6a569100c7e16d36c86ecb7738e40308340bcfe0
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 */
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
= LINUX_VERSION(x
, y
, z
);
57 static void fw3_init_extensions(void)
64 libipt_MASQUERADE_init();
65 libipt_REDIRECT_init();
69 libxt_conntrack_init();
77 libxt_standard_init();
84 struct fw3_ipt_handle
*
85 fw3_ipt_open(enum fw3_family family
, enum fw3_table table
)
87 struct fw3_ipt_handle
*h
;
89 h
= fw3_alloc(sizeof(*h
));
93 if (family
== FW3_FAMILY_V6
)
95 h
->family
= FW3_FAMILY_V6
;
97 h
->handle
= ip6tc_init(fw3_flag_names
[table
]);
99 xtables_set_params(&xtg6
);
100 xtables_set_nfproto(NFPROTO_IPV6
);
104 h
->family
= FW3_FAMILY_V4
;
106 h
->handle
= iptc_init(fw3_flag_names
[table
]);
108 xtables_set_params(&xtg
);
109 xtables_set_nfproto(NFPROTO_IPV4
);
118 xtables_pending_matches
= NULL
;
119 xtables_pending_targets
= NULL
;
121 xtables_matches
= NULL
;
122 xtables_targets
= NULL
;
124 fw3_init_extensions();
130 debug(struct fw3_ipt_handle
*h
, const char *fmt
, ...)
134 printf("%s -t %s ", (h
->family
== FW3_FAMILY_V6
) ? "ip6tables" : "iptables",
135 fw3_flag_names
[h
->table
]);
143 fw3_ipt_set_policy(struct fw3_ipt_handle
*h
, const char *chain
,
144 enum fw3_flag policy
)
147 debug(h
, "-P %s %s\n", chain
, fw3_flag_names
[policy
]);
149 if (h
->family
== FW3_FAMILY_V6
)
150 ip6tc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
152 iptc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
156 fw3_ipt_delete_chain(struct fw3_ipt_handle
*h
, const char *chain
)
160 debug(h
, "-F %s\n", chain
);
161 debug(h
, "-X %s\n", chain
);
164 if (h
->family
== FW3_FAMILY_V6
)
166 if (ip6tc_flush_entries(chain
, h
->handle
))
167 ip6tc_delete_chain(chain
, h
->handle
);
171 if (iptc_flush_entries(chain
, h
->handle
))
172 iptc_delete_chain(chain
, h
->handle
);
177 fw3_ipt_delete_rules(struct fw3_ipt_handle
*h
, const char *target
)
180 const struct ipt_entry
*e
;
181 const struct ip6t_entry
*e6
;
186 if (h
->family
== FW3_FAMILY_V6
)
188 for (chain
= ip6tc_first_chain(h
->handle
);
190 chain
= ip6tc_next_chain(h
->handle
))
195 for (num
= 0, e6
= ip6tc_first_rule(chain
, h
->handle
);
197 num
++, e6
= ip6tc_next_rule(e6
, h
->handle
))
199 t
= ip6tc_get_target(e6
, h
->handle
);
201 if (*t
&& !strcmp(t
, target
))
204 debug(h
, "-D %s %u\n", chain
, num
+ 1);
206 ip6tc_delete_num_entry(chain
, num
, h
->handle
);
216 for (chain
= iptc_first_chain(h
->handle
);
218 chain
= iptc_next_chain(h
->handle
))
223 for (num
= 0, e
= iptc_first_rule(chain
, h
->handle
);
225 num
++, e
= iptc_next_rule(e
, h
->handle
))
227 t
= iptc_get_target(e
, h
->handle
);
229 if (*t
&& !strcmp(t
, target
))
232 debug(h
, "-D %s %u\n", chain
, num
+ 1);
234 iptc_delete_num_entry(chain
, num
, 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
)
265 if (h
->family
== FW3_FAMILY_V6
)
267 for (chain
= ip6tc_first_chain(h
->handle
);
269 chain
= ip6tc_next_chain(h
->handle
))
271 ip6tc_flush_entries(chain
