zones: allow untracked traffic as well
[project/firewall3.git] / zones.c
1 /*
2 * firewall3 - 3rd OpenWrt UCI firewall implementation
3 *
4 * Copyright (C) 2013 Jo-Philipp Wich <jo@mein.io>
5 *
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.
9 *
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.
17 */
18
19 #include "zones.h"
20 #include "ubus.h"
21
22
23 #define C(f, tbl, tgt, fmt) \
24 { FW3_FAMILY_##f, FW3_TABLE_##tbl, FW3_FLAG_##tgt, fmt }
25
26 static const struct fw3_chain_spec zone_chains[] = {
27 C(ANY, FILTER, UNSPEC, "zone_%s_input"),
28 C(ANY, FILTER, UNSPEC, "zone_%s_output"),
29 C(ANY, FILTER, UNSPEC, "zone_%s_forward"),
30
31 C(ANY, FILTER, SRC_ACCEPT, "zone_%s_src_ACCEPT"),
32 C(ANY, FILTER, SRC_REJECT, "zone_%s_src_REJECT"),
33 C(ANY, FILTER, SRC_DROP, "zone_%s_src_DROP"),
34
35 C(ANY, FILTER, ACCEPT, "zone_%s_dest_ACCEPT"),
36 C(ANY, FILTER, REJECT, "zone_%s_dest_REJECT"),
37 C(ANY, FILTER, DROP, "zone_%s_dest_DROP"),
38
39 C(V4, NAT, SNAT, "zone_%s_postrouting"),
40 C(V4, NAT, DNAT, "zone_%s_prerouting"),
41
42 C(ANY, RAW, NOTRACK, "zone_%s_notrack"),
43
44 C(ANY, FILTER, CUSTOM_CHAINS, "input_%s_rule"),
45 C(ANY, FILTER, CUSTOM_CHAINS, "output_%s_rule"),
46 C(ANY, FILTER, CUSTOM_CHAINS, "forwarding_%s_rule"),
47
48 C(V4, NAT, CUSTOM_CHAINS, "prerouting_%s_rule"),
49 C(V4, NAT, CUSTOM_CHAINS, "postrouting_%s_rule"),
50
51 { }
52 };
53
54 const struct fw3_option fw3_zone_opts[] = {
55 FW3_OPT("enabled", bool, zone, enabled),
56
57 FW3_OPT("name", string, zone, name),
58 FW3_OPT("family", family, zone, family),
59
60 FW3_LIST("network", device, zone, networks),
61 FW3_LIST("device", device, zone, devices),
62 FW3_LIST("subnet", network, zone, subnets),
63
64 FW3_OPT("input", target, zone, policy_input),
65 FW3_OPT("forward", target, zone, policy_forward),
66 FW3_OPT("output", target, zone, policy_output),
67
68 FW3_OPT("masq", bool, zone, masq),
69 FW3_LIST("masq_src", network, zone, masq_src),
70 FW3_LIST("masq_dest", network, zone, masq_dest),
71
72 FW3_OPT("extra", string, zone, extra_src),
73 FW3_OPT("extra_src", string, zone, extra_src),
74 FW3_OPT("extra_dest", string, zone, extra_dest),
75
76 FW3_OPT("conntrack", bool, zone, conntrack),
77 FW3_OPT("mtu_fix", bool, zone, mtu_fix),
78 FW3_OPT("custom_chains", bool, zone, custom_chains),
79
80 FW3_OPT("log", bool, zone, log),
81 FW3_OPT("log_limit", limit, zone, log_limit),
82
83 FW3_OPT("__flags_v4", int, zone, flags[0]),
84 FW3_OPT("__flags_v6", int, zone, flags[1]),
85
86 FW3_LIST("__addrs", address, zone, old_addrs),
87
88 { }
89 };
90
91
92 static void
93 check_policy(struct uci_element *e, enum fw3_flag *pol, enum fw3_flag def,
94 const char *name)
95 {
96 if (*pol == FW3_FLAG_UNSPEC)
97 {
98 warn_elem(e, "has no %s policy specified, using default", name);
99 *pol = def;
100 }
101 else if (*pol > FW3_FLAG_DROP)
102 {
103 warn_elem(e, "has invalid %s policy, using default", name);
104 *pol = def;
105 }
106 }
107
108 static void
109 resolve_networks(struct uci_element *e, struct fw3_zone *zone)
110 {
111 struct fw3_device *net, *tmp;
112
113 list_for_each_entry(net, &zone->networks, list)
114 {
115 tmp = fw3_ubus_device(net->name);
116
117 if (!tmp)
118 {
119 warn_elem(e, "cannot resolve device of network '%s'", net->name);
