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 struct fw3_ipt_handle
*
58 fw3_ipt_open(enum fw3_family family
, enum fw3_table table
)
60 struct fw3_ipt_handle
*h
;
62 h
= fw3_alloc(sizeof(*h
));
66 if (family
== FW3_FAMILY_V6
)
68 h
->family
= FW3_FAMILY_V6
;
70 h
->handle
= ip6tc_init(fw3_flag_names
[table
]);
72 xtables_set_params(&xtg6
);
73 xtables_set_nfproto(NFPROTO_IPV6
);
77 h
->family
= FW3_FAMILY_V4
;
79 h
->handle
= iptc_init(fw3_flag_names
[table
]);
81 xtables_set_params(&xtg
);
82 xtables_set_nfproto(NFPROTO_IPV4
);
91 xtables_pending_matches
= NULL
;
92 xtables_pending_targets
= NULL
;
94 xtables_matches
= NULL
;
95 xtables_targets
= NULL
;
105 fw3_ipt_set_policy(struct fw3_ipt_handle
*h
, const char *chain
,
106 enum fw3_flag policy
)
109 printf("-P %s %s\n", chain
, fw3_flag_names
[policy
]);
111 if (h
->family
== FW3_FAMILY_V6
)
112 ip6tc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
114 iptc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
118 fw3_ipt_delete_chain(struct fw3_ipt_handle
*h
, const char *chain
)
122 printf("-F %s\n", chain
);
123 printf("-X %s\n", chain
);
126 if (h
->family
== FW3_FAMILY_V6
)
128 if (ip6tc_flush_entries(chain
, h
->handle
))
129 ip6tc_delete_chain(chain
, h
->handle
);
133 if (iptc_flush_entries(chain
, h
->handle
))
134 iptc_delete_chain(chain
, h
->handle
);
139 fw3_ipt_delete_rules(struct fw3_ipt_handle
*h
, const char *target
)
142 const struct ipt_entry
*e
;
143 const struct ip6t_entry
*e6
;
148 if (h
->family
== FW3_FAMILY_V6
)
150 for (chain
= ip6tc_first_chain(h
->handle
);
152 chain
= ip6tc_next_chain(h
->handle
))
157 for (num
= 0, e6
= ip6tc_first_rule(chain
, h
->handle
);
159 num
++, e6
= ip6tc_next_rule(e6
, h
->handle
))
161 t
= ip6tc_get_target(e6
, h
->handle
);
163 if (*t
&& !strcmp(t
, target
))
166 printf("-D %s %u\n", chain
, num
+ 1);
168 ip6tc_delete_num_entry(chain
, num
, h
->handle
);
178 for (chain
= iptc_first_chain(h
->handle
);
180 chain
= iptc_next_chain(h
->handle
))
185 for (num
= 0, e
= iptc_first_rule(chain
, h
->handle
);
187 num
++, e
= iptc_next_rule(e
, h
->handle
))
189 t
= iptc_get_target(e
, h
->handle
);
191 if (*t
&& !strcmp(t
, target
))
194 printf("-D %s %u\n", chain
, num
+ 1);
196 iptc_delete_num_entry(chain
, num
, h
->handle
);
207 fw3_ipt_flush(struct fw3_ipt_handle
*h
)
211 if (h
->family
== FW3_FAMILY_V6
)
213 for (chain
= ip6tc_first_chain(h
->handle
);
215 chain
= ip6tc_next_chain(h
->handle
))
217 ip6tc_flush_entries(chain
, h
->handle
);
220 for (chain
= ip6tc_first_chain(h
->handle
);
222 chain
= ip6tc_next_chain(h
->handle
))
224 ip6tc_delete_chain(chain
, h
->handle
);
229 for (chain
= iptc_first_chain(h
->handle
);
231 chain
= iptc_next_chain(h
->handle
))
233 iptc_flush_entries(chain
, h
->handle
);
236 for (chain
= iptc_first_chain(h
->handle
);
238 chain
= iptc_next_chain(h
->handle
))
240 iptc_delete_chain(chain
, h
->handle
);
246 fw3_ipt_commit(struct fw3_ipt_handle
*h
)
250 if (h
->family
== FW3_FAMILY_V6