, h
->handle
);
274 for (chain
= ip6tc_first_chain(h
->handle
);
276 chain
= ip6tc_next_chain(h
->handle
))
278 ip6tc_delete_chain(chain
, h
->handle
);
283 for (chain
= iptc_first_chain(h
->handle
);
285 chain
= iptc_next_chain(h
->handle
))
287 iptc_flush_entries(chain
, h
->handle
);
290 for (chain
= iptc_first_chain(h
->handle
);
292 chain
= iptc_next_chain(h
->handle
))
294 iptc_delete_chain(chain
, h
->handle
);
300 fw3_ipt_commit(struct fw3_ipt_handle
*h
)
304 if (h
->family
== FW3_FAMILY_V6
)
306 rv
= ip6tc_commit(h
->handle
);
308 fprintf(stderr
, "ip6tc_commit(): %s\n", ip6tc_strerror(errno
));
312 rv
= iptc_commit(h
->handle
);
314 fprintf(stderr
, "iptc_commit(): %s\n", iptc_strerror(errno
));
320 struct fw3_ipt_rule
*
321 fw3_ipt_rule_new(struct fw3_ipt_handle
*h
)
323 struct fw3_ipt_rule
*r
;
325 r
= fw3_alloc(sizeof(*r
));
328 r
->argv
= fw3_alloc(sizeof(char *));
329 r
->argv
[r
->argc
++] = "fw3";
336 is_chain(struct fw3_ipt_handle
*h
, const char *name
)
338 if (h
->family
== FW3_FAMILY_V6
)
339 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
;
375 strcpy(m
->m
->u
.user
.name
, m
->real_name
? m
->real_name
: m
->name
);
376 m
->m
->u
.user
.revision
= m
->revision
;
377 m
->m
->u
.match_size
= s
;
379 /* free previous userspace data */
383 m
->udata
= fw3_alloc(m
->udata_size
);
389 /* don't merge options if no_clone is set and this match is a clone */
390 if (no_clone
&& (m
== m
->next
))
393 /* merge option table */
394 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
397 g
->opts
= xtables_options_xfrm(g
->orig_opts
, g
->opts
,
398 m
->x6_options
, &m
->option_offset
);
401 g
->opts
= xtables_merge_options(g
->orig_opts
, g
->opts
,
402 m
->extra_opts
, &m
->option_offset
);
406 need_protomatch(struct fw3_ipt_rule
*r
, const char *pname
)
411 if (!xtables_find_match(pname
, XTF_DONT_LOAD
, NULL
))
414 return !r
->protocol_loaded
;
417 static struct xtables_match
*
418 load_protomatch(struct fw3_ipt_rule
*r
)
420 const char *pname
= get_protoname(r
);
422 if (!need_protomatch(r
, pname
))
425 return find_match(r
, pname
);
428 static struct xtables_target
*
429 get_target(struct fw3_ipt_rule
*r
, const char *name
)
432 struct xtables_target
*t
;
433 struct xtables_globals
*g
;
435 bool chain
= is_chain(r
->h
, name
);
438 t
= xtables_find_target(XT_STANDARD_TARGET
, XTF_LOAD_MUST_SUCCEED
);
440 t
= xtables_find_target(name
, XTF_TRY_LOAD
);
445 s
= XT_ALIGN(sizeof(struct xt_entry_target
)) + t
->size
;
449 strcpy(t
->t
->u
.user
.name
, name
);
451 strcpy(t
->t
->u
.user
.name
, t
->real_name
);
453 t
->t
->u
.user
.revision
= t
->revision
;
454 t
->t
->u
.target_size
= s
;
459 t
->udata
= fw3_alloc(t
->udata_size
);
465 /* merge option table */
466 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
469 g
->opts
= xtables_options_xfrm(g
->orig_opts
, g
->opts
,
470 t
->x6_options
, &t
->option_offset
);
472 g
->opts
= xtables_merge_options(g
->orig_opts
, g
->opts
,
473 t
->extra_opts
, &t