120 continue;
121 }
122
123 snprintf(tmp->network, sizeof(tmp->network), "%s", net->name);
124 list_add_tail(&tmp->list, &zone->devices);
125 }
126 }
127
128 struct fw3_zone *
129 fw3_alloc_zone(void)
130 {
131 struct fw3_zone *zone;
132
133 zone = calloc(1, sizeof(*zone));
134 if (!zone)
135 return NULL;
136
137 INIT_LIST_HEAD(&zone->networks);
138 INIT_LIST_HEAD(&zone->devices);
139 INIT_LIST_HEAD(&zone->subnets);
140 INIT_LIST_HEAD(&zone->masq_src);
141 INIT_LIST_HEAD(&zone->masq_dest);
142
143 INIT_LIST_HEAD(&zone->old_addrs);
144
145 zone->enabled = true;
146 zone->custom_chains = true;
147 zone->log_limit.rate = 10;
148
149 return zone;
150 }
151
152 void
153 fw3_load_zones(struct fw3_state *state, struct uci_package *p)
154 {
155 struct uci_section *s;
156 struct uci_element *e;
157 struct fw3_zone *zone;
158 struct fw3_defaults *defs = &state->defaults;
159
160 INIT_LIST_HEAD(&state->zones);
161
162 uci_foreach_element(&p->sections, e)
163 {
164 s = uci_to_section(e);
165
166 if (strcmp(s->type, "zone"))
167 continue;
168
169 zone = fw3_alloc_zone();
170
171 if (!zone)
172 continue;
173
174 fw3_parse_options(zone, fw3_zone_opts, s);
175
176 if (!zone->enabled)
177 {
178 fw3_free_zone(zone);
179 continue;
180 }
181
182 if (!zone->extra_dest)
183 zone->extra_dest = zone->extra_src;
184
185 if (!defs->custom_chains && zone->custom_chains)
186 zone->custom_chains = false;
187
188 if (!zone->name || !*zone->name)
189 {
190 warn_elem(e, "has no name - ignoring");
191 fw3_free_zone(zone);
192 continue;
193 }
194
195 if (strlen(zone->name) > FW3_ZONE_MAXNAMELEN)
196 {
197 warn_elem(e, "must not have a name longer than %u characters",
198 FW3_ZONE_MAXNAMELEN);
199 fw3_free_zone(zone);
200 continue;
201 }
202
203 fw3_ubus_zone_devices(zone);
204
205 if (list_empty(&zone->networks) && list_empty(&zone->devices) &&
206 list_empty(&zone->subnets) && !zone->extra_src)
207 {
208 warn_elem(e, "has no device, network, subnet or extra options");
209 }
210
211 check_policy(e, &zone->policy_input, defs->policy_input, "input");
212 check_policy(e, &zone->policy_output, defs->policy_output, "output");
213 check_policy(e, &zone->policy_forward, defs->policy_forward, "forward");
214
215 resolve_networks(e, zone);
216
217 if (zone->masq)
218 {
219 setbit(zone->flags[0], FW3_FLAG_SNAT);
220 zone->conntrack = true;
221 }
222
223 if (zone->custom_chains)
224 {
225 setbit(zone->flags[0], FW3_FLAG_SNAT);
226 setbit(zone->flags[0], FW3_FLAG_DNAT);
227 }
228
229 setbit(zone->flags[0], fw3_to_src_target(zone->policy_input));
230 setbit(zone->flags[0], zone->policy_forward);
231 setbit(zone->flags[0], zone->policy_output);
232
233 setbit(zone->flags[1], fw3_to_src_target(zone->policy_input));
234 setbit(zone->flags[1], zone->policy_forward);
235 setbit(zone->flags[1], zone->policy_output);
236
237 list_add_tail(&zone->list, &state->zones);
238 }
239 }
240
241
242 static void
243 print_zone_chain(struct fw3_ipt_handle *handle, struct fw3_state *state,
244 bool reload, struct fw3_zone *zone)
245 {
246 int i;
247 struct fw3_ipt_rule *r;
248 const struct fw3_chain_spec *c;
249
250 const char *flt_chains[] = {
251 "input", "input",
252 "output", "output",
253 "forward", "forwarding",
