2 * firewall3 - 3rd OpenWrt UCI firewall implementation
4 * Copyright (C) 2013 Jo-Philipp Wich <jo@mein.io>
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.
24 #define C(f, tbl, tgt, fmt) \
25 { FW3_FAMILY_##f, FW3_TABLE_##tbl, FW3_FLAG_##tgt, fmt }
27 static const struct fw3_chain_spec zone_chains
[] = {
28 C(ANY
, FILTER
, UNSPEC
, "zone_?_input"),
29 C(ANY
, FILTER
, UNSPEC
, "zone_?_output"),
30 C(ANY
, FILTER
, UNSPEC
, "zone_?_forward"),
32 C(ANY
, FILTER
, SRC_ACCEPT
, "zone_?_src_ACCEPT"),
33 C(ANY
, FILTER
, SRC_REJECT
, "zone_?_src_REJECT"),
34 C(ANY
, FILTER
, SRC_DROP
, "zone_?_src_DROP"),
36 C(ANY
, FILTER
, ACCEPT
, "zone_?_dest_ACCEPT"),
37 C(ANY
, FILTER
, REJECT
, "zone_?_dest_REJECT"),
38 C(ANY
, FILTER
, DROP
, "zone_?_dest_DROP"),
40 C(V4
, NAT
, SNAT
, "zone_?_postrouting"),
41 C(V4
, NAT
, DNAT
, "zone_?_prerouting"),
43 C(ANY
, RAW
, HELPER
, "zone_?_helper"),
44 C(ANY
, RAW
, NOTRACK
, "zone_?_notrack"),
46 C(ANY
, FILTER
, CUSTOM_CHAINS
, "input_?_rule"),
47 C(ANY
, FILTER
, CUSTOM_CHAINS
, "output_?_rule"),
48 C(ANY
, FILTER
, CUSTOM_CHAINS
, "forwarding_?_rule"),
50 C(V4
, NAT
, CUSTOM_CHAINS
, "prerouting_?_rule"),
51 C(V4
, NAT
, CUSTOM_CHAINS
, "postrouting_?_rule"),
56 enum fw3_zone_logmask
{
57 FW3_ZONE_LOG_FILTER
= (1 << 0),
58 FW3_ZONE_LOG_MANGLE
= (1 << 1),
61 const struct fw3_option fw3_zone_opts
[] = {
62 FW3_OPT("enabled", bool, zone
, enabled
),
64 FW3_OPT("name", string
, zone
, name
),
65 FW3_OPT("family", family
, zone
, family
),
67 FW3_LIST("network", device
, zone
, networks
),
68 FW3_LIST("device", device
, zone
, devices
),
69 FW3_LIST("subnet", network
, zone
, subnets
),
71 FW3_OPT("input", target
, zone
, policy_input
),
72 FW3_OPT("forward", target
, zone
, policy_forward
),
73 FW3_OPT("output", target
, zone
, policy_output
),
75 FW3_OPT("masq", bool, zone
, masq
),
76 FW3_OPT("masq_allow_invalid", bool, zone
, masq_allow_invalid
),
77 FW3_LIST("masq_src", network
, zone
, masq_src
),
78 FW3_LIST("masq_dest", network
, zone
, masq_dest
),
80 FW3_OPT("extra", string
, zone
, extra_src
),
81 FW3_OPT("extra_src", string
, zone
, extra_src
),
82 FW3_OPT("extra_dest", string
, zone
, extra_dest
),
84 FW3_OPT("mtu_fix", bool, zone
, mtu_fix
),
85 FW3_OPT("custom_chains", bool, zone
, custom_chains
),
87 FW3_OPT("log", int, zone
, log
),
88 FW3_OPT("log_limit", limit
, zone
, log_limit
),
90 FW3_OPT("auto_helper", bool, zone
, auto_helper
),
91 FW3_LIST("helper", cthelper
, zone
, cthelpers
),
93 FW3_OPT("__flags_v4", int, zone
, flags
[0]),
94 FW3_OPT("__flags_v6", int, zone
, flags
[1]),
96 FW3_LIST("__addrs", address
, zone
, old_addrs
),
102 check_policy(struct uci_element
*e
, enum fw3_flag
*pol
, enum fw3_flag def
,
105 if (*pol