->option_offset
);
481 fw3_ipt_rule_proto(struct fw3_ipt_rule
*r
, struct fw3_protocol
*proto
)
485 if (!proto
|| proto
->any
)
488 pr
= proto
->protocol
;
490 if (r
->h
->family
== FW3_FAMILY_V6
)
495 r
->e6
.ipv6
.proto
= pr
;
496 r
->e6
.ipv6
.flags
|= IP6T_F_PROTO
;
499 r
->e6
.ipv6
.invflags
|= XT_INV_PROTO
;
506 r
->e
.ip
.invflags
|= XT_INV_PROTO
;
513 fw3_ipt_rule_in_out(struct fw3_ipt_rule
*r
,
514 struct fw3_device
*in
, struct fw3_device
*out
)
516 if (r
->h
->family
== FW3_FAMILY_V6
)
520 xtables_parse_interface(in
->name
, r
->e6
.ipv6
.iniface
,
521 r
->e6
.ipv6
.iniface_mask
);
524 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_IN
;
527 if (out
&& !out
->any
)
529 xtables_parse_interface(out
->name
, r
->e6
.ipv6
.outiface
,
530 r
->e6
.ipv6
.outiface_mask
);
533 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_OUT
;
540 xtables_parse_interface(in
->name
, r
->e
.ip
.iniface
,
541 r
->e
.ip
.iniface_mask
);
544 r
->e
.ip
.invflags
|= IPT_INV_VIA_IN
;
547 if (out
&& !out
->any
)
549 xtables_parse_interface(out
->name
, r
->e
.ip
.outiface
,
550 r
->e
.ip
.outiface_mask
);
553 r
->e
.ip
.invflags
|= IPT_INV_VIA_OUT
;
560 ip4prefix2mask(int prefix
, struct in_addr
*mask
)
562 mask
->s_addr
= htonl(~((1 << (32 - prefix
)) - 1));
566 ip6prefix2mask(int prefix
, struct in6_addr
*mask
)
568 char *p
= (char *)mask
;
572 memset(p
, 0xff, prefix
/ 8);
573 memset(p
+ (prefix
/ 8) + 1, 0, (128 - prefix
) / 8);
574 p
[prefix
/ 8] = 0xff << (8 - (prefix
& 7));
578 memset(mask
, 0, sizeof(*mask
));
583 fw3_ipt_rule_src_dest(struct fw3_ipt_rule
*r
,
584 struct fw3_address
*src
, struct fw3_address
*dest
)
588 if ((src
&& src
->range
) || (dest
&& dest
->range
))
590 fw3_ipt_rule_addarg(r
, false, "-m", "iprange");
597 fw3_ipt_rule_addarg(r
, src
->invert
, "--src-range",
598 fw3_address_to_string(src
, false));
600 else if (r
->h
->family
== FW3_FAMILY_V6
)
602 r
->e6
.ipv6
.src
= src
->address
.v6
;
603 ip6prefix2mask(src
->mask
, &r
->e6
.ipv6
.smsk
);
605 for (i
= 0; i
< 4; i
++)
606 r
->e6
.ipv6
.src
.s6_addr32
[i
] &= r
->e6
.ipv6
.smsk
.s6_addr32
[i
];
609 r
->e6
.ipv6
.invflags
|= IP6T_INV_SRCIP
;
613 r
->e
.ip
.src
= src
->address
.v4
;
614 ip4prefix2mask(src
->mask
, &r
->e
.ip
.smsk
);
616 r
->e
.ip
.src
.s_addr
&= r
->e
.ip
.smsk
.s_addr
;
619 r
->e
.ip
.invflags
|= IPT_INV_SRCIP
;
623 if (dest
&& dest
->set
)
627 fw3_ipt_rule_addarg(r
, dest
->invert
, "--dst-range",
628 fw3_address_to_string(dest
, false));
630 else if (r
->h
->family
== FW3_FAMILY_V6
)
632 r
->e6
.ipv6
.dst
= dest
->address
.v6
;
633 ip6prefix2mask(dest
->mask
, &r
->e6
.ipv6
.dmsk
);
635 for (i
= 0; i
< 4; i
++)
636 r
->e6
.ipv6
.dst
.s6_addr32
[i
] &= r
->e6
.ipv6
.dmsk
.s6_addr32
[i
];
639 r
->e6
.ipv6
.invflags
|= IP6T_INV_DSTIP
;
643 r
->e
.ip
.dst
= dest
->address
.v4
;
644 ip4prefix2mask(dest
->mask
, &r
->e
.ip
.dmsk
);
646 r
->e
.ip
.dst
.s_addr
&= r
->e
.ip
.dmsk
.s_addr
;
649 r
->e
.ip
.invflags
|= IPT_INV_DSTIP
;
655 fw3_ipt_rule_sport_dport(struct fw3_ipt_rule