254 };
255
256 const char *nat_chains[] = {
257 "prerouting", "prerouting",
258 "postrouting", "postrouting",
259 };
260
261 if (!fw3_is_family(zone, handle->family))
262 return;
263
264 info(" * Zone '%s'", zone->name);
265
266 set(zone->flags, handle->family, handle->table);
267
268 if (zone->custom_chains)
269 set(zone->flags, handle->family, FW3_FLAG_CUSTOM_CHAINS);
270
271 if (!zone->conntrack && !state->defaults.drop_invalid)
272 set(zone->flags, handle->family, FW3_FLAG_NOTRACK);
273
274 for (c = zone_chains; c->format; c++)
275 {
276 /* don't touch user chains on selective stop */
277 if (reload && c->flag == FW3_FLAG_CUSTOM_CHAINS)
278 continue;
279
280 if (!fw3_is_family(c, handle->family))
281 continue;
282
283 if (c->table != handle->table)
284 continue;
285
286 if (c->flag &&
287 !hasbit(zone->flags[handle->family == FW3_FAMILY_V6], c->flag))
288 continue;
289
290 fw3_ipt_create_chain(handle, c->format, zone->name);
291 }
292
293 if (zone->custom_chains)
294 {
295 if (handle->table == FW3_TABLE_FILTER)
296 {
297 for (i = 0; i < sizeof(flt_chains)/sizeof(flt_chains[0]); i += 2)
298 {
299 r = fw3_ipt_rule_new(handle);
300 fw3_ipt_rule_comment(r, "user chain for %s", flt_chains[i+1]);
301 fw3_ipt_rule_target(r, "%s_%s_rule", flt_chains[i+1], zone->name);
302 fw3_ipt_rule_append(r, "zone_%s_%s", zone->name, flt_chains[i]);
303 }
304 }
305 else if (handle->table == FW3_TABLE_NAT)
306 {
307 for (i = 0; i < sizeof(nat_chains)/sizeof(nat_chains[0]); i += 2)
308 {
309 r = fw3_ipt_rule_new(handle);
310 fw3_ipt_rule_comment(r, "user chain for %s", nat_chains[i+1]);
311 fw3_ipt_rule_target(r, "%s_%s_rule", nat_chains[i+1], zone->name);
312 fw3_ipt_rule_append(r, "zone_%s_%s", zone->name, nat_chains[i]);
313 }
314 }
315 }
316
317 set(zone->flags, handle->family, handle->table);
318 }
319
320 static void
321 print_interface_rule(struct fw3_ipt_handle *handle, struct fw3_state *state,
322 bool reload, struct fw3_zone *zone,
323 struct fw3_device *dev, struct fw3_address *sub)
324 {
325 struct fw3_protocol tcp = { .protocol = 6 };
326 struct fw3_ipt_rule *r;
327 enum fw3_flag t;
328
329 char buf[32];
330
331 int i;
332
333 const char *chains[] = {
334 "input", "INPUT",
335 "output", "OUTPUT",
336 "forward", "FORWARD",
337 };
338
339 #define jump_target(t) \
340 ((t == FW3_FLAG_REJECT) ? "reject" : fw3_flag_names[t])
341
342 if (handle->table == FW3_TABLE_FILTER)
343 {
344 for (t = FW3_FLAG_ACCEPT; t <= FW3_FLAG_DROP; t++)
345 {
346 if (has(zone->flags, handle->family, fw3_to_src_target(t)))
347 {
348 r = fw3_ipt_rule_create(handle, NULL, dev, NULL, sub, NULL);
349 fw3_ipt_rule_target(r, jump_target(t));
350 fw3_ipt_rule_extra(r, zone->extra_src);
351
352 if (t == FW3_FLAG_ACCEPT && !state->defaults.drop_invalid)
353 fw3_ipt_rule_extra(r,
354 "-m conntrack --ctstate NEW,UNTRACKED");
355
356 fw3_ipt_rule_replace(r, "zone_%s_src_%s", zone->name,
357 fw3_flag_names[t]);
358 }
359
360 if (has(zone->flags, handle->family, t))
361 {
362 r = fw3_ipt_rule_create(handle, NULL, NULL, dev, NULL, sub);
363 fw3_ipt_rule_target(r, jump_target(t));
364 fw3_ipt_rule_extra(r, zone->extra_dest);
365
366 if (t == FW3_FLAG_ACCEPT && !state->defaults.drop_invalid)
367 fw3_ipt_rule_extra(r,
