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
));
318 struct fw3_ipt_rule
*
319 fw3_ipt_rule_new(struct fw3_ipt_handle
*h
)
321 struct fw3_ipt_rule
*r
;
323 r
= fw3_alloc(sizeof(*r
));
326 r
->argv
= fw3_alloc(sizeof(char *));
327 r
->argv
[r
->argc
++] = "fw3";
334 is_chain(struct fw3_ipt_handle
*h
, const char *name
)
337 if (h
->family
== FW3_FAMILY_V6
)
338 return ip6tc_is_chain(name
, h
->handle
);
341 return iptc_is_chain(name
, h
->handle
);
345 get_protoname(struct fw3_ipt_rule
*r
)
347 const struct xtables_pprot
*pp
;
350 for (pp
= xtables_chain_protos
; pp
->name
; pp
++)
351 if (pp
->num
== r
->protocol
)
352 return (char *)pp
->name
;
357 static struct xtables_match
*
358 find_match(struct fw3_ipt_rule
*r
, const char *name
)
360 return xtables_find_match(name
, XTF_TRY_LOAD
, &r
->matches
);
364 init_match(struct fw3_ipt_rule
*r
, struct xtables_match
*m
, bool no_clone
)
367 struct xtables_globals
*g
;
372 s
= XT_ALIGN(sizeof(struct xt_entry_match
)) + m
->size
;
376 fw3_xt_set_match_name(m
);
378 m
->m
->u
.user
.revision
= m
->revision
;
379 m
->m
->u
.match_size
= s
;
381 /* free previous userspace data */
382 fw3_xt_free_match_udata(m
);
387 /* don't merge options if no_clone is set and this match is a clone */
388 if (no_clone
&& (m
== m
->next
))
391 /* merge option table */
392 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
393 fw3_xt_merge_match_options(g
, m
);
397 need_protomatch(struct fw3_ipt_rule
*r
, const char *pname
)
402 if (!xtables_find_match(pname
, XTF_DONT_LOAD
, NULL
))
405 return !r
->protocol_loaded
;
408 static struct xtables_match
*
409 load_protomatch(struct fw3_ipt_rule
*r
)
411 const char *pname
= get_protoname(r
);
413 if (!need_protomatch(r
, pname
))
416 return find_match(r
, pname
);
419 static struct xtables_target
*
420 get_target(struct fw3_ipt_rule
*r
, const char *name
)
423 struct xtables_target
*t
;
424 struct xtables_globals
*g
;
426 bool chain
= is_chain(r
->h
, name
);
429 t
= xtables_find_target(XT_STANDARD_TARGET
, XTF_LOAD_MUST_SUCCEED
);
431 t
= xtables_find_target(name
, XTF_TRY_LOAD
);
436 s
= XT_ALIGN(sizeof(struct xt_entry_target
)) + t
->size
;
439 fw3_xt_set_target_name(t
, name
);
441 t
->t
->u
.user
.revision
= t
->revision
;
442 t
->t
->u
.target_size
= s
;
444 /* free previous userspace data */
445 fw3_xt_free_target_udata(t
);
450 /* merge option table */
451 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
452 fw3_xt_merge_target_options(g
, t
);
460 fw3_ipt_rule_proto(struct fw3_ipt_rule
*r
, struct fw3_protocol
*proto
)
464 if (!proto
|| proto
->any
)
467 pr
= proto
->protocol
;
470 if (r
->h
->family
== FW3_FAMILY_V6
)
475 r
->e6
.ipv6
.proto
= pr
;
476 r
->e6
.ipv6
.flags
|= IP6T_F_PROTO
;
479 r
->e6
.ipv6
.invflags
|= XT_INV_PROTO
;
487 r
->e
.ip
.invflags
|= XT_INV_PROTO
;
494 fw3_ipt_rule_in_out(struct fw3_ipt_rule
*r
,
495 struct fw3_device
*in