== FW3_FLAG_UNSPEC
)
107 warn_elem(e
, "has no %s policy specified, using default", name
);
110 else if (*pol
> FW3_FLAG_DROP
)
112 warn_elem(e
, "has invalid %s policy, using default", name
);
118 check_masq_addrs(struct list_head
*head
)
120 struct fw3_address
*addr
;
121 int n_addr
= 0, n_failed
= 0;
123 list_for_each_entry(addr
, head
, list
)
130 if (!addr
->set
&& addr
->resolved
)
134 return (n_addr
== 0 || n_failed
< n_addr
);
138 resolve_networks(struct uci_element
*e
, struct fw3_zone
*zone
)
140 struct fw3_device
*net
, *dev
, *tmp
;
142 list_for_each_entry(net
, &zone
->networks
, list
)
144 tmp
= fw3_ubus_device(net
->name
);
148 warn_elem(e
, "cannot resolve device of network '%s'", net
->name
);
152 list_for_each_entry(dev
, &zone
->devices
, list
)
153 if (!strcmp(dev
->name
, tmp
->name
))
156 snprintf(tmp
->network
, sizeof(tmp
->network
), "%s", net
->name
);
157 list_add_tail(&tmp
->list
, &zone
->devices
);
165 resolve_cthelpers(struct fw3_state
*s
, struct uci_element
*e
, struct fw3_zone
*zone
)
167 struct fw3_cthelpermatch
*match
;
169 if (list_empty(&zone
->cthelpers
))
171 if (!zone
->masq
&& zone
->auto_helper
)
173 fw3_setbit(zone
->flags
[0], FW3_FLAG_HELPER
);
174 fw3_setbit(zone
->flags
[1], FW3_FLAG_HELPER
);
180 list_for_each_entry(match
, &zone
->cthelpers
, list
)
184 warn_elem(e
, "must not use a negated helper match");
188 match
->ptr
= fw3_lookup_cthelper(s
, match
->name
);
192 warn_elem(e
, "refers to not existing helper '%s'", match
->name
);
196 if (fw3_is_family(match
->ptr
, FW3_FAMILY_V4
))
197 fw3_setbit(zone
->flags
[0], FW3_FLAG_HELPER
);
199 if (fw3_is_family(match
->ptr
, FW3_FAMILY_V6
))
200 fw3_setbit(zone
->flags
[1], FW3_FLAG_HELPER
);
207 struct fw3_zone
*zone
;
209 zone
= calloc(1, sizeof(*zone
));
213 INIT_LIST_HEAD(&zone
->networks
);
214 INIT_LIST_HEAD(&zone
->devices
);
215 INIT_LIST_HEAD(&zone
->subnets
);
216 INIT_LIST_HEAD(&zone
->masq_src
);
217 INIT_LIST_HEAD(&zone
->masq_dest
);
218 INIT_LIST_HEAD(&zone
->cthelpers
);
220 INIT_LIST_HEAD(&zone
->old_addrs
);
222 zone
->enabled
= true;
223 zone
->auto_helper
= true;
224 zone
->custom_chains
= true;
225 zone
->log_limit
.rate
= 10;
231 fw3_load_zones(struct fw3_state
*state
, struct uci_package
*p
)
233 struct uci_section
*s
;
234 struct uci_element
*e
;
235 struct fw3_zone
*zone
;
236 struct fw3_defaults
*defs
= &state
->defaults
;
238 INIT_LIST_HEAD(&state
->zones
);
240 uci_foreach_element(&p
->sections
, e
)
242 s
= uci_to_section(e
);
244 if (strcmp(s
->type
, "zone"))
247 zone
= fw3_alloc_zone();
252 if (!fw3_parse_options(zone
, fw3_zone_opts
, s
))
253 warn_elem(e
, "has invalid options");
261 if (!zone
->extra_dest
)
262 zone
->extra_dest
= zone
->extra_src
;
264 if (!defs