368 "-m conntrack --ctstate NEW,UNTRACKED");
369
370 fw3_ipt_rule_replace(r, "zone_%s_dest_%s", zone->name,
371 fw3_flag_names[t]);
372 }
373 }
374
375 for (i = 0; i < sizeof(chains)/sizeof(chains[0]); i += 2)
376 {
377 if (*chains[i] == 'o')
378 r = fw3_ipt_rule_create(handle, NULL, NULL, dev, NULL, sub);
379 else
380 r = fw3_ipt_rule_create(handle, NULL, dev, NULL, sub, NULL);
381
382 fw3_ipt_rule_target(r, "zone_%s_%s", zone->name, chains[i]);
383
384 if (*chains[i] == 'o')
385 fw3_ipt_rule_extra(r, zone->extra_dest);
386 else
387 fw3_ipt_rule_extra(r, zone->extra_src);
388
389 fw3_ipt_rule_replace(r, chains[i + 1]);
390 }
391 }
392 else if (handle->table == FW3_TABLE_NAT)
393 {
394 if (has(zone->flags, handle->family, FW3_FLAG_DNAT))
395 {
396 r = fw3_ipt_rule_create(handle, NULL, dev, NULL, sub, NULL);
397 fw3_ipt_rule_target(r, "zone_%s_prerouting", zone->name);
398 fw3_ipt_rule_extra(r, zone->extra_src);
399 fw3_ipt_rule_replace(r, "PREROUTING");
400 }
401
402 if (has(zone->flags, handle->family, FW3_FLAG_SNAT))
403 {
404 r = fw3_ipt_rule_create(handle, NULL, NULL, dev, NULL, sub);
405 fw3_ipt_rule_target(r, "zone_%s_postrouting", zone->name);
406 fw3_ipt_rule_extra(r, zone->extra_dest);
407 fw3_ipt_rule_replace(r, "POSTROUTING");
408 }
409 }
410 else if (handle->table == FW3_TABLE_MANGLE)
411 {
412 if (zone->mtu_fix)
413 {
414 if (zone->log)
415 {
416 snprintf(buf, sizeof(buf) - 1, "MSSFIX(%s): ", zone->name);
417
418 r = fw3_ipt_rule_create(handle, &tcp, NULL, dev, NULL, sub);
419 fw3_ipt_rule_addarg(r, false, "--tcp-flags", "SYN,RST");
420 fw3_ipt_rule_addarg(r, false, "SYN", NULL);
421 fw3_ipt_rule_limit(r, &zone->log_limit);
422 fw3_ipt_rule_comment(r, "%s (mtu_fix logging)", zone->name);
423 fw3_ipt_rule_target(r, "LOG");
424 fw3_ipt_rule_addarg(r, false, "--log-prefix", buf);
425 fw3_ipt_rule_replace(r, "FORWARD");
426 }
427
428 r = fw3_ipt_rule_create(handle, &tcp, NULL, dev, NULL, sub);
429 fw3_ipt_rule_addarg(r, false, "--tcp-flags", "SYN,RST");
430 fw3_ipt_rule_addarg(r, false, "SYN", NULL);
431 fw3_ipt_rule_comment(r, "%s (mtu_fix)", zone->name);
432 fw3_ipt_rule_target(r, "TCPMSS");
433 fw3_ipt_rule_addarg(r, false, "--clamp-mss-to-pmtu", NULL);
434 fw3_ipt_rule_replace(r, "FORWARD");
435 }
436 }
437 else if (handle->table == FW3_TABLE_RAW)
438 {
439 if (has(zone->flags, handle->family, FW3_FLAG_NOTRACK))
440 {
441 r = fw3_ipt_rule_create(handle, NULL, dev, NULL, sub, NULL);
442 fw3_ipt_rule_target(r, "zone_%s_notrack", zone->name);
443 fw3_ipt_rule_extra(r, zone->extra_src);
444 fw3_ipt_rule_replace(r, "PREROUTING");
445 }
446 }
447 }
448
449 static void
450 print_interface_rules(struct fw3_ipt_handle *handle, struct fw3_state *state,
451 bool reload, struct fw3_zone *zone)
452 {
453 struct fw3_device *dev;
454 struct fw3_address *sub;
455
456 fw3_foreach(dev, &zone->devices)
457 fw3_foreach(sub, &zone->subnets)
458 {
459 if (!fw3_is_family(sub, handle->family))
460 continue;
461
462 if (!dev && !sub)
463 continue;
464
465 print_interface_rule(handle, state, reload, zone, dev, sub);
466 }
467 }
468
469 static void
470 print_zone_rule(struct fw3_ipt_handle *handle, struct fw3_state *state,
471 bool reload, struct fw3_zone *zone)
472 {