, struct fw3_device
*out
)
498 if (r
->h
->family
== FW3_FAMILY_V6
)
502 xtables_parse_interface(in
->name
, r
->e6
.ipv6
.iniface
,
503 r
->e6
.ipv6
.iniface_mask
);
506 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_IN
;
509 if (out
&& !out
->any
)
511 xtables_parse_interface(out
->name
, r
->e6
.ipv6
.outiface
,
512 r
->e6
.ipv6
.outiface_mask
);
515 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_OUT
;
523 xtables_parse_interface(in
->name
, r
->e
.ip
.iniface
,
524 r
->e
.ip
.iniface_mask
);
527 r
->e
.ip
.invflags
|= IPT_INV_VIA_IN
;
530 if (out
&& !out
->any
)
532 xtables_parse_interface(out
->name
, r
->e
.ip
.outiface
,
533 r
->e
.ip
.outiface_mask
);
536 r
->e
.ip
.invflags
|= IPT_INV_VIA_OUT
;
543 ip4prefix2mask(int prefix
, struct in_addr
*mask
)
545 mask
->s_addr
= htonl(~((1 << (32 - prefix
)) - 1));
550 ip6prefix2mask(int prefix
, struct in6_addr
*mask
)
552 char *p
= (char *)mask
;
556 memset(p
, 0xff, prefix
/ 8);
557 memset(p
+ (prefix
/ 8) + 1, 0, (128 - prefix
) / 8);
558 p
[prefix
/ 8] = 0xff << (8 - (prefix
& 7));
562 memset(mask
, 0, sizeof(*mask
));
568 fw3_ipt_rule_src_dest(struct fw3_ipt_rule
*r
,
569 struct fw3_address
*src
, struct fw3_address
*dest
)
571 if ((src
&& src
->range
) || (dest
&& dest
->range
))
573 fw3_ipt_rule_addarg(r
, false, "-m", "iprange");
580 fw3_ipt_rule_addarg(r
, src
->invert
, "--src-range",
581 fw3_address_to_string(src
, false));
584 else if (r
->h
->family
== FW3_FAMILY_V6
)
586 r
->e6
.ipv6
.src
= src
->address
.v6
;
587 ip6prefix2mask(src
->mask
, &r
->e6
.ipv6
.smsk
);
590 for (i
= 0; i
< 4; i
++)
591 r
->e6
.ipv6
.src
.s6_addr32
[i
] &= r
->e6
.ipv6
.smsk
.s6_addr32
[i
];
594 r
->e6
.ipv6
.invflags
|= IP6T_INV_SRCIP
;
599 r
->e
.ip
.src
= src
->address
.v4
;
600 ip4prefix2mask(src
->mask
, &r
->e
.ip
.smsk
);
602 r
->e
.ip
.src
.s_addr
&= r
->e
.ip
.smsk
.s_addr
;
605 r
->e
.ip
.invflags
|= IPT_INV_SRCIP
;
609 if (dest
&& dest
->set
)
613 fw3_ipt_rule_addarg(r
, dest
->invert
, "--dst-range",
614 fw3_address_to_string(dest
, false));
617 else if (r
->h
->family
== FW3_FAMILY_V6
)
619 r
->e6
.ipv6
.dst
= dest
->address
.v6
;
620 ip6prefix2mask(dest
->mask
, &r
->e6
.ipv6
.dmsk
);
623 for (i
= 0; i
< 4; i
++)
624 r
->e6
.ipv6
.dst
.s6_addr32
[i
] &= r
->e6
.ipv6
.dmsk
.s6_addr32
[i
];
627 r
->e6
.ipv6
.invflags
|= IP6T_INV_DSTIP
;
632 r
->e
.ip
.dst
= dest
->address
.v4
;
633 ip4prefix2mask(dest
->mask
, &r
->e
.ip
.dmsk
);
635 r
->e
.ip
.dst
.s_addr
&= r
->e
.ip
.dmsk
.s_addr
;
638 r
->e
.ip
.invflags
|= IPT_INV_DSTIP
;
644 fw3_ipt_rule_sport_dport(struct fw3_ipt_rule
*r
,
645 struct fw3_port
*sp
, struct fw3_port
*dp
)
647 char buf
[sizeof("65535:65535\0")];
649 if ((!sp
|| !sp
->set
) && (!dp
|| !dp
->set
))
652 if (!get_protoname(r
))
657 if (sp
->port_min
== sp
->port_max
)
658 sprintf(buf
, "%u", sp
->port_min
);
660 sprintf(buf
, "%u:%u", sp
->port_min
, sp
->port_max
);