)
252 rv
= ip6tc_commit(h
->handle
);
254 fprintf(stderr
, "ip6tc_commit(): %s\n", ip6tc_strerror(errno
));
258 rv
= iptc_commit(h
->handle
);
260 fprintf(stderr
, "iptc_commit(): %s\n", iptc_strerror(errno
));
266 struct fw3_ipt_rule
*
267 fw3_ipt_rule_new(struct fw3_ipt_handle
*h
)
269 struct fw3_ipt_rule
*r
;
271 r
= fw3_alloc(sizeof(*r
));
274 r
->argv
= fw3_alloc(sizeof(char *));
275 r
->argv
[r
->argc
++] = "fw3";
282 is_chain(struct fw3_ipt_handle
*h
, const char *name
)
284 if (h
->family
== FW3_FAMILY_V6
)
285 return ip6tc_is_chain(name
, h
->handle
);
287 return iptc_is_chain(name
, h
->handle
);
291 get_protoname(struct fw3_ipt_rule
*r
)
293 const struct xtables_pprot
*pp
;
296 for (pp
= xtables_chain_protos
; pp
->name
; pp
++)
297 if (pp
->num
== r
->protocol
)
298 return (char *)pp
->name
;
303 static struct xtables_match
*
304 find_match(struct fw3_ipt_rule
*r
, const char *name
)
306 return xtables_find_match(name
, XTF_TRY_LOAD
, &r
->matches
);
310 init_match(struct fw3_ipt_rule
*r
, struct xtables_match
*m
, bool no_clone
)
313 struct xtables_globals
*g
;
318 s
= XT_ALIGN(sizeof(struct xt_entry_match
)) + m
->size
;
321 strcpy(m
->m
->u
.user
.name
, m
->real_name
? m
->real_name
: m
->name
);
322 m
->m
->u
.user
.revision
= m
->revision
;
323 m
->m
->u
.match_size
= s
;
325 /* free previous userspace data */
329 m
->udata
= fw3_alloc(m
->udata_size
);
335 /* don't merge options if no_clone is set and this match is a clone */
336 if (no_clone
&& (m
== m
->next
))
339 /* merge option table */
340 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
343 g
->opts
= xtables_options_xfrm(g
->orig_opts
, g
->opts
,
344 m
->x6_options
, &m
->option_offset
);
347 g
->opts
= xtables_merge_options(g
->orig_opts
, g
->opts
,
348 m
->extra_opts
, &m
->option_offset
);
352 need_protomatch(struct fw3_ipt_rule
*r
, const char *pname
)
357 if (!xtables_find_match(pname
, XTF_DONT_LOAD
, NULL
))
360 return !r
->protocol_loaded
;
363 static struct xtables_match
*
364 load_protomatch(struct fw3_ipt_rule
*r
)
366 const char *pname
= get_protoname(r
);
368 if (!need_protomatch(r
, pname
))
371 return find_match(r
, pname
);
374 static struct xtables_target
*
375 get_target(struct fw3_ipt_rule
*r
, const char *name
)
378 struct xtables_target
*t
;
379 struct xtables_globals
*g
;
381 bool chain
= is_chain(r
->h
, name
);
384 t
= xtables_find_target(XT_STANDARD_TARGET
, XTF_LOAD_MUST_SUCCEED
);
386 t
= xtables_find_target(name
, XTF_TRY_LOAD
);
391 s
= XT_ALIGN(sizeof(struct xt_entry_target
)) + t
->size
;
395 strcpy(t
->t
->u
.user
.name
, name
);
397 strcpy(t
->t
->u
.user
.name
, t
->real_name
);
399 t
->t
->u
.user
.revision
= t
->revision
;
400 t
->t
->u
.target_size
= s
;
405 t
->udata
= fw3_alloc(t
->udata_size
);
411 /* merge option table */
412 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
415 g
->opts
= xtables_options_xfrm(g
->orig_opts
, g
->opts
,
416 t
->x6_options
, &t
->option_offset
);
418 g
->opts
= xtables_merge_options(g