->custom_chains
&& zone
->custom_chains
)
265 zone
->custom_chains
= false;
267 if (!defs
->auto_helper
&& zone
->auto_helper
)
268 zone
->auto_helper
= false;
270 if (!zone
->name
|| !*zone
->name
)
272 warn_elem(e
, "has no name - ignoring");
277 if (strlen(zone
->name
) > FW3_ZONE_MAXNAMELEN
)
279 warn_elem(e
, "must not have a name longer than %u characters",
280 FW3_ZONE_MAXNAMELEN
);
285 fw3_ubus_zone_devices(zone
);
287 if (list_empty(&zone
->networks
) && list_empty(&zone
->devices
) &&
288 list_empty(&zone
->subnets
) && !zone
->extra_src
)
290 warn_elem(e
, "has no device, network, subnet or extra options");
293 if (!check_masq_addrs(&zone
->masq_src
))
295 warn_elem(e
, "has unresolved masq_src, disabling masq");
299 if (!check_masq_addrs(&zone
->masq_dest
))
301 warn_elem(e
, "has unresolved masq_dest, disabling masq");
305 check_policy(e
, &zone
->policy_input
, defs
->policy_input
, "input");
306 check_policy(e
, &zone
->policy_output
, defs
->policy_output
, "output");
307 check_policy(e
, &zone
->policy_forward
, defs
->policy_forward
, "forward");
309 resolve_networks(e
, zone
);
313 fw3_setbit(zone
->flags
[0], FW3_FLAG_SNAT
);
316 if (zone
->custom_chains
)
318 fw3_setbit(zone
->flags
[0], FW3_FLAG_SNAT
);
319 fw3_setbit(zone
->flags
[0], FW3_FLAG_DNAT
);
322 resolve_cthelpers(state
, e
, zone
);
324 fw3_setbit(zone
->flags
[0], fw3_to_src_target(zone
->policy_input
));
325 fw3_setbit(zone
->flags
[0], zone
->policy_forward
);
326 fw3_setbit(zone
->flags
[0], zone
->policy_output
);
328 fw3_setbit(zone
->flags
[1], fw3_to_src_target(zone
->policy_input
));
329 fw3_setbit(zone
->flags
[1], zone
->policy_forward
);
330 fw3_setbit(zone
->flags
[1], zone
->policy_output
);
332 list_add_tail(&zone
->list
, &state
->zones
);
338 format_chain(const char *fmt
, const char *zonename
)
340 static char chain
[32];
345 for (p
= chain
, rem
= sizeof(chain
); *fmt
; fmt
++) {
347 len
= snprintf(p
, rem
, "%s", zonename
);
349 if (len
< 0 || len
>= rem
)
370 print_zone_chain(struct fw3_ipt_handle
*handle
, struct fw3_state
*state
,
371 bool reload
, struct fw3_zone
*zone
)
374 struct fw3_ipt_rule
*r
;
375 const struct fw3_chain_spec
*c
;
377 const char *flt_chains
[] = {
380 "forward", "forwarding",
383 const char *nat_chains
[] = {
384 "prerouting", "prerouting",
385 "postrouting", "postrouting",
388 if (!fw3_is_family(zone
, handle
->family
))
391 set(zone
->flags
, handle
->family
, handle
->table
);
393 if (zone
->custom_chains
)
394 set(zone
->flags
, handle
->family
, FW3_FLAG_CUSTOM_CHAINS
);
396 for (c
= zone_chains
; c
->format
; c
++)
398 if (!fw3_is_family(c
, handle
->family
))
401 if (c
->table
!= handle
->table
)
405 !fw3_hasbit(zone
->flags
[handle
->family
== FW3_FAMILY_V6
], c
