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
;
56 static void fw3_init_extensions(void)
66 struct fw3_ipt_handle
*
67 fw3_ipt_open(enum fw3_family family
, enum fw3_table table
)
69 struct fw3_ipt_handle
*h
;
71 h
= fw3_alloc(sizeof(*h
));
75 if (family
== FW3_FAMILY_V6
)
78 h
->family
= FW3_FAMILY_V6
;
80 h
->handle
= ip6tc_init(fw3_flag_names
[table
]);
82 xtables_set_params(&xtg6
);
83 xtables_set_nfproto(NFPROTO_IPV6
);
88 h
->family
= FW3_FAMILY_V4
;
90 h
->handle
= iptc_init(fw3_flag_names
[table
]);
92 xtables_set_params(&xtg
);
93 xtables_set_nfproto(NFPROTO_IPV4
);
103 fw3_init_extensions();
109 debug(struct fw3_ipt_handle
*h
, const char *fmt
, ...)
113 printf("%s -t %s ", (h
->family
== FW3_FAMILY_V6
) ? "ip6tables" : "iptables",
114 fw3_flag_names
[h
->table
]);
122 fw3_ipt_set_policy(struct fw3_ipt_handle
*h
, const char *chain
,
123 enum fw3_flag policy
)
126 debug(h
, "-P %s %s\n", chain
, fw3_flag_names
[policy
]);
129 if (h
->family
== FW3_FAMILY_V6
)
130 ip6tc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
133 iptc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
137 fw3_ipt_flush_chain(struct fw3_ipt_handle
*h
, const char *chain
)
140 debug(h
, "-F %s\n", chain
);
143 if (h
->family
== FW3_FAMILY_V6
)
144 ip6tc_flush_entries(chain
, h
->handle
);
147 iptc_flush_entries(chain
, h
->handle
);
151 delete_rules(struct fw3_ipt_handle
*h
, const char *target
)
154 const struct ipt_entry
*e
;
160 if (h
->family
== FW3_FAMILY_V6
)
162 for (chain
= ip6tc_first_chain(h
->handle
);
164 chain
= ip6tc_next_chain(h
->handle
))
169 const struct ip6t_entry
*e6
;
170 for (num
= 0, e6
= ip6tc_first_rule(chain
, h
->handle
);
172 num
++, e6
= ip6tc_next_rule(e6
, h
->handle
))
174 t
= ip6tc_get_target(e6
, h
->handle
);
176 if (*t
&& !strcmp(t
, target
))
179 debug(h
, "-D %s %u\n", chain
, num
+ 1);
181 ip6tc_delete_num_entry(chain
, num
, h
->handle
);
192 for (chain
= iptc_first_chain(h
->handle
);
194 chain
= iptc_next_chain(h
->handle
))
199 for (num
= 0, e
= iptc_first_rule(chain
, h
->handle
);
201 num
++, e
= iptc_next_rule(e
, h
->handle
))
203 t
= iptc_get_target(e
, h
->handle
);
205 if (*t
&& !strcmp(t
, target
))
208 debug(h
, "-D %s %u\n", chain
, num
+ 1);
210 iptc_delete_num_entry(chain
, num
, h
->handle
);
221 fw3_ipt_delete_chain(struct fw3_ipt_handle
*h
, const char *chain
)
223 delete_rules(h
, chain
);
226 debug(h
, "-X %s\n", chain
);
229 if (h
->family
== FW3_FAMILY_V6
)
230 ip6tc_delete_chain(chain
, h
->handle
);
233 iptc_delete_chain(chain
, h
->handle
);
237 fw3_ipt_create_chain(struct fw3_ipt_handle
*h
, const char *fmt
, ...)