*r
,
656 struct fw3_port
*sp
, struct fw3_port
*dp
)
658 char buf
[sizeof("65535:65535\0")];
660 if ((!sp
|| !sp
->set
) && (!dp
|| !dp
->set
))
663 if (!get_protoname(r
))
668 if (sp
->port_min
== sp
->port_max
)
669 sprintf(buf
, "%u", sp
->port_min
);
671 sprintf(buf
, "%u:%u", sp
->port_min
, sp
->port_max
);
673 fw3_ipt_rule_addarg(r
, sp
->invert
, "--sport", buf
);
678 if (dp
->port_min
== dp
->port_max
)
679 sprintf(buf
, "%u", dp
->port_min
);
681 sprintf(buf
, "%u:%u", dp
->port_min
, dp
->port_max
);
683 fw3_ipt_rule_addarg(r
, dp
->invert
, "--dport", buf
);
688 fw3_ipt_rule_mac(struct fw3_ipt_rule
*r
, struct fw3_mac
*mac
)
693 fw3_ipt_rule_addarg(r
, false, "-m", "mac");
694 fw3_ipt_rule_addarg(r
, mac
->invert
, "--mac-source", ether_ntoa(&mac
->mac
));
698 fw3_ipt_rule_icmptype(struct fw3_ipt_rule
*r
, struct fw3_icmptype
*icmp
)
700 char buf
[sizeof("255/255\0")];
705 if (r
->h
->family
== FW3_FAMILY_V6
)
707 if (icmp
->code6_min
== 0 && icmp
->code6_max
== 0xFF)
708 sprintf(buf
, "%u", icmp
->type6
);
710 sprintf(buf
, "%u/%u", icmp
->type6
, icmp
->code6_min
);
712 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmpv6-type", buf
);
716 if (icmp
->code_min
== 0 && icmp
->code_max
== 0xFF)
717 sprintf(buf
, "%u", icmp
->type
);
719 sprintf(buf
, "%u/%u", icmp
->type
, icmp
->code_min
);
721 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmp-type", buf
);
726 fw3_ipt_rule_limit(struct fw3_ipt_rule
*r
, struct fw3_limit
*limit
)
728 char buf
[sizeof("-4294967296/second\0")];
730 if (!limit
|| limit
->rate
<= 0)
733 fw3_ipt_rule_addarg(r
, false, "-m", "limit");
735 sprintf(buf
, "%u/%s", limit
->rate
, fw3_limit_units
[limit
->unit
]);
736 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit", buf
);
738 if (limit
->burst
> 0)
740 sprintf(buf
, "%u", limit
->burst
);
741 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit-burst", buf
);
746 fw3_ipt_rule_ipset(struct fw3_ipt_rule
*r
, struct fw3_ipset
*ipset
,
749 char buf
[sizeof("dst,dst,dst\0")];
752 struct fw3_ipset_datatype
*type
;
757 list_for_each_entry(type
, &ipset
->datatypes
, list
)
762 p
+= sprintf(p
, "%s", type
->dest
? "dst" : "src");
765 fw3_ipt_rule_addarg(r
, false, "-m", "set");
767 fw3_ipt_rule_addarg(r
, invert
, "--match-set",
768 ipset
->external
? ipset
->external
: ipset
->name
);
770 fw3_ipt_rule_addarg(r
, false, buf
, NULL
);
774 fw3_ipt_rule_time(struct fw3_ipt_rule
*r
, struct fw3_time
*time
)
777 struct tm empty
= { 0 };
779 char buf
[84]; /* sizeof("1,2,3,...,30,31\0") */
782 bool d1
= memcmp(&time
->datestart
, &empty
, sizeof(empty
));
783 bool d2
= memcmp(&time
->datestop
, &empty
, sizeof(empty
));
785 if (!d1
&& !d2
&& !time
->timestart
&& !time
->timestop
&&
786 !(time
->monthdays
& 0xFFFFFFFE) && !(time
->weekdays
& 0xFE))
791 fw3_ipt_rule_addarg(r
, false, "-m", "time");
794 fw3_ipt_rule_addarg(r
, false, "--utc", NULL
);
798 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestart
);