->flag
))
408 fw3_ipt_create_chain(handle
, reload
, format_chain(c
->format
, zone
->name
));
411 if (zone
->custom_chains
)
413 if (handle
->table
== FW3_TABLE_FILTER
)
415 for (i
= 0; i
< sizeof(flt_chains
)/sizeof(flt_chains
[0]); i
+= 2)
417 r
= fw3_ipt_rule_new(handle
);
418 fw3_ipt_rule_comment(r
, "Custom %s %s rule chain", zone
->name
, flt_chains
[i
+1]);
419 fw3_ipt_rule_target(r
, "%s_%s_rule", flt_chains
[i
+1], zone
->name
);
420 fw3_ipt_rule_append(r
, "zone_%s_%s", zone
->name
, flt_chains
[i
]);
423 else if (handle
->table
== FW3_TABLE_NAT
)
425 for (i
= 0; i
< sizeof(nat_chains
)/sizeof(nat_chains
[0]); i
+= 2)
427 r
= fw3_ipt_rule_new(handle
);
428 fw3_ipt_rule_comment(r
, "Custom %s %s rule chain", zone
->name
, nat_chains
[i
+1]);
429 fw3_ipt_rule_target(r
, "%s_%s_rule", nat_chains
[i
+1], zone
->name
);
430 fw3_ipt_rule_append(r
, "zone_%s_%s", zone
->name
, nat_chains
[i
]);
435 set(zone
->flags
, handle
->family
, handle
->table
);
439 print_interface_rule(struct fw3_ipt_handle
*handle
, struct fw3_state
*state
,
440 bool reload
, struct fw3_zone
*zone
,
441 struct fw3_device
*dev
, struct fw3_address
*sub
)
443 struct fw3_protocol tcp
= { .protocol
= 6 };
444 struct fw3_ipt_rule
*r
;
451 const char *chains
[] = {
454 "forward", "FORWARD",
457 #define jump_target(t) \
458 ((t == FW3_FLAG_REJECT) ? "reject" : fw3_flag_names[t])
460 if (handle
->table
== FW3_TABLE_FILTER
)
462 for (t
= FW3_FLAG_ACCEPT
; t
<= FW3_FLAG_DROP
; t
++)
464 if (t
> FW3_FLAG_ACCEPT
&& zone
->log
& FW3_ZONE_LOG_FILTER
)
466 if (has(zone
->flags
, handle
->family
, fw3_to_src_target(t
)))
468 r
= fw3_ipt_rule_create(handle
, NULL
, dev
, NULL
, sub
, NULL
);
470 snprintf(buf
, sizeof(buf
) - 1, "%s %s in: ",
471 fw3_flag_names
[t
], zone
->name
);
473 fw3_ipt_rule_limit(r
, &zone
->log_limit
);
474 fw3_ipt_rule_target(r
, "LOG");
475 fw3_ipt_rule_addarg(r
, false, "--log-prefix", buf
);
476 fw3_ipt_rule_replace(r
, "zone_%s_src_%s",
477 zone
->name
, fw3_flag_names
[t
]);
480 if (has(zone
->flags
, handle
->family
, t
))
482 r
= fw3_ipt_rule_create(handle
, NULL
, NULL
, dev
, NULL
, sub
);
484 snprintf(buf
, sizeof(buf
) - 1, "%s %s out: ",
485 fw3_flag_names
[t
], zone
->name
);
487 fw3_ipt_rule_limit(r
, &zone
->log_limit
);
488 fw3_ipt_rule_target(r
, "LOG");
489 fw3_ipt_rule_addarg(r
, false, "--log-prefix", buf
);
490 fw3_ipt_rule_replace(r
, "zone_%s_dest_%s",
491 zone
->name
, fw3_flag_names
[t
]);
495 if (has(zone
->flags
, handle
->family
, fw3_to_src_target(t
)))
497 r
= fw3_ipt_rule_create(handle
, NULL
, dev
, NULL
, sub
, NULL
);
498 fw3_ipt_rule_target(r
, jump_target(t
));
499 fw3_ipt_rule_extra(r
, zone
->extra_src
);
501 if (t
== FW3_FLAG_ACCEPT
&& !state
->defaults
.drop_invalid