->orig_opts
, g
->opts
,
419 t
->extra_opts
, &t
->option_offset
);
427 fw3_ipt_rule_proto(struct fw3_ipt_rule
*r
, struct fw3_protocol
*proto
)
431 if (!proto
|| proto
->any
)
434 pr
= proto
->protocol
;
436 if (r
->h
->family
== FW3_FAMILY_V6
)
441 r
->e6
.ipv6
.proto
= pr
;
442 r
->e6
.ipv6
.flags
|= IP6T_F_PROTO
;
445 r
->e6
.ipv6
.invflags
|= XT_INV_PROTO
;
452 r
->e
.ip
.invflags
|= XT_INV_PROTO
;
459 fw3_ipt_rule_in_out(struct fw3_ipt_rule
*r
,
460 struct fw3_device
*in
, struct fw3_device
*out
)
462 if (r
->h
->family
== FW3_FAMILY_V6
)
466 xtables_parse_interface(in
->name
, r
->e6
.ipv6
.iniface
,
467 r
->e6
.ipv6
.iniface_mask
);
470 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_IN
;
473 if (out
&& !out
->any
)
475 xtables_parse_interface(out
->name
, r
->e6
.ipv6
.outiface
,
476 r
->e6
.ipv6
.outiface_mask
);
479 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_OUT
;
486 xtables_parse_interface(in
->name
, r
->e
.ip
.iniface
,
487 r
->e
.ip
.iniface_mask
);
490 r
->e
.ip
.invflags
|= IPT_INV_VIA_IN
;
493 if (out
&& !out
->any
)
495 xtables_parse_interface(out
->name
, r
->e
.ip
.outiface
,
496 r
->e
.ip
.outiface_mask
);
499 r
->e
.ip
.invflags
|= IPT_INV_VIA_OUT
;
506 ip4prefix2mask(int prefix
, struct in_addr
*mask
)
508 mask
->s_addr
= htonl(~((1 << (32 - prefix
)) - 1));
512 ip6prefix2mask(int prefix
, struct in6_addr
*mask
)
514 char *p
= (char *)mask
;
518 memset(p
, 0xff, prefix
/ 8);
519 memset(p
+ (prefix
/ 8) + 1, 0, (128 - prefix
) / 8);
520 p
[prefix
/ 8] = 0xff << (8 - (prefix
& 7));
524 memset(mask
, 0, sizeof(*mask
));
529 fw3_ipt_rule_src_dest(struct fw3_ipt_rule
*r
,
530 struct fw3_address
*src
, struct fw3_address
*dest
)
534 if ((src
&& src
->range
) || (dest
&& dest
->range
))
536 fw3_ipt_rule_addarg(r
, false, "-m", "iprange");
543 fw3_ipt_rule_addarg(r
, src
->invert
, "--src-range",
544 fw3_address_to_string(src
, false));
546 else if (r
->h
->family
== FW3_FAMILY_V6
)
548 r
->e6
.ipv6
.src
= src
->address
.v6
;
549 ip6prefix2mask(src
->mask
, &r
->e6
.ipv6
.smsk
);
551 for (i
= 0; i
< 4; i
++)
552 r
->e6
.ipv6
.src
.s6_addr32
[i
] &= r
->e6
.ipv6
.smsk
.s6_addr32
[i
];
555 r
->e6
.ipv6
.invflags
|= IP6T_INV_SRCIP
;
559 r
->e
.ip
.src
= src
->address
.v4
;
560 ip4prefix2mask(src
->mask
, &r
->e
.ip
.smsk
);
562 r
->e
.ip
.src
.s_addr
&= r
->e
.ip
.smsk
.s_addr
;
565 r
->e
.ip
.invflags
|= IPT_INV_SRCIP
;
569 if (dest
&& dest
->set
)
573 fw3_ipt_rule_addarg(r
, dest
->invert
, "--dst-range",
574 fw3_address_to_string(dest
, false));
576 else if (r
->h
->family
== FW3_FAMILY_V6
)
578 r
->e6
.ipv6
.dst
= dest
->address
.v6
;
579 ip6prefix2mask(dest
->mask
, &r
->e6
.ipv6
.dmsk
);
581 for (i
= 0; i
< 4; i
++)
582 r
->e6
.ipv6
.dst
.s6_addr32
[i
] &= r
->e6
.ipv6
.dmsk
.s6_addr32
[i
];
585 r
->e6
.ipv6
.invflags
|= IP6T_INV_DSTIP
;
589 r
->e
.ip
.dst
= dest
->address
.v4
;
590 ip4prefix2mask(dest
->mask
, &r
->e
.ip
.dmsk
);
592 r
->e
.ip
.dst
.s_addr
&= r
->e
.ip
.dmsk
.s_addr
;
595 r
->e
