_init, libipt_##x##_init,
61 #define __ipt_module(x) libxt_##x##_init, libipt_##x##_init, libip6t_##x##_init,
64 static void fw3_init_extensions(void)
67 void (*initfuncs
[])(void) = { FW3_IPT_MODULES
};
69 for (i
= 0; i
< sizeof(initfuncs
)/sizeof(initfuncs
[0]); i
++)
74 struct fw3_ipt_handle
*
75 fw3_ipt_open(enum fw3_family family
, enum fw3_table table
)
77 struct fw3_ipt_handle
*h
;
79 h
= fw3_alloc(sizeof(*h
));
83 if (family
== FW3_FAMILY_V6
)
86 h
->family
= FW3_FAMILY_V6
;
88 h
->handle
= ip6tc_init(fw3_flag_names
[table
]);
90 xtables_set_params(&xtg6
);
91 xtables_set_nfproto(NFPROTO_IPV6
);
96 h
->family
= FW3_FAMILY_V4
;
98 h
->handle
= iptc_init(fw3_flag_names
[table
]);
100 xtables_set_params(&xtg
);
101 xtables_set_nfproto(NFPROTO_IPV4
);
111 fw3_init_extensions();
117 debug(struct fw3_ipt_handle
*h
, const char *fmt
, ...)
121 printf("%s -t %s ", (h
->family
== FW3_FAMILY_V6
) ? "ip6tables" : "iptables",
122 fw3_flag_names
[h
->table
]);
130 fw3_ipt_set_policy(struct fw3_ipt_handle
*h
, const char *chain
,
131 enum fw3_flag policy
)
134 debug(h
, "-P %s %s\n", chain
, fw3_flag_names
[policy
]);
137 if (h
->family
== FW3_FAMILY_V6
)
138 ip6tc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
141 iptc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
145 fw3_ipt_flush_chain(struct fw3_ipt_handle
*h
, const char *chain
)
148 debug(h
, "-F %s\n", chain
);
151 if (h
->family
== FW3_FAMILY_V6
)
152 ip6tc_flush_entries(chain
, h
->handle
);
155 iptc_flush_entries(chain
, h
->handle
);
159 delete_rules(struct fw3_ipt_handle
*h
, const char *target
)
162 const struct ipt_entry
*e
;
168 if (h
->family
== FW3_FAMILY_V6
)
170 for (chain
= ip6tc_first_chain(h
->handle
);
172 chain
= ip6tc_next_chain(h
->handle
))
177 const struct ip6t_entry
*e6
;
178 for (num
= 0, e6
= ip6tc_first_rule(chain
, h
->handle
);
180 num
++, e6
= ip6tc_next_rule(e6
, h
->handle
))
182 t
= ip6tc_get_target(e6
, h
->handle
);
184 if (*t
&& !strcmp(t
, target
))
187 debug(h
, "-D %s %u\n", chain
, num
+ 1);
189 ip6tc_delete_num_entry(chain
, num
, h
->handle
);
200 for (chain
= iptc_first_chain(h
->handle
);
202 chain
= iptc_next_chain(h
->handle
))
207 for (num
= 0, e
= iptc_first_rule(chain
, h
->handle
);
209 num
++, e
= iptc_next_rule(e
, h
->handle
))
211 t
= iptc_get_target(e
, h
->handle
);
213 if (*t
&& !strcmp(t
, target
))
216 debug(h
, "-D %s %u\n", chain
, num
+ 1);
218 iptc_delete_num_entry(chain
, num
, h
->handle
);
229 fw3_ipt_delete_chain(struct fw3_ipt_handle
*h
, const char *chain
)
231 delete_rules(h
, chain
);
234 debug(h
, "-X %s\n", chain
);
237 if (h
->family
== FW3_FAMILY_V6
)
238 ip6tc_delete_chain(chain
, h
->handle
);
241 iptc_delete_chain(chain
, h
->handle
);
245 fw3_ipt_create_chain(struct fw3_ipt_handle
*h
, const char *fmt
, ...)