473 bool disable_notrack = state->defaults.drop_invalid;
474 struct fw3_address *msrc;
475 struct fw3_address *mdest;
476 struct fw3_ipt_rule *r;
477
478 enum fw3_flag t;
479 char buf[32];
480
481 if (!fw3_is_family(zone, handle->family))
482 return;
483
484 switch (handle->table)
485 {
486 case FW3_TABLE_FILTER:
487 if (has(zone->flags, handle->family, FW3_FLAG_DNAT))
488 {
489 r = fw3_ipt_rule_new(handle);
490 fw3_ipt_rule_extra(r, "-m conntrack --ctstate DNAT");
491 fw3_ipt_rule_comment(r, "Accept port redirections");
492 fw3_ipt_rule_target(r, fw3_flag_names[FW3_FLAG_ACCEPT]);
493 fw3_ipt_rule_append(r, "zone_%s_input", zone->name);
494
495 r = fw3_ipt_rule_new(handle);
496 fw3_ipt_rule_extra(r, "-m conntrack --ctstate DNAT");
497 fw3_ipt_rule_comment(r, "Accept port forwards");
498 fw3_ipt_rule_target(r, fw3_flag_names[FW3_FLAG_ACCEPT]);
499 fw3_ipt_rule_append(r, "zone_%s_forward", zone->name);
500 }
501
502 r = fw3_ipt_rule_new(handle);
503 fw3_ipt_rule_target(r, "zone_%s_src_%s", zone->name,
504 fw3_flag_names[zone->policy_input]);
505 fw3_ipt_rule_append(r, "zone_%s_input", zone->name);
506
507 r = fw3_ipt_rule_new(handle);
508 fw3_ipt_rule_target(r, "zone_%s_dest_%s", zone->name,
509 fw3_flag_names[zone->policy_forward]);
510 fw3_ipt_rule_append(r, "zone_%s_forward", zone->name);
511
512 r = fw3_ipt_rule_new(handle);
513 fw3_ipt_rule_target(r, "zone_%s_dest_%s", zone->name,
514 fw3_flag_names[zone->policy_output]);
515 fw3_ipt_rule_append(r, "zone_%s_output", zone->name);
516
517 if (zone->log)
518 {
519 for (t = FW3_FLAG_REJECT; t <= FW3_FLAG_DROP; t++)
520 {
521 if (has(zone->flags, handle->family, fw3_to_src_target(t)))
522 {
523 r = fw3_ipt_rule_new(handle);
524
525 snprintf(buf, sizeof(buf) - 1, "%s(src %s)",
526 fw3_flag_names[t], zone->name);
527
528 fw3_ipt_rule_limit(r, &zone->log_limit);
529 fw3_ipt_rule_target(r, "LOG");
530 fw3_ipt_rule_addarg(r, false, "--log-prefix", buf);
531 fw3_ipt_rule_append(r, "zone_%s_src_%s",
532 zone->name, fw3_flag_names[t]);
533 }
534
535 if (has(zone->flags, handle->family, t))
536 {
537 r = fw3_ipt_rule_new(handle);
538
539 snprintf(buf, sizeof(buf) - 1, "%s(dest %s)",
540 fw3_flag_names[t], zone->name);
541
542 fw3_ipt_rule_limit(r, &zone->log_limit);
543 fw3_ipt_rule_target(r, "LOG");
544 fw3_ipt_rule_addarg(r, false, "--log-prefix", buf);
545 fw3_ipt_rule_append(r, "zone_%s_dest_%s",
546 zone->name, fw3_flag_names[t]);
547 }
548 }
549 }
550 break;
551
552 case FW3_TABLE_NAT:
553 if (zone->masq && handle->family == FW3_FAMILY_V4)
554 {
555 fw3_foreach(msrc, &zone->masq_src)
556 fw3_foreach(mdest, &zone->masq_dest)
557 {
558 if (!fw3_is_family(msrc, handle->family) ||
559 !fw3_is_family(mdest, handle->family))
560 continue;
561
562 r = fw3_ipt_rule_new(handle);
563 fw3_ipt_rule_src_dest(r, msrc, mdest);
564 fw3_ipt_rule_target(r, "MASQUERADE");
565 fw3_ipt_rule_append(r, "zone_%s_postrouting", zone->name);
566 }
567 }
568 break;
569
570 case FW3_TABLE_RAW:
571 if (!zone->conntrack && !disable_notrack)
572 {
573 r = fw3_ipt_rule_new(handle);
574 fw3_ipt_rule_target(r, "CT");
575 fw3_ipt_rule_addarg(r, false, "--notrack", NULL);
576 fw3_ipt_rule_append(r, "zone_%s_notrack", zone->name);
577 }
578 break;
579
580 case FW3_TABLE_MANGLE:
581 break;