)
502 fw3_ipt_rule_extra(r
,
503 "-m conntrack --ctstate NEW,UNTRACKED");
505 fw3_ipt_rule_replace(r
, "zone_%s_src_%s", zone
->name
,
509 if (has(zone
->flags
, handle
->family
, t
))
511 if (t
== FW3_FLAG_ACCEPT
&&
512 zone
->masq
&& !zone
->masq_allow_invalid
)
514 r
= fw3_ipt_rule_create(handle
, NULL
, NULL
, dev
, NULL
, sub
);
515 fw3_ipt_rule_extra(r
, "-m conntrack --ctstate INVALID");
516 fw3_ipt_rule_comment(r
, "Prevent NAT leakage");
517 fw3_ipt_rule_target(r
, fw3_flag_names
[FW3_FLAG_DROP
]);
518 fw3_ipt_rule_replace(r
, "zone_%s_dest_%s", zone
->name
,
522 r
= fw3_ipt_rule_create(handle
, NULL
, NULL
, dev
, NULL
, sub
);
523 fw3_ipt_rule_target(r
, jump_target(t
));
524 fw3_ipt_rule_extra(r
, zone
->extra_dest
);
525 fw3_ipt_rule_replace(r
, "zone_%s_dest_%s", zone
->name
,
530 for (i
= 0; i
< sizeof(chains
)/sizeof(chains
[0]); i
+= 2)
532 if (*chains
[i
] == 'o')
533 r
= fw3_ipt_rule_create(handle
, NULL
, NULL
, dev
, NULL
, sub
);
535 r
= fw3_ipt_rule_create(handle
, NULL
, dev
, NULL
, sub
, NULL
);
537 fw3_ipt_rule_target(r
, "zone_%s_%s", zone
->name
, chains
[i
]);
539 if (*chains
[i
] == 'o')
540 fw3_ipt_rule_extra(r
, zone
->extra_dest
);
542 fw3_ipt_rule_extra(r
, zone
->extra_src
);
544 fw3_ipt_rule_replace(r
, chains
[i
+ 1]);
547 else if (handle
->table
== FW3_TABLE_NAT
)
549 if (has(zone
->flags
, handle
->family
, FW3_FLAG_DNAT
))
551 r
= fw3_ipt_rule_create(handle
, NULL
, dev
, NULL
, sub
, NULL
);
552 fw3_ipt_rule_target(r
, "zone_%s_prerouting", zone
->name
);
553 fw3_ipt_rule_extra(r
, zone
->extra_src
);
554 fw3_ipt_rule_replace(r
, "PREROUTING");
557 if (has(zone
->flags
, handle
->family
, FW3_FLAG_SNAT
))
559 r
= fw3_ipt_rule_create(handle
, NULL
, NULL
, dev
, NULL
, sub
);
560 fw3_ipt_rule_target(r
, "zone_%s_postrouting", zone
->name
);
561 fw3_ipt_rule_extra(r
, zone
->extra_dest
);
562 fw3_ipt_rule_replace(r
, "POSTROUTING");
565 else if (handle
->table
== FW3_TABLE_MANGLE
)
569 if (zone
->log
& FW3_ZONE_LOG_MANGLE
)
571 snprintf(buf
, sizeof(buf
) - 1, "MSSFIX %s out: ", zone
->name
);
573 r
= fw3_ipt_rule_create(handle
, &tcp
, NULL
, dev
, NULL
, sub
);
574 fw3_ipt_rule_addarg(r
, false, "--tcp-flags", "SYN,RST");
575 fw3_ipt_rule_addarg(r
, false, "SYN", NULL
);
576 fw3_ipt_rule_limit(r
, &zone
->log_limit
);
577 fw3_ipt_rule_comment(r
, "Zone %s MTU fix logging", zone
->name
);
578 fw3_ipt_rule_target(r
, "LOG");
579 fw3_ipt_rule_addarg(r
, false, "--log-prefix", buf
);
580 fw3_ipt_rule_replace(r
, "FORWARD");
583 r
= fw3_ipt_rule_create(handle
, &tcp
, NULL
, dev
, NULL
, sub
);
584 fw3_ipt_rule_addarg(r
, false, "--tcp-flags", "SYN,RST");
585 fw3_ipt_rule_addarg(r
, false, "SYN", NULL
);
586 fw3_ipt_rule_comment(r
, "Zone %s MTU fixing", zone