251 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
255 debug(h
, "-N %s\n", buf
);
257 iptc_create_chain(buf
, h
->handle
);
261 fw3_ipt_flush(struct fw3_ipt_handle
*h
)
266 if (h
->family
== FW3_FAMILY_V6
)
268 for (chain
= ip6tc_first_chain(h
->handle
);
270 chain
= ip6tc_next_chain(h
->handle
))
272 ip6tc_flush_entries(chain
, h
->handle
);
275 for (chain
= ip6tc_first_chain(h
->handle
);
277 chain
= ip6tc_next_chain(h
->handle
))
279 ip6tc_delete_chain(chain
, h
->handle
);
285 for (chain
= iptc_first_chain(h
->handle
);
287 chain
= iptc_next_chain(h
->handle
))
289 iptc_flush_entries(chain
, h
->handle
);
292 for (chain
= iptc_first_chain(h
->handle
);
294 chain
= iptc_next_chain(h
->handle
))
296 iptc_delete_chain(chain
, h
->handle
);
302 fw3_ipt_commit(struct fw3_ipt_handle
*h
)
307 if (h
->family
== FW3_FAMILY_V6
)
309 rv
= ip6tc_commit(h
->handle
);
311 warn("ip6tc_commit(): %s", ip6tc_strerror(errno
));
316 rv
= iptc_commit(h
->handle
);
318 warn("iptc_commit(): %s", iptc_strerror(errno
));
323 fw3_ipt_close(struct fw3_ipt_handle
*h
)
330 dlclose(h
->libv
[h
->libc
]);
339 struct fw3_ipt_rule
*
340 fw3_ipt_rule_new(struct fw3_ipt_handle
*h
)
342 struct fw3_ipt_rule
*r
;
344 r
= fw3_alloc(sizeof(*r
));
347 r
->argv
= fw3_alloc(sizeof(char *));
348 r
->argv
[r
->argc
++] = "fw3";
355 is_chain(struct fw3_ipt_handle
*h
, const char *name
)
358 if (h
->family
== FW3_FAMILY_V6
)
359 return ip6tc_is_chain(name
, h
->handle
);
362 return iptc_is_chain(name
, h
->handle
);
366 get_protoname(struct fw3_ipt_rule
*r
)
368 const struct xtables_pprot
*pp
;
371 for (pp
= xtables_chain_protos
; pp
->name
; pp
++)
372 if (pp
->num
== r
->protocol
)
373 return (char *)pp
->name
;
379 load_extension(struct fw3_ipt_handle
*h
, const char *name
)
383 const char *pfx
= (h
->family
== FW3_FAMILY_V6
) ? "libip6t" : "libipt";
385 snprintf(path
, sizeof(path
), "/usr/lib/iptables/libxt_%s.so", name
);
386 if (!(lib
= dlopen(path
, RTLD_NOW
)))
388 snprintf(path
, sizeof(path
), "/usr/lib/iptables/%s_%s.so", pfx
, name
);
389 lib
= dlopen(path
, RTLD_NOW
);
395 tmp
= realloc(h
->libv
, sizeof(lib
) * (h
->libc
+ 1));
401 h
->libv
[h
->libc
++] = lib
;
406 static struct xtables_match
*
407 find_match(struct fw3_ipt_rule
*r
, const char *name
)
409 struct xtables_match
*m
;
411 m
= xtables_find_match(name
, XTF_DONT_LOAD
, &r
->matches
);
413 if (!m
&& load_extension(r
->h
, name
))
414 m
= xtables_find_match(name
, XTF_DONT_LOAD
, &r
->matches
);
420 init_match(struct fw3_ipt_rule
*r
, struct xtables_match
*m
, bool no_clone
)
423 struct xtables_globals
*g
;
428 s
= XT_ALIGN(sizeof(struct xt_entry_match
)) + m
->size
;
432 fw3_xt_set_match_name(m
);
434 m
->m
->u
.user
.revision
= m
->revision
;
435 m
->m
->u
.match_size
= s
;
437 /* free previous userspace data */
438 fw3_xt_free_match_udata(m
);
443 /* don't merge options if no_clone is set and this match is a clone */
444 if (no_clone
&& (m
== m
->next
))
447 /* merge option table */
448 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
449 fw3_xt_merge_match_options(g
, m
);
453 need_protomatch(struct fw3_ipt_rule
*r
, const char *pname
)
458 if (!xtables_find_match(pname