.ip
.invflags
|= IPT_INV_DSTIP
;
601 fw3_ipt_rule_sport_dport(struct fw3_ipt_rule
*r
,
602 struct fw3_port
*sp
, struct fw3_port
*dp
)
604 char buf
[sizeof("65535:65535\0")];
606 if ((!sp
|| !sp
->set
) && (!dp
|| !dp
->set
))
609 if (!get_protoname(r
))
614 if (sp
->port_min
== sp
->port_max
)
615 sprintf(buf
, "%u", sp
->port_min
);
617 sprintf(buf
, "%u:%u", sp
->port_min
, sp
->port_max
);
619 fw3_ipt_rule_addarg(r
, sp
->invert
, "--sport", buf
);
624 if (dp
->port_min
== dp
->port_max
)
625 sprintf(buf
, "%u", dp
->port_min
);
627 sprintf(buf
, "%u:%u", dp
->port_min
, dp
->port_max
);
629 fw3_ipt_rule_addarg(r
, dp
->invert
, "--dport", buf
);
634 fw3_ipt_rule_mac(struct fw3_ipt_rule
*r
, struct fw3_mac
*mac
)
639 fw3_ipt_rule_addarg(r
, false, "-m", "mac");
640 fw3_ipt_rule_addarg(r
, mac
->invert
, "--mac-source", ether_ntoa(&mac
->mac
));
644 fw3_ipt_rule_icmptype(struct fw3_ipt_rule
*r
, struct fw3_icmptype
*icmp
)
646 char buf
[sizeof("255/255\0")];
651 if (r
->h
->family
== FW3_FAMILY_V6
)
653 if (icmp
->code6_min
== 0 && icmp
->code6_max
== 0xFF)
654 sprintf(buf
, "%u", icmp
->type6
);
656 sprintf(buf
, "%u/%u", icmp
->type6
, icmp
->code6_min
);
658 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmpv6-type", buf
);
662 if (icmp
->code_min
== 0 && icmp
->code_max
== 0xFF)
663 sprintf(buf
, "%u", icmp
->type
);
665 sprintf(buf
, "%u/%u", icmp
->type
, icmp
->code_min
);
667 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmp-type", buf
);
672 fw3_ipt_rule_limit(struct fw3_ipt_rule
*r
, struct fw3_limit
*limit
)
674 char buf
[sizeof("-4294967296/second\0")];
676 if (!limit
|| limit
->rate
<= 0)
679 fw3_ipt_rule_addarg(r
, false, "-m", "limit");
681 sprintf(buf
, "%u/%s", limit
->rate
, fw3_limit_units
[limit
->unit
]);
682 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit", buf
);
684 if (limit
->burst
> 0)
686 sprintf(buf
, "%u", limit
->burst
);
687 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit-burst", buf
);
692 fw3_ipt_rule_ipset(struct fw3_ipt_rule
*r
, struct fw3_ipset
*ipset
,
695 char buf
[sizeof("dst,dst,dst\0")];
698 struct fw3_ipset_datatype
*type
;
703 list_for_each_entry(type
, &ipset
->datatypes
, list
)
708 p
+= sprintf(p
, "%s", type
->dest
? "dst" : "src");
711 fw3_ipt_rule_addarg(r
, false, "-m", "set");
713 fw3_ipt_rule_addarg(r
, invert
, "--match-set",
714 ipset
->external
? ipset
->external
: ipset
->name
);
716 fw3_ipt_rule_addarg(r
, false, buf
, NULL
);
720 fw3_ipt_rule_time(struct fw3_ipt_rule
*r
, struct fw3_time
*time
)
723 struct tm empty
= { 0 };
725 char buf
[84]; /* sizeof("1,2,3,...,30,31\0") */
728 bool d1
= memcmp(&time
->datestart
, &empty
, sizeof(empty
));
729 bool d2
= memcmp(&time
->datestop
, &empty
, sizeof(empty
));
731 if (!d1
&& !d2
&& !time
->timestart
&& !time
->timestop
&&
732 !(time
->monthdays
& 0xFFFFFFFE) && !(time
->weekdays
& 0xFE))
737 fw3_ipt_rule_addarg(r
, false, "-m", "time");
740 fw3_ipt_rule_addarg(r
, false, "--utc", NULL
);