662 fw3_ipt_rule_addarg(r
, sp
->invert
, "--sport", buf
);
667 if (dp
->port_min
== dp
->port_max
)
668 sprintf(buf
, "%u", dp
->port_min
);
670 sprintf(buf
, "%u:%u", dp
->port_min
, dp
->port_max
);
672 fw3_ipt_rule_addarg(r
, dp
->invert
, "--dport", buf
);
677 fw3_ipt_rule_mac(struct fw3_ipt_rule
*r
, struct fw3_mac
*mac
)
682 fw3_ipt_rule_addarg(r
, false, "-m", "mac");
683 fw3_ipt_rule_addarg(r
, mac
->invert
, "--mac-source", ether_ntoa(&mac
->mac
));
687 fw3_ipt_rule_icmptype(struct fw3_ipt_rule
*r
, struct fw3_icmptype
*icmp
)
689 char buf
[sizeof("255/255\0")];
695 if (r
->h
->family
== FW3_FAMILY_V6
)
697 if (icmp
->code6_min
== 0 && icmp
->code6_max
== 0xFF)
698 sprintf(buf
, "%u", icmp
->type6
);
700 sprintf(buf
, "%u/%u", icmp
->type6
, icmp
->code6_min
);
702 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmpv6-type", buf
);
707 if (icmp
->code_min
== 0 && icmp
->code_max
== 0xFF)
708 sprintf(buf
, "%u", icmp
->type
);
710 sprintf(buf
, "%u/%u", icmp
->type
, icmp
->code_min
);
712 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmp-type", buf
);
717 fw3_ipt_rule_limit(struct fw3_ipt_rule
*r
, struct fw3_limit
*limit
)
719 char buf
[sizeof("-4294967296/second\0")];
721 if (!limit
|| limit
->rate
<= 0)
724 fw3_ipt_rule_addarg(r
, false, "-m", "limit");
726 sprintf(buf
, "%u/%s", limit
->rate
, fw3_limit_units
[limit
->unit
]);
727 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit", buf
);
729 if (limit
->burst
> 0)
731 sprintf(buf
, "%u", limit
->burst
);
732 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit-burst", buf
);
737 fw3_ipt_rule_ipset(struct fw3_ipt_rule
*r
, struct fw3_ipset
*ipset
,
740 char buf
[sizeof("dst,dst,dst\0")];
743 struct fw3_ipset_datatype
*type
;
748 list_for_each_entry(type
, &ipset
->datatypes
, list
)
753 p
+= sprintf(p
, "%s", type
->dest
? "dst" : "src");
756 fw3_ipt_rule_addarg(r
, false, "-m", "set");
758 fw3_ipt_rule_addarg(r
, invert
, "--match-set",
759 ipset
->external
? ipset
->external
: ipset
->name
);
761 fw3_ipt_rule_addarg(r
, false, buf
, NULL
);
765 fw3_ipt_rule_time(struct fw3_ipt_rule
*r
, struct fw3_time
*time
)
768 struct tm empty
= { 0 };
770 char buf
[84]; /* sizeof("1,2,3,...,30,31\0") */
773 bool d1
= memcmp(&time
->datestart
, &empty
, sizeof(empty
));
774 bool d2
= memcmp(&time
->datestop
, &empty
, sizeof(empty
));
776 if (!d1
&& !d2
&& !time
->timestart
&& !time
->timestop
&&
777 !(time
->monthdays
& 0xFFFFFFFE) && !(time
->weekdays
& 0xFE))
782 fw3_ipt_rule_addarg(r
, false, "-m", "time");
785 fw3_ipt_rule_addarg(r
, false, "--utc", NULL
);
789 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestart
);
790 fw3_ipt_rule_addarg(r
, false, "--datestart", buf
);
795 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestop
);
796 fw3_ipt_rule_addarg(r
, false, "--datestop", buf
);
801 sprintf(buf
, "%02d:%02d:%02d",
802 time
->timestart
/ 3600,
803 time
->timestart
% 3600 / 60,
804 time
->timestart
% 60);
806 fw3_ipt_rule_addarg(r
, false, "--timestart", buf
);
811 sprintf(buf
, "%02d:%02d:%02d",
812 time
->timestop
/ 3600,
813 time
->timestop
% 3600 / 60,
814 time
->timestop
% 60);
816 fw3_ipt_rule_addarg(r
, false, "--timestop", buf
);
819 if (time
->monthdays
& 0xFFFFFFFE)
821 for (i
= 1, p
= buf
; i
< 32; i
++)
823 if (hasbit(time
->monthdays
, i
))
828 p
+= sprintf(p
, "%u", i
);
832 fw3_ipt_rule_addarg(r
, hasbit(time
->monthdays
, 0), "--monthdays", buf
);
835 if (time
->weekdays
& 0xFE)
837 for (i
= 1, p
= buf
; i
< 8; i
++)
839 if (hasbit(time
->weekdays
, i
))
844 p
+= sprintf(p
, "%u", i
);
848 fw3_ipt_rule_addarg(r
, hasbit(time
->weekdays
, 0), "--weekdays", buf
);
853 fw3_ipt_rule_mark(struct fw3_ipt_rule
*r
, struct fw3_mark
*mark
)
855 char buf
[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
857 if (!mark
|| !mark
->set
)
860 if (mark
->mask
< 0xFFFFFFFF)
861 sprintf(buf
, "0x%x/0x%x", mark
->mark
, mark
->mask
);
863 sprintf(buf
, "0x%x", mark
->mark
);
865 fw3_ipt_rule_addarg(r
, false, "-m", "mark");
866 fw3_ipt_rule_addarg(r
, mark
->invert
, "--mark", buf
);
870 fw3_ipt_rule_comment(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
879 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
882 fw3_ipt_rule_addarg(r
, false, "-m", "comment");
883 fw3_ipt_rule_addarg(r
, false, "--comment", buf
);
887 fw3_ipt_rule_extra(struct fw3_ipt_rule
*r
, const char *extra
)
891 if (!extra
|| !*extra
)
894 s
= fw3_strdup(extra
);
896 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
898 tmp
= realloc(r
->argv
, (r
->argc
+ 1) * sizeof(*r
->argv
));
904 r
->argv
[r
->argc
++] = fw3_strdup(p
);
912 rule_print6(struct ip6t_entry
*e
)
914 char buf
[INET6_ADDRSTRLEN
];
917 if (e
->ipv6
.flags
& IP6T_F_PROTO
)
919 if (e
->ipv6
.flags
& XT_INV_PROTO
)
922 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e6
));
925 printf(" -p %s", pname
);
927 printf(" -p %u", e
->ipv6
.proto
);
930 if (e
->ipv6
.iniface
[0])
932 if (e
->ipv6
.flags
& IP6T_INV_VIA_IN
)
935 printf(" -i %s", e
->ipv6
.iniface
);
938 if (e
->ipv6
.outiface
[0])
940 if (e
->ipv6
.flags
& IP6T_INV_VIA_OUT
)
943 printf(" -o %s", e
->ipv6
.outiface
);
946 if (memcmp(&e
->ipv6
.src
, &in6addr_any
, sizeof(struct in6_addr
)))
948 if (e
->ipv6
.flags
& IP6T_INV_SRCIP
)
951 printf(" -s %s/%u", inet_ntop(AF_INET6
, &e
->ipv6
.src
, buf
, sizeof(buf
)),
952 xtables_ip6mask_to_cidr(&e
->ipv6
.smsk
));
955 if (memcmp(&e
->ipv6
.dst
, &in6addr_any
, sizeof(struct in6_addr
)))
957 if (e
->ipv6
.flags
& IP6T_INV_DSTIP
)
960 printf(" -d %s/%u", inet_ntop(AF_INET6
, &e
->ipv6
.dst
, buf
, sizeof(buf
)),
961 xtables_ip6mask_to_cidr(&e
->ipv6
.dmsk
));
967 rule_print4(struct ipt_entry
*e
)
969 struct in_addr in_zero
= { 0 };
970 char buf
[sizeof("255.255.255.255\0")];
975 if (e
->ip
.flags
& XT_INV_PROTO
)
978 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e
));
981 printf(" -p %s", pname
);
983 printf(" -p %u", e
->ip
.proto
);
986 if (e
->ip
.iniface
[0])
988 if (e
->ip
.flags
& IPT_INV_VIA_IN
)
991 printf(" -i %s", e
->ip
.iniface
);
994 if (e
->ip
.outiface
[0])
996 if (e
->ip
.flags
& IPT_INV_VIA_OUT
)
999 printf(" -o %s", e
->ip
.outiface
);
1002 if (memcmp(&e
->ip
.src
, &in_zero
, sizeof(struct in_addr
)))
1004 if (e
->ip
.flags
& IPT_INV_SRCIP
)
1007 printf(" -s %s/%u", inet_ntop(AF_INET
, &e
->ip
.src
, buf
, sizeof(buf
)),
1008 xtables_ipmask_to_cidr(&e
->ip
.smsk
));
1011 if (memcmp(&e
->ip
.dst
, &in_zero
, sizeof(struct in_addr
)))
1013 if (e
->ip
.flags
& IPT_INV_DSTIP
)
1016 printf(" -d %s/%u", inet_ntop(AF_INET
, &e
->ip
.dst
, buf
, sizeof(buf
)),
1017 xtables_ipmask_to_cidr(&e
->ip
.dmsk
));
1022 rule_print(struct fw3_ipt_rule
*r
, const char *chain
)
1024 struct xtables_rule_match
*rm
;
1025 struct xtables_match
*m
;
1026 struct xtables_target
*t
;
1028 debug(r
->h
, "-A %s", chain
);
1030 #ifndef DISABLE_IPV6
1031 if (r
->h
->family
== FW3_FAMILY_V6
)
1032 rule_print6(&r
->e6
);
1037 for (rm
= r
->matches
; rm
; rm
= rm
->next
)
1040 printf(" -m %s", fw3_xt_get_match_name(m
));
1043 m
->save(&r
->e
.ip
, m
->m
);
1049 printf(" -j %s", fw3_xt_get_target_name(t
));
1052 t
->save(&r
->e
.ip
, t
->t
);
1059 parse_option(struct fw3_ipt_rule
*r
, int optc
, bool inv
)
1061 struct xtables_rule_match
*m
;
1062 struct xtables_match
*em
;
1064 /* is a target option */
1065 if (r
->target
&& fw3_xt_has_target_parse(r
->target
) &&
1066 optc
>= r
->target
->option_offset
&&
1067 optc
< (r
->target
->option_offset
+ 256))
1069 xtables_option_tpcall(optc
, r
->argv
, inv
, r
->target
, &r
->e
);
1073 /* try to dispatch argument to one of the match parsers */
1074 for (m
= r
->matches
; m
; m
= m
->next
)
1078 if (m
->completed
|| !fw3_xt_has_match_parse(em
))
1081 if (optc
< em
->option_offset
||
1082 optc
>= (em
->option_offset
+ 256))
1085 xtables_option_mpcall(optc
, r
->argv
, inv
, em
, &r
->e
);
1089 /* unhandled option, might belong to a protocol match */
1090 if ((em
= load_protomatch(r
)) != NULL
)
1092 init_match(r
, em
, false);
1094 r
->protocol_loaded
= true;
1101 fprintf(stderr
, "parse_option(): option '%s' needs argument\n",
1105 fprintf(stderr
, "parse_option(): unknown option '%s'\n",
1112 fw3_ipt_rule_addarg(struct fw3_ipt_rule
*r
, bool inv
,
1113 const char *k
, const char *v
)
1121 n
= inv
+ !!k
+ !!v
;
1122 tmp
= realloc(r
->argv
, (r
->argc
+ n
) * sizeof(*tmp
));
1130 r
->argv
[r
->argc
++] = fw3_strdup("!");
1132 r
->argv
[r
->argc
++] = fw3_strdup(k
);
1135 r
->argv
[r
->argc
++] = fw3_strdup(v
);
1139 fw3_ipt_rule_append(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
1142 struct xtables_rule_match
*m
;
1143 struct xtables_match
*em
;
1144 struct xtables_target
*et
;
1145 struct xtables_globals
*g
;
1146 struct ipt_entry
*e
;
1154 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
1157 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
1158 g
->opts
= g
->orig_opts
;
1163 while ((optc
= getopt_long(r
->argc
, r
->argv
, "m:j:", g
->opts
, NULL
)) != -1)
1168 em
= find_match(r
, optarg
);
1172 fprintf(stderr
, "fw3_ipt_rule_append(): Can't find match '%s'\n", optarg
);
1176 init_match(r
, em
, true);
1180 et
= get_target(r
, optarg
);
1184 fprintf(stderr
, "fw3_ipt_rule_append(): Can't find target '%s'\n", optarg
);
1191 if ((optarg
[0] == '!') && (optarg
[1] == '\0'))
1197 fprintf(stderr
, "fw3_ipt_rule_append(): Bad argument '%s'\n", optarg
);
1201 if (parse_option(r
, optc
, inv
))
1209 for (m
= r
->matches
; m
; m
= m
->next
)
1210 xtables_option_mfcall(m
->match
);
1213 xtables_option_tfcall(r
->target
);
1218 #ifndef DISABLE_IPV6
1219 if (r
->h
->family
== FW3_FAMILY_V6
)
1221 struct ip6t_entry
*e6
;
1223 s
= XT_ALIGN(sizeof(struct ip6t_entry
));
1225 for (m
= r
->matches
; m
; m
= m
->next
)
1226 s
+= m
->match
->m
->u
.match_size
;
1228 e6
= fw3_alloc(s
+ r
->target
->t
->u
.target_size
);
1230 memcpy(e6
, &r
->e6
, sizeof(struct ip6t_entry
));
1232 e6
->target_offset
= s
;
1233 e6
->next_offset
= s
+ r
->target
->t
->u
.target_size
;
1237 for (m
= r
->matches
; m
; m
= m
->next
)
1239 memcpy(e6
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1240 s
+= m
->match
->m
->u
.match_size
;
1243 memcpy(e6
->elems
+ s
, r
->target
->t
, r
->target
->t
->u
.target_size
);
1244 ip6tc_append_entry(buf
, e6
, r
->h
->handle
);
1250 s
= XT_ALIGN(sizeof(struct ipt_entry
));
1252 for (m
= r
->matches
; m
; m
= m
->next
)
1253 s
+= m
->match
->m
->u
.match_size
;
1255 e
= fw3_alloc(s
+ r
->target
->t
->u
.target_size
);
1257 memcpy(e
, &r
->e
, sizeof(struct ipt_entry
));
1259 e
->target_offset
= s
;
1260 e
->next_offset
= s
+ r
->target
->t
->u
.target_size
;
1264 for (m
= r
->matches
; m
; m
= m
->next
)
1266 memcpy(e
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1267 s
+= m
->match
->m
->u
.match_size
;
1270 memcpy(e
->elems
+ s
, r
->target
->t
, r
->target
->t
->u
.target_size
);
1272 if (!iptc_append_entry(buf
, e
, r
->h
->handle
))
1273 fprintf(stderr
, "iptc_append_entry(): %s\n", iptc_strerror(errno
));
1279 for (i
= 1; i
< r
->argc
; i
++)
1284 xtables_rule_matches_free(&r
->matches
);
1291 /* reset all targets and matches */
1292 for (em
= xtables_matches
; em
; em
= em
->next
)
1295 for (et
= xtables_targets
; et
; et
= et
->next
)
1301 xtables_free_opts(1);
1304 struct fw3_ipt_rule
*
1305 fw3_ipt_rule_create(struct fw3_ipt_handle
*handle
, struct fw3_protocol
*proto
,
1306 struct fw3_device
*in
, struct fw3_device
*out
,
1307 struct fw3_address
*src
, struct fw3_address
*dest
)
1309 struct fw3_ipt_rule
*r
;
1311 r
= fw3_ipt_rule_new(handle
);
1313 fw3_ipt_rule_proto(r
, proto
);
1314 fw3_ipt_rule_in_out(r
, in
, out
);
1315 fw3_ipt_rule_src_dest(r
, src
, dest
);