->name
);
587 fw3_ipt_rule_target(r
, "TCPMSS");
588 fw3_ipt_rule_addarg(r
, false, "--clamp-mss-to-pmtu", NULL
);
589 fw3_ipt_rule_replace(r
, "FORWARD");
591 r
= fw3_ipt_rule_create(handle
, &tcp
, dev
, NULL
, sub
, NULL
);
592 fw3_ipt_rule_addarg(r
, false, "--tcp-flags", "SYN,RST");
593 fw3_ipt_rule_addarg(r
, false, "SYN", NULL
);
594 fw3_ipt_rule_comment(r
, "Zone %s MTU fixing", zone
->name
);
595 fw3_ipt_rule_target(r
, "TCPMSS");
596 fw3_ipt_rule_addarg(r
, false, "--clamp-mss-to-pmtu", NULL
);
597 fw3_ipt_rule_replace(r
, "FORWARD");
600 else if (handle
->table
== FW3_TABLE_RAW
)
602 bool loopback_dev
= (dev
!= NULL
&& !dev
->any
&&
603 !dev
->invert
&& fw3_check_loopback_dev(dev
->name
));
604 char *chain
= loopback_dev
|| (sub
!= NULL
&& !sub
->invert
&& fw3_check_loopback_addr(sub
)) ?
605 "OUTPUT" : "PREROUTING";
607 if (has(zone
->flags
, handle
->family
, FW3_FLAG_HELPER
))
609 r
= fw3_ipt_rule_create(handle
, NULL
, loopback_dev
? NULL
: dev
, NULL
, sub
, NULL
);
610 fw3_ipt_rule_comment(r
, "%s CT helper assignment", zone
->name
);
611 fw3_ipt_rule_target(r
, "zone_%s_helper", zone
->name
);
612 fw3_ipt_rule_extra(r
, zone
->extra_src
);
613 fw3_ipt_rule_replace(r
, chain
);
616 if (has(zone
->flags
, handle
->family
, FW3_FLAG_NOTRACK
))
618 r
= fw3_ipt_rule_create(handle
, NULL
, loopback_dev
? NULL
: dev
, NULL
, sub
, NULL
);
619 fw3_ipt_rule_comment(r
, "%s CT bypass", zone
->name
);
620 fw3_ipt_rule_target(r
, "zone_%s_notrack", zone
->name
);
621 fw3_ipt_rule_extra(r
, zone
->extra_src
);
622 fw3_ipt_rule_replace(r
, chain
);
628 print_interface_rules(struct fw3_ipt_handle
*handle
, struct fw3_state
*state
,
629 bool reload
, struct fw3_zone
*zone
)
631 struct fw3_device
*dev
;
632 struct fw3_address
*sub
;
634 fw3_foreach(dev
, &zone
->devices
)
635 fw3_foreach(sub
, &zone
->subnets
)
637 if (!fw3_is_family(sub
, handle
->family
))
640 if (!dev
&& !sub
&& !zone
->extra_src
&& !zone
->extra_dest
)
643 print_interface_rule(handle
, state
, reload
, zone
, dev
, sub
);
647 static struct fw3_address
*
648 next_addr(struct fw3_address
*addr
, struct list_head
*list
,
649 enum fw3_family family
, bool invert
)
652 struct fw3_address
*rv
;
654 for (p
= addr
? addr
->list
.next
: list
->next
; p
!= list
; p
= p
->next
)
656 rv
= list_entry(p
, struct fw3_address
, list
);
658 if (fw3_is_family(rv
, family
) && rv
->set
&& rv
->invert
== invert
)
666 print_zone_rule(struct fw3_ipt_handle
*handle
, struct fw3_state
*state
,
667 bool reload
, struct fw3_zone
*zone
)
669 bool first_src
, first_dest
;
670 struct fw3_address
*msrc
;
671 struct fw3_address
*mdest
;
672 struct fw3_ipt_rule
*r
;
674 if (!fw3_is_family(zone
, handle
->family
))
677 info(" * Zone '%s'", zone
->name