744 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestart
);
745 fw3_ipt_rule_addarg(r
, false, "--datestart", buf
);
750 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestop
);
751 fw3_ipt_rule_addarg(r
, false, "--datestop", buf
);
756 sprintf(buf
, "%02d:%02d:%02d",
757 time
->timestart
/ 3600,
758 time
->timestart
% 3600 / 60,
759 time
->timestart
% 60);
761 fw3_ipt_rule_addarg(r
, false, "--timestart", buf
);
766 sprintf(buf
, "%02d:%02d:%02d",
767 time
->timestop
/ 3600,
768 time
->timestop
% 3600 / 60,
769 time
->timestop
% 60);
771 fw3_ipt_rule_addarg(r
, false, "--timestop", buf
);
774 if (time
->monthdays
& 0xFFFFFFFE)
776 for (i
= 1, p
= buf
; i
< 32; i
++)
778 if (hasbit(time
->monthdays
, i
))
783 p
+= sprintf(p
, "%u", i
);
787 fw3_ipt_rule_addarg(r
, hasbit(time
->monthdays
, 0), "--monthdays", buf
);
790 if (time
->weekdays
& 0xFE)
792 for (i
= 1, p
= buf
; i
< 8; i
++)
794 if (hasbit(time
->weekdays
, i
))
799 p
+= sprintf(p
, "%u", i
);
803 fw3_ipt_rule_addarg(r
, hasbit(time
->weekdays
, 0), "--weekdays", buf
);
808 fw3_ipt_rule_mark(struct fw3_ipt_rule
*r
, struct fw3_mark
*mark
)
810 char buf
[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
812 if (!mark
|| !mark
->set
)
815 if (mark
->mask
< 0xFFFFFFFF)
816 sprintf(buf
, "0x%x/0x%x", mark
->mark
, mark
->mask
);
818 sprintf(buf
, "0x%x", mark
->mark
);
820 fw3_ipt_rule_addarg(r
, false, "-m", "mark");
821 fw3_ipt_rule_addarg(r
, mark
->invert
, "--mark", buf
);
825 fw3_ipt_rule_comment(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
834 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
837 fw3_ipt_rule_addarg(r
, false, "-m", "comment");
838 fw3_ipt_rule_addarg(r
, false, "--comment", buf
);
842 fw3_ipt_rule_extra(struct fw3_ipt_rule
*r
, const char *extra
)
846 if (!extra
|| !*extra
)
849 s
= fw3_strdup(extra
);
851 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
853 tmp
= realloc(r
->argv
, (r
->argc
+ 1) * sizeof(*r
->argv
));
859 r
->argv
[r
->argc
++] = fw3_strdup(p
);
866 rule_print6(struct ip6t_entry
*e
)
868 char buf
[INET6_ADDRSTRLEN
];
871 if (e
->ipv6
.flags
& IP6T_F_PROTO
)
873 if (e
->ipv6
.flags
& XT_INV_PROTO
)
876 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e6
));
879 printf(" -p %s", pname
);
881 printf(" -p %u", e
->ipv6
.proto
);
884 if (e
->ipv6
.iniface
[0])
886 if (e
->ipv6
.flags
& IP6T_INV_VIA_IN
)
889 printf(" -i %s", e
->ipv6
.iniface
);
892 if (e
->ipv6
.outiface
[0])
894 if (e
->ipv6
.flags
& IP6T_INV_VIA_OUT
)
897 printf(" -o %s", e
->ipv6
.outiface
);
900 if (memcmp(&e
->ipv6
.src
, &in6addr_any
, sizeof(struct in6_addr
)))
902 if (e
->ipv6
.flags
& IP6T_INV_SRCIP
)
905 printf(" -s %s/%u", inet_ntop(AF_INET6
, &e
->ipv6
.src
, buf
, sizeof(buf
)),
906 xtables_ip6mask_to_cidr(&e
->ipv6
.smsk
));
909 if (memcmp(&e
->ipv6
.dst
, &in6addr_any
, sizeof(struct in6_addr
)))
911 if (e
->ipv6
.flags
& IP6T_INV_DSTIP
)
914 printf(" -d %s/%u", inet_ntop(AF_INET6
, &e
->ipv6
.dst
, buf
, sizeof(buf
)),
915 xtables_ip6mask_to_cidr(&e