243 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
247 debug(h
, "-N %s\n", buf
);
249 iptc_create_chain(buf
, h
->handle
);
253 fw3_ipt_flush(struct fw3_ipt_handle
*h
)
258 if (h
->family
== FW3_FAMILY_V6
)
260 for (chain
= ip6tc_first_chain(h
->handle
);
262 chain
= ip6tc_next_chain(h
->handle
))
264 ip6tc_flush_entries(chain
, h
->handle
);
267 for (chain
= ip6tc_first_chain(h
->handle
);
269 chain
= ip6tc_next_chain(h
->handle
))
271 ip6tc_delete_chain(chain
, h
->handle
);
277 for (chain
= iptc_first_chain(h
->handle
);
279 chain
= iptc_next_chain(h
->handle
))
281 iptc_flush_entries(chain
, h
->handle
);
284 for (chain
= iptc_first_chain(h
->handle
);
286 chain
= iptc_next_chain(h
->handle
))
288 iptc_delete_chain(chain
, h
->handle
);
294 fw3_ipt_commit(struct fw3_ipt_handle
*h
)
299 if (h
->family
== FW3_FAMILY_V6
)
301 rv
= ip6tc_commit(h
->handle
);
303 warn("ip6tc_commit(): %s", ip6tc_strerror(errno
));
308 rv
= iptc_commit(h
->handle
);
310 warn("iptc_commit(): %s", iptc_strerror(errno
));
315 fw3_ipt_close(struct fw3_ipt_handle
*h
)
322 dlclose(h
->libv
[h
->libc
]);
331 struct fw3_ipt_rule
*
332 fw3_ipt_rule_new(struct fw3_ipt_handle
*h
)
334 struct fw3_ipt_rule
*r
;
336 r
= fw3_alloc(sizeof(*r
));
339 r
->argv
= fw3_alloc(sizeof(char *));
340 r
->argv
[r
->argc
++] = "fw3";
347 is_chain(struct fw3_ipt_handle
*h
, const char *name
)
350 if (h
->family
== FW3_FAMILY_V6
)
351 return ip6tc_is_chain(name
, h
->handle
);
354 return iptc_is_chain(name
, h
->handle
);
358 get_protoname(struct fw3_ipt_rule
*r
)
360 const struct xtables_pprot
*pp
;
363 for (pp
= xtables_chain_protos
; pp
->name
; pp
++)
364 if (pp
->num
== r
->protocol
)
365 return (char *)pp
->name
;
371 load_extension(struct fw3_ipt_handle
*h
, const char *name
)
375 const char *pfx
= (h
->family
== FW3_FAMILY_V6
) ? "libip6t" : "libipt";
377 snprintf(path
, sizeof(path
), "/usr/lib/iptables/libxt_%s.so", name
);
378 if (!(lib
= dlopen(path
, RTLD_NOW
)))
380 snprintf(path
, sizeof(path
), "/usr/lib/iptables/%s_%s.so", pfx
, name
);
381 lib
= dlopen(path
, RTLD_NOW
);
387 tmp
= realloc(h
->libv
, sizeof(lib
) * (h
->libc
+ 1));
393 h
->libv
[h
->libc
++] = lib
;
398 static struct xtables_match
*
399 find_match(struct fw3_ipt_rule
*r
, const char *name
)
401 struct xtables_match
*m
;
403 m
= xtables_find_match(name
, XTF_DONT_LOAD
, &r
->matches
);
405 if (!m
&& load_extension(r
->h
, name
))
406 m
= xtables_find_match(name
, XTF_DONT_LOAD
, &r
->matches
);
412 init_match(struct fw3_ipt_rule
*r
, struct xtables_match
*m
, bool no_clone
)
415 struct xtables_globals
*g
;
420 s
= XT_ALIGN(sizeof(struct xt_entry_match
)) + m
->size
;
424 fw3_xt_set_match_name(m
);
426 m
->m
->u
.user
.revision
= m
->revision
;
427 m
->m
->u
.match_size
= s
;
429 /* free previous userspace data */
430 fw3_xt_free_match_udata(m
);
435 /* don't merge options if no_clone is set and this match is a clone */
436 if (no_clone
&& (m
== m
->next
))
439 /* merge option table */
440 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
441 fw3_xt_merge_match_options(g
, m
);
445 need_protomatch(struct fw3_ipt_rule
*r
, const char *pname
)