, XTF_DONT_LOAD
, NULL
))
461 return !r
->protocol_loaded
;
464 static struct xtables_match
*
465 load_protomatch(struct fw3_ipt_rule
*r
)
467 const char *pname
= get_protoname(r
);
469 if (!need_protomatch(r
, pname
))
472 return find_match(r
, pname
);
475 static struct xtables_target
*
476 find_target(struct fw3_ipt_rule
*r
, const char *name
)
478 struct xtables_target
*t
;
480 if (is_chain(r
->h
, name
))
481 return xtables_find_target(XT_STANDARD_TARGET
, XTF_LOAD_MUST_SUCCEED
);
483 t
= xtables_find_target(name
, XTF_DONT_LOAD
);
485 if (!t
&& load_extension(r
->h
, name
))
486 t
= xtables_find_target(name
, XTF_DONT_LOAD
);
491 static struct xtables_target
*
492 get_target(struct fw3_ipt_rule
*r
, const char *name
)
495 struct xtables_target
*t
;
496 struct xtables_globals
*g
;
498 t
= find_target(r
, name
);
503 s
= XT_ALIGN(sizeof(struct xt_entry_target
)) + t
->size
;
506 fw3_xt_set_target_name(t
, name
);
508 t
->t
->u
.user
.revision
= t
->revision
;
509 t
->t
->u
.target_size
= s
;
511 /* free previous userspace data */
512 fw3_xt_free_target_udata(t
);
517 /* merge option table */
518 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
519 fw3_xt_merge_target_options(g
, t
);
527 fw3_ipt_rule_proto(struct fw3_ipt_rule
*r
, struct fw3_protocol
*proto
)
531 if (!proto
|| proto
->any
)
534 pr
= proto
->protocol
;
537 if (r
->h
->family
== FW3_FAMILY_V6
)
542 r
->e6
.ipv6
.proto
= pr
;
543 r
->e6
.ipv6
.flags
|= IP6T_F_PROTO
;
546 r
->e6
.ipv6
.invflags
|= XT_INV_PROTO
;
554 r
->e
.ip
.invflags
|= XT_INV_PROTO
;
561 fw3_ipt_rule_in_out(struct fw3_ipt_rule
*r
,
562 struct fw3_device
*in
, struct fw3_device
*out
)
565 if (r
->h
->family
== FW3_FAMILY_V6
)
569 xtables_parse_interface(in
->name
, r
->e6
.ipv6
.iniface
,
570 r
->e6
.ipv6
.iniface_mask
);
573 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_IN
;
576 if (out
&& !out
->any
)
578 xtables_parse_interface(out
->name
, r
->e6
.ipv6
.outiface
,
579 r
->e6
.ipv6
.outiface_mask
);
582 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_OUT
;
590 xtables_parse_interface(in
->name
, r
->e
.ip
.iniface
,
591 r
->e
.ip
.iniface_mask
);
594 r
->e
.ip
.invflags
|= IPT_INV_VIA_IN
;
597 if (out
&& !out
->any
)
599 xtables_parse_interface(out
->name
, r
->e
.ip
.outiface
,
600 r
->e
.ip
.outiface_mask
);
603 r
->e
.ip
.invflags
|= IPT_INV_VIA_OUT
;
610 ip4prefix2mask(int prefix
, struct in_addr
*mask
)
613 mask
->s_addr
= htonl(~((1 << (32 - prefix
)) - 1));
620 ip6prefix2mask(int prefix
, struct in6_addr
*mask
)
622 char *p
= (char *)mask
;
626 memset(p
, 0xff, prefix
/ 8);
627 memset(p
+ (prefix
/ 8) + 1, 0, (128 - prefix
) / 8);
628 p
[prefix
/ 8] = 0xff << (8 - (prefix
& 7));
632 memset(mask
, 0, sizeof(*mask
));
638 fw3_ipt_rule_src_dest(struct fw3_ipt_rule
*r
,
639 struct fw3_address
*src
, struct fw3_address
*dest
)
641 if ((src
&& src
->range
) || (dest
&& dest
->range
))
643 fw3_ipt_rule_addarg(r
, false, "-m", "iprange");
650 fw3_ipt_rule_addarg(r
, src
->invert
, "--src-range",
651 fw3_address_to_string(src
, false));
654 else if (r
->h
->family
== FW3_FAMILY_V6
)
656 r
->e6
.ipv6
.src
= src
->address
.v6
;
657 ip6prefix2mask(src
->mask
, &r
->e6
.ipv6
.smsk
);
660 for (i
= 0; i
< 4; i
++)
661 r
->e6
.ipv6
.src
.s6_addr32
[i
] &= r
->e6
.ipv6
.smsk
.s6_addr32
[i
];
664 r
->e6
.ipv6
.invflags
|= IP6T_INV_SRCIP
;
669 r
->e
.ip
.src
= src
->address
.v4
;
670 ip4prefix2mask(src
->mask
, &r
->e
.ip
.smsk
);
672 r
->e
.ip
.src
.s_addr
&= r
->e
.ip
.smsk
.s_addr
;
675 r
->e
.ip
.invflags
|= IPT_INV_SRCIP
;
679 if (dest
&& dest
->set
)
683 fw3_ipt_rule_addarg(r
, dest
->invert
, "--dst-range",
684 fw3_address_to_string(dest
, false));
687 else if (r
->h
->family
== FW3_FAMILY_V6
)
689 r
->e6
.ipv6
.dst
= dest
->address
.v6
;
690 ip6prefix2mask(dest
->mask
, &r
->e6
.ipv6
.dmsk
);
693 for (i
= 0; i
< 4; i
++)
694 r
->e6
.ipv6
.dst
.s6_addr32
[i
] &= r
->e6
.ipv6
.dmsk
.s6_addr32
[i
];
697 r
->e6
.ipv6
.invflags
|= IP6T_INV_DSTIP
;
702 r
->e
.ip
.dst
= dest
->address
.v4
;
703 ip4prefix2mask(dest
->mask
, &r
->e
.ip
.dmsk
);
705 r
->e
.ip
.dst
.s_addr
&= r
->e
.ip
.dmsk
.s_addr
;
708 r
->e
.ip
.invflags
|= IPT_INV_DSTIP
;
714 fw3_ipt_rule_sport_dport(struct fw3_ipt_rule
*r
,
715 struct fw3_port
*sp
, struct fw3_port
*dp
)
717 char buf
[sizeof("65535:65535\0")];
719 if ((!sp
|| !sp
->set
) && (!dp
|| !dp
->set
))
722 if (!get_protoname(r
))
727 if (sp
->port_min
== sp
->port_max
)
728 sprintf(buf
, "%u", sp
->port_min
);
730 sprintf(buf
, "%u:%u", sp
->port_min
, sp
->port_max
);
732 fw3_ipt_rule_addarg(r
, sp
->invert
, "--sport", buf
);
737 if (dp
->port_min
== dp
->port_max
)
738 sprintf(buf
, "%u", dp
->port_min
);
740 sprintf(buf
, "%u:%u", dp
->port_min
, dp
->port_max
);
742 fw3_ipt_rule_addarg(r
, dp
->invert
, "--dport", buf
);
747 fw3_ipt_rule_mac(struct fw3_ipt_rule
*r
, struct fw3_mac
*mac
)
749 char buf
[sizeof("ff:ff:ff:ff:ff:ff\0")];
750 uint8_t *addr
= mac
->mac
.ether_addr_octet
;
755 sprintf(buf
, "%02x:%02x:%02x:%02x:%02x:%02x",
756 addr
[0], addr
[1], addr
[2], addr
[3], addr
[4], addr
[5]);
758 fw3_ipt_rule_addarg(r
, false, "-m", "mac");
759 fw3_ipt_rule_addarg(r
, mac
->invert
, "--mac-source", buf
);
763 fw3_ipt_rule_icmptype(struct fw3_ipt_rule
*r
, struct fw3_icmptype
*icmp
)
765 char buf
[sizeof("255/255\0")];
771 if (r
->h
->family
== FW3_FAMILY_V6
)
773 if (icmp
->code6_min
== 0 && icmp
->code6_max
== 0xFF)
774 sprintf(buf
, "%u", icmp
->type6
);
776 sprintf(buf
, "%u/%u", icmp
->type6
, icmp
->code6_min
);
778 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmpv6-type", buf
);
783 if (icmp
->code_min
== 0 && icmp
->code_max
== 0xFF)
784 sprintf(buf
, "%u", icmp
->type
);
786 sprintf(buf
, "%u/%u", icmp
->type
, icmp
->code_min
);
788 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmp-type", buf
);
793 fw3_ipt_rule_limit(struct fw3_ipt_rule
*r
, struct fw3_limit
*limit
)
795 char buf
[sizeof("-4294967296/second\0")];
797 if (!limit
|| limit
->rate
<= 0)
800 fw3_ipt_rule_addarg(r
, false, "-m", "limit");
802 sprintf(buf
, "%u/%s", limit
->rate
, fw3_limit_units
[limit
->unit
]);
803 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit", buf
);
805 if (limit
->burst
> 0)
807 sprintf(buf
, "%u", limit
->burst
);
808 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit-burst", buf
);
813 fw3_ipt_rule_ipset(struct fw3_ipt_rule
*r
, struct fw3_setmatch
*match
)
815 char buf
[sizeof("dst,dst,dst\0")];
819 struct fw3_ipset
*set
;
820 struct fw3_ipset_datatype
*type
;
822 if (!match
|| !match
->set
|| !match
->ptr
)
826 list_for_each_entry(type
, &set
->datatypes
, list
)
834 p
+= sprintf(p
, "%s", match
->dir
[i
] ? match
->dir
[i
] : type
->dir
);
838 fw3_ipt_rule_addarg(r
, false, "-m", "set");
840 fw3_ipt_rule_addarg(r
, match
->invert
, "--match-set",
841 set
->external
? set
->external
: set
->name
);
843 fw3_ipt_rule_addarg(r
, false, buf
, NULL
);
847 fw3_ipt_rule_time(struct fw3_ipt_rule
*r
, struct fw3_time
*time
)
850 struct tm empty
= { 0 };
852 char buf
[84]; /* sizeof("1,2,3,...,30,31\0") */
855 bool d1
= memcmp(&time
->datestart
, &empty
, sizeof(empty
));
856 bool d2
= memcmp(&time
->datestop
, &empty
, sizeof(empty
));
858 if (!d1
&& !d2
&& !time
->timestart
&& !time
->timestop
&&
859 !(time
->monthdays
& 0xFFFFFFFE) && !(time
->weekdays
& 0xFE))
864 fw3_ipt_rule_addarg(r
, false, "-m", "time");
867 fw3_ipt_rule_addarg(r
, false, "--utc", NULL
);
871 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestart
);
872 fw3_ipt_rule_addarg(r
, false, "--datestart", buf
);
877 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestop
);
878 fw3_ipt_rule_addarg(r
, false, "--datestop", buf
);
883 sprintf(buf
, "%02d:%02d:%02d",
884 time
->timestart
/ 3600,
885 time
->timestart
% 3600 / 60,
886 time
->timestart
% 60);
888 fw3_ipt_rule_addarg(r
, false, "--timestart", buf
);
893 sprintf(buf
, "%02d:%02d:%02d",
894 time
->timestop
/ 3600,
895 time
->timestop
% 3600 / 60,
896 time
->timestop
% 60);
898 fw3_ipt_rule_addarg(r
, false, "--timestop", buf
);
901 if (time
->monthdays
& 0xFFFFFFFE)
903 for (i
= 1, p
= buf
; i
< 32; i
++)
905 if (hasbit(time
->monthdays
, i
))
910 p
+= sprintf(p
, "%u", i
);
914 fw3_ipt_rule_addarg(r
, hasbit(time
->monthdays
, 0), "--monthdays", buf
);
917 if (time
->weekdays
& 0xFE)
919 for (i
= 1, p
= buf
; i
< 8; i
++)
921 if (hasbit(time
->weekdays
, i
))
926 p
+= sprintf(p
, "%u", i
);
930 fw3_ipt_rule_addarg(r
, hasbit(time
->weekdays
, 0), "--weekdays", buf
);
935 fw3_ipt_rule_mark(struct fw3_ipt_rule
*r
, struct fw3_mark
*mark
)
937 char buf
[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
939 if (!mark
|| !mark
->set
)
942 if (mark
->mask
< 0xFFFFFFFF)
943 sprintf(buf
, "0x%x/0x%x", mark
->mark
, mark
->mask
);
945 sprintf(buf
, "0x%x", mark
->mark
);
947 fw3_ipt_rule_addarg(r
, false, "-m", "mark");
948 fw3_ipt_rule_addarg(r
, mark
->invert
, "--mark", buf
);
952 fw3_ipt_rule_comment(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
961 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
964 fw3_ipt_rule_addarg(r
, false, "-m", "comment");
965 fw3_ipt_rule_addarg(r
, false, "--comment", buf
);
969 fw3_ipt_rule_extra(struct fw3_ipt_rule
*r
, const char *extra
)
973 if (!extra
|| !*extra
)
976 s
= fw3_strdup(extra
);
978 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
980 tmp
= realloc(r
->argv
, (r
->argc
+ 1) * sizeof(*r
->argv
));
986 r
->argv
[r
->argc
++] = fw3_strdup(p
);
994 rule_print6(struct ip6t_entry
*e
)
996 char buf
[INET6_ADDRSTRLEN
];
999 if (e
->ipv6
.flags
& IP6T_F_PROTO
)
1001 if (e
->ipv6
.flags
& XT_INV_PROTO
)
1004 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e6
));
1007 printf(" -p %s", pname
);
1009 printf(" -p %u", e
->ipv6
.proto
);
1012 if (e
->ipv6
.iniface
[0])
1014 if (e
->ipv6
.flags
& IP6T_INV_VIA_IN
)
1017 printf(" -i %s", e
->ipv6
.iniface
);
1020 if (e
->ipv6
.outiface
[0])
1022 if (e
->ipv6
.flags
& IP6T_INV_VIA_OUT
)
1025 printf(" -o %s", e
->ipv6
.outiface
);
1028 if (memcmp(&e
->ipv6
.src
, &in6addr_any
, sizeof(struct in6_addr
)))
1030 if (e
->ipv6
.flags
& IP6T_INV_SRCIP
)
1033 printf(" -s %s/%u", inet_ntop(AF_INET6
, &e
->ipv6
.src
, buf
, sizeof(buf
)),
1034 xtables_ip6mask_to_cidr(&e
->ipv6
.smsk
));
1037 if (memcmp(&e
->ipv6
.dst
, &in6addr_any
, sizeof(struct in6_addr
)))
1039 if (e
->ipv6
.flags
& IP6T_INV_DSTIP
)
1042 printf(" -d %s/%u", inet_ntop(AF_INET6
, &e
->ipv6
.dst
, buf
, sizeof(buf
)),
1043 xtables_ip6mask_to_cidr(&e
->ipv6
.dmsk
));
1049 rule_print4(struct ipt_entry
*e
)
1051 struct in_addr in_zero
= { 0 };
1052 char buf
[sizeof("255.255.255.255\0")];
1057 if (e
->ip
.flags
& XT_INV_PROTO
)
1060 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e
));
1063 printf(" -p %s", pname
);
1065 printf(" -p %u", e
->ip
.proto
);
1068 if (e
->ip
.iniface
[0])
1070 if (e
->ip
.flags
& IPT_INV_VIA_IN
)
1073 printf(" -i %s", e
->ip
.iniface
);
1076 if (e
->ip
.outiface
[0])
1078 if (e
->ip
.flags
& IPT_INV_VIA_OUT
)
1081 printf(" -o %s", e
->ip
.outiface
);
1084 if (memcmp(&e
->ip
.src
, &in_zero
, sizeof(struct in_addr
)))
1086 if (e
->ip
.flags
& IPT_INV_SRCIP
)
1089 printf(" -s %s/%u", inet_ntop(AF_INET
, &e
->ip
.src
, buf
, sizeof(buf
)),
1090 xtables_ipmask_to_cidr(&e
->ip
.smsk
));
1093 if (memcmp(&e
->ip
.dst
, &in_zero
, sizeof(struct in_addr
)))
1095 if (e
->ip
.flags
& IPT_INV_DSTIP
)
1098 printf(" -d %s/%u", inet_ntop(AF_INET
, &e
->ip
.dst
, buf
, sizeof(buf
)),
1099 xtables_ipmask_to_cidr(&e
->ip
.dmsk
));
1104 rule_print(struct fw3_ipt_rule
*r
, const char *prefix
, const char *chain
)
1106 debug(r
->h
, "%s %s", prefix
, chain
);
1108 #ifndef DISABLE_IPV6
1109 if (r
->h
->family
== FW3_FAMILY_V6
)
1110 rule_print6(&r
->e6
);
1115 fw3_xt_print_matches(&r
->e
.ip
, r
->matches
);
1116 fw3_xt_print_target(&r
->e
.ip
, r
->target
);
1122 parse_option(struct fw3_ipt_rule
*r
, int optc
, bool inv
)
1124 struct xtables_rule_match
*m
;
1125 struct xtables_match
*em
;
1127 /* is a target option */
1128 if (r
->target
&& fw3_xt_has_target_parse(r
->target
) &&
1129 optc
>= r
->target
->option_offset
&&
1130 optc
< (r
->target
->option_offset
+ 256))
1132 xtables_option_tpcall(optc
, r
->argv
, inv
, r
->target
, &r
->e
);
1136 /* try to dispatch argument to one of the match parsers */
1137 for (m
= r
->matches
; m
; m
= m
->next
)
1141 if (m
->completed
|| !fw3_xt_has_match_parse(em
))
1144 if (optc
< em
->option_offset
||
1145 optc
>= (em
->option_offset
+ 256))
1148 xtables_option_mpcall(optc
, r
->argv
, inv
, em
, &r
->e
);
1152 /* unhandled option, might belong to a protocol match */
1153 if ((em
= load_protomatch(r
)) != NULL
)
1155 init_match(r
, em
, false);
1157 r
->protocol_loaded
= true;
1164 warn("parse_option(): option '%s' needs argument", r
->argv
[optind
-1]);
1167 warn("parse_option(): unknown option '%s'", r
->argv
[optind
-1]);
1173 fw3_ipt_rule_addarg(struct fw3_ipt_rule
*r
, bool inv
,
1174 const char *k
, const char *v
)
1182 n
= inv
+ !!k
+ !!v
;
1183 tmp
= realloc(r
->argv
, (r
->argc
+ n
) * sizeof(*tmp
));
1191 r
->argv
[r
->argc
++] = fw3_strdup("!");
1193 r
->argv
[r
->argc
++] = fw3_strdup(k
);
1196 r
->argv
[r
->argc
++] = fw3_strdup(v
);
1199 static unsigned char *
1200 rule_mask(struct fw3_ipt_rule
*r
)
1203 unsigned char *p
, *mask
= NULL
;
1204 struct xtables_rule_match
*m
;
1206 #define SZ(x) XT_ALIGN(sizeof(struct x))
1208 #ifndef DISABLE_IPV6
1209 if (r
->h
->family
== FW3_FAMILY_V6
)
1213 for (m
= r
->matches
; m
; m
= m
->next
)
1214 s
+= SZ(ip6t_entry_match
) + m
->match
->size
;
1216 s
+= SZ(ip6t_entry_target
) + r
->target
->size
;
1218 mask
= fw3_alloc(s
);
1219 memset(mask
, 0xFF, SZ(ip6t_entry
));
1220 p
= mask
+ SZ(ip6t_entry
);
1222 for (m
= r
->matches
; m
; m
= m
->next
)
1224 memset(p
, 0xFF, SZ(ip6t_entry_match
) + m
->match
->userspacesize
);
1225 p
+= SZ(ip6t_entry_match
) + m
->match
->size
;
1228 memset(p
, 0xFF, SZ(ip6t_entry_target
) + r
->target
->userspacesize
);
1235 for (m
= r
->matches
; m
; m
= m
->next
)
1236 s
+= SZ(ipt_entry_match
) + m
->match
->size
;
1238 s
+= SZ(ipt_entry_target
) + r
->target
->size
;
1240 mask
= fw3_alloc(s
);
1241 memset(mask
, 0xFF, SZ(ipt_entry
));
1242 p
= mask
+ SZ(ipt_entry
);
1244 for (m
= r
->matches
; m
; m
= m
->next
)
1246 memset(p
, 0xFF, SZ(ipt_entry_match
) + m
->match
->userspacesize
);
1247 p
+= SZ(ipt_entry_match
) + m
->match
->size
;
1250 memset(p
, 0xFF, SZ(ipt_entry_target
) + r
->target
->userspacesize
);
1257 rule_build(struct fw3_ipt_rule
*r
)
1260 struct xtables_rule_match
*m
;
1262 #ifndef DISABLE_IPV6
1263 if (r
->h
->family
== FW3_FAMILY_V6
)
1265 struct ip6t_entry
*e6
;
1267 s
= XT_ALIGN(sizeof(struct ip6t_entry
));
1269 for (m
= r
->matches
; m
; m
= m
->next
)
1270 s
+= m
->match
->m
->u
.match_size
;
1272 e6
= fw3_alloc(s
+ r
->target
->t
->u
.target_size
);
1274 memcpy(e6
, &r
->e6
, sizeof(struct ip6t_entry
));
1276 e6
->target_offset
= s
;
1277 e6
->next_offset
= s
+ r
->target
->t
->u
.target_size
;
1281 for (m
= r
->matches
; m
; m
= m
->next
)
1283 memcpy(e6
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1284 s
+= m
->match
->m
->u
.match_size
;
1287 memcpy(e6
->elems
+ s
, r
->target
->t
, r
->target
->t
->u
.target_size
);
1294 struct ipt_entry
*e
;
1296 s
= XT_ALIGN(sizeof(struct ipt_entry
));
1298 for (m
= r
->matches
; m
; m
= m
->next
)
1299 s
+= m
->match
->m
->u
.match_size
;
1301 e
= fw3_alloc(s
+ r
->target
->t
->u
.target_size
);
1303 memcpy(e
, &r
->e
, sizeof(struct ipt_entry
));
1305 e
->target_offset
= s
;
1306 e
->next_offset
= s
+ r
->target
->t
->u
.target_size
;
1310 for (m
= r
->matches
; m
; m
= m
->next
)
1312 memcpy(e
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1313 s
+= m
->match
->m
->u
.match_size
;
1316 memcpy(e
->elems
+ s
, r
->target
->t
, r
->target
->t
->u
.target_size
);
1323 __fw3_ipt_rule_append(struct fw3_ipt_rule
*r
, bool repl
, const char *fmt
, ...)
1326 unsigned char *mask
;
1328 struct xtables_rule_match
*m
;
1329 struct xtables_match
*em
;
1330 struct xtables_target
*et
;
1331 struct xtables_globals
*g
;
1339 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
1342 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
1343 g
->opts
= g
->orig_opts
;
1348 while ((optc
= getopt_long(r
->argc
, r
->argv
, "-:m:j:", g
->opts
,
1354 em
= find_match(r
, optarg
);
1358 warn("fw3_ipt_rule_append(): Can't find match '%s'", optarg
);
1362 init_match(r
, em
, true);
1366 et
= get_target(r
, optarg
);
1370 warn("fw3_ipt_rule_append(): Can't find target '%s'", optarg
);
1377 if ((optarg
[0] == '!') && (optarg
[1] == '\0'))
1384 warn("fw3_ipt_rule_append(): Bad argument '%s'", optarg
);
1388 if (parse_option(r
, optc
, inv
))
1396 for (m
= r
->matches
; m
; m
= m
->next
)
1397 xtables_option_mfcall(m
->match
);
1400 xtables_option_tfcall(r
->target
);
1402 rule
= rule_build(r
);
1404 #ifndef DISABLE_IPV6
1405 if (r
->h
->family
== FW3_FAMILY_V6
)
1409 mask
= rule_mask(r
);
1411 while (ip6tc_delete_entry(buf
, rule
, mask
, r
->h
->handle
))
1413 rule_print(r
, "-D", buf
);
1419 rule_print(r
, "-A", buf
);
1421 if (!ip6tc_append_entry(buf
, rule
, r
->h
->handle
))
1422 warn("ip6tc_append_entry(): %s", ip6tc_strerror(errno
));
1429 mask
= rule_mask(r
);
1431 while (iptc_delete_entry(buf
, rule
, mask
, r
->h
->handle
))
1433 rule_print(r
, "-D", buf
);
1439 rule_print(r
, "-A", buf
);
1441 if (!iptc_append_entry(buf
, rule
, r
->h
->handle
))
1442 warn("iptc_append_entry(): %s\n", iptc_strerror(errno
));
1448 for (i
= 1; i
< r
->argc
; i
++)
1453 xtables_rule_matches_free(&r
->matches
);
1460 /* reset all targets and matches */
1461 for (em
= xtables_matches
; em
; em
= em
->next
)
1464 for (et
= xtables_targets
; et
; et
= et
->next
)
1470 xtables_free_opts(1);
1473 struct fw3_ipt_rule
*
1474 fw3_ipt_rule_create(struct fw3_ipt_handle
*handle
, struct fw3_protocol
*proto
,
1475 struct fw3_device
*in
, struct fw3_device
*out
,
1476 struct fw3_address
*src
, struct fw3_address
*dest
)
1478 struct fw3_ipt_rule
*r
;
1480 r
= fw3_ipt_rule_new(handle
);
1482 fw3_ipt_rule_proto(r
, proto
);
1483 fw3_ipt_rule_in_out(r
, in
, out
);
1484 fw3_ipt_rule_src_dest(r
, src
, dest
);