->ipv6
.dmsk
));
920 rule_print4(struct ipt_entry
*e
)
922 struct in_addr in_zero
= { 0 };
923 char buf
[sizeof("255.255.255.255\0")];
928 if (e
->ip
.flags
& XT_INV_PROTO
)
931 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e
));
934 printf(" -p %s", pname
);
936 printf(" -p %u", e
->ip
.proto
);
939 if (e
->ip
.iniface
[0])
941 if (e
->ip
.flags
& IPT_INV_VIA_IN
)
944 printf(" -i %s", e
->ip
.iniface
);
947 if (e
->ip
.outiface
[0])
949 if (e
->ip
.flags
& IPT_INV_VIA_OUT
)
952 printf(" -o %s", e
->ip
.outiface
);
955 if (memcmp(&e
->ip
.src
, &in_zero
, sizeof(struct in_addr
)))
957 if (e
->ip
.flags
& IPT_INV_SRCIP
)
960 printf(" -s %s/%u", inet_ntop(AF_INET
, &e
->ip
.src
, buf
, sizeof(buf
)),
961 xtables_ipmask_to_cidr(&e
->ip
.smsk
));
964 if (memcmp(&e
->ip
.dst
, &in_zero
, sizeof(struct in_addr
)))
966 if (e
->ip
.flags
& IPT_INV_DSTIP
)
969 printf(" -d %s/%u", inet_ntop(AF_INET
, &e
->ip
.dst
, buf
, sizeof(buf
)),
970 xtables_ipmask_to_cidr(&e
->ip
.dmsk
));
975 rule_print(struct fw3_ipt_rule
*r
, const char *chain
)
977 struct xtables_rule_match
*rm
;
978 struct xtables_match
*m
;
979 struct xtables_target
*t
;
981 printf("-A %s", chain
);
983 if (r
->h
->family
== FW3_FAMILY_V6
)
988 for (rm
= r
->matches
; rm
; rm
= rm
->next
)
991 printf(" -m %s", m
->alias
? m
->alias(m
->m
) : m
->m
->u
.user
.name
);
994 m
->save(&r
->e
.ip
, m
->m
);
1000 printf(" -j %s", t
->alias
? t
->alias(t
->t
) : t
->t
->u
.user
.name
);
1003 t
->save(&r
->e
.ip
, t
->t
);
1010 parse_option(struct fw3_ipt_rule
*r
, int optc
, bool inv
)
1012 struct xtables_rule_match
*m
;
1013 struct xtables_match
*em
;
1015 /* is a target option */
1016 if (r
->target
&& (r
->target
->parse
|| r
->target
->x6_parse
) &&
1017 optc
>= r
->target
->option_offset
&&
1018 optc
< (r
->target
->option_offset
+ 256))
1020 xtables_option_tpcall(optc
, r
->argv
, inv
, r
->target
, &r
->e
);
1024 /* try to dispatch argument to one of the match parsers */
1025 for (m
= r
->matches
; m
; m
= m
->next
)
1029 if (m
->completed
|| (!em
->parse
&& !em
->x6_parse
))
1032 if (optc
< em
->option_offset
||
1033 optc
>= (em
->option_offset
+ 256))
1036 xtables_option_mpcall(optc
, r
->argv
, inv
, em
, &r
->e
);
1040 /* unhandled option, might belong to a protocol match */
1041 if ((em
= load_protomatch(r
)) != NULL
)
1043 init_match(r
, em
, false);
1045 r
->protocol_loaded
= true;
1052 fprintf(stderr
, "parse_option(): option '%s' needs argument\n",
1056 fprintf(stderr
, "parse_option(): unknown option '%s'\n",
1063 fw3_ipt_rule_addarg(struct fw3_ipt_rule
*r
, bool inv
,
1064 const char *k
, const char *v
)
1072 n
= inv
+ !!k
+ !!v
;
1073 tmp
= realloc(r
->argv
, (r
->argc
+ n
) * sizeof(*tmp
));
1081 r
->argv
[r
->argc
++] = fw3_strdup("!");
1083 r
->argv
[r
->argc
++] = fw3_strdup(k
);
1086 r
->argv
[r
->argc
++] = fw3_strdup(v
);
1090 fw3_ipt_rule_append(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
1093 struct xtables_rule_match
*m
;
1094 struct xtables_match