799 fw3_ipt_rule_addarg(r
, false, "--datestart", buf
);
804 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestop
);
805 fw3_ipt_rule_addarg(r
, false, "--datestop", buf
);
810 sprintf(buf
, "%02d:%02d:%02d",
811 time
->timestart
/ 3600,
812 time
->timestart
% 3600 / 60,
813 time
->timestart
% 60);
815 fw3_ipt_rule_addarg(r
, false, "--timestart", buf
);
820 sprintf(buf
, "%02d:%02d:%02d",
821 time
->timestop
/ 3600,
822 time
->timestop
% 3600 / 60,
823 time
->timestop
% 60);
825 fw3_ipt_rule_addarg(r
, false, "--timestop", buf
);
828 if (time
->monthdays
& 0xFFFFFFFE)
830 for (i
= 1, p
= buf
; i
< 32; i
++)
832 if (hasbit(time
->monthdays
, i
))
837 p
+= sprintf(p
, "%u", i
);
841 fw3_ipt_rule_addarg(r
, hasbit(time
->monthdays
, 0), "--monthdays", buf
);
844 if (time
->weekdays
& 0xFE)
846 for (i
= 1, p
= buf
; i
< 8; i
++)
848 if (hasbit(time
->weekdays
, i
))
853 p
+= sprintf(p
, "%u", i
);
857 fw3_ipt_rule_addarg(r
, hasbit(time
->weekdays
, 0), "--weekdays", buf
);
862 fw3_ipt_rule_mark(struct fw3_ipt_rule
*r
, struct fw3_mark
*mark
)
864 char buf
[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
866 if (!mark
|| !mark
->set
)
869 if (mark
->mask
< 0xFFFFFFFF)
870 sprintf(buf
, "0x%x/0x%x", mark
->mark
, mark
->mask
);
872 sprintf(buf
, "0x%x", mark
->mark
);
874 fw3_ipt_rule_addarg(r
, false, "-m", "mark");
875 fw3_ipt_rule_addarg(r
, mark
->invert
, "--mark", buf
);
879 fw3_ipt_rule_comment(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
888 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
891 fw3_ipt_rule_addarg(r
, false, "-m", "comment");
892 fw3_ipt_rule_addarg(r
, false, "--comment", buf
);
896 fw3_ipt_rule_extra(struct fw3_ipt_rule
*r
, const char *extra
)
900 if (!extra
|| !*extra
)
903 s
= fw3_strdup(extra
);
905 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
907 tmp
= realloc(r
->argv
, (r
->argc
+ 1) * sizeof(*r
->argv
));
913 r
->argv
[r
->argc
++] = fw3_strdup(p
);
920 rule_print6(struct ip6t_entry
*e
)
922 char buf
[INET6_ADDRSTRLEN
];
925 if (e
->ipv6
.flags
& IP6T_F_PROTO
)
927 if (e
->ipv6
.flags
& XT_INV_PROTO
)
930 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e6
));
933 printf(" -p %s", pname
);
935 printf(" -p %u", e
->ipv6
.proto
);
938 if (e
->ipv6
.iniface
[0])
940 if (e
->ipv6
.flags
& IP6T_INV_VIA_IN
)
943 printf(" -i %s", e
->ipv6
.iniface
);
946 if (e
->ipv6
.outiface
[0])
948 if (e
->ipv6
.flags
& IP6T_INV_VIA_OUT
)
951 printf(" -o %s", e
->ipv6
.outiface
);
954 if (memcmp(&e
->ipv6
.src
, &in6addr_any
, sizeof(struct in6_addr
)))
956 if (e
->ipv6
.flags
& IP6T_INV_SRCIP
)
959 printf(" -s %s/%u", inet_ntop(AF_INET6
, &e
->ipv6
.src
, buf
, sizeof(buf
)),
960 xtables_ip6mask_to_cidr(&e
->ipv6
.smsk
));
963 if (memcmp(&e
->ipv6
.dst
, &in6addr_any
, sizeof(struct in6_addr
)))
965 if (e
->ipv6
.flags
& IP6T_INV_DSTIP
)
968 printf(" -d %s/%u", inet_ntop(AF_INET6
, &e
->ipv6
.dst
, buf
, sizeof(buf
)),
969 xtables_ip6mask_to_cidr(&e
->ipv6
.dmsk
));
974 rule_print4(struct ipt_entry