);
679 switch (handle
->table
)
681 case FW3_TABLE_FILTER
:
682 if (has(zone
->flags
, handle
->family
, FW3_FLAG_DNAT
))
684 r
= fw3_ipt_rule_new(handle
);
685 fw3_ipt_rule_extra(r
, "-m conntrack --ctstate DNAT");
686 fw3_ipt_rule_comment(r
, "Accept port redirections");
687 fw3_ipt_rule_target(r
, fw3_flag_names
[FW3_FLAG_ACCEPT
]);
688 fw3_ipt_rule_append(r
, "zone_%s_input", zone
->name
);
690 r
= fw3_ipt_rule_new(handle
);
691 fw3_ipt_rule_extra(r
, "-m conntrack --ctstate DNAT");
692 fw3_ipt_rule_comment(r
, "Accept port forwards");
693 fw3_ipt_rule_target(r
, fw3_flag_names
[FW3_FLAG_ACCEPT
]);
694 fw3_ipt_rule_append(r
, "zone_%s_forward", zone
->name
);
697 r
= fw3_ipt_rule_new(handle
);
698 fw3_ipt_rule_target(r
, "zone_%s_src_%s", zone
->name
,
699 fw3_flag_names
[zone
->policy_input
]);
700 fw3_ipt_rule_append(r
, "zone_%s_input", zone
->name
);
702 r
= fw3_ipt_rule_new(handle
);
703 fw3_ipt_rule_target(r
, "zone_%s_dest_%s", zone
->name
,
704 fw3_flag_names
[zone
->policy_forward
]);
705 fw3_ipt_rule_append(r
, "zone_%s_forward", zone
->name
);
707 r
= fw3_ipt_rule_new(handle
);
708 fw3_ipt_rule_target(r
, "zone_%s_dest_%s", zone
->name
,
709 fw3_flag_names
[zone
->policy_output
]);
710 fw3_ipt_rule_append(r
, "zone_%s_output", zone
->name
);
715 if (zone
->masq
&& handle
->family
== FW3_FAMILY_V4
)
717 /* for any negated masq_src ip, emit -s addr -j RETURN rules */
719 (msrc
= next_addr(msrc
, &zone
->masq_src
,
720 handle
->family
, true)) != NULL
; )
722 msrc
->invert
= false;
723 r
= fw3_ipt_rule_new(handle
);
724 fw3_ipt_rule_src_dest(r
, msrc
, NULL
);
725 fw3_ipt_rule_target(r
, "RETURN");
726 fw3_ipt_rule_append(r
, "zone_%s_postrouting", zone
->name
);
730 /* for any negated masq_dest ip, emit -d addr -j RETURN rules */
732 (mdest
= next_addr(mdest
, &zone
->masq_dest
,
733 handle
->family
, true)) != NULL
; )
735 mdest
->invert
= false;
736 r
= fw3_ipt_rule_new(handle
);
737 fw3_ipt_rule_src_dest(r
, NULL
, mdest
);
738 fw3_ipt_rule_target(r
, "RETURN");
739 fw3_ipt_rule_append(r
, "zone_%s_postrouting", zone
->name
);
740 mdest
->invert
= true;
743 /* emit masquerading entries for non-negated addresses
744 and ensure that both src and dest loops run at least once,
745 even if there are no relevant addresses */
746 for (first_src
= true, msrc
= NULL
;
747 (msrc
= next_addr(msrc
, &zone
->masq_src
,
748 handle
->family
, false)) || first_src
;
751 for (first_dest
= true, mdest
= NULL
;
752 (mdest
= next_addr(mdest
, &zone
->masq_dest
,
753 handle
->family
, false)) || first_dest
;
756 r
= fw3_ipt_rule_new(handle
);
757 fw3_ipt_rule_src_dest(r
, msrc
, mdest
);
758 fw3_ipt_rule_target(r
, "MASQUERADE");
759 fw3_ipt_rule_append(r
, "zone_%s_postrouting", zone
->name
);