*em
;
1095 struct xtables_target
*et
;
1096 struct xtables_globals
*g
;
1097 struct ipt_entry
*e
;
1098 struct ip6t_entry
*e6
;
1106 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
1109 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
1110 g
->opts
= g
->orig_opts
;
1115 while ((optc
= getopt_long(r
->argc
, r
->argv
, "m:j:", g
->opts
, NULL
)) != -1)
1120 em
= find_match(r
, optarg
);
1124 fprintf(stderr
, "fw3_ipt_rule_append(): Can't find match '%s'\n", optarg
);
1128 init_match(r
, em
, true);
1132 et
= get_target(r
, optarg
);
1136 fprintf(stderr
, "fw3_ipt_rule_append(): Can't find target '%s'\n", optarg
);
1143 if ((optarg
[0] == '!') && (optarg
[1] == '\0'))
1149 fprintf(stderr
, "fw3_ipt_rule_append(): Bad argument '%s'\n", optarg
);
1153 if (parse_option(r
, optc
, inv
))
1161 for (m
= r
->matches
; m
; m
= m
->next
)
1162 xtables_option_mfcall(m
->match
);
1165 xtables_option_tfcall(r
->target
);
1170 if (r
->h
->family
== FW3_FAMILY_V6
)
1172 s
= XT_ALIGN(sizeof(struct ip6t_entry
));
1174 for (m
= r
->matches
; m
; m
= m
->next
)
1175 s
+= m
->match
->m
->u
.match_size
;
1177 e6
= fw3_alloc(s
+ r
->target
->t
->u
.target_size
);
1179 memcpy(e6
, &r
->e6
, sizeof(struct ip6t_entry
));
1181 e6
->target_offset
= s
;
1182 e6
->next_offset
= s
+ r
->target
->t
->u
.target_size
;
1186 for (m
= r
->matches
; m
; m
= m
->next
)
1188 memcpy(e6
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1189 s
+= m
->match
->m
->u
.match_size
;
1192 memcpy(e6
->elems
+ s
, r
->target
->t
, r
->target
->t
->u
.target_size
);
1193 ip6tc_append_entry(buf
, e6
, r
->h
->handle
);
1198 s
= XT_ALIGN(sizeof(struct ipt_entry
));
1200 for (m
= r
->matches
; m
; m
= m
->next
)
1201 s
+= m
->match
->m
->u
.match_size
;
1203 e
= fw3_alloc(s
+ r
->target
->t
->u
.target_size
);
1205 memcpy(e
, &r
->e
, sizeof(struct ipt_entry
));
1207 e
->target_offset
= s
;
1208 e
->next_offset
= s
+ r
->target
->t
->u
.target_size
;
1212 for (m
= r
->matches
; m
; m
= m
->next
)
1214 memcpy(e
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1215 s
+= m
->match
->m
->u
.match_size
;
1218 memcpy(e
->elems
+ s
, r
->target
->t
, r
->target
->t
->u
.target_size
);
1220 if (!iptc_append_entry(buf
, e
, r
->h
->handle
))
1221 fprintf(stderr
, "iptc_append_entry(): %s\n", iptc_strerror(errno
));
1226 for (i
= 1; i
< r
->argc
; i
++)
1231 xtables_rule_matches_free(&r
->matches
);
1236 /* reset all targets and matches */
1237 for (em
= xtables_matches
; em
; em
= em
->next
)
1240 for (et
= xtables_targets
; et
; et
= et
->next
)
1246 xtables_free_opts(1);
1249 struct fw3_ipt_rule
*
1250 fw3_ipt_rule_create(struct fw3_ipt_handle
*handle
, struct fw3_protocol
*proto
,
1251 struct fw3_device
*in
, struct fw3_device
*out
,
1252 struct fw3_address
*src
, struct fw3_address
*dest
)
1254 struct fw3_ipt_rule
*r
;
1256 r
= fw3_ipt_rule_new(handle
);
1258 fw3_ipt_rule_proto(r
, proto
);
1259 fw3_ipt_rule_in_out(r
, in
, out
);
1260 fw3_ipt_rule_src_dest(r
, src
, dest
);