582 }
583
584 print_interface_rules(handle, state, reload, zone);
585 }
586
587 void
588 fw3_print_zone_chains(struct fw3_ipt_handle *handle, struct fw3_state *state,
589 bool reload)
590 {
591 struct fw3_zone *zone;
592
593 list_for_each_entry(zone, &state->zones, list)
594 print_zone_chain(handle, state, reload, zone);
595 }
596
597 void
598 fw3_print_zone_rules(struct fw3_ipt_handle *handle, struct fw3_state *state,
599 bool reload)
600 {
601 struct fw3_zone *zone;
602
603 list_for_each_entry(zone, &state->zones, list)
604 print_zone_rule(handle, state, reload, zone);
605 }
606
607 void
608 fw3_flush_zones(struct fw3_ipt_handle *handle, struct fw3_state *state,
609 bool reload)
610 {
611 struct fw3_zone *z, *tmp;
612 const struct fw3_chain_spec *c;
613 char chain[32];
614
615 list_for_each_entry_safe(z, tmp, &state->zones, list)
616 {
617 if (!has(z->flags, handle->family, handle->table))
618 continue;
619
620 for (c = zone_chains; c->format; c++)
621 {
622 /* don't touch user chains on selective stop */
623 if (reload && c->flag == FW3_FLAG_CUSTOM_CHAINS)
624 continue;
625
626 if (!fw3_is_family(c, handle->family))
627 continue;
628
629 if (c->table != handle->table)
630 continue;
631
632 if (c->flag && !has(z->flags, handle->family, c->flag))
633 continue;
634
635 snprintf(chain, sizeof(chain), c->format, z->name);
636 fw3_ipt_flush_chain(handle, chain);
637
638 /* keep certain basic chains that do not depend on any settings to
639 avoid purging unrelated user rules pointing to them */
640 if (reload && !c->flag)
641 continue;
642
643 fw3_ipt_delete_chain(handle, chain);
644 }
645
646 del(z->flags, handle->family, handle->table);
647 }
648 }
649
650 void
651 fw3_hotplug_zones(struct fw3_state *state, bool add)
652 {
653 struct fw3_zone *z;
654 struct fw3_device *d;
655
656 list_for_each_entry(z, &state->zones, list)
657 {
658 if (add != hasbit(z->flags[0], FW3_FLAG_HOTPLUG))
659 {
660 list_for_each_entry(d, &z->devices, list)
661 fw3_hotplug(add, z, d);
662
663 if (add)
664 setbit(z->flags[0], FW3_FLAG_HOTPLUG);
665 else
666 delbit(z->flags[0], FW3_FLAG_HOTPLUG);
667 }
668 }
669 }
670
671 struct fw3_zone *
672 fw3_lookup_zone(struct fw3_state *state, const char *name)
673 {
674 struct fw3_zone *z;
675
676 if (list_empty(&state->zones))
677 return NULL;
678
679 list_for_each_entry(z, &state->zones, list)
680 {
681 if (strcmp(z->name, name))
682 continue;
683
684 return z;
685 }
686
687 return NULL;
688 }
689
690 struct list_head *
691 fw3_resolve_zone_addresses(struct fw3_zone *zone, struct fw3_address *addr)
692 {
693 struct fw3_device *net;
694 struct fw3_address *cur, *tmp;
695 struct list_head *all;
696
697 all = calloc(1, sizeof(*all));
698 if (!all)
699 return NULL;
700
701 INIT_LIST_HEAD(all);
702
703 if (addr && addr->set)
704 {
705 tmp = malloc(sizeof(*tmp));
706
707 if (tmp)
708 {
709 *tmp = *addr;
710 list_add_tail(&tmp->list, all);
711 }
712 }
713 else
714 {
715 list_for_each_entry(net, &zone->networks, list)
716 fw3_ubus_address(all, net->name);
717
718 list_for_each_entry(cur, &zone->subnets, list)
719 {
720 tmp = malloc(sizeof(*tmp));
721
722 if (!tmp)
723 continue;
724
725 *tmp = *cur;
726 list_add_tail(&tmp->list, all);
727 }
728 }
729
730 return all;
731 }