766 fw3_print_cthelpers(handle
, state
, zone
);
769 case FW3_TABLE_MANGLE
:
773 print_interface_rules(handle
, state
, reload
, zone
);
777 fw3_print_zone_chains(struct fw3_ipt_handle
*handle
, struct fw3_state
*state
,
780 struct fw3_zone
*zone
;
782 list_for_each_entry(zone
, &state
->zones
, list
)
783 print_zone_chain(handle
, state
, reload
, zone
);
787 fw3_print_zone_rules(struct fw3_ipt_handle
*handle
, struct fw3_state
*state
,
790 struct fw3_zone
*zone
;
792 list_for_each_entry(zone
, &state
->zones
, list
)
793 print_zone_rule(handle
, state
, reload
, zone
);
797 fw3_flush_zones(struct fw3_ipt_handle
*handle
, struct fw3_state
*state
,
800 struct fw3_zone
*z
, *tmp
;
801 const struct fw3_chain_spec
*c
;
803 list_for_each_entry_safe(z
, tmp
, &state
->zones
, list
)
805 if (!has(z
->flags
, handle
->family
, handle
->table
))
808 /* first flush all rules ... */
809 for (c
= zone_chains
; c
->format
; c
++)
811 /* don't touch user chains on selective stop */
812 if (reload
&& c
->flag
== FW3_FLAG_CUSTOM_CHAINS
)
815 if (!fw3_is_family(c
, handle
->family
))
818 if (c
->table
!= handle
->table
)
821 if (c
->flag
&& !has(z
->flags
, handle
->family
, c
->flag
))
824 fw3_ipt_flush_chain(handle
, format_chain(c
->format
, z
->name
));
827 /* ... then remove the chains */
828 for (c
= zone_chains
; c
->format
; c
++)
830 if (!fw3_is_family(c
, handle
->family
))
833 if (c
->table
!= handle
->table
)
836 if (c
->flag
&& !has(z
->flags
, handle
->family
, c
->flag
))
839 fw3_ipt_delete_chain(handle
, reload
,
840 format_chain(c
->format
, z
->name
));
843 del(z
->flags
, handle
->family
, handle
->table
);
848 fw3_hotplug_zones(struct fw3_state
*state
, bool add
)
851 struct fw3_device
*d
;
853 list_for_each_entry(z
, &state
->zones
, list
)
855 if (add
!= fw3_hasbit(z
->flags
[0], FW3_FLAG_HOTPLUG
))
857 list_for_each_entry(d
, &z
->devices
, list
)
858 fw3_hotplug(add
, z
, d
);
861 fw3_setbit(z
->flags
[0], FW3_FLAG_HOTPLUG
);
863 fw3_delbit(z
->flags
[0], FW3_FLAG_HOTPLUG
);
869 fw3_lookup_zone(struct fw3_state
*state
, const char *name
)
873 if (list_empty(&state
->zones
))
876 list_for_each_entry(z
, &state
->zones
, list
)
878 if (strcmp(z
->name
, name
))
888 fw3_resolve_zone_addresses(struct fw3_zone
*zone
, struct fw3_address
*addr
)
890 struct fw3_device
*net
;
891 struct fw3_address
*cur
, *tmp
;
892 struct list_head
*all
;
894 all
= calloc(1, sizeof(*all
));
900 if (addr
&& addr
->set
)
902 tmp
= malloc(sizeof(*tmp
));
907 list_add_tail(&tmp
->list
, all
);
912 list_for_each_entry(net
, &zone
->networks
, list
)
913 fw3_ubus_address(all
, net
->name
);
915 list_for_each_entry(cur
, &zone
->subnets
, list
)
917 tmp
= malloc(sizeof(*tmp
));
923 list_add_tail(&tmp
->list
, all
);