*e
)
976 struct in_addr in_zero
= { 0 };
977 char buf
[sizeof("255.255.255.255\0")];
982 if (e
->ip
.flags
& XT_INV_PROTO
)
985 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e
));
988 printf(" -p %s", pname
);
990 printf(" -p %u", e
->ip
.proto
);
993 if (e
->ip
.iniface
[0])
995 if (e
->ip
.flags
& IPT_INV_VIA_IN
)
998 printf(" -i %s", e
->ip
.iniface
);
1001 if (e
->ip
.outiface
[0])
1003 if (e
->ip
.flags
& IPT_INV_VIA_OUT
)
1006 printf(" -o %s", e
->ip
.outiface
);
1009 if (memcmp(&e
->ip
.src
, &in_zero
, sizeof(struct in_addr
)))
1011 if (e
->ip
.flags
& IPT_INV_SRCIP
)
1014 printf(" -s %s/%u", inet_ntop(AF_INET
, &e
->ip
.src
, buf
, sizeof(buf
)),
1015 xtables_ipmask_to_cidr(&e
->ip
.smsk
));
1018 if (memcmp(&e
->ip
.dst
, &in_zero
, sizeof(struct in_addr
)))
1020 if (e
->ip
.flags
& IPT_INV_DSTIP
)
1023 printf(" -d %s/%u", inet_ntop(AF_INET
, &e
->ip
.dst
, buf
, sizeof(buf
)),
1024 xtables_ipmask_to_cidr(&e
->ip
.dmsk
));
1029 rule_print(struct fw3_ipt_rule
*r
, const char *chain
)
1031 struct xtables_rule_match
*rm
;
1032 struct xtables_match
*m
;
1033 struct xtables_target
*t
;
1035 debug(r
->h
, "-A %s", chain
);
1037 if (r
->h
->family
== FW3_FAMILY_V6
)
1038 rule_print6(&r
->e6
);
1042 for (rm
= r
->matches
; rm
; rm
= rm
->next
)
1045 printf(" -m %s", m
->alias
? m
->alias(m
->m
) : m
->m
->u
.user
.name
);
1048 m
->save(&r
->e
.ip
, m
->m
);
1054 printf(" -j %s", t
->alias
? t
->alias(t
->t
) : t
->t
->u
.user
.name
);
1057 t
->save(&r
->e
.ip
, t
->t
);
1064 parse_option(struct fw3_ipt_rule
*r
, int optc
, bool inv
)
1066 struct xtables_rule_match
*m
;
1067 struct xtables_match
*em
;
1069 /* is a target option */
1070 if (r
->target
&& (r
->target
->parse
|| r
->target
->x6_parse
) &&
1071 optc
>= r
->target
->option_offset
&&
1072 optc
< (r
->target
->option_offset
+ 256))
1074 xtables_option_tpcall(optc
, r
->argv
, inv
, r
->target
, &r
->e
);
1078 /* try to dispatch argument to one of the match parsers */
1079 for (m
= r
->matches
; m
; m
= m
->next
)
1083 if (m
->completed
|| (!em
->parse
&& !em
->x6_parse
))
1086 if (optc
< em
->option_offset
||
1087 optc
>= (em
->option_offset
+ 256))
1090 xtables_option_mpcall(optc
, r
->argv
, inv
, em
, &r
->e
);
1094 /* unhandled option, might belong to a protocol match */
1095 if ((em
= load_protomatch(r
)) != NULL
)
1097 init_match(r
, em
, false);
1099 r
->protocol_loaded
= true;
1106 fprintf(stderr
, "parse_option(): option '%s' needs argument\n",
1110 fprintf(stderr
, "parse_option(): unknown option '%s'\n",
1117 fw3_ipt_rule_addarg(struct fw3_ipt_rule
*r
, bool inv
,
1118 const char *k
, const char *v
)
1126 n
= inv
+ !!k
+ !!v
;
1127 tmp
= realloc(r
->argv
, (r
->argc
+ n
) * sizeof(*tmp
));
1135 r
->argv
[r
->argc
++] = fw3_strdup("!");
1137 r
->argv
[r
->argc
++] = fw3_strdup(k
);
1140 r
->argv
[r
->argc
++] = fw3_strdup(v
);
1144 fw3_ipt_rule_append(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
1147 struct xtables_rule_match
*m
;
1148 struct xtables_match