450 if (!xtables_find_match(pname
, XTF_DONT_LOAD
, NULL
))
453 return !r
->protocol_loaded
;
456 static struct xtables_match
*
457 load_protomatch(struct fw3_ipt_rule
*r
)
459 const char *pname
= get_protoname(r
);
461 if (!need_protomatch(r
, pname
))
464 return find_match(r
, pname
);
467 static struct xtables_target
*
468 find_target(struct fw3_ipt_rule
*r
, const char *name
)
470 struct xtables_target
*t
;
472 if (is_chain(r
->h
, name
))
473 return xtables_find_target(XT_STANDARD_TARGET
, XTF_LOAD_MUST_SUCCEED
);
475 t
= xtables_find_target(name
, XTF_DONT_LOAD
);
477 if (!t
&& load_extension(r
->h
, name
))
478 t
= xtables_find_target(name
, XTF_DONT_LOAD
);
483 static struct xtables_target
*
484 get_target(struct fw3_ipt_rule
*r
, const char *name
)
487 struct xtables_target
*t
;
488 struct xtables_globals
*g
;
490 t
= find_target(r
, name
);
495 s
= XT_ALIGN(sizeof(struct xt_entry_target
)) + t
->size
;
498 fw3_xt_set_target_name(t
, name
);
500 t
->t
->u
.user
.revision
= t
->revision
;
501 t
->t
->u
.target_size
= s
;
503 /* free previous userspace data */
504 fw3_xt_free_target_udata(t
);
509 /* merge option table */
510 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
511 fw3_xt_merge_target_options(g
, t
);
519 fw3_ipt_rule_proto(struct fw3_ipt_rule
*r
, struct fw3_protocol
*proto
)
523 if (!proto
|| proto
->any
)
526 pr
= proto
->protocol
;
529 if (r
->h
->family
== FW3_FAMILY_V6
)
534 r
->e6
.ipv6
.proto
= pr
;
535 r
->e6
.ipv6
.flags
|= IP6T_F_PROTO
;
538 r
->e6
.ipv6
.invflags
|= XT_INV_PROTO
;
546 r
->e
.ip
.invflags
|= XT_INV_PROTO
;
553 fw3_ipt_rule_in_out(struct fw3_ipt_rule
*r
,
554 struct fw3_device
*in
, struct fw3_device
*out
)
557 if (r
->h
->family
== FW3_FAMILY_V6
)
561 xtables_parse_interface(in
->name
, r
->e6
.ipv6
.iniface
,
562 r
->e6
.ipv6
.iniface_mask
);
565 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_IN
;
568 if (out
&& !out
->any
)
570 xtables_parse_interface(out
->name
, r
->e6
.ipv6
.outiface
,
571 r
->e6
.ipv6
.outiface_mask
);
574 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_OUT
;
582 xtables_parse_interface(in
->name
, r
->e
.ip
.iniface
,
583 r
->e
.ip
.iniface_mask
);
586 r
->e
.ip
.invflags
|= IPT_INV_VIA_IN
;
589 if (out
&& !out
->any
)
591 xtables_parse_interface(out
->name
, r
->e
.ip
.outiface
,
592 r
->e
.ip
.outiface_mask
);
595 r
->e
.ip
.invflags
|= IPT_INV_VIA_OUT
;
602 fw3_ipt_rule_src_dest(struct fw3_ipt_rule
*r
,
603 struct fw3_address
*src
, struct fw3_address
*dest
)
605 if ((src
&& src
->range
) || (dest
&& dest
->range
))
607 fw3_ipt_rule_addarg(r
, false, "-m", "iprange");
614 fw3_ipt_rule_addarg(r
, src
->invert
, "--src-range",
615 fw3_address_to_string(src
, false, false));
618 else if (r
->h
->family
== FW3_FAMILY_V6
)
620 r
->e6
.ipv6
.src
= src
->address
.v6
;
621 r
->e6
.ipv6
.smsk
= src
->mask
.v6
;
624 for (i
= 0; i
< 4; i
++)
625 r
->e6
.ipv6
.src
.s6_addr32
[i
] &= r
->e6
.ipv6
.smsk
.s6_addr32
[i
];
628 r
->e6
.ipv6
.invflags
|= IP6T_INV_SRCIP
;
633 r
->e
.ip
.src
= src
->address
.v4
;
634 r
->e
.ip
.smsk
= src
->mask
.v4
;
636 r
->e
.ip
.src
.s_addr
&= r
->e
.ip
.smsk
.s_addr
;
639 r
->e
.ip
.invflags
|= IPT_INV_SRCIP
;
643 if (dest
&& dest
->set
)
647 fw3_ipt_rule_addarg(r
, dest
->invert
, "--dst-range",
648 fw3_address_to_string(dest
, false, false));
651 else if (r
->h
->family
== FW3_FAMILY_V6
)
653 r
->e6
.ipv6
.dst
= dest
->address
.v6
;
654 r
->e6
.ipv6
.dmsk
= dest
->mask
.v6
;
657 for (i
= 0; i
< 4; i
++)
658 r
->e6
.ipv6
.dst
.s6_addr32
[i
] &= r
->e6
.ipv6
.dmsk
.s6_addr32
[i
];
661 r
->e6
.ipv6
.invflags
|= IP6T_INV_DSTIP
;
666 r
->e
.ip
.dst
= dest
->address
.v4
;
667 r
->e
.ip
.dmsk
= dest
->mask
.v4
;
669 r
->e
.ip
.dst
.s_addr
&= r
->e
.ip
.dmsk
.s_addr
;
672 r
->e
.ip
.invflags
|= IPT_INV_DSTIP
;
678 fw3_ipt_rule_sport_dport(struct fw3_ipt_rule
*r
,
679 struct fw3_port
*sp
, struct fw3_port
*dp
)
681 char buf
[sizeof("65535:65535\0")];
683 if ((!sp
|| !sp
->set
) && (!dp
|| !dp
->set
))
686 if (!get_protoname(r
))
691 if (sp
->port_min
== sp
->port_max
)
692 sprintf(buf
, "%u", sp
->port_min
);
694 sprintf(buf
, "%u:%u", sp
->port_min
, sp
->port_max
);
696 fw3_ipt_rule_addarg(r
, sp
->invert
, "--sport", buf
);
701 if (dp
->port_min
== dp
->port_max
)
702 sprintf(buf
, "%u", dp
->port_min
);
704 sprintf(buf
, "%u:%u", dp
->port_min
, dp
->port_max
);
706 fw3_ipt_rule_addarg(r
, dp
->invert
, "--dport", buf
);
711 fw3_ipt_rule_device(struct fw3_ipt_rule
*r
, const char *device
, bool out
)
714 struct fw3_device dev
= { .any
= false };
715 strncpy(dev
.name
, device
, sizeof(dev
.name
) - 1);
716 fw3_ipt_rule_in_out(r
, (out
) ? NULL
: &dev
, (out
) ? &dev
: NULL
);
721 fw3_ipt_rule_mac(struct fw3_ipt_rule
*r
, struct fw3_mac
*mac
)
723 char buf
[sizeof("ff:ff:ff:ff:ff:ff\0")];
724 uint8_t *addr
= mac
->mac
.ether_addr_octet
;
729 sprintf(buf
, "%02x:%02x:%02x:%02x:%02x:%02x",
730 addr
[0], addr
[1], addr
[2], addr
[3], addr
[4], addr
[5]);
732 fw3_ipt_rule_addarg(r
, false, "-m", "mac");
733 fw3_ipt_rule_addarg(r
, mac
->invert
, "--mac-source", buf
);
737 fw3_ipt_rule_icmptype(struct fw3_ipt_rule
*r
, struct fw3_icmptype
*icmp
)
739 char buf
[sizeof("255/255\0")];
745 if (r
->h
->family
== FW3_FAMILY_V6
)
747 if (icmp
->code6_min
== 0 && icmp
->code6_max
== 0xFF)
748 sprintf(buf
, "%u", icmp
->type6
);
750 sprintf(buf
, "%u/%u", icmp
->type6
, icmp
->code6_min
);
752 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmpv6-type", buf
);
757 if (icmp
->code_min
== 0 && icmp
->code_max
== 0xFF)
758 sprintf(buf
, "%u", icmp
->type
);
760 sprintf(buf
, "%u/%u", icmp
->type
, icmp
->code_min
);
762 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmp-type", buf
);
767 fw3_ipt_rule_limit(struct fw3_ipt_rule
*r
, struct fw3_limit
*limit
)
769 char buf
[sizeof("-4294967296/second\0")];
771 if (!limit
|| limit
->rate
<= 0)
774 fw3_ipt_rule_addarg(r
, false, "-m", "limit");
776 sprintf(buf
, "%u/%s", limit
->rate
, fw3_limit_units
[limit
->unit
]);
777 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit", buf
);
779 if (limit
->burst
> 0)
781 sprintf(buf
, "%u", limit
->burst
);
782 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit-burst", buf
);
787 fw3_ipt_rule_ipset(struct fw3_ipt_rule
*r
, struct fw3_setmatch
*match
)
789 char buf
[sizeof("dst,dst,dst\0")];
793 struct fw3_ipset
*set
;
794 struct fw3_ipset_datatype
*type
;
796 if (!match
|| !match
->set
|| !match
->ptr
)
800 list_for_each_entry(type
, &set
->datatypes
, list
)
808 p
+= sprintf(p
, "%s", match
->dir
[i
] ? match
->dir
[i
] : type
->dir
);
812 fw3_ipt_rule_addarg(r
, false, "-m", "set");
814 fw3_ipt_rule_addarg(r
, match
->invert
, "--match-set",
815 set
->external
? set
->external
: set
->name
);
817 fw3_ipt_rule_addarg(r
, false, buf
, NULL
);
821 fw3_ipt_rule_time(struct fw3_ipt_rule
*r
, struct fw3_time
*time
)
824 struct tm empty
= { 0 };
826 char buf
[84]; /* sizeof("1,2,3,...,30,31\0") */
829 bool d1
= memcmp(&time
->datestart
, &empty
, sizeof(empty
));
830 bool d2
= memcmp(&time
->datestop
, &empty
, sizeof(empty
));
832 if (!d1
&& !d2
&& !time
->timestart
&& !time
->timestop
&&
833 !(time
->monthdays
& 0xFFFFFFFE) && !(time
->weekdays
& 0xFE))
838 fw3_ipt_rule_addarg(r
, false, "-m", "time");
841 fw3_ipt_rule_addarg(r
, false, "--utc", NULL
);
845 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestart
);
846 fw3_ipt_rule_addarg(r
, false, "--datestart", buf
);
851 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestop
);
852 fw3_ipt_rule_addarg(r
, false, "--datestop", buf
);
857 sprintf(buf
, "%02d:%02d:%02d",
858 time
->timestart
/ 3600,
859 time
->timestart
% 3600 / 60,
860 time
->timestart
% 60);
862 fw3_ipt_rule_addarg(r
, false, "--timestart", buf
);
867 sprintf(buf
, "%02d:%02d:%02d",
868 time
->timestop
/ 3600,
869 time
->timestop
% 3600 / 60,
870 time
->timestop
% 60);
872 fw3_ipt_rule_addarg(r
, false, "--timestop", buf
);
875 if (time
->monthdays
& 0xFFFFFFFE)
877 for (i
= 1, p
= buf
; i
< 32; i
++)
879 if (hasbit(time
->monthdays
, i
))
884 p
+= sprintf(p
, "%u", i
);
888 fw3_ipt_rule_addarg(r
, hasbit(time
->monthdays
, 0), "--monthdays", buf
);
891 if (time
->weekdays
& 0xFE)
893 for (i
= 1, p
= buf
; i
< 8; i
++)
895 if (hasbit(time
->weekdays
, i
))
900 p
+= sprintf(p
, "%u", i
);
904 fw3_ipt_rule_addarg(r
, hasbit(time
->weekdays
, 0), "--weekdays", buf
);
909 fw3_ipt_rule_mark(struct fw3_ipt_rule
*r
, struct fw3_mark
*mark
)
911 char buf
[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
913 if (!mark
|| !mark
->set
)
916 if (mark
->mask
< 0xFFFFFFFF)
917 sprintf(buf
, "0x%x/0x%x", mark
->mark
, mark
->mask
);
919 sprintf(buf
, "0x%x", mark
->mark
);
921 fw3_ipt_rule_addarg(r
, false, "-m", "mark");
922 fw3_ipt_rule_addarg(r
, mark
->invert
, "--mark", buf
);
926 fw3_ipt_rule_comment(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
935 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
938 fw3_ipt_rule_addarg(r
, false, "-m", "comment");
939 fw3_ipt_rule_addarg(r
, false, "--comment", buf
);
943 fw3_ipt_rule_extra(struct fw3_ipt_rule
*r
, const char *extra
)
947 if (!extra
|| !*extra
)
950 s
= fw3_strdup(extra
);
952 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
954 tmp
= realloc(r
->argv
, (r
->argc
+ 1) * sizeof(*r
->argv
));
960 r
->argv
[r
->argc
++] = fw3_strdup(p
);
968 rule_print6(struct ip6t_entry
*e
)
970 char buf1
[INET6_ADDRSTRLEN
], buf2
[INET6_ADDRSTRLEN
];
973 if (e
->ipv6
.flags
& IP6T_F_PROTO
)
975 if (e
->ipv6
.flags
& XT_INV_PROTO
)
978 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e6
));
981 printf(" -p %s", pname
);
983 printf(" -p %u", e
->ipv6
.proto
);
986 if (e
->ipv6
.iniface
[0])
988 if (e
->ipv6
.flags
& IP6T_INV_VIA_IN
)
991 printf(" -i %s", e
->ipv6
.iniface
);
994 if (e
->ipv6
.outiface
[0])
996 if (e
->ipv6
.flags
& IP6T_INV_VIA_OUT
)
999 printf(" -o %s", e
->ipv6
.outiface
);
1002 if (memcmp(&e
->ipv6
.src
, &in6addr_any
, sizeof(struct in6_addr
)))
1004 if (e
->ipv6
.flags
& IP6T_INV_SRCIP
)
1008 inet_ntop(AF_INET6
, &e
->ipv6
.src
, buf1
, sizeof(buf1
)),
1009 inet_ntop(AF_INET6
, &e
->ipv6
.smsk
, buf2
, sizeof(buf2
)));
1012 if (memcmp(&e
->ipv6
.dst
, &in6addr_any
, sizeof(struct in6_addr
)))
1014 if (e
->ipv6
.flags
& IP6T_INV_DSTIP
)
1018 inet_ntop(AF_INET6
, &e
->ipv6
.dst
, buf1
, sizeof(buf1
)),
1019 inet_ntop(AF_INET6
, &e
->ipv6
.dmsk
, buf2
, sizeof(buf2
)));
1025 rule_print4(struct ipt_entry
*e
)
1027 struct in_addr in_zero
= { 0 };
1028 char buf1
[sizeof("255.255.255.255\0")], buf2
[sizeof("255.255.255.255\0")];
1033 if (e
->ip
.flags
& XT_INV_PROTO
)
1036 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e
));
1039 printf(" -p %s", pname
);
1041 printf(" -p %u", e
->ip
.proto
);
1044 if (e
->ip
.iniface
[0])
1046 if (e
->ip
.flags
& IPT_INV_VIA_IN
)
1049 printf(" -i %s", e
->ip
.iniface
);
1052 if (e
->ip
.outiface
[0])
1054 if (e
->ip
.flags
& IPT_INV_VIA_OUT
)
1057 printf(" -o %s", e
->ip
.outiface
);
1060 if (memcmp(&e
->ip
.src
, &in_zero
, sizeof(struct in_addr
)))
1062 if (e
->ip
.flags
& IPT_INV_SRCIP
)
1066 inet_ntop(AF_INET
, &e
->ip
.src
, buf1
, sizeof(buf1
)),
1067 inet_ntop(AF_INET
, &e
->ip
.smsk
, buf2
, sizeof(buf2
)));
1070 if (memcmp(&e
->ip
.dst
, &in_zero
, sizeof(struct in_addr
)))
1072 if (e
->ip
.flags
& IPT_INV_DSTIP
)
1076 inet_ntop(AF_INET
, &e
->ip
.dst
, buf1
, sizeof(buf1
)),
1077 inet_ntop(AF_INET
, &e
->ip
.dmsk
, buf2
, sizeof(buf2
)));
1082 rule_print(struct fw3_ipt_rule
*r
, const char *prefix
, const char *chain
)
1084 debug(r
->h
, "%s %s", prefix
, chain
);
1086 #ifndef DISABLE_IPV6
1087 if (r
->h
->family
== FW3_FAMILY_V6
)
1088 rule_print6(&r
->e6
);
1093 fw3_xt_print_matches(&r
->e
.ip
, r
->matches
);
1094 fw3_xt_print_target(&r
->e
.ip
, r
->target
);
1100 parse_option(struct fw3_ipt_rule
*r
, int optc
, bool inv
)
1102 struct xtables_rule_match
*m
;
1103 struct xtables_match
*em
;
1105 /* is a target option */
1106 if (r
->target
&& fw3_xt_has_target_parse(r
->target
) &&
1107 optc
>= r
->target
->option_offset
&&
1108 optc
< (r
->target
->option_offset
+ 256))
1110 xtables_option_tpcall(optc
, r
->argv
, inv
, r
->target
, &r
->e
);
1114 /* try to dispatch argument to one of the match parsers */
1115 for (m
= r
->matches
; m
; m
= m
->next
)
1119 if (m
->completed
|| !fw3_xt_has_match_parse(em
))
1122 if (optc
< em
->option_offset
||
1123 optc
>= (em
->option_offset
+ 256))
1126 xtables_option_mpcall(optc
, r
->argv
, inv
, em
, &r
->e
);
1130 /* unhandled option, might belong to a protocol match */
1131 if ((em
= load_protomatch(r
)) != NULL
)
1133 init_match(r
, em
, false);
1135 r
->protocol_loaded
= true;
1142 warn("parse_option(): option '%s' needs argument", r
->argv
[optind
-1]);
1145 warn("parse_option(): unknown option '%s'", r
->argv
[optind
-1]);
1151 fw3_ipt_rule_addarg(struct fw3_ipt_rule
*r
, bool inv
,
1152 const char *k
, const char *v
)
1160 n
= inv
+ !!k
+ !!v
;
1161 tmp
= realloc(r
->argv
, (r
->argc
+ n
) * sizeof(*tmp
));
1169 r
->argv
[r
->argc
++] = fw3_strdup("!");
1171 r
->argv
[r
->argc
++] = fw3_strdup(k
);
1174 r
->argv
[r
->argc
++] = fw3_strdup(v
);
1177 static unsigned char *
1178 rule_mask(struct fw3_ipt_rule
*r
)
1181 unsigned char *p
, *mask
= NULL
;
1182 struct xtables_rule_match
*m
;
1184 #define SZ(x) XT_ALIGN(sizeof(struct x))
1186 #ifndef DISABLE_IPV6
1187 if (r
->h
->family
== FW3_FAMILY_V6
)
1191 for (m
= r
->matches
; m
; m
= m
->next
)
1192 s
+= SZ(ip6t_entry_match
) + m
->match
->size
;
1194 s
+= SZ(ip6t_entry_target
);
1196 s
+= r
->target
->size
;
1198 mask
= fw3_alloc(s
);
1199 memset(mask
, 0xFF, SZ(ip6t_entry
));
1200 p
= mask
+ SZ(ip6t_entry
);
1202 for (m
= r
->matches
; m
; m
= m
->next
)
1204 memset(p
, 0xFF, SZ(ip6t_entry_match
) + m
->match
->userspacesize
);
1205 p
+= SZ(ip6t_entry_match
) + m
->match
->size
;
1208 memset(p
, 0xFF, SZ(ip6t_entry_target
) + (r
->target
) ? r
->target
->userspacesize
: 0);
1215 for (m
= r
->matches
; m
; m
= m
->next
)
1216 s
+= SZ(ipt_entry_match
) + m
->match
->size
;
1218 s
+= SZ(ipt_entry_target
);
1220 s
+= r
->target
->size
;
1222 mask
= fw3_alloc(s
);
1223 memset(mask
, 0xFF, SZ(ipt_entry
));
1224 p
= mask
+ SZ(ipt_entry
);
1226 for (m
= r
->matches
; m
; m
= m
->next
)
1228 memset(p
, 0xFF, SZ(ipt_entry_match
) + m
->match
->userspacesize
);
1229 p
+= SZ(ipt_entry_match
) + m
->match
->size
;
1232 memset(p
, 0xFF, SZ(ipt_entry_target
) + (r
->target
) ? r
->target
->userspacesize
: 0);
1239 rule_build(struct fw3_ipt_rule
*r
)
1241 size_t s
, target_size
= (r
->target
) ? r
->target
->t
->u
.target_size
: 0;
1242 struct xtables_rule_match
*m
;
1244 #ifndef DISABLE_IPV6
1245 if (r
->h
->family
== FW3_FAMILY_V6
)
1247 struct ip6t_entry
*e6
;
1249 s
= XT_ALIGN(sizeof(struct ip6t_entry
));
1251 for (m
= r
->matches
; m
; m
= m
->next
)
1252 s
+= m
->match
->m
->u
.match_size
;
1254 e6
= fw3_alloc(s
+ target_size
);
1256 memcpy(e6
, &r
->e6
, sizeof(struct ip6t_entry
));
1258 e6
->target_offset
= s
;
1259 e6
->next_offset
= s
+ target_size
;
1263 for (m
= r
->matches
; m
; m
= m
->next
)
1265 memcpy(e6
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1266 s
+= m
->match
->m
->u
.match_size
;
1270 memcpy(e6
->elems
+ s
, r
->target
->t
, target_size
);
1277 struct ipt_entry
*e
;
1279 s
= XT_ALIGN(sizeof(struct ipt_entry
));
1281 for (m
= r
->matches
; m
; m
= m
->next
)
1282 s
+= m
->match
->m
->u
.match_size
;
1284 e
= fw3_alloc(s
+ target_size
);
1286 memcpy(e
, &r
->e
, sizeof(struct ipt_entry
));
1288 e
->target_offset
= s
;
1289 e
->next_offset
= s
+ target_size
;
1293 for (m
= r
->matches
; m
; m
= m
->next
)
1295 memcpy(e
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1296 s
+= m
->match
->m
->u
.match_size
;
1300 memcpy(e
->elems
+ s
, r
->target
->t
, target_size
);
1307 __fw3_ipt_rule_append(struct fw3_ipt_rule
*r
, bool repl
, const char *fmt
, ...)
1310 unsigned char *mask
;
1312 struct xtables_rule_match
*m
;
1313 struct xtables_match
*em
;
1314 struct xtables_target
*et
;
1315 struct xtables_globals
*g
;
1323 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
1326 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
1327 g
->opts
= g
->orig_opts
;
1332 while ((optc
= getopt_long(r
->argc
, r
->argv
, "-:m:j:", g
->opts
,
1338 em
= find_match(r
, optarg
);
1342 warn("fw3_ipt_rule_append(): Can't find match '%s'", optarg
);
1346 init_match(r
, em
, true);
1350 et
= get_target(r
, optarg
);
1354 warn("fw3_ipt_rule_append(): Can't find target '%s'", optarg
);
1361 if ((optarg
[0] == '!') && (optarg
[1] == '\0'))
1368 warn("fw3_ipt_rule_append(): Bad argument '%s'", optarg
);
1372 if (parse_option(r
, optc
, inv
))
1380 for (m
= r
->matches
; m
; m
= m
->next
)
1381 xtables_option_mfcall(m
->match
);
1384 xtables_option_tfcall(r
->target
);
1386 rule
= rule_build(r
);
1388 #ifndef DISABLE_IPV6
1389 if (r
->h
->family
== FW3_FAMILY_V6
)
1393 mask
= rule_mask(r
);
1395 while (ip6tc_delete_entry(buf
, rule
, mask
, r
->h
->handle
))
1397 rule_print(r
, "-D", buf
);
1403 rule_print(r
, "-A", buf
);
1405 if (!ip6tc_append_entry(buf
, rule
, r
->h
->handle
))
1406 warn("ip6tc_append_entry(): %s", ip6tc_strerror(errno
));
1413 mask
= rule_mask(r
);
1415 while (iptc_delete_entry(buf
, rule
, mask
, r
->h
->handle
))
1417 rule_print(r
, "-D", buf
);
1423 rule_print(r
, "-A", buf
);
1425 if (!iptc_append_entry(buf
, rule
, r
->h
->handle
))
1426 warn("iptc_append_entry(): %s\n", iptc_strerror(errno
));
1432 for (i
= 1; i
< r
->argc
; i
++)
1437 xtables_rule_matches_free(&r
->matches
);
1444 /* reset all targets and matches */
1445 for (em
= xtables_matches
; em
; em
= em
->next
)
1448 for (et
= xtables_targets
; et
; et
= et
->next
)
1454 xtables_free_opts(1);
1457 struct fw3_ipt_rule
*
1458 fw3_ipt_rule_create(struct fw3_ipt_handle
*handle
, struct fw3_protocol
*proto
,
1459 struct fw3_device
*in
, struct fw3_device
*out
,
1460 struct fw3_address
*src
, struct fw3_address
*dest
)
1462 struct fw3_ipt_rule
*r
;
1464 r
= fw3_ipt_rule_new(handle
);
1466 fw3_ipt_rule_proto(r
, proto
);
1467 fw3_ipt_rule_in_out(r
, in
, out
);
1468 fw3_ipt_rule_src_dest(r
, src
, dest
);