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_flush_chain(struct fw3_ipt_handle
*h
, const char *chain
)
149 debug(h
, "-F %s\n", chain
);
152 if (h
->family
== FW3_FAMILY_V6
)
153 ip6tc_flush_entries(chain
, h
->handle
);
156 iptc_flush_entries(chain
, h
->handle
);
160 delete_rules(struct fw3_ipt_handle
*h
, const char *target
)
163 const struct ipt_entry
*e
;
169 if (h
->family
== FW3_FAMILY_V6
)
171 for (chain
= ip6tc_first_chain(h
->handle
);
173 chain
= ip6tc_next_chain(h
->handle
))
178 const struct ip6t_entry
*e6
;
179 for (num
= 0, e6
= ip6tc_first_rule(chain
, h
->handle
);
181 num
++, e6
= ip6tc_next_rule(e6
, h
->handle
))
183 t
= ip6tc_get_target(e6
, h
->handle
);
185 if (*t
&& !strcmp(t
, target
))
188 debug(h
, "-D %s %u\n", chain
, num
+ 1);
190 ip6tc_delete_num_entry(chain
, num
, h
->handle
);
201 for (chain
= iptc_first_chain(h
->handle
);
203 chain
= iptc_next_chain(h
->handle
))
208 for (num
= 0, e
= iptc_first_rule(chain
, h
->handle
);
210 num
++, e
= iptc_next_rule(e
, h
->handle
))
212 t
= iptc_get_target(e
, h
->handle
);
214 if (*t
&& !strcmp(t
, target
))
217 debug(h
, "-D %s %u\n", chain
, num
+ 1);
219 iptc_delete_num_entry(chain
, num
, h
->handle
);
230 fw3_ipt_delete_chain(struct fw3_ipt_handle
*h
, const char *chain
)
232 delete_rules(h
, chain
);
235 debug(h
, "-X %s\n", chain
);
238 if (h
->family
== FW3_FAMILY_V6
)
239 ip6tc_delete_chain(chain
, h
->handle
);
242 iptc_delete_chain(chain
, h
->handle
);
246 fw3_ipt_create_chain(struct fw3_ipt_handle
*h
, const char *fmt
, ...)
252 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
256 debug(h
, "-N %s\n", buf
);
258 iptc_create_chain(buf
, h
->handle
);
262 fw3_ipt_flush(struct fw3_ipt_handle
*h
)
267 if (h
->family
== FW3_FAMILY_V6
)
269 for (chain
= ip6tc_first_chain(h
->handle
);
271 chain
= ip6tc_next_chain(h
->handle
))
273 ip6tc_flush_entries(chain
, h
->handle
);
276 for (chain
= ip6tc_first_chain(h
->handle
);
278 chain
= ip6tc_next_chain(h
->handle
))
280 ip6tc_delete_chain(chain
, h
->handle
);
286 for (chain
= iptc_first_chain(h
->handle
);
288 chain
= iptc_next_chain(h
->handle
))
290 iptc_flush_entries(chain
, h
->handle
);
293 for (chain
= iptc_first_chain(h
->handle
);
295 chain
= iptc_next_chain(h
->handle
))
297 iptc_delete_chain(chain
, h
->handle
);
303 fw3_ipt_commit(struct fw3_ipt_handle
*h
)
308 if (h
->family
== FW3_FAMILY_V6
)
310 rv
= ip6tc_commit(h
->handle
);
312 warn("ip6tc_commit(): %s", ip6tc_strerror(errno
));
317 rv
= iptc_commit(h
->handle
);
319 warn("iptc_commit(): %s", iptc_strerror(errno
));
324 fw3_ipt_close(struct fw3_ipt_handle
*h
)
331 dlclose(h
->libv
[h
->libc
]);
340 struct fw3_ipt_rule
*
341 fw3_ipt_rule_new(struct fw3_ipt_handle
*h
)
343 struct fw3_ipt_rule
*r
;
345 r
= fw3_alloc(sizeof(*r
));
348 r
->argv
= fw3_alloc(sizeof(char *));
349 r
->argv
[r
->argc
++] = "fw3";
356 is_chain(struct fw3_ipt_handle
*h
, const char *name
)
359 if (h
->family
== FW3_FAMILY_V6
)
360 return ip6tc_is_chain(name
, h
->handle
);
363 return iptc_is_chain(name
, h
->handle
);
367 get_protoname(struct fw3_ipt_rule
*r
)
369 const struct xtables_pprot
*pp
;
372 for (pp
= xtables_chain_protos
; pp
->name
; pp
++)
373 if (pp
->num
== r
->protocol
)
374 return (char *)pp
->name
;
380 load_extension(struct fw3_ipt_handle
*h
, const char *name
)
384 const char *pfx
= (h
->family
== FW3_FAMILY_V6
) ? "libip6t" : "libipt";
386 snprintf(path
, sizeof(path
), "/usr/lib/iptables/libxt_%s.so", name
);
387 if (!(lib
= dlopen(path
, RTLD_NOW
)))
389 snprintf(path
, sizeof(path
), "/usr/lib/iptables/%s_%s.so", pfx
, name
);
390 lib
= dlopen(path
, RTLD_NOW
);
396 tmp
= realloc(h
->libv
, sizeof(lib
) * (h
->libc
+ 1));
402 h
->libv
[h
->libc
++] = lib
;
407 static struct xtables_match
*
408 find_match(struct fw3_ipt_rule
*r
, const char *name
)
410 struct xtables_match
*m
;
412 m
= xtables_find_match(name
, XTF_DONT_LOAD
, &r
->matches
);
414 if (!m
&& load_extension(r
->h
, name
))
415 m
= xtables_find_match(name
, XTF_DONT_LOAD
, &r
->matches
);
421 init_match(struct fw3_ipt_rule
*r
, struct xtables_match
*m
, bool no_clone
)
424 struct xtables_globals
*g
;
429 s
= XT_ALIGN(sizeof(struct xt_entry_match
)) + m
->size
;
433 fw3_xt_set_match_name(m
);
435 m
->m
->u
.user
.revision
= m
->revision
;
436 m
->m
->u
.match_size
= s
;
438 /* free previous userspace data */
439 fw3_xt_free_match_udata(m
);
444 /* don't merge options if no_clone is set and this match is a clone */
445 if (no_clone
&& (m
== m
->next
))
448 /* merge option table */
449 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
450 fw3_xt_merge_match_options(g
, m
);
454 need_protomatch(struct fw3_ipt_rule
*r
, const char *pname
)
459 if (!xtables_find_match(pname
, XTF_DONT_LOAD
, NULL
))
462 return !r
->protocol_loaded
;
465 static struct xtables_match
*
466 load_protomatch(struct fw3_ipt_rule
*r
)
468 const char *pname
= get_protoname(r
);
470 if (!need_protomatch(r
, pname
))
473 return find_match(r
, pname
);
476 static struct xtables_target
*
477 find_target(struct fw3_ipt_rule
*r
, const char *name
)
479 struct xtables_target
*t
;
481 if (is_chain(r
->h
, name
))
482 return xtables_find_target(XT_STANDARD_TARGET
, XTF_LOAD_MUST_SUCCEED
);
484 t
= xtables_find_target(name
, XTF_DONT_LOAD
);
486 if (!t
&& load_extension(r
->h
, name
))
487 t
= xtables_find_target(name
, XTF_DONT_LOAD
);
492 static struct xtables_target
*
493 get_target(struct fw3_ipt_rule
*r
, const char *name
)
496 struct xtables_target
*t
;
497 struct xtables_globals
*g
;
499 t
= find_target(r
, name
);
504 s
= XT_ALIGN(sizeof(struct xt_entry_target
)) + t
->size
;
507 fw3_xt_set_target_name(t
, name
);
509 t
->t
->u
.user
.revision
= t
->revision
;
510 t
->t
->u
.target_size
= s
;
512 /* free previous userspace data */
513 fw3_xt_free_target_udata(t
);
518 /* merge option table */
519 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
520 fw3_xt_merge_target_options(g
, t
);
528 fw3_ipt_rule_proto(struct fw3_ipt_rule
*r
, struct fw3_protocol
*proto
)
532 if (!proto
|| proto
->any
)
535 pr
= proto
->protocol
;
538 if (r
->h
->family
== FW3_FAMILY_V6
)
543 r
->e6
.ipv6
.proto
= pr
;
544 r
->e6
.ipv6
.flags
|= IP6T_F_PROTO
;
547 r
->e6
.ipv6
.invflags
|= XT_INV_PROTO
;
555 r
->e
.ip
.invflags
|= XT_INV_PROTO
;
562 fw3_ipt_rule_in_out(struct fw3_ipt_rule
*r
,
563 struct fw3_device
*in
, struct fw3_device
*out
)
566 if (r
->h
->family
== FW3_FAMILY_V6
)
570 xtables_parse_interface(in
->name
, r
->e6
.ipv6
.iniface
,
571 r
->e6
.ipv6
.iniface_mask
);
574 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_IN
;
577 if (out
&& !out
->any
)
579 xtables_parse_interface(out
->name
, r
->e6
.ipv6
.outiface
,
580 r
->e6
.ipv6
.outiface_mask
);
583 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_OUT
;
591 xtables_parse_interface(in
->name
, r
->e
.ip
.iniface
,
592 r
->e
.ip
.iniface_mask
);
595 r
->e
.ip
.invflags
|= IPT_INV_VIA_IN
;
598 if (out
&& !out
->any
)
600 xtables_parse_interface(out
->name
, r
->e
.ip
.outiface
,
601 r
->e
.ip
.outiface_mask
);
604 r
->e
.ip
.invflags
|= IPT_INV_VIA_OUT
;
611 ip4prefix2mask(int prefix
, struct in_addr
*mask
)
613 mask
->s_addr
= htonl(~((1 << (32 - prefix
)) - 1));
618 ip6prefix2mask(int prefix
, struct in6_addr
*mask
)
620 char *p
= (char *)mask
;
624 memset(p
, 0xff, prefix
/ 8);
625 memset(p
+ (prefix
/ 8) + 1, 0, (128 - prefix
) / 8);
626 p
[prefix
/ 8] = 0xff << (8 - (prefix
& 7));
630 memset(mask
, 0, sizeof(*mask
));
636 fw3_ipt_rule_src_dest(struct fw3_ipt_rule
*r
,
637 struct fw3_address
*src
, struct fw3_address
*dest
)
639 if ((src
&& src
->range
) || (dest
&& dest
->range
))
641 fw3_ipt_rule_addarg(r
, false, "-m", "iprange");
648 fw3_ipt_rule_addarg(r
, src
->invert
, "--src-range",
649 fw3_address_to_string(src
, false));
652 else if (r
->h
->family
== FW3_FAMILY_V6
)
654 r
->e6
.ipv6
.src
= src
->address
.v6
;
655 ip6prefix2mask(src
->mask
, &r
->e6
.ipv6
.smsk
);
658 for (i
= 0; i
< 4; i
++)
659 r
->e6
.ipv6
.src
.s6_addr32
[i
] &= r
->e6
.ipv6
.smsk
.s6_addr32
[i
];
662 r
->e6
.ipv6
.invflags
|= IP6T_INV_SRCIP
;
667 r
->e
.ip
.src
= src
->address
.v4
;
668 ip4prefix2mask(src
->mask
, &r
->e
.ip
.smsk
);
670 r
->e
.ip
.src
.s_addr
&= r
->e
.ip
.smsk
.s_addr
;
673 r
->e
.ip
.invflags
|= IPT_INV_SRCIP
;
677 if (dest
&& dest
->set
)
681 fw3_ipt_rule_addarg(r
, dest
->invert
, "--dst-range",
682 fw3_address_to_string(dest
, false));
685 else if (r
->h
->family
== FW3_FAMILY_V6
)
687 r
->e6
.ipv6
.dst
= dest
->address
.v6
;
688 ip6prefix2mask(dest
->mask
, &r
->e6
.ipv6
.dmsk
);
691 for (i
= 0; i
< 4; i
++)
692 r
->e6
.ipv6
.dst
.s6_addr32
[i
] &= r
->e6
.ipv6
.dmsk
.s6_addr32
[i
];
695 r
->e6
.ipv6
.invflags
|= IP6T_INV_DSTIP
;
700 r
->e
.ip
.dst
= dest
->address
.v4
;
701 ip4prefix2mask(dest
->mask
, &r
->e
.ip
.dmsk
);
703 r
->e
.ip
.dst
.s_addr
&= r
->e
.ip
.dmsk
.s_addr
;
706 r
->e
.ip
.invflags
|= IPT_INV_DSTIP
;
712 fw3_ipt_rule_sport_dport(struct fw3_ipt_rule
*r
,
713 struct fw3_port
*sp
, struct fw3_port
*dp
)
715 char buf
[sizeof("65535:65535\0")];
717 if ((!sp
|| !sp
->set
) && (!dp
|| !dp
->set
))
720 if (!get_protoname(r
))
725 if (sp
->port_min
== sp
->port_max
)
726 sprintf(buf
, "%u", sp
->port_min
);
728 sprintf(buf
, "%u:%u", sp
->port_min
, sp
->port_max
);
730 fw3_ipt_rule_addarg(r
, sp
->invert
, "--sport", buf
);
735 if (dp
->port_min
== dp
->port_max
)
736 sprintf(buf
, "%u", dp
->port_min
);
738 sprintf(buf
, "%u:%u", dp
->port_min
, dp
->port_max
);
740 fw3_ipt_rule_addarg(r
, dp
->invert
, "--dport", buf
);
745 fw3_ipt_rule_mac(struct fw3_ipt_rule
*r
, struct fw3_mac
*mac
)
750 fw3_ipt_rule_addarg(r
, false, "-m", "mac");
751 fw3_ipt_rule_addarg(r
, mac
->invert
, "--mac-source", ether_ntoa(&mac
->mac
));
755 fw3_ipt_rule_icmptype(struct fw3_ipt_rule
*r
, struct fw3_icmptype
*icmp
)
757 char buf
[sizeof("255/255\0")];
763 if (r
->h
->family
== FW3_FAMILY_V6
)
765 if (icmp
->code6_min
== 0 && icmp
->code6_max
== 0xFF)
766 sprintf(buf
, "%u", icmp
->type6
);
768 sprintf(buf
, "%u/%u", icmp
->type6
, icmp
->code6_min
);
770 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmpv6-type", buf
);
775 if (icmp
->code_min
== 0 && icmp
->code_max
== 0xFF)
776 sprintf(buf
, "%u", icmp
->type
);
778 sprintf(buf
, "%u/%u", icmp
->type
, icmp
->code_min
);
780 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmp-type", buf
);
785 fw3_ipt_rule_limit(struct fw3_ipt_rule
*r
, struct fw3_limit
*limit
)
787 char buf
[sizeof("-4294967296/second\0")];
789 if (!limit
|| limit
->rate
<= 0)
792 fw3_ipt_rule_addarg(r
, false, "-m", "limit");
794 sprintf(buf
, "%u/%s", limit
->rate
, fw3_limit_units
[limit
->unit
]);
795 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit", buf
);
797 if (limit
->burst
> 0)
799 sprintf(buf
, "%u", limit
->burst
);
800 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit-burst", buf
);
805 fw3_ipt_rule_ipset(struct fw3_ipt_rule
*r
, struct fw3_setmatch
*match
)
807 char buf
[sizeof("dst,dst,dst\0")];
811 struct fw3_ipset
*set
;
812 struct fw3_ipset_datatype
*type
;
814 if (!match
|| !match
->set
|| !match
->ptr
)
818 list_for_each_entry(type
, &set
->datatypes
, list
)
826 p
+= sprintf(p
, "%s", match
->dir
[i
] ? match
->dir
[i
] : type
->dir
);
830 fw3_ipt_rule_addarg(r
, false, "-m", "set");
832 fw3_ipt_rule_addarg(r
, match
->invert
, "--match-set",
833 set
->external
? set
->external
: set
->name
);
835 fw3_ipt_rule_addarg(r
, false, buf
, NULL
);
839 fw3_ipt_rule_time(struct fw3_ipt_rule
*r
, struct fw3_time
*time
)
842 struct tm empty
= { 0 };
844 char buf
[84]; /* sizeof("1,2,3,...,30,31\0") */
847 bool d1
= memcmp(&time
->datestart
, &empty
, sizeof(empty
));
848 bool d2
= memcmp(&time
->datestop
, &empty
, sizeof(empty
));
850 if (!d1
&& !d2
&& !time
->timestart
&& !time
->timestop
&&
851 !(time
->monthdays
& 0xFFFFFFFE) && !(time
->weekdays
& 0xFE))
856 fw3_ipt_rule_addarg(r
, false, "-m", "time");
859 fw3_ipt_rule_addarg(r
, false, "--utc", NULL
);
863 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestart
);
864 fw3_ipt_rule_addarg(r
, false, "--datestart", buf
);
869 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestop
);
870 fw3_ipt_rule_addarg(r
, false, "--datestop", buf
);
875 sprintf(buf
, "%02d:%02d:%02d",
876 time
->timestart
/ 3600,
877 time
->timestart
% 3600 / 60,
878 time
->timestart
% 60);
880 fw3_ipt_rule_addarg(r
, false, "--timestart", buf
);
885 sprintf(buf
, "%02d:%02d:%02d",
886 time
->timestop
/ 3600,
887 time
->timestop
% 3600 / 60,
888 time
->timestop
% 60);
890 fw3_ipt_rule_addarg(r
, false, "--timestop", buf
);
893 if (time
->monthdays
& 0xFFFFFFFE)
895 for (i
= 1, p
= buf
; i
< 32; i
++)
897 if (hasbit(time
->monthdays
, i
))
902 p
+= sprintf(p
, "%u", i
);
906 fw3_ipt_rule_addarg(r
, hasbit(time
->monthdays
, 0), "--monthdays", buf
);
909 if (time
->weekdays
& 0xFE)
911 for (i
= 1, p
= buf
; i
< 8; i
++)
913 if (hasbit(time
->weekdays
, i
))
918 p
+= sprintf(p
, "%u", i
);
922 fw3_ipt_rule_addarg(r
, hasbit(time
->weekdays
, 0), "--weekdays", buf
);
927 fw3_ipt_rule_mark(struct fw3_ipt_rule
*r
, struct fw3_mark
*mark
)
929 char buf
[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
931 if (!mark
|| !mark
->set
)
934 if (mark
->mask
< 0xFFFFFFFF)
935 sprintf(buf
, "0x%x/0x%x", mark
->mark
, mark
->mask
);
937 sprintf(buf
, "0x%x", mark
->mark
);
939 fw3_ipt_rule_addarg(r
, false, "-m", "mark");
940 fw3_ipt_rule_addarg(r
, mark
->invert
, "--mark", buf
);
944 fw3_ipt_rule_comment(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
953 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
956 fw3_ipt_rule_addarg(r
, false, "-m", "comment");
957 fw3_ipt_rule_addarg(r
, false, "--comment", buf
);
961 fw3_ipt_rule_extra(struct fw3_ipt_rule
*r
, const char *extra
)
965 if (!extra
|| !*extra
)
968 s
= fw3_strdup(extra
);
970 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
972 tmp
= realloc(r
->argv
, (r
->argc
+ 1) * sizeof(*r
->argv
));
978 r
->argv
[r
->argc
++] = fw3_strdup(p
);
986 rule_print6(struct ip6t_entry
*e
)
988 char buf
[INET6_ADDRSTRLEN
];
991 if (e
->ipv6
.flags
& IP6T_F_PROTO
)
993 if (e
->ipv6
.flags
& XT_INV_PROTO
)
996 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e6
));
999 printf(" -p %s", pname
);
1001 printf(" -p %u", e
->ipv6
.proto
);
1004 if (e
->ipv6
.iniface
[0])
1006 if (e
->ipv6
.flags
& IP6T_INV_VIA_IN
)
1009 printf(" -i %s", e
->ipv6
.iniface
);
1012 if (e
->ipv6
.outiface
[0])
1014 if (e
->ipv6
.flags
& IP6T_INV_VIA_OUT
)
1017 printf(" -o %s", e
->ipv6
.outiface
);
1020 if (memcmp(&e
->ipv6
.src
, &in6addr_any
, sizeof(struct in6_addr
)))
1022 if (e
->ipv6
.flags
& IP6T_INV_SRCIP
)
1025 printf(" -s %s/%u", inet_ntop(AF_INET6
, &e
->ipv6
.src
, buf
, sizeof(buf
)),
1026 xtables_ip6mask_to_cidr(&e
->ipv6
.smsk
));
1029 if (memcmp(&e
->ipv6
.dst
, &in6addr_any
, sizeof(struct in6_addr
)))
1031 if (e
->ipv6
.flags
& IP6T_INV_DSTIP
)
1034 printf(" -d %s/%u", inet_ntop(AF_INET6
, &e
->ipv6
.dst
, buf
, sizeof(buf
)),
1035 xtables_ip6mask_to_cidr(&e
->ipv6
.dmsk
));
1041 rule_print4(struct ipt_entry
*e
)
1043 struct in_addr in_zero
= { 0 };
1044 char buf
[sizeof("255.255.255.255\0")];
1049 if (e
->ip
.flags
& XT_INV_PROTO
)
1052 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e
));
1055 printf(" -p %s", pname
);
1057 printf(" -p %u", e
->ip
.proto
);
1060 if (e
->ip
.iniface
[0])
1062 if (e
->ip
.flags
& IPT_INV_VIA_IN
)
1065 printf(" -i %s", e
->ip
.iniface
);
1068 if (e
->ip
.outiface
[0])
1070 if (e
->ip
.flags
& IPT_INV_VIA_OUT
)
1073 printf(" -o %s", e
->ip
.outiface
);
1076 if (memcmp(&e
->ip
.src
, &in_zero
, sizeof(struct in_addr
)))
1078 if (e
->ip
.flags
& IPT_INV_SRCIP
)
1081 printf(" -s %s/%u", inet_ntop(AF_INET
, &e
->ip
.src
, buf
, sizeof(buf
)),
1082 xtables_ipmask_to_cidr(&e
->ip
.smsk
));
1085 if (memcmp(&e
->ip
.dst
, &in_zero
, sizeof(struct in_addr
)))
1087 if (e
->ip
.flags
& IPT_INV_DSTIP
)
1090 printf(" -d %s/%u", inet_ntop(AF_INET
, &e
->ip
.dst
, buf
, sizeof(buf
)),
1091 xtables_ipmask_to_cidr(&e
->ip
.dmsk
));
1096 rule_print(struct fw3_ipt_rule
*r
, const char *prefix
, const char *chain
)
1098 debug(r
->h
, "%s %s", prefix
, chain
);
1100 #ifndef DISABLE_IPV6
1101 if (r
->h
->family
== FW3_FAMILY_V6
)
1102 rule_print6(&r
->e6
);
1107 fw3_xt_print_matches(&r
->e
.ip
, r
->matches
);
1108 fw3_xt_print_target(&r
->e
.ip
, r
->target
);
1114 parse_option(struct fw3_ipt_rule
*r
, int optc
, bool inv
)
1116 struct xtables_rule_match
*m
;
1117 struct xtables_match
*em
;
1119 /* is a target option */
1120 if (r
->target
&& fw3_xt_has_target_parse(r
->target
) &&
1121 optc
>= r
->target
->option_offset
&&
1122 optc
< (r
->target
->option_offset
+ 256))
1124 xtables_option_tpcall(optc
, r
->argv
, inv
, r
->target
, &r
->e
);
1128 /* try to dispatch argument to one of the match parsers */
1129 for (m
= r
->matches
; m
; m
= m
->next
)
1133 if (m
->completed
|| !fw3_xt_has_match_parse(em
))
1136 if (optc
< em
->option_offset
||
1137 optc
>= (em
->option_offset
+ 256))
1140 xtables_option_mpcall(optc
, r
->argv
, inv
, em
, &r
->e
);
1144 /* unhandled option, might belong to a protocol match */
1145 if ((em
= load_protomatch(r
)) != NULL
)
1147 init_match(r
, em
, false);
1149 r
->protocol_loaded
= true;
1156 warn("parse_option(): option '%s' needs argument", r
->argv
[optind
-1]);
1159 warn("parse_option(): unknown option '%s'", r
->argv
[optind
-1]);
1165 fw3_ipt_rule_addarg(struct fw3_ipt_rule
*r
, bool inv
,
1166 const char *k
, const char *v
)
1174 n
= inv
+ !!k
+ !!v
;
1175 tmp
= realloc(r
->argv
, (r
->argc
+ n
) * sizeof(*tmp
));
1183 r
->argv
[r
->argc
++] = fw3_strdup("!");
1185 r
->argv
[r
->argc
++] = fw3_strdup(k
);
1188 r
->argv
[r
->argc
++] = fw3_strdup(v
);
1191 static unsigned char *
1192 rule_mask(struct fw3_ipt_rule
*r
)
1195 unsigned char *p
, *mask
= NULL
;
1196 struct xtables_rule_match
*m
;
1198 #define SZ(x) XT_ALIGN(sizeof(struct x))
1200 #ifndef DISABLE_IPV6
1201 if (r
->h
->family
== FW3_FAMILY_V6
)
1205 for (m
= r
->matches
; m
; m
= m
->next
)
1206 s
+= SZ(ip6t_entry_match
) + m
->match
->size
;
1208 s
+= SZ(ip6t_entry_target
) + r
->target
->size
;
1210 mask
= fw3_alloc(s
);
1211 memset(mask
, 0xFF, SZ(ip6t_entry
));
1212 p
= mask
+ SZ(ip6t_entry
);
1214 for (m
= r
->matches
; m
; m
= m
->next
)
1216 memset(p
, 0xFF, SZ(ip6t_entry_match
) + m
->match
->userspacesize
);
1217 p
+= SZ(ip6t_entry_match
) + m
->match
->size
;
1220 memset(p
, 0xFF, SZ(ip6t_entry_target
) + r
->target
->userspacesize
);
1227 for (m
= r
->matches
; m
; m
= m
->next
)
1228 s
+= SZ(ipt_entry_match
) + m
->match
->size
;
1230 s
+= SZ(ipt_entry_target
) + r
->target
->size
;
1232 mask
= fw3_alloc(s
);
1233 memset(mask
, 0xFF, SZ(ipt_entry
));
1234 p
= mask
+ SZ(ipt_entry
);
1236 for (m
= r
->matches
; m
; m
= m
->next
)
1238 memset(p
, 0xFF, SZ(ipt_entry_match
) + m
->match
->userspacesize
);
1239 p
+= SZ(ipt_entry_match
) + m
->match
->size
;
1242 memset(p
, 0xFF, SZ(ipt_entry_target
) + r
->target
->userspacesize
);
1249 rule_build(struct fw3_ipt_rule
*r
)
1252 struct xtables_rule_match
*m
;
1254 #ifndef DISABLE_IPV6
1255 if (r
->h
->family
== FW3_FAMILY_V6
)
1257 struct ip6t_entry
*e6
;
1259 s
= XT_ALIGN(sizeof(struct ip6t_entry
));
1261 for (m
= r
->matches
; m
; m
= m
->next
)
1262 s
+= m
->match
->m
->u
.match_size
;
1264 e6
= fw3_alloc(s
+ r
->target
->t
->u
.target_size
);
1266 memcpy(e6
, &r
->e6
, sizeof(struct ip6t_entry
));
1268 e6
->target_offset
= s
;
1269 e6
->next_offset
= s
+ r
->target
->t
->u
.target_size
;
1273 for (m
= r
->matches
; m
; m
= m
->next
)
1275 memcpy(e6
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1276 s
+= m
->match
->m
->u
.match_size
;
1279 memcpy(e6
->elems
+ s
, r
->target
->t
, r
->target
->t
->u
.target_size
);
1286 struct ipt_entry
*e
;
1288 s
= XT_ALIGN(sizeof(struct ipt_entry
));
1290 for (m
= r
->matches
; m
; m
= m
->next
)
1291 s
+= m
->match
->m
->u
.match_size
;
1293 e
= fw3_alloc(s
+ r
->target
->t
->u
.target_size
);
1295 memcpy(e
, &r
->e
, sizeof(struct ipt_entry
));
1297 e
->target_offset
= s
;
1298 e
->next_offset
= s
+ r
->target
->t
->u
.target_size
;
1302 for (m
= r
->matches
; m
; m
= m
->next
)
1304 memcpy(e
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1305 s
+= m
->match
->m
->u
.match_size
;
1308 memcpy(e
->elems
+ s
, r
->target
->t
, r
->target
->t
->u
.target_size
);
1315 __fw3_ipt_rule_append(struct fw3_ipt_rule
*r
, bool repl
, const char *fmt
, ...)
1318 unsigned char *mask
;
1320 struct xtables_rule_match
*m
;
1321 struct xtables_match
*em
;
1322 struct xtables_target
*et
;
1323 struct xtables_globals
*g
;
1331 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
1334 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
1335 g
->opts
= g
->orig_opts
;
1340 while ((optc
= getopt_long(r
->argc
, r
->argv
, "m:j:", g
->opts
, NULL
)) != -1)
1345 em
= find_match(r
, optarg
);
1349 warn("fw3_ipt_rule_append(): Can't find match '%s'", optarg
);
1353 init_match(r
, em
, true);
1357 et
= get_target(r
, optarg
);
1361 warn("fw3_ipt_rule_append(): Can't find target '%s'", optarg
);
1368 if ((optarg
[0] == '!') && (optarg
[1] == '\0'))
1374 warn("fw3_ipt_rule_append(): Bad argument '%s'", optarg
);
1378 if (parse_option(r
, optc
, inv
))
1386 for (m
= r
->matches
; m
; m
= m
->next
)
1387 xtables_option_mfcall(m
->match
);
1390 xtables_option_tfcall(r
->target
);
1392 rule
= rule_build(r
);
1394 #ifndef DISABLE_IPV6
1395 if (r
->h
->family
== FW3_FAMILY_V6
)
1399 mask
= rule_mask(r
);
1401 while (ip6tc_delete_entry(buf
, rule
, mask
, r
->h
->handle
))
1403 rule_print(r
, "-D", buf
);
1409 rule_print(r
, "-A", buf
);
1411 if (!ip6tc_append_entry(buf
, rule
, r
->h
->handle
))
1412 warn("ip6tc_append_entry(): %s", ip6tc_strerror(errno
));
1419 mask
= rule_mask(r
);
1421 while (iptc_delete_entry(buf
, rule
, mask
, r
->h
->handle
))
1423 rule_print(r
, "-D", buf
);
1429 rule_print(r
, "-A", buf
);
1431 if (!iptc_append_entry(buf
, rule
, r
->h
->handle
))
1432 warn("iptc_append_entry(): %s\n", iptc_strerror(errno
));
1438 for (i
= 1; i
< r
->argc
; i
++)
1443 xtables_rule_matches_free(&r
->matches
);
1450 /* reset all targets and matches */
1451 for (em
= xtables_matches
; em
; em
= em
->next
)
1454 for (et
= xtables_targets
; et
; et
= et
->next
)
1460 xtables_free_opts(1);
1463 struct fw3_ipt_rule
*
1464 fw3_ipt_rule_create(struct fw3_ipt_handle
*handle
, struct fw3_protocol
*proto
,
1465 struct fw3_device
*in
, struct fw3_device
*out
,
1466 struct fw3_address
*src
, struct fw3_address
*dest
)
1468 struct fw3_ipt_rule
*r
;
1470 r
= fw3_ipt_rule_new(handle
);
1472 fw3_ipt_rule_proto(r
, proto
);
1473 fw3_ipt_rule_in_out(r
, in
, out
);
1474 fw3_ipt_rule_src_dest(r
, src
, dest
);