*em
;
1149 struct xtables_target
*et
;
1150 struct xtables_globals
*g
;
1151 struct ipt_entry
*e
;
1152 struct ip6t_entry
*e6
;
1160 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
1163 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
1164 g
->opts
= g
->orig_opts
;
1169 while ((optc
= getopt_long(r
->argc
, r
->argv
, "m:j:", g
->opts
, NULL
)) != -1)
1174 em
= find_match(r
, optarg
);
1178 fprintf(stderr
, "fw3_ipt_rule_append(): Can't find match '%s'\n", optarg
);
1182 init_match(r
, em
, true);
1186 et
= get_target(r
, optarg
);
1190 fprintf(stderr
, "fw3_ipt_rule_append(): Can't find target '%s'\n", optarg
);
1197 if ((optarg
[0] == '!') && (optarg
[1] == '\0'))
1203 fprintf(stderr
, "fw3_ipt_rule_append(): Bad argument '%s'\n", optarg
);
1207 if (parse_option(r
, optc
, inv
))
1215 for (m
= r
->matches
; m
; m
= m
->next
)
1216 xtables_option_mfcall(m
->match
);
1219 xtables_option_tfcall(r
->target
);
1224 if (r
->h
->family
== FW3_FAMILY_V6
)
1226 s
= XT_ALIGN(sizeof(struct ip6t_entry
));
1228 for (m
= r
->matches
; m
; m
= m
->next
)
1229 s
+= m
->match
->m
->u
.match_size
;
1231 e6
= fw3_alloc(s
+ r
->target
->t
->u
.target_size
);
1233 memcpy(e6
, &r
->e6
, sizeof(struct ip6t_entry
));
1235 e6
->target_offset
= s
;
1236 e6
->next_offset
= s
+ r
->target
->t
->u
.target_size
;
1240 for (m
= r
->matches
; m
; m
= m
->next
)
1242 memcpy(e6
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1243 s
+= m
->match
->m
->u
.match_size
;
1246 memcpy(e6
->elems
+ s
, r
->target
->t
, r
->target
->t
->u
.target_size
);
1247 ip6tc_append_entry(buf
, e6
, r
->h
->handle
);
1252 s
= XT_ALIGN(sizeof(struct ipt_entry
));
1254 for (m
= r
->matches
; m
; m
= m
->next
)
1255 s
+= m
->match
->m
->u
.match_size
;
1257 e
= fw3_alloc(s
+ r
->target
->t
->u
.target_size
);
1259 memcpy(e
, &r
->e
, sizeof(struct ipt_entry
));
1261 e
->target_offset
= s
;
1262 e
->next_offset
= s
+ r
->target
->t
->u
.target_size
;
1266 for (m
= r
->matches
; m
; m
= m
->next
)
1268 memcpy(e
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1269 s
+= m
->match
->m
->u
.match_size
;
1272 memcpy(e
->elems
+ s
, r
->target
->t
, r
->target
->t
->u
.target_size
);
1274 if (!iptc_append_entry(buf
, e
, r
->h
->handle
))
1275 fprintf(stderr
, "iptc_append_entry(): %s\n", iptc_strerror(errno
));
1280 for (i
= 1; i
< r
->argc
; i
++)
1285 xtables_rule_matches_free(&r
->matches
);
1290 /* reset all targets and matches */
1291 for (em
= xtables_matches
; em
; em
= em
->next
)
1294 for (et
= xtables_targets
; et
; et
= et
->next
)
1300 xtables_free_opts(1);
1303 struct fw3_ipt_rule
*
1304 fw3_ipt_rule_create(struct fw3_ipt_handle
*handle
, struct fw3_protocol
*proto
,
1305 struct fw3_device
*in
, struct fw3_device
*out
,
1306 struct fw3_address
*src
, struct fw3_address
*dest
)
1308 struct fw3_ipt_rule
*r
;
1310 r
= fw3_ipt_rule_new(handle
);
1312 fw3_ipt_rule_proto(r
, proto
);
1313 fw3_ipt_rule_in_out(r
, in
, out
);
1314 fw3_ipt_rule_src_dest(r
, src